Device for trenchless replacement of underground pipelines

FIELD: construction engineering.

SUBSTANCE: invention can be used for trenchless replacement of underground pipelines of different application. Proposed device has pipe breaker with knife, pulling member, detachable well expander to force fragments of broken pipe into surrounding soil and pull new pipe into well. Detachable guide is installed additionally before pipe breaker being connected with breaker and made in form of elastic lobes with ends curved inwards. Pipe breaker is provided with radial slot in which detachable knife is installed. Expander is made in form of truncated cone whose smaller base in contact with base of pipe breaker is installed coaxially with pipe breaker being equal in diameter to pipe breaker. Larger base of conical expander is displaced radially to side of knife through value of eccentricity equal to half difference of diameters of expander bases.

EFFECT: improved operation reliability of device.

6 dwg

 

The invention relates to the construction of production and can be used for trenchless replacement of underground pipelines for various purposes.

A device for the trenchless replacement of underground pipelines (RF patent No. 2003918, CL 7 F 16 L 55/18, 7 F 16 L 1/028, 1993), containing the percussion mechanism, a device for mounting a traction element and a device for breaking the replaced pipeline with subsequent trebovaniyam its fragments in the soil.

The disadvantages of this device include a high probability of crumbling walls of the well, due to the impact of the principle of his actions, and large energy consumption of crushing the old pipeline.

Know which is the technical entity closest to the proposed technical solution the device for the trenchless replacement of underground pipelines (RF patent No. 2115053, CL 7 F 16 L 1/028, 1998), which contains pulled through the old pipe percussion mechanism, the tension wire (traction control), conical Taborstrasse body with at least one stationary knife and the extender to increase the diameter of the hole, indentation of the broken pipe into the surrounding soil and pulling casing or new pipe. The device is sent to the tensioning cable. Extender and Taborstrasse body freely set relative kick the CSOs mechanism with the possibility of direct perception of shock.

The disadvantages of this device are high probability of crumbling walls of the borehole due to the impact of the principle of his actions, the inability to change knife in case of its damage or break and the large effort required for the destruction of the pipeline due to the creation of tensile stresses not only from the side of a knife, but with the opposite knife nerazrehsimoj part of the pipeline. In addition, in the process, the possible misalignment and jamming of the device, which also leads to the necessity of creating a great effort on his movement and the destruction of the old pipeline.

The task of the invention is to improve the operational reliability of the device (decrease in the crumbling walls of the well; the possibility of quick change knife in case of malfunction or break) and reducing the effort required for movement of the device and the destruction of the old pipeline.

The problem is solved in that the device for the trenchless replacement of underground pipelines containing Taborstrasse body with a knife, the traction element and the extender to increase the diameter of the hole, indentation of the broken pipe into the surrounding soil and pulling in the new pipe, according to the invention, before drubertragen body installed United with him removable guiding device, the implementation is built in the form of elastic blades with concave inward ends, in Taborstrasse the body radially located groove in which a knife can be replaced, and the extender to increase the diameter of the hole is made removable in the form of a truncated cone, the smaller of the grounds which, in contact with the base trubarevo body, is located coaxially with him and equal to him in diameter, and a larger base is shifted in the radial direction towards the knife on the value of eccentricity equal to polprasert diameters of the base of the extender.

The advantage of the proposed device is that an uneven load on the device, caused by his skewed and asymmetric location of the knife, eliminated by the presence of the sending device. It centers the device in the old pipeline, excluding its misalignment, which, in turn, reduces the effort required for the destruction of the old pipeline.

Reducing the effort required on the device movement and the destruction of the old pipeline is ensured by the implementation of the extender in the form of a truncated cone, the smaller of the grounds which, in contact with the base trubarevo body, is located coaxially with him and equal to him in diameter, and a larger base is shifted in the radial direction towards the knife on the value of eccentricity equal to polprasert d is amerov reason extender. This will deform the old pipeline mainly weakened by cutting zone.

Reducing the likelihood of crumbling walls of the well and damage nearby communications is achieved by replacing the dynamic (impact) principle of the device to a static (unstressed). In addition, if necessary, destruction of pipelines of ductile materials (steel, polyethylene and others), knife trubarevo body is placed in the lower part of the old pipeline, with the extender pull the old line from the bottom of the section, for forming wells “roof”. It further protects the well from caving and eliminates the loss of ground in the area of pulling through the new pipeline, which leads to its inhibition and seizure.

In case of damage or dulling of the knife, the device may be a simple and quick replacement, which is ensured by the presence in Taborstrasse body located radially groove.

Figure 1 shows the proposed device (longitudinal section); figure 2 - section a-a in figure 1; figure 3 - guiding device; figure 4 is a view In figure 3; figure 5 - extender (longitudinal section); figure 6 With figure 5.

A device for the trenchless replacement of underground piping consists of trubarevo body 1 with the knife 2, yameogo expander 3 to increase the diameter of the hole, indentation of the broken pipe into the surrounding soil and pulling in the new pipe, a removable guide device 4 and the traction element 5 made in the form of an integral metal rod (figure 1). The knife 2 is made removable and is located in the groove trubarevo body 1 (figure 2). A guiding device 4 by means of a nut 6 with washers 7, 8 attached to the front of trubarevo body 1 and rests on the knife 2 and fixing it in the groove. A guiding device 4, which centers the device in the old pipe 9 made of spring steel and is made in the form of elastic blades with concave inward ends (3, 4). The petals have the ability pliability when forces in the radial direction greater than their strength elasticity that allows the guiding device 4, Contracting and rasimas, pass roughness of the inner surface of the destroyed pipe 9. The concavity of the ends of the petals of the sending device 4 inside improves the ability to overcome them obstacles in the old pipe 9. The traction element 5 is attached to the device with a finger 10 with retaining ring 11 through the hole in the bolt 12. The expander 3 is a truncated cone (figure 5, 6), the smaller of the grounds of which the diameter D1in contact with the base t is ubersreik body 1, located coaxially with him and equal to him in diameter, and a larger base diameter D2displaced in the radial direction towards the knife on the value of eccentricity εequal polprasert diameters of the bases of the expander 3

moreover, the symmetry plane of the knife and extender, passing, respectively, along axis a-a (figure 2) and the axis (6)coincide, and forming a side surface EF extender 4 and forming a side surface FG trubarevo body 1 (Fig 1, 5) are located on one straight line. This allows us to deform the old pipe 9 mainly weakened by cutting zone and thereby reduce the effort required on the device movement and the destruction of the old pipe 9. New pipeline 13 is attached to the device by screws 14 through the glass 15, which together with the expander 3 is connected with the rear part trubarevo body 1 by screws 16.

The device operates as follows.

Positioning in one of the pits, the device is slid into the old pipe 9, the pre-combine it with a missing through replaceable pipe 9 composite rod 5 and the new pipeline 13. Under the force transmitted composite rod 5 from the power hydraulic system (not shown), the device statically (unstressed) moves forward and speaker who AGROSALON body 1 destroys the old pipe 9, at the same time expanding formed by the well and pulling in a new pipe 13 a larger outer diameter. If necessary, the destruction of pipelines of ductile materials (steel, polyethylene and others) knife 2 trubarevo body 1 is placed in the lower part of the old pipe 9, which eliminates the spillage of soil between the walls of the old and new pipelines and thereby to reduce the force on the pulling through the last.

The design of the proposed device for the trenchless replacement of underground pipelines ensures high operational reliability (low probability of crumbling walls of the well and damage nearby communications; the ability to change the knife if it break or malfunction), and reduces the effort required for the destruction of the old pipeline.

A device for the trenchless replacement of underground pipelines containing Taborstrasse body with a knife, the traction element and the extender to increase the diameter of the hole, indentation of the broken pipe into the surrounding soil and pulling in the new pipe, characterized in that before drubertragen body installed United with him removable guiding device made in the form of elastic blades with concave inward ends, tuberosa the statutory body located radially groove, which features a knife with replacement, and the extender to increase the diameter of the hole is made removable in the form of a truncated cone, the smaller of the grounds which, in contact with the base trubarevo body, is located coaxially with him and equal to him in diameter, and a larger base is shifted in the radial direction towards the knife on the value of eccentricity equal to polprasert diameters of the base of the extender.



 

Same patents:

FIELD: construction engineering.

SUBSTANCE: invention relates to pipeline transport and it can be used at repairs of main lines. Prior to replacing defective section of main line transporting combustible or explosive liquids and gases, section to be repaired is emptied, defective spool is cut out with provision of isolation of combustible and explosive gases and liquids from welding site by placing overlapping members at ends of pins adjoining section under repair, and new spool is welded in place. Prior to welding new spool placed between overlapping members, inert gas is fed into space of new spool and pressure in built exceeding pressure in adjoining sections of pipeline under repair.

EFFECT: improved safety at repairs.

2 dwg

FIELD: building, particularly for laying pipelines, for constructing buried passages during pipeline laying, laying cable lines and power lines.

SUBSTANCE: device has hollow conical working tip connected with stem through hinge and through rotary support. Stem is secured in rotary supports to flange mounted on front end of pipeline in the line of puncture direction. Installed in pipeline to be laid is vibrator drive connected to stem. Device has cage connected to stem, vibrator forming circular vibrations and made as unbalance. Unbalance is formed as hollow cylinder sector arranged inside working tip on rotary supports and connected to cage. Device also includes feeding mechanism.

EFFECT: increased operational efficiency.

4 dwg

FIELD: building, particularly construction of underground pipelines.

SUBSTANCE: device adapted to perform movement along trench comprises container for pipeline billets, means for progressive extraction thereof, hardening resin storage tank, means for continuous impregnating fibrous billet base with hardening resin as billet is fed in trench, means for pumping compressed air into billet cut to impart cylindrical shape to it after billet laying in trench and resin hardening means. Fibrous billet base is provided with loom of crossing threads. Method of pipeline assembling involves arranging billet cut near trench; impregnating fibrous billet base with hardening resin; covering billet cut with tubular protective shell; laying billet cut in flattened state into trench in top-down direction; closing ends thereof; pumping compressed air with the use of pneumatic means to impart cylindrical shape to billet cut; hardening resin by heating thereof with the use of electrical resistors built in fibrous billet blank.

EFFECT: simplified pipeline assemblage.

8 cl, 14 dwg

Ballasting device // 2246656

FIELD: construction.

SUBSTANCE: ballasting device has ballasting plate which is set in working position by horizontal rotation and introducing it in the undisturbed soil. The plate is set in rotation with the axle provided with the bell-crank actuated with traction mechanism. The bottom end of the axle is sharpened. The top end is provided with a tip for the bell-crank. Upon setting the ballasting plate in working position, the hinges of the plate are provided with ties which lock the pipeline with yokes.

EFFECT: expanded functional capabilities.

2 cl, 2 dwg

FIELD: construction.

SUBSTANCE: working member comprises rotors provided with teeth arranged symmetrically with respect to the axis of pipeline and provided with drive and mechanism for bringing the rotors together and moving them apart. Each rotor is provided with cleaning device which is arranged behind the rotor and secured to the unmovable segment of the working member for keeping it unmovable or permitting rotation. The cleaning members permanently co-operate with the outer side of the rotor.

EFFECT: enhanced efficiency.

1 dwg

FIELD: construction.

SUBSTANCE: pipeline has triply connected supports mounted on the stable sections above and under the slope subject to creep, one connected supports arranged over the subject to creep slope, and deformation compensator. The distance between the upper support and site of the deformation compensator arranged below the slope subject to creep is determined from the formula proposed.

EFFECT: enhanced reliability of the pipeline.

2 dwg

FIELD: pipeline transport.

SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.

EFFECT: expanded functional capabilities.

3 dwg

FIELD: construction.

SUBSTANCE: pipeline is laid on the concave part of the longitudinal section of the trench bottom on the layer of soft soil and is locked by filling one or two layers of soil with compacting. Screw vertical anchors and load-carrying belts are then mounted. Before filling the trench, the space between the belt and pipeline is provided with a cloth of unwoven synthetic material.

EFFECT: enhanced reliability of pipeline locking.

4 dwg

FIELD: laying or reclaiming pipes.

SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

FIELD: construction engineering; erection of underground pipe lines in permafrost soils, in bogs and in flooded and marshy areas.

SUBSTANCE: proposed polymer container ballasting unit has two distance rigidity frames located on both sides from pipe line, reservoirs made from polymer commercial cloth and filled soil which are secured to said frames, anti-erosion partitions and upper and lower weighting belts. Distance rigidity frames are curvilinear in form and their height exceeds diameter of pipe line being ballasted. Bend of each frame is made at obtuse angle and lower part of each frame is inclined towards pipe line relative to trench bottom. Polymer commercial cloth laid along pipe line makes distance frame rest against ground of trench bottom both in filling the reservoirs with soil and at action of pushing-out load.

EFFECT: extended functional capabilities.

3 cl, 1 dwg

FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.

EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

3 cl, 3 dwg

FIELD: construction engineering; erection of pipe lines in thawing permafrost soils and in flooded areas.

SUBSTANCE: proposed method includes ditching at trench with widened areas located at definite distances and pipe line is laid on bottom of trench. Pipe line is covered with flexible rugs and bottom of trench at widened areas is also covered with rugs; edges of rugs are fastened in widened areas and trench is filled. Used as anchor member are cylindrical textile containers placed in lugs of flexible rugs in parallel with pipe line and filled with soil. Prior to fastening the edge sections of flexible rugs, each of them is tightened at fixation of tension; preliminary tension of edge sections is effected during filling the widened areas and trench soil ensuring contact of flexible rugs with bottom of widened areas and trench. Filling the widened areas and trench is performed in direction towards pipe line, symmetrically relative to it.

EFFECT: enhanced reliability of attachment of pipe line at 0required marks.

13 cl, 4 dwg

FIELD: construction engineering; erection of pipe lines in permafrost soils at alternating terrain.

SUBSTANCE: trench in smooth terrain and in sections cut by hydrographic net is dug in active layer at depth sufficient for location of upper generatrix of pipe line above level of daily level. Prior to laying the pipe line, bottom walls and berms of trench are lined with cloth of non-woven synthetic material. backfill soil is placed in ballasting polymer panel-type devices or in ballasting polymer container-type units suspended from pipe line. Anti-erosion partitions made from non-woven synthetic material are formed in sloping sections together with funnel whose neck is located downward of water flow embracing the pipe line at specified clearance between neck and pipe line. Funnel is formed by covering the natural slope of backfill soil by free lower edge of non-woven synthetic material with ballasting polymer panel-type or ballasting polymer container-type devices placed on lower portion of funnel followed by subsequent removal of embankment protecting the pipe line. As far as sections of route cut by hydrographic network are concerned, anti-erosion partitions are formed in trench at transients with opposite slopes of microterrain; anti-erosion partitions are made from anti-erosion cloths and backfill soil is placed n soil-filled weighting materials attached to pipe line. At low points where opposite sections cross, water pass or water bypass structure is formed in trench.

EFFECT: enhanced reliability; reduced scope of earth-moving work; enhanced stability of pipe line in horizontal plane.

9 cl, 8 dwg

FIELD: pipe line transport; major repair of pipe lines.

SUBSTANCE: proposed method includes introducing the front end of pipe into damage pipe and forming hermetic cavity in inter-pipe space; then, pressure air (gas) is charged into hermetic cavity for motion of new pipe inside damaged pipe, after which piston is fitted at end of new pipe and detachable flange is connected to rear end of damaged pipe; motion of new pipe is effected by periodic charging of air into hermetic cavities; each hermetic cavity is bounded by piston and seal.

EFFECT: reduction of tractive force.

5 dwg

FIELD: construction engineering; erection of underground pipe lines in permafrost soils, in bogs and in flooded and marshy areas.

SUBSTANCE: proposed polymer container ballasting unit has two distance rigidity frames located on both sides from pipe line, reservoirs made from polymer commercial cloth and filled soil which are secured to said frames, anti-erosion partitions and upper and lower weighting belts. Distance rigidity frames are curvilinear in form and their height exceeds diameter of pipe line being ballasted. Bend of each frame is made at obtuse angle and lower part of each frame is inclined towards pipe line relative to trench bottom. Polymer commercial cloth laid along pipe line makes distance frame rest against ground of trench bottom both in filling the reservoirs with soil and at action of pushing-out load.

EFFECT: extended functional capabilities.

3 cl, 1 dwg

FIELD: laying or reclaiming pipes.

SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

FIELD: construction.

SUBSTANCE: pipeline is laid on the concave part of the longitudinal section of the trench bottom on the layer of soft soil and is locked by filling one or two layers of soil with compacting. Screw vertical anchors and load-carrying belts are then mounted. Before filling the trench, the space between the belt and pipeline is provided with a cloth of unwoven synthetic material.

EFFECT: enhanced reliability of pipeline locking.

4 dwg

FIELD: pipeline transport.

SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.

EFFECT: expanded functional capabilities.

3 dwg

FIELD: construction.

SUBSTANCE: pipeline has triply connected supports mounted on the stable sections above and under the slope subject to creep, one connected supports arranged over the subject to creep slope, and deformation compensator. The distance between the upper support and site of the deformation compensator arranged below the slope subject to creep is determined from the formula proposed.

EFFECT: enhanced reliability of the pipeline.

2 dwg

FIELD: construction.

SUBSTANCE: working member comprises rotors provided with teeth arranged symmetrically with respect to the axis of pipeline and provided with drive and mechanism for bringing the rotors together and moving them apart. Each rotor is provided with cleaning device which is arranged behind the rotor and secured to the unmovable segment of the working member for keeping it unmovable or permitting rotation. The cleaning members permanently co-operate with the outer side of the rotor.

EFFECT: enhanced efficiency.

1 dwg

Up!