A high pressure washer

Abstract

The invention discloses a high-pressure washer which has the advantage of avoiding too high instantaneous water pressure so as not cause damage when a spray pipe is closed. According to the technicalscheme, a water inlet and a water outlet are formed in a high-pressure plunger pump, and a valve device is arranged on the high-pressure plunger pump. The valve device comprises a valve body and a flow limiting valve plate, and the valve body is fixedly connected with one end, close to the water outlet, of the high-pressure plunger pump. A valve chamber is formed in the valve body, and the two ends of the valve chamber are respectively connected with a connecting pipe and the water outlet. The flow limiting valve plate is arranged in the valve chamber. A cushioning cylinder body is arranged onthe valve body, and a sealed piston is arranged in the cushioning cylinder body. A connecting rod connected with the flow limiting valve plate is arranged at one end, close to the valve chamber, of the sealed piston, and the other end of the cushioning cylinder body communicates with the connecting pipe. An elastic reset piece for enabling the sealed piston to move to one end far away from the valve body is arranged on the cushioning cylinder body. A flow limiting hole is formed in the flow limiting valve plate, and the section of the flow limiting hole is trapezoidal. The two ends of the trapezoidal flow limiting hole are respectively a large bottom surface and a small bottom surface, and the small bottom surface end of the flow limiting hole is close to the cushioning cylinder body.

Description

Technical field [0001] The invention relates to the field of cleaning machinery, in particular to a high-pressure cleaning machine. Background technique [0002] The high-pressure cleaner uses a motor to drive a high-pressure plunger pump to pump water, and then through the high-pressure plunger pump to deliver the water to the nozzle for high-pressure and high-velocity spraying, so that the sprayed water can be used to flush other equipment. The cleaning principle is: the impact of water is greater than the adhesion of dirt to the surface of the object, and the high-pressure water will peel off the dirt and wash it away to reach a cleaning device that cleans the surface of the object, because it uses high-pressure water to clean the dirt, unless it is very stubborn It is necessary to add a little detergent to the oil stains, otherwise the foam produced by the strong water pressure is enough to take away the general dirt. Because the high pressure water column is used to clean th...

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent application number 201520638978.0 discloses a high-pressure cleaning machine, which is provided with a bracket, a motor, a high-pressure pump, and a spray gun. The motor drives the high-pressure pump to supply water to the spray gun, so that high-pressure water can be sprayed at high pressure and high flow rate from the spray gun, thereby achieving Cleaning effect; but when people need to close the valve for a short time during the spraying process, the valve on the spray gun will be closed, but when the valve is directly closed, the high-pressure, high-flow rate water generated by the high-pressure pump will directly act on the spray gun instantly, so that the spray gun and the connection The water pressure in the pipe rises instantly, and the high-pressure pump stops after detecting that the internal pressure is too high, which affects the life of the spray gun and the connecting pipe. When the instantaneous impact pressure is too large, the connecting pipe and the spray gun are prone to burst, resulting in harm to the operator

Images