CN201985698U - Motor double protection device for grating scrubbing machine - Google Patents
Motor double protection device for grating scrubbing machine Download PDFInfo
- Publication number
- CN201985698U CN201985698U CN2011200620294U CN201120062029U CN201985698U CN 201985698 U CN201985698 U CN 201985698U CN 2011200620294 U CN2011200620294 U CN 2011200620294U CN 201120062029 U CN201120062029 U CN 201120062029U CN 201985698 U CN201985698 U CN 201985698U
- Authority
- CN
- China
- Prior art keywords
- motor
- force overload
- power output
- torque force
- comparator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
- Control Of Electric Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The present utility model provides a motor double protection device for a grating scrubbing machine. The device comprises a mechanical protection device and a motor protection circuit. The mechanical protection device comprises a motor, a gearbox, an anti-torsional force overload insurance pedestal and a power output gear disc. The gearbox is provided with a power output shaft, the anti-torsional force overload insurance pedestal is sleeved on the power output shaft, the power output gear disc is connected with the anti-torsional force overload insurance pedestal through an anti-torsional force overload safety bolt, the circumference of the anti-torsional force overload safety bolt is provided with a groove, and the central cross-section of the groove is superposed with a joint surface of the power output gear disc and the anti-torsional force overload insurance pedestal. The motor protection circuit comprises a current acquisition unit, a hysterisis comparator, a low voltage power supply, a motor operation starter, a triode, a delayer and a relay. The present technology scheme adopts a double protection measure combining the motor protection circuit with the mechanical protection device, thereby guarantying the absolute safety of the motor.
Description
Technical field
The utility model relates to grid sewage-removing machine, especially relates to the motor double protecting device of grid sewage-removing machine.Belong to the urban sewage treatment technology field.
Background technology
Along with the increase and the quickening of urbanization process of economy and fast development of society, population, the sewage quantity that city " production " goes out grows with each passing day, problem closely bound up with the lives of the people, that demand urgently paying attention to that sewage disposal has become.
Municipal sewage treatment relates to many art, in the early stage that municipal sewage is handled, will tackle, remove sewage rubbish such as various solid particulate matters, floating thing, plastic products earlier.Block the key equipment of dirt, slagging-off in the processing procedure as sewage rubbish, grid sewage-removing machine is by grid tooth, grid tooth axle, carrier bar.Composition such as motor, gearbox.Aperture plate is done gyration in frame, thereby the water surface is also constantly isolated in the interception of the suspension rubbish thing in the sewage, and the grid slag drops down onto in the slag bucket by changeing the brush brush.Grid tooth in the aperture plate is with engineering plastics or two kinds of made of stainless steel, and grid tooth axle and carrier bar etc. are by the stainless steel manufacturing.
Because what rubbish has in the municipal sewage system, in interception, filter process, rubbish can be concentrated to be blocked in the grid maker, thereby cause the grid maker drive motors to drive overload " suffocating ", so often will burn out miscellaneous part such as motor.Prior art adopts thermal relay to make electric motor protecting, but owing to the bimetal leaf of thermal relay occurs being difficult to recover originally behind thermal fatigue, the overheated several easily.Often occur being failure to actuate because of the overload that thermal fatigue causes.So the fault that causes of motor-driven overload still for a long time.
The utility model content
Technical problem to be solved in the utility model provides a kind of motor double protecting device of grid sewage-removing machine, by mechanical protection and circuit protection duplicate protection, the motor of grid sewage-removing machine and other equipment can not burnt out because of the motor-driven overload.
The technical scheme that the utility model solves the problems of the technologies described above is:
A kind of motor double protecting device of grid sewage-removing machine, comprise Machine guarding and motor protective circuit, described Machine guarding comprises motor, gearbox, anti-torque force overload insurance base and power output gear dish, described gearbox is provided with a power output shaft, described anti-torque force overload insurance base sheath is located on the power output shaft, described power output gear dish is connected with anti-torque force overload insurance base by anti-torque force overload safety bolt, along the groove that is circumferentially with of anti-torque force overload safety bolt, the faying face between the central cross-section of described groove and power output gear dish and the anti-torque force overload insurance base coincides;
Described motor protective circuit comprises current acquisition unit, hysteresis comparator, low-tension supply, motor operation starter, triode BG, delayer YS and relay J D.
Further, described current acquisition unit comprises 3 phase current mutual inductor LA, LB, LC, 3 diode D1, the D2, the D3 that carry out rectification, 3 capacitor C 1 of carrying out the filtering energy storage, C2, C3,3 isolating diode D4, D5, D6, current-limiting resistance R1 and the capacitor C 4 of carrying out the current tracking sampling;
Described hysteresis comparator is made up of potentiometer WR and comparator IC2, resistance R 2, resistance R 3 and feedback resistance R4, described comparator IC2 is the LM393 comparator, wherein, R2, R3 form bleeder circuit, 2 pin of its dividing point and comparator IC2 are connected, and 3 pin of comparator IC2, feedback resistance R4 are connected with the swing arm contact of potentiometer WR respectively;
Described low-tension supply is combined by transformer LT, rectifier bridge DQ and three terminal regulator IC1;
Described motor operation starter comprises three-phase ac contactor JC and start button AN;
1 pin output current limiting resistance R 5 of the base stage B of described triode BG and LM393 comparator is connected, its grounded emitter, one of the feeder ear of its collector electrode C and delayer YS connects end and links to each other, another of described delayer feeder ear connects end and links to each other with the 1 pin power input of three terminal regulator IC1, and described relay is connected between delayer and the low-tension supply.
Further again, be provided with alignment pin between described anti-torque force overload insurance base and the power output shaft.
As preferably, the quantity of described anti-torque force overload safety bolt is 2 or 3, is evenly distributed on the anti-torque force overload insurance base.
Compared with prior art, the technical program beneficial effect is:
1, the duplicate protection measure of having adopted motor protective circuit and Machine guarding to combine makes electric motor protecting perfectly safe.
2, motor protective circuit adopts 3 phase current mutual inductors, the operating current of tracking motor; Because when motor overload, its operating current is certain to exceed routine, and the present invention limits to exceed the threshold values scope of setting, just disconnects motor power immediately in case exceed the setting current threshold, thus protection motor and other equipment.
3, special antioverloading torque bolt; overcome extreme overload with mechanical structure; with it as last one limit protection; work as chance failure, when circuit protection of the present invention was malfunctioning, Machine guarding will play the follow-up protective effect of second cover; when grid maker since rubbish stop up; make when motor overload seriously oversteps the extreme limit that anti-torque force overload safety bolt is because groove binding makes it become the moment of torsion central point.When torsion surpassed metal strength: the groove place of anti-torque force overload safety bolt just began fracture, thereby made the power output gear dish separate with anti-torque force overload insurance base; This moment, motor and gearbox presented idle running, and motor has obtained protection.
Description of drawings
In conjunction with the accompanying drawings the utility model is described in further detail again below:
Fig. 1 is the structural representation of Machine guarding in the utility model.
Fig. 2 is the structural representation of anti-torque force overload safety bolt among Fig. 1.
Fig. 3 is the schematic diagram of motor protective circuit of the present utility model.
Fig. 4 is the control flow chart of electric motor protecting in the utility model.
Among the figure: 1, anti-torque force overload safety bolt, 11, the body of bolt, 12, groove, 13, bolt thread, 2, power output gear dish, 3, the nut of torque force overload safety bolt, 4, anti-torque force overload insurance base, 5, gearbox, 6, motor, 7, connection box for motor, 8, power output shaft, 9, alignment pin.
Embodiment
A kind of motor double protecting device of grid sewage-removing machine; comprise Machine guarding and motor protective circuit; as depicted in figs. 1 and 2; described Machine guarding comprises motor 6, gearbox 5, anti-torque force overload insurance base 4 and power output gear dish 2; described gearbox 5 is provided with a power output shaft 8; described anti-torque force overload insurance base 4 is set on the power output shaft 8, is provided with an alignment pin 9 between described anti-torque force overload insurance base 4 and the power output shaft 8.Described power output gear dish 2 is connected with anti-torque force overload insurance base 4 by anti-torque force overload safety bolt 1, the groove 10 that is circumferentially with along anti-torque force overload safety bolt 1, faying face AB between the central cross-section of described groove 10 and power output gear dish and the anti-torque force overload insurance base coincides, the quantity of anti-torque force overload safety bolt is preferably 2 or 3, and they are evenly distributed on the anti-torque force overload insurance base.
Behind motor process power output shaft 8 outputting powers of gearbox, alignment pin 9 and anti-torque force overload insurance base and the also rotation thereupon of power output gear dish with its close-fitting, when grid maker since rubbish stop up, make when motor overload seriously oversteps the extreme limit, anti-torque force overload safety bolt is because groove 12 effects among Fig. 2 make it become the moment of torsion central point.When torsion surpassed metal strength: the groove place of anti-torque force overload safety bolt just began fracture, thereby made the power output gear dish separate with anti-torque force overload insurance base; This moment, motor and gearbox presented idle running, and motor has obtained protection.
As shown in Figure 3, motor protective circuit comprises current acquisition unit, hysteresis comparator, low-tension supply, motor operation starter, triode BG, delayer YS and relay J D.
Described current acquisition unit comprises 3 phase current mutual inductor LA, LB, the LC that carries out the current tracking sampling, carries out 3 diode D1, D2, the D3 of rectification, 3 capacitor C 1 of carrying out the filtering energy storage, C2, C3,3 isolating diode D4, D5, D6, current-limiting resistance R1 and capacitor C 4.Dynamic current after the sampling carries out " concentrating " through 3 isolating diode D4, D5, D6 after through 3 diode D1, D2, D3 rectification and 3 capacitor C 1, C2, C3 filtering energy storage, through current-limiting resistance R1, capacitor C 4 buffering accumulated energies (anti-interference effect).
Described hysteresis comparator is made up of potentiometer WR and comparator IC2, resistance R 2, resistance R 3 and feedback resistance R4, described comparator IC2 is the LM393 comparator, wherein, R2, R3 form bleeder circuit, 2 pin of its dividing point and comparator IC2 are connected, 3 pin of comparator IC2, feedback resistance R4 are connected with the swing arm contact of potentiometer WR respectively, can adjust the threshold values that limits overload by adjusting the swing arm contact.
Described low-tension supply is combined by transformer LT, rectifier bridge DQ and three terminal regulator IC1.The working power of hysteresis comparator is supplied with in 3 pin of three terminal regulator IC1+5V power supply output, and R5 is the 1 pin output current limiting resistance of comparator IC2, and links to each other with the base stage b of triode BG; The emitter E of BG links to each other with GND; The collector electrode C of BG links to each other with delayer YS feeder ear, and visible triode has played the effect of an electronic switch.Another of YS delayer feeder ear connects end, directly links to each other with the 1 pin power input of IC1.
1 pin output current limiting resistance R 5 of the base stage B of described triode BG and LM393 comparator is connected, its grounded emitter, one of the feeder ear of its collector electrode C and delayer YS connects end and links to each other, another of described delayer YS feeder ear connects end and links to each other with the 1 pin power input of three terminal regulator IC1, and described relay J D is connected between delayer and the low-tension supply.
Described motor operation starter comprises three-phase ac contactor JC and start button AN; JCK is three groups of contacts of JC three-phase ac contactor; JCK1 is the synchronous normally closed auxiliary contact of JC three-phase ac contactor, JCK2 be the JC three-phase ac contactor often drive auxiliary contact synchronously.AN is a start button; Operation principle is to press AN: electric current is from C phase → AN → JK1 → JC → A phase; When JC gets electricly, JCK1 disconnected when JCK was all closed; The JCK2 closure is finished the self-insurance locking, and entire circuit is started working.
When the present invention surpasses setting because of the grid maker motor overload, delayer YS action makes when YSK delayer normally opened contact is closed, relay J D and low-voltage supply constitute the loop, the normally-closed contact JDK of JD is separated simultaneously, self-insurance locking loses and makes JCK also separate, and makes A.C. contactor JC dead electricity → JCK disconnection → cut-out three phase mains synchronously; The grid maker drive motors has obtained protection thus.
Above-mentioned embodiment is not to be qualification to technical solutions of the utility model; such as; in the utility model; also can be chain device by anti-torque force overload safety bolt with the member that anti-torque force overload insurance base is connected; as long as used the inventive concept of this patent, all fall within the protection range of the present utility model.
Claims (4)
1. the motor double protecting device of a grid sewage-removing machine comprises Machine guarding and motor protective circuit, it is characterized in that:
Described Machine guarding comprises motor, gearbox, anti-torque force overload insurance base and power output gear dish, described gearbox is provided with a power output shaft, described anti-torque force overload insurance base sheath is located on the power output shaft, described power output gear dish is connected with anti-torque force overload insurance base by anti-torque force overload safety bolt, along the groove that is circumferentially with of anti-torque force overload safety bolt, the faying face between the central cross-section of described groove and power output gear dish and the anti-torque force overload insurance base coincides;
Described motor protective circuit comprises current acquisition unit, hysteresis comparator, low-tension supply, motor operation starter, triode (BG), delayer (YS) and relay (JD).
2. motor double protecting device according to claim 1 is characterized in that:
Described current acquisition unit comprises 3 phase current mutual inductors (LA, LB, LC), 3 diodes (D1, D2, D3) that carry out rectification, 3 electric capacity (C1, C2, C3) that carry out the filtering energy storage, 3 isolating diodes (D4, D5, D6), current-limiting resistance R1 and the capacitor C 4 of carrying out the current tracking sampling;
Described hysteresis comparator is made up of potentiometer (WR) and comparator (IC2), resistance R 2, resistance R 3 and feedback resistance R4, described comparator (IC2) is the LM393 comparator, wherein, R2, R3 form bleeder circuit, its dividing point is connected with 2 pin of comparator (IC2), and 3 pin of comparator (IC2), feedback resistance R4 are connected with the swing arm contact of potentiometer WR respectively;
Described low-tension supply is combined by transformer (LT), rectifier bridge (DQ) and three terminal regulator (IC1);
Described motor operation starter comprises three-phase ac contactor (JC) and start button (AN);
1 pin output current limiting resistance R 5 of the base stage B of described triode (BG) and LM393 comparator is connected, its grounded emitter, one of the feeder ear of its collector electrode C and delayer (YS) connects end and links to each other, another of described delayer (YS) feeder ear connects end and links to each other with 1 pin power input of three terminal regulator (IC1), and described relay (JD) is connected between delayer and the low-tension supply.
3. motor double protecting device according to claim 1 is characterized in that:
Be provided with alignment pin between described anti-torque force overload insurance base and the power output shaft.
4. motor double protecting device according to claim 1 is characterized in that:
The quantity of described anti-torque force overload safety bolt is 2 or 3, is evenly distributed on the anti-torque force overload insurance base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200620294U CN201985698U (en) | 2011-03-10 | 2011-03-10 | Motor double protection device for grating scrubbing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200620294U CN201985698U (en) | 2011-03-10 | 2011-03-10 | Motor double protection device for grating scrubbing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985698U true CN201985698U (en) | 2011-09-21 |
Family
ID=44613148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200620294U Expired - Fee Related CN201985698U (en) | 2011-03-10 | 2011-03-10 | Motor double protection device for grating scrubbing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985698U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532311A (en) * | 2013-10-25 | 2014-01-22 | 中电电机股份有限公司 | Speed measurement device provided with overspeed protection |
| CN105305727A (en) * | 2015-10-14 | 2016-02-03 | 北京曙光航空电气有限责任公司 | Protection structure of high-speed alternating-current generator rotation half-wave rectifier bridge |
-
2011
- 2011-03-10 CN CN2011200620294U patent/CN201985698U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532311A (en) * | 2013-10-25 | 2014-01-22 | 中电电机股份有限公司 | Speed measurement device provided with overspeed protection |
| CN103532311B (en) * | 2013-10-25 | 2015-09-30 | 中电电机股份有限公司 | With the speed measuring device of overspeed protection |
| CN105305727A (en) * | 2015-10-14 | 2016-02-03 | 北京曙光航空电气有限责任公司 | Protection structure of high-speed alternating-current generator rotation half-wave rectifier bridge |
| CN105305727B (en) * | 2015-10-14 | 2017-08-08 | 北京曙光航空电气有限责任公司 | The protection structure of high speed alternator rotatable half-wave rectifier bridge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201985698U (en) | Motor double protection device for grating scrubbing machine | |
| CN101997459A (en) | DC oil pump motor soft start control device | |
| CN206180586U (en) | Isolated island operation system based on cement plant cogeneration | |
| CN201976067U (en) | Variable frequency control device of fan | |
| CN201393193Y (en) | Brake control circuit | |
| CN203705851U (en) | Control circuit | |
| CN201140998Y (en) | High water level early-warning device of oxidation ditch | |
| CN204794028U (en) | Intellectuality ac motor protector that is just reversing | |
| CN201174682Y (en) | Intelligent motor controller | |
| CN102465759A (en) | Automatic diesel generator set | |
| CN202045667U (en) | Slicer circuit capable of realizing spindle scram | |
| CN203787942U (en) | Motor protective device | |
| CN201972907U (en) | Variable frequency control device of water pump | |
| CN201742135U (en) | Power supply intelligent management device | |
| CN106374678A (en) | Coaxial multi-power electric motor system | |
| CN201976066U (en) | Frequency conversion control device of air compressor | |
| CN202678938U (en) | Motor overload protection circuit for motor-driven oil well pump | |
| CN206099650U (en) | Coaxial many power motor system | |
| CN207896735U (en) | The automatic start-stop power transmission of double-generator and reverse power supply protect circuit | |
| CN200939630Y (en) | Slicer circuit able to realizer sudden stop of mainshaft | |
| CN202663182U (en) | Power supply control system | |
| CN205595884U (en) | Intelligence voltage auto -change over device | |
| CN208218533U (en) | Solar power supply type water purifier | |
| CN201937519U (en) | Soft start control device of direct-current oil pump motor | |
| CN207368915U (en) | A kind of motor controller and its electric tool for being used to strengthen moment of torsion |
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: 20110921 Termination date: 20140310 |