CN118149151B - Small-flow overload-prevention multi-valve cage regulating valve - Google Patents
Small-flow overload-prevention multi-valve cage regulating valve Download PDFInfo
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- CN118149151B CN118149151B CN202410568739.6A CN202410568739A CN118149151B CN 118149151 B CN118149151 B CN 118149151B CN 202410568739 A CN202410568739 A CN 202410568739A CN 118149151 B CN118149151 B CN 118149151B
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 68
- 238000007789 sealing Methods 0.000 claims description 48
- 230000000149 penetrating effect Effects 0.000 claims description 15
- 230000002265 prevention Effects 0.000 claims description 15
- 230000000670 limiting effect Effects 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 abstract description 11
- 230000008859 change Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
- F16K31/048—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means with torque limiters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
- F16D43/202—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type
- F16D43/204—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with intermediate balls or rollers
- F16D43/206—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure of the ratchet type with intermediate balls or rollers moving axially between engagement and disengagement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
- F16K3/267—Combination of a sliding valve and a lift valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/32—Means for additional adjustment of the rate of flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a small-flow overload-prevention multi-valve cage regulating valve, which relates to the technical field of valves and comprises a valve body unit, a valve seat, a plurality of valve cages, a valve cover, a screw rod, a valve core and a motor, wherein the valve seat is arranged in the valve housing, the valve cages are arranged at the upper end of the valve seat, the valve cover is arranged at the top of the valve cage, the screw rod is arranged at the center of the valve cover, the valve core is arranged in the middle of the valve seat, and the motor is arranged at the top of the valve cover. The invention has the beneficial effects that when the valve is opened, the pressure difference can be reduced, the flow area is rapidly increased through the distribution of the second flow holes, and under the condition of high pressure difference, the pressure difference is rapidly reduced along with the change of the opening, so that the final flow can be linearly related to the change of the opening, and the flow can be directly and accurately regulated under the condition that the opening is controlled by the regulating valve.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a small-flow overload-prevention multi-valve cage regulating valve.
Background
The traditional straight-through regulating valve for high pressure difference environment has extremely high speed when a medium passes through a valve sealing pair, especially when the valve is at a small opening, the pressure difference between the front and the back of the valve is highest, cavitation is generated at the outlet of the sealing pair, and particularly when the valve is at the small opening for a long time, the sealing surface is damaged, the sealing failure and the damage of valve internal parts can be caused, the normal regulation cannot be realized, the long-term internal leakage occurs, and the main function of the recirculation regulating valve is lost; in addition, the valve flow is changed rapidly due to the overlarge pressure difference, and the valve has adjustability and poor overall adjusting capability only under the condition of small opening; the installation mode of part of the high pressure difference regulating valve is low in and high out, high pressure medium in the valve has upward thrust to the valve core, the valve is very easy to be in a micro-opening state under the influence of the medium after the valve is closed, and the sealing pair and the valve internal parts are flushed at high speed under the micro-opening condition of the medium, so that the service life of the valve is seriously shortened.
Moreover, when the circuit fault occurs to the motor-driven regulating valve, the motor is in misoperation or continues to rotate, and when the valve is in an already opened and closed state, the overload condition of the motor or the transmission rod is easy to occur, so that the motor and the transmission rod are damaged.
Disclosure of Invention
The present invention has been made in view of the above-mentioned or existing problems occurring in the prior art.
Therefore, the invention aims to provide a small-flow overload-prevention multi-valve cage regulating valve, which can solve the problem that the flow is not easy to accurately control in the high-pressure-difference environment by the traditional straight-through regulation; under a small opening degree, the sealing pair is easy to generate cavitation; and under the drive of the motor, when overload occurs, the motor and the transmission rod are easy to damage.
In order to solve the technical problems, the invention provides the following technical scheme: a small-flow overload-prevention multi-valve cage regulating valve comprises a valve body unit, a valve seat, a plurality of valve cages, a valve cover, a screw rod, a valve core and a motor, wherein the valve seat is arranged in the valve housing;
The overload prevention unit is respectively connected with the motor and the screw rod and comprises a transmission cylinder, a plurality of reset components arranged on the outer wall of the transmission cylinder, a plurality of spring collision beads arranged on the end face of the transmission cylinder and an overload spring arranged at the bottom of the transmission cylinder.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the valve casing comprises an inlet and an outlet which are arranged at two sides of the valve casing, a valve cavity which is arranged at one side of the inlet, and a pressure maintaining cavity which is arranged at one side of the outlet; the inlet is higher than the outlet;
The valve seat comprises a first sealing surface arranged at the opening part of the valve seat, a back pressure valve cage arranged at the bottom of the valve seat, and a plurality of first flow holes penetrating through the outer wall of the back pressure valve cage; the bottom of the back pressure valve cage is sealed;
The valve cage comprises a plurality of second flow holes penetrating through the surface of the valve cage; the number of the second flow holes is increased from bottom to top, the aperture is increased from bottom to top, and the second flow holes are distributed in a spiral rising shape.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the valve cover comprises a plurality of movable holes penetrating through the end face of the valve cover, a screw rod seat arranged at the top of the valve cover, a bearing seat arranged around the screw rod seat, and a motor seat arranged at the top of the bearing seat;
The screw rod comprises a plurality of transmission columns arranged on the outer wall of the end part of the screw rod;
the motor comprises a plurality of transmission blocks arranged on the outer wall of the shaft end of the motor.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the valve core comprises a second sealing surface arranged on the outer wall of the valve core, a plurality of movable columns arranged at the top of the valve core, a matching ring arranged at the top of the movable columns, a sealing ring arranged at the bottom of the valve core, and a plurality of input ports penetrating through the outer wall of the sealing ring.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the transmission cylinder comprises a containing groove arranged at the end face of the transmission cylinder, a plurality of reset cavities arranged in the side wall of the transmission cylinder, and a plurality of T-shaped grooves penetrating through the outer wall of the transmission cylinder;
the reset cavity comprises a first columnar cavity and a second columnar cavity;
The T-shaped groove is communicated with the reset cavity.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the reset assembly comprises a first trigger column, a first spring arranged on the column body of the first trigger column, a second trigger column arranged inside the first trigger column and a second spring arranged at the bottom of the second trigger column.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the first trigger post comprises a first inclined plane arranged at the bottom of the first trigger post, a cylinder arranged at the top of the first trigger post and a third columnar cavity arranged in the first trigger post.
As a preferable scheme of the small-flow overload-prevention multi-valve cage regulating valve, the invention comprises the following steps: the second trigger post comprises a second inclined plane arranged at the top of the second trigger post and a limiting block arranged at the bottom of the second trigger post.
The invention has the beneficial effects that: according to the invention, when the valve is opened, the pressure difference is reduced, the flow area is rapidly increased through the distribution of the second flow holes, and under the condition of high pressure difference, the pressure difference is rapidly reduced along with the change of the opening, so that the final flow can be linearly related to the change of the opening, the flow can be directly and accurately regulated by the regulating valve under the condition of controlling the opening, and the opening value of the valve can be improved due to the arrangement of the multi-layer valve cage, so that the valve is prevented from being used under the condition of small opening for a long time, the most of cavitation is born, the infringement capacity of cavitation on a sealing pair is reduced, and the sealing capacity and the service life of the regulating valve are improved. The motor and the screw rod can be enabled to rotate continuously or malfunction under the condition that the valve is opened and closed, so that the damage of the motor and the screw rod is avoided; meanwhile, after the transmission is disconnected, the transmission can be rebuilt in time by reversing, and an overload prevention mechanism can not be triggered in the normal valve opening adjusting process, namely under the condition of no overload.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is an overall three-dimensional view of the present invention.
Fig. 2 is a full cross-sectional view of the present invention.
Fig. 3 is a diagram of the motor drive connection of the present invention.
Fig. 4 is a partial enlarged view a of fig. 3 according to the present invention.
Fig. 5 is an exploded view of the overload prevention unit of the present invention.
Fig. 6 is a partial cross-sectional view of the overload prevention unit of the present invention.
Fig. 7 is a partial enlarged view B of fig. 6 of the present invention.
In the figure: 1. a valve body unit; 11. a valve housing; 12. a valve seat; 13. a valve cage; 14. a valve cover; 15. a screw rod; 16. a valve core; 17. a motor; 2. an overload prevention unit; 21. a transmission cylinder; 22. a reset assembly; 23. spring ball; 24. an overload spring; 111. an inlet; 112. an outlet; 113. a valve cavity; 114. a pressure maintaining cavity; 121. a first sealing surface; 122. a back pressure valve cage; 123. a first flow hole; 131. a second flow hole; 141. a movable hole; 142. a screw rod seat; 143. a socket; 144. a motor base; 151. a drive column; 171. a transmission block; 161. a second sealing surface; 162. a movable column; 163. a mating ring; 164. a seal ring; 165. an input port; 211. a receiving groove; 212. a reset chamber; 213. a T-shaped groove; 2121. a first columnar cavity; 2122. a second cylindrical cavity; 221. a first trigger post; 222. a first spring; 223. a second trigger post; 224. a second spring; 2211. a first inclined surface; 2212. a cylinder; 2213. a third columnar cavity; 2231. a second inclined surface; 2232. and a limiting block.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 3, in a first embodiment of the present invention, a small flow overload prevention multi-cage adjusting valve is provided, which includes a valve body unit 1, including a valve housing 11, a valve seat 12 disposed in the valve housing 11, a plurality of cages 13 disposed at the upper end of the valve seat 12, a valve cover 14 disposed at the top of the valve cage 13, a screw 15 disposed at the center of the valve cover 14, a valve core 16 disposed in the middle of the valve seat 12, and a motor 17 disposed at the top of the valve cover 14.
Further, the valve housing 11 includes an inlet 111 and an outlet 112 provided at both sides thereof, a valve chamber 113 provided at one side of the inlet 111, and a pressure maintaining chamber 114 provided at one side of the outlet 112; inlet 111 is higher than outlet 112;
The valve seat 12 comprises a first sealing surface 121 arranged at the opening of the valve seat 12, a back pressure valve cage 122 arranged at the bottom of the valve seat 12, and a plurality of first flow holes 123 penetrating the outer wall of the back pressure valve cage 122; the back pressure cage 122 is bottom sealed;
the cage 13 includes a plurality of second flow holes 131 penetrating the surface thereof; the number of the second flow holes 131 increases from bottom to top, the pore diameter increases from bottom to top, and the second flow holes are distributed in a spiral rising shape.
Further, the valve cover 14 includes a plurality of movable holes 141 penetrating through the end surface thereof, a screw rod seat 142 disposed at the top of the valve cover 14, a receiving seat 143 disposed around the screw rod seat 142, and a motor seat 144 disposed at the top of the receiving seat 143;
the screw 15 includes a plurality of driving columns 151 provided at an outer wall of an end portion thereof;
the motor 17 includes a plurality of transmission blocks 171 provided at the outer wall of the shaft end thereof.
Further, the valve core 16 includes a second sealing surface 161 disposed on an outer wall thereof, a plurality of movable posts 162 disposed on a top of the valve core 16, a mating ring 163 disposed on a top of the movable posts 162, a sealing ring 164 disposed on a bottom of the valve core 16, and a plurality of input ports 165 penetrating through an outer wall of the sealing ring 164.
It should be noted that, the pressure difference between the front and the back of the high pressure difference valve is large, the speed of the medium is extremely fast when passing through the valve sealing pair, especially when the valve is at a small opening, the pressure difference between the front and the back of the valve is the highest, cavitation is generated at the outlet of the sealing pair, the sealing surface is damaged, the sealing failure and the damage of the valve internal parts are caused, the normal regulation is not realized, the long-term internal leakage occurs, and the main function of the regulating valve is lost.
Preferably, the inlet 111 and the outlet 112 on the left and right sides of the valve housing 11 adopt a mode of high-inlet and low-outlet, and the conventional low-inlet and high-outlet layout has the following problems that high-pressure medium in the valve has upward thrust to the valve core 16, the valve core 16 is very easy to be in a micro-opening state under the influence of the medium after the valve is closed, and the sealing pair and the valve internal parts are flushed at high speed under the micro-opening condition of the medium, so that the service life of the valve is seriously shortened.
In addition, due to the structure of low inlet and high outlet, impurities in the pipeline enter the sealing auxiliary part and cannot be smoothly discharged from the overflow hole of the valve cage 13, so that the valve core 16 and the valve cage 13 are easily blocked or extruded between the sealing auxiliary parts, the valve cannot be tightly closed, leakage flow is formed, and the sealing auxiliary parts lose sealing performance.
Preferably, a valve cavity 113 is arranged at the communication position of the inlet 111 at the higher position, and a pressure maintaining cavity 114 is arranged at the communication position of the outlet 112 at the lower position. A valve seat 12 is fixed between the valve cavity 113 and the pressure maintaining cavity 114, a back pressure valve cage 122 is fixed at the bottom of the valve seat 12, a plurality of first flow holes 123 which are orderly in position and uniform in quantity are formed in the outer wall of the back pressure valve cage 122, and in addition, a first sealing surface 121 is arranged at the inner ring of the opening at the upper end of the valve seat 12 and can be contacted with a second sealing surface 161 arranged on the outer wall of the valve core 16 to seal the regulating valve.
Preferably, the valve cages 13 are installed on the upper end face of the valve seat 12, the number of the valve cages 13 is more than three, each valve cage 13 is sleeved layer by layer, the whole valve cavity 113 can be plugged, and the medium needs to pass through the valve cages 13 before entering the sealing pair.
The side walls of the valve cages 13 are provided with through second flow holes 131, and the distribution of the second flow holes 131 is different from that of the first flow holes 123, namely, the second flow holes 131 are changed from small to large in the valve cages 13 from bottom to top, and the number of the second flow holes is changed from small to large from bottom to top.
Preferably, the valve cage 13 is gradually enlarged from outside to inside, so that the pressure reducing effect and the throttling expansion can be facilitated.
Preferably, a multi-layer valve cage 13 structure is adopted, the diameter of the second flow holes 131 of the valve cage 13 group is enlarged on the premise that the main structure and the functions of the valve cage 13 are not changed, the throttle layer of the valve cage 13 is increased, the flow cross section between the layers of the valve cage 13 is reduced, and the flow capacity of the valve is completed and ensured by increasing the flow quantity. The direct pressure difference between the front and the rear of the sealing pair can be reduced, so that the medium flow rate at the sealing pair is reduced.
Preferably, in the conventional regulating valve structure, under the condition of high pressure difference, the pressure difference can be rapidly reduced along with the increase of the valve opening, and the flow area is linearly increased along with the increase of the opening, so that the flow cannot be ensured to be linearly and positively correlated with the opening, and the operator cannot accurately control the flow according to the valve opening.
When the opening degree changes, the valve pressure difference is large, the flow rate changes rapidly, the integral adjusting capability is poor, cavitation is easier to generate at the outlet of the sealing pair, and the sealing surface is damaged.
Therefore, the second flow holes 131 are formed in the valve cage 13 from bottom to top in a form of increasing the number from bottom to top, decreasing the pressure difference, and increasing the flow area in an exponential manner when the opening of the valve is linearly increased.
Preferably, a sealing ring 164 is also fixed on the bottom surface of the valve core 16, and a plurality of input ports 165 are further provided at positions above the sealing ring 164, so as to ensure the circulation capability, so that the medium flows into the input ports 165 from the sealing pair, and flows out of the back pressure valve cage 122 from the input ports 165. The first flow hole 123 on the back pressure valve cage 122 is shielded by the position of the sealing ring 164, after the valve is opened, the second flow hole 131 and the first flow hole 123 are synchronously opened, so that the valve is ensured to have corresponding pressure maintaining effect on each opening degree, and even if the sealing capability of the sealing pair is reduced, the back pressure valve cage 122 can have a certain leakage preventing effect.
Two movable columns 162 which are symmetrically distributed are also fixed on the upper end surface of the valve core 16, the movable columns 162 completely penetrate through the valve cover 14 and are tightly attached to the two movable holes 141, a matching ring 163 is also fixed on the top of the two movable columns 162, threads are arranged in the matching ring 163 and are matched with the screw rod 15, and when the screw rod 15 rotates, the valve core 16 can be dragged to lift, so that the opening, closing and adjustment of the valve are realized.
Preferably, a screw rod seat 142 is further fixed in the middle of the valve cover 14, the screw rod seat 142 is columnar, and a limiting ring at the bottom of the screw rod 15 is clamped with the screw rod seat 142 to limit and support the screw rod seat 142. A bearing seat 143 is also fixed at the position where the end face of the valve cover 14 is adjacent to the edge, the motor seat 144 is cylindrical, the end face is closed, an observation opening is formed at the outer wall, and the other end of the screw rod 15 completely penetrates through the bearing seat 143 and is limited and supported by the end face of the bearing seat 143.
A motor seat 144 is also fixed at the end face of the receiving seat 143, slightly smaller than the receiving seat 143, and has a shape similar to the receiving seat 143, and is mainly used for fixing the motor 17.
Preferably, two symmetrically distributed transmission columns 151 are fixed on the outer wall of the upper end of the screw rod 15, and the transmission columns 151 can be connected with the overload prevention unit 2.
Preferably, two symmetrically distributed transmission blocks 171 are also fixed on the outer wall of the shaft end of the motor 17, and the transmission blocks 171 are semicircular and are also connected with the overload prevention unit 2.
When the back pressure valve cage is used, the shaft end of the motor 17 is connected with the upper end of the screw rod 15 through the coupler, the motor 17 drags the screw rod 15 to rotate and drives the valve core 16 to lift, meanwhile, a medium enters the valve cage 13 through the inlet 111, then enters the sealing ring 164 through the sealing pair, and finally flows out of the outlet 112 through the back pressure valve cage 122.
In summary, this design can reduce the pressure differential when the valve is opened, make the flow area increase rapidly through the distribution of second flow hole 131, and under the high pressure differential, pressure differential reduces rapidly along with the aperture change for final flow can be linear correlation with aperture change, make the governing valve under the condition of control aperture, can direct accurate regulation flow size, again because the setting of multilayer valve cage 13, can improve the aperture value of valve, avoided the valve to use under the condition of little aperture for a long time, bear most cavitation effect, reduced the direct infringement ability to the sealing pair of cavitation, improved the sealing ability and the life of governing valve.
Example 2
Referring to fig. 1 to 7, a second embodiment of the present invention is different from the first embodiment in that: the overload prevention unit 2 is respectively connected with the motor 17 and the screw rod 15 and comprises a transmission cylinder 21, a plurality of reset components 22 arranged on the outer wall of the transmission cylinder 21, a plurality of spring collision beads 23 arranged on the end face of the transmission cylinder 21 and an overload spring 24 arranged at the bottom of the transmission cylinder 21.
Further, the transmission cylinder 21 includes a receiving groove 211 disposed at an end surface thereof, a plurality of reset cavities 212 disposed inside a sidewall of the transmission cylinder 21, and a plurality of T-shaped grooves 213 penetrating an outer wall of the transmission cylinder 21;
The reset chamber 212 includes a first cylindrical chamber 2121 and a second cylindrical chamber 2122;
The T-slot 213 communicates with the reset chamber 212.
Further, the reset assembly 22 includes a first trigger post 221, a first spring 222 disposed on the post body of the first trigger post 221, a second trigger post 223 disposed inside the first trigger post 221, and a second spring 224 disposed on the bottom of the second trigger post 223.
Further, the first trigger post 221 includes a first sloped surface 2211 disposed at the bottom thereof, a cylinder 2212 disposed at the top of the first trigger post 221, and a third cylindrical cavity 2213 disposed inside the first trigger post 221.
Further, the second trigger post 223 includes a second inclined surface 2231 disposed at the top thereof, and a stopper 2232 disposed at the bottom of the second trigger post 223.
The transmission cylinder 21 is simultaneously sleeved on the upper end of the screw rod 15 and the shaft end of the motor 17. The transmission cylinder 21 is cylindrical, two ends are completely communicated, two containing grooves 211 which are symmetrically distributed are further formed in the upper end face of the transmission cylinder 21, and the containing grooves 211 are in an inverted trapezoid notch shape. Two T-shaped grooves 213 which are communicated and symmetrically distributed are also arranged at the lower position of the outer wall of the transmission cylinder 21. The size and position of the accommodating groove 211 are just aligned with the transmission block 171 and are mutually embedded; the T-shaped slot 213 is just penetrated by the driving post 151. The transmission column 151 is positioned at the bottommost end of the T-shaped groove 213 while the receiving groove 211 is engaged with the transmission block 171.
Two spring balls 23 which are symmetrically distributed are also fixed at the two sides of the opening of the accommodating groove 211, namely the upper end surface of the transmission cylinder 21, and total four spring balls are fixed. Two symmetrically distributed reset cavities 212 are also formed in the side wall of the transmission cylinder 21 at the two sides of the spring collision bead 23 and are used for accommodating the reset assembly 22, and the total number of the reset cavities is four.
Preferably, the reset cavity 212 is divided into two parts, namely a first cylindrical cavity 2121 and a second cylindrical cavity 2122, wherein the first cylindrical cavity 2121 penetrates through the upper end face of the transmission barrel 21 and is cylindrical, and the second cylindrical cavity 2122 is directly communicated with the transverse notch end of the T-shaped slot 213 and is prismatic. And thus reset cavities 212 are in communication at both ends of the transverse notch of each T-slot 213.
Preferably, the overload spring 24 is sleeved on the upper end shaft of the screw rod 15, one end of the overload spring contacts with the bottom of the transmission barrel 21, and the other end of the overload spring contacts with the upper end surface of the receiving seat 143, so that the transmission barrel 21 can be pushed towards the motor 17, and the transmission block 171 can be embedded into the accommodating groove 211. When the load of the screw 15 or the motor 17 is large, the overload spring 24 is compressed after exceeding the support threshold of the overload spring 24.
Preferably, the reset assembly 22 is comprised of two trigger posts and two springs. Specifically, the first trigger post 221 is sleeved inside the second cylindrical cavity 2122, the first trigger post 221 and the second cylindrical cavity 2122 are tightly attached and are both quadrangular, and the first trigger post 221 can move along the axial direction of the second cylindrical cavity 2122 and cannot rotate. The upper end surface of the first trigger post 221 is further fixed with a cylinder 2212, the cylinder 2212 extends into the first cylindrical cavity 2121, the first spring 222 is sleeved on the cylinder 2212, and two ends of the first spring 222 are respectively contacted with the bottom of the second cylindrical cavity 2122 and the upper end surface of the first trigger post 221, so that the first trigger post 221 can be pressed into the T-shaped groove 213.
The first trigger post 221 is internally provided with a third cylindrical cavity 2213, the third cylindrical cavity 2213 is also prismatic, and is tightly matched with a limiting block 2232 at the bottom of the second trigger post 223, and the second trigger post 223 penetrates through the cylinder 2212 and is close to the end surface of the transmission cylinder 21, but does not extend out.
The stopper 2232 and the third cylindrical cavity 2213 are also rectangular, and the second trigger post 223 can move along the axial direction of the third cylindrical cavity 2213 without rotating. The bottom of the limiting block 2232 is also provided with a second spring 224, and the other end of the second spring 224 is contacted with the bottom of the third columnar cavity 2213, so that the second trigger post 223 can be propped against the opening of the transmission cylinder 21.
Preferably, a first inclined surface 2211 is further disposed at the bottom of the first trigger post 221, and the first inclined surface 2211 faces one side of the longitudinal slot corresponding to the T-shaped slot 213, so that the first inclined surfaces 2211 at two lateral ends of the T-shaped slot 213 are distributed in opposite directions.
Preferably, the top of the second trigger post 223 is further provided with a second inclined plane 2231, and the two second inclined planes 2231 are different from the first inclined plane 2211 and are distributed in a back direction.
In use, the transmission cylinder 21 is propped against the shaft end of the motor 17 by the overload spring 24, the transmission block 171 is embedded into the accommodating groove 211, when the motor 17 is driven, the transmission block 171 is dragged to rotate, and the transmission column 151 penetrates into the longitudinal notch of the T-shaped groove 213, so that the screw rod 15 can normally rotate, and the regulating valve is opened and closed.
When the circuit problem exists, the motor 17 can be in misoperation or further rotate after the valve is opened and closed, so that the motor 17 is overloaded and damaged or the screw rod 15 is broken.
When this occurs, the screw 15 stops rotating, and the motor 17 is rotated, and the driving block 171 presses down the driving cylinder 21 through the inclined side wall of the receiving groove 211, and the overload spring 24 is compressed.
The driving block 171 then sweeps over each spring ball 23, and the spring balls 23 retract during the sweeping, and at this time, the driving column 151 is relatively moved to the position of the transverse notch of the T-shaped slot 213 by the lateral force of the spring balls 23 and the friction force of the end surface of the driving block 171, so that the driving column 21 is offset along the rotation direction of the motor 17 until the driving column 151 presses the first trigger column 221 at the corresponding position.
Under the action of the first inclined surface 2211, the first trigger post 221 moves upwards, and simultaneously drives the second trigger post 223 to move upwards, the second trigger post 223 extends out of the reset cavity 212, the second inclined surface 2231 faces the rotation direction of the driving block 171, and when the driving block 171 sweeps past, the second trigger post 223 retracts and then pops out. The load applied to the motor 17 at this time is much smaller than the load that the screw 15 is directly connected to but the screw cannot rotate, i.e., the motor 17 is in an idle state. The screw 15 and the motor 17 play a good role in protection.
When the screw rod is required to reversely rotate to open/close, the transmission block 171 rotates towards the reverse side of the second inclined surface 2231, directly pushes the vertical surface of the second trigger post 223, so that the transmission cylinder 21 reversely rotates until the vertical notch of the T-shaped groove 213 is re-matched with the transmission post 151, the transmission cylinder 21 is reset, the transmission block 171 is re-embedded into the accommodating groove 211, and the screw rod 15 is re-rotated, so that the opening/closing effect is achieved. At the same time, the first trigger post 221 is forced back after the reset of the actuator cylinder 21, retracting back into the reset chamber 212, where the actuator post 151 has been moved away from the first trigger post 221.
In summary, the design can enable the motor 17 and the screw rod 15 to continue rotating or misoperation under the condition that the valve is already opened and closed, so that the damage of the motor 17 and the screw rod is avoided; meanwhile, after the transmission is disconnected, the transmission can be rebuilt in time by reversing, and an overload prevention mechanism can not be triggered in the normal valve opening adjusting process, namely under the condition of no overload.
It is important that the foregoing detailed description of the present invention is that while the accompanying drawings and claims have been described in such detail as to illustrate the present invention, and not to limit the scope of the invention, it will be understood by those skilled in the art that the present invention can be modified and substituted for the same.
Claims (5)
1. A small-flow overload-prevention multi-valve cage regulating valve is characterized in that: comprising the steps of (a) a step of,
The valve body unit (1) comprises a valve shell (11), a valve seat (12) arranged in the valve shell (11), a plurality of valve cages (13) arranged at the upper end of the valve seat (12), a valve cover (14) arranged at the top of the valve cage (13), a screw rod (15) arranged at the center of the valve cover (14), a valve core (16) arranged in the middle of the valve seat (12) and a motor (17) arranged at the top of the valve cover (14);
The overload prevention unit (2) is respectively connected with the motor (17) and the screw rod (15) and comprises a transmission cylinder (21) sleeved at the upper end of the screw rod (15) and the shaft end of the motor (17), a reset assembly (22) arranged in a reset cavity in the side wall of the transmission cylinder (21), a plurality of spring collision beads (23) arranged on the end surface of the transmission cylinder (21) and an overload spring (24) arranged at the bottom of the transmission cylinder (21);
The screw rod (15) comprises a plurality of transmission columns (151) arranged on the outer wall of the end part of the screw rod;
The motor (17) comprises a plurality of semicircular transmission blocks (171) arranged on the outer wall of the shaft end of the motor;
The transmission cylinder (21) comprises an accommodating groove (211) which is arranged at the end face of the transmission cylinder and is in an inverted trapezoid notch shape, a plurality of T-shaped grooves (213) which are arranged on the outer wall of the transmission cylinder (21) in a penetrating way, and a reset cavity (212);
The reset cavities (212) are arranged on two sides of each accommodating groove (211); the reset cavity (212) is divided into a first columnar cavity (2121) and a second columnar cavity (2122), the first columnar cavity (2121) penetrates through the upper end face of the transmission barrel (21), and the second columnar cavity (2122) is directly communicated with the transverse notch end part of the T-shaped groove (213);
The reset assembly (22) comprises a first trigger column (221) and a second trigger column (223) arranged in a third columnar cavity (2213) formed in the upper end surface of the first trigger column (221); a cylinder (2212) is also fixed at the upper end surface of the first trigger column (221), and the cylinder (2212) stretches into the first columnar cavity (2121); the first spring (222) is sleeved on the cylinder (2212), and two ends of the first spring are respectively contacted with the bottom of the second cylindrical cavity (2122) and the upper end surface of the first trigger column (221); the second trigger column (223) penetrates through the cylinder (2212), a limiting block (2232) is arranged at the bottom of the second trigger column, a second spring (224) is arranged at the bottom of the limiting block (2232), and the other end of the second spring (224) is contacted with the bottom of the third columnar cavity (2213);
the first trigger post (221) comprises a first inclined surface (2211) arranged at the bottom of the first trigger post;
The second trigger post (223) includes a second sloped surface (2231) disposed at a top thereof; the second inclined surface (2231) and the first inclined surface (2211) are distributed in a back direction;
the transmission column (151) penetrates through the T-shaped groove (213); the transmission block (171) is embedded with the accommodating groove (211); the second trigger post (223) is sleeved inside the first trigger post (221);
The first inclined surface (2211) can be in contact with the transmission column (151); the second bevel (2231) can be in contact with the drive block (171).
2. The low flow overload prevention multi-cage regulator valve of claim 1, wherein:
The valve casing (11) comprises an inlet (111) and an outlet (112) which are arranged at two sides of the valve casing, a valve cavity (113) which is arranged at one side of the inlet (111), and a pressure maintaining cavity (114) which is arranged at one side of the outlet (112); -said inlet (111) is higher than said outlet (112);
The valve seat (12) comprises a first sealing surface (121) arranged at the opening of the valve seat, a back pressure valve cage (122) arranged at the bottom of the valve seat (12), and a plurality of first flow holes (123) penetrating through the outer wall of the back pressure valve cage (122); the back pressure valve cage (122) is sealed at the bottom;
the valve cage (13) comprises a plurality of second flow holes (131) penetrating through the surface of the valve cage; the number of the second flow holes (131) is increased from bottom to top, the pore diameter is increased from bottom to top, and the second flow holes are distributed in a spiral rising shape.
3. The low flow overload prevention multi-cage regulator valve of claim 2, wherein:
The valve cover (14) comprises a plurality of movable holes (141) which are formed in the end face of the valve cover in a penetrating mode, a screw rod seat (142) arranged at the top of the valve cover (14), a bearing seat (143) arranged around the screw rod seat (142), and a motor seat (144) arranged at the top of the bearing seat (143).
4. The low flow overload prevention multi-cage regulator valve of claim 3, wherein:
The valve core (16) comprises a second sealing surface (161) arranged on the outer wall of the valve core, a plurality of movable columns (162) arranged on the top of the valve core (16), a matching ring (163) arranged on the top of the movable columns (162), a sealing ring (164) arranged at the bottom of the valve core (16), and a plurality of input ports (165) penetrating through the outer wall of the sealing ring (164).
5. The low flow overload prevention multi-cage regulator valve of claim 4, wherein:
The T-shaped groove (213) is communicated with the reset cavity (212).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410568739.6A CN118149151B (en) | 2024-05-09 | 2024-05-09 | Small-flow overload-prevention multi-valve cage regulating valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410568739.6A CN118149151B (en) | 2024-05-09 | 2024-05-09 | Small-flow overload-prevention multi-valve cage regulating valve |
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| CN118149151A CN118149151A (en) | 2024-06-07 |
| CN118149151B true CN118149151B (en) | 2024-09-24 |
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| CN202410568739.6A Active CN118149151B (en) | 2024-05-09 | 2024-05-09 | Small-flow overload-prevention multi-valve cage regulating valve |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485283A (en) * | 2016-02-24 | 2016-04-13 | 南京康尼新能源汽车零部件有限公司 | Anti-overloading transmission device of power output shaft |
| CN111473156A (en) * | 2020-05-29 | 2020-07-31 | 亿川科技(成都)有限责任公司 | Small-flow large-pressure-difference regulating valve |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423469B (en) * | 2013-08-15 | 2015-09-30 | 合肥通用机械研究院 | High-pressure-difference gas-solid two-phase flow regulating valve |
| JP6218029B2 (en) * | 2013-11-29 | 2017-10-25 | 株式会社テージーケー | Stepping motor driven control valve |
| CN105333199A (en) * | 2015-11-06 | 2016-02-17 | 江门市宏乔新材料科技有限公司江海区分公司 | Gas bottle closing valve |
| CN209495017U (en) * | 2018-12-20 | 2019-10-15 | 浙江永盛科技股份有限公司 | A kind of turbine by-pass pressure reducing valve |
| DE102020124871A1 (en) * | 2019-12-04 | 2021-06-10 | ECO Holding 1 GmbH | Expansion valve |
| CN211624244U (en) * | 2020-01-22 | 2020-10-02 | 沈阳九和流体科技有限公司 | Micro-control combined regulating valve |
| CN112984004A (en) * | 2021-04-08 | 2021-06-18 | 上海驰助汽车零部件有限公司 | Bidirectional clutch and clutch system |
| CN116592155A (en) * | 2023-06-16 | 2023-08-15 | 华能海南发电股份有限公司海口电厂 | Low-pressure bypass regulating valve |
| CN116927895B (en) * | 2023-09-13 | 2023-12-08 | 华能济南黄台发电有限公司 | Zero-output input device for low-pressure cylinder of steam turbine |
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- 2024-05-09 CN CN202410568739.6A patent/CN118149151B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485283A (en) * | 2016-02-24 | 2016-04-13 | 南京康尼新能源汽车零部件有限公司 | Anti-overloading transmission device of power output shaft |
| CN111473156A (en) * | 2020-05-29 | 2020-07-31 | 亿川科技(成都)有限责任公司 | Small-flow large-pressure-difference regulating valve |
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| CN118149151A (en) | 2024-06-07 |
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