90 The truck-mounted hydraulic wet concrete spraying machine is an efficient concrete construction equipment. It uses a truck as a carrier, has strong mobility, and can quickly reach the construction site. It is driven by a hydraulic system and can accurately control the delivery of concrete and the addition of accelerators. When working, the mixed concrete is sent into the hopper, and then sent to the nozzle along the delivery pipeline by the concrete pump. At the same time, the accelerator is added in proportion, and then the concrete is sprayed onto the construction surface by the nozzle. The equipment has high spraying efficiency and good quality, and can effectively reduce dust pollution. It is widely used in tunnels, mines, slope protection and underground engineering, etc., which can improve construction efficiency and ensure construction safety and quality.