CA1290059C - Steam trap operation judging device - Google Patents
Steam trap operation judging deviceInfo
- Publication number
- CA1290059C CA1290059C CA000531642A CA531642A CA1290059C CA 1290059 C CA1290059 C CA 1290059C CA 000531642 A CA000531642 A CA 000531642A CA 531642 A CA531642 A CA 531642A CA 1290059 C CA1290059 C CA 1290059C
- Authority
- CA
- Canada
- Prior art keywords
- steam
- leakage
- steam trap
- trap
- traps
- 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
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- 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)
Abstract
ABSTRACT
The present invention is designed to transmit to a host computer a result of judgement of operation of each steam trap and measurement of steam leakage, to automatically totalize and analyze the result of measurements, and to predict the time to repair or replace.
The present invention is designed to transmit to a host computer a result of judgement of operation of each steam trap and measurement of steam leakage, to automatically totalize and analyze the result of measurements, and to predict the time to repair or replace.
Description
TITLE OF T~E INVENTION:
STE~M TRAP OPERATION JUDGING DEVICE
B~CKGROUND OF THE INVENTION:
1. Field of -the Invention:
The present invention relates to a steam trap operation judging device which judges -the operating condition of steam traps, that is, whether or not the steam traps are leaking steam, or measures the leakage of steam.
The steam trap is mounted on steam lines or equipment using steam and permits only the au-tomatic removal of collected water without the leakage of steam.
More and more strict observation of steam leaks has come to be required as a result of a rise in fuel-cost.
Leaking no steam has now become a prerequisite for the adoption o~ the steam trap. Steam-pipe lines, after ins-tallation, are strictly monitored; and a steam trap which is leaking steam is repaired or replaced positively.
There have been developed and put to practical use various types of steam trap leakage detec-tors.
For ins-tance, a sight window is provided in the pipe line on -the outlet side of the steam trap to allow the visual observation of the sta-te of a fluid inside, and al50 a temperature gauge and vibrometer are employed to measure the surface temperature of the steam trap and the sound of flow of the fluid.
In either case, only the qualitative observation was made on the leaking state of the steam trap and the quantitative measuremenk of leakage could not be made.
Therefore, the judgment of the degree of leakage had to be dependent on man's sense.
STE~M TRAP OPERATION JUDGING DEVICE
B~CKGROUND OF THE INVENTION:
1. Field of -the Invention:
The present invention relates to a steam trap operation judging device which judges -the operating condition of steam traps, that is, whether or not the steam traps are leaking steam, or measures the leakage of steam.
The steam trap is mounted on steam lines or equipment using steam and permits only the au-tomatic removal of collected water without the leakage of steam.
More and more strict observation of steam leaks has come to be required as a result of a rise in fuel-cost.
Leaking no steam has now become a prerequisite for the adoption o~ the steam trap. Steam-pipe lines, after ins-tallation, are strictly monitored; and a steam trap which is leaking steam is repaired or replaced positively.
There have been developed and put to practical use various types of steam trap leakage detec-tors.
For ins-tance, a sight window is provided in the pipe line on -the outlet side of the steam trap to allow the visual observation of the sta-te of a fluid inside, and al50 a temperature gauge and vibrometer are employed to measure the surface temperature of the steam trap and the sound of flow of the fluid.
In either case, only the qualitative observation was made on the leaking state of the steam trap and the quantitative measuremenk of leakage could not be made.
Therefore, the judgment of the degree of leakage had to be dependent on man's sense.
2. Description of the Prior Art:
This applicant, therefore, developed simple steam trap leakage detectors.
One of the detectors is described in Canadian Patent Application Ser. No. 531,724 filed March 11, 1987 (see also U.S. Patent No. 4,727,750). This is an inven-tion for determining steam leakage on the basis of a correlation between vibrations by using a steam pressure as a parameter and the steam leakage that have been measured and stored in advance by applying a detector including a vibration sensor and a temperature sensor that are built in, to the outside surface of a casing of the steam trap.
The other device proposed âS Japanese Patent Publication No. 62 212525 is disposed between the steam supply side and the steam trap, and -the steam leakage is determined from a correlation between the quantity of steam passing through an orifice and a water level on its primary side.
The aforementioned device is capable of judging the operation of each steam trap and measuring steam leakage, but troublesome manual operation is required for the prepara-tion of a list of results of operation judgment and leakage measurement, and for the summation of leakage and the totali-zation and analysis of leakage in terms of the amount of money or rejection rate. In addition, repair or replacement of a trap which leaks steam is carried out after checkups, and accordingly could not be positive maintenance of the steam traps.
According to a broad aspect of the present inven-tion there is provided a steam trap operation sensing device which comprises steam leakage detector means for measuring and storing data representing the operation of steam traps, and host computer means to which said data are transferred for storing the data. The host computer means operates to record and display the summation of leakage in a plurality of steam traps, the totalization and analysis of leakage in terms of at least one of monetary cost and a rejectïon rate.
The changes in each of the steam traps with time is also recorded. The steam leakage detector means comprises an operating detecting section for sensing parameters of a plurality of steam traps to generate analog signals. An analog-to-digital converter is connected to the operation detecting section for converting the analog signals to digital signals. A microcomputer is connected to the analog-to-digital converter for receiving the digital signals and for analyzing the digital signals to detect the presence of steam leaks in each steam trap based on the parameters sensed for each steam trap. Storage means is connected to the microcomputer for storing data concerning the condition and change in condition of each steam trap with regard to steam leakage.
The invention also envisages means for correlating the digital signals for each steam trap with a code repre-senting each of the steam traps.
SUMMARY OF THE INVENTION:
The technical task of the present invention, there-fore, is to enable the automatic totalization and analysis of checkup data and the prediction of a repair or replacement period.
A technological means of the present invention disclosed for the solution of the aforementioned problem is such a device that the operation of each trap is judged and the steam leakage is measured and stored by means of a steam leakage detector; the aforesaid data stored are transmitted to a host computer, which records and displays a result of the judgment of operation and leakage of each trap, summation and analysis of total leakage at all traps and the leakage in terms of the amount of money or a rejection rate, and a change in each - 3a -~29~
steam trap with time.
The function of the aforementioned technological means is as described below.
The judgement of operation of each steam trap and the measurement of steam leakage are performed by the steam leakage detector. A result of this judyement of operation and measurement of leakage is once stored in the storage section of the steam leakage detector, and after the check of all steam traps, the data stored are transmitted -to the host computer.
The host computer records and displays a result of judgement of operation of, and leakage at, each steam trap, necessary totalization and analysis of the total leakage a-t all traps and leakage in terms of the amount of money and rejection rate, and a change in the leakage at each steam trap with time.
ThereEore, printing, totalization and analysis of a resul-t of checkups can automatically and correctly be carried out and accordingly the main-tenance control of steam traps can easily be performed. Also, as -the change of leakage with time is recorded and displayed, the time of repair or replacement can automatically be known by predetermining the time of repair or replacement on the basis of leakage.
Manual labour for inputting into the computer .~
s~
can be saved by reading, with a bar-code reading, the trap number and type oE each steam trap printed on a bar-code attached on each steam trap.
The present invention has the following peculiar effec-t.
Since a result of checkups is automatically recorded, totalized and printed by -the host computer, manual work can be dispensed with, enabling work saving and standardization.
Furthermore, since changes in steam leakage at -the steam trap with time are recorded and displayed, early finding defective parts and repairing or replacing them can prevent the waste of production cost, contributing toward energy saving.
BRIEF DESCRIPTION OF THE l)RAWING:
Fig. 1 is a schema-tic drawing showing the cons-titution of a steam -trap operation judging device of the present invention.
DETAILED DESCRIPTION OF THE PREFFERED EMBODIMENT:
An example showing an embodiment of the aforesaid -technological means is described below. (See Fig. 1.) The steam trap operation judging device of the present invention cornprises a steam leakage detector 1, an arithmetic display device 2 and a host computer 3.
~9~5~
A trap operation detecting section 10 is formed at one end of the detector 1 and a bar-code reader 11 at the other end.
The bar-code reader 11 reads the trap number and type an inputs them into a microcomputer 6 of the arithmetic d.isplay device 2. A signal received by the operation detecting section 10 is transmitted to the arithmetic display device through a cable 12, ampliied by an amplifier 4, digitally converted by an analog/digital con~erter 5, and then fed into the microcomputer 6.
The microcomputer 6 computes the presence or absence of leaks and the leakage, displays on the display sec-tion 7 and, at the same time, s-tores in a storage section 8 the data regarding the judgement of the number and type, operation, and leakage of each trap. After the check of all steam traps, the da-ta of measurement stored in -the storage section 8 are sent to the host computer 3 from a data transmitter section 9 through a cable 13.
The host computer 3 records and displays a result of judgement of operation and leakage of each trap, summation and analysis of total leakage of all traps and leakage in -terms o~ the amount of money or rejection rate, and changes.in each steam -trap with time.
Although the present inven-tion has been fully ~2~
described by way of examples with reference to the-accompanying drawings, it is to be noted that varivus changes and modifications will be apparent to those skilled in -the art. ThereEore, unless otherwise such changes and modifications depar-t from the scope of the present invention, they should be construed as included therein.
;
This applicant, therefore, developed simple steam trap leakage detectors.
One of the detectors is described in Canadian Patent Application Ser. No. 531,724 filed March 11, 1987 (see also U.S. Patent No. 4,727,750). This is an inven-tion for determining steam leakage on the basis of a correlation between vibrations by using a steam pressure as a parameter and the steam leakage that have been measured and stored in advance by applying a detector including a vibration sensor and a temperature sensor that are built in, to the outside surface of a casing of the steam trap.
The other device proposed âS Japanese Patent Publication No. 62 212525 is disposed between the steam supply side and the steam trap, and -the steam leakage is determined from a correlation between the quantity of steam passing through an orifice and a water level on its primary side.
The aforementioned device is capable of judging the operation of each steam trap and measuring steam leakage, but troublesome manual operation is required for the prepara-tion of a list of results of operation judgment and leakage measurement, and for the summation of leakage and the totali-zation and analysis of leakage in terms of the amount of money or rejection rate. In addition, repair or replacement of a trap which leaks steam is carried out after checkups, and accordingly could not be positive maintenance of the steam traps.
According to a broad aspect of the present inven-tion there is provided a steam trap operation sensing device which comprises steam leakage detector means for measuring and storing data representing the operation of steam traps, and host computer means to which said data are transferred for storing the data. The host computer means operates to record and display the summation of leakage in a plurality of steam traps, the totalization and analysis of leakage in terms of at least one of monetary cost and a rejectïon rate.
The changes in each of the steam traps with time is also recorded. The steam leakage detector means comprises an operating detecting section for sensing parameters of a plurality of steam traps to generate analog signals. An analog-to-digital converter is connected to the operation detecting section for converting the analog signals to digital signals. A microcomputer is connected to the analog-to-digital converter for receiving the digital signals and for analyzing the digital signals to detect the presence of steam leaks in each steam trap based on the parameters sensed for each steam trap. Storage means is connected to the microcomputer for storing data concerning the condition and change in condition of each steam trap with regard to steam leakage.
The invention also envisages means for correlating the digital signals for each steam trap with a code repre-senting each of the steam traps.
SUMMARY OF THE INVENTION:
The technical task of the present invention, there-fore, is to enable the automatic totalization and analysis of checkup data and the prediction of a repair or replacement period.
A technological means of the present invention disclosed for the solution of the aforementioned problem is such a device that the operation of each trap is judged and the steam leakage is measured and stored by means of a steam leakage detector; the aforesaid data stored are transmitted to a host computer, which records and displays a result of the judgment of operation and leakage of each trap, summation and analysis of total leakage at all traps and the leakage in terms of the amount of money or a rejection rate, and a change in each - 3a -~29~
steam trap with time.
The function of the aforementioned technological means is as described below.
The judgement of operation of each steam trap and the measurement of steam leakage are performed by the steam leakage detector. A result of this judyement of operation and measurement of leakage is once stored in the storage section of the steam leakage detector, and after the check of all steam traps, the data stored are transmitted -to the host computer.
The host computer records and displays a result of judgement of operation of, and leakage at, each steam trap, necessary totalization and analysis of the total leakage a-t all traps and leakage in terms of the amount of money and rejection rate, and a change in the leakage at each steam trap with time.
ThereEore, printing, totalization and analysis of a resul-t of checkups can automatically and correctly be carried out and accordingly the main-tenance control of steam traps can easily be performed. Also, as -the change of leakage with time is recorded and displayed, the time of repair or replacement can automatically be known by predetermining the time of repair or replacement on the basis of leakage.
Manual labour for inputting into the computer .~
s~
can be saved by reading, with a bar-code reading, the trap number and type oE each steam trap printed on a bar-code attached on each steam trap.
The present invention has the following peculiar effec-t.
Since a result of checkups is automatically recorded, totalized and printed by -the host computer, manual work can be dispensed with, enabling work saving and standardization.
Furthermore, since changes in steam leakage at -the steam trap with time are recorded and displayed, early finding defective parts and repairing or replacing them can prevent the waste of production cost, contributing toward energy saving.
BRIEF DESCRIPTION OF THE l)RAWING:
Fig. 1 is a schema-tic drawing showing the cons-titution of a steam -trap operation judging device of the present invention.
DETAILED DESCRIPTION OF THE PREFFERED EMBODIMENT:
An example showing an embodiment of the aforesaid -technological means is described below. (See Fig. 1.) The steam trap operation judging device of the present invention cornprises a steam leakage detector 1, an arithmetic display device 2 and a host computer 3.
~9~5~
A trap operation detecting section 10 is formed at one end of the detector 1 and a bar-code reader 11 at the other end.
The bar-code reader 11 reads the trap number and type an inputs them into a microcomputer 6 of the arithmetic d.isplay device 2. A signal received by the operation detecting section 10 is transmitted to the arithmetic display device through a cable 12, ampliied by an amplifier 4, digitally converted by an analog/digital con~erter 5, and then fed into the microcomputer 6.
The microcomputer 6 computes the presence or absence of leaks and the leakage, displays on the display sec-tion 7 and, at the same time, s-tores in a storage section 8 the data regarding the judgement of the number and type, operation, and leakage of each trap. After the check of all steam traps, the da-ta of measurement stored in -the storage section 8 are sent to the host computer 3 from a data transmitter section 9 through a cable 13.
The host computer 3 records and displays a result of judgement of operation and leakage of each trap, summation and analysis of total leakage of all traps and leakage in -terms o~ the amount of money or rejection rate, and changes.in each steam -trap with time.
Although the present inven-tion has been fully ~2~
described by way of examples with reference to the-accompanying drawings, it is to be noted that varivus changes and modifications will be apparent to those skilled in -the art. ThereEore, unless otherwise such changes and modifications depar-t from the scope of the present invention, they should be construed as included therein.
;
Claims (4)
1. A steam trap operation sensing device comprising steam leakage detector means for measuring and storing data representing the operation of steam traps, and host computer means to which said data are transferred for storing said data, said host computer means operating to record and display the summation of leakage in a plurality of steam traps, the totalization and analysis of leakage in terms of at least one of monetary cost and a rejection rate; and changes in each of said steam traps with time, said steam leakage detector means comprising an operation detecting section for sensing parameters of a plurality of steam traps to generate analog signals, an analog-to-digital converter connected to said operation detecting section for converting the analog signals to digital signals, a microcomputer connected to said analog-to-digital converter for receiving the digital signals and for analyzing the digital signals to detect the presence of steam leaks in each steam trap based on the parameters sensed for each steam trap, and storage means connected to said microcomputor for storing data concerning the condition and change in condition of each steam trap with regard to steam leakage.
2. A steam trap operation sensing device according to claim 1 wherein there is further provided means for correlat-ing said digital signals for each steam trap with a code representing each said steam trap.
3. A steam trap operation sensing device according to claim 1 or 2, wherein at least one of the parameters is vibration sensed for each steam trap, said microcomputer being programmed to recognize a pattern of vibrations indicative of a steam leak in each steam trap.
4. A steam trap operation sensing device according to claim 1 or 2, wherein said steam leakage detector means including a display section connected to said microcomputer for displaying the summation of leakage in the plurality of steam traps, and a data transmitter section connected between said microcomputer and said host computer means for trans-ferring data from said microcomputer and from said storage means to said host computer means.
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 |
| JP61-87432 | 1986-04-15 | ||
| JP61-63804 | 1986-04-25 | ||
| JP6380486U JP2522492Y2 (en) | 1986-04-25 | 1986-04-25 | Steam trap operation determination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1290059C true CA1290059C (en) | 1991-10-01 |
Family
ID=26404927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000531642A Expired - Lifetime CA1290059C (en) | 1986-04-15 | 1987-03-10 | Steam trap operation judging device |
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) | DE8705444U1 (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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|---|---|---|---|---|
| JPS62212542A (en) * | 1986-03-14 | 1987-09-18 | Tlv Co Ltd | Apparatus for measuring leak quantity of steam |
| US4898022A (en) * | 1987-02-09 | 1990-02-06 | Tlv Co., Ltd. | Steam trap operation detector |
| 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 |
| WO2006063196A2 (en) * | 2004-12-08 | 2006-06-15 | 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 |
| JP5010472B2 (en) | 2005-07-25 | 2012-08-29 | 株式会社テイエルブイ | Maintenance inspection support device |
| CN101238491B (en) * | 2005-07-25 | 2011-11-02 | Tlv有限公司 | Device management method, analysis system used for the device management method, data structure used in management database, and maintenance inspection support device used for the device management me |
| GB2457924B (en) * | 2008-02-28 | 2012-04-25 | Spirax Sarco Ltd | Developments in or relating to steam trap monitoring |
| 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 |
| 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 |
| US10641412B2 (en) | 2012-09-28 | 2020-05-05 | Rosemount Inc. | Steam trap monitor with diagnostics |
| EP3282167B1 (en) * | 2015-04-07 | 2019-06-12 | TLV Co., Ltd. | Threshold value calculation system, and threshold value calculation method |
| CN111307441B (en) * | 2020-03-25 | 2024-08-27 | 广西玉柴机器股份有限公司 | Tool and method for detecting fan protection ring mounting bracket |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US4202490A (en) * | 1977-01-03 | 1980-05-13 | Hughes Tool Company | Drill pipe identification method and system |
| 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 |
| US4184205A (en) * | 1977-11-25 | 1980-01-15 | Ird Mechanalysis, Inc. | Data acquisition system |
| US4249697A (en) * | 1979-06-25 | 1981-02-10 | Savage Harlow D Jr | Steam trap monitor |
| DE3030296A1 (en) * | 1980-08-09 | 1982-03-18 | Reinhold Ing.(grad.) 6990 Bad Mergentheim Barlian | DEVICE FOR DETECTING STEAM LEAKAGE |
| JPS58168934A (en) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | Method and device for detecting leakage of liquid |
| AT387464B (en) * | 1982-10-29 | 1989-01-25 | Voest Alpine Ag | ARRANGEMENT FOR MONITORING THE LEVEL OF DAMAGE DUE TO MATERIAL EXHAUST IN CONSTRUCTIONS, VEHICLES, MACHINES AND THE LIKE |
| JPS62212542A (en) * | 1986-03-14 | 1987-09-18 | Tlv Co Ltd | Apparatus for measuring leak quantity of steam |
| JPH06157499A (en) * | 1992-11-16 | 1994-06-03 | Kumiai Chem Ind Co Ltd | N-@(3754/24)1-substituted ethyl)-2,2-dichlorocyclopropane carboxamide derivative and germicide for agriculture and horticulture |
| JPH06156521A (en) * | 1992-11-27 | 1994-06-03 | Hitachi Ltd | Carrying box for transporting large products |
-
1987
- 1987-02-21 CN CN87100824A patent/CN1040467C/en not_active Expired - Lifetime
- 1987-03-02 IN IN155/CAL/87A patent/IN165693B/en unknown
- 1987-03-02 NZ NZ219453A patent/NZ219453A/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 DE8705444U patent/DE8705444U1/en not_active Expired
- 1987-04-11 DE DE19873712406 patent/DE3712406A1/en active Granted
- 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 LU LU86841A patent/LU86841A1/en unknown
- 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 ES ES8701060A patent/ES2005149A6/en not_active Expired
- 1987-04-14 KR KR1019870003555A patent/KR900003201B1/en not_active Expired
- 1987-04-14 IT IT8720104A patent/IT1208631B/en active
- 1987-04-14 FR FR878705305A patent/FR2597189B1/en not_active Expired - Lifetime
- 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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