High-stability pilot valve

Abstract

The utility model discloses a high-stability pilot valve, which relates to the technical field of pilot valves, and aims to solve the problems that the existing pilot valve is insufficient in structure compactness and working stability, and the overall practicability and functionality need to be improved, and adopts the technical scheme that the high-stability pilot valve comprises a pilot valve rear cover, a valve body is mounted on the outer surface of one side of the pilot valve rear cover, a valve element seat is mounted in the valve body, a through hole is formed in the middle axis position of the valve element seat, a first valve element ejector rod is slidably mounted in the through hole, a valve element is mounted at one end of the first valve element ejector rod, a first spring is arranged at one end of the first valve element ejector rod, and a second spring is arranged at the other end of the first valve element ejector rod. The end of the valve body is in threaded connection with an air inlet connector, one end of the valve element abuts against the end of an air inlet hole of the air inlet connector, and a pilot valve front cover is arranged on one side of the pilot valve rear cover. And the effects that fluid conveying control operation can be stably conducted, and practicability is high are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pilot valves, in particular to a high-stability pilot valve. Background Art

[0002] The pilot valve is an auxiliary valve used to manipulate the control mechanism in other valves or components. It has the characteristics of relatively small input signal and can accept multiple input methods. In modern fluid delivery pipelines, pilot valves are widely used.

[0003] The existing pilot valves have deficiencies in terms of compact structure and stable operation, and their overall practicality and functionality need to be improved. Utility Model Content

[0004] The utility model aims to provide a high-stability pilot valve which can stably perform fluid delivery control operations and has high practicality.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The cam is an airtight container which is provided with a valve core and a second valve core push rod which is provided at one end of the cam and a valve core is provided at one end of the cam.

[0007] By adopting the above technical solution, the valve can be opened and closed stably.

[0008] Furthermore, a second spring is arranged between the second valve core push rod and the pilot valve piston, and two ends of the second spring are respectively sleeved on the outside of the second valve core push rod and the pilot valve piston.

[0009] By adopting the above technical solution, the second spring can be used to perform a reset operation on the pilot valve piston.

[0010] Furthermore, a plurality of threaded holes are arranged on the end surface of the valve body, a plurality of countersunk holes corresponding to the positions of the threaded holes are arranged on the outer surface of the pilot valve rear cover, and hexagon socket bolts are installed inside the countersunk holes and the threaded holes.

[0011] By adopting the above technical solution, the valve body and the rear cover of the pilot valve can be firmly fixedly connected.

[0012] Furthermore, a plurality of external hexagonal bolts are arranged on the outside of the pilot body, and the pilot valve rear cover and the pilot valve front cover are fixedly connected by the external hexagonal bolts.

[0013] By adopting the above technical solution, the rear cover of the pilot valve and the front cover of the pilot valve can be firmly fixedly connected.

[0014] Furthermore, an exhaust hole is provided on the side surface of the valve body, and a detection seat is connected to the internal thread of the exhaust hole, a pressure detection seat is fixedly connected to the side surface of the detection seat, a connecting pipe is fixedly connected to the side surface of the pressure detection seat, a linkage piston is slidably installed at the port of the connecting pipe, one end of the linkage piston is fixedly connected to a push block, and hydraulic oil is contained in the connecting pipe and the pressure detection seat.

[0015] By adopting the above technical solution, the push block and the linkage piston can be used to convert the force, which can effectively realize the monitoring operation of the exhaust gas stability.

[0016] Furthermore, the push block is located at the air flow channel port inside the detection seat, a mounting hole is provided on the side surface of the pressure detection seat, and a pressure sensor is fixedly installed inside the mounting hole, and the detection end of the pressure sensor is placed in the hydraulic oil inside the pressure detection seat.

[0017] By adopting the above technical solution, the pressure sensor can be used to monitor the oil pressure of the hydraulic oil in real time.

[0018] In summary, the beneficial technical effects of the utility model are:

[0019] 1. The utility model can make the pilot valve piston fit on the outer surface of the pilot valve front cover when the valve is opened. At this time, the pilot valve piston no longer provides a force on the second valve core push rod, and the compression force of the first spring is reduced. Under the pressure at the external air inlet, the first valve core push rod slides inside the valve core seat, and the valve core is separated from the air inlet joint. At this time, the external gas can pass through the air inlet joint and be discharged from the exhaust hole on the side surface of the valve body. When the valve needs to be closed, the pilot valve piston fits on the outer surface of the pilot valve rear cover. At this time, one end of the pilot valve piston presses one end of the second valve core push rod, and the second valve core push rod squeezes the first spring. The first spring is compressed, and one end of the first spring can effectively press one end of the first valve core push rod, thereby allowing the valve core to press against the port of the air inlet joint, which can effectively close the valve. In the process of closing the valve, the compressed first spring can press against one end of the first valve core push rod in real time, thereby allowing the valve core to firmly press against the port of the air inlet joint, thereby ensuring the stability of valve closing. The entire pilot valve has a compact structure and stable operation.

[0020] 2. When the utility model is in the open state, when the gas is discharged from the exhaust port on the side surface of the valve body, the gas can effectively enter the interior of the detection seat. Since the push block is placed in the gas flow channel of the detection seat, the gas will hit the outer surface of the push block when passing through the interior of the detection seat. Since the push block is fixedly connected to one end of the linkage piston, the push block is stressed, and the linkage piston slides inside the connecting pipe, thereby squeezing the hydraulic oil inside the pressure detection seat. At this time, the pressure sensor can be used to monitor the oil pressure of the hydraulic oil in real time, and then when the valve is opened, the stability of the gas passing through the detection seat can be monitored in real time, and then the flow stability of the gas in the entire transmission line can be monitored, and the functionality is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the utility model;

[0022] Figure 2 For this utility model Figure 1 AA analysis diagram.

[0023] In the figure: 1. Inlet connector; 2. Valve body; 3. Valve core; 4. First valve core push rod; 5. Valve core seat; 6. First spring; 7. Second valve core push rod; 8. First O-ring; 9. Pilot valve rear cover; 10. Pilot valve piston; 11. Second O-ring; 12. Pilot body; 13. Third O-ring; 14. External hexagonal bolt; 15. Pilot valve front cover; 16. Second spring; 17. Fourth O-ring; 18. Internal hexagonal bolt; 19. Detection seat; 20. Push block; 21. Connecting pipe; 22. Linkage piston; 23. Pressure detection seat; 24. Pressure sensor. DETAILED DESCRIPTION

[0024] The method of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] See attached Figure 1 , Attachment Figure 2A high-stability pilot valve comprises a pilot valve rear cover 9, a valve body 2 is installed on the outer surface of one side of the pilot valve rear cover 9, a valve core seat 5 is installed inside the valve body 2, a through hole is arranged at the central axis position of the valve core seat 5, and a first valve core push rod 4 is slidably installed inside the through hole, a valve core 3 is installed at one end of the first valve core push rod 4, a first spring 6 is arranged at one end of the first valve core push rod 4, an air inlet joint 1 is threadedly connected to the end of the valve body 2, one end of the valve core 3 is against the end of the air inlet hole of the air inlet joint 1, a pilot valve front cover 15 is arranged on one side of the pilot valve rear cover 9, a pilot body 12 is arranged between the pilot valve front cover 15 and the pilot valve rear cover 9, and a pilot valve is provided. A pilot valve piston 10 is slidably installed inside the pilot body 12, and a second valve core push rod 7 is arranged at one end of the pilot valve piston 10. The second valve core push rod 7 is slidably installed in the sliding hole at the end of the valve body 2. The first spring 6 is located at one end of the second valve core push rod 7. A fourth O-ring 17 is snap-fitted on the outer surface of the valve core seat 5 and the air inlet joint 1. A first O-ring 8 is installed inside the valve body 2, and the first O-ring 8 is sleeved on the outside of the second valve core push rod 7. A second O-ring 11 is snap-fitted on the outside of the pilot valve piston 10. A third O-ring 13 is snap-fitted on the end of the pilot body 12. A second spring 16 is arranged between the rod 7 and the pilot valve piston 10, and the two ends of the second spring 16 are respectively sleeved on the outside of the second valve core push rod 7 and the pilot valve piston 10, wherein when the valve is opened, the pilot valve piston 10 can be fitted on the outer surface of the pilot valve front cover 15, at this time, the pilot valve piston 10 no longer provides a force on the second valve core push rod 7, the compression force of the first spring 6 is reduced, and under the pressure at the external air inlet, the first valve core push rod 4 slides inside the valve core seat 5, and the valve core 3 is separated from the air inlet connector 1. At this time, the external gas can pass through the air inlet connector 1 and be discharged from the exhaust hole on the side surface of the valve body 2. When the valve needs to be closed , so that the pilot valve piston 10 fits on the outer surface of the pilot valve back cover 9. At this time, one end of the pilot valve piston 10 presses against one end of the second valve core push rod 7, and the second valve core push rod 7 squeezes the first spring 6. The first spring 6 is compressed, and one end of the first spring 6 can effectively press against one end of the first valve core push rod 4, so that the valve core 3 can press against the port of the intake joint 1, and the valve can be effectively closed. In the process of valve closing, the compressed first spring 6 can press against one end of the first valve core push rod 4 in real time, so that the valve core 3 can firmly press against the port of the intake joint 1, which can ensure the stability of valve closing. The entire pilot valve has a compact structure and stable operation.

[0026] Reference Figure 1 , Figure 2A plurality of threaded holes are arranged on the end face of the valve body 2, a plurality of countersunk holes corresponding to the positions of the threaded holes are arranged on the outer surface of the pilot valve rear cover 9, and internal hexagonal bolts 18 are installed inside the countersunk holes and the threaded holes, a plurality of external hexagonal bolts 14 are arranged outside the pilot body 12, and the pilot valve rear cover 9 and the pilot valve front cover 15 are fixedly connected by the external hexagonal bolts 14, so that the entire pilot valve can be assembled and fixed flexibly and conveniently.

[0027] Reference Figure 2 A vent hole is provided on the side surface of the valve body 2, and a detection seat 19 is connected to the inner thread of the vent hole, a pressure detection seat 23 is fixedly connected to the side surface of the detection seat 19, a connecting pipe 21 is fixedly connected to the side surface of the pressure detection seat 23, a linkage piston 22 is slidably installed at the port of the connecting pipe 21, a push block 20 is fixedly connected to one end of the linkage piston 22, hydraulic oil is contained in the connecting pipe 21 and the pressure detection seat 23, the push block 20 is located at the port of the air flow channel inside the detection seat 19, a mounting hole is provided on the side surface of the pressure detection seat 23, and a pressure sensor 24 (STG02) is fixedly installed inside the mounting hole, and the detection end of the pressure sensor 24 is placed in the hydraulic oil inside the pressure detection seat 23, wherein in the open state When the gas is discharged from the exhaust port on the side surface of the valve body 2, the gas can effectively enter the interior of the detection seat 19. Since the push block 20 is placed in the gas flow channel of the detection seat 19, the gas will hit the outer surface of the push block 20 when passing through the interior of the detection seat 19. Since the push block 20 is fixedly connected to one end of the linkage piston 22, the push block 20 is subjected to force, and the linkage piston 22 slides inside the connecting pipe 21, thereby squeezing the hydraulic oil inside the pressure detection seat 23. At this time, the pressure sensor 24 can be used to monitor the oil pressure of the hydraulic oil in real time, and then when the valve is opened, the stability of the gas passing through the detection seat 19 can be monitored in real time, and then the flow stability of the gas in the entire transmission line can be monitored, and the functionality is effectively improved.

[0028] Working principle: When in use, first assemble the various components of the pilot valve, and then install the pilot valve at the specified position. At this time, it can be used normally. When opening the valve, the pilot valve piston 10 is attached to the outer surface of the pilot valve front cover 15. At this time, the pilot valve piston 10 no longer provides force on the second valve core push rod 7, and the compression force of the first spring 6 is reduced. Under the pressure at the external air inlet, the first valve core push rod 4 slides inside the valve core seat 5, and the valve core 3 is separated from the air inlet connector 1. At this time, the external gas can pass through the air inlet connector 1 and be discharged from the exhaust hole on the side surface of the valve body 2. When the valve needs to be closed, the pilot valve piston 10 is attached to the outer surface of the pilot valve rear cover 9. At this time, one end of the pilot valve piston 10 is pressed against one end of the second valve core push rod 7, and the second valve core push rod 7 squeezes the first spring 6. The first spring 6 is compressed, and one end of the first spring 6 can effectively press against one end of the first valve core push rod 4, so that the valve core 3 can press against the port of the air inlet connector 1, which can effectively close the valve. The valve, during the process of closing the valve, the compressed first spring 6 can be pressed against one end of the first valve core push rod 4 in real time, so that the valve core 3 can be firmly pressed against the port of the air inlet connector 1, which can ensure the stability of the valve closing. During the operation of the valve, in the open state, when the gas is discharged from the exhaust port on the side surface of the valve body 2, the gas can effectively enter the interior of the detection seat 19. Since the push block 20 is placed in the gas flow channel of the detection seat 19, when the gas passes through the interior of the detection seat 19, the gas will hit the outer surface of the push block 20. Since the push block 20 is fixedly connected to one end of the linkage piston 22, the push block 20 is stressed, and the linkage piston 22 slides inside the connecting pipe 21, thereby squeezing the hydraulic oil inside the pressure detection seat 23. At this time, the pressure sensor 24 can be used to monitor the oil pressure of the hydraulic oil in real time, and then when the valve is opened, the stability of the gas passing through the interior of the detection seat 19 can be monitored in real time, and then the flow stability of the gas in the entire transmission line can be monitored.

[0029] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high stability pilot valve, comprising a pilot valve rear cover (9), characterized in that: A valve body (2) is mounted on an outer surface of one side of the pilot valve rear cover (9); a valve core seat (5) is mounted inside the valve body (2); a through hole is provided at a central axis position of the valve core seat (5); a first valve core push rod (4) is slidably mounted inside the through hole; a valve core (3) is mounted on one end of the first valve core push rod (4); a first spring (6) is disposed on one end of the first valve core push rod (4); an air inlet connector (1) is threadedly connected to the end of the valve body (2); one end of the valve core (3) abuts against the air inlet connector (1) 1), a pilot valve front cover (15) is arranged on one side of the pilot valve rear cover (9), a pilot body (12) is arranged between the pilot valve front cover (15) and the pilot valve rear cover (9), a pilot valve piston (10) is slidably mounted inside the pilot body (12), a second valve core push rod (7) is arranged at one end of the pilot valve piston (10), the second valve core push rod (7) is slidably mounted in a sliding hole at the end of the valve body (2), and the first spring (6) is located at one end of the second valve core push rod (7).

2. A high stability pilot valve according to claim 1, characterized in that: A second spring (16) is provided between the second valve core push rod (7) and the pilot valve piston (10), and two ends of the second spring (16) are respectively sleeved on the outside of the second valve core push rod (7) and the pilot valve piston (10).

3. A high stability pilot valve according to claim 1, characterized in that: A plurality of threaded holes are arranged on the end surface of the valve body (2), a plurality of countersunk holes corresponding to the positions of the threaded holes are arranged on the outer surface of the pilot valve rear cover (9), and hexagon socket bolts (18) are installed inside the countersunk holes and the threaded holes.

4. A high stability pilot valve according to claim 1, characterized in that: A plurality of external hexagonal bolts (14) are arranged outside the pilot body (12), and the pilot valve rear cover (9) and the pilot valve front cover (15) are fixedly connected via the external hexagonal bolts (14).

5. A high stability pilot valve according to claim 1, characterized in that: The valve body (2) is provided with an exhaust hole on the side surface thereof, and the exhaust hole is internally threadedly connected to a detection seat (19), a pressure detection seat (23) is fixedly connected to the side surface of the detection seat (19), a connecting pipe (21) is fixedly connected to the side surface of the pressure detection seat (23), a linkage piston (22) is slidably mounted at the end of the connecting pipe (21), one end of the linkage piston (22) is fixedly connected to a push block (20), and hydraulic oil is contained inside the connecting pipe (21) and the pressure detection seat (23).

6. A high stability pilot valve according to claim 5, characterized in that: The push block (20) is located at the air flow channel port inside the detection seat (19), a mounting hole is provided on the side surface of the pressure detection seat (23), and a pressure sensor (24) is fixedly installed inside the mounting hole, and a detection end of the pressure sensor (24) is placed in the hydraulic oil inside the pressure detection seat (23).

Images