A device for replacing furnace rollers of heating furnaces in cramped spaces

Abstract

The present invention discloses a device for replacing the rollers of a heating furnace in a cramped space, and relates to the field of equipment for replacing the rollers of a heating furnace in the metallurgical industry. The device mainly solves the problem of achieving safe and rapid replacement of the rollers of a heating furnace in a limited space with less manpower. The device comprises a roller hanging beam, a roller hanging frame, a transverse shifting device, a lifting device, a roller changing trolley, and a floor steel plate. The roller hanging frame is suspended on the roller hanging beam, the transverse shifting device is fixed on the roller hanging beam, the roller hanging frame and the transverse shifting device are connected by a lead screw nut, the roller hanging beam is detachably placed on the roller changing trolley and the lifting device, the lifting device is connected to the roller changing trolley by threads, and the roller changing trolley is placed on the floor steel plate. The present invention not only solves the problem of difficulty in replacing the rollers of a heating furnace in a cramped space, but also effectively saves human resources for roller changing operations.

Description

Technical Field

[0001] The invention relates to the field of furnace roller replacement equipment for heating furnaces in the metallurgical industry, and in particular to a furnace roller replacement device for a heating furnace in a cramped space. Background Art

[0002] The heating furnace is a very important steel heating equipment on the production line of a steel plant. Its main function is to transport and heat steel. In the heating furnace, a furnace roller needs to be installed at a certain distance along the direction of steel movement, and the steel billet is transported on the furnace roller. The furnace roller must rotate under high temperature heat load and steel billet load, and is easily mechanically damaged by collision, wear and other factors of the steel billet. During the production process, there will be some large and hard impurities in the heating furnace that adhere to the surface of the furnace roller and are difficult to fall off. Surface damage to the furnace roller and adhesion of impurities will cause scratches on the surface of the steel. With the continuous advancement of technology, downstream products have higher and higher requirements for the surface quality of steel. Therefore, the furnace roller of the heating furnace needs to be inspected or replaced from time to time according to the actual working conditions to ensure the surface quality of the furnace roller and ensure product quality.

[0003] The heating furnace is a closed structure, and the furnace rollers can only be pulled out from the openings on the side furnace wall. At present, the heating furnace rollers in steel plants are mostly replaced by C-type frame hangers or roller hanging tools with counterweights. Such tools have a large working range and are difficult to adapt to the roller replacement requirements in cramped spaces. At the same time, the cantilever roller replacement method is also difficult to ensure the safety of operators. The furnace roller replacement speed is slow, which takes up a lot of overhead crane time and cannot meet the fast-paced production requirements of today's steel plants. In some locations with relatively cramped environmental space, most of them currently rely on manually erected brackets and use manual hoists to change rollers. This method requires a lot of human resources and time. In addition, the ambient temperature around the heating furnace is high, and various pipelines are densely distributed on the outside of the furnace wall. The safety of operators is poor, and the disassembly and assembly of the furnace rollers is very inconvenient. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a heating furnace roller replacement device in a cramped space, which can realize safe and rapid replacement of the heating furnace roller in a limited space with less manpower.

[0005] The technical solution adopted by the present invention is: a device for replacing furnace rollers of a heating furnace in a cramped space, comprising a roller hanging beam 1, a roller hanging frame 2, a transverse device 3, a lifting device 4, a roller changing trolley 5, and a floor steel plate 6. The roller hanging frame 2 is suspended on the roller hanging beam 1, the transverse device 3 is fixedly arranged on the roller hanging beam 1, the roller hanging frame 2 and the transverse device 3 are connected by a screw nut, the roller hanging beam 1 is detachably placed on the roller changing trolley 5 and the lifting device 4, the lifting device 4 is connected to the roller changing trolley 5 by threads, and the roller changing trolley 5 is placed on the floor steel plate 6.

[0006] Furthermore, the roller hanging beam 1 comprises a beam 11, a support frame 12, a connecting frame 13, and a furnace roller hanging ring assembly 14. There are two supporting frames 12, which are symmetrically arranged on both sides of the beam, the connecting frame 13 is fixedly connected to the beam 11, and the furnace roller hanging ring assembly 14 is movably arranged at the front end of the beam 11.

[0007] Furthermore, the roller frame 2 includes a roller 21, two sets of hanging plates 22, a hanger 23, a pressure roller block 24, and a furnace roller rear hanging ring 25. The roller 21 is arranged inside the two hanging plates 22, the hanger 23 is arranged between the two hanging plates 22 and connected by threads, the pressure roller block 24 is connected to the hanger 23 by threads, and the furnace roller rear hanging ring 25 is connected to the hanger 23 by a movable pin.

[0008] Furthermore, the transverse movement device 3 includes a handle 31, a large gear 32, a fixed seat 33, a locking screw 34, a small gear 35, and a lead screw 36. The large gear 32 is movably connected to the fixed seat 33 at its center, the handle 31 and the locking screw 34 are provided on the end surface of the large gear 32, the large gear 32 is meshed with the small gear 35, and the small gear 35 is fixedly connected to the lead screw 36.

[0009] Furthermore, the lifting device 4 comprises a hand wheel 41, a hand wheel screw 42, and a lifting seat 43. The hand wheel 41 is fixed on the hand wheel screw 42, and the lifting seat 43 is movably arranged on the upper end surface of the hand wheel 41.

[0010] Furthermore, the roller changing trolley 5 comprises a body 51, a positioning fork 52, a pull rod 53, a support rod 54, and a wheel 55. The positioning fork 52 is movably connected to the body 51, the pull rod 53, the support rod 54 and the body 51 are all threadedly connected, and the wheel 55 is arranged on the bottom surface of the body 51.

[0011] Furthermore, the paving steel plate 6 is provided with positioning studs 61 and anti-tilt threaded holes.

[0012] Furthermore, the support frame 12 is a pin shaft with a fixed seat, which can rotate freely in the groove corresponding to the roller changing trolley 5.

[0013] Furthermore, the furnace roller hanging ring assembly 14 includes a crank 15, an eccentric shaft 16, and a furnace roller front hanging ring 17. The crank 15 is fixedly connected to the eccentric shaft 16, and the furnace roller front hanging ring 17 is arranged on the eccentric shaft 16.

[0014] Furthermore, the front wheel of the wheel 55 is a fixed wheel, and the rear wheel is a universal wheel with brakes.

[0015] The advantages of the present invention are that the overall structure of the device is compact, the purely manual operation mode does not require the configuration of redundant pipelines, and is adapted to the requirements for replacing the furnace rollers of the heating furnace in a cramped space. The separate structure of the hanger and the trolley facilitates the turnover and transportation of the furnace rollers. The operation process of the device is simple, reducing the number of operators and the work intensity requirements. The double hanging ring structure improves the operational safety during the transportation of the furnace rollers. The lifting device can control the cantilevered position of the furnace rollers during the roller replacement process, and can effectively prevent the furnace rollers from scratching the furnace wall or surrounding pipelines during the process of being pulled out or fed into the heating furnace, making the process of replacing the furnace rollers smoother and significantly improving the efficiency of furnace roller replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a furnace roller replacement device for a heating furnace in a cramped space provided by an embodiment of the present invention;

[0017] Figure 2 A cross-sectional view of a furnace roller hanging ring assembly of a furnace roller replacement device for a heating furnace in a cramped space provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the connection of a transverse movement device of a heating furnace roller replacement device in a cramped space provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the connection between a roller hanger frame and a lifting device of a heating furnace roller replacement device in a cramped space provided by an embodiment of the present invention.

[0020] Description of the drawings: 1-hanging roller beam, 11-beam, 12-support frame, 13-connecting frame, 14-furnace roller hanging ring assembly, 15-crank handle, 16-eccentric shaft, 17-furnace roller front hanging ring; 2-hanging roller frame, 21-roller, 22-hanging plate, 23-hanging frame, 24-pressure roller block, 25-furnace roller rear hanging ring; 3-transverse movement device, 31-handle, 32-large gear, 33-fixed seat, 34-locking screw, 35-small gear, 36-screw; 4-lifting device, 41-handwheel, 42-handwheel screw, 43-lifting seat; 5-roller changing trolley, 51-car body, 52-positioning fork, 53-pull rod, 54-support rod, 55-wheel; 6-floor steel plate, 61-positioning stud. DETAILED DESCRIPTION

[0021] In order to enable technicians in the technical field to which the present application belongs to understand the present application more clearly, the technical solution of the present application is described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0022] In order to solve the technical problems that the common furnace roller hangers in the prior art cannot meet the replacement requirements of the furnace rollers of the heating furnace in a cramped space, and there are poor operator safety and low roller replacement efficiency during the roller replacement process, the present invention provides a furnace roller replacement device for the heating furnace in a cramped space, which can realize the safe replacement of the furnace rollers of the heating furnace in a cramped space, save operating human resources, and improve the roller replacement efficiency. The content of the present invention is described in detail through embodiments below:

[0023] A device for replacing furnace rollers of a heating furnace in a cramped space comprises a roller hanging beam 1, a roller hanging frame 2, a transverse device 3, a lifting device 4, a roller changing trolley 5, and a floor steel plate 6. The roller hanging frame 2 is suspended on the roller hanging beam 1, the transverse device 3 is fixedly arranged on the roller hanging beam 1, the roller hanging frame 2 and the transverse device 3 are connected by a lead screw nut, the roller hanging beam 1 is detachably placed on the lifting device 4 and the roller changing trolley 5, the lifting device 4 is connected to the roller changing trolley 5 by threads, and the roller changing trolley 5 is placed on the floor steel plate 6.

[0024] The roller hanging beam 1 includes a beam 11, a support frame 12, a connecting frame 13, and a furnace roller hanging ring assembly 14. The beam 11 is a welded structure, and tracks are provided on both sides for the roller hanging frame 2 to move forward and backward. The support frame 12 is a pin shaft with a fixed seat. Two support frames 12 are symmetrically arranged on both sides of the beam 11. When adjusting the furnace roller posture, they can rotate freely in the groove corresponding to the car body 51 following the beam 11. The connecting frame 13 is fixedly connected to the beam 11, and the lower end is pin-connected to the lifting seat 43; the furnace roller hanging ring assembly 14 includes a crank 15, an eccentric shaft 16, and a furnace roller front hanging ring 17. The crank 15 and the eccentric shaft 16 are fixed together by screws. The furnace roller front hanging ring 17 is movably connected to the eccentric shaft 16. The eccentric shaft 16 is driven to rotate by the crank 15, and a certain adjustment margin can be provided when the furnace roller front hanging ring 17 is installed.

[0025] The roller frame 2 includes rollers 21, two groups of hanging plates 22, a hanger 23, a roller block 24, and a furnace roller rear hanging ring 25. Each group of hanging plates 22 has two left and right pieces, which are respectively arranged on both sides of the roller beam 2, and the roller 21 is arranged on the inner side of the two hanging plates 22. The hanger 23 is arranged between the two hanging plates 22 and connected by threads. The roller block 24 is threadedly connected to the hanger 23. The roller block 24 can move up and down relative to the hanger 23 to achieve a slight adjustment of the furnace roller position. The furnace roller rear hanging ring 25 is connected to the hanger 23 by a movable pin.

[0026] The transverse movement device 3 includes a handle 31, a large gear 32, a fixed seat 33, a locking screw 34, a small gear 35, and a lead screw 36. The fixed seat 33 is hinged and fixed to the beam 11, the center of the large gear 32 is movably connected to the fixed seat 33, the end face of the large gear 32 is provided with a handle 31 and a locking screw 34, the large gear 32 and the small gear 35 are meshed with each other, the small gear 35 is fixedly connected to the lead screw 36, the handle 31 can drive the large gear 35 to rotate, and the rotation of the lead screw 36 is driven by the small gear 36, so as to realize the forward and backward movement of the hanging roller frame 2; when the hanging roller frame 2 reaches the working position, the locking screw 34 is tightened to lock the entire transverse movement device 3.

[0027] The lifting device 4 includes a handwheel 41, a handwheel screw 42, and a lifting seat 43. The handwheel 41 is fixed on the handwheel screw 42, and the lifting seat 43 is movably arranged on the upper end surface of the handwheel 41. The lower end of the screw 42 is connected to the roller changing trolley 5 by a thread. When the furnace roller posture needs to be adjusted, the handwheel 41 is rotated to drive the handwheel screw 42 to rotate, so as to realize the vertical movement of the lifting seat 43; the lifting seat 43 transmits the vertical displacement to the upper roller hanging beam to realize the furnace roller posture adjustment.

[0028] The roller changing trolley 5 comprises a trolley body 51, a positioning fork 52, a pull rod 53, a support rod 54, and a wheel 55. The positioning fork 52 is movably connected to the trolley body 51, and cooperates with the positioning stud 61 on the paving steel plate 6 to realize the centering of the roller changing tool as a whole. The pull rod 53, the support rod 54 and the trolley body are all threadedly connected. When the roller changing trolley is working, the pull rod 53 is connected to the anti-tilt threaded hole on the paving steel plate 6, and the support rod 54 touches the ground and presses tightly, which jointly ensures the stability of the roller changing device during operation; the wheel 55 is arranged on the bottom surface of the trolley body 51, wherein the front wheel is a fixed wheel and the rear wheel is a universal wheel with a brake, which is used to adjust the overall posture of the roller changing trolley after the positioning fork 52 completes the centering of the trolley body.

[0029] Furthermore, the specific connection relationship between the various components is that the roller frame 2 is suspended on the roller beam 1, wherein the roller 21 is installed in the track formed by the beam 11; the transverse movement device 3 is fixedly arranged on the roller beam 1, wherein the fixed seat 33 is hingedly fixed to the tail end of the beam 11 by bolts; the roller frame 2 and the transverse movement device 3 are connected by a screw nut, wherein the screw 36 is threadedly connected to the threaded hole formed by the hanger 23; the roller beam 1 is detachably placed on the roller changing trolley 5 and the lifting device 4, wherein the front end of the roller beam 1 is placed in the groove corresponding to the car body 51 through the support frame 12, and the rear end of the roller beam 1 is pin-connected to the lifting seat 43 through the connecting frame 13; the handwheel screw 42 in the lifting device 4 is threadedly connected to the threaded hole corresponding to the car body 51; the paving steel plate 6 is provided with an anti-tipping threaded hole corresponding to the pull rod 53, and the positioning stud 61 is fixedly arranged on the paving steel plate 6 and connected to the positioning fork 52 when the roller changing tool is positioned.

[0030] The present invention does not specifically limit the number of support rods, and the number of support rods can be increased or decreased according to the weight of the furnace rollers to be replaced. In this embodiment, there are 4 support rods distributed on both sides of the roller changing trolley.

[0031] The present invention does not specifically limit the shape of the furnace roller hanging ring. As long as the hanging ring is closely fitted to the roller diameter, the shape of the furnace roller hanging ring can be changed according to actual conditions. The device can adapt to the replacement of furnace rollers of various sizes and specifications.

[0032] The specific implementation of the heating furnace roller replacement device provided by the present invention is as follows:

[0033] Preparation stage: Before using the device, lay the floor steel plate on the operating side of the heating furnace, and the positioning studs are aligned with the center lines of each furnace roller. Push the roller-changing trolley close to the furnace roller to be replaced, so that the positioning fork clamps the positioning studs to complete the positioning and centering of the device; continue to push the roller-changing trolley to rotate around the positioning studs until the tie rod is aligned with the anti-tilt threaded hole on the floor steel plate, tighten the tie rod, lock the universal wheel brake clamp, and lock the positioning studs with nuts at the same time. At this time, the position adjustment of the roller-changing trolley is completed; rotate each support rod until it touches the ground, and the roller-changing preparation stage is over.

[0034] Roller changing stage: remove the fixing bolts of the corresponding bearing seat of the furnace roller, rotate the handle, and move the roller frame horizontally to the vicinity of the furnace wall of the heating furnace; rotate the handwheel to lift the lifting device, the height of the tail end of the roller beam rises, and the height of the front end drops; the height of the roller frame continues to drop until the pressure roller block contacts the roller neck of the furnace roller and stops, and the rear hanging ring of the furnace roller is installed. At this time, the roller frame and the furnace roller form an integrated cantilever structure; rotate the handwheel in the opposite direction to lower the height of the lifting device, and the furnace roller is gradually lifted until the furnace roller is horizontal. Rotate the handle in the opposite direction and pull the furnace roller out of the heating furnace through the roller frame; when all the furnace rollers leave the heating furnace, tighten the locking screws, install the front hanging ring of the furnace roller, and adjust the gap between the hanging ring and the furnace roller by the crank handle until the front hanging ring of the furnace roller is completely in contact with the furnace roller. At this time, the weight of the furnace roller is borne entirely by the two furnace roller hanging rings, and the roller changing process is completed.

[0035] Transportation stage: remove the pin connecting the roller beam and the lifting device. At this time, the roller beam and the roller changing trolley are disassembled, and the lifting belt is fixed in the lifting hole of the roller beam. Arrange an overhead crane or a crane to transport the sling and the furnace roller as a whole to the designated furnace roller placement position, remove the two furnace roller hanging rings, and complete the entire furnace roller disassembly process.

[0036] The installation of the furnace rollers is the reverse process of the disassembly of the furnace rollers, that is, starting from the transportation, the above process can be reversed, which will not be repeated here.

[0037] Through the above embodiments, the present invention has the following beneficial effects or advantages:

[0038] 1) Compared with the prior art, the device for replacing the furnace rollers of a heating furnace in a cramped space provided by the present invention has a compact overall structure, simple operation, and a purely manual operation mode. It does not require the configuration of redundant pipelines and meets the requirements for replacing the furnace rollers of a heating furnace in a cramped space. The separate structure of the hanger and the roller-changing trolley facilitates the rapid transportation of the furnace rollers. The positioning studs can assist the roller-changing trolley to quickly adjust the roller-changing posture, avoiding repeated positioning work when multiple roller changes are required. The lifting device can control the cantilevered posture of the furnace roller during the roller changing process, which can effectively prevent the furnace roller from scratching the furnace wall or surrounding pipelines during the process of being pulled out or sent into the heating furnace, making the process of replacing the furnace roller smoother and significantly improving the efficiency of furnace roller replacement.

[0039] 2) The device for replacing the furnace rollers of a heating furnace in a cramped space provided by the present invention, the anti-tipping pull rods and the support rods can effectively ensure the stability of the roller changing trolley during the process of replacing the furnace rollers, and the double hanging ring structure improves the stability during the transportation of the furnace rollers. The device ensures the safe and efficient operation of the roller changing personnel in full working conditions.

[0040] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A device for replacing furnace rollers of a heating furnace in a cramped space, characterized in that: It comprises a roller hanging beam (1), a roller hanging frame (2), a transverse shifting device (3), a lifting device (4), a roller changing trolley (5), and a paving steel plate (6); the roller hanging frame (2) is suspended on the roller hanging beam (1), the transverse shifting device (3) is fixedly arranged on the roller hanging beam (1), the roller hanging frame (2) and the transverse shifting device (3) are connected by a screw nut, the roller hanging beam (1) is detachably placed on the roller changing trolley (5) and the lifting device (4), the lifting device (4) and the roller changing trolley (5) are connected by threads, and the roller changing trolley (5) is placed on the paving steel plate (6); The roller hanging beam (1) comprises a beam (11), a support frame (12), a connecting frame (13), and a furnace roller hanging ring assembly (14); there are two supporting frames (12), which are symmetrically arranged on both sides of the beam (11); the connecting frame (13) is fixedly connected to the beam (11); and the furnace roller hanging ring assembly (14) is movably arranged at the front end of the beam (11); The roller frame (2) comprises a roller (21), two groups of hanging plates (22), a hanger (23), a pressure roller block (24), and a furnace roller rear hanging ring (25); each group of the hanging plates (22) has two left and right plates, which are respectively arranged on both sides of the roller beam (1); the roller (21) is arranged on the inner side of the hanging plates (22); the hanger (23) is arranged between the hanging plates (22) and connected by threads; the pressure roller block (24) and the hanger (23) are connected by threads; the furnace roller rear hanging ring (25) and the hanger (23) are connected by a movable pin; The transverse movement device (3) comprises a handle (31), a large gear (32), a fixed seat (33), a locking screw (34), a small gear (35), and a lead screw (36); the center of the large gear (32) is movably connected to the fixed seat (33), the end surface of the large gear (32) is provided with the handle (31) and the locking screw (34), the large gear (32) and the small gear (35) are meshed with each other, and the small gear (35) is fixedly connected to the lead screw (36); The lifting device (4) comprises a hand wheel (41), a hand wheel screw (42), and a lifting seat (43); the hand wheel (41) is fixed on the hand wheel screw (42), and the lifting seat (43) is movably arranged on the upper end surface of the hand wheel (41); The roller changing trolley (5) comprises a vehicle body (51), a positioning fork (52), a pull rod (53), a support rod (54), and a wheel (55): the positioning fork (52) is movably connected to the vehicle body (51), the pull rod (53), the support rod (54) and the vehicle body (51) are all threadedly connected, and the wheel (55) is arranged on the bottom surface of the vehicle body (51).

2. The replacement device according to claim 1, characterized in that: The floor paving steel plate (6) is provided with positioning studs (61) and anti-tilt threaded holes.

3. The replacement device according to claim 1, characterized in that: The support frame (12) is a pin shaft with a fixed seat and can rotate freely in a groove corresponding to the roller changing trolley (5).

4. The replacement device according to claim 1, characterized in that: The furnace roller hanging ring assembly (14) comprises a crank handle (15), an eccentric shaft (16), and a furnace roller front hanging ring (17); the crank handle (15) is fixedly connected to the eccentric shaft (16), and the furnace roller front hanging ring (17) is arranged on the eccentric shaft (16).

5. The replacement device according to claim 1, characterized in that: The front wheel of the wheel (55) is a fixed wheel, and the rear wheel is a universal wheel with a brake.

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