CN108506541A - Pilot-operated type adjusting valve - Google Patents
Pilot-operated type adjusting valve Download PDFInfo
- Publication number
- CN108506541A CN108506541A CN201810533823.9A CN201810533823A CN108506541A CN 108506541 A CN108506541 A CN 108506541A CN 201810533823 A CN201810533823 A CN 201810533823A CN 108506541 A CN108506541 A CN 108506541A
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- China
- Prior art keywords
- valve
- pilot
- spool
- operated type
- core
- Prior art date
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- 238000007789 sealing Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 23
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000005303 weighing 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0426—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with seat protecting means
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0493—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with a spring other than a helicoidal spring
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
-
- 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
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
-
- 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)
- Fluid-Driven Valves (AREA)
Abstract
The present invention relates to regulating valve fields, more particularly to a kind of pilot-operated type adjusting valve, the pilot-operated type adjusting valve includes valve rod, valve deck, valve body, valve rod is movably installed on bonnet central, it is equipped with the inflow chamber separated by S type partition boards in valve body and flows out chamber, inflow intracavitary below valve deck is equipped with valve cage, valve cage is arranged on the platform among S type partition boards, a coaxial pilot-operated type core assembly is additionally provided with inside valve cage, pilot-operated type core assembly is connect with valve rod, and moved under the drive of valve rod, connection flows into chamber and outflow chamber.The lower sides of valve cage are equipped with multiple circumferentially distributed throttle orifices; the lower part of core assembly also is provided with multiple circumferentially distributed spool bores; the pilot-operated type adjusting valve of the present invention; the big flow pressure release under high temperature and high pressure condition not only may be implemented; the flow rate of fluid media (medium) disengaging spool can be adjusted simultaneously; sealing surface is protected, to meet the V grade seal requests under special operation condition.
Description
Technical field
The present invention relates to regulating valve fields, and in particular to a kind of pilot-operated type adjusting valve.
Background technology
The energy development of China is rapid, and almost in all industries and processing environment, high temperature and pressure belongs to a kind of pole
Operating mode is held, needs to handle with caution.Although considering a large amount of safety factor in storage container and pressure, valve can bear
Pressure still must not exceed the specified level of certain equipment.It, can be by relief valve come process container or pipeline in traditional sense
Interior pressure.Basic relief valve simple structure, particular value is adjusted to using variable spring-compressed by drain valve closure stress.But
Since the telescopic action of spring during use will produce different holding forces, this inadequate rigorous and scientific of processing.Meanwhile
Relief valve also external is limited by its：Pressure is higher, then spring is bigger；Spring is bigger, then valve body is bigger.And this make
The mode passively escaped with relief valve can not be solved the problems, such as fundamentally this.
In the modern industry environment developed rapidly at present, it is badly in need of providing more more options, this just makes pilot-operated type control valve answer
It transports and gives birth to.Pilot-operated type adjusting valve is small with its, compact-sized, sealing effect is good, cut-out ability is high, applied widely and make
It the features such as with long lifespan, is had been more and more widely used in automatic control system.Pilot-operated type adjusting valve is operated in high temperature height
It presses in operating mode, for common spool when in face of higher pressure and temperature, spool generates cavitation erosion, flash distillation now in switching process
As this is fatal for valve seal.Old-fashioned pilot valve can not balance front and back pressure difference, spool and its component well
It is not sufficiently stable at work, sealing cut-out effect is undesirable, and spool serious wear does not realize this kind of spy of high temperature and pressure thoroughly
The adjusting requirement of different operating mode.
Invention content
To solve the deficiencies in the prior art, the present invention provides a kind of pilot-operated type adjusting valve, it can be used for high temperature and pressure
Under large bore valves.
Technical solution provided by the present invention is as follows：
A kind of pilot-operated type adjusting valve, including valve rod, valve deck, valve body, the valve rod through the bonnet central and with it is described
Valve deck is slidably connected, and the valve deck and the valve body are bolted, and the stream separated by S type partition boards is equipped in the valve body
Enter chamber and outflow chamber, the inflow intracavitary below the valve deck is equipped with valve cage, and the valve cage is arranged among the S types partition board
Platform on, and the opening of the valve cage lower end be connected to the through-hole among S type partition boards become coaxial channel, in the valve cage
Inside is additionally provided with a coaxial pilot-operated type core assembly, and the pilot-operated type core assembly is connect with valve rod, and in the valve rod
Drive under, can be moved up and down in the coaxial channel.
Through the above technical solutions, the pilot-operated type adjusting valve under the action of implementation capacity, passes through valve rod band movable valve plug group
Part pressure release, pressure discharge operations are easy, and pilot-operated type adjusting valve is simple in construction, easy to disassemble and assemble.
Preferably, the pilot-operated type core assembly is bolted by spool gland and spool is constituted, in the spool
With small valve core is equipped in the cavity that is surrounded in the spool gland, the small valve core upper end is connect with threaded stem, the small valve
Core lower end forms with spool and seals, and the small valve core lower end is formed with folded spring room with spool, is provided in the folded spring room
Folded spring, the folded spring compression support the small valve core.
Through the above technical solutions, the pilot-operated type core assembly is based on pilot-operated type principle, it is the core component of valve,
Folded spring is in compressive state, and the support small valve core that can not only stablize protects sealing surface, returns small valve core and provides reaction force,
Smaller implementation capacity need to only be applied when small valve core being made to open, reduce energy consumption, it is easy to use.
Preferably, be equipped in the spool gland and the small valve core for fluid by balance hole.The balance
Hole constitutes fluid passage with spool valve seat, and for flowing in and out for fluid media (medium), while the balance hole is arranged in spool pressure
Inside lid and small valve core, space is also saved, the volume of valve is reduced.
Preferably, piston ring is equipped in the annular groove on the outside of the upper end of the spool, the middle part of the spool, which is equipped with, to be used for
The accommodating cavity of small valve core is installed, the lower part of the spool is hollow cylinder-like structure, and the cylinder-like structure center is equipped with
The leader channel being connected to accommodating cavity.
Through the above technical solutions, valve core structure is simple, the structure of spool lower cylindrical stretches into valve seat center, reduces
The side of spool is shaken, and to reduce the damage to linear sealing face, seal spool is made more to stablize.
Preferably, the barrel of the spool lower cylindrical structure is equipped with multiple spool bores, and the spool bore is along cylinder
Wall is in circumferentially distributed.The spool bore plays a part of adjusting fluid medium pressure, when pressure release fluid media (medium) dispersion pass through multiple
Spool bore, spool bore bear the major part of fluid media (medium) pressure, are reduced by the fluid medium pressure after spool bore so that
Cavitation erosion effect adjourns to aperture by valve seat, protects sealing surface, improves valve service life, the service life is poor up to ordinary high pressure
2~3 times of valve.
Preferably, the valve cage is fixedly connected to form by upper bush, sleeve, valve seat.Sleeve is fixed on valve seat, upper set
Cylinder is fixed on sleeve, and three components need to only position placement, and spool gland compresses upper bush, and with upper bush to be bolted.
The assembling of the valve cage is divided into three sections, and assembly method is simple, while convenient for the installation of pilot-operated type core assembly in valve cage.
Preferably, the upper bush and the piston ring form sealing, and are deposited between the upper bush and the piston ring
In gap.Upper bush and piston ring form sealing, make fluid media (medium) that can just pass through slowly piston ring and upper bush under stress
Between gap, enter in guide groove, while ensuring in this gap that flow of media ability is less than small valve core and spool lower end is opened
The negotiability of valve openings when opening.
Preferably, the sleeve be equipped with it is several for fluid by throttle orifice.The throttle orifice can make fluid be situated between
Matter reduces into fashionable pressure medium, reduces the impact force to the spool, to reduce the unilateral local failure to the valve seat
Effect reduces flow velocity, noise.
Preferably, the valve seat is formed with the spool and is sealed, and the valve seat is tied with the cylindric of the spool lower part
There are gaps between structure.There are gaps between valve seat and spool substructure, it is ensured that spool is in the channel at valve seat center
It is moved up and is moved down, realize closing or pressure release, while can be blocked up by the solid particle in fluid media (medium) to avoid the spool
Plug is convenient for the dismounting and replacement of trim.
Preferably, be equipped with sealing surface between the spool and the valve seat, the spool and the pilot-operated type small valve core it
Between be equipped with sealing surface, seal form is linear sealing.The sealing surface is spherical surface, is linear sealing.The sealing surface is by original
The faces R are made at 40 ° of angles into, are converted into linear sealing by original face sealing, in the case where power output is constant, sealing surface reduces, to reach
The effect sealed to V grades.
Preferably, the pilot-operated type small valve core constitutes pilot-operated type structure with the spool by folded spring and spool gland.
Folded spring serves when pilot-operated type small valve core pushes to be held out against, and the sealing of pilot-operated type small valve core is made to stablize, and reduces up-down vibration, protection
Sealing surface, while folded spring provides in pressure release the active force of driving pilot-operated type small valve core rising so that mechanism response speed
Soon.
Preferably, small valve core rises to the position for being close to spool gland under the drive of valve rod, below spool gland this
The inflow chamber, the valve cage, the spool gland, the small valve core, the leader channel, the stream in section stroke range
Go out chamber and forms fluid passage.Fluid media (medium) is logical at this time realizes small flow pressure release, Jie of last spool gland top and valve core inside
Matter back pressure reaches pressure balance.
Preferably, small valve core is moved up in the position for being close to spool gland, small valve core continuation under the drive of valve rod, guide
Formula core assembly is opened, and the inflow chamber, the valve cage, the leader channel, the outflow chamber form fluid passage.At this time
Fluid media (medium) forms big flow pressure release.
Compared with prior art, the present invention generated have the beneficial effect that：This pilot-operated type adjusting valve is completed to put down reliable
While the pressure task that weighs, also have the ability for the flow rate for adjusting medium disengaging spool, throttle orifice and spool on sleeve
The spool bore of lower end bears major part (about 60%) of the medium by pressure, can act on cavitation erosion and be adjourned to by valve seat
Aperture protects sealing surface, improves valve service life.It simultaneously can be by adjusting the quantity of throttle orifice and spool bore, position
And diameter, to reach the discharge characteristic of different demands.Due to the working method that pilot-operated type adjusting valve is stablized, sealing surface uses line
Sealing so that pilot-operated type adjusting valve can ensure V grades of sealings at high temperature under high pressure.
Description of the drawings
Fig. 1 is the general construction schematic diagram of the pilot-operated type adjusting valve of embodiment of the present invention.
Fig. 2 is the valve cage structure schematic diagram of the pilot-operated type adjusting valve of embodiment of the present invention.
Fig. 3 is that the odd number of the pilot-operated type adjusting valve of embodiment of the present invention folds the structural schematic diagram of spring.
Fig. 4 is that the odd number of the pilot-operated type adjusting valve of embodiment of the present invention folds the comparison structure schematic diagram of spring.
Fig. 5 is that the plural number of the pilot-operated type adjusting valve of embodiment of the present invention folds the structural schematic diagram of spring.
Fig. 6 is that the plural number of the pilot-operated type adjusting valve of embodiment of the present invention folds the comparison structure schematic diagram of spring.
In attached drawing 1,2,3,4,5,6, the structure list representated by each label is as follows：
1, valve rod, 2, valve deck, 3, valve body, 4, flow into chamber, 5, outflow chamber, 6, valve cage, 601, sleeve, 602, throttle orifice,
603, valve seat, 604, upper bush, 7, valve seat, 8, pilot-operated type core assembly, 801, cylinder-like structure, 802, spool bore, 803, valve
Core gland, 804, spool, 805, small valve core, 806, folded spring chamber, 807, folded spring, 808, annular groove, 809, piston ring, 810, hold
Set chamber, 811, leader channel, 9, guide sleeve, 10, guide groove, the 11, first balance hole, the 12, second balance hole.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to
The embodiment of attached drawing description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
As depicted in figs. 1 and 2, the pilot-operated type adjusting valve of embodiment of the present invention includes valve rod 1, valve deck 2, valve body 3, valve
Bar 1 is slidably connected through 2 center of valve deck and by guide sleeve 9 and the valve deck 2, and valve deck 2 and valve body 3 are bolted, valve
It is equipped with the inflow chamber 4 separated by S types partition board 301 in body 3 and flows out chamber 5, valve cage is equipped in the inflow chamber 4 immediately below valve deck 2
6, valve cage 6 is arranged on the platform among S types partition board 301, and the opening of 6 lower end of valve cage and the through-hole among S types partition board 301
Connection becomes coaxial channel 7, and a coaxial pilot-operated type core assembly 8, pilot-operated type core assembly 8 are additionally provided with inside valve cage 6
It connect, and under the drive of valve rod 1, can be moved up and down in coaxial channel 7 with valve rod 1.
Wherein, pilot-operated type core assembly 8 is bolted and is constituted by spool gland 803 and spool 804, in spool 804
With small valve core 805 is equipped in the cavity that is surrounded in spool gland 803,805 upper end of small valve core is threadedly coupled with valve rod 1, small valve core
805 lower ends form linear sealing with spool 804, and 805 lower end of small valve core is formed with folded spring room 806 with spool 804, in folded spring room
It is provided with folded spring 807 in 806, folds the compression support small valve core 805 of spring 807.
Specifically, valve cage 6 is fixedly connected to form by upper bush 604, sleeve 601, valve seat 603.
In an embodiment of the invention, when pilot-operated type adjusting valve is closed, valve rod 1 in the case where executing force effect to
It pushes so that small valve core 805 is formed with spool 804 and sealed, and spool 804 is formed with valve seat 603 and sealed.At this time fluid media (medium) from
It flows into chamber 4 by throttle orifice 602 to enter in valve cage 6, and guiding is entered by the gap between piston ring 809 and upper bush 604
In slot 10, fluid media (medium) continuation is entered along the first balance hole 11 and the second balance hole 12 in folded spring room 806.As fluid is situated between
Matter constantly pours in, and the back pressure above spool gland 803 increases, and small valve core and spool is made to close.Wherein spool 804 is by executing
Mechanism power output and medium back pressure are sealed with valve seat 603, small valve core 805 by actuator stem force and medium back pressure with
Spool 804 is sealed, and seal pressure is when closing
Q in formula0--- it must be than pressure, MPa
Q --- it is practical than pressure, MPa
Ko --- executing agency's diaphragm effective output pressure, MPa
Ae --- executing agency's effective diaphragm area, mm2
D --- spool is by pressure effective diameter, mm
Δ P --- close maximum differential pressure, MPa
dn--- valve-seat diameter, mm
bm--- sealing surface of seat effective width, mm
[q] --- spool and valve seat are allowable than pressure, MPa
In this way, when closing pilot-operated type adjusting valve, by the effect of throttle orifice 602, sleeve can be entered with dispersing fluid medium
To the impact force of spool 804 after 601, the sealing of spool 804 is set to stablize, and so that small valve core 805 is vibrated by folding the effect of spring 807
Reduce, the sealing of small valve core 805 is made to stablize.
In yet another embodiment of the present invention, when small valve core 805 moves up in the space below spool gland,
Executing agency's implementation capacity makes valve rod 1 to moving up with the help of folded spring driving force, and fluid media (medium) passes through pilot-operated type small valve core 805
Gap between spool 804 enters leader channel 811, constantly has fluid media (medium) through the first balance hole 11, the second balance hole 12
Enter leader channel 811 with folded spring room 806, since the negotiability of leader channel 811 is much larger than piston ring 809 and upper bush
The negotiability in gap between 604, the fluid media (medium) of 804 lower section of top and spool of spool gland 803 slowly form pressure and put down
Weighing apparatus.
In this way, small valve core 805 takes the lead in completing small flow pressure release, the pressure on pilot-operated type core assembly 8 reduces.
In yet another embodiment of the present invention, small valve core 805 rises to highest point, small valve core in accommodating cavity 810
805 fit closely with spool gland 803, continue light valve lifting stem 1 at this time, can open pilot-operated type core assembly 8, at this time largely
Fluid media (medium) directly by spool bore 802 enter outflow chamber 5, to complete pressure release.
In this way, pilot-operated type core assembly 8 completes big flow pressure release, flows into chamber 4 and outflow chamber 5 passes through the section on sleeve 601
Discharge orifice 602 is directly connected to the spool bore 802 on spool 804, and throttle orifice 602 and spool bore 802 can be used for adjusting fluid Jie
Matter flow rate, dispersing fluid medium enter the impact force of outflow chamber 5, reduce fluid media (medium) to spool 804 and valve seat 603
Unilateral local failure effect, protects sealing surface.
In one embodiment of the invention, folded spring 807 divides folds spring for the folded spring of odd number and plural number, and folding spring 807 need to be by correct
Method be mounted in folded spring room 806.Fig. 3 and Fig. 5 is respectively that odd number folds spring and the folded spring structure schematic diagram of plural number, either singly
The folded spring of number or the folded spring of plural number, folded spring 807 will make folded spring area big that one end when installing upward, make folded spring 807 as far as possible
The contact small valve core 805 of large area, to ensure to fold the firm support small valve core 805 of spring 807.It can so make folded spring 807 small
The good fluctuation for resisting fluid medium pressure when switching of spool 805；Fig. 4 and Fig. 6 illustrates the folded spring of odd number and the folded spring of plural number
Another structure, fold spring 807 and 805 contact point of small valve core it is smaller, can according to Fig. 4 and structure shown in fig. 6 and installation method
It can cause small valve core 805 in switching process, due to the vibration that media flow generates, disc spring 807 be caused to misplace, scratch is matched
Conjunction face influences valve seal performance and safety, should avoid using such folded spring structure and installation side as possible in practical application
Method.
In one embodiment of the invention, piston ring 9 is metallic piston ring.Piston ring 9 is made in addition to playing basic guiding
With also can ensure that the stabilization in gap between piston ring 9 and upper bush 604.The piston ring of common material, when using at high temperature
Can larger gap be set between upper bush and spool, be easy to cause gap negotiability herein and pilot-operated type small valve core is logical
The unmatched problem of road negotiability.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of pilot-operated type adjusting valve, including valve rod (1), valve deck (2), valve body (3), the valve rod (1) runs through the valve deck (2)
Center and be slidably connected with the valve deck (2), the valve deck (2) and the valve body (3) are detachably fixed connection, the valve body
(3) it is equipped with the inflow chamber (4) separated by S types partition board (301) in and flows out chamber (5), the inflow chamber below the valve deck (2)
(4) valve cage (6) is equipped in, valve cage (6) setting is on the intermediate platform of the S types partition board (301), and the valve cage (6)
The intermediate through-hole connection of the opening and S types partition board (301) of lower end becomes coaxial channel (7), is additionally provided with inside the valve cage (6)
One coaxial pilot-operated type core assembly (8), the pilot-operated type core assembly (8) connect with valve rod (1), and in the valve rod
(1) it is moved up and down in the coaxial channel (7) under drive；It is characterized in that：Band throttle orifice is provided on the valve cage (6)
(602) sleeve (601), pilot-operated type core assembly (8) lower end are provided with cylinder-like structure (801), the cylindric knot
Structure (801) is inserted into the intermediate coaxial channel (7) of the S types partition board (301), and the cylinder-like structure (801) side wall
It is provided with multiple spool bores (802).
2. pilot-operated type adjusting valve according to claim 1, it is characterised in that：The pilot-operated type core assembly (8) is by spool
Gland (803) is removably fixedly connected with composition with spool (804), in the spool (804) and the spool gland (803)
Small valve core (805) is equipped in the cavity surrounded, small valve core (805) upper end is removably fixedly connected with valve rod (1), described
Small valve core (805) lower end and spool (804) form linear sealing, and the small valve core (805) lower end be formed with spool (804) it is folded
Spring room (806), is provided with folded spring (807) in the folded spring room (806), and folded spring (807) compression supports the small valve core
(805)。
3. pilot-operated type adjusting valve according to claim 2, it is characterised in that：The spool gland (803) and the small valve
Be equipped in core (805) it is multiple using fluid by balance hole.
4. pilot-operated type adjusting valve according to claim 2, it is characterised in that：Ring on the outside of the upper end of the spool (804)
Piston ring (809) is equipped in shape slot (808), the middle part of the spool (804) is equipped with the accommodating cavity for installing small valve core (805)
(810), the lower part of the spool (804) is cylinder-like structure (801), and the cylinder-like structure side wall is provided with circumferentially distributed
Multiple spool bores (802), and the cylindrical structure (801) center is equipped with the leader channel that is connected to accommodating cavity (810)
(811)。
5. pilot-operated type adjusting valve according to claim 1, it is characterised in that：The valve cage (6) by top upper bush
(604), the sleeve (601) at middle part and the valve seat (603) of bottom are fixedly connected to form.
6. pilot-operated type adjusting valve according to claim 5, it is characterised in that：The upper bush (604) and the piston ring
(809) sealing is formed, and there are gaps between the upper bush (604) and the piston ring (809).
7. pilot-operated type adjusting valve according to claim 5, it is characterised in that：Sleeve (601) side wall is equipped with multiple
Circumferentially distributed throttle orifice (602).
8. pilot-operated type adjusting valve according to claim 5, it is characterised in that：The valve seat (603) and the spool (804)
Linear sealing is formed, and there are gaps between the valve seat (603) and the cylinder-like structure (801) of the spool (804) lower part.
9. pilot-operated type adjusting valve according to claim 4, it is characterised in that：The valve rod (1) drives the small valve core
(805) be moved upward to and be close to spool gland (803), the inflow chamber (4), the valve cage (6), the spool gland (803),
The small valve core (805), the leader channel (811), the outflow chamber (5) form access.
10. pilot-operated type adjusting valve according to claim 4, it is characterised in that：The small valve core (805) is close to the spool
Gland (803), the valve rod (1) drive the pilot-operated type core assembly (8) to move up, the inflow chamber (4), the valve cage
(6), the leader channel (811), the outflow chamber (5) form access.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533823.9A CN108506541A (en) | 2018-05-29 | 2018-05-29 | Pilot-operated type adjusting valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533823.9A CN108506541A (en) | 2018-05-29 | 2018-05-29 | Pilot-operated type adjusting valve |
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| Publication Number | Publication Date |
|---|---|
| CN108506541A true CN108506541A (en) | 2018-09-07 |
Family
ID=63402002
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810533823.9A Pending CN108506541A (en) | 2018-05-29 | 2018-05-29 | Pilot-operated type adjusting valve |
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| Country | Link |
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| CN (1) | CN108506541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135686A (en) * | 2021-12-09 | 2022-03-04 | 温州芝寰流体技术有限公司 | Plunger type porous decompression flash valve |
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| CN205689765U (en) * | 2016-03-02 | 2016-11-16 | 田春霞 | A kind of spool, valve and reducing-and-cooling plant |
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| GB840690A (en) * | 1955-09-22 | 1960-07-06 | Licentia Gmbh | Valve, particularly pressure-relieved steam valve |
| JPH06193753A (en) * | 1992-12-24 | 1994-07-15 | Tokimec Inc | Pilot operating type relief valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114135686A (en) * | 2021-12-09 | 2022-03-04 | 温州芝寰流体技术有限公司 | Plunger type porous decompression flash valve |
| CN114135686B (en) * | 2021-12-09 | 2023-08-25 | 浙江芝寰流体技术有限公司 | Plunger type porous pressure-reducing flash valve |
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