Dismounting device for constructional engineering tower crane

Abstract

The utility model discloses a dismantling device for a constructional engineering tower crane, which comprises a derrick mast, a traction rope, an electric hoist and a lower support plate, the electric hoist is arranged at one end of the derrick mast and used for hoisting components of a tower body below, the middle of the derrick mast is connected with one end of the traction rope, and the other end of the traction rope is connected with the lower support plate. The other end of the derrick mast is rotationally connected with the lower supporting plate, the lower supporting plate is used for being fixedly connected with a structural wall, and the other end of the traction rope is used for pulling and controlling the derrick mast to rotate around the rotating joint of the derrick mast and the lower supporting plate. According to the utility model, one end of the derrick mast can be rotatably and fixedly arranged on a structural wall body above the tower crane by utilizing the lower supporting plate, and the hoisting operation of a tower body component of the tower crane is realized by utilizing the electric hoist at the other end of the derrick mast; the pulling rope is pulled manually or by other driving mechanisms, so that the steering of the free end of the derrick mast can be adjusted, and the tower body component hoisted by the electric hoist is moved to another position to be disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of crane dismantling, in particular to a dismantling device for a tower crane in a construction project. Background Art

[0002] With the continuous development of the construction engineering field, more and more complex buildings have emerged in the current housing building types, mainly large-scale complex buildings composed of multiple podiums and multiple main buildings.

[0003] During the construction of such projects, construction units often place tower cranes at the junction of the podium and the main building for reasons of efficiency and cost. However, for tower cranes installed at such locations, when routine demolition operations are required, the boom of the truck crane required for regular demolition is not long enough if its tonnage is small, and it is impossible to dismantle the tower crane. If its tonnage is large, the truck crane cannot be placed on the basement roof due to its own heavy load, which invisibly increases the difficulty of dismantling the tower crane.

[0004] Therefore, there is an urgent need for a dismantling device for a tower crane in a construction project to solve the problem of the inconvenience of dismantling the tower crane. Utility Model Content

[0005] Aiming at the deficiencies in the prior art, the utility model provides a dismantling device for a tower crane in a construction project, so as to solve the problem of inconvenience in dismantling the tower crane.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A dismantling device for a tower crane in a construction project is characterized by comprising a grab bar, a traction rope, an electric hoist and a lower support plate, wherein an electric hoist is provided at one end of the grab bar, and the electric hoist is used to lift components of the tower body below, the middle portion of the grab bar is connected to one end of the traction rope, and the other end of the grab bar is rotatably connected to the lower support plate, and the lower support plate is fixedly connected to the structural wall, and the other end of the traction rope is used to pull and control the grab bar to rotate around the rotation connection with the lower support plate.

[0008] To optimize the above technical solutions, specific measures taken also include:

[0009] Furthermore, the lower support plate includes a fixed steel plate, a bracket and a clamping steel plate. The bracket is installed on one end face of the fixed steel plate, and the center of the bracket is provided with a bayonet for the end of the lifting rod to be inserted and rotated. The other end face of the fixed steel plate and the clamping steel plate jointly clamp the structural wall, and the fixed steel plate and the clamping steel plate are connected and fastened by bolts passing through the structural wall.

[0010] Furthermore, a plurality of holes distributed in a rectangle are respectively formed in the fixing steel plate and the clamping steel plate, and the holes can be penetrated by bolts for connection.

[0011] Furthermore, the lower support plate includes a fixing frame and a support seat. The side cross-section of the fixing frame is in an inverted U shape. The fixing frame in the inverted U shape can be clamped on both sides of the structural wall from the upper end of the structural wall through the bayonet at the lower end. A support seat is installed on one end face of the fixing frame, and a bayonet for inserting and rotatably arranging the end of the derrick is provided at the center of the support seat.

[0012] Furthermore, it further includes screws. A plurality of threaded holes distributed in a rectangle are respectively formed in both side end faces of the fixing frame, and the screws are threadedly connected in the threaded holes and are used to tightly press against the adjacent structural wall.

[0013] Furthermore, there are two traction ropes, and it further includes two sets of rope winding and unwinding mechanisms. The two sets of rope winding and unwinding mechanisms are respectively installed on both sides of the lower support plate and are respectively connected to the end of one traction rope for winding and unwinding the corresponding traction rope.

[0014] Furthermore, the rope winding and unwinding mechanism includes a mounting frame, a rotating seat platform and a drum. The side cross-section of the mounting frame is in an inverted U shape. The mounting frame in the inverted U shape can be clamped on both sides of the structural wall from the upper end of the structural wall through the bayonet at the lower end. The rotating seat platform is installed on the upper end of the mounting frame. The lower end of the drum along the axis is rotatably connected to the rotating seat platform. The drum is used to fix the end of the traction rope and wind and unwind the traction rope.

[0015] Furthermore, the rope winding and unwinding mechanism further includes a driving motor. A card slot for inserting the driving motor is provided on the rotating seat platform. The driving motor is detachably inserted into the card slot. A driving gear is provided at the output end of the driving motor. A circle of teeth is provided on the lower end side wall of the drum. The driving gear can be meshed with the teeth of the drum.

[0016] Furthermore, a fastening hole is formed on the reel of the drum, and the end of the traction rope can be tightened in the fastening hole by a screw.

[0017] Furthermore, a connecting ring is provided at the upper end of the middle part of the derrick, and the end of the traction rope is buckled on the connecting ring.

[0018] The beneficial effects of the present utility model are:

[0019] The utility model is provided with a coordinated arrangement of a grab bar, a traction rope, an electric hoist and a lower supporting plate. When in use, one end of the grab bar can be rotatably fixedly installed on a structural wall above the tower crane by using the lower supporting plate, and the electric hoist at the other end of the grab bar can be used to lift the tower body components of the tower crane. At the same time, by using the traction rope connected to the middle part of the grab bar and pulling the traction rope manually or by other driving mechanisms, the steering of the free end of the grab bar can be adjusted, so that the tower body components lifted by the electric hoist can be moved to another position for dismantling.

[0020] This utility model solves the problem of inconvenience in dismantling tower cranes under special working conditions. It can carry out horizontal and vertical lifting of objects, which can better meet the lifting needs of components under unconventional conditions. The overall operation process is convenient, reliable, and has the characteristics of high efficiency, safety, and low cost. The utility model can control the lifting rod and lift objects through the use of a traction rope and an electric hoist. After the lifting work is completed, the lifting rod and other structures can be manually dismantled by setting up a scaffold.

[0021] The utility model can effectively improve the safety management of the grab bar in actual use by adopting the electric hoist and the pulling rope upward pulling method, and avoid the occurrence of falling objects and people from high altitude.

[0022] The utility model adopts the pulling rod, the traction rope, the electric hoist and other components to carry out the overall dismantling process of the tower crane, which has low costs and can effectively reduce the cost of withdrawing the tower crane.

[0023] The utility model adopts this method to carry out the dismantling operation of the tower crane, the dismantling process is relatively convenient, the construction efficiency is high, and it is more suitable for tower cranes that cannot be dismantled by using a mobile crane under special working conditions, and has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the use of a dismantling device for a tower crane in a construction project proposed by the present utility model;

[0025] Figure 2 This is a structural schematic diagram of a lower support plate of a dismantling device for a tower crane in a construction project proposed by the present utility model;

[0026] Figure 3 This is a structural front view of a lower support plate of a dismantling device for a tower crane in a construction project proposed by the utility model;

[0027] Figure 4 This is a top view of the structure of a lower support plate of a dismantling device for a tower crane in a construction project proposed in the utility model;

[0028] Figure 5 This is a schematic diagram of the structure and installation of a lower support plate of a dismantling device for a tower crane in a construction project proposed by the present utility model;

[0029] Figure 6 This is another structural schematic diagram of a lower support plate of a dismantling device for a tower crane in a construction project proposed by the present invention;

[0030] Figure 7 This is a structural schematic diagram of a rope retracting and releasing mechanism of a dismantling device for a tower crane in a construction project proposed by the present utility model;

[0031] Figure 8 The utility model is a schematic diagram of the use of a rope retracting and releasing mechanism of a demolition device for a tower crane in a construction project.

[0032] Figure numerals: 1-pulling rod, 2-traction rope, 3-electric hoist, 4-structural wall, 5-tower body, 6-lower support plate, 61-fixed steel plate, 62-bayonet, 63-bracket, 64-stiffening rib plate, 65-fixing frame, 7-rope retraction and release mechanism, 71-mounting frame, 72-drive motor, 73-swivel platform, 74-reel, 75-fastening hole, 8-connecting ring. DETAILED DESCRIPTION

[0033] The utility model is described in detail below with reference to the accompanying drawings.

[0034] As attached Figure 1 As shown, an embodiment of the utility model is a dismantling device for a tower crane in a construction project, comprising a lifting rod 1, a traction rope 2, an electric hoist 3 and a lower support plate 6. An electric hoist 3 is provided at one end of the lifting rod 1, and the electric hoist 3 is used to lift the components of the tower body 5 below. The middle part of the upper end of the lifting rod 1 is connected to one end of the traction rope 2, and the other end of the lifting rod 1 is rotatably connected to the lower support plate 6. The lower support plate 6 is used to be fixedly connected to the structural wall 4, and the other end of the traction rope 2 is used to pull and control the lifting rod 1 to rotate around the rotation connection with the lower support plate 6.

[0035] The utility model is equipped with a pulling rod 1, a traction rope 2, an electric hoist 3 and a lower supporting plate 6. When in use, one end of the pulling rod 1 can be rotatably fixedly installed on a structural wall 4 located above the tower crane by using the lower supporting plate 6, and the electric hoist 3 at the other end of the pulling rod 1 can be used to lift the tower body 5 component of the tower crane. At the same time, by using the traction rope 2 connected to the middle part of the pulling rod 1 and pulling the traction rope 2 manually or by other driving mechanisms, the steering of the free end of the pulling rod 1 can be adjusted, so that the tower body 5 component lifted by the electric hoist 3 can be moved to another position for dismantling.

[0036] The utility model solves the problem of inconvenience in dismantling tower cranes under special working conditions. It can carry out horizontal and vertical lifting of objects, which can better meet the lifting needs of components under unconventional conditions. The overall operation process is convenient, reliable, and has the characteristics of high efficiency, safety, and low cost. The utility model is equipped with a traction rope 2 and an electric hoist 3, etc., which can control the lifting rod 1 and lift objects. After the lifting work is completed, the lifting rod 1 and other structures can be manually dismantled by setting up scaffolding.

[0037] In this embodiment, the jib 1 is made of steel and can be welded. The specifications and dimensions are designed according to the actual situation on site. The outer surface of the jib 1 is treated with anti-rust treatment, such as coating with anti-rust paint. It is processed by a professional steel structure unit. The corresponding material performance certificate should be attached before leaving the factory, and a trial hoist should be carried out before actual construction. Among them, the tower body 5 refers to the relevant components of the tower crane at the lowest elevation position after the tower crane is freely lowered, including the boom, balance arm, counterweight, driver's cab, etc. Among them, the traction rope 2 can be made of steel wire rope, hemp rope, a combination of steel wire rope and hemp rope, etc.

[0038] In this embodiment, in addition to cooperating with the driving rod 1 to move, the traction rope 2 can also serve as a safety rope. When the rod 1 becomes uncontrollable during operation, the traction rope 2 can effectively control the rod 1 in a timely manner to avoid safety accidents. By controlling the lifting of objects through the electric hoist 3, the safety and efficiency of construction can be guaranteed to a great extent. The electric hoist 3 can be remotely controlled manually within the structural wall 4. When an uncontrollable situation occurs, the rod 1 can be prevented from becoming unstable by stopping the electric hoist 3 or tightening the traction rope 2, further improving safety during use. When in use, the height of the rod 1 should maintain a vertical distance of at least 2m from the hoisted object to facilitate the force on the rod 1. The end of the traction rope 2 used for driving can be set above, horizontally, or below the rod 1 as needed.

[0039] As attached Figure 2 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, in another specific embodiment, the lower support plate 6 may include a fixed steel plate 61, a bracket 63, and a clamping steel plate. The bracket 63 is installed on one end surface of the fixed steel plate 61. The center of the bracket 63 is provided with a bayonet 62 for the end of the pick rod 1 to be inserted and rotated. The other end surface of the fixed steel plate 61 and the clamping steel plate jointly clamp the structural wall 4. The fixed steel plate 61 and the clamping steel plate are connected and fastened by bolts passing through the structural wall 4. In this way, when in use, the device can be clamped to both sides of the structural wall 4 by the fixed steel plate 61, the clamping steel plate, and the bolts to achieve strong fixation.

[0040] In this embodiment, the end of the derrick 1 can be set to a rotating shaft that can be inserted into and rotatably arranged in the bayonet 62.

[0041] Among them, a plurality of holes distributed in a rectangle are respectively formed in the fixed steel plate 61 and the clamping steel plate, and the holes can be penetrated by bolts for connection. For example, as shown in the appendix Figure 3 8 holes as shown are provided, and the bolts can be connected through the reserved holes in the fixed steel plate 61 and the clamping steel plate. At the same time, the fixed steel plate 61 and the bracket 63 can be connected by welding, and the end of the derrick 1 and the bayonet 65 can be connected by movable riveting or rotatably connected through a bearing.

[0042] As shown in the appendix Figure 6 In another specific embodiment, as shown, the lower support plate 6 can include a fixing frame 65 and a bracket 63. The side cross-section of the fixing frame 65 is in an inverted U shape. The inverted U-shaped fixing frame 65 can be clamped on both sides of the structural wall 4 from the upper end of the structural wall 4 through the bayonet at the lower end. A bracket 63 is installed on one end face of the fixing frame 65, and a bayonet 62 for the end of the derrick 1 to be inserted and rotatably arranged is provided at the center of the bracket 63. In this way, the device can be conveniently installed on the structural wall 4 such as a balcony or a window sill through the inverted U-shaped fixing frame 65, which increases the installation convenience and reduces the damage degree to the existing structure without the need to modify the structure.

[0043] Among them, it further includes screws. A plurality of threaded holes distributed in a rectangle are respectively formed in the two side end faces of the fixing frame 65, and the screws are threadedly connected in the threaded holes and are used to tightly press against the adjacent structural wall 4. In this way, after the inverted U-shaped fixing frame 65 is clamped on the structural wall 4 such as a balcony or a window sill, the connection between the fixing frame 65 and the structural wall 4 can be tightened by the screws.

[0044] In the above two embodiments, the embodiment including the fixed steel plate 61 and the clamping steel plate, and the embodiment including the fixing frame 65, stiffening ribs 64 can be added on both sides or the bottom of the bracket 63 to increase the structural stability of the bracket 63.

[0045] As shown in the appendix Figure 7 and the appendix Figure 8 In another specific embodiment, as shown, there are two traction ropes 2, and two sets of rope winding and unwinding mechanisms 7 are further included. The two sets of rope winding and unwinding mechanisms 7 are respectively installed on both sides of the lower support plate 6 and are respectively connected to the end of one traction rope 2 for winding and unwinding the corresponding traction rope 2. In this way, during use, the two traction ropes 2 can be respectively controlled by the two sets of rope winding and unwinding mechanisms 7, so as to realize the adjustment and control of the rotation direction of the derrick 1. In this embodiment, the derrick 1 can rotate 180° within the bayonet 62 to meet the construction requirements. The specific range of the rotation angle can also be adjusted and limited by adjusting the distance between the two sets of rope winding and unwinding mechanisms 7.

[0046] Among them, the rope winding and unwinding mechanism 7 includes a mounting frame 71, a turntable platform 73 and a drum 74. The side cross-section of the mounting frame 71 is in the shape of an inverted U. The inverted-U-shaped mounting frame 71 can be clamped on both sides of the structural wall 4 from the upper end through the bayonet at the lower end. The turntable platform 73 is installed at the upper end of the mounting frame 71. The lower end of the drum 74 along the axis is rotatably connected to the turntable platform 73. The drum 74 is used to fix the end of the traction rope 2 and wind and unwind the traction rope 2. Thus, during use, by rotating the drum 74 on one side, the corresponding traction rope 2 can be contracted, and the drum 74 on the other side rotates naturally, so as to correspondingly unwind the traction rope 2 on the other side, thereby completing the steering adjustment of the boom 1.

[0047] Among them, the rope winding and unwinding mechanism 7 further includes a driving motor 72. A card slot for inserting the driving motor 72 is provided on the turntable platform 73. The driving motor 72 is detachably inserted into the card slot. A driving gear is provided at the output end of the driving motor 72. A ring of teeth is provided on the lower side wall of the drum 74. The driving gear can be meshed with the teeth of the drum 74. Thus, during use, the driving motor 72 can be inserted and installed on the side where the traction rope 2 needs to be contracted as required, and the driving gear of the driving motor 72 is meshed with the teeth of the drum 74. By driving the drum 74 on this side to rotate by the driving motor 72, contraction is achieved. At the same time, the drum 74 on the other side rotates naturally without restraint, thereby completing the steering adjustment of the boom 1; when adjusting in another direction, the driving motor 72 is removed and installed on the other side. During use, the rope winding and unwinding mechanism 7 and the traction rope 2 can be controlled by a dedicated person to avoid safety accidents.

[0048] Among them, a fastening hole 75 is opened on the reel of the drum 74. The end of the traction rope 2 can be tightened in the fastening hole 75 by a screw. Thus, it is convenient for the disassembly, assembly and fixation of the traction rope 2. At the same time, it is also convenient for the disassembly, assembly and fixation of the entire device on high-rise buildings or walls.

[0049] Among them, a plurality of threaded holes distributed in a rectangle are respectively opened on both end faces of the mounting frame 71. During use, the threaded holes can be threadedly connected with screws, and the structural wall 4 in contact is tightened by the screws.

[0050] In another specific embodiment, a connecting ring 8 is provided at the upper middle part of the boom 1. The end of the traction rope 2 is buckled on the connecting ring 8. Thus, it is convenient for the disassembly and assembly of the traction rope 2 through the connecting ring 8.

[0051] When the device of the present utility model is used, before the demolition operation, it is necessary to fix the lower support plate 6 on the structural wall 4, connect the traction rope 2 and the electric hoist 3 to the pick rod 1, install the pick rod 1 in the bayonet 62 of the lower support plate 6, and adjust the pick rod 1 to a suitable position by pulling up the traction rope 2 to carry out the on-site construction operation. The operator needs to control the electric hoist 3 and the traction rope 2 on the inside of the structural wall 4, and carry out the demolition construction operation by pulling and coordinating the electric hoist 3 and the traction rope 2. When carrying out the work of lifting components with a large span, such as the lifting arm and the balance arm, in order to ensure the force applied to the pick rod 1 and the electric hoist 3, the pick rod 1 needs to maintain a certain vertical distance from the tower body 5, and the angle between the tower body 5 or the hanging object and the electric hoist 3 should be maintained between 45° and 60°.

[0052] When the present invention is used, in order to ensure that the pick rod 1 rotates continuously in the bayonet 62, lubricating oil can be applied in the bayonet 62. After the construction is completed, the bayonet 62 should be cleaned to keep it clean for subsequent turnover and extend the service life.

[0053] After the demolition operation is completed, the pick rod 1 and the lower support plate 6 are manually dismantled by setting up a scaffold. Before dismantling, the traction rope 2 is retracted into the inner side of the structural wall 4 and fixed, so that the pick rod 1 is close to the structural wall 4 for easy manual dismantling.

[0054] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. used in the utility model are only for the convenience of description and are not used to limit the scope of implementation of the utility model. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the utility model without substantially changing the technical content.

[0055] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A dismantling device for a tower crane in a construction project, characterized by: It includes a derrick boom (1), a towing rope (2), an electric hoist (3) and a lower support plate (6). An electric hoist (3) is provided at one end of the derrick boom (1). The electric hoist (3) is used to lift the components of the lower tower body (5). The middle part of the derrick boom (1) is connected to one end of the towing rope (2). The other end of the derrick boom (1) is rotatably connected to the lower support plate (6). The lower support plate (6) is used to be fixedly connected to the structural wall (4). The other end of the towing rope (2) is used to pull and control the derrick boom (1) to rotate around the rotational connection with the lower support plate (6).

2. A dismantling device for a tower crane in a construction project according to claim 1, characterized in that: The lower support plate (6) includes a fixed steel plate (61), a support base (63) and a clamping steel plate. A support base (63) is installed on one end face of the fixed steel plate (61). A bayonet (62) through which the end of the derrick boom (1) can be inserted and rotatably arranged is provided at the center of the support base (63). The other end face of the fixed steel plate (61) and the clamping steel plate jointly clamp the structural wall (4). The fixed steel plate (61) and the clamping steel plate are connected and fastened by bolts passing through the structural wall (4).

3. The dismantling device for a tower crane in a construction project according to claim 2, characterized in that: A plurality of holes distributed in a rectangle are respectively formed in the fixed steel plate (61) and the clamping steel plate, and the holes are for the bolts to pass through and connect.

4. The dismantling device for a tower crane in a construction project according to claim 1, characterized in that: The lower support plate (6) includes a fixed frame (65) and a support base (63). The side cross-section of the fixed frame (65) is in an inverted U shape. The inverted U-shaped fixed frame (65) can be clamped on both sides of the structural wall (4) from the upper end of the structural wall (4) through the bayonet at the lower end. A support base (63) is installed on one end face of the fixed frame (65). A bayonet (62) through which the end of the derrick boom (1) can be inserted and rotatably arranged is provided at the center of the support base (63).

5. The dismantling device for a tower crane in a construction project according to claim 4, characterized in that: It also includes screws. A plurality of threaded holes distributed in a rectangle are respectively formed in both side end faces of the fixed frame (65). The screws are threadedly connected in the threaded holes and are used to tightly press against the adjacent structural wall (4).

6. The dismantling device for a tower crane in a construction project according to claim 1, characterized in that: There are two towing ropes (2). It also includes two sets of rope winding and unwinding mechanisms (7). The two sets of rope winding and unwinding mechanisms (7) are respectively installed on both sides of the lower support plate (6) and are respectively connected to the end of one towing rope (2) for winding and unwinding the corresponding towing rope (2).

7. The dismantling device for a tower crane in a construction project according to claim 6, characterized in that: The rope winding and unwinding mechanism (7) includes a mounting frame (71), a rotating platform (73) and a drum (74). The side cross-section of the mounting frame (71) is in an inverted U shape. The inverted U-shaped mounting frame (71) can be clamped on both sides of the structural wall (4) from the upper end of the structural wall (4) through the bayonet at the lower end. The rotating platform (73) is installed on the upper end of the mounting frame (71). The lower end of the drum (74) along the axial direction is rotatably connected to the rotating platform (73). The drum (74) is used to fix the end of the towing rope (2) and wind and unwind the towing rope (2).

8. The dismantling device for a tower crane in a construction project according to claim 7, characterized in that: The rope retracting and releasing mechanism (7) further comprises a driving motor (72). The rotating platform (73) is provided with a slot for inserting the driving motor (72). The driving motor (72) is detachably plugged into the slot. The output end of the driving motor (72) is provided with a driving gear. The lower end side wall of the reel (74) is provided with a circle of teeth. The driving gear can mesh with the teeth of the reel (74).

9. The dismantling device for a tower crane in a construction project according to claim 7, characterized in that: A fastening hole (75) is provided on the reel of the reel (74), and the end of the traction rope (2) can be tightened in the fastening hole (75) by a screw.

10. The dismantling device for a tower crane in a construction project according to claim 1, characterized in that: A connecting ring (8) is provided at the middle upper end of the pulling rod (1), and the end of the traction rope (2) is buckled on the connecting ring (8).

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