Multi-stage sealing refrigeration valve

Abstract

The invention relates to the technical field of refrigeration valves, and discloses a multi-stage sealing refrigeration valve which comprises a valve pipe, a partition layer and a valve body. A valve seat is fixedly connected to the middle of the valve pipe, an electric control cavity is formed in the top of the valve seat, an electromagnet is fixedly connected to the top end of an inner cavity of the electric control cavity, and a safety cavity is formed in the center of the bottom of the valve seat. A valve rod is movably connected in the safety cavity in a sleeved mode, an extrusion plate is fixedly connected to the middle of the valve rod, and a magnet is fixedly connected to the bottom end of the valve rod. According to the multi-stage sealing refrigeration valve, through the designed valve rod, a limiting ring and a sealing ring II, when the refrigeration valve operates and the valve rod is lifted up, the limiting ring can be extruded through the extrusion plate, so that the sealing ring II is extruded and stretched, the sealing ring II is not affected by thermal expansion and cold contraction, the sealing ring II is tightly attached to the valve rod, the extrusion plate is tightly attached to the limiting ring, and therefore the situation of cold contraction leakage caused by the fact that cold media influence all parts in the operation process of the refrigeration valve is avoided.

Description

Technical field [0001] The present invention relates to the field of refrigeration valve, in particular a multi-stage sealed refrigeration valve. Background technique [0002] The refrigeration valve is a small flow, hard seal, a normally closed solenoid valve, and the refrigeration valve is mainly used for the refrigeration system, flow control, and interworking control, such that the internal working environment of the refrigeration valve is different from the external ambient temperature. Larger, resulting in a long-term operation, affected by the valve body movement, the influence of the thermal expansion, the friction clearance, the stem, the valve cover, etc., resulting in a decrease in overall sealing, occurrence Leakage, affecting the normal operation of the refrigeration system, and this leak is small, it is not easy to discover, which causes waste of raw materials. Inventive content [0003] In response to the shortcomings of the existing refrigeration valve proposed i...

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 o...

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