New type of bellows gate valve

Abstract

A novel bellows gate valve, by incorporating a detachable seat ring in conjunction with sealing components, effectively improves the valve's sealing performance and prevents media leakage. Simultaneously, the detachable design of the seat ring facilitates replacement and maintenance, reducing repair costs. A seat fixing groove is provided on the seat fixing part, enhancing the stability and reliability of the seat ring installation and ensuring that the seat ring will not shift or loosen due to uneven stress during use.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a novel bellows gate valve. Background Art

[0002] In the prior art, the valve seat of a bellows gate valve usually adopts an integral design. Once the valve seat is damaged or the sealing performance deteriorates, the entire valve needs to be replaced, which not only increases the maintenance cost but also affects the reliability and service life of the valve. Summary of the Invention

[0003] In view of this, the utility model provides a novel bellows gate valve.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A novel bellows gate valve includes a valve body, a valve cover and a gate plate. The valve cover is arranged on the valve body, a valve cavity is formed between the valve cover and the valve body, the gate plate is arranged in the valve cavity, a valve rod is arranged on the valve body, one end of the valve rod extends into the valve cavity and is connected to the gate plate. A valve seat fixing part protrudes from the inner wall of the valve cavity, a valve seat fixing groove is formed on the valve seat fixing part, a valve seat ring is detachably arranged in the valve seat fixing groove, a sealing member is arranged between the valve seat ring and the inner wall of the valve seat fixing groove, and the gate plate presses the valve seat ring against the valve seat sealing member.

[0006] Preferably, the valve seat fixing groove is arranged in a ring groove structure, the cross-sectional shape of the valve seat fixing groove is arranged in a "convex" character structure. The valve seat ring has a body part, a gate plate sealing and positioning part and a seat body sealing and positioning part. The gate plate sealing and positioning part and the seat body sealing and positioning part respectively protrude from the center of the body part towards the gate plate and the valve seat fixing groove. The sealing member is arranged between the seat body sealing and positioning part and the inner wall of the valve seat fixing groove. A positioning concave part corresponding to the seat body sealing and positioning part is concavely formed on the sealing member, and the seat body sealing and positioning part extends into the positioning concave part and is in sealing connection with the sealing member.

[0007] Preferably, a gate plate annular concave part is concavely formed on the gate plate corresponding to the gate plate sealing and positioning part, a rubber pad is arranged on the gate plate annular concave part, and the gate plate sealing and positioning part presses the rubber pad.

[0008] Preferably, an interference fit is provided between the valve seat ring and the valve seat fixing groove. The outer ring side of the valve seat ring is inclined, the inclination angle of the outer ring side of the valve seat ring is 5-8°, and the maximum outer diameter of the valve seat ring is greater than the maximum inner diameter of the valve seat fixing groove.

[0009] Preferably, a middle barrel is arranged between the valve cover and the valve body, set screws are arranged between the middle barrel and both the valve cover and the valve body, and the middle barrel is connected to the valve cover and the valve body through the set screws.

[0010] Preferably, an upper sealing element is provided between the middle barrel and the valve cover, and a lower sealing element is provided between the middle barrel and the valve body. The upper and lower sealing elements are symmetrical and identical in structure.

[0011] Preferably, both the upper and lower seals of the middle drum are made of rubber.

[0012] The beneficial effects of this invention are as follows: by setting a detachable valve seat ring and using it in conjunction with a sealing element, the sealing performance of the valve can be effectively improved, preventing media leakage. At the same time, the detachable design of the valve seat ring facilitates its replacement and maintenance, reducing maintenance costs. The valve seat fixing groove on the valve seat fixing part improves the stability and reliability of the valve seat ring installation, ensuring that the valve seat ring will not shift or loosen due to uneven force during use. 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 novel bellows gate valve, including a valve body 1, a valve cover 2, and a gate 3. The valve cover 2 is disposed on the valve body 1, forming a valve cavity 4 between the valve cover 2 and the valve body 1. The gate 3 is disposed within the valve cavity 4. A valve stem 5 is disposed on the valve body 1, with one end of the valve stem 5 extending into the valve cavity 4 and connecting to the gate 3. A valve seat fixing part 6 protrudes from the inner wall of the valve cavity 4, and a valve seat fixing groove 7 is formed on the valve seat fixing part 6. A valve seat ring 8 is detachably disposed within the valve seat fixing groove 7. A sealing element 9 is disposed between the valve seat ring 8 and the inner wall of the valve seat fixing groove 7. The gate 3 presses the valve seat ring 8 tightly onto the valve seat sealing element 9. Specifically, in this design, by setting a detachable valve seat ring 8 and using it in conjunction with the sealing element 9, the sealing performance of the valve can be effectively improved, preventing media leakage. At the same time, the detachable design of the valve seat ring 8 also facilitates its replacement and maintenance, reducing maintenance costs. A valve seat fixing groove 7 is provided on the valve seat fixing part 6, which can improve the stability and reliability of the valve seat ring 8 installation and ensure that the valve seat ring 8 will not shift or loosen due to uneven force during use.

[0020] Furthermore, the valve seat fixing groove 7 is configured as an annular groove, and its cross-sectional shape is a "convex" shape. The valve seat ring 8 has a body portion 10, a gate sealing positioning portion 11, and a seat sealing positioning portion 12. The gate sealing positioning portion 11 and the seat sealing positioning portion 12 are respectively formed by protruding from the center of the body portion 10 towards the gate 3 and the valve seat fixing groove 7. The sealing element 9 is disposed between the seat sealing positioning portion 12 and the inner wall of the valve seat fixing groove 7. The sealing element 9 has an inwardly recessed positioning recess 13 corresponding to the seat sealing positioning portion 12, and the seat sealing positioning portion 12 extends into the positioning recess 13 to seal and connect with the sealing element 9. Specifically, in this embodiment, the "convex" structure design of the valve seat fixing groove 7 not only enhances the connection strength between the valve seat ring 8 and the valve seat fixing groove 7, but also ensures that the sealing element 9 can be stably installed between the two, further improving the sealing effect of the valve. Furthermore, the gate sealing positioning part 11 and the seat sealing positioning part 12 ensure that the gate 3 can accurately press the valve seat ring 8 when closed, preventing the medium from leaking through the gap between the gate 3 and the valve seat ring 8. Simultaneously, the seat sealing positioning part 12 extends into the positioning recess 13 and seals with the sealing element 9. This design not only increases the sealing area but also improves the tightness of the seal, ensuring that the valve maintains good sealing performance under various operating conditions.

[0021] Furthermore, a gate annular recess 14 is formed on the gate 3 corresponding to the gate sealing positioning part 11, and a rubber gasket 15 is provided on the gate annular recess 14. The gate sealing positioning part 11 presses the rubber gasket 15 tightly. Specifically, in this embodiment, the gate annular recess 14 provides a stable installation position for the rubber gasket 15. The rubber gasket 15 has good elasticity and sealing performance. When the gate 3 is closed, the gate sealing positioning part 11 can tightly press the rubber gasket 15, thereby further enhancing the sealing effect of the valve. This design not only improves the sealing performance of the valve but also extends the service life of the valve and reduces the maintenance and replacement costs caused by media leakage. At the same time, the easy replacement of the rubber gasket 15 also makes valve maintenance simpler and faster, improving the reliability and stability of the valve.

[0022] Furthermore, the valve seat ring 8 and the valve seat fixing groove 7 are interference-fitted. The outer ring side of the valve seat ring 8 is inclined at an angle of 5-8°, and the maximum outer diameter of the valve seat ring 8 is larger than the maximum inner diameter of the valve seat fixing groove 7. Specifically, in this embodiment, the interference fit design between the valve seat ring 8 and the valve seat fixing groove 7 ensures the stability and firmness of the valve seat ring 8 within the valve seat fixing groove 7. This fit effectively prevents the valve seat ring 8 from loosening or shifting due to force during use, thereby ensuring the sealing performance and normal operation of the valve. Simultaneously, the inclined outer ring side of the valve seat ring 8 at an angle of 5-8° not only facilitates the installation and disassembly of the valve seat ring 8 but also increases the contact area between the valve seat ring 8 and the valve seat fixing groove 7 to a certain extent, improving the tightness and stability of the connection. In addition, the maximum outer diameter of the valve seat ring 8 is larger than the maximum inner diameter of the valve seat fixing groove 7. This size design ensures that the valve seat ring 8 can fit tightly in the valve seat fixing groove 7 after installation, further enhancing the sealing effect of the valve.

[0023] Furthermore, a middle barrel 16 is provided between the valve cover 2 and the valve body 1. Set screws 17 are provided between the middle barrel 16 and both the valve cover 2 and the valve body 1. The middle barrel 16 connects the valve cover 2 and the valve body 1 via the set screws 17. Specifically, in this embodiment, the middle barrel 16 strengthens the connection between the valve cover 2 and the valve body 1, improving the overall structural strength of the valve. The use of set screws 17 ensures a tight connection between the middle barrel 16 and the valve cover 2 and valve body 1, preventing media leakage from the connection point. This design not only enhances the valve's sealing performance but also improves its pressure-bearing capacity, enabling it to maintain a stable working state under high-pressure conditions. Simultaneously, the ease of operation of the set screws 17 makes valve installation and maintenance simpler and faster, improving work efficiency.

[0024] Furthermore, an upper sealing element 18 is provided between the middle barrel 16 and the valve cover 2, and a lower sealing element 19 is provided between the middle barrel 16 and the valve body 1. The upper sealing element 18 and the lower sealing element 19 are symmetrically identical. Specifically, in this embodiment, the symmetrical identical structure design of the upper sealing element 18 and the lower sealing element 19 not only simplifies the valve structure but also improves the uniformity and reliability of the seal. This design ensures consistent sealing between the middle barrel 16, the valve cover 2, and the valve body 1, avoiding media leakage problems caused by uneven sealing. At the same time, the symmetrical sealing element 9 structure also makes the valve installation and maintenance easier, reducing operating difficulty and maintenance costs. Furthermore, both the upper sealing element 18 and the lower sealing element 19 are sealing gaskets made of rubber material, as is common in the prior art.

[0025] 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 novel bellows gate valve, comprising a valve body, a valve cover, and a gate, wherein the valve cover is disposed on the valve body, forming a valve cavity between the valve cover and the valve body, the gate is disposed within the valve cavity, and a valve stem is disposed on the valve body, one end of the valve stem extending into the valve cavity and connecting to the gate, characterized in that: On the inner wall of the valve cavity, a valve seat fixing part protrudes. A valve seat fixing groove is formed on the valve seat fixing part. A valve seat ring is detachably arranged in the valve seat fixing groove. A sealing member is arranged between the valve seat ring and the inner wall of the valve seat fixing groove. The gate plate presses the valve seat ring against the valve seat sealing member.

2. The novel bellows gate valve according to claim 1, characterized in that: The valve seat fixing groove is arranged in an annular groove structure. The cross-sectional shape of the valve seat fixing groove is arranged in a "convex" character structure. The valve seat ring has a body part, a gate plate sealing and positioning part, and a seat body sealing and positioning part. The gate plate sealing and positioning part and the seat body sealing and positioning part respectively protrude from the center of the body part towards the gate plate and the valve seat fixing groove. The sealing member is arranged between the seat body sealing and positioning part and the inner wall of the valve seat fixing groove. A positioning concave part corresponding to the seat body sealing and positioning part is recessed on the sealing member. The seat body sealing and positioning part extends into the positioning concave part to be in sealing connection with the sealing member.

3. The novel bellows gate valve according to claim 2, characterized in that: On the gate plate, a gate plate annular concave part is recessed corresponding to the gate plate sealing and positioning part. A rubber pad is arranged on the gate plate annular concave part. The gate plate sealing and positioning part presses the rubber pad.

4. The novel bellows gate valve according to claim 1, characterized in that: There is an interference fit between the valve seat ring and the valve seat fixing groove. The outer ring side of the valve seat ring is inclined. The inclination angle of the outer ring side of the valve seat ring is 5 - 8°. The maximum outer diameter of the valve seat ring is greater than the maximum inner diameter of the valve seat fixing groove.

5. The novel bellows gate valve according to claim 1, characterized in that: A middle barrel is arranged between the valve cover and the valve body. Sets of set screws are arranged between the middle barrel and the valve cover and the valve body respectively. The middle barrel is connected to the valve cover and the valve body through the set screws.

6. The novel bellows gate valve according to claim 5, characterized in that: A middle barrel upper sealing member is arranged between the middle barrel and the valve cover. A middle barrel lower sealing member is arranged between the middle barrel and the valve body. The middle barrel upper sealing member and the middle barrel lower sealing member are arranged in symmetrically identical structures.

7. The novel bellows gate valve according to claim 6, characterized in that: Both the middle barrel upper sealing member and the middle barrel lower sealing member are made of rubber.

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