Transformation method, lowering device and lowering method based on air shaft

Abstract

The invention provides a transformation method, a lowering device and a lowering method based on an air shaft, and relates to the field of constructional engineering construction.By transforming head sheaves, guide wheels and steaders left in the air shaft and adjusting the positions of the head sheaves, the guide wheels and the steaders, the head sheaves, the guide wheels and the steaders meet the hoisting requirement of large equipment, the equipment left in the air shaft is fully utilized, and the hoisting efficiency is improved. The end face of the air shaft is large, so that the air shaft has the effect of lowering large-scale equipment, the disassembly degree of the large-scale equipment is reduced, the difficulty of assembling at the shaft bottom in the later period is avoided, in addition, the structure of the round girder is optimized, self-balance can be achieved when the round girder inclines slightly, and the service life of the round girder is prolonged. And the situation that large-scale equipment is collided in the lowering process and breakage occurs due to the fact that part of steel wire loads are exceeded is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction engineering, in particular to a reconstruction method based on a ventilation shaft, a lowering device and a lowering method. BACKGROUND

[0002] In the field of underground mine construction, more and more large equipment is used for underground construction, typical large equipment such as TBM, TBM equipment in underground construction, tunneling speed, section forming is good, construction safety is high, technology is mature. However, such large equipment has a large volume, which needs to be lowered to the underground before use. The existing large equipment is often lowered through the auxiliary shaft, which needs to occupy the auxiliary shaft for a long time, so that other personnel and equipment cannot pass through the auxiliary shaft to enter and exit the underground, which slows down the mine construction process, in addition, the ventilation shaft is left with a derrick, a crown block set on the derrick, a guide wheel and a large number of car stabilizers at the wellhead during construction. These remaining equipment will be removed after completion, causing a lot of waste of financial and material resources.

[0003] Based on the above disadvantages, the present application is based on the equipment left over during the construction of the ventilation shaft, and the ventilation shaft is reconstructed for lowering large equipment. SUMMARY

[0004] The present application provides a reconstruction method based on a ventilation shaft, a lowering device and a lowering method, which aims to make full use of the equipment left over during the construction of the ventilation shaft, form a channel and device for lowering large equipment, and avoid the long occupation and waste of financial and material resources caused by lowering equipment through the auxiliary shaft.

[0005] In order to achieve the above purpose, the embodiment of the present application provides a reconstruction method based on a ventilation shaft, comprising: S10. Determine the position of the movable pulley set based on the length of the meta-beam, the movable pulley set is provided with 2 groups, each group includes a movable pulley for hoisting the meta-beam and a lowering crown block arranged on both sides of the movable pulley, part of the crown blocks on the derrick are used as the lowering crown block, the distance between the two movable pulleys is determined based on the length of the meta-beam, the lateral distance between the two lowering crown blocks in each movable pulley set is adjusted based on the diameter of the movable pulley groove, the same number of car stabilizers as the number of lowering crown blocks are selected as the lowering car stabilizers for pulling the movable pulley to rise and fall, and the lowering car stabilizers and the lowering crown blocks are aligned one by one in the transverse direction; S20. Determine the position of the first stable rope crown block based on the length of the meta-beam, select part of the crown blocks as the first stable rope crown block, adjust the position of the first stable rope crown block in the lateral direction of the derrick and make the distance between them greater than the length of the meta-beam, select part of the car stabilizers as the first stable rope car stabilizer, and the first stable rope car stabilizer and the first stable rope crown block are aligned one by one in the transverse direction; S30. Lay a lowering platform at the wellhead, and lay a track arranged in the lateral direction and a lateral traction mechanism arranged at the end of the track on the lowering platform; S40. In the same group of movable pulley sets, the movable pulley set has a lowering steel wire, one end of the lowering steel wire is connected with the winch of one of the lowering stable vehicles, and the other end is sequentially connected with the winch of the other lowering stable vehicle after passing through the lowering sheave, the movable pulley and the other lowering sheave; The winch of the first stable rope stable vehicle is connected with a first stable rope steel wire, and the other end of the first stable rope steel wire is fixed to the bottom of the well after passing through the first stable rope sheave; S50. The yuanbao beam is suspended on the movable pulley shaft of each movable pulley set.

[0006] Preferably, in steps S10 and S20, the guide wheels on the derrick are also selected as the lowering guide wheels and the first stable rope guide wheels, and the positions of the lowering guide wheels and the first stable rope guide wheels are adjusted so that the lowering guide wheels and the first stable rope guide wheels are located on the movement paths of the lowering steel wire and the first stable rope steel wire.

[0007] Preferably, in step S10, the distance between the two lowering sheaves in each group of movable pulley sets is equal to the diameter of the groove of the movable pulley.

[0008] Preferably, the distance between the first stable rope steel wire and the large-scale equipment being hoisted is greater than a preset distance.

[0009] Preferably, the yuanbao beam is a frame, two fixed pulleys are arranged in the frame in the lateral direction, and a hoisting steel wire for hoisting the large-scale equipment is connected to the lower end of the frame. The movable pulley shaft is clearance-fitted with hoisting supports, and the lower end of one of the hoisting supports is provided with a connecting steel wire, and the other end of the connecting steel wire is connected with the other hoisting support after passing through the two fixed pulleys.

[0010] Preferably, at least an assembly chamber is excavated at the bottom of the well for assembling the equipment.

[0011] The application also provides a modified lowering device, which is obtained by using the above-mentioned modification method based on the wind well, and further comprises: A bucket assembly, which comprises a bucket stable vehicle, a bucket steel wire, a bucket and a bucket sheave, part of the stable vehicles is selected as the bucket stable vehicle, part of the sheaves is selected as the bucket sheave, one end of the bucket steel wire is connected with the bucket stable vehicle, and the other end is connected with the bucket after passing through the bucket sheave.

[0012] Preferably, the lowering device further comprises a second stable rope sheave and a second stable rope stable vehicle, part of the sheaves and stable vehicles is selected as the second stable rope sheave and the second stable rope stable vehicle, the winch of the second stable rope stable vehicle is connected with a second stable rope steel wire, and the second stable rope steel wire is fixed to the bottom of the well after passing through the second stable rope sheave; The two second stable rope sheaves are located between the two bucket sheaves in the lateral direction.

[0013] The application further provides a lowering method using the lowering device, and the method comprises the following steps: S10. The large equipment is disassembled so that the disassembled parts are smaller than the well mouth; S20. The parts are dragged to the well mouth by the lateral traction mechanism and connected with the treasure beam; S30. The parts are hoisted by the lowering stabilizer, and the lateral traction mechanism pulls the parts to offset the lateral pulling force during the hoisting process; S40. The lowering stabilizer releases the cable, and the parts are lowered to the bottom of the well; S50. The disassembled parts are assembled at the bottom of the well.

[0014] The above scheme of the application has the following beneficial effects: 1. The equipment left in the air shaft is modified, so that the equipment left in the air shaft is fully utilized, the air shaft end face is large, the air shaft has the function of lowering the large equipment, the disassembly degree of the large equipment is reduced, and the difficulty of assembly at the bottom of the well in the later period is avoided.

[0015] 2. The large equipment is lowered by using the air shaft, and the influence of the personnel and other equipment of the mine on the access through the auxiliary shaft is also avoided.

[0016] Other features and advantages of the application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a top view of the air shaft and each stabilizer; Figure 2 is a top view of each sheave and guide wheel; Figure 3 is a schematic view of the moving pulley and the treasure beam; Figure 4 is a top view of the lowering platform; Figure 5 is a front view of the bucket and the treasure beam; Figure 6 is a schematic view of the lowering of the large equipment; Figure 7 is a schematic view of the bottom chamber of the well.

[0018]

Explanation of reference signs

[0019] 1-king beam, 2-movable pulley, 3-lowering head sheave, 4-lowering stable car, 5-first stable rope head sheave, 6-first stable rope stable car, 7-lowering platform, 8-rail, 9-lateral traction mechanism, 10-lowering steel wire, 11-first stable rope steel wire, 12-lowering guide pulley, 13-first stable rope guide pulley, 14-fixed pulley, 15-lifting steel wire, 16-lifting support, 17-connection steel wire, 18-assembled chamber, 19-hoisting bucket stable car, 20-hoisting bucket steel wire, 21-hoisting bucket, 22-hoisting bucket head sheave, 23-second stable rope head sheave, 24-second stable rope stable car, 25-second stable rope steel wire, 26-H-shaped steel material, 27-main beam, 28-TBM stepping chamber, 29-TBM starting chamber. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and advantages of the present application more clear, the following will be described in detail with reference to the drawings and specific embodiments.

[0021] In the construction process of the wind well, the derrick is erected above the wellhead, and a plurality of head sheaves and guide pulleys are arranged on the derrick, and a stable car group is arranged at the wellhead. These devices need to be removed after the completion of the construction of the wind well, which not only causes waste of resources, but also consumes a certain amount of time. Based on these devices, the present application innovatively reforms the wind well to have the function of lowering large equipment, which not only takes full advantage of the large cross section of the wind well to avoid the collision of large equipment, but also makes secondary use of the devices that need to be removed.

[0022] As shown in Figures 1-7 The embodiment of the present application provides a reforming method based on a wind well, which comprises the following steps: S10. The position of the movable pulley set is determined based on the length of the king beam 1, and the movable pulley set is provided with two sets, and the two sets of movable pulley sets are arranged at intervals above the king beam 1. In each set of movable pulley sets, one movable pulley 2 and two lowering head sheaves 3 arranged laterally on both sides of the two movable pulleys 2 are included. The distance between the two movable pulleys 2 is determined according to the length of the king beam 1 in the lateral direction, and the distance between the two movable pulleys 2 is not less than the length of the king beam 1.

[0023] Since each movable pulley 2 has a wheel groove in the circumferential direction for accommodating a cable, etc., to avoid the cable from being separated from the movable pulley 2, in each set of movable pulley sets, the diameter of the movable pulley 2 wheel groove is measured, so that the lateral spacing of the two lowering head sheaves 3 is adjusted, so that the distance between the two lowering head sheaves 3 is equal to the diameter of the movable pulley 2 wheel groove. Such arrangement can ensure that the two ends of the cable passing through the movable pulley 2 are parallel to each other, thereby avoiding the separation of the movable pulley 2 and the cable.

[0024] The stable car is selected as the lowering stable car 4 for pulling up the movable pulley, and the number of the stable car is the same as that of the lowering head sheave 3, and the lowering stable car 4 and the lowering head sheave 3 are aligned along the transverse direction.

[0025] S20. Determine the position of the first stable rope sheave 5 based on the length of the beam 1, select part of the sheave as the first stable rope sheave 5, adjust the position of the first stable rope sheave 5 in the lateral direction of the derrick, and ensure that the distance between the two first stable rope sheaves 5 is greater than the length of the beam 1 in the lateral direction. Select part of the stable vehicle as the first stable rope stable vehicle 6, and the first stable rope stable vehicle 6 is aligned with the first stable rope sheave 5 in the transverse direction.

[0026] S30. Lay the lowering platform 7 at the wellhead, and lay the track 8 along the lateral direction and the lateral traction mechanism 9 at the end of the track 8 on the lowering platform 7.

[0027] The lowering platform 7 includes a plurality of H-shaped steel materials 26, which are bolted together with the remaining main beam 27 to form a frame composed of a plurality of rectangles, and a steel plate is laid on the frame, and the track 8 is arranged along the lateral direction on the steel plate. The purpose of adding the lowering platform 7 is to protect the wellhead and prevent collapse at the wellhead.

[0028] S40. In the same group of movable pulley blocks, there is also a lowering steel wire 10, one end of which is connected to the winch of one of the lowering stable vehicles 4, and the other end is connected to the winch of the other lowering stable vehicle 4 after passing through the lowering sheave 3, the movable pulley 2, and the other lowering sheave 3 in turn.

[0029] The winch of the first stable rope stable vehicle 6 is connected to the first stable rope steel wire 11, and the other end of the first stable rope steel wire 11 is fixed to the bottom of the well after passing through the first stable rope sheave 5.

[0030] In step S40, in the same group of movable pulley blocks, the two lowering stable vehicles 4 simultaneously wind or unwind. The lowering steel wire 10 can be connected by two steel wires through a wire rope clamp to form a complete lowering steel wire 10.

[0031] The end of the first stable rope steel wire 11 at the bottom of the well is fixed by a fixed anchor rod.

[0032] S50. Suspend the beam 1 on the axle of the movable pulley 2 of each movable pulley block.

[0033] When the lowering stable vehicle 4 unwinds, the movable pulley 2 descends, driving the beam 1 to descend.

[0034] In order to prevent the lowering steel wire 10 and the first stabilizing rope steel wire 11 from rubbing against the derrick and causing damage to the steel wire, the lowering guide pulley 12 is also needed to be arranged in step S10. The guide pulley on the derrick is selected as the lowering guide pulley 12, and the position of the lowering guide pulley 12 is adjusted to ensure that the lowering guide pulley 12 changes the direction of the lowering steel wire 10 and avoids the lowering steel wire 10 rubbing against the derrick, and also to ensure that the lowering guide pulley 12 is located on the movement path of the lowering steel wire 10, that is, in the top view state, the lowering sheave 3, the lowering guide pulley 12 and the lowering stabilizer 4 should be located on the same straight line in the lateral direction.

[0035] Similarly, the first stabilizing rope guide pulley 13 is also needed to be arranged in step S20. The guide pulley on the derrick is selected as the first stabilizing rope guide pulley 13, and the position of the first stabilizing rope guide pulley 13 is adjusted to ensure that the first stabilizing rope guide pulley 13 changes the direction of the first stabilizing rope steel wire 11 and avoids the first stabilizing rope steel wire 11 rubbing against the derrick, and also to ensure that the first stabilizing rope guide pulley 13 is located on the movement path of the first stabilizing rope steel wire 11, that is, in the top view state, the first stabilizing rope sheave 5, the first stabilizing rope guide pulley 13 and the first stabilizing rope stabilizer 6 should be located on the same straight line in the lateral direction.

[0036] In step S20, it is needed to ensure that the distance between the first stabilizing rope steel wire 11 and the device being hoisted is greater than a preset distance, which is generally greater than 0.5 meters.

[0037] The aforementioned ingot beam 1 is a frame body, two lateral guide pulleys 14 are arranged in the frame body, and the lower end of the frame body is connected with a hoisting steel wire 15. The large device is connected with the frame body through the hoisting steel wire 15.

[0038] The hoisting support 16 is arranged on the axle of each movable pulley 2, the hoisting support 16 is arranged on the axle of the movable pulley 2 in a sleeved manner, and the axle of the movable pulley 2 is in clearance fit with the hoisting support 16, so as to ensure that the hoisting support 16 is always in a vertical state.

[0039] In the same group of movable pulley groups, the lower end of one hoisting support 16 is provided with a connecting steel wire 17, and the other end of the connecting steel wire 17 is connected with another hoisting support 16 after passing through two guide pulleys 14.

[0040] In the present application, since each movable pulley set corresponding to the lower stable car 4 needs to maintain the synchronous working state to collect and release the cable to ensure that the yuanbao beam 1 is always kept horizontal, avoiding the overloading of the hoisting steel wire 15 and the connecting steel wire 17 due to the inclination of the yuanbao beam 1, and the collapse. The control system for controlling the synchronization of each lower stable car 4 is not used in the construction process of the wind shaft, and the cost is too high, and the use efficiency is not high. Therefore, the yuanbao beam 1 is improved, through the setting of two fixed pulleys 14, which can not only ensure the stable connection of the connecting steel wire 17 and the yuanbao beam 1, but also realize self-balancing when the yuanbao beam 1 inclines, so as to ensure that the yuanbao beam 1 is always in a horizontal state (i.e. parallel to the horizontal plane, and the lateral plane), avoiding the collapse of the connecting steel wire 17 and the hoisting steel wire 15 or the hidden danger.

[0041] At least an assembly chamber 18 is further arranged at the bottom of the wind shaft, and the assembly chamber 18 is used for assembling the large-scale equipment which is disassembled. The chamber can be adaptively increased according to the equipment to be lowered. For example, when the large-scale equipment is a TBM, the TBM step chamber 28 and the TBM starting chamber 29 need to be sequentially increased.

[0042] Preferably, a track beam and a pneumatic hoist located on the track beam are further arranged in the assembly chamber 18, which are used for hoisting and assembling the large-scale equipment.

[0043] It should be noted that when the wind shaft is modified, the derrick needs to be adaptively cut to avoid blocking the large-scale equipment to be lowered. At the same time, when the stable car, the sheave and the guide wheel are insufficient or damaged, they can be appropriately increased, and the same stable car, sheave and guide wheel only play one role, for example, the lower guide wheel 12 cannot be used as the first stable rope guide wheel 13.

[0044] In the present application, by modifying the wind shaft, the advantage of the large cross section of the wind shaft is fully utilized to facilitate the transportation of large-scale equipment, and the problem of occupying the auxiliary shaft caused by transporting large-scale equipment by the auxiliary shaft is avoided. At the same time of modification, the derrick and the stable car group left over in the construction process of the wind shaft are reused, avoiding the waste of resources and shortening the preparation time.

[0045] The present application also provides a modified lowering device, which comprises the components obtained by the method for modifying the wind shaft as described above, and further comprises a bucket assembly. The bucket assembly comprises a bucket stable car 19, a bucket steel wire 20, a bucket 21 and a bucket sheave 22. Part of the stable cars is selected as the bucket stable car 19, part of the sheaves is selected as the bucket sheave 22, one end of the bucket steel wire 20 is connected with the bucket stable car 19, and the other end is connected with the bucket 21 through the bucket sheave 22. The bucket 21 is used for accommodating observation personnel or observation equipment to observe the lowering state above the yuanbao beam 1.

[0046] The two bucket sheaves 22 are arranged along the lateral direction with a spacing, and the two bucket steel wires 20 are arranged along the transverse direction and parallel to each other.

[0047] The lowering device further comprises a second stabilizing rope sheave 23 and a second stabilizing rope winch 24, and the selected part of the sheave is the second stabilizing rope sheave 23, and the selected part of the winch is the second stabilizing rope winch 24, and the second stabilizing rope winch 24 is connected with the second stabilizing rope steel wire 25, and the second stabilizing rope steel wire 25 is fixed at the bottom of the well after passing through the second stabilizing rope sheave 23.

[0048] The two second stabilizing rope sheaves 23 are arranged along the lateral direction with a spacing, and the spacing is greater than the spacing of the two bucket sheaves 22, and one of the second stabilizing rope sheaves 23 is located on the same transverse straight line with the second stabilizing rope winch 24, and the other second stabilizing rope sheave 23 is located on the other transverse straight line with the other second stabilizing rope winch 24, and the two bucket steel wires 20 are parallel.

[0049] Preferably, the lowering winch 4 is arranged on one side of the well mouth, the first stabilizing rope winch 6, the bucket winch 19 and the second stabilizing rope winch 24 are arranged on the other side of the well mouth.

[0050] The application further provides a lowering method of the lowering device, which adopts the lowering device described above, and comprises the following steps. S10. The large equipment is disassembled so that the disassembled parts are smaller than the well mouth.

[0051] Compared with the conventional auxiliary shaft access equipment, the cross section of the wind shaft is larger, the disassembly degree of the large equipment can be reduced, the reassembly at the bottom of the well is facilitated, and the assembly time is shortened.

[0052] At the same time, the first stabilizing rope winch 6 and the second stabilizing rope winch 24 work to tighten the first stabilizing rope steel wire 11 and the second stabilizing rope steel wire 25.

[0053] S20. The parts are dragged to the well mouth by the lateral traction mechanism 9 and connected with the treasure beam 1.

[0054] In the application, the parts can be easily dragged to the well mouth and connected with the treasure beam 1 by the sliding of the flat car on the track 8 and the traction of the lateral traction mechanism 9 to the flat car.

[0055] S30. The lowering winch 4 works to hoist the parts, and the lateral traction mechanism 9 drags the parts to offset the lateral tension during the hoisting process; when the parts are vertically suspended, the traction of the lateral traction mechanism 9 is cancelled, and the first stabilizing rope steel wire 11 on the same side is connected with the lowering steel wire 10 through the lifting ring.

[0056] S40. The lowering winch 4 releases the cable, and the parts are lowered to the bottom of the well. In the process of lowering, the bucket 21 serves as an observation platform to observe the lowering state above the yuanbao beam 1, so as to avoid the inclination of the parts. When small inclination occurs, the self-adaptation of the fixed pulley 14 is used for relief; when large inclination occurs, the pay-off speed of the lowering stabilizer 4 is controlled for adjustment.

[0057] S50. Assembling the disassembled parts at the well bottom.

[0058] The parts are assembled in the assembly chamber, and after assembly, they are put into use.

[0059] In the lowering method provided in the application, the weight of the parts is borne by the plurality of steel wires, so that the gravity is dispersed, and the load of the steel wire can be reduced. Meanwhile, the structure of the yuanbao beam 1 is innovated, the small inclination of the yuanbao beam 1 can be relieved, the inclination of the parts is avoided, and the first stabilizing rope steel wire 11 and the lowering steel wire 10 are connected through the lifting ring, so that the swinging and impact of the parts on the well wall in the process of lowering can be effectively avoided.

[0060] The above is the preferred embodiment of the application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A transformation method based on an air shaft, characterized in that: include: S10. Determine the position of the movable pulley assembly based on the length of the ingot beam. The movable pulley assembly comprises two sets, each set including a movable pulley for hoisting the ingot beam and lowering sheaves disposed lateral to the movable pulley. A portion of the sheaves on the derrick serve as lowering sheaves. The spacing between the two movable pulleys is determined based on the length of the ingot beam. The lateral spacing between the two lowering sheaves in each movable pulley assembly on the derrick is adjusted based on the diameter of the movable pulley grooves. An equal number of stabilizing vehicles are selected as lowering stabilizing vehicles for pulling the movable pulleys up and down. The lowering stabilizing vehicles are laterally aligned with the lowering sheaves. S20. Determine the position of the first stabilizing sheave based on the length of the Yuanbao beam, select a portion of the sheave as the first stabilizing sheave, adjust the lateral position of the first stabilizing sheave on the derrick so that the spacing is greater than the length of the Yuanbao beam, select a portion of the stabilizing car as the first stabilizing car, and align the first stabilizing car with the first stabilizing sheave in the transverse direction; S30. Laying the lowering platform at the wellhead, and laying the track set laterally on the lowering platform and the lateral traction mechanism provided at the end of the track; S40. In the same group of movable pulleys, the movable pulley group has a lowering wire, one end of the lowering wire is connected to one of the winches of the lowering stabilizing vehicle, and the other end is connected to the winch of the lowering sheave, the movable pulley, and another lowering sheave after being connected to the other winch of the lowering stabilizing vehicle; The winch of the first stabilizing rope and stabilizing vehicle is connected to a first stabilizing rope wire, and the other end of the first stabilizing rope wire passes through the first stabilizing rope sheave and is fixed to the bottom of the well; S50. Suspend the ingot beam on the movable pulley axle of each movable pulley assembly.

2. The wind shaft reconstruction method according to claim 1, characterized in that: Step S10 and step S20 also include selecting the guide wheel on the derrick as the lowering guide wheel and the first rope stabilizing guide wheel, adjusting the positions of the lowering guide wheel and the first rope stabilizing guide wheel so that the lowering guide wheel and the first rope stabilizing guide wheel are correspondingly located on the movement paths of the lowering wire and the first rope stabilizing wire.

3. The wind shaft reconstruction method according to claim 2, characterized in that: In step S10, the distance between the two lowering sheaves in each movable pulley assembly is equal to the diameter of the wheel groove of the movable pulley.

4. The wind shaft reconstruction method according to claim 3, characterized in that: The distance between the first stabilizing wire and the large equipment being hoisted is greater than a preset distance.

5. The wind shaft reconstruction method according to claim 1, characterized in that: The Yuanbao beam is a frame body, in which two fixed pulleys are arranged laterally, and the lower end of the frame body is connected to a lifting wire for lifting large equipment; A lifting bracket is provided on the axle of the movable pulley with clearance, and a connecting steel wire is provided at the lower end of one of the lifting brackets, and the other end of the connecting steel wire passes through the two fixed pulleys and is connected to the other lifting bracket.

6. The wind shaft reconstruction method according to claim 1, characterized in that: At least one assembly chamber is excavated at the bottom of the well for assembling equipment.

7. A modified lowering device, a component obtained by the wind shaft modification method according to any one of claims 1 to 6, characterized in that: Also includes: A bucket assembly includes a bucket stabilizing car, a bucket steel wire, a bucket and a bucket sheave. Part of the stabilizing car is selected as the bucket stabilizing car, and part of the sheave is selected as the bucket sheave. One end of the bucket steel wire is connected to the bucket stabilizing car, and the other end is connected to the bucket after passing through the bucket sheave.

8. The modified lowering device according to claim 7, characterized in that: The lowering device also includes a second stabilizing rope sheave and a second stabilizing rope stabilizing car. Part of the sheave and the stabilizing car are selected as the second stabilizing rope sheave and the second stabilizing rope stabilizing car. The winch of the second stabilizing rope stabilizing car is connected to the second stabilizing rope wire. The second stabilizing rope wire passes through the second stabilizing rope sheave and is fixed to the bottom of the well. The two second stabilizing rope sheaves are located laterally between the two bucket sheaves.

9. A lowering method, using the lowering device according to claim 8, characterized in that: The steps include: S10. Disassemble the large equipment so that the disassembled parts are smaller than the wellhead; S20. Use the lateral traction mechanism to drag the parts to the wellhead and connect them to the Yuanbao beam; S30. The parts are hoisted during the lowering and stabilizing work. During the hoisting process, the lateral traction mechanism pulls the parts to offset the lateral tension. S40. Lower the stabilizing vehicle and cable to lower the parts to the bottom of the well; S50. Assemble the disassembled parts at the bottom of the well.

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