Backwash filtering equipment and backwash filtering method thereof

Abstract

The invention discloses backwashing filtering equipment which comprises a valve body, a valve rod is arranged in the valve body in the vertical direction, a compression spring is arranged at the lower end of the valve rod, the upper end of the compression spring is clamped with the valve rod, and a spring clamping seat is arranged at the lower end of the compression spring; an oil guide gap is formed between the lower end of the valve rod and the spring clamping seat; an oil port A, an oil port B, an oil port C and an oil port D are sequentially formed in the valve body from top to bottom in the horizontal direction; an oil inlet and a filter element A are further arranged at the two ends of the valve body respectively, a filter element B is arranged below the filter element A, and an oil guide port is formed in the lower end of the filter element B and communicates with one end of the oil port D; and an oil outlet is formed in the bottom of the valve body and communicates with the other end of the oil port D. The invention further discloses a backwash filtering method, the problem that a handle of an existing backwash filtering device is difficult to shift in a high-pressure system is solved, and the problem that an existing backwash device is poor in backwashing effect in a low-pressure system is also solved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic systems, and relates to backwashing and filtering equipment. The invention also relates to the above-mentioned backwashing and filtering method using the above-mentioned equipment. Background technique [0002] The existing backwash filter generally uses a ball valve to complete the work, but in a high-pressure system, it becomes extremely difficult to move the handle of the ball valve, and sometimes it is even necessary to complete the working process of the backwash filter by knocking the handle. However, in a low-pressure system, such as a cooling system, when using a traditional backwash filter, its liquid outlet will still be open, which will cause the working medium to be diverted, greatly reducing the backwash effect. Contents of the invention [0003] The purpose of the present invention is to provide a kind of backwash filter equipment, which not only solves the problem that the handl...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of backwash filter equipment, which not only solves the problem that the handle of the existing backwash filter device is difficult to move in the high-pressure system, but also solves the poor backwash effect of the existing backwash filter device in the low-pressure system The problem

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