CN113048461A - High-altitude assembly and installation device for boiler membrane type water-cooled wall and installation method thereof - Google Patents
High-altitude assembly and installation device for boiler membrane type water-cooled wall and installation method thereof Download PDFInfo
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- CN113048461A CN113048461A CN202110333228.2A CN202110333228A CN113048461A CN 113048461 A CN113048461 A CN 113048461A CN 202110333228 A CN202110333228 A CN 202110333228A CN 113048461 A CN113048461 A CN 113048461A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
- F22B37/201—Suspension and securing arrangements for walls built-up from tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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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
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
- B66C1/14—Slings with hooks
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- Mechanical Engineering (AREA)
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- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to an overhead mounting process of a boiler membrane water-cooled wall, in particular to an overhead assembling and mounting device of the boiler membrane water-cooled wall and a mounting method thereof, which comprises a hanging device component, an upper section water-cooled wall group, a lower section water-cooled wall group, an upper section rigid beam, a lower section rigid beam, an upper section lifting lug component, a lower section lifting lug component, a chain block and a working platform component, the upper section water-cooling wall group is arranged at the lower part of the hanging device component and is connected with the hanging device component, the sectional water-cooled wall in the high-altitude assembly and installation method of the boiler membrane water-cooled wall provided by the invention has the advantages of smaller size, smaller weight and safer and more convenient hoisting, and greatly meets the installation and use requirements of installation engineering enterprises on the boiler membrane water-cooled wall.
Description
Technical Field
The invention relates to a high-altitude installation process of a boiler membrane water-cooled wall, in particular to a high-altitude assembly installation device and an installation method of the boiler membrane water-cooled wall.
Background
The water-cooled wall is the main heated part of the boiler, and is composed of a plurality of rows of steel pipes and distributed around the hearth of the boiler. The inside of the furnace is flowing water or steam, and the outside receives the heat of the flame of the boiler furnace. Mainly absorbs the radiation heat of high-temperature combustion products in the hearth, and the working medium rises in the hearth and is heated and evaporated. The membrane type water-cooled wall is formed by welding a plurality of rolled water-cooled wall finned tubes together by spot welding to form a sealed combined heating surface, so that the air tightness of a hearth can be improved, air leakage is reduced, a furnace wall can be better protected, the weight of the furnace wall is reduced, and the structure is simplified; the water cooling wall of the bayonet tube is formed by welding a plurality of pins with the length of 20-25 mm and the diameter of 6-12 mm on a water cooling wall tube, and then coating chromium ore fire-resistant plastic on the pins so as to reduce the heat absorption capacity of the part of the water cooling wall and improve the temperature of a combustion area.
The water-cooled wall in the large and medium power station boiler is a final heating surface and has the characteristics of large size, heavy weight, high installation height and the like.
Disclosure of Invention
The invention aims to provide a high-altitude assembly and installation device and an installation method for a membrane water-cooled wall of a boiler.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-altitude assembly and installation device for a membrane type water-cooled wall of a boiler comprises a hanging device component, an upper section water-cooled wall group, a lower section water-cooled wall group, an upper section rigid beam, a lower section rigid beam, an upper section lifting lug component, a lower section lifting lug component, a chain block and an operation platform component, the upper section water-cooling wall group is arranged at the lower part of the hanging device component and is connected with the hanging device component, the upper section rigid beam is arranged on the side surface part of the upper section water cooling wall group and is fixedly connected with the upper section water cooling wall group, the lower section rigid beam is arranged on the side part of the lower section water cooling wall group and is fixedly connected with the lower section water cooling wall group, the upper section water-cooling wall group is provided with an upper section lifting lug assembly, the lower section water-cooling wall group is provided with a lower section lifting lug assembly, the upper section lifting lug assembly is connected with the lower section lifting lug assembly through a chain block, and the operation platform component is installed on the lower section water-cooling wall group and is connected with the lower section water-cooling wall group.
The upper section lifting lug assembly and the lower section lifting lug assembly are used for being connected with a chain block in a hanging mode, and the upper section lifting lug assembly and the lower section lifting lug assembly are formed by the same structure.
The upper section lifting lug assembly and the lower section lifting lug assembly comprise a lifting lug mounting frame, a lifting lug mounting stud, a lifting lug body, an adjusting nut, a retaining spring and a positioning pin, wherein the lifting lug mounting frame is a square frame structure body, the lifting lug mounting stud is arranged in the lifting lug mounting frame and is fixedly connected with the lifting lug mounting frame, the center part of the lifting lug body is provided with a mounting through hole, the lifting lug body is arranged on the lifting lug mounting stud through the mounting through hole, the retaining spring penetrates through the lifting lug mounting stud, one side end part of the retaining spring is arranged on the inner side wall of the lifting lug mounting frame and is fixedly connected with the inner side wall of the lifting lug mounting frame, the other side end part of the retaining spring is contacted with the side surface of the lifting lug body, the outer peripheral wall of the lifting lug mounting stud is structurally provided with external threads, the adjusting nut is arranged on the lifting lug mounting stud, one side end part of the positioning pin is arranged on the inner side wall of the lifting lug mounting frame and is fixedly connected with the inner side wall of the lifting lug mounting frame, and a chain block hanging hole is processed on the lifting lug body.
The lifting lug body is provided with positioning pin limiting insertion holes for limiting the positioning pins, and the positioning pin limiting insertion holes are uniformly distributed on the lifting lug body.
The upper section water-cooled wall group and the lower section water-cooled wall group have the same structure and mainly comprise a water-cooled wall header, water-cooled wall tubes and fins, wherein the fins are arranged between every two adjacent water-cooled wall tubes and are fixedly connected with the water-cooled wall tubes, the water-cooled wall header is arranged on the end part of one side of each water-cooled wall tube and is communicated with the water-cooled wall tubes, and rectangular holes for installing an upper section lifting lug assembly and a lower section lifting lug assembly are processed on the fins.
The hanging device component mainly comprises a boiler top plate beam, a connecting screw rod and an adjusting nut, wherein a through hole is processed in the boiler top plate beam, the connecting screw rod penetrates through the through hole in the boiler top plate beam, the adjusting nut is installed on the upper portion of the connecting screw rod and is connected with the connecting screw rod in a threaded fit mode, and the bottom of the connecting screw rod is connected with a water-cooled wall header in an upper water-cooled wall group.
A method for installing a boiler membrane water-cooled wall high-altitude assembly installation device mainly comprises the following steps:
s1, water wall subsection pairing
S11, on a prefabricated platform, assembling small sections of water-cooled walls into designed upper and lower sections according to boiler drawings and numbers, respectively rechecking the sizes of the upper and lower sections of water-cooled walls, performing spot welding according to a welding process card, and then performing water-cooled wall tube welding, wherein the weld seam is qualified through nondestructive testing;
s2 lifting lug and chain block arrangement for upper section water cooling wall group
S21, after the welding of the upper section water-cooling wall group is qualified through nondestructive testing, arranging butt hoisting lifting lugs and chain blocks on the fins above the butt position of the lower section water-cooling wall group along the width direction of the water-cooling wall in a distributed mode;
s22, calculating the hoisting calculation load of the lower water-cooling wall group according to the sum of the weight of the lower water-cooling wall group, the weight of the operation platform, the weight of the operation personnel and the weight of the hoisting rigging;
s23, determining the number of hoisting chain blocks and the rated load-lifting capacity of the chain blocks according to the calculated load mode that the number of the hoisting chain blocks multiplied by the rated load-lifting capacity of the chain blocks is larger than that of the hoisting of the lower section water wall;
s24, calculating and selecting the thickness of the steel plate used by the butt-joint lifting lug according to the calculated load of the lower water-cooling wall group and the number of chain blocks;
s25, cutting rectangular holes at the fins at the positions where the chain blocks are arranged, inserting lifting lugs into the holes, and firmly welding the fins and the peripheries of two surfaces of the lifting lugs;
s26, hooking the chain block which is checked to be abnormal on a plate hole of the lifting lug;
s3, pre-storing the upper water wall group
S31, hoisting the assembled upper water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the furnace reserved opening by using a small-tonnage crane configured on site for a long time, and fixing the pre-stored upper water-cooling wall groups firmly by adopting temporary fixing measures;
s4, hoisting the upper section water cooling wall group in place and installing
S41, hoisting an upper section water-cooling wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding hoisting rigging of the upper section water-cooling wall group on a header at the upper part of the water-cooling wall;
s42, checking whether the lifting lugs and the chain blocks for lifting the upper section water-cooling wall group are abnormal or not, checking to ensure that the hanging devices on the top plate beam of the water-cooling wall to be lifted are installed in place, and fully configuring the connecting pieces in place;
s43, when the upper section water-cooling wall group is hoisted to be close to the hanging device at the upper part of the boiler, the upper section water-cooling wall group is hoisted to the height slowly and is connected with the hanging device at the upper header, and after the hanging devices are all connected and checked, the crane hook can be loosened;
s5, setting lifting lugs of lower water-cooling wall group and installing aerial work platform
S51, after the welding of the lower water-cooling wall group is qualified through nondestructive testing, the lower water-cooling wall group is vertically connected with the butt hoisting lug of the upper water-cooling wall group and the chain block correspondingly, and the butt hoisting lug of the lower water-cooling wall group is arranged below the butt position of the water-cooling wall;
s52, manufacturing the opposite-opening hoisting lug of the lower section water cooling wall group, wherein the manufacturing of the opposite-opening hoisting lug of the lower section water cooling wall group is the same as that of the upper section water cooling wall group, cutting a rectangular hole at a fin at the position where the chain block is arranged, inserting the hoisting lug into the hole, and firmly welding the fin and the periphery of two surfaces of the hoisting lug;
s53, arranging an aerial work platform on the lower section water-cooling wall group below the position opposite to the upper section water-cooling wall group;
s54, the aerial work platform is hooked on the fins of the lower water cooling wall group, and the work platform is provided with a reliable walkway gangway and a safety railing;
s6, pre-storing and hoisting lower water-cooling wall group in place
S61, hoisting the assembled lower water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the reserved openings of the furnace by using a small-tonnage crane configured on site for a long time, and pre-storing the lower water-cooling wall groups by adopting temporary fixing measures;
s62, hoisting a lower water-cooling wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding a hoisting rigging of the lower water-cooling wall group on a plate hole on one side of a lifting lug of the lower water-cooling wall group;
s63, checking and ensuring that the corresponding positions of the lower water-cooling wall group, the lifting lug for lifting and the operation platform are correct, safe and reliable;
s64, when the lower section water-cooling wall group is hoisted to the opening aligning height close to the upper section water-cooling wall group, hanging the inverted chain hung on the upper section water-cooling wall group on the lifting lug plate hole of the lower section water-cooling wall group, and synchronously and slowly hoisting the inverted chain to the opening aligning height;
s7, butt joint, welding and nondestructive testing of upper section water cooling wall group and lower section water cooling wall group
S71, according to the size and the position deviation of the aligning gap between the upper section water cooling wall group and the lower section water cooling wall group, the chain block at the corresponding position is pulled up or pulled down to further adjust the aligning position and the aligning gap;
s72, when the butt joint position and the butt joint gap meet the standard requirements, spot welding and welding are carried out according to the welding process card;
and S73, carrying out weld joint nondestructive testing according to the drawing of the welding boiler and the electrical construction specification requirements.
Further, in the step S21, after the welding of the upper water-cooled wall group is qualified through nondestructive testing, aligning lifting lugs and inverted chains are distributed on the fins at a height of 1.0 to 1.5 meters above the aligning position of the lower water-cooled wall group along the width direction of the water-cooled wall.
Further, in step S24, a steel plate with a thickness of more than 16mm is used for the mouth-hanging lifting lug.
Further, in step S25, a rectangular hole is cut at the fin where the chain block is located, in a direction inclined by 20 ° with respect to the ear.
Further, in the step S51, a lower water-cooled wall group opening-aligning lifting lug is arranged at a height position of 0.8-1.0 m below the opening-aligning position of the water-cooled wall.
Further, in step S53, an aerial work platform is provided on the lower water-cooled wall group 1.2 to 1.5 meters below the position of the opening of the upper water-cooled wall group.
Further, in step S54, the work platform supports should be uniformly distributed at the fixing points of the fins, and the distance between every two adjacent fixing points is not greater than 2 meters.
The invention has the beneficial effects that: the high-altitude assembly and installation method of the boiler membrane water-cooled wall provided by the invention is characterized in that an upper water-cooled wall group and a lower water-cooled wall group are assembled in a segmented manner on a ground prefabricated platform, then the upper water-cooled wall group and the lower water-cooled wall group are assembled into an integral sheet in the air through the combination of lifting equipment and adjustment of chain blocks and lifting lugs on the upper water-cooled wall group and the lower water-cooled wall group, so that the area of the ground prefabricated platform and the tonnage of large-area scaffolds are greatly reduced, the construction efficiency is improved, the integral construction cost is effectively reduced, the segmented water-cooled wall in the high-altitude assembly and installation method of the boiler membrane water-cooled wall is smaller in size and smaller in weight, the lifting is safer and more convenient, and the installation and use requirements of installation engineering enterprises on the boiler membrane water-cooled wall are greatly met.
Drawings
FIG. 1 is a schematic diagram of a lifting lug and a chain block for lifting arranged on an upper section water-cooled wall assembly in the invention;
FIG. 2 is a schematic diagram of a lifting lug and a chain block for lifting arranged on a lower section water wall assembly in the invention;
FIG. 3 is a schematic structural view of an integral hoisting structure of the upper section water-cooling wall assembly and the lower section water-cooling wall assembly during hoisting;
FIG. 4 is a schematic diagram of an integral hoisting side view structure of the upper section water-cooling wall group and the lower section water-cooling wall group during hoisting of the invention;
FIG. 5 is a first structural schematic diagram of the upper and lower shackle assemblies of the present invention;
FIG. 6 is a second structural view of the upper and lower shackle assemblies of the present invention;
FIG. 7 is a schematic view of the hanger component of the present invention;
FIG. 8 is a main process flow diagram of the boiler membrane wall high altitude assembly installation apparatus of the present invention;
the reference numbers in the figures are: 1-upper section rigid beam, 2-lower section rigid beam, 3-upper section lifting lug assembly, 4-lower section lifting lug assembly, 5-inverted chain, 6-operation platform component, 7-lifting lug mounting rack, 8-lifting lug mounting stud, 9-lifting lug body, 10-adjusting nut, 11-retaining spring, 12-positioning pin, 13-mounting through hole, 14-inverted chain hanging hole, 15-water wall header, 16-water wall pipe, 17-fin, 18-boiler roof plate beam, 19-connecting screw, 20-adjusting nut, 21-butt joint position and 22-positioning pin limiting insertion hole.
Detailed Description
Specific example 1: the technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that: in the present invention, all the embodiments and preferred methods mentioned herein can be combined with each other to form a new technical solution, if not specifically stated. In the present invention, all the technical features mentioned herein and preferred features may be combined with each other to form a new technical solution, if not specifically stated. In the present invention, the components referred to or the preferred components thereof may be combined with each other to form a novel embodiment, if not specifically stated. In the present invention, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "1.5 to 2.5" means that all real numbers between "1.5 to 2.5" have been listed herein, and "1.5 to 2.5" is only a shorthand representation of the combination of these values. The "ranges" disclosed herein may have one or more lower limits and one or more upper limits, respectively, in the form of lower limits and upper limits. In the present invention, unless otherwise specified, the individual reactions or operation steps may be performed sequentially or may be performed in sequence. Preferably, the reaction processes herein are carried out sequentially. Unless otherwise defined, technical and scientific terms used herein have the same meaning as is familiar to those skilled in the art. In addition, any methods or materials similar or equivalent to those described herein can also be used in the present invention. In order to solve the problems of large prefabricated platform area, high integral construction cost, high requirement on lifting mechanical performance tonnage and high construction mechanical cost of a water-cooled wall in the existing large and medium power station boiler in the construction process, the invention provides a boiler membrane water-cooled wall high-altitude assembly installation device and an installation method thereof, and particularly relates to a boiler membrane water-cooled wall high-altitude assembly installation device which mainly comprises a hanging device component, an upper section water-cooled wall group, a lower section water-cooled wall group, an upper section rigid beam 1, a lower section rigid beam 2, an upper section lifting lug component 3, a lower section lifting lug component 4, a chain block 5 and an operation platform component 6, wherein the upper section water-cooled wall group for butting the lower section water-cooled wall group is installed at the lower part of the hanging device component, and the upper section rigid beam 1 for transversely and stably welding the upper section water-cooled wall group at the side part of the upper section water-cooled wall group, the lower section rigid beam 2 used for transversely stabilizing the lower section water-cooled wall group is welded at the side part of the lower section water-cooled wall group, the upper section water-cooled wall group and the lower section water-cooled wall group have the same structure and mainly comprise a water-cooled wall header 15, water-cooled wall tubes 16 and fins 17, the fins 17 are welded at the position between every two adjacent water-cooled wall tubes 16, the water-cooled wall header 15 is arranged at the position of one side end part of the water-cooled wall tubes 16 and is communicated with the water-cooled wall tubes 16, rectangular holes used for installing the upper section lifting lug assembly 3 and the lower section lifting lug assembly 4 are processed on the fins 17, the upper section lifting lug assembly 3 and the lower section lifting lug assembly 4 are welded in the rectangular holes, the upper section lifting lug assembly 3 and the lower section lifting lug assembly 4 are used for hanging and connecting the inverted chain 5, the upper section lifting lug assembly 3 and the lower section lifting lug assembly 4 have the, A lifting lug mounting stud 8, a lifting lug body 9, an adjusting nut 10, a holding spring 11 and a positioning pin 12, wherein the lifting lug mounting rack 7 is a square frame structure body, the lifting lug mounting stud 8 is fixedly arranged in the frame structure of the lifting lug mounting rack 7, a mounting through hole 13 is arranged at the central part of the lifting lug body 9, the diameter of the mounting through hole 13 is larger than that of the lifting lug mounting stud 8, the lifting lug body 9 is arranged on the lifting lug mounting stud 8 through the mounting through hole 13 and is not contacted with the lifting lug mounting stud 8, the holding spring 11 for holding the space position of the lifting lug body 9 penetrates through the lifting lug mounting stud 8, one end part of the holding spring 11 is fixedly arranged on the inner side wall of the lifting lug mounting rack 7, the other end part of the holding spring 11 is contacted with the side surface of the lifting lug body 9, an external thread is structured on the peripheral wall of the lifting lug mounting stud 8, one side end part of a positioning pin 12 for positioning the lifting lug body 9 is welded on the inner side wall of the lifting lug mounting frame 7, chain-reversing hanging holes 14 for connecting and hanging the chain-reversing 5 are processed at two ends of the lifting lug body 9, when the structure of the upper lifting lug assembly 3 and the lower lifting lug assembly 4 is used, the lifting lug body 9 can be subjected to angle adjustment relative to the lifting lug mounting frame 7, specifically, the adjusting nut 10 is rotated anticlockwise, the adjusting nut 10 moves leftwards on the lifting lug mounting stud 8, at the moment, the holding spring 11 pushes the lifting lug body 9 to move leftwards, at the moment, the positioning pin 12 leaves a positioning pin limiting insertion hole 22 on the lifting lug body 9, at the moment, the positioning pin 12 relieves the rotation limit on the lifting lug body 9, an operator can adjust the angle between the lifting lug body 9 and the Y-axis in the vertical direction, and further, the lifting lug body 9 can be conveniently, when the lifting lug structure is used, the optimal inclination angle of the lifting lug body 9 and the vertical direction of the Y axis is 20 degrees, after the angle is adjusted in place, the adjusting nut 10 is rotated clockwise to push the lifting lug body 9 to move rightwards, at the moment, the positioning pin 12 is inserted into the positioning pin limiting insertion hole 22 on the lifting lug body 9 to restore the limiting of the rotation direction of the lifting lug body 9, and the operation platform component 6 for supporting the operation of an operator is installed on the lower section water cooling wall group.
As shown in the attached figure 8 of the specification, the method for installing the boiler membrane water wall high-altitude assembly installation device mainly comprises the following steps:
s1, water wall subsection pairing
S11, on a prefabricated platform, assembling small sections of water-cooled walls into designed upper and lower sections according to boiler drawings and numbers, respectively rechecking the sizes of the upper and lower sections of water-cooled walls, performing spot welding according to a welding process card, and then welding the water-cooled wall tubes 16, wherein the weld joints are qualified through nondestructive testing;
s2, arranging lifting lugs (namely the upper-section lifting lug assembly 3) and the chain block 5 of the upper-section water-cooling wall assembly
S21, after the welding of the upper section water-cooling wall group is qualified through nondestructive testing, arranging butt hoisting lugs (referring to an upper section lifting lug assembly 3) and a chain block 5 on fins 17 which are 1.0-1.5 meters above a butt position 21 of the lower section water-cooling wall group and have the height along the width direction of the water-cooling wall;
s22, calculating the hoisting calculation load of the lower water-cooling wall group according to the sum of the weight of the lower water-cooling wall group, the weight of the operation platform, the weight of the operation personnel, the weight of the hoisting rigging and the like multiplied by the (1.2 dynamic load coefficient + 1.2 unbalanced coefficient);
s23, determining the number of hoisting chain blocks 5 and the rated load lifting capacity of the chain blocks 5 according to the calculated load mode that the number of the hoisting chain blocks multiplied by the rated load lifting capacity of the chain blocks is larger than that of the hoisting of the lower section water wall;
s24, calculating and selecting the thickness of the steel plate used by the butt-joint lifting lug (the upper lifting lug assembly 3) according to the calculated load of the lower water-cooled wall group and the number of the chain blocks 5, and manufacturing the steel plate with the thickness of more than 16mm used by the butt-joint lifting lug (the upper lifting lug assembly 3) under the general condition;
s25, cutting rectangular holes at the fins 17 at the positions of the inverted chains 5 (the fins 17 at the positions of the inverted chains are cut into the rectangular holes in the direction that lifting lugs (refer to the upper lifting lug assemblies 3) incline by 20 degrees), inserting the lifting lugs (refer to the upper lifting lug assemblies 3) into the holes, and firmly welding the fins 17 and the peripheries of two surfaces of the lifting lugs (refer to the upper lifting lug assemblies 3);
s26, hooking the inverted chain 5 which is checked to be abnormal on a plate hole (inverted chain hanging hole 14) of the lifting lug (the upper lifting lug assembly 3);
s3, pre-storing the upper water wall group
S31, hoisting the assembled upper water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the furnace reserved opening by using a small-tonnage crane configured on site for a long time, and fixing the pre-stored upper water-cooling wall groups firmly by adopting temporary fixing measures;
s4, hoisting the upper section water cooling wall group in place and installing
S41, hoisting an upper-section water-cooled wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding hoisting rigging of the upper-section water-cooled wall group on an upper header (referred to as a water-cooled wall header) of the water-cooled wall;
s42, checking whether lifting lugs (the upper lifting lug component 3) for lifting the upper water-cooling wall group and the chain block 5 are abnormal or not, checking to ensure that a hanging device on a water-cooling wall top plate beam (the boiler top plate beam 18) to be lifted is installed in place, and fully configuring connecting pieces in place;
s43, when the upper section water-cooling wall group is hoisted to be close to the hanging device at the upper part of the boiler, the upper section water-cooling wall group is hoisted to the height slowly and is connected with the hanging device at the upper header, and after the hanging devices are all connected and checked, the crane hook can be loosened;
s5, setting lifting lugs of lower water-cooling wall group (setting of lower lifting lug component), and mounting aerial work platform
S51, after the welding of the lower water-cooling wall group is qualified through nondestructive testing, the lower water-cooling wall group is welded with the butt-joint hoisting lug of the upper water-cooling wall group and the inverted chain in the vertical direction, and the butt-joint hoisting lug (referring to a lower hoisting lug assembly 4) of the lower water-cooling wall group is arranged at the height position of 0.8-1.0 meter below the butt-joint position of the water-cooling wall;
s52, manufacturing a lower water-cooling wall group butt-joint hoisting lug (namely, a lower-section lug assembly 4) as the same as the lug (namely, an upper-section lug assembly 3) of an upper-section water-cooling wall group, cutting a rectangular hole at a fin 17 at the position where the chain block 5 is arranged, inserting the lug (namely, the lower-section lug assembly 4) into the hole, and firmly welding the fin 17 and the periphery of two sides of the lug (namely, the lower-section lug assembly 4);
s53, arranging an aerial work platform component 6 on the lower water-cooling wall group 1.2-1.5 meters below the position of the butt joint of the upper water-cooling wall group;
s54, the aerial work platform member 6 is hooked on the fins 17 of the lower section water cooling wall group, the work platform supports are uniformly distributed at the fixing points of the fins 17, the distance between every two adjacent fixing points is not more than 2m, and the work platform member 6 is provided with a reliable walkway springboard and a safety railing;
s6, pre-storing and hoisting lower water-cooling wall group in place
S61, hoisting the assembled lower water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the reserved openings of the furnace by using a small-tonnage crane configured on site for a long time, and pre-storing the lower water-cooling wall groups by adopting temporary fixing measures;
s62, hoisting a lower water-cooled wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding a hoisting rigging of the lower water-cooled wall group on a plate hole (a chain block hanging hole 14) on one side of a lower water-cooled wall group lifting lug (a lower lifting lug assembly 4);
s63, checking and ensuring that the corresponding positions of the lower water-cooling wall group, the lifting lug (the lower lifting lug assembly 4) for lifting and the operation platform are correct, safe and reliable;
s64, when the lower section water-cooling wall group is hoisted to the opening aligning height close to the upper section water-cooling wall group, hanging the inverted chain 5 hung on the upper section water-cooling wall group on a lifting lug plate hole (namely an inverted chain hanging hole) of the lower section water-cooling wall group, and synchronously and slowly hoisting the inverted chain 5 to the opening aligning height;
s7, butt joint, welding and nondestructive testing of upper section water cooling wall group and lower section water cooling wall group
S71, according to the size and the position deviation of the aligning gap between the upper section water cooling wall group and the lower section water cooling wall group, the chain block 5 at the corresponding position is pulled up or pulled down to further adjust the aligning position 21 and the aligning gap;
s72, when the butt joint position 21 and the butt joint gap meet the standard requirements, spot welding and welding are carried out according to the welding process card;
and S73, carrying out weld joint nondestructive testing according to the drawing of the welding boiler and the electrical construction specification requirements. The above-mentioned embodiments are merely preferred embodiments of the present invention, not limiting the scope of the present invention, and can be applied to other products with different structures in different fields, regardless of the center distance, the number of holes in the holes, and the size, so that all equivalent changes or modifications made according to the structure, features, and principles described in the present invention should be included in the scope of the present invention.
Claims (9)
1. A high-altitude assembly and installation device for membrane type water-cooled walls of boilers is characterized by comprising a hanging device component, an upper section water-cooled wall group, a lower section water-cooled wall group, an upper section rigid beam (1), a lower section rigid beam (2), an upper section lifting lug component (3), a lower section lifting lug component (4), a chain block (5) and an operation platform component (6), wherein the upper section water-cooled wall group is arranged at the lower part of the hanging device component and is connected with the hanging device component, the upper section rigid beam (1) is arranged at the side part of the upper section water-cooled wall group and is fixedly connected with the upper section water-cooled wall group, the lower section rigid beam (2) is arranged at the side part of the lower section water-cooled wall group and is fixedly connected with the lower section water-cooled wall group, the upper section water-cooled wall group is provided with the upper section lifting lug component (3), the lower section water-cooled wall group is provided with the, the upper section lifting lug assembly (3) is connected with the lower section lifting lug assembly (4) through a chain block (5), and the operation platform component (6) is installed on the lower section water cooling wall group and is connected with the lower section water cooling wall group.
2. The boiler membrane water wall high-altitude pairing installation device is characterized in that the upper-section lifting lug assembly (3) and the lower-section lifting lug assembly (4) are used for hanging and connecting a chain block (5), and the upper-section lifting lug assembly (3) and the lower-section lifting lug assembly (4) are identical in structural composition.
3. The boiler membrane water wall high-altitude pairing installation device as claimed in claim 2, wherein the upper-stage lug assembly (3) and the lower-stage lug assembly (4) comprise a lug installation frame (7), a lug installation stud (8), a lug body (9), an adjusting nut (10), a retaining spring (11) and a positioning pin (12), the lug installation frame (7) is a square frame structure, the lug installation stud (8) is installed in the lug installation frame (7) and fixedly connected with the lug installation frame (7), an installation through hole (13) is formed in the center of the lug body (9), the lug body (9) is installed on the lug installation stud (8) through the installation through hole (13), the retaining spring (11) penetrates through the lug installation stud (8), and one side end of the retaining spring (11) is installed on the inner side wall of the lug installation frame (7) and is connected with the lug installation stud (8) through the inner side wall of the lug installation frame (7) The inside wall of mounting bracket (7) is fixed continuous, the other end portion of holding spring (11) contact with the side of lug body (9), the periphery wall of lug installation stud (8) on the structure have the external screw thread, adjusting nut (10) install on lug installation stud (8) and link to each other through screw-thread fit with lug installation stud (8), a side end portion of locating pin (12) install on the inside wall of lug mounting bracket (7) and fixed continuous with the inside wall of lug mounting bracket (7), lug body (9) on process have chain fall hanging hole (14).
4. The boiler membrane water wall high-altitude pairing installation device as claimed in claim 3, wherein locating pin limiting insertion holes (22) for limiting the locating pins (12) are machined in the lifting lug body (9), and the locating pin limiting insertion holes (22) are uniformly distributed in the lifting lug body (9).
5. The boiler membrane type water-cooled wall high-altitude assembly and installation device of claim 1, wherein the upper section water-cooled wall group and the lower section water-cooled wall group have the same structure, and the two water-cooled wall groups mainly comprise a water-cooled wall header (15), water-cooled wall tubes (16) and fins (17), the fins (17) are installed between every two adjacent water-cooled wall tubes (16) and fixedly connected with the water-cooled wall tubes (16), the water-cooled wall header (15) is installed on one side end part of each water-cooled wall tube (16) and communicated with the water-cooled wall tubes (16), and rectangular holes for installing the upper section lifting lug assembly (3) and the lower section lifting lug assembly (4) are processed on the fins (17).
6. The boiler membrane water-cooled wall high-altitude assembly mounting device as claimed in claim 1, wherein the hanging device components mainly comprise boiler top plate beams (18), connecting screw rods (19) and adjusting nuts (20), through holes are formed in the boiler top plate beams (18), the connecting screw rods (19) penetrate through the through holes in the boiler top plate beams (18), the adjusting nuts (20) are mounted on the upper portions of the connecting screw rods (19) and connected with the connecting screw rods (19) in a thread fit mode, and the bottoms of the connecting screw rods (19) are connected with the water-cooled wall header boxes (15) in the upper-section water-cooled wall group.
7. The method for installing the boiler membrane water wall high-altitude assembly installation device is suitable for the boiler membrane water wall high-altitude assembly installation device of claim 1 and mainly comprises the following steps:
s1, water wall subsection pairing
S11, on a prefabricated platform, assembling small sections of water-cooled walls into designed upper and lower sections according to boiler drawings and numbers, respectively rechecking the sizes of the upper and lower sections of water-cooled walls, performing spot welding according to a welding process card, and then welding water-cooled wall pipes (16), wherein the weld joints are qualified through nondestructive testing;
s2, lifting lugs and chain blocks (5) of upper water-cooling wall group
S21, after the welding of the upper section water-cooling wall group is qualified through nondestructive testing, arranging butt hoisting lifting lugs and chain blocks (5) on fins (17) above the butt position (21) of the lower section water-cooling wall group along the width direction of the water-cooling wall in a distributed manner;
s22, calculating the hoisting calculation load of the lower water-cooling wall group according to the sum of the weight of the lower water-cooling wall group, the weight of the operation platform, the weight of the operation personnel and the weight of the hoisting rigging;
s23, determining the number of the hoisting chain blocks (5) and the rated load lifting capacity of the chain blocks (5) according to the calculated load mode that the number of the hoisting chain blocks (5) multiplied by the rated load lifting capacity of the chain blocks (5) is larger than that of the hoisting of the lower section water wall;
s24, calculating and selecting the thickness of the steel plate used by the butt-joint lifting lug according to the calculated load of the lower water-cooling wall group and the number of the chain blocks (5);
s25, cutting rectangular holes at the fins (17) arranged at the positions of the chain blocks (5), inserting lifting lugs into the holes, and firmly welding the fins (17) and the peripheries of the two surfaces of the lifting lugs;
s26, hooking the chain block (5) which is checked to be abnormal on a plate hole of the lifting lug;
s3, pre-storing the upper water wall group
S31, hoisting the assembled upper water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the furnace reserved opening by using a small-tonnage crane configured on site for a long time, and fixing the pre-stored upper water-cooling wall groups firmly by adopting temporary fixing measures;
s4, hoisting the upper section water cooling wall group in place and installing
S41, hoisting an upper section water-cooling wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding hoisting rigging of the upper section water-cooling wall group on a header at the upper part of the water-cooling wall;
s42, checking whether the lifting lugs and the chain blocks (5) for lifting the upper section water-cooling wall group are abnormal or not, checking to ensure that the hanging devices on the top plate beam of the water-cooling wall to be lifted are installed in place, and fully configuring the connecting pieces in place;
s43, when the upper section water-cooling wall group is hoisted to be close to the hanging device at the upper part of the boiler, the upper section water-cooling wall group is hoisted to the height slowly and is connected with the hanging device at the upper header, and after the hanging devices are all connected and checked, the crane hook can be loosened;
s5, setting lifting lugs of lower water-cooling wall group and installing aerial work platform
S51, after the welding of the lower water-cooling wall group is qualified through nondestructive testing, the lower water-cooling wall group butt-joint hoisting lug is arranged below the butt-joint position (21) of the water-cooling wall in the vertical direction corresponding to the butt-joint hoisting lug of the upper water-cooling wall group and the chain block (5);
s52, manufacturing the opposite-opening hoisting lug of the lower section water cooling wall group, wherein the manufacturing of the opposite-opening hoisting lug of the lower section water cooling wall group is the same as that of the upper section water cooling wall group, cutting a rectangular hole at a fin (17) at the position where the chain block (5) is arranged, inserting the hoisting lug into the hole, and firmly welding the fin (17) and the periphery of two surfaces of the hoisting lug;
s53, arranging an aerial work platform on the lower water-cooling wall group below the position (21) opposite to the upper water-cooling wall group;
s54, the aerial work platform is hooked on the fins (17) of the lower water cooling wall group, and the work platform is provided with a reliable walkway gangboard and a safety rail;
s6, pre-storing and hoisting lower water-cooling wall group in place
S61, hoisting the assembled lower water-cooling wall groups to the positions right below the corresponding positions in the boiler furnace from the reserved openings of the furnace by using a small-tonnage crane configured on site for a long time, and pre-storing the lower water-cooling wall groups by adopting temporary fixing measures;
s62, hoisting a lower water-cooling wall group prestored in the hearth by using a small-tonnage crane configured on site for a long time, and binding a hoisting rigging of the lower water-cooling wall group on a plate hole on one side of a lifting lug of the lower water-cooling wall group;
s63, checking and ensuring that the corresponding positions of the lower water-cooling wall group, the lifting lug for lifting and the operation platform are correct, safe and reliable;
s64, when the lower section water-cooling wall group is hoisted to the opening aligning height close to the upper section water-cooling wall group, hanging a chain block (5) hung on the upper section water-cooling wall group on a lifting lug plate hole of the lower section water-cooling wall group, and synchronously and slowly lifting to the opening aligning height by using the chain block (5);
s7, butt joint, welding and nondestructive testing of upper section water cooling wall group and lower section water cooling wall group
S71, according to the size and the position deviation of the butt gap between the upper section water cooling wall group and the lower section water cooling wall group, the chain block (5) at the corresponding position is pulled up or pulled down to further adjust the butt position (21) and the butt gap;
s72, when the butt joint position (21) and the butt joint gap meet the standard requirements, spot welding and welding are carried out according to the welding process card;
and S73, carrying out weld joint nondestructive testing according to the drawing of the welding boiler and the electrical construction specification requirements.
8. The method for installing the boiler membrane water-cooled wall high-altitude pairing installation device according to claim 7, characterized in that in the step S21, after the welding of the upper-section water-cooled wall group is qualified through nondestructive testing, aligning lifting lugs and inverted chains (5) are distributed on fins (17) which are 1.0-1.5 meters above an aligning position (21) of the lower-section water-cooled wall group and have the height along the width direction of the water-cooled wall, in the step S24, steel plates with the thickness larger than 16mm are used for the aligning lifting lugs, and in the step S25, rectangular holes are cut at the fins (17) at the position where the inverted chains (5) are arranged according to the direction that the lifting lugs are inclined by 20 degrees.
9. The method for installing the boiler membrane type water-cooled wall high-altitude assembly installation device as claimed in claim 7, wherein in the step S51, a lower water-cooled wall assembly aligning lifting lug is arranged at a height position of 0.8-1.0 m below the water-cooled wall aligning position (21), in the step S53, an aerial operation platform is arranged on the lower water-cooled wall assembly 1.2-1.5 m below the upper water-cooled wall assembly aligning position (21), in the step S54, fixing points of operation platform supports on the fins (17) are uniformly distributed, and the distance between every two adjacent fixing points is not more than 2 m.
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