CN2192029Y

CN2192029Y - Device for measuring storage fuel contents in oil cylinder

Info

Publication number: CN2192029Y
Application number: CN 94226608
Authority: CN
Inventors: 庞世修
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-13
Filing date: 1994-01-13
Publication date: 1995-03-15
Anticipated expiration: 2004-01-13

Abstract

The utility model relates to a device for measuring storage oil contents in an oil cylinder, which is composed of an oil level sensor and a sensing signal processing device, wherein, the oil level sensor is composed of conducting liquid positioned at the bottom of the measuring oil content, a conductor tube whose one end is inserted into the conducting liquid, and a liquid level sensor which is placed in the conductor tube and is inserted into the conducting liquid at one end. The measurement of the oil level is converted to the measurement of the liquid level of the conducting liquid. The conducting liquid preferentially adopts water loaded in a thin-walled container; the water in the thin-walled container is isolated from the measuring oil.

Description

Device for measuring storage fuel contents in oil cylinder

The utility model relates to the measuring technique of non-electrically conductive liquid amount (or liquid level), especially the measuring technique of oil tank trapped fuel amount.

Chinese invention patent application " vertical distribution of liquid and liquid level are measured in the oil tank method and surveying instrument " discloses a kind of measuring method of oil tank trapped fuel amount in (publication number CN1057435A, open day on January 1st, 92).It utilizes two pressure transducer composition density sensors of certain distance up and down, inserts tank bottom, measures vertical distribution of oil tank section liquid (density) and liquid level, obtains the trapped fuel amount.It is applicable to oil, water, sand mixture, is mainly used in oil (crude oil) industry.If measure pure oil, for example adorn the oil mass in gasoline, the diesel oil oil tank, then said method seems cumbersome.

The purpose of this utility model is to provide a kind of storage simply and easily to adorn the measurement mechanism of the oil tank trapped fuel amount of pure oil, for example refuelling station's (gasoline, diesel oil etc.) oil tank trapped fuel amount.Certainly, this measurement mechanism also can be expanded the measurement that is used for other non-electrically conductive liquid liquid storage amounts.

The utility model is made of fuel level sensor and transducing signal treating apparatus.Fuel level sensor is by the conducting liquid that places oil mass to be measured bottom, vertically insert in the conductor tube of this conducting liquid and place within this conductor tube and liquid level sensor that an end inserts in said conducting liquid constitutes.

Said conducting liquid places a thin-walled pressure vessel, and said conductor tube inserts in the conducting liquid in this thin-walled pressure vessel, seals between the vessel port of thin-walled pressure vessel and the conductor tube tube wall.So; the conducting liquid in the thin-walled pressure vessel and oil to be measured (non-electrically conductive liquid) are realized isolating; the oil pressure of trapped fuel amount is added on the thin-walled of thin-walled pressure vessel in the oil tank; the conducting liquid in the thin-walled pressure vessel is pressed in the conductor tube; when in the oil tank during trapped fuel quantitative change; oil pressure changes, the liquid level generation respective change of conducting liquid in the conductor tube.Device has liquid level sensor in the conductor tube, and the one end inserts in the conducting liquid.This liquid level sensor is made of the tinsel that the surface has dielectric film, when the one end inserts in the conducting liquid, constitutes a capacitor between tinsel and the conductor tube tube wall.Conducting liquid in the conductor tube conducts electricity, so the medium in the above-mentioned capacitor is the dielectric film of wire surface, because this dielectric film is very thin, so electric capacity is very big.The other end of tinsel and conductor tube connects the input end of transducing signal treating apparatus respectively, wherein the conductor tube earthing potential.So, when oil tank trapped fuel amount changes, the thin-walled by above-mentioned thin-walled pressure vessel carries out the pressure transmission, conducting liquid level respective change in the conductor tube, above-mentioned condenser capacity respective change is handled and calculation element by transducing signal (electric capacity), promptly can measure the dynamic value of trapped fuel amount.

Another liquid level sensor of the above-mentioned liquid level sensor effect of calibration can also be housed in above-mentioned conductor, and its structure and method of attachment are identical with above-mentioned liquid level sensor, and its difference is that the tinsel that constitutes sensor has definite standard length.

This measurement mechanism is by measuring the variation of conducting liquid level, measure the variation of corresponding trapped fuel gauging position, measure corresponding trapped fuel amount, the conversion of its transducing signal and electric treatment can be adopted microcomputer and print system, method is ingenious, and measurement mechanism is simple in structure, measures rapidly, and have calibrating sensors, fully guarantee measuring accuracy.If unit temp sensor in the conducting liquid in conductor tube can also be measured the temperature of trapped fuel amount.

Fig. 1 is the structural drawing of fuel level sensor in the utility model;

Fig. 2 is a sensor signal treating apparatus synoptic diagram in the utility model

Provide embodiment below in conjunction with accompanying drawing

See Fig. 1, (1) is conductor tube, can select for use the corrosion-resistant conductor material of oil resistant to make, as stainless steel etc.; (2), (9) be the conducting liquid level sensor, its most handy rare metal silk is made; (3) be temperature sensor; (4) be liquid level sensor insulation hold-down bars; (5) be at the bottom of the oil tank; (6) be conducting liquid, preferably water; (8) be thin-walled pressure vessel, can be with metal or nonmetal thin-walled, require non-leakagely, present embodiment is selected the oil resistant plastics film production for use; (7) be the protective sleeve of thin-walled pressure vessel (8), have oil-through hole above; (10) be the insulated conductor of calibration solution level sensor; (11) be the conducting liquid liquid level; (12) be the trapped fuel amount; (13) be the oil tank upper wall; (14) be the oil tank mouth; (15) be the air hole of conductor tube (1); (16) be polycore cable; (17) be fluid sealant, available epoxy etc.; (18) be the insulated enclosure fixed head.

Air hole (15) is in the below of insulated enclosure plate (18), and this fuel level sensor total length should guarantee that the position of air hole (15) is higher than the height of oil tank jar mouth (14).Fuel level sensor (5) at the bottom of oil tank mouth (14) the straight cutting jar.

See Fig. 2, among the figure 1 ... n represents the fuel level sensor that n is only identical, inserts n oil tank respectively.The transducing signal output terminal of each sensor is respectively a, b, c, d end, inserts in corresponding signaling conversion circuit (transducing signal converts electric signal to) and the amplifying circuit, by signal Processing and control device, shows or prints the trapped fuel amount.In a, b, c, the d end calibration terminal is arranged, an earth terminal, all the other are measuring junction, the input conversion of each termination is by switch K1 ... Kn control.A said n fuel level sensor can only be handled by a cover transducing signal conversion processing unit, realizes the touring detection of n oil tank trapped fuel amount.

Claims

1, oil tank trapped fuel measuring device, constitute by fuel level sensor and transducing signal treating apparatus, it is characterized in that said fuel level sensor by the conducting liquid (6) that places oil mass to be measured bottom, an end inserts in the conductor tube (1) in the conducting liquid (6) and places within the conductor tube (1) and liquid level sensor (2) that an end inserts in conducting liquid (6) constitutes.

2, by the described measurement mechanism of claim 1, it is characterized in that said conducting liquid (6) places a thin-walled pressure vessel (8), conductor tube (1) inserts in the conducting liquid in the container (8), seals between the vessel port of container (8) and the conductor tube tube wall.

3, by claim 1,2 said measurement mechanisms, it is characterized in that said liquid level sensor (2) is made of the tinsel that the surface has dielectric film, one end places the conductive liquid (6) of container (8), the input end of another termination transducing signal treating apparatus.

4, by claim 1,2 said measurement mechanisms, it is characterized in that being equipped with in the said conductor tube (1) liquid level sensor (9) of calibration solution level sensor (2) effect, it has tinsel dielectric film and that have standard length by the surface and constitutes, level sensor (9) one ends place the conducting liquid (6) of container (8), the input end of another termination transducing signal treating apparatus.

5, by claim 1,2 said measurement mechanisms, said conducting liquid (6) is a water.