CN202102069U - Electric leakage locking detection device - Google Patents
Electric leakage locking detection device Download PDFInfo
- Publication number
- CN202102069U CN202102069U CN2011200917756U CN201120091775U CN202102069U CN 202102069 U CN202102069 U CN 202102069U CN 2011200917756 U CN2011200917756 U CN 2011200917756U CN 201120091775 U CN201120091775 U CN 201120091775U CN 202102069 U CN202102069 U CN 202102069U
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- Prior art keywords
- circuit
- resistance
- over switch
- double
- pick
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- Expired - Fee Related
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present utility model discloses an electric leakage locking detection device. The device comprises a circuit device and a shell for sealing, the circuit device is arranged and sealed inside the shell as a whole, and the circuit device comprises an insurance circuit, a double contact change over switch, a detection selection circuit, a contactor adhesion detection circuit, an operation comparison circuit, a DC-CD isolation circuit and an alarm circuit. In the device, by adopting the optoelectronic isolation technology and the magnetic coupling technology, a ground insulation detection loop and a heading machine control circuit of a heading machine working motor are safely insulated. The device is small in volume, is provided with the shell, is convenient, rapid, safe and reliable in use, and the safety of the heading machine working under mines is increased.
Description
Technical field
The utility model relates to a kind of earth leakage search/lockout pick-up unit, particularly a kind of earth leakage search/lockout pick-up unit that is used to detect development machine work drive motor Leaked Current of Line to Ground situation.
Background technology
Leaked Current of Line to Ground detection technique great majority in the past directly are connected major loop with testing circuit.For example: in case the generation insulation reduces, major loop has induction electromotive force and contactor adhesion, high pressure all might be scurried into control loop, control loop is burnt, thereby cause major accident.Most pick-up units suffer the down-hole pollution caused by coal dust easily for exposed device, cause fault.
The utility model content
Suffer high pressure to burn and be subject to the technical matters of pollution caused by coal dust easily in order to solve existing Leaked Current of Line to Ground pick-up unit, the utility model provides a kind of high pressure that can effectively prevent to get into pick-up unit, can avoid the earth leakage search/lockout pick-up unit of pollution caused by coal dust simultaneously.
In order to solve the problems of the technologies described above; The basic technical scheme of the utility model is: a kind of earth leakage search/lockout pick-up unit; Comprise circuit arrangement and the housing that is used to seal; Described circuit arrangement integral installation is sealed in the housing; Circuit arrangement comprises insurance circuit, double-contact change-over switch, detects and select circuit, contactor adhesion testing circuit, computing comparator circuit, DC-DC buffer circuit and warning circuit; The output terminal of described high pressure insurance circuit is connected to double-contact change-over switch that detect to select circuit to control, and a contact of described double-contact change-over switch is connected to detect selects circuit, the double-contact change-over switch another contact in turn be connected in series computing comparator circuit, DC-DC buffer circuit and warning circuit.
As one of improvement project of the utility model basic technical scheme: described high pressure insurance circuit comprises first resistance, second resistance, the 3rd resistance of series connection successively; And first resettable fuse, second resettable fuse, the 3rd resettable fuse of series connection successively, described first resettable fuse, second resettable fuse, the 3rd resettable fuse and first resistance, second resistance, the 3rd resistance are parallelly connected.
Described a kind of earth leakage search/lockout pick-up unit, described detection select circuit to comprise a relay, and described relay connects and control double-contact change-over switch.
Described a kind of earth leakage search/lockout pick-up unit, described contactor adhesion testing circuit comprises an electric parameters transducer, described electric parameters transducer is connected to a contact of double-contact change-over switch.
Described a kind of earth leakage search/lockout pick-up unit; Described warning circuit comprises an optocoupler; Described optocoupler comprises a light emitting diode and phototriode, and described light emitting diode is connected to the computing comparator circuit, and described phototriode is connected to the DC-DC buffer circuit.
Beneficial effect
The utility model detects photoelectric coupling technology and magnetic coupling application to the insulation against ground of development machine work drive motor in; And adopted power isolation module, and the test side power supply and the power supply of control loop are also isolated fully, prevented that effectively high pressure from getting into pick-up unit and its phenomenon of burning is taken place; The utility model is fixedly mounted on circuit arrangement in the plastic casing simultaneously; Effectively prevented the pollution of coal dust, also increased the adhesion measuring ability, detected major loop during work earlier and whether connect sticking; Guarantee to carry out next step detection again under the situation that major loop breaks off, make it safer.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the electrical schematic diagram of the utility model;
Wherein, R21 is that first resistance, R22 are that second resistance, R23 are the 3rd resistance, and F1 is that first resettable fuse, F2 are that second resettable fuse, F3 are the 3rd resettable fuse, and U9 is an optocoupler.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Referring to Fig. 1,, Fig. 2, the utility model comprises circuit arrangement and the plastic casing that is used to seal, the circuit arrangement integral installation is sealed in the plastic casing, can prevent dust, and attractive in appearance, convenient maintenance and replacement.Circuit arrangement comprises high pressure insurance circuit, double-contact change-over switch, detects and select circuit, contactor adhesion testing circuit, computing comparator circuit, DC-DC buffer circuit and warning circuit; The output terminal of high pressure insurance circuit is connected to and detects the double-contact change-over switch of selecting circuit to control; A contact of double-contact change-over switch is connected to detect to select circuit, the double-contact change-over switch another contact in turn be connected in series computing comparator circuit, DC-DC buffer circuit and warning circuit.
First resistance R 21, second resistance R 22, the 3rd resistance R 23 and the first resettable fuse F1, the second resettable fuse F2, the 3rd resettable fuse F3 form the high pressure insurance circuit.If resettable fuse fusing when having high pressure to get into, resistance constitutes current circuit and shields.
Contactor adhesion testing circuit mainly is made up of an electric parameters transducer, if contactor sticks together, transmitter can produce d. c. voltage signal of output.
Isolated from power partly is to be made up of DC-DC power isolation module and an optocoupler; It is through the principle of magnetic coupling and optically-coupled the output of computing circuit to be kept apart from electric; Electric signal and the computing circuit of output do not have being connected on electric; But through non-dielectric matter, signal is transmitted in light or magnetic field, enters into testing circuit with regard to high pressure and also can the interface circuit of output not damaged with regard to last like this.
The computing comparator circuit comprises that operational amplifier and resistance, electric capacity forms, and whether the insulation values that this circuit energy measurement goes out testing circuit meets the demands.
When work, the input of module is connected with loop to be detected, selects to be connected to adhesion testing circuit exclusive disjunction comparator circuit through the switching of relay.The adhesion testing circuit be utilize electric parameters transducer to detect alternating voltage to judge whether contactor connects sticking.The computing comparator circuit is that loop to be detected is added DC voltage, and whether the insulation values of declaring loop to be detected through voltage ratio meets the demands.Computing comparator circuit output high level does not make the light emitting diode conducting of optocoupler U9 luminous if do not meet the demands, phototriode conducting OUT2 output alarm signal.
Claims (5)
1. earth leakage search/lockout pick-up unit; It is characterized in that: comprise circuit arrangement and the housing that is used to seal; Described circuit arrangement integral installation is sealed in the housing; Circuit arrangement comprises insurance circuit, double-contact change-over switch, detects and select circuit, contactor adhesion testing circuit, computing comparator circuit, DC-DC buffer circuit and warning circuit; The output terminal of described insurance circuit is connected to double-contact change-over switch that detect to select circuit to control, and a contact of described double-contact change-over switch is connected to detect selects circuit, the double-contact change-over switch another contact in turn be connected in series computing comparator circuit, DC-DC buffer circuit and warning circuit.
2. a kind of earth leakage search/lockout pick-up unit according to claim 1; It is characterized in that: described insurance circuit comprises first resistance, second resistance, the 3rd resistance of series connection successively; And first resettable fuse, second resettable fuse, the 3rd resettable fuse of series connection successively, described first resettable fuse, second resettable fuse, the 3rd resettable fuse and first resistance, second resistance, the 3rd resistance are parallelly connected.
3. a kind of earth leakage search/lockout pick-up unit according to claim 1 is characterized in that: described detection selects circuit to comprise a relay, and described relay connects and control double-contact change-over switch.
4. a kind of earth leakage search/lockout pick-up unit according to claim 1 is characterized in that: described contactor adhesion testing circuit comprises an electric parameters transducer, and described electric parameters transducer is connected to a contact of double-contact change-over switch.
5. a kind of earth leakage search/lockout pick-up unit according to claim 1; It is characterized in that: described warning circuit comprises an optocoupler; Described optocoupler comprises a light emitting diode and phototriode; Described light emitting diode is connected to the computing comparator circuit, and described phototriode is connected to the DC-DC buffer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200917756U CN202102069U (en) | 2011-03-31 | 2011-03-31 | Electric leakage locking detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200917756U CN202102069U (en) | 2011-03-31 | 2011-03-31 | Electric leakage locking detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102069U true CN202102069U (en) | 2012-01-04 |
Family
ID=45388074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200917756U Expired - Fee Related CN202102069U (en) | 2011-03-31 | 2011-03-31 | Electric leakage locking detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202102069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197194A (en) * | 2013-03-28 | 2013-07-10 | 山西潞安矿业(集团)有限责任公司 | Earth leakage lockout detecting circuit |
| CN113765052A (en) * | 2021-09-18 | 2021-12-07 | 国网山东省电力公司东营市河口区供电公司 | Multi-loop reusable leakage locking device |
-
2011
- 2011-03-31 CN CN2011200917756U patent/CN202102069U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197194A (en) * | 2013-03-28 | 2013-07-10 | 山西潞安矿业(集团)有限责任公司 | Earth leakage lockout detecting circuit |
| CN103197194B (en) * | 2013-03-28 | 2015-07-22 | 山西潞安矿业(集团)有限责任公司 | Earth leakage lockout detecting circuit |
| CN113765052A (en) * | 2021-09-18 | 2021-12-07 | 国网山东省电力公司东营市河口区供电公司 | Multi-loop reusable leakage locking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20150331 |
|
| EXPY | Termination of patent right or utility model |