Adjustable embedded supporting leg device of tower crane

Abstract

The utility model relates to the technical field of tower crane installation, and particularly discloses a tower crane adjustable pre-embedded supporting leg device which comprises supporting legs, a jacking plate, an adjusting screw rod, an adjusting block, a limiting pipe and a bottom plate, the jacking plate is horizontally welded to the bottoms of the supporting legs, the vertical adjusting screw rod is welded to the middle axis of the lower portion of the jacking plate, and the outer portion of the adjusting screw rod is in threaded connection with the adjusting block; a limiting pipe is vertically placed on the ground, a bottom plate is horizontally welded to the bottom of the limiting pipe, and the lower end of an adjusting screw is in threaded connection with the interior of the limiting pipe. According to the scheme, the problem that existing embedded supporting legs are high in precision adjusting difficulty can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tower crane installation, in particular to an adjustable embedded leg device of a tower crane. Background Art

[0002] The positioning of embedded parts is the first step in tower crane installation. How to determine the positioning of embedded parts determines whether the subsequent installation and use meet the needs. After embedding, the tower crane foundation must ensure its horizontality during pouring, otherwise it will directly affect the verticality of the tower crane after installation and cause the foundation to be scrapped. The traditional tower crane leg embedding construction has great inconvenience. The elevation of each leg is controlled by a level and a tower ruler. Wedges, steel sheets and other auxiliary materials are placed under the embedded legs to level each leg. Since there is no accuracy standard for auxiliary materials such as wedges and steel sheets, they can only rely on the measurement results to repeatedly adjust and replace the embedded legs until the accuracy reaches the accuracy requirement of 1 / 1000 of the tower body. In this way, the leveling accuracy is difficult to control and takes too long.

[0003] In addition, due to the variety of tower crane types on the market, there are contradictions in the selection of tower crane models. Because the personnel turnover in the construction industry is strong and the professional subcontractors are mixed, some problems are easy to occur in the cooperation between the two, such as the wrong model is selected, and the model needs to be replaced for economic benefits. For example, the foundation of the tower crane is completed and the legs are pre-buried, but it is found that there is no tower crane to install. Under the pressure of the construction period, other tower cranes of the same tonnage have to be considered for replacement, etc., and the pre-buried legs of different tower cranes are different. It is difficult to change and adjust the legs after they are pre-buried. The existing leg part adopts the method of welding an extension column under the leg to raise the height of the entire leg. Since the extension column has been processed into a fixed size, it can only meet a certain fixed height after being welded under the leg, and the overall height of the leg cannot be freely adjusted, and the adaptability range is limited.

[0004] Therefore, according to the actual construction situation, it is urgent to propose an adjustable embedded leg device to solve the problem that the existing embedded leg precision adjustment is difficult. Utility Model Content

[0005] The utility model provides an adjustable embedded leg device for a tower crane, so as to solve the problem that the embedded legs of the existing tower crane are difficult to adjust in terms of accuracy.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0007] The basic scheme of this scheme is: an adjustable embedded leg device for a tower crane, including a leg adapted to the crane, a horizontal top supporting plate fixed to the bottom surface of the leg, an adjusting screw vertically fixed at the center of the bottom surface of the top supporting plate, a vertical limiting tube provided at the lower end of the adjusting screw, an adjusting block connected to the external thread of the adjusting screw, the adjusting block being located above the limiting tube, and the adjusting screw movably connected in the limiting tube.

[0008] The beneficial effects of this program are:

[0009] 1. The existing embedded feet have a fixed height. When adjusting the height of multiple embedded feet, it is necessary to repeatedly adjust the steel sheets and wedges placed under the embedded feet, which makes the adjustment difficult. This solution installs a height adjustment component under the embedded feet, and uses a threaded connection between the screw and the adjustment block. When adjusting the height, the adjustment block is used to contact the top wall of the limit tube, and the height is controlled by the distance between the adjustment block and the top of the screw to fix the feet. The adjustment method is simple and the adjustment accuracy is high.

[0010] 2. In order to match the depth of the foundation pit, the existing pre-buried branch pipes have extension columns welded at the bottom of the legs to meet the installation of the tower crane. However, the extension columns are fixed in height and cannot be adapted to different construction sites. Moreover, after the extension columns are welded on the legs, once the tower crane model needs to be replaced, the legs cannot be changed and can only be scrapped, increasing the construction cost. The limit tubes and adjustment screws provided in this solution are detachable connection methods. Once the leg model is changed, the legs can be replaced without the need for re-construction and pre-buried.

[0011] Furthermore, the limit tube is threadedly connected to the adjusting screw rod. The adjusting screw rod matches the adjusting screw rod thread through the internal thread of the limit tube, so as to realize stepless adjustment of the whole support leg, make the connection tighter, and ensure the stability of the support leg installation.

[0012] Furthermore, the top supporting plate, the adjusting screw rod and the limiting tube are all coaxially arranged to ensure the verticality of the entire embedded support leg.

[0013] Furthermore, a bottom plate is horizontally arranged at the bottom end of the position limiting tube, so as to increase the contact area between the position limiting tube and the horizontal bottom surface.

[0014] Furthermore, through holes are opened on the four vertices of the bottom plate, and the through holes allow the pins to pass through to fix the entire limiting tube.

[0015] Furthermore, the adjusting block is in the shape of a ring, and two oppositely arranged planes are provided on the circumferential surface of the adjusting block to facilitate the use of a wrench tool to twist the adjusting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the installation of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] The reference numerals in the drawings of the specification include: a support leg 1, a limiting tube 2, a base plate 3, an adjusting screw 4, a top supporting plate 5, and an adjusting block 6.

[0020] The embodiment is basically as shown in the attached Figure 1 To Attachment Figure 2 As shown:

[0021] The utility model discloses an adjustable pre-buried outrigger device for a tower crane, which comprises an outrigger 1, a top supporting plate 5, an adjusting screw rod 4, a limiting tube 2 and a bottom plate 3 from top to bottom.

[0022] The legs are pre-buried legs for supporting tower cranes. The legs are arranged vertically. The bottom surface of the legs is flat. A top support plate 5 is welded to the bottom surface of the legs. The top support plate 5 is made of steel plate. The top surface of the top support plate 5 is fitted with the bottom surface of the legs and arranged coaxially. An adjusting screw 4 is welded below the top support plate 5. An external thread is provided at the lower end of the adjusting screw 4. Several adjusting blocks 6 are threadedly connected on the outer wall of the adjusting screw 4. In this embodiment, the number of adjusting blocks is 3. Each adjusting block 6 can move up and down along the adjusting screw. Before assembly, the adjusting block can be freely removed from the lower end of the adjusting screw 4. However, after being assembled in the limiting tube 2, the range of movement of the adjusting block 6 is always higher than the upper end of the limiting tube. The adjusting block 6 is in the shape of a ring. Two oppositely arranged planes are processed on the circumferential surface of the adjusting block 6 to facilitate the use of tools such as wrenches to twist the adjusting block 6.

[0023] The lower end of the adjusting screw 4 is sleeved in the limiting tube 2, and the limiting tube 2 is vertically installed on a horizontal plane. The lower end of the limiting tube 2 is welded to the bottom plate 3, and through holes are opened on the four vertices of the bottom plate 3. The through holes can be used for the pins to pass through to fix the entire embedded leg device. The bottom plate 3 is used to increase the contact area between the entire leg device and the ground, which is convenient for the stable placement of the device. An internal thread is opened on the inner wall of the limiting tube 2, and the internal thread matches the external thread at the lower end of the adjusting screw 4, so that the height of the adjusting screw 4 can be adjusted up and down in the limiting tube 2. Since the threaded connection between the screw and the limiting tube 2 is steplessly adjustable, the adjustment accuracy of the entire embedded leg is high and the adjustment method is convenient.

[0024] The specific implementation process is as follows:

[0025] The limiting tube 2 is vertically welded to the center of the bottom plate 3. Multiple groups of limiting tubes 2 and bottom plates 3 are made according to the tower crane installation requirements. Each limiting tube 2 and bottom plate 3 is horizontally placed in the reserved foundation pit. After adjusting the spacing, the limiting tube 2 and bottom plate 3 are cast. The casting height is lower than the top opening of the limiting tube 2. After the casting solidifies, multiple groups of adjusting screws 4, top support plates 5, and adjusting blocks 6 are prepared. The adjusting blocks 6 are threadedly sleeved on the outside of the adjusting screws 4, and then the top support plates 5 are horizontally coaxially welded on the top of the adjusting screws 4. The surface of the top support plates 5 is aligned and in contact with the bottom surface of the legs, and the legs are welded as a whole on the top support plates 5. After welding is completed, the adjusting screws 4 are threadedly connected to the inner threads of each limiting tube 2, and the height of the legs is adjusted according to the construction requirements to ensure that the heights of the legs are the same, and the accuracy is less than 1 / 1000 of the tower height. Then rotate the adjustment blocks to the lower end of the adjustment screws, so that the adjustment blocks touch the top wall of the limit tube, and use the outer edge of the adjustment blocks to lock the adjustment screws. Multiple adjustment blocks can also limit each other to reduce the possibility of loosening and falling off. Figure 2 As shown, the pre-embedding work of the legs of the tower crane is completed in this way, and the subsequent tower body erection work can be carried out.

[0026] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An adjustable embedded outrigger device for a tower crane, comprising an outrigger adapted to the crane, characterized in that: A horizontal top supporting plate is fixed to the bottom surface of the support leg, an adjusting screw is vertically fixed at the center of the bottom surface of the top supporting plate, a vertical limiting tube is provided at the lower end of the adjusting screw, an adjusting block is connected to the external thread of the adjusting screw, the adjusting block is located above the limiting tube, and the adjusting screw can be movably connected in the limiting tube.

2. The adjustable embedded outrigger device for a tower crane according to claim 1, characterized in that: The inner wall of the position limiting tube is provided with an internal thread matching the adjusting screw rod, and the lower end of the adjusting screw rod can be threadedly connected in the position limiting tube.

3. The adjustable embedded outrigger device for a tower crane according to claim 2, characterized in that: The top supporting plate, the adjusting screw rod and the limiting tube are all coaxially arranged.

4. The adjustable embedded outrigger device for a tower crane according to claim 3, characterized in that: A bottom plate is horizontally arranged at the bottom end of the limiting tube.

5. The adjustable embedded outrigger device for a tower crane according to claim 4, characterized in that: Through holes are formed on the four vertices of the bottom plate, and the pins are passed through the through holes to fix the limiting tubes.

6. The adjustable embedded outrigger device for a tower crane according to claim 5, characterized in that: The adjusting block is in the shape of a ring, and two oppositely arranged planes are arranged on the circumferential surface of the adjusting block, so as to facilitate the use of a wrench tool to twist the adjusting block.

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