Tower crane system and method for removing attachment rods thereof

Abstract

The present invention relates to the field of construction machinery, and provides a tower crane system. The tower crane system comprises: a tower crane body, a cantilever crane, a first operating platform, a second operating platform, and a second hoisting hoist. The first hoisting hoist of the cantilever crane is used to pull the attachment rod, and the second hoisting hoist is used to lower the attachment rod. Through the cooperation of the two hoists, the attachment rod is pulled out of the building structure, and the first hoisting hoist can also transport the attachment rod to the hook of the tower crane body. The first operating platform can be used as a working platform for construction personnel to remove the attachment rod from the cantilever crane and install it to the hook. The second operating platform is used as a working platform for construction personnel to remove the attachment rod from the tower crane body and install it to the first hoisting hoist and the hook. The purpose of the present invention is to reduce the difficulty and safety risks of removing the attachment rod. The present invention also provides a method for removing the attachment rod of a tower crane system.

Description

Technical Field

[0001] The invention relates to the field of construction machinery, and in particular to a tower crane system and a method for removing an attachment rod thereof. Background Art

[0002] When the height of a tower crane exceeds its maximum independent height, before further raising the height of the tower crane, in order to prevent the tower crane from collapsing, the construction workers will connect the tower crane to the building structure through an attachment rod. However, removing the attachment rod of a tower crane is a very dangerous operation. At present, the removal of the attachment rod of most tower cranes relies on the tower crane itself as an auxiliary lifting equipment to remove the attachment rod. The traditional removal method has the following defects:

[0003] (1) The rotation of the upper part of the tower crane is restricted. Before removing the attachment rod, the tower crane needs to be lowered to a height lower than the height of the attached building structure, thus restricting the rotation of the upper part of the tower crane.

[0004] (2) When the attachment rod is long, it is difficult to disassemble and the safety risk is high. When the tower crane disassembles the attachment rod by itself, it must pull and drag the attachment rod diagonally. However, when the attachment rod is long, the weight of the attachment rod is large, or one end of the attachment rod extends deep into the building structure, it becomes particularly difficult to disassemble the attachment rod by relying solely on the tower crane itself and the safety risk is high.

[0005] (3) The glass curtain wall may be damaged. When a tower crane dismantles the attachment rod deep into a super-high building structure, the glass curtain wall at the attachment point on one side of the building structure is often already installed, leaving only a narrow opening at the attachment point. If the tower crane is used to dismantle the attachment rod, it is difficult to ensure that the curtain wall glass will not be damaged when the attachment rod is moved out of the opening. Summary of the invention

[0006] In order to reduce the difficulty and safety risk of removing an attachment rod, the present invention provides a tower crane system and a method for removing an attachment rod thereof.

[0007] The tower crane system comprises: a tower crane body, the tower crane body comprises a sleeve, a hook for hoisting an attachment rod and a plurality of standard sections connected vertically in sequence; a cantilever traveling crane, the cantilever traveling crane is connected to the sleeve, the cantilever traveling crane comprises a track beam, a first hoisting hoist and at least one supporting arm, one end of the supporting arm is connected to the sleeve, and the other end of the supporting arm extends toward the building structure connected to the attachment rod and is connected to the track beam, the first hoisting hoist is connected to the track beam, the first hoisting hoist can move along the track beam toward or away from the hook, and the first hoisting hoist is used to hoist the attachment rod; a first operating platform, the first operating The working platform is connected to the sleeve frame, the first operating platform is used to carry construction personnel, so that the construction personnel can remove the attachment rod from the first lifting hoist and install it on the hook; the second operating platform, the second operating platform is detachably connected to a standard section, the second operating platform is used to carry construction personnel, so that the construction personnel can remove the attachment rod from a standard section and install it on the first lifting hoist, and the construction personnel can remove the attachment rod from the first lifting hoist and install it on the hook; the second lifting hoist, the second lifting hoist is used to be installed to the building structure, and the second lifting hoist is used to suspend the attachment rod.

[0008] According to one embodiment of the present invention, it also includes a third hoist, which is connected to the same standard section as the attachment rod. The installation position of the third hoist is higher than the second operating platform, and the third hoist is used to lift the attachment rod.

[0009] According to one embodiment of the present invention, the first operating platform is provided with a first guy rope, and the first guy rope can be used to connect the attachment rod.

[0010] According to one embodiment of the present invention, the second operating platform is provided with a second guy rope, and the second guy rope can be used to connect the attachment rod.

[0011] According to one embodiment of the present invention, it also includes a third operating platform, which is connected to the sleeve frame and is located below the first operating platform. The third operating platform is used to carry construction personnel so that the construction personnel can remove the attachment rod from the first lifting hoist and install it to the hook.

[0012] According to one embodiment of the present invention, the third operating platform is provided with a third guy rope, and the third guy rope can be used to connect the attachment rod.

[0013] According to one embodiment of the present invention, the cantilever crane also includes at least one diagonal brace and at least one inclined cable, the support arm is connected to the frame through a pin shaft, at least one diagonal brace correspondingly supports at least one support arm, and at least one inclined cable correspondingly pulls at least one support arm.

[0014] According to one embodiment of the present invention, limiting plates are provided at both ends of the track beam.

[0015] The present invention also provides a method for removing an attachment rod of a tower crane system, comprising: releasing the connection between the attachment rod and the standard section, and installing the attachment rod to a first lifting hoist, wherein the first lifting hoist is arranged on a sleeve frame located above the standard section; releasing the connection between the attachment rod and the building structure, and connecting the attachment rod to a second lifting hoist, wherein the second lifting hoist is arranged on the building structure; pulling up the attachment rod by the first lifting hoist, and lowering the attachment rod by the second lifting hoist at the same time; when the attachment rod is completely moved out of the building structure, the first lifting hoist stops pulling up the attachment rod, and continues to lower the attachment rod by the second lifting hoist until the attachment rod reaches a vertical posture; releasing the connection between the attachment rod and the second lifting hoist; the first lifting hoist lifts the attachment rod to a position closest to the hook of the tower crane, and then connects the attachment rod to the hook; lifting the attachment rod by the hook, and when the steel wire rope of the first lifting hoist is relaxed, releasing the connection between the first lifting hoist and the attachment rod; the hook continues to lift the attachment rod, and lifts the attachment rod to the ground.

[0016] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0017] The first hoisting hoist and the second hoisting hoist can be connected to the attachment rod respectively, and then the connection between the attachment rod and the building structure and the standard section can be released respectively. Then the first hoisting hoist pulls up the attachment rod, and the second hoisting hoist lowers the attachment rod until the attachment rod is pulled out of the building. Through the cooperation of the two hoists, the attachment rod can be safely and efficiently removed from the building. The first hoisting hoist can also drive the attachment rod to move toward the hook to facilitate the attachment rod to be safely and efficiently connected to the hook, avoid the hook from pulling and lifting the attachment rod obliquely, and also avoid the tower crane from operating in violation of regulations. The first operating platform is used to carry construction personnel, so that the construction personnel can remove the attachment rod from the first hoisting hoist and install it on the hook. The second operating platform is used to carry construction personnel, so that the construction personnel can remove the attachment rod from a standard section and install it on the first hoisting hoist, and the construction personnel can remove the attachment rod from the first hoisting hoist and install it on the hook. Therefore, the tower crane system of the present invention and the removal method of the attachment rod thereof can reduce the difficulty and safety risk of removing the attachment rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of an attachment rod connection in one embodiment of the present invention;

[0019] Figure 2 is a schematic side view of a cantilever type traveling crane in one embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of a front view of a cantilever crane in one embodiment of the present invention;

[0021] Figure 4 is a partial schematic diagram of the attachment rod connection in one embodiment of the present invention;

[0022] Figure 5 is a partial schematic diagram of a first lifting hoist, a second lifting hoist and a third lifting hoist respectively connected to an attachment rod in one embodiment of the present invention;

[0023] Figure 6 is a partial schematic diagram of a suspension attachment rod in one embodiment of the present invention;

[0024] Figure 7 is a partial schematic diagram of a suspension attachment rod in another embodiment of the present invention;

[0025] Figure 8 is a partial schematic diagram of a suspension attachment rod in another embodiment of the present invention;

[0026] Fig. 9 is a partial schematic diagram of the first hoist moving toward the hook in one embodiment of the present invention;

[0027] Fig.10 is a partial schematic diagram of the connection between the attachment rod and the hook in one embodiment of the present invention;

[0028] Fig.11 is a schematic diagram of a hook-lifting attachment rod in one embodiment of the present invention;

[0029] Fig.12 It is a schematic diagram of a hook-lifting attachment rod in another embodiment of the present invention.

[0030] Reference numerals:

[0031] 10. Tower crane body; 102. Frame; 104. Standard section; 12. Cantilever crane; 121. Track beam; 122. Support arm; 123. First hoist; 124. Diagonal brace; 125. Stay cable; 14. First operating platform; 16. Second operating platform; 18. Second hoist; 20. Third hoist; 22. Third operating platform. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0033] like Figure 1As shown, in one embodiment of the present invention, a tower crane system includes a tower crane body 10. The tower crane body 10 includes a frame 102, a plurality of standard sections 104 and a hook. These standard sections 104 are vertically connected in sequence, and the frame 102 can move vertically along these standard sections 104, for example, the frame 102 climbs upward along these standard sections 104. It should be noted that the tower crane body 10 is a well-known device in the art, and its specific structure and operation method are known to those skilled in the art (for example, the specific structure and connection method of the frame 102 and the standard section 104, the matching method of the hook and the boom, etc.), and those skilled in the art are capable of understanding and implementing, and the present invention will not be repeated here.

[0034] In one embodiment of the present invention, the tower crane system includes a cantilever crane 12. The cantilever crane 12 includes a track beam 121, a first hoisting hoist 123 and at least one support arm 122.

[0035] like Figures 2 to 3 As shown, in this embodiment, one end of the support arm 122 is connected to the sleeve 102, and the other end of the support arm 122 extends toward the building structure connected to the attachment rod (or, the support arm 122 and the attachment rod are located on the same side of the tower crane body 10). The other end of the support arm 122 is connected to the track beam 121 (for example, welded or connected by a pin). An oblique brace 124 can be arranged below the support arm 122, one end of the oblique brace 124 is connected to the sleeve 102, and the other end is connected to the support arm 122. The oblique brace 124 can play the role of auxiliary support, so that the support arm 122 can withstand greater tension. An inclined cable 125 can be arranged above the support arm 122, one end of the inclined cable 125 is connected to the sleeve 102, and the other end is connected to the support arm 122. The inclined cable 125 can play the role of auxiliary support, so that the support arm 122 can withstand greater tension. Of course, the support function of the support arm 122 can also be strengthened by arranging multiple oblique braces 124. For example, the number of the diagonal bracing rods 124 is two, and the two diagonal bracing rods 124 are arranged at the same height of the sleeve frame 102 at intervals.

[0036] like Figures 2 to 3 As shown, in this embodiment, the track beam 121 extends toward the direction close to the hook. In a preferred embodiment, the track beam 121 can be connected to the other ends (i.e., free ends) of the two support arms 122, respectively, and the track beam 121 is configured to extend horizontally so that the first hoist 123 can move smoothly. The track beam 121 can be made of I-beams, so it can bear a large force.

[0037] like Figures 2 to 3As shown, in the present embodiment, the first lifting hoist 123 is connected to the track beam 121, and the first lifting hoist 123 can be used to lift (or pull upward) the attachment rod. The first lifting hoist 123 can move back and forth along the track beam 121. In other words, the first lifting hoist 123 can move along the track beam 121 in a direction close to the hook, or in a direction away from the hook. Limiting plates can be respectively provided at both ends of the track beam 121, and the limiting plates are used to prevent the first lifting hoist 123 from slipping. It should be noted that the first lifting hoist 123 is a common lifting hoist in the art, and those skilled in the art understand its structure and operation mode, which will not be repeated here. The first lifting hoist 123 is preferably an electric hoist (the electric hoist is equipped with rollers that can move the electric hoist along the track beam 121).

[0038] In one embodiment of the present invention, the tower crane system also includes a first operating platform 14 connected to the sleeve 102. The first operating platform 14 includes a base plate of a metal mesh and a fence arranged on the base plate (the fence can protect the construction workers). The first operating platform 14 can be used as a working platform for carrying construction workers. With the help of the working platform, the construction workers can install the cantilever crane 12 to the sleeve 102, and can also operate the operation of the first hoisting hoist on the working platform, for example: connect the attachment rod pulled by the first hoisting hoist 123 to the hook, and can also release the connection between the first hoisting hoist 123 and the attachment rod. In addition, a first guy rope can be set on the first operating platform 14. In the process of the hook lifting the attachment rod, the first guy rope can be connected to the attachment rod and tensioned to prevent the attachment rod from shaking back and forth.

[0039] like Figures 4 to 8 As shown, in one embodiment of the present invention, the tower crane system may further include a second operating platform 16. The second operating platform 16 includes a base plate of a metal mesh and a fence arranged on the base plate (the fence can protect the construction personnel). The second operating platform 16 is detachably mounted on the standard section 104 connected to the attachment rod, and the second operating platform 16 is located below the first operating platform 14. The second operating platform 16 can be used as a working platform for carrying construction personnel. With the help of the working platform, the construction personnel can remove the attachment rod from the standard section 104 and install it to the first hoisting hoist 123, or connect the attachment rod pulled by the first hoisting hoist 123 to the hook, and can also release the connection between the first hoisting hoist 123 and the attachment rod. In addition, a second cable wind rope can be arranged on the second operating platform 16, and the second cable wind rope can be connected to the attachment rod and tensioned to prevent the attachment rod from shaking back and forth. Of course, the first cable wind rope and the second cable wind rope can be the same cable wind rope.

[0040] like Figures 4 to 8As shown, in one embodiment of the present invention, the tower crane system may further include a second hoist 18. The second hoist 18 is installed to the building structure, for example, it can be installed above or below the attachment point of the attachment rod. The second hoist 18 can suspend the attachment rod, and can cooperate with the first hoist 123 to pull and lower the attachment rod to a vertical posture. It should be noted that the second hoist 18 is a common hoist in the field, and those skilled in the art understand its structure and operation method, which will not be repeated here. The second hoist 18 is preferably a wire rope type lever hoist.

[0041] like Figure 11 to Figure 12 As shown, in one embodiment of the present invention, the tower crane system may include a third operating platform 22. The third operating platform 22 includes a bottom plate of a metal mesh and a fence arranged on the bottom plate (the fence can protect the construction personnel). The third operating platform 22 is installed to the sleeve 102 and is located below the first operating platform 14. The third operating platform 22 can be used as a working platform for carrying construction personnel. With the help of the working platform, the construction personnel can unhook the attachment rod from the first hoisting hoist 123 and install it to the hook of the tower crane body 10. Of course, the tower crane system may not be provided with the third operating platform 22, and the construction personnel can directly unhook the attachment rod from the first hoisting hoist 123 and install it to the hook of the tower crane body 10 with the help of the first operating platform 14 or the second operating platform 16. In addition, a third cable wind rope can be arranged on the third operating platform 22. In the process of the hook lifting the attachment rod, the third cable wind rope can be connected to the attachment rod and tensioned to prevent the attachment rod from shaking back and forth. Of course, the first cable wind rope, the second cable wind rope and the third cable wind rope can be the same cable wind rope.

[0042] like Figures 4 to 8 As shown, in one embodiment of the present invention, the tower crane system may further include a third hoist 20. The third hoist 20 is connected to the same standard section 104 as the second operating platform 16, and the installation position of the third hoist 20 is higher than the second operating platform 16. The third hoist 20 can be connected to the attachment rod and hoisted at the same time as the first hoist 123. The third hoist 20 can prevent the attachment rod from swinging during the process of releasing the connection with the standard section 104. Of course, the third hoist 20 may not be provided, but it is necessary to control the movement of the attachment rod more carefully when releasing the connection between the attachment rod and the standard section 104. It should be noted that the third hoist 20 is a common hoist in the art, and those skilled in the art understand its structure and operation mode, which will not be repeated here. The third hoist 20 is preferably a chain-type hand hoist.

[0043] Combine the following Figures 1 to 12 The first method of removing the attachment rod is described in detail.

[0044] like Figure 1 As shown, one end of the attachment rod is connected to the building structure, and the other end is connected to a standard section 104 of the tower crane body 10 (specifically, the attachment rod is connected to a standard section through an attachment frame).

[0045] The first step, such as Figures 4 to 5 As shown, the steel wire rope of the first hoisting hoist 123 is lowered to the second operating platform 16, and then the steel wire rope thereof is connected to the attachment rod, and then the connection between the attachment rod and the standard section 104 is released.

[0046] In addition, when the tower crane system is provided with a third hoisting hoist 20, the fall chain of the third hoisting hoist 20 can be lowered and connected to the attachment rod first, and then the wire rope of the first hoisting hoist 123 is connected to the attachment rod, and then the connection between the third hoisting hoist 20 and the attachment rod is released. In the process of releasing the connection between the attachment rod and the standard section 104, the fall chain of the third hoisting hoist 20 can prevent the attachment rod from swinging.

[0047] The second step is, Figures 4 to 5 As shown, the wire rope of the second hoisting hoist 18 is lowered, and then the wire rope thereof is connected to the attachment rod, and then the connection between the attachment rod and the building structure is released.

[0048] The third step is Figure 6 As shown, the wire rope of the first hoist 123 is raised, and the wire rope of the second hoist 18 is lowered at the same time, so that the attachment rod is slowly moved out of the building structure. Figure 7 As shown, when the attachment rod is completely removed from the building structure, the first hoist 123 stops lifting. Figures 7 and 8 As shown, the steel wire rope of the second hoisting hoist 18 is then lowered until the attachment rod reaches a vertical position. The connection between the steel wire rope of the second hoisting hoist 18 and the attachment rod is then released. Of course, the construction personnel can release the connection between the attachment rod and the second hoisting hoist 18 on the second operating platform 16.

[0049] Step 4: Continue to pull up the attachment rod by the first hoist 123 until the attachment rod reaches the first operating platform 14. Figures 9 and 10 As shown, the first hoist 123 is then controlled to move toward the direction close to the hook. Fig.11 As shown, then (on the third operating platform 22) the reserved sling on the attachment rod is connected to the hook. At the same time, a first cable wind rope can be tied to the attachment rod (the first cable wind rope can prevent the attachment rod from shaking during the lifting process). The hook lifts the attachment rod until the wire rope of the first hoisting hoist 123 is loosened, and then the connection between the wire rope of the first hoisting hoist 123 and the attachment rod is released. Fig.12As shown, the hook then continues to drive the attachment rod to move, and at the same time slowly loosens the first cable wind rope, so that the attachment rod gradually turns from an inclined state to a vertical state (because it is difficult for the first hoisting hoist 123 to just move to the bottom of the hook, the attachment rod is in an inclined posture when it is connected to the hook). When the attachment rod is completely turned to a vertical posture, the first cable wind rope is completely loosened. Then the attachment rod is hoisted to the ground by the tower crane body 10, thereby completing the disassembly of the entire attachment rod.

[0050] The second method for removing the attachment rod is described in detail below.

[0051] The first to third steps are the same as the first removal method and will not be repeated here.

[0052] The fourth step is to continue to pull up the attachment rod through the first hoisting hoist 123 until the attachment rod reaches the third operating platform 22, and then control the first hoisting hoist 123 to move in the direction close to the hook. Then (on the third operating platform 22) the reserved sling on the attachment rod is connected to the hook. At the same time, the third cable wind rope can be tied to the attachment rod (the third cable wind rope can prevent the attachment rod from shaking during the lifting process). The hook lifts the attachment rod until the wire rope of the first hoisting hoist 123 is relaxed, and then the connection between the wire rope of the first hoisting hoist 123 and the attachment rod is released. Then the hook continues to drive the attachment rod to move, and slowly relaxes the third cable wind rope, so that the attachment rod gradually changes from an inclined state to a vertical state (because it is difficult for the first hoisting hoist 123 to just reach the bottom of the hook, so when the attachment rod is connected to the hook, the attachment rod is in a slightly inclined posture). When the attachment rod is completely turned to a vertical posture, the third cable wind rope is completely loosened, and then the attachment rod is hoisted to the ground through the tower crane body 10, thereby completing the disassembly of the entire attachment rod.

[0053] The third method for removing the attachment rod is described in detail below.

[0054] In the first step, the steel wire rope of the first hoisting hoist 123 is lowered to the second operating platform 16 , and then the steel wire rope is connected to the attachment rod, and then the connection between the attachment rod and the standard section 104 is released.

[0055] In addition, when the tower crane system is provided with a third hoisting hoist 20, the fall chain of the third hoisting hoist 20 can be lowered and connected to the attachment rod first, and then the wire rope of the first hoisting hoist 123 is connected to the attachment rod, and then the connection between the third hoisting hoist 20 and the attachment rod is released.

[0056] In the second step, the steel wire rope of the second hoisting hoist 18 is lowered, and then the steel wire rope thereof is connected to the attachment rod, and then the connection between the attachment rod and the building structure is released.

[0057] The third step is to lift the wire rope of the first hoisting hoist 123 and simultaneously lower the wire rope of the second hoisting hoist 18 so that the attachment rod is slowly moved out of the building structure. When the attachment rod is completely moved out of the building structure, the first hoisting hoist 123 stops lifting. Then continue to lower the wire rope of the second hoisting hoist 18 until the attachment rod reaches a vertical posture. Then the connection between the wire rope of the second hoisting hoist 18 and the attachment rod is released. Of course, the construction personnel can release the connection between the attachment rod and the second hoisting hoist 18 on the second operating platform 16.

[0058] The fourth step is to control the first hoisting hoist 123 to move in the direction close to the hook. Then (on the third operating platform 22), the sling reserved on the attachment rod is connected to the hook, and the second cable wind rope can also be tied to the attachment rod (the second cable wind rope can prevent the attachment rod from shaking during the lifting process). The hook lifts the attachment rod until the wire rope of the first hoisting hoist 123 is relaxed, and then the connection between the wire rope of the first hoisting hoist 123 and the attachment rod is released. Then the hook continues to drive the attachment rod to move, and slowly relaxes the second cable wind rope, so that the attachment rod gradually turns from an inclined state to a vertical state. When the attachment rod is completely turned to a vertical posture, the second cable wind rope is completely relaxed, and then the attachment rod is hoisted to the ground through the tower crane body 10, thereby completing the disassembly of the entire attachment rod.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tower crane system, characterized in that: include: A tower crane body, the tower crane body comprising a sleeve frame, a hook capable of hoisting an attachment rod, and a plurality of standard sections vertically connected in sequence; A cantilever crane, the cantilever crane is connected to the frame, the cantilever crane comprises a track beam, a first hoist and at least one support arm, one end of the support arm is connected to the frame, and the other end of the support arm extends to the building structure connected to the attachment rod and is connected to the track beam, the first hoist is connected to the track beam, the first hoist can move along the track beam toward or away from the hook, and the first hoist is used to lift the attachment rod; a first operating platform, the first operating platform being connected to the sleeve frame, the first operating platform being used to carry construction personnel so that the construction personnel can remove the attachment rod from the first hoist and install it to the hook; a second operating platform, the second operating platform being detachably connected to one of the standard sections, the second operating platform being used to carry construction personnel so that the construction personnel can remove the attachment rod from one of the standard sections and install it to the first hoist, and so that the construction personnel can remove the attachment rod from the first hoist and install it to the hook; a second hoist, the second hoist being adapted to be mounted to the building structure and the second hoist being adapted to suspend the attachment rod; It also includes a third lifting hoist, which is connected to the same standard section as the attachment rod. The installation position of the third lifting hoist is higher than the second operating platform, and the third lifting hoist is used to lift the attachment rod.

2. The tower crane system according to claim 1, characterized in that: The first operating platform is provided with a first guy cable, and the first guy cable can be used to connect the attachment rod.

3. The tower crane system according to claim 1, characterized in that: The second operating platform is provided with a second guy cable, and the second guy cable can be used to connect the attachment rod.

4. The tower crane system according to claim 1, characterized in that: It also includes a third operating platform, which is connected to the frame and located below the first operating platform. The third operating platform is used to carry construction personnel so that the construction personnel can remove the attachment rod from the first lifting hoist and install it to the hook.

5. The tower crane system according to claim 4, characterized in that: The third operating platform is provided with a third guy rope, and the third guy rope can be used to connect the attachment rod.

6. The tower crane system according to claim 1, characterized in that: The cantilever crane also includes at least one diagonal brace and at least one inclined cable. The support arm is connected to the frame via a pin. At least one diagonal brace supports at least one support arm, and at least one inclined cable pulls at least one support arm.

7. The tower crane system according to claim 1, characterized in that: Limiting plates are provided at both ends of the track beam.

8. A method for removing an attachment rod of a tower crane system, characterized in that: include: Disconnecting the attachment rod from the standard section and installing the attachment rod to a first hoist, wherein the first hoist is disposed on a sleeve located above the standard section; disconnecting the attachment rod from the building structure and connecting the attachment rod to a second hoisting hoist disposed on the building structure; Pull up the attachment rod by the first hoist and lower the attachment rod by the second hoist; When the attachment rod is completely moved out of the building structure, the first hoist stops pulling up the attachment rod, and the second hoist continues to lower the attachment rod until the attachment rod reaches a vertical posture; releasing the connection between the attachment rod and the second hoist; The first hoist hoists the attachment rod to a position closest to a hook of a tower crane, and then connects the attachment rod to the hook; The attachment rod is pulled by the hook, and when the wire rope of the first hoist is loosened, the connection between the first hoist and the attachment rod is released; The hook continues to pull the attachment rod and lifts the attachment rod to the ground.

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