A high sealing corrugated pipe gate valve

Abstract

A kind of high sealing corrugated pipe gate valve, it includes valve body, the valve rod capable of being arranged inside valve body moves up and down, the lower end of valve rod is fixedly connected with valve plate, the upper direction of valve body is sequentially provided with middle barrel and valve cover, one end of valve rod passes through middle barrel and valve cover and is connected with valve plate into valve body, the outside of valve rod is also provided with corrugated pipe, the upper end of corrugated pipe is provided with corrugated seat, corrugated pipe is fixedly connected with corrugated seat, the lower end of corrugated pipe is fixedly connected with the lower part of valve rod, corrugated seat is arranged between middle barrel and valve cover, sealing connection structure is arranged between middle barrel and valve body, sealing connection structure enters valve body and seals between valve body and middle barrel.The design is sealed by setting sealing connection structure, improves the sealing performance of gate valve, ensures that medium does not leak when gate valve is closed, improves the use effect and safety of gate valve, to avoid the corrosion of medium to valve rod and related equipment, also protects the environment around gate valve.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a high-sealing bellows gate valve. Background Technology

[0002] Traditional gate valves typically consist of a valve body, gate, cover, and stem. Gate valves generally achieve the function of cutting off the flow of media by moving the gate within the valve body, and are commonly used for switching on and off when transporting media. However, in existing gate valves, during the up-and-down movement of the stem, the media can leak out of the valve along the channels and gaps due to the force of the rising gate. This can easily corrode the valve stem and related equipment, and also pollute the environment around the gate valve. Summary of the Invention

[0003] In view of this, the present invention provides a high-sealing bellows gate valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A high-sealing bellows gate valve includes a valve body with a valve stem capable of vertical movement inside the valve body. A valve plate is fixedly connected to the lower end of the valve stem. A middle barrel and a valve cover are sequentially arranged on the upper part of the valve body. One end of the valve stem passes through the middle barrel and the valve cover, extends into the valve body, and connects to the valve plate. A bellows is also provided on the outer side of the valve stem. A bellows seat is provided at the upper end of the bellows, and the bellows is fixedly connected to the bellows seat. The lower end of the bellows is fixedly connected to the lower part of the valve stem. The bellows seat is located between the middle barrel and the valve cover. A sealing connection structure is provided between the middle barrel and the valve body. The sealing connection structure includes a connecting part on the valve body, a limiting groove on the middle barrel, and a sealing ring between the valve body and the middle barrel. A sealing groove is provided on the side wall of the limiting groove at a position corresponding to a sealing block. The sealing groove cooperates with the sealing block to seal the connection between the middle barrel and the valve body. The sealing ring is located on the side of the connecting part and the limiting groove away from the valve stem, and the sealing ring provides a secondary seal for the connection between the valve body and the middle barrel.

[0005] Preferably, the connecting part protrudes from the end face of the valve body near the middle barrel, the connecting part is arranged in a ring structure with the valve stem central axis as the center, the connecting part extends upward along the valve body near the valve stem, and a plurality of sealing blocks are provided on the outer wall of the connecting part, the sealing blocks being connected to the sealing groove.

[0006] Preferably, the limiting groove is located on the side of the middle barrel near the valve stem. The limiting groove is arranged in a ring structure with the opening of the limiting groove facing the valve stem. A sealing groove is provided on the groove wall of the limiting groove corresponding to the position of the sealing block. The sealing groove is adapted to the sealing block. When the connecting part extends into the limiting groove, the sealing block can be inserted into the sealing groove to achieve a preliminary seal between the middle barrel and the valve body.

[0007] Preferably, the sealing ring includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are arranged symmetrically, and both the first inclined surface and the second inclined surface are arranged on the side of the sealing ring near the valve stem.

[0008] Preferably, a first sealing groove is formed on the valve body at the position corresponding to the sealing ring, and an inclined groove wall corresponding to the first inclined surface is provided in the first sealing groove. A second sealing groove is formed on the middle barrel at the position corresponding to the sealing ring, and an inclined groove wall corresponding to the second inclined surface is provided in the second sealing groove. The two sides of the sealing ring extend into the first sealing groove and the second sealing groove respectively for connection.

[0009] Preferably, a handwheel is provided at the end of the valve stem away from the valve plate, and the handwheel is located above the valve cover, and the handwheel drives the valve stem to move up and down.

[0010] Preferably, the valve body is arranged in an inverted T-shape, with an inlet and an outlet on each side of the valve body, and a connecting transmission channel between the inlet and outlet. The upper end of the valve body is provided with an opening and closing hole, and a partition channel is provided between the opening and closing hole and the transmission channel. The partition channel is perpendicular to the transmission channel, and the valve stem and valve plate move up and down within the partition channel.

[0011] Preferably, a partition groove is provided on the side wall of the transmission channel corresponding to the valve plate position, and the valve plate extends into the partition groove to cut off the transmission channel.

[0012] Preferably, the height of the transmission channel is lower than the height of the valve plate, and a partition end protrudes between the transmission channel and the partition channel. The partition end is connected to the valve plate to cut off the transmission channel and the partition channel.

[0013] Preferably, the valve body is provided with a connection hole, and the middle barrel is provided with a fixing hole at the position corresponding to the connection hole. The valve body is also provided with a bolt and a nut, one end of the bolt passes through the connection hole and the fixing hole, and the nut fixes the two ends of the bolt.

[0014] The beneficial effects of this utility model are as follows: This design improves the sealing performance of the gate valve by setting a sealing connection structure, ensuring that the medium will not leak when the gate valve is closed, thus improving the use effect and safety of the gate valve. It effectively prevents the medium from leaking to the outside of the gate valve along the channel and gap due to the impact force when the valve plate rises, thereby avoiding the corrosion of the valve stem and related equipment by the medium, and also protecting the environment around the gate valve. Attached Figure Description

[0015] 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.

[0016] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is an enlarged view of point A in this utility model.

[0017] Figure label: 1. Valve body; 2. Valve stem; 3. Valve plate; 4. Middle barrel; 5. Valve cover; 6. Bellows; 7. Bellows seat; 8. Sealing connection structure; 9. Connecting part; 10. Limiting groove; 11. Sealing ring; 12. Sealing block; 13. Sealing groove; 14. First sealing groove; 15. Second sealing groove; 16. Connecting hole; 17. Fixing hole; 18. Bolt; 19. Nut; 20. Handwheel; 21. Inlet; 22. Outlet; 23. Transmission channel; 24. Opening and closing hole; 25. Isolation channel; 26. Isolation groove; 27. Isolation end; 28. First inclined surface; 29. ​​Second inclined surface. 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] The present invention will now be further described with reference to the accompanying drawings.

[0020] This utility model provides the following technical solution: As attached Figure 1-2 As shown in the accompanying drawings, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] The present invention will now be further described with reference to the accompanying drawings.

[0022] This utility model provides the following technical solution: As attached Figure 1-2 As shown, this utility model discloses a high-sealing bellows gate valve, including a valve body 1. A valve stem 2 capable of vertical movement is disposed within the valve body 1. A valve plate 3 is fixedly connected to the lower end of the valve stem 2. A middle barrel 4 and a valve cover 5 are sequentially arranged on the upper part of the valve body 1. One end of the valve stem 2 passes through the middle barrel 4 and the valve cover 5, extending into the valve body 1 and connecting to the valve plate 3. A bellows 6 is also disposed on the outer side of the valve stem 2. A bellows seat 7 is disposed at the upper end of the bellows 6, and the bellows 6 and the bellows seat 7 are fixedly connected. The lower end of the bellows 6 is fixedly connected to the lower part of the valve stem 2. The bellows seat 7 is disposed on the middle barrel 4 and the valve plate 3. A sealing connection structure 8 is provided between the valve cover 5 and between the middle barrel 4 and the valve body 1. The sealing connection structure 8 includes a connecting part 9 on the valve body 1, a limiting groove 10 on the middle barrel 4, and a sealing ring 11 between the valve body 1 and the middle barrel 4. A sealing groove 13 is provided on the side wall of the limiting groove 10 at a position corresponding to the sealing block 12. The sealing groove 13 cooperates with the sealing block 12 to seal between the middle barrel 4 and the valve body 1. The sealing ring 11 is located on the side of the connecting part 9 and the limiting groove 10 away from the valve stem 2, providing a secondary seal for the connection between the valve body 1 and the middle barrel 4. In this embodiment, the function of the sealing connection structure 8 is to enhance the sealing performance between the valve body 1 and the middle barrel 4, preventing media leakage. Through the carefully designed sealing connection structure 8, the high-pressure medium inside the valve body 1 can be effectively isolated, ensuring the stability and safety of the valve during operation. This sealing connection structure 8 not only improves the sealing performance of the valve but also enhances its durability and reliability, enabling it to maintain good working condition under various harsh operating conditions. In this embodiment, the interlocking design between the limiting groove 10 and the connecting part 9 makes the connection between the valve body 1 and the middle barrel 4 more stable. The cooperation between the sealing block 12 on the limiting groove 10 and the sealing groove 13 further ensures sealing performance, effectively preventing media leakage from the connection gap. Simultaneously, the addition of the sealing ring 11 provides extra safety for the valve, ensuring that the valve's sealing performance remains unaffected even under extreme operating conditions. This multi-seal design not only improves the valve's sealing efficiency but also significantly extends its service life and reduces maintenance costs.

[0023] Furthermore, the connecting portion 9 protrudes from the end face of the valve body 1 near the middle barrel 4. The connecting portion 9 is arranged in a ring structure with the central axis of the valve stem 2 as the center. The connecting portion 9 extends upward along the direction of the valve body 1 near the valve stem 2. Several sealing blocks 12 protrude from the outer wall of the connecting portion 9, and the sealing blocks 12 are connected to the sealing grooves 13. In this embodiment, the function of the connecting portion 9 is to initially connect the valve body 1 and the middle barrel 4 and to provide an installation position for the sealing blocks 12. The ring structure design of the connecting portion 9 corresponds to the center of the valve stem 2, ensuring a uniform and stable connection between the valve body 1 and the middle barrel 4. Simultaneously, the upward extension of the connecting portion 9 along the direction of the valve body 1 near the valve stem 2 not only enhances the stability of the connection but also provides sufficient space for the sealing blocks 12 and the sealing grooves 13 to cooperate, thereby further improving the sealing performance. The sealing block 12 makes the connection between the connecting part 9 and the limiting groove 10 tighter. When the connecting part 9 extends into the limiting groove 10, the sealing block 12 can be inserted into the sealing groove 13 to form a preliminary sealing effect, effectively preventing the medium from leaking from the connection gap.

[0024] Furthermore, the limiting groove 10 is formed on the side of the middle barrel 4 near the valve stem 2. The limiting groove 10 has an annular structure, with its opening facing the valve stem 2. A sealing groove 13 is formed on the groove wall of the limiting groove 10 corresponding to the position of the sealing block 12. The sealing groove 13 is adapted to the sealing block 12. When the connecting part 9 extends into the limiting groove 10, the sealing block 12 can be engaged in the sealing groove 13, achieving a preliminary seal between the middle barrel 4 and the valve body 1. In this embodiment, the limiting groove 10 serves to receive and fix the connecting part 9, and cooperates with the sealing block 12 and the sealing groove 13 to further enhance the sealing effect. The annular structure design of the limiting groove 10 matches the annular structure design of the connecting part 9, ensuring that the connection area between the valve body 1 and the middle barrel 4 is maximized, thereby improving the stability and sealing performance of the connection. The opening of the limiting groove 10 faces the valve stem 2. This design facilitates the insertion of the connecting part 9 and the engagement of the sealing block 12 with the sealing groove 13, making the installation and disassembly process simpler and faster. At the same time, the matching design of the sealing groove 13 and the sealing block 12 ensures that the sealing block 12 can be accurately engaged in the sealing groove 13 to form a tight sealing structure, effectively preventing media leakage and improving the valve's performance and safety.

[0025] Furthermore, the sealing ring 11 includes a first inclined surface 28 and a second inclined surface 29, which are symmetrically arranged. Both the first inclined surface 28 and the second inclined surface 29 are located on the side of the sealing ring 11 closest to the valve stem 2. In this embodiment, the design of the first inclined surface 28 and the second inclined surface 29 enables the sealing ring 11 to generate a greater sealing force when subjected to medium pressure, thereby improving the sealing effect. The symmetrical arrangement of the first inclined surface 28 and the second inclined surface 29 not only ensures uniform force distribution on the sealing ring 11 but also makes the installation and disassembly of the sealing ring 11 simpler and faster. When the sealing ring 11 is compressed, the contact area between the first inclined surface 28 and the second inclined surface 29 and the valve body 1 and the middle barrel 4 increases, thereby generating greater friction, which allows the sealing ring 11 to be more firmly fixed between the valve body 1 and the middle barrel 4, further enhancing the sealing performance of the valve.

[0026] Furthermore, a first sealing groove 14 is formed on the valve body 1 at the position corresponding to the sealing ring 11. The first sealing groove 14 contains an inclined groove wall corresponding to the first inclined surface 28. A second sealing groove 15 is formed on the middle barrel 4 at the position corresponding to the sealing ring 11. The second sealing groove 15 contains an inclined groove wall corresponding to the second inclined surface 29. The two sides of the sealing ring 11 extend into the first sealing groove 14 and the second sealing groove 15 respectively for connection. The function of the first sealing groove 14 and the second sealing groove 15 is to position and fix the sealing ring 11, ensuring that the sealing ring 11 can be accurately installed between the valve body 1 and the middle barrel 4. In this embodiment, the design of the first sealing groove 14 and the second sealing groove 15 allows the sealing ring 11 to be more securely connected to the valve body 1 and the middle barrel 4, making it less prone to displacement or detachment. Simultaneously, the portion of the sealing ring 11 extending into the first sealing groove 14 and the second sealing groove 15 can also form an additional sealing layer, further enhancing the valve's sealing performance. This design not only improves the valve's sealing efficiency but also helps extend the service life of the sealing ring 11 and reduces the valve's maintenance costs. In addition, the design of the first sealing groove 14 and the second sealing groove 15 makes the valve assembly process simpler and improves production efficiency.

[0027] Furthermore, the valve body 1 is provided with a connecting hole 16, and the middle barrel 4 is provided with a fixing hole 17 corresponding to the connecting hole 16. The valve body 1 is also provided with a bolt 18 and a nut 19. One end of the bolt 18 passes through the connecting hole 16 and the fixing hole 17, and the nut 19 securely connects the two ends of the bolt 18. In this embodiment, the connection hole 16 and the fixing hole 17 not only facilitate the assembly between the valve body 1 and the middle barrel 4, but also enhance the stability of the connection. The cooperation of the bolt 18 and the nut 19 makes the connection between the valve body 1 and the middle barrel 4 more secure and less prone to loosening. This connection method not only improves the overall stability of the valve, but also helps maintain the valve's sealing performance, ensuring that the valve can work normally under various operating conditions. In addition, this connection method has the advantages of simple structure, easy operation and maintenance, reducing the installation and maintenance costs of the valve. At the same time, the fixing method of the bolt 18 and nut 19, combined with the sealing connection structure 8, can achieve a better sealing effect.

[0028] Furthermore, a handwheel 20 is provided at the end of the valve stem 2 furthest from the valve plate 3. The handwheel 20 is positioned above the valve cover 5, and it drives the valve stem 2 to move up and down. In this embodiment, the design of the handwheel 20 not only facilitates the operator's opening and closing of the valve stem 2 but also improves operational safety. The handwheel 20 allows the operator to easily control the up and down movement of the valve stem 2 by rotating it, thereby opening and closing the valve. Simultaneously, the connection structure between the handwheel 20 and the valve stem 2 is robust and reliable, ensuring operational stability and accuracy. This design not only improves the ease of valve operation but also contributes to enhancing the overall performance and safety of the valve.

[0029] Furthermore, the valve body 1 is configured with an inverted T-shape. An inlet 21 and an outlet 22 are respectively located on both sides of the valve body 1, and a connecting transmission channel 23 is provided between the inlet 21 and the outlet 22. An opening / closing hole 24 is provided at the upper end of the valve body 1, and a partition channel 25 is provided between the opening / closing hole 24 and the transmission channel 23. The partition channel 25 is perpendicular to the transmission channel 23, and the valve stem 2 and valve plate 3 move up and down within the partition channel 25. In this embodiment, the function of the valve body 1 is to control the flow and cut off of the medium. The inverted T-shaped valve body 1 design allows the medium to enter the transmission channel 23 from the inlet 21 and then exit through the outlet 22. The up-and-down movement of the valve stem 2 and valve plate 3 within the partition channel 25 effectively cuts off or opens the transmission channel 23, thereby achieving control of the medium. This design not only improves the control accuracy of the valve but also helps maintain the stability and reliability of the valve. Meanwhile, the isolation channel 25 is set perpendicular to the transmission channel 23, which makes the valve stem 2 and valve plate 3 move more smoothly and cut off more completely, reducing the risk of media leakage caused by improper operation.

[0030] Furthermore, a partition groove 26 is provided on the side wall of the transmission channel 23 corresponding to the position of the valve plate 3. The valve plate 3 extends into the partition groove 26 to cut off the transmission channel 23. In this embodiment, the partition groove 26 enhances the cutting-off effect of the valve plate 3 on the transmission channel 23. When the valve plate 3 moves downward within the partition channel 25, it extends into the partition groove 26. Due to the partition groove 26, the valve plate 3 can fit more tightly against the side wall of the transmission channel 23, thereby effectively cutting off the flow of the medium. This design not only improves the valve's cutting-off performance but also helps reduce the risk of medium leakage, ensuring that the valve maintains a good sealing effect under various operating conditions. At the same time, the partition groove 26 also makes the valve plate 3 move more smoothly during movement, reducing the risk of valve damage due to improper operation.

[0031] Furthermore, the height of the transmission channel 23 is lower than the height of the valve plate 3. An isolation end 27 protrudes between the transmission channel 23 and the isolation channel 25. The isolation end 27 connects to the valve plate 3, effectively cutting off both the transmission channel 23 and the isolation channel 25. In this embodiment, the isolation end 27 further enhances the cutting-off effect of the valve plate 3 on the transmission channel 23. Because the height of the transmission channel 23 is lower than the height of the valve plate 3, and the isolation end 27 protrudes between the transmission channel 23 and the isolation channel 25, when the valve plate 3 moves downwards, the isolation end 27 connects to the valve plate 3, jointly cutting off the transmission channel 23. This ensures that the medium does not flow into the outlet 22 after passing through the isolation channel 25, guaranteeing the cutting-off effect. This design not only improves the valve's cutting-off efficiency but also helps enhance the valve's sealing performance. Simultaneously, the isolation end 27 also makes the valve plate 3 more stable during the cutting-off process, reducing the risk of medium leakage due to improper operation and improving the overall performance and safety of the valve.

[0032] 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 high-sealing bellows gate valve, comprising a valve body, wherein a valve stem capable of vertical movement is disposed within the valve body, a valve plate is fixedly connected to the lower end of the valve stem, a valve cover and a middle barrel are sequentially disposed on the upper side of the valve body, one end of the valve stem passes through the middle barrel and the valve cover and extends into the valve body to connect with the valve plate, a bellows is also disposed outside the valve stem, a bellows seat is disposed at the upper end of the bellows, the bellows and the bellows seat are fixedly connected, the lower end of the bellows is fixedly connected to the lower part of the valve stem, and the bellows seat is disposed between the middle barrel and the valve cover, characterized in that: A sealing connection structure is provided between the middle barrel and the valve body. The sealing connection structure includes a connecting part on the valve body, a limiting groove on the middle barrel, and a sealing ring between the valve body and the middle barrel. A sealing groove is provided on the wall of the limiting groove at the position corresponding to the sealing block. The sealing groove cooperates with the sealing block to seal between the middle barrel and the valve body. The sealing ring is located on the side of the connecting part and the limiting groove away from the valve stem. The sealing ring provides a secondary seal for the connection between the valve body and the middle barrel.

2. The high-sealing bellows gate valve according to claim 1, characterized in that: The connecting part protrudes from the end face of the valve body near the middle barrel. The connecting part is arranged in a ring structure with the valve stem central axis as the center. The connecting part extends upward along the valve body near the valve stem. Several sealing blocks are provided on the outer wall of the connecting part. The sealing blocks are connected to the sealing groove.

3. The high-sealing bellows gate valve according to claim 2, characterized in that: The limiting groove is located on the side of the middle barrel near the valve stem. The limiting groove has an annular structure with its opening facing the valve stem. A sealing groove is provided on the groove wall corresponding to the position of the sealing block. The sealing groove is adapted to the sealing block. When the connecting part extends into the limiting groove, the sealing block can be inserted into the sealing groove to achieve a preliminary seal between the middle barrel and the valve body.

4. The high-sealing bellows gate valve according to claim 1, characterized in that: The sealing ring includes a first inclined surface and a second inclined surface, which are arranged symmetrically. Both the first and second inclined surfaces are located on the side of the sealing ring closest to the valve stem.

5. A high-sealing bellows gate valve according to claim 1, characterized in that: A first sealing groove is formed on the valve body at the position corresponding to the sealing ring, and a second sealing groove is formed on the middle barrel at the position corresponding to the sealing ring. The two sides of the sealing ring extend into the first sealing groove and the second sealing groove respectively for connection.

6. A high-sealing bellows gate valve according to claim 1, characterized in that: A handwheel is provided at the end of the valve stem away from the valve plate. The handwheel is located above the valve cover and drives the valve stem to move up and down.

7. A high-sealing bellows gate valve according to claim 1, characterized in that: The valve body is arranged in an inverted T-shape. An inlet and an outlet are respectively provided on both sides of the valve body. A transmission channel is provided between the inlet and the outlet. An opening and closing hole is provided at the upper end of the valve body. An isolation channel is provided between the opening and closing hole and the transmission channel. The isolation channel is arranged perpendicular to the transmission channel. The valve stem and valve plate move up and down within the isolation channel.

8. A high-sealing bellows gate valve according to claim 7, characterized in that: A partition groove is provided on the side wall of the transmission channel corresponding to the valve plate position, and the valve plate extends into the partition groove to cut off the transmission channel.

9. A high-sealing bellows gate valve according to claim 7, characterized in that: The height of the transmission channel is lower than the height of the valve plate. A partition end protrudes between the transmission channel and the partition channel. The partition end is connected to the valve plate to cut off the transmission channel and the partition channel.

10. A high-sealing bellows gate valve according to claim 1, characterized in that: The valve body is provided with a connection hole, and the middle barrel is provided with a fixing hole at the corresponding position of the connection hole. The valve body is also provided with a bolt and a nut. One end of the bolt passes through the connection hole and the fixing hole, and the nut fixes the two ends of the bolt.

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