The way transportation pipe
As the driving force equal to the force of resistance at constant speed movement of the pipe, i.e., Qd=Qwithhence the necessary air pressure to move tube
< / BR>i.e., R12,21 kgf/cm2when R2=0.Here it should be borne in mind that the reference pressure is from atmospheric taken as zero.The power of Qc= 25000 kgf will be in the back.From this condition we find the weight of the trailer
< / BR>HereSP=05 - coefficient-of-friction bearing part of the suspension device with the ground, on which is located the trailer.The pressure in the cavity of the tube between the piston and the flange on the condition of the piston and trailer
< / BR>The calculation results show that the proposed method of transportation pipes should very low air pressure, which provides movement of the tubes of great length, when the low power of the compressor motor without the use of any means of transporting.Small engine compressor is determined by the fact that the receiver is filled with air under pressure for a long time - long before pipe laying and during transportation of the pipe support pressure P2the compressor and the receiver in the cavity formed by the piston 3 and the flange 4. The method of conveying pipe, which consists in the fact that the new pipe choke and move cyclically within the deteriorated pipe, which serves the working agent under pressure on opposite sides of the piston placed in the cylinder, with respectively perform one move the pipe forward and the return of the piston in the original pennou the piston and the front cover of the pipe, and to return the piston to its original position raises the pressure in the cavity of the cylinder formed by the piston and the flange, the injection of air into it, creating the movement of the piston by the pressure difference in both the cavity and from the cavity formed by the piston and the flange of the cylinder after the piston reaches the original position of the air release, then the cycles of movement of the pipe again to exit its front end into the pit.
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.
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
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.
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.
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.
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.