Overheating self-closing valve

Abstract

The invention relates to the field of valves, and discloses an overheat self-closing valve comprising a valve body and flow channels arranged on the both sides of the valve body. The valve body is internally provided with a cylindrical valve chamber, and the flow channels are located at the eccentric positions of the circumferential surface of the valve chamber, and communicate with the valve chamber which is internally provided with a cylindrical valve core matched with the valve chamber; the valve core is made of heat conduction materials, and rotatably connected to the interior of the valvechamber; the valve core is provided with through holes of which the positions are corresponding to the flow channels; the valve chamber is circumferentially provided with a strip-shaped groove whichis parallel with the valve core, and the width of the strip-shaped groove is smaller than the thickness of the valve core; the circumferential surface of the valve core is fixedly provided with a stopblock slidably connected to the interior of the strip-shaped groove, and an expansion and contraction body which can be used for driving the valve core to rotate circumferentially is arranged betweenthe stop block and the inner wall of the strip-shaped groove; the expansion and contraction body is located in the strip-shaped groove, and made of shape memory alloy; and the expansion and contraction body is extended or shortened after the expansion and contraction body reaches phase-transition temperature, and abuts against the valve core. The invention aims to provide a valve for automatically cutting off the supply of cooling water when the temperature of the cooling water is too high.

Description

technical field [0001] The invention relates to the field of valves. Background technique [0002] In the injection molding workshop, circulating cooling water plays a very important role. It is mainly supplied to chillers, injection molding machine oil coolers and barrel coolers for heat exchange (these devices can be called heat exchange from the perspective of heat exchange. device) to meet the temperature control requirements of the injection molding process and ensure the normal operation of the hydraulic system of the injection molding machine. [0003] At present, in most injection molding machine production workshops, the water supply pump supplies cooling circulating water to each injection molding machine in the injection molding workshop at the same time. It often happens that the power of the water supply pump is too small, or the deviation of the pipeline resistance causes the injection molding machine far away from the water supply pump. The cooling water flow...

AI Technical Summary

Problems solved by technology

[0004] Moreover, in the prior art, an advanced electrical control system is usually used to control the cooling water of a single injection molding machine, but the electrical control system requires high maintenance technology, and the burden on small and medium-sized enterprises is heavy, so it is rarely used at present.

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