Rapid replacement device for narrow-side water tank of slab continuous casting machine crystallizer

Abstract

The invention discloses a slab continuous casting machine crystallizer narrow-edge water tank rapid replacing device which comprises a connecting width adjusting device and a guide rod of a narrow-edge water tank, an original guide rod pin hole connecting structure is changed into a double-hook connecting structure, the lifting height of the narrow-edge water tank is 50 mmn, and the position, 45 mm below the top of a guide rod hook, of the narrow-edge water tank is fixedly connected with the guide rod. A 45-degree angle is cut off in the vertical line direction and the horizontal line direction, after the notch and a connecting shaft on the narrow-edge water tank are installed in place, the notch is flush with the upper portions of the hooks, and positioning baffles are installed on the two sides of the double hooks and the guide rods on the upper portions of the double hooks in a pre-tightening mode through bolts. After the installation mode of the narrow-edge water tank is improved, operation is easy and convenient, the maintenance speed is high, the number of maintenance personnel is reduced from five to three, the maintenance time is shortened from 68 hours to 4 hours, the labor intensity of workers is reduced to a great extent, and the maintenance time is shortened.

Description

Technical Field

[0001] The invention relates to a device for quickly replacing a narrow side water tank of a crystallizer of a slab continuous casting machine. Background Art

[0002] The crystallizer used in the slab continuous casting machine is a combined structure with an online thermal width adjustment function, and the crystallizer cooling water can be automatically connected. The crystallizer consists of two wide copper plates fixed on a welded cooling frame, and two narrow copper plates fixed on the side cooling water tank. The assembled wide copper plates are fixed to the crystallizer frame of the welded structure with bolts. One of the two copper plate boxes is on the outer arc side. The outer arc side frame is adjusted to the exact position of the outer arc with a screw and then fixed. The inner arc side copper plate box uses a clamping and loosening device composed of 4 hydraulic cylinders and disc springs to adjust the tightness of the copper plate box. When clamping the narrow copper plate, use the force of the disc spring to clamp it tightly. When loosening, oil is fed into the rod side of the oil cylinder to loosen the wide copper plate. At this time, the width can be adjusted.

[0003] The width adjustment device consists of a telescopic device composed of a motor, a reducer, a universal coupling, a screw and a sleeve, and a narrow copper plate box. When the width needs to be adjusted, the screw moves forward and backward through the matching sleeve. The narrow foot roller is fixed to the narrow copper plate through disc springs and bolts. When the dummy rod enters the foot roller and deviates, the foot roller is squeezed, so that the disc spring makes the foot roller give way to a certain extent, allowing the dummy rod to enter the crystallizer smoothly. The wide foot roller consists of two pairs of three-section rollers fixed on the foot roller support frame. The wide copper plate is fixed to the copper plate cooling box of the welded structure by many evenly distributed bolts. The narrow copper plate is fixed to the frame by bolts to form a narrow copper plate box. The cooling of the narrow copper plate is connected to the water inlet of the narrow copper plate box through a telescopic bellows, and the water inlet pipe can be telescoped when the width is adjusted. The main problems are as follows: In actual production and use, the copper plates of the narrow side water tank and the wide side water tank of the crystallizer have different steel throughput (70,000 tons for the narrow side and 120,000 tons for the wide side). Therefore, as long as the steel throughput of the copper plates of the narrow side water tank expires, they must be replaced. From the current installation method of the narrow side water tank, to replace the copper plates of the narrow side water tank, the inner and outer arc wide side water tanks must be completely dismantled, and then the pins of the narrow side water tank must be removed before the narrow side water tank can be lifted out for repair and replacement. This maintenance method takes a long time and has high costs (5 people × 7 days to repair a crystallizer), which greatly increases the maintenance time and cost, and the maintenance speed is slow, which cannot meet production needs.

[0004] Patent Search: Utility Model Patent "A Narrow Side Assembly Device for Slab Mold" CN202222578832.4. The present utility model relates to the field of metallurgical continuous casting equipment and discloses a narrow side assembly device for slab mold, including a common support plate, a narrow side water tank, a narrow side copper plate, a gripping block, a split bearing seat, etc. The common support plate is in the shape of a "work" character, with a supporting male rabbet at the bottom and a cross keyway at the top. The narrow side water tank is internally provided with water channels, with water cavities at the top and bottom of the joint surface with the copper plate, sealing ring grooves around the perimeter, and external inlet and return water pipelines at the top. The gripping block is fastened to the common support plate by bolts, with a cross key at the bottom for precise cooperation with the common support plate and support shafts on both sides. The split bearing seat consists of two upper and lower parts. In the present utility model, by adding this device to the slab continuous casting machine mold, it is possible to simultaneously produce two-strand or multi-strand continuous casting billets on a single-strand continuous casting machine equipment. Moreover, the number of parts of this device is small, and disassembly and assembly are convenient, enabling the rapid realization of the production requirements of multi-specification continuous casting billets on one continuous casting machine. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid replacement device for the narrow side water tank of a slab continuous casting machine mold, which can greatly shorten the maintenance time and prevent production accidents.

[0006] The technical solution adopted by the present invention is a rapid replacement device for the narrow side water tank of a slab continuous casting machine mold, including a connection width adjustment device and a guide rod for the narrow side water tank. The original guide rod pin hole connection structure is changed to a double-hook connection structure. The lifting height for hoisting the narrow side water tank is 50 mm. At a position 45 mm below the top of the guide rod hook, a 45° angle is cut off along the vertical and horizontal directions, so that after the connecting shaft on the narrow side water tank is installed in place at the cut-off position, it is flush with the upper part of the hook. Positioning baffles are installed by bolt pre-tightening on both sides and the upper part of the double hook and the guide rod respectively.

[0007] When the steel passing amount of the narrow side copper plate of the mold reaches the cycle and needs to be replaced, the offline mold is hoisted to the maintenance platform. The wide side water tank is opened by the clamping cylinder, lifting the narrow side water tank by a height of 40 mm, so that the trunnion at the upper part of the water tank is higher than the hook position of the upper guide rod. Gently push the foot roller at the lower part of the water tank, and lift out the water tank and the copper plate together to replace and repair the copper plate. Then, perform local repairs on other components of the mold, and it can be put back into use again. After re-designing the connection mechanism of the narrow side copper plate of the mold, good results have been achieved: after the installation method of the narrow side water tank is improved, the operation is simple, the maintenance speed is fast, the number of maintenance personnel is reduced from 5 to 3, the maintenance time is reduced from 68 hours to 4 hours, greatly reducing the labor intensity of workers, shortening the maintenance time, avoiding safety accidents for workers during long-term maintenance work, ensuring the normal production of the continuous casting machine, and achieving the expected effect. Brief Description of the Drawings

[0008] Figure 1 It is a front view structural schematic diagram of the guide rod of the present invention; Figure 2 It is an installation structural schematic diagram of the present invention. Embodiment

[0009] A rapid replacement device for the narrow-side water tank of a slab caster mold, as Figure 1 , 2 shown, includes a connecting width adjustment device 5 and a guide rod 1 of the narrow-side water tank 6. The original guide rod pin hole connection structure is changed to a double-hook connection structure 2. The lifting height for hoisting the narrow-side water tank 6 is 50 mm. At a position 45 mm below the top of the guide rod hook, a 45° angle is cut off along the vertical and horizontal directions. After the connecting shaft on the narrow-side water tank is installed in place at the cut, it is flush with the upper part of the hook. Positioning baffles 3 are pre-tightened and installed on both sides and the upper part of the guide rod of the double-hook by bolts 4.

Claims

1. A rapid replacement device for the narrow-side water tank of a mold in a slab continuous casting machine, comprising a connecting width adjustment device and a guide rod for the narrow-side water tank, characterized in that: Change the original connecting structure of the guide rod pin holes to a double-hook connecting structure. The lifting height for hoisting the narrow-side water tank is 50 mm. At a position 45 mm below the top of the guide rod hook, cut off a 45° angle along the vertical and horizontal directions. After the connecting shaft on the narrow-side water tank is installed in place at the cut, it should be flush with the upper part of the hook. Install positioning baffles on both sides and the upper part of the guide rod of the double-hook with bolt pre-tightening.

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