Dismantling device for pin shaft of tower crane and using method of dismantling device

Abstract

The dismounting device comprises a sliding hammer, a hammer head matched with a pin hole in shape is arranged at one end of the sliding hammer, a sliding block connected with standard knot channel steel in a matched mode is further arranged at the bottom of the sliding hammer, and a lifting lug is further arranged on the face, away from the sliding block, of the sliding hammer; 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 invention relates to the field of building construction, and in particular to a removal device for a pin shaft of a tower crane and a use method thereof. 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, construction tools and equipment.

[0003] The structural feature of the tower crane is that it can be increased as the building rises. Its height is mainly achieved by stacking a series of standard sections one by one, so that the height of the tower crane can be adjusted freely. The installation of the standard section is achieved through the structure of the pin shaft and the pin hole. Align the pin hole of the standard section with the pin hole of the previous section or the base frame, and then insert the pin shaft into the corresponding pin hole. Sometimes you may need to use a hammer to gently tap the pin shaft so that it enters the hole smoothly. After ensuring that the pin shaft completely passes through the pin hole, install the split pin or lock plate. The tail of the split pin needs to be properly bent to prevent the pin shaft from falling off. Finally, check it once to complete the installation of a standard section.

[0004] In the prior art, the Chinese utility model patent with the authorization announcement number CN202540238U discloses a pin remover for tower crane dismantling, which includes a support with a guide groove and an impact hammer. The support with the guide groove is fixed to the rod of the pin shaft to be removed, and then the impact hammer is installed on the support, so that the impact hammer slides in the slideway of the support guide groove, and the pin shaft is impacted and removed by the impact hammer. However, this solution requires the support with the guide groove to be disassembled and installed again for each pin shaft to be removed, which has low work efficiency, so it is urgent to get a solution to solve the above problem. Summary of the invention

[0005] In view of the fact that the removal of each pin shaft in the above-mentioned technology requires the removal and reinstallation of a support with a guide groove, resulting in low work efficiency, the present invention provides a removal device for a pin shaft of a tower crane and a method of using the same, including a sliding hammer, one end of which is provided with a hammer head adapted to the shape of the pin hole, a sliding block adapted to be connected to a standard section channel steel is also provided at the bottom of the sliding hammer, and a lifting ear is also provided on a side of the sliding hammer away from the sliding block; the sliding rail also includes a ring rail, which is installed on the cross bar of the tower crane frame, and the ring rail is equipped with a moving part connected to its track, the moving part is connected to an electric hoist, and the electric hoist is detachably connected to the lifting ear.

[0006] As a further improvement of the present invention, ear plates for force-driven 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 at both ends of the sliding block are flush with the end faces 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 equipped 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 present invention also discloses a method for using a dismantling device for a tower crane pin shaft, which is applied to the dismantling device for a tower crane pin shaft described above. The method for using the device comprises the following steps: S1: Fix the ring rail on the crossbar of the tower crane frame; S2: Install the electric hoist on the track of the ring track; S3: Use the hook of the electric hoist to hang the lifting lug of the sliding hammer and move the sliding hammer to the pin shaft that needs to be removed; S4: Place the sliding block of the sliding hammer into the channel steel in front of the standard section pin of the tower crane; S5: repeatedly push the slide hammer to hit the pin until the pin falls off from the pin hole; S6: After removing one pin shaft, use the electric hoist to move the slide hammer to the next pin shaft to be removed.

[0012] As a further improvement of the present invention, before step S1, one end of the fixing rod is fixed to the ring rail by bolts.

[0013] As a further improvement of the present invention, between step S4 and step S5, it also includes fixing hemp ropes on the ear plates on both sides of the sliding hammer, and pulling the hemp ropes to make the sliding hammer slide in the channel steel.

[0014] The beneficial effect of the present invention is that compared with the prior art, the present invention provides a removal device for a pin shaft of a tower crane, which is provided with a ring rail, an electric hoist, a lifting lug and a sliding hammer. The working position of the sliding hammer can be continuously adjusted by installing the ring rail and the electric hoist only once, thereby facilitating the removal of the pin shafts at different positions in the tower crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall diagram of the present invention.

[0016] Figure 2 for Figure 1 A partial enlarged view of area A.

[0017] Figure 3 It is a slide hammer diagram of the present invention.

[0018] Figure 4 It is the orbit diagram of the present invention.

[0019] The main component symbols are described as follows: 1. Sliding hammer; 2. Hammer head; 3. Sliding block; 4. Lifting lug; 5. Ring rail; 6. Moving part; 7. Electric hoist; 8. Ear plate; 9. Pulley; 10. Buffer block; 11. Fixing rod. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0021] In the following description, general election example details are given to provide a deeper understanding of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to explain the present invention and are not used to limit the present invention.

[0022] 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 combinations thereof.

[0023] See also Figures 1 to 3 A device for removing a pin shaft of a tower crane of the present invention comprises a sliding hammer 1, one end of which is provided with a hammer head 2 adapted to the shape of a pin hole, a sliding block 3 adapted to be connected with a standard section channel steel is also provided at the bottom of the sliding hammer 1, and a lifting ear 4 is also provided on a side of the sliding hammer 1 away from the sliding block 3; it also comprises a ring rail 5, the ring rail 5 is installed on the cross bar of the tower crane sleeve, the ring rail 5 is provided with a moving part 6 connected to its track, the moving part 6 is connected to an electric hoist 7, and the electric hoist 7 is detachably connected to the lifting ear 4.

[0024] The device fixes the ring rail 5 on the crossbar of the tower crane frame. The tower crane frame is a structure surrounding the outer periphery of the standard section. Its main function is to introduce or push out the standard section to achieve the jacking or lowering of the tower crane. At the same time, it also provides 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 of the tower crane frame needs to be reserved 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 and make the tower crane 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 ends 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 composed 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 fixing. The moving part 6 is installed in this track and is connected with an 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.

[0025] 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 very important 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 losing control and falling due to the excessive recoil force 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 the standard sections at different heights.

[0026] 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 present invention, 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, but 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, so 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, and then two workers are arranged to use the hemp rope to control the sliding hammer to slide on both sides of the sliding hammer 1, so that the hammer head of the sliding hammer continuously hits the pin shaft until the disassembly is completed.

[0027] Furthermore, since the sliding hammer 1 slides in the channel steel by means of 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 operation of the workers and thus affects the work efficiency. Therefore, in the present invention, the sliding block 3 is equipped with a plurality of pulleys 9, and the pulleys 9 abut against the standard section channel steel to drive the sliding hammer 1 to slide. The pulleys 9 installed on the sliding block 3 make the sliding block 3 not contact the channel steel, but contact the channel steel by means of the pulleys 9, which greatly reduces the contact area between the sliding hammer 1 and the channel steel, and the movement performed by the hemp rope puller plate 8 will also be easier.

[0028] See also Figure 2 In order to prevent the reaction force generated after the sliding hammer 1 hits the pin from forcing the sliding hammer 1 to retreat and hit the standard section behind, thus damaging the standard section and the sliding hammer 1, in the present invention, the end faces of the two ends of the sliding block 3 are flush with the end faces of the two ends 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 a buffer pad 10. Setting the two ends of the sliding block 3 and the sliding hammer 1 flush can, on the one hand, increase the counterweight of the sliding hammer 1 so that the sliding hammer 1 generates greater inertia during operation and improves work efficiency, and on the other hand, can increase the surface area of ​​the end of the sliding hammer 1 away from the hammer head 2. Under the reaction, the sliding hammer 1 is more likely to damage the standard section due to the collision of a smaller surface area, and increasing the surface area of ​​the sliding end can increase the force-bearing area of ​​the standard section and make it less likely to be damaged by the sliding hammer 1 under the reaction force. At the same time, installing the buffer pad 10 at the end of the sliding hammer 1 can further alleviate the reaction force, greatly avoiding the sliding hammer 1 from damaging the standard section behind due to the reaction.

[0029] 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, and 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 set in an "I" shape, so 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, and then a certain number of fixing rods 11 are reasonably installed according to the total weight of the electric hoist 7 and the slide hammer 1, so that the ring rail 5 is fixed on the crossbar of the tower crane frame.

[0030] See also Figure 2 In order to make the structure of the sliding hammer 1 more reasonable, in the present invention, the cross-sectional area of ​​the hammer head 2 of the sliding hammer 1 is smaller than that of the sliding hammer 1, and the cross-sectional area of ​​the hammer head 2 is set to be circular. In the face of different sizes of pins, it is necessary to select a suitable hammer head 2, and the hammer head 2 and the sliding hammer 1 themselves need to have a certain degree of coordination, and setting the cross-sectional area of ​​the hammer head 2 to be circular is also a design that matches the cross-sectional area of ​​the pin.

[0031] See also Figures 1 to 3 The present application also discloses a method for using a tower crane pin removal device, which is applied to the above-mentioned sliding hammer device for removing the tower crane pin. The method comprises the following steps: S1: Fix the ring rail on the crossbar of the tower crane frame; S2: Install the electric hoist on the track of the ring track; S3: Use the hook of the electric hoist to hang the lifting lug of the sliding hammer and move the sliding hammer to the pin shaft that needs to be removed; S4: Place the sliding block of the sliding hammer into the channel steel in front of the standard section pin of the tower crane; S5: repeatedly push the slide hammer to hit the pin until the pin falls off from the pin hole; S6: After removing one pin shaft, use the electric hoist to move the slide hammer to the next pin shaft to be removed.

[0032] In the specific implementation process, before step S1, one end of the fixing rod is fixed on the ring rail with bolts; between step S4 and step S5, it also includes fixing hemp ropes on the ear plates on both sides of the sliding hammer, and pulling the hemp ropes to make the sliding hammer slide in the channel steel.

[0033] Embodiment: The present invention can be applied to the removal process of the standard section pin shaft of the R-generation tower crane of Zoomlion. The pin shaft of this tower crane has a large diameter and a long length, and the contact area of ​​the pin shaft in the shaft hole is large. In the previous disassembly work, it was disassembled by relying on traditional manual hammers, but the traditional manual hammers are very dependent on the accuracy and skilled skills of the installers. Despite this, there are still situations where manual hammers cannot be disassembled. Therefore, the current practice is to use a pin puller instead, but each use of the pin puller requires welding, so there is a safety risk of high-altitude fire, and the efficiency is very low, and the end face of the removed pin shaft will be damaged.

[0034] Therefore, under this premise, the scheme for pulling out the pins was improved. From August 29, 2024 to September 2, 2024, the present invention was applied to the main project of Zhenwen Mansion in Pingshan District, Shenzhen, and the standard section pin shaft of Zoomlion R generation tower crane (Zoomlion R275-12RB) was dismantled. The present invention first installed the ring rail 5 on the cross bar of the tower crane frame through the fixing rod 11 and locked it with bolts, and then installed the electric hoist 7 on the ring rail 5. The hook of the electric hoist 7 hangs the lifting ear 4 of the sliding hammer 1, and moves the electric hoist 7 along the ring rail 5 to move the sliding hammer 1 to the pin shaft to be removed, and then put the pulley 9 of the sliding hammer 1 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 sliding hammer with a hemp rope, pulled the hemp rope to make the sliding 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 shaft, the electric hoist 7 is used to lift the slide hammer 1 to move to the next pin shaft to be removed, and the operation is repeated until all the pin shafts are removed. In this removal process, the tower crane to be removed was installed with 23 standard sections, and the lifting height was 132.7 meters. The removal work originally planned to be completed in 8 days was completed in only 3 days after the application of the present invention. The invention not only provides a safe working environment for the installation and removal workers, but also greatly improves the removal efficiency of the pin shafts.

[0035] The advantages of the present invention are: 1. The present invention is designed with a ring rail, an electric hoist, a lifting lug and a sliding hammer. The horizontal position and vertical position of the sliding hammer can be continuously adjusted through the ring rail and the electric hoist, so that the moving range can cover all the pin positions of the standard section, which facilitates the disassembly of the pin.

[0036] 2. The present invention is designed with a sliding hammer, a sliding block, a pulley and an ear plate, and can use a hemp rope to connect the ear plate to apply tension to the sliding hammer, so that the sliding hammer can generate sufficient impact force in the channel steel through the pulley to complete the disassembly of the pin shaft.

[0037] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A dismantling device for a pin shaft of a tower crane, which is used for dismantling a pin shaft of a tower crane, and is 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 with a standard section channel steel, and a lifting lug is also provided on one side of the sliding hammer away from the sliding block; It also includes a ring rail, which is installed on the crossbar of the tower crane frame. The ring rail is equipped with a moving part connected to its track, and the moving part is connected to an electric hoist. The electric hoist 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: Ear plates for force-driven are installed on both sides of the slide hammer, and the ear plates are provided with at least one force-receiving hole.

3. A device for removing a 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. A 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 removal device for a 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 the 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.

7. A method for using the device for disassembling a pin shaft of a tower crane according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Fix the ring rail on the crossbar of the tower crane frame; S2: Install the electric hoist on the track of the ring track; S3: Use the hook of the electric hoist to hang the lifting lug of the sliding hammer and move the sliding hammer to the pin shaft that needs to be removed; S4: Place the sliding block of the sliding hammer into the channel steel in front of the standard section pin of the tower crane; S5: repeatedly push the slide hammer to hit the pin until the pin falls off from the pin hole; S6: After removing one pin shaft, use the electric hoist to move the slide hammer to the next pin shaft to be removed.

8. The method for using the slide hammer device for removing the pin shaft of a tower crane according to claim 7, characterized in that: Before step S1, one end of the fixing rod is fixed to the ring rail by bolts.

9. The method for using the slide hammer device for dismantling a pin shaft of a tower crane according to claim 7, characterized in that: Between step S4 and step S5, the method further includes fixing hemp ropes on the ear plates on both sides of the slide hammer, and pulling the hemp ropes to make the slide hammer slide in the channel steel.

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