CN203339999U - Mining flameproof and intrinsically safe type double loop soft starter - Google Patents
Mining flameproof and intrinsically safe type double loop soft starter Download PDFInfo
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- CN203339999U CN203339999U CN201320443258XU CN201320443258U CN203339999U CN 203339999 U CN203339999 U CN 203339999U CN 201320443258X U CN201320443258X U CN 201320443258XU CN 201320443258 U CN201320443258 U CN 201320443258U CN 203339999 U CN203339999 U CN 203339999U
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Abstract
The utility model provides a mining flameproof and intrinsically safe type double loop soft starter which belongs to the technical field of mining motor double power supply control devices. According to the technical problem to be solved, the coal mine motor soft starter which can smoothly start and can automatically switch when having a fault is provided. According to the adopted technical scheme, two soft starting loops which have the same circuit structure are comprised; according to the circuit structure of the first soft starting loop, the wire outlet end of an isolating change-over switch Q1 is successively connected in series with a first thyristor soft starter and a vacuum contactor K2, and then is connected with three phase output terminals A1, B1 and C1 of the first soft starting loop; a first PLC controller is electrically connected with a first soft starting protector; the first soft starting protector is electrically connected with the first thyristor soft starter; and the first PLC controller in the first soft starting loop and a second PLC controller in the second soft starting loop are connected and carry out communication. The mining flameproof and intrinsically safe type double loop soft starter provided by the utility model is suitable for the coal mine field.
Description
Technical field
The utility model mine flameproof and intrinsic safety type double loop soft starter, belong to mine motor duplicate supply control device technical field.
Background technology
In colliery, electric current during the motor across-the-line starting is generally 4 ~ 7 times of rated current, if the power of motor is smaller so, impact on electrical network is not very large, we just allow its across-the-line starting, but for large-size machine, power is large especially, as its rated current is 100A, it can reach the hundreds of peace at the immediate current of starting, the impact of so large Current on Grid is very large, can the same electrical network of impact with the normal operation of other loads, also can cause certain damage to this equipment during across-the-line starting, also may bring certain fault because of across-the-line starting.
Along with improving constantly of coal in China production mechanization, automaticity, belt feeder, scrapper conveyor move in a large number, solve the soft start of belt feeder, scrapper conveyor, it is the key issue of mine transportation, safety in production, prolongation belt feeder, scrapper conveyor equivalent life, the soft start of using under current domestic coal mine is to implement starting for the separate unit motor mostly, once this equipment breaks down, motor just can't start, across-the-line starting is likely to electrical network, impact equipment on the same group, even because starting current is excessive, burn out equipment, affect down-hole and normally produce.
The utility model content
The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: provide a kind of can smooth starting, and the mining motor soft starter that can automatically switch when fault.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: mine flameproof and intrinsic safety type double loop soft starter, and described double loop soft starter comprises two soft starting loops that circuit structure is identical;
The circuit structure of the first soft starting loop is: inlet wire termination three-phase alternating current binding post U1, V1, the W1 of isolation reversing switch Q1, the leading-out terminal of isolation reversing switch Q1 is connected in series successively the first thyristor soft starter and is connected with the sub-A1 of the three-phase output end of the first soft starting loop, B1, C1 after vacuum contactor K2, and vacuum contactor K1 is attempted by the two ends of the first thyristor soft starter;
The input of control transformer T1 is connected with the leading-out terminal of isolation reversing switch Q1, the power end of the one PLC controller is connected with the output of control transformer T1, the one PLC controller and the electrical connection of the first soft startup protection device, described the first soft startup protection device and above-mentioned the first thyristor soft starter electrical connection;
A PLC controller in the first soft starting loop is connected and carries out communication with the 2nd PLC controller in the second soft starting loop.
Described double loop soft starter is arranged in an anti-explosion box body.
The beneficial effect that the utility model compared with prior art has is: the utility model can provide level and smooth starting conditions when electric motor starting, difference according to power of motor, adjust the start mode of double loop soft start, and can be therein automatically switch to another loop in the situation about breaking down of loop and started, avoid fault due to a loop to cause the motor can not normal starting; The utility model can also start two motors in equipment simultaneously, one main one standby starting, sequential firing, can better adapt to the demand of coal mining system under coal mine.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail:
Fig. 1 is electrical block diagram of the present utility model;
In figure: 1 is that the first thyristor soft starter, 2 is that a PLC controller, 3 is that the first soft startup protection device, 4 is that the 2nd PLC controller, 5 is that the second start protection device, 6 is the second thyristor soft starter.
Embodiment
As shown in Figure 1, the utility model mine flameproof and intrinsic safety type double loop soft starter, described double loop soft starter comprises two soft starting loops that circuit structure is identical: the first soft starting loop and the second soft starting loop.
The circuit structure of described the first soft starting loop is: inlet wire termination three-phase alternating current binding post U1, V1, the W1 of isolation reversing switch Q1, binding post U1, V1, W1 connect the first power supply, the leading-out terminal of isolation reversing switch Q1 is connected in series successively the first thyristor soft starter 1 and is connected with the sub-A1 of the three-phase output end of the first soft starting loop, B1, C1 after vacuum contactor K2, and vacuum contactor K1 is attempted by the two ends of the first thyristor soft starter 1; The input of control transformer T1 is connected with the leading-out terminal of isolation reversing switch Q1; described control transformer T1 can adopt three-phase transformer also can adopt two phase transformer; when control transformer T1 adopts two phase transformer; the any two-phase of input termination isolation reversing switch Q1 leading-out terminal; the power end of the one PLC controller 2 is connected with the output of control transformer T1; the one PLC controller 2 and the first soft startup protection device 3 electrical connections, described the first soft startup protection device 3 and above-mentioned the first thyristor soft starter 1 electrical connection.
The circuit structure of described the second soft starting loop is identical with the first soft starting loop, the second soft starting loop passes through binding post U2 by the end of incoming cables of isolation reversing switch Q2, V2, W2 is connected with second source, described second source is the different power supply of colliery two-way with the first power supply, the leading-out terminal of isolation reversing switch Q2 is connected in series after the second thyristor soft starter 6 and vacuum contactor K4 and the sub-A2 of the three-phase output end of the second soft starting loop successively, B2, C2 is connected, vacuum contactor K3 is attempted by the two ends of the second thyristor soft starter 6, the 2nd PLC controller 4 is by the second soft startup protection device 5 and above-mentioned the second thyristor soft starter 6 electrical connections, the 2nd PLC controller 4 is powered by control transformer T2.
Above-mentioned soft starter is a kind of device that is used for controlling AC asynchronous motor, it is the soft start of a kind of current collection machine, soft stop, light-load energy saving and multi-protective function are in the motor control assembly of one, the main composition of soft starter is three-phase anti-parallel thyristor and the electronic control circuit thereof be serially connected with between power supply and controlled motor, use diverse ways, control the angle of flow of three-phase inverse parallel brake tube, the input voltage of controlled motor is changed by different requirements, just can realize different functions, control the angle of flow of its inner thyristor, make the motor input voltage increase gradually with the preset function relation from zero, until proceed-to-send, give the motor full voltage, be soft start, in Soft Start-up Process, the electric motor starting torque increases gradually, rotating speed also increases gradually, certainly reducing the asynchronous motor starting size of current can realize by reducing stator voltage or increase resistance and leakage reactance, so reduced voltage starting is just arranged, the starting methods such as the anti-starting of crosstalk and resistance adjustment, wherein squirrel-cage asynchronous motor can't external additional resistance because of rotor loop, considers operational efficiency, also should not be designed to larger rotor resistance, so for the mechanical load that does not need very large starting torque, available step-down starting method.
A PLC controller 2 in above-mentioned the first soft starting loop is connected and carries out communication with the 2nd PLC controller 4 in the second soft starting loop, the utility model can provide level and smooth starting conditions when electric motor starting, difference according to power of motor, adjust the start mode of double loop soft start, and can be therein automatically switch to another loop in the situation about breaking down of loop and started, avoid fault due to a loop to cause the motor can not normal starting; The utility model can also start two motors in equipment simultaneously, one main one standby starting, sequential firing, can better adapt to the demand of coal mining system under coal mine.
Described double loop soft starter is arranged in an anti-explosion box body; described anti-explosion box body is symmetrical set; be provided with inlet wire outlet casing, isolation reversing switch case and protection control cabinet in anti-explosion box body; above-mentioned vacuum contactor,, the rc absorber in control transformer, soft starter, PLC controller, soft startup protection device and soft starter all can be arranged in above-mentioned protection control cabinet, anti-explosion box body can guarantee the application in colliery.
The above is explained in detail embodiment of the present utility model by reference to the accompanying drawings, but the utility model is not limited to above-described embodiment, in the ken possessed those of ordinary skills, can also under the prerequisite that does not break away from the utility model aim, make various variations.
Claims (2)
1. mine flameproof and intrinsic safety type double loop soft starter, it is characterized in that: described double loop soft starter comprises two soft starting loops that circuit structure is identical;
The circuit structure of the first soft starting loop is: inlet wire termination three-phase alternating current binding post U1, V1, the W1 of isolation reversing switch Q1, the leading-out terminal of isolation reversing switch Q1 is connected in series successively the first thyristor soft starter (1) and is connected with the sub-A1 of the three-phase output end of the first soft starting loop, B1, C1 after vacuum contactor K2, and vacuum contactor K1 is attempted by the two ends of the first thyristor soft starter (1);
The input of control transformer T1 is connected with the leading-out terminal of isolation reversing switch Q1, the power end of the one PLC controller (2) is connected with the output of control transformer T1, the one PLC controller (2) and the first soft startup protection device (3) electrical connection, described the first soft startup protection device (3) and above-mentioned the first thyristor soft starter (1) electrical connection;
A PLC controller (2) in the first soft starting loop is connected and carries out communication with the 2nd PLC controller (4) in the second soft starting loop.
2. mine flameproof and intrinsic safety type according to claim 1 double loop soft starter, it is characterized in that: described double loop soft starter is arranged in an anti-explosion box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320443258XU CN203339999U (en) | 2013-07-24 | 2013-07-24 | Mining flameproof and intrinsically safe type double loop soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320443258XU CN203339999U (en) | 2013-07-24 | 2013-07-24 | Mining flameproof and intrinsically safe type double loop soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339999U true CN203339999U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320443258XU Expired - Lifetime CN203339999U (en) | 2013-07-24 | 2013-07-24 | Mining flameproof and intrinsically safe type double loop soft starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203339999U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967206A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Coal mine low voltage double loop dual supply permanent magnet feed interconnection switch operating circuit |
| CN105846723A (en) * | 2016-04-29 | 2016-08-10 | 山西际安电气有限公司 | Mine explosive-proof intrinsically safe dual-circuit vacuum electromagnetic starter |
| CN106672481A (en) * | 2017-01-05 | 2017-05-17 | 中化兴中石油转运（舟山）有限公司 | Intrinsic safety fire detecting line, explosion-proof fire alarm and linkage device |
-
2013
- 2013-07-24 CN CN201320443258XU patent/CN203339999U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967206A (en) * | 2015-05-29 | 2015-10-07 | 山西际安电气有限公司 | Coal mine low voltage double loop dual supply permanent magnet feed interconnection switch operating circuit |
| CN104967206B (en) * | 2015-05-29 | 2018-04-17 | 山西际安电气有限公司 | Colliery low pressure double loop dual power supply permanent magnetism feed interconnection switch operating circuit |
| CN105846723A (en) * | 2016-04-29 | 2016-08-10 | 山西际安电气有限公司 | Mine explosive-proof intrinsically safe dual-circuit vacuum electromagnetic starter |
| CN106672481A (en) * | 2017-01-05 | 2017-05-17 | 中化兴中石油转运（舟山）有限公司 | Intrinsic safety fire detecting line, explosion-proof fire alarm and linkage device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |