Filtering check valve and side block with same

Abstract

The invention relates to a filtering check valve and a side block with the filtering check valve. The filtering check valve is used on a spray gun for spraying rapid solidification materials such as polyurethane foam and polyurea. The invention aims to solve the problem that the side block is difficult to disassemble and easy to damage. In order to achieve the purpose, a side sealing box and a filtering check valve in the side block are each provided with an O-shaped ring which is matched with a side block shell in a sealing mode, the installation positions of the O-shaped rings are closer to fluid than threads, and therefore the fluid cannot make contact with the threads at the fixing positions of the side sealing box, the filtering check valve and the side block shell. Therefore, the problem of thread adhesion caused by crystallization and solidification of components such as resin or isocyanate at the thread is solved, so that the thread is very labor-saving to disassemble, and the thread is not damaged.

Description

technical field [0001] The invention relates to a filter check valve and its side block, which is used on a spray gun for spraying polyurethane foam, polyurea and other fast-setting materials. The A component of polyurethane foam, polyurea and other materials is isocyanate, and the B component is a pre-formulated compound, which includes polyether resin, catalyst, surfactant and blowing agent. After the isocyanate or resin crystallizes and solidifies, it is very strong and has a strong viscosity. Background technique [0002] Known spray guns for spraying materials such as polyurethane foam or polyurea have a pair of side blocks for distributing components A and B to the gun, but the fluid often contacts the side seal box, filter check valve and side The thread in the fixed position of the block shell makes the isocyanate or resin crystallize and solidify on the thread, which requires a very large labor intensity during disassembly, which often causes damage to the thread o...

AI Technical Summary

Problems solved by technology

[0002] Known spray guns for spraying materials such as polyurethane foam or polyurea have a pair of side blocks for distributing components A and B to the gun, but the fluid often contacts the side seal box, filter check valve and side The thread in the fixed position of the block shell makes the isocyanate or resin crystallize and solidify on the thread, which requires a very large labor intensity during disassembly, which often causes damage to the thread of the side block

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