Emergency cut-off control system and method for tank car

Abstract

According to the emergency cut-off control system and method of the tank car, the system achieves automatic closing of the emergency cut-off valve with the vehicle in the brake release state as the basis for closing the emergency cut-off valve, and the system is advanced in response time and more reliable. Meanwhile, the monitoring system can monitor the opening and closing state of the emergency cut-off valve and send a first monitoring signal to the control system when it is monitored that the emergency cut-off valve is in the opening state, so that the control system can control the auxiliary braking system to enable the vehicle to be in the parking braking state when the emergency cut-off valve is not normally and automatically closed; and the vehicle cannot be started when the emergency cut-off valve is not closed, so that zero potential safety hazard is realized. Meanwhile, when the emergency cut-off valve is not normally and automatically closed, the control system can control the alarm system to send out a sound-light alarm signal so as to remind personnel to manually close the emergency cut-off valve, the vehicle cannot be started to run if the emergency cut-off valve is not closed, and the running safety of the vehicle can be ensured.

Description

Technical Field

[0001] The present application relates to the field of tank truck pneumatic technology, and in particular to an emergency cut-off control system and method for a tank truck. Background Art

[0002] The valve box of tank trucks transporting hazardous chemicals such as LNG (Liquefied Natural Gas), liquid oxygen, and liquid hydrogen is equipped with an emergency shut-off valve. The emergency shut-off valve is generally installed at the liquid inlet, liquid outlet, gas phase port, etc. to control opening and closing. When not loading or unloading, the emergency shut-off valve should be in a closed state. When opening the emergency shut-off valve for liquid inlet and outlet operations, the tank truck must maintain a stable parking brake state, and there should be no dangerous situations such as slipping or driving away. The emergency shut-off valve must be closed and the parking brake state released during vehicle driving.

[0003] In the related art, when it is detected that the emergency shut-off valve needs to be closed, an audible and visual signal method, i.e., a warning light or voice reminder to the driver to close the emergency shut-off valve can be used. Although it meets regulatory requirements, it is mainly a subjective visual or auditory reminder scheme. There is a possibility of human negligence in bright light, noisy environment, etc. Once the personnel forget to manually close the emergency shut-off valve by negligence, there will be certain safety hazards. In addition, an automatic emergency shut-off function system solution can also be adopted, that is, by adding speed sensors, solenoid valves, lithium batteries, etc., to automatically close the emergency shut-off valve when the vehicle is moving. This solution detects the vehicle speed through a speed sensor as the basis for automatically closing the emergency shut-off valve, and there is a certain lag in the judgment time. And using lithium batteries as the power source for the emergency shut-off control system has certain safety risks. Summary of the invention

[0004] The main purpose of the embodiment of the present application is to propose an emergency shut-off control system and method for a tank truck, which aims to realize automatic closing of the emergency shut-off valve by taking the vehicle's brake release state as the basis for closing the emergency shut-off valve, and the system response time is advanced and more reliable; at the same time, when the system detects that the emergency shut-off valve is not closed automatically, the auxiliary braking system is used to control the vehicle to be in a braking state and unable to start, thereby ensuring that the vehicle cannot start when the emergency shut-off valve is not closed, thereby achieving zero safety hazards.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application proposes an emergency shut-off control system for a tank truck, comprising a sensing system, a control system, an execution system, a monitoring system, an alarm system and an auxiliary braking system; the sensing system, the execution system, the monitoring system, the alarm system and the auxiliary braking system are all connected to the control system, the monitoring system is connected to the execution system, and the execution system comprises an emergency shut-off valve;

[0006] The sensing system is used to sense a first pressure of a vehicle service brake pipeline and a second pressure of a vehicle parking brake pipeline, and transmit the first pressure and the second pressure to the control system;

[0007] The control system is used to determine whether the vehicle is in a brake release state according to the first pressure and the second pressure, and send a closing instruction to the execution system when it is determined that the vehicle is in a brake release state;

[0008] The execution system is used to control the closing of the emergency shut-off valve based on the closing instruction;

[0009] The monitoring system is used to monitor the opening and closing state of the emergency shut-off valve and send a first monitoring signal to the control system when it is detected that the emergency shut-off valve is in an open state;

[0010] The control system is further used to send a first control signal to the auxiliary brake system and a second control signal to the alarm system according to the first monitoring signal;

[0011] The auxiliary brake system is used to control the vehicle to be in a parking brake state based on the first control signal;

[0012] The alarm system is used to send out an audible and visual alarm signal based on the second control signal to remind personnel to manually close the emergency shut-off valve.

[0013] In one embodiment of the present application, the monitoring system is also used to send a second monitoring signal to the control system when it is detected that the emergency shut-off valve is in a closed state. Correspondingly, the control system is also used to send a third control signal to the auxiliary braking system based on the second monitoring signal, so that the auxiliary braking system controls the vehicle to release the parking brake state based on the third control signal.

[0014] In one embodiment of the present application, the sensing system includes a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are both connected to the control system;

[0015] The first pressure sensor is arranged on the service brake pipeline, and the first pressure sensor is used to sense the first pressure in the service brake pipeline and transmit it to the control system; the service brake pipeline is used to communicate with the service brake air chamber to transport air to the service brake air chamber;

[0016] The second pressure sensor is arranged on the parking brake pipeline, and is used for sensing the second pressure in the parking brake pipeline and transmitting the second pressure to the control system; the parking brake pipeline is used for communicating with the parking brake air chamber to transport air to the parking brake air chamber.

[0017] In one embodiment of the present application, the execution system further includes an air supply device, a filter pressure reducing valve, a three-way solenoid valve and at least one manual control valve, the three-way solenoid valve includes an air inlet end, an air outlet end and an air release end, the air outlet end of the air supply device is communicated with the air inlet end of the filter pressure reducing valve, the air outlet end of the filter pressure reducing valve is communicated with the air inlet end of the three-way solenoid valve, the air outlet end of the three-way solenoid valve is communicated with the air inlet end of the manual control valve, and the air outlet end of the manual control valve is communicated with the port of the emergency shut-off valve; the three-way solenoid valve is electrically connected to the control system;

[0018] Correspondingly, the execution system is used to control the closing of the emergency shut-off valve based on the closing instruction, including:

[0019] The three-way solenoid valve closes the air inlet end of the three-way solenoid valve based on the closing instruction, and opens the air discharge end of the three-way solenoid valve to close the emergency shut-off valve.

[0020] In one embodiment of the present application, the manual control valve includes a first manual three-way valve, a second manual three-way valve and a pneumatic combination valve, and the first manual three-way valve, the second manual three-way valve and the pneumatic combination valve are respectively arranged at set positions corresponding to the vehicle, the air outlet end of the three-way solenoid valve is connected to the air inlet end of the first manual three-way valve, the air outlet end of the first manual three-way valve is connected to the air inlet end of the second manual three-way valve, the air outlet end of the second manual three-way valve is connected to the air inlet end of the pneumatic combination valve, and the air outlet end of the pneumatic combination valve is connected to the emergency shut-off valve.

[0021] In one embodiment of the present application, the emergency shut-off valve includes a first emergency shut-off valve, a second emergency shut-off valve and a third emergency shut-off valve, wherein the first emergency shut-off valve is arranged on a liquid phase pipeline, the second emergency shut-off valve is arranged on a gas phase pipeline, and the third emergency shut-off valve is arranged on a boosting pipeline;

[0022] Correspondingly, the pneumatic combination valve includes a pneumatic main valve, a first pneumatic sub-valve, a second pneumatic sub-valve and a third pneumatic sub-valve, the air outlet end of the second manual three-way valve is connected to the air inlet end of the pneumatic main valve, the air outlet end of the pneumatic main valve is connected to the air inlet end of the first pneumatic sub-valve, the air inlet end of the second pneumatic sub-valve and the air inlet end of the third pneumatic sub-valve, the air outlet end of the first pneumatic sub-valve is connected to the port of the first emergency shut-off valve, the air outlet end of the second pneumatic sub-valve is connected to the port of the second emergency shut-off valve, and the air outlet end of the third pneumatic sub-valve is connected to the port of the third emergency shut-off valve;

[0023] The pneumatic main valve is used to simultaneously control the opening and closing of the first pneumatic sub-valve, the second pneumatic sub-valve and the third pneumatic sub-valve;

[0024] The first pneumatic sub-valve is used to control the opening and closing of the first emergency shut-off valve, the second pneumatic sub-valve is used to control the opening and closing of the second emergency shut-off valve, and the third pneumatic sub-valve is used to control the opening and closing of the third emergency shut-off valve.

[0025] In one embodiment of the present application, the monitoring system includes a first position sensor, a second position sensor, and a third position sensor;

[0026] The first position sensor is connected to the first emergency shut-off valve, and the first position sensor is used to monitor the opening and closing state of the first emergency shut-off valve;

[0027] The second position sensor is connected to the second emergency shut-off valve, and the second position sensor is used to monitor the opening and closing state of the second emergency shut-off valve;

[0028] The third position sensor is connected to the third emergency shut-off valve, and the third position sensor is used to monitor the opening and closing state of the third emergency shut-off valve;

[0029] Correspondingly, the monitoring system is used to monitor the opening and closing state of the emergency shut-off valve and send a first monitoring signal to the control system when the emergency shut-off valve is detected to be in an open state, including:

[0030] Monitor the opening and closing states of the first emergency shut-off valve, the second emergency shut-off valve and the third emergency shut-off valve, and send a first monitoring signal to the control system when it is monitored that at least one of the first emergency shut-off valve, the second emergency shut-off valve and the third emergency shut-off valve is in an open state.

[0031] In one embodiment of the present application, the control system is used to determine whether the vehicle is in a brake release state according to the first pressure and the second pressure, including:

[0032] Determining whether the first pressure is less than or equal to a first pressure threshold, and determining whether the second pressure is greater than a second pressure threshold;

[0033] If the first pressure is less than or equal to the first pressure threshold, and the second pressure is greater than the second pressure threshold, it is determined that the vehicle is in a brake release state.

[0034] To achieve the above-mentioned purpose, a second aspect of an embodiment of the present application provides an emergency cut-off control method for a tank truck, the method comprising:

[0035] Acquiring a first pressure of a vehicle service brake pipeline and a second pressure of a vehicle parking brake pipeline;

[0036] determining whether the vehicle is in a brake release state according to the first pressure and the second pressure;

[0037] If the vehicle is in a brake release state, the emergency shut-off valve of the vehicle is controlled to be closed;

[0038] The opening and closing state of the emergency shut-off valve is monitored and when the emergency shut-off valve is detected to be in an open state, the vehicle is controlled to be in a parking brake state, and an audible and visual alarm signal is controlled to be issued to remind personnel to manually close the emergency shut-off valve.

[0039] In one embodiment of the present application, after controlling the vehicle to be in a parking brake state and controlling the emission of an audible and visual alarm signal, the method further includes:

[0040] The open and closed state of the emergency shut-off valve is monitored and when it is detected that the emergency shut-off valve is in a closed state, the vehicle is controlled to release the parking brake state.

[0041] In the technical solution provided in the embodiment of the present application, the emergency cut-off control system of the tank truck includes a sensing system, a control system, an execution system, a monitoring system, an alarm system and an auxiliary braking system. Among them, the sensing system is used to sense the first pressure of the vehicle's service brake pipeline and the second pressure of the vehicle's parking brake pipeline, and transmit the first pressure and the second pressure to the control system, so that the control system can judge whether the vehicle is in a brake release state according to the first pressure and the second pressure, and control the execution system to close the emergency cut-off valve when it is judged that the vehicle is in a brake release state. That is, the emergency cut-off valve is automatically closed based on the vehicle's brake release state, and the system reaction time is advanced and more reliable. At the same time, the monitoring system can monitor the opening and closing state of the emergency cut-off valve and send a first monitoring signal to the control system when the emergency cut-off valve is detected to be in an open state, so that the control system can control the auxiliary braking system to put the vehicle in a parking brake state when the emergency cut-off valve is not closed normally and automatically, and can ensure that the vehicle cannot start when the emergency cut-off valve is not closed, achieving zero safety hazards. At the same time, when the emergency shut-off valve does not close automatically normally, the control system can also control the alarm system to send out an audible and visual alarm signal to remind personnel to manually close the emergency shut-off valve. If it is not closed, the vehicle cannot start and drive, thus ensuring the safety of the vehicle.

[0042] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of an emergency cut-off control system of a tank truck provided in one embodiment of the present application.

[0044] Figure 2Schematic diagram of the structure of a sensing system provided in one embodiment of the present application.

[0045] Figure 3 It is a first structural diagram of an execution system provided in one embodiment of the present application.

[0046] Figure 4 It is a second structural diagram of the execution system provided in one embodiment of the present application.

[0047] Figure 5 It is a flow chart of the emergency shutoff control method of the tank truck provided in an embodiment of the present application.

[0048] Figure 6 It is a flowchart of the steps of determining whether the vehicle is in a brake release state based on the first pressure and the second pressure provided in an embodiment of the present application.

[0049] Reference numerals:

[0050] 110, sensing system, 120, control system, 130, execution system, 140, monitoring system, 150, alarm system, 160, auxiliary braking system;

[0051] 111, first pressure sensor, 112, second pressure sensor, 10, service brake pipeline, 11, service brake air chamber, 20, parking brake pipeline, 21, parking brake air chamber;

[0052] 132. Air supply device, 133. Filter pressure reducing valve, 134. Three-way solenoid valve, 135. Manual control valve, 131. Emergency shut-off valve;

[0053] 1351, first manual three-way valve, 1352, second manual three-way valve, 1353, pneumatic combination valve 1353, 13531, pneumatic main valve, 13532, first pneumatic sub-valve, 13533, second pneumatic sub-valve, 13534, third pneumatic sub-valve, 1311, first emergency shut-off valve, 1312, second emergency shut-off valve, 1313, third emergency shut-off valve 1313. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0057] The valve box of tank trucks transporting hazardous chemicals such as LNG (Liquefied Natural Gas), liquid oxygen, and liquid hydrogen is equipped with an emergency shut-off valve. The emergency shut-off valve is generally installed at the liquid inlet, liquid outlet, gas phase port, etc. to control opening and closing. When not loading or unloading, the emergency shut-off valve should be in a closed state. When opening the emergency shut-off valve for liquid inlet and outlet operations, the tank truck must maintain a stable parking brake state, and there should be no dangerous situations such as slipping or driving away. The emergency shut-off valve must be closed and the parking brake state released during vehicle driving.

[0058] The following problems are prone to occur during the use of the emergency shut-off valve: 1. The operator forgets to pull out the parking brake button and opens the emergency shut-off valve before the vehicle is parked; 2. The operator forgets to close the emergency shut-off valve when the vehicle drives away, causing the leakage of hazardous liquids that damage the environment and threaten personnel safety; 3. The system using electromagnetic valves requires a working power supply, which is not conducive to explosion protection.

[0059] Based on this, an embodiment of the present application proposes an emergency shut-off control system for a tank truck, which uses the vehicle's brake release state as the basis for closing the emergency shut-off valve to achieve automatic closing of the emergency shut-off valve, and the system response time is advanced and more reliable; at the same time, when the system detects that the emergency shut-off valve is not closed automatically, the auxiliary braking system is used to control the vehicle to be in a braking state and unable to start, which can ensure that the vehicle cannot start when the emergency shut-off valve is not closed, achieving zero safety hazards.

[0060] Reference Figure 1 , Figure 11 is a schematic diagram of the structure of an emergency shut-off control system for a tank truck provided in an embodiment of the present application, the system includes a sensing system 110, a control system 120, an execution system 130, a monitoring system 140, an alarm system 150 and an auxiliary braking system 160. Among them, the sensing system 110, the execution system 130, the monitoring system 140, the alarm system 150 and the auxiliary braking system 160 are all connected to the control system 120, the monitoring system 140 is connected to the execution system 130, and the execution system 130 includes an emergency shut-off valve 131. It should be noted that the connection between the various systems can be an electrical connection or a communication connection.

[0061] Among them, the sensing system 110 is connected to the control system 120, and the sensing system 120 is used to sense the first pressure of the vehicle's service brake pipeline and the second pressure of the vehicle's parking brake pipeline, and transmit the first pressure and the second pressure to the control system 120. Therefore, the control system 120 can determine whether the vehicle is in a brake release state according to the first pressure and the second pressure. The control system 120 is connected to the execution system 130, so that the control system 120 can send a closing instruction to the execution system 130 when it is determined that the vehicle is in a brake release state, so that the execution system 130 can control the closing of the emergency cut-off valve 131 based on the closing instruction. Compared with the solution of installing a speed sensor and judging the vehicle speed detected by the speed sensor as the basis for closing the emergency cut-off valve 131, the embodiment of the present application uses the vehicle being in a brake release state as the basis for closing the emergency cut-off valve 131 to realize the automatic closing of the emergency cut-off valve 131, which can effectively prevent the situation where the emergency cut-off valve 131 is not closed due to human negligence in the sound and light signal reminder method. Furthermore, the vehicle releases the brakes before the vehicle speed is generated, so the time for closing the emergency shut-off valve 131 is advanced and the influence of the speed sensing data deviation on the closing action of the emergency shut-off valve 131 is avoided. The system response of the present application is faster and more reliable.

[0062] The monitoring system 140 is connected to the execution system 130, so that the monitoring system 140 can monitor the opening state of the emergency shut-off valve 131 in the execution system 130. The monitoring system 140 is connected to the control system 120, so that the monitoring system 140 can send a first monitoring signal to the control system 120 when it detects that the emergency shut-off valve is in an open state. The control system 120 is connected to the auxiliary braking system 160, so that when the control system 120 receives the first monitoring signal sent by the monitoring system 140, that is, when it detects that the emergency shut-off valve 131 is not closed automatically normally, it can send a first control signal to the auxiliary braking system 160, so that the auxiliary braking system 160 controls the vehicle to be in a parking brake state according to the first control signal, so that the vehicle cannot start to drive. That is, in the embodiment of the present application, when it is monitored that the emergency shut-off valve 131 is not closed automatically normally, the alarm system sends an audible and visual signal to remind the personnel to manually close the emergency shut-off valve 131. If the emergency shut-off valve 131 is not closed manually, the vehicle can still drive normally, which poses certain safety hazards. Based on this, an auxiliary braking system is designed in the embodiment of the present application. When the monitoring system 140 detects that the emergency shut-off valve 131 is not closed automatically, the auxiliary braking system can be used to control the vehicle to be in a parking brake state, thereby ensuring that the vehicle cannot start when the emergency shut-off valve 131 is not closed, thereby achieving zero safety hazards.

[0063] The auxiliary brake system 160 may include a two-position three-way solenoid valve, which is arranged next to the manual parking brake valve of the vehicle and connected in series with the manual parking brake valve. When receiving the first control signal sent by the control system 120, the two-position three-way solenoid valve (normally open) may control the deflation port to perform an evacuation and deflation action to control the vehicle to be in a parking brake state, so that the vehicle cannot start and drive.

[0064] At the same time, the control system 120 is connected to the alarm system 150, so that the monitoring system 140 can send a first monitoring signal to the control system 120 when it is detected that the emergency shut-off valve 131 is in an open state. The control system 120 is connected to the alarm system 150, so that when the control system 120 receives the first monitoring signal sent by the monitoring system 140, that is, when it is detected that the emergency shut-off valve 131 is not closed automatically normally, it can send a second control signal to the alarm system 150, so that the alarm system 150 can send an audible and visual alarm signal based on the second control signal to remind the personnel to manually close the emergency shut-off valve 131. That is, when it is detected that the emergency shut-off valve 131 is not closed automatically normally, the alarm system 150 is controlled to send an audible and visual alarm signal to remind the personnel to manually close the emergency shut-off valve. If it is not closed, the vehicle cannot start and drive, which can ensure the driving safety of the vehicle.

[0065] After the auxiliary brake system 160 controls the vehicle to be in the parking brake state based on the first control signal, and the alarm system sends an audible and visual alarm signal based on the second control signal to remind the personnel to manually close the emergency cut-off valve 131, the monitoring system 130 can also monitor the open state of the emergency cut-off valve 131 in the execution system 130 again, and when it is detected that the emergency cut-off valve 131 is in the closed state, the monitoring system 130 can send a second monitoring signal to the control system 120, so that the control system 120 sends a third control signal to the auxiliary brake system 160 based on the second monitoring signal, so that the auxiliary brake system 160 can control the vehicle to release the parking brake state based on the third control signal. That is, after the vehicle is controlled to be in the parking brake state and the personnel are reminded to manually close the emergency cut-off valve 131, the open state of the emergency cut-off valve 131 can be monitored again by the monitoring system 130. If it is detected that the emergency cut-off valve 131 is in the closed state, that is, the relevant personnel manually close the emergency cut-off valve 131, at this time, the auxiliary brake system 160 can control the vehicle to release the parking brake state, thereby ensuring that the vehicle can start and drive after the emergency cut-off valve 131 is closed.

[0066] Reference Figure 2 , Figure 2 is a schematic diagram of the structure of a sensing system provided in an embodiment of the present application. Figure 2 As shown, the sensing system 110 includes a first pressure sensor 111 and a second pressure sensor 112. The first pressure sensor 111 and the second pressure sensor 112 are both connected to the control system 120, so that the first pressure sensor 111 can transmit the detected pressure value to the control system 120, and the second pressure sensor 112 can transmit the detected pressure value to the control system 120. The first pressure sensor 111 is arranged on the service brake pipeline 10, and the first pressure sensor 111 is used to sense the first pressure in the service brake pipeline 10 and transmit it to the control system 120. The service brake pipeline 10 is used to communicate with the service brake air chamber 11 to deliver air to the service brake air chamber 11. The second pressure sensor 112 is arranged on the parking brake pipeline 20, and the second pressure sensor 112 is used to sense the second pressure in the parking brake pipeline 20 and transmit it to the control system 120; the parking brake pipeline 20 is used to communicate with the parking brake air chamber 21 to deliver air to the parking brake air chamber 21. The service brake air chamber 11 and the parking brake air chamber 21 together form a double-chamber brake air chamber.

[0067] In some embodiments, the control system 120 determines whether the vehicle is in a brake release state according to the first pressure and the second pressure, specifically: determining whether the first pressure is less than or equal to the first pressure threshold, and determining whether the second pressure is greater than the second pressure threshold; if the first pressure is less than or equal to the first pressure threshold, and the second pressure is greater than the second pressure threshold, the vehicle is determined to be in a brake release state. Specifically, when the driver releases the service brake, the service brake air chamber 11 and the service brake pipeline 10 are in a state of no compressed air. When the first pressure detected by the first pressure sensor 111 disposed on the service brake pipeline 10 is less than or equal to the first pressure threshold (such as 0.11MPa), the service brake release state can be determined. When the driver releases the parking brake, the parking brake air chamber 21 and the parking brake pipeline 20 are in a state of being filled with compressed air. When the second pressure detected by the second pressure sensor 112 disposed on the parking brake pipeline 20 is greater than the second pressure threshold (such as 0.5MPa), the parking brake release state can be determined. That is, when the first pressure detected by the first pressure sensor 111 is less than or equal to the first pressure threshold, and the second pressure detected by the second pressure sensor 112 is greater than the second pressure threshold, it can be determined that the vehicle is in the brake release state.

[0068] Reference Figure 3 , Figure 3 is a first structural diagram of an execution system provided by an embodiment of the present application. Figure 3 As shown, the execution system 130 includes an air supply device 132, a filter pressure reducing valve 133, a three-way solenoid valve 134, a manual control valve 135 and an emergency shut-off valve 131. The three-way solenoid valve includes an air inlet end a, an air outlet end b and an air release end c. The air outlet end of the air supply device 132 is connected to the air inlet end of the filter pressure reducing valve 133, the air outlet end of the filter pressure reducing valve 133 is connected to the air inlet end of the three-way solenoid valve 134, the air outlet end of the three-way solenoid valve 134 is connected to the air inlet end of the manual control valve 135, and the air outlet end of the manual control valve 135 is connected to the port of the emergency shut-off valve 131.

[0069] In an embodiment of the present application, the three-way solenoid valve 134 is electrically connected to the control system 120, so that the three-way solenoid valve 134 can control the closing of the air intake end a of the three-way solenoid valve 134 based on the closing instruction sent by the control system 120, and open the air discharge end c of the three-way solenoid valve 134 to close the emergency shut-off valve 131.

[0070] Specifically, the air supply device 132 may be an air storage cylinder, and the air supply device 132 is used to provide compressed air to the entire execution system 130. The filter pressure reducing valve 133 is used to filter out the oil and water in the compressed air, and then reduce the pressure to a preset air pressure (such as 0.4MPa). The three-way solenoid valve 134 may be a two-position three-way solenoid valve, and the three-way solenoid valve 134 is a normally open valve. When receiving a closing command from the control system 120, the three-way solenoid valve 134 will close the air inlet end a of the three-way solenoid valve 134, and open the air discharge end c of the three-way solenoid valve 134 to discharge the gas from the air outlet end b of the three-way solenoid valve 134 to the air cavity of the emergency shut-off valve 131, so that the emergency shut-off valve 131 can achieve a closing action.

[0071] Reference Figure 4 , Figure 4 is a second structural diagram of an execution system provided by an embodiment of the present application. Figure 4 As shown, the execution system 130 includes an air supply device 132, a filter pressure reducing valve 133, a three-way solenoid valve 134, a first manual three-way valve 1351, a second manual three-way valve 1352, a pneumatic combination valve 1353 and an emergency shut-off valve 131. The air outlet of the air supply device 132 is connected to the air inlet of the filter pressure reducing valve 133, the air outlet of the filter pressure reducing valve 133 is connected to the air inlet of the three-way solenoid valve 134, the air outlet of the three-way solenoid valve 134 is connected to the air inlet of the first manual three-way valve 1351, the air outlet of the first manual three-way valve 1351 is connected to the air inlet of the second manual three-way valve 1352, the air outlet of the second manual three-way valve 1352 is connected to the air inlet of the pneumatic combination valve 1353, and the air outlet of the pneumatic combination valve 1353 is connected to the emergency shut-off valve 131. Among them, the first manual three-way valve 1351, the second manual three-way valve 1352 and the pneumatic combination valve 1353 are respectively set at the corresponding setting positions of the vehicle. For example, the first manual three-way valve 1351 and the second manual three-way valve 1352 can be set on both sides of the middle of the vehicle (such as a semi-trailer), and the pneumatic combination valve 1353 can be set in the rear operating box of the vehicle. When the rear operating box of the vehicle is difficult to approach due to danger, the emergency shut-off valve 131 can be manually closed by the first manual three-way valve 1351 or the second manual three-way valve 1352 set on both sides of the middle of the vehicle.

[0072] Among them, the emergency shut-off valve 131 may include a first emergency shut-off valve 1311, a second emergency shut-off valve 1312 and a third emergency shut-off valve 1313. The first emergency shut-off valve 1311 is arranged on the liquid phase pipeline, the second emergency shut-off valve 1312 is arranged on the gas phase pipeline, and the third emergency shut-off valve 1313 is arranged on the boosting pipeline.

[0073] Correspondingly, the pneumatic combination valve 1353 includes a pneumatic main valve 13531, a first pneumatic sub-valve 13532, a second pneumatic sub-valve 13533 and a third pneumatic sub-valve 13534. The air outlet of the second manual three-way valve 1352 is connected to the air inlet of the pneumatic main valve 13531, the air outlet of the pneumatic main valve 13531 is connected to the air inlet of the first pneumatic sub-valve 13532, the air inlet of the second pneumatic sub-valve 13533 and the air inlet of the third pneumatic sub-valve 13534, the air outlet of the first pneumatic sub-valve 13532 is connected to the port of the first emergency shut-off valve 1311, the air outlet of the second pneumatic sub-valve 13533 is connected to the port of the second emergency shut-off valve 1312, and the air outlet of the third pneumatic sub-valve 13534 is connected to the port of the third emergency shut-off valve 1313. The pneumatic main valve 13531 can simultaneously open and close the first pneumatic sub-valve 13532, the second pneumatic sub-valve 13533 and the third pneumatic sub-valve 13534. The first pneumatic sub-valve 13532 is used to open and close the first emergency shut-off valve 1311, the second pneumatic sub-valve 13533 is used to open and close the second emergency shut-off valve 1312, and the third pneumatic sub-valve 13534 is used to open and close the third emergency shut-off valve 1313.

[0074] It should be noted that if Figure 4 In the structure of the execution system 130 shown, after the three-way solenoid valve 134 receives the closing instruction from the control system 120, the three-way solenoid valve 134 will close the air inlet end a of the three-way solenoid valve 134 and open the air discharge end c of the three-way solenoid valve 134 to discharge the gas from the air outlet end b of the three-way solenoid valve 134 to the air cavity of the emergency cut-off valve 131 (including the first emergency cut-off valve 1311, the second emergency cut-off valve 1312 and the third emergency cut-off valve 1313), so that the emergency cut-off valve 131 (including the first emergency cut-off valve 1311, the second emergency cut-off valve 1312 and the third emergency cut-off valve 1313) can achieve the closing action. That is, after the three-way solenoid valve 134 receives the closing instruction sent by the control system 120, it is necessary to close the first emergency cut-off valve 1311, the second emergency cut-off valve 1312 and the third emergency cut-off valve 1313.

[0075] When the alarm system 150 sends out an audible and visual alarm signal to remind the personnel to manually close the emergency shut-off valve 131, the personnel can manually close the first manual three-way valve 1351 to simultaneously close the first emergency shut-off valve 1311, the second emergency shut-off valve 1312 and the third emergency shut-off valve 1313, or manually close the second manual three-way valve 1352 to simultaneously close the first emergency shut-off valve 1311, the second emergency shut-off valve 1312 and the third emergency shut-off valve 1313. The first emergency shut-off valve 1311, the second emergency shut-off valve 1312 and the third emergency shut-off valve 1313 can also be closed manually by closing the pneumatic main valve 13531. The first emergency shut-off valve 1311, the second emergency shut-off valve 1312 and the third emergency shut-off valve 1313 can also be completely closed by manually closing the first pneumatic sub-valve 13532 to close the first emergency shut-off valve 1311, and by manually closing the second pneumatic sub-valve 13533 to close the second emergency shut-off valve 1312, and by manually closing the third pneumatic sub-valve 13533 to close the first emergency shut-off valve 1313.

[0076] Correspondingly, the monitoring system 140 may include a first position sensor, a second position sensor, and a third position sensor. The first position sensor, the second position sensor, and the third position sensor are all connected to the control system 120. Among them, the first position sensor is connected to the first emergency shut-off valve 1311, and the first position sensor is used to monitor the opening and closing state of the first emergency shut-off valve 1311. The second position sensor is connected to the second emergency shut-off valve 1312, and the second position sensor is used to monitor the opening and closing state of the second emergency shut-off valve 1312. The third position sensor is connected to the third emergency shut-off valve 1313, and the third position sensor is used to monitor the opening and closing state of the third emergency shut-off valve 1313. Specifically, the emergency shut-off valve 131 (including the first emergency shut-off valve 1311, the second emergency shut-off valve 1312, and the third emergency shut-off valve 1313) includes a valve stem, and a disc is provided on the valve stem, and the disc can move up and down following the closing action of the emergency shut-off valve 131. Thus, the first position sensor, the second position sensor, and the third position sensor can monitor the opening and closing state of the corresponding emergency shut-off valve 131 by detecting the position of the disc. A valve handle is provided at the top of the valve stem of the emergency shut-off valve 131 , and relevant personnel can manually open and close the emergency shut-off valve 131 through the valve handle.

[0077] In the embodiment of the present application, the monitoring system 140 can monitor the opening and closing states of the first emergency shut-off valve 1311, the second emergency shut-off valve 1312, and the third emergency shut-off valve 1313, and send a first monitoring signal to the control system 120 when it is detected that at least one of the first emergency shut-off valve 1311, the second emergency shut-off valve 1312, and the third emergency shut-off valve 1313 is in an open state, so that the control system 120 sends a first control signal to the auxiliary brake system 160 and a second control signal to the alarm system 1510 according to the first monitoring signal. The auxiliary brake system 160 controls the vehicle to be in a parking brake state based on the first control signal, and the vehicle cannot start and drive; and the alarm system 150 sends an audible and visual alarm signal based on the second control signal to remind personnel to manually close the emergency shut-off valve 131 that is not closed.

[0078] Reference Figure 5 , Figure 5 It is a flow chart of the emergency shutoff control method of the tank truck provided in an embodiment of the present application, which can be executed by the emergency shutoff control system of the tank truck provided in any embodiment of the present application, including but not limited to steps S510 to S540.

[0079] Step S510, obtaining a first pressure of a vehicle service brake pipeline and a second pressure of a vehicle parking brake pipeline.

[0080] In an embodiment of the present application, a first pressure of the service brake line and a second pressure of the vehicle parking brake line can be obtained first. For example, the first pressure can be obtained by a first pressure sensor arranged on the service brake line, and the second pressure can be obtained by a second pressure sensor arranged on the parking brake line.

[0081] Step S520: determining whether the vehicle is in a brake release state according to the first pressure and the second pressure.

[0082] In the embodiment of the present application, after obtaining the first pressure of the vehicle's service brake pipeline and the second pressure of the vehicle's parking brake pipeline, it is possible to determine whether the vehicle is in a brake release state based on the first pressure and the second pressure. Among them, brake release includes service brake release and parking brake release. The first pressure can be used to determine whether the service brake is released, and the second pressure can be used to determine whether the parking brake is released. When the service brake is released and the parking brake is released, it can be determined that the vehicle is in a brake release state.

[0083] Reference Figure 6 , Figure 6 It is a flowchart of the steps for determining whether the vehicle is in a brake release state according to the first pressure and the second pressure provided in an embodiment of the present application, including but not limited to steps S610 to S640.

[0084] Step S610, determining whether the first pressure is less than or equal to a first pressure threshold;

[0085] Step S620, if the first pressure is less than or equal to the first pressure threshold, determining whether the second pressure is greater than the second pressure threshold;

[0086] Step S630, if the second pressure is greater than the second pressure threshold, determining that the vehicle is in a brake release state;

[0087] Step S640: If the first pressure is greater than the first pressure threshold, or the second pressure is less than or equal to the second pressure threshold, it is determined that the vehicle is not in the brake release state.

[0088] In the embodiment of the present application, when the driver releases the service brake, the service brake chamber 11 and the service brake pipeline 10 are in a state of no compressed air. When the first pressure detected by the first pressure sensor 111 disposed on the service brake pipeline 10 is less than or equal to the first pressure threshold (such as 0.11MPa), the service brake release state can be determined. When the driver releases the parking brake, the parking brake chamber 21 and the parking brake pipeline 20 are filled with compressed air. When the second pressure detected by the second pressure sensor 112 disposed on the parking brake pipeline 20 is greater than the second pressure threshold (such as 0.5MPa), the parking brake release state can be determined. That is, when the first pressure detected by the first pressure sensor 111 is less than or equal to the first pressure threshold, and the second pressure detected by the second pressure sensor 112 is greater than the second pressure threshold, it can be determined that the vehicle is in a brake release state. If the first pressure detected by the first pressure sensor 111 is greater than the first pressure threshold, or the second pressure detected by the second pressure sensor is less than or equal to the second pressure threshold, it can be determined that the vehicle is not in a brake release state.

[0089] Step S530: If the vehicle is in a brake release state, the emergency shut-off valve of the vehicle is controlled to be closed.

[0090] In the embodiment of the present application, when it is determined that the vehicle is in a brake release state based on the first pressure and the second pressure, the emergency shut-off valve of the vehicle is controlled to be closed. Specifically, the control system 120 can send a closing instruction to the execution system 130 when it is determined that the vehicle is in a brake release state, so that the execution system 130 can control the emergency shut-off valve 131 to be closed based on the closing instruction. The embodiment of the present application uses the vehicle being in a brake release state as the basis for closing the emergency shut-off valve 131 to achieve automatic closing of the emergency shut-off valve 131, which can effectively prevent the situation where the emergency shut-off valve 131 is not closed due to human negligence in the sound and light signal reminder method. And the action of releasing the brake of the vehicle occurs before the vehicle speed is generated, so the time of closing the emergency shut-off valve 131 is advanced and the influence of the speed-sensing data deviation on the closing action of the emergency shut-off valve 131 is avoided. The system response of the present application is faster and more reliable.

[0091] Step S540, monitoring the opening and closing state of the emergency shut-off valve and when it is detected that the emergency shut-off valve is in the open state, controlling the vehicle to be in the parking brake state, and controlling the sound and light alarm signal to be issued to remind personnel to manually close the emergency shut-off valve.

[0092] In the embodiment of the present application, it is considered that after the emergency shut-off valve is controlled to be automatically closed, there may be a situation where the emergency shut-off valve is not closed normally. At this time, after the emergency shut-off valve is controlled to be automatically closed, the opening and closing state of the emergency shut-off valve can be continuously monitored. And when it is monitored that the emergency shut-off valve is in an open state, that is, when it is monitored that the emergency shut-off valve is not normally automatically closed, it is necessary to further control the vehicle to be in a parking brake state, and control the emission of an audible and visual alarm signal to remind personnel to manually close the emergency shut-off valve. Specifically, the opening and closing state of the emergency shut-off valve can be monitored by a monitoring system. The monitoring system 140 can send a first monitoring signal to the control system 120 when it is monitored that the emergency shut-off valve is in an open state, so that the control system 120 sends a first control signal to the auxiliary brake system 160 based on the first monitoring signal, so that the auxiliary brake system 160 controls the vehicle to be in a parking brake state according to the first control signal, so that the vehicle cannot start and drive. At the same time, the control system 120 can also send a second control signal to the alarm system 150 based on the first monitoring signal, so that the alarm system 150 emits an audible and visual alarm signal based on the second control signal to remind personnel to manually close the emergency shut-off valve 131. When the embodiment of the present application detects that the emergency shut-off valve is not closed automatically normally, the vehicle can be prevented from starting by controlling the vehicle to be in the parking brake state, thereby achieving zero safety hazards. At the same time, by controlling the emission of sound and light alarm signals, personnel can be reminded to manually close the emergency shut-off valve. If the emergency shut-off valve is not closed, the vehicle cannot start and travel, thereby ensuring the safety of vehicle travel.

[0093] In some embodiments, after controlling the vehicle to be in a parking brake state and controlling the sound and light alarm signals to be issued, the opening and closing state of the emergency shut-off valve may be further monitored. When the emergency shut-off valve is monitored to be in a closed state, the vehicle may be controlled to release the parking brake state, so that after determining that the emergency shut-off valve is closed, the vehicle may start and drive normally. Specifically, after controlling the vehicle to be in a parking brake state and controlling the sound and light alarm signals to be issued, the monitoring system 130 may also monitor the opening state of the emergency shut-off valve 131 in the execution system 130 again, and when the emergency shut-off valve 131 is monitored to be in a closed state, the monitoring system 130 may send a second monitoring signal to the control system 120, so that the control system 120 sends a third control signal to the auxiliary brake system 160 based on the second monitoring signal, so that the auxiliary brake system 160 may control the vehicle to release the parking brake state based on the third control signal. That is, after the vehicle is controlled to be in the parking brake state and the personnel are reminded to manually close the emergency shut-off valve 131, the open state of the emergency shut-off valve 131 can be monitored again through the monitoring system 130. If the emergency shut-off valve 131 is monitored to be in the closed state, that is, the relevant personnel manually closed the emergency shut-off valve 131, at this time, the auxiliary braking system 160 can be used to control the vehicle to release the parking brake state, thereby ensuring that the vehicle can start and drive after the emergency shut-off valve 131 is closed.

[0094] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. An emergency cut-off control system for a tank truck, characterized in that: It includes a sensing system, a control system, an execution system, a monitoring system, an alarm system and an auxiliary braking system; the sensing system, the execution system, the monitoring system, the alarm system and the auxiliary braking system are all connected to the control system, the monitoring system is connected to the execution system, and the execution system includes an emergency shut-off valve; The sensing system is used to sense a first pressure of a vehicle service brake pipeline and a second pressure of a vehicle parking brake pipeline, and transmit the first pressure and the second pressure to the control system; The control system is used to determine whether the vehicle is in a brake release state according to the first pressure and the second pressure, and send a closing instruction to the execution system when it is determined that the vehicle is in a brake release state; The execution system is used to control the closing of the emergency shut-off valve based on the closing instruction; The monitoring system is used to monitor the opening and closing state of the emergency shut-off valve and send a first monitoring signal to the control system when it is detected that the emergency shut-off valve is in an open state; The control system is further used to send a first control signal to the auxiliary brake system and a second control signal to the alarm system according to the first monitoring signal; The auxiliary brake system is used to control the vehicle to be in a parking brake state based on the first control signal; The alarm system is used to send out an audible and visual alarm signal based on the second control signal to remind personnel to manually close the emergency shut-off valve.

2. The system according to claim 1, characterized in that The monitoring system is also used to send a second monitoring signal to the control system when it detects that the emergency shut-off valve is in a closed state. Correspondingly, the control system is also used to send a third control signal to the auxiliary braking system based on the second monitoring signal, so that the auxiliary braking system controls the vehicle to release the parking brake state based on the third control signal.

3. The system according to claim 1 or 2, characterized in that: The sensing system includes a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are both connected to the control system; The first pressure sensor is arranged on the service brake pipeline, and the first pressure sensor is used to sense the first pressure in the service brake pipeline and transmit it to the control system; the service brake pipeline is used to communicate with the service brake air chamber to transport air to the service brake air chamber; The second pressure sensor is arranged on the parking brake pipeline, and is used for sensing the second pressure in the parking brake pipeline and transmitting the second pressure to the control system; the parking brake pipeline is used for communicating with the parking brake air chamber to transport air to the parking brake air chamber.

4. The system according to claim 1 or 2, characterized in that: The execution system further comprises an air supply device, a filter pressure reducing valve, a three-way solenoid valve and at least one manual control valve, wherein the three-way solenoid valve comprises an air inlet end, an air outlet end and an air release end, the air outlet end of the air supply device is communicated with the air inlet end of the filter pressure reducing valve, the air outlet end of the filter pressure reducing valve is communicated with the air inlet end of the three-way solenoid valve, the air outlet end of the three-way solenoid valve is communicated with the air inlet end of the manual control valve, and the air outlet end of the manual control valve is communicated with the port of the emergency shut-off valve; the three-way solenoid valve is electrically connected to the control system; Correspondingly, the execution system is used to control the closing of the emergency shut-off valve based on the closing instruction, including: The three-way solenoid valve closes the air inlet end of the three-way solenoid valve based on the closing instruction, and opens the air discharge end of the three-way solenoid valve to close the emergency shut-off valve.

5. The system according to claim 4, characterized in that The manual control valve includes a first manual three-way valve, a second manual three-way valve and a pneumatic combination valve, the first manual three-way valve, the second manual three-way valve and the pneumatic combination valve are respectively arranged at set positions corresponding to the vehicle, the air outlet end of the three-way solenoid valve is connected to the air inlet end of the first manual three-way valve, the air outlet end of the first manual three-way valve is connected to the air inlet end of the second manual three-way valve, the air outlet end of the second manual three-way valve is connected to the air inlet end of the pneumatic combination valve, and the air outlet end of the pneumatic combination valve is connected to the emergency shut-off valve.

6. The system according to claim 5, characterized in that The emergency shut-off valve comprises a first emergency shut-off valve, a second emergency shut-off valve and a third emergency shut-off valve, wherein the first emergency shut-off valve is arranged on a liquid phase pipeline, the second emergency shut-off valve is arranged on a gas phase pipeline, and the third emergency shut-off valve is arranged on a boosting pipeline; Correspondingly, the pneumatic combination valve includes a pneumatic main valve, a first pneumatic sub-valve, a second pneumatic sub-valve and a third pneumatic sub-valve, the air outlet end of the second manual three-way valve is connected to the air inlet end of the pneumatic main valve, the air outlet end of the pneumatic main valve is connected to the air inlet end of the first pneumatic sub-valve, the air inlet end of the second pneumatic sub-valve and the air inlet end of the third pneumatic sub-valve, the air outlet end of the first pneumatic sub-valve is connected to the port of the first emergency shut-off valve, the air outlet end of the second pneumatic sub-valve is connected to the port of the second emergency shut-off valve, and the air outlet end of the third pneumatic sub-valve is connected to the port of the third emergency shut-off valve; The pneumatic main valve is used to simultaneously control the opening and closing of the first pneumatic sub-valve, the second pneumatic sub-valve and the third pneumatic sub-valve; The first pneumatic sub-valve is used to control the opening and closing of the first emergency shut-off valve, the second pneumatic sub-valve is used to control the opening and closing of the second emergency shut-off valve, and the third pneumatic sub-valve is used to control the opening and closing of the third emergency shut-off valve.

7. The system according to claim 6, characterized in that The monitoring system includes a first position sensor, a second position sensor, and a third position sensor; The first position sensor is connected to the first emergency shut-off valve, and the first position sensor is used to monitor the opening and closing state of the first emergency shut-off valve; The second position sensor is connected to the second emergency shut-off valve, and the second position sensor is used to monitor the opening and closing state of the second emergency shut-off valve; The third position sensor is connected to the third emergency shut-off valve, and the third position sensor is used to monitor the opening and closing state of the third emergency shut-off valve; Correspondingly, the monitoring system is used to monitor the opening and closing state of the emergency shut-off valve and send a first monitoring signal to the control system when the emergency shut-off valve is detected to be in an open state, including: Monitor the opening and closing states of the first emergency shut-off valve, the second emergency shut-off valve and the third emergency shut-off valve, and send a first monitoring signal to the control system when it is monitored that at least one of the first emergency shut-off valve, the second emergency shut-off valve and the third emergency shut-off valve is in an open state.

8. The system according to claim 1, characterized in that The control system is used to determine whether the vehicle is in a brake release state according to the first pressure and the second pressure, including: Determining whether the first pressure is less than or equal to a first pressure threshold, and determining whether the second pressure is greater than a second pressure threshold; If the first pressure is less than or equal to the first pressure threshold, and the second pressure is greater than the second pressure threshold, it is determined that the vehicle is in a brake release state.

9. An emergency cut-off control method for a tank truck, characterized in that: The method comprises: Acquiring a first pressure of a vehicle service brake pipeline and a second pressure of a vehicle parking brake pipeline; determining whether the vehicle is in a brake release state according to the first pressure and the second pressure; If the vehicle is in a brake release state, the emergency shut-off valve of the vehicle is controlled to be closed; The opening and closing state of the emergency shut-off valve is monitored and when the emergency shut-off valve is detected to be in an open state, the vehicle is controlled to be in a parking brake state, and an audible and visual alarm signal is controlled to be issued to remind personnel to manually close the emergency shut-off valve.

10. The method according to claim 9, characterized in that After controlling the vehicle to be in a parking brake state and controlling the sound and light alarm signals to be emitted, the method further includes: The open and closed state of the emergency shut-off valve is monitored and when it is detected that the emergency shut-off valve is in a closed state, the vehicle is controlled to release the parking brake state.

Images