CN203519233U - Balanced type diaphragm sealed pressure transmitter - Google Patents
Balanced type diaphragm sealed pressure transmitter Download PDFInfo
- Publication number
- CN203519233U CN203519233U CN201320667769.XU CN201320667769U CN203519233U CN 203519233 U CN203519233 U CN 203519233U CN 201320667769 U CN201320667769 U CN 201320667769U CN 203519233 U CN203519233 U CN 203519233U
- Authority
- CN
- China
- Prior art keywords
- cavity
- kapillary
- pressure
- filling
- diaphragm
- 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 - Lifetime
Links
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000009530 blood pressure measurement Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a balanced type diaphragm sealed pressure transmitter, which comprises a pressure testing flange, a first capillary tube, a second capillary tube and a pressure transmitting head, wherein one end of the pressure testing flange is provided with a liquid receiving diaphragm, a sealed first cavity body is formed between the liquid receiving diaphragm and the pressure testing flange, one end of the first capillary tube is communicated with the first cavity body, filling liquid is filled in the first capillary tube and the first cavity body, the other end of the first capillary tube is connected with the pressure transmitting head, the other end of the pressure testing flange is provided with a balance diaphragm, one side surface of the balance diaphragm is communicated with the atmosphere, a sealed second cavity body is formed between the other side surface of the balance diaphragm and the pressure testing flange, one end of the second capillary tube is communicated with the second cavity body, the filling liquid is filled in the second capillary tube and the second cavity body, and the other end of the capillary tube is connected with the pressure transmitting head. The balanced type diaphragm sealed pressure transmitter can eliminate the measuring error caused by temperature variations of the filling liquid, and the measuring error can be reduced by more than four times than that of the original structure.
Description
Technical field
The utility model relates to a kind of industrial automation instrument, particularly relates to a kind of for measuring the diaphragm seal pressure unit of hydrodynamic pressure.
Background technology
Diaphragm seal pressure unit is a kind of instrument and meter for automation of measuring hydrodynamic pressure at industrial circle, it is mainly comprised of pressure measurement flange, kapillary, filling liquid and pressure inverting head, one end of pressure measurement flange is provided with elastic metallic diaphragm, between elastic metallic diaphragm and pressure measurement flange, forms airtight cavity; On pressure measurement flange, there is the filling exit for filling filling liquid in airtight cavity; One end capillaceous is communicated with airtight cavity, and head is sent in other end Bonding pressure change capillaceous; Filling liquid (as silicone oil etc.) pours in airtight cavity by filling exit, when airtight cavity and kapillary are filled, filling exit is blocked.Simultaneously, for convenient, pressure measurement flange is fixed, diaphragm seal pressure unit also comprises mounting flange, on mounting flange, have groove, pressure measurement flange embeds in the groove of mounting flange, during use, by bolt, mounting flange is fixed on flange corresponding to measured position, measured medium is contacted with elastic metallic diaphragm; In addition, for kapillary is protected, diaphragm seal pressure unit also comprises protection tube, and kapillary is wrapped in protection tube.
During work, fluid acts on elastic metallic diaphragm, elastic metallic diaphragm pressurized is deformed, according to Pascal law, the partial pressure of closed container inner fluid changes, by size unchangeably to all directions transmission, and airtight cavity on kapillary and pressure measurement flange is interconnected and in air-tight state, therefore when elastic metallic diaphragm deforms, the hydrodynamic pressure that acts on elastic metallic diaphragm will be delivered to by the filling liquid in kapillary pressure inverting head, pressure inverting head converts the pressure detecting the electric signal of standard to and it is shown, so just realized the measurement of fluid pressure.
Existing diaphragm seal pressure unit exists following not enough: filling liquid variation with temperature can expand or shrink, make the volume change of filling liquid, and filling liquid volume changes meeting generation internal pressure, this power can act on the pressure-sensitive diaphragm of pressure unit, will affect measuring accuracy like this, increase measuring error.
Utility model content
The purpose of this utility model is to provide a kind of special equilibrium formula diaphragm seal pressure unit, reduces the measuring error that produces because of filling liquid temperature variation, improves measuring accuracy.
In order to solve the problems of the technologies described above, in the utility model, adopted following technical scheme:
A kind of balanced diaphragm sealing load transmitter, comprise pressure measurement flange, the first kapillary and pressure inverting head, one end of described pressure measurement flange is provided with and connects liquid film sheet, described connecing forms the first airtight cavity between liquid film sheet and pressure measurement flange, first one end capillaceous is communicated with the first cavity, and in the first kapillary and the first cavity, filled filling liquid, head is sent in the first other end Bonding pressure change capillaceous; Also comprise the second kapillary, the other end of described pressure measurement flange is provided with balance diaphragm, one side of described balance diaphragm is communicated with atmosphere, between the another side of balance diaphragm and pressure measurement flange, form the second airtight cavity, described second one end capillaceous is communicated with the second cavity, and in the second kapillary and the second cavity, filled filling liquid, head is sent in the second other end Bonding pressure change capillaceous.
Further, have for the first filling exit to the filling filling liquid of the first cavity with for the second filling exit to the filling filling liquid of the second cavity on described pressure measurement flange, described the first filling exit is communicated with the first cavity, and described the second filling exit is communicated with the second cavity.
The beneficial effects of the utility model are:
Owing to being provided with balance diaphragm on pressure measurement flange, when filling liquid expands or shrinks because of temperature variation, during the volume change of filling liquid, in the first cavity, can cancel out each other with the interior internal pressure producing of the second cavity, so just offset the most of measuring error producing because of filling liquid temperature variation, improved measuring accuracy, be proven, the comparable original structure of measuring error of the present utility model dwindles more than 4 times.
accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
embodiment 1
Referring to Fig. 1, a kind of balanced diaphragm sealing load transmitter, comprise pressure measurement flange 1, pressure inverting head 2, the first kapillary 5 and the second kapillary 6, on the end face of pressure measurement flange 1 one end, there is groove, the opening of this groove is undertaken airtightly by connecing liquid film sheet 3, thereby connect, forms the first airtight cavity between liquid film sheet 3 and pressure measurement flange 1; On pressure measurement flange 1, have the first filling exit 1a, the first filling exit 1a is communicated with the first cavity; One end of the first kapillary 5 and the channel connection that is connected the first filling exit 1a and the first cavity, the other end Bonding pressure of the first kapillary 5 becomes a positive pressure side of sending 2; On the end face of pressure measurement flange 1 other end, also have groove, the opening of this groove is undertaken airtight by balance diaphragm 4, thereby between balance diaphragm 4 and pressure measurement flange 1, forms the second airtight cavity; On pressure measurement flange 1, have the second filling exit 1b, the second filling exit 1b is communicated with the second cavity; One end of the second kapillary 6 and the channel connection that is connected second filling exit 1b the second cavity, the other end Bonding pressure of the second kapillary 6 becomes a negative pressure end that send 2; The first filling exit 1a is for to filling filling liquid in the first kapillary 5 and the first cavity, when the first kapillary 5 and the first cavity, filled after filling liquid, and the first filling exit 1a is blocked; The second filling exit 1b is for to filling filling liquid in the second kapillary 6 and the second cavity, when the second kapillary 6 and the second cavity, filled after filling liquid, and the second filling exit 1b is blocked.
The present embodiment also comprises protection tube, sealing fixed head 10, housing screw 11 and mounting flange 9, the first kapillary 5 and the second kapillary 6 are arranged in protection tube, protection tube is for shielding to the first kapillary 5 and the second kapillary 6, make the first kapillary 5 and the second kapillary 6 in identical environment temperature simultaneously, the measuring error that counteracting produces because of filling liquid temperature variation, improves measuring accuracy; One end of protection tube connects sealing fixed head 10, and sealing fixed head 10 is pressed on pressure inverting head 2 by housing screw 11, and the other end of protection tube is fixedly connected on mounting flange 9; On mounting flange 9, have for the groove of pressure measurement flange 1 is installed, pressure measurement flange is embedded in this groove, balance diaphragm 4 is communicated with protection tube simultaneously, in order to make balance diaphragm 4 be communicated with atmosphere, can on protection tube, be provided with the aperture being communicated with atmosphere, also can on sealing fixed head 10, the aperture being communicated with protection tube be set; On mounting flange 9, also have several bolts hole, during measurement, mounting flange 9 is bolted on measured position.
The protection tube of the present embodiment is comprised of little connecting pipe 7 and large connecting pipe 8, when Meter Test completes, first pressure measurement flange 1 is fixed in mounting flange 9, and then little connecting pipe 7 and large connecting pipe 8 are welded and fixed.What deserves to be explained is, because the measuring distance of the protection tube of the present embodiment is short, so the present embodiment is not suitable for telemeasurement.
The course of work of the present embodiment is as follows: first by bolt, mounting flange 9 is fixed on ring flange corresponding to measured position, make measured medium and connect liquid film sheet 3 and contact, now the pressure-acting of measured medium is in connecing liquid film sheet 3, make to connect liquid film sheet 3 pressurizeds and deform, the pressure of measured medium is delivered to pressure inverting head 2 by the filling liquid in the first kapillary 5; Meanwhile, atmospheric pressure is by acting on balance diaphragm 4, and atmospheric pressure is delivered to pressure inverting head 2 by the filling liquid in the second kapillary 6, and pressure inverting head 2, after sensing conversion, converts both pressure reduction to standard electric signal and exports and show.When causing volume change to dock liquid film sheet 3 generation internal pressures because of temperature variation in filling liquid, also can produce corresponding internal pressure to balance diaphragm 4, both anti-power of work all can be delivered on the pressure-sensitive diaphragm of pressure inverting head, due to the opposite direction of power, so just offset the most of measuring error producing because of filling liquid temperature variation.
embodiment 2
Referring to Fig. 2, the present embodiment the first kapillary 5 is separate with the passage that the first cavity is connected with the first filling exit 1a, the first kapillary 5 is communicated with the first cavity by a passage, the first filling exit 1a is communicated with the first cavity by another passage, when filling filling liquid, filling liquid pours into the first cavity by the first filling exit 1a, and then enters in the first kapillary 5 by the first cavity, when the first cavity and the first kapillary 5 are when filling, the first filling exit 1a is blocked; The present embodiment the second kapillary 6 also adopts independent setting with the passage that the second filling exit 1b is connected with the second cavity, when filling, filling liquid pours into the second cavity by the second filling exit 1b, and then enter in the second kapillary 6 by the second cavity, when the second cavity and the second kapillary 6 are filled, then the second filling exit 1b is blocked.
On the mounting flange 9 of the present embodiment, be provided with the aperture being communicated with atmosphere, on the mounting flange 9 of the present embodiment, be also provided with several bolts hole simultaneously, during use, by bolt, mounting flange 9 is fixed on ring flange corresponding to measured position, and pressure measurement flange 1 is compressed, atmosphere contacts with balance diaphragm 4 by the aperture on mounting flange 9.
The protection tube of the present embodiment is comprised of short protection tube 12, long protection tube 13 and flexible metal conduit 14; the two ends of flexible metal conduit 14 are connected in short protection tube 12 and long protection tube 13; because the measuring distance of protection tube can regulate by increasing the length of flexible metal conduit 14, so the present embodiment is suitable for telemeasurement.
Finally it should be noted that, above embodiment is only in order to the technical solution of the utility model to be described but not restriction technologies scheme, although applicant has been described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are modified to the technical solution of the utility model or are equal to replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present utility model.
Claims (2)
1. a balanced diaphragm sealing load transmitter, comprise pressure measurement flange (1), the first kapillary (5) and pressure inverting head (2), one end of described pressure measurement flange (1) is provided with and connects liquid film sheet (3), described connecing between liquid film sheet (3) and pressure measurement flange (1) forms the first airtight cavity, one end of the first kapillary (5) is communicated with the first cavity, and in the first kapillary (5) and the first cavity, filled filling liquid, head (2) is sent in the other end Bonding pressure change of the first kapillary (5), it is characterized in that, also comprise the second kapillary (6), the other end of described pressure measurement flange (1) is provided with balance diaphragm (4), one side of described balance diaphragm (4) is communicated with atmosphere, between the another side of balance diaphragm (4) and pressure measurement flange (1), form the second airtight cavity, one end of described the second kapillary (6) is communicated with the second cavity, and in the second kapillary (6) and the second cavity, filled filling liquid, head (2) is sent in the other end Bonding pressure change of the second kapillary (6).
2. balanced diaphragm sealing load transmitter according to claim 1, it is characterized in that, on described pressure measurement flange (1), have for the first filling exit (1a) to the filling filling liquid of the first cavity with for the second filling exit (1b) to the filling filling liquid of the second cavity, described the first filling exit (1a) is communicated with the first cavity, and described the second filling exit (1b) is communicated with the second cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320667769.XU CN203519233U (en) | 2013-10-28 | 2013-10-28 | Balanced type diaphragm sealed pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320667769.XU CN203519233U (en) | 2013-10-28 | 2013-10-28 | Balanced type diaphragm sealed pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203519233U true CN203519233U (en) | 2014-04-02 |
Family
ID=50378151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320667769.XU Expired - Lifetime CN203519233U (en) | 2013-10-28 | 2013-10-28 | Balanced type diaphragm sealed pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203519233U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352651A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | High-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module |
| CN107543645A (en) * | 2016-06-29 | 2018-01-05 | 云南科威液态金属谷研发有限公司 | Diaphragm pressure transmitter |
| CN108760097A (en) * | 2018-02-28 | 2018-11-06 | 南京元感微电子有限公司 | A kind of load cell |
| CN109632180A (en) * | 2019-01-07 | 2019-04-16 | 上海自动化仪表有限公司 | Isolating device for superhigh temperature pressure transmitter |
| CN110320476A (en) * | 2019-06-17 | 2019-10-11 | 中国科学院物理研究所 | The analogue battery equipment of gas is produced in situ detection liquid state batteries |
| CN115046673A (en) * | 2022-06-23 | 2022-09-13 | 浙江朗柯生物工程有限公司 | Binary package aerial fog pressure measuring equipment |
-
2013
- 2013-10-28 CN CN201320667769.XU patent/CN203519233U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352651A (en) * | 2015-12-04 | 2016-02-24 | 中国原子能科学研究院 | High-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module |
| CN107543645A (en) * | 2016-06-29 | 2018-01-05 | 云南科威液态金属谷研发有限公司 | Diaphragm pressure transmitter |
| CN108760097A (en) * | 2018-02-28 | 2018-11-06 | 南京元感微电子有限公司 | A kind of load cell |
| CN109632180A (en) * | 2019-01-07 | 2019-04-16 | 上海自动化仪表有限公司 | Isolating device for superhigh temperature pressure transmitter |
| CN110320476A (en) * | 2019-06-17 | 2019-10-11 | 中国科学院物理研究所 | The analogue battery equipment of gas is produced in situ detection liquid state batteries |
| CN115046673A (en) * | 2022-06-23 | 2022-09-13 | 浙江朗柯生物工程有限公司 | Binary package aerial fog pressure measuring equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203519233U (en) | Balanced type diaphragm sealed pressure transmitter | |
| CN102356307B (en) | Capacitive gage pressure sensor with vacuum dielectric | |
| CN205607593U (en) | Intelligence pressure transmitter with explosion -proof function | |
| CN201935774U (en) | Novel pressure and temperature sensor packaging body | |
| CN2901271Y (en) | Flange diaphragm sealed liquid level and pressure transmitter | |
| CN210243062U (en) | Dual-redundancy differential pressure sensor | |
| CN204064520U (en) | A kind of ratio-voltage pressure sensor output | |
| CN202141557U (en) | Absolute pressure gauge | |
| CN107044874B (en) | Split non-pressure-bearing ultrasonic flowmeter probe mount pad | |
| CN204269283U (en) | A kind of based on two SOI pressure core high temperature difference pressure sensor structure | |
| CN201653635U (en) | Special-purpose micro differential pressure transmitter used for gas detection | |
| CN203929309U (en) | A kind of pressure unit that detects mud pressure | |
| CN104792374A (en) | Antifreezing differential pressure type flow meter | |
| CN205120336U (en) | Device of atmospheric pressure is stabilized to wind -tunnel gauge pressure sensor | |
| CN203519240U (en) | Balanced type diaphragm sealed differential pressure transmitter | |
| CN208704955U (en) | A kind of the teletransmission component and teletransmission pressure transmitter of the double isolation diaphragms of band | |
| CN201047788Y (en) | OEM pressure sensor | |
| CN211085528U (en) | Special miniature pressure transmitter of point gum machine | |
| CN218455520U (en) | Device for realizing calibration of flange transmitter | |
| CN204461504U (en) | A kind of antifreeze differential pressure flowmeter | |
| CN210719506U (en) | Pressure gauge for measuring liquid pressure | |
| CN214667407U (en) | Oil-filled flat-film type pressure transmitter | |
| CN204831402U (en) | Integration amount of wind measuring device | |
| CN211649847U (en) | Transmitter capable of simultaneously displaying pressure and temperature | |
| CN200986488Y (en) | High temperature resistant pressure sensor with double air discharge valves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |