CN213338408U - PLC control system of full-automatic steam box - Google Patents
PLC control system of full-automatic steam box Download PDFInfo
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- CN213338408U CN213338408U CN202022113697.7U CN202022113697U CN213338408U CN 213338408 U CN213338408 U CN 213338408U CN 202022113697 U CN202022113697 U CN 202022113697U CN 213338408 U CN213338408 U CN 213338408U
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Abstract
The utility model discloses a PLC control system of full-automatic steam ager, including temperature pressure detection circuit, main control chip, touch-sensitive screen, switching power supply, dry-type heating circuit, soaking heating circuit, heat dissipation circuit and water level control circuit, main control chip is connected with temperature pressure detection circuit, switching power supply, touch-sensitive screen, dry-type heating circuit, soaking heating circuit, heat dissipation circuit and water level control circuit respectively, soaking heating circuit includes first direct current contactor and six soaking heating pipes, and first direct current contactor includes coil KM11 and three group normal open contact KM12, and the one end of coil KM11 is connected with switching power supply output negative pole; the utility model has the advantages that: the functions are abundant, the heater is not easy to damage, and the operability is strong.
Description
Technical Field
The utility model relates to a kitchen heating equipment system field such as boats and ships kitchen, special kitchen, more specifically relates to a PLC control system of full-automatic steam ager.
Background
The rice steaming box is a large kitchen baking device which generates heat by electricity and gas and steams rice. Inside adopts stainless steel steaming tray (stainless steel square dish) as the container, for the convenience removes, installs the universal wheel below the equipment, so the appearance is like the car. The vehicle body is made of stainless steel, and is generally made of 304 stainless steel. The rice steaming vehicle is mainly used for large canteens such as hotels, troops and school factories. The rice steaming vehicle can be used for steaming rice, steamed bread, steamed stuffed bun, pork, chicken, duck and other meat foods, and can also be used for steaming seafood in a special steaming cabinet, and can also be used for stewing soup.
Traditional rice steaming box is through setting for time temperature etc. according to water level information automatic water supply heating, is equipped with pressure, temperature control, and the rice steaming process needs manual control, and protect function is more single, and only a set of heater work, the heater damages easily, lacks dimension guarantor information warning function, can not provide functions such as prefabrication, custom setting, but remote control to sum up prior art rice steaming box function ratio singleness, the heater damages easily, maneuverability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the prior art rice steaming box has the problems of single function, easy damage of the heater and poor operability.
The utility model discloses a following technical means realizes solving above-mentioned technical problem: a PLC control system of a full-automatic steam box comprises a temperature pressure detection circuit, a main control chip, a touch screen, a switch power supply, a dry type heating circuit, a soaking heating circuit, a heat dissipation circuit and a water level control circuit, wherein the main control chip is respectively connected with the temperature pressure detection circuit, the switch power supply, the touch screen, the dry type heating circuit, the soaking heating circuit, the heat dissipation circuit and the water level control circuit, the soaking heating circuit comprises a first direct current contactor and six soaking heating pipes, the first direct current contactor comprises a coil KM11 and three groups of normally open contacts KM12, one end of the coil KM11 is connected with a negative output electrode of the switch power supply, the other end of the coil KM11 is connected with a Q0.3 port of a main control module, the main control module is connected with a positive output electrode of the switch power supply, one ends of the three groups of normally open contacts KM12 are respectively connected with three phases of L1, the six soaking heating pipes form two groups by taking three as a group, one end of each group of soaking heating pipes is respectively connected with the other ends of the three groups of normally open contacts, and the other ends of each group of soaking heating pipes are connected together in parallel.
The utility model discloses temperature pressure detection circuit detects pressure and temperature, and main control chip evaporates the meal according to the setting value of pressure and temperature is automatic, and the touch-sensitive screen shows data such as temperature pressure and sets for temperature pressure time isoparametric through the touch-sensitive screen, and maneuverability is strong, and two kinds of heating methods of water logging heating and dry-type heating simultaneously, and the heating circuit that just soaks sets up two sets of heaters, each other is reserve, duplicate protection to prevent the heater damage, the function is comparatively abundant.
Further, steam ager control circuit still includes switch S1, circuit breaker protector QF and first auxiliary relay, first auxiliary relay includes coil KA11 and two sets of normally open contact KA12, four normally open contacts of circuit breaker protector QF are connected with three phase current L1, L2, L3 and zero line N respectively, and switch S1 'S one end is connected with three phase current' S zero line N, and switch S1 'S the other end is connected with three phase current' S L1 through coil KA11, and two sets of normally open contact KA12 'S one end is connected with three phase current' S zero line N and L1 respectively, and two sets of normally open contact KA12 'S the other end is connected with switching power supply' S input.
Furthermore, the steam box control circuit further comprises a high water level electrode, a low water level electrode and a temperature control switch, the type of the main control chip is CPU ST20, an I0.2 port of the main control chip is connected with the high water level electrode, an I0.0 port of the main control chip is connected with the low water level electrode, an I0.3 port of the main control chip is connected with an L port of the main control chip and a switching power supply output positive electrode through the temperature control switch, and an M port of the main control chip is respectively connected with a switching power supply output negative electrode and an M1 port of the main control chip.
Furthermore, the model of the touch screen is SMART 700IE V3, the positive pole of the touch screen is connected with the positive pole of the output of the switching power supply, and the negative pole of the touch screen is connected with the negative pole of the output of the switching power supply.
Furthermore, the temperature and pressure detection circuit comprises a thermal resistor PT, a pressure sensor P, a transmitter and a sampling module, the model of sampling module is EM AE04, the three-terminal of thermal resistance PT connects respectively at the three-terminal of changer received signal, the positive pole and the switching power supply output positive pole of changer and the L + pin of sampling module are connected, the L + pin of sampling module is connected with 2L port and the switching power supply output positive pole of main control chip, the M pin and the AIWO-pin of sampling module all are connected with switching power supply output negative pole, the negative pole and the AIWO + pin of changer are connected, pressure sensor P's first pin and the anodal of touch-sensitive screen are connected, pressure sensor P's second pin and the AIWI + pin of sampling module are connected, pressure sensor P's third pin and the negative pole of touch-sensitive screen and the AIWI-pin of sampling module are connected.
Further, the dry heating circuit comprises six dry heating pipes, a second direct current contactor and a third direct current contactor, the second direct current contactor comprises a coil KM21 and three groups of normally open contacts KM22, the third direct current contactor comprises a coil KM31 and three groups of normally open contacts KM32, one end of each group of normally open contacts KM22 is respectively connected with three phases of L1, L2 and L3 of a three-phase power supply, one end of each group of normally open contacts KM32 is respectively connected with three phases of L1, L2 and L3 of the three-phase power supply, the six dry heating pipes are divided into two groups by taking three phases as a group, one end of one group of dry heating pipes is respectively connected with the other ends of the three groups of normally open contacts KM22, the other ends of one group of dry heating pipes are connected together, one end of the other group of dry heating pipes is respectively connected with the other ends of the three groups of normally open, one end of the coil KM21 and one end of the coil KM31 are both connected with the negative electrode of the output of the switching power supply, the other end of the coil KM21 is connected with the Q0.5 port of the main control chip, and the other end of the coil KM31 is connected with the Q0.6 port of the main control chip.
Further, the heat dissipation circuit comprises a fan M1, a fan M2, a second intermediate relay and a third intermediate relay, the second intermediate relay comprises a coil KA21 and two groups of normally open contacts KA22, the third intermediate relay comprises a coil KA31 and two groups of normally open contacts KA32, one ends of the two groups of normally open contacts KA22 are respectively connected with L, N of the motor M1, and the other ends of the two groups of normally open contacts KA22 are respectively connected with a zero line N and an L1 of a three-phase power supply; one ends of the two groups of normally open contacts KA32 are respectively connected with L, N of the motor M2, and the other ends of the two groups of normally open contacts KA32 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA21 and one end of the coil KA31 are both connected with the negative electrode of the output of the switching power supply, the other end of the coil KA21 is connected with the port Q0.0 of the main control chip, and the other end of the coil KA31 is connected with the port Q0.1 of the main control chip.
Further, the water level control circuit comprises an electromagnetic valve YV and a fourth intermediate relay, the fourth intermediate relay comprises a coil KA41 and two groups of normally open contacts KA42, the electromagnetic valve YV is connected between one ends of the two groups of normally open contacts KA42, and the other ends of the two groups of normally open contacts KA42 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA41 is connected with the negative electrode of the output of the switching power supply, and the other end of the coil KA41 is connected with the Q0.2 port of the main control chip.
Further, the input voltage of the switching power supply is 220VAC, and the output voltage of the switching power supply is 24 VDC.
Furthermore, the rated power of the dry type heating circuit is 3KW, and the rated power of the soaking heating circuit is 4.5 KW.
The utility model has the advantages that:
(1) the utility model discloses temperature and pressure detection circuit detects pressure and temperature, and main control chip evaporates the rice automatically according to the setting value of pressure and temperature, and the touch-sensitive screen shows data such as temperature pressure and sets for parameters such as temperature pressure time through the touch-sensitive screen, and maneuverability is strong, simultaneously water logging heating and dry-type heating two kinds of heating methods, and the heating circuit that soaks sets up two sets of heaters, and each other is reserve, duplicate protection, in case the heater damages, the function is comparatively abundant;
(2) by setting switch S1 and a first intermediate relay. When rice needs to be steamed, the switch S1 is pressed, the coil of the first intermediate relay is electrified, the normally open contact KA12 connected with the circuit where the switch power supply is located is closed, the circuit is connected, and the control process is simple and convenient;
(3) the water level is detected by arranging the high water level electrode and the low water level electrode, the electromagnetic valve YV is controlled to lose power when the water level is high, water inflow is stopped, the electromagnetic valve YV is controlled to be electrified when the water level is low, water inflow is started, dry burning is prevented, the water level is prevented from being too high, and automatic control of the water level is realized;
(4) the method comprises the following steps that a touch screen is arranged, the touch screen can display equipment state information and can set parameters such as temperature, pressure and time, a main control chip receives the parameters and automatically controls rice steaming according to the parameters;
(5) the dry heating circuit is provided with two groups of dry heaters which work simultaneously, on one hand, the rice steaming process can be accelerated by working simultaneously, on the other hand, when one group of dry heaters are damaged, the other group of dry heaters work normally, and the phenomenon that the whole equipment stops working due to the damage of the heaters is avoided;
(6) through setting up heat dissipation circuit, prevent that equipment during operation shell temperature is too high, guarantee equipment safety avoids the potential safety hazard.
Drawings
Fig. 1 is a block diagram of a PLC control system of a full-automatic steam box disclosed in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a PLC control system of a full-automatic steam box disclosed in an embodiment of the present invention;
fig. 3 is a partial view of a circuit schematic diagram of a PLC control system of a fully automatic steam box according to an embodiment of the present invention;
fig. 4 is another partial view of the circuit schematic diagram of the PLC control system of the fully automatic steam box disclosed in the embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the PLC control system of a full-automatic steam box includes a temperature and pressure detection circuit 1, a main control chip 2, a touch screen 3, a switching power supply 4, a dry heating circuit 5, a soaking heating circuit 6, a heat dissipation circuit 7 and a water level control circuit 8, wherein the main control chip 2 is respectively connected to the temperature and pressure detection circuit 1, the switching power supply 4, the touch screen 3, the dry heating circuit 5, the soaking heating circuit 6, the heat dissipation circuit 7 and the water level control circuit 8. The input voltage of the switching power supply 4 is 220VAC, and the output voltage of the switching power supply 4 is 24 VDC. The rated power of the dry heating circuit 5 is 3KW, and the rated power of the soaking heating circuit 6 is 4.5 KW.
As shown in fig. 2 to 4, the soaking heating circuit 6 includes a first dc contactor and six soaking heating pipes 601, the first dc contactor includes a coil KM11 and three sets of normally open contacts KM12, one end of the coil KM11 is connected to the output negative pole of the switching power supply 4, the other end of the coil KM11 is connected to the Q0.3 port of the main control chip 2, the main control chip 2 is connected to the output positive pole of the switching power supply 4, one end of the three sets of normally open contacts KM12 is respectively connected to the three phases of L1, L2 and L3 of the three-phase power supply, the six soaking heating pipes 601 form two sets with three as one set, one end of each set of soaking heating pipes 601 is respectively connected to the other ends of the three sets of normally open contacts, and the other ends of each set of soaking heating pipes 601 are.
The steamer control circuit still includes switch S1, circuit breaker QF and first auxiliary relay, first auxiliary relay includes coil KA11 and two sets of normally open contact KA12, four normally open contacts of circuit breaker QF are connected with three phase current L1, L2, L3 and zero line N respectively, the one end of switch S1 is connected with three phase current 'S zero line N, the other end of switch S1 is connected with three phase current' S L1 through coil KA11, the one end of two sets of normally open contact KA12 is connected with three phase current 'S zero line N and L1 respectively, the other end of two sets of normally open contact KA12 is connected with switching power supply 4' S input.
The steam box control circuit further comprises a high water level electrode 9, a low water level electrode 10 and a temperature control switch S2, the type of the main control chip 2 is CPU ST20, an I0.2 port of the main control chip 2 is connected with the high water level electrode 9, an I0.0 port of the main control chip 2 is connected with the low water level electrode 10, an I0.3 port of the main control chip 2 is connected with an L port of the main control chip 2 and an output anode of the switching power supply 4 through the temperature control switch S2, and an M port of the main control chip 2 is connected with an output cathode of the switching power supply 4 and an M1 port of the main control chip 2 respectively.
The model of the touch screen 3 is SMART 700IE V3, the positive pole of the touch screen 3 is connected with the output positive pole of the switching power supply 4, and the negative pole of the touch screen 3 is connected with the output negative pole of the switching power supply 4.
Temperature pressure detection circuitry 1 includes thermal resistance PT, pressure sensor P, changer 11 and sampling module 12, and thermal resistance PT's model is PT100, sampling module 12's model is EM AE04, thermal resistance PT's three-terminal connects respectively at changer 11 received signal's three-terminal, changer 11's positive pole and switching power supply 4 output positive pole and sampling module 12's L + pin are connected, sampling module 12's L + pin and main control chip 2's 2L port and switching power supply 4 output positive pole are connected, sampling module 12's M pin and AIWO-pin all are connected with switching power supply 4 output negative pole, changer 11's negative pole and sampling module 12's AIWO + pin are connected, pressure sensor P's first pin and touch-sensitive screen 3's positive pole are connected, pressure sensor P's second pin and sampling module 12's AIWI + pin are connected, pressure sensor P's third pin and touch-sensitive screen 3's negative pole and sampling module 12's AIWI-pin of sampling module 12 are connected And (4) connecting.
The dry heating circuit 5 comprises six dry heating pipes 501, a second direct current contactor and a third direct current contactor, the second direct current contactor comprises a coil KM21 and three groups of normally open contacts KM22, the third direct current contactor comprises a coil KM31 and three groups of normally open contacts KM32, one end of each group of normally open contacts KM22 is respectively connected with three phases of L1, L2 and L3 of a three-phase power supply, one end of each group of normally open contacts KM32 is respectively connected with three phases of L1, L2 and L3 of the three-phase power supply, the six dry heating pipes 501 are divided into two groups by taking three as a group, one end of each group of dry heating pipes 501 is respectively connected with the other ends of the three groups of normally open contacts KM22, the other ends of each group of dry heating pipes 501 are connected together, one end of each group of dry heating pipes 501 is respectively connected with the other ends of the three groups of normally open contacts, one end of the coil KM21 and one end of the coil KM31 are both connected with the output negative electrode of the switching power supply 4, the other end of the coil KM21 is connected with the Q0.5 port of the main control chip 2, and the other end of the coil KM31 is connected with the Q0.6 port of the main control chip 2.
The heat dissipation circuit 7 comprises a fan M1, a fan M2, a second intermediate relay and a third intermediate relay, the second intermediate relay comprises a coil KA21 and two groups of normally open contacts KA22, the third intermediate relay comprises a coil KA31 and two groups of normally open contacts KA32, one ends of the two groups of normally open contacts KA22 are respectively connected with L, N of a motor M1, and the other ends of the two groups of normally open contacts KA22 are respectively connected with a zero line N and an L1 of a three-phase power supply; one ends of the two groups of normally open contacts KA32 are respectively connected with L, N of the motor M2, and the other ends of the two groups of normally open contacts KA32 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA21 and one end of the coil KA31 are both connected with the output cathode of the switching power supply 4, the other end of the coil KA21 is connected with the Q0.0 port of the main control chip 2, and the other end of the coil KA31 is connected with the Q0.1 port of the main control chip 2.
The water level control circuit 8 comprises an electromagnetic valve YV and a fourth intermediate relay, the fourth intermediate relay comprises a coil KA41 and two groups of normally open contacts KA42, the electromagnetic valve YV is connected between one ends of the two groups of normally open contacts KA42, and the other ends of the two groups of normally open contacts KA42 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA41 is connected with the output cathode of the switch power supply 4, and the other end of the coil KA41 is connected with the Q0.2 port of the main control chip 2.
The utility model discloses a working process does: the thermal resistor PT converts the temperature quantity into a resistance quantity by using the principle that the resistance changes along with the temperature, the transmitter 11 applies an excitation current to the thermal resistor PT to measure the voltage at two ends to obtain a current value, sends the current value to the sampling module 12, and converts the current value into a temperature value; the pressure sensor P deforms the inside of the sensor through external force to generate a pressure resistance effect, so that the change of impedance is converted into a process electric signal, the process electric signal is sent to the sampling module 12, and the process electric signal is converted into a pressure value; the main control chip 2 receives the temperature value fed back by the thermal resistor PT and the pressure value fed back by the pressure sensor P. The operation and stop of the dry heater and the water immersion heater on the equipment are controlled by setting parameters such as an upper temperature limit value, a lower temperature limit value, heating time, an upper pressure limit value and a lower pressure limit value through the touch screen 3. The specific working process is as follows:
when the switch S1 is pressed, the coil KA11 is electrified, the normally open contact KA12 is closed to electrify the control loop, relevant instruction parameters are set through the touch screen 3, the instruction parameters can be set according to a rice steaming menu or can be set by an operator, and the main control chip 2 starts to work according to the set instruction parameters. When the steam box starts to operate, the Q0.0 port of the main control chip 2, the Q0.1 port is closed to enable the coil KA21 coil KA31 to be electrified, the normally open contact KA22 and the normally open contact KA32 are closed, the fan M1 and the fan M2 work, the heat of the shell of the steam box is dissipated, the steam box stops working, the Q0.0 port of the main control chip 2, the Q0.1 port is powered off to enable the coil KA21 coil KA31 to be powered off, the normally open contact KA22 and the normally open contact KA32 are switched to be disconnected by closing, and the fan M1 and the fan M2 stop working.
High water level electrode 9 and low water level electrode 10 detect the water level in the steam ager, when the water level does not reach high water level, the I0.2 port of main control chip 2 has not received the water level signal, Q0.2 port closing coil KA41 gets electric while normally open contact KA42 is closed, solenoid valve YV work, begin to intake, when the water level reachs high water level, the I0.2 port of main control chip 2 receives the water level signal, Q0.2 port disconnection, coil KA41 loses electric while normally open contact KA42 is switched to the disconnection by the closure, solenoid valve YV disconnection, stop intaking.
According to the mode setting of the touch screen 3, when the dry heater does not work, the temperature of the steam box chamber reaches the set temperature and the time does not reach, the port Q0.3 of the main control chip 2 is disconnected, the coil KM11 loses power, the normally open contact KM12 is disconnected, six immersion heaters of the immersion heating circuit 6 stop working, when the temperature is reduced to the set temperature of-10 ℃, the port Q0.3 of the main control chip 2 is closed, the coil KM11 is powered on, the normally open contact KM12 is closed, the six immersion heaters of the immersion heating circuit 6 work, the operation is repeated until the operation time is reached, and the heat preservation state is entered. When the working mode is set to be the working mode of the dry heater through the touch screen 3, when the water level of the steam box reaches a high water level, the coil KM11 is electrified, the normally open contact KM12 is closed, six immersion heaters of the immersion heating circuit 6 work, the current pressure reaches a set value and the temperature does not reach the set temperature value, the six immersion heaters of the immersion heating circuit 6 are cut off at the same time, the coil KM21 and the coil KM31 are electrified, the normally open contact KM22 and the normally open contact KM32 are closed, the six dry heaters of the dry heating circuit 5 work, when the current pressure is reduced to 0, the coil KM21 and the coil KM31 are electrified, the normally open contact KM22 and the normally open contact KM32 are disconnected, the six dry heaters of the dry heating circuit 5 stop working, the operation of the immersion heating circuit 6 is recovered at the same time. And circulating the steps until the whole set operation is finished. After the working mode is finished, the mode automatically changes to a heat preservation mode: in this mode, the submerged heating circuit 6 cannot be operated all the time, and in a set time, when the current temperature reaches the lower limit of a set temperature value, the dry heating circuit 5 and the fan operate, and when the current temperature reaches the upper limit of the set temperature value, the dry heating circuit 5 and the fan stop, the upper temperature limit is 80 ℃, and the lower temperature limit is 0 ℃.
It should be noted that the utility model discloses only protect hardware architecture, the program control process and the parameter setting that relate do not all belong to the utility model discloses a protection range, program control and parameter setting can adopt prior art, for clearer understanding the utility model discloses a scheme just expandes the explanation with program control's process, and the program control process belongs to the selection as required of technical staff in the field, for example to the settlement of temperature upper limit lower limit, all belong to the selection according to actual need according to hardware circuit making to the settlement of pressure and the control to relay and direct current contactor after arriving the temperature and the pressure of settlement.
Through the technical scheme, the utility model discloses temperature and pressure detection circuit 1 detects pressure and temperature, and main control chip 2 evaporates the rice automatically according to the setting value of pressure and temperature, and touch-sensitive screen 3 shows data such as temperature and pressure and sets for temperature pressure time isoparametric through touch-sensitive screen 3, and maneuverability is strong, and two kinds of heating methods of water logging heating and dry-type heating simultaneously, and water logging heating circuit 6 sets up two sets of heaters, and each other is reserve, duplicate protection to prevent the heater damage, and the function is comparatively abundant.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The PLC control system of the full-automatic steam box is characterized by comprising a temperature and pressure detection circuit, a main control chip, a touch screen, a switch power supply, a dry type heating circuit, a soaking heating circuit, a heat dissipation circuit and a water level control circuit, wherein the main control chip is respectively connected with the temperature and pressure detection circuit, the switch power supply, the touch screen, the dry type heating circuit, the soaking heating circuit, the heat dissipation circuit and the water level control circuit, the soaking heating circuit comprises a first direct current contactor and six soaking heating pipes, the first direct current contactor comprises a coil KM11 and three groups of normally open contacts KM12, one end of the coil KM11 is connected with the output negative electrode of the switch power supply, the other end of the coil KM11 is connected with a Q0.3 port of a main control module, the main control module is connected with the output positive electrode of the switch power supply, and one ends of the three groups of normally open contacts KM12 are respectively connected, The three-phase connection of L3, six soaking heating pipe use three to form two sets ofly for a set of, and the one end of every group soaking heating pipe is equallyd divide and is connected with the other end of three group's normally open contacts respectively, and the other end parallel connection of every group soaking heating pipe is in the same place.
2. The PLC control system of a full-automatic steam box according to claim 1, further comprising a switch S1, a circuit breaking protector QF and a first intermediate relay, wherein the first intermediate relay comprises a coil KA11 and two sets of normally open contacts KA12, four normally open contacts of the protector QF are respectively connected with a three-phase power supply L1, L2, L3 and a zero line N, one end of a switch S1 is connected with the zero line N of the three-phase power supply, the other end of the switch S1 is connected with the L1 of the three-phase power supply through the coil KA11, one ends of the two sets of normally open contacts KA12 are respectively connected with the zero line N and the L1 of the three-phase power supply, and the other ends of the two sets of normally open contacts KA12 are connected with an input end of the switch power supply.
3. The PLC control system of claim 2, further comprising a high water level electrode, a low water level electrode and a temperature controlled switch, wherein the main control chip is of a type CPU ST20, an I0.2 port of the main control chip is connected to the high water level electrode, an I0.0 port of the main control chip is connected to the low water level electrode, an I0.3 port of the main control chip is connected to an L port of the main control chip and an anode of the switching power supply output through the temperature controlled switch, and an M port of the main control chip is connected to a cathode of the switching power supply output and an M1 port of the main control chip respectively.
4. The PLC control system of the full-automatic steam box according to claim 1, wherein the touch screen is SMART 700IE V3, the positive electrode of the touch screen is connected with the positive electrode of the output of the switching power supply, and the negative electrode of the touch screen is connected with the negative electrode of the output of the switching power supply.
5. The PLC control system of claim 4, wherein the temperature and pressure detection circuit comprises a thermal resistor PT, a pressure sensor P, a transmitter and a sampling module, the model of the sampling module is EM AE04, three ends of the thermal resistor PT are respectively connected with three ends of the transmitter for receiving signals, the positive electrode of the transmitter is connected with the positive electrode of the switching power supply output and the L + pin of the sampling module, the L + pin of the sampling module is connected with the 2L port of the main control chip and the positive electrode of the switching power supply output, the M pin and the AIWO-pin of the sampling module are both connected with the negative electrode of the switching power supply output, the negative electrode of the transmitter is connected with the AIWO + pin of the sampling module, the first pin of the pressure sensor P is connected with the positive electrode of the touch screen, the second pin of the pressure sensor P is connected with the AIWI + pin of the sampling module, and a third pin of the pressure sensor P is connected with the negative electrode of the touch screen and the AIWI-pin of the sampling module.
6. The PLC control system of a full-automatic steam box according to claim 1, wherein the dry heating circuit comprises six dry heating pipes, a second direct current contactor and a third direct current contactor, the second direct current contactor comprises a coil KM21 and three groups of normally open contacts KM22, the third direct current contactor comprises a coil KM31 and three groups of normally open contacts KM32, one end of each group of normally open contacts KM22 is respectively connected with three phases of L1, L2 and L3 of a three-phase power supply, one end of each group of normally open contacts KM32 is respectively connected with three phases of L1, L2 and L6857 of the three-phase power supply, the six dry heating pipes are divided into two groups of three, one end of each group of dry heating pipes is respectively connected with the other ends of the three groups of normally open contacts KM22, the other ends of each group of dry heating pipes are connected together, one end of each group of dry heating pipes is respectively connected with the other ends of the three groups of, the other ends of the other group of dry heating pipes are connected together, one end of the coil KM21 and one end of the coil KM31 are both connected with the negative electrode of the output of the switching power supply, the other end of the coil KM21 is connected with the Q0.5 port of the main control chip, and the other end of the coil KM31 is connected with the Q0.6 port of the main control chip.
7. The PLC control system of the full-automatic steam box according to claim 1, wherein the heat dissipation circuit comprises a fan M1, a fan M2, a second intermediate relay and a third intermediate relay, the second intermediate relay comprises a coil KA21 and two sets of normally open contacts KA22, the third intermediate relay comprises a coil KA31 and two sets of normally open contacts KA32, one end of each of the two sets of normally open contacts KA22 is connected with a L, N of a motor M1, and the other end of each of the two sets of normally open contacts KA22 is connected with a neutral line N and an L1 of a three-phase power supply; one ends of the two groups of normally open contacts KA32 are respectively connected with L, N of the motor M2, and the other ends of the two groups of normally open contacts KA32 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA21 and one end of the coil KA31 are both connected with the negative electrode of the output of the switching power supply, the other end of the coil KA21 is connected with the port Q0.0 of the main control chip, and the other end of the coil KA31 is connected with the port Q0.1 of the main control chip.
8. The PLC control system of the full-automatic steam box according to claim 1, wherein the water level control circuit comprises a solenoid valve YV and a fourth intermediate relay, the fourth intermediate relay comprises a coil KA41 and two groups of normally open contacts KA42, the solenoid valve YV is connected between one ends of the two groups of normally open contacts KA42, and the other ends of the two groups of normally open contacts KA42 are respectively connected with a zero line N and L1 of a three-phase power supply; one end of the coil KA41 is connected with the negative electrode of the output of the switching power supply, and the other end of the coil KA41 is connected with the Q0.2 port of the main control chip.
9. The PLC control system of a full automatic steam box according to claim 1, wherein the input voltage of the switching power supply is 220VAC, and the output voltage of the switching power supply is 24 VDC.
10. The PLC control system of a fully automatic steam box according to claim 1, wherein the rated power of the dry heating circuit is 3KW, and the rated power of the soaking heating circuit is 4.5 KW.
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| CN117648009A (en) * | 2024-01-29 | 2024-03-05 | 杭州海创自动化有限公司 | Ship video display system |
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