CN211626793U - Open pot pressure difference detection system - Google Patents
Open pot pressure difference detection system Download PDFInfo
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- CN211626793U CN211626793U CN201922481786.4U CN201922481786U CN211626793U CN 211626793 U CN211626793 U CN 211626793U CN 201922481786 U CN201922481786 U CN 201922481786U CN 211626793 U CN211626793 U CN 211626793U
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Abstract
The utility model relates to a pressure differential detection technical field discloses an opening pot pressure differential detection system, including PLC control assembly, PLC control assembly includes central control unit, analog input unit, digital input unit and electrical unit, digital input unit with central control unit electricity signal connection gives central control unit with digital input unit received signal transmission, analog input unit with central control unit electricity signal connection, analog input unit converts received analog signal to digital signal and transmits for central control unit, analog input unit, digital input unit all are connected with electrical unit. The utility model discloses well central control unit carries out logic processing according to the signal of difference to corresponding action is made to open pot, solenoid valve according to the program command, thereby realizes differential pressure monitoring.
Description
Technical Field
The utility model relates to a pressure differential detection technical field, concretely relates to opening pot pressure differential detection system.
Background
The pressure detection and protection system of the boiler is a necessary measure for ensuring the safe operation of the boiler. The existing open pot adopts an air duct type ventilation and dust removal mode to discharge the medicinal powder, so that when a fan fails or other system fails, the product defect caused by unsmooth dust removal is easily caused, quality accidents are caused, unstable factors are more, and the protective measures are insufficient.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide an open pot pressure difference detection system, which comprises a PLC control component, the PLC control component comprises a central control unit, an analog input unit, a digital input unit and a power supply unit, the digital quantity input unit is in electric signal connection with the central control unit and transmits the signal received by the digital quantity input unit to the central control unit, the analog quantity input unit is in electric signal connection with the central control unit, converts the received analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the central control unit, the central control unit, the analog input unit and the digital input unit are all connected with the power supply unit, the power supply unit can provide 24V power to charge the central control unit, the analog quantity input unit and the digital quantity input unit.
The utility model provides an opening pot pressure differential detection system still includes equipment room and opening pot management office, be equipped with the opening pot in the equipment room, the opening pot is connected with the fan, the fan is connected with the dust removal tuber pipe, the middle section of dust removal tuber pipe is equipped with differential pressure transmitter, differential pressure transmitter with analog input unit electric signal connection, the fan with central control unit electric signal connection, opening pot management office is including showing the box, be equipped with the HMI touch-sensitive screen on showing the box, the HMI touch-sensitive screen with central control unit telecommunication signal connects, the HMI touch-sensitive screen is used for the differential pressure data in display device room.
The input end of the central control unit is connected with a digital quantity input module, and the digital quantity input module comprises a first digital quantity input module, a second digital quantity input module, a third digital quantity input module, a fourth digital quantity input module and a fifth digital quantity input module; the first digital quantity input module is connected with ports I2.0 to I2.7 of the central control unit, the second digital quantity input module is connected with ports I0.0 to I0.7 of the central control unit, and the third digital quantity input module is connected with ports I1.0 to I1.7 of the central control unit.
Furthermore, the model of the digital input unit is 6ES7321-1BH02-0AA0, the fourth digital input module is connected with ports I3.0 to I3.7 of the digital input unit, and the fifth digital input module is connected with ports I4.0 to I4.7 of the digital input unit.
Furthermore, the output end of the central control unit is connected with an output module, and the digital output module comprises a first digital output module, a second digital output module and a third digital output module; the first digital output module is electrically connected with an electromagnetic valve, the first digital output module is connected with ports Q0.0 to Q0.7 of the central control unit, and the central control unit realizes the control of the electromagnetic valve through the signal transmission of the first digital output module; the second digital quantity output module is in electric signal connection with the open pot, the second digital quantity output module is connected with ports Q1.0 to Q1.7 of the central control unit, and the central control unit is used for controlling the open pot through signal transmission of the second digital quantity output module; the third digital output module is electrically connected with an alarm lamp and standby equipment, and is connected with ports Q2.0 to Q2.7 of the central control unit.
Furthermore, the analog input unit is of a model number of 6ES7331-7KF02-OABO, and is connected with an analog input module, and the analog input module comprises a first analog input module, a second analog input module and a third analog input module;
further, the first analog input module is connected with ports CH0 to CH3 of a central control unit, the second analog input module is connected with a group of ports CH0 to CH8 of the analog input unit, and the third analog input module is connected with a group of ports CH0 to CH8 of the analog input control unit.
Preferably, the intelligent control system further comprises a solenoid valve control circuit, wherein the solenoid valve control circuit comprises solenoid valve branches and alarm branches, each solenoid valve branch is provided with a solenoid valve, each alarm branch comprises an LED alarm lamp, and the LED alarm lamps are usually turned on when the circuit roadblock exists.
Preferably, the electromagnetic valve is an explosion-proof safety gas circuit electromagnetic valve, and the electromagnetic valve is used for switching on a gas circuit when the system operates normally and switching off the gas circuit when the system operates abnormally.
Preferably, the central control unit is 6ES7214-6CG 03-OAOB.
Compared with the prior art, the beneficial effects of the utility model are that:
1. and a set of electronic differential pressure transmitter is added, an analog input module is used for accessing a differential pressure signal value transmitted by the electronic differential pressure transmitter and transmitting the differential pressure signal value to an analog input unit, the analog input unit processes the analog signal and converts the analog signal into a corresponding digital signal to transmit the digital signal to a central control unit, the central control unit performs display and logic processing, and the differential pressure value transmitted by the differential pressure transmitter is used for judging the air volume and the air pressure in the air pipe, so that the current air volume is continuously monitored, a 4-20 mA test value is output, and an actual measurement parameter reference value is provided for subsequent program logic judgment.
2. And the newly-added explosion-proof normally-closed safety type air path electromagnetic valve is used for opening or cutting off the air path according to the control signal.
3. The HMI touch screen is in telecommunication signal connection with the central control unit, and the HMI touch screen can receive and display differential pressure data of the central control unit through data communication, so that managers of an open pot management office can know the conditions of equipment rooms in time.
4. The system has clear process control logic, can simultaneously control a plurality of open pots to work, detects the pressure difference of different open pots, and has high stability.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic diagram of a power supply unit;
FIG. 3 is an electrical schematic diagram of a first digital input module;
FIG. 4 is an electrical schematic diagram of a second digital quantity input module;
FIG. 5 is an electrical schematic diagram of a third digital input module;
FIG. 6 is an electrical schematic diagram of a first digital output module;
fig. 7 is an electrical schematic diagram of a second digital quantity output module;
FIG. 8 is an electrical schematic diagram of a fourth digital input module;
FIG. 9 is an electrical schematic diagram of a fifth digital input module;
FIG. 10 is an electrical schematic diagram of a third digital output module;
FIG. 11 is an electrical schematic diagram of a first analog input module;
FIG. 12 is an electrical schematic of a second analog input module;
FIG. 13 is an electrical schematic of a third analog input module;
fig. 14 is a circuit diagram of a solenoid valve control circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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 work belong to the protection scope of the present invention.
As shown in figure 1, the open pot pressure difference detection system comprises a PLC control assembly, wherein the PLC control assembly comprises a central control unit, an analog input unit, a digital input unit and a power supply unit, the digital quantity input unit is in electric signal connection with the central control unit and transmits the signal received by the digital quantity input unit to the central control unit, the analog quantity input unit is in electric signal connection with the central control unit, converts the received analog quantity signal into a digital quantity signal and transmits the digital quantity signal to the central control unit, the central control unit is used for controlling the running state of the equipment, the central control unit, the analog input unit and the digital input unit are all connected with the power supply unit, the power supply unit can provide 24V power to supply power for the central control unit, the analog quantity input unit and the digital quantity input unit.
The utility model provides an in the embodiment, the on-the-spot equipment room and opening pot management office that is equipped with, the equipment room is equipped with between 8, all is equipped with the opening pot in every equipment room, the opening pot is connected with the fan, the fan is connected with the dust removal tuber pipe, and the dust attracts to arrange the assigned position through the dust removal tuber pipe through the fan. The middle section of the dedusting air pipe is provided with a differential pressure transmitter, the differential pressure transmitter is in electrical signal connection with the analog input unit, the differential pressure transmitter detects a differential pressure value between the inside of the monitoring pipe and the atmosphere of a room and transmits data to the analog input unit. The fan with central control unit electricity signal connection, the opening pot management office is including showing the box, be equipped with the HMI touch-sensitive screen on showing the box, the HMI touch-sensitive screen with central control unit telecommunication signal connection, the HMI touch-sensitive screen is used for the differential pressure data in display equipment room.
As shown in fig. 2, the power supply unit includes a PLC-TC module and a TC module, a port 1 of the PLC-TC module and a port L1 of the TC module are both connected to an external L1 line, a port 2 of the PLC-TC module and a port N of the TC module are both connected to an external N line, and the PLC-TC module and the TC module are configured to output a 24V dc power supply.
As shown in fig. 3 to 5, the central control unit is of a type 6ES7214-6CG03-OAOB, and an input end of the central control unit is connected with a digital quantity input module, where the digital quantity input module includes a first digital quantity input module, a second digital quantity input module, a third digital quantity input module, a fourth digital quantity input module, and a fifth digital quantity input module; the first digital quantity input module comprises eight branch circuits and a grounding branch circuit, the eight branch circuits are respectively connected with I2.0-I2.7 ports of the central control unit, the eight branch circuits are relatively provided with normally open contacts K8-K15, the first branch circuit and the second branch circuit are used for transmitting running state signals of No. 7 and No. 8 fans to the central control unit, and the third branch circuit and the sixth branch circuit are used for transmitting fault state signals of No. 1 to No. 6 fans to the central control unit.
Further, the second digital quantity input module includes eight tributaries and a power branch, the power branch links to each other with electrical unit for charge for central control unit, eight tributaries respectively with central control unit' S I0.0 to I0.7 number port is connected, is equipped with normally open contact K0, K1 on first tributary, the second road respectively, and the third is equipped with manual valve respectively for S1 ~ S6 to eight tributaries relatively, and first, two tributaries are used for transmitting the wind pressure state signal to central control unit, and the third is used for the emergency stop state of manual control 1 to 6 numbers fan and transmits central control unit to eight tributaries.
Furthermore, the third digital quantity input module comprises eight branches and a grounding branch, the eight branches are respectively connected with ports I1.0 to I1.7 of the central control unit, the first branch and the second branch are respectively provided with manual valves S7 and S8, the third branch to the eighth branch are relatively provided with normally open contacts K2 to K7, the first branch and the second branch are used for manually controlling the emergency stop state of the 7 or 8 engine and transmitting signals to the central control unit, and the third branch to the sixth branch are used for transmitting operating state signals of the 1 to 6 fans to the central control unit.
As shown in fig. 8 and 9, the model of the digital input unit is 6ES7321-1BH02-0AA0, the fourth digital input module includes eight branches and a ground branch, the eight branches are connected to ports I3.0 to I3.7 of the digital input unit, the eight branches are relatively provided with normally open contacts K16 to K23, the first branch and the second branch are used for transmitting fault state signals of fans nos. 7 and 8 to the digital input unit, and the third branch and the sixth branch are used for transmitting overheat display signals of fans nos. 1 to 6 to the digital input unit.
Furthermore, the fifth digital input module comprises eight branches and a power branch, the power branch is connected with the power module, the power branch is used for supplying power to the digital input unit, the eight branches are respectively connected with ports I4.0 to I4.7 of the digital input unit, the first branch and the second branch are respectively provided with normally open contacts K24 and K25, the first branch and the second branch are used for transmitting signals indicating overheating of the 7 # and 8 # fans to the digital input unit, and the third branch to the eighth branch are signal transmission standby branches.
As shown in fig. 6, 7 and 10, the output end of the central control unit is connected with an output module, the output module includes a first digital output module, a second digital output module and a third digital output module, the first digital output module includes eight branches, the eight branches are respectively connected with the ports Q0.0 to Q0.7 of the central control unit, each branch is relatively provided with relays KA0 to KA7, the relays KA0 to KA7 are respectively used for driving solenoid valves 1 to 8, and the central control unit is used for controlling the solenoid valves 1 to 8.
Further, the second digital quantity output module includes eight branches, eight branches respectively with central control unit's Q1.0 is connected to Q1.7 port, all be equipped with the relay relatively on every branch road and be KA8 to KA15 respectively, relay KA8 is used for driving No. 1 to No. 8 opening pots respectively to KA15, and central control unit is used for 1 to No. 8 opening pot control.
Furthermore, the third digital output module comprises eight branches which are respectively connected with ports of the central control unit Q2.0 to Q2.7, a relay K19 is arranged on the fourth branch for driving an alarm lamp, and other branches are standby.
As shown in fig. 11 to 13, the analog input unit is of a model number 6ES7331-7KF02-OABO, and is connected with an analog input module, which includes a first analog input module, a second analog input module, and a third analog input module.
Further, the first analog quantity input module is connected with CH0 to CH3 ports of the central control unit for standby; the second analog quantity input module comprises eight groups of branches, each group of branches comprises a pressure difference transmitter with the model number of 7MF4433, the pressure difference transmitter is used for detecting the pressure difference of the open-ended boiler air pipe, and the eight groups of branches are connected with one group of ports from CH0 to CH8 of the analog quantity input unit through the pressure difference transmitter and are used for transmitting pressure difference signals in No. 1 to No. 8 air pipes to the analog quantity input unit; and the third analog quantity input module is connected with a group of ports from CH0 to CH8 of the analog quantity input control unit and is used for transmitting No. 1 to No. 8 fan current signals to the analog quantity input unit.
Preferably, the utility model provides an in the embodiment, still include solenoid valve control circuit, solenoid valve control circuit includes eight solenoid valve branches and an warning branch road, and every solenoid valve branch road all is equipped with a solenoid valve and the normally open switch who establishes ties with it, the solenoid valve adopts explosion-proof safe type gas circuit solenoid valve for switch-on gas circuit when the system normal operating, cut off the gas circuit when unusual. The warning branch road includes a normally open switch KA19 and LED alarm lamp, and when the circuit broke down, central control unit control KA19 was closed, and the alarm lamp is often bright.
The utility model provides an in the embodiment, the pressure differential detection system of eight opening pots that provides, the middle section of opening pot dust removal tuber pipe is equipped with pressure differential transmitter, analog input unit can receive the differential pressure signal of interior tuber pipe of pot and the current signal of fan and give central control unit with signal transmission, digital input unit is used for receiving the signal of fan overheat display and gives central control unit, central control unit is used for receiving fan fault status signal, fan scram status signal and fan running state's signal, central control unit carries out logic processing according to the signal of difference, and to the opening pot according to program command, corresponding action is made to the solenoid valve. The central control unit judges the air volume and the air pressure in the air pipe according to the differential pressure value, so that the current air volume is continuously monitored, a 4-20 mA test value is output, an actual measurement parameter reference value is provided for logic judgment of a subsequent program, and the stability of the system is higher. Meanwhile, the central control unit transmits the differential pressure signal to the HMI touch screen, the HMI touch screen displays the differential pressure signal, so that office detection personnel can detect the state of the equipment room in real time, and once a fault occurs, the fault can be processed in time. The utility model discloses an among the detecting system, still be equipped with safe explosion-proof solenoid valve, but automatic cutout ventilation circuit when the system is unusual.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.
Claims (9)
1. The utility model provides an opening pot pressure differential detecting system, its characterized in that includes PLC control assembly, PLC control assembly includes central control unit, analog quantity input unit, digital quantity input unit and electrical unit, digital quantity input unit with central control unit signal connection, digital quantity input unit transmits received signal for central control unit, analog quantity input unit with central control unit signal connection, analog quantity input unit converts received analog quantity signal into digital quantity signal and transmits for central control unit, analog quantity input unit, digital quantity input unit all are connected with electrical unit, electrical unit can provide the power supply of 24V power for central control unit, analog quantity input unit, digital quantity input unit.
2. The open pot pressure difference detection system according to claim 1, further comprising an equipment room and an open pot management office, wherein an open pot is arranged in the equipment room, the open pot is connected with a fan, the fan is connected with a dedusting air pipe, a differential pressure transmitter is arranged in the middle section of the dedusting air pipe, the differential pressure transmitter is in electrical signal connection with the analog input unit, the fan is in electrical signal connection with the central control unit, the open pot management office comprises a display box body, an HMI touch screen is arranged on the display box body, the HMI touch screen is in electrical signal connection with the central control unit, and the HMI touch screen is used for displaying differential pressure data of the equipment room.
3. The open pot pressure difference detection system of claim 1, wherein the input end of the central control unit is connected with a digital input module, and the digital input module comprises a first digital input module, a second digital input module, a third digital input module, a fourth digital input module and a fifth digital input module;
the first digital quantity input module is connected with ports I2.0 to I2.7 of the central control unit, the second digital quantity input module is connected with ports I0.0 to I0.7 of the central control unit, and the third digital quantity input module is connected with ports I1.0 to I1.7 of the central control unit.
4. The open pot pressure difference detection system of claim 3, wherein the digital input unit is selected from the model number 6ES7321-1BH02-0AA0, the fourth digital input module is connected with the I3.0 to I3.7 ports of the digital input unit, and the fifth digital input module is connected with the I4.0 to I4.7 ports of the digital input unit.
5. The open pot pressure difference detection system of claim 2, wherein the output end of the central control unit is connected with a digital output module, the digital output module comprises a first digital output module, a second digital output module and a third digital output module, the first digital output module is electrically connected with a solenoid valve, the first digital output module is connected with the ports Q0.0 to Q0.7 of the central control unit, and the central control unit realizes the control of the solenoid valve through the signal transmission of the first digital output module; the second digital quantity output module is in electric signal connection with the open pot, the second digital quantity output module is connected with ports Q1.0 to Q1.7 of the central control unit, and the central control unit is used for controlling the open pot through signal transmission of the second digital quantity output module; the third digital output module is electrically connected with an alarm lamp and standby equipment, and is connected with ports Q2.0 to Q2.7 of the central control unit.
6. The open pot pressure difference detection system of claim 1, wherein the analog input unit is of a type 6ES7331-7KF02-OABO, and is connected with an analog input module, and the analog input module comprises a first analog input module, a second analog input module and a third analog input module;
the first analog quantity input module is connected with CH 0-CH 3 ports of the central control unit for standby; the second analog input module is connected with a group of ports from CH0 to CH8 of the analog input unit, and the third analog input module is connected with a group of ports from CH0 to CH8 of the analog input control unit.
7. The open pot pressure difference detection system according to claim 5, further comprising a solenoid valve control circuit, wherein the solenoid valve control circuit comprises a solenoid valve branch and an alarm branch, the solenoid valve branch is provided with the solenoid valve, the alarm branch comprises an LED alarm lamp, and the LED alarm lamp gives an alarm when a circuit fails.
8. The open pot pressure difference detection system of claim 7, wherein the solenoid valve is an explosion-proof safety gas circuit solenoid valve, and the solenoid valve is used for switching on a gas circuit when the system is in normal operation and switching off the gas circuit when the system is abnormal.
9. The open-pot differential pressure detection system of claim 1, wherein the central control unit is of type 6ES7214-6CG 03-OAOB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922481786.4U CN211626793U (en) | 2019-12-31 | 2019-12-31 | Open pot pressure difference detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922481786.4U CN211626793U (en) | 2019-12-31 | 2019-12-31 | Open pot pressure difference detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211626793U true CN211626793U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922481786.4U Expired - Fee Related CN211626793U (en) | 2019-12-31 | 2019-12-31 | Open pot pressure difference detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211626793U (en) |
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2019
- 2019-12-31 CN CN201922481786.4U patent/CN211626793U/en not_active Expired - Fee Related
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