Method for installing super-long crane beam

Abstract

The invention provides a super-long crane beam mounting method which comprises the following steps: segmenting a super-long crane beam to be constructed, and transversely placing each crane beam segment on a corresponding jig frame; the adjacent crane beam sections are welded, so that the whole crane beam which is transversely placed is formed; the lifting lugs are arranged on the front side and the back side of an upper flange plate of the whole crane beam correspondingly; the upper side of the whole crane beam is lifted to a preset inclination angle through a lifting lug on the front side of the upper flange plate; and the upper side of the whole crane beam is lifted through the lifting lugs on the front side and the back side of the upper flange plate at the same time till the whole crane beam is perpendicular to the ground. The overlength crane beam installation method can effectively solve the problem that an existing overlength crane beam installation method is difficult to turn over.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more particularly to a method for installing an extra-long crane beam. Background Art

[0002] In the construction of metallurgical industrial plants, extra-long crane beams are the core components supporting heavy cranes. They are usually over 50 meters long, more than 5 meters high, and weigh over 100 tons. Due to their large size and heavy weight, extra-long crane beams cannot be transported as a whole. They must be processed in sections at the processing plant and then transported to the construction site for on-site assembly. This leads to many technical difficulties during the installation process. For example, the traditional segmented welding process of extra-long crane beams results in concentrated welds in the mid-span area (usually the middle third of the extra-long crane beam), high stress, and a low safety factor. In addition, the assembled extra-long crane beams are long and heavy, making them difficult to turn over and lift. Traditional multi-point lifting can easily cause structural distortion, weld cracking, and low lifting efficiency.

[0003] Based on this, there is an urgent need for an efficient and accurate method for lifting super-long crane beams to solve the problem of difficulty in turning over super-long crane beams. Summary of the Invention

[0004] In view of the above problems, an object of the present invention is to provide a method for installing an extra-long crane beam to solve the problem of difficulty in turning over in the existing method for installing an extra-long crane beam.

[0005] The present invention provides a method for installing an extra-long crane beam, the method comprising:

[0006] Divide the extra-long crane beam to be constructed into sections, and place each crane beam section horizontally on the corresponding tire frame;

[0007] Welding adjacent crane beam sections to form a transversely placed crane beam assembly;

[0008] Arrange the lifting ears on the front and back sides of the upper flange plate of the crane beam respectively;

[0009] Lifting the upper side of the crane beam as a whole to a preset inclination angle through the lifting lugs on the positive side of the upper flange plate;

[0010] The upper side of the entire crane beam is lifted simultaneously by the lifting ears on the front and back sides of the upper flange plate until the entire crane beam is perpendicular to the ground.

[0011] In addition, a preferred solution is that, in the process of segmenting the overlong crane beam to be constructed, the length of each crane beam segment does not exceed a preset length threshold; and

[0012] The splicing points of adjacent crane beam segments avoid the first preset span range of the upper flange plate, the second preset span range of the lower flange plate and the third span range of the web plate.

[0013] In addition, a preferred solution is that, during the welding of adjacent crane beam segments, adjacent welds are staggered by a preset offset distance.

[0014] In addition, a preferred solution is that, in the process of arranging the lifting lugs on the front and back sides of the upper flange plate of the crane beam as a whole, at least two sets of lifting lugs are arranged on both the front and back sides of the upper flange plate; and,

[0015] The lifting ears are symmetrically distributed on both sides of the upper flange plate.

[0016] In addition, a preferred solution is that after the upper side of the crane beam as a whole is lifted to a preset inclination angle by the lifting lugs on the positive side of the upper flange plate, the method further comprises:

[0017] Sleepers are supported between the upper side of the crane beam as a whole and the corresponding tire frame.

[0018] In addition, a preferred solution is that, in the process of simultaneously lifting the upper side of the entire crane beam through the lifting ears on the front and back sides of the upper flange plate,

[0019] Two mutually symmetrical lifting ears located on the front and back sides of the upper flange plate are connected to the same lifting device.

[0020] In addition, a preferred solution is that, while simultaneously lifting the upper side of the crane beam as a whole through the lifting ears on both the front and back sides of the upper flange plate until the crane beam as a whole is vertical to the ground,

[0021] When the upper side of the crane beam as a whole is lifted to a first preset height, the crane beam as a whole is stopped for a first preset time and an abnormality inspection is performed on the crane beam as a whole; if there is no abnormality, the crane beam as a whole is continued to be lifted until the crane beam as a whole is vertical to the ground.

[0022] In addition, a preferred solution is that after the crane beam is vertical to the ground as a whole, the further solution includes:

[0023] The crane beam is lifted as a whole to a preset installation position through the lifting ears on the front and back sides of the upper flange plate.

[0024] In addition, a preferred solution is that the lifting of the entire crane beam to a preset installation position by means of the lifting ears on the front and rear sides of the upper flange plate includes: performing a lifting safety inspection on the entire crane beam;

[0025] The process of the hoisting safety inspection includes:

[0026] First, after the crane beam is lifted to a second preset height, the crane beam is stopped for a second preset time to observe whether there is any abnormality in the crane beam;

[0027] Then, after lowering the entire crane beam to a third preset height, the entire crane beam is stopped for a third preset time to observe whether there is any abnormality in the entire crane beam.

[0028] In addition, a preferred solution is that the lifting of the crane beam as a whole to a preset installation position by means of the lifting ears on the front and back sides of the upper flange plate further comprises:

[0029] After the crane beam has been hoisted and inspected for safety,

[0030] First, the crane beam is lifted as a whole to a preset designated elevation, and then the position of the crane beam is adjusted as a whole until the crane beam as a whole reaches a preset installation position.

[0031] Compared with the prior art, the method for installing an extra-long crane beam provided by the present invention arranges lifting lugs on both the front and back sides of the upper flange plate of the crane beam as a whole. During the hoisting process, one side of the crane beam as a whole (the upper flange plate side) is first lifted by the lifting lugs on the front side of the upper flange plate, and then sleepers are added below this side of the crane beam as a whole. Then, by adding lifting points, the upper side of the crane beam as a whole is lifted simultaneously by the lifting lugs on both the front and back sides of the upper flange plate, thereby completing the hoisting process of the crane beam as a whole. This method can solve the technical problem of the difficulty in turning over an extra-long crane beam. Moreover, this hoisting process is not only safe and reliable, but also can improve construction efficiency and ensure construction quality.

[0032] To achieve the above and related ends, one or more aspects of the present invention include features that will be described in detail below and particularly pointed out in the claims. The following description and the accompanying drawings set forth certain exemplary aspects of the present invention in detail. However, these aspects are merely indicative of the various ways in which the principles of the present invention may be employed. Furthermore, the present invention is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] By referring to the following description and claims in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and readily understood. In the accompanying drawings:

[0034] Figure 1 A schematic diagram of the welding and production of an extra-long crane beam to be constructed according to an embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of a lifting lug provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the overall lifting adjustment of the crane beam provided by an embodiment of the present invention;

[0037] Figure 4 A flow chart of a method for installing an extra-long crane beam provided in an embodiment of the present invention;

[0038] In the attached drawings: a crane beam as a whole 1, a tire frame 2, a hole 3, a gasket 4, a lifting lug 5, an arc-shaped transition plate 6, a rectangular steel plate 7, and a sleeper 8.

[0039] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0040] In the following description, for illustrative purposes, numerous specific details are set forth to provide a comprehensive understanding of one or more embodiments. However, it will be apparent that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form to facilitate description of one or more embodiments.

[0041] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0042] The specific structure and function of the super-long crane beam installation method provided by the present invention are described in detail below with reference to the accompanying drawings. Figure 1 The figure shows the welding production diagram of the super-long crane beam to be constructed according to the embodiment of the present invention. Figure 2 The structure of the lifting lug provided by the embodiment of the present invention is shown. Figure 3 The figure shows the lifting adjustment diagram of the entire crane beam provided by the embodiment of the present invention. Figure 4 The flowchart of the method for installing an extra-long crane beam provided by an embodiment of the present invention is shown.

[0043] Combine Figures 1 to 4 It can be seen that the present invention provides a method for installing an extra-long crane beam, the installation method comprising:

[0044] The extra-long crane beam to be constructed is divided into sections, and each crane beam section is placed horizontally on the corresponding tire frame 2; wherein, each crane beam section is placed on two tire frames 2, and the butt joint between two adjacent crane beam sections is placed in the middle of the tire frame 2 to facilitate subsequent welding;

[0045] Welding adjacent crane beam segments to form a transversely placed crane beam assembly 1;

[0046] The lifting lugs 5 are respectively arranged on the front and back sides of the upper flange plate of the crane beam assembly 1;

[0047] Lift the upper side of the crane beam 1 to a preset tilt angle using the lifting lugs 5 on the positive side of the upper flange plate;

[0048] The upper side of the crane beam 1 is lifted simultaneously by the lifting ears 5 on the front and back sides of the upper flange plate until the crane beam 1 is perpendicular to the ground.

[0049] It should be noted that, in the process of segmenting the super-long crane beam to be constructed, in order to ensure the stability of each crane beam segment, the length of each crane beam segment shall not exceed the preset length threshold (for example, 20m); and the splicing points of adjacent crane beam segments shall avoid the first preset span range of the mid-span of the upper flange plate, the second preset span range of the mid-span of the lower flange plate, and the third span range of the mid-span of the web plate; specifically, the super-long crane beam to be constructed can be divided into three sections, each section not exceeding 20m, and the splicing of the upper flange plate of the super-long crane beam to be constructed needs to avoid the 1 / 4 span range of the mid-span, the splicing of the lower flange plate needs to avoid the 1 / 3 span range of the mid-span, and the splicing of the web plate needs to avoid the 1 / 5 span range of the mid-span, so as to improve the stability of each crane beam segment.

[0050] In addition, during the welding of adjacent crane beam sections, in order to ensure firm welding, the crane beam butt welds are staggered, and adjacent welds need to be staggered by a preset staggered distance; for example, adjacent welds can be staggered by 200mm, and the main stiffening ribs and the splicing seams must be staggered by more than 200mm.

[0051] Specifically, to ensure the stability of the crane beam assembly 1 during the installation of the lifting lugs 5 on both sides of the upper flange of the crane beam assembly 1, multiple sets (at least two sets) of lifting lugs 5 are arranged on both sides of the upper flange; the lifting lugs 5 are symmetrically distributed on both sides of the upper flange. For example, four sets of lifting lugs 5 are symmetrically arranged on both sides of the upper flange of the crane beam assembly 1; and for each side of the crane beam assembly 1, two lifting lugs 5 form a set, with each set of lifting lugs 5 spaced 2 meters apart. The two sets of lifting lugs 5 are each 9.5 meters from each end of the crane beam, and the distance between the two sets of lifting lugs 5 is 34 meters.

[0052] More specifically, for each lifting lug 5, in order to achieve a stable connection between it and the upper flange plate, as shown in FIG. Figure 2As shown, the lifting lug 5 may include a rectangular steel plate 7 welded to the upper flange plate, an arc-shaped transition plate 6 fixed to the middle of the rectangular steel plate 7, and a hole 3 provided on the arc-shaped transition plate; wherein the hole is used to connect with the hook of the lifting equipment; and, in order to prevent the hook of the lifting equipment from damaging the edge of the hole, a gasket 4 may be provided in the hole to relieve the squeezing of the hook of the lifting equipment on the edge of the hole. In addition, with respect to the specifications of the lifting lug 5, the specifications of the lifting lug 5 are preferably set to PL30*230*652mm, the radius of the arc-shaped transition zone (on the arc-shaped transition plate) is preferably 80mm, and the radius of the hole is preferably 40mm; a gasket is added in the hole with a thickness of 20mm; the lifting lug 5 is connected by strong welding such as groove penetration, and the weld height shall not be less than 6mm. After welding is completed, ultrasonic flaw detection is performed according to the first-level weld to ensure that the welding quality meets the requirements and the safety and reliability of the lifting lug 5 are guaranteed.

[0053] In addition, in order to further improve the turning stability of the crane beam as a whole 1, after the upper side of the crane beam as a whole 1 is lifted to a preset inclination angle through the lifting lug 5 on the positive side of the upper flange plate, it can also include: supporting sleepers 8 between the upper side of the crane beam as a whole 1 and the corresponding tire frame 2, and using the sleepers 8 to relieve the pulling force of the crane beam as a whole 1 on the lifting equipment; after the sleepers 8 are supported, add the lifting lug 5 on the reverse side of the upper flange plate as a lifting point, and lift the upper side of the crane beam as a whole 1 at the same time through the lifting lugs 5 on the positive and reverse sides of the upper flange plate until the crane beam as a whole 1 is vertical to the ground.

[0054] It should be noted that, in order to improve the hoisting stability of the crane beam assembly 1, when the upper side of the crane beam assembly 1 is lifted simultaneously by the lifting lugs 5 on the front and back sides of the upper flange plate, the two mutually symmetrical lifting lugs 5 on the front and back sides of the upper flange plate are connected to the same lifting equipment. Furthermore, in order to ensure the hoisting safety of the crane beam assembly 1 during the turning process, when the upper side of the crane beam assembly 1 is lifted simultaneously by the lifting lugs 5 on the front and back sides of the upper flange plate until the crane beam assembly 1 is perpendicular to the ground, when the upper side of the crane beam assembly 1 reaches a first preset height, the process is stopped for a first preset time and the crane beam assembly is checked for abnormalities; if there is no abnormality, the crane beam assembly 1 is continued to be lifted until the crane beam assembly 1 is perpendicular to the ground.

[0055] During actual operation, Φ32mm high-strength steel wire ropes can be connected to the two sets of lifting eyes 5 welded on the positive side of the upper flange plate of the crane beam as a whole 1. Each set of lifting eyes 5 is pulled by a 150t crawler crane (lifting equipment). The steel wire rope is pulled to simultaneously lift one side of the upper flange plate of the crane beam as a whole 1 to an inclination angle of 15° with the horizontal plane. Then, sleepers 8 with a height of 200mm are placed between the upper side of the crane beam as a whole 1 and the corresponding tire frame 2 to increase the height of the upper flange plate and facilitate the subsequent turning over of the crane beam as a whole 1. After raising one side of the upper flange plate of the crane beam as a whole 1, a lifting point is added. On the basis of keeping the original two sets of lifting eyes 5 connected, the two sets of lifting eyes 5 corresponding to the back of the crane beam are connected. The two sets of lifting eyes 5 corresponding to the front and back positions of the crane beam are pulled by a 150t crawler crane to improve the lifting stability. Then, a steel wire rope is fixed to the aforementioned lifting point and pulled to simultaneously apply force to the four sets of lifting lugs 5 on one side of the upper flange of the crane beam assembly 1 until the crane beam is completely perpendicular to the ground, completing the overturning. Furthermore, to ensure the safety of the crane beam assembly 1 during the overturning process, the crane beam assembly 1 is first lifted 100-200mm, then the lifting is stopped. After observing for 2 minutes and confirming that there are no abnormalities, the double crane lifting operation can be continued.

[0056] It should be noted that, in order to complete the entire hoisting process of the crane beam 1, after the crane beam 1 is vertical to the ground, it also includes: lifting the crane beam 1 to a preset installation position through the lifting ears 5 on the front and back sides of the upper flange plate. In addition, in order to ensure the safety of the lifting process of the crane beam as a whole 1 off the ground, the crane beam as a whole 1 is lifted to the preset installation position by the lifting ears 5 on the positive and negative sides of the upper flange plate, which includes: performing a lifting safety inspection on the crane beam as a whole 1; the lifting safety inspection process includes: first lifting the crane beam as a whole 1 to a second preset height, stopping for a second preset time, and observing whether the crane beam as a whole 1 has any abnormalities; then lowering the crane beam as a whole 1 to a third preset height, stopping for a third preset time, and observing whether the crane beam as a whole 1 has any abnormalities. Further, in order to lift the crane beam as a whole 1 into place, the crane beam as a whole 1 is lifted to the preset installation position by the lifting ears 5 on the positive and negative sides of the upper flange plate, which also includes: after the crane beam as a whole 1 passes the lifting safety inspection, first lift the crane beam as a whole 1 to the preset specified elevation, and then adjust the position of the crane beam as a whole 1 until the crane beam as a whole 1 reaches the preset installation position.

[0057] During the actual lifting process, the lifting height of the crane beam can be set to 10.83m, and the wire rope angle θ during lifting is 60°. First, stop the crane beam 300mm above the ground and keep it still, then drop it 200mm and stop, and repeat twice; after confirming safety, adjust the horizontal position of the crane beam as a whole 1 to roughly align with the installation position, and the crane should move slowly and synchronously to prevent shaking; after lifting the crane beam as a whole 1 to the specified elevation, move the crawler crane to roughly adjust the crane beam to the installation position, and slowly drop the hook when in place, strive to align the center line once, and try to ensure that the two cranes run synchronously; when approaching the shoulder beam, use a crowbar and jack to adjust its axis size, and the two crawler cranes cooperate to make fine adjustments to make the crane beam as a whole 1 reach the precise installation position.

[0058] The above description of the method for installing an extra-long crane beam according to the present invention is provided by way of example with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications may be made to the method for installing an extra-long crane beam according to the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for installing an extra-long crane beam; characterized in that: The installation method includes: Divide the extra-long crane beam to be constructed into sections, and place each crane beam section horizontally on the corresponding tire frame; Welding adjacent crane beam sections to form a transversely placed crane beam assembly; Arrange the lifting ears on the front and back sides of the upper flange plate of the crane beam respectively; Lifting the upper side of the crane beam as a whole to a preset inclination angle through the lifting lugs on the positive side of the upper flange plate; The upper side of the entire crane beam is lifted simultaneously by the lifting ears on the front and back sides of the upper flange plate until the entire crane beam is perpendicular to the ground.

2. The method for installing an extra-long crane beam according to claim 1, wherein: In the process of segmenting the overlong crane beam under construction, the length of each crane beam segment does not exceed the preset length threshold; and The splicing points of adjacent crane beam segments avoid the first preset span range of the upper flange plate, the second preset span range of the lower flange plate and the third span range of the web plate.

3. The method for installing an extra-long crane beam according to claim 2, wherein: During the welding of adjacent crane beam sections, adjacent welds are staggered by a preset offset distance.

4. The method for installing an extra-long crane beam according to claim 3, wherein: In the process of arranging the lifting lugs on the front and back sides of the upper flange plate of the crane beam assembly, at least two sets of lifting lugs are arranged on both the front and back sides of the upper flange plate; and The lifting ears are symmetrically distributed on both sides of the upper flange plate.

5. The method for installing an extra-long crane beam according to claim 4, wherein: After the upper side of the crane beam as a whole is lifted to a preset inclination angle by the lifting lugs on the positive side of the upper flange plate, the method further comprises: Sleepers are supported between the upper side of the crane beam as a whole and the corresponding tire frame.

6. The method for installing an extra-long crane beam according to claim 5, wherein: In the process of simultaneously lifting the upper side of the crane beam as a whole through the lifting ears on the front and back sides of the upper flange plate, Two mutually symmetrical lifting ears located on the front and back sides of the upper flange plate are connected to the same lifting device.

7. The method for installing an extra-long crane beam according to claim 6, wherein: When the upper side of the crane beam is lifted simultaneously by the lifting ears on the front and back sides of the upper flange plate until the crane beam is vertical to the ground, When the upper side of the crane beam as a whole is lifted to a first preset height, the crane beam is stopped for a first preset time and an abnormality inspection is performed on the crane beam as a whole; If there is no abnormality, continue to lift the entire crane beam until the entire crane beam is vertical to the ground.

8. The method for installing an extra-long crane beam according to claim 7, wherein: After the crane beam is vertical to the ground as a whole, the method further comprises: The crane beam is lifted as a whole to a preset installation position through the lifting ears on the front and back sides of the upper flange plate.

9. The method for installing an extra-long crane beam according to claim 8, wherein: The lifting of the crane beam as a whole to a preset installation position by means of the lifting ears on the front and rear sides of the upper flange plate comprises: performing a lifting safety inspection on the crane beam as a whole; The process of the hoisting safety inspection includes: First, after the crane beam is lifted to a second preset height, the crane beam is stopped for a second preset time to observe whether there is any abnormality in the crane beam; Then, after lowering the entire crane beam to a third preset height, the entire crane beam is stopped for a third preset time to observe whether there is any abnormality in the entire crane beam.

10. The method for installing an extra-long crane beam according to claim 9, wherein: The method of lifting the crane beam as a whole to a preset installation position by means of the lifting ears on the front and back sides of the upper flange plate further comprises: After the crane beam has been hoisted and inspected for safety, First, the crane beam is lifted as a whole to a preset designated elevation, and then the position of the crane beam is adjusted as a whole until the crane beam as a whole reaches a preset installation position.

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