CN209814328U - Liquid level monitoring system for tank type refueling truck of airplane - Google Patents
Liquid level monitoring system for tank type refueling truck of airplane Download PDFInfo
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- CN209814328U CN209814328U CN201920461234.4U CN201920461234U CN209814328U CN 209814328 U CN209814328 U CN 209814328U CN 201920461234 U CN201920461234 U CN 201920461234U CN 209814328 U CN209814328 U CN 209814328U
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Abstract
The utility model discloses a liquid level monitoring system for an aircraft tank refueling truck, which comprises an oil tank, a carriage body, a refueling solenoid valve, an oil charging solenoid valve and an oil pumping solenoid valve; the liquid level monitoring system comprises a capacitive liquid level meter, an isolated safety barrier, an analog-to-digital converter, a controller and an alarm, wherein a probe of the capacitive liquid level meter is arranged in an oil tank, the capacitive liquid level meter is connected with the isolated safety barrier through a signal line, the isolated safety barrier is connected with the analog-to-digital converter through a signal line, the analog-to-digital converter is connected with the controller through a signal line, and the controller is in signal connection with an oil filling electromagnetic valve, an oil pumping electromagnetic valve and the alarm respectively. The utility model discloses can not only realize accurate control and the timely early warning to height, low liquid level, guarantee the security of refueling and oil charging, can realize remote monitoring and visual display moreover to have advantages such as simple structure, reliability height, practicality are strong.
Description
Technical Field
The utility model relates to a liquid level monitoring system specifically says so, relates to a liquid level monitoring system for aircraft tank truck belongs to electron control technical field.
Background
The tank type tank fuelling vehicle for aircraft is one of the important special ground vehicles for maintaining normal operation in airport, is responsible for fuelling civil aircraft with oil and pumping oil, and is mainly composed of chassis, frame, oil pumping system, pneumatic control system, hydraulic control system, electric system, oil tank and carriage body. When oil is pumped from an oil tank to fill fuel oil for an airplane, in order to avoid the occurrence of idle damage and other dangerous situations of the oil pump caused by too low oil amount in the oil tank, monitoring and early warning are needed to be carried out on low liquid level in the oil tank; when oil is pumped into the oil tank from the airplane or filled into the oil tank, the high liquid level in the oil tank needs to be monitored and early warned in order to avoid the overflow of the oil. At present, the following modes are mainly adopted for monitoring the liquid level in an oil tank of an aircraft tank type refueling truck:
1) using buoyancy type level gauges
The buoyancy type liquid level meter is designed according to the Archimedes buoyancy principle and mainly comprises a frame part, a transmission rod and a buoy. The two ends of the transmission rod are respectively connected with the frame part and the buoy. When the liquid level changes, the transmission rod takes the frame part as a fulcrum and swings up and down along with the buoy in a sector manner.
However, most of the existing buoyancy-type liquid level meters are direct-reading and visual, can not be networked with a computer, can not simulate digital display, and are difficult to realize remote monitoring; meanwhile, in actual operation, the buoyancy type liquid level meter still has the problem of clamping stagnation.
2) Using high and low level valves
The high and low liquid level valves control the transposition of the pneumatic valve core by utilizing the change of the floating ball along with the liquid level, thereby realizing automatic control. The control form has complex structure, more accessories and higher cost; in particular, when working in a low temperature environment, it is easy to cause the high and low level valves to be frozen and not work.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem to prior art exists, the utility model aims at providing a liquid level monitoring system for aircraft tank refueller of simple structure, can gather liquid level information in the oil tank in real time and can realize intelligent monitoring.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a liquid level monitoring system for an aircraft tank fuelling vehicle comprises an oil tank, a compartment body, a fuelling electromagnetic valve, an oil loading electromagnetic valve and an oil pumping electromagnetic valve; the liquid level monitoring system comprises a capacitive liquid level meter, an isolated safety barrier, an analog-to-digital converter, a controller and an alarm, wherein a probe of the capacitive liquid level meter is arranged in an oil tank, the capacitive liquid level meter is connected with the isolated safety barrier through a signal line, the isolated safety barrier is connected with the analog-to-digital converter through a signal line, the analog-to-digital converter is connected with the controller through a signal line, and the controller is in signal connection with an oil filling electromagnetic valve, an oil pumping electromagnetic valve and the alarm respectively.
According to a preferable scheme, the liquid level monitoring system further comprises a liquid crystal display screen, and the liquid crystal display screen is in signal connection with the controller and is embedded on the side face of the carriage body.
In a preferable scheme, the capacitance type liquid level meter is an FMI51 series capacitance type liquid level meter.
According to a preferable scheme, the isolated safety barrier is an analog input isolated safety barrier.
In a preferred scheme, the controller is a PLC controller or a single chip microcomputer.
In a further preferred embodiment, the controller includes a wireless network communication module.
According to a preferable scheme, the alarm is an audible and visual alarm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model utilizes the capacitance type liquid level meter to collect the liquid level in real time, thereby not only avoiding the clamping stagnation problem which is easy to appear on the buoyancy type liquid level meter and the problem that the high and low liquid level valves are easy to be frozen and can not work under the low temperature environment, but also realizing the accurate control and the timely early warning on the high liquid level and the low liquid level, and ensuring the safety of oil filling and oil charging; in addition, remote monitoring and visual display can be realized; moreover, the utility model also has the advantages of simple structure, high reliability, strong practicability and the like, and is suitable for liquid level monitoring of various airplane tank-type refueling trucks; therefore, compared with the prior art, the utility model has industrial practical value and progressiveness.
Drawings
FIG. 1 is a schematic structural diagram of a liquid level monitoring system for an aircraft tank fuelling vehicle according to an embodiment.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
Examples
Referring to fig. 1, the liquid level monitoring system for an aircraft tank fuelling vehicle according to the present embodiment includes a capacitive liquid level meter 1, an isolated safety barrier 2, an analog-to-digital converter 3, a controller 4 and an alarm 5, where the aircraft tank fuelling vehicle includes an oil tank, a compartment (not shown in the figure, but not shown in the prior art), an oil filling solenoid valve 6, an oil filling solenoid valve 7 and an oil pumping solenoid valve 8. The probe of the capacitive liquid level meter 1 is arranged in an oil tank, the capacitive liquid level meter 1 is connected with an isolated safety barrier 2 through a signal line, the isolated safety barrier 2 is connected with an analog-to-digital converter 3 through a signal line, the analog-to-digital converter 3 is connected with a controller 4 through a signal line, and the controller 4 is in signal connection with an alarm 5, an oil filling electromagnetic valve 6, an oil filling electromagnetic valve 7 and an oil pumping electromagnetic valve 8 respectively.
The utility model discloses an adopt capacitanc level gauge 1 directly to convert the change of medium liquid level in the oil tank into the change of electric capacity, convert standard current signal into again and carry to isolated safety barrier 2, then carry to adc 3 by isolated safety barrier 2, carry to controller 4 after adc 3 converts analog signal into digital signal, controller 4 carries out the comparison respectively through the digital signal of receiving and predetermined high liquid level threshold value and low liquid level threshold value; if the value is larger than the high liquid level threshold value, a closing signal is sent to an oil filling electromagnetic valve 7 (when the airplane tank refueling truck is in oil filling operation) or an oil pumping electromagnetic valve 8 (when the airplane tank refueling truck is in oil pumping operation), and an alarm 5 is started to send a warning signal; if the liquid level is lower than the low liquid level threshold value, a closing signal is sent to the refueling electromagnetic valve 6 (when the tank type aircraft refueling truck is in refueling operation), and meanwhile, the alarm 5 is started to send a warning signal.
When liquid level monitoring system still includes liquid crystal display 9, makes liquid crystal display 9 and 4 signal connection of controller just inlay on the side of the railway carriage or compartment body, can make the liquid level information that the controller will gather with digital form visual display on liquid crystal display 9, make the liquid level information in the oil tank of the accurate understanding directly perceived at any time of operating personnel, it is very convenient and practical.
The capacitance type liquid level meter 1 is preferably a capacitance type liquid level meter of FMI51 series, and the capacitance type liquid level meter of the series has an integrated intelligent transmitter, can realize continuous measurement and has an explosion-proof function.
The isolation type safety barrier 2 preferably selects analog quantity input isolation type safety barrier, can provide isolation power supply for a transmitter of the capacitance type liquid level meter 1 in a dangerous area, transmits a current signal of the transmitter to a safety side from a dangerous side in an isolation mode, can be suitable for dangerous environment, has an explosion-proof function, and has the working environment temperature range of-20-60 ℃, and strong practicability.
The controller 4 can be a PLC controller or a single chip microcomputer, and preferably includes a wireless network module 41, so as to facilitate remote monitoring.
The alarm 5 is preferably an audible and visual alarm, so that the warning effect is obvious.
In summary, it can be seen that: the utility model utilizes the capacitance type liquid level meter to collect the liquid level in real time, thereby not only avoiding the clamping stagnation problem which is easy to appear on the buoyancy type liquid level meter and the problem that the high and low liquid level valves are easy to be frozen and can not work under the low temperature environment, but also realizing the accurate control and the timely early warning on the high liquid level and the low liquid level, and ensuring the safety of oil filling and oil charging; in addition, remote monitoring and visual display can be realized; moreover, the utility model also has the advantages of simple structure, high reliability, strong practicability and the like, and is suitable for liquid level monitoring of various airplane tank-type refueling trucks; therefore, compared with the prior art, the utility model has industrial practical value and progressiveness.
It is finally necessary to point out here: the above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. A liquid level monitoring system for an aircraft tank fuelling vehicle comprises an oil tank, a compartment body, a fuelling electromagnetic valve, an oil loading electromagnetic valve and an oil pumping electromagnetic valve; the method is characterized in that: the liquid level monitoring system comprises a capacitive liquid level meter, an isolated safety barrier, an analog-to-digital converter, a controller and an alarm, wherein a probe of the capacitive liquid level meter is arranged in an oil tank, the capacitive liquid level meter is connected with the isolated safety barrier through a signal line, the isolated safety barrier is connected with the analog-to-digital converter through a signal line, the analog-to-digital converter is connected with the controller through a signal line, and the controller is in signal connection with an oil filling electromagnetic valve, an oil pumping electromagnetic valve and the alarm respectively.
2. The liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 1 wherein: the liquid level monitoring system also comprises a liquid crystal display screen which is in signal connection with the controller and is embedded on the side surface of the carriage body.
3. The liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 1 wherein: the capacitance type liquid level meter is an FMI51 series capacitance type liquid level meter.
4. The liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 1 wherein: the isolated safety barrier is an analog input isolated safety barrier.
5. The liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 1 wherein: the controller is a PLC controller or a single chip microcomputer.
6. A liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 5 wherein: the controller contains a wireless network communication module.
7. The liquid level monitoring system for an aircraft tank fuelling vehicle as claimed in claim 1 wherein: and the alarm is an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920461234.4U CN209814328U (en) | 2019-04-08 | 2019-04-08 | Liquid level monitoring system for tank type refueling truck of airplane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920461234.4U CN209814328U (en) | 2019-04-08 | 2019-04-08 | Liquid level monitoring system for tank type refueling truck of airplane |
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| CN209814328U true CN209814328U (en) | 2019-12-20 |
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| CN201920461234.4U Active CN209814328U (en) | 2019-04-08 | 2019-04-08 | Liquid level monitoring system for tank type refueling truck of airplane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112561372A (en) * | 2020-12-23 | 2021-03-26 | 中国石化销售股份有限公司天津石油分公司 | Finished oil transportation management system |
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2019
- 2019-04-08 CN CN201920461234.4U patent/CN209814328U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112561372A (en) * | 2020-12-23 | 2021-03-26 | 中国石化销售股份有限公司天津石油分公司 | Finished oil transportation management system |
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