阅读说明：本技术 一种运输车车载卸液泵的控制装置及方法 (Control device and method for vehicle-mounted liquid unloading pump of transport vehicle ) 是由 姜星 毛海涛 郑尚和 谢少卿 彭彬 于 2021-05-20 设计创作，主要内容包括：本申请提供了一种运输车车载卸液泵的控制装置及方法,控制装置包括：设置在卸液泵的泵头上的温度传感器；设置在卸液泵的输出端上的压力传感器；设置在运输车的阀门箱中的GPS定位器；以及设置在阀门箱中的泵控制箱,泵控制箱的外壁上设置有指示灯,且泵控制箱的内部设置有PLC控制器,PLC控制器与指示灯电连接；其中,泵控制箱中的PLC控制器还分别与温度传感器、压力传感器以及GPS定位器电连接。通过温度传感器和压力传感器分别实时监测卸液泵的温度值和压力值,能够对卸液泵发生过热或低压现象进行停泵保护,通过GPS定位器实时获取当前运输车的位置信息并传输至泵控制箱的PLC控制器,使得带卸液泵的罐车只有在指定卸液地点,才能开启卸液泵。(The application provides a control device and a method for a vehicle-mounted liquid unloading pump of a transport vehicle, wherein the control device comprises: the temperature sensor is arranged on a pump head of the liquid unloading pump; the pressure sensor is arranged on the output end of the liquid unloading pump; the GPS positioner is arranged in a valve box of the transport vehicle; the outer wall of the pump control box is provided with an indicator lamp, and the interior of the pump control box is provided with a PLC (programmable logic controller) which is electrically connected with the indicator lamp; wherein, the PLC controller in the pump control box is still connected with temperature sensor, pressure sensor and GPS locator electricity respectively. Temperature value and pressure value of the liquid unloading pump are monitored in real time through the temperature sensor and the pressure sensor respectively, the liquid unloading pump can be subjected to overheat or low-pressure phenomenon for pump stop protection, the position information of the current transport vehicle is acquired in real time through the GPS positioner and is transmitted to the PLC of the pump control box, and the liquid unloading pump can be started only at a specified liquid unloading place of the tank car with the liquid unloading pump.)

1. The utility model provides a controlling means of on-vehicle liquid discharging pump of transport vechicle which characterized in that includes:

the temperature sensor is arranged on a pump head of the liquid unloading pump;

the pressure sensor is arranged on the output end of the liquid unloading pump;

the GPS positioner is arranged in a valve box of the transport vehicle; and

the pump control box is arranged in the valve box, an indicator lamp is arranged on the outer wall of the pump control box, a PLC (programmable logic controller) is arranged in the pump control box, and the PLC is electrically connected with the indicator lamp;

the PLC in the pump control box is also electrically connected with the temperature sensor, the pressure sensor and the GPS positioner respectively.

2. The control device of a liquid discharge pump on a transport vehicle of claim 1, further comprising a remote controller, wherein the remote controller is connected with the pump control box through a cable.

3. The control device of the liquid unloading pump on the transport vehicle according to claim 1, wherein the pump control box is mounted on the inner wall of the valve box through a fixed bracket.

4. A control method for a liquid discharge pump on a carrier vehicle is characterized by comprising the following steps:

acquiring the position information of the current transport vehicle in real time based on a GPS positioner, and judging whether the current transport vehicle is in a preset fixed point liquid unloading area;

if the current transport vehicle is in a preset fixed-point liquid unloading area, controlling a liquid unloading pump to carry out precooling treatment;

acquiring the temperature information of the current liquid unloading pump in real time based on a temperature sensor, and judging whether the temperature value of the current liquid unloading pump is not greater than a preset threshold value or not;

if the current temperature value of the liquid discharge pump is not greater than a preset threshold value, controlling the liquid discharge pump to operate, wherein the operation of the liquid discharge pump comprises motor star-shaped operation and motor angle-shaped operation;

acquiring a pressure value of the output end of the liquid unloading pump in real time based on the pressure sensor, and judging whether the pressure value of the output end of the current liquid unloading pump is lower than a preset pressure value or not;

and if the pressure value of the output end of the current liquid unloading pump is lower than the preset pressure value, controlling the liquid unloading pump to stop running.

5. The method of controlling a liquid discharge pump on a transporter according to claim 4, further comprising:

when the liquid unloading pump runs, detecting whether a reset signal exists within a preset time threshold;

and if no reset signal is detected within a preset time threshold, controlling the liquid unloading pump to stop running.

Technical Field

The invention relates to the field of low-temperature liquid transport vehicle manufacturing, in particular to a control device and a control method for a vehicle-mounted liquid unloading pump of a transport vehicle.

Background

The low-temperature liquid transportation tank car for liquid oxygen, liquid nitrogen, liquid argon and the like adopts a pump to unload liquid more quickly and has higher efficiency. The liquid unloading pump needs to be precooled before running, so that the medium passing through the pump is ensured to be liquid so as to prevent the pump from generating cavitation, but the precooling cannot be visually judged if the medium is in place, and an operator temporarily leaves during the running of the liquid unloading pump, so that the automatic operation of the control device is possible to damage the liquid unloading pump, and a great potential safety hazard is brought to a liquid unloading site.

Disclosure of Invention

In view of the above, the main purpose of the present invention is to solve the problems that the pre-cooling of the liquid discharging pump cannot be intuitively judged, and the liquid discharging pump is easily damaged by the automatic operation of the control device when the liquid discharging pump is temporarily away from the operator,

the invention provides a control device of a vehicle-mounted liquid unloading pump of a transport vehicle, which comprises: the temperature sensor is arranged on a pump head of the liquid unloading pump; the pressure sensor is arranged on the output end of the liquid unloading pump; the GPS positioner is arranged in a valve box of the transport vehicle; the outer wall of the pump control box is provided with an indicator lamp, a PLC (programmable logic controller) is arranged in the pump control box, and the PLC is electrically connected with the indicator lamp; the PLC in the pump control box is also electrically connected with the temperature sensor, the pressure sensor and the GPS positioner respectively.

In some embodiments of the invention, the control device further comprises a remote controller connected to the pump control box by a cable.

In some embodiments of the invention, the pump control box is mounted on the inner wall of the valve box by a fixed bracket.

The invention also provides a control method of the vehicle-mounted liquid discharging pump of the transport vehicle, which comprises the following steps: acquiring the position information of the current transport vehicle in real time based on a GPS positioner, and judging whether the current transport vehicle is in a preset fixed point liquid unloading area; if the current transport vehicle is in a preset fixed-point liquid unloading area, controlling a liquid unloading pump to carry out precooling treatment; acquiring the temperature information of the current liquid unloading pump in real time based on a temperature sensor, and judging whether the temperature value of the current liquid unloading pump is not greater than a preset threshold value or not; if the current temperature value of the liquid discharge pump is not greater than a preset threshold value, controlling the liquid discharge pump to operate, wherein the operation of the liquid discharge pump comprises motor star-shaped operation and motor angle-shaped operation; acquiring a pressure value of the output end of the liquid unloading pump in real time based on the pressure sensor, and judging whether the pressure value of the output end of the current liquid unloading pump is lower than a preset pressure value or not; and if the pressure value of the output end of the current liquid unloading pump is lower than the preset pressure value, controlling the liquid unloading pump to stop running.

In some embodiments of the invention, the method further comprises: when the liquid unloading pump runs, detecting whether a reset signal exists within a preset time threshold; and if no reset signal is detected within a preset time threshold, controlling the liquid unloading pump to stop running.

The control device and the method for the vehicle-mounted liquid unloading pump of the transport vehicle have the following beneficial effects that:

1. through setting up remote control ware, can be convenient for on-the-spot operating personnel remote control to send reset signal to the PLC controller in the pump control box through remote control ware in the time quantum of predetermineeing, whether can real-time supervision operating personnel is on the scene when unloading the liquid pump operation, thereby reduce because operating personnel leaves temporarily, controlling means automatic operation produces the phenomenon emergence of damage to unloading the liquid pump.

2. Temperature and pressure values of the liquid unloading pump are monitored in real time through the temperature sensor and the pressure sensor respectively, and pump stop protection can be carried out on the phenomenon that the liquid unloading pump is overheated or low-pressure.

3. The GPS positioner is arranged in the valve box of the transport vehicle, the current position information of the transport vehicle is acquired in real time through the GPS positioner and is transmitted to the PLC controller of the pump control box, so that the liquid unloading pump can be started for unloading liquid only at the appointed liquid unloading place of the tank car with the liquid unloading pump.

Drawings

FIG. 1 is a side view showing the structural arrangement of a control device of a liquid discharge pump mounted on a transport vehicle according to an embodiment of the present invention;

FIG. 2 is a top view of the structural arrangement of a control device of a liquid discharge pump mounted on a transport vehicle according to an embodiment of the present invention;

fig. 3 is a control schematic diagram of a control device of a liquid discharge pump mounted on a transport vehicle according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. unloading the liquid pump; 2. a pump control box; 3. a temperature sensor; 4. a pressure sensor; 5. a remote controller; 6. a GPS locator; 7. a power supply selection switch; 8. and fixing the bracket.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 2, a control device of a liquid discharge pump 1 on a transport vehicle according to the present application is shown, including: the temperature sensor 3 is arranged on the pump head of the liquid unloading pump 1; a remote controller 54 provided on the output end of the liquid discharge pump 1; a GPS positioner 6 arranged in a valve box of the transport vehicle; the pump control box 2 is arranged in the valve box, an indicator lamp is arranged on the outer wall of the pump control box 2, a PLC (programmable logic controller) is arranged in the pump control box 2, and the PLC is electrically connected with the indicator lamp; wherein, the PLC controller in the pump control box 2 is also electrically connected with the temperature sensor 3, the remote controller 54 and the GPS positioner 6 respectively.

The technical scheme of this embodiment is used, the temperature sensor 3 arranged on the pump head of the liquid unloading pump 1 can detect the temperature value of the liquid unloading pump 1 in real time, and transmit the detected temperature value to the PLC controller of the pump control box 2, judge whether the real-time detected temperature value is not greater than the preset temperature value through the PLC controller, and express through the display mode of the control indicator lamp, thereby realizing the purpose of intuitively judging whether the precooling is in place, and the remote controller 54 can detect the low-pressure phenomenon of the liquid unloading pump 1, and stop the pump protection, the GPS positioner 6 is arranged in the valve box of the transport vehicle, the position information of the current transport vehicle is obtained through the GPS positioner 6 in real time and is transmitted to the PLC controller of the pump control box 2, so that the tank car with the liquid unloading pump 1 can only start the liquid unloading pump 1 to unload liquid at the appointed liquid unloading place.

In some optional embodiments, the control device further comprises a remote controller connected to the pump control box 2 by a cable. Like this, through setting up remote control ware, can be convenient for on-the-spot operating personnel remote control to send the PLC controller in reset signal to pump control box 2 through remote control ware in the time quantum of predetermineeing, whether can real-time supervision operating personnel is on the scene when unloading pump 1 operation, thereby reduce because operating personnel leaves temporarily, controlling means automatic operation produces the phenomenon emergence of damage to unloading pump 1.

In some alternative embodiments, the pump control box 2 is mounted on the inner wall of the valve box by a fixed bracket 8. Thus, the stability of mounting the pump control box 2 can be improved.

The control method of the vehicle-mounted liquid unloading pump 1 of the transport vehicle comprises the following steps: the method comprises the steps that position information of a current transport vehicle is obtained in real time based on a GPS (global positioning system) positioner 6, and whether the current transport vehicle is in a preset fixed point liquid discharging area or not is judged through a PLC (programmable logic controller); if the current transport vehicle is in a preset fixed-point liquid unloading area, the PLC controller controls the liquid unloading pump 1 to carry out precooling treatment; acquiring the current temperature information of the liquid unloading pump 1 in real time based on a temperature sensor 3, and judging whether the current temperature value of the liquid unloading pump 1 is not greater than a preset threshold value or not through a PLC (programmable logic controller); if the current temperature value of the liquid unloading pump 1 is not greater than a preset threshold value, the PLC controller controls the liquid unloading pump 1 to operate, wherein the operation of the liquid unloading pump 1 comprises motor star operation and motor angle operation; the pressure value of the output end of the liquid unloading pump 1 is obtained in real time based on the remote controller 54, and whether the pressure value of the output end of the liquid unloading pump 1 is lower than a preset pressure value at present is judged through the PLC; and if the pressure value of the output end of the current liquid unloading pump 1 is lower than the preset pressure value, the PLC controller controls the liquid unloading pump 1 to stop running.

According to the method, the temperature value of the liquid unloading pump 1 is detected in real time through the temperature sensor 3, the pressure value of the output end of the liquid unloading pump 1 during working is detected in real time through the remote controller 54, automatic protection can be achieved under the bad condition of the liquid unloading pump 1, the position information of the current transport vehicle is obtained in real time through the GPS positioner 6 and is transmitted to the PLC of the pump control box 2, so that the tank car with the liquid unloading pump 1 only unloads liquid in a specified place, and the safety of the liquid in the transport vehicle can be improved.

In some optional embodiments, the method further comprises: when the liquid unloading pump 1 runs, detecting whether a reset signal exists within a preset time threshold; and if no reset signal is detected within a preset time threshold, controlling the liquid unloading pump 1 to stop running.

In one embodiment, referring to fig. 3, the control process of the truck-mounted liquid discharge pump 1 is as follows:

1) within the range of discharging the low-temperature liquid transport vehicle at a stopping fixed point, the pump control box 2 is connected to the commercial power of the rated voltage of the corresponding pump or connected to the vehicle-mounted generator, the power selection switch 7 is arranged on the pump control box 2, and the switch is turned to the corresponding commercial power or the vehicle-mounted power generation position.

2) After the pump control box 2 is powered on, a power indicator lamp on the cabinet door is turned on; the temperature control meter is electrified, the first line displays the real-time temperature, and the second line displays the set value; the over-temperature indicator lights up and the GPS indicator lights up (within the liquid discharge range).

3) The motor on the door of the pump control box 2 is overheated, and the motor overload indicator lamp is in a normally off state; the screen of the pump control box 2 firstly displays the word "cooling the pump first when the temperature is too high".

4) And precooling the liquid unloading pump 1, and when the real-time temperature value displayed by the temperature control meter is lower than a set value (initially set to 120 ℃), turning off the over-temperature indicator lamp, completing the cold pump, and keeping the motor in a state to be started.

5) And when a 'starting' button is pressed, a motor operation indicator lamp is turned on, the KM1 and the KM4 contactors are attracted, the motor operates in a star mode, meanwhile, a valve is manually operated, after 8 seconds, the KM4 is disconnected, the KM3 is attracted, the motor operates in an angle mode, and the motor reaches the rated rotating speed and the rated torque. Meanwhile, the accumulation timer starts to time, the ammeter displays a real-time current value, and the running state of the motor can be judged according to the current.

6) After the motor operates for 25 seconds, if the pump outlet pressure is greater than 1.2MPa, the pump continues to operate; if the pump outlet pressure is less than 1.2MPa, the pump is automatically stopped, the buzzer buzzes continuously, the motor stops running as cavitation protection, and the stop button is pressed to reset.

7) When no reset signal is input every 3 minutes of operation of the liquid unloading pump 1, an alarm is given through the buzzer, and at the moment, a field operator needs to press a 'start' button to carry out reset operation, so that the alarm is eliminated and the work is continued. Otherwise, the system will automatically stop the pump after the buzzer alarms for one minute.

8) And stopping the liquid discharging pump 1, pressing a stop button to stop supplying power to the pump motor, and stopping the operation of the liquid discharging pump 1.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.