SU876877A1 - Apparatus for trench-free laying of pipelines by static piercing - Google Patents

Description

(54) DEVICE FOR WITHOUT SHIELDING LAYING OF PIPELINES BY THE STATIC PROCOL

I

The invention relates to devices for constructing junctions of trunk pipelines of small diameters (up to 630 mm) by static puncture.

A device for laying trubopatronov under roads, comprising a pipe-cartridge, hydraulic pressure equipment in the form of hydraulic jacks and a pumping station and an abutment wall (I.

When the cartridge pipe is pressed into the soil at its downhole end, a soil plug is formed, leading to the formation of a sealing soil cartridge tip that significantly increases the penetration resistance at the front end of the pipe:

The closest in technical essence and the achieved result to the proposed is a device for the trenchless laying of pipelines with a static puncture, including a pipe-cartridge, a tapered tip, pressure equipment and an abutment wall (2).

However, long-hole penetration by this device is extremely difficult due to the large forces of rpyHTOEioro resistance. The increase in pressure force, in addition to the complexity of the equipment and thrust wall, causes a loss of stability of the tube-cartridge. Bending in the borehole, the cartridge tube rests against the resulting knee into the borehole wall, causing additional deformation and a sharp increase in the resistance of the soil to the penetration process. A subsequent increase in the pressure force leads to a further curvature of the tube-cartridge and an increase in the ground resistance.

The purpose of the invention is to increase the efficiency of the gasket by reducing the magnitude of the pressure force.

In this case, the force is divided into separate components: the force required to overcome a separate frontal resistance of the soil, and the force required to overcome the lateral resistance of the soil to push the cartridge into the well.

This goal is achieved by the fact that the conical tip is made with the possibility of axial movement relative to the 20 pipe cartridge and is connected to it by means of a power hydraulic cylinder.

FIG. 1 shows a device generally seen in FIG. 2 - conical tip The conical tip 1 is freely mounted on the pipe-cartridge 2 and connected to it by means of a power cylinder 3, which is connected to the pump station 5, also supplying hydraulic jacks 7 that interact with the abutment wall 8 through the control panel 6. The operation of the device in the production of a puncture is as follows. The conical tip 1, pushing away from the tube of the cartridge 2 by the power cylinder 3, is inserted into the ground for the stroke of the hydraulic cylinder shaft 3. At the same time, the possible elastic bending of the tube-cartridge 2 under the action of reactive force; is useful because it contributes to the wedging of the cartridge pipe in the well and thus prevents the transfer of reactive force to the pressure equipment and the abutment wall 5. After the conical tip I extends, the hydraulic jacks 7 start to work. - cartridge 2 into the well by an amount equal to the course of the conical tip 1, which thus is again moved up to the pipe cartridge 2. Then the cycle is repeated several times until the cone tip leaves the receiving boiler van (not shown). Thus, in the proposed device, the required pressure force is divided into two component forces, which are applied alternately, separately to the conical tip 1, when used as an emphasis on the pipe cartridge 2, and separately to the pipe cartridge 2, when used as thrust wall 8. The technical and economic effect of the use of the proposed device is the sum of the ability to apply a lightweight design of the thrust wall and pressure equipment (cost reduction, metal consumption and labor intensity installation and disassembly during puncture) and the ability to produce longer forms1 / lz of the invention. A device for trenchless laying of pipelines with a static puncture, including a tube-cartridge, a tapered tip, pressure equipment and an abutment wall, characterized in reducing the magnitude of the pressure force, the conical tip is made with the possibility of axial movement relative to the pipe-cartridge and is connected to it by means of a power hydraulic cylinder. Sources of information taken into account in the examination 1. V. Minayev. ManjHUbi for the construction of trunk pipelines. M., "Nedra, 1973, p. 237-239 2. The same, p. 222-223 (prototype).

Claims (1)

Claim A device for trenchless laying of pipelines with a static puncture, including a chuck pipe, cone tip, pressure equipment and a stop wall, characterized in that, in order to increase the efficiency of the laying by reducing the pressure force, the cone tip is made with the possibility of axial movement relative to the chuck pipe and connected to it by means of a power hydraulic cylinder.