Recently, the Hunan Provincial Patent Award Committee issued the "Decision on Commending the 2021 Hunan Patent Award". The nozzle assembly of a concrete shotcrete truck installed in Wuxin Tunnel and the patented project of the concrete shotcrete truck won the third prize of the Hunan Patent Award.

Announcement of the 2021 Hunan Patent Award

2021 Hunan Patent Award Certificate

The latest concrete wet spraying machine CHP30F installed in Wuxin Tunnel

Research and development background: The working space of the concrete shotcrete truck is narrow and the working angle is large, which makes the flexibility of the spray head of the concrete shotcrete truck higher.

In the prior art, the pumping hose of the concrete shotcrete truck is directly connected with the connecting pipe of the spraying device, and the flange of the pumping hose is easily bent, resulting in fatigue;

The pumping hose has a large bending angle, and the concrete has a large impact and friction on the pumping hose during pumping, which is easy to wear the inner wall of the hose;

The increased twisting of the pumping hose increases the stress on the spray head assembly, thereby shortening the service life of the pumping hose and spray head assembly.

This invention breaks the foreign monopoly of high-end jet machine products and prices. It is a major technological breakthrough in China's tunnel intelligent construction equipment, and has good economic and social benefits for my country's tunnel intelligent construction equipment.

Wuxin will continue to focus on the research and development and innovation of key and difficult technologies in the field of tunnel construction to make tunnel construction safer, more economical and more efficient!Editor/Zhao E