CN2060772U

CN2060772U - Supplying fuel machine cotrolled by computer

Info

Publication number: CN2060772U
Application number: CN 89203049
Authority: CN
Inventors: 马伯云
Original assignee: Tonghua Storage And Transportation Technology Development And Promotion Station Of Jilin Petroleum Co
Current assignee: Tonghua Storage And Transportation Technology Development And Promotion Station Of Jilin Petroleum Co
Priority date: 1989-03-15
Filing date: 1989-03-15
Publication date: 1990-08-22

Abstract

The utility model discloses a computer fuel supplying machine which combines electronic technology and mechanical technology into a whole and is designed according to the explosion-proof design requirements of GB 3836.4-83, 38361-83. A mode that a host machine controls two fuel supplying machines and two fuel supplying guns is adopted. The fuel supplying guns are provided with a self-sealing mechanism. Flow compensation technique is applied, making metering accuracy largely enhanced. A unique power-down data protection circuit is adopted. The utility model has multiple functions of presetting, display, self sealing, management, etc. and is used for supplying the fuel for vehicles and filling the liquid.

Description

Supplying fuel machine cotrolled by computer

The utility model discloses a kind of computer control fuel charger that is used for aspects such as automobile fuel filler, filling liquid, particularly a kind of have preset, the computer fuel charger of management function.

At present, the fuel charger that each petrol service station is used all is that mechanical type shows fuel charger automatically, and its principle of work of this fuel charger is the work such as metering, counting, demonstration of finishing by mechanical movement.The unit of display of this fuel charger is a litre, and is different with the measure unit kilogram that we use at present, needs to convert.Again because of oil pump, measure, be shown as one, the structure more complicated, mechanical wear is bigger, fault rate is higher.So, to consider that when mounted reading and occupation of land etc. are more multifactor, install, use inconvenience to some extent.

In sum, the user presses for has bigger improved fuel charger of new generation to come out on performance.

The purpose of this utility model is to overcome the shortcoming of above-mentioned fuel charger, and electronic computer technology and mechanical technique are organically integrated, and designs by the explosion-proof designing requirement of GB3836.4-83.38361-83 to have control, manages multi-functional computer fuel charger.

The utility model is finished in the following manner: with 8031 monolithics is that the main frame that core constitutes is controlled two oil-suckers by cable.The inlet of oil-sucker links to each other with the oil tank of oil depot by pipeline, and the outlet of oil-sucker connects nozzle by flexible pipe, in the gun barrel of nozzle float is installed, and is furnished with telltale and supervisory keyboard on the body of a gun.During oiling, send instruction by main frame and start oil-sucker, the volume of the liquid that the oil-sucker flow gauge records is converted by density value by main frame, and the unit of gained is a kilogram, shows on main frame and nozzle.Supervisory keyboard can preset the oil product weight of paying, and presets number back auto-stops reaching.If the oil of being paid, container can not load, thereby the float of oiling gun barrel make the oil-sucker shutdown prevent that fluid from overflowing can for signal of main frame.

The utility model has solved control preferably because Eltec and mechanical technique are combined together.Metering.Problems such as management.So simple in structure easy to use, when the example structure that will be described in detail below adopting, cost is compared fair or lower slightly with common fuel charger.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is a structural representation of the present utility model.

Fig. 2, Fig. 5 are the utility model host circuit figure.

Fig. 3 is the circuit diagram on the utility model nozzle.

Fig. 4 is a power circuit diagram of the present utility model.(intrinsically safe circuit.）

With reference to Fig. 1, one is equipped with 8031 monolithics is core, the main frame 1 of being furnished with keyboard, demonstration and chopping machine 4, power lead 6 on power lead 5 on the main frame, two oil cans, the difference power connection, consider actual needs and cost, main frame 1 is controlled two oil cans 2 respectively by cable 7 and through nozzle 3 that transport pipe connect.Be equipped with on the nozzle 3 and preset keyboard and telltale, be provided with the float that prevents to add the φ 5 * 10 that overflows in the gun barrel, the very strong rare worker's SmCo magnet steel of magnetic force is arranged on the float; when oil level surpasses this float; float floats and drives magnet steel and floats, and the adhesive dry-reed tube produces a shutdown signal and gives main frame.

With reference to Fig. 2, Fig. 5, host circuit figure.IC ₁Be 8031 monolithics; IC ₂It is the 74LS373 octal latch; IC ₃Be the read-only EPROM of 27324K; IC ₄The 2016th, 2K reads and writes RAM; IC ₅The 2817th, 2K wipes EPROM; IC ₆The 8155th, expansion interface; IC ₇74LS245 is eight bus drivers; IC8.IC10.IC11 is 1413 Darlington actuators; IC ₉74LS138 is 3～8 bit decoders.By above main element and generation 6M quartz crystal, piezoceramic and other attached main frame that helps element to constitute, the volume recording in the flow gauge converts by density value, and the unit of gained is a kilogram, and the unit of display also is a kilogram.

Precision during for the raising different flow is provided with equalizer circuit, and this circuit is asked correction according to the curve under the flow gauge different flow state, inserts among the EPROM then.When fuel charger was worked, the sampled signal of flow gauge entered main frame by middle fracture INT, and main frame can be measured flow according to twice interrupt interval, looked into the compensation meter that deposits among the EPROM and obtained corresponding offset data.Can improve precision greatly like this, make it (all reaching 0.1% precision in 0.6～6M) flow range.

With reference to presetting and display circuit figure on Fig. 3 nozzle.IC101～IC102 is that 74HC165 incorporates into and goes here and there out shift register among the figure; IC103～IC106 is the 74HC164 SI PO shift register; IC107～IC110 is the 74H174 octal latch.This circuit cooperates by button with main frame and pre-set factory is set, the adjustment program.By preset pay oil after, more once actual weight and pre-value then with the pre-set factory addition, obtain new pre-set factory under the basic unmodified situation of motor speed, the difference that can accomplish preset value and actual amount is below 0.01Kg; When if motor speed variation and other factors change, then follow the tracks of at any time and adjust, guarantee to preset accurately.

With reference to Fig. 4 intrinsicallysafecircuit figure.Among the figure, IC201～IC203 is a three terminal regulator.1.2 * 6 nickel-cadmium cells are done backup power, make switch by relay, after the start, the relay adhesive is connected circuit and nickel-cadmium cell.Power supply is to battery charge when cell pressure is lower than 8.5 volts; When voltage is equal to or higher than 8.5 volts, stop charging.In case power down; nickel-cadmium cell is directly powered to main frame; the ct-off signal that is produced by power down simultaneously makes complete machine enter the protected data program; all data that need protection are write among the EPROM2817; about during this period of time 5 seconds, after having write, disconnect relay and cut off being connected of nickel-cadmium cell and main frame; so just claimed data are all protected, after waiting to power on the content among the EPROM2817 read and get final product.

During operation, press the supervisory keyboard on the nozzle, preset the oil product weight number of paying, LED pipe on main frame and the nozzle is display data simultaneously---and behind 3 of integers and the arithmetic point one, unit is a kilogram, after the arrival of startup fuel charger is paid and preset weight, by the host computer control automatic train stop.

Claims

1, the computer fuel charger that is made of main frame 1, oil can 2, nozzle 3, chopping machine 4 is characterized in that: with 8031 monolithics is that the main frame of core is controlled oil pumper by cable, the inlet of oil-sucker links to each other with the oil tank of oil depot by pipeline, the outlet of oil-sucker connects nozzle by flexible pipe, be furnished with telltale and supervisory keyboard on the body of a gun, the quantity of refueling shows on main frame and oil gun.

2, computer fuel charger according to claim 1 is characterized in that: be provided with the float that prevents the φ 5 * 10 that overflows in nozzle 3 gun barrels; the very strong rare worker's SmCo magnet steel of magnetic force is arranged on the float; when oil level surpasses this float; float floats and drives magnet steel and floats; the adhesive dry-reed tube produces a shutdown signal and gives main frame.

3, computer fuel charger according to claim 1 is characterized in that equalizer circuit asks correction according to the curve under the different flow state, inserts then among the EPROM, makes it (all reaching 0.1% precision in 0.6～6M) flow range.

4, computer fuel charger according to claim 1; it is characterized in that three three terminal regulators of IC201～IC203 and 1.2 * 6 nickel-cadmium cells and annex constitute the intrinsicallysafecircuit road; do backup power; in case have a power failure; nickel-cadmium cell directly makes complete machine enter defence program to main frame power supply, and the data of required protection are write among the EPROM2817.