CN113819392B - Blast furnace gas cabinet installation method - Google Patents
Blast furnace gas cabinet installation method Download PDFInfo
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- CN113819392B CN113819392B CN202111106192.0A CN202111106192A CN113819392B CN 113819392 B CN113819392 B CN 113819392B CN 202111106192 A CN202111106192 A CN 202111106192A CN 113819392 B CN113819392 B CN 113819392B
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- side plate
- shaped steel
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- rail
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/013—Gas-holders of variable capacity with movables discs
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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
- B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17B—GAS-HOLDERS OF VARIABLE CAPACITY
- F17B1/00—Gas-holders of variable capacity
- F17B1/02—Details
Abstract
The invention provides a blast furnace gas cabinet installation method, which comprises the following steps: a1, feeding and discharging materials on a steel plate to obtain a rectangular side plate, and carrying out arc rolling operation on the side plate; a2, manufacturing bent T-shaped steel; a3, preparing a fetal membrane, wherein the fetal membrane is provided with an arc-shaped calibration surface; a4, placing the side plate on a calibration surface of the tire membrane, pressing and fixing the side plate on the calibration surface by using a balance weight, attaching a flange of the bent T-shaped steel to the upper surface of the side plate, and pressing and fixing the bent T-shaped steel on the side plate and the cushion block by using a pressing mechanism; a5, welding and connecting the side plates and the bent T-shaped steel; and installing each component. When welding curb plate and curved T shaped steel, utilize the calibration face that camber and curb plate are unanimous to support the curb plate to set up the counter weight on the curb plate, the counter weight produces great pressure to the curb plate, and pressure makes the curb plate maintain original shape all the time, prevents that the curb plate warp among the welding process, thereby guarantees the camber accuracy of curb plate.
Description
Technical Field
The invention relates to the technical field of gas cabinet installation, in particular to a blast furnace gas cabinet installation method.
Background
In industrial construction projects, in order to meet the requirements of environmental protection, improve the utilization rate of gas and balance the pressure of a pipe network, for example, a gas storage device, namely a gas tank, needs to be constructed in power plants, steel plants and the like, wherein the gas tank has a relatively large diameter and a relatively high height of 15 ten thousand meters 3 Blast furnace gas holder, for example, 56.539m in diameter (outside diameter of side plate)) Height 107.8755m (ventilated clerestory); 15 ten thousand meters 3 The above cabinet-type diameter and height will be larger.
Blast furnace gas cabinet mainly comprises bottom plate system, piston system, cabinet top system, stand curb plate system, gallery cat ladder, elevartor shaft, cage hoist engine etc. and current work progress is: the method comprises the following steps of embedding column foundation bolts, hoisting a first section of column, paving a bottom plate, installing a lower side plate, installing a central table frame, installing a piston system, installing a tank top truss beam-plate-ventilation clerestory, installing a temporary sealing mechanism, floating a piston, installing an upper column and a side plate, installing a corridor, installing a ladder, installing an elevator shaft, installing a diffusing pipe, descending the piston, installing an oil pump station and a pipe, installing accessory equipment, coating, pouring concrete in a piston box and debugging.
Because the curb plate diameter is big, generally be at job site preparation curb plate, the manufacturing process does: blanking a steel plate and T-shaped steel, rolling a circular arc by using a side plate and the T-shaped steel, assembling and welding the side plate and the T-shaped steel, and drilling a mounting hole. During construction, a plurality of side plates with the same curvature are spliced into a cylindrical cabinet body. When the side plates and the T-shaped steel are in butt welding, deformation can be generated, and the dimensional accuracy such as curvature of the side plates and the T-shaped steel is affected.
At present, the installation of cage hoist engine generally adopts two kinds of modes installation: 1. after the cabinet bottom plate, the central rack and the winch platform are installed, the cabinet bottom plate, the central rack and the winch platform are hoisted in place on the central bottom plate by using a crane. 2. After the tank top is formed, and before the piston floats, the gas tank is directly hoisted in place by a crane outside the gas tank. The method 1 is used for installation, the weight of a cabinet top winch is about 3.5t, the installation height of a winch is about 27m, a 50-ton crane needs to be reorganized, the crane is erected on a laid central bottom plate for hoisting, firstly, the central bottom plate is of a thin plate structure, the plate thickness is about 4.5mm basically, a large number of welding connections exist, and stress is concentrated. In general construction, a crane or other heavy objects are not allowed to roll the central bottom plate, otherwise, the welded seam of the bottom plate is easily pulled apart, and the welded and formed bottom plate is uneven, so that the flatness of the bottom plate is out of limit and is not easy to process. Secondly, the station of the crane is positioned on the central bottom plate, and the working radius of the crane is just the construction range of other working procedure construction operators, so that other working procedures are causedThe whole unable construction of preface, extravagant construction manpower resources influence the efficiency of construction. The method 2 is used for installation, the crane is installed outside the gas tank in a standing mode, the defect of the method 1 is overcome, but the crane is installed outside in a standing mode, the working radius of the crane is increased, and the working radius is 15 ten thousand meters 3 The gas cabinet needs a large crane of more than 160t for installation, the preparation time and the cost are relatively large, and especially, many industrial constructions are built in remote places, so that the large crane has fewer resources, and the construction difficulty is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a blast furnace gas holder installation method which can prevent the side plate and T-shaped steel from deforming during welding and ensure that the side plate has accurate curvature.
The technical scheme adopted by the invention for solving the technical problem is as follows: the blast furnace gas tank installation method comprises
A. On-spot preparation stand, curb plate, piston system, cabinet top system, ventilative building and elevartor shaft, wherein, the preparation process of curb plate is:
a1, feeding and discharging materials on a steel plate to obtain a rectangular side plate, and carrying out arc rolling operation on the side plate;
a2, feeding and discharging the T-shaped steel to obtain straight T-shaped steel, and performing arc rolling operation on the straight T-shaped steel to obtain bent T-shaped steel, wherein the curvature of the bent T-shaped steel is consistent with that of the side plate;
a3, preparing a fetal membrane, wherein the fetal membrane is provided with an arc-shaped calibration surface, the design curvature of the calibration surface is consistent with that of the side plate, the length of the calibration surface is greater than that of the side plate, and the width of the calibration surface is greater than that of the side plate;
a4, horizontally placing a tire membrane, enabling the calibration surface to face upwards, placing a side plate on the calibration surface of the tire membrane, enabling the inner side surface of the side plate to be attached to the calibration surface, pressing and fixing the side plate on the calibration surface by using a balance weight, enabling a web plate of the bent T-shaped steel to face upwards, enabling a flange edge on one side of the web plate to be attached to the upper surface of the side plate, arranging a cushion block between the flange edge on the other side of the web plate and the calibration surface, enabling the curvature of the cushion block to be equal to that of the side plate, enabling the thickness of the cushion block to be equal to that of the side plate, and pressing and fixing the bent T-shaped steel on the side plate and the cushion block by using a pressing mechanism;
a5, welding and connecting the side plates and the bent T-shaped steel;
B. the method comprises the following steps of sequentially carrying out upright column lower part installation, bottom plate laying, lower part side plate installation, central rack installation, piston system installation, cabinet top system installation, temporary sealing mechanism installation, piston buoyancy lifting, upper part upright column and upper part side plate installation, gallery installation, ladder installation, elevator shaft installation, blow-off pipe installation, piston descending, oil pump station and pipe arrangement, accessory equipment installation, coating, concrete pouring in a piston box and debugging.
Further, in the step A1, a rectangular side plate is obtained through continuous shearing blanking by a profiling, the length and width errors of the rectangular side plate are less than 4mm, and the unevenness is less than or equal to 4mm.
Further, in the step A1, firstly, positioning holes are drilled in the side plates, and then arc rolling is carried out;
in the step A2, firstly drilling a row of mounting holes on the flange on one side of a web plate of the straight T-shaped steel, drilling a row of plug welding holes on the flange on the other side of the web plate, and then carrying out arc rolling operation on the straight T-shaped steel;
in the step A3, a pin hole is drilled in the tire membrane, the position of the pin hole corresponds to that of the positioning hole, and in the step A4, a positioning pin penetrates through the positioning hole and the pin hole to position the side plate;
and step A5, plug welding is carried out through the plug welding holes, so that the side plates and the bent T-shaped steel are welded and connected.
Further, in step A4, hold-down mechanism is including the depression bar of falling the U-shaped, the connecting rod of the one end fixedly connected with L shape of depression bar, be provided with vertical locking bolt on the horizontal segment of connecting rod, during the use, remove the vertical section of connecting rod to one side of fetal membrane for the horizontal segment of connecting rod stretches into the below of fetal membrane, and the other end of depression bar is located the top of curved T shaped steel, and rotatory locking bolt makes locking bolt and the lower surface of fetal membrane compress tightly.
Further, in the step A4, the counterweight is an arc-shaped frame body, and the curvature of the frame body is the same as that of the side plate.
Further, in the step B, the cage winch is installed after the cabinet top system is installed:
b1, arranging a hoisting platform above a tower on the top of the cabinet, installing two rows of vertical rail stand columns between the hoisting platform and the edge of the top of the cabinet, wherein the height of the rail stand columns is gradually reduced from the hoisting platform and the edge of the top of the cabinet, and the upper end of each row of rail stand columns is positioned on the same straight line;
b2, installing a rail on each of the two rows of rail stand columns, wherein one end of each rail is positioned on the edge of the top of the cabinet, the other end of each rail is positioned on the edge of the hoisting platform, and the two rails are parallel to each other;
b3, hoisting the cage winch to the lower end of the track by using hoisting equipment, and pulling the cage winch to move upwards along the track by using a chain block to enable the cage winch to reach a hoisting platform;
and B4, installing and fixing the cage winch on the winch platform.
Further, the rail upright column is made of H-shaped steel, a top plate is arranged at the upper end of the H-shaped steel, a bottom plate is arranged at the lower end of the H-shaped steel, the top plate is obliquely arranged and attached to the lower surface of the rail, and the top plate is connected with the rail through bolts.
And step B2, after the tracks are arranged on the track upright posts, connecting the two tracks into a whole by adopting a plurality of connecting beams.
Furthermore, the track adopts H shaped steel, sets up polylith evenly distributed's stiffening plate between orbital both flanges, and orbital web is vertical to be set up, and orbital last flange welded connection has the angle steel.
Furthermore, a plurality of threaded holes are formed in the rail, and in the step B3, after the cage winch is pulled to move upwards for a certain distance, bolts are installed in the threaded holes in the rear of the cage winch.
The invention has the beneficial effects that: when welding curb plate and curved T shaped steel, utilize the calibration face that camber and curb plate are unanimous to support the curb plate to set up the counter weight on the curb plate, the counter weight produces great pressure to the curb plate, and pressure makes the curb plate maintain original shape all the time, prevents that the curb plate warp among the welding process, thereby guarantees the camber accuracy of curb plate.
Drawings
FIG. 1 is a schematic top view of a side panel during welding;
FIG. 2 is a schematic front view of the side plates during welding;
FIG. 3 is a side view schematic of the side plates as they are welded;
FIG. 4 is an enlarged schematic view of portion A of FIG. 3;
FIG. 5 is a schematic top view of a rail set up;
FIG. 6 is a schematic cross-sectional view of C-C of FIG. 5;
FIG. 7 is a schematic cross-sectional view of B-B of FIG. 5;
reference numerals: 100-side plate; 101-positioning holes; 200-bending T-shaped steel; 201-mounting holes; 202-plug welding holes; 1-a calibration surface; 2, balancing weight; 3, a cushion block; 4, pressing a rod; 5, connecting a rod; 6, locking the bolt; 7, a hoisting platform; 8-tower; 9-rail upright post; 10-a track; 11-a top plate; 12-a base plate; 13-connecting the beam; 14-angle steel; 15-a stiffening plate.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The blast furnace gas cabinet installation method comprises the following steps
A. The manufacturing process of on-site preparation stand, curb plate 100, piston system, counter top system, ventilative building and elevartor shaft, stand, piston system, counter top system, ventilative building and elevartor shaft adopts prior art, and wherein, the manufacturing process of curb plate 100 is:
a1, obtaining rectangular side plates 100 on a steel plate by feeding and discharging, wherein the steel plate adopts a bidirectional sizing plate, the rectangular side plates 100 are obtained by continuous shearing and discharging through a profiling, gas cutting or other discharging modes are not allowed to be adopted, the length and width errors of the side plates 100 are smaller than 4mm, the unevenness is smaller than or equal to 4mm, and the grooves of the side plates 100 are finished by a manual edge planer. When the unevenness of curb plate 100 is great, utilize the flatbed to correct, can heat the great position of unsmooth degree during the correction to improve correction efficiency, reduce and correct the degree of difficulty.
When the side plate 100 is in a flat state, a hole to be processed is drilled, for example, a positioning hole 101 is drilled, during subsequent welding, the positioning hole 101 can be used for fixing the side plate 100 on a tire membrane, and during subsequent formal construction, the positioning hole 101 can be used for connecting with other equipment. After the side plate 100 is bent, the pitch of the holes changes to a certain extent, so before drilling, a test is performed to find out the pitch of the holes after bending, and the position of the drilling hole is adjusted to ensure that the pitch of the holes meets the design requirements after the side plate 100 is bent.
And then, carrying out arc rolling operation on the side plate 100 by using a plate rolling machine, and checking the size and the curvature of the rolled arc so that the curvature of the side plate 100 meets the design requirement.
A2, feeding and discharging the T-shaped steel to obtain straight T-shaped steel, wherein the T-shaped steel is section steel with a T-shaped section and comprises a flange and a web plate, and the web plate is located at the center line of the flange and perpendicular to the flange.
After blanking, the straight T-shaped steel is in a flat state, firstly, a row of mounting holes 201 are drilled in the flange on one side of the web plate of the straight T-shaped steel, a row of plug welding holes 202 are drilled in the flange on the other side of the web plate, then, arc rolling operation is carried out on the straight T-shaped steel, the bent T-shaped steel 200 is obtained, and the curvature of the bent T-shaped steel 200 is consistent with that of the side plate 100.
The plug weld holes 202 function to: when the bent T-section steel 200 and the side plate 100 are welded, welding wires are inserted into the plug welding holes 202, and the bent T-section steel 200 and the side plate 100 are connected by plug welding. The mounting holes 201 are used to connect the bent T-section steel 200 to a pillar or the like at the time of subsequent construction.
And holes are drilled when the side plates 100 and the T-shaped steel are in a straight state, so that the drilling difficulty can be reduced.
And A3, preparing a fetal membrane, wherein the fetal membrane is provided with an arc-shaped calibration surface 1, the design curvature of the calibration surface 1 is consistent with that of the side plate 100, the length of the calibration surface 1 is greater than that of the side plate 100, and the width of the calibration surface 1 is greater than that of the side plate 100. Specifically, the membrane comprises an arc-shaped plate and a support frame, the arc-shaped plate is arranged at the top of the support frame, the thickness of the arc-shaped plate is larger than that of the side plate 100, and the upper surface of the arc-shaped plate is the calibration surface 1. And (4) drilling a pin hole in the tire membrane, wherein the position of the pin hole corresponds to the position of the positioning hole 101.
A4, as shown in figures 1 to 4, horizontally placing the tire membrane, enabling the calibration surface 1 to face upwards, placing the side plate 100 on the calibration surface 1 of the tire membrane, enabling the inner side surface of the side plate 100 to be attached to the calibration surface 1, utilizing the balance weight 2 to tightly press and fix the side plate 100 on the calibration surface 1, enabling a web plate of the bent T-shaped steel 200 to face upwards, enabling a flange on one side of the web plate to be attached to the upper surface of the side plate 100, arranging a cushion block 3 between the flange on the other side of the web plate and the calibration surface 1, enabling the curvature of the cushion block 3 to be equal to that of the side plate 100, enabling the thickness of the cushion block 3 to be equal to that of the side plate 100, and tightly pressing and fixing the bent T-shaped steel 200 on the side plate 100 and the cushion block 3 by utilizing a pressing mechanism.
Through setting up counter weight 2, counter weight 2 applys great pressure to curb plate 100, makes curb plate 100 only laminate on calibration face 1, and the shape keeps fixed, can not produce the deformation, and the camber of curb plate 100 can not produce the change, has guaranteed the accuracy of camber. Counter weight 2 can be a steel sheet, and the steel sheet upper surface adds heavy objects such as stone, and in order to improve counter weight 2 to the homogeneity of the pressure of curb plate 100, counter weight 2 is curved support body, the camber of support body is the same with the camber of curb plate 100, and the support body can adopt the great shaped steel welding of size to form.
In order to stably position the side plate 100, after the side plate 100 is placed on the calibration surface 1, the side plate 100 is moved so that the positioning holes 101 of the side plate 100 are aligned with the pin holes of the fetal membrane, and the side plate 100 is positioned by positioning pins inserted through the positioning holes 101 and into the pin holes.
In order to improve the stability of curved T shaped steel 200, adopt curved cushion 3 to support the unsettled edge of a wing of curved T shaped steel 200, compress tightly curved T shaped steel 200 through hold-down mechanism simultaneously and fix on curb plate 100 and cushion 3, hold-down mechanism is including the depression bar 4 of the shape of falling the U, the connecting rod 5 of the one end fixedly connected with L shape of depression bar 4, be provided with vertical locking bolt 6 on the horizontal segment of connecting rod 5, during the use, remove the vertical section of connecting rod 5 to one side of fetal membrane for the horizontal segment of connecting rod 5 stretches into the below of fetal membrane, and the other end of depression bar 4 is located curved T shaped steel 200's top, and rotatory locking bolt 6 makes locking bolt 6 compress tightly with the lower surface of fetal membrane. The hold-down mechanism is a plurality of, improves and compresses tightly the effect. After welding, the pressing mechanism can be detached by loosening the locking bolt 6, and operation is convenient.
And A5, after the side plate 100 and the bent T-shaped steel 200 are fixed, the side plate 100 and the bent T-shaped steel 200 can be welded and connected. During welding, CO2 gas shielded welding is adopted, a plug welding line is formed in the plug welding hole 202 in a welding mode, and then a circumferential welding line between the outer side face of the side plate 100 and the flange of the bent T-shaped steel 200 is welded. The connection strength of the side plate 100 and the bent T-section steel 200 is ensured by the combination of the plug weld and the girth weld.
B. The method comprises the following steps of sequentially carrying out column lower part installation, bottom plate laying, lower part side plate 100 installation, center rack installation, piston system installation, cabinet top system installation, temporary sealing mechanism installation, piston buoyancy, upper part column and upper part side plate 100 installation, gallery installation, ladder installation, elevator shaft installation, diffusing pipe installation, piston descending, oil pump station and pipe installation, accessory equipment installation, coating, concrete pouring in a piston box and debugging.
Wherein, the installation of cage hoist engine is carried out after the installation of cabinet top system is accomplished:
b1, as shown in fig. 5, 6 and 7, a hoisting platform 7 is arranged above a tower 8 on the top of the cabinet, two vertical rows of rail upright columns 9 are arranged between the hoisting platform 7 and the edge of the top of the cabinet, the height of the rail upright columns 9 is gradually reduced from the hoisting platform 7 and the edge of the top of the cabinet, and the upper ends of the rail upright columns 9 are positioned on the same straight line. The rail upright post 9 can adopt various cylinders, preferably, the rail upright post 9 adopts H-shaped steel, the upper end of the H-shaped steel is provided with a top plate 11, the lower end of the H-shaped steel is provided with a bottom plate 12, and the top plate 11 is obliquely arranged so as to be attached to the lower surface of the rail 10.
B2, install a track 10 on two track stands 9 respectively, the one end of track 10 is located the cabinet top edge, and the other end is located hoist platform 7 edge, and two tracks 10 are parallel to each other, and track stand 9 is preferred to link to each other with track 10 through the mode of dismantling the connection, and specifically, the roof 11 of track stand 9 and the lower surface laminating of track 10 link to each other through bolt and track 10.
The track 10 can adopt channel steel or other prior art, and is preferred, the track 10 adopts H shaped steel, sets up polylith evenly distributed's stiffening plate 15 between the both flanges of track 10 to improve intensity, the vertical setting of web of track 10, and the last flange welded connection of track 10 has angle steel 14, and angle steel 14 plays direction and spacing effect, prevents that the cage hoist engine from derailing.
After the rails 10 are installed on the rail upright posts 9, the two rails 10 are connected into a whole by adopting a plurality of connecting beams 13, so that the stability of the two rails 10 is improved, and the connecting beams 13 are connected with the stiffening plates 15 through bolts.
And B3, hoisting the cage winch to the lower end of the track 10 by using the hoisting equipment, wherein the horizontal moving distance of the cage winch is very small as the cage winch is only required to be hoisted to the lower end (namely the edge of the cabinet top) of the track 10, the conventional small hoisting equipment can meet the requirement, large hoisting equipment is not required, and the construction difficulty is reduced. And the lifting device can be arranged outside the gas chamber to work, so that the installation and construction of other equipment are not influenced. The cage hoist is pulled by the chain block to move upwards along the track 10, so that the cage hoist reaches the hoisting platform 7. After the track 10 is arranged, the cage winch can be pulled to move along the track 10 by using the chain block, complex power equipment is not needed, and the convenience of construction is improved.
The track 10 is provided with a plurality of threaded holes, and after the cage winch is pulled to move upwards for a certain distance, bolts are installed in the threaded holes at the rear of the cage winch, so that when the cage winch slips, the rear bolts can block the cage winch, and construction safety is guaranteed.
And B4, installing and fixing the cage winch on a winch platform 7.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The blast furnace gas cabinet installation method is characterized by comprising
A. On-spot preparation stand, curb plate (100), piston system, cabinet top system, ventilative building and elevartor shaft, wherein, the manufacture process of curb plate (100) is:
a1, feeding and discharging steel plates to obtain rectangular side plates (100), and carrying out arc rolling operation on the side plates (100);
a2, feeding and discharging the T-shaped steel to obtain straight T-shaped steel, and performing arc rolling operation on the straight T-shaped steel to obtain bent T-shaped steel (200), wherein the curvature of the bent T-shaped steel (200) is consistent with that of the side plate (100);
a3, preparing a fetal membrane, wherein the fetal membrane is provided with an arc-shaped calibration surface (1), the calibration surface (1) is consistent with the design curvature of the side plate (100), the length of the calibration surface (1) is greater than that of the side plate (100), and the width of the calibration surface is greater than that of the side plate (100);
a4, horizontally placing the tire membrane, enabling the calibration surface (1) to face upwards, placing the side plate (100) on the calibration surface (1) of the tire membrane, enabling the inner side surface of the side plate (100) to be attached to the calibration surface (1), pressing and fixing the side plate (100) on the calibration surface (1) by utilizing a balance weight (2), enabling a web of the bent T-shaped steel (200) to face upwards, enabling a flange on one side of the web to be attached to the upper surface of the side plate (100), arranging a cushion block (3) between a flange on the other side of the web and the calibration surface (1), enabling the curvature of the cushion block (3) to be equal to the curvature of the side plate (100) and the thickness of the side plate (100), and pressing and fixing the bent T-shaped steel (200) on the side plate (100) and the cushion block (3) by utilizing a pressing mechanism;
a5, welding and connecting the side plate (100) and the bent T-shaped steel (200);
B. sequentially carrying out lower part installation of an upright column, bottom plate laying, lower part side plate (100) installation, central rack installation, piston system installation, cabinet top system installation, temporary sealing mechanism installation, piston floating, upper part upright column and upper part side plate (100) installation, corridor installation, ladder installation, elevator shaft installation, diffusing pipe installation, piston descending, oil pump station and pipe installation, accessory equipment installation, coating, concrete pouring in a piston box and debugging;
in the step B, after the cabinet top system is installed, the cage winch is installed:
b1, arranging a hoisting platform (7) above a tower (8) on the top of the cabinet, installing two vertical rows of rail upright columns (9) between the hoisting platform (7) and the edge of the top of the cabinet, gradually reducing the height of the rail upright columns (9) from the hoisting platform (7) and the edge of the top of the cabinet, and enabling the upper ends of the rail upright columns (9) on each row to be located on the same straight line;
b2, installing a rail (10) on each of the two rows of rail columns (9), wherein one end of each rail (10) is positioned on the edge of the top of the cabinet, the other end of each rail (10) is positioned on the edge of the hoisting platform (7), and the two rails (10) are parallel to each other;
b3, hoisting the cage winch to the lower end of the track (10) by using hoisting equipment, and pulling the cage winch to move upwards along the track (10) by using a chain block to enable the cage winch to reach a winch platform (7);
and B4, installing and fixing the cage winch on a winch platform (7).
2. The blast furnace gas cabinet installation method according to claim 1, wherein in step A1, the rectangular side plates (100) are obtained by continuous shearing and blanking through a profiling, the length and width errors of the rectangular side plates (100) are less than 4mm, and the unevenness is less than or equal to 4mm.
3. The blast furnace gas holder installation method according to claim 1, wherein in step A1, the positioning holes (101) are drilled in the side plates (100), and then arc rolling is performed;
in the step A2, firstly drilling a row of mounting holes (201) on the flange on one side of a web plate of the straight T-shaped steel, drilling a row of plug welding holes (202) on the flange on the other side of the web plate, and then performing arc rolling operation on the straight T-shaped steel;
in the step A3, a pin hole is drilled in the tire membrane, the position of the pin hole corresponds to that of the positioning hole (101), and in the step A4, a positioning pin penetrates through the positioning hole (101) and the pin hole to position the side plate;
and step A5, plug welding is carried out through the plug welding holes (202), so that the side plate (100) and the bent T-shaped steel (200) are welded and connected.
4. The blast furnace gas cabinet installation method according to claim 1, wherein in the step A4, the pressing mechanism comprises an inverted U-shaped pressing rod (4), one end of the pressing rod (4) is fixedly connected with an L-shaped connecting rod (5), a vertical locking bolt (6) is arranged on the horizontal section of the connecting rod (5), when in use, the vertical section of the connecting rod (5) is moved to one side of the fetal membrane, so that the horizontal section of the connecting rod (5) extends into the lower part of the fetal membrane, the other end of the pressing rod (4) is positioned above the bent T-shaped steel (200), and the locking bolt (6) is rotated to press the locking bolt (6) against the lower surface of the fetal membrane.
5. The blast furnace gas cabinet installation method according to claim 1, characterized in that in step A4, the counterweight (2) is an arc-shaped frame body, and the curvature of the frame body is the same as that of the side plate (100).
6. The blast furnace gas holder installation method according to claim 1, wherein the rail upright (9) is made of H-shaped steel, the upper end of the H-shaped steel is provided with a top plate (11), the lower end of the H-shaped steel is provided with a bottom plate (12), the top plate (11) is obliquely arranged and is attached to the lower surface of the rail (10), and the top plate (11) is connected with the rail (10) through a bolt.
7. The blast furnace gas holder installation method according to claim 1, characterized in that in step B2, after the rails (10) are installed on the rail uprights (9), the two rails (10) are connected together by a plurality of connecting beams (13).
8. The blast furnace gas cabinet installation method according to claim 1, characterized in that the rail (10) is made of H-shaped steel, a plurality of stiffening plates (15) are uniformly distributed between two flanges of the rail (10), the web of the rail (10) is vertically arranged, and the upper flange of the rail (10) is welded with angle steel (14).
9. The blast furnace gas holder installation method according to claim 1, wherein the rail (10) is provided with a plurality of threaded holes, and in step B3, bolts are installed in the threaded holes at the rear of the cage winding machine after the cage winding machine is pulled up a certain distance.
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Address after: No. 350, Renmin Street, East District, Panzhihua City, Sichuan Province, 617099 Applicant after: CHINA 19TH METALLURGICAL Corp. Address before: 617099 China 19th Metallurgical Group Co., Ltd., bingcaogang, East District, Panzhihua City, Sichuan Province Applicant before: CHINA 19TH METALLURGICAL Corp. |
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