A circular butterfly gate with buffering opening and closing function

Abstract

The utility model discloses a kind of circular butterfly valves with buffer opening and closing function, belong to butterfly valve technical field, including valve body, the valve body inside rotation is connected with valve flap, the valve body top is equipped with support box, the support box inside rotation is connected with rotating shaft, the rotating shaft end away from support box and valve flap inside connection, the valve body inner bottom is also equipped with and the support shaft of valve flap rotation connection, the outer surface of the rotating shaft end away from valve flap is equipped with worm wheel, the support box inside rotation is connected with the worm that worm wheel is engaged with each other, the support box inside is equipped with the buffer assembly of slowing down the rotation speed of valve flap, the detection component of the valve body bottom is equipped with and carries out the detection of valve body, by the buffer assembly of being set, reached, when valve flap rotates, buffering effect can be achieved, water hammer effect can be effectively eliminated, prevent pipeline rupture, downstream equipment can also be protected simultaneously, reduce maintenance cost, reduce component wear and tear, reduce operation frequency.

Description

Technical Field

[0001] This utility model relates to the field of butterfly gate technology, specifically a circular butterfly gate with buffer opening and closing function. Background Technology

[0002] A circular butterfly gate is essentially a butterfly valve with a disc-shaped structure, belonging to the category of valves. Its core function is to control the flow of fluid in a pipeline or regulate its flow rate through the rotation of a circular valve disc. In existing technology, there is no dedicated buffering mechanism for the disc itself; only a buffer mesh is used for buffering. On the one hand, the buffer mesh's buffering effect may be limited when encountering high-velocity liquids, and on the other hand, the installed buffer mesh may become unstable after continuous liquid impact. However, a butterfly valve with a buffer device, as described in announcement number CN218152395U, allows the liquid to pass through the shell simultaneously with the valve opening. The impact force will cause the turntable to extend or shorten. The movement of the spring coil will cause the slider to move within the groove. The horizontal and vertical spring coils can buffer and absorb the impact force in the horizontal and vertical directions respectively, thus providing a buffer protection for the turntable. Furthermore, because the slider is larger on the side closer to the groove than on the side connected to the round rod, it is difficult for the slider to slide out of the groove when a large liquid flow is required. The entire device has high stability, and the spring coil and slider can withstand large impact pressure, providing a good buffer protection effect.

[0003] While the aforementioned technology can provide buffer protection for the turntable, it has the problem that it cannot buffer the valve disc when it opens and closes. Without buffering, the rapid opening and closing of the valve disc will cause a sudden change in the fluid velocity in the pipeline, forming a high-pressure shock wave. Water hammer impacts the inner wall of the pipeline, causing severe vibration of the pipeline, accompanied by a piercing water hammer sound. Long-term vibration will cause the pipeline support to loosen and the weld joints to crack. Utility Model Content

[0004] The purpose of this invention is to provide a circular butterfly gate with a buffer opening and closing function to solve the problem mentioned in the background art that the current circular butterfly valves on the market cannot buffer the valve disc when it opens and closes.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circular butterfly gate with buffer opening and closing function, comprising a valve body, a valve disc rotatably connected inside the valve body, a support box at the top of the valve body, a rotating shaft rotatably connected inside the support box, the end of the rotating shaft away from the support box being connected to the inside of the valve disc, a support shaft rotatably connected to the valve disc at the bottom of the valve body, a worm gear on the outer surface of the end of the rotating shaft away from the valve disc, a worm gear meshing with the worm gear rotatably connected inside the support box, a buffer assembly for slowing down the rotation speed of the valve disc inside the support box, and a detection assembly for detecting the valve body at the bottom of the valve body.

[0006] Preferably, the buffer assembly includes a ring of hollow cylinders respectively disposed inside the support box, and a piston is slidably connected inside each of the ring of hollow cylinders. A first spring is provided between the top of each piston and the inside of the hollow cylinder, and a push rod is slidably connected to the bottom of each piston inside the hollow cylinder.

[0007] Preferably, the outer surface of the rotating shaft is also provided with a support plate, and both sides of the support plate are provided with connecting rods, and the ends of the two connecting rods away from the support plate are provided with wedge blocks, the bottom of the wedge blocks being lower than the bottom of the push rod.

[0008] Preferably, each of the hollow cylinders has an exhaust hole at the top, and the diameter of the bottom of the piston is the same as the diameter of the inside of the hollow cylinder.

[0009] Preferably, the detection component includes a support frame disposed at the bottom of the valve body, wherein a water-absorbing test paper is movably abutted against the bottom of the support frame, and pressure plates are slidably connected to both ends inside the support frame.

[0010] Preferably, each end of the support frame is provided with a support block, and a second spring is provided between the bottom of the two support blocks and the top of the two pressure plates, and the absorbent paper is filled with cobalt chloride.

[0011] Preferably, the end of the worm gear away from the support box is provided with a rotating wheel, and the hollow cylinders are distributed at equal angles around the center point of the rotating shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: By rotating the worm gear, the worm wheel and shaft are driven to rotate, which in turn drives the valve disc to rotate, allowing fluid to pass through the valve body. The rotation angle of the valve disc can be precisely controlled by controlling the number of rotations of the worm gear, thereby stabilizing and regulating the fluid flow rate.

[0013] By using a buffer component, the valve disc can be buffered when it rotates, which can effectively eliminate water hammer effect, prevent pipeline rupture, protect downstream equipment, reduce maintenance costs, reduce component wear, and reduce maintenance frequency.

[0014] By setting up detection components, the valve body can be leaked, which can detect leaks in advance, prevent the problem from escalating, stop the chain reaction of failure, reduce maintenance costs, and prevent secondary damage to the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the front structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the piston and push rod connection structure of this utility model; Figure 5 This is a schematic diagram of the connection structure between the support frame and the pressure plate of this utility model; Figure 6 This utility model Figure 3 A magnified structural diagram of point A in the middle.

[0016] In the diagram: 1. Valve body; 2. Valve disc; 3. Support box; 4. Rotary shaft; 5. Worm gear; 6. Worm; 7. Hollow cylinder; 8. Piston; 9. Push rod; 10. Exhaust port; 11. Support plate; 12. Wedge block; 13. Support frame; 14. Absorbent paper; 15. Pressure plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model provides the following technical solution: a circular butterfly gate with a buffer opening and closing function. Example 1: To address the problem that existing circular butterfly valves cannot buffer the opening and closing of valve disc 2, the following is disclosed: a valve body 1, with valve disc 2 rotatably connected inside the valve body 1 (e.g., Figures 1-3 As shown), a support box 3 is provided on the top of the valve body 1. A rotating shaft 4 is rotatably connected inside the support box 3. The end of the rotating shaft 4 away from the support box 3 is connected to the inside of the valve disc 2. A support shaft rotatably connected to the valve disc 2 is also provided at the bottom of the valve body 1. A worm gear 5 is provided on the outer surface of the end of the rotating shaft 4 away from the valve disc 2. A worm 6 meshing with the worm gear 5 is rotatably connected inside the support box 3. A buffer assembly for slowing down the rotation speed of the valve disc 2 is provided inside the support box 3. The buffer assembly includes a ring of hollow cylinders 7 (such as...) respectively set inside the support box 3. Figures 1-4and Figure 6 As shown), pistons 8 are slidably connected inside a ring of hollow cylinders 7 to compress the air inside the hollow cylinders 7. A first spring is provided between the top of each piston 8 and the inside of the hollow cylinder 7. Push rods 9 are slidably connected to the bottom of each piston 8 inside the hollow cylinder 7. A support plate 11 is also provided on the outer surface of the rotating shaft 4. Connecting rods are provided on both sides of the support plate 11, and wedge-shaped blocks 12 are provided at the ends of the two connecting rods furthest from the support plate 11. The bottom of the wedge-shaped blocks 12 is lower than the bottom of the push rods 9. Exhaust holes 10 are opened at the top of each ring of hollow cylinders 7. The diameter of the bottom of each piston 8 is the same as the diameter of the inside of the hollow cylinder 7 (e.g., ...). Figure 4 As shown), a wheel is provided at the end of the worm gear 6 away from the support box 3 to facilitate the rotation of the worm gear 6, and a ring of hollow cylinders 7 are distributed at equal angles around the center point of the rotating shaft 4.

[0019] First, install the valve body 1 in a suitable position. Then, when fluid needs to pass through, rotate the rotating wheel 5 to drive the worm gear 6 to rotate. Subsequently, under the action of the worm wheel 5, it drives the rotating shaft 4 to rotate. Then, under the action of the support shaft (such as... Figures 1-3 As shown), this causes the valve disc 2 to rotate. When the rotating shaft 4 rotates, it further drives the support plate 11 to rotate. Then, under the action of the connecting rod, it drives the wedge block 12 to rotate synchronously. As the wedge block 12 rotates, its inclined side will gradually contact the bottom of the push rod 9. Since the bottom of the wedge block 12 is lower than the bottom of the push rod 9, it will push the push rod 9 upward during rotation. When it continues to rotate, the inclined surface of the wedge block 12 will apply an upward thrust to the piston 8 through the push rod 9, overcoming the elastic force of the first spring inside the hollow cylinder 7, and pushing the piston 8 inside the hollow cylinder 7. As the piston 8 slides upward, it compresses the air inside the hollow cylinder 7. Since the bottom diameter of the piston 8 perfectly matches the inner diameter of the hollow cylinder 7, the compressed air can only be slowly discharged through the exhaust port 10 at the top. The resistance of the air discharge will generate a damping force on the upward speed of the piston 8. This damping force acts in the opposite direction on the rotating shaft 4 through the push rod 9, wedge block 12, and support plate 11, forcibly reducing the rotational speed of the rotating shaft 4, thereby causing the rotational speed of the valve disc 2 to slow down synchronously. When the wedge block 12 moves away from the push rod 9, the piston 8 will reset under the action of the first spring (e.g., Figure 4 As shown), this allows air to re-enter the hollow cylinder 7, and the hollow cylinder 7, which is distributed at equal angles to the center point of the rotating shaft 4, ensures uniform buffering force.

[0020] Example 2: Unlike Example 1, the detection component can be used to detect the valve body 1. It is disclosed that: a detection component for detecting the valve body 1 is provided at the bottom of the valve body 1. The detection component includes a support frame 13 (e.g., ...) located at the bottom of the valve body 1. Figure 1 , Figure 2 and Figure 5As shown), the bottom of the support frame 13 is movably abutted against absorbent paper 14 for leak detection of the valve body 1. Pressure plates 15 are slidably connected to both ends of the support frame 13. Support blocks are provided at both ends of the support frame 13, and second springs (such as...) are provided between the bottom of the two support blocks and the tops of the two pressure plates 15. Figure 5 As shown in the figure, the absorbent paper 14 is filled with cobalt chloride, which can react with water.

[0021] After the valve body 1 is installed, the pressure plate 15 can be pushed upwards to compress the second spring, and then absorbent paper 14 (such as...) can be placed on the support frame 13. Figure 1 , Figure 2 and Figure 5 As shown), the pushing force on the pressure plate 15 is then released, and under the action of the second spring, the pressure plate 15 is reset, thereby pressing the two sides of the absorbent paper 14. When the valve body 1 leaks, the fluid inside the valve body 1 seeps out from the leak point and drips or permeates down the outer wall of the valve body 1, eventually flowing to the surface of the absorbent paper 14 at the bottom of the valve body 1. The absorbent paper 14 can then absorb water, and the cobalt chloride (blue when anhydrous) filled inside it will react with the adsorbed water to generate cobalt chloride hexahydrate (pink). As the amount of water adsorbed increases, the discolored area of ​​the absorbent paper 14 will gradually expand from the corresponding position of the leak point, and the color will change from blue to obvious pink. The valve body 1 can be visually judged to have a leak.

[0022] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] The contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A circular butterfly gate with buffer opening and closing function, comprising a valve body (1), wherein a valve disc (2) is rotatably connected inside the valve body (1); Its features are: The valve body (1) is provided with a support box (3) at the top. A rotating shaft (4) is rotatably connected inside the support box (3). The end of the rotating shaft (4) away from the support box (3) is connected to the inside of the valve disc (2). The bottom of the valve body (1) is also provided with a support shaft that is rotatably connected to the valve disc (2). A worm gear (5) is provided on the outer surface of the end of the rotating shaft (4) away from the valve disc (2). A worm (6) that meshes with the worm gear (5) is rotatably connected inside the support box (3). A buffer assembly that slows down the rotation speed of the valve disc (2) is provided inside the support box (3). A detection assembly for detecting the valve body (1) is provided at the bottom of the valve body (1).

2. A circular butterfly gate with buffer opening and closing function according to claim 1, characterized in that: The buffer assembly includes a ring of hollow cylinders (7) respectively disposed inside the support box (3). Pistons (8) are slidably connected inside the ring of hollow cylinders (7). A first spring is provided between the top of the piston (8) and the inside of the hollow cylinder (7). A push rod (9) is slidably connected inside the hollow cylinder (7) at the bottom of the piston (8).

3. A circular butterfly gate with buffer opening and closing function according to claim 2, characterized in that: The outer surface of the rotating shaft (4) is also provided with a support plate (11). Both sides of the support plate (11) are provided with connecting rods, and the ends of the two connecting rods away from the support plate (11) are provided with wedge blocks (12). The bottom of the wedge blocks (12) is lower than the bottom of the push rod (9).

4. A circular butterfly gate with buffer opening and closing function according to claim 3, characterized in that: The top of the hollow cylinder (7) is provided with an exhaust hole (10), and the bottom diameter of the piston (8) is the same as the inside diameter of the hollow cylinder (7).

5. A circular butterfly gate with buffer opening and closing function according to claim 1, characterized in that: The detection component includes a support frame (13) located at the bottom of the valve body (1), with absorbent paper (14) movably abutting against the bottom of the support frame (13), and pressure plates (15) slidably connected to both ends inside the support frame (13).

6. A circular butterfly gate with buffer opening and closing function according to claim 5, characterized in that: The support frame (13) has support blocks at both ends, and a second spring is provided between the bottom of the two support blocks and the top of the two pressure plates (15). The absorbent paper (14) is filled with cobalt chloride.

7. A circular butterfly gate with buffer opening and closing function according to claim 2, characterized in that: The worm (6) has a rotating wheel at the end away from the support box (3), and the hollow cylinder (7) is distributed at an angle to the center point of the rotating shaft (4).

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