Method and system for transporting pipelines in narrow public pipe gallery

Abstract

The invention relates to the technical field of pipeline transportation, in particular to a method and system for transporting pipelines in a narrow public pipe gallery. The transportation method comprises the steps that S1, a pipeline is placed on the wheel type transportation vehicle; s2, carrying out traction transportation by a tractor; s3, a transportation system is converted; s4, the winch continues to drag the trolley to walk along the rail until the pipeline is conveyed to the installation position at the front end of the rail, and butt joint of the pipeline and the installed pipeline is completed; according to the method for transporting the pipelines in the narrow public pipe gallery, the marine transportation and hoisting mode is converted into land transportation and installation, large ship machine equipment is abandoned, the use cost of ship machines is reduced, and the method has the beneficial effects that construction operation is easy, the failure rate is low, and the pipelines do not slide relative to the wheel type transport vehicle and the trolley in the transportation process; damage to the surface of a pipeline paint film is small, and the construction efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline transportation, in particular to a pipeline transportation method and system in a narrow public pipe gallery. BACKGROUND

[0002] In the construction of existing crude oil wharfs, especially in the construction of long-distance oil pipeline with high-pile beam plate structure, self-propelled flat barge combined with large crawler cranes are usually used for pipeline transportation and installation. Affected by weather, sea conditions and other natural conditions, under the condition of strong wind and wave or unpredictable weather, the lifting operation has high safety risk, which is easy to cause equipment damage, personnel injury or project delay. Moreover, such operation depends on large transportation and lifting equipment, which not only has high rental and operation cost, but also puts forward higher requirements for construction organization and coordination, thereby reducing the overall construction efficiency.

[0003] In addition, in the high-pile beam plate structure, multiple pipelines are usually integrated and arranged on the public pipe gallery, and the lifting space is limited, so the construction operation difficulty is greatly improved. Any improper operation may cause damage to the installed pipeline or the structure of the public pipe gallery, so additional product protection measures need to be taken, which further increases the construction cost and cycle. SUMMARY

[0004] In order to solve one of the problems existing in the prior art, the present application provides a pipeline transportation method and system in a narrow public pipe gallery, which changes the mode of offshore transportation and lifting to onshore transportation and installation, and has low construction risk.

[0005] In one aspect, the present application provides a pipeline transportation method in a narrow public pipe gallery, comprising the following steps: S1, placing the pipeline on a wheeled transport vehicle; placing the two ends of the pipeline on two wheeled transport vehicles in turn; S2, towing by a tractor; connecting the wheeled transport vehicle at the front end of the pipeline with the tractor, and driving the wheeled transport vehicle to walk along the side of the public pipe gallery by the tractor, when walking to the pipeline installation area near the public pipe gallery, the tractor pulls obliquely, and the front end of the pipeline is pulled to the rear end position of the track in the pipeline installation area; S3, converting the transportation system; disconnecting the connection between the tractor and the wheeled transport vehicle at the front end, placing the front end of the pipeline on the trolley at the rear end of the track, separating the wheeled transport vehicle at the front end of the pipeline from the pipeline, and driving the trolley to walk on the track by the traction winch, the trolley and the wheeled transport vehicle at the rear end of the pipeline jointly transport the pipeline; When the trolley runs along the track for a distance, the rear wheel truck at the rear end is separated from the pipeline, and another trolley is placed at the rear end of the track for carrying the rear end of the pipeline; S4, the winch continues to pull the trolley to walk along the track until the pipeline is transported to the installation position at the front end of the track, and the pipeline is connected with the installed pipeline.

[0006] The pipeline transportation method in the narrow public pipe gallery of the technical solution changes the marine transportation and hoisting mode into land transportation and installation, discards the use of large ship machines and equipment, has simple construction operation, low failure rate, no relative sliding between the pipeline and the wheel truck and the trolley during transportation, small damage to the pipeline paint film surface, and improves the construction efficiency and quality.

[0007] In some embodiments of the present application, in step S2, when the tractor pulls obliquely, the front end and the rear end of the pipeline can be adjusted in angle by the two wheel trucks, so that the front end of the pipeline moves from the side of the public pipe gallery to the rear end of the track, and the pipeline keeps a distance from the pipe gallery frame and the installed pipeline to avoid scratching and damaging the pipeline surface paint film.

[0008] In some embodiments of the present application, in step S3, when the front end of the pipeline is placed on the trolley, the wheel truck at the rear end of the track is on the track passage, the wheel truck is pushed to move laterally, the axis position of the pipeline is adjusted to be parallel to the track, the traction winch pulls the trolley to move, the wheel truck follows, and the trolley and the wheel truck cooperate to transport the pipeline together.

[0009] In some embodiments of the present application, in step S3, when the wheel truck at the rear end of the pipeline moves to the rear end of the track, the wheel truck is separated from the pipeline, another trolley is placed at the rear end of the track, and the two trolleys are used to carry the pipeline and continue to walk on the track under the driving of the traction winch.

[0010] In some embodiments of the present application, the tractor is a forklift; In step S1, the forklift is used to lift the two ends of the pipeline and place them on the pipe support, and then in step S2, the forklift is connected with the wheel truck at the front end to pull and transport the pipeline; In step S3, after disconnecting the forklift from the wheel truck, the forklift places the front end of the pipeline on the trolley; only one forklift is used to realize the transfer of the pipeline and the traction of the wheel truck, without the need for large hoisting equipment, and the equipment utilization rate is higher, reducing the equipment use cost.

[0011] In another aspect, the present application also provides a pipeline transportation system in a narrow public pipe gallery, comprising a wheeled transportation system and a rail trolley transportation system, The wheeled transportation system comprises: Two wheeled transportation vehicles are arranged at both ends of the pipeline to carry the pipeline; A towing vehicle is connected to the wheeled transportation vehicle at the front end of the pipeline to tow the wheeled transportation vehicle to move along one side of the public pipe gallery; The rail trolley transportation system comprises: A rail is arranged in the pipeline installation area in the public pipe gallery and is arranged in line with the installed pipeline; Two trolleys are arranged on the rail and located at both ends of the pipeline to carry the pipeline to move on the rail; A traction winch is arranged at the front end of the rail to tow the trolley at the front end of the pipeline; First, the wheeled transportation system is used to transport the pipeline to the rear end of the rail, and then the front end and the rear end of the pipeline are sequentially transferred to the two trolleys, and the traction winch tows the trolley to move on the rail to transport the pipeline to the installation position.

[0012] In some embodiments of the present application, the wheeled transportation vehicle comprises a chassis, load-bearing wheels symmetrically arranged at both ends of the chassis, a pipe holder arranged on the chassis for containing the pipeline, and a universal assembly arranged between the chassis and the pipe holder for adjusting the posture of the pipeline during transportation. The universal assembly comprises: A fixed ring is fixed on the chassis; A rotating ring is located above the fixed ring and is rotatably connected to the fixed ring, and the pipe holder is fixed above the rotating ring so that the pipe holder rotates relative to the chassis; By adjusting the pipe holder, the rotating ring rotates relative to the fixed ring, and the front end and the rear end of the pipeline rotate relative to the chassis to adjust the posture of the pipeline.

[0013] In some embodiments of the present application, one end of the chassis is provided with a towing frame, the towing vehicle is provided with a towing rod, and the towing frame and the towing rod are connected and fixed by a pin shaft; The towing frame of the wheeled transportation vehicle at the front end of the pipeline is connected to the towing vehicle through the pin shaft, and the towing vehicle tows the wheeled transportation vehicle to move forward; The pin shaft is removed, and the towing vehicle is disconnected from the wheeled transportation vehicle.

[0014] In some embodiments of the present application, the pipe support is a concave circular arc plate, the pipe is located at the bottom of the pipe support, and the two sides of the pipe support can avoid rolling of the pipe during transportation; The bottom of the pipe support is uniformly provided with a plurality of vertical support rods, the other end of the support rod is fixed on the rotating ring, the weight of the pipe support can be uniformly dispersed, and the carrying capacity of the pipe support is improved.

[0015] In some embodiments of the present application, the load bearing wheel is a solid rubber tire, which has large carrying capacity and can avoid the situation of tire being crushed or burst during repeated heavy load transportation or steering.

[0016] Based on the above technical scheme, the narrow public pipe gallery pipeline transportation method of the present application changes the sea transportation and hoisting mode into land transportation and installation, discards the use of large ship machine equipment, reduces the ship machine use cost, has simple construction operation, low failure rate, no relative sliding between the pipeline and the wheeled transport vehicle and the trolley during transportation, small destructive effect on the pipeline paint film surface, and improves the construction efficiency and quality; The track trolley is arranged in the public pipe gallery, the track is collinear with the installed pipeline, the hoist is used for traction, the large-diameter crude oil pipeline is realized in the narrow public pipe gallery, the collision rate of the public pipe gallery frame on the laid pipeline and pipeline is greatly reduced, the construction safety risk is effectively reduced, and the installation quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a structural schematic diagram of the wheeled transportation system of the embodiment of the present application; Figure 2 It is a top view of the wheeled transport vehicle of the embodiment of the present application; Figure 3 It is a left view of the wheeled transport vehicle of the embodiment of the present application; Figure 4 It is a structural schematic diagram of the track trolley transportation system of the embodiment of the present application; Figure 5 It is a schematic diagram of the wheeled transportation system of the embodiment of the present application driving the pipeline to walk in the driving passage; Figure 6 It is a schematic diagram of the first wheeled transport vehicle of the embodiment of the present application walking to the rear end of the track; Figure 7 It is a schematic diagram of the second wheeled transport vehicle of the embodiment of the present application moving horizontally in the public pipe gallery; Figure 8Fig. 2 is a schematic view of a pipe being transported by the trolley and the second wheeled transport vehicle according to an embodiment of the present application; Figure 9 Fig. 3 is a schematic view of a pipe being transported by the track trolley transport system according to an embodiment of the present application.

[0018] Fig. 1 is a schematic view of a pipe being transported by the trolley and the second wheeled transport vehicle according to an embodiment of the present application. Fig. 2 is a schematic view of a pipe being transported by the trolley and the second wheeled transport vehicle according to an embodiment of the present application. Fig. 3 is a schematic view of a pipe being transported by the track trolley transport system according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms “center”, “transverse”, “longitudinal”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] The terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first”, “second”, “third” can explicitly or implicitly include one or more of the features.

[0022] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] The embodiment provides a pipeline transportation system in a narrow public pipe gallery, which comprises a wheeled transportation system and a rail trolley transportation system; when the pipeline is transported, the wheeled transportation system is used to transport the pipeline to a pipeline installation area, then the transportation system is converted, the pipeline is transferred to the rail trolley transportation system, and the rail trolley transportation system transports the pipeline to an installation position and is connected and fixed with an installed pipeline. The pipeline transportation and installation mode of the original self-propelled flat barge combined with a large crawler crane is abandoned, and the pipeline is transported and installed on land, so that the equipment use cost is reduced.

[0024] As shown in Figures 1-3 , the wheeled transportation system comprises: The wheeled transportation vehicle is provided at two ends of the pipeline 10 and is used for carrying the pipeline 10; in the embodiment, the first wheeled transportation vehicle 20 is located at the front end of the pipeline, and the second wheeled transportation vehicle 30 is located at the rear end of the pipeline; The towing vehicle 40 is connected with the first wheeled transportation vehicle 20 located at the front end of the pipeline 10, the towing vehicle 40 drags the first wheeled transportation vehicle 20 to move, drives the pipeline 10 and the second wheeled transportation vehicle 30 to move at the same time, and in the embodiment, the towing vehicle 40 drags the pipeline 10 to move on one side of the public pipe gallery; Taking the first wheeled transportation vehicle 20 as an example, the structure of the wheeled transportation vehicle is described in detail, as shown in Figures 2-3 , the wheeled transportation vehicle comprises a chassis 21 and an axle 22 penetrating through the chassis 21, the axle 22 is fixed with a load-bearing wheel 23 at two ends, the load-bearing wheel 23 is a solid rubber tire, has large carrying capacity, and can avoid the situation that the tire is crushed or bursts when repeatedly carrying heavy loads or turning; The chassis 21 is a rectangular frame structure, the front end of the chassis 21 is provided with a towing frame 24, the towing frame 24 is a triangular frame structure, the towing frame 24 is connected with the chassis 21 through a rotating pin shaft, the towing vehicle 40 is provided with a towing rod 41, the front end of the towing frame 24 is provided with a movable pin shaft 241, and the towing frame 24 and the towing rod 41 are connected and fixed through the movable pin shaft 241.

[0025] A pipe holder 25 for containing the pipeline 10 is arranged on the chassis 21, and a universal assembly 26 is arranged between the chassis 21 and the pipe holder 25, the universal assembly 26 is used for adjusting the posture of the pipeline 10 in the transportation process, the change of the posture of the pipeline 10 refers to that the front end or the rear end of the pipeline rotates relative to the chassis 21 in the transportation process, the pipeline 10 itself does not rotate or displace relative to the pipe holder 25, and damage to the paint film surface of the pipeline 10 is avoided.

[0026] Specifically, the universal assembly 26 comprises: A fixed ring 262 is welded and fixed on the chassis 21; The rotating ring 261 is located above the fixed ring 262 and is rotatably connected with the fixed ring 262. The fixed ring 262 and the rotating ring 261 are provided with rotating balls (not shown in the figure), so that the rotating ring 261 can rotate 360° around the fixed ring 262. The upper side of the rotating ring 261 is fixed with the pipe support 25, so that the pipe support 25 rotates relative to the base plate 21 within the range of 0-360°. The pipe support 25 of the embodiment is a concave circular arc plate. The pipe 10 is located at the bottom of the circular arc of the pipe support 25, and the two sides of the circular arc can avoid the pipe 10 from rolling during transportation. The bottom of the pipe support 25 is uniformly provided with a plurality of vertical support rods 251. The other end of the support rod 251 is fixed on the rotating ring 261. The support rod 251 can uniformly disperse the weight of the pipe 10 supported by the pipe support 25 to the rotating ring 261. Since the lower side of the rotating ring 261 is the fixed ring 262, and the lower side of the fixed ring 262 is the base plate 21, the weight of the pipe 10 is ultimately borne by the base plate 21. The rectangular frame structure of the base plate 21 increases the contact area with the fixed ring 262, thereby increasing the carrying capacity and stability of the whole device.

[0027] As shown in Figure 4 , the rail trolley transportation system comprises, a rail 50, which is arranged in the pipe installation area in the public pipe gallery and is arranged in line with the installed pipe; trolleys 60, two of which are arranged on the rail 50 and are located at the two ends of the pipe 10, and are used to carry the pipe 10 to move on the rail 50; a traction winch 70, which is arranged at the front end of the rail 50 and pulls the trolley 60 located at the front end of the pipe 10; First, use the wheeled transportation system to transport the pipe 10 to the rear end close to the rail 50 at the front end, and then transfer the front end and the rear end of the pipe 10 to the two trolleys 60 in sequence. The traction winch 70 pulls the trolleys to move on the rail 50 to transport the pipe to the installation position at the front end of the rail 50.

[0028] The above narrow public pipe gallery pipe transportation system is used for the installation of pipes in the public pipe gallery 80 of the crude oil wharf. The length of the pipe 10 is 12 m, the width D1 of the public pipe gallery 80 is 6 m, the distance L between the two columns 81 of the public pipe gallery 80 is 8 m, and the width D2 of the walking path 90 beside the public pipe gallery 80 is 4 m. The width of the walking path 90 is small, and conventional hoisting tools such as car hoists cannot pass through. The distance between the two load-bearing wheels 23 of the wheeled transportation vehicle of the embodiment is 1.38 m, which can walk in the walking path 90. There are installed pipes in the public pipe gallery 80, which occupy the internal space, so that the installation space in the public pipe gallery 80 is even narrower. Therefore, the above pipe transportation system is used to transport the pipe. The pipe 10 has been treated by rust removal and corrosion prevention. The transportation method specifically includes the following steps: The front end of the pipeline 10 is lifted by the forklift and placed on the pipe support 25 of the first wheeled transport vehicle 20, and the rear end of the pipeline 10 is lifted by the forklift and placed on the pipe support of the second wheeled transport vehicle 30; The forklift is used as the towing vehicle 40, the rear end of the forklift is connected to the towing frame 24 of the first wheeled transport vehicle 20 through the movable pin shaft 241, the forklift drives the first wheeled transport vehicle 20 to move forward, and drives the pipeline 10 and the second wheeled transport vehicle 30 to move in the travel path 90 on one side of the public pipeline gallery 80, as shown in Figure 5 , When the forklift moves to the rear end of the track 50, the forklift is inclined to the inside of the public pipeline gallery 80 from the travel path 90, and the front end of the pipeline 10 is pulled to the rear end of the track 50, as shown in Figure 6 During the movement of the forklift to the rear end of the track 50, the pipe support 25 of the first wheeled transport vehicle 20 drives the front end of the pipeline 10 to rotate relative to the chassis 21, and the pipe support of the second wheeled transport vehicle 30 drives the rear end of the pipeline 10 to rotate relative to the chassis, so as to adjust the posture of the pipeline 10, so that the pipeline 10 is kept away from the installed pipeline in the public pipeline gallery or the column, and the scratch is avoided.

[0029] Due to the large weight of the pipeline 10 and the setting of the universal assembly 26 on the chassis 21, when the forklift starts to turn, the pipeline 10 still maintains the form during the movement in the travel path 90, that is, the pipeline 10 is parallel to the length direction of the travel path 90, and as the forklift gradually moves to the direction of the track 50, manual assistance is needed to adjust the posture of the pipeline 10 by adjusting the pipe support 25 of the first wheeled transport vehicle 20 and the pipe support of the second wheeled transport vehicle 30, so as to avoid the scratch with the installed pipeline in the public pipeline gallery or the column.

[0030] When the front end of the pipeline 10 is pulled to the rear end of the track 50, the movable pin shaft 241 is removed, the connection between the forklift and the first wheeled transport vehicle 20 is disconnected, and the forklift lifts the front end of the pipeline 10 from the pipe support 25 of the first wheeled transport vehicle 20 and places it on the trolley 60 at the rear end of the track 50; At this time, the second wheeled transport vehicle 30 is located outside the public pipeline gallery, and the second wheeled transport vehicle 30 is pushed to move horizontally, as shown in Figure 7 When the second wheeled transport vehicle 30 moves horizontally, due to the existence of the universal assembly and the large weight of the pipeline 10, the pipe support will rotate relative to the chassis, so that the axis of the pipeline 10 gradually becomes parallel to the track 50, and the trolley 60 moves a small distance forward on the track, at this time, the second wheeled transport vehicle 30 is located on the extension line of the track 50, as shown in Figure 8As shown, the traction winch 70 at the front end of the track 50 pulls the trolley 60 in front of the pipeline 10 on the track 50 through the traction rope, at this time, the trolley 60 cooperates with the second wheeled transport vehicle 30 at the rear end of the pipeline 10 to transport the pipeline, as shown in Figure 8 As shown in the figure; When the second wheeled transport vehicle 30 moves a distance to the track 50, most of the pipeline 10 is located on the track 50, when the height of the track 50 is higher than the height of the pipe support, the rear end of the pipeline 10 is lifted from the pipe support, at this time, the traction winch 70 stops traction, and another trolley 60 is placed on the track 50, so that the rear end of the pipeline 10 is supported on the trolley 60, as shown in Figure 9 As shown in the figure; The traction winch 70 continues to pull the front trolley 60 along the track 50 until the pipeline 10 is transported to the installation position at the front end of the track 50, and the pipeline is connected with the installed pipeline.

[0031] Based on the above technical scheme, the pipeline transportation method in the narrow public pipe gallery of the application changes the marine transportation and hoisting mode to land transportation and installation, discards the use of large ship machines, reduces the use cost of ship machines, has simple construction operation, low failure rate, no relative sliding between the pipeline and the wheeled transport vehicle and the trolley during transportation, small damage to the pipeline paint film surface, and improves the construction efficiency and quality; Only one forklift is used to realize the transfer of the pipeline and the traction of the wheeled transport vehicle, without the need for large hoisting equipment, and the equipment utilization rate is high, thereby reducing the equipment use cost; The track trolley is arranged in the public pipe gallery, the track is collinear with the installed pipeline, the traction winch is used for traction, the large-diameter crude oil pipeline is installed in the narrow public pipe gallery, the collision rate of the pipeline and the pipeline on the public pipe gallery frame is greatly reduced, the construction safety risk is effectively reduced, and the installation quality is improved.

[0032] Finally, it should be noted that: the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to.

[0033] The above embodiments are only used to illustrate the technical solutions of the application and not to limit them; although the application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the application can be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical scheme of the application, they should be covered in the technical scheme range of the application claimed by the application.

Claims

1. A method for transporting pipelines in a narrow public utility tunnel, characterized in that, Comprising the following steps: S1, the pipeline is placed on the wheeled transport vehicle; The two ends of the pipeline are placed on the two wheeled transport vehicles in turn; S2, the tractor pulls the transport; The wheeled transport vehicle at the front end of the pipeline is connected with the tractor, and the tractor drives the wheeled transport vehicle to walk on the driving channel on one side of the public pipeline gallery. When walking to the pipeline installation area in the public pipeline gallery, the tractor pulls obliquely, and the front end of the pipeline is pulled into the rear end position of the track in the pipeline installation area. S3, the transport system is converted; Disconnect the connection between the tractor and the wheeled transport vehicle at the front end, place the front end of the pipeline on the trolley at the rear end of the track, separate the wheeled transport vehicle at the front end of the pipeline from the pipeline, and pull the hoist to drive the trolley to walk on the track. The trolley and the wheeled transport vehicle at the rear end of the pipeline jointly transport the pipeline. When the trolley runs a distance along the track, the wheeled transport vehicle at the rear end is located at the rear end of the track, the wheeled transport vehicle at the rear end is separated from the pipeline, and another trolley is placed at the rear end of the track for carrying the rear end of the pipeline. S4, the hoist continues to drive the trolley to walk along the track until the pipeline is transported to the installation position at the front end of the track, and the pipeline is connected with the installed pipeline.

2. The method of claim 1, wherein, In step S2, when the tractor pulls obliquely, the front end and the rear end of the pipeline can be adjusted in the axial position by the two wheeled transport vehicles, so that the front end of the pipeline moves from the side of the public pipeline gallery to the rear end of the track during the movement, and the pipeline keeps a distance from the pipeline frame and the installed pipeline.

3. The method of claim 2, wherein, In step S3, when the front end of the pipeline is placed on the trolley, the wheeled transport vehicle at the rear end of the track is on the driving channel, the wheeled transport vehicle is pushed to move laterally, the axial position of the pipeline is adjusted to be parallel to the track, the trolley is pulled by the traction hoist, the wheeled transport vehicle follows, and the trolley and the wheeled transport vehicle cooperate to jointly transport the pipeline.

4. The method of claim 3, wherein, In step S3, when the wheeled transport vehicle at the rear end of the pipeline moves to the rear end of the track, the wheeled transport vehicle is separated from the pipeline, and another trolley is placed at the rear end of the track. Two trolleys are used to carry the pipeline and continue to walk on the track under the drive of the traction hoist.

5. The method of claim 1, wherein, The tractor is a forklift; In step S1, the forklift is used to lift the two ends of the pipeline and place them on the wheeled transport vehicle, and then in step S2, the forklift is connected with the wheeled transport vehicle at the front end to pull the pipeline. In step S3, after disconnecting the connection between the forklift and the wheeled transport vehicle, the forklift places the front end of the pipeline on the trolley.

6. A narrow public conduit in-pipe transportation system for use in the transportation method of any one of claims 1-5, characterized in that, The wheeled transport system and the track trolley transport system, The wheeled transport system comprises: The wheeled transport vehicle has two, which are arranged at the two ends of the pipeline and are used to carry the pipeline; The tractor is connected with the wheeled transport vehicle at the front end of the pipeline, and drives the wheeled transport vehicle to move on one side of the public pipeline gallery. The track trolley transportation system comprises: a track arranged in a pipeline installation area in a public pipeline gallery and arranged in line with an installed pipeline; two trolleys arranged on the track and located at two ends of the pipeline to carry the pipeline to move on the track; a traction winch arranged at a front end of the track to pull the trolley located at a front end of the pipeline; firstly, the pipeline is transported to the rear end of the track close to the front end by using a wheeled transportation system, and then the front end and the rear end of the pipeline are sequentially transferred to the two trolleys, and the traction winch pulls the trolleys to move on the track to transport the pipeline to an installation position.

7. The transport system of claim 6, wherein, The wheeled transportation vehicle comprises a chassis, load-bearing wheels symmetrically arranged at two ends of the chassis, a pipe support arranged on the chassis to hold the pipeline, and a universal assembly arranged between the chassis and the pipe support, the universal assembly being used to adjust the posture of the pipeline during transportation, the universal assembly comprising: a fixed ring fixed on the chassis; a rotating ring located above the fixed ring and rotatably connected with the fixed ring, the pipe support being fixed above the rotating ring so that the pipe support rotates relative to the chassis; by adjusting the pipe support, the rotating ring rotates relative to the fixed ring, the front end and the rear end of the pipeline rotate around the chassis, and the posture of the pipeline is adjusted.

8. The transport system of claim 7, wherein, One end of the chassis is provided with a traction frame, the traction vehicle is provided with a traction rod, and the traction frame and the traction rod are fixed by a pin shaft; the traction frame of the wheeled transportation vehicle located at the front end of the pipeline is connected with the traction vehicle through the pin shaft, and the traction vehicle pulls the wheeled transportation device to move forward; the pin shaft is pulled out, and the traction vehicle is disconnected from the wheeled transportation vehicle.

9. The transport system of claim 7, wherein, The pipe support is a concave circular arc plate, the pipeline is located at the bottom of the pipe support, and the two sides of the pipe support can avoid rolling during pipeline transportation; a plurality of vertical support rods are uniformly arranged at the bottom of the pipe support, the other end of the support rod is fixed on the rotating ring, and the support rods can uniformly disperse the load-bearing weight of the pipe support.

10. The transport system of claim 7, wherein, The load-bearing wheel is a solid rubber tire.

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