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Drainage blind pipe and assembly thereof

A technology for drainage blind pipes and components, which is applied in the direction of drainage, pipe components, pipes/pipe joints/fittings, etc. It can solve the problems that railway tunnel collection and drainage projects cannot be used, and steel materials are not corrosion-resistant, so as to achieve improved weather resistance, acid resistance and corrosion resistance. Strong corrosion resistance and strong stability

Active Publication Date: 2017-05-24
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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  • Drainage blind pipe and assembly thereof
  • Drainage blind pipe and assembly thereof
  • Drainage blind pipe and assembly thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A drainage blind 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, and the drainage blind pipes are connected by components.

[0042] The main resins of the outer wall structure layer are low-density polyethylene, high-density polyethylene, and EVA, and the ingredients and ratios are shown in Table 1; the main resin of the inner wall drainage layer is high-density polyethylene (HDPE), and the ingredients and ratios are shown in Table 1. Table 2 (all are parts by mass in the formula).

[0043]The mass ratio of reinforcing agent in the outer wall component is: high-density polyethylene 12, alkali-free glass fiber 20, superfine talc powder 25, ABS high rubber powder 10, paraffin wax 5, graphene oxide 10, 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 f...

Embodiment 2

[0047] A drainage blind 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, and the drainage blind pipes are connected by components. The main resins of the outer wall structure layer are low-density polyethylene, high-density polyethylene, and EVA, and the ingredients and ratios are shown in Table 1; the main resin of the inner wall drainage layer is high-density polyethylene (HDPE), and the ingredients and ratios are shown in Table 1. 2. The outer wall stiffener and the outer wall structural layer are made of the same material.

[0048] The mass ratio 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 wax 6, graphene oxide 15, silane coupling agent 1.0, stearic acid 1.5, elastomer POE 15. The inner wall drainage layer 2 is coated...

Embodiment 3

[0056] Hole design:

[0057] Using the materials in Example 1, a double-wall corrugated pipe was made, and the diameter of the trough of the outer wall pipe was 80 mm. Every 10m long vertical drainage blind 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, and the circumference of the trough of the pipe

[0059] L=2πR=2×3.14×4cm=25.12cm

[0060] The upper third of the hole can provide a perforation perimeter of 25.12cm / 3 = 8.37cm. The sum of the lengths of the perforations is less than this length; In the same situation, the required trough width X=S / L=78.5 / 25.12=3.125cm.

[0061] Assume that the width of both the trough and the crest is 5mm, and the hole is a long hole of 1cm×0.2cm, then the number of troughs on the drainage pipe with a unit length of 1m is 1m / 10mm=100,

...

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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 in particular relates to a drainage blind pipe with a multi-layer structure and components thereof. Background technique [0002] Drainage blind pipe is a multifunctional geotechnical product, which is light in weight, easy to cut, and convenient to construct and install. It is mainly used to collect water seepage in the drained soil, reduce groundwater pressure, remove excess water, and protect soil and buildings. It will not be damaged by osmotic deformation. The material of the existing drainage blind pipe is mainly plastic and steel, such as the composite collection and drainage blind pipe proposed by the patent CN1556289A, which is made of spring-type reinforced lining with steel wire, and its messy wire pipe wall is plastic extruded by an extruder. Filament and scrambled when forming. The blind drainage pipes of the prior art cannot meet the actual needs of railway constructio...

Claims

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Application Information

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Patent Type & Authority Applications(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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