Hydraulic filter with filter elements capable of being replaced online and replacement method of hydraulic filter

Abstract

The invention provides a hydraulic filter with filter elements capable of being replaced online. The hydraulic filter comprises two single-barrel filters connected in parallel. Each of the joint of oil inlets of the two single-barrel filters and the joint of oil outlets of the two single-barrel filters is provided with a two-position three-way electromagnet. A pressure switch is arranged in frontof an inlet of one two-position three-way electromagnet. A pressure switch is arranged on an outlet of the other two-position three-way electromagnet. One two-position three-way electromagnet is provided with an inlet valve port and two outlet valve ports, and the two outlet valve ports of the two-position three-way electromagnet are connected with inlets of the single-barrel filters. The other two-position three-way electromagnets is provided with two inlet valve ports and an outlet valve port, and the two inlet valve ports of the two-position three-way electromagnet are connected with outlets of the single-barrel filters. Each two-position three-way electromagnet is provided with one valve element, a valve body and an electromagnetic coil. It is achieved that the blocked filter elementsare replaced and the whole filter is dismounted, mounted and maintained in the normal operation process of a hydraulic system, the delay of manual operation is avoided, the automation degree is increased, and a strong supporter is provided for normal work of the hydraulic system.

Description

technical field [0001] The invention provides a hydraulic filter capable of replacing filter elements on-line and a replacement method thereof, belonging to the field of shield tunneling construction. Background technique [0002] At present, one of the hydraulic system designs is to use two single-cylinder filters, and install a manual valve at the inlet and outlet of each single-cylinder filter, which can realize the detachment of the entire filter during the normal operation of the hydraulic system. sex. However, when a filter cartridge sends out a clogging alarm, the operator needs to go to the site to manually switch the valve to switch to another filter cartridge after discovering the monitoring alarm. In the working state, it cannot provide normal filtering work for the hydraulic system, and the pressure in the filter cartridge increases to a certain extent, which will also cause varying degrees of damage to the filter. [0003] At present, another type of hydraulic...

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Problems solved by technology

However, when a filter cartridge sends out a clogging alarm, the operator needs to go to the site to manually switch the valve to switch to another filter cartridge after discovering the monitoring alarm. In the working state, it cannot provide normal filtering work for the hydraulic system, and the pressure in the filter cartridge increases to a certain extent, which will also cause different degrees of damage to the filter

[0003] At present, another type of hydraulic system design is to use a double-tube filter. The disassembly and assembly problem during the normal operation of the hydraulic system is hardly considered. This often has certain potential safety hazards. Once the filter device fails, it must be Disassembly and maintenance can only be carried out by stopping the operation of the hydraulic system, which affects the normal operation of the entire project and causes considerable economic losses

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