CN221922124U - Check valve for hydraulic engineering - Google Patents

Abstract

The utility model discloses a check valve for water conservancy engineering in the technical field of check valves, comprising a valve body and a water inlet, wherein one end of the valve body is provided with a water inlet, a valve plate is provided on the inner side of the water inlet, a connecting rod is provided on one side of the valve plate, the connecting rod and the valve plate are fixedly connected, a first connecting piece is provided on the inner wall of the valve body, the connecting rod and the first connecting piece are rotatably connected, a second connecting piece is further provided on the inner wall of the valve body, the second connecting piece and the valve body are fixedly connected, a telescopic rod is provided on the inner side of the second connecting piece, the telescopic rod and the second connecting piece are rotatably connected, a spring is sleeved on the surface of the telescopic rod, the sealing performance of the check valve is improved by the valve plate, the connecting rod, the first connecting piece, the telescopic rod and the spring are provided, when the valve plate is flipped, the telescopic rod will be squeezed and the spring will be compressed at the same time, when the valve plate is closed, the telescopic rod will push the valve plate tightly under the reaction force of the spring, thereby improving the sealing performance.

Description

A check valve for water conservancy projects

Technical Field

The utility model belongs to the technical field of check valves, and in particular relates to a check valve for water conservancy projects.

Background Art

A check valve is a valve that has a circular disc as the opening and closing part and blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement of the disc is divided into lift type and swing type. The lift check valve is similar to the stop valve in structure, except that it lacks a valve stem to drive the disc. The medium enters the valve from the inlet (the swing check valve has a disc that is tilted and can rotate around the axis, and its working principle is similar to that of the lift check valve. Check valves are often used as bottom valves for pumping devices to prevent the backflow of water.

Existing check valves for water conservancy projects still have some defects. Most of them have poor sealing performance and mainly rely on the deadweight of the seal to achieve sealing, thereby preventing the medium from flowing back. Over time, the sealing performance may be reduced, resulting in water backflow, which is inconvenient to use. For this reason, we propose a check valve for water conservancy projects.

Utility Model Content

The utility model aims to provide a check valve for water conservancy projects to solve the problem of poor sealing performance in most of the above-mentioned background technologies.

In order to achieve the above purpose, the utility model provides the following technical solutions:

A check valve for water conservancy projects comprises a valve body and a water inlet, wherein the water inlet is arranged at one end of the valve body, a valve plate is arranged on the inner side of the water inlet, a connecting rod is arranged on one side of the valve plate, the connecting rod and the valve plate are fixedly connected, a first connecting piece is arranged on the inner wall of the valve body, the connecting rod and the first connecting piece are rotatably connected, a second connecting piece is also arranged on the inner wall of the valve body, the second connecting piece and the valve body are fixedly connected, a telescopic rod is arranged on the inner side of the second connecting piece, the telescopic rod and the second connecting piece are rotatably connected, and a spring is sleeved on the surface of the telescopic rod.

Preferably, a limit block is provided at one end of the telescopic rod, a third connecting piece is provided at one side of the valve plate, and the third connecting piece is rotatably connected to the telescopic rod.

Preferably, a sealing groove is provided on the inner side of the water inlet, a hinge is provided on one side of the valve plate, and the hinge and the valve plate are fixed by screws.

Preferably, a first flange is provided at one end of the water inlet, the first flange is fixedly connected to the water inlet, and a first fixing hole is provided on the surface of the first flange.

Preferably, a valve cover is provided on the top of the valve body, the valve cover and the valve body are fixed by screws, and a water outlet is provided at one end of the valve body.

Preferably, a second flange is provided at one end of the water outlet, and a second fixing hole is embedded in the surface of the second flange.

Compared with the prior art, the beneficial effects of the utility model are:

1. The sealing performance of the check valve is improved by means of the valve plate, the connecting rod, the first connecting member, the telescopic rod and the spring. When the valve plate is turned over, the telescopic rod will be squeezed and the spring will be compressed at the same time. When the valve plate is closed, the telescopic rod will push the valve plate tightly under the reaction force of the spring, thereby improving the sealing performance.

2. The sealing performance of the valve plate is improved by the provided sealing groove. When closed, the valve plate will be embedded in the sealing groove, and the structure is more stable. The water inlet pipe is fixed by the provided first flange and the first fixing hole.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 is a schematic diagram of the cross-sectional structure of the utility model;

FIG3 is an enlarged structural schematic diagram of part A in FIG2 of the present invention.

In the figure: 1. valve body; 2. water inlet; 3. valve plate; 4. connecting rod; 5. first connecting member; 6. telescopic rod; 7. spring; 8. second connecting member; 9. limit block; 10. third connecting member; 11. sealing groove; 12. hinge; 13. first flange; 14. first fixing hole; 15. valve cover; 16. water outlet; 17. second flange; 18. second fixing hole.

DETAILED DESCRIPTION

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

Please refer to Figures 1 to 3. A check valve for water conservancy projects includes a valve body 1 and a water inlet 2. The water inlet 2 is provided at one end of the valve body 1, and a valve plate 3 is provided on the inner side of the water inlet 2. A connecting rod 4 is provided on one side of the valve plate 3. The connecting rod 4 and the valve plate 3 are fixedly connected. A first connecting member 5 is provided on the inner wall of the valve body 1. The connecting rod 4 and the first connecting member 5 are rotatably connected. A second connecting member 8 is also provided on the inner wall of the valve body 1. The second connecting member 8 is fixedly connected to the valve body 1. A telescopic rod 6 is provided on the inner side of the second connecting member 8. The telescopic rod 6 and the second connecting member 8 are rotatably connected. A spring 7 is sleeved on the surface of the telescopic rod 6.

In this embodiment, when the check valve for water conservancy projects is used, water enters from the water inlet 2, and the valve plate 3 flips under the impact force of the water, thereby driving the telescopic rod 6 to contract, and then compressing the spring 7, and at the same time opening the channel of the valve body 1 to enable water to flow. When the water stops flowing, the valve plate 3 will seal the water inlet 2 under its own weight, and at the same time the telescopic rod 6 will rebound under the reaction force of the spring 7, pushing the valve plate 3 tight, thereby improving the sealing of the structure and making it more convenient to use.

Specifically, a limit block 9 is provided at one end of the telescopic rod 6, a third connecting member 10 is provided at one side of the valve plate 3, the third connecting member 10 and the telescopic rod 6 are rotatably connected, a sealing groove 11 is provided on the inner side of the water inlet 2, a hinge 12 is provided at one side of the valve plate 3, the hinge 12 and the valve plate 3 are fixed by screws, a first flange 13 is provided at one end of the water inlet 2, the first flange 13 and the water inlet 2 are fixedly connected, a first fixing hole 14 is provided on the surface of the first flange 13, a valve cover 15 is provided on the top of the valve body 1, the valve cover 15 and the valve body 1 are fixed by screws, a water outlet 16 is provided at one end of the valve body 1, a second flange 17 is provided at one end of the water outlet 16, and a second fixing hole 18 is embedded in the surface of the second flange 17.

In this embodiment, the limiting function of the spring 7 is achieved by the limit block 9, thereby improving the stability of the spring 7. The sealing groove 11 is provided to improve the sealing performance of the valve plate 3. When closed, it will be embedded in the sealing groove 11, and the structure is more stable. The water inlet pipe is fixed by the first flange 13 and the first fixing hole 14. The valve cover 15 provides convenience for the maintenance of the valve body 1. The water outlet pipe is fixed by the second flange 17 and the second fixing hole 18.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A check valve for a water conservancy project, comprising a valve body (1) and a water inlet (2), characterized in that: a water inlet (2) is provided at one end of the valve body (1), a valve plate (3) is provided on the inner side of the water inlet (2), a connecting rod (4) is provided on one side of the valve plate (3), the connecting rod (4) and the valve plate (3) are fixedly connected, a first connecting member (5) is provided on the inner wall of the valve body (1), the connecting rod (4) and the first connecting member (5) are rotatably connected, a second connecting member (8) is further provided on the inner wall of the valve body (1), the second connecting member (8) and the valve body (1) are fixedly connected, a telescopic rod (6) is provided on the inner side of the second connecting member (8), the telescopic rod (6) and the second connecting member (8) are rotatably connected, and a spring (7) is sleeved on the surface of the telescopic rod (6). 2. A check valve for water conservancy projects according to claim 1, characterized in that: a limit block (9) is provided at one end of the telescopic rod (6), a third connecting piece (10) is provided at one side of the valve plate (3), and the third connecting piece (10) and the telescopic rod (6) are rotatably connected. 3. A check valve for water conservancy projects according to claim 1, characterized in that: a sealing groove (11) is provided on the inner side of the water inlet (2), a hinge (12) is provided on one side of the valve plate (3), and the hinge (12) and the valve plate (3) are fixed by screws. 4. A check valve for water conservancy projects according to claim 1, characterized in that: a first flange (13) is provided at one end of the water inlet (2), the first flange (13) and the water inlet (2) are fixedly connected, and a first fixing hole (14) is provided on the surface of the first flange (13). 5. A check valve for water conservancy projects according to claim 1, characterized in that a valve cover (15) is provided on the top of the valve body (1), the valve cover (15) and the valve body (1) are fixed by screws, and a water outlet (16) is provided at one end of the valve body (1). 6. A check valve for water conservancy projects according to claim 5, characterized in that a second flange (17) is provided at one end of the water outlet (16), and a second fixing hole (18) is embedded in the surface of the second flange (17).