An automatic purge system for the heating furnace inlet area

Abstract

The present invention provides an automatic purge system for a process scale in the furnace entry area of ​​a heating furnace, and relates to the field of automatic purge technology. The automatic purge system for a process scale in the furnace entry area of ​​a heating furnace comprises a box body, a blower is fixedly connected to one side of the middle of the front wall of the box body, and multiple evenly distributed shunt control valves are arranged on the periphery of both sides of the annular air pipe, and the top wall of the shunt control valve is connected to a hose, and the end of the hose away from the shunt control valve is connected to a blow head. The blow heads are connected in parallel through the shunt control valve, so as to prevent the blockage of the blow heads in series and make the whole device unusable, and the PLC host controls each actuator to act in sequence, so as to reduce the labor intensity of employees, and at the same time, the swing of the blow head is used to increase the purge area, and the electrostatic dust removal plate is used to adsorb dust, so as to prevent the wear of the sensor caused by iron oxide, dust, etc.

Description

Technical Field

[0001] The invention relates to the technical field of automatic purge technology, in particular to an automatic purge system for a furnace entry area process of a heating furnace. Background Art

[0002] Heating furnace is a kind of equipment with extremely wide application. It is used in many industries such as petroleum, materials, pharmaceuticals, metallurgy, etc. In the steel industry, heating furnace is often used to heat the metal to a sufficient temperature for subsequent rolling and forging. In order to improve the production quality of steel, it is necessary to add some catalysts or other materials before entering the furnace. At the same time, in order to prevent serious accidents such as steel piling on the rolling line, the added catalysts or materials need to be weighed. However, there is usually a lot of dust on site in the steel industry, so the process scale needs to be cleaned after each weighing to ensure the accuracy of the weighing.

[0003] According to on-site observations, the purging parts are usually connected in series in the same pipeline. Therefore, if a blockage occurs during use, the entire device may be unusable. In addition, each shift requires manual purge of the process scale sensor with a hair dryer. The labor intensity of employees is high and there is a certain amount of energy waste. The iron oxide scale, dust and other dust blown up may wear the sensor with the airflow and affect the sensor accuracy. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an automatic purge system for a process scale in the furnace entry area of ​​a heating furnace, which solves the problems of the device being unusable due to pipeline blockage, high labor intensity for employees, and dust causing wear on sensors.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic purge system for the process of heating furnace entry area, comprising a box body, dust collecting bins are fixedly connected on both sides of the box body, a fan is fixedly connected on one side of the middle of the front wall of the box body, an air intake pipe is fixedly connected to the bottom wall of the fan, a solenoid valve is arranged on the periphery of the middle of the air intake pipe, a rear wall of the solenoid valve is fixedly connected to one side of the lower front wall of the box body, an end of the air intake pipe away from the fan passes through the bottom of the front wall of the box body, an annular air pipe is arranged on the bottom of the inner wall of the box body, the annular air pipe is connected to the air intake pipe, a plurality of evenly distributed branch control valves are arranged on the periphery of both sides of the annular air pipe, the top wall of the branch control valve is connected to a hose, and the end of the hose away from the branch control valve is connected to a blowing head.

[0006] Preferably, a fixed block is fixedly connected to the middle of the bottom wall of the box body, a plurality of evenly distributed weighing sensors 2 are fixedly connected to the middle of the top wall of the fixed block, the top walls of the two weighing sensors are fixedly connected to the bottom end of the load-bearing plate, a plurality of evenly distributed weighing sensors 1 are fixedly connected to the middle of the top of the load-bearing plate, and the tops of the weighing sensors 1 are fixedly connected to the bottom wall of the scale body.

[0007] Preferably, the inside of one side of the fixed block and the other side of the top wall are fixedly connected with a plurality of evenly distributed fixed boxes, the top wall of the fixed box is fixedly connected with a motor, the output end of the motor passes through the fixed box and is fixedly connected with a fixed cylinder, the inside of the fixed cylinder is rotatably connected with a support frame, a support cylinder is provided on the outside of the motor output end, the bottom wall of the support cylinder is fixedly connected to the top wall of the fixed box, the outer periphery of the support cylinder is slidably connected with a slip ring, the outer periphery of the slip ring is fixedly connected with a fixed plate, the bottom end of the fixed plate away from the slip ring is fixedly connected with a micro electric push rod, the bottom end of the micro electric push rod is fixedly connected to the outside of the top wall of the fixed box, one end of the support frame is slidably connected to the upper part of the inner wall of the slip ring, and the other end of the support frame is fixedly connected to the bottom wall of the hair dryer head.

[0008] Preferably, a connecting tube is provided on the outer periphery of the annular air pipe at the rear, a through groove is provided on the outer periphery of the connecting tube, one side of the through groove is connected to the annular air pipe, an arc-shaped cover plate is slidably connected to the outer side of the through groove, a slide plate is rotatably connected to the lower part of one side of the arc-shaped cover plate, the slide plate is slidably connected to a support block at one end away from the arc-shaped cover plate, and the bottom wall of the support block is fixedly connected to the rear part of the bottom wall inside the box.

[0009] Preferably, the front and rear parts of both side walls of the box body are fixedly connected with stepper motors, the output ends of the stepper motors pass through the box body and are fixedly connected with gears, the gears are meshed with the front and rear ends of the gear plates, and the front and rear parts of the gear plates away from one end are slidably connected to the front and rear parts of both side walls of the box body through T-shaped sliders.

[0010] Preferably, the inner wall of the dust collecting bin is fixedly connected to one side away from the box body with an electric push rod, the opposite end of the two electric push rods is fixedly connected to an electrostatic dust removal plate, the bottom of the electrostatic dust removal plate away from one end is fixedly connected to an L-shaped support plate, the bottom end of the L-shaped support plate is slidably connected to a limit plate, both ends of the limit plate are fixedly connected to the middle part of the side walls on both sides of the dust collecting bin, the front and rear parts of the bottom wall of the dust collecting bin are fixedly connected with an inclined plate, and the middle part of the bottom wall of the dust collecting bin is slidably connected to a collection box.

[0011] Preferably, a control box is fixedly connected to the rear wall of the box body, heat dissipation grooves are provided on both side walls of the control box, and a PLC host is fixedly connected to the middle of the inner bottom wall of the control box.

[0012] Preferably, it comprises an input module, a timing module, a quantitative module, a data processing module and an output module, wherein the input module, the timing module, the quantitative module, the data processing module and the output module are all implemented based on a PLC host, the input module is connected to the data processing module, the data processing module is connected to the timing module and the quantitative module, and the data processing module is connected to the output module, wherein:

[0013] The input module is used to control the weighing sensor 1 and the weighing sensor 2. After the weighing is completed, the weighing sensor 1 and the weighing sensor 2 will transmit the weighing signal detected on site to the input module through the data transmission serial port. After receiving the signal, the input module transmits the signal to the data processing module through the data transmission serial port;

[0014] The timing module is used to control the working time of the fan. The timing module can calculate the remaining working time. When the countdown ends, the timing module transmits the signal to the data processing module through the data transmission serial port;

[0015] The quantitative module is used to control the opening and closing of the solenoid valve. The quantitative module calculates the time and air flow rate. When the rated air volume passes through the solenoid valve, the signal is transmitted to the data processing module through the data transmission serial port;

[0016] The data processing module is used to convert and analyze the signal. After the input module, timing module and quantitative module transmit the signal to the data processing module through the data transmission serial port, the data processing module analyzes and determines the commands to be executed and sends them out in sequence;

[0017] The output module is used to connect various external actuators. The output module transmits signals to the fan, solenoid valve, motor, micro electric push rod, stepper motor and electric push rod 2 through the external data transmission serial port to control them to start and stop in sequence.

[0018] Working principle: When weighing sensor 1 and weighing sensor 2 complete weighing, they transmit the signal to the input module through the data transmission serial port. The input module transmits the signal to the data processing module through the data transmission serial port. After conversion and analysis, the data processing module transmits the command to the output module through the data transmission serial port. The output module controls the fan to work through the external data transmission serial port, so that the air is sucked into the intake pipe. At the same time, the timing module starts timing and the quantitative module starts calculating the amount of air flowing in. When the airflow enters the annular air pipe along the intake pipe and enters the hair dryer through the hose through the branch control valve, the output module controls the motor, micro electric push rod, stepper motor and electric push rod 2 to act in sequence. The motor drives the fixed cylinder to drive the support frame to rotate within a certain angle, thereby swinging the air blowing head through the support frame. At the same time, the micro electric push rod drives the slip ring to slide along the outer circumference of the support cylinder through the fixed plate. Since one end of the support frame slides on the upper part of the inner wall of the slip ring, the slip ring can drive the support frame to swing up and down when it moves up and down, so that the angle of the air blowing head can be flexible and variable, making the blowing area larger and preventing dust from adhering to the surface of the sensor. At the same time, the stepper motor drives the gear to rotate, and the meshing between the gear and the tooth plate is used to make the tooth plate move upward, and then the electrostatic dust removal plate is pushed into the box through the second electric push rod, so that the raised dust is sucked to the surface of the electrostatic dust removal plate. When the timing module ends, the signal is transmitted through the data The serial port is transmitted to the data processing module, and the data processing module issues a command to control the fan to stop working through the output module. When the rated air volume passes through the solenoid valve, the quantitative module transmits the information to the data processing module through the data transmission serial port, and the data processing module issues a command to control the solenoid valve to close through the output module. At the same time, the output module controls the control motor and the micro electric push rod to stop working. When the electric push rod 2 drives the electrostatic dust removal plate to return to the dust removal bin, the stepper motor reverses, so that the gear reverses and drives the gear plate to return to cover the dust removal bin. By disconnecting the external power supply of the electrostatic dust removal plate, the dust attached to the surface of the electrostatic dust removal plate slides along the inclined plate into the collection box on the bottom wall of the dust removal bin, thereby completing the dust removal and The purpose of collecting dust is to prevent the wear of sensors by iron oxide, dust, etc., to improve the accuracy of sensors, and to achieve the effect of timed, quantitative, and automatic purging to reduce the labor intensity of employees. In order to prevent dust from accumulating inside the annular air pipe after long-term use and causing clogging of the blower head, the branch control valve can be closed when the fan is working, and the slide plate can be pulled to make the arc cover slide to one side along the through groove, and when the arc cover is separated from the connecting part of the through groove and the annular air pipe, the arc cover is rotated to expose the connecting part of the through groove and the annular air pipe. Under the action of airflow, the dust inside the annular air pipe is blown out of the annular air pipe through the gap, and then adsorbed by the electrostatic dust removal plate, so as to achieve the purpose of cleaning the internal pipeline of the annular air pipe.

[0019] The present invention provides an automatic purge system for a process scale in a heating furnace inlet area. It has the following beneficial effects:

[0020] 1. The present invention draws external air into the air inlet pipe through the fan, utilizes the grid at the air inlet of the fan to prevent oversized debris from entering the fan and causing damage to the fan, and controls the on-off of the air inlet pipe through the solenoid valve, thereby realizing the control of the flow of airflow inside the equipment at the source, preventing the airflow from affecting the normal operation of the sensor and avoiding errors in weighing. Moreover, since the air inlet pipe is connected with the annular air pipe, the outer periphery of the annular air pipe is connected with multiple hoses through multiple branch control valves, so that the hair dryers connected with the hoses are in a state of being connected in parallel with each other, and the phenomenon that dust blocks the pipeline and makes the entire device unusable when the hair dryers are connected in series in the pipeline is prevented, thereby improving the practicability of the device.

[0021] 2. The present invention collects, analyzes and processes various signals through the input module, timing module, quantitative module, data processing module and output module inside the PLC host. After weighing, the weighing sensor 1 and the weighing sensor 2 will transmit the weighing signal detected on site to the input module through the data transmission serial port. The input module transmits the signal to the data processing module through the data transmission serial port. After analysis and processing by the data processing module, the command is transmitted to the timing module, quantitative module and output module respectively through the data transmission serial port. The timing module starts to calculate the remaining working time. The quantitative module determines whether the rated air volume is reached by calculating the time and air flow rate. The output module The output module transmits the command to the fan, motor, micro electric push rod, stepper motor and electric push rod 2 in sequence through the external data transmission serial port, and when the timing module and the quantitative module finish calculating, the signal is transmitted to the data processing module through the data transmission serial port, and then the command is transmitted to the output module through the data transmission serial port to control the fan, solenoid valve, motor, micro electric push rod, electric push rod 2 and stepper motor to reset in sequence, thereby ensuring the sequential action of the entire work process of the device, realizing automatic purge, reducing the labor intensity of employees, achieving the effect of timing and quantitative, avoiding unnecessary energy waste, achieving the effect of green economy, and meeting the requirements of modern production.

[0022] 3. The present invention drives the fixed cylinder to rotate through the motor, and then drives the support frame to swing through the fixed cylinder. Since one end of the support frame slides along the upper part of the inner wall of the slip ring, when the slip ring slides up and down along the outer circumference of the support cylinder under the action of the micro-electric push rod, it can drive the support frame to swing up and down at a certain angle, so that the angle of the blowing head can be flexibly adjusted to avoid dead angles, increase the blowing area of ​​the blowing head, and make it easier to blow away the dust attached to the surface of the sensor. When the dust is lifted up, the gear is driven to rotate by the stepping motor, and then the meshing between the gear and the toothed plate is utilized to make the toothed plate move upward to expose the dust collecting bin, and the electrostatic dust removal plate is pushed into the box body through the electric push rod 2, so that the lifted dust is sucked to the surface of the electrostatic dust removal plate. After a certain period of time, the electrostatic dust removal plate returns to the dust collecting bin and disconnects the external power supply, so that the adsorbed dust slides along the inclined plate into the collection box on the bottom wall of the dust collecting bin, thereby achieving the purpose of collecting dust, preventing the wear of the sensor by oxide iron sheet, dust, etc., and improving the accuracy of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a main perspective schematic diagram of the present invention;

[0024] Figure 2 It is a front perspective schematic diagram of the present invention;

[0025] Figure 3 It is a top view schematic diagram of the present invention;

[0026] Figure 4 It is a side perspective cross-sectional schematic diagram of the present invention;

[0027] Figure 5 It is a schematic diagram of the connection structure of the connection tube of the present invention;

[0028] Figure 6 It is a schematic diagram of the connection structure of the fixing block of the present invention;

[0029] Figure 7 It is a rear perspective cutaway schematic diagram of the present invention;

[0030] Figure 8 It is a rear perspective schematic diagram of the present invention;

[0031] Fig. 9 It is a schematic diagram of the control box connection structure of the present invention;

[0032] Fig.10 It is a workflow system diagram of the present invention;

[0033] Fig.11 This is the internal system diagram of the PLC host of the present invention.

[0034] Among them, 1. dust collection bin; 2. stepper motor; 3. box; 4. load-bearing plate; 5. weighing sensor 1; 6. scale body; 7. gear; 8. tooth plate; 9. hose; 10. fan; 11. collection box; 12. air inlet pipe; 13. connecting tube; 14. arc cover; 15. support block; 16. air blowing head; 17. fixed box; 18. branch control valve; 19. fixed block; 20. annular air pipe; 21. micro electric push rod; 22. fixed plate; 23. weighing sensor Device 2; 24, support cylinder; 25, motor; 26, slip ring; 27, slide plate; 28, support frame; 29, fixed cylinder; 30, electrostatic dust removal plate; 31, electric push rod 2; 32, L-shaped support plate; 33, limit plate; 34, inclined plate; 35, solenoid valve; 36, control box; 37, PLC host; 38, heat dissipation groove; 39, through groove; 40, input module; 41, timing module; 42, quantitative module; 43, data processing module; 44, output module. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. 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.

[0036] Example:

[0037] like Figure 1-11 As shown, an embodiment of the present invention provides an automatic purge system for a process inlet area of ​​a heating furnace, including a box body 3, dust collecting bins 1 are fixedly connected on both sides of the box body 3, a fan 10 is fixedly connected to one side of the middle of the front wall of the box body 3, an air intake pipe 12 is fixedly connected to the bottom wall of the fan 10, a solenoid valve 35 is arranged on the periphery of the middle of the air intake pipe 12, a rear wall of the solenoid valve 35 is fixedly connected to one side of the lower part of the front wall of the box body 3, an end of the air intake pipe 12 away from the fan 10 passes through the bottom of the front wall of the box body 3, an annular air pipe 20 is arranged on the bottom of the inner wall of the box body 3, the annular air pipe 20 is connected to the air intake pipe 12, and a plurality of evenly distributed branch control valves are arranged on the periphery of both sides of the annular air pipe 20. 18. The top wall of the shunt control valve 18 is connected with a hose 9, and the end of the hose 9 away from the shunt control valve 18 is connected with a blow head 16. The purpose of collecting dust is achieved through the dust collecting bin 1 to prevent dust accumulation from affecting the accuracy of the sensor, thereby preventing weighing errors from affecting the production quality. The purpose of providing purge gas is achieved through the fan 10, and the solenoid valve 35 is used to cut off the air supply. The shunt control valve 18 is used to enable the blow heads 16 to obtain the internal airflow of the annular air pipe 20 through the hose 9, thereby achieving the effect of independent air supply to multiple blow heads 16, avoiding the phenomenon that the entire pipeline cannot be used due to pipeline blockage.

[0038] A fixed block 19 is fixedly connected to the middle of the bottom wall of the box body 3, and a plurality of evenly distributed weighing sensors 23 are fixedly connected to the middle of the top wall of the fixed block 19. The top walls of the weighing sensors 23 are all fixedly connected to the bottom end of the load-bearing plate 4, and a plurality of evenly distributed weighing sensors 1 5 are fixedly connected to the middle of the top of the load-bearing plate 4. The tops of the weighing sensors 1 5 are all fixedly connected to the bottom wall of the scale body 6. The weighing sensor 2 23 is lifted by the fixed block 19 to avoid the situation where the airflow directly hits the weighing sensor 2 23 when the annular air pipe 20 is deflated, and the purpose of multi-stage weighing can be achieved by the weighing sensors 23 and the weighing sensors 1 5, thereby achieving the effect of improving the weighing accuracy and avoiding the actual production quality being affected by inaccurate weighing. In addition, since the two sides of the scale body 6 are arc-shaped, it is convenient to take out the weighed items along the inner surface.

[0039] A plurality of evenly distributed fixed boxes 17 are fixedly connected inside one side of the fixed block 19 and on the other side of the top wall, a motor 25 is fixedly connected to the top wall of the fixed box 17, an output end of the motor 25 passes through the fixed box 17 and is fixedly connected to a fixed cylinder 29, a support frame 28 is rotatably connected inside the fixed cylinder 29, a support cylinder 24 is arranged on the outside of the output end of the motor 25, a bottom wall of the support cylinder 24 is fixedly connected to the top wall of the fixed box 17, a slip ring 26 is slidably connected to the outer periphery of the support cylinder 24, a fixed plate 22 is fixedly connected to the outer periphery of the slip ring 26, a micro electric push rod 21 is fixedly connected to the bottom end of the fixed plate 22 away from the slip ring 26, the bottom end of the micro electric push rod 21 is fixedly connected to the outside of the top wall of the fixed box 17, one end of the support frame 28 is slidably connected to the upper part of the inner wall of the slip ring 26, The other end of the support frame 28 is fixedly connected to the bottom wall of the blower head 16, and the purpose of fixing the motor 25 and the support tube 24 is achieved through the fixed box 17, and the motor 25 is protected to a certain extent. The support frame 28 can be limited by the fixed tube 29 to prevent the support frame 28 from deflecting. Since one end of the support frame 28 rotates on the inner wall of the slip ring 26 and the other end is connected to the blower head 16, the micro-electric push rod 21 drives the slip ring 26 to slide up and down along the outer periphery of the support tube 24 through the fixed plate 22, which can drive the blower head 16 to swing up and down. At the same time, when the motor 25 drives the fixed tube 29 to rotate, the blower head 16 can be rotated through the support frame 28, thereby achieving the purpose of increasing the blowing range of the blower head 16, thereby improving the blowing effect and reducing the probability of dust adhering to the sensor surface.

[0040] A connecting tube 13 is arranged on the periphery of the rear annular air pipe 20, and a through groove 39 is arranged on the periphery of the connecting tube 13. One side of the through groove 39 is communicated with the annular air pipe 20, and an arc-shaped cover plate 14 is slidably connected to the outer side of the through groove 39. A slide plate 27 is rotatably connected to the lower part of one side of the arc-shaped cover plate 14, and a support block 15 is slidably connected to the end of the slide plate 27 away from the arc-shaped cover plate 14. The bottom wall of the support block 15 is fixedly connected to the rear part of the bottom wall of the box body 3, and the slide plate 27 is limited by the support block 15 to prevent the slide plate 27 from moving away from the through groove 39 when the arc-shaped cover plate 14 is moved. The interior of one side of 39 is connected with the annular air pipe 20, and the length of the through groove 39 is more than twice the length of the arc cover plate 14. Therefore, when the slide plate 27 is pushed to slide to the other side, the arc cover plate 14 can be driven to slide along the through groove 39. When the arc cover plate 14 is out of the contact range between the annular air pipe 20 and the through groove 39, the arc cover plate 14 can rotate around the slide plate 27 to expose the gap, and then close the branch control valve 18 to blow out the dust accumulated inside the annular air pipe 20 through the gap through the fan 10, so as to prevent the accumulated dust from clogging the blow head 16 and affecting the normal air output of the blow head 16.

[0041] The front and rear parts of the side walls on both sides of the box body 3 are fixedly connected with stepper motors 2, and the output ends of the stepper motors 2 pass through the box body 3 and are fixedly connected with gears 7. The gears 7 are meshed with the front and rear ends of the toothed plates 8, and the front and rear parts of the toothed plates 8 that are away from one end are slidably connected to the front and rear parts of the side walls on both sides of the box body 3 through T-shaped sliders. The stepper motor 2 can drive the gear 7 to rotate, and because the gear 7 is meshed with the toothed plate 8, the toothed plate 8 can move up and down, thereby opening or covering the dust collecting bin 1, preventing the dust collecting device inside the dust collecting bin 1 from affecting the normal weighing, and the toothed plate 8 slides along the side walls on both sides of the box body 3 through the T-shaped slider to prevent the toothed plate 8 from tipping over, thereby achieving the effect of limiting the movement of the toothed plate 8.

[0042] The inner wall of the dust collecting bin 1 is fixedly connected to the side away from the box body 3 with an electric push rod 21, and the opposite end of the electric push rod 21 is fixedly connected to an electrostatic dust removal plate 30, and the bottom of the electrostatic dust removal plate 30 away from the end is fixedly connected to an L-shaped support plate 32, and the bottom end of the L-shaped support plate 32 is slidably connected to a limiting plate 33, and both ends of the limiting plate 33 are fixedly connected to the middle of the side walls on both sides of the dust collecting bin 1, and the front and rear parts of the inner bottom wall of the dust collecting bin 1 are fixedly connected with an inclined plate 34, and the middle of the inner bottom wall of the dust collecting bin 1 is slidably connected to the collecting box 11, and the purpose of pushing the electrostatic dust removal plate 30 out of the dust collecting bin 1 is achieved by the electric push rod 231. The raised dust is adsorbed onto the surface of the electrostatic dust removal plate 30, and after a certain period of time, the electrostatic dust removal plate 30 is driven to return to the dust collecting bin 1, and the purpose of supporting the electrostatic dust removal plate 30 is achieved through the L-shaped support plate 32, to prevent the electrostatic dust removal plate 30 from shaking and reduce the pressure on the electric push rod 2 31. When the electrostatic dust removal plate 30 returns to the dust collecting bin 1, the external power supply is disconnected, so that the dust adsorbed on the surface of the electrostatic dust removal plate 30 falls under the action of gravity. When the dust gathers to a certain extent, it can slide along the inclined plate 34 to the inside of the collection box 11, thereby achieving the purpose of dust removal and collection, and preventing the dust from falling into the box body 3 after being blown up.

[0043] A control box 36 is fixedly connected to the rear wall of the box body 3, and heat dissipation grooves 38 are provided on both side walls of the control box 36. A PLC host 37 is fixedly connected to the middle of the inner bottom wall of the control box 36. The control box 36 is used to protect the PLC host 37 and prevent the PLC host 37 from being exposed to the working environment and being damaged. The heat dissipation grooves 38 can prevent the internal temperature of the control box 36 from being too high and accelerating the aging of the internal components of the PLC host 37, thereby achieving the effect of extending the service life of the PLC host 37. The PLC host 37 can be used to control each actuator to act in sequence to complete the entire workflow.

[0044] It includes an input module 40, a timing module 41, a quantitative module 42, a data processing module 43 and an output module 44. The input module 40, the timing module 41, the quantitative module 42, the data processing module 43 and the output module 44 are all implemented based on the PLC host 37. The input module 40 is connected to the data processing module 43, and the data processing module 43 is connected to the timing module 41 and the quantitative module 42. The data processing module 43 is connected to the output module 44, wherein:

[0045] The input module 40 is used to control the weighing sensor 1 5 and the weighing sensor 2 23. After the weighing is completed, the weighing sensor 1 5 and the weighing sensor 2 23 will transmit the weighing signal detected on site to the input module 40 through the data transmission serial port. After receiving the signal, the input module 40 transmits the signal to the data processing module 43 through the data transmission serial port;

[0046] The timing module 41 is used to control the working time of the fan 10. The timing module 41 can calculate the remaining working time. When the countdown ends, the timing module 41 transmits the signal to the data processing module 43 through the data transmission serial port;

[0047] The quantitative module 42 is used to control the opening and closing of the solenoid valve 35. The quantitative module 42 calculates the time and the air flow rate. When the rated air volume passes through the solenoid valve 35, the quantitative module 42 transmits the signal to the data processing module 43 through the data transmission serial port;

[0048] The data processing module 43 is used to convert and analyze the signal. After the input module 40, the timing module 41 and the quantitative module 42 transmit the signal to the data processing module 43 through the data transmission serial port, the data processing module 43 analyzes and determines the commands to be executed and sends them out in sequence;

[0049] The output module 44 is used to connect various external actuators. The output module 44 transmits signals to the fan 10, the solenoid valve 35, the motor 25, the micro electric push rod 21, the stepper motor 2 and the electric push rod 2 31 through the external data transmission serial port to control them to start and stop in sequence.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic purging device for a heating furnace inlet area, comprising a box (3), characterized in that: The box (3) is fixedly connected to a dust collecting bin (1) on both sides, a fan (10) is fixedly connected to one side of the middle of the front wall of the box (3), an air intake pipe (12) is fixedly connected to the bottom wall of the fan (10), a solenoid valve (35) is arranged on the periphery of the middle of the air intake pipe (12), a rear wall of the solenoid valve (35) is fixedly connected to one side of the lower part of the front wall of the box (3), an end of the air intake pipe (12) away from the fan (10) passes through the bottom of the front wall of the box (3), an annular air pipe (20) is arranged on the bottom of the inner wall of the box (3), the annular air pipe (20) is in communication with the air intake pipe (12), and evenly distributed air intake pipes (20) are arranged on the periphery of both sides of the annular air pipe (20). A plurality of branch control valves (18) are provided, the top walls of the branch control valves (18) are all connected to hoses (9), the ends of the hoses (9) away from the branch control valves (18) are all connected to a blower head (16), a fixed block (19) is fixedly connected to the middle of the bottom wall of the box body (3), a plurality of evenly distributed weighing sensors (23) are fixedly connected to the middle of the top wall of the fixed block (19), the top walls of the weighing sensors (23) are all fixedly connected to the bottom end of the load-bearing plate (4), a plurality of evenly distributed weighing sensors (1) are fixedly connected to the middle of the top end of the load-bearing plate (4), the top ends of the weighing sensors (1) are all fixedly connected to the bottom wall of the weighing body (6).

2. The automatic purging device for the process of heating furnace inlet area according to claim 1 is characterized by: A plurality of evenly distributed fixed boxes (17) are fixedly connected inside one side of the fixed block (19) and on the other side of the top wall; a motor (25) is fixedly connected to the top wall of the fixed box (17); an output end of the motor (25) passes through the fixed box (17) and is fixedly connected to a fixed cylinder (29); a support frame (28) is rotatably connected inside the fixed cylinder (29); a support cylinder (24) is provided outside the output end of the motor (25); and a bottom wall of the support cylinder (24) is fixedly connected to the top of the fixed box (17). The outer circumference of the support tube (24) is slidably connected to a slip ring (26), the outer circumference of the slip ring (26) is fixedly connected to a fixing plate (22), the bottom end of the fixing plate (22) away from the slip ring (26) is fixedly connected to a micro electric push rod (21), the bottom end of the micro electric push rod (21) is fixedly connected to the outer side of the top wall of the fixing box (17), one end of the support frame (28) is slidably connected to the upper part of the inner wall of the slip ring (26), and the other end of the support frame (28) is fixedly connected to the bottom wall of the hair dryer head (16).

3. The automatic purging device for the process of heating furnace inlet area according to claim 1 is characterized in that: A connecting tube (13) is provided on the outer periphery of the annular air pipe (20) at the rear, and a through groove (39) is provided on the outer periphery of the connecting tube (13). One side of the through groove (39) is in communication with the annular air pipe (20), and an arc-shaped cover plate (14) is slidably connected to the outer side of the through groove (39). A slide plate (27) is rotatably connected to the lower part of one side of the arc-shaped cover plate (14), and an end of the slide plate (27) away from the arc-shaped cover plate (14) is slidably connected to a support block (15), and a bottom wall of the support block (15) is fixedly connected to the rear part of the inner bottom wall of the box body (3).

4. The automatic purging device for the process of heating furnace inlet area according to claim 1 is characterized in that: The front and rear parts of the side walls on both sides of the box body (3) are fixedly connected to stepper motors (2); the output ends of the stepper motors (2) penetrate the box body (3) and are fixedly connected to gears (7); the gears (7) are meshed with the front and rear ends of the toothed plates (8); the front and rear parts of the toothed plates (8) away from one end are slidably connected to the front and rear parts of the side walls on both sides of the box body (3) via T-shaped slide blocks.

5. The automatic purging device for the process of heating furnace inlet area according to claim 1 is characterized in that: The inner wall of the dust collecting bin (1) is fixedly connected to a side away from the box body (3), and the opposite end of the electric push rod (31) is fixedly connected to an electrostatic dust removal plate (30). The bottom of the electrostatic dust removal plate (30) is fixedly connected to an L-shaped support plate (32). The bottom end of the L-shaped support plate (32) is slidably connected to a limit plate (33). Both ends of the limit plate (33) are fixedly connected to the middle of the side walls on both sides of the dust collecting bin (1). The front and rear parts of the inner bottom wall of the dust collecting bin (1) are fixedly connected to an inclined plate (34), and the middle part of the inner bottom wall of the dust collecting bin (1) is slidably connected to a collection box (11).

6. The automatic purging device for the process of heating furnace inlet area according to claim 1 is characterized in that: A control box (36) is fixedly connected to the rear wall of the box body (3), heat dissipation grooves (38) are provided on both side walls of the control box (36), and a PLC host (37) is fixedly connected to the middle of the inner bottom wall of the control box (36).

7. A system for automatic purging of a process scale in a heating furnace inlet area according to claim 6, characterized in that: The invention comprises an input module (40), a timing module (41), a quantitative module (42), a data processing module (43) and an output module (44); the input module (40), the timing module (41), the quantitative module (42), the data processing module (43) and the output module (44) are all implemented based on a PLC host (37); the input module (40) is connected to the data processing module (43); the data processing module (43) is connected to the timing module (41) and the quantitative module (42); the data processing module (43) is connected to the output module (44); wherein: The input module (40) is used to control the weighing sensor 1 (5) and the weighing sensor 2 (23). After the weighing is completed, the weighing sensor 1 (5) and the weighing sensor 2 (23) transmit the weighing signal detected on site to the input module (40) through the data transmission serial port. After receiving the signal, the input module (40) transmits the signal to the data processing module (43) through the data transmission serial port. A timing module (41) is used to control the working time of the fan (10). The timing module (41) can calculate the remaining working time. When the countdown ends, the timing module (41) transmits a signal to the data processing module (43) through the data transmission serial port. A quantitative module (42) is used to control the opening and closing of the solenoid valve (35). The quantitative module (42) calculates the time and the air flow rate, and when the rated air volume passes through the solenoid valve (35), transmits the signal to the data processing module (43) through the data transmission serial port; The data processing module (43) is used to convert and analyze the signal. After the input module (40), the timing module (41) and the quantitative module (42) transmit the signal to the data processing module (43) through the data transmission serial port, the data processing module (43) determines the commands to be executed through analysis and issues them in sequence. The output module (44) is used to connect various external actuators. The output module (44) transmits signals to the fan (10), the solenoid valve (35), the motor (25), the micro electric push rod (21), the stepper motor (2) and the second electric push rod (31) respectively through the external data transmission serial port, thereby controlling them to start and stop in sequence.

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