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CN-121993392-A - Plunger pump for high-pressure cleaning machine

CN121993392ACN 121993392 ACN121993392 ACN 121993392ACN-121993392-A

Abstract

The invention relates to the technical field of high-pressure cleaning machines, in particular to a plunger pump for a high-pressure cleaning machine, which comprises a pump cover and a pump shell, wherein the pump cover and the pump shell form a pump body, a water inlet channel, a low-pressure one-way valve, a plunger cavity, a water outlet channel and an overflow channel are arranged in the pump body, the low-pressure one-way valve is arranged between the water inlet channel and the plunger cavity, the overflow channel is further provided with the overflow valve, the overflow channel is communicated with the water outlet channel through a pressure relief hole, the plunger pump further comprises a transition channel, the transition channel is respectively communicated with the overflow channel, the water outlet channel and the plunger cavity, a high-pressure one-way valve is arranged between the transition channel and the plunger cavity, and a control valve for controlling the on-off of the transition channel and the water outlet channel is arranged in the transition channel.

Inventors

  • TAN DONGYUN
  • CHEN XUAN
  • YI SHANJIN
  • ZHU WEI

Assignees

  • 宁波华勋清洁机械有限公司

Dates

Publication Date
20260508
Application Date
20260126

Claims (8)

  1. 1. A plunger pump for a high-pressure cleaning machine comprises a pump cover (1) and a pump shell (2), wherein the pump cover (1) and the pump shell (2) form a pump body, a water inlet channel (3), a low-pressure one-way valve (4), a plunger cavity (5), a water outlet channel (7) and an overflow channel (8) are arranged in the pump body, the low-pressure one-way valve (4) is arranged between the water inlet channel (3) and the plunger cavity (5), the overflow channel (8) is also internally provided with an overflow valve, the overflow channel (8) is communicated with the water outlet channel (7) through a pressure relief hole (9), the plunger pump is characterized by further comprising a transition channel (10), the transition channel (10) is respectively communicated with the overflow channel (8), the water outlet channel (7) and the plunger cavity (5), a high-pressure one-way valve (6) is arranged between the transition channel (10) and the plunger cavity (5), a control valve for controlling the on-off between the transition channel (10) and the water outlet channel (7) is arranged in the transition channel (10), When the water outlet channel (7) is in a normal working state, the outlet of the water outlet channel (7) is opened, the control valve is opened, the overflow valve is closed, and at the moment, water flows out along the water inlet channel (3), the low-pressure one-way valve (4), the plunger cavity (5), the high-pressure one-way valve (6), the transition channel (10) and the water outlet channel (7); When the gun is in a gun closing recoil state, the outlet of the water outlet channel (7) is closed, the control valve is opened, the overflow valve is completely opened, and water flows in the water outlet channel (7) and the transition channel (10) are led to the water inlet channel (3) through the overflow channel (8) and the pressure relief hole (9); When the gun is in a gun closing and stopping state, the outlet of the water outlet channel (7) is closed, the control valve is closed, the overflow valve is partially opened, at the moment, the water outlet channel (7) is separated from the transition channel (10), and the transition channel (10) is communicated with the overflow channel (8).
  2. 2. A plunger pump for a high-pressure cleaning machine according to claim 1, characterized in that the overflow valve comprises an overflow valve cover (11), an overflow valve core (12), an overflow valve seat (13) and an overflow spring (14), wherein a first communication hole (15) is arranged on the overflow valve cover (11), the transition channel (10) is communicated with the overflow channel (8) through the first communication hole (15), the overflow valve seat (13) is arranged in the overflow channel (8), an overflow cavity is arranged in the overflow valve seat (13), the overflow valve core (12) is arranged in the overflow cavity, a sealing head (16) for sealing the first communication hole (15) is arranged at one end of the overflow valve core (12), the overflow spring (14) is sleeved on the overflow valve core (12) and applies thrust to the overflow valve core (12), the control valve comprises a control valve head (17), a control valve core (18), a control valve seat (19) and a control spring (20), the control valve seat (19) is arranged in the transition channel (10), the control valve seat (19) is provided with a water outlet valve seat (7) which is in the transition valve seat (19) and the control valve seat (19) is arranged in the transition cavity (19), the other end of the control spring (20) is propped against one end of the control valve core (18), the other end of the control valve core (18) is provided with a first sealing surface (22), one end of the control valve head (17) is provided with a second sealing surface (23), when the control valve core (18) is propped against the control valve head (17), the first sealing surface (22) is matched with the second sealing surface (23) for sealing, the other end of the control valve head (17) is provided with a plug (24) for propping against the sealing head (16) to push up the overflow valve core (12), the outer side of the control valve head (17) is provided with a second communication hole (25), the second communication hole (25) is communicated with one end of the control valve head (17), the control valve core (18) is also provided with a pressure maintaining valve for communicating the water outlet channel (7) with the transition channel (10), When the overflow valve is in a normal working state, an outlet of the water outlet channel (7) is opened, the water flow pressure in the control valve core (18) is greater than the elasticity of the control spring (20) under the action of the transition channel (10), at the moment, the control valve core (18) is separated from the control valve head (17), the control valve is opened, and meanwhile, the overflow valve core (12) props against the first communication hole (15) under the action of the overflow spring (14), and the overflow valve is closed; When the gun is in a gun closing recoil state, the outlet of the water outlet channel (7) is closed, the control valve core (18) receives the water flow pressure of the water outlet channel (7) to be larger than the elasticity of the overflow spring (14), so that the control valve core (18) pushes the control valve head (17) to fully jack the overflow valve core (12), at the moment, the overflow valve is fully opened for the transition channel (10) to release pressure, and meanwhile, the pressure maintaining valve is opened for the water outlet channel (7) to release pressure; When the gun is in a gun closing and stopping state, the outlet of the water outlet channel (7) is closed, the water pressure of the water outlet channel (7) is reduced by the control valve core (18), the overflow valve core (12) returns to the action part of the overflow spring (14), at the moment, the overflow valve part is opened, the transition channel (10) is communicated with the overflow channel (8), the pressure maintaining valve is closed, and the water outlet channel (7) is separated from the transition channel (10).
  3. 3. The plunger pump for the high-pressure cleaning machine according to claim 2, wherein the pressure maintaining valve comprises a pressure maintaining valve cover (26), a pressure maintaining valve seat (27), a pressure maintaining valve core (28), a pressure maintaining spring (29) and a pressure maintaining sealing ring (30), the pressure maintaining valve seat (27) is arranged in the transition cavity, the pressure maintaining valve cover (26) is arranged at one end of the pressure maintaining valve seat (27), a pressure maintaining cavity is formed between the pressure maintaining valve seat (27) and the pressure maintaining valve cover (26), a third communication hole (31) used for communicating the pressure maintaining cavity with the water outlet channel (7) is formed in the pressure maintaining valve seat (27), the pressure maintaining valve core (28) is arranged in the pressure maintaining cavity, a groove (32) is formed in the front end of the pressure maintaining valve core (28), the pressure maintaining valve core (28) is matched with the pressure maintaining sealing ring (30), and the pressure maintaining spring (29) is sleeved on the pressure maintaining valve core (28) and applies thrust to the pressure maintaining valve core (28).
  4. 4. A plunger pump for a high-pressure cleaning machine according to claim 2, wherein the matching sealing of the first sealing surface (22) and the second sealing surface (23) means that a sealing groove (33) is arranged on the first sealing surface (22), and a control sealing ring (34) is embedded in the sealing groove (33), and when the control valve core (18) is propped against the control valve head (17), the control sealing ring (34) on the first sealing surface (22) is propped against the second sealing surface (23) to seal.
  5. 5. A plunger pump for a high pressure washer as set forth in claim 2 wherein said plug (24) is adapted to compress one end of the sealing head (16) and the sealing head (16) is adapted to provide a flat surface at the compressed end of the plug (24).
  6. 6. A plunger pump for a high-pressure washer according to claim 2, characterized in that the other end of the control valve head (17) is provided with a diversion trench (35).
  7. 7. A plunger pump for a high-pressure cleaning machine according to claim 2, wherein the pump housing (2) comprises a housing (36), a side pipe (37) and a water inlet pipe (38), the water inlet channel (3) is arranged in the water inlet pipe (38), a plunger port (39) and a water outlet (40) are arranged on the housing (36), the water inlet pipe (38) is communicated with the water outlet (40), a water inlet (41) is arranged on the side pipe (37), the side pipe (37) is communicated with the water inlet pipe (38) through a pressure relief hole (9), the water inlet (41) is communicated with the transition channel (10), the water outlet channel (7) and the overflow channel (8) are respectively arranged on two sides of the transition channel (10), the control valve is arranged in the transition channel (10), and the overflow valve is arranged in the overflow channel (8).
  8. 8. A plunger pump for a high-pressure washer according to claim 7, wherein the pump cover (1) is provided with a first cavity (42) communicated with the water outlet (40), a second cavity (43) communicated with the plunger port (39) and a third cavity (44) communicated with the water inlet (41), the second cavity (43) is a plunger cavity (5), the first cavity (42) is communicated with the second cavity (43), the second cavity (43) is communicated with the third cavity (44), a low-pressure one-way valve (4) is arranged in the first cavity (42), a plunger is arranged in the second cavity (43), and a high-pressure one-way valve (6) is arranged in the third cavity (44).

Description

Plunger pump for high-pressure cleaning machine Technical Field The invention relates to the technical field of high-pressure cleaning machines, in particular to a plunger pump for a high-pressure cleaning machine. Background The high-pressure cleaning machine is a cleaning device which is characterized in that water is pressurized in a plurality of stages through a high-pressure water conversion device (generally referred to as a high-pressure plunger pump) to reach a pressure of more than hundreds of atmospheres, and then is ejected through a high-pressure water gun. The plunger pump is an important component part in the high-pressure cleaning machine, the prior art, such as the Chinese patent application with the name of 'a plunger pump with a high pressure maintaining overflow valve' applied by the inventor 2024, 8 and 30 days, is 202411205915.6, which discloses that the plunger pump is provided with a water inlet channel, a low-pressure one-way valve, a plunger cavity, a high-pressure one-way valve, a main valve, a water outlet channel and an overflow channel, the water outlet channel is communicated with the overflow channel, the overflow channel is internally provided with an overflow valve, a plunger is arranged in the plunger cavity, a first communication cavity is arranged between the low-pressure one-way valve and the water inlet channel, a second communication cavity is arranged between the high-pressure one-way valve and the main valve, and overflow channel passes through first pressure release hole and first communication chamber intercommunication, overflow channel passes through second pressure release hole and second communication chamber intercommunication, like this when closing the rifle, the rivers in the second communication chamber can follow the second pressure release hole and carry out the pressure release, pressure in the second communication chamber can greatly reduced like this, plunger pump wholeness can be promoted and life-span, moreover because set up the second pressure release hole, so when closing the rifle and protect the shut down state, the water pressure in the second communication chamber can keep balanced with the water pressure in the water outlet channel together with the thrust of spring, the thrust just so that just the spring itself need not do very big, whole also can save a part cost like this. However, this structure needs to set up the second pressure relief hole between overflow channel and second intercommunication chamber, and this second pressure relief hole processing is inconvenient, and then probably has led to whole product uniformity relatively poor. Disclosure of Invention The technical scheme to be solved by the invention is to provide the plunger pump for the high-pressure cleaning machine, which can well release pressure when the water gun is closed, and is convenient for integral processing. The invention adopts the technical scheme that the plunger pump for the high-pressure cleaning machine comprises a pump cover and a pump shell, wherein the pump cover and the pump shell form a pump body, a water inlet channel, a low-pressure one-way valve, a plunger cavity, a water outlet channel and an overflow channel are arranged in the pump body, the low-pressure one-way valve is arranged between the water inlet channel and the plunger cavity, the overflow channel is also provided with the overflow valve, the overflow channel is communicated with the water outlet channel through a pressure relief hole, the plunger pump further comprises a transition channel which is respectively communicated with the overflow channel, the water outlet channel and the plunger cavity, a high-pressure one-way valve is arranged between the transition channel and the plunger cavity, a control valve for controlling the on-off between the transition channel and the water outlet channel is arranged in the transition channel, When the water outlet channel is in a normal working state, the outlet of the water outlet channel is opened, the control valve is opened, the overflow valve is closed, and at the moment, water flows out along the water inlet channel, the low-pressure one-way valve, the plunger cavity, the high-pressure one-way valve, the transition channel and the water outlet channel; When the gun is in a gun closing recoil state, the outlet of the water outlet channel is closed, the control valve is opened, the overflow valve is completely opened, and at the moment, water flows in the water outlet channel and the transition channel can be guided to the water inlet channel through the overflow channel and the pressure relief hole; When the gun is in a gun closing and stopping state, the outlet of the water outlet channel is closed, the control valve is closed, the overflow valve is partially opened, at the moment, the water outlet channel is separated from the transition channel, and the transition channel is communicated with the overflow channel. Preferably, the overfl