CN104555833B - Method for hoisting steel inner cylinder of chimney - Google Patents

Method for hoisting steel inner cylinder of chimney Download PDF

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Publication number
CN104555833B
CN104555833B CN201410768614.4A CN201410768614A CN104555833B CN 104555833 B CN104555833 B CN 104555833B CN 201410768614 A CN201410768614 A CN 201410768614A CN 104555833 B CN104555833 B CN 104555833B
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CN
China
Prior art keywords
steel
cylinder
lifting
power
hoisting
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CN201410768614.4A
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Chinese (zh)
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CN104555833A (en
Inventor
赵丰
官昌贵
王勇
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中国核工业二三建设有限公司
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Priority to CN201410768614.4A priority Critical patent/CN104555833B/en
Publication of CN104555833A publication Critical patent/CN104555833A/en
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Publication of CN104555833B publication Critical patent/CN104555833B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00Capstans, winches or hoists
    • B66D2700/02Hoists or accessories for hoists
    • B66D2700/023Hoists

Abstract

The invention belongs to the technical field of hoisting construction. In order to solve the problem that the safety risk of the existing method for hoisting the steel inner cylinder of the chimney is large and the cost is high, the invention provides a tool for hoisting the steel inner cylinder of the chimney, which comprises a hoisting frame, four power devices and a lifting device; the hoisting frame is fixed on the top of the chimney; the power device is fixed on the lower surface of the hoisting frame; the lifting device can move up and down in the chimney. The tool improves the safety of the operation of hoisting the steel inner cylinder of the chimney and reduces the operation cost.

Description

Method for hoisting steel inner cylinder of chimney

Technical Field

The invention belongs to the technical field of hoisting construction, and particularly relates to a method for hoisting a steel inner cylinder of a chimney.

Background

The exhaust tower of a nuclear power station generally adopts sleeve type or multi-pipe type chimneys to respectively discharge flue gas because the radioactivity and the corrosiveness of the discharged flue gas are different. The steel inner cylinder needs to be installed in the sleeve type or multi-tube type chimney, and the steel inner cylinder is generally hoisted by adopting the following method at present:

(1) the hydraulic lifting method uses tools which usually comprise a hydraulic lifter, a hydraulic pump station, a hydraulic automatic control valve, a high-pressure oil pipe, an oil storage tank and the like, and has the following defects: the used tools have high lease and purchase cost and long preparation time, and need to be guided by professional staff for use; if the radioactive substance pollutes the whole set of equipment in the construction process, the whole set of equipment can not be used any more, and great economic loss is caused; the hoisting point must be replaced once in the hoisting process, when the hoisting point is replaced, the steel inner cylinder needs to be fixed in the chimney, the steel inner cylinder is heavy and limited by the space in the chimney, the fixing effect of the steel inner cylinder is poor, and great potential safety hazards exist.

(2) The hydraulic jacking method uses tools which usually comprise a hydraulic jack, a hydraulic support, a hydraulic pump station, an expansion ring, a support and the like, and has the following defects: the renting and purchasing cost is high, the preparation time is long, and professional personnel are required to guide the use; when the method is used, shaking-stopping points are required to be arranged at different heights of the chimney, and the hoisting process is complex; if the radioactive substance pollutes the whole set of equipment in the construction process, the whole set of equipment can not be used any more, and great economic loss is caused.

(3) The gas cap method needs to additionally manufacture a seal head with the same diameter as a chimney when in use, and needs to customize a special sealing ring in a manufacturer, so that the construction preparation period is longer, and the cost is higher.

Disclosure of Invention

In order to solve the problem that the existing method for hoisting the steel inner cylinder of the chimney has large safety risk and high cost, the invention provides a tool for hoisting the steel inner cylinder of the chimney, so that the safety of the operation of hoisting the steel inner cylinder of the chimney is improved, and the operation cost is reduced.

The tool for hoisting the steel inner cylinder of the chimney comprises a hoisting frame, four power devices and a lifting device; the hoisting frame is fixed on the top of the chimney; the power device is fixed on the lower surface of the hoisting frame; the lifting device can move up and down in the chimney.

Wherein, four power devices are evenly distributed on the circumference with the diameter equal to the outer diameter of the steel inner cylinder.

The power device is an electric hoist, and a plurality of sections of hoisting ropes are connected below the electric hoist.

And the length of each section of hoisting rope is equal to the height of each section of steel inner cylinder.

And the stroke of the power device is greater than the height of each section of the steel inner cylinder.

The lifting device comprises a lifting platform and a lifter, and a cable of the lifter is connected with the lifting platform and is suspended on the lifting frame.

The invention also provides a using method of the tool for hoisting the steel inner cylinder of the chimney, which comprises the following steps:

(1) dividing the four power devices into two groups, namely a group A power device and a group B power device, wherein each group comprises two power devices; placing a first section of steel inner cylinder on an installation reference surface in a chimney, and connecting an upper lifting lug of the first section of steel inner cylinder with a group B power device by using a lifting rope;

(2) controlling the power device B to lift the first section of steel inner cylinder until the distance between the first section of steel inner cylinder and the installation reference surface is greater than the height of the second section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder;

(3) placing the second section of steel inner cylinder on an installation reference surface in the chimney, controlling the power device B to enable the first section of steel inner cylinder to descend to be paired with the second section of steel inner cylinder, and then using a lifting device to convey an operator to the position where the first section of steel inner cylinder is paired with the second section of steel inner cylinder so as to fixedly connect the first section of steel inner cylinder with the second section of steel inner cylinder;

(4) the group A power device is connected with a lower lifting lug of the first section of the steel inner cylinder by using a lifting rope, the group A power device is controlled to lift the first section of the steel inner cylinder and the second section of the steel inner cylinder until the lifting rope connected with the group B power device is loosened, the lifting of the first section of the steel inner cylinder and the second section of the steel inner cylinder is stopped, and the lifting rope of the group B power device is detached from the first section of the steel inner cylinder; controlling the group A power device, continuously lifting the first section of steel inner cylinder and the second section of steel inner cylinder until the distance between the second section of steel inner cylinder and the installation reference surface is greater than the height of the third section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder and the second section of steel inner cylinder;

(5) placing the third section of steel inner cylinder on an installation reference surface in the chimney, and controlling the A group of power devices to enable the first section of steel inner cylinder and the second section of steel inner cylinder to descend so as to fixedly connect the second section of steel inner cylinder with the third section of steel inner cylinder;

(6) the B group power device is connected with the upper lifting lug of the first section of the steel inner cylinder by using a lifting rope, the B group power device is controlled to lift the first section of the steel inner cylinder, the second section of the steel inner cylinder and the third section of the steel inner cylinder until the lifting rope connected with the A group power device is loosened, the lifting of the first section of the steel inner cylinder, the second section of the steel inner cylinder and the third section of the steel inner cylinder is stopped, and the lifting rope connected with the A group power device is detached from the first section of the steel inner cylinder; controlling the group B power device, continuously lifting the first section of steel inner cylinder, the second section of steel inner cylinder and the third section of steel inner cylinder until the distance between the third section of steel inner cylinder and the installation reference surface is greater than the height of the fourth section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder, the second section of steel inner cylinder and the third section of steel inner cylinder;

(7) placing the fourth section of steel inner cylinder on an installation reference surface in the chimney, controlling the B group of power devices to descend so as to enable the third section of steel inner cylinder to be paired with the fourth section of steel inner cylinder, and stopping the B group of power devices after the third section of steel inner cylinder descends to a proper position; conveying an operator to a position where the third section of steel inner cylinder is connected with the fourth section of steel inner cylinder by using a lifting platform, and connecting the third section of steel inner cylinder with the fourth section of steel inner cylinder;

(8) the group A power device is connected with a lifting lug at the lower part of the first section of the steel inner cylinder by using a lifting rope, the group A power device is controlled to lift the first section of the steel inner cylinder, the second section of the steel inner cylinder, the third section of the steel inner cylinder and the fourth section of the steel inner cylinder until the lifting rope connected with the group B power device is loosened, and the group A power device is stopped; the lifting platform is used for conveying an operator to the upper lifting lug of the first section of the steel inner cylinder, and the operator unloads the lifting rope connected with the B group power device from the upper lifting lug of the first section of the steel inner cylinder; controlling the group A power device, continuously lifting the first section of steel inner cylinder, the second section of steel inner cylinder, the third section of steel inner cylinder and the fourth section of steel inner cylinder, and stopping the group A power device until the distance between the fourth section of steel inner cylinder and the installation reference surface is greater than the height of the fifth section of steel inner cylinder; and (4) hoisting the fifth section of steel inner cylinder and the later sections of steel inner cylinders repeatedly until the steel inner cylinders are hoisted integrally.

The tool and the using method thereof have the beneficial effects that: the tool comprises an electric hoist, a hoisting frame, a hoisting rope and a lifting platform, and the tool used by the hydraulic hoisting method generally comprises a hydraulic hoisting machine, a hydraulic pump station, a hydraulic automatic control valve, a high-pressure oil pipe, an oil storage tank and the like; the tools used by the hydraulic jacking method generally comprise a hydraulic jack, a hydraulic support, a hydraulic pump station, an expansion ring, a support and the like, and compared with the hydraulic lifting method and the hydraulic jacking method, the tool provided by the invention comprises fewer parts, is simple in structure and easy to operate, and does not need to be guided by professionals for use; the electric hoist, the hoisting frame, the hoisting rope and the lifting platform are tools frequently used in a construction site, and are cheaper than tools used in a hydraulic lifting method and a hydraulic jacking method, so that the renting or purchasing cost is reduced, and even if the tools cannot be used due to radioactive pollution in the construction process, large property loss cannot be caused; because the electric hoist, the hoisting frame, the hoisting rope and the lifting platform are all tools frequently used in a construction site, the tool is short in manufacturing time, the construction progress can be guaranteed, and the lease or purchase period of the tools used in the hydraulic lifting method and the hydraulic jacking method is long; when the gas cap method is used, a special sealing ring needs to be customized for a manufacturer, and the preparation period is long; when the tool provided by the invention is used for hoisting the steel inner cylinder of the chimney, the four electric hoists are divided into two groups, and the steel inner cylinder is hoisted alternately, so that the whole hoisting process is very safe, and when a hydraulic hoisting method is used, a main hoisting point needs to be replaced in the hoisting process, and when the hoisting point is replaced, other tools are needed to fix the steel inner cylinder in the chimney, and the steel inner cylinder is heavy and limited by the space in the chimney, so that the fixing effect of the steel inner cylinder is poor, and a great potential safety hazard exists; the tool improves the safety of the operation of hoisting the steel inner cylinder of the chimney and reduces the operation cost.

Drawings

FIG. 1 is a schematic front view of a tool for lifting a steel inner cylinder of a chimney according to the present invention;

FIG. 2 is a schematic diagram of a first section of steel inner cylinder hoisted by using the tool for hoisting the steel inner cylinder of the chimney;

FIG. 3 is a schematic diagram of the first section of steel inner cylinder and the second section of steel inner cylinder hoisted by using the tool for hoisting the steel inner cylinder of the chimney.

Detailed Description

The tool of the present invention is described below in conjunction with fig. 1-3.

As shown in fig. 1, the tool of the present invention comprises a lifting frame 10, four electric hoists (three electric hoists are shown in the figure). The hoisting frame 10 is fixed on the top of the chimney 34; a lifting lug 14 is arranged on the lower surface of the hoisting frame 10, and the electric hoist is arranged on the lifting lug 14; the four electric hoists are uniformly distributed on a circumference with the diameter equal to the outer diameter of the steel inner cylinder, when the tool is introduced below, the four electric hoists are divided into two groups, namely a group A and a group B, by taking the two electric hoists on one diameter of the circumference as a group, wherein the group A is provided with two electric hoists 11a and 11 a'; group B has two electric hoists 11B and 11B'. The power cables and the control cables 13 of the electric hoists of the A group and the B group are led to the bottom of the chimney 34 along the side wall of the chimney 34, and the control cables of the two electric hoists 11a and 11a 'of the A group are interlocked, so that the electric hoists 11a and 11 a' can be controlled simultaneously; the control cables of the two electric hoists 11B and 11B 'of the group B are interlocked to be able to control the electric hoists 11B and 11B' simultaneously. Wherein, the stroke of the electric block in the group A and the group B is larger than the height of each section of the steel inner cylinder. The electric hoists of the group A and the group B are respectively connected with hoisting ropes 12, and the hoisting ropes 12 are used for connecting the steel inner cylinders; the hoisting ropes 12 are in a plurality of sections, each section of hoisting rope 12 is connected through a shackle, and the length of each section of hoisting rope 12 is equal to the height of each section of steel inner cylinder. The lifting lugs are arranged on the steel inner cylinder, when the tool is used, the lifting ropes 12 are arranged on the lifting lugs of the steel inner cylinder to connect the electric hoist of the group A or the group B with the steel inner cylinder, and then the electric hoist of the group A or the group B is started to lift the steel inner cylinder upwards.

As shown in fig. 2, the tool of the present invention further includes a lifting device 15, the lifting device 15 includes a lifting platform and a hoist, the hoist is used as a power source, a steel wire rope of the hoist is connected with the lifting platform and suspended on the hoisting support 10, the hoist is used to pull the lifting platform, so that the lifting platform can move up and down in the chimney 34, and an operator can stand on the lifting platform to work. In the present embodiment, the electric hoist is used as the power device to lift the steel inner cylinder, but the power device to lift the steel inner cylinder is not limited to the electric hoist, and a winch may be used, and the power device capable of lifting the steel inner cylinder can achieve the functions of the present invention, and all of the power devices belong to the scope of the present invention.

The method of use of the tool of the present invention is described below.

First, as shown in fig. 2, when the method of the present invention is described below, two hoisting ropes connected to the two electric hoists 11a and 11a 'of the group a are referred to as a group a hoisting rope 121, two hoisting ropes connected to the two electric hoists 11B and 11B' of the group B are referred to as a group B hoisting rope 122, the group a hoisting rope 121 and the group B hoisting rope 122 are in several segments, and each segment is connected by a shackle and can be disassembled. The steel inner cylinder is divided into a plurality of sections before hoisting, and the sections of the steel inner cylinder are assembled together in the hoisting process. Two upper lifting lugs 38 are welded on the upper portion of the first section of steel inner cylinder 17, two lower lifting lugs 37 are welded on the lower portion of the first section of steel inner cylinder, and the upper lifting lugs 38 and the lower lifting lugs 37 are used as lifting points during lifting. Placing the first section of the steel inner cylinder 17 on the installation reference surface 16 in the chimney, connecting the group B hoisting ropes 122 to the upper lifting lugs 38 of the first section of the steel inner cylinder 17, and temporarily disconnecting the group A hoisting ropes 121 from the first section of the steel inner cylinder 17;

secondly, starting the two electric hoists 11B and 11B' of the group B to lift the first section of steel inner cylinder 17 upwards, and stopping lifting the first section of steel inner cylinder 17 when the distance between the first section of steel inner cylinder 17 and the installation reference surface 16 is greater than the height of the second section of steel inner cylinder 18;

thirdly, as shown in fig. 3, the second section of steel inner cylinder 18 is placed on the installation reference surface 16, the two electric hoists 11B and 11B 'in the group B are controlled, the first section of steel inner cylinder 17 is descended to pair the first section of steel inner cylinder 17 with the second section of steel inner cylinder 18, and the two electric hoists 11a and 11 a' in the group B are stopped after the first section of steel inner cylinder 17 is descended to a proper position; the lifting platform 15 is used for conveying an operator to the position where the first section of steel inner cylinder 17 is connected with the second section of steel inner cylinder 18, and the operator welds the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 in a butt joint mode or connects the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 through bolts;

fourthly, after the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 are fixedly connected by an operator, the group A hoisting ropes 121 are connected to the lower lifting lugs 37 of the first section of steel inner cylinder 17, the group A two electric hoists 11a and 11a 'are started, the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 are integrally lifted until the group B hoisting ropes 122 are loosened, the group A two electric hoists 11a and 11 a' are stopped, the operator is conveyed to the upper lifting lugs 38 of the first section of steel inner cylinder 17 by using the lifting platform 15, the group B hoisting ropes 122 are dismounted from the upper lifting lugs 38 by the operator, the group B two electric hoists 11B and 11B 'are started, the group B two electric hoists 11B and 11B' are descended, the first section of the group B hoisting ropes 122 is dismounted onto the lifting platform 15, and conveyed to the bottom of the chimney 34 by using the lifting platform 15; controlling the two electric hoists 11a and 11 a' of the group A to continuously lift the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 until the distance between the second section of steel inner cylinder 18 and the installation reference surface 16 is greater than the height of the third section of steel inner cylinder 19, and stopping lifting the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18;

fifthly, placing a third section of steel inner cylinder 19 on an installation reference surface 16 in the chimney, and controlling the A group of two electric hoists 11a and 11 a' to enable the first section of steel inner cylinder 17 and the second section of steel inner cylinder 18 to descend so as to fixedly connect the second section of steel inner cylinder 18 with the third section of steel inner cylinder 19;

sixthly, connecting the two electric hoists 11B and 11B 'of the group B with the lifting lug 38 at the upper part of the first section of the steel inner cylinder 17 by using the second section of the group B hoisting rope 122, controlling the two electric hoists 11B and 11B' of the group B to hoist the first section of the steel inner cylinder 17, the second section of the steel inner cylinder 18 and the third section of the steel inner cylinder 19 until the group A hoisting rope 121 is loosened, and stopping hoisting the first section of the steel inner cylinder 17, the second section of the steel inner cylinder 18 and the third section of the steel inner cylinder 19; the lifting platform 15 is used for conveying an operator to the lower lifting lug 37 of the first section of the steel inner cylinder 17, the operator unloads the group A lifting rope 121 from the lower lifting lug 37, starts the group A two electric hoists 11a and 11a ', enables the group A two electric hoists 11a and 11 a' to descend, unloads the first section of the group A lifting rope 121 to the lifting platform 15, and conveys the first section of the group A lifting rope 121 to the bottom of the chimney 34 by using the lifting platform 15; controlling the two electric hoists 11B and 11B' of the group B to continuously lift the first section of steel inner cylinder 17, the second section of steel inner cylinder 18 and the third section of steel inner cylinder 19 until the distance between the third section of steel inner cylinder 19 and the installation reference surface 16 is greater than the height of the fourth section of steel inner cylinder (not shown in the figure), and stopping lifting the first section of steel inner cylinder 17, the second section of steel inner cylinder 18 and the third section of steel inner cylinder 19;

seventhly, placing a fourth section of steel inner cylinder on an installation reference surface 16 in the chimney, controlling the two electric hoists 11B and 11B 'in the group B to descend so as to enable a third section of steel inner cylinder 19 to be paired with the fourth section of steel inner cylinder, and stopping the two electric hoists 11a and 11 a' in the group B after the third section of steel inner cylinder 19 descends to a proper position; the lifting platform 15 is used for conveying an operator to the position where the third section of steel inner cylinder 19 is connected with the fourth section of steel inner cylinder, and the third section of steel inner cylinder 19 is connected with the fourth section of steel inner cylinder;

eighthly, connecting the two electric hoists 11a and 11a ' of the group A with a lifting lug 37 at the lower part of the first section of the steel inner cylinder 17 by using the second section of the group A lifting rope 121, controlling the two electric hoists 11a and 11a ' of the group A to lift the first section of the steel inner cylinder 17, the second section of the steel inner cylinder 18, the third section of the steel inner cylinder 19 and the fourth section of the steel inner cylinder, and stopping the two electric hoists 11a and 11a ' of the group A until the group B lifting rope 122 is loosened; the lifting platform 15 is used for conveying an operator to the upper lifting lug 38 of the first section of the steel inner cylinder 17, the operator unloads the second section of the B group of lifting ropes 122 from the upper lifting lug 38 of the first section of the steel inner cylinder 17, starts the B group of two electric hoists 11B and 11B ', enables the B group of two electric hoists 11B and 11B' to descend, unloads the second section of the B group of lifting ropes 122 to the lifting platform 15, and conveys the second section of the B group of lifting ropes 122 to the bottom of the chimney 34 by using the lifting platform 15; controlling the A group of two electric hoists 11a and 11a ', continuously lifting the first section of steel inner cylinder 17, the second section of steel inner cylinder 18, the third section of steel inner cylinder 19 and the fourth section of steel inner cylinder until the distance between the fourth section of steel inner cylinder and the installation reference surface 16 is greater than the height of the fifth section of steel inner cylinder, and stopping the A group of two electric hoists 11a and 11 a'; and (4) hoisting the fifth section of steel inner cylinder and the later sections of steel inner cylinders repeatedly until the steel inner cylinders are integrally hoisted, so that the height of the steel inner cylinders penetrating out of the chimney 34 meets the design requirement.

The stroke of the group A and the group B electric hoists is larger than the height of each section of steel inner cylinder, preferably 1-2 m, so that in the second step, the first section of steel inner cylinder 17 can be lifted to a position where the distance between the first section of steel inner cylinder 17 and the installation reference surface 16 is larger than the height of the second section of steel inner cylinder 18, and the construction efficiency can be improved. The hoisting rope 12 adopts a segmented form, so that the defect of limited stroke of the electric hoist is overcome, and the stroke of the electric hoist is increased by disassembling the hoisting rope 12; the length of each section of hoisting rope 12 is equal to the height of each section of steel inner cylinder, so that after the hoisting rope 12 is disassembled, the hoisting rope 12 can be connected to the upper lifting lug or the lower lifting lug of each section of steel inner cylinder, and the condition that the hoisting rope 12 cannot be connected to the upper lifting lug or the lower lifting lug of each section of steel inner cylinder due to overlong or overlong length is avoided.

The tool comprises an electric hoist, a hoisting frame, a hoisting rope and a lifting platform, and the tool used by the hydraulic hoisting method generally comprises a hydraulic hoisting machine, a hydraulic pump station, a hydraulic automatic control valve, a high-pressure oil pipe, an oil storage tank and the like; the tools used by the hydraulic jacking method generally comprise a hydraulic jack, a hydraulic support, a hydraulic pump station, an expansion ring, a support and the like, and compared with the hydraulic lifting method and the hydraulic jacking method, the tool provided by the invention comprises fewer parts, is simple in structure and easy to operate, and does not need to be guided by professionals for use; the electric hoist, the hoisting frame, the hoisting rope and the lifting platform are tools frequently used in a construction site, and are cheaper than tools used in a hydraulic lifting method and a hydraulic jacking method, so that the renting or purchasing cost is reduced, and even if the tools cannot be used due to radioactive pollution in the construction process, large property loss cannot be caused; because the electric hoist, the hoisting frame, the hoisting rope and the lifting platform are all tools frequently used in a construction site, the tool for manufacturing the hydraulic lifting device is short in time and can ensure the construction progress, the lease or purchase period of the tools used in a hydraulic lifting method and a hydraulic jacking method is long, and when the gas cap method is used, a special sealing ring needs to be customized for a manufacturer, so the preparation period is long; when the tool provided by the invention is used for hoisting the steel inner cylinder of the chimney, the steel inner cylinder is hoisted alternately by the group A electric hoist and the group B electric hoist, and when the group A electric hoist and the group B electric hoist are switched, for example, the group A electric hoist is switched to the group B electric hoist, the steel inner cylinder is hoisted by the group A electric hoist, after hoisting ropes connected with the group B electric hoist are loosened, the hoisting ropes connected with the group B electric hoist are dismounted from the steel inner cylinder, so that the whole hoisting process is very safe, a hydraulic hoisting method is used, a main hoisting point needs to be replaced in the hoisting process, when the hoisting point is replaced, the steel inner cylinder needs to be fixed in the chimney by other tools, the weight of the steel inner cylinder is heavy, and is limited by the space in the chimney, the fixing effect of the steel inner cylinder is poor, and great potential safety hazards exist. The tool can hoist the chimney steel inner cylinders with various heights, and can also be used for the reconstruction, the maintenance and other operations of the chimney.

Claims (6)

1. A method for hoisting a steel inner cylinder of a chimney is characterized in that tools used in the method comprise a hoisting frame, four power devices and a lifting device; the hoisting frame is fixed on the top of the chimney; the power device is fixed on the lower surface of the hoisting frame; the lifting device can move up and down in the chimney, and the method comprises the following steps:
(1) dividing the four power devices into two groups, namely a group A power device and a group B power device, wherein each group comprises two power devices; placing a first section of steel inner cylinder on an installation reference surface in a chimney, and connecting an upper lifting lug of the first section of steel inner cylinder with a group B power device by using a lifting rope;
(2) controlling the power device B to lift the first section of steel inner cylinder until the distance between the first section of steel inner cylinder and the installation reference surface is greater than the height of the second section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder;
(3) placing the second section of steel inner cylinder on an installation reference surface in the chimney, controlling the power device B to enable the first section of steel inner cylinder to descend to be paired with the second section of steel inner cylinder, and then using a lifting device to convey an operator to the position where the first section of steel inner cylinder is paired with the second section of steel inner cylinder so as to fixedly connect the first section of steel inner cylinder with the second section of steel inner cylinder;
(4) the group A power device is connected with a lower lifting lug of the first section of the steel inner cylinder by using a lifting rope, the group A power device is controlled to lift the first section of the steel inner cylinder and the second section of the steel inner cylinder until the lifting rope connected with the group B power device is loosened, the lifting of the first section of the steel inner cylinder and the second section of the steel inner cylinder is stopped, and the lifting rope of the group B power device is detached from the first section of the steel inner cylinder; controlling the group A power device, continuously lifting the first section of steel inner cylinder and the second section of steel inner cylinder until the distance between the second section of steel inner cylinder and the installation reference surface is greater than the height of the third section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder and the second section of steel inner cylinder;
(5) placing the third section of steel inner cylinder on an installation reference surface in the chimney, and controlling the A group of power devices to enable the first section of steel inner cylinder and the second section of steel inner cylinder to descend so as to fixedly connect the second section of steel inner cylinder with the third section of steel inner cylinder;
(6) the B group power device is connected with the upper lifting lug of the first section of the steel inner cylinder by using a lifting rope, the B group power device is controlled to lift the first section of the steel inner cylinder, the second section of the steel inner cylinder and the third section of the steel inner cylinder until the lifting rope connected with the A group power device is loosened, the lifting of the first section of the steel inner cylinder, the second section of the steel inner cylinder and the third section of the steel inner cylinder is stopped, and the lifting rope connected with the A group power device is detached from the first section of the steel inner cylinder; controlling the group B power device, continuously lifting the first section of steel inner cylinder, the second section of steel inner cylinder and the third section of steel inner cylinder until the distance between the third section of steel inner cylinder and the installation reference surface is greater than the height of the fourth section of steel inner cylinder, and stopping lifting the first section of steel inner cylinder, the second section of steel inner cylinder and the third section of steel inner cylinder;
(7) placing the fourth section of steel inner cylinder on an installation reference surface in the chimney, controlling the B group of power devices to descend so as to enable the third section of steel inner cylinder to be paired with the fourth section of steel inner cylinder, and stopping the B group of power devices after the third section of steel inner cylinder descends to a proper position; conveying an operator to a position where the third section of steel inner cylinder is connected with the fourth section of steel inner cylinder by using a lifting platform, and connecting the third section of steel inner cylinder with the fourth section of steel inner cylinder;
(8) the group A power device is connected with a lifting lug at the lower part of the first section of the steel inner cylinder by using a lifting rope, the group A power device is controlled to lift the first section of the steel inner cylinder, the second section of the steel inner cylinder, the third section of the steel inner cylinder and the fourth section of the steel inner cylinder until the lifting rope connected with the group B power device is loosened, and the group A power device is stopped; the lifting platform is used for conveying an operator to the upper lifting lug of the first section of the steel inner cylinder, and the operator unloads the lifting rope connected with the B group power device from the upper lifting lug of the first section of the steel inner cylinder; controlling the group A power device, continuously lifting the first section of steel inner cylinder, the second section of steel inner cylinder, the third section of steel inner cylinder and the fourth section of steel inner cylinder, and stopping the group A power device until the distance between the fourth section of steel inner cylinder and the installation reference surface is greater than the height of the fifth section of steel inner cylinder; and (4) hoisting the fifth section of steel inner cylinder and the later sections of steel inner cylinders repeatedly until the steel inner cylinders are hoisted integrally.
2. The method of claim 1, wherein the four power devices are evenly distributed on a circumference having a diameter equal to the outer diameter of the steel inner cylinder.
3. The method for hoisting the steel inner cylinder of the chimney according to the claim 1 or 2, wherein the power device is an electric hoist, and a plurality of sections of hoisting ropes are connected below the electric hoist.
4. The method for hoisting the steel inner cylinder of the chimney according to claim 3, wherein the length of each section of the hoisting rope is equal to the height of each section of the steel inner cylinder.
5. The method for hoisting the steel inner cylinder of the chimney according to the claim 1 or 2, wherein the stroke of the power device is larger than the height of each section of the steel inner cylinder.
6. The method for hoisting the steel inner cylinder of the chimney according to the claim 1 or 2, wherein the lifting device comprises a lifting platform and a hoist, and a cable of the hoist is connected with the lifting platform and is suspended on the hoisting frame.
CN201410768614.4A 2014-12-12 2014-12-12 Method for hoisting steel inner cylinder of chimney CN104555833B (en)

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CN105048317B (en) * 2015-06-25 2017-07-07 许继集团有限公司 A kind of installation method of in-site installation suspension type valve tower

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CN101109233A (en) * 2006-07-18 2008-01-23 班云 Smokestack removing machine and smokestack removing method thereof
CN201647834U (en) * 2010-02-24 2010-11-24 攀钢集团冶金工程技术有限公司 Device for mounting tower equipment in narrow spaces
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