On-line high-temperature continuous casting billet four-corner flame peeling device and working method thereof

Abstract

The invention provides an on-line high-temperature continuous casting billet four-corner flame peeling device and a working method thereof.The device comprises a peeling device body installed on a continuous casting production line, the peeling device body comprises four mechanical arms, spray guns are arranged on the mechanical arms, and nozzles of the spray guns correspond to the two corners of one side of a continuous casting billet respectively; the rear end of the spray gun is connected with an oxygen pipe and a gas pipe, and an ultrasonic distance measuring sensor is installed beside the mechanical arm and the production line. An industrial personal computer and a PLC are used for controlling oxygen and gas valves to achieve timed flaming peeling and closing, the position of a mechanical arm is automatically adjusted according to the blank width through an ultrasonic distance measuring sensor, workers can be prevented from being scalded, meanwhile, the cleaning depth and cleaning cleanliness are guaranteed in a high-precision mode, and corner cracks and subcutaneous inclusions are cleaned in a high-quality mode; in order to prevent accumulation and ensure that the angular cleaning speed can be matched with the blank cutting speed, an ultrasonic sensor is used for judging the position of the casting blank to realize advanced firing and ensure the flame temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary equipment for post-processing or post-machining of casting blanks on site, and in particular to an online high-temperature continuous casting blank four-corner flame peeling device and a working method thereof. Background Art

[0002] Continuous casting is an extremely important part of the steelmaking process. Corner defects and subcutaneous inclusions in continuous casting billets affect the quality of continuous casting billets and thus affect the quality of steel, resulting in energy and economic losses. Patent CN206305399U relates to a continuous casting billet surface peeling and cleaning insulation device, including a high-temperature continuous casting slab. 1) A continuous casting billet surface peeling and cleaning device is installed on the high-temperature continuous casting slab. Its structure is that four columns are fixed on the four corners of the rectangular horizontal partition, and insulation plates are longitudinally fixed between the two columns on each long side of the horizontal partition. The spacing between two parallel insulation plates is 40-50cm, the length of the insulation plate is 3m, the width is 1.5m, and the distance between the lower end of the insulation plate and the surface of the high-temperature continuous casting slab is 25-35cm; 2) The insulation plate and the horizontal partition are both composed of cotton rock plates installed on a steel structure support frame; 3) The spacing between the two parallel insulation plates is 50cm; 4) The distance between the lower end of the insulation plate and the surface of the high-temperature continuous casting slab is 30cm.

[0003] At present, the peeling method of manually operated flame cutting gun is still used. The temperature of the newly produced continuous casting billet is as high as 600-1100℃. The operators are easily scalded when cleaning the high-temperature continuous casting billet. In addition, the cleaning depth varies during the manual cleaning process, resulting in the inability to effectively ensure the cleaning depth and cleaning flatness, and the inability to effectively clean up the inclusions and cracks at the corners of the slab, resulting in the continued existence of corner defects in the rolled steel, thereby causing the hot-rolled coil to be scrapped or downgraded.

[0004] Therefore, there is an urgent need for a method for manufacturing an online high-temperature continuous casting billet four-corner flame peeling device. Summary of the invention

[0005] According to the above technical problems that the existing high-temperature continuous casting billet cleaning is easy to burn the operator and the depth of the manual cleaning process is different, an online high-temperature continuous casting billet four-corner flame peeling device and its working method are provided. The present invention mainly uses PLC to control the oxygen and gas valves to achieve timed flame peeling and closing, thereby ensuring the cleaning depth and cleaning neatness with high precision.

[0006] The technical means adopted by the present invention are as follows:

[0007] An online high-temperature continuous casting billet four-corner flame peeling device comprises a peeling device installed on a continuous casting production line, the peeling device comprises four mechanical arms, the mechanical arms are provided with spray guns, the nozzles of the spray guns respectively correspond to the two corners on one side of the continuous casting billet; the rear ends of the spray guns are respectively connected to an oxygen pipe and a hydrogen pipe, and ultrasonic ranging sensors are installed on the mechanical arms and the production line; the peeling device is connected to an industrial computer, and the industrial computer is wirelessly connected to a PLC.

[0008] Furthermore, the peeling device is arranged behind the flame cutting machine and before the deburring machine.

[0009] Furthermore, a foot roller is provided at the lower end of the continuous casting slab, and the height of the spray gun is higher than the height of the foot roller.

[0010] Furthermore, a dust removal device and a dust removal duct are installed outside the peeling device as a whole.

[0011] The present invention also provides a working method of an online high-temperature continuous casting billet four-corner flame peeling device, comprising the following steps:

[0012] S1. Build the peeling device behind the flame cutting machine and in front of the deburring machine;

[0013] S2, through the cooperation of industrial computer and PLC, and combined with the billet speed, the peeling device is controlled;

[0014] S21, an ultrasonic distance measuring sensor is installed on the robot arm, and the actual distance between the spray gun nozzle on the robot arm and the continuous casting slab is calculated according to the time difference between the ultrasonic wave emitted to the side of the continuous casting slab and the ultrasonic wave reflected and received;

[0015] S22, compare the actual distance value with the target distance value, and feed it back to the PLC to adjust the position of the robot arm;

[0016] S23. To prevent accumulation and ensure that the clearing speed can match the billet discharge speed, an ultrasonic distance sensor is installed next to the production line. The ultrasonic sensor next to the production line is used to determine the position of the continuous casting slab, and the fire is preheated in advance to ensure that the flame temperature is at least 1530°C;

[0017] S24, the rear ends of the four-rod spray guns are connected to the oxygen pipe and the gas pipe respectively. When it is necessary to spray fire, the PLC controls the valve to open, and the spray gun nozzle sprays fire; when it is necessary to turn off the fire, the PLC controls the valve to close, and the spray gun nozzle turns off the fire;

[0018] S3. A large amount of smoke and dust is generated during the flame cleaning process. The pipeline pressure, flow rate and fan capacity parameters are set through the industrial computer to eliminate the smoke and dust and ensure the working environment.

[0019] Furthermore, in S2, the industrial computer serves as a data center and is responsible for real-time monitoring of the production process. The industrial computer uploads data to the PLC, and the PLC is responsible for online control of the spray gun. The two are integrated to achieve efficient operation of the peeling device.

[0020] Furthermore, the target distance is to ensure that the distance between the nozzle and the side of the continuous casting slab is within 5±2 mm.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The invention controls oxygen and gas valves through an industrial computer and a PLC to realize timed flame spraying, peeling and shutting down. The ultrasonic ranging sensor is used to automatically adjust the position of the mechanical arm according to the width of the billet, so as to prevent workers from being scalded. At the same time, the cleaning depth and the cleaning neatness are guaranteed with high precision, and the corner cracks and subcutaneous inclusions are cleaned with high quality. In order to prevent accumulation and ensure that the corner cleaning speed can match the billet cutting speed, the ultrasonic sensor is used to judge the billet position, so as to realize early firing and ensure the flame temperature.

[0023] The present invention observes the working status of the device through the industrial control computer in daily work, processes the device in time, and ensures the production progress and device reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the device of the present invention.

[0026] In the figure: 1. continuous casting slab; 2. spray gun; 3. nozzle; 4. foot roller; 5. industrial computer; 6. robotic arm; 7. dust removal device. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] like Figure 1 As shown, the present invention provides an online high-temperature continuous casting billet four-corner flame peeling device, the peeling device is arranged at a position behind the flame cutting machine and in front of the deburring machine; the peeling device comprises four mechanical arms 6, the mechanical arms 6 are provided with spray guns 2, the nozzles 3 of the spray guns 2 respectively correspond to the two corners on one side of the continuous casting billet 1; the height of the spray gun 2 is higher than the height of the foot roller 4, the rear ends of the spray gun 2 are respectively connected to the oxygen pipe and the gas pipe, and ultrasonic ranging sensors are installed on the mechanical arms 6 and the production line; the peeling device is connected to the industrial computer 5, and the industrial computer 5 is wirelessly connected to the PLC; the peeling device is controlled by the cooperation of the industrial computer and the PLC and in combination with the billet discharge speed, the billet discharge speed is generally 3m / min, and the billet discharge speed is generally coordinated with the continuous casting machine drawing speed.

[0035] During the implementation in the continuous casting workshop, the peeling device is built behind the flame cutting machine and in front of the deburring machine. Flame peeling devices are installed at the four corners of the online high-temperature continuous casting billet around the continuous casting slab 1 production line. A steel structure mechanical arm 6 is designed to support four spray guns 2 at a position higher than the foot roller according to the spacing between the foot rollers 4 and the size requirements of the on-site continuous casting slab 1. According to the ultrasonic measurement sensor, the mechanical arm 6 is automatically adjusted to make the four nozzles 3 distributed up and down in pairs, facing the two corners on one side of the high-temperature continuous casting slab 1 respectively. The industrial computer 5 and PLC are connected to the spray gun 2 to coordinate with the billet discharge speed to realize timed firing, firing off and preheating.

[0036] An ultrasonic distance measuring sensor is installed on the robot arm 6. The sound velocity of ultrasonic waves is different at different temperatures. For every 1°C increase in temperature, the ultrasonic propagation speed increases by 0.607m / s. The ultrasonic sound velocity is temperature compensated at different temperatures. The sound velocity value of the temperature-compensated ultrasonic wave is more accurate. After the sound velocity of the ultrasonic wave is determined, the distance between the spray gun 2 and the continuous casting slab 1 can be obtained as long as the time difference from the emission to the reception of the ultrasonic distance measuring sensor is known. The actual distance value is compared with the target distance value (the target distance is to ensure that the distance between the nozzle and the side of the continuous casting slab is within 5±2mm), and the feedback is sent to the PLC to adjust the position of the robot arm 6.

[0037] Flame cutting usually completes one cut within 2 minutes, and the cutting speed is generally 450mm / min. In daily production, the billet discharge speed and the cutting speed have been coordinated. As long as the corner clearing speed can match the billet discharge speed, it can also match the cutting speed. The coordination of the three enables the production line to complete the progress step by step; ensure that the corner clearing speed matches the billet discharge speed, and then matches the billet cutting speed to ensure smooth production.

[0038] On the basis of ensuring that the corner clearing speed is greater than the billet discharge speed, an ultrasonic ranging sensor is installed next to the production line 2m in front of the fixed position of the spray gun 2. Once the billet is found to be 2m in front of the spray gun 2, the oxygen and hydrogen valves are opened to preheat the temperature to 1530℃; when the ultrasonic ranging sensor of the robot arm 6 finds that the continuous casting slab has left, the oxygen and hydrogen valves are automatically closed to automatically shut down the fire.

[0039] A large amount of smoke and dust is generated during the flame cleaning process. The dust removal device 7 and the dust removal pipeline are installed according to the overall layout of the actual situation of the production line. The pipeline pressure, flow rate and fan capacity parameters are set through the industrial computer 5 to effectively eliminate the smoke and dust and ensure the working environment.

[0040] When the equipment is working, the industrial computer 5 acts as a data center and is responsible for real-time monitoring of the equipment operation during the production process. The PLC is responsible for online control tasks such as the spray gun 2, the robotic arm 6, and the valve, and they are integrated to realize the efficient operation of the online high-temperature continuous casting billet four-corner flame peeling device. Remote control is realized.

[0041] In order to ensure that the peeling device has excellent corner cleaning quality, the device needs to be constantly tested and parameters adjusted during use. The mixing ratio, flow rate and flow rate of oxygen and fuel gas in the nozzle 3 are adjusted through the industrial computer 5 to ensure that the flame can complete the corner cleaning work with high quality.

[0042] Prevent operators from getting burned, ensure cleaning depth and cleanliness with high precision, and clean corner cracks and subcutaneous inclusions with high quality.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An online high-temperature continuous casting billet four-corner flame peeling device, characterized in that: It comprises a peeling device installed on a continuous casting production line, the peeling device comprises four mechanical arms, the mechanical arms are provided with spray guns, the nozzles of the spray guns respectively correspond to the two corners on one side of the continuous casting slab; the rear ends of the spray guns are respectively connected to an oxygen pipe and a gas pipe, and ultrasonic ranging sensors are installed beside the mechanical arms and the production line; the peeling device is connected to an industrial computer, and the industrial computer is wirelessly connected to a PLC.

2. The online high-temperature continuous casting billet four-corner flame peeling device according to claim 1 is characterized in that: The peeling device is arranged behind the flame cutting machine and in front of the deburring machine.

3. The online high-temperature continuous casting billet four-corner flame peeling device according to claim 1 or 2, characterized in that: A foot roller is arranged at the lower end of the continuous casting slab, and the height of the spray gun is higher than that of the foot roller.

4. The online high-temperature continuous casting billet four-corner flame peeling device according to claim 1 is characterized in that: A dust removal device and a dust removal pipeline are installed outside the peeling device as a whole.

5. A method for operating an online high-temperature continuous casting billet four-corner flame peeling device, which is implemented based on the online high-temperature continuous casting billet four-corner flame peeling device according to any one of claims 1 to 4, characterized in that: The steps include: S1. Build the peeling device behind the flame cutting machine and in front of the deburring machine; S2, through the cooperation of industrial computer and PLC, and combined with the billet speed, the peeling device is controlled; S21, an ultrasonic distance measuring sensor is installed on the robot arm, and the actual distance between the spray gun nozzle on the robot arm and the continuous casting slab is calculated according to the time difference between the ultrasonic wave emitted to the side of the continuous casting slab and the ultrasonic wave reflected and received; S22, compare the actual distance value with the target distance value, and feed it back to the PLC to adjust the position of the robot arm; S23. To prevent accumulation and ensure that the clearing speed can match the billet discharge speed, an ultrasonic distance sensor is installed next to the production line. The ultrasonic sensor next to the production line is used to determine the position of the continuous casting slab, and the fire is preheated in advance to ensure that the flame temperature is at least 1530°C; S24, the rear ends of the four-rod spray guns are connected to the oxygen pipe and the gas pipe respectively. When it is necessary to spray fire, the PLC controls the valve to open, and the spray gun nozzle sprays fire; when it is necessary to turn off the fire, the PLC controls the valve to close, and the spray gun nozzle turns off the fire; S3. A large amount of smoke and dust is generated during the flame cleaning process. The pipeline pressure, flow rate and fan capacity parameters are set through the industrial computer to eliminate the smoke and dust and ensure the working environment.

6. An online high-temperature continuous casting billet four-corner flame peeling device working method, characterized in that: In S2, the industrial computer serves as a data center and is responsible for real-time monitoring of the production process. The industrial computer uploads data to the PLC, which is responsible for online control of the spray gun. The two systems are integrated to achieve efficient operation of the peeling device.

7. An online high-temperature continuous casting billet four-corner flame peeling device working method, characterized in that: The target distance is to ensure that the distance between the nozzle and the side of the continuous casting slab is within 5±2 mm.

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