CN219975509U - Plate-type pressure limiting valve - Google Patents
Plate-type pressure limiting valve Download PDFInfo
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- CN219975509U CN219975509U CN202321252395.5U CN202321252395U CN219975509U CN 219975509 U CN219975509 U CN 219975509U CN 202321252395 U CN202321252395 U CN 202321252395U CN 219975509 U CN219975509 U CN 219975509U
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- piston
- valve body
- valve
- pressure limiting
- spring
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- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to the field of pressure limiting valves and discloses a plate type pressure limiting valve, which comprises a valve body (1), wherein a piston valve rod (2) is arranged in the valve body (1), the piston valve rod (2) comprises an upper piston (21), and the upper piston (21) is in contact fit with the inner wall of the valve body (1); still include big spring (3), the upper and lower both ends of big spring (3) respectively with plug valve pole (2) lower part and valve body (1) inner wall contact, valve body (1) still installs little spring (4) and little spring holder (41) that are located last piston (21) top, and little spring holder (41) receive the effort of little spring (4) to promote downwards and sealing fit in the up end of piston valve pole (2), are equipped with in piston valve pole (2) and give vent to anger passageway (20). The utility model has small installation space, and is particularly suitable for occasions with compact structure and high requirements; the disassembly is convenient, and the oil way assembly is stable; the gas floating structure is adopted, the guiding is stable, and the operation is smooth.
Description
Technical Field
The utility model relates to the technical field of pressure limiting valves, in particular to a plate type pressure limiting valve.
Background
The pressure limiting valve is a component for limiting the pressure in a pipeline and equipment, is widely applied to a vehicle control system, and comprises an air inlet and an air outlet, wherein the air inlet and the air outlet are connected by adopting a connector, so that the occupied space is large, and the assembly is difficult at some places with small space. The valve opening and guiding of the original pressure limiting valve are unstable, and the phenomenon of poor sealing and air leakage of the valve is easily caused.
At present, the patent number 201610284492.0 has the defects of unreasonable structure, easy occurrence of blocking during operation and the like.
Disclosure of Invention
The utility model provides a plate-type pressure limiting valve aiming at the defects in the prior art.
In order to solve the technical problems, the utility model is solved by the following technical scheme:
the plate-type pressure limiting valve comprises a valve body, an air inlet and an air outlet are formed in the valve body, a piston valve rod is installed in the valve body, the piston valve rod comprises an upper piston, the upper piston is in contact fit with the inner wall of the valve body, and the inner cavity of the valve body is divided into an air inlet cavity and an air outlet cavity which are respectively communicated with the air inlet and the air outlet; the valve body is further provided with a small spring and a small spring seat which are positioned above the upper piston, the small spring seat is pushed downwards by the acting force of the small spring and is in sealing fit with the upper end face of the piston valve rod, an air outlet channel is arranged in the piston valve rod, the upper opening of the air outlet channel is matched with the small spring seat, and the lower opening of the air outlet channel is communicated with the outside atmosphere.
Preferably, the valve body is internally provided with a mounting hole, the piston valve rod is in clearance fit with the mounting hole and moves up and down along the mounting hole, the piston valve rod further comprises a lower piston, the lower piston is positioned below the mounting hole and is in contact fit with the inner wall of the valve body, and the upper piston is positioned above the mounting hole.
Preferably, the upper part of the valve body is fixedly provided with an end cover, the end cover is in sealing fit with the valve body through an end cover sealing ring, the lower surface of the end cover is provided with a mounting groove, and the small spring seat are mounted in the mounting groove and move up and down.
Preferably, a small spring sealing ring is arranged on the lower end face of the small spring seat, and the small spring sealing ring is in sealing fit with the edge of the upper opening of the air outlet channel.
Preferably, an upper sealing ring is arranged on the upper piston, and the upper sealing ring and the inner wall of the valve body form a ventilation channel wall surface in sealing fit.
Preferably, the side wall of the lower piston is provided with a lower sealing ring, and the lower sealing ring is in sealing fit with the inner wall of the lower part of the valve body.
Preferably, the lower end of the lower piston is provided with a positioning boss, and the large spring is matched with the positioning boss.
Preferably, the lower part of the valve body is also fixedly provided with a mounting sleeve, and the large spring is arranged in the mounting sleeve.
Preferably, the lower end of the mounting sleeve is provided with a threaded hole, the mounting sleeve further comprises an adjusting screw, the adjusting screw extends into the mounting sleeve upwards through the threaded hole, the upper end of the adjusting screw is provided with a mounting seat, and the lower end of the large spring is in contact fit with the mounting seat.
Preferably, the valve body is also provided with an air inlet plug communicated with the air inlet cavity, and the valve body is also provided with an air outlet plug communicated with the air outlet cavity.
The utility model has the remarkable technical effects due to the adoption of the technical scheme: the utility model has small installation space, and is particularly suitable for occasions with compact structure and high requirements; the disassembly is convenient, and the oil way assembly is stable; the piston adopts a floating end face and radial guide, and the valve port is opened and closed stably; the oil way is communicated with the gas circuit board, so that the structure is compact, and the integration of each system is easy to realize; the gas floating structure is adopted, the guiding is stable, and the operation is smooth.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a schematic illustration of part of the utility model.
FIG. 3 is a schematic diagram II of a portion of the utility model.
The names of the parts indicated by the numerical references in the drawings are as follows: 1-valve body, 2-piston valve rod, 3-big spring, 4-little spring, 5-end cover, 6-adjusting screw, 101-air inlet chamber, 102-air outlet chamber, 11-air inlet, 12-air outlet, 13-mounting hole, 14-mounting sleeve, 15-air inlet plug, 16-air outlet plug, 20-air outlet channel, 21-upper piston, 22-lower piston, 211-upper sealing ring, 221-lower sealing ring, 222-positioning boss, 41-little spring seat, 42-little spring sealing ring, 51-sealing ring, 52-mounting groove, 61-mounting seat.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings and examples.
Example 1
The plate-type pressure limiting valve comprises a valve body 1, an air inlet 11 and an air outlet 12 are formed in the valve body 1, a piston valve rod 2 is arranged in the valve body 1, the piston valve rod 2 comprises an upper piston 21, and the upper piston 21 is in contact fit with the inner wall of the valve body 1 and divides the inner cavity of the valve body into an air inlet cavity 101 and an air outlet cavity 102 which are respectively communicated with the air inlet 11 and the air outlet 12; the valve body 1 is further provided with a small spring 4 and a small spring seat 41 which are positioned above the upper piston 21, the small spring seat 41 is pushed downwards by the acting force of the small spring 4 and is in sealing fit with the upper end face of the piston valve rod 2, an air outlet channel 20 is arranged in the piston valve rod 2, the upper opening of the air outlet channel 20 is matched with the small spring seat 41, and the lower opening of the air outlet channel 20 is communicated with the outside atmosphere.
The valve body 1 is internally provided with a mounting hole 13, the piston valve rod 2 is in clearance fit with the mounting hole 13 and moves up and down along the mounting hole 13, the piston valve rod 2 further comprises a lower piston 22, the lower piston 22 is positioned below the mounting hole 13 and is in contact fit with the inner wall of the valve body 1, and the upper piston 21 is positioned above the mounting hole 13.
An end cover 5 is fixedly arranged on the upper portion of the valve body 1, the end cover 5 is in sealing fit with the valve body 1 through an end cover sealing ring 51, a mounting groove 52 is formed in the lower surface of the end cover 5, and the small spring 4 and the small spring seat 41 are mounted in the mounting groove 52 and move up and down.
The lower end face of the small spring seat 41 is provided with a small spring sealing ring 42, and the small spring sealing ring 42 is in sealing fit with the edge of the upper opening of the air outlet channel 20.
An upper sealing ring 211 is arranged on the upper piston 21, and the upper sealing ring 211 is in sealing fit with the wall surface of the ventilation channel formed by the inner wall of the valve body 1.
The side wall of the lower piston 22 is provided with a lower sealing ring 221, and the lower sealing ring 221 is in sealing fit with the inner wall of the lower part of the valve body 1.
The lower end of the lower piston 22 is provided with a positioning boss 222, and the large spring 3 is matched with the positioning boss 222.
When compressed air enters the air inlet 11 from the air circuit board, when the pressure of the air inlet cavity 101 is smaller than the spring force of the small spring 4, the upper piston 21 is jacked up and a gap between the upper piston 21 and the inner wall of the valve body 1 is opened, and the compressed air enters the air outlet cavity 102 through the gap between the upper piston 21 and the valve body 1 and is discharged through the air outlet 12, as shown in fig. 2; meanwhile, part of gas flows into the lower part of the valve body 1 through a gap between the mounting hole 13 and the piston valve rod 2 and is accumulated in a cavity between the lower piston 22 and the inner wall of the lower part of the valve body 1, and when the pressure of compressed air in the cavity is gradually increased and exceeds the opening pressure of the spring 3, the large piston 3 drives the piston valve rod 2 to move downwards to close the gap between the upper piston 21 and the valve body. When the pressure of the air outlet 12 is higher than the opening pressure of the small spring 3, the air outlet 12 pushes the small spring 3 upwards and opens the air outlet channel 20 to discharge the air in the cavity to the atmosphere, as shown in fig. 3. In summary, after the high-pressure compressed air passing through the air inlet 11 passes through the structure, the pressure is reduced to a certain stable value, and the air is continuously supplied to the air outlet 12.
Example 2
The same as in embodiment 1, except that the lower part of the valve body 1 is also fixedly provided with a mounting sleeve 14, and the large spring 3 is mounted in the mounting sleeve 14.
The lower extreme of installation sleeve 14 is equipped with the screw hole, still includes adjusting screw 6, and adjusting screw 6 upwards stretches into in the installation sleeve 14 through the screw hole, and adjusting screw 6's upper end is equipped with mount pad 61, and the lower extreme and the mount pad 61 contact cooperation of big spring 3.
By setting the adjusting screw 6, the degree of compression of the large spring 3 can be changed, thereby adjusting the constant output air pressure of the air outlet 12.
Example 3
The same as in embodiment 1, except that the valve body 1 is further provided with an air inlet plug 15 communicating with the air inlet chamber 101, and the valve body 1 is further provided with an air outlet plug 16 communicating with the air outlet chamber 102.
In summary, the foregoing description is only of the preferred embodiments of the present utility model, and all equivalent changes and modifications made in accordance with the claims should be construed to fall within the scope of the utility model.
Claims (10)
1. The plate-type pressure limiting valve comprises a valve body (1), wherein an air inlet (11) and an air outlet (12) are formed in the valve body (1), and the plate-type pressure limiting valve is characterized in that: a piston valve rod (2) is arranged in the valve body (1), the piston valve rod (2) comprises an upper piston (21), and the upper piston (21) is in contact fit with the inner wall of the valve body (1) and divides the inner cavity of the valve body into an air inlet cavity (101) and an air outlet cavity (102) which are respectively communicated with the air inlet (11) and the air outlet (12); still include big spring (3), the upper and lower both ends of big spring (3) respectively with plug valve pole (2) lower part and valve body (1) inner wall contact and promote piston valve rod (2) upwards, valve body (1) still installs little spring (4) and little spring holder (41) that are located last piston (21) top, little spring holder (41) receive the effort of little spring (4) to promote downwards and sealing fit in the up end of piston valve rod (2), be equipped with in piston valve rod (2) and give vent to anger passageway (20), the upper opening and the cooperation of little spring holder (41) of give vent to anger passageway (20), the lower opening and the external atmosphere intercommunication of giving vent to anger passageway (20).
2. The plate pressure limiting valve of claim 1, wherein: the valve body (1) is internally provided with a mounting hole (13), the piston valve rod (2) is in clearance fit with the mounting hole (13) and moves up and down along the mounting hole (13), the piston valve rod (2) further comprises a lower piston (22), the lower piston (22) is positioned below the mounting hole (13) and is in contact fit with the inner wall of the valve body (1), and the upper piston (21) is positioned above the mounting hole (13).
3. The plate pressure limiting valve of claim 1, wherein: an end cover (5) is fixedly arranged on the upper portion of the valve body (1), the end cover (5) is in sealing fit with the valve body (1) through an end cover sealing ring (51), a mounting groove (52) is formed in the lower surface of the end cover (5), and the small spring (4) and the small spring seat (41) are mounted in the mounting groove (52) and move up and down.
4. A plate pressure limiting valve according to claim 1 or 3, wherein: the lower end face of the small spring seat (41) is provided with a small spring sealing ring (42), and the small spring sealing ring (42) is in sealing fit with the edge of the upper opening of the air outlet channel (20).
5. The plate pressure limiting valve of claim 1, wherein: an upper sealing ring (211) is arranged on the upper piston (21), and the upper sealing ring (211) and the inner wall of the valve body (1) form a ventilation channel wall surface in sealing fit.
6. The plate pressure limiting valve of claim 1, wherein: the side wall of the lower piston (22) is provided with a lower sealing ring (221), and the lower sealing ring (221) is in sealing fit with the inner wall of the lower part of the valve body (1).
7. The plate pressure limiting valve of claim 1, wherein: the lower end of the lower piston (22) is provided with a positioning boss (222), and the big spring (3) is matched with the positioning boss (222).
8. The plate pressure limiting valve of claim 1, wherein: the lower part of the valve body (1) is fixedly provided with a mounting sleeve (14), and the large spring (3) is arranged in the mounting sleeve (14).
9. The plate pressure limiting valve of claim 8, wherein: the lower extreme of installation sleeve (14) is equipped with the screw hole, still includes adjusting screw (6), and adjusting screw (6) upwards stretches into in installation sleeve (14) through the screw hole, and the upper end of adjusting screw (6) is equipped with mount pad (61), and the lower extreme and the mount pad (61) contact cooperation of big spring (3).
10. The plate pressure limiting valve of claim 1, wherein: an air inlet plug (15) communicated with the air inlet cavity (101) is further arranged on the valve body (1), and an air outlet plug (16) communicated with the air outlet cavity (102) is further arranged on the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321252395.5U CN219975509U (en) | 2023-05-23 | 2023-05-23 | Plate-type pressure limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321252395.5U CN219975509U (en) | 2023-05-23 | 2023-05-23 | Plate-type pressure limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219975509U true CN219975509U (en) | 2023-11-07 |
Family
ID=88593401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321252395.5U Active CN219975509U (en) | 2023-05-23 | 2023-05-23 | Plate-type pressure limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219975509U (en) |
-
2023
- 2023-05-23 CN CN202321252395.5U patent/CN219975509U/en active Active
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