CN205045815U - Crane position loading safety interlock control system - Google Patents

Abstract

The utility model relates to a safety interlocking control system for crane loading of oil and chemical products. Crane tube homing detection module for detecting the position of crane tube, oil spill alarm module for detecting oil level, control module for receiving signals from the above modules and making judgment processing, and controlled by the control module for controlling whether to carry out Action mechanism for refueling operation. The utility model is suitable for all gasoline and diesel oiling cranes in the petrochemical industry. During the oiling process, the electrostatic elimination of the human body and the vehicle can eliminate the large amount of electrostatic charge carried by the driver and the vehicle, and eliminate a great deal of safety for the entire oiling process. Hidden danger. Pollution and waste caused by oil spills are avoided through crane pipe homing detection and oil spill alarm detection.

Description

A Crane Position Loading Safety Interlock Control System

technical field

The utility model relates to a safety interlock control system, in particular to a safety interlock control system for crane loading of oil and chemical products.

Background technique

When the company's vehicles are loaded with oil at the loading crane, most drivers wear chemical fiber clothes that are prone to electrostatic charge, and the vehicle is running at high speed on the road. When filling gasoline, diesel or liquefied petroleum gas, if the accumulated large amount of electrostatic charge is not removed in time, if the concentration of combustible gas on the scene is high when the driver performs fuel delivery operation at the loading crane position, the electrostatic charge generated by the driver or the vehicle will not be released. Eliminate, cause very big potential safety hazard to whole filling oil process. In addition, when the crane tube deviates from the normal working position or cannot be found in time after filling up, serious pollution and waste will be caused.

Contents of the invention

In view of the above problems, the utility model provides a safety interlocking control system for crane loading, which integrates multiple functions of human body static elimination, vehicle static elimination, crane pipe homing, and oil spill alarm. In order to solve the above problems, the technical solution adopted by the utility model is: a safety interlock control system for crane loading, including a human body static elimination module for realizing the safe discharge of static electricity of the human body, and a module for realizing the safe discharge of vehicle static electricity. Vehicle static elimination module, crane tube homing detection module for detecting the position of crane tube, oil overflow alarm module for detecting oil level, control module for receiving signals from the above modules and making judgment processing, and controlled by the control system The action mechanism of the module used to control whether to perform refueling operation. When the driver arrives at the scene to deliver oil (or install liquefied petroleum gas), he must first perform human body static elimination, vehicle static elimination, and crane pipe homing detection. The above three are logical "and" relationships in the PLC controller program, and three conditions are required Only when all of them are satisfied can the oil be delivered normally. If one item is not satisfied, the automatic control specification loading operation procedure does not allow the oil delivery (or liquefied gas) operation.

The control module adopts PLC controller. The entire loading system is composed of 28 crane seat PLC controllers and 1 main PLC controller, which transmit a large amount of data between each other. The Ethernet communication module using PLC is relatively stable and has a long transmission distance; It is easy to maintain. If there is an abnormality in the system, you can directly replace the corresponding module, which can solve the problem in a short time and improve the benefit for the company.

The actuating mechanism is a vehicle loading cut-off valve. The loading cut-off valve is installed at one end of the crane pipe, and performs refueling operations according to the received signal from the PLC controller.

The human body static elimination module adopts a human body electrostatic touch ball made of an electrostatic subconductor, the human body electrostatic touch ball automatically detects the human body electrostatic resistance, and safely releases static electricity, and the human body electrostatic touch ball transmits the detected resistance signal to the PLC controller, and the PLC The controller receives the signal and makes a judgment. The human body electrostatic touch ball overcomes the shortcomings of the current human body electrostatic discharger. It prolongs the electrostatic discharge time and greatly reduces the instantaneous electrostatic energy. Risk of fire and explosion accidents. The human body electrostatic touch ball is installed on the receiving and dispatching crane of oil and gas to prevent fire and explosion accidents caused by static electricity carried by the human body during loading and unloading of flammable, explosive and other dangerous goods. When the vehicle is filling gasoline and diesel at the crane position, the driver must first touch the human body electrostatic touch ball with his hands, and the human body electrostatic touch ball automatically detects the body's electrostatic resistance and safely releases static electricity. When the human body touches the electrostatic touch ball, no electric shock will be generated, and the sound and light alarm installed in the explosion-proof box reminds the human body that the contact with the electrostatic touch ball is reliable and the static electricity is discharged. If the driver does not touch the electrostatic touch ball or the electrostatic resistance of the human body is greater than 5 ohms, the PLC controller outputs a signal that no fuel is allowed to the loading cut-off valve. When the system detects that the static electricity of the human body is normal, it automatically enters the next loading behavior regulation link.

The vehicle static elimination module uses a static ground clip connected to the static ground wire to discharge static electricity, and judges by detecting the resistance value between the static ground clip and the static ground wire through the resistance module of the PLC controller. After the driver completes the human body static elimination operation, connect the vehicle static grounding clamp to the vehicle's metal conductor, that is, the static grounding wire, and the vehicle performs static discharge, and the resistance value between the static grounding clamp and the static grounding wire is detected by the resistance module of the PLC controller Make a judgment, if the resistance between the electrostatic grounding clamp and the electrostatic grounding wire is less than 10Ω, and the connection time is greater than 5 seconds, then it is judged that the static electricity is eliminated; when the system detects that the static electricity of the vehicle is eliminated normally, then the system will automatically enter the next loading behavior specification link . The PLC controller resistance module is a clamp in the PLC controller.

The crane tube homing module adopts a crane tube homing sensor, and the crane tube homing sensor sends the detected position information of the crane tube to the PLC controller, and the PLC controller receives the signal and judges whether the position of the crane tube is normal. After the normal operation of human body static elimination and vehicle static elimination is correct, the driver puts the crane tube divided into vertical, horizontal and vertical sections into the tanker. The homing sensor is installed on the horizontal section. When the angle between the horizontal section crane tube and the vertical crane tube is less than At 90°, the crane homing sensor sends a normal signal of the crane to the PLC controller. At this time, the PLC controller can output a signal that the oil can be sent normally to the loading cut-off valve. If the crane is pulled out or tilted during the loading process (horizontal When the angle between the section crane tube and the vertical crane tube is greater than 90°), the crane tube homing sensor sends a signal of abnormal position of the crane tube to the PLC controller, the loading cut-off valve is closed, and the loading and oiling stop, and the crane tube is adjusted to normal and then continues Hair oil.

The oil spill alarm module includes a three-wire liquid level switch fixed on the upper part of the crane pipe at a distance of 15-20 cm from the loading port. The liquid level switch sends the liquid level information to the PLC controller, and the PLC controller judges and judges the result Feedback to the loading shut-off valve. When the oil level is immersed in the liquid level switch, the probe switch is closed, and the signal is sent to the PLC controller. After the PLC controller judges and sends the valve closing signal and alarm signal, the loading cut-off valve is interlocked to stop oil delivery, and the crane position alarm emits sound and light. Call the police.

The utility model optimizes the electrostatic interlocking system of the loading system, and modifies the upper software Cimplicity and the lower software VersaPro that come with the crane, so that every step of the driver's operation is integrated into the software management, so that equipment and people can get the essence security control. The loading wireless IC card system is written into the program, so that every step of the driver's operation can be detected in real time in the software. Through our standardized interlocking control program for the loading process system, we have step-by-step constraints on every loading link of the driver, so that the potential safety hazards in it are eliminated one by one. The vehicle loading instrument uniformly uses the IC card to swipe the card to send oil and load the car. Customers only need an IC card to experience safe, risk-free, efficient and fast crane position oil loading.

The utility model is suitable for all gasoline and diesel oiling cranes in the petrochemical industry. During the oiling process, the electrostatic elimination of the human body and the vehicle eliminates the large amount of electrostatic charge carried by the driver and the vehicle, and eliminates great safety for the entire oiling process. Hidden danger. Pollution and waste caused by oil spills are avoided through crane pipe homing detection and oil spill alarm detection.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is the structural representation of the utility model;

Among them, 1. PLC controller, 2. Loading shut-off valve, 3. Human body electrostatic touch ball, 4. Static grounding clip, 5. Static grounding wire, 6. Crane tube homing sensor, 7. Crane tube, 8. Liquid bit switch.

detailed description

A crane loading safety interlock control system, including a human body static elimination module for realizing the safe discharge of human static electricity, a vehicle static elimination module for realizing the safe discharge of vehicle static electricity, and a crane tube for detecting the position of the crane tube The homing detection module, the oil overflow alarm module used to detect the oil level, the control module used to receive the signals of the above modules and make judgments, and the action mechanism controlled by the control module to control whether to perform refueling operations, all The above-mentioned control module adopts PLC controller 1, and the above-mentioned action mechanism is the loading cut-off valve 2.

The human body static elimination module adopts the human body static touch ball 3 made of static subconductor material, the human body static touch ball 3 automatically detects the human body static resistance, safely releases static electricity and the human body static touch ball 3 transmits the detected resistance signal to the PLC controller 1. PLC controller 1 receives the signal and makes a judgment. The vehicle static elimination module adopts the static grounding clamp 4 connected with the static grounding wire 5 to discharge static electricity, and judges by detecting the resistance value between the static grounding clamp 4 and the static grounding wire 5 through the PLC controller 1 resistance module. The crane tube homing module adopts the crane tube homing sensor 6, and the crane tube homing sensor 6 sends the detected crane tube position information to the PLC controller 1, and the PLC controller 1 receives the signal and judges whether the crane tube position is normal . When the above three tests are all normal, the PLC controller 1 sends a refueling signal, and the loading cut-off valve 2 opens. The oil spill alarm module includes a three-wire liquid level switch 8 fixed on the upper part of the crane pipe 7 at a distance of 15 to 20 cm from the loading port. Judge and feed back the judgment result to the loading cut-off valve 2.

Claims (7)

1. A crane loading safety interlock control system, characterized in that: it includes a human body static elimination module for realizing the safe discharge of human static electricity, a vehicle static elimination module for realizing the safe discharge of vehicle static electricity, and a vehicle static elimination module for detecting Crane tube homing detection module for crane tube position, oil overflow alarm module for detecting oil level, control module for receiving signals from the above modules and making judgment processing, and controlled by the control module for controlling whether to refuel The operating mechanism. 2. The crane station loading safety interlock control system according to claim 1, characterized in that: said control module adopts a PLC controller. 3. The crane loading safety interlock control system according to claim 1 or 2, characterized in that: the action mechanism is a loading cut-off valve. 4. The crane loading safety interlock control system according to claim 2, characterized in that: the human body static elimination module adopts a human body electrostatic touch ball made of an electrostatic subconductor, and the human body electrostatic touch ball automatically detects the human body electrostatic resistance , Safely release static electricity and the human body electrostatic touch ball transmits the detected resistance signal to the PLC controller, and the PLC controller receives the signal and makes a judgment. 5. The crane loading safety interlock control system according to claim 2, characterized in that: the vehicle static elimination module uses a static grounding clip connected to the static grounding wire to discharge static electricity, and through the PLC controller resistance The module detects the resistance value between the electrostatic grounding clamp and the electrostatic grounding wire for judgment. 6. The crane position loading safety interlock control system according to claim 2, characterized in that: the crane homing module adopts a crane homing sensor, and the crane homing sensor detects the position of the crane The information is sent to the PLC controller, and the PLC controller receives the signal and judges whether the position of the crane tube is normal. 7. The crane loading safety interlock control system according to claim 3, characterized in that: the oil spill alarm module includes a three-wire liquid level switch fixed on the upper part of the crane pipe at a distance of 15 to 20 cm from the loading port , the liquid level switch sends the liquid level information to the PLC controller, which is judged by the PLC controller and fed back to the loading shut-off valve.