Rapid cooling device for continuous casting sheet billet

Abstract

A continuous casting slab rapid cooling device comprises a spraying device, a blowing device and a temperature measuring device, the spraying device comprises a plurality of spraying pipes arranged above and below a conveying roller way, each spraying pipe is communicated with a plurality of sprayers, the water inlet ends of the spraying pipes are communicated with the same main water pipe in parallel, and the water inlet ends of the spraying pipes are communicated with the same main water pipe in parallel. The spraying device is externally connected with a cold water pipeline through the water inlet end of a main water pipe, the blowing device comprises a ventilation pipeline which is arranged on one side of the conveying roller way and communicated with a plurality of high-pressure air nozzles, the blowing device is externally connected with a high-pressure inflation device through the inlet end of the ventilation pipeline, and the temperature measuring device comprises a front temperature measuring instrument and a rear temperature measuring instrument which are arranged at the front end and the rear end of the conveying roller way respectively. The spraying device, the blowing device and the temperature measuring device are all associated with the control system and work in cooperation with one another under the action of the control system. According to the utility model, the cooling temperature of the steel billet can be accurately controlled, the working efficiency is improved, the energy waste is reduced, and the quality of the casting billet is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steelmaking-continuous casting, and in particular relates to a device capable of rapidly cooling a continuous casting slab. Background Art

[0002] When the continuous casting slab is cut on the cutting roller and enters the conveying roller between the continuous casting machine and the rolling mill, the temperature is about 850°C. If the slab is directly sent to the hot rolling process at this time, cracks are likely to appear on its surface during the heating process in the heating furnace, affecting subsequent processing and manufacturing. In addition, during steelmaking, in order to improve the performance of steel, different trace alloying elements are added to the steel according to different steel types. Steel billets containing microalloying elements such as Nb, V, and Ti are particularly prone to cracks. The hot crack sensitive temperature ranges corresponding to different microalloying elements are different. However, the existing spraying device not only cannot accurately control the cooling temperature according to the different steel types of the ingot, but also the sprayed cooling water cannot be evenly sprayed on the surface of the ingot, resulting in uneven cooling of the ingot surface. Finally, the surface of the ingot is not flat and smooth. The cooling water sprayed on the surface of the ingot will accumulate locally due to free flow, resulting in uneven cooling of the ingot surface, hot charging cracks in the hot rolling stage, and further affecting its subsequent processing and manufacturing. Utility Model Content

[0003] The utility model aims to provide a rapid cooling device which can accurately control the cooling temperature and uniformly cool the surface of the ingot, so as to solve the technical problems that the existing spraying device cannot accurately control the cooling temperature according to the needs of the ingot and causes uneven cooling of the surface of the ingot.

[0004] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] A rapid cooling device for a continuous casting slab comprises a spray device, a purge device and a temperature measuring device, wherein the spray device comprises a plurality of spray pipes arranged above and below a conveying roller, each spray pipe is connected to a plurality of nozzles, water inlet ends of the plurality of spray pipes are connected in parallel to the same main water pipe, the spray device is externally connected to a cold water pipe through the water inlet end of the main water pipe, the purge device comprises a ventilation pipe arranged on one side of the conveying roller and connected to a plurality of high-pressure air nozzles, the purge device is externally connected to a high-pressure inflation device through the inlet end of the ventilation pipe, the temperature measuring device comprises a front temperature measuring instrument and a rear temperature measuring instrument respectively arranged at the front and rear ends of the conveying roller, the spray device, the purge device and the temperature measuring device are all associated with a control system, and the three cooperate with each other under the action of the control system.

[0006] Furthermore, the spray pipe of the spray device includes an upper spray pipe arranged above the conveying roller and a lower spray pipe arranged below the conveying roller, and a plurality of corresponding spray branch pipes are respectively connected to the upper spray pipe and the lower spray pipe, wherein the plurality of parallel spray branch pipes connected to the water outlet end of the upper spray pipe are the upper spray branch pipes, and the plurality of upper spray branch pipes are evenly distributed above the ingot conveying roller, the plurality of parallel spray branch pipes connected to the water outlet end of the lower spray pipe are the lower spray branch pipes, and the plurality of lower spray branch pipes are evenly distributed below the ingot conveying roller, the nozzles are connected to the spray branch pipes, and a plurality of corresponding nozzles are evenly distributed on each spray branch pipe.

[0007] Furthermore, each spray branch pipe is parallel to the running direction of the casting, and the nozzles on two adjacent spray branch pipes are arranged alternately, among which the one connected to the bottom surface of the upper spray branch pipe and facing downward is the upper nozzle, and the one connected to the top surface of the lower spray branch pipe and facing upward is the lower nozzle.

[0008] Furthermore, the ventilation duct is arranged parallel to the running direction of the ingot, and a plurality of high-pressure gas nozzles are evenly distributed on the ventilation duct, and the high-pressure gas nozzles are all facing the conveying roller.

[0009] Furthermore, the control system includes a main control valve, an upper control valve, a lower control valve and a high-pressure gas valve associated with the main control box, wherein the main control valve is arranged on the main water pipe, the upper control valve and the lower control valve are respectively arranged at the water inlet ends of the upper spray pipe and the lower spray pipe, the high-pressure gas valve is arranged at the inlet end of the ventilation pipe, the main control box and the front temperature measuring instrument and the rear temperature measuring instrument of the temperature measuring device are also mutually associated, a corresponding power device is provided on one side of the conveyor roller, and the main control box is associated with the power device of the conveyor roller.

[0010] Furthermore, the master control box includes a display screen and control buttons corresponding to each other. The display screen is arranged in the upper middle part of the master control box, and a plurality of control buttons are evenly distributed in a matrix manner below the display screen.

[0011] Furthermore, a filter is provided at the upper water outlet end of the main water pipe of the spray device.

[0012] Furthermore, the conveyor roller is composed of a plurality of rollers arranged in parallel with their two ends connected to corresponding support plates, the support plates provide support for them, the spray device is fixed to the support plate through a spray pipe under the conveyor roller, the purge device is fixed to the support plate on one side of the conveyor roller through a ventilation duct, and the front and rear temperature measuring devices are respectively fixed at corresponding positions of the support plates at the front and rear ends of the conveyor roller.

[0013] The utility model discloses a continuous casting slab rapid cooling device to accurately control the cooling temperature of different batches of steel slabs, thereby improving the efficiency of cooling the slabs, reducing the waste of energy, making the surface of the slabs cool faster and cooling more evenly, making the surface of the slabs after cooling less likely to crack, and improving the quality of the slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the rapid cooling device for continuous casting slabs of the utility model;

[0015] Explanation of the markings in the figure: 1. Upper spray pipe; 11. Upper spray branch pipe; 12. Upper nozzle; 13. Upper control valve; 2. Lower spray pipe; 21. Lower spray branch pipe; 22. Lower nozzle; 23. Lower control valve; 3. Main water pipe; 31. Main control valve; 4. Ventilation pipe; 41. High-pressure gas nozzle; 42. High-pressure gas valve; 5. Front temperature meter; 51. Rear temperature meter; 6. Main control box; 61. Display screen; 62. Control button; 7. Filter; 8. Power unit; 9. Conveyor roller; 91. Support plate. DETAILED DESCRIPTION

[0016] In order to better understand the purpose, structure and function of the utility model, the utility model is further described in detail below with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the utility model continuous casting slab rapid cooling device includes a spray device, a purge device and a temperature measuring device, wherein the spray device is arranged above and below the billet conveying roller 9, the conveying roller 9 is composed of a plurality of rollers arranged in parallel, the two ends of the rollers are connected to the corresponding support plate 91, and the support plate 91 provides support for it, the lower part of the spray device is fixed on the support plate 91, the purge device is arranged on one side of the conveying roller 9, and the temperature measuring device is arranged at the front and rear ends of the conveying roller 9, the spray device, the purge device and the temperature measuring device cooperate with each other, and are all associated with the control system, under the control of the control system, when the billet reaches the corresponding position on the conveying roller 9, the spray device sprays it to cool it, in this process, the purge device evenly spreads the cooling water sprayed on the surface of the billet, accelerates the cooling of the billet, and makes the cooling more uniform, the temperature measuring device keeps real-time monitoring of the temperature of the billet to ensure its accurate cooling, after the billet temperature drops to the set temperature, the control system releases the billet on the conveying roller 9 to enter the next link.

[0018] The spray device includes a plurality of spray pipes arranged above and below the casting conveying roller 9. The spray device is fixed to the support plate 91 through the spray pipes below the conveying roller 9. The spray pipes include an upper spray pipe 1 arranged above the conveying roller 9 and a lower spray pipe 2 arranged below the conveying roller 9. The upper spray pipe 1 and the lower spray pipe 2 are respectively connected to corresponding spray branches, wherein the upper spray pipe 1 is connected to a plurality of upper spray branches 11, and the plurality of upper spray branches 11 are connected in parallel to the outlet of the upper spray pipe 1. The water end is uniformly distributed above the billet conveying roller 9, and the lower spray pipe 2 is connected to multiple lower spray branch pipes 21, and multiple lower spray branch pipes 21 are connected in parallel to the water outlet end of the lower spray pipe 2 and are uniformly distributed below the billet conveying roller 9. In this embodiment, two spray branch pipes are respectively provided on the upper spray pipe 1 and the lower spray pipe 2, and each spray branch pipe is parallel to the running direction of the billet, and a nozzle is provided on the spray branch pipe, and each spray branch pipe is uniformly distributed with multiple nozzles, and the nozzles on the two adjacent spray branches are The upper spray branch pipe 11 is arranged in a staggered manner, wherein the spray head arranged on the upper spray branch pipe 11 is the upper spray head 12, which is connected to the bottom surface of the upper spray branch pipe 11, and the spray direction of the water flow is downward. The upper spray head 12 sprays cold water downward from the top of the conveyor roller 9 to the ingot on the conveyor roller 9, and the spray head arranged on the lower spray branch pipe 21 is the lower spray head 22, which is connected to the top surface of the lower spray branch pipe 21, and the spray direction of the water flow is upward. The lower spray head 22 sprays cold water downward from the bottom of the conveyor roller 9. The upper part is for spraying cold water on the ingot on the conveying roller 9. The water inlet ends of the upper spray pipe 1 and the lower spray pipe 2 are connected to the same main water pipe 3. The water inlet ends of the two are connected in parallel to the water outlet end of the main water pipe 3. The cooling device is connected to an external cold water pipeline through the main water pipe 3. The cold water flows into the upper spray pipe 1 and the lower spray pipe 2 through the main water pipe 3, and then reaches the nozzle through the corresponding spray branch pipe, and finally is sprayed on the ingot on the conveying roller 9 from the corresponding direction by the corresponding nozzle, thereby achieving the purpose of cooling the ingot.

[0019] The purging device includes an air duct 4 arranged on one side of the conveyor roller 9. The air duct 4 is arranged parallel to the running direction of the ingot and is fixed on the support plate 91 on the corresponding side. A plurality of high-pressure gas nozzles 41 are evenly distributed on the air duct 4. The high-pressure gas nozzles 41 are all facing the direction of the ingot above the conveyor roller 9. The inlet end of the air duct 4 is externally connected to a high-pressure inflation device. When in use, high-pressure air passes through the air duct 4 to reach the high-pressure gas nozzle 41, and is sprayed onto the ingot on the conveyor roller 9 by the high-pressure nozzle, thereby evenly spreading the cooling water on the surface of the ingot, making its cooling more evenly distributed, and preventing it from accumulating locally, causing uneven cooling of the surface of the ingot, and further affecting its subsequent processing.

[0020] The temperature measuring device includes a front thermometer 5 and a rear thermometer 51, wherein the front thermometer 5 is arranged at the front end of the conveyor roller 9 in the feeding direction, and the rear thermometer 51 is arranged at the rear end of the conveyor roller 9 in the discharging direction. The front thermometer 5 and the rear thermometer 51 are respectively fixed at the corresponding positions of the support plates 91 at the front and rear ends of the conveyor roller 9, and the front thermometer 5 and the rear thermometer 51 are both associated with the control system. The two monitor the temperature and position of the ingot on the conveyor roller 9 in real time at the front and rear ends, and transmit the monitored data to the control device in real time. The control system controls each component to cool down or release the ingot according to the temperature data transmitted.

[0021] The control system includes a main control valve 31, an upper control valve 13, a lower control valve 23, a high-pressure gas valve 42 and a master control box 6, wherein the main control valve 31 is arranged on the main water pipe 3, and the cold water flow in the spray device can be generally controlled by the main control valve 31. Separate control valves are respectively arranged at the water inlet ends of the upper spray pipe 1 and the lower spray pipe 2, which are the upper control valve 13 arranged on the upper spray pipe 1 and the lower control valve 23 arranged on the lower spray pipe 2. The upper control valve 13 can be used to separately adjust the upper spray pipe 1 and the lower spray pipe 2. The cooling water spraying amount of the shower pipe 1 can be adjusted by the lower control valve 23 to separately control the cooling water spraying amount of the lower shower pipe 2, thereby realizing the separate control of the upper shower pipe 1 and the lower shower pipe 2. A high-pressure air valve 42 is provided at the inlet end of the ventilation pipe 4. The high-pressure air valve 42 can control the amount of high-pressure air entering the ventilation pipe 4, thereby controlling the blowing amount of the purge device. The main control valve 31, the upper control valve 13, the lower control valve 23 and the high-pressure air valve 42 are all associated with the main control box 6. The control box 6 is associated with the front temperature measuring instrument 5 and the rear temperature measuring instrument 51 of the temperature measuring device. The main control box 6 controls the flow rate of cold water in the spraying device through the main control valve 31, the upper control valve 13 and the lower control valve 23 according to the temperature of the ingot on the conveying roller 9 transmitted in real time by the front temperature measuring instrument 5 and the rear temperature measuring instrument 51, and then sprays the ingot with cold water accordingly. At the same time, the filling amount of compressed air in the purge device is controlled by the high-pressure air valve 42, and then the cold water sprayed on the ingot is blown accordingly to make it evenly spread. Finally, a corresponding power device 8 for providing power for it is provided on one side of the conveying roller 9. The main control box 6 is associated with the power device 8 of the conveying roller 9. When the temperature of the ingot on the conveying roller 9 monitored in real time by the temperature measuring device reaches the set temperature, the corresponding signal is transmitted to the main control box 6. While controlling the spraying device and the purge device to stop working, the main control box 6 will also control the power device 8 of the conveying roller 9 to work and transport the ingot to the next link.

[0022] The main control box 6 includes a display screen 61 and control buttons 62, which work in conjunction with each other. The display screen 61 is arranged in the upper middle portion of the main control box 6, and a plurality of control buttons 62 are evenly distributed in a matrix pattern below the display screen 61. The display screen 61 can display the current operating status and fault information of the equipment in real time. The cooperation between the two can also be used to set system operating parameters, view historical records and related data statistics, etc., and the corresponding control buttons 62 are associated with the corresponding devices, and the start and stop of each device can also be directly controlled through the corresponding control buttons 62.

[0023] A filter 7 is provided on the main water pipe 3 of the spraying device. The filter 7 is arranged at the water outlet end of the main water pipe 3. The water in the main water pipe 3 flows into each spraying pipe after being filtered by the filter 7. The filtered water molecules are cleaner, which prevents other trace elements and impurities in the water molecules from being too high and affecting the quality of the ingot during spraying.

[0024] When in use, firstly input corresponding operation parameters into the control system through the main control box 6 according to the different steel types of the current batch of ingots, then start the cooling device, the ingot enters the conveyor roller 9 from the front end of the conveyor roller 9, when its temperature measuring device detects that it has reached the set position, its position and corresponding temperature information are transmitted to the control system, under the control of the control system, the conveyor roller 9 stops conveying, and the ingot pauses at the corresponding position on the conveyor roller 9, at the same time, the spraying device and the purge device start to work together, according to the temperature information transmitted by the temperature measuring device, the control system controls the upper spray pipe 1 and the lower spray pipe 2 through the upper control valve 13 and the lower control valve 23 to spray cold water on the upper and lower surfaces of the ingot to a corresponding degree, in this process, the control system controls the upper spray pipe 1 and the lower spray pipe 2 through the high-pressure air valve 42 The purge device is controlled to spray cold water on the ingot to prevent water accumulation on the surface of the ingot. During this process, the temperature measuring device monitors the temperature of the ingot in real time. The control system makes real-time and flexible adjustments to the cold water spraying size of the upper spray pipe 1 and the lower spray pipe 2 through the upper control valve 13 and the lower control valve 23 according to the preset operating parameters and the real-time temperature information fed back by the temperature measuring device. When the temperature measuring device detects that the temperature on the ingot has reached the required temperature set by the system, the control system receives the corresponding temperature information, controls the corresponding spraying device and purge device to stop working through the main control valve 31 and the high-pressure air valve 42, and at the same time, enables the conveyor roller 9 to continue working through the power device 8 of the conveyor roller 9, thereby running the cooled ingot to the next process.

[0025] The utility model discloses a rapid cooling device for continuous casting slabs, which can input different operation parameters into the control system according to steel types with different microalloy element contents and different required cooling ranges, so as to accurately control the cooling temperature of the corresponding casting slabs, thereby not only improving the efficiency of cooling the casting slabs and reducing the energy waste in the process, but also using the rapid cooling device for continuous casting slabs can make the surface of the casting slabs cool down faster and cool more evenly during the cooling process of the casting slabs, so that the quality of the casting slabs is not affected by the cooling, the surface of the casting slabs will not crack due to poor cooling, and the quality of the casting slabs after cooling is higher.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A continuous casting slab rapid cooling device, characterized in that: The invention comprises a spraying device, a purging device and a temperature measuring device, wherein the spraying device comprises a plurality of spraying pipes arranged above and below the conveying roller (9), each spraying pipe is connected to a plurality of spray heads, the water inlet ends of the plurality of spraying pipes are connected in parallel to the same main water pipe (3), the spraying device is connected to a cold water pipe through the water inlet end of the main water pipe (3), the purging device comprises a ventilation pipe (4) arranged on one side of the conveying roller (9) and connected to a plurality of high-pressure air nozzles (41), the purging device is connected to a high-pressure inflation device through the inlet end of the ventilation pipe (4), the temperature measuring device comprises a front temperature measuring instrument (5) and a rear temperature measuring instrument (51) respectively arranged at the front and rear ends of the conveying roller (9), the spraying device, the purging device and the temperature measuring device are all associated with a control system, and the three work in coordination with each other under the action of the control system.

2. The continuous casting slab rapid cooling device according to claim 1, characterized in that: The spray pipe of the spray device comprises an upper spray pipe (1) arranged above the conveying roller (9) and a lower spray pipe (2) arranged below the conveying roller (9), and a plurality of corresponding spray branch pipes are respectively connected to the upper spray pipe (1) and the lower spray pipe (2), wherein the plurality of parallel spray branch pipes connected to the water outlet end of the upper spray pipe (1) are upper spray branch pipes (11), and the plurality of upper spray branch pipes (11) are evenly distributed above the ingot conveying roller (9); the plurality of parallel spray branch pipes connected to the water outlet end of the lower spray pipe (2) are lower spray branch pipes (21), and the plurality of lower spray branch pipes (21) are evenly distributed below the ingot conveying roller (9); the spray heads are connected to the spray branch pipes, and a plurality of corresponding spray heads are evenly distributed on each spray branch pipe.

3. The continuous casting slab rapid cooling device according to claim 2, characterized in that: Each spray branch pipe is parallel to the running direction of the casting billet, and the nozzles on two adjacent spray branch pipes are arranged in a staggered manner, wherein the nozzle connected to the bottom surface of the upper spray branch pipe (11) and facing downward is the upper nozzle (12), and the nozzle connected to the top surface of the lower spray branch pipe (21) and facing upward is the lower nozzle (22).

4. The continuous casting slab rapid cooling device according to claim 2, characterized in that: The control system comprises a main control valve (31), an upper control valve (13), a lower control valve (23) and a high-pressure gas valve (42) associated with a main control box (6), wherein the main control valve (31) is arranged on the main water pipe (3), the upper control valve (13) and the lower control valve (23) are arranged at the water inlet ends of the upper spray pipe (1) and the lower spray pipe (2), respectively, and the high-pressure gas valve (42) is arranged at the inlet end of the ventilation pipe (4). The main control box (6) is also associated with a front temperature measuring instrument (5) and a rear temperature measuring instrument (51) of a temperature measuring device. A corresponding power device (8) is arranged on one side of a conveying roller (9), and the main control box (6) is associated with the power device (8) of the conveying roller (9).

5. The continuous casting slab rapid cooling device according to claim 4, characterized in that: The master control box (6) comprises a display screen (61) and control buttons (62) corresponding to each other, the display screen (61) being arranged in the upper middle portion of the master control box (6), and a plurality of control buttons (62) being evenly distributed in a matrix manner below the display screen (61).

6. The continuous casting slab rapid cooling device according to claim 2, characterized in that: A filter (7) is provided at the upper water outlet end of the main water pipe (3) of the spraying device.

7. The continuous casting slab rapid cooling device according to claim 1, characterized in that: The ventilation duct (4) is arranged parallel to the running direction of the casting slab, and a plurality of high-pressure gas nozzles (41) are evenly distributed on the ventilation duct (4), and the high-pressure gas nozzles (41) are all facing the conveying roller (9).

8. The continuous casting slab rapid cooling device according to claim 1, characterized in that: The conveying roller (9) is composed of a plurality of rollers connected at both ends to corresponding support plates (91) arranged in parallel, the support plates (91) providing support for the rollers, the spray device is fixed to the support plate (91) through a spray pipe below the conveying roller (9), the purge device is fixed to the support plate (91) on one side of the conveying roller (9) through a ventilation pipe (4), and the front temperature measuring device (5) and the rear temperature measuring device (51) are respectively fixed to corresponding positions of the support plates (91) at the front and rear ends of the conveying roller (9).

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