a shut-off valve

Abstract

The invention discloses a stop valve. The stop valve comprises a cavity and a lantern ring, wherein the cavity is defined by assembled a valve seat and a valve element; the lantern ring is mounted on the valve seat; the valve seat comprises a medium inlet and a medium outlet; a first sealing ring part located between the medium inlet and the medium outlet is arranged on the lantern ring; the valve core is located between the medium inlet and the medium outlet, and can coordinate with the first sealing ring part to switch on / off the medium inlet and the medium outlet; the stop valve is characterized in that a conical surface matched with the first sealing ring part is arranged on the valve element; the lantern ring is of normal pore diameter, normal inner wall thickness and a second pore diameter forming the first sealing ring part; the second pore diameter is smaller than the normal pore diameter; a radiating ring part which is in interval with the first sealing ring part is further arranged on the lantern ring. The two ring parts are arranged on the lantern ring of the stop valve, so that the radiating area can be effectively increased, the influence scope of thermal distortion can be reduced, and the stable sealing effect can be achieved.

Description

technical field [0001] The invention relates to the refrigeration field, and more specifically relates to an air conditioner cut-off valve. Background technique [0002] see figure 1 An existing cut-off valve structure is disclosed, which includes a cavity formed by assembling the valve seat 4 and the valve core 3 and a collar 7 installed on the valve seat. The valve seat 4 is provided with an upper Sealing surface A, the two ends of the valve seat 4 are respectively connected to the medium inlet connecting pipe 8 and the medium outlet connecting pipe 9, and the collar 7 in the cavity is provided with a lower sealing surface between the medium inlet and the outlet, Between the upper sealing surface A and the lower sealing surface, a valve core 3 that can generate displacement is arranged to divide the cavity into an upper chamber C and a lower chamber D, and the valve core 3 is respectively provided with the upper sealing surface A. Fitting taper and lower sealing face fit...

AI Technical Summary

Problems solved by technology

Otherwise, the deviation of the coaxiality of the collar 3 is too large, or the large deformation caused by heat during welding may cause the collar and the valve core to not fit effectively, and the sealing effect cannot be achieved well, resulting in the failure of the stop valve

Of course, it is also possible to increase the closing torque of the spool to achieve closing and sealing. At this time, the risk of efficiency and life is inevitable.

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