China Plastics ›› 2022, Vol. 36 ›› Issue (1): 61-66.DOI: 10.19491/j.issn.1001-9278.2022.01.009

• Materials and Properties • Previous Articles     Next Articles

Design and manufacture of glass⁃fiber⁃reinforced PVC thermoplastic composite pipes for underground filling in coal mine

ZHANG Yunpeng1(), LIU Xiangwei1, WANG Zhiming1, ZHANG Zhao2, WANG Qingzhao1()   

  1. 1.School of Chemistry and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China
    2.Qingdao Haiju New Material Technology Co,Ltd,Qingdao 266590,China
  • Received:2021-07-21 Online:2022-01-26 Published:2022-01-21

Abstract:

In view of the poor wear resistance and difficulty of replacement of seamless steel pipes used in coal mine paste delivery, the glass?fiber?reinforced PVC thermoplastic composite pipes (PVC?RTP) were developed for the use in the underground filling of coal mine, and their part composition, connection mode, process flow and process parameters were introduced comprehensively. The performance of the pipes at a nominal pressure of 9.5 MPa was also detected. The results indicated that the pipe exhibited a blasting pressure of 38.95 MPa, which was 4 times greater than the nominal pressure. There is no crack occurring in the pipe under the test time of 100 h and test pressure of 14.25 MPa. There is no leakage at 11.4 MPa. After 1 000 h, the pipes showed no rupture and no leakage. At a nominal pressure of 11.4 MPa and a ΔP/PN ratio of 48 %, the number of cycles reached 12 000, and no rupture and leakage were observed. With the characteristics of light weight, high wear resistance, and strong corrosion resistant, the composite pipes can better meet the requirement for the transportation of coal mine paste.

Key words: pipeline, coal mine filling, thermoplastic composite pipe, process parameters

CLC Number: