A new type of sealed butterfly valve

Abstract

The utility model provides a new type sealed butterfly valve, including valve body, valve rod, valve seat and dish plate, and the dish plate is provided with dish plate sealing structure between the flow channel, and the dish plate sealing structure includes soft sealing component and hard seal, and the soft sealing component includes first sealing piece and second sealing piece, and first sealing piece and second sealing piece are arranged on valve seat and dish plate respectively, and first sealing piece and second sealing piece cooperate and seal under the condition of flow channel closing, the utility model discloses through setting up soft sealing component and hard seal, realized the effect of multiple sealing, greatly improved the sealing performance and service life of butterfly valve, under the condition of flow channel closing, first sealing piece and second sealing piece cooperate and form soft sealing, effectively prevent medium leakage and exclude small particle impurities simultaneously, and then, the setting of hard seal further strengthens the sealing effect, even in the medium environment containing small particle impurities, can effectively prevent the hard sealing surface from being washed and scraped, avoids the problem of sealing and leakage.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a novel sealing butterfly valve. Background Technology

[0002] Valves play a crucial role in industrial piping systems, controlling fluid flow and ensuring system operation. However, most existing butterfly valves employ a single-seal structure, relying primarily on a hard metal-to-metal seal. But with this single-seal design, especially in environments containing small particulate matter, the hard seal surface is easily eroded and scratched by these particles during long-term use. Over time, this leads to wear and indentations, resulting in poor sealing, leakage, and ultimately affecting the valve's lifespan and sealing performance. Summary of the Invention

[0003] In view of this, the present invention provides a novel ironing machine.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel sealing butterfly valve includes a valve body, a valve stem, a valve seat, and a disc. A flow channel is formed within the valve body, and the disc is disposed within the flow channel, connecting to the inner wall of the flow channel. One end of the valve stem extends into the valve body and connects to the disc. The valve seat is disposed on the valve body, and one end of the valve seat extends into the flow channel and connects to the valve body. A disc sealing structure is provided between the valve seat and the inner wall of the flow channel. The disc sealing structure includes a soft sealing component and a hard sealing element. The soft sealing component includes a first sealing element and a second sealing element, which are respectively disposed on the valve seat and the disc. The valve seat presses the hard sealing element against the inner wall of the valve body. Both the first sealing element and the hard sealing element are in sealing contact with the disc.

[0005] Preferably, the first sealing element is disposed on the side of the valve seat near the disc plate. The first sealing element includes a sealing part, a connecting part, and a limiting part. The connecting part is disposed between the sealing part and the limiting part. The valve seat has a limiting groove at the position of the first sealing element. The limiting part and the connecting part are both disposed in the limiting groove. One end of the sealing part extends out of the limiting groove and connects to the disc plate.

[0006] Preferably, the second seal is disposed on the side wall of the disc plate near the valve body. A soft sealing groove is provided on the disc plate corresponding to the position of the second seal. The second seal is disposed in the soft sealing groove and is exposed outward. The second seal cooperates with the first seal and the hard seal to perform sealing.

[0007] Preferably, a hard sealing groove is provided between the valve body and the valve seat, one end of the hard sealing element is disposed in the hard sealing groove, the other end of the hard sealing element extends out of the sealing groove and connects with the disc plate, a sealing slope is provided on the side of the hard sealing element that connects with the disc plate, and a disc plate slope is provided on the disc plate at the position corresponding to the sealing slope.

[0008] Preferably, the valve seat is detachably mounted on the valve body.

[0009] Preferably, a packing cavity is provided between the hard seal and the valve body, and packing is provided in the packing cavity.

[0010] Preferably, a gap is provided between the hard seal and the bottom wall of the hard seal groove.

[0011] Preferably, the hard seal has a QPQ hardened layer.

[0012] The beneficial effects of this utility model are as follows: This design achieves a multi-seal effect by setting up soft sealing components and hard sealing elements, greatly improving the sealing performance and service life of the butterfly valve. When the flow channel is closed, the first and second sealing elements cooperate to form a soft seal, effectively preventing media leakage while removing small particulate impurities. Subsequently, the hard sealing element further enhances the sealing effect, effectively preventing erosion and scratching of the hard sealing surface even in media environments containing small particulate impurities, avoiding problems such as incomplete sealing and leakage. Furthermore, the valve seat is detachably mounted on the valve body, facilitating cleaning and maintenance of the valve seat and disc sealing structure, reducing maintenance costs. The gap between the hard sealing element and the bottom wall of the hard sealing groove allows the hard sealing element to undergo a certain degree of elastic deformation under stress, further improving the sealing effect. 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 structural schematic diagram of the present invention; Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle.

[0015] Figure label: 1. Valve body; 2. Valve stem; 3. Valve seat; 4. Disc; 5. Flow channel; 6. Disc sealing structure; 7. Soft sealing assembly; 8. Hard sealing element; 9. First sealing element; 10. Second sealing element; 11. Sealing part; 12. Connecting part; 13. Limiting part; 14. Limiting groove; 15. Soft sealing groove; 16. Hard sealing groove; 17. Sealing bevel; 18. Disc bevel; 19. Packing cavity; 20. Packing. 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: As attached Figure 1-2 As shown, this utility model discloses a novel sealing butterfly valve. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this 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 1-2As shown, this utility model discloses a novel sealing butterfly valve, including a valve body 1, a valve stem 2, a valve seat 3, and a disc 4. A flow channel 5 is formed within the valve body 1, and the disc 4 is disposed within the flow channel 5, connecting to the inner wall of the flow channel 5. One end of the valve stem 2 extends into the valve body 1 and connects to the disc 4. The valve seat 3 is disposed on the valve body 1, and one end of the valve seat 3 extends into the flow channel 5 and connects to the valve body 1. A disc sealing structure 6 is provided between the valve seat 3 and the inner wall of the flow channel 5. The disc sealing structure 6 includes a soft sealing component 7 and a hard sealing component 8. The soft sealing component 7 includes a first sealing component 9 and a second sealing component 10, which are respectively disposed on the valve seat 3 and the disc 4. The first sealing component 9 and the second sealing component 10 cooperate to seal the flow channel 5 when it is closed. In this embodiment, the function of the disc sealing structure 6 is to enhance the sealing performance of the valve, ensuring reliable sealing between the disc 4 and the valve seat 3 under fluid pressure. The combined use of the first sealing element 9 and the second sealing element 10 forms a multi-layer sealing mechanism, effectively preventing fluid leakage and preventing particulate impurities from entering the hard seal 8 and causing wear. Simultaneously, the hard seal 8 further improves the reliability and durability of the seal, enabling this novel sealing butterfly valve to maintain a good sealing effect. Furthermore, the hard seal 8 has a QPQ hardened layer, which improves its hardness and wear resistance, extending the valve's service life. When the disc 4 is closed, the first sealing element 9 first intersects with the hard seal 8, and then the second sealing element 10 connects with the hard seal 8 to form a sealed connection. The hard seal 8 intersects with the butterfly plate hard seal, forming a multi-disc sealing structure 6 when closed. In this embodiment, the valve stem 2 drives the disc 4 to rotate, thereby controlling the opening and closing of the flow channel 5.

[0021] Furthermore, the first sealing element 9 is disposed on the side of the valve seat 3 near the disc 4. The first sealing element 9 includes a sealing part 11, a connecting part 12, and a limiting part 13. The connecting part 12 is disposed between the sealing part 11 and the limiting part 13. The valve seat 3 has a limiting groove 14 at the position corresponding to the first sealing element 9. Both the limiting part 13 and the connecting part 12 are disposed within the limiting groove 14. One end of the sealing part 11 extends out of the limiting groove 14 and connects with the disc 4. In this embodiment, the function of the first sealing element 9 is to provide initial sealing contact between the disc 4 and the valve seat 3 and to ensure stable installation of the sealing element on the valve seat 3. The sealing part 11 extends out of the limiting groove 14 and connects with the disc 4 to form a sealing interface, effectively preventing fluid leakage through gaps. The connecting part 12 acts as a bridge between the sealing part 11 and the limiting part 13, ensuring the overall strength and stability of the sealing element. The limiting part 13 is set in the limiting groove 14, which restricts the movement range of the sealing element and prevents it from being displaced under fluid pressure, thereby ensuring the stability and reliability of the sealing effect.

[0022] Furthermore, the second seal 10 is disposed on the side wall of the disc 4 near the valve body 1. A soft sealing groove 15 is provided on the disc 4 corresponding to the position of the second seal 10. The second seal 10 is disposed within the soft sealing groove 15 and exposed outwards. The second seal 10 cooperates with the first seal 9 and the hard seal 8 to provide a seal. The function of the second seal 10 is to further enhance the sealing effect, especially in the small gap between the disc 4 and the valve seat 3. When the disc 4 is closed, the second seal 10 and the hard seal 8 fit tightly together, forming a continuous sealing line, effectively preventing fluid penetration. Simultaneously, the outward-exposed design of the second seal 10 increases its direct contact area with the fluid, further improving the tightness and stability of the seal. In addition, the placement of the second seal 10 within the soft sealing groove 15 ensures its secure installation and facilitates later maintenance and replacement, improving the overall performance and lifespan of the valve.

[0023] Furthermore, a hard sealing groove 16 is provided between the valve body 1 and the valve seat 3. One end of the hard sealing element 8 is disposed within the hard sealing groove 16, and the other end of the hard sealing element 8 extends out of the sealing groove and connects to the disc 4. A sealing slope 17 is provided on the side of the hard sealing element 8 that connects to the disc 4, and a disc slope 18 is provided on the disc 4 corresponding to the sealing slope 17. In this embodiment, the function of the hard sealing groove 16 is to provide a stable installation position for the hard sealing element 8 and ensure a sealing contact between it and the disc 4. One end of the hard sealing element 8 is disposed within the hard sealing groove 16, restricting its radial movement and ensuring the stability and reliability of the seal. The other end extends out of the sealing groove and connects to the disc 4. Through the cooperation of the sealing slope 17 and the disc slope 18, a tight sealing interface is formed, effectively preventing fluid leakage. This design not only improves the sealing effect but also enhances the pressure resistance of the valve, enabling it to maintain a good sealing state under high pressure. Meanwhile, the installation and removal of the hard seal 8 are more convenient, facilitating later maintenance and repair, and improving the overall performance and lifespan of the valve.

[0024] Furthermore, the valve seat 3 is detachably mounted on the valve body 1. In this embodiment, the detachable design of the valve seat 3 makes valve maintenance and repair more convenient. When the valve needs repair or replacement of seals, simply remove the valve seat 3 from the valve body 1 to easily access the disc 4 and disc sealing structure 6, greatly reducing maintenance difficulty and time costs. Simultaneously, this design facilitates cleaning and inspection of the valve's interior, ensuring long-term stable operation. The separable design of the valve seat 3 also ensures that when valve components deform, only the deformed components need to be replaced, without replacing the entire valve seat 3. In addition, the detachability of the valve seat 3 improves the valve's flexibility and applicability, enabling it to adapt to different working conditions and needs, further expanding the valve's application range.

[0025] Furthermore, a packing cavity 19 is provided between the hard seal 8 and the valve body 1, and packing 20 is disposed in the packing cavity 19. In this embodiment, the design of the packing cavity 19 is mainly to enhance the sealing performance between the hard seal 8 and the valve body 1, and to prevent fluid leakage from the gap between the two.

[0026] Furthermore, a gap is provided between the hard seal 8 and the bottom wall of the hard seal groove 16. In this embodiment, the gap is mainly provided to give the hard seal 8 more room to move when it intersects with the disc 4, which helps to reduce the driving torque when driving the disc 4.

[0027] Furthermore, the hard seal 8 has a QPQ hardened layer. In this embodiment, the QPQ hardened layer of the hard seal 8 is formed through QPQ salt bath composite treatment technology. This technology combines nitriding, high-frequency quenching, and surface oxidation into one process, which can significantly improve the surface hardness, wear resistance, and corrosion resistance of the hard seal 8. The presence of the QPQ hardened layer allows the hard seal 8 to maintain its original shape and size even under prolonged fluid scouring and friction, making it less prone to wear and deformation, thereby ensuring the long-term sealing performance of the valve. In addition, the QPQ hardened layer can also effectively resist the erosion of the hard seal 8 by chemicals in the fluid, extending the service life of the valve. This specially treated hard seal 8 makes the application of this new type of sealing butterfly valve more reliable under harsh working conditions, improving the stability and safety of the entire valve system.

[0028] 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 sealing butterfly valve, comprising a valve body, a valve stem, a valve seat, and a disc, wherein a flow channel is formed within the valve body, the disc is disposed within the flow channel and is in contact with the inner wall of the flow channel, and one end of the valve stem extends into the valve body and connects with the disc, characterized in that: The valve seat is mounted on the valve body, with one end extending into the flow channel and connecting to the valve body. A disc sealing structure is provided between the valve seat and the inner wall of the flow channel. The disc sealing structure includes a soft sealing component and a hard sealing component. The soft sealing component includes a first sealing component and a second sealing component. The first sealing component and the second sealing component are respectively mounted on the valve seat and the disc. The valve seat presses the hard sealing component against the inner wall of the valve body. Both the first sealing component and the hard sealing component are in sealing contact with the disc.

2. The novel sealing butterfly valve according to claim 1, characterized in that: The first sealing element is disposed on the side of the valve seat near the disc. The first sealing element includes a sealing part, a connecting part, and a limiting part. The connecting part is disposed between the sealing part and the limiting part. The valve seat has a limiting groove corresponding to the position of the first sealing element. The limiting part and the connecting part are both disposed in the limiting groove. One end of the sealing part extends out of the limiting groove and connects to the disc.

3. The novel sealing butterfly valve according to claim 1, characterized in that: The second seal is disposed on the side wall of the disc plate near the valve body. A soft sealing groove is provided on the disc plate at the position corresponding to the second seal. The second seal is disposed in the soft sealing groove and is exposed outward. The second seal cooperates with the first seal and the hard seal to perform sealing.

4. A novel sealing butterfly valve according to claim 1, characterized in that: A hard sealing groove is also provided between the valve body and the valve seat. One end of the hard sealing element is set in the hard sealing groove, and the other end of the hard sealing element extends out of the sealing groove and connects with the disc plate. A sealing slope is provided on the side of the hard sealing element that connects with the disc plate, and a disc plate slope is provided at the position of the sealing slope on the disc plate.

5. A novel sealing butterfly valve according to claim 1, characterized in that: The valve seat is detachably mounted on the valve body.

6. A novel sealing butterfly valve according to claim 1, characterized in that: A packing cavity is also provided between the hard seal and the valve body, and packing is provided in the packing cavity.

7. A novel sealing butterfly valve according to claim 4, characterized in that: A gap is provided between the hard seal and the bottom wall of the hard seal groove.

8. A novel sealing butterfly valve according to claim 7, characterized in that: The hard seal has a QPQ hardened layer.

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