CN103950703A - Submerged chain conveyor chain breakage protection and monitoring device and submerged chain conveyor chain breakage protection and monitoring system - Google Patents
Submerged chain conveyor chain breakage protection and monitoring device and submerged chain conveyor chain breakage protection and monitoring system Download PDFInfo
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- CN103950703A CN103950703A CN201410144486.6A CN201410144486A CN103950703A CN 103950703 A CN103950703 A CN 103950703A CN 201410144486 A CN201410144486 A CN 201410144486A CN 103950703 A CN103950703 A CN 103950703A
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- approach switch
- chain rupture
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Abstract
The invention relates to a submerged chain conveyor chain breakage protection and monitoring device and a submerged chain conveyor chain breakage protection and monitoring system. Two proximity switches on one side of a gear are utilized to carry out signal monitoring, and a single submerged chain conveyor, four groups of signals in total, carries out chain monitoring operation to effectively judge whether the signals are normal or are sent by mistake; meanwhile, overhaul maintenance work is greatly facilitated by the top screw fixing mode of the proximity switches.
Description
Technical field
The present invention relates to thermal powerplant apparatus field, especially a kind of dragveyer chain rupture monitoring for protection device and monitoring system.
Background technology
The dragveyer chain rupture monitoring for protection device that power plant is used is at present that the position relative with toothed disc in the both sides of guide wheel arranges respectively an approach switch.The principle of work of approach switch is that induced inside loop produces an electric signal when having its induction front end of object proximity.Electric signal is passed to dcs (Distributed Control System, i.e. DCS), and DCS system is sent signal control dragveyer drive motor and whether is tripped.Therefore after dragveyer chain-driving toothed disc rotates, approach switch can be made induction to tooth pitch respectively in equal time section, transmission electric signal judges, when approach switch does not detect gear turn signal, be judged as chain chain rupture and cause gear stall, thereby DCS sends signal, make the tripping operation of dragveyer electrical motor.
In safety, reliability and maintenance, there is many defects and inconvenience in said apparatus:
1, monitor signal is each approach switch of guide wheel bilateral, if one-sided approach switch generation abnormal failure can cause dragveyer chain rupture signal mistake to be sent out, thereby cause the tripping operation of dragveyer electrical motor, affects the normal stability and safety operation of unit;
2, conventionally approach switch is by front and back cap nut, probe segment to be fixed in the middle of iron plate base, and field activity ambient dust is more, and steam is heavier, probe front threads is easily by dust accretions, easy to clean not, while changing approach switch, nut cannot screw out smoothly, damages a silk tooth;
3, the fixed form of above-mentioned approach switch causes work place narrower and small, is not easy to the use of the instruments such as spanner, causes approach switch to be extremely difficult for maintenance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of dragveyer chain rupture monitoring for protection device and monitoring system, can prevent the unstable signal mistake that causes of sidetone signal, and the equipment that affects normally moves, and conveniently carries out replacing and the maintenance of approach switch simultaneously.
For solving the problems of the technologies described above; the invention provides a kind of dragveyer chain rupture monitoring for protection device; described monitoring device comprises firm banking; described firm banking is provided with at least two holes on bases in same level; described each holes on base arranges an approach switch; described approach switch is bolted on described firm banking by jackscrew, and described approach switch is electrically connected to dcs.
Preferably, described firm banking is platy structure.Described approach switch, through tabular firm banking, is fixed by jackscrew bolt.
The present invention provides a kind of dragveyer chain rupture monitoring for protection system of applying above-mentioned dragveyer chain rupture monitoring for protection device simultaneously, the guide wheel that comprises described monitoring device, is oppositely arranged with described monitoring device, the toothed disc that is arranged at described guide wheel both sides, the chain meshing with described toothed disc sawtooth and the oil pump drive motor that drives described chain to rotate.
As a preferred embodiment of the present invention, the relative position of the toothed disc of described guide wheel both sides arranges respectively firm banking, and two approach switchs in same level are set on described firm banking, and described approach switch arranges inductor near a side of toothed disc.
Described oil pump drive motor chain drive-belt rotates, thereby driven gear coiling guide wheel rotates, thereby approach switch senses that toothed disc sawtooth is near producing electric signal, send to dcs DCS to judge whether normal operation of gear electric signal.
As a preferred embodiment of the present invention, the vertical distance between described two approach switchs and gear is 2-5mm.Because the induction of hypertelorism approach switch, less than the variation of gear rack saw, can be worn and torn approach switch if skew occurs hypotelorism toothed disc.
As a preferred embodiment of the present invention, described monitoring system also comprises wiring terminal box, described approach switch accesses the top interface of described wiring terminal box by cable, the below interface of described wiring terminal box accesses the control housing of dcs DCS by cable.
The logic of the dragveyer chain rupture in DCS is judged as: four approach switchs connect by " non-" branch respectively, makes switching value " 0 " and judges with the exchange of " 1 ", and by switching value, convert back and forth, judgement chain is ceaselessly rotating.Four groups of logics are drawn by "or" and are judged, there is any one approach switch switching value signal misalignment all can send " 1 ", think that chain does not turn round, pass through with the run signal of dragveyer electrical motor again " with " judgement, if dragveyer motor is stopped transport, " 1 " of sending is considered as normal phenomenon, as what send is motor operation signal, makes alarm decision and shows.As normal in one of homonymy signal, a fault, judgement may be made human intervention early due to on-the-spot contamination by dust probe or electric loop fault, and better finishing equipment inspection is resumed work.Simultaneously one-sided two approach switchs by " with " judgement chain operation signal, again with two approach switchs of opposite side " with " the chain operation signal phase "or" judged, having one group of signal mal all can send respective switch amount judges, " with " dragveyer electrical motor run signal compares, electrical motor is stopped transport, and signal is normal, and electrical motor operation, is judged as chain rupture, send " 1 ", the tripping operation of dragveyer electrical motor.
Beneficial effect of the present invention is: improved type heat power plant boiler dragveyer chain rupture monitoring for protection device and monitoring system have improved accuracy and the stability of detection signal, totally 4 groups of signals of separate unit dragveyer completes chain monitoring, to signal is normal, sends out and makes effective judgement with mistake; The jackscrew fixed mode of approach switch greatly facilitates repair and maintenance work simultaneously, reduce the situation of dust accretions captive nut card silk, dismounting and change is easy, flexible for installation, save cleaning dust, spray the step of stain remover, avoided the awkward difficult problem that cannot use because of instruments such as narrow space spanners, only need unscrew from top bolt of rear end plate is detachable approach switch, repair quality and efficiency have been improved, meet the demand of carrying out production strictly in line with rules and regulations, ensured unit safety smooth operation, realized the doulbe-sides' victory that ensures that operation and maintenance is safeguarded.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention monitoring system;
Fig. 2 is the structural representation of embodiment of the present invention monitoring device.
Description of reference numerals:
The silk tooth of 1-firm banking, 2-holes on base, 3-jackscrew bolt, 4-approach switch, 5-simulation gear, 6-approach switch, 7-approach switch inductor.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Analog monitoring system architecture as shown in Figure 1, comprises dragveyer chain rupture monitoring for protection device (shown in dotted line frame) and simulation gear signal 5.
As shown in Figure 1, 2, firm banking 1 is provided with two holes on bases 2, and described two holes on bases 2 are in same level, in the same size.One approach switch 4 is set in each holes on base 2, and described approach switch 4 is fixed by jackscrew bolt 3.Approach switch 4 stretches out the two ends of firm banking 1, and two end faces that jackscrew bolt 3 is adjacent to firm banking 1 are fixed.This monitoring device also comprises that dcs DCS(is not shown), approach switch 4 is electrically connected to DCS system.
The present invention provides a kind of dragveyer chain rupture monitoring for protection system of applying above-mentioned dragveyer chain rupture monitoring for protection device simultaneously, the guide wheel that comprises described monitoring device, is oppositely arranged with described monitoring device, the toothed disc that is arranged at described guide wheel both sides, the chain meshing with described toothed disc sawtooth and the oil pump drive motor that drives described chain to rotate.The simulation gear signal 5 of the toothed disc of guide wheel both sides as shown in Figure 1.
As a kind of preferred version, described monitoring system also comprises wiring terminal box, and described approach switch 4 accesses the top interface of described wiring terminal box by cable, and the below interface of described wiring terminal box accesses the control housing of dcs DCS by cable.
Approach switch 4 is preferably 2-5mm with the vertical distance of toothed disc, because the induction of hypertelorism approach switch, less than the variation of gear rack saw, can be worn and torn approach switch if skew occurs hypotelorism toothed disc.In the present embodiment, preferably the vertical distance of the two is 3mm.
Described oil pump drive motor chain drive-belt rotates, thereby driven gear coiling guide wheel rotates, approach switch 4 arranges inductor 7 near a side of toothed disc, thereby inductor 7 senses that toothed disc sawtooth is near producing electric signal, send to dcs DCS to judge whether normal operation of gear electric signal.
The logic of the dragveyer chain rupture in DCS is judged as: four approach switchs connect by " non-" branch respectively, makes switching value " 0 " and judges with the exchange of " 1 ", and by switching value, convert back and forth, judgement chain is ceaselessly rotating.Four groups of logics are drawn by "or" and are judged, there is any one approach switch switching value signal misalignment all can send " 1 ", think that chain does not turn round, pass through with the run signal of dragveyer electrical motor again " with " judgement, if dragveyer motor is stopped transport, " 1 " of sending is considered as normal phenomenon, as what send is motor operation signal, makes alarm decision and shows.As normal in one of homonymy signal, a fault, judgement may be made human intervention early due to on-the-spot contamination by dust probe or electric loop fault, and better finishing equipment inspection is resumed work.Simultaneously one-sided two approach switchs by " with " judgement chain operation signal, again with two approach switchs of opposite side " with " the chain operation signal phase "or" judged, having one group of signal mal all can send respective switch amount judges, " with " dragveyer electrical motor run signal compares, electrical motor is stopped transport, and signal is normal, and electrical motor operation, is judged as chain rupture, send " 1 ", the tripping operation of dragveyer electrical motor.
Improved type heat power plant boiler dragveyer chain rupture monitoring for protection device and monitoring system have improved accuracy and the stability of detection signal, and totally 4 groups of signals of separate unit dragveyer completes chain monitoring, to signal is normal, sends out and make effective judgement with mistake; The jackscrew fixed mode of approach switch greatly facilitates repair and maintenance work simultaneously, reduce the situation of dust accretions captive nut card silk, dismounting and change is easy, flexible for installation, save cleaning dust, spray the step of stain remover, avoided the awkward difficult problem that cannot use because of instruments such as narrow space spanners, only need unscrew from top bolt of rear end plate is detachable approach switch, repair quality and efficiency have been improved, meet the demand of carrying out production strictly in line with rules and regulations, ensured unit safety smooth operation, realized the doulbe-sides' victory that ensures that operation and maintenance is safeguarded.
The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned embodiment, also comprises the technical scheme being comprised of above technical characterictic combination in any.
Claims (7)
1. a dragveyer chain rupture monitoring for protection device; it is characterized in that: described monitoring device comprises firm banking; described firm banking is provided with at least two holes on bases in same level; described each holes on base arranges an approach switch; described approach switch is bolted on described firm banking by jackscrew, and described approach switch is electrically connected to dcs.
2. dragveyer chain rupture monitoring for protection device as claimed in claim 1, is characterized in that: described firm banking is platy structure.
3. application rights requires a dragveyer chain rupture monitoring for protection system for the dragveyer chain rupture monitoring for protection device described in 1 or 2, it is characterized in that: the guide wheel that comprises described monitoring device, is oppositely arranged with described monitoring device, the toothed disc that is arranged at described guide wheel both sides, the chain meshing with described toothed disc sawtooth and the oil pump drive motor that drives described chain to rotate.
4. dragveyer chain rupture monitoring for protection system as claimed in claim 3, is characterized in that: the relative position of the toothed disc of described guide wheel both sides arranges respectively firm banking, and two approach switchs in same level are set on described firm banking.
5. dragveyer chain rupture monitoring for protection system as claimed in claim 4, is characterized in that: described approach switch arranges inductor near a side of toothed disc.
6. dragveyer chain rupture monitoring for protection system as claimed in claim 5, is characterized in that: the vertical distance between described two approach switchs and gear is 2-5mm.
7. dragveyer chain rupture monitoring for protection system as claimed in claim 6; it is characterized in that: described monitoring system also comprises wiring terminal box; described approach switch accesses the top interface of described wiring terminal box by cable, the below interface of described wiring terminal box accesses the control housing of described dcs by cable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144486.6A CN103950703A (en) | 2014-04-11 | 2014-04-11 | Submerged chain conveyor chain breakage protection and monitoring device and submerged chain conveyor chain breakage protection and monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410144486.6A CN103950703A (en) | 2014-04-11 | 2014-04-11 | Submerged chain conveyor chain breakage protection and monitoring device and submerged chain conveyor chain breakage protection and monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631060A (en) * | 2018-10-19 | 2019-04-16 | 华电电力科学研究院有限公司 | Coal fired power plant dragveyer chain rupture alarm optimizing detection method |
| CN110683310A (en) * | 2019-09-18 | 2020-01-14 | 江苏射阳港发电有限责任公司 | Chain breakage protection system of scraper slag conveyor |
| CN111174223A (en) * | 2019-12-31 | 2020-05-19 | 华电电力科学研究院有限公司 | Deviation and stalling alarm device of plate-type slag conveyor and control method of deviation and stalling alarm device |
| CN114013959A (en) * | 2021-12-03 | 2022-02-08 | 大唐华银攸县能源有限公司 | Optimization method of chain breakage protection system of embedded scraper conveyor |
| CN115180344A (en) * | 2022-05-06 | 2022-10-14 | 国能神皖合肥发电有限责任公司 | Chain breakage protection system |
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| CN203806604U (en) * | 2014-04-11 | 2014-09-03 | 华能南京金陵发电有限公司 | Submerged chain conveyor chain rupture protection monitoring device and monitoring system |
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2014
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| CN2232108Y (en) * | 1995-01-29 | 1996-07-31 | 张启坤 | Protector for chain rupture or seizing of scraper slag remover |
| CN2257898Y (en) * | 1995-12-18 | 1997-07-16 | 青岛富吉机电设备制造集团公司 | Ring chain protector for scraper dragveyer |
| DE10000681A1 (en) * | 2000-01-10 | 2001-07-12 | Erich Stallkamp | Feeding system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109631060A (en) * | 2018-10-19 | 2019-04-16 | 华电电力科学研究院有限公司 | Coal fired power plant dragveyer chain rupture alarm optimizing detection method |
| CN110683310A (en) * | 2019-09-18 | 2020-01-14 | 江苏射阳港发电有限责任公司 | Chain breakage protection system of scraper slag conveyor |
| CN111174223A (en) * | 2019-12-31 | 2020-05-19 | 华电电力科学研究院有限公司 | Deviation and stalling alarm device of plate-type slag conveyor and control method of deviation and stalling alarm device |
| CN114013959A (en) * | 2021-12-03 | 2022-02-08 | 大唐华银攸县能源有限公司 | Optimization method of chain breakage protection system of embedded scraper conveyor |
| CN115180344A (en) * | 2022-05-06 | 2022-10-14 | 国能神皖合肥发电有限责任公司 | Chain breakage protection system |
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Application publication date: 20140730 |