Liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompt

Abstract

The utility model relates to the technical field of hazardous chemical substance loading and unloading operation, in particular to a liquefied hydrocarbon loading and unloading vehicle interlocking control system with a voice prompt function, which comprises a liquefied hydrocarbon loading and unloading crane pipe, a loading and unloading arm connected onto the liquefied hydrocarbon loading and unloading crane pipe, a special joint connected onto the loading and unloading arm, a voice interlocking controller and a detection switch, the voice linkage controller is connected with a cable, the cable extends to the special connector along the loading and unloading arm and is connected with the detection switch, when the special connector and the tank are locked / unlocked, the detection switch transmits an electric signal to the voice linkage controller, and the voice linkage controller sends out a prompt signal. The utility model has the following beneficial effects: the system can carry out real-time monitoring and voice prompt on the locking state of the joint, and can send out a signal to close the pump valve when the joint is accidentally disengaged, thereby realizing emergency cut-off of material transmission at the crane pipe end.

Description

Technical Field

[0001] The utility model relates to the technical field of hazardous chemical loading and unloading operations, in particular to a liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts. Background Art

[0002] The main modes of inland transportation of liquefied hydrocarbon materials are pipeline transportation and tank truck filling transportation. The transportation process involves material loading and unloading operations. At present, the crane pipe is widely used. That is, the crane pipe is connected to the tank truck by a quick female connector at the butt end of the connector, and the male connector on the tank is locked by turning the fastener on the connector. Then the pump valve is opened for filling.

[0003] Since conventional quick connectors rely entirely on mechanical structures to lock the tank truck, they do not have locking status detection and safety interlocking functions. Operator negligence, errors, or wear and failure of locking parts can easily lead to accidental disconnection of the crane pipe and the tank truck during loading and unloading, causing large-scale leakage. The leaked liquefied hydrocarbons will cause an explosion if they encounter an ignition source.

[0004] At approximately 1:00 AM on June 5, 2017, a liquefied hydrocarbon tanker truck suffered a massive leak of liquefied gas during unloading operations at the storage and transportation department of Linyi Jinyu Petrochemical Co., Ltd., resulting in a major explosion and fire. The accident resulted in 10 deaths, 9 injuries, and direct economic losses exceeding 40 million yuan. An investigation determined that the accident was caused by a quick-connect coupling on the crane pipe that was not securely connected to the tanker truck, causing it to separate during valve opening, leading to a massive leak of liquefied gas from the tank and the resulting explosion. Utility Model Content

[0005] The purpose of the utility model is to provide a liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts, which can monitor the locking status of the joint in real time and provide voice prompts, and can send a signal to shut down the pump valve when the joint is accidentally disengaged, thereby realizing emergency cutting off of material transmission at the crane pipe end.

[0006] The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions: a liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts, including a liquefied hydrocarbon loading and unloading crane pipe, the liquefied hydrocarbon loading and unloading crane pipe is connected to a loading and unloading arm, the loading and unloading arm is connected to a special joint, and also includes a voice interlocking controller and a detection switch, the voice interlocking controller is connected to a cable, the cable extends along the loading and unloading arm to the special joint and is connected to the detection switch, when the special joint is locked / unlocked with the tank, the detection switch transmits an electrical signal to the voice interlocking controller, and the voice interlocking controller sends a prompt signal.

[0007] Preferably, a breakaway valve is provided on the loading and unloading arm.

[0008] Preferably, the cable is provided with an explosion-proof plug.

[0009] Preferably, the loading and unloading arm includes a gas phase arm for conveying the gas phase and a liquid phase arm for conveying the liquid phase, and the special joint includes a gas phase special joint installed on the gas phase arm and a liquid phase special joint installed on the liquid phase arm, and the gas phase arm and the liquid phase arm are both provided with the cables, break valves and explosion-proof pins.

[0010] Preferably, the detection switch is a proximity switch or a travel switch.

[0011] Preferably, the voice interlocking controller is provided with a "locked" status light and an "unlocked" status light. When the signal is abnormal, the "unlocked" status light lights up for early warning, and when the signal is normal, the "locked" status light lights up.

[0012] Preferably, the voice interlocking controller is provided with a voice controller and a loudspeaker, and a voice prompt is issued when the signal is abnormal, the signal is normal or the detection switch fails.

[0013] Preferably, the voice interlocking controller is provided with a "loaded / unloaded" button, a "loaded" status light, and an "unloaded" status light, and the loaded and unloaded states can be switched by pressing the "loaded / unloaded" button.

[0014] Preferably, the voice interlocking controller is connected to the loading control system. When the voice interlocking controller switches to the loading state, the loading control system can control the pumps and valves to load the vehicle. When the voice interlocking controller switches to the unloaded state, the loading control system cannot control the pumps and valves to load the vehicle.

[0015] As a preferred embodiment, the "loaded / not loaded" button is connected to the voice controller, and the voice controller can be activated when the "loaded / not loaded" button is pressed.

[0016] In summary, the present invention has the following beneficial effects:

[0017] The system can monitor the locking status of the joint in real time and provide voice prompts. It can also send a signal to shut down the pump valve when the joint is accidentally disengaged, thereby urgently cutting off the material transmission at the crane pipe end. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the scene when loading and unloading liquefied hydrocarbon crane pipes onto trucks;

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of part A in the middle;

[0020] Figure 3 It is a structural diagram of the voice interlocking controller;

[0021] Figure 4This is a schematic diagram of the connection relationship between the PLC and each module inside the voice interlocking controller.

[0022] In the figure, 1. Liquefied hydrocarbon loading and unloading crane pipe; 2. Voice interlocking controller; 3. Gas phase arm; 4. Liquid phase arm; 5. Breakaway valve; 6. Special connector; 7. Cable; 8. Proximity switch; 9. Explosion-proof plug. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0025] Example:

[0026] like Figure 1-Figure 2 As shown, the system includes a liquefied hydrocarbon loading and unloading crane 1 and a voice-interlocked controller 2. Connected to the liquefied hydrocarbon loading and unloading crane 1 are loading arms, which include a gas phase arm 3 for transporting the gas phase and a liquid phase arm 4 for transporting the liquid phase. Both the gas phase arm 3 and the liquid phase arm 4 are equipped with a breakaway valve 5 and a dedicated connector 6. The dedicated connector 6 on the gas phase arm 3 is dedicated to the gas phase, while the dedicated connector 6 on the liquid phase arm 4 is dedicated to the liquid phase.

[0027] The voice interlocking controller 2 is connected to two cables 7, which extend along the gas phase arm 3 and the liquid phase arm 4 and are connected to the gas phase arm 3 and the liquid phase arm 4 respectively. The ends of each cable 7 are respectively connected to a detection switch, which can be a travel switch or a proximity switch 8. In this embodiment, a proximity switch 8 is used. The proximity switch 8 is installed at the special connector 6 to monitor the locking and unlocking status of the special connector 6. The displacement action of the locking part of the special connector 6 triggers the response of the proximity switch 8 and uploads the signal at the same time. An explosion-proof plug 9 is connected to each cable 7. The explosion-proof plug 9 can be disconnected at the same time when the crane pipe pull-off valve 5 is disconnected, protecting the cable 7 from being torn off, causing the wire core to be exposed and short-circuited, or causing damage to the terminal electronic components.

[0028] like Figure 3-Figure 4 As shown, the voice interlock controller 2 is externally equipped with a "Loaded / Unloaded" button, a "Loaded" status light, a "Unloaded" status light, a "Locked" status light, and a "Unlocked" status light. Internally, it houses the voice controller, a speaker, a PLC, a safety barrier, a relay, a terminal block, and other components. Repeatedly pressing the "Loaded / Unloaded" button switches between the loaded and unloaded states.

[0029] If the signal is abnormal (i.e., the locking signal is not detected), the on-site voice interlock controller 2 will issue a voice prompt, continuously broadcasting the voice content "Connector is not locked, please check and confirm" until the abnormality is resolved. At the same time, the "unlocked" status light will illuminate as a warning. At this time, the "voice interlock controller to DCS loading permission signal" will lose power, and the loading control system will be unable to control the pumps and valves to load the vehicle.

[0030] When the signal is normal, that is, when the locking signal is detected, the on-site voice interlocking controller 2 will issue a voice prompt, broadcasting the voice content of "the connector is locked and loading is ready" 2 to 3 times, and the "locking" status light will light up. At this time, the "voice interlocking controller to DCS loading permission signal" is energized, and the loading control system can control the pump valve to load the vehicle.

[0031] When the proximity switch 8 or the travel switch fails, such as being disconnected or short-circuited, the on-site voice interlock controller 2 will issue a voice prompt and continue to broadcast the voice content of "Connector communication failure, please check and confirm" until the abnormality is resolved. At this time, the "voice interlock controller to DCS loading permission signal" loses power, and the loading control system cannot control the pump valve to load the vehicle.

[0032] Directions:

[0033] Before each loading session, the DCS loading system program performs initialization, automatically resetting the "Loaded / Unloaded" button. This means the "Loaded" status light turns off and the "Unloaded" status light turns on. The "Loaded / Unloaded" button is interlocked with the loading and unloading control system. Before the button is pressed to switch to the loading state (i.e., when the vehicle is not loaded), the pumps and valves in the pipeline cannot be controlled to open. Therefore, the button also serves as an emergency stop button. Furthermore, the button is interlocked with the voice control. Pressing the button to switch to the loading state activates the voice control. Before each loading session, the dedicated connector 6 must be locked before pressing the button. This silences the voice prompt during the unlocking phase when docking with the tanker, reducing noise pollution.

[0034] Only when the dedicated connector 6 is locked, the locking signal is normal, and the "loading / not loading" button is pressed, can the pipeline pump valve be controlled to open and the loading operation can continue. This can effectively avoid the dedicated connector 6 not being locked due to negligence or errors in operation, and accidental disengagement due to unreliable locking, which in turn causes uncontrollable leakage.

[0035] After the pump valve is shut down after loading and unloading, press the "Loading / Not Loading" button first. At this time, the "Loading" status light will go out and the "Not Loading" status light will light up. Then unlock the special connector 6 of the crane pipe from the tank truck and reset the crane pipe to end the loading process.

Claims

1. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts, comprising a liquefied hydrocarbon loading and unloading crane pipe (1), a loading and unloading arm connected to the liquefied hydrocarbon loading and unloading crane pipe (1), and a dedicated joint (6) connected to the loading and unloading arm, characterized in that: The device further comprises a voice interlocking controller (2) and a detection switch. The voice interlocking controller (2) is connected to a cable (7). The cable (7) extends along the loading and unloading arm to a dedicated joint (6) and is connected to the detection switch. When the dedicated joint (6) is locked or unlocked with the tank, the detection switch transmits an electrical signal to the voice interlocking controller (2), and the voice interlocking controller (2) issues a prompt signal.

2. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 1, characterized in that: A breakaway valve (5) is provided on the loading and unloading arm.

3. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 2, characterized in that: An explosion-proof plug (9) is provided on the cable (7).

4. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 3, characterized in that: The loading and unloading arm comprises a gas phase arm (3) for conveying a gas phase and a liquid phase arm (4) for conveying a liquid phase, the dedicated joint (6) comprises a gas phase dedicated joint installed on the gas phase arm (3) and a liquid phase dedicated joint installed on the liquid phase arm (4), and the gas phase arm (3) and the liquid phase arm (4) are both provided with the cable (7), the breakaway valve (5), and the explosion-proof plug (9).

5. The liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 1 is characterized in that: The detection switch is a proximity switch or a travel switch.

6. The liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 1, characterized in that: The voice interlocking controller (2) is provided with a "locked" status light and an "unlocked" status light. When the signal is abnormal, the "unlocked" status light is on to give an early warning, and when the signal is normal, the "locked" status light is on.

7. The liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 1 is characterized in that: The voice interlocking controller (2) is provided with a voice controller and a loudspeaker, and emits a voice prompt when a signal is abnormal, a signal is normal, or a detection switch failure occurs.

8. The liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 7, characterized in that: The voice interlocking controller (2) is provided with a "loaded / unloaded" button, a "loaded" status light, and an "unloaded" status light. The loaded and unloaded states are switched by pressing the "loaded / unloaded" button.

9. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 8, characterized in that: The voice interlocking controller (2) is connected to the vehicle loading control system. When the voice interlocking controller (2) switches to the vehicle loading state, the vehicle loading control system can control the pump and valve to load the vehicle. When the voice interlocking controller (2) switches to the vehicle unloading state, the vehicle loading control system cannot control the pump and valve to load the vehicle.

10. A liquefied hydrocarbon loading and unloading vehicle interlocking control system with voice prompts according to claim 9, characterized in that: The "Loading / Not Loading" button is connected to the voice controller. When the "Loading / Not Loading" button is pressed, the voice controller can be activated.

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