▲Announcement of Hunan Patent Award in 2021

Recently，Issued by Hunan Patent Award Committee《Decision on Commending the 2021 Hunan Patent Award》，Five new tunnels are installed“ Nozzle assembly of concrete shotcrete truck and concrete shotcrete truck”The patent project was awardedThe third prize of Hunan Patent Award。

▲2021 Hunan Province Patent Award Certificate

▲Wuxin Tunnel is equipped with the latest concrete wet spraying machineCHP30F

R & D background：The working space of concrete shotcrete truck is narrow.，The working angle is larger.，So that that requirement on the flexibility of the spray head of the concrete shotcrete truck is higher。

1In the prior art, the pumping hose of the concrete shotcrete truck is directly connected with the connecting pipe of the spraying device，At the flange of the pumping HongEasy to bend，Produce fatigue；2Large bending angle of pumping hose，When pumping, the impact and friction of concrete on the pumping hose are large.，Easy to wear the inner wall of the hose；3Increased twist in the pumping hose，O that the stress of the spray head assembly is increased，ThusShorten the service life of the pumping hose and sprinkler assembly。

This invention breaks theThe monopoly situation of foreign high-end jet products and prices，It is a major technical breakthrough of intelligent tunnel construction equipment in China.，Intelligent construction equipment for tunnels in ChinaIt has good economic and social benefits.。

Wuxin will continue to focus on the field of tunnel constructionR & D and innovation of key and difficult technologies，Let the tunnel workSafer、More economical、More efficient！