Preheating device for stainless steel band production

Abstract

The invention provides a preheating device for stainless steel band production, and relates to the field of stainless steel band production, the preheating device comprises a conveying chain, a heating bin, a heat insulation bin and a temperature control system, a stainless steel band can be placed on the conveying chain to move along with the conveying chain, and the stainless steel band is conveyed into the heating bin through the conveying chain; a heating inlet and a heating outlet are formed in the side wall of the heating bin, the conveying chain penetrates through the heating bin through the heating inlet and the heating outlet, the bin wall of the upper end of the heating bin is a cambered surface, the periphery of the bin wall of the lower end of the heating bin is a cambered surface, the center position of the bin wall of the lower end of the heating bin is a plane, and reflection pieces are arranged on the bin wall of the heating bin. Compared with the prior art, the device has the beneficial effects that the collected hot air is sprayed on the stainless steel band through the circulating channel, the stainless steel band is preheated in advance, the preheated stainless steel band enters the heating bin through the conveying chain and is heated again through the heating bin, and the situation that the stainless steel band is deformed or fractured due to the high temperature of 1000 DEG C in the heating bin is avoided.

Description

Technical Field

[0001] The invention relates to the field of stainless steel strip production, in particular to a preheating device for stainless steel strip production. Background Art

[0002] During the processing of stainless steel strip, it is necessary to preheat the stainless steel strip first. Stainless steel steel directly enters a high-temperature environment and breaks. A preheating device for stainless steel strip production with publication number CN214666083U has been retrieved, comprising a processing box, a slide groove is fixedly connected to the bottom inner wall of the processing box, a slider is movably connected inside the slide groove, a moving frame is fixedly connected to the upper surface of the slider, an electric cylinder is fixedly connected inside the top of the moving frame, an electric push rod is fixedly connected to the output end of the electric cylinder, a vertical plate is fixedly connected to the top of the electric push rod, a stepping motor is fixedly connected to the top of the vertical plate, a rotating shaft is fixedly connected to the output end of the stepping motor, a limiting ring is provided on the outer surface of the rotating shaft away from the stepping motor, a fixed roller is provided on the outer surface of the left rotating shaft and on the right side of the left limiting ring, a servo motor is fixedly connected to the outer surface of the processing box, and a lead screw is fixedly connected to the output end of the servo motor.

[0003] However, in the above technology, the stainless steel belt can be driven to move to the processing box by the fixed roller. When the processing box is heated, hot air is easily lost, resulting in an increase in the temperature in the factory. Summary of the invention

[0004] The problem to be solved by the present invention is to reduce the loss of hot air and avoid the occurrence of temperature rise in the factory.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a preheating device for stainless steel strip production, including a conveyor chain, a heating chamber, an insulating chamber and a temperature control system. The stainless steel strip can be placed on the conveyor chain and move with the conveyor chain. The stainless steel strip is transported to the heating chamber through the conveyor chain. A heating inlet and a heating outlet are arranged on the side wall of the heating chamber. The conveyor chain passes through the heating chamber through the heating inlet and the heating outlet. The heating chamber is divided into an upper and a lower end. The chamber wall of the upper end of the heating chamber is an arc surface, and the surrounding areas of the chamber wall of the lower end of the heating chamber are arc surfaces. The center position of the chamber wall of the lower end of the heating chamber is a plane. A reflector is arranged on the chamber wall of the heating chamber. An infrared heating device is also provided, and the infrared heating device is cylindrical. The infrared heating device is arranged along the length direction of the conveying chain. The reflective sheet can reflect the heat generated by the infrared heating device into the heating bin to increase the temperature in the heating bin. An insulating bin is provided on the outer layer of the heating bin. The top wall inside the insulating bin is dome-shaped. An air collecting port is provided on the top wall of the insulating bin. The air collecting port is connected to an air collecting channel. A circulation channel is also connected to the air collecting channel. The circulation channel is arranged above the conveying chain. A boost jet is provided at the lower end of the circulation channel. The air in the circulation channel can be sprayed onto the stainless steel belt on the conveying chain through the boost jet.

[0006] More preferably, the air collecting channel is in the shape of "7", and includes a transverse channel and a vertical channel. An air pump is provided at the connection between the transverse channel and the vertical channel, and the air pump can draw air in the transverse channel into the vertical channel. A metal fiber filter is provided at the connection between the vertical channel and the circulation channel.

[0007] More preferably, a collecting device is further provided on the wall of the heat-insulating bin at the lower end of the gas collecting channel, and the collecting device includes a fixed bin and a collecting box. The fixed bin is provided at the lower end of the vertical channel, and the fixed bin is in the shape of a rectangular cylinder.

[0008] More preferably, the center position of the fixed bin is connected to the vertical channel, the two ends of the fixed bin are located on both sides of the vertical channel, and the fixed bins on both sides are provided with upper covers, a screw motor is provided on the inner wall of the fixed bin, a limiting slide is also provided on the inner wall of the fixed bin, the limiting slide is provided on the opposite side of the screw motor, and a limiting card is provided on the side wall of the collection box, and the limiting card can move in the limiting slide.

[0009] More preferably, the center position of the fixed bin is connected to the vertical channel, the two ends of the fixed bin are located on both sides of the vertical channel, and upper covers are provided on the fixed bins on both sides, a screw motor is provided in the bin wall of the heat-insulating bin, a limiting slide is also provided on the inner wall of the fixed bin, the limiting slide is provided on the opposite side of the screw motor, and a limiting card is provided on the side wall of the collection box, and the limiting card can move in the limiting slide.

[0010] More preferably, a safety door is provided on the outer wall of the heat-insulating bin, and a temperature display is provided on the safety door. The temperature display can detect the temperature of the heat-insulating bin inside the safety door, and the temperature display is connected to the temperature control system.

[0011] Preferably, the temperature control system includes a temperature sensor module, a PLC controller, a drive module, a heating control module and an alarm module. The temperature sensor module can monitor the temperature in the heating chamber in real time, and can convert the temperature signal into an electrical signal and transmit it to the PLC controller. The PLC controller cooperates with the heating control module to control the output power of the infrared heating device according to the set parameters, thereby adjusting the temperature in the heating chamber. When the temperature in the insulation chamber exceeds the threshold value through the temperature display, the PLC controller can also control the alarm module to sound an alarm.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the heat generated by the infrared heating device is concentrated into the heating chamber through the reflective sheet, and the stainless steel strip is efficiently heated while being able to better prevent the overflow of hot air. The overflowed hot air can also be collected through the air collecting port and the air collecting channel on the insulation chamber, and the collected hot air is sprayed onto the stainless steel strip through the circulation channel to preheat the stainless steel strip in advance. The preheated stainless steel strip enters the heating chamber through the conveyor chain and is heated again by the heating chamber to avoid deformation or breakage of the stainless steel strip due to the high temperature of 1000°C in the heating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the bottom structure of the collecting device of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the collecting device of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the fixed bin of the present invention; Figure 6 This is a schematic diagram of the lower end structure of the heating bin of the present invention; Figure 7 This is a schematic diagram of the top structure of the heat insulation bin of the present invention; Among them, 1- conveying chain, 2- heating chamber, 3- insulation chamber, 4- reflective sheet, 5- infrared heating device, 6- horizontal channel, 7- vertical channel, 8- vacuum pump, 9- circulation channel, 10- pressurized jet nozzle, 11- fixed chamber, 12- collection box, 13- screw motor, 14- limit slide, 15- limit card, 16- circulation port, 17- metal fiber filter, 18- safety door, 19- temperature display, 20- air collecting port. DETAILED DESCRIPTION

[0014] 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, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be an electrical connection; it can be a hydraulic oil circuit connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0017] See also Figures 1 to 7As shown, a preheating device for stainless steel strip production includes a conveyor chain 1, a heating chamber 2, an insulating chamber 3 and a temperature control system. The conveyor chain 1 is a roller chain structure. The stainless steel strip can be placed on the conveyor chain 1 and move with the conveyor chain 1. The stainless steel strip is transported to the heating chamber 2 through the conveyor chain 1. Since the conveyor chain 1 is a roller chain structure, the conveyor chain 1 has a smaller shielding area for the stainless steel strip, so that hot air can pass through the gap of the conveyor chain 1, thereby heating the stainless steel strip, which can greatly increase the heating area of ​​the stainless steel strip and shorten the preheating time. A heating inlet and a heating outlet are provided on the side wall of the heating chamber 2. The conveyor chain 1 can drive the stainless steel strip to enter from the heating inlet, pass through the interior of the heating chamber 2 and then pass out from the heating outlet. The heating chamber 2 is divided into an upper and lower end based on the transverse plane where the conveyor chain 1 is located. The top wall of the upper end of the heating chamber 2 is an arc surface. The heating chamber 2 The walls of the lower end of the warehouse are surrounded by curved surfaces, and the center position of the lower end of the warehouse wall of the heating warehouse 2 is a plane. The warehouse wall of the heating warehouse 2 is made of ceramic fiber material, and the ceramic fiber material can better prevent the temperature in the heating warehouse 2 from leaking out. Reflective sheets 4 are provided on the warehouse walls at the upper and lower ends of the heating warehouse 2, and two infrared heating devices 5 are also provided in the heating warehouse 2. The infrared heating devices 5 are respectively provided at the upper and lower ends of the heating warehouse 2, and the infrared heating devices 5 are cylindrical. The infrared heating devices 5 are arranged along the length direction of the conveyor chain 1. When the conveyor chain 1 drives the stainless steel belt to move, the stainless steel belt can be located between the upper and lower infrared heating devices 5. The heat generated by the infrared heating device 5 can be better concentrated in the central area through the special shape of the warehouse wall of the heating warehouse 2 and the reflective sheet 4 laid on the warehouse wall of the heating warehouse 2, so that the heating warehouse 2 can better heat the stainless steel belt on the conveyor chain 1.

[0018] The insulation bin 3 is arranged on the outer layer of the heating bin 2, and the top wall inside the insulation bin 3 is dome-shaped. An air collecting port 20 is arranged on the top wall of the insulation bin 3, and the air collecting port 20 is connected to the air collecting channel. The air collecting channel is in the shape of a "7" consisting of a transverse channel 6 and a vertical channel 7. An air pump 8 is arranged at the connection between the transverse channel 6 and the vertical channel 7. The air pump 8 can extract the air in the transverse channel 6 into the vertical channel 7, wherein the vertical channel 7 is arranged in the direction of the heating inlet, and the vertical channel 7 is also connected to a circulation channel 9. The circulation channel 9 is arranged above the conveying chain 1 along the length direction of the conveying chain 1, and a metal fiber filter 17 is arranged at the connection between the vertical channel 7 and the circulation channel 9. Harmful substances in the air can be filtered through the metal fiber filter 17, so that the filtered air enters the circulation channel 9, and a boost jet 10 is arranged at the lower end of the circulation channel 9. The air in the circulation channel 9 can be sprayed onto the stainless steel belt on the conveying chain 1 through the boost jet 10.

[0019] A collecting device is also provided at the lower end of the gas collecting channel, and the collecting device includes a fixed bin 11 and a collecting box 12. The fixed bin 11 is provided at the lower end of the vertical channel 7, and the fixed bin 11 is in a rectangular cylindrical shape. The center of the fixed bin 11 is connected to the vertical channel 7, and the two ends of the fixed bin 11 are located on both sides of the vertical channel 7, and the fixed bins 11 on both sides are provided with upper covers. A screw motor 13 is provided in the bin wall of the heat-insulating bin 3, and the screw motor 13 is connected to the temperature control system, and the temperature control system can control the operation of the screw motor 13. The collecting box 12 is connected to the slider of the screw motor 13. A limit slide 14 is also provided on the inner wall of the fixed bin 11. The limit slide 14 is provided on the opposite side of the screw motor 13. A limit card 15 is provided on the side wall of the collecting box 12. The limit card 15 can move in the limit slide 14 to prevent the collecting box 12 from being offset. There are two collecting boxes 12. The two collecting boxes 12 are arranged in parallel. The screw motor 13 can cooperate with the limit slide 14 and the limit card 15 to drive the two collecting boxes 12 in the fixed bin. 11 moves horizontally. After the movement is completed, one of the two collecting boxes 12 must be located below the vertical channel 7 and connected to the vertical channel 7, and a circulation port 16 is provided on the side wall of the collecting box 12. When the collecting box 12 is located below the vertical channel 7, the circulation port 16 on its side wall is connected to the circulation channel 9, and the metal fiber filter 17 on the circulation channel 9 corresponds to the circulation port 16 of the collecting box 12, and the side wall of the collecting box 12 fits with the metal fiber filter 17, so that the air and floating objects in the vertical channel 7 can enter the collecting box 12, and then pass through the circulation port 16 on the side wall of the collecting box 12, and enter the circulation channel 9 after being filtered by the metal fiber filter 17, and when the collecting box 12 moves, the side wall of the collecting box 12 can scrape and clean the metal fiber filter 17, so as to avoid the metal fiber filter 17 from being blocked after long-term use, and a gravity sensor is also provided at the bottom of the collecting box 12, and the gravity sensor is connected to the temperature control system.

[0020] A safety door 18 is also provided on the outer wall of the heat-insulating bin 3, and a temperature display 19 is provided on the safety door 18. The temperature display 19 can detect the temperature of the heat-insulating bin 3 inside the safety door 18, and display the detection result on the temperature display 19, and the temperature display 19 is connected to the temperature control system, and the temperature display 19 can upload the detected temperature to the temperature control system. The temperature control system includes a temperature sensor module, a PLC controller, a drive module, a heating control module and an alarm module. The temperature in the heating bin 2 can be monitored in real time through the temperature sensor module, and the temperature signal can be converted into an electrical signal and transmitted to the PLC controller, and then the PLC control The output power of the infrared heating device 5 is controlled in cooperation with the heating control module according to the set parameters, so as to adjust the temperature in the heating chamber 2, and when the gravity sensor detects that the weight in the collection box 12 reaches the set threshold, the PLC controller will control the screw motor 13 through the drive module to drive the collection box 12 to move, so that the bottom of the vertical channel 7 is replaced by another collection box 12, and the bottom wall of the collection box 12 can be flipped open. Opening the bottom wall of the collection box 12 can regularly clean the inside of the collection box 12, and when the temperature of the insulation chamber 3 exceeds the set safety threshold, the alarm module will sound an alarm to prevent staff from entering through the safety door 18.

[0021] When in use, first set the temperature of the heating chamber 2 and the required heating time. When the required heating time is long, the speed of the conveying chain 1 is controlled to be reduced. When the required heating time is short, the speed of the conveying chain 1 is controlled to be increased. When the set temperature is reached in the heating chamber 2, the vacuum pump 8 is started. The hot air in the heating chamber 2 mainly overflows through the heating outlet, and the hot air rises and enters the transverse channel 6. After entering the vertical channel 7 along the vacuum pump 8, the hot air then enters the collecting box 12, and enters the circulation channel 9 through the circulation port 16 and the metal fiber filter 17 on the side wall of the collecting box 12, and is ejected downward from the boost jet port 10 at the lower end of the circulation channel 9. At this time, start the conveying chain 1, so that the conveying chain 1 is operated to drive the stainless steel belt to move, so that the hot air ejected from the boost jet port 10 is sprayed on the stainless steel belt of the conveying chain 1 to heat the stainless steel belt. And it moves slowly, and the hot air ejected from the boost jet 10 first heats the stainless steel strip to prevent the stainless steel strip from directly entering the heating chamber 2 and being unable to withstand the high temperature in the heating chamber 2, which may cause the stainless steel strip to deform or break. In addition, the collecting box 12 can also collect pollutants such as metal oxide dust in the vertical channel 7, and when the weight of the pollutants accumulated in the collecting box 12 exceeds the threshold, the temperature control system will control the screw motor 13 to drive the collecting box 12 to move in the fixed chamber 11, so that the collecting box 12 under the vertical channel 7 is replaced, and during the movement of the collecting box 12, the side wall of the circulation port 16 will also scrape the metal fiber filter 17 to scrape off the pollutants on the metal fiber filter 17, and the heated stainless steel strip enters the heating chamber 2 from the heating inlet for further heating, and the heated stainless steel strip is transported out from the heating outlet.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A preheating device for stainless steel strip production, comprising a conveyor chain, a heating chamber, an insulation chamber and a temperature control system. The stainless steel strip can be placed on the conveyor chain and move with the conveyor chain. The stainless steel strip is transported to the heating chamber through the conveyor chain. The device is characterized in that: A heating inlet and a heating outlet are provided on the side wall of the heating bin, and the conveying chain passes through the heating bin through the heating inlet and the heating outlet, and the heating bin is divided into an upper and lower end, the bin wall at the upper end of the heating bin is an arc surface, the surrounding areas of the bin wall at the lower end of the heating bin are arc surfaces, and the center position of the bin wall at the lower end of the heating bin is a plane, a reflecting sheet is provided on the bin wall of the heating bin, and an infrared heating device is also provided in the heating bin, and the infrared heating device is cylindrical, and the infrared heating device is arranged along the length direction of the conveying chain, and the reflecting sheet can reflect the heat generated by the infrared heating device into the heating bin to increase the temperature in the heating bin, and an insulating bin is provided on the outer layer of the heating bin, and the top wall inside the insulating bin is dome-shaped, and an air collecting port is provided on the top wall of the insulating bin, and the air collecting port is connected to an air collecting channel, and a circulation channel is also connected to the air collecting channel, and the circulation channel is arranged above the conveying chain, and a boost jet is provided at the lower end of the circulation channel, and the air in the circulation channel can be sprayed onto the stainless steel belt on the conveying chain through the boost jet.

2. A preheating device for stainless steel strip production according to claim 1, characterized in that: The air collecting channel is in the shape of "7", and includes a transverse channel and a vertical channel. An air pump is provided at the connection between the transverse channel and the vertical channel. The air pump can draw air in the transverse channel into the vertical channel. A metal fiber filter is provided at the connection between the vertical channel and the circulation channel.

3. A preheating device for stainless steel strip production according to claim 2, characterized in that: A collecting device is also provided on the wall of the heat-insulating bin at the lower end of the gas collecting channel. The collecting device includes a fixed bin and a collecting box. The fixed bin is provided at the lower end of the vertical channel and is in the shape of a rectangular cylinder.

4. A preheating device for stainless steel strip production according to claim 3, characterized in that: The center position of the fixed bin is connected to the vertical channel, the two ends of the fixed bin are located on both sides of the vertical channel, and upper covers are provided on the fixed bins on both sides, a screw motor is provided in the bin wall of the heat-insulating bin, a limiting slide is also provided on the inner wall of the fixed bin, the limiting slide is provided on the opposite side of the screw motor, and a limiting card is provided on the side wall of the collection box, and the limiting card can move in the limiting slide.

5. A preheating device for stainless steel strip production according to claim 4, characterized in that: There are two collection boxes, which are arranged in parallel. The screw motor can cooperate with the limit slide and the limit card to drive the two collection boxes to move horizontally in the fixed warehouse. After the movement is completed, one of the two collection boxes must be located below the vertical channel and connected to the vertical channel, and a circulation port is provided on the side wall of the collection box.

6. A preheating device for stainless steel strip production according to claim 1, characterized in that: A safety door is also provided on the outer wall of the heat-insulating bin, and a temperature display is provided on the safety door. The temperature display can detect the temperature of the heat-insulating bin inside the safety door, and the temperature display is connected to the temperature control system.

7. A preheating device for stainless steel strip production according to claim 6, characterized in that: The temperature control system includes a temperature sensor module, a PLC controller, a drive module, a heating control module and an alarm module. The temperature sensor module can monitor the temperature in the heating chamber in real time, and can convert the temperature signal into an electrical signal and transmit it to the PLC controller. The PLC controller cooperates with the heating control module to control the output power of the infrared heating device according to the set parameters, thereby adjusting the temperature in the heating chamber. When the temperature in the insulation chamber exceeds the threshold value through the temperature display, the PLC controller can also control the alarm module to sound an alarm.

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