CN202947144U - Tensioning protective system of chains of submerged chain conveyor - Google Patents
Tensioning protective system of chains of submerged chain conveyor Download PDFInfo
- Publication number
- CN202947144U CN202947144U CN 201220623541 CN201220623541U CN202947144U CN 202947144 U CN202947144 U CN 202947144U CN 201220623541 CN201220623541 CN 201220623541 CN 201220623541 U CN201220623541 U CN 201220623541U CN 202947144 U CN202947144 U CN 202947144U
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- chain
- time relay
- dragveyer
- chains
- switch
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Abstract
The utility model discloses a tensioning protective system of chains of a submerged chain conveyor, wherein the tensioning protective system is used for tensioning protection on the chains of the submerged chain conveyor, and a hydraulic tensioner with one-way mechanical check is arranged at the position of each of the two chains of the submerged chain conveyor to tension the chains. Besides, a first chain-breaking detection switch and a second chain-breaking detection switch are respectively arranged at the positions of the two chains of the submerged chain conveyor. The first chain-breaking detection switch is connected into a power source return circuit after in series connection with a coil of a first time relay. The second chain-breaking detection switch is connected into a power source return circuit after in series connection with a coil of a second time relay. After a normally open contact of the first time relay is connected with a normally open contact of the second time relay in parallel, the normally open contact of the first time relay and a trip switch are in series connection and are connected into the power source return circuit. After chain breaking is detected by the first chain-breaking detection switch or the second chain-breaking detection switch, the corresponding coil of the first time relay or the coil of the second time relay is electriferous, the return circuit where the trip switch is located is switched on, and trip operation is conducted.
Description
Technical field
The present invention relates to a kind of chain tension protection system, relate in particular to a kind of dragveyer chain tension protection system.
Background technology
Dragveyer is in service, and the situations such as scraper plate, chain wear be serious often can occur, and this is normally not enough due to the rigidity of chain tensioning mechanism and mechanism reliability is low causes.
When two chain degrees of tightness of dragveyer were inconsistent, the suffered moment of dragveyer changed.When the load of dragveyer strengthens suddenly, the dragveyer chain pull is magnified, and causes the dragveyer overload, thereby finally causes gear to burst apart.For preventing the generation of above-mentioned situation; be provided with broken chain detecting device in dragveyer; the monitoring point of this broken chain detecting device is arranged on tail guide wheel place; and two wheels of tail guide wheel are synchronous; after a chain breakage; another root chain still driving the operation of tail guide wheel, just can cause tripping operation when only having two chains to disconnect simultaneously, and this has obviously missed best protection opportunity.
Summary of the invention
The present invention is directed to the drawback of prior art, a kind of dragveyer chain tension protection system is provided.
Dragveyer chain tension protection system of the present invention is used for the dragveyer chain is carried out the tensioning protection, the hydraulic tensioner of unidirectional mechanical check is set respectively with tension chain at two chain places of dragveyer; And,
Two chain places at dragveyer arrange respectively the first chain rupture sense switch and the second chain rupture sense switch; Access electric power loop after described the first chain rupture sense switch is connected with very first time relay coil, access electric power loop after described the second chain rupture sense switch is connected with the second time relay coil is after the normally opened contact parallel connection of the normally opened contact of described very first time relay and second time relay, connect with trip switch and access electric power loop again; After the first chain rupture sense switch or the second chain rupture sense switch detected chain rupture and occur, corresponding very first time relay coil or the second time relay coil were charged, and loop, described trip switch place is switched on and carries out trip operation.
In dragveyer chain tension protection system of the present invention, the hydraulic tensioner by the unidirectional mechanical check is set can guarantee that with tension chain chain is in long-term tensioning state, reduces the frictional resistance of scraper plate and base plate, prevents that dragveyer from falling chain, chain jamming; At two chain places, the chain rupture sense switch is set respectively, no matter makes which root chain generation chain rupture, chain jamming, fall chain, can in time carry out the tripping grinder protection.
Description of drawings
Fig. 1 is the principle schematic of chain rupture protection in dragveyer chain tension protection system of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing, can implement according to this with reference to the specification word to make those skilled in the art.
Dragveyer chain tension protection system of the present invention is for the dragveyer chain being carried out the tensioning protection.Be about to the hydraulic tensioner that tension device of slag conveyor of the prior art transform the unidirectional mechanical check as, this hydraulic tensioner is in order to tension chain.Described hydraulic tensioner can specifically be comprised of tank mounting, plug-in accumulator, electric cabinet, and to the accumulator fuel feeding, described accumulator, switch electromagnetic valve and oil cylinder form hydraulic spring grease cup to its power source by engine gear pump.When normal, accumulator inflated with nitrogen pressure is to 0.8MPa, and the accumulator operating pressure reaches 5MPa, more than tensioning pressure reaches 4MPa, can guarantee that chain is in long-time tensioning state.During less than 2MPa, dragveyer can be reported to the police because tensioning pressure is low when gear pump pressure.Two chains of dragveyer (being working chain and backhaul chain) adopt the reliable tensioning apparatus of sliding and running structure, can keep tensile force constant, and in time absorb increment after dragveyer drags chain wear, guarantee chain, the omnidistance tensioning of scraper plate, dragveyer is operated steadily, reduce the frictional resistance of scraper plate and base plate, prevent that dragveyer from falling chain, chain jamming.Described hydraulic jack is double-tube structure and establishes Manual pressurization pump, and two sleeve pipe interlayers are shoe cream room.During normal operation, oil cylinder is supplied with pressure oil by tensioning Hydraulic Station electric oil pump, and accumulator is pressurize and supplementary pressure oil within a period of time.When the Hydraulic Station system failure, the changeable oil return line that adds, oil cylinder force (forcing) pump directly are oil cylinder pressurization tensioning tail wheel.During oil cylinder maintenance retraction, cylinder rod chamber oil-feed forms manual retrieving.
After adopting the hydraulic tensioner of unidirectional mechanical check of the present invention, described chain rupture test point also is improved to two, namely at two chain places of dragveyer, the first chain rupture sense switch and the second chain rupture sense switch is set respectively; Access electric power loop after described the first chain rupture sense switch is connected with very first time relay coil, access electric power loop after described the second chain rupture sense switch is connected with the second time relay coil is after the normally opened contact parallel connection of the normally opened contact of described very first time relay and second time relay, connect with trip switch and access electric power loop again; After the first chain rupture sense switch or the second chain rupture sense switch detected chain rupture and occur, corresponding very first time relay coil or the second time relay coil were charged, and loop, described trip switch place is switched on and carries out trip operation.
Figure 1 shows that the principle schematic of chain rupture protection.As shown in Figure 1, described chain rupture sense switch SQ1 connects with time relay KT1 coil, described chain rupture sense switch SQ2 connects with time relay KT3 coil, the normally-closed contact of described time relay KT1 is connected with time relay KT2 coil, and the normally-closed contact of described time relay KT3 is connected with time relay KT4.Then, as shown in Figure 1, above-mentioned 4 circuit are in parallel again, and the end after parallel connection is connected in zero line N, and the other end is through rotary switch SA1 and the dragveyer indicator cock access live wire 20 that puts into operation.The coil of the auxiliary reclay KA01 of described dragveyer trip switch is with after rotary switch SA1 connects, then connects and access between live wire 20 and zero line N with the normally opened contact of the time relay KT1 of parallel connection, the normally opened contact of time relay KT2, the normally opened contact of time relay KT3, the normally opened contact of time relay KT4, the normally opened contact of auxiliary reclay KA01.
When dragveyer moved, described rotary switch SA1 was in on-position, and the described dragveyer indicator cock that puts into operation is closure state.If there is the chain rupture sense switch dragveyer chain rupture to be detected, be that SQ1 or SQ2 are closed, to make time relay KT1 coil or time relay KT2 coil charged, so, the normally opened contact of time relay KT1 or time relay KT2 can be closed, thereby make the auxiliary reclay KA01 coil of trip switch charged, make the loop, trip switch place of dragveyer be switched on and carry out trip operation.
For the ease of the tripped condition of indication dragveyer, also be provided with the chain rupture indicator lamp with the coils from parallel connection of coils of auxiliary reclay KA01, when the coil of middle relay K A01 was charged, this chain rupture indicator lamp namely was switched on and indicates.
In dragveyer chain tension protection system of the present invention, the hydraulic tensioner by the unidirectional mechanical check is set can guarantee that with tension chain chain is in long-term tensioning state, reduces the frictional resistance of scraper plate and base plate, prevents that dragveyer from falling chain, chain jamming; At two chain places, the chain rupture sense switch is set respectively, no matter makes which root chain generation chain rupture, chain jamming, fall chain, can in time carry out the tripping grinder protection.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and embodiment, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (1)
1. dragveyer chain tension protection system is used for the dragveyer chain is carried out the tensioning protection, it is characterized in that, the hydraulic tensioner of unidirectional mechanical check is set respectively with tension chain at two chain places of dragveyer; And,
Two chain places at dragveyer arrange respectively the first chain rupture sense switch and the second chain rupture sense switch; Access electric power loop after described the first chain rupture sense switch is connected with very first time relay coil, access electric power loop after described the second chain rupture sense switch is connected with the second time relay coil is after the normally opened contact parallel connection of the normally opened contact of described very first time relay and second time relay, connect with trip switch and access electric power loop again; After the first chain rupture sense switch or the second chain rupture sense switch detected chain rupture and occur, corresponding very first time relay coil or the second time relay coil were charged, and loop, described trip switch place is switched on and carries out trip operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623541 CN202947144U (en) | 2012-11-22 | 2012-11-22 | Tensioning protective system of chains of submerged chain conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623541 CN202947144U (en) | 2012-11-22 | 2012-11-22 | Tensioning protective system of chains of submerged chain conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202947144U true CN202947144U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220623541 Expired - Fee Related CN202947144U (en) | 2012-11-22 | 2012-11-22 | Tensioning protective system of chains of submerged chain conveyor |
Country Status (1)
| Country | Link |
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| CN (1) | CN202947144U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317243A (en) * | 2014-11-13 | 2015-01-28 | 江苏大唐国际吕四港发电有限责任公司 | Scraper slag conveyor protection circuit |
-
2012
- 2012-11-22 CN CN 201220623541 patent/CN202947144U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317243A (en) * | 2014-11-13 | 2015-01-28 | 江苏大唐国际吕四港发电有限责任公司 | Scraper slag conveyor protection circuit |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20130522 Termination date: 20131122 |