CN202793522U - Capacitance liquid level transmitter - Google Patents
Capacitance liquid level transmitter Download PDFInfo
- Publication number
- CN202793522U CN202793522U CN 201220372084 CN201220372084U CN202793522U CN 202793522 U CN202793522 U CN 202793522U CN 201220372084 CN201220372084 CN 201220372084 CN 201220372084 U CN201220372084 U CN 201220372084U CN 202793522 U CN202793522 U CN 202793522U
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- electric capacity
- measuring tube
- measuring
- level transmitter
- pressure pad
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Abstract
The utility model discloses a capacitance liquid level transmitter. The capacitance liquid level transmitter comprises a main measuring capacitor, wherein the main measuring capacitor is electrically connected with a reference measuring capacitor, and the height of the reference measuring capacitor is smaller than the main measuring capacitor. If a measured medium is not dipped into the reference measuring capacitor, parts of dielectric constant change of gas can be calculated and a measured value of a product can be corrected by detecting capacity value change of the reference capacitor. If the reference capacitor is completely dipped into the measured medium, the variable quantity of dielectric constant of the measured medium can be calculated and the measured value of the product can be corrected by detecting the capacity value change of the reference measuring capacitor. Measuring errors caused by the dielectric constant change of the measured medium are eliminated by introducing the reference capacitor, and the measuring accuracy is improved. The problem that a used calibrated medium and an actually-measured medium are same when capacitance liquid level transmitter leaves a factory, otherwise in-site calibration is performed is solved.
Description
Technical field
The utility model relates to a kind of fluid level transmitter, particularly a kind of electric capacity fluid level transmitter be used to measuring non-conductive medium liquid level.
Background technology
Capacitance level transducer mainly is to utilize the specific inductive capacity of different insulating mediums different for the liquid level of measuring non-conductive medium, and the capacitance of two pole plates will change when filling different media between two pole plates of measuring sonde.Realize the measurement of liquid level by the electric capacity between two pole plates of detection probe.
Useful area after the measuring sonde of capacitance level transducer completes between two pole plate and distance all immobilize.Wherein, the variation of the electric capacity between two pole plates mainly is that the variation of specific inductive capacity causes.
Medium in actual measurement between two pole plates is not single medium, but jointly is made of measured medium and top gas thereof.Only the electric capacity between two pole plates in the situation constant by the specific inductive capacity of medium and upper gas thereof and the height of liquid level are linear.But then its scale-up factor will change when the specific inductive capacity of measured medium and its upper gas changes, and this also causes the measurement of product inaccurate, need to confirm new scale-up factor by again demarcating.
The utility model content
The technical problems to be solved in the utility model provides a kind of electric capacity fluid level transmitter, eliminates the impact of variation on measuring of measured medium, ensures the accuracy of measuring.
In order to solve the problems of the technologies described above, a kind of electric capacity fluid level transmitter of the present utility model comprises the main electric capacity of measuring, and the described main electric capacity of measuring is electrically connected with reference measure electric capacity, and the height of this reference measure electric capacity is less than the main electric capacity of measuring.
As improvement of the technical scheme, described reference measure electric capacity is positioned at the main electric capacity inside of measuring.
As improvement of the technical scheme, the described main electric capacity of measuring comprises the first measuring tube, be provided with the second measuring tube in the first measuring tube, be provided with the spacing block with both isolation between first, second measuring tube, the first measuring tube two ends are packaged with respectively first, second plug.
As improvement of the technical scheme, be respectively arranged with first, second cavity in described first, second plug, be separately installed with first, second pressure pad in this first, second cavity, have first, second relative recess on first, second pressure pad, described the second measuring tube two ends are chimeric fixing with first, second recess respectively.
As improvement of the technical scheme, described reference measure electric capacity comprises the 3rd measuring tube, be provided with the 4th measuring tube in the 3rd measuring tube, be provided with the 3rd, the 4th pressure pad in described the second measuring tube, described the 3rd, the 4th measuring tube all is fixed between the 3rd, the 4th pressure pad and makes the 3rd measuring tube and the isolation of the second measuring tube.
As improvement of the technical scheme, have respectively the 3rd, the 4th cavity of from outside to inside stepped distribution on described the 3rd, the 4th pressure pad, wherein the 3rd measuring tube two ends are flush-mounted in the 3rd cavity, and the 4th measuring tube two ends are flush-mounted in the 4th cavity.
As improvement of the technical scheme, be provided with first, second welding block in described the second measuring tube, this first, second welding block places respectively the 3rd, the 4th pressure pad outside, and this first, second welding block and the second measuring tube are welded and fixed after adjusting the 3rd, the 4th pressure pad position.Be provided with most advanced and sophisticated projection on described first, second welding block.
The beneficial effects of the utility model are: this electric capacity fluid level transmitter has increased an aspect ratio master on the basis of main measurement electric capacity and has measured the little reference measure electric capacity of electric capacity owing to adopted said structure.As measured medium be not dipped into reference measure electric capacity then can change to calculate by the appearance value that detects reference capacitance gas part change in dielectric constant and the measured value of product revised; Be fully immersed in the measured medium such as reference capacitance, then can change by the appearance value that detects reference measure electric capacity to calculate measured medium specific inductive capacity variable quantity and the measured value of product revised.Eliminate the measuring error of bringing because of the measured medium change in dielectric constant by introducing reference capacitance, improve the precision of measuring.Solved that the medium of employed demarcation medium and actual measurement was necessary for same medium when the electric capacity fluid level transmitter dispatched from the factory, otherwise must carry out the problem of on-site proving.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is STRUCTURE DECOMPOSITION figure of the present utility model.
Embodiment
With reference to Fig. 1, Fig. 2, a kind of electric capacity fluid level transmitter of the present utility model comprises the main electric capacity 1 of measuring, and the described main electric capacity 1 of measuring is electrically connected with reference measure electric capacity 2, and the height of this reference measure electric capacity 2 is less than the main electric capacity 1 of measuring.Described reference measure electric capacity 2 is positioned at main electric capacity 1 inside of measuring.This electric capacity fluid level transmitter has increased an aspect ratio master on the basis of main measurement electric capacity and has measured the little reference measure electric capacity of electric capacity owing to adopted said structure.As measured medium be not dipped into reference measure electric capacity then can change to calculate by the appearance value that detects reference capacitance gas part change in dielectric constant and the measured value of product revised; Be fully immersed in the measured medium such as reference capacitance, then can change by the appearance value that detects reference measure electric capacity to calculate measured medium specific inductive capacity variable quantity and the measured value of product revised.Eliminate the measuring error of bringing because of the measured medium change in dielectric constant by introducing reference capacitance, improve the precision of measuring.Solved that the medium of employed demarcation medium and actual measurement was necessary for same medium when the electric capacity fluid level transmitter dispatched from the factory, otherwise must carry out the problem of on-site proving.
In the present embodiment, the described main electric capacity 1 of measuring comprises the first measuring tube 3, be provided with the second measuring tube 4 in the first measuring tube 3, be provided with the spacing block 5 with both isolation between first, second measuring tube 3,4, the first measuring tube 3 two ends are packaged with respectively first, second plug 6,7, have avoided the contact of first, second measuring tube to cause bad.
Be respectively arranged with first, second cavity 8,9 in described first, second plug 6,7, this first, second cavity 8,9 interior installations are separately installed with first, second pressure pad 10,11, have first, second relative recess 12,13 on first, second pressure pad 10,11, described the second measuring tube 4 two ends respectively with first, second recess 12,13 chimeric fixing, make the second measuring tube 4 obtain good location, structure is more firm.
Described reference measure electric capacity 2 comprises the 3rd measuring tube 14, be provided with the 4th measuring tube 15 in the 3rd measuring tube 14, be provided with the 3rd, the 4th pressure pad 16,17 in described the second measuring tube 4, described the 3rd, the 4th measuring tube 14,15 all is fixed between the 3rd, the 4th pressure pad 16,17 and makes the 3rd measuring tube 14 and 4 isolation of the second measuring tube.
The the 3rd, the 4th cavity 18,19 that has respectively from outside to inside stepped distribution on described the 3rd, the 4th pressure pad 16,17, wherein the 3rd measuring tube 14 two ends are flush-mounted in the 3rd cavity 18, the 4th measuring tube 15 two ends are flush-mounted in the 4th cavity 19, so that the 3rd, the 4th measuring tube 14,15 separates fully, and the 3rd, the 4th cavity 18,19 stepped distributions are convenient to the 3rd, the 4th measuring tube 14,15 installation location.
Be provided with first, second welding block 20,21 in described the second measuring tube 4, this first, second welding block 20,21 places respectively the 3rd, the 4th pressure pad 16,17 outsides, and this first, second welding block 20, the 21 and second measuring tube 4 are welded and fixed after adjusting the 3rd, the 4th pressure pad 16,17 positions.When installing, three, the 4th measuring tube 14,15 is fixed by the 3rd, the 4th pressure pad 16,17, compress with first, second welding block 20,21 at two again, after moving to the second measuring tube 4 a certain desired locations, with spot welding method first, second welding block 20,21 is spoted weld in the second measuring tube 4 again, install fast, simple to operate.
In addition, be provided with most advanced and sophisticated projection 2 on described first, second welding block 20,21, it is more concentrated to subtract the snap-in force that makes between first, second welding block 20, the 21 and the 3rd, the 4th pressure pad 16,17.
The above only is preferential embodiment of the present utility model, as long as realize that with basic identical means the technical scheme of the utility model purpose all belongs within the protection domain of the present utility model.
Claims (8)
1. an electric capacity fluid level transmitter comprises the main electric capacity (1) of measuring, and it is characterized in that: the described main electric capacity (1) of measuring is electrically connected with reference measure electric capacity (2), and the height of this reference measure electric capacity (2) is less than the main electric capacity (1) of measuring.
2. electric capacity fluid level transmitter according to claim 1 is characterized in that: described reference measure electric capacity (2) is positioned at main electric capacity (1) inside of measuring.
3. electric capacity fluid level transmitter according to claim 2, it is characterized in that: the described main electric capacity (1) of measuring comprises the first measuring tube (3), be provided with the second measuring tube (4) in the first measuring tube (3), be provided with the spacing block (5) with both isolation between first, second measuring tube (3,4), the first measuring tube (3) two ends are packaged with respectively first, second plug (6,7).
4. electric capacity fluid level transmitter according to claim 3, it is characterized in that: be respectively arranged with first, second cavity (8,9) in described first, second plug (6,7), be separately installed with first, second pressure pad (10,11) in this first, second cavity (8,9), have first, second relative recess (12,13) on first, second pressure pad (10,11), described the second measuring tube (4) two ends are chimeric fixing with first, second recess (12,13) respectively.
5. according to electric capacity fluid level transmitter claimed in claim 3, it is characterized in that: described reference measure electric capacity (2) comprises the 3rd measuring tube (14), be provided with the 4th measuring tube (15) in the 3rd measuring tube (14), be provided with the 3rd, the 4th pressure pad (16,17) in described the second measuring tube (4), described the 3rd, the 4th measuring tube (14,15) all is fixed between the 3rd, the 4th pressure pad (16,17) and makes the 3rd measuring tube (14) and the second measuring tube (4) isolation.
6. according to electric capacity fluid level transmitter claimed in claim 5, it is characterized in that: the 3rd, the 4th cavity (18,19) that has respectively from outside to inside stepped distribution on described the 3rd, the 4th pressure pad (16,17), wherein the 3rd measuring tube (14) two ends are flush-mounted in the 3rd cavity (18), and the 4th measuring tube (15) two ends are flush-mounted in the 4th cavity (19).
7. according to electric capacity fluid level transmitter claimed in claim 5, it is characterized in that: be provided with first, second welding block (20,21) in described the second measuring tube (4), this first, second welding block (20,21) places respectively the 3rd, the 4th pressure pad (16,17) outside, and this first, second welding block (20,21) is welded and fixed with the second measuring tube (4) after adjusting the 3rd, the 4th pressure pad (16,17) position.
8. according to electric capacity fluid level transmitter claimed in claim 7, it is characterized in that: be provided with most advanced and sophisticated projection (22) on described first, second welding block (20,21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372084 CN202793522U (en) | 2012-07-30 | 2012-07-30 | Capacitance liquid level transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372084 CN202793522U (en) | 2012-07-30 | 2012-07-30 | Capacitance liquid level transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202793522U true CN202793522U (en) | 2013-03-13 |
Family
ID=47820768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220372084 Withdrawn - After Issue CN202793522U (en) | 2012-07-30 | 2012-07-30 | Capacitance liquid level transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202793522U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829841A (en) * | 2012-07-30 | 2012-12-19 | 新会康宇测控仪器仪表工程有限公司 | Capacitance liquid level transmitter |
| CN104501907A (en) * | 2014-11-20 | 2015-04-08 | 北京航空航天大学 | Aircraft fuel measuring and controlling system with self compensation capacitance type level sensor |
| CN109459112A (en) * | 2018-09-21 | 2019-03-12 | 浙江大学宁波理工学院 | The granulated fertilizer allowance detector of fertilizer distributor |
| CN109839170A (en) * | 2017-11-29 | 2019-06-04 | 中国航发商用航空发动机有限责任公司 | Liquid level sensor |
| CN113252136A (en) * | 2021-05-12 | 2021-08-13 | 北京布莱迪测控仪表有限公司 | Liquid level sensor |
-
2012
- 2012-07-30 CN CN 201220372084 patent/CN202793522U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829841A (en) * | 2012-07-30 | 2012-12-19 | 新会康宇测控仪器仪表工程有限公司 | Capacitance liquid level transmitter |
| CN102829841B (en) * | 2012-07-30 | 2014-07-30 | 新会康宇测控仪器仪表工程有限公司 | Capacitance liquid level transmitter |
| CN104501907A (en) * | 2014-11-20 | 2015-04-08 | 北京航空航天大学 | Aircraft fuel measuring and controlling system with self compensation capacitance type level sensor |
| CN104501907B (en) * | 2014-11-20 | 2017-08-25 | 北京航空航天大学 | Aircraft fuel oil oil mass TT＆C system with self compensation capacitance level transducer |
| CN109839170A (en) * | 2017-11-29 | 2019-06-04 | 中国航发商用航空发动机有限责任公司 | Liquid level sensor |
| CN109839170B (en) * | 2017-11-29 | 2021-04-23 | 中国航发商用航空发动机有限责任公司 | Liquid level sensor |
| CN109459112A (en) * | 2018-09-21 | 2019-03-12 | 浙江大学宁波理工学院 | The granulated fertilizer allowance detector of fertilizer distributor |
| CN113252136A (en) * | 2021-05-12 | 2021-08-13 | 北京布莱迪测控仪表有限公司 | Liquid level sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20140730 |
|
| RGAV | Abandon patent right to avoid regrant |