An automated grain bin tightness detection device

Abstract

The application relates to an automatic granary sealing detection device, which comprises a moving vehicle body and an air inlet electric butterfly valve, an explosion-proof centrifugal fan, an air outlet electric butterfly valve and an electric control box arranged on the moving vehicle body in sequence. A PLC control module is arranged in the electric control box. The air inlet electric butterfly valve is connected to an air inlet of the explosion-proof centrifugal fan. One end of the air outlet electric butterfly valve is connected to an air outlet of the explosion-proof centrifugal fan. The other end of the air outlet electric butterfly valve is connected to a ventilation opening of the granary. An air pressure sensor is arranged in the granary. The air inlet electric butterfly valve, the explosion-proof centrifugal fan, the air outlet electric butterfly valve and the air pressure sensor are electrically connected to the PLC control module. The application has the effect of conveniently detecting the sealing performance of the granary.

Description

Technical Field

[0001] This application relates to the field of grain storage, and in particular to an automated grain storage sealing detection device. Background Technology

[0002] The airtightness of grain silos is one of the key factors in ensuring the quality of stored grain. Good airtightness can effectively prevent external moisture and pests from entering the silo, while also facilitating the control of the gas environment inside the silo to achieve grain preservation. Therefore, airtightness testing of grain silos is an important part of the daily management of grain depots and the acceptance of new and renovated warehouses.

[0003] Currently, traditional grain silo airtightness testing relies heavily on manual operation of tools such as stopwatches and U-meters. This method is not only cumbersome and inefficient, but also prone to inaccuracies due to human error in timing and reading deviations, failing to meet the precision and standardization requirements of modern grain depots. Furthermore, grain silos often contain flammable and explosive hazards such as dust, and traditional testing equipment lacks specific safety designs, posing certain safety risks and exhibiting poor adaptability during use.

[0004] To address the aforementioned issues, a grain silo airtightness testing device is needed that can automate testing, improve testing accuracy, and possess good safety and adaptability. This device should be adaptable to different types of warehouses, simplify operating procedures, reduce human intervention, and ensure stable and reliable airtightness testing under the special environment of grain silos, thus providing strong protection for safe grain storage. Utility Model Content

[0005] The purpose of this utility model is to provide an automated grain silo sealing test device to facilitate the testing of grain silo sealing performance.

[0006] To achieve the above objectives, the automated grain silo sealing detection device provided in this application adopts the following technical solution:

[0007] An automated grain silo sealing detection device includes a mobile vehicle and, sequentially mounted on the mobile vehicle, an inlet electric butterfly valve, an explosion-proof centrifugal fan, an outlet electric butterfly valve, and an electrical control box. The electrical control box contains a PLC control module. The inlet electric butterfly valve is connected to the air inlet of the explosion-proof centrifugal fan, one end of the outlet electric butterfly valve is connected to the air outlet of the explosion-proof centrifugal fan, and the other end of the outlet electric butterfly valve is connected to the vent of the grain silo. A wind pressure sensor is installed inside the grain silo. The inlet electric butterfly valve, the explosion-proof centrifugal fan, the outlet electric butterfly valve, and the wind pressure sensor are electrically connected to the PLC control module.

[0008] Preferably, the electrical control box is equipped with a power supply module, which includes an AC380V input terminal and a main switch connected to the AC380V input terminal. The output terminal of the main switch is connected to a phase sequence protector and an isolation transformer, respectively. The secondary side of the isolation transformer is connected to a DC power supply module, which outputs a DC24V voltage and is electrically connected to the PLC control module.

[0009] Preferably, the explosion-proof centrifugal fan and the PLC control module are connected via a fan control circuit. The fan control circuit includes a first contactor and a thermal relay. The coil of the first contactor is connected to the output terminal of the PLC control module. The main contacts of the first contactor are connected in series in the power supply circuit of the explosion-proof centrifugal fan. The thermal relay is connected in series between the explosion-proof centrifugal fan and the AC380V input terminal, and the normally closed contact of the thermal relay is connected to the input terminal of the PLC control module.

[0010] Preferably, an air inlet electric butterfly valve is connected to the PLC control module via an air inlet valve control circuit. The air inlet valve control circuit includes a second contactor and a third contactor, the coils of which are respectively connected to the output terminal of the PLC control module. Similarly, an air outlet electric butterfly valve is connected to the PLC control module via an air outlet valve control circuit, the air outlet valve control circuit including a fourth contactor and a fifth contactor, the coils of which are respectively connected to the output terminal of the PLC control module.

[0011] Preferably, both the air inlet electric butterfly valve and the air outlet electric butterfly valve are equipped with position detection sensors. The position detection sensors include an open position sensor and a closed position sensor, which are respectively connected to the input terminal of the PLC control module.

[0012] Preferably, the electrical control box is further provided with a display module, which has a built-in HMI (Human Machine Interface) and is connected to the PLC control module via an RS 485 communication interface.

[0013] Preferably, the electrical control box is also equipped with an alarm device, which is connected to the output terminal of the PLC control module, and the input terminal of the PLC control module is connected to a fault detection device.

[0014] Preferably, a connecting component is provided between the air outlet of the electric butterfly valve and the ventilation opening of the grain silo.

[0015] Preferably, the connecting assembly includes a connecting pipe and a connecting flange, the connecting pipe is fixedly connected to the connecting flange, the end of the connecting pipe away from the connecting flange is fixedly connected to the air outlet electric butterfly valve, and the connecting flange is fixedly connected to the vent of the grain silo.

[0016] Preferably, the connection assembly includes a magnetic lock and a sealing silicone gasket. The magnetic lock is disposed on the connection flange, and the sealing silicone gasket is disposed at the end of the connection flange facing the vent of the grain silo. The magnetic lock is electrically connected to the electrical control box.

[0017] Compared with the prior art, this utility model provides an automated grain silo sealing detection device, which has the following beneficial effects:

[0018] 1. It adopts explosion-proof components such as explosion-proof centrifugal fans, explosion-proof electric airtight butterfly valves, and explosion-proof intelligent electrical control boxes, which can effectively adapt to the special environment of dust in grain warehouses, greatly reduce potential safety risks, and ensure the safe and stable conduct of the testing process. At the same time, it can be moved by a mobile vehicle, which is highly flexible.

[0019] 2. The PLC control module in the explosion-proof intelligent electrical control box enables intelligent control of the fan and valves, supporting multiple functions such as manual detection, automatic detection, and positive and negative pressure detection. It overcomes the errors caused by traditional manual operation of stopwatches and U-shaped meters, making the airtightness detection of grain silos more efficient and accurate, while improving operational efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an automated grain warehouse sealing detection device according to an embodiment of this application.

[0021] Figure 2 This is a structural schematic diagram from another perspective of an automated grain warehouse sealing detection device according to an embodiment of this application.

[0022] Figure 3 This is a cross-sectional structural diagram of the fit between the connecting flange and the ventilation opening of the grain warehouse in Embodiment 2 of the application for an automated grain warehouse sealing test device.

[0023] Figure 4 This is an electrical schematic diagram of an automated grain warehouse sealing detection device according to an embodiment of this application.

[0024] Figure 5 This is an electrical schematic diagram of an automated grain warehouse sealing detection device according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Mobile vehicle body; 2. Electric inlet butterfly valve; 3. Explosion-proof centrifugal fan; 4. Electric outlet butterfly valve; 5. Electrical control box; 6. PLC control module; 7. DC power supply module; 8. Fan control circuit; 9. Inlet valve control circuit; 10. Outlet valve control circuit; 11. Connecting assembly; 111. Connecting pipe; 112. Connecting flange; 1121. Plug-in part; 113. Magnetic lock; 114. Sealing silicone gasket; 12. Caster wheel; 13. First hose clamp; 14. Second hose clamp; 15. Raised ring; 16. Annular groove; 17. Push handle. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses an automated grain silo sealing performance testing device. (Refer to...) Figure 1 and Figure 2 An automated grain silo sealing detection device includes a mobile vehicle 1 and an inlet electric butterfly valve 2, an explosion-proof centrifugal fan 3, an outlet electric butterfly valve 4, and an electrical control box 5, which are sequentially arranged on the mobile vehicle 1. The electrical control box 5 is equipped with a PLC control module 6. The inlet electric butterfly valve 2 is connected to the air inlet of the explosion-proof centrifugal fan 3. One end of the outlet electric butterfly valve 4 is connected to the air outlet of the explosion-proof centrifugal fan 3, and the other end of the outlet electric butterfly valve 4 is connected to the ventilation opening of the grain silo. A wind pressure sensor is installed inside the grain silo. The inlet electric butterfly valve 2, the explosion-proof centrifugal fan 3, the outlet electric butterfly valve 4, the wind pressure sensor, and the PLC control module 6 are electrically connected.

[0028] Specifically, the mobile vehicle body 1 has casters 12 installed in a rectangular array at the corners of the surface opposite to where the explosion-proof centrifugal fan 3 is located. A pusher 17 is installed on the side wall of the mobile vehicle body 1, which can push the mobile vehicle body 1. At this time, the casters 12 will rotate along the ground to achieve the purpose of the mobile vehicle body 1 being able to move flexibly.

[0029] Furthermore, the pusher 17 is fixedly connected to the mobile vehicle body 1 by bending and welding metal material, and the electrical control box 5 is installed on the surface of the mobile vehicle body 1 near the pusher 17. The explosion-proof centrifugal fan 3 is located on the mobile vehicle body 1 on one side of the electrical control box 5 to improve the space utilization of the mobile vehicle body 1.

[0030] Correspondingly, a connecting component 11 is provided between the air outlet of the electric butterfly valve 4 and the ventilation opening of the grain silo.

[0031] Example 1

[0032] Reference Figure 1The connecting assembly 11 includes a connecting pipe 111 and a connecting flange 112. The connecting pipe 111 is fixedly connected to the connecting flange 112. The end of the connecting pipe 111 away from the connection to the connecting flange 112 is fixedly connected to the air outlet electric butterfly valve 4. The connecting flange 112 is fixedly connected to the ventilation opening of the grain silo.

[0033] Specifically, the connecting pipe 111 can be a flexible hose or a corrugated pipe, giving it a telescopic characteristic. The connecting pipe 111 connects the connecting flange 112 and the electric butterfly valve 4. A first hose clamp 13 is fitted onto the end of the connecting pipe 111 facing the electric butterfly valve 4. After the connecting pipe 111 is fitted onto the air outlet of the electric butterfly valve 4, the first hose clamp 13 fixes the connecting pipe 111, so that the connecting pipe 111 can be securely fastened to the air outlet of the electric butterfly valve 4.

[0034] Furthermore, a second hose clamp 14 is fitted onto one end of the connecting pipe 111 near the connecting flange 112. By adjusting the second hose clamp 14, the connecting pipe 111 can be fastened to the connecting flange 112. Thus, through the cooperation of the first hose clamp 13 and the second hose clamp 14, the connecting pipe 111 can be disassembled along the connecting flange 112 and the air outlet electric butterfly valve 4, so as to facilitate the replacement of the connecting pipe 111 and the storage of the connecting pipe 111 connected to the connecting flange 112.

[0035] Correspondingly, the connecting flange 112 can be directly threaded to the ventilation opening of the grain silo, or the connecting flange 112 has bolt holes that run through the circumference on its surface, and the connecting flange 112 can be fixedly connected to the ventilation opening of the grain silo through the bolt holes.

[0036] The implementation principle of Example 1 is as follows: by cooperating with the connecting hose and the connecting flange 112, a fixed connection with the ventilation opening of the grain silo is achieved, so as to fill the grain silo with gas. After use, the connecting flange 112 can be placed on the mobile vehicle 1 for easy storage.

[0037] Example 2

[0038] The difference between Example 2 and Example 1 is that, referring to... Figure 1 and Figure 3 The connecting assembly 11 includes a magnetic lock 113 and a sealing silicone gasket 114. The magnetic lock 113 is disposed on the connecting flange 112, and the sealing silicone gasket 114 is disposed at the end of the connecting flange 112 facing the vent of the grain silo. The magnetic lock 113 is electrically connected to the electrical control box 5.

[0039] Specifically, the connecting flange 112 has a protruding end face forming a plug part 1121 that has a transitional fit with the inner diameter tolerance of the grain silo's ventilation opening. When connecting the connecting flange 112 to the grain silo's ventilation opening, inserting the plug part 1121 into the grain silo's ventilation opening can achieve rapid positioning of the connecting flange 112 and the grain silo's ventilation opening.

[0040] Furthermore, a raised ring 15 is provided circumferentially on the surface of the connecting flange 112 that abuts against the end face of the vent of the grain silo. Correspondingly, an annular groove 16 is provided circumferentially on the surface of the vent of the grain silo that abuts against the end face of the connecting flange 112. When the connecting flange 112 abuts against the vent of the grain silo, the raised ring 15 is located in the annular groove 16.

[0041] It should be noted that the magnetic lock 113 is a device that uses the principle of generating a magnetic field by passing an electric current through a coil, thereby generating a magnetic attraction or magnetic repulsion force. When the magnetic lock 113 is energized, it can attract an ferrous or magnetic object. When the magnetic lock 113 is de-energized, the attraction between the magnetic lock 113 and the ferrous or magnetic object disappears. This is existing technology and will not be elaborated further here.

[0042] Therefore, when the connecting flange 112 comes into contact with the vent of the grain silo, the magnetic lock 113 is activated. The magnetic lock 113 is energized, and the generated electromagnetic force magnetically connects the connecting flange 112 and the vent of the grain silo. At the same time, the sealing silicone gasket 114 is soft and easily deformable. At the moment when the connecting flange 112 and the vent of the grain silo are attracted together, the sealing silicone gasket 114 is driven to deform to fill the gap between the connecting flange 112 and the vent of the grain silo, thereby improving the sealing ability of the connecting flange 112 and the vent of the grain silo.

[0043] The implementation principle of Example 2 is as follows: when it is necessary to fix the connection between the connecting flange 112 and the ventilation opening of the grain silo, it is only necessary to control the magnetic lock 113 to be energized; at the same time, when it is necessary to disassemble the connecting flange 112 along the ventilation opening of the grain silo, it is only necessary to control the magnetic lock 113 to be de-energized, which is simple to operate.

[0044] Reference Figure 4 and Figure 5 The electrical control box 5 is equipped with a power supply module, which includes an AC380V input terminal and a main switch connected to the AC380V input terminal. The output terminals of the main switch are respectively connected to a phase sequence protector and an isolation transformer. The secondary side of the isolation transformer is connected to a DC power supply module 7, which outputs a DC24V voltage and is electrically connected to the PLC control module 6.

[0045] Specifically, the PLC control module 6 is model LX3V-1208MR-A1, the main switch is set to QF1 (model: NXB-633P C20), the phase sequence protector is set to KV (model: XJ3-G / AC380V), the isolation transformer is set to TC, and the DC power supply module 7 is set to PS (model: EDR-75-24). The output of the main switch QF1 is divided into two paths: one path is connected to the phase sequence protector KV to detect the power phase sequence, and the other path is connected to the isolation transformer TC to achieve power isolation. The output of the isolation transformer TC is connected to the DC power supply module 7PS, and the DC power supply module 7PS outputs DC24V power.

[0046] Furthermore, the explosion-proof centrifugal fan 3 is connected to the PLC control module 6 via a fan control circuit 8. The fan control circuit 8 includes a first contactor KM1 and a thermal relay FR1 (model: NXR, 7-10A). The coil of the first contactor KM1 is connected to the output terminal of the PLC control module 6, and the coil of the first contactor KM1 is connected to the X1 pin of the PLC control module 6. The main contacts of the first contactor KM1 are connected in series in the power supply circuit of the explosion-proof centrifugal fan 3. The thermal relay FR1 is connected in series between the explosion-proof centrifugal fan 3 and the AC380V input terminal, and the normally closed contact of the thermal relay FR1 is connected to the input terminal of the PLC control module 6. The start and stop of the explosion-proof centrifugal fan 3 are controlled by the on / off state of the first contactor KM1. Simultaneously, when the explosion-proof centrifugal fan 3 is overloaded, the thermal relay FR1 activates and feeds back a fault signal to the PLC control module 6.

[0047] Meanwhile, an air intake electric butterfly valve 2 is connected to the PLC control module 6 via an air intake valve control circuit 9. The air intake valve control circuit 9 includes a second contactor KM2 and a third contactor KM3. The second contactor KM2 is used to control the opening of the air intake electric butterfly valve 2, and the third contactor KM3 is used to control the closing of the air intake electric butterfly valve 2. The coils of the second contactor KM2 and the third contactor KM3 are respectively connected to the output terminal of the PLC control module 6. The coil of the second contactor KM3 is connected to the Y2 pin of the PLC control module 6, and the coil of the third contactor KM3 is connected to the Y1 pin of the PLC control module 6.

[0048] In this system, one end of the second contactor KM2 is connected to the secondary side of the isolation transformer TC, and the other end is connected to the air intake electric butterfly valve 2. A first fuse FU1 is connected in series between the second contactor KM2 and the isolation transformer TC to prevent excessive voltage or current flowing into the air intake electric butterfly valve 2, which could damage the valve. The third contactor KM3 is connected in parallel between the first fuse FU1 and the air intake electric butterfly valve 2. Through the cooperation of the third contactor KM3 and the second contactor KM2, the purpose of controlling the start and stop of the air intake electric butterfly valve 2 is achieved.

[0049] Correspondingly, an air outlet electric butterfly valve 4 is connected to the PLC control module 6 via an air outlet valve control circuit 10. The air outlet valve control circuit 10 includes a fourth contactor KM4 and a fifth contactor KM5. The fourth contactor KM4 is used to control the opening of the air outlet electric butterfly valve 4, and the fifth contactor KM5 is used to control the closing of the air outlet electric butterfly valve 4. The coils of the fourth contactor KM4 and the fifth contactor KM5 are respectively connected to the output terminal of the PLC control module 6. Specifically, the coil of the fourth contactor KM4 is connected to the Y4 pin of the PLC control module 6, and the coil of the fifth contactor KM5 is connected to the Y3 pin of the PLC control module 6.

[0050] The fourth contactor KM4 is connected at one end to the secondary side of the isolation transformer TC located at the rear end of the electric butterfly valve 4, and at the other end to the electric butterfly valve 4. The fourth contactor KM4 and the isolation transformer TC are connected in series with the second fuse FU2. The fifth contactor KM5 is connected in parallel between the second fuse FU2 and the electric butterfly valve 4. Through the cooperation of the fourth contactor KM4 and the fifth contactor KM5, the purpose of controlling the start and stop of the electric butterfly valve 4 is achieved.

[0051] Meanwhile, both the inlet electric butterfly valve 2 and the outlet electric butterfly valve 4 are equipped with position detection sensors. Since the position detection sensors connected to the inlet electric butterfly valve 2 and the outlet electric butterfly valve 4 are of the same model and have the same connection method, for ease of explanation, the position detection sensor located on the inlet electric butterfly valve 2 will be described in detail below. The position detection sensors include an open position sensor and a closed position sensor. The open and closed position sensors are respectively connected to the input terminals of the PLC control module 6, used to feed back the valve open and closed position signals of the inlet electric butterfly valve 2 to the PLC control module 6. Specifically, the open position sensor is connected to pin X3 of the PLC control module 6, and the closed position sensor is connected to pin X4 of the PLC control module 6.

[0052] Reference Figure 4 and Figure 5 The electrical control box 5 is also equipped with a display module. The display module has a built-in HMI (Human Machine Interface) and is connected to the PLC control module 6 via an RS 485 communication interface. This allows the user to monitor the working status of the explosion-proof centrifugal fan 3, the inlet electric butterfly valve 2, and the outlet electric butterfly valve 4 in real time on the HMI.

[0053] Correspondingly, an alarm device BZ is installed in the electrical control box 5. The alarm device BZ is connected to the output terminal of the PLC control module 6. The alarm device BZ is connected to the Y5 pin of the PLC control module 6. When the fault detection device detects an abnormal signal, the PLC control module 6 will control the alarm device BZ to be turned on to issue an alarm.

[0054] Therefore, when it is necessary to test the airtightness of the grain silo, the manual, automatic, or positive / negative pressure testing mode can be selected through the HMI (Human Machine Interface). The command is transmitted to the PLC control module 6 through the RS 485 communication interface. The PLC control module 6 controls the first contactor KM1 to conduct, thereby starting the explosion-proof centrifugal fan 3. At the same time, when the explosion-proof centrifugal fan 3 is working, the PLC control module 6 controls the second contactor KM2 to conduct and the third contactor KM3 to open. At this time, the inlet electric butterfly valve 2 starts to work. Simultaneously, the fourth contactor KM4 conducts and the fifth contactor KM5 opens, at which time the outlet electric butterfly valve 4 starts to work, filling the vent of the grain silo with gas. At the same time, the air pressure sensor located in the grain silo detects the air pressure inside the grain silo. When it is not necessary to fill the vent of the grain silo with gas, the PLC control module 6 controls the explosion-proof electric butterfly valve to stop working. At the same time, the inlet electric butterfly valve 2 and the outlet electric butterfly valve 4 close synchronously. At this time, the vent of the grain silo and the outlet electric butterfly valve 4 are in a sealed state.

[0055] Because the wind pressure sensor and PLC control module 6 are electrically connected, the air pressure change value inside the grain silo can be observed in real time through the HMI human-machine interface, thereby achieving the purpose of measuring the sealing performance of the grain silo, which is easy to operate.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automated grain silo sealing test device, characterized in that: The device includes a mobile vehicle body (1) and an air inlet electric butterfly valve (2), an explosion-proof centrifugal fan (3), an air outlet electric butterfly valve (4), and an electrical control box (5) sequentially arranged on the mobile vehicle body (1). The electrical control box (5) is equipped with a PLC control module (6). The air inlet electric butterfly valve (2) is connected to the air inlet of the explosion-proof centrifugal fan (3). One end of the air outlet electric butterfly valve (4) is connected to the air outlet of the explosion-proof centrifugal fan (3), and the other end of the air outlet electric butterfly valve (4) is connected to the ventilation opening of the grain silo. A wind pressure sensor is installed in the grain silo. The air inlet electric butterfly valve (2), the explosion-proof centrifugal fan (3), the air outlet electric butterfly valve (4), the wind pressure sensor, and the PLC control module (6) are electrically connected.

2. The automated grain silo sealing detection device according to claim 1, characterized in that: The electrical control box (5) is equipped with a power supply module. The power supply module includes an AC380V input terminal and a main switch connected to the AC380V input terminal. The output terminal of the main switch is connected to a phase sequence protector and an isolation transformer. The secondary side of the isolation transformer is connected to a DC power supply module (7). The DC power supply module (7) outputs a DC24V voltage and is electrically connected to the PLC control module (6).

3. The automated grain silo sealing detection device according to claim 2, characterized in that: The explosion-proof centrifugal fan (3) is connected to the PLC control module (6) through a fan control circuit (8). The fan control circuit (8) includes a first contactor and a thermal relay. The coil of the first contactor is connected to the output terminal of the PLC control module (6). The main contact of the first contactor is connected in series in the power supply circuit of the explosion-proof centrifugal fan (3). The thermal relay is connected in series between the explosion-proof centrifugal fan (3) and the AC380V input terminal. The normally closed contact of the thermal relay is connected to the input terminal of the PLC control module (6).

4. The automated grain silo sealing detection device according to claim 3, characterized in that: An air inlet electric butterfly valve (2) is connected to the PLC control module (6) via an air inlet valve control circuit (9). The air inlet valve control circuit (9) includes a second contactor and a third contactor. The coils of the second contactor and the third contactor are respectively connected to the output terminal of the PLC control module (6). An air outlet electric butterfly valve (4) is connected to the PLC control module (6) via an air outlet valve control circuit (10). The air outlet valve control circuit (10) includes a fourth contactor and a fifth contactor. The coils of the fourth contactor and the fifth contactor are respectively connected to the output terminal of the PLC control module (6).

5. The automated grain silo sealing detection device according to claim 4, characterized in that: Both the air inlet electric butterfly valve (2) and the air outlet electric butterfly valve (4) are equipped with position detection sensors. The position detection sensors include an open position sensor and a closed position sensor. The open position sensor and the closed position sensor are respectively connected to the input terminal of the PLC control module (6).

6. The automated grain silo sealing detection device according to claim 2, characterized in that: The electrical control box (5) is also equipped with a display module. The display module has a built-in HMI human-machine interface and is connected to the PLC control module (6) through an RS 485 communication interface.

7. The automated grain silo sealing detection device according to claim 3, characterized in that: An alarm device is also installed inside the electrical control box (5). The alarm device is connected to the output terminal of the PLC control module (6). A fault detection device is connected to the input terminal of the PLC control module (6).

8. The automated grain silo sealing detection device according to claim 1, characterized in that: A connecting component (11) is provided between the air outlet of the electric butterfly valve (4) and the ventilation opening of the grain silo.

9. An automated grain silo sealing detection device according to claim 8, characterized in that: The connecting assembly (11) includes a connecting pipe (111) and a connecting flange (112). The connecting pipe (111) is fixedly connected to the connecting flange (112). The end of the connecting pipe (111) away from the connection to the connecting flange (112) is fixedly connected to the air outlet electric butterfly valve (4). The connecting flange (112) is fixedly connected to the vent of the grain silo.

10. An automated grain silo sealing detection device according to claim 9, characterized in that: The connecting assembly (11) includes a magnetic lock (113) and a sealing silicone gasket (114). The magnetic lock (113) is disposed on the connecting flange (112), and the sealing silicone gasket (114) is disposed at one end of the connecting flange (112) facing the vent of the grain silo. The magnetic lock (113) is electrically connected to the electrical control box (5).

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