CN113834611B - Water leakage alarm device and method for heating - Google Patents
Water leakage alarm device and method for heating Download PDFInfo
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- CN113834611B CN113834611B CN202111111757.4A CN202111111757A CN113834611B CN 113834611 B CN113834611 B CN 113834611B CN 202111111757 A CN202111111757 A CN 202111111757A CN 113834611 B CN113834611 B CN 113834611B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000010438 heat treatment Methods 0.000 title claims description 10
- 230000000007 visual effect Effects 0.000 claims abstract description 29
- 230000006698 induction Effects 0.000 claims abstract description 25
- 230000005236 sound signal Effects 0.000 claims abstract description 21
- 239000008236 heating water Substances 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 44
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- G01M3/04—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
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Alarm Devices (AREA)
- Alarm Systems (AREA)
Abstract
The invention relates to a heating water leakage alarm device and a method, wherein the device comprises an amplifying circuit, a control circuit, a receiving circuit, a driving circuit, an audible and visual alarm, a power supply and a water induction head; the water induction head is arranged at the bottom of the radiator, one end of the water induction head is connected with a power supply, and the other end of the water induction head is connected with the amplifying circuit; the amplifying circuit is used for amplifying the monitoring signal and inputting the monitoring signal into the control circuit; the control circuit comprises a loudspeaker for controlling the loudspeaker to output an audio signal according to the signal input by the amplifying circuit; the receiving circuit comprises an audio receiver for receiving an audio signal, converting the audio signal into an electrical signal and inputting the electrical signal into the driving circuit; the driving circuit comprises a relay, the audible and visual alarm is connected with 220V alternating current through a contact switch in the relay, and the driving circuit is used for driving the contact switch in the relay to change according to an electric signal so as to control the audible and visual alarm to be connected with 220V alternating current; the power supply E is used for supplying power to elements except the audible and visual alarm. The invention has the advantages of high sensitivity and stable and reliable operation.
Description
Technical Field
The invention relates to the technical field of alarm devices, in particular to a heating water leakage alarm device and a heating water leakage alarm method.
Background
The winter time in northeast and inner Mongolia areas is longer, and the heating water leakage phenomenon often occurs in factories, enterprises and institutions and families every winter due to longer heating time, so that great influence is caused to the production and life of people. In order to effectively reduce property loss, an alarm device special for water leakage of heating is needed.
Disclosure of Invention
The invention aims at providing an alarm device and a method special for water leakage of a heating system aiming at least one part of the defects.
In order to achieve the above object, the present invention provides a heating water leakage alarm device, comprising:
the device comprises an amplifying circuit, a control circuit, a receiving circuit, a driving circuit, an audible and visual alarm, a power supply E and at least one water sensing head M;
the water induction head M is arranged at the bottom of the radiator, one end of the water induction head M is connected with the positive electrode of the power supply E, and the other end of the water induction head M is connected with the amplifying circuit;
the amplifying circuit is used for amplifying the monitoring signal input by the water sensing head M and inputting the monitoring signal into the control circuit;
the control circuit comprises a loudspeaker Y, and is used for controlling the loudspeaker Y to output an audio signal according to the signal input by the amplifying circuit;
the receiving circuit comprises an audio receiver S, a driving circuit and a control circuit, wherein the audio receiver S is used for receiving an audio signal output by the loudspeaker Y, converting the audio signal into an electric signal and inputting the electric signal into the driving circuit;
the driving circuit comprises a relay J, the audible and visual alarm is connected with 220V alternating current through a contact switch in the relay J, and the driving circuit is used for driving the contact switch in the relay J to change according to an input electric signal so as to control the audible and visual alarm to be connected with 220V alternating current;
the power supply E is used for supplying power to elements except the audible and visual alarm.
Optionally, the heating water leakage alarm device comprises a plurality of water induction heads M, and each water induction head M is connected in parallel; the distance between two adjacent water induction heads M is 5-10M.
Optionally, the amplifying circuit includes first to sixth resistors R1 to R6, first and second capacitors C1 and C2, a first triode BG1 and a double base diode BG2; the first capacitor C1 is an electrolytic capacitor, and the first triode BG1 is an NPN triode;
one end of the first resistor R1 is connected to the water induction head M, the other end of the first resistor R1 is connected with the grid electrode of the first triode BG1, and the second resistor R2 is connected with the negative electrode of the power supply E; the source electrode of the first triode BG1 is connected with the negative electrode of the power supply E;
the cathode of the first capacitor C1 is connected with the drain electrode of the first triode BG1, the anode of the first capacitor C1 is connected with the emitter electrode of the double-base diode BG2 and is connected with the anode of the power supply E through a third resistor R3, the second base electrode of the double-base diode BG2 is connected with the anode of the power supply E through a fourth resistor R4, and the first base electrode is connected with the cathode of the first capacitor C1 through a fifth resistor R5;
after the second capacitor C2 and the sixth resistor R6 are connected in parallel, one end of the second capacitor C2 is connected with the first base electrode of the double-base diode BG2, and the other end of the second capacitor C is connected with the control circuit;
the negative pole of power E is grounded through switch K.
Optionally, the control circuit further includes a third capacitor C3, a third triode BG3, and a fourth triode BG4; the third capacitor C3 is an electrolytic capacitor, the third triode BG3 is an NPN triode, and the fourth triode BG4 is a PNP triode;
the gates of the third triode BG3 and the fourth triode BG4 are connected with the amplifying circuit; the drain electrode of the third triode BG3 is connected with the positive electrode of the power supply E, the source electrode of the third triode BG4 is connected with the source electrode of the fourth triode BG4, and the drain electrode of the fourth triode BG4 is connected with the negative electrode of the power supply E;
the positive pole of third electric capacity C3 connects the source electrode of third triode BG3, and the negative pole passes through speaker Y and connects power E's negative pole.
Optionally, the receiving circuit further includes a sliding rheostat R7 and an eighth resistor R8, two fixed ends of the sliding rheostat R7 are respectively connected with the positive electrode of the power source E and the ground, one end of the audio receiver S is connected with the positive electrode of the power source E, and the other end is connected with the driving circuit, and is connected with the sliding end of the sliding rheostat R7 through the eighth resistor R8.
Optionally, the driving circuit further includes ninth to twelfth resistors R9 to R12, and fifth and sixth transistors BG5 and BG6; the fifth triode BG5 and the sixth triode BG6 are PNP type low-frequency triodes;
the twelfth resistor R12, the eleventh resistor R11 and the ninth resistor R9 are sequentially connected in series and are connected between the positive electrode of the power supply E and the ground;
the grid electrode of the fifth triode BG5 is connected with the audio receiver S, the source electrode of the fifth triode BG5 is connected with the positive electrode of the power supply E through a tenth resistor R10, and the drain electrode of the fifth triode BG5 is connected between an eleventh resistor R11 and a ninth resistor R9; the gate of the sixth triode BG6 is connected between the twelfth resistor R12 and the eleventh resistor R11, the source is connected to the source of the fifth triode BG5, and the drain is grounded through the coil of the relay J.
Optionally, the heating water running alarm device further comprises an alarm transmitting module, wherein the alarm transmitting module is connected with the audible and visual alarm and is used for transmitting a signal to the appointed terminal equipment when the audible and visual alarm alarms.
Optionally, the power source E is a battery.
The invention also provides a heating water leakage alarm method, which adopts the heating water leakage alarm device described in any one of the above.
The technical scheme of the invention has the following advantages: the invention provides a heating water leakage alarm device and a method, which adopt a water induction head to detect possible water leakage points, convert an electric signal caused by water leakage into a weak sound signal, and receive the weak sound signal to trigger an audible and visual alarm with larger power.
Drawings
Fig. 1 is a schematic circuit diagram of a heating water leakage alarm device in an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a heating water leakage alarm device provided by an embodiment of the present invention includes: the device comprises an amplifying circuit, a control circuit, a receiving circuit, a driving circuit, an audible and visual alarm, a power supply E and at least one water sensing head M. Specifically, wherein:
the water sensing head M is arranged at the bottom of the radiator, one end of the water sensing head M is connected with the positive electrode of the power supply E, and the other end of the water sensing head M is connected with the amplifying circuit; the water sensing head M is used for detecting possible water leakage points, and when water drops on the water sensing head M, the monitoring signals input to the amplifying circuit by the water sensing head M are changed;
the amplifying circuit is used for amplifying the monitoring signal input by the water sensing head M and inputting the monitoring signal into the control circuit;
the control circuit comprises a loudspeaker Y, and is used for controlling the loudspeaker Y to output an audio signal according to the signal input by the amplifying circuit; the audio signal output by the speaker Y is here a weak sound signal, which is insufficient for warning;
the receiving circuit comprises an audio receiver S, a driving circuit and a control circuit, wherein the audio receiver S is used for receiving an audio signal output by the loudspeaker Y, converting the audio signal into an electric signal and inputting the electric signal into the driving circuit; the audio receiver S may employ a microphone or other existing technologies;
the driving circuit comprises a relay J, the audible and visual alarm is connected with 220V alternating current through a contact switch (shown as a J contact switch in fig. 1) in the relay J, and the driving circuit is used for driving the contact switch in the relay J to change according to the electric signal input by the receiving circuit so as to control the audible and visual alarm to be connected with 220V alternating current; the audible and visual alarm can adopt the alarm in the prior art according to the need, and the alarm powered by 220V alternating current can send out a strong enough alarm signal;
the power supply E is used for supplying power to elements except the audible and visual alarm.
The water leakage alarm device for the heating adopts the water induction head M to detect possible water leakage, converts electric signal change caused by water leakage into weak sound signals, outputs the weak sound signals through the loudspeaker Y, and the audio receiver S receives the weak sound signals and converts the weak sound signals into electric signals so as to trigger the audible and visual alarm with larger power; the elements of the heating water leakage alarm device are powered by a power supply E with smaller power (lower voltage) except the audible and visual alarm, so that the heating water leakage alarm device is high in safety and reliability and can be used for standby for a long time.
Preferably, for monitoring, the water leakage alarm device for heating installation comprises a plurality of water induction heads M, wherein each water induction head M is connected in parallel, namely, one end of each water induction head M is connected with the positive electrode of a power supply E, the other end of each water induction head M is connected with an amplifying circuit, and two adjacent water induction heads M are arranged at intervals of 5-10M so as to monitor a heating installation group in a large range.
Preferably, the amplifying circuit includes first to sixth resistors R1 to R6, first and second capacitors C1 and C2, a first triode BG1 and a double base diode BG2; the first capacitor C1 is an electrolytic capacitor, and the first triode BG1 is an NPN triode.
As shown in fig. 1, one end of a first resistor R1 is connected to a water sensing head M, and the other end is connected to the gate of a first triode BG1 and connected to the negative electrode of a power supply E through a second resistor R2; the source electrode of the first triode BG1 is connected with the negative electrode of the power supply E. The negative electrode of the first capacitor C1 is connected with the drain electrode of the first triode BG1, the positive electrode is connected with the emitter electrode of the double-base diode BG2 and is connected with the positive electrode of the power supply E through the third resistor R3, the second base electrode of the double-base diode BG2 is connected with the positive electrode of the power supply E through the fourth resistor R4, and the first base electrode of the double-base diode BG2 is connected with the negative electrode of the first capacitor C1 through the fifth resistor R5. The second capacitor C2 is a nonpolar high-frequency capacitor. After the second capacitor C2 and the sixth resistor R6 are connected in parallel, one end of the second capacitor C2 is connected with the first base electrode of the double-base diode BG2, and the other end of the second capacitor C is connected with the control circuit. The negative pole of the power supply E is grounded through a switch K to control the power supply state of elements of the device except the audible and visual alarm.
In the above embodiment, the first triode BG1 and the double base diode BG2 together realize a small signal amplifying function, and amplify the monitoring signal input by the water sensing head M to input the next stage.
Further, the control circuit comprises a loudspeaker Y, a third capacitor C3, a third triode BG3 and a fourth triode BG4; the third capacitor C3 is an electrolytic capacitor, the third triode BG3 is an NPN triode, and the fourth triode BG4 is a PNP triode.
As shown in fig. 1, the gates of the third transistor BG3 and the fourth transistor BG4 are connected to an amplifying circuit, that is, one end of a second capacitor C2 and a sixth resistor R6 connected in parallel. The drain electrode of the third triode BG3 is connected with the positive electrode of the power supply E, the source electrode of the third triode BG3 is connected with the source electrode of the fourth triode BG4, and the drain electrode of the fourth triode BG4 is connected with the negative electrode of the power supply E. The positive pole of the third capacitor C3 is connected with the sources of the third triode BG3 and the fourth triode BG4, and the negative pole is connected with the negative pole of the power supply E through the loudspeaker Y. In the above embodiment, the control circuit may control the audio signal output.
Preferably, the receiving circuit comprises an audio receiver S, a slide rheostat R7 and an eighth resistor R8, wherein two fixed ends of the slide rheostat R7 are respectively connected with the positive electrode of the power supply E and the ground, one end of the audio receiver S is connected with the positive electrode of the power supply E, the other end is connected with the driving circuit, and the slide ends of the slide rheostat R7 are connected through the eighth resistor R8. In the above embodiment, the slide rheostat R7 can be used to regulate the contact switch variation sensitivity in the drive circuit relay J.
Further, the driving circuit includes, in addition to the relay J, a ninth resistor R9 to a twelfth resistor R12, and a fifth transistor BG5 and a sixth transistor BG6; the fifth triode BG5 and the sixth triode BG6 are PNP low-frequency triodes.
As shown in fig. 1, a twelfth resistor R12, an eleventh resistor R11, and a ninth resistor R9 are sequentially connected in series between the positive electrode of the power source E and ground. The grid electrode of the fifth triode BG5 is connected with one end of the audio receiver S, namely, the grid electrode of the fifth triode BG5 is connected with the sliding end of the sliding rheostat R7 through an eighth resistor R8, the source electrode of the fifth triode BG5 is connected with the positive electrode of the power supply E through a tenth resistor R10, and the drain electrode of the fifth triode BG5 is connected between an eleventh resistor R11 and a ninth resistor R9; the grid electrode of the sixth triode BG6 is connected between the twelfth resistor R12 and the eleventh resistor R11, the source electrode of the sixth triode BG6 is connected with the source electrode of the fifth triode BG5, and the drain electrode of the sixth triode BG6 is grounded through a coil of the relay J. Through the change of the electric signal in the coil of the relay J, the contact switch in the relay J changes, and when water leakage occurs, the audible and visual alarm is connected with 220V alternating current.
Preferably, the heating water running alarm device further comprises an alarm transmitting module, wherein the alarm transmitting module is connected with the audible and visual alarm and is used for transmitting signals to appointed terminal equipment, such as a mobile phone or a PC (personal computer) and the like, when the audible and visual alarm alarms, so that an on-duty person or other users can receive the water running alarm message in time.
Preferably, in the warm air water leakage alarm device, the power source E is a battery (or a battery pack). The battery is used as the power supply E to supply power to elements except the audible and visual alarm, so that the device is convenient to arrange, easy to move and more flexible to use.
In a preferred embodiment, as shown in fig. 1, the resistances of the first resistor R1 to the sixth resistor R6 are respectively 10kΩ, 3.3kΩ, 15kΩ, 150 Ω, 51 Ω, and 5kΩ, the capacitances of the first capacitor C1 to the third capacitor C3 are respectively 30 μf, 2200pF, and 10 μf, the first transistor BG1 is 3DG12, the double base diode BG2 is BT33, the third transistor BG3 is 3DG6, and the fourth transistor BG4 is 3CG3. The resistance between the fixed ends of the sliding rheostat R7 is 4.7kΩ, the resistance of the eighth resistor R8 to the twelfth resistor R12 is 3.3kΩ, 2.2kΩ, 10Ω, 1kΩ, 3.3kΩ, and the model numbers of the fifth triode BG5 and the sixth triode BG6 are 3AX31 respectively.
The invention also provides a heating water leakage alarm method, which adopts the heating water leakage alarm device according to any one of the embodiments to alarm.
Preferably, the method further comprises: after the alarm, the corresponding heating valve is turned off, so that the flooding phenomenon is avoided, and the property loss is reduced to the maximum extent.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A heating water leakage alarm device, which is characterized by comprising:
the device comprises an amplifying circuit, a control circuit, a receiving circuit, a driving circuit, an audible and visual alarm, a power supply E and a plurality of water induction heads M;
the water induction head M is arranged at the bottom of the radiator, one end of the water induction head M is connected with the positive electrode of the power supply E, and the other end of the water induction head M is connected with the amplifying circuit; each water induction head M is connected in parallel; the interval between two adjacent water induction heads M is 5-10M;
the amplifying circuit is used for amplifying the monitoring signal input by the water sensing head M and inputting the monitoring signal into the control circuit;
the control circuit comprises a loudspeaker Y, and is used for controlling the loudspeaker Y to output an audio signal according to the signal input by the amplifying circuit;
the receiving circuit comprises an audio receiver S, a driving circuit and a control circuit, wherein the audio receiver S is used for receiving an audio signal output by the loudspeaker Y, converting the audio signal into an electric signal and inputting the electric signal into the driving circuit;
the driving circuit comprises a relay J, the audible and visual alarm is connected with 220V alternating current through a contact switch in the relay J, and the driving circuit is used for driving the contact switch in the relay J to change according to an input electric signal so as to control the audible and visual alarm to be connected with 220V alternating current;
the power supply E is used for supplying power to elements except the audible and visual alarm;
the amplifying circuit comprises a first resistor R1 to a sixth resistor R6, a first capacitor C1, a second capacitor C2, a first triode BG1 and a double-base diode BG2; the first capacitor C1 is an electrolytic capacitor, and the first triode BG1 is an NPN triode;
one end of the first resistor R1 is connected to the water induction head M, the other end of the first resistor R1 is connected with the grid electrode of the first triode BG1, and the second resistor R2 is connected with the negative electrode of the power supply E; the source electrode of the first triode BG1 is connected with the negative electrode of the power supply E;
the cathode of the first capacitor C1 is connected with the drain electrode of the first triode BG1, the anode of the first capacitor C1 is connected with the emitter electrode of the double-base diode BG2 and is connected with the anode of the power supply E through a third resistor R3, the second base electrode of the double-base diode BG2 is connected with the anode of the power supply E through a fourth resistor R4, and the first base electrode is connected with the cathode of the first capacitor C1 through a fifth resistor R5;
after the second capacitor C2 and the sixth resistor R6 are connected in parallel, one end of the second capacitor C2 is connected with the first base electrode of the double-base diode BG2, and the other end of the second capacitor C is connected with the control circuit;
the negative electrode of the power supply E is grounded through a switch K;
the control circuit further comprises a third capacitor C3, a third triode BG3 and a fourth triode BG4; the third capacitor C3 is an electrolytic capacitor, the third triode BG3 is an NPN triode, and the fourth triode BG4 is a PNP triode;
the gates of the third triode BG3 and the fourth triode BG4 are connected with the amplifying circuit; the drain electrode of the third triode BG3 is connected with the positive electrode of the power supply E, the source electrode of the third triode BG4 is connected with the source electrode of the fourth triode BG4, and the drain electrode of the fourth triode BG4 is connected with the negative electrode of the power supply E;
the positive electrode of the third capacitor C3 is connected with the source electrode of the third triode BG3, and the negative electrode of the third capacitor C is connected with the negative electrode of the power supply E through the loudspeaker Y;
the receiving circuit further comprises a slide rheostat R7 and an eighth resistor R8, wherein two fixed ends of the slide rheostat R7 are respectively connected with the positive electrode of the power supply E and the ground, one end of the audio receiver S is connected with the positive electrode of the power supply E, and the other end of the audio receiver S is connected with the driving circuit and is connected with the sliding end of the slide rheostat R7 through the eighth resistor R8;
the driving circuit further comprises a ninth resistor R9 to a twelfth resistor R12, a fifth triode BG5 and a sixth triode BG6; the fifth triode BG5 and the sixth triode BG6 are PNP type low-frequency triodes;
the twelfth resistor R12, the eleventh resistor R11 and the ninth resistor R9 are sequentially connected in series and are connected between the positive electrode of the power supply E and the ground;
the grid electrode of the fifth triode BG5 is connected with the audio receiver S, the source electrode of the fifth triode BG5 is connected with the positive electrode of the power supply E through a tenth resistor R10, and the drain electrode of the fifth triode BG5 is connected between an eleventh resistor R11 and a ninth resistor R9; the gate of the sixth triode BG6 is connected between the twelfth resistor R12 and the eleventh resistor R11, the source is connected to the source of the fifth triode BG5, and the drain is grounded through the coil of the relay J.
2. The warm air water run-out alarm device according to claim 1, wherein:
the alarm system also comprises an alarm transmitting module, wherein the alarm transmitting module is connected with the audible and visual alarm and is used for transmitting signals to appointed terminal equipment when the audible and visual alarm alarms.
3. The warm air water run-out alarm device according to any one of claims 1 or 2, wherein:
the power supply E is a battery.
4. A water leakage alarm method for a heating system is characterized in that: a heating water leakage alarm device according to any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111757.4A CN113834611B (en) | 2021-09-23 | 2021-09-23 | Water leakage alarm device and method for heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111111757.4A CN113834611B (en) | 2021-09-23 | 2021-09-23 | Water leakage alarm device and method for heating |
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| CN113834611A CN113834611A (en) | 2021-12-24 |
| CN113834611B true CN113834611B (en) | 2024-01-26 |
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| CN2711485Y (en) * | 2004-07-26 | 2005-07-20 | 王青远 | Leakage proof self-control water valve |
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| CN202887349U (en) * | 2012-09-18 | 2013-04-17 | 浙江运达风电股份有限公司 | Wind power plant audio frequency identification acousto-optic alarming device based on SCADA system |
| CN205073120U (en) * | 2015-10-19 | 2016-03-09 | 国家电网公司 | Multi -functional live working goggles |
| CN205244847U (en) * | 2015-11-27 | 2016-05-18 | 张瀚方 | Heating installation detection alarm device that leaks |
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2021
- 2021-09-23 CN CN202111111757.4A patent/CN113834611B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2711485Y (en) * | 2004-07-26 | 2005-07-20 | 王青远 | Leakage proof self-control water valve |
| CN2872356Y (en) * | 2006-02-14 | 2007-02-21 | 张洪平 | Indoor water leakage alarming device |
| CN202443561U (en) * | 2011-12-02 | 2012-09-19 | 中国科学院近代物理研究所 | Water leakage alarm system |
| CN202841312U (en) * | 2012-09-08 | 2013-03-27 | 白银有色集团股份有限公司 | Telephone call acousto-optic enlargement prompt device |
| CN202887349U (en) * | 2012-09-18 | 2013-04-17 | 浙江运达风电股份有限公司 | Wind power plant audio frequency identification acousto-optic alarming device based on SCADA system |
| CN205073120U (en) * | 2015-10-19 | 2016-03-09 | 国家电网公司 | Multi -functional live working goggles |
| CN205244847U (en) * | 2015-11-27 | 2016-05-18 | 张瀚方 | Heating installation detection alarm device that leaks |
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| CN113834611A (en) | 2021-12-24 |
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