Stainless steel butterfly check valve

Abstract

The utility model discloses a stainless steel butterfly check valve which comprises a valve body, a rotating shaft is fixedly installed in the valve body, butterfly plates are symmetrically and rotationally connected to the periphery of the rotating shaft, fixing plates fixedly installed with the butterfly plates are rotationally connected to the periphery of the rotating shaft, and protection assemblies for buffering the butterfly plates are symmetrically arranged at the two ends in the valve body. The protection assembly comprises sliding grooves evenly formed in the valve body in a surrounding mode, sliding blocks sliding in the sliding grooves and reset springs fixedly installed in the sliding grooves and fixedly installed with the sliding blocks. The buffering baffles symmetrically arranged at the two ends in the valve body can buffer suddenly rushing water flow, impact on the butterfly plate is reduced, damage to the butterfly plate caused by water flow impact is reduced, the service life is prolonged, meanwhile, solid particles in the water flow can be filtered through the filtering baffles, abrasion to the butterfly plate is reduced, and the service life of the butterfly plate is prolonged. The service life of the butterfly plate is prolonged, and the replacement condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly check valve equipment, in particular to a stainless steel butterfly check valve. Background Art

[0002] A disc check valve is a valve used in piping systems. Its main function is to prevent reverse flow of fluid in the pipeline. Its working principle is based on a rotating disc that is pushed open when the fluid flows normally and automatically closes when the fluid flows in the reverse direction, thereby preventing reverse flow.

[0003] When the water flow rate changes drastically, such as water hammer, water hammer is a pressure fluctuation caused by the sudden cessation or change of water flow, which may produce an impact force on the butterfly plate of the valve. This impact force may cause the butterfly plate to deform, crack or other forms of damage, thereby affecting the use of the valve and increasing the need for staff to replace the butterfly plate. Utility Model Content

[0004] The purpose of the utility model is to provide a stainless steel butterfly check valve to solve the problem that when the water flow velocity changes drastically, such as the water hammer phenomenon, water hammer is due to pressure fluctuations caused by the sudden cessation or change of water flow, which may produce an impact force on the butterfly plate of the valve. This impact force may cause the butterfly plate to deform, crack or other forms of damage, thereby affecting the use of the valve and increasing the number of staff to replace the butterfly plate.

[0005] The cam is fixedly provided with a button bar and a push-button pin, and the push-button pin is installed in the cam face, and the push-button pin is installed in the cam face, and the push-button pin is installed in the cam face.

[0006] As a further solution of the present invention: a telescopic guide rod fixedly mounted with the sliding block is fixedly mounted inside the sliding groove, and the telescopic guide rod is sleeved inside the reset spring.

[0007] As a further solution of the present invention: a groove is provided on one end of the buffer baffle close to the sliding block, and the groove is evenly arranged around the one end of the buffer baffle, and the through hole is connected to the groove.

[0008] As a further solution of the present invention: a filter baffle is provided inside the valve body and on one side of the buffer baffle to reduce the wear of the butterfly plate by solid particles in the water flow, and through holes for the limit block 1 and the limit block 2 to pass through are also evenly opened around the outer periphery of the filter baffle.

[0009] As a further solution of the present invention, connecting flanges for installation are symmetrically fixed on both ends of the valve body.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model can buffer the sudden rush of water through the buffer baffles symmetrically arranged at both ends of the valve body, reduce the impact on the butterfly plate, reduce the damage of the butterfly plate caused by the impact of the water flow, and increase the service life of the butterfly plate. At the same time, the solid particles in the water flow can be filtered through the filtering baffle, reducing the wear on the butterfly plate, increasing the service life of the butterfly plate, and reducing the need for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0014] Figure 3 This utility model Figure 1 Schematic diagram of the local enlarged structure at A in the middle;

[0015] Figure 4 This utility model Figure 2 Schematic diagram of the local enlarged structure at B in the middle;

[0016] Figure 5 This is a schematic diagram of the explosion structure of the valve body of the utility model;

[0017] Figure 6 This utility model Figure 5 Schematic diagram of the local enlarged structure at point C in the middle.

[0018] In the figure: 1. Valve body; 2. Butterfly plate; 3. Rotating shaft; 4. Fixed plate; 5. Protective assembly; 51. Sliding groove; 52. Telescopic guide rod; 53. Return spring; 54. Sliding block; 55. Connecting rod; 56. Rotating shaft; 57. Limit block 1; 58. Limit block 2; 59. Return spring; 510. Buffer baffle; 511. Groove; 512. Through hole; 513. Filter baffle; 6. Connecting flange. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or connected in an integral manner; they can be mechanically connected or electrically connected; they can be directly connected, indirectly connected through an intermediate medium, or they can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The following describes the embodiments of the present invention based on its overall structure.

[0021] Reference Figures 1 to 6In the embodiment of the present invention, a stainless steel butterfly check valve includes a valve body 1, a rotating shaft 3 is fixedly installed inside the valve body 1, and a butterfly plate 2 is symmetrically connected to the outer periphery of the rotating shaft 3, and a fixed plate 4 is rotatably connected to the outer periphery of the rotating shaft 3 and fixedly installed with the butterfly plate 2. Protective components 5 for buffering the butterfly plate 2 are symmetrically arranged at both ends of the valve body 1. The protective component 5 includes a sliding groove 51 uniformly arranged around the inside of the valve body 1, a sliding block 54 sliding inside the sliding groove 51, and a fixed member 54 fixed to the sliding groove 51 and fixed to the sliding block 54. A return spring 53 is installed, a connecting rod 55 is fixedly installed at one end of the sliding block 54, a rotating shaft 56 is fixedly installed at one end of the connecting rod 55, and one end of the rotating shaft 56 is rotatably connected to the limit block 1 57, and one end of the rotating shaft 56 is rotatably connected to the limit block 2 58. A buffer baffle 510 is provided at one end of the valve body 1, and a through hole 512 is evenly opened around one end of the buffer baffle 510 for the limit block 1 57 and the limit block 2 58 to pass through. A return spring 59 is fixedly installed on the outer periphery of the rotating shaft 56 and fixedly installed with the limit block 1 57 and the limit block 2 58.

[0022] Reference Figures 1 to 6 A telescopic guide rod 52 fixedly mounted on the sliding block 54 is fixedly installed inside the sliding groove 51, and the telescopic guide rod 52 is sleeved inside the reset spring 53. A groove 511 is provided on one end of the buffer baffle 510 close to the sliding block 54, and the grooves 511 are evenly arranged around one end of the buffer baffle 510, and the through hole 512 is connected to the groove 511. A filter baffle 513 is provided inside the valve body 1 and on one side of the buffer baffle 510 to reduce the wear of the butterfly plate 2 by solid particles in the water flow, and the outer periphery of the filter baffle 513 is also evenly arranged with through holes 512 for the limit block 1 57 and the limit block 2 58 to pass through.

[0023] Reference Figures 1 to 6 , connecting flanges 6 for installation are symmetrically fixed at both ends of the valve body 1.

[0024] The working principle of the present utility model is as follows: when the valve body 1 is installed, the limit block 2 58 and the limit block 1 57 are first rotated by the rotating shaft 56, and the limit block 2 58 is rotated to the inside of the limit block 1 57, and then the overlapping limit block 1 57 and the limit block 2 58 are passed through the through hole 512 at one end of the buffer baffle 510 and the filter baffle 513. When the overlapping limit block 1 57 and the limit block 2 58 pass through the buffer baffle 510 and the filter baffle 513, the return spring 59 on the outer periphery of the rotating shaft 56 can bounce the overlapping limit block 1 57 and the limit block 2 58 apart, and limit the buffer baffle 510 and the filter baffle 513. At this time, the filter baffle 513 and the buffer baffle 510 are fixed at both ends of the butterfly plate 2. The buffer baffle 510 can buffer the sudden rush of water, reduce the impact on the butterfly plate 2, reduce the damage to the butterfly plate 2 caused by the water flow impact, and increase the service life. At the same time, the filter baffle 513 can filter the solid particles in the water flow, reduce the wear on the butterfly plate 2, increase the service life of the butterfly plate 2, and reduce the need for replacement. When it is necessary to remove the filter baffle 513 and the buffer baffle 510, you only need to pull them. When pulling, the limit block 1 57 and the limit block 2 58 will automatically retract into the through hole 512 through the return spring 59. At this time, the restrictions of the limit block 1 57 and the limit block 2 58 on the filter baffle 513 and the buffer baffle 510 are released, and the disassembly can be completed quickly.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stainless steel butterfly check valve, characterized in that: The invention comprises a valve body (1), wherein a rotating shaft (3) is fixedly installed inside the valve body (1), and a butterfly plate (2) is symmetrically connected to the outer periphery of the rotating shaft (3), and a fixed plate (4) is rotatably connected to the outer periphery of the rotating shaft (3) and fixedly installed to the butterfly plate (2). Protective components (5) for buffering the butterfly plate (2) are symmetrically arranged at both ends inside the valve body (1), and the protective components (5) include a sliding groove (51) uniformly surrounding the interior of the valve body (1), a sliding block (54) sliding inside the sliding groove (51), and a reset spring (53) fixedly installed inside the sliding groove (51) and fixedly installed with the sliding block (54). A connecting rod (55) is fixedly installed at one end of the sliding block (54), a rotating shaft (56) is fixedly installed at one end of the connecting rod (55), and one end of the rotating shaft (56) is rotatably connected to the limiting block 1 (57), and one end of the rotating shaft (56) is rotatably connected to the limiting block 2 (58). A buffer baffle (510) is provided at one end of the valve body (1), and a through hole (512) is evenly opened around one end of the buffer baffle (510) for the limiting block 1 (57) and the limiting block 2 (58) to pass through. A return spring (59) is fixedly installed on the outer periphery of the rotating shaft (56) and is fixedly installed with the limiting block 1 (57) and the limiting block 2 (58).

2. A stainless steel butterfly check valve according to claim 1, characterized in that: A telescopic guide rod (52) fixedly mounted on the sliding block (54) is fixedly mounted inside the sliding groove (51), and the telescopic guide rod (52) is sleeved inside the reset spring (53).

3. A stainless steel butterfly check valve according to claim 1, characterized in that: A groove (511) is provided on one end of the buffer baffle (510) close to the sliding block (54), and the groove (511) is evenly arranged around the end of the buffer baffle 510, and the through hole (512) is connected to the groove (511).

4. A stainless steel butterfly check valve according to claim 1, characterized in that: A filter baffle (513) is provided inside the valve body (1) and on one side of the buffer baffle (510) to reduce the wear of the butterfly plate (2) by solid particles in the water flow, and a through hole (512) is also uniformly provided around the outer periphery of the filter baffle (513) for the first limit block (57) and the second limit block (58) to pass through.

5. A stainless steel butterfly check valve according to claim 1, characterized in that: Connecting flanges (6) for installation are symmetrically fixed at both ends of the valve body (1).

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