A one-way flow valve

Abstract

The invention discloses a one-way flow valve. The one-way flow valve comprises a valve body, a main valve core, a throttling sheet, a threaded sleeve and a spring assembly, wherein the valve body is provided with an oil port A and an oil port B, and the oil port B comprises a first flow through hole and a second flow through hole which are located in the side wall of the valve body; the main valvecore is glidingly arranged in the valve body, a flow through cavity and a first flow channel which communicate with each other are formed in the main valve core, a first flow through groove and a second flow through groove are formed in the outer wall of the main valve core, opening size of the first flow through hole can be controlled by the first flow through groove and whether the second flowthrough hole and the oil port A communicate with each other or not can be controlled by the second flow through groove when the main valve core moves up and down; a throttling hole is formed in the center of the throttling sheet; the threaded sleeve is connected to the upper part of the valve body in a sleeving manner, and an installing cavity is formed between the threaded sleeve and the valve body; the spring assembly is arranged in the installing cavity and is configured to overcome different spring acting forces when the main valve core moves upwards and downwards. The one-way flow valve has the advantages that a one-way valve and a throttling valve are integrated, the structure is reasonable and compact, and flow resistance is low.

Description

technical field [0001] The invention relates to the technical field of hydraulic valve manufacturing, in particular to a one-way flow valve. Background technique [0002] The function of the ordinary one-way valve is to make the hydraulic oil flow in one direction only, and it is not allowed to flow backwards. The function of the ordinary throttle valve is to control the flow of the fluid by changing the throttle section or length If the flow valve and check valve are connected in parallel, they can be combined into a one-way flow valve, that is, the one-way valve can be opened in a specific direction without throttling effect, and the one-way valve cannot be opened in the direction opposite to the specific direction, and can only flow out from the throttle valve. , has a throttling effect. The current general one-way flow valve is basically composed of two components, a valve sleeve with the function of a one-way valve and a valve core with a throttle hole. This kind of on...

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Problems solved by technology

Although the above-mentioned patent can realize the one-way throttling function, when throttling, it only changes the size of the flow area and has no pressure compensation function. When the load changes, the output flow changes greatly; and when the one-way function is realized, the oil also To flow through the throttling groove, the flow resistance is relatively large, so it is not suitable for use in low-pressure hydraulic systems

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