Construction platform self-locking steel hoop structure and method of use thereof

Abstract

This invention provides a self-locking steel clamp structure for a construction platform and its usage method. The structure includes a pier column, with a self-locking steel clamp on the outside of the pier column to support the construction platform. The self-locking steel clamp includes a hollow shell with openings at both ends for the pier column to pass through. An upper compression locking mechanism and a lower compression locking mechanism are arranged opposite each other within the hollow shell. The upper compression locking mechanism is fixed to the inner top wall of the hollow shell, while the lower compression locking mechanism is movably mounted on the inner bottom wall of the hollow shell. The pier column is clamped tightly by the mutual compression of the upper and lower compression locking mechanisms. Self-locking is achieved through the interaction between the upper and lower compression locking mechanisms. Furthermore, the greater the force on the upper platform, the greater the force between the locking mechanisms, further clamping the pier column and achieving self-locking without relying on other mechanical structures.

Description

Technical Field

[0001] This invention relates to the field of cap beam construction, and in particular to a self-locking steel clamp structure for a construction platform and its usage method. Background Technology

[0002] Currently, during the construction of the cap beam, a simple support structure needs to be formed on the pier using steel clamps. The steel clamps are composed of two halves that are assembled together and use their friction to provide support for the subsequent operation platform and pouring formwork built on top.

[0003] The existing construction platforms for steel clamps mainly fall into the following categories: 1. Using scaffolding to provide an installation platform for the steel clamps. If the piers or pipe piles are too high, workers climbing up and down pose safety hazards. Installation requires specific foundation conditions; if necessary, the foundation must first be hardened and drained. Installation and dismantling consume manpower, resources, and time. 2. Using a lifting platform to serve as a movable operating platform. However, the arrangement and deployment of the vehicle requires considerable space. In areas with dense piers or when the piers are high, deployment may be impossible or insufficient in height. Furthermore, when using a lifting platform, only one side (180°) of the pier can be covered; when working on the other side, the vehicle needs to be moved and repositioned. This method has high requirements for deployment site conditions, high maintenance costs for mobile lifting platforms, a small operating range, and requires multiple moves and adjustments. 3. The main principle of the safety ladder cage is that the prefabricated ladder cage is installed using a hoisting method centered on the pier. It has internal stairs and surrounding walkways for workers to walk and move up and down. Because it is a prefabricated product, the price is relatively high, and the installation requires specific foundation conditions, including ground hardening, which increases the cost.

[0004] In summary, the current construction of steel clamps for bridge pier cap beams requires manual installation of the steel clamps at the top of the pier by construction workers. Existing construction methods and platforms have low reliability, poor economy, high safety risks, and are cumbersome and time-consuming to install and dismantle. At the same time, the installation of the support platform is limited by many site conditions such as the gap between the bridge piers and the bottom foundation. Therefore, a self-locking steel clamp structure for the construction platform and its usage method are proposed to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a self-locking steel clamp structure for a construction platform and its usage method, which solves the problems of the current steel clamp installation method for pier cap beams, which requires construction personnel to manually install the steel clamps at the top of the pier. The existing construction methods and platforms have low reliability, poor economy, high safety risks, and cumbersome and time-consuming installation and dismantling processes. At the same time, the installation of the support platform is limited by many site conditions such as the gap between the piers and the bottom foundation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a self-locking steel clamp structure for a construction platform, including a pier column. The pier column is provided with a self-locking steel clamp for supporting the construction platform. The self-locking steel clamp includes a hollow shell. Both ends of the hollow shell are provided with openings for the pier column to pass through. An upper compression locking mechanism and a lower compression locking mechanism are arranged opposite to each other in the hollow shell. The upper compression locking mechanism is fixed on the inner top wall of the hollow shell, and the lower compression locking mechanism is movably arranged on the inner bottom wall of the hollow shell. The pier column is clamped by the mutual compression of the upper compression locking mechanism and the lower compression locking mechanism. An expansion groove is provided on the outer wall of the bottom end of the hollow shell. A lower lifting lug penetrating the expansion groove is provided on the outside of the lower compression locking mechanism. An upper lifting lug is provided on the top of the supporting platform.

[0007] In a preferred embodiment, the upper compression locking mechanism includes a plurality of upper fixed abutment wedges and a plurality of upper movable locking wedges arranged in an alternating ring. The upper fixed abutment wedges are fixed on the inner top wall of the hollow shell, and the upper movable locking wedges are radially slidable on the inner top wall of the hollow shell.

[0008] The lower compression locking mechanism includes a movable chassis movably mounted on the bottom wall of the hollow shell. Multiple lower fixed abutment wedges and multiple lower movable locking wedges are arranged in an alternating ring on the movable chassis. The lower fixed abutment wedges are fixed on the movable chassis, and the lower movable locking wedges are radially slidable on the movable chassis. The movable chassis has a central opening for the pier column to pass through. The lower lifting lug is fixed outside the movable chassis and passes through the expansion groove.

[0009] The upper fixed abutment wedge and the lower movable locking wedge correspond one by one, and the lower fixed abutment wedge and the upper movable locking wedge correspond one by one.

[0010] In a preferred embodiment, both the upper movable locking wedge and the lower movable locking wedge include two symmetrically arranged inverted L-shaped limiting grooves, a sliding wedge slidably disposed between the two inverted L-shaped limiting grooves, and limiting sliders disposed on both sides of the sliding wedge and slidably connected to the two inverted L-shaped limiting grooves respectively.

[0011] In the preferred embodiment, the sliding wedge, the upper fixed abutment wedge, and the lower fixed abutment wedge are all right-angled trapezoids. The right angle of the sliding wedge faces inward, and its inner side is an arc shape adapted to the pier column. The right angles of the upper fixed abutment wedge and the lower fixed abutment wedge face outward, and their slopes are opposite to the slopes of the corresponding sliding wedges.

[0012] In a preferred embodiment, a support platform is provided on the outside of the hollow shell, and the support platform is provided with sling holes corresponding to the telescopic groove.

[0013] In a preferred embodiment, the hollow shell is provided with multiple height adjustment mechanisms on its exterior, and the support platform is mounted on the height adjustment mechanisms in a height-adjustable manner.

[0014] The height adjustment mechanism includes two extension plates symmetrically arranged on the outside of the hollow shell, a lifting screw arranged between the two extension plates, and a lifting support assembly arranged outside the lifting screw.

[0015] The support platform is provided with a lifting hole for the lifting screw to pass through, and the support platform is placed above the lifting support assembly.

[0016] In a preferred embodiment, the lifting screw is provided with a vertical sliding groove on its exterior and a lifting lug on its top.

[0017] The lifting support assembly includes a lifting sleeve that is movably fitted outside the lifting screw. The top of the lifting sleeve is provided with a support plate for placing the support platform. The inner wall surfaces of the lifting sleeve and the support plate are provided with vertical sliders that are slidably connected to vertical slide grooves. The bottom end of the lifting sleeve is rotatably provided with a lifting threaded shaft that is threadedly connected to the lifting screw. The outside of the lifting sleeve is provided with a fixed platform. The bottom of the fixed platform is provided with a drive motor. The output shaft of the drive motor is provided with a transmission gear. The outside of the lifting threaded shaft is provided with transmission teeth that mesh with the transmission gear.

[0018] The bottom end of the lifting sleeve is provided with a T-shaped connecting groove, and the top end of the lifting threaded shaft is provided with a T-shaped connecting ring that matches the connecting groove. The T-shaped connecting ring is slidably connected to the connecting groove.

[0019] In a preferred embodiment, a fastening component is further provided between the lower lifting lug and the support platform. The fastening component includes a fastening frame fitted outside the lower lifting lug. The top of the fastening frame is provided with a fastening screw that can pass through the sling hole. A fastening nut is installed on the external thread of the fastening screw, and the fastening nut contacts the top surface of the support platform.

[0020] In a preferred embodiment, an optical grating ruler is embedded in the side of the upper fixed contact wedge and the lower fixed contact wedge near the sliding wedge, and a reading head corresponding to the optical grating ruler is provided at the end of the sliding wedge.

[0021] A pressure sensor is embedded in the inner side of the sliding wedge.

[0022] The method includes:

[0023] S1. Hook the crane hook onto the upper and lower lifting lugs respectively. At this time, the lifting device of the lower lifting lug is temporarily not under force, and the self-locking steel clamp is lifted only through the upper lifting lug.

[0024] S2. Hoist the self-locking steel clamp onto the pier above the construction platform to be erected, and lower the self-locking steel clamp so that the pier passes through the self-locking steel clamp and is lowered to the designated position.

[0025] S3. Then tighten the lower lifting lug and release the upper lifting lug. Under the action of gravity, the hollow shell will drive the upper compression locking mechanism to press down the lower compression locking mechanism. The lower compression locking mechanism and the upper compression locking mechanism will squeeze and hold the pier column together to fix it.

[0026] S4. During dismantling, hook the crane hook onto the upper lifting lug and lift. During the lifting process, the upper compression locking mechanism separates from the lower compression locking mechanism, and the lower compression locking mechanism falls back to the bottom of the hollow shell. The self-locking steel clamp is then lifted as a whole and lowered to the ground.

[0027] This invention provides a self-locking steel clamp structure and method for a construction platform. Self-locking is achieved through the interaction between the upper and lower compression locking mechanisms. Furthermore, as the force on the upper platform increases, the weight on the upper compression locking mechanism also increases, leading to greater forces between the locking mechanisms and further clamping the pier. This achieves self-locking without relying on other mechanical structures from start to finish. The platform boasts high reliability, wide applicability, requires no site hardening or foundation improvement, has no site requirements, is highly efficient in installation and dismantling, is reusable, has low operating costs, and saves manpower and machinery. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] Figure 1 This is a structural diagram of the connection between the self-locking steel clamp and the pier column of the present invention;

[0030] Figure 2 This is a cross-sectional view of the self-locking steel clamp structure of the present invention;

[0031] Figure 3 This is a structural diagram of the upper part of the hollow shell in this invention;

[0032] Figure 4 This is a structural diagram of the lower part of the hollow shell in this invention;

[0033] Figure 5 This is a cross-sectional view of the upper structure of the hollow shell in this invention;

[0034] Figure 6 This is a structural diagram of the upper compression locking mechanism of the present invention;

[0035] Figure 7 This is a structural diagram of the lower compression locking mechanism of the present invention;

[0036] Figure 8 This is a diagram of the compression structure of the upper fixed abutment wedge block and the lower movable locking wedge block of the present invention;

[0037] Figure 9 This is a diagram of the compression structure between the upper movable locking wedge and the lower fixed abutting wedge of the present invention;

[0038] Figure 10 This is a structural diagram showing the connection between the height adjustment mechanism and the support platform of the present invention;

[0039] Figure 11 This is a structural diagram of the height adjustment mechanism of the present invention;

[0040] Figure 12 This is a cross-sectional view of the lifting support assembly structure of the present invention;

[0041] Figure 13 This is a structural diagram of the supporting platform of the present invention;

[0042] Figure 14 This is a structural diagram of the fastening component of the present invention;

[0043] In the diagram: Pier 1; Self-locking steel clamp 2; Hollow shell 21; Expansion groove 210; Upper compression locking mechanism 22; Upper fixed contact wedge 220; Upper movable locking wedge 221; Lower compression locking mechanism 23; Movable chassis 230; Lower fixed contact wedge 231; Lower movable locking wedge 232; Inverted L-shaped limiting slide 2321; Sliding wedge 2322; Limiting slider 2323; Lower lifting lug 233; Support platform 24; Sling hole 240; Lifting hole 241; Lifting lug 242; Upper lug 25; Pressure sensor 26; Grating ruler 27; Reading head 28; Height adjustment mechanism 3; Extension plate 31; Lifting screw 32; Lifting support assembly 33; Support plate 331; Vertical slider 332; Lifting threaded shaft 333; T-shaped connecting ring 334; Fixed platform 335; Drive motor 336; Transmission gear 337; Fastening component 4; Fastening frame 401; Fastening screw 402; Fastening nut 403. Detailed Implementation

[0044] Example 1

[0045] like Figure 1-7As shown, a self-locking steel clamp structure for a construction platform includes a pier 1. A self-locking steel clamp 2 for supporting the construction platform is provided on the outside of the pier 1. The self-locking steel clamp 2 includes a hollow shell 21. Openings for the pier 1 to pass through are provided at both ends of the hollow shell 21. An upper compression locking mechanism 22 and a lower compression locking mechanism 23 are arranged opposite each other within the hollow shell 21. The upper compression locking mechanism 22 is fixed to the inner top wall of the hollow shell 21, and the lower compression locking mechanism 23 is movably arranged on the inner bottom wall of the hollow shell 21. The pier 1 is clamped by the mutual compression of the upper compression locking mechanism 22 and the lower compression locking mechanism 23. A bottom outer wall surface of the hollow shell 21 is provided with... The lower compression locking mechanism 23 is fixedly provided with a lower lifting lug 233 that passes through the telescopic groove 210. In this embodiment, there are two telescopic grooves 210, which are symmetrically arranged on the outer wall of the hollow shell 21. The number of lower lifting lugs 233 is adapted to the number of telescopic grooves 210. By extending and retracting the lower lifting lugs 233 in the telescopic groove 210, a limiting function can be played to prevent the lower compression locking mechanism 23 from rotating unnecessarily, which would cause the upper compression locking mechanism 22 and the lower compression locking mechanism 23 to be misaligned. The top of the support platform 24 is fixedly provided with an upper lifting lug 25, and there are two upper lifting lugs 25.

[0046] In use, the self-locking steel clamp 2 can be lifted as a whole by the upper lifting lug 25 and fitted onto the outside of the pier column 1. Then, by lifting the lower lifting lug 233 and loosening the upper lifting lug 25, the hollow shell 21, along with the upper compression locking mechanism 22, descends under the action of gravity and squeezes the lower compression locking mechanism 23 to clamp the pier column 1.

[0047] In a preferred embodiment, the upper compression locking mechanism 22 includes a plurality of upper fixed abutment wedges 220 and a plurality of upper movable locking wedges 221 arranged in an alternating ring. In this embodiment, there are four upper fixed abutment wedges 220 and four upper movable locking wedges 221. The upper fixed abutment wedges 220 are fixed on the inner top wall of the hollow shell 21, and the upper movable locking wedges 221 are radially slidable on the inner top wall of the hollow shell 21.

[0048] The lower compression locking mechanism 23 includes a movable base 230 movably disposed on the bottom wall of the hollow shell 21. Multiple lower fixed abutment wedges 231 and multiple lower movable locking wedges 232 are arranged in an alternating ring on the movable base 230. In this embodiment, there are four lower fixed abutment wedges 231 and four lower movable locking wedges 232. The lower fixed abutment wedges 231 are fixed on the movable base 230, and the lower movable locking wedges 232 are radially slidable on the movable base 230. The movable base 230 is provided with a central opening for the pier column 1 to pass through. The lower lifting lug 233 is fixed outside the movable base 230 and passes through the telescopic groove 210.

[0049] The upper fixed abutment wedge 220 corresponds to the lower movable locking wedge 232 one by one, and the lower fixed abutment wedge 231 corresponds to the upper movable locking wedge 221 one by one. When the lower compression locking mechanism 23 moves relative to the lower compression locking mechanism 23, the fixed abutment wedge will abut against the movable locking wedge and move radially toward the center, thereby clamping the pier 1 and achieving the locking effect.

[0050] In the preferred embodiment, both the upper movable locking wedge 221 and the lower movable locking wedge 232 include two symmetrically arranged inverted L-shaped limiting grooves 2321, a sliding wedge 2322 slidably disposed between the two inverted L-shaped limiting grooves 2321, and limiting sliders 2323 disposed on both sides of the sliding wedge 2322 and slidably connected to the two inverted L-shaped limiting grooves 2321 respectively. The sliding wedge 2322 and the limiting sliders 2323 form a T-shape. By sliding the limiting sliders 2323 in the inverted L-shaped limiting grooves 2321, a limiting function can be achieved, preventing the sliding wedge 2322 from tilting during sliding.

[0051] In the preferred embodiment, the sliding wedge 2322, the upper fixed abutment wedge 220, and the lower fixed abutment wedge 231 are all right-angled trapezoids. The right angle of the sliding wedge 2322 faces inward, and the inner side is an arc shape that matches the pier 1, which can better fit the pier 1. The right angles of the upper fixed abutment wedge 220 and the lower fixed abutment wedge 231 face outward, and the slope surface is opposite to the slope surface of the corresponding sliding wedge 2322, which makes it easier to achieve the insertion abutment effect through the contact of the slope surface when squeezing.

[0052] In a preferred embodiment, a support platform 24 is provided on the outside of the hollow shell 21. The support platform 24 is used to provide support for the installation of the construction platform. The support platform 24 is provided with sling holes 240 corresponding to the telescopic groove 210. The sling holes 240 facilitate the slings to pass through the support platform 24 to lift the lower lifting lug 233.

[0053] Example 2

[0054] Further explanation in conjunction with Example 1, such as Figure 10-13 As shown in the structure, the hollow shell 21 is provided with multiple height adjustment mechanisms 3 on its exterior. In this embodiment, there are four height adjustment mechanisms 3. The support platform 24 is raised and lowered on the height adjustment mechanism 3. In use, the height of the support platform 24 can be adjusted by the height adjustment mechanism 3, which makes it easier to adjust the support height of the construction platform more accurately.

[0055] The height adjustment mechanism 3 includes two extension plates 31 symmetrically fixed to the outside of the hollow shell 21, a lifting screw 32 disposed between the two extension plates 31, and a lifting support assembly 33 disposed outside the lifting screw 32.

[0056] The support platform 24 is provided with a lifting hole 241 through which the lifting screw 32 passes. The support platform 24 is placed above the lifting support assembly 33. The support height of the support platform 24 can be adjusted by lifting the lifting support assembly 33.

[0057] In the preferred embodiment, the lifting screw 32 is provided with a vertical slide groove 320 on the outside and a lifting lug 242 is fixed on the top, and the number of lifting lugs 242 is two.

[0058] The lifting support assembly 33 includes a lifting sleeve 330 movably fitted outside the lifting screw 32. The top of the lifting sleeve 330 is fixedly provided with a support plate 331 for placing the support platform 24. The inner wall surfaces of the lifting sleeve 330 and the support plate 331 are fixedly provided with a vertical slider 332 that is slidably connected to the vertical slide groove 320. The bottom end of the lifting sleeve 330 is rotatably provided with a lifting threaded shaft 333 that is threadedly connected to the lifting screw 32. A fixed platform 335 is provided outside the lifting sleeve 330. A drive motor 336 is fixedly provided at the bottom of the fixed platform 335. A transmission gear 337 is provided on the output shaft of the drive motor 336. A transmission tooth that meshes with the transmission gear 337 is provided outside the lifting threaded shaft 333.

[0059] The bottom end of the lifting sleeve 330 is provided with a connecting groove with a T-shaped cross section, and the top end of the lifting threaded shaft 333 is provided with a T-shaped connecting ring 334 that matches the connecting groove. The T-shaped connecting ring 334 is slidably connected to the connecting groove.

[0060] In use, the drive motor 336 drives the transmission gear 337 to rotate the lifting threaded shaft 333, thereby causing the lifting threaded shaft 333 to drive the lifting sleeve 330 to rise and fall outside the lifting screw 32, thus achieving the effect of adjusting the height of the lifting support assembly 33. In this embodiment, the fixed platform 335 has a built-in battery and communication module, and the communication module, the battery and the drive motor 336 are electrically connected to each other.

[0061] The height adjustment method for the support platform 24 is as follows: After the self-locking steel clamp 2 is installed, the support platform 24 is lifted by the lifting lug 242, then the height of each lifting support component 33 is adjusted, and finally the support platform 24 is placed on the lifting support component 33.

[0062] Example 3

[0063] Further explanation in conjunction with Examples 1 and 2, such as Figure 10 and 14 The structure shown.

[0064] In a preferred embodiment, a fastening component 4 is further provided between the lower lifting lug 233 and the support platform 24. The fastening component 4 includes a fastening frame 401 fitted outside the lower lifting lug 233. A fastening screw 402 that can pass through the sling hole 240 is fixed on the top of the fastening frame 401. A fastening nut 403 is installed on the external thread of the fastening screw 402. The fastening nut 403 is in contact with the top surface of the support platform 24.

[0065] During use, the upper compression locking mechanism 22 and the lower compression locking mechanism 23 can be tightened and locked a second time by fastening component 4 to avoid unnecessary loosening caused by construction vibration. At the same time, the support platform 24 can be locked on the lifting support component 33.

[0066] Example 4

[0067] Further explanation is provided in conjunction with Examples 1-3, such as Figure 8 and 9 As shown in the structure, the upper fixed abutment wedge 220 and the lower fixed abutment wedge 231 are embedded with a grating ruler 27 on the side near the sliding wedge 2322. The end of the sliding wedge 2322 is provided with a reading head 28 corresponding to the grating ruler 27. By collecting the readings from the reading head 28, the insertion depth of each upper fixed abutment wedge 220 or lower fixed abutment wedge 231 can be determined, thereby judging the locking posture of the self-locking steel clamp 2.

[0068] A pressure sensor 26 is embedded in the inner side of the sliding wedge 2322. The pressure sensor 26 is in contact with the outer wall of the pier 1 to measure the pressure value between the two, thereby determining the force condition of each sliding wedge 2322.

[0069] Furthermore, in use, when the detection values ​​of the aforementioned device change, this embodiment can determine whether the wedge clamping force has changed, thus providing an early warning effect.

[0070] Example 5

[0071] Further explanation is provided in conjunction with Examples 1-3, such as Figure 1 and 7The structure shown illustrates a method for using a self-locking steel clamp structure for a construction platform. The method includes:

[0072] S1. Hook the crane hooks onto the upper lifting lug 25 and the lower lifting lug 233 respectively. At this time, the lifting device of the lower lifting lug 233 is temporarily not under force, and the self-locking steel clamp 2 is lifted only through the upper lifting lug 25.

[0073] S2. Hoist the self-locking steel clamp 2 above the pier 1 where the construction platform needs to be erected, and lower the self-locking steel clamp 2 so that the pier 1 passes through the self-locking steel clamp 2 and is lowered to the designated position.

[0074] S3. Then tighten the lower lifting lug 233 and release the upper lifting lug 25. Under the action of gravity, the hollow shell 21 drives the upper compression locking mechanism 22 to press down the lower compression locking mechanism 23. The lower compression locking mechanism 23 and the upper compression locking mechanism 22 squeeze and hold the pier 1 tightly, thus fixing it.

[0075] S4. During dismantling, the crane hook is attached to the upper lifting lug 25 and the crane is lifted. During the lifting process, the upper compression locking mechanism 22 and the lower compression locking mechanism 23 are separated, and the lower compression locking mechanism 23 is lowered back to the bottom of the hollow shell 21. The self-locking steel clamp 2 is then lifted as a whole and lowered to the ground.

[0076] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A self-locking steel clamp structure for a construction platform, including piers (1), characterized in that: The pier (1) is provided with a self-locking steel clamp (2) for supporting the construction platform. The self-locking steel clamp (2) includes a hollow shell (21). Both ends of the hollow shell (21) are provided with openings for the pier (1) to pass through. An upper compression locking mechanism (22) and a lower compression locking mechanism (23) are provided opposite to each other in the hollow shell (21). The upper compression locking mechanism (22) is fixed on the inner top wall of the hollow shell (21), and the lower compression locking mechanism (23) is fixed on the inner top wall of the hollow shell (21). The mechanism (23) is set on the inner bottom wall of the hollow shell (21). The upper compression locking mechanism (22) and the lower compression locking mechanism (23) squeeze each other to hold the pier (1). The bottom outer wall of the hollow shell (21) is provided with a telescopic groove (210). The lower compression locking mechanism (23) is provided with a lower lifting lug (233) that passes through the telescopic groove (210). The top of the support platform (24) is provided with an upper lifting lug (25). The upper compression locking mechanism (22) includes a plurality of upper fixed abutment wedges (220) and a plurality of upper movable locking wedges (221) arranged in an alternating ring. The upper fixed abutment wedges (220) are fixed on the inner top wall of the hollow shell (21), and the upper movable locking wedges (221) are radially slidable on the inner top wall of the hollow shell (21). The lower compression locking mechanism (23) includes a movable chassis (230) movably mounted on the bottom wall of the hollow shell (21). Multiple lower fixed abutment wedges (231) and multiple lower movable locking wedges (232) are arranged in an alternating ring on the movable chassis (230). The lower fixed abutment wedges (231) are fixed on the movable chassis (230), and the lower movable locking wedges (232) are radially slidable on the movable chassis (230). The movable chassis (230) is provided with a central opening for the pier column (1) to pass through. The lower lifting lug (233) is fixed outside the movable chassis (230) and passes through the telescopic groove (210). The upper fixed abutment wedge (220) corresponds to the lower movable locking wedge (232) one by one, and the lower fixed abutment wedge (231) corresponds to the upper movable locking wedge (221) one by one.

2. The self-locking steel clamp structure of the construction platform according to claim 1, characterized in that: Both the upper movable locking wedge (221) and the lower movable locking wedge (232) include two symmetrically arranged inverted L-shaped limiting grooves (2321), a sliding wedge (2322) slidably disposed between the two inverted L-shaped limiting grooves (2321), and limiting sliders (2323) disposed on both sides of the sliding wedge (2322) and slidably connected to the two inverted L-shaped limiting grooves (2321) respectively.

3. The self-locking steel clamp structure of the construction platform according to claim 2, characterized in that: The sliding wedge (2322), the upper fixed abutment wedge (220) and the lower fixed abutment wedge (231) are all right-angled trapezoids. The right angle of the sliding wedge (2322) faces inward, and the inner side is an arc shape that matches the pier (1). The right angles of the upper fixed abutment wedge (220) and the lower fixed abutment wedge (231) face outward, and the slope surface is opposite to the slope surface of the corresponding sliding wedge (2322).

4. The self-locking steel clamp structure for the construction platform according to any one of claims 1-3, characterized in that: The hollow shell (21) is provided with a support platform (24) on its exterior, and the support platform (24) is provided with sling holes (240) corresponding to the telescopic groove (210).

5. The self-locking steel clamp structure of the construction platform according to claim 4, characterized in that: The hollow shell (21) is provided with multiple height adjustment mechanisms (3) on its exterior, and the support platform (24) is raised and lowered on the height adjustment mechanism (3); The height adjustment mechanism (3) includes two extension plates (31) symmetrically arranged outside the hollow shell (21), a lifting screw (32) arranged between the two extension plates (31), and a lifting support assembly (33) arranged outside the lifting screw (32). The support platform (24) is provided with a lifting hole (241) through which the lifting screw (32) passes, and the support platform (24) is placed above the lifting support assembly (33).

6. The self-locking steel clamp structure of the construction platform according to claim 5, characterized in that: The lifting screw (32) is provided with a vertical slide groove (320) on the outside and a lifting lug (242) on the top. The lifting support assembly (33) includes a lifting sleeve (330) movably fitted outside the lifting screw (32). The top of the lifting sleeve (330) is provided with a support plate (331) for placing the support platform (24). The inner wall surfaces of the lifting sleeve (330) and the support plate (331) are provided with vertical sliders (332) that are slidably connected to vertical slides (320). The bottom end of the lifting sleeve (330) is rotatably provided with a lifting thread shaft (333) that is threadedly connected to the lifting screw (32). The outside of the lifting sleeve (330) is provided with a fixed platform (335). The bottom of the fixed platform (335) is provided with a drive motor (336). The output shaft of the drive motor (336) is provided with a transmission gear (337). The outside of the lifting thread shaft (333) is provided with transmission teeth that mesh with the transmission gear (337). The bottom end of the lifting sleeve (330) is provided with a T-shaped connecting groove, and the top end of the lifting threaded shaft (333) is provided with a T-shaped connecting ring (334) that is compatible with the connecting groove. The T-shaped connecting ring (334) is slidably connected to the connecting groove.

7. The self-locking steel clamp structure of the construction platform according to claim 6, characterized in that: A fastening component (4) is also provided between the lower lifting lug (233) and the support platform (24). The fastening component (4) includes a fastening frame (401) fitted outside the lower lifting lug (233). The top of the fastening frame (401) is provided with a fastening screw (402) that can pass through the sling hole (240). A fastening nut (403) is installed on the external thread of the fastening screw (402). The fastening nut (403) is in contact with the top surface of the support platform (24).

8. The self-locking steel clamp structure of the construction platform according to claim 3, characterized in that: The upper fixed contact wedge (220) and the lower fixed contact wedge (231) are embedded with a grating ruler (27) on the side near the sliding wedge (2322), and the end of the sliding wedge (2322) is provided with a reading head (28) corresponding to the grating ruler (27). A pressure sensor (26) is embedded in the inner side of the sliding wedge (2322).

9. The method of using the self-locking steel clamp structure of the construction platform according to any one of claims 1-8, characterized in that: The method includes: S1. Hang the crane hook on the upper lifting lug (25) and the lower lifting lug (233) respectively. At this time, the lifting device of the lower lifting lug (233) is temporarily not under force, and the self-locking steel clamp (2) is lifted only through the upper lifting lug (25). S2. Hoist the self-locking steel clamp (2) above the pier (1) where the construction platform needs to be erected, and lower the self-locking steel clamp (2) so that the pier (1) passes through the self-locking steel clamp (2) and is lowered to the designated position; S3. Then tighten the lower lifting lug (233) and release the upper lifting lug (25), so that the hollow shell (21) drives the upper compression locking mechanism (22) to press down the lower compression locking mechanism (23) under the action of gravity. The lower compression locking mechanism (23) and the upper compression locking mechanism (22) squeeze and hold the pier (1) tightly, thus fixing it. S4. During dismantling, the crane hook is attached to the upper lifting lug (25) and lifted. During the lifting process, the upper compression locking mechanism (22) and the lower compression locking mechanism (23) are separated, and the lower compression locking mechanism (23) is lowered back to the bottom of the hollow shell (21). The self-locking steel clamp (2) is lifted as a whole and lowered to the ground.

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