Pipeline lowering assembly line and pipe lowering method

Abstract

A pipeline lowering assembly line and a pipe lowering method. A flat-terrain assembly line is arranged at the front end of a starting end of trench excavation, and a conveying device (1) is laid from the front end to the starting end of the trench excavation. From the front end of the trench excavation to the starting end thereof, the conveying device (1) is sequentially connected in series to a pipeline frame (2), a welding platform (3), an inspection platform (4), a joint coating platform (5), a limiting platform (6), a trench support (7) and a puller (8). By means of the connection between the puller (8) and an excavator, trench excavation and pipe lowering are carried out synchronously. A mountain-terrain assembly line is arranged in a trench that has been excavated in mountain terrain. The mountain-terrain assembly line is provided with a laying device (1A) from a lower slope to a higher slope. The laying device (1A) is sequentially connected in series to a reciprocating platform (2A), a welding platform (3A), an inspection platform (4A) and a joint coating platform (5A). The mountain-terrain assembly line is provided with pipeline brackets (6A) in gaps between the reciprocating platform (2A), the welding platform (3A), the inspection platform (4A) and the joint coating platform (5A) and inside the trench above the laying device (1A). The trench is provided with a winch (7A) at the top of a slope.

Description

Pipeline lowering pipeline and pipeline lowering method TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline construction, and particularly relates to a pipeline lowering pipeline and a pipeline lowering method. BACKGROUND

[0002] The construction period is the cost, and the prolonged construction period causes a sharp increase in construction cost; the site is the efficiency, and the disordered site leads to complex equipment movement lines and reduced action efficiency. The pipeline construction site should fully utilize the length of the road and reduce the width occupation. In the prior art, the pipeline construction in plain areas still follows the steps of pipe arrangement, welding processing, trench excavation and pipeline lowering, and under the construction conditions of extremely nervous urban land resources and urgent construction period, the traditional pipeline construction mode needs to be innovated in terms of construction equipment or method.

[0003] In the prior art, the pipeline construction environment in mountainous areas is complex, the topography and geomorphology are variable, the climate in small watersheds is significant, and the pipeline passing space is limited. There are many steep slopes and gullies, the construction operation zone is in a discontinuous state, the construction accompanying road and the construction access road are difficult to build, and the rugged road leads to the difficulty of large mechanical vehicle access and transfer. At the same time, the topography in mountainous areas is undulating, and the line turning is variable. The above factors lead to the fact that the pipeline transportation and pipe arrangement construction in mountainous areas are significantly more difficult than in plain areas.

[0004] The pipeline in mountainous areas has more stone parts and no road supporting areas than the pipeline in plain areas, and the construction difficulties mainly concentrate on the construction machine access, pipeline transportation and arrangement, trench backfilling and hydraulic protection. If the pipeline arrangement process can be integrated, the above difficulties will be weakened, and the prior art lacks a flow-line operation line for pipeline arrangement in mountainous areas. SUMMARY

[0005] The application provides a pipeline lowering pipeline, which can solve the problems of excessive road width occupation and long construction period in traditional pipeline lowering.

[0006] The technical scheme of the application is as follows:

[0007] In a first aspect, a pipeline lowering pipeline is provided, which is arranged at the front end of the starting end of the trench excavation, and a conveying device is arranged from the front end to the starting end of the trench excavation. The conveying device is sequentially connected from the front end to the starting end of the trench excavation, and comprises:

[0008] A pipeline rack is arranged on one side of the conveying device, and the pipeline rack is used for storing pipeline units and conveying the pipeline units to the conveying device.

[0009] A welding platform, which is spaced apart from the pipeline rack and has a length corresponding to the pipeline, comprises a connecting unit and a welding unit, the connecting unit is used for aligning the head and tail of two continuous pipelines, and is used for welding a pipeline fitting and the joint between the head and tail of the two continuous pipelines; the fitting comprises a towing head arranged at the front end of the first pipeline section;

[0010] A flaw detection platform, which is spaced apart from the welding platform and has a length corresponding to the pipeline, is used for detecting the welding quality of the head and tail of the pipeline;

[0011] A joint coating platform, which is used for winding anticorrosive material around the head and tail of the pipeline;

[0012] A limiting platform, which comprises a support and a locking device, the locking device has a sleeve that can allow the pipeline to pass through and a tightening member that clamps the sleeve;

[0013] A pipeline trench support, which is fixed to the ground and can be inclined to extend into the pipeline trench, is provided with a pulley that supports the pipeline;

[0014] A towing device, which comprises two hooks, the two hooks are connected by a basket screw and a spring, the hook at one end of the basket screw is connected to the towing head, and the hook at one end of the spring is connected to the bottom of the excavator.

[0015] In a second aspect, based on the pipeline, the application provides a pipeline laying construction method for a plain, which comprises the following steps:

[0016] S01) Leveling the site, and arranging the pipelines along the pipeline trench in the extension direction of the pipeline rack;

[0017] S02) The pipeline rack delivers the pipelines to the conveying device;

[0018] S03) When the first pipeline enters the welding platform, a towing head is welded at the front end of the pipeline, and at the same time, the second pipeline is delivered to the conveying device;

[0019] S04) The towing head of the first pipeline enters the flaw detection platform for welding quality detection, and at the same time, the front end of the second pipeline is aligned with the rear end of the first pipeline along the central axis and is welded and connected by the welding unit;

[0020] S05) The rear end of the first pipeline enters the joint coating platform to wind anticorrosive material, at the same time, the rear end of the second pipeline enters the flaw detection platform for welding quality detection, and at the same time, the rear end of the third pipeline is welded and connected to the front end of the fourth pipeline by the welding unit;

[0021] S06) The tightening member is loosened so that the first pipeline sequentially passes through the tightening member and the pipeline support and then enters the pipeline trench;

[0022] S07) The excavator enters the trench or straddles the trench, and a traction head is installed between the two tracks;

[0023] S08) A traction device is installed between the traction head of the first pipeline and the traction head of the excavator, the excavator continuously excavates the trench from the starting end of the trench excavation, and the pipeline connection progress is matched with the excavation distance according to the control of the pipeline start-up or shutdown.

[0024] Further, in step S08), when there is a large amount of underground water in the trench, a float is installed on the pipeline lowered into the trench;

[0025] When there is no underground water in the trench, a detachable pulley block is installed under the pipeline lowered into the trench.

[0026] Further, the method further comprises:

[0027] S09) When the pipeline reaches the end point, the connection between the traction device and the pipeline traction head is removed. In order to prevent danger, a spring and a basket screw are used to connect between the traction device hooks. The connection can move freely, the stress between them has been released, and the basket screw is adjusted until the spring returns to the original length, and then the traction device is removed.

[0028] Further, in step S09), when the pipeline reaches the end point, there is a certain height difference between the end point and the starting point. It is difficult to remove the connection between the traction device and the pipeline traction head, and part of the pipeline can be buried to ensure that the pipeline cannot be displaced. The connection between the traction device and the pipeline traction head is removed under the condition of ensuring safety to prevent accidental injury.

[0029] In a third aspect, the application provides a pipeline lowering assembly line for mountain pipeline construction, which is arranged in a trench that has been excavated in a mountain, and is arranged from low slope to high slope and provided with a laying device, and the laying device is sequentially connected with:

[0030] A reciprocating platform, which is used to transport the pipeline unit by reciprocating movement;

[0031] A welding platform, which is spaced apart from the reciprocating platform by a distance corresponding to the length of the pipeline, and comprises a connecting unit and a welding unit. The connecting unit is used to align the head and tail of two continuous pipelines, and is used to weld accessories for the pipeline and to weld the head and tail of the two continuous pipelines; the accessories include a traction head arranged at the front end of the first pipeline section;

[0032] A flaw detection platform, which is spaced apart from the welding platform by a distance corresponding to the length of the pipeline, and is used to detect the welding quality of the head and tail of the pipeline;

[0033] A joint coating platform, which is used to wrap anticorrosive material around the head and tail of the pipeline;

[0034] The pipeline is laid in the pipeline trench by the pipeline laying device, and the pipeline laying device is arranged in the pipeline trench.

[0035] The pipeline bracket comprises a support column embedded in the pipeline trench and a bracket platform fixedly connected with the support column, the bracket platform is sequentially provided with a conveying roller and a pipe support along a pipeline moving direction, the pipe support has a cylindrical cavity, and a one-way locking mechanism allowing only the pipeline unit to pass in one direction is arranged in the inner wall of the cavity.

[0036] The pipeline trench is provided with a slope top.

[0037] The winch has a steel wire rope connected with the traction head.

[0038] Further, the reciprocating platform comprises a moving platform, a lead screw passing through the moving platform in the center, and a limiting rod passing through the moving platform and arranged on both sides of the lead screw, the lead screw drives the moving platform to move reciprocally by a motor, and the moving platform is provided with a pipeline support and a baffle arranged at the rear side of the pipeline support.

[0039] The back of the jointing platform is further provided with a limiting platform, the limiting platform comprises a support and a locking device, the locking device has a sleeve allowing the pipeline to pass through and a tightening member clamping the sleeve.

[0040] In a fourth aspect, based on the pipeline, the application provides a pipeline laying construction method, comprising the following steps:

[0041] S01) excavating a pipeline trench, and arranging a pipeline laying device from a low slope to a high slope in the pipeline trench;

[0042] S02) resetting the reciprocating platform at an initial position, placing a pipeline unit in a pipeline support, starting a motor controlling a lead screw, and feeding a first pipeline into a welding platform;

[0043] S03) when the first pipeline enters the welding platform, welding a traction head at the front end of the pipeline, and fixing a steel wire rope with the traction head;

[0044] S04) starting a winch to pull the traction head of the first pipeline to a flaw detection platform for welding quality detection, simultaneously, the reciprocating platform returns to the initial position to load a second pipeline, and the second pipeline is moved to the welding platform, so that the front end of the second pipeline is aligned with the rear end of the first pipeline along a central axis and welded and connected by a welding unit;

[0045] S05) Start the winch to pull the first pipeline rear end into the joint platform, at the same time, the second pipeline rear end enters the flaw detection platform to carry out the welding quality detection, at the same time, the third pipeline rear end is welded to the fourth pipeline front end through the welding unit on the welding platform, and the reciprocating platform returns to the initial position to load the fourth pipeline and move it to the welding platform;

[0046] S06) Continue to pull the first pipeline, when the fourth pipeline front end is aligned with the third pipeline rear end, fasten the tightening member; when the fourth pipeline front end is welded to the third pipeline rear end, loosen the tightening member and continue to pull the first pipeline to make the first pipeline pass through the tightening member and be connected with the first pipeline bracket;

[0047] S07) According to steps S04) to S06), each pipeline is processed in turn, and the pipeline connection progress is matched with the pulling distance according to the pipeline processing progress to control the start or stop of the winch and the pipeline.

[0048] Further, when all the pipelines reach the predetermined position, the trench is backfilled after the conveying roller is cut and recycled.

[0049] Due to the adoption of the above technical solutions, the application has the following beneficial effects:

[0050] In the technical solution of the pipeline construction in the plain:

[0051] 1. The pipeline in the application changes the traditional pipeline arrangement method of "connecting first and then laying down". In the technical solution of the pipeline laying pipeline in the application, the connection and laying down are sequentially performed, that is, it is not necessary to connect several pipelines first and then place the pipelines in the trench. The technical solution of the application can significantly reduce the width of the construction site. Specifically, arranging the pipelines in sequence will occupy the transverse space outside the trench, and the pipelines are generally stacked, and moving the pipelines will complicate the equipment movement line. The equipment goes back and forth in the construction site, is hoisted, and the efficiency is significantly reduced. In addition, during the continuous excavation process, only the construction space on both sides of the trench needs to be reserved, and the movement of the pipelines is carried out in the trench, that is, the application makes full use of the internal space of the excavated trench, which can significantly reduce the reserved construction space on both sides of the trench. After reducing the construction space, the land acquisition area is greatly reduced, so the land acquisition cost and the later vegetation restoration cost are reduced, and the operation cleaning time is shortened.

[0052] 2. The application can fully coordinate the pipe laying progress and the trench excavation progress, and simultaneously carry out the pipe laying in the process of pipeline excavation, which not only saves the hoisting and pipe laying steps and reduces the construction equipment, but also enables the excavator to play its traction role and reduce the equipment rental cost. In the application, the welding platform, the joint repairing platform and the flaw detection platform all have mature existing technologies as support, which can significantly improve the connection quality of the pipeline and avoid rework. The application innovatively uses the excavating equipment as a traction device, thereby replacing the traditional pipe laying. Furthermore, the application combines the pipe laying, trench excavation and pipeline laying into one, thereby improving the construction efficiency, saving the construction cost and reducing the construction period.

[0053] 3. The pipe laying pipeline technical scheme of the application has a pipe limiting platform, which is designed separately to cooperate with the back-end effect generated in the process of pulling the pipeline. In the process of pulling the pipeline, the rear end of the connected pipeline will generate a large displacement, which will affect the welding construction of the upstream pipeline and also bring safety hazards to the site construction personnel. By designing the limiting platform, the displacement and angle of the pipeline in the pipeline are controlled, which can ensure the normal operation of the pipe laying pipeline. The pipeline is intermittent work, when the downstream is higher than the upstream, the limiting device can clamp the pipeline to prevent the pipeline from sliding under the action of gravity, thereby avoiding the sliding impact on the welding process of the upstream pipeline. When the downstream is lower than the upstream, the limiting platform can control the upstream to ensure the smooth progress of the connection process.

[0054] 4. The tractor in the application is designed to cooperate with the limiting device and the construction progress. When the traction process is paused, the pipeline will have an inertial impact, and the spring in the tractor can offset the impact force. In fact, in the process of pipeline traction, it is not a strict straight path, and the pipeline is laid in an elastic manner, which will generate a torsional force in the process of traction. The spring and basket screw in the tractor can reduce the torsional force by rotating to release the stress. Moreover, the basket screw can be rotated to adjust the length of the tractor to prevent injury to the construction personnel when it is removed.

[0055] In the technical scheme of mountain pipeline construction:

[0056] 1. The pipeline in the application directly completes the whole process of pipeline processing in the trench. The technical scheme of the application can significantly reduce the occupied area of mountain construction. The application makes full use of the internal space of the excavated trench, which can significantly reduce the reserved construction space on both sides of the trench. After reducing the construction space, the mountain occupation area is greatly reduced, and the operation cleaning time is also shortened.

[0057] 2. The application reduces the safety risk in the construction process. The application simplifies pipeline transportation, reduces the workload and risk of transportation pipeline. In steep or narrow sections, excavation work is easy to cause slope instability and may cause landslides. The space is small in mountainous operations, and the welding environment is poor, which is easy to cause welding defects and hidden leakage. When working in mountainous areas, large machinery (such as pipe hoisting machines and excavators) is prone to accidents such as vehicle sliding, rollover, and collision. The pipeline in mountainous areas is narrow and rugged, and the pipe transportation process is prone to pipe rolling and vehicle overturning. The intensive design in the application can improve the construction environment. After the trench is excavated, personnel only need to lay pipes, weld, detect defects, and repair joints at the front end of the trench, thereby reducing large-scale mechanical operations, reducing the pipe transportation process, and significantly reducing the operation time of dangerous procedures.

[0058] 3. In the application, the reciprocating platform moves the pipeline reciprocally. The reciprocating platform is small in size and easy to place in the trench. Since the reciprocating platform is inclined, if no baffle is provided, the pipeline will slide down, and therefore the baffle can prevent the pipeline from sliding down and push the pipeline into the welding platform.

[0059] 4. In the application, the winch on the top of the slope is used as a processing device and a traction device. In the application, the welding platform, the joint repairing platform, and the defect detection platform all have mature existing technologies as support, which can significantly improve the connection quality of the pipeline and avoid rework. The application innovatively uses the winch as a processing device, and controls the processing progress through traction. Furthermore, the application combines the pipe laying, pipeline connection, and pipeline traction into one, thereby improving the overall construction efficiency.

[0060] 5. The application intensifies each device required for pipeline pipe laying, thereby reducing the construction site occupation. The above advantages are more significant in rugged mountainous areas. On the one hand, the mechanical equipment workload can be reduced and the construction efficiency can be improved. On the other hand, the intensive assembly line has stronger adaptability to the site and can work in more complex construction sites.

[0061] 6. The lifting process of mountainous construction should always be vigilant about the pipeline falling off. The application forms a three-layer anti-falling structure through the steel wire rope, the one-way locking mechanism in the pipe support, and the tightening piece, which can effectively prevent the pipeline from falling off and sliding down from the whole and the part. Specifically, the steel wire rope forms a whole traction from the first pipeline, which is a bottom measure to prevent sliding. Locally, the one-way locking mechanism can be made of hard rubber, so the setting of the one-way locking mechanism only allows the pipeline to pass through the cavity in one direction. When the pipeline breaks and slides during traction, the front pipeline is still pulled by the steel wire rope, while the rear pipeline is blocked by a large number of one-way locking mechanisms. The one-way locking mechanisms in each cavity can form a continuous blocking effect to prevent the pipeline from sliding down.

[0062] 7. The application has general applicability. In mountainous areas, the application is still applicable to construction projects that do not require trenching. Specifically, the support column of the application can be directly fixed to the mountain surface, and the pipeline bracket is both a construction tool and a part of the project entity, reducing construction costs. The pipeline is constructed through the pipeline assembly line. This method can greatly improve the construction efficiency, and does not require backfilling process, which can significantly reduce the damage to the ecological environment and the cost of later soil and water conservation. The technical solution of the application is also applicable in plain areas. BRIEF DESCRIPTION OF DRAWINGS

[0063] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The schematic embodiments of the application and their descriptions are used to explain the application, and do not constitute an improper limitation on the application.

[0064] Fig. 1 is a schematic diagram of a pipeline assembly line provided by the application;

[0065] Fig. 2 is a schematic diagram of a limiting platform in the application;

[0066] Fig. 3 is a schematic diagram of a trench support in the application;

[0067] Fig. 4 is a schematic diagram of another pipeline assembly line provided by the application;

[0068] Fig. 5 is a front view of a reciprocating platform in the application;

[0069] Fig. 6 is a side view of the reciprocating platform in the application;

[0070] Fig. 7 is a top view of the reciprocating platform in the application;

[0071] Fig. 8 is a front view of a pipeline bracket in the application;

[0072] Fig. 9 is a side view of the pipeline bracket in the application;

[0073] Fig. 10 is a top view of the pipeline bracket in the application;

[0074] Fig. 11 is a schematic diagram of a limiting platform in the application;

[0075] In the drawings: 1, conveying device; 1-1, transmission shaft; 1-2, drive wheel; 2, pipeline rack; 3, welding platform; 4, flaw detection platform; 5, joint repairing platform; 6, limiting platform; 6-1, support; 6-2, sleeve; 6-3, tightening piece; 7, pipeline trench support; 8, tractor; 8-1, hook; 8-2, basket screw; 8-3, spring; 9, traction head; 1A, laying device; 2A, reciprocating platform; 2A-1, lead screw; 2A-2, limiting rod; 2A-3, baffle; 2A-4, pipeline support; 2A-5, moving platform; 3A, welding platform; 4A, flaw detection platform; 5A, joint repairing platform; 6A, pipeline support frame; 6A-1, support column; 6A-2, support platform; 6A-3, conveying roller; 6A-4, pipe support; 6A-5, cavity; 6A-6, one-way locking mechanism; 7A, winch; 7A-1, steel wire rope; 8A, limiting platform; 8A-1, support; 8A-2, locking device; 8A-3, sleeve; 8A-4, tightening piece. DETAILED DESCRIPTION

[0076] Based on the background art, the traditional pipeline construction is divided into trench construction and trench construction, and the trench construction completes most of the procedures, and the trench construction has fewer steps, mainly for pipe laying. The traditional pipeline laying needs to weld the pipeline in the construction site, carry out corrosion protection, detect the welding quality and a series of procedures. The equipment used in these procedures needs to occupy additional space of the pipeline trench. Based on this, the application provides a pipeline pipe laying assembly line, as shown in FIGS. 1-3, the assembly line is arranged at the front end of the starting end of the pipeline trench excavation, and the conveying device 1 is arranged from the front end to the starting end of the pipeline trench excavation. The conveying device 1 comprises a plurality of drive wheels 1-2, and each drive wheel 1-2 is driven by a motor through a transmission shaft 1-1. The motor drives each drive wheel 1-2 to rotate synchronously, and the interval between each platform can realize sequential processing. The starting end of the pipeline trench excavation is the front end of the starting end of the excavation, and the assembly line of the application is arranged in the front field.

[0077] The conveying device 1 is sequentially connected from the front end to the starting end of the pipeline trench excavation.

[0078] The pipeline rack 2 is arranged on one side of the conveying device 1, and the pipeline rack 2 is used for storing pipeline units and conveying the pipeline units to the conveying device 1. The pipeline rack 2 is used for stacking the required pipelines. When the pipeline is light, it can be conveyed to the conveying device 1 by manual method, and the pipeline can be manually pushed into the next process. As an example but not limitation, a conveyor belt can also be installed on the pipeline rack 2 to send it into the conveying device 1.

[0079] Welding platform 3, with the spacing of the pipeline rack 2 and the pipeline length, the welding platform 3 includes a connection unit and a welding unit, the connection unit is used to align the head and tail of two continuous pipelines, and is used for pipeline welding fittings and welding the head and tail of two continuous pipelines; the fittings include a traction head 9 arranged at the front end of the first section of pipeline. The traction head 9 is a component that can be connected with the tractor 8, which can be a ring as an example, and the hook 8-1 is hooked with the ring to form reliable connection. Before welding, the center line of the pipeline needs to be aligned by trial connection unit, and then welding is carried out. The connection unit is prior art, which can use a pipe alignment device. The conveying device 1 needs to be leveled during installation, so that the height of the pipeline in the conveying device 1 is basically consistent, and the alignment device can be used for fine adjustment of the connection unit to align the head and tail of the two pipelines. The welding unit can be manually welded or automatically welded. In specific operation, the selection of automatic welding machine and welding material is based on the pipe diameter, wall thickness and pipeline material. The automatic welding machine is set in a fixed position to automatically complete the whole welding process, including welding parameter adjustment and welding gun movement.

[0080] Flaw detection platform 4, with the spacing of the welding platform 3 and the pipeline length, the flaw detection platform 4 is used for detecting the welding quality of the head and tail of the pipeline. As an example but not limited, the application selects conventional ultrasonic detection, which is faster and more efficient. When the flaw detection platform 4 finds that the welding quality has problems, it needs to be reworked, the conveying device 1 is turned over to pull the pipeline back to the welding unit for rework. An automatic welding machine can also be separately arranged behind the flaw detection platform 4 or manually welded again.

[0081] The joint platform 5 is used for winding anticorrosive material for the head and tail of the pipeline. The joint platform 5 can be replaced by a general winding machine, and in pipeline construction, hot shrinkage sleeve or cold winding anticorrosive adhesive tape is usually used.

[0082] The limiting platform 6 includes a support 6-1 and a locking device, the locking device has a sleeve 6-2 that can accommodate the pipeline and a tightening member 6-3 that clamps the sleeve 6-2. As shown in FIG. 2, the sleeve 6-2 is C-shaped, and by applying pressure to the sleeve 6-2 through the tightening member 6-3, the opening of the sleeve 6-2 is reduced to achieve fixation.

[0083] The pipe trench support 7 is fixed to the ground and extends obliquely into the pipe trench, and the bottom of the pipe trench support 7 is provided with pulleys for supporting the pipelines at several heights. As shown in FIG. 3, the wheel set in the figure is the pulley. It should be noted that the pipeline has a modulus of elasticity, which can form a certain bending, which will not damage its function. Therefore, during the pipe laying process, the pipeline needs to be inclined into the pipe trench during the process of entering the pipe trench from the site, and since the depth of the pipe trench is generally shallow, about 1m-2m, the bending curvature of the pipeline can fully allow this pipe laying method. In specific operation, the pipeline burial depth should be determined according to the geographical location, such as being buried below the frozen soil in northern China. The pipe trench support 7 is fixed to the soil, and the pulleys at different heights can receive the pipeline at different positions to ensure that it is smoothly slid into the pipe trench.

[0084] The puller 8 includes hooks 8-1 at both ends, the hooks 8-1 are connected through a basket screw 8-2 and a spring 8-3, and the hook 8-1 at one end of the basket screw 8-2 is connected with the pulling head 9, and the hook 8-1 at one end of the spring 8-3 is connected with the bottom of the excavator.

[0085] In specific implementation, a hooking piece for hanging the hooks 8-1 is needed to be installed in the middle of the two tracks of the excavator, which can be a circular ring as an example.

[0086] The pipeline in the present application changes the mode of "connecting first and then laying" in the traditional pipe laying method. In the technical scheme of the pipeline laying process of the present application, the connection and laying are sequentially performed, that is, it is not necessary to connect several pipelines first and then place the pipelines in the pipe trench. The technical scheme of the present application can significantly reduce the width occupation of the construction site. Specifically, arranging the pipelines in sequence will occupy the transverse space outside the pipe trench, and the pipelines are generally stacked, and moving the pipelines will cause the device to complicate the moving line, and the device will come and go in the construction site, which will significantly reduce the efficiency. In addition, during the continuous excavation process, only the construction space needs to be reserved on both sides of the pipe trench, and the movement of the pipeline is carried out in the pipe trench, that is, the present application fully utilizes the internal space of the excavated pipe trench, which can significantly reduce the reserved construction space on both sides of the pipe trench. After reducing the construction space, the land acquisition area is greatly reduced, so the land acquisition cost and the later vegetation restoration cost are reduced, and the operation cleaning time is also shortened.

[0087] The present application can fully coordinate the pipe laying progress and the pipe trench excavation progress, and the pipe laying is carried out simultaneously during the pipeline excavation, which not only saves the hoisting and pipe laying steps and reduces the construction equipment, but also enables the excavator to play its traction role and reduces the equipment rental cost. In the present application, the welding platform 3, the joint repairing platform 5 and the flaw detection platform 4 all have mature existing technologies as support, which can significantly improve the connection quality of the pipeline and avoid rework.

[0088] When the above pipeline laying process is used, the pipeline laying construction tool body includes the following steps:

[0089] S01) Leveling the ground, arranging the pipeline on the pipeline rack 2 along the direction of the trench;

[0090] S02) The pipeline rack 2 transports the pipeline to the conveying device 1;

[0091] S03) When the first pipeline enters the welding platform 3, a traction head 9 is welded at the front end of the pipeline, and at the same time, the second pipeline is transported to the conveying device 1;

[0092] S04) The traction head of the first pipeline enters the flaw detection platform 4 for welding quality detection, and at the same time, the front end of the second pipeline is aligned with the rear end of the first pipeline along the center axis and is welded and connected by the welding unit;

[0093] S05) The rear end of the first pipeline enters the joint coating platform 5 to wrap the corrosion protection material, and at the same time, the rear end of the second pipeline enters the flaw detection platform 4 for welding quality detection, and at the same time, the rear end of the third pipeline is welded and connected with the front end of the fourth pipeline by the welding unit;

[0094] S06) Loosen the tightening member 6-3 to make the first pipeline pass through the tightening member 6-3 and the pipeline support 6-1 in turn and then enter the trench;

[0095] S07) The excavator enters the trench or straddles the trench on both sides, and the traction head 9 is installed between the two tracks;

[0096] S08) Install the tractor 8 between the traction head 9 of the first pipeline and the traction head 9 of the excavator, and the excavator continuously excavates the trench from the starting end of the trench excavation, and the pipeline connection progress is matched with the excavation distance by controlling the start and stop of the pipeline according to the excavation distance.

[0097] In step S08), when there is a large amount of underground water in the trench, a float is installed on the pipeline lowered into the trench;

[0098] When there is no underground water in the trench, a detachable pulley block is installed below the pipeline lowered into the trench.

[0099] S09) When the pipeline travels to the end point, the connection between the tractor and the pipeline traction head is removed. The connection can be freely moved, the stress between them has been released, and the flower basket screw 8-2 is adjusted at one end until the spring 8-3 returns to the original length, and then the tractor 8 is removed.

[0100] In step S09), when the pipeline travels to the end point, there is a certain height difference between the end point and the starting point. It is difficult to remove the connection between the tractor and the pipeline traction head, and part of the pipeline can be buried to ensure that the pipeline cannot be displaced. The connection between the tractor and the pipeline traction head is removed under the condition of ensuring safety to prevent accidental injury.

[0101] The lower pipe flow line technical solution of the present application has a pipe limiting platform 6, which is designed separately to cooperate with the rear-end effect generated in the pipe pulling process. In the pipe pulling process, the rear end of the connected pipe will generate a large displacement, which will affect the welding construction of the upstream pipe and also bring safety hazards to the site construction personnel. By designing the limiting platform 6, the displacement and angle of the pipe in the flow line are controlled, which can ensure the normal operation of the lower pipe flow line. The flow line is intermittent, when the downstream is higher than the upstream, the limiting device can clamp the pipe to prevent the pipe from sliding under the action of gravity, thereby avoiding the sliding impact on the welding process of the upstream pipe. When the downstream is lower than the upstream, the limiting platform 6 can control the upstream to ensure the smooth progress of the connection process.

[0102] The puller 8 in the present application is designed to cooperate with the limiting device and the construction progress. When the pulling process is paused, the pipe will have an inertial impact, and the spring 8-3 in the puller 8 can offset the impact force. In fact, in the pipe pulling process, it is not a strict straight path, and the pipe is laid in an elastic manner, which will generate a torsional force during the pulling process. The spring 8-3 and the basket screw 8-2 in the puller 8 can reduce the torsional force by rotating to release the stress. Moreover, the basket screw 8-2 can be rotated to adjust the length of the puller 8, preventing injury to the construction personnel when removing.

[0103] The above construction method realizes the synchronization of trench excavation and pipe laying, and the connection between pipes, pipe corrosion prevention, and excavation progress are all programmed, which can concentrate construction time, synchronize the construction progress of each construction group, reduce construction procedures, and greatly increase the efficiency of excavation and pipe laying.

[0104] Taking a 1KM buried pipeline of pipeline No. 20 Φ219x7 seamless steel pipe as an example, the improvement effect of the present application on construction time is described in detail. Assuming that the flow line of the present application and the traditional pipe laying have the same external constraints, only one electric welding device, the same machine and construction equipment, the same construction team, the same geological conditions, and the same engineering quantity.

[0105] The traditional method generally uses a truck crane on the construction site, and the truck crane needs to support the supporting legs every time it hoists and lays the pipe. The crane lays the pipe along the pipe direction, and then the supporting legs are hoisted after once in place. Normally, two pipes can be hoisted at a time. After hoisting, the supporting legs are retracted and moved forward, and the cycle is repeated. About 6 to 7 pipes can be laid per hour. Each pipe is about 10 meters long, and 1KM of pipe is about 100 pipes, so the pipe laying time needs 2 working days.

[0106] The device of the present application eliminates the pipe laying step in the construction method. When using the lower pipe flow line of the present application, it takes 2 hours to lay the flow line, check the equipment, and power on. After the pipe is in place, the trench excavation can be carried out.

[0107] One group of welds takes about 25 to 30 minutes. There are about 100 groups of welds in the 1KM pipeline, so it takes about 50 hours to complete the welding, which is about 6 days. After the pulley of the conveying device 1 is controlled to be at the same height during the installation of the equipment, the center group of the pipeline can be coincided by manual fine adjustment. In the specific implementation, the welding is preferably performed by the automatic welding equipment, and the welding equipment does not need to be moved, so that the welding efficiency can be greatly improved and the construction period can be reduced when the welding equipment is installed at a fixed position.

[0108] The welding work has the same workload, and the traditional welding method takes about 12 days, and the automatic welding machine at the fixed position can reduce 4 days. However, the pipeline of the application can be detected and corrosion-prevented while welding. After the traditional method of corrosion and repair is completed, the pipeline is dug by the excavator. Due to the construction surface and safety factors, the excavation task cannot be performed at the same time as the welding and corrosion. It needs to be staggered, and it takes 4 days to excavate 1KM, subtracts 2 days of cross-time that can be advanced, and needs to increase the construction period by 2 days. It takes 2 days to dig and backfill, and the whole process takes 4 days.

[0109] The application uses a pipeline to weld, detect, and corrosion-prevent at the same time, and excavate the pipeline trench and use the support 7 to dig the trench. Almost no additional construction period, and the pipeline is dug after the corrosion and repair are completed. It takes 2 days to dig and backfill. The pipeline trench excavation, digging, and backfilling can save 2 days.

[0110] Overall, the traditional method takes 26 days to complete the project, while the application can complete the project in about 12 days or less, saving 54% of the time, and the construction cost can be reduced by 20%.

[0111] In the specific implementation, there are three modes for pipeline trenching, which can basically solve various situations in plain areas.

[0112] The first mode is for the case where the pipeline trench is narrow, and the width of the pipeline trench is less than the width between the two tracks of the track-type excavator. The excavator can travel above the pipeline trench. The pipeline trench can be excavated in advance or excavated along with the pipeline processing. The excavator installs the support 7 and the tractor 8, excavates the pipeline trench, and simultaneously pulls the pipeline into the pipeline trench. The travel distance is controlled by GPS to ensure safety. The excavator works above the pipeline trench, and a pulley is installed under the pipeline after each pipeline is pulled.

[0113] The second mode is for the case where the pipeline trench is wide and the underground water is deep. The underground water level is deep, and the pipeline trench bottom does not see water. The excavating equipment can directly work in the excavated pipeline trench. The pipeline support 7 is fixed at the bottom of the trench to facilitate the pulling of the pipeline and prevent the pipeline from being worn during the pulling process. The subsequent steps are the same as the first mode.

[0114] The third is for the case of wide trench and shallow groundwater. For the area with dense water network and high groundwater level, especially when there is more rain, the trench excavation is accompanied by a large amount of open water, and the trench is full of water. The excavator with self-floating function can be used, and the tractor 8 is pulled at the bottom of the excavator. While excavating the trench, the pipeline is pulled into the trench. The pipeline floats on the water, and if the buoyancy is not enough, a float can be installed on the pipeline to better pull the pipeline using the buoyancy of the water. When this method is used, the water is turned into a construction aid to overcome the obstruction of water to construction. If there is less water in the trench, water can also be used to raise the water level to facilitate the pulling of the pipeline. After the pipeline is in place, the float is removed, and the water is tested and settled to the bottom of the trench, and the counterweight is added to prevent floating.

[0115] For mountain pipeline construction:

[0116] As shown in FIG. 4, the present application provides a pipeline lowering assembly line, which is arranged in the trench excavated in the mountain, and the assembly line is arranged from low slope to high slope with a laying device 1A, which is sequentially connected with:

[0117] The reciprocating platform 2A transports the pipeline unit for the assembly line by reciprocating movement. As shown in FIGS. 5-7, the reciprocating platform 2A reciprocates to transport the pipeline. The reciprocating platform 2A is small in size and is easy to place in the trench. Since the reciprocating platform 2A is inclined, if no baffle 2A-3 is arranged, the pipeline will slide down, and therefore the baffle 2A-3 can prevent the pipeline from sliding down and push the pipeline into the welding platform 3A.

[0118] The welding platform 3A is spaced apart from the reciprocating platform 2A by a length of the pipeline, and the welding platform 3A includes a connecting unit and a welding unit. The connecting unit is used to align the head and tail of two continuous pipelines, and is used to weld accessories for the pipeline and to weld the head and tail of two continuous pipelines. The accessories include a traction head arranged at the front end of the first section of pipeline.

[0119] The flaw detection platform 4A is spaced apart from the welding platform 3A by a length of the pipeline, and the flaw detection platform 4A is used to detect the welding quality of the head and tail of the pipeline.

[0120] The joint repairing platform 5A is used to wrap the head and tail of the pipeline with corrosion-resistant material.

[0121] It should be noted that the positions of the flaw detection platform 4A and the joint repairing platform 5A can be integrated together. Since the pipeline welding occupies a relatively long time, the flaw detection and joint repairing time is relatively short, and the two platforms can be arranged on both sides of the same position.

[0122] The assembly line is arranged in the interval of the reciprocating platform 2A, the welding platform 3A, the flaw detection platform A, and the joint repairing platform 5A, and in the trench above the laying device 1A.

[0123] The pipeline bracket 6A comprises a support column 6A-1 embedded in the pipe trench and a bracket platform 6A-2 fixedly connected with the support column 6A-1, the bracket platform 6A-2 is sequentially provided with a conveying roller 6A-3 and a pipe support 6A-4 along the pipeline moving direction, the pipe support 6A-4 has a cylindrical cavity 6A-5, and a one-way locking mechanism 6A-6 allowing only the pipeline unit to pass forward in one direction is arranged in the inner wall of the cavity 6A-5;

[0124] The one-way locking mechanism 6A-6 can be selected from, but is not limited to, a flexible friction bush with built-in inclined teeth, an inclined sliding block type and the like. The flexible friction bush uses the deformation of the flexible material and the friction force for limiting. In specific implementation, the flexible bush can be a cylindrical bush made of a material with high friction coefficient and high wear resistance, such as hard rubber, polyurethane, wear-resistant nylon and the like, the inner diameter of the bush is slightly smaller than the outer diameter of the pipeline, and there are one-way inclined sawteeth or wavy textures on the outer surface of the bush. A rigid outer shell (pipe support 6A-4) is arranged outside the flexible bush for restraining and supporting the flexible bush. When the pipeline advances (unlocked state), the pipeline advances and extrudes the inclined surface of the inclined teeth, and can pass freely. When the pipeline retreats (locked state), the pipeline retreats and is clamped into the inclined teeth, friction is generated, and the material deformation tightly holds the pipeline. The one-way locking mechanism 6A-6 in this form has low cost and can be batch injection molded or cast formed, and in the pipeline operation, the flexible material will not scratch the pipeline outer anticorrosion layer. In specific implementation, if the one-way locking mechanism 6A-6 adopts the inclined sliding block type, the sliding block is made of a material with high friction coefficient and high wear resistance (such as a polymer such as hard rubber, a hard alloy block and the like). The one-way locking mechanism of the inclined sliding block type needs to open several grooves on the inner wall of the pipe support 6A-4, the depth of the grooves is gradually deepened from bottom to top, and the sliding blocks are embedded in the grooves. When the sliding blocks are at the lowermost end of the grooves, the space surrounded by the sliding blocks has a diameter slightly smaller than the outer diameter of the pipeline, when the pipeline enters the cavity, the sliding blocks are pushed to move forward, the diameter of the space maintained by the sliding blocks gradually increases in the process of moving forward of the sliding blocks, until it is slightly larger than the pipeline diameter, at this time, the pipeline can pass through the sliding blocks to continue to move forward. Since the pipeline is continuous, the sliding blocks are always in friction with the pipeline, and the pipeline is prevented from sliding backward at any time. However, the pipeline cannot slide backward, and if the pipeline slides backward, the sliding blocks will be extruded, but the grooves below the sliding blocks are shallower, and after the pipeline occupies the cavity space, the sliding blocks cannot slide backward, and the pipeline cannot slide downward.

[0125] The pipe trench is provided with:

[0126] The winch 7A has a steel wire rope 7A-1 connected with the traction head.

[0127] As a preferred embodiment of the present application, the reciprocating platform 2A comprises a moving platform 2A-5, a lead screw 2A-1 passing through the moving platform 2A-5 at the center, and a limiting rod 2A-2 passing through the moving platform 2A-5 and arranged on both sides of the lead screw 2A-1, the lead screw 2A-1 drives the moving platform 2A-5 to move reciprocally by a motor, and the moving platform 2A-5 is provided with a pipeline holder 2A-4 and a baffle 2A-3 located at the rear side of the pipeline holder 2A-4. The baffle 2A-3 is used to prevent the pipeline from sliding downward and to push the pipeline forward. The limiting rod 2A-2 can avoid lateral deviation caused by bumps during transportation.

[0128] It should be noted that, referring to FIGS. 8-10, the pipeline holder 6A-4 is composed of two semicircular arcs. In fact, in the specific implementation, the pulling stage is not continuous pulling, and the processing process moves about one section of the pipeline each time, so the falling probability is relatively low.

[0129] As a preferred embodiment of the present application, referring to FIG. 11, a limiting platform 8A can be additionally arranged behind the jointing platform 5A, the limiting platform 8A comprises a support 8A-1 and a locking device 8A-2, the locking device 8A-2 has a sleeve 8A-3 that can allow the pipeline to pass through and a tightening member 8A-4 that clamps the sleeve 8A-3.

[0130] The pipeline lowering assembly line provided by the present application integrates various devices required for pipeline laying, thereby reducing the occupation of the construction site. The above advantages are more significant in rugged mountainous areas, on the one hand, the mechanical equipment workload can be reduced, and the construction efficiency can be improved, on the other hand, the integrated assembly line has stronger adaptability to the site, and can work in more complex construction sites.

[0131] The pipeline lowering construction method in mountainous areas is as follows:

[0132] S01) excavating a pipeline trench, and arranging the laying device 1A from the low slope to the high slope in the pipeline trench;

[0133] It should be noted that the site can be leveled before the pipeline trench is excavated, but leveling the site does not mean leveling the site, but only means developing a topography that can place the production line and the pipeline, which can be inclined or flat, and the specific implementation can be determined according to the actual construction site.

[0134] S02) resetting the reciprocating platform 2A at the initial position, placing the pipeline unit in the pipeline holder 2A-4, and starting the motor of the lead screw 2A-1 to send the first pipeline into the welding platform 3A.

[0135] In the specific implementation, the pipelines are stored on one side of the reciprocating platform 2A, and one pipeline is placed on the pipeline holder 6A-4 each time the pipeline is lowered. In the present application, the initial position of the reciprocating platform 2A is the storage place of the pipelines.

[0136] S03) When the first pipeline enters the welding platform 3A, a traction head is welded at the front end of the pipeline, and the steel wire rope 7A-1 is fixedly connected with the traction head.

[0137] In the specific implementation, the distance of the reciprocating platform 2A and the distance of the welding platform 3A are determined according to the length of the pipeline. The welding platform 3A, which is matched with the length of the pipeline, is matched with the length of the pipeline, and the welding platform 3A includes a connecting unit and a welding unit. The connecting unit is used to align the head and tail of two continuous pipelines, and is used for welding accessories for the pipeline and the head and tail of the two continuous pipelines. The accessories include a traction head arranged at the front end of the first pipeline. The traction head is a component that can be connected with a traction device. As an example, it can be a ring, and the steel wire rope 7A-1 passes through the ring to form a reliable connection. Before welding, the center line of the pipeline needs to be aligned by using the connecting unit first, and then welding is performed. The connecting unit is a prior art, and a pipe aligning device can be used. The reciprocating platform 2A needs to be adjusted in height during installation to ensure that it is parallel to the uphill direction and the pipeline laying height, so that the height of the pipeline laid on the laying device 1A is basically consistent, and the use of the aligning device for fine adjustment at the connecting unit can align the head and tail of the two pipelines. The welding unit can use manual arc welding or can select automatic welding equipment. In the specific operation, the selection of the automatic welding machine and the welding material is selected according to the pipe diameter, wall thickness and pipeline material. The automatic welding machine is arranged at a fixed position to automatically complete the entire welding process, including welding parameter adjustment, welding gun movement, etc. When the pipeline moves to the welding unit, the worker can assist in position adjustment or movement.

[0138] S04) Start the hoist 7A, and pull the traction head of the first pipeline to the flaw detection platform 4A for welding quality detection. At the same time, the reciprocating platform 2A returns to the initial position to load the second pipeline, and moves the second pipeline to the welding platform 3A, so that the front end of the second pipeline is aligned with the rear end of the first pipeline along the center axis and is welded and connected by the welding unit.

[0139] The distance between the flaw detection platform 4A and the welding platform 3A is matched with the length of the pipeline, and the flaw detection platform 4A is used to detect the welding quality of the welding joint of the head and tail of the pipeline. As an example but not limited to, the application selects conventional ultrasonic detection, which is faster and more efficient.

[0140] S05) Start the hoist 7A, and pull the front end of the first pipeline into the joint repairing platform 5A. At the same time, the front end of the second pipeline enters the flaw detection platform 4A for welding quality detection. At the same time, the reciprocating platform 2A returns to the initial position to load the third pipeline and moves it to the welding platform 3A. The rear end of the second pipeline is welded and connected with the front end of the third pipeline by the welding unit at the welding platform 3A.

[0141] The splicing platform 5A is used for winding anticorrosive material at the head and tail of the pipeline. The splicing platform 5A can select a general winding machine, and the pipeline construction usually adopts the method of winding a heat-shrinkable sleeve or a cold-wound anticorrosive tape. When the front end of the first pipeline reaches the splicing platform 5A, no splicing is needed.

[0142] S06) Continue to pull the first pipeline, when the front end of the fourth pipeline is aligned with the rear end of the third pipeline, fasten the tightening member 8A-4; when the welding of the front end of the fourth pipeline and the rear end of the third pipeline is completed, loosen the tightening member 8A-4 and continue to pull the first pipeline to make the first pipeline pass through the tightening member 8A-4 and be connected with the first pipeline support 2A-4 of the pipe outlet processing area. At this time, the rear end of the first pipeline and the front end of the second pipeline are located at the splicing platform 5A, and the anticorrosive material is wound for splicing.

[0143] The tightening member 8A-4 is a component of the limiting platform 8A, and the limiting platform 8A includes a support 8A-1 and a locking device 8A-2, wherein the locking device 8A-2 has a sleeve 8A-3 capable of allowing the pipeline to pass through and a tightening member 8A-4 clamping the sleeve 8A-3. The sleeve 8A-3 is composed of two semicircular arcs, and the opening of the sleeve 8A-3 is reduced by applying pressure to the sleeve 8A-3 through the tightening member 8A-4 to achieve fixation.

[0144] The lifting process of the mountain construction should be vigilant about the pipeline falling off at all times. The present application forms a triple anti-sliding structure through the steel wire rope 7A-1, the one-way locking mechanism 6A-6 in the pipe support 6A-4 and the tightening member 8A-4, which can effectively prevent the pipeline from falling off from the whole and the part. Specifically, the steel wire rope 7A-1 forms a whole traction from the first pipeline, which is a bottom-up measure to prevent the pipeline from falling off. The one-way locking mechanism 6A-6 is arranged to allow the pipeline to pass through the cavity 6A-5 in one direction only. When the pipeline breaks and falls off during the traction process, the front pipeline is still pulled by the steel wire rope 7A-1, while the rear pipeline is blocked by a large number of one-way locking mechanisms 6A-6. The one-way locking mechanism 6A-6 of each cavity 6A-5 can form a continuous blocking effect to prevent the pipeline from falling off.

[0145] S07) According to steps S04) to S06), each pipeline is processed in turn, and the process controls the start or stop of the pipeline and the winch 7A to match the pipeline connection progress with the traction distance.

[0146] It should be noted that, since the pipeline welding occupies a relatively long time and the flaw detection and splicing time is relatively short, the positions of the flaw detection platform and the splicing platform in the plain construction and the mountain construction can be integrated together.

[0147] The pipeline in the application directly completes the whole process of pipeline processing in the pipe trench, breaks the original construction mode by using the pipeline thinking innovation, and reconstructs the construction process. The technical scheme of the application can obviously reduce the land occupation of mountain construction. The application fully utilizes the internal space of the excavated pipe trench, and can significantly reduce the reserved construction space on both sides of the pipe trench excavation. After reducing the construction space, the mountain requisition area is greatly reduced, and the operation cleaning time is shortened, and the risk in the construction process is significantly reduced.

[0148] The application integrates each device required for pipeline laying, thereby reducing the construction site occupation. The above advantages are more significant in rugged mountainous areas. On the one hand, the mechanical equipment workload can be reduced, and the construction efficiency can be improved. On the other hand, the intensive pipeline is more adaptable to the site, and can work in more complex construction sites.

[0149] The application has generalizability. In mountainous areas, for construction projects that do not need to excavate a pipe trench, the application is still applicable. Specifically, the support column 6A-1 of the application can be directly fixed on the surface of the mountain, and the pipeline support 2A-4 frame is a construction tool and also part of the engineering entity, thereby reducing the construction cost. It should be noted that whether the pipe trench needs to be excavated or not, the laying height of the pipeline should be measured in advance when the support column 6A-1 is arranged, and then the support column 6A-1 is installed according to the laying height. The laying height can be determined according to the embedding depth of the support column 6A-1. The pipeline is constructed by the pipeline of the application. This method can greatly improve the construction efficiency, greatly reduce the engineering investment, and also does not need a backfilling process, which can significantly reduce the damage to the ecological environment and the water and soil conservation cost in the later period. Similarly, the application is also applicable to plain areas.

[0150] In addition, the application is also applicable to metal pipelines and non-metal pipelines. Due to the process reason, the non-metal pipeline does not need to use a flaw detection platform and a joint repairing platform; the welding unit can be replaced by a connecting device suitable for non-metal pipes, such as a resin winding device or a hot melt connecting device.

[0151] The places not mentioned in the application can be realized by using or referring to the existing technology.

[0152] The above only describes the embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the scope of the claims of the application.

Claims

1. A pipeline laying pipeline, characterized in that, the pipeline is arranged at the front end of the trench excavation starting end, and a conveying device is arranged from the front end to the trench excavation starting end, the conveying device is sequentially connected from the front end to the starting end of the trench excavation, a pipeline rack is arranged on one side of the conveying device, the pipeline rack is used to store pipeline units and convey the pipeline units to the conveying device; a welding platform is arranged at a distance from the pipeline rack, the distance being equal to the length of the pipeline, the welding platform comprises a connecting unit and a welding unit, the connecting unit is used to align the heads and tails of two continuous pipelines, and is used to weld accessories for the pipelines and the joints between the heads and tails of the two continuous pipelines; the accessories comprise a pulling head arranged at the front end of the first section of pipeline; a flaw detection platform is arranged at a distance from the welding platform, the distance being equal to the length of the pipeline, the flaw detection platform is used to detect the welding quality of the heads and tails of the pipelines; a joint coating platform is used to wrap anticorrosive materials around the heads and tails of the pipelines; a limiting platform comprises a support and a locking device, the locking device has a sleeve that can accommodate the pipeline and a tightening member that clamps the sleeve; a trench support is fixed to the ground and extends obliquely into the trench, and the bottom of the trench support is provided with pulleys at several heights to support the pipeline; a puller comprises two hooks at the ends, the two hooks are connected by a basket screw and a spring, one end of the hook of the basket screw is connected to the pulling head, and one end of the hook of the spring is connected to the bottom of the excavator.

2. A method of pipeline installation using the pipelining method of claim 1, wherein, The method comprises the following steps: S01) leveling the site, arranging the pipelines in the pipeline rack along the direction of the trench; S02) the pipeline rack conveying the pipelines to the conveying device; S03) when the first pipeline enters the welding platform, a pulling head is welded at the front end of the pipeline, and at the same time, the second pipeline is conveyed to the conveying device; S04) the pulling head of the first pipeline enters the flaw detection platform for welding quality detection, at the same time, the front end of the second pipeline is aligned with the rear end of the first pipeline along the center axis and is welded and connected by the welding unit; S05) the rear end of the first pipeline enters the joint coating platform to wrap anticorrosive materials, at the same time, the rear end of the second pipeline enters the flaw detection platform for welding quality detection, at the same time, the rear end of the third pipeline is welded and connected with the front end of the fourth pipeline by the welding unit in the welding platform; S06) the tightening member is loosened to allow the first pipeline to sequentially pass through the tightening member and the pipeline support and then enter the trench; S07) the excavator enters the trench or straddles the two sides of the trench, and the pulling head is installed between the two tracks; S08) the puller is installed between the pulling head of the first pipeline and the pulling head of the excavator, the excavator continuously excavates the trench from the trench excavation starting end, and the pipeline connection progress is matched with the excavation distance by controlling the pipeline to start or stop according to the excavation distance. 3.The pipeline laying pipeline according to claim 2, characterized in that, in step S08), when there is a large amount of underground water in the trench, a float is installed on the pipeline lowered into the trench; when there is no underground water in the trench, a detachable pulley block is installed below the pipeline lowered into the trench. 4.The pipeline laying pipeline according to claim 2, characterized in that, the method further comprises: S09) When the pipeline is running to the end, adjust the basket screw at one end until the spring returns to the original length, and then remove the puller.

5. The pipeline laying method according to claim 4, wherein, In step S09), further, in step S09), when the pipeline is running to the end, there is a certain height difference between the end and the starting point. There is a certain difficulty in removing the connection between the puller and the pipeline pulling head. Part of the pipeline can be buried to ensure that the pipeline cannot be displaced. The connection between the puller and the pipeline pulling head is removed under the condition of ensuring safety to prevent accidental injury.

6. A pipeline laying assembly, comprising: The pipeline laying assembly is arranged in a completed trench in a mountainous area, and the pipeline laying assembly is arranged from a low slope to a high slope and is provided with a laying device, and the laying device is sequentially connected with: a reciprocating platform, which is used for conveying a pipeline unit by reciprocating movement; a welding platform, which is arranged at a distance from the reciprocating platform and has a length corresponding to the pipeline, and the welding platform comprises a connecting unit and a welding unit, the connecting unit is used for aligning the head and tail of two continuous pipelines, and is used for welding accessories for the pipeline and the joint between the head and tail of the two continuous pipelines; the accessories comprise a pulling head arranged at the front end of a first pipeline section; a flaw detection platform, which is arranged at a distance from the welding platform and has a length corresponding to the pipeline, and the flaw detection platform is used for detecting the welding quality of the head and tail of the pipeline; a joint repairing platform, which is used for winding anticorrosive material around the head and tail of the pipeline; The pipeline laying assembly is provided with a pipeline bracket in the interval between the reciprocating platform, the welding platform, the flaw detection platform and the joint repairing platform and inside the pipeline trench in which the laying device is arranged, and the pipeline bracket comprises a support column embedded in the pipeline trench and a bracket platform fixedly connected with the support column, and the bracket platform is sequentially provided with a conveying roller and a pipeline support in the direction of pipeline movement, and the pipeline support has a cylindrical cavity, and the inner wall of the cavity is provided with a one-way locking mechanism allowing only the pipeline unit to pass in one direction; The pipeline trench is provided with: a winch having a steel wire rope connected with the pulling head.

7. The pipeline laying assembly according to claim 6, wherein: the reciprocating platform comprises a moving platform, a lead screw penetrating through the moving platform in the center and a limiting rod penetrating through the moving platform and arranged on both sides of the lead screw, the lead screw drives the moving platform to reciprocate by a motor, and the moving platform is provided with a pipeline support and a baffle arranged at the rear side of the pipeline support; the joint repairing platform is further provided with a limiting platform, and the limiting platform comprises a support and a locking device, and the locking device has a sleeve allowing the pipeline to pass through and a tightening member clamping the sleeve. The pipeline laying assembly comprises the following steps:

8. A method of pipeline installation using the pipelining method of claim 7, wherein, S01) excavating a pipeline trench, and arranging a laying device in the pipeline trench from a low slope to a high slope; S02) resetting the reciprocating platform at an initial position, placing a pipeline unit in the pipeline support, starting a motor controlling the lead screw, and feeding a first pipeline into the welding platform; S03) when the first pipeline enters the welding platform, welding a pulling head at the front end of the pipeline, and fixing a steel wire rope with the pulling head; S04) when the first pipeline enters the flaw detection platform, detecting the welding quality of the head and tail of the pipeline; S05) when the first pipeline enters the joint repairing platform, winding anticorrosive material around the head and tail of the pipeline; S06) when the first pipeline enters the limiting platform, clamping the pipeline by the locking device of the limiting platform; S07) when the first pipeline enters the reciprocating platform, feeding the pipeline into the pipeline support by the reciprocating platform; S08) when the first pipeline enters the laying device, feeding the pipeline into the pipeline trench by the laying device; S09) when the pipeline is running to the end, adjusting the basket screw at one end until the spring returns to the original length, and then removing the puller. S04) Start the winch to pull the first pipeline to the detection platform for welding quality detection, at the same time, the reciprocating platform returns to the initial position to load the second pipeline and move the second pipeline to the welding platform, so that the front end of the second pipeline is aligned with the rear end of the first pipeline along the central axis and connected by the welding unit; S05) Start the winch to pull the rear end of the first pipeline into the joint repairing platform, at the same time, the rear end of the second pipeline enters the detection platform for welding quality detection, at the same time, the reciprocating platform returns to the initial position to load the fourth pipeline and move it to the welding platform, the rear end of the third pipeline is connected with the front end of the fourth pipeline by the welding unit at the welding platform; S06) Continue to pull the first pipeline, when the front end of the fourth pipeline is aligned with the rear end of the third pipeline, tighten the fastening member, when the front end of the fourth pipeline is welded with the rear end of the third pipeline, loosen the fastening member and continue to pull the first pipeline to make the first pipeline pass through the fastening member and connect with the first pipeline bracket; S07) According to steps S04) to S06), each pipeline is processed in turn, and the pipeline connection progress is matched with the pulling distance by controlling the start or stop of the winch and the pipeline according to the pipeline processing progress.

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