Plunger pump with soft start function for high-pressure cleaning machine

Abstract

The plunger pump comprises a pump body, a high-pressure cavity, a low-pressure cavity and a pressure regulating valve, the high-pressure cavity, the low-pressure cavity and the pressure regulating valve are arranged in the pump body, a mounting part is arranged on one side of the pump body, a mounting groove is formed in the mounting part, a first flow channel and a second flow channel are formed in the side wall of the mounting groove, the first flow channel is communicated with the low-pressure cavity, and the second flow channel is communicated with the low-pressure cavity. The runner II is communicated with the high-pressure cavity; a choke plug is inserted in the mounting groove, and a first circulation groove and a second circulation groove are formed in the choke plug. A steel ball is arranged in the first circulation groove, a supporting ring is arranged in the mounting groove, a placing ring groove is formed in the position, corresponding to an inlet of the first flow channel, of the bottom of the mounting groove, a spring is placed in the placing ring groove, the spring penetrates through an inner hole of the supporting ring and extends into the first circulation groove, and the top end of the spring abuts against the steel ball. The low-load soft start circuit can realize low-load soft start.

Description

Technical Field

[0001] This utility model relates to the field of plunger pumps, and in particular to a plunger pump with soft-start function for use in high-pressure cleaners. Background Technology

[0002] A plunger pump is an important component of a high-pressure washer. It relies on the reciprocating motion of a plunger within a cylinder to change the volume of the sealed working chamber, thus achieving oil suction and pressure. Plunger pumps offer advantages such as high rated pressure, compact structure, high efficiency, and convenient flow rate adjustment.

[0003] A plunger pump needs to overcome a large load during startup. If the pump outputs full pressure directly, the motor may burn out due to excessive starting torque, or mechanical shock may damage the equipment. Therefore, a soft-start structure needs to be installed on the plunger pump to reduce the starting load on the pump body and decrease the probability of motor burnout. Utility Model Content

[0004] This application provides a plunger pump with soft-start function for use in high-pressure cleaners, which can be soft-started under low load.

[0005] The plunger pump with soft-start function for high-pressure cleaners provided in this application adopts the following technical solution:

[0006] A plunger pump with soft-start function for a high-pressure washer includes a pump body, a high-pressure chamber, a low-pressure chamber, and a pressure regulating valve disposed within the pump body. A mounting portion is provided on one side of the pump body, and a mounting groove is formed on the mounting portion. A flow channel one and a flow channel two are formed on the side wall of the mounting groove. Flow channel one connects to the low-pressure chamber, and flow channel two connects to the high-pressure chamber. A plug is inserted into the mounting groove. A flow channel one with an opening facing downwards and a flow channel two located above the flow channel one are formed within the plug. Flow channel one and flow channel two are connected. A steel ball is placed in flow channel one, and a support ring is placed in the mounting groove. The support ring is located below the steel ball and between the plug and flow channel one, and the inner diameter of the support ring is smaller than the diameter of the steel ball. A placement ring groove is formed at the bottom of the mounting groove corresponding to the inlet of flow channel one. A spring is placed in the placement ring groove, and the spring passes through the inner hole of the support ring and extends into flow channel one, with its top end abutting against the steel ball.

[0007] By adopting the above technical solution, when the plunger pump is not started, the spring will press the steel ball against the lower opening of the flow channel two, thus blocking the flow channel two. When the plunger pump is first started, with the high-pressure chamber closed and the pressure regulating valve reset closed, air and a small amount of water in the high-pressure chamber flow into the flow channel through the flow channel two. Then, the air and water will push the steel ball, causing the steel ball to move away from the flow channel two, and the spring will be compressed. At this time, air and water can enter the flow channel one and the low-pressure chamber through the gap between the steel ball and the flow channel one. As the air inside the plunger pump is discharged and a large amount of water is drawn in, the pressure in the high-pressure chamber will gradually increase. Then, the pressure of the air and water pushing the steel ball on the steel ball will also gradually increase. Finally, the steel ball will be pressed against the support ring, the passage between the high-pressure chamber and the low-pressure chamber will be cut off, the soft start of the pump body will be completed, and the pump body will enter the normal working state after that.

[0008] Preferably, the support ring includes a rubber ring and a connecting seat sleeved on the outside of the rubber ring, the connecting seat being slidably placed into the mounting groove; the inner diameter of the rubber ring is smaller than the diameter of the steel ball, and the spring passes through the inner hole of the rubber ring and extends into the flow groove.

[0009] By adopting the above technical solution, it is convenient to place the rubber ring into the installation groove, and deformation and displacement of the rubber ring can be prevented during placement.

[0010] Preferably, the top of the connector has a threaded hole, and the bottom of the plug is threaded into the threaded hole.

[0011] By adopting the above technical solution, the connector and the end cap are connected, allowing the installation of both components to be completed in one go.

[0012] Preferably, a receiving groove is provided on the bottom wall of the threaded hole, the rubber ring is placed in the receiving groove, and the connecting seat presses the rubber ring against the end cap.

[0013] By adopting the above technical solution, when installing the connector, the rubber ring is placed in the receiving groove, and then the connector is screwed onto the end cap, so that the connector and the end cap exert pressure on the rubber ring, preventing the rubber ring from coming off between them.

[0014] Preferably, the rubber ring has a positioning groove, and the bottom of the end cap has a positioning block. The positioning block is inserted into the positioning groove to position the rubber ring relative to the end cap during assembly.

[0015] By adopting the above technical solution, the probability of the rubber ring shifting and falling off when the pump body is turned on in the later stage can be further reduced.

[0016] Preferably, the end cap is provided with an inlet ring groove, which is directly opposite to the flow channel two, and the opening of the flow channel two away from the flow channel one is connected to the inlet ring groove.

[0017] By adopting the above technical solution, air and water entering the flow channel can enter the circulation channel two regardless of the angle at which the plug is inserted into the installation slot.

[0018] Preferably, the top of the plug extends out of the mounting groove, and an insertion hole is provided on the top of the plug. The insertion hole penetrates the plug, and a rod can be inserted into the insertion hole. Pulling the rod can remove the plug from the mounting groove.

[0019] By adopting the above technical solution, it is convenient to disassemble and repair the device later.

[0020] The main technical effects of this utility model are reflected in the following aspects:

[0021] 1. This utility model sets a soft-start structure on the plunger pump to reduce the starting load of the plunger pump, so as to enable the plunger pump to start softly and thus protect the motor.

[0022] 2. This utility model features a threaded connection structure between the plug and the connecting seat, facilitating the installation of components such as rubber rings.

[0023] 3. The socket provided in this utility model facilitates the disassembly and maintenance of the end cap, as well as the replacement of components such as rubber rings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the plunger pump in this application.

[0025] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0026] Figure 3 yes Figure 2 A schematic diagram of the mechanism when the steel ball is pressed onto the rubber ring.

[0027] Reference numerals: 1. Pump body; 11. High-pressure chamber; 12. Low-pressure chamber; 13. Pressure regulating valve; 14. Mounting part; 15. Mounting groove; 16. Flow channel one; 17. Flow channel two; 18. Placement ring groove; 19. Spring; 2. End cap; 21. Flow channel one; 22. Flow channel two; 23. Steel ball; 24. Positioning block; 25. Inlet ring groove; 26. Insertion hole; 3. Support ring; 31. Rubber ring; 311. Positioning ring groove; 32. Connecting seat; 321. Threaded hole; 322. Receiving groove. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present application can be more easily understood and mastered.

[0029] Reference Figure 1 and Figure 2This embodiment discloses a plunger pump with soft-start function for a high-pressure washer, comprising a pump body 1, a high-pressure chamber 11, a low-pressure chamber 12, and a pressure regulating valve 13 disposed within the pump body 1. A mounting portion 14 is integrally formed on one side of the pump body 1. A mounting groove 15 is provided on the mounting portion 14. A first flow channel 16 and a second flow channel 17 are provided on the side wall of the mounting groove 15. The first flow channel 16 connects to the low-pressure chamber 12, and the second flow channel 17 connects to the high-pressure chamber 11.

[0030] Reference Figure 1 and Figure 2 A plug 2 is inserted into the mounting groove 15, with its top end extending out of the mounting groove 15. A insertion hole 26 is formed on the top end of the plug 2, penetrating through it. A rod can be inserted into the insertion hole 26, and pulling the rod can remove the plug 2 from the mounting groove 15. The plug 2 has a downward-opening flow channel 1 21 and a flow channel 22 located above it. Flow channel 1 21 is connected to flow channel 16, and flow channel 22 is connected to flow channel 2 17. A liquid inlet ring groove 25 is formed on the plug 2, directly opposite flow channel 2 17. The opening of flow channel 22, away from flow channel 11, is connected to the liquid inlet ring groove 25.

[0031] Reference Figure 1 and Figure 2 A steel ball 23 is provided in the flow channel 21, and a support ring is provided in the mounting groove 15. The support ring is located below the steel ball 23 and between the end cap 2 and the inlet of the flow channel 16. The support ring includes a rubber ring 31 and a connecting seat 32 sleeved on the outside of the rubber ring 31. The connecting seat 32 is slidably inserted into the mounting groove 15. A threaded hole 321 is provided on the top of the connecting seat 32, and the bottom of the end cap 2 is threadedly connected to the threaded hole 321. A receiving groove 322 is provided on the bottom wall of the threaded hole 321, and the rubber ring 31 is placed in the receiving groove 322. The connecting seat 32 presses the rubber ring 31 against the end cap 2.

[0032] Reference Figure 1 and Figure 2 Meanwhile, a positioning ring groove 311 is provided on the rubber ring 31, and a positioning block 24 is provided at the bottom of the end cap 2. The positioning block 24 is inserted into the positioning ring groove 311 to position the rubber ring 31 relative to the end cap 2 during assembly, so that the rubber ring 31 is not easily dislodged from the receiving groove 322 when the connecting seat 32 is screwed onto the end cap 2.

[0033] Reference Figure 1 and Figure 2 The inner diameter of the rubber ring 31 is smaller than the diameter of the steel ball 23. The spring 19 passes through the inner hole of the rubber ring 31 and extends into the first flow groove 21. Its top end abuts against the steel ball 23 and presses the steel ball 23 against the bottom opening of the second flow groove 22, so that the steel ball 23 blocks the connection between the second flow groove 22 and the first flow groove 21.

[0034] Reference Figures 1-3 When the plunger pump is first started, with the high-pressure chamber 11 closed and the pressure regulating valve 13 reset closed, air and a small amount of water in the high-pressure chamber 11 flow into the flow channel 17. The air and water then push against the steel ball 23, causing it to move away from the flow channel 22 and compressing the spring 19. At this point, the air and water can pass through the gap between the steel ball 23 and the flow channel 21 into the flow channel 16 and the low-pressure chamber 12. As the air inside the plunger pump is expelled and a large amount of water is drawn in, the pressure inside the high-pressure chamber 11 gradually increases. Consequently, the pressure of the air and water pushing against the steel ball 23 also gradually increases, eventually pressing the steel ball 23 against the support ring. The passage between the high-pressure chamber 11 and the low-pressure chamber 12 is cut off, and the soft start of the pump body 1 is completed. Afterward, the internal pressure of the pump body 1 is established, and it enters normal operating condition.

[0035] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A plunger pump with soft-start function for a high-pressure washer, comprising a pump body (1), a high-pressure chamber (11), a low-pressure chamber (12), and a pressure regulating valve (13) disposed within the pump body (1), characterized in that: The pump body (1) has a mounting part (14) on one side, and a mounting groove (15) is provided on the mounting part (14). A flow channel one (16) and a flow channel two (17) are provided on the side wall of the mounting groove (15). The flow channel one (16) is connected to the low-pressure chamber (12), and the flow channel two (17) is connected to the high-pressure chamber (11). A plug (2) is inserted into the mounting groove (15). A flow channel one (21) with an opening facing downward and a flow channel two (22) located above the flow channel one (21) are provided in the plug (2). The flow channel one (21) is connected to the flow channel one (16). The second (22) is connected to the second flow channel (17); a steel ball (23) is provided in the first flow channel (21), and a support ring is provided in the mounting groove (15). The support ring is located below the steel ball (23) and between the end cap (2) and the first flow channel (16). The inner diameter of the support ring is smaller than the diameter of the steel ball (23). A placement ring groove (18) is opened at the bottom of the mounting groove (15) corresponding to the inlet of the first flow channel (16). A spring (19) is placed in the placement ring groove (18). The spring (19) passes through the inner hole of the support ring and extends into the first flow channel (21), and its top end abuts against the steel ball (23).

2. A plunger pump with soft-start function for a high-pressure washer according to claim 1, characterized in that: The support ring includes a rubber ring (31) and a connecting seat (32) sleeved on the outside of the rubber ring (31). The connecting seat (32) can be slidably placed into the mounting groove (15). The inner diameter of the rubber ring (31) is smaller than the diameter of the steel ball (23). The spring (19) passes through the inner hole of the rubber ring (31) and extends into the flow groove (21).

3. A plunger pump with soft-start function for a high-pressure washer according to claim 2, characterized in that: The top of the connector (32) is provided with a threaded hole (321), and the bottom of the plug (2) is threadedly connected to the threaded hole (321).

4. A plunger pump with soft-start function for a high-pressure washer according to claim 3, characterized in that: The bottom wall of the threaded hole (321) is provided with a receiving groove (322), the rubber ring (31) is placed in the receiving groove (322), and the connecting seat (32) presses the rubber ring (31) against the end cap (2).

5. A plunger pump with soft-start function for a high-pressure washer according to claim 4, characterized in that: The rubber ring (31) has a positioning ring groove (311), and the bottom of the end cap (2) has a positioning block (24). The positioning block (24) is inserted into the positioning ring groove (311) to position the rubber ring (31) relative to the end cap (2) during assembly.

6. A plunger pump with soft-start function for a high-pressure washer according to claim 1, characterized in that: The plug (2) is provided with an inlet ring groove (25), which is directly opposite to the flow channel two (17). The opening of the flow channel two (22) away from the flow channel one (21) is connected to the inlet ring groove (25).

7. A plunger pump with soft-start function for a high-pressure washer according to claim 1, characterized in that: The top of the plug (2) extends out of the mounting groove (15), and the top of the plug (2) is provided with a socket (26). The socket (26) penetrates the plug (2), and a rod can be inserted into the socket (26). Pulling the rod can pull the plug (2) out of the mounting groove (15).

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