EP3837462A1 - Method for monitoring valves - Google Patents
Method for monitoring valvesInfo
- Publication number
- EP3837462A1 EP3837462A1 EP19722527.9A EP19722527A EP3837462A1 EP 3837462 A1 EP3837462 A1 EP 3837462A1 EP 19722527 A EP19722527 A EP 19722527A EP 3837462 A1 EP3837462 A1 EP 3837462A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- valve
- sensor signals
- signals
- pressure cylinder
- 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.)
- Pending
Links
Classifications
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
- F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/58—Pipe-line systems
- A62C35/68—Details, e.g. of pipes or valve systems
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0058—Optical means, e.g. light transmission, observation ports
-
- 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
- G01M3/2876—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 for valves
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
Definitions
- the subject relates to a method for monitoring valves and / or
- valves must be subjected to at least a visual inspection at regular maintenance intervals. This results from the high requirements for the availability of these safety-relevant components and from the relevant standards and regulations.
- a service technician must inspect each individual valve to ensure that the valves are also functional in the event of a fire. This also applies to pressure cylinders that are permanently filled with extinguishing liquid. This maintenance effort is time and cost intensive.
- the inspection described does not always ensure that the valves are actually functional in the event of a fire. Between two maintenance intervals, a valve and / or pressure cylinder may suffer a defect. Such a defect is only detected during the next inspection. If a fire occurs between the time of the defect and the inspection, it may happen that the valve or pressure cylinder in question is not functional and that fire fighting is difficult.
- the object of the object was to increase the functional reliability of valves and / or pressure cylinders, in particular in fire-fighting systems. Another task was to determine the distances between two
- valves and / or pressure cylinders generally lead to changes in features which characterize the valve and / or the pressure cylinder.
- Such features can relate to the external appearance of the valve, for example.
- incrustations can occur around the leak, which can be recognized by an optical inspection.
- Color changes to the valve and / or the valve may also occur in the area of a leak
- Pressure cylinders occur or the reflection behavior of the material of the valve can change.
- the vibration and oscillation behavior when understanding a valve by motor can e.g. in the case of incrustations or other mechanical defects within the valve body compared to an intact valve. Due to increased friction due to a defect, a temperature profile on a valve or on its motor can possibly be changed compared to an intact valve. Due to an increased torque during the understanding of the valve, a servomotor arranged on a defective valve takes on a servomotor on an intact valve
- a valve may not be able to be moved completely to its end position or may not move back to its starting position.
- first sensor signals In order to be able to determine whether a valve and / or pressure cylinder is defective, it is proposed that a sensor on the valve and / or pressure cylinder detect the first sensor signals in the intact state. These first sensor signals are read in for each sensor and the monitoring is taught in with these first sensor signals. This means that for the monitoring there are first sensor signals from a valve and / or pressure cylinder with which the valve and / or the pressure cylinder can be identified as intact. First sensor signals can be detected by one or different sensors. If first sensor signals are detected by sensors that are different from one another, errors can occur on the valve and / or the pressure cylinder
- valve and / or the pressure cylinder can be checked at any later point in time by detecting second sensor signals on the valve and / or the pressure cylinder in an unknown state with the sensor.
- the same sensor with which the first sensor signals were recorded measures the valve and / or the pressure cylinder in an unknown state.
- An unknown state is always present when a time has passed between the last inspection and the current reading in of the second sensor signals.
- the second sensor signals can also be detected by sensors different from one another.
- a signal can be output. This signal can be used to initiate a manual inspection of the valve and / or to issue a warning signal. As part of this manual inspection, it can be checked on the valve and / or the pressure cylinder whether this is actually defective and an exchange or repair can be arranged.
- a combination of sensor signals from different sensors can be useful.
- a joint, possibly weighted evaluation of the sensor signals from different sensors can take place, so that changes to different ones
- the objective evaluation can make sense. It is proposed that when the sensor signals are evaluated, if a limit value is exceeded, which may be less than the limit value mentioned above, a maintenance signal is already output. The deviation of the sensor signals can be an indication of wear without the valve and / or the pressure cylinder is actually broken. Maintenance can thus take place before a defect occurs, so that the reliability of the component is further increased. If a defect is mentioned below, what has been said there can also apply to wear and tear without the component already being defective.
- the sensor signals recorded with the sensors can be very different.
- a sound sensor In particular, a sound sensor, an image sensor, a thermal sensor, a
- Vibration sensor a moisture sensor, a pressure sensor, a current sensor and / or a position sensor can be used alone or in combination with any other of these sensors.
- a valve can be controlled by a motor and the valve can thereby be adjusted by a motor.
- a valve is adjusted for maintenance purposes, e.g. at intervals, in particular to prevent incrustations.
- a mechanical property of the valve can be detected with a sound sensor and / or a vibration sensor. Vibration and / or structure-borne noise can occur on valves
- Incrustations or other mechanical defects may be changed compared to those valves that are intact.
- Vibration sensor can detect vibrations and noises on the valve. These can be compared with the learned first sensor signals and a defective valve can be identified.
- valve box As a rule, a valve is housed in a valve cabinet (valve box).
- valve cabinet valve box
- a pressure cylinder can also be in a housing, e.g. a technical room is enclosed. If an image of the valve and / or the
- this image may already show information about a change in the valve and / or the pressure cylinder.
- the outer skin of the valve and or of the pressure cylinder may already show information about a change in the valve and / or the pressure cylinder.
- Changes are visually recognizable.
- An image recorded with the image sensor shows these changes and thus enables a defective valve and / or to be detected Pressure cylinder.
- the changes can be detected visually on a monitor or by means of suitable digital image processing.
- the image sensor can be arranged inside the valve cabinet, the housing.
- the image sensor can be arranged on the outside of the valve cabinet / the housing and to be guided into the housing in the manner of an endoscope through an opening, in particular a bore into the interior of the valve cabinet.
- the interior of the valve cabinet or the housing can then be captured by a camera arranged on the outside of the valve cabinet or the housing.
- the opening can be closed moisture-tight, e.g. via a circumferential seal, in particular a sealing lip, e.g. a rubber seal.
- the material of the seal can be formed in such a way that it increases its volume, in particular swells, under the influence of water and / or at elevated temperatures, so that in the event of a fire the interior of the valve cabinet and the housing can be securely sealed from the exterior.
- the seal can be arranged inside and / or outside of the opening and / or in the region of the inner wall of the opening.
- the image sensor can be mobile. This makes it possible to examine several valve cabinets / housings sequentially with one system.
- the system can be inserted into the opening provided by maintenance personnel. This can be designed so that the viewing angle of the optical sensor in the housing is always exactly the same.
- Temperature in the valve, its motor and / or the supply line to the motor can be done, for example, with a thermal sensor, in particular an infrared sensor
- valve and / or the pressure cylinder are in particular in a protected environment, for example the valve box (housing, housing), then leaks can also be detected by a moisture sensor.
- extinguishing fluid for example water
- the extinguishing fluid is also present at the outlet of the valve in wet systems.
- a leakage point in the valve can also be detected with a moisture sensor at the outlet of the valve, since moisture then passes through the valve from its possibly wet inlet to the otherwise dry outlet.
- the current consumption of the servomotor on the valve can be recorded when it adjusts the valve. Due to increased friction, which can occur, for example, through incrustations, there is an increased torque, which leads to an increased current consumption of the motor. This can be detected with the help of the current sensor.
- a position sensor can be a limit switch, a proximity sensor, e.g. an inductive proximity sensor or the like. Encrusting or other mechanical impairments can result in the valve not being able to be fully opened and / or completely closed and the valve thus not reaching its end position. With the help of the position sensor this can be detected.
- a position sensor can be a limit switch, a proximity sensor, e.g. an inductive proximity sensor or the like. Encrusting or other mechanical impairments can result in the valve not being able to be fully opened and / or completely closed and the valve thus not reaching its end position. With the help of the position sensor this can be detected.
- Limit switches can detect the position of the valve.
- a position of a valve can also be determined by means of image evaluation and evaluated accordingly.
- Sensor signals are particularly time-variant.
- the sensor signals can be recorded over a longer period of time.
- a cross correlation for example an SSD correlation, is proposed in particular between the first and second sensor signals. The lower the correlation of the sensor signals to one another, the greater their
- Image signals for example individual images, which have been recorded with an image sensor, for example a CCD sensor, a CMOS sensor or the like, can also be cross-correlated with one another.
- an image sensor for example a CCD sensor, a CMOS sensor or the like
- the acquired first and second image signals can be compared in such a way that pixel values, for example values for chroma and / or luma components of the pixels, are compared with one another and a deviation of these is determined. The amount of all deviations in an image can be recorded. If this is above a limit value, it can be concluded that something has changed in the sensor or its external appearance.
- valves and / or the pressure cylinder are arranged in valve boxes / housings provided for this purpose.
- the valves including servomotors, power supply and, if necessary, connections to a communication bus are combined in these valve boxes / housings.
- the valve box / housing is closed after assembly. In such a valve box / housings, relatively constant environmental conditions prevail, in particular in such a valve box /
- Enclosures are not an external light source, which is the acquisition of image signals
- valve / the pressure cylinder be illuminated by a lamp when the image signal is acquired.
- the illuminant can be provided together with the image sensor in a structural unit and illuminate the valve / pressure cylinder at the moment when the image is captured.
- the illuminant can emit light in the visible range and / or in the infrared range and / or ultraviolet range.
- the valve and / or the pressure cylinder and the sensor be housed in a common housing.
- this housing which is, for example, a valve box, there are sufficiently constant environmental conditions for evaluation.
- the sensor signals are recorded inside the housing.
- the housing ensures that changes to the sensor signals are only due to changes from within the housing Components can be caused. This is in particular the valve and / or the pressure cylinder, which is to be objectively monitored.
- the comparison of the first with the second sensor signals should take place at regular intervals or continuously. It is therefore proposed that the second sensor signals be recorded at intervals, in particular at regular intervals. After the detection, the second sensor signals are compared either directly on site, in a processor arranged in the valve box, for example, with the first sensor signals. It is also possible for the first and second sensor signals to be transmitted from the sensor to a central station via a communication link, wirelessly or by wire, in particular via glass fiber
- Monitoring unit are transmitted.
- the detected sensor signals can be evaluated there, as described.
- the sensor signals from the sensor to a remote one communicating with a plurality of sensors
- Evaluation device wired, in particular by fiber or wireless
- a central evaluation entity can thus carry out an evaluation via a large number, preferably all sensors of a system, in particular a fire-fighting system.
- the first and second sensor signals are compared with one another in a processor which is arranged directly on the valve and / or in the housing and / or the pressure cylinder, and the comparison result is wired to a remote evaluation device, in particular by means of glass fiber or wirelessly, especially via LoRa or WiFi.
- a processor for comparing the sensor signals is inexpensive and can be arranged on any valve / pressure cylinder.
- the valve / pressure cylinder therefore carries out a self-test together with the sensor and delivers the result of the self-test to the evaluation device.
- the valves are, in particular, area valves of a fire-fighting system.
- the valves can also be main valves or shut-off valves, in particular of a fire-fighting system
- Another aspect is a system according to claim 11.
- the valve can be a valve of a fire fighting system. In particular, this can be a range valve or a main valve. Other water powered ones too
- Equipment of a fire fighting system can be objectively monitored.
- a pressure cylinder water cylinder
- a method for monitoring printing cylinders comprising detecting first sensor signals on a printing cylinder in an intact state with a sensor, teaching the monitoring with the first sensor signals recorded on the printing cylinder in an intact state, recording second sensor signals on the printing cylinder in an unknown state with the sensor, comparing the taught-in first sensor signals with the second sensor signals and outputting a signal if the second sensor signals deviate from the first
- the pressure cylinders can be installed stationary in the area of a fire-fighting system and hold extinguishing liquid, in particular water, which is expelled from the pressure cylinder in the event of a fire.
- the pressure cylinders can also be mobile, especially in the area of a rail vehicle, e.g. installed on the roof or in a technical room and are objectively monitored.
- FIG. 1 shows a schematic structure of a fire fighting system
- FIG. 2 shows a schematic structure of a valve box
- 3a shows an arrangement of a sensor in a valve box
- 3b shows an arrangement of a printing cylinder in a housing
- a communication bus can be a CAN bus.
- the control center 14 can control the valves 10 or the valve motors via the communication bus 12 and, if appropriate, receive sensor signals.
- the range valves 10 are in an idle position, which can be either an open position or a closed position.
- the control center 14 controls the motors of the area valves 10 so that they move from the rest position into a maintenance position and / or an active position, which can be an open position or a closed position, in order to check the function of the valves 10 in the event of a wet system, the range valve 10 is closed in the rest position.
- a downstream maintenance valve is closed, the area valve 10 is opened and closed again, and then the maintenance valve is opened again.
- FIG. 2 An area valve 10 in a valve box 16 is shown in FIG. 2.
- the valve box 16 is a lockable housing, into which the pipeline of the main line 4 leads and the pipeline of the area line 6 leads out.
- the valve 10 is arranged in the valve box 16.
- a servomotor 18 is provided on the valve 10, with which the valve 10 can be opened and closed by a motor.
- a magnetic drive can also be provided in a magnetic valve 10.
- the examples presented here also apply to solenoid valves.
- the servomotor 18 is controlled by a processor 20. Over a
- an image sensor 24 for example, can be provided in the valve box 16 in addition to the components mentioned, as shown in FIG. 3a.
- the image sensor 24 can be a CCD sensor or a CMOS sensor, for example.
- the image sensor 24 can be oriented in such a way that its field of vision 24a detects the valve 10 together with the motor 18 and, if appropriate, parts of the pipeline from the main line 4 and the area line 6.
- the sensor 24 is connected to the processor 20.
- a light source can be provided in the valve box 16, which at least partially illuminates the valve box 16 when the image is captured.
- the housing 16a can be used in addition to the aforementioned
- an image sensor 24 may be provided.
- the image sensor 24 can be a CCD sensor or a CMOS sensor, for example.
- the image sensor 24 can be aligned in such a way that its field of vision 24a detects the pressure cylinder 10a together with the valve 10 and, if appropriate, parts of the pipeline from the main line 4 and the area line 6.
- the sensor 24 is connected to the processor 20.
- a light source can be provided in the housing 16, which at least partially illuminates the housing 16 when the image is captured. In particular, a light can be on the bottom of the housing 10a
- Moisture sensor can be arranged with which moisture in the area of the pressure cylinder 10a can be detected.
- a valve 10 in question can be arranged on a pressure cylinder 10a and monitored.
- sensors can be arranged cumulatively or alternatively to one another on the valve 10 and the motor 18 as well as the lines connected to the valve 10 and the pressure cylinder. 4 shows an example of a number of different sensors.
- a structure-borne noise sensor 26 can be arranged on the valve 10.
- a motion sensor 28 can also be arranged on the valve 10.
- a moisture sensor 30 can be provided in the valve box 16.
- a temperature sensor or thermal image sensor 32 can also be arranged in the housing 16.
- Position sensors 34 (or position switches) can be provided on the motor 18, which can detect a position / position of a valve position.
- a current sensor 36 can also be provided on the feed line to the motor 18.
- pressure sensors 38 and / or moisture sensors can be provided in the pipelines 4, 6. The most diverse sensors 24-38 can be used
- FIG. 5a shows, for example, an image of the image sensor 24 from the valve 10. No incrustations or other deposits can be seen on the valve 10. After a certain time, for example after a few years, the image according to FIG. 5b can be recorded, for example, with the same image sensor 24. Deposits can be seen on the underside of the valve, for example by
- a signal can be output.
- the servomotor 18 is driven around the valve 10 to move to a maintenance position, for example. This creates frictional heat which, as can be seen in FIG. 6a, can be seen on the temperature image.
- the image 6b of the temperature sensor 32 shows the valve 10 in an unknown state. This picture is also during a process of
- Actuator 18 has been added to a maintenance position. A changed thermal profile can be seen. A comparison of the thermal images according to FIGS. 6a and b shows that the temperature distribution at the valve 10 is different, which can also indicate a need for maintenance. 7a and b show the course of structure-borne noise on the valve 10, for example, when the motor 18 moves the valve 10 from a closed position into a
- FIG. 7a shows the sound profile in an intact state
- FIG. 7b shows the sound profile on the same valve 10 in an unknown state.
- the sensor signals are detected with the sensors in the valve box 16, as described above.
- the processor 20 can transmit these sensor signals to the control center 14 or evaluate the first and second sensor signals automatically and transmit a signal to the control center 14 only when a need for maintenance is detected , With the aid of the method shown, it is possible in a particularly simple manner
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018119798.5A DE102018119798A1 (en) | 2018-08-15 | 2018-08-15 | Method of monitoring valves |
PCT/EP2019/060104 WO2020035175A1 (en) | 2018-08-15 | 2019-04-18 | Method for monitoring valves |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3837462A1 true EP3837462A1 (en) | 2021-06-23 |
Family
ID=66439999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19722527.9A Pending EP3837462A1 (en) | 2018-08-15 | 2019-04-18 | Method for monitoring valves |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210293354A1 (en) |
EP (1) | EP3837462A1 (en) |
CN (1) | CN112654810A (en) |
DE (1) | DE102018119798A1 (en) |
WO (1) | WO2020035175A1 (en) |
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EP3896249A1 (en) * | 2020-04-16 | 2021-10-20 | E.ON Sverige AB | Automatization of drainage and deaerators |
US11828644B2 (en) * | 2021-01-25 | 2023-11-28 | Saudi Arabian Oil Company | Emergency readiness verification system and method of calibration |
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2018
- 2018-08-15 DE DE102018119798.5A patent/DE102018119798A1/en active Pending
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2019
- 2019-04-18 EP EP19722527.9A patent/EP3837462A1/en active Pending
- 2019-04-18 WO PCT/EP2019/060104 patent/WO2020035175A1/en active Search and Examination
- 2019-04-18 CN CN201980054495.7A patent/CN112654810A/en active Pending
- 2019-04-18 US US17/263,830 patent/US20210293354A1/en active Pending
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CN112654810A (en) | 2021-04-13 |
US20210293354A1 (en) | 2021-09-23 |
DE102018119798A1 (en) | 2020-02-20 |
WO2020035175A1 (en) | 2020-02-20 |
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