Bar heating furnace door operating device

Abstract

The utility model discloses a kind of heating furnace door operating devices for bar, belong to bar production technical field, including the bracket trolley being set on track, bracket trolley is provided with furnace door body, bracket trolley is connected with driving component, furnace door body and bracket trolley are moved along horizontal direction on track under the driving of driving component, realize to open and close to furnace mouth;Bracket trolley includes bracket bottom plate and the roller being set on the end surface of bracket bottom plate, roller is cooperatively arranged in track, and positioning hole is arranged on the bracket bottom plate of furnace door body installation position;The lower end of furnace door body is provided with connecting component, and furnace door body is detachably connected with bracket bottom plate by the cooperation of connecting component and positioning hole.The utility model solves the safety hidden danger existing in person caused by the maintenance personnel of existing maintenance furnace door connecting iron chain, avoids the emergence of the fire out phenomenon caused by the fact that furnace mouth is not covered by furnace door cover after being scraped by steel billet, and reduces energy loss problem.

Description

Technical Field

[0001] This utility model belongs to the field of bar production technology, and in particular relates to a furnace door operating device for a heating furnace used for bars. Background Technology

[0002] In modern bar rolling processes, the heating furnace is a key piece of equipment in steel production. It is responsible for heating the steel billets to the required process temperature, thereby increasing their plasticity and reducing their resistance to deformation, facilitating subsequent rolling. The furnace door is a crucial device for the entry and exit of steel billets from the heating furnace; its proper opening and closing significantly impacts production. The tightness of its contact with the furnace opening can cause substantial fluctuations in energy consumption. Currently, the conventional design and installation of bar heating furnace doors is as follows: the door is slightly larger than the furnace opening size, filled with refractory material, and encased in thick steel plates, approximately square in shape. An iron ring on the upper side of the door connects to a steel wire rope above the furnace opening via a chain. This steel wire rope passes through a pulley system and connects to a hydraulic cylinder on the side of the furnace opening. When steel is being loaded or unloaded, the operator presses a button to move the hydraulic cylinder up and down. This up-and-down movement of the hydraulic cylinder moves the furnace door up and down, thus opening the furnace and allowing the billets to enter or exit.

[0003] However, in actual production, since the furnace door is installed before the furnace is ignited, once the furnace is heating the steel billets and operating normally, the iron chain connected to the furnace door is located above the door. When the steel billets enter or exit the furnace, the furnace flames subject the iron chain to high temperatures. Due to thermal expansion, the iron chain quickly becomes red-hot and elongates. Furthermore, the fixed stroke of the hydraulic cylinder causes the bottom of the furnace door to loosen in contact with the upper part of the furnace opening, leading to the upper part of the door tilting outwards and causing flame leakage. When the furnace door moves upwards to its limit, the bottom of the door scrapes against the steel billets, affecting the rhythm of steel entry and exit. Therefore, maintenance personnel must shorten the iron chain online. Because the furnace is constantly running, maintenance personnel work directly opposite the furnace opening, where there are risks of high-temperature radiation and gas poisoning, posing a significant risk to their personal safety. Moreover, because the heating furnace frequently heats the air-cooled billets, the billets often bend in the shape of "bananas". Due to improper entry position, the bent billets often scrape the left and right walls of the furnace opening when exiting the furnace, causing the furnace opening to become larger and larger. The original furnace door is difficult to cover the furnace opening, and flames are coming out around the furnace door, resulting in huge heat loss and unnecessary waste of energy. In this case, the furnace opening can only be dealt with after the furnace is shut down. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a furnace door operating device for a bar heating furnace, which solves the personal safety hazards caused by maintenance personnel repairing the furnace door connecting iron chain, avoids the furnace door not being able to cover the furnace opening after the furnace opening is scraped by the steel billet, thus preventing the occurrence of fire escaping, and also reduces energy consumption.

[0005] This utility model is implemented as follows: a furnace door operating device for a heating furnace for bar stock includes a bracket trolley set on a track, a furnace door body set on the bracket trolley, and a driving component connected to the bracket trolley. The furnace door body and the bracket trolley move horizontally on the track under the drive of the driving component, thereby opening and closing the furnace opening.

[0006] The bracket trolley includes a bracket base plate and rollers disposed on the lower end face of the bracket base plate. The rollers are fitted into a track. The bracket base plate located at the furnace door body installation position is provided with positioning holes. The lower end of the furnace door body is provided with a connecting member. The furnace door body and the bracket base plate are detachably connected through the cooperation of the connecting member and the positioning holes.

[0007] Furthermore, the furnace door body is filled with refractory material, the outer surface of the furnace door body is provided with a steel plate layer, and the upper end of the furnace door body is provided with a lifting ring.

[0008] Furthermore, the driving component is a hydraulic cylinder, which is connected to the bracket base plate of the bracket trolley via a hydraulic rod.

[0009] Furthermore, the connecting component is a positioning pin, which forms a pin-type connection between the bottom plates of the furnace door body bracket.

[0010] Furthermore, the movement direction of the furnace door body is perpendicular to the steel tapping direction. This is suitable for the entry and exit of billets in bar heating furnaces.

[0011] Furthermore, the cross-sectional area of ​​the furnace door body is 2.25 to 4 times that of the furnace opening. This more effectively seals the furnace opening, ensuring heating even if the opening is enlarged by a bent steel billet, making it suitable for on-site bar production.

[0012] The advantages and technical effects of this utility model are as follows: By adopting the above technical solution, the safety hazards caused by maintenance personnel repairing the furnace door connecting iron chain are solved, the furnace door cannot be covered after the furnace opening is scraped by the steel billet, which leads to the phenomenon of fire breaking, and the energy consumption problem is reduced.

[0013] A hydraulic cylinder is directly mounted on the rear of the bracket trolley, transforming the flexible connection into a rigid one. The extension and retraction of the hydraulic cylinder drives the bracket trolley at the bottom of the furnace door to run on the track. The furnace door body follows the bracket trolley, moving left or right, thus opening and closing the furnace door. This bracket trolley-driven door movement design eliminates the thermal expansion problem present in the original furnace door connection chain, ensuring normal furnace operation. The furnace door body and base support are simple to install and easy to disassemble; simply pull the hydraulic cylinder to the retracted position for overhead crane hoisting. It can also be pulled out at any time to replace with a spare furnace door, allowing for offline maintenance and effectively eliminating safety hazards to maintenance personnel during on-site furnace door repairs. Furthermore, the furnace door design is significantly larger than the original furnace door size, effectively sealing the furnace opening. Even if the furnace opening is enlarged by steel billets, the door's tightness is still maintained, reducing energy loss.

[0014] In summary, this application achieves a comprehensive improvement in flexibility, convenience, security, energy efficiency, and work efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided in the embodiment of this utility model.

[0016] Figure 2 This is a front view of the overall structure provided in an embodiment of this utility model.

[0017] Figure 3 This is a left view of the overall structure provided in an embodiment of this utility model.

[0018] In the diagram: 1. Bracket trolley; 1-1. Bracket base plate; 1-2. Roller; 2. Furnace door body; 2-1. Lifting ring; 2-2. Steel plate layer; 3. Drive component; 4. Furnace opening; 5. Track; 6. Connecting component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0020] It should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] like Figures 1 to 3As shown, this application provides a furnace door operating device for a bar heating furnace, including a bracket trolley 1 mounted on a track 5. A furnace door body 2 is mounted on the bracket trolley 1, and a driving component 3 is connected to the bracket trolley 1. The furnace door body 2 and the bracket trolley 1 move horizontally along the track 5 under the drive of the driving component 3, thereby opening and closing the furnace opening 4. Specifically, the movement direction of the furnace door body 2 is perpendicular to the steel tapping direction. This device is suitable for the entry and exit of billets in bar heating furnaces.

[0022] The bracket trolley 1 includes a bracket base plate 1-1 and rollers 1-2 disposed on the lower end face of the bracket base plate 1-1. The rollers 1-2 are fitted into the track 5. The bracket base plate 1-1, located at the installation position of the furnace door body 2, is provided with positioning holes. The lower end of the furnace door body 2 is provided with a connecting member 6. The furnace door body 2 and the bracket base plate 1-1 are detachably connected through the cooperation of the connecting member 6 and the positioning holes.

[0023] Furthermore, the furnace door body 2 is filled with refractory material, the outer surface of the furnace door body 2 is provided with a steel plate layer 2-2, and the upper end of the furnace door body 2 is provided with a lifting ring 2-1.

[0024] Furthermore, the driving component 3 is a hydraulic cylinder, which is connected to the bracket base plate 1-1 of the bracket trolley 1 via a hydraulic rod.

[0025] Furthermore, the connecting member 6 is a positioning pin, which forms a pin-type connection between the furnace door body 2 bracket base plate 1-1.

[0026] Furthermore, the cross-sectional area of ​​the furnace door body 2 is 2.25 to 4 times that of the furnace opening 4. This more effectively blocks the furnace opening 4, ensuring heating even if the furnace opening 4 is enlarged by a bent steel billet, making it suitable for on-site bar production.

[0027] Opening the furnace door:

[0028] When the heating furnace heats the steel billet to the required temperature, the furnace discharge button is pressed, the hydraulic cylinder moves in the shrinking direction, driving the bracket trolley 1 to move backward. The bracket trolley 1 then drives the furnace door body 2, which is connected to it by a positioning pin, to move backward, and the furnace door opens.

[0029] Closing the furnace door:

[0030] When the steel billet has finished exiting the furnace, or when the steel billet needs to be heated and steel is not being discharged for the time being, the furnace door closing button is pressed briefly. The hydraulic cylinder moves in the extension direction, which drives the bracket trolley 1 forward. The bracket trolley 1 drives the furnace door body 2, which is connected to it by a positioning pin, forward, and the furnace door closes.

[0031] Replacing the furnace door:

[0032] If the furnace door needs repair, after the furnace door opening action is completed, use the overhead crane chain to hang the furnace door currently in use at position 2-1 and lift the furnace door to the maintenance platform area for repair. At the same time, use the overhead crane chain to hang the spare furnace door at position 2-1 and install the positioning pin at the bottom of the spare furnace door into the positioning hole on the bracket trolley 1. Then start the furnace door closing action, and the furnace door will close automatically.

[0033] By adopting the above technical solution, the safety hazards caused by maintenance personnel repairing the furnace door connecting iron chain are solved, the phenomenon of fire breaking that occurs when the furnace door cannot cover the furnace opening 4 after the furnace opening 4 is scraped by the steel billet is reduced, and the energy consumption problem is reduced.

[0034] A hydraulic cylinder is directly installed on the rear side of the bracket trolley 1, transforming the flexible connection into a rigid one. The extension and retraction of the hydraulic cylinder drives the bottom bracket trolley 1 of the furnace door to run on the track 5. The furnace door body 2 follows the bracket trolley 1, moving left or right, thereby opening and closing the furnace door body 2. The design of the bracket trolley 1 driving the furnace door movement eliminates the thermal expansion problem present in the original furnace door connecting chain, ensuring the normal operation of the furnace. The furnace door body 2 and the base support are simple to install and easy to disassemble; simply pull the hydraulic cylinder to the retracted position for overhead crane hoisting. It can also be pulled out at any time to replace the spare furnace door for offline maintenance, effectively eliminating safety hazards to maintenance personnel during furnace door repairs. Simultaneously, the furnace door design is much larger than the original furnace door size, effectively blocking the furnace opening 4. Even if the furnace opening 4 is enlarged by the steel billet, the furnace door's tightness is still guaranteed, reducing energy loss.

[0035] In summary, this application achieves a comprehensive improvement in flexibility, convenience, security, energy efficiency, and work efficiency.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A furnace door operating device for a heating furnace for bar stock, characterized in that, It includes a bracket trolley mounted on a track, a furnace door body mounted on the bracket trolley, and a drive component connected to the bracket trolley. The furnace door body and the bracket trolley move horizontally on the track under the drive of the drive component, thereby opening and closing the furnace opening. The bracket trolley includes a bracket base plate and rollers disposed on the lower end face of the bracket base plate. The rollers are fitted into a track. The bracket base plate located at the furnace door body installation position is provided with positioning holes. The lower end of the furnace door body is provided with a connecting member. The furnace door body and the bracket base plate are detachably connected through the cooperation of the connecting member and the positioning holes.

2. The furnace door operating device for a heating furnace for bar stock according to claim 1, characterized in that, The furnace door body is filled with refractory material, and the outer surface of the furnace door body is provided with a steel plate layer. The upper end of the furnace door body is provided with a lifting ring.

3. The furnace door operating device for a heating furnace for bar stock according to claim 1, characterized in that, The driving component is a hydraulic cylinder, which is connected to the base plate of the bracket trolley via a hydraulic rod.

4. The furnace door operating device for a heating furnace for bar stock according to claim 1, characterized in that, The connecting component is a positioning pin, which forms a pin-type connection between the bottom plate of the furnace door body bracket.

5. The furnace door operating device for a heating furnace for bar stock according to claim 1, characterized in that, The movement direction of the furnace door body is perpendicular to the steel tapping direction.

6. The furnace door operating device for a heating furnace for bar stock according to claim 1, characterized in that, The cross-sectional area of ​​the furnace door body is 2.25 to 4 times the cross-sectional area of ​​the furnace opening.

Images