CN216158387U - Multifunctional overflow valve - Google Patents
Multifunctional overflow valve Download PDFInfo
- Publication number
- CN216158387U CN216158387U CN202122206983.2U CN202122206983U CN216158387U CN 216158387 U CN216158387 U CN 216158387U CN 202122206983 U CN202122206983 U CN 202122206983U CN 216158387 U CN216158387 U CN 216158387U
- Authority
- CN
- China
- Prior art keywords
- hole
- valve
- section
- mounting hole
- stepped mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model relates to a hydraulic element, in particular to a multifunctional overflow valve, which comprises a valve body, wherein two stepped mounting holes are oppositely formed in the valve body, and each stepped mounting hole is internally and sequentially provided with the following components from inside to outside: the valve comprises a valve seat, a valve sleeve, a valve core, a spring seat, a spring, a buffer valve sleeve, a plug, a pressurizing piston and an adjusting screw, wherein a first oil port and a second oil port are formed in the valve body, the first oil port is communicated with a valve seat cavity in one stepped mounting hole and a radial hole in the other stepped mounting hole, and the second oil port is communicated with the radial hole in the one stepped mounting hole and a valve seat cavity in the other stepped mounting hole. The overflow valve not only has the overflow function, but also has the functions of throttling buffering and being used as a safety valve, the once opening pressure is adjustable, and the buffering pressure and the buffering time can be realized by adjusting the size of the throttling hole and the length between the buffering areas.
Description
Technical Field
The utility model relates to a hydraulic element, in particular to a multifunctional overflow valve.
Background
In a hydraulic drive traveling device, in order to prevent the service life of a traveling machine from being affected by pressure overload during traveling of a hydraulic motor, an overflow valve is generally provided to protect the traveling device. The existing overflow valve only has a pressure relief function for preventing equipment from being overloaded when the set pressure is exceeded, but has no buffer function. In this way, when the walking equipment is started or stopped, although the overflow valve prevents the pressure from being too high, the pressure rises too fast, and the impact is too large, so that the walking device is blocked, and the use feeling of a client is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a multifunctional overflow valve which can adjust the buffer pressure and the buffer time according to the working environment of the walking machine and the use feeling of customers, and therefore, the utility model adopts the technical scheme that:
the utility model provides a multifunctional overflow valve, includes the valve body, is different with prior art, and two cascaded mounting holes are established relatively on the valve body, in every cascaded mounting hole, set gradually from inside to outside:
the valve seat is integrally cylindrical, the inner end face of the valve seat is abutted against the bottom wall of the stepped mounting hole, the outer end face of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole;
the valve sleeve comprises a valve sleeve, an inner cavity and a valve seat, wherein the inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat, and the peripheral surface of the rest part of the inner section hole is provided with a radial hole; valve sleeve throttling holes are formed in the outer section holes along the radial direction;
the valve core comprises an inner section frustum, a middle section large circular truncated cone and an outer section small circular truncated cone, wherein part of the inner section frustum enters the valve seat, the conical surface of the inner section frustum and the concave conical surface of the valve seat form conical surface sealing, the rest part in the valve seat forms a valve seat cavity, the middle section large circular truncated cone and the middle section hole of the valve sleeve form sliding sealing, and the length of the middle section large circular truncated cone is greater than that of the middle section hole of the valve sleeve; a valve core throttling hole is formed along the axial direction;
the spring seat is sleeved on the small round table of the valve core, is positioned in the outer section hole of the valve sleeve and is provided with a spring seat throttling hole along the axial direction;
the spring is partially positioned in the outer section hole of the valve sleeve, and the inner end of the spring is abutted against the spring seat;
the buffer valve sleeve is sleeved on the valve sleeve and forms sliding seal with the valve sleeve and the stepped mounting hole respectively;
the plug comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, wherein the large-hole inner section is in interference fit with the valve sleeve, and the outer part of the large-hole inner section is in threaded connection with the stepped mounting hole;
the pressurizing piston is positioned in the middle section of the plug small hole and forms sliding seal with the plug small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring;
the adjusting screw is in threaded connection with the outer section of the screw hole of the plug, and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston;
the valve body is provided with a first oil port and a second oil port, the first oil port is communicated with a valve seat cavity in one stepped mounting hole and a radial hole in the other stepped mounting hole, and the second oil port is communicated with the radial hole in the one stepped mounting hole and the valve seat cavity in the other stepped mounting hole.
Further, the adjusting device also comprises a locking nut which is in threaded connection with the adjusting screw.
Furthermore, the valve seat and the stepped mounting hole, the buffer valve sleeve and the valve sleeve are sealed through a check ring and an O-shaped ring, and the pressurizing piston and the small-hole middle section of the plug, the plug and the stepped mounting hole are sealed through the O-shaped ring.
Compared with the prior art, the utility model not only has the overflow function, but also has the functions of throttling buffering and being used as a safety valve, the one-time opening pressure is adjustable, and the buffering pressure and the buffering time can be realized by adjusting the size of the throttling hole and the length of the buffering area.
Drawings
Fig. 1 is a schematic structural diagram of a valve body in an embodiment.
Fig. 2 is a schematic structural diagram of the multifunctional overflow valve in one state in the embodiment.
Fig. 3 is a schematic structural diagram of the multifunctional overflow valve in another state in the specific embodiment.
Fig. 4 is an enlarged view of the structure of the multifunctional overflow valve section part in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. While the terms "left", "right", "inside", "outside", etc., used in the embodiments indicate orientations or positional relationships based only on the orientations or positional relationships shown in the drawings, "a" and "two" are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, a rear flange of a hydraulic motor is also used as a valve body 100 of the multifunctional overflow valve, two stepped mounting holes 101 are oppositely formed in the valve body 100, and each stepped mounting hole 101 is sequentially formed from inside to outside:
the valve seat 10 is integrally cylindrical, the inner end surface of the valve seat is abutted to the bottom wall of the stepped mounting hole 101, the outer end surface of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole 101;
the valve sleeve 8 is characterized in that an inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat 10, and the circumferential surface of the rest part of the inner section hole is provided with a radial hole W; a valve sleeve throttling hole Z is formed in the outer section hole along the radial direction;
the valve core 9 comprises an inner section frustum, a middle section large frustum and an outer section small frustum, wherein part of the inner section frustum enters the valve seat 10, the conical surface of the inner section frustum and the concave conical surface of the valve seat 10 form conical surface sealing, the rest part in the valve seat 10 forms a valve seat cavity F, the middle section large frustum and the middle section hole of the valve sleeve 8 form sliding sealing, and the length of the middle section large frustum is larger than that of the middle section hole of the valve sleeve 8; a valve core throttling hole X is formed along the axial direction;
the spring seat 7 is sleeved on the small round table of the valve core 9, is positioned in the outer section hole of the valve sleeve 8, and is provided with a spring seat throttling hole Y along the axial direction;
the spring 6 is partially positioned in the outer section hole of the valve sleeve 8, and the inner end of the spring 6 is abutted against the spring seat 7;
the buffer valve sleeve 5 is sleeved on the valve sleeve 8 and forms sliding seal with the valve sleeve 8 and the stepped mounting hole 101 respectively;
the plug 4 comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, wherein the large-hole inner section is in interference fit with the valve sleeve 8 and is externally screwed with the stepped mounting hole 101;
the pressurizing piston 3 is positioned in the middle section of the small hole of the plug 4 and forms sliding seal with the small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring 6;
the adjusting screw 1 is in threaded connection with the outer section of the screw hole of the plug 4, and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston 3;
the valve body 100 is provided with a first oil port A and a second oil port B, the first oil port A is communicated with a valve seat cavity F in one stepped mounting hole 101 and a radial hole W in the other stepped mounting hole 101, and the second oil port B is communicated with the radial hole W in the one stepped mounting hole 101 and the valve seat cavity F in the other stepped mounting hole 101.
The adjusting device also comprises a locking nut 2, wherein the locking nut 2 is in threaded connection with the adjusting screw 1.
The valve seat 10 and the stepped mounting hole 101, the buffer valve sleeve 5 and the valve sleeve 8 are sealed through check rings and O-shaped rings, and the pressurizing piston 3 and the small-hole middle section of the plug 4, and the O-shaped rings between the plug 4 and the stepped mounting hole 101 are sealed.
The adjusting screw 1 is in threaded connection with the plug 4 to adjust the precompression amount of an inner spring of the overflow valve, and is also the key for setting the pressure of the overflow valve, and after the adjusting screw is set, the locking nut is used for preventing looseness. The overflow valve is provided with three throttling holes which respectively comprise a valve core throttling hole X, a spring seat throttling hole Y and a valve sleeve throttling hole Z.
The working process of the present invention will be described below by taking the example that the traveling machine advances, and the traveling motor returns oil from the first oil port a and returns oil from the second oil port B.
When the oil inlet pressure of the first oil port A is smaller than the primary opening pressure of the overflow valves, the left overflow valve and the right overflow valves do not act. The primary opening pressure is the pressure of the high-pressure oil pushing the valve core to overcome the spring force.
As shown in fig. 2-4: when the oil inlet pressure of the first oil port A is larger than the primary opening pressure of the overflow valve, the valve core of the overflow valve on the right side is opened, and part of high-pressure oil enters the second oil port B through the radial hole W. Meanwhile, high-pressure oil enters the inner cavity of the valve sleeve through the valve core throttling hole X and the spring seat throttling hole Y, the overflow valve has a closing trend due to the area difference of two ends of the valve core, however, as the flow of the first oil port A continues to increase, when the valve core continues to be opened, the high-pressure oil in the valve sleeve cavity pushes the buffer valve sleeve 5 from the rightmost end to the leftmost end through the valve sleeve throttling hole Z, the pressure of the first oil port A in the process is basically kept unchanged, the process is called as the buffering effect of the overflow valve, the overflow valve serves as the buffer valve at the moment, and the buffering time is the time that the high-pressure oil enters the inner cavity of the valve sleeve through the valve core throttling hole X and the spring seat throttling hole Y, the time that the buffer valve sleeve is pushed to move to the limit position through the valve sleeve throttling hole Z, and the time that the pressure difference is balanced when the high-pressure oil is decompressed in the cavity. Therefore, the adjustment of the buffer pressure and the buffer time can be realized by adjusting the size of the throttling hole and the length of the buffer area, and the adjustable buffer function is realized. When the overflow valve reaches the set pressure, the valve core is completely opened, the overflow valve overflows, and the overflow valve serves as a safety valve.
The primary opening pressure is defined as the pressure of high-pressure oil pushing the valve core to overcome the spring force; the set pressure of the relief valve is defined as the pressure at which the relief valve completely overflows.
When the walking machine retreats, the hydraulic motor enters oil from the second oil port B and returns oil from the first oil port A, the working process is similar to the process, and the description is omitted.
Finally, the description is as follows: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (3)
1. The utility model provides a multi-functional overflow valve, includes valve body (100), its characterized in that, two cascaded mounting hole (101) are established relatively on valve body (100), in every cascaded mounting hole (101), set gradually from inside to outside:
the valve seat (10) is integrally cylindrical, the inner end face of the valve seat is abutted to the bottom wall of the stepped mounting hole (101), the outer end face of the valve seat is provided with a concave conical surface, and the peripheral surface of the valve seat is in sealing fit with the stepped mounting hole (101);
the valve sleeve (8) is characterized in that an inner cavity is divided into an inner section hole, a middle section hole and an outer section hole, the diameter of the middle section hole is the smallest, one part of the inner section hole is sleeved on the valve seat (10), and the circumferential surface of the rest part of the inner section hole is provided with a radial hole (W); a valve sleeve throttling hole (Z) is formed in the outer section hole along the radial direction;
the valve core (9) comprises an inner section frustum, a middle section large frustum and an outer section small frustum, wherein part of the inner section frustum enters the valve seat (10), the conical surface of the inner section frustum and the concave conical surface of the valve seat (10) form conical surface sealing, the rest part in the valve seat (10) forms a valve seat cavity (F), the middle section large frustum and the middle section hole of the valve sleeve (8) form sliding sealing, and the length of the middle section large frustum is greater than that of the middle section hole of the valve sleeve (8); a valve core throttling hole (X) is formed along the axial direction;
the spring seat (7) is sleeved on the small round table of the valve core (9), is positioned in the outer section hole of the valve sleeve (8), and is provided with a spring seat throttling hole (Y) along the axial direction;
the spring (6) is partially positioned in the outer section hole of the valve sleeve (8), and the inner end of the spring is abutted against the spring seat (7);
the buffer valve sleeve (5) is sleeved on the valve sleeve (8) and forms sliding seal with the valve sleeve (8) and the stepped mounting hole (101) respectively;
the plug (4) comprises a large-hole inner section, a small-hole middle section and a screw hole outer section, the large-hole inner section is in interference fit with the valve sleeve (8), and the outer part of the large-hole inner section is in threaded connection with the stepped mounting hole (101);
the pressurizing piston (3) is positioned in the middle section of the small hole of the plug (4) and forms sliding seal with the small hole, and the inner end of the pressurizing piston is abutted against the outer end of the spring (6);
the adjusting screw (1) is in threaded connection with the outer section of the screw hole of the plug (4), and the inner end of the adjusting screw is abutted against the outer end of the pressurizing piston (3);
a first oil port (A) and a second oil port (B) are formed in the valve body (100), the first oil port (A) is communicated with a valve seat cavity (F) in one stepped mounting hole (101) and a radial hole (W) in the other stepped mounting hole (101), and the second oil port (B) is communicated with the radial hole (W) in the one stepped mounting hole (101) and the valve seat cavity (F) in the other stepped mounting hole (101).
2. The multifunctional overflow valve is characterized by further comprising a locking nut (2), wherein the locking nut (2) is in threaded connection with the adjusting screw (1).
3. The multifunctional overflow valve as claimed in claim 1, wherein the valve seat (10) and the stepped mounting hole (101) and the buffer valve sleeve (5) and the valve sleeve (8) are sealed by check rings and O-rings, and the pressurizing piston (3) and the small-hole middle section of the plug (4) and the O-rings between the plug (4) and the stepped mounting hole (101) are sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122206983.2U CN216158387U (en) | 2021-09-13 | 2021-09-13 | Multifunctional overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122206983.2U CN216158387U (en) | 2021-09-13 | 2021-09-13 | Multifunctional overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216158387U true CN216158387U (en) | 2022-04-01 |
Family
ID=80849090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122206983.2U Active CN216158387U (en) | 2021-09-13 | 2021-09-13 | Multifunctional overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216158387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915183A (en) * | 2021-09-13 | 2022-01-11 | 烟台艾迪液压科技有限公司 | Overflow valve with adjustable buffer function |
-
2021
- 2021-09-13 CN CN202122206983.2U patent/CN216158387U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915183A (en) * | 2021-09-13 | 2022-01-11 | 烟台艾迪液压科技有限公司 | Overflow valve with adjustable buffer function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105909583B (en) | Buffer relief valve and hydraulic system | |
| TWI535960B (en) | Regulator valve | |
| CN201748005U (en) | Sectional overflow valve | |
| CN216158387U (en) | Multifunctional overflow valve | |
| CN110131477B (en) | Multistage throttle labyrinth relief pressure valve | |
| CN113915183A (en) | Overflow valve with adjustable buffer function | |
| CN201753790U (en) | Safety valve for multi-way valve | |
| US4034776A (en) | Balanced plug valve | |
| CN103291679A (en) | Low-hysteresis overflow valve | |
| CN104315155A (en) | Improvement method for internal bypass structure of cut-off valve | |
| CN205371728U (en) | Quick off -load relief valve | |
| CN209321212U (en) | The bidirectional locking arrangement of controllable pitch propeller of low hydraulic shock | |
| EP1030086B1 (en) | Safety valve assembly | |
| CN108278234B (en) | Plug-in rotary buffer valve | |
| CN111188800A (en) | Differential pressure precision adjusting device of propeller speed regulator | |
| CN110375098B (en) | Adjustable integrated safety valve type pressure reducer | |
| CN113719656B (en) | Follow-up valve core assembly, direct-acting overflow valve and pilot-operated overflow valve | |
| CN111306123B (en) | Damping type safety overflow valve capable of self-aligning | |
| CN212616537U (en) | Pressure reducing valve with built-in oil return one-way pressure stabilizing structure | |
| CN212455021U (en) | Differential pressure precision adjusting device of propeller speed regulator | |
| CN105570502A (en) | Fast unloading safety valve | |
| CN208519077U (en) | A kind of safety coupling | |
| CN100595458C (en) | Shuttle type difference decompression valve | |
| CN207749117U (en) | A kind of cell breaking plant explosion-protection equipment | |
| CN220769832U (en) | Direct-acting low-pressure overflow valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |