CN103259466A - Driving device for downhole belt conveyor - Google Patents
Driving device for downhole belt conveyor Download PDFInfo
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- CN103259466A CN103259466A CN201310148318XA CN201310148318A CN103259466A CN 103259466 A CN103259466 A CN 103259466A CN 201310148318X A CN201310148318X A CN 201310148318XA CN 201310148318 A CN201310148318 A CN 201310148318A CN 103259466 A CN103259466 A CN 103259466A
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- belt feeder
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Abstract
The invention discloses a driving device for a downhole belt conveyor. The driving device for the downhole belt conveyor overcomes the defects that due to the fact that an existing downhole belt is driven by alternating current variable frequency driving, the number of devices is excessive, and connection is excessively tedious. The driving device for the downhole belt conveyor comprises a transformer, a pre-charge circuit, rectifying devices and at least two inverters, wherein the transformer provides three-phase alternating current with phase shift of twelve pulse modes, the rectifying devices are connected with the transformer, and carries out rectification on the three-phase alternating current provided by the transformer to obtain direct current, the pre-charge circuit is connected with the rectifying devices, carries out charge when a main circuit contactor is closed, and sends out trigger pulses to the rectifying devices after charge is finished, and the inverters are connected with the rectifying devices, and converts direct current provided by the rectifying devices into alternating current to drive a motor to work. According to the driving device for the downhole belt conveyor, integration is carried out on various relative devices, external link connection is greatly reduced, installation portions are correspondingly reduced, and reliability and convenience of a frequency converter in downhole usage are improved.
Description
Technical field
The present invention relates to driving arrangement, relate in particular to a kind of down-hole belt feeder driving arrangement.
Background technology
Belt feeder is one of modernized colliery high-yield and high-efficiency down-hole coal excavation working face capital equipment.The drive technology of mining down-hole belt is various informative, mainly contains various ways such as variable speed fluid coupling, controllable start transmitting device (CST) and AC variable frequency drive at present.
The design feature of ac variable frequency speed regulation is to change the speed governing of frequency actuating motor by frequency converter, driven by motor decelerator, the operation of decelerator drive belt roller.At present the down-hole uses the separate unit frequency converter to drive mostly, along with down-hole coal excavation apparatus driving power demand is increasing, uses and twoly drives, three the belts that drive such as drives with increasing more, and separate unit frequency conversion drive equipment can not satisfy the user and use needs.But be to use many drivings exist again equipment too much, connect too complicated, difficulty and the more high many difficult problems of cost be installed.In addition, it is big that many drivings also exist harmonic content, the essential inlet wire filter that uses, and this influence to electrical network is also very big.
Because the down-hole belt feeder is not permanent fixation equipment, along with need repeating dismounting, the propelling of digging uses, and above-mentioned shortcoming has greatly increased the user and has used difficulty.
Summary of the invention
Technical problem to be solved by this invention is to overcome existing mining down-hole belt to adopt AC frequency conversion to drive existing equipment too much and the too loaded down with trivial details deficiency of connection.
In order to solve the problems of the technologies described above, the application provides a kind of down-hole belt feeder driving arrangement, comprises transformer (1), pre-charge circuit (3), rectifying device (2), at least two inverters (4), wherein:
Transformer (1) provides the three-phase alternating current of 12 pulse mode phase shifts;
Rectifying device (2) links to each other with transformer (1), and the three-phase alternating current that transformer (1) is provided carries out rectification and obtains direct current;
Pre-charge circuit (3) links to each other with rectifying device (2), charges after major loop contactor closure, and sends trigger impulse for after charging finishes rectifying device (2);
Inverter (4) links to each other with rectifying device (2), and the direct current that rectifying device (2) is provided is converted to the alternating current drive motors and turns round.
Preferably, transformer (1) comprises two winding transformer, and this two winding transformer comprises a former limit and two secondary, adopts the star delta-connection, phase difference output 30 degree.
Preferably, rectifying device (2) comprises first rectification unit and second rectification unit that is connected in parallel.
Preferably, three inverters (4) are connected in parallel on rectifying device (2) afterwards, and adopting altogether with these two rectification units, the dc bus structure is connected.
Preferably, the every phase upper arm of each rectification unit is silicon controlled module, and underarm is rectification module.
Preferably, be connected in series with vacuum contactor and protection fast acting fuse between transformer (1) and the rectifying device (2).
Preferably, inverter (4) comprises inverter circuit, filter circuit and discharge circuit, wherein:
Inverter circuit adopts single tube three-phase fully-controlled bridge circuit, and protection enters inverter circuit to dc bus through fast acting fuse;
Filter circuit comprises two thin-film capacitors that are connected in parallel;
Discharge circuit comprises the discharge resistance that connects positive and negative busbar.
Preferably, this equipment comprises: the PLC controller, link to each other with transformer (1), rectifying device (2) and inverter (4) respectively, and gather the operating state of transformer (1), rectifying device (2) and inverter (4).
Compared with prior art, the application's embodiment carries out integrated integration with multiple relevant device, has greatly reduced outside link contact, and reliability and convenience that frequency converter uses in the down-hole have been improved in the corresponding mounting portion of having reduced.The application's example structure compactness, volume is little, use comprises the frequency conversion structure of rectifying device and inverter as the drive unit of belt feeder, it is good to play starting characteristic, good speed adjustment features, starting changes numerous advantages such as distance is big and energy-conservation, and whole equipment reliable operation, maintenance is little, is fit to very much the application scenario that down-hole belt feeder needs often repeat dismounting.
Description of drawings
Fig. 1 is the composition schematic diagram of the embodiment of the present application down-hole belt feeder driving arrangement.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter will be elaborated to embodiments of the invention by reference to the accompanying drawings.Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
Fig. 1 is the composition schematic diagram of the embodiment of the present application.As shown in Figure 1, the application's embodiment mainly comprises transformer 1, pre-charge circuit 3, rectifying device 2 and at least two inverters 4.
Transformer 1 provides the three-phase alternating current of 12 pulse mode phase shifts.
Rectifying device 2 links to each other with transformer 1, and the three-phase alternating current that transformer 1 is provided carries out rectification and obtains direct current.
Pre-charge circuit 3 links to each other with rectifying device 2, charges after major loop contactor closure, and sends trigger impulse for after charging finishes rectifying device 2.
Inverter 4 links to each other with rectifying device 2, and the direct current that rectifying device 2 is provided is converted to the alternating current drive motors and turns round, and wherein every motor is corresponding drives a belt feeder.
Consider that the current ratio in the switching process is bigger, the rectifying device 2 in the present embodiment comprises first rectification unit and second rectification unit that is connected in parallel.The form of two rectification unit parallel connections, wherein the electric current in each rectification unit is all less, has improved the fail safe of rectifying device 2 and whole equipment.
In order to access the phase shift of 12 pulse modes, reduce harmonic wave to electric network influencing, present embodiment adopts two winding transformer, and it comprises a former limit and two secondary, adopts the star delta-connection, phase difference output 30 degree.Another purpose of transformer 1 provides enough impedances side harmonics is limited in the desired limits of IEEE519.
In the present embodiment, being connected in parallel on after the rectifying device 2 is three inverters 4.Three inverters 4 adopt dc bus structure altogether with aforesaid two rectification units, can save components and parts, reduce equipment volume, reduce the equipment heating amount.Because the main caloric value of frequency converter just is created on the semiconductor element, inlet wire two winding transformer phase difference 30 degree can make rectified wave form 12 pulse wave direct currents through rectification, reduce harmonic wave to the influence of electrical network.
Among the application's the embodiment, can also be connected in series with vacuum contactor and protection fast acting fuse between transformer 1 and the rectifying device 2, further improve the security performance of entire equipment.Three-phase alternating current through transformer 1 obtains carries out rectification through entering rectifying device 2 again behind vacuum contactor, the protection fast acting fuse.
Among the application's the embodiment, pre-charge circuit 3 comprises diode, charging resistor and pre-charge circuit plate, wherein:
Diode VD1 makes the electric current folk prescription to working, and alternating current-direct current is carried out half isolation;
Charging resistor 1RO limits excessive charging current;
The pre-charge circuit plate, the control pre-charge process.
Rectification unit three-phase inlet wire is AC1140V, and two rectification units are connected in parallel.The every phase upper arm of single rectification unit is silicon controlled module (MT1000A/4500V), and underarm is rectification module (MD1000A/4500V).
After the major loop contactor closure, earlier by pre-charge circuit 3 chargings, precharge control circuit sent trigger impulse for rectification unit upper arm silicon controlled module after voltage on the first filter capacitor 1CO1 and the second filter capacitor 1CO2 reached set point, and electric current flows to two filter capacitors by silicon controlled module.After voltage reached preset value, rectifier bridge replaced the effect of precharge loop.
Inverter 4 in the embodiment of the present application comprises inverter circuit, filter circuit and discharge circuit.Inverter circuit adopts single tube three-phase fully-controlled bridge circuit, and protection enters inverter circuit to dc bus through fast acting fuse FU11.Filter circuit comprises two thin-film capacitors that are connected in parallel.Discharge circuit comprises discharge resistance, connects positive and negative busbar.Discharge circuit is 1 discharge resistance 1R1, is characterized in simple in structure, need not add charge power supply and improve equipment dependability.Inverter circuit uses insulated gate bipolar transistor (IGBT) to form inverter 4, drives the motor operation.
The application's embodiment comprises the PLC controller, links to each other with transformer 1, rectifying device 2, inverter 4 and drive motors respectively, gathers the operating state of transformer 1, rectifying device 2, inverter 4 and drive motors, and feeds back to ground monitoring system.The PLC controller is responsible for controlling the dynamic control of starting operation and the power-balance of frequency converter; and gather data such as the related data of frequency converter, motor and transformer such as electric current and voltage, temperature, rotating speed by transducer, set kinds of protect functions such as overload, overvoltage, under voltage, phase shortage, overheated, earth leakage search/lockout accordingly.The application's embodiment also by data/address bus with the data upload ground monitoring system that the PLC control system collects, be convenient to the ground management and control.
The application's embodiment has superior soft start, soft stop is ended characteristic.The starting of flame proof frequency converter, dwell time are adjustable (0-10 minute (min)) arbitrarily, and the acceleration when also namely starting and the deceleration when stopping are adjustable arbitrarily.For smooth start, also can mate the S type acceleration and deceleration time that it possesses simultaneously, the impact that belt feeder can be played the stopping time generation like this is reduced to minimum, and this is that existing driving arrangement is unapproachable.
The application's embodiment has the band of testing function.The production and transport system in colliery is many based on belt feeder, the groundwork of transportation system's repair and maintenance is the repair and maintenance of belt feeder, low speed is tested the major requirement that the band function is the belt feeder maintenance, the frequency conversion Adjustment System is the alternating-current actuating system of stepless time adjustment, under carrier state was tested in zero load, frequency converter can be adjusted any belt speed of machine operation in the specified belt speed scope of 5%-100%.
The application's embodiment has heavy-load start function stably.Belt feeder all may stop immediately arbitrarily in fortune coal process and reset a moment, must consider " heavy-load start " ability.Therefore the exportable 1.5-2 times nominal torque because the employing of the frequency converter in present embodiment Speedless sensor vector control mode, low frequency turn round is very suitable for " heavy-load start ".
The application's embodiment has power balance function.The belt feeder system mostly is twin-roll driving or multiple-roll driving under the coal mine; in order to guarantee intrasystem net synchronization capability; at first; requirement is positioned at each cylinder start and stop synchronously of head; when a certain electrical fault, can make system-down; in order to guarantee the transport capacity of system, should guarantee the power-balance between each cylinder simultaneously as far as possible.The application's embodiment is by the given speed difference of adjusting between two motors of the speed of adjusting corresponding two frequency converters, increase or reduce the size of the electric current difference of two drive motors in can zone of reasonableness arbitrarily, therefore can control the current value of each motor by independent control system, by the speed of adjusting each motor each motor current value is progressively tended to balance, this has just formed a dynamic power-balance system.
The application's embodiment can automatic speed regulation, and the electricity saving and energy saving effect is obvious.Special producing condition corresponding to the colliery, sometimes the output of coal is extremely inhomogeneous, certainly the fortune coal amount of belt feeder system also is inhomogeneous, when load is light or non-loaded, the high-speed cruising of belt feeder system is comparatively serious to the wearing and tearing waste of machine driven system, simultaneously power consumption is also than big many of low cruise, but because of the belt feeder system that needs that produces again can not This vehicle stops frequently.The application's embodiment adopts independent control system that the load of prime transportation system, the load of this machine transportation system are measured respectively, can control the frequency converter reduction of speed like this or shift to an earlier date raising speed.For the belt feeder system of load inequality, saves energy greatly.
The application's embodiment has the function that reduces conveyor belt tension.Because the good starting characteristic that adopts the flame proof frequency converter to produce can reduce dynamic tension 30% at least, can reduce a label during as design alternative belt strength in the early stage.In actual application, owing to reduced starting-impact, the equipment loss of belt feeder mechanical system also can decrease, and especially the life-span of carrying roller and cylinder becomes several times prolongation.
The application's embodiment has improved the reliability of belt feeder greatly, has reduced the mechanical system loss, has reduced the maintenance of transportation system, and energy-conservation obvious.With its distinctive soft-start feature, high cost performance will become the developing direction that the down-hole belt feeder drags.
Though the disclosed execution mode of the application as above, the execution mode that described content just adopts for the ease of understanding the application is not in order to limit the present invention.Technical staff under any the application in the technical field; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can do any modification and variation in the details of implementing that reaches in form; but the application's scope of patent protection still must be as the criterion with the scope that appending claims was defined.
Claims (8)
1. a down-hole belt feeder driving arrangement is characterized in that, comprises transformer (1), pre-charge circuit (3), rectifying device (2), at least two inverters (4), wherein:
Transformer (1) provides the three-phase alternating current of 12 pulse mode phase shifts;
Rectifying device (2) links to each other with transformer (1), and the three-phase alternating current that transformer (1) is provided carries out rectification and obtains direct current;
Pre-charge circuit (3) links to each other with rectifying device (2), charges after major loop contactor closure, and sends trigger impulse for after charging finishes rectifying device (2);
Inverter (4) links to each other with rectifying device (2), and the direct current that rectifying device (2) is provided is converted to the alternating current drive motors and turns round.
2. down-hole according to claim 1 belt feeder driving arrangement is characterized in that,
Transformer (1) comprises two winding transformer, and this two winding transformer comprises a former limit and two secondary, adopts the star delta-connection, phase difference output 30 degree.
3. down-hole according to claim 1 belt feeder driving arrangement is characterized in that,
Rectifying device (2) comprises first rectification unit and second rectification unit that is connected in parallel.
4. down-hole according to claim 3 belt feeder driving arrangement is characterized in that,
Three inverters (4) are connected in parallel on rectifying device (2) afterwards, and adopting altogether with these two rectification units, the dc bus structure is connected.
5. down-hole according to claim 3 belt feeder driving arrangement is characterized in that,
The every phase upper arm of each rectification unit is silicon controlled module, and underarm is rectification module.
6. down-hole according to claim 1 belt feeder driving arrangement is characterized in that,
Be connected in series with vacuum contactor and protection fast acting fuse between transformer (1) and the rectifying device (2).
7. down-hole according to claim 1 belt feeder driving arrangement is characterized in that inverter (4) comprises inverter circuit, filter circuit and discharge circuit, wherein:
Inverter circuit adopts single tube three-phase fully-controlled bridge circuit, and protection enters inverter circuit to dc bus through fast acting fuse;
Filter circuit comprises two thin-film capacitors that are connected in parallel;
Discharge circuit comprises the discharge resistance that connects positive and negative busbar.
8. down-hole according to claim 1 belt feeder driving arrangement is characterized in that this equipment comprises:
The PLC controller links to each other with transformer (1), rectifying device (2) and inverter (4) respectively, gathers the operating state of transformer (1), rectifying device (2) and inverter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148318XA CN103259466A (en) | 2013-04-25 | 2013-04-25 | Driving device for downhole belt conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148318XA CN103259466A (en) | 2013-04-25 | 2013-04-25 | Driving device for downhole belt conveyor |
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| CN103259466A true CN103259466A (en) | 2013-08-21 |
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| CN201310148318XA Pending CN103259466A (en) | 2013-04-25 | 2013-04-25 | Driving device for downhole belt conveyor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745940A (en) * | 2017-10-11 | 2018-03-02 | 贵州开磷集团股份有限公司 | A kind of conveyer belt control system and its control method |
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| CN2886911Y (en) * | 2006-04-04 | 2007-04-04 | 上海雷诺尔电气有限公司 | Variable-frequency speed regulator with harmonic suppression |
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| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
| CN202475344U (en) * | 2012-03-08 | 2012-10-03 | 上海振华重工(集团)股份有限公司 | Electric control system of floating crane |
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2013
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Patent Citations (6)
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| CN2886911Y (en) * | 2006-04-04 | 2007-04-04 | 上海雷诺尔电气有限公司 | Variable-frequency speed regulator with harmonic suppression |
| CN2938567Y (en) * | 2006-08-15 | 2007-08-22 | 唐山开诚电器有限责任公司 | Explosive-proof compatible safe four-quadrant frequency converter speed regulation system of digital mine hoist |
| CN101728999A (en) * | 2008-10-10 | 2010-06-09 | 鸿富锦精密工业（深圳）有限公司 | Motor driving device |
| CN201947218U (en) * | 2011-03-26 | 2011-08-24 | 温州职业技术学院 | Single-phase induction motor speed regulation control system |
| CN102355195A (en) * | 2011-10-24 | 2012-02-15 | 乔鸣忠 | Multi-inverter module paralleling frequency conversion device for transmission system and control policy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107745940A (en) * | 2017-10-11 | 2018-03-02 | 贵州开磷集团股份有限公司 | A kind of conveyer belt control system and its control method |
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Application publication date: 20130821 |