CN220688046U - Limiting and protecting device for pneumatic regulating valve - Google Patents
Limiting and protecting device for pneumatic regulating valve Download PDFInfo
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- CN220688046U CN220688046U CN202321834285.XU CN202321834285U CN220688046U CN 220688046 U CN220688046 U CN 220688046U CN 202321834285 U CN202321834285 U CN 202321834285U CN 220688046 U CN220688046 U CN 220688046U
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Abstract
The utility model belongs to the technical field of pneumatic control valves, and particularly relates to a limit protection device for a pneumatic control valve, which comprises a valve body, a valve cover, a valve head support and a pneumatic actuator, wherein a valve seat and a valve core are arranged in the valve body, a valve rod is connected above the valve core, the valve head support is fixedly connected to the valve cover, the pneumatic actuator is arranged above the valve head support, the valve rod is coaxially connected with an acting end of the pneumatic actuator through a connecting block, the connecting block is positioned in the middle of the valve head support, one side of the valve head support is provided with a traction electromagnet, a supporting sleeve capable of supporting the connecting block in and out is arranged at the telescopic end of the traction electromagnet, a compression spring is arranged between the supporting sleeve and the valve head support, a pneumatic sensor is arranged on the pneumatic actuator, and a controller is arranged at the other side of the valve head support, and the traction electromagnet and a valve core switch are in linkage control. Through add the spacing protection device of linkage on pneumatic control valve, can effectively prevent because of the unusual malfunction problem that leads to pneumatic control valve self return of air supply.
Description
Technical Field
The utility model belongs to the technical field of pneumatic control valves, and particularly relates to a limit protection device of a pneumatic control valve.
Background
The pneumatic regulating valve is used as a common instrument control device, has wide application in the dangerous chemicals industries such as petrochemical industry, can realize the regulation of fluid through a remote operation or automatic control system, and has the characteristics of high precision, wide regulating range, quick response and the like.
However, in the actual use process, the pneumatic control valve is difficult to avoid a series of faults such as a positioner fault, diaphragm damage, air source leakage and the like in long-time work due to a severe working environment. Once the conditions of air interruption of compressed air or unstable air source and the like occur, a valve rod and a valve core of the pneumatic regulating valve automatically fall back to the original state, so that the pneumatic regulating valve is in misoperation, the working condition in the stable production state is greatly changed, the production is reduced if the working condition is light, the unplanned outage of the whole plant device is caused if the working condition is heavy, and the production stability, the equipment safety and the personal safety are seriously influenced.
At present, the probability of faults is reduced by means of manual inspection and manual maintenance of instrument maintenance personnel, but the number of the pneumatic regulating valves is large, the pneumatic regulating valves are widely distributed, the faults are uncertain, and the faults cannot be completely prevented by manpower, so that a limit protection device is very necessary to be designed to prevent the situation of misoperation of the pneumatic regulating valves caused by abnormality of air sources.
Disclosure of Invention
Aiming at the situation, the utility model designs the limit protection device for the pneumatic adjusting valve, which can effectively prevent the misoperation problem of automatic return of the pneumatic adjusting valve caused by the abnormality of the air source.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a limit protection device of pneumatic control valve, includes valve body, valve gap, valve head support and the pneumatic actuator of pneumatic control valve, be provided with disk seat and case in the valve body, but the case is contradicted with the disk seat cooperation switch, and the case top is connected with the valve rod.
The valve cover is sealed and fixedly arranged on the valve body, the valve head support is fixedly connected to the valve cover, the pneumatic actuator is arranged above the valve head support, the upper end of the valve rod coaxially penetrates through the valve cover and the valve head support and is connected with the acting end of the pneumatic actuator through a connecting block, the pneumatic actuator drives the valve core to open and close through the valve rod, and the connecting block is positioned in the middle of the valve head support.
The pneumatic valve is characterized in that a traction electromagnet is arranged on one side of the valve head support, a supporting sleeve capable of entering and exiting a supporting connecting block is arranged at the telescopic end of the traction electromagnet, a compression spring is arranged between the supporting sleeve and the valve head support, an air pressure sensor is arranged on the pneumatic actuator, a controller is arranged on the other side of the valve head support, the air pressure sensor and the traction electromagnet are electrically connected with the controller, the controller simultaneously controls the opening and closing actions of the pneumatic regulating valve, and the traction electromagnet is linked with the pneumatic regulating valve through the controller.
Further, the pneumatic regulating valve is an air-open regulating valve, a pneumatic diaphragm is arranged in the pneumatic actuator, a pressing spring is arranged above the pneumatic diaphragm, an air chamber is arranged below the pneumatic diaphragm, and an air inlet and an air outlet are formed in the air chamber.
Further, the support sleeve is a circular tube with a section of axis parallel to the valve rod, an opening for the valve rod to enter and exit is formed in one side of the circular tube facing the valve rod, a slope surface is formed in the upper portion of the opening, and a serrated surface is arranged on the slope surface, so that the reliability of limiting support of the support sleeve on the connecting block can be improved.
Further, the traction electromagnet is a push-pull electromagnet, a shell of the traction electromagnet is fixedly connected to the outer side of the valve head support, and a telescopic end of a push-pull rod of the traction electromagnet extends to the inner side and is fixedly connected with the support sleeve.
Further, a collapsible clamping hole is formed in the middle of the connecting block, and the acting end of the pneumatic actuator and the upper end of the valve rod are respectively and coaxially clamped and fixed in the clamping hole.
Further, one side of the connecting block is provided with a pointer, the valve head support is provided with a dial, and the pointer and the dial are matched to indicate the lifting position of the valve rod.
The utility model also includes other components that enable normal use thereof, all as is conventional in the art, and in addition, the devices or components not defined in the utility model are all well known in the art.
The beneficial effects of the utility model are as follows:
according to the pneumatic control valve limiting protection device, the linkage limiting protection device is additionally arranged on the pneumatic control valve, so that the problem of misoperation of automatic return of the pneumatic control valve caused by abnormality of an air source can be effectively prevented, and the expansion of production influence caused by the failure of the pneumatic control valve is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a limit protection device for a pneumatic control valve in an embodiment.
Fig. 2 is a schematic view of the structure of the support sleeve along A-A in fig. 1.
Fig. 3 is a schematic structural view of the connection block in the direction B-B in fig. 1.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments.
Examples
As shown in fig. 1, the limit protection device for the pneumatic control valve comprises a valve body 1, a valve cover 2, a valve head support 3 and a pneumatic actuator 4 of the pneumatic control valve, wherein a valve seat 5 and a valve core 6 are arranged in the valve body, the valve core is matched with the valve seat and can be opened and closed, and a valve rod 7 is connected above the valve core.
The valve cover is sealed and fixedly arranged on the valve body, the valve head support is fixedly connected to the valve cover, the pneumatic actuator is arranged above the valve head support, the upper end of the valve rod coaxially penetrates through the valve cover and the valve head support and is connected with the acting end of the pneumatic actuator through a connecting block 8, the pneumatic actuator drives the valve core to open and close through the valve rod, and the connecting block is positioned in the middle of the valve head support.
The valve head support one side is provided with the traction electromagnet, the flexible end of traction electromagnet is provided with the supporting sleeve 9 that can pass in and out the support connecting block, be provided with compression spring 10 between supporting sleeve and the valve head support, install air pressure sensor 11 on the pneumatic actuator, the valve head support opposite side is provided with controller 12, air pressure sensor and traction electromagnet all are connected with the controller electricity, and the controller simultaneously controls the switching action of pneumatic control valve, and the traction electromagnet realizes the linkage with pneumatic control valve through the controller, under the circumstances that the pneumatic control valve is normally opened of controller control pneumatic control valve, once air pressure sensor detects that atmospheric pressure is unusual to reduce below the settlement threshold value, can control traction electromagnet release its push-and-pull rod, compression spring can release rapidly, drives the supporting sleeve and supports in the connecting block below, prevents valve rod and case and continues to descend, avoids pneumatic control valve to close abnormally.
The pneumatic regulating valve is an air-open regulating valve, a pneumatic diaphragm 13 is arranged in the pneumatic actuator, a pressing spring 14 is arranged above the pneumatic diaphragm, an air chamber 15 is arranged below the pneumatic diaphragm, and an air inlet 16 and an air outlet 17 are arranged in the air chamber. The air-opening type regulating valve is a normally closed regulating valve, under the condition of no ventilation, the pneumatic regulating valve is closed, the pneumatic regulating valve can be opened during ventilation, under the condition of insufficient air pressure of an air source or sudden air interruption, the pneumatic regulating valve can be automatically closed under the action of a downward-pressure spring, and the supporting sleeve is arranged for preventing the pneumatic regulating valve from being abnormally closed.
As shown in fig. 2, the supporting sleeve is a circular tube with a section of axis parallel to the valve rod, an opening 18 for the valve rod to enter and exit is formed in one side of the circular tube facing the valve rod, a slope surface is formed in the upper portion of the opening, and a serrated surface 19 is arranged on the slope surface, so that friction resistance between the connecting block and the supporting sleeve can be increased, and reliability of the supporting sleeve for blocking and supporting the connecting block is improved.
The traction electromagnet is a push-pull electromagnet, a shell 20 of the traction electromagnet is fixedly connected to the outer side of the valve head support, a telescopic end of a push-pull rod 21 of the traction electromagnet extends to the inner side of the traction electromagnet and is fixedly connected with a supporting sleeve, an armature 22 is arranged in the shell, the push-pull rod is connected with the armature, an electromagnetic coil 23 is arranged at the bottom of the shell, magnetic force is generated when the electromagnetic coil is electrified, the armature is sucked to pull the push-pull rod, the electromagnetic coil is powered off, the magnetic force disappears, and the push-pull rod can be rapidly pushed out under the action of a compression spring to drive the supporting sleeve to be held on the outer side of a valve rod below the connecting block.
As shown in fig. 3, a collapsible clamping hole is formed in the middle of the connecting block, and the acting end of the pneumatic actuator and the upper end of the valve rod are respectively and coaxially clamped and fixed in the clamping hole. The connecting block is a rectangular metal block, a expansion joint 24 is arranged in the middle of the connecting block, two semicircular arc clamping grooves 25 are symmetrically arranged on two sides of the expansion joint, and expandable clamping holes are formed on the opposite surfaces of the two clamping grooves.
One side of the connecting block is provided with a pointer 26, the valve head support is provided with a dial 27, and the pointer and the dial cooperate to indicate the lifting position of the valve rod. The pointer and the dial are conventional settings of the pneumatic control valve, the pointer and the dial are both in the prior art, and the specific settings are not described herein.
The technical solution of the present utility model is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications made within the spirit and principles of the present utility model fall within the scope of the present utility model.
Claims (6)
1. A limit protection device of a pneumatic control valve is characterized in that: including pneumatic control valve's valve body, valve gap, valve head support and pneumatic actuator, be provided with disk seat and case in the valve body, but case and disk seat cooperation switch conflict, but the case top is connected with the valve rod, the valve gap seals and sets up on the valve body, valve head support fixed connection is on the valve gap, pneumatic actuator installs in valve head support top, the upper end of valve rod passes valve gap and valve head support coaxially and is connected with pneumatic actuator's effect end through the connecting block, and pneumatic actuator passes through valve rod drive case switching action, the connecting block is located the valve head support centre, and valve head support one side is provided with the traction electromagnet, and the flexible end of traction electromagnet is provided with the support cover that can pass in and out the support connecting block, is provided with compression spring between support cover and the valve head support, installs air pressure sensor on the pneumatic actuator, and the valve head support opposite side is provided with the controller, air pressure sensor and traction electromagnet all are connected with the controller electricity.
2. The pneumatic regulator valve limit protector of claim 1, wherein: the pneumatic adjusting valve is an air-open type adjusting valve, a pneumatic diaphragm is arranged in the pneumatic actuator, a pressing spring is arranged above the pneumatic diaphragm, an air chamber is arranged below the pneumatic diaphragm, and an air inlet and an air outlet are formed in the air chamber.
3. The pneumatic regulator valve limit protector of claim 1, wherein: the support sleeve is a circular tube with a section of axis parallel to the valve rod, an opening for the valve rod to enter and exit is formed in one side of the circular tube facing the valve rod, a slope surface is formed in the upper portion of the opening, and a serrated surface is arranged on the slope surface.
4. The pneumatic regulator valve limit protector of claim 1, wherein: the traction electromagnet is a push-pull electromagnet, the shell of the traction electromagnet is fixedly connected to the outer side of the valve head support, and the telescopic end of the push-pull rod of the traction electromagnet extends to the inner side and is fixedly connected with the support sleeve.
5. The pneumatic regulator valve limit protector of claim 1, wherein: a clamping hole capable of expanding and contracting is formed in the middle of the connecting block, and the acting end of the pneumatic actuator and the upper end of the valve rod are respectively and coaxially clamped and fixed in the clamping hole.
6. The pneumatic regulator valve limit protector of claim 1, wherein: one side of the connecting block is provided with a pointer, the valve head support is provided with a dial, and the pointer and the dial cooperate to indicate the lifting position of the valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321834285.XU CN220688046U (en) | 2023-07-12 | 2023-07-12 | Limiting and protecting device for pneumatic regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321834285.XU CN220688046U (en) | 2023-07-12 | 2023-07-12 | Limiting and protecting device for pneumatic regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220688046U true CN220688046U (en) | 2024-03-29 |
Family
ID=90375717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321834285.XU Active CN220688046U (en) | 2023-07-12 | 2023-07-12 | Limiting and protecting device for pneumatic regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220688046U (en) |
-
2023
- 2023-07-12 CN CN202321834285.XU patent/CN220688046U/en active Active
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