Low-resistance check valve

Abstract

The invention discloses a low-resistance check valve and relates to a check valve, in particular to improvement on a check valve structure in the prior art. The low-resistance check valve is quick inswitching-on and switching-off response and small in action resistance. The low-resistance check valve comprises a valve seat and a valve clack, wherein the valve clack is arranged on the valve seat.The valve clack resets through a reset mechanism arranged on the valve seat. A twisting force mechanism is arranged between the valve clack and the valve seat, wherein the twisting force mechanism isused for accelerating opening and closing of the valve clack. According to the low-resistance check valve, by means of the twisting force mechanism, the switching-off speed of the check valve is accelerated, and in other words, the check valve is higher in switching-off response speed. When water comes, the check valve is switched on; each transmission force arm passes through a rolling wheel arranged at one end, and the rolling wheels are driven to slide along the side wall through the water pressure; the switching-on resistance is reduced, and the resistance formed when the check valve is switched on is reduced; and the switching-on speed is higher, the switching-on time is shorter, and in other words, the response speed of the check valve is increased.

Description

technical field [0001] The invention relates to a check valve, in particular to an improvement on the structure of the check valve in the prior art. Background technique [0002] The check valve is a commonly used check valve device in the liquid pipeline, which is used to prevent the liquid from flowing backward in the pipeline. However, when it is used, it is found that the water flow resistance is large when it is opened, the action process is slow, and the sealing performance is poor when it is closed. [0003] Aiming at the slow action process of the check valve in the prior art, a low-resistance check valve structure is provided in the prior art, for example, an invention patent (CN206159553U, a new Low-resistance check valve structure) utilizes one end of the valve seat to be evenly equipped with three sets of spring groups, and the spring groups provide axial sealing force for the disc, so that the check valve is in a normally closed state. When the disc moves axial...

AI Technical Summary

Problems solved by technology

[0004] But this kind of check valve still has some problems, one is that the action resistance of opening and closing is still relatively large; the other is that the check ability after closing is still lacking, and leakage occurs from time to time; the third is product maintenance , the replacement of rubber wearing parts is cumbersome

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