Portable electric high-pressure plunger pump

Abstract

The utility model discloses a portable electric high-pressure plunger pump which comprises a plunger pump body, a motor is installed on the plunger pump body, a reduction gearbox is fixedly installed at the end of the motor, meanwhile, a cylinder body is installed on the side, away from the motor, of the reduction gearbox in a threaded connection mode, and a water outlet connector is fixedly installed on the upper side of the end of the cylinder body. A water inlet joint is fixedly mounted on the lower side of the end of the cylinder body; an eccentric wheel is movably installed in the cylinder body, a plunger is installed on one side of the eccentric wheel, meanwhile, a water seal is installed on the left side of the plunger, a pressure regulating valve is installed on the lower portion in the cylinder body, and a water inlet valve is installed on the right side of the pressure regulating valve. According to the portable electric high-pressure plunger pump, the pressure regulating valve can be used as a safety valve, and when the working pressure exceeds a set pressure value, high-pressure liquid pushes a sealing bead in the pressure regulating valve, so that part of liquid is released through the pressure release seat, the set working pressure is kept, and the effects of pressure stabilization and safety are achieved.

Description

Technical Field

[0001] The utility model relates to the field of plunger pumps, and particularly to a portable electric high-pressure plunger pump. Background Art

[0002] At present, for motorized sprayers on the market, gasoline engines are used as power to drive plunger pumps or piston pumps to generate high-pressure liquid for spray operations. As a boosting pump, the plunger pump or piston pump is widely accepted and used because it saves time and effort.

[0003] However, through long-term observation, we found that when the plunger pump is actually used, excessive pressure will cause seals such as O-rings and packings to bear excessive stress, accelerating the wear, deformation, and even rupture of the seals, resulting in leakage problems of the pump; under the action of strong pressure, the friction between the plunger and the cylinder block increases, which will shorten the service life of the plunger and the cylinder block, affecting the working efficiency and performance of the pump. Summary of the Invention

[0004] The purpose of the utility model is to provide a portable electric high-pressure plunger pump to solve the defects mentioned in the above background art.

[0005] To achieve the above purpose, a portable electric high-pressure plunger pump is provided, including a plunger pump body. A motor is installed on the plunger pump body, and a reduction gearbox is fixedly installed at the end of the motor. At the same time, a cylinder block is screwed and installed on the side of the reduction gearbox away from the motor. An outlet joint is fixedly installed on the upper side of the end of the cylinder block, and an inlet joint is fixedly installed on the lower side of the end of the cylinder block. An eccentric wheel is movably installed inside the cylinder block, a plunger is installed on one side of the eccentric wheel, and a water seal is installed on the left side of the plunger. A pressure regulating valve is installed below the inside of the cylinder block, an inlet valve is installed on the right side of the pressure regulating valve, and an outlet valve is installed on the upper side of the pressure regulating valve.

[0006] Preferably, the output shaft at the end of the motor drives the eccentric wheel and the plunger inside the cylinder block through the reduction gearbox, and the eccentric wheel, the plunger and the end cover of the cylinder block are sealed through a water seal.

[0007] Preferably, both the outlet joint and the inlet joint are provided in a cylindrical shape, and a threaded structure is provided on the circumferential outer side of the outlet joint and the inlet joint.

[0008] Preferably, the part of the end of the outlet joint located inside the cylinder block is communicated with the outlet valve, and the part of the end of the inlet joint located inside the cylinder block is communicated with the inlet valve.

[0009] Preferably, both the inlet valve and the outlet valve are provided in two groups, and the two groups of inlet valves and outlet valves are respectively installed on both sides of the pressure regulating valve; both the inlet valve and the outlet valve are communicated with the inside of the pressure regulating valve.

[0010] Preferably, the pressure regulating valve includes a pressure relief passage, and a sealing bead is movably installed at the bottom of the pressure relief passage. At the same time, a spring is installed at the bottom of the sealing bead, and the bottom of the spring is inlaid and fixed on the pressure relief seat. The pressure relief seat is screwed and fixed inside the installation groove opened at the bottom of the cylinder block and sealed by a rubber sealing ring. A pressure discharge hole is opened inside the pressure relief seat.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. In the present utility model, a pressure regulating valve for pressure regulation and relief is provided inside the cylinder block. The pressure regulating valve can be used as a safety valve. When the working pressure exceeds the set pressure value, the high-pressure liquid pushes the sealing bead inside the pressure regulating valve, causing part of the liquid to be discharged through the pressure relief seat to maintain the set working pressure, playing a role in voltage stabilization and safety; it can be started in time when the pressure is too high, avoiding key components such as the plunger, cylinder block, and seals from continuously bearing excessive pressure, thereby reducing excessive wear caused by overpressure, extending the service life of components and the equipment, and reducing the maintenance cost and replacement frequency of the equipment; greatly improving the working efficiency and performance of the pump;

[0013] 2. In the present utility model, the excessive pressure impact inside the cylinder block acts on the sealing bead. The surface of the sealing bead is stressed and compresses the spring downward, causing the sealing bead to disengage from the bottom of the pressure relief passage, enabling the pressure relief passage to communicate with the pressure discharge hole and completing the pressure relief work on the cylinder block; when the pressure inside the cylinder block is less than the elastic force of the spring, the spring resets at this time, the sealing bead moves upward, sealing the bottom of the pressure relief passage, and completing a pressure relief cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0015] Figure 2 is Figure 1 a top cross-sectional view of

[0016] Figure 3 is Figure 2 a schematic diagram of the A-A cross-sectional structure in

[0017] Figure 4 is Figure 2 a schematic diagram of the B-B cross-sectional structure in

[0018] Figure 5 is Figure 1 a top view of

[0019] Reference numerals in the figure: 1, electric motor; 2, reduction gearbox; 3, eccentric wheel; 4, plunger; 5, water seal; 6, water inlet joint; 7, water inlet valve; 8, water outlet valve; 9, pressure regulating valve; 91, pressure relief passage; 92, sealing bead; 93, spring; 94, pressure relief seat; 95, pressure discharge hole; 10, water outlet joint; 11, cylinder block; 12, plunger pump body. Detailed implementation manner

[0020] Please refer to Figures 1-5 , the present utility model provides a portable electric high-pressure plunger pump, which includes a plunger pump body 12, a motor 1 is installed on the plunger pump body 12, and a reduction gearbox 2 is fixedly installed at the end of the motor 1. At the same time, a cylinder block 11 is screwed and installed on the side of the reduction gearbox 2 away from the motor 1, and a water outlet joint 10 is fixedly installed on the upper side of the end of the cylinder block 11, and a water inlet joint 6 is fixedly installed on the lower side of the end of the cylinder block 11; an eccentric wheel 3 is movably installed inside the cylinder block 11, and a plunger 4 is installed on one side of the eccentric wheel 3. At the same time, a water seal 5 is installed on the left side of the plunger 4, and a pressure regulating valve 9 is installed below the inside of the cylinder block 11, and a water inlet valve 7 is installed on the right side of the pressure regulating valve 9, and a water outlet valve 8 is installed on the upper side of the pressure regulating valve 9.

[0021] Working principle: When the plunger pump body 12 is working, after the motor 1 is decelerated by the reduction gearbox 2, the eccentric wheel 3 drives the plunger 4 to make a reciprocating motion, and oil-containing bearings are arranged at both ends of the plunger 4 for guiding and positioning, which plays a role in guiding and positioning the plunger 4 to stabilize, so as to improve the overall working stability and service life of the pump. Then, under the action of the water seal 5, a volume difference is generated in the pump body, and the liquid enters the inner cavity of the pump from the water inlet joint 6 through the water inlet valve 7, and then is compressed by the plunger 4 to generate high-pressure liquid. The high-pressure liquid is output from the water outlet valve 8 through the water outlet joint 10; there is a pressure regulating valve 9 for pressure regulation and pressure relief inside the cylinder block 11. The pressure regulating valve 9 can be used as a safety valve. When the working pressure exceeds the set pressure value, the high-pressure liquid pushes the sealing bead 92 inside the pressure regulating valve 9, so that part of the liquid is discharged through the pressure relief seat 94 to maintain the set working pressure, playing a role in voltage stabilization and safety; it can be started in time when the pressure is too high, avoiding the key components such as the plunger 4, the cylinder block 11 and the seal from continuously bearing too high pressure, thereby reducing the excessive wear caused by overpressure, extending the service life of these components, and reducing the maintenance cost and replacement frequency of the equipment; the working mode of the pressure regulating valve 9 is: the excessive pressure impact inside the cylinder block 11 acts on the sealing bead 92, the surface of the sealing bead 92 is stressed and compresses the spring 93 downward, so that the sealing bead 92 is separated from the bottom of the pressure relief passage 91, so that the pressure relief passage 91 is communicated with the pressure discharge hole 95, completing the pressure relief work on the cylinder block 11; when the pressure inside the cylinder block 11 is less than the elastic force of the spring 93, at this time the spring 93 resets, the sealing bead 92 moves upward, sealing the bottom of the pressure relief passage 91, completing a pressure relief cycle.

[0022] The output shaft at the end of the motor 1 drives the eccentric wheel 3 and the plunger 4 inside the cylinder block 11 through the reduction gearbox 2, and the eccentric wheel 3 and the plunger 4 are sealed with the end cover of the cylinder block 11 through the water seal 5.

[0023] As a preferred embodiment, both the water outlet joint 10 and the water inlet joint 6 are arranged in a cylindrical shape, and threaded structures are provided on the outer circumferences of the water outlet joint 10 and the water inlet joint 6.

[0024] The part of the end of the water outlet joint 10 located inside the cylinder block 11 is communicated with the water outlet valve 8, and the part of the end of the water inlet joint 6 located inside the cylinder block 11 is communicated with the water inlet valve 7.

[0025] As a preferred embodiment, both the water inlet valve 7 and the water outlet valve 8 are arranged in two groups, and the two groups of water inlet valves 7 and water outlet valves 8 are respectively installed on both sides of the pressure regulating valve 9; both the water inlet valve 7 and the water outlet valve 8 are communicated with the inside of the pressure regulating valve 9.

[0026] The pressure regulating valve 9 includes a pressure relief channel 91, and a sealing bead 92 is movably installed at the bottom of the pressure relief channel 91. At the same time, a spring 93 is installed at the bottom of the sealing bead 92, and the bottom of the spring 93 is inlaid and fixed on the pressure relief seat 94. The pressure relief seat 94 is screwed and fixed inside the installation groove opened at the bottom of the cylinder block 11 and is sealed through a rubber sealing ring, and a pressure discharge hole 95 is opened inside the pressure relief seat 94.

Claims

1. A portable electric high-pressure plunger pump, comprising a plunger pump body (12), characterized in that: A motor (1) is installed on the plunger pump body (12). A speed reducer (2) is fixedly installed at the end of the motor (1). At the same time, a cylinder block (11) is screwed and installed on the side of the speed reducer (2) away from the motor (1). An outlet joint (10) is fixedly installed on the upper side of the end of the cylinder block (11), and an inlet joint (6) is fixedly installed on the lower side of the end of the cylinder block (11). An eccentric wheel (3) is movably installed inside the cylinder block (11). A plunger (4) is installed on one side of the eccentric wheel (3). At the same time, a water seal (5) is installed on the left side of the plunger (4). A pressure regulating valve (9) is installed below the inside of the cylinder block (11). An inlet valve (7) is installed on the right side of the pressure regulating valve (9). At the same time, an outlet valve (8) is installed on the upper side of the pressure regulating valve (9).

2. The portable electric high-pressure plunger pump according to claim 1, wherein: The output shaft at the end of the motor (1) drives the eccentric wheel (3) and the plunger (4) inside the cylinder block (11) through the speed reducer (2). The eccentric wheel (3) and the plunger (4) are sealed with the end cover of the cylinder block (11) through the water seal (5).

3. A portable electric high-pressure plunger pump according to claim 1, characterized in that: Both the outlet joint (10) and the inlet joint (6) are provided in a cylindrical shape, and a threaded structure is provided on the outer circumference of the outlet joint (10) and the inlet joint (6).

4. The portable electric high-pressure plunger pump according to claim 3, characterized in that: The part of the end of the outlet joint (10) located inside the cylinder block (11) is communicated with the outlet valve (8), and the part of the end of the inlet joint (6) located inside the cylinder block (11) is communicated with the inlet valve (7).

5. The portable electric high-pressure plunger pump according to claim 4, characterized in that: Both the inlet valve (7) and the outlet valve (8) are provided in two groups, and the two groups of inlet valves (7) and outlet valves (8) are respectively installed on both sides of the pressure regulating valve (9). The inlet valve (7) and the outlet valve (8) are both communicated with the inside of the pressure regulating valve (9).

6. A portable electric high-pressure plunger pump according to claim 5, characterized in that: The pressure regulating valve (9) includes a pressure relief channel (91). A sealing bead (92) is movably installed at the bottom of the pressure relief channel (91). At the same time, a spring (93) is installed at the bottom of the sealing bead (92). The spring (93) is inlaid and fixed on the pressure relief seat (94) at the bottom. The pressure relief seat (94) is screwed and fixed inside the installation groove opened at the bottom of the cylinder block (11) and is sealed through a rubber sealing ring. A pressure discharge hole (95) is opened inside the pressure relief seat (94).

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