Check valve for water inlet of water pump

Abstract

The utility model relates to the technical field of water pump check valves, and provides a water pump water inlet check valve which comprises a water pump water inlet portion, the water inlet end of the water pump water inlet portion is rotationally connected with a water inlet connector, and a check structure is arranged on the inner side of the water pump water inlet portion close to the water inlet connector. The non-return structure comprises a sunken groove formed in the position, close to the water inlet connector, of the inner side of the water inlet part of the water pump, a shaft rod is arranged on the inner side of the sunken groove, a non-return plate is fixedly connected to the outer surface of the shaft rod, and a sealing gasket is movably connected to the position, corresponding to the non-return plate, of the inner side of the water inlet connector. The two ends of the shaft rod are embedded into the inner wall of the water pump water inlet part, and the shaft rod is rotationally connected with the water pump water inlet part. By means of the technical scheme, the problems that after water flows into a water inlet of an existing water pump, when the water pump is closed, a certain reverse flow phenomenon can be generated, water needs to be injected into the pump after one-time use water flows back and before the pump is started next time, and operation is complex are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of water pump check valve technology, specifically to a water pump inlet check valve. Background Technology

[0002] A water pump is a machine used to transport liquids and is also used to pressurize in some scenarios. After the water pump is used, some of the water flows back into the inlet pipe inside the pump, which can easily affect the performance of the water pump.

[0003] A search revealed an anti-backflow automatic self-priming water purifier pump with authorization announcement number CN207879628U. This utility model features a reasonable structural design and strong self-priming capability. By incorporating a fine filament filter, ultraviolet lamp, aerator, and activated carbon filter, it effectively improves water quality. It effectively prevents the machine from operating when there is no water, thus avoiding damage. Furthermore, it effectively prevents backflow of water in the pipe after pumping stops, which would result in incomplete water extraction and facilitates construction.

[0004] However, the existing water pump inlet will experience a backflow phenomenon after water enters and the pump is shut off, which may affect the next start-up of the pump. Therefore, we propose a water pump inlet check valve. Utility Model Content

[0005] This utility model proposes a water pump inlet check valve, which solves the problem mentioned in the background art that when water enters the inlet of an existing water pump and the pump is turned off, a certain backflow phenomenon will occur, which can easily affect the next start-up of the water pump or cause incomplete pumping due to backflow.

[0006] The technical solution of this utility model is as follows:

[0007] A water pump inlet check valve includes a water pump inlet section, with an inlet connector rotatably connected to the inlet end of the water pump inlet section. A check structure is provided on the inner side of the water pump inlet section near the inlet connector. The check structure includes a recessed groove formed on the inner side of the water pump inlet section near the inlet connector. A shaft is provided on the inner side of the recessed groove. A check plate is fixedly connected to the outer surface of the shaft. A sealing gasket is movably connected to the inner side of the inlet connector corresponding to the check plate.

[0008] As a further technical solution of this utility model, the two ends of the shaft are embedded in the inner wall of the water pump inlet, and the shaft and the water pump inlet are rotatably connected. The shaft is located on the inner side of the water pump inlet, near the upper end of the inner opening of the inlet connector. The check plate is a cylindrical thin sheet structure.

[0009] As a further technical solution of this utility model, the sealing gasket is annular, and the diameter of the check plate is larger than the inner diameter of the sealing gasket and smaller than the outer diameter of the sealing gasket. The sealing of the internal opening of the water inlet connector is achieved by the check plate and the sealing gasket being attached together.

[0010] As a further technical solution of this utility model, an inclined chamfer is provided on the inner side of the water pump inlet near the upper end of the inner side of the check plate to provide the check plate with room to rotate inward.

[0011] The working principle and beneficial effects of this utility model are as follows:

[0012] This invention utilizes a check valve structure to prevent backflow of pumped water after the pump has finished running, eliminating the need to add water to the pump the next time it starts, thus simplifying operation. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0015] Figure 2 This is a partial structural diagram showing the cross-section of the check valve structure of this utility model.

[0016] Figure 3 This utility model Figure 1 A partial front view;

[0017] Figure 4 This utility model Figure 1 A partial front view during use.

[0018] In the diagram: 1. Water pump inlet; 2. Inlet connector; 3. Check valve; 31. Recessed groove; 32. Shaft; 33. Check valve plate; 34. Sealing gasket. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0020] like Figures 1-3As shown, this embodiment proposes a water pump inlet check valve, including a water pump inlet part 1, with an inlet connector 2 rotatably connected to the inlet end of the water pump inlet part 1. A check structure 3 is provided on the inner side of the water pump inlet part 1 near the inlet connector 2. The check structure 3 includes a recessed groove 31 opened on the inner side of the water pump inlet part 1 near the inlet connector 2. A shaft 32 is provided on the inner side of the recessed groove 31. A check plate 33 is fixedly connected to the outer surface of the shaft 32. A sealing gasket 34 is movably connected to the inner side of the inlet connector 2 corresponding to the check plate 33.

[0021] The two ends of the shaft 32 are embedded in the inner wall of the water pump inlet 1, and the shaft 32 and the water pump inlet 1 are rotatably connected. The shaft 32 is located on the inner side of the water pump inlet 1 near the upper end of the inner opening of the inlet connector 2. The check plate 33 is a cylindrical thin sheet structure. The sealing gasket 34 is annular, and the diameter of the check plate 33 is larger than the inner diameter of the sealing gasket 34 and smaller than the outer diameter of the sealing gasket 34. The sealing of the inner opening of the inlet connector 2 is achieved by the fit between the check plate 33 and the sealing gasket 34. An inclined chamfer is provided on the inner side of the water pump inlet 1 near the upper end of the inner side of the check plate 33 to provide the check plate 33 with room to rotate inward.

[0022] In this embodiment, during use, the pumped water flow can be prevented from flowing back after the pump has finished running, allowing the pumped water flow to be more thorough and leaving no residual water. At the same time, backflow will not cause adverse effects on the internal components of the pump.

[0023] In summary, during operation, the pumped water flows into the water inlet section 1 of the water pump through the opening of the inlet connector 2 and exits through the outlet of the water pump. During this process, the water flow first impacts the outer side of the check plate 33, causing the check plate 33 to drive the shaft 32 to rotate inside the recessed groove 31. At this time, the check plate 33 separates from the sealing gasket 34 and tilts inward. In this state, the interior of the inlet connector 2 is connected to the interior of the water pump inlet section 1, thereby maintaining the stability of the water pump's pumping. When the water pump stops operating, the water flow flows back to the opening of the inlet connector 2. At this time, the water flow first impacts the inner side of the check plate 33. Under the impact of the water flow, the check plate 33 rotates around the shaft 32 to a state of contact with the sealing gasket 34. At this time, the inlet connector 2 is not connected to the interior of the water pump inlet section 1, thus achieving the effect of preventing backflow.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A water pump suction check valve comprising a water pump suction portion (1), characterized in that, The water inlet end of the water pump water inlet part (1) is rotationally connected with a water inlet connector (2), the inner side of the water pump water inlet part (1) is provided with a check structure (3) near the water inlet connector (2), the check structure (3) comprises a recessed groove (31) which is arranged on the inner side of the water pump water inlet part (1) near the water inlet connector (2), the inner side of the recessed groove (31) is provided with a shaft rod (32), the outer surface of the shaft rod (32) is fixedly connected with a check plate (33), and the inner side of the water inlet connector (2) is movably connected with a sealing gasket (34) corresponding to the check plate (33).

2. The water pump inlet check valve of claim 1, wherein, Both ends of the shaft rod (32) are embedded in the inner wall of the water pump water inlet part (1), and the shaft rod (32) is rotationally connected with the water pump water inlet part (1), the shaft rod (32) is located on the inner side of the water pump water inlet part (1) near the inner side opening upper end of the water inlet connector (2), and the check plate (33) is a cylindrical sheet structure.

3. The water pump inlet check valve of claim 2, wherein, The sealing gasket (34) is a circular ring, the diameter of the check plate (33) is greater than the inner diameter of the sealing gasket (34) and less than the outer diameter of the sealing gasket (34), and the check plate (33) is combined with the sealing gasket (34) to realize the closure of the inner opening of the water inlet connector (2).

4. The water pump inlet check valve of claim 3, wherein, The inner side of the water pump water inlet part (1) is provided with an inclined chamfer near the inner side upper end of the check plate (33), which provides a rotating space for the check plate (33) to rotate inward.

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