Core tube internal climbing tower crane bottom self-climbing closed platform system

Abstract

The utility model discloses a self-climbing closed platform system at the bottom of a core tube internal climbing tower crane. The self-climbing closed platform system comprises embedded bolts, connecting pieces, a frame body platform, a guide rail and a driving device, the embedded bolt is embedded in the cylinder wall of the core cylinder; the connecting piece comprises a movable piece and a fixed piece, and the movable piece comprises a connecting plate and two wedge-shaped plates; the guide rails are symmetrically arranged in the core tube; the frame body platform comprises a construction platform and two lower frame bodies, the two lower frame bodies are arranged on the two sides of the lower surface of the construction platform correspondingly, and the lower frame bodies are installed on the guide rails in a sliding mode; the driving device is connected with the guide rail and the lower frame body. The embedded bolt is embedded in the cylinder wall of the core cylinder, the connecting plate is connected with the embedded bolt through the nut, the two wedge-shaped plates are arranged on the two sides of the connecting plate respectively, the fixing piece is fixed to the guide rail, the fixing piece is connected with the two wedge-shaped plates in a nested mode, and therefore the guide rail and the embedded bolt can be installed, and only the fixing piece needs to be detached from the two wedge-shaped plates in the detaching process. The guide rails and the embedded bolts are convenient to mount and dismount, and the construction efficiency can be improved.

Description

Technical Field

[0001] The present application belongs to the field of building construction technology, and specifically relates to a self-climbing closed platform system at the bottom of a climbing tower crane in a core tube. Background Art

[0002] Super high-rise buildings are generally constructed using a core tube structure. The construction of super high-rise buildings often involves the use of climbing tower cranes inside the core tube.

[0003] For the core tube equipped with an internal climbing boom tower crane, because the standard section of the tower crane passes through the upper and lower platforms of the entire climbing formwork system, a tower crane opening is reserved on the upper platform during the design of the climbing formwork system, while the lower platform is cancelled. Therefore, the core tube equipped with an internal climbing boom tower crane cannot be fully enclosed, posing safety hazards such as being hit by objects and falling objects from heights.

[0004] In the prior art, some people have proposed to use the original tapered hole to install the embedded scraper seat on the core tube structure, install the guide rail on the embedded part hanger, connect the hydraulic cylinder to the embedded part hanger, and alternately lift the guide rail and the safety protection platform through the hydraulic cylinder, so as to realize the lifting and lowering movement of the safety protection platform; however, when changing to different height positions, it is necessary to remove the guide rail from the embedded part hanger and install the guide rail on a higher embedded part hanger. The guide rail in this solution is fixed on the embedded part hanger, which is not convenient for the disassembly and installation of the guide rail and the embedded parts, and therefore reduces the construction efficiency. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the guide rail in the solution is fixed on the embedded part bracket, which makes it inconvenient to disassemble and install the guide rail and the embedded parts and reduces the construction efficiency, the present application provides a self-climbing closed platform system at the bottom of the climbing tower crane in the core tube.

[0006] The present application provides a self-climbing closed platform system at the bottom of a core tube climbing tower crane, comprising embedded bolts, connectors, a frame platform, guide rails and a drive device, wherein:

[0007] The embedded bolts are embedded in the wall of the core tube;

[0008] The connecting member includes a movable member and a fixed member, and the movable member includes a connecting plate and two wedge plates; the connecting plate is connected to the embedded bolts through nuts; the two wedge plates are respectively arranged on both sides of the connecting plate, and one end of the wedge plate abuts against the wall of the core tube and is inclined toward the center of the connecting plate; the fixed member is nested and connected with the two wedge plates, and the fixed member is fixed to the guide rail;

[0009] The guide rails are symmetrically arranged in the core tube along the central axis of the core tube;

[0010] The frame platform includes a construction platform and two lower frames, the two lower frames are respectively arranged on both sides of the lower surface of the construction platform, and the lower frames are slidably mounted on the guide rails;

[0011] The driving device is installed on the guide rail and connected to the lower frame, and is used to drive the lower frame to slide along the guide rail to drive the construction platform to move in a vertical direction.

[0012] Preferably, the fixing member is provided with a hollow portion, and the top and bottom of the hollow portion are respectively provided with clamping inclined surfaces, the clamping inclined surfaces are in contact with the wedge surface and the side surface of the fixing member is in contact with the wall of the core tube.

[0013] Preferably, the shape of the hollow portion is approximately a "C" shape, and the clamping slope is inclined from the inside to the outside toward the center of the hollow portion.

[0014] Preferably, the driving device includes an oil cylinder, an upper climbing box and a lower climbing box; both ends of the oil cylinder are respectively connected to the upper climbing box and the lower climbing box; the upper climbing box is connected to the lower frame; and the lower climbing box is connected to the guide rail.

[0015] Preferably, it also includes two protection components, which include vertical poles, flaps and hanging ropes; the two vertical poles are vertically arranged on both sides of the top surface of the construction platform; one end of the flap is hinged to the construction platform, and the other end is connected to the hanging rope to block the gap between the construction platform and the wall of the core tube; the end of the hanging rope away from the flap is connected to the upper part of the vertical pole.

[0016] Preferably, the protection assembly also includes a slider and a cylinder; the slider is slidably mounted on the vertical pole, and the slider is connected to an end of the suspension rope away from the flap; the cylinder is mounted on the vertical pole, and the output shaft of the cylinder is connected to the slider.

[0017] Preferably, the lower frame includes a frame body, a diagonal brace, a first support beam and a second support beam; the frame body frame is connected to the lower surface of the construction platform and is slidably mounted on the guide rail; the two ends of the diagonal brace are connected to the two diagonal corners of the frame body frame; the two ends of the first support beam are respectively connected to the diagonal brace and the corners of the frame body frame corresponding to the diagonal brace; the two ends of the second support beam are respectively connected to the top of the frame body frame and the diagonal brace, and are perpendicular to the top of the frame body frame.

[0018] Preferably, it also includes a hanging platform, a hanging inclined ladder and two hanging frames, the two ends of the hanging frame are respectively connected to the lower frame body and the hanging platform, and the hanging platform is located below the construction platform; the hanging inclined ladder is overlapped between the hanging platform and the construction platform.

[0019] Preferably, it also includes an operating platform and an operating inclined ladder, wherein the operating platform is connected to the guide rail and is located between the construction platform and the hanging frame platform; the operating inclined ladder is overlapped between the operating platform and the construction platform.

[0020] Preferably, a first protective railing is arranged around the hanging platform; and a second protective railing is arranged around the operating platform.

[0021] A self-climbing closed platform system at the bottom of a core tube climbing tower crane provided in one or more embodiments of the present application has the following technical effects:

[0022] The embedded bolts are embedded in the wall of the core tube, the connecting plate is connected to the embedded bolts by nuts, the two wedge plates are respectively arranged on both sides of the connecting plate, the fixing piece is fixed on the guide rail, and the fixing piece is nested and connected with the two wedge plates to realize the installation of the guide rail and the embedded bolts. When disassembling, it is only necessary to remove the fixing piece from the two wedge plates, which is convenient for the installation and disassembly of the guide rail and the embedded bolts and can improve the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a climbing tower crane platform system in a core tube from a main viewing angle in one or more embodiments of the present application is shown;

[0024] Figure 2 A schematic diagram of the structure of a frame platform, a guide rail and a driving device of a climbing tower crane platform system in a core tube in one or more embodiments of the present application is shown;

[0025] Figure 3 This application shows Figure 2 Middle, partial enlarged view of part A;

[0026] Figure 4 A schematic diagram of the structure of a climbing tower crane platform system in a core tube from a side view in one or more embodiments of the present application is shown;

[0027] Figure 5 This application shows Figure 4 Middle, partial enlarged view of part B.

[0028] Explanation of reference numerals: 100-core tube; 1-embedded bolt; 2-connecting piece, 21-movable piece, 211-connecting plate, 212-wedge plate, 22-fixing piece, 221-hollowing part, 2211-clamping slope; 3-frame platform, 31-construction platform, 311-first skirting board, 312-cover plate, 32-lower frame, 321-frame frame, 322-diagonal brace, 323-first support beam, 324-second support Beam; 4-guide rail; 5-driving device, 51-oil cylinder, 52-upper climbing box, 53-lower climbing box; 6-protection assembly, 61-vertical pole, 62-flap, 63-suspension rope, 64-slider, 65-cylinder; 7-hanging platform, 71-second skirting board, 72-first guardrail; 8-hanging bracket; 9-hanging inclined ladder; 10-operating platform, 101-third skirting board, 102-second guardrail; 11-operating inclined ladder. DETAILED DESCRIPTION

[0029] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] Reference Figure 1-Figure 5 As shown, the embodiment of the present application provides a self-climbing closed platform system at the bottom of a core tube climbing tower crane, including embedded bolts 1, connectors 2, a frame platform 3, guide rails 4 and a driving device 5, wherein:

[0031] The embedded bolt 1 is embedded in the wall of the core tube 100. The embedded bolt 1 can be vertically connected to an embedded plate to increase the stress area and improve the load-bearing capacity of the embedded bolt 1. The embedded plate is located on the outer wall of the core tube 100. The embedded bolt 1 can be connected to the embedded plate by nuts on the outer side of the embedded plate to tighten the embedded plate and prevent the embedded plate from falling off due to stress.

[0032] The connecting member 2 includes a movable member 21 and a fixed member 22, wherein the movable member 21 is connected to the embedded bolt 1, and the fixed member 22 is fixed to the guide rail 4, and the fixed member 22 is detachably connected to the movable member 21; specifically, Figure 3As shown, the movable part 21 includes a connecting plate 211 and two wedge plates 212; the connecting plate 211 is connected to the embedded bolt 1 by a nut; the two wedge plates 212 are respectively arranged on both sides of the connecting plate 211, one end of the wedge plate 212 abuts against the wall of the core tube 100 and is inclined toward the center of the connecting plate 211, and the other end of the wedge plate 212 is connected to the end of the connecting plate 211; the fixing part 22 is nested and connected with the two wedge plates 212. After the connecting plate 211 is connected to the embedded bolt 1 by a nut, one end of the wedge plate 212 abuts against the wall of the core tube 100 to support the connecting plate 211, so that the connection between the connecting plate 211 and the embedded bolt 1 is more stable, thereby improving the stability and reliability of the device.

[0033] The guide rail 4 is symmetrically arranged in the core tube 100 along the central axis of the core tube 100. The guide rail 4 is made of H-shaped steel. The space surrounded by the wing plate of the H-shaped steel forms a guide portion for the lower frame 32 described below to slide. To ensure good stability, two guide rails 4 should be respectively arranged on both sides of the core tube 100.

[0034] The frame platform 3 includes a construction platform 31 and two lower frames 32, the two lower frames 32 are respectively arranged on both sides of the lower surface of the construction platform 31, and the lower frames 32 are slidably mounted on the guide rail 4;

[0035] The driving device 5 is installed on the guide rails 4 , each of the guide rails 4 is provided with the driving device 5 , and the driving device 5 is connected to the lower frame 32 , and is used to drive the lower frame 32 to slide along the guide rails 4 , so as to drive the construction platform 31 to move in the vertical direction.

[0036] The core tube climbing tower crane platform system provided in the embodiment of the present application is embedded in the wall of the core tube 100 through the embedded bolts 1, the connecting plate 211 is connected to the embedded bolts 1 through nuts, the two wedge plates 212 are respectively arranged on both sides of the connecting plate 211, the fixing part 22 is fixed on the guide rail 4, and the fixing part 22 is nested and connected with the two wedge plates 212 to realize the installation of the guide rail 4 and the embedded bolts 1. When disassembling, it is only necessary to remove the fixing part 22 from the movable part 21, which is convenient for the installation and disassembly of the guide rail 4 and the embedded bolts 1 and can improve the construction efficiency.

[0037] In some embodiments, Figure 3As shown, the fixing member 22 is provided with a hollow portion 221, and the hollow portion 221 is nested on the two wedge plates 212. The shape of the hollow portion 221 is approximately "C"-shaped. The top and bottom of the hollow portion 221 are respectively provided with clamping slopes 2211, and the clamping slopes 2211 are inclined from the inside to the outside toward the center of the hollow portion 221, so that the clamping slopes 2211 are in contact with the wedge surface and the side of the fixing member 22 is in contact with the wall of the core tube 100. When connecting the fixed part 22 and the movable part 21, the fixed part 22 and the guide rail 4 are moved synchronously, so that the two wedge plates 212 of the movable part 21 are inserted into the hollow part 221 of the movable part 21 from the side, and under the action of the gravity of the lower frame 32 and the construction platform 31, the hollow part 221 is engaged with the two wedge plates 212; the bottom of the hollow part 221 forms a limit on the top, limiting the vertical movement of the fixed part 22, thereby making the connection between the guide rail 4 and the embedded bolts 1 more secure, thereby improving the stability and reliability of the device.

[0038] In some embodiments, the driving device 5 includes an oil cylinder 51, an upper climbing box 52 and a lower climbing box 53; the two ends of the oil cylinder 51 are respectively connected to the upper climbing box 52 and the lower climbing box 53; the upper climbing box 52 is connected to the lower frame 32; the lower climbing box 53 is connected to the guide rail 4. Through the connection between the upper climbing box 52 and the lower climbing box 53 and the guide rail 4, the lower frame 32 moves in the vertical direction relative to the guide rail 4 under the driving action of the oil cylinder 51. The driving device 5 also includes an oil pump station and an oil pipe, etc., which provide a power source for the oil cylinder 51. The upper climbing box 52 and the lower climbing box 53 both have an automatic locking function. One of the upper climbing box 52 and the lower climbing box 53 is an anti-fall device for the other.

[0039] In some embodiments, Figure 5 As shown, the core tube inner climbing tower crane platform system further includes two protection components 6, which include a vertical pole 61, a flap 62 and a suspension rope 63; the two vertical poles 61 are vertically arranged on both sides of the top surface of the construction platform 31; one end of the flap 62 is hinged to the construction platform 31, and the other end is connected to the suspension rope 63 to block the gap between the construction platform 31 and the wall of the core tube 100; the end of the suspension rope 63 away from the flap 62 is connected to the upper part of the vertical pole 61. One end of the flap 62 is hinged to the construction platform 31, and the middle and upper part of the other end of the flap 62 is connected to the suspension rope 63, and the other end of the flap 62 rests on the inner wall of the core tube 100, so that the construction platform 31 can rise smoothly while blocking the gap between the construction platform 31 and the wall of the core tube 100, thereby improving the safety of the construction platform 31.

[0040] In some further embodiments, Figure 5As shown, the protection assembly further includes a slider 64 and a cylinder 65; the slider 64 is slidably mounted on the vertical pole 61, and the slider 64 is connected to one end of the suspension rope 63 away from the flap 62; the cylinder 65 is mounted on the vertical pole 61, and the output shaft of the cylinder 65 is connected to the slider 64. The output shaft of the cylinder 65 is connected to the slider 64, and the slider 64 is driven to slide along the vertical pole 61. When the construction platform 31 needs to be raised, the slider 64 is driven to rise a certain distance by the cylinder 65, so that the end of the flap 62 close to the wall of the core tube 100 is turned in a direction away from the wall of the core tube 100, so as to avoid the flap 62 from hitting the wall of the core tube 100 and affecting the rise of the construction platform 31, thereby improving the reliability and stability of the device.

[0041] In some embodiments, Figure 2 As shown, the lower frame 32 includes a frame body 321, a diagonal brace 322, a first support beam 323 and a second support beam 324; the cross-section of the frame body frame 321 is a quadrilateral, the frame body frame 321 is connected to the lower surface of the construction platform 31, and is slidably mounted on the guide rail 4; the two ends of the diagonal brace 322 are connected to the two diagonal corners of the frame body frame 321; the two ends of the first support beam 323 are respectively connected to the diagonal brace 322 and the corner of the frame body frame 321 relative to the diagonal brace 322; the two ends of the second support beam 324 are respectively connected to the top of the frame body frame 321 and the diagonal brace 322, and are perpendicular to the top of the frame body frame 321. The two ends of the diagonal brace 322 are connected to the two diagonal corners of the frame frame 321 to form two large triangles. Since the stability of the triangle is better than that of the quadrilateral, the stability of the frame frame 321 can be improved, thereby improving the strength of the frame frame 321; the two ends of the first support beam 323 are respectively connected to the diagonal brace 322 and the corner of the frame frame 321 corresponding to the diagonal brace 322, so that the large triangle is divided into two small triangles, thereby further improving the bearing capacity of the frame frame 321; the second support beam 324 The two ends are respectively connected to the top of the frame body frame 321 and the diagonal brace 322, so that the connection point between the second support beam 324 and the diagonal brace 322 can be against the connection section between the first support beam 323 and the diagonal brace 322, so that the first support beam 323 and the second support beam 324 rely on each other to improve stability; the second support beam 324 is perpendicular to the top of the frame body frame 321, so that the second support beam 324 is vertically arranged, thereby improving the tensile force of the lower frame 32 in the vertical direction, and improving the reliability and stability of the lower frame 32.

[0042] In a further embodiment, a first skirting board 311 is provided around the construction platform 31 to facilitate construction workers to identify the boundary of the construction platform 31 , thereby preventing construction workers from accidentally extending their feet out of the construction platform 31 and causing injuries, thereby further improving the safety of the construction platform 31 .

[0043] In some embodiments, the core tube inner climbing tower crane platform system further includes a hanger platform 7 and two hangers 8, the two ends of the hanger 8 are respectively connected to the lower frame 32 and the hanger platform 7, and the hanger platform 7 is located below the construction platform 31. By arranging the hanger platform 7 below the construction platform 31, the construction area in the vertical direction of the construction platform 31 is increased when the construction platform 31 is in a certain position, more construction personnel can be accommodated, thereby improving construction efficiency; the hanger platform 7 is connected to the lower frame 32, and the hanger platform 7 and the construction platform 31 are raised and lowered synchronously.

[0044] In a further embodiment, a second skirting board 71 is provided around the hanging platform 7 to facilitate construction workers to identify the boundary of the hanging platform 7, to avoid construction workers accidentally extending their feet out of the hanging platform 7 and causing damage, and to further improve the safety of the hanging platform 7.

[0045] In some further embodiments, the core tube inner climbing tower crane platform system further includes a hanging inclined ladder 9, and the hanging inclined ladder 9 is overlapped between the hanging platform 7 and the construction platform 31. By overlapping the hanging inclined ladder 9 between the hanging platform 7 and the construction platform 31, it is convenient for construction personnel to move between the hanging platform 7 and the construction platform 31, thereby improving the mobility of personnel between different platform layers and improving the convenience of the device.

[0046] In some embodiments, the core tube inner climbing tower crane platform system further includes an operating platform 10, which is connected to the guide rail 4 and is located between the construction platform 31 and the pylon platform 7. The operating platform 10 is arranged between the construction platform 31 and the pylon platform 7 to increase the construction area in the vertical direction when the construction platform 31 is in a certain position, and can accommodate more construction personnel, thereby improving construction efficiency.

[0047] In a further embodiment, a third skirting board 101 is provided around the operating platform 10 to facilitate construction workers to identify the boundary of the construction platform 31 , thereby preventing construction workers from accidentally extending their feet out of the operating platform 10 and causing injuries, thereby further improving the safety of the operating platform 10 .

[0048] In some further embodiments, the core tube inner climbing tower crane platform system further includes an operating inclined ladder 11, and the operating inclined ladder 11 is overlapped between the operating platform 10 and the construction platform 31. By arranging the operating inclined ladder 11 between the operating platform 10 and the construction platform 31, it is convenient for construction personnel to move between the operating platform 10 and the construction platform 31, thereby improving the mobility of personnel between different platform layers and improving the convenience of the device.

[0049] In some further embodiments, a cover plate 312 is provided on the construction platform 31 shown. The cover plate 312 is located at the opening of the operating inclined ladder 11 leading to the construction platform 31. The cover plate 312 is hinged to the construction platform 31. When the operating inclined ladder 11 is not in use, the cover plate 312 is closed to prevent construction workers from falling from the opening, thereby improving the safety of the system.

[0050] In some embodiments, the pylon platform 7 is surrounded by first guardrails 72, and the operating platform 10 is surrounded by second guardrails 102. The first guardrails 72 and the second guardrails 102 can improve the safety of the pylon platform 7 and the operating platform 10.

[0051] The working principle of the core tube climbing tower crane platform system is:

[0052] (1) Installation process: embed multiple embedded bolts 1 in the core tube 100 → install the connecting parts 2 → install the guide rails 4 → single-point hoist the lower frame 32 → install the construction platform 31, the operating platform 10 and the hanging platform 7 → install the driving device 5.

[0053] (2) Climbing process: After installing the connector 2 on the climbing layer → check before climbing → climb the frame → check after climbing → put into use.

[0054] (3) Dismantling process: thoroughly clean the construction platform 31, the operating platform 10 and the hanging platform 7 → remove the platform plates, guardrails and platform beams → dismantle the lower frame 32 as a whole and hoist it to the ground for dismantling.

[0055] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A self-climbing closed platform system at the bottom of a core tube climbing tower crane, characterized in that: It includes embedded bolts, connectors, frame platform, guide rails and drive devices, including: The embedded bolts are embedded in the wall of the core tube; The connecting member includes a movable member and a fixed member, and the movable member includes a connecting plate and two wedge plates; the connecting plate is connected to the embedded bolts through nuts; the two wedge plates are respectively arranged on both sides of the connecting plate, and one end of the wedge plate abuts against the wall of the core tube and is inclined toward the center of the connecting plate; the fixed member is nested and connected with the two wedge plates, and the fixed member is fixed to the guide rail; The guide rails are symmetrically arranged in the core tube along the central axis of the core tube; The frame platform includes a construction platform and two lower frames, the two lower frames are respectively arranged on both sides of the lower surface of the construction platform, and the lower frames are slidably installed on the guide rails; The driving device is installed on the guide rail and connected to the lower frame, and is used to drive the lower frame to slide along the guide rail to drive the construction platform to move in a vertical direction.

2. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 1 is characterized in that: The fixing piece is provided with a hollowed-out portion, and the top and the bottom of the hollowed-out portion are respectively provided with clamping inclined surfaces, the clamping inclined surfaces are fitted with the wedge plate, and the side surface of the fixing piece is fitted with the wall of the core tube.

3. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 2 is characterized in that: The shape of the hollowed-out portion is C-shaped, and the clamping inclined surface is inclined from the inside to the outside toward the center of the hollowed-out portion.

4. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 1 is characterized in that: The driving device includes an oil cylinder, an upper climbing box and a lower climbing box; the two ends of the oil cylinder are respectively connected to the upper climbing box and the lower climbing box; the upper climbing box is connected to the lower frame; and the lower climbing box is connected to the guide rail.

5. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 1 is characterized in that: It also includes two protection components, which include vertical poles, flaps and hanging ropes; the two vertical poles are vertically arranged on both sides of the top surface of the construction platform; one end of the flap is hinged to the construction platform, and the other end is connected to the hanging rope to block the gap between the construction platform and the wall of the core tube; the end of the hanging rope away from the flap is connected to the upper part of the vertical pole.

6. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 5 is characterized in that: The protection component also includes a slider and a cylinder; the slider is slidably installed on the vertical pole, and the slider is connected to the end of the suspension rope away from the flap; the cylinder is installed on the vertical pole, and the output shaft of the cylinder is connected to the slider.

7. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 1 is characterized in that: The lower frame includes a frame body, a diagonal brace, a first support beam and a second support beam; the frame body frame is connected to the lower surface of the construction platform and is slidably mounted on the guide rail; the two ends of the diagonal brace are connected to the two diagonal corners of the frame body frame; the two ends of the first support beam are respectively connected to the diagonal brace and the corners of the frame body frame corresponding to the diagonal brace; the two ends of the second support beam are respectively connected to the top of the frame body frame and the diagonal brace, and are perpendicular to the top of the frame body frame.

8. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 1 is characterized in that: It also includes a hanging platform, a hanging inclined ladder and two hanging frames, the two ends of the hanging frames are respectively connected to the lower frame body and the hanging platform, the hanging platform is located below the construction platform; the hanging inclined ladder is overlapped between the hanging platform and the construction platform.

9. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 8 is characterized in that: It also includes an operating platform and an operating inclined ladder. The operating platform is connected to the guide rail and is located between the construction platform and the hanging frame platform; the operating inclined ladder is overlapped between the operating platform and the construction platform.

10. The self-climbing closed platform system at the bottom of the core tube climbing tower crane according to claim 9, characterized in that: The first protective railings are arranged around the hanging platform; and the second protective railings are arranged around the operating platform.

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