Butterfly gate type check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a butterfly door type check valve which comprises a valve body, the valve body is hollow, a protrusion is fixedly arranged on the inner wall of the valve body, a shaft seat is fixedly arranged on the upper end face of the protrusion, a rotating shaft assembly is rotationally arranged on the shaft seat, and a butterfly plate structure is fixedly arranged on the rotating shaft assembly and located in an inner cavity of the valve body. First reinforcing ribs and second reinforcing ribs are fixedly arranged on the outer end face of the butterfly plate structure, the first reinforcing ribs are arranged in a semi-circular ring shape, the second reinforcing ribs are fixedly connected with the first reinforcing ribs, the second reinforcing ribs are located on the inner sides of the first reinforcing ribs, and the second reinforcing ribs are arranged in a radial shape. By arranging the semicircular first reinforcing ribs and the radial second reinforcing ribs, the structural strength of the butterfly plate can be improved, meanwhile, the weight of the butterfly plate is reduced, pressure loss is reduced, the air volume performance is improved, the defects caused by the fact that the strength is enhanced by increasing the thickness of the butterfly plate are overcome, the local rigidity of the butterfly plate structure is enhanced, and edge vibration is reduced; and the bending strength and the torsional strength are improved while the light weight is ensured.

Description

Technical Field

[0001] This application relates to the field of check valve technology, and in particular to a butterfly gate check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that operates by its own weight and the pressure of the medium, thereby preventing the backflow of the medium. The main function of a check valve is to prevent the backflow of the medium.

[0003] Chinese utility model patent application No. 202020736036.7—a double-valve check valve—includes a valve body with a cylindrical chamber. A double-valve diaphragm is disposed within the cylindrical chamber. The double-valve diaphragm includes a first butterfly plate, a second butterfly plate, a fixing pin, and a fixing block. The fixing block is disposed in the cross-section of the cylindrical chamber, with both ends fixed to the cylindrical chamber. The fixing pin is disposed on the fixing block. The first and second butterfly plates are semi-circular components, rotatably connected to the fixing pin, and forming a circular component that fits tightly against the inner wall of the cylindrical chamber. The first and second butterfly plates are respectively provided with a first rubber gasket and a second rubber gasket, ensuring a sealing fit between the circular component and the inner wall of the cylindrical chamber. This utility model employs a double-valve diaphragm structure, which eliminates the need for springs, resulting in low fluid resistance, sensitive operation, good sealing, rapid closure, and a long service life.

[0004] Existing butterfly check valves, and the double-disc check valve described in the aforementioned patent, require a certain thickness for the disc to achieve sufficient strength. While a thicker disc provides better strength, it significantly increases flow resistance. This increased flow resistance affects fluid flow efficiency and increases turbulence. Using this type of check valve in fan ducts results in poor airflow performance (airflow performance refers to the volume of air that the equipment can deliver per unit time), and the increased turbulence significantly increases pressure loss, thereby increasing the operating costs of the fan. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a butterfly check valve. The technical problem it solves is that existing butterfly check valves used in fan ducts affect airflow performance and significantly increase fan operating costs. The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A butterfly gate check valve, comprising:

[0007] The valve body is hollow, and a protrusion is fixedly installed on the inner wall of the valve body.

[0008] The bearing seat is fixedly mounted on the upper end face of the protrusion.

[0009] The rotating shaft assembly is rotatably connected with the shaft base;

[0010] The butterfly plate structure is fixedly connected with the rotating shaft assembly and is located in the inner cavity of the valve body.

[0011] The first reinforcing rib is fixedly arranged on the outer end surface of the butterfly plate structure and is arranged in a semicircular ring shape.

[0012] The second reinforcing rib is fixedly arranged on the outer end surface of the butterfly plate structure, is fixedly connected with the first reinforcing rib, is located on the inner side of the first reinforcing rib, and a plurality of second reinforcing ribs are arranged in a radial shape.

[0013] Further, the rotating shaft assembly comprises a first rotating shaft, a second rotating shaft and a shaft sleeve, the shaft sleeve is fixedly connected with the shaft base, and the first rotating shaft and the second rotating shaft are rotatably connected with the shaft sleeve.

[0014] Further, the butterfly plate structure comprises a first butterfly plate and a second butterfly plate, the first butterfly plate is fixedly connected with the first rotating shaft, the second butterfly plate is fixedly connected with the second rotating shaft, and the first butterfly plate and the second butterfly plate are both arranged in a semicircular shape.

[0015] Further, the inner end surface of the first butterfly plate is provided with a first concave surface corresponding to the first reinforcing rib, and the inner end surface of the second butterfly plate is provided with a second concave surface corresponding to the second reinforcing rib.

[0016] Further, the inner end surfaces of the first butterfly plate and the second butterfly plate are both embedded with sealing pads along the semicircular periphery thereof.

[0017] Further, the cross sections of the first reinforcing rib and the second reinforcing rib are both arranged in a streamline shape.

[0018] Further, the end portion of the second reinforcing rib close to the first reinforcing rib is fixedly provided with a Y-shaped transition section, and the second reinforcing rib is connected with the first reinforcing rib through the Y-shaped transition section.

[0019] The beneficial effects of the utility model are as follows: the first reinforcing rib and the second reinforcing rib can increase the strength of the butterfly plate structure while reducing the weight, reduce pressure loss, reduce fluid resistance, improve air volume performance, avoid the defects caused by increasing the thickness of the butterfly plate to enhance the strength, the first reinforcing rib is arranged in a semicircular ring shape, a plurality of second reinforcing ribs are arranged in a radial shape, the local rigidity of the butterfly plate structure is enhanced, edge vibration is reduced, and the bending and torsional strength is effectively improved while ensuring lightweight. DRAWINGS

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.

[0021] Figure 2 It is a top view of the utility model.

[0022] Figure 3 is the bottom view of the utility model.

[0023] Figure 4 is the bottom view of the utility model Figure 2 A enlarged view.

[0024] In the figure:

[0025] 1, valve body, 2, protrusion, 3, shaft seat, 4, shaft assembly, 41, first shaft, 42, second shaft, 43, shaft sleeve, 5, butterfly plate structure, 51, first butterfly plate, 52, second butterfly plate, 6, first reinforcing rib, 7, second reinforcing rib, 8, first concave surface, 9, second concave surface, 10, gasket, 11, Y-shaped transition section. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the drawings and examples, so that the public can better master the implementation method of the utility model, and the specific implementation scheme of the utility model is as follows:

[0027] A butterfly gate type check valve, comprising a valve body 1, the valve body 1 is hollowly arranged, the inner wall of the valve body 1 is fixedly provided with a protrusion 2, the upper end surface of the protrusion 2 is fixedly provided with a shaft seat 3, the shaft seat 3 is rotatably provided with a shaft assembly 4, the shaft assembly 4 is fixedly provided with a butterfly plate structure 5, the butterfly plate structure 5 is located at the inner cavity of the valve body 1, the outer end surface of the butterfly plate structure 5 is fixedly provided with a first reinforcing rib 6 and a second reinforcing rib 7, the first reinforcing rib 6 is arranged in a semicircular ring shape, the second reinforcing rib 7 is fixedly connected with the first reinforcing rib 6, and the second reinforcing rib 7 is located on the inner side of the first reinforcing rib 6, and the plurality of second reinforcing ribs 7 are arranged in a radial shape; by arranging the first reinforcing rib 6 and the second reinforcing rib 7, the strength of the butterfly plate structure 5 can be increased while the weight is reduced, the pressure loss is reduced, the air volume performance is improved, and the shortcomings caused by increasing the thickness of the butterfly plate to enhance the strength are avoided; by arranging the first reinforcing rib 6 in a semicircular ring shape and arranging the plurality of second reinforcing ribs 7 in a radial shape, the local rigidity of the butterfly plate structure 5 is enhanced, the edge vibration is reduced, and the bending and torsional strength is effectively improved while ensuring lightweight.

[0028] It should be noted that the shaft assembly 4 comprises a first shaft 41, a second shaft 42 and a shaft sleeve 43, the shaft sleeve 43 is fixedly connected with the shaft seat 3, and the first shaft 41 and the second shaft 42 are both rotatably connected with the shaft sleeve 43; the arrangement of the shaft sleeve 43 structure effectively reduces the wear between the shaft and the shaft seat 3, and prolongs the service life of the component.

[0029] It should be noted that the butterfly plate structure 5 includes a first butterfly plate 51 and a second butterfly plate 52, the first butterfly plate 51 is fixedly connected with the first rotating shaft 41, the second butterfly plate 52 is fixedly connected with the second rotating shaft 42, and the first butterfly plate 51 and the second butterfly plate 52 are both arranged in a semicircular shape.

[0030] It should be noted that the inner end face of the first butterfly plate 51 is provided with a first concave surface 8 corresponding to the first reinforcing rib 6, and the inner end face of the second butterfly plate 52 is provided with a second concave surface 9 corresponding to the second reinforcing rib 7; the setting is a kind of inlay structure, and the concave surface and the reinforcing rib form a kind of streamline transition, which can effectively reduce the flow resistance of fluid, reduce pressure loss, improve the flow capacity of check valve, and further improve the air volume performance.

[0031] Further, the inner end face of the first butterfly plate 51 and the second butterfly plate 52 is provided with a sealing pad 10 embedded along the semicircular periphery thereof; the design of the structure enhances the sealing property between the first butterfly plate 51 and the second butterfly plate 52 and the valve body 1, effectively reduces fluid leakage, and improves the sealing performance.

[0032] It should be noted that the cross section of the first reinforcing rib 6 and the second reinforcing rib 7 is arranged in a streamline shape; the structure is arranged to further reduce the fluid resistance while ensuring the strength of the first butterfly plate 51 and the second butterfly plate 52.

[0033] It should be noted that the end of the second reinforcing rib 7 close to the first reinforcing rib 6 is fixedly provided with a Y-shaped transition section 11, and the second reinforcing rib 7 is connected with the first reinforcing rib 6 through the Y-shaped transition section 11; the structure further improves the stability of the overall structure.

[0034] The working principle and working process of the utility model are as follows:

[0035] The first reinforcing rib 6 is arranged in a semicircular ring shape, and the second reinforcing rib 7 is arranged in a radial shape; the annular structure can significantly improve the bending strength of the butterfly plate structure 5, the radial layout can uniformly disperse the stress to multiple directions, avoid stress concentration, through the synergistic effect of the semicircular ring shape and the radial reinforcing rib, the bending and torsional resistance of the butterfly plate structure 5 is effectively enhanced, the strength of the butterfly plate structure 5 is significantly improved while ensuring the lightweight; and the design of the streamline cross section helps to reduce the fluid flow resistance, thereby improving the air volume performance.

[0036] The butterfly check valve is installed in the fan pipeline, the external fan is started, the fluid flows in the pipeline in the positive direction, the fluid power acts on the first butterfly plate 51 and the second butterfly plate 52, drives the first butterfly plate 51 and the second butterfly plate 52 to rotate through the first rotating shaft 41 and the second rotating shaft 42, the first butterfly plate 51 and the second butterfly plate 52 rotate towards each other, the first butterfly plate 51 and the second butterfly plate 52 are away from the upper end surface of the protrusion 2 of the valve body 1, and the fluid flows through; when the fluid flows back, the backflow fluid acts on the first butterfly plate 51 and the second butterfly plate 52, drives the first butterfly plate 51 and the second butterfly plate 52 to rotate through the first rotating shaft 41 and the second rotating shaft 42, the first butterfly plate 51 and the second butterfly plate 52 rotate away from each other, the sealing gasket 10 of the first butterfly plate 51 and the second butterfly plate 52 is in close contact with the upper end surface of the protrusion 2 of the valve body 1, and the backflow of the fluid is avoided.

[0037] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the protection scope of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Although the utility model is described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of the utility model described herein.

Claims

1. A butterfly check valve characterized by, The utility model relates to a valve body (1) is provided with the convex (2) on the inner wall, the shaft seat (3) is fixedly arranged on the upper end surface of the convex (2), the rotating shaft assembly (4) is connected with the shaft seat (3) rotationally, the butterfly plate structure (5) is connected with the rotating shaft assembly (4) fixedly, and the butterfly plate structure (5) is located at the inner cavity of the valve body (1), the first reinforcing rib (6) is fixedly arranged on the outer end surface of the butterfly plate structure (5), and the first reinforcing rib (6) is provided with semicircular ring shape. The second reinforcing rib (7) is fixedly arranged on the outer end surface of the butterfly plate structure (5), and the second reinforcing rib (7) is connected with the first reinforcing rib (6) fixedly, and the second reinforcing rib (7) is located on the inner side of the first reinforcing rib (6), and a plurality of second reinforcing ribs (7) are provided with radial shape. The rotating shaft assembly (4) includes the first rotating shaft (41), the second rotating shaft (42) and the shaft sleeve (43), the shaft sleeve (43) is connected with the shaft seat (3) fixedly, and the first rotating shaft (41) and the second rotating shaft (42) are connected with the shaft sleeve (43) rotationally. The butterfly plate structure (5) includes the first butterfly plate (51) and the second butterfly plate (52), the first butterfly plate (51) is connected with the first rotating shaft (41) fixedly, the second butterfly plate (52) is connected with the second rotating shaft (42) fixedly, and the first butterfly plate (51) and the second butterfly plate (52) are provided with semicircle shape. The first concave surface (8) corresponding with the first reinforcing rib (6) is arranged on the inner end surface of the first butterfly plate (51), and the second concave surface (9) corresponding with the second reinforcing rib (7) is arranged on the inner end surface of the second butterfly plate (52). The sealing pad (10) is embedded in the semicircular periphery of the inner end surface of the first butterfly plate (51) and the second butterfly plate (52). The cross section of the first reinforcing rib (6) and the second reinforcing rib (7) is provided with streamline shape.

2. A butterfly check valve according to claim 1, wherein: The end portion of the second reinforcing rib (7) close to the first reinforcing rib (6) is fixedly provided with the Y-shaped transition section (11), and the second reinforcing rib (7) is connected with the first reinforcing rib (6) through the Y-shaped transition section (11).

3. A butterfly check valve according to claim 1, wherein: ​ 4. A butterfly check valve according to claim 3, wherein: ​ 5. A butterfly check valve according to claim 3, wherein: ​ 6. A butterfly check valve according to claim 1, wherein: ​ 7. A butterfly check valve according to claim 1, wherein: ​

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