Pipeline internal construction platform

Abstract

The application relates to the technical field of pipeline construction equipment, in particular to a pipeline internal construction platform, which comprises: a plurality of arc-shaped frames, the plurality of arc-shaped frames are arranged to form an annular frame, an elastic locking piece is arranged between two adjacent arc-shaped frames, and a first roller is arranged on the annular frame; a telescopic mechanism is arranged in the interior of the annular frame, and the two ends of the telescopic mechanism are connected with the end portions of the arc-shaped frames; and a self-balancing mechanism is arranged on one end of the telescopic mechanism which is far away from the top of the pipeline. During the installation process, the annular frame can avoid the high-altitude operation of construction personnel in erecting the steel pipe frame, the safety during the construction process is guaranteed, the dismounting process of the annular frame is relatively simple, the steel pipe does not need to be repeatedly erected and fixed like the steel pipe frame, and the construction efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of pipeline construction equipment technology, and in particular to an internal pipeline construction platform. Background Technology

[0002] During pipeline construction, it is often necessary to treat the inner wall of the pipeline, such as binding of reinforcing bars, waterproofing coating, or installation of supports, grouting nails, and anchor bolts. When carrying out various processes on the top and higher parts of the inner wall, construction workers usually use temporary steel pipe scaffolding to assist in climbing. Although the various processes can eventually be completed normally, in actual construction, the process of erecting and dismantling temporary steel pipe scaffolding is very cumbersome, inefficient, and poses certain safety risks. Summary of the Invention

[0003] In order to solve or partially solve the above-mentioned technical problems, this application provides an internal pipeline construction platform.

[0004] This application provides a pipeline internal construction platform, including several arc-shaped frames, which are arranged to form a ring frame. An elastic locking element is provided between two adjacent arc-shaped frames, and a first roller is provided on the ring frame.

[0005] A telescopic mechanism is located inside the annular frame, and both ends of the telescopic mechanism are connected to the ends of the arc-shaped frame;

[0006] A self-balancing mechanism is located at the end of the telescopic mechanism away from the top of the pipe.

[0007] Optionally, the annular frame includes an outer annular frame and an inner annular frame, and an annular working cavity is formed between the outer annular frame and the inner annular frame;

[0008] A first ladder is provided on the inner ring frame located in the upper half, and a second ladder is provided on the outer ring frame located in the lower half.

[0009] Optionally, the elastic locking element includes an inner sleeve, a first elastic element, a clamping sleeve, and a nut;

[0010] The inner sleeve is provided with a stop portion. The first elastic element and the clamping sleeve are both sequentially sleeved on the inner sleeve. One end of the first elastic element abuts against the stop portion, and the other end abuts against one end of the clamping sleeve. The outer peripheral wall of the inner sleeve is provided with a spiral groove along the length direction of the inner sleeve. The inner wall of the clamping sleeve is provided with an embedding hole. The embedding hole penetrates the clamping sleeve and a ball is embedded in the embedding hole. The nut is screwed onto the outer wall of the clamping sleeve. When the nut covers the embedding hole, the ball engages with the spiral groove.

[0011] Optionally, one end of each of the two adjacent arc-shaped frames facing each other is provided with a support sleeve, and the support sleeve is sleeved with the end of the inner sleeve.

[0012] Optionally, the telescopic mechanism includes a connecting frame and a telescopic frame;

[0013] The telescopic frame is provided in two parts, each telescopic frame including an inner telescopic frame and an outer telescopic frame. The two inner telescopic frames are respectively arranged on a set of opposite side end caps of the connecting frame, and the telescopic directions of the two telescopic frames are located in the same straight line. The outer telescopic frame is slidably arranged inside the inner telescopic frame.

[0014] Optionally, the inner wall of the telescopic inner frame has a gear, and the outer wall of the telescopic outer frame has a rack, with the rack meshing with the gear.

[0015] Optionally, the telescopic inner frame is provided with a locking mechanism for locking the sliding of the telescopic outer frame.

[0016] Optionally, the self-balancing mechanism is disposed on the telescopic outer frame of the telescopic frame.

[0017] Optionally, the self-balancing mechanism includes a first hydraulic cylinder, a first piston rod, a second hydraulic cylinder, and a second piston rod;

[0018] The first piston rod is slidably disposed in the first hydraulic cylinder, and the two ends of the first piston rod extend out of a set of opposing side end caps of the first hydraulic cylinder respectively. The first piston in the first piston rod divides the first hydraulic cylinder into two first chambers. The two ends of the first piston rod are provided with counterweights.

[0019] The second piston rod is slidably disposed in the second hydraulic cylinder, and the two ends of the second piston rod extend out of a set of opposing side end caps of the second hydraulic cylinder respectively. The second piston in the second piston rod divides the second hydraulic cylinder into two second chambers; baffles are provided at both ends of the second piston rod.

[0020] The two first cavities and the two second cavities are arranged at intervals along the left and right sides of the pipe. The first cavity that is relatively closer to the left side of the pipe is connected to the second cavity that is relatively closer to the right side of the pipe. The first cavity that is relatively closer to the right side of the pipe is connected to the second cavity that is relatively closer to the left side of the pipe.

[0021] Optionally, a second elastic element is sleeved on the second piston rod; one end of the second elastic element abuts against the outer end cap wall of the second hydraulic cylinder, and the other end abuts against one side of the baffle.

[0022] The technical solution provided in this application has the following advantages compared with the prior art:

[0023] The pipeline internal construction platform provided in this application can avoid the need for construction workers to work at heights by building steel pipe frames during the installation process, ensuring safety during construction. Moreover, the assembly and disassembly process of the entire ring frame is relatively simple, without the need for repeated construction and fixing of steel pipes as required by steel pipe frames, thus improving construction efficiency. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the internal construction platform of the pipeline described in the embodiments of this application;

[0027] Figure 2 This is a schematic diagram of the arc-shaped frame structure located above the pipe in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the arc-shaped frame structure located below the pipe in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the telescopic inner frame and telescopic outer frame in their non-telescopic states as described in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the telescopic inner frame and telescopic outer frame in their telescopic states as described in the embodiments of this application;

[0031] Figure 6 This is a cross-sectional view of the elastic locking component structure described in the embodiments of this application;

[0032] Figure 7 This is a schematic diagram of the installation state structure of the telescopic mechanism described in the embodiments of this application;

[0033] Figure 8 This is a schematic diagram of the structure when the arc-shaped frame under the pipe is installed in an embodiment of this application;

[0034] Figure 9 for Figure 8 A schematic diagram of the structure after rotating upwards as shown;

[0035] Figure 10 This is a schematic diagram of the ring frame after it has been fully installed, as described in the embodiments of this application.

[0036] Figure 11 This is a schematic diagram of the self-balancing structure described in the embodiments of this application;

[0037] Figure 12 This is a schematic diagram of the connection between the self-balancing mechanism and the ring frame described in the embodiment of this application.

[0038] in,

[0039] 10. Arc-shaped frame; 11. First roller; 12. Outer ring frame; 13. Inner ring frame; 14. First ladder; 15. Second ladder; 16. Top rod contact; 20. Connecting frame; 21. Telescopic inner frame; 210. Gear; 22. Telescopic outer frame; 220. Second roller; 221. Rack; 222. Locking mechanism; 223. Support leg; 3. Self-balancing mechanism; 30. First cavity; 31. First piston rod; 32. Counterweight; 33. Second elastic element; 34. First connecting pipe; 35. Second connecting pipe; 36. Second cavity; 37. Second piston rod; 38. Baffle; 40. Inner sleeve; 41. Stop; 410. Spiral groove; 42. First elastic element; 43. Pressing sleeve; 430. Embedding hole; 44. Nut; 45. Ball bearing; 5. Support sleeve; 6. Pipe. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0049] Reference Figure 1As shown, the pipeline construction platform provided in this embodiment includes several arc-shaped frames 10, which are arranged to form a ring frame. An elastic locking member is provided between two adjacent arc-shaped frames 10. A first roller 11 is provided on the ring frame. A telescopic mechanism is located inside the ring frame, and the two ends of the telescopic mechanism are connected to the ends of the arc-shaped frames 10. A self-balancing mechanism 3 is provided on the telescopic mechanism at one end away from the top of the pipeline 6.

[0050] The ring frame is formed by multiple arc-shaped frames 10. In this embodiment, the number of arc-shaped frames 10 is four.

[0051] The first roller 11 is specifically set on the outer peripheral wall of each arc frame 10, and is used to realize the rotation of the arc frame 10 around the inner wall of the pipe 6 during the assembly of the ring frame; the telescopic mechanism is located inside the ring frame, and its two ends are respectively connected to the ends of the arc frame 10 to provide a certain support for the ring frame, thereby ensuring the overall structural strength of the ring frame; the self-balancing mechanism 3 can ensure that the left and right sides of the ring frame can still maintain the balance of the ring frame relative to the pipe 6 when subjected to the climbing force of the construction personnel, so that the construction personnel can normally carry out construction on the top and higher positions on both sides of the pipe 6 with the assistance of the ring frame.

[0052] Reference Figures 7 to 10 As shown, during installation, the telescopic mechanism is first installed so that both ends of the telescopic mechanism abut against the inner wall of the pipe 6. Then, two arc-shaped frames 10 are installed at the bottom of the pipe 6. The two arc-shaped frames 10 are locked together by elastic locking components. The ends of the arc-shaped frames 10 and the telescopic mechanism are also elastically locked together by elastic locking components. Then, the entire telescopic mechanism and the two arc-shaped frames 10 are rotated so that the two arc-shaped frames 10 are located above or partially above the pipe 6. Then, the other two arc-shaped frames 10 are installed to finally assemble the ring frame.

[0053] The installation of the entire ring frame can avoid the high-altitude work of construction workers in building steel pipe frames, ensuring safety during construction. Moreover, the assembly and disassembly of the entire ring frame is relatively simple, without the need for repeated construction and fixing of steel pipes as with steel pipe frames, thus improving construction efficiency.

[0054] Reference Figure 2 and Figure 3 As shown, in some further embodiments, the annular frame includes an outer annular frame 12 and an inner annular frame 13, with an annular working cavity formed between the outer annular frame 12 and the inner annular frame 13; a first ladder 14 is provided on the inner annular frame 13 located in the upper half, and a second ladder 15 is provided on the outer annular frame 12 located in the lower half.

[0055] The ring frame has two layers: an outer ring frame 12 and an inner ring frame 13. The inner ring frame 13 is located inside the outer ring frame 12, and the two are connected by a connecting rod. The double-layer arrangement of the inner ring frame 13 and the outer ring frame 12 can effectively increase the structural strength of the entire ring frame.

[0056] An annular working cavity is formed between the outer ring frame 12 and the inner ring frame 13. Specifically, when construction workers need to work on the inner wall of the pipe 6, they can first climb to the second ladder 15 and then climb to the first ladder 14 to carry out construction on the inner wall of the pipe 6. In particular, the second ladder 15 is set on the outer ring frame 12, which is located in the lower half, while the first ladder 14 is set on the inner ring frame 13, which is located in the upper half. When climbing the second ladder 15, the direction of the worker's weight is exactly pointing to the outer ring frame 12, and when climbing the first ladder 14, the direction of the worker's weight is exactly pointing to the inner ring frame 13, thus ensuring the safety of the construction workers.

[0057] Reference Figure 6 As shown, in some further embodiments, the elastic locking component includes an inner sleeve 40, a first elastic element 42, a clamping sleeve 43, and a nut 44. The inner sleeve 40 is provided with a stop portion 41. The first elastic element 42 and the clamping sleeve 43 are sequentially sleeved on the inner sleeve 40. One end of the first elastic element 42 abuts against the stop portion 41, and the other end abuts against one end of the clamping sleeve 43. The outer peripheral wall of the inner sleeve 40 is provided with a spiral groove 410 along the length direction of the inner sleeve 40. The inner wall of the clamping sleeve is provided with an embedding hole 430, which penetrates the clamping sleeve. A ball is embedded in the embedding hole 430. The nut 44 is screwed onto the outer wall of the clamping sleeve 43. When the nut 44 covers the embedding hole 430, the ball engages with the spiral groove 410.

[0058] The inner sleeve 40 has a tubular structure and a certain length. The stop part 41 can be integrally formed with the inner sleeve 40. The stop part 41 can be a disc-shaped structure and is concentrically arranged with the inner sleeve 40.

[0059] In this embodiment, the first elastic element 42 can be a spring. When the entire elastic locking component is installed, the nut 44 is rotated first, so that the nut 44 covers the embedded hole 430, and at the same time, the ball 45 set in the embedded hole 430 is pressed into the spiral groove 410. At this time, the clamping sleeve 43 is rotated, and the clamping sleeve 43 can drive the ball to cooperate with the spiral groove 410 and abut against the first elastic element 42, so that more space is reserved at both ends of the inner sleeve 40 for the arc frame 10 or the telescopic mechanism to be sleeved. After the sleeve is completed, the nut 44 is rotated again, so that... The insertion hole 430 is no longer covered by the inner wall of the nut 44. At this time, the ball 45 no longer engages with the spiral groove 410. The compressed second elastic element 33 will abut against the movement of the clamping sleeve 43. Therefore, when the elastic locking element is set between the two arc-shaped frames 10, the second elastic element 33 will cause the two arc-shaped frames 10 to have a mutual abutting force. However, when the four arc-shaped frames 10 are arranged to form a ring frame, a closed loop is formed between the arc-shaped frames 10. At this time, the elastic locking element will make the connection of the four arc-shaped frames 10 stronger, thereby ensuring the structural connection strength of the entire ring frame.

[0060] In some further embodiments, one end of each of the two adjacent arc-shaped frames 10 facing each other is provided with a support sleeve 5, which is sleeved and fitted with the end of the inner sleeve 40.

[0061] The end of the arc frame 10 is provided with a support sleeve 5. During the assembly of the ring frame, the support sleeve 5 is fitted onto the end of the inner sleeve 40.

[0062] Reference Figure 4 and Figure 5 As shown, in some further embodiments, the telescopic mechanism includes a connecting frame 20 and a telescopic frame; there are two telescopic frames, each including an inner telescopic frame 21 and an outer telescopic frame 22. The two inner telescopic frames 21 are respectively disposed on a set of opposite side end caps of the connecting frame 20, and the telescopic directions of the two telescopic frames are located in the same straight line; the outer telescopic frame 22 is slidably disposed inside the inner telescopic frame 21.

[0063] The telescopic mechanism includes a connecting frame 20 and a telescopic frame. The telescopic frame includes a telescopic inner frame 21 and a telescopic outer frame 22. The telescopic inner frame 21 is mounted on the connecting frame 20. The telescopic inner frame 21 is relatively larger than the telescopic outer frame 22, so that the telescopic outer frame 22 can be slidably fitted inside the telescopic inner frame 21. Specifically, the telescopic inner frame 21 and the telescopic outer frame 22 can be telescopically extended and retracted by a slide rail.

[0064] The telescopic mechanism can be adjusted according to the specific size of the pipe 6, thus making it suitable for pipes 6 of different sizes.

[0065] In some further embodiments, a gear 210 is provided on the inner wall of the telescopic inner frame 21, and a rack 221 is provided on the outer wall of the telescopic outer frame 22, with the rack 221 meshing with the gear 210.

[0066] The telescopic outer frame 22 is telescopic relative to the telescopic inner frame 21 through automated control. Specifically, in some embodiments, a gear 210 can be set on the telescopic inner frame 21, and a rack 221 can be set on the telescopic outer frame 22. The rack 221 and the gear 210 mesh with each other, and the gear 210 is driven to rotate by a motor, thereby realizing the adjustment of the telescopic mechanism.

[0067] In some further embodiments, the telescopic inner frame 21 is provided with a locking mechanism 222 for locking the sliding of the telescopic outer frame 22.

[0068] To further ensure the stability of the telescopic mechanism, a locking mechanism 222 is provided on the telescopic inner frame 21 to lock the telescopic outer frame 22. In some embodiments, the locking mechanism 222 can be an automatically controlled electromagnet or a manually controlled pin structure.

[0069] The telescopic outer frame 22 is provided with a support leg 223 at the end away from the telescopic inner frame 21. After installation, the support leg 223 abuts against the top and bottom inner walls of the pipe 6 to fix the entire construction platform.

[0070] The telescopic outer frame 22 is also provided with a second roller 220 at the end away from the telescopic inner frame 21. When the telescopic mechanism is installed, the second roller 220 can abut against the inner wall of the pipe 6. As the telescopic mechanism gradually extends, it is easier for the telescopic mechanism to rise to the position of the diameter in the pipe 6, so as to facilitate the installation of the arc frame 10.

[0071] The telescopic mechanism is also equipped with a support sleeve 5, which is used to achieve elastic locking between the telescopic outer frame 22 and the ring frame.

[0072] In some further embodiments, the self-balancing mechanism 3 is disposed on the telescopic outer frame 22 of the telescopic frame.

[0073] The self-balancing mechanism 3 is installed on the telescopic outer frame 22 of the telescopic frame. The closer the self-balancing mechanism 3 is to the bottom of the pipe 6, the lower the center of gravity of the entire construction platform, and the more stable the entire ring frame becomes.

[0074] Reference Figures 11 to 12 As shown, in some further embodiments, the self-balancing mechanism 3 includes a first hydraulic cylinder, a first piston rod 31, a second hydraulic cylinder, and a second piston rod 37;

[0075] The first piston rod 31 is slidably disposed in the first hydraulic cylinder. Both ends of the first piston rod 31 extend out of a set of opposing side end caps of the first hydraulic cylinder. The first piston in the first piston rod 31 divides the first hydraulic cylinder into two first cavities 30. Counterweights 32 are provided at both ends of the first piston rod 31. The second piston rod 37 is slidably disposed in the second hydraulic cylinder. Both ends of the second piston rod 37 extend out of a set of opposing side end caps of the second hydraulic cylinder. The second piston in the second piston rod 37 divides the second hydraulic cylinder into two second cavities 36. Baffles 38 are provided at both ends of the second piston rod 37. The two first cavities 30 and the two second cavities 36 are spaced apart along the left and right sides of the pipe 6. One of the two first cavities 30 relatively closer to the left side of the pipe 6 communicates with one of the two second cavities 36 relatively closer to the right side of the pipe 6. The one of the two first cavities 30 relatively closer to the right side of the pipe 6 communicates with one of the two second cavities 36 relatively closer to the left side of the pipe 6.

[0076] Specifically, the first cavity 30 located on the right side and the second cavity 36 located on the left side are connected by a first connecting pipe 34, and the first cavity 30 located on the left side and the second cavity 36 located on the right side are connected by a second connecting pipe 35.

[0077] For example, when a construction worker climbs onto the arc-shaped frame 10 on the right side of the pipe 6, the arc-shaped frame 10 on the right side of the ring frame will tend to rotate clockwise due to the worker's weight. The top rod contact 16 on the arc-shaped frame 10 abuts against the right side of the right baffle 38 of the second hydraulic cylinder, thereby pushing the second piston rod 37 to move to the left. The hydraulic pressure in the second cavity 36 on the left side of the second hydraulic cylinder acts on the first cavity 30 on the right side. At this time, the first piston rod 31 moves to the left, causing the counterweights 32 on both sides to move to the left, so that the center of gravity of the self-balancing mechanism 3 shifts to the left. The bottom support leg 223 is used as the fulcrum to balance the weight of the construction worker on the arc-shaped frame 10 on the right side of the ring frame, thereby ensuring the balance of the ring frame.

[0078] When construction workers climb onto the arc-shaped frame 10 on the left side of the pipe 6, the center of gravity of the self-balancing mechanism 3 shifts to the right, using the bottom support leg 223 as a fulcrum to balance the weight of the construction workers on the arc-shaped frame 10 on the left side of the ring frame.

[0079] In the initial state, the distances between the top rod contact 16 on the arc frame and their respective baffles 38 are equal.

[0080] It should be noted that the self-balancing mechanism 3 is only installed on the telescopic mechanism after the telescopic mechanism and the ring frame have been finally installed.

[0081] In some further embodiments, a second elastic member 33 is sleeved on the second piston rod 37; one end of the second elastic member 33 abuts against the outer end cap wall of the second hydraulic cylinder, and the other end abuts against one side of the baffle 38.

[0082] Under the action of the second elastic element 33, after the construction workers get off the ring frame, the two second chambers 36 in the second hydraulic cylinder can be restored to balance more quickly.

[0083] In some other embodiments, the second elastic element 33 may be a spring.

[0084] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pipeline internal construction platform, characterized in that, include; A plurality of arc-shaped frames (10) are arranged to form a ring frame, and an elastic locking element is provided between two adjacent arc-shaped frames (10). A first roller (11) is provided on the ring frame. A telescopic mechanism is located inside the annular frame, and the two ends of the telescopic mechanism are connected to the ends of the arc-shaped frame (10); A self-balancing mechanism (3) is provided on the telescopic mechanism at one end away from the top of the pipe (6); The annular frame includes an outer annular frame (12) and an inner annular frame (13), and an annular working cavity is formed between the outer annular frame (12) and the inner annular frame (13); The telescopic mechanism includes a connecting frame (20) and a telescopic frame; The telescopic frame is provided in two parts. The telescopic frame includes a telescopic inner frame (21) and a telescopic outer frame (22). The two telescopic inner frames (21) are respectively arranged on a set of opposing side end caps of the connecting frame (20). The telescopic directions of the two telescopic frames are located in the same straight line. The telescopic outer frame (22) is slidably arranged inside the telescopic inner frame (21).

2. The pipeline internal construction platform according to claim 1, characterized in that, A first ladder (14) is provided on the inner ring frame (13) located in the upper half, and a second ladder (15) is provided on the outer ring frame (12) located in the lower half.

3. The pipeline internal construction platform according to claim 1, characterized in that, The elastic locking component includes an inner sleeve (40), a first elastic component (42), a clamping sleeve (43), and a nut (44); The inner sleeve (40) is provided with a stop (41). The first elastic element (42) and the pressing sleeve (43) are sequentially sleeved on the inner sleeve (40). One end of the first elastic element (42) abuts against the stop (41), and the other end abuts against one end of the pressing sleeve (43). The outer peripheral wall of the inner sleeve (40) is provided with a spiral groove (410) along the length direction of the inner sleeve (40). The inner wall of the pressing sleeve is provided with an embedding hole (430). The embedding hole (430) penetrates the pressing sleeve and a ball (45) is embedded in the embedding hole (430). The nut (44) is screwed onto the outer wall of the pressing sleeve (43). When the nut (44) covers the embedding hole (430), the ball (45) cooperates with the spiral groove (410).

4. The pipeline internal construction platform according to claim 3, characterized in that, One end of each of the two adjacent arc-shaped frames (10) facing each other is provided with a support sleeve (5), and the support sleeve (5) is sleeved and fitted with the end of the inner sleeve (40).

5. The pipeline internal construction platform according to claim 1, characterized in that, The telescopic inner frame (21) has a gear (210) on its inner wall, and the telescopic outer frame (22) has a rack (221) on its outer wall, and the rack (221) meshes with the gear (210).

6. The pipeline internal construction platform according to claim 1, characterized in that, The telescopic inner frame (21) is provided with a locking mechanism (222) for locking the sliding of the telescopic outer frame (22).

7. The pipeline internal construction platform according to claim 1, characterized in that, The self-balancing mechanism (3) is installed on the telescopic outer frame (22) of the telescopic frame.

8. The pipeline internal construction platform according to claim 7, characterized in that, The self-balancing mechanism (3) includes a first hydraulic cylinder, a first piston rod (31), a second hydraulic cylinder, and a second piston rod (37). The first piston rod (31) is slidably disposed in the first hydraulic cylinder. The two ends of the first piston rod (31) extend out of a set of opposing side end caps of the first hydraulic cylinder. The first piston in the first piston rod (31) divides the first hydraulic cylinder into two first chambers (30). The two ends of the first piston rod (31) are provided with counterweights (32). The second piston rod (37) is slidably disposed in the second hydraulic cylinder. The two ends of the second piston rod (37) extend out of a set of opposing side end caps of the second hydraulic cylinder. The second piston in the second piston rod (37) divides the second hydraulic cylinder into two second chambers (36). The two ends of the second piston rod (37) are provided with baffles (38). The two first cavities (30) and the two second cavities (36) are arranged at intervals along the left and right sides of the pipe (6). The first cavity (30) that is relatively close to the left side of the pipe (6) is connected to the second cavity (36) that is relatively close to the right side of the pipe (6). The first cavity (30) that is relatively close to the right side of the pipe (6) is connected to the second cavity (36) that is relatively close to the left side of the pipe (6).

9. The pipeline internal construction platform according to claim 8, characterized in that, A second elastic element (33) is sleeved on the second piston rod (37); one end of the second elastic element (33) abuts against the outer end cap wall of the second hydraulic cylinder, and the other end abuts against one side of the baffle (38).

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