CN113668305B - Measuring and installing method for door type semi-door type tundish car track - Google Patents
Measuring and installing method for door type semi-door type tundish car track Download PDFInfo
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- CN113668305B CN113668305B CN202110730016.8A CN202110730016A CN113668305B CN 113668305 B CN113668305 B CN 113668305B CN 202110730016 A CN202110730016 A CN 202110730016A CN 113668305 B CN113668305 B CN 113668305B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B35/00—Applications of measuring apparatus or devices for track-building purposes
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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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention relates to a measuring and installing method of a door type and semi-door type tundish car track; comprises an adjusting backing plate setting; preliminary paving of the segmented track; welding a rail positioning stop block; initially adjusting the central line of the track; welding a segmented track; welding a track pressing plate base; track elevation is finely adjusted by initially adjusting track elevation; track levelness adjustment; fine tuning the center line of the track; the rail pressing plate is fastened; checking and accepting the track; track installation ending; and (5) grouting the rail. Compared with the traditional tundish car track installation adjustment, the method ensures the accuracy of the installation of the door type and semi-door type tundish car track, reduces the safety risk caused by the installation, reduces the construction difficulty and effectively shortens the construction period.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment construction, in particular to a measuring and installing method of a door-type and semi-door-type tundish car track.
Background
The continuous casting machine mainly comprises a casting system and a casting system, and the tundish car is a bearing device for supporting, transporting and replacing the tundish. The quality of the track installation of the tundish car directly influences whether the tundish car can run smoothly. The rails of the door type tundish car are arranged at the two sides of the inner arc and the outer arc of the crystallizer, the car spans over the crystallizer, the water gap is positioned in the main beam of the car, and the gravity center of the tundish is positioned between the two rails, so that the car body is stressed reasonably and stably; but the operator is not very convenient to observe the crystallizer liquid level and add the protecting slag. The semi-portal tundish car is positioned on the outer arc side of the crystallizer, the inner arc side rail of the semi-portal tundish car is arranged on the overhead beam, and the outer arc side rail is paved on the casting platform. The tundish car runs rapidly, the space above the crystallizer for operation is large, the liquid level of the crystallizer is convenient to observe, and the operation is convenient. But the center of the structure is offset, the vehicle is unstable, a counterweight or a reverse tilting moment structure is required to be added at the other end of the vehicle body, and meanwhile, the requirement on the track installation precision is higher. The conventional door-type and semi-door-type tundish car track measurement and installation method has low adjustment precision, and large deformation after the track is stressed in the later production process, so that the normal operation and production of the tundish car are affected.
Disclosure of Invention
The invention aims to overcome the defects and provides a method for measuring and installing a door-type and semi-door-type tundish car track, which is safe, reliable, convenient to construct and low in cost.
In order to achieve the above object, the present invention is achieved by:
a method for measuring and installing a door-shaped and semi-door-shaped tundish car track comprises the following steps of
Step 1, preparing construction;
step 1.1, track installation and construction preparation comprises technical mating, track Liang Fuce, material and machine tool preparation and equipment entrance acceptance;
step 1.2, technical mating: a separate technical bottom card is compiled in advance, and professional technicians carry out written technical bottoms on all the constructors involved, including drivers driving the traveling vehicles;
step 1.3, track Liang Fuce: according to the relevant data of the installation result of the steel structure platform track beam of the process of the previous working procedure, using equipment to install a buried datum point, namely a permanent datum point on the concrete of the ladle turret, casting a tangent line (namely a central standard plate of a casting arc line, measuring the elevation and the central line of the central position of the upper surface of the track beam, calculating to obtain data, comparing the data, and enabling the track beam to meet the track construction requirement of a tundish car;
the preparation of the materials and the tools in the step 1.4 mainly comprises the following steps:
1) The adjusting backing plate is made of stainless steel and is corrosion-resistant, and the specifications are 200×150×0.3, 200×150×0.5, 200×150×1, 200×150×2 and 200×150×5, and the units are: mm; quantity: according to the data of the track Liang Fuce, presetting processing by combining the number of the track pressing plate groups;
2) Two sets of auxiliary central line steel wires and accessories, including special line weight for equipment adjustment, tensioner, line wheel and steel structure bracket; requiring the steel wire phi to be 0.5mm;
3) Track positioning stops 150×25×25; slant wedge 150×25×20×10, number: 4 times of track number of the tundish car transported to the site in a segmented way, and the unit is as follows: mm;
4) Two sets of precision level, theodolite and arc welding equipment and two sets of oxygen and acetylene gas cutting tools;
5) A steel wire safety rope with the diameter of phi 8mm is hung on an arc side track beam in the semi-portal tundish car, and safety protection measures are needed at the opening of a vibrating frame of a crystallizer of a technological platform of the portal tundish car;
step 1.5, equipment approach acceptance: the tundish car track is generally made of QU100 type heavy steel rails, each length is 12m, the whole tundish car track is extremely long, according to the transportation length capacity of the car, a manufacturer should transport the track to an installation site in sections, a welding groove is manufactured at the joint of each section, a mark number is manufactured at the joint of each section, the track is measured to be flat and free of distortion, the visual surface is free of corrosion, a CGWK model is adopted for a track pressing plate, and the supply quantity is 5% more than the design quantity;
according to the data of the track Liang Fuce, arranging a group of adjusting base plates at intervals of 2m in a track laying area of the tundish car, wherein the base plate combination is not more than 5, and the thin base plates are clamped between thick gaskets for use; adjusting the elevation of the base plate = design rail top elevation-QU 100 steel rail, wherein the measured elevation is preferably 0.3-0.5mm higher than the design elevation when the base plate is laid; the mark strokes are used for drawing the placement positions of the backing plates, so that the track is prevented from moving when laid; the observation datum point uses a permanent datum point on the concrete foundation of the ladle turret to calculate elevation; the semi-portal tundish car is characterized in that the inner arc side rail and the outer arc side rail of the semi-portal tundish car have great height difference, an auxiliary datum point is arranged on the inner arc side rail beam, and a precise level gauge is erected on the ladle revolving body during elevation observation;
step 3, preliminary paving of the segmented track:
hoisting the inter-vehicle crane into position by using the inter-vehicle crane, and respectively laying an outer arc side inter-vehicle rail and an inner arc side inter-vehicle rail according to mark numbers;
the placement position of the rail positioning stop block extends along the running direction of the rail, and is within the range of 86-88 mm from the two sides of the central line of the rail, and the casting flow direction positioning stop block is arranged at the interfaces of the track sections of the tundish car, and is 200mm away from each interface; welding two ends of the track positioning stop block and welding the outer section in the length direction;
step 5, track center line initial adjustment:
step 5.1, two auxiliary lines are led out from a tangent line or a casting arc line, the positions of auxiliary line targets are arranged at two ends of the length direction of the track beam of the tundish car and serve as auxiliary observation points of a temporary central line, and the arrangement positions of the auxiliary observation points are convenient for adjusting the central line of the track;
step 5.2, center line adjustment: the method comprises the steps of respectively hanging auxiliary central line steel wires on two track beams, adjusting a central line special line drop by matching with equipment, measuring the minimum distance from the widest point of the side surface of a track surface to a line drop fish line by using a steel plate ruler, obtaining a theoretical value by calculation, and comparing the theoretical value with an actual value to obtain data to be adjusted; step 5.3, after data are obtained through measurement, the rail positioning stop block is matched with the inclined wedge, the inclined wedge is hit by an eight-pound hand hammer, two sides of the rail are matched and adjusted, and measurement is carried out simultaneously, so that the tundish car rail is finally moved to a correct position, the requirement of a longitudinal center line installation standard for allowing an error to be 2.0mm, the rail gauge is 0 to +2.0mm, and initial adjustment of the center line of the rail is completed; the insertion direction of the inclined wedge is noted, and the side without inclination is always close to the rail positioning stop block;
step 6.1, welding preparation: before the track joint is welded, carefully cleaning the groove and oil, rust and dirt nearby until the metallic luster is exposed, and matching the welding material with an alkaline welding rod according to the equal strength principle;
step 6.2 welding: the sequence of welding the rail joints is from bottom to top, the rail bottom, the rail waist and the rail head are firstly laid layer by layer, the build-up welding is carried out layer by layer, the periphery is repaired, the preheating is carried out at the same time according to the range of the rail end heads of 40mm, and the preheating and the interlayer temperature are controlled at 300-350 ℃; in the whole welding process, the deformation condition of the rail joint is checked by using a straight steel plate ruler at any time; the height position of the joint is adjusted at any time to control the deformation of the rail joint;
step 6.3, when each layer of welding wave is welded, particularly when each layer of welding wave is welded at the bottom of a rail, one welding strip is used for welding, arc breakage caused by welding rods is avoided in the middle, the welding directions of the front and rear layers of welding waves are opposite, and the welding work of each rail joint is continuously carried out, so that the rail end is welded at a higher temperature, and the temperature range is 300-350 ℃;
step 6.4, after welding, stress relief heat treatment is carried out, wherein the temperature of the stress relief heat treatment is 620-650 ℃, and the two sides of the welding line are 40mm from the center of the welding line as the stress relief heat treatment range; after the temperature of stress relief heat treatment reaches, constant temperature heating is required to be ensured to be over 20-30 min, and the electric welding fireproof blanket is used for heat preservation, so that heat preservation and slow cooling are carried out until the temperature reaches the normal temperature;
step 6.5, after the steel rail welded joint is subjected to stress relief heat treatment and cooled to the atmospheric temperature, carrying out grinding treatment on welding seams of the top surface and the two side surfaces of the rail; when the welding bulge is oversized, polishing by using a grinding wheel polisher until the welding bulge is flush with the rail surface, and polishing the surface;
before arranging the track pressing plate base, firstly assembling the track pressing plate base and the T-shaped bolts of the accessories, wherein when the installation distance is not required by a drawing, the distance between each group of the track pressing plate base and the bottom surface of the track is 500mm according to the specification, a gap of 1-2mm is reserved between the track pressing plate base and the bottom surface of the track for fine adjustment of the central line of the track, the material of the track pressing plate base is generally Q345, E5015 type welding rods and three-side 6mm fillet welds are adopted, and the influence on the disturbance change of the track beam when the track pressing plate base is welded during construction is considered;
8.1, marking an observation point on the upper surface of the rail at intervals of 2m, wherein an adjusting base plate is arranged below the rail of the observation point, measuring to obtain data, and fastening a rail pressing plate at the observation point when the data meet the installation requirement;
wherein, put into the wedge-shaped adjusting plate, and make the grooved face up; a steel rail pressing plate, a gasket, a spring gasket and a nut are sequentially installed; the wedge-shaped adjusting plate is driven, the position of the rail pressing device in the direction perpendicular to the steel rail is adjusted, after the steel rail pressing plate and the steel rail lower flange are tightly pressed, the nut is screwed down again, the T-shaped bolt is of the level 8.8, and the screwing down moment is 50% of the final screwing down moment 220N.M;
step 8.2, measuring to obtain data, and when the data does not meet the installation requirement:
1) The inclined wedges are positioned in the striking and loosening step 5, so that the track is in a free state, the track is slowly lifted by using a track jack, the lifting height meets the requirement of increasing and decreasing the space for adjusting the gasket, and the track is slowly fallen after the backing plate is adjusted;
2) Repeating the step 5, repeating the step 9.1, and repeating the adjustment measurement until the data meet the installation requirement, and fastening the track pressing plate;
step 9, fine adjustment of the track elevation;
a group of adjusting base plates are plugged under the track base plate at each group of track pressing plates, the track pressing plates are fastened, and the screwing torque is 110N.m; marking an observation point every 1m, wherein the elevation of the track is preferably positive, the elevation difference of the adjacent observation points is not more than 0.5mm, and the height difference of the two tracks is controlled to be 1.0mm;
step 10, track levelness adjustment;
the standard requires that the track levelness is 1mm/m, the iron level is used, the precision is 0.5mm/m, an observation point is marked every 1m, when the data does not meet the installation requirement, the construction method of 9.2 is repeated, the longitudinal levelness should comprehensively consider the adjustment quantity of two adjacent groups of backing plates, the transverse standard has no requirement, but the track is also checked whether to incline or not, and when the track is seriously inclined, the wheels are contacted with the track line, the track biting phenomenon occurs, and the normal operation of the tundish car is influenced; when iron level observation is recommended and the levelness is not satisfied by 1mm/m, the thin backing plate in the backing plate is adjusted to be used for half cutting, so that the inclination is adjusted;
step 11, fine tuning the track center line;
the measuring and adjusting method is carried out according to the step 5, and the change of the track elevation and the levelness is considered when the central line is finely adjusted;
step 12, fastening a track pressing plate;
the final tightening of the rail pressing plates is carried out after the steps 9, 10 and 11 are completed, the two sides of the rail are simultaneously fastened in groups during the tightening, and the tightening moment is the final tightening moment 220N.m;
step 13, checking and accepting the track;
step 14, rail installation ending;
removing the mounting auxiliary line and the bracket; removing safety protection measures affecting other procedures; anti-rust treatment is carried out on locking bolts of the inner arc side rail presser of the semi-portal tundish car;
step 15, grouting the rail;
grouting the outer arc side rail of the semi-portal tundish car; grouting two tracks of the door type tundish car; surrounding the track by using a steel plate according to the drawing requirement, welding the steel plate section on a process platform, and making the height of the steel plate equal to the surface of the concrete cast by the later process platform; the grouting height is not more than half of the track height, and C40 high-strength non-shrinkage grouting material is adopted; the grouting material proportion and the construction method are carried out according to the grouting material use instruction.
The method for measuring and installing the door type and semi-door type tundish car track comprises the following steps of 5.2 adjusting the central line: erecting a theodolite on an extension line of an auxiliary central line observation point, measuring distance data between the widest point of the side surface of the rail surface and an image included angle in a lens of the theodolite by using a theodolite observation steel plate ruler, and comparing a theoretical value with an actual value. The characteristics improve work efficiency.
According to the method for measuring and installing the door-shaped and semi-door-shaped tundish car track, the step 7 and the step 8 are constructed in parallel.
According to the measuring and installing method of the door type and semi-door type tundish car track, the step 12 and the track pressing plate are fastened, and the step 10 and the step 11 are matched for construction.
Compared with the traditional tundish car track installation adjustment, the installation method ensures the accuracy of the door type and semi-door type tundish car track installation, reduces the safety risk caused by installation, reduces the construction difficulty and effectively shortens the construction period.
Drawings
FIG. 1 is a flow chart of a door type and semi-door type tundish car track measurement and installation process proposed by the invention.
FIG. 2 is a schematic illustration of the position of a half door tundish car on a process platform according to the present invention.
FIG. 3 is a schematic illustration of the track elevation measurement of a half-gate tundish car of the present invention.
Fig. 4 is a schematic view of the longitudinal center line measurement of the track of the portal tundish car in the present invention.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in fig. 1 to 4, the method for measuring and installing the track of the portal type semi-portal type tundish car comprises the following steps:
step 1, preparing construction;
1.1 track installation and construction preparation comprises technical mating, track Liang Fuce, material and machine preparation and equipment approach acceptance.
1.2 technical mating: the technical bottom cards are compiled in advance, and professional technicians carry out written technical bottoms on all the constructors involved, including drivers driving the traveling vehicles.
1.3 track Liang Fuce: according to the relevant data of the installation result of the steel structure platform track beam of the previous process, using equipment to install a buried datum point (a permanent datum point on the concrete of the ladle turret 4), casting a central standard plate of a tangent line 6 (casting arc) by a continuous casting machine, measuring the elevation and the central line of the central position of the upper surface of the track beam, calculating to obtain data, comparing the data, and enabling the track beam to meet the track construction requirement of a tundish car.
1.4 materials and implement preparation mainly include:
1) The adjusting backing plate is made of stainless steel and has corrosion resistance, and the specifications are 200×150×0.3, 200×150×0.5, 200×150×1, 200×150×2 and 200×150×5, and the units are: mm; quantity: and according to the data of the track Liang Fuce, presetting processing by combining the number of the track pressing plate groups.
2) Two sets of auxiliary central line steel wires and accessories (special line drop for equipment adjustment, tensioner, line wheel and steel structure bracket); the steel wire phi 0.5mm is required.
3) Track positioning stops 150×25×25; slant wedge 150×25×20×10, number: 4 times of track number of the tundish car transported to the site in a segmented way, and the unit is as follows: mm.
4) The precision level gauge 3, the theodolite, two sets of arc welding equipment, two sets of oxygen and acetylene gas cutting tools and common tools for fitters.
5) The steel wire safety rope with the diameter of phi 8mm is hung on the arc side track beam in the semi-portal tundish car, and safety protection measures are needed at the opening of the vibrating frame of the crystallizer of the technological platform of the portal tundish car.
1.5 equipment approach acceptance: the tundish car track generally adopts a QU100 type heavy steel rail, and the length of each steel rail is 12m generally, because the whole tundish car tracks 1 and 2 are very long, according to the transportation length capacity of the vehicle, a manufacturer should transport the tracks to an installation site in a segmented manner, a welding groove is manufactured at the joint of each segment, and a mark number is manufactured at the joint of each segment. The track of each section was measured to be flat without distortion and the surface was visually inspected for rust. The track pressing plate is preferably of a CGWK type, and the supply quantity is preferably 5% more than the design quantity.
according to the data of the rails Liang Fuce, a group of adjusting base plates are arranged at intervals of 2m in the laying areas of the rails 1 and 2 of the tundish car, the base plate combination is not more than 5, and the thin base plates are clamped between the thick base plates for use. The adjusting pad elevation = design rail top elevation-QU 100 rail (height 150 mm), when adjusting pad laying, the measuring elevation is preferably 0.3-0.5mm higher than the design elevation. The placement position of the backing plate is marked by using the marking strokes, so that the tracks 1 and 2 are prevented from moving when laid. The observation reference point uses a permanent reference point on the concrete foundation of the ladle turret 4 to calculate the elevation. It should be noted that the inner arc side rail 2 and the outer arc side rail 1 of the semi-portal tundish car rail have great height difference, an auxiliary datum point is required to be arranged on the inner arc side rail beam, and the precise level gauge 3 is erected on the ladle revolving body 4 during elevation observation.
Step 3, preliminary paving of the segmented track;
the inter-vehicle crane is used for hoisting in-place tundish car tracks 1 and 2, and the outer arc side tundish car track 1 and the inner arc side tundish car track 2 are respectively laid according to mark numbers.
the placing position of the rail positioning stop block extends along the running direction of the rail, the distance between the placing position and the two sides of the center line of the rail is 86-88 mm (the width of the bottom surface of the QU100 is 150mm, and the gap between the positioning stop block and the edge distance of the bottom surface of the rail is reserved by 11-13 mm), and the casting flow direction positioning stop block is arranged at the section interface of the rail of the tundish car and is 200mm away from each interface. Welding two ends of the track positioning stop block and welding the outer sections in the length direction.
Step 5, initially adjusting the central line of the track;
5.1, 2 auxiliary lines 7 and 8 are led out from a tangent line (casting arc line), the positions of auxiliary line targets are arranged at two ends of the length direction of the track beam of the tundish car and serve as temporary central line auxiliary observation points, and the arrangement positions of the auxiliary observation points are convenient for adjusting the central line of the track.
5.2 centerline adjustment 2 methods can be used, the first: and 2 rail beams are respectively hung with auxiliary central line steel wires, a special line drop for central line is adjusted by matching with equipment, the minimum distance from the widest point of the side surface of the rail to the line drop fish line (the widest dimension of the rail is 108 mm) is measured by using a steel plate ruler, and a theoretical value is obtained through calculation. And comparing the theoretical value with the actual value to obtain the data to be adjusted. The characteristics are that the manpower is saved.
5.3 second: erecting a theodolite on an extension line of an auxiliary central line observation point, measuring distance data between the widest point of the side surface of the rail surface and an image included angle in a lens of the theodolite by using a theodolite observation steel plate ruler, and comparing a theoretical value with an actual value. The characteristics improve work efficiency.
5.4, after the data are obtained through measurement, the rail positioning stop block is matched with the inclined wedge, the eight-pound hand hammer is used for beating the inclined wedge, two sides of the rail are matched and adjusted, the measurement is carried out while the adjustment is carried out, finally, the tundish car rail is moved to the correct position, the requirement of the longitudinal center line installation standard is 2.0mm in tolerance, the rail gauge is 0 to +2.0mm, and the initial adjustment of the center line of the rail is completed. Note the direction of insertion of the wedges, always the non-sloped side is near the rail positioning stop.
6.1 preparation for welding: before the track joint is welded, carefully cleaning the groove and nearby oil, rust and other dirt until the metallic luster is exposed, and matching the welding material with an alkaline welding rod according to the equal strength principle;
6.2 welding: the sequence of welding the rail joints is from bottom to top, the rail bottom, the rail web and the rail head are firstly laid layer by layer, the build-up welding is carried out layer by layer, the periphery is repaired, the preheating is carried out according to the range of the rail end head of 40mm, and the preheating and the interlayer temperature are controlled at 300-350 ℃. During the whole welding process, the deformation condition of the rail joint must be checked at any time by using a straight steel plate ruler. The height position of the joint is adjusted at any time to control the deformation of the rail joint.
6.3, when each layer of welding wave is welded, especially when each layer of welding wave at the bottom of a welded rail is welded, one welding strip is used for welding, the arc breakage caused by welding rods is avoided in the middle, the welding directions of the front and rear 2 layers of welding waves are opposite, and the welding operation of each rail joint is continuously carried out, so that the rail end is welded at a higher temperature (300-350 ℃).
6.4, after welding, carrying out stress relief heat treatment, wherein the temperature of the stress relief heat treatment is 620-650 ℃, and the two sides of the welding line are 40mm from the center of the welding line as the stress relief heat treatment range; after the temperature of stress relief heat treatment reaches, constant temperature heating is required to be ensured to be over 20-30 min, and the electric welding fireproof blanket is used for heat preservation cotton to be wrapped, heat preservation and slow cooling are carried out until the normal temperature is reached.
6.5 after the welded joint of the rail is subjected to stress relief heat treatment and cooled to atmospheric temperature, the welding seams of the top surface and the two side surfaces of the rail are subjected to grinding treatment. When the welding bulge is oversized, the grinding treatment is carried out by a grinding wheel grinder until the welding bulge is flush with the rail surface, and finally the surface is polished.
before arranging the track clamp plate base, the track clamp plate base and the accessory T-shaped bolt are assembled together, when the installation distance drawing does not have the requirement, the interval distance of each group is 500mm according to the specification, a gap of 1-2mm is reserved between the track clamp plate base and the track bottom surface for fine adjustment of the track center line, the track clamp plate base is generally Q345, an E5015 type welding rod is adopted, three-side 6mm fillet welds are adopted, and the influence on the change of the disturbance degree of the track beam when the track clamp plate base is welded is considered during construction.
8.1, an adjusting base plate is needed under the condition that the track 1 and the track 2 are marked with an observation point every 2m, the indium steel ruler 5 is measured to obtain data, and when the data meet the installation requirement, the track pressing plate at the observation point is fastened.
Note that: placing a wedge-shaped adjusting plate and enabling the grooved surface to face upwards; a steel rail pressing plate, a gasket, a spring gasket and a nut are sequentially installed; and (3) driving a wedge-shaped adjusting plate, adjusting the position of the rail pressing device in the direction perpendicular to the steel rail, and tightening nuts after the steel rail pressing plate is tightly pressed with the lower flange of the steel rail, wherein the T-shaped bolt is of the level 8.8, and the tightening torque is 50% of the final tightening torque 220N.M.
8.2, measuring to obtain data, and when the data does not meet the installation requirement:
1) And (5) positioning the inclined wedges in the striking and loosening step, so that the track is in a free state, slowly lifting the track by using a track jack, and increasing and decreasing the lifting height to adjust the gaskets. The backing plate is regulated and then slowly falls down the track.
2) And 5, repeating the step 9.1, and repeating the adjustment measurement until the data meet the installation requirement, and fastening the track pressing plate.
Step 9, fine adjustment of the track elevation;
and a group of adjusting base plates are plugged under the track base plates at the positions of each group of track pressing plates, the track pressing plates are fastened, and the screwing torque is 110N.m. Every 1m marks an observation point, the indium steel ruler 5 is vertically erected on the observation point, the track elevation is preferably positive, the elevation difference of the adjacent observation points is not more than 0.5mm, and meanwhile, the height difference of the two tracks is ensured to be controlled to be 1.0mm.
Step 10, track levelness adjustment;
the standard requires that the levelness of the rails 1 and 2 is 1mm/m, the iron level is used, the precision is 0.5mm/m, an observation point is marked every 1m, when the data does not meet the installation requirement, the construction method of 9.2 is repeated, the longitudinal levelness is required to comprehensively consider the adjustment quantity of two adjacent groups of backing plates, the transverse standard is not required, however, whether the rails 1 and 2 incline or not is also required to be checked, and when the rails seriously incline, the wheels are contacted with the rails 1 and 2 in a line manner, so that the rail biting phenomenon occurs, and the normal operation of a tundish car is influenced. It is recommended to use iron level observation, and when the levelness is not 1mm/m, the thin backing plate in the adjusting backing plate is used for cutting half, so as to adjust the inclination.
Step 11, fine tuning the track center line;
the measuring and adjusting method is carried out according to the step 5, and the change of the elevation and the levelness of the tracks 1 and 2 is considered when the central line is finely adjusted.
Step 12, fastening a track pressing plate;
the final tightening of the rail pressing plates is carried out after the steps 9, 10 and 11 are completed, the two sides of the rail are noted during tightening, the rails are fastened in groups at the same time, and the tightening moment is the final tightening moment 220N.m.
Step 13, checking and accepting the track;
before the rails 1 and 2 are checked and accepted, self-checking is firstly carried out, after the self-checking is qualified, a supervision unit and related parties are notified, a self-checking report is submitted, the on-site checking and accepting comprises center line, elevation and levelness data checking, interface welding quality checking, rail presser bottom plate welding and locking bolt fastening condition checking.
Step 14, rail installation ending;
removing the mounting auxiliary line and the bracket; removing safety protection measures affecting other procedures; and (3) rust-proof treatment of the locking bolt of the track presser of the inner arc side track 2 of the semi-door type tundish car.
Step 15, grouting the rail;
and grouting the outer arc side track 2 of the semi-portal tundish car. Both rails 1, 2 of the door-type tundish car are grouted. And (3) surrounding the track by using a steel plate according to the requirement of a drawing, wherein the steel plate section is welded on a process platform, and the height of the steel plate is equal to the surface of the cast concrete of the later process platform. The grouting height is not more than half of the track height, and C40 high-strength non-shrinkage grouting material is adopted. The grouting material proportion and the construction method are carried out according to the grouting material use instruction.
Claims (4)
1. A measuring and installing method of a door type and semi-door type tundish car track is characterized by comprising the following steps: comprising
Step 1, preparing construction;
step 1.1, track installation and construction preparation comprises technical mating, track Liang Fuce, material and machine tool preparation and equipment entrance acceptance;
step 1.2, technical mating: a separate technical bottom card is compiled in advance, and professional technicians carry out written technical bottoms on all the constructors involved, including drivers driving the traveling vehicles;
step 1.3, track Liang Fuce: according to the relevant data of the installation result of the steel structure platform track beam of the process of the previous working procedure, using equipment to install a buried datum point, namely a permanent datum point on the concrete of the ladle turret, casting a tangent line by a continuous casting machine, namely a central standard plate of a casting arc, measuring the elevation and the central line of the central position of the upper surface of the track beam, calculating to obtain data, comparing the data, and enabling the track beam to meet the track construction requirement of a tundish car to perform working procedure handover;
the preparation of the materials and the tools in the step 1.4 mainly comprises the following steps:
1) The adjusting backing plate is made of stainless steel and is corrosion-resistant, and the specifications are 200×150×0.3, 200×150×0.5, 200×150×1, 200×150×2 and 200×150×5, and the units are: mm; quantity: according to the data of the track Liang Fuce, presetting processing by combining the number of the track pressing plate groups;
2) Two sets of auxiliary central line steel wires and accessories, including special line weight for equipment adjustment, tensioner, line wheel and steel structure bracket; requiring the steel wire phi to be 0.5mm;
3) Track positioning stops 150×25×25; slant wedge 150×25×20×10, number: 4 times of track number of the tundish car transported to the site in a segmented way, and the unit is as follows: mm;
4) Two sets of precision level, theodolite and arc welding equipment and two sets of oxygen and acetylene gas cutting tools;
5) A steel wire safety rope with the diameter of phi 8mm is hung on an arc side track beam in the semi-portal tundish car, and safety protection measures are needed at the opening of a vibrating frame of a crystallizer of a technological platform of the portal tundish car;
step 1.5, equipment approach acceptance: the tundish car track adopts a QU100 type heavy steel rail, each length is 12m, because the whole tundish car track is extremely long, according to the transportation length capacity of the car, a manufacturing factory transports the track to an installation site in a segmented way, a welding groove is manufactured at the joint of each section, a mark number is manufactured at the joint of each section, each section of track is measured to be flat and free of distortion, the visual surface is free of rust, a CGWK type track pressing plate is adopted, and the supply quantity is 5% more than the design quantity;
step 2, setting an adjusting base plate:
according to the data of the track Liang Fuce, arranging a group of adjusting base plates at intervals of 2m in a track laying area of the tundish car, wherein the base plate combination is not more than 5, and the thin base plates are clamped between thick gaskets for use; adjusting the elevation of the base plate = design rail top elevation-QU 100 steel rail height, and when the base plate is laid, measuring elevation is 0.3-0.5mm higher than design elevation; the mark strokes are used for drawing the placement positions of the backing plates, so that the track is prevented from moving when laid; the observation datum point uses a permanent datum point on the concrete foundation of the ladle turret to calculate elevation; the semi-portal tundish car is characterized in that the inner arc side rail and the outer arc side rail of the semi-portal tundish car have great height difference, an auxiliary datum point is arranged on the inner arc side rail beam, and a precise level gauge is erected on the ladle revolving body during elevation observation;
step 3, preliminary paving of the segmented track:
hoisting the inter-vehicle crane into position by using the inter-vehicle crane, and respectively laying an outer arc side inter-vehicle rail and an inner arc side inter-vehicle rail according to mark numbers;
step 4, welding a track positioning stop block:
the placement position of the rail positioning stop block extends along the running direction of the rail, and is within the range of 86-88 mm from the two sides of the central line of the rail, and the casting flow direction positioning stop block is arranged at the interfaces of the track sections of the tundish car, and is 200mm away from each interface; welding two ends of the track positioning stop block and welding the outer section in the length direction;
step 5, track center line initial adjustment:
step 5.1, two auxiliary lines are led out from a tangent line or a casting arc line, the positions of auxiliary line targets are arranged at two ends of the length direction of the track beam of the tundish car and serve as auxiliary observation points of a temporary central line, and the arrangement positions of the auxiliary observation points are convenient for adjusting the central line of the track;
step 5.2, center line adjustment: the method comprises the steps of respectively hanging auxiliary central line steel wires on two track beams, adjusting a central line special line drop by matching with equipment, measuring the minimum distance from the widest point of the side surface of a track surface to a line drop fish line by using a steel plate ruler, obtaining a theoretical value by calculation, and comparing the theoretical value with an actual value to obtain data to be adjusted; step 5.3, after data are obtained through measurement, the rail positioning stop block is matched with the inclined wedge, the inclined wedge is hit by an eight-pound hand hammer, two sides of the rail are matched and adjusted, and measurement is carried out simultaneously, so that the tundish car rail is finally moved to a correct position, the requirement of a longitudinal center line installation standard for allowing an error to be 2.0mm, the rail gauge is 0 to +2.0mm, and initial adjustment of the center line of the rail is completed; the insertion direction of the inclined wedge is noted, and the side without inclination is always close to the rail positioning stop block;
step 6, welding the segmented track:
step 6.1, welding preparation: before the track joint is welded, carefully cleaning the groove and oil, rust and dirt nearby until the metallic luster is exposed, and matching the welding material with an alkaline welding rod according to the equal strength principle;
step 6.2 welding: the sequence of welding the rail joints is from bottom to top, the rail bottom, the rail waist and the rail head are firstly laid layer by layer, the build-up welding is carried out layer by layer, the periphery is repaired, the preheating is carried out at the same time according to the range of the rail end heads of 40mm, and the preheating and the interlayer temperature are controlled at 300-350 ℃; in the whole welding process, the deformation condition of the rail joint is checked by using a straight steel plate ruler at any time; the height position of the joint is adjusted at any time to control the deformation of the rail joint;
step 6.3, when each layer of welding wave is welded, one welding strip is used for welding each layer of welding wave at the bottom of a welding rail, the arc breakage caused by welding a welding rod is avoided in the middle, the welding directions of the front and rear layers of welding waves are opposite, and the welding work of each track joint is continuously carried out, so that the rail end is welded at a higher temperature, and the temperature range is 300-350 ℃;
step 6.4, after welding, stress relief heat treatment is carried out, wherein the temperature of the stress relief heat treatment is 620-650 ℃, and the two sides of the welding line are 40mm from the center of the welding line as the stress relief heat treatment range; after the temperature of stress relief heat treatment reaches, constant temperature heating is required to be ensured to be over 20-30 min, and the electric welding fireproof blanket is used for heat preservation, so that heat preservation and slow cooling are carried out until the temperature reaches the normal temperature;
step 6.5, after the steel rail welded joint is subjected to stress relief heat treatment and cooled to the atmospheric temperature, carrying out grinding treatment on welding seams of the top surface and the two side surfaces of the rail; when the welding bulge is oversized, polishing by using a grinding wheel polisher until the welding bulge is flush with the rail surface, and polishing the surface;
step 7, welding a track pressing plate base:
before arranging the track pressing plate base, firstly assembling the track pressing plate base and the T-shaped bolts of the accessories, wherein when the installation distance is not required by a drawing, the distance between each group of the track pressing plate base and the bottom surface of the track is 500mm according to the specification, a gap of 1-2mm is reserved between the track pressing plate base and the bottom surface of the track for fine adjustment of the central line of the track, the material of the track pressing plate base is Q345, E5015 type welding rods and three-side 6mm fillet welds are adopted, and the influence on the disturbance change of the track beam when the track pressing plate base is welded during construction is considered;
step 8, the elevation of the track is initially adjusted,
8.1, marking an observation point on the upper surface of the rail at intervals of 2m, wherein an adjusting base plate is arranged below the rail of the observation point, measuring to obtain data, and fastening a rail pressing plate at the observation point when the data meet the installation requirement;
wherein, put into the wedge-shaped adjusting plate, and make the grooved face up; a steel rail pressing plate, a gasket, a spring gasket and a nut are sequentially installed; the wedge-shaped adjusting plate is driven, the position of the rail pressing device in the direction perpendicular to the steel rail is adjusted, after the steel rail pressing plate and the steel rail lower flange are tightly pressed, the nut is screwed down again, the T-shaped bolt is of the level 8.8, and the screwing down moment is 50% of the final screwing down moment 220N.m;
step 8.2, measuring to obtain data, and when the data does not meet the installation requirement:
1) The inclined wedges are positioned in the striking and loosening step 5, so that the track is in a free state, the track is slowly lifted by using a track jack, the lifting height meets the requirement of increasing and decreasing the space for adjusting the gasket, and the track is slowly fallen after the backing plate is adjusted;
2) Repeating the step 5, repeating the step 9.1, and repeating the adjustment measurement until the data meet the installation requirement, and fastening the track pressing plate;
step 9, fine adjustment of the track elevation;
a group of adjusting base plates are plugged under the track base plate at each group of track pressing plates, the track pressing plates are fastened, and the screwing torque is 110N.m; marking an observation point every 1m, wherein the elevation of the track is positive, the elevation difference of the adjacent observation points is not more than 0.5mm, and the height difference of the two tracks is controlled to be 1.0mm;
step 10, track levelness adjustment;
the standard requires that the track levelness is 1mm/m, a molten iron leveling ruler is used, the accuracy is 0.5mm/m, an observation point is marked every 1m, when the data does not meet the installation requirement, the construction method of 9.2 is repeated, the longitudinal levelness should comprehensively consider the adjustment quantity of two adjacent groups of backing plates, the transverse standard has no requirement, but the track is also checked whether to incline or not, and when the track is seriously inclined, the wheels are contacted with the track line, the track biting phenomenon occurs, and the normal operation of the tundish car is influenced; when the iron level observation ruler is used and the levelness is not 1mm/m, the thin backing plate in the backing plate is adjusted to be used by cutting half, so that the inclination is adjusted;
step 11, fine tuning the track center line;
the measuring and adjusting method is carried out according to the step 5, and the change of the track elevation and the levelness is considered when the central line is finely adjusted;
step 12, fastening a track pressing plate;
the final tightening of the rail pressing plates is carried out after the steps 9, 10 and 11 are completed, the two sides of the rail are simultaneously fastened in groups during the tightening, and the tightening moment is the final tightening moment 220N.m;
step 13, checking and accepting the track;
step 14, rail installation ending;
removing the mounting auxiliary line and the bracket; removing safety protection measures affecting other procedures; anti-rust treatment is carried out on locking bolts of the inner arc side rail presser of the semi-portal tundish car;
step 15, grouting the rail;
grouting the outer arc side rail of the semi-portal tundish car; grouting two tracks of the door type tundish car; surrounding the track by using a steel plate according to the drawing requirement, welding the steel plate section on a process platform, and making the height of the steel plate equal to the surface of the concrete cast by the later process platform; the grouting height is not more than half of the track height, and C40 high-strength non-shrinkage grouting material is adopted; the grouting material proportion and the construction method are carried out according to the grouting material use instruction.
2. The method for measuring and installing the door-type and semi-door-type tundish car track according to claim 1, which is characterized in that: step 5.2, central line adjustment: erecting a theodolite on an extension line of an auxiliary central line observation point, measuring distance data between the widest point of the side surface of the rail surface and an image included angle in a lens of the theodolite by using a theodolite observation steel plate ruler, and comparing a theoretical value with an actual value.
3. The method for measuring and installing the door-type and semi-door-type tundish car track according to claim 1, which is characterized in that: and 7, constructing in parallel with the step 8.
4. The method for measuring and installing the door-type and semi-door-type tundish car track according to claim 1, which is characterized in that: and step 12, fastening the track pressing plate, and constructing in cooperation with the step 10 and the step 11.
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| CN202482717U (en) * | 2012-03-15 | 2012-10-10 | 中国十七冶集团有限公司 | Mounting device for buggy ladle track |
| CN102615277A (en) * | 2012-03-15 | 2012-08-01 | 中国十七冶集团有限公司 | Construction method for mounting rails of buggy ladle |
| AT513067B1 (en) * | 2012-06-27 | 2017-03-15 | Primetals Technologies Austria GmbH | Distribution trolley with casting distributor for a continuous casting machine |
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