High-performance center line-type butterfly valve

Abstract

The utility model belongs to the technical field of butterfly valves, and discloses a high-performance center line-type butterfly valve which comprises a valve body, a valve seat is installed in the valve body, a valve rod is arranged in the valve seat in a penetrating mode, a butterfly plate is installed on the outer wall of the valve rod, the valve rod drives the butterfly plate through rotation, the outer edge of the butterfly plate and the valve seat form a sealing pair, and the valve seat and the butterfly plate are connected through a connecting rod. A sealing ring is installed on the outer side of the butterfly plate, the sealing pair is of a spherical surface structure design, the outer edge of the sealing ring is also of a spherical surface structure, in the using process of the butterfly valve, the sealing pair and the sealing ring are of the spherical surface structure design, the sealing position of the valve seat and the butterfly plate is specially processed, and the contact portion is in smooth transition. Therefore, in the opening and closing process of the valve body, the sealing pair can achieve smooth displacement, and friction and abrasion are greatly reduced. Therefore, the torque needed by the valve body in the operation process is small, the operation difficulty is reduced, the service life of the valve body is remarkably prolonged, and the overall reliability of the valve body is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, and specifically relates to a high-performance centerline butterfly valve. Background Technology

[0002] A butterfly valve is a simple and easy-to-operate valve that controls the flow of fluid in a pipeline or regulates the flow rate by rotating a disc-shaped butterfly plate. Its main components include the valve body, butterfly plate, valve stem, and sealing ring. It features low fluid resistance, rapid opening and closing, good sealing performance, and a wide range of applications, making it widely used in water supply and drainage, petrochemical, power industry, food and pharmaceutical fields.

[0003] In current butterfly valve applications, ordinary center-lined rubber-lined butterfly valves have some performance shortcomings. Specifically, both the valve seat and the butterfly plate have a flat sealing design. This leads to increased friction and torque between the butterfly plate and the valve seat as the valve is about to close, making operation more laborious. Furthermore, this flat sealing design has limitations in sealing effectiveness, making it difficult to achieve optimal sealing performance. More importantly, during frequent opening and closing, the flat contact causes significant wear on the valve seat. Over time, the sealing performance of the valve seat will further deteriorate, ultimately shortening the overall service life of the butterfly valve. This not only increases maintenance and replacement costs but also affects the stability and reliability of the system. Utility Model Content

[0004] The purpose of this utility model is to provide a high-performance centerline butterfly valve to solve the problems mentioned in the background art, such as the large torque, poor sealing, easy wear, shortened life and increased maintenance cost of ordinary centerline rubber-lined butterfly valves due to their planar sealing design.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-performance centerline butterfly valve, comprising: a valve body, a valve seat installed inside the valve body, a valve stem passing through the valve seat, a butterfly plate installed on the outer wall of the valve stem, the valve stem driving the butterfly plate by rotation, the outer edge of the butterfly plate forming a sealing pair with the valve seat, a sealing ring installed on the outer side of the butterfly plate, the sealing pair adopting a spherical structure design, the outer edge of the sealing ring also having a spherical structure, and the sealing pair and the sealing ring being adapted to each other.

[0006] Preferably, a pin is installed between the butterfly plate and the valve stem;

[0007] An O-ring is installed at the neck of the valve body, and packing is installed inside the valve body. A gland is installed inside the packing, and the gland is connected to the valve body by bolts.

[0008] An actuator is installed on the outer wall of the valve body, and the output end of the actuator is connected to the valve stem.

[0009] Through the above technical solution:

[0010] In use, the valve body, as the core structure of the butterfly valve, not only provides a stable installation foundation for other key components, but also achieves precise positioning and fixation with the valve seat through its grooves, ensuring the stability and sealing of the entire valve. The ingenious design of the pins on the butterfly plate and valve stem allows the butterfly plate and valve stem to be tightly connected, ensuring that they move in tandem during operation without any loosening or jamming.

[0011] An O-ring is installed at the neck of the valve body. This design significantly enhances the valve's sealing performance and prevents media leakage at the connection between the valve stem and the valve body. The upper end of the valve body is fitted with packing material, and a gland is installed inside the packing. The gland applies appropriate pressure to the packing material, ensuring a reliable seal between the valve stem and the packing gland, further preventing media leakage.

[0012] The actuator, connected to the valve stem, precisely drives the stem to rotate, thereby actuating the disc to open and close, achieving effective regulation and control of the valve body's flow path. This design not only ensures operational flexibility but also guarantees a smooth and accurate regulation process.

[0013] The valve seat and butterfly plate together form a sealing pair, with the sealing ring installed on the outer wall of the butterfly plate, forming a precise fit with the valve seat. The sealing pair adopts a spherical structure design, and the sealing position between the valve seat and the butterfly plate is specially treated, with a smooth transition at the contact point, ensuring a smooth transition of the sealing pair during the opening and closing of the valve body, reducing friction and wear.

[0014] This spherical sealing pair not only forms an effective seal upon contact, ensuring zero leakage performance of the valve, but also, due to its design features, requires less torque during valve operation, reducing operational difficulty. Simultaneously, valve seat wear is significantly reduced, thereby substantially improving the valve body's service life and overall reliability.

[0015] In summary, through precise design and optimized combination of its components, the butterfly valve achieves efficient, reliable, and long-life operation, meeting the high performance standards of modern industry.

[0016] Connecting pipes are installed at both ends of the side of the valve body. An annular plate is surrounded by the connecting pipes at both ends. Movable components are provided between the annular plate and the connecting pipe. Multiple arc-shaped plates are provided inside the annular plate. Springs are connected between the annular plate and the arc-shaped plates. The outer walls of these arc-shaped plates are all fitted with soft pads.

[0017] Preferably, the movable component includes a movable groove and a movable block. The movable groove is formed on the outer wall of the connecting pipe, and the movable block is installed on the inner wall of the annular plate. The movable groove and the movable block are adapted to each other, and a limiting component is provided between the movable block and the connecting pipe.

[0018] The limiting assembly includes a fixed rod, a limiting plate, and a limiting rod. The fixed rod is installed on the outer wall of the connecting pipe. The limiting plate is installed on the fixed rod by a movable connection. A limiting groove is formed in the limiting plate. The limiting rod is installed on the outer wall of the connecting pipe, and the limiting groove and the limiting rod are adapted to each other. The limiting plate can apply force to the movable block.

[0019] Through the above technical solution:

[0020] In use, the connecting pipes are symmetrically installed on both sides of the valve body, and their main function is to achieve a reliable connection between the butterfly valve and the external piping system. To enhance the stability and sealing of the connection, an annular plate is designed to wrap around the outside of the connecting pipe, forming a protective structural frame.

[0021] After the connecting pipe and piping system are tightly connected, the operator pushes the annular plate towards the side where the piping system is installed. During this process, the movable block moves precisely linearly within the movable groove until the soft pad on the arc plate is tightly fitted against the connection between the connecting pipe and the piping system. At this point, the spring begins to function, providing continuous elasticity to ensure tight contact between the soft pad and the connection. This design not only significantly enhances the sealing performance of the connection but also provides effective cushioning protection when the piping system is subjected to external impacts or pressure, preventing equipment damage due to mechanical shock and thus greatly extending the service life of the equipment.

[0022] After the annular plate is moved to the predetermined position and the soft pad is properly fitted, the operator needs to rotate the limiting plate so that it spans the movable groove, thereby preventing the movable block from moving further backward. The advancing end of the movable block is the end of the movable groove. This step ensures that the annular plate is firmly fixed in the correct position, preventing it from shifting during subsequent use.

[0023] Finally, to further secure the limiting plate, press it down so that the limiting rod passes through the limiting groove, thereby locking the limiting plate in its current position. This locking mechanism ensures that the limiting plate will not loosen due to vibration or external force, thus guaranteeing the long-term stability and reliability of the entire connection structure.

[0024] Through the above steps, the connection between the butterfly valve and the pipeline system not only achieves a high degree of sealing and stability, but also has excellent buffer protection function, effectively improving the overall performance and durability of the equipment.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] (1) This utility model, through a special design, employs a spherical sealing pair and a sealing ring with a specific edge design, effectively reducing wear on the valve seat. In actual use, the sealing pair and sealing ring adopt a spherical structure design, and the sealing position between the valve seat and the butterfly plate is specially treated, with a smooth transition at the contact point. In this way, the sealing pair can achieve smooth displacement during the opening and closing of the valve body, greatly reducing friction and wear. This results in a lower torque required for valve body operation, reducing the difficulty of operation. At the same time, the wear of the valve seat is greatly reduced, thereby significantly improving the service life of the valve body and its overall reliability.

[0027] (2) This utility model effectively protects the connection between the pipeline system and the valve body by incorporating components such as an annular plate, an arc-shaped plate, a soft pad, and a spring. In practical applications, pushing the annular plate causes the soft pad on the arc-shaped plate to fit tightly against the connection between the connecting pipe and the pipeline system. The spring provides continuous elasticity, ensuring that the soft pad remains in close contact with the connection. This design not only significantly improves the sealing performance of the connection but also provides effective buffering protection when the pipeline system is subjected to external impacts or pressure, preventing damage to the equipment due to mechanical shock and thus greatly extending the service life of the equipment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the sealing pair of this utility model;

[0030] Figure 3 This is a schematic diagram of the sealing ring structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the annular plate of this utility model;

[0032] Figure 5 This is a schematic diagram of the connecting pipe of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the spring of this utility model;

[0034] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve stem; 4. Butterfly plate; 6. Pin; 7. Sealing ring; 8. O-ring; 9. Packing; 10. Gland; 11. Actuator; 12. Sealing pair; 13. Connecting pipe; 14. Annular plate; 15. Arc plate; 16. Soft pad; 17. Spring; 18. Movable groove; 19. Movable block; 20. Fixed rod; 21. Limiting plate; 22. Limiting groove; 23. Limiting rod. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1-3 As shown, this utility model provides the following technical solution: a high-performance centerline butterfly valve, comprising: a valve body 1, a valve seat 2 installed inside the valve body 1, a valve stem 3 passing through the valve seat 2, a butterfly plate 4 installed on the outer wall of the valve stem 3, the valve stem 3 driving the butterfly plate 4 by rotation, the outer edge of the butterfly plate 4 and the valve seat 2 forming a sealing pair 12, a sealing ring 7 installed on the outer side of the butterfly plate 4, the sealing pair 12 adopts a spherical structure design, the outer edge of the sealing ring 7 also has a spherical structure, and the sealing pair 12 and the sealing ring 7 are adapted to each other.

[0037] Furthermore, a pin 6 is installed between the butterfly plate 4 and the valve stem 3;

[0038] An O-ring 8 is installed at the neck of the valve body 1. The valve body 1 contains packing 9, and a gland 10 is provided inside the packing 9. The gland 10 is connected to the valve body 1 by bolts.

[0039] An actuator 11 is installed on the outer wall of the valve body 1, and the output end of the actuator 11 is connected to the valve stem 3.

[0040] Through the above technical solution:

[0041] In use, the valve body 1, as the core structure of the butterfly valve, not only provides a stable installation foundation for other key components, but also achieves precise positioning and fixation with the valve seat 2 through its groove, ensuring the stability and sealing of the entire valve. The cleverly designed pins 6 on the butterfly plate 4 and valve stem 3 allow the butterfly plate 4 and valve stem 3 to be tightly connected, ensuring that the two move in tandem during operation without any loosening or jamming.

[0042] An O-ring 8 is installed at the neck of the valve body 1. This design significantly enhances the valve's sealing performance and prevents leakage of the medium at the connection between the valve stem 3 and the valve body 1. A packing 9 is installed at the upper end of the valve body 1. A gland 10 is installed inside the packing 9. Appropriate pressure is applied to the packing 9 through the gland 10 to ensure a reliable seal is formed between the valve stem 3 and the packing 9, further preventing medium leakage.

[0043] Actuator 11, connected to valve stem 3, can precisely drive valve stem 3 to rotate, thereby driving butterfly plate 4 to open and close, achieving effective regulation and control of the flow channel of valve body 1. This design not only ensures operational flexibility but also guarantees a smooth and accurate regulation process.

[0044] The valve seat 2 and the butterfly plate 4 together form a sealing pair 12, wherein the sealing ring 7 is installed on the outer wall of the butterfly plate 4 and forms a precision fit with the valve seat 2. The sealing pair 12 adopts a spherical structure design, and the sealing position between the valve seat 2 and the butterfly plate 4 is specially treated, with a smooth transition at the contact part, ensuring that the sealing pair 12 can achieve a smooth transition during the opening and closing of the valve body 1, reducing friction and wear.

[0045] This spherical sealing pair 12 not only forms an effective seal upon contact, ensuring zero leakage performance of the valve, but also, due to its design features, requires less torque from the valve body 1 during operation, reducing operational difficulty. Simultaneously, wear on the valve seat 2 is significantly reduced, thereby substantially improving the service life and overall reliability of the valve body 1.

[0046] In summary, through precise design and optimized combination of its components, the butterfly valve achieves efficient, reliable, and long-life operation, meeting the high performance standards required by modern industry.

[0047] Please see Figure 1 and Figures 4-6 As shown, connecting pipes 13 are installed at both ends of the side of the valve body 1. Annular plates 14 are arranged around the connecting pipes 13 at both ends. Movable components are provided between the annular plates 14 and the connecting pipes 13 at both ends. Multiple arc-shaped plates 15 are provided inside the annular plates 14. Springs 17 are connected between the annular plates 14 and the arc-shaped plates 15. Soft pads 16 are installed on the outer walls of these arc-shaped plates 15.

[0048] Furthermore, the movable component includes a movable groove 18 and a movable block 19. The movable groove 18 is formed on the outer wall of the connecting pipe 13, and the movable block 19 is installed on the inner wall of the annular plate 14. The movable groove 18 and the movable block 19 are adapted to each other, and a limiting component is provided between the movable block 19 and the connecting pipe 13.

[0049] The limiting assembly includes a fixed rod 20, a limiting plate 21, and a limiting rod 23. The fixed rod 20 is installed on the outer wall of the connecting pipe 13. The limiting plate 21 is installed on the fixed rod 20 by a movable connection. A limiting groove 22 is formed in the limiting plate 21. The limiting rod 23 is installed on the outer wall of the connecting pipe 13, and the limiting groove 22 and the limiting rod 23 are adapted to each other. The limiting plate 21 can apply force to the movable block 19.

[0050] Through the above technical solution:

[0051] In use, the connecting pipes 13 are symmetrically installed on both ends of the valve body 1. Their main function is to achieve a reliable connection between the butterfly valve and the external piping system. To enhance the stability and sealing of the connection, the annular plate 14 is designed to surround the outside of the connecting pipes 13, forming a protective structural frame.

[0052] After the connecting pipe 13 is tightly connected to the piping system, the operator needs to push the annular plate 14 towards the side where the piping system is installed. During this process, the movable block 19 moves precisely linearly within the movable groove 18 until the soft pad 16 on the arc plate 15 is tightly fitted at the connection between the connecting pipe 13 and the piping system. At this point, the spring 17 begins to function, providing continuous elasticity to ensure that the soft pad 16 is in close contact with the connection. This design not only significantly enhances the sealing performance of the connection but also provides effective buffering protection when the piping system is subjected to external impacts or pressure, preventing equipment damage due to mechanical shock and thus greatly extending the service life of the equipment.

[0053] After the annular plate 14 is moved to the predetermined position and the soft pad 16 is properly fitted, the operator needs to rotate the limiting plate 21 so that it spans the movable groove 18, thereby preventing the movable block 19 from retracting further. The advancing end of the movable block 19 is the end of the movable groove 18. This step ensures that the annular plate 14 is firmly fixed in the correct position, preventing it from shifting during subsequent use.

[0054] Finally, to further secure the limiting plate 21, it is necessary to press down on the limiting plate 21 so that the limiting rod 23 passes through the limiting groove 22, thereby locking the limiting plate 21 in its current position. This locking mechanism ensures that the limiting plate 21 will not loosen due to vibration or external force, thus guaranteeing the long-term stability and reliability of the entire connection structure.

[0055] Through the above steps, the connection between the butterfly valve and the pipeline system not only achieves a high degree of sealing and stability, but also has excellent buffer protection function, effectively improving the overall performance and durability of the equipment.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-performance centerline butterfly valve, characterized in that, include: A valve body (1) is provided with a valve seat (2) inside the valve body (1). A valve stem (3) passes through the valve seat (2). A butterfly plate (4) is installed on the outer wall of the valve stem (3). The valve stem (3) drives the butterfly plate (4) by rotation. The outer edge of the butterfly plate (4) and the valve seat (2) form a sealing pair (12). A sealing ring (7) is installed on the outer side of the butterfly plate (4). The sealing pair (12) adopts a spherical structure design. The outer edge of the sealing ring (7) is also spherical. The sealing pair (12) and the sealing ring (7) are compatible. The valve body (1) has connecting pipes (13) installed at both ends of its side. Annular plates (14) are arranged around the connecting pipes (13) at both ends. Movable components are provided between the annular plates (14) at both ends and the connecting pipes (13). Multiple arc plates (15) are provided inside the annular plates (14). Springs (17) are connected between the annular plates (14) and the arc plates (15). The outer walls of these arc plates (15) are all equipped with pads (16).

2. The high-performance centerline butterfly valve according to claim 1, characterized in that: The movable component includes a movable groove (18) and a movable block (19). The movable groove (18) is opened on the outer wall of the connecting pipe (13), and the movable block (19) is installed on the inner wall of the annular plate (14). The movable groove (18) and the movable block (19) are adapted to each other, and a limiting component is provided between the movable block (19) and the connecting pipe (13).

3. The high-performance centerline butterfly valve according to claim 2, characterized in that: The limiting assembly includes a fixed rod (20), a limiting plate (21), and a limiting rod (23). The fixed rod (20) is installed on the outer wall of the connecting pipe (13). The limiting plate (21) is installed on the fixed rod (20) by a movable connection. A limiting groove (22) is opened in the limiting plate (21). The limiting rod (23) is installed on the outer wall of the connecting pipe (13), and the limiting groove (22) and the limiting rod (23) are adapted to each other. The limiting plate (21) can apply force to the movable block (19).

4. The high-performance centerline butterfly valve according to claim 1, characterized in that: A pin (6) is installed between the butterfly plate (4) and the valve stem (3).

5. A high-performance centerline butterfly valve according to claim 1, characterized in that: An O-ring (8) is installed at the neck position of the valve body (1), and a packing (9) is installed inside the valve body (1). A gland (10) is provided inside the packing (9), and the gland (10) is connected to the valve body (1) by bolts.

6. A high-performance centerline butterfly valve according to claim 1, characterized in that: An actuator (11) is installed on the outer wall of the valve body (1), and the output end of the actuator (11) is connected to the valve stem (3).

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