RU2373337C1 - Device for trenchless installation of pipelines by method of puncture - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention is related to the field of construction, namely to devices intended for trenchless installation of pipelines by method of puncture, and may find application for arrangement of hidden passages in construction of pipelines, underground communication cables and power transmission lines. Device for trenchless installation of pipelines by method of puncture comprises hollow working tip of conical shape, which connected via hinged joint and rotation support with rod fixed on flange mounted on the front end of installed pipeline according to puncture direction, vibrator of circular oscillations installed inside hollow working tip. Vibrator of circular oscillations is made in the form of electric motor with hollow shaft, stator of which is fixed in working tip, and rod is installed inside hollow shaft having displaced centre of gravity relative to axis of rotation. At the same time rod is fixed on flange.

EFFECT: improved reliability and efficiency of device operation.

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Description

The invention relates to construction, and in particular to devices intended for trenchless laying of pipelines by a puncture method, and may find application for concealed transitions in the construction of pipelines, underground cable communication lines and power lines.

A device is known for trenchless laying of pipelines by a puncture method, comprising a conical hollow working tip connected through a hinge and a rotation support to a rod fixed in rotation supports on a flange mounted on the front end of the pipe being laid in the direction of the puncture, a vibrator drive installed in the pipe being laid and connected to the rod, a circular vibrator made in the form of a roller resting on the inner surface of the hollow working tip, the shaft connecting the axis of the roller with the rod, and the feeding mechanism [1].

The closest to the expected technical essence and the achieved result is a device for trenchless laying of pipelines by a puncture method containing a hollow conical working tip connected through a hinge and a rotation support to a rod fixed in rotation supports on a flange mounted on the front end in the direction of the puncture the laid pipeline, the vibrator drive installed in the laid pipeline and connected to the rod, the circular vibrator made in the form of an imbalance having the form of a sector of a hollow cylinder mounted inside a hollow working tip on rotation bearings, a carrier connecting the unbalance to the rod and the feeding mechanism.

The most loaded element of the known device is a rotation support connecting the rotating rod with a conical working tip. The high speed of rotation of the rod and a significant load on the working tip leads to a quick failure of the rotation support. Increasing the reliability of the support by increasing its size leads to a shift in the center of oscillation of the working tip from the top of the cone, resulting in a decrease in the efficiency of the device - increases the energy consumption and puncture force.

The purpose of the invention is to increase the reliability and efficiency of the device. To achieve this goal, the rod is fixedly mounted on the flange, and a circular vibration motor with a hollow shaft is placed inside the hollow tip.

Figure 1 presents a device for trenchless laying of pipelines by a puncture method, General view; figure 2 is the same, a top view; figure 3 is a section of the head of the device.

A device for trenchless laying of a pipeline by a puncture method comprises a laid pipe 1, on the front end in the direction of the puncture of which a flange 2 is fixedly mounted, on which the rod 3 is fixedly mounted. On the rod 3 is mounted a ball bearing 4, on which a hollow conical working tip 5 is supported. Inside a hollow working tip 5 is installed an electric motor-vibrator of circular oscillations 6, the stator of which is fixed in the tip. In the bearing assemblies of the electric motor-vibrator 6, the rotor 7 rotates, which is a hollow shaft with a through hole 8 and a shifted center of gravity relative to its axis of rotation and performing the function of unbalance. The through hole 8 serves to accommodate the rod 3. The seal 12 prevents soil from entering the working tip 5.

The feed mechanism consists of a guide frame 13 with horizontal 14 and vertical 15 guide rollers, movable 16 and fixed 17 traverses, rope 18 and traction winch 19. The electric motor-vibrator 6 is supplied through a fixed cable 10, a brush unit 9, fixed to the rod 3, and movable cable 11.

To carry out the puncture, the traction winch 19 and the electric motor-vibrator 6 are turned on, inside of which the rotor-unbalance 7 starts to rotate in the bearing units. The disturbing force arising during the rotation of the rotor-unbalance is transmitted to the working tip 5 through the rotation bearings, which, together with the unbalance, makes circular oscillations with a frequency equal to the rotational speed of the rotor-unbalance 7, perpendicular to the direction of penetration. The center of oscillation of the working tip 5, i.e. the point at which the amplitude of the oscillations is zero coincides with the ball bearing 4. With distance from it, the amplitude increases and reaches a maximum on its cylindrical part. The working tip 5, rolling around the surface of the well, causes oscillations of the soil in the radial direction, which helps to reduce the friction and adhesion forces in it and, as a result, reduce the resistance and increase the speed of laying the pipeline 1.

The fixed mounting of the rod on the flange and the execution of the vibrator in the form of an electric motor-vibrator inside the tip, not connected with the rod, allows you to remove the rotation support from the device design as an unnecessary drive element, which increases the reliability of the proposed device. The sliding speed of the mating surfaces in comparison with the prototype is not significant and is associated only with circular vibrations of the working tip relative to the ball bearing under the influence of the disturbing unbalance force. The absence of a rotation support when the rod is stationary will make it possible to bring the center of oscillation of the working tip closer to the top of the cone, as a result of which the efficiency of the device increases.

Information sources

1. Patent 2190728 Russian Federation, IPC E02F 5/18. A device for trenchless laying of pipelines by a puncture method. Romakin N.E., Romakin D.N., Zemskov V.M .; applicant and patent holder Institute of Technology, Technology and Management of SSTU (RU); declared 03/05/01; publ. 10/10/02, Bull. Number 28.

2. Patent 2249083 Russian Federation, IPC E02F 5/18 F16L 1/028. A device for trenchless laying of pipelines by a puncture method. Romakin N.E., Romakin D.N., Krasnoludsky N.V .; applicant and patent holder of SSTU (RU); declared 12/05/02; publ. 03/27/05, Bull. Number 9.

Claims (1)

A device for trenchless laying of pipelines by a puncture method, comprising a conical hollow working tip connected through a hinge and a rotation support to a rod mounted on a flange that is mounted on the front end of the pipe being laid in the direction of the puncture, a circular vibrator installed inside the hollow working tip, characterized the fact that the circular vibrator is made in the form of an electric motor with a hollow shaft, the stator of which is fixed in the working tip, and the shaft of the mouth copulating within the hollow shaft having an offset center of gravity relative to the rotational axis, wherein the shaft is fixedly mounted on the flange.

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