Manual single plunger pump with unloading function

Abstract

The invention discloses a manual single plunger pump with an unloading function. The manual single plunger pump comprises a cuboid pump body and a manual rocker, wherein a support bar is arranged on the pump body, the upper end of the support bar is hinged to the middle of the manual rocker, the pump body is provided with a vertical plunger hole in which a plunger rod is arranged, the upper end of the plunger rod extends out of the plunger hole and is hinged to one end of the manual rocker, an oil absorption channel and an oil return channel are arranged in the pump body and are connected to a fuel tank, an oil transfer channel is arranged below the plunger hole and is connected with a plunger cylinder through a pipeline I, the oil return channel is connected to the fuel tank through a pipeline II which is provided with a cut-off valve, the oil transfer channel is communicated with the plunger hole, a one-way valve I is arranged in the oil absorption channel, a one-way valve II is arranged in the oil transfer channel and is provided with a mandril which is contacted with the plunger rod in a matching way, and the hole wall at the upper part of the plunger hole is provided with a sealing ring. By adopting the manual single plunger pump, the pipelines are effectively simplified, the space is saved, and the cost is reduced.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a manual single plunger pump with an unloading function. Background technique [0002] At present, the hydraulic circuit for lifting the hood of the road roller mostly uses a circuit composed of a manual pump, a solenoid valve, and a hydraulic lock. During the use of the hydraulic circuit for lifting the hood of the road roller, the reliability of the system is often reduced and the failure rate is increased. Moreover, due to its high price, the cost of repairing or replacing parts is relatively large. In actual use, it brings great inconvenience. Especially the manual pump is an important part in the hydraulic circuit for lifting the hood of the road roller. How to improve the performance of the manual pump and then improve the hydraulic circuit for lifting the hood of the road roller is an urgent problem to be solved by those skilled in the art. Contents of the invention [0003] The objec...

AI Technical Summary

Problems solved by technology

[0002] At present, the hydraulic circuit for lifting the hood of the road roller mostly uses a circuit composed of a manual pump, a solenoid valve, and a hydraulic lock. During the use of the hydraulic circuit for lifting the hood of the road roller, the reliability of the system is often reduced and the failure rate is increased. Moreover, due to its high price, the cost of repair or replacement parts is relatively large

In the actual use process, it brings a lot of inconvenience

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