CN2490746Y

CN2490746Y - Light high-strength abnormal-shaped underground conduit

Info

Publication number: CN2490746Y
Application number: CN 01244403
Authority: CN
Inventors: 徐三男
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-19
Filing date: 2001-06-19
Publication date: 2002-05-08
Anticipated expiration: 2011-06-19

Abstract

A light high-strength abnormal-shaped underground conduit having an internal wall and an external wall to form a conduit body in length direction is characterized in that: the internal wall and the external wall are both formed by threads of the similar or same shape according to fixed lead winding spiralization, wherein the threaded winding lines of the internal wall and the external wall share the same initial point. The utility model are made of PE high-pressure polyethylene and are formed through one-shot continuous extrusion from a die with the geometrical characteristic that the internal wall and the external wall of the conduit body both have a corrugated physical form. The utility model which has the advantages of light mass, high strength, small friction coefficient and few interfaces is a new-generation underground conduit product as a substitute of prior composite pipes, glass reinforced plastic pipes, concrete pipes, steel pipes and PVC pipes.

Description

The underground thread-protected tube of a kind of Light high-strength abnormal-shaped

The utility model relates to electric power and communication line wire bushing pipes such as a kind of underground cable, optical cable, is specifically related to the special-shaped underground thread-protected tube of a kind of high-strength light CERP.

Thread-protected tube is as the outer layer protection structure of electric power such as underground cable, optical cable and communication line, and features such as its performance, intensity, shape not only directly influence laying project, but also directly influence the protection quality and the effect of circuit.In the prior art, underground telecommunications, power cable are laid, and the underground electric wire of highway, urban street, work area, street lamp is buried underground and all adopted multiple tube, glass reinforced plastic pipe, pipe of cement, steel pipe or pvc pipe.Above-mentioned various types of underground cable, optical cable thread-protected tube are divided into two kinds from the geometric form angle: a kind of is that inner and outer wall is straight tubular, as multiple tube, glass reinforced plastic pipe, pipe of cement and steel pipe; Another kind is that inwall is straight tubular, and outer wall is corrugated, as pvc pipe.Although above-mentioned various types of thread-protected tube is relatively simple for structure, in actual the use all in various degree have a following defective: 1, single thread-protected tube length is shorter, and interface is many; 2, because the body flexibility is little, inconvenience is laid in construction when meeting obstacle; 3, because inboard wall of tube body is straight tubular, it is big to wear in the cable process frictional force, often needs more workmen dilatory; 4, because body is straight tubular, bearing strength can only guarantee by materials such as iron and steel, cement, makes body become heavy, makes troubles to construction.

The utility model purpose provides a kind of inner and outer wall and all becomes the underground thread-protected tube corrugated geometric properties, high-strength light.

For achieving the above object, the technical solution adopted in the utility model is: the underground thread-protected tube of a kind of Light high-strength abnormal-shaped, constitute body in the longitudinal direction by inner and outer wall, by deciding helical pitch around the axis spiralization, wherein the screw thread of inner and outer wall is around the starting point unanimity of axis by similar or identical shaped screw thread for inner and outer wall.

In the technique scheme, described " similar or identical shaped screw thread " is meant that the shape of the screw thread of inner and outer wall can be similar shape, also can be for identical shaped, but outer wall around the radius of axis spiral rotation greater than inwall, its absolute value that differs is the wall thickness of body.Described " helical pitch " distance for pivoting and on axis direction, advancing in a week.Described " screw thread of inner and outer wall is around the starting point unanimity of axis " its connotation be the screw thread of inner and outer wall at same cross section, from same circumference angle beginning screw, obtain the uniform body of wall thickness with this.

In the technique scheme, described screw thread can be following several situation:

1, screw thread is the waveform curve, as constituting waveform curve (this scheme the best) by sinusoidal rule by two half-round curve, also can adopt two sections curves to constitute the waveform curve, can also adopt one section curve and one section straight line or broken line to form waveform by sinusoidal rule.

2, screw thread is a rectangle.

3, screw thread is trapezoidal.

4, screw thread is a zigzag.

5, screw thread is a triangle.

The utility model adopts the PE polyethylene from high pressure process by the disposable continuous extrusion of mould, and geometric properties is that the inner and outer wall of body all becomes the moulding of corrugated physics.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1, because the utility model integral body is the moulding of corrugated physics, can free bend, flexibility is good, therefore cut-through thing easily in the construction.

2, because being pressed by similar or identical shaped screw thread, the utility model decides helical pitch around the axis spiralization, actual production can be passed through the disposable continuous extrusion of mould, therefore can produce thread-protected tube length according to customer requirements, unit length is unrestricted, compared with prior art unit length is long, interface is few, saving of work and time during laying.

3, the utility model interface adopts joint sleeve of the same type to dock not only simply by screw thread but also is easy.

4, because the utility model inwall is a wave structure, coefficient of friction is few when adopting dilatory cable of lead-in wire or optical cable, establishes the lead-in wire iron wire in once can introduce quite long line-spacing.

5, because the utility model adopts PE polyethylene from high pressure process material, no matter drench with rain outdoor sunshine or imbed in any soil property, all can reach more than 100 years useful life.

6, because the utility model is more light than pipe of cement and steel pipe weight, therefore carrying is easy, easy construction.

7, because the utility model integral body is the moulding of corrugated physics, therefore have the intensity height, crushing resistance is good, is subjected to heavy burden indeformable.

8, because the utility model flexibility is good, and compression strength is big, even ground fracture or sinking are also very safe.

9, because the utility model advantage is outstanding, the efficiency of construction height, the duration is short, and interface is few, and therefore to compare pipeline quality good with existing thread-protected tube, and cost is low.

Accompanying drawing 1 is the utility model embodiment cutaway view;

Accompanying drawing 2 is the left view of the utility model Fig. 1;

Accompanying drawing 3 is the utility model docking structure cutaway view in use.

Wherein: [1], body; [2], inwall; [3], outer wall [4], joint sleeve.

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, the underground thread-protected tube of a kind of Light high-strength abnormal-shaped, constitute body [1] in the longitudinal direction by inwall [2] and outer wall [3], inwall [2] and outer wall [3] are pressed by the waveform screw thread and are decided helical pitch around the axis spiralization, wherein inwall [2] is consistent around the starting point of axis with the screw thread of outer wall [3], obtains the uniform body of wall thickness [1] with this.Present embodiment adopts the PE polyethylene from high pressure process by the disposable continuous extrusion of mould.

Present embodiment can produce the underground thread-protected tube of various different-diameter specifications according to actual needs.During construction, at first will selection and the underground thread-protected tube of cable or the suitable size of cable outer diameter, excavate 0.6 meter dark trench (the pressurized place answers buried 1.2 meters) again, then thread-protected tube is laid in the trench, the joint adopts joint sleeve [4] to dock, when laying the multichannel pipeline, must use the locating rack location, keep certain distance each other.Tamp with original soil in the no abnormal back of conduction test at last.

Claims

1, the underground thread-protected tube of a kind of Light high-strength abnormal-shaped, constitute body in the longitudinal direction by inner and outer wall, it is characterized in that: by deciding helical pitch around the axis spiralization, wherein the screw thread of inner and outer wall is around the starting point unanimity of axis by similar or identical shaped screw thread for inner and outer wall.

2, thread-protected tube according to claim 1 is characterized in that: described screw thread is the waveform curve.

3, thread-protected tube according to claim 1 is characterized in that: described screw thread is a rectangle.

4, thread-protected tube according to claim 1 is characterized in that: described screw thread is trapezoidal.

5, thread-protected tube according to claim 1 is characterized in that: described screw thread is a zigzag.

6, thread-protected tube according to claim 1 is characterized in that: described screw thread is a triangle.