CN216788855U - Pressure limiting valve - Google Patents
Pressure limiting valve Download PDFInfo
- Publication number
- CN216788855U CN216788855U CN202220110072.1U CN202220110072U CN216788855U CN 216788855 U CN216788855 U CN 216788855U CN 202220110072 U CN202220110072 U CN 202220110072U CN 216788855 U CN216788855 U CN 216788855U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- valve body
- adjusting piece
- pressure limiting
- 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 provides a pressure limiting valve, which comprises a valve body, an adjusting piece, a spring, a pressure plate, a valve seat and a valve core, wherein the valve body is provided with a valve seat; the adjusting piece is connected to the top of the valve body in a threaded mode, and one end of the adjusting piece extends into the valve body; the spring, the pressure plate and the valve core are sequentially arranged in the valve body from top to bottom, one end of the spring is abutted against the adjusting piece, and the other end of the spring is abutted against the pressure plate; the valve seat is arranged at the bottom of the valve body, the valve core is arranged on the valve seat in a sliding manner, and one end of the valve core is abutted against the pressure plate; the valve seat is opened or closed through the sliding of the valve core, so that the pressure limiting valve is opened or closed. The safety margin of the pressure limiting valve can be adjusted according to different requirements.
Description
Technical Field
The utility model relates to a safety valve, in particular to a pressure limiting valve.
Background
The application of the pressure limiting valve in a high-pressure common rail system is embodied on a high-pressure oil rail and used for maintaining the oil pressure in the high-pressure oil rail; the high-pressure oil rail is sealed under the action of the spring force, and the pressure relief is started after the internal pressure of the high-pressure oil rail exceeds a pressure set value, so that the internal pressure of the high-pressure oil rail is rapidly reduced, the system safety is ensured, and the high-pressure oil rail is closed again when the internal pressure of the high-pressure oil rail is reduced to a lower limit value, and the system function is ensured.
The existing pressure limiting valve can not change a pressure set value, springs of various specifications need to be designed according to different requirements, the pressure limiting valve with different safety margins can be obtained, the manufacturing cost is high, and the application range is narrow.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the pressure limiting valve, which can adjust the safety margin of the pressure limiting valve according to the requirement, meet the requirement of no pressure set value and reduce the manufacturing cost. The technical scheme adopted by the utility model is as follows:
a pressure limiting valve comprises a valve body, an adjusting piece, a spring, a pressure plate, a valve seat and a valve core; the adjusting piece is connected to the top of the valve body in a threaded mode, and one end of the adjusting piece extends into the valve body; the spring, the pressure plate and the valve core are sequentially arranged in the valve body from top to bottom, one end of the spring is abutted against the adjusting piece, and the other end of the spring is abutted against the pressure plate; the valve seat is arranged at the bottom of the valve body, the valve core is arranged on the valve seat in a sliding manner, and one end of the valve core is abutted against the pressure plate; the valve seat is opened or closed through the sliding of the valve core, so that the pressure limiting valve is opened or closed.
Further, a valve cavity is arranged in the valve body, and the spring and the pressure plate are arranged in the valve cavity; the valve seat is provided with a valve port and an oil drainage hole from top to bottom, and the valve core is arranged in the valve port in a sliding manner;
when the valve core moves upwards, the oil drainage hole is opened and communicated with the valve cavity, and when the valve core moves downwards, the oil drainage hole is closed and is not communicated with the valve cavity.
Furthermore, at least one through hole is formed in the pressure plate and extends along the valve body; and/or a centering structure is arranged on the pressure plate, and the top of the valve core is arranged in the centering structure, so that the valve core is uniformly stressed.
Furthermore, a first oil return passage is arranged on the valve body and communicated with the valve cavity; and/or the presence of a gas in the gas,
and a second oil return passage is arranged on the adjusting piece and communicated with the valve cavity.
Furthermore, a first step is arranged on the inner wall of the valve body and can abut against the top of the pressing plate to limit the lift of the pressing plate.
Further, be equipped with the second step on the valve body inner wall, the second step can butt regulating part bottom to the maximum feed of restriction regulating part.
Furthermore, the adjusting piece is provided with a limiting opening, and the top of the spring is arranged in the limiting opening.
Further, threaded connection has the retaining member on the regulating part, the retaining member butt is in the valve body top.
Further, be equipped with the third step on the regulating part, the third step can with retaining member top butt to prevent that the retaining member from coming off.
Further, a sealing ring is arranged between the valve body and the adjusting piece.
The utility model has the advantages that:
the pre-compression amount of the spring is adjusted by adjusting the screwing depth of the adjusting piece into the valve body in a threaded connection mode of the adjusting piece and the valve body, so that the safety margin of the pressure limiting valve is changed, the requirement on the universality of the pressure limiting valve is met, the cost is reduced, and the application range is expanded;
the first oil return channel and the second oil return channel are used, so that the oil return function is integrated, an oil return path is increased, the overall structure of the pressure limiting valve is simple, and the space is saved;
the retaining member can lock the regulating part, improves the operating stability of regulating part.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a valve body, 2-an adjusting piece, 3-a spring, 4-a pressing plate, 5-a valve seat, 6-a valve core, 7-a locking piece, 8-a sealing piece, 101-a valve cavity, 102-a first oil return channel, 103-a first step, 104-a second step, 201-a second oil return channel, 202-a limiting port, 203-a third step, 401-a through hole, 501-a valve port and 502-an oil drain hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the present invention provides a pressure limiting valve, which includes a valve body 1, an adjusting member 2, a spring 3, a pressure plate 4, a valve seat 5 and a valve core 6; the adjusting piece 2 is connected to the top of the valve body 1 in a threaded mode, and one end of the adjusting piece 2 extends into the valve body 1; the spring 3, the pressure plate 4 and the valve core 6 are sequentially arranged in the valve body 1 from top to bottom, one end of the spring 3 is abutted against the adjusting piece 2, and the other end of the spring 3 is abutted against the pressure plate 4; the valve seat 5 is arranged at the bottom of the valve body 1, the valve core 6 is arranged on the valve seat 5 in a sliding manner, and one end of the valve core 6 is abutted against the pressure plate 4; the valve seat 5 is opened or closed by sliding of the valve element 6, thereby opening or closing the pressure limiting valve.
Preferably, the adjusting member 2 is a bolt; the pre-compression amount of the spring 3 is changed by rotating the bolt and changing the distance from the bolt to the pressure plate 4, so that the oil pressure of hydraulic oil in a high-pressure oil rail for jacking the valve core 6 is changed, and the purpose of adjusting the safety allowance of the pressure limiting valve is achieved; when the oil pressure in the high-pressure oil rail is larger than a pressure set value, the oil pressure pushes the valve core 6 to move upwards, the pressure limiting valve is opened to realize pressure relief, the pressure in the high-pressure oil rail is reduced, and when the pressure in the high-pressure oil rail is reduced to a lower limit value, the valve core 6 closes the pressure limiting valve again under the action of the elastic force of the spring to ensure the safe work of the high-pressure oil rail.
In the application, a valve cavity 101 is arranged in the valve body 1, and the spring 3 and the pressure plate 4 are arranged in the valve cavity 101; the valve seat 5 is provided with a valve port 501 and an oil drainage hole 502 from top to bottom, and the valve core 6 is arranged in the valve port 501 in a sliding manner; when the valve core 6 moves upwards, the oil drain hole 502 is opened and is communicated with the valve cavity 101, and when the valve core 6 moves downwards, the oil drain hole is closed and the oil drain hole 502 is not communicated with the valve cavity 101; preferably, in this embodiment, at least one oil drainage flat position is arranged on one side of the circumferential surface of the valve core 6 close to the oil drainage hole 502, and after the valve core 6 moves upward for a certain distance, the hydraulic oil in the oil drainage hole 502 enters the valve cavity 101 through the oil drainage flat position.
In the present application, the pressure plate 4 is provided with at least one through hole 401, and at least one through hole 401 extends along the valve body 1; preferably, the valve body 1 is in clearance fit with the pressure plate 4, so that the pressure plate 4 slides in the valve cavity 101 along a straight line, and hydraulic oil can pass through the through hole 401 on the pressure plate 4 without causing blockage of the hydraulic oil.
In the application, a centering structure is arranged on the pressure plate 4, and the top of the valve core 6 is arranged in the centering structure, so that the valve core 6 is stressed uniformly; preferably, the centering structure is an arc groove, and the center of the arc groove is located on the axis of the valve core 6, so that the valve core 6 is uniformly stressed.
In the present application, a first oil return passage 102 is provided on the valve body 1, and the first oil return passage 102 is communicated with the valve cavity 101; and/or a second oil return passage 201 is arranged on the adjusting piece 2, and the second oil return passage 201 is communicated with the valve cavity 101; through setting up first oil return passageway 102, second oil return passageway 201 and realizing the binary channels oil return, the alternative improves, according to operating mode and pipeline design requirement of difference, selects suitable oil return passageway, enlarges application scope.
In the application, a first step 103 is arranged on the inner wall of the valve body 1, and the first step 103 can abut against the top of the pressure plate 4 to limit the lift of the pressure plate 4; when the spool 6 lifts up the pressure plate 4 until the pressure plate 4 abuts the first land 103, it is the maximum opening amount of the pressure limiting valve.
In the application, a second step 104 is arranged on the inner wall of the valve body 1, and the second step 104 can abut against the bottom of the adjusting piece 2 to limit the maximum feeding amount of the adjusting piece 2; when the adjuster 2 is screwed into the valve body 1 until the adjuster 2 abuts against the second step 104, the compression amount of the spring 3 is maximized, and the oil pressure required for the upward movement of the spool 6 is also maximized, and at this time, the elastic force of the spring 3 is a maximum set value.
In order to limit the installation position of the spring 3 and facilitate the installation and positioning of the spring 3, a limiting opening 202 is formed in the adjusting part 2, and the top of the spring 3 is arranged in the limiting opening 202.
In order to further lock regulating part 2, avoid regulating part 2 to receive the oil pressure effect to accelerate not hard up, threaded connection has retaining member 7 on regulating part 2, retaining member 7 butt in 1 top of valve body.
Further, be equipped with third step 203 on the regulating part 2, third step 203 can with retaining member 7 top butt to prevent that retaining member 7 from coming off.
In order to prevent hydraulic oil from permeating into the threaded connection part of the valve body 1 and the adjusting piece 2 to cause leakage accidents, a sealing ring 8 is arranged between the valve body 1 and the adjusting piece 2.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A pressure limiting valve characterized by: comprises a valve body (1), an adjusting piece (2), a spring (3), a pressure plate (4), a valve seat (5) and a valve core (6); the adjusting piece (2) is connected to the top of the valve body (1) in a threaded mode, and one end of the adjusting piece (2) extends into the valve body (1); the spring (3), the pressure plate (4) and the valve core (6) are sequentially arranged in the valve body (1) from top to bottom, one end of the spring (3) is abutted to the adjusting piece (2), and the other end of the spring (3) is abutted to the pressure plate (4); the valve seat (5) is arranged at the bottom of the valve body (1), the valve core (6) is arranged on the valve seat (5) in a sliding manner, and one end of the valve core (6) is abutted against the pressure plate (4); the valve seat (5) is opened or closed through the sliding of the valve core (6), so that the pressure limiting valve is opened or closed.
2. The pressure limiting valve of claim 1, wherein: a valve cavity (101) is arranged in the valve body (1), and the spring (3) and the pressure plate (4) are arranged in the valve cavity (101); the valve seat (5) is provided with a valve port (501) and an oil drainage hole (502) from top to bottom, and the valve core (6) is arranged in the valve port (501) in a sliding manner;
when the valve core (6) moves upwards, the oil drainage hole (502) is opened, the oil drainage hole (502) is communicated with the valve cavity (101), and when the valve core (6) moves downwards, the oil drainage hole (502) is closed, and the oil drainage hole (502) is not communicated with the valve cavity (101).
3. The pressure limiting valve of claim 2, wherein: the pressure plate (4) is provided with at least one through hole (401), and the through hole (401) extends along the valve body (1); and/or a centering structure is arranged on the pressure plate (4), and the top of the valve core (6) is arranged in the centering structure, so that the valve core (6) is stressed uniformly.
4. The pressure limiting valve of claim 2, wherein: a first oil return passage (102) is arranged on the valve body (1), and the first oil return passage (102) is communicated with the valve cavity (101); and/or the presence of a gas in the gas,
and a second oil return passage (201) is arranged on the adjusting piece (2), and the second oil return passage (201) is communicated with the valve cavity (101).
5. The pressure limiting valve of any one of claims 1-4, wherein: the valve is characterized in that a first step (103) is arranged on the inner wall of the valve body (1), and the first step (103) can abut against the top of the pressing plate (4) to limit the lift of the pressing plate (4).
6. The pressure limiting valve of any one of claims 1-4, wherein: and a second step (104) is arranged on the inner wall of the valve body (1), and the second step (104) can abut against the bottom of the adjusting piece (2) to limit the maximum feeding amount of the adjusting piece (2).
7. The pressure limiting valve of any one of claims 1-4, wherein: the adjusting piece (2) is provided with a limiting opening (202), and the top of the spring (3) is arranged in the limiting opening (202).
8. The pressure limiting valve of any one of claims 1-4, wherein: threaded connection has retaining member (7) on regulating part (2), retaining member (7) butt in valve body (1) top.
9. The pressure limiting valve of claim 8, wherein: be equipped with third step (203) on regulating part (2), third step (203) can with retaining member (7) top butt to prevent that retaining member (7) from droing.
10. The pressure limiting valve of any one of claims 1-4, wherein: and a sealing ring (8) is arranged between the valve body (1) and the adjusting piece (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220110072.1U CN216788855U (en) | 2022-01-17 | 2022-01-17 | Pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220110072.1U CN216788855U (en) | 2022-01-17 | 2022-01-17 | Pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216788855U true CN216788855U (en) | 2022-06-21 |
Family
ID=82012995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220110072.1U Active CN216788855U (en) | 2022-01-17 | 2022-01-17 | Pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216788855U (en) |
-
2022
- 2022-01-17 CN CN202220110072.1U patent/CN216788855U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9249698B2 (en) | Compression relief brake reset mechanism | |
| US20090078225A1 (en) | Switchable rocker arm | |
| CN202252194U (en) | Overflow valve for excavator main control valve | |
| US20140230768A1 (en) | Lash adjuster | |
| JP2015535062A (en) | Valve device | |
| CN216788855U (en) | Pressure limiting valve | |
| CN113882820B (en) | Blowout prevention valve in drilling tool | |
| CN105402452A (en) | Pressure relief valve | |
| US11566544B2 (en) | Rocker arm assembly with lost motion spring | |
| CN110195574B (en) | Cylindrical back pressure valve | |
| US10378393B2 (en) | Cam follower assembly and method of manufacturing thereof | |
| CN113309897B (en) | Case buffer structure | |
| JPH08284620A (en) | Lash adjuster and internal combustion engine provided with it | |
| CN213575768U (en) | Pressure-adjustable high-pressure limiting valve for common rail | |
| CN205349901U (en) | Back pressure valve | |
| US20210079817A1 (en) | Latch pin for use in valve lifter and valve lifter | |
| CN112283421A (en) | Pressure-adjustable high-pressure limiting valve for common rail | |
| CN109026888B (en) | Rotary buffer valve | |
| CN212616537U (en) | Pressure reducing valve with built-in oil return one-way pressure stabilizing structure | |
| US8925523B2 (en) | Vented pressure relief valve for an internal combustion engine fuel system | |
| CN110715087B (en) | Low-pressure air-cut-off valve | |
| CN215762511U (en) | Novel one-way valve with sleeve valve structure | |
| CN211737622U (en) | Hydraulic throttle valve | |
| CN113090791A (en) | Novel safety valve capable of preventing premature ejaculation | |
| CN215371052U (en) | Self-sealing upper-assembling type double-gate-plate gate valve with pressure release valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |