Method for installing cross beam and barrel of portal crane

Abstract

The invention relates to the technical field of portal crane installation, in particular to a portal crane cross beam and barrel installation method which comprises the steps that S1, a cross beam and a barrel are arranged on a site station, the barrel is hoisted to the position above the cross beam through hoisting equipment, and the bottom of the barrel corresponds to a cylinder structure on the cross beam; s2, the barrel is placed on the cylinder structure through hoisting equipment, the position of the barrel is adjusted, the barrel and the cylinder structure are aligned up and down, and the center line of the barrel and the center line of the cylinder structure coincide; s3, the barrel is jacked through a jacking device arranged on the outer side of the cylinder structure and the outer side of the barrel, and the perpendicularity of the barrel is adjusted; and S4, the bottom of the cylinder body and the top of the cylinder structure are welded and fixed to form the assembly. And S5, the welded and fixed assembly is integrally hoisted to an end beam of a cart walking mechanism through a floating crane to be assembled. The mounting difficulty of the cross beam and the barrel of the gantry crane can be reduced, and the operation risk and the use cost of the floating crane are reduced.

Description

Technical Field

[0001] This application relates to the technical field of portal machine installation, and specifically relates to a method for installing a cross beam and a cylinder body of a portal machine. Background Art

[0002] A portal machine is short for a portal crane. Large rotary portal machines are usually used in scenarios such as docks and ports. Due to the large weight of the rotary portal machine, large floating cranes are usually used for installation operations. The rotary portal machine includes components such as a trolley traveling mechanism, a gantry end beam, a cross beam, a cylinder body, an upper slewing assembly, and a boom. Since the connection between the cross beam and the cylinder body is butt welding, if the cross beam is installed first and then the cylinder body, the floating crane needs to lift and weld the cross beam and the cylinder body in sequence, and then the floating crane releases the hook after welding. The overall hoisting operation time is relatively long. At the same time, the floating crane is affected by factors such as wind and surges, and its stability is poor, resulting in great difficulties in positioning adjustment and installation. Summary of the Invention

[0003] The purpose of this application is to propose a method for installing a cross beam and a cylinder body of a portal machine to solve the problems of high installation difficulty between the cross beam and the cylinder body and long floating crane operation time in the existing portal machine installation technology.

[0004] To solve at least one of the above technical problems, the technical solution of this application is as follows:

[0005] A method for installing a cross beam and a cylinder body of a portal machine according to an embodiment of the present invention includes:

[0006] Step S1: Arrange the cross beam and the cylinder body on the on-site work station, and use a hoisting device to lift the cylinder body above the cross beam so that the bottom of the cylinder body corresponds to the cylindrical structure on the cross beam;

[0007] Step S2: Place the cylinder body on the cylindrical structure through the hoisting device, and adjust the position of the cylinder body so that the cylinder body and the cylindrical structure are vertically aligned, and the center line of the cylinder body coincides with the center line of the cylindrical structure;

[0008] Step S3: Lift the cylinder body through a jacking device arranged outside the cylindrical structure and the cylinder body to adjust the verticality of the cylinder body;

[0009] Step S4: Weld and fix the bottom of the cylinder body and the top of the cylindrical structure to form an assembly;

[0010] Step S5: Use a floating crane to hoist the welded and fixed assembly as a whole onto the end beam of the trolley traveling mechanism for assembly.

[0011] In an embodiment of the present invention, adjusting the position of the cylinder body in step S2 includes:

[0012] Guiding the cylinder body by using a guiding mechanism arranged on the cylindrical structure;

[0013] Positioning is performed using a positioning mechanism provided on the cylindrical structure and the cylindrical body.

[0014] In one embodiment of the present invention, the guide mechanism includes a guide plate;

[0015] Step S1 further includes:

[0016] A connecting guide plate is welded to the outside of the cylindrical structure.

[0017] In one embodiment of the present invention, the positioning mechanism includes an upper positioning seat, a lower positioning seat and a pin shaft, and the upper positioning seat and the lower positioning seat are connected by the pin shaft for positioning;

[0018] Step S1 further includes:

[0019] A lower positioning seat is welded and connected on the outer side of the cylindrical structure, and an upper positioning seat is welded and connected on the outer side of the lower end of the cylinder.

[0020] In one embodiment of the present invention, the jacking device includes an upper jacking support, a lower jacking support and a jack, the jack is detachably connected to the lower jacking support, and the jack corresponds to the upper jacking support to cooperate with the jacking cylinder;

[0021] Step S1 further includes:

[0022] A lower jacking support is welded and connected to the outer side of the cylindrical structure, and an upper jacking support is welded and connected to the outer side of the lower end of the cylinder.

[0023] In one embodiment of the present invention, step S3 further includes:

[0024] The verticality of the cylinder is detected by using a plumb line gauge, and the verticality of the cylinder is adjusted by using a lifting device based on the detection results of the plumb line gauge.

[0025] In one embodiment of the present invention, step S4 further includes:

[0026] Inspect the components after welding to ensure that the welding quality meets the preset installation requirements.

[0027] In one embodiment of the present invention, step S1 further includes:

[0028] An assembly lifting lug is provided on the inner wall of the upper end of the cylinder, and the lifting equipment is lifted through the assembly lifting lug.

[0029] In one embodiment of the present invention, step S1 further includes:

[0030] Arrange the beam at the on-site workstation, install sensors on the beam to monitor the horizontality of the beam in real time, and adjust the beam to be level.

[0031] In one embodiment of the present invention, in step S5, the two floating hook heads of the floating crane are connected to the locking hook tooling through steel wire ropes. The locking hook tooling is connected to the component through a hoisting wire rope, and the floating crane rotates the component during hoisting through the locking hook tooling.

[0032] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0033] The method for installing the gantry beam and the cylinder body proposed by the present invention hoists the cylinder body above the beam with a hoisting device at the on-site work station, aligns the bottom of the cylinder body with the cylindrical structure of the beam, and adjusts the position of the cylinder body to align the cylinder body with the cylindrical structure vertically and make the center lines coincide. Then, the lifting device outside the cylindrical structure and the cylinder body is used to adjust the verticality of the cylinder body, and the bottom of the cylinder body is welded and fixed to the top of the cylindrical structure to form a component. This method reduces the installation difficulty of the cylinder body and the beam, reduces the number of hoistings of the floating crane, and reduces the use cost of the floating crane.

[0034] In addition, in the technical solution of the present application, unless otherwise specifically stated, the present technical solution can be implemented by adopting conventional means in the art. Description of the Drawings

[0035] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a flowchart of the method for installing the beam and the cylinder body of the gantry in one embodiment of the present application;

[0037] Figure 2 It is a schematic diagram of the installation process of the beam and the cylinder body in one embodiment of the present application;

[0038] Figure 3 It is a schematic diagram of the positions of the guide plates and the positioning mechanisms on the beam and the cylinder body in one embodiment of the present application;

[0039] Figure 4 It is a schematic diagram of the positions of the lifting devices on the beam and the cylinder body in one embodiment of the present application;

[0040] Figure 5 It is a schematic diagram of the position of the general assembly lifting lug on the cylinder body in one embodiment of the present application;

[0041] Figure 6 In one embodiment of the present application Figure 3 Partial enlarged view of the guide plate;

[0042] Figure 7 For an embodiment of the present application Figure 3 Front view of the partial enlarged view of the upper positioning seat;

[0043] Figure 8 For an embodiment of the present application Figure 3 Top view of the partial enlarged view of the upper positioning seat;

[0044] Figure 9 For an embodiment of the present application Figure 3 Front view of the partial enlarged view of the lower positioning seat;

[0045] Figure 10 For an embodiment of the present application Figure 3 Top view of the partial enlarged view of the lower positioning seat;

[0046] Figure 11 For an embodiment of the present application Figure 3 Bottom view of the cylinder in the B-B view angle;

[0047] Figure 12 For an embodiment of the present application Figure 3 Top view of the cylindrical structure in the C-C view angle;

[0048] Figure 13 For an embodiment of the present application Figure 4 Partial enlarged view of the lifting device;

[0049] Figure 14 For an embodiment of the present application Figure 4 Top view of the cylindrical structure in the D-D view angle;

[0050] Figure 15 For an embodiment of the present application Figure 5 Top view of the cylinder in the A view angle;

[0051] Figure 16 Connection structure diagram of the floating hook head for an embodiment of the present application.

[0052] Explanation of the reference numerals in the drawings:

[0053] Cross beam 100; cylinder 200; guide plate 300; positioning mechanism 400; upper positioning seat 401; lower positioning seat 402; through hole 403; lifting device 500; upper lifting support 501; lower lifting support 502; jack 503; general assembly lifting lug 600; floating hook head 700; steel wire rope 701; locking hook tooling 800; hoisting steel wire rope 801. Detailed implementation manners

[0054] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, rather than all of the embodiments, and are only used to explain the present application, and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0055] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", "bottom", "top", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "superior", "inferior", "main", "secondary", etc. are only used for descriptive purposes and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0056] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0057] The large rotary gantry crane includes components such as a trolley traveling mechanism, a gantry end beam, a cross beam, a cylinder body, an upper slewing assembly, and a boom. Among them, the trolley traveling mechanism is fixed to the gantry end beam by a pin shaft. The upper end of the gantry end beam is installed and welded with a cross beam structure. The upper part of the cross beam structure is assembled and welded with a cylinder body. The upper part of the cylinder body is fixedly installed with a slewing assembly by a screw. The boom is connected to the slewing assembly by a pin shaft and fixed by a luffing wire rope. Since the weights of the components of this type of gantry crane are relatively large, its installation requires a large floating crane for operation. Among them, the connection method between the cross beam and the cylinder body is butt welding. First, the cross beam is installed, and then the cylinder body is lifted by a floating crane for welding. This installation method has a long hoisting operation time and high difficulty. Therefore, this embodiment proposes a new installation method for the cross beam and the cylinder body of the gantry crane. Refer to Figure 1 As shown, it schematically shows an installation method for the cross beam and the cylinder body of a gantry crane according to an embodiment of the present application, including the following steps S1 to S5:

[0058] Step S1: Arrange the crossbeam 100 and the cylinder 200 at the on-site work station. Use a hoisting device to lift the cylinder 200 above the crossbeam 100 so that the bottom of the cylinder 200 corresponds to the cylindrical structure on the crossbeam 100.

[0059] Specifically, as Figure 2 shown, place the crossbeam 100 on the on-site work station and adjust it to be horizontal. Use a falsework to pad the bottom of the crossbeam 100 solid to keep it stable. Then use a common gantry crane device to lift the cylinder 200 above the crossbeam 100 and align the bottom of the cylinder 200 with the cylindrical structure on the crossbeam 100. Compared with the traditional method of first installing the crossbeam 100 at the upper end of the gantry and then installing the cylinder 200, in this embodiment, the crossbeam 100 is stably placed on the flat ground of the on-site work station and then the cylinder 200 is hoisted by a hoisting device. A common gantry crane device can meet the hoisting requirements, and the common gantry crane has a lower cost than a floating crane.

[0060] Among them, the method of adjusting the crossbeam to be horizontal can be: install sensors on the crossbeam, such as an inclination sensor or a displacement sensor, to monitor the levelness of the crossbeam in real time, and adjust the crossbeam to be horizontal according to the monitored levelness of the crossbeam.

[0061] It should be noted that for the needs of subsequent installation steps, before arranging the crossbeam 100 and the cylinder 200 in step S1 and preparing for installation, auxiliary mechanisms required for assembling the crossbeam 100 and the cylinder 200 are installed on the crossbeam 100 and the cylinder 200 in advance. As Figure 3 shown, install a guiding mechanism on the upper outer side of the cylindrical structure of the crossbeam 100. Specifically, weld a guiding plate 300 on the upper outer side of the cylindrical structure as the guiding mechanism. Install a positioning mechanism 400 that cooperates with the cylindrical structure of the crossbeam 100 and the cylinder 200. Specifically, weld an upper positioning seat 401 on the outer side of the lower end of the cylinder 200 and weld a lower positioning seat 402 on the outer side of the cylindrical structure. As Figure 4 shown, in order to more accurately position the cylinder 200 during the installation process with the crossbeam 100, install a jacking device 500 at the corresponding position of the cylinder 200 and the cylindrical structure. Specifically, weld an upper jacking support 501 on the outer side of the lower end of the cylinder 200 and weld a lower jacking support 502 on the outer side of the cylindrical structure. As Figure 5 shown, install a general assembly lifting lug 600 on the inner wall of the upper end of the cylinder 200 to facilitate the hoisting device to hoist the cylinder 200 through the general assembly lifting lug 600.

[0062] Step S2: Place the cylinder 200 on the cylindrical structure through a hoisting device, and adjust the position of the cylinder 200 so that the cylinder 200 is vertically aligned with the cylindrical structure, and the center line of the cylinder 200 coincides with the center line of the cylindrical structure.

[0063] Specifically, as Figure 3As shown, a guiding mechanism provided on the cylindrical structure is used to guide the cylinder body 200. Positioning is performed by using the upper positioning seat 401 and the lower positioning seat 402 provided correspondingly on the cylindrical structure and the cylinder body 200.

[0064] As Figure 6 shown, a solution for the guiding plate 300 is exemplarily provided, but its shape and quantity do not constitute a limitation of the present invention on the shape and quantity of the guiding plate 300. Since the guiding plate 300 is installed on the outer side of the cylindrical structure, the side thereof close to the cylindrical structure is an outwardly beveled hypotenuse. When the edge of the barrel wall of the upper cylinder body 200 touches the hypotenuse on the side close to the cylindrical structure during the falling process, it will be guided by the hypotenuse to slide towards the barrel wall of the cylindrical structure, so that the circumferential contour of the cylinder body 200 is aligned with the barrel wall of the cylindrical structure. For the convenience of actual use, the guiding plate 300 is made of a wear-resistant material with a smooth surface.

[0065] As Figure 7 、 Figure 8 、 Figure 9 and Figure 10 shown, a solution for the positioning mechanism 400 is exemplarily provided, but its shape and quantity do not constitute a limitation of the present invention on the shape and quantity of the positioning mechanism 400. The positioning mechanism 400 includes an upper positioning seat 401 and a lower positioning seat 402 respectively welded at corresponding positions on the cylinder body 200 and the cylindrical structure. The upper positioning seat 401 and the lower positioning seat 402 respectively have through holes 403 of the same size. After aligning the cylinder body 200 and the cylindrical structure in the up-down direction through the guiding plate 300, the corresponding through holes 403 of the upper positioning seat 401 and the lower positioning seat 402 are connected by a pin shaft, so that the cylinder body 200 and the cylindrical structure are accurately positioned in the circumferential direction.

[0066] More specifically, as Figure 11 shown, an upper positioning seat 401 is provided at the 0 scale position of the circumferential section of the cylinder body 200. Correspondingly, as Figure 12 shown, a lower positioning seat 402 is provided at the 0 scale position of the circumferential section of the cylindrical structure. At the same time, guiding plates 300 are respectively provided at two positions of the 180 scale and the 270 scale on the circumferential section of the cylindrical structure. During the installation process, two points on the cylindrical structure are first determined through the guiding plates 300 at the two positions. When guiding the cylinder body 200 to be lowered towards the cylindrical structure, the circumferential section of the cylinder body 200 is aligned with the circumferential section of the cylindrical structure, and then through a pair of upper positioning seat 401 and lower positioning seat 402, the cylinder body 200 and the cylindrical structure are aligned in the circumferential direction.

[0067] Step S3: The cylinder body 200 is jacked up by a jacking device 500 provided on the outer sides of the cylindrical structure and the cylinder body 200 to adjust the verticality of the cylinder body 200.

[0068] As Figure 4As shown, a solution for a jacking device 500 is provided by way of example, but its position and quantity do not constitute a limitation of the present invention on the position and quantity of the jacking device 500. As Figure 13 As shown, the jacking device 500 includes an upper jacking support 501, a lower jacking support 502, and a jack 503. The jack 503 is detachably connected to the lower jacking support 502. The jack 503 cooperates with the upper jacking support 501 correspondingly to jack up the cylinder 200 to adjust the verticality of the cylinder 200 and the flatness of the flange at the upper end of the cylinder 200. The verticality of the cylinder 200 and the flatness of the flange at the upper end of the cylinder 200 will affect the overall assembly accuracy of the subsequent portal crane. Therefore, the jacking device 500 can improve the positioning accuracy of the cylinder 200 and the crossbeam 100 and enhance the assembly quality.

[0069] Exemplarily, as Figure 14 shown, a set of corresponding jacking devices 500 can be provided every 90 degrees on the circumferential line of the cylinder 200 and the cylindrical structure, and a total of 4 sets of centrally symmetric jacking devices 500 are provided. To determine the verticality of the cylinder 200, a plumb bob can be used to detect the verticality of the cylinder 200. While detecting the verticality, based on the detection results detected by the plumb bob, by adjusting the height of the jacks 503 at four positions to jack up or drop, the cylinder 200 can be adjusted to be vertical or reach the verticality required for assembly.

[0070] Step S4: Weld and fix the bottom of the cylinder 200 to the top of the cylindrical structure to form an assembly.

[0071] Further, the welded and fixed assembly is inspected to determine that the welding quality meets the preset installation requirements.

[0072] Step S5: Use a floating crane to hoist the welded and fixed assembly as a whole onto the end beam of the gantry traveling mechanism for assembly.

[0073] As Figure 5 shown, a general assembly lifting lug 600 is provided on the inner wall at the upper end of the cylinder 200. The general assembly lifting lug 600 can not only meet the requirements for hoisting during the installation of the cylinder 200 and the crossbeam 100, but also be used when hoisting the assembly of the cylinder 200 and the crossbeam 100. The general assembly lifting lug 600 is designed on the inner wall of the upper part of the cylinder structure, which is convenient for the installation of the hoisting wire rope and shackle, avoids the interference between the shackle and the cylinder flange, and does not affect the appearance of the cylinder and can be retained on the structure. Specifically, as Figure 15 shown, four general assembly lifting lugs 600 are provided on the inner wall of the cylinder 200. The positions of the four general assembly lifting lugs 600 are centrally symmetric with respect to the center of the circumferential section of the cylinder 200.

[0074] As Figure 16As shown in the figure, the two floating hook heads 700 of the floating crane are connected to the locking hook tooling 800 through the steel wire ropes 701. The locking hook tooling 800 is connected to the assembly of the cylinder body 200 and the cross beam 100 through the hoisting steel wire rope 801, so that the double-hook hoisting of the floating crane becomes single-hook hoisting, which not only ensures that the load-bearing capacity of the floating crane can be satisfied, but also realizes that the single hook can rotate to meet the positioning at different angles.

[0075] In summary, for the installation method of the cross beam and the cylinder body of the portal crane proposed by the present invention, the cylinder body 200 is hoisted above the cross beam 100 by a hoisting device at the on-site work station, so that the bottom of the cylinder body 200 corresponds to the cylindrical structure of the cross beam 100, and the position of the cylinder body 200 is adjusted to align the cylinder body 200 with the cylindrical structure vertically and make the center lines coincide. Then, the lifting device 500 outside the cylindrical structure and the cylinder body 200 is used to adjust the verticality of the cylinder body 200, and the bottom of the cylinder body 200 is welded and fixed to the top of the cylindrical structure to form an assembly. This method reduces the installation difficulty of the cylinder body 200 and the cross beam 100, reduces the hoisting times of the floating crane, and reduces the use cost of the floating crane.

[0076] Based on the above embodiments of the present application, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0077] The above are only some embodiments of the present application, which are only used to illustrate the technical solutions of the present application and are not intended to limit them. It should be understood that for those of ordinary skill in the art, without departing from the creative concept of the present application, improvements or replacements can be made according to the above description, and all such improvements and replacements should belong to the protection scope of the present application. In this case, all details can be replaced by equivalent elements, and the materials, shapes and sizes can also be arbitrary.

Claims

1. A method for installing the crossbeam and the cylinder body of a door machine, characterized in that, Including: Step S1: Arrange the cross beam and the cylinder body at the on-site work station. Lift the cylinder body above the cross beam by a hoisting device so that the bottom of the cylinder body corresponds to the cylindrical structure on the cross beam. Step S2: Place the cylinder body on the cylindrical structure by the hoisting device, and adjust the position of the cylinder body so that the cylinder body and the cylindrical structure are vertically aligned, and the center line of the cylinder body coincides with the center line of the cylindrical structure. Step S3: Jack up the cylinder body by a jacking device arranged outside the cylindrical structure and the cylinder body to adjust the verticality of the cylinder body. Step S4: Weld and fix the bottom of the cylinder body and the top of the cylindrical structure to form an assembly. Step S5: Use a floating crane to hoist the welded and fixed assembly as a whole onto the end beam of the trolley traveling mechanism for assembly.

2. The installation method of the crossbeam and the cylinder body of the door machine according to claim 1, characterized in that, In step S2, adjusting the position of the cylinder body includes: Guiding the cylinder body by a guiding mechanism arranged on the cylindrical structure. Positioning by a positioning mechanism arranged on the cylindrical structure and the cylinder body.

3. The method for installing the cross beam and the cylinder body of the door machine according to claim 2, characterized in that, The guiding mechanism includes a guiding plate. Step S1 further includes: Weld and connect the guiding plate outside the cylindrical structure.

4. The method for installing the crossbeam and the cylinder body of the door machine according to claim 2, characterized in that, The positioning mechanism includes an upper positioning seat, a lower positioning seat and a pin shaft. The upper positioning seat and the lower positioning seat are connected by the pin shaft for positioning. Step S1 further includes: Weld and connect the lower positioning seat outside the cylindrical structure, and weld and connect the upper positioning seat outside the lower end of the cylinder body.

5. The installation method of the crossbeam and the cylinder body of the door machine according to claim 1, characterized in that, The jacking device includes an upper jacking support, a lower jacking support and a jack. The jack is detachably connected to the lower jacking support, and the jack corresponds and cooperates with the upper jacking support to jack up the cylinder body. Step S1 further includes: Weld and connect the lower jacking support outside the cylindrical structure, and weld and connect the upper jacking support outside the lower end of the cylinder body.

6. The installation method of the cross beam and the cylinder body of the door machine according to claim 1, characterized in that, Step S3 further includes: Detect the verticality of the cylinder body by a plumb bob, and based on the detection result detected by the plumb bob, adjust the verticality of the cylinder body by the jacking device.

7. The installation method of the crossbeam and the cylinder body of the door machine according to claim 1, characterized in that, Step S4 further includes: Detect the welded and fixed assembly to determine that the welding quality meets the preset installation requirements.

8. The installation method of the cross beam and the cylinder body of the door machine according to claim 1, characterized in that, Step S1 further includes: Arrange a general assembly lifting lug on the inner wall of the upper end of the cylinder body, and the hoisting device hoists through the general assembly lifting lug.

9. The installation method of the cross beam and the cylinder body of the door machine according to claim 1, characterized in that, Step S1 further includes: Arrange the cross beam at the on-site work station, install a sensor on the cross beam to monitor the levelness of the cross beam in real time, and adjust the cross beam to be horizontal.

10. The method for installing the cross beam and the cylinder body of the door machine according to claim 1, characterized in that, In step S5, the two floating hook heads of the floating crane are connected to a locking hook tooling through steel wire ropes, the locking hook tooling is connected to the assembly through a hoisting steel wire rope, and the floating crane rotates the assembly through the locking hook tooling during hoisting.

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