The control system of a tower crane for tower construction

Abstract

The present invention discloses a control system for a tower crane used in tower construction, which includes a plurality of support frames embedded in the ground and a building platform. During the construction of the tower, the support frames are fixed to the surface of the tower through wall-attaching members. A climbing device is provided on each support frame. The building platform is of a ring structure and is installed on each climbing device, so as to perform lifting and lowering movements along the support frame under the drive of the climbing device. The building platform includes a working platform and a fixed bracket. The fixed bracket is connected to the climbing device, and a lifting device is provided at the side end of the fixed bracket to hoist building materials through the lifting device. The working platform is installed on the top of the fixed bracket, and a plurality of extension platform components are arranged around one end of the fixed bracket close to the tower. The extension platform of the present invention realizes horizontal adjustment through the drive of a telescopic cylinder. Combined with the dynamic compensation of the extension plate, it can adapt to the continuous change of the outer diameter of the tower and automatically adjust to form a continuous platform for workers to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of tower cranes, and specifically to a tower crane for tower construction and its control system. Background Art

[0002] An airport tower, also known as a control tower, is an air traffic control facility set up at an airport, mainly used for controlling the takeoff and landing of aircraft. For the construction of existing airport towers, due to the unique main structure and curtain wall shape, and the complex spatial structure, the implementation of conventional scaffolding construction plans and curtain wall construction plans is difficult, and the safety management risk is high. Moreover, the main structure mostly adopts a "double-tube" fully cast-in-place concrete structure, with the overall structure facade first tapering and then expanding outwards, and each floor being a non-standard floor, making the implementation of formwork difficult. In addition, due to the certain curvature of the tower surface, a scaffolding is generally set up layer by layer to form a construction platform during the construction process. Under this construction process, the construction efficiency of the tower is relatively slow, which is not conducive to the construction of the tower. Summary of the Invention

[0003] The purpose of the present invention is to provide a tower crane for tower construction and its control system to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A tower crane for tower construction includes a plurality of support frames embedded in the ground and a construction platform. During the construction of the tower, the support frames are fixed to the surface of the tower through wall-attaching members. A climbing device is provided on each support frame. The construction platform is in a circular structure and is installed on each climbing device, so as to perform a lifting movement along the support frame under the drive of the climbing device. The construction platform includes a working platform and a fixed support. The fixed support is connected to the climbing device. A lifting device is provided at the side end of the fixed support to hoist building materials through the lifting device. The working platform is installed on the top of the fixed support. A plurality of extended platform components are arranged around one end of the fixed support close to the tower;

[0005] The extended platform component includes an extension platform, a telescopic cylinder, a guide frame, and an extension mechanism. A plurality of the guide frames are fixedly installed at one end of the extension platform close to the fixed support. Sliding grooves corresponding to the guide frames are opened on the fixed support. The extension platform is slidably installed on the fixed support through the guide frames. The telescopic cylinder is connected between the extension platform and the fixed support to drive the extension platform to perform a horizontal movement according to the different outer diameters of the tower. The extension mechanism is movably arranged on the extension platform. The extension mechanism is connected between two adjacent extension platforms by moving to the side of the extension platform and abutting against another adjacent extension platform.

[0006] Further, the extension mechanism includes a number of extension components, which are equally spaced along the length direction of the extension table and assembled at the left end of the extension table. The extension component includes a sealing cavity and an extension plate. The sealing cavity is opened inside the extension table, and the left end of the sealing cavity communicates with the left end face of the extension table. The extension plate is slidably assembled in the sealing cavity. A sealing member is provided at the right end of the extension plate, and the sealing member abuts against the inner wall of the sealing cavity. A number of sliding rods are provided at the bottom of the extension plate, and the sliding rods are slidably connected to the extension table. A first spring is sleeved on each sliding rod, and the first spring is connected between the left end of the sealing member and the inner wall of the sealing cavity; a number of bayonets corresponding to each extension plate are opened on the right end face of the extension table; a high-pressure hose is connected to the fixed bracket, and a delivery pipe is provided at the right end of each sealing cavity. The other end of the delivery pipe is connected to a control valve, and the other end of each control valve is connected to the high-pressure hose through a pipeline. The high-pressure hose is connected to a power pump, so that high-pressure fluid is introduced into the high-pressure hose through the power pump.

[0007] Further, a receiving cavity is opened at the left end of the extension plate. An adjusting plate is slidably connected inside the receiving cavity. A second spring is connected between the right end of the adjusting plate and the inner wall of the receiving cavity. A top block adapted to the receiving cavity is provided on the bayonet. When the extension plate is inserted into the bayonet, the top block abuts against the adjusting plate and causes the adjusting plate to move to the right; a number of through openings communicating with the receiving cavity are opened at the top of the extension plate. A support block is slidably arranged in each through opening. Third springs are provided at both ends of the bottom of the support block, and the other ends of the third springs are connected to the bottom end of the receiving cavity. When the support block rises to the highest point through the third spring, the top surface of the support block is on the same horizontal plane as the top surface of the extension table; a number of support components corresponding to each support block are provided on the top surface of the adjusting plate. The support component includes a fixed seat, a support and a fourth spring. The fixed seat is fixedly assembled on the top surface of the adjusting plate. The support is slidably installed on the top surface of the adjusting plate. The fourth spring is connected between the fixed seat and the support. After the adjusting plate moves to the right, the support synchronously moves below the raised support block.

[0008] Further, the top of the right end of the support block is of an inclined surface structure, and a matching inclined opening is provided at the top of the right end of the sealing cavity.

[0009] Further, a guardrail is provided at the outer edge of the top surface of the operation platform, and a protective railing is provided on the side of the top surface of the extension platform away from the operation platform. Protective seats are provided on both the left and right sides of the protective railing. A first rotating rod and a second rotating rod are provided on each of the protective seats. A protective rope is connected between the protective seats on all the extension platforms. The protective rope sequentially passes around the first rotating rod and the second rotating rod of each protective seat. A motor is installed on one of the extension platforms. A winding drum is assembled on the output shaft of the motor. One end of the protective rope is fixed to the protective railing of this extension platform, and the other end of the protective rope is connected to the winding drum after passing through all the protective seats. The motor controls the winding and unwinding of the protective rope by driving the winding drum to rotate.

[0010] Further, the structure of the climbing device can refer to the patent with the publication number of CN119392901A.

[0011] The present invention also provides a control system for the above-mentioned tower crane, including a control module for receiving and processing real-time data of the sensor module and generating a driving instruction;

[0012] A sensor module for monitoring the distance between the fixed bracket and the surface of the tower crane;

[0013] A driving execution mechanism, including the telescopic cylinder, control valve and power pump, adjusts the actions of the extension platform and the extension plate according to the driving instruction;

[0014] A safety monitoring module integrated in the control module for analyzing the data of the sensor module in real time and triggering the collision warning and emergency braking functions.

[0015] Further, several monitoring modules distributed on the operation platform are also included. The monitoring modules are used to monitor the personnel staying condition on the extension platform. The safety monitoring module analyzes the data of the monitoring modules in real time and triggers an alarm.

[0016] Further, a load sensor is also included. A load sensor is assembled on each of the extension platforms. The safety monitoring module analyzes the data of the load sensors in real time and triggers an overload warning.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The extension platform of the present invention realizes horizontal adjustment through the drive of the telescopic cylinder. Combined with the dynamic compensation of the extension plate, it can adapt to the continuous change of the outer diameter of the tower platform, automatically adjust to form a continuous platform for workers to construct and operate, and through the third spring and the adjustment plate linkage system of the support block, the height difference between the extension plate and the extension platform is eliminated in real time, reducing the potential safety hazards in construction.

[0019] 2. The safety rope of the present invention realizes tension self - adaptation adjustment through a motor and a drum. When the extension platform expands and contracts, it automatically unwinds and relaxes, and tightens and straightens during construction to form continuous protection, ensuring that the safety rope can always play a safety protection role when the distance between the extension platforms changes. When paired with a guardrail, a coherent protection structure can be formed on the entire extension platform.

[0020] 3. The support frame body of the present invention and the building platform adopt a split - type modular design, and the overall lifting is realized through a climbing device. After the construction is completed, all components can be removed synchronously, avoiding the cumbersome process of secondary disassembly required by traditional tower cranes and reducing the subsequent damage to the tower structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of a tower crane for tower construction according to the present invention;

[0022] Figure 2 is the schematic structural diagram of the extension platform of the present invention;

[0023] Figure 3 is the bottom view of the extension platform of the present invention;

[0024] Figure 4 is the cross - sectional view of the extension plate of the present invention;

[0025] Figure 5 is the side view of the extension plate of the present invention;

[0026] Figure 6 is the top view of the extension platform during construction at the small outer diameter of the tower;

[0027] Figure 7 is the top view of the extension platform during construction at the large outer diameter of the tower;

[0028] Figure 8 is Figure 7 the partial enlarged view at A in

[0029] Figure 9 is the top view of the extension platform during construction at the small outer diameter of the tower;

[0030] Figure 10 is the top view of the extension platform during construction at the large outer diameter of the tower.

[0031] In the figure, there are support frame body - 1, wall - attached member - 2, tower platform - 3, climbing device - 4, working platform - 5, fixed bracket - 6, extension platform - 7, guide frame - 8, sealing cavity - 9, extension plate - 10, seal - 11, sliding rod - 12, first spring - 13, bayonet - 14, conveying pipe - 15, control valve - 16, accommodating cavity - 17, adjusting plate - 18, second spring - 19, top block - 20, through - opening - 21, support block - 22, third spring - 23, fixed seat - 24, support - 25, fourth spring - 26, guardrail - 27, protective seat - 28, first rotating rod - 29, second rotating rod - 30, safety rope - 31, motor - 32, and drum - 33. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figures 1 to 10 shown, a tower crane for building a tower platform 3 includes a plurality of support frame bodies 1 embedded in the ground and a building platform. During the construction of the tower platform 3, the support frame bodies 1 are fixed to the surface of the tower platform 3 through wall - attached members 2. A climbing device 4 is provided on each support frame body 1. The building platform has an annular structure and is installed on each climbing device 4, so as to move up and down along the support frame body 1 under the drive of the climbing device 4. The building platform includes a working platform 5 and a fixed bracket 6. The fixed bracket 6 is connected to the climbing device 4, and a lifting device is provided at the side end of the fixed bracket 6 to hoist building materials through the lifting device. The working platform 5 is installed on the top of the fixed bracket 6. A plurality of extension platform components are arranged in a surrounding manner at one end of the fixed bracket 6 close to the tower platform 3. By driving the building platform to move downward from top to bottom through the climbing device 4, curtain wall construction of the tower platform 3 can be carried out layer by layer from top to bottom. During the descending process, the support frame bodies 1 and the wall - attached members 2 are removed, so that the entire mechanism can be synchronously removed from the tower platform 3 when the construction is completed, thus completing the entire construction process.

[0034] The extended platform component includes an extended table 7, a telescopic cylinder, a guide frame 8, and an extension mechanism. At one end of the extended table 7 close to the fixed bracket 6, a plurality of guide frames 8 are fixedly installed. Slideways corresponding to the guide frames 8 are provided on the fixed bracket 6. The extended table 7 is slidably installed on the fixed bracket 6 through the guide frames 8. The telescopic cylinder is connected between the extended table 7 and the fixed bracket 6 to drive the extended table 7 to move horizontally according to the different outer diameters of the tower 3. The extension mechanism is movably arranged on the extended table 7. The extension mechanism moves to the side of the extended table 7 and abuts against another adjacent extended table 7, so as to be connected between two adjacent extended tables 7.

[0035] In this embodiment, the extension mechanism includes a plurality of extension components. The plurality of extension components are equidistantly assembled at the left end of the extended table 7 along the length direction of the extended table 7. The extension component includes a sealed cavity 9 and an extension plate 10. The sealed cavity 9 is opened inside the extended table 7, and the left end of the sealed cavity 9 communicates with the left end face of the extended table 7. The extension plate 10 is slidably assembled in the sealed cavity 9. A seal 11 is arranged at the right end of the extension plate 10. The seal 11 abuts against the inner wall of the sealed cavity 9. A plurality of slide bars 12 are arranged at the bottom of the extension plate 10. The slide bars 12 are slidably connected with the extended table 7. A first spring 13 is sleeved on each slide bar 12, and the first spring 13 is connected between the left end of the seal 11 and the inner wall of the sealed cavity 9. A plurality of bayonets 14 corresponding to the respective extension plates 10 are opened on the right end face of the extended table 7. A high-pressure hose is connected to the fixed bracket 6. A delivery pipe 15 is arranged at the right end of each sealed cavity 9. The other end of the delivery pipe 15 is connected with a control valve 16. The other end of each control valve 16 is connected with the high-pressure hose through a pipeline. The high-pressure hose is connected with a power pump, so as to introduce high-pressure fluid into the high-pressure hose through the power pump.

[0036] When constructing the curtain wall of the tower 3, the fixed bracket 6 is driven to move up and down by a lifting device. When moving to the construction surface to be constructed, the distance between the fixed bracket 6 and the surface of the tower 3 at this place is monitored through the sensor module, and then a signal is sent to each telescopic cylinder. The telescopic cylinder drives the extended table 7 to move towards the tower 3, so as to approach the surface of the tower 3. Since the extended tables 7 are distributed in a surrounding manner, when the extended tables 7 are telescoped to different positions, the interval between two adjacent extended tables 7 is different (the longer the extended table 7 extends out, the smaller the interval between the two extended tables 7). At this time, the control system judges the required extended plate 10 to be extended according to the telescopic degree of the extended table 7, and then controls the corresponding control valve 16 to open. Then the power pump introduces high-pressure fluid into the high-pressure hose. The high-pressure fluid enters the sealed cavity 9 through the opened control valve 16, so as to push the seal 11 to move outwards, so that the extended plate 10 moves outwards until it is clamped into the bayonet 14 of the side extended table 7, so that the extended plate 10 is connected between two adjacent extended tables 7. Finally, the extended table 7 and the extended plate 10 form an annular platform for the staff to carry out construction operations.

[0037] In this embodiment, a receiving cavity 17 is formed at the left end of the extension plate 10. An adjusting plate 18 is slidably connected inside the receiving cavity 17. A second spring 19 is connected between the right end of the adjusting plate 18 and the inner wall of the receiving cavity 17. A top block 20 adapted to the receiving cavity 17 is provided on the bayonet 14. When the extension plate 10 is inserted into the bayonet 14, the top block 20 abuts against the adjusting plate 18 and causes the adjusting plate 18 to move to the right; a plurality of through holes 21 communicating with the receiving cavity 17 are formed at the top of the extension plate 10. Support blocks 22 are slidably arranged in each through hole 21. Third springs 23 are arranged at both ends of the bottom of each support block 22. The other ends of the third springs 23 are connected to the bottom end of the receiving cavity 17. When the support block 22 rises to the highest point through the third spring 23, the top surface of the support block 22 is at the same horizontal plane as the top surface of the extension platform 7; a plurality of support assemblies corresponding to each support block 22 are arranged on the top surface of the adjusting plate 18. The support assembly includes a fixed seat 24, a support 25 and a fourth spring 26. The fixed seat 24 is fixedly assembled on the top surface of the adjusting plate 18. The support 25 is slidably installed on the top surface of the adjusting plate 18. The fourth spring 26 is connected between the fixed seat 24 and the support 25. After the adjusting plate 18 moves to the right, the support 25 synchronously moves below the raised support block 22. The right top of the support block 22 is of an inclined surface structure, and a matching inclined opening is provided at the right top of the sealing cavity 9. The design of the inclined surface and the inclined opening enables the support block 22 to be automatically retracted into the through hole 21 under the extrusion of the inclined opening when the extension plate 10 is retracted into the sealing cavity 9;

[0038] When the extension plate 10 moves outwards and is inserted into the bayonet 14 of the adjacent extension platform 7, since there is a top block 20 in the bayonet 14, the top block 20 will first contact the adjusting plate 18 during the insertion process of the extension plate 10. As the extension plate 10 continues to move, the top block 20 will push the adjusting plate 18 to move synchronously to the right, and then the support 25 on the adjusting plate 18 will also move to the right.

[0039] Because of the third spring 23, when the extension plate 10 moves out of the sealing cavity 9, the support block 22 will rise under the elastic force of the third spring 23. The initial position of the support 25 is on the left side of the support block 22. When the support 25 moves to the right, it will reach below the support block 22, thus playing a supporting role for the support block 22. At this time, even if an external force is applied to the support block 22, the support block 22 will not move down.

[0040] Meanwhile, if the extension plate 10 is not completely moved out of the sealing cavity 9, some support blocks 22 are still retracted in the through holes 21. At this time, when the adjusting plate 18 moves to the right, the corresponding support 25 will remain stationary due to the blockage of the support block 22 and compress the fourth spring 26, so as to avoid the influence of the support block 22 retracted in the through hole 21 on the movement of the adjusting plate 18.

[0041] Since the extension plate 10 is stored in the extension table 7, in order to ensure the strength of the extension table 7, there is inevitably a height difference between the top surface of the extension plate 10 and the top surface of the extension table 7. If the staff does not pay attention to their feet during construction and walks between the extension table 7 and the extension plate 10, it is easy to be tripped by this height difference, resulting in loss of body balance and even the risk of falling in severe cases. The design of the support block 22 solves this problem. When the staff walks onto the extension plate 10, the soles of their feet come into contact with the support block 22, eliminating the hidden danger brought by the height difference.

[0042] In this embodiment, a guardrail is provided at the outer edge of the top surface of the working platform 5, and a guardrail 27 is provided on the side of the top surface of the extension table 7 away from the working platform 5. Protective seats 28 are provided on both the left and right sides of the guardrail 27. A first rotating rod 29 and a second rotating rod 30 are provided on each protective seat 28. A protective rope 31 is connected between the protective seats 28 on all the extension tables 7. The protective rope 31 sequentially bypasses the first rotating rod 29 and the second rotating rod 30 of each protective seat 28. A motor 32 is installed on one of the extension tables 7. A winding drum 33 is assembled on the output shaft of the motor 32. One end of the protective rope 31 is fixed to the guardrail 27 of this extension table 7, and the other end of the protective rope 31 is connected to the winding drum 33 after passing through all the protective seats 28. The motor 32 controls the winding and unwinding of the protective rope 31 by driving the winding drum 33 to rotate;

[0043] The setting of the guardrail 27 on the extension table 7 can play a protective role to prevent the staff from accidentally falling. Since the extension table 7 adopts a telescopic structure design, the interval distance between adjacent extension tables 7 will change dynamically with the telescopic state, resulting in the inability to adopt a fixed protective structure. In this application, the protective rope 31 is used to protect the area of the extension plate 10; before the extension table 7 performs telescopic work, the motor 32 first drives the winding drum 33 to unwind, so that the protective rope 31 is in a relaxed state, thus avoiding affecting the telescopic movement of the extension table 7. After the extension table 7 is telescoped, the motor 32 drives the winding drum 33 to wind, thereby tightening the protective rope 31 and making the protective rope 31 in a taut state, so as to play a protective role through the protective rope 31 and prevent the staff from falling from the area of the extension plate 10.

[0044] This embodiment also provides a control system for controlling the above-mentioned tower crane, including:

[0045] A control module for receiving and processing the real-time data of the sensor module and generating a driving instruction;

[0046] A sensor module for monitoring the distance between the fixed bracket 6 and the surface of the tower crane. By monitoring the distance between the two in real time, the distance that the extension table 7 needs to be telescoped can be judged to ensure that the extension table 7 can move to a suitable position;

[0047] The driving actuator, including a telescopic cylinder, a control valve 16 and a power pump, adjusts the actions of the extension platform 7 and the extension plate 10 according to the driving instruction.

[0048] The safety monitoring module, integrated in the control module, is used to analyze the data of the sensor module in real time and trigger the collision warning and emergency braking functions.

[0049] A number of monitoring modules distributed on the operation platform 5. The monitoring modules are used to monitor the presence of personnel on the extension platform 7. The safety monitoring module analyzes the data of the monitoring modules in real time and triggers an alarm. By monitoring the extension platform 7 in real time for the presence of personnel or building materials, when adjusting the telescopic operation of the extension platform 7, if it is detected that there are still personnel staying or building materials placed on the extension platform 7, the emergency braking is triggered and an alarm is issued to remind the personnel to withdraw to the operation platform 5, or to remind the staff to move the building materials on the extension platform 7 to the operation platform 5, so as to ensure that there are no objects on the extension platform 7 during the telescopic operation and avoid safety accidents.

[0050] Load sensors are installed on each extension platform 7. The safety monitoring module analyzes the data of the load sensors in real time and triggers an overload warning. When too many building materials are placed on one extension platform 7 and the load sensor monitors that the weight on it reaches the preset threshold, an alarm is triggered through the safety monitoring module to remind the staff to distribute the building materials to other extension platforms 7 or the operation platform 5, so as to ensure that the extension platform 7 will not be damaged due to excessive load.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tower crane for tower construction, characterized in that: It includes several support frames embedded in the ground and a building platform. During the construction of the tower, the support frames are fixed to the surface of the tower through wall-attached components. A climbing device is provided on each support frame. The building platform is in a circular structure and is installed on each climbing device, so as to move up and down along the support frame under the drive of the climbing device. The building platform includes a working platform and a fixed support. The fixed support is connected to the climbing device. A lifting device is provided at the side end of the fixed support to hoist building materials through the lifting device. The working platform is installed on the top of the fixed support. A number of extension platform components are arranged around one end of the fixed support close to the tower. The extension platform component includes an extension platform, a telescopic cylinder, a guide frame and an extension mechanism. A number of the guide frames are fixedly installed at one end of the extension platform close to the fixed support. Sliding grooves corresponding to the guide frames are opened on the fixed support. The extension platform is slidably installed on the fixed support through the guide frames. The telescopic cylinder is connected between the extension platform and the fixed support to drive the extension platform to move horizontally according to the different outer diameters of the tower. The extension mechanism is movably arranged on the extension platform. The extension mechanism is connected between two adjacent extension platforms by moving to the side of the extension platform and abutting against another adjacent extension platform. The extension mechanism includes a number of extension components. The number of extension components are equally spaced along the length direction of the extension platform and assembled at the left end of the extension platform. The extension component includes a sealing cavity and an extension plate. The sealing cavity is opened inside the extension platform, and the left end of the sealing cavity communicates with the left end face of the extension platform. The extension plate is slidably assembled in the sealing cavity. A sealing member is arranged at the right end of the extension plate, and the sealing member abuts against the inner wall of the sealing cavity. A number of sliding rods are arranged at the bottom of the extension plate, and the sliding rods are slidably connected to the extension platform. A first spring is sleeved on each sliding rod, and the first spring is connected between the left end of the sealing member and the inner wall of the sealing cavity. A number of bayonets corresponding to each extension plate are opened on the right end face of the extension platform. A high-pressure hose is connected to the fixed support. A delivery pipe is arranged at the right end of each sealing cavity. The other end of the delivery pipe is connected to a control valve. The other end of each control valve is connected to the high-pressure hose through a pipeline. The high-pressure hose is connected to a power pump, so as to introduce high-pressure fluid into the high-pressure hose through the power pump.

2. The tower crane for tower construction according to claim 1, characterized in that: The left end of the extension plate is provided with a receiving cavity. An adjusting plate is slidably connected inside the receiving cavity. A second spring is connected between the right end of the adjusting plate and the inner wall of the receiving cavity. A top block adapted to the receiving cavity is provided on the bayonet. When the extension plate is inserted into the bayonet, the top block abuts against the adjusting plate and causes the adjusting plate to move to the right. A plurality of through openings communicating with the receiving cavity are provided at the top of the extension plate. A support block is slidably arranged in each through opening. Third springs are arranged at both ends of the bottom of the support block, and the other ends of the third springs are connected to the bottom end of the receiving cavity. When the support block rises to the highest point through the third spring, the top surface of the support block is on the same horizontal plane as the top surface of the extension platform. A plurality of support components corresponding to each support block are arranged on the top surface of the adjusting plate. The support component includes a fixed seat, a support and a fourth spring. The fixed seat is fixedly assembled on the top surface of the adjusting plate. The support is slidably installed on the top surface of the adjusting plate. The fourth spring is connected between the fixed seat and the support. After the adjusting plate moves to the right, the support synchronously moves below the raised support block.

3. The tower crane for tower construction according to claim 2, wherein: The top right end of the support block is of an inclined surface structure, and a matching inclined opening is provided at the top right end of the sealing cavity.

4. The tower crane for tower construction according to claim 1, characterized in that: A guardrail is provided at the outer edge of the top surface of the operation platform. A safety railing is provided on one side of the top surface of the extension platform away from the operation platform. Guard seats are provided on both the left and right sides of the safety railing. A first rotating rod and a second rotating rod are provided on each guard seat. A safety rope is connected between the guard seats on all the extension platforms. The safety rope successively bypasses the first rotating rod and the second rotating rod of each guard seat. A motor is installed on one of the extension platforms. A winding drum is assembled on the output shaft of the motor. One end of the safety rope is fixed to the safety railing of this extension platform, and the other end of the safety rope is connected to the winding drum after passing through all the guard seats. The motor controls the winding and unwinding of the safety rope by driving the winding drum to rotate.

5. A control system for the tower crane according to claim 1, characterized in that: Including a control module for receiving and processing the real-time data of the sensor module and generating a driving instruction; A sensor module for monitoring the distance between the fixed bracket and the surface of the tower crane; A driving execution mechanism, including the telescopic cylinder, the control valve and the power pump, for adjusting the actions of the extension platform and the extension plate according to the driving instruction; A safety monitoring module integrated in the control module for analyzing the data of the sensor module in real time and triggering the collision warning and emergency braking functions.

6. The control system according to claim 5, wherein: It further includes a plurality of monitoring modules distributed on the operation platform. The monitoring module is used for monitoring the personnel staying condition on the extension platform. The safety monitoring module analyzes the data of the monitoring module in real time and triggers an alarm.

7. A control system according to claim 5, characterized in that: It further includes load sensors. Load sensors are assembled on each extension platform. The safety monitoring module analyzes the data of the load sensors in real time and triggers an overload warning.

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