Diaphragm liquid pump

Abstract

The utility model discloses a diaphragm liquid pump which comprises a pump body, a driving motor is installed at the bottom of one side of the pump body, a pump cover is installed on the top end face of the pump body, a water inlet and a water outlet are fixed to the top of the surface of one side of the pump body respectively, and connecting pipes are installed at the end of the water inlet and the end of the water outlet. Limiting assemblies are arranged on the surfaces of the ends of the water inlet and the water outlet. By means of the designed limiting assembly, the firmness of clamping connection between the connecting pipe and the metal buckle or the water outlet can be improved conveniently, limiting and fixing of the connecting pipe can be achieved, the connecting pipe is not prone to loosening and falling off in the using process, and the practical effect is good; according to the diaphragm liquid pump, through the designed sealing assembly, the sealing performance of installation and connection of the connecting pipe and the water inlet or the water outlet is conveniently improved, the situation of liquid leakage is not prone to occurring in the using process of the diaphragm liquid pump, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps, in particular to a diaphragm liquid pump. Background Art

[0002] The diaphragm type micro liquid pump is provided with circular motion by a motor, and then the diaphragm inside the liquid pump is made to do reciprocating motion through a mechanical device, thereby compressing and stretching the air in the pump chamber. Under the action of the one-way valve, a pressure difference is generated between the water outlet or the water inlet and the external atmospheric pressure. Under the action of the pressure difference, water is pressed into the water inlet and then discharged from the water outlet. This micro liquid pump has been well applied in small household appliances, medical equipment and other occasions. The existing diaphragm liquid pump has the problem that when in use, the connecting pipe and the water inlet or the water outlet are only connected by a simple snap-fit ​​connection, and the firmness of the snap-fit ​​is not high enough, which makes the connecting pipe easy to loosen and fall off. The practical effect is not good enough, and there is a certain room for improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a diaphragm liquid pump to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a diaphragm liquid pump, comprising a pump body, a driving motor is installed at the bottom of one side of the pump body, a pump cover is installed on the top surface of the pump body, a water inlet and a water outlet are respectively fixed on the top of one side surface of the pump body, connecting pipes are installed at the ends of the water inlet and the water outlet, and limiting components are arranged on the end surfaces of the water inlet and the water outlet.

[0005] The limiting assembly includes a fixing ring installed on the end surfaces of the water inlet and the water outlet, a limiting ring groove is provided on the inner surface of the fixing ring, an elastic ring is fixed at the opening of the limiting ring groove, a rubber ring is provided on the inner side of the fixing ring, the outer surface of the rubber ring is fixedly connected to the surface of the elastic ring, and a connecting ring groove for the inner side of the rubber ring to engage is provided on the outer surface of one end of the connecting pipe.

[0006] As a further preferred embodiment of the technical solution, a limiting plate is installed at an equal angle on the inner surface of the rubber ring, and the surface of the limiting plate is tightly fitted with the inner surface of the connecting ring groove.

[0007] As a further preferred embodiment of the present technical solution, the inner diameter of the rubber ring is smaller than the outer diameter of the end of the connecting pipe, and the thickness of the rubber ring is smaller than the width of the opening of the limiting ring groove.

[0008] As a further preferred embodiment of the present technical solution, both ends of the limiting piece are inclined, and the limiting piece is made of metal.

[0009] As a further preferred embodiment of the technical solution, a sealing assembly is provided on the inner surface of the end of the water inlet and the water outlet, and the sealing assembly includes an airbag ring provided on the inner side of the end of the water inlet and the water outlet, and a fixing ring groove for installing the airbag ring is provided on the inner surface of the end of the water inlet and the water outlet, and sealing rings are provided on the surface of the airbag ring at equal distances, and sealing ring grooves are provided on the outer surface of the end of the connecting pipe at equal distances, and the sealing ring is limitedly engaged with the inside of the sealing ring groove.

[0010] As a further preferred embodiment of the present technical solution, the outer surface of the airbag ring is bonded to the inner wall of the fixing ring groove, and the surface of the sealing ring is an arc surface.

[0011] The utility model provides a diaphragm liquid pump, which has the following beneficial effects:

[0012] 1. The utility model improves the firmness of the connection between the connecting pipe and the metal buckle or the water outlet through the designed limiting component, and can realize the limiting fixation of the connecting pipe, so that the connecting pipe is not easy to loosen and fall off during use, and the practical effect is better.

[0013] 2. The sealing assembly designed in the utility model is convenient for improving the sealing performance of the connection between the connecting pipe and the water inlet or the water outlet, so that the diaphragm liquid pump is not prone to liquid leakage during use, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation structure of the limit assembly and the sealing assembly in the utility model;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the middle A area;

[0017] Figure 4 for Figure 2 A magnified schematic diagram of the middle B area;

[0018] In the figure: 1. pump body; 2. drive motor; 3. pump cover; 4. water inlet; 5. water outlet; 6. connecting pipe; 7. fixing ring; 8. limiting ring groove; 9. elastic ring; 10. rubber ring; 11. limiting plate; 12. connecting ring groove; 13. airbag ring; 14. fixing ring groove; 15. sealing ring; 16. sealing ring groove. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the diaphragm liquid pump includes a pump body 1, a driving motor 2 is installed at the bottom of one side of the pump body 1, a pump cover 3 is installed on the top surface of the pump body 1, a water inlet 4 and a water outlet 5 are respectively fixed on the top of one side surface of the pump body 1, a connecting pipe 6 is installed at the end of the water inlet 4 and the water outlet 5, and a limiting component is arranged on the end surface of the water inlet 4 and the water outlet 5. The limiting component includes a fixing ring 7 installed on the end surface of the water inlet 4 and the water outlet 5, a limiting ring groove 8 is provided on the inner surface of the fixing ring 7, an elastic ring 9 is fixed at the opening of the limiting ring groove 8, a rubber ring 10 is arranged on the inner side of the fixing ring 7, and the outer surface of the rubber ring 10 is in contact with the elastic ring 9 The surface of the connecting pipe 6 is fixedly connected, and a connecting ring groove 12 for the inner side of the rubber ring 10 to engage is provided on the outer surface of one end of the connecting pipe 6. The inner diameter of the rubber ring 10 is smaller than the outer diameter of the end of the connecting pipe 6. The thickness of the rubber ring 10 is smaller than the width of the opening of the limiting ring groove 8. The inner surface of the rubber ring 10 is equiangularly installed with a limiting piece 11. The surface of the limiting piece 11 is tightly fitted with the inner surface of the connecting ring groove 12. The two ends of the limiting piece 11 are inclined. The limiting piece 11 is made of metal material, which is convenient for improving the firmness of the connection between the connecting pipe 6 and the water inlet 4 and the water outlet 5, so that the connecting pipe 6 is not easy to loosen and fall off during use, and the practical effect is good.

[0021] like Figure 2 and Figure 4 As shown, a sealing assembly is provided on the inner surface of the end of the water inlet 4 and the water outlet 5, and the sealing assembly includes an airbag ring 13 arranged on the inner side of the end of the water inlet 4 and the water outlet 5, and a fixing ring groove 14 for installing the airbag ring 13 is opened on the inner surface of the end of the water inlet 4 and the water outlet 5, and a sealing ring 15 is arranged on the surface of the airbag ring 13 at equal distances, and a sealing ring groove 16 is opened on the outer surface of the end of the connecting pipe 6 at equal distances, and the sealing ring 15 is limitedly engaged to the inside of the sealing ring groove 16, and the outer surface of the airbag ring 13 is bonded to the inner wall of the fixing ring groove 14, and the surface of the sealing ring 15 is an arc surface, which is convenient for improving the sealing performance of the connecting pipe 6 when it is installed and connected with the water inlet 4 and the water outlet 5, so that the diaphragm liquid pump will not leak liquid during operation, and the practicality is good.

[0022] The utility model provides a diaphragm liquid pump, and the specific working principle is as follows: when the utility model is installing and connecting the connecting pipe 6 with the water inlet 4, first align one end of the connecting pipe 6 with the opening of the water inlet 4, and then push the connecting pipe 6 to the inner side of the water inlet 4 to engage, at this time, the end surface of the connecting pipe 6 will contact the surface of the limiting plate 11, and the end of the connecting pipe 6 will generate an extrusion force on the limiting plate 11, at this time, the inner diameter of the rubber ring 10 will be expanded due to the extrusion, and the rubber ring 10 will generate an extrusion force on the elastic ring 9, so that the elastic ring 9 will be deformed and move to the inside of the limiting ring groove 8, at this time, the elastic ring 9 will generate a rebound force until one end of the connecting pipe 6 is limitedly engaged to the inner side of the water inlet 4, at this time, the rebound force generated by the elastic ring 9 will act on the rubber ring 10 , so that the rubber ring 10 can push the limiting piece 11 to engage with the inside of the connecting ring groove 12 on the surface of the connecting pipe 6, and make the surface of the limiting piece 11 fit tightly with the inside of the connecting ring groove 12, so that the connecting pipe 6 can be firmly engaged with the water inlet 4, and the connecting pipe 6 is not easy to loosen and fall off during the later use, and the practical effect is better; when the connecting pipe 6 is engaged and connected with the water inlet 4, the sealing ring 15 on the surface of the airbag ring 13 will be limited and engaged to the inside of the sealing ring groove 16 on the outer surface of the connecting pipe 6, and at the same time, the surface of the sealing ring 15 will be squeezed and fitted with the inner surface of the sealing ring groove 16, so that the sealing performance of the installation connection between the connecting pipe 6 and the water inlet 4 is improved, so that the diaphragm liquid pump is not prone to liquid leakage when in use, and the practical effect is better.

[0023] Although 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

1. A diaphragm liquid pump, comprising a pump body (1), a driving motor (2) being mounted on the bottom of one side of the pump body (1), a pump cover (3) being mounted on the top surface of the pump body (1), a water inlet (4) and a water outlet (5) being fixed on the top of one side of the surface of the pump body (1), and connecting pipes (6) being mounted on the ends of the water inlet (4) and the water outlet (5), characterized in that: The end surfaces of the water inlet (4) and the water outlet (5) are provided with limit position components; The limiting assembly comprises a fixing ring (7) mounted on the end surfaces of the water inlet (4) and the water outlet (5); a limiting ring groove (8) is provided on the inner surface of the fixing ring (7); an elastic ring (9) is fixed at the opening of the limiting ring groove (8); a rubber ring (10) is provided on the inner side of the fixing ring (7); the outer surface of the rubber ring (10) is fixedly connected to the surface of the elastic ring (9); and a connecting ring groove (12) for the inner side of the rubber ring (10) to engage is provided on the outer surface of one end of the connecting pipe (6).

2. The diaphragm liquid pump according to claim 1, characterized in that: A limiting plate (11) is installed at an equal angle on the inner surface of the rubber ring (10), and the surface of the limiting plate (11) is tightly fitted with the inner surface of the connecting ring groove (12).

3. The diaphragm liquid pump according to claim 1, characterized in that: The inner diameter of the rubber ring (10) is smaller than the outer diameter of the end of the connecting pipe (6), and the thickness of the rubber ring (10) is smaller than the width of the opening of the limiting ring groove (8).

4. The diaphragm liquid pump according to claim 2, characterized in that: The two ends of the limiting piece (11) are inclined, and the limiting piece (11) is made of metal.

5. The diaphragm liquid pump according to claim 1, characterized in that: The inner surfaces of the ends of the water inlet (4) and the water outlet (5) are provided with sealing components, and the sealing components include airbag rings (13) arranged on the inner sides of the ends of the water inlet (4) and the water outlet (5); the inner surfaces of the ends of the water inlet (4) and the water outlet (5) are provided with fixing ring grooves (14) for installing the airbag rings (13); sealing rings (15) are arranged at equal distances on the surface of the airbag ring (13); the outer surface of the end of the connecting pipe (6) is provided with sealing ring grooves (16) at equal distances; the sealing ring (15) is limitedly engaged with the inside of the sealing ring groove (16).

6. The diaphragm liquid pump according to claim 5, characterized in that: The outer surface of the airbag ring (13) is bonded to the inner wall of the fixed ring groove (14), and the surface of the sealing ring (15) is an arc surface.

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