Modularized hoisting and introducing method for large condenser

Abstract

The invention discloses a modular hoisting introduction method for a large condenser. The modular hoisting introduction method comprises the following steps: S1, preprocessing a condenser module and planning a path; s2, pre-condition verification before hoisting is carried out, and installation supervision inspection reports of a civil engineering slow construction structure, a main traveling crane and an auxiliary traveling crane in a hoisting area and the qualification of special operating personnel are inspected; s3, single-machine trial hoisting and leveling are conducted, a first hoisting beam and a first hoisting belt are connected through a main traveling crane, the condenser module placed on the bracket and the bracket are hoisted to the position, 100-200 mm higher than the conveying device, of the bottom, standing is conducted for 10 minutes, and the stress condition of a hoisting sling and the deformation condition of the condenser module are monitored; and S4, double cranes are cooperatively hoisted and introduced step by step, and the condenser module located on the 0-meter layer on the left side of the factory building frame beam is hoisted rightwards and introduced into the-7.15 m installation position. The main travelling crane and the auxiliary travelling crane are matched, modular hoisting and introduction of the condenser are carried out step by step, an obstacle frame beam is ingeniously bypassed, and the problem that the large condenser is difficult to hoist and introduce in a narrow space is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large equipment installation of the conventional island of a nuclear power plant, and particularly relates to a modular hoisting and leading-in method for a large condenser. BACKGROUND

[0002] The large condenser is a core equipment of the conventional island of a nuclear power plant, and has the characteristics of large size and large weight. The equipment needs to be lifted by double cranes during hoisting, and the space for positioning is narrow. In particular, the existence of the hoisting area civil construction slow structure results in great difficulty in leading in the equipment, long construction duration, and the need for climbing operation and edge operation during construction.

[0003] Therefore, the present application solves the above technical problems through modular step-by-step hoisting, coordinated posture adjustment of double cranes, and dynamic safety monitoring. SUMMARY

[0004] The present application aims to provide a modular hoisting and leading-in method for a large condenser, which solves the above technical problems through coordinated posture adjustment of double cranes.

[0005] In order to solve the above technical problems, the present application realizes the following scheme: A modular hoisting and leading-in method for a large condenser, comprising the following steps: Step S1: Condenser module pretreatment and path planning: according to the size parameters and weight of the condenser module, the transportation path and the parking position in the plant are designed, and the direction reference line of the condenser module is marked at the 0-meter layer in the plant.

[0006] Step S2: Verification of preconditions before hoisting: check the installation supervision inspection report of the hoisting area civil construction slow structure, the main and auxiliary traveling cranes, and the qualifications of special operation personnel, confirm the quality certificate of the hoisting rigging and the quarterly inspection label.

[0007] Step S3: Single crane trial hoisting and leveling: the main traveling crane is connected with the first hoisting beam and the first hoisting belt, the condenser module placed on the bracket is lifted together with the bracket to a height of 100-200mm higher than the transportation device, the connection point of the first hoisting beam is adjusted to ensure that the horizontal error of the condenser module is less than or equal to 5°, and the condenser module is left to stand for 10 minutes, and the stress of the hoisting rigging and the deformation of the condenser module are monitored.

[0008] Step S4: Double-crane coordinated step-by-step hoisting and leading-in: the condenser module at the 0-meter layer on the left side of the frame beam of the civil construction slow structure is hoisted and led in to the installation position-7.15m to the right.

[0009] The initial position of the condenser module is at the 0-meter layer on the left side of the structural frame beam of the building, the distance between the frame beam and other structures on the left side of the frame beam is less than the length of the condenser module, and the installation height of the travelling crane is higher than the frame beam, so the condenser module cannot be directly lifted by the travelling crane to cross the frame beam, and thus the condenser module needs to be lifted by the main travelling crane and the auxiliary travelling crane in cooperation and in steps.

[0010] Further optimization, two groups of lifting lug assemblies are arranged on the bracket along the length direction of the bracket, and the two groups of lifting lug assemblies are symmetrically arranged about the vertical line of the length direction of the bracket; each group of lifting lug assemblies comprises two lifting lug plates, the two lifting lug plates are located on the two sides of the bracket and are rotationally connected to the bracket through a rotating shaft, and each lifting lug plate is provided with two connecting holes for connecting lifting belts.

[0011] Further optimization, the step S4 comprises the following steps: Step S4.1: controlling the main travelling crane to run above the current position of the condenser module, the hook of the main travelling crane being connected to the first lifting beam through a lifting cable, and the first lifting beam being connected to the bracket through four first lifting belts; four connecting columns are arranged on the first lifting beam, the upper end of each first lifting belt is connected to one of the connecting columns of the first lifting beam, and the lower end is connected to one of the lifting lug plates on the corresponding side through a connecting hole; wherein the lower ends of the two first lifting belts on the right end are respectively connected to the left connecting holes of the corresponding lifting lug plates.

[0012] Firstly, the main travelling crane is controlled to lift the condenser module together with the bracket and translate to the right, so that the first lifting beam and the lifting cable are close to the left side of the frame beam; then the condenser module together with the bracket is lowered to the 0-meter layer; at this time, the left part of the condenser module and the bracket is placed on the preset sleeper, the right half is suspended, is located above the installation position of the condenser module, the center of gravity of the condenser module is located on the left side of the frame beam, the lifting cable of the main travelling crane is not unhooked from the first lifting belt of the condenser module, and is still in a stressed and tensioned state; at this time, the left group of lifting lug assemblies on the bracket is located on the left side of the frame beam, and the right group of lifting lug assemblies on the bracket is located on the right side of the frame beam.

[0013] Step S4.2: firstly, the auxiliary travelling crane is controlled to run, so that the second lifting beam connected to the hook of the auxiliary travelling crane is located on the right side of the frame beam, and then the auxiliary travelling crane is lowered and parked.

[0014] Then, the operator connects the two lifting lug plates on the right side of the bracket to the second lifting beam through two second lifting belts, and the lower end of the second lifting belt is connected to the right connecting hole of the corresponding lifting lug plate.

[0015] Then, the auxiliary travelling crane is controlled to run to drive the second lifting beam to be lifted upward, so that the second lifting belt is in a stressed and tensioned state, but at this time the left part of the condenser module and the bracket is still placed on the preset sleeper.

[0016] Finally, the operator disconnects the upper ends of the two first slings on the right side from the first hoisting beam, so that the first hoisting beam is connected to the two lifting lug plates on the left side of the bracket only through the two first slings on the left side.

[0017] Step S4.3: First, control the main trolley to drive the first hoisting beam to descend, so that the first slings are in a slack state, and then drive the first hoisting beam to move to the left until the first hoisting beam is above the two lifting lug plates on the left side.

[0018] Then, control the main trolley to drive the first hoisting beam to ascend, so that the first slings are in a stressed and taut state.

[0019] Finally, control the main trolley and the auxiliary trolley to operate synchronously, first ascend to lift the condenser module and the bracket away from the 0-meter layer, then operate synchronously to the right until the first hoisting beam and the sling are again in close contact with the left side of the frame beam, and then the main trolley and the auxiliary trolley descend synchronously, so that the condenser module together with the bracket is lowered to the 0-meter layer; at this time, the left end of the condenser module and the bracket is placed on the preset sleeper, the right half is suspended, is located above the condenser module installation position, the center of gravity of the condenser module is located on the right side of the frame beam, and the left group of lifting lug assemblies on the bracket is located below the frame beam.

[0020] Step S4.4: First, keep the second hoisting beam of the auxiliary trolley not disconnected from the second slings of the condenser module, and still in a stressed and taut state.

[0021] Then, the operator disconnects the upper ends of the two first slings on the left side from the first hoisting beam, so that the main trolley is not connected to the condenser module and the bracket.

[0022] Then, control the main trolley to operate, drive the first hoisting beam to ascend first, then move to the right, and finally descend, so that it passes over the frame beam and is operated above the center of gravity position of the condenser module, and then stop.

[0023] Then, the operator reconnects the upper ends of the four first slings to the first hoisting beam, so that the upper end of each first sling is connected to one connection of the first hoisting beam, and the lower end is connected to one lifting lug plate on the corresponding side through the connection hole; then control the main trolley to drive the first hoisting beam to ascend, so that the first slings are in a stressed and taut state, but the left end of the condenser module and the bracket is placed on the preset sleeper; then the operator disconnects the second slings from the second hoisting beam, so that the auxiliary trolley is not connected to the condenser module and the bracket.

[0024] Finally, control the auxiliary trolley to operate, so that the lifting device and the second hoisting beam of the auxiliary trolley are away from the main trolley; then control the main trolley to individually hoist the condenser module together with the bracket, and translate to above the installation position, and then descend to the in-place elevation of -7.15 m, and fine-tune the positioning through the weight shifter, and thus the hoisting introduction ends.

[0025] Further optimization, the size parameters of the condenser module are: length 19600mm* width 5320mm* height 5760mm, and the weight is 220t; the frame beam is located at 17.5m.

[0026] Further optimization, the main travelling crane rated load is 400t, and the auxiliary travelling crane rated load is 160t.

[0027] Further optimization, in the step S4.4, when the second lifting beam of the auxiliary travelling crane is not disengaged from the second lifting belt of the condenser module and is still in the stressed and tensioned state, the upper end of the two first lifting belts on the left side is disengaged from the first lifting beam, and at this time, the load of the auxiliary travelling crane satisfies T1*L1=(total weight of the condenser module and the bracket-T1)*L2. Wherein, T1 is the 0-meter floor bearing capacity, L1 is the distance from the 0-meter floor support point to the center of gravity of the condenser module, and L2 is the distance from the lifting point of the auxiliary travelling crane to the center of gravity of the condenser module.

[0028] Compared with the prior art, the beneficial effects of the present application are: The present application ingeniously bypasses the obstacle frame beam by adopting the cooperation of the main travelling crane and the auxiliary travelling crane to perform the modular hoisting and introduction of the condenser, thereby solving the problem that the large condenser is difficult to hoist and introduce in a small space. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The flow chart of the large condenser modular hoisting and introduction method of the present application; Figure 2 The large condenser modular hoisting and introduction process of the present application Figure One ; Figure 3 The large condenser modular hoisting and introduction process of the present application Figure Two ; Figure 4 The large condenser modular hoisting and introduction process of the present application Figure Three ; Figure 5 The large condenser modular hoisting and introduction process of the present application Figure Four ; Figure 6 The large condenser modular hoisting and introduction process of the present application Figure Five ; Figure 7 The large condenser modular hoisting and introduction process of the present application Figure Six ; Figure 8 The large condenser modular hoisting and introduction process of the present application Figure Seven ; Figure 9 This is a schematic diagram of the modular hoisting process for the large condenser described in this invention. Figure Eight . Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the embodiments, but the scope of protection of the present invention is not limited to the embodiments described.

[0031] like Figure 1 As shown, a modular hoisting and installation method for a large condenser includes the following steps: Step S1: Condenser module preprocessing and path planning: Based on the size parameters and weight of the condenser module, design the transportation route and parking location in the plant, and mark the directional baseline of the condenser module at the 0-meter level in the plant.

[0032] In this embodiment, the dimensions of the condenser module are: length 19600mm × width 5320mm × height 5760mm, and weight 220t; the frame beam is located at 17.5m.

[0033] Step S2: Verification of prerequisites before hoisting: Check the installation supervision and inspection reports of the civil engineering delayed structure in the hoisting area, the main gantry crane and the auxiliary gantry crane, and the qualifications of special operation personnel; confirm the quality certification documents and quarterly inspection labels of the slings and rigging.

[0034] Step S3: Single-machine trial lifting and leveling: Using the main trolley connected to the first lifting beam and the first lifting strap, lift the condenser module placed on the bracket, along with the bracket, to a height of 100-200mm above the transport device. Adjust the connection point of the first lifting beam to ensure that the horizontal error of the condenser module is ≤5°, and let it stand for 10 minutes to monitor the stress on the lifting slings and the deformation of the condenser module. If there are no broken wires in the slings, no deformation of the lifting lugs, and the trolley brakes are reliable, repeatedly lift / lower to test the brake sensitivity to confirm that there are no abnormalities.

[0035] The bracket is provided with two sets of lifting lug assemblies along its length, and the two sets of lifting lug assemblies are symmetrically arranged about the perpendicular bisector of the length direction of the bracket; each set of lifting lug assemblies includes two lifting lug plates 4, which are located on both sides of the bracket and are rotatably connected to the bracket through a pivot, and each lifting lug plate is provided with two connecting holes for connecting lifting straps.

[0036] In this embodiment, the rated load of the main gantry crane 1 is 400t, and the rated load of the auxiliary gantry crane 8 is 160t.

[0037] The main hook of the main trolley 2 is connected to two 100t×9.6m slings (double strand), which are connected to both ends (points A and B) of the 280t first lifting beam through 200t shackles; the lower part of the first lifting beam is connected to four 50t×23m first slings 3 (double strand) with 150t shackles, and the lower end of the first sling is connected to the lifting lug plate. The slings are pre-tightened to ensure uniform force distribution.

[0038] Step S4: The condenser module 1, located on the left side of the structural frame beam at level 6 (0m), is hoisted to the right and introduced to installation position 7 at -7.15m. Load factor control: main t ≤ 61.75%, auxiliary t ≤ 85%. Step S4 includes the following steps: Step S4.1: Control the main trolley 2 to move above the current position of the condenser module 1. The hook of the main trolley is connected to the first lifting beam via a sling. The first lifting beam is connected to the bracket via four first lifting straps. Four connecting columns are installed on the first lifting beam. The upper end of each first lifting strap 3 is connected to a connection point on the first lifting beam, and the lower end is connected to a corresponding lifting lug plate via a connecting hole. Figure 2 As shown; wherein, the lower ends of the two first slings located at the right end are respectively connected to the left connecting holes of the corresponding lifting lugs.

[0039] First, the main trolley 2 is controlled to lift the condenser module 1 along with its bracket and move it horizontally to the right, so that the first lifting beam and slings are close to the left side of the frame beam 5; then the condenser module along with its bracket is lowered to the 0-meter level; at this time, the left side of the condenser module and bracket rests on the pre-set sleepers, and the right half is suspended above the condenser module's installation position. The center of gravity of the condenser module is located on the left side of the frame beam, and the slings of the main trolley are not disengaged from the first lifting strap of the condenser module and remain under tension; at this time, a set of lifting lugs on the left side of the bracket is located on the left side of the frame beam, and a set of lifting lugs on the right side of the bracket is located on the right side of the frame beam, as shown below. Figure 3 As shown.

[0040] Step S4.2: First, control the auxiliary trolley 8 to move, so that the second lifting beam connected to its hook is located on the right side of the frame beam, then lower and stop; then, the operator connects the two lifting lugs on the right side of the bracket to the second lifting beam using two second lifting straps 9, with the lower end of the second lifting straps connected to the right-side connecting holes of the corresponding lifting lugs; then, control the auxiliary trolley to move and lift the second lifting beam upward, so that the second lifting straps are under tension, but at this time the left side of the condenser module and the bracket is still resting on the pre-set sleepers, as... Figure 4 As shown.

[0041] Finally, the operator detaches the upper ends of the two first slings on the right side from the first lifting beam, meaning that at this point the first lifting beam is only connected to the two lifting lugs on the left side of the bracket via the two first slings on the left side.

[0042] Step S4.3: First, control the main trolley to move the first lifting beam down, so that the first sling is in a slack state. Then, move the first lifting beam to the left until it is above the two left-side lifting lugs. Then, control the main trolley to move the first lifting beam up, so that the first sling is under tension.

[0043] Finally, control the main and auxiliary trolleys to operate synchronously, with the difference in lifting / traveling speed between the two ≤0.5m / min. First, lift the condenser module and bracket away from the 0-meter level; then move synchronously to the right until the first lifting beam and slings are close to the left side of the frame beam again; then the main and auxiliary trolleys descend synchronously, lowering the condenser module along with the bracket to the 0-meter level; at this point, the left end of the condenser module and bracket rests on the pre-set sleepers, the right half is suspended above the condenser module's installation position, the center of gravity of the condenser module is located on the right side of the frame beam, and a set of lifting lugs on the left side of the bracket is located below the frame beam, as shown below. Figure 5 As shown.

[0044] Step S4.4: First, keep the second lifting beam of the auxiliary trolley from disengaging from the second lifting strap of the condenser module, ensuring they remain under tension and strain. Then, the operator detaches the upper ends of the two first lifting straps on the left from the first lifting beam. At this point, the main trolley is not connected to the condenser module and bracket. Figure 6 As shown. At this time, the load of the auxiliary trolley satisfies: T1×L1=(total weight of condenser module and bracket - T1)×L2; where T1 is the bearing capacity of the 0-meter floor, L1 is the distance from the support point of the 0-meter floor to the center of gravity of the condenser module, and L2 is the distance from the lifting point of the auxiliary trolley to the center of gravity of the condenser module.

[0045] Then, control the main trolley to move, causing the first lifting beam to rise, then move to the right and finally descend, so that it passes over the frame beam and moves to above the center of gravity of the condenser module, and then stops.

[0046] Next, the operator reconnects the upper ends of the four first lifting straps to the first lifting beam. At this point, the upper end of each first lifting strap is connected to a joint on the first lifting beam, and the lower end is connected to a corresponding lifting lug plate through a connecting hole. Then, the main trolley is controlled to raise the first lifting beam, so that the first lifting straps are under tension. However, the left end of the condenser module and bracket rests on the pre-set sleepers. Figure 7 As shown. Then the operator detaches the second hoisting strap from the second hoisting beam. At this point, the auxiliary trolley is not connected to the condenser module and bracket.

[0047] Finally, control the auxiliary trolley to move its lifting gear and second lifting beam away from the main trolley; then control the main trolley to lift the condenser module along with its support frame separately and move it horizontally above its installation position, such as... Figure 8As shown, it is then lowered to the -7.15m positioning elevation, and fine-tuned in position using a weight shifter. This completes the hoisting and introduction of the condenser module. Figure 9 As shown, the clever bypass of the obstacle frame beams solves the problem of the difficulty in hoisting and introducing large condensers into confined spaces.

[0048] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for modularly hoisting and introducing a large condenser, characterized in that, Includes the following steps: Step S1: Condenser module preprocessing and path planning: Based on the size parameters and weight of the condenser module, design the transportation route and parking location in the plant, and mark the directional baseline of the condenser module at the 0-meter level in the plant. Step S2: Verification of prerequisites before hoisting: Check the installation supervision and inspection reports of the delayed civil engineering structure in the hoisting area, the main gantry crane and the auxiliary gantry crane, and the qualifications of special operation personnel; confirm the quality certification documents and quarterly inspection labels of the slings and rigging. Step S3: Single-machine trial lifting and leveling: Using the main trolley to connect the first lifting beam and the first lifting strap, lift the condenser module placed on the bracket along with the bracket to the bottom 100-200mm higher than the transport device. Adjust the connection point of the first lifting beam to ensure that the horizontal error of the condenser module is ≤5°, and let it stand for 10 minutes to monitor the stress on the lifting slings and the deformation of the condenser module. Step S4: The condenser module located on the left side of the frame beam of the plant is hoisted to the right and introduced into the installation position at -7.15m using a dual-crane coordinated step-by-step hoisting method.

2. The modular hoisting and introduction method for large condensers according to claim 1, characterized in that, The bracket is provided with two sets of lifting lug assemblies along its length, and the two sets of lifting lug assemblies are symmetrically arranged about the perpendicular bisector of the bracket's length direction; each set of lifting lug assemblies includes two lifting lug plates, which are located on both sides of the bracket and are rotatably connected to the bracket via a pivot, and each lifting lug plate is provided with two connecting holes for connecting lifting straps.

3. The modular hoisting and introduction method for large condensers according to claim 2, characterized in that, Step S4 includes the following steps: Step S4.1: Control the main trolley to move above the current position of the condenser module. The hook of the main trolley is connected to the first lifting beam via a sling. The first lifting beam is connected to the bracket via four first lifting straps. The first lifting beam is equipped with four connecting columns. The upper end of each first lifting strap is connected to a connection point of the first lifting beam, and the lower end is connected to a lifting lug plate on the corresponding side via a connecting hole. Among them, the lower ends of the two first lifting straps located on the right end are connected to the left connecting holes of the corresponding lifting lug plates. First, the main trolley is controlled to lift the condenser module along with the bracket and move it to the right, so that the first lifting beam and sling are close to the left side of the frame beam. Then, the condenser module along with the bracket is lowered to the 0-meter level. At this time, the left side of the condenser module and the bracket rests on the pre-set sleepers, and the right half is suspended in the air above the installation position of the condenser module. The center of gravity of the condenser module is located on the left side of the frame beam. The sling of the main trolley is not disengaged from the first lifting strap of the condenser module and is still under tension. At this time, a set of lifting lugs on the left side of the bracket is located on the left side of the frame beam, and a set of lifting lugs on the right side of the bracket is located on the right side of the frame beam. Step S4.2: First, control the auxiliary trolley to move so that the second lifting beam connected to its hook is located on the right side of the frame beam, then lower it and stop; Then, the operator connects the two lifting lugs on the right side of the bracket to the second lifting beam using two second lifting straps, with the lower end of the second lifting straps connected to the right-side connecting hole of the corresponding lifting lug. Then, the auxiliary trolley is controlled to move and lift the second lifting beam upward, so that the second lifting belt is under tension. However, at this time, the left side of the condenser module and bracket is still resting on the preset sleepers. Finally, the operator detaches the upper ends of the two first slings on the right side from the first lifting beam, meaning that at this point the first lifting beam is only connected to the two lifting lugs on the left side of the bracket via the two first slings on the left side. Step S4.3: First, control the main trolley to move, causing the first lifting beam to descend, so that the first lifting belt is in a slack state, and then move the first lifting beam to the left until the first lifting beam is above the two left-side lifting lugs; Then, control the main trolley to drive the first lifting beam to rise, so that the first lifting belt is under stress and tension; Finally, the main and auxiliary trolleys are controlled to run synchronously. First, they rise to lift the condenser module and bracket off the 0-meter level. Then, they move synchronously to the right until the first lifting beam and slings are close to the left side of the frame beam again. Then, the main and auxiliary trolleys descend synchronously to lower the condenser module and bracket to the 0-meter level. At this time, the left end of the condenser module and bracket rests on the pre-set sleeper, and the right half is suspended in the air above the condenser module installation position. The center of gravity of the condenser module is located on the right side of the frame beam, and a set of lifting lugs on the left side of the bracket is located below the frame beam. Step S4.4: First, keep the second lifting beam of the auxiliary crane from disengaging from the second lifting strap of the condenser module, and keep them under tension and strain. Then, the operator detaches the upper ends of the two first lifting straps on the left from the first lifting beam. At this point, the main trolley is not connected to the condenser module and bracket. Then, control the main trolley to move, causing the first lifting beam to rise, then move to the right and finally descend, so that it passes over the frame beam and moves to above the center of gravity of the condenser module, and then stops. Next, the operator reconnects the upper ends of the four first lifting straps to the first lifting beam. At this point, the upper end of each first lifting strap is connected to a connection point on the first lifting beam, and the lower end is connected to a lifting lug plate on the corresponding side through a connecting hole. Then, the main trolley is controlled to drive the first lifting beam upward, so that the first lifting straps are under tension, but the left end of the condenser module and bracket rests on the pre-set sleepers. Then, the operator disconnects the second lifting strap from the second lifting beam. At this point, the auxiliary trolley is not connected to the condenser module and bracket. Finally, control the auxiliary trolley to move its lifting gear and second lifting beam away from the main trolley; then control the main trolley to lift the condenser module along with the bracket separately, and move it horizontally above the installation position, and then lower it to the -7.15m positioning elevation. Fine-tune the positioning using the weight shifter, and the lifting and installation is now complete.

4. The modular hoisting and introduction method for large condensers according to claim 3, characterized in that, The condenser module has the following dimensions: length 19600mm × width 5320mm × height 5760mm, and a weight of 220t; the frame beam is located at 17.5m.

5. The modular hoisting and introduction method for large condensers according to claim 4, characterized in that, The rated load of the main gantry crane is 400t, and the rated load of the auxiliary gantry crane is 160t.

6. The modular hoisting and introduction method for large condensers according to claim 5, characterized in that, In step S4.4, while keeping the second lifting beam of the auxiliary trolley from the second lifting strap of the condenser module in a state of tension and stress, the operator then disconnects the upper ends of the two first lifting straps on the left from the first lifting beam. At this time, the load of the auxiliary trolley satisfies: T1×L1=(total weight of condenser module and bracket - T1)×L2. Where T1 is the load-bearing capacity of the 0-meter floor, L1 is the distance from the support point of the 0-meter floor to the center of gravity of the condenser module, and L2 is the distance from the auxiliary trolley hoisting point to the center of gravity of the condenser module.

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