A multi-stage sealed refrigeration valve

Abstract

The invention relates to the technical field of refrigeration valves, and discloses a multi-stage sealed refrigeration valve, including a valve pipe, a partition layer, and a valve. The middle part of the valve pipe is fixedly connected with a valve seat, and the top of the valve seat is provided with an electric cavity, the top of the electric control cavity is fixedly connected with an electromagnet, the center of the bottom of the valve seat is provided with a safety cavity, the valve stem is movably sleeved in the safety cavity, and the middle part of the valve stem is fixedly connected with a squeeze The pressing plate is fixedly connected with a magnet at the bottom end of the valve stem. The invention uses the designed valve stem, limit ring and seal ring II to make the valve stem squeeze the limit ring through the extrusion plate when the refrigeration valve is in operation and the valve stem is lifted up, so that the seal ring II is squeezed And stretching, so that the sealing ring II is not affected by thermal expansion and contraction, so that the sealing ring II is close to the valve stem, and the extrusion plate is close to the limit ring, thus avoiding the cold medium affecting the components during the operation of the refrigeration valve Conditions that lead to shrinkage leaks.

Description

technical field [0001] The invention relates to the technical field of refrigeration valves, in particular to a multi-stage sealed refrigeration valve. Background technique [0002] The refrigeration valve is a small flow, hard-sealed, normally closed solenoid valve. The refrigeration valve is mainly used for defrosting, flow direction control and on-off control of the refrigeration system, which makes the temperature difference between the internal working environment of the refrigeration valve and the external environment Larger, resulting in the long-term operation of the refrigeration valve, affected by the movement friction of the valve body and thermal expansion and contraction, resulting in friction gaps and shrinkage gaps in the sealing sleeve, valve stem, valve cover, etc., resulting in a decrease in the overall sealing performance and occurrence of Leakage affects the normal operation of the refrigeration system, and this leakage is small at the beginning and is no...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the use of the existing refrigeration valves proposed in the background technology, the present invention provides a multi-stage sealed refrigeration valve, which has the functions of squeezing the sealing ring when the valve is opened, stretching the sealing ring tightly, and reverse leakage circuit. The advantages of turning on the extrusion valve, leakage of the leakage warning block, and tightness of the second level of leakage have solved the technical problems in the above-mentioned background technology that the thermal expansion and contraction cause the sealing performance to decrease, the leakage is not easy to find, and the leakage leads to waste of raw materials.

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