CN102384813A - Remote-transmission pressure and differential pressure transmitter with temperature compensation piston - Google Patents
Remote-transmission pressure and differential pressure transmitter with temperature compensation piston Download PDFInfo
- Publication number
- CN102384813A CN102384813A CN2011103469436A CN201110346943A CN102384813A CN 102384813 A CN102384813 A CN 102384813A CN 2011103469436 A CN2011103469436 A CN 2011103469436A CN 201110346943 A CN201110346943 A CN 201110346943A CN 102384813 A CN102384813 A CN 102384813A
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- teletransmission
- temperature compensation
- pressure
- differential pressure
- compensation piston
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Abstract
The invention discloses a remote-transmission pressure and differential pressure transmitter with a temperature compensation piston. The remote-transmission pressure and differential pressure transmitter comprises a measurement conversion part (1), an electronic transmission part (2), a capillary (3), filling liquid (4) and a remote-transmission membrane box (5) and is characterized in that the capillary (3) or the measurement conversion part (1) or the remote-transmission membrane box (5) is provided with a temperature compensation piston (9); and the remote-transmission membrane box (5) is communicated with the temperature compensation piston (9) by the capillary (3) and a branch capillary (8). When the remote-transmission pressure and differential pressure transmitter is used for measuring the pressure, the differential pressure or the liquid level of a high-temperature medium, the phenomenon that an instrument is damaged because of the excessive expansion of filling liquid can be effectively prevented so as to achieve the purposes of instrument protection and accurate measurement.
Description
Technical field
The present invention relates to a kind of teletransmission pressure, differential pressure transmitter that has the temperature compensation piston, is used to measure high-temperature medium pressure, differential pressure or liquid level.
Background technology
The teletransmission pressure, the differential pressure transmitter that are used to measure high-temperature medium and cryogenic media pressure, differential pressure or liquid level at present structurally are the same; As broad as long, all become and send part, kapillary, filling liquid and teletransmission bellows etc. to form (the teletransmission bellows is made up of pedestal and isolation diaphragm) by measurement conversion portion, electronics.Measure high-temperature medium and be that with the teletransmission pressure of measuring cryogenic media, the difference of differential pressure transmitter filling liquid is different.Measure high-temperature medium the transmitter filling be high-temperature silicon oil, measure cryogenic media the transmitter filling be common silicone oil or fluorocarbon oil.Present this teletransmission pressure, differential pressure transmitter can normally use when measuring cryogenic media, but when measuring high-temperature medium, even filling is high-temperature silicon oil in the transmitter; Exist owing to always have volatile matter in the high-temperature silicon oil,, just be easy to cause in use if filling is excessive again for high-temperature silicon oil; High-temperature silicon oil parectasis in the teletransmission bellows; Isolation diaphragm external drum on the teletransmission bellows is transfinited, produce permanent strain, also can cause high-temperature silicon oil to leak when serious; Cause instrument to be damaged, measure inaccurate.This situation is because this kind transmitter structurally can't carry out the silicone oil that receives the high volume expansion due to the temperature compensation processing, is inevitable.
Summary of the invention
Technical matters to be solved by this invention is exactly when measuring high-temperature medium pressure, differential pressure, can't compensate processing in order to overcome present this teletransmission pressure, differential pressure transmitter to the high-temperature silicon oil that expands; Cause the isolation diaphragm external drum to transfinite, produce the shortcoming of permanent strain, damage instrument; Provide a kind of and can carry out teletransmission pressure, the differential pressure transmitter that temperature compensation is handled, thereby guarantee that transmitter is not damaged in the pressure of measuring high-temperature medium, differential pressure process the silicone oil that receives the high volume expansion.
In order to solve the problems of the technologies described above; The technical scheme that the present invention adopted is: a kind of teletransmission pressure, differential pressure transmitter that has the temperature compensation piston; Comprise that measuring conversion portion, electronics becomes and send part, kapillary, filling liquid and teletransmission bellows, on its kapillary or on the measurement conversion portion or on the teletransmission bellows temperature compensation piston is housed.
Described teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston, its teletransmission bellows is connected with the temperature compensation piston through kapillary, branched hair tubule, on the branched hair tubule stop valve is housed.
Described teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston, its temperature compensation piston is made up of piston, piston cylinder, leading screw and rotation hand wheel.
On the kapillary of teletransmission pressure, differential pressure transmitter or measure on the conversion portion or on the teletransmission bellows temperature compensation piston is housed, the teletransmission bellows is connected through kapillary, branched hair tubule with the temperature compensation piston.This kind have the teletransmission pressure of temperature compensation piston, when differential pressure transmitter is made in manufacturer; Can piston be placed the inner end of piston cylinder; Vacuumize like this, the fabrication and processing technology with the teletransmission bellows-type pressure of temperature compensation piston, differential pressure transmitter is the same when irritating filling liquid with not, the account temperature compensating piston is not to the influence of processing and fabricating.The teletransmission pressure unit has a teletransmission bellows and a temperature compensation piston, and the teletransmission differential pressure transmitter has high pressure, two teletransmission bellows of low pressure and two temperature compensation pistons.Go into operation when technology, medium temperature raises gradually, the technology valve of opening installation before transmitter teletransmission bellows at this moment, and the isolation diaphragm on the teletransmission bellows contacts with processing medium, and the temperature of filling liquid is also along with the temperature of medium raises gradually in the teletransmission bellows.After medium temperature reached required value, temperature no longer raise, and is relatively stable near required value, and at this moment the temperature of filling liquid is also relatively stable near required value in the teletransmission bellows.At this moment close the preceding technology valve of teletransmission bellows, open the pressure release plug on the teletransmission bellows front complement flange, make the pressure of the preceding processing medium of bellows equal atmospheric pressure.Intensification with medium is relatively stable in this process of technological requirement value until temperature; The volumetric expansion of being heated of filling liquid in the teletransmission bellows; Produce certain tension, promote the isolation diaphragm outward bulge, because the space sealing; Filling liquid in the teletransmission bellows has just produced certain pressure, knows the pressure size that filling liquid produces because of expanded by heating through the static pressure displayed value of instrument.If pressure is bigger; Reach a certain numerical value, be not damaged, rotate rotation hand wheel piston is outwards moved in order to protect isolation diaphragm; In the filling liquid suction piston cylinder that has more because of the expanded by heating volume, the pressure that produces bellows internal cause filling liquid expanded by heating lowers.When the static pressure displayed value of instrument drops to atmospheric pressure, the rotation hand wheel that stops operating, at this moment adjustment zero point of transmitter once again, transmitter can normally use.
The beneficial effect that compared with prior art the present invention had is: because the teletransmission bellows is connected to the temperature compensation piston through kapillary, branched hair tubule; Make that the expanded by heating volume has more in the teletransmission bellows the filling fluid power be drawn in the temperature compensation piston; Transfinite, produce phenomenons such as permanent strain, filling liquid leakage, instrument damage like this with regard to the isolation diaphragm external drum that has prevented effectively to cause because of the filling liquid overexpansion; Thereby protected isolation diaphragm and instrument not to be damaged effectively, this existing teletransmission pressure, differential pressure transmitter can't be accomplished.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Accompanying drawing is the structural representation of an embodiment of the present invention.
Embodiment
1 measures the change of conversion portion 2 electronics send part 3 kapillaries 4 filling liquid 5 teletransmission bellows 6 isolation diaphragms 7 pedestals 8 branched hair tubules 9 temperature compensation pistons 10 stop valves 11 pistons 12 piston cylinders 13 leading screws 14 rotation hand wheels
Shown in accompanying drawing: pick out a branched hair tubule 8 respectively on two capillaries 3 of teletransmission differential pressure transmitter; The other end at branched hair tubule 8 is equipped with temperature compensation piston 9; Leading screw 13 and rotation hand wheel 14 are housed on the piston 11, stop valve 10 is housed on branched hair tubule 8.
Claims (3)
1. teletransmission pressure, differential pressure transmitter that has the temperature compensation piston; Comprise that measuring conversion portion (1), electronics becomes and send part (2), kapillary (3), filling liquid (4) and teletransmission bellows (5), is characterized in that: kapillary (3) go up or measurement conversion portion (1) or teletransmission bellows (5) on temperature compensation piston (9) is housed.
2. teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston according to claim 1; It is characterized in that: teletransmission bellows (5) is connected with temperature compensation piston (9) through kapillary (3), branched hair tubule (8), and stop valve (10) is housed on the branched hair tubule (8).
3. teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston according to claim 1 is characterized in that temperature compensation piston (9) is made up of piston (11), piston cylinder (12), leading screw (13) and rotation hand wheel (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103469436A CN102384813A (en) | 2011-11-07 | 2011-11-07 | Remote-transmission pressure and differential pressure transmitter with temperature compensation piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103469436A CN102384813A (en) | 2011-11-07 | 2011-11-07 | Remote-transmission pressure and differential pressure transmitter with temperature compensation piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102384813A true CN102384813A (en) | 2012-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103469436A Pending CN102384813A (en) | 2011-11-07 | 2011-11-07 | Remote-transmission pressure and differential pressure transmitter with temperature compensation piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102384813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858096A (en) * | 2021-01-29 | 2021-05-28 | 晨光生物科技集团股份有限公司 | Differential pressure type densimeter measuring and protecting device |
-
2011
- 2011-11-07 CN CN2011103469436A patent/CN102384813A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858096A (en) * | 2021-01-29 | 2021-05-28 | 晨光生物科技集团股份有限公司 | Differential pressure type densimeter measuring and protecting device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120321 |