Inclined plate check valve capable of switching cut-off modes

Abstract

The utility model discloses an inclined plate check valve capable of switching cut-off modes, and relates to the technical field of valves, the inclined plate check valve comprises a valve body, a valve plate and a valve shaft, a medium channel is arranged in the valve body, the medium channel comprises a water inlet and a water outlet, an inclined sealing boss is arranged in the medium channel, the sealing boss and the valve plate form a sealing structure, and the valve shaft is arranged in the valve body. One end of the valve shaft is hinged to the valve plate, the other end of the valve shaft extends out of the valve body, the portion, extending out of the valve body, of the valve shaft is of a telescopic rod structure and comprises an inner rod and an outer rod, the outer rod can transversely move in a telescopic mode along the outer side of the inner rod, a locking protrusion is arranged on the surface of the outer rod, and the valve body is provided with a locking part matched with the locking protrusion. And the locking part is provided with a locking hole which is in limiting fit with the locking bulge. The check valve can realize check at ordinary times by adopting one valve, is convenient to stop and switch during maintenance, occupies a small space, and is convenient to use and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an inclined plate check valve capable of switching cut-off modes. Background Art

[0002] A check valve is a valve that opens or closes automatically by the flow and force of the medium to prevent the medium from flowing back. It belongs to the automatic valve category and is mainly used in pipes where the medium flows in one direction. It only allows the medium to flow in one direction to prevent accidents. In municipal pipe network systems such as water supply and drainage, fire protection, and sewage treatment, in order to prevent the medium from flowing back and for maintenance needs, a stop valve or gate valve is generally installed at the outlet of the water pump to cut off the medium during maintenance, and then a check valve is installed to prevent the water hammer caused by the medium flowing back from damaging the equipment. Using two valves has the problems of occupying a large space, being inconvenient to install, and being inconvenient to use and maintain. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an inclined plate check valve capable of switching a cut-off mode.

[0004] The technical solution provided by the utility model is:

[0005] A switchable cut-off mode inclined plate check valve comprises a valve body, a valve plate and a valve shaft, wherein a medium channel is arranged in the valve body, the medium channel comprises a water inlet and a water outlet, an inclined sealing boss is arranged in the medium channel, the sealing boss and the valve plate form a sealing structure, one end of the valve shaft is hinged to the valve plate, and the other end extends out of the valve body, the part of the valve shaft extending out of the valve body is a telescopic rod structure, comprising an inner rod and an outer rod, the outer rod can be telescopically moved laterally along the outer side of the inner rod, a locking protrusion is arranged on the surface of the outer rod, the valve body is provided with a locking portion cooperating with the locking protrusion, and the locking portion is provided with a locking hole which forms a limit cooperation with the locking protrusion.

[0006] The valve plate is arc-shaped near the water inlet.

[0007] The center of gravity of the valve plate is offset from the center of rotation of the valve shaft.

[0008] The valve plate is provided with a limiting protrusion near the water outlet, and a limiting boss is provided in the medium channel corresponding to the limiting protrusion.

[0009] The two ends of the valve shaft located inside the valve body are fixed by screw plugs, and an O-ring is provided near the side extending outward from the valve body.

[0010] The portion of the valve shaft outside the valve body is provided with a dial and an indicator needle for marking the rotation angle of the valve shaft.

[0011] A lifting ring is arranged on the valve body.

[0012] The beneficial effects of the utility model are as follows: the utility model sets the part of the valve shaft extending out of the valve body as a telescopic rod structure, sets a locking protrusion on the surface of the outer rod, sets a locking part matching with the locking protrusion on the valve body, and sets a locking hole matching with the locking protrusion to form a limit position on the locking part. When installed in the pipeline, the locking protrusion is not limited to the locking hole, and the valve has a check function. When maintenance is required, the outer rod is telescopically moved to limit the locking protrusion to the locking hole, the valve shaft can no longer rotate, and the valve has a cut-off function. One valve can be used to achieve normal check and cut-off during maintenance. The switch is convenient, the space occupied is small, and the use and maintenance are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0014] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0015] Figure 3 It is a schematic diagram of the valve shaft scale plate of the embodiment of the utility model. DETAILED DESCRIPTION

[0016] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0017] like Figure 1-3 As shown, a switchable cut-off mode inclined plate check valve comprises a valve body 1, a valve plate 2 and a valve shaft 3. A lifting ring 14 is provided on the valve body 1 to provide support when the valve is installed in a pipeline. A medium channel is provided in the installation valve body 1. The medium channel comprises a water inlet 31 and a water outlet 32. An inclined sealing boss 21 is provided in the medium channel. The sealing boss 21 and the valve plate 2 form a sealing structure. One end of the valve shaft 3 is hinged to the valve plate 2, and the other end extends out of the valve body 1. The two ends of the valve shaft 3 located inside the valve body are fixed by screw plugs 4, and an O-ring 6 is provided near the side extending out of the valve body to prevent the medium from leaking from the fitting between the valve shaft 3 and the valve body 1. The part of the valve shaft 3 extending out of the valve body is a telescopic rod structure, including an inner rod 7 and an outer rod 8. The outer rod 8 can be telescopically moved laterally along the outer side of the inner rod 7. A locking protrusion 9 is provided on the surface of the outer rod 8. The valve body 1 is provided with a locking portion 10 that cooperates with the locking protrusion 9. The locking portion 10 is provided with a locking hole 11 that forms a limit fit with the locking protrusion.

[0018] When the valve is installed in the pipeline, in the initial state, the locking protrusion 9 is not limited to the locking hole 11, and the valve plays a check function to prevent water hammer caused by medium backflow from damaging the equipment; when maintenance is required, the outer rod 8 is laterally telescopically moved to limit the locking protrusion 9 to the locking hole 11. Due to the limiting effect of the locking hole 11, the valve shaft 3 can no longer rotate, and the valve plays a cut-off role. One valve can be used to achieve normal check and cut-off during maintenance, which is convenient to switch, occupies little space, and is easy to use and maintain.

[0019] In this embodiment, the valve plate 2 is arc-shaped near the water inlet side, so that the medium is more concentrated when the medium impacts the valve plate 2, which facilitates the opening of the valve; the center of gravity position of the valve plate 2 is offset from the rotation center position of the valve shaft 3, and the center of gravity of the valve plate 2 is on the side that is conducive to the closing of the valve plate 2, which can ensure that the valve plate 2 can gradually contact the valve seat by its own gravity even without the action of the medium, so as to achieve impact-free and noise-free operation; a limiting protrusion 22 is provided on the valve plate 2 near the water outlet side, and a limiting boss 13 is provided in the medium channel corresponding to the limiting protrusion 22 to prevent the valve plate 2 from over-opening when the medium impact is too large, causing damage to the valve.

[0020] In this embodiment, the part of the valve shaft 3 located outside the valve body is provided with a dial 12 and an indicator needle 23 for marking the rotation angle of the valve shaft. By observing the rotation angle of the valve shaft 3, the rotation angle of the valve plate 2 can be judged to determine whether the product is damaged, which facilitates mode switching and maintenance.

[0021] The embodiments should not be regarded as limiting the present invention, and any non-creative improvements made based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.

Claims

1. A switchable cut-off mode inclined plate check valve, comprising a valve body, a valve plate, and a valve shaft, wherein a medium channel is provided in the valve body, the medium channel comprises a water inlet and a water outlet, an inclined sealing boss is provided in the medium channel, the sealing boss and the valve plate form a sealing structure, one end of the valve shaft is hinged to the valve plate, and the other end extends out of the valve body, characterized in that: The part of the valve shaft extending out of the valve body is a telescopic rod structure, including an inner rod and an outer rod. The outer rod can be telescopically moved laterally along the outer side of the inner rod. A locking protrusion is provided on the surface of the outer rod. The valve body is provided with a locking part that cooperates with the locking protrusion. The locking part is provided with a locking hole that cooperates with the locking protrusion to form a limit position.

2. A switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: The valve plate is arc-shaped near the water inlet.

3. The switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: The center of gravity of the valve plate is offset from the center of rotation of the valve shaft.

4. The switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: The valve plate is provided with a limiting protrusion near the water outlet, and a limiting boss is provided in the medium channel corresponding to the limiting protrusion.

5. The switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: The two ends of the valve shaft located inside the valve body are fixed by screw plugs, and an O-ring is provided near the side extending outward from the valve body.

6. The switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: The portion of the valve shaft outside the valve body is provided with a dial and an indicator needle for marking the rotation angle of the valve shaft.

7. The switchable cut-off mode inclined plate check valve according to claim 1, characterized in that: A lifting ring is arranged on the valve body.

Images