CN2293056Y - Adjustable resistance type liquid level sensor - Google Patents
Adjustable resistance type liquid level sensor Download PDFInfo
- Publication number
- CN2293056Y CN2293056Y CN 96245444 CN96245444U CN2293056Y CN 2293056 Y CN2293056 Y CN 2293056Y CN 96245444 CN96245444 CN 96245444 CN 96245444 U CN96245444 U CN 96245444U CN 2293056 Y CN2293056 Y CN 2293056Y
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- CN
- China
- Prior art keywords
- metal wire
- resistor
- resistive conductor
- float
- electrically connected
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- Expired - Fee Related
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- Level Indicators Using A Float (AREA)
Abstract
The utility model relates to an adjustable resistance type liquid level sensor. A resistor 1 takes a metal wire with an insulated appearance as a framework, two metal wires 6 with insulated surfaces and two resistance wires 7, 8 are distributed at intervals and are wound on the framework. A float 3 is sheathed on the resistor, one end of the float is fixed with an electric brush 2 which can slide on the resistor, and the electric brush is electrically connected with the resistance wires 7, 8 in a contact type. The upper and the lower ends of the framework 5 are respectively fixed between the top and the bottom of a protecting tube 4, the lower end of the protecting tube is provided with a liquid inlet and outlet hole 9, and the upper end is provided with a gas inlet and outlet hole 10. The utility model has the advantages of simple structure, good repeatability, low cost and high precision. The error can reach one in a thousand.
Description
Adjustable resistance formula liquid level sensor belongs to liquid level emasuring device.
The existing every precision of liquid level sensor is high, and its price is all than higher, and lower its precision of price is also low.
The purpose of this utility model is the development adjustable resistance formula liquid level sensor that a kind of price is low, precision is high.
The utility model is made up of resistor, brush, float, protection tube.Resistor is done skeleton by the metal wire of an outside surface insulation, is wound with metal wire and two resistive conductors of two surface insulations arranging the space on its outer surface.Float is enclosed within on the resistor, and the fixedly connected brush of an end of float slidably, and realizes that with resistive conductor contact is electrically connected between brush and the resistor.Resistor, brush, float are formed variohm, and the skeleton in the resistor is between two ends are separately fixed on the protection tube top and go to the bottom up and down, and there is a hole that passes in and out liquid the lower end of protection tube, and there is the hole of an input and output gas upper end of protection tube.The lower end of a following resistive conductor is electrically connected with the metal wire of two surface insulations, and common port is made in the upper end of the metal wire of surface insulation, promptly is ground, and power end is done in the upper end of this root resistive conductor.The lower end of another root resistive conductor is unsettled, and signal output part is done in its upper end, is electrically connected by brush between two resistive conductors.
The utlity model has simple in structure, good reproducibility, low, the advantage of high precision of cost.Its error can reach per mille, and it can be used for the measurement of various liquid levels.
Fig. 1 is the utility model one-piece construction synoptic diagram, and Fig. 2 is the structural representation of resistor among the embodiment one, and Fig. 3 is the structural representation of resistor among the embodiment two, and Fig. 4 is the structural representation of resistor among the embodiment three, and Fig. 5 is the electrical schematic diagram of variohm.
Embodiment one: present embodiment is made up of resistor 1, brush 2, float 3, protection tube 4.Resistor is made skeleton by the metal wire 5 of an outside surface insulation, is wound with metal wire 6 and two resistive conductors 7,8 of two surface insulations of space distribution on metal wire 5.Float 3 is enclosed within on the resistor 1, the fixedly connected brush 2 of an end of float 3, and brush 2 can slide on resistor with float, and realizes that with resistive conductor 7,8 contact is electrically connected.The lower end that is in the resistive conductor 7 of skeleton 5 bottoms is electrically connected with the lower end of two surface insulation metal wires 6, the upper end ground connection of metal wire 6, the last termination power of resistive conductor 7.The lower end of another root resistive conductor 8 is unsettled, and signal output part is done in its upper end.Resistor 1, brush 2, float 3 are formed variohm.The two ends up and down of skeleton 5 are separately fixed between the going up the top and going to the bottom of protection tube 4 in the resistor 1.There is the hole 9 of a turnover liquid lower end of protection tube 4, and there is the hole 10 of an input and output gas upper end of protection tube 4.During use protection tube is placed in the fluid to be measured, float is in the liquid level place, and by the electrical connection of brush, the partial pressure value that is about to this place spreads out of, and this signal is after amplifying, and machine is handled as calculated again, can obtain accurate liquid level.
Embodiment two: the difference of present embodiment and embodiment one is the syndeton of resistor 1, and the lower end that is in the resistive conductor 7 of skeleton 5 bottoms is electrically connected the upper end ground connection of metal wire 5 with the lower end of metal wire 5.All be not electrically connected between the metal wire 6 of two surface insulations and resistive conductor 7,8 and the metal wire 5.Other composition and annexation are identical with embodiment one.
Embodiment three: the difference of present embodiment and embodiment two is the structure of resistor 1.The resistor 1 of present embodiment is made up of the metal wire 5 of surface insulation, the resistive conductor 12,13 of two surface portion insulation, equably around the metal wire 5 of surface insulation on, conduct electricity side by side by the part that resistive conductor 12,13 exposes outside surperficial 11 places for the resistive conductor 13,12 of two surface portions insulation.The lower end that is in the resistive conductor 13 of skeleton 5 bottoms is electrically connected with the lower end of metal wire 5, and the upper end of resistive conductor 13 connects power end, and the lower end of another root resistive conductor 12 is unsettled, and signal output part is done in its upper end.Brush 2 realizes that with the current-carrying part of the resistive conductor 13,12 of surface portion insulation contact is electrically connected.Other composition is identical with embodiment two with annexation.
Claims (3)
1, adjustable resistance formula liquid level sensor, it is made up of resistor (1), brush (2), float (3), protection tube (4), it is characterized in that resistor (1) makes skeleton by the metal wire (5) of appearance insulation, on metal wire (5), be wound with the metal wire (6) of two surface insulations that the space distributes and two resistive conductors (7), (8); Float (3) is enclosed within on the resistor (1), the fixedly connected brush of an end of float (3) (2), and brush (2) can slide on resistor with float, and realizes that with resistive conductor (7), (8) contact is electrically connected; The lower end that is in the resistive conductor (7) of skeleton (5) bottom is electrically connected with the lower end of the metal wire (6) of two surface insulations, the upper end ground connection of metal wire (6), the last termination power end of resistive conductor (7), the lower end of another root resistive conductor (8) is unsettled, and signal output part is done in its upper end; Resistor (1), brush (2), float (3) are formed variohm, and the skeleton (5) in the resistor (1) two ends up and down is separately fixed between the going up the top and going to the bottom of protection tube (4); There is the hole (9) of a turnover liquid lower end of protection tube (4), and there is the hole (10) of an input and output gas upper end of protection tube (4).
2, adjustable resistance formula liquid level sensor according to claim 1, the syndeton that it is characterized in that resistor (1), the lower end that is in the resistive conductor (7) of skeleton (5) bottom is electrically connected with the lower end of metal wire (5), all be not electrically connected between the upper end ground connection of metal wire (5), the metal wire of two surface insulations (6) and resistive conductor (7), (8) and metal wire (5).
3, adjustable resistance formula liquid level sensor according to claim 1, the structure that it is characterized in that resistor (1), resistor (1) is by the metal wire (5) of surface insulation, the resistive conductor (13) of two surface portion insulation, (12) form, the resistive conductor (13) of two surface portion insulation, (12) side by side equably on the metal wire (5) of surface insulation, resistive conductor (13), (12) part that surface (11) locates that exposes outside is conducted electricity, the lower end that is in the resistive conductor (13) of skeleton (5) bottom is electrically connected with the lower end of metal wire (5), the upper end of resistive conductor (13) connects power end, the lower end of another root resistive conductor (12) is unsettled, signal output part is done in its upper end, the resistive conductor (13) of brush (2) and surface portion insulation, (12) current-carrying part realizes that contact is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245444 CN2293056Y (en) | 1996-10-31 | 1996-10-31 | Adjustable resistance type liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245444 CN2293056Y (en) | 1996-10-31 | 1996-10-31 | Adjustable resistance type liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293056Y true CN2293056Y (en) | 1998-09-30 |
Family
ID=33918498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245444 Expired - Fee Related CN2293056Y (en) | 1996-10-31 | 1996-10-31 | Adjustable resistance type liquid level sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293056Y (en) |
-
1996
- 1996-10-31 CN CN 96245444 patent/CN2293056Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: SERVICE CO., HARBIN FORESTRY MACHINERY FACTORY TO: HARBIN CITY FUYUAN COMPUTATIONAL OIL REFUELING EQUIPMENT FACTORY |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Harbin Fuyuan computer oiling equipment factory Patentee before: Service Co., Harbin Forestry Machinery Factory |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |