CN101670985A - Electric transmission line iron tower erection tower crane with flexible base and flexible adhesion - Google Patents

Abstract

The invention relates to a transmission line iron tower erection tower crane with a flexible foundation and flexible attachment, which is used for the erection and construction of the iron tower of the transmission line. The bottom of the crane sits on the simple foundation in the center of the tower, and connects the four foundations of the tower through the foundation stay wires, which form an angle of 40° to 50° with the horizontal plane. The simple base and the basic guy wire together constitute the flexible foundation of the crane. After the iron tower is erected to a certain height, the main materials on each side of the iron tower are connected to the tower body of the crane through the attached stay wires to form the flexible attachment of the crane. The number of attachments is determined according to the height of the tower and the attachment spacing of the cranes. The simple base is generally composed of road logs laid on sand and gravel, and the basic guy wires and attached guy wires are made of wire rope pulley blocks.

Description

Transmission line iron tower erection tower crane with flexible foundation and flexible attachment

technical field

The invention relates to the technical field of power transmission line construction, in particular to a power transmission line iron tower erection tower crane with flexible foundation and flexible attachment, which is used for the erection and construction of electric transmission line iron towers.

Background technique

At present, domestic transmission line construction iron tower construction mainly adopts pole-holding construction, while the tower cranes commonly constructed in China use rigid concrete foundations and rigid support rods for attachment. The previous fixed foundations and rigid attachments are expensive to manufacture and cannot reuse. For example, the Chinese patent application 200810114263.X of the same applicant as the present invention discloses a special-purpose tower crane for arranging towers with a movable arm type, and its content is introduced here to illustrate and explain other parts of the present invention. What this application uses is still The fixed rigid concrete foundation and rigid strut attachment have the disadvantages of complicated and difficult installation, high construction strength and low efficiency. According to the characteristics of iron tower construction, the tower crane with flexible foundation and flexible attachment is more suitable for the requirements of iron tower erection construction.

Contents of the invention

Therefore, the purpose of the present invention is to overcome the shortcomings of the prior art that installation is complex and difficult, the construction strength is high, and the efficiency is not high, and to provide a tower crane with flexible foundation and flexible attachment for the erection of iron towers for transmission lines. The wire rope pulley block of the tower crane is a common construction tool on the construction site, which can be used repeatedly. The construction method is convenient and simple, the efficiency is greatly improved, and the use cost can be saved.

To achieve the above object, the present invention takes the following technical solutions:

A transmission line iron tower erection tower crane with a flexible foundation and flexible attachment, the crane is used for the erection construction of the transmission line iron tower, characterized in that the crane includes a simple foundation 1, a foundation guy wire 2, a tower body 3, and an attached guy wire 4. Jacking mechanism 5, lifting mechanism 6, slewing mechanism 7, slewing turntable 8, boom 9, tower cap 10 and luffing mechanism 11, the tower body 3, slewing turntable 8, boom 9 and tower cap 10 The jacking mechanism 5 and the hoisting mechanism 6 are installed on the tower body 3 through pin connection, and the slewing mechanism 7 and luffing mechanism 11 are installed on the slewing turntable 8 .

Wherein, the simple foundation 1 is composed of road logs laid on sand and gravel, and the foundation stay wire 2 is composed of a wire rope pulley block. The simple foundation 1 and the foundation stay wire 2 together constitute the flexible foundation of the crane. The material 12 is connected with the tower body 3 of the crane, which constitutes the flexible attachment of the crane, wherein the attached stay wire 4 is composed of a wire rope pulley block.

Wherein, the slewing mechanism 7 includes a reduction motor with gears.

Wherein, the jacking mechanism includes a hydraulic oil cylinder and its supporting upper and lower cross beams.

The present invention also provides a construction method for erecting transmission line iron towers using the above-mentioned crane, comprising the following steps:

(1) pouring the iron tower foundation 13 of the transmission line, and prefabricating a simple foundation 1;

(2) The lower structure of the crane is installed, the bottom of the tower body 3 is directly seated on the simple foundation 1, and the tower body 3 is connected and tensioned with the four foundations 13 of the iron tower through four foundation guy wires 2, and the foundation guy wires 2 are formed with the horizontal plane. The angle of 40°～50°, the simple foundation 1 and the four foundation cables 2 together constitute the flexible foundation of the crane. After the lower structure of the crane is installed, the upper structure of the crane: the jacking mechanism 5, the lifting mechanism 7. After the installation of the slewing turntable 8, the boom 9, the tower cap 10 and the luffing mechanism 11 is completed, then use the jacking mechanism 5 of the crane to lift the upper structure of the crane upward, so that the crane can rise to the maximum self-supporting height of the crane;

(3) Use the hoisting mechanism 6 of the crane, the slewing mechanism 7, and the luffing mechanism 11 to set up the iron tower until the hoisting height of the crane cannot meet the needs of the iron tower erection construction. The tower body 3 of the crane is connected to form the first flexible attachment of the crane. The lifting mechanism 5 of the crane is used to lift up the crane again until the height allowed by the crane, and continue to assemble and install the iron tower. When the lifting height of the crane cannot meet the requirements of the iron tower When needed for assembly, repeat step (3), and connect the main material 10 on each side of the iron tower with the tower body 3 of the crane through the added attachment stay wire 4 to form the nth flexible attachment of the crane, where n is a natural number until the iron tower assembly After the vertical installation is completed, the number n of flexible attachments set is determined according to the height of the iron tower and the attachment distance of the crane;

(4) After the tower is installed and inspected, remove the crane.

The beneficial effect of the present invention is that: the flexible foundation and the flexible attached steel tower erection tower crane are adopted, the characteristics of the iron tower are fully utilized, and it is more suitable for the needs of the transmission line iron tower erection. The original fixed foundation and rigid attachment processing cost are high and cannot be reused. The flexible foundation and flexible attachment are composed of a wire rope pulley block. The wire rope pulley block is a common construction tool on the construction site. It can be reused, the construction is convenient and simple, and the efficiency is greatly improved. The use of flexible foundation and flexible attachment can save a large construction cost for the construction unit.

Description of drawings

Fig. 1-3 is the overall structure of the crane of the present invention and the schematic diagram of each construction stage of erecting and installing iron tower;

Fig. 4 is the partially enlarged schematic view of the rotary turntable of the crane of the present invention;

Fig. 5 is a partially enlarged schematic view of the jacking mechanism of the crane of the present invention.

The numbers represent: 1 simple foundation 2 basic guy wire 3 crane tower body 4 attached guy wire 5 jacking mechanism 6 hoisting mechanism 7 slewing mechanism 8 slewing turntable 9 boom 10 tower cap 11 luffing mechanism 12 iron tower main material 13 iron tower foundation.

Detailed ways

As shown in Fig. 1-3, it is the schematic diagram of the overall structure and the various construction stages of erecting and installing the iron tower of the transmission line iron tower erecting tower crane with flexible foundation and flexible attachment of the present invention, and this crane is made up of simple foundation 1, foundation pull wire 2. Crane tower body 3, attached guy wire 4, jacking mechanism 5, hoisting mechanism 6, slewing mechanism 7, slewing turntable 8, boom 9, tower cap 10, luffing mechanism 11 and other parts. For some well-known components that are not the invention point of the present invention, no detailed description will be given here. For specific parts, please refer to the description of the Chinese patent application 200810114263.X of the same applicant as the present invention. And be used for explaining the parts of the present invention.

The crane tower body 3 is composed of multi-section tower body sections, including accessories such as rest platforms and ladders. The tower sections are connected by pin shafts. The crane tower body can bear great anti-torsion and anti-extrusion force. The jacking mechanism 5 mainly includes a hydraulic jacking cylinder, upper and lower cross beams. Through the extension and contraction of the jacking hydraulic oil cylinder and the installation of the tower body section, the addition (subtraction) of the tower body section of the crane tower body 3 is realized, thereby realizing the height required for the crane to work. The hoisting mechanism 6 is used as a power system for lifting (lowering) the hoisting weight of the tower crane, and the system can provide different lifting (lowering) speeds according to the size of the hoisting weight. The slewing mechanism 7 is mainly composed of a slewing motor, which can realize the rotation of the upper structure of the slewing turntable 8, thereby realizing the rotation of the boom 9 and the lifting weight around the crane tower body 3. The slewing turntable 8 is connected to the crane tower body 3, the boom 9 and the tower cap 10 through a pin shaft, and the slewing mechanism 7 and the luffing mechanism 11 are also installed thereon. The boom 9 is formed by connecting multi-section boom sections welded by high-strength steel pipes through pin shafts. The tower cap 10 is a welded piece of steel structure, which is connected to the rotary table 8 through a pin shaft, and is equipped with a luffing pulley block and a boom buffer device. The luffing mechanism 11 is used to realize the pitching of the boom so as to meet the requirements of different turning radii.

During construction, the bottom of the tower body 3 is directly seated on the simple foundation 1, and the four foundations 13 of the iron tower are connected and tensioned with the tower body 3 of the crane through four foundation stay wires 2, and the stay wires are at 40° to 50° to the horizontal plane. horn. The simple foundation 1 and the foundation guy wire 2 together constitute the flexible foundation of the crane. After the iron tower is erected to a certain height, the main material 12 of the iron tower is connected to the tower body 3 of the crane by attaching the stay wire 4 to form the flexible attachment of the crane. The simple foundation 1 is formed by laying road logs on sand and gravel, and the basic stay wire 2 and the attached stay wire 4 are formed by a wire rope pulley block. After completing the installation of the lower part of the crane, the crane can be lifted upwards by the jacking mechanism 5 to allow the installation height of the crane. The crane realizes the installation of the iron tower through the hoisting mechanism 6, the slewing mechanism 7 and the luffing mechanism 11.

The construction steps of the crane tower are as follows:

(1) pouring the iron tower foundation 13 of the transmission line, and prefabricating a simple foundation 1;

(2) The lower structure of the crane is installed, the bottom of the tower body 3 is directly seated on the simple foundation 1, and the tower body 3 is connected and tensioned with the four foundations 13 of the iron tower through four foundation guy wires 2, and the foundation guy wires 2 are formed with the horizontal plane. The angle of 40°～50°, the simple foundation 1 and the four foundation cables 2 together constitute the flexible foundation of the crane. After the lower structure of the crane is installed, the upper structure of the crane: the jacking mechanism 5, the lifting mechanism 7. After the installation of the slewing turntable 8, the boom 9, the tower cap 10 and the luffing mechanism 11 is completed, then use the jacking mechanism 5 of the crane to lift the upper structure of the crane upward, so that the crane can rise to the maximum self-supporting height of the crane;

(3) Use the hoisting mechanism 6 of the crane, the slewing mechanism 7, and the luffing mechanism 11 to set up the iron tower until the hoisting height of the crane cannot meet the needs of the iron tower erection construction. The tower body 3 of the crane is connected to form the first flexible attachment of the crane. The lifting mechanism 5 of the crane is used to lift up the crane again until the height allowed by the crane, and continue to assemble and install the iron tower. When the lifting height of the crane cannot meet the requirements of the iron tower When needed for assembly, repeat step (3), and connect the main material 10 on each side of the iron tower with the tower body 3 of the crane through the added attachment stay wire 4 to form the nth flexible attachment of the crane, where n is a natural number until the iron tower assembly After the vertical installation is completed, the number n of flexible attachments set is determined according to the height of the iron tower and the attachment distance of the crane;

(4) After the tower is installed and inspected, remove the crane.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims (5)

1. A transmission line iron tower erecting tower crane with a flexible foundation and flexible attachment, the crane is used for the erection construction of the transmission line iron tower, and it is characterized in that the crane includes a simple foundation 1, a foundation guy wire 2, a tower body 3, Attached to the stay wire 4, the jacking mechanism 5, the hoisting mechanism 6, the slewing mechanism 7, the slewing turntable 8, the boom 9, the tower cap 10 and the luffing mechanism 11, the tower body 3, the slewing turntable 8, the boom 9 and the tower The caps 10 are connected by pin shafts, the jacking mechanism 5 and the lifting mechanism 6 are installed on the tower body 3 , and the turning mechanism 7 and the luffing mechanism 11 are installed on the turning disk 8 . 2. The crane according to claim 1, characterized in that the simple foundation 1 is formed by laying logs on sand and gravel, the foundation stay wire 2 is composed of a wire rope pulley block, and the simple foundation 1 and the foundation stay wire 2 together constitute the crane’s The flexible foundation uses the attached stay wire 4 to connect the main material 12 of the iron tower with the tower body 3 of the crane to form a flexible attachment of the crane, wherein the attached stay wire 4 is composed of a wire rope pulley block. 3. The crane according to claims 1-2, characterized in that the slewing mechanism 7 comprises a geared motor. 4. The crane according to claims 1-3, characterized in that the jacking mechanism includes a hydraulic cylinder and its associated upper and lower cross beams. 5. A construction method for erecting transmission line iron towers using the crane described in claims 1-4, comprising the following steps: (1) pouring the iron tower foundation 13 of the transmission line, and prefabricating a simple foundation 1; (2) The lower structure of the crane is installed, the bottom of the tower body 3 is directly seated on the simple foundation 1, and the tower body 3 is connected and tensioned with the four foundations 13 of the iron tower through four foundation guy wires 2, and the foundation guy wires 2 are formed with the horizontal plane. The angle of 40°～50°, the simple foundation 1 and the four foundation cables 2 together constitute the flexible foundation of the crane. After the lower structure of the crane is installed, the upper structure of the crane: the jacking mechanism 5, the lifting mechanism 7. After the installation of the slewing turntable 8, the boom 9, the tower cap 10 and the luffing mechanism 11 is completed, then use the lifting mechanism 5 of the crane to lift the upper structure of the crane upwards, so that the crane rises to the maximum self-supporting height of the crane; (3) Use the hoisting mechanism 6 of the crane, the slewing mechanism 7, and the luffing mechanism 11 to set up the iron tower until the hoisting height of the crane cannot meet the needs of the iron tower erection construction. The tower body 3 of the crane is connected to form the first flexible attachment of the crane. The lifting mechanism 5 of the crane is used to lift up the crane again until the height allowed by the crane, and continue to assemble and install the iron tower. When the lifting height of the crane cannot meet the requirements of the iron tower When needed for assembly, repeat step (3), and connect the main material 10 on each side of the iron tower with the tower body 3 of the crane through the added attachment stay wire 4 to form the nth flexible attachment of the crane, where n is a natural number until the iron tower assembly After the vertical installation is completed, the number n of flexible attachments set is determined according to the height of the iron tower and the attachment distance of the crane; (4) After the tower is installed and inspected, remove the crane.

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