Multifunctional rack suitable for steel billet heating furnace entering and heat preservation furnace entering and discharging and using method

Abstract

The invention discloses a multifunctional rack suitable for steel billet heating furnace entering and heat preservation furnace entering and discharging and a using method. According to the technical scheme, the multifunctional rack suitable for the heating furnace entering and heat preservation furnace entering and discharging of the steel billets comprises stand columns used for bearing loads and installing the rack, a static beam system and a movable beam system, and the static beam system and the movable beam system are installed on the stand columns correspondingly; the movable beam system slides back and forth in the static beam system, a steel shifting driving device is arranged on the movable beam system, and the steel shifting driving device has a one-way steel pushing function, can adapt to square billets and rectangular billets with the width larger than 165 mm and can improve the steel rolling billet charging temperature, improve the steel rolling hot charging and hot conveying efficiency and avoid energy waste. And emission reduction of the heating furnace is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of steel production technology, specifically relating to a multi-functional frame suitable for heating and holding steel billets before and after charging and uncharting them into the furnace, and its usage method. Background Technology

[0002] In the steel production process, the casting speed of steelmaking casting machines is generally greater than the rolling speed of steel rolling, meaning there is a certain margin in the casting speed to ensure the continuity of steel rolling. Therefore, the Kunming Iron and Steel Group's steel rolling mill's profile production line requires an automatic holding furnace to store excess hot billets from steelmaking for insulation. When rolling is required, the billets will still retain a certain amount of heat, preventing complete cooling followed by reheating, thus avoiding energy waste and reducing emissions from the heating furnace. This profile holding furnace facility requires occupying the existing cold billet loading platform space and installing a feeding device to transfer billets from the holding furnace into the heating furnace. This leads to the following problems: When hot billets from steelmaking need to enter the holding furnace, how should they be pushed out of the furnace feed roller conveyor and into the holding furnace billet assembly roller conveyor? After the original cold billet loading platform is occupied, how should billets from other production lines (cold billets from other production lines and cold billets from this production line) enter the heating furnace via the feed roller conveyor? The feed roller conveyor must perform multiple functions, including entering the heating furnace, entering the holding furnace, and exiting the holding furnace. Furthermore, due to space limitations, all these operations must be performed at the same end of the holding furnace and the same end of the heating furnace.

[0003] like Figure 1 As shown, the billet charging process in a typical steel rolling mill generally involves two paths: Path 1, direct hot charging and hot delivery. The steelmaking casting machine has a production capacity of approximately 150 tons per hour, with most of the billets directly entering the section heating furnace via roller conveyors 1, 2, 3, and 4. Path 2, where the hourly output of the casting machine exceeds that of the section heating machine, or where continuous hot delivery is not possible for various reasons, involves the billets being lifted by steelmaking clamps to a cross-sectional flatcar, transported by the flatcar to the section material stack, and then lifted to the section loading platform before entering the heating furnace.

[0004] In the second path mentioned above, if the continuous casting production capacity is greater than the rolling production capacity or the hot delivery does not correspond to the specifications of the rolled products, the hot billets that cannot be put into the furnace in the current period need to be taken off the line. After being taken off the line, the billet temperature drops, and the gas consumption is even greater when it is reheated in the heating furnace, which increases gas consumption and emissions.

[0005] The purpose of a steel rolling mill holding furnace is to hold the billet in a preheated furnace while it is still warm or at a relatively high temperature, and then remove it from the holding furnace and load it into the heating furnace when needed. This increases the loading temperature of the billet and reduces the gas consumption of the heating furnace. Due to space limitations, to perform multiple functions such as loading into the heating furnace, loading into the holding furnace, and unloading from the holding furnace, these operations must be carried out at the same end of the holding furnace and the heating furnace.

[0006] In other words, this invention addresses the challenge of propelling hot-charged steel billets from the hot-feeding and furnace-entry roller conveyor to the holding furnace's billet-collecting roller conveyor when they need to enter the holding furnace. It also solves the problem of transporting various billets in batches to designated locations and then individually transferring them to the heating furnace's furnace-entry roller conveyor. This enables multiple functions, including heating furnace entry, holding furnace entry, and holding furnace exit. Due to space limitations, these multiple functions must be performed at the same end of the holding furnace and the heating furnace, necessitating a multi-functional frame and method for steel billet heating and holding furnace entry / exit. It is suitable for square and rectangular billets with a width greater than 165mm, increasing the billet entry temperature into the furnace, improving the efficiency of hot charging and hot-feeding in rolling mills, avoiding energy waste, and reducing emissions from the heating furnace.

[0007] Therefore, in view of the above-mentioned technical problems and defects, there is an urgent need to design and develop a multi-functional frame suitable for heating and holding steel billets before and after charging and uncharting them, as well as its usage method. Summary of the Invention

[0008] To overcome the shortcomings and difficulties of the existing technology, the first objective of this invention is to provide a multifunctional frame suitable for heating and holding steel billets before and after charging.

[0009] The second objective of this invention is to provide a method for using a multi-functional frame suitable for heating and holding steel billets before and after charging and uncharting them into the furnace.

[0010] The first objective of the present invention is achieved as follows: the multifunctional platform includes columns for bearing loads and mounting the platform, and a static beam system and a dynamic beam system respectively mounted on the columns; The moving beam system slides back and forth inside the stationary beam system. The moving beam system is equipped with a steel-pushing drive device, which has a unidirectional steel-pushing function.

[0011] The second objective of this invention is achieved as follows: the method includes the steps of: Hot billets from steelmaking are directly loaded into the heating furnace. The multi-functional frame for heating and holding the billets before loading and unloading retracts to a non-working position, with its front end positioned along the side edge of the first, second, third, and fourth sections of the loading roller conveyor. When the hot billets are vertical, the multi-functional frame for heating and holding the billets does not operate, and the billets directly pass through the first, second, third, and fourth sections of the loading roller conveyor into the heating furnace. When the hot billets tilt at the first section of the loading roller conveyor, the moving beam 3 of the multi-functional frame gently moves to push the billets back to their upright position. This ensures the hot billets continue to pass directly through the first, second, third, and fourth sections of the loading roller conveyor into the heating furnace. Hot billets are loaded into the holding furnace and then into the heating furnace; wherein: hot billets are pushed to the holding furnace billet assembly roller conveyor via the furnace entry roller conveyor; when hot billets are loaded into the holding furnace, an entry and exit platform is used, and the hot billet assembly is hoisted into the holding furnace by an unmanned crane from the holding furnace billet assembly roller conveyor; when hot billets are discharged from the holding furnace, an entry and exit platform is used, and the hot billet assembly is hoisted from the holding furnace by an unmanned crane from the holding furnace to the three sections of the heating furnace entry roller conveyor; hot billets enter the heating furnace through the three sections of the entry roller conveyor and the four sections of the entry roller conveyor. The billet assembly is loaded into the heating furnace via a multi-functional platform. The process involves: a crane lifting the billet assembly onto the stationary beam of the multi-functional platform for both heating and heat preservation before and after the billet enters the furnace; the hydraulic cylinder of the steel-pushing drive device on the multi-functional platform quickly pushes forward, causing the moving beam to move forward; the billet assembly slides rapidly along the track on the stationary beam; when the billet assembly reaches the small notch on the stationary beam, the hydraulic cylinder of the steel-pushing drive device retracts; the hydraulic cylinder of the steel-pushing drive device slowly pushes forward, causing the moving beam to move the width of a single billet section; the first billet in the assembly falls into the small notch on the stationary beam, thus contacting the first section of the furnace feed roller conveyor; a single billet enters the heating furnace via sections 1, 2, 3, and 4 of the furnace feed roller conveyor.

[0012] This invention provides a multi-functional platform suitable for heating and holding steel billets before and after charging. The platform includes columns for bearing loads and mounting the platform, as well as a static beam system and a dynamic beam system mounted on the columns. The dynamic beam system slides back and forth within the static beam system. A steel-pushing drive device is installed on the dynamic beam system, which has a unidirectional pushing function and can accommodate square and rectangular billets with a width greater than 165mm. This improves the furnace entry temperature of rolled steel billets, increases the efficiency of hot charging and hot delivery, avoids energy waste, and helps reduce emissions from the heating furnace.

[0013] In other words, this invention achieves multiple functional operations, including charging into the heating furnace, charging into the holding furnace, and discharging from the holding furnace. These operations must be performed at the same end of the holding furnace and the heating furnace, thus solving the space limitation problem. Furthermore, the corresponding working method allows for fully intelligent, unmanned operation. It can handle square and rectangular billets with a width greater than 165mm, and can increase the furnace entry temperature of rolled steel billets, improve the efficiency of hot charging and hot delivery in steel rolling, avoid energy waste, and help reduce emissions from the heating furnace. Specifically, the direct charging of hot billets into the heating furnace, the charging of hot billets into the holding furnace and the charging into the heating furnace, and the charging of the finished steel billet group into the heating furnace via a multi-functional platform are performed separately. Attached Figure Description

[0014] Figure 1 This is the general billet charging process in a steel rolling mill, as described in existing technologies. Figure 2 This is a schematic diagram of a multi-functional frame process suitable for heating and holding steel billets before and after charging and uncharting them, according to the present invention. Figure 3a This is a schematic diagram of the main structure of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 3b This is a schematic diagram of the left side of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 3c This is a partial enlarged structural diagram (left view) of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 3d This is a top view schematic diagram of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 3e This is a three-dimensional structural diagram of a multifunctional frame suitable for heating and holding steel billets before and after charging / discharging from the furnace according to the present invention. Figure 4a This is a schematic diagram of the main structure of the static beam system of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 4b This is a partial enlarged structural diagram (A) of the static beam system of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 4c This is a left-side structural schematic diagram of the static beam system of a multifunctional frame suitable for heating and holding steel billets before and after charging. Figure 4d This is a three-dimensional structural diagram of the static beam system of a multifunctional platform suitable for heating and holding steel billets before and after charging. Figure 5 This is a schematic diagram of the moving beam system of a multifunctional platform suitable for heating and holding steel billets before and after charging. Figure 6 This is a schematic diagram of the steel-pushing drive device of a multi-functional platform suitable for heating and holding steel billets before and after charging. Figure 7a This is a schematic diagram of an embodiment of the multifunctional platform of the present invention, which is suitable for heating and holding steel billets before and after charging. Figure 7b This is a schematic diagram of a second embodiment of the multifunctional platform of the present invention, which is suitable for heating and holding steel billets before and after charging and uncharting them. Figure 7c This is a third embodiment of the present invention, which is a multifunctional platform suitable for heating and holding steel billets before and after charging and uncharting them. Figure 7d This is a schematic diagram of Embodiment 4 of the present invention, which describes a multifunctional platform suitable for heating and holding steel billets before and after charging. In the picture, 1-Column; 2-Static beam system; 201-Longitudinal beam; 202-Baffle; 203-Railway; 204-Moving beam guide plate; 205-Moving beam space; 206-Railway notch; 3-Moving beam system; 301-Moving beam body; 302-Pulling steel plate; 303-Pulling steel plate shaft; 304-Pulling steel plate limiting block; 305-Guide wheel assembly; 306-Connecting support; 4-Pulling steel drive device; 401-Hydraulic cylinder; 40 2-Shaft; 403-Drive crank; 404-Bearing housing; 405-Connecting crank; 406-Connecting rod; 1001-Heating furnace body; 1002-Heating furnace billet collection roller conveyor; 1003-Single billet; 1004-Offline billet group; 1005-Heating furnace inlet roller conveyor; 1006-Multi-functional frame; 1007-First single billet; 1008-Second single billet; 1009-Bill group entering the heating furnace. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but this is not intended to limit the present invention in any way. Any modifications or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0016] As attached Figure 1 As shown in Figure 7, the present invention provides a multi-functional frame suitable for heating and holding steel billets before and after charging / discharging them into the furnace. The multi-functional platform includes columns for bearing loads and mounting the platform, as well as a static beam system and a dynamic beam system respectively mounted on the columns; The moving beam system slides back and forth inside the stationary beam system. The moving beam system is equipped with a steel-pushing drive device, which has a unidirectional steel-pushing function.

[0017] The static beam system consists of multiple static beams; each static beam includes a longitudinal beam, a baffle, a track, a moving beam guide plate, a moving beam space, and a small notch in the track.

[0018] The longitudinal beam is composed of two welded H-beams, forming a movable beam space in the middle, which allows the movable beam to move freely within the movable beam space.

[0019] The upper and lower flanges of the longitudinal beam are respectively provided with moving beam guide plates, so that the moving beam wheels can reduce the moving friction under the guidance of the moving beam guide plates. The moving beam guide plates are connected to the longitudinal beam by bolts.

[0020] The moving beam system includes a moving beam body, a steel plate, a steel plate shaft, a steel plate limiting block, a guide wheel assembly, and a connecting support. The beam body is composed of two thick steel plates, with a rotation space provided between the thick steel plates for a steel plate.

[0021] The steel plate is a right-angled triangle with a low center of gravity, and it automatically remains vertical under the action of gravity.

[0022] The steel-pulling drive device includes a hydraulic cylinder, a rotating shaft, a drive crank, a bearing housing, a connecting crank, and a connecting rod; When the hydraulic cylinder extends forward, it drives the rotating shaft to rotate in the bearing seat via the drive crank; the rotating shaft drives the connecting crank and drives the moving beam to move forward via the connecting rod; conversely, when the hydraulic cylinder retracts backward, the moving beam moves backward.

[0023] Specifically, in this embodiment of the invention, a multi-functional frame for heating and holding steel billets before and after charging is provided, comprising a steel structure frame column 1, a static beam system 2, a dynamic beam system 3, and a steel-pushing drive device 4.

[0024] The multi-functional test bench device and its components are shown in Figure 3. The steel frame columns form the basic main structure of the multi-functional test bench, used to bear loads and install other parts of the bench. Tracks are installed on the static beam system to directly contact and support the steel billets. When the steel billets are moved, the tracks also act as slide rails, allowing the billets to slide forward.

[0025] As shown in Figure 4, the static beam system is installed on the steel frame columns, forming a whole. The moving beam system slides back and forth inside the static beam system. The moving beam system has steel guide plates, which are arranged in groups and have a unidirectional pushing function.

[0026] When the moving beam moves forward, it pushes the steel billet being fed or placed in the holding furnace forward to the working position. When the moving beam retracts, the steel-pushing plate retracts. The steel-pushing drive mechanism adopts a linkage mechanism, which is driven by a hydraulic cylinder to realize the reciprocating motion of the moving beam, thereby driving the steel-pushing plate to push the steel billet.

[0027] The static beam system consists of multiple static beams, the number of which depends on the length of the steel billet to be conveyed, with 3-5 beams being preferable. Each static beam consists of: a longitudinal beam 201; a baffle 202; a track 203; a moving beam guide plate 204; a moving beam space 205; and a track notch 206. The longitudinal beam 201 is composed of two welded H-beams, forming the moving beam space 205 in the middle, allowing the moving beam to move freely within 205. To facilitate the movement of the moving beam in 205, moving beam guide plates 204 are respectively installed on the inner side of the upper and lower flanges of the longitudinal beam 201. This allows the moving beam wheels to reduce friction under the guidance of the moving beam guide plates 204. The moving beam guide plates 204 are connected to the longitudinal beam 201 by bolts and can be replaced after wear.

[0028] A baffle 202 is installed on the longitudinal beam to stop the steel billets. A track 203 is installed on the moving beam, and the billet loading group is placed directly on the track 203. When the steel pushing mechanism pushes the billet loading group, the billet group slides forward on the track. A small notch 206 is provided on the track 203. Its function is that when the billet loading group moves to the small notch 206, when it is pushed again, the first billet at the front falls from the rail into the small notch, thus falling onto the conveyor roller, and then entering the heating furnace from the conveyor roller.

[0029] As attached Figure 5 As shown, the moving beam system consists of a moving beam body 301; a steel plate 302; a steel plate shaft 303; a steel plate limiting block 304; a guide wheel assembly 305; and a connecting support 306. The moving beam body 301 is composed of two thick steel plates, with a rotation space between the thick steel plates for the steel plate 302. The steel-pushing plate 302 is a right-angled triangle with its center of gravity low. Under gravity, it automatically remains vertical. When the moving beam moves to the right, it drives the steel-pushing plate to move to the right, and the right-angled side of the plate pushes the feeding billet assembly to the right. As the steel-pushing plate pushes the feeding billet assembly to the right, the steel-pushing plate retains its vertical position due to the action of the steel-pushing plate limiting block 304. When the moving beam moves to the left, the steel-pushing plate limiting block 304 rotates around the steel-pushing plate axis 303 due to the hypotenuse of the steel-pushing plate. After the moving beam reaches its leftward position, the steel-pushing plate returns to vertical under gravity. A guide wheel assembly 305 is installed on the moving beam. When the moving beam moves, the guide wheel assembly guides the beam and prevents it from jumping up and down. The guide wheel assembly also has rims, which limit the left and right movement of the moving beam. A connecting support 306 is installed on the moving beam to facilitate connection between the moving beam and the steel-pushing drive device.

[0030] like Figure 6 As shown, the steel-pushing drive device consists of: a hydraulic cylinder 401; a rotating shaft 402; a drive crank 403; a bearing housing 404; a connecting crank 405; and a connecting rod 406. When the hydraulic cylinder 401 extends forward, it drives the rotating shaft 402 to rotate within the bearing housing 404 via the drive crank 403; the rotating shaft 402 drives the connecting crank 405, which in turn drives the moving beam forward via the connecting rod 406; conversely, when the hydraulic cylinder 401 retracts, the moving beam moves backward, thereby achieving reciprocating steel pushing.

[0031] To achieve the objective of this invention, a method for using a multi-functional frame suitable for heating and holding steel billets before and after charging / discharging is also provided. The method includes the following steps: Hot billets from steelmaking are directly loaded into the heating furnace. The multi-functional frame for heating and holding the billets before loading and unloading retracts to a non-working position, with its front end positioned along the side edge of the first, second, third, and fourth sections of the loading roller conveyor. When the hot billets are vertical, the multi-functional frame for heating and holding the billets does not operate, and the billets directly pass through the first, second, third, and fourth sections of the loading roller conveyor into the heating furnace. When the hot billets tilt at the first section of the loading roller conveyor, the moving beam 3 of the multi-functional frame gently moves to push the billets back to their upright position. This ensures the hot billets continue to pass directly through the first, second, third, and fourth sections of the loading roller conveyor into the heating furnace. Hot billets are loaded into the holding furnace and then into the heating furnace; wherein: hot billets are pushed to the holding furnace billet assembly roller conveyor via the furnace entry roller conveyor; when hot billets are loaded into the holding furnace, an entry and exit platform is used, and the hot billet assembly is hoisted into the holding furnace by an unmanned crane from the holding furnace billet assembly roller conveyor; when hot billets are discharged from the holding furnace, an entry and exit platform is used, and the hot billet assembly is hoisted from the holding furnace by an unmanned crane from the holding furnace to the three sections of the heating furnace entry roller conveyor; hot billets enter the heating furnace through the three sections of the entry roller conveyor and the four sections of the entry roller conveyor. The billet assembly is loaded into the heating furnace via a multi-functional platform. The process involves: a crane lifting the billet assembly onto the stationary beam of the multi-functional platform for both heating and heat preservation before and after the billet enters the furnace; the hydraulic cylinder of the steel-pushing drive device on the multi-functional platform quickly pushes forward, causing the moving beam to move forward; the billet assembly slides rapidly along the track on the stationary beam; when the billet assembly reaches the small notch on the stationary beam, the hydraulic cylinder of the steel-pushing drive device retracts; the hydraulic cylinder of the steel-pushing drive device slowly pushes forward, causing the moving beam to move the width of a single billet section; the first billet in the assembly falls into the small notch on the stationary beam, thus contacting the first section of the furnace feed roller conveyor; a single billet enters the heating furnace via sections 1, 2, 3, and 4 of the furnace feed roller conveyor.

[0032] The process of loading the hot billet into the holding furnace and the heating furnace includes: the hot billet being pushed into the holding furnace assembly roller conveyor via the furnace entry roller conveyor, and further includes: Hot billets from steelmaking arrive one by one at the first section of the inlet roller conveyor of the heating furnace; the hydraulic cylinder of the steel-pushing drive device of the multi-functional platform pushes forward, driving the moving beam forward; the moving beam pushes the steel billets on the first section of the roller conveyor toward the billet assembly roller conveyor of the holding furnace; the hydraulic cylinder of the steel-pushing drive device retracts backward, driving the moving beam backward, and the steel-pushing plates on the moving beam are pressed down by the steel billets; after the moving beam retracts into position, the steel-pushing plates on the moving beam return to vertical under the action of gravity; the above steps are repeated to make the required number of steel billets.

[0033] Specifically, in the embodiments of the present invention, a working method for a multi-functional rack for heating and holding steel billets before and after charging includes the following steps, applicable to square and rectangular billets with a width greater than or equal to 165mm, and fully automated unmanned operation. Specifically, hot billets are directly loaded into the heating furnace, while the loading of hot billets into the holding furnace and the heating furnace, and the loading of the finished steel billet group into the heating furnace via the multi-functional rack, are performed at different times.

[0034] Hot billets from steelmaking are directly charged into the heating furnace: (1) The multi-functional frame moving beam 3 for heating and heat preservation of steel billets is retracted to the non-working position. The front end of the moving beam 3 is located on the side edge of the front part of the first, second, third and fourth sections of the furnace roller conveyor.

[0035] (2) When the hot billet from the steelmaking process is kept vertical, the multi-functional frame for heating the billet into the furnace and keeping it warm before entering and exiting the furnace does not operate. The hot billet directly enters the heating furnace through the first, second, third and fourth sections of the furnace entry roller conveyor.

[0036] (3) When the hot billet from the steelmaking process is tilted at the first section of the inlet roller conveyor, the moving beam 3 of the multi-functional frame for heating and heat preservation of the billet before it enters and exits the furnace will gently move to push the billet back to the correct position. This ensures that the hot billet continues to pass directly through the first, second, third, and fourth sections of the inlet roller conveyor into the heating furnace.

[0037] Hot billets are loaded into the holding furnace and the heating furnace: 1. The hot billet is pushed to the billet assembly roller conveyor of the holding furnace via the furnace feed roller conveyor.

[0038] (1) The hot billets from steelmaking arrive one by one at the front end of the first section of the furnace feed roller conveyor.

[0039] (2) The hydraulic cylinder 401 of the steel-pulling drive device 4 of the multi-functional platform pushes forward, driving the moving beam 3 to move forward.

[0040] (3) The moving beam 3 pushes the steel billet on the first section of the roller table forward to move towards the billet group roller table of the heat preservation furnace.

[0041] (4) The hydraulic oil 401 of the steel-pulling drive device 4 retracts backward, driving the moving beam 3 to move backward, and the steel-pulling plate 302 on the moving beam 3 is pressed by the steel billet; (5) After the moving beam 3 is moved into place, the steel plate 302 of the moving beam 3 returns to vertical under the action of gravity.

[0042] (6) Repeat steps 1-5 above to make the required number of steel billets.

[0043] 2. When hot billets are loaded into the holding furnace, an in-and-out pit platform is used, and the hot billet group is hoisted into the holding furnace by an unmanned crane from the billet rollers of the holding furnace group; 3. When hot billets exit the holding furnace, an inlet / outlet platform is used for simultaneous entry and exit. The hot billet assembly is hoisted from inside the holding furnace to the three sections of roller conveyor for the heating furnace by an unmanned crane. 4. The hot billet enters the heating furnace through the three-section roller conveyor and the four-section roller conveyor.

[0044] The steel billet assemblies are loaded into the heating furnace via a multi-functional frame: (1) The overhead crane lifts the billet assembly off the line onto the multi-functional platform static beam 2, which is used for heating and heat preservation of the billet before it enters and exits the furnace.

[0045] (2) The hydraulic cylinder of the steel-pulling drive device 4 of the multi-functional platform is pushed forward quickly, which drives the moving beam 3 to move forward.

[0046] (3) The billet group slides rapidly on the track 203 of the static beam 2.

[0047] (4) When the billet group reaches the small notch 206 on the static beam 2, the hydraulic cylinder 401 of the steel-pulling drive device 4 retracts.

[0048] (5) The hydraulic cylinder 401 of the steel-pulling drive device 4 slowly pushes forward, causing the moving beam 3 to move the width of the single billet section.

[0049] (6) The first billet of the billet group falls into the small notch 206 on the static beam 2, thus contacting the first section of the furnace feed roller conveyor. The single billet enters the heating furnace through the first, second, third and fourth sections of the furnace feed roller conveyor. Implementation method: As shown in Figure 7, the present invention provides a multifunctional frame and method for heating and holding steel billets before and after charging. It is suitable for square and rectangular billets with a width greater than 165mm, which can increase the charging temperature of steel billets, improve the efficiency of hot charging and hot delivery, avoid energy waste, and help reduce emissions from the heating furnace.

[0050] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0051] Specifically, as shown in Figure 7 below, the figure shows the following: 1001 – the holding furnace body; 1002 – the holding furnace billet collecting roller conveyor; 1003 – a single billet (falling into the furnace feed roller conveyor through the small gap in the static beam); 1004 – the off-line billet group (loaded from the platform into the heating furnace); 1005 – the heating furnace feed roller conveyor; 1006 – the multi-functional platform; 1007 – the first single billet (normal billet feeding during steelmaking); 1008 – the second single billet (about to be pushed to the holding furnace billet collecting roller conveyor); and 1009 – the billet group entering the holding furnace. The dual-function platform for billet loading into the furnace and hot billet entering the holding furnace operates in the following ways: (1) When loading, the overhead crane lifts the hot billet group to the multi-functional platform. The pusher of the multi-functional platform quickly pushes the billet group to the determined position. Then the pushing speed slows down and the pushing stroke becomes smaller, pushing the first billet of the billet group to the hot delivery and furnace roller conveyor. The furnace roller conveyor transports the single billet to the heating furnace.

[0052] (2) When the hot steel billet is delivered by the steelmaking process, it normally enters the heating furnace through the hot delivery and furnace entry rollers. At this time, the hot steel billet group does not move, and a single hot steel billet continuously enters the heating furnace.

[0053] (3) When the billet needs to enter the holding furnace, the multi-functional platform will move to push the single billet on the hot delivery and furnace entry roller to the holding furnace billet collection roller to form a furnace entry billet group, thereby completing the function of furnace entry billet group, and then the furnace entry billet group will be hoisted into the holding furnace by the crane.

[0054] Effect: A multi-functional frame and method for heating and holding steel billets into and out of the furnace realizes multiple functions such as feeding into the heating furnace, feeding into the holding furnace, and discharging from the holding furnace. All these functions must be performed at the same end of the holding furnace and the same end of the heating furnace, thus solving the problem of space limitation.

[0055] A working method for a multi-functional rack for heating and holding steel billets before and after charging / discharging them into the furnace is disclosed, enabling fully automated, unmanned operation. Specifically, the direct loading of hot billets into the heating furnace, the loading of hot billets into the holding furnace and the charging into the heating furnace, and the loading of the finished steel billet assembly into the heating furnace via the multi-functional rack are performed separately but not simultaneously.

[0056] A working method for a multi-functional rack for heating and holding steel billets before and after loading into and unloading the furnace, which can handle square and rectangular billets with a width greater than 165mm.

[0057] A working method for a multi-functional frame for heating and holding steel billets before and after charging / discharging can improve the temperature of steel billets entering the furnace, increase the efficiency of hot charging and hot delivery, avoid energy waste, and help reduce emissions from the heating furnace.

[0058] This invention provides a multi-functional platform suitable for heating and holding steel billets before and after charging. The platform includes columns for bearing loads and mounting the platform, as well as a static beam system and a dynamic beam system mounted on the columns. The dynamic beam system slides back and forth within the static beam system. A steel-pushing drive device is installed on the dynamic beam system, which has a unidirectional pushing function and can accommodate square and rectangular billets with a width greater than 165mm. This improves the furnace entry temperature of rolled steel billets, increases the efficiency of hot charging and hot delivery, avoids energy waste, and helps reduce emissions from the heating furnace.

[0059] In other words, this invention achieves multiple functional operations, including charging into the heating furnace, charging into the holding furnace, and discharging from the holding furnace. These operations must be performed at the same end of the holding furnace and the heating furnace, thus solving the space limitation problem. Furthermore, the corresponding working method allows for fully intelligent, unmanned operation. It can handle square and rectangular billets with a width greater than 165mm, and can increase the furnace entry temperature of rolled steel billets, improve the efficiency of hot charging and hot delivery in steel rolling, avoid energy waste, and help reduce emissions from the heating furnace. Specifically, the direct charging of hot billets into the heating furnace, the charging of hot billets into the holding furnace and the charging into the heating furnace, and the charging of the finished steel billet group into the heating furnace via a multi-functional platform are performed separately.

Claims

1. A multifunctional stand suitable for heating billets into a furnace and keeping them warm when entering and leaving the furnace, characterized in that: The multifunctional platform comprises a column for carrying loads and installing the platform, and a static beam system and a dynamic beam system respectively installed on the column; The movable beam system slides forward and backward inside the static beam system. A steel-pushing driving device is provided on the movable beam system. The steel-pushing driving device has a one-way steel-pushing function.

2. A multifunctional stand suitable for heating billets into a furnace and keeping them warm in and out of a furnace according to claim 1, characterized in that: The static beam system is composed of a plurality of static beams; The static beam comprises a longitudinal beam, a baffle, a track, a moving beam guide plate, a moving beam space and a small track notch.

3. A multifunctional stand suitable for heating billets into a furnace and keeping them warm into and out of a furnace according to claim 2, characterized in that: The longitudinal beam is composed of two welded H-shaped steels, and a moving beam space is formed in the middle, so that the moving beam can move freely in the moving beam space.

4. A multifunctional stand suitable for heating billets into a furnace and keeping them warm into and out of a furnace according to claim 2 or 3, characterized in that: Moving beam guide plates are respectively arranged on the inner sides of the upper and lower wing plates of the longitudinal beam, so that the moving beam wheels can reduce the moving friction under the guidance of the moving beam guide plates, and the moving beam guide plates are connected to the longitudinal beam by bolts.

5. The multifunctional stand suitable for heating steel billets into a furnace and keeping them warm into and out of a furnace according to claim 1, characterized in that: The movable beam system comprises a movable beam body, a steel plate, a steel plate shaft, a steel plate limit block, a guide wheel group and a connecting support; The beam body is composed of two thick steel plates, and a rotation space for the steel shifting piece is reserved between the thick steel plates.

6. A multifunctional stand suitable for heating billets into a furnace and keeping them warm into and out of a furnace according to claim 5, characterized in that: The steel plate is in the form of a right triangle with its center of gravity at a lower position, and automatically keeps itself vertical under the action of gravity.

7. A multifunctional stand suitable for heating steel billets into a furnace and keeping them warm into and out of a furnace according to claim 1, characterized in that: The steel-moving driving device comprises a hydraulic cylinder, a rotating shaft, a driving crank, a bearing seat, a connecting crank and a connecting rod; When the hydraulic cylinder extends forward, the driving crank drives the rotating shaft to rotate in the bearing seat; the rotating shaft drives the connecting crank and drives the movable beam forward through the connecting rod; conversely, when the hydraulic cylinder retracts, the movable beam moves backward.

8. A method for using a multifunctional stand suitable for heating billets into a furnace and keeping them warm when entering and exiting a furnace, characterized in that: The method comprises the following steps: Load the hot billets from steelmaking directly into the heating furnace; the moving beam of the multifunctional stand for heating the billets into the furnace and keeping them warm in and out of the furnace is retracted to a non-working position, and the front end of the moving beam is located at the side edge of the front part of the 1st, 2nd, 3rd and 4th sections of the furnace roller table; when the hot billets from steelmaking are kept vertical, the multifunctional stand for heating the billets into the furnace and keeping them warm in and out of the furnace does not operate, and the hot billets directly enter the heating furnace through the 1st, 2nd, 3rd and 4th sections of the furnace roller table; when the hot billets from steelmaking are tilted at the 1st section of the front section of the furnace roller table, the moving beam 3 of the multifunctional stand for heating the billets into the furnace and keeping them warm in and out of the furnace moves slightly to push the billets back to the normal position. Ensure that the hot billets continue to directly enter the heating furnace through the 1st, 2nd, 3rd and 4th sections of the furnace roller table; The hot billets are loaded into the holding furnace and the heating furnace; wherein: the hot billets are pushed to the holding furnace billet assembly roller table through the furnace entry roller table; when the hot billets are loaded into the holding furnace, a pit entry and exit stand is used, and the hot billet group is hoisted from the holding furnace billet assembly roller table into the holding furnace by an unmanned vehicle; when the hot billets are taken out of the holding furnace, a pit entry and exit stand is used, and the hot billet group is hoisted from the holding furnace to the 3-section roller table of the heating furnace entry roller table by an unmanned vehicle; the hot billets enter the heating furnace through the 3-section roller table and 4-section roller of the furnace entry roller table; The off-line steel billet group is loaded into the heating furnace via the multifunctional stand; wherein: the crane lifts the off-line steel billet group to the static beam of the multifunctional stand for heating the steel billets into the furnace and keeping them warm when entering and exiting the furnace; the hydraulic cylinder of the steel-moving driving device of the multifunctional stand is pushed forward quickly, driving the moving beam to move forward; the steel billet group slides quickly on the track of the static beam; when the steel billet group reaches the small gap on the static beam, the hydraulic cylinder of the steel-moving driving device retracts; the hydraulic cylinder of the steel-moving driving device is pushed forward slowly, driving the moving beam to move the cross-sectional width of a single billet; the first billet of the steel billet group falls into the small gap on the static beam, thereby contacting the 1st roller at the front end of the furnace roller table, and the single steel billet enters the heating furnace from the 1st roller table, the 2nd roller table, the 3rd roller table and the 4th roller table of the furnace roller table.

9. The method for using the multifunctional stand suitable for heating billets into a furnace and keeping them warm in and out of a furnace according to claim 8, characterized in that: The hot blanks are loaded into the holding furnace and the heating furnace: the hot blanks are pushed to the holding furnace assembly roller via the furnace entry roller, and the method further comprises: The hot billets from steelmaking arrive at a roller table at the front end of the heating furnace inlet roller table one by one; the hydraulic cylinder of the steel-moving driving device of the multifunctional stand is pushed forward, driving the movable beam to move forward; the movable beam pushes the billets on the roller table of the first section forward to move toward the billet assembly roller table of the holding furnace; the hydraulic oil cylinder of the steel-moving driving device is retracted backward, driving the movable beam to move backward, and the steel-moving sheet on the movable beam is pressed by the billet; after the movable beam is retracted into place, the steel-moving sheet of the movable beam returns to vertical under the action of gravity; the above steps are repeated to make the billets a required number of sets.

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