Pneumatic control mechanism of hydraulic valve

Abstract

The utility model discloses a pneumatic control mechanism of a hydraulic valve, and relates to the technical field of hydraulic control. The pneumatic control mechanism of the hydraulic valve comprises a mechanism body, a shell is fixedly connected to the outer side of the mechanism body, a valve element push rod is arranged at the bottom of the mechanism body, and a protection assembly is arranged on the outer side of the shell; the protection assembly comprises a pipeline, an air bag is fixedly connected to the side face of the pipeline, and a fixing rod is fixedly connected to the side face of the shell. According to the pneumatic control mechanism of the hydraulic valve, when air leakage exists between the mechanism body and the valve element push rod, air is introduced into the air bag, the air bag is expanded, the transmission rod is extruded, then the storage bin can be driven to rotate to the bottom of the mechanism body, the cover plate rotates with the second torsion spring as the axis, the storage bin is opened, and the safety air bag can be popped out; the bottom of a gas leakage position is protected, and the anti-explosion effect is prevented from being reduced due to large-amount gas leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic control, in particular to a pneumatic control mechanism of a hydraulic valve. Background Art

[0002] The hydraulic reversing valve is a directional control valve that uses the controlled liquid pressure to push the valve core to change the direction of fluid flow. According to the number of passages controlled by the reversing valve, it is divided into two-way, three-way, four-way and five-way, etc. The absolute movement of the valve core and the valve body is used to make the oil circuit open, shut off or change the direction of oil flow, thereby making the hydraulic actuator and its drive mechanism move, end or change the direction of movement.

[0003] According to a disclosed pneumatic control mechanism of a hydraulic valve (Announcement No.: CN217055752U), it includes a cylinder body, a cylinder piston is slidably fitted in the cylinder body, the cylinder piston is connected to a valve core push rod of the hydraulic valve, an air pipe joint is provided at the end of the cylinder body, and the cylinder piston drives the valve core push rod to move. In the above application document, a cylinder body is provided on the valve core push rod to perform corresponding explosion-proof operations. However, in the case of air leakage between the starting control mechanism and the valve core push rod, the explosion-proof effect of the device is reduced. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a pneumatic control mechanism for a hydraulic valve, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a pneumatic control mechanism for a hydraulic valve, comprising a mechanism body, a housing is fixedly connected to the outside of the mechanism body, a valve core push rod is arranged at the bottom of the mechanism body, and a protective component is arranged on the outside of the housing;

[0005] The protection component includes a pipe, an airbag is fixedly connected to the side of the pipe, a fixing rod is fixedly connected to the side of the shell, the side of the fixing rod is rotatably connected to a transmission rod via a torsion spring 1, the side of the transmission rod is fixedly connected to a storage bin, the side of the storage bin is rotatably connected to a cover plate via a torsion spring 2, and a safety airbag is arranged inside the storage bin.

[0006] Preferably, the transmission rod is located at a side position of the airbag, and the transmission rod is in contact with the airbag, so that the airbag expands, which can squeeze the transmission rod to move it.

[0007] Preferably, part of the pipeline is located inside the shell, and the pipeline is fixed to the shell, so that the pipeline passes through the shell, and part of the pipeline is located outside the shell.

[0008] Preferably, an alarm component is provided on the outer side of the housing;

[0009] The alarm component comprises a limiting rod, the side surface of the shell is rotatably connected with a knocking rod via a torsion spring, and the side surface of the shell is fixedly connected with a metal spring sheet.

[0010] Preferably, the limiting rod is located at the top of the transmission rod, and the limiting rod and the transmission rod are in a fixed state, so that when the transmission rod rotates, the limiting rod can rotate accordingly.

[0011] Preferably, the knocking rod is located at the bottom of the metal reed, so that the knocking rod can be rotated to knock the metal reed.

[0012] The utility model provides a pneumatic control mechanism for a hydraulic valve, which has the following beneficial effects:

[0013] (1) The pneumatic control mechanism of the hydraulic valve, when there is a leak between the mechanism body and the valve core push rod, allows gas to flow into the airbag, causing the airbag to expand and squeeze the transmission rod, which can drive the storage bin to rotate to the bottom of the mechanism body. The cover plate rotates around the second torsion spring, opening the storage bin, and the safety airbag can pop out to protect the bottom of the leak, preventing a large amount of gas leakage from reducing the explosion-proof effect.

[0014] (2) The pneumatic control mechanism of the hydraulic valve, when the transmission rod rotates, causes the limit rod to rotate, and the knocking rod loses its restriction, it can rotate under the action of torsion spring three, knocking the metal reed, sounding an alarm, and thus alerting nearby personnel that there is a leak in the mechanism body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional appearance structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the protective component of the utility model;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the alarm component of the utility model.

[0019] In the figure: 1. Mechanism body; 2. Shell; 3. Valve core push rod; 4. Pipe; 5. Airbag; 6. Fixing rod; 7. Torsion spring 1; 8. Transmission rod; 9. Storage compartment; 10. Torsion spring 2; 11. Cover plate; 12. Safety airbag; 13. Limiting rod; 14. Torsion spring 3; 15. Knocking rod; 16. Metal reed. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] For example, see Figure 1-3 A pneumatic control mechanism of a hydraulic valve comprises a mechanism body 1, a housing 2 is fixedly connected to the outer side of the mechanism body 1, a valve core push rod 3 is arranged at the bottom of the mechanism body 1, and a protective component is arranged on the outer side of the housing 2;

[0022] The protection component includes a pipeline 4, part of which is located inside the shell 2, and the pipeline 4 is fixed to the shell 2. The side of the pipeline 4 is fixedly connected with an airbag 5. When there is a gas leakage between the mechanism body 1 and the valve core push rod 3, the gas is passed into the airbag 5 through the pipeline 4, so that the airbag 5 expands. The side of the shell 2 is fixedly connected with a fixing rod 6, and the side of the fixing rod 6 is rotatably connected with a transmission rod 8 through a torsion spring 7. The transmission rod 8 is located at the side of the airbag 5, and the transmission rod 8 is in contact with the airbag 5. When the airbag 5 expands, the transmission rod 8 can be squeezed, and the fixing rod 6 rotatably connected to the transmission rod 8 through the torsion spring 7 makes the transmission rod 8 The fixed rod 6 is rotated with the axis as the center, and the side of the transmission rod 8 is fixedly connected to the storage bin 9, and the side of the storage bin 9 is rotatably connected to the cover plate 11 through the torsion spring 10. The storage bin 9 is provided with an airbag 12 inside. When the transmission rod 8 rotates, the storage bin 9 fixedly connected thereto can be driven to rotate to the bottom of the mechanism body 1. At this time, the cover plate 11 is squeezed by the mechanism body 1, and cooperates with the storage bin 9 rotatably connected thereto through the torsion spring 10, so that the cover plate 11 rotates with the torsion spring 10 as the axis, and the storage bin 9 is opened, and the airbag 12 in the storage bin 9 can be popped out to protect the bottom of the leaking part to prevent a large amount of gas leakage from reducing the explosion-proof effect.

[0023] During use, when there is an air leakage between the mechanism body 1 and the valve core push rod 3, the gas is passed into the airbag 5 through the pipeline 4, causing the airbag 5 to expand, squeezing the transmission rod 8, and cooperating with the fixed rod 6 rotatably connected to the transmission rod 8 through the torsion spring 1 7, so that the transmission rod 8 rotates around the fixed rod 6 as the axis, and the transmission rod 8 then drives the storage bin 9 fixedly connected thereto to rotate to the bottom of the mechanism body 1. At this time, the cover plate 11 is squeezed by the mechanism body 1, and cooperates with the storage bin 9 rotatably connected thereto through the torsion spring 2 10, so that the cover plate 11 rotates around the torsion spring 2 10 as the axis, thereby opening the storage bin 9 and popping out the safety airbag 12 in the storage bin 9.

[0024] For example 2, please refer to Figure 1-4 , based on the first embodiment, an alarm component is provided on the outer side of the housing 2;

[0025] The alarm assembly includes a limiting rod 13, which is located at the top position of the transmission rod 8. The limiting rod 13 and the transmission rod 8 are in a fixed state. When the transmission rod 8 rotates, the limiting rod 13 fixedly connected to the transmission rod 8 rotates, and the side of the shell 2 is rotatably connected to the knocking rod 15 through a torsion spring three 14. The side of the shell 2 is fixedly connected to a metal spring 16, and the knocking rod 15 is located at the bottom position of the metal spring 16. When the limiting rod 13 rotates, the knocking rod 15 loses the restriction of the limiting rod 13 and can rotate under the action of the torsion spring three 14 connected thereto, knocking the metal spring 16, and sounding an alarm, thereby alerting nearby staff that a gas leak has occurred in the mechanism body 1.

[0026] During use, based on the first embodiment, when the transmission rod 8 rotates, the limiting rod 13 fixedly connected to the transmission rod 8 rotates, and the knocking rod 15 loses the restriction of the limiting rod 13, and can rotate under the action of the torsion spring three 14 connected thereto, knocking the metal reed 16 and sounding an alarm.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pneumatic control mechanism for a hydraulic valve, comprising a mechanism body (1), characterized in that: The outer side of the mechanism body (1) is fixedly connected to a housing (2), a valve core push rod (3) is arranged at the bottom of the mechanism body (1), and a protective component is arranged on the outer side of the housing (2); The protection component comprises a pipe (4), an airbag (5) is fixedly connected to the side of the pipe (4), a fixing rod (6) is fixedly connected to the side of the housing (2), a transmission rod (8) is rotatably connected to the side of the fixing rod (6) by means of a first torsion spring (7), a storage bin (9) is fixedly connected to the side of the transmission rod (8), a cover plate (11) is rotatably connected to the side of the storage bin (9) by means of a second torsion spring (10), and a safety airbag (12) is arranged inside the storage bin (9).

2. A pneumatic control mechanism for a hydraulic valve according to claim 1, characterized in that: The transmission rod (8) is located at a side position of the airbag (5), and the transmission rod (8) is in contact with the airbag (5).

3. A pneumatic control mechanism for a hydraulic valve according to claim 1, characterized in that: Part of the pipeline (4) is located inside the shell (2), and the pipeline (4) and the shell (2) are in a fixed state.

4. A pneumatic control mechanism for a hydraulic valve according to claim 1, characterized in that: An alarm component is provided on the outer side of the housing (2); The alarm assembly comprises a limiting rod (13), the side surface of the housing (2) is rotatably connected to a striking rod (15) via a torsion spring (14), and the side surface of the housing (2) is fixedly connected to a metal spring sheet (16).

5. A pneumatic control mechanism for a hydraulic valve according to claim 4, characterized in that: The limiting rod (13) is located at the top of the transmission rod (8), and the limiting rod (13) and the transmission rod (8) are in a fixed state.

6. A pneumatic control mechanism for a hydraulic valve according to claim 4, characterized in that: The knocking rod (15) is located at the bottom of the metal reed (16).

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