Anti-leakage piston pump structure of supports with different diameters

Abstract

The utility model relates to the technical field of piston pumps, and discloses an anti-leakage piston pump structure of supports with different diameters, which comprises a shell, and a pump cover assembly is arranged at the end part of the shell and is used for installing a one-way valve assembly; a motor assembly is installed at the bottom of the shell and used for driving the pump body to operate. The pump cover assembly comprises a pump cover and small sealing rings, the pump cover is provided with a water inlet pipe opening and a water outlet pipe opening, and the water inlet pipe opening and the water outlet pipe opening are sleeved with the two sealing rings respectively. The one-way valve assembly comprises a large O-shaped ring, a non-equal-diameter support, a small O-shaped ring and a fan-shaped valve. Wherein a large O-shaped ring is sleeved on a large port of the support with the different diameters, a small O-shaped ring is sleeved on a small port of the support with the different diameters, and a fan-shaped valve is arranged in the support with the different diameters. In the upward mounting process of the motor, the stud close to the pump cover does not affect the mounting; the mounted bracket can be fool-proof and cannot be mounted reversely; a leakage-proof measure is arranged, so that the safety of the motor is protected; the overall structure is simple, and cost is not increased additionally.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pumps, and in particular relates to a leakage-proof piston pump structure of non-uniform diameter brackets. Background Art

[0002] A very important electrical component on the automatic delivery module is the piston pump, which is an important component for extracting and delivering liquids. The piston pump is composed of a piston rod with a sealing ring inside. Driven by the motor, it forms a volume difference in the inner cavity and cooperates with a one-way mechanism to achieve the liquid delivery function. However, the sealing effect of the sealing ring may cause water leakage and seepage due to assembly, foreign matter, aging and other reasons. These liquids will flow along the gap to the motor below, which can easily cause the shaft and the shell to rust and stop rotating, and in severe cases may cause safety accidents such as short circuit or leakage.

[0003] As described in domestic patent CN220352439U, a leakage monitoring device and a washing machine are specifically provided, aiming to solve the problem that the leakage point of the existing washing machine is difficult to determine, making the washing machine difficult to repair. To this end, the leakage monitoring device of the utility model includes: at least one sensor, the sensor is arranged at a position set by the washing machine, and is used to collect leakage monitoring data around the sensor; the controller reads the leakage monitoring data, and determines whether a leakage occurs according to the leakage monitoring data. The utility model sets a leakage monitoring device on the washing machine, so that the user can accurately judge whether the washing machine is leaking, and can also accurately judge the location of the leakage, so that the user or non-professional maintenance personnel can take repair measures, thereby improving the user experience.

[0004] Disadvantages of prior art 1:

[0005] 1. Failure to provide effective leakage protection for the piston pump may cause damage to the pump body, especially the motor;

[0006] 2. An external leakage monitoring device is required, which is costly.

[0007] As described in the domestic patent CN216691446U, the utility model relates to a pump, a liquid delivery device and a washing machine. The pump comprises: a pump body extending along a longitudinal axis, having a pump cavity and a first end thereof connected to a driving mechanism; a pump head connected to a second end of the pump body opposite to the first end and provided with a liquid inlet and a liquid outlet connected to the pump cavity; a middle plate arranged between the pump body and the pump head; a first seal arranged between the pump head and the middle plate; a second seal arranged between the pump body and the middle plate; and a compression limiting component arranged on at least one of the second end of the pump body, the first side of the middle plate facing the pump head, the second side of the middle plate facing the pump body, and the side of the pump head facing the middle plate, and used to limit the compression of the corresponding seal of the first seal and the second seal.

[0008] Disadvantages of the second prior art:

[0009] 1. The structure is complex, the seal is radial, the sealing effect is poor, and there are risks;

[0010] 2. There is no effective sealing protection between the motor and the housing, which poses a risk.

[0011] In view of this, a leakage-proof piston pump structure with a one-way valve assembly with a non-uniform bracket is developed. The bracket installation has a fool-proof function, and the motor can be installed in any direction according to the needs. Any installation method has a corresponding leakage protection solution to ensure that no liquid leaks into the motor and causes safety hazards. Utility Model Content

[0012] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0013] A leakage-proof piston pump structure with non-uniform-diameter brackets comprises a housing, and a pump cover assembly is arranged at the end of the housing for mounting a one-way valve assembly;

[0014] A motor assembly is installed at the bottom of the shell to drive the pump body to operate;

[0015] The pump cover assembly comprises a pump cover and a small sealing ring, the pump cover is provided with a water inlet and a water outlet, and two sealing rings are respectively sleeved on the water inlet and the water outlet;

[0016] The one-way valve assembly comprises a large O-ring, a non-uniform bracket, a small O-ring and a fan-shaped valve; wherein the large port of the non-uniform bracket is sleeved with the large O-ring, the small port of the non-uniform bracket is sleeved with the small O-ring, and the fan-shaped valve is installed inside the non-uniform bracket;

[0017] The shell comprises a large hole installation groove and a small hole installation groove which are arranged at the end; two symmetrically distributed water baffles are installed on the top of the shell, and a sealing groove is also opened on the shell.

[0018] As a preferred embodiment of the utility model, the motor assembly is a servo motor, and the drive shaft is inserted into the sealing groove and fixed to the central axis of the cam, and the cam is installed in the inner cavity of the shell, and a piston assembly is movably arranged in the shell, and the cam drives the piston assembly to reciprocate.

[0019] As a preferred embodiment of the utility model, the piston assembly includes a piston rod, which is slidably arranged in the cylinder body of the housing, and the eccentric rod of the cam is movably inserted in the matching groove of the piston rod.

[0020] As a preferred embodiment of the present invention, a protective cover is detachably mounted on the rear portion of the shell.

[0021] As a preferred embodiment of the present utility model, a Y-shaped sealing ring is sleeved on the outside of the piston rod.

[0022] As a preferred embodiment of the utility model, a large sealing ring is sleeved at the joint between the driving shaft of the servo motor and the sealing groove, and the servo motor is detachably connected to the housing by screws.

[0023] As a preferred embodiment of the utility model, the shell as a whole is connected to the screw column integrally arranged on the liquid storage tank through a fixed mounting hole; and the liquid storage tank has two accommodating cavities, and a pump interface groove adapted to the pump cover assembly is opened at the upper end of each accommodating cavity.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] During the upward installation of the motor of the utility model, the studs close to the pump cover will not affect the installation; the installation bracket can prevent mistakes and will not be installed upside down; anti-leakage measures are provided to protect the safety of the motor; the overall structure is simple and does not increase extra costs.

[0026] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the attached picture:

[0028] Figure 1 This is a schematic diagram of the overall structure of the piston pump of the utility model;

[0029] Figure 2 This is a schematic diagram of the explosion structure of the piston pump of the utility model;

[0030] Figure 3This is a schematic diagram of the cross-sectional structure of the piston rod of the utility model from top view;

[0031] Figure 4 This is a schematic diagram of the structure of the one-way valve assembly of the utility model;

[0032] Figure 5 This is a schematic diagram of the distribution position structure of the fan-shaped valve of the utility model;

[0033] Figure 6 This is a schematic diagram of the internal structure of the housing of the utility model;

[0034] Figure 7 This is a schematic diagram of the distribution position structure of the large and small installation holes of the utility model;

[0035] Figure 8 This is a schematic diagram of the distribution position structure of the utility model piston pump installed on the water storage tank;

[0036] Fig. 9 This is a schematic diagram of the screw installation position structure of the utility model;

[0037] Fig.10 This is a schematic diagram of the top view of the structure of the piston pump of the utility model distributed on the water storage tank;

[0038] Fig.11 It is a schematic diagram of the side cross-sectional structure of the piston pump of the utility model.

[0039] In the figure: 1-pump interface slot; 2-screw column; 3-same diameter bracket; 100-pump cover assembly; 101-O-ring; 102-pump cover; 200-housing; 201-water retaining rib; 202-sealing slot; 203-small hole mounting slot; 204-large hole mounting slot; 205-fixed mounting hole; 206-motor mounting hole; 10-liquid storage tank; 300-protective cover; 400-motor assembly; 500-check valve assembly; 501-large O-ring; 502-non-same diameter bracket; 503-small O-ring; 504-fan valve; 600-piston rod assembly; 601-piston rod; 602-Y-type sealing ring; 700-cam; 800-sealing ring; 900-screw. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0041] like Figures 1 to 11 As shown, a leakage-proof piston pump structure with non-uniform brackets includes a housing 200, and a pump cover assembly 100 is provided at the end of the housing 200 for installing a one-way valve assembly 500;

[0042] A motor assembly 400 is installed at the bottom of the housing 200 to drive the pump body to operate;

[0043] The pump cover assembly 100 includes a pump cover 102 and a small sealing ring 101. The pump cover 102 is provided with a water inlet and a water outlet. Two sealing rings 101 are respectively sleeved on the water inlet and the water outlet.

[0044] The one-way valve assembly 500 includes a large O-ring 501, a non-uniform bracket 502, a small O-ring 503 and a fan-shaped valve 504; wherein the large port of the non-uniform bracket 502 is sleeved with the large O-ring 501, the small port of the non-uniform bracket 502 is sleeved with the small O-ring 503, and the fan-shaped valve 504 is installed inside the non-uniform bracket 502;

[0045] The shell 200 includes a large hole installation groove 204 and a small hole installation groove 203 which are arranged at the end. Two symmetrically distributed water baffles 201 are installed on the top of the shell 200, and a sealing groove 202 is also opened on the shell 200.

[0046] like Figures 1 to 11 As shown, in a specific embodiment, the motor assembly 400 is a servo motor, and the driving shaft is inserted into the sealing groove 202 and fixed to the central axis of the cam 700, and the cam 700 is installed in the inner cavity of the shell 200, and a piston assembly 600 is movably arranged in the shell 200, and the cam 700 drives the piston assembly 600 to reciprocate, and the piston assembly 600 includes a piston rod 601, and the piston rod 601 is slidably arranged in the cylinder body of the shell 200, and the eccentric rod of the cam 700 is movably inserted in the matching groove of the piston rod 601, and a protective cover 300 is detachably installed at the rear end of the shell 200, and a Y-shaped sealing ring 602 is sleeved on the outside of the piston rod 601.

[0047] like Figures 1 to 11 As shown, further, a large sealing ring 800 is sleeved at the joint between the driving shaft of the servo motor and the sealing groove 202, and the servo motor is detachably connected to the housing 200 by means of screws 900, and the housing 200 as a whole is connected to the screw column 2 integrally arranged on the liquid storage tank 10 by means of a fixed mounting hole 205; and the liquid storage tank 10 has two accommodating cavities respectively, and a pump interface groove 1 adapted to the pump cover assembly 100 is opened at the upper end of each accommodating cavity.

[0048] The implementation principle of the anti-leakage piston pump structure of a non-uniform bracket of the present embodiment is as follows: Structural description: The one-way valve assembly includes a bracket, an O-ring, and a fan-shaped valve 504. The bracket is divided into two non-uniform sealing grooves, a large sealing groove for installing a large O-ring, and a small sealing groove for installing a small O-ring. A fan-shaped valve is installed in the middle of the bracket. The entire one-way valve assembly is in the shape of a convex letter. When it is installed into the shell, the small diameter end of the bracket matches the small hole mounting groove of the shell, and the large diameter end of the bracket matches the large hole mounting groove of the shell. When the valve cover assembly is closed, the small diameter end of the bracket matches the small hole mounting groove of the valve cover, and the large diameter end of the bracket matches the large hole mounting groove of the valve cover. Any installation error in the shell, bracket, and pump cover will cause the bracket to be unable to be installed normally, so as to achieve the purpose of fool-proofing.

[0049] Installation instructions: The bracket adopts a non-same diameter design, which can make the one-way valve assembly dislocated and compressed, reduce the width of the pump cover position, and offset to one end. Reserve space for the fixed installation hole near the pump cover end. When the piston pump is installed with the motor facing upward, before inserting it into the pump interface groove, the pump cover and the pump interface groove must be pulled apart by a certain distance, and then the pump body is inserted into the pump interface groove. In this process, if the width of the pump cover position is too wide, it will interfere with the studs near the pump cover. If the bracket is of the same diameter, the pump cover position of the piston pump will interfere with the studs and cannot be installed at all. Therefore, the piston pump with the bracket of the same diameter can only be installed with the motor downward, which will cause the liquid to flow to the motor in case of leakage, causing a safety accident.

[0050] Leakage prevention measures: Installing the motor upwards can prevent the pump body from leaking and affecting the motor. However, if the motor is to be installed downwards, leakage prevention measures need to be considered. There are three leakage points for piston pumps: one is the connection between the housing and the pump cover, one is the installation point of the housing and the protective cover, and the other is the position where the shaft of the motor assembly is inserted into the housing. For the first two, water retaining ribs can be added to the housing, set between the leakage point and the outer contour of the motor. For the latter, a Y-shaped sealing ring is added to the sealing groove of the housing to protect the piston cavity of the housing from water leakage, which will not leak to the motor from here, ensuring the safe operation of the motor.

Claims

1. A leak-proof piston pump structure with non-uniform diameter brackets, comprising a housing (200), characterized in that: A pump cover assembly (100) is provided at the end of the housing (200) for mounting a one-way valve assembly (500); A motor assembly (400) is installed at the bottom of the housing (200) for driving the pump body to operate; The pump cover assembly (100) comprises a pump cover (102) and a small sealing ring (101); the pump cover (102) is provided with a water inlet pipe opening and a water outlet pipe opening, and the two sealing rings (101) are respectively sleeved on the water inlet pipe opening and the water outlet pipe opening; The one-way valve assembly (500) comprises a large O-ring (501), a non-uniform bracket (502), a small O-ring (503) and a fan-shaped valve (504); wherein the large port of the non-uniform bracket (502) is sleeved with the large O-ring (501), the small port of the non-uniform bracket (502) is sleeved with the small O-ring (503), and the fan-shaped valve (504) is installed inside the non-uniform bracket (502); The shell (200) comprises a large hole installation groove (204) and a small hole installation groove (203) provided at the end; two symmetrically distributed water baffles (201) are installed on the top of the shell (200), and a sealing groove (202) is also provided on the shell (200).

2. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 1, characterized in that: The motor assembly (400) is a servo motor, and the drive shaft is inserted into the sealing groove (202) and fixed to the central axis of the cam (700), and the cam (700) is installed in the inner cavity of the housing (200), and a piston assembly (600) is movably arranged in the housing (200), and the cam (700) drives the piston assembly (600) to reciprocate.

3. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 2, characterized in that: The piston assembly (600) comprises a piston rod (601), the piston rod (601) being slidably disposed in a cylinder body of the housing (200), and the eccentric rod of the cam (700) being movably inserted into a matching notch of the piston rod (601).

4. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 1, characterized in that: A protective cover (300) is detachably mounted on the rear portion of the housing (200).

5. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 3, characterized in that: The outside of the piston rod (601) is sleeved with a Y-shaped sealing ring (602).

6. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 2, characterized in that: A large sealing ring (800) is sleeved at the insertion point between the driving shaft of the servo motor and the sealing groove (202), and the servo motor is detachably connected to the housing (200) via screws (900).

7. The anti-leakage piston pump structure of non-uniform diameter brackets according to claim 1, characterized in that: The housing (200) is connected as a whole to a screw column (2) integrally provided on the liquid storage tank (10) via a fixing installation hole (205); and the liquid storage tank (10) has two accommodating chambers, and each accommodating chamber has a pump interface groove (1) adapted to the pump cover assembly (100) at its upper end.

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