Method for transporting plate cabinets in narrow space

Abstract

The invention relates to the technical field of building construction, in particular to a method for transporting a plate cabinet in a narrow space, which realizes non-destructive and efficient transfer of the plate cabinet from the ground to a power distribution room through a hoisting hole and a hoisting platform through the combination of a simple hoisting device and a transition platform; a completed power distribution room window / wall body does not need to be dismantled, the existing hoisting holes and platforms are utilized to adapt to batch transfer of a plurality of plate cabinets, and structural damage and repeated investment of a traditional scheme are avoided; operation of all links is clear, and operation errors are reduced; the combination of the simple hoisting device and the transition platform solves the problems of height difference and response, the synchronous operation of the chain block ensures that the cabinet body is not inclined, and no safety accident is caused during transfer.

Description

Technical Field

[0001] This invention relates to the field of technology, specifically to a method for transporting cabinets in a confined space. Background Technology

[0002] In power distribution engineering construction, if the power distribution room is designed on the second floor, the traditional panel transportation plan requires reserving equipment passages in advance (such as after-built walls, uninstalled windows / door openings), or setting up protruding beams and slabs on the second floor and reserving hoisting platforms. The panels are then lifted directly to the reserved platform on the second floor by an external crane, and then transported indoors by a forklift. However, in actual construction, the power distribution room is often already completed (windows are closed, walls are built, and no equipment passages are reserved), making the traditional external crane hoisting plan completely ineffective. In this case, the only option is to rely on the existing hoisting platform on the second floor (which has hoisting holes connecting to the ground and is equipped with electric hoists) to achieve panel transportation.

[0003] However, the traditional solution relying on hoists on lifting platforms has two major problems: First, the elevation difference is problematic. The lifting platform is 1 meter lower than the floor level inside the distribution room, while the hoist's lifting height is limited, only able to raise the switchboard to a position 10cm higher than the lifting platform, leaving a 90cm height difference between the platform and the floor, making direct horizontal movement into the room impossible. Second, there are access obstacles. Even if the elevation difference is overcome by lifting equipment, the forklift inside the distribution room cannot directly extend outside to connect with the switchboard on the lifting platform, lacking a transitional support structure. In the existing solution, modifying the lifting platform or adding large lifting equipment would not only be costly and time-consuming, but would also damage the existing distribution room structure. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a method for transporting cabinets in confined spaces.

[0005] The technical solution adopted by this invention to solve its technical problem is: A method for transporting cabinets in a confined space includes the following steps: S1. Design and manufacture a transition platform, the height of which is adapted to the height difference between the second-floor hoisting platform and the power distribution room floor, and the bottom of the transition platform is equipped with casters; weld a hoisting device for suspending the hand chain hoist on the side of the electric hoist track near the power distribution room. S2. Place the cabinet directly below the ground hoisting hole and use an electric hoist to lift the cabinet to a height above the predetermined height of the hoisting platform. S3. Use an electric hoist to move the switchboard to the door of the power distribution room and lower it onto the pre-laid insulating mat; S4. Remove the electric hoist hook from the control panel, hang a manual hoist on the hoisting device, and connect the manual hoist hook to the top lifting point of the control panel. S5. Use a hand chain hoist to lift the switchboard to the same level as the floor of the power distribution room, move the transition platform under the switchboard, and move the forklift from inside the power distribution room to the transition platform, directly under the switchboard. S6. Slowly lower the switchgear using a hand chain hoist, allowing it to land smoothly on the forks of the pallet jack. Remove the hook from the hand chain hoist and use the pallet jack to move the switchgear to the temporary storage area in the power distribution room.

[0006] As a preferred embodiment, a further technical solution of the present invention is: Preferably, in step S2, the assistant moves the cabinet to directly below the ground hoisting hole, confirms that there are no debris under the cabinet, starts the electric hoist, and slowly lifts it at a speed of ≤0.3m / min until the bottom of the cabinet is 10cm higher than the second-floor hoisting platform. Then, the lifting is stopped to avoid the cabinet colliding with the edge of the hoisting hole.

[0007] Preferably, in S3, the electric hoist is activated to move the switchgear smoothly to the door of the power distribution room at a speed of ≤0.5m / min, and then slowly lowered onto the insulating mat. After confirming that the switchgear is placed securely, the electric hoist is released and the hook is removed, completing the initial transfer of a single switchgear.

[0008] Preferably, in step S4, the welding firmness of the hoisting device is checked; two hand chain hoists are respectively suspended on the hoisting device, and the hooks of the hand chain hoists are vertically connected to the lifting point on the top of the cabinet to ensure that the hooks are locked and prevent them from falling off.

[0009] Preferably, in S5, two operators simultaneously pull the chain of the hand-operated hoist at a speed of ≤0.1m / min to lift the cabinet until the bottom of the cabinet is level with the floor of the power distribution room. After pausing, they check the levelness of the cabinet to ensure there is no tilt. The operators push the transition platform to the connection between the hoisting platform and the power distribution room and lock the casters. The forklift is then pushed onto the transition platform, and the position of the forklift's forks is adjusted so that the forks are directly facing the load point at the bottom of the cabinet. The casters of the forklift are then locked.

[0010] Preferably, in S6, two operators simultaneously release the chain of the hand chain hoist at a speed of ≤0.1m / min to control the slow descent of the cabinet; after the bottom of the cabinet has fully contacted the forks of the forklift, continue to slowly lower the cabinet to ensure that the cabinet is evenly stressed on the forks; stop lowering after confirming that the cabinet is stable. Remove the hook from the chain hoist, push the forklift to transfer the switchboard from the transition platform to the temporary storage area in the power distribution room; reset the transition platform and chain hoist to prepare for the next switchboard.

[0011] Preferably, after all the switchboards have been transferred to the power distribution room, the switchboard positions are adjusted using crowbars and rollers in accordance with conventional methods to achieve precise placement.

[0012] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: Non-destructive and adaptable: No need to remove the windows / walls of the completed power distribution room. Utilize existing hoisting holes and platforms to accommodate the batch transfer of multiple switchboards, avoiding structural damage and repeated investment caused by traditional solutions; Visualization and Safety: Clearly define the operation of each step to reduce operational errors; the combination of simple hoisting device and transition platform solves the problems of height difference and connection; the synchronous operation of hand chain hoist ensures that the cabinet does not tilt and that there are zero safety accidents during transportation; Low cost and high efficiency: The simple hoisting device has zero material cost (on-site waste), saving on crane rental and window modification costs; it greatly shortens the construction period, balancing economy and efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the panel / cabinet being lifted from the ground mounting hole in an embodiment of the present invention; Figure 2 This is a schematic diagram of the edge translation and positioning of the cabinet hoisting platform in an embodiment of the present invention; Figure 3 This is a schematic diagram of the lifting device replacement in an embodiment of the present invention; Figure 4 This is a schematic diagram of the secondary lifting of the cabinet in an embodiment of the present invention; Figure 5 This is a schematic diagram of the forklift positioning in an embodiment of the present invention; Figure 6 This is a schematic diagram of the transfer-lifting tool dismantling in an embodiment of the present invention; Figure 7 This is a schematic diagram of the hoisting device in an embodiment of the present invention.

[0014] Explanation of reference numerals in the attached drawings: 1. Transition platform; 2. Lifting platform; 3. Power distribution room floor; 4. Electric hoist track; 5. Hand chain hoist; 6. Lifting device; 7. Panel cabinet; 8. Electric hoist. Detailed Implementation

[0015] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0016] This embodiment provides a method for transporting cabinets in a confined space, including the following steps: S1. Design and manufacture a transition platform 1. The height of the transition platform 1 is adapted to the height difference between the second-floor hoisting platform 2 and the ground of the power distribution room 3. The bottom of the transition platform 1 is equipped with casters. Weld a hoisting device 6 for suspending the hand chain hoist 5 on the side of the electric hoist track 4 near the power distribution room.

[0017] During implementation, simple hoisting devices such as Figure 7 As shown, it can be welded from on-site H-beam scrap and steel plate scrap (the steel plate has holes) and used to suspend two 3-ton hand chain hoists 5 to achieve secondary lifting of the control panel 7 to the elevation of the power distribution room.

[0018] Transition platform 1 is a metal platform with casters, which can be welded from on-site steel profiles and steel plates. It is used to connect hoisting platform 2 and the power distribution room, and to provide parking space for forklifts.

[0019] S2. Place the cabinet 7 directly below the ground hoisting hole, and use the electric hoist 8 to lift the cabinet 7 to a height higher than the predetermined height of the hoisting platform 2.

[0020] like Figure 1 As shown, a cabinet 7 is placed directly below the ground hoisting hole, and the electric hoist hook is lowered vertically to connect to the preset hoisting point on the top of the cabinet (the hoisting point is symmetrical with the center of gravity). Above the hoisting hole is the second-floor hoisting platform 2, and the electric hoist 8 is installed on the beam track of the platform.

[0021] In S2, the assistant personnel move the panel 7 directly below the ground hoisting hole, confirm that there are no debris under the panel, start the electric hoist 8, and slowly lift it at a speed of ≤0.3m / min until the bottom of the panel 7 is 10cm higher than the second-floor hoisting platform. Then, stop lifting to avoid the panel 7 colliding with the edge of the hoisting hole.

[0022] S3. Use electric hoist 8 to move the panel 7 to the door of the power distribution room and lower it onto the pre-laid insulating mat.

[0023] like Figure 2 As shown, panel 7 has been hoisted by electric hoist 8 to the second-floor hoisting platform 2, and then moved horizontally to the door of the power distribution room and landed on a 10 mm thick insulating mat that has been laid in advance.

[0024] In S3, start the electric hoist 8 to move the switchboard 7 smoothly to the door of the power distribution room at a speed of ≤0.5m / min, and slowly lower it onto the insulating mat; after confirming that the switchboard is placed securely, the electric hoist 8 releases the cable and removes the hook, completing the initial transfer of a single switchboard 7.

[0025] S4. Remove the electric hoist hook from the control panel 7, hang the hand chain hoist 5 on the hoisting device 6, and connect the hand chain hoist hook to the top lifting point of the control panel 7.

[0026] like Figure 3 As shown, the cabinet 7 is placed on the insulating mat at the edge of the hoisting platform, and the electric hoist hook has been removed; the simple hoisting device 6 (H-beam steel + perforated steel plate) is welded to the side of the electric hoist beam track 4 near the power distribution room, and two hand-operated hoists 5 are suspended from the holes in the steel plate, with their hooks connected to the symmetrical lifting points on the top of the cabinet.

[0027] In step S4, check the welding firmness of the hoisting device 6; suspend two hand chain hoists 5 on the hoisting device 6 respectively, and connect the hooks of the hand chain hoists 5 vertically to the top lifting point of the panel 7 to ensure that the hooks are locked and prevent them from falling off.

[0028] S5. Use the hand chain hoist 5 to lift the panel 7 to the same level as the floor 3 of the power distribution room. Move the transition platform 1 to the bottom of the panel 7. Move the forklift from the power distribution room to the transition platform 1, which is directly under the bottom of the panel 7.

[0029] like Figure 4 As shown, the hand chain hoist 5 has lifted the cabinet 7 to the bottom level with the floor of the power distribution room (overcoming the 1-meter total height difference). A transition platform 1 (with casters locked) is placed between the edge of the hoisting platform 2 and the door of the power distribution room. The pallet jack pushes the pallet jack from the power distribution room onto the transition platform 1, with the forklift forks facing directly below the bottom of the cabinet.

[0030] In S5, two operators simultaneously pull the chain of the hand-operated hoist at a speed of ≤0.1m / min to lift the cabinet until the bottom of the cabinet is level with the floor of the power distribution room. After pausing, they check the levelness of the cabinet to ensure there is no tilt. The operators then push the transition platform to the connection between the hoisting platform and the power distribution room and lock the casters. The forklift is then pushed onto the transition platform, and the position of the forklift's forks is adjusted so that the forks are directly facing the load-bearing point at the bottom of the cabinet. The casters of the forklift are then locked.

[0031] S6. Slowly lower the panel 7 using the hand chain hoist 5, so that the panel 7 lands smoothly on the forks of the pallet jack. Remove the hook of the hand chain hoist 5 and move the panel 7 to the temporary storage area in the power distribution room using the pallet jack.

[0032] like Figure 5 As shown, the manual chain hoist 5 slowly lowers the cabinet, and the cabinet is steadily lowered onto the forks of the forklift. The forklift position on the transition platform 1 is fixed, and the manual chain hoist 5 of the simple lifting device 6 is under stress. The interior of the power distribution room is visible.

[0033] In S6, two operators simultaneously release the chain of the hand chain hoist 5 at a speed of ≤0.1m / min to control the slow lowering of the panel cabinet 7; after the bottom of the panel cabinet 7 fully contacts the forks of the forklift, continue to slowly lower the panel cabinet 7 to ensure that the panel cabinet 7 is evenly stressed on the forks; after confirming that the panel cabinet 7 is stable, stop lowering. like Figure 6 As shown, panel 7 has been completely placed on the forklift forks, the hook of hand chain hoist 5 has been removed, and the forklift is being pushed from transition platform 1 to the designated temporary storage area in the power distribution room. The insulating pads on the edge of hoisting platform 2 are to be recycled (for later use in the power distribution room).

[0034] Remove the hook from the chain hoist 5, push the forklift to transfer the switchboard 7 from the transition platform 1 to the temporary storage area in the power distribution room; reset the transition platform 1 and the chain hoist 5, and prepare for the next switchboard 7 to be received.

[0035] After all the switchboards 7 have been transferred to the power distribution room, use crowbars and rollers to adjust the position of the switchboards using conventional methods to achieve precise placement.

[0036] This invention has been applied in the second phase of the electrical engineering project of an electric furnace in a metallurgical company in Hebei Province. It is necessary to transfer 51 high-voltage switchgear (each weighing 1.1 tons). The power distribution room has been completed (with windows closed). The hoisting platform is 1 meter lower than the indoor area, and the electric hoist can only lift 10 cm.

[0037] The traditional method requires removing two windows (16,000 yuan), renting a crane (60,000 yuan), and 10 people working for 12 days to complete the task; With this invention: The simple hoisting device was made from on-site scrap materials (zero cost) and installed in 1.5 hours. according to Figures 1-6 The visualized process operation allows for a team of 8 people working together (2 people to control the electric hoist, 2 people to control the manual hoist, 2 people to push the platform / forklift, and 2 people to assist), completing 10-11 units per day. The transfer of 51 units was completed in 5 days, with no scratches or tilting of the cabinets. The units passed inspection on the first attempt, saving more than 70,000 yuan in costs and shortening the construction period by 58%, which verified the practicality and innovation of the solution.

[0038] The solution provided by this invention is non-destructive and adaptable: it eliminates the need to remove completed power distribution room windows / walls, utilizes existing hoisting holes and platforms, and can accommodate the batch transfer of multiple cabinets, avoiding structural damage and repetitive investment caused by traditional solutions; it offers visualization and safety: it clarifies the operation of each step, reducing operational errors; the combination of a simple hoisting device and a transition platform solves the problems of height differences and connection, and the synchronous operation of the hand-operated hoist ensures that the cabinets do not tilt, resulting in zero safety accidents during transfer; it is low-cost and efficient: the simple hoisting device has zero material costs (on-site waste), saving on crane rental and window modification costs; it greatly shortens the construction period, balancing economy and efficiency.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for transporting cabinets in a narrow space, characterized in that, The method comprises the following steps: S1. Design and make a transition platform, the height of which is adapted to the height difference between the second floor hoisting platform and the ground of the power distribution room, and the bottom of the transition platform is provided with universal wheels; a hoisting device for hanging the hand-operated hoist is welded on one side of the electric hoist track close to the power distribution room; S2. Place the disc cabinet directly below the ground hoisting hole, and use the electric hoist to hoist the disc cabinet to a predetermined height above the hoisting platform; S3. Move the disc cabinet to the door of the power distribution room by the electric hoist and place it on the pre-laid insulating pad; S4. Remove the electric hoist hook from the disc cabinet, hang the hand-operated hoist on the hoisting device, and connect the hand-operated hoist hook to the top hoisting point of the disc cabinet; S5. Lift the disc cabinet to the level of the ground of the power distribution room by the hand-operated hoist, move the transition platform to the bottom of the disc cabinet, and move the forklift to the transition platform from the power distribution room; S6. Slowly lower the disc cabinet by the hand-operated hoist, and place it stably on the forks of the forklift, remove the hand-operated hoist hook, and move the disc cabinet to the temporary storage area in the power distribution room by the forklift.

2. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein, In S2, the auxiliary personnel move the disc cabinet directly below the ground hoisting hole, confirm that the bottom of the cabinet is free of debris, start the electric hoist, and slowly hoist it at a speed of ≤0.3 m / min until the bottom of the disc cabinet is 10 cm higher than the second floor hoisting platform, and then pause the hoisting to avoid collision between the disc cabinet and the edge of the hoisting hole.

3. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein, In S3, start the electric hoist, move the disc cabinet to the door of the power distribution room at a speed of ≤0.5 m / min, and slowly place it on the insulating pad; after confirming that the disc cabinet is stably placed, loosen the cable of the electric hoist and remove the hook, and complete the preliminary transfer of a single disc cabinet.

4. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein, In S4, check the welding firmness of the hoisting device; hang two hand-operated hoists on the hoisting device, and vertically connect the hooks of the hand-operated hoists to the top hoisting point of the disc cabinet to ensure that the hooks are tightly clamped and do not fall off.

5. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein, In S5, two workers simultaneously pull the chain of the hand-operated hoist at a speed of ≤0.1 m / min, lift the disc cabinet to the level of the ground in the power distribution room, pause, and check the levelness of the disc cabinet to ensure that it is not tilted; the workers push the transition platform to the junction of the hoisting platform and the power distribution room, lock the universal wheels; the forklift is pushed onto the transition platform, the position of the forks of the forklift is adjusted so that the forks are opposite the force point at the bottom of the cabinet, and the universal wheels of the forklift are locked.

6. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein, In S6, two workers simultaneously loosen the chain of the hand-operated hoist at a speed of ≤0.1 m / min, and control the slow lowering of the disc cabinet; after the bottom of the disc cabinet completely contacts the forks of the forklift, continue to slowly lower the height of the disc cabinet to ensure that the disc cabinet is evenly stressed on the forks; after confirming that the disc cabinet is stably placed, stop lowering it; Remove the hook of the hand-operated hoist, push the forklift, and transfer the disc cabinet from the transition platform to the temporary storage area in the power distribution room; reset the transition platform and the hand-operated hoist, and prepare for the reception of the next disc cabinet.

7. The method of transporting a disc cabinet within a narrow space according to claim 1, wherein After all the disc cabinets are transferred to the power distribution room, use a crowbar and a rolling lever to adjust the position of the disc cabinet according to the conventional method, and complete the precise positioning.

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