CN201166198Y

CN201166198Y - Prestress steel jacking tube

Info

Publication number: CN201166198Y
Application number: CNU200820073761XU
Authority: CN
Inventors: 赵斌; 张亮
Original assignee: Tianjin Waterline Pipeline Engineering Co Ltd
Current assignee: Tianjin Waterline Pipeline Engineering Co Ltd
Priority date: 2008-01-28
Filing date: 2008-01-28
Publication date: 2008-12-17
Anticipated expiration: 2018-01-28

Abstract

The utility model relates to a prestressed steel jacking pipe, which is composed of a pipe body, a protection layer of the outer wall of the pipe body and an inside lining layer of the inner wall of the pipe body, wherein a prestressed steel wire is wound on the outer wall of the pipe body in the protection layer. The prestressed steel jacking pipe has simple structure, scientific and reasonable design, thinner pipe wall, less steel consumption and lower cost, and is the prestressed steel jacking pipe which has long service life and higher antiseptic property.

Description

Prestress steel jacking pipe

Technical field

The utility model relates to steel jacking pipe, especially a kind of prestress steel jacking pipe.

Background technique

Steel jacking pipe generally be applied in geographical environment do not allow to slot operation, construction environment require noise less traffic is not exerted an influence or the situation of the easy sedimentation in ground under.The steel jacking pipe that is used for the discharge pressure fluid at present mainly adopts the steel plate of L175-L555 level (tensile strength is 175-555MPa) welding to make, because the yield strength of these common irons is lower, so when making the high steel jacking pipe of compressive strength, the tube wall design of steel jacking pipe is very thick.Pipeline with DN1800 is an example, operating conditions is: working pressure 0.6MPa, thickness of earth-fill cover 2m, the required steel plate thickness of plain carbon steel jacking pipe is at least 14mm, every linear meter(lin.m.) pipe line steel material use quantity is 695Kg, though steel jacking tube wall thickness increases the purpose that can satisfy the discharge pressure fluid, but there are the following problems: 1. steel jacking tube wall thickening, the steel using amount that causes producing every steel jacking pipe strengthens, and the cost of raw material raises; 2. steel jacking tube wall thickening causes steel jacking pipe weight to strengthen, and the difficulty of transportation and construction strengthens; 3. steel jacking at present guarantees that sheath is generally steel pipe coated inner wall corrosion resistant, high-abrasive material, its outer wall is provided with thermal insulation layer and protective layer, thermal insulation layer generally adopts polyurethane foaming or silicate and other thermal insulating material, protective layer generally adopts materials such as plastic tube or glass fibre reinforced plastics, its antiseptic property is relatively poor, directly cause steel jacking pipe shorter working life, improved the cost of changing; Steel belong to highly energy-consuming, maximum discharge product in addition, and the increasing of use amount can cause the consumption of a large amount of consumption, the especially non-renewable resources of the energy, and do not meet the environmental protection policy of the energy-saving and emission-reduction that country advocates.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of simple in structure, and design science is reasonable, and tube wall is thinner, and steel using amount is less, and cost is lower, long service life and have the prestress steel jacking pipe of higher antiseptic property.

The utility model solves its technical problem and is achieved through the following technical solutions:

A kind of prestress steel jacking pipe is made of the protective layer of body, tube wall, the inside liner of inboard wall of tube body, wherein is wound with reinforcement wire on the tube wall in protective layer.

And the reinforcement wire that twines on the tube wall in the described protective layer is the 1-3 layer.

And described protective layer is glass fibre reinforced plastics or polyurethane, and described inside liner is polyurethane or glass fibre reinforced plastics.

Advantage of the present utility model and beneficial effect are:

1. this prestress steel jacking pipe is made of the protective layer of body and inside liner and tube wall; wherein the tube wall of this in protective layer is wound with reinforcement wire; under same operating conditions; the tube wall of this steel jacking pipe is thinner; be about 2/5 of plain carbon steel jacking tube steel amount,, saved the cost of raw material greatly in iron and steel price growing today; improved economic benefit, and the use amount that reduces highly energy-consuming, maximum discharge product meets the environmental protection policy of the energy-saving and emission-reduction that country advocates.

2. this prestress steel jacking pipe outer wall is wound with reinforcement wire, strengthen whole tubing greatly and resisted the ability of external pressure earthing and internal water pressure, under equal external pressure earthing and internal water pressure situation, make the wall thickness attenuation of overall die, alleviate the weight of whole tubing, reduce prestress steel jacking pipe integral construction cost and difficulty of construction.

This prestress steel jacking pipe body two ends of extending protective layer except can adopt be welded to connect, can also coaxially respectively install steel bell and spigot or flange, constructing operation is easy; Because this tube material and tube wall is thinner, the body own wt is lighter, has also improved the ability of opposing uneven settlement to a certain extent.

4. the inside liner of this prestress steel jacking pipe, outer wall protective layer are respectively one of them of glass fibre reinforced plastics protective layer and/or polyurethane protective layer; improved the whole antiseptic property of this tubing; prolonged the working life of steel jacking pipe; and can effectively reduce the inner-walls of duct resistance, reduce whole running cost.

5. the utility model is simple in structure, and design science is reasonable, and tube wall is thinner, and steel using amount is less, and cost is lower, long service life and have the prestress steel jacking pipe of higher antiseptic property.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A-A of Fig. 1 is to the cross section enlarged view;

Fig. 3 is that the B-B of Fig. 1 is to the cross section enlarged view.

Embodiment

The utility model is described in further detail below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.

A kind of prestress steel jacking pipe, its body 2 is the steel body, at the coaxial inside liner 1 that is fixed with of the inwall of body, this inside liner adopts glass fibre reinforced plastics or polyurethane material to make; At the coaxial protective layer 4 that is fixed with of the outer wall of body, this protective layer adopts polyurethane or glass fibre reinforced plastics.Generally speaking, the material that inside liner and protective layer adopted is different, adopts glass fibre reinforced plastics as inside liner, and protective layer adopts polyurethane.Be wound with reinforcement wire 3 on this tube wall in protective layer, the reinforcement wire that is twined is the 1-3 layer, and the present embodiment accompanying drawing is depicted as one deck.

In the present embodiment, be the extension part 5 of body at the body two ends of extending protective layer and inside liner, this extension part is used for coaxial steel bell and spigot or the flange of installing to realize the connection between the tubing.

The utility model is compared saving rolled steel dosage 43.2% with plain carbon steel jacking pipe under same operating conditions.Steel jacking pipe with DN1800mm is that example is specifically narrated below:

Operating conditions is: working pressure 0.6MPa, thickness of earth-fill cover 2m;

The required steel plate thickness of plain carbon steel jacking pipe is 14mm at least, and every linear meter(lin.m.) pipe line steel material use quantity is 695Kg;

The steel plate thickness of prestress steel jacking pipe is 6mm at the most, and it is 1570MPa φ 5 steel wires that steel wire adopts tensile strength, is that 10mm is wrapped in steel jacking pipe outer wall with pitch, twines one deck, and rolled steel dosage is: steel plate 297Kg, steel wire 98Kg amounts to 395Kg.

Claims

1. a prestress steel jacking pipe is made of the protective layer of body, tube wall, the inside liner of inboard wall of tube body, it is characterized in that: be wound with reinforcement wire on the tube wall in protective layer.

2. prestress steel jacking pipe according to claim 1 is characterized in that: the reinforcement wire that twines on the tube wall in the described protective layer is the 1-3 layer.

3. prestress steel jacking pipe according to claim 1 is characterized in that: described protective layer is glass fibre reinforced plastics or polyurethane, and described inside liner is polyurethane or glass fibre reinforced plastics.