CN2559970Y - Electronic liquid level gauge - Google Patents
Electronic liquid level gauge Download PDFInfo
- Publication number
- CN2559970Y CN2559970Y CN 02274964 CN02274964U CN2559970Y CN 2559970 Y CN2559970 Y CN 2559970Y CN 02274964 CN02274964 CN 02274964 CN 02274964 U CN02274964 U CN 02274964U CN 2559970 Y CN2559970 Y CN 2559970Y
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- CN
- China
- Prior art keywords
- pressure
- transmitter
- differential pressure
- pressure sensor
- level gauge
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Measuring Fluid Pressure (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A putting-into-type electronic level gauge which is made according to the differential pressure principle comprises a shell body connected with a pressure vessel and a differential pressure sensor or a transmitter fixedly arranged on the shell. The technical essential of the electronic level gauge is that pressure compensators in the assembled shell are respectively connected with the differential pressure sensor or one voltage measuring end of the transmitter and communicated with the bottom of the pressure vessel by nozzles and through thin pipes; a pressure sensor arranged on the bottom of the pressure vessel is connected with the differential pressure sensor or another voltage measuring end of the transmitter by unitizing the nozzles in the shell body and through thin pipes. The ends of the pressure sensor and the pressure compensator are respectively provided with pressure sensitive membranes. Guiding press medium are encapsulated in the cavity of the pressure sensor and the thin pipes communicated with the cavity. The electronic level gauge has the advantages of compact structure, small volume, convenient transportation, being not easy to be broken, easy single-hole installation and operation and having no zero excursion, which effectively reduces cost and enhances measuring accuracy.
Description
Technical field
The utility model relates to the measurement mechanism of liquid level in the pressure vessel of a kind of high temperate zone.Particularly a kind of differential pressure principle throw-in type electronic level meter.
Background technology
At present, in commercial production and robotization control procedure, often can run into level gauging, metering, Control work to liquid in the pressure vessel of high temperate zone, traditional measurement method generally adopts methods such as electric keg float and the two flanges of external differential pressure teletransmission.Adopt these measuring methods, not only measurement mechanism complex structure, heaviness, cost height, and measuring accuracy is low, utensil is fragile, transportation, trouble is installed.
1, adopts electric keg float measuring method as shown in Figure 1.
Upper and lower side at band pressure vessel 1 sidewall respectively is provided with a port of being with joint flange, is connected with the port of electric keg float 2 joint flanges, forms linker.By lever 4 interior keg float 3 is installed in the electricity keg float 2, when interior keg float 3 is subjected to buoyancy, by lever 4, through shaft seal 5 buoyancy is passed to lever 6, lever 6 is added to the buoyancy that transmits on the force transducer 7, and sensor 7 changes into electric signal with the buoyancy that receives, after signal processor 8 is handled, the outputting standard signal is realized the measurement of liquid level in the container.
From the measuring method of electric keg float as can be seen the subject matter of its existence be: when interior keg float 3 vibrations, the error of generation is very big, sometimes even can't measure; Because lever 4 is by shaft seal 5 buoyancy to be spread out of, and has resistance and friction force between shaft seal 5 and the lever 4, it is relevant with dynamic pressure in the container, so the factor of influence measurement can not determine that systematic measurement error is bigger.Therefore, handle as normal signal, The measuring precision is generally about 5%F.S; Both made and adopted state-of-the-art intelligent signal processing system, preferably precision also can only be about 1%F.S.The general cost of device therefor is about 20,000 yuan, and price is applied so influence it more than 2.5 yuan.
2, adopt the two flange measuring methods of differential pressure teletransmission as shown in Figure 2.
The pressure of liquid level generation adds the interior pressure of upper container in band pressure vessel 1, when acting on the end teletransmission flange 13 of differential pressure transmitter 6, passes to sensor one end of differential pressure transmitter 6 by the pilot medium in the convoluted diaphragm on it, the kapillary 12.Wherein the interior pressure of container 1 also acts on another flange 9 of differential pressure transmitter 6 simultaneously, and passes to the other end of differential pressure pick-up 6 by the pilot medium in the diaphragm on it, the kapillary 10.Compress in the container in the pressure at two ends and disappear, differential pressure pick-up 6 becomes the pressure signal that the liquid level that spreads out of produces into the output of liquid level signal after treatment.
Also there is certain defective in this measuring method: the position of the teletransmission kapillary 10,12 that the first is connected with two flanges is bad fixing, is easy to generate error; Its two be two flanges when mounted, very big difference in height is arranged up and down, bias pressure is too big, system will carry out zero shift on a large scale as long as install; It three is in the container during temperature variation, and the liquid level error of generation is bigger, and the error that produces during vibration is also big.Therefore, cumulative errors are just bigger.Two flanges are operated pretty troublesome in transportation and installation process.In use utensil also damages easily.
Summary of the invention
The purpose of this utility model provides a kind of differential pressure principle throw-in type electronic level meter, its compact conformation, and volume is little, and convenient transportation is not fragile, and the single hole fitting operation is very simple, need not carry out zero shift, effectively reduces cost and improves measuring accuracy.
The purpose of this utility model is achieved in that this device comprises with the band housing that joins of pressure vessel and installs differential pressure pick-up or transmitter on it, its technical essential is that the pressure compensator utilization in the assemble case is taken over and joined with differential pressure pick-up or transmitter one pressure measurement end respectively and communicate with the bottom of band pressure vessel by kapillary, place the inductor of band pressure vessel bottom to utilize the adapter in the housing and join by kapillary and differential pressure pick-up or another pressure measurement end of transmitter, the end of inductor and pressure compensator is provided with pressure-sensitive diaphragm respectively, the cavity of inductor and the interior encapsulation of the kapillary pilot medium that is communicated with it.
Because the utility model still adopts the throw-in type structure of differential pressure measurement principle design, so except that the advantage that reservation differential pressure measurement principle has, can also substitute electric keg float, single hole drops into container under the geodetic.Because of this device passes through the inductor of band pressure vessel bottom and the pressure compensator that the kapillary bottom the utilization band pressure vessel is communicated with, two pressure measurement ends with differential pressure pick-up or transmitter join respectively, so need not carry out zero shift, measuring accuracy is about 0.5%F.S～0.2%F.S, compared with prior art, effectively improve measuring accuracy.Its compact conformation, volume is little, and cost is low, and kapillary can be coiled during transportation, and is not fragile, and the single hole fitting operation is simple, convenient,
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is electric keg float measuring principle figure.
Fig. 2 is the two flange measuring principle figure of differential pressure teletransmission.
Fig. 3 is a kind of concrete structure synoptic diagram of the present utility model.
Embodiment
Describe concrete structure of the present utility model in detail according to Fig. 1-3.This device adopts the differential pressure principle throw-in type structure of differential pressure pick-up or transmitter control.As shown in Figure 3, it comprises parts such as housing 20, differential pressure pick-up or transmitter 18, inductor 24, pressure compensator 15 and connection kapillary 14,17,19,23 thereof.Wherein the specification of differential pressure pick-up or transmitter 18 can be determined according to actual operating position.Housing 20 can be provided with joint flange 22, is connected by its joint flange with band pressure vessel 1; Also can make it connect (draw at the end among the figure) by screw thread with band pressure vessel 1.Above housing 20, install differential pressure pick-up or transmitter 18.Pressure compensator 15 in the assemble case 20 utilizes adapter 16 and joins by kapillary 17 and differential pressure pick-up or transmitter one pressure measurement end, communicates by the bottom of kapillary 14 with band pressure vessel 1.Place the inductor 24 of band pressure vessel 1 bottom to utilize the adapter 16 in the housing 20 and join by kapillary 19,23 and differential pressure pick-up or transmitter 18 another pressure measurement ends, the end of inductor 24 and pressure compensator 15 is provided with pressure- sensitive diaphragm 25,21 respectively, the cavity of inductor 24 and kapillary 24, the 19 interior encapsulation pilot media that are communicated with it.
During use, this device is packed on the band pressure vessel 1.The pressure that the liquid level of container bottom produces adds container inner pressure, and by the pressure-sensitive diaphragm on the inductor 24 25, the pilot medium in kapillary 23,19 is passed to a pressure measurement end of differential pressure pick-up or transmitter 18; Container internal pressure is by the pressure-sensitive diaphragm 17 on the pressure compensator 15, again through kapillary 17, continuous with another pressure measurement end of differential pressure pick-up or transmitter 18.The differential pressure signal net value that differential pressure pick-up or transmitter 18 are received after routine is handled, is exported liquid level signal.In this system, kapillary 14 when inclination and vibration, temperature variation are arranged, also plays compensating action simultaneously as the bias pressure compensation.
Claims (1)
1, a kind of electronic level meter, comprise with the band housing that joins of pressure vessel and install differential pressure pick-up or transmitter on it, it is characterized in that: the pressure compensator utilization in the assemble case is taken over and is joined with differential pressure pick-up or transmitter one pressure measurement end respectively and communicate with the bottom of band pressure vessel by kapillary, place the inductor of band pressure vessel bottom to utilize the adapter in the housing and join by kapillary and differential pressure pick-up or another pressure measurement end of transmitter, the end of inductor and pressure compensator is provided with pressure-sensitive diaphragm respectively, the cavity of inductor and the interior encapsulation of the kapillary pilot medium that is communicated with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02274964 CN2559970Y (en) | 2002-08-27 | 2002-08-27 | Electronic liquid level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02274964 CN2559970Y (en) | 2002-08-27 | 2002-08-27 | Electronic liquid level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2559970Y true CN2559970Y (en) | 2003-07-09 |
Family
ID=33739115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02274964 Expired - Lifetime CN2559970Y (en) | 2002-08-27 | 2002-08-27 | Electronic liquid level gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2559970Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813504A (en) * | 2010-04-26 | 2010-08-25 | 长沙华时捷环保科技发展有限公司 | Pneumatic control type accurate measuring device |
| CN105486376A (en) * | 2016-01-15 | 2016-04-13 | 庞极洲 | Built-in type liquid level measurement device and working method thereof |
| CN113199323A (en) * | 2021-05-26 | 2021-08-03 | 宿州市正辰环保科技有限公司 | Ground grinding machine capable of grinding multiple slopes |
-
2002
- 2002-08-27 CN CN 02274964 patent/CN2559970Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813504A (en) * | 2010-04-26 | 2010-08-25 | 长沙华时捷环保科技发展有限公司 | Pneumatic control type accurate measuring device |
| CN105486376A (en) * | 2016-01-15 | 2016-04-13 | 庞极洲 | Built-in type liquid level measurement device and working method thereof |
| CN105486376B (en) * | 2016-01-15 | 2019-01-29 | 庞极洲 | A kind of built-in liquid level emasuring device and its working method |
| CN113199323A (en) * | 2021-05-26 | 2021-08-03 | 宿州市正辰环保科技有限公司 | Ground grinding machine capable of grinding multiple slopes |
| CN113199323B (en) * | 2021-05-26 | 2022-08-09 | 青岛美力实新材料有限公司 | Ground grinding machine capable of grinding multiple slopes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120827 Granted publication date: 20030709 |