Water pump non-return device

Abstract

The utility model belongs to the technical field of water pumps, and particularly relates to a water pump non-return device which comprises a pump shell, a water inlet cavity and a booster cavity are arranged in the pump shell, and a backflow cavity is arranged between the water inlet cavity and the booster cavity. An elastic piece is movably arranged in the backflow cavity, a first soft rubber part is arranged on the elastic piece, a backflow hole communicated with the backflow cavity and the water inlet cavity is formed in the pump shell, and a second soft rubber part used for making contact with the first soft rubber part is arranged outside the backflow hole; the elastic piece is used for deforming when the pressure in the backflow cavity changes, so that the first soft rubber part blocks the backflow hole and makes contact with the second soft rubber part. The non-return function of the water pump is automatically achieved through the structure of the elastic piece, the overall size of the water pump is greatly reduced, the needed installation size of the water pump is reduced, the size of the water pump is reduced, the elastic piece and the backflow hole are provided with the first soft rubber part and the second soft rubber part, and noise generated when the elastic piece works is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water pump technical field, especially a water pump check device. BACKGROUND

[0002] Chinese utility model 2018200349571 discloses a kind of water pump with check valve structure, including pump body, the water outlet of pump body is equipped with check valve, check valve head is slippage cooperation in the sliding slot of pump body water outlet side wall, check valve head is fixed with sealing gasket, sealing gasket has radially extended elastic sealing lip, and elastic sealing lip is cooperated in sliding slot.The check device in the patent overall structure is complex, affect the overall volume of water pump, and make water pump pump shell need to increase some structures suitable for check device, lead to more complex pump shell structure. SUMMARY

[0003] The utility model aims at providing a kind of water pump check device.

[0004] The utility model aims at being realized as follows:

[0005] A kind of water pump check device, including pump shell, water inlet cavity and booster chamber are equipped in pump shell, and backflow cavity is equipped between water inlet cavity and booster chamber;The elastic sheet is movably arranged in the backflow cavity, the first soft rubber part is arranged on the elastic sheet, the backflow hole that communicates backflow cavity and water inlet cavity is arranged on the pump shell, and the second soft rubber part for being in contact with the first soft rubber part is arranged outside the backflow hole;

[0006] The elastic sheet is used for deforming when the pressure in the backflow cavity changes, to make the first soft rubber part block on the backflow hole and contact with the second soft rubber part.

[0007] Further, two clamping parts are provided in the backflow cavity, the clamping groove is arranged in the clamping part, and the two ends of the elastic sheet are located in two clamping grooves respectively;The sealing plate that seals the clamping groove is further arranged on the clamping part.

[0008] Further, the clamping part includes two clamping columns, and the clamping groove is formed between the clamping columns;Fastening hole for connecting the sealing plate is further arranged on the clamping column.

[0009] Further, the first soft rubber part is connected with the sealing plate, when the sealing plate is fixed on the clamping part, the soft rubber part is located on the backflow hole.

[0010] Further, the extension is arranged below the sealing plate, the mounting hole is arranged on the extension, and the second soft rubber part is mounted in the mounting hole.

[0011] Further, positioning groove is arranged on both sides of the mounting hole, and positioning column, inserted into the positioning groove, is further arranged on the second soft rubber part.

[0012] Further, the water inlet cavity is provided with a plurality of support edges, and a mounting groove is formed between two support edges; the clamping portion is fixed in the mounting groove, and the elastic sheet is fixed in the clamping portion and the movement space of the elastic sheet is limited by the support edges.

[0013] Further, the two clamping portions clamp the elastic sheet and make the middle part of the elastic sheet bend away from the reflux hole.

[0014] Further, the housing is further provided with a limiting seat opposite to the reflux hole, the elastic sheet is located between the limiting seat and the reflux hole, and the limiting seat is used for limiting the maximum bending angle of the elastic sheet.

[0015] The utility model has the following prominent and beneficial technical effects compared with the prior art:

[0016] The utility model discloses the structure of the elastic sheet is used to realize the check function of the water pump automatically, and the overall volume is greatly reduced, and the installation volume required is reduced, so that the water pump volume is reduced, and the first soft glue part and the second soft glue part are arranged on the elastic sheet and the reflux hole, and the noise generated when the elastic sheet works is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the cross section schematic view of the water pump of the utility model.

[0018] Figure 2 It is Figure 1 The enlarged view of A in the figure.

[0019] Figure 3 It is the structure schematic view of the check device.

[0020] Figure 4 It is the structure schematic view after the sealing plate is disassembled.

[0021] Figure 5 It is the explosion schematic view of the sealing plate and the elastic sheet.

[0022] The meaning of the reference numeral in the figure is as follows:

[0023] 1, pump housing;11, water inlet cavity;12, booster cavity;13, reflux cavity;14, reflux hole;15, support edge;16, limiting seat;17, flow channel portion;2, elastic sheet;21, first soft glue part;31, clamping portion;311, clamping column;312, fastening hole;32, clamping groove;33, sealing plate;331, extension part;332, mounting hole;333, positioning groove;4, second soft glue part;41, positioning column;5, multistage impeller; DETAILED DESCRIPTION

[0024] The utility model will be described further in the following combined with specific embodiment:

[0025] A water pump check device, comprising a pump shell 1, a water inlet cavity 11 and a booster cavity 12 are arranged in the pump shell 1, a backflow cavity 13 is arranged between the water inlet cavity 11 and the booster cavity 12; the backflow cavity 13 movably arranged with a spring sheet 2, the pump shell 1 is provided with a backflow hole 14 connecting the backflow cavity 13 and the water inlet cavity 11, the backflow hole 14 and the spring sheet 2 are respectively provided with a first soft rubber part 21 and a second soft rubber part 4, when the spring sheet 2 moves due to the pressure change of the backflow cavity 13, the first soft rubber part 21 and the second soft rubber part 4 are in contact, and the first soft rubber part 21 blocks the backflow hole 14.

[0026] As shown in Figure 1 The check device of the patent is used in a water pump, the water pump in the patent is a multi-stage impeller 5 pump, the inside of the pump shell 1 is separated into multiple cavities during casting, that is, the above-mentioned connected water inlet cavity 11, booster cavity 12 and backflow cavity 13, the water inlet cavity 11 is connected with a water inlet, the booster cavity 12 is connected with a water outlet, and a multi-stage impeller 5 for realizing water suction work of the water pump is arranged in the booster cavity 12; the backflow cavity 13 is located below the pump shell 1 and is connected between the booster cavity 12 and the water outlet cavity, and is used for backflow.

[0027] As shown in Figures 2-4 The center of the pump shell 1 is provided with a raised flow channel part 17, the water inlet cavity 11 is formed in the flow channel part 17, the booster cavity 12 and the backflow cavity 13 are outside the flow channel part 17, the backflow hole 14 is arranged at one end of the flow channel part 17, and the backflow cavity 13 and the water inlet cavity 11 in the flow channel part 17 are connected through the backflow hole 14.

[0028] The spring sheet 2 is arranged outside one end of the flow channel part 17. As shown in Figures 3-5 The single sheet in the patent is made of metal material, and a square-shaped second soft rubber part 4 is adhered and fixed at the center position. Two clamping parts 31 are arranged left and right in the backflow cavity 13, the clamping part 31 is provided with a clamping groove 32 for accommodating one end of the spring sheet 2, and the clamping part 31 further comprises a sealing plate 33 for sealing the clamping groove 32.

[0029] As shown in detail Figure 4 The clamping part 31 comprises two clamping columns 311, the clamping column 311 is integrally formed on the pump shell 1, four clamping columns 311 are arranged on the two clamping parts 31, the clamping columns 311 correspond to each other, the clamping groove 32 is formed between the corresponding clamping columns 311, the size of the clamping groove 32 is matched with the thickness of the spring sheet 2, and the end of the spring sheet 2 is clamped in the clamping groove 32 to realize positioning.

[0030] The clamping post 311 has a fastening hole 312 formed in it for connecting with the sealing plate 33. The sealing plate 33 is strip-shaped and is placed horizontally above the two clamping parts 31. The sealing plate 33 is provided with a fastening hole 312 corresponding to the clamping post 311. The sealing plate 33 is fixed to the clamping post 311 by setting fasteners in the fastening hole 312, thereby preventing the spring piece 2 in the clamping groove 32 from falling off.

[0031] In this embodiment, to reduce the installation difficulty of the first soft rubber part 21, the first soft rubber part 21 is fixed under the sealing plate 33. When the sealing plate 33 is fixed on the clamping part 31, the soft rubber part is located on the return hole 14. Figure 5 As shown, the sealing plate 33 has an extension 331 at its lower part, and an installation hole 332 on the extension 331. The second soft rubber part 4 is embedded in the installation hole 332. Moreover, positioning grooves 333 are provided on both sides of the installation hole 332. The second soft rubber part 4 is also provided with a positioning post 41 that is inserted into the positioning groove 333. The positioning post 41 is integrally formed with the second soft rubber part 4 and can be directly inserted into the installation groove when the second soft rubber part 4 is installed.

[0032] During operation, the multi-stage impeller 5 causes pressure changes within the pump casing 1. When the pressure is too high, the spring plate 2 moves towards the return port, blocking it and reducing the return water volume to alleviate the pressure. Conversely, when the pressure is too low, the spring plate 2 moves outward from the return port, opening it. The multi-stage impeller 5 then continuously pumps water from the return port into the inlet chamber 11, and from the inlet chamber 11 into the booster chamber 12, thus ensuring the pump's power.

[0033] This patent uses the structure of the spring piece 2 to automatically realize the check function of the water pump, which greatly reduces its overall volume and the required installation volume, thereby reducing the volume of the water pump. In addition, the spring piece 2 and the return hole 14 are provided with a first soft rubber part 21 and a second soft rubber part 4, which reduces the noise generated by the spring piece 2 when it is working.

[0034] In this patent, the distance between the two clamping parts 31 is less than the length of the spring piece 2. When the spring piece 2 is fixed in the clamping part 31, the two clamping parts 31 clamp the spring piece 2 and bend the middle part of the spring piece 2 away from the return hole 14, which can adapt to the shape of the flow channel part 17. The spring piece 2 in the bent state moves more obviously after being subjected to force, thereby increasing the stability of the spring piece 2 in operation.

[0035] Furthermore, the water inlet cavity 11 is provided with several supporting ridges 15, and an installation groove is formed between two supporting ridges 15; the clamping part 31 is fixed in the installation groove, and the spring piece 2 is fixed in the clamping part 31 and its movement space and maximum unfolding angle are limited by the supporting ridges 15.Figure 4 As shown, the support ribs 15 are integrally formed in the pump shell 1, and a fan-shaped area is formed between the two support ribs 15, in which the clamping portion 31 and the elastic sheet 2 are arranged.

[0036] Further, a limiting seat 16 is arranged in the shell, and the limiting seat 16 is arranged opposite to the backflow hole 14, the elastic sheet 2 is located between the limiting seat 16 and the backflow hole 14, and the limiting seat 16 is used for limiting the maximum bending angle of the elastic sheet 2. Figures 2-4 As shown, the limiting seat 16 is a square seat body integrally formed in the pump shell 1, and the limiting seat 16 corresponds to the first soft rubber portion 21 on the elastic sheet 2, and is used for abutting against the elastic sheet 2 when the elastic sheet 2 is bent outward.

[0037] The above embodiment is only a preferred embodiment of the present application, and does not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

[0038] It should be understood that the structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation range of the present application.

[0039] It should be further noted that when an element is referred to as "fixed to" or "arranged on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element through a middle element.

[0040] In addition, the descriptions in the present application involving "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist, nor within the protection scope required by the present application.

Claims

1. A water pump check valve, characterized in that: The pump housing (1) includes an inlet chamber (11) and a booster chamber (12) in the pump housing (1), and a return chamber (13) is provided between the inlet chamber (11) and the booster chamber (12); a spring piece (2) is movably provided in the return chamber (13), and a first soft rubber part (21) is provided on the spring piece (2); a return hole (14) is provided on the pump housing (1) to connect the return chamber (13) and the inlet chamber (11), and a second soft rubber part (4) is provided outside the return hole (14) for contacting the first soft rubber part (21); The spring (2) is used to deform when the pressure in the reflux chamber (13) changes, so that the first soft rubber part (21) seals the reflux hole (14) and contacts the second soft rubber part (4).

2. The water pump check device according to claim 1, characterized in that: The return cavity (13) is provided with two clamping parts (31), and the clamping parts (31) are provided with clamping grooves (32). The two ends of the spring piece (2) are respectively located in the two clamping grooves (32); the clamping parts (31) are also provided with sealing plates (33) to close the clamping grooves (32).

3. A water pump check device according to claim 2, characterized in that: The clamping part (31) includes two clamping posts (311), and the clamping groove (32) is formed between the clamping posts (311); the clamping posts (311) are also provided with fastening holes (312) for connecting the sealing plate (33).

4. A water pump check device according to claim 2, characterized in that: The first soft rubber part (21) is connected to the lower part of the sealing plate (33). When the sealing plate (33) is fixed on the clamping part (31), the soft rubber part is located on the return hole (14).

5. A water pump check device according to claim 4, characterized in that: The sealing plate (33) has an extension (331) below it, and the extension (331) has a mounting hole (332) on it. The second soft rubber part (4) is installed in the mounting hole (332).

6. A water pump check device according to claim 5, characterized in that: The mounting hole (332) is provided with positioning grooves (333) on both sides, and the second soft rubber part (4) is also provided with positioning pins (41) inserted into the positioning grooves (333).

7. A water pump check device according to claim 4, characterized in that: The water inlet cavity (11) is provided with a plurality of support ribs (15), and an installation groove is formed between two support ribs (15); the clamping part (31) is fixed in the installation groove, and the spring piece (2) is fixed in the clamping part (31) and the movement space of the spring piece (2) is restricted by the support ribs (15).

8. A water pump check device according to claim 2, characterized in that: The two clamping parts (31) clamp the spring piece (2) and bend the middle part of the spring piece (2) away from the return hole (14).

9. A water pump check device according to claim 1, characterized in that: The housing is also provided with a limiting seat (16), which is arranged opposite to the return hole (14). The spring piece (2) is located between the limiting seat (16) and the return hole (14). The limiting seat (16) is used to limit the maximum bending angle of the spring piece (2).

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