CN2219556Y - Safety leader circuit controller - Google Patents
Safety leader circuit controller Download PDFInfo
- Publication number
- CN2219556Y CN2219556Y CN 93248041 CN93248041U CN2219556Y CN 2219556 Y CN2219556 Y CN 2219556Y CN 93248041 CN93248041 CN 93248041 CN 93248041 U CN93248041 U CN 93248041U CN 2219556 Y CN2219556 Y CN 2219556Y
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- branch road
- starting
- self
- button
- essential safety
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Abstract
The utility model discloses an intrinsically safe leading circuit controller, which can be widely used in various specifications of flame-proof and intrinsically safe magnetic starter. The main problem the utility model needs to solve is that when a connection wire which is arranged between a starter and a remote control button box is shorted or generates a failure, a self-starting accident can arise. The main technical characteristic is that the utility model is provided with a starting branch circuit, a self-protecting stop branch circuit and a failure stop branch circuit which are connected in parallel and then connected in series with a DC relay and the intrinsically safe winding of an intrinsically safe transformer. The main technical principle is that when a DC loop is switched on the DC relay is attracted, when an AC loop is switched on or the DC relay circuit is switched off, the DC relay is released, and thus the opening and closing of a motor is controlled.
Description
The utility model relates to a kind of Flameproof intrinsically safe magnetic starter, is the essential safe type leading control circuit device in the type starter.
The typical structure of present known essential safe type guiding electric controlling system road device is by essential safety transformer, control relay assembly, and distant place control button box is closely controlled starting button and nearly control stop button is formed.Effect is: realize magnetic starter under coal mine far away, in-plant safe starting and stop by controlled motor.Its prior art be with essential safety transformer, control relay group, closely control starting button, closely control stop button and be contained in the starter.In the control button box of a distant place starting button, stop button and rectifier diode are housed.It is electrically connected element under the essential safe type leading control circuit device in distant place control button box and the starter feature and is: connect with stop button, rectifier diode in the control button box of a distant place after will being contained in starting button parallel connection in self holding contact and the distant place control button box in the starter by three-core cable again.The practical circuit of prior art and situation about being applied in the magnetic starter can be from TSBN7-5338-0280-9/TD.1 " mining mechanization equipment O﹠M " the 5th fascicle, electric equipments; Chapter 4, consult in the mining magnetic force device.
The technical problem that above-mentioned essential safe type leading control circuit device exists is: when connecting the cable core generation short circuit fault at control starting button far away two ends, promptly the self-starting accident can be taken place by controlled motor.And, can't be stopped by controlled motor as not pressing stop button all the time or cable being broken.Therefore use dangerous.
The purpose of this utility model provides a kind of essential safe type leading control circuit device, when it can not only prevent the external cable short circuit reliably, and controlled motor self-staring, and when cable break, can make by controlled motor to stop automatically or fail to start.
The purpose of this utility model is achieved in that
1. design philosophy: earlier circuit design is become can satisfy following two conditions:
A. circuit relay electrical equipment is direct current relay, when flowing through direct current in the circuit, and normally adhesive; When flowing through alternating current, can not adhesive.
B. essential safety Circuit Fault on Secondary Transformer winding promptly supplies the winding (being called for short the essential safety winding) of intrinsically safe circuit power supply, internal resistance is big, during online winding two ends direct short-circuit, not only can not burn, and still can the meet GB 3836.4-83 requirement of " explosive atmosphere electrical apparatus for explosive atmospheres: essential safe type circuit and electric equipment " i " ".
On above-mentioned two guaranteed bases of condition, further circuit design is become when mutual short circuit fault takes place cable core, rectifier cell in the circuit is simultaneously by short circuit, make direct current relay can not get direct current and can't adhesive or can't sticking, thereby reach when avoiding, the self-starting accident occurs because of cable short circuit fault.
2. concrete measure: utilize prior art, basic structure is constant, and promptly the utility model is still essential safety transformer, control relay group, nearly control are contained in the starter with starting button, stop button, is connected with distant place control button box by cable.In the control button box of a distant place starting button, stop button and rectifier diode are housed still.But compared with the prior art, the utility model changes the element design parameter by design philosophy except that need, and its key feature is:
Control circuit far away partly be by starter branch road, self-insurance stop branch road and fault stop branch road parallel with one another after, by essential safety winding, the direct current relay of the essential safety transformer in cable and the starter formation of connecting, stop in the branch road all in starter branch road and self-insurance that string has rectifier cell, the stop button in the circuit is by a pair of make contact and a pair ofly movingly open the contact and form.The feature of wherein starting branch road is that this branch road mainly is made of starting button and rectifier diode series connection; The feature that self-insurance stops branch road is, this branch road is mainly opened self holding contact in contact and the starter and rectifier diode and connected and constitute by being contained in moving on the stop button; The feature that fault stops branch road is, having only an element in this branch road is a pair of make contact on the stop button.
Owing to be connected into series circuit by cable and direct current relay etc. after two above-mentioned branch road parallel connections, because starting branch road and self-insurance stop branch road rectifier diode is arranged all again, so after starting branch road or self-insurance stop branch road and are switched on, direct current relay promptly provides power supply by the intrinsic safety transformer, obtain direct current and adhesive or suction spy through rectification one utmost point pipe rectification, thereby make controlled motor operation.If heart yearn is by short circuit in the cable, the rectifier diode in the circuit is promptly by short circuit, and therefore direct current relay can not get direct current, and can not adhesive or can not sticking, also just the self-starting accident can not be taken place by controlled motor.Fault stops branch road also according to the principle of uniformity design, promptly is not the way of the common open circuit that is adopted.But adopt the short circuit rectifier diode to make direct current relay lose direct current and discharge, with the purpose that realizes stopping.
Cable is if there is heart yearn to disconnect, and direct current relay will can not adhesive because of dead electricity, makes by controlled motor to stop.
The utility model is because the measure that proposes is simple, do not increase cost, solved fully that prior art exists can not prevent controlled motor cable generation short circuit fault the time problem of self-starting accident appears, and can be widely used in the Flameproof intrinsically safe magnetic starter of all size as essential safe type leading control circuit device, therefore practicality of the present utility model is sure.
Below in conjunction with accompanying drawing and example the utility model is further specified.
Fig. 1 is according to a kind of use essential safe type leading control circuit manipulated or operated apparatus higher than reliability that the utility model proposes.
1. in the example shown in Figure 1, the utility model by essential safety transformer T, control relay assembly A, closely control starting button S2, closely control stop button S3, far control button box A2 and form.
2. the secondary side winding of the intrinsic safety transformer T among Fig. 1 is the essential safety winding, should be designed to high internal resistance.Need to guarantee the two ends of direct short circuit winding, not only should not burn, and circuit still need meet the requirement of essential safety performance.
3. the control relay assembly A1 among Fig. 1 is made up of direct current relay K, capacitor C, far and near control change over switch S1 and rectifier diode V1.Wherein capacitor C is connected in parallel with direct current relay K.
4. the self holding contact Kn among Fig. 1 can be the make contact of direct current relay, also can be the auxiliary relay in the starter or the make contact of contactor.
5. the control starting button A2 far away among Fig. 1 is made up of starting button S4, stop button S5, rectifier diode V2.Wherein stop button S5 is one and has a pair of make contact and a pair of moving button of contact of opening.
6. the structural member among Fig. 1 is except that control button box A2 far away, and all the other structural members are installed in the starter shell, and the connection between them is to connect and circuit by Fig. 1 by three-core cable.
7. circuit working principle:
7.1 control starting far away: distance is controlled change over switch S1 beat, push distant place starting button S4 to control far away, the conducting of starting branch road, direct current relay K gets electric adhesive, makes controlled motor starting.After the direct current relay K adhesive, self holding contact Kn is promptly closed, and self-insurance stops the branch road conducting, and direct current relay K changes the sticking state over to, makes by controlled motor to keep operating condition.
7.2 control far away normally stops: under the circuit normal condition, push stop button S5, the moving contact of opening on the S5 disconnects, and self-insurance stops the branch road dead electricity, and direct current relay K discharges, and makes by controlled motor to stop.
7.3 fault stops: if when No. 1, cable and No. 2 heart yearn generation short circuit faults, at this moment the moving contact of opening on the stop button S5 is also by short circuit, so lose hold function, but when pushing stop button S5, the moving contact of opening on the S5 is switched on simultaneously, make No. 1, No. 2, No. 3 mutual short circuits of heart yearn of cable, direct current relay K can not get direct current and discharges, and makes by controlled motor to stop.
7.4 nearly control: principle and prior art are basic identical.
8. the self-starting situation analysis appears when avoiding because of cable short circuit fault
If No. 1, cable and No. 3 heart yearn generation short circuit faults, stop rectifier cell V2, V1 in the branch road by short circuit because of starting branch road and self-insurance, direct current relay K because of the end obtains direct current can not adhesive or release.
If No. 2, cable and No. 3 heart yearn generation short circuit faults, because of No. 1, cable and No. 2 heart yearns under normal circumstances are stopped the moving contact institute short circuit of opening on the button S5, so be actually three heart yearns of cable all by short circuit, as a same reason, direct current relay K can not adhesive or release.
If No. 1, cable and No. 2 heart yearn generation short circuit faults, the moving contact of opening that is equivalent on the stop button S5 is closed all the time, can not play normal hold function, but can motor be stopped by the make contact closure on the stop button S5.Have no effect for the starting branch road in addition.This shows, No. 1 heart yearn of cable among Fig. 1 and No. 2 heart yearns can be merged into a heart yearn, remove the moving contact of opening on the stop button S5, then the circuit diagram of Fig. 1 embodiment can be varied to as shown in Figure 2.Fig. 1 embodiment is adopted in suggestion, mainly is because implement than implementing more safe and reliable by Fig. 2 by Fig. 1.
Claims (4)
1. essential safety leading control circuit device that is used for the Flameproof intrinsically safe magnetic starter, by essential safety transformer T, control relay assembly A1, distant place control button box A2, closely control starting button S2 and closely control stop button S3 and form, it is characterized in that: control circuit far away partly be by starting branch road, self-insurance stop branch road and fault stop branch road interrelated after, the formation of connecting of essential safety winding, the direct current relay K by the essential safety transformer T in cable and the starter; Stopping in the branch road all in starting branch road and self-insurance, string has rectifier cell; Stop button S5 in the circuit is by a pair of make contact and a pair ofly moving open the contact and form.
2. according to claim 1, essential safety leading control circuit device is characterized in that: a starting route starting button S4 and rectifier diode V2 series connection constitute
3. according to claim 1, essential safety leading control circuit device is characterized in that: self-insurance stops branch road and mainly opens self holding contact Kn in contact and the starter and rectifier diode V1 by moving on the stop button S5 and connect and constitute.
4. according to claim 1, essential safety leading control circuit device is characterized in that: fault stops branch road and has only an element, i.e. a pair of make contact on the stop button S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93248041 CN2219556Y (en) | 1993-12-23 | 1993-12-23 | Safety leader circuit controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93248041 CN2219556Y (en) | 1993-12-23 | 1993-12-23 | Safety leader circuit controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2219556Y true CN2219556Y (en) | 1996-02-07 |
Family
ID=33820297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93248041 Expired - Fee Related CN2219556Y (en) | 1993-12-23 | 1993-12-23 | Safety leader circuit controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2219556Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826714A (en) * | 2010-03-09 | 2010-09-08 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN103293980A (en) * | 2013-05-29 | 2013-09-11 | 江苏创导自动化设备有限公司 | Mine intrinsic-safety-type direct-current guide circuit with fault self-diagnostic function |
| CN108983669A (en) * | 2018-08-06 | 2018-12-11 | 北方工业大学 | Intrinsic safety pilot circuit |
-
1993
- 1993-12-23 CN CN 93248041 patent/CN2219556Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826714A (en) * | 2010-03-09 | 2010-09-08 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN101826714B (en) * | 2010-03-09 | 2012-07-25 | 天津市天矿电器设备有限公司 | Intrinsically-safe type control device |
| CN103293980A (en) * | 2013-05-29 | 2013-09-11 | 江苏创导自动化设备有限公司 | Mine intrinsic-safety-type direct-current guide circuit with fault self-diagnostic function |
| CN103293980B (en) * | 2013-05-29 | 2015-07-08 | 江苏创导自动化设备有限公司 | Mine intrinsic-safety-type direct-current guide circuit with fault self-diagnostic function |
| CN108983669A (en) * | 2018-08-06 | 2018-12-11 | 北方工业大学 | Intrinsic safety pilot circuit |
| CN108983669B (en) * | 2018-08-06 | 2020-11-17 | 北方工业大学 | Intrinsic safety pilot circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |