A device for on-line heat preservation and conveying of continuous casting billets

Abstract

The application discloses a device for continuous casting billet online heat preservation and conveying, which comprises a heat preservation cover, a flip plate assembly layer, a hopper and a mounting groove arranged on a foundation along a billet conveying direction, the heat preservation cover is arranged on the mounting groove, the flip plate assembly layer is arranged in the mounting groove, a billet conveying line passes through a heat preservation space formed between the heat preservation cover and the flip plate assembly layer in the mounting groove along a longitudinal direction, and the hopper is arranged in the mounting groove below the flip plate assembly layer; the flip plate assembly layer comprises a plurality of flip plates arranged in the mounting groove in sequence along the billet conveying direction, one end of the flip plate is connected with a side wall of the mounting groove of the foundation through a hinge shaft, and a large-tension spring is connected between the flip plate and the side wall of the mounting groove of the foundation. The device realizes heat preservation and conveying of the billet, avoids convection between the billet and the outside world, delays temperature drop in the conveying process of the billet, reduces heat energy loss, lowers energy consumption, and is simple in overall system structure, convenient to install, low in price and high in applicability.

Description

A device for online heat preservation and conveying of continuously cast billets Technical Field

[0001] This invention specifically relates to a device for online heat preservation and conveying of continuously cast billets. Background Technology

[0002] With increasingly stringent energy conservation and environmental protection requirements in the steel industry, more and more advanced processes and technologies are being applied. Hot charging and hot conveying of slabs refers to the direct transfer of slabs from the continuous casting machine to the hot rolling mill for rolling. This process effectively reduces temperature loss after the slab leaves the line, making it a low-energy-consumption process that significantly reduces slab inventory and unnecessary slab heating energy consumption. It has become a technology that major steel mills are continuously promoting. However, in conventional hot charging and hot conveying processes, the slabs are transported from the continuous casting machine to the hot rolling furnace via roller conveyors in an open state without insulation. This results in a significant temperature drop during the slab process, increasing unnecessary heat loss. Therefore, there is an urgent need to develop an online insulation and conveying device and method for continuously cast slabs to reduce temperature drop during slab transport. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a device for online heat preservation and conveying of slabs in continuous casting, which addresses the above-mentioned defects in the existing technology. This device realizes heat preservation and conveying of slabs, avoids convection between slabs and the outside environment, slows down the temperature drop during the slab conveying process, reduces heat loss, and lowers energy consumption. The overall system has a simple structure, is easy to install, is inexpensive, and has strong applicability.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A device for online heat preservation and conveying of continuous casting billets includes a heat preservation cover, a flip plate assembly layer, a hopper, and an installation groove disposed on the foundation along the billet conveying direction. The heat preservation cover is placed on the installation groove, the flip plate assembly layer is disposed in the installation groove, the billet conveying line passes longitudinally through the heat preservation space formed between the heat preservation cover and the flip plate assembly layer in the installation groove, and the hopper is disposed in the installation groove below the flip plate assembly layer.

[0006] The flap assembly layer includes multiple flaps arranged sequentially along the slab conveying direction in the mounting groove. One end of the flap is connected to the side wall of the mounting groove of the foundation through a hinge shaft, and a high-tension spring is connected between the flap and the side wall of the mounting groove of the foundation.

[0007] According to the above technical solution, the cross-section of the mounting groove is wedge-shaped, forming a wedge-shaped groove.

[0008] According to the above technical solution, the number of hoppers is the same as the number of flaps, and they are arranged one-to-one below the corresponding flaps. Each hopper is equipped with a lifting lug.

[0009] According to the above technical solution, each flap is connected to the inner side wall of the mounting groove by a telescopic device. The telescopic device is equipped with a displacement sensor, and the flap is equipped with a weighing sensor. When the weighing sensor detects that the item on the flap has reached the specified weight, the telescopic device drives the flap to rotate downward around the hinge axis, pouring the item into the hopper below. The high tension spring causes the emptied flap to rotate back to the initial position.

[0010] According to the above technical solution, the slab conveying line is a slab roller conveyor, the gap between two adjacent rollers is a roller gap, and a flap is arranged below each roller gap of the slab roller conveyor inside the heat insulation cover. A guide plate is arranged above the gap between two adjacent flaps. The guide plate is arranged below the corresponding roller of the slab roller conveyor and guides the iron slag material sliding down the roller to the flap.

[0011] According to the above technical solution, sealing plates are provided at both ends of the installation groove. The height of the sealing plates is lower than the conveying surface of the slab conveying line. The sealing plates, together with each flap, provide a certain degree of heat preservation and sealing to the installation groove below the slab conveying line.

[0012] According to the above technical solution, flexible curtains are provided at both the inlet and outlet ends of the insulation cover. The upper end of the flexible curtains is connected to the upper edge of the inlet and outlet of the insulation cover, and the lower end can extend to the sealing plate of the mounting groove. Refractory material is laid on the inner wall of the insulation cover. Photoelectric switches are provided at the inlet and outlet ends of the insulation cover. Temperature sensors are installed inside the insulation cover and are fixed on the insulation cover, located close to the inlet and outlet ends. A hanging plate is provided at the upper end of the insulation cover.

[0013] According to the above technical solution, a support is provided on one side of the heat insulation cover, the support is fixed on the foundation, the heat insulation cover is hinged to the support, and a tilting device is connected between the foundation and the heat insulation cover.

[0014] According to the above technical solution, a rotating shaft is connected to the side wall of the heat insulation cover. One end of the rotating shaft and the bracket are respectively provided with a positioning sleeve and an installation sleeve. The positioning sleeve and the installation sleeve are sleeved together. The other end of the rotating shaft is connected to the side wall of the heat insulation cover.

[0015] According to the above technical solution, a sealing platform is provided on the foundation. The sealing platform is arranged on both sides of the top opening of the installation groove. The roller conveyor of the slab conveyor line is arranged on the sealing platform in sequence, and each roller conveyor is connected to the transmission system of the slab conveyor line.

[0016] The movable end of the flap is equipped with a flexible seal. When the flap is flipped to the initial horizontal position, it connects and contacts the side wall of the mounting groove through the flexible seal, thereby ensuring the sealing of the mounting groove.

[0017] A flexible high-temperature seal is provided between the two sides of the insulation cover and the two sides of the mounting groove.

[0018] The present invention has the following beneficial effects:

[0019] 1. This invention achieves heat preservation and conveying of slabs, avoids convection between the slabs and the outside environment, slows down the temperature drop during the slab conveying process, reduces heat loss, lowers energy consumption, and the overall system has a simple structure, is easy to install, is inexpensive, and has strong applicability.

[0020] 2. Multiple flaps and two sealing plates, along with flexible seals on the flaps, achieve a complete seal in the area below the roller conveyor, preventing convection between the lower surface of the slab and the outside environment and slowing down temperature drop during slab transport. High-tension springs overcome the weight of the flaps, reducing the load on the telescopic device. A hinge structure design, combined with the telescopic device's extension and retraction, enables automatic tilting of the iron oxide scale on the flaps. Weighing sensors on the flaps allow for real-time measurement of the iron oxide scale amount, and algorithm design enables automatic calculation of the iron oxide scale weight in the hopper. A bracket, rotating shaft, and positioning sleeve ensure precise positioning of the insulation cover, while the tilting device allows for its rotation, meeting equipment replacement and inspection needs. Photoelectric switches and temperature sensors on the insulation cover enable real-time online evaluation of its insulation effect and equipment fault diagnosis. Flexible curtains on both ends of the insulation cover ensure both a flexible seal inside the cover before the slab passes through and normal slab transport, significantly reducing temperature drop during transport. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the device for online heat preservation and conveying of continuous casting billets in an embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view AA of Figure 1;

[0023] Figure 3 is a view from direction B in Figure 1;

[0024] In the diagram, 1-sealing plate, 2-flexible curtain, 3-support, 4-rotating shaft, 5-positioning sleeve, 6-installation sleeve, 7-insulation cover, 8-temperature sensor, 9-slab, 10-tilting device, 11-hanging plate, 12-roller conveyor, 13-transmission system, 14-photoelectric switch, 15-flexible high-temperature seal, 16-hopper, 17-lifting lug, 18-high tension spring, 19-telescopic device, 20-displacement sensor, 21-flip plate, 22-guide plate, 23-weighing sensor, 24-refractory material, 25-foundation, 26-flexible seal, 27-sealing platform. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Referring to Figures 1 and 2, an embodiment 1 of the present invention provides a device for online heat preservation and conveying of continuously cast billets, which includes an installation groove, a heat preservation cover 7, a flip-plate assembly layer, and a hopper 16 disposed on a foundation 25 along the billet conveying direction. The heat preservation cover 7 covers the installation groove, the flip-plate assembly layer is disposed in the installation groove, the billet conveying line is installed on the top of the installation groove, and the billet conveying line passes longitudinally through the heat preservation space formed between the heat preservation cover 7 and the flip-plate assembly in the installation groove. The hopper 16 is disposed in the installation groove below the flip-plate assembly layer.

[0027] Furthermore, the cross-section of the mounting groove is wedge-shaped, forming a wedge-shaped groove; the inclined surface of the wedge-shaped groove serves as the mounting surface for the telescopic device 19 and the high-tension spring 18, and the bottom of the wedge-shaped groove is used to place the hopper 16.

[0028] Example 2

[0029] As shown in Figure 1, based on Embodiment 1, the flip panel component layer is further limited, and Embodiment 2 with the limited layer has better performance.

[0030] Furthermore, the flap assembly layer includes multiple flaps 21 arranged sequentially along the conveying direction of the slab 9 in the mounting groove of the foundation 25. One end of the flap 21 is hinged to the side wall of the mounting groove of the foundation 25 via a hinge shaft. A high-tension spring 18 connects the flap 21 and the side wall of the mounting groove of the foundation 25. When the flap 21 receives a certain weight of dust and iron oxide scale that falls off the slab 9 during movement, the flap 21 can rotate and tilt around the hinge shaft to pour the dust and iron oxide scale on it into the hopper 16 below. The high-tension spring 18 causes the emptied flap 21 to rotate back to the initial position, where the flap 21 is arranged horizontally.

[0031] Furthermore, each flap 21 is connected to the wedge-shaped surface of the inner side wall of the mounting groove by a telescopic device 19. The telescopic device 19 is equipped with a displacement sensor 20, and the flap 21 is equipped with a weighing sensor 23. When the weighing sensor 23 detects that the item held on the flap 21 has reached the specified weight, the telescopic device 19 drives the flap 21 to flip downward around the hinge axis, pouring the held item into the hopper 16 below. The high tension spring 18 causes the emptied flap 21 to rotate back to the initial position.

[0032] The hinge shaft and the high-tension spring 18 are arranged on the same side of the mounting slot.

[0033] Furthermore, the slab conveying line is a slab roller conveyor, and the gap between two adjacent rollers 12 is a roller gap. Below each roller gap of the slab roller conveyor inside the insulation cover 7, a flap 21 is arranged accordingly. Above the gap between two adjacent flaps 21, a guide plate 22 is arranged accordingly. The guide plate 22 is arranged directly below the corresponding roller 12 of the slab roller conveyor. The guide plate 22 guides the iron slag material sliding down the roller 12 onto the flap 21.

[0034] The number of hoppers 16 is the same as the number of flaps 21, and they are arranged one-to-one below the corresponding flaps 21. Each hopper 16 is equipped with a lifting lug 17.

[0035] Furthermore, the number of flaps 21 corresponds one-to-one with the number of roll gaps. The top surface of the flap 21 is concave and the bottom surface is planar. The guide plate 22 is triangular, with an isosceles triangle being the optimal choice. Through the triangular guide plate 22 and the flap 21 with a concave upper surface, the automatic collection of iron oxide scale on the slab is achieved.

[0036] Furthermore, sealing plates 1 are provided at both ends of the installation groove. The height of the sealing plates 1 is lower than the conveying surface of the slab conveying line. The sealing plates 1 and each flap 21 together provide a certain degree of heat preservation and sealing to the installation groove below the slab conveying line.

[0037] Furthermore, a guide plate is laterally connected to the inner side of the sealing plate 1. The guide plate is arranged below the outermost roller 12 of the corresponding slab conveyor and is set above the adjacent outermost flap 21 to fill the gap between the sealing plate 1 and the flap 21, and to guide the iron slag falling from the outermost roller 12 onto the corresponding flap 21.

[0038] The guide plate is a right-angled triangle.

[0039] Example 3

[0040] As shown in Figure 1, the insulation cover 7 is further modified based on Examples 1 and 2, resulting in Example 3 having even better performance.

[0041] Flexible curtains 2 are provided at the inlet and outlet ends of the heat insulation cover 7. The upper end of the flexible curtains 2 is connected to the upper edge of the inlet and outlet of the heat insulation cover 7, and the lower end can extend to the sealing plate 1 of the mounting groove. Refractory material 24 is laid on the inner wall of the heat insulation cover 7. Photoelectric switches 14 are provided at the inlet and outlet ends of the heat insulation cover 7. Temperature sensors 8 are provided inside the heat insulation cover 7. Temperature sensors 8 are fixed on the heat insulation cover 7 and arranged close to the inlet and outlet ends of the heat insulation cover 7.

[0042] Furthermore, the insulation cover 7 is composed of multiple insulation unit covers spliced ​​together sequentially along the slab conveying direction, and each insulation unit cover is equipped with a flexible curtain 2 at both the inlet and outlet.

[0043] Furthermore, a support 3 is provided on one side of the heat insulation cover 7. The support 3 is fixed on the foundation 25. The heat insulation cover 7 is hinged to the support 3. A tilting device 10 is connected between the foundation 25 and the side wall of the heat insulation cover 7. The tilting device 10 and the support 3 are arranged on the same side of the heat insulation cover 7.

[0044] Furthermore, the tilting device 10 is a telescopic cylinder, which can be one of a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

[0045] Furthermore, a rotating shaft 4 is connected to the side wall of the heat insulation cover 7. One end of the rotating shaft 4 and the bracket 3 are respectively provided with a positioning sleeve 5 and an installation sleeve 6. The positioning sleeve 5 and the installation sleeve 6 are sleeved together. The other end of the rotating shaft 4 is connected to the side wall of the heat insulation cover 7.

[0046] Furthermore, a sealing platform 27 is provided on the foundation 25. The sealing platform 27 is arranged on both sides of the top opening of the mounting groove. The roller conveyor 12 of the slab conveyor line is arranged sequentially on the sealing platform 27. Each roller conveyor 12 is connected to the transmission system 13 of the slab conveyor line.

[0047] The movable end of the flap 21 is provided with a flexible seal 26. When the flap 21 is flipped to the initial horizontal position, it is connected and contacted with the side wall of the mounting groove through the flexible seal 26, thereby ensuring the sealing of the mounting groove.

[0048] Flexible high-temperature seals 15 are provided on the mating surfaces between the two sides of the heat insulation cover 7 and the two sides of the mounting groove.

[0049] The working principle of this invention: The foundation 25 serves as the installation base for the entire system. Looking at the cross-section of the slab conveying section, there is a wedge-shaped groove in the middle, inside which are installed devices such as a sealing plate 1, hoppers 16, a high-tension spring 18, a telescopic device 19, and a flap 21. Multiple hoppers 16 are designed in the wedge-shaped groove of the foundation 25 along the conveying direction of the slab 9, mainly used to collect dust and iron oxide scale that falls off the slab 9 during movement. Each hopper 16 is equipped with a lifting lug 17, mainly used to lift the hopper 16, thereby recycling and reusing the iron oxide scale and dust in the hopper 16. Multiple flaps 21 are designed in the wedge-shaped groove of the foundation 25 along the conveying direction of the slab 9. The top of the flap 21 has a concave structure, mainly for... The iron oxide scale accumulates towards the center, with a planar structure below. Multiple flaps 21 are connected to form a sealing surface within the wedge-shaped groove of the roller conveyor base 25. Each flap 21 has a hinge on one side for tilting. To further improve the sealing between the flap 21 and the wedge-shaped groove of the base 25, a flexible seal 26 is designed on the other side. A weighing sensor 23 is located in the middle of the flap 21 to monitor the weight of the iron oxide scale in real time. Sealing plates 1 are designed at both ends of the wedge-shaped groove of the base 25 (both ends of the roller conveyor area), thus achieving a complete seal between the sealing plates 1 and the flaps 21. Below each flap 21... The hopper 21 is equipped with a high-tension spring 18 and a telescopic device 19. Under normal conditions, the high-tension spring 18 is in a compressed state to counteract the weight of the flap 21, and the telescopic device 19 is in an extended state. When the amount of iron oxide scale on the flap 21 reaches a certain value, the telescopic device 19 is retracted, and the flap 21 flips down around the hinge shaft to collect the iron oxide scale into the hopper 16. Each telescopic device 19 is equipped with a displacement sensor 20, which can measure and monitor the actual extension stroke of the telescopic device 19 in real time. Multiple roller conveyors 12 are installed on the foundation 25 along the billet conveying direction. Each roller conveyor 12 is equipped with a transmission system 13 for conveying the billet 9 on the roller conveyor 12. A transmission system 13 is designed below each roller conveyor 12. There is a guide plate 22, which has a triangular structure. Its main function is to facilitate the iron oxide scale on the slab 9 to fall along the wedge-shaped surface into the middle of the flip plate 21. Multiple insulation systems are designed along the conveying direction of the roller conveyor 12. Each insulation system includes a flexible curtain 2, a positioning sleeve 5, an installation sleeve 6, an insulation cover 7, a temperature sensor 8, a tilting device 10, a hanging plate 11, a photoelectric switch 14, a flexible high-temperature seal 15, and refractory material 24. The outer shell of the insulation system is a metal insulation cover 7, and the inside of the insulation cover 7 is refractory material 24, which is mainly used to prevent the high temperature of the slab from spreading to the outside of the insulation cover 7. Each insulation cover 7 has an inverted trapezoidal hanging plate 11 on the top, which is mainly used to realize the overall hoisting and disassembly of the insulation cover 7.Each insulation cover 7 is equipped with flexible curtains 2 at both ends. These curtains 2 can be multi-layered chains arranged in a staggered pattern, or they can be a single, high-strength high-temperature asbestos structure. The key feature is that the flexible curtains 2 are non-rigid structures. This ensures that the insulation cover 7 is placed vertically before the slab 9 arrives, creating a sealed area inside, while also allowing the flexible curtains 2 to deform during slab transport without affecting the normal transport of the slab. Each insulation cover 7 is also equipped with mounting sleeves 6 on both sides. Additionally, a support 3 and a positioning sleeve 5 are designed on the foundation 25. When the mounting sleeves 6 and positioning sleeves 5 on the insulation cover 7 are coaxial, inserting the rotating shaft 4 into the mounting sleeves 6 and positioning sleeves 5 achieves the installation and positioning of the insulation cover 7. Furthermore, since a tilting device 10 is designed on the foundation 25, with its other end connected to the insulation cover 7, the entire insulation cover 7 can rotate along the rotating shaft 4 by extending and retracting the tilting device 10, satisfying the requirements of the roller conveyor 12. This also addresses the inspection and maintenance needs of equipment such as the high-tension spring 18, telescopic device 19, and flip plate 21 within the wedge-shaped groove of the foundation 25. Simultaneously, to improve the sealing between the insulation cover 7 and the foundation 25, rigid sealing platforms 27 are designed along the conveying direction of the slab 9 on the foundation 25, employing a staggered sealing method, where the outer side of the insulation cover 7 contacts the inner side of the sealing platform 27. A flexible high-temperature seal 15 is designed below the insulation cover 7, ensuring good sealing between the sealing platform 27 and the insulation cover 7, while also meeting the tilting requirements of the insulation cover 7. A photoelectric switch 14 is designed on the first and last protective covers 7 in the slab roller conveyor area, with a small hole in the corresponding area of ​​the insulation cover 7. The time of slab entry and exit from the insulation cover 7 is automatically recorded through signal blocking. Temperature sensors 8 are designed on the top of the insulation cover 7 directly above the measuring line of the photoelectric switch 14, primarily used for real-time measurement of the temperature of the slab 9 on the roller conveyor 12.

[0050] The working process of the online heat preservation and conveying device for continuous casting billets:

[0051] Step 1: In the initial state, the tilting device 10 is not activated, the heat insulation cover 7 and the flexible curtain 2 are both in a vertical state, the telescopic device 19 is extended, the large tension spring 18 is compressed, and the flip plate 21 is in a horizontal position. Thus, the entire roller conveyor area is in a relatively sealed area. The photoelectric switch 14, displacement sensor 20, and weighing sensor 23 are all in the energized working state. The system records the initial measurement value of the displacement sensor 20 on the telescopic device 19 as L1, and the real-time recorded value of the weighing sensor 23 as S1. The weight of the iron oxide scale in the hopper 16 is recorded as K.

[0052] Step 2: When the photoelectric switch 14 at the entrance of the roller conveyor area is blocked, after the "blocking" signal arrives, the temperature sensor 8 located directly above the measuring line of the photoelectric switch 14 is activated, and the initial temperature of the slab c1 is recorded. At the same time, the time when the slab 9 enters the heat preservation area is recorded as t1. After the "blocking" signal of the photoelectric switch 14 at the entrance of the roller conveyor area disappears, proceed to step 3.

[0053] Step 3: When the photoelectric switch 14 at the exit of the roller conveyor area is blocked, after the "blocking" signal arrives, the temperature sensor 8 located directly above the measuring line of the exit photoelectric switch 14 is activated, recording the temperature of the slab c2 at this time, and simultaneously recording the time when the slab 9 exits the insulation area as t2; if (c1-c2) / (t2-t1)>a (a is the set value of the average temperature drop of the slab 9 per unit time throughout the year, the value of a ranges from 1-50℃ / min, which can be selected according to user needs, where it is 0.9a in summer and 1.1a in winter;), the system automatically alarms and displays "Insulation cover malfunction, temperature drop is too large". After manual confirmation, the system returns to normal; when the "blocking" signal of the photoelectric switch 14 at the exit of the roller conveyor area disappears, proceed to step 4;

[0054] Step 4: When the real-time recorded value of the weighing sensor 23 is S1≥p (p is the maximum allowable load of iron oxide scale and dust on the flap 21, generally taken as 30kg-100kg), the telescopic device 19 retracts to its shortest length, and the actual measured value of the displacement sensor 20 is recorded as L2, controlled according to the following requirements:

[0055] ① If (L1-L2)≥0.8L (L is the maximum allowable extension of the telescopic device 19), the telescopic device 19 will return to its initial extended state after 30 seconds. The real-time recorded value of the weighing sensor 23 will be recorded as S2, and the weight of the iron oxide scale in the hopper 16 will be recorded as K=K+(S1-S2). The value of K will be stored in an overwrite manner. If K≥0.8w (w is the maximum allowable loading capacity of the hopper 16), the system will alarm "The hopper is full, please hoist and clean it in time". After manual confirmation, the system will return to normal and proceed to step 5.

[0056] ② If (L1-L2) < 0.8L, the system alarm will display "Extension device jammed, please confirm manually". After manual confirmation, the system will return to normal and proceed to step 5.

[0057] When the real-time recorded value of the weighing sensor 23 is S1 < p, proceed to step 5;

[0058] Step 5: If a "maintenance" command is received, the temperature sensor 8 and photoelectric switch 14 are de-energized and stop working, the tilting device 10 retracts to its minimum position, and the insulation cover 7 rotates around the rotating shaft 4 to open; otherwise, proceed to step 6. If a "maintenance completed" command is received, the tilting device 10 extends to its initial position, so that the insulation cover 7 is in a vertical state, the temperature sensor 8 and photoelectric switch 14 are energized and work normally, and proceed to step 6.

[0059] Step 6: The system ends and proceeds to step 1.

[0060] This invention patent develops a device and method for online heat preservation and conveying of continuously cast billets. The overall system has a simple structure, is easy to install, inexpensive, and highly applicable. Through a triangular guide plate and a flap structure with a concave upper surface, automatic collection of iron oxide scale on the billet is achieved. Multiple flaps, two front and rear sealing plates, and flexible seals 26 on the flaps ensure a complete seal in the area below the roller conveyor, preventing convection between the lower surface of the billet and the outside environment and slowing down temperature drop during billet conveying. A high-tension spring overcomes the self-weight of the flaps, reducing the load on the telescopic device. Simultaneously, a hinge shaft structure design and the extension and retraction of the telescopic device enable automatic tilting of the iron oxide scale on the flaps. By installing a weighing sensor on the flip plate, the amount of iron oxide scale on the flip plate can be measured in real time, and the weight of iron oxide scale in the hopper can be automatically calculated through algorithm design. The support, rotating shaft 4 and positioning sleeve can achieve precise positioning of the insulation cover. At the same time, the insulation cover can be flipped under the action of the tilting device to meet the needs of equipment replacement and inspection. By adding photoelectric switches and temperature sensors to the insulation cover, the insulation effect of the insulation cover can be evaluated online in real time and the equipment fault can be determined. The flexible curtains on the left and right ends of the insulation cover can ensure the flexible sealing of the internal area of ​​the insulation cover before the slab passes through, and also ensure the normal transportation of the slab, which greatly reduces the temperature drop during the transportation of the slab.

[0061] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A device for online heat preservation and conveying of continuously cast billets, characterized in that, The system includes an installation groove, an insulation cover (7), a flip-plate assembly layer, and a hopper, all installed on the foundation along the slab conveying direction. The insulation cover is placed over the installation groove, and the flip-plate assembly layer is placed inside the installation groove. The slab conveying line passes longitudinally through the insulation space formed between the insulation cover and the flip-plate assembly in the installation groove. The hopper is placed in the installation groove below the flip-plate assembly layer. The flip-plate assembly layer includes multiple flip-plates (21) arranged sequentially in the installation groove of the foundation along the conveying direction of the slab (9). One end of each flip-plate is connected to the side wall of the installation groove of the foundation via a hinge shaft. A high-tension spring (18) connects the flip-plate to the side wall of the installation groove of the foundation. Each flip-plate is connected to the inner side wall of the installation groove via a telescopic device (19), and a displacement sensor (20) is provided on the telescopic device. The flip plate is equipped with a weighing sensor (23). When the weighing sensor (23) detects that the item on the flip plate has reached the specified weight, the telescopic device drives the flip plate to flip downward around the hinge axis, pouring the item into the hopper below. The high tension spring (18) makes the emptied flip plate return to the initial position. The slab conveying line is a slab roller conveyor. The gap between two adjacent rollers is the roller gap. A flip plate is arranged below each roller gap of the slab roller conveyor in the heat insulation cover. A guide plate (22) is arranged above the gap between two adjacent flip plates. The guide plate is arranged below the corresponding roller of the slab roller conveyor. The guide plate guides the iron scrap material that slides off the roller to the flip plate. Flexible springs are provided at both the inlet and outlet of the heat insulation cover. The upper end of the flexible curtain (2) is connected to the upper edge of the inlet and outlet of the heat insulation cover, and the lower end can extend to the sealing plate of the mounting groove. The inner wall of the heat insulation cover is covered with refractory material (24). The inlet and outlet ends of the heat insulation cover are equipped with photoelectric switches (14). The heat insulation cover is equipped with a temperature sensor (8). The temperature sensor is fixed on the heat insulation cover and arranged close to the inlet and outlet ends of the heat insulation cover. A bracket is provided on one side of the heat insulation cover. The bracket is fixed on the foundation. The heat insulation cover is hinged to the bracket. A tilting device (10) is connected between the foundation and the heat insulation cover. The working process of the device for online heat preservation and conveying of continuous casting billets is as follows: Step 1, in the initial state, the tilting device is not started, the heat insulation cover and the flexible curtain are both in a vertical state, and the telescopic device is activated. When the extension is extended, the high-tension spring is compressed, the flap is in a horizontal position, and the entire roller conveyor area is in a relatively sealed space; the photoelectric switch, displacement sensor, and weighing sensor are all in the energized working state; the system records the initial measurement value of the displacement sensor on the telescopic device as L1, and the real-time recorded value of the weighing sensor as S1; the weight of the iron oxide scale in the hopper is recorded as K; Step 2, when the photoelectric switch at the entrance of the roller conveyor area is blocked, after the "blocking" signal arrives, the temperature sensor located directly above the photoelectric switch measurement line is activated, and the initial temperature of the slab is recorded as c1. At the same time, the time when the slab enters the heat preservation area is recorded as t1. When the "blocking" signal of the photoelectric switch at the entrance of the roller conveyor area disappears, proceed to step 3;Step 3: When the photoelectric switch at the exit of the roller conveyor area is blocked, the temperature sensor located directly above the measuring line of the exit photoelectric switch is activated after the "blocking" signal is received. It records the temperature of the slab at this time as c2, and at the same time, records the time when the slab leaves the heat preservation area as t2. If (c1-c2) / (t2-t1)>a, where a is the set value of the average temperature drop of the slab per unit time throughout the year, the system will automatically alarm to indicate that the temperature drop is too large. After manual confirmation, the system will return to normal. When the "blocking" signal of the photoelectric switch at the exit of the roller conveyor area disappears, proceed to step 4. Step 4: When the real-time recorded value of the weighing sensor is S1≥p, where p is the maximum allowable load of iron oxide scale and dust on the flap, the telescopic device retracts to its shortest length, and the actual measured value of the displacement sensor is recorded as L2. Control is performed as follows: Step 1): If (L1-L2)≥0.8L, where L is the maximum allowable telescopic amount, the telescopic device returns to its initial extended state, and the real-time recorded value of the weighing sensor is recorded as S2. The weight of the iron oxide scale in the hopper is recorded as K=K+(S1-S2), and the K value is stored in an overwrite manner. If K≥0.8w, where w is the maximum allowable loading capacity of the hopper, the system alarms that the hopper is full. After manual confirmation, the system resumes operation. If (L1-L2) < 0.8L, the system alarms and indicates that the telescopic device is stuck. After manual confirmation, the system returns to normal and proceeds to step 5. When the real-time recorded value of the weighing sensor is S1 < p, proceed to step 5. In step 5, if a "maintenance" command is received, the temperature sensor and photoelectric switch are de-energized and stop working, the tilting device retracts to the minimum position, and the insulation cover rotates around the rotation axis to open. Otherwise, proceed to step 6. If a "maintenance completed" command is received, the tilting device extends to the initial position, making the insulation cover vertical. The temperature sensor and photoelectric switch are energized and work normally, and proceed to step 6. In step 6, re-enter step 1.

2. The device for online heat preservation and conveying of continuously cast billets according to claim 1, characterized in that, The cross-section of the mounting groove is wedge-shaped, forming a wedge-shaped groove.

3. The device for online heat preservation and conveying of continuously cast billets according to claim 1, characterized in that, The number of hoppers (16) is the same as the number of flaps, and they are arranged one-to-one below the corresponding flaps. Each hopper is equipped with a lifting lug (17).

4. The device for online heat preservation and conveying of continuously cast billets according to claim 3, characterized in that, Sealing plates (1) are provided at both ends of the mounting groove. The height of the sealing plates is lower than the conveying surface of the slab conveying line. The sealing plates and each flip plate together insulate and seal the mounting groove below the slab conveying line.

5. The device for online heat preservation and conveying of continuously cast billets according to claim 1, characterized in that, The side wall of the heat insulation cover is connected to a rotating shaft. One end of the rotating shaft and the bracket are respectively provided with a positioning sleeve (5) and an installation sleeve (6). The positioning sleeve (5) and the installation sleeve (6) are sleeved together. The other end of the rotating shaft is connected to the side wall of the heat insulation cover. The upper end of the heat insulation cover is provided with a hanging plate (11).

6. The device for online heat preservation and conveying of continuously cast billets according to claim 1, characterized in that, A sealing platform (27) is provided on the foundation. The sealing platform (27) is arranged on both sides of the top opening of the installation groove. The rollers of the slab conveying line are arranged on the sealing platform (27) in sequence. Each roller is connected to the transmission system of the slab conveying line. The movable end of the flip plate is provided with a flexible seal (26). When the flip plate flips to the initial horizontal position, it is connected to the side wall of the installation groove through the flexible seal, thereby ensuring the sealing of the installation groove. A flexible high temperature seal (15) is provided between the two sides of the heat insulation cover and the two sides of the installation groove.

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