CN111517621A - Construction method for constructing crown of oxy-fuel glass melting furnace - Google Patents
Construction method for constructing crown of oxy-fuel glass melting furnace Download PDFInfo
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- CN111517621A CN111517621A CN202010419747.6A CN202010419747A CN111517621A CN 111517621 A CN111517621 A CN 111517621A CN 202010419747 A CN202010419747 A CN 202010419747A CN 111517621 A CN111517621 A CN 111517621A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/425—Preventing corrosion or erosion
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
Abstract
A construction method for constructing a main arch of a total oxygen glass melting furnace, which relates to the technical field of glass melting furnace construction, comprises the following steps: s1, checking and accepting arch slag beams, installing and paying off, S2, assembling and erecting a support frame, S3, assembling a steel membrane arch tire, S4, hoisting the steel mould arch tire in place, S5, installing and adjusting the arch slag bricks, S6, installing and adjusting the arch bricks, S7, tightening an arch, removing the steel mould arch tire, S8, moving the steel mould arch tire and the support frame, and S9, removing the steel mould arch tire and the support frame. The main arch masonry construction method improves the construction quality and the construction efficiency of the main arch of the oxy-fuel furnace and ensures the normal operation of the main arch of the furnace.
Description
Technical Field
The invention relates to the technical field of glass melting furnace masonry, in particular to a construction method for masonry of a main crown of a full-oxygen glass melting furnace.
Background
The main arch of the melting furnace of the total oxygen kiln is a key part with the highest technical content and technical requirement of a glass production line of the total oxygen kiln, the main arch is composed of a plurality of sections of independent arches, arch bricks are made of electro-fused corundum bricks and electro-fused bricks, the size of the bricks is large, the weight of each brick is heavy, the weight of each brick reaches 400kg, the construction of the next ring can be carried out after the single-ring construction is finished until the construction of the whole main arch is finished, so that the construction quality of each ring directly influences the construction progress of the subsequent ring construction, and the construction quality of the main arch has great influence on the normal operation and the product quality of the production line;
the Chinese invention patent with the publication number of CN103466917A discloses a construction method of an electric melting AZS or an electric melting corundum brick arch of a full oxygen glass melting furnace, which more generally introduces the arch center as an integrated structure, and builds the arch brick process by moving a steel frame and the arch center one by one, but does not introduce the arch center brick installation and arch tightening process, and also lacks necessary building construction parameters and inspection standards, so that a plurality of irregular construction problems can occur, more importantly, in the current construction process, because the integrated arch center has larger span, the transportation and the hoisting are difficult, the construction efficiency is influenced, and the arch center structure is rarely used; in view of the importance and the particularity of the main arch of the total oxygen kiln, the traditional rough and outdated construction method can not meet the requirements of customers, and a brand-new construction technology is formed according to the accumulation of the masonry construction experience of a plurality of main arches of the total oxygen kiln in order to keep the leading position in the glass installation industry and obtain better economic benefit.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a crown masonry construction method of an oxy-fuel glass melting furnace, which improves the construction quality and the construction efficiency of a crown of the oxy-fuel glass melting furnace and ensures the normal operation of the crown of the melting furnace.
In order to achieve the purpose, the invention adopts the following technical scheme:
a construction method for constructing a main arch of a total oxygen glass melting furnace specifically comprises the following steps:
s1, checking and accepting arch ballast beams, installing and paying off: checking and accepting the steel structure of the arch ballast beam before construction, and ensuring that the span, the central line and the arch foot angle of the arch ballast beam meet the design requirements; wherein the span deviation of the arch ballast beams is less than or equal to +/-2 mm, the center line deviation is less than or equal to +/-3 mm, the angle deviation is less than or equal to +/-1 degree, and the staggering of two adjacent arch ballast beams is less than or equal to 1 mm; taking the longitudinal center of the melting furnace determined according to the design of the glass melting furnace as a reference, and releasing the longitudinal center line and the transverse center line of the main crown of the melting furnace on the bottom brick of the furnace tank by using a theodolite, wherein the transverse center line generally corresponds to the axis position of a smoke outlet of the melting furnace; determining the positioning center line of the steel membrane arch tire by taking the longitudinal center line and the transverse center line of the melting furnace as references, and determining the positioning center line of each ring arch brick by using a steel disc ruler;
s2, assembling and erecting a support frame: erecting a support frame of the steel mould arch tire by using scaffold tubes, wherein the width of the support frame is the sum of the width of the steel mould arch tire and the width of operating platforms at two sides, and the width of the operating platform is generally 1.8-2 m; a plurality of groups of moving wheels are additionally arranged at the bottom of the support frame according to the span of the main arch, and a guide rail along the longitudinal direction of the main arch of the melting furnace is laid below the moving wheels for supporting and moving; the supporting frame comprises a plurality of vertical steel pipes, a height adjusting jackscrew is mounted at the top end of each vertical steel pipe, and the height of the height adjusting jackscrew is adjusted to keep the top surface of the supporting frame horizontal and flat;
s3, assembling the steel membrane arch tire: the steel mould arch tire is divided into two sections of steel moulds convenient for transportation along the radial center line of the steel mould arch tire, and the two sections of steel moulds are detachably and fixedly connected through a bolt assembly; when the steel moulds are assembled and connected on site, firstly, a wood board or a brick is laid on the bottom of the steel film to ensure that the wood board or the brick is flat and consistent in elevation, bolts are penetrated in bolt holes corresponding to the two sections of steel moulds, then, the radian surfaces of the radii of the upper parts of the two sections of steel moulds are adjusted to be tight by the radian clamping plates, and then bolt assemblies are screwed down;
s4, hoisting the steel die arch tire in place: the connected steel membrane arch tire is hung on the support frame by using a truck crane, and the position, elevation and levelness of the top surface of the steel membrane arch tire are adjusted to meet the design requirements; the acceptance standard of the installation quality of the steel mould arch tire is as follows: the allowable deviation between the longitudinal central line of the steel die arch tire and the longitudinal central line of the melting furnace is +/-3.0 mm, the allowable deviation of the elevation is 0-5 mm, the arch height of the steel die arch tire is about 2mm higher than the design requirement, and the arch brick is prevented from sinking; after the adjustment is qualified, limiting and fixing the arch tire of the steel die by using a steel pipe, and bundling the arch tire on a support frame by using an iron wire for fixing;
s5, installing and adjusting arch slag bricks: before building, the support frame is firstly cushioned, so that the movable wheels are not stressed; hoisting the arch ballast bricks in place according to the determined arch brick center line, and checking and accepting the installation quality of the arch ballast bricks; placing ceramic fiber paper between arch slag bricks and arch slag beams, adjusting the centers of the bricks to be aligned, adjusting a backing plate under the arch slag bricks to enable the gap between the arch slag bricks and a breast wall to be 16-18 mm, adjusting a jackscrew mechanism on the arch slag beams to enable the inclined plane inclination angle of the arch slag bricks to reach a design angle, and after the arch slag bricks are adjusted to be qualified, using a wood wedge to pad the arch slag bricks on the breast wall, wherein at least two points are padded under each arch slag brick;
s6, installing and adjusting arch bricks: after the arch ballast bricks are installed, the arch bricks of the same ring are built; the first arch brick of each ring needs to be accurately positioned, and the side surface of each ring needs to be parallel to the transverse central line of the melting furnace and is vertical to the longitudinal central line; the masonry construction of the arch bricks is carried out according to the serial numbers of the arch bricks, and the arch bricks cannot be misplaced; after the arch brick is firmly fixed by a flexible hoisting belt, the arch brick is slowly hoisted on a steel mould arch tire by a truck crane; after the steel mould arch support is adjusted to be stable, the hoisting belt is removed, arch support wires on the steel mould arch support are adjusted, so that the contact between arch bricks is tight, and the installation quality of the arch bricks is checked; checking that the dislocation of the lower surface of the arch brick is less than 2mm, detecting the levelness of the top surface and the verticality of the side surface of the arch brick by using a horizontal ruler, wherein the deviation of the verticality and the levelness is less than 1mm, if the deviation exists, adjusting the jackscrew of the arch tire to ensure that the arch brick is correctly installed, and installing the next arch brick after the adjustment is qualified until the installation of one ring of arch bricks is finished;
s7, tightening and removing the steel die arch: a. after the installation of the ring brick is finished, the integral quality of the single-ring arch brick is checked, and the arch is tightened after the flatness and the brick joints of the integral ring brick are checked to meet the requirements; b. before the wire jacking mechanism and the brace mechanism are tightened, a scale is placed on the arch brick, the elevation value of the arch brick is measured by a level gauge, and the record is made; c. before the wire-jacking mechanism and the brace mechanism are tightened, a backing plate under arch slag bricks is removed, and the inclined strut outside the upright post is cut; d. before the wire jacking mechanism is tightened, the brace mechanism is firstly tightened, and then the wire jacking mechanism is tightened; c. when the jack screw mechanism is tightened, two sides are alternately performed to prevent jack deviation; d. in the process of tightening the jackscrew mechanism, the changes of the brick joints, the end surfaces, the elevations and the stand column spacing need to be observed in time and adjusted in time, if the design requirements cannot be met, the jackscrew mechanism needs to be loosened and then the arch brick needs to be adjusted, and then the jackscrew is tightened after the requirements are met; e. the arch height of the arch brick is raised by 2-3 mm through the jack screw tightening mechanism, the arch brick stops tightening after leaving the arch tyre jack screw on the steel mould arch tyre, whether the arch brick sinks, deforms, partially sinks and the like is checked, the span, the arch height and the elevation of the arch brick are measured after the arch brick is qualified, and after the arch brick reaches the design requirement, the arch brick seam is sealed by using an adhesive tape;
s8, moving the steel die arch tire and the support frame: after the masonry of one ring of arch bricks is finished, moving the steel mould arch tire and the support frame to the position of the next ring of arch bricks together to prepare for masonry of the next ring of arch bricks; firstly, loosening a crown tire top thread on a steel mold crown tire downwards to be far away from a crown brick, slightly lifting a support frame of the steel mold crown tire by using a manual hydraulic forklift, removing a fixed backing plate at the bottom end of the support frame, then dropping the support frame on a guide rail, stressing a moving wheel, cleaning barriers such as bricks, backing plates and the like on site, and moving the steel mold support frame; when the steel mould supporting frame is moved, a constructor pushes the steel mould supporting frame at the inner side to enable the steel mould supporting frame to slowly move along the guide rail, and the force of two ends is uniform, so that the steel mould supporting deflection is prevented; adjusting the steel mould arch tire in place according to the position of the next ring of arch slag bricks, checking that the elevation, the levelness of the arch top surface and the like meet the requirements, then backing up and fixing the support frame to ensure that the movable wheel is not stressed, and then carrying out masonry construction of the arch bricks;
s9, removing the steel die arch tire and the support frame: after the whole glass melting furnace main arch is built, the steel mould arch tire and the support frame are sequentially removed, and the installation quality of the melting furnace main arch is checked according to the checking standard.
Further, in the step of checking, accepting, installing and paying off the S1 arch ballast beam, the determined longitudinal and transverse center reference lines for main arch masonry installation are thrown to proper positions of workshops at two ends and on the side face of the melting furnace by using a theodolite, and permanent marks are made.
Further, in the steps of assembling and erecting the S2 support frame and assembling the S3 steel membrane arch tire, bracing wires are symmetrically arranged on two sides of the support frame and the steel membrane arch tire after the support frame and the steel membrane arch tire are assembled and positioned, so that the support frame and the steel membrane arch tire are prevented from toppling over.
Further, the first ring brick of the whole melting furnace main arch is installed and is used as a reference for assembling and setting up the support frame and hoisting a steel mould arch tire in place before the step of assembling and setting up the support frame at S2, and the installation method is consistent with that in the step of installing and adjusting the S5 arch bricks; in the step of assembling and setting up the support frame S2, the top surface of the support frame is lower than the bottom surface of the first arch ballast brick by adjusting the height adjusting jackscrew; in the step of hoisting the steel mould arch tire in place of S4, the position and elevation of the steel mould arch tire need to be aligned and matched with the first arch ballast brick.
Further, the steel mould arch tyre mainly comprises top arc steel and a bottom steel base to form an arch structure, a support steel bar is arranged between the arc steel and the steel base, flat steel for placing arch bricks is arranged in the radial middle of the upper arc surface of the arc steel, and a plurality of arch tyre jackscrews are uniformly arranged at positions of the upper arc surface corresponding to two sides of the flat steel.
Further, the radian clamping plate used in the assembly of the S3 steel die arch tire is a wood plate or a steel plate manufactured according to the design radian of the steel film arch tire.
Further, in the step of installing and adjusting the S6 arch bricks, the installation of the arch bricks on two sides of the same ring of the main arch is carried out synchronously so as to ensure the balance of the steel mould arch tyre, and the deviation of the masonry progress on two sides does not exceed three.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention discloses a main arch masonry construction method of a total oxygen glass melting furnace, aiming at the construction characteristics of the main arch independent single ring arch masonry of the total oxygen glass melting furnace, scientifically adopting a movable and adjustable steel mould arch tire and a main arch masonry and detection process according to the principles of mounting science and measurement science, reducing the accumulated error of arch bricks and ensuring the installation quality of each ring of arch bricks; the correct displacement of the steel mould arch tire is carried out to complete the masonry of each ring arch brick, thereby improving the construction quality of the main arch of the total oxygen kiln, ensuring the normal operation of the main arch of the kiln and gaining the favorable comment of construction units; effectively shortens the construction period of the main arch of the total oxygen kiln, reduces labor cost, mechanical cost and management cost, and reduces the construction cost by about 6 percent compared with the traditional construction method. Meanwhile, the investment of construction units can bring benefits into play as early as possible, the normal operation of the melting furnace is ensured, and the maintenance cost is reduced.
Drawings
FIG. 1 is a schematic view of the construction process of the present invention;
FIG. 2 is a schematic plan view of a steel arch form of a main arch;
FIG. 3 is a schematic elevation view of a steel arch form for constructing a main arch;
figure 4 is a schematic view of the radian card structure.
Detailed Description
The present invention will be explained in detail by the following examples, which are intended to disclose the invention and protect all technical improvements within the scope of the invention, and the invention is not limited to the following examples; in the description of the present invention, it should be understood that, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., which corresponds to the drawings of the present application, the present invention is described for convenience, but does not indicate or imply that the indicated device or element must have a particular orientation:
the main crown masonry construction method of the oxy-fuel glass melting furnace described in the attached figures 1-4 specifically comprises the following steps:
s1, checking and accepting arch ballast beams, installing and paying off: checking and accepting the steel structure of the arch ballast beam before construction, and ensuring that the span, the central line and the arch foot angle of the arch ballast beam meet the design requirements; wherein the span deviation of the arch ballast beams is less than or equal to +/-2 mm, the center line deviation is less than or equal to +/-3 mm, the angle deviation is less than or equal to +/-1 degree, and the staggering of two adjacent arch ballast beams is less than or equal to 1 mm; taking the longitudinal center of the melting furnace determined according to the design of the glass melting furnace as a reference, and releasing the longitudinal center line and the transverse center line of the main crown of the melting furnace on the bottom brick of the furnace tank by using a theodolite, wherein the transverse center line generally corresponds to the axis position of a smoke outlet of the melting furnace; determining the positioning center line of the steel membrane arch tire by taking the longitudinal center line and the transverse center line of the melting furnace as references, and determining the positioning center line of each ring arch brick by using a steel disc ruler; according to the requirement, in the steps of checking, accepting, installing and paying off the S1 arch slag beam, throwing the determined longitudinal and transverse center datum line for the main arch masonry installation to the proper positions of workshops at two ends and on the side surface of the melting furnace by using a theodolite, and making a permanent mark;
s2, assembling and erecting a support frame: erecting a support frame of the steel mould arch tire by using scaffold tubes, wherein the width of the support frame is the sum of the width of the steel mould arch tire and the width of operating platforms at two sides, and the width of the operating platform is generally 1.8-2 m; a plurality of groups of moving wheels are additionally arranged at the bottom of the support frame according to the span of the main arch, and a guide rail along the longitudinal direction of the main arch of the melting furnace is laid below the moving wheels for supporting and moving; the supporting frame comprises a plurality of vertical steel pipes, a height adjusting jackscrew is mounted at the top end of each vertical steel pipe, and the height of the height adjusting jackscrew is adjusted to keep the top surface of the supporting frame horizontal and flat;
s3, assembling the steel membrane arch tire: the steel mould arch tire is divided into two sections of steel moulds convenient to transport along the radial central line of the steel mould arch tire, the two sections of steel moulds are detachably and fixedly connected through a bolt assembly, in addition, the steel mould arch tire mainly forms an arch structure by top arc steel and a bottom steel seat, a supporting steel bar is arranged between the arc steel and the steel seat, flat steel used for placing arch bricks is arranged in the radial middle of the upper arc surface of the arc steel, a plurality of arch tire top wires are uniformly arranged at positions of the upper arc surface corresponding to the two sides of the flat steel, the flat steel is used for supporting the arch bricks, and the arch tire top wires at the two sides can be conveniently adjusted; when the steel moulds are assembled and connected on site, firstly, a wood board or a brick is laid on the bottom of the steel film to ensure that the wood board or the brick is flat and consistent in elevation, bolts are penetrated in bolt holes corresponding to the two sections of steel moulds, then, the radian surfaces of the radii of the upper parts of the two sections of steel moulds are adjusted to be tight by the radian clamping plates, and then bolt assemblies are screwed down; in addition, the radian clamping plate is a wood plate or a steel plate which is manufactured in advance according to the design radian of the steel membrane arch tire; according to requirements, in the steps of assembling and erecting the S2 support frame and assembling the S3 steel membrane arch tire, bracing wires are symmetrically arranged on two sides of the assembled and positioned support frame and the steel membrane arch tire to prevent the support frame and the steel membrane arch tire from toppling;
s4, hoisting the steel die arch tire in place: the connected steel membrane arch tire is hung on the support frame by using a truck crane, and the position, elevation and levelness of the top surface of the steel membrane arch tire are adjusted to meet the design requirements; the acceptance standard of the installation quality of the steel mould arch tire is as follows: the allowable deviation between the longitudinal central line of the steel die arch tire and the longitudinal central line of the melting furnace is +/-3.0 mm, the allowable deviation of the elevation is 0-5 mm, the arch height of the steel die arch tire is about 2mm higher than the design requirement, and the arch brick is prevented from sinking; after the adjustment is qualified, limiting and fixing the arch tire of the steel die by using a steel pipe, and bundling the arch tire on a support frame by using an iron wire for fixing;
s5, installing and adjusting arch slag bricks: before building, the support frame is firstly cushioned, so that the movable wheels are not stressed; hoisting the arch ballast bricks in place according to the determined arch brick center line, and checking and accepting the installation quality of the arch ballast bricks; placing ceramic fiber paper between arch slag bricks and arch slag beams, adjusting the centers of the bricks to be aligned, adjusting a backing plate under the arch slag bricks to enable the gap between the arch slag bricks and a breast wall to be 16-18 mm, adjusting a jackscrew mechanism on the arch slag beams to enable the inclined plane inclination angle of the arch slag bricks to reach a design angle, and after the arch slag bricks are adjusted to be qualified, using a wood wedge to pad the arch slag bricks on the breast wall, wherein at least two points are padded under each arch slag brick; according to the requirement, the first ring brick of the whole melting furnace main arch is installed and is used as a reference for assembling and setting up the support frame and hoisting a steel mould arch tire in place before the step of assembling and setting up the support frame of S2, and the installation method is consistent with the method in the step of installing and adjusting the S5 arch bricks; in the step of assembling and setting up the support frame S2, the top surface of the support frame is lower than the bottom surface of the first arch ballast brick by adjusting the height adjusting jackscrew; in the step of hoisting the steel mould arch tire in place of S4, the position and elevation of the steel mould arch tire need to be aligned and matched with the first arch ballast brick;
s6, installing and adjusting arch bricks: after the arch ballast bricks are installed, the arch bricks of the same ring are built; the first arch brick of each ring needs to be accurately positioned, and the side surface of each ring needs to be parallel to the transverse central line of the melting furnace and is vertical to the longitudinal central line; the masonry construction of the arch bricks is carried out according to the serial numbers of the arch bricks, and the arch bricks cannot be misplaced; after the arch brick is firmly fixed by a flexible hoisting belt, the arch brick is slowly hoisted on a steel mould arch tire by a truck crane; after the steel mould arch support is adjusted to be stable, the hoisting belt is removed, arch support wires on the steel mould arch support are adjusted, so that the contact between arch bricks is tight, and the installation quality of the arch bricks is checked; checking that the dislocation of the lower surface of the arch brick is less than 2mm, detecting the levelness of the top surface and the verticality of the side surface of the arch brick by using a horizontal ruler, wherein the deviation of the verticality and the levelness is less than 1mm, if the deviation exists, adjusting the jackscrew of the arch tire to ensure that the arch brick is correctly installed, and installing the next arch brick after the adjustment is qualified until the installation of one ring of arch bricks is finished; according to the requirement, in the step of installing and adjusting the arch bricks of S6, the installation of the arch bricks on two sides of the same ring of the main arch is carried out synchronously so as to ensure the balance of the arch tires of the steel mould, and the deviation of the masonry progress on two sides does not exceed three;
s7, tightening and removing the steel die arch: a. after the installation of the ring brick is finished, the integral quality of the single-ring arch brick is checked, and the arch is tightened after the flatness and the brick joints of the integral ring brick are checked to meet the requirements; b. before the wire jacking mechanism and the brace mechanism are tightened, a scale is placed on the arch brick, the elevation value of the arch brick is measured by a level gauge, and the record is made; c. before the wire-jacking mechanism and the brace mechanism are tightened, a backing plate under arch slag bricks is removed, and the inclined strut outside the upright post is cut; d. before the wire jacking mechanism is tightened, the brace mechanism is firstly tightened, and then the wire jacking mechanism is tightened; c. when the jack screw mechanism is tightened, two sides are alternately performed to prevent jack deviation; d. in the process of tightening the jackscrew mechanism, the changes of the brick joints, the end surfaces, the elevations and the stand column spacing need to be observed in time and adjusted in time, if the design requirements cannot be met, the jackscrew mechanism needs to be loosened and then the arch brick needs to be adjusted, and then the jackscrew is tightened after the requirements are met; e. the arch height of the arch brick is raised by 2-3 mm through the jack screw tightening mechanism, the arch brick stops tightening after leaving the arch tyre jack screw on the steel mould arch tyre, whether the arch brick sinks, deforms, partially sinks and the like is checked, the span, the arch height and the elevation of the arch brick are measured after the arch brick is qualified, and after the arch brick reaches the design requirement, the arch brick seam is sealed by using an adhesive tape;
s8, moving the steel die arch tire and the support frame: after the masonry of one ring of arch bricks is finished, moving the steel mould arch tire and the support frame to the position of the next ring of arch bricks together to prepare for masonry of the next ring of arch bricks; firstly, loosening a crown tire top thread on a steel mold crown tire downwards to be far away from a crown brick, slightly lifting a support frame of the steel mold crown tire by using a manual hydraulic forklift, removing a fixed backing plate at the bottom end of the support frame, then dropping the support frame on a guide rail, stressing a moving wheel, cleaning barriers such as bricks, backing plates and the like on site, and moving the steel mold support frame; when the steel mould supporting frame is moved, a constructor pushes the steel mould supporting frame at the inner side to enable the steel mould supporting frame to slowly move along the guide rail, and the force of two ends is uniform, so that the steel mould supporting deflection is prevented; adjusting the steel mould arch tire in place according to the position of the next ring of arch slag bricks, checking that the elevation, the levelness of the arch top surface and the like meet the requirements, then backing up and fixing the support frame to ensure that the movable wheel is not stressed, and then carrying out masonry construction of the arch bricks;
s9, removing the steel die arch tire and the support frame: after the whole glass melting furnace main arch is built, the steel mould arch tire and the support frame are sequentially removed, and the installation quality of the melting furnace main arch is checked and accepted according to the checking and accepting standard, which meets the industrial furnace building engineering construction and checking and accepting standard GB 50211-2014 and the industrial furnace building engineering quality checking and accepting standard GB 50309-2007.
Attached table 1: main construction machine equipment meter
| Serial number | Name (R) | Model number | Number of | For construction site |
| 1 | Truck crane | 5～8t | 1 vehicle | Hoisting of steel mould arch tire, arch brick and the like |
| 2 | Forklift truck | 2t | 1 table | Skewback transport |
| 3 | Hand hydraulic fork-lift | 2～3t | 2 table | Skewback transport and steel mould movement |
| 4 | Level gauge | S1 | 1 table | Steel mould arch tire and arch brick installation measurement |
| 5 | Theodolite | 2-JD | 1 table | Central line paying-off for melting furnace |
| 6 | Steel disc ruler | 30m | 1 handle | Measuring and paying off |
| 7 | Horizon rule | 600mm | 4 handles | Skewback detection |
| 8 | Steel plate ruler | 500mm | 2 handle | Measuring |
| 9 | Line pendant | 2 are provided with | Center detection | |
| 10 | Plug gauge | 150mm | 2 handle | Brickwork joint measurement |
| 11 | Big wooden hammer | 2 handle | Arch brick installation alignment | |
| 12 | Spanner | 200～300 | 6 handles | Skewback crown screw adjustment |
| 13 | Pipe wrench | 2 handle | Brace fastening | |
| 14 | Gas cutting tool | 1 set of | Temporary support cutting device for steel structure |
Attached table 2: key part and key process quality control point table
| Serial number | Examination item | Tolerance deviation (mm) | Inspection method and inspection device used therefor |
| 1 | Arch tyre longitudinal central line and melting furnace longitudinal central line | ±3.0 | Surveying with theodolite and suspension wire |
| 2 | Arch tire elevation | 0～5 | Measured by a level |
| 3 | Elevation of arch ballast beam | ±1.5 | Measured by a level |
| 4 | Distance between inner side of upright post and longitudinal central line of melting furnace | ±3.0 | Measured with steel disc ruler |
| 5 | Arch ballast brick masonry brick joint | 1.5 | Measuring with feeler gauge and steel plate gauge |
| 6 | Elevation of arch ballast brick | ±1 | Level measuring device for fixed point measurement |
| 7 | Span of arch ballast bricks | ±3.0 | Measured with steel disc ruler |
| 8 | Verticality of arch brick | ±0.5 | Measuring with a horizontal ruler |
| 9 | Flatness of arch tile end face | 1 | Measured by a level |
| 10 | Arch brick joint | 1.5 | Measuring with feelers |
| 11 | Arch height of each ring arch | ±10 | Measured by a level |
| 12 | The gap between two adjacent ring arches | +1 | Measuring with special graduated scales |
The present invention is not described in detail in the prior art.
Claims (7)
1. A construction method for constructing a main crown of a total oxygen glass melting furnace is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, checking and accepting arch ballast beams, installing and paying off: checking and accepting the steel structure of the arch ballast beam before construction, and ensuring that the span, the central line and the arch foot angle of the arch ballast beam meet the design requirements; wherein the span deviation of the arch ballast beams is less than or equal to +/-2 mm, the center line deviation is less than or equal to +/-3 mm, the angle deviation is less than or equal to +/-1 degree, and the staggering of two adjacent arch ballast beams is less than or equal to 1 mm;
taking the longitudinal center of the melting furnace determined according to the design of the glass melting furnace as a reference, and releasing the longitudinal center line and the transverse center line of the main crown of the melting furnace on the bottom brick of the furnace tank by using a theodolite, wherein the transverse center line generally corresponds to the axis position of a smoke outlet of the melting furnace; determining the positioning center line of the steel membrane arch tire by taking the longitudinal center line and the transverse center line of the melting furnace as references, and determining the positioning center line of each ring arch brick by using a steel disc ruler;
s2, assembling and erecting a support frame: erecting a support frame of the steel mould arch tire by using scaffold tubes, wherein the width of the support frame is the sum of the width of the steel mould arch tire and the width of operating platforms at two sides, and the width of the operating platform is generally 1.8-2 m; a plurality of groups of moving wheels are additionally arranged at the bottom of the support frame according to the span of the main arch, and a guide rail along the longitudinal direction of the main arch of the melting furnace is paved below the moving wheels; the supporting frame comprises a plurality of vertical steel pipes, a height adjusting jackscrew is mounted at the top end of each vertical steel pipe, and the height of the height adjusting jackscrew is adjusted to keep the top surface of the supporting frame horizontal and flat;
s3, assembling the steel membrane arch tire: the steel mould arch tire is divided into two sections of steel moulds convenient for transportation along the radial center line of the steel mould arch tire, and the two sections of steel moulds are detachably and fixedly connected through a bolt assembly; when the steel moulds are assembled and connected on site, firstly, a wood board or a brick is laid on the bottom of the steel film to ensure that the wood board or the brick is flat and consistent in elevation, bolts are penetrated in bolt holes corresponding to the two sections of steel moulds, then, the radian surfaces of the radii of the upper parts of the two sections of steel moulds are adjusted to be tight by the radian clamping plates, and then bolt assemblies are screwed down;
s4, hoisting the steel die arch tire in place: the connected steel membrane arch tire is hung on the support frame by using a truck crane, and the position, elevation and levelness of the top surface of the steel membrane arch tire are adjusted to meet the design requirements; the acceptance standard of the installation quality of the steel mould arch tire is as follows: the allowable deviation between the longitudinal central line of the steel die arch tire and the longitudinal central line of the melting furnace is +/-3.0 mm, the allowable deviation of the elevation is 0-5 mm, the arch height of the steel die arch tire is about 2mm higher than the design requirement, and the arch brick is prevented from sinking; after the adjustment is qualified, limiting and fixing the arch tire of the steel die by using a steel pipe, and bundling the arch tire on a support frame by using an iron wire for fixing;
s5, installing and adjusting arch slag bricks: before building, the support frame is firstly cushioned, so that the movable wheels are not stressed; hoisting the arch ballast bricks in place according to the determined arch brick center line, and checking and accepting the installation quality of the arch ballast bricks; placing ceramic fiber paper between arch slag bricks and arch slag beams, adjusting the centers of the bricks to be aligned, adjusting a backing plate under the arch slag bricks to enable the gap between the arch slag bricks and a breast wall to be 16-18 mm, adjusting a jackscrew mechanism on the arch slag beams to enable the inclined plane inclination angle of the arch slag bricks to reach a design angle, and after the arch slag bricks are adjusted to be qualified, using a wood wedge to pad the arch slag bricks on the breast wall, wherein at least two points are padded under each arch slag brick;
s6, installing and adjusting arch bricks: after the arch ballast bricks are installed, the arch bricks of the same ring are built; the first arch brick of each ring needs to be accurately positioned, and the side surface of each ring needs to be parallel to the transverse central line of the melting furnace and is vertical to the longitudinal central line; the masonry construction of the arch bricks is carried out according to the serial numbers of the arch bricks, and the arch bricks cannot be misplaced; after the arch brick is firmly fixed by a flexible hoisting belt, the arch brick is slowly hoisted on a steel mould arch tire by a truck crane; after the steel mould arch support is adjusted to be stable, the hoisting belt is removed, arch support wires on the steel mould arch support are adjusted, so that the contact between arch bricks is tight, and the installation quality of the arch bricks is checked; checking that the dislocation of the lower surface of the arch brick is less than 2mm, detecting the levelness of the top surface and the verticality of the side surface of the arch brick by using a horizontal ruler, wherein the deviation of the verticality and the levelness is less than 1mm, if the deviation exists, adjusting the jackscrew of the arch tire to ensure that the arch brick is correctly installed, and installing the next arch brick after the adjustment is qualified until the installation of one ring of arch bricks is finished;
s7, tightening and removing the steel die arch: a. after the installation of the ring brick is finished, the integral quality of the single-ring arch brick is checked, and the arch is tightened after the flatness and the brick joints of the integral ring brick are checked to meet the requirements; b. before the wire jacking mechanism and the brace mechanism are tightened, a scale is placed on the arch brick, the elevation value of the arch brick is measured by a level gauge, and the record is made; c. before the wire-jacking mechanism and the brace mechanism are tightened, a backing plate under arch slag bricks is removed, and the inclined strut outside the upright post is cut; d. before the wire jacking mechanism is tightened, the brace mechanism is firstly tightened, and then the wire jacking mechanism is tightened; c. when the jack screw mechanism is tightened, two sides are alternately performed to prevent jack deviation; d. in the process of tightening the jackscrew mechanism, the changes of the brick joints, the end surfaces, the elevations and the stand column spacing need to be observed in time and adjusted in time, if the design requirements cannot be met, the jackscrew mechanism needs to be loosened and then the arch brick needs to be adjusted, and then the jackscrew is tightened after the requirements are met; e. the arch height of the arch brick is raised by 2-3 mm through the jack screw tightening mechanism, the arch brick stops tightening after leaving the arch tyre jack screw on the steel mould arch tyre, whether the arch brick sinks, deforms, partially sinks and the like is checked, the span, the arch height and the elevation of the arch brick are measured after the arch brick is qualified, and after the arch brick reaches the design requirement, the arch brick seam is sealed by using an adhesive tape;
s8, moving the steel die arch tire and the support frame: after the masonry of one ring of arch bricks is finished, moving the steel mould arch tire and the support frame to the position of the next ring of arch bricks together to prepare for masonry of the next ring of arch bricks; firstly, loosening a crown tire top thread on a steel mold crown tire downwards to be far away from a crown brick, slightly lifting a support frame of the steel mold crown tire by using a manual hydraulic forklift, removing a fixed backing plate at the bottom end of the support frame, then dropping the support frame on a guide rail, stressing a moving wheel, cleaning barriers such as bricks, backing plates and the like on site, and moving the steel mold support frame; when the steel mould supporting frame is moved, a constructor pushes the steel mould supporting frame at the inner side to enable the steel mould supporting frame to slowly move along the guide rail, and the force of two ends is uniform, so that the steel mould supporting deflection is prevented; adjusting the steel mould arch tire in place according to the position of the next ring of arch slag bricks, checking that the elevation, the levelness of the arch top surface and the like meet the requirements, then backing up and fixing the support frame to ensure that the movable wheel is not stressed, and then carrying out masonry construction of the arch bricks;
s9, removing the steel die arch tire and the support frame: after the whole glass melting furnace main arch is built, the steel mould arch tire and the support frame are sequentially removed, and the installation quality of the melting furnace main arch is checked according to the checking standard.
2. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: and in the steps of checking, accepting, installing and paying off the S1 arch slag beam, throwing the determined longitudinal and transverse center reference lines for arch masonry installation to proper positions of workshops at two ends and on the side surface of the melting furnace by using a theodolite, and making a permanent mark.
3. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: in the steps of assembling and erecting the S2 support frame and assembling the S3 steel membrane arch tire, bracing wires are symmetrically arranged on two sides of the assembled and positioned support frame and the steel membrane arch tire to prevent the support frame and the steel membrane arch tire from toppling over.
4. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: the first ring brick of the whole melting furnace main arch is installed and needs to be placed before the S2 support frame assembling and erecting step, and the installation method is the same as the method in the S5 arch brick installation and adjustment step as the reference for the support frame assembling and erecting and the steel mould arch tire hoisting in position; in the step of assembling and setting up the support frame S2, the top surface of the support frame is lower than the bottom surface of the first arch ballast brick by adjusting the height adjusting jackscrew; in the step of hoisting the steel mould arch tire in place of S4, the position and elevation of the steel mould arch tire need to be aligned and matched with the first arch ballast brick.
5. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: the steel mould arch tire mainly forms an arch structure by top arc steel and a bottom steel seat, a support steel bar is arranged between the arc steel and the steel seat, flat steel for placing arch bricks is arranged in the radial middle of the upper arc surface of the arc steel, and a plurality of arch tire jackscrews are uniformly arranged at positions of the upper arc surface corresponding to the two sides of the flat steel.
6. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: the radian clamping plate used in the assembly of the S3 steel die arch tire is a wood plate or a steel plate manufactured according to the design radian of the steel film arch tire.
7. The crown masonry construction method for a oxy-fuel glass melting furnace as set forth in claim 1, wherein: in the step of installing and adjusting the S6 arch bricks, the installation of the arch bricks on two sides of the same ring of the main arch is carried out synchronously so as to ensure the balance of the steel mould arch tyre, and the deviation of the masonry progress on two sides does not exceed three.
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| CN111517621B (en) | 2022-06-03 |
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