Device for trenchless pipeline replacement

Abstract

FIELD: construction.SUBSTANCE: used for trenchless replacement of pipelines during the repair and reconstruction of underground utilities. The device consists of a pipe-destroying working element with two disc knives, pivotally connected to an expander for increasing the diameter of the well, and a cable with elements installed on it. Each element consists of a removable sleeve in the form of a Y-shaped tee. At each end of the sleeve there is a downpipe with a rod with the possibility of axial rotation. On the inner surface of the downpipe there are two radial shaped grooves located opposite each other. An axis is installed in the grooves, on which two stops and a roller between them are mounted. A compression spring is installed between the base of the downpipe and the stops. The pipe-destroying working element and the expander are made in one piece. The hinge joint is made in the form of a tube with rolled edges, in each of which a ball with a pin is installed. One of the pins is connected to the rear end of the pipe-destroying working element, and the other pin is connected to the front end of the expander. The downpipe is made integral with the rod. The stop is made in the form of a part, the longitudinal section of which is a segment with an area less than the area of the semicircle. The radius of curvature of the contact surface of the roller is equal to half its thickness .EFFECT: improving the reliability of curved pipelines.4 cl, 7 dwg

Description

[0001] The invention relates to construction production and can be used for trenchless replacement of pipelines during repair and reconstruction of underground utility lines.

[0002] A device is known for trenchless replacement of underground pipelines (RU Patent No. 2457386, IPC F16L 1 / 028, E02F 5 / 18, published 2012), containing a cylindrical pipe-destroying working element with a disk knife, two expanders for increasing the diameter of the well, a device for fastening a new plastic pipeline, pivotally connected to each other, as well as a cable with elements in the form of crosses with rollers.

[0003] Also known is a device for trenchless replacement of a pipeline, which is the closest in technical essence to the proposed technical solution (RU Patent for Invention No. 2500946, class F16L 1 / 028, E02F 5 / 18, published 2013), containing a pipe-destroying working element with disk knives, an expander for increasing the diameter of the well, a device for fastening a new plastic pipeline, pivotally connected to each other, and a cable with elements installed on it in the form of removable bushings, each of which contains three equally spaced rods and a ball.

[0004] The disadvantages of these devices are their low reliability when passing through curved sections of the pipeline.

[0005] The technical result of the invention is to increase the reliability of the device when passing through curved sections of the pipeline.

[0006] In order to achieve the technical result in a device for trenchless replacement of a pipeline, containing a pipe-destroying working element with two disk knives, pivotally connected to an expander for increasing the diameter of the well, a cable with elements installed thereon, each of which consists of a removable sleeve in the form of a Y-shaped tee, according to the invention, at each end of the sleeve a cup with a rod with the possibility of axial rotation is installed, on the inner surface of the cup two radial figured grooves are made, located opposite each other, an axis is installed in the grooves, on which two stops and a roller between them are installed, a compression spring is installed between the base of the cup and the stops, the pipe-destroying working element and the expander are made one-piece, the hinged connection is made in the form of a tube with rolled edges, in each of which a ball with a pin is installed, one of the pins is connected to the rear end of the pipe-destroying working element,The other pin is connected to the front end of the expander. The cup is integral with the rod. The stop is a component whose longitudinal cross-section is a segment with an area smaller than the area of ​​a semicircle. The radius of curvature of the roller's contact surface is equal to half its thickness. .

[0007] These differences allow us to conclude that the claimed technical solution meets the criterion of "novelty." The features that distinguish the claimed device from the prototype are not found in other technical solutions and, therefore, ensure that the claimed solution meets the criterion of "inventive step."

[0008] The essence of the invention is explained by the drawings. Fig. 1 shows the proposed device (longitudinal section); Fig. 2 - view A in Fig. 1; Fig. 3 - section B-B in Fig. 1; Fig. 4 - section B-B in Fig. 3; Fig. 5 - view G in Fig. 4; Fig. 6 - remote element D in Fig. 1; Fig. 7 - roller with axle.

[0009] The device for trenchless replacement of a pipeline comprises a pipe-destroying working element, an expander 1 for increasing the diameter of the well and a cable 2 (Fig. 1).

[0010] A removable bushing in the form of a Y-shaped tee 3 with an axial hole 4 (Fig. 1, 2) is mounted on the cable 2. At each end of the tee 3, a cup 5 with a rod 6 is mounted, with the possibility of axial rotation with the help of a rolling bearing 7 (Fig. 3, 4). The tee 3 is fixed on the cable 2 with a locking screw 8 (Fig. 2). On the inner wall of the cup 5, radial figured grooves 9, 10 (Fig. 3, 4) are made, located opposite each other. An axis 11 with stops 12, 13 and a roller 14 between them is mounted in the radial figured grooves 9, 10 (Fig. 5). Axle 11 is pressed into stop 12 at one end and into stop 13 at the other. Roller 14 is mounted on axis 11 and allows free rotation. Compression spring 16 is installed between base 15 of the cup and stops 12 and 13.

[0011] The pipe-breaking working element consists of a solid cylindrical body 17 with disk knives 18, 19 for cutting the old pipeline 20. The pipe-breaking working element is connected with the front end of the cable 2, and with the rear end of the expander 1 by means of a hinged connection consisting of a tube 21 with rolled edges, in each of which a ball 22 with a pin 23 is installed (Fig. 1). On the pin 23, a thread 24 and a surface 25 for a key (Fig. 6) are made, for example, with a square cross-section. One of the pins 23 is connected to the rear end of the pipe-breaking working element, and the other pin 26 is connected to the front end of the expander 1 by means of a threaded connection. The rear end of the expander 1 is connected to the new pipeline 27.

[0012] Glass 5 is made integral with rod 6.

[0013] Each of the stops 12, 13 is made in the form of a part, the longitudinal section of which is a segment with an area less than the area of ​​the semicircle (Fig. 5), which provides a larger contact area of ​​the compression spring 16 with the stops 12, 13 and transmits force to the roller 14, ensuring its constant contact with the surface of the pipe 20.

[0014] The radius of curvature of the contact surface of roller 14 is equal to half its thickness (Fig. 7), which increases the maneuverability of the device on curved sections of the pipeline.

[0015] The device operates as follows.

[0016] The device is placed in one of the pits and assembled.

[0017] The pipe-breaking working element and the expander 1 are connected to each other by pins 23, 26 of the articulated joint, which are screwed into their ends using open-end wrenches.

[0018] After which, a cable 2 is passed through the old pipeline 20 from another pit and connected to the pipe-destroying working tool.

[0019] Then tees 3 are installed on cable 2 at the required distance from each other and fixed to it using fixing screws 8.

[0020] Next, expander 1 is connected to the new pipeline 27.

[0021] After which the device is ready for use.

[0022] The hydraulic jack is activated. Using cable 2, it begins to statically (shocklessly) pull the pipe-breaking tool with expander 1 and new plastic pipeline 27 into the old pipeline 20. As it moves forward, the pipe-breaking tool cuts the old pipeline 20 into two parts with disc knives 18, 19, spreads it, deforms it, and presses it into the ground with expander 1, simultaneously pulling the new plastic pipeline 27 along the borehole being formed.

[0023] Compression spring 16 rests on and presses against stops 12 and 13, transmitting force to roller 14. Roller 14 presses against the walls of old pipeline 20, firmly supporting them, preventing loss of stability of tee 3, including when passing curved sections of the pipeline. In this case, cable 2 is secured in the center of the pipeline, preventing twisting, kinking, and wear.

[0024] The cups 5 with the rod 6 in the rolling bearings 7 during movement turn in the direction of the axis of the cable 2, eliminating the skidding of the rollers 14.

[0025] The pipe-destroying working element 1 with the expander 2, thanks to the hinged connection between them, bends when moving along curved sections of the pipeline, overcoming them.

[0026] The claimed device for trenchless pipeline replacement will improve the reliability of the passage of curved pipelines.

Claims

1. A device for trenchless replacement of a pipeline, comprising a pipe-destroying working element with two disk knives, pivotally connected to an expander for increasing the diameter of a well, a cable with elements installed thereon, each of which consists of a removable sleeve in the form of a Y-shaped tee, characterized in that a cup with a rod with the possibility of axial rotation is installed at each end of the sleeve, two radial figured grooves are made on the inner surface of the cup, located opposite each other, an axis is installed in the grooves, on which two stops and a roller are installed between them, a compression spring is installed between the base of the cup and the stops, the pipe-destroying working element and the expander are made in one piece, the hinged connection is made in the form of a tube with rolled edges, in each of which a ball with a pin is installed, one of the pins is connected to the rear end of the pipe-destroying working element, and the other pin is connected to the front end of the expander.

2. The device according to paragraph 1, characterized in that the glass is made integral with the rod.

3. The device according to paragraph 1, characterized in that the stop is made in the form of a part, the longitudinal section of which is a segment with an area less than the area of ​​the semicircle.

4. The device according to paragraph 1, characterized in that the radius of curvature of the contact surface of the roller is equal to half its thickness. .

Images