Corrugated pipe stop valve with novel valve seat structure

Abstract

According to the corrugated pipe stop valve with the novel valve seat structure, the valve seat assembly is detachably arranged on the valve seat mounting part of the valve cavity, so that the valve seat assembly is convenient to mount and dismount, and the sealing performance between the valve seat assembly and the valve cavity can be effectively guaranteed. A valve seat ring, a valve seat gland and a valve seat sealing gasket in the valve seat assembly are matched with one another to form a reliable sealing structure, and medium leakage is effectively prevented. In addition, due to the detachable design of the valve seat assembly, the valve seat assembly can be maintained and replaced conveniently, and the service life of the valve is prolonged. Meanwhile, the connecting structure of the valve rod and the valve element is stable and reliable, and normal opening and closing of the valve are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a bellows gate valve with a novel valve seat structure. Background Technology

[0002] In the existing technology, the valve seat of the bellows gate valve is usually integrally formed inside the valve cavity. After long-term use, the valve seat is prone to wear or damage, requiring the replacement of the entire valve body, which increases maintenance costs and difficulty. Summary of the Invention

[0003] In view of this, the present invention provides a bellows stop valve with a novel valve seat structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A bellows gate valve with a novel valve seat structure includes a valve body and a valve cover. The valve cover is disposed on the valve body, and a valve cavity is formed between the valve cover and the valve body. A valve stem is disposed on the valve body, and a valve core is disposed within the valve cavity. One end of the valve stem extends into the valve cavity and connects to the valve core. A valve seat assembly is disposed within the valve cavity. The valve seat assembly includes a valve seat ring, a valve seat gland, and a valve seat gasket. A valve seat mounting portion protrudes from the inner wall of the valve cavity, and the valve seat assembly is disposed on the valve seat mounting portion. The valve seat gland, valve seat ring, and valve seat gasket are sequentially disposed on the valve seat mounting portion from top to bottom. The valve seat gland presses the valve seat ring tightly onto the valve seat gasket, and the valve seat gasket is in sealing contact with both the valve seat mounting portion and the valve seat ring.

[0006] Preferably, a valve seat channel is formed at the center of the valve seat mounting part, and the upper part of the inner wall of the valve seat channel is recessed to form a stepped structure. The valve seat ring, valve seat gasket, and part of the valve seat gland in the valve seat assembly are disposed on the stepped structure.

[0007] Preferably, the valve seat cover has a pressure ring body, a pressure ring connecting part, and a pressing part. The pressing part protrudes from the bottom end of the pressure ring body. The pressure ring connecting part has a cylindrical structure and is disposed on the outer ring side of the pressure ring body. An external thread is provided on the outer surface of the pressure ring connecting part. A threaded annular groove is provided on the valve seat mounting part. The pressure ring connecting part extends into the threaded annular groove and is threadedly connected to the valve seat mounting part. The pressing part presses the valve seat ring.

[0008] Preferably, the bottom of the valve seat ring is recessed to form a sealing groove, and the valve seat gasket protrudes corresponding to the sealing groove to form a sealing end, and the sealing end extends into the sealing groove to seal with the valve seat ring.

[0009] Preferably, a valve core seal is provided between the valve core and the valve seat ring, the valve core seal is disposed on the valve core, and the valve seat ring has an annular sealing surface corresponding to the valve core seal, the annular sealing surface being in sealing contact with the valve core seal on the valve core.

[0010] Preferably, an annular groove is formed on the valve core, and the valve core seal is disposed in the annular groove. The valve core seal is bonded and fixed to the inner wall of the annular groove with an interference fit.

[0011] Preferably, the valve core seal is made of rubber.

[0012] The beneficial effects of this invention are as follows: by detachably mounting the valve seat assembly on the valve seat mounting part of the valve cavity, it not only facilitates the installation and disassembly of the valve seat assembly but also effectively ensures the sealing performance between the valve seat assembly and the valve cavity. The valve seat ring, valve seat gland, and valve seat gasket in the valve seat assembly cooperate to form a reliable sealing structure, effectively preventing media leakage. Furthermore, the detachable design of the valve seat assembly facilitates maintenance and replacement, extending the service life of the valve. Attached Figure Description

[0013] 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 based on these drawings without creative effort.

[0014] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle. 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 protection scope of the present utility model.

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] This utility model provides the following technical solution:

[0019] As attached Figure 1-2As shown, this utility model discloses a bellows gate valve with a novel valve seat structure, including a valve body 1 and a valve cover 2. The valve cover 2 is disposed on the valve body 1, and a valve cavity 3 is formed between the valve cover 2 and the valve body 1. A valve stem 4 is disposed on the valve body 1, and a valve core 5 is disposed in the valve cavity 3. One end of the valve stem 4 extends into the valve cavity 3 and is connected to the valve core 5. A valve seat assembly 6 is disposed in the valve cavity 3. The valve seat assembly 6 includes a valve seat ring 7, a valve seat cover 8, and a valve seat sealing gasket 9. A valve seat mounting portion 10 is formed by protrusion on the inner wall of the valve cavity 3. The valve seat assembly 6 is disposed on the valve seat mounting portion 10. The valve seat cover 8, the valve seat ring 7, and the valve seat sealing gasket 9 are disposed sequentially from top to bottom on the valve seat mounting portion 10. The valve seat cover 8 presses the valve seat ring 7 tightly onto the valve seat sealing gasket 9. The valve seat sealing gasket 9 is sealed and connected to both the valve seat mounting portion 10 and the valve seat ring 7. Specifically, in this design, by detachably mounting the valve seat assembly 6 on the valve seat mounting portion 10 of the valve cavity 3, not only is the installation and disassembly of the valve seat assembly 6 convenient, but the sealing performance between the valve seat assembly 6 and the valve cavity 3 is also effectively guaranteed. The valve seat ring 7, valve seat gland 8, and valve seat gasket 9 in the valve seat assembly 6 cooperate with each other to form a reliable sealing structure, effectively preventing media leakage. Furthermore, the detachable design of the valve seat assembly 6 facilitates its maintenance and replacement, extending the valve's service life. Simultaneously, the connection structure between the valve stem 4 and the valve core 5 is stable and reliable, ensuring the normal opening and closing of the valve.

[0020] Furthermore, a valve seat channel 11 is formed at the center of the valve seat mounting portion 10. The upper part of the inner wall of the valve seat channel 11 is recessed to form a stepped structure 12. The valve seat ring 7, valve seat gasket 9, and part of the valve seat cap 8 in the valve seat assembly 6 are disposed on the stepped structure 12. Specifically, in this embodiment, by setting the inner wall of the valve seat channel 11 into a stepped structure, the valve seat ring 7, valve seat, and valve seat gasket 9 can be flush with the top of the valve seat mounting portion 10 after installation, thereby lowering the center of gravity of the valve seat assembly 6 and ensuring the structural stability of the valve seat assembly 6 after it is sealed to the valve core 5.

[0021] Furthermore, the valve seat cover 8 has a pressure ring body portion 12, a pressure ring connecting portion 13, and a pressing portion 14. The pressing portion 14 protrudes from the bottom end of the pressure ring body portion 12. The pressure ring connecting portion 13 has a cylindrical structure and is disposed on the outer ring side of the pressure ring body portion 12. An external thread is provided on the outer surface of the pressure ring connecting portion 13. A threaded annular groove 15 is provided on the valve seat mounting portion 10. The pressure ring connecting portion 13 extends into the threaded annular groove 15 and is threadedly connected to the valve seat mounting portion 10. The pressing portion 14 presses the valve seat ring 7. Specifically, in this embodiment, by designing the valve seat cover 8 with a structure having a pressure ring body portion 12, a pressure ring connecting portion 13, and a pressing portion 14, the valve seat cover 8 can be stably connected to the valve seat mounting portion 10 and ensure effective pressing of the valve seat ring 7. The cylindrical structure and external thread design of the pressure ring connection part 13, in conjunction with the threaded groove 15 on the valve seat mounting part 10, achieve a threaded connection between the valve seat cover 8 and the valve seat mounting part 10. This connection method is not only structurally stable but also facilitates installation and disassembly. The clamping part 14 protrudes from the bottom end of the pressure ring body part 12, directly clamping the valve seat ring 7 to ensure the sealing performance between the valve seat ring 7, the valve seat gasket 9, and the valve seat mounting part 10. Simultaneously, this design also ensures the stability of the valve seat assembly 6 after installation, further improving the overall performance and service life of the valve.

[0022] Furthermore, the bottom of the valve seat ring 7 is recessed to form a sealing groove 16, and the valve seat gasket 9 protrudes corresponding to the sealing groove 16 to form a sealing end 17. The sealing end 17 extends into the sealing groove 16 and seals with the valve seat ring 7. Specifically, in this embodiment, by designing the bottom of the valve seat ring 7 as a recessed sealing groove 16 structure, and cooperating with the sealing end 17 on the valve seat gasket 9, a precise seal between the valve seat ring 7 and the valve seat gasket 9 is achieved. This sealing method not only increases the sealing area and improves the sealing effect, but also makes the sealing structure more stable and reliable. The tight fit between the sealing groove 16 and the sealing end 17 effectively prevents the medium from leaking from the valve seat assembly 6, ensuring the valve's sealing performance. At the same time, this design also facilitates the installation and removal of the valve seat gasket 9, improving the valve's maintainability.

[0023] Furthermore, a valve core seal 18 is provided between the valve core 5 and the valve seat ring 7. The valve core seal 18 is disposed on the valve core 5, and the valve seat ring 7 has an annular sealing surface 19 corresponding to the valve core seal 18. The annular sealing surface 19 is in sealing contact with the valve core seal 18 on the valve core 5. Specifically, in this embodiment, by providing a valve core seal 18 between the valve core 5 and the valve seat ring 7, the sealing performance of the valve is further enhanced. The valve core seal 18 fits tightly against the valve core 5 and forms a reliable sealing structure with the annular sealing surface 19 on the valve seat ring 7. This design effectively prevents leakage of the medium between the valve core 5 and the valve seat ring 7, ensuring the sealing performance of the valve in the closed state.

[0024] Furthermore, an annular groove 20 is formed on the valve core 5, and the valve core seal 18 is disposed within the annular groove 20. The valve core seal 18 is bonded and fixed to the inner wall of the annular groove 20 with an interference fit. Specifically, in this embodiment, by forming an annular groove on the valve core 5 and placing the valve core seal 18 within the annular groove, a stable connection between the valve core seal 18 and the valve core 5 is achieved. The bonding and interference fit between the valve core seal 18 and the inner wall of the annular groove ensures that the valve core seal 18 will not loosen or fall off after installation, further improving the sealing performance and stability of the valve.

[0025] Furthermore, the valve core seal 18 is made of rubber. Specifically, in this embodiment, the valve core seal 18 is made of rubber, which can effectively improve the sealing performance and wear resistance of the valve core seal 18. The rubber material has good elasticity and sealing properties, and can fit tightly against the sealing surfaces of the valve core 5 and the valve seat ring 7 to form a reliable sealing structure.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bellows gate valve with a novel valve seat structure, comprising a valve body and a valve cover, wherein the valve cover is disposed on the valve body, a valve cavity is formed between the valve cover and the valve body, a valve stem is disposed on the valve body, a valve core is disposed within the valve cavity, and one end of the valve stem extends into the valve cavity and connects to the valve core, characterized in that: A valve seat assembly is provided inside the valve cavity. The valve seat assembly includes a valve seat ring, a valve seat cover, and a valve seat gasket. A valve seat mounting portion protrudes from the inner wall of the valve cavity. The valve seat assembly is mounted on the valve seat mounting portion. The valve seat cover, valve seat ring, and valve seat gasket are arranged sequentially from top to bottom on the valve seat mounting portion. The valve seat cover presses the valve seat ring tightly onto the valve seat gasket. The valve seat gasket is in sealing contact with both the valve seat mounting portion and the valve seat ring.

2. The bellows gate valve with a novel valve seat structure according to claim 1, characterized in that: A valve seat channel is opened at the center of the valve seat mounting part. The upper part of the inner wall of the valve seat channel is recessed to form a stepped structure. The valve seat ring, valve seat gasket, and part of the valve seat cover in the valve seat assembly are set on the stepped structure.

3. The bellows gate valve with a novel valve seat structure according to claim 2, characterized in that: The valve seat cover has a pressure ring body, a pressure ring connecting part, and a pressing part. The pressing part protrudes from the bottom end of the pressure ring body. The pressure ring connecting part has a cylindrical structure and is disposed on the outer ring side of the pressure ring body. An external thread is provided on the outer surface of the pressure ring connecting part. A threaded ring groove is provided on the valve seat mounting part. The pressure ring connecting part extends into the threaded ring groove and is threadedly connected to the valve seat mounting part. The pressing part presses the valve seat ring.

4. The bellows gate valve with a novel valve seat structure according to claim 2, characterized in that: The bottom of the valve seat ring is recessed to form a sealing groove, and the valve seat sealing gasket protrudes to form a sealing end corresponding to the sealing groove. The sealing end extends into the sealing groove and seals with the valve seat ring.

5. The bellows gate valve with a novel valve seat structure according to claim 1, characterized in that: A valve core seal is provided between the valve core and the valve seat ring. The valve core seal is disposed on the valve core. The valve seat ring has an annular sealing surface corresponding to the valve core seal. The annular sealing surface is in sealing contact with the valve core seal on the valve core.

6. The bellows gate valve with a novel valve seat structure according to claim 5, characterized in that: The valve core has an annular groove, and the valve core seal is disposed in the annular groove. The valve core seal is bonded and fixed to the inner wall of the annular groove with an interference fit.

7. The bellows gate valve with a novel valve seat structure according to claim 6, characterized in that: The valve core seal is made of rubber.

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