Intelligent nitrogen charging system for granary

Abstract

The utility model relates to the field of granary monitoring, in particular to an intelligent granary nitrogen charging system which comprises a control module, and a nitrogen generation module, a flow regulation module, a gas monitoring module, an air tightness monitoring module, a safety protection module, an alarm module, a display module and a communication module which are electrically connected with the control module, the flow adjusting module comprises a thermal gas flowmeter and an electric adjusting valve, the gas monitoring module comprises an oxygen sensor and a nitrogen sensor, the safety protection module comprises a circuit breaker and a relay, and automatic and intelligent control over granary nitrogen charging is achieved through real-time monitoring and control.

Description

Technical Field

[0001] The utility model relates to the technical field of granary monitoring, in particular to an intelligent nitrogen filling system for a granary. Background Art

[0002] In the process of grain storage, flushing nitrogen into the granary is a common storage technology. Nitrogen can replace oxygen in the granary, reduce the respiration of grain, reduce the metabolic rate of grain, maintain the freshness of grain, and extend the storage life of grain. At the same time, flushing nitrogen into the granary can inhibit the growth of mold and other microorganisms, prevent grain from mildewing, and the low-oxidation environment can reduce the activity and reproduction of pests.

[0003] During the nitrogen filling process of the granary, it is necessary to ensure the sealing of the granary so that the nitrogen can enter the granary at a suitable speed and amount to avoid nitrogen waste and safety hazards. At present, the nitrogen filling of the granary is mainly carried out by using a nitrogen generator to produce nitrogen and then introducing the nitrogen into the granary through a conduit. However, this method can only control the opening and closing of nitrogen filling, and cannot be intelligently adjusted according to the real-time value of the gas concentration in the granary. At the same time, during the nitrogen filling process, the airtightness of the granary is generally no longer concerned.

[0004] In addition, the existing nitrogen filling system has a low degree of automation, and if the nitrogen filling system fails, it is difficult to respond quickly. Utility Model Content

[0005] The utility model provides an intelligent nitrogen filling system for a granary.

[0006] The technical solution of this utility model is as follows:

[0007] An intelligent nitrogen filling system for a granary comprises a control module, a nitrogen production module electrically connected to the control module, a flow regulating module, a gas monitoring module, an air tightness monitoring module, a safety protection module, an alarm module, a display module and a communication module.

[0008] The flow regulating module includes a thermal gas flow meter and an electric regulating valve, both of which are electrically connected to the control module.

[0009] The gas monitoring module includes an oxygen sensor and a nitrogen sensor, both of which are electrically connected to the control module.

[0010] The safety protection module includes a circuit breaker and a relay, both of which are electrically connected to the control module.

[0011] Specifically, the nitrogen production module includes an air compressor, a nitrogen generator and a purification device which are sequentially connected by pipelines and are all electrically connected to a control module.

[0012] Specifically, the air tightness monitoring module is a piezoelectric gas sensor, which includes two elastic diaphragms and a piezoelectric element arranged between the two elastic diaphragms.

[0013] Furthermore, the relay is an electromagnetic relay, including contacts, an electromagnetic coil and an iron core in the electromagnetic coil, all of which are electrically connected to the control module.

[0014] Specifically, the circuit breaker is an air circuit breaker, including a moving contact, a stationary contact and an arc extinguishing chamber, all of which are electrically connected to the control module.

[0015] Specifically, the alarm module includes a piezoelectric buzzer and an LED indicator light.

[0016] Preferably, the communication module is provided with an SPI communication interface and a Wi-Fi communication interface.

[0017] Specifically, the thermal gas flow meter includes a velocity sensor and a temperature sensor.

[0018] Preferably, the control module is a PLC controller.

[0019] Preferably, the display module is an LCD touch screen.

[0020] The beneficial effects of the utility model are:

[0021] (1) The utility model is an intelligent nitrogen filling system for granaries, which realizes the automated control of nitrogen preparation, nitrogen filling, and gas monitoring in the granary, reduces manual intervention, and improves nitrogen filling efficiency. The system can quickly respond to changes in the gas environment inside the granary and make real-time adjustments to ensure the continuity and efficiency of nitrogen filling.

[0022] (2) The nitrogen concentration and gas pressure in the granary are monitored in real time, and the monitoring results are remotely transmitted through the communication module to achieve intelligent control of the nitrogen filling process and avoid waste of resources.

[0023] (3) The safety protection module and the alarm module of the utility model cooperate with each other and can respond quickly when a failure occurs in the nitrogen filling system, thereby improving the safety and reliability of the nitrogen filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0025] In the attached picture:

[0026] Figure 1It is a structural schematic diagram of an intelligent nitrogen filling system for a granary in an embodiment. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0028] Example

[0029] This embodiment provides a grain silo intelligent nitrogen filling system, see Figure 1 , including a control module, a nitrogen production module, a flow regulating module, a gas monitoring module, a gas tightness monitoring module, a safety protection module, an alarm module, a display module and a communication module which are all electrically connected to the control module,

[0030] The flow regulating module includes a thermal gas flow meter and an electric regulating valve, both of which are electrically connected to the control module.

[0031] The gas monitoring module includes an oxygen sensor and a nitrogen sensor, both of which are electrically connected to the control module.

[0032] The safety protection module includes a circuit breaker and a relay, both of which are electrically connected to the control module.

[0033] Specifically, in the utility model, the control module is the control center of the entire granary intelligent nitrogen filling system, which is used to coordinate and control other functional modules, and is responsible for receiving data from other functional modules and sending instructions to each functional module. The control module used in the utility model is a PLC controller, which has high reliability and is easy to program.

[0034] The nitrogen production module is used to provide pure nitrogen to the granary to prevent the grain from mildewing. The nitrogen production module is arranged outside the granary. The nitrogen production module includes an air compressor, a nitrogen generator and a purification device connected in sequence by pipelines, and all are electrically connected to the control module. The air compressor is used to compress the ambient air, the nitrogen generator is used to separate nitrogen from the compressed air, and the purification device is used to remove impurities to obtain high-purity nitrogen. The high-purity nitrogen obtained by the nitrogen production module is transported to the inside of the granary through a pipeline to provide pure nitrogen to the granary.

[0035] The flow regulating module is used to measure and control the flow of the nitrogen gas. The flow regulating module includes a thermal gas flow meter and an electric regulating valve, both of which are electrically connected to the control module. Among them, the thermal gas flow meter is used to monitor the flow of nitrogen gas, and is set on the pipeline through which the nitrogen gas flows. The thermal gas flow meter includes two thermal resistors, one is a speed sensor, and the other is a temperature sensor. The temperature sensor is used to measure the actual temperature of the nitrogen gas flowing. The temperature of the speed sensor is higher than the temperature of the nitrogen gas. When the nitrogen gas flows, the temperature of the speed sensor decreases, and the temperature decrease is proportional to the nitrogen gas flow rate. The flow regulating module transmits the monitored temperature change signal to the remote granary control center through the control unit to obtain the real-time flow of the nitrogen gas; the electric regulating valve is controlled by the control module to realize the intelligent regulation of the nitrogen gas flow rate.

[0036] The air tightness monitoring module is a piezoelectric gas sensor, which includes two elastic diaphragms and a piezoelectric element arranged between the two elastic diaphragms. The piezoelectric gas sensor is set at different positions inside the granary, including: the granary wall, the top of the granary, the entrance and exit of the granary. When nitrogen is rushed into the granary, the gas pressure inside the granary will remain in a relatively stable state. If there is a problem with the sealing of the granary, the internal pressure will change, and the two elastic diaphragms will be deformed by the pressure inside the granary, causing the piezoelectric element between the two elastic diaphragms to produce an electrical signal change. The air tightness monitoring module transmits the generated electrical signal change to the control module, and the control module further transmits the received signal to the remote granary monitoring center through the communication module.

[0037] The gas monitoring module includes an oxygen sensor and a nitrogen sensor, both of which are electrically connected to the control module. The oxygen sensor is used to monitor the oxygen concentration in the granary in real time, and the nitrogen sensor is used to monitor the nitrogen concentration in the granary in real time. In this embodiment, the oxygen sensor and nitrogen sensor used are both set in a transparent packaging shell, and the transparent packaging shell is inserted deep into the granary to monitor the gas concentration. The transparent packaging shell is provided with air holes, so that the oxygen sensor and nitrogen sensor set in the transparent packaging shell can interact with the gas environment in the granary, ensuring the accuracy of the monitoring of the oxygen concentration and nitrogen concentration in the granary. There are several transparent packaging shells with integrated oxygen sensors and nitrogen sensors, which are evenly distributed in the granary, to achieve full coverage of the gas concentration monitoring in the granary and ensure the monitoring effect.

[0038] The safety protection module includes a circuit breaker and a relay, both of which are electrically connected to the control module. The relay is used to remotely control the connection and disconnection of the circuit. The relay is an electromagnetic relay, including contacts, electromagnetic coils, and iron cores in the electromagnetic coils, all of which are electrically connected to the control module. The remote granary monitoring center sends instructions to the control module through the communication module based on the monitoring results. The control module sends instructions to the safety protection module, and controls the electromagnetic coil to drive the contact action to achieve the switch control of the circuit.

[0039] The circuit breaker is used to automatically cut off the power supply when the system is overloaded or fails. The circuit breaker is an air circuit breaker, including a moving contact, a stationary contact and an arc extinguishing chamber, all of which are electrically connected to the control module. When a system circuit fails, the control module controls the separation between the moving contact and the stationary contact to automatically cut off the circuit. The arc extinguishing chamber is used to extinguish the arc generated when the circuit is cut off.

[0040] The alarm module includes a piezoelectric buzzer and an LED indicator light. When any functional module of the safety protection module, gas monitoring module, flow regulation module and air tightness monitoring module in the intelligent nitrogen filling system of the granary detects an abnormal situation and transmits the abnormal signal to the control module, the control module will send a command to the alarm module, the piezoelectric buzzer in the alarm module will sound, and the LED indicator light will flash, reminding the warehouse monitoring personnel to deal with it in time.

[0041] The display module is an LCD touch screen, which is used to display the gas concentration, flow, pressure and other parameters in the granary in real time, as well as the system's operating status and fault information. The operator can also set parameters on the LCD touch screen and control the system through the buttons next to the display module.

[0042] The communication module is equipped with an SPI communication interface and a Wi-Fi communication interface. The SPI communication interface is used for data transmission and exchange with other functional modules in the system, and the Wi-Fi communication interface is used to upload the signals and data monitored by the system to the remote granary monitoring center to realize remote monitoring and management.

[0043] The utility model provides an intelligent nitrogen filling system for a granary, which can improve the safety, accuracy and automation during the nitrogen injection process, reduce manual intervention, and improve the nitrogen filling efficiency. Through real-time monitoring and intelligent adjustment, the intelligent nitrogen filling system for the granary can effectively control the gas environment in the granary and extend the storage life of grain.

Claims

1. An intelligent nitrogen filling system for granaries, characterized in that: It includes a control module, a nitrogen production module, a flow control module, a gas monitoring module, a gas tightness monitoring module, a safety protection module, an alarm module, a display module and a communication module which are all electrically connected to the control module. The flow regulating module includes a thermal gas flow meter and an electric regulating valve, both of which are electrically connected to the control module. The gas monitoring module includes an oxygen sensor and a nitrogen sensor, both of which are electrically connected to the control module. The safety protection module includes a circuit breaker and a relay, both of which are electrically connected to the control module.

2. The intelligent nitrogen filling system for granary according to claim 1 is characterized in that: The nitrogen production module comprises an air compressor, a nitrogen generator and a purification device which are sequentially connected by pipelines and are all electrically connected to a control module.

3. The intelligent nitrogen filling system for granary according to claim 1 is characterized in that: The air tightness monitoring module is a piezoelectric gas sensor, which includes two elastic diaphragms and a piezoelectric element arranged between the two elastic diaphragms.

4. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The relay is an electromagnetic relay, including contacts, an electromagnetic coil and an iron core in the electromagnetic coil, all of which are electrically connected to the control module.

5. The intelligent nitrogen filling system for granary according to claim 1 is characterized in that: The circuit breaker is an air circuit breaker, comprising a moving contact, a stationary contact and an arc extinguishing chamber, all of which are electrically connected to the control module.

6. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The alarm module includes a piezoelectric buzzer and an LED indicator light.

7. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The communication module is provided with an SPI communication interface and a Wi-Fi communication interface.

8. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The thermal gas flow meter includes a velocity sensor and a temperature sensor.

9. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The control module is a PLC controller.

10. The intelligent nitrogen filling system for granary according to claim 1, characterized in that: The display module is an LCD touch screen.

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