CN204228324U - There is the process pressure transmitter of the seal of band diamond like carbon coating - Google Patents
There is the process pressure transmitter of the seal of band diamond like carbon coating Download PDFInfo
- Publication number
- CN204228324U CN204228324U CN201420356550.2U CN201420356550U CN204228324U CN 204228324 U CN204228324 U CN 204228324U CN 201420356550 U CN201420356550 U CN 201420356550U CN 204228324 U CN204228324 U CN 204228324U
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- seals
- diamond
- carbon
- dlc coating
- 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
- 238000000034 method Methods 0.000 title claims abstract description 74
- 230000008569 process Effects 0.000 title claims abstract description 51
- 238000000576 coating method Methods 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 6
- 229910003460 diamond Inorganic materials 0.000 title description 4
- 239000010432 diamond Substances 0.000 title description 4
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 7
- 238000000151 deposition Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 238000004886 process control Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- OANFWJQPUHQWDL-UHFFFAOYSA-N copper iron manganese nickel Chemical compound [Mn].[Fe].[Ni].[Cu] OANFWJQPUHQWDL-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
Process pressure transmitter system comprises the process pressure sensor in process pressure transmitter housing, process pressure transmitter housing, the flange surface in process pressure transmitter housing and the isolation diaphragm on flange surface.First fill fluid is transported to process pressure sensor from isolation diaphragm by the first capillary channel.Procedure seals diaphragm is coupled to the process fluid of industrial process.Second fill fluid is transported to isolation diaphragm from procedure seals diaphragm by the second capillary channel.Diamond-like-carbon (DLC) coating application procedures seal membrane.
Description
Technical field
The utility model relates to process control industries.More specifically, the utility model relates to isolation diaphragm or the seal for process control instrument being coupled to process.
Background technology
The process control instrument of some types of such as pressure unit has the pressure transducer being fluidly coupled to isolation diaphragm by fill fluid.Isolation diaphragm comprises and is called " remote seals " or " membrane seal " and the sub-component part of pressure transducer and sensed corrosive process fluid being isolated.Pressure by from isolation diaphragm by substantially incoercible and fill the fill fluid in the chamber of both sides and kapillary (if or seal be directly installed to instrument, be through hole) be sent to sensor.Kapillary is normally flexible and can extends several meters.The pressure be applied in is sent to the long-range isolation diaphragm of the pressure transducer be arranged in shell of transducer by process medium contact.
Normally, any process wetted part of isolation diaphragm and remote seals is made up of corrosion-resistant material, makes process medium not damage diaphragm.In this area it is also known that provide coating on isolation diaphragm, with protective separation diaphragm from the erosion owing to contacting with process fluid.But, need Continual Improvement isolation diaphragm to protect.
Utility model content
Process pressure transmitter system comprises the process pressure sensor in process pressure transmitter housing, process pressure transmitter housing, the flange surface in process pressure transmitter housing and the isolation diaphragm on flange surface.First fill fluid is transported to process pressure sensor from isolation diaphragm by the first capillary channel.Procedure seals diaphragm is coupled to the process fluid of industrial process.Second fill fluid is transported to isolation diaphragm from procedure seals diaphragm by the second capillary channel.Diamond-like-carbon (DLC) coating application procedures seal membrane.
The utility model content and summary are provided thus introduce the selection of the design that will be described in more detail below in simplified form.The utility model content and summary are not intended to determine key feature or the essential characteristic of claimed theme, and they are also not intended to the scope being used to help to determine claimed theme.
Accompanying drawing explanation
Fig. 1 is that display is according to the rough schematic view with the transmitter of remote seals of the present utility model.
Fig. 2 A is the side sectional view marking remote seals that the line of 2A--2A intercepts, prior art in Fig. 2 B.
Fig. 2 B is the bottom plan view of the remote seals of prior art in Fig. 2 A.
Fig. 2 C is the top plan view of the remote seals of the prior art of Fig. 2 A.
Fig. 3 is the rough schematic view that display comprises the pressure transducer system of the pressure unit being coupled to remote seals.
Fig. 4 A, 4B and 4C are cut-open views, illustrate the representative configuration of diamond-like-carbon (DLC) coating being applied to isolation diaphragm.
Fig. 5 is the amplification view that display comprises a part for the process diaphragm in diamond-like-carbon (DLC) coating and middle layer.
Embodiment
The utility model relates to the membrane seal for process variable transmitter being coupled to industrial process fluid.Membrane seal comprises and is coated with diamond-like-carbon (DLC) with the isolation diaphragm of protective separation diaphragm from the damage owing to contacting with industrial process fluid.Fig. 1 illustrates the remote seals 12 of process variable transmitter 11.Remote seals 12 is connected to the transducer diaphragm in housing 14.Remote seals 12 comprises housing 17 and is configured for being coupled to process fluid 16.
According to an embodiment, the pressure of transmitter 11 measuring process medium 16.Remote seals 12 comprises the diaphragm 18 of the thin flexibility of contact process medium 16.Seal 12 also comprises the backboard 19 limiting chamber 20 together with diaphragm 18.The pressure transducer 28 be arranged in shell of transducer 14 is coupled in chamber 20 by kapillary 22, and this coupling is carried out with the enclosed fluid system be connected with sensor 28 by diaphragm 25 via shell of transducer diaphragm 25.Enclosed fluid system and chamber 20 and kapillary 22 by suitable fluid filling, for pressure process is sent to sensor 28.Fluid can comprise silicone, oil, G & W, propylene glycol and water or preferred any other suitable fluid incoercible basically.
When applying pressure process from process medium 16, diaphragm 18 moves fluid, thus measured pressure is sent to pressure transducer 28 by the passage plate 19 by pipe 22 from remote seals 12.Being applied to of producing can be that the pressure based on the pressure transducer 28 of the pressure-active element of electric capacity impels this electric capacity to change as the function of the pressure at medium 16 place.Sensor 28 can also according to other known sensing operate, such as strain gauge technique.Circuit in shell of transducer 14 converts capacitance electronic to the linear 4-20mA transmitter output signal by wire pair 30 relevant with pressure process.Can use and comprise wherein numerical information and be modulated into 4-20mA electric current
any suitable communication protocol of communication protocol, Foundation Fieldbus or Profibus communication protocol etc.Can also by using wireless communication technology implementation process control loop 30.An example of wireless communication technology is according to IEC62591
communication protocol.
Fig. 2 A is the side sectional view of remote seals 50, and Fig. 2 B is the bottom plan view of remote seals 50 and Fig. 2 C is the top plan view of remote seals 50.Remote seals 50 is called " flanged contour design ", and comprises seal housing 52.The flexible diaphragm 58 that remote seals 50 is also comprised hydraulic fluid (fill fluid) fill port 54, instrument web member 56 and welded by TIG weldment 60.The surface 62 be provided is tubular shape and extends around diaphragm 58.Bolt hole 64 for housing 52 is connected to, such as, the case of filling process fluid.
Normally, housing 52 is formed by stainless steel and has the thickness of about 1 inch.Housing 52 is processed to be soldered to circular metal diaphragm 58 in a certain way.Washer face 62 is also processed on housing 52.The paper tinsel diaphragm that diaphragm 58 normally can be cut by pressing mold and be shaped.
Fig. 3 shows the simplification block diagram that wherein process pressure sensor 28 is arranged on the pressure transducer system 10 in process pressure transmitter housing 14.As shown in Figure 3, isolation diaphragm 25 is carried on the flange surface 80 of housing 14.First capillary channel 82 transports isolation fill fluid and extends to pressure transducer 28 from diaphragm 25.Process diaphragm seal 18 is connected to process fluid, and the second capillary channel 22 transports the second fill fluid and extends to isolation diaphragm 25 from procedure seals diaphragm 18.When pressure is applied to diaphragm 18, diaphragm 18 bends.This impels pressure to be sent to isolation diaphragm 25 by the second fill fluid.Subsequently, isolation diaphragm 25 is bending and impel pressure to be sent to fill fluid in capillary channel 82.This pressure can be measured according to known Sense of Technology by pressure transducer 28.Transmitter circuit 88 is for sensing the pressure that is applied in and will relating to the information communication of the pressure be applied in another position.
Fig. 4 A, Fig. 4 B and Fig. 4 C are the side sectional views of the representative configuration of display seal 12.In figures 4 a and 4b, diamond-like-carbon (DLC) coating 90 is applied to the outside surface of diaphragm 18.In the structure of Fig. 4 A, DLC coating 90 only covers diaphragm 18.This structure will protect diaphragm 18 from wearing and tearing.This structure can reduce cost and simplify manufacture.Further, in this configuration, the welding 92 of the flange surface 94 for diaphragm 18 being welded to remote seals 12 can be carried out after coat program occurs.This simplifies manufacture process.
Fig. 4 B illustrates another representative configuration, and wherein DLC coating 90 extends on the whole wetting surfaces comprising surface 94.This provides corrosion resistance to all surface of the seal 12 of possibility contact process fluid.
Fig. 4 C is another representative configuration, and wherein DLC coating 90 is arranged on the inside surface of diaphragm 18.This structure is useful for preventing hydrogen from being permeated by diaphragm 18.In such configuration, coating 90 was applied to diaphragm 18 before diaphragm 18 is welded to flange surface 94.
Any suitable deposition techniques DLC coating 90 can be used.Such as, physical gas phase deposition technology deposited coatings can be used.Such as, filtered cathodic vacuum arc deposition equipment (FCVA) can be used to deposit DLC coating 90.In this device, electric arc is applied to cathode material, impels this materials vaporize and ionization.Magnetic filtration device field is for filtering steam, and magnetic concentrates field for formed carbon plasma being focused on the surface of the diaphragm 18 in vacuum chamber.Can by the various types of diamond-like-carbon of desired deposition.
Fig. 5 is the amplification view of a part for diaphragm 18.As shown in Figure 5, middle layer 100 is deposited between diaphragm 18 and DLC layer 90.Middle layer can be selected to promote that DLC layer 90 is attached to diaphragm 18.Middle layer 100 can be configured for improving the surfaceness of diaphragm 18 and provide the transition bed of the thermal expansivity had between diaphragm 18 and the thermal expansivity of DLC coating 90.Further, middle layer 100 can be protected the material of diaphragm 18 and improve the corrosion resistance of final structure in deposition process.Such as, pin-and-hole can be formed in DLC layer 90.Similarly, in deposition process, pin-and-hole can be formed in diaphragm 18.Diaphragm 18 is protected in this process in middle layer 100.Middle layer 100 can be selected as required.In a structure, layer 100 comprises titanium.But other examples material comprises tantalum, chromium or stupalith.
Dissimilar diamond like carbon coating fabrication layer 90 can be used.In an example embodiment, DLC layer 90 comprises the diamond like carbon coating containing a-C:H (amorphous hydrogenated diamond-like-carbon).In another preferred embodiment, coating comprises ta-C (tetrahedron diamond-like-carbon) coating.
Although be described the utility model with reference to preferred embodiment, those skilled in the art will recognize that the change can carried out when not departing from essence of the present utility model and scope in form and details.Remote seals can be the structure except those structures described particularly herein.Example comprises flanged seal type, such as contour lip seal, the flanged seal stretched out or pie seal.Other structure comprises threaded closure (RTW), joint for pipe seal, chemical T-shaped seal, threaded line pipe installation seal, saddle and flows through seal etc.Capillary channel 22 can be elongated, as shown in Figure 1, or, in another representative configuration, can be relatively short, transmitter is directly installed to seal whereby.In a structure, diaphragm 18 comprises stainless steel.Other examples material comprises
tantalum, titanium, nickel 200/201, alloy 400 (Monel
tM), alloy 625 and 600 (inconel
tM), super-duplex stainless steel 2507, zirconium, gold, silver, platinum, nickel-base alloy, refractory metal and noble metal.In a structure, any be welded on deposition DLC coating before perform.This guarantees that welding process does not damage DLC coating.The thickness of DLC coating can be selected as required.Such as, thickness can between 0.5 and 5 μm.In some constructions, as long as its satisfied application requires preferred thinner layer.Although show single middle layer, can by any amount of middle layer of desired use.
Claims (18)
1. a process pressure transmitter system, is characterized in that, comprising:
Process pressure transmitter housing;
Process pressure sensor, described process pressure sensor is in process pressure transmitter housing;
Flange surface, shown flange surface is in process pressure transmitter housing;
Isolation diaphragm, described isolation diaphragm is on flange surface;
First capillary channel, the first fill fluid is transported to process pressure sensor from isolation diaphragm by described first capillary channel;
Procedure seals diaphragm, described procedure seals diaphragm construction becomes to be coupled to the process fluid of industrial process;
Second capillary channel, the second fill fluid is transported to isolation diaphragm from procedure seals diaphragm by described second capillary channel; With
Diamond-like-carbon DLC coating, described diamond-like-carbon DLC coating application procedures seal membrane.
2. system according to claim 1, is characterized in that, described diamond-like-carbon is tetrahedron diamond-like-carbon.
3. system according to claim 1, is characterized in that, described diamond-like-carbon is amorphous hydrogenated diamond-like carbon.
4. system according to claim 1, is characterized in that, is included in the middle layer between DLC coating and procedure seals diaphragm.
5. system according to claim 4, is characterized in that, described middle layer is titanium.
6. system according to claim 4, is characterized in that, described middle layer is tantalum.
7. system according to claim 4, is characterized in that, described middle layer is chromium.
8. system according to claim 4, is characterized in that, described middle layer is pottery.
9. system according to claim 1, is characterized in that, described DLC coating is applied to the outside surface of procedure seals diaphragm.
10. system according to claim 1, is characterized in that, described DLC coating is applied to the inside surface of procedure seals diaphragm.
11. systems according to claim 1, is characterized in that, described procedure seals diaphragm is carried in remote seals and described DLC coating extends on the surface of remote seals.
12. 1 kinds of remote seals process pressure transmitter being coupled to process fluid, is characterized in that, comprising: procedure seals diaphragm, described procedure seals diaphragm construction becomes to be coupled to the process fluid of industrial process;
Capillary channel, fill fluid is transported to far-end from procedure seals diaphragm by described capillary channel; With
Diamond-like-carbon DLC coating, described diamond-like-carbon DLC coating application procedures seal membrane.
13. remote seals according to claim 12, is characterized in that, described diamond-like-carbon is tetrahedron diamond-like-carbon.
14. remote seals according to claim 12, is characterized in that, are included in the middle layer between DLC coating and procedure seals diaphragm.
15. remote seals according to claim 14, is characterized in that, described middle layer is titanium.
16. remote seals according to claim 12, is characterized in that, described DLC coating is applied to the outside surface of procedure seals diaphragm.
17. remote seals according to claim 12, is characterized in that, described DLC coating is applied to the inside surface of procedure seals diaphragm.
18. remote seals according to claim 12, is characterized in that, described DLC coating extends on the surface of remote seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420356550.2U CN204228324U (en) | 2014-06-30 | 2014-06-30 | There is the process pressure transmitter of the seal of band diamond like carbon coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420356550.2U CN204228324U (en) | 2014-06-30 | 2014-06-30 | There is the process pressure transmitter of the seal of band diamond like carbon coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204228324U true CN204228324U (en) | 2015-03-25 |
Family
ID=52926404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420356550.2U Expired - Lifetime CN204228324U (en) | 2014-06-30 | 2014-06-30 | There is the process pressure transmitter of the seal of band diamond like carbon coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204228324U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203252A (en) * | 2014-06-30 | 2015-12-30 | 罗斯蒙特公司 | Process pressure transmitter possessing sealing component with diamond-like carbon coating |
| CN107796555A (en) * | 2017-09-23 | 2018-03-13 | 南京律智诚专利技术开发有限公司 | A kind of high temperature pressure transmitter |
-
2014
- 2014-06-30 CN CN201420356550.2U patent/CN204228324U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203252A (en) * | 2014-06-30 | 2015-12-30 | 罗斯蒙特公司 | Process pressure transmitter possessing sealing component with diamond-like carbon coating |
| CN107796555A (en) * | 2017-09-23 | 2018-03-13 | 南京律智诚专利技术开发有限公司 | A kind of high temperature pressure transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |