Method for transferring and installing large cylindrical equipment in indoor limited space

Abstract

The invention provides a method for transferring and installing large cylindrical equipment in an indoor limited space. The method comprises the following steps that a temporary supporting frame is welded to the tail end of the large cylindrical equipment; a large lorry-mounted crane is used for hoisting and positioning the large cylindrical equipment to enter in an inclined mode; a large lorry-mounted crane and a small lorry-mounted crane are used for cooperation for hoisting; the small lorry-mounted crane and the large lorry-mounted crane rotate the large cylindrical equipment, and after the large cylindrical equipment is rotated to be in the horizontal direction, the large cylindrical equipment is placed on the transfer trolley; and the small lorry-mounted crane and the electric hoist drag the transfer trolley to advance, and the large cylindrical equipment is hoisted to a target position. Through cooperation of the large lorry-mounted crane, the small lorry-mounted crane and the transfer trolley, the large cylindrical equipment is hoisted into the indoor limited space.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment installation. Specifically, it relates to a method for transporting and installing large cylindrical equipment in an indoor confined space. Background Art

[0002] When transporting and installing large equipment indoors, since the pre-installation position of the large equipment is within the indoor floor slab, and there is a basement below the floor slab, the load-bearing capacity of the structural floor slab is limited. Therefore, there is a clear tonnage limit for the weight of the lifting equipment. Since the length of the large equipment is limited by the spacing between indoor columns and cannot be horizontally transported in, the indoor is in a sealed state and there are restrictions on the width and height of beams and columns. There are embedded foundation restrictions in the front inside the indoor where the large equipment is to be installed. The large crane cannot be hoisted into place in one go, nor can a transportation channel be set up to transport it in.

[0003] In the existing large equipment installation technology, CN113859274A discloses a method for installing large equipment in place in a narrow indoor space, including the following steps: vertically placing several jacks in the installation foundation surface, building a temporary transfer channel, installing a temporary transfer base at the starting end of the temporary transfer channel, installing an electric hoist, and using a crane to hoist the large equipment onto the temporary transfer base: starting the electric hoist to tow the temporary transfer base together with the large equipment to directly above the support plane: turning off the electric hoist and removing part of the temporary transfer channel around the support plane: slowly lowering the large equipment until it is completely placed on the installation foundation surface. The method of the present invention does not require manual traction, saves time and effort, creates a good construction condition for construction personnel, greatly improves work efficiency and the quality of the installation project. At the same time, it does not damage the external structure of the large equipment, ensures the safety of the large equipment, and also realizes the rapid, accurate and efficient installation in place of the equipment.

[0004] However, it still has the following problems:

[0005] 1. This technology can only transport large equipment in a straight line to a designated location. If the length of the large equipment is greater than the spacing between indoor beams and columns, it will not be able to be transported to the designated position.

[0006] 2. If there is an embedded foundation blocking in front of the designated installation position, when a temporary transfer channel needs to be built, the height of the temporary channel needs to be higher than the height of the front embedded foundation. The entrance to the indoor is limited, and coupled with the height of the large equipment itself, the large equipment cannot be transported into the indoor.

[0007] The background description provided in this article is for the purpose of presenting the context of the present disclosure generally. Unless otherwise indicated herein, the materials described in this section are not prior art to the claims of this application and should not be admitted to be prior art by including them in this section. Summary of the Invention

[0008] In view of the above technical problems in the related art, the present invention provides a method for transporting and installing large cylindrical equipment in an indoor confined space. The large cylindrical equipment is provided with a lifting ring and a middle gear ring; the method specifically includes the following steps:

[0009] S1, weld a temporary support frame at the tail end of the large cylindrical equipment;

[0010] S2, tie a rope on the center line of the middle gear ring in the middle section of the large cylindrical equipment, and then use a large truck-mounted crane to hoist and position the large cylindrical equipment to enter obliquely; the head end of the large cylindrical equipment enters the confined indoor space, and place a square wood at the head end of the large cylindrical equipment;

[0011] S3, the large truck-mounted crane gets closer to the indoor ground, and a small truck-mounted crane is positioned on the other side of the large cylindrical equipment; the large truck-mounted crane hoists the middle gear ring section of the large cylindrical equipment again, and the small truck-mounted crane hoists the temporary support frame at the tail end of the large cylindrical equipment, and continuously pushes the large cylindrical equipment into the room. After the large cylindrical equipment is hoisted into the indoor ground close to the embedded foundation, place a square wood at the head end of the large cylindrical equipment;

[0012] S4, the small truck-mounted crane enters the room and is positioned on one side of the large cylindrical equipment, and the large truck-mounted crane adjusts its position to the rear of the large cylindrical equipment. Then the large truck-mounted crane hoists the temporary support frame at the tail end of the large cylindrical equipment, and the small truck-mounted crane hoists the middle gear ring and pushes it deep into the room;

[0013] S5, the small truck-mounted crane goes deep into the room, the large truck-mounted crane hoists the preset lifting ring of the large cylindrical equipment, and the small truck-mounted crane hoists the middle gear ring. Subsequently, the large cylindrical equipment rotates. After the large cylindrical equipment rotates to the horizontal direction, the large truck-mounted crane slowly lowers the temporary support frame at the tail of the large cylindrical equipment to the transfer trolley, and the head end of the large cylindrical equipment is placed on the cushion wood of another transfer trolley;

[0014] S6, the small truck-mounted crane adjusts its position in the room and hoists the large cylindrical equipment through the lifting ring or the middle gear ring, and uses an electric hoist to pull the transfer trolley and slowly tow the transfer trolley forward along the ground to hoist the large cylindrical equipment to the target position.

[0015] Specifically, before step S1, it further includes: building a temporary transfer passage 2, which is a passage from the outside to the inside of the room, and the temporary transfer passage is a passage for the transfer trolley to enter the indoor confined space.

[0016] Specifically, the temporary transfer passage is detachable.

[0017] Specifically, strip steel plates are laid on the floor slab to form the temporary transfer passage.

[0018] Specifically, the temporary support frame is welded into a whole by square steel pipes, and the whole presents a triangular stable structure.

[0019] Specifically, the transfer trolley is welded into a structural body by using 16# channel steel, and four tracked vehicles are used as rotating devices.

[0020] Specifically, step S2 further includes: after the head end of the large cylindrical equipment is hoisted into the indoor ground for a part, it slowly descends nearby. First, the tail end temporary support frame of the large cylindrical equipment lands on the square wood on the compacted outdoor ground, and then the head end of the large cylindrical equipment slowly descends on the square wood on the indoor ground and is leveled with square wood. After the large cylindrical equipment lands stably, the hoisting is released.

[0021] Specifically, step S5 further includes: welding the tail end temporary support frame of the large cylindrical equipment and the transfer trolley. First, the three-sided channel steel at the top of the transfer trolley is welded to the temporary support frame body by 4 channel steels, and then 4 channel steels are inserted into both sides of the temporary support frame, and spot welding is carried out between the channel steels and the temporary support frame to form an eight-character shape.

[0022] Specifically, step S6 further includes: installing the electric hoist on the equipment foundation or building holes and columns deep in the room.

[0023] The present invention uses 2 truck-mounted cranes with different tonnages and pre-customized lifting rings and temporary support frames on the large cylindrical equipment, solves the problem that the large cylindrical equipment cannot enter the room due to the limitations of the size and height of the indoor door frame beams and columns, and realizes the rotation of the large cylindrical equipment indoors to facilitate the subsequent transfer of the large cylindrical equipment.

[0024] In the present invention, the large cylindrical equipment lands on the transfer trolley, and the transfer trolley uses the electric hoist to provide traction force on the temporary passage and together with the small truck-mounted crane, transfers the large cylindrical equipment to the designated installation location. It solves the difficulty that the large truck-mounted crane cannot enter the room to hoist the large cylindrical equipment to the designated position due to the limitation of the floor bearing capacity. Further, the transfer trolley uses the traction force provided by the electric hoist and the small truck-mounted crane to complete the transfer of the large cylindrical equipment. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a flowchart of a method for transporting and installing large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of a temporary transfer passage provided by an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of a temporary support frame provided by an embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of a transfer trolley provided by an embodiment of the present invention;

[0030] Figure 5 It is one of the schematic diagrams of a large truck-mounted crane hoisting large cylindrical equipment provided by an embodiment of the present invention;

[0031] Figure 6 It is the second of the schematic diagrams of a large truck-mounted crane hoisting large cylindrical equipment provided by an embodiment of the present invention;

[0032] Figure 7 It is one of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0033] Figure 8 It is the second of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0034] Figure 9 It is the third of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0035] Figure 10 It is the fourth of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0036] Figure 11 It is the fifth of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0037] Figure 12 It is the sixth of the schematic diagrams of the transportation and installation of large cylindrical equipment in an indoor confined space provided by an embodiment of the present invention;

[0038] Figure 13It is the seventh schematic diagram of the transfer and installation of a large cylindrical device in a confined indoor space provided by an embodiment of the present invention;

[0039] Figure 14 It is the eighth schematic diagram of the transfer and installation of a large cylindrical device in a confined indoor space provided by an embodiment of the present invention;

[0040] Figure 15 It is the ninth schematic diagram of the transfer and installation of a large cylindrical device in a confined indoor space provided by an embodiment of the present invention;

[0041] Figure 16 It is the tenth schematic diagram of the transfer and installation of a large cylindrical device in a confined indoor space provided by an embodiment of the present invention;

[0042] Figure 17 It is a schematic diagram of the temporary position of a large cylindrical device in a confined indoor space provided by an embodiment of the present invention;

[0043] Figure 18 It is the second schematic diagram of the transfer and installation of a large cylindrical device provided by an embodiment of the present invention;

[0044] Figure 19 It is the third schematic diagram of the transfer and installation of a large cylindrical device provided by an embodiment of the present invention;

[0045] Figure 20 It is the fourth schematic diagram of the transfer and installation of a large cylindrical device provided by an embodiment of the present invention.

[0046] Among them, 100 is a confined indoor space; 101 is a column; 1 is a transfer trolley; 2 is a temporary transfer passage; 3 is a large cylindrical device; 4 is a temporary support frame; 5 is a large truck-mounted crane; 6 is a square wood; 7 is a small truck-mounted crane; 8 is a lifting ring; 9 is a middle gear ring; 10 is a rope; 11 is an electric hoist; 12 is a welded channel steel. Specific implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0048] Reference Figure 1 , this embodiment discloses a method for transferring and installing a large cylindrical device in a confined indoor space, which includes the following steps:

[0049] S1, welding a temporary support frame on the tail end of the large cylindrical device;

[0050] Reference Figure 2, the method for transporting and installing large cylindrical equipment in an indoor confined space in this embodiment is applied to an indoor confined space, which can be an indoor space as described in Figure 2 . The indoor confined space can be an indoor space with a constructed enclosure, and there are one or more columns 101 inside the enclosure. In a more general case, a large truck-mounted crane 5 cannot drive into the indoor confined space, while a small truck-mounted crane 7 and a transfer cart 1 can drive into the indoor confined space. Those skilled in the art know that in general, the indoor confined space in this embodiment is such that a large truck-mounted crane cannot drive into it, while a small truck-mounted crane can drive into it.

[0051] In one embodiment, in the indoor confined space, there is a floor slab, and below the floor slab is a basement. The load-bearing capacity of the structural floor slab is limited, so there is a clear tonnage limit for the weight of the truck-mounted crane. Since the length of the large equipment is limited by the spacing of the indoor columns and cannot be horizontally transported in, the indoor is in a sealed state and there are width and height restrictions on the beams and columns. There is a pre-buried foundation limit at the position where the large equipment is installed near the inner front side of the indoor, and the large crane cannot be hoisted into place in one go, nor can a transportation channel be set up to transport it in.

[0052] The large truck-mounted crane in this embodiment has a hoisting capacity to lift large equipment over a long distance, but it cannot enter the indoor due to the excessive weight of the equipment itself; the small truck-mounted crane has a hoisting capacity alone when meeting the requirements of the floor load, but the hoisting radius is only half that of the large truck-mounted hoisting equipment. The large truck-mounted crane cannot enter the indoor, while the small truck-mounted crane can enter the indoor.

[0053] Before step S1 in this embodiment, it further includes: building a temporary transfer channel 2, which is a channel from the outside to the inside of the room, and the temporary transfer channel is a channel for the transfer cart to enter the indoor confined space;

[0054] In this embodiment, the outdoor site is first leveled, covered with soil and compacted to ensure the compaction coefficient, so as to ensure that the bearing capacity of the foundation meets the bearing capacity requirements, and then a temporary transfer channel is built. The temporary transfer channel is a channel from the outside to the inside of the room, and its purpose is to facilitate the transfer cart 1 to enter the room. Specifically, leveling, covering with soil and compacting the outdoor site are common methods in the art for leveling, covering with soil and compacting, and this embodiment will not elaborate, only that it can meet the working conditions of the small truck-mounted crane and the large truck-mounted crane.

[0055] The temporary transfer channel can support the transfer cart to enter the room. When the temporary transfer channel can meet the requirements for the transfer cart to enter the room, its position is selected according to the on-site conditions.

[0056] Further, in this embodiment, a transfer ramp also needs to be built. The transfer ramp is used for a small truck-mounted crane to enter the room. The transfer ramp is a temporary ramp formed by earth backfilling, and its specific position is set according to the actual on-site needs.

[0057] Specifically, the temporary transfer passage is detachable. In one embodiment, the temporary transfer passage can be laid with steel plates. In one embodiment, there can be 2 or more temporary transfer passages.

[0058] Specifically, the temporary transfer passage is realized by laying strip steel plates on the floor slab surface. Its functions are to protect the floor slab, level the ground, and at the same time reduce the friction between the transfer trolley and the ground, which is beneficial to the movement of the transfer trolley 1.

[0059] Reference Figure 18 , in this embodiment, a lifting ring 8 is first welded on the large cylindrical equipment, or the lifting ring 8 is pre-manufactured on the large cylindrical equipment. In addition, the large cylindrical equipment also includes a middle gear ring 9, and the middle gear ring 9 can also be welded on the large cylindrical equipment or pre-manufactured on the large cylindrical equipment. The lifting ring and the middle gear ring are used for the hoisting of the large cylindrical equipment. The middle gear ring 9 is two rings around the cylindrical equipment.

[0060] Specifically, the large cylindrical equipment in this embodiment cannot be hoisted into the indoor restricted space alone by a small truck-mounted crane.

[0061] Reference Figure 3 , the temporary support frame is welded into a whole by square steel pipes, presenting a triangular stable structure as a whole. Then, the upper square steel pipes of the temporary support frame are spot-welded after being fitted to both ends of the large cylindrical equipment. Secondly, because the large cylindrical equipment is high in the middle and low at both ends, in order to keep the large cylindrical equipment at the same level during transportation, it is also temporarily stored on the ground.

[0062] Specifically, both ends of the temporary support frame are triangular structures, and its bottom is connected by steel pipes.

[0063] Reference Figure 4 , the method of this embodiment also uses a transfer trolley. The transfer trolley is welded into a structural body with 16# channel steel, and four tank cars (each tank car is composed of two universal wheels + two straight wheels, and the load-bearing requirement of the tank car is: not less than the weight of the equipment with the planned load) are used as the rotating device. Among them, the steel turntable on the tank car is welded into one body with the channel steel of the vehicle body main body, and full welding is adopted.

[0064] S2. Tie a rope to the center line of the gear ring in the middle section of the large cylindrical equipment, and then use a large truck-mounted crane to hoist and position the large cylindrical equipment to enter obliquely. The front end of the large cylindrical equipment enters the restricted indoor space, and square timbers are placed at the front end of the large cylindrical equipment.

[0065] First hoisting: The large truck-mounted crane is positioned on one side of the outdoor site and its outriggers are extended. A steel plate with a size of 1500x1500mm and a thickness of 25mm needs to be placed under each outrigger. Since the length of the large cylindrical equipment is greater than the length between the two columns indoors, when using a large truck-mounted crane to hoist the large cylindrical equipment, it cannot directly enter the room parallel. Therefore, the large cylindrical equipment is hoisted and positioned to enter obliquely for the first time by the large truck-mounted crane. A rope is tied to the center line of the gear ring in the middle section of the large cylindrical equipment, and then hoisting is carried out. During the hoisting process, manual traction is used to prevent the lifted object from rotating randomly.

[0066] Reference Figure 6 , after the front end of the large cylindrical equipment enters a part of the indoor ground through hoisting, it descends slowly nearby. First, the temporary support frame at the tail end of the large cylindrical equipment lands on the square timbers on the compacted outdoor ground, and then the front end of the large cylindrical equipment slowly descends on the square timbers on the indoor ground and is leveled with square timbers. After the large cylindrical equipment lands stably, the hoisting is released.

[0067] S3. The large truck-mounted crane gets closer to the indoor ground, and the small truck-mounted crane is positioned on the other side of the large cylindrical equipment. The large truck-mounted crane hoists the middle gear ring section of the large cylindrical equipment again, and the small truck-mounted crane holds the temporary support frame at the tail end of the large cylindrical equipment to assist in pushing the large cylindrical equipment continuously into the room. After the large cylindrical equipment enters the indoor ground near the embedded foundation through hoisting, square timbers are placed at the front end of the large cylindrical equipment.

[0068] Reference Figures 7 - 10 , Second hoisting: The large truck-mounted crane finely adjusts its position and gets closer to the indoor ground. The small truck-mounted crane is positioned on the other side of the large cylindrical equipment. The two cranes extend their outriggers, and steel plates are laid under the outriggers, and then the second hoisting begins.

[0069] The large truck-mounted crane hoists the middle gear ring section of the large cylindrical equipment again, and the small truck-mounted crane holds the temporary support frame at the tail end of the large cylindrical equipment to play an auxiliary role and continuously pushes the large cylindrical equipment into the room.

[0070] Before and after the large cylindrical equipment is hoisted into the indoor ground near the embedded foundation, the large cylindrical equipment slowly descends and is temporarily stored on the indoor ground nearby. During the descent, the tail-end temporary support frame of the large cylindrical equipment lands on the square wooden beams on the compacted outdoor ground, and the end part slowly descends onto the cushion wood of the indoor embedded foundation. After stabilization, the hoisting is released.

[0071] S4. The small truck-mounted crane enters the room and is positioned on one side of the large cylindrical equipment. The large truck-mounted crane adjusts its position to the rear of the large cylindrical equipment. Then the large truck-mounted crane hoists the tail-end temporary support frame of the large cylindrical equipment, and the small truck-mounted crane hoists the middle gear ring and advances it deep into the room.

[0072] Reference Figures 11 - 13 , The third hoisting: Subsequently, the small truck-mounted crane enters the room along the pre-laid temporary ramp and is positioned on one side of the large cylindrical equipment. Then the small truck-mounted crane extends its crane outriggers, with the outrigger near-beams placed. The large truck-mounted crane adjusts its position to the rear of the large cylindrical equipment and waits. Then the two truck-mounted cranes switch the hoisting positions. The large truck-mounted crane hoists the tail-end temporary support frame of the large cylindrical equipment, and the small truck-mounted crane hoists the middle gear ring (protected by padding with rubber rings), and then advances it deep into the room.

[0073] After the middle gear ring section passes over the front embedded foundation, the large truck-mounted crane controls the tail end to slowly descend to the cushion wood on the indoor ground. Subsequently, the small truck-mounted crane slowly lowers the middle gear ring to the temporary pier, and the pier is padded flat with square wooden beams to make it stable.

[0074] S5. The small truck-mounted crane moves deeper into the room. The large hoisting equipment hoists the preset lifting ring of the large cylindrical equipment, and the small truck-mounted hoisting equipment hoists the middle gear ring. Subsequently, the large cylindrical equipment rotates. After the large cylindrical equipment rotates to the horizontal direction, the large truck-mounted hoisting equipment slowly lowers the tail-end temporary support frame of the large cylindrical equipment to the transfer trolley, and the front end of the large cylindrical equipment is placed on the cushion wood of another transfer trolley.

[0075] Reference Figures 14 - 17 , The large truck-mounted crane synchronously adjusts its position. The tail of the large truck-mounted crane is as close as possible to the indoor area (increasing the hoisting radius). Then the outriggers are deployed synchronously. The small truck-mounted crane moves deeper into the room along the ramp. At this time, the transfer trolley adjusts its position and is positioned on the temporary passage, and then the crane outriggers are extended, with the outrigger near-beams placed.

[0076] The preset lifting rings of the large truck-mounted crane lift the large cylindrical equipment, and the small truck-mounted crane lifts the middle gear ring. Subsequently, the large cylindrical equipment rotates. This process is carried out slowly. After the large cylindrical equipment rotates to the horizontal direction, the large truck-mounted crane slowly lowers the temporary support frame at the tail of the large cylindrical equipment to the transfer trolley, and the head end of the large cylindrical equipment is placed on the wooden pads of another transfer trolley.

[0077] Then, the on-site operators weld the temporary support frame at the tail end of the large cylindrical equipment to the transfer trolley, and insert square timbers into the gap between the two to level them. First, weld the three-sided channel steel at the top of the transfer trolley to the temporary support frame body through 4 channel steels, and then insert 4 channel steels on both sides of the temporary support frame. Spot weld between the channel steel and the temporary support frame to form an octagonal shape. There is a 5 cm distance between the channel steel and the ground, which is used to prevent the large cylindrical equipment from slipping during the transportation process when the tank truck passes through the pulling force provided by the electric hoist, playing a role in restricting rollover and preventing floating, and realizing the stability during the movement of the transfer trolley and the large cylindrical equipment. The role of the wooden pad between the two during this process is to form a force transmission path to make the force transmission clear. The large truck-mounted crane ends the hoisting, and the small truck-mounted crane continues the hoisting process.

[0078] S6. The small truck-mounted crane adjusts its position in the room and lifts the large cylindrical equipment through the lifting ring or the middle gear ring, and uses an electric hoist to pull the transfer trolley and slowly tow the transfer trolley forward along the ground to hoist the large cylindrical equipment to the target position.

[0079] Reference Figures 19 - 20 , Subsequently, the small truck-mounted crane adjusts its position into the room, and then simultaneously uses the equipment foundation or building holes and columns deep in the room to provide reaction force, installs an electric hoist, pulls the transfer trolley, and slowly tow the transfer trolley forward along the ground. The small truck-mounted crane provides the hoisting force and plays a role in preventing the large equipment from falling during the transfer process, and the towing direction is controlled by the transfer trolley. After the large cylindrical equipment reaches the designated foundation location, unloading and installation are carried out.

[0080] The small truck-mounted crane lifts it, and then gradually removes the welding between the temporary support and the large cylindrical equipment, and the large cylindrical equipment falls to the designated installation position.

[0081] The present invention solves the problem that the large cylindrical equipment cannot enter the room due to the limitations of the size and height of the indoor door frame beams and columns by using two truck-mounted cranes with different tonnages and pre-customizing lifting rings and temporary support frames on the large cylindrical equipment, and realizes the rotation of the large cylindrical equipment in the room to facilitate the subsequent transfer of the large cylindrical equipment.

[0082] In the present invention, a large cylindrical device is placed on a transfer trolley. The transfer trolley uses an electric hoist to provide traction on a temporary passage and, together with a small truck-mounted crane, transfers the large cylindrical device to a designated installation location. This solves the problem that due to the limited floor bearing capacity, a large truck-mounted crane cannot enter the indoor area to hoist the device to the designated position. Further, the transfer trolley uses the traction provided by the electric hoist and the small truck-mounted crane to complete the transfer of the large cylindrical device.

[0083] Further, during the hoisting process, since the large cylindrical device is supported by a temporary support frame and the bottom-slinging form is adopted during the hoisting process, and rubber pads are used while bottom-slinging, thus better protecting the finished product.

[0084] The above are only the 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 within the protection scope of the present invention.

Claims

1. A method for transporting and installing a large cylindrical device in a confined indoor space. The large cylindrical device is provided with a lifting ring and a middle gear ring. Specifically, it includes the following steps: It is characterized in that: S1. Weld a temporary support frame at the tail end of the large cylindrical device. S2. Tie a rope on the center line of the middle gear ring in the middle section of the large cylindrical device, and then use a large truck-mounted crane to hoist and position the large cylindrical device to enter obliquely. The head end of the large cylindrical device enters the confined indoor space, and a square wood is placed at the head end of the large cylindrical device. S3. The large truck-mounted crane gets closer to the indoor ground, and a small truck-mounted crane is positioned on the other side of the large cylindrical device. The large truck-mounted crane hoists the middle gear ring section of the large cylindrical device again, and the small truck-mounted crane hoists the temporary support frame at the tail end of the large cylindrical device, and continuously pushes the large cylindrical device into the room. After the large cylindrical device is hoisted into the indoor ground close to the embedded foundation, a square wood is placed at the head end of the large cylindrical device. S4. The small truck-mounted crane enters the room and is positioned on one side of the large cylindrical device. The large truck-mounted crane adjusts its position to the rear of the large cylindrical device, and then the large truck-mounted crane hoists the temporary support frame at the tail end of the large cylindrical device, and the small truck-mounted crane hoists the middle gear ring and pushes it deep into the room. S5. The small truck-mounted crane goes deep into the room, the large truck-mounted crane hoists the preset lifting ring of the large cylindrical device, the small truck-mounted crane hoists the middle gear ring, and then the large cylindrical device rotates. After the large cylindrical device rotates to the horizontal direction, the large truck-mounted crane slowly lowers the temporary support frame at the tail of the large cylindrical device onto the transfer cart, and the head end of the large cylindrical device is placed on the cushion wood of another transfer cart. S6. The small truck-mounted crane adjusts its position in the room and hoists the large cylindrical device through the lifting ring or the middle gear ring, and uses an electric hoist to pull the transfer cart and slowly tow the transfer cart forward along the ground to hoist the large cylindrical device to the target position.

2. The method according to claim 1, wherein: Before step S1, it further includes: building a temporary transfer passage (2). The temporary transfer passage is a passage from the outside to the inside of the room, and the temporary transfer passage is a passage for the transfer cart to enter the indoor confined space.

3. The method according to claim 2, characterized in that: The temporary transfer passage is detachable.

4. The method according to claim 3, wherein: Lay strip steel plates on the floor slab to form the temporary transfer passage.

5. The method according to claim 4, wherein: The temporary support frame is welded into a whole by square steel pipes, and the whole presents a triangular stable structure.

6. The method according to claim 5, wherein: The transfer cart is welded into a structural body with 16# channel steel, and four tank cars are used as rotating devices.

7. The method according to claim 6, wherein: Step S2 further includes: after a part of the head end of the large cylindrical device enters the indoor ground through hoisting, it slowly descends nearby. First, the temporary support frame at the tail end of the large cylindrical device lands on the square wood on the compacted outdoor ground, and then the head end of the large cylindrical device slowly descends on the square wood on the indoor ground and is leveled with square wood. After the large cylindrical device lands stably, the hoisting is released.

8. The method according to claim 7, wherein: The step S5 further includes: welding the temporary support frame at the tail end of the large cylindrical equipment and the transfer trolley. First, weld the three-sided channel steel at the top of the transfer trolley and the temporary support frame body with 4 channel steels, and then insert 4 channel steels into both sides of the temporary support frame, and spot-weld between the channel steels and the temporary support frame to form an eight-character shape.

9. The method according to claim 8, wherein: The step S6 further includes: installing the electric hoist on the equipment foundation or building holes and columns deep in the room.

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