Check valve

Abstract

The embodiment of the invention relates to a check valve. The check valve comprises a valve sleeve and a valve body. The valve sleeve comprises a valve sleeve body, a valve sleeve clamping groove, a limiting ring, valve sleeve sealing grooves and first sealing rings, wherein the valve sleeve clamping groove is formed in the inner side wall of the valve sleeve body, the limiting ring is located on the inner side wall of the portion in front of the valve sleeve clamping groove, the valve sleeve sealing grooves are formed in the two ends of the valve sleeve, and the first sealing rings are held in the valve sleeve sealing grooves. The valve body comprises a locating ring, a second sealing ring, a blocking piece, valve body clamping sleeves and a valve element. The locating ring abuts against the inner side of the limiting ring, a first groove is formed in the top of the locating ring, and a second groove is formed in the inner side of the locating ring. The second sealing ring is held in the first groove of the locating ring. The blocking piece comprises a through hole and is inserted into the second groove in a connected mode. The valve body clamping sleeves are located on the inner side of the blocking piece and abut against buckle rings on the outer side walls of the valve body clamping sleeves. The valve element comprises a first connecting portion, a second connecting portion and a spring. The first connecting portion comprises an abutting portion and a first connecting rod, wherein the abutting portion abuts against the through hole of the blocking piece. The second connecting portion comprises a fixing rod and a second connecting rod, wherein the fixing rod and the second connecting rod are connected with each other, the fixing rod and the valve body clamping sleeves are fixed, and the second connecting rod sleeves the first connecting rod in a connected mode. The spring sleeves the outer side of the second connecting rod in a connected mode.

Description

technical field [0001] The invention relates to the field of water supply equipment, in particular to a check valve. Background technique [0002] At present, in the check valve installed at the outlet of the elliptical flange pump, the technology used is the check valve connected by the internal thread thread, and the front and rear connections need to add various fittings such as wires and unions. In order to achieve the sealing purpose of the threaded connection, it is necessary to process and manufacture a special sealing tapered pipe thread, and at the same time, it is necessary to wind the hemp rope and the raw material tape on the thread. There are still many problems and deficiencies in the above products, especially in the processing of tapered pipe threads. If the processing accuracy is not up to standard, it will easily cause poor sealing effect, difficult installation and water leakage. For water supply equipment composed of multiple pumps, if a check valve is d...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a check valve. Through this technical solution, not only can the complex installation, poor sealing performance and easy water leakage after assembly be solved in the production process, but also practical problems such as inconvenient maintenance and high labor intensity can be solved.

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