Pipeline bridge type filtering system

Abstract

The invention relates to a pipeline bridge type filtering system, which is provided with a first oil port and a second oil port, comprises an oil filter and certain number of one-way valves, and is characterized in that the first oil port and the second oil port are connected with a tee pipe respectively, one branch of each tee pipe is connected with an inlet of the oil filter through a positive one-way valve, and the other branch of each tee pipe is connected with an outlet of the oil filter through a reverse one-way valve. The pipeline bridge type filtering system is applied to a closed system, and can ensure the one-way flow of the oil filter when a motor rotates positively and reversely, effectively filter dirt in hydraulic oil so that the filtered dirt cannot return to a pump or the motor when the dirt flows back in a reverse direction, reduce the fault rate, and improve the safety of the whole system.

Description

technical field [0001] The invention relates to a filter device for hydraulic oil in a closed system, in particular to a pipeline bridge filter system. Background technique [0002] Most of the trenchless drilling rigs in the prior art are driven by hydraulic pressure. In a closed system, the A and B ports of the pump output oil and are directly connected to the A and B ports of the motor. Since the hydraulic oil will have dust during the working process If dirt enters, one component in the pump or motor may be blocked or damaged, which may easily cause damage to another component. For this reason, it is necessary to install a high-pressure oil filter in the entire pipeline, but the closed system The direction of oil outlet and oil return from ports A and B of the middle pump is variable, and the dirt filtered by the ordinary oil filter will return to the pump or motor when it flows in the reverse direction, and the filtering effect will not be achieved. Contents of the in...

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Problems solved by technology

[0002] Most of the trenchless drilling rigs in the prior art are driven by hydraulic pressure. In a closed system, the A and B ports of the pump output oil and are directly connected to the A and B ports of the motor. Since the hydraulic oil will have dust during the working process If dirt enters, one component in the pump or motor may be blocked or damaged, which may easily cause damage to another component. For this reason, it is necessary to install a high-pressure oil filter in the entire pipeline, but the closed system The direction of oil outlet and oil return from ports A and B of the middle pump is variable, and the dirt filtered by the ordinary oil filter will return to the pump or motor when it flows in the reverse direction, and the filtering effect will not be achieved.

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