CN115263062B - Flange assembly type aluminum-magnesium stock bin construction method - Google Patents
Flange assembly type aluminum-magnesium stock bin construction method Download PDFInfo
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- CN115263062B CN115263062B CN202211189448.3A CN202211189448A CN115263062B CN 115263062 B CN115263062 B CN 115263062B CN 202211189448 A CN202211189448 A CN 202211189448A CN 115263062 B CN115263062 B CN 115263062B
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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
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/22—Containers for fluent solids, e.g. silos, bunkers; Supports therefor
- E04H7/24—Constructions, with or without perforated walls, depending on the use of specified materials
- E04H7/30—Constructions, with or without perforated walls, depending on the use of specified materials mainly 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
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/51—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for storing agricultural or horticultural products
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Abstract
The invention discloses a flange assembly type aluminum magnesium bin construction method, and belongs to the technical field of bin installation construction. The construction method comprises the steps of rolling and molding the cylinder, the cone section, the skirt and the like in a separating mode, welding the angle steel flanges on the edges of the cylinder, the cone section, the skirt and the like, connecting the flanges between the cylinders through bolts when assembling in the field, and then welding the flanges inside the cylinder, so that the construction method is simple and rapid, the assembling quality is easy to guarantee, welding deformation can be prevented, and the welding amount in the field can be reduced. The flange also plays the role of a reinforcing rib, and the flange does not need to be reinforced during hoisting. The construction method is suitable for the installation of aluminum-magnesium alloy bins such as polyolefin powder bins, packaging bins, blending bins and the like.
Description
Technical Field
The invention relates to the technical field of bin installation, in particular to a flange assembly type aluminum magnesium bin construction method.
Background
The aluminum magnesium alloy has the characteristics of small density, good corrosion resistance, high electric conductivity, high thermal conductivity and the like, and is widely applied to the fields of aviation, electronics, petrochemical engineering, mechanical manufacturing and the like. In recent years, aluminum magnesium alloy bins are widely used in the construction of polypropylene and polyethylene devices.
The existing manufacturing method is to roll the cylinder body of the aluminum magnesium alloy bin in a split manner, roll the conical section of the aluminum magnesium alloy bin in a split manner, and transport the cylinder body to a construction site. When the time alignment is carried out on site, each sheet and each petal are firstly spot welded and then welded by adopting a symmetrical discontinuous step-back welding method. During hoisting, the lower section of the cylinder body is reinforced, and the inner expansion ring is expanded in the cylinder body to prevent deformation, but the construction difficulty of the inner expansion ring is higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flange assembly type aluminum magnesium stock bin construction method so as to at least achieve the aims of reducing the deformation of the stock bin and reducing the construction difficulty.
In order to solve the technical problems, the invention adopts the technical scheme that: a flange assembly type aluminum magnesium bin construction method comprises the following steps:
step one, respectively dividing and assembling the shell section, the skirt support and the cone section into pieces
The cone section comprises an upper cone, a transition cone and a lower cone; the shell ring, the skirt support and the cone section are prefabricated and assembled in a split mode, and flanges with bolt holes are arranged on the edges of the outer walls of the shell ring, the skirt support and the cone section; when the shell ring, the skirt and the cone section are paired, the outer wall connects flanges at longitudinal seams through bolts, and the inner wall of the longitudinal seams is welded;
step two, assembling and welding the bin top
Lifting the assembled upper cone body and placing the assembled upper cone body on the 1 st section of the cylindrical shell section, aligning and fastening the upper cone body and a flange at the joint ring seam of the 1 st section of the cylindrical shell section by using bolts; lifting the bin top platform, placing the bin top platform on the cone top of the upper cone, aligning and performing spot welding, and then completing seam welding of the upper cone and the connecting ring on the inner wall of the 1 st section of the shell ring to form a bin top;
step three, assembling and welding the transition cone and the skirt base
After the group pair of the skirt support and the transition cone is completed, lifting the skirt support by a crane and then sleeving the skirt support into the transition cone, then lifting the transition cone to be positioned with the skirt support by spot welding, connecting the transition cone with a flange at the outer wall of a connecting circular seam of the skirt support by bolts, and welding the inner wall of the connecting circular seam;
step four, assembling and welding a lower cone;
forming a lower cone by a plurality of sections of cones, fastening a flange at the outer wall of the circular seam by using bolts after the cones are aligned, and welding the inner wall;
step five, assembling and welding the bin top, the shell ring and the skirt by a vertical flip-chip method
Lifting the top of the bin by using a crane, placing the bin on the 2 nd section of the cylindrical shell, aligning the 1 st section of the cylindrical shell with the 2 nd section of the cylindrical shell, connecting flanges at the outer wall of the circular seam by using bolts, and welding the inner wall of the circular seam; lifting the assembled and welded bin top and the section 2 barrel section and assembling and welding the assembled and welded bin top and the section 2 barrel section with the placed section 3 barrel section; repeating the steps until the assembly with the lowest end shell ring is completed;
after the assembly of the lowest end shell ring is finished, the whole shell ring is lifted up to be vertically assembled with the skirt, and after the assembly is finished, the shell ring is horizontally placed on the roller;
sixthly, carrying out wall-attached pipe installation, cone section folding, mixing unit installation and auxiliary prewelding part installation, and finishing the assembly of the aluminum-magnesium stock bin;
and seventhly, transporting and hoisting the assembled aluminum-magnesium storage bin in place.
Further, the lower cone comprises a large cone, a middle cone and a small cone, the small cone is lifted and placed on the middle cone, the small cone and the middle cone are assembled, and the assembled small cone and the assembled middle cone are lifted and assembled with the large cone; during assembly, after alignment, the flanges at the outer wall of the circular seam are fastened by bolts, and the inner wall of the circular seam is welded.
Furthermore, the upper cone, the transition cone, the large cone, the middle cone and the small cone are all assembled by fan-shaped parts, and during assembly, the fan-shaped parts are placed on a wood support, and the fan-shaped parts are connected and fixed by longitudinal seams through bolts.
Further, 12 sections of cylinder sections are included.
Further, in the sixth step, the assembled and welded lower cone is horizontally lifted to be folded with the transition cone.
And further, in the seventh step, during hoisting, a 500-ton crawler crane is used as a main crane, and the tail of a 70-ton truck crane is used for hoisting the aluminum-magnesium storage bin in place.
The method adopted by the invention is characterized in that after the barrel, the cone section, the skirt support and the like are rolled and molded in a separating mode, the angle steel flange is additionally welded on the edge of each sheet, the flanges among the sheets are connected through the bolts when the sheets are assembled on site, and then the welding is carried out inside the sheets. The angle steel flanges play a role of reinforcing ribs at the same time, and reinforcement is not needed during hoisting.
The construction method is suitable for the installation of aluminum-magnesium alloy bins such as polyolefin powder bins, packaging bins, blending bins and the like.
Drawings
FIG. 1 is a schematic view of the structure of the lower cone of the present invention.
Fig. 2 is a schematic view of the overall structure of the aluminum-magnesium bunker of the present invention.
In the figure, 1-small cone, 2-middle cone, 3-large cone, 4-transition cone, 5-upper cone, 6-cylindrical shell, 7-skirt, 8-flange, 9-bolt and 10-support ring.
Detailed Description
The invention provides a construction method of a flange assembly type aluminum magnesium silo, and the aluminum magnesium silo comprises a plurality of cone sections, a plurality of cylinder sections 6, a skirt support 7, a hanging wall pipe and a blending unit.
Taking an IPCI petrochemical integration project as an example, the project includes a Propane Dehydrogenation (PDH) device, a polypropylene (PP) device, and a supporting auxiliary device. The polypropylene device comprises 20 aluminum-magnesium bins in total, wherein the aluminum-magnesium bins have the outer diameters of phi 7000mm, H =34.8m and the volumes of 1070m 3 The main body material AW5083 has the wall thickness delta = 4-14 mm, and consists of 5 sections of the cone section and 12 sections of the cylinder body. The material of the mixing pipe is AW 6060, and other materials are AW5754 and AW5454. Because the aluminum-magnesium storage bin has thinner wall thickness and lower strength, the aluminum-magnesium storage bin is easy to deform during assembly, and the storage bin is prevented from deforming,according to the invention, when the shell ring 6, the skirt support 7 and the cone section are paired, and when the shell ring 6, the cone section, the skirt support 7 and the like are connected, an outer wall bolt connecting flange 8 and an inner wall are welded, and the adopted flange 8 is an angle steel flange.
Preparation for construction
And (4) setting an assembly site on site, erecting a prefabricated platform and an assembly platform, and carrying out integral transportation and hoisting after assembly and welding are finished. The prefabricated platform and the assembly platform are correspondingly paved with rubber sheets, cloth with strength, paper and the like, the inner side of the hoisting clamp is padded with cloth or a galvanized iron sheet to prevent scratching the surface of the aluminum material, and 1-2 points are clamped as much as possible to facilitate centralized treatment.
The surface of the aluminum-magnesium alloy plate should be clean and should not have cracks and oxide inclusions; pitting, sinking, bruising, scratching and roller indentation on the surface of the aluminum-magnesium alloy plate, wherein the depth of the pitting, sinking, bruising, scratching and roller indentation does not exceed the thickness allowable deviation of the plate; the surface of the aluminum magnesium alloy plate must not have the defects of cracks, tensile cracks, nicks, scratches, folding, pockmarks, pits, corrosion, layering and the like, and the defects are found to be cleared. The surface after removal or polishing must not have visible waviness. The qualified plate is stored properly, and proper measures are taken to protect the surface to be detected. The aluminum-magnesium alloy plate and parts thereof are stored separately from other materials and are respectively placed on a skid or a rubber steel platform according to specification and size, and are strictly prevented from being mixed and contacted with carbon steel materials.
Welding process
The welding method for the aluminum-magnesium alloy mainly comprises MIG welding and TIG welding. Because the MIG welding adopts the inert gas Ar as the protective gas, the protection effect is good, almost all metal materials can be welded, and the application range is wide. The MIG welding adopts welding wires as electrodes, multi-current welding which is larger than TIG welding can be adopted, the electric arc power is large, the heat is concentrated, the welding speed is high, the heat affected zone is small, the fusion depth of a base metal is large, the production efficiency is improved by 2 times to 3 times compared with the TIG welding, the welding seam quality is excellent, and the MIG welding is mainly assisted with the TIG welding according to the design characteristics of a storage bin.
The welding wire is selected in consideration of good welding process performance, the corrosion resistance of a welding joint also reaches or approaches the level of a base metal, and the tensile strength and the plasticity of a butt joint meet specified requirements according to specific requirements. Therefore, the welding wire is selected mainly according to the following principles:
1) The chemical components of the welding wire are generally the same as or similar to those of the base material;
2) The content of corrosion-resistant elements (magnesium, manganese, silicon and the like) in the welding wire is generally not lower than that of a base metal;
3) According to ISO 15614-2, the tensile strength of the welding joint of the AW5083 is not lower than the minimum value of the tensile strength required by standard specification EN 485-2 under the condition that the base material is not subjected to heat treatment after welding, namely the requirement is met.
According to the principle, the chemical components and the mechanical properties of the aluminum alloy, 5183 welding wires are selected as MIG welding wires.
Because the heat conductivity of the aluminum-magnesium alloy is larger, the liquid metal fluidity is better than that of steel, a larger groove angle is generally selected, the test piece is made of a plate with the thickness of 14mm, and a V-shaped groove is manufactured by a groove cutting machine.
Cleaning and preheating before welding: and cleaning an oxide film and oil stains on the surface of the groove of the workpiece by using a polishing machine, and preheating to more than 5 ℃ before welding if the aluminum-magnesium alloy bin is constructed in winter.
And (3) cleaning the groove and oxide films and dust in the range of 50mm on two sides, and drying the groove and the range of 50mm on two sides during field welding. A welding machine wire feeding mechanism and a cooling water tank (filled with 40% glycol solution) are selected, and a water-cooling handle is selected as the welding handle, so that semi-automation of the welding process is realized. The welding wire is a 1.2mm and 1.6mm disk-shaped welding wire, and high-purity argon with the purity of more than or equal to 99.996% is used as protective gas. The welding mode adopts pulse bottoming and pulse capping, so that the internal and surface welding quality is ensured, the arc starting and arc stopping are well processed, the defects of inclusion, incomplete penetration, cracks and the like are avoided, and wind prevention measures are made to avoid air holes all the time.
The shell ring 6, the skirt support 7 and the cone section are grouped into one group
The cone section comprises an upper cone 5, a transition cone 4 and a lower cone; the shell ring 6, the skirt support 7 and the cone section are prefabricated and assembled in a split-piece mode, and flanges 8 with bolt holes are arranged on the edges of the outer walls of the shell ring 6, the skirt support 7 and the cone section; when the cylinder section 6, the skirt support 7 and the cone section are paired, the outer wall is connected with a flange 8 at the longitudinal joint through a bolt 9, and the inner wall at the longitudinal joint is welded.
Welding of bin roof
Lifting the assembled upper cone 5 and placing the assembled upper cone on the 1 st section of the cylindrical shell, aligning and connecting and fastening the upper cone 5 and a flange 8 at a connecting annular gap of the 1 st section of the cylindrical shell by using a bolt 9; and lifting the bin top platform, placing the bin top platform on the conical top of the upper cone 5, aligning and performing spot welding, and then performing girth welding on the upper cone 5 and the inner wall of the 1 st section of the shell ring to complete the formation of the bin top.
The transition cone 4 and the skirt base 7 are assembled and welded
After the group pairs of the skirt support 7 and the transition cone 4 are completed, the skirt support 7 is lifted by a crane and then sleeved into the transition cone 4, then the transition cone 4 is lifted to be positioned with the skirt support 7 in a spot welding manner, the transition cone 4 is connected with a flange 8 at the outer wall of a circular seam connecting the skirt support 7 and the transition cone 4 through bolts, and the inner wall of the circular seam connecting part is welded.
Lower cone assembly welding
The lower cone is formed by a plurality of sections of cones, the flanges 8 at the outer wall of the circular seam are fastened by bolts 9 after the cones are aligned, and the inner wall of the circular seam is welded.
The lower cone comprises a large cone 3, a middle cone 2 and a small cone 1, the small cone 1 is lifted and placed on the middle cone 2, the small cone 1 and the middle cone 2 are assembled, and the assembled small cone 1 and the assembled middle cone 2 are lifted and assembled with the large cone 3; during assembly, after alignment, the flange 8 at the outer wall of the circular seam is fastened by bolts 9, and the inner wall is welded.
The upper cone 5, the transition cone 4, the large cone 3, the middle cone 2 and the small cone 1 are all assembled by sector parts, and during assembly, the sector parts are placed on a wood bracket and are connected and fixed by longitudinal seams of bolts 9.
Assembling and welding bin top, shell section 6 and skirt 7 by vertical flip-chip method
Lifting the top of the bin by using a crane, placing the bin on the 2 nd section of the cylindrical shell, aligning the 1 st section of the cylindrical shell with the 2 nd section of the cylindrical shell, connecting a flange 8 at the outer wall of the circular seam by using a bolt 9, and welding the inner wall of the circular seam; the 2 nd section of the cylindrical shell section is left without welding for 500 mm.
Lifting the assembled and welded bin top and the section 2 barrel section and assembling and welding the assembled and welded bin top and the section 2 barrel section with the placed section 3 barrel section; and repeating the steps until the assembly of the lowest end shell ring (the 12 th shell ring) is completed.
When the shell ring is assembled, four assembly lines (0 degrees, 90 degrees, 180 degrees and 270 degrees) separated by 90 degrees are drawn on the outer wall of the shell ring 6 and are used as the installation and alignment basis of the sectional assembly and the integral assembly.
When the circular seam is horizontally welded, the circular seam is symmetrically welded in a jumping mode to prevent the circular seam of the cylinder body from deforming, and finally the welding seam is filled. And a rubber passage is laid at the bottom of the shell ring 6 for a welder to walk and place machines, so that the inner surface quality of the storage bin is ensured.
And after the lowest end shell ring (shell ring 12) is assembled, the assembled skirt base 7 and the transition cone 4 are inverted on a platform, the shell ring 6 is integrally lifted and is vertically assembled and welded with the skirt base 7, and after the assembly is finished, the shell ring is horizontally placed on a rolling die by a double-machine lifting crane.
And (4) carrying out wall-adhering pipe installation, cone folding, mixing unit installation and auxiliary pre-welding part installation.
And horizontally placing the bin on the rolling tire, and then installing and welding a wall-mounted pipe. After the wall-mounted pipe is installed, the assembled and welded lower cone is horizontally lifted and folded with the transition cone, after the wall-mounted pipe is aligned, the flange 8 at the joint of the outer wall is fastened by bolts, the inner wall of the joint is welded, and after the wall-mounted pipe is welded, the mixing pipeline is installed.
And performing VT inspection and UT inspection after welding of all welding seams is finished, and performing airtight test after welding is qualified.
Weighing module, support ring 10 mounting
The aluminum-magnesium stock bin is provided with weighing modules, and each group of weighing modules comprises a weighing module, a supporting prosthesis, a horizontal limiting device, an overturn preventing device and the like. The almag storehouse is installed on support ring 10, and weighing module evenly sets up, support ring 10 and 7 bolted connection of skirt.
During installation, the weighing module is replaced by the supporting prosthesis, and after the equipment is installed, the weighing module is replaced by the supporting prosthesis during debugging. The weighing modules are uniformly distributed on the basic embedded plate according to a 360-degree circle, and initial leveling and alignment are carried out.
The support ring 10 is assembled into a whole on site, bolts on the upper surface and the lower surface of the skirt 7 are required to be ensured to be on the same axis, the deviation is +/-1 mm, and the error of the center distance of the bolt holes is +/-1 mm. And after assembling and leveling, fully welding the joint of the blocks, and removing the temporary support channel steel after fully welding.
After the assembly welding of the skirt bases 7 is completed, the skirt bases are positioned on the arranged weighing modules and then are leveled. The top plate of the weighing module is flatly attached to the bottom plate of the support ring 10, the bottom plate of the weighing module is flatly attached to the basic embedded plate, and then the weighing module is connected in a continuous welding mode, welding is firm, and the height of a welding line is larger than 20mm. And after welding, performing rust removal and painting treatment.
2 50 tons of truck cranes are adopted to lift and hoist the storage bin to a professional transport vehicle, and an axis vehicle is adopted for transportation, so that the storage bin is bound to prevent slipping and collision in the transportation process. A500-ton crawler crane is used as a main crane, and a 70-ton truck crane runs through the tail to hoist the storage bin in place.
According to the embodiment, the aluminum-magnesium bin is divided into pieces and assembled in a segmented mode, the outer wall is connected through bolts, and the inner wall is connected through multilayer welding. And (4) setting an assembly site on site, and integrally transporting and hoisting after assembly and welding are finished. The storage bins are grouped in sections, and a forward loading method and a reverse loading method are adopted according to the characteristics of different sections; and after the assembly of each section is finished, the integral assembly is carried out by adopting a flip-chip method. After the assembly welding is finished, the double-crane lifting crane is horizontally placed on the rolling die, then the wall hanging pipe installation is carried out, then the cone section folding and welding are finished, and finally the mixing chamber installation, the mixing pipe installation and the installation welding of auxiliary pipelines, ladder platform preweldments and the like are carried out.
By adopting the method for construction, the welding and assembling speed is high, the welding quality is ensured, and the welding deformation can be effectively controlled; can practice thrift the place, be convenient for many feed bins be under construction simultaneously, 12 feed bins divide 2 batches of constructions, 6 feed bins simultaneous workings, equipment, welded platform once only set up, reuse, 12 feed bins hoist simultaneously and take one's place, practice thrift manpower and materials, the construction continuity is strong.
Claims (6)
1. A flange assembly type aluminum magnesium stock bin construction method is characterized by comprising the following steps of:
step one, respectively dividing and assembling the shell section, the skirt support and the cone section into pieces
The cone section comprises an upper cone, a transition cone and a lower cone; the shell ring, the skirt support and the cone section are prefabricated and assembled in a piece-by-piece mode, and flanges with bolt holes are arranged on the edges of the outer walls of the shell ring, the skirt support and the cone section; when the cylinder section, the skirt support and the cone section are paired, the outer wall connects flanges at longitudinal seams through bolts, and the inner wall of the longitudinal seams is welded;
step two, assembling and welding the bin top
Lifting the assembled upper cone body and placing the assembled upper cone body on the 1 st section of the cylindrical shell section, aligning and fastening the upper cone body and a flange at the joint ring seam of the 1 st section of the cylindrical shell section by using bolts; lifting the bin top platform, placing the bin top platform on the cone top of the upper cone, aligning and performing spot welding, and then completing welding of the upper cone and the connecting ring seam of the inner wall of the 1 st section of the shell ring to form a bin top;
step three, assembling and welding the transition cone and the skirt base
After the group pair of the skirt support and the transition cone is completed, lifting the skirt support by a crane and then sleeving the skirt support into the transition cone, then lifting the transition cone to be positioned with the skirt support by spot welding, connecting the transition cone with a flange at the outer wall of a connecting circular seam of the skirt support by bolts, and welding the inner wall of the connecting circular seam;
step four, assembling and welding a lower cone;
forming a lower cone by a plurality of sections of cones, fastening a flange at the outer wall of the circular seam by using bolts after the cones are aligned, and welding the inner wall;
step five, assembling and welding the bin top, the shell ring and the skirt by a vertical flip-chip method
Lifting the top of the bin by using a crane, placing the bin on the 2 nd section of the cylindrical shell, aligning the 1 st section of the cylindrical shell with the 2 nd section of the cylindrical shell, connecting flanges at the outer wall of the circular seam by using bolts, and welding the inner wall of the circular seam; lifting the assembled and welded bin top and the section 2 barrel section and assembling and welding the assembled and welded bin top and the section 2 barrel section with the placed section 3 barrel section; repeating the steps until the assembly with the lowest end shell ring is completed;
after the assembly of the lowest end shell ring is finished, the whole shell ring is lifted up to be vertically assembled with the skirt, and after the assembly is finished, the shell ring is horizontally placed on the roller;
sixthly, carrying out wall-attached pipe installation, cone section folding, mixing unit installation and auxiliary prewelding part installation, and finishing the assembly of the aluminum-magnesium stock bin;
and step six, the installation of a weighing module and a support ring is also included:
the aluminum-magnesium material bin is arranged on a support ring, the weighing modules are uniformly arranged, and the support ring is connected with the skirt base through bolts;
during installation, the supporting prosthesis is used for replacing the weighing module, after equipment is installed, the equipment is debugged and replaced by the weighing module; uniformly arranging weighing modules on a basic embedded plate according to a 360-degree circle, and performing primary leveling and alignment;
the support ring is assembled into a whole on site, bolts on the upper surface and the lower surface of the skirt are guaranteed to be on the same axis, the deviation is +/-1 mm, and the error of the center distance of the bolt holes is +/-1 mm; after assembling and leveling, fully welding the joint of the blocks, and removing the temporary support channel steel after fully welding;
after the skirt bases are welded, the skirt bases are positioned on the arranged weighing modules and then leveled; the top plate of the weighing module is flatly attached to the bottom plate of the support ring, the bottom plate of the weighing module is flatly attached to the foundation embedded plate, and then the weighing module is connected in a continuous welding mode, the welding is firm, and the height of a welding line is larger than 20mm;
and seventhly, transporting and hoisting the assembled aluminum-magnesium storage bin in place.
2. The flange pairing type aluminum magnesium silo construction method of claim 1, wherein the method comprises the following steps: the lower cone comprises a large cone, a middle cone and a small cone, the small cone is lifted and placed on the middle cone, the small cone and the middle cone are assembled, and the assembled small cone and the assembled middle cone are lifted and assembled with the large cone; during assembly, after alignment, the flanges at the outer wall of the circular seam are fastened by bolts, and the inner wall of the circular seam is welded.
3. The flange pairing type aluminum magnesium silo construction method of claim 2, wherein the method comprises the following steps: the upper cone, the transition cone, the large cone, the middle cone and the small cone are all assembled by fan-shaped parts, and when the fan-shaped parts are assembled, the fan-shaped parts are placed on a wood bracket, and the fan-shaped parts are connected and fixed by longitudinal seams through bolts.
4. The flange pairing type aluminum magnesium silo construction method of claim 1 or 3, characterized in that: totally comprises 12 sections of shell sections.
5. The flange pairing type aluminum magnesium silo construction method according to claim 4, characterized in that: and step six, horizontally lifting the assembled and welded lower cone and carrying out cone section folding with the transition cone.
6. The flange pairing type aluminum magnesium silo construction method of claim 1 or 5, characterized in that: and seventhly, during hoisting, a 500-ton crawler crane is used as a main crane, and a 70-ton truck crane tail slides to hoist the aluminum-magnesium storage bin in place.
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