A kind of pneumatic regulating valve limiting protection device
Patent Information
- Application Number
- CN202522366301.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-07
AI Technical Summary
[0004]为了弥补以上不足，本实用新型提供了一种气动调节阀限位保护装置，旨在改善了现有技术中“因气源异常或断气，如此会导致气动调节阀自动回位”的问题
1.本实用新型中，通过阀体内壁设置的伸缩组件和限位组件，当气压出现异常，控制器控制装置会自动断电，此时失电磁铁恢复磁力，带动衔铁沿限位杆向阀体中心滑动，通过铰接杆拉动滑动块沿阀杆上移，待衔铁滑动到指定位置，第三弹簧借助弹性复位力，推动滑块卡入卡槽，如此可以稳固衔铁，又能让滑动块顶住指针，防止阀杆自动回落，提升了整体装置的稳定性，消除了给危化品输送场景等带来的安全隐患。
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Figure CN224919899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic control valves, and in particular to a limit protection device for pneumatic control valves. Background Technology
[0002] Pneumatic control valves are commonly used instrument control devices in the petrochemical and other hazardous chemical industries. They can regulate fluids through remote operation or automatic control systems, and have advantages such as high precision, wide adjustment range, and rapid response. They can meet the precise and automated fluid control needs in industrial scenarios and play an important role in ensuring the stability and safety of production processes.
[0003] Existing pneumatic control valves are mostly used in hazardous chemical fields such as petrochemicals, where the working environment is harsh. When encountering emergencies such as compressed air shortage or unstable air source pressure, the valve stem of the pneumatic control valve loses power support, causing the valve core to automatically fall back to its original state, resulting in valve malfunction. This may not only disrupt the normal production process, but also cause fluid control failure, which may seriously affect the production stability and equipment safety of the entire plant, and bring safety hazards to scenarios such as hazardous chemical transportation. Utility Model Content
[0004] To overcome the above deficiencies, this utility model provides a pneumatic regulating valve limit protection device, which aims to improve the problem in the prior art that "the pneumatic regulating valve will automatically return to its original position due to abnormal or interrupted air supply".
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pneumatic regulating valve limit protection device, comprising a valve body, a controller provided at the left end of the valve body, a first valve head bracket connected to the upper surface of the valve body, a second valve head bracket fixedly connected to the lower surface of the valve body, a valve seat fixedly provided on the lower surface of the second valve head bracket, a valve stem slidably connected through the inner wall of the valve body, a valve core fixedly connected to the lower surface of the valve stem, a telescopic component provided on the inner wall of the valve body, and a limit component provided on the inner wall of the valve body; The telescopic assembly includes a sliding block slidably connected to the outer wall of the valve stem. Hinges are hinged to both the left and right sides of the outer wall of the sliding block. An armature is hinged to the right end of each hinge rod. A limit rod is slidably connected to the inner wall of the armature. A limit block is fixedly connected to the right end of the limit rod. The armature is elastically connected to the inner wall of the valve body via a second spring. A de-electromagnet is fixedly connected to the left end of the limit rod. A slot is provided on the lower surface of the armature.
[0006] As a further description of the above technical solution: The left end of the limiting rod is fixedly connected to the inner wall of the valve body, and the limiting block is fixedly connected to the inner wall of the valve body.
[0007] As a further description of the above technical solution: The limiting component includes a sliding sleeve, which is fixedly connected to the inner wall of the valve body. A slider is slidably connected to the inner wall of the sliding sleeve. A connecting rod is fixedly connected to the lower surface of the slider. The connecting rod is slidably connected to the inner wall of the sliding sleeve. The sliding block is inserted into the inner wall of the slot.
[0008] As a further description of the above technical solution: The lower end of the connecting rod is fixedly connected to a movable block, and the slider is elastically connected to the inner wall of the sliding sleeve through a third spring.
[0009] As a further description of the above technical solution: A first valve cover is fixedly connected to the upper surface of the first valve head bracket, a second valve cover is fixedly connected to the upper surface of the first valve cover, a pressure sensor is provided on the upper surface of the second valve cover, a support block is fixedly connected to the upper surface of the valve stem, a diaphragm is provided on the outer wall of the support block, the support block is elastically connected to the upper surface of the valve body through a first spring, a pointer is fixedly connected to the outer wall of the valve stem, and a scale is fixedly connected to the inner wall of the valve body.
[0010] As a further description of the above technical solution: The valve core slides on the inner wall of the valve seat, the inner wall of the valve body is fixedly connected to a limit sleeve, and the valve stem is slidably connected to the inner wall of the limit sleeve.
[0011] As a further description of the above technical solution: The upper end of the slider is designed with an inclined structure.
[0012] As a further description of the above technical solution: The inner wall of the slot is designed with an inclined structure.
[0013] This utility model has the following beneficial effects: 1. In this utility model, through the telescopic component and the limiting component set on the inner wall of the valve body, when the air pressure is abnormal, the controller control device will automatically cut off the power. At this time, the electromagnet will regain its magnetic force, driving the armature to slide along the limiting rod towards the center of the valve body. The sliding block will be pulled up along the valve stem by the hinge rod. When the armature slides to the designated position, the third spring will push the slider into the slot with the help of the elastic restoring force. This can stabilize the armature and allow the sliding block to hold the pointer, preventing the valve stem from falling back automatically, improving the stability of the overall device and eliminating the safety hazards brought to hazardous chemical transportation scenarios. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2This is a three-dimensional cross-sectional view of the first valve head bracket in this utility model; Figure 3 This is a three-dimensional cross-sectional view of the second valve head bracket in this utility model; Figure 4 This is a three-dimensional cross-sectional view of the telescopic component in this utility model; Figure 5 This is a three-dimensional cross-sectional view of the limiting component in this utility model.
[0015] Legend: 1. Valve body; 2. Telescopic assembly; 21. Sliding block; 22. Hinge rod; 23. Armature; 24. Limiting rod; 25. Second spring; 26. Electromagnet; 27. Limiting block; 28. Slot; 3. Limiting assembly; 31. Sliding sleeve; 32. Slider; 33. Connecting rod; 34. Third spring; 35. Movable block; 4. First valve head bracket; 5. First valve cover; 6. Second valve cover; 7. Pressure sensor; 8. Second valve head bracket; 9. Valve seat; 10. Diaphragm; 11. Valve stem; 12. Support block; 13. First spring; 14. Pointer; 15. Dial; 16. Limiting sleeve; 17. Valve core; 18. Controller. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Reference Figure 1 - Figure 3This utility model provides an embodiment of a pneumatic regulating valve limit protection device, comprising a valve body 1, which serves as the mounting base for all components and provides an internal chamber for the sliding of the valve stem 11 and assembly of components. A controller 18 is located at the left end of the valve body 1, controlling the energization state based on the detection status of a pressure sensor 7. A first valve head bracket 4 is connected to the upper surface of the valve body 1, supporting a first valve cover 5 and providing mounting space for the diaphragm 10 and spring assembly at the upper end of the valve stem 11. A second valve head bracket 8 is fixedly connected to the lower surface of the valve body 1, connecting to a valve seat 9 via bolts to achieve a sealed fixation between the valve seat 9 and the valve body 1, preventing fluid from flowing through. Leakage occurs at the connection between valve seat 9 and valve body 1. Valve seat 9 is fixed to the lower surface of the second valve head bracket 8. Valve stem 11 is slidably connected through the inner wall of valve body 1. Valve stem 11 is the core transmission component for transmitting power and receiving limit positions. Valve core 17 is fixedly connected to the lower surface of valve stem 11. Valve core 17 is used to adjust the fluid flow rate by changing the gap between valve core 17 and valve seat 9. A telescopic assembly 2 is provided on the inner wall of valve body 1. The telescopic assembly 2 is used to limit valve stem 11 to prevent malfunction when the air source is abnormal. A limit assembly 3 is provided on the inner wall of valve body 1. The limit assembly 3 is used to prevent armature 23 from moving left or right accidentally after demagnetization when energized. The telescopic assembly 2 includes a sliding block 21, which is used to... The fixed relationship between needle 14 and valve stem 11 restricts the downward movement of valve stem 11. Sliding block 21 is slidably connected to the outer wall of valve stem 11. Hinged rods 22 are hinged to both the left and right sides of the outer wall of sliding block 21. Hinged rods 22 are used to convert the horizontal sliding of armature 23 into the vertical upward movement of sliding block 21, realizing the conversion of power direction. Armature 23 is hinged to the right end of hinge rod 22. When armature 23 slides under the attraction force of electromagnet 26, it drives hinge rod 22 to move. At the same time, it locks itself by cooperating with slider 32 of limit component 3 through slot 28. Limit rod 24 is slidably connected to the inner wall of armature 23. Limit rod 24 is used to limit the sliding track of armature 23 and prevent the armature 23 from deviating and causing the transmission of the hinge rod 22. In case of motion failure, the right end of the limiting rod 24 is fixedly connected to the limiting block 27. The limiting block 27 is used to prevent the armature 23 from moving excessively and causing the hinge rod 22 to extend excessively. The armature 23 is elastically connected to the inner wall of the valve body 1 through the second spring 25. The second spring 25 is used to prevent the armature 23 from colliding with the demagnetizer 26 due to excessive magnetic force. The left end of the limiting rod 24 is fixedly connected to the demagnetizer 26. The demagnetizer 26 is used to restore the magnetic force when the whole device is de-energized, generating an attraction force towards the center of the valve body 1, pulling the armature 23 to slide. The lower surface of the armature 23 is provided with a slot 28. The slot 28 is used to restrict the sliding of the armature 23 after the slider 32 is inserted into the inner wall of the slot 28, thereby locking the position of the armature 23.
[0017] Reference Figure 1 - Figure 3The left end of the limiting rod 24 is fixedly connected to the inner wall of the valve body 1, and the limiting block 27 is fixedly connected to the inner wall of the valve body 1. The limiting assembly 3 includes a sliding sleeve 31, which restricts the slider 32 to slide only vertically to prevent the slider 32 from shifting and failing to insert into the slot 28. The sliding sleeve 31 is fixedly connected to the inner wall of the valve body 1, and the slider 32 is slidably connected to the inner wall of the sliding sleeve 31. When the armature 23 slides to the designated position, the slider 32 is pushed down by the armature 23 and compresses the third spring 34. Then, under the elastic force of the third spring 34, the slider moves up and embeds into the slot 28, forming a mechanical limit and locking the position of the armature 23. A connecting rod 33 is fixedly connected to the lower surface of the slider 32. The connecting rod 33 is used by the operator to pull the movable block 35 while driving the slider 32 to move downward, realizing transmission. Due to the force transfer, the connecting rod 33 is slidably connected to the inner wall of the sliding sleeve 31, the sliding block 21 is inserted into the inner wall of the slot 28, and the lower end of the connecting rod 33 is fixedly connected to the movable block 35. The movable block 35 is used to facilitate the operator to manually release the restriction on the armature 23. The slider 32 is elastically connected to the inner wall of the sliding sleeve 31 through the third spring 34. The third spring 34 is used to store elastic potential energy. The upper surface of the first valve head bracket 4 is fixedly connected to the first valve cover 5. The first valve cover 5 is used to protect the internal diaphragm 10 and the support block 12 from external impurities. The upper surface of the first valve cover 5 is fixedly connected to the second valve cover 6. The second valve cover 6 is used to protect the internal diaphragm 10 and the support block 12 from external impurities. The upper surface of the second valve cover 6 is provided with a pressure sensor 7. The pressure sensor 7 is used to monitor the air source pressure in real time.
[0018] Reference Figure 4 - Figure 5 A support block 12 is fixedly connected to the upper surface of the valve stem 11. The support block 12 slides synchronously with the valve stem 11 and is an intermediate component that transmits the pressure of the diaphragm 10 and the elastic force of the first spring 13. A diaphragm 10 is provided on the outer wall of the support block 12. The diaphragm 10 is used to adjust the valve stem 11 by detecting the gas source status. The support block 12 is elastically connected to the upper surface of the valve body 1 through the first spring 13, which is used to store elastic potential energy. A pointer 14 is fixedly connected to the outer wall of the valve stem 11. The pointer 14 is used to directly point the scale to the dial 15 for easy operation. A scale 15 is fixedly connected to the inner wall of the valve body 1 for the operator to observe the status. The scale 15 is used to visually determine the current position of the valve stem 11 and the valve core 17 by the scale pointed to by the pointer 14, which is convenient for the operator to observe the status of the device. The valve core 17 slides on the inner wall of the valve seat 9. A limit sleeve 16 is fixedly connected to the inner wall of the valve body 1. The limit sleeve 16 is used to limit the position of the valve stem 11 and prevent the valve stem 11 from tilting left and right. The valve stem 11 is slidably connected to the inner wall of the limit sleeve 16. The upper end of the slider 32 is set with an inclined structure, and the inner wall of the slot 28 is set with an inclined structure.
[0019] Working principle: When the air pressure sensor 7 detects abnormal conditions such as compressed air shortage or sudden drop in air source pressure, the air pressure sensor 7 detects that the air source pressure is lower than the set threshold. It then transfers the information to the controller 18 and immediately controls the device to automatically cut off power, initiating the protection program. After power failure, the electromagnet 26 regains its magnetic force, and the attraction force pointing towards the center of the valve body 1 relaxes the elastic force of the second spring 25, thus preventing the armature 23 from impacting and damaging the electromagnet 26. This pulls the armature 23 along the limit rod 24 towards the center of the valve body 1. When the armature 23 slides, the hinge rod 22 hinged to the left side of the armature 23 rotates and retracts accordingly, generating an upward pulling force on the sliding block 21 through the hinge point, causing the sliding block 21 to move vertically upward along the outer wall of the valve stem 11 until the upper surface of the sliding block 21 contacts the lower surface of the pointer 14. After the sliding block 21 presses against the pointer 14, the fixed connection between the pointer 14 and the valve stem 11 prevents the valve stem 11 from automatically falling back due to the loss of air power, thus preventing the valve core 17 from falling back to its original state with the valve stem 11.
[0020] When the armature 23 slides along the limiting rod 24 to the preset protection position, its lower end face contacts the inclined upper end face of the slider 32 in the limiting component 3. Under the pushing force of the continuous sliding of the armature 23, the inclined surface forms a forced guide, causing the slider 32 to slide vertically downward along the inner wall of the sliding sleeve 31. The downward movement of the slider 32 directly generates a squeezing force on the third spring 34 connected above, causing the third spring 34 to compress and deform and store elastic potential energy. As the armature 23 continues to slide to the position where the slot 28 is aligned with the slider 32, the inner wall of the slot 28 is also an inclined structure, which is adapted to the inclined upper end face of the slider 32, further guiding the slider 32 to smoothly embed into the slot 28, and finally forming a reliable mechanical limiting structure. After the position of the armature 23 is fixed, the hinge rod 22 maintains an upward pulling force on the sliding block 21, so that the sliding block 21 continuously presses against the pointer 14, thereby stabilizing the position of the valve stem 11, completely preventing the valve from malfunctioning due to the automatic fall of the valve stem 11, and ensuring the stability and safety of the production process in scenarios such as the transportation of hazardous chemicals.
[0021] When the gas source pressure returns to normal, the gas pressure sensor 7 detects that the pressure meets the standard, the system control device is re-energized, the electromagnet 26 loses its magnetism again, the adsorption force disappears, the second spring 25 relaxes, and the operator first pulls out the movable block 35. While pulling out the movable block 35, the connecting rod 33, which is fixedly connected to the movable block 35, drives the slider 32 to move vertically downward along the inner wall of the sliding sleeve 31. During the downward movement of the slider 32, it will exert a squeezing effect on the third spring 34, causing the third spring 34 to compress and deform. At this time, the slider 3... 2. Completely disengage from the slot 28 at the bottom of the armature 23. This releases the restriction on the armature 23 and pushes it back to the limit block 27 along the limit rod 24. The armature 23 drives the hinge rod 22 to unfold, and the sliding block 21 moves down along the valve stem 11, releasing the pressure on the pointer 14. After the armature 23 has completed its reset, the operator releases the movable block 35. The compressed third spring 34 releases its elastic reset force, pushing the slider 32 to move upward along the inner wall of the sliding sleeve 31 until the slider 32 returns to its initial standby position.
[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A pneumatic regulating valve limit protection device, comprising a valve body (1), characterized in that: A controller (18) is provided at the left end of the valve body (1). A first valve head bracket (4) is connected to the upper surface of the valve body (1). A second valve head bracket (8) is fixedly connected to the lower surface of the valve body (1). A valve seat (9) is fixed to the lower surface of the second valve head bracket (8). A valve stem (11) is slidably connected through the inner wall of the valve body (1). A valve core (17) is fixedly connected to the lower surface of the valve stem (11). A telescopic component (2) is provided on the inner wall of the valve body (1). A limit component (3) is provided on the inner wall of the valve body (1). The telescopic assembly (2) includes a sliding block (21), which is slidably connected to the outer wall of the valve stem (11). The left and right sides of the outer wall of the sliding block (21) are hinged with hinge rods (22). The right end of the hinge rod (22) is hinged with an armature (23). The inner wall of the armature (23) is slidably connected with a limit rod (24). The right end of the limit rod (24) is fixedly connected with a limit block (27). The armature (23) is elastically connected to the inner wall of the valve body (1) through a second spring (25). The left end of the limit rod (24) is fixedly connected with a de-electromagnet (26). The lower surface of the armature (23) is provided with a slot (28).
2. The pneumatic regulating valve limit protection device according to claim 1, characterized in that: The left end of the limiting rod (24) is fixedly connected to the inner wall of the valve body (1), and the limiting block (27) is fixedly connected to the inner wall of the valve body (1).
3. The pneumatic regulating valve limit protection device according to claim 1, characterized in that: The limiting component (3) includes a sliding sleeve (31), which is fixedly connected to the inner wall of the valve body (1). A slider (32) is slidably connected to the inner wall of the sliding sleeve (31). A connecting rod (33) is fixedly connected to the lower surface of the slider (32). The connecting rod (33) is slidably connected to the inner wall of the sliding sleeve (31). The sliding block (21) is inserted into the inner wall of the slot (28).
4. The pneumatic regulating valve limit protection device according to claim 3, characterized in that: The lower end of the connecting rod (33) is fixedly connected to a movable block (35), and the slider (32) is elastically connected to the inner wall of the sliding sleeve (31) through a third spring (34).
5. The pneumatic regulating valve limit protection device according to claim 1, characterized in that: A first valve cover (5) is fixedly connected to the upper surface of the first valve head bracket (4), a second valve cover (6) is fixedly connected to the upper surface of the first valve cover (5), a pressure sensor (7) is provided on the upper surface of the second valve cover (6), a support block (12) is fixedly connected to the upper surface of the valve stem (11), a diaphragm (10) is provided on the outer wall of the support block (12), the support block (12) is elastically connected to the upper surface of the valve body (1) through a first spring (13), a pointer (14) is fixedly connected to the outer wall of the valve stem (11), and a dial (15) is fixedly connected to the inner wall of the valve body (1).
6. The pneumatic regulating valve limit protection device according to claim 1, characterized in that: The valve core (17) slides on the inner wall of the valve seat (9), the inner wall of the valve body (1) is fixedly connected to the limit sleeve (16), and the valve stem (11) slides on the inner wall of the limit sleeve (16).
7. The pneumatic regulating valve limit protection device according to claim 3, characterized in that: The upper end of the slider (32) is configured as an inclined structure.
8. The pneumatic regulating valve limit protection device according to claim 1, characterized in that: The inner wall of the slot (28) is set as an inclined structure.