Water pipe lined with thin-walled stainless steel pipe and production method

A technology for stainless steel pipes and tap water pipes, which is applied in the direction of pipes/pipe joints/fittings, pipes, rigid pipes, etc. It can solve the problems of easy collapse of pipe walls, achieve obvious energy saving effects, facilitate diameter reduction, and increase mechanical strength.

Active Publication Date: 2015-11-25
四川民生管业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the purposes is to solve the defect that the wall of the thin-walled stainless steel pipe used in China is easy to collapse

Method used

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  • Water pipe lined with thin-walled stainless steel pipe and production method
  • Water pipe lined with thin-walled stainless steel pipe and production method
  • Water pipe lined with thin-walled stainless steel pipe and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: see figure 1 Upper half, figure 2 upper semicircle, image 3 , Figure 5 , Figure 7 .

[0030] Embodiment 1 The tap water pipe lined with thin-wall stainless steel pipes includes: cement pipe 1 for conveying tap water, and the thin-wall stainless steel pipe lining pipe in the cement pipe adopts the following basic lining pipe W:

[0031] See figure 1 , the basic lining pipe W includes: ①The flow inner pipe 5 made of thin-walled stainless steel, the wall thickness of the flow inner pipe is t 5 Take 0.2-0.6mm; ② Fix the following frame 4 on the outer periphery of the flow-through inner tube: the ring and the connecting strip are made of thin-walled stainless steel strips. See figure 1 As shown in the upper half of the center, several evenly distributed parallel thin-walled stainless steel rings 4.1 perpendicular to X are arranged along the X direction of the frame axis, and the distance between two adjacent rings is L 4 =300-500mm. See figure 2 As ...

Embodiment 2

[0036] Example 2: see figure 1 lower half, figure 2 lower semicircle, Figure 4 , Figure 5 , Figure 7 .

[0037] This embodiment 2 is different from embodiment 1 except that the following features are all the same:

[0038] 1) see figure 2 As shown in the lower semicircle of the center line, the frame 4 is evenly distributed along the circumference of each ring to fix 8 thin-walled stainless steel wire connecting strips 4.2A in the X direction to connect the rings into an overall frame. See Figure 4 , wire diameter d 4 = 0.7-2mm.

[0039] 2) see figure 1 As shown in the lower half of the center line, several thin-walled stainless rings 4.1A that are uniformly distributed and parallel to X are arranged in the X direction of the frame 4. Except for the thin-walled stainless steel strips 4.1 at both axial ends, the middle ring Steel wires are used to make rings. The use of thin-walled stainless steel strip 4.1 at both ends is to facilitate the welding between adja...

Embodiment 3

[0040] Embodiment 3: see Figure 1-Figure 4

[0041] Present embodiment 3 is different from embodiment 1 except following feature, all the other are identical:

[0042] 1) Nominal outer diameter D W With cement pipe 1 nominal inner diameter D 1 The difference is 40-80mm, called the micro-reduced inner liner W Δ . Nominal outer diameter is D WΔ (See figure 1 ). 2) Cancellation of manufacturing method step 3) factory shrinkage in embodiment 1. Micro-diameter liner W Δ No reduction required. 3) Adopt the following steps 4) paint the inner wall of the cement pipe and the suit at the construction site, and replace step 4) of the production method in Example 1: 4) paint the inner wall of the cement pipe and the suit at the construction site: put the micro-diameter liner pipe W Δ Put it into the cement pipe, and then use a cement pump and an 18mm nozzle to fill the 20-40mm gap with cement mortar.

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Abstract

The invention relates to a water pipe lined with a thin-wall stainless steel pipe inside and a fabrication method of the water pipe. An inner overflowing pipe made of thin-wall stainless steel and an outer frame are arranged in a tap water cement pipe as a lining pipe, the frame is welded into one body by a plurality of circular rings and a plurality of connecting rods made of thin-wall stainless steel bands or steel wires; the outer diameter of the lining pipe is equal to or slightly less than that of the cement pipe, and the thickness of the inner pipe is 0.2-0.6 mm; the lining fabrication and diameter reduction are performed in the factory; lining coating, cement pipe coating and sheathing operation are carried out on a construction site; rounding is carried out in the construction site, then vibration combination, fold removal, end welding and segmental detection are performed; or the lining can be poured into a whole in the factory and then is transported to the construction site; the frame is used to achieve high mechanical strength and thin walled pipe collapse prevention; the friction force between the lining and the cement pipe is large, so that displacement between the pipes is prevented; the frame has elasticity, so as to be convenient for diameter reduction and cement pipe assembly; and less stainless steel is used, therefore, low expense is achieved. The water pipe with stainless steel lining under the condition of same diameter has high speed and high water volume, the water resistance is reduced by 80%, and the energy is saved by more than 4*10<6> Kw.h every day. The process ensures no collapse of the thin walled pipe under negative pressure, and can be used for a PCCP (prestressed concrete cylinder pipe), a nodular cast iron pipe and old pipe network reconstruction.

Description

[0001] (1) Technical field: tap water pipes lined with thin-walled stainless steel pipes and their production methods, which belong to pipes (F16L) and layered products composed of thin layers (B32B). (two) background technology: [0002] The city's water supply network used to consist of cement pipes, which are prestressed reinforced concrete pipes. In recent years, it has been found that the pipe network of the cement inner wall of many cities is polluted by accumulated moss and bacteria in the sediment during the water delivery process, which deteriorates the water quality transported by the pipe network. In view of this, Europe and the United States have been studying the new process of lining thin-walled stainless steel pipes with cement pipes for many years, and using stainless steel liners to solve the pollution problem of drinking water at one time. [0003] The process of lining stainless steel in cement pipes is quite complicated, which involves multidisciplinary kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/14
Inventor 廖仲力
Owner 四川民生管业有限责任公司
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