Manufacturing method of one-way solenoid valve
The utility model relates to an electromagnetic valve, in particular to an electromagnetic valve in which the medium can only flow in one direction from the inlet to the outlet.
The application of solenoid valve in automatic production, the closing of valve core depends on the pressure of medium, and some also depends on their own gravity, spring elasticity or both. When the pressure at the outlet end of the solenoid valve is greater than a certain value at the inlet end, backflow will occur. For example, in the liquid tank temperature control device, the steam and cold water flowing into the heat exchanger are controlled by two solenoid valves. When the pressure of steam and cold water is different, they will enter each other's pipe.
At present, the common method to solve this problem in industry is to add a check valve (or check valve) after the solenoid valve.
The utility model aims to omit the separate check valve, and provides a one-way solenoid valve with simple structure, which is suitable for industrial pipelines. The idea is like this. Because the switch of the solenoid valve control medium usually only uses one side of the valve hole connecting the inlet and outlet, that is, one side of the valve hole to make the main valve seat, and the main valve core driven by the solenoid actuator leaves or contacts to achieve the control purpose, the other side of the valve hole can be used as the check payment. The valve seat can save a single valve body through a suitable check valve element.
The further idea is to select the structure of the check valve core as the combination of the valve disc and the valve disc. The valve hole is usually circular and can be fully used as a guide element. The valve includes more than three hollow claws, which can slide in the valve hole at the periphery of the same garden column. The valve plate is connected with the valve and can be closely connected with the pay valve seat. When the main valve core leaves the main valve seat, the medium will flush the check valve core and flow out from the gap of the valve disc. When the main valve core is pressed against the main valve seat, the check valve core is pressed against the auxiliary valve seat under the force of gravity or spring, preventing the backflow of the medium. In order to improve the sealing performance, the valve plate and valve can also be separated, and the soft sealing ring can be clamped in the middle before tightening.
The utility model has the advantages of simple and compact structure, making full use of both sides of the valve hole, saving the high cost valve body, saving the guide element and reducing the axial size. Therefore, the utility model has the advantages of less space occupation, simple installation and low cost.
