Dismounting device for pin shaft of tower crane

Abstract

The utility model discloses a dismounting device for a pin shaft of a tower crane, which comprises a sliding hammer, one end of the sliding hammer is provided with a hammer head matched with the shape of a pin hole, the bottom of the sliding hammer is also provided with a sliding block matched and connected with channel steel of a standard knot, and one surface, far away from the sliding block, of the sliding hammer is also provided with a lifting lug; the device further comprises a circular track which is installed on a cross rod of the tower crane sleeve frame, the circular track is provided with a moving part connected with a track of the circular track, the moving part is connected with an electric hoist, and the electric hoist is detachably connected with the lifting lugs. The horizontal position and the vertical position of the sliding weight can be continuously adjusted through the circular track, the electric hoist, the lifting lug and the sliding weight, so that the moving range of the sliding weight can cover the positions of all pin shafts in a standard knot, and the pin shafts are convenient to disassemble.

Description

Technical Field

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

[0002] The full name of tower crane is tower crane, which is a kind of lifting machinery widely used in the field of construction. It is mainly used for vertical transportation of construction materials and equipment, such as steel bars, concrete, bricks, formwork, and construction tools and equipment.

[0003] The structural feature of a tower crane is that it can increase in height as the building rises. Its height is mainly achieved by stacking a series of standard sections one by one, which allows the height of the tower crane to be freely adjusted. The installation of the standard section is achieved through the structure of pins and pin holes. The pin holes of the standard section are aligned with the pin holes of the previous section or the base frame, and then the pins are inserted into the corresponding pin holes. Sometimes it may be necessary to gently tap the pins with a hammer to make them enter the holes smoothly. After ensuring that the pins are completely through the pin holes, install the cotter pins or locking plates. The tail of the cotter pins needs to be properly bent to prevent the pins from falling off. Finally, check once more to complete the installation of one standard section.

[0004] In the prior art, a Chinese utility model patent with authorization announcement number CN202540238U discloses a pin remover for tower crane dismantling. The pin remover comprises a support with a guide groove and an impact hammer. The support with the guide groove is fixed to a rod of the pin to be removed, and the impact hammer is mounted on the support. The impact hammer slides within the guide groove of the support, and the pin is removed by impacting the impact hammer. However, this solution requires the support with the guide groove to be disassembled and reinstalled for each pin removed, resulting in low work efficiency. Therefore, a solution to this problem is urgently needed. Utility Model Content

[0005] In view of the fact that the removal of each pin shaft in the above-mentioned technology requires the removal and reinstallation of the support with the guide groove, which leads to low work efficiency, the utility model provides a removal device for the pin shaft of a tower crane, which is used for the removal of the pin shaft of the tower crane, including a sliding hammer, one end of the sliding hammer is provided with a hammer head adapted to the shape of the pin hole, the bottom of the sliding hammer is also provided with a sliding block adapted to be connected to the standard section channel steel, and the side of the sliding hammer away from the sliding block is also provided with a lifting ear; it also includes a ring rail, the ring rail is installed on the cross bar of the tower crane frame, the two side surfaces of the ring rail are recessed inwardly to form a hanging rail, the hanging rail is connected to a moving part, the moving part is fixedly connected to an electric hoist, the electric hoist is equipped with a hook, and the hook is detachably connected to the lifting ear.

[0006] As a further improvement of the present invention, ear plates for force-driven operation are installed on both sides of the slide hammer, and the ear plates are provided with at least one force-receiving hole.

[0007] As a further improvement of the present invention, the sliding block is equipped with a plurality of pulleys, and the pulleys abut against the standard section channel steel to drive the sliding hammer to slide.

[0008] As a further improvement of the present invention, the end faces of both ends of the sliding block are flush with the end faces of both ends of the sliding hammer, and the sliding hammer and the end of the sliding block away from the hammer head are both installed with buffer pads.

[0009] As a further improvement of the present invention, the ring rail is provided with a plurality of fixing rods which are installed away from the rail, and the ring rail is installed on the crossbar of the tower crane frame through the plurality of fixing rods.

[0010] As a further improvement of the present invention, the cross-sectional area of ​​the hammer head is smaller than the cross-sectional area of ​​the sliding hammer, and the cross-sectional area of ​​the hammer head is set to be circular.

[0011] The beneficial effect of the utility model is that compared with the prior art, the utility model provides a dismantling device for a tower crane pin shaft, which is provided with a ring rail, an electric hoist, a lifting lug and a sliding hammer. The ring rail and the electric hoist only need to be installed once to continuously adjust the working position of the sliding hammer, thereby facilitating the dismantling of pin shafts at different positions in the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an overall diagram of the utility model.

[0013] Figure 2 for Figure 1 A partial enlarged view of area A in the middle.

[0014] Figure 3 This is a slide hammer diagram of the present utility model.

[0015] Figure 4 This is a circular track diagram of the present utility model.

[0016] The main component symbols are described as follows:

[0017] 1. Slide hammer; 2. Hammer head; 3. Sliding block; 4. Lifting lug; 5. Ring rail; 6. Moving part;

[0018] 7. Electric hoist; 8. Ear plate; 9. Pulley; 10. Buffer block; 11. Fixing rod. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0020] In the following description, general examples are provided to provide a deeper understanding of the present invention. Obviously, the embodiments described are only a portion of the present invention, not all of it. It should be understood that the specific embodiments described are intended only to illustrate the present invention and are not intended to limit the present invention.

[0021] It should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the existence of features, integers, steps, operations, elements or components, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components or their combinations.

[0022] See also Figures 1 to 3 The utility model is a device for removing the pin shaft of a tower crane, comprising a sliding hammer 1, one end of which is provided with a hammer head 2 adapted to the shape of the pin hole, a sliding block 3 adapted to be connected to the standard section channel steel is further provided at the bottom of the sliding hammer 1, and a lifting ear 4 is further provided on the side of the sliding hammer 1 away from the sliding block 3; it also comprises a ring rail 5, which is installed on the cross bar of the tower crane frame, and the ring rail 5 is provided with a moving part 6 connected to its track, and the moving part 6 is connected to the electric hoist 7, and the electric hoist 7 is detachably connected to the lifting ear 4.

[0023] The device fixes the ring rail 5 on the crossbar of the tower crane frame. The tower crane frame is a structure surrounding the periphery of the standard section. Its main function is to introduce or push out the standard section to achieve jacking or lowering of the tower crane, while also providing a stable working platform to create a safe working environment for operators. More specifically, the shape of the ring rail 5 is adaptively changed according to the shape of the tower crane frame. For example, if the tower crane frame is designed as a rectangular parallelepiped structure, the ring rail 5 is installed around the tower crane frame in a horizontal plane. Since one side needs to be left in the tower crane frame for introducing or pushing out the standard section, the track of the ring rail 5 is The track is not connected end to end but must be continuous. If the ring track 5 is connected end to end to form a closed shape, it will affect the introduction and push-out of the standard section, resulting in the tower crane being unable to lift and lower the tower. Therefore, the required length of the ring track 5 not only needs to take into account the position of the pin, but also consciously leave one side for the tower crane frame to facilitate the increase or decrease of the standard section. For example, the pins of the standard section are located at the four end points of the rectangle. Then, the design of the ring track is based on the premise of adapting to the shape of the tower crane frame, and is set to a structure consisting of three continuous sides in the above rectangle, so that the ring track 5 can completely cover all four pins in the standard section in this structure. The track of the ring rail 5 is set as an "I"-shaped track. The "I"-shaped track can better realize the suspension function and the top surface of the track is a plane, which can be used for bolt fixation. The moving part 6 is installed in this track and is connected to the electric hoist 7. The electric hoist 7 is suspended on the ring rail 5 and moves freely on the track of the ring rail 5. When moving to the corner of the ring rail 5, it is easy to get stuck or even derail. Therefore, the corners of the ring rail 5 are smoothed to avoid the above problems.

[0024] The electric hoist 7 is detachably connected to the lifting lug 4 of the sliding hammer 1 through a hook, and the sliding hammer 1 is installed on the channel steel of the standard section through the sliding block 3 at its bottom. The channel steel of the standard section is usually installed near the crossbar of the standard section. The position of the channel steel groove often corresponds to the position of the pin shaft. The channel steel of the standard section is an additional reinforcement element. Its specific structure can significantly improve the bending and torsion resistance of the standard section, which is crucial for bearing heavy loads and resisting external forces such as strong winds. Therefore, through the structural characteristics of the standard section channel steel, the sliding hammer 1 is installed in the channel steel so that the hammer head 2 It is designed to adapt to the corresponding pin shape, and then slide the sliding hammer 1 in the channel steel, and use the hammer head 2 of the sliding hammer 1 to impact the pin down to complete the disassembly of the pin. As mentioned above, the electric hoist 7 is used to connect the lifting ear 4 of the sliding hammer 1. On the one hand, it is to prevent the sliding hammer 1 from falling out of control due to the excessive recoil of the impact during the disassembly work. On the other hand, the position of the sliding hammer 1 on the horizontal plane can be adjusted at any time to disassemble the pins on the same horizontal plane in the standard section, and the vertical position of the sliding hammer 1 can be adjusted to facilitate the disassembly of the pins of standard sections at different heights.

[0025] See also Figure 2In order to make the sliding hammer 1 have a greater impact force when disassembling the pin shaft of the standard section, in the utility model, ear plates 8 for force driving are installed on both sides of the sliding hammer 1, and the ear plates 8 are provided with at least one force hole. The sliding hammer 1 slides on the channel steel and uses the hammer head 2 to hit the pin shaft to make it fall off. However, the contact area of ​​the pin shaft in the pin hole is often large, and the work efficiency of relying solely on a single worker to manually push and pull the sliding hammer is very low. Therefore, ear plates 8 for force driving are installed on both sides of the sliding hammer 1. The ear plate 8 is a steel plate protruding from the side of the sliding hammer 1. The steel plate is provided with a small hole for connecting a hemp rope. The hemp rope is passed through the small holes of the ear plates on both sides of the sliding hammer 1 and tied. Then two workers are arranged to use the hemp rope to control the sliding hammer on both sides of the sliding hammer 1 to slide, so that the hammer head of the sliding hammer continuously hits the pin shaft until the disassembly is completed.

[0026] Furthermore, since the slide hammer 1 slides within the channel steel using the sliding block 3, the contact area between the bottom of the sliding block 3 and the channel steel is relatively large, which is not conducive to the worker's operation and thus affects work efficiency. Therefore, in the utility model, the sliding block 3 is equipped with a plurality of pulleys 9, which abut the standard section channel steel to drive the slide hammer 1 to slide. The pulleys 9 installed on the sliding block 3 prevent the sliding block 3 from contacting the channel steel. Instead, the pulleys 9 contact the channel steel, greatly reducing the contact area between the slide hammer 1 and the channel steel, and also making the movement using the hemp rope pull lug 8 easier.

[0027] See also Figure 2 In order to prevent the reaction force generated by the sliding hammer 1 hitting the pin from forcing the sliding hammer 1 to move backward and hit the standard section behind it, thereby damaging the standard section and the sliding hammer 1, in the present invention, the end faces of the sliding block 3 are flush with the end faces of the sliding hammer 1, and the sliding hammer 1 and the end of the sliding block 3 away from the hammer head 2 are both installed with buffer blocks 10. Arranging the sliding block 3 flush with the ends of the sliding hammer 1 can, on the one hand, increase the counterweight of the sliding hammer 1, so that the sliding hammer 1 generates greater inertia during operation, improving working efficiency, and on the other hand, increase the surface area of ​​the end of the sliding hammer 1 away from the hammer head 2. Under the reaction force of the sliding hammer 1, the collision with a smaller surface area is more likely to damage the standard section. Increasing the surface area of ​​the sliding end can increase the force-bearing area of ​​the standard section, making it less likely to be damaged by the sliding hammer 1 under the reaction force. At the same time, installing the buffer block 10 at the end of the sliding hammer 1 can further alleviate this reaction force, greatly preventing the sliding hammer 1 from damaging the standard section behind it due to the reaction force.

[0028] See also Figure 3In order to make the ring rail 5 more firmly installed on the tower crane frame, in the present invention, the ring rail 5 is provided with a plurality of fixing rods 11 that are installed away from the track. The ring rail 5 is installed on the crossbar of the tower crane frame through the plurality of fixing rods 11. As can be seen from the above, the track of the ring rail 5 is arranged in an "I" shape. Therefore, one end of the fixing rod 11 here is fixed to the crossbar on the tower crane frame with bolts, and the other end is fixed to the "I" top surface of the ring rail with bolts. Then, according to the total weight of the electric hoist 7 and the slide hammer 1, a certain number of fixing rods 11 are reasonably installed to fix the ring rail 5 on the crossbar of the tower crane frame.

[0029] See also Figure 2 In order to make the structure of the slide hammer 1 more rational, in the present invention, the cross-sectional area of ​​the hammer head 2 of the slide hammer 1 is smaller than that of the slide hammer 1, and the cross-sectional area of ​​the hammer head 2 is set to be circular. In response to pins of different sizes, it is necessary to select the appropriate hammer head 2. The hammer head 2 and the slide hammer 1 themselves need to have a certain degree of coordination. The circular cross-sectional area of ​​the hammer head 2 is also a design that is compatible with the cross-sectional area of ​​the pin.

[0030] Embodiment: The present invention can be applied to the removal of standard section pins of ZOOMLION R-generation tower cranes. The pins of such tower cranes are large in diameter and length, and the contact area of ​​the pins in the shaft holes is large. In the past, disassembly work relied on traditional manual hammers. However, traditional manual hammers rely heavily on the precision and skill of the installer. Despite this, there are still cases where manual hammers cannot be removed. Therefore, the current practice is to use a pin puller instead. However, each use of the pin puller requires welding, which poses a safety risk of high-altitude fire, is very inefficient, and can also damage the end face of the removed pin.

[0031] Therefore, under this premise, the plan for removing the pin was improved. From August 29, 2024 to September 2, 2024, the utility model was applied to the main project of Zhenwenfu in Pingshan District, Shenzhen, and the standard section pin shaft of the Zoomlion R generation tower crane (Zoomlion R275-12RB) was dismantled. The utility model first installed the ring rail 5 on the crossbar of the tower crane frame through the fixing rod 11 and locked it with bolts. Then the electric hoist 7 was installed on the ring rail 5. The hook of the electric hoist 7 hung the lifting ear 4 of the slide hammer 1, and the electric hoist 7 was moved along the ring rail 5 to move the slide hammer 1 to the pin shaft to be removed. Then the pulley 9 of the slide hammer 1 was placed in the channel steel in front of the standard section pin shaft of the tower crane. Finally, two installation workers tied the ear plate 8 of the slide hammer with a hemp rope, pulled the hemp rope to make the slide hammer 1 slide in the standard section channel steel of the tower crane, and made the hammer head 2 hit the pin shaft to be removed, and then pulled it back, repeatedly hitting the pin shaft until the pin shaft was removed. After removing one pin, the electric hoist 7 is used to lift the slide hammer 1 to the next pin to be removed, and the operation is repeated until all the pins are removed. During this demolition process, the tower crane to be removed was installed with 23 standard sections and had a lifting height of 132.7 meters. The demolition work, which was originally planned to be completed in 8 days, was completed in only 3 days after the application of the utility model. The utility model not only provides a safe working environment for the installation and demolition workers, but also greatly improves the efficiency of pin removal.

[0032] The advantages of this utility model are:

[0033] 1. The utility model is designed with a ring rail, an electric hoist, a lifting lug and a sliding hammer. The horizontal and vertical positions of the sliding hammer can be continuously adjusted through the ring rail and the electric hoist, so that its moving range can cover all the pin positions of the standard section, which facilitates the disassembly of the pin.

[0034] 2. The utility model is designed with a sliding hammer, a sliding block, a pulley and an ear plate. The ear plate can be connected with a hemp rope to apply tension to the sliding hammer, so that the sliding hammer generates sufficient impact force in the channel steel through the pulley to complete the disassembly of the pin shaft.

[0035] The above disclosures are only a few specific embodiments of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A dismantling device for a tower crane pin shaft, used for dismantling a tower crane pin shaft, characterized in that: It includes a sliding hammer, one end of which is provided with a hammer head adapted to the shape of the pin hole, the bottom of which is also provided with a sliding block adapted to be connected to the standard section channel steel, and the side of the sliding hammer away from the sliding block is also provided with a lifting lug; It also includes a ring rail, which is installed on the cross bar of the tower crane frame. Both side surfaces of the ring rail are recessed inward to form a hanging rail. The hanging rail is connected to a moving part, and the moving part is fixedly connected to an electric hoist. The electric hoist is equipped with a hook, and the hook is detachably connected to the lifting ear.

2. A device for removing a pin shaft of a tower crane according to claim 1, characterized in that: Lug plates for force-driven operation are installed on both sides of the slide hammer, and the lug plates are provided with at least one force-receiving hole.

3. The device for removing the pin shaft of a tower crane according to claim 1, characterized in that: The sliding block is equipped with a plurality of pulleys, and the pulleys abut against the standard section channel steel to separate the sliding block from the standard section channel steel.

4. The device for removing a pin shaft of a tower crane according to claim 1, characterized in that: The end surfaces at both ends of the sliding block are flush with the end surfaces at both ends of the sliding hammer, and the sliding hammer and the end of the sliding block away from the hammer head are both installed with buffer pads.

5. The device for removing the pin shaft of a tower crane according to claim 1, characterized in that: The ring rail is provided with a plurality of fixing rods which are installed away from the rails, and the ring rail is installed on the crossbar of the tower crane frame through the plurality of fixing rods.

6. The device for removing a pin shaft of a tower crane according to claim 1, characterized in that: The cross-sectional area of ​​the hammer head is smaller than the cross-sectional area of ​​the sliding hammer, and the cross-sectional area of ​​the hammer head is set to be circular.

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