Soft sealing structure of pneumatic butterfly valve

Abstract

The utility model belongs to the technical field of butterfly valve sealing, and particularly relates to a pneumatic butterfly valve soft sealing structure which comprises a valve body, first valve body connecting plates are fixedly installed on the two sides of the valve body, first rubber rings are fixedly installed on the inner sides of the first valve body connecting plates, second valve body connecting plates are fixedly installed on the two sides of the valve body, and second rubber rings are fixedly installed on the inner sides of the second valve body connecting plates. Third rubber rings are fixedly mounted on the outer sides of the second valve body connecting plates, inflation modules are fixedly mounted on the two sides of the valve body, vent holes are fixedly formed in the side faces of the inflation modules, expansion ring mounting blocks are fixedly mounted on the outer side of the valve body, and clamping grooves are formed in the outer sides of first expansion rings. When the butterfly valve is used, the butterfly valve can be connected with an external pipeline through a vent hole, the first expansion ring and the second expansion ring can be inflated and expanded through cooperation of an inflation module and an expansion ring mounting block, and therefore when the butterfly valve is closed, a closed structure can be limited, and the sealing performance of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve sealing technology, specifically relating to a soft sealing structure for a pneumatic butterfly valve. Background Technology

[0002] A pneumatic butterfly valve is an important fluid control device, consisting of a pneumatic actuator and a butterfly valve. The pneumatic actuator uses compressed air as a power source, driving the valve stem to rotate, which in turn drives the disc-shaped butterfly plate to rotate inside the pipeline, thereby changing the flow cross-sectional area and flow rate inside the pipeline, and thus controlling the fluid.

[0003] When a butterfly valve is in use, its internal structure requires a sealing structure to achieve the blocking function. Most existing butterfly valve sealing devices use simple rubber sealing devices to improve the isolation function of the butterfly valve. However, after long-term use, the rubber sealing device may be damaged due to the erosion and corrosion of the internal material, thus affecting the isolation function of the butterfly valve. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a soft-seal structure for a pneumatic butterfly valve. This solves the problem that existing butterfly valve sealing devices often use simple rubber seals to improve the valve's isolation function, but these rubber seals may be damaged after prolonged use due to internal material erosion and corrosion, thus affecting the valve's isolation function.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a soft-seal structure for a pneumatic butterfly valve, comprising a valve body, a first valve body connecting plate fixedly installed on both sides of the valve body, a first rubber ring fixedly installed on the inner side of the first valve body connecting plate, a second valve body connecting plate fixedly installed on both sides of the valve body, a third rubber ring fixedly installed on the outer side of the second valve body connecting plate, an inflation module fixedly installed on both sides of the valve body, a vent hole fixedly installed on the side of the inflation module, an expansion ring mounting block fixedly installed on the outer side of the valve body, a groove provided on the outer side of the first expansion ring, a movable shaft movably installed inside the valve body, a movable shaft limiting ring provided on the outer side of one end of the movable shaft, a sealing plate fixedly installed on the outer side of the movable shaft, and a second rubber ring fixedly installed on the outer side of the sealing plate.

[0006] Preferably, a connecting pipe is fixedly installed on the top of the valve body, and a pneumatic actuator is fixedly installed on the top of the connecting pipe.

[0007] Preferably, there are two sets of the first valve body connecting plate and the first rubber ring.

[0008] Preferably, there are two sets of the second valve body connecting plate and the third rubber ring.

[0009] Preferably, one side of the expansion ring mounting block is fixedly connected to one side of the inflation module.

[0010] Preferably, a first expansion ring is fixedly installed on the inner side of the expansion ring mounting block, and a second expansion ring is fixedly installed on the inner side of the expansion ring mounting block.

[0011] Preferably, there are two sealing plates, and sealing plate support blocks are fixedly installed inside the two sealing plates.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The vent can be connected to an external pipe. Through the operation of the inflation module, it can work with the expansion ring mounting block to inflate the first and second expansion rings, thereby restricting the closed structure when the butterfly valve is closed, thus improving the sealing performance of the device. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a second three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a first sectional view of the present invention;

[0018] Figure 4 This is a second cross-sectional view of the present invention.

[0019] In the diagram: 1. Valve body; 2. Connecting pipe; 3. Pneumatic actuator; 4. First valve body connecting plate; 5. First rubber ring; 6. Second valve body connecting plate; 7. Inflation module; 8. Vent hole; 9. Expansion ring mounting block; 10. First expansion ring; 11. Slot; 12. Movable shaft; 13. Movable shaft limit ring; 14. Sealing plate; 15. Second expansion ring; 16. Sealing plate support block; 17. Second rubber ring; 18. Third rubber ring. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides the following technical solution: a soft-seal structure for a pneumatic butterfly valve, comprising a valve body 1, a first valve body connecting plate 4 fixedly installed on both sides of the valve body 1, a first rubber ring 5 fixedly installed on the inner side of the first valve body connecting plate 4, a second valve body connecting plate 6 fixedly installed on both sides of the valve body 1, a third rubber ring 18 fixedly installed on the outer side of the second valve body connecting plate 6, an inflation module 7 fixedly installed on both sides of the valve body 1, a vent hole 8 fixedly installed on the side of the inflation module 7, an expansion ring mounting block 9 fixedly installed on the outer side of the valve body 1, a slot 11 provided on the outer side of the first expansion ring 10, a movable shaft 12 movably installed inside the valve body 1, a movable shaft limiting ring 13 provided on the outer side of one end of the movable shaft 12, a sealing plate 14 fixedly installed on the outer side of the movable shaft 12, and a second rubber ring 17 fixedly installed on the outer side of the sealing plate 14.

[0022] In this embodiment: the vent hole 8 can be connected to an external pipe, and the inflation module 7 can work with the expansion ring mounting block 9 to inflate the first expansion ring 10 and the second expansion ring 15, thereby restricting the closed structure when the butterfly valve is closed and improving the sealing performance of the device.

[0023] In this embodiment, the first rubber ring 5 and the third rubber ring 18 can be used to snap the outer side of the pipe installed inside the device, thereby assisting other pipe installation accessories in further locking the pipe. The first rubber ring 5 and the third rubber ring 18 are made of rubber, which can improve the sealing effect of the device when locking the pipe.

[0024] In this embodiment: the two sealing plates 14 work together to achieve the sealing effect of the pipeline when closed. The sealing plate support block 16 can support the two sealing plates 14, and the second expansion ring 15 can be fitted between the two sealing plates 14 after inflation. The first expansion ring 10 can block the two sides of the sealing plate 14 after inflation. The two methods can prevent the sealing plate 14 from moving when closed, thereby improving the stability of the device.

[0025] The working principle and usage process of this utility model are as follows: After installation, the first rubber ring 5 and the third rubber ring 18 can be used to snap the outer side of the pipe installed inside the device, thereby assisting other pipe installation accessories in further locking the pipe connection. The first rubber ring 5 and the third rubber ring 18 are made of rubber, which improves the sealing effect of the device when locking the pipe. Then, it can be connected to an external pipe through the vent 8. The inflation module 7, in conjunction with the expansion ring mounting block 9, inflates the first expansion ring 10 and the second expansion ring 15. The first expansion ring 10, after being inflated, expands and enlarges, allowing it to fit between the two sealing plates 14. The second expansion ring 15, after being inflated, can block the sides of the sealing plate 14. These two methods prevent the sealing plate 14 from moving when closed, thereby improving the stability of the device. A second rubber ring 17 is fixedly installed inside the sealing plate 14. The second rubber ring 17, together with the first expansion ring 10 and the second expansion ring 15, can achieve the function of sealing the inside of the pipe. All electrical equipment in this device is powered by an external power source.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A soft-seal structure for a pneumatic butterfly valve, comprising a valve body (1), characterized in that: A first valve body connecting plate (4) is fixedly installed on both sides of the valve body (1). A first rubber ring (5) is fixedly installed on the inner side of the first valve body connecting plate (4). A second valve body connecting plate (6) is fixedly installed on both sides of the valve body (1). A third rubber ring (18) is fixedly installed on the outer side of the second valve body connecting plate (6). An inflation module (7) is fixedly installed on both sides of the valve body (1). A vent hole (8) is fixedly installed on the side of the inflation module (7). An expansion ring mounting block (9) is fixedly installed on the outer side of the valve body (1). The expansion ring mounting block (9) has a first expansion ring (10) fixedly installed on its inner side, and a second expansion ring (15) fixedly installed on its inner side. The first expansion ring (10) has a slot (11) on its outer side. The valve body (1) has a movable shaft (12) movably installed inside. One end of the movable shaft (12) has a movable shaft limiting ring (13) on its outer side. The movable shaft (12) has a sealing plate (14) fixedly installed on its outer side. The sealing plate (14) has a second rubber ring (17) fixedly installed on its outer side.

2. The soft-seal structure of a pneumatic butterfly valve according to claim 1, characterized in that: A connecting pipe (2) is fixedly installed on the top of the valve body (1), and a pneumatic actuator (3) is fixedly installed on the top of the connecting pipe (2).

3. The soft-seal structure of a pneumatic butterfly valve according to claim 1, characterized in that: The number of the first valve body connecting plate (4) and the first rubber ring (5) is two sets.

4. The soft-seal structure of a pneumatic butterfly valve according to claim 1, characterized in that: The number of the second valve body connecting plate (6) and the third rubber ring (18) is two sets.

5. The soft-seal structure of a pneumatic butterfly valve according to claim 1, characterized in that: One side of the expansion ring mounting block (9) is fixedly connected to one side of the inflation module (7).

6. The soft-seal structure of a pneumatic butterfly valve according to claim 1, characterized in that: The number of the closed plates (14) is two, and the two closed plates (14) are fixedly installed with closed plate support blocks (16).

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