Tank type vehicle monitor

Abstract

The invention discloses a tank vehicle monitor, comprising a liquid level probe, an automatic valve closing controller, a vehicle-mounted socket, an in-place monitoring device and an alarm, wherein the liquid level probe, the automatic valve closing controller, the vehicle-mounted socket and the in-place monitoring device are all connected to the controller via a cable; the liquid level probe comprises a high liquid level probe installed on the top of the tank vehicle and a low liquid level probe installed at the bottom of the tank vehicle, the automatic valve closing controller is installed in an operation box of the tank vehicle, the in-place detection device is installed on the emergency shut-off valve in the vehicle body, and is connected to a gas-controlled combination switch in the operation box of the tank vehicle, real-time monitoring of the closing and opening of the emergency shut-off valve, and voice broadcasting through the alarm; the tank vehicle monitor has a compartment display function, and if a high or low liquid level probe in any compartment fails, it can be indicated by light and voice broadcasting, which is convenient for maintenance and detection; and the emergency shut-off valve in-place monitoring function has a low risk factor and is safe and reliable.

Description

Technical Field

[0001] The present invention belongs to the field of petrochemical technology, and specifically relates to a tank vehicle monitor that can monitor the tank vehicle liquid level, liquid level probe status, and emergency shut-off valve status in real time during the loading, unloading, and transportation of oil and chemical products, and display the status through lights and voice. Background Art

[0002] To meet safety and environmental requirements, nearly all bottom-loading tankers in my country are now equipped with overflow probes and emergency shut-off valves. Drivers are also required to close the emergency shut-off valves after loading and unloading. Currently, overflow probes on tankers can fail, creating a dangerous situation where drivers cannot load oil or overflow from the tanker due to probe failure. For multi-bin tankers, the numerous probes make it necessary to check the status of each individual probe in each bin when a probe fails, a complex and dangerous operation. The inability to immediately and accurately determine the location of the faulty probe compromises work efficiency and increases workload.

[0003] After loading and unloading a tank truck, the emergency shut-off valve must be manually closed. This can lead to human negligence resulting in the valve not being closed in time, posing a significant safety hazard during tank truck operation. Furthermore, there is no robust emergency shut-off valve detection system or alarm system to indicate whether the valve is in place. If a tank truck is overloaded, even if the alarm level is not reached, prolonged exposure to high temperatures can cause the liquid inside the tank to expand and exceed the high-level probe. Without real-time monitoring equipment, this problem cannot be detected in time, leading to overflow and potentially a dangerous accident.

[0004] Existing tank trucks are generally not equipped with low-level probes. During unloading, it is impossible to determine whether the medium in the tank has been unloaded. If there is still medium left after unloading, it is very easy to cause an oil spill accident because it is impossible to determine whether there is any medium left in the tank truck during reloading. Existing high-level probes are basically connected using a five-wire system. For multi-bin tank trucks, installation is cumbersome, and the wiring harnesses are too many and easy to get confused. Existing low-level probes also have the problem of cumbersome installation, too many wiring harnesses, and easy to get confused. The sealing method of the low-level probe is also a major problem. Due to long-term exposure to oil, it is very easy for oil to invade the probe, resulting in damage to the probe function.

[0005] Existing outlets with tank level indicators can only display high liquid levels, resulting in significant limitations. They are not highly secure and do not meet explosion-proof requirements. They have limited internal space and complex wiring. While they can display the tank level probe status, they cannot monitor it in real time. Existing emergency shut-off valves are generally incapable of self-closing and self-monitoring functions on their own and require auxiliary equipment to close and monitor the valve status. Existing devices that can automatically close and monitor the emergency shut-off valve status typically detect the tanker's starting speed and then interlock the valve to close. Several methods exist: 1. GPS speed measurement. GPS is not only expensive, but also requires satellite detection and signal detection to work and measure the tanker's speed. It cannot instantly close the emergency shut-off valve, posing a safety hazard when the tanker is on the road. 2. Gyroscopes simulate vehicle speed, which is cumbersome and prone to interference. Gyroscopes simulate vehicle speed by measuring acceleration, which can be unstable when the vehicle vibrates, disrupting normal loading and unloading operations. 3. Radar speed measurement is expensive, inaccurate, and unreliable.

[0006] The existing emergency shut-off valve is in place to monitor the speed signal connected to the tank truck body. The installation and wiring are very complicated. The time-consuming installation of a device is greatly increased, and it must be carried out by a body specialist. Moreover, after disassembly and assembly, the vehicle is no longer covered by the warranty policy. The existing safety equipment in the field of hazardous materials loading and unloading and transportation has the following deficiencies: it is impossible to monitor the high and low liquid levels in real time; the wiring of the high and low liquid level probes is complicated and difficult to operate; there is basically no real-time sub-compartment detection of the liquid levels in multiple compartments; it is impossible to confirm whether the emergency shut-off valve is closed in place; each part is an independent device and there is no systematic processing method. Summary of the Invention

[0007] In order to overcome the defects of the existing technology, a device is provided which can monitor the liquid level of the tank truck and the status of the emergency shut-off valve in real time and display the status through lights and voice by utilizing monitoring and display equipment and combining the actual needs of real-time monitoring and safety detection.

[0008] The present invention provides a tank vehicle monitor, comprising a liquid level probe, an automatic valve closing controller, an on-board socket, an in-place monitoring device and an alarm, wherein the liquid level probe, the automatic valve closing controller, the on-board socket and the in-place monitoring device are all connected to the controller via a cable; the liquid level probe comprises a high liquid level probe installed on the top of the tank vehicle and a low liquid level probe installed at the bottom of the tank vehicle; the automatic valve closing controller is installed in the tank vehicle operating box, and is connected to a controller installed outside the tank vehicle operating box by an external cable, and is connected to a gas-controlled combination switch installed in the tank vehicle operating box by an air pipe; the alarm is installed inside the cab, and a wireless signal receiving device is provided inside the alarm, and the alarm is connected to the controller via the wireless signal receiving device; the in-place detection device is installed on the emergency shut-off valve in the vehicle body, and is connected to the gas-controlled combination switch in the tank vehicle operating box, so as to monitor the closing and opening of the emergency shut-off valve in real time and give voice announcements through the alarm.

[0009] Furthermore, the liquid level probe is connected to a controller outside the tank truck operating box through a two-wire and five-wire wiring method.

[0010] Furthermore, the liquid level probe is an anti-overflow probe, comprising a prism, a signal light, a protective tube, a circuit board and a probe head, wherein the protective tube is threadedly connected to the probe head; the prism is located inside the probe head, the signal light is located on the prism plane and the signal light is welded to the circuit board, the circuit board is connected to a five-color wire, and the circuit board is arranged inside the protective tube, and the five-color wire extends out of the protective tube and is connected to the controller.

[0011] Furthermore, the automatic valve closing controller includes a wiring port, an air inlet, an air outlet and a detection port. The wiring port is connected to the controller through a cable, and the air outlet is connected to the air-controlled switch in the tank truck operating box through an air pipe. By controlling the on and off of the air-controlled switch, the emergency shut-off valve is turned on and off.

[0012] Furthermore, the air outlet includes air outlet I and air outlet II, and the air outlet I is connected to the air inlet of the air-controlled combination switch through an air pipe, and the air outlet II is connected to the air return port of the air-controlled combination switch through an air pipe.

[0013] Furthermore, the in-place monitoring device includes a wire outlet arranged on the outside of the shell, a probe and a ring magnet fixed on the top of the probe, a detection circuit board and an air path interface arranged at the bottom of the outside, the wire outlet is connected to the controller, and the air path interface is connected to the air-controlled combination switch.

[0014] Furthermore, the alarm is installed inside the tank truck cab and includes a wireless signal receiving device, an indicator light, a power interface and a button, and there are five indicator lights.

[0015] Furthermore, the controller is provided with an interface, which includes a high liquid level probe rod interface, a low liquid level probe rod interface, a vehicle socket interface, an automatic valve closing interface, an in-place detection device interface and a power supply interface, and the interface is connected to the corresponding probe rods and devices.

[0016] Compared with the prior art, the advantages and technical effects of the present invention are:

[0017] 1. The present invention has a real-time monitoring function, which can reflect the status of the high and low liquid level probes of each position, as well as the status of the emergency shut-off valve in real time. The low liquid level probe can detect whether there is residual liquid in the tank to prevent incomplete unloading. The high liquid level probe prevents oil spillage during loading, improves the safety performance of loading and unloading and transportation, and facilitates daily maintenance and inspection; the two-wire high liquid level probe and the two-wire low liquid level probe can be connected to the controller in parallel wiring without distinguishing between positive and negative poles, and the probe response time is ≤1s. The operation is simple and convenient, the response is sensitive, and the present invention can connect the special two-wire probe with the common five-wire probe on the market, and can connect up to 8 high liquid level probes and 8 low liquid level probes at the same time, which can meet the needs of most tank trucks and has a wide range of adaptability.

[0018] 2. The supporting equipment of the present invention, the automatic valve closing controller complies with the provisions of GB7258-2017 standards. When the vehicle starts, if the emergency shut-off valve is not closed, it can realize the function of automatically closing the emergency shut-off valve, and has the function of controller light indication and cab voice broadcast. Through wireless transmission technology, the controller located in the operation box is connected to the alarm device located in the cab without cable connection, which is convenient for the situation where the front of the vehicle needs to be separated from the body during vehicle maintenance.

[0019] 3. The present invention has a compartment display function. If the high and low liquid level probes in any compartment fail, the light indication and voice broadcast can be used to determine which probe in which compartment has failed, which is convenient for maintenance and detection. In addition, it adopts an explosion-proof design and is installed outside the operation box, with a low risk factor and is safe and reliable.

[0020] 4. The present invention has the function of monitoring the position of the emergency shut-off valve. If the emergency shut-off valve is not closed or is not closed tightly, the controller will give light and voice alarm prompts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the tank vehicle equipped with a monitor according to the present invention.

[0022] Figure 2 Schematic diagram of the structure of the liquid level probe of the present invention.

[0023] Figure 3 This is a schematic diagram of the internal structure of the automatic valve closing controller of the present invention.

[0024] Figure 4 This is a schematic diagram of the front structure of the vehicle socket of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the in-place monitoring device of the present invention.

[0026] Figure 6 This is a schematic diagram of the front structure of the alarm of the present invention.

[0027] Figure 7 Schematic diagram of the overall structure of the controller of the present invention.

[0028] In the figure: 100, liquid level probe; 101, prism; 102, signal light; 103, protective tube; 104, circuit board; 105, probe head; 110, high liquid level probe; 120, low liquid level probe;

[0029] 200, automatic valve closing controller; 210, wiring port; 220, air inlet; 230, air outlet; 231, air outlet I; 232, air outlet II; 240, detection port;

[0030] 300, vehicle socket; 301, connection port;

[0031] 400, emergency shut-off valve; 410, in-place detection device; 411, wire outlet; 412, probe; 413, ring magnet; 414, detection circuit board; 415, gas line interface; 416, housing;

[0032] 500, alarm; 510, power interface; 520, indicator light; 530, wireless signal receiving device; 540, button;

[0033] 600, controller; 610, high liquid level probe rod interface; 620, low liquid level probe rod interface; 630, vehicle socket interface; 640, automatic valve closing interface; 650, in-place monitoring device interface; 660, power supply interface. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] A tank vehicle monitor, such as Figure 1The figure includes a liquid level probe 100, an automatic valve closing controller 200, an on-board socket 300, an in-place monitoring device 410 and an alarm 500. The liquid level probe 100, the automatic valve closing controller 200, the on-board socket 300, and the in-place monitoring device 410 are all connected to the controller 600 through cables; the liquid level probe 100 includes a high liquid level probe 110 installed on the top of the tank truck of the bottom-loading tank truck and a low liquid level probe 120 installed at the bottom position of the tank truck of the bottom-loading tank truck. The automatic valve closing controller 200 is installed in the tank truck operation box and realizes signal communication with the controller 600 installed outside the tank truck operation box through an external cable, and realizes communication with the air-controlled combination switch installed in the tank truck operation box through an air pipe. The alarm 500 is installed inside the cab, and a wireless signal receiving device 530 is provided inside the alarm 500.

[0037] This detector is a real-time monitoring device for hazardous chemicals during loading, unloading, and transportation. By connecting the high-level probe 110 and the low-level probe 120 to an external device (monitoring equipment), it can monitor the status of the high and low level probes 120 in the tanker in real time, in separate compartments. It can also connect to the emergency shut-off valve 400 via the external device (monitoring equipment) to monitor its status in real time. Once loading and unloading is complete, the automatic valve closing controller 200 can automatically close the emergency shut-off valve 400. Furthermore, the device status detected by the controller 600 can be connected to the cab alarm system via wireless transmission equipment, providing real-time voice notification of the specific situation.

[0038] High and low level probes 120 are installed at the top and bottom of the tanker, respectively, and connected to the controller 600 via two-wire or five-wire wiring. These probes monitor the tanker's liquid level and probe status in real time, displaying the status through lights on the controller 600. Specifically, the high level probe 110 is installed at the top of a bottom-loading tanker. It detects whether the liquid level has reached the high-alert level, preventing overfilling and spillage, and issues a status signal. The low level probe 120 is installed at the bottom of a bottom-loading tanker. It detects whether the liquid level has reached the minimum alert level, confirming whether unloading is complete and any residual liquid remaining in the tanker. It also issues a status signal. Before loading the tanker, observe the controller 600 display panel. If the loading position corresponds to the low-level probe 120, a green light indicates that there is no residual liquid in this position. If a yellow light is displayed, it indicates that there is residual liquid in this position. Pay attention to the setting of the loading quantity. At the same time, the color of the light can intuitively understand the liquid level status in the vehicle during unloading. During the loading process, observe the controller 600 display panel. If the loading position corresponds to the high-level probe 110, a green light indicates that the medium in this position has not yet reached the warning state. If a red light is displayed, it means that the medium in this position has reached the warning state. It is necessary to immediately stop the pump and close the valve, and stop the loading operation to prevent the loading medium from overflowing. At the same time, if a probe emits an alarm signal under normal conditions, the corresponding probe can be found and repaired according to the alarm position displayed on the panel.

[0039] Specifically: Figure 2 The liquid level probe 100 shown is an overflow prevention probe and includes a prism 101, a signal light 102, a protective tube 103, a circuit board 104, and a probe head 105. The prism 101 is located inside the probe head 105, with a conical front end. The signal light 102 is located on the plane of the prism 101 and is welded to the circuit board 104. The protective tube 103 is a hollow cylindrical structure with threads on one end that threadably connect to the probe head 105. The circuit board 104 is located inside the protective tube 103 and is connected to a five-color wire. The five-color wire extends from the protective tube 103 and connects to the controller 600. The circuit board 104 drives the signal light 102 to emit a signal, which is reflected by the prism 101 and returned to the other signal light 102. When the prism 101 is in the air, the signal reception is normal. When the prism 101 is in a liquid medium, the signal passing through the prism 101 is refracted. When the signal returns to the receiving signal light 102, the signal becomes weaker and an alarm signal is issued. The change in the volume of the recovered signal determines the position of the liquid level in the tanker and whether it has reached the warning position.

[0040] Automatic valve closing controller 200( Figure 3), installed in the operating box, and connected to the controller 600 by signal through an external cable. Its function is to realize the function of automatically closing the emergency shut-off valve 400 by controlling the pneumatic control combination switch of the tank truck operating box, and output a status signal at the same time. The automatic valve closing controller 200 is connected to the pneumatic control switch in the tank truck operating box, and realizes the opening and closing of the emergency shut-off valve 400 by controlling the on and off of the pneumatic control switch. When loading and unloading begins, the alarm 500 in the cab needs to be turned to the manual state. At this time, the emergency shut-off valve 400 needs to be opened and closed manually. When loading and unloading is completed, if the driver does not close the emergency shut-off valve 400, the alarm 500 in the cab will sound a voice alarm. At this time, the driver can get off the vehicle and manually close the emergency shut-off valve 400, or directly turn the switch of the alarm 500 to the automatic state. At this time, the automatic valve closing controller 200 device will automatically close the emergency shut-off valve 400.

[0041] Specifically, the automatic valve closing controller 200 includes a wiring port 301, an air inlet 220, an air outlet 230, and a detection port 240. The wiring port 301 is connected to the controller 600 via a cable to provide power, signal transmission, and control. The tank truck's air source is connected to the air inlet 220 of the automatic valve closing controller 200 via an air pipe. The air outlet 230 includes air outlet I 231 and air outlet II 232. Air outlet I 231 is connected to the air inlet of the air-controlled combination switch via an air pipe, while air outlet II 232 is connected to the air return port of the air-controlled combination switch via an air pipe. The detection port 240 is connected to the detection port 240 of the air-controlled combination switch via an air pipe. When loading and unloading oil, the air-controlled combination switch is turned on, the emergency shut-off valve 400 is opened, the detection port 240 detects an air pressure signal, and outputs the signal to the controller 600 through the cable. At this time, the controller 600 displays that the emergency shut-off valve 400 is not closed and issues an alarm signal. When the loading and unloading of oil is completed, when the driver starts the vehicle, the controller 600 detects that the emergency shut-off valve 400 is not closed, and issues a prompt sound for manually closing the emergency shut-off valve 400. At this time, the driver can close the emergency shut-off valve 400 by manually closing the air-controlled combination switch, or directly turn the cab alarm box button 540 to automatic mode. At this time, the controller 600 directly controls the automatic valve closing controller 200, switches the air circuit, and automatically closes the air-controlled combination switch to achieve the function of automatically closing the emergency shut-off valve 400.

[0042] Car socket 300( Figure 4) is connected to the controller 600 via a cable. Its function is to integrate the signals from the tank truck's numerous high and low level probes 120 through the controller 600 and output them to the vehicle socket 300. This facilitates the implementation of the plug cable assembly of the oil depot safety equipment obtaining probe status signals during tank truck filling. The controller 600 then integrates the high and low level probe 120 signals into a single status signal and outputs it to the vehicle socket 300. When loading and unloading vehicles, the oil depot safety device is connected to the vehicle socket 300 through a plug cable assembly to connect the probe rod to the oil depot safety device. If the loading medium does not pass the top loading probe rod, an alarm signal will be output. Through the vehicle socket 300 and the plug cable assembly connected thereto, the oil depot safety device will stop the pump and close the valve to ensure the safety of loading and unloading vehicles. The plug cable assembly of the oil depot safety device is a component that receives electrical signals and is directly connected to the controller 600. The controller 600 integrates the signals into one signal and transfers it to the vehicle socket 300. Then, the signal is transmitted to the on-site installed controller 600 through the plug cable assembly connected to the vehicle socket 300.

[0043] In-place monitoring device 410 ( Figure 5 ), the entire tank car is equipped with 1-8 compartments ( Figure 1 Each tank compartment is equipped with an emergency shut-off valve 400 at the bottom, and each emergency shut-off valve 400 is equipped with a separate in-place monitoring device 410. The in-place monitoring device 410, located at the bottom of the tanker, can transmit the real-time status of the emergency shut-off valve 400 to the controller 600 via a cable. The controller 600 reflects the real-time status through the color of the light. All signals are connected to the controller 600 to achieve in-place detection of the emergency shut-off valve 400 by compartment. The closed and open status of the emergency shut-off valve 400 can be reflected in real time and can be voice-announced through the cab alarm 500. The in-place monitoring device 410 is independently installed and matched with the emergency shut-off valve 400 to detect the open and close status of the emergency shut-off valve 400 at each compartment and output a status signal to the controller 600.

[0044] Specifically, the in-place monitoring device comprises an outer air inlet 220 and an air outlet 230, a wire outlet 411, a probe 412, an annular magnet 413, a detection circuit board 414, an air path interface 415, and a housing 416. The wire outlet 411 is connected to the controller 600 to transmit signals. The probe 412 is threadedly connected to the housing 416, which is also threadedly connected to the emergency shut-off valve 400. The detection circuit board 414 is placed inside the probe 412, and the annular magnet 413 is fixed to the top of the probe 412. When the air path interface 415 is turned on and off, the annular magnet 413 moves back and forth. When the annular magnet 413 approaches the detection circuit board 414, the circuit board 104 detects the magnet signal and considers that the emergency shut-off valve 400 is closed. If the annular magnet 413 does not reach the position near the detection circuit board 414 and no magnet signal is detected, it is considered that the emergency shut-off valve 400 is not closed. The controller 600 and the position monitoring device transmit signals in real time through the cable for real-time monitoring.

[0045] Alarm 500( Figure 6 ) is installed inside the cab. It draws power from the cab, has an upload signal interface, and houses a wireless signal receiving device 530. The alarm 500 has five status indicator lights 520 and a voice broadcast function, which is implemented through the coordination of hardware and software. The specific process is as follows: powered by an external power supply, wireless reception matches the wireless transmission of the controller 600 to achieve wireless signal transmission. The five status indicator lights 520 indicate high liquid level, low liquid level, automatic valve closing controller 200, communication status, and emergency shut-off valve 400 detection status.

[0046] Controller 600( Figure 7 ) is installed outside the tanker's operating box and draws power from the tanker. The controller is equipped with interfaces, including a high-level probe interface 610, a low-level probe interface 620, an onboard socket interface 630, an automatic valve shutoff interface 640, an in-place detection device interface 650, and a power supply interface 660. These interfaces sequentially connect to the high-level probe 110, the low-level probe 120, the onboard socket 300, the automatic valve shutoff controller 200, and the in-place detection device. The controller 600 internally includes a light status display and wireless communication equipment. Its function is to process various incoming signals and display the status of the high and low level probes 120 and the emergency shutoff valve 400 at each tank location through lighting. It also integrates and outputs all probe status signals, facilitating connection to existing oil depot loading and unloading equipment. Status signals for external devices are also transmitted via wireless communication equipment.

[0047] Working Principle: 1. The tank truck's high-level probe 110 and low-level probe 120 are connected to the controller 600 outside the tank truck's operating box via two-wire and five-wire wiring. The controller 600's display panel displays the real-time status of the high- and low-level probes 120 by switching between different lighting conditions. 2. The controller 600 integrates the probe signals and transmits them to the onboard socket 300 located in the operating box, allowing the plug cable assembly of the oil depot safety equipment to obtain the probe status signals during loading and unloading. 3. The automatic valve closing controller 200 is connected to the controller 600, which supplies power to the automatic valve closing controller 200. The automatic valve closing controller 200 can manually or automatically close the emergency shut-off valve 400 when the vehicle is started, even if the emergency shut-off valve 400 is not closed. 4. The emergency shut-off valve 400's in-place detection device 410 directly detects the emergency shut-off valve 400's open or closed state through an action relationship, and transmits a signal to the controller 600 to determine whether the emergency shut-off valve is fully closed. 5. The controller 600 processes and analyzes all signals and transmits the signal status to the alarm 500 located in the cab via wireless communication. 6. The alarm 500, receiving signals from the controller 600, displays the status of the tanker's high-level probe 110, low-level probe 120, automatic valve closing controller 200, and emergency shut-off valve 400, accompanied by a voice prompt.

[0048] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] The above description is merely an embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the above-disclosed method content without departing from the scope of the technical solution of the present invention, which all fall within the scope of protection of the claims.

Claims

1. A tank vehicle monitor, comprising a liquid level probe, an automatic valve closing controller, a vehicle socket, a position detection device and an alarm, characterized in that: The liquid level probe, automatic valve closing controller, vehicle-mounted socket, and in-place detection device are all connected to the controller through cables; the liquid level probe includes a high liquid level probe installed on the top of the tank truck and a low liquid level probe installed at the bottom of the tank truck; the automatic valve closing controller is installed in the tank truck operating box, and is connected to the controller installed on the outside of the tank truck operating box through an external cable, and is connected to the gas-controlled combination switch installed in the tank truck operating box through an air pipe; the alarm is installed inside the cab, and a wireless signal receiving device is provided inside the alarm, and the alarm is connected to the controller through the wireless signal receiving device; the in-place detection device is installed on the emergency shut-off valve in the vehicle body, and is connected to the gas-controlled combination switch in the tank truck operating box, so as to monitor the closing and opening of the emergency shut-off valve in real time, and make voice broadcasts through the alarm; The controller is provided with an interface, which includes a high liquid level probe rod interface, a low liquid level probe rod interface, a vehicle socket interface, an automatic valve closing interface, an in-place detection device interface and a power supply interface, and the interface is connected to the corresponding probe rods and devices. The high liquid level probe rod is installed at the top position of the tank truck of the bottom loading tank truck; the low liquid level probe rod is installed at the bottom position of the tank truck of the bottom loading tank truck; The tank truck is equipped with storage spaces, and an emergency shut-off valve is installed at the bottom of each storage space. Each emergency shut-off valve is equipped with a separate in-place detection device, which is located at the bottom of the tank truck and can transmit the real-time status of the emergency shut-off valve to the controller through a cable. The in-place detection device includes a wire outlet arranged on the outside of the shell, a probe and an annular magnet fixed on the top of the probe, a detection circuit board and an air path interface arranged at the bottom of the outside, the wire outlet is connected to the controller, and the air path interface is connected to the air-controlled combination switch.

2. A tank vehicle monitor according to claim 1, characterized in that: The liquid level probe is connected to a controller outside the tank truck operating box through a two-wire and five-wire wiring method.

3. A tank vehicle monitor according to claim 1, characterized in that: The liquid level probe is an anti-overflow probe, comprising a prism, a signal light, a protective tube, a circuit board and a probe head, wherein the protective tube is threadedly connected to the probe head; the prism is located inside the probe head, the signal light is located on the prism plane and the signal light is welded to the circuit board, the circuit board is connected to a five-color wire, and the circuit board is arranged inside the protective tube, and the five-color wire extends out of the protective tube and is connected to a controller.

4. A tank vehicle monitor according to claim 1, characterized in that: The automatic valve closing controller includes a wiring port, an air inlet, an air outlet and a detection port. The wiring port is connected to the controller through a cable, and the air outlet is connected to the air-controlled switch in the tank truck operating box through an air pipe. The opening and closing of the emergency shut-off valve is realized by controlling the on and off of the air-controlled switch.

5. A tank vehicle monitor according to claim 4, characterized in that: The air outlet includes an air outlet I and an air outlet II, and the air outlet I is connected to the air inlet of the air-controlled combination switch through an air pipe, and the air outlet II is connected to the air return port of the air-controlled combination switch through an air pipe.

6. A tank vehicle monitor according to claim 1, characterized in that: The alarm is installed inside the tank truck cab and includes a wireless signal receiving device, an indicator light, a power interface and a button, and there are five indicator lights.

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