CN216160089U - Granary gas tightness detects control system - Google Patents
Granary gas tightness detects control system Download PDFInfo
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- CN216160089U CN216160089U CN202122223392.6U CN202122223392U CN216160089U CN 216160089 U CN216160089 U CN 216160089U CN 202122223392 U CN202122223392 U CN 202122223392U CN 216160089 U CN216160089 U CN 216160089U
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- butterfly valve
- electric butterfly
- granary
- control system
- programmable logic
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Abstract
The utility model belongs to the field of automatic control controlled by a PLC (programmable logic controller), and particularly relates to a granary air tightness detection control system suitable for a granary. The system carries out logic control on the variable frequency fan and the electric butterfly valve through the programmable logic controller, and realizes positive pressure detection and negative pressure detection of the air tightness of the granary according to the feedback value of the pressure sensor; and analyzing and comparing the detection result, and displaying the air tightness grade and the pressure half-life time of the granary on the touch screen.
Description
Technical Field
The utility model belongs to the field of automatic control controlled by a PLC (programmable logic controller), and particularly relates to an air tightness detection control system suitable for grain depots.
Background
With the development and progress of society, in order to ensure that the stored grains have good quality, freshness, environmental protection and no pollution and reduce the loss of the grains in the storage process to the maximum extent, the grain storage technology gradually develops towards the green ecological grain storage directions of air conditioning, low temperature and the like. Before the grain is stored in the air-conditioned mode, the air tightness of the granary needs to be detected, the air tightness of the granary is detected by a pressure attenuation method generally, the traditional operation method is that a pressurizing fan is connected with the granary, a differential pressure gauge is connected with a warehouse through a latex tube, an operator controls the starting and stopping of the pressurizing fan by observing data of the differential pressure gauge, and a stopwatch is used for timing; the method has the defects of complex operation, inaccurate timing and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provides a granary air tightness detection control system.
The granary air tightness detection control system comprises a programmable logic controller, a touch screen, a first electric butterfly valve, a second electric butterfly valve, a third electric butterfly valve, a fourth electric butterfly valve, a variable frequency fan, a frequency converter, a pressure sensor and an air pipe.
The inlet of the first electric butterfly valve is connected with the outlet of the granary through a pipeline, the inlet of the second electric butterfly valve is communicated with air, the outlet of the first electric butterfly valve and the outlet of the second electric butterfly valve are connected with the inlet of the variable frequency fan through pipelines, the outlet of the variable frequency fan is connected with the inlet of the third electric butterfly valve and the inlet of the fourth electric butterfly valve through pipelines, the outlet of the fourth electric butterfly valve is connected with the inlet of the granary through a pipeline, and the outlet of the third electric butterfly valve is communicated with air. The pressure sensor is connected with the warehouse through an air pipe. The touch screen is connected with the programmable logic controller in an Ethernet communication mode.
The granary air tightness detection control system is characterized in that positive air tightness detection and negative air tightness detection can be performed on a granary.
The granary air tightness detection control system is characterized in that after logical operation of a programmable logic controller, function switching of positive pressure detection and negative pressure detection can be achieved without changing an external connecting pipeline.
The granary air tightness detection control system is characterized in that granary air tightness detection can be performed through one key on a touch screen, and granary air tightness grade and pressure half-life time can be displayed on the touch screen.
The granary airtightness detection control system is characterized in that granary airtightness detection historical records can be inquired through a touch screen.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic diagram of the positive pressure test operation of the present invention.
Fig. 3 is a schematic view of the negative pressure detection of the present invention.
In the figure: 1. a programmable logic controller; 2. a touch screen; 3. a frequency converter; 4. a variable frequency fan; 5. a pressure sensor; 6. an air tube; 7. a first electric butterfly valve; 8. a second electric butterfly valve; 9. a third electric butterfly valve; 10. a fourth electric butterfly valve; 11. and (4) a granary.
Detailed Description
The technical scheme of the utility model is as follows: an inlet of the first electric butterfly valve (7) is connected with an outlet of the granary (11) through a pipeline, an inlet of the second electric butterfly valve (8) is communicated with air, an outlet of the first electric butterfly valve (7) and an outlet of the second electric butterfly valve (8) are connected with an inlet of the variable frequency fan (4) through a pipeline, an outlet of the variable frequency fan (4) is connected with an inlet of the third electric butterfly valve (9) and an inlet of the fourth electric butterfly valve (10) through a pipeline, an outlet of the fourth electric butterfly valve (10) is connected with an inlet of the granary (11) through a pipeline, and an outlet of the third electric butterfly valve (9) is communicated with air. The pressure sensor (5) is connected with the warehouse (11) through an air pipe (6). The frequency conversion fan (4) is connected with the frequency converter (3) through a cable, and the frequency converter (3) is connected with the programmable logic controller (1) through an RS485 communication mode. The touch screen (2) is connected with the programmable logic controller (1) in an Ethernet communication mode.
The specific control of the utility model is as follows: the programmable logic controller (1) controls the second electric butterfly valve (8) and the fourth electric butterfly valve to be opened (10), the first electric butterfly valve (7) and the third electric butterfly valve to be closed (9), and the variable frequency fan (4) is started to realize the air tightness positive pressure detection of the granary; the programmable logic controller (1) controls the first electric butterfly valve (7) and the third electric butterfly valve (9) to be opened, the second electric butterfly valve (8) and the fourth electric butterfly valve (10) to be closed, and the variable frequency fan (4) is started to realize the air tightness negative pressure detection of the granary.
The touch screen (2) is connected with the programmable logic controller (1) in an Ethernet communication mode and can control the starting and stopping of the air tightness detection. According to the air tightness grading rule in the national standard GB/T25229-2010, the programmable logic controller compares the grain bin pressure half-life time to realize air tightness grading of the grain bin, and displays the air tightness detection grade and the pressure half-life time of the grain bin through the touch screen.
After the air tightness detection of the granary is completed, the programmable logic controller records data, and historical data of the air tightness detection of the granary, including detection date, the air tightness grade of the granary and pressure half-life time, can be inquired through the touch screen.
Claims (4)
1. A granary air tightness detection control system comprises a programmable logic controller (1), a touch screen (2), a frequency converter (3), a variable frequency fan (4), a pressure sensor (5), an air pipe (6), a first electric butterfly valve (7), a second electric butterfly valve (8), a third electric butterfly valve (9), a fourth electric butterfly valve (10) and a granary (11), and is characterized in that the inlet of the first electric butterfly valve is connected with the outlet of the granary through a pipeline, the inlet of the second electric butterfly valve is communicated with air, the outlet of the first electric butterfly valve and the outlet of the second electric butterfly valve are connected with the inlet of the variable frequency fan through pipelines, the outlet of the variable frequency fan is connected with the inlet of the third electric butterfly valve and the inlet of the fourth electric butterfly valve through pipelines, the outlet of the fourth electric butterfly valve is connected with the inlet of the granary through a pipeline, the outlet of the third electric butterfly valve is communicated with air, the pressure sensor is connected with a granary through an air pipe, the frequency conversion fan is connected with the frequency converter through a cable, the frequency converter is connected with the programmable logic controller through an RS485 communication mode to realize data transmission, and the touch screen is connected with the programmable logic controller through an Ethernet communication mode to realize data interaction.
2. The granary airtightness detection control system according to claim 1, wherein: the control system is used for realizing logic control through the programmable logic controller (1), the second electric butterfly valve (8) and the fourth electric butterfly valve (10) are opened, the first electric butterfly valve (7) and the third electric butterfly valve (9) are closed, the variable frequency fan (4) is started, and the positive pressure detection function of the air tightness of the granary can be realized.
3. The granary airtightness detection control system according to claim 1, wherein: the control system is used for realizing logic control through the programmable logic controller (1), the first electric butterfly valve (7) and the third electric butterfly valve (9) are opened, the second electric butterfly valve (8) and the fourth electric butterfly valve (10) are closed, the variable frequency fan (4) is started, and the negative pressure detection function of the air tightness of the granary can be realized.
4. The granary airtightness detection control system according to claim 1, wherein: the granary airtightness detection control system can display granary airtightness grade and pressure half-life time on the touch screen (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122223392.6U CN216160089U (en) | 2021-09-13 | 2021-09-13 | Granary gas tightness detects control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122223392.6U CN216160089U (en) | 2021-09-13 | 2021-09-13 | Granary gas tightness detects control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216160089U true CN216160089U (en) | 2022-04-01 |
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ID=80849687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122223392.6U Active CN216160089U (en) | 2021-09-13 | 2021-09-13 | Granary gas tightness detects control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216160089U (en) |
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2021
- 2021-09-13 CN CN202122223392.6U patent/CN216160089U/en active Active
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