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Drain pipe fittings and their application in railway construction

A technology for drainage pipe fittings and drainage blind pipes, which is applied in the directions of drainage, pipe components, pipes/pipe joints/pipes, etc., can solve the problems that railway tunnel collection and drainage projects cannot be used, steel is not resistant to corrosion, etc., and achieves improved weather resistance and acid resistance. The effect of strong corrosion resistance and improved stability

Active Publication Date: 2018-09-18
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steel is a material that is not resistant to corrosion, coupled with the stress impact of repeated vibrations, it cannot be used in the drainage works of railway tunnels

Method used

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  • Drain pipe fittings and their application in railway construction
  • Drain pipe fittings and their application in railway construction
  • Drain pipe fittings and their application in railway construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A blind drain pipe is a multi-layer structure composed of an inside-out anti-crystallization coating 9, an inner wall drainage layer 2, an outer wall structure layer 1, and a filter layer. The drain blind pipes are connected by components.

[0042] The main resin of the outer wall structure layer is low-density polyethylene, high-density polyethylene, and EVA. The components and proportions are shown in Table 1. The main resin of the inner wall drainage layer is high-density polyethylene (HDPE), and the components and proportions are shown in Table 1. Table 2 (All formulas are parts by mass).

[0043] The proportion of the reinforcing agent in the outer wall component is: high density polyethylene 12, alkali-free glass fiber 20, ultra-fine talc powder 25, ABS high rubber powder 10, paraffin wax 5, graphene oxide 10, and silane coupling agent 0.8 , Stearic acid 1, elastomer POE 10.

[0044] The outer wall structure layer and the inner wall drainage layer are molded from raw ma...

Embodiment 2

[0047] A blind drain pipe is a multi-layer structure composed of an inside-out anti-crystallization coating 9, an inner wall drainage layer 2, an outer wall structure layer 1, and a filter layer. The drain blind pipes are connected by components. The main resin of the outer wall structure layer is low-density polyethylene, high-density polyethylene, and EVA. The components and proportions are shown in Table 1. The main resin of the inner wall drainage layer is high-density polyethylene (HDPE). The components and proportions are shown in the table. 2. The outer wall reinforcement ribs and the outer wall structure layer are made of the same material.

[0048] The proportion of the reinforcing agent in the outer wall component is: high density polyethylene 15, alkali-free glass fiber 30, superfine talc powder 30, ABS high rubber powder 12, paraffin 6, graphene oxide 15, silane coupling agent 1.0, stearic acid 1.5, elastomer POE 15. The inner wall drainage layer 2 is coated with hy...

Embodiment 3

[0056] Punch design:

[0057] The material of Example 1 is used to make a double-wall corrugated pipe, and the diameter of the trough of the outer wall pipe is 80 mm. Every 10m long longitudinal blind drain pipe is connected to a horizontal water pipe, and the inner diameter of the horizontal water pipe is 100mm, then: the drainage area of ​​the horizontal water pipe S=πR 2 =3.1×52=78.5cm 2

[0058] The diameter of the longitudinal drainage pipe is 80mm, the circumference of the pipe trough

[0059] L=2πR=2×3.14×4cm=25.12cm

[0060] The upper third of the holes can be provided with a perforation of 25.12cm / 3=8.37cm. The sum of the lengths of the holes is less than this length; if all holes are opened at a trough, the water intake area and the drainage area of ​​the horizontal water pipe In the case of equal, the required trough width X=S / L=78.5 / 25.12=3.125cm.

[0061] Assuming: the width of the wave trough and the wave crest are both 5mm, and the hole is a long strip hole of 1cm×0.2cm...

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Abstract

The invention provides a drainage blind pipe and an assembly thereof. The drainage blind pipe is of a multilayer structure composed of an anti-crystallization coating, an inner wall drainage layer, an outer wall structure layer and a filtering layer from inside to outside. The interiors of the drainage blind pipe are connected through the assembly. According to the provided drainage blind pipe of the four-layer structure, the anti-crystallization coating can effectively prevent calcium carbonate and other crystals from being attached to the pipe wall, and pipe crystallization plugging is prevented; the inner wall and the outer wall adopt materials with different components and ratios, the material formula of the inner wall can enable the pipe wall smoothness to be high, the drainage capacity is improved, in addition, the stability is high, the acid resistance and the corrosion resistance are higher, and the weather resistance is also greatly improved; crystal whiskers, various solid fillers and multiple additives are added into the formula of the outer wall, the ring stiffness, the ring flexibility and other mechanical properties of the pipe can be effectively improved, and the flame resistance of the pipe is also improved; and the filtering layer can effectively prevent silt and other particles from entering the pipe, so that pipe silting is prevented.

Description

Technical field [0001] The invention belongs to the field of water supply and drainage, and specifically relates to a blind drainage pipe with a multilayer structure and its components. Background technique [0002] Drainage blind pipe is a multi-functional geotechnical product, which is light in weight, easy to cut, easy to construct and install. It is mainly used for collecting and draining water seepage to reduce groundwater pressure, remove excess water, and protect soil and buildings. Will not be damaged due to seepage deformation. The existing blind drain pipes are mainly made of plastic and steel. For example, the composite blind drain pipe proposed by patent CN1556289A is made of steel wire as a spring-type reinforced lining, and the wire-wrapping pipe wall is made of plastic extruded by an extruder. The silk is messed up during molding. The existing blind drainage pipe cannot meet the actual needs of railway construction. [0003] Railway tunnels are usually built in mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L11/20F16L9/18F16L55/24E21F16/02
CPCE21F16/02F16L9/14F16L9/18F16L11/005F16L11/20F16L55/24
Inventor 马伟斌林传年郭小雄付兵先马超锋王姣柳墩利张伟安哲立王志伟常凯邹文浩李尧张文达
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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