Mechanical automatic reversing valve and using method thereof

Abstract

The invention relates to a mechanical automatic reversing valve and a using method thereof, and belongs to the technical field of reversing valves. The mechanical automatic reversing valve is used for automatically controlling the running direction of an executing mechanism and comprises a valve body, a reversing valve element, a one-way valve I, a one-way valve II, a pressure regulating valve I and a pressure regulating valve II. The valve body is provided with an oil supply port P correspondingly communicated with a high-pressure oil supply pipe of a hydraulic system, an oil return port T correspondingly communicated with an oil tank of the hydraulic system, a connecting port A correspondingly communicated with one piston cavity of the executing mechanism and a connecting port B correspondingly communicated with the other piston cavity of the executing mechanism; a valve element cavity is formed in the valve body, and the reversing valve element used for switching the corresponding communication relation between the connecting port A and the connecting port B and between the oil supply port P and the oil return port T is installed in the valve element cavity. The valve body is internally provided with an oil path C which enables the connecting port A to be correspondingly communicated with one end of the valve element cavity. According to the mechanical automatic reversing valve and the using method thereof, the structure is simple, the failure rate is low, the purpose of automatic reversing of the reversing valve element can be achieved, and therefore the executing mechanism can be controlled to do automatic reciprocating motion.

Description

Technical field [0001] Technical Field The present invention relates to a valve, particularly to a machine and method of using the automatic valve. Background technique [0002] Known, generally require operation of the telescopic cylinder valve control, the current into the solenoid valve and the manual valve valve; solenoid valve requires the use of power supply, but the power supply field operations troublesome, increase the weight of the first battery, the second wiring is relatively cumbersome, the scene can not use electromagnetic valve, the valve can only manually, resulting in increased labor work and the operation is also difficult to grasp, low operating efficiency; In addition, electromagnetic transducer the valve needs and with the use of electric induction switch in order to meet the job requirements, the need to increase various relays, leading to a high failure rate, this phenomenon is skilled in the art problems to be solved; [0003] China Patent (Publication No....

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Problems solved by technology

[0002] It is known that a reversing valve is usually required to control the telescopic operation of the hydraulic cylinder. At present, the reversing valve is divided into an electromagnetic reversing valve and a manual reversing valve; the electromagnetic reversing valve needs to use a power supply, but the power supply is troublesome when working in the field. The weight of the first battery pack is increased, and the second wiring is also more troublesome. The electromagnetic reversing valve cannot be used on site, and only a manual reversing valve can be used, resulting in increased manual workload and difficult operation, and low operating efficiency; In addition, the electromagnetic reversing valve The directional valve needs to be used in conjunction with the electric induction switch to meet the work requirements, and various relays need to be added, resulting in a high failure rate. This phenomenon is an urgent problem to be solved by those skilled in the art;

[0003] Chinese patent (publication number: CN209354694U) discloses a fluid automatic control reversing device. The cover is sealed and connected to both ends of the valve body; the adjustment rod is connected to both ends of the valve core, one on the left and one on the left, and the upper end surface of the side cover of the valve body is provided with a controller oil port, an external control oil port X, and an external drain port Y They are respectively located on both sides of oil ports P, T, A, and B, and communicate with the controller oil port on the side cover; the adjustment rod controls the stroke of the spool, and the relative position of the spool and the oil groove controls the flow direction and direction of the oil. The flow rate requires the oil pressure of external control oil port X and external oil drain port Y to make the controller reversing to achieve the purpose of actuator reversing. The structure is complex and the failure rate is high.

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