First, the structural design features (1) Whether the surrounding rock reinforcement, anchor injection support, or roadway repair grouting work great mobility, injection pump design explosion-proof, anti-static non-metallic materials, reducing the weight of the machine , Easy to carry, while meeting the special requirements of the coal mine work environment. (2) The whole structure adopts the large piston to directly drive the small piston, meanwhile, the reversing valve is directly installed on the large piston with compact structure. The two reversing valves are of flat sealing structure and are installed on the same bobbin with the same stroke, Open a valve at the same time, close the other valve, to achieve the purpose of fast-off gas. (3) In order to further improve the reliability of seals, the seals are made of Viton material. Second, the comprehensive performance analysis (1) Coal injection pumps are now used in general to explosion-proof motor-driven, although with good explosion-proof, but by the working environment and other conditions, each class must have a comprehensive security workers With the class, used to check the explosion-proof power distribution, virtually increase staff costs. (2) Grouting work liquidity is large, especially for rock reinforcement work, greater mobility, so for machine weight only 16kg QYB03 grouting pump, compared to machine weight 100 ~ 200kg electric grouting pump More flexible. (3) At present, large and medium-sized coal mine tunnels in our country are all covered with standard compressed air pipelines, which can meet the need of pneumatic grouting. There is no need to re-lay other power pipelines without additional investment costs. This QYB03 type grouting pump large area promotion provides a good convenience. Through years of practice, the QYB03 portable grouting pump has the characteristics of stable and reliable performance, light weight and convenient carrying. Compared with other types of grouting pumps in the market (see Table 1), QYB03 has the advantages of economy and safety.