A new butterfly valve with sealing structure

Abstract

A new butterfly valve with sealing structure, the valve seat ring is arranged in the flow channel, the annular sealing limiting part is formed on the inner wall of the flow channel, the sealing structure is arranged between the valve seat ring and the annular sealing limiting part, the sealing structure comprises a sealing compression ring connected with the valve seat ring, a hard sealing ring connected with the sealing compression ring, and a soft sealing ring arranged between the sealing compression ring and the hard sealing ring, a fastener is arranged on the valve seat ring, one end of the fastener penetrates through the valve seat ring and abuts against the sealing compression ring. The design significantly improves the sealing performance and service life of the butterfly valve by setting the sealing connection device. Through the sealing structure, combined with the multiple protection of the sealing compression ring, the hard sealing ring and the soft sealing ring, the erosion and scraping of small particles in the medium are effectively resisted, the generation of wear and scratch marks is reduced, thereby ensuring the sealing stability of the valve in the long-term use process. At the same time, the design realizes the stable compression of the sealing structure through the cooperation of the fastener and the valve body, further enhances the reliability of the connection.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a novel butterfly valve with a sealing structure. 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 leaks and reduced sealing performance, impacting valve lifespan and sealing quality. Furthermore, existing sealing structures suffer from unstable connections. Moreover, the hard seals in current technology are often integrally designed, making replacement inefficient and time-consuming when local wear or damage occurs. Summary of the Invention

[0003] In view of this, the present invention provides a novel motor housing pressing magnet clamp.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel butterfly valve with a sealing structure includes a valve body, a valve stem, a valve seat ring, 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 flow channel and connects to the disc. The valve seat ring is disposed within the flow channel, and an annular sealing and limiting portion protrudes from the inner wall of the flow channel. A sealing structure is provided between the valve seat ring and the annular sealing and limiting portion. The sealing structure includes a sealing pressure ring connected to the valve seat ring, a hard sealing ring connected to the sealing pressure ring, and a soft sealing ring disposed between the sealing pressure ring and the hard sealing ring. A fastener is provided on the valve seat ring, one end of which passes through the valve seat ring and abuts against the sealing pressure ring. One end of the valve seat ring connects to the valve body. The valve seat ring, in conjunction with the valve body, presses the sealing pressure ring and the hard sealing ring together. The disc, in conjunction with the hard sealing ring and the soft sealing ring, seals the flow channel when it is closed.

[0005] Preferably, the sealing ring has fasteners and hard sealing rings tightly attached to both sides, and the sealing ring, together with the valve seat ring, presses and fixes the hard sealing ring.

[0006] Preferably, the hard sealing ring is provided with a hard sealing surface, which is located on the side near the disc plate and is arranged with an inclined structure.

[0007] Preferably, the soft sealing ring includes a sealing ring body, the sealing ring body having a sealing part and a plurality of limiting parts, the limiting parts protruding toward the hard sealing ring and the sealing pressure ring respectively, the sealing part protruding toward the disc plate, the hard sealing ring and the sealing pressure ring respectively having limiting sealing grooves corresponding to the limiting parts, the limiting parts being disposed in the limiting sealing grooves, and the sealing parts extending out of the limiting sealing grooves and connecting with the disc plate.

[0008] Preferably, a fixing groove is provided on the valve body, and one end of the valve seat ring extends into the fixing groove and is connected to the valve body.

[0009] Preferably, the disc plate is further provided with a disc plate sealing surface on one side corresponding to the soft sealing ring and the hard sealing ring, and the disc plate sealing surface is connected to the sealing part and the hard sealing surface for sealing.

[0010] Preferably, a bearing is also provided between the valve body and the valve stem.

[0011] Preferably, a gasket is provided between the valve body and the hard sealing ring.

[0012] Preferably, the hard sealing ring is formed by laser hardening process.

[0013] The beneficial effects of this utility model are as follows: This design significantly improves the sealing performance and service life of the butterfly valve by incorporating a sealing connection device. Its unique sealing structure, combining multiple layers of protection including a sealing pressure ring, a hard sealing ring, and a soft sealing ring, effectively resists the scouring and scraping of small particles in the medium, reducing wear and scratches, thus ensuring the sealing stability of the valve during long-term use. Simultaneously, this design, through the cooperation of fasteners with the valve body, achieves a secure tightening of the sealing structure, further enhancing the reliability of the connection. Furthermore, key components in the sealing structure can be replaced independently and easily, simplifying the process and improving efficiency. Attached Figure Description

[0014] 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.

[0015] 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.

[0016] Figure label: 1. Valve body; 2. Valve stem; 3. Valve seat ring; 4. Disc; 5. Flow channel; 6. Sealing structure; 7. Sealing pressure ring; 8. Hard sealing ring; 9. Soft sealing ring; 10. Inclined surface; 11. Hard sealing surface; 12. Sealing ring body; 13. Sealing part; 14. Limiting part; 15. Limiting sealing groove; 16. Fixing groove; 17. Fastener; 18. Disc sealing surface; 19. Bearing; 20. Gasket; 21. Valve cover; 22. Annular sealing limiting part. Detailed Implementation

[0017] 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.

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] This utility model provides the following technical solution: As attached Figure 1-2 As shown, this utility model discloses a novel butterfly valve with a sealing structure. The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] This utility model provides the following technical solution: As attached Figure 1-2As shown, this utility model discloses a novel butterfly valve with a sealing structure, including a valve body 1, a valve stem 2, a valve seat ring 3, and a disc 4. A flow channel 5 is formed inside 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 ring 3 is disposed within the flow channel 5, and an annular sealing limiting part 22 protrudes from the inner wall of the flow channel. A sealing structure 6 is provided between the valve seat ring 3 and the annular sealing limiting part 22. The sealing structure 6 includes a sealing ring 7 connected to the valve seat ring 3, a hard sealing ring 8 connected to the sealing ring 7 for positioning, and a soft sealing ring 9 disposed between the sealing ring 7 and the hard sealing ring 8. A fastener 17 is provided on the valve seat ring 3, one end of which passes through the valve seat ring 3 and abuts against the sealing ring 7. One end of the valve seat ring 3 is connected to the valve body 1. The valve seat ring 3, in conjunction with the valve body 1, presses the sealing ring 7 and the hard sealing ring 8 together. The disc 4, in conjunction with the hard sealing ring 8 and the soft sealing ring 9, seals the flow channel 5 when it is closed. In this embodiment, the function of the sealing structure 6 is to form a multi-layered sealing barrier through the synergistic action of the sealing ring 7, the hard sealing ring 8, and the soft sealing ring 9 when the flow channel 5 is closed. Specifically, the sealing ring 7, in conjunction with the hard sealing ring 8, presses the soft sealing ring 9 between them, and the sealing groove formed by the two securely limits the soft sealing ring 9, effectively preventing fluid leakage from the edge of the sealing structure 6. The hard sealing ring 8 forms a rigid contact with the disc sealing surface 18 through its hard sealing surface 11, while the sealing part 13 of the soft sealing ring 9 fills the tiny gaps through elastic deformation, achieving a combined effect of rigid and flexible sealing. This structural design ensures the sealing reliability of the valve body 1 under high-pressure conditions and extends the service life of the sealing components through the elastic compensation function of the soft sealing ring 9, effectively preventing damage to the hard sealing ring 8 from particles or dust in some media. At the same time, the sealing pressure ring 7, together with the valve seat ring 3, compresses and limits the hard sealing ring 8, ensuring the stability of the hard sealing ring 8. When the hard sealing ring 8 is subjected to bidirectional compression from the disc 4 and the valve body 1, it can maintain a good sealing shape and is not prone to deformation or displacement.

[0022] Furthermore, the sealing ring 7 has fasteners 17 and hard sealing ring 8 tightly attached to both sides, and the sealing ring 7, together with the valve seat ring 3, presses and fixes the hard sealing ring 8. In this embodiment, the sealing ring 7 not only serves to press and fix, but its special structural design can also effectively disperse the pressure borne by the hard sealing ring 8, avoiding damage to the hard sealing ring 8 due to excessive local pressure. At the same time, the tight fit between the sealing ring 7, the valve seat ring 3, and the valve body 1 ensures the overall stability of the sealing structure, maintaining good sealing performance even under harsh conditions such as high temperature and high pressure. Specifically, the sealing ring 7 is also provided with an inclined surface 10, the height of which is slightly lower than the height of the sealing ring. When the disc 4 gradually approaches the sealing ring 7 during the closing process, the inclined surface 10 can play a good guiding role, making the contact between the disc 4 and the sealing ring 7 smoother and more unobstructed, avoiding damage to the sealing structure caused by the impact force generated by sudden collision. In this embodiment, the unique inclined surface 10 design of the sealing ring 7 adds multiple advantages to the entire sealing structure. This design effectively disperses the pressure at the moment of contact between the disc 4 and the sealing ring 7 when the disc 4 is closed, transforming the concentrated impact force into a smoother transition force, thereby greatly reducing the risk of damage to the sealing structure due to impact. Furthermore, the tight fit design of the sealing ring 7 against the valve body 1 and the hard sealing ring 8 on both sides ensures that the sealing ring 7 can stably transmit pressure to the hard sealing ring 8 when subjected to pressure from the valve seat ring 3. This keeps the hard sealing ring 8 in good contact with the valve body 1 and the disc 4, effectively preventing leakage of the medium inside the valve body 1 and ensuring the sealing performance and reliability of the butterfly valve. The design of the sealing ring 7 ensures both the limiting and fixing of the hard sealing ring 8 and the strength of the sealing ring 7, preventing breakage or damage caused by the impact or erosion of the medium during valve opening and closing.

[0023] Furthermore, the hard sealing ring 8 is provided with a hard sealing surface 11, which is located on the side near the disc and is arranged with an inclined structure. In this embodiment, the function of the hard sealing ring 8 is to form a direct and rigid contact between its hard sealing surface 11 and the disc sealing surface 18 when the flow channel 5 is closed, thereby constructing a solid sealing barrier. This rigid sealing method can effectively resist the impact of high-pressure media, ensuring that the valve can still maintain a tight sealing state under extreme operating conditions. In addition, the tight connection between the hard sealing ring 8, the sealing pressure ring 7, and the valve body 1 also ensures the integrity and consistency of the sealing structure, effectively preventing the leakage of media through the sealing gap.

[0024] Furthermore, the soft sealing ring 9 includes a sealing ring body 12, which has a sealing portion 13 and several limiting portions 14. The limiting portions 14 protrude towards the hard sealing ring 8 and the sealing pressure ring 7, respectively, while the sealing portion 13 protrudes towards the disc plate 4. The hard sealing ring 8 and the sealing pressure ring 7 are respectively provided with limiting sealing grooves 15 corresponding to the limiting portions 14. The limiting portions 14 are disposed within the limiting sealing grooves 15, and the sealing portions 13 extend out of the limiting sealing grooves 15 and connect with the disc plate 4. In this embodiment, the soft sealing ring 9, through its unique design of the sealing portion 13 and the limiting portion 14, achieves a tight connection with the hard sealing ring 8, the sealing pressure ring 7, and the disc plate 4. The sealing portion 13 protrudes towards the disc plate 4, enabling it to form a tight elastic contact with the disc plate sealing surface 18 when the disc plate 4 is closed, effectively filling the tiny gaps caused by manufacturing errors or wear during use, thereby greatly enhancing the reliability of the seal. Meanwhile, the limiting part 14 protrudes towards the hard sealing ring 8 and the sealing pressure ring 7 respectively, and is set in the corresponding limiting sealing groove 15. This design not only ensures the accurate positioning of the soft sealing ring 9 in the sealing structure, but also prevents it from shifting or falling off under the action of medium pressure, further ensuring the stability and durability of the sealing structure. In addition, the elastic material of the soft sealing ring 9 can also absorb and disperse part of the medium pressure, reducing the impact on the hard sealing ring 8 and the sealing pressure ring 7, thereby extending the service life of the entire sealing structure. The setting of the soft sealing ring makes the valve as a whole have a better sealing effect.

[0025] Furthermore, a fixing groove 16 is formed on the valve body 1, and one end of the valve seat ring 3 extends into the fixing groove 16 and connects to the valve body 1. In this embodiment, this structural design of the valve seat ring 3 allows it to be securely installed on the valve body 1. Simultaneously, the fastener 17 applies stable pressure to the sealing ring 7, ensuring a tight fit between the sealing ring 7, the hard sealing ring 8, and the soft sealing ring 9. The fastener 17 is designed not only for easy installation and disassembly but also to adjust the sealing pressure according to actual working conditions to meet the sealing requirements under different media and pressure conditions. The connection between the valve seat ring 3 and the valve body 1 ensures the stability and durability of the valve seat ring 3. In addition, the corresponding fixing groove 16 design on the valve seat ring 3 and the valve body 1 makes the installation of the valve seat ring 3 more precise and reliable, effectively preventing a decrease in sealing performance due to installation deviations. This valve seat ring 3 structural design not only improves the sealing reliability of the butterfly valve but also extends the service life of the valve seat ring 3 and reduces maintenance costs. In this embodiment, the fastener 17 is a bolt, and the type and size of the fastener 17 can be selected according to the specific situation and scenario.

[0026] Furthermore, a disc sealing surface 18 is provided on one side of the disc 4 corresponding to the soft sealing ring 9 and the hard sealing ring 8. The disc sealing surface 18 is connected to the sealing part 13 and the hard sealing surface 11 for sealing. In this embodiment, the function of the disc sealing surface 18 is to form a tight sealing connection with the sealing part 13 of the soft sealing ring 9 and the hard sealing surface 11 of the hard sealing ring 8 when the flow channel 5 is closed. This design allows the disc 4 to construct a double sealing barrier through effective contact between its sealing surface and the soft and hard sealing rings 8 when closed. The rigid contact between the disc sealing surface 18 and the hard sealing surface 11 ensures the sealing reliability of the valve under high pressure conditions and effectively resists the impact of the medium; while the flexible contact with the sealing part 13 of the soft sealing ring 9 fills the small gap between the disc 4 and the hard sealing ring 8 through the elastic deformation of the soft sealing ring 9, and further prevents the leakage of some small particulate media.

[0027] Furthermore, a bearing 19 is provided between the valve body 1 and the valve stem 2. In this embodiment, the bearing 19 provides rotational support for friction between the valve body 1 and the valve stem 2, ensuring that the valve stem 2 can rotate smoothly, thereby driving the disc 4 to achieve accurate opening and closing actions. This bearing 19 design not only reduces the frictional resistance when the valve stem 2 rotates and lowers the operating torque, making the opening and closing of the butterfly valve easier and more convenient, but also extends the service life of the valve stem 2 and the valve body 1, reducing wear caused by frequent friction.

[0028] Furthermore, a gasket 20 is provided between the valve body 1 and the hard sealing ring 8. In this embodiment, the gasket 20 serves to provide a soft buffer layer between the valve body 1 and the hard sealing ring 8, effectively dispersing the pressure borne by the hard sealing ring 8 and preventing wear and damage caused by direct contact. Simultaneously, the gasket 20 also functions as a seal, preventing leakage of the medium through the tiny gap between the valve body 1 and the hard sealing ring 8, thereby further improving the sealing performance of the butterfly valve.

[0029] Furthermore, the hard sealing ring 8 is formed through a laser hardening process. In this embodiment, the hard sealing ring 8 formed by laser hardening exhibits extremely high hardness and wear resistance. This treatment method allows for precise control of the depth and hardness distribution of the hardened layer, enabling the hard sealing ring 8 to maintain high hardness while also possessing excellent fatigue resistance and corrosion resistance. Under high pressure, high speed, or corrosive media conditions, the laser-hardened sealing surface can effectively resist the erosion and corrosion of the media, ensuring that the hard sealing ring 8 maintains stable sealing performance over a long period. In addition, the laser hardening process also has advantages such as high processing precision and minimal deformation, ensuring the flatness and smoothness of the hard sealing surface, thereby further improving the sealing effect. This advanced surface treatment technology provides a strong guarantee for the reliable operation of the butterfly valve under harsh conditions.

[0030] In this embodiment, a valve cover 21 is also provided on the valve body 1. The valve cover 21 is connected to the valve body 1 by bolts. This connection method is stable and reliable, ensuring a tight fit between the valve cover 21 and the valve body 1, preventing leakage of the medium from the connection point. The valve cover 21 not only protects the internal structure of the valve body 1, preventing external impurities from entering the valve body 1 and affecting the normal operation of the butterfly valve, but also provides support and positioning for the upper end of the valve stem 2.

[0031] 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 butterfly valve with a sealing structure, comprising a valve body, a valve stem, a valve seat ring, 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 flow channel and connects with the disc, characterized in that: The valve seat ring is disposed within the flow channel, and an annular sealing and limiting part protrudes from the inner wall of the flow channel. A sealing structure is provided between the valve seat ring and the annular sealing and limiting part. The sealing structure includes a sealing pressure ring connected to the valve seat ring, a hard sealing ring connected to the sealing pressure ring, and a soft sealing ring disposed between the sealing pressure ring and the hard sealing ring. Fasteners are provided on the valve seat ring, one end of which passes through the valve seat ring and abuts against the sealing pressure ring. One end of the valve seat ring is connected to the valve body. The valve seat ring cooperates with the valve body to press the sealing pressure ring and the hard sealing ring. The disc, in conjunction with the hard sealing ring and the soft sealing ring, seals the flow channel when it is closed.

2. The novel butterfly valve with a sealing structure according to claim 1, characterized in that: The sealing ring has fasteners and hard sealing rings tightly attached to both sides, and the sealing ring, together with the valve seat ring, presses and fixes the hard sealing ring.

3. A novel butterfly valve with a sealing structure according to claim 1, characterized in that: The hard sealing ring is provided with a hard sealing surface, which is located on the side near the disc plate and is arranged with an inclined structure.

4. A novel butterfly valve with a sealing structure according to claim 3, characterized in that: The soft sealing ring includes a sealing ring body, which has a sealing part and several limiting parts. The limiting parts protrude towards the hard sealing ring and the sealing pressure ring, respectively, and the sealing part protrudes towards the disc plate. The hard sealing ring and the sealing pressure ring are respectively provided with limiting sealing grooves corresponding to the limiting parts. The limiting parts are disposed in the limiting sealing grooves, and the sealing parts extend out of the limiting sealing grooves and connect with the disc plate.

5. A novel butterfly valve with a sealing structure according to claim 1, characterized in that: A fixing groove is provided on the valve body, and one end of the valve seat ring extends into the fixing groove and is connected to the valve body.

6. A novel butterfly valve with a sealing structure according to claim 3, characterized in that: The disc plate is also provided with a disc plate sealing surface on one side corresponding to the hard sealing surface. The disc plate sealing surface is connected to the sealing part and the hard sealing surface for sealing.

7. A novel butterfly valve with a sealing structure according to claim 1, characterized in that: A bearing is also provided between the valve body and the valve stem.

8. A novel butterfly valve with a sealing structure according to claim 3, characterized in that: A gasket is provided between the valve body and the hard sealing ring.

9. A novel butterfly valve with a sealing structure according to claim 4, characterized in that: The hard sealing ring is formed by laser hardening process.

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