WO1994029822A1 - Device and installation for warning of clogging of roof rainwater outlets or the like - Google Patents

Device and installation for warning of clogging of roof rainwater outlets or the like Download PDF

Info

Publication number
WO1994029822A1
WO1994029822A1 PCT/NO1994/000104 NO9400104W WO9429822A1 WO 1994029822 A1 WO1994029822 A1 WO 1994029822A1 NO 9400104 W NO9400104 W NO 9400104W WO 9429822 A1 WO9429822 A1 WO 9429822A1
Authority
WO
WIPO (PCT)
Prior art keywords
detector
installation
water
outlets
electronics unit
Prior art date
Application number
PCT/NO1994/000104
Other languages
French (fr)
Inventor
Johnsen Asle
Original Assignee
Aiwell
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aiwell filed Critical Aiwell
Priority to AU69858/94A priority Critical patent/AU6985894A/en
Publication of WO1994029822A1 publication Critical patent/WO1994029822A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
    • E04D13/0404—Drainage on the roof surface
    • E04D13/0409—Drainage outlets, e.g. gullies
    • E04D2013/0413—Strainers for drainage outlets

Definitions

  • the present invention relates to a device for warning of clogging of roof rainwater outlets or the like, especially outlets on flat roofs. Further, the invention relates to an installation comprising a number of such warning devices for mounting on respective roof rainwater outlets or the like.
  • Outlet or drainage openings on flat roofs or gutter systems often are clogged because of leaves, bird feathers, dirt and the like. This may result in that the water rises and the roof surface is placed under water pressure. Because of the large weight of the water this often results in leakages, and in some s cases the result is that the roof structure is overloaded and collapses. This may result in large internal damage to the buildings.
  • Another object of the invention is to provide an installation comprising a number of such warning devices, and which may be arranged in such a manner that the person which is responsible for cleaning of the roof outlets, can not disconnect an alarm means belonging to the warning device in question before 5 the water level at the topical roof has sunk to below a certain level.
  • a device of the introductorily stated type which, according to the invention, is characterized in that it comprises a fastening means arranged to be fastened to the outlet at a desired height thereon, and in which there is mounted at least one water detector, the fastening means comprising a protective body protecting the detector from rainwater from above and from the sides.
  • an installation of the introductorily stated type which, according to the invention, is characterized in that it comprises a central electronics unit connected to a number of detecting loops of which each has at least one associated warning device, the electronics unit comprising indicators for indicating respective loops having detectors detecting water.
  • the indicators in the installation according to the invention may, for example, consist of light emitting diodes (LEDs).
  • the electronics unit comprises an alarm means in the form of a sound transmitter which is activated when a detector detects water.
  • the electronics unit suitably comprises reset switches for resetting respective indicators and the sound transmitter, and preferably are arranged in such a manner that the installation cannot be reset before the outlet in question has been cleaned and the water level has sunk to below the topical detector level.
  • Fig. 1 shows a side view of a roof rainwater outlet having a gully grating or hood which is provided with a warning device according to the invention
  • Fig. 2 shows a sectional view along the line II-II in Fig. 1;
  • Fig. 3 shows a view of the front side of the electro ⁇ nics unit in an installation according to the invention.
  • a gully grating or hood 1 which is mounted over a roof rainwater outlet 2 (suggested with dashed lines) on a flat roof, and which is provided with a warning device 3 according to the invention.
  • the warning device comprises a fastening means 4 which is fastened, e.g. with a fastening screw 5, to the gully hood 1 ' at a suitably chosen height above the roof surface 6.
  • a pair of detectors 7 in the form of water sensors which, through associated lines 8, are connected to the electronics unit of the installation (Fig. 3), possibly by way of a junction box (not shown).
  • the fastening means 4 comprises a protective body s protecting the detectors from rainwater from above and from the sides.
  • the fastening means proper is shaped as a bracket or cover 9 wherein the detectors 7 are fastened by screws or the like under a cover top surface, and wherein the cover is provided with a downwards depending side o flange 10 for protection against rainwater.
  • the detector or detectors
  • the detector may be embedded in a suitable protective body, so that only the sensor element thereof is exposed towards the underside of the body.
  • Fig. 3 shows a view of the front side of an embodiment s of the electronics unit 15 forming part of the installation according to the invention, and which constitutes an alarm central.
  • the unit is connected to the AC mains through a supply cable 16.
  • a battery-driven power supply (not shown) seeing to it that the installation is o intact even if the mains falls out.
  • the electronics unit 15 comprises a number of loop inputs 17 for connection of respective detecting loops L1-L6.
  • the illustrated embodiment there are provided six loop inputs wherein up to twelve detectors per loop L1-L6 may be connected. 5
  • the alarm central then may cover up to 72 roof outlets. This will be a normal number for a building having a roof surface of ca. 18 000 m 2 .
  • each detecting loop will be connected to a junction box (not shown) of commercially available type, to which the detectors in the loop in question are connected.
  • an indicator 18 e.g.
  • a light emitting diode which is lighted when a detector 7 in the loop or "leg" in question detects water at a certain height above the roof surface, for example 3-4 cm over the roof covering.
  • a sound transmitter 19 e.g. a summer or loud- 5 speaker, which is activated when a detector 7 detects water, so that the alarm central delivers an audible alarm in addition to the fact that the topical light emitting diode 18 lits and indicates that an outlet in the loop in question is in the process of being clogged.
  • a reset switch or reset button 20 which is used to reset the installation, switch off the alarm signal and extinguish the associated light emitting diode 18 when the outlet in question is cleaned and the water level has sunk below the topical detector level.
  • the installation may be arranged in such a manner that, when the alarm is switched off, only the sound transmitter 19 will be disconnected, whereas the topical light emitting diode 18 will still light until the outlet has been cleaned and the water level has sunk below the detector level.
  • the installation may be arranged in such a manner that it cannot be reset and the sound transmitter disconnected before the topical outlet has been cleaned and the water level has sunk, and so that the installation will continue to deliver an alarm even if the detector no longer senses water. This is achieved by providing a making contact (not shown) which, when the topical detector detects water, lights the light emitting diode 18 in question and connects the sound transmitter 19.
  • the only way of disconnecting the alarm is to open the making contact by means of the associated reset button 20.
  • the reset button is spring- loaded, so that it automatically returns to its initial position after use. If the water detector still senses water, it will again immediately connect the alarm. The water level therefore has to sink to below the detector before the alarm can be switched off.
  • an external siren or the like may be connected to an output 21.
  • the unit 15 is also provided with an additional loop input 22 for connection of an additional detector loop S containing a number of water detectors which is mounted at a somewhat higher level than the other detectors, and with an associated light emitting diode 23 and a reset button 24.
  • the detectors of the loop indicate the highest water level which is allowed, and when one of the detectors detects water, a signal is delivered to an external siren (not shown) which may be connected to an output 25.
  • the signal may be connected further to a telephone message device (not shown) which may be connected through an output 26 and which gives a warning over the telephone network. This provides an extra security, and is especially intended to take care of inspection on holidays and vacations.
  • the light emitting diodes 18 and the sound transmitter 19 give a warning internally in the building in question before the detectors in the additional security loop operate and provide for dialling and message delivery via the telephone network.
  • the internal electronic circuits within the electronics unit 15 are not further shown, these being of professional kind and will be able to be readily constructed by a person skilled in the art.
  • the water detectors in the installation according to the invention utilize the water as a conductor, so that the installation does not contain movable parts, such as floats or the like, something which contributes to increasing the safety of the installation.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Hydroponics (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

A device and an installation for warning of clogging of roof rainwater outlets or the like, especially outlets on flat roofs. The device comprises a fastening means (4) arranged to be fastened to the outlet (2) at a desired height thereon, and in which there is mounted at least one water detector (7), the fastening means (4) comprising a protective body (9) protecting the detector (7) from rainwater from above and from the sides. The installation comprises a number of warning devices (3) for mounting on respective roof rainwater outlets (2), and a central electronics unit (15) connected to a number of detecting loops (L1-L6) having at least one associated warning device (3), the electronics unit (15) comprising indicators (18) for indicating respective loops (L1-L6) having detectors (7) detecting water.

Description

Device and installation for warning of clogging of roof rainwater outlets or the like
5 The present invention relates to a device for warning of clogging of roof rainwater outlets or the like, especially outlets on flat roofs. Further, the invention relates to an installation comprising a number of such warning devices for mounting on respective roof rainwater outlets or the like. 0 Outlet or drainage openings on flat roofs or gutter systems often are clogged because of leaves, bird feathers, dirt and the like. This may result in that the water rises and the roof surface is placed under water pressure. Because of the large weight of the water this often results in leakages, and in some s cases the result is that the roof structure is overloaded and collapses. This may result in large internal damage to the buildings.
There are previously known different devices for detection and measuring of water levels. Such devices are used, o for example, on board ships, in cellars, transformer stations, water reservoirs, etc. Detection may take place by means of float systems or detectors utilizing the water as an electric conduc¬ tor. However, the known devices are not constructed or suitable for warning of clogging of roof rainwater outlets or the like. 5 it is thus an object of the invention to provide a device which, in an efficient and safe manner, gives a warning when a roof outlet is in the process of being clogged, for preventing in this manner that large roof surfaces are placed under water pressure. o Another object of the invention is to provide an installation comprising a number of such warning devices, and which may be arranged in such a manner that the person which is responsible for cleaning of the roof outlets, can not disconnect an alarm means belonging to the warning device in question before 5 the water level at the topical roof has sunk to below a certain level.
For achievement of the above-mentioned objects there is provided a device of the introductorily stated type which, according to the invention, is characterized in that it comprises a fastening means arranged to be fastened to the outlet at a desired height thereon, and in which there is mounted at least one water detector, the fastening means comprising a protective body protecting the detector from rainwater from above and from the sides.
Further, there is provided an installation of the introductorily stated type which, according to the invention, is characterized in that it comprises a central electronics unit connected to a number of detecting loops of which each has at least one associated warning device, the electronics unit comprising indicators for indicating respective loops having detectors detecting water.
The indicators in the installation according to the invention may, for example, consist of light emitting diodes (LEDs). Preferably, the electronics unit comprises an alarm means in the form of a sound transmitter which is activated when a detector detects water. Further, the electronics unit suitably comprises reset switches for resetting respective indicators and the sound transmitter, and preferably are arranged in such a manner that the installation cannot be reset before the outlet in question has been cleaned and the water level has sunk to below the topical detector level.
The invention will be further described below in connection with exemplary embodiments with reference to the drawings, wherein
Fig. 1 shows a side view of a roof rainwater outlet having a gully grating or hood which is provided with a warning device according to the invention;
Fig. 2 shows a sectional view along the line II-II in Fig. 1; and
Fig. 3 shows a view of the front side of the electro¬ nics unit in an installation according to the invention.
In Figs. 1 and 2 there is shown a gully grating or hood 1 which is mounted over a roof rainwater outlet 2 (suggested with dashed lines) on a flat roof, and which is provided with a warning device 3 according to the invention. The warning device comprises a fastening means 4 which is fastened, e.g. with a fastening screw 5, to the gully hood 1 ' at a suitably chosen height above the roof surface 6. In the fastening means there are mounted a pair of detectors 7 in the form of water sensors which, through associated lines 8, are connected to the electronics unit of the installation (Fig. 3), possibly by way of a junction box (not shown). The fastening means 4 comprises a protective body s protecting the detectors from rainwater from above and from the sides. In the illustrated embodiment, the fastening means proper is shaped as a bracket or cover 9 wherein the detectors 7 are fastened by screws or the like under a cover top surface, and wherein the cover is provided with a downwards depending side o flange 10 for protection against rainwater. As an alternative, the detector (or detectors) may be embedded in a suitable protective body, so that only the sensor element thereof is exposed towards the underside of the body.
Fig. 3 shows a view of the front side of an embodiment s of the electronics unit 15 forming part of the installation according to the invention, and which constitutes an alarm central. The unit is connected to the AC mains through a supply cable 16. In addition there may be arranged a battery-driven power supply (not shown) seeing to it that the installation is o intact even if the mains falls out.
The electronics unit 15 comprises a number of loop inputs 17 for connection of respective detecting loops L1-L6. In the illustrated embodiment there are provided six loop inputs wherein up to twelve detectors per loop L1-L6 may be connected. 5 The alarm central then may cover up to 72 roof outlets. This will be a normal number for a building having a roof surface of ca. 18 000 m2. Normally, each detecting loop will be connected to a junction box (not shown) of commercially available type, to which the detectors in the loop in question are connected. For each o loop L1-L6 there is provided an indicator 18, e.g. a light emitting diode, which is lighted when a detector 7 in the loop or "leg" in question detects water at a certain height above the roof surface, for example 3-4 cm over the roof covering. Further, there is provided a sound transmitter 19, e.g. a summer or loud- 5 speaker, which is activated when a detector 7 detects water, so that the alarm central delivers an audible alarm in addition to the fact that the topical light emitting diode 18 lits and indicates that an outlet in the loop in question is in the process of being clogged. For each indicator (light emitting diode) 18 there is provided a reset switch or reset button 20 which is used to reset the installation, switch off the alarm signal and extinguish the associated light emitting diode 18 when the outlet in question is cleaned and the water level has sunk below the topical detector level.
The installation may be arranged in such a manner that, when the alarm is switched off, only the sound transmitter 19 will be disconnected, whereas the topical light emitting diode 18 will still light until the outlet has been cleaned and the water level has sunk below the detector level. As an alternative, the installation may be arranged in such a manner that it cannot be reset and the sound transmitter disconnected before the topical outlet has been cleaned and the water level has sunk, and so that the installation will continue to deliver an alarm even if the detector no longer senses water. This is achieved by providing a making contact (not shown) which, when the topical detector detects water, lights the light emitting diode 18 in question and connects the sound transmitter 19. The only way of disconnecting the alarm is to open the making contact by means of the associated reset button 20. The reset button is spring- loaded, so that it automatically returns to its initial position after use. If the water detector still senses water, it will again immediately connect the alarm. The water level therefore has to sink to below the detector before the alarm can be switched off.
If a stronger sound signal is desired, an external siren or the like may be connected to an output 21.
As shown in Fig. 3, the unit 15 is also provided with an additional loop input 22 for connection of an additional detector loop S containing a number of water detectors which is mounted at a somewhat higher level than the other detectors, and with an associated light emitting diode 23 and a reset button 24. The detectors of the loop indicate the highest water level which is allowed, and when one of the detectors detects water, a signal is delivered to an external siren (not shown) which may be connected to an output 25. In addition the signal may be connected further to a telephone message device (not shown) which may be connected through an output 26 and which gives a warning over the telephone network. This provides an extra security, and is especially intended to take care of inspection on holidays and vacations. As one will understand, the light emitting diodes 18 and the sound transmitter 19 give a warning internally in the building in question before the detectors in the additional security loop operate and provide for dialling and message delivery via the telephone network.
The internal electronic circuits within the electronics unit 15 are not further shown, these being of professional kind and will be able to be readily constructed by a person skilled in the art.
The water detectors in the installation according to the invention utilize the water as a conductor, so that the installation does not contain movable parts, such as floats or the like, something which contributes to increasing the safety of the installation.

Claims

P a t e n t C l a i m s
1. A device for warning of clogging of roof rainwater outlets or the like, especially outlets on flat roofs, charac¬ terized in that it comprises a fastening means (4) arranged to be fastened to the outlet (2) at a desired height thereon, and in which there is mounted at least one water detector (7), the fastening means (4) comprising a protective body (9) protecting the detector (7) from rainwater from above and from the sides.
2. A device according to claim 1, characterized in that the protective body is a bracket or a cover (9) which closed at the top and has side walls (10) projecting further downwards than the detector or detectors (7) .
3. An installation comprising a number of warning devices (3) according to claim 1 for mounting on respective roof rainwater outlets (2) or the like, characterized in that it comprises a central electronics unit (15) connected to a number of detecting loops (L1-L6) of which each has at least one associated warning device (3), the electronics unit (15) comprising indicators (18) for indicating respective loops (Ll- L6) having detectors (7) detecting water.
4. An installation according to claim 3, characterized in that the indicators (18) consist of light emitting diodes.
5. An installation according to claim 3 or 4, charac¬ terized in that the electronics unit (15) comprises a sound transmitter (19) which is activated when a detector (7) detects water.
6. An installation according to claim 5, characterized in that the electronics unit (15) comprises reset switches (20) for resetting of respective indicators (18) and a sound transmit¬ ter (19).
7. An installation according to claim 6, characterized in that the electronics unit (15) is so arranged that the installation cannot be reset before the outlet (2) in question is cleaned and the water level has sunk to below the detector level.
8. An installation according to any of the claims 3-7, characterized in that it comprises at least one additional water detector which is mounted at a somewhat larger height than the detectors (7 ) on the outlets (2) .
9. An installation according to claim 8, characterized in that it comprises an extra indicator (23) which is associated with the additional detector and is connected to a separate sound transmitter or to a message device for further connection to the telephone network.
PCT/NO1994/000104 1993-06-04 1994-06-06 Device and installation for warning of clogging of roof rainwater outlets or the like WO1994029822A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69858/94A AU6985894A (en) 1993-06-04 1994-06-06 Device and installation for warning of clogging of roof rainwater outlets or the like

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO932040 1993-06-04
NO932040A NO300938B1 (en) 1993-06-04 1993-06-04 Device and plant for warning of clogging of roof hatches or the like

Publications (1)

Publication Number Publication Date
WO1994029822A1 true WO1994029822A1 (en) 1994-12-22

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ID=19896149

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO1994/000104 WO1994029822A1 (en) 1993-06-04 1994-06-06 Device and installation for warning of clogging of roof rainwater outlets or the like

Country Status (3)

Country Link
AU (1) AU6985894A (en)
NO (1) NO300938B1 (en)
WO (1) WO1994029822A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022465C2 (en) * 2003-01-22 2004-07-26 Jean-Yves Jozef Den Doelder Safety device for warning of excessive amount of water collected on flat roofs, comprises casing and float with cooperating contacts
GB2461607A (en) * 2009-05-05 2010-01-13 Hutton & Rostron Environmental Sensing water level in gutters based on measured variation in resistance between two electrodes
JP2021092094A (en) * 2019-12-11 2021-06-17 田島ルーフィング株式会社 Drain clogging notification device
FR3121695A1 (en) * 2021-04-12 2022-10-14 Saint Gobain Pam Liquid evacuation assembly and corresponding installation
JP7484458B2 (en) 2020-06-10 2024-05-16 三菱電機ビルソリューションズ株式会社 Water tank drainage monitoring system
US12012759B2 (en) 2020-11-06 2024-06-18 Watts Regulator Co. Intelligent roof drain systems and methods
US12012760B2 (en) 2020-11-06 2024-06-18 Watts Regulator Co. Intelligent roof drain systems and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137527A (en) * 1977-07-18 1979-01-30 Tennenhouse Clifford C Liquid level sensing device
US4216468A (en) * 1978-09-11 1980-08-05 Harold Kaufmann Flood warning device
US4761638A (en) * 1986-09-15 1988-08-02 Lozano Jr Miguel A Means and method for detecting presence of electrically conductive fluid
US5283569A (en) * 1989-12-15 1994-02-01 U.S. Army Corps Of Engineers Float actuated flood warning system with remote telephone reporting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137527A (en) * 1977-07-18 1979-01-30 Tennenhouse Clifford C Liquid level sensing device
US4216468A (en) * 1978-09-11 1980-08-05 Harold Kaufmann Flood warning device
US4761638A (en) * 1986-09-15 1988-08-02 Lozano Jr Miguel A Means and method for detecting presence of electrically conductive fluid
US5283569A (en) * 1989-12-15 1994-02-01 U.S. Army Corps Of Engineers Float actuated flood warning system with remote telephone reporting

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022465C2 (en) * 2003-01-22 2004-07-26 Jean-Yves Jozef Den Doelder Safety device for warning of excessive amount of water collected on flat roofs, comprises casing and float with cooperating contacts
GB2461607A (en) * 2009-05-05 2010-01-13 Hutton & Rostron Environmental Sensing water level in gutters based on measured variation in resistance between two electrodes
GB2461607B (en) * 2009-05-05 2010-05-19 Hutton & Rostron Environmental A gutter or drain water level sensor arrangement
JP2021092094A (en) * 2019-12-11 2021-06-17 田島ルーフィング株式会社 Drain clogging notification device
JP7484458B2 (en) 2020-06-10 2024-05-16 三菱電機ビルソリューションズ株式会社 Water tank drainage monitoring system
US12012759B2 (en) 2020-11-06 2024-06-18 Watts Regulator Co. Intelligent roof drain systems and methods
US12012760B2 (en) 2020-11-06 2024-06-18 Watts Regulator Co. Intelligent roof drain systems and methods
FR3121695A1 (en) * 2021-04-12 2022-10-14 Saint Gobain Pam Liquid evacuation assembly and corresponding installation

Also Published As

Publication number Publication date
NO932040D0 (en) 1993-06-04
NO932040L (en) 1994-12-05
AU6985894A (en) 1995-01-03
NO300938B1 (en) 1997-08-18

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