CN113565365A - Novel chimney steel inner cylinder hoisting support and construction method thereof - Google Patents
Novel chimney steel inner cylinder hoisting support and construction method thereof Download PDFInfo
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- CN113565365A CN113565365A CN202110866417.6A CN202110866417A CN113565365A CN 113565365 A CN113565365 A CN 113565365A CN 202110866417 A CN202110866417 A CN 202110866417A CN 113565365 A CN113565365 A CN 113565365A
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- inner cylinder
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- 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
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
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- 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
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a novel chimney steel inner cylinder hoisting support which comprises a base, wherein a first direction and a second direction are defined on the base in a self-defined mode; a plurality of positioning ribs fixedly arranged along the geometric center of the base to the edge of the base in a first direction; a riser extending outwardly in a second direction and along a geometric center of the base; a plurality of diagonal draw bars, one end of each diagonal draw bar is fixedly connected with the vertical pipe, and the other end of each diagonal draw bar is fixedly connected with the outer edge surface of the base; and the hoisting ring is fixedly arranged on the outer edge surface of the vertical pipe. By means of the matching mode of the base, the plurality of positioning ribs, the vertical pipe, the plurality of diagonal draw bars and the hanging ring, when the chimney steel inner cylinder is hoisted, the chimney steel inner cylinder hoisting device is convenient to use and install, has the characteristics of stability, reliability, cost saving and good economic benefit, can effectively save cost due to the fact that used materials are waste materials or leftover materials left in a construction site, ensures safety in the steel inner cylinder hoisting construction process, has strong operability, and ensures equipment safety.
Description
Technical Field
The invention relates to the technical field of chimney steel inner cylinder hoisting construction, in particular to a novel chimney steel inner cylinder hoisting support and a construction method thereof.
Background
For the traditional steel inner cylinder hoisting, most of the hoisting points are welded and fixed by adopting an integral annular box girder, namely, the hoisting points are directly welded at the hoisting part of the steel inner cylinder. The hoisting mode wastes the installation time of the hoisting tool and is not convenient for the turnover use of the hoisting tool. In addition, when the steel inner barrel is hoisted, the uniform stress of the position of a barrel hoisting point is required to be ensured, the hoisting point is generally designed to be an annular beam, and the steel annular beam is integrally welded to the barrel wall after the inner barrel is manufactured and is combined into a unified whole. The size of the ring beam is uniform, the ring beam is usually characterized by large section and heavy weight in order to meet the stress requirement, and the section size design has no pertinence, so that material waste is caused to a certain degree.
The method for manufacturing the chimney body designed by the industrial building drawing is generally in a combined form of a reinforced concrete cylinder wall, an internal concrete structure platform and a steel inner cylinder. The construction of the steel inner cylinder usually adopts a steel cable type hydraulic lifting inverted installation method construction process, and the support is stable and reliable; the high-altitude operation is less and safe; the lifting height can be adjusted at will, so that uneven lifting is prevented; the construction quality is easy to control and the adaptability is strong; low construction cost and good economic benefit. Therefore, the hoisting bracket can be produced by the construction process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel chimney steel inner cylinder hoisting support and a construction method thereof, which are used for solving the problems in the background art.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a novel chimney steel inner tube hoisting support, includes:
the base is used for forming a lifting force application assembly of a chimney steel inner cylinder lifting bracket; a first direction and a second direction are defined on the base in a self-defined mode;
the positioning ribs are fixedly arranged at the extending positions of the geometric centers of the bases to the edge positions of the bases in a first direction, each positioning rib is vertically arranged with the base, and the same distance is reserved between every two positioning ribs for limiting the steel inner cylinder of the chimney;
the vertical pipe extends outwards along the geometric center of the base in a second direction, is fixedly connected with the base and is used for forming a lifting force application assembly of a chimney steel inner cylinder lifting support;
the chimney steel inner cylinder hoisting support comprises a plurality of diagonal draw bars, wherein one end of each diagonal draw bar is fixedly connected with the vertical pipe, and the other end of each diagonal draw bar is fixedly connected with the outer edge surface of the base;
and the hoisting ring is fixedly arranged on the outer edge surface of the vertical pipe and is used for connecting external hoisting equipment.
As an improvement of the novel chimney steel inner cylinder hoisting support, the sizes of the base, the positioning ribs, the vertical pipe, the diagonal draw bars and the hoisting rings are all designed according to the diameter of the installed chimney steel inner cylinder and the maximum single-section weight of the chimney steel inner cylinder, the sizes include inner diameter, outer diameter and height, and the base, the positioning ribs, the vertical pipe, the diagonal draw bars and the hoisting rings are all made of steel materials prepared from leftover materials.
As an improvement of the novel chimney steel inner cylinder hoisting support, the base is formed by welding two square pipes, and the welded base is of a cross structure.
As an improvement of the novel chimney steel inner cylinder hoisting support, the number of the positioning ribs is eight, the positioning ribs are uniformly distributed on the outer edge surfaces of the two end parts of each square pipe, and the positioning ribs are made of round steel.
As an improvement of the novel chimney steel inner cylinder hoisting support, the vertical pipe is a square pipe and is welded on the outer edge surface of the geometric center of the base.
In one possible implementation mode of the novel chimney steel inner cylinder hoisting support provided by the invention, four diagonal draw bars are provided, each diagonal draw bar and the vertical pipe form an acute included angle of 15-45 degrees, and the diagonal draw bars are made of round steel.
As an improvement of the novel chimney steel inner cylinder hoisting support, the hoisting ring is a U-shaped hoisting ring or a C-shaped hoisting ring or an O-shaped hoisting ring, and the hoisting ring is made of round steel.
As an improvement of the novel chimney steel inner cylinder hoisting bracket, the first direction and the second direction are perpendicular to each other, the first direction is a transverse direction relative to the base, and the second direction is a longitudinal direction relative to the base.
The invention provides a construction method for hoisting a steel inner cylinder of a chimney, which comprises the following steps:
firstly, lofting and batching are carried out according to the diameter of an installed chimney steel inner cylinder, the maximum single-section weight of the cylinder and a process design drawing of the chimney steel inner cylinder;
secondly, welding two square pipes with the size of 100 multiplied by 50 multiplied by 2(mm) into a cross shape, wherein the length of the two square pipes formed by welding is set to be 1770 mm;
thirdly, finding out the center of a chimney steel inner cylinder at the cross center of two square pipes which are welded and formed and have the sizes of 100 multiplied by 50 multiplied by 2(mm), respectively discharging two circular big samples at positions which extend outwards and have the diameters of 1530mm and 1670mm by taking the cross center of the two square pipes as the center of a circle on the basis of the outer edge surfaces of the two square pipes, and respectively welding phi 20 round steel with the length of 100mm at the gap between every two circular big samples to form the limit of the chimney steel inner cylinder;
fourthly, welding a square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm at the center of the cross, and vertically welding and forming the square tube at the center of the cross to form a lifting force application assembly of the chimney steel inner cylinder lifting support;
fifthly, welding phi 20 round steel with the length of 1830mm on each side surface of the square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm for connecting the square tube with the length of 50 multiplied by 2(mm) and the base so as to enhance the stability of the chimney steel inner cylinder hoisting support;
and sixthly, welding a U-shaped hanging ring on the top of the square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm to form a force application assembly connected with external hoisting equipment.
As an improvement on the hoisting construction method of the chimney steel inner cylinder, the square pipe with the size of 100 multiplied by 50 multiplied by 2(mm), the phi 20 round steel with the length of 100mm, the square pipe with the size of 50 multiplied by 2(mm) and the length of 2500mm, the phi 20 round steel with the length of 1830mm and the U-shaped hanging ring are all prepared from leftover materials.
Compared with the prior art, the invention has the beneficial effects that:
through the matching mode of the base, the plurality of positioning ribs, the vertical pipe, the plurality of diagonal draw bars and the hanging ring, when the chimney steel inner cylinder is hoisted, the chimney steel inner cylinder hoisting device is convenient to install and use, has the characteristics of stability, reliability, cost saving and good economic benefit, and meanwhile, most of used materials are waste materials or leftover materials left in a construction site, so that the cost can be effectively saved, the safety of the steel inner cylinder in the hoisting construction process is ensured, the device has strong operability, and the device safety is ensured.
Drawings
The disclosure of the present invention is illustrated with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which like reference numerals are used to indicate like parts. Wherein:
fig. 1 is a schematic structural view of an overall structure of a chimney steel inner cylinder hoisting bracket according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an overall structure of a chimney steel inner cylinder hoisting bracket according to an embodiment of the present invention.
Description of the drawings:
1-base, 2-positioning rib, 3-vertical pipe, 4-diagonal brace, 5-hoisting ring, 6-chimney steel inner cylinder, X-first direction and Y-second direction.
Detailed Description
It is easily understood that according to the technical solution of the present invention, a person skilled in the art can propose various alternative structures and implementation ways without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as all of the present invention or as limitations or limitations on the technical aspects of the present invention.
As shown in fig. 1-2, as an embodiment of the present invention, the present invention provides a technical solution: the utility model provides a novel chimney steel inner tube hoisting support, includes:
the base 1 is used for forming a hoisting force application assembly of a chimney steel inner cylinder 6 hoisting bracket; a first direction X and a second direction Y are defined on the base 1 by self, and it should be noted that, in the specific implementation, 100 × 50 × 2(mm) square pipes are welded into a cross shape, the length of each of the two welded square pipes is 1770mm, the first direction X and the second direction Y are perpendicular to each other, the first direction X is a transverse direction relative to the base 1, and the second direction Y is a longitudinal direction relative to the base 1;
the chimney steel inner cylinder positioning device further comprises a plurality of positioning ribs 2 fixedly installed at the extending position of the geometric center of the base 1 to the edge position of the base in the first direction X, each positioning rib 2 is vertically installed with the base 1, equal distance is reserved between every two positioning ribs 2 and used for limiting the chimney steel inner cylinder 6, eight positioning ribs 2 are arranged, it can be understood that the distance reserved between every two positioning ribs 2 can be unequal, the specific design distance can be determined according to the diameter of the installed chimney steel inner cylinder 6, the maximum single-section weight of the cylinder and the process design drawing of the chimney steel inner cylinder 6, in the specific implementation, a user can find the circle center of the steel inner cylinder at the cross center of a square tube of 100 multiplied by 50 multiplied by 2(mm), and respectively release two circular big samples at positions of 1530mm (radius 765mm) and 1670mm (radius 835mm) by taking the cross center as the circle center, at this time, 8 coincident positions are arranged at the end part of the square tube passing through 100 multiplied by 50 multiplied by 2(mm), respectively welding a phi 20 round steel with the length of 100mm in the middle of each position, and welding the phi 20 round steel with the length of 100mm perpendicular to the square pipe;
the chimney steel inner cylinder lifting support is characterized by further comprising a vertical pipe 3 extending outwards along the geometric center of the base 1 in the second direction Y, wherein the vertical pipe 3 is fixedly connected with the base 1 and used for forming a lifting force application assembly of the chimney steel inner cylinder 6 lifting support, when in specific implementation, a square pipe 50 multiplied by 2(mm) long by 2500mm is welded to the cross square pipe base 1 in the middle and is vertically welded to the center of the cross square pipe base 1, and the vertical pipe 3 is a square pipe and is welded to the outer edge face of the geometric center of the base 1;
the chimney inner cylinder 6 lifting support further comprises a plurality of diagonal draw bars 4, one end of each diagonal draw bar 4 is fixedly connected with the vertical pipe 3, and the other end of each diagonal draw bar 4 is fixedly connected with the outer edge surface of the base 1, each diagonal draw bar 4 forms a certain included angle with the vertical pipe 3 and the base 1 respectively, and is used for connecting the vertical pipe 3 with the base 1 to enhance the stability of the chimney inner cylinder 6 lifting support, it is noted that in an embodiment of the invention, four diagonal draw bars 4 are provided, and each diagonal draw bar 4 forms an acute included angle of 15-45 degrees with the vertical pipe 3, for example, the included angle formed by each diagonal draw bar 4 and the vertical pipe 3 is any one or any two value of 15-20 degrees, 20-30 degrees or 30-45 degrees, wherein the included angle formed by each diagonal draw bar 4 and the vertical pipe 3 is preferably 20 degrees, the diagonal draw bars 4 are made of round steel, in the concrete implementation, a phi 20 round steel bar with the length of 1830mm is welded on each of four side surfaces of a square pipe with the length of 50 x 2(mm) as the diagonal draw bar 2500, the angle between the lower end part of the diagonal draw bar 4 and the cross square tube base 1 is 70 degrees, and the angle between the upper end part of the diagonal draw bar 4 and a 50 multiplied by 2(mm) square tube, namely the angle between the diagonal draw bar and the vertical tube 3 is 20 degrees;
the lifting device is characterized by further comprising a lifting ring 5 fixedly installed on the outer edge surface of the vertical pipe 3 and used for connecting external lifting equipment, wherein in the concrete implementation process, a user welds a U-shaped lifting ring 5 on the top of a square pipe with the length of 50 multiplied by 2(mm) and the length of 2500mm, and two ends of the U-shaped lifting ring 5 are welded and connected with the square pipe with the size of 50 multiplied by 2(mm) and the length of 2500 mm.
Based on the technical conception, it should be noted that the dimensions of the base 1, the positioning ribs 2, the vertical pipe 3, the diagonal draw bars 4 and the hanging ring 5 all use the diameter of the installed chimney steel inner cylinder 6 and the maximum single-section weight of the chimney steel inner cylinder 6 as design basis, the dimensions include inner diameter, outer diameter and height, the base 1, the positioning ribs 2, the vertical pipe 3, the diagonal draw bars 4 and the hanging ring 5 are all made of steel materials prepared from leftover materials, it can be understood that most of the used materials are the left waste materials or leftover materials in the construction site, the cost can be effectively saved, the safety in the construction process of hoisting the steel inner cylinder is ensured, and the invention has strong operability, and the invention has the characteristics of convenient use and installation, stability, reliability, cost saving and good economic benefit when hoisting the chimney steel inner cylinder 6 through the matching mode of the base 1, the plurality of positioning ribs 2, the vertical pipe 3, the plurality of diagonal draw bars 4 and the hanging ring 5, meanwhile, most of the used materials are waste materials or leftover materials left in construction sites, cost can be effectively saved, safety in the steel inner cylinder hoisting construction process is guaranteed, and the steel inner cylinder hoisting construction method has strong operability and guarantees equipment safety.
In an embodiment of the present invention, the hanging ring 5 may be a C-shaped hanging ring or an O-shaped hanging ring, besides the U-shaped hanging ring, and is made of round steel.
The invention provides a construction method for hoisting a steel inner cylinder of a chimney, which comprises the following steps:
firstly, lofting and batching are carried out according to the diameter of the installed chimney steel inner cylinder 6, the maximum single-section weight of the cylinder and a process design drawing of the chimney steel inner cylinder 6;
secondly, welding two square pipes with the size of 100 multiplied by 50 multiplied by 2(mm) into a cross shape, wherein the length of the two square pipes formed by welding is set to be 1770 mm;
thirdly, finding out the center of the chimney steel inner cylinder 6 at the cross center of the two square pipes formed by welding, respectively discharging two circular large samples at positions which take the cross center as the center of a circle, extend outwards to have the diameter of 1530mm and the diameter of 1670mm based on the outer edge surfaces of the two square pipes, and respectively welding phi 20 round steel with the length of 100mm at the gap between every two circular large samples to form the limit of the chimney steel inner cylinder 6;
fourthly, welding a square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm at the center of the cross, and vertically welding and forming the square tube at the center of the cross to form a lifting force application assembly of the chimney steel inner cylinder 6 lifting support;
fifthly, welding phi 20 round steel with the length of 1830mm on the side surface of each square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm for connecting the square tube with the length of 50 multiplied by 2(mm) and the base 1 to strengthen the stability of the lifting support of the chimney steel inner cylinder 6;
sixthly, welding a U-shaped hanging ring 5 on the top of a square tube with the length of 50 multiplied by 2(mm) to form a force application component connected with external hoisting equipment, wherein the square tube with the size of 100 multiplied by 50 multiplied by 2(mm), the phi 20 round steel with the length of 100mm, the square tube with the size of 50 multiplied by 2(mm) with the length of 2500mm, the phi 20 round steel with the length of 1830mm and the U-shaped hanging ring 5 are all prepared from leftover materials.
The technical scope of the present invention is not limited to the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and such changes and modifications should fall within the protective scope of the present invention.
Claims (10)
1. The utility model provides a novel chimney steel inner tube hoisting support which characterized in that: the method comprises the following steps:
the base is used for forming a lifting force application assembly of a chimney steel inner cylinder lifting bracket; a first direction and a second direction are defined on the base in a self-defined mode;
the positioning ribs are fixedly arranged at the extending positions of the geometric centers of the bases to the edge positions of the bases in a first direction, each positioning rib is vertically arranged with the base, and the same distance is reserved between every two positioning ribs for limiting the steel inner cylinder of the chimney;
the vertical pipe extends outwards along the geometric center of the base in a second direction, is fixedly connected with the base and is used for forming a lifting force application assembly of a chimney steel inner cylinder lifting support;
the chimney steel inner cylinder hoisting support comprises a plurality of diagonal draw bars, wherein one end of each diagonal draw bar is fixedly connected with the vertical pipe, and the other end of each diagonal draw bar is fixedly connected with the outer edge surface of the base;
and the hoisting ring is fixedly arranged on the outer edge surface of the vertical pipe and is used for connecting external hoisting equipment.
2. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the size of base, location muscle, riser, diagonal draw and rings all uses the biggest single-stage weight of chimney steel inner tube diameter and the chimney steel inner tube of installation as the design basis, the size includes internal diameter, external diameter and height, just base, location muscle, riser, diagonal draw and rings are the steel that is formed by the leftover bits preparation.
3. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the base is formed by welding two square pipes, and the base is of a cross structure.
4. The novel chimney steel inner cylinder hoisting support according to claim 1 or 3, characterized in that: the location muscle is equipped with eight, and evenly distributed in the both ends outer fringe face of every square pipe, the location muscle adopts the round steel.
5. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the stand pipe is square pipe and welds in the geometric centre outer fringe face of base.
6. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the number of the diagonal draw bars is four, each diagonal draw bar and the vertical pipe form an acute included angle of 15-45 degrees, and the diagonal draw bars are made of round steel.
7. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the lifting ring is a U-shaped lifting ring or a C-shaped lifting ring or an O-shaped lifting ring, and the lifting ring is made of round steel.
8. The novel chimney steel inner cylinder hoisting support according to claim 1, characterized in that: the first direction and the second direction are perpendicular to each other, the first direction is a transverse direction relative to the base, and the second direction is a longitudinal direction relative to the base.
9. The chimney steel inner cylinder hoisting construction method according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
firstly, lofting and batching are carried out according to the diameter of an installed chimney steel inner cylinder, the maximum single-section weight of the cylinder and a process design drawing of the chimney steel inner cylinder;
secondly, welding two square pipes with the size of 100 multiplied by 50 multiplied by 2(mm) into a cross shape, wherein the length of the two square pipes formed by welding is set to be 1770 mm;
thirdly, finding out the circle center of the chimney steel inner cylinder at the cross center of two square pipes with the size of 100 multiplied by 50 multiplied by 2(mm) which are formed by welding, respectively releasing two circular big samples at positions which extend outwards and have the diameter of 1530mm and the diameter of 1670mm by taking the cross center of the outer edge surface of the square pipe with the size of 100 multiplied by 50 multiplied by 2(mm) as the circle center, and respectively welding phi 20 round steel with the length of 100mm at the gap between every two circular big samples to form the limit of the chimney steel inner cylinder;
fourthly, welding a square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm at the center of the cross, and vertically welding and forming the square tube at the center of the cross to form a lifting force application assembly of the chimney steel inner cylinder lifting support;
fifthly, welding phi 20 round steel with the length of 1830mm on each side surface of the square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm for connecting the square tube with the length of 50 multiplied by 2(mm) and the base so as to enhance the stability of the chimney steel inner cylinder hoisting support;
and sixthly, welding a U-shaped hanging ring on the top of the square tube with the length of 50 multiplied by 2(mm) and the length of 2500mm to form a force application assembly connected with external hoisting equipment.
10. The chimney steel inner cylinder hoisting construction method according to claim 9, characterized in that: the square pipe with the size of 100 multiplied by 50 multiplied by 2(mm), the phi 20 round steel with the length of 100mm, the square pipe with the size of 50 multiplied by 2(mm) and the phi 20 round steel with the length of 1830mm and the U-shaped hanging ring are all prepared by leftover materials.
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CN114233089A (en) * | 2021-12-30 | 2022-03-25 | 桐玉建设集团有限公司 | Novel chimney steel inner cylinder hoisting support and construction method thereof |
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CN114233089A (en) * | 2021-12-30 | 2022-03-25 | 桐玉建设集团有限公司 | Novel chimney steel inner cylinder hoisting support and construction method thereof |
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Application publication date: 20211029 |