RU2477772C2 - Device for trenchless laying of pipelines by piercing method - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device for trenchless laying of pipelines by piercing comprises a working tip of conical shape, a vibrator of circular oscillations of which is arranged in the form of an electric motor with a hollow shaft, the stator of which is fixed in the working tip, and the rod is installed inside the hollow shaft, having a displaced centre of gravity relative to the axis of rotation, at the same time the rod is fixed on the flange, which is mounted on the front end of the laid pipeline along the piercing direction. The rotation device is arranged in the form of a cover with a hole, rolling in displaced surfaces of the rotating eccentric reciprocally moving along the longitudinal axis of the rod.

EFFECT: higher accuracy of pipeline laying.

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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 containing a hollow conical working tip connected through a hinge and a rotation support to a rod mounted on a flange mounted on the front end of the pipe being laid in the direction of the puncture, a circular vibrator mounted inside hollow working tip; 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 rod is installed inside the hollow shaft having a displaced center of gravity relative to the axis of rotation, while the rod is fixedly mounted on the flange, and the feeding mechanism [2].

A disadvantage of the known device is the inability to change the direction of the puncture during trenchless laying of pipelines.

The objective of the invention is to improve the accuracy of piping.

To achieve the task, a rod is fixedly mounted on the flange, along which, rotating, an eccentric, consisting of two displaced cylindrical surfaces with a smooth transition between them, is translationally moving.

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 getting inside the working tip 5. A drive 13 is mounted on the flange 2, which is connected via a mechanical transmission 14 to an eccentric 15, which, rotating, moves along the thread along the rod 3. Cover 16 with a hole is run on the outer surface of the cam 15 when the electric motor-vibrator 6 is operating.

The feed mechanism consists of a guide frame 20 with horizontal 18 and vertical 19 guide rollers, movable 21 and fixed 22 traverses, rope 23 and traction winch 24. The electric motor - vibrator 6 is fed through a fixed cable 10 passing inside the shaft 3, the brush unit 9, fixed on the rod 3 and the movable cable 11. The drive 13 of the rotation mechanism is powered by a cable 17.

To carry out the puncture, the traction winch 24 and the electric motor-vibrator 6 are turned on, inside of which the rotor-unbalance 7 begins to rotate in the bearing units. The disturbing force arising from 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 corresponding 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 oscillation amplitude is equal to 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 rotation of the eccentric 15 under the control of the control system is carried out by the actuator 13 with the self-braking function through a mechanical gear 14, which ensures axial movement of the eccentric with an internal thread on the external threaded part of the rod 3. The outer surface of the eccentric 15 consists of three main surfaces of the required length contacting when changing its position with the opening of the cover 16, while the cylindrical surface A provides a zero angle of rotation of the tip relative to the ball bearings 4; surface B corresponds to the maximum angle of rotation relative to the axis of the laid pipeline 1 (see figure 3); surface B provides a smooth transition from surface A to B with intermediate values of the angle of rotation. The length of the surface B is selected so that during rotation and axial movement of the eccentric 15 provides the necessary angle of rotation of the vibrating tip in the vertical and horizontal planes with the possibility of intermediate positions.

The use of the device will allow not only to increase the accuracy of trenchless laying of pipelines by the puncture method, but also taking into account a significant reduction in the puncture force due to the design of the vibro-tip, it allows trenchless laying of pipelines by a puncture method with a given curved direction.

Information sources

1. Patent 2190728. Russian Federation, IPC E02F 5/18. Device for trenchless laying of pipelines by 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. No. 28.

2. Patent 2373337. Russian Federation, IPC E02F 5/18. Device for trenchless laying of pipelines by puncture method. Krasnoludsky A.V., Krasnoludsky N.V .; applicant and patent holder of SSTU (RU); declared 03/23/08; publ. 11/20/09, Bull. Number 32.

Claims (1)

A device for trenchless laying of pipelines by a puncture method, containing a hollow conical working tip, the circular vibrator of which 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 rod is installed inside a hollow shaft having an offset center of gravity relative to the axis of rotation, this rod is fixedly mounted on the flange, which is mounted on the front in the direction of puncture the end of the laid pipeline, characterized in that the device the gate is designed as a cap with a hole, roll on the rotating surfaces and displaced translationally moving along the longitudinal axis of the eccentric shaft.

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