Butterfly valve with good sealing performance

Abstract

The utility model provides a butterfly valve with good sealing performance, which is simple in structure and capable of preventing a water hammer, and comprises a valve body, a water inlet channel and a water outlet channel which are arranged on the valve body, a valve plate arranged between the water inlet channel and the water outlet channel, a valve rod for opening and closing the valve plate, and a baffle plate, a sliding channel is formed in the position, located on the water inlet channel face, of the valve plate, the sliding rod is arranged in the sliding channel in a sliding and penetrating mode, and a damping device for eliminating a water hammer is arranged in the sliding channel.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a butterfly valve with good sealing performance. Background Art

[0002] The butterfly valve, also called a flap valve, is a simple-structured regulating valve that can be used for the on-off control of the medium flow in a pipeline. The closing member of the butterfly valve is a disc-shaped butterfly plate, and its principle is that the butterfly plate rotates around the valve shaft to achieve the opening and closing of the butterfly valve. It is widely used in the pipeline transportation link.

[0003] A variety of butterfly valves with good sealing performance are disclosed on the Chinese Patent Network. Although they can meet the usage requirements, when in use, since water hammer will be generated when the butterfly valve closes, hitting the valve plate and damaging the valve plate, which affects the service life of the valve.

[0004] To solve this problem, the present utility model is thus produced. Summary of the Utility Model

[0005] Therefore, in view of the above problems, the present utility model provides a butterfly valve with good sealing performance, which has a simple structure and can prevent water hammer.

[0006] To solve the above technical problems, the solution adopted by the present utility model is: a butterfly valve with good sealing performance, including a valve body, a water inlet channel and a water outlet channel opened on the valve body, a valve plate arranged between the water inlet channel and the water outlet channel, a valve rod for opening and closing the valve plate, and a baffle. A sliding rod is arranged on the baffle, a sliding channel is opened on the valve plate on the surface of the water inlet channel, the sliding rod slidably penetrates through the sliding channel, and a damping device for eliminating water hammer is arranged in the sliding channel.

[0007] Further improvement is: the damping device includes a rotating shaft, the rotating shaft is symmetrically rotatably arranged in the sliding channel, a rubber roller is arranged on the rotating shaft, the sliding rod is arranged between the rubber rollers and resists against the rubber rollers, the other end of the rubber roller resists against the inner wall of the sliding channel, and a traction device for pulling the rotating shaft is further arranged in the sliding channel.

[0008] Further improvement is: the traction device includes a sliding block, the sliding block is slidably arranged on the inner wall of the sliding channel, a traction rope is wound around the rotating shaft, the other end of the traction rope is connected to the sliding block, and a telescopic reset member is arranged between the sliding block and the sliding channel.

[0009] Further improvement is: rubber blocks are arranged on the inner wall of the sliding channel, and the rubber rollers resist against the rubber blocks.

[0010] Further improvement is: the telescopic reset member is a telescopic spring, one end of the telescopic spring is connected to the sliding block, and the other end of the telescopic spring is connected to the inner wall of the sliding channel.

[0011] Further improvement is that an elastic layer is provided on the baffle, the elastic layer is convexly arranged, and elastic members are evenly distributed in the elastic layer.

[0012] Further improvement is that the elastic member is a support spring. One end of the support spring is connected to the elastic layer, and the other end of the support spring is connected to the baffle.

[0013] Further improvement is that a connecting spring is further included. One end of the connecting spring is connected to the baffle, and the other end of the connecting spring is connected to the valve plate.

[0014] By adopting the foregoing technical solutions, the beneficial effects of the present utility model are as follows:

[0015] The structure is simple and can prevent water hammer. The baffle can prevent the water hammer from directly hitting the valve plate, thereby increasing the service life of the valve plate, further increasing the service life of the valve, and being beneficial to the long-term use of the valve. Description of the Drawings

[0016] Figure 1 is a partially sectional structural schematic diagram of a butterfly valve with good sealing performance according to an embodiment of the present utility model.

[0017] Figure 2 is an enlarged structural schematic diagram at position A according to an embodiment of the present utility model. Detailed Embodiment

[0018] The present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0019] Referring to Figure 1-2 , what is disclosed in the embodiment of the present utility model is: a butterfly valve with good sealing performance, including a valve body 1, a water inlet channel 2 and a water outlet channel 3 opened on the valve body 1, a valve plate 5 arranged between the water inlet channel 2 and the water outlet channel 3, a valve rod 4 for opening and closing the valve plate 5, and a baffle 6. A sliding rod 7 is provided on the baffle 6. A sliding channel 11 is opened on the valve plate 5 on the side of the water inlet channel 2. The sliding rod 7 slidably penetrates through the sliding channel 11, and a damping device for eliminating water hammer is provided in the sliding channel 11.

[0020] Specifically, the damping device includes a rotating shaft 13 and a sliding block 20. The rotating shaft 13 is symmetrically and rotatably arranged in the sliding channel 11. A rubber roller 12 is provided on the rotating shaft 13. The sliding rod 7 is arranged between the rubber rollers 12 and resists against the rubber rollers 12. The other end of the rubber roller 12 resists against the inner wall of the sliding channel 11. The sliding block 20 is slidably arranged on the inner wall of the sliding channel 11. A traction rope 15 is wound around the rotating shaft 13. The other end of the traction rope 15 is connected to the sliding block 20. A telescopic spring 21 is provided between the sliding block 20 and the sliding channel 11. One end of the telescopic spring 21 is connected to the sliding block 20, and the other end of the telescopic spring 21 is connected to the inner wall of the sliding channel 11

[0021] In order to better hinder the rotation of the rubber roller 12 and thus better eliminate water hammer, a rubber block 14 is provided on the inner wall of the sliding channel 11, and the rubber roller 12 resists against the rubber block 14

[0022] In order to further block water hammer and protect the baffle 6, an elastic layer 9 is provided on the baffle 6. The elastic layer 9 is convexly arranged. Support springs 10 are evenly distributed in the elastic layer 9. One end of each support spring 10 is connected to the elastic layer 9, and the other end of each support spring 10 is connected to the baffle 6

[0023] In order to better block water hammer, a connecting spring 8 is further included. One end of the connecting spring 8 is connected to the baffle 6, and the other end of the connecting spring 8 is connected to the valve plate 5

[0024] Working principle:

[0025] When in use, after the butterfly valve is closed, water hammer enters the water inlet channel 2 and then impacts on the elastic layer 9. The elastic layer 9 deforms and compresses the support springs 10, thereby dissipating the energy of the water hammer. At the same time, the baffle 6 is pushed to slide. The baffle 6 drives the sliding rod 7 to slide, compressing the connecting spring 8. When the connecting spring 8 is compressed, the energy of the water hammer is dissipated. At the same time, the sliding rod 7 slides, pushing the rubber roller 12 to rotate. The rotation of the rubber roller 12 drives the rotating shaft 13 to rotate. When the rotating shaft 13 rotates, it winds the pull rope, driving the sliding block 20 to slide, thereby pulling the telescopic spring 21, and thus dissipating the energy of the water hammer. This can prevent the water hammer from directly hitting the valve plate 5 and damaging the valve plate 5. At the same time, it can also reduce the burden on the baffle 6, thereby improving the efficacy and service life of the baffle 6 in blocking water hammer

[0026] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve with good sealing performance, comprising a valve body, a water inlet channel and a water outlet channel opened on the valve body, a valve plate arranged between the water inlet channel and the water outlet channel, and a valve stem for opening and closing the valve plate, characterized in that: It also includes a baffle plate, a sliding rod is provided on the baffle plate, a sliding channel is opened on the water inlet channel surface of the valve plate, the sliding rod is slidably inserted into the sliding channel, and a damping device for eliminating water hammer is provided in the sliding channel.

2. A butterfly valve with good sealing performance according to claim 1, characterized in that: The damping device includes a rotating shaft, which is symmetrically rotated in the sliding channel. A rubber roller is provided on the rotating shaft. The sliding rod is provided between the rubber rollers and resists the rubber rollers. The other end of the rubber roller resists the inner wall of the sliding channel. A traction device for pulling the rotating shaft is also provided in the sliding channel.

3. A butterfly valve with good sealing performance according to claim 2, characterized in that: The traction device comprises a sliding block, which is slidably arranged on the inner wall of the sliding channel. A traction rope is wound around the rotating shaft, and the other end of the traction rope is connected to the sliding block. A telescopic reset member is arranged between the sliding block and the sliding channel.

4. A butterfly valve with good sealing performance according to claim 2, characterized in that: The inner wall of the sliding channel is provided with a rubber block, and the rubber roller resists the rubber block.

5. A butterfly valve with good sealing performance according to claim 3, characterized in that: The telescopic reset member is a telescopic spring, one end of which is connected to the sliding block, and the other end of which is connected to the inner wall of the sliding channel.

6. A butterfly valve with good sealing performance according to claim 1, characterized in that: The baffle is provided with an elastic layer, the elastic layer is arranged in a convex shape, and elastic members are evenly distributed in the elastic layer.

7. A butterfly valve with good sealing performance according to claim 6, characterized in that: The elastic member is a supporting spring, one end of which is connected to the elastic layer, and the other end of which is connected to the baffle.

8. A butterfly valve with good sealing performance according to claim 1, characterized in that: It also includes a connecting spring, one end of which is connected to the baffle, and the other end of which is connected to the valve plate.

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