A batch hot rolling system and method with vertical multi-channel preheating and reheating furnace

Abstract

This invention provides a batch hot rolling system and method with a vertical multi-channel preheating and reheating furnace; the system includes: a conveyor roller conveyor (1), a preheating furnace (2), an inlet reheating furnace (3), a hot rolling mill (4), an outlet reheating furnace (5), a cooling device (6), and an automatic loading and unloading device (7); in this invention, the material racks of the preheating furnace (2), the inlet reheating furnace (3), and the outlet reheating furnace (5) are lifted and lowered in the furnace body under the drive of the material rack lifting mechanism, and the material plates enter and exit the furnace body through the feeding mechanism, realizing the first-in-first-out principle when the material plates enter and exit the furnace body, which can ensure that the heating time of each material plate is the same during batch rolling. The material rack of the preheating furnace 2 involved in this invention has two storage stations arranged side by side in the horizontal direction, and the feeding mechanism of the preheating furnace 2 is also a dual-station structure, realizing the separate time-sharing storage and retrieval of two material plates in the first layer of the preheating furnace, realizing the uninterrupted rolling production of multiple batches of material plates, and improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the fields of steel rolling machinery and automation, and hot-rolled strip rolling technology; in particular, it relates to a batch hot rolling system and method with a vertical multi-channel preheating and reheating furnace. Background Technology

[0002] A batch hot rolling system with a vertical multi-channel preheating and reheating furnace is specifically designed for the hot rolling production of special alloy plates and strips.

[0003] The hot rolling production of special alloy plates and strips requires reheating after each rolling pass, and mass production must be achieved, with the preheating and reheating time and temperature of each piece in the same batch being exactly the same.

[0004] Traditional hot rolling production cannot meet the above requirements, and it is necessary to invent a batch hot rolling system with a vertical multi-channel preheating and reheating furnace. Summary of the Invention

[0005] The purpose of this invention is to provide a batch hot rolling system and method with a vertical multi-channel preheating and reheating furnace.

[0006] This invention is achieved through the following technical solution:

[0007] This invention relates to a batch hot rolling system with a vertical multi-channel preheating and reheating furnace, comprising: a material conveyor roller conveyor 1, a preheating furnace 2, an inlet reheating furnace 3, a hot rolling mill 4, an outlet reheating furnace 5, a cooling device 6, and an automatic loading and unloading device 7.

[0008] The material conveying roller conveyor 1 is arranged along the center line of the hot rolling mill on both sides of the inlet and outlet of the hot rolling mill 4;

[0009] The preheating furnace 2, the inlet reheating furnace 3, and the outlet reheating furnace 5 are respectively arranged on the side of the conveying roller conveyor 1; wherein, the preheating furnace 2 and the inlet reheating furnace 3 are respectively located on the inlet side of the hot rolling mill 4, and the outlet reheating furnace 5 is located on the outlet side of the hot rolling mill 4.

[0010] Cooling device 6 is arranged on the side of conveyor roller 1 and the exit side of hot rolling mill 4;

[0011] The automatic loading and unloading device 7 is arranged above the cooling device 6.

[0012] Preferably, the conveyor roller conveyor 1 is composed of several independently driven roller conveyor sections.

[0013] Preferably, the preheating furnace 2 is a vertical box furnace, including a preheating furnace body 8 and a first feeding mechanism 9;

[0014] The preheating furnace body 8 and the first feeding mechanism 9 are respectively arranged on both sides of the conveying roller conveyor 1; wherein, the preheating furnace body 8 is provided with a preheating furnace door 10 on the side closer to the conveying roller conveyor 1, and a preheating furnace material rack 11 is provided inside the preheating furnace body 8, with material plates placed in multiple layers along the height direction inside the material rack; a first material rack lifting mechanism 12 is provided on the side of the preheating furnace body 8 away from the conveying roller conveyor 1, and preheating furnace heating and temperature control devices 13 are arranged on all four sides of the interior of the preheating furnace body 8; the first feeding mechanism 9 includes: a first material support frame 14 and a first transmission mechanism 15.

[0015] Preferably, the inlet reheating furnace 3 and the outlet reheating furnace 5 have the same structure, both being vertical box furnaces, including: a reheating furnace body 16 and a second feeding mechanism 17;

[0016] The reheating furnace body 16 and the second feeding mechanism 17 are respectively arranged on both sides of the conveying roller conveyor 1;

[0017] The furnace body 16 of the reheating furnace is provided with a furnace door 18 on the side near the conveying roller 1. The furnace body 16 is provided with a reheating furnace material rack 19. The material plates are placed in multiple layers along the height direction in the material rack. The furnace body 16 of the reheating furnace is provided with a second material rack lifting mechanism 20 on the side away from the conveying roller 1. The furnace body 16 of the reheating furnace is provided with a reheating furnace heating and temperature control device 21 on all four sides. The second feeding mechanism 17 includes: a second material support frame 22 and a second transmission mechanism 23.

[0018] Preferably, the automatic loading and unloading device 7 includes: a suction cup robot 24 and a material transfer vehicle 25.

[0019] This invention also relates to a method for operating the aforementioned batch hot rolling system with vertical multi-channel preheating and reheating furnace, comprising the following steps:

[0020] Step 1: Use material transfer vehicle 25 to transport the batch of plates to be rolled to the automatic loading and unloading device 7;

[0021] Step 2: The suction cup robot 24 automatically places the first batch of material plates from the material transfer vehicle 25 onto the conveyor roller 1 at a certain rhythm and aligns them (N pieces of material plates per batch);

[0022] Step 3: The material conveyor roller conveyor 1 transports the material plates one by one to the waiting station at the preheating furnace 2 and then stops.

[0023] Step 4: The preheating furnace door 10 is opened, and the first material support frame 14 of the first feeding mechanism 9 picks up the batch of material plates one by one and feeds them into the first column of the material rack in the preheating furnace body 8. After the loading is completed, the preheating furnace door 10 is closed, and the preheating furnace 2 begins to preheat the material plates.

[0024] Step 5: In order to achieve continuous and uninterrupted production of multiple batches of material plates, repeat steps 2, 3, and 4 before the preheating of the first batch of material plates is completed, and send the second batch of N material plates into the second column of the material rack in the preheating furnace body 8.

[0025] Step 6: After the first batch of material plates is preheated, the furnace door 10 of the preheating furnace is opened, and the first material support frame 14 of the first material feeding mechanism 9 picks up the material plates one by one and takes them out of the furnace body 8 of the preheating furnace and places them on the conveying roller conveyor 1. The material plates are taken out of the furnace according to the first-in-first-out principle, that is, the material plates that enter the furnace first are taken out first.

[0026] Step 7: The material conveyor roller 1 feeds the material plate into the hot rolling mill for the first rolling pass. After rolling, the material conveyor roller 1 transports the material plate to the roller waiting station at the exit reheat furnace 5 and then stops.

[0027] Step 8: The furnace door 18 of the reheating furnace at the outlet is opened, and the second material support frame 22 of the second feeding mechanism 17 picks up the material plate and sends it into the furnace body 16 of the reheating furnace. After the loading is completed, the furnace door 18 of the reheating furnace at the outlet is closed, and the outlet reheating furnace 5 begins to reheat the material plate.

[0028] Step 9: During batch rolling, the next sheet can only be taken out of the preheating furnace 2 after the previous sheet has entered the reheating furnace;

[0029] Step 10: After the batch of material plates are reheated in the outlet reheating furnace 5, the furnace door 18 of the reheating furnace is opened, and the second material support frame 22 of the second material feeding mechanism 17 picks up the material plates one by one and takes them out of the reheating furnace body 16 and places them on the conveying roller 1. The material plates are taken out of the furnace according to the first-in-first-out principle, that is, the material plates that enter the furnace first are taken out first.

[0030] Step 11: The material conveyor roller 1 feeds the material plate into the hot rolling mill for the second rolling pass. After rolling, the material conveyor roller 1 transports the material plate to the roller waiting station at the entrance reheating furnace 3 and then stops.

[0031] Step 12: The furnace door 18 of the inlet reheating furnace 3 is opened, and the second material support frame 22 of the second feeding mechanism 17 picks up the material plate and sends it into the furnace body of the inlet reheating furnace 3. After the loading is completed, the furnace door 18 of the inlet reheating furnace 3 is closed, and the inlet reheating furnace 3 begins to reheat the material plate.

[0032] Step 13: Starting from the second pass, the material plate no longer enters the preheating furnace 2, but only flows between the inlet reheating furnace 3 and the outlet reheating furnace 5;

[0033] Step 14: Continue rolling according to the above operation. After an even number of rolling passes, until the rolled piece reaches the required size, the conveyor roller table 1 sends the first batch of rolled pieces into the cooling device 6 on the exit side of the hot rolling mill for cooling.

[0034] Step 15: The suction cup robot 24 automatically places the cooled first batch of material plates from the cooling device 6 into the material transfer vehicle 25 at a certain rhythm, and the rolling of the first batch of material plates is completed.

[0035] Step 16: Repeat step 5 to send the third batch of material plates into the first row of the material rack in the preheating furnace body 8 of the preheating furnace 2.

[0036] Step 17: Repeat steps 6-15 to continue rolling the second batch of plates. Repeat this process to achieve uninterrupted rolling production of N batches of plates.

[0037] The hot rolling system includes the following steps for the material plates to enter and exit the preheating furnace and the reheating furnace:

[0038] When the material plate enters the preheating furnace 2 and the reheating furnace (inlet reheating furnace 3, outlet reheating furnace 5), the material rack first stops at the feeding station (defined as station 0), the corresponding furnace door opens, and the material rack of the feeding mechanism picks up the first material plate from the conveying roller and sends it into the furnace body. The material plate is sent to the top of the first layer of the material rack (defined as the top layer of the material rack). The material rack then rises one station, and the material plate is lifted and stored in the first layer of the material rack. At this time, the material rack is at station 1, and the material rack of the feeding mechanism exits the furnace body. Similarly, the second material plate entering the furnace body is sent to the second layer, and the material rack rises to station 2. This process is repeated to complete the batch feeding operation of the material plates (N pieces). After the loading is completed, the material rack is at the heating station (i.e., station N), and the furnace door is closed.

[0039] When the material plates are removed from the preheating furnace 2 and the supplementary heating furnaces (inlet supplementary heating furnace 3 and outlet supplementary heating furnace 5), in order to ensure that the heating time of each material plate is the same, the first-in-first-out principle must be followed, that is, the first layer of material plates must be removed from the furnace first. The material rack needs to be lowered from the heating station (station N) to the discharge station (station 1). The furnace door is opened, and the material support frame of the feeding mechanism extends under the first layer of the material rack. The material rack then lowers one station (to station 0). The material plate is transferred from the first layer of the material rack to the support frame. The material support frame of the feeding mechanism exits the furnace body and places the material plate on the feeding roller conveyor. The material rack then rises two stations (to station 2). The material support frame of the feeding mechanism extends under the second layer of the material rack. The material rack then lowers one station (to station 1). This process is repeated to complete the batch removal operation of material plates (N pieces). After the Nth piece of material is removed, the material rack is located at station N-1, and the furnace door is closed.

[0040] Preferably, the preheating furnace material rack 11 is a vertical frame structure with N layers along its height and two rows arranged side-by-side along its horizontal direction. Each layer can simultaneously load two material plates, with a maximum capacity of 2N material plates. The first material rack lifting mechanism 12 is used for lifting and lowering the material rack and is installed on the outer side of the furnace body, away from the high-temperature area. Its transmission system adopts a motor + reducer + sprocket transmission method, and its positioning system adopts a triple positioning mode of mechanical positioning + fixed sensor + infrared sensor, which is safe and reliable.

[0041] The preheating furnace rack 11 is cast from heat-resistant steel (ZG40Cr28Ni48W5Si2), which effectively reduces high-temperature deformation. The reheating furnace rack 19 is a vertical frame structure with N layers along its height, each layer capable of loading one material plate simultaneously, up to a maximum of N material plates. The reheating furnace rack lifting mechanism 20 is used for lifting the rack and is installed on the outer side of the furnace body, away from the high-temperature area. Its transmission system uses a motor + reducer + sprocket transmission method, and its positioning system uses a triple positioning mode of mechanical positioning + fixed sensor + infrared sensor, which is safe and reliable. The rack is cast from heat-resistant steel (ZG40Cr28Ni48W5Si2), which effectively reduces high-temperature deformation.

[0042] Preferably, the first material rack lifting mechanism 12 is used for lifting and lowering the material rack.

[0043] Preferably, the reheating furnace material rack lifting mechanism 20 is used for lifting and lowering the material rack; the first material rack lifting mechanism 12 and the reheating furnace material rack lifting mechanism 20 are installed on the outer side of the furnace body, away from the high temperature area. Its transmission system adopts the transmission method of motor + reducer + sprocket, and its positioning system adopts the triple positioning mode of mechanical positioning + fixed sensor + infrared sensor, which is safe and reliable.

[0044] Preferably, the preheating furnace feeding mechanism 9 is a dual-station structure, with each station corresponding to one column in the material rack, used for the individual feeding of two material plates in the first layer of the preheating furnace material rack. The first transmission mechanism 15 is used for lifting and lowering the first material support frame 14 and for moving it forward and backward. Lifting is achieved by a servo motor driving the lifting machine, and moving it forward and backward is achieved by a cylinder.

[0045] The second feeding mechanism 17 is a single-station structure. The second transmission mechanism 23 can realize the lifting and moving forward and backward of the second material support frame 22. The lifting is achieved by a servo motor driving the lifting machine, and the moving forward and backward is achieved by a cylinder.

[0046] The preheating furnace body 8 and the reheating furnace body 16 are made of refractory material with a full fiber structure. The preheating furnace heating and temperature control device 13 and the reheating furnace heating and temperature control device 21 are arranged in 5 temperature zones along the height of the furnace body. Each zone is independently controlled, heated, and measured.

[0047] Compared with the prior art, this application provides a hot rolling system with two furnace doors at the inlet and outlet positions on the left and right sides of a preheating furnace. A preheating furnace drive roller conveyor is horizontally arranged inside the furnace body, with partition rings on the rollers dividing them into multiple rolling material channels. Multiple vertically installed preheating furnace lifting mechanisms are located at the bottom of the preheating furnace body to lift the rolling materials during heating, driven by cylinders, with the material arranged horizontally side-by-side inside the furnace. A reheating furnace has two furnace doors at the inlet and outlet positions on the left and right sides of the furnace body. A heating furnace lateral movement device is installed outside the bottom of the furnace body, driven by a motor to move the entire heating furnace horizontally. A preheating furnace drive roller conveyor is horizontally arranged inside the furnace body, with partition rings on the rollers dividing them into multiple rolling material channels. Multiple vertically installed preheating furnace lifting mechanisms are located at the bottom of the preheating furnace body to lift the rolling materials during heating, driven by cylinders, with the material arranged horizontally side-by-side inside the furnace. Although the loading and unloading of materials in the preheating furnace and the reheating furnace are achieved through in-furnace roller conveyors, these roller conveyors, installed inside the furnace, are prone to deformation under long-term use at high temperatures. The lifespan of the bearings is also significantly reduced at high temperatures, resulting in a high failure rate and inconvenient maintenance. Furthermore, the reheating furnace uses a furnace lateral movement device to connect a specific material channel with the rolling mill's working roller conveyor, enabling the loading, unloading, and rolling of specific materials. At high temperatures, frequent overall movement of the reheating furnace, including acceleration, deceleration, and vibration, increases the failure rate of heating elements, lifting mechanisms, and electrical components, reducing equipment reliability. Moreover, the horizontal arrangement of materials in the existing preheating and reheating furnaces already occupies a large workshop space; the overall lateral movement of the reheating furnace further increases this space requirement.

[0048] The preheating furnace and reheating furnace in this invention are both fixed, ensuring high equipment reliability. Materials are placed on a rack within the furnace body; this rack is integrally cast from a high-temperature resistant alloy material, preventing deformation even after prolonged use at high temperatures. The rack lifting device is installed outside the furnace body, cleverly avoiding the effects of high temperatures. The invention's ingenious structural design allows materials to enter and exit the furnace body via a feeding device, which is installed outside the furnace body, avoiding its susceptibility to high temperatures. The conveyor rollers are all located outside the heating furnace, away from high-temperature areas. The vertical placement of materials within the furnace body results in a smaller horizontal dimension, saving space. This invention significantly reduces failure rates, offers high reliability, ensures safety, and saves space.

[0049] The present invention has the following advantages:

[0050] (1) The present invention achieves preheating of batched plates and reheating after each rolling pass by arranging a preheating furnace 2 and an inlet reheating furnace 3 on the inlet side of the hot rolling mill 4 and an outlet reheating furnace 5 on the outlet side of the hot rolling mill 4.

[0051] (2) The preheating furnace 2, the inlet reheating furnace 3, and the outlet reheating furnace 5 involved in this invention are all vertical structures. The material rack inside the furnace is a vertical multi-layer frame structure. This structure is compact and occupies a small area. The furnace body is fixed during operation and does not need to be moved, which improves the equipment reliability of the preheating furnace and the reheating furnace and reduces the equipment failure rate.

[0052] (3) In this invention, the material racks of the preheating furnace 2, the inlet reheating furnace 3, and the outlet reheating furnace 5 can be raised and lowered in the furnace body under the drive of the material rack lifting mechanism. The material plates enter and exit the furnace body through the material feeding mechanism. This structure can realize the first-in-first-out principle when the material plates enter and exit the furnace body, and can ensure that the heating time of each material plate is the same during batch rolling.

[0053] (4) The preheating furnace 2 involved in this invention has two material storage stations arranged side by side in the horizontal direction. The feeding mechanism of the preheating furnace 2 is also a dual-station structure. This structure can realize the separate time-sharing storage and retrieval of two material plates in the first layer of the preheating furnace, thereby realizing the uninterrupted rolling production of multiple batches of material plates in this hot rolling system and improving production efficiency.

[0054] (5) The present invention realizes the automated operation of loading raw material plates and unloading finished product plates through the automatic loading and unloading device 7, thereby improving the automation level of the equipment. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the structure of the batch hot rolling system with vertical multi-channel preheating and reheating furnace involved in the present invention.

[0056] Figure 2 This is a schematic diagram of the side structure of the preheating furnace involved in this invention;

[0057] Figure 3 This is a schematic diagram of the side structure of the reheating furnace involved in this invention;

[0058] Figure 4 This is a schematic diagram of the cross-sectional structure of the preheating furnace involved in this invention;

[0059] Figure 5 This is a schematic cross-sectional view of the reheating furnace involved in this invention;

[0060] Figure 6 This is a schematic diagram showing the positions of each station of the preheating furnace and the supplementary heating furnace material rack involved in this invention;

[0061] Figure 7 This is an isometric view of the automatic loading and unloading device involved in this invention;

[0062] Reference numerals: 1 represents the material conveyor roller conveyor, 2 represents the preheating furnace, 3 represents the inlet reheating furnace, and 4 represents the hot rolling mill.

[0063] 5 is the outlet reheating furnace, 6 is the cooling device, 7 is the automatic loading and unloading device, 8 is the preheating furnace body, 9 is the first material feeding mechanism, 10 is the preheating furnace door, 11 is the preheating furnace material rack, 12 is the first material rack lifting mechanism, 13 is the preheating furnace heating and temperature control device, 14 is the first material support rack, and 15 is the first transmission mechanism.

[0064] 16 is the furnace body of the reheating furnace, 17 is the second material feeding mechanism, 18 is the furnace door of the reheating furnace, 19 is the material rack of the reheating furnace, 20 is the second material rack lifting mechanism, 21 is the heating and temperature control device of the reheating furnace, 22 is the second material support rack, 23 is the second transmission mechanism, 24 is the suction cup robot, and 25 is the material transfer vehicle. Detailed Implementation

[0065] The present invention will now be described in detail with reference to specific embodiments. It should be noted that the following embodiments are merely further illustrations of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.

[0066] Example

[0067] This embodiment describes a batch hot rolling system with a vertical multi-channel preheating and reheating furnace. (See...) Figure 1 As shown, it includes: a conveyor roller conveyor 1, a preheating furnace 2, an inlet reheating furnace 3, a hot rolling mill 4, an outlet reheating furnace 5, a cooling device 6, and an automatic loading and unloading device 7.

[0068] The conveyor roller conveyor 1 is arranged along the center line of the hot rolling mill on both sides of the inlet and outlet of the hot rolling mill 4; the preheating furnace 2, the inlet reheating furnace 3, and the outlet reheating furnace 5 are arranged on the side of the conveyor roller conveyor 1; wherein the preheating furnace 2 and the inlet reheating furnace 3 are located on the inlet side of the hot rolling mill 4, and the outlet reheating furnace 5 is located on the outlet side of the hot rolling mill 4.

[0069] Cooling device 6 is arranged on the side of conveyor roller 1 and the exit side of hot rolling mill 4;

[0070] The automatic loading and unloading device 7 is arranged above the cooling device 6.

[0071] The conveyor roller conveyor 1 is composed of several independently driven roller conveyor sections.

[0072] The preheating furnace 2 is a vertical box furnace, see Figure 2 and Figure 4 As shown, it includes a preheating furnace body 8 and a first feeding mechanism 9;

[0073] The preheating furnace body 8 and the first feeding mechanism 9 are respectively arranged on both sides of the conveying roller conveyor 1; wherein, the preheating furnace body 8 is provided with a preheating furnace door 10 on the side closer to the conveying roller conveyor 1, and a preheating furnace material rack 11 is provided inside the preheating furnace body 8, with material plates placed in multiple layers along the height direction inside the material rack; a first material rack lifting mechanism 12 is provided on the side of the preheating furnace body 8 away from the conveying roller conveyor 1, and preheating furnace heating and temperature control devices 13 are arranged on all four sides of the interior of the preheating furnace body 8; the first feeding mechanism 9 includes: a first material support frame 14 and a first transmission mechanism 15.

[0074] The inlet reheating furnace 3 and the outlet reheating furnace 5 have the same structure, see Figure 3 and Figure 5 As shown, they are all vertical box furnaces, including: a reheating furnace body 16 and a second feeding mechanism 17;

[0075] The reheating furnace body 16 and the second feeding mechanism 17 are respectively arranged on both sides of the conveying roller conveyor 1;

[0076] The furnace body 16 of the reheating furnace is provided with a furnace door 18 on the side near the conveying roller 1. The furnace body 16 is provided with a reheating furnace material rack 19. The material plates are placed in multiple layers along the height direction in the material rack. The furnace body 16 of the reheating furnace is provided with a second material rack lifting mechanism 20 on the side away from the conveying roller 1. The furnace body 16 of the reheating furnace is provided with a reheating furnace heating and temperature control device 21 on all four sides. The second feeding mechanism 17 includes: a second material support frame 22 and a second transmission mechanism 23.

[0077] The automatic loading and unloading device 7 is described in [reference]. Figure 7 As shown, it includes: suction cup robotic arm 24 and material transfer vehicle 25.

[0078] This embodiment also relates to the working method of the aforementioned batch hot rolling system with vertical multi-channel preheating and reheating furnace, including the following steps:

[0079] Step 1: Use material transfer vehicle 25 to transport the batch of plates to be rolled to the automatic loading and unloading device 7;

[0080] Step 2: The suction cup robot 24 automatically places the first batch of material plates from the material transfer vehicle 25 onto the conveyor roller 1 at a certain rhythm and aligns them (N pieces of material plates per batch);

[0081] Step 3: The material conveyor roller conveyor 1 transports the material plates one by one to the waiting station at the preheating furnace 2 and then stops.

[0082] Step 4: The preheating furnace door 10 is opened, and the first material support frame 14 of the first feeding mechanism 9 picks up the batch of material plates one by one and feeds them into the first column of the material rack in the preheating furnace body 8. After the loading is completed, the preheating furnace door 10 is closed, and the preheating furnace 2 begins to preheat the material plates.

[0083] Step 5: In order to achieve continuous and uninterrupted production of multiple batches of material plates, repeat steps 2, 3, and 4 before the preheating of the first batch of material plates is completed, and send the second batch of N material plates into the second column of the material rack in the preheating furnace body 8.

[0084] Step 6: After the first batch of material plates is preheated, the furnace door 10 of the preheating furnace is opened, and the first material support frame 14 of the first material feeding mechanism 9 picks up the material plates one by one and takes them out of the furnace body 8 of the preheating furnace and places them on the conveying roller conveyor 1. The material plates are taken out of the furnace according to the first-in-first-out principle, that is, the material plates that enter the furnace first are taken out first.

[0085] Step 7: The material conveyor roller 1 feeds the material plate into the hot rolling mill for the first rolling pass. After rolling, the material conveyor roller 1 transports the material plate to the roller waiting station at the exit reheat furnace 5 and then stops.

[0086] Step 8: The furnace door 18 of the reheating furnace at the outlet is opened, and the second material support frame 22 of the second feeding mechanism 17 picks up the material plate and sends it into the furnace body 16 of the reheating furnace. After the loading is completed, the furnace door 18 of the reheating furnace at the outlet is closed, and the outlet reheating furnace 5 begins to reheat the material plate.

[0087] Step 9: During batch rolling, the next sheet can only be taken out of the preheating furnace 2 after the previous sheet has entered the reheating furnace;

[0088] Step 10: After the batch of material plates are reheated in the outlet reheating furnace 5, the furnace door 18 of the reheating furnace is opened, and the second material support frame 22 of the second material feeding mechanism 17 picks up the material plates one by one and takes them out of the reheating furnace body 16 and places them on the conveying roller 1. The material plates are taken out of the furnace according to the first-in-first-out principle, that is, the material plates that enter the furnace first are taken out first.

[0089] Step 11: The material conveyor roller 1 feeds the material plate into the hot rolling mill for the second rolling pass. After rolling, the material conveyor roller 1 transports the material plate to the roller waiting station at the entrance reheating furnace 3 and then stops.

[0090] Step 12: The furnace door 18 of the inlet reheating furnace 3 is opened, and the second material support frame 22 of the second feeding mechanism 17 picks up the material plate and sends it into the furnace body of the inlet reheating furnace 3. After the loading is completed, the furnace door 18 of the inlet reheating furnace 3 is closed, and the inlet reheating furnace 3 begins to reheat the material plate.

[0091] Step 13: Starting from the second pass, the material plate no longer enters the preheating furnace 2, but only flows between the inlet reheating furnace 3 and the outlet reheating furnace 5;

[0092] Step 14: Continue rolling according to the above operation. After an even number of rolling passes, until the rolled piece reaches the required size, the conveyor roller table 1 sends the first batch of rolled pieces into the cooling device 6 on the exit side of the hot rolling mill for cooling.

[0093] Step 15: The suction cup robot 24 automatically places the cooled first batch of material plates from the cooling device 6 into the material transfer vehicle 25 at a certain rhythm, and the rolling of the first batch of material plates is completed.

[0094] Step 16: Repeat step 5 to send the third batch of material plates into the first row of the material rack in the preheating furnace body 8 of the preheating furnace 2.

[0095] Step 17: Repeat steps 6-15 to continue rolling the second batch of plates. Repeat this process to achieve uninterrupted rolling production of N batches of plates.

[0096] The hot rolling system's loading and unloading of the preheating furnace and reheating furnace includes the following steps, see... Figure 6 As shown:

[0097] When the material plate enters the preheating furnace 2 and the reheating furnace (inlet reheating furnace 3, outlet reheating furnace 5), the material rack first stops at the feeding station (defined as station 0), the corresponding furnace door opens, and the material rack of the feeding mechanism picks up the first material plate from the conveying roller and sends it into the furnace body. The material plate is sent to the top of the first layer of the material rack (defined as the top layer of the material rack). The material rack then rises one station, and the material plate is lifted and stored in the first layer of the material rack. At this time, the material rack is at station 1, and the material rack of the feeding mechanism exits the furnace body. Similarly, the second material plate entering the furnace body is sent to the second layer, and the material rack rises to station 2. This process is repeated to complete the batch feeding operation of the material plates (N pieces). After the loading is completed, the material rack is at the heating station (i.e., station N), and the furnace door is closed.

[0098] When the material plates are removed from the preheating furnace 2 and the supplementary heating furnaces (inlet supplementary heating furnace 3 and outlet supplementary heating furnace 5), in order to ensure that the heating time of each material plate is the same, the first-in-first-out principle must be followed, that is, the first layer of material plates must be removed from the furnace first. The material rack needs to be lowered from the heating station (station N) to the discharge station (station 1). The furnace door is opened, and the material support frame of the feeding mechanism extends under the first layer of the material rack. The material rack then lowers one station (to station 0). The material plate is transferred from the first layer of the material rack to the support frame. The material support frame of the feeding mechanism exits the furnace body and places the material plate on the feeding roller conveyor. The material rack then rises two stations (to station 2). The material support frame of the feeding mechanism extends under the second layer of the material rack. The material rack then lowers one station (to station 1). This process is repeated to complete the batch removal operation of material plates (N pieces). After the Nth piece of material is removed, the material rack is located at station N-1, and the furnace door is closed.

[0099] The preheating furnace material rack 11 is a vertical frame structure with N layers along the height direction and two columns arranged side by side along the horizontal direction. Each layer can ensure that two material plates are loaded at the same time, and a maximum of 2N material plates can be loaded.

[0100] The preheating furnace rack 11 is cast from heat-resistant steel (ZG40Cr28Ni48W5Si2), which effectively reduces high-temperature deformation. The reheating furnace rack 19 is a vertical frame structure with N layers along its height. Each layer can simultaneously load one material plate, and can hold a maximum of N material plates. The rack is also cast from heat-resistant steel (ZG40Cr28Ni48W5Si2), which effectively reduces high-temperature deformation.

[0101] The first material rack lifting mechanism 12 is used for lifting and lowering the material rack.

[0102] The reheating furnace material rack lifting mechanism 20 is used for lifting and lowering the material rack; the first material rack lifting mechanism 12 and the reheating furnace material rack lifting mechanism 20 are installed on the outer side of the furnace body, away from the high temperature area. Its transmission system adopts the transmission method of motor + reducer + sprocket, and its positioning system adopts the triple positioning mode of mechanical positioning + fixed sensor + infrared sensor, which is safe and reliable.

[0103] The preheating furnace feeding mechanism 9 is a dual-station structure, with each station corresponding to one column of the material rack. It is used for the individual feeding of two material plates in the first layer of the preheating furnace material rack. The first transmission mechanism 15 is used for the lifting and forward / backward movement of the first material support 14. The lifting is achieved by a servo motor driving the elevator, and the forward / backward movement is achieved by a cylinder. The second feeding mechanism 17 is a single-station structure. The second transmission mechanism 23 can realize the lifting and forward / backward movement of the second material support 22. The lifting is achieved by a servo motor driving the elevator, and the forward / backward movement is achieved by a cylinder. The preheating furnace body 8 and the reheating furnace body 16 are made of all-fiber refractory material. The preheating furnace heating and temperature control device 13 and the reheating furnace heating and temperature control device 21 are arranged in five temperature zones along the height direction inside the furnace body. Each zone is independently controlled, heated, and measured.

[0104] This invention achieves preheating of batch-produced plates and reheating after each rolling pass by arranging a preheating furnace 2 and an inlet reheating furnace 3 on the inlet side of the hot rolling mill 4, and an outlet reheating furnace 5 on the outlet side of the hot rolling mill 4. The preheating furnace 2, inlet reheating furnace 3, and outlet reheating furnace 5 involved in this invention are all vertical structures, and the material rack inside the furnace is a vertical multi-layer frame structure. This structure is compact, occupies a small area, and the furnace body is fixed during operation, improving the reliability of the preheating and reheating furnaces and reducing the equipment failure rate. In this invention, the material racks of the preheating furnace 2, inlet reheating furnace 3, and outlet reheating furnace 5 can be raised and lowered inside the furnace under the drive of the material rack lifting mechanism. The entry and exit of the plates into and out of the furnace is achieved through a feeding mechanism. This structure can realize the first-in, first-out principle when the plates enter and exit the furnace, ensuring that the heating time of each plate is the same during batch rolling. The preheating furnace 2 involved in this invention has two storage stations arranged side by side in the horizontal direction on its material rack. The feeding mechanism of the preheating furnace 2 is also a dual-station structure. This structure allows for the separate, time-sharing storage and retrieval of two material plates in one layer of the preheating furnace's material rack, thereby enabling uninterrupted rolling production of multiple batches of material plates in this hot rolling system and improving production efficiency. This invention also automates the loading of raw material plates and the unloading of finished product plates through the automatic loading and unloading device 7, improving the automation level of the equipment.

[0105] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A batch rolling hot rolling system with a vertical multi-pass preheating and reheat furnace, characterized in that, It comprises: a material conveying roller (1), a preheating furnace (2), an inlet heat supplementing furnace (3), a hot rolling machine (4), an outlet heat supplementing furnace (5), a cooling device (6), and an automatic loading and unloading device (7); the material conveying roller (1) is arranged on both sides of the inlet and outlet of the hot rolling machine (4) along the center line of the hot rolling machine group; the preheating furnace (2), the inlet heat supplementing furnace (3), and the outlet heat supplementing furnace (5) are arranged on the side of the material conveying roller (1); wherein the preheating furnace (2) and the inlet heat supplementing furnace (3) are respectively located on the inlet side of the hot rolling machine (4), and the outlet heat supplementing furnace (5) is located on the outlet side of the hot rolling machine (4); the cooling device (6) is arranged on the side of the material conveying roller (1) and the outlet side of the hot rolling machine (4); the automatic loading and unloading device (7) is arranged above the cooling device (6); the material conveying roller (1) is composed of several independently driven roller sections; the preheating furnace (2) is a vertical box-type furnace, comprising a preheating furnace body (8) and a first material taking mechanism (9); the preheating furnace body (8) and the first material taking mechanism (9) are respectively arranged on both sides of the material conveying roller (1); wherein the preheating furnace body (8) is provided with a preheating furnace door (10) on the side close to the material conveying roller (1), the preheating furnace body (8) is internally provided with a preheating furnace rack (11), and the material plates are placed in multiple layers in the rack along the height direction; the preheating furnace body (8) is provided with a first rack lifting mechanism (12) on the side away from the material conveying roller (1), and the preheating furnace body (8) is internally arranged with preheating furnace heating and temperature control devices (13) on four sides; the first material taking mechanism (9) comprises a first material supporting rack (14) and a first transmission mechanism (15); the inlet heat supplementing furnace (3) and the outlet heat supplementing furnace (5) are the same in structure, both being vertical box-type furnaces, comprising a heat supplementing furnace body (16) and a second material taking mechanism (17); the heat supplementing furnace body (16) and the second material taking mechanism (17) are respectively arranged on both sides of the material conveying roller (1); wherein the heat supplementing furnace body (16) is provided with a heat supplementing furnace door (18) on the side close to the material conveying roller (1), the heat supplementing furnace body (16) is internally provided with a heat supplementing furnace rack (19), and the material plates are placed in multiple layers in the rack along the height direction, the heat supplementing furnace body (16) is provided with a second rack lifting mechanism (20) on the side away from the material conveying roller (1), and the heat supplementing furnace body (16) is internally arranged with heat supplementing furnace heating and temperature control devices (21) on four sides; the second material taking mechanism (17) comprises a second material supporting rack (22) and a second transmission mechanism (23); the automatic loading and unloading device (7) comprises a suction cup manipulator (24) and a material transfer trolley (25); The working method of the batch rolling hot rolling system with the vertical multi-channel preheating and heat supplementing furnace comprises the following steps: Step 1: using the material transfer trolley (25) to transport the batch of material plates to be rolled to the automatic loading and unloading device (7); Step 2: the suction cup manipulator (24) automatically places the first batch of material plates from the material transfer trolley (25) onto the material conveying roller (1) at a certain rhythm and arranges them; Step 3: the material conveying roller (1) transports the material plates to the waiting station of the preheating furnace (2) block by block and stops; Step 4, the preheating furnace door (10) is opened, and the first material supporting frame (14) of the first material feeding mechanism (9) forks and sends the batch of material plates into the first column of the material supporting frame in the preheating furnace body (8), after the material loading is completed, the preheating furnace door (10) is closed, and the preheating furnace (2) starts to preheat the material plates; Step 5, in order to realize continuous and uninterrupted production of multiple batches of material plates, before the preheating of the first batch of material plates is completed, the steps (2), (3) and (4) are repeated, and the second batch of N material plates is sent into the second column of the material supporting frame in the preheating furnace body (8); Step 6, after the preheating of the first batch of material plates is completed, the preheating furnace door (10) is opened, and the first material supporting frame (14) of the first material feeding mechanism (9) forks and takes out the material plates from the preheating furnace body (8) and places them on the material conveying roller (1), and the material plates are taken out according to the first-in-first-out principle, that is, the material plates that are first put into the furnace are first taken out; Step 7, the material conveying roller (1) sends the material plates into the hot rolling mill (4) for first-pass rolling, and after rolling, the material conveying roller (1) stops after conveying the material plates to the roller waiting station at the outlet heat supplementing furnace (5); Step 8, the outlet heat supplementing furnace door (18) is opened, the second material supporting frame (22) of the second material feeding mechanism (17) forks and sends the material plates into the heat supplementing furnace body (16), after the material loading is completed, the outlet heat supplementing furnace door (18) is closed, and the outlet heat supplementing furnace (5) starts to supplement heat for the material plates; Step 9, when the batch of material plates is rolled, only after the last material plate enters the outlet heat supplementing furnace (5), the next material plate can be taken out from the preheating furnace (2); Step 10, after the heat supplementing of the batch of material plates in the outlet heat supplementing furnace (5) is completed, the heat supplementing furnace door (18) is opened, the second material supporting frame (22) of the second material feeding mechanism (17) forks and takes out the material plates from the heat supplementing furnace body (16) and places them on the material conveying roller (1), and the material plates are taken out according to the first-in-first-out principle, that is, the material plates that are first put into the furnace are first taken out; Step 11, the material conveying roller (1) sends the material plates into the hot rolling mill (4) for second-pass rolling, and after rolling, the material conveying roller (1) stops after conveying the material plates to the roller waiting station at the inlet heat supplementing furnace (3); Step 12, the heat supplementing furnace door (18) of the inlet heat supplementing furnace (3) is opened, the second material supporting frame (22) of the second material feeding mechanism (17) forks and sends the material plates into the furnace body of the inlet heat supplementing furnace (3), after the material loading is completed, the heat supplementing furnace door (18) of the inlet heat supplementing furnace (3) is closed, and the inlet heat supplementing furnace (3) starts to supplement heat for the material plates; Step 13, from the second pass, the material plates no longer enter the preheating furnace (2), but only circulate between the inlet heat supplementing furnace (3) and the outlet heat supplementing furnace (5); Step 14, according to the above operation, continue to roll, after an even number of passes of rolling, until the rolled piece reaches the required size, the material conveying roller (1) sends the first batch of rolled pieces into the cooling device (6) on the outlet side of the hot rolling mill for cooling; Step 15, the suction cup mechanical hand (24) automatically places the first batch of cooled material plates from the cooling device (6) to the material transfer trolley (25) according to a certain rhythm, and the rolling of the first batch of material plates is completed. Step 16, repeat the operation of step 5, the third batch of material plate into the preheating furnace (2) preheating furnace body (8) in the first column of the rack; Step 17, repeat the operation of steps 6-15, continue the rolling of the second batch of material plate, and so on, so as to realize the uninterrupted rolling production of N batches of material plate; The process of the preheating furnace (2), the inlet heat supplement furnace (3) and the outlet heat supplement furnace (5) comprises the following steps: When the material plate enters the preheating furnace (2), the inlet heat supplement furnace (3) and the outlet heat supplement furnace (5), the rack first stops at the feeding station, and the corresponding furnace door is opened. The first material plate is lifted from the material feeding roller (1) by the material taking mechanism and is sent into the furnace body. The material plate is sent to the first layer of the rack, and the rack is immediately raised to the next station. The material plate is lifted and stored on the first layer of the rack. At this time, the rack is located at the 1st station, and the material taking mechanism is withdrawn from the furnace body. The second material plate entering the furnace body is sent to the second layer, and the rack is raised to the 2nd station. In this way, the batch feeding operation is sequentially completed, and after the feeding is completed, the rack is located at the heating station, and the furnace door is closed. When the material plate is taken out from the preheating furnace (2), the inlet heat supplement furnace (3) and the outlet heat supplement furnace (5), the first layer of material plate is taken out first, the rack is lowered from the heating station to the discharging station, the corresponding furnace door is opened, the first material plate is taken out from the first layer of the rack by the material taking mechanism, and the material taking mechanism is withdrawn from the furnace body. The material plate is placed on the material feeding roller (1), and the rack is immediately raised to the next station. The material taking mechanism is inserted into the second layer of the rack, and the rack is immediately lowered to the next station. The batch feeding operation is completed, and after the Nth material is taken out, the rack is located at the N-1st station, and the corresponding furnace door is closed. The preheating furnace rack (11) is a vertical frame structure, which has N layers in the height direction and is divided into two columns in the horizontal direction. Each layer can load two material plates at the same time, and at most 2N material plates can be loaded. The first rack lifting mechanism (12) is used for lifting drive of the rack and is installed on the outer side of the furnace body, away from the high temperature area. The heat supplement furnace rack (19) is a vertical frame structure, which has N layers in the height direction and can load one material plate at the same time. The second rack lifting mechanism (20) is used for lifting drive of the rack and is integrally installed on the outer side of the furnace body, away from the high temperature area. The preheating furnace material taking mechanism (9) is a double-station structure, each station corresponds to one column of the rack, and is used for taking and feeding two material plates in one layer of the preheating furnace rack. The first driving mechanism (15) is used for lifting and advancing and retreating of the first material rack (14). The lifting is realized by a servo motor driven elevator, and the advancing and retreating is realized by a cylinder.

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