Self-dismounting device for suspension arm of small roof crane

Abstract

The utility model discloses a suspension arm self-dismounting device of a small roof crane. The suspension arm self-dismounting device comprises a support, a pulley arranged on the support, an end fixing device arranged on the support and used for fixing, a front limiting clamping groove formed in the front end of the support, a side limiting clamping groove formed in the side face of the support, and a limiting clamping plate connected with the front limiting clamping groove or the side limiting clamping groove in an inserted mode. The nylon pulley arranged on the support is matched with a main lifting rope of an original roof crane, the main lifting rope can be conveniently used for lowering the detached lifting arm, the detached lifting arm can be directly placed on the ground under the permitted condition, the work of manually carrying the lifting arm to a construction elevator is omitted, and the detaching efficiency is greatly improved. The plug pin and the limiting clamping plate are main restraining parts, so that the self-dismounting device can be safely fixed on the suspension arm; the U-shaped bolt is an additional safety measure and can play a protection role when the plug pin and the limiting clamping plate fail, and the self-dismounting device is prevented from being separated from the suspension arm; the whole self-dismounting device is light in weight and convenient for operators to carry and move.

Description

Technical Field

[0001] The utility model belongs to the technical field of roof cranes, and particularly relates to a boom self-disassembly device for a small roof crane. Background Technique

[0002] Roof cranes are commonly used for the demolition of large towers and the hoisting finishing work in the final stage of super high-rise construction. After the project is completed, manual demolition is required. During the disassembly process, the disassembly of the boom is the most difficult task because the boom is relatively long and usually extends beyond the roof structure. Moreover, some roof cranes are equipped with tower bodies, making the roof crane higher than the roof plane. The conventional method of lowering the boom to the roof for disassembly cannot be implemented. Therefore, the boom needs to be disassembled in the air, and thus an auxiliary device for boom self-disassembly is designed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a boom self-disassembly device for a small roof crane to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a boom self-disassembly device for a small roof crane, including a bracket, a pulley is arranged on the bracket, an end fixing device for fixing is arranged on the bracket, a front limit card slot is arranged at the front end of the bracket, and a side limit card slot is arranged on the side of the bracket. The limit card plate is inserted into the front limit card slot or the side limit card slot.

[0005] Preferably, the end fixing device includes two groups of clamping plates, and two clamping plates are arranged on each side of the bracket respectively, and pins are arranged on the clamping plates.

[0006] Preferably, an auxiliary fixing device is further arranged on the bracket.

[0007] Preferably, the auxiliary fixing device is set as a U-shaped bolt.

[0008] Preferably, the bracket includes a U-shaped frame and a pulley support frame, the pulley support frame is arranged on the U-shaped frame, and the pulley is arranged on the pulley support frame.

[0009] Preferably, a reinforcing rod is further connected between the U-shaped frame and the pulley support frame.

[0010] The technical effects and advantages of the utility model: the boom self-disassembly device is composed of a bracket and some accessories. The nylon pulley equipped on the bracket matches the main lifting rope of the original roof crane, which is convenient for using the main lifting rope to lower the boom during disassembly. Under permitted conditions, the removed boom can be directly placed on the ground, saving the work of manually transporting it to the construction elevator, and greatly improving the disassembly efficiency;

[0011] The bolt and the limit clamping plate are the main constraint components, which can securely fix the self - disassembling device on the boom; the U - bolt is an additional safety measure that can play a protective role when the bolt and the limit clamping plate fail, preventing the self - disassembling device from detaching from the boom;

[0012] The entire self - disassembling device is light in weight, facilitating the operation personnel to carry and move it. Description of the Drawings

[0013] Figure 1 Schematic structural diagram of the boom self - disassembling device of the small - sized roof crane of the present utility model;

[0014] Figure 2 Schematic structural diagram of the installation structure of the temporary cable of the present utility model;

[0015] Figure 3 Schematic structural diagram of the initial installation position of the boom self - disassembling device of the present utility model;

[0016] Figure 4 Schematic structural diagram of the installation structure of the bolt of the present utility model;

[0017] Figure 5 Schematic structural diagram of the installation structure of the limit clamping plate of the present utility model;

[0018] Figure 6 Schematic structural diagram of the installation structure of the U - bolt of the present utility model;

[0019] Figure 7 Schematic structural diagram of the installation structure of the main hoisting rope of the present utility model;

[0020] Figure 8 Schematic diagram of the separation of the head boom and the boom of the present utility model;

[0021] Figure 9 Schematic diagram of the complete separation of the head boom of the present utility model;

[0022] Figure 10 Schematic structural diagram of the transfer of the boom self - disassembling device of the present utility model;

[0023] Figure 11 Schematic structural diagram of the disassembly of the second boom of the present utility model;

[0024] Figure 12 Schematic diagram of using the luffing rope to replace the temporary cable to fix the boom and continue the demolition work of the present utility model;

[0025] Figure 13 Schematic diagram of using the chain block to replace the luffing rope to fix the boom and continue the demolition work of the present utility model. Detailed Description of the Invention

[0026] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] The utility model provides Figure 1 The self-disassembly device of the boom of a small roof crane shown in the figure comprises a bracket 1, wherein the bracket 1 is composed of a U-shaped frame and a pulley support frame, the pulley support frame is welded to the middle part of the front end of the U-shaped frame at an angle to the front side, and the pulley 5 is arranged on the pulley support frame; reinforcing rods are welded and connected to the two sides of the rear end of the U-shaped frame and the upper end of the pulley support frame, and end fixing devices for fixing are arranged at the rear ends of both sides of the bracket 1, and the end fixing devices include two groups of clamping plates 8, each group of clamping plates 8 is provided with two and are respectively arranged on both sides of the bracket 1, and pins 2 are arranged on the clamping plates 8; front limit slots 6 are arranged on both sides of the front end of the bracket 1, and side limit slots 7 are arranged at the front end of the side of the bracket 1, and the front limit slots 6 or the side limit slots 7 are inserted into the limit clamping plates 3.

[0028] Specifically, an auxiliary fixing device is also provided on the bracket 1; the auxiliary fixing device is configured as a U-shaped bolt 4.

[0029] The utility model also provides a method for self-disassembly of a boom of a small roof crane, comprising the following steps:

[0030] 1) Install the temporary cable 11, and lower the boom until the temporary cable 11 is pulled by force. Figure 2 As shown;

[0031] 2) Install the boom self-disassembly device at the node near the front end of the second section of the boom head, such as Figure 3 The specific method is: insert the limit card plate 3 into the front limit card slot 6, and it is located on one side of the boom belly rod 13, insert the pin 2 on the card plate 8, and the pin 2 is located on the lower side of the boom main chord 12, one end of the pin 2 is fixed by the R-type pin 9, and the U-bolt 4 connects the boom belly rod 13 and the bracket 1. For specific installation methods, see Figures 4 - 6 .

[0032] 3) Pass the main lifting rope 14 through the pulley 5, use the main lifting rope 14 to connect the lifting rope 15 to fix the lower chord of the head boom, and use the hand chain hoist 16 to pull the belly rod near the root of the head boom. Figure 7 As shown; initially tighten the main hoist rope 14, then disassemble the upper chord connecting pin and the lower chord connecting pin of the boom in sequence; then slowly release the main hoist rope 14, and release the hand chain hoist 16 synchronously. The operator slowly pushes out the head boom to disengage the boom joint, and regulates the release of the main hoist rope 14 and the hand chain hoist 16, as shown in FIG.Figure 8 As shown, completely disengage the boom, as Figure 9 shown; after the boom is completely lowered and disengaged, the main hoist can be used to place it on the tower dismantling platform or directly on the ground.

[0033] 4) Transfer the boom self-dismantling device to the next boom node and fix it; the specific method is: remove the U-bolt 4 to release the fixation between the bracket and the web member, transfer the limit clamping plate to the side limit slot 7, and pull out the pin 2; transfer the bracket to the next boom node and complete each fixing measure in sequence; as Figure 10 shown;

[0034] 5) Dismantle the second section of the head boom according to step 3), as Figure 11 shown;

[0035] 6) Repeat steps 4) and 5) until the position of the temporary cable;

[0036] 7) Use the luffing rope to hold the fifth section of the boom, remove the temporary cable 11, and then continue to dismantle the boom to the fifth section using the auxiliary bracket; as Figure 12 shown;

[0037] 8) Use the chain block 16 to hold the third section of the boom, and use the boom self-dismantling device to dismantle the boom in front of the fixing point of the chain block 16, as Figure 13 shown;

[0038] 9) The last three sections of the boom are quickly dismantled using the gin pole of the small roof crane.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A boom self-disassembly device for a small roof crane, characterized in that: It includes a bracket, on which a pulley is provided, and an end fixing device for fixing is provided on the bracket. A front limit card slot is provided at the front end of the bracket, and a side limit card slot is provided on the side of the bracket. The limit card plate is inserted into the front limit card slot or the side limit card slot.

2. The boom self-disassembly device of a small roof crane according to claim 1, characterized in that: The end fixing device includes two groups of card plates. Each group of card plates has two card plates respectively arranged on both sides of the bracket, and pins are provided on the card plates.

3. The self-disassembling device for the boom of a small roof crane according to claim 1, characterized in that: An auxiliary fixing device is also provided on the bracket.

4. The boom self-disassembly device of a small roof crane according to claim 3, characterized in that: The auxiliary fixing device is set as a U-bolt.

5. The boom self-dismantling device of a small roof crane according to claim 1, characterized in that: The bracket includes a U-shaped frame and a pulley support frame. The pulley support frame is arranged on the U-shaped frame, and the pulley is arranged on the pulley support frame.

6. The boom self-disassembly device of a small roof crane according to claim 5, characterized in that: Reinforcing bars are also connected to the U-shaped frame and the pulley support frame.

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