Full-automatic baking and cooling all-in-one machine control circuit based on PLC control

Abstract

The utility model relates to a full-automatic baking and cooling all-in-one machine control circuit based on PLC control, which comprises a PLC controller, a frequency converter, a temperature controller, a wind pressure sensor, a temperature sensor and a material level sensor, the input end of the PLC controller is connected with a plurality of key switches, the output end of the PLC controller is connected with a plurality of relays, and the relays are connected with the frequency converter. The PLC is connected with the control ends of the frequency converters through relays, the number of the frequency converters is multiple, and the output ends of the multiple frequency converters are electrically connected with the two circulating fans, the cooling fan, the conveying mesh belt motor, the brush cleaning motor and the lifting mesh belt motor correspondingly; the PLC is connected with the combustors through the relay, the number of the temperature controllers corresponds to the number of the combustors, the temperature controllers are in communication connection with the PLC, and the PLC is provided with an alarm module. According to the utility model, a hardware basis is provided for realizing automatic control of nut baking equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of nut baking equipment, and particularly relates to a control circuit of a full-automatic baking and cooling integrated machine based on PLC control. Background Art

[0002] Nut roasting equipment is composed of a silo, a lifting mechanism, a conveyor belt, a circulating fan, a burner, a combustion chamber and other mechanisms, and is used for nut roasting. The existing roasting equipment control circuit is controlled by relays. During operation, the staff performs the opening and closing operations according to the operating steps, thereby controlling the relay to make the power-consuming parts of the nut roasting equipment work in sequence, thereby completing the nut roasting.

[0003] The existing control circuit and method have the following problems:

[0004] 1. It is impossible to monitor the wind pressure, so the operation is difficult. It is easy for the heat exchange system to be turned on without turning on the circulating fan, resulting in poor heat dissipation and serious deformation of the mechanical structure of the heat exchange system.

[0005] 2. The entire process requires manual control, the work intensity is high, and the production process cannot be effectively monitored.

[0006] 3. It is impossible to monitor the baking time, and it is impossible to accurately calculate the real-time baking speed. It is difficult to ensure consistent baking time and baking temperature, and therefore it is impossible to ensure consistent taste.

[0007] Therefore, a control circuit is urgently needed to realize the automatic operation of the baking equipment. Summary of the invention

[0008] In order to solve the problem that the existing nut roasting equipment cannot be automatically controlled, the utility model proposes a control circuit of a fully automatic roasting and cooling integrated machine based on PLC control, a PLC controller is set to control the wind pressure and heating function through relays and inverters, and the roasting process is monitored through multiple sensors, so as to provide a hardware basis for realizing automatic control of the nut roasting equipment.

[0009] In order to achieve the above-mentioned purpose, the utility model proposes a control circuit of a fully automatic baking and cooling integrated machine based on PLC control, comprising two burners, two circulating fans, a cooling fan, a lifting mesh belt motor, a conveying mesh belt motor and a brush cleaning motor, a main circuit and a control circuit, wherein the main circuit comprises a contactor, and the burner, the circulating fan, the cooling fan, the lifting mesh belt motor, the conveying mesh belt motor and the brush cleaning motor are connected to a power supply through the contactor, and the control circuit comprises a plurality of relays and a plurality of key switches, wherein the key switches are connected to the coils of the relays, and the normally open contacts of the relays are connected to the coils of the contactors, and the control circuit further comprises a PLC controller, a frequency converter, a temperature controller, a wind pressure sensor, a temperature sensor and a material level sensor, wherein the input end of the PLC controller is connected to the plurality of key switches, and the output end of the PLC controller is connected to the plurality of relays, and the PLC controller is connected to the control end of the frequency converter through the relay, and the number of the frequency converters is a plurality, and the output ends of the plurality of frequency converters are respectively electrically connected to the two circulating fans, the cooling fan, the conveying mesh belt motor, the brush cleaning motor and the lifting mesh belt motor;

[0010] The PLC controller is connected to the burner through a relay. There are two temperature controllers corresponding to the burners. The temperature controller is connected to the PLC controller in communication. The output end of the PLC controller is respectively connected to the input end of the temperature controller and the circulating fan connected to the coil of the relay. The coil of the relay is connected in parallel with the input end of the temperature controller.

[0011] There are multiple temperature sensors, and the output ends of the multiple temperature sensors are respectively connected to the temperature controller PLC controller, the PLC controller is provided with an alarm module, and the output ends of the wind pressure sensor and the material level sensor are connected to the PLC controller.

[0012] Furthermore, the circulating fan, cooling fan and conveyor belt motor are all provided with a cooling fan, the cooling fan is connected to a power supply through the contactor, the coil of the contactor is connected to a normally open contact of a relay, and the coil of the relay is connected to a PLC controller;

[0013] The cooling fan and the frequency converter are provided with fuses, the fuses are connected to the coil of the relay, and the normally open contacts of the relay are connected to the PLC controller.

[0014] A cooling fan is set to dissipate heat for the circulation fan, cooling fan and conveyor belt motor. The cooling fan is controlled by a relay to achieve automatic start and stop of the cooling fan. A fuse is set to protect the circuit.

[0015] Furthermore, the key switch includes a start switch, a stop switch, an emergency stop switch, a first burner ignition state switch and a second burner ignition state switch.

[0016] A start switch, a stop switch, an emergency stop switch, a first burner ignition status switch and a second burner ignition status switch are provided to realize human-machine interaction and facilitate operation by staff.

[0017] Furthermore, the temperature controller and the PLC controller are both provided with RS485 serial ports, the temperature controller and the PLC controller are connected through the RS485 serial port communication, and the input end of the temperature controller is connected to the temperature sensor.

[0018] Setting the temperature controller provides the hardware basis for using PID to control the baking temperature.

[0019] Furthermore, the wind pressure sensor includes a wind pressure detection switch, and the wind pressure monitoring switch is arranged in the combustion chamber.

[0020] A wind pressure detection switch is set to detect the wind pressure in the combustion chamber to achieve real-time monitoring of the wind pressure in the combustion chamber.

[0021] Furthermore, the material level sensor includes a first material level sensor and a second material level sensor, wherein the first material level sensor is arranged near the bottom of the hopper, and the second material level sensor is arranged near the upper part of the hopper. The first material level sensor detects the lowest material level, and the second material level sensor detects the highest material level, providing a hardware basis for automatic operation and automatic feeding.

[0022] Furthermore, the alarm module includes a yellow light, a red light, a green light and a buzzer, and the yellow light, the red light, the green light and the buzzer are connected to a power supply through a normally open contact of the relay to form a loop. The alarm module is set to perform light and sound alarms when the device is abnormal.

[0023] Through the above technical solution, the beneficial effects of the utility model are:

[0024] The utility model provides a hardware foundation for the automatic control of a baking and cooling integrated machine. A PLC controller, a frequency converter temperature controller, an air pressure sensor, a temperature sensor and a material level sensor are provided. The wiring of the PLC controller is simple, and an air pressure sensor is provided to detect the air pressure in the combustion chamber. The air pressure in the combustion chamber shows the operation status of the circulating fan. The input end of the temperature controller is connected in parallel with the coil of the relay connected to the circulating fan, and the wind pressure and the heating function are linked to each other. The problem of not turning on the circulating fan after the heat exchange system is turned on is avoided. A temperature sensor is provided to detect the baking temperature, which provides a hardware foundation for using PID to control the temperature, so that the baking time and baking temperature of each batch of materials in the baking and cooling integrated machine under automatic operation are consistent, and the taste of the product after discharging is consistent.

[0025] The PLC controller facilitates communication with the host computer and parameter adjustment, thus enabling the baking and cooling machine to bake a variety of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is one of the circuit diagrams of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0027] Figure 2 This is the second circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0028] Figure 3 This is the third circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0029] Figure 4 This is the fourth circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0030] Figure 5 This is the fifth circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0031] Figure 6 This is the sixth circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0032] Figure 7 This is the seventh circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model;

[0033] Figure 8 This is the eighth circuit diagram of the control circuit of a fully automatic baking and cooling integrated machine based on PLC control in the utility model.

[0034] Figure numbers: 1 is the burner, 2 is the circulation fan, 3 is the cooling fan, 4 is the lifting mesh belt motor, 5 is the conveying mesh belt motor, 6 is the brush cleaning motor, 7 is the RS485 serial port, 8 is the cooling fan, 9 is the buzzer, 10 is the PLC controller, 11 is the frequency converter, 12 is the temperature controller, 13 is the wind pressure sensor, 14 is the temperature sensor, 15 is the material level sensor, and 16 is the alarm module. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] Example 1

[0037] like Figures 1 to 8As shown, a control circuit of a fully automatic baking and cooling integrated machine based on PLC control includes two burners 1, two circulating fans 2, a cooling fan 3, a lifting mesh belt motor 4, a conveying mesh belt motor 5 and a brush cleaning motor 6, a main circuit and a control circuit. The main circuit includes a contactor. The burner 1, the circulating fan 2, the cooling fan 3, the lifting mesh belt motor 4, the conveying mesh belt motor 5 and the brush cleaning motor 6 are connected to a power supply through the contactor. The control circuit includes a plurality of relays and a plurality of key switches. The key switches are connected to the coils of the relays, and the normally open contacts of the relays are connected to the wires of the contactors. The control circuit also includes a PLC controller 10, a frequency converter 11, a temperature controller 12, a wind pressure sensor 13, a temperature sensor 14 and a material level sensor 15. The input end of the PLC controller 10 is connected to a plurality of the key switches, and the output end of the PLC controller 10 is connected to a plurality of the relays. The PLC controller 10 is connected to the control end of the frequency converter 11 through the relay. The frequency converter 11 is multiple in number, and the output ends of the multiple frequency converters 11 are electrically connected to two circulating fans 2, a cooling fan 3, a conveying mesh belt motor 5, a brush cleaning motor 6 and a lifting mesh belt motor 4 respectively.

[0038] The PLC controller 10 is connected to the burner 1 through a relay. There are two temperature controllers 12 corresponding to the burner 1. The temperature controller 12 is connected to the PLC controller 10 for communication. The output end of the PLC controller 10 is respectively connected to the input end of the temperature controller 12 and the circulating fan 2 connected to the coil of the relay. The coil of the relay is connected in parallel with the input end of the temperature controller 12.

[0039] There are multiple temperature sensors 14 , and the output ends of the multiple temperature sensors 14 are respectively connected to the temperature controller 12 and the PLC controller 10 . The PLC controller 10 is provided with an alarm module 16 . The output ends of the wind pressure sensor 13 and the material level sensor 15 are connected to the PLC controller 10 .

[0040] like Figure 1 , 2 As shown in FIG. 4 , the circulating fan 2, the cooling fan 3 and the conveyor belt motor 5 are all provided with a cooling fan 8, the cooling fan 8 is connected to a power supply through the contactor, the coil of the contactor is connected to a normally open contact of a relay, and the coil of the relay is connected to a PLC controller 10;

[0041] The cooling fan 8 and the frequency converter 11 are provided with fuses, the fuses are connected to the coil of the relay, and the normally open contacts of the relay are connected to the PLC controller 10 .

[0042] like Figure 4 As shown, the key switch includes a start switch, a stop switch, an emergency stop switch, a first burner ignition state switch and a second burner ignition state switch.

[0043] like Figure 3 , 5 As shown in 7 , the temperature controller 12 and the PLC controller 10 are both provided with an RS485 serial port 7 , and the temperature controller 12 and the PLC controller 10 are communicatively connected via the RS485 serial port 7 , and the input end of the temperature controller 12 is connected to the temperature sensor 14 .

[0044] like Figure 4 As shown, the wind pressure sensor 13 includes a wind pressure detection switch, and the wind pressure monitoring switch is arranged in the combustion chamber.

[0045] like Figure 4 As shown, the material level sensor 15 includes a first material level sensor and a second material level sensor, wherein the first material level sensor is arranged near the bottom of the hopper, and the second material level sensor is arranged near the top of the hopper.

[0046] like Figure 6 As shown, the alarm module 16 includes a yellow light, a red light, a green light and a buzzer 9, and the yellow light, the red light, the green light and the buzzer 9 are connected to a power source through the normally open contacts of the relay to form a loop.

[0047] Combination Figures 1 to 8 When working, press the start switch SB1 and the system starts working. Figure 5 The PLC controller 10 shown energizes the KA32 relay coil, and then energizes the contactor KM5~KM10 coils, burner 1 is energized, and FV1~FV4 are energized.

[0048] The PLC controller 10 energizes the KA36 relay coil, and then the frequency converter 11FV4 connected to the conveying mesh belt motor 5 works. At the same time, the KA30 relay coil is energized, and then the contactor KM11 is energized, and the lifting mesh belt motor 4 is energized to work. The conveying mesh belt motor 5 works in conjunction with the lifting mesh belt motor 4 to feed the material into the hopper through the transmission belt and the lifting mechanism. During this period, the first material level sensor and the second material level sensor detect the material in the hopper. If the material is lower than the first material level sensor position, the PLC controller 10 controls the conveying mesh belt motor 5 and the lifting mesh belt motor 4 to feed the material. If the material is higher than the second material level sensor position, the PLC controller 10 controls the conveying mesh belt motor 5 and the lifting mesh belt motor 4 to stop feeding the material.

[0049] The PLC controller 10 energizes the relay coils KA33 and KA34, and then FV1 and FV2 work, and the circulating fan 2 works. The two circulating fans 2 are set at one at the air inlet and the other at the air outlet. Figure 4As shown, the first burner ignition state switch and the second burner ignition state switch are both in the open state, and the wind pressure sensor 13 detects the wind pressure in the combustion chamber. The above detection signal is transmitted through the relay to the PLC controller 10 to energize the KA5 and KA12 relays, and the KM9 and KM10 contactors are energized to work, and the two 1 burners start to work. At the same time, the PLC controller 10 energizes the KA42 and KA43 relays, and the two thermostats 12 are energized. The input end of one of the thermostats 12 is connected to the output end of the KA34 relay. When the circulating fan 2 controlled by KA34 works, the two form an associated control. The temperature sensor 14 detects the temperature.

[0050] When the baking work is finished, the PLC controller 10 makes the KA33, KA34, KA5, KA12, KA42 and KA43 relays de-energized and reset, and the corresponding electrical components are de-energized and stop working. The PLC controller 10 makes the KA35 relay coil energized, the KM7 relay energized, FV3 works, and the cooling fan 3 works. The temperature sensor 14 detects the temperature.

[0051] Finally, the PLC controller 10 resets the KA35 relay and the work is completed.

[0052] During operation, the PLC controller 10 controls the yellow light, red light, green light and buzzer 9 to operate. When an abnormality occurs, the PLC controller 10 controls the yellow light, red light and buzzer 9 to operate.

[0053] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A control circuit for a fully automatic baking and cooling integrated machine based on PLC control, comprising two burners (1), two circulating fans (2), a cooling fan (3), a lifting mesh belt motor (4), a conveying mesh belt motor (5) and a brush cleaning motor (6), a main circuit and a control circuit, wherein the main circuit comprises a contactor, the burners (1), the circulating fans (2), the cooling fan (3), the lifting mesh belt motor (4), the conveying mesh belt motor (5) and the brush cleaning motor (6) are connected to a power supply via the contactor, the control circuit comprises a plurality of relays and a plurality of key switches, the key switches are connected to the coils of the relays, and the normally open contacts of the relays are connected to the coils of the contactors, wherein: The control circuit further comprises a PLC controller (10), a frequency converter (11), a temperature controller (12), an air pressure sensor (13), a temperature sensor (14) and a material level sensor (15); the input end of the PLC controller (10) is connected to a plurality of the key switches; the output end of the PLC controller (10) is connected to a plurality of the relays; the PLC controller (10) is connected to a control end of the frequency converter (11) via the relay; the frequency converter (11) is provided in plurality; the output ends of the plurality of frequency converters (11) are respectively electrically connected to two circulation fans (2), a cooling fan (3), a conveying mesh belt motor (5), a brush cleaning motor (6) and a lifting mesh belt motor (4); The PLC controller (10) is connected to the burner (1) via a relay, the number of the temperature controllers (12) corresponding to the burners (1) is two, the temperature controllers (12) are communicatively connected to the PLC controller (10), the output end of the PLC controller (10) is respectively connected to the input end of the temperature controller (12) and the circulating fan (2) connected to the coil of the relay, and the coil of the relay is connected in parallel to the input end of the temperature controller (12); There are a plurality of temperature sensors (14), and the output ends of the plurality of temperature sensors (14) are respectively connected to a temperature controller (12) and a PLC controller (10). The PLC controller (10) is provided with an alarm module (16). The output ends of the wind pressure sensor (13) and the material level sensor (15) are connected to the PLC controller (10).

2. According to the PLC-controlled fully automatic baking and cooling integrated machine control circuit of claim 1, it is characterized in that: The circulation fan (2), the cooling fan (3) and the conveyor belt motor (5) are all provided with a cooling fan (8), the cooling fan (8) is connected to a power supply via the contactor, the coil of the contactor is connected to a normally open contact of a relay, and the coil of the relay is connected to a PLC controller (10); The cooling fan (8) and the frequency converter (11) are provided with fuses, the fuses are connected to the coil of a relay, and the normally open contacts of the relay are connected to a PLC controller (10).

3. The control circuit of a fully automatic baking and cooling integrated machine based on PLC control according to claim 1, characterized in that: The key switches include a start switch, a stop switch, an emergency stop switch, a first burner ignition state switch and a second burner ignition state switch.

4. The control circuit of a fully automatic baking and cooling integrated machine based on PLC control according to claim 1, characterized in that: The temperature controller (12) and the PLC controller (10) are both provided with an RS485 serial port (7). The temperature controller (12) and the PLC controller (10) are communicatively connected via the RS485 serial port (7), and the input end of the temperature controller (12) is connected to the temperature sensor (14).

5. The control circuit of a fully automatic baking and cooling integrated machine based on PLC control according to claim 1, characterized in that: The wind pressure sensor (13) comprises a wind pressure detection switch, and the wind pressure monitoring switch is arranged in the combustion chamber.

6. The control circuit of a fully automatic baking and cooling integrated machine based on PLC control according to claim 1, characterized in that: The material level sensor (15) comprises a first material level sensor and a second material level sensor, wherein the first material level sensor is arranged close to the bottom of the hopper, and the second material level sensor is arranged close to the top of the hopper.

7. The control circuit of a fully automatic baking and cooling integrated machine based on PLC control according to claim 1, characterized in that: The alarm module (16) comprises a yellow light, a red light, a green light and a buzzer (9), and the yellow light, red light, green light and buzzer (9) are connected to a power source via the normally open contacts of the relay to form a loop.

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