Oil pump device of pipe cutter

Abstract

The invention relates to an oil pump device of a pipe cutter, which comprises a hydraulic top head, a piston, an air vent screw, a top cover, a cylinder body, a compression spring, a barrel body, a seal ring, a base, a pressure plate, a support rod, a pin, a handle, a small piston and a pump body, wherein the cylinder body is installed on the base by threaded connection, the barrel body is sheathed at the outer ring of the cylinder body, the top cover is tightly screwed on the cylinder body by a thread, and simultaneously the barrel is compressed; the piston and the seal ring form a piston rod assembly, the compression spring is sheathed on the piston rod, the hydraulic top head is installed on the piston, the piston rod assembly is installed in the cylinder body, the lateral side of the barrel body on the base is provided a small manual pump comprising the support rod, the pin, the handle, the small piston and the pump body, the support rod is connected with the handle by the pin, the small piston in the pump body is connected with the handle, a pressure-regulating oil way is added on the pump body, and a return pipeline of the pump is provided with a return oil way; and the air vent screw is fixed in an air vent at one side of the top cover, and the pressure plate at the bottom of the piston is fixed on the based by screws. The oil pump device has the advantages of compact structure, stable quality, low failure rate and convenient maintenance and repair.

Description

technical field [0001] The invention belongs to the oil pump on the pipe cutting machine, which replaces the oil pump and the oil cylinder assembly on the similar foreign pipe cutting machines, and realizes the upward and downward movement of the cutter arm to achieve the purpose of pipe cutting. The oil pump of the present invention adopts a built-in oil circuit, which reduces problems such as loss of pressure caused by loose connection of the pipeline, failure to work normally, and the like. Background technique [0002] The pipe cutting machine is used to cut the pipe fittings. In the past, the pipe fittings were mainly cut by the cutting machine. Due to the limitation of the diameter of the grinding wheel, the pipes above 8″ cannot be cut. Large-scale pipe fittings need to be completed with the help of large-scale special equipment. Foreign 258 electric The pipe cutting machine performs ring cutting by rotating the pipe fittings, which greatly reduces the downward moveme...

AI Technical Summary

Problems solved by technology

The oil pump and cylinder of the 258 electric pipe cutting machine are connected by high-pressure oil pipes, and the pressure required for work is relatively high, which has high requirements for pipes and seals. This model is a movable electric tool. It is very easy to cause oil leakage due to twisting of the hose, resulting in pressure loss and the machine cannot work normally

Because domestic manufacturers cannot meet the technical requirements, they have to use mature jacks to replace this set of oil pumps and oil cylinders, but the jacks cannot achieve fast feed, and the force direction is not perpendicular to the knife arm. Caused by power loss, pressure can not be adjusted and other defects , the structure is not compact, and the appearance is rough, which makes customers complain

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