阅读说明：本技术 转炉节能环保改造中的大型汽包吊装方法 (Large steam drum hoisting method in converter energy-saving and environment-friendly reconstruction ) 是由 王天宇 汪群 吕成刚 于 2019-10-23 设计创作，主要内容包括：本发明涉及机械设备安装施工技术领域,尤其涉及一种转炉节能环保改造中的大型汽包吊装方法,其特征在于,其具体施工步骤如下：1)临时吊运措施；2)临时平台措施；3)汽包安装。与现有技术相比,本发明的有益效果如下：借助转炉环保改造的现场环境条件,首先对厂房屋面梁进行加固使之具有足够的强度,然后根据待吊装汽包的重量配置电动葫芦吊轨道,根据汽包的结构特点设置合理安全的起吊作业力点和起吊方向,配合卷扬机完成汽包的吊装作业,操作过程安全可控,完美地解决了狭小施工空间内大型设备的安装难题。(The invention relates to the technical field of mechanical equipment installation and construction, in particular to a large-scale steam drum hoisting method in converter energy-saving and environment-friendly transformation, which is characterized by comprising the following specific construction steps: 1) temporary hoisting measures are taken; 2) temporary platform measures; 3) and (5) installing a steam drum. Compared with the prior art, the invention has the following beneficial effects: by means of the field environment condition of converter environmental protection transformation, the roof beam of the factory building is firstly reinforced to have enough strength, then the electric hoist lifting track is configured according to the weight of the steam drum to be lifted, reasonable and safe lifting operation force points and lifting directions are set according to the structural characteristics of the steam drum, the lifting operation of the steam drum is completed by matching with a winch, the operation process is safe and controllable, and the difficult problem of installation of large equipment in a narrow construction space is perfectly solved.)

1. The large steam drum hoisting method in the energy-saving and environment-friendly transformation of the converter is characterized by comprising the following specific construction steps:

1) the temporary hoisting measures comprise planning a moving route according to the factory entering position and the installation position of a steam drum, building the temporary measures, reinforcing a roof girder, connecting reinforcing diagonal braces between two ends of the roof girder and a stand column, installing two parallel crane rail seats below the roof girder, connecting crane rails below the crane rail seats, hanging electric hoist cranes on the crane rails, arranging at least two 16t electric hoist cranes on each rail, connecting the two electric hoist cranes by using steel belts, and enabling the length of the steel belts to be 8-9 meters; two rows of electric hoist cranes on the two crane rails synchronously move under the traction of the windlass;

2) the temporary platform measure is that a first winch is arranged on a column 1-2 on a platform with the length of 50m, a second winch is arranged on a column 2-4, the first winch and the second winch are opposite in position, two sections of track flat trailers which are connected together and are convenient for transporting steam drums and pipelines are manufactured and installed between the column 1-2 and the column 2-4 and between the column 2-3 and the column 2-7, and a third winch is arranged on a column 2-8;

3) the steam pocket is installed, the steam pocket enters a platform of +50m from an elevator port by utilizing two 32t traveling cranes, one end of the steam pocket is tied by a dual-purpose steel wire rope of a winch, one end of the steam pocket is slowly placed on a rail flat trailer, the steel wire rope of the traveling crane No. 1 is separated, the position of the steam pocket is slowly adjusted by utilizing the first winch and the second winch, the steam pocket is integrally placed on the rail flat trailer, the steel wire rope of the traveling crane No. 2 is separated, the steam pocket is pulled to a position of 2-3 columns by utilizing the second winch, the steam pocket is slowly hoisted by utilizing four 16t electric hoist cranes, the steam pocket is horizontally moved to the position of 2-7 columns, and the steam pocket is hoisted to the platform of +54m to be.

2. The large-sized steam drum hoisting method in the energy-saving and environment-friendly reconstruction of the converter according to claim 1, characterized in that the rail platform trailer is formed by welding channel steel and/or H-shaped steel.

3. The method for hoisting the large steam pocket in the energy-saving and environment-friendly reconstruction of the converter according to claim 1, wherein the roof girder is reinforced by arranging at least one pair of wing plates at intervals of 8-12 m at two ribs of the H-shaped roof girder, and the wing plates are 25-30 mm thick and are respectively in full-weld connection with the two ribs of the I-shaped roof girder.

4. The large steam drum hoisting method in the energy-saving and environment-friendly reconstruction of the converter according to claim 1, wherein the crane rail seat is made of I-shaped steel, and reinforcing plates are arranged on two ribs.

Technical Field

The invention relates to the technical field of mechanical equipment installation and construction, in particular to a large steam drum hoisting method in converter energy-saving and environment-friendly transformation.

Background

The main content of the environmental protection reconstruction project of the 6# converter in a certain steel plant is to dismantle and install all equipment and pipelines contained in the original vaporization cooling system and the original flue gas purification system of the 6# converter. The construction range comprises: 1) dismounting and mounting the vaporization cooling system: dismantling and installing a waste heat boiler, removing a steam drum, installing, removing a deaerator, installing, dismantling a low-pressure circulating pump and a high-pressure circulating pump, installing, dismantling a boiler feed pump, installing, dismantling a system pipeline and installing; 2) dismantling and installing a flue gas purification system: and (4) dismantling and installing a secondary venturi tube, dismantling and installing a spray tower, dismantling and installing a cyclone dehydrator, dismantling and installing a system pipeline, and dismantling and installing the system pipeline.

The engineering construction is mainly characterized in that: the waste heat boiler, the steam pocket and the deaerator of the vaporization cooling system belong to the installation of special equipment, and especially the installation of the steam pocket belongs to the installation of a project with high risk; the spray tower, the secondary venturi tube, the cyclone dehydrator and other equipment in the flue gas purification system belong to large-scale equipment installation; hoisting in the installation process is a difficult point and a key point of the project.

According to the engineering construction method, the No. 6 converter is positioned between 201 columns and 203 columns in a steel plant, the distance from the No. 5 converter to the No. 5 converter is only 6.5m, and main equipment needing to be dismantled and installed is as follows: a steam drum, a deaerator, a cyclone dehydrator, a spray tower, a secondary venturi tube, a second hydraulic station, a flue tail section, a middle III section, a middle II section, a middle I section, a fixed section, a movable section and a smoke hood; the pipelines to be dismantled and installed are as follows: the vaporization cooling system pipeline, the flue gas purification system pipeline and the equipment protection steel structure are positioned between 2/E2 span and 2/E2 span in a plant, and no hoisting equipment above the vaporization cooling system pipeline and the flue gas purification system pipeline can be dismantled and installed only by means of temporary measures such as winding, pulleys and the like.

The weight of the equipment for dismounting and mounting at this time is about 20t, the weight of the steam drum is about 60t, the weight of the deaerator and the primary oxygen tank is about 30t, the deaerator and the primary oxygen tank are required to be dismounted firstly and then mounted sequentially due to the narrow construction site, the deaerator of the vaporization cooling system is mounted firstly, and then the equipment and the pipeline of the flue gas purification system are mounted; the steam drum is installed firstly, and then the flue is installed. How to reasonably, quickly and safely realize the dismantling and installation of the waste heat boiler in a limited space has no existing construction method for reference, and a plurality of difficulties need to be overcome.

Disclosure of Invention

The invention aims to provide a large-scale steam drum hoisting method in converter energy-saving environment-friendly transformation, which overcomes the defects of the prior art, reinforces a roof beam of a factory building to have enough strength aiming at the site environment condition of the converter environment-friendly transformation, configures an electric hoist hoisting track according to the weight of a steam drum to be hoisted, sets a reasonable and safe hoisting operation force point and hoisting direction according to the structural characteristics of the steam drum, completes single-weight 60t steam drum hoisting operation in the sequence from top to bottom by using platform height difference on site by means of hoisting equipment, has small influence on the environment in the construction process, and is safe and controllable in the operation process.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the large steam drum hoisting method in the energy-saving and environment-friendly transformation of the converter is characterized by comprising the following specific construction steps:

1) the temporary hoisting measures comprise planning a moving route according to the factory entering position and the installation position of a steam drum, building the temporary measures, reinforcing a roof girder, connecting reinforcing diagonal braces between two ends of the roof girder and a stand column, installing two parallel crane rail seats below the roof girder, connecting crane rails below the crane rail seats, hanging electric hoist cranes on the crane rails, arranging at least two 16t electric hoist cranes on each rail, connecting the two electric hoist cranes by using steel belts, and enabling the length of the steel belts to be 8-9 meters; two rows of electric hoist cranes on the two crane rails synchronously move under the traction of the windlass;

2) the temporary platform measure is that a first winch is arranged on a column 1-2 on a platform with the length of 50m, a second winch is arranged on a column 2-4, the first winch and the second winch are opposite in position, two sections of track flat trailers which are connected together and are convenient for transporting steam drums and pipelines are manufactured and installed between the column 1-2 and the column 2-4 and between the column 2-3 and the column 2-7, and a third winch is arranged on a column 2-8;

3) the steam pocket is installed, the steam pocket enters a platform of +50m from an elevator port by utilizing two 32t traveling cranes, one end of the steam pocket is tied by a dual-purpose steel wire rope of a winch, one end of the steam pocket is slowly placed on a rail flat trailer, the steel wire rope of the traveling crane No. 1 is separated, the position of the steam pocket is slowly adjusted by utilizing the first winch and the second winch, the steam pocket is integrally placed on the rail flat trailer, the steel wire rope of the traveling crane No. 2 is separated, the steam pocket is pulled to a position of 2-3 columns by utilizing the second winch, the steam pocket is slowly hoisted by utilizing four 16t electric hoist cranes, the steam pocket is horizontally moved to the position of 2-7 columns, and the steam pocket is hoisted to the platform of +54m to be.

The rail platform trailer is formed by welding channel steel and/or H-shaped steel.

The reinforcing method of the roof girder is that at least one pair of wing plates is arranged at two ribs of the H-shaped roof girder every 8-12 meters, and the wing plates are 25-30 mm thick and are respectively in full-welding connection with the two ribs of the I-shaped roof girder.

The crane track seat is made of I-shaped steel, and reinforcing plates are arranged on two ribs.

Compared with the prior art, the invention has the following beneficial effects: by means of the field environment condition of converter environmental protection transformation, the roof beam of the factory building is firstly reinforced to have enough strength, then the electric hoist lifting track is configured according to the weight of the steam drum to be lifted, reasonable and safe lifting operation force points and lifting directions are set according to the structural characteristics of the steam drum, the lifting operation of the steam drum is completed by matching with the traction of a winch, the operation process is safe and controllable, and the difficult problem of installation of large-scale equipment in a narrow construction space is perfectly solved.

Drawings

FIG. 1 is a schematic block diagram of the location relationship of the demolition equipment of the present invention.

Fig. 2 is a schematic view of a roof girder reinforcing structure according to the invention.

Fig. 3 is a schematic view of the installation of the double-track parallel spreader of the present invention.

Fig. 4 is a schematic view of a temporary platform arrangement of the present invention.

Fig. 5 is a schematic diagram of the drum feed location of the present invention.

Fig. 6 is a schematic view of the turning around of the steam drum of the present invention.

Fig. 7 is a schematic diagram of the change of the steam drum hoisting space of the invention.

In the figure: 1-wing plate, 2-reinforcing diagonal brace, 3-roof beam, 4-crane rail seat, 5-crane rail, 6-electric hoist crane, 7-steel belt, 8-steam drum, 9-first winch, 10-second winch, 11-third winch, 12-rail flat trailer and 13-steam drum installation area.

Detailed Description

The following examples are presented to further illustrate embodiments of the present invention:

in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-7, the structural schematic diagram of an embodiment of the large steam drum hoisting method in the energy-saving and environment-friendly transformation of the converter of the invention is shown, and the specific steps are as follows: 1) and (2) temporary hoisting measures, planning a moving route according to the factory entry position and the installation position of the steam drum, and reinforcing the roof girder, wherein the reinforcing method of the roof girder is that at least one pair of wing plates 1 made of delta 30 steel plates is arranged at two ribs of the roof girder every 8-12 meters, and the thickness of each wing plate 1 is 25-30 mm and is respectively in full-welding connection with the two ribs of the I-shaped roof girder. And a reinforcing inclined strut 2 made of 16# channel steel is connected between the two ends of the roof girder and the upright column.

Two parallel crane rail seats 4 are arranged under the roof girder 3, the crane rail seats are made of I56a I-steel, and reinforcing plates are arranged on two ribs. A crane rail 5 is connected below a crane rail seat, and a 10# channel steel is used for reinforcing the connection position of the crane rail 5. Two 16t electric block hoists 6 are arranged on each crane track, the two electric block hoists are connected through a steel belt 7, the length of the steel belt is 8-9 meters, the two rows of electric block hoists on the two crane tracks can move synchronously under the traction of a winch, the structure is suitable for hoisting a 12-meter steam pocket 8, and accidents caused by overturning of equipment due to unstable gravity centers due to too close hoisting points can be avoided.

2) The temporary platform measures that the elevator is used as an elevator port for converter transformation between 1-1 column and 1-3 columns of a platform with the height of +50m, and the weight of the steam pocket monomer installed at the time is about 60 t. A first winch 9 is arranged on a column 1-2 on a platform of 50m, a second winch 10 is arranged on a column 2-4, the first winch is opposite to the second winch, two sections of rails which are connected together and are convenient for transporting a steam drum and a pipeline are manufactured and installed between the column 1-2 and the column 2-4 and between the column 2-3 and the column 2-7, the rails are used for facilitating the running of a rail flat trailer 12, the rail flat trailer 12 is formed by welding channel steel and H-shaped steel and provides sufficient strength and flatness, and a third winch 11 is arranged on the column 2-8 and used for drawing the steam drum 8 to move.

3) The steam pocket is installed, the steam pocket is hoisted to a platform of +50m after entering a factory through an elevator entrance by two 32t traveling cranes, one end of the steam pocket 8 is tied by a second winch 10 through a steel wire rope, one end of the steam pocket is slowly placed on a rail flat trailer 12, the steel wire rope of the traveling crane No. 1 is released, the position of the steam pocket 8 is slowly adjusted by the first winch 9 and the second winch, the whole steam pocket is placed on the rail flat trailer 12, the steel wire rope of the traveling crane No. 2 is released, the steam pocket is pulled to a 2-3 column by the second winch 10, the steam pocket is slowly hoisted by four 16t electric hoists 6, the steam pocket is horizontally moved to a 2-7 column position, the steam pocket is lifted to the platform of +54m, and the steam pocket can be installed in place to a steam pocket installation area 13.

The invention is mainly characterized in that reasonable and safe lifting operating force points and lifting directions are set according to the structural characteristics of the steam pocket, two 32t traveling cranes, three winches and four 16t electric block cranes are arranged adjacently and spanned, the operation of entering the steam pocket, turning around, lifting and positioning is completed, the space operation efficiency is high, the operation process is safe and controllable, and the construction problem of large equipment in a narrow construction space commonly existing in the industry is solved.

The above embodiments are merely specific examples selected for illustrating the objects, technical solutions and advantages of the present invention in detail, and should not be construed as limiting the scope of the present invention, and various modifications, equivalent substitutions and improvements can be made without departing from the spirit and principle of the present invention.