CN116639606A - A parallel connection form and installation method of double jib frames of a tower crane - Google Patents

Abstract

The invention provides a connection form and an installation method for parallel connection of double-arm frames of a tower crane, and belongs to the technical field of arm frame connection; the problems of high processing and transportation difficulty, complex installation procedure, high potential safety hazard and inclination of the arm support to one side after the installation is completed are solved; the technical proposal is as follows: an upper connecting lug seat I and a lower connecting lug plate I are arranged on the left side arm section, an upper connecting lug seat II and a lower connecting lug plate II are arranged on the right side arm section, and the lower connecting lug plate I and the lower connecting lug plate II are connected through a lower connecting rod; the installation method comprises the following steps: s1, connecting the upper parts of the left side arm section and the right side arm section in parallel; s2, assembling the left side arm section and the right side arm section on the ground; s3, mounting the left and right side arm sections on the main body arm frame; s4: the invention has the beneficial effects that the lifting equipment is evacuated and installed, and the lifting equipment is provided with the following beneficial effects: the processing and transportation difficulty is small, the installation procedure is simple, the condition of skimming to one side can not occur after the arm support is installed, and the quality of products is improved.

Description

A parallel connection form and installation method of double jib frames of a tower crane

technical field

The invention relates to the technical field of jib connection and installation, in particular to a connection form and installation method of parallel connection of double jibs of a tower crane.

Background technique

Tower cranes are commonly used hoisting equipment in construction, wind power and nuclear power construction; with the development of large-scale, modular and intensive construction projects, super-large tower cranes have become a development trend; super-large tower cranes have a high operating height , large hoisting weight, and long operating range. Similarly, super large tower cranes are also larger in size. In order to meet the corresponding lifting performance, super large tower cranes need to use large cross-section jibs. Considering the difficulty and cost of raw material procurement, processing and manufacturing, transportation and installation, use and maintenance, site storage, etc., the form of left and right double booms has become a development trend. The double booms do not operate in isolation, but are organically combined through a certain connection structure form a whole.

As shown in Figure 6 and Figure 7, the traditional double-arm connection form of tower cranes is to increase the overall connection joint between the ends of the front and rear booms, so as to increase the overall length and stability of the boom, and effectively prevent the left and right side loads of the boom When the vertical and lateral dislocation occurs, so as to realize the parallel connection of the left and right booms; but with the increase of lifting performance, the section of the boom needs to be increased, and the width and height of the overall connecting joint connecting the front and rear booms will increase accordingly, resulting in processing The difficulty of manufacturing, transportation and installation is greatly increased. At the same time, this "segmented" connection method will also lead to weak stability of the boom.

In addition, during the installation process of the double arms of the traditional tower crane, the left and right side arm sections cannot be installed on the ground first, and then installed on the main arm frame through the lifting equipment, because the additional integral connection sections make the The weight of the entire boom section is greatly increased. At present, the existing domestic lifting equipment cannot be lifted. The traditional installation method is: first lift the first section of the boom with the lifting equipment, and install it on the main jib, and then lift the first The first integral joint is installed at the end of the first boom, then the second boom is lifted to connect with the first integral joint, and the next integral joint is hoisted and installed at the end of the second boom. By analogy, the installation of the Nth jib can be completed directly. This installation method of lengthening each section on the main jib has complicated hoisting procedures and low installation efficiency. At the same time, the total time of hoisting is very long, which greatly increases the installation process Potential safety hazard; in addition, due to the relatively large volume of the boom itself, it is inevitable that there will be dimensional errors between each section of the boom and the overall connecting section during the production and processing of the boom. The center of the jib section on one side of the boom is skewed relative to the center of the other jib section, especially if there is an error in the connection between the first section jib and the second section jib, then the situation of skimming or tilting to one side will be more serious Seriously, this situation will lead to poor overall stability of the jib, and in severe cases will lead to poor production quality; therefore, there is an urgent need for a new tower crane double-boom connection form to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide a parallel connection form and installation method of double jib frames of a tower crane, which are used to solve the problems of difficult processing and transportation, complicated installation procedures, high potential safety hazards and the jib frames tilting to one side after installation.

In order to achieve the purpose of the above invention, the technical solution adopted by the present invention is specifically: a parallel connection form of double jib frames of tower cranes, including a left jib section and a right jib section, the structures of the left jib section and the right jib section are composed of the upper The upper structure is composed of two upper chords and horizontal webs. The oblique webs are square structures spliced by pipes or angle steel. The lower chord box is composed of steel plates welded to form a box structure. They finally form an arm section structure with an inverted triangular section. The upper end of one side of the left arm section is equidistantly provided with a plurality of upper connecting lugs one, and the upper end of one side of the right arm section is equidistantly arranged with multiple Two upper connecting ear seats, the upper connecting ear seat one and the upper connecting ear seat two are arranged oppositely, and are connected by pin one, and a plurality of lower connecting ear plates are equidistantly arranged on one side of the lower end of the left arm section 1. A plurality of lower connecting ear plates 2 are equidistantly arranged on one side of the lower end of the right arm section, and the lower connecting ear plates 1 and 2 are connected by a lower connecting rod.

Further, the plurality of upper connecting lugs 1 and the plurality of lower connecting lugs 1 are distributed along the length direction of the left arm section, and the plurality of upper connecting lugs 2 and the plurality of lower connecting lugs 2 are arranged along the The length direction of the right jib section is distributed, so that the left jib and the right jib can be evenly and tightly connected together, increasing the stability of the jib.

Further, the lower connecting rod includes a lower connecting rod 1 and a lower connecting rod 2, the lower connecting rod 1 is vertically arranged with the left arm section or the right arm section, and the lower connecting rod 2 is respectively the left arm section, The included angle between the right jib sections is less than 10°, and the connection form and connection angle of the lower connecting rod are not limited, as long as it can strengthen the connection strength and connection stability of the left and right jib sections.

Further, the lower connecting rod is connected with the lower connecting ear 1 or the lower connecting ear 2 through the pin shaft 2, and the assembled connection is more convenient to install, which is beneficial to improve the installation efficiency.

Further, the lower connecting rod adopts a round rod, a rectangular rod or a square rod, and the shape of the lower connecting rod is not limited.

Further, the upper connecting ear seat 1 and the lower connecting ear plate 1 are both non-detachably connected to the left arm section, and the upper connecting ear seat 2 and the lower connecting ear plate 2 are both fixedly connected to the right arm section.

Further, reinforcement plates are welded on the upper connection ear seat 1, the upper connection ear seat 2, the lower connection ear plate 1 and the lower connection ear plate 2, and the setting of the reinforcement plate is beneficial to improve the connection strength.

In order to better achieve the above-mentioned purpose of the invention, the present invention also provides a method for installing the connection form of the double boom frame of the tower crane in parallel, which specifically includes the following steps:

S1: Place the left arm section and the right arm section side by side on the ground according to the installation distance, then align the pin holes between the upper connecting ear seat 1 and the upper connecting ear seat 2, and connect the upper connecting ear Seat 1 is connected to the upper connecting lug seat 2. After installation, the reliable parallel connection of the upper part of the left boom section and the right boom section can be realized;

S2: Connect the lower connecting rod 1 and the lower connecting rod 2 with the connecting lug plates on the lower part of the left and right boom sections in sequence respectively through the pin shaft 2. After the lower connecting rod 1 and the lower connecting rod 2 are installed That is to realize the reliable parallel connection of the lower part of the left arm section and the right arm section, so far, the left arm section and the right arm section are assembled on the ground;

S3. Use lifting equipment to lift the assembled left and right jib sections to the same height as the main boom section, and align the left and right jib section pin connection holes with the installed jib section pin holes on the main jib section , and then install the connecting pin of the boom section, so far the installation of the left boom section and the right boom section on the main boom frame is completed;

S4: Evacuate the lifting equipment, and the installation is completed.

Compared with prior art, the beneficial effect of the present invention is:

1. The use of the original integral joint will increase with the increase in the volume of the boom, which will lead to difficulties in processing and transportation. The present invention sets the upper connecting ear seat 1, the upper connecting ear seat 2, and the lower connecting ear plate 1. The lower connecting ear plate 2 and the lower connecting rod, since these parts are directly welded, it has nothing to do with the size of the arm frame, so there will be difficulties in processing. In addition, the shape of the lower connecting rod is regular and the volume is smaller , easy to process and more convenient to transport.

2. The upper connecting ear seat 1, the upper connecting ear seat 2, the lower connecting ear plate 1 and the lower connecting ear plate 2 are evenly and equidistantly arranged along the length direction of the boom frame, so that the connection between the left arm section and the right arm section is more convenient. Tight and stable.

3. Since there is no need for integral connection joints, after adopting the connection method of the present invention, the setting of the specific length of the boom is better controlled, and the length of the boom is more accurate according to needs, which is beneficial to saving costs and improving product quality.

4. After adopting the connection method of the present invention, since the left and right arm sections are no longer hoisted section by section, they are then connected and lengthened through the integral connection section, but after the overall installation on the ground is completed, they are directly hoisted integrally with the theme arm The frame connection makes the operation process simple and the installation is convenient, which is beneficial to reduce the installation time and improve the installation efficiency. Since the hoisting time is reduced, the safety hazard of assembly is also greatly reduced.

5. With the connection method of the present invention, after the connection is completed, the boom will not be tilted or tilted to one side due to processing errors, which is conducive to improving product quality.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

Fig. 1 is a schematic front view of the present invention.

Figure 2 is a schematic side view of the invention.

Fig. 3 is a view from direction A of the present invention.

Fig. 4 is a B-direction view of the present invention.

Fig. 5 is a schematic diagram of parallel connection and partial enlargement of booms of the present invention.

Fig. 6 is a plane side view of the double-arm parallel connection in the prior art of the present invention.

Fig. 7 is a three-dimensional schematic diagram of parallel connection of two arms in the prior art of the present invention.

Wherein, the reference signs are: 1. Overall connecting section 1; 2. Right arm section; 3. Left arm section; 4. Upper connecting ear seat 1; 5. Upper connecting ear seat 2; 6. Lower connecting rod 1 ;7. The second connecting rod at the lower part; 8. The first connecting ear plate at the lower part; 9. The second connecting ear plate at the lower part; 10. The upper piece structure; .

Detailed implementation

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

With reference to accompanying drawing 1 to accompanying drawing 7,

This embodiment provides a parallel connection form of tower crane double jib frames, including left jib section 3 and right jib section 2, the length of left jib section 3 and right jib section 2 is the same, and the right jib section of left jib section 3 The upper end of the side is equidistantly provided with a plurality of upper connecting lugs-4, and the plurality of upper connecting lugs-4 are distributed along the length direction of the left arm section, and the left upper end of the right arm section 2 is equidistantly provided with a plurality of upper connecting lugs. Ear seat two 5, a plurality of lower connecting ear plates one 8 are also arranged along the length direction of the left arm section 3, the upper connecting ear seat one 4 corresponds to the upper connecting ear seat two 5, and is connected by pin one, the left side The right lower end of the arm section 3 is equidistantly provided with a plurality of lower connecting ear plates 1 8, and the left lower end of the right arm section 2 is equidistantly provided with a plurality of lower connecting ear plates 2 8, and the lower connecting ear plate 1 8 is connected to the lower The connecting lugs 2 9 are connected by the lower connecting rods, and a plurality of upper connecting lugs 2 5 and a plurality of lower connecting lugs 2 9 are also distributed along the length direction of the right arm section 2 .

The lower connecting rod comprises a lower connecting rod one 6 and a lower connecting rod two 7, the lower connecting rod one 6 is perpendicular to the left arm section 3 or the right arm section 2, and the lower connecting rod two is connected to the left arm section 3 or the right arm section 7. The included angle between the sections 2 is less than 90 degrees. This arrangement makes a triangular structure formed between the lower connecting rod 1 6, the lower connecting rod 2 7 and the left arm section 3 or the right arm section 2, which strengthens the connection form. stability.

The lower connecting rod is connected with the lower connecting ear plate one 8 or the lower connecting ear plate two 9 through the pin shaft two, and other reliable forms can also be used to connect; the lower connecting rod can be a round rod, a rectangular rod or a square rod, but not Limited to these several shapes, every rod, plate, cylinder or post that can play the same role is all within the scope of the present invention; the upper connection ear seat-4 and the lower connection ear plate-8 are all connected to each other by welding or other reliable means. The left arm section 3 is fixedly connected, the upper connecting ear seat 2 5 and the lower connecting ear plate 2 9 are fixedly connected to the right arm section 2 by welding or other reliable means; the upper connecting ear seat 1 4 and the upper connecting ear seat 2 5 1. Both the lower connecting lug plate 1 6 and the lower connecting lug plate 2 7 are welded with reinforcing plates, which is conducive to enhancing the connection rigidity.

When the jib section needs to increase with the increase of lifting performance, it will not be necessary to connect the upper connecting lug 4, the upper connecting lug 2 5, the lower connecting lug 1 8, the lower connecting lug 2 9 and the lower The volume of the connecting rod has a great influence, and it only needs to increase the strength of the corresponding structure, and the processing is simple, and the transportation is more convenient. At the same time, because the left arm section 3 and the right arm section 2 are more evenly connected, the force point is wider , so that the connection method is more stable and firm; when installing the jib structure, the left jib section 3 and the right jib section 2 are lifted directly, and the workers can directly fix the left jib section 3 and the right jib section 2 The overall installation does not need to be hoisted and connected one by one in the installation sequence, which is conducive to improving the installation efficiency. After the efficiency is improved, because the jib hangs in the air for a shorter time, it is beneficial to reduce the safety in the workshop. Hidden dangers; and this connection method can effectively prevent the traditional boom from tilting or tilting to one side after the boom is connected, which is conducive to improving production quality and enhancing the stability of the boom.

In order to better achieve the purpose of the above invention, this embodiment also provides an installation method in the form of parallel connection of the double jib frame of the tower crane, which specifically includes the following steps:

S1: Place the left arm section and the right arm section side by side on the ground according to the installation distance, then align the pin holes between the upper connecting ear seat 1 and the upper connecting ear seat 2, and connect the upper connecting ear Seat 1 is connected to the upper connecting lug seat 2. After installation, the reliable parallel connection of the upper part of the left boom section and the right boom section can be realized;

S2: Connect the lower connecting rod 1 and the lower connecting rod 2 with the connecting lug plates on the lower part of the left and right boom sections in sequence respectively through the pin shaft 2. After the lower connecting rod 1 and the lower connecting rod 2 are installed That is to realize the reliable parallel connection of the lower part of the left arm section and the right arm section, so far, the left arm section and the right arm section are assembled on the ground;

S3. Use lifting equipment to lift the assembled left and right jib sections to the same height as the main boom section, and align the left and right jib section pin connection holes with the installed jib section pin holes on the main jib section , and then install the connecting pin of the boom section, so far the installation of the left boom section and the right boom section on the main boom frame is completed;

S4: Evacuate the lifting equipment, and the installation is completed.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (8)

1. A parallel connection form of double jib frames of a tower crane, comprising a left jib section (3) and a right jib section (2), the left jib section (3) and the right jib section (2) are constructed by The upper structure (10) consists of two upper chords (13) and the horizontal web (14), and the diagonal rod (11) It is a square structure spliced by pipes or angle steel. The lower chord box (12) is assembled and welded by steel plates to form a box structure. They finally form a jib section structure with an inverted triangular section. It is characterized in that the left jib section (3) One upper end of one side is equidistantly provided with a plurality of upper connecting ear seats one (4), and one upper end of one side of the right arm section (2) is equidistantly provided with a plurality of upper connecting ear seats two (5). Connecting ear seat 1 (4) is arranged opposite to the upper connecting ear seat 2 (5), and is connected by pin shaft 1. A plurality of lower connecting ear plates 1 are equidistantly arranged on the side of the lower end of the left arm section (3) (8), the lower end side of the right arm section (2) is equidistantly provided with a plurality of lower connecting ear plates (9), the lower connecting ear plate one (8) and the lower connecting ear plate two (9) ) are connected by the lower connecting rod. 2. The parallel connection form of a double jib frame of a tower crane according to claim 1, characterized in that, a plurality of said upper connection lugs one (4) and a plurality of lower connection lugs one (8) are all along the The left arm section (3) is distributed in the length direction, and the plurality of upper connecting lug seats two (5) and the plurality of lower connecting lug plates two (9) are distributed along the right arm section (2) in the length direction. 3. The connection form of parallel connection of double jib frames of a tower crane according to claim 2, characterized in that, the lower connecting rod comprises a lower connecting rod one (6) and a lower connecting rod two (7), and the lower connecting rod The first connecting rod (6) is vertically arranged with the left boom section (3) or the right boom section (2), and the lower connecting rod two (7) are respectively the left boom section (3) and the right boom section (2) The angle between them is less than 90 degrees. 4. The parallel connection form of a tower crane double jib frame according to claim 3, characterized in that, the connection between the lower connecting rod and the first lower connecting ear (8) or the second lower connecting ear (9) is through a pin Axis two connection. 5. A parallel connection form of tower crane double jib frames according to claim 4, characterized in that, the lower connecting rod is a round rod, a rectangular rod or a square rod. 6. The parallel connection form of a double boom frame of a tower crane according to any one of claims 1-5, characterized in that, the upper connecting lug seat one (4) and the lower connecting lug plate one (8) are both It is connected with the left arm section (3) in a non-detachable manner, and the upper connecting lug seat two (5) and the lower connecting ear plate two (9) are both fixedly connected with the right arm section (2). 7. The connection form of parallel connection of double jib frames of a tower crane according to claim 6, characterized in that, the upper connecting ear seat one (4), the upper connecting ear seat two (5), the lower connecting ear plate one (8) and the bottom connecting ear plate two (9) are all welded with reinforcement plates. 8. An installation method of a parallel connection form of a tower crane double jib frame, characterized in that, comprising the following steps: S1: Place the left boom section (3) and right boom section (2) side by side on the ground according to the installation distance, and then place the pin between the upper connecting lug one (4) and the upper connecting lug two (5) Align the shaft holes, and connect the upper connecting ear seat one (4) with the upper connecting ear seat two (5) through the pin shaft one. After installation, the upper part of the left arm section (3) and the right arm section (2) Reliable parallel connection; S2: Connect the lower connecting rod 1 (6) and the lower connecting rod 2 (7) to the connecting lugs on the lower parts of the left arm section (3) and the right arm section (2) in sequence respectively through the pin shaft 2, After the first lower connecting rod (6) and the second lower connecting rod (7) are installed, the reliable parallel connection of the lower parts of the left boom section (3) and the right boom section (2) will be realized. So far, the left boom section (3) and the The right jib section (2) is assembled on the ground; S3. Use lifting equipment to lift the assembled left and right boom sections to the same height as the main boom section, and connect the pin shaft connection holes of the left boom section (3) and right boom section (2) to the main boom section Align the installed boom section pin holes, and then install the boom section connection pin, so far the left boom section (3) and right boom section (2) are installed on the main boom; S4: Evacuate the lifting equipment, and the installation is completed.