Soft and hard double-seal butterfly valve

Abstract

The invention belongs to the technical field of valves, and discloses a soft and hard double-sealing butterfly valve which comprises a valve body, a sealing baffle is fixedly connected to one side of an inner cavity of the valve body, an arc-shaped groove is formed in the side, close to the sealing baffle, of the inner cavity of the valve body, and evenly-distributed springs are installed on the inner wall of the arc-shaped groove. According to the butterfly valve, when the valve body needs to be opened, the rotating disc is rotated reversely to enable the valve rod to rotate reversely, the second connecting rod and the first rotating rod drive the fifth connecting rod and the connecting disc to rotate in the reverse rotation process of the valve rod to enable the butterfly plate to be separated from the sealing baffle, and when the butterfly plate is separated from the sealing baffle, the sealing ring is fixedly connected to the valve rod. The sealing ring is pulled back into the arc-shaped groove through the pulling force of the spring, when the sealing ring moves into the arc-shaped groove, the abutting-against plate is extruded through the abutting-against groove so that the abutting-against plate can be reset, abutting-against of the sealing ring to the butterfly plate is relieved, and friction between the butterfly plate and the inner wall of the valve body can be avoided when the butterfly plate is rotated.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, in particular to a soft and hard double-sealed butterfly valve. Background Art

[0002] The soft and hard double seal butterfly valve is a valve that combines soft and hard seals. It uses soft sealing materials (such as rubber or PTFE) to provide good sealing under low pressure and normal working conditions, and uses hard sealing materials (such as metal) to ensure the sealing stability under high temperature, high pressure or harsh working environment. It is widely used in fluid control systems in the petroleum, chemical, electric power and other industries. The design of this valve can effectively solve the sealing problem in high pressure, corrosive or high temperature fluid media, ensure long-term safe operation, and avoid the risk of leakage caused by sealing failure. The soft seal part is usually installed around the butterfly plate, relying on the deformation of the elastic material to form a close contact with the valve seat. Sealing, while hard seals are mostly located in the valve seat part, with strong wear resistance and pressure resistance, allowing the valve to withstand more complex working conditions. Through the dual protection of soft and hard seals, this valve can maintain high-efficiency and stable sealing performance under various working conditions, prevent medium leakage, and ensure the safe operation of industrial systems. In addition, the soft and hard double-sealed butterfly valve also has excellent corrosion resistance and can be used in acidic and alkaline and easily corrosive fluid environments to extend the service life of the valve. The soft and hard double-sealed butterfly valve, with its unique sealing design, meets the sealing requirements under a variety of complex working conditions and is an indispensable key equipment in many occasions that require high reliability and efficient fluid control.

[0003] The sealing design of existing butterfly valves usually relies on the close fit between the outer ring of the butterfly plate and the inner wall of the valve body to achieve sealing. However, during long-term use, the opening and closing action of the butterfly plate will cause friction between the butterfly plate and the inner wall of the valve body. This friction will not only cause wear on the surface of the valve body and the butterfly plate, but may also affect the sealing effect. When the wear gradually increases, the close fit between the sealing surfaces decreases, resulting in a decrease in sealing performance and a risk of leakage. Summary of the invention

[0004] In order to solve the problem raised in the above background technology that during long-term use, the opening and closing action of the butterfly plate will cause friction between the butterfly plate and the inner wall of the valve body, and this friction will not only cause wear on the surface of the valve body and the butterfly plate, but may also affect the sealing effect. When the wear gradually increases, the tight fit between the sealing surfaces is reduced, thereby resulting in a decrease in sealing performance and a risk of leakage. The present invention provides a soft and hard double-sealed butterfly valve.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a soft and hard double-sealed butterfly valve, comprising a valve body, a sealing baffle is fixedly connected to one side of the inner cavity of the valve body, an arc groove is provided on the side of the inner cavity of the valve body close to the sealing baffle, a uniformly distributed spring is installed on the inner wall of the arc groove, a sealing ring is fixedly connected to the side of the spring away from the arc groove, and the sealing ring slides in the arc groove, a uniformly distributed resistance groove is provided on the side of the sealing ring close to the arc groove, an output groove is provided on the inner wall of one side of the sealing baffle, and the sealing ring is provided in the inner wall of the inner cavity of the valve body. The inner cavity of the output groove is rotatably connected to an output rod, one side of the outer wall of the output rod is fixedly connected to two connecting rods 1, the two connecting rods 1 are rotatably connected to the side away from the output rod, and the output plate penetrates the sealing baffle and is slidably connected, the outer wall of the output rod on the side away from the connecting rod 1 is fixedly connected to the toggle plate 1, the bottom of the inner cavity of the output groove penetrates the valve body and is slidably connected to a resistance plate, and the resistance plate cooperates with the resistance groove, and the top side of the resistance plate is fixedly connected to the toggle plate 2, and the toggle plate 2 cooperates with the toggle plate 1.

[0006] Preferably, a valve stem passes through and is rotatably connected to the middle of the valve body, two connecting rods 2 are fixedly connected to one side of the outer wall of the valve stem, and a rotating rod 1 is rotatably connected between the two connecting rods 2.

[0007] Preferably, a connecting rod three is fixedly connected to one side of the middle part of the inner cavity of the valve body, and the end of the connecting rod three away from the valve body passes through and is rotatably connected to the rotating rod two, the rotating rod two passes through the connecting rod three and is fixedly connected to connecting rods four on both sides, the rotating rod three passes through and is rotatably connected between the two connecting rods four, the rotating rod three passes through one side of the two connecting rods four and is fixedly connected to two connecting rods five, and the middle parts of the two connecting rods five pass through and are rotatably connected to the rotating rod one.

[0008] Preferably, one end of the two connecting rods five away from the rotating rod three is fixedly connected with a connecting disk, and one end of the connecting disk away from the connecting rod five is installed with a butterfly plate, and the butterfly plate cooperates with the sealing baffle and the output plate.

[0009] Preferably, a sealing tube is installed on one side of the outer wall of the valve body, and the sealing tube matches the valve stem.

[0010] Preferably, a sealing disk is installed on a side of the sealing tube away from the valve body, and the valve stem passes through the sealing disk.

[0011] Preferably, an output pipe is installed on a side of the sealing disk away from the sealing pipe, and the valve stem passes through the output pipe.

[0012] Preferably, a mounting disk is installed on the side of the output pipe away from the sealing disk, a turbine box is installed on the side of the mounting disk away from the output pipe, and the top of the valve stem passes through the mounting disk and is installed inside the turbine box.

[0013] Preferably, a turntable is installed on one side of the top of the turbine box, and the turntable cooperates with a spring.

[0014] Preferably, flanges are fixedly connected to both sides of the outer wall of the valve body, and the water pipes are connected via the flanges.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention can avoid friction with the inner wall of the valve body when the butterfly plate is rotated, thereby reducing the sealing performance of the butterfly valve. When the valve body needs to be opened, the turntable is rotated in the opposite direction to reverse the valve stem. During the reversal of the valve stem, the connecting rod 5 and the connecting disk are driven to rotate through the connecting rod 2 and the rotating rod 1 to separate the butterfly plate from the sealing baffle. When the butterfly plate separates from the sealing baffle, the sealing ring is pulled back into the arc groove by the tension of the spring. When the sealing ring moves into the arc groove, the resistance plate is squeezed through the resistance groove to reset the resistance plate, thereby releasing the resistance of the sealing ring to the butterfly plate.

[0016] The present invention avoids friction with the inner wall of the valve body and the sealing ring when the butterfly plate is rotated through the cooperation of structures such as the butterfly plate and the sealing baffle, thereby increasing the service life of the butterfly plate and the sealing ring. In the process of the butterfly plate moving to fit the sealing baffle, the butterfly plate will first contact the output plate, causing the output plate to slide into the sealing baffle. When the output plate slides into the sealing baffle, the connecting rod one rotates in the output plate, and the output rod is rotated by the connecting rod one. When the output rod rotates, it will drive the toggle plate one to move so that the toggle plate one contacts the toggle plate two, driving the contact plate to move forward, so that the contact plate slides forward into the contact groove, and then the contact plate will continue to move forward to lift the sealing ring upward, and at the same time stretch the spring. When the butterfly plate is completely fitted with the sealing baffle, the sealing ring surrounds and fits the outer ring of the butterfly plate to seal it through the sliding of the contact plate in the contact groove, and the butterfly plate is wrapped by squeezing the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the connecting rod of the present invention; Figure 3 It is a schematic diagram of the sealing ring of the present invention; Figure 4 A side sectional view of the valve body of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the output plate of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8This is a schematic diagram of the sealing tube of the present invention; Fig. 9 For the present invention Figure 8 Enlarged view of center C.

[0018] In the figure: 1. valve body; 2. sealing baffle; 3. arc groove; 4. spring; 5. sealing ring; 6. resistance groove; 7. output rod; 8. connecting rod 1; 9. output plate; 10. toggle plate 1; 11. resistance plate; 12. toggle plate 2; 13. output groove; 14. valve stem; 15. connecting rod 2; 16. rotating rod 1; 17. connecting rod 3; 18. rotating rod 2; 19. connecting rod 4; 20. rotating rod 3; 21. connecting rod 5; 22. connecting plate; 23. butterfly plate; 24. sealing tube; 25. sealing plate; 26. output pipe; 27. mounting plate; 28. turbine box; 29. ​​turntable; 30. flange. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 9 As shown, the present invention provides a soft and hard double-sealed butterfly valve, comprising a valve body 1, a sealing baffle 2 is fixedly connected to one side of the inner cavity of the valve body 1, an arc groove 3 is provided on the side of the inner cavity of the valve body 1 close to the sealing baffle 2, and a uniformly distributed spring 4 is installed on the inner wall of the arc groove 3, a sealing ring 5 is fixedly connected to the side of the spring 4 away from the arc groove 3, and the sealing ring 5 slides in the arc groove 3, and a uniformly distributed resistance groove 6 is provided on the side of the sealing ring 5 close to the arc groove 3, an output groove 13 is provided on the inner wall of one side of the sealing baffle 2, and the inner cavity of the output groove 13 is rotatably connected to An output rod 7, one side of the outer wall of the output rod 7 is fixedly connected with two connecting rods 8, the two connecting rods 8 are rotatably connected with an output plate 9 on the side away from the output rod 7, and the output plate 9 penetrates the sealing baffle 2 and is slidably connected, the outer wall of the output rod 7 on the side away from the connecting rod 8 is fixedly connected with a toggle plate 10, the bottom of the inner cavity of the output groove 13 penetrates the valve body 1 and is slidably connected with a resistance plate 11, and the resistance plate 11 cooperates with the resistance groove 6, and a toggle plate 2 12 is fixedly connected to the top side of the resistance plate 11, and the toggle plate 2 12 cooperates with the toggle plate 10.

[0021] The above scheme is adopted: in the process that the butterfly plate 23 moves to fit the sealing baffle 2, the butterfly plate 23 will first contact the output plate 9, so that the output plate 9 slides into the sealing baffle 2. When the output plate 9 slides into the sealing baffle 2, the connecting rod 1 8 rotates in the output plate 9, and the output rod 7 is rotated through the connecting rod 1 8. When the output rod 7 rotates, it will drive the toggle plate 10 to move so that the toggle plate 10 contacts the toggle plate 2 12, and drive the contact plate 11 to move forward, so that the contact plate 11 slides forward into the contact groove 6, and then the contact plate 11 will continue to move forward to push the sealing ring 5 upward, and at the same time stretch the spring 4. When the butterfly plate 23 is completely fitted with the sealing baffle 2, the sealing ring 5 surrounds and fits the outer ring of the butterfly plate 23 through the sliding of the contact plate 11 in the contact groove 6 to seal, thereby increasing the service life of the butterfly plate 23 and the sealing ring 5. The sealing ring 5 is made of rubber. The molecular structure of rubber and similar elastic materials can be stretched and store a certain amount of strain energy when subjected to tension. The output plate 9 protrudes from the sealing baffle 2 when the butterfly plate 23 is opened, and the output plate 9 is squeezed to completely enter the sealing baffle 2 when the butterfly plate 23 is closed.

[0022] like Figures 1 to 9 As shown, a valve stem 14 is passed through and rotatably connected to the middle of the valve body 1, and two connecting rods 15 are fixedly connected to one side of the outer wall of the valve stem 14, and a rotating rod 16 is rotatably connected between the two connecting rods 15; A connecting rod 3 17 is fixedly connected to one side of the middle part of the inner cavity of the valve body 1, and one end of the connecting rod 3 17 away from the valve body 1 penetrates and is rotatably connected to a rotating rod 2 18, and the rotating rod 2 18 penetrates both sides of the connecting rod 3 17 and is fixedly connected to connecting rods 4 19, and a rotating rod 3 20 penetrates and is rotatably connected between the two connecting rods 4 19, and the rotating rod 3 20 penetrates one side of the two connecting rods 4 19 and is fixedly connected to two connecting rods 5 21, and the middle parts of the two connecting rods 5 21 penetrate and are rotatably connected to the rotating rod 1 16; One end of the two connecting rods 5 21 away from the rotating rod 3 20 is fixedly connected with a connecting disk 22, and one end of the connecting disk 22 away from the connecting rod 5 21 is installed with a butterfly plate 23, and the butterfly plate 23 cooperates with the sealing baffle 2 and the output plate 9.

[0023] The above scheme is adopted: the valve stem 14 is driven to rotate by the turbine worm in the turbine box 28. When the valve stem 14 rotates 90 degrees, the connecting rod 2 15 is driven to rotate. When the connecting rod 2 15 rotates, the connecting rod 5 21 is driven to rotate 90 degrees in an arc through the rotating rod 16. When the connecting rod 5 21 moves, the rotating rod 2 18 and the connecting rod 4 19 are driven to rotate 90 degrees through the rotating rod 3 20. When the connecting rod 5 21 rotates 90 degrees, the connecting plate 22 drives the butterfly plate 23 to fit with the sealing baffle 2. The cooperation of the rotating rod 16, the rotating rod 2, the connecting rod 4, the rotating rod 3, the connecting rod 5, the connecting plate 22 makes it easier to rotate the butterfly plate 23. When the butterfly plate 23 is separated from the sealing baffle 2, the sealing ring 5 is pulled back into the arc groove 3 by the tension of the spring 4. When the sealing ring 5 moves into the arc groove 3, the contact plate 11 is squeezed through the contact groove 6 to reset the contact plate 11, which can avoid friction between the butterfly plate 23 and the inner wall of the valve body 1 when the butterfly plate 23 is rotated, thereby reducing the sealing performance of the butterfly valve. When the valve stem 14 is in the turbine box 28, it is fixedly connected to the turbine in the turbine box 28. When the turntable 29 is rotated, the worm in the turbine box 28 can be rotated. When the worm rotates, the turbine is driven to rotate, and the valve stem 14 is driven to rotate through the rotation of the turbine. The sealing ring 5 is made of rubber and has elasticity. When the butterfly plate 23 is separated from the sealing baffle 2, the tension of the spring 4 will stretch the sealing ring 5, and then the sealing ring 5 will slide in the arc groove 3. When the sealing ring 5 is squeezed by the resistance plate 11, the sealing ring 5 will shrink inward and wrap the outer ring of the butterfly plate 23.

[0024] like Figures 1 to 9 As shown, a sealing tube 24 is installed on one side of the outer wall of the valve body 1, and the sealing tube 24 cooperates with the valve stem 14, an output pipe 26 is installed on the side of the sealing disk 25 away from the sealing tube 24, and the spring 4 passes through the output pipe 26, a mounting disk 27 is installed on the side of the output pipe 26 away from the sealing disk 25, a turbine box 28 is installed on the side of the mounting disk 27 away from the output pipe 26, the top of the spring 4 passes through the mounting disk 27 and is installed inside the turbine box 28, and flanges 30 are fixedly connected on both sides of the outer wall of the valve body 1, and the water pipe is connected through the flanges 30.

[0025] The above scheme is adopted: the valve stem 14 is driven to rotate by the worm gear in the turbine box 28, and the turntable 29 is rotated in the opposite direction to reverse the valve stem 14 by 90 degrees. The sealing tube 24 can prevent water from entering the output pipe 26, and the turbine in the turbine box 28 is fixedly connected to the valve stem 14.

[0026] The working principle and use process of the present invention: When the valve body 1 needs to be opened, the valve stem 14 is driven to rotate by the worm gear in the turbine box 28, and the turntable 29 is rotated in the opposite direction to make the valve stem 14 reverse 90 degrees. During the reversal of the valve stem 14, the connecting rod 21 and the connecting disk 22 are driven to rotate through the connecting rod 2 15 and the rotating rod 1 16 to make the butterfly plate 23 separate from the sealing baffle 2. When the butterfly plate 23 separates from the sealing baffle 2, the sealing ring 5 is pulled back into the arc groove 3 by the tension of the spring 4. When the contact plate 11 moves inward, the contact groove 6 will squeeze the contact plate 11 to reset the contact plate 11, which can avoid friction with the inner wall of the valve body 1 when the butterfly plate 23 is rotated, and reduce the sealing performance of the butterfly valve. When the contact plate 11 slides back, it drives the toggle plate 12 to reset. At this time, the toggle plate 12 will contact the toggle plate 10 to rotate the output rod 7. Through the rotation of the output rod 7, the connecting rod 1 8 is driven to rotate in the output plate 9, and the output plate 9 is pushed forward to reset the output plate 9; When the butterfly plate 23 is closed, the turntable 29 is rotated, and the valve stem 14 is driven to rotate through the turbine worm in the turbine box 28. When the valve stem 14 rotates ninety degrees, the connecting rod 2 15 is driven to rotate. When the connecting rod 2 15 rotates, the connecting rod 5 21 is driven to rotate ninety degrees in an arc through the rotating rod 1 16. When the connecting rod 5 21 moves, the rotating rod 2 18 and the connecting rod 4 19 are driven to rotate ninety degrees through the rotating rod 3 20. When the connecting rod 5 21 rotates ninety degrees, the connecting disk 22 drives the butterfly plate 23 to fit the sealing baffle 2. In the process of the butterfly plate 23 moving to fit the sealing baffle 2, the butterfly plate 23 will first contact the output plate 9, causing the output plate 9 to slide into the sealing baffle 2. When the output plate 9 slides into the sealing baffle 2, the connecting rod 1 8 It rotates in the output plate 9, and the output rod 7 is rotated through the connecting rod 18. When the output rod 7 rotates, it will drive the toggle plate 10 to move so that the toggle plate 10 contacts the toggle plate 2 12, and drive the contact plate 11 to move forward, so that the contact plate 11 slides forward into the contact groove 6, and then the contact plate 11 will continue to move forward to push the sealing ring 5 upward, and at the same time stretch the spring 4. When the butterfly plate 23 is completely fitted with the sealing baffle 2, the sealing ring 5 surrounds and fits the outer ring of the butterfly plate 23 through the sliding of the contact plate 11 in the contact groove 6 to seal it. The butterfly plate 23 is wrapped by squeezing the sealing ring 5 to avoid friction with the inner wall of the valve body 1 and the sealing ring 5 when the butterfly plate 23 is rotated, thereby increasing the service life of the butterfly plate 23 and the sealing ring 5.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft and hard double-sealed butterfly valve, comprising a valve body (1), characterized in that: A sealing baffle (2) is fixedly connected to one side of the inner cavity of the valve body (1); an arc-shaped groove (3) is provided on a side of the inner cavity of the valve body (1) close to the sealing baffle (2); a spring (4) is evenly distributed and mounted on the inner wall of the arc-shaped groove (3); a sealing ring (5) is fixedly connected to the side of the spring (4) away from the arc-shaped groove (3); the sealing ring (5) slides in the arc-shaped groove (3); a side of the sealing ring (5) close to the arc-shaped groove (3) is evenly distributed and is provided with abutment grooves (6); an output groove (13) is provided on the inner wall of one side of the sealing baffle (2); an output rod (7) is rotatably connected to the inner cavity of the output groove (13); the output rod One side of the outer wall of the output rod (7) is fixedly connected to two connecting rods (8); one side of the two connecting rods (8) away from the output rod (7) is rotatably connected to an output plate (9), and the output plate (9) penetrates the sealing baffle (2) and is slidably connected; the outer wall of the output rod (7) away from the connecting rod (8) is fixedly connected to a toggle plate (10); the bottom of the inner cavity of the output groove (13) penetrates the valve body (1) and is slidably connected to a contact plate (11), and the contact plate (11) cooperates with the contact groove (6); one side of the top of the contact plate (11) is fixedly connected to a toggle plate (12), and the toggle plate (12) cooperates with the toggle plate (10).

2. The soft and hard double-sealed butterfly valve according to claim 1 is characterized in that: A valve stem (14) passes through the middle of the valve body (1) and is rotatably connected thereto. Two connecting rods (15) are fixedly connected to one side of the outer wall of the valve stem (14). A rotating rod (16) is rotatably connected between the two connecting rods (15).

3. The soft and hard double-sealed butterfly valve according to claim 1 is characterized in that: A connecting rod three (17) is fixedly connected to one side of the middle part of the inner cavity of the valve body (1); an end of the connecting rod three (17) away from the valve body (1) passes through and is rotatably connected to a rotating rod two (18); the rotating rod two (18) passes through the connecting rod three (17) and is fixedly connected to connecting rods four (19) on both sides; a rotating rod three (20) passes through and is rotatably connected between the two connecting rods four (19); the rotating rod three (20) passes through one side of the two connecting rods four (19) and is fixedly connected to two connecting rods five (21); the middle parts of the two connecting rods five (21) pass through and are rotatably connected to the rotating rod one (16).

4. The soft and hard double-sealed butterfly valve according to claim 3 is characterized in that: One end of the two connecting rods five (21) away from the rotating rod three (20) is fixedly connected to a connecting disk (22), and one end of the connecting disk (22) away from the connecting rod five (21) is installed with a butterfly plate (23), and the butterfly plate (23) cooperates with the sealing baffle (2) and the output plate (9).

5. The soft and hard double-sealed butterfly valve according to claim 1 is characterized in that: A sealing tube (24) is installed on one side of the outer wall of the valve body (1), and the sealing tube (24) matches the valve stem (14).

6. The soft and hard double-sealed butterfly valve according to claim 5 is characterized in that: A sealing disk (25) is installed on the side of the sealing tube (24) away from the valve body (1), and the valve stem (14) passes through the sealing disk (25).

7. The soft and hard double-sealed butterfly valve according to claim 6 is characterized in that: An output pipe (26) is installed on a side of the sealing disc (25) away from the sealing pipe (24), and the valve stem (14) passes through the output pipe (26).

8. The soft and hard double-sealed butterfly valve according to claim 7 is characterized in that: A mounting plate (27) is mounted on a side of the output pipe (26) away from the sealing plate (25), a turbine box (28) is mounted on a side of the mounting plate (27) away from the output pipe (26), and a top of the valve stem (14) passes through the mounting plate (27) and is mounted inside the turbine box (28).

9. The soft and hard double-sealed butterfly valve according to claim 8, characterized in that: A rotating disk (29) is installed on one side of the top of the turbine box (28), and the rotating disk (29) cooperates with the spring (4).

10. The soft and hard double-sealed butterfly valve according to claim 1, characterized in that: Flanges (30) are fixedly connected to both sides of the outer wall of the valve body (1), and are connected to a water pipe via the flanges (30).

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