CN202329922U - Remote pressure and differential pressure transmitter with temperature compensating piston - Google Patents
Remote pressure and differential pressure transmitter with temperature compensating piston Download PDFInfo
- Publication number
- CN202329922U CN202329922U CN2011204841760U CN201120484176U CN202329922U CN 202329922 U CN202329922 U CN 202329922U CN 2011204841760 U CN2011204841760 U CN 2011204841760U CN 201120484176 U CN201120484176 U CN 201120484176U CN 202329922 U CN202329922 U CN 202329922U
- Authority
- CN
- China
- Prior art keywords
- teletransmission
- pressure
- piston
- differential pressure
- temperature compensation
- Prior art date
- 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 - Fee Related
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a remote pressure and differential pressure transmitter with a temperature compensating piston, comprising a measuring and converting part (1), an electronic transmitting part (2), a capillary tube (3), filling liquid (4), a connecting rod (13) and a remote diaphragm capsule (5). The remote pressure and differential pressure transmitter is characterized in that the capillary tube (3) or the connecting rod (13) is connected with a temperature compensating piston (8) in series. The temperature compensating piston (8) is composed of a piston cylinder (9), a hollow through-hole piston (10), an adjusting nut (11) and a locking nut (12). The remote pressure and differential pressure transmitter can effectively avoid a phenomenon that a gauge is damaged as the filling liquid is excessively expanded when pressure, differential pressure or liquid level of high temperature medium is measured, and thus the aims of protecting the gauge and accurately measuring are achieved.
Description
Technical field
The utility model relates to teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston on a kind of kapillary or the connecting link, 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.
The utility model content
The utility model technical matters to be solved 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 utility model 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, connecting link and teletransmission bellows, has been serially connected with the temperature compensation piston on its kapillary or on the connecting link.
Described teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston, its temperature compensation piston is made up of piston cylinder, hollow bore piston, adjustment nut and check nut.
Described teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston has hollow bore on its hollow bore piston, and it is connected with kapillary or connecting link, is connected with teletransmission bellows and measurement conversion portion through kapillary or connecting link.
Be serially connected with the temperature compensation piston on the kapillary of teletransmission pressure, differential pressure transmitter or on the connecting link; The teletransmission bellows is connected with the measurement conversion portion through connecting link, temperature compensation piston and kapillary; The temperature compensation piston becomes a connecting link or a part capillaceous, becomes the one section conduit that can regulate the filling liquid storage area.This kind have the teletransmission pressure of temperature compensation piston, when differential pressure transmitter is made in manufacturer; Can the hollow bore piston be placed the inner end of piston cylinder; Vacuumize like this, the fabrication and processing technology with the teletransmission 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 teletransmission 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 in order to protect isolation diaphragm, rotation adjustment nut outwards moves the hollow bore piston; In the filling liquid suction piston cylinder that has more because of the expanded by heating volume, the pressure that produces teletransmission bellows internal cause filling liquid expanded by heating lowers.When the static pressure displayed value of instrument dropped to atmospheric pressure, the adjustment nut that stops the rotation was fixed the adjustment nut with check nut, and at this moment adjustment zero point of transmitter once again, transmitter can normally use.
The beneficial effect that compared with prior art the utility model had is: because the teletransmission bellows is serially connected with the temperature compensation piston through kapillary or connecting link; 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 utility model is described in further detail:
Accompanying drawing is the structural representation of a kind of embodiment of the utility model.
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 temperature compensation pistons 9 piston cylinders 10 hollow bore pistons 11 adjustment nuts 12 check nuts 13 connecting links
Shown in accompanying drawing: be serially connected with temperature compensation piston 8 on the connecting link 13 of teletransmission pressure unit, temperature compensation piston 8 is made up of piston cylinder 9, hollow bore piston 10, adjustment nut 11 and check nut 12.Done hollow bore on the hollow bore piston 10, it is connected with kapillary.Temperature compensation piston 8 is connected with teletransmission bellows 5 and measurement conversion portion 1 through connecting link 13, kapillary 3.
The utility model is not limited to above-mentioned embodiment, if kapillary 3 on or be serially connected with temperature compensation piston 8 on the connecting link 13, no matter be teletransmission pressure unit or teletransmission differential pressure transmitter, all drop within the protection domain of the utility model.
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), connecting link (13) and teletransmission bellows (5), is characterized in that: be serially connected with temperature compensation piston (8) on the kapillary (3) or on the connecting link (13).
2. teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston according to claim 1 is characterized in that temperature compensation piston (8) is made up of piston cylinder (9), hollow bore piston (10), adjustment nut (11) and check nut (12).
3. teletransmission pressure, the differential pressure transmitter that has the temperature compensation piston according to claim 1 and 2; It is characterized in that having done hollow bore on the hollow bore piston (10); It is connected with kapillary (3) or connecting link (13), is connected with teletransmission bellows (5) and measurement conversion portion (1) through kapillary (3) or connecting link (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204841760U CN202329922U (en) | 2011-11-19 | 2011-11-19 | Remote pressure and differential pressure transmitter with temperature compensating piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204841760U CN202329922U (en) | 2011-11-19 | 2011-11-19 | Remote pressure and differential pressure transmitter with temperature compensating piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329922U true CN202329922U (en) | 2012-07-11 |
Family
ID=46441900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204841760U Expired - Fee Related CN202329922U (en) | 2011-11-19 | 2011-11-19 | Remote pressure and differential pressure transmitter with temperature compensating piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329922U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155813A1 (en) * | 2021-01-20 | 2022-07-28 | 深圳市特安电子有限公司 | Remote transmission differential pressure transmitter and zeroing method |
-
2011
- 2011-11-19 CN CN2011204841760U patent/CN202329922U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022155813A1 (en) * | 2021-01-20 | 2022-07-28 | 深圳市特安电子有限公司 | Remote transmission differential pressure transmitter and zeroing method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20131119 |