Valve element structure of pneumatic valve

Abstract

The utility model discloses a pneumatic valve core structure which comprises a valve body and a valve cover, a first threaded rod is in threaded connection with the interior of the valve cover, connecting rods are fixedly connected with the upper end and the lower end of the first threaded rod, a handle is fixedly connected with the upper portion of the connecting rod on the upper side, and a damping rod is fixedly connected with the lower portion of the connecting rod on the lower side. The lower portion of the damping rod is fixedly connected with a connecting cylinder, the damping rod and the connecting rod are sleeved with the connecting cylinder, a spring is fixedly connected between the connecting rod and the inner wall of the connecting cylinder, the damping rod is sleeved with the spring, the lower portion of the connecting cylinder is fixedly connected with a valve, and the interior of the valve body is fixedly connected with a supporting table matched with the valve. Water hammer force at the moment when the valve is closed can be buffered, and the valve body is prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic valve technology, specifically to a pneumatic valve core structure. Background Technology

[0002] Pneumatic valves are widely used in various industrial fields, such as chemical, petroleum, power, metallurgy, pharmaceutical, and food industries, to control the flow of liquids, gases, steam, and other media, serving functions such as regulation, flow control, and guidance. Pneumatic valves have advantages such as fast response speed, high control precision, and high pressure resistance, and are therefore widely used in industrial automation control systems.

[0003] When a pneumatic valve closes, the velocity of the water flow in the pipeline rapidly decreases from its initial value to zero. This rapid change in fluid momentum generates a huge impact force, causing the pressure at the valve to increase instantaneously. Excessive pressure may damage the valve connection. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic valve core structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic valve core structure, comprising a valve body and a valve cover, wherein a first threaded rod is threadedly connected internally to the valve cover, and connecting rods are fixedly connected to the upper and lower ends of the first threaded rod; a handle is fixedly connected to the upper part of the upper connecting rod, and a damping rod is fixedly connected to the lower part of the lower connecting rod; a connecting cylinder is fixedly connected to the lower part of the damping rod, and the connecting cylinder is sleeved on the outside of the damping rod and the connecting rod; a spring is fixedly connected between the connecting rod and the inner wall of the connecting cylinder, and the spring is sleeved on the outside of the damping rod; a valve is fixedly connected to the lower part of the connecting cylinder; and a support platform for cooperating with the valve is fixedly connected internally to the valve body.

[0006] Preferably, lifting grooves are provided on both sides of the connecting cylinder, and follower blocks are fixedly connected to both sides of the lower part of the connecting rod on the lower side, and the follower blocks are slidably connected inside the lifting grooves.

[0007] Preferably, a positioning piece is fixedly connected between the upper connecting rod and the first threaded rod.

[0008] Preferably, a first inclined platform is provided on the lower outer side of the valve, and a second inclined platform is provided on the upper part of the support platform to cooperate with the first inclined platform.

[0009] Preferably, a second threaded rod is internally threaded on one side of the valve cover, and a support ring facing the first inclined platform is rotatably connected to the lower part of the second threaded rod. A third threaded rod is internally threaded on one side of the valve cover, and a positioning hole facing the third threaded rod is opened on the upper part of the support ring.

[0010] Preferably, a flange is fixedly connected between the valve body and the valve cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses the handle to rotate the first threaded rod, causing the valve to move downwards and block the water flow. The water hammer force impacts the valve, and the valve moves upwards, compressing the damping rod and spring. This can buffer the water hammer force at the moment the valve closes, preventing damage to the valve body.

[0013] 2. This utility model also rotates the second threaded rod to make the support ring move downwards, and the support ring presses against the upper outer side of the valve. By rotating the third threaded rod, the third threaded rod moves downwards and inserts into the positioning hole, ensuring the balance of both sides of the support ring, preventing the valve from moving upwards at will, and ensuring the valve's sealing performance. Attached Figure Description

[0014] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a second-view three-dimensional structural cross-sectional view of the present invention;

[0016] Figure 3 This is a magnified view of a partial structure of the present invention from a third-view perspective.

[0017] In the diagram: 1. Valve body; 2. Valve cover; 3. First threaded rod; 4. Valve; 5. Connecting cylinder; 6. Damping rod; 7. Connecting rod; 8. Spring; 9. Lifting groove; 10. Follower block; 11. Handle; 12. Positioning plate; 13. Second threaded rod; 14. Support ring; 15. Third threaded rod; 16. Positioning hole; 17. Flange; 18. Support platform; 19. First inclined platform; 20. Second inclined platform. Detailed Implementation

[0018] 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 protection scope of the present utility model.

[0019] Please see Figure 1-3This utility model provides a technical solution: a pneumatic valve core structure, including a valve body 1 and a valve cover 2. A first threaded rod 3 is threadedly installed inside the valve cover 2. Connecting rods 7 are fixedly welded to the upper and lower ends of the first threaded rod 3. A handle 11 is fixedly welded to the upper part of the upper connecting rod 7 to facilitate rotation of the first threaded rod 3 via the handle 11. A damping rod 6 is threadedly installed at the lower part of the lower connecting rod 7. A connecting cylinder 5 is threadedly installed at the lower part of the damping rod 6. The connecting cylinder 5 is sleeved on the outside of the damping rod 6 and the connecting rod 7. The inner wall of the connecting rod 7 and the connecting cylinder 5 are fixedly connected. A spring 8 is fixedly welded to the outside of the damping rod 6. A valve 4 is fixedly welded to the lower part of the connecting cylinder 5. When the first threaded rod 3 is rotated by the handle 11, the valve 4 moves downward to block the water flow. The water hammer force impacts the valve 4. The valve 4 moves upward and compresses the damping rod 6 and the spring 8 to buffer the water hammer force and prevent the valve cover 2 from being damaged due to the impact force at the first threaded rod 3. A support platform 18 that matches the valve 4 is fixedly welded inside the valve body 1. The valve 4 contacts the support platform 18 to improve the sealing performance of the valve body 1 when it is closed.

[0020] Lifting grooves 9 are provided on both sides of the connecting cylinder 5. Follower blocks 10 are fixedly welded to both sides of the lower part of the lower connecting rod 7. The follower blocks 10 are slidably installed inside the lifting grooves 9. The follower blocks 10 can drive the connecting cylinder 5 and valve 4 to rotate through the lifting grooves 9, preventing the damping rod 6 from being loosened by driving the connecting cylinder 5 to rotate through the damping rod 6. A positioning piece 12 is fixedly welded between the upper connecting rod 7 and the first threaded rod 3 to position the first threaded rod 3 at its extreme descent position, preventing the damping rod 6 and spring 8 from being compressed when the valve 4 falls into the support platform 18 and continues to descend. A first inclined platform 19 is provided on the lower outer side of the valve 4, and a second inclined platform 20 is provided on the upper part of the support platform 18 to cooperate with the first inclined platform 19, raising the valve 4 and the support platform 18. The contact area of ​​platform 18 is increased to improve sealing performance; a second threaded rod 13 is installed on the internal thread of one side of valve cover 2, and a support ring 14 directly opposite the first inclined platform 19 is rotatably connected to the lower part of the second threaded rod 13. By rotating the second threaded rod 13, the support ring 14 moves downward and presses the upper outer side of valve 4 to prevent valve 4 from moving upward at will. A third threaded rod 15 is installed on the internal thread of one side of valve cover 2, and a positioning hole 16 directly opposite the third threaded rod 15 is opened on the upper part of the support ring 14. By rotating the third threaded rod 15, the third threaded rod 15 moves downward and inserts into the positioning hole 16 to ensure the balance of both sides of the support ring 14; a flange 17 is fixedly welded between valve body 1 and valve cover 2 to facilitate disassembly and removal of internal components.

[0021] Working principle: When in use, the first threaded rod 3 is rotated by the handle 11, causing the valve 4 to move downwards and block the water flow. The water hammer force impacts the valve 4, and the valve 4 moves upwards, which is buffered by the compression damping rod 6 and spring 8, preventing damage to the valve cover 2 due to the impact force at the first threaded rod 3. The valve 4 contacts the support platform 18, and at the same time, the positioning plate 12 is tightly attached to the upper part of the valve body 1, realizing the closure of the valve body 1. By rotating the second threaded rod 13, the support ring 14 moves downwards, and the support ring 14 presses against the upper outer side of the valve 4 to prevent the valve 4 from moving upwards at will. By rotating the third threaded rod 15, the third threaded rod 15 moves downwards and inserts into the positioning hole 16, ensuring the balance of both sides of the support ring 14.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic valve core structure, comprising a valve body (1) and a valve cover (2), characterized in that: The valve cover (2) is internally threaded with a first threaded rod (3). The first threaded rod (3) is fixedly connected to the upper and lower ends with connecting rods (7). The upper part of the connecting rod (7) is fixedly connected with a handle (11). The lower part of the connecting rod (7) is fixedly connected with a damping rod (6). The lower part of the damping rod (6) is fixedly connected with a connecting cylinder (5). The connecting cylinder (5) is sleeved on the outside of the damping rod (6) and the connecting rod (7). A spring (8) is fixedly connected between the inner wall of the connecting rod (7) and the connecting cylinder (5). The spring (8) is sleeved on the outside of the damping rod (6). The lower part of the connecting cylinder (5) is fixedly connected with a valve (4). The valve body (1) is internally fixedly connected with a support platform (18) that matches the valve (4).

2. The pneumatic valve core structure according to claim 1, characterized in that: The connecting cylinder (5) has lifting grooves (9) on both sides, and the lower connecting rod (7) has follower blocks (10) fixedly connected to both sides of the lower part. The follower blocks (10) are slidably connected inside the lifting grooves (9).

3. The pneumatic valve core structure according to claim 1, characterized in that: A positioning piece (12) is fixedly connected between the upper connecting rod (7) and the first threaded rod (3).

4. The pneumatic valve core structure according to claim 1, characterized in that: The valve (4) has a first inclined platform (19) on its lower outer side, and the support platform (18) has a second inclined platform (20) on its upper part that cooperates with the first inclined platform (19).

5. The pneumatic valve core structure according to claim 4, characterized in that: The valve cover (2) is internally threaded with a second threaded rod (13) on one side. The lower part of the second threaded rod (13) is rotatably connected to a support ring (14) facing the first inclined platform (19). The valve cover (2) is internally threaded with a third threaded rod (15) on one side. The upper part of the support ring (14) is provided with a positioning hole (16) facing the third threaded rod (15).

6. The pneumatic valve core structure according to claim 1, characterized in that: A flange (17) is fixedly connected between the valve body (1) and the valve cover (2).

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