A pipe gallery pipeline reversing device in a narrow space

Abstract

The utility model relates to a kind of inverted conveyors for pipe gallery pipeline in narrow space, including first inverted conveyors, second inverted conveyors, third inverted conveyors and winch;First inverted conveyors are set on the lower horizontal ground of pipe gallery, second inverted conveyors are set on the ramp of pipe gallery, third inverted conveyors are set on the upper horizontal ground of pipe gallery, and first inverted conveyors, second inverted conveyors and third inverted conveyors are sequentially arranged;Winch is fixed on the upper horizontal ground of pipe gallery, and the interval between winch and third inverted conveyors is preset distance, and the free end of steel wire rope on winch is connected with the pipeline to be inverted;So set, compared with using manual gourd inverted conveying large pipeline, shorten the inverted conveying time of pipeline, reduce construction difficulty, improve construction efficiency, and ensure construction safety.

Description

Technical Field

[0001] This utility model relates to the field of pipe gallery technology, and in particular to a transfer device for pipe galleries in confined spaces. Background Technology

[0002] Currently, utility tunnels are where many pipelines are concentrated. Conventional methods for hoisting pipelines in utility tunnels involve using cranes or hoists to lift the pipelines to the designated location. However, in the confined space of a utility tunnel, cranes cannot be accessed, and simply using manual hoists to move large pipelines poses safety risks. Overall, the construction is more difficult, the moving cycle is longer, and construction efficiency is reduced. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a transfer device for pipe racks in confined spaces. Its advantages are that it can shorten the transfer time of pipes, reduce the construction difficulty, improve the construction efficiency, and ensure the construction safety.

[0004] The above-mentioned utility model objective is achieved through the following technical solution: a transfer device for pipes in a confined space within a pipe gallery, comprising a first transfer component, a second transfer component, a third transfer component, and a winch; the first transfer component is disposed on the lower horizontal ground of the pipe gallery, the second transfer component is disposed on the ramp of the pipe gallery, and the third transfer component is disposed on the upper horizontal ground of the pipe gallery, the first transfer component, the second transfer component, and the third transfer component are arranged sequentially; the winch is fixed on the upper horizontal ground of the pipe gallery, a preset distance is maintained between the winch and the third transfer component, and the free end of the wire rope on the winch is connected to the pipe to be transferred.

[0005] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model includes a first transport component comprising a fixed frame and a plurality of first support rollers. The fixed frame is fixed to the lower horizontal ground of the pipe rack, and the bottom ends of the plurality of first support rollers are connected to the top surface of the fixed frame. The plurality of first support rollers are spaced apart along a first direction of the fixed frame.

[0006] Preferably, the pipe conveying device for pipe gallery in a confined space provided by this utility model includes a first support roller comprising a first sliding roller and two first support rods. The bottom ends of the two first support rods are connected to the top surface of the fixed frame. The two first support rods are arranged opposite each other along the second direction of the fixed frame. The top ends of the two first support rods are each provided with a U-shaped opening. The opposite ends of the first sliding roller are respectively inserted into the two U-shaped openings. The first sliding roller can rotate relative to the first support rod.

[0007] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model includes a second transport component comprising a rectangular frame and a plurality of second support rollers. The rectangular frame is fixed to the ramp of the pipe rack by a mounting bracket. The bottom ends of the plurality of second support rollers are all connected to the side of the rectangular frame away from the ramp. A preset distance is spaced between each pair of adjacent second support rollers.

[0008] Preferably, the pipe conveying device for pipe gallery in a narrow space provided by this utility model includes a second support roller comprising a second sliding roller and two second support rods. The bottom ends of the two second support rods are connected to the side of the rectangular frame away from the ramp. The two second support rods are arranged opposite each other along the second direction. The top ends of the two second support rods are provided with U-shaped grooves. The opposite ends of the second sliding roller are respectively inserted into the two U-shaped grooves. The second sliding roller can rotate relative to the second support rods.

[0009] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model includes a mounting frame comprising two first uprights and two second uprights. The two first uprights are respectively disposed on opposite sides of the rectangular frame. The bottom end of each first upright is connected to the ground of the pipe rack, and the side wall of each first upright near its top is connected to the outer side wall of the rectangular frame at the end opposite to the first transport component. The two second uprights are respectively disposed on opposite sides of the rectangular frame. The bottom end of each second upright is connected to the ground of the pipe rack, and the side wall of each second upright near its top is connected to the outer side wall of the rectangular frame at the end facing the first transport component.

[0010] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model includes a third transport component comprising a plurality of third support rollers, the bottom ends of which are all connected to the upper horizontal ground of the pipe rack, and the plurality of third support rollers are spaced apart along a first direction.

[0011] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model includes a third support roller comprising a third sliding roller and two third support rods. The bottom ends of the two third support rods are connected to the upper horizontal ground of the pipe rack. The two third support rods are arranged opposite each other along the second direction. The top ends of the two third support rods are each provided with a U-shaped notch. The opposite ends of the third sliding roller are respectively inserted into the two U-shaped notches. The third sliding roller is capable of rotating relative to the third support rods.

[0012] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model has at least one gantry frame installed on the upper horizontal ground of the pipe rack, and a pulley installed at the top of the gantry frame. The wire rope on the winch passes around the pulley and is connected to the pipe to be transported.

[0013] Preferably, the pipe transport device for pipe racks in confined spaces provided by this utility model further includes a portal frame and a hand-operated hoist. The bottom end of the portal frame is connected to the ground of the pipe rack. The second transport component is installed inside the portal frame. The hand-operated hoist is installed at the top of the portal frame. The free end of the hand-operated hoist is used to connect to the pipe to be transported.

[0014] In summary, the beneficial technical effects of this utility model are as follows: The pipe transport device for confined spaces provided in this application includes a first transport component, a second transport component, a third transport component, and a winch; the first transport component is set on the lower horizontal ground of the pipe gallery, the second transport component is set on the ramp of the pipe gallery, and the third transport component is set on the upper horizontal ground of the pipe gallery, with the first, second, and third transport components arranged sequentially; the winch is fixed on the upper horizontal ground of the pipe gallery, with a preset distance between the winch and the third transport component, and the free end of the wire rope on the winch is connected to the pipe to be transported; this arrangement, compared with using a manual hoist to transport large pipes, shortens the pipe transport time, reduces construction difficulty, improves construction efficiency, and ensures construction safety. Attached Figure Description

[0015] Figure 1 This is a front view of the pipe rack transport device for confined spaces provided in this embodiment of the utility model.

[0016] Figure 2 This is a cross-sectional view AA of the pipe rack transport device for confined spaces provided in this embodiment of the utility model.

[0017] Figure 3 This is a cross-sectional view BB of the pipe rack transport device for confined spaces provided in this embodiment of the utility model.

[0018] In the diagram, 1. Transfer device; 10. First transfer assembly; 11. Fixed frame; 111. First connecting rod; 112. Second connecting rod; 12. First support roller; 121. First sliding roller; 1211. Roller body; 1212. Rotating rod; 122. First support rod; 20. Second transfer assembly; 21. Rectangular frame; 22. Second support roller; 221. Second sliding roller; 222. Second support rod; 23. First upright; 24. Second upright; 30. Third transfer assembly; 31. Third sliding roller; 32. Third support rod; 40. Winch; 41. Gantry frame; 50. Portal frame; 51. Hand chain hoist; 60. First direction; 70. Second direction; 2. Pipe to be transferred; 3. Pipe gallery. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Reference Figures 1 to 3 This utility model discloses a pipe-transfer device 1 for use in a confined space within a pipe gallery 3, comprising a first transfer component 10, a second transfer component 20, a third transfer component 30, and a winch 40. The first transfer component 10 is positioned on the lower horizontal ground of the pipe gallery 3, the second transfer component 20 is positioned at the ramp of the pipe gallery 3, and the third transfer component 30 is positioned on the upper horizontal ground of the pipe gallery 3, arranged sequentially. The winch 40 is fixed to the upper horizontal ground of the pipe gallery 3, with a preset distance between the winch 40 and the third transfer component 30. The free end of the wire rope on the winch 40 is connected to the pipe 2 to be transferred. Compared with using a manual hoist to transfer large pipes, this configuration shortens the pipe transfer time, reduces construction difficulty, improves construction efficiency, and ensures construction safety.

[0021] Specifically, with Figure 2 Taking the indicated orientation as an example, the first reverse transport component 10, the second reverse transport component 20, and the third reverse transport component 30 are set sequentially from right to left.

[0022] The process of using the pipe transport device 1 for pipes in the confined space 3 provided in this embodiment is as follows: the transport device 1 is set in the pipe gallery 3, the free end of the wire rope on the winch 40 is connected to the pipe 2 to be transported, and the winch 40 is used to pull the pipe 2 to be transported forward until the pipe 2 to be transported is transported to the preset position.

[0023] Furthermore, in this embodiment, the first transport component 10 includes a fixed frame 11 and a plurality of first support rollers 12. The fixed frame 11 is fixed on the lower horizontal ground of the pipe gallery 3, and the bottom ends of the plurality of first support rollers 12 are all connected to the top surface of the fixed frame 11. The plurality of first support rollers 12 are spaced apart along the first direction 60 of the fixed frame 11.

[0024] It should be noted that the first direction 60 of the fixed frame 11 is the length direction of the fixed frame 11, and the second direction 70 of the fixed frame 11 is the width direction of the fixed frame 11. The first direction 60 and the second direction 70 of the fixed frame 11 are set perpendicular to each other.

[0025] The fixed frame 11 is laid on the lower horizontal ground. The fixed frame 11 includes two first connecting rods 111 and two second connecting rods 112. The two first connecting rods 111 are arranged opposite each other and both extend along the first direction 60. The two second connecting rods 112 are arranged opposite each other and both extend along the second direction 70. The first connecting rods 111 and the two second connecting rods 112 are connected end to end in sequence to form a rectangular frame.

[0026] For example, both the first connecting rod 111 and the second connecting rod 112 are made of channel steel. Of course, the first connecting rod 111 and the second connecting rod 112 can also be made of I-beam steel.

[0027] Furthermore, in this embodiment, the first support roller 12 includes a first sliding roller 121 and two first support rods 122. The bottom ends of the two first support rods 122 are connected to the top surface of the fixed frame 11. The two first support rods 122 are arranged opposite to each other along the second direction 70 of the fixed frame 11. The top ends of the two first support rods 122 are each provided with a U-shaped opening. The opposite ends of the first sliding roller 121 are respectively inserted into the two U-shaped openings. The first sliding roller 121 can rotate relative to the first support rods 122.

[0028] For example, the first support rod 122 can be made of channel steel, or of course, the first support rod 122 can be made of I-beam steel.

[0029] In this embodiment, the first sliding roller 121 includes a roller body 1211 and two rotating rods 1212. The two rotating rods 1212 are respectively disposed at opposite ends of the roller body 1211. One end of the rotating rod 1212 is connected to the end of the roller body 1211, and the other end of the rotating rod 1212 extends outward along the center line of the roller body 1211.

[0030] It should be noted that the diameter of the rotating rod 1212 is smaller than the diameter of the roller body 1211.

[0031] The centerline of the roller body 1211 is parallel to the second direction 70, and the centerline of the rotating rod 1212 is parallel to the centerline of the roller body 1211. In some feasible embodiments, the centerline of the roller body 1211 and the centerline of the rotating rod 1212 are collinear. During installation, the two rotating rods 1212 are respectively inserted into the U-shaped opening, and the rotating rods 1212 can rotate within the U-shaped opening.

[0032] During the relocation process, Figure 2 Taking the orientation shown as an example, the free end of the wire rope on the winch 40 is connected to the left end of the pipe 2 to be transported. The winch 40 pulls the pipe 2 to be transported to the left. At this time, the pipe 2 to be transported is located above the first support roller 12. The outer peripheral wall of the pipe 2 to be transported is in contact with the outer peripheral wall of the roller 1211. When the winch 40 pulls the pipe 2 to be transported to the left, the pipe 2 to be transported drives the roller 1211 to rotate, so that the pipe 2 to be transported moves smoothly to the left.

[0033] Continue to refer to Figure 2In this embodiment, the second transport component 20 includes a rectangular frame 21 and a plurality of second support rollers 22. The rectangular frame 21 is fixed on the ramp of the pipe gallery 3 by a mounting frame. The bottom ends of the plurality of second support rollers 22 are all connected to the side of the rectangular frame 21 away from the ramp. There is a preset distance between each pair of adjacent second support rollers 22.

[0034] The rectangular frame 21 is made of channel steel and is laid on the ramp. The end of the rectangular frame 21 facing the first transport component 10 is in contact with the fixed frame 11.

[0035] In this embodiment, the mounting frame includes two first uprights 23 and two second uprights 24. The two first uprights 23 are respectively disposed on opposite sides of the rectangular frame 21. The bottom end of each first upright 23 is connected to the ground of the pipe gallery 3, and the side wall of each first upright 23 near its top end is connected to the outer side wall of the rectangular frame 21 at the end opposite to the first transport component 10. The two second uprights 24 are respectively disposed on opposite sides of the rectangular frame 21. The bottom end of each second upright 24 is connected to the ground of the pipe gallery 3, and the side wall of each second upright 24 near its top end is connected to the outer side wall of the rectangular frame 21 at the end facing the first transport component 10.

[0036] Specifically, the first upright 23 and the second upright 24 are arranged parallel to each other, with a predicted distance between them. Figure 1 Taking the orientation shown as an example, the two first uprights 23 are respectively set on the left and right sides of the end of the rectangular frame 21 that is away from the first transport component 10; the two second uprights 24 are respectively set on the left and right sides of the end of the rectangular frame 21 that is facing the first transport component 10.

[0037] Furthermore, in this embodiment, the second support roller 22 includes a second sliding roller 221 and two second support rods 222. The bottom ends of the two second support rods 222 are connected to the side of the rectangular frame 21 away from the ramp. The two second support rods 222 are arranged opposite to each other along the second direction 70. The top ends of the two second support rods 222 are provided with U-shaped grooves. The opposite ends of the second sliding roller 221 are respectively inserted into the two U-shaped grooves. The second sliding roller 221 can rotate relative to the second support rods 222.

[0038] For example, the second support rod 222 can be made of channel steel, or of course, the second support rod 222 can also be made of I-beam steel.

[0039] It should be noted that the structure of the second slide roller 221 is basically the same as that of the first slide roller 121, and the structure of the second slide roller 221 will not be described in detail here.

[0040] The centerline of the second sliding roller 221 is set parallel to the second direction 70.

[0041] Furthermore, the pipe transport device 1 for the confined space pipe gallery 3 provided in this embodiment also includes a portal frame 50 and a hand-operated hoist 51. The bottom end of the portal frame 50 is connected to the ground of the pipe gallery 3. The second transport component 20 is installed inside the portal frame 50. The hand-operated hoist 51 is installed at the top of the portal frame 50. The free end of the hand-operated hoist 51 is used to connect with the pipe 2 to be transported. By setting the hand-operated hoist 51, it is convenient to transport the pipe 2 to be transported from the first transport component 10 to the second transport component 20.

[0042] The top of the portal frame 50 is higher than the upper horizontal ground of the pipe gallery 3.

[0043] For example, the portal frame 50 is made of H-beams. Of course, the portal frame 50 can also be made of channel steel.

[0044] by Figure 2 Taking the indicated orientation as an example, during the transfer process, due to the large angle between the ramp and the lower horizontal ground, and the relatively long length of the pipe 2 to be transferred, it is impossible to directly transfer the pipe 2 to the second transfer assembly 20. It is necessary to first use the winch 40 to pull the pipe 2 to the front of the second transfer assembly 20, connect the free end of the hand-operated hoist 51 to the left end of the pipe 2, and use the cooperation of the portal frame 50 and the hand-operated hoist 51 to hoist the left end of the pipe 2 to the second transfer assembly 20. Then, the winch 40 is used to pull the left end of the pipe 2 to be transported onto the third transport component 30. When one-third of the length of the pipe 2 to be transported reaches the third transport component 30, the free end of the hand chain hoist 51 is connected to the right end of the pipe 2 to be transported. The right end of the pipe 2 to be transported is lifted by the cooperation of the gantry frame 50 and the hand chain hoist 51 so that the pipe 2 to be transported is in a horizontal state. Then, the winch 40 is used to pull the pipe 2 to be transported to the preset position.

[0045] Continue to refer to Figure 2 In this embodiment, the third transport component 30 includes a plurality of third support rollers, the bottom ends of which are connected to the upper horizontal ground of the pipe gallery 3, and the plurality of third support rollers are spaced apart along the first direction 60.

[0046] The third support roller includes a third sliding roller 31 and two third support rods 32. The bottom ends of the two third support rods 32 are connected to the upper horizontal ground of the pipe gallery 3. The two third support rods 32 are arranged opposite each other along the second direction 70. The top ends of the two third support rods 32 are provided with U-shaped notches. The opposite ends of the third sliding roller 31 are respectively inserted into the two U-shaped notches. The third sliding roller 31 can rotate relative to the third support rods 32.

[0047] For example, the third support rod 32 can be made of channel steel, or of course, the third support rod 32 can also be made of I-beam steel.

[0048] It should be noted that the structure of the third slide roller 31 is basically the same as that of the first slide roller 121, and the structure of the third slide roller 31 will not be described in detail here.

[0049] The centerline of the third roller 31 is set parallel to the second direction 70.

[0050] Furthermore, in this embodiment, at least one gantry frame 41 is provided on the upper horizontal ground of the pipe gallery 3, and a pulley is provided at the top of the gantry frame 41. The wire rope on the winch 40 passes around the pulley and is connected to the pipe 2 to be transported.

[0051] Depend on Figure 2 As shown, in this embodiment, there are two gantry frames 41. Of course, there can also be three or four gantry frames 41.

[0052] Specifically, two gantry frames 41 are spaced apart along the first direction 60, and each gantry frame 41 is equipped with a pulley at its top. During the transfer process, the wire rope on the winch 40 passes around the two pulleys in sequence and connects to the pipe 2 to be transferred.

[0053] The transfer process of the pipe transport device 1 for pipes in the confined space pipe gallery 3 provided in this embodiment is as follows: Figure 2 Taking the indicated orientation as an example, the wire rope on the winch 40 passes over the pulley and connects to the left end of the pipe 2 to be transported. The winch 40 pulls the pipe 2 to be transported to the front of the second transport component 20. Then, the free end of the hand chain hoist 51 is connected to the left end of the pipe 2 to be transported. Using the cooperation of the portal frame 50 and the hand chain hoist 51, the left end of the pipe 2 to be transported is hoisted onto the second transport component 20. Then, the winch 40 pulls the left end of the pipe 2 to be transported onto the third transport component 30. When one-third of the length of the pipe 2 to be transported reaches the third transport component 30, the free end of the hand chain hoist 51 is connected to the right end of the pipe 2 to be transported. Using the cooperation of the portal frame 50 and the hand chain hoist 51, the right end of the pipe 2 to be transported is lifted so that the pipe 2 to be transported is in a horizontal state. Then, the winch 40 pulls the pipe 2 to the preset position.

[0054] The pipe transport device 1 for confined spaces in a pipe gallery 3 provided in this application includes a first transport component 10, a second transport component 20, a third transport component 30, and a winch 40. The first transport component 10 is installed on the lower horizontal ground of the pipe gallery 3, the second transport component 20 is installed on the ramp of the pipe gallery 3, and the third transport component 30 is installed on the upper horizontal ground of the pipe gallery 3. The first transport component 10, the second transport component 20, and the third transport component 30 are arranged sequentially. The winch 40 is fixed on the upper horizontal ground of the pipe gallery 3, and there is a preset distance between the winch 40 and the third transport component 30. The free end of the wire rope on the winch 40 is connected to the pipe 2 to be transported. Compared with using a manual hoist to transport large pipes, this arrangement shortens the pipe transport time, reduces construction difficulty, improves construction efficiency, and ensures construction safety.

[0055] The pipe transport device 1 for pipes in confined spaces provided by this utility model has the following advantages: the device has a simple structure, is easy to manufacture, and is easy to operate.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A transfer device for pipe racks in confined spaces, characterized in that: Includes a first conveying assembly, a second conveying assembly, a third conveying assembly, and a winch; The first transport component is located on the lower horizontal ground of the pipe gallery, the second transport component is located on the ramp of the pipe gallery, and the third transport component is located on the upper horizontal ground of the pipe gallery. The first transport component, the second transport component, and the third transport component are arranged sequentially. The winch is fixed on the upper horizontal ground of the pipe gallery, and there is a preset distance between the winch and the third transfer component. The free end of the wire rope on the winch is connected to the pipe to be transferred.

2. The transfer device for pipe racks in confined spaces according to claim 1, characterized in that: The first transport assembly includes a fixed frame and a plurality of first support rollers. The fixed frame is fixed to the lower horizontal ground of the pipe gallery. The bottom ends of the plurality of first support rollers are connected to the top surface of the fixed frame. The plurality of first support rollers are spaced apart along a first direction of the fixed frame.

3. The transfer device for pipe racks in confined spaces according to claim 2, characterized in that: The first support roller includes a first sliding roller and two first support rods. The bottom ends of the two first support rods are connected to the top surface of the fixed frame. The two first support rods are arranged opposite each other along the second direction of the fixed frame. The top ends of the two first support rods are provided with U-shaped openings. The opposite ends of the first sliding roller are respectively inserted into the two U-shaped openings. The first sliding roller can rotate relative to the first support rods.

4. The transfer device for pipe racks in confined spaces according to claim 3, characterized in that: The second transport component includes a rectangular frame and a plurality of second support rollers. The rectangular frame is fixed to the ramp of the pipe gallery by a mounting bracket. The bottom ends of the plurality of second support rollers are all connected to the side of the rectangular frame away from the ramp. There is a preset distance between each pair of adjacent second support rollers.

5. The transfer device for pipe racks in confined spaces according to claim 4, characterized in that: The second support roller includes a second sliding roller and two second support rods. The bottom ends of the two second support rods are connected to the side of the rectangular frame away from the ramp. The two second support rods are arranged opposite each other along the second direction. The top ends of the two second support rods are provided with U-shaped grooves. The opposite ends of the second sliding roller are respectively inserted into the two U-shaped grooves. The second sliding roller can rotate relative to the second support rods.

6. The transfer device for pipe racks in confined spaces according to claim 4, characterized in that: The mounting frame includes two first uprights and two second uprights. The two first uprights are respectively disposed on opposite sides of the rectangular frame. The bottom end of each first upright is connected to the ground of the pipe gallery, and the side wall of each first upright near its top is connected to the outer side wall of the rectangular frame away from the first transport component. Two second uprights are respectively disposed on opposite sides of the rectangular frame. The bottom end of each second upright is connected to the ground of the pipe gallery, and the side wall of each second upright near its top is connected to the outer side wall of the rectangular frame facing the first transport component.

7. The transfer device for pipe racks in confined spaces according to claim 3, characterized in that: The third transport component includes multiple third support rollers, the bottom ends of which are connected to the upper horizontal ground of the pipe gallery, and the multiple third support rollers are spaced apart along a first direction.

8. The transfer device for pipe racks in confined spaces according to claim 7, characterized in that: The third support roller includes a third sliding roller and two third support rods. The bottom ends of the two third support rods are connected to the upper horizontal ground of the pipe gallery. The two third support rods are arranged opposite each other along the second direction. The top ends of the two third support rods are provided with U-shaped notches. The opposite ends of the third sliding roller are respectively inserted into the two U-shaped notches. The third sliding roller can rotate relative to the third support rods.

9. The transfer device for pipe racks in confined spaces according to claim 1, characterized in that: At least one gantry frame is installed on the upper horizontal ground of the pipe gallery. A pulley is installed at the top of the gantry frame, and the wire rope on the winch passes around the pulley and is connected to the pipe to be transported.

10. The transfer device for pipe racks in confined spaces according to claim 1, characterized in that: It also includes a portal frame and a hand-operated hoist. The bottom end of the portal frame is connected to the ground of the pipe gallery. The second transfer component is installed inside the portal frame. The hand-operated hoist is installed at the top of the portal frame. The free end of the hand-operated hoist is used to connect to the pipe to be transferred.

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