Valves are widely used in fluid control (hydraulic, pneumatic) in various technical fields. Two-position two-way valves are one of them and are well known. At present, the two-position two-way valve adopts one-way control, which is a single inlet and a single outlet, and the general import outlet is fixed. Therefore, when it is installed and used, it must be installed in strict accordance with the orientation of the inlet and outlet, which greatly limits its application fields. And the scope of application.
Two-position two-way two-way pressure control valve structure
The utility model comprises a valve body, a valve cover and a base disposed at upper and lower ends of the valve body, a valve cavity A is arranged longitudinally in the valve body, and a valve stem is arranged in the valve cavity A to be movable up and down, and the valve body on both sides of the valve cavity A corresponds to The air port A and the air port B are provided, and the valve rod between the air port A and the air port B is provided with a sealing ring; the upper part of the valve cover is laterally provided with a receiving cavity, and the two ends of the receiving cavity are respectively provided with a nozzle A and a nozzle B, and the nozzle A valve core is arranged between A and the nozzle B, a valve chamber B is arranged in the lower part of the valve cover, the valve chamber B is in communication with the accommodating chamber, the valve chamber B is coaxially arranged with the valve chamber A, and a piston and a piston are arranged in the valve chamber B. Compared with the upper end of the valve stem, a return spring is arranged between the lower end of the valve stem and the base; the air port A communicates with the air nozzle A, and the air port B communicates with the air nozzle B.
Further, the air holes A and the air holes B are correspondingly arranged on both sides of the valve body, and the air holes C and the air holes D are correspondingly arranged on both sides of the valve cover, the air holes A communicate with the air holes C, the outer ends of the air holes A communicate with the air port A, and the outer ends of the air holes C It communicates with the nozzle A; the air hole B communicates with the air hole D, the outer end of the air hole B communicates with the air port B, and the outer end of the air hole D communicates with the air nozzle B. An adjusting screw is arranged in the base, and a return spring is arranged between the lower end of the valve stem and the adjusting screw.
The advantages are:
The internal structure is symmetrically arranged. When in use, the port A and the port B can be the air inlet and the air outlet or the air outlet and the air inlet respectively, that is, the two-way air inlet can be used, and the air inlet and the air outlet can be replaced with each other, which greatly expands the width. The field of application and the scope of application of the present invention. Compact structure, reasonable setting and high air tightness.