CN2227361Y

CN2227361Y - Anti-theft siren for power line and transformer

Info

Publication number: CN2227361Y
Application number: CN 94222128
Authority: CN
Inventors: 李永金; 熊泽龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-14
Filing date: 1994-09-14
Publication date: 1996-05-15
Anticipated expiration: 2004-09-14

Abstract

The utility model relates to an anti-theft alarm for power lines and transformers, composed of a control return circuit, an error resistant circuit, an alarm circuit and a packaging outer shell. The utility model has the advantages of simple structure, complete function, high sensitivity, high safety, etc. The power failure does not alarm by error. The utility model is suitable for rural power networks. The utility model prevents the transformer and lines from theft. The utility model can be also used for anti-theft of doors and windows, fish ponds, orchards, etc.

Description

Power circuit and transformer anti-theft alarm

The utility model belongs to line of electric force or the antitheft field of consumer.

Patent gazette the 7th is rolled up and is disclosed a kind of rheostat power line anti-theft alarm device No. 7, by the impedance conversion sensing circuit, and comparator circuit and warning circuit, equal energy burglar alarm under power failure and the electric power thus supplied to not interference of electrical appliance on every side, and is provided with phase failure power failure demonstration.Its complex structure only is applicable to that three-phase alternating current is not suitable for rural power circuit and transformer anti-theft.

The purpose of this utility model provide a kind of simple in structure, be applicable to the alarm that rural power circuit and transformer anti-theft are used.

The purpose of this utility model is achieved in that a kind of power circuit and transformer anti-theft alarm, and its cardinal principle and structure are that it is made up of control loop, anti-error circuit, warning circuit and package casing; Line of electric force and AC relay J ₁Series connection constitutes control loop; Series direct current relay J between zero line and the ground wire ₂And direct supply, during AC outage, DC relay J ₂Disconnect, constitute anti-error circuit; Direct supply and AC relay J ₁, DC relay J ₂Connect, with music integrated package and the amplifier that is attached thereto, the diode D that is connected in parallel ₃Constitute warning circuit with loudspeaker.

Because the utility model adopts AC-DC relay and line of electric force to form and opens and closes the loop, have advantages such as simple in structure, easy to use, that power saving is safe and reliable, therefore can be installed in the user family, and there is light to show, operating a switch has a power failure advantage such as does not report by mistake, is suitable for rural power circuit and transformer anti-theft and uses.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a schematic diagram of the present utility model.

Fig. 2 is a structural representation of the present utility model.

Among the figure: 1, loudspeaker, 2, pilot lamp, 3, package casing, 4, direct supply, 5, AC relay, 6, DC relay, 7, power supply, 8, switch, 9, timer.

The structure of embodiment of the present utility model is: alarm is made of package casing, and signalization pilot lamp, switch, loudspeaker and timer on the plate face are provided with direct supply and AC relay that is arranged side by side and DC relay in the housing.Its basic circuit annexation is: a DC relay J connects between zero line and the ground wire ₂With 9 volts of direct supplys, DC relay J ₂With the resistance R of connecting ₂With diode D ₂Be connected in series AC relay J between the parallel connection, zero line and live wire ₁, AC relay and the resistance R of connecting ₁With diode D ₁Parallel connection, direct supply and AC relay J ₁, DC relay J ₂Connect.Loudspeaker and diode D ₃Parallel connection is connected with triode, and transistor base is connected with music-integrating block, resistance R ₃Be connected with music-integrating block.

Power circuit and transformer anti-theft alarm are made up of control loop, anti-error circuit, warning circuit and package casing, and loudspeaker, pilot lamp, switch and timer are set on the package casing, line of electric force and AC relay J ₁Series connection constitutes control loop; Series relay J between zero line and the ground wire ₂And direct supply; Direct supply and AC relay J ₁, DC relay J ₂Connect, with music integrated package and the amplifier that is attached thereto, the diode D that is connected in parallel ₃Constitute warning circuit with loudspeaker.

A DC relay J connects between zero line and ground wire ₂With 9 volts of direct supplys, it constitutes the loop by the earth.When alternating current, AC relay J ₁₁Disconnect, control zero line and earth loop cut off direct supply, J simultaneously ₁₂Disconnect, control warning power supply is in the follow-up work state.When having stopped alternating current, direct supply makes DC relay J ₂Normally closed contact disconnects, and control warning power supply alarming does not ring.When the thief cut off line of electric force, zero line was cut off, DC relay J ₂The normally closed contact closure, warning circuit is connected, and music-integrating block is reported to the police.The AC and DC relay plays the alternating current transformation.

Claims

1, a kind of power circuit and transformer anti-theft alarm is characterized in that it is made up of control loop, anti-error circuit, warning circuit and package casing; Line of electric force is connected with AC relay J1 and is constituted control loop; Series relay J between zero line and the ground wire ₂And direct supply, during AC outage, DC relay J ₂Disconnect, constitute anti-error circuit; Direct supply and AC relay J ₁, DC relay J ₂Connect, with music integrated package and the amplifier that is attached thereto, the diode D that is connected in parallel ₃Constitute warning circuit with loudspeaker.