High-sealing leakproof butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a high-sealing leakproof butterfly valve which comprises a valve body, a valve rod, a flange plate and a butterfly plate, the valve rod penetrates through the top of the valve body and extends into the valve body, the butterfly plate is fixedly connected to the bottom end of the valve rod, and the butterfly plate and a valve seat in the valve body are arranged in a sealed mode. The flange plates are installed at the two ends of the valve body respectively, the top of the valve body is fixedly connected with an installation frame, the outer side of the installation frame is fixedly connected with a shell, and a buffering structure is arranged in the shell and comprises a rotating rod A. Through the arranged buffering structure, the sealing plate rotates along with the butterfly plate, the sealing plate is used for resisting impact of water flow, the butterfly plate can be used for blocking liquid in the valve body from passing through, the double-layer sealing effect is achieved, when the edge of the filtering plate is attached to the interior of the valve body, the filtering plate is used for filtering the liquid flowing in the valve body, and impurities in the liquid can be filtered out.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, and particularly relates to a butterfly valve with high sealing performance and anti-leakage function. Background Technique

[0002] A butterfly valve, also called a flap valve, is a simple-structured regulating valve. A butterfly valve used for the on-off control of a low-pressure pipeline medium refers to a valve whose closing member (valve flap or butterfly plate) is a disc and rotates around the valve shaft to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. It mainly plays a role of cutting off and throttling in the pipeline. The opening and closing member of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve opening, closing, or adjustment.

[0003] After retrieval, the Chinese patent publication number is CN216843149U, and the disclosed literature is as follows: It includes a butterfly valve body. The butterfly plate is rotatably connected to the inner cavity of the butterfly valve body through a valve stem. A sealing device in contact with the valve plate is arranged inside the butterfly valve body. An extrusion spring in contact with the rubber sealing ring is arranged in the spring groove. A ceramic sealing ring is fixedly arranged on the contact surface between the valve plate and the rubber sealing ring. A filter screen for filtering impurities and connected to the butterfly valve body is arranged on one side of the valve plate. A buffer spring is fixedly connected to the peripheral side wall of the connection between the filter screen and the butterfly valve body. An annular groove body for buffering the buffer spring is arranged on the inner wall of the butterfly valve body. A waste discharging device for facilitating the discharge of impurities is arranged below the left side of the filter screen. After adopting the above technical solution, the beneficial effect of the utility model is: the sealing performance is improved. At the same time, the filter screen has a buffering function, which plays a protective role for the filter screen, and it is convenient to discharge the filtered impurities to prevent blockage.

[0004] The prior art lacks an anti-leakage mechanism. The inner side of the butterfly valve usually adopts ceramic contact. After long-term use, due to the rigid contact of the contact surface, the wear is relatively serious. Therefore, the sealing performance begins to decline, the anti-leakage time is not persistent, the fluid is prone to leakage, which affects the use effect and safety of the butterfly valve, and it must be regularly overhauled to temporarily ensure no leakage for a period of time. In view of this, we propose a butterfly valve with high sealing performance and anti-leakage function. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the present utility model provides a butterfly valve with high sealing and leakage prevention, which solves the problems raised in the above-mentioned background technology. To achieve the above objectives, the present utility model is realized through the following technical solutions: A butterfly valve with high sealing and leakage prevention, including a valve body, a valve stem, a flange, and a butterfly plate. The valve stem penetrates through the top of the valve body and extends into the interior of the valve body. The butterfly plate is fixedly connected to the bottom end of the valve stem. The butterfly plate is hermetically arranged with the valve seat inside the valve body. The flanges are respectively installed at both ends of the valve body. A mounting frame is fixedly connected to the top of the valve body. An outer shell is fixedly connected to the outside of the mounting frame. A buffer structure is arranged inside the outer shell. The buffer structure includes a rotating rod A, and the rotating rod A is fixedly connected to the other end of the worm. The other end of the rotating rod A is fixedly connected to a pulley A. The inner wall of the outer shell is rotationally connected to a rotating rod B through a bearing. The other end of the rotating rod B sequentially penetrates through the outer shell and the mounting frame and is fixedly connected to a bevel gear A. The top inner wall of the mounting frame is rotationally connected to a rotating rod C through a bearing. A bevel gear B is fixedly sleeved on the surface of the rotating rod B. The bevel gear A and the bevel gear B are meshed. The bottom end of the rotating rod C movably penetrates through the top of the valve body and is connected to a switching component.

[0006] Preferably, the switching component includes a filter plate. A sealing plate is fixedly connected to the middle of the filter plate. First grooves are formed at the edges of both the filter plate and the sealing plate. Sealing strips are fixedly connected to the groove walls of the first grooves.

[0007] Preferably, the butterfly plate and the sealing plate are in the same direction and symmetrically arranged. When the butterfly plate rotates, it will drive the sealing plate to rotate simultaneously. Therefore, the rotation directions of the butterfly plate and the sealing plate are always the same. The sealing plate is used to resist the first impact of the water flow on the butterfly plate, achieving two sealing effects at the front and back of the valve body and improving the sealing performance inside the valve body.

[0008] Preferably, the filter plate and the sealing plate are perpendicular to each other. Both the filter plate and the sealing plate are circular. When the butterfly plate is opened to allow the liquid inside the valve body to flow, the edge of the filter plate fits with the inside of the valve body. The filter plate is used to filter the liquid flowing inside, and can filter impurities in the liquid.

[0009] Preferably, a worm gear is fixedly sleeved on the surface of the valve stem. A worm is arranged inside the mounting frame. Both ends of the worm respectively penetrate through the inner wall of the mounting frame through bearings. A handwheel is fixedly connected to one end of the worm. The worm is meshed with the worm gear.

[0010] Preferably, one end of the valve body close to the switching component is the water inlet. A sealing ring is arranged at the connection between the valve stem and the rotating rod C inside the valve body. The sealing ring can improve the sealing performance between the valve body and the rotating rod C on the inner wall of the valve body.

[0011] Preferably, the first groove and the sealing strip are both arc-shaped, and the edge of the filter plate is in sealing contact with the inner wall of the valve body. The first groove is provided for installing the sealing strip, and the sealing strip improves the sealing performance of the inner wall of the valve body.

[0012] As can be seen from the above technical solutions, a butterfly valve with high sealing and anti-leakage provided by the embodiments of this specification has at least the following beneficial effects:

[0013] (1) Through the buffer structure provided in the present invention, the sealing plate rotates with the butterfly plate. The sealing plate is used to resist the impact of water flow, and the butterfly plate can block the liquid inside the valve body, achieving a double-layer sealing effect. When the edge of the filter plate fits with the inside of the valve body, the filter plate filters the liquid flowing inside, and can filter impurities in the liquid.

[0014] (2) Through the switching component provided in the present invention, the switching between the sealing and filtering effects can be realized. The sealing ring provided improves the sealing performance of the filter plate and the sealing plate on the inner wall of the valve body, thereby playing a role in preventing leakage. Description of the Drawings

[0015] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a cross-sectional view of the present invention;

[0018] Figure 3 It is an enlarged view of the structure of A in the present invention;

[0019] Figure 4 It is a schematic diagram of the switching component of the present invention.

[0020] In the figure: 1, valve body; 2, mounting bracket; 3, flange; 4, housing; 5, handwheel; 6, worm; 7, valve stem; 8, worm gear; 9, buffer structure; 901, rotating rod A; 902, rotating rod B; 903, pulley A; 904, pulley B; 905, bevel gear A; 906, bevel gear B; 907, switching component; 9071, filter plate; 9072, sealing plate; 9073, first groove; 9074, sealing strip; 908, rotating rod C. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0022] Please refer to Figures 1 - 3 As shown, a high-sealing and leak-proof butterfly valve includes a valve body 1, a valve stem 7, a flange 3, and a butterfly plate. The valve stem 7 penetrates through the top of the valve body 1 and extends into the interior of the valve body 1. The butterfly plate is fixedly connected to the bottom end of the valve stem 7. The butterfly plate is hermetically arranged with the valve seat inside the valve body 1. The flanges 3 are respectively installed at both ends of the valve body 1. A worm gear 8 is fixedly sleeved on the surface of the valve stem 7. A worm 6 is arranged inside the mounting frame 2. Both ends of the worm 6 respectively penetrate through the inner wall of the mounting frame 2 through bearings. One end of the worm 6 is fixedly connected to a handwheel 5. The worm 6 meshes with the worm gear 8. The top of the valve body 1 is fixedly connected to a mounting frame 2. The outside of the mounting frame 2 is fixedly connected to a housing 4. A buffer structure 9 is arranged inside the housing 4. The buffer structure 9 includes a rotating rod A901. The rotating rod A901 is fixedly connected to the other end of the worm 6. The other end of the rotating rod A901 is fixedly connected to a pulley A903. The inner wall of the housing 4 is rotatably connected to a rotating rod B902 through a bearing. The other end of the rotating rod B902 sequentially penetrates through the housing 4 and the mounting frame 2 and is fixedly connected to a bevel gear A905. The inner top wall of the mounting frame 2 is rotatably connected to a rotating rod C908 through a bearing. A bevel gear B906 is fixedly sleeved on the surface of the rotating rod B902. The bevel gear A905 meshes with the bevel gear B906. The bottom end of the rotating rod C908 movably penetrates through the top of the valve body 1 and is connected to a switching assembly 907.

[0023] Furthermore, through the arranged buffer structure 9, the sealing plate 9072 follows the rotation of the butterfly plate, uses the sealing plate 9072 to resist the impact of water flow, uses the butterfly plate to block the liquid inside the valve body 1 from passing through, realizes a double-sealing effect. When the edge of the filter plate 9071 fits with the inside of the valve body 1, the filter plate 9071 filters the liquid flowing inside, and can filter impurities in the liquid. Embodiment 2

[0024] Please refer to Figures 3 - 4As shown in the figure, the switching component 907 includes a filter plate 9071. A sealing plate 9072 is fixedly connected to the middle of the filter plate 9071. First grooves 9073 are formed at the edges of both the filter plate 9071 and the sealing plate 9072. A sealing strip 9074 is fixedly connected to the groove wall of the first groove 9073. The butterfly plate is arranged in the same direction as and symmetrically with the sealing plate 9072. When the butterfly plate rotates, it will drive the sealing plate 9072 to rotate simultaneously. Therefore, the rotation directions of the butterfly plate and the sealing plate 9072 are always the same. The sealing plate 9072 is used to resist the first impact of the water flow by the butterfly plate, achieving two sealing effects at the front and back of the valve body 1 and improving the sealing performance inside the valve body 1. The filter plate 9071 is perpendicular to the sealing plate 9072. Both the filter plate 9071 and the sealing plate 9072 are circular. When the butterfly plate is opened to allow the liquid inside the valve body 1 to flow, the edge of the filter plate 9071 fits with the inside of the valve body 1. The filter plate 9071 filters the liquid flowing inside, capable of filtering impurities in the liquid. One end of the valve body 1 close to the switching component 907 is the water inlet. A sealing ring is provided at the connection between the valve stem 7 and the rotating rod C908 in the valve body 1. By providing the sealing ring, the sealing performance between the valve body 1 and the rotating rod C908 on the inner wall of the valve body 1 can be improved. The first grooves 9073 and the sealing strips 9074 are both arc-shaped. The edge of the filter plate 9071 is in sealed contact with the inner wall of the valve body 1. The first grooves 9073 are provided for installing the sealing strips 9074, and the sealing strips 9074 are provided to improve the sealing performance of the inner wall of the valve body 1.

[0025] Furthermore, by providing the switching component 907, the switching between the sealing and filtering effects can be achieved. By providing the sealing ring, the sealing performance between the filter plate 9071 and the sealing plate 9072 on the inner wall of the valve body 1 can be improved, thus playing a role in preventing leakage.

[0026] When a high-sealing and leak-proof butterfly valve of the utility model is in use, by rotating the handwheel 5, the handwheel 5 drives the worm 6 to rotate. Through the meshing of the worm 6 and the worm wheel 8, the worm 6 drives the worm wheel 8 to rotate, and the worm wheel 8 drives the valve stem 7 to rotate. The bottom end of the valve stem 7 drives the butterfly plate to rotate. The worm 6 drives the rotating rod A901 to rotate. Due to the transmission of the belt between the pulley A903 and the pulley B904, the rotating rod A901 drives the rotating rod B902 to rotate in the same direction, and the rotating rod B902 drives the bevel gear A905 to rotate. Since the bevel gear A905 and the bevel gear B906 are meshed, the bevel gear A905 drives the bevel gear B906 to rotate, and the bevel gear B906 drives the rotating rod C908 to rotate. By driving the rotating rod C908, the switching assembly 907 is rotated. The butterfly plate can block the liquid inside the valve body 1 from passing through. At this time, the front sealing plate 9072 closes the inside of the valve body 1. The sealing strip 9074 can improve the sealing performance of the sealing plate 9072. When the butterfly plate is opened to allow the liquid inside the valve body 1 to pass through, the edge of the filter plate 9071 fits with the inside of the valve body 1. The filter plate 9071 filters the liquid flowing inside, and can filter out impurities in the liquid.

[0027] The above embodiments are only used to illustrate the embodiments of the present invention, rather than limiting the embodiments of the present invention. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present invention. The patent protection scope of the embodiments of the present invention shall be defined by the claims.

Claims

1. A highly sealed and leakproof butterfly valve, comprising a valve body (1), a valve stem (7), a flange (3), and a butterfly plate, wherein the valve stem (7) penetrates from the top of the valve body (1) and extends into the interior of the valve body (1), the butterfly plate is fixedly connected to the bottom end of the valve stem (7), the butterfly plate is sealed against a valve seat in the interior of the valve body (1), and the flange (3) is respectively mounted at both ends of the valve body (1), and is characterized in that: The top of the valve body (1) is fixedly connected to a mounting frame (2), the outer side of the mounting frame (2) is fixedly connected to a housing (4), a buffer structure (9) is provided inside the housing (4), and the buffer structure (9) comprises a rotating rod A (901), the rotating rod A (901) is fixedly connected to the other end of the worm (6), the other end of the rotating rod A (901) is fixedly connected to a pulley A (903), the inner wall of the housing (4) is rotatably connected to a rotating rod B (902) via a bearing, the other end of the rotating rod B (902) passes through the housing (4) and the mounting frame (2) in sequence and is fixedly connected to a bevel gear A (905), the inner wall of the top surface of the mounting frame (2) is connected to the shaft The bearing is rotatably connected to a rotating rod C (908); a surface of the rotating rod B (902) is fixedly sleeved with a bevel gear B (906); the bevel gear A (905) is meshed with the bevel gear B (906); the bottom end of the rotating rod C (908) movably passes through the top of the valve body (1) and is connected to a switching assembly (907); the switching assembly (907) includes a filter plate (9071); a sealing plate (9072) is fixedly connected to the middle of the filter plate (9071); a first groove (9073) is provided on the edges of the filter plate (9071) and the sealing plate (9072); a sealing strip (9074) is fixedly connected to the groove wall of the first groove (9073).

2. A highly sealed and leakproof butterfly valve according to claim 1, characterized in that: The butterfly plate and the sealing plate (9072) are arranged in the same direction and symmetrically with each other.

3. A highly sealed and leakproof butterfly valve according to claim 1, characterized in that: The filter plate (9071) and the sealing plate (9072) are perpendicular to each other, and the filter plate (9071) and the sealing plate (9072) are both arranged in a circular shape.

4. A highly sealed and leakproof butterfly valve according to claim 1, characterized in that: The surface of the valve stem (7) is fixedly sleeved on the worm wheel (8), a worm (6) is arranged on the inner side of the mounting frame (2), two ends of the worm (6) are respectively fixed through the inner wall of the mounting frame (2) by bearings, one end of the worm (6) is fixedly connected to a hand wheel (5), and the worm (6) is meshed with the worm wheel (8).

5. A highly sealed and leakproof butterfly valve according to claim 1, characterized in that: One end of the valve body (1) close to the switching assembly (907) is a water inlet, and a sealing ring is provided at the connection between the valve stem (7) and the rotating rod C (908) on the valve body (1).

6. A highly sealed and leakproof butterfly valve according to claim 1, characterized in that: The No. 1 groove (9073) and the sealing strip (9074) are both arc-shaped, and the edge of the filter plate (9071) is in sealing contact with the inner wall of the valve body (1).

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