CN201399376Y - Control circuit of magnet separator in powder coal milling system in power plant - Google Patents
Control circuit of magnet separator in powder coal milling system in power plant Download PDFInfo
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- CN201399376Y CN201399376Y CN2009200724120U CN200920072412U CN201399376Y CN 201399376 Y CN201399376 Y CN 201399376Y CN 2009200724120 U CN2009200724120 U CN 2009200724120U CN 200920072412 U CN200920072412 U CN 200920072412U CN 201399376 Y CN201399376 Y CN 201399376Y
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Abstract
The utility model discloses a control circuit of a magnet separator in a powder coal milling system in a power plant. The control circuit is characterized in that a time circulation relay, a circulation activating button and a circulation stoppage button which are connected in series sequentially are added to the control circuit of an original magnet separator, and are then connected to a two-phase power supply; self-locking contacts of the time circulation relay are connected with two ends of the circulation activating button, so as to form a time circulation control loop; a motor control loop comprises a normally closed contact of an overcurrent protector, a normally closed contact of the time circulation relay, an activating button, a stoppage button and a main contactor coil, which areconnected in series in sequence and connected to the two-phase power supply; and a self-locking contact of the main contactor and a normally opened contact of the time circulation relay are connectedin parallel to two ends of the activating button. The control circuit enables the magnet separator to work in an intermittent way, thereby improving the service lives of various other components of the magnet separator, and reducing the manufacture and overhaul costs.
Description
Technical field
The utility model relates to the control circuit of magnetic separator in a kind of power plant coal dust pulverized coal preparation system.
Background technology
The coal dust pulverized coal preparation system is an important component part of power plant's production system.Wherein the normal operation of magnetic separator is the main means that assurance enters the fuel mass of coal bunker, and the quality of its operation directly has influence on the safe operation of pulverized coal preparation system.
Magnetic separator utilizes ferromagnetic principle to separate ferromagnetic material in the coal.Magnetic separator rotates by driven by motor driving chain head roll, and cylinder drives the magnetic belt and constantly rotates, and by the ferromagnetic material in the magnetic belt absorption coal dust, the ferromagnetic material that will be adsorbed on the belt shifts out magnetic field then, falls into Chu Tiexiang behind the loss of excitation.
Usually the running status of magnetic separator is synchronous with the running status of coal conveyer belt, moves the process that stops to operation of beginning from coal conveyer belt exactly, and magnetic separator also is to move always, will move 18 hours in general one day.Its control circuit is the most basic circuit for controlling motor, motor is connected to the three phase terminals of power switch output by the three-phase contact of overcurrent protector and main contactor, after connecting successively, the normally-closed contact of main contactor, overcurrent protector, start button and stop button be connected to the two-phase end of power switch output, the self-holding contact of main contactor is connected in parallel to the start button two ends simultaneously, and above-mentioned control circuit is controlled the operation of motor and stopped; Magnetic separator causes equipment consumable accessory wearing and tearing aggravation with the high frequency operation of coal conveyer belt, shortened the time between overhauls(TBO) of equipment, and easily cause the equipment damage of parts in addition, the general device operation will be changed driving chain No. one time in 2 to 3 months, cause the raising of the production cost and the cost of overhaul.
Summary of the invention
Technical problem to be solved in the utility model provides the control circuit of magnetic separator in a kind of power plant coal dust pulverized coal preparation system, utilize this control circuit can make the work of magnetic separator gap, to have improved the service life of each other parts of magnetic separator, the production and the cost of overhaul have been reduced.
For solving the problems of the technologies described above, the control circuit of magnetic separator comprises power switch, motor, main contactor, overcurrent protector, start button, stop button in the utility model power plant coal dust pulverized coal preparation system, described power switch connects three phase mains, described motor connects three-phase contact one end of described main contactor by described overcurrent protector, and the other end of main contactor three-phase contact connects the output of power switch by first fuse; Also comprise time circulation relay; circulation is released the button and cycle stop push button; described time circulation relay has normally opened contact; normally-closed contact and self-holding contact; the normally-closed contact of described overcurrent protector; the normally-closed contact of time circulation relay; stop button; after connecting successively, start button and main contactor coil be connected to the two-phase end of described power switch output by second fuse; the normally opened contact of the self-holding contact of described main contactor and time circulation relay is connected in parallel to the two ends of described start button; described circulation is released the button; be connected to the two-phase end of described power switch output after cycle stop push button and time circulation relay are connected successively, the self-holding contact of described time circulation relay is connected in parallel to the two ends that described circulation is released the button.
For improving the reliability of this control circuit, the normally opened contact of above-mentioned time circulation relay and normally-closed contact adopt the push button contact.
Because the control circuit of magnetic separator has adopted technique scheme in the utility model power plant coal dust pulverized coal preparation system, promptly in the control circuit of former magnetic separator, increase time circulation relay, circulation is released the button and cycle stop push button and be connected to the two-phase power supply after the series connection successively, the self-holding contact of time circulation relay is connected to the circulation two ends of releasing the button, above-mentioned formation time loop control loop; Motor control loop comprises that normally-closed contact, the normally-closed contact of time circulation relay, start button, stop button, the main contactor coil of overcurrent protector are connected to the two-phase power supply after connecting successively, and the normally opened contact of the self-holding contact of main contactor and time circulation relay is connected in parallel to the two ends of start button; This control circuit can make the work of magnetic separator gap, has improved the service life of each other parts of magnetic separator, has reduced the production and the cost of overhaul.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the control circuit figure of magnetic separator in the utility model power plant coal dust pulverized coal preparation system.
The specific embodiment
As shown in Figure 1, the control circuit of magnetic separator comprises power switch QS, motor M, main contactor KM, overcurrent protector FR, start button SB2, stop button SB1 in the utility model power plant coal dust pulverized coal preparation system, described power switch QS connects three phase mains, described motor M connects three-phase contact KM1 one end of described main contactor KM by described overcurrent protector FR, and the other end of main contactor three-phase contact KM1 connects the output of power switch QS by the first fuse FU1; Also comprise time circulation relay ST; circulation release the button SB4 and cycle stop push button SB3; described time circulation relay ST has normally opened contact ST3; normally-closed contact ST2 and self-holding contact ST1; the normally-closed contact FR1 of described overcurrent protector FR; the normally-closed contact ST2 of time circulation relay ST; stop button SB1; after connecting successively, start button SB2 and main contactor KM coil be connected to the two-phase end of described power switch QS output by the second fuse FU2; the normally opened contact ST3 of the self-holding contact KM2 of described main contactor KM and time circulation relay ST is connected in parallel to the two ends of described start button SB2; the described circulation SB4 that releases the button; be connected to the two-phase end of described power switch QS output after cycle stop push button SB3 and time circulation relay ST connect successively, the self-holding contact ST1 of described time circulation relay ST is connected in parallel to the release the button two ends of SB4 of described circulation.
For improving the reliability of this control circuit, the normally opened contact ST3 of above-mentioned time circulation relay ST and normally-closed contact ST2 adopt the push button contact.
Operation principle and actual operation conditions according to magnetic separator, the high frequency operation of magnetic separator is unnecessary, because whether no matter the magnetic separator belt rotate, ferromagnetic materials in the sucking-off coal always all, rotating belt just plays removes the ferromagnetic material that attracts on the belt.The operating efficiency that equally can guarantee separating ferrum magnetisable material from coal running time of compression magnetic separator.Therefore the work of the gap of magnetic separator can guarantee magnetic separator upkeep operation, improve other component life.
In the control circuit of magnetic separator, start button and stop button still can be controlled the motor operation and stop in this power plant coal dust pulverized coal preparation system, thus the duty of controlling magnet separator; And when working in need controlling magnet separator gap, press the relay circuit that circulates turn-on time of releasing the button that circulates, the self-holding contact closure of time circulation this moment relay, the work of time circulation relay, the normally opened contact closure of the relay of time circulation simultaneously, the main contactor wire loop is connected, the main contactor three-phase closing of contact, motor gets electric operation, opens at time circulation relay work its normally-closed contact after set dwell time, the main contactor wire loop disconnects, and motor is out of service; And when the work of time circulation relay after set start-up time, the normally-closed contact closure of time circulation relay, motor moves once more; So this control circuit has been realized the gap operation of magnetic separator; And when magnetic separator does not need gap work, press cycle stop push button, the current supply circuit of the relay that circulates break time gets final product; The gap work of above-mentioned magnetic separator has improved the service life of each other parts of magnetic separator, has reduced the production and the cost of overhaul.
Claims (2)
1; the control circuit of magnetic separator in a kind of power plant coal dust pulverized coal preparation system; comprise power switch; motor; main contactor; overcurrent protector; start button; stop button; described power switch connects three phase mains; described motor connects three-phase contact one end of described main contactor by described overcurrent protector; the other end of main contactor three-phase contact connects the output of power switch by first fuse; it is characterized in that: also comprise time circulation relay; circulation is released the button and cycle stop push button; described time circulation relay has normally opened contact; normally-closed contact and self-holding contact; the normally-closed contact of described overcurrent protector; the normally-closed contact of time circulation relay; stop button; after connecting successively, start button and main contactor coil be connected to the two-phase end of described power switch output by second fuse; the normally opened contact of the self-holding contact of described main contactor and time circulation relay is connected in parallel to the two ends of described start button; described circulation is released the button; be connected to the two-phase end of described power switch output after cycle stop push button and time circulation relay are connected successively, the self-holding contact of described time circulation relay is connected in parallel to the two ends that described circulation is released the button.
2, the control circuit of magnetic separator in the power plant according to claim 1 coal dust pulverized coal preparation system, it is characterized in that: the normally opened contact of described time circulation relay and normally-closed contact are the push button contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200724120U CN201399376Y (en) | 2009-05-18 | 2009-05-18 | Control circuit of magnet separator in powder coal milling system in power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200724120U CN201399376Y (en) | 2009-05-18 | 2009-05-18 | Control circuit of magnet separator in powder coal milling system in power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201399376Y true CN201399376Y (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200724120U Expired - Fee Related CN201399376Y (en) | 2009-05-18 | 2009-05-18 | Control circuit of magnet separator in powder coal milling system in power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201399376Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394460A (en) * | 2011-07-12 | 2012-03-28 | 国电南京自动化股份有限公司 | Safe and quick connection method of high-voltage power source |
| CN107933325A (en) * | 2017-11-24 | 2018-04-20 | 共享装备股份有限公司 | Track electric car control system |
-
2009
- 2009-05-18 CN CN2009200724120U patent/CN201399376Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394460A (en) * | 2011-07-12 | 2012-03-28 | 国电南京自动化股份有限公司 | Safe and quick connection method of high-voltage power source |
| CN102394460B (en) * | 2011-07-12 | 2013-08-14 | 国电南京自动化股份有限公司 | Safe and quick connection method of high-voltage power source |
| CN107933325A (en) * | 2017-11-24 | 2018-04-20 | 共享装备股份有限公司 | Track electric car control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100210 Termination date: 20110518 |