A circuit for realizing water meter disconnection and valve closing
A water meter and disconnection technology, which is applied in the field of smart card water meters, can solve the problems of water supply unit loss and waste water, and achieve the effects of limited cost, simple circuit design, and easy market promotion
Active Publication Date: 2018-09-11
TIANJIN BINGHUA ENERGY TECH
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Problems solved by technology
Although this method is convenient to use, it has a protection problem. If the multi-core cable is damaged, if it is not dealt with, it will cause the problem of waste water, which will cause unpredictable losses to the water supply unit, especially for large-diameter water meters. Tens of thousands of water bills may be generated in a few days, so this problem must be solved
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[0011] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings: It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive, so the present invention is not limited to the implementation described in the specific embodiments. For example, all other implementations obtained by those skilled in the art according to the technical solution of the present invention also belong to the protection scope of the present invention.
[0012] A circuit that realizes water meter disconnection and valve closing, such as figure 1 As shown, including the valve-closing power supply BT1, triode Q1, triode Q2 and triode Q3 after disconnection, the valve-closing limit switch S1 of the electric valve M1 is connected in series at the negative end of the valve-closing power supply BT1. The valve-closing limit switch S1 is normally Closed type, disconnected in place, the negative end...
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The invention relates to a circuit capable of achieving the effect of closing a valve in case of case of cable breakage of a water meter. The circuit is characterized in that a negative terminal of a valve closing power supply BT1 is connected with a collector electrode of a triode Q1 and a collector electrode of a triode Q3 through a valve closing in-place switch S1 respectively; a positive terminal of the valve closing power supply BT1 is connected with a resistor R1 and a resistor R5 in series, then is connected with a base electrode of the triode Q1 and a collector electrode of a triode Q2, is connected with a base electrode of the triode Q2 through a resistor R4, and is connected with an emitting electrode of the triode Q3 through an electric valve M1; an emitting electrode of the triode Q2 is connected with a base electrode of the triode Q3 through a resistor R2; a resistor R3 is connected between the base electrode of the triode Q3 and the valve closing in-place switch S1; and a cable breakage prevention switch S2 is connected between the collector electrode of the triode Q1 and a node between the resistor R1 and the resistor R5. With the adoption of the circuit, the problem that water is wasted after a multi-core cable between a control box and a mechanical water meter is damaged is solved.
Description
technical field [0001] The invention belongs to the technical field of smart card water meters, in particular to a circuit for realizing water meter disconnection and valve closing. Background technique [0002] At present, with the development of electronic technology and network technology, the smart meter industry has achieved great development. The application of smart card water meters has begun to gradually replace the old-fashioned water meters with manual reading and billing. Inquiry, unlike the indoor integrated smart card water meter, this type of water meter usually puts the electronic controller in a sealed box, and the control box is connected to the mechanical water meter with a multi-core cable several meters long. The cable contains The water meter counting signal line, the electric valve control line, and the control box are hung at the mouth of the ground well. Although this method is convenient to use, it has a protection problem. If the multi-core cable ...
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IPC IPC(8): F16K31/02
CPCF16K31/02
Inventor 张炳华
Owner TIANJIN BINGHUA ENERGY TECH