DK166926B1 - METHOD AND DEVICE FOR MONITORING WATER DISCHARGERS - Google Patents
METHOD AND DEVICE FOR MONITORING WATER DISCHARGERS Download PDFInfo
- Publication number
- DK166926B1 DK166926B1 DK167587A DK167587A DK166926B1 DK 166926 B1 DK166926 B1 DK 166926B1 DK 167587 A DK167587 A DK 167587A DK 167587 A DK167587 A DK 167587A DK 166926 B1 DK166926 B1 DK 166926B1
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- DK
- Denmark
- Prior art keywords
- water
- leakage
- discharger
- vapor
- detector
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
- F16T1/48—Monitoring arrangements for inspecting, e.g. flow of steam and steam condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/02—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally
- F16T1/08—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled thermally by bimetallic strips or plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/186—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
- G01M3/188—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators for radiators
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Examining Or Testing Airtightness (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Sampling And Sample Adjustment (AREA)
Description
i DK 166926 B1in DK 166926 B1
Opfindelsen angår en fremgangsmåde til bestemmelse af driften af vandudladere under anvendelse af en vand-udladerdetektor til vurdering af en vandudladers driftstilstand og påvisning af eventuel lækage fra vandudlade-5 ren.The invention relates to a method for determining the operation of water dischargers using a water discharge detector for assessing the operating state of a water discharger and detecting any leakage from the water discharger.
Opfindelsen angår også en indretning til udførelse af fremgangsmåden omfattende en damplækagedetektor til vurdering af en vandudladers driftstilstand.The invention also relates to a device for carrying out the method comprising a vapor leakage detector for assessing the operating state of a water discharger.
En vandudlader er anbragt på dampledninger eller 10 udstyr, der anvender damp, og tillader automatisk fjernelse af opsamlet vand uden udslip af damp. Som et resultat af stigende brændstofpriser stilles der for tiden større og større krav til overvågning af damplækager. Undgåelsen af damplækage er nu blevet en forudsætning 15 for anvendelsen af vandudladere. Efter rørinstallation overvåges også vandudladerne nøje, og en vandudlader, som lækker damp, repareres eller udskiftes med det samme.A water dispenser is mounted on steam lines or vapors using steam, and allows automatic removal of collected water without the release of steam. As a result of rising fuel prices, greater and greater demands are being made for vapor leak monitoring. The avoidance of steam leakage has now become a prerequisite 15 for the use of water dischargers. After pipe installation, the water discharges are also closely monitored and a water outlet that leaks steam is repaired or replaced immediately.
Forskellige typer vandudladerdetektorer er udviklet 20 og anvendes i praksis.Various types of water discharge detectors have been developed and used in practice.
For eksempel er et inspektionsvindue tilvejebragt i rørledningen på vandudladerens udledningsside for at tillade visuel observation af et fluidums tilstand i rørledningen, og ligeledes anvendes en temperaturmåler 25 og vibrometer til måling af vandudladerens overfladetemperatur og den lyd, der forårsages af fluidumstrømmen.For example, an inspection window is provided in the pipeline on the discharge side of the water dispenser to allow visual observation of a state of fluid in the pipeline, and a temperature gauge 25 and vibrometer are also used to measure the surface temperature of the water dispenser and the sound caused by the fluid flow.
I begge tilfælde bestemtes vandudladerens lækagetilstand kun kvalitativt, og den kvantitative måling af lækage kan ikke udføres. Derfor er bedømmelsen af læ-30 kagens omfang afhængig af operatørens indsigt.In both cases, the leakage state of the water discharger was only qualitatively determined and the quantitative measurement of leakage cannot be performed. Therefore, the assessment of the extent of the cake depends on the insight of the operator.
En af de kendte detektorer beskrives i japansk patentansøgning nr. 61-57499. Denne ansøgning angår en opfindelse til detektering af damplækage på basis af en sammenhæng mellem vibrationer bestemt ved anvendelse af 35 et damptryk som en parameter og damplækagen, som er målt og lagret på forhånd ved anbringelse af en detektor med DK 166926 B1 2 indbyggede vibrations- og temperatursensorer på ydersiden af vandudladerens hus.One of the known detectors is disclosed in Japanese Patent Application No. 61-57499. This application relates to an invention for detecting vapor leakage on the basis of a relationship between vibrations determined by using a vapor pressure as a parameter and the vapor leakage which is measured and stored in advance by applying a detector with built-in vibration and temperature sensors on the outside of the water dispenser housing.
En anden indretning, der beskrives i japansk patentansøgning nr. 61-56521, er anbragt mellem damptil-5 førselssiden og vandudladeren, og damplækagen påvises ud fra en sammenhæng mellem mængden af damp, der passerer gennem en åbning, og vandniveauet på dens primærside .Another device described in Japanese Patent Application No. 61-56521 is disposed between the vapor supply side and the water discharger, and the vapor leakage is detected from a relationship between the amount of vapor passing through an orifice and the water level on its primary side.
Den ovenfor nævnte indretning er i stand til at 10 vurdere driften af hver vandudlader og at måle damplækage, men det kræver besværligt manuelt arbejde at opstille en resultatliste over driftsvurdering og lækagemåling og til opsummering af lækage samt opsummeringen og analysen af lækage udtrykt som omkostninger eller -] 5 kassationsniveau. Desuden udføres reparation eller udskiftning af en vandudlader, som lækker damp, efter kontrolleringer og kunne følgelig ikke udgøre positiv vedligeholdelse af vandudladerne.The above-mentioned device is capable of assessing the operation of each water discharger and measuring steam leakage, but it requires laborious manual work to compile a result list of operation assessment and leakage measurement and to summarize leakage as well as the summation and analysis of leakage expressed as cost or - ] 5 level of rejection. In addition, repair or replacement of a water vapor leaking vapor is performed after inspections and consequently could not constitute positive maintenance of the water vents.
FR patent 2.395.458 vedrører en indretning, som kan 20 angive driften af en vandudladers udblæsningsventil: normal, utilstrækkelig ydelse, lækage, blokering. Indretningen kan altså bl.a. angive lækage, men der er derved tale om kvalitativ angivelse, altså ikke kvantitativ angivelse i form af f.eks. mængde pr. tidsenhed.FR Patent 2,395,458 relates to a device which can indicate the operation of a water discharge exhaust valve: normal, insufficient performance, leakage, blockage. The device can thus, inter alia, indicate leakage, but this is a qualitative indication, ie not quantitative indication in the form of e.g. quantity per unit of time.
25 FR 2.117.415 angår en udblæsningsventil med en ind retning, som angiver temperaturen i ventilen kvalitativt.25 FR 2.117.415 relates to a blowout valve having a designation indicating the temperature of the valve qualitatively.
Lækage angives altså ikke kvantitativt i nogen af de to publikationer.Thus, leakage is not quantitatively indicated in either of the two publications.
30 Det tekniske problem, som ligger til grund for den foreliggende opfindelse er derfor at muliggøre den automatiske indsamling og analyse af kontroldata samt forudsigelse af reparations- eller udskiftningstidspunkt.Therefore, the technical problem underlying the present invention is to enable the automatic collection and analysis of control data as well as prediction of repair or replacement time.
Fremgangsmåden ifølge opfindelsen kendetegnes ved, 35 at lækage fra hver vandudlader måles kvantitativt, at måleresultaterne lagres i en aritmetisk indretning og DK 166926 Bl 3 overføres til en værtscomputer, som registrerer og viser summen af lækager fra samtlige vandudladere, summen og analyse af lækagen i samtlige vandudladere i forhold til forudbestemte data angående omkostningerne eller kassa-5 tion af en vandudlader på grund af dens lækage, samt enhver forandring i lækagen fra hver vandudlader med tiden.The method according to the invention is characterized in that leakage from each water discharger is quantitatively measured, that the measurement results are stored in an arithmetic device and transferred to a host computer which records and shows the sum of leaks from all water dischargers, the sum and analysis of the leakage in all water discharges relative to predetermined data on the cost or discard of a water discharger due to its leakage, as well as any change in the leakage from each water discharger over time.
Indretningen ifølge opfindelsen er kendetegnet ved, at damplækagedetektoren er i stand til at måle damp-10 lækagen fra hver vandudlader kvantitativt, at indretningen omfatter en aritmetisk indretning til lagring af måleresultaterne, og en værtscomputer, hvortil de lagrede data kan overføres, og som er indrettet til at registrere og overføre til et display summen af lækagerne 15 fra samtlige vandudladere, summen og analyse af lækagen i forhold til forudbestemte data angående omkostningerne eller kassation af en vandudlader på grund af dens lækageniveau, samt enhver forandring i lækagen fra hver vandudlader med tiden.The device according to the invention is characterized in that the vapor leakage detector is capable of quantitatively measuring the vapor leakage from each water discharge, that the device comprises an arithmetic device for storing the measurement results, and a host computer to which the stored data can be transmitted and which is arranged. to record and transfer to a display the sum of the leaks 15 from all water discharges, the sum and analysis of the leak relative to predetermined data regarding the cost or rejection of a water discharger due to its leakage level, and any change in the leak from each water discharger over time.
20 Funktionen af ovennævnte tekniske midler vil blive beskrevet i det følgende.The operation of the above technical means will be described below.
Bedømmelsen af hver vandudladers drift eller funktion og målingen af damplækage udføres ved hjælp af en damplækagedetektor. Et resultat af denne bedømmelse af 25 driften og målingen af lækage oplagres først i damplæ-kagedetektorens lagersektion og efter kontrol af alle vandudladere overføres de lagrede data til værtscomputeren.The assessment of the operation or function of each water discharger and the measurement of vapor leakage are performed by means of a vapor leakage detector. As a result of this assessment of the operation and measurement of leakage, the stored data is first stored in the storage section of the steam leak detector and after checking all water discharges the stored data is transferred to the host computer.
Værtscomputeren optager og fremviser et resultat af 30 bedømmelsen af driften af og lækagen i hver vandudlader, foretager den nødvendige summering og analyse af den totale lækage i alle udladere og lækagen udtrykt som omkostnings- og afvisningsniveau, og en forandring i lækagen i hver vandudlader med tiden.The host computer records and displays a result of the 30 assessment of the operation and leakage of each water discharger, makes the necessary summation and analysis of the total leakage in all discharges and the leakage expressed as cost and rejection level, and a change in the leakage in each water discharger over time. .
35 på denne måde kan skrivning, opsummering og analyse af et resultat af kontroller automatisk og korrekt udfø- DK 166926 B1 4 res, og følgelig kan vedligeholdelseskontrol af vandudladere let udføres. Eftersom ændringerne i lækagen med tiden registreres og vises, opnås automatisk information om tidspunkter for reparation og udskiftning ved forud-bestemmelse af tidspunktet for reparation eller udskift-5 ning på basis af lækage.In this way, writing, summarizing, and analyzing a result of controls can be performed automatically and correctly, and consequently, water discharge maintenance checks can be easily performed. As the changes in the leakage are detected and displayed over time, information about times of repair and replacement is automatically obtained by determining the time of repair or replacement based on leakage.
Manuelle operationer til input i computeren kan spares ved læsning med en stregkodelæser, og udladernummeret og typen på hver vandudlader kan være trykt på en stregkode anbragt på hver vandudlader.Manual operations for input into the computer can be saved by reading with a barcode reader, and the discharge number and type of each water dispenser can be printed on a barcode located on each water dispenser.
10 En særlig virkning, der opnås med den foreliggende opfindelse, vil nu blive belyst.A particular effect achieved with the present invention will now be elucidated.
Eftersom resultatet af kontrollerne automatisk registreres, summeres og udskrives af værtscomputeren, kan manuelt arbejde undgås, hvilket muliggør arbejdsbe-15 sparelse og standardisering.Since the results of the controls are automatically recorded, summed, and printed by the host computer, manual work can be avoided, enabling work saving and standardization.
Eftersom ændringer i damplækagen i vandudladeren med tiden optegnes og fremvises, kan endvidere defekte dele findes og repareres eller udskiftes i god tid, hvilket kan forebygge produktionsomkostningstab og bi-20 drage til energibesparelse.Furthermore, as changes in the vapor leakage in the water discharger are recorded and displayed over time, defective parts can be found and repaired or replaced in a timely manner, which can prevent production cost losses and contribute to energy savings.
Opfindelsen vil i det følgende blive nærmere forklaret i forbindelse med en foretrukken udførelsesform og under henvisning til tegningen, der skematisk viser udformningen af en indretning til overvågning af drifts-25 forhold ved vandudladere.The invention will now be described in more detail in connection with a preferred embodiment and with reference to the drawing, which schematically shows the design of a device for monitoring operating conditions of water dischargers.
Indretningen til overvågning af vandudladere ifølge den foreliggende opfindelse omfatter som vist en damp-lækagedetektor 1, en aritmetisk displayenhed 2 og en værtscomputer 3.The water discharge monitoring device of the present invention comprises, as shown, a steam leak detector 1, an arithmetic display unit 2, and a host computer 3.
30 En detektorsektion 10 for fællesdrift er udformet ved den ene ende af detektoren 1 og en stregkodelæser 11 ved den anden ende.A common operation detector section 10 is formed at one end of the detector 1 and a bar code reader 11 at the other end.
Stregkodelæseren 11 læser udladernummeret og typen og indfører disse data i en mikrocomputer 6, som indgår DK 166926 Bl 5 i den aritmetiske displayenhed 2. Et signal, der modtages ved driftsdetekteringssektionen 10, overføres til den aritmetiske displayenhed 2 via et kabel 12, forstærket ved hjælp af en analog/digitalkonverter 5 og tilfø-5 res derefter mikrocomputeren 6.The barcode reader 11 reads the shutter number and type and enters this data into a microcomputer 6 which is included in the arithmetic display unit 2. A signal received at the operating detection section 10 is transmitted to the arithmetic display unit 2 via a cable 12 amplified by of an analog / digital converter 5 and then the microcomputer 6 is applied.
Mikrocomputeren 6 beregner tilstedeværelsen eller fraværet af utætheder og lækager, viser disse data 8 på en skærmsektion 7 og lagrer samtidigt i en lagersektion 8 de data, der angår bedømmelsen af nummeret og typen, 10 driften og lækagen af hver udlader. Efter at alle vandudladerne er kontrolleret, sendes de målte data, der er lagret i lagersektionen 8, fra en datatransmittersektion 9 via et kabel 13 til værtscomputeren 3.The microcomputer 6 calculates the presence or absence of leaks and leaks, displays this data 8 on a screen section 7 and simultaneously stores in a storage section 8 the data relating to the rating of the number and type, the operation and leakage of each discharger. After all the water dischargers are checked, the measured data stored in the storage section 8 is sent from a data transmitter section 9 via a cable 13 to the host computer 3.
Værtscomputeren 3 registrerer og viser resultatet 15 af bedømmelsen af driften og lækagen i hver udlader, opsummeringen og analysen af den totale lækage i alle udladere udtrykt som omkostnings- eller kassationsniveau og ændringer i hver vandudlader med tiden.The host computer 3 records and displays the result 15 of the evaluation of the operation and leakage in each discharger, the summation and analysis of the total leakage in all dischargers expressed as cost or disposal level and changes in each water discharger over time.
Selv om den foreliggende opfindelse er beskrevet 20 ved hjælp af et eksempel og med henvisning til den medfølgende tegning, bemærkes, at forskellige ændringer og modifikationer vil være indlysende for fagfolk, og beskyttelsesomfanget, som er defineret i de efterfølgende patentkrav, omfatter sådanne ændrede og modificerede 25 udførelsesformer.Although the present invention is described by way of example and with reference to the accompanying drawings, it will be appreciated that various modifications and modifications will be apparent to those skilled in the art, and the scope of protection defined in the appended claims includes such modified and modified 25 embodiments.
Claims (3)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61087432A JPH0614381B2 (en) | 1986-04-15 | 1986-04-15 | Automatic data analyzer for steam leak data from multiple steam traps |
| JP8743286 | 1986-04-15 | ||
| JP6380486U JP2522492Y2 (en) | 1986-04-25 | 1986-04-25 | Steam trap operation determination device |
| JP6380486 | 1986-04-25 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK167587D0 DK167587D0 (en) | 1987-04-02 |
| DK167587A DK167587A (en) | 1987-10-16 |
| DK166926B1 true DK166926B1 (en) | 1993-08-02 |
Family
ID=26404927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK167587A DK166926B1 (en) | 1986-04-15 | 1987-04-02 | METHOD AND DEVICE FOR MONITORING WATER DISCHARGERS |
Country Status (25)
| Country | Link |
|---|---|
| KR (1) | KR900003201B1 (en) |
| CN (1) | CN1040467C (en) |
| AR (1) | AR247620A1 (en) |
| AT (1) | AT400069B (en) |
| AU (1) | AU586542B2 (en) |
| BE (1) | BE1001150A3 (en) |
| BR (1) | BR8701793A (en) |
| CA (1) | CA1290059C (en) |
| CH (1) | CH672829A5 (en) |
| DE (2) | DE3712406A1 (en) |
| DK (1) | DK166926B1 (en) |
| ES (1) | ES2005149A6 (en) |
| FI (1) | FI86765C (en) |
| FR (1) | FR2597189B1 (en) |
| GB (1) | GB2189321B (en) |
| GR (1) | GR870536B (en) |
| IN (1) | IN165693B (en) |
| IT (1) | IT1208631B (en) |
| LU (1) | LU86841A1 (en) |
| MX (1) | MX168788B (en) |
| NL (1) | NL189098C (en) |
| NO (1) | NO166595C (en) |
| NZ (1) | NZ219453A (en) |
| PT (1) | PT84631B (en) |
| SE (1) | SE505414C2 (en) |
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| EP0402463B1 (en) * | 1987-02-09 | 1993-04-07 | Tlv Co. Ltd. | Operation sensor of steam trap |
| GR1000336B (en) * | 1987-09-14 | 1992-06-25 | Tlv Co Ltd | Steam trap operation detector |
| DE4302367A1 (en) * | 1993-01-28 | 1994-08-04 | Rwe Energie Ag | System for the indirect determination of critical conditions of condition-dependent gases, substances, plant parts etc. |
| ES2127122B1 (en) | 1996-09-02 | 1999-12-16 | Blaquez Navarro Vicente | AUTONOMOUS ELECTRONIC IMPROVED MONITORING SYSTEM FOR PURGERS, VALVES AND INSTALLATIONS IN REAL TIME. |
| ES2133240B1 (en) * | 1997-10-03 | 2000-03-16 | Blazquez Navarro Vicente | AUTONOMOUS GLOBAL SYSTEM PERFECTED FOR REMOTE SURVEILLANCE OF BLEEDERS, VALVES AND REAL-TIME FACILITIES. |
| JP3390806B2 (en) * | 1999-12-28 | 2003-03-31 | 株式会社テイエルブイ | Position recognition device, measurement device provided with this position recognition device, and measurement system |
| JP3443618B2 (en) * | 2000-11-01 | 2003-09-08 | 株式会社テイエルブイ | Operation method of steam trap sales and maintenance system, and steam trap sales and maintenance totaling system |
| EP1836585B1 (en) * | 2004-12-08 | 2011-07-06 | Armstrong International, Inc. | Method and system for analyzing steam trap data |
| US7246036B2 (en) | 2004-12-08 | 2007-07-17 | Armstrong International, Inc. | Remote monitor for steam traps |
| CN101233544B (en) * | 2005-07-25 | 2010-05-19 | Tlv有限公司 | Device management method, analysis system used for the device management method, maintenance inspection support method and device |
| WO2007013466A1 (en) | 2005-07-25 | 2007-02-01 | Tlv Co., Ltd. | Device management method, analysis system used for the same, maintenance inspection support method, and maintenance inspection support device used for the same |
| GB2457924B (en) * | 2008-02-28 | 2012-04-25 | Spirax Sarco Ltd | Developments in or relating to steam trap monitoring |
| GB2497994B (en) * | 2011-12-30 | 2013-11-20 | Spirax Sarco Ltd | A method for monitoring a steam plant |
| GB2497997A (en) * | 2011-12-30 | 2013-07-03 | Spirax Sarco Ltd | Monitoring a steam plant |
| US9157829B2 (en) | 2011-12-30 | 2015-10-13 | Spirax-Sarco Limited | Apparatus and method for monitoring a steam plant |
| GB2497995B (en) * | 2011-12-30 | 2014-04-30 | Spirax Sarco Ltd | An apparatus and method for monitoring a steam plant |
| US10641412B2 (en) | 2012-09-28 | 2020-05-05 | Rosemount Inc. | Steam trap monitor with diagnostics |
| ES2744799T3 (en) * | 2015-04-07 | 2020-02-26 | Tlv Co Ltd | Threshold value calculation system and threshold value calculation method |
| CN111307441A (en) * | 2020-03-25 | 2020-06-19 | 广西玉柴机器股份有限公司 | Tool and method for detecting fan wind protection ring mounting bracket |
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|---|---|---|---|---|
| DE2658818A1 (en) * | 1976-12-24 | 1978-07-06 | Bea Baugesellschaft Fuer Elekt | Diagnostic computer for drive units - has A-D converter feeding data to store and operating panel pre-programming all modes of operation |
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| FR2395458A1 (en) * | 1977-06-21 | 1979-01-19 | Parisienne Chauffage Urbain | Condensate collection system for district heating installation - has electronic circuit receiving signals from temp. sensors to check correct functioning |
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-
1987
- 1987-02-21 CN CN87100824A patent/CN1040467C/en not_active Expired - Lifetime
- 1987-03-02 NZ NZ219453A patent/NZ219453A/en unknown
- 1987-03-02 IN IN155/CAL/87A patent/IN165693B/en unknown
- 1987-03-10 CA CA000531642A patent/CA1290059C/en not_active Expired - Lifetime
- 1987-03-12 AU AU69968/87A patent/AU586542B2/en not_active Expired
- 1987-03-26 NL NLAANVRAGE8700708,A patent/NL189098C/en not_active IP Right Cessation
- 1987-03-31 FI FI871398A patent/FI86765C/en not_active IP Right Cessation
- 1987-04-02 DK DK167587A patent/DK166926B1/en not_active IP Right Cessation
- 1987-04-03 GR GR870536A patent/GR870536B/en unknown
- 1987-04-03 NO NO871388A patent/NO166595C/en unknown
- 1987-04-07 PT PT84631A patent/PT84631B/en unknown
- 1987-04-08 GB GB8708403A patent/GB2189321B/en not_active Expired - Lifetime
- 1987-04-10 SE SE8701510A patent/SE505414C2/en not_active IP Right Cessation
- 1987-04-11 DE DE19873712406 patent/DE3712406A1/en active Granted
- 1987-04-11 DE DE8705444U patent/DE8705444U1/en not_active Expired
- 1987-04-13 CH CH1422/87A patent/CH672829A5/de not_active IP Right Cessation
- 1987-04-13 MX MX006007A patent/MX168788B/en unknown
- 1987-04-13 LU LU86841A patent/LU86841A1/en unknown
- 1987-04-13 AR AR87307277A patent/AR247620A1/en active
- 1987-04-13 BE BE8700391A patent/BE1001150A3/en not_active IP Right Cessation
- 1987-04-13 ES ES8701060A patent/ES2005149A6/en not_active Expired
- 1987-04-14 KR KR1019870003555A patent/KR900003201B1/en not_active IP Right Cessation
- 1987-04-14 FR FR878705305A patent/FR2597189B1/en not_active Expired - Lifetime
- 1987-04-14 IT IT8720104A patent/IT1208631B/en active
- 1987-04-14 BR BR8701793A patent/BR8701793A/en not_active IP Right Cessation
- 1987-04-15 AT AT0095287A patent/AT400069B/en not_active IP Right Cessation
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| Date | Code | Title | Description |
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| B1 | Patent granted (law 1993) | ||
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed | ||
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