CN201526741U

CN201526741U - Prestressed steel cylinder pipe with inner and outer double protecting layers

Info

Publication number: CN201526741U
Application number: CN200920221866XU
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: 2009-11-03
Filing date: 2009-11-03
Publication date: 2010-07-14
Anticipated expiration: 2019-11-03

Abstract

The utility model relates to a prestressed steel cylinder pipe with inner and outer double protecting layers. A steel pipe socket and a steel pipe spigot are respectively, coaxially and fixedly installed at two ends of a steel cylinder pipe, two cement mortar protecting layers are respectively fixedly mounted on the outer wall of the steel cylinder pipe and the outer wall of the steel pipe socket, steel fiber concrete protecting layers are fixedly installed on the inner wall of the steel cylinder pipe and the inner wall of the steel pipe spigot, prestressed steel wires are wound on the outer wall of the steel cylinder pipe and the steel pipe socket inside the cement mortar protecting layers, and the thickness of the steel cylinder pipe ranges from 2 mm to 50 mm. The prestressed steel cylinder pipe with simple overall structure and scientific and reasonable design can save dies for molding tube cores during a molding process, effectively save production cost, reduce process steps in the molding process of the tube cores, increase production efficiency, is relatively light in weight and can effectively reduce cost of transportation, hoisting and construction.

Description

Prestress steel bobbin with inside and outside two protective layers

Technical field

The utility model relates to the steel pipe field, especially a kind of prestress steel bobbin with inside and outside two protective layers.

Background technique

Widely used steel faucet prestressed concrete pipe in large-scale liquid conveying engineering, owing to be inlaid with a steel cylinder and this steel cylinder two ends are coaxial respectively directly is packed on steel bellmouth and the socket at this concrete pipe in-core, thereby make whole concrete pipe self form an airtight integral body, therefore efficiently solve because of carrying fluid pressure to cause the problem of carrying liquid to exosmose by concrete tube wall.There is following problem in existing steel faucet prestressed concrete pipe in manufacture process: 1. concrete tube core wall is thicker, and the tubing overall weight is bigger, has increased the cost of transportation, lifting and construction greatly; 2. the moulding of concrete pipe in-core wall is easy to generate microscopic crack, causes suffering local failure in carrying the liquid process; 3. when bellmouth docked with socket in installation process, in case depart to some extent, the concrete of bellmouth and spigot came off easily, it is higher that the progress 4. that influence is installed is used for the pipe die cost of moulding concrete tube core, especially the external mold in the pipe die, its weight accounts for 1/3 of a whole set of pipe die, and cost of production is higher; 5. in the moulding process of whole steel faucet prestressed concrete pipe, concrete tube core molding time is longer, and the tube core moulding needs external mold, internal mold, bed die and backform to cooperatively interact, and lifting each pipe die all needs the long time, and manufacturing efficiency is lower.

Summary of the invention

The purpose of this utility model is to provide a kind of prestress steel bobbin with inside and outside two protective layers; This pipe overall structure is simple, design science is reasonable, can in forming process, save the external mold in the tube core shaping die, saved cost of production, reduced the process step of tube core moulding, improved manufacturing efficiency, and the tube core wall is thinner, weight is lighter, effectively reduces the cost of transportation, lifting and construction.

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

A kind of prestress steel bobbin with inside and outside two protective layers; a coaxial respectively steel pipe bellmouth and the steel pipe socket of being fixed with wherein at the two ends of steel cylinder pipe; all be fixed with a cement mortar protective course at steel cylinder pipe outer wall and steel pipe bellmouth outer wall; on steel cylinder inner tube wall and steel pipe socket inwall, all be fixed with the Steel Fiber Reinforced Concrete protective layer; all be wound with reinforcement wire on steel cylinder pipe outer wall in cement mortar protective course and the steel pipe bellmouth outer wall, the steel cylinder tube thickness is 2～50mm.

And the pitch that described reinforcement wire twines is that t is 2～50mm.

Advantage of the present utility model and beneficial effect are:

1. the prestress steel bobbin that originally has inside and outside two protective layers has saved the concrete tube core, has reduced the process step of tube core moulding, and has not re-used mould, has reduced production cost, has improved manufacturing efficiency.

2. the prestress steel bobbin of two protective layers has been done scientific and effective analysis to the thickness of steel cylinder tube body and has been drawn its more thickness t of science inside and outside originally having; the span of this t is 2～50mm; can adjust according to different operating modes, make the integral body of tubing reach the better state of resisting external pressure load and internal water pressure.

3. the inner wall protection layer that originally has the prestress steel bobbin of inside and outside two protective layers adopts Steel Fiber Reinforced Concrete, has reduced the microscopic crack rate of inner tube wall, has strengthened the intensity of joint socket, under equal working condition, has reduced the thickness and the weight of whole tube wall.

4. the utility model overall structure is simple, and design science is reasonable, can save the tube core mold for forming in forming process, save cost of production, reduced the process step of tube core moulding, improved manufacturing efficiency, and weight is lighter, effectively reduces the cost of transportation, lifting and construction.

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 bobbin with inside and outside two protective layers; a coaxial respectively steel pipe bellmouth 6 and the steel pipe socket 1 of being fixed with wherein at the two ends of steel cylinder pipe 3; steel pipe socket outer wall directly upwards is shaped on groove; the quantity of this groove can be 1～3; the quantity of present embodiment steel pipe socket shown in the drawings groove is 2; this groove is set with O-ring seal in the process of tubing construction and installation; to reach the effect of sealed steel pipe bellmouth and steel pipe socket; all be fixed with a cement mortar protective course 5 at steel cylinder pipe outer wall and steel pipe bellmouth outer wall; on steel cylinder inner tube wall and steel pipe socket inwall, all be fixed with Steel Fiber Reinforced Concrete protective layer 2; all be wound with reinforcement wire 4 on steel cylinder pipe outer wall in cement mortar protective course and the steel pipe bellmouth outer wall; the pitch that reinforcement wire twines is that t is 2～50mm; this pitch can be carried out the selected of span according to different operating modes; present embodiment pitch shown in the drawings is 5mm; the steel cylinder tube thickness is 2～50mm, and the thickness t of present embodiment steel cylinder pipe shown in the drawings is 18mm.

Preparation process of the present utility model is similar to the preparation process of PCCP, just saved the assembling of external mold in the concrete pipe core molding process, can in time produce at original production line, not only improved the efficient of producing, and original resource also obtain better performance.

The utility model is compared the weight that has alleviated tubing greatly with common PCCP pipe under same operating conditions.Tubing with DN3000mm is that example is specifically narrated below:

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

The steel plate thickness that common PCCP tubing is used is 1.5mm, and tube wall thickness is 215mm, and every linear meter(lin.m.) tubing weight is 5.44 tons;

Steel cylinder tube thickness of the present utility model adopts 4mm, and tube wall thickness is 63mm, and every linear meter(lin.m.) tubing weight is 2.5 tons, and weight reduces amplitude up to 54%.

Claims

1. prestress steel bobbin with inside and outside two protective layers; it is characterized in that: a coaxial respectively steel pipe bellmouth and the steel pipe socket of being fixed with at the two ends of steel cylinder pipe; all be fixed with a cement mortar protective course at steel cylinder pipe outer wall and steel pipe bellmouth outer wall; on steel cylinder inner tube wall and steel pipe socket inwall, all be fixed with the Steel Fiber Reinforced Concrete protective layer; all be wound with reinforcement wire on steel cylinder pipe outer wall in cement mortar protective course and the steel pipe bellmouth outer wall, the steel cylinder tube thickness is 2～50mm.

2. the prestress steel bobbin with inside and outside two protective layers according to claim 1 is characterized in that: the pitch that described reinforcement wire twines is that t is 2～50mm.