Butterfly valve with dustproof function

Abstract

The utility model belongs to the technical field of dustproof butterfly valves, and particularly relates to a butterfly valve with a dustproof function, which comprises a butterfly valve, an air guide pipe is detachably mounted on the inner side surface of one end of the butterfly valve, and a dust filtering unit is detachably mounted on the inner side wall surface of the butterfly valve. The dust filtering unit comprises a conical filtering cylinder, a filtering net plate and a dust storage box, and an air source transmission cleaning unit is detachably installed on the inner side wall face of the butterfly valve and comprises arc-shaped air guiding blades, hollow soft strips and brushes. When an air source flows in the air guide pipe, the air source is matched with the conical dust storage barrel to be in contact with air, one end of the conical dust storage barrel is gradually shrunk, the flowing space of the air is reduced, the follow-up impact force of the air source is not changed, and meanwhile the air flow speed is increased. The flowing speed of an air source on the inner side wall surfaces of the conical dust storage barrel and the conical filter barrel can be increased, and then the air source passes through the inclined surface of the filter screen plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of dustproof butterfly valves, in particular to a butterfly valve with a dustproof function. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve whose closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. The dustproof function means that the product can effectively prevent dust, dirt and other particulate matter in the air from entering the interior of the product, thereby ensuring the effectiveness and reliability of the product in long-term use.

[0003] A Chinese patent with publication number CN219242707U discloses a butterfly valve with dustproof function, including a valve body, a butterfly plate is arranged in the valve body, a valve stem is fixedly connected to the middle of the butterfly plate, the upper and lower sides of the valve stem are rotatably connected to the valve body, two inlet pipes are arranged on one side of the valve body, a filter is connected to the middle flange of the two inlet pipes, a filter screen is detachably arranged inside the filter, a valve one is arranged on one side of the two inlet pipes, a valve two is arranged on the other side of the two inlet pipes, and the filter is arranged between the valve one and the valve two. In this structure, fluid transportation can be realized without stopping, so that the filter screen can be cleaned and maintained.

[0004] In the current prior art, in order to prevent dust in the fluid from accumulating inside the butterfly valve, thereby affecting the service life of the butterfly valve, a filter dust-proof structure is added to the existing butterfly valve to filter the dust in the fluid, so that the filter can filter the dust inside the air source. However, the existing filter is relatively small and there is no device on the surface for cleaning. It will soon be filled with dust, resulting in a relatively slow filtering efficiency of the air source. The internal filter needs to be cleaned regularly, and the equipment needs to be stopped for each cleaning. Since the periodic time is relatively short and the number of times is relatively large, the gas flow is affected, and some internal filter components need to be disassembled, maintained and replaced later. At this time, the entire fluid delivery pipeline is stopped, and the fluid stops being transported for maintenance, which greatly delays production. In order to solve the above-mentioned problems, a butterfly valve with a dust-proof function is proposed.

[0005] To this end, the utility model provides a butterfly valve with a dustproof function. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A butterfly valve with a dust-proof function described in the present utility model includes a butterfly valve. A gas guide pipe is detachably installed on the inner surface of one end of the butterfly valve. A dust filtering unit is detachably installed on the inner wall surface of the butterfly valve. The dust filtering unit includes a conical filter cylinder, a filter screen plate, and a dust collection box. An air source drive cleaning unit is detachably installed on the inner wall surface of the butterfly valve. The air source drive cleaning unit includes an arc-shaped air guide vane, a hollow soft strip, and a brush.

[0008] Preferably, the outer surface of the conical filter cylinder is detachably installed on the inner wall surface of the gas guide pipe. Air guide grooves are provided on the inner wall surface of the conical filter cylinder. When the dust on the surface of the filter screen plate is cleaned off and there are no impurities isolating the air source, the air source will pass through the filter screen plate and the air guide grooves, thereby discharging and guiding the air. A snap groove is provided on the left inner wall surface of the conical filter cylinder.

[0009] Preferably, a conical dust collection cylinder is movably sleeved on the inner surface of the conical filter cylinder. The dust collection box is arranged on the right inner wall surface of the conical dust collection cylinder. The filter screen plate is fixedly connected to the inner surface of the conical dust collection cylinder. A snap connection buckle is fixedly connected to the left surface of the conical dust collection cylinder and movably sleeved on the inner wall surface of the snap groove.

[0010] Preferably, a snap connection positioning strip that is detachably installed on the inner surface of the conical filter cylinder and is movably attached to the left surface of the conical dust collection cylinder is provided. When the air source flows inside the gas guide pipe, it contacts the air in cooperation with the conical dust collection cylinder. One end of the conical dust collection cylinder gradually contracts, reducing the air flow space. While the subsequent air source impact force remains unchanged, it will accelerate the air flow speed on the inner wall surfaces of the conical dust collection cylinder and the conical filter cylinder. Then, through the inclined surface of the filter screen plate, the air flow speed on its surface will be greater than the air flow speed inside the gas guide pipe. At the same time, the dust cleaned off the surface of the conical dust collection cylinder will also be quickly pushed towards one end, causing the dust to gradually accumulate in the deep part of the conical dust collection cylinder. The dust on the surface of the filter screen plate at the entrance of the conical dust collection cylinder will be relatively less, so that there is always an air flow space on the surface of the filter screen plate, and it will not be blocked due to dust accumulation. A support limiting collar is detachably installed on the inner wall surface of the gas guide pipe. The number of the support limiting collars is multiple. The inner surface of the multiple support limiting collars movably sleeves an activity rod. At the same time, in cooperation with the curvature on the outer surface of the arc-shaped air guide vane, when the air source is pushed, the arc-shaped air guide vane will rotate towards the convex surface, sequentially driving the activity rod on one side surface of the arc-shaped air guide vane to rotate on the outer surface of the support limiting collar.

[0011] Preferably, one outer surface of the arc-shaped air guide vane is fixedly connected to the outer surface of the left movable rod. When gas flows inside the air guide pipe, the arc-shaped air guide vane on the outer surface of the movable rod will contact the gas flowing inside the air guide pipe. While contacting the air source, using the pushing force generated by the air source, one end of the movable rod passes through the inside of the conical filter cylinder, and a support limiting rod is fixedly connected to the outer surface of the left movable rod.

[0012] Preferably, one end of the support limiting rod is movably lapped on the outer surface of the clamping and positioning strip, and an elastic support leg is fixedly connected to the outer surface of the left movable rod.

[0013] Preferably, one end of the elastic support leg is fixedly connected to the outer surface of the hollow soft strip, and the outer surface of the brush is fixedly connected to the outer surface of the hollow soft strip. While the movable rod rotates, it will also drive the hollow soft strip at one end of the elastic support leg to slide on the inner surface of the conical filter cylinder. The brush on the outer surface of the hollow soft strip slides on the surface of the filter mesh plate, and the outer surface of the brush is movably attached to the outer surface of the filter mesh plate. A wind guide vane is fixedly connected to the outer surface of the right movable rod.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. For the butterfly valve with a dust-proof function of the present utility model, when the air source flows inside the air guide pipe, it contacts the air in cooperation with the conical dust collection cylinder. One end of the conical dust collection cylinder gradually contracts, reducing the air flow space. While the subsequent air source impact force remains unchanged, it will accelerate the air flow speed on the inner side wall surfaces of the conical dust collection cylinder and the conical filter cylinder. Then, through the inclined surface of the filter mesh plate, the air flow speed on its surface will be greater than the air flow speed inside the air guide pipe. At the same time, the dust cleaned from the surface of the conical dust collection cylinder will also be quickly pushed towards one end, causing the dust to gradually accumulate deep in the conical dust collection cylinder, and there will be less dust on the surface of the filter mesh plate at the entrance of the conical dust collection cylinder, so that there is always an air flow space on the surface of the filter mesh plate and it will not be blocked due to dust accumulation.

[0016] 2. For a butterfly valve with a dust-proof function according to the present utility model, when the brush slides, the dust on the surface of the filter screen plate is cleaned off. Due to the conical shape of the conical dust collection cylinder, the cleaned dust will flow at one end and is centrally collected by the dust collection box. When the dust on the surface of the filter screen plate is cleaned off and there are no impurities blocking the air source, the air source will pass through the filter screen plate and the air guide groove, thereby discharging and guiding the air. When disassembling the filtering device later, only need to push the movable rod to one end, peel the conical dust collection cylinder from the inner surface of the conical filter cylinder, wash the filter screen plate, and snap the snap fastener into the inner surface of the snap groove to fix it;

[0017] 3. For a butterfly valve with a dust-proof function according to the present utility model, when gas flows inside the air duct, the arc-shaped air guide vanes on the outer surface of the movable rod will come into contact with the gas flowing inside the air duct. When coming into contact with the air source, using the pushing force generated by the air source and cooperating with the curvature on the outer surface of the arc-shaped air guide vanes, when the air source is pushing, the arc-shaped air guide vanes will rotate towards the convex surface, sequentially driving the movable rod on one side surface of the arc-shaped air guide vanes to rotate on the outer surface of the support limiting collar. When the movable rod rotates, it will also drive the hollow soft strip at one end of the elastic support leg to slide on the inner surface of the conical filter cylinder, and use the brush on the outer surface of the hollow soft strip to slide on the surface of the filter screen plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings.

[0019] Figure 1 is the perspective view of the present utility model;

[0020] Figure 2 is the sectional perspective structural schematic diagram of the air duct in the present utility model;

[0021] Figure 3 is the exploded sectional perspective structural schematic diagram of the conical filter cylinder in the present utility model;

[0022] Figure 4 is the sectional perspective structural schematic diagram of the conical filter cylinder in the present utility model;

[0023] Figure 5 is the perspective structural schematic diagram of the movable rod in the present utility model.

[0024] In the figure: 11, butterfly valve; 12, air duct; 13, support limiting collar; 14, movable rod; 15, arc-shaped air guide vane; 16, support limiting rod;

[0025] 17. Conical filter cartridge; a1. Snap groove; a2. Air guide groove; a3. Conical dust collection cylinder; a4. Dust collection box; a5. Filter screen plate; a6. Snap connection positioning strip; a7. Snap connection buckle;

[0026] 18. Elastic support leg; 19. Hollow soft strip; 110. Brush; 111. Air guide vane. Specific implementation mode

[0027] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation modes.

[0028] As Figures 1 to 5 shown, it includes a butterfly valve 11. A gas guide pipe 12 is detachably installed on the inner surface of one end of the butterfly valve 11. A dust filtering unit is detachably installed on the inner wall surface of the butterfly valve 11. The dust filtering unit includes a conical filter cartridge 17, a filter screen plate a5 and a dust collection box a4. An air source drive cleaning unit is detachably installed on the inner wall surface of the butterfly valve 11. The air source drive cleaning unit includes an arc-shaped air guide vane 15, a hollow soft strip 19 and a brush 110. One end of the outer surface of the arc-shaped air guide vane 15 is fixedly connected to the outer surface of the left movable rod 14. When gas flows inside the gas guide pipe 12, the arc-shaped air guide vane 15 on the outer surface of the movable rod 14 will come into contact with the gas flowing inside the gas guide pipe 12. While coming into contact with the air source, using the pushing force generated by the air source, one end of the movable rod 14 passes through the inside of the conical filter cartridge 17. A support limiting rod 16 is fixedly connected to the outer surface of the left movable rod 14, and one end of the support limiting rod 16 is movably lapped on the outer surface of the snap connection positioning strip a6. An elastic support leg 18 is fixedly connected to the outer surface of the left movable rod 14, and one end of the elastic support leg 18 is fixedly connected to the outer surface of the hollow soft strip 19. The outer surface of the brush 110 is fixedly connected to the outer surface of the hollow soft strip 19. While the movable rod 14 rotates, it will also drive the hollow soft strip 19 at one end of the elastic support leg 18 to slide on the inner surface of the conical filter cartridge 17. The brush 110 on the outer surface of the hollow soft strip 19 slides on the surface of the filter screen plate a5, and the outer surface of the brush 110 is movably attached to the outer surface of the filter screen plate a5. A wind guide vane 111 is fixedly connected to the outer surface of the right movable rod 14. A support limiting collar 13 is detachably installed on the inner wall surface of the gas guide pipe 12. The number of the support limiting collars 13 is set to be multiple. The inner surface of the multiple support limiting collars 13 movably sleeved on the outer surface of the movable rod 14. At the same time, in cooperation with the radian on the outer surface of the arc-shaped air guide vane 15, when the air source is pushing, the arc-shaped air guide vane 15 will rotate towards the convex surface, and sequentially drive the movable rod 14 on one side surface of the arc-shaped air guide vane 15 to rotate on the outer surface of the support limiting collar 13.

[0029] As Figures 1 to 5 shown, the outer surface of the conical filter cartridge 17 is detachably mounted on the inner wall surface of the air duct 12. An air guiding groove a2 is provided on the inner wall surface of the conical filter cartridge 17. When the dust on the surface of the filter mesh plate a5 is cleaned off and there are no impurities isolating the air source, the air source will pass through the filter mesh plate a5 and the air guiding groove a2, thereby discharging and guiding the air. A snap groove a1 is provided on the left inner wall surface of the conical filter cartridge 17. When disassembling the filtering device later, only need to push the movable rod 14 towards one end to peel the conical dust collection cylinder a3 from the inner surface of the conical filter cartridge 17, wash the filter mesh plate a5, and snap the snap buckle a7 onto the inner surface of the snap groove a1 to fix it. A conical dust collection cylinder a3 is movably sleeved on the inner surface of the conical filter cartridge 17. The dust collection box a4 is arranged on the right inner wall surface of the conical dust collection cylinder a3. The filter mesh plate a5 is fixedly connected to the inner surface of the conical dust collection cylinder a3. When the brush 110 slides, the dust on the surface of the filter mesh plate a5 is cleaned off. By using the conical shape of the conical dust collection cylinder a3, the cleaned dust will flow towards one end, and cooperate with the dust collection box a4 to centrally collect it. A snap buckle a7 fixedly connected to the left surface of the conical dust collection cylinder a3 is movably sleeved on the inner wall surface of the snap groove a1. A snap positioning strip a6 that is detachably mounted on the inner surface of the conical filter cartridge 17 and fits against the left surface of the conical dust collection cylinder a3 is provided. When the air source flows inside the air duct 12, it contacts the air through the conical dust collection cylinder a3. One end of the conical dust collection cylinder a3 gradually contracts, reducing the air flow space. While the subsequent air source impact force remains unchanged, it will accelerate the air flow speed of the air source on the inner wall surfaces of the conical dust collection cylinder a3 and the conical filter cartridge 17. Then, through the inclined surface of the filter mesh plate a5, the air flow speed on its surface will be greater than the air flow speed inside the air duct 12. At the same time, the dust cleaned off the surface of the conical dust collection cylinder a3 will also be quickly pushed towards one end, causing the dust to gradually accumulate deep in the conical dust collection cylinder a3. The dust on the surface of the filter mesh plate a5 at the entrance of the conical dust collection cylinder a3 will be relatively less, so that there is always an air flow space on the surface of the filter mesh plate a5, and it will not be blocked due to dust accumulation.

[0030] Working principle: When gas flows inside the air duct 12, the arc-shaped air guide vanes 15 on the outer surface of the movable rod 14 will come into contact with the gas flowing inside the air duct 12. When coming into contact with the air source, using the pushing force generated by the air source and in conjunction with the curvature of the outer surface of the arc-shaped air guide vanes 15, while the air source is pushing, the arc-shaped air guide vanes 15 will rotate towards the convex surface. In turn, it drives the movable rod 14 on one side surface of the arc-shaped air guide vanes 15 to rotate on the outer surface of the support limit collar 13. While the movable rod 14 is rotating, it will also drive the hollow soft strip 19 at one end of the elastic support leg 18 to slide on the inner surface of the conical filter cylinder 17, and use the brush 110 on the outer surface of the hollow soft strip 19 to slide on the surface of the filter screen plate a5;

[0031] When the brush 110 is sliding, it will clean the dust on the surface of the filter screen plate a5. Using the conical shape of the conical dust collection cylinder a3, the cleaned dust will flow towards one end and be centrally collected by the dust collection box a4. When the dust on the surface of the filter screen plate a5 is cleaned off and there are no impurities blocking the air source, the air source will pass through the filter screen plate a5 and the air guide groove a2, thereby discharging and guiding the air. When disassembling the filtering device later, only need to push the movable rod 14 towards one end, peel the conical dust collection cylinder a3 from the inner surface of the conical filter cylinder 17, wash the filter screen plate a5, and snap the snap buckle a7 into the inner surface of the buckle groove a1 to fix it;

[0032] When the air source flows inside the air duct 12, it comes into contact with the air in cooperation with the conical dust collection cylinder a3. One end of the conical dust collection cylinder a3 gradually contracts, reducing the air flow space. While the subsequent impact force of the air source remains unchanged, it will accelerate the flow rate of the air source on the inner wall surfaces of the conical dust collection cylinder a3 and the conical filter cylinder 17. Then, through the inclined surface of the filter screen plate a5, the air flow rate on its surface will be greater than the air flow rate inside the air duct 12. At the same time, the dust cleaned from the surface of the conical dust collection cylinder a3 will also be quickly pushed towards one end, causing the dust to gradually accumulate deep in the conical dust collection cylinder a3. The dust on the surface of the filter screen plate a5 at the entrance of the conical dust collection cylinder a3 will be relatively less, ensuring that there is always an air flow space on the surface of the filter screen plate a5, preventing blockage due to dust accumulation, reducing the frequency of cleaning the filter each time, increasing the time interval between each cleaning, reducing labor and material resources, reducing the friction between the butterfly valve and the water pipe, and reducing wear.

[0033] The foregoing 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 the specification is only to illustrate the principle 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 a dust-proof function, characterized in that: It includes a butterfly valve (11), and an air duct (12) is detachably installed on the inner surface of one end of the butterfly valve (11). A dust filtering unit is detachably installed on the inner wall surface of the butterfly valve (11). The dust filtering unit includes a conical filter cylinder (17), a filter mesh plate (a5), and a dust collection box (a4). An air source drive cleaning unit is detachably installed on the inner wall surface of the butterfly valve (11). The air source drive cleaning unit includes an arc-shaped air guide vane (15), a hollow flexible strip (19), and a brush (110).

2. The butterfly valve with a dust-proof function according to claim 1, characterized in that: The outer surface of the conical filter cylinder (17) is detachably installed on the inner wall surface of the air duct (12). An air guide groove (a2) is formed on the inner wall surface of the conical filter cylinder (17). A snap groove (a1) is formed on the left inner wall surface of the conical filter cylinder (17).

3. A butterfly valve with a dust-proof function according to claim 2, characterized in that: A conical dust collection cylinder (a3) is movably sleeved on the inner surface of the conical filter cylinder (17). The dust collection box (a4) is arranged on the right inner wall surface of the conical dust collection cylinder (a3). The filter mesh plate (a5) is fixedly connected to the inner surface of the conical dust collection cylinder (a3). A snap button (a7) fixedly connected to the left side surface of the conical dust collection cylinder (a3) is movably sleeved on the inner wall surface of the snap groove (a1).

4. A butterfly valve with a dust-proof function according to claim 1, characterized in that: A snap positioning strip (a6) that is detachably installed on the inner surface of the conical filter cylinder (17) and is movably attached to the left side surface of the conical dust collection cylinder (a3). A support limit collar (13) is detachably installed on the inner wall surface of the air duct (12). The number of the support limit collars (13) is multiple. An activity rod (14) is movably sleeved on the inner surface of the multiple support limit collars (13).

5. The butterfly valve with a dust-proof function according to claim 4, characterized in that: The outer surface of one end of the arc-shaped air guide vane (15) is fixedly connected to the outer surface of the left activity rod (14). One end of the activity rod (14) passes through the inside of the conical filter cylinder (17). A support limit rod (16) is fixedly connected to the outer surface of the left activity rod (14).

6. The butterfly valve with a dust-proof function according to claim 5, characterized in that: And one end of the support limit rod (16) is movably lapped on the outer surface of the snap positioning strip (a6). A resilient support leg (18) is fixedly connected to the outer surface of the left activity rod (14).

7. A butterfly valve with a dust-proof function according to claim 6, characterized in that: One end of the resilient support leg (18) is fixedly connected to the outer surface of the hollow flexible strip (19). The outer surface of the brush (110) is fixedly connected to the outer surface of the hollow flexible strip (19). And the outer surface of the brush (110) is movably attached to the outer surface of the filter mesh plate (a5). A wind guide vane (111) is fixedly connected to the outer surface of the right activity rod (14).

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