Polyethylene fabric composite concrete guniting pipe

Abstract

The invention discloses a polyethylene fabric composite concrete guniting pipe. The guniting pipe comprises a pipe body and a wear-resisting layer located on the inner wall of the pipe body, at leasttwo layers of reinforcing fiber fabric winding layers are compounded in the pipe body, and the winding directions of the adjacent reinforced fiber fabric winding layers are opposite; and the wear-resistant layers are adopted one or more materials of polyethylene modified materials, polyethylene nano materials and wear-resistant rubber to mixed at any ratio. According to the guniting pipe, at leasttwo layers of reinforcing fiber fabric winding layers are compounded in the pipe body, so that a net-shaped reinforcing structure is formed, and the internal pressure bearing capacity of the concreteguniting pipe is improved; due to the fact that the pipe body is not made of the rubber, the elasticity is not large, and therefore the pipe body can be used for bearing certain pressure for the reinforcing fiber fabric winding layers, the reinforcing fiber fabric winding layer does not need too many layers, and the production cost of the guniting pipe is reduced; and the wear-resistant layer isfurther added on the inner wall of the guniting pipe, and the wear-resistant layer is made of a material with good wear resistance so as to resist the abrasion of a solid-liquid mixture to the pipe wall when concrete is conveyed.

Description

technical field [0001] The invention relates to a concrete spraying pipe, in particular to a polyethylene fabric composite concrete spraying pipe. Background technique [0002] Traditional concrete spray pipes generally use rubber pipes with steel wire reinforcement in the pipe wall. The concrete conveyed by the concrete spray pipe is a mixture of liquid and solid. This fluid wears a lot on the pipe wall. At the same time, the pressure in the spray pipe is very high due to the long lift of the concrete sprayed by the spray machine. , Such conditions of use require that the spray pipe must have good wear resistance and pressure bearing capacity. Although the traditional rubber spray pipe has a certain wear resistance and can withstand relatively high pressure, the rubber spray pipe is prone to cracking after being worn to a certain extent during long-term use, which leads to aggravated damage process of the pipe. At the same time, the aging problem of the rubber itself has ...

AI Technical Summary

Problems solved by technology

Although the traditional rubber spray pipe has a certain wear resistance and can withstand relatively high pressure, the rubber spray pipe is prone to cracking after being worn to a certain extent during long-term use, which leads to aggravated damage process of the pipe. At the same time, the aging problem of the rubber itself has an impact on the storage and use of the tube.

In addition, due to the good elasticity of rubber, the ability to withstand pressure is limited, so that the function of the rubber spray pipe to withstand internal pressure is mainly borne by the steel wire reinforcement layer in the middle of the pipe wall, which puts forward higher requirements for the strength of the steel wire reinforcement layer. , which virtually increases the cost of the enhancement layer

In order to avoid the above problems, rubber spray pipe manufacturers generally modify the rubber used on the inner wall of the spray pipe to improve wear resistance, and thicken the steel wire reinforcement layer to improve the pressure bearing capacity, which makes the cost of the rubber spray pipe high.

To sum up, because the traditional shotcrete pipe is expensive and has a short service life, there is a need for a concrete shotcrete pipe with lower cost and higher cost-effectiveness in the market

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