Water from the coal wall tubing and external cavity tubes sealing device. Lumen tube tunnel injection nozzle front end sealing device is connected to the tube after the nozzle, pipe tail pipe handle, suit in the lumen of the outer tube front end cone nut after nut cone with rubber Soft Case 8,9 coal and steel jacket water sealing, a steel sleeve outer tube connected after 9, the outer tube outer tube rear handle. The utility model can effectively reduce coal dust. Service system 1, in order to ensure high reliability and advanced systems were chosen selection of domestic and international high-quality brand-name products. 2, the product performance testing of rubber expansion pipe water sealing device, we sincerely invited users to visit the whole process of the product, all performance checks, was confirmed to be qualified before packing shipments. 3, in the same competitive conditions, our company not to reduce product on the basis of technical performance, change the product on the cost of parts, in good faith in the most favorable price to your party. Mine water sealing device, Ningde water sealing device, Bo-Bo-rubber provided by Hengshui Rubber Products Limited. Hengshui Bo-Rubber Products Co., Ltd. (www.jxboguang.com/) strong, credible, Hebei Hengshui transportation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Bo-Rubber and you hand into the brilliant, for a better future!