A butterfly double-disc check valve

Abstract

This utility model discloses a butterfly-type double-disc check valve, including a valve body with mounting holes annularly spaced on the outer surface of the valve body. A mounting shaft is fixed circumferentially to the valve body, and two sets of check components are rotatably connected to the outer wall of the mounting shaft. Each check component includes a valve plate, an intermediate plate, and a mounting ring. The mounting ring is rotatably connected to the outer wall of the mounting shaft, and the valve plate is welded to the bottom of the mounting ring via the intermediate plate. The check components are reset using a spring-loaded mechanism. A sealing seat is fixed to the outer wall of the valve body, and a rotating column is rotatably connected to the inner surface of the sealing seat. The rotating column is marked with a marker. This utility model utilizes the meshing transmission of a toothed ring and teeth to drive the rotating column to rotate. Combined with a pointer and scale, it allows for direct judgment of whether the check components have reset to their initial position, thus ensuring complete closure of the check components. This effectively avoids safety hazards such as media backflow caused by incomplete closure of the check components, ensuring the safety of media transportation.

Description

Technical Field

[0001] This utility model relates to the field of double-disc check valve technology, and in particular to a butterfly double-disc check valve. Background Technology

[0002] In fluid transport systems, check valves are key equipment that play an important role in preventing backflow of the medium and are indispensable for ensuring the stable operation and safety of the system. There are various types of traditional check valves, the most common of which are swing check valves. Swing check valves open and close by rotating the valve disc around the valve seat axis. They are relatively flexible and have less water hammer. However, existing swing check valves also have some shortcomings. After the check assembly is closed, it is difficult to intuitively and accurately determine whether it has completely returned to the initial position. In actual operation, if the check assembly is not completely closed, the medium may leak, which will not only waste the medium, but may also cause safety accidents and threaten personnel and equipment. To address the aforementioned issues and improve the performance and reliability of check valves, this application designs a butterfly-type double-disc check valve, which allows for a direct visual assessment of whether the check assembly is fully closed, thereby ensuring the safety of media delivery. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a butterfly-type double-disc check valve.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A butterfly-type double-disc check valve includes a valve body with a mounting hole on its outer surface. A mounting shaft is fixed circumferentially to the valve body, and a check assembly is rotatably connected to the outer circumferential wall of the mounting shaft. The check assembly includes a valve plate, an intermediate plate, and a mounting ring. The mounting ring is rotatably connected to the outer circumferential wall of the mounting shaft. The valve plate is welded to the bottom of the mounting ring via the intermediate plate. The check assembly is reset using a spring-loaded component. A sealing seat is fixed to the outer circumferential wall of the valve body, and a rotating column is rotatably connected to the inner surface of the sealing seat. The rotating column is marked using a marking component, and teeth are integrally formed on the outer circumferential wall of the rotating column. A toothed ring is fixed to the outer circumferential wall of one set of mounting rings on the check assembly.

[0005] As a further embodiment of this utility model: the rebound member includes a mounting rod and a torsion spring, the mounting rod is fixed to the outer wall of the valve body, and the helical spring body of the torsion spring is sleeved on the outer wall of the mounting shaft.

[0006] As a further embodiment of this utility model: the hook of the torsion spring and the mounting rod are connected to each other, and the support leg of the torsion spring abuts against the surface of the valve plate.

[0007] As a further embodiment of this utility model: the marking element includes a pointer and a scale plate, the scale plate is fixed to the outer circumference of the valve body, and the pointer is fixed to one end of the rotating column.

[0008] As a further improvement of this utility model: the inner wall of the valve body is integrally formed with a support plate, and a rubber pad is glued to the top of the support plate.

[0009] As a further improvement of this utility model: a base plate is welded to the bottom of the support plate, and a second adhesive pad is glued to the top of the base plate.

[0010] As a further improvement of this utility model, a limiting gasket is fitted onto the outer circumferential wall of the mounting shaft.

[0011] As a further improvement of this utility model, the two ends of the limiting gasket are respectively disposed between the inner wall of the valve body and the end of the mounting ring.

[0012] Compared with the prior art, this utility model provides a butterfly double-disc check valve, which has the following beneficial effects: 1. The meshing transmission between the toothed ring and the teeth drives the rotating column to rotate. With the help of the pointer and scale plate, it is possible to intuitively determine whether the check component has been reset to the initial position, thereby ensuring that the check component is fully closed. This effectively avoids safety hazards such as backflow of the medium caused by the check component not being fully closed, and ensures the safety of medium transportation.

[0013] 2. A rubber sealing ring is installed in the preset groove of the sealing seat to seal the space between the sealing seat and the rotating column. When the rotating column is inserted, it is compressed and tightly fits the surface. The elastic deformation of the rubber fills the gap and effectively prevents the leakage of the medium.

[0014] 3. The first adhesive pad bonded to the top of the inner wall support plate of the valve body and the second adhesive pad bonded to the bottom plate can seal the bottom of the two valve plates and the joint between the two valve plates. The multiple sealing design ensures that the medium will not overflow during transportation, thus ensuring the stable operation of the pipeline system.

[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a butterfly double-disc check valve proposed in this utility model. Figure 2 This is a schematic diagram of the bottom structure of a butterfly double-disc check valve proposed in this utility model. Figure 3 This is an exploded structural diagram of a butterfly double-disc check valve proposed in this utility model. Figure 4This is a schematic diagram of a partially exploded structure of a butterfly double-disc check valve proposed in this utility model. Figure 5 This is an exploded structural diagram of the check assembly of a butterfly double-disc check valve proposed in this utility model. Figure 6 This is an enlarged view of point A.

[0017] In the diagram: 1. Valve body; 2. Mounting rod; 3. Valve plate; 4. Mounting hole; 5. Base plate; 6. Support plate; 7. Intermediate plate; 8. Limiting gasket; 9. Tooth; 10. Torsion spring; 11. Rotating column; 12. Mounting shaft; 13. Rubber gasket one; 14. Rubber gasket two; 15. Scale plate; 16. Mounting ring; 17. Sealing seat; 18. Pointer; 19. Toothed ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] A butterfly-type double-disc check valve, such as Figures 1 to 6 As shown, the device includes a valve body 1. The outer surface of the valve body 1 has mounting holes 4 arranged in an annular pattern at equal intervals. A mounting shaft 12 is fixed in the circumferential direction of the valve body 1. Two sets of check assemblies are rotatably connected to the outer circumferential wall of the mounting shaft 12. The check assembly includes a valve plate 3, an intermediate plate 7, and a mounting ring 16. The mounting ring 16 is rotatably connected to the outer circumferential wall of the mounting shaft 12. The valve plate 3 is welded to the bottom of the mounting ring 16 through the intermediate plate 7. The check assembly is reset by a spring-loaded component. A sealing seat 17 is fixed in the outer circumferential wall of the valve body 1. A rotating column 11 is rotatably connected to the inner surface of the sealing seat 17. The rotating column 11 is marked by a marking component. The outer circumferential wall of the rotating column 11 is integrally formed with teeth 9. One set of mounting rings 16 on the check assembly has a toothed ring 19 fixed in the outer circumferential wall that meshes with the teeth 9. When in use, first connect the mounting hole 4 on the valve body 1 with the flange docking hole on the corresponding pipe (not shown), and then use bolts, nuts and other fasteners to fix the valve body 1 and the corresponding pipe in place. In the initial state, when there is no medium passing through the pipeline, the rebound force of the spring element causes the two valve plates 3 to come together, that is, the two valve plates 3 are in a closed state at this time. When there is medium passing through the pipeline, the medium will exert pressure on the surface of the two valve plates 3 during the transportation process. When the pressure overcomes the spring force of the spring element, the spring element deforms, causing the check assembly to rotate along the mounting shaft 12. That is, the valve plates 3 generate a gap relative to the valve body 1 during synchronous rotation, allowing the medium to be transported through the gap. When the medium is transported, the check assembly closes again under the action of the spring force of the spring element. The sealing seat 17 and the rotating column 11 can be sealed by a rubber sealing ring. The seal is achieved by filling the gap with the elastic deformation of the rubber, such as an O-ring. It is installed in the preset groove of the sealing seat 17. When the rotating column 11 is inserted, it is compressed and fits the surface to prevent leakage. O-ring sealing is a mature existing technology and will not be described in detail here.

[0020] As the check valve assembly rotates along the mounting shaft 12, the mounting ring 16 and the toothed ring 19 rotate synchronously. Since the toothed ring 19 and the teeth 9 mesh with each other, the toothed ring 19 will also drive the teeth 9 and the rotating column 11 to rotate during its rotation. Since the rotating column 11 is marked with a marker, after the check valve assembly is closed, the marker can be used to observe whether the check valve assembly has returned to its initial position, thereby determining whether the check valve assembly is completely closed, thus ensuring the safety of the medium transportation and preventing backflow.

[0021] The rebound component includes a mounting rod 2 and a torsion spring 10. The mounting rod 2 is fixed to the outer wall of the valve body 1. The spiral spring body of the torsion spring 10 is sleeved on the outer circumference of the mounting shaft 12. The hook formed integrally on the torsion spring 10 and the mounting rod 2 are connected to each other. The support foot of the torsion spring 10 abuts against the surface of the valve plate 3. The torsion spring 10 can be installed by setting the mounting rod 2 and the mounting shaft 12. By having the support leg of the torsion spring 10 abut against the surface of the valve plate 3, when the valve plate 3 is subjected to the pressure of the medium, the support leg of the torsion spring 10 is squeezed. The support leg of the torsion spring 10 stores elastic potential energy due to deformation. When the medium is delivered, the support leg of the torsion spring 10 converts the stored elastic potential energy into kinetic energy for the valve plate 3, thereby causing the valve plate 3 to spring back and reset.

[0022] The marking element includes a pointer 18 and a scale plate 15. The scale plate 15 is fixed to the outer circumference of the valve body 1, and the pointer 18 is fixed to one end of the rotating column 11. In the initial state, when there is no medium flowing through the pipeline, the pointer 18 indicates the initial value on the scale plate 15. When the medium is delivered, the check component closes under the rebound force of the spring element. At this time, the pointer 18 indicates the reset value on the scale plate 15. By comparing the reset value with the initial value, if the error between the two is within the set range, the check component is reset; otherwise, the check component has not completed the reset. This method can quickly determine whether the check component has been reset.

[0023] The valve body 1 has an integrally formed support plate 6 on its inner circumference, and a rubber pad 13 is bonded to the top of the support plate 6. A bottom plate 5 is welded to the bottom of the support plate 6, and a second rubber pad 14 is bonded to the top of the bottom plate 5. By setting rubber gasket 13 and rubber gasket 24, the joints between the two valve plates 3 and the valve body 1, as well as between the two valve plates 3, can be sealed to prevent the medium from flowing back and overflowing. The radius of the valve plate 3 is smaller than the radius of the inner surface of the valve body 1, ensuring that the valve plate 3 and the valve body 1 do not get stuck when the check valve assembly rotates.

[0024] The mounting shaft 12 is fitted with a limiting gasket 8 on its outer circumference, and the two ends of the limiting gasket 8 are respectively located between the inner circumference of the valve body 1 and the end of the mounting ring 16. By setting a limiting gasket 8, the gap between the mounting ring 16 and the valve body 1 can be filled, thereby limiting the check assembly relative to the mounting shaft 12 and preventing the check assembly from moving left or right relative to the mounting shaft 12.

[0025] Working principle: First, the mounting holes 4 evenly distributed in annular pattern on the valve body 1 are precisely aligned and fixed with the mating holes on the corresponding pipe flange. In the initial state, when there is no medium passing through the pipeline, the spring-loaded component uses its own rebound force to make the two valve plates 3 close together and be in a tightly closed state. When there is medium flowing inside the pipeline, the medium exerts pressure on the surface of the two valve plates 3. Once this pressure overcomes the spring force of the spring-loaded component, the spring-loaded component will deform, thereby driving the check assembly to rotate along the mounting shaft 12. During the synchronous rotation, the valve plates 3 create a gap with the valve body 1, and the medium can be transported through this gap. When the medium is transported, the spring-loaded component, under its rebound force, causes the check assembly to close again. During the rotation of the check assembly along the mounting shaft 12, the mounting ring 16 and the toothed ring 19 rotate synchronously. Since the toothed ring 19 and the teeth 9 mesh with each other, when the toothed ring 19 rotates, it will drive the teeth 9 and the rotating column 11 to rotate together. The rotating column 11 is equipped with a marker. By observing the marker, it can be accurately determined whether the check assembly has returned to the initial position.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A butterfly-type double-disc check valve, comprising a valve body (1), characterized in that, The valve body (1) has an installation hole (4) on its outer surface. The valve body (1) has a mounting shaft (12) fixed in the circumferential direction. The mounting shaft (12) is rotatably connected to the outer circumferential wall of the mounting shaft (12). The check assembly includes a valve plate (3), an intermediate plate (7) and a mounting ring (16). The mounting ring (16) is rotatably connected to the outer circumferential wall of the mounting shaft (12). The valve plate (3) is welded to the bottom of the mounting ring (16) through the intermediate plate (7). The check assembly is reset by a spring-loaded component. The valve body (1) has a sealing seat (17) fixed in the circumferential wall. The inner surface of the sealing seat (17) is rotatably connected to a rotating column (11). The rotating column (11) is marked by a marking component. The outer circumferential wall of the rotating column (11) is integrally formed with teeth (9). One set of mounting rings (16) on the check assembly has a toothed ring (19) fixed in the circumferential wall.

2. The butterfly double-disc check valve according to claim 1, characterized in that, The spring-loaded component includes a mounting rod (2) and a torsion spring (10). The mounting rod (2) is fixed to the outer wall of the valve body (1), and the spiral spring body of the torsion spring (10) is sleeved on the outer circumference of the mounting shaft (12).

3. A butterfly double-disc check valve according to claim 2, characterized in that, The hook of the torsion spring (10) and the mounting rod (2) are connected to each other, and the support leg of the torsion spring (10) abuts against the surface of the valve plate (3).

4. A butterfly double-disc check valve according to claim 1, characterized in that, The marking element includes a pointer (18) and a scale plate (15). The scale plate (15) is fixed to the outer circumference of the valve body (1), and the pointer (18) is fixed to one end of the rotating column (11).

5. A butterfly-type double-disc check valve according to claim 4, characterized in that, The valve body (1) has an integrally formed support plate (6) on its inner circumference, and a rubber pad (13) is bonded to the top of the support plate (6).

6. A butterfly double-disc check valve according to claim 5, characterized in that, The bottom of the support plate (6) is welded with a base plate (5), and the top of the base plate (5) is glued with a second adhesive pad (14).

7. A butterfly double-disc check valve according to claim 6, characterized in that, The mounting shaft (12) is fitted with a limiting gasket (8) on its outer circumference.

8. A butterfly double-disc check valve according to claim 7, characterized in that, The two ends of the limiting gasket (8) are respectively located between the inner circumference of the valve body (1) and the end of the mounting ring (16).

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