Pipeline transportation trolley

Abstract

The utility model relates to the technical field of transportation of pipelines in subdrains, in particular to a pipeline transportation trolley, which mainly solves the technical problems that the transportation of the existing pipelines in the subdrains wastes time and labor, the pipelines are easy to damage and the applicability is poor. The pipeline transportation trolley comprises a walking wheel assembly; the bottoms of the supporting legs are rotationally connected to the corresponding walking wheel assemblies, and the rotating axes are arranged left and right; the length of the bracket in the front-back direction is smaller than the distance between the two sets of walking wheel assemblies. The two ends of the telescopic assembly are rotationally connected to the middles of the two supporting legs correspondingly, and the rotating axes are arranged left and right. According to the trolley, the distance between the two supporting legs can be adjusted through action of the telescopic assembly, so that height adjustment of the bracket is achieved, then the trolley can be in butt joint with embedded supports with different elevations after a pipeline is transported in place, and adaptability is higher; and moreover, manual stooping for pipe lifting is not needed, time and labor are saved, pipeline friction caused by dragging can be avoided, and therefore the pipeline can be prevented from being damaged in the transportation process.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline transportation in a dark ditch, in particular to a pipeline transportation trolley. Background Art

[0002] The trench cover is removed intermittently, that is, a certain length of working surface is excavated for laying pipes at regular intervals according to the length of the pipeline and the net depth of the trench. After laying the pipes, the pipelines are horizontally transported into place in the culvert, and finally the pipelines in the excavated area are laid.

[0003] The following methods are commonly used for horizontal transportation of existing pipelines in underground trenches in unexcavated areas: first, the method of manual lifting, that is, lowering the pipeline from the lower pipe working surface into the trench, and transporting the pipeline in the trench by manual lifting; second, the direct dragging method, that is, using ropes, chains and other tools to tie the pipeline, and the construction workers stand above the excavation surface in front of the trench, and use the ropes, chains and other tools to achieve horizontal movement of the pipeline in the trench; third, the method of simple transportation tools, that is, placing the pipeline on one or more simple small trailers in the trench from the lower pipe working surface, and using traction or thrust to move the pipeline in the trench.

[0004] For the method of transporting pipes by lifting them manually, due to the small cross-section of the trench and the limited width and clear height, construction workers cannot stretch their waists to lift the pipes for transportation and can only operate in a bent-over posture, which makes the operation difficult, time-consuming and labor-intensive. For the direct dragging method, friction will occur between the pipe and the bottom or side wall of the trench or the embedded bracket, which may easily cause damage to the anti-corrosion layer or thermal insulation layer on the surface of the pipe. For the method of using simple transport tools, the embedded brackets in some scenarios will adopt different elevations due to the slope and gradient of the trench and medium pipeline, and the simple transport tools cannot be adjusted in height, and cannot adapt to the needs of changes in the elevation of the brackets in the trench, and have poor applicability.

[0005] Therefore, there is an urgent need for a pipeline transportation method that saves time and effort, can avoid pipeline damage, and has strong applicability. Utility Model Content

[0006] In order to overcome the technical defects of existing pipeline transportation in dark ditches, such as time-consuming and labor-intensive, easy damage to pipelines and poor applicability, the utility model provides a pipeline transportation trolley.

[0007] The pipeline transport trolley provided by the utility model comprises:

[0008] The running wheel assembly is provided with two sets and is distributed front and back, and the axis of each set of running wheel assembly is arranged left and right;

[0009] The legs are provided with two legs corresponding to the walking wheel assemblies, the bottom of the legs are rotatably connected to the corresponding walking wheel assemblies and the rotation axis is arranged left and right;

[0010] A bracket, the front and rear ends of which are respectively rotatably connected to the tops of the two legs and the rotation axes are arranged left and right, and the length of the bracket in the front and rear direction is less than the spacing between the two sets of walking wheel assemblies;

[0011] The telescopic component is arranged horizontally and is located below the bracket. Both ends of the telescopic component are rotatably connected to the middle of the two legs and the rotation axes are arranged left and right.

[0012] Optionally, the walking wheel assembly includes left and right axles and two casters respectively installed at both ends of the axles. A lower shaft sleeve is fixed to the bottom of the leg, and the lower shaft sleeve is gap-mounted on the axle to realize the rotational connection between the bottom of the leg and the walking wheel assembly.

[0013] Optionally, the bracket includes a frame body formed by two transverse axes and two longitudinal supports, the two transverse axes are arranged left and right, an upper sleeve is fixed to the top of the leg, and the upper sleeve is gap-mounted on the transverse axis to realize the rotational connection between the top of the leg and the bracket.

[0014] Optionally, a support is fixed on each longitudinal support, and at least two rollers arranged on the left and right are installed between the two supports.

[0015] Optionally, the roller includes a cylinder body and two support shafts extending outward from both ends of the cylinder body respectively, a slot adapted to the support shaft is opened on the top of the support, the support shaft is placed in the corresponding slot and a locking gasket is fixed to the part extending outward from the corresponding support.

[0016] Optionally, vertically arranged limit rods are fixed on both longitudinal supports, and a limit cylinder is detachably sleeved on the limit rod, the limit rod is lower than the top surface of the roller, and the limit cylinder is higher than the top surface of the roller.

[0017] Optionally, a top screw is screwed onto the upper sleeve.

[0018] Optionally, a self-detaching hook is rotatably mounted on the upper sleeve and the rotation axis is arranged left and right, and the self-detaching hook is suitable for hooking the front end inner wall of the receiving transfer pipeline.

[0019] Optionally, a handrail is detachably fixed on the upper sleeve.

[0020] Optionally, a connecting rod arranged on the left and right is provided in the middle of the leg, a telescopic sleeve is fixed to the end of the telescopic assembly, and the telescopic sleeve is gap-sleeved on the connecting rod to realize the rotational connection between the telescopic assembly and the middle of the leg.

[0021] Optionally, the telescopic assembly includes a left-handed screw, a right-handed screw and a rotating drum, wherein the left-handed screw and the right-handed screw are arranged front to back and the outer ends are rotatably connected to corresponding legs, and the rotating drum is provided with an internal thread and is simultaneously threadedly connected to the inner ends of the left-handed screw and the right-handed screw.

[0022] Optionally, the rotating drum includes two nut members suitable for being threadedly connected to the left-handed screw and the right-handed screw respectively, and a sleeve fixedly connected to the two nut members.

[0023] Optionally, a hand wheel is fixed on the sleeve.

[0024] Compared with the prior art, the technical solution provided by the utility model has the following advantages:

[0025] The utility model provides a pipeline transport trolley, in which the bracket is installed on the front and rear two sets of walking wheel assemblies through the legs. During transportation, the pipeline is placed on the bracket, and the trolley is pushed to complete the transportation of the pipeline. The trolley can adjust the distance between the two legs through the action of the telescopic assembly, thereby realizing the height adjustment of the bracket, and then after the pipeline is transported to the place, it can be docked with the embedded brackets of different elevations, and has stronger adaptability; and there is no need to manually bend over to lift the pipe, which saves time and effort, and can also avoid the friction of the pipeline caused by dragging, thereby avoiding damage to the pipeline during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram showing the structure of a pipeline transport trolley in an embodiment of the utility model;

[0029] Figure 2 A schematic diagram showing the use status of the pipeline transport trolley in the embodiment of the utility model.

[0030] In the figure:

[0031] 1. Travel wheel assembly; 11. Axle; 12. Caster; 2. Leg; 21. Lower bushing; 22. Upper bushing; 23. Top screw; 24. Connecting rod; 3. Bracket; 31. Horizontal axis; 32. Longitudinal support; 33. Support; 34. Roller; 341. Cylinder body; 342. Support shaft; 343. Locking gasket; 35. Limit rod; 36. Limit cylinder; 4. Telescopic assembly; 41. Telescopic sleeve; 42. Left-hand screw; 43. Right-hand screw; 44. Rotating cylinder; 441. Nut; 442. Sleeve; 443. Handwheel; 5. Self-detaching hook; 6. Handrail; 61. Handrail; 62. Handhold. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0035] Reference Figure 1 and Figure 2 The present embodiment provides a pipeline transport trolley, comprising a running wheel assembly 1, a leg 2, a bracket 3 and a telescopic assembly 4. Among them, the running wheel assembly 1 is provided with two sets and is distributed front and back, and the axis of each set of running wheel assembly 1 is arranged left and right; the legs 2 are provided with two corresponding running wheel assemblies 1, and the bottom of the leg 2 is rotatably connected to the corresponding running wheel assembly 1 and the rotation axis is arranged left and right; the front and rear ends of the bracket 3 are respectively rotatably connected to the tops of the two legs 2 and the rotation axes are arranged left and right, and the length of the bracket 3 in the front and rear direction is less than the spacing between the two sets of running wheel assemblies 1; the telescopic assembly 4 is arranged horizontally and is located below the bracket 3, and the two ends of the telescopic assembly 4 are respectively rotatably connected to the middle of the two legs 2 and the rotation axes are arranged left and right.

[0036] Specifically, the travel wheel assembly 1 adopts the following structure: the travel wheel assembly 1 includes a left and right axle 11 and two casters 12 respectively installed at both ends of the axle 11. The casters 12 can be directly fixed on the axle 11 or installed on the axle 11 through bearings.

[0037] It should be noted that the direction of the vehicle's travel is the front, the direction opposite to the forward direction is the rear, and the two sides are the left and right respectively.

[0038] It should be noted that the caster 12 can be a wheel structure with a fixed axis, or a universal wheel or other common wheel structure. When the trolley is pushed to run outside the trench, it is preferred to set the two casters 12 on the force-applying side as universal wheels, which is more conducive to controlling the direction of travel of the trolley.

[0039] Specifically, the bottom of the leg 2 is rotatably connected to the axle 11 through the following structure: a lower sleeve 21 is fixed to the bottom of the leg 2, and the lower sleeve 21 is loosely sleeved on the axle 11 to realize the rotatable connection between the bottom of the leg 2 and the running wheel assembly 1. The sleeve connection between the lower sleeve 21 and the axle 11 can increase the contact area of ​​the rotatable connection, and the rotatable connection is more stable. Of course, the bottom of the leg 2 can also be rotatably connected to the running wheel assembly 1 through a hinged ear or other swivel pair.

[0040] Specifically, the bracket 3 adopts the following structure: the bracket 3 includes a frame body formed by two transverse axes 31 and two longitudinal braces 32 , the two transverse axes 31 are arranged left and right, and the two transverse axes 31 are respectively located at the front and rear ends of the bracket 3 .

[0041] Furthermore, the bracket 3 is provided with the following improved structure: a support 33 is fixed on each longitudinal support 32, and at least two rollers 34 arranged on the left and right are installed between the two supports 33. When in use, the pipe is placed on the roller 34, and even if the front of the trolley is blocked and cannot move forward, the pipe can be pushed to make the pipe move forward independently relative to the trolley, which is more flexible to use.

[0042] Specifically, the roller 34 adopts the following structure: the roller 34 includes a cylinder 341 and two support shafts 342 extending outward from both ends of the cylinder 341, a slot adapted to the support shaft 342 is provided on the top of the support 33, and a locking gasket 343 is fixed to the support shaft 342 placed in the corresponding slot and extending outward from the corresponding support 33. The locking gasket 343 can be fixed to the support shaft 342 by welding, screwing or other means. The combination of the slot and the locking gasket 343 can prevent the roller 34 from moving in the left and right directions, thereby ensuring the stability of the structure.

[0043] Furthermore, both longitudinal supports 32 are fixed with vertically arranged limiting rods 35, and limiting cylinders 36 are detachably sleeved on the limiting rods 35. The limiting rods 35 are lower than the top surface of the roller 34, and the limiting cylinders 36 are higher than the top surface of the roller 34. When transporting the pipeline, the limiting cylinders 36 are inserted into the limiting rods 35. Since the limiting cylinders 36 are higher than the top surface of the roller 34, the limiting cylinders 36 can limit the left and right sides of the pipeline to prevent the pipeline from falling off the bracket 3 during transportation; when the pipeline needs to be disassembled, the limiting cylinders 36 are removed from the limiting rods 35. Since the limiting rods 35 are lower than the top surface of the roller 34, the limiting rods 35 will not block the disassembly of the pipeline, ensuring the convenience of unloading the pipeline.

[0044] Specifically, the top of the leg 2 and the bracket 3 are rotatably connected by the following structure: an upper sleeve 22 is fixed to the top of the leg 2, and the upper sleeve 22 is sleeved on the horizontal shaft 31 to realize the rotatable connection between the top of the leg 2 and the bracket 3. The sleeve connection between the upper sleeve 22 and the horizontal shaft 31 can increase the contact area of ​​the rotatable connection, and the rotatable connection is more stable. Of course, the top of the leg 2 can also be rotatably connected to the bracket 3 by a hinge ear or other swivel pair.

[0045] Furthermore, the rotation connection between the top of the leg 2 and the bracket 3 is also provided with the following improved structure: a top screw 23 is screwed on the upper sleeve 22. By screwing the top screw 23 against the horizontal axis 31, the upper sleeve 22 and the horizontal axis 31 are relatively fixed, so as to keep the angle between the bracket 3 and the leg 2 fixed, ensure that the bracket 3 is in a horizontal state, and then the pipeline will not touch the ground at one end when placed, eliminate the influence of the pipeline length on the placement of the pipeline, and finally can be transported by a single vehicle or by multiple vehicles.

[0046] Specifically, the top screw 23 adopts the following installation structure: the upper sleeve 22 is provided with a through hole, a nut is fixed at the position corresponding to the through hole, and the top screw 23 is screwed into the nut and passes through the through hole to abut against the horizontal axis 31. Of course, a threaded hole can also be directly provided on the upper sleeve 22, and the top screw 23 can be screwed into the threaded hole.

[0047] More specifically, two left-right symmetrical top screws 23 are provided on a single upper sleeve 22 , but of course only one or more top screws 23 may be provided.

[0048] Specifically, the middle part of the leg 2 and the telescopic assembly 4 are rotatably connected through the following structure: the middle part of the leg 2 is provided with a connecting rod 24 arranged on the left and right, and a telescopic sleeve 41 is fixed to the end of the telescopic assembly 4, and the telescopic sleeve 41 is sleeved on the connecting rod 24 to realize the rotatable connection between the telescopic assembly 4 and the middle part of the leg 2. The sleeve connection between the telescopic sleeve 41 and the connecting rod 24 can increase the contact area of ​​the rotatable connection, and the rotatable connection is more stable. Of course, the middle part of the leg 2 can also be rotatably connected with the telescopic assembly 4 through a hinge ear or other swivel pair.

[0049] It should be noted that the middle part of the leg 2, i.e., the part between the top of the leg 2 and the bottom of the leg 2, can be either upper or lower, and does not specifically refer to the midpoint of the leg 2. Preferably, the telescopic assembly 4 is connected to the middle and lower part of the leg 2, and the stability of the entire structure is stronger.

[0050] Specifically, the telescopic assembly 4 adopts the following structure: the telescopic assembly 4 includes a left-handed screw 42, a right-handed screw 43 and a rotating drum 44, the left-handed screw 42 and the right-handed screw 43 are arranged front and back and the outer ends are both rotatably connected to the corresponding legs 2, and the rotating drum 44 is provided with an internal thread and is simultaneously screwed to the inner ends of the left-handed screw 42 and the right-handed screw 43. When in use, the rotating drum 44 can be rotated to achieve the synchronous extension or shortening of the left-handed screw 42 and the right-handed screw 43 relative to the rotating drum 44, thereby achieving the telescopic assembly 4, and then achieving the height adjustment of the bracket 3. The telescopic assembly 4 of this structure can ensure the synchronization of the movement of the two legs 2, and is more conducive to ensuring the level of the bracket 3. Of course, the telescopic assembly 4 can also use two sleeve rods symmetrically distributed front and back, and can also use two linear push rods symmetrically distributed front and back or other commonly used telescopic parts.

[0051] More specifically, the rotating drum 44 adopts the following structure: the rotating drum 44 includes two nut members 441 suitable for being respectively screwed on the left-handed screw rod 42 and the right-handed screw rod 43, and a sleeve 442 fixedly connected to the two nut members 441. The rotating drum 44 of this structure only needs to open nuts on the nut members 441, and then use a common sleeve 442 structure to connect the two nut members 441, which is more convenient to process. Of course, the rotating drum 44 can also be an integral structure with internal threads.

[0052] Further, the sleeve 442 is provided with the following improved structure: a hand wheel 443 is fixed on the sleeve 442. It is more convenient to rotate the sleeve 442 by the hand wheel 443.

[0053] In addition, the pipeline transport trolley of this embodiment is further provided with a self-detaching hook 5, which is rotatably mounted on the upper shaft sleeve 22 and has a rotation axis arranged left and right, and is suitable for hooking the front inner wall of the receiving and transporting pipeline. When it is necessary to keep the pipeline and the trolley relatively fixed, the self-detaching hook 5 is hooked on the front inner wall of the pipeline, and the construction personnel push the pipeline from the rear side, thereby linking the entire trolley to move forward synchronously; when the front of the trolley is blocked and the pipeline needs to be pushed alone, it is only necessary to pull back the pipeline, and the self-detaching hook 5 automatically detaches from the pipeline under the action of gravity, and then continues to push the pipeline forward, so that the pipeline moves forward relative to the trolley.

[0054] In addition, the pipeline transport trolley of this embodiment is further provided with a handrail 6, which is detachably fixed on the upper shaft sleeve 22. When the trolley moves in a non-pipeline trench environment, the construction personnel can push the trolley to move by the handrail 6, which is more convenient; when the trolley moves in a pipe trench, the construction personnel can remove the handrail 6 to avoid interference of the handrail 6 with the placement of the pipeline.

[0055] Specifically, the handrail 6 is detachably fixed to the upper sleeve 22 by the following structure: a pipe clamp is fixed in the middle of the upper sleeve 22, the pipe clamp is provided with an internal thread, the handrail 6 includes a handrail 61 and a hand-held portion 62, one end of the handrail 61 is provided with an external thread, and the handrail 61 is screwed into the pipe clamp to achieve a detachable connection. Of course, the handrail 6 can also be detachably connected by a buckle or magnetic attraction or other common structures.

[0056] The working process of the pipeline transport vehicle of this embodiment is as follows:

[0057] When the trolley is running outside the trench, the construction worker pushes the trolley to move by the handrail 6;

[0058] When the trolley is running in the trench, the construction personnel remove the handrail 6, and put the trolley into the trench from the lower pipe working surface, then rotate the sleeve to adjust the trolley to a suitable height, and tighten the top screw 23 to maintain the height of the trolley, then place the pipe to be transported on the roller 34 of the trolley and arrange it front and back, and the pipe is limited left and right by the limit cylinder 36. The construction personnel lift the self-detaching hook 5 and push the pipe forward at the same time so that the self-detaching hook 5 is stuck in the front inner wall of the pipe, and finally the construction personnel push the pipeline linkage trolley forward as a whole; if the front of the trolley is blocked, the construction personnel pull back the pipe to make the self-detaching hook 5 fall off, and then continue to push the pipe to achieve the separate advancement of the pipe. When the pipe is moved into place, the limit cylinder 36 is removed, and then the pipe is pushed from the side to the embedded bracket.

[0059] The above is only a specific implementation of the utility model, so that those skilled in the art can understand or implement the utility model. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A pipeline transport vehicle, It is characterized in that include: A running wheel assembly (1), which is provided with two sets and is distributed front and back, and the axis of each set of running wheel assemblies (1) is arranged left and right; A support leg (2), two of which are provided corresponding to the running wheel assembly (1), the bottom of the support leg (2) being rotatably connected to the corresponding running wheel assembly (1) and the rotation axis being arranged left and right; A bracket (3), the front and rear ends of which are respectively rotatably connected to the tops of the two legs (2) and the rotation axes are both arranged left and right, and the length of the bracket (3) in the front and rear direction is less than the spacing between the two sets of walking wheel assemblies (1); The telescopic component (4) is arranged horizontally and is located below the bracket (3); both ends of the telescopic component (4) are rotatably connected to the middle of the two legs (2) and the rotation axes are arranged left and right.

2. The pipeline transport vehicle according to claim 1, It is characterized in that The walking wheel assembly (1) comprises axles (11) arranged on the left and right and two casters (12) respectively mounted on the two ends of the axles (11); a lower shaft sleeve (21) is fixed to the bottom of the support leg (2); the lower shaft sleeve (21) is loosely sleeved on the axle (11) to achieve a rotational connection between the bottom of the support leg (2) and the walking wheel assembly (1).

3. The pipeline transport vehicle according to claim 1, It is characterized in that The bracket (3) comprises a frame body formed by splicing two transverse axes (31) and two longitudinal braces (32), the two transverse axes (31) being arranged on the left and right, an upper shaft sleeve (22) being fixed to the top of the support leg (2), the upper shaft sleeve (22) being loosely sleeved on the transverse axis (31) to realize a rotational connection between the top of the support leg (2) and the bracket (3).

4. The pipeline transport vehicle according to claim 3, It is characterized in that A support (33) is fixed on each longitudinal support (32), and at least two rollers (34) arranged on the left and right are installed between the two supports (33).

5. The pipeline transport vehicle according to claim 4, It is characterized in that The roller (34) comprises a cylinder (341) and two support shafts (342) extending outwardly from two ends of the cylinder (341), the top of the support (33) is provided with a slot adapted to the support shaft (342), and a locking gasket (343) is fixed to the portion of the support shaft (342) placed in the corresponding slot and extending outwardly from the corresponding support (33).

6. The pipeline transport vehicle according to claim 4, It is characterized in that A vertically arranged limiting rod (35) is fixed on each of the two longitudinal supports (32), and a limiting cylinder (36) is detachably sleeved on the limiting rod (35), the limiting rod (35) is lower than the top surface of the roller (34), and the limiting cylinder (36) is higher than the top surface of the roller (34).

7. The pipeline transport vehicle according to claim 3, It is characterized in that A top screw (23) is screwed onto the upper shaft sleeve (22).

8. The pipeline transport vehicle according to claim 3, It is characterized in that A self-detaching hook (5) is rotatably mounted on the upper shaft sleeve (22) and the rotation axis is arranged left and right. The self-detaching hook (5) is suitable for hooking onto the front end inner wall of the receiving transfer pipe.

9. The pipeline transport vehicle according to claim 3, It is characterized in that A handrail (6) is detachably fixed on the upper shaft sleeve (22).

10. The pipeline transport vehicle according to claim 1, It is characterized in that The middle part of the support leg (2) is provided with a connecting rod (24) arranged on the left and right, and the end of the telescopic assembly (4) is fixed with a telescopic shaft sleeve (41), and the telescopic shaft sleeve (41) is sleeved on the connecting rod (24) to realize the rotational connection between the telescopic assembly (4) and the middle part of the support leg (2).

11. The pipeline transport vehicle according to claim 1, It is characterized in that The telescopic assembly (4) comprises a left-handed screw (42), a right-handed screw (43) and a rotating drum (44); the left-handed screw (42) and the right-handed screw (43) are arranged front and back and the outer ends of the left-handed screw (42) and the right-handed screw (43) are rotatably connected to the corresponding legs (2); the rotating drum (44) is provided with an internal thread and is simultaneously screwed to the inner ends of the left-handed screw (42) and the inner ends of the right-handed screw (43).

12. The pipeline transport vehicle according to claim 11, It is characterized in that The rotating cylinder (44) comprises two nut members (441) suitable for being respectively threaded onto a left-handed screw rod (42) and a right-handed screw rod (43), and a sleeve (442) fixedly connected to the two nut members (441).

13. The pipeline transport vehicle according to claim 12, It is characterized in that A hand wheel (443) is fixed on the sleeve (442).

Images