CN111634835A - Chimney upside-down mounting type hoisting method - Google Patents

Chimney upside-down mounting type hoisting method Download PDF

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Publication number
CN111634835A
CN111634835A CN202010349312.9A CN202010349312A CN111634835A CN 111634835 A CN111634835 A CN 111634835A CN 202010349312 A CN202010349312 A CN 202010349312A CN 111634835 A CN111634835 A CN 111634835A
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China
Prior art keywords
chimney
section
hoisting
upside
down mounting
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CN202010349312.9A
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谷媛媛
杨雷
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China MCC20 Group Corp Ltd
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China MCC20 Group Corp Ltd
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Priority to CN202010349312.9A priority Critical patent/CN111634835A/en
Publication of CN111634835A publication Critical patent/CN111634835A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention provides a chimney upside-down mounting type hoisting method, which comprises the following steps: a hoisting platform is erected on the roof of the main plant, a winch is arranged on the travelling beam platform, and a first section of chimney is hoisted by the winch through the connection of a steel wire rope between a hoisting point and the winch; arranging a second section of chimney on the travelling beam platform along the vertical direction, and welding the upper end of the second section of chimney and the lower end of the first section of chimney together; and lifting the third section of chimney and inserting the third section of chimney into a buttress frame of the crane beam platform, wherein the fourth section of chimney is arranged on the top of the fan room and is connected with the upper part of the roller hearth furnace. The chimney is constructed in sections, and the chimney is hoisted in a limited space by adopting a top-down flip method, so that the problem of chimney installation efficiency can be effectively solved; the hoisting operation of each section of chimney is carried out by arranging the winch, so that the problems that the hoisting operation can not be carried out by using a truck crane and the travelling crane in a workshop can not be utilized are solved, and the construction efficiency can be effectively improved.

Description

Chimney upside-down mounting type hoisting method
Technical Field
The invention relates to the technical field of mechanical equipment installation, in particular to a chimney inverted hoisting method.
Background
At present, the waste gas emission chimney of the roller-hearth furnace for brightening in the steel tube factory is designed and arranged between columns and lines of a steel structure factory (as shown in figure 2), the single weight of the chimney is large, two chimneys are arranged in parallel, a chimney main body is supported and fixed by three layers of buttresses, and the chimneys are all welded. When the chimney is hoisted, the chimney of the roller hearth furnace is designed in the middle of the main workshop, a truck crane cannot be used for hoisting operation, and in addition, the height of the chimney exceeds the roof of the main workshop, so that a travelling crane in a workshop cannot be used, and the chimney at the top is the longest, so that the chimney is difficult to hoist in place in the conventional hoisting mode.
Therefore, a chimney installation scheme is needed to solve the problem that the chimney is difficult to hoist in a limited space.
Disclosure of Invention
In view of the above, the invention provides a chimney upside-down mounting type hoisting method, and aims to solve the problem of smooth chimney installation in a limited space.
In one aspect, the invention provides a chimney upside-down mounting type hoisting method, which comprises the following steps:
the method comprises the following steps: a hoisting platform is erected on the roof of a main factory building, a winch is arranged on a driving beam platform, a hoisting point is arranged on the hoisting platform, and the hoisting point is connected with the winch through a steel wire rope;
step two: hoisting a first section of chimney through the winch, enabling the first section of chimney to penetrate through the roof of the main workshop along the vertical direction, and adjusting the first section of chimney to a preset installation height and a preset installation position;
step three: arranging a second section of chimney on the crane beam platform along the vertical direction, welding the upper end of the second section of chimney and the lower end of the first section of chimney together, and adjusting the central distance and the verticality of the first section of chimney and the second section of chimney after welding is finished;
step four: lifting a third section of chimney and then inserting the third section of chimney into a buttress frame of the crane beam platform, wherein a fourth section of chimney is arranged on the top of a fan room and is connected with the upper part of the roller hearth furnace; the third section of chimney is arranged between the second section of chimney and the fourth section of chimney, and the second section of chimney, the third section of chimney and the fourth section of chimney are connected together through welding after the second section of chimney, the third section of chimney and the fourth section of chimney are adjusted to preset positions.
Further, before the second step is executed, the first section of chimney, the second section of chimney, the third section of chimney and the fourth section of chimney are lifted by the winch and placed on the crane beam platform.
Further, when the second step is executed, a chimney hood is conveyed to the roof of the main factory building, and the chimney hood is installed to the upper end of the first section of chimney after the first section of chimney is installed.
Furthermore, a hoisting support is arranged on the hoisting platform, a pulley is arranged on the hoisting support, and the pulley is slidably connected with the steel wire rope.
Furthermore, the two winches are respectively arranged on the travelling crane beam platforms on two sides of the third section of chimney.
Further, first section chimney with main factory building roof hookup location sets up first supporting seat, first supporting seat sets up the side of going up on the main factory building roof, first supporting seat sets up four.
Furthermore, a second supporting seat is arranged at the joint of the second section of chimney and the travelling beam platform, the second supporting seat is arranged on the upper side face of the travelling beam platform, and the number of the second supporting seats is four.
Further, a third supporting seat is arranged at the joint of the fourth section of chimney and the fan roof, the third supporting seat is arranged on the upper side face of the fan roof, and the number of the third supporting seats is four.
Further, before the first step is executed, firstly, whether the load and strength design of the chimney meets the design requirement is verified, and the load and strength eta of the chimney is determined according to the formula (1),
Figure BDA0002471302930000021
wherein η is the load and strength of the chimney, P is the concentration force of the ith chimney, i is 4,Vhre is the Reynolds number, phi is the mode shape coefficient of the chimney, W0Is the downwind wind vibration coefficient, T, of the chimney1Is the basic natural vibration period of the chimney, H is the height of the chimney, d is the diameter of the chimney, H is less than or equal to 20d, β is the wind pressure height variation coefficient at each height of the chimney, AwArea of action for wind load, NkFor chimney overturning moment, GkIs the weight of the roller hearth furnace, VkIs the bearing capacity of the foundation, A is the sectional area of the chimney, W is the self weight of the chimney, PkM is a correction coefficient for the foundation reaction force.
Further, when the load and the strength eta of the chimney meet the design requirements, the hoisting construction of the chimney is started, and when the load and the strength eta of the chimney do not meet the design requirements, the chimney sections are adjusted according to the design specifications so as to meet the design requirements.
Compared with the prior art, the chimney mounting structure has the advantages that the chimney is constructed in sections, and the upside-down method is adopted for hoisting the chimney in the limited space, so that the engineering problem that the uppermost part of the chimney cannot be in place is solved, and the problem of chimney mounting efficiency can be effectively solved; meanwhile, the hoisting operation of each section of chimney is carried out by arranging the winch, so that the problems that the hoisting operation cannot be carried out by using a truck crane and the driving in a workshop cannot be utilized are solved, and the construction efficiency can be effectively improved.
Furthermore, the invention can ensure that the mounted chimney meets the standard requirement and improve the safety of the chimney by verifying whether the load and strength design of the chimney meets the design requirement.
Meanwhile, the method disclosed by the invention is strong in universality, convenient to implement and low in construction cost.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a chimney upside-down mounting type hoisting method provided by an embodiment of the invention;
fig. 2 is a diagram illustrating a structure of a first chimney according to an embodiment of the present invention;
fig. 3 is a structural diagram of a second chimney according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, the present embodiment provides a chimney upside-down mounting method, including:
step one, S101: a hoisting platform is erected on the roof of a main factory building, a winch is arranged on a driving beam platform, a hoisting point is arranged on the hoisting platform, and the hoisting point is connected with the winch through a steel wire rope;
step two S102: hoisting a first section of chimney through the winch, enabling the first section of chimney to penetrate through the roof of the main workshop along the vertical direction, and adjusting the first section of chimney to a preset installation height and a preset installation position;
step three, S103: arranging a second section of chimney on the crane beam platform along the vertical direction, welding the upper end of the second section of chimney and the lower end of the first section of chimney together, and adjusting the central distance and the verticality of the first section of chimney and the second section of chimney after welding is finished;
step four S104: lifting a third section of chimney and then inserting the third section of chimney into a buttress frame of the crane beam platform, wherein a fourth section of chimney is arranged on the top of a fan room and is connected with the upper part of the roller hearth furnace; the third section of chimney is arranged between the second section of chimney and the fourth section of chimney, and the second section of chimney, the third section of chimney and the fourth section of chimney are connected together through welding after the second section of chimney, the third section of chimney and the fourth section of chimney are adjusted to preset positions.
The chimney is constructed in sections, and the top-down inverted method is used for lifting the chimney in the limited space, so that the engineering problem that the uppermost part of the chimney cannot be in place is solved, and the problem of chimney installation efficiency can be effectively solved; meanwhile, the hoisting operation of each section of chimney is carried out by arranging the winch, so that the problems that the hoisting operation cannot be carried out by using a truck crane and the driving in a workshop cannot be utilized are solved, and the construction efficiency can be effectively improved.
Specifically, as shown in fig. 2 and 3, before the second step S102 is executed, the first section of chimney 1, the second section of chimney 2, the third section of chimney 3, and the fourth section of chimney 4 are lifted by the hoisting machine and placed on the crane beam platform 11.
Specifically, in the step S102, the stack cowl 5 is transported to the main building roof 10, and after the first stack segment 1 is installed, the stack cowl 5 is installed to the upper end of the first stack segment 1.
Specifically, a hoisting support 6 is arranged on the hoisting platform, a pulley 9 is arranged on the hoisting support 6, and the pulley 9 is slidably connected with the steel wire rope 8.
Specifically, the two windlasses 7 are respectively arranged on the travelling crane beam platforms 11 on two sides of the third section of chimney 3.
Particularly, first section chimney 1 with main building roof 10 hookup location sets up first supporting seat 13, first supporting seat 13 sets up the side of going up of main building roof 10, first supporting seat 13 sets up four.
Specifically, a second support seat 14 is arranged at the joint of the second section chimney 2 and the travelling beam platform 11, the second support seat 14 is arranged on the upper side surface of the travelling beam platform 11, and four second support seats 14 are arranged.
Particularly, fourth section chimney 4 with fan roof junction is provided with third supporting seat 15, third supporting seat 15 sets up on the last side of fan roof, third supporting seat 15 sets up four.
The method of the embodiment has the advantages of strong universality, convenience in implementation and low construction cost.
When the method is used, the procedure of connecting a welding opening in the air can be omitted, and the safety guarantee of constructors is improved. 2 5 tons of windlasses 7 are arranged in a hoisting mode and placed on a platform of +9.85 meters, a steel wire rope 8 is reversely arranged on a hoisting support 6 of +21.355 meters from the bottom, the hoisting support 6 is arranged on a structural framework, the steel wire rope 8 is vertically downwards laid, a chimney is hoisted in a segmented mode according to the hoisting sequence and placed on a workshop travelling beam platform 11, and then the assembly is sequentially hoisted according to the construction sequence.
The implementation process comprises the following steps: firstly, a temporary roof hoisting platform is set up, and two 5-ton winches 7 are provided with steel wire ropes 8 and hoisting points. And then the chimney hood 5 is transported to the roof and is paired with the chimney when being installed. Hoisting is started as follows:
the first step is as follows: and hoisting the first section of chimney 1 round pipe by using a winch 7, and assembling and welding the hood and the first section of chimney when the first section of chimney passes through a factory building of 21 meters, so as to adjust the height of the first section of chimney to the height required by the design.
The second step is that: directly standing the second section of chimney 2 on the driving beam platform 11 and then connecting the second section of chimney with the first section of chimney 1 at the lower part, wherein constructors can perform welding connection on the driving beam platform 11 by using a herringbone ladder, standing the two sections of chimneys simultaneously after welding to adjust the center distance and the verticality, welding 4 support piers, confirming the fixation after supporting and then dismantling the sling.
The third step: and hoisting the third section of square pipe, directly hoisting the third section of square pipe, inserting the third section of square pipe into a buttress frame of the crane beam platform 11, slightly fine-adjusting the upper chimney by using a chain block on the roof if the third section of square pipe interferes with the upper chimney, putting the third section of chimney 3 into the roof, putting the third section of chimney down, connecting the upper chimney and the lower chimney, adjusting the center distance and the verticality, and welding 4 buttresses for fixing.
The fourth step: the chimney is basically formed at the moment, the fourth section of chimney 4 can be paired and adjusted one by one on the roof of the fan room, and finally the buttress is fixed.
It can be seen that the inverted hoisting method adopted by the embodiment aims at the chimney hoisting in the condition that the space in a plant is limited and the crane in the truck crane and the plant cannot be utilized, the difficult problems in the prior art can be effectively solved, and the construction efficiency is improved. Meanwhile, the method is strong in universality, convenient to implement and low in construction cost.
In another preferred implementation manner based on the above embodiment, before performing the step S101, it is first verified whether the design of the load and strength of the chimney meets the design requirement, and the load and strength η of the chimney is determined according to the formula (1),
Figure BDA0002471302930000061
wherein η is the load and strength of chimney, P is the concentration force of ith chimney, i is 4, VhRe is the Reynolds number, phi is the mode shape coefficient of the chimney, W0Is the downwind wind vibration coefficient, T, of the chimney1Is the basic natural vibration period of the chimney, H is the height of the chimney, d is the diameter of the chimney, H is less than or equal to 20d, β is the wind pressure height variation coefficient at each height of the chimney, AwArea of action for wind load, NkFor chimney overturning moment, GkIs the weight of the roller hearth furnace, VkIs the bearing capacity of the foundation, A is the sectional area of the chimney, W is the self weight of the chimney, PkM is a correction coefficient for the foundation reaction force.
Specifically, when the load and the strength eta of the chimney meet the design requirements, the hoisting construction of the chimney is started, and when the load and the strength eta of the chimney do not meet the design requirements, the chimney sections are adjusted according to the design specifications so as to meet the design requirements.
Specifically, when adjusting each section of the chimney, the adjustment is performed according to the prior art specifications.
It can be seen that, this embodiment can make the chimney of installation accord with the standard requirement through verifying whether the load and the intensity design of chimney satisfy the design requirement, improves the security of chimney.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (10)

1. A chimney inverted hoisting method is characterized by comprising the following steps:
the method comprises the following steps: a hoisting platform is erected on the roof of a main factory building, a winch is arranged on a driving beam platform, a hoisting point is arranged on the hoisting platform, and the hoisting point is connected with the winch through a steel wire rope;
step two: hoisting a first section of chimney through the winch, enabling the first section of chimney to penetrate through the roof of the main workshop along the vertical direction, and adjusting the first section of chimney to a preset installation height and a preset installation position;
step three: arranging a second section of chimney on the crane beam platform along the vertical direction, welding the upper end of the second section of chimney and the lower end of the first section of chimney together, and adjusting the central distance and the verticality of the first section of chimney and the second section of chimney after welding is finished;
step four: lifting a third section of chimney and then inserting the third section of chimney into a buttress frame of the crane beam platform, wherein a fourth section of chimney is arranged on the top of a fan room and is connected with the upper part of the roller hearth furnace; the third section of chimney is arranged between the second section of chimney and the fourth section of chimney, and the second section of chimney, the third section of chimney and the fourth section of chimney are connected together through welding after the second section of chimney, the third section of chimney and the fourth section of chimney are adjusted to preset positions.
2. The chimney upside-down mounting method according to claim 1, wherein before the second step is performed, the first section of chimney, the second section of chimney, the third section of chimney and the fourth section of chimney are lifted by the hoisting machine and placed on the crane beam platform.
3. The chimney upside-down mounting method according to claim 1, wherein in the second step, a chimney hood is conveyed to a roof of a main factory building, and the chimney hood is mounted to the upper end of the first segment of chimney after the first segment of chimney is mounted.
4. The chimney upside-down mounting type hoisting method according to claim 1, wherein a hoisting support is arranged on the hoisting platform, pulleys are arranged on the hoisting support, and the pulleys are slidably connected with the steel wire rope.
5. The chimney upside-down mounting type hoisting method according to claim 1, wherein two windlasses are arranged on the travelling beam platforms on two sides of the third section of chimney respectively.
6. The chimney upside-down mounting type hoisting method according to claim 1, wherein a first support seat is arranged at a position where the first section of chimney is connected with the roof of the main plant, the first support seat is arranged on the upper side face of the roof of the main plant, and four first support seats are arranged.
7. The chimney upside-down mounting type hoisting method according to claim 1, wherein a second support seat is arranged at the joint of the second section of chimney and the travelling beam platform, the second support seat is arranged on the upper side face of the travelling beam platform, and four second support seats are arranged.
8. The chimney upside-down mounting method according to claim 1, wherein a third support seat is provided at a junction of the fourth segment chimney and the fan roof, the third support seat is provided on an upper side surface of the fan roof, and four third support seats are provided.
9. The chimney upside-down mounting method according to any one of claims 1 to 8, wherein before the step one, it is first verified whether the design of the load and strength of the chimney meets the design requirement, and the load and strength η of the chimney is determined according to the formula (1),
Figure FDA0002471302920000021
wherein η is the load and strength of chimney, P is the concentration force of ith chimney, i is 4, VhRe is the Reynolds number, phi is the mode shape coefficient of the chimney, W0Is the downwind wind vibration coefficient, T, of the chimney1Is the basic natural vibration period of the chimney, H is the height of the chimney, d is the diameter of the chimney, H is less than or equal to 20d, β is the wind pressure height variation coefficient at each height of the chimney, AwArea of action for wind load, NkFor chimney overturning moment, GkIs the weight of the roller hearth furnace, VkIs the bearing capacity of the foundation, A is the sectional area of the chimney, W is the self weight of the chimney, PkM is a correction coefficient for the foundation reaction force.
10. The chimney upside-down mounting method according to claim 9, wherein the chimney hoisting construction is started when the load and the strength η of the chimney meet the design requirements, and when the load and the strength η of the chimney do not meet the design requirements, the chimney sections are adjusted according to the design specifications to meet the design requirements.
CN202010349312.9A 2020-04-28 2020-04-28 Chimney upside-down mounting type hoisting method Pending CN111634835A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043973A (en) * 1989-11-06 1990-07-18 浙江省工业设备安装公司 Equal-diameter steel chimney holder-on upside-down charging method
RU2160814C2 (en) * 1999-02-15 2000-12-20 Гришечкин Александр Иванович Chimney stack and method for its erection
CN202644961U (en) * 2012-04-18 2013-01-02 二十三冶建设集团有限公司 Lifting system for installing inner barrel of reinforced concrete tail gas chimney
CN110159057A (en) * 2019-05-24 2019-08-23 中国二十二冶集团有限公司 Technological transformation workshop chimney construction method of installation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1043973A (en) * 1989-11-06 1990-07-18 浙江省工业设备安装公司 Equal-diameter steel chimney holder-on upside-down charging method
RU2160814C2 (en) * 1999-02-15 2000-12-20 Гришечкин Александр Иванович Chimney stack and method for its erection
CN202644961U (en) * 2012-04-18 2013-01-02 二十三冶建设集团有限公司 Lifting system for installing inner barrel of reinforced concrete tail gas chimney
CN110159057A (en) * 2019-05-24 2019-08-23 中国二十二冶集团有限公司 Technological transformation workshop chimney construction method of installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨雷: "倒装法烟囱吊装技术总结", 《海外文摘》 *

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Application publication date: 20200908