CN202817403U - Leakage protective plug - Google Patents

Leakage protective plug Download PDF

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Publication number
CN202817403U
CN202817403U CN 201220385997 CN201220385997U CN202817403U CN 202817403 U CN202817403 U CN 202817403U CN 201220385997 CN201220385997 CN 201220385997 CN 201220385997 U CN201220385997 U CN 201220385997U CN 202817403 U CN202817403 U CN 202817403U
Authority
CN
China
Prior art keywords
ground wire
contact
shell fragment
zero line
wire
Prior art date
Application number
CN 201220385997
Other languages
Chinese (zh)
Inventor
王建国
Original Assignee
余姚市中建电器有限公司
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 余姚市中建电器有限公司 filed Critical 余姚市中建电器有限公司
Priority to CN 201220385997 priority Critical patent/CN202817403U/en
Application granted granted Critical
Publication of CN202817403U publication Critical patent/CN202817403U/en

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Abstract

The utility model discloses a leakage protective plug which comprises a plug shell, a zero line cord plug, a live wire cord plug, an earth wire cord plug, a contact closing and opening mechanism, an earth wire zero sequence current mutual inductor, a zero line and live wire zero sequence current mutual inductor, a testing circuit, a temperature protective circuit, a ground abnormal indication circuit, a drive circuit and an amplification circuit. The contact closing and opening mechanism comprises an earth wire contact pair, a zero line contact pair, a live wire contact pair, an earth wire spring plate, a zero line spring plate, a live wire spring plate, a pedestal, a pressing plate, a reset button, a main spring, a solenoid coil, an armature, a spring and a block button sheet. According to the utility model, electric shock accidents caused by poor contact of the earth wire contact pair can be prevented. When aftercurrent occurs between zero line and live wire or abnormal current occurs in earth wire, live wire, zero line and earth wire can all be cut off. In addition, during closing, the earth wire contact pair can be closed before closing of the zero line contact pair and the live wire contact pair; and during opening, the opening of the zero line contact pair and the live wire contact pair can be prior to the opening of the earth wire contact pair.

Description

Leakage protecting plug
Technical field
The utility model relates to a kind of leakage protecting plug, and particularly a kind of live wire with ground wire abnormal current measuring ability, zero line, ground wire on-off type leakage protecting plug belong to the protective device technical field of low-voltage electrical apparatus.
Background technology
At present; China's electrical network situation is complicated; exist potential safety hazard more; the appliance socket wiring of family expenses is incorrect, imperfect earth, electric wire are with low quality etc., and power failure can cause electric appliance casing charged; or making ground wire unusually charged, the user continues to make electrical appliance can cause electric shock accidents because not obtaining timely power-off protection or prompting.Indivedual inferior sockets also can be unreliable because of contacting with the latch of plug, and cause plug overheatedly to burn out plug, cause fire, makes leakage protecting plug lose protective effect.The leakage protecting plug major part of visible live wire, zero line, ground wire on-off type is at the additional ground wire contact on-off system of the device of live wire, zero line break-make on the market; although can realize the interlock break-make; but in ground wire contact closure process; the contact reliability of ground wire contact closure is undesirable; ground wire contact power is large not as contact force zero, the live wire contact, the hidden danger of the influential reliable ground of meeting.
The utility model content
The purpose of this utility model provides a kind of apparatus failure or power ground fault of preventing and causes fire, zero, the ground wire on-off type leakage protecting plug of electric shock accidents, guarantees that the ground wire contact is more reliable to contact when the closure.
For achieving the above object; comprise plug body; zero line pin latch; live wire pin latch; the foot of the ground wire latch; contact closure and release mechanism; the ground wire zero sequence current mutual inductor; zero line and live wire zero sequence current mutual inductor; hookup; temperature protection circuit; the unusual indicating circuit of ground connection; drive circuit and amplifying circuit; contact closure and release mechanism comprise ground wire contact pair; zero line contact pair; live wire contact pair; the ground wire shell fragment; the zero line shell fragment; the live wire shell fragment; pedestal; pressing plate; reset key; main spring; solenoid; armature; spring; buckling piece; wherein; described pressing plate is provided with the ground wire contact and clamps the inclined-plane; the spacing inclined-plane of ground wire shell fragment; the ground wire shell fragment is positioned at the zero line shell fragment; the centre of live wire shell fragment; wherein an end is connected with the ground wire moving contact; the other end is connected with the ground wire of load end and is fixed on the pedestal; the unusual indicating circuit of described ground connection is comprised of a resistance and neon lamp; one end of resistance connects the power end of ground wire; the other end of resistance connects an end of neon lamp, and the other end of neon lamp connects the power end of zero line.
Further, above-mentioned ground wire shell fragment is provided with the boss of arc, and when contact closure, the ground wire contact on the pressing plate clamps the boss that the ground wire shell fragment is pushed down on the inclined-plane, and the ground wire moving contact is contacted with the ground wire fixed contact; When contact disconnected, the spacing inclined-plane of ground wire shell fragment on the pressing plate contacted with the boss of ground wire shell fragment, and ground wire moving contact and ground wire fixed contact are disconnected.
Further, above-mentioned ground wire contact clamp the inclined-plane or for face directly, arc surface, sphere; The spacing inclined-plane of described ground wire shell fragment or for face directly, arc surface, sphere.
Further, one end of a secondary output end contact resistance of above-mentioned ground wire zero sequence current mutual inductor, the other end of resistance connects zero, an input of secondary output end of live wire zero sequence current mutual inductor and amplifying circuit, and another secondary output end of ground wire zero sequence current mutual inductor connects zero, another secondary output end of live wire zero sequence current mutual inductor and another input of amplifying circuit.
Further, above-mentioned temperature protection circuit is comprised of a temp control switch, an end of the test switch of an end joint test circuit of temp control switch, the other end of the test switch of the other end joint test circuit of temp control switch.
Compared with prior art; the technical solution of the utility model has the following advantages: ground wire contact pair; the zero line contact to and the right clamping of live wire contact be to realize by different face in the same pressing plate part; three right clamping forces of contact all are to obtain by main spring; thereby the larger contact of clamping force is more reliable; ground wire is connected first; zero; connect behind the live wire; the ground wire contact is to after contacting closure; the right contact force of ground wire contact continues to strengthen, until zero; till the live wire contact, improved the reliability of ground wire contact; during disconnection; zero; live wire disconnects first, disconnects behind the ground wire, realizes the effect of protection personal safety.
Description of drawings
Fig. 1 is the front view of an embodiment of the utility model leakage protecting plug, and its contact mechanism is in closure state;
Fig. 2 is the left view of Fig. 1;
Internal structure schematic diagram when Fig. 3 is ground wire contact of the present utility model to contact;
Fig. 4 is the front view of an embodiment of the present utility model shown in Figure 1, and its contact mechanism is in off-state;
Fig. 5 is the left view of Fig. 4;
The internal structure schematic diagram that Fig. 6 is ground wire contact of the present utility model when separating;
Fig. 7 is the electric theory diagram of an embodiment of the utility model leakage protecting plug;
Fig. 8 is the electrical schematic diagram of an embodiment of the utility model leakage protecting plug.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
Extremely shown in Figure 8 such as Fig. 1; the utility model leakage protecting plug, bag plug body and zero line pin latch, live wire pin latch, foot of the ground wire latch, contact closure and release mechanism, ground wire zero sequence current mutual inductor, zero line and live wire zero sequence current mutual inductor, hookup, temperature protection circuit, the unusual indicating circuit of ground connection, drive circuit and amplifying circuit.
Wherein, contact closure and release mechanism comprise that the ground wire contact is to 3-2 and 9-2, the zero line contact is to 3-1 and 9-1, the live wire contact is to 3-3 and 9-3, ground wire shell fragment 10, zero line shell fragment 4-1, live wire shell fragment 4-2, pedestal 5, pressing plate 6, reset key 1, main spring 2-1 and 2-2, solenoid 14, armature 7, spring 15, buckling piece 13, pressing plate 6 is provided with the ground wire contact and clamps inclined-plane 60, the spacing inclined-plane 600 of ground wire shell fragment, the ground wire contact is to 3-2, the zero line contact on 9-2 and both sides is to 3-1,9-1 and live wire contact are to 3-3, the direction of motion of 9-3 is vertical, ground wire shell fragment 10 is positioned at zero line shell fragment 4-1, the centre of live wire shell fragment 4-2, wherein an end is connected with ground wire moving contact 9-2, and the other end is connected with the ground terminal of load end and is fixed on the pedestal 5.The unusual indicating circuit of ground connection is comprised of a resistance R 7 and neon lamp LP, and an end of resistance R 7 connects the power end of ground wire, and the other end of resistance R 7 connects the end of neon lamp LP, and the other end of neon lamp LP connects the power end of zero line.
The ground wire shell fragment is provided with the boss of arc, and when contact closure, the ground wire contact on the pressing plate 6 clamps the boss 100 that ground wire shell fragment 10 is pushed down on inclined-plane 60, and ground wire moving contact 9-2 is contacted with ground wire fixed contact 3-2; When contact disconnected, the spacing inclined-plane 600 of the ground wire shell fragment on the pressing plate 6 contacted with the boss 100 of ground wire shell fragment 10, and ground wire moving contact 9-2 and ground wire fixed contact 3-2 are disconnected.In the present embodiment, pressing plate 6 is provided with the ground wire contact and clamps inclined-plane 60, the spacing inclined-plane 600 of ground wire shell fragment, also the ground wire contact on the pressing plate 6 can be clamped inclined-plane 60 be made as face directly, arc surface, sphere, also the spacing inclined-plane 600 of the ground wire shell fragment on the pressing plate 6 can be made as face directly, arc surface, sphere.In the present embodiment, reset key 1 is provided with main spring 2-1 and 2-2, also the main spring on the reset key 1 can be made as one or more combinations.
When the leakage protecting plug combined floodgate resets; such as Fig. 1; Fig. 2; shown in Figure 3; the reset key 1 of described contact closure and release mechanism is subjected to external force descending; make main spring 2-1 and 2-2 compressed; until buckling piece 13 inserts the draw-in groove of reset key 1 under the effect of spring 15 elastic force; after withdrawing external force; main spring 2-1 and 2-2 resilience drive reset key 1; buckling piece 13; pressing plate 6 becomes whole up; being located at the boss 100 that the spacing inclined-plane 600 of ground wire shell fragment on the pressing plate 6 moves up to promote ground wire shell fragment 10 swings forward; the spacing inclined-plane 600 of ground wire shell fragment on the boss 100 disengaging pressing plates 6 of ground wire shell fragment 10 is pushed down by ground wire contact clamping inclined-plane 60 simultaneously and is made the ground wire contact closed to 3-2 and 9-2; behind the up LAP of pressing plate 6 continuation this moment, finally make the zero line contact to 3-1 and 9-1 when making the ground wire contact to 3-2 and the increasing of 9-2 contact; the live wire contact is to 3-3 and the closed connection of 9-3.
During leakage protecting plug tripping operation action; such as Fig. 4; Fig. 5; shown in Figure 6; in case leakage current or the ground wire electric current that breaks down appears in the load end of leakage protecting plug; zero sequence current mutual inductor detect and when reaching the threshold values that presets (for example: 6mA); the controllable silicon conducting that is triggered; the solenoid 14 of contact closure and release mechanism gets electric; produce electromagnetic force; armature 7 is subjected to backward mobile dropout of electromagnetic force pulling buckling piece 13; reset key 1 separates with pressing plate 6; reset key 1 is upspring under the elastic force effect of main spring 2-1 and 2-2; pressing plate 6 is at zero line shell fragment 4-1; live wire shell fragment 4-2; the elastic force effect of ground wire shell fragment 10 and descending; make the zero line contact to 3-1 and 9-1; the live wire contact disconnects 3-3 and 9-3; at this moment after pressing plate 6 continues descending LAP; the boss 100 of ground wire shell fragment 10 breaks away from the ground wire contact and clamps inclined-plane 60 under the effect of elastic force; the ground wire contact is disconnected 3-2 and 9-2; the boss 100 of ground wire shell fragment 10 contacts spacing with the spacing inclined-plane 600 of ground wire shell fragment; realize that the zero line contact is to 3-1 and 9-1 in the disconnection of plug; the live wire contact is to 3-3 and 9-3; the ground wire contact is connected 3-2 and 9-2's, for the user provides the Electrical Safety guarantee.
Such as Fig. 7, Fig. 8, in described drive circuit, be provided with a rectifier diode D1, the anode of rectifier diode D1 connects an end of solenoid, another termination load end live wire of this solenoid, the negative electrode of rectifier diode D1 connects the anode of controllable silicon SCR and the power input positive pole of amplifying circuit, and the negative electrode of controllable silicon SCR connects the power end negative pole of load end zero line and amplifying circuit, and the trigger electrode of controllable silicon SCR connects the signal output part of amplifying circuit.Zero, the load end of live wire passes described zero in the same way, the live wire zero sequence current mutual inductor, for detection of the residual current from load end, the output of ground wire passes described ground wire zero sequence current mutual inductor, dangerous currents for detection of the generation of power end ground wire fault, the end of a secondary output end contact resistance R1 of ground wire zero sequence current mutual inductor, the other end of resistance R 1 connects zero, secondary output end of live wire zero sequence current mutual inductor and a signal input part of amplifying circuit, another secondary output end of ground wire zero sequence current mutual inductor connects zero, another secondary output end of live wire zero sequence current mutual inductor and another signal input part of amplifying circuit, can adjust ground wire zero sequence current mutual inductor and zero by the resistance of selecting resistance R 1, the live wire zero sequence current mutual inductor is input to the difference of the signal power of amplifying circuit, set ground wire operating current value and zero, live wire residual action current value, amplifying circuit can amplify processing according to the signal after adjusting, after the signal value of leakage current reaches preset value, trigger the controllable silicon SCR of drive circuit, make the action of contact closure and release mechanism.When the ground wire appearance band electric fault of power end, the voltage difference that ground wire and zero line produce will make neon lamp LP light, until till the fault eliminating, play the warning indicative function.The end of temperature protection switch TS is connected to an end of the switch S of hookup; the other end of temperature protection switch TS is connected to the other end of the switch S of hookup; when using power end socket inferior; when the pin latch of leakage protecting plug and the sleeve loose contact of socket; load current can make pin latch and leakage protecting plug seriously generate heat; in case temperature reaches the preset value of temperature protection switch TS; temperature protection switch TS is just closed; be equivalent to the call through test circuit, make leakage protecting plug tripping operation outage.In sum, above-mentioned execution mode is not to be restricted execution mode of the present utility model, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present utility model or equivalent deformation are all at technology category of the present utility model.

Claims (5)

1. leakage protecting plug; comprise plug body; zero line pin latch; live wire pin latch; the foot of the ground wire latch; contact closure and release mechanism; the ground wire zero sequence current mutual inductor; zero line and live wire zero sequence current mutual inductor; hookup; temperature protection circuit; the unusual indicating circuit of ground connection; drive circuit and amplifying circuit; contact closure and release mechanism comprise ground wire contact pair; zero line contact pair; live wire contact pair; the ground wire shell fragment; the zero line shell fragment; the live wire shell fragment; pedestal; pressing plate; reset key; main spring; solenoid; armature; spring; buckling piece; it is characterized in that: described pressing plate is provided with the ground wire contact and clamps the inclined-plane; the spacing inclined-plane of ground wire shell fragment; the ground wire shell fragment is positioned at the zero line shell fragment; the centre of live wire shell fragment; wherein an end is connected with the ground wire moving contact; the other end is connected with the ground wire of load end and is fixed on the pedestal; the unusual indicating circuit of described ground connection is comprised of a resistance and neon lamp; one end of resistance connects the power end of ground wire; the other end of resistance connects an end of neon lamp, and the other end of neon lamp connects the power end of zero line.
2. leakage protecting plug according to claim 1, it is characterized in that: described ground wire shell fragment is provided with the boss of arc, and when contact closure, the ground wire contact on the pressing plate clamps the boss that the ground wire shell fragment is pushed down on the inclined-plane, and the ground wire moving contact is contacted with the ground wire fixed contact; When contact disconnected, the spacing inclined-plane of ground wire shell fragment on the pressing plate contacted with the boss of ground wire shell fragment, and ground wire moving contact and ground wire fixed contact are disconnected.
3. leakage protecting plug according to claim 1 and 2 is characterized in that: described ground wire contact clamp the inclined-plane or for face directly, arc surface, sphere; The spacing inclined-plane of described ground wire shell fragment or for face directly, arc surface, sphere.
4. leakage protecting plug according to claim 1; it is characterized in that: an end of a secondary output end contact resistance of described ground wire zero sequence current mutual inductor; the other end of resistance connects zero, an input of secondary output end of live wire zero sequence current mutual inductor and amplifying circuit, and another secondary output end of ground wire zero sequence current mutual inductor connects zero, another secondary output end of live wire zero sequence current mutual inductor and another input of amplifying circuit.
5. leakage protecting plug according to claim 1; it is characterized in that: described temperature protection circuit is comprised of a temp control switch; one end of the test switch of one end joint test circuit of temp control switch, the other end of the test switch of the other end joint test circuit of temp control switch.
CN 201220385997 2012-08-04 2012-08-04 Leakage protective plug CN202817403U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220385997 CN202817403U (en) 2012-08-04 2012-08-04 Leakage protective plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220385997 CN202817403U (en) 2012-08-04 2012-08-04 Leakage protective plug

Publications (1)

Publication Number Publication Date
CN202817403U true CN202817403U (en) 2013-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104143736A (en) * 2014-07-15 2014-11-12 东莞市永晟电线有限公司 Electric leakage protection plug
CN104953398A (en) * 2015-06-29 2015-09-30 冯双喜 Plug provided with electricity tester
CN104953319A (en) * 2015-06-24 2015-09-30 冯双喜 Male tab adjustable plug
CN104966965A (en) * 2015-06-29 2015-10-07 冯双喜 Improved plug
CN104966954A (en) * 2015-06-29 2015-10-07 冯双喜 Safety plug
CN104979728A (en) * 2015-06-24 2015-10-14 冯双喜 Novel plug
CN104979666A (en) * 2015-06-24 2015-10-14 冯双喜 Rotatable plug
CN105048218A (en) * 2015-06-15 2015-11-11 冯双喜 Plug facilitating storage
CN105048194A (en) * 2015-06-29 2015-11-11 冯双喜 Power plug with handle
CN105449635A (en) * 2014-05-28 2016-03-30 益而益(集团)有限公司 Electric leakage protector with overtemperature protection device
CN105632801A (en) * 2014-11-04 2016-06-01 施耐德电气(澳大利亚)有限公司 Switch and socket comprising same
WO2018014504A1 (en) * 2016-07-19 2018-01-25 中山市开普电器有限公司 Current leakage protector
CN109462094A (en) * 2018-10-30 2019-03-12 阮鑫 A kind of television set anti-leakage plug

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105449635B (en) * 2014-05-28 2018-12-28 益而益(集团)有限公司 Earth leakage protective device with over-temperature protection device
CN105449635A (en) * 2014-05-28 2016-03-30 益而益(集团)有限公司 Electric leakage protector with overtemperature protection device
CN104143736A (en) * 2014-07-15 2014-11-12 东莞市永晟电线有限公司 Electric leakage protection plug
CN104143736B (en) * 2014-07-15 2017-05-24 东莞市永晟电线科技股份有限公司 Electric leakage protection plug
CN105632801A (en) * 2014-11-04 2016-06-01 施耐德电气(澳大利亚)有限公司 Switch and socket comprising same
CN105048218A (en) * 2015-06-15 2015-11-11 冯双喜 Plug facilitating storage
CN104979666A (en) * 2015-06-24 2015-10-14 冯双喜 Rotatable plug
CN104979728A (en) * 2015-06-24 2015-10-14 冯双喜 Novel plug
CN104953319A (en) * 2015-06-24 2015-09-30 冯双喜 Male tab adjustable plug
CN105048194A (en) * 2015-06-29 2015-11-11 冯双喜 Power plug with handle
CN104966954A (en) * 2015-06-29 2015-10-07 冯双喜 Safety plug
CN104966965A (en) * 2015-06-29 2015-10-07 冯双喜 Improved plug
CN104953398A (en) * 2015-06-29 2015-09-30 冯双喜 Plug provided with electricity tester
WO2018014504A1 (en) * 2016-07-19 2018-01-25 中山市开普电器有限公司 Current leakage protector
CN109462094A (en) * 2018-10-30 2019-03-12 阮鑫 A kind of television set anti-leakage plug

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130320

Termination date: 20180804