A stop valve with buffer function

Abstract

This utility model discloses a stop valve with a buffer function, including a valve body, a sealing flange fixedly installed on the top of the valve body, a flange sealing plate fixedly installed on the top of the sealing flange by bolts, a buffer assembly arranged inside the valve body, a top rod slidably connected to the upper end inside the sealing cylinder, a damper and a spring located inside the sealing cylinder, and a valve disc fixedly installed at the bottom of the bottom rod. This utility model relates to the field of stop valve technology. This stop valve with a buffer function, by setting a buffer assembly, utilizes the damper and spring to achieve buffering during the closing or opening of the valve disc, reducing the impact force between the valve disc and the sealing ring, reducing component wear, and extending the service life of the valve. The damper provides damping force, slowing down the relative movement speed of the bottom rod and the top rod; the spring provides elastic buffering, absorbing part of the impact force. The combined use of both provides a better buffering effect.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve with a buffer function. Background Technology

[0002] A gate valve is a type of valve that uses a valve stem to drive a valve core (usually a disc or cone) to move up and down along the center line of the valve seat to open or close the flow of media in a pipeline. Its core structure includes a valve body, valve cover, valve stem, valve core, and valve seat. Its excellent sealing performance is a significant advantage. When closed, the valve core and valve seat fit tightly together, which can effectively prevent backflow of media. Therefore, it is widely used in pipeline systems such as tap water, petroleum, and chemical industries that require strict control of the flow of media.

[0003] Traditional gate valves experience significant impact forces between the valve disc and seat during operation, which can easily cause wear on valve components and shorten the valve's service life. This impact force is particularly pronounced when conveying high-pressure fluids or fluids containing impurities, affecting not only the valve's sealing performance but also potentially causing pipeline vibration and noise.

[0004] Therefore, this utility model provides a stop valve with a buffer function to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a stop valve with a buffer function, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stop valve with a buffer function, comprising a valve body, a sealing flange fixedly installed on the top of the valve body, a flange sealing plate fixedly installed on the top of the sealing flange by bolts, a buffer assembly provided inside the valve body, a limit bracket fixedly installed on the top of the flange sealing plate, a sealing cylinder fixedly installed inside the flange sealing plate and the limit bracket, the buffer assembly comprising a bottom rod and a top rod, a damper fixedly installed between the bottom rods, a spring fixedly installed between the bottom rods and the top rod and outside the damper, the bottom rod slidably connected to the lower end inside the sealing cylinder, the top rod slidably connected to the upper end inside the sealing cylinder, the damper and the spring located inside the sealing cylinder, and a valve disc fixedly installed at the bottom of the bottom rod.

[0007] Preferably, the valve body includes an inlet chamber and a drain chamber, both of which are located inside the valve body. A connecting hole is provided between the inlet chamber and the connecting hole, and a sealing ring is fixedly installed inside the connecting hole. The valve disc is inserted into the sealing ring.

[0008] Preferably, a limiting rod is fixedly installed at the bottom of the top rod, and a limiting groove is formed at the top of the bottom rod, with the limiting rod inserted into the corresponding limiting groove.

[0009] Preferably, a support frame is fixedly installed on the outer side of the limiting frame, and a screw rod is screwed into the inside of the support frame. The bottom of the screw rod is fixedly installed on the top of the top rod.

[0010] Preferably, a handwheel is fixedly installed on the top of the screw, and the handwheel is located above the support frame.

[0011] Preferably, flanges are fixedly installed on both the left and right sides of the valve body, with the left flange communicating with the water inlet chamber and the right flange communicating with the drain chamber.

[0012] Beneficial effects

[0013] This invention provides a stop valve with a buffer function. Compared with the prior art, it has the following advantages:

[0014] 1. This gate valve with buffer function uses a buffer assembly to achieve buffering during the valve disc closing or opening process. The damper and spring work together to reduce the impact force between the valve disc and the sealing ring, reduce component wear, and extend the valve's service life. The damper provides damping force to slow down the relative movement speed of the bottom rod and the top rod; the spring acts as an elastic buffer to absorb some of the impact force. The two work together to achieve a better buffering effect.

[0015] 2. In this stop valve with buffer function, the bottom rod of the buffer assembly is slidably connected to the lower end of the sealing cylinder, and the top rod is slidably connected to the upper end of the sealing cylinder. The sealing cylinder can protect the bottom rod, top rod, damper and spring, prevent external impurities from entering and affecting the normal operation of the buffer assembly, and at the same time ensure the sealing of the working environment of the buffer assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the external structure of this utility model;

[0018] Figure 2 This is an internal cross-sectional view of the present invention;

[0019] Figure 3This is a three-dimensional view of the internal structure of this utility model;

[0020] Figure 4 This is the utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0021] In the diagram: 1. Valve body; 11. Inlet chamber; 12. Drain chamber; 13. Connecting hole; 14. Sealing ring; 2. Buffer assembly; 21. Bottom rod; 22. Valve disc; 23. Top rod; 24. Damper; 25. Spring; 26. Limiting rod; 27. Limiting groove; 3. Sealing flange; 4. Flange sealing plate; 5. Bolt; 6. Support frame; 7. Handwheel; 8. Screw; 9. Limiting frame; 10. Sealing cylinder. Detailed Implementation

[0022] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1 to 4 This application provides a stop valve with a buffer function, including a valve body 1. A sealing flange 3 is fixedly installed on the top of the valve body 1. A flange sealing plate 4 is fixedly installed on the top of the sealing flange 3 by bolts 5. A buffer assembly 2 is provided inside the valve body 1. A limit frame 9 is fixedly installed on the top of the flange sealing plate 4. A sealing cylinder 10 is fixedly installed inside the flange sealing plate 4 and the limit frame 9. The buffer assembly 2 includes a bottom rod 21 and a top rod 23. A damper 24 is fixedly installed between the bottom rods 21 and the top rod 23 and is located outside the damper 24. The bottom rod 21 is slidably connected to the lower end inside the sealing cylinder 10. The top rod 23 is slidably connected to the upper end inside the sealing cylinder 10. The damper 24 and the spring 25 are located inside the sealing cylinder 10. A valve disc 22 is fixedly installed at the bottom of the bottom rod 21.

[0025] The valve body 1 includes an inlet chamber 11 and a drain chamber 12, both of which are located inside the valve body 1. A connecting hole 13 is provided between the inlet chamber 11 and the connecting hole 13. A sealing ring 14 is fixedly installed inside the connecting hole 13, and a valve disc 22 is inserted into the sealing ring 14. By setting the sealing ring 14 and the valve disc 22 to cooperate, the sealing performance of the valve is improved. When the valve disc 22 is inserted into the sealing ring 14, it can effectively prevent the fluid in the inlet chamber 11 from entering the drain chamber 12 through the connecting hole 13.

[0026] A limiting rod 26 is fixedly installed at the bottom of the top rod 23, and a limiting groove 27 is formed at the top of the bottom rod 21. The limiting rod 26 is inserted into the corresponding limiting groove 27. The cooperation between the limiting rod 26 and the limiting groove 27 plays a good guiding role in the relative movement of the top rod 23 and the bottom rod 21, preventing them from shifting during movement and ensuring the stability of the buffer assembly 2.

[0027] A support frame 6 is fixedly installed on the outside of the limit frame 9. A screw rod 8 is screwed into the inside of the support frame 6. The bottom of the screw rod 8 is fixedly installed on the top of the top rod 23. The screw rod 8 and the support frame 6 are screwed together so that rotating the screw rod 8 can drive the top rod 23 to move up and down, thereby controlling the position of the valve disc 22.

[0028] A handwheel 7 is fixedly installed on the top of the screw 8, and the handwheel 7 is located above the support frame 6. The handwheel 7 makes it easier for the operator to turn the screw 8, reducing the difficulty of operation and improving the convenience of operation.

[0029] Flanges are fixedly installed on both the left and right sides of the valve body 1. The left flange is connected to the inlet chamber 11, and the right flange is connected to the drain chamber 12. The flanges facilitate the connection of this shut-off valve to external pipelines. The connection method is simple and reliable, ensuring the sealing of fluid transportation.

[0030] Furthermore, all contents not described in detail in this specification are existing technologies known to those skilled in the art, and all electrical components mentioned in this document are powered by external power supply lines.

[0031] Working principle: When the valve needs to be closed, the operator turns the handwheel 7, which drives the screw 8 to rotate. Since the screw 8 is screwed to the support frame 6, the screw 8 moves downward while rotating, thereby causing the top rod 23 to slide downward within the sealing cylinder 10. When the top rod 23 moves downward, it applies pressure to the spring 25 and the damper 24. The spring 25 is compressed, and the damper 24 generates a damping force. Under the action of the elastic force of the spring 25 and the damping force of the damper 24, the bottom rod 21 gradually moves downward, and the valve disc 22 at the bottom of the bottom rod 21 moves downward accordingly, eventually inserting into the sealing ring 14, thus closing the valve. During this process, spring 25 and damper 24 act as a buffer, slowing down the downward movement of valve disc 22 and reducing the impact force between valve disc 22 and sealing ring 14. When the valve needs to be opened, the operator rotates handwheel 7 in the opposite direction, screw 8 drives top rod 23 upward, spring 25 and damper 24 gradually return to their original state, bottom rod 21 moves upward under the elastic force of spring 25, valve disc 22 is pulled out from inside sealing ring 14, and fluid in inlet chamber 11 enters drain chamber 12 through connecting hole 13, thus opening the valve. Similarly, during the opening process, spring 25 and damper 24 also act as a buffer, preventing the rapid movement of valve disc 22 from impacting related components.

[0032] 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.

[0033] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stop valve with a buffer function, comprising a valve body (1), characterized in that: A sealing flange (3) is fixedly installed on the top of the valve body (1). A flange sealing plate (4) is fixedly installed on the top of the sealing flange (3) by bolts (5). A buffer assembly (2) is provided inside the valve body (1). A limit frame (9) is fixedly installed on the top of the flange sealing plate (4). A sealing cylinder (10) is fixedly installed inside the flange sealing plate (4) and the limit frame (9). The buffer assembly (2) includes a bottom rod (21) and a top rod (23). The bottom rod (21) and the top rod (23) are fixedly installed on the top of the valve body (1). A damper (24) is fixedly installed between the bottom rods (21). A spring (25) is fixedly installed between the bottom rods (21) and the top rods (23) and outside the damper (24). The bottom rods (21) are slidably connected to the lower end inside the sealing cylinder (10). The top rods (23) are slidably connected to the upper end inside the sealing cylinder (10). The damper (24) and the spring (25) are located inside the sealing cylinder (10). A valve disc (22) is fixedly installed at the bottom of the bottom rods (21).

2. A stop valve with buffer function according to claim 1, characterized in that: The valve body (1) includes an inlet chamber (11) and a drain chamber (12). Both the inlet chamber (11) and the drain chamber (12) are located inside the valve body (1). A connecting hole (13) is provided between the inlet chamber (11) and the connecting hole (13). A sealing ring (14) is fixedly installed inside the connecting hole (13). The valve disc (22) is inserted into the sealing ring (14).

3. A stop valve with buffer function according to claim 1, characterized in that: A limiting rod (26) is fixedly installed at the bottom of the top rod (23), and a limiting groove (27) is opened at the top of the bottom rod (21). The limiting rod (26) is inserted into the corresponding limiting groove (27).

4. A stop valve with buffer function according to claim 1, characterized in that: A support frame (6) is fixedly installed on the outside of the limiting frame (9), and a screw rod (8) is screwed into the inside of the support frame (6). The bottom of the screw rod (8) is fixedly installed on the top of the top rod (23).

5. A stop valve with buffer function according to claim 4, characterized in that: A handwheel (7) is fixedly installed on the top of the screw (8), and the handwheel (7) is located above the support frame (6).

6. A stop valve with buffer function according to claim 1, characterized in that: Flanges are fixedly installed on both the left and right sides of the valve body (1). The left flange is connected to the water inlet chamber (11), and the right flange is connected to the drain chamber (12).

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