CN112092239A - Drying control system, method and device for natural rubber - Google Patents
Drying control system, method and device for natural rubber Download PDFInfo
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- CN112092239A CN112092239A CN202010788093.4A CN202010788093A CN112092239A CN 112092239 A CN112092239 A CN 112092239A CN 202010788093 A CN202010788093 A CN 202010788093A CN 112092239 A CN112092239 A CN 112092239A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
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Abstract
The invention belongs to the technical field of automatic control, and discloses a drying control system, method and device for natural rubber. The invention starts through frequency conversion, has low energy consumption and small torque, and can greatly prolong the service life of the fan; by applying a configuration technology, the working state of the equipment can be monitored on the display screen at any time, and the drying effect is judged from data; through the visual configuration monitoring interface, the working state of the production line is monitored constantly, the hidden trouble of the fault can be found in time, and the fault can be processed in time before the fault does not occur. The PLC technology, the frequency conversion technology and the configuration technology are combined for the first time, so that the control technology of the rubber making process of the natural rubber is one step, and the method has originality, novelty and advancement; the frequency conversion technology changes the damage of the hard start of the high-power motor to the machine, and reduces the maintenance cost and the secondary investment cost.
Description
Technical Field
The invention belongs to the technical field of automatic control, and particularly relates to a drying control system, method and device for natural rubber.
Background
Currently, the closest prior art: the control system of the existing 4.0t/h standard rubber shallow drying production line in Hainan has a production line with 33 parking spaces, 2 fans with 75kW are used for supplying air and drying, 1 fan with 30kW is used for dehumidifying, and 1 fan with 18.5kW is used for cooling. However, with the development of automation, integration and scale of industry, the PLC and the frequency conversion control technology have been rapidly developed, and the configuration technology has been gradually applied in various fields. The traditional control system gradually chops and protrudes the disadvantages: 1. the autotransformer is started, and an overlarge starting torque causes mechanical trauma and an overlarge starting current, so that the damage of an electric element is caused, and overlarge electric energy consumption causes overlarge economic loss, and the management cost and the maintenance cost are greatly increased; the larger the scale is, the investment cost is multiplied, the operation failure rate is high, and the overhaul is complex; 2. the baking temperature is ensured to have great human instability factors by the great judgment of experience, and reliable scientific data cannot be obtained to ensure the continuity of the industry development; 3. for a long time, the occurrence of a fault is always discovered after economic losses occur; 4. in the process of processing natural rubber in the past year, no matter the produced high-quality or low-quality rubber products, the data of the operating condition of the production line is not recorded and stored specifically.
In summary, the problems of the prior art are as follows:
(1) the traditional control system adopts a hard starting mode, large torque and high energy consumption are generated, and the management cost and the maintenance cost are greatly increased;
(2) the baking temperature is ensured to have great human instability factors by the great judgment of experience, and reliable scientific data cannot be obtained to ensure the continuity of the industry development;
(3) the hidden trouble of the fault cannot be found in time, which causes excessive economic loss;
(4) the long-term reliable working data of the production line in the processing process can not be stored.
The difficulty of solving the technical problems is as follows: the Hainan natural rubber group is integrated from more than 100 natural rubber processing companies into 8-size natural rubber processing companies, so that the number of manufacturers is reduced, the scale is increased, the total daily yield is increased, and centralized management is realized. The motor used in the existing production line also has the capacity increased from the small capacity, the traditional control system has larger scale, the investment cost is increased by times, the operation failure rate is very high, and the overhaul is complex.
The significance of solving the technical problems is as follows: a set of superior novel control system is developed in time, is necessary for improving the processing quality of the natural rubber, and has profound significance for the primary processing industry of the natural rubber.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a drying control system for natural rubber.
The invention is realized in such a way that a drying control system of natural rubber comprises:
the electrical control circuit design module is used for designing an electrical schematic diagram, an electrical element layout diagram and an electrical wiring diagram of peripheral electrical elements of the PLC and selecting technical parameters of all the electrical elements;
the PLC program design module comprises an I/O address allocation table listing, a PLC control program designing and compiling, an off-line debugging and an on-line debugging of the PLC control program, a communication between the PLC and a computer, a communication between the PLC and a frequency converter, an on-line monitoring result and a program modification;
the configuration design module of the monitoring interface comprises a visual interface design module, a configuration connection module between the touch screen and the PLC module;
the frequency converter control module comprises communication between the PLC and the frequency converter, frequency converter parameter setting and operation mode setting;
the temperature control system module is realized by analog-to-digital conversion of A/D, the temperature change is realized by a sensor, and the control is realized by converting analog quantity into digital quantity.
Another object of the present invention is to provide a drying control method of natural rubber which operates the drying control system of natural rubber, the drying control method of natural rubber including the steps of:
electrifying, initializing, judging whether each electrical element is successfully initialized or not, if so, carrying out the next step, and if not, returning to continue initializing;
if the starting frequency is zero, executing the operation of the frequency converter if the starting frequency is zero, and returning to the parameter setting of the frequency converter if the starting frequency is not zero;
clicking a starting button on the touch screen, and starting the heat generator and the frequency converter under the control of the PLC;
the heat sensor collects the temperature of the ventilation pipeline at any time and transmits the temperature to the A/D digital-to-analog converter to realize the heat increasing and heat reducing control of the PLC on the heat generator and the start and stop control of the PLC on the frequency converter;
starting the dehumidifying fan, automatically switching to a power frequency power supply, finishing variable frequency starting if the switching is successful, and working frequency of the dehumidifying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the dehumidifying fan is restarted;
after the dehumidifying fan is automatically switched to a power frequency power supply, starting the drying fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the drying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the drying fan is restarted;
after the drying fan is automatically switched to a power frequency power supply, starting the cooling fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the cooling fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the cooling fan is restarted.
Another object of the present invention is to provide a drying control device for natural rubber equipped with the drying control system for natural rubber, the drying control device for natural rubber comprising: the system comprises a power line, a first circuit breaker, a frequency converter, a circuit breaker system, a first contactor system, a second contactor system, a fan control system, a speed measurement sensor control system, a PLC (programmable logic controller), a touch screen, an A/D (analog/digital) converter, a temperature sensor and a heat generator;
the circuit breaker system includes: a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker; the circuit breaker system comprises a third circuit breaker, a fourth circuit breaker and a fifth circuit breaker;
the first contactor system includes: a first contactor, a second contactor, a third contactor;
the second contactor system includes: a fourth contactor, a fifth contactor, a sixth contactor;
the fan control system includes: a dehumidifying fan, a drying fan and a cooling fan;
the speed sensor control system includes: the system comprises a first speed measuring sensor, a second speed measuring sensor and a third speed measuring sensor;
the upper part of the first circuit breaker is connected with a power line, and the lower part of the first circuit breaker is connected with the second circuit breaker, the frequency converter and the PLC; the upper position of the third circuit breaker is connected with the first circuit breaker, and the lower position of the third circuit breaker is connected with the first contactor; the upper position of the fourth circuit breaker is connected with the first circuit breaker, and the lower position of the fourth circuit breaker is connected with the second contactor; the upper position of the fifth circuit breaker is connected with the first circuit breaker, and the lower position of the fifth circuit breaker is connected with the third contactor; the upper part of the first contactor is connected with a third circuit breaker, and the lower side of the first contactor is connected with a dehumidifying fan; the upper part of the second contactor is connected with a fourth circuit breaker, and the lower side of the second contactor is connected with a drying fan; the upper part of the third contactor is connected with a fifth circuit breaker, and the lower side of the third contactor is connected with a cooling fan; the upper position of the dehumidifying fan is connected with the first contactor, and the lower position of the dehumidifying fan is connected with the first speed measuring sensor; the upper part of the first speed measuring sensor is connected with the dehumidifying fan, and the lower part of the first speed measuring sensor is connected with the PLC; the upper position of the drying fan is connected with the second contactor, and the lower position of the drying fan is connected with the second speed measuring sensor; the upper position of the second speed measuring sensor is connected with the drying fan, and the lower position of the second speed measuring sensor is connected with the PLC; the upper position of the cooling fan is connected with a third contactor, and the lower position of the cooling fan is connected with a third speed measuring sensor; the upper position of the third speed measuring sensor is connected with the cooling fan, and the lower position of the third speed measuring sensor is connected with the PLC; the upper part of the frequency converter is connected with the first circuit breaker and the PLC controller, and the lower part of the frequency converter is connected with the fourth contactor, the fifth contactor and the sixth contactor; the upper position of the fourth contactor is connected with a frequency converter, and the lower position of the fourth contactor is connected with a dehumidifying fan; the upper position of the fifth contactor is connected with a frequency converter, and the lower position of the fifth contactor is connected with a drying fan; the upper position of the sixth contactor is connected with the frequency converter, and the lower position of the sixth contactor is connected with the cooling fan; the PLC controller is connected with a first circuit breaker, a touch screen, an A/D digital-to-analog converter, a first speed measurement sensor, a second speed measurement sensor and a third speed measurement sensor at the upper part, and is connected with a frequency converter, the touch screen, a heat generator, a first contactor, a second contactor, a third contactor, a contactor and a contactor at the lower part; the touch screen is a terminal display, the upper element is a PLC (programmable logic controller) lower element and is also a PLC controller, and the upper element and the PLC controller mutually transmit data; the heat generator is an element for generating heat, the upper part is connected with the PLC, and the lower part is connected with the ventilation pipeline; the upper part of the A/D digital-to-analog converter is connected with a temperature sensor, and the lower part of the A/D digital-to-analog converter is connected with a PLC (programmable logic controller); the temperature sensors are arranged on the upper cavities of the third and fourth positions of the dehumidifying section, the upper cavities of the drying section are respectively arranged, the temperature data of the dehumidifying section and the drying section are collected and transmitted to the lower connecting A/D converter.
The invention also aims to provide a drying cabinet carrying the drying control system of the natural rubber, wherein a top cover of the drying cabinet is arranged at the top of the drying cabinet, a ventilation upper cavity is arranged at the upper part of the drying cabinet, an upper partition sealing plate and an adjustable upper partition are arranged in the ventilation upper cavity, a ventilation lower cavity is arranged at the lower part of the drying cabinet, and a lower partition sealing plate is arranged in the ventilation lower cavity; the right end of the upper part of the drying cabinet is provided with an upper inlet sealing plate, and the left end of the upper part of the drying cabinet is provided with an upper outlet sealing plate; the right end of the lower part of the drying cabinet is provided with a lower inlet sealing plate, and the left end of the lower part of the drying cabinet is provided with a lower outlet sealing plate; the bottom of the drying cabinet is connected with a dehumidifying fan through a conduit.
Furthermore, the upper part of the top cover of the drying cabinet is fixedly communicated with three ventilating ducts, the middle parts of the two ventilating ducts are respectively provided with a cooling fan and a drying fan, and the other ventilating duct is provided with an air supplementing opening; the upper parts of the three ventilation pipelines are communicated with a main ventilation pipeline, and the middle part of the main ventilation pipeline is provided with a heat energy generator and an adjustable air valve.
Further, a drying vehicle track is arranged on the lower portion of the drying cabinet, an inner drying cabinet track and an outer drying cabinet track are arranged on the drying vehicle track, the inner track and the outer track form an annular closed track, a drying vehicle is arranged on the drying vehicle track, wheels are arranged on the lower portion of the drying vehicle, and the wheels are placed on the upper portion of the drying vehicle track.
Further, the drying vehicle is provided with a box body, a screen-shaped box bottom plate is fixed on the lower portion of the box body, wheels are arranged on the lower portion of the screen-shaped box bottom plate, and front and rear sealing strips and anti-collision strips are fixed on two sides of the box body.
Further, a left sealing strip and a right sealing strip are arranged between the drying vehicle and the drying cabinet, and an upper sealing strip and a lower sealing strip are arranged on the lower portions of the left sealing strip and the right sealing strip.
Furthermore, an automatic cart pushing device is fixed at the right end of the drying cabinet and arranged between the drying vehicle tracks.
Another object of the present invention is to provide a method for controlling the drying cabinet, including: the interior of the drying cabinet is divided into four sections: the second, third and fourth parking spaces are dehumidifying sections, the fifth and sixth parking spaces are drying sections 1, the seventh and eighth parking spaces are drying sections 2, and the ninth and tenth parking spaces are cooling sections.
Electrifying, initializing the system, and then waiting; the automatic material system of the upper process link loads the wet-drenched natural rubber particles conveyed by the granulation production line into a drying vehicle, and continuously pushes the first three natural rubber particles into a drying cabinet in a manual mode through a cart device; meanwhile, the five, six, seven, eight, nine and ten parking spaces are occupied by the empty drying vehicle, a starting button is pressed on a touch screen, a heat generator and a frequency converter are started, and a dehumidifying fan, a drying fan and a cooling fan are sequentially started under the control of an automatic control system;
the process that the frequency converter starts the dehumidifying fan firstly is as follows: under the action of the PLC, the first contactor is powered on and closed, the frequency converter is started, when the starting frequency reaches 50HZ, the first contactor is powered on and closed, the fourth contactor is powered off and disconnected, the frequency converter stops running, and the dehumidifying fan enters 50HZ power frequency operation after being started; repeating the steps, and starting the drying fan and the cooling fan in sequence;
when the temperature of the drying sections 1 and 2 reaches 100 ℃, the cart device is switched to an automatic cart pushing mode for pushing one drying cart every 6.5 minutes, and the normal operation is started after the start operation is finished;
in normal working condition, the dehumidifying section removes water in the granular glue to dry and preheat the colloidal particles, the temperature range is set to 70-90 ℃, and the upper and lower floating ranges are-5- +5 ℃;
the temperature sensor is arranged on the upper cavities of the moisture extraction section and the drying section to acquire temperature data when in use, the temperature sensor transmits acquired temperature analog quantity to the A/D digital-to-analog converter, and the A/D digital-to-analog converter converts the analog quantity into digital quantity and then transmits the digital quantity to the PLC; the PLC controller transmits the digital signal to a touch screen configuration chart for displaying and storing, determines whether the heat generator heats or reduces heat according to the temperature, and controls a servo system of the heat generator to ensure that the heat generator does not heat when the actual temperature is consistent with the set temperature and the drying cabinet is kept at a relative constant temperature of-5 to +5 vertical floating of the set temperature; under the action of a PLC, the drying section dries and dries the colloidal particles thoroughly, when the temperature reaches the set temperature, the temperature range is set to be 110-125 ℃, the up-down floating range is-5- +5 ℃, and the system control process is the same as that of the dehumidifying section; the cooling section is used for cooling the high-temperature baked colloidal particles to normal temperature, and all heat in the cooling process is conveyed to the drying section through an air duct.
In summary, the advantages and positive effects of the invention are: the invention realizes soft start of the fan through variable frequency start, has low energy consumption and small torque, and can greatly prolong the service life of the fan; by applying the configuration technology, dynamic temperature and humidity data in the drying line can be displayed on a display screen at any time, and corresponding temperature and humidity adjustment can be carried out, and the conditions of current and voltage of the motor can be monitored at any time and can be correspondingly adjusted; through a visual configuration monitoring interface, the hidden trouble of the fault can be found in time and processed in time before the fault does not occur; the automatic equipment replaces manual operation, so that the safety is improved, the productivity is improved, the labor load is reduced, the continuity of the upper link and the lower link of the rubber processing technology is realized, and the automatic production is realized.
The invention combines the PLC technology, the frequency conversion technology and the configuration technology for the first time, so that the control technology of the rubber making process of the natural rubber is stepped, and the invention has originality, novelty and advancement; the frequency conversion technology changes the damage of the hard start of the high-power motor to the machine, and reduces the maintenance cost and the secondary investment cost; the equipment system has strong reliability and scientific and complete data collection, and a visual monitoring interface is adopted to monitor the working state of the equipment at any time, timely process and analyze the failure reasons to be generated, and provide production practice data for equipment maintenance and modification.
The invention is a set of brand new PLC controller, frequency conversion and configuration technology control system which is researched and developed on the basis of successfully developing a PLC controller frequency conversion control system by Yangzhou of a teacher of the Hainan science and technology profession, is used for a drying production line, and has the advantages that: (1) through frequency conversion starting, the fan realizes soft starting, the energy consumption is low, the torque is small, and the service life of the fan can be greatly prolonged; (2) by applying the configuration technology, dynamic temperature and humidity data in the drying line can be displayed on a display screen at any time, and corresponding temperature and humidity adjustment can be carried out, and the conditions of current and voltage of the motor can be monitored at any time and can be correspondingly adjusted; (3) through a visual configuration monitoring interface, the hidden trouble of the fault can be found in time and processed in time before the fault does not occur; (4) the automatic equipment replaces manual operation, so that the safety is improved, the productivity is improved, the labor load is reduced, the continuity of the upper link and the lower link of the rubber processing technology is realized, and the automatic production is realized.
Drawings
Fig. 1 is a schematic structural diagram of a natural rubber drying control system according to an embodiment of the present invention.
FIG. 2 is a flow chart of a drying control method for natural rubber according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a drying control system for natural rubber according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a drying cabinet provided by an embodiment of the invention;
FIG. 5 is a schematic structural view of a left-right sealing strip, an upper sealing strip and a lower sealing strip provided in the embodiment of the present invention;
FIG. 6 is a schematic structural view of a mesh box bottom plate provided by an embodiment of the invention;
in the figure: 1. a power line; 2. a first circuit breaker; 3. a frequency converter; 4. a circuit breaker system; 4-1, a second circuit breaker; 4-2, a third circuit breaker; 4-3, a fourth circuit breaker; 5. a first contactor system; 5-1, a first contactor; 5-2, a second contactor; 5-3, a third contactor; 6. a second contactor system; 6-1, a fourth contactor; 6-2, a fifth contactor; 6-3, a sixth contactor; 7. a fan control system; 7-1, a dehumidifying fan; 7-2, drying a fan; 7-3, a cooling fan; 8. a speed measurement sensor control system; 8-1, a first speed measuring sensor; 8-2, a second speed measuring sensor; 8-3, a third speed measurement sensor; 9. a PLC controller; 10. touching a mould screen; 11. an A/D analog-to-digital converter; 12. a temperature sensor; 13. a heat generator; 14. an automatic cart device; 15. drying vehicle; 16. an upper inlet seal plate; 17. a ventilated upper chamber; 18. an adjustable upper partition; 19. A top cover of the drying cabinet; 20. a ventilation duct; 21. an upper partition sealing plate; 22. an adjustable air valve; 23. an air supply opening; 24. a thermal energy generator; 25. a drying fan; 26. a cooling fan; 27. an outlet upper sealing plate; 28. Front and rear sealing strips; 29. front and rear bumper strips; 30. an outlet lower seal plate; 31. a lower partition sealing plate; 32. Drying the wheel; 33. a lower ventilation cavity; 34. drying the vehicle track; 35. a moisture extraction fan; 36. an inlet lower seal plate; 37. left and right sealing strips; 38. an upper sealing strip and a lower sealing strip; 39. a box body; 40. a net-shaped box bottom plate; 41. an electrical control circuit design module; 42. a PLC programming module; 43. a configuration design module of the monitoring interface; 44. A frequency converter control module; 45. and a temperature control system module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a drying control system for natural rubber provided in an embodiment of the present invention includes: an electric control circuit design module 41, a PLC program design module 42, a configuration design module 43 of a monitoring interface, a frequency converter control module 44 and a temperature control system module 45.
The electrical control circuit design module 41 is used for designing an electrical schematic diagram, an electrical element layout diagram and an electrical wiring diagram of peripheral electrical elements of the PLC, and selecting technical parameters of all the electrical elements;
a PLC program design module 42, which comprises I/O address allocation table listing, PLC control program design and writing (ladder diagram), off-line debugging and on-line debugging of the PLC control program, communication between the PLC and a computer, communication between the PLC and a frequency converter, on-line monitoring result and program modification;
a configuration design module 43 for monitoring the interface, wherein the interface configuration is a very important link, and comprises the design of a visual interface and the configuration connection between a touch screen and a PLC;
the frequency converter control module 44 controls the working state of the frequency converter, so that the design content comprises communication between the PLC and the frequency converter, frequency converter parameter setting, operation mode setting and the like;
the temperature control system module 45 is realized by an A/D digital-to-analog converter 11, the temperature change is realized by a sensor, and the temperature change is controlled by converting an analog quantity into a digital quantity.
As shown in fig. 2, the drying control method of natural rubber provided by the present invention comprises the following steps:
electrifying, initializing, judging whether each electrical element is successfully initialized or not, if so, carrying out the next step, and if not, returning to continue initializing;
if the starting frequency is zero, executing the operation of the frequency converter if the starting frequency is zero, and returning to the parameter setting of the frequency converter if the starting frequency is not zero; the touch screen, the PLC, the heat generator, the A/D and the heat sensor execute frequency converter operation;
starting the dehumidifying fan, automatically switching to a power frequency power supply, finishing variable frequency starting if the switching is successful, and working frequency of the dehumidifying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the dehumidifying fan is restarted;
after the dehumidifying fan is automatically switched to a power frequency power supply, starting the drying fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the drying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the drying fan is restarted;
after the drying fan is automatically switched to a power frequency power supply, starting the cooling fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the cooling fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the cooling fan is restarted.
As shown in fig. 3, the drying control system for natural rubber provided in the embodiment of the present invention includes: the system comprises a power line 1, a first circuit breaker 2, a frequency converter 3, a circuit breaker system 4, a first contactor system 5 and a second contactor system; 6. The device comprises a fan control system 7, a speed measurement sensor control system 8, a PLC (programmable logic controller) 9, a touch screen 10, an A/D (analog/digital) digital-to-analog converter 11, a temperature sensor 12 and a heat generator 13.
The circuit breaker system 4 includes: a third circuit breaker 4-1, a fourth circuit breaker 4-2, a fifth circuit breaker 4-3.
The first contactor system 5 includes: a first contactor 5-1, a second contactor 5-2 and a third contactor 5-3.
The second contactor system 6 includes: a fourth contactor 6-1, a fifth contactor 6-2, and a sixth contactor 6-3.
The fan control system 7 includes: a dehumidifying fan 7-1, a drying fan 7-2 and a cooling fan 7-3.
The speed sensor control system 8 includes: a first speed measuring sensor 8-1, a second speed measuring sensor 8-2 and a third speed measuring sensor 8-3.
The upper part of the first circuit breaker 2 is connected with a power line 1, and the lower part thereof is connected with a circuit breaker system 4 (comprising a third circuit breaker 4-1, a fourth circuit breaker 4-2 and a fifth circuit breaker 4-3), a frequency converter 3 and a PLC (programmable logic controller) 9; the upper position of the third circuit breaker 4-1 is connected with the first circuit breaker 2, and the lower position is connected with the first contactor 5-1; the upper position of the fourth circuit breaker 4-2 is connected with the first circuit breaker 2, and the lower position is connected with the second contactor 5-2; the upper position of the fifth circuit breaker 4-3 is connected with the first circuit breaker 2, and the lower position is connected with the third contactor 5-3; the upper position of the first contactor 5-1 is connected with a third circuit breaker 4-1, and the lower position side is connected with a dehumidifying fan 7-1; the upper position of the second contactor 5-2 is connected with a fourth circuit breaker 4-2, and the lower position side is connected with a drying fan 7-2; the upper position of the third contactor 5-3 is connected with a fifth circuit breaker 4-3, and the lower position side is connected with a cooling fan 7-3; the upper position of the dehumidifying fan 7-1 is connected with the first contactor 5-1, and the lower position is connected with the first speed measuring sensor 8-1; the upper part of the first speed measuring sensor 8-1 is connected with the dehumidifying fan 7-1, and the lower part is connected with the PLC 9; the upper position of the drying fan 7-2 is connected with the second contactor 5-2, and the lower position is connected with the second speed measuring sensor 8-2; the upper position of the second speed measuring sensor 8-2 is connected with the drying fan 7-2, and the lower position is connected with the PLC 9; the upper position of the cooling fan 7-3 is connected with the third contactor 5-3, and the lower position is connected with the third speed measuring sensor 8-3; the upper position of the third speed measuring sensor 8-3 is connected with the cooling fan 7-3, and the lower position is connected with the PLC 9; the upper position of the frequency converter 3 is connected with the first circuit breaker 2 and the PLC controller 9, and the lower position is connected with the fourth contactor 6-1, the fifth contactor 6-2 and the sixth contactor 6-3; the upper position of the fourth contactor 6-1 is connected with the frequency converter 3, and the lower position is connected with the dehumidifying fan 7-1; the upper position of the fifth contactor 6-2 is connected with the frequency converter 3, and the lower position is connected with the drying fan 7-2; the upper position of the sixth contactor 6-3 is connected with the frequency converter 3, and the lower position is connected with the cooling fan 7-3; the PLC 9 is connected with a first breaker 2, a touch screen 10, an A/D digital-to-analog converter 11, a first speed measuring sensor 8-1, a second speed measuring sensor 8-2 and a third speed measuring sensor 8-3 at the upper position, and is connected with a frequency converter 3, a touch screen 10, a heat generator 13, a first contactor 5-1, a second contactor 5-2, a third contactor 5-3, a contactor 6-1, a contactor 6-2 and a contactor 6-3 at the lower position; the touch screen 10 is a terminal display, the upper element is a PLC 9, the lower element is also the PLC 9, and the upper element and the PLC transmit data with each other; the heat generator 13 is an element for generating heat, the upper part is connected with the PLC 9, and the lower part is connected with a ventilation pipeline; the A/D digital-to-analog converter 11 is connected with a temperature sensor 12 at the upper part and is connected with a PLC 9 at the lower part; the temperature sensors 12 are arranged on 1 upper cavity of the third and fourth vehicle positions of the dehumidification section, 1 upper cavity of the 2 sections of the drying section 1 is respectively arranged, the temperature data of the dehumidification section and the drying section are collected and transmitted to the lower connection A/D digital-to-analog converter 11; the invention utilizes the frequency conversion technology, the fan is soft started, the energy consumption is low, the torque is small, and the service life of the fan is prolonged; by utilizing the application of a configuration technology, dynamic temperature and humidity data and fan current and voltage in the drying line are displayed on the touch screen at any time and are stored; by utilizing a visual configuration interface, the hidden trouble of the fault can be found in time and processed in time before the fault does not occur; the automatic equipment is used for replacing manual operation, so that the safety is improved, the productivity is improved, the labor load is reduced, the continuity of the upper link and the lower link of the rubber processing technology is realized, and the automatic production is realized.
As shown in fig. 4 to 6, the present invention provides a drying cabinet comprising: the device comprises an automatic cart device 14, a drying cart 15, an upper inlet sealing plate 16, a ventilation upper cavity 17, an adjustable upper partition 18, a drying cabinet top cover 19, a ventilation pipeline 20, an upper partition sealing plate 21, an adjustable air valve 22, an air supplement port 23, a heat energy generator 24, a drying fan 25, a cooling fan 26, an upper outlet sealing plate 27, front and rear sealing strips 28, front and rear anti-collision strips 29, a lower outlet sealing plate 30, a lower partition sealing plate 31, wheels 32, a ventilation lower cavity 33, a rail 34, a dehumidifying fan 35, a lower inlet sealing plate 36, left and right sealing strips 37, upper and lower sealing strips 38, a box body 39 and a net-shaped box bottom plate 40.
A drying cabinet top cover 19 is arranged at the top of the drying cabinet, a ventilation upper cavity 17 is arranged at the upper part of the drying cabinet, an upper partition sealing plate 21 and an adjustable upper partition 18 are arranged in the ventilation upper cavity 17, a ventilation lower cavity 33 is arranged at the lower part of the ventilation upper cavity, and a lower partition sealing plate 31 is arranged in the ventilation lower cavity 33; the right end of the upper part of the drying cabinet is provided with an upper inlet sealing plate 16, and the left end is provided with an upper outlet sealing plate 27; a lower inlet sealing plate 36 is arranged at the right end of the lower part of the drying cabinet, and a lower outlet sealing plate 30 is arranged at the left end of the lower part of the drying cabinet; the bottom of the drying cabinet is connected with a dehumidifying fan 35 through a conduit.
The upper part of the top cover 19 of the drying cabinet is fixedly communicated with three ventilating ducts 20, the middle parts of the two ventilating ducts 20 are respectively provided with a cooling fan 33 and a drying fan 35, and the other ventilating duct 20 is provided with an air supplement opening 23; the upper parts of the three ventilation ducts 20 are communicated with a main ventilation duct 20, and the middle part of the main ventilation duct 20 is provided with a heat energy generator 24 and an adjustable air valve 22.
The lower part of the drying cabinet is provided with a drying vehicle track 34, the drying vehicle track 34 is provided with a drying cabinet inner track 34 and a drying cabinet outer track, the inner track and the outer track form an annular closed track, the drying vehicle track 34 is provided with a drying vehicle 15, the lower part of the drying vehicle 15 is provided with a wheel 32, and the wheel 32 is placed on the upper part of the drying vehicle track 34.
The drying vehicle 15 is provided with a box body 39, a screen-shaped box bottom plate 40 is fixed at the lower part of the box body 39, wheels 32 are arranged at the lower part of the screen-shaped box bottom plate 40, and a front sealing strip 28, a rear sealing strip 28 and an anti-collision strip 29 are fixed at two sides of the box body 39; the drying cart 15 is provided with ten in total.
Left and right sealing strips 37 are arranged between the drying vehicle 15 and the drying cabinet, and upper and lower sealing strips 38 are arranged at the lower parts of the left and right sealing strips 37.
The right end of the drying cabinet is fixed with an automatic cart device 14, and the automatic cart device 14 is arranged between rails 34 of the drying cart 15.
As shown in fig. 4, the drying cabinet is first artificially divided into four sections: the second, third and fourth parking spaces are dehumidifying sections, the fifth and sixth parking spaces are drying sections 1, the seventh and eighth parking spaces are drying sections 2, and the ninth and tenth parking spaces are cooling sections; according to the illustration of fig. 1, the working process is as follows: electrifying (closing all circuit breakers), initializing the system, and then waiting; the automatic material system of the upper process link loads the wet-drenched natural rubber particles conveyed by the granulation production line into a drying vehicle, the first three natural rubber particles are continuously pushed into a drying cabinet in a manual mode through a cart device (meanwhile, five, six, seven, eight, nine, ten and other parking places are occupied by empty drying vehicles), at the moment, a start button is pressed on a touch screen, a heat generator 13 and a frequency converter 3 are started, and a moisture extraction fan 35, a drying fan 25 and a cooling fan 26 are sequentially started under the control of an automatic control system; the process of starting the dehumidifying fan 35 by the frequency converter 3 is as follows: under the action of the PLC, the first contactor 6-1 is powered on and closed, the frequency converter 3 is started, when the starting frequency reaches 50HZ, the first contactor 5-1 is powered on and closed, the fourth contactor 6-1 is powered off and opened, the frequency converter 3 stops running, and the dehumidifying fan 35 enters 50HZ power frequency to work after being started; repeating the above steps, and starting the drying fan 25 and the cooling fan 26 in sequence; when the temperature of the drying sections 1 and 2 reaches 100 ℃, the cart device is switched to an automatic cart mode of pushing one drying cart every 6.5 minutes, and at the moment, the starting operation is finished and the normal operation is started; in normal working condition, the dehumidifying section removes water in the colloidal particles to dry and preheat the colloidal particles, the temperature range is set to 70-90 ℃ (the specific temperature is determined according to the type of the glue, such as 75 ℃ for standard glue and 90 ℃ for miscellaneous glue), and the upper and lower floating ranges are-5- +5 ℃; the temperature sensor 12 is arranged on the upper cavities of the dehumidification section and the drying section to collect temperature data when in use, the temperature sensor 12 transmits collected temperature analog quantity to the A/D digital-to-analog converter 11, the A/D digital-to-analog converter 11 converts the analog quantity into digital quantity and transmits the digital quantity to the PLC 9, then the PLC transmits the digital signal to a touch screen configuration chart for displaying and storing, and determines whether the heat generator 13 is heating or reducing heat according to the temperature, when the actual temperature is consistent with the set temperature, the PLC 9 controls a servo system of the heat generator 13 to ensure that the heat generator 13 is not heated, so that the inside of the drying cabinet is kept at a relative constant temperature of-5- +5 floating of the set temperature; under the action of the PLC 9, the drying section dries and dries the colloidal particles, when the temperature reaches the set temperature, the temperature range is set to be 110-125 ℃ (the specific temperature is determined according to the type of the glue, such as 115 ℃ for the standard glue and 120 ℃ for the miscellaneous glue), the upper and lower floating ranges are-5 to +5 ℃, and the system control process is the same as that of the dehumidifying section; the cooling section is to drop the high temperature to the normal atmospheric temperature of drying by fire ripe micelle, makes things convenient for next process (packing) work, and all heats of cooling process are carried for the drying section through the wind channel to a large amount of energy have been practiced thrift.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A drying control system for natural rubber, characterized in that the drying control system for natural rubber comprises:
the electrical control circuit design module is used for designing an electrical schematic diagram, an electrical element layout diagram and an electrical wiring diagram of peripheral electrical elements of the PLC and selecting technical parameters of all the electrical elements;
the PLC program design module comprises an I/O address allocation table listing, a PLC control program designing and compiling, an off-line debugging and an on-line debugging of the PLC control program, a communication between the PLC and a computer, a communication between the PLC and a frequency converter, an on-line monitoring result and a program modification;
the configuration design module of the monitoring interface comprises a visual interface design module, a configuration connection module between the touch screen and the PLC module;
the frequency converter control module comprises communication between the PLC and the frequency converter, frequency converter parameter setting and operation mode setting;
the temperature control system module is realized by an A/D digital-to-analog converter, the temperature change is realized by a sensor, and the control is carried out by converting analog quantity into digital quantity.
2. A drying control method of natural rubber for operating the drying control system of natural rubber according to claim 1, characterized in that the drying control method of natural rubber comprises the steps of:
electrifying, initializing, judging whether each electrical element is successfully initialized or not, if so, carrying out the next step, and if not, returning to continue initializing;
if the starting frequency is zero, executing the operation of the frequency converter if the starting frequency is zero, and returning to the parameter setting of the frequency converter if the starting frequency is not zero;
clicking a start-stop button on the touch screen, and starting and stopping the heat generator and the frequency converter under the control of the PLC;
the heat sensor collects the temperature of the ventilation pipeline at any time and transmits the temperature to the A/D digital-to-analog converter to realize the heat increasing and heat reducing control of the PLC on the heat generator and the start and stop control of the PLC on the frequency converter;
starting the dehumidifying fan, automatically switching to a power frequency power supply, finishing variable frequency starting if the switching is successful, and working frequency of the dehumidifying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the dehumidifying fan is restarted;
after the dehumidifying fan is automatically switched to a power frequency power supply, starting the drying fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the drying fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the drying fan is restarted;
after the drying fan is automatically switched to a power frequency power supply, starting the cooling fan, automatically switching to the power frequency power supply, if the switching is successful, finishing the variable frequency starting, and working the power frequency of the cooling fan; if the switching is unsuccessful, the switching time is too short, the starting time is adjusted, and the cooling fan is restarted.
3. A drying control device for natural rubber on which the drying control system for natural rubber according to claim 1 is mounted, characterized by comprising: the system comprises a power line, a first circuit breaker, a frequency converter, a circuit breaker system, a first contactor system, a second contactor system, a fan control system, a speed measurement sensor control system, a PLC (programmable logic controller), a touch screen, an A/D (analog/digital) converter, a temperature sensor and a heat generator;
the circuit breaker system includes: a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker; the circuit breaker system comprises a third circuit breaker, a fourth circuit breaker and a fifth circuit breaker;
the first contactor system includes: a first contactor, a second contactor, a third contactor;
the second contactor system includes: a fourth contactor, a fifth contactor, a sixth contactor;
the fan control system includes: a dehumidifying fan, a drying fan and a cooling fan;
the speed sensor control system includes: the system comprises a first speed measuring sensor, a second speed measuring sensor and a third speed measuring sensor;
the upper part of the first circuit breaker is connected with a power line, and the lower part of the first circuit breaker is connected with the second circuit breaker, the frequency converter and the PLC; the upper position of the second circuit breaker is connected with the first circuit breaker, and the lower position of the second circuit breaker is connected with the first contactor; the upper position of the third circuit breaker is connected with the first circuit breaker, and the lower position of the third circuit breaker is connected with the second contactor; the upper position of the fourth circuit breaker is connected with the first circuit breaker, and the lower position of the fourth circuit breaker is connected with the third contactor; the upper part of the first contactor is connected with the second circuit breaker and the PLC, and the lower part of the first contactor is connected with the dehumidifying fan; the upper part of the second contactor is connected with a third circuit breaker and a PLC (programmable logic controller), and the lower part of the second contactor is connected with a drying fan; the upper part of the third contactor is connected with a fourth circuit breaker and a PLC (programmable logic controller), and the lower part of the third contactor is connected with a cooling fan; the upper position of the dehumidifying fan is connected with the first contactor, and the lower position of the dehumidifying fan is connected with the first speed measuring sensor; the upper part of the first speed measuring sensor is connected with the dehumidifying fan, and the lower part of the first speed measuring sensor is connected with the PLC; the upper position of the drying fan is connected with the second contactor, and the lower position of the drying fan is connected with the second speed measuring sensor; the upper position of the second speed measuring sensor is connected with the drying fan, and the lower position of the second speed measuring sensor is connected with the PLC; the upper position of the cooling fan is connected with a third contactor, and the lower position of the cooling fan is connected with a third speed measuring sensor; the upper position of the third speed measuring sensor is connected with the cooling fan, and the lower position of the third speed measuring sensor is connected with the PLC; the upper part of the frequency converter is connected with the first circuit breaker and the PLC, and the lower part of the frequency converter is connected with the fourth contactor, the fifth contactor and the sixth contactor; the upper position of the fourth contactor is connected with the frequency converter and the PLC, and the lower position of the fourth contactor is connected with the dehumidifying fan; the upper position of the fifth contactor is connected with the frequency converter and the PLC, and the lower position of the fifth contactor is connected with the drying fan; the upper position of the sixth contactor is connected with the frequency converter and the PLC, and the lower position of the sixth contactor is connected with the cooling fan; the PLC is connected with a first circuit breaker, a touch screen, an A/D digital-to-analog converter, a first speed measurement sensor, a second speed measurement sensor and a third speed measurement sensor at the upper part, and is connected with a frequency converter, the touch screen, a heat generator, a first contactor, a second contactor and a third contactor at the lower part; the touch screen is a terminal display, the upper element is a PLC (programmable logic controller) lower element and is also a PLC controller, and the upper element and the PLC controller mutually transmit data; the heat generator is an element for generating heat, the upper part is connected with the PLC, and the lower part is connected with the ventilation pipeline; the upper part of the A/D digital-to-analog converter is connected with a temperature sensor, and the lower part of the A/D digital-to-analog converter is connected with a PLC (programmable logic controller); the temperature sensors are arranged on 1 upper cavity of the third and the fourth vehicle positions of the dehumidification section, 1 upper cavity of the drying section is respectively arranged on the upper cavities of the dehumidification section and the drying section, and the temperature data of the dehumidification section and the drying section are collected and transmitted to the lower connection A/D converter.
4. A drying cabinet carrying the drying control system for natural rubber according to claim 1, wherein a top cover of the drying cabinet is arranged at the top of the drying cabinet, a ventilation upper cavity is arranged at the upper part of the drying cabinet, an upper partition sealing plate and an adjustable upper partition are arranged in the ventilation upper cavity, a ventilation lower cavity is arranged at the lower part of the drying cabinet, and a lower partition sealing plate is arranged in the ventilation lower cavity; the right end of the upper part of the drying cabinet is provided with an upper inlet sealing plate, and the left end of the upper part of the drying cabinet is provided with an upper outlet sealing plate; the right end of the lower part of the drying cabinet is provided with a lower inlet sealing plate, and the left end of the lower part of the drying cabinet is provided with a lower outlet sealing plate; the bottom of the drying cabinet is connected with a dehumidifying fan through a conduit.
5. The drying cabinet as claimed in claim 4, wherein the upper part of the top cover of the drying cabinet is fixedly communicated with three ventilation ducts, the middle parts of the two ventilation ducts are respectively provided with a cooling fan and a drying fan, and the other ventilation duct is provided with an air supplement opening; the upper parts of the three ventilation pipelines are communicated with a main ventilation pipeline, and the middle part of the main ventilation pipeline is provided with a heat energy generator and an adjustable air valve.
6. The drying cabinet according to claim 4, wherein the drying cabinet is provided with a drying vehicle rail at a lower portion thereof, the drying vehicle rail is provided with a drying cabinet inner rail and a drying cabinet outer rail, the inner rail and the outer rail form an annular closed rail, the drying vehicle rail is provided with the drying vehicle, the drying vehicle is provided with wheels at a lower portion thereof, and the wheels are placed at an upper portion of the drying vehicle rail.
7. The drying cabinet according to claim 4, wherein the drying cart is provided with a cabinet body, a screen-shaped cabinet bottom plate is fixed on the lower portion of the cabinet body, wheels are arranged on the lower portion of the screen-shaped cabinet bottom plate, and front and rear sealing strips and anti-collision strips are fixed on two sides of the cabinet body.
8. The drying cabinet of claim 4, wherein a left sealing strip and a right sealing strip are arranged between the drying vehicle and the drying cabinet, and an upper sealing strip and a lower sealing strip are arranged at the lower parts of the left sealing strip and the right sealing strip.
9. The drying cabinet of claim 4, wherein an automatic cart device is fixed at the right end of the drying cabinet and arranged between the drying vehicle rails.
10. A method of controlling a drying cabinet according to any one of claims 4 to 9, wherein the method of controlling the drying cabinet comprises: the interior of the drying cabinet is divided into four sections: the second, third and fourth parking spaces are dehumidifying sections, the fifth and sixth parking spaces are drying first sections, the seventh and eighth parking spaces are drying second sections, and the ninth and tenth parking spaces are cooling sections;
electrifying, initializing the system, and then waiting; the automatic material system of the upper process link loads the wet-drenched natural rubber particles conveyed by the granulation production line into a drying vehicle, and continuously pushes the first three natural rubber particles into a drying cabinet in a manual mode through a cart device; meanwhile, the five, six, seven, eight, nine and ten parking spaces are occupied by the empty drying vehicle, a starting button is pressed on a touch screen, a heat generator and a frequency converter are started, and a dehumidifying fan, a drying fan and a cooling fan are sequentially started under the control of an automatic control system;
the frequency converter starts the dehumidifying fan firstly, and the process is as follows: pressing a start button on the touch screen, enabling the first contactor to be powered on and closed under the action of the PLC, starting the frequency converter, enabling the first contactor to be powered on and closed when the start frequency reaches 50HZ, enabling the fourth contactor to be powered off and disconnected, stopping the frequency converter, and enabling the dehumidifying fan to enter 50HZ power frequency to work after the starting is finished; repeating the steps, and starting the drying fan and the cooling fan in sequence;
when the temperature of the drying sections 1 and 2 reaches 100 ℃, the cart device is switched to an automatic cart mode of pushing one drying cart every 6.5 minutes, and the normal operation is started after the start operation is finished;
in normal working condition, the dehumidifying section removes water in the granular glue to dry and preheat the colloidal particles, the temperature range is set to 70-90 ℃, and the upper and lower floating ranges are-5- +5 ℃;
the temperature sensor is arranged on the upper cavities of the moisture extraction section and the drying section to acquire temperature data when in use, the temperature sensor transmits acquired temperature analog quantity to the A/D digital-to-analog converter, and the A/D digital-to-analog converter converts the analog quantity into digital quantity and then transmits the digital quantity to the PLC; the PLC controller transmits the digital signal to a touch screen configuration chart for displaying and storing, determines whether the heat generator heats or reduces heat according to the temperature, and controls a servo system of the heat generator to ensure that the heat generator does not heat when the actual temperature is consistent with the set temperature and the drying cabinet is kept at a relative constant temperature of-5 to +5 ℃ up and down floating of the set temperature; under the action of a PLC (programmable logic controller), drying and baking colloidal particles in a drying section, stopping heat supply by a heat generator when the temperature reaches a set temperature, keeping the temperature at the set temperature, setting the general temperature range to be 110-125 ℃, setting the up-down floating range to be-5 to +5 ℃, and controlling the system in the same process as that of a dehumidifying section; the cooling section is used for cooling the high-temperature baked colloidal particles to normal temperature, and all heat in the cooling process is conveyed to the drying section through an air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788093.4A CN112092239A (en) | 2020-08-07 | 2020-08-07 | Drying control system, method and device for natural rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788093.4A CN112092239A (en) | 2020-08-07 | 2020-08-07 | Drying control system, method and device for natural rubber |
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| CN112092239A true CN112092239A (en) | 2020-12-18 |
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| CN202010788093.4A Pending CN112092239A (en) | 2020-08-07 | 2020-08-07 | Drying control system, method and device for natural rubber |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325724A (en) * | 1998-05-13 | 1999-11-26 | Shikishima:Kk | Manufacture of dried goods and controller used therefor |
| CN103673544A (en) * | 2012-08-31 | 2014-03-26 | 昆山冠益玻璃有限公司 | Tunnel type oven |
| WO2014176793A1 (en) * | 2013-04-28 | 2014-11-06 | Cai Jingpeng | Drying or low-temperature dry distillation method and device for lignite coal or low-metamorphic candle coal |
| CN104819634A (en) * | 2015-04-17 | 2015-08-05 | 邓文华 | Natural rubber drying device |
| CN210892581U (en) * | 2019-08-09 | 2020-06-30 | 山东九鼎新材料有限公司 | Tunnel type hot air drying furnace capable of comprehensively utilizing heat energy |
-
2020
- 2020-08-07 CN CN202010788093.4A patent/CN112092239A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325724A (en) * | 1998-05-13 | 1999-11-26 | Shikishima:Kk | Manufacture of dried goods and controller used therefor |
| CN103673544A (en) * | 2012-08-31 | 2014-03-26 | 昆山冠益玻璃有限公司 | Tunnel type oven |
| WO2014176793A1 (en) * | 2013-04-28 | 2014-11-06 | Cai Jingpeng | Drying or low-temperature dry distillation method and device for lignite coal or low-metamorphic candle coal |
| CN104819634A (en) * | 2015-04-17 | 2015-08-05 | 邓文华 | Natural rubber drying device |
| CN210892581U (en) * | 2019-08-09 | 2020-06-30 | 山东九鼎新材料有限公司 | Tunnel type hot air drying furnace capable of comprehensively utilizing heat energy |
Non-Patent Citations (2)
| Title |
|---|
| 张宏伟等: "《PLC电气控制技术》", 30 September 2018, 中国矿业大学出版社 * |
| 邵欣等: "《PLC与工业机器人应用》", 30 September 2017, 北京航空航天大学出版社 * |
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