CN109720786B - Double-telescopic tail chain tensioning device - Google Patents
Double-telescopic tail chain tensioning device Download PDFInfo
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- CN109720786B CN109720786B CN201811478924.7A CN201811478924A CN109720786B CN 109720786 B CN109720786 B CN 109720786B CN 201811478924 A CN201811478924 A CN 201811478924A CN 109720786 B CN109720786 B CN 109720786B
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Abstract
The invention discloses a double-telescopic tail chain tensioning device which comprises a fixed tail frame, a traction chain driving tensioning device and a scraper chain driving tensioning device, wherein the traction chain driving tensioning device and the scraper chain driving tensioning device are both arranged on the fixed tail frame; the traction chain driving and tensioning device and the scraper chain driving and tensioning device achieve tensioning effects by adjusting the distance between the traction chain driving and tensioning device and the fixed tail frame. The tensioning device is used for a chain traction drum shearer system and a coal planer system, solves the tensioning problem of a scraper chain and a traction chain, realizes the respective tensioning of the two chains, ensures that the two chains can be in a proper tension state, and avoids the problems of chain clamping and chain jumping caused by too loose chains and excessive abrasion of chain wheels and chains caused by too tight chains.
Description
Technical Field
The invention belongs to the technical field of coal mine mechanical equipment, and particularly relates to a double-telescopic tail chain tensioning device.
Background
In the coal mine underground longwall comprehensive mechanized coal mining operation, two coal mining systems are provided, one is a drum shearer system, and the other is a coal planer system. The traction modes of the coal mining machine in the drum shearer system comprise chain traction and chainless traction (rack). Both the chain traction drum shearer system and the coal planer system are provided with a scraper chain and a traction chain, and the two chains are high-strength round-link chains for mining.
The circular chain can be extended in the long-term use process, the tension of the chain is reduced, and the tension of the scraper chain can also be changed along with different transportation amounts. It is important to maintain proper chain tension because too little chain tension can cause chain jump or other jamming, too much can accelerate wear of the sprockets, chain and chain way, and can also cause increased drive power.
The re-tensioning of the scraper chain and the drag chain is realized by a shortened chain in the coal plough system. One chain in the chain traction drum shearer system is tensioned by a shortened chain, and the other chain is tensioned by a telescopic tail frame. The chain is cut off a minimum of two links at a time, so the chain must be cut off when the chain is sufficiently slack longer than the pitch of the two links, in a manner that does not ensure that the chain is always under the proper tension. Frequent chain cutting also causes high labor intensity of workers and low production efficiency.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel double-telescopic tail chain tensioning device, which solves the tensioning problem of a scraper chain and a drag chain in a chain traction drum shearer system and a coal planer system.
The technical scheme adopted by the invention is as follows: a double-telescopic tail chain tensioning device comprises a fixed tail frame, a traction chain driving tensioning device and a scraper chain driving tensioning device, wherein the traction chain driving tensioning device and the scraper chain driving tensioning device are both arranged on the fixed tail frame;
the traction chain driving and tensioning device and the scraper chain driving and tensioning device achieve tensioning effects by adjusting the distance between the traction chain driving and tensioning device and the fixed tail frame.
The tensioning device is used for a chain traction drum shearer system and a coal planer system, solves the tensioning problem of a scraper chain and a traction chain, realizes the respective tensioning of the two chains, ensures that the two chains can be in a proper tension state, and avoids the problems of chain clamping and chain jumping caused by too loose chains and excessive abrasion of chain wheels and chains caused by too tight chains. The tensioning device is simple and convenient to operate, flexible and reliable, greatly reduces the labor intensity of workers, avoids time delay caused by frequent chain cutting, improves the starting rate of equipment and improves the production efficiency.
Further, the fixed tail frame is connected with the scraper conveyor.
Further, the scraper chain driving and tensioning device comprises a movable tail frame movably connected to the fixed tail frame and a scraper chain driving assembly arranged on the movable tail frame;
and the fixed tail frame is provided with a scraper chain tensioning oil cylinder for adjusting the gap between the movable tail frame and the fixed tail frame.
Furthermore, a guide groove is formed in the fixed tailstock, and a guide plate which is inserted into the guide groove and guides the movable tailstock to move is arranged on the movable tailstock;
the movable tailstock is pressed on the fixed tailstock through the pressing plate A.
Furthermore, a plurality of positioning pin holes are formed in the fixed tail frame, and the movable tail frame is limited and fixed through fixing pins A inserted into the corresponding positioning pin holes.
Further, scrape chain drive assembly and include the scraper chain drive portion and scrape chain sprocket assembly that mutual transmission is connected, scrape chain sprocket assembly and scrape chain connection and drive and scrape the motion of board chain.
The device further comprises a controller which is connected with the scraper chain tensioning oil cylinder and used for controlling the stroke of the scraper chain tensioning oil cylinder;
the scraper chain tensioning oil cylinder is provided with a pressure sensor and a stroke sensor, and the pressure sensor and the stroke sensor are both connected with the controller and used for feeding back real-time tension;
the controller is also connected with a power supply and a valve block; the controller controls the stretching stroke of the scraper chain tensioning oil cylinder through the valve block.
It is worth to be noted that, firstly, two sensors, namely a pressure sensor and a stroke sensor, are arranged on the scraper chain tensioning oil cylinder at the same time, and real-time tension is calculated by detecting the pressure of the scraper chain tensioning oil cylinder; and the controller and the valve block are used for adjusting the telescopic amount of the oil cylinder, so that the scraper chain can be always in a proper tension state.
Furthermore, the traction chain driving and tensioning device comprises a traction driving frame movably connected to the tail frame of the mobile machine and a traction chain driving assembly arranged on the traction chain driving frame;
a traction chain tensioning oil cylinder for adjusting the gap between the traction driving frame and the fixed tail frame is arranged on the fixed tail frame,
the traction chain driving assembly comprises a traction chain driving part and a traction chain sprocket assembly which are in transmission connection with each other, and the traction chain sprocket assembly is connected with the traction chain and drives the traction chain to move.
Furthermore, a transition plate and a B pressure plate are arranged on one end face, close to the traction chain driving and tensioning device, of the tail frame of the mobile machine; the tension device driven by the traction chain is limited by the transition plate and the pressure plate B to be movably connected with the tail frame of the mobile machine.
Furthermore, a groove is arranged on the traction driving frame, and a guide plate which is inserted into the groove and plays a role in guiding the traction driving frame to do linear reciprocating motion is arranged on the tail frame of the fixing machine;
the traction driving frame and the tail frame of the fixing machine are clamped through a B fixing pin to limit the traction driving frame to move.
The invention has the beneficial effects that:
1. the movable tailstock and the traction driving frame are respectively positioned on the fixed tailstock through pin shafts, the tensioning oil cylinders are respectively connected with the fixed tailstock, the movable tailstock and the traction driving frame are not fixedly connected and are only mutually slideways, so that the two frames can respectively move with respective chain wheels to respectively tension the chains.
2. The tensioning action only needs to control the stretching of the oil cylinder, and the tensioning device is simple and convenient.
3. After the tensioning action is finished, the positioning pin is inserted, the pressure of the oil cylinder is released, and the use reliability is ensured.
4. Besides the manual tensioning, the scraper chain can also be automatically tensioned along with the change of the conveying amount, and the chain is ensured to be always in a proper tension state.
5. The tail frame of the fixing machine is symmetrically designed, and an independent traction driving frame is designed to be provided with a transition plate, so that the use requirements of different left and right working faces of the long-wall fully mechanized mining are met.
6. The controller is powered by a dedicated power supply without using an auxiliary power supply for the work surface control system so that the system can still operate even if the work surface control system fails.
Drawings
FIG. 1 is an isometric view of one side of the scraper chain drive tensioner of the present invention;
FIG. 2 is an isometric view of one side of the drag chain drive tensioner of the present invention;
fig. 3 is a connection diagram of the control system for the automatic tensioning of the scraper chain according to the invention.
In the figure: 1-fixed tail frame, 2-A pin shaft, 3-scraper chain tensioning oil cylinder, 4-guide groove, 5-B pin shaft, 6-A fixed pin, 7-mobile tail frame, 8-A pressing plate, 9-scraper chain driving part, 10-scraper chain sprocket component, 11-traction chain driving part, 12-traction driving frame, 13-transition plate, 14-traction chain tensioning oil cylinder, 15-B fixed pin, 16-guide plate, 17-B pressing plate, 18-groove, 19-pressure sensor, 20-valve block, 21-power supply, 22-controller and 23-stroke sensor.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
this embodiment designs a new two flexible tail chain overspeed device tensioner, solves the tensioning problem of scraping chain and drag chain in chain traction drum shearer system and the coal plough system, and two kinds of chains can be the tensioning respectively, and mutually noninterfere can also realize scraping the automatic tensioning of chain along with the change of transportation volume.
A double-telescopic tail chain tensioning device comprises a fixed tail frame 1, a traction chain driving tensioning device and a scraper chain driving tensioning device, wherein the traction chain driving tensioning device and the scraper chain driving tensioning device are both arranged on the fixed tail frame 1;
the traction chain driving and tensioning device and the scraper chain driving and tensioning device achieve tensioning effects by adjusting the distance between the traction chain driving and tensioning device and the fixed tail frame 1.
This embodiment is used for chain traction drum shearer system and coal plough system, has solved the tensioning problem of scraping chain and drag chain, has realized the tensioning respectively of two kinds of chains, guarantees that two kinds of chains can both be in under the suitable tension state, has avoided blocking respectively and jumping the chain because of the chain is too loose other that leads to the fact to and because of the too tight excessive wearing and tearing of sprocket and the chain that leads to the fact of the chain. The tensioning of this embodiment is simple and convenient, and is nimble reliable, greatly reduced workman intensity of labour, avoid delaying time because of frequently cutting the chain, improved equipment turn-on rate, improved production efficiency.
Example 2:
this embodiment is optimized and limited based on the above embodiment 1, as shown in figures 1-3,
the fixed machine tail frame 1 is connected with a scraper conveyor. The scraper chain driving and tensioning device comprises a movable tailstock 7 movably connected to the fixed tailstock 1 and a scraper chain driving assembly arranged on the movable tailstock 7; and the fixed tail frame 1 is provided with a scraper chain tensioning oil cylinder 3 for adjusting the gap between the movable tail frame 7 and the fixed tail frame 1.
The fixed tailstock 1 is provided with a guide groove 4, and the movable tailstock 7 is provided with a guide plate which is inserted into the guide groove 4 and guides the movable tailstock 7 to move; the movable tailstock 7 is pressed on the fixed tailstock 1 through an A pressing plate 8.
The fixed tail frame 1 is provided with a plurality of positioning pin holes, and the movable tail frame 7 is limited and fixed by inserting the A fixing pin 6 into the corresponding positioning pin hole.
The scraper chain driving component comprises a scraper chain driving part 9 and a scraper chain sprocket component 10 which are in transmission connection with each other, and the scraper chain sprocket component 10 is connected with the scraper chain and drives the scraper chain to move.
The device also comprises a controller 22 which is connected with the scraper chain tensioning oil cylinder 3 and is used for controlling the stroke of the scraper chain oil cylinder 3; the scraper chain tensioning oil cylinder 3 is provided with a pressure sensor 19 and a stroke sensor 23, and both the pressure sensor 19 and the stroke sensor 23 are connected with a controller 22 for feeding back real-time tension; the controller 22 is also connected with a power supply 21 and a valve block 20; the controller 22 controls the extension stroke of the scraper chain tensioning cylinder 3 through the valve block 20.
The traction chain driving and tensioning device comprises a traction driving frame 12 movably connected to the tail frame 7 of the mobile machine and a traction chain driving component arranged on the traction driving frame 12; and a traction chain tensioning oil cylinder 14 for adjusting a gap between the traction driving frame 12 and the fixed tail frame 1 is arranged on the fixed tail frame 1.
A transition plate 13 and a B pressure plate 17 are arranged on one end surface of the tail frame 7 of the mobile machine, which is close to the traction chain driving and tensioning device; the transition plate 13 and the B pressure plate 17 limit the movable connection of the traction chain drive tensioning device and the tail frame 7 of the moving machine.
A groove 18 is arranged on the traction driving frame 12, and a guide plate 16 which is inserted into the groove 18 and plays a role in guiding the linear reciprocating motion of the traction driving frame 12 is arranged on the fixed tail frame 1; the traction driving frame 12 and the tail frame 1 of the fixing machine are clamped through a B fixing pin 15 to limit the traction driving frame 12 to move.
The traction chain driving assembly comprises a traction chain driving part 11 and a traction chain sprocket assembly which are in transmission connection with each other, and the traction chain sprocket assembly is connected with the traction chain and drives the traction chain to move.
The scraper chain driving component comprises a scraper chain driving part and a scraper chain sprocket component which are in transmission connection with each other, and the scraper chain sprocket component is connected with the scraper chain and drives the scraper chain to move. Meanwhile, the whole equipment also comprises a controller which is connected with the scraper chain tensioning oil cylinder and is used for controlling the stroke of the scraper chain oil cylinder; the scraper chain tensioning oil cylinder is provided with a pressure sensor and a stroke sensor, and the pressure sensor and the stroke sensor are both connected with the controller and used for feeding back real-time tension; the controller is also connected with a power supply and a valve block; the controller controls the stretching stroke of the scraper chain tensioning oil cylinder through the valve block.
It is worth to be noted that, firstly, two sensors, namely a pressure sensor and a stroke sensor, are arranged on the scraper chain tensioning oil cylinder at the same time, and the real-time tension is calculated by detecting the pressure and the stroke of the scraper chain tensioning oil cylinder at the same time; and the controller and the valve block are used for adjusting the telescopic amount of the oil cylinder, so that the scraper chain can be always in a proper tension state.
Example 3:
as shown in fig. 1 to 3, the present embodiment provides a dual-telescopic tail chain tensioning mechanism suitable for a chain haulage shearer system and a coal plough system, which mainly includes a fixed tailstock 1, a movable tailstock 7, a haulage driving frame 12, a transition plate 13, a scraper chain tensioning cylinder 3 equipped with a stroke sensor, a haulage chain tensioning cylinder 14, an a pressing plate 8, a B pressing plate 17, an a fixing pin 6, and a B fixing pin 15.
This embodiment can replace the scraper conveyor tail in chain haulage shearer systems and shearer systems. The fixed machine tail frame 1 is connected with a middle groove or a transition groove of the scraper conveyor. The movable tailstock 7 is seated on the fixed tailstock 1, guide plates on two sides of the rear portion of the movable tailstock 7 are inserted into guide grooves 4 on two sides of the fixed tailstock, and the two pressing plates A8 press the front portion of the movable tailstock 7 on the fixed tailstock 1. A scraper chain tensioning oil cylinder 3 provided with a stroke sensor is arranged on the side of a coal wall, the bottom of the oil cylinder is connected to a fixed tail frame 1 through an A pin shaft 2, and a piston rod is connected to a movable tail frame 7 through a B pin shaft 5.
The transition plate 13 is mounted on the side of the mobile tailstock 7 close to the bracket through bolts. The bottom of the side plate of the traction driving frame 12 falls into the guide groove at the lower part of the transition plate 13, the B pressing plate 17 presses the upper part of the traction driving frame 12 on the movable tailstock 7, and the rear groove 18 of the traction driving frame 12 clamps the guide plate 16 of the fixed tailstock 1. The cylinder barrel of the traction chain tensioning oil cylinder 14 is connected to the fixed tailstock 1, and the piston rod is connected to the traction driving frame 12.
The scraper chain driving part 9 and the chain wheel component 10 are installed on the mobile tail frame 7, and the scraper chain tensioning oil cylinder 3 stretches and retracts to push and pull the mobile tail frame 7, so that the tightness of the scraper chain is changed, and the tension of the chain is changed. After the chain has reached the appropriate tension, the mobile tailstock 7 can be positioned on the fixed tailstock 1 by inserting the a fixing pin 6 and then releasing the pressure of the cylinder 3.
The traction chain driving part 11 and the traction chain wheel component are arranged on the traction driving frame 12, and the traction chain tensioning oil cylinder 14 can stretch and draw the traction driving frame 12, so that the tightness of the traction chain is changed, and the tension of the chain is changed. After the chain has reached the appropriate tension, the traction drive carriage 12 can be positioned on the stationary tailstock 1 by inserting the B fixing pin 15 and then releasing the pressure of the cylinder 14.
This embodiment also allows for automatic tensioning of the scraper chain. The automatic tensioning control system includes a pressure sensor 19, a valve block 20, a power source 21, a controller 22, and a travel sensor 23.
A stroke sensor 23 is arranged in the scraper chain tensioning oil cylinder 3, and the expansion amount of the oil cylinder can be measured. A liquid inlet of the piston cavity is provided with a pressure sensor 19 which can measure the pressure of the piston cavity and indirectly calculate the tension of the scraper chain. Under the normal coal mining operating mode, the coal cutter comes and goes between scraper aircraft nose and tail and cuts the coal, falls into the continuous change of the coal volume that scrapes on the scraper aircraft, also causes the continuous change of chain tension, obtains the real-time tension of chain through above-mentioned pressure sensor 19, and rethread controller 22 and valve block 20 adjust the flexible volume of hydro-cylinder 3, can guarantee to scrape the scraper chain and be in under the suitable tension state all the time.
The controller 22 is powered by the dedicated power supply 21 and does not use the auxiliary power supply of the work surface control system so that the system can still operate even if the work surface control system fails.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (6)
1. The utility model provides a two flexible tail chain overspeed device tensioner which characterized in that:
the device comprises a fixed tail frame (1), a traction chain driving and tensioning device and a scraper chain driving and tensioning device which are both arranged on the fixed tail frame (1);
the traction chain driving and tensioning device and the scraper chain driving and tensioning device realize tensioning effect by adjusting the distance between the traction chain driving and tensioning device and the fixed tail frame (1);
the scraper chain driving and tensioning device comprises a movable tail frame (7) movably connected to the fixed tail frame (1) and a scraper chain driving component arranged on the movable tail frame (7);
a scraper chain tensioning oil cylinder (3) for adjusting the gap between the movable tailstock (7) and the fixed tailstock (1) is arranged on the fixed tailstock (1);
the traction chain driving and tensioning device comprises a traction driving frame (12) movably connected to the tail frame (7) of the mobile machine and a traction chain driving assembly arranged on the traction driving frame (12);
a traction chain tensioning oil cylinder (14) for adjusting the gap between the traction driving frame (12) and the fixed tail frame (1) is arranged on the fixed tail frame (1),
the traction chain driving assembly comprises a traction chain driving part (11) and a traction chain sprocket assembly which are in transmission connection with each other, and the traction chain sprocket assembly is connected with the traction chain and drives the traction chain to move;
the fixed machine tail frame (1) is connected with a scraper conveyor;
a guide groove (4) is formed in the fixed tail frame (1), and a guide plate which is inserted into the guide groove (4) and guides the movable tail frame (7) to move is arranged on the movable tail frame (7); the movable tailstock (7) is pressed on the fixed tailstock (1) through an A pressing plate (8);
the movable tailstock and the traction driving frame are respectively positioned on the fixed tailstock through pin shafts, the tensioning oil cylinders are respectively connected with the fixed tailstock, the movable tailstock and the traction driving frame are not fixedly connected but slide ways, and the movable tailstock and the traction driving frame respectively drive respective chain wheels to respectively move and respectively tension chains.
2. The dual-telescopic tail chain tensioner as claimed in claim 1, wherein: the mobile tail frame is characterized in that a plurality of positioning pin holes are formed in the fixed tail frame (1), and the mobile tail frame (7) is limited and fixed by inserting the fixing pins A (6) into the corresponding positioning pin holes.
3. The dual-telescopic tail chain tensioner as claimed in claim 1, wherein: the scraper chain driving component comprises a scraper chain driving part (9) and a scraper chain sprocket component (10) which are in transmission connection with each other, and the scraper chain sprocket component (10) is connected with the scraper chain and drives the scraper chain to move.
4. The dual-telescopic tail chain tensioner as claimed in claim 1, wherein: the scraper chain tensioning oil cylinder (3) is connected with a controller (22) which is used for controlling the stroke of the scraper chain tensioning oil cylinder (3);
a pressure sensor (19) and a stroke sensor (23) are arranged on the scraper chain tensioning oil cylinder (3), and the pressure sensor (19) and the stroke sensor (23) are both connected with a controller (22) for feeding back real-time tension;
the controller (22) is also connected with a power supply (21) and a valve block (20); the controller (22) controls the extension stroke of the scraper chain tensioning oil cylinder (3) through the valve block (20).
5. The dual-telescopic tail chain tensioner as claimed in claim 4, wherein: a transition plate (13) and a B pressure plate (17) are arranged on one end face, close to the traction chain driving and tensioning device, of the tail frame (7) of the mobile machine; the transition plate (13) and the B pressure plate (17) limit the movable connection of the traction chain driving tension device and the tail frame (7) of the mobile machine.
6. The dual-telescopic tail chain tensioner as claimed in claim 5, wherein: a groove (18) is formed in the traction driving frame (12), and a guide plate (16) which is inserted into the groove (18) and plays a role in guiding the traction driving frame (12) to reciprocate linearly is arranged on the fixed tail frame (1);
the traction driving frame (12) and the tail frame (1) of the fixing machine are clamped through a B fixing pin (15) to limit the traction driving frame (12) to move.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811478924.7A CN109720786B (en) | 2018-12-05 | 2018-12-05 | Double-telescopic tail chain tensioning device |
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| CN201811478924.7A CN109720786B (en) | 2018-12-05 | 2018-12-05 | Double-telescopic tail chain tensioning device |
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| CN109720786A CN109720786A (en) | 2019-05-07 |
| CN109720786B true CN109720786B (en) | 2021-05-14 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110525891A (en) * | 2019-09-24 | 2019-12-03 | 山东铁马特种车辆制造有限公司 | A kind of carrier chain automatic takeup for special vehicle |
| CN110758990B (en) * | 2019-10-08 | 2021-07-09 | 中国矿业大学 | Permanent magnet driven mining scraper conveyor chain tension balance control system and method |
| CN112978246A (en) * | 2021-02-01 | 2021-06-18 | 山西天地煤机装备有限公司 | Scraper chain compensation device and tunneling and anchoring integrated machine |
| CN112960337A (en) * | 2021-02-01 | 2021-06-15 | 山西天地煤机装备有限公司 | Scrape chain compensation arrangement and have its anchor all-in-one of digging |
| CN113443345B (en) * | 2021-05-31 | 2023-07-07 | 宁夏天地奔牛实业集团有限公司 | Bottom chain-free scraper conveyor |
| CN113443349B (en) * | 2021-05-31 | 2023-06-30 | 宁夏天地奔牛实业集团有限公司 | Bottom chain-free scraper conveyor for mining |
| CN116853747B (en) * | 2023-09-05 | 2023-11-14 | 太原向明智控科技有限公司 | Scraper chain tensioning control device and method based on inertial navigation |
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| DE3923320C2 (en) * | 1989-07-14 | 1998-04-09 | Dbt Gmbh | Drive and tensioning station of a chain scraper conveyor for mining companies, especially for use in longwall companies and. the like |
| DE4207530A1 (en) * | 1992-03-10 | 1993-09-16 | Westfalia Becorit Ind Tech | Drive chain tension measurement appts. - contains pressure measurement element on gear wheel in gear box, non-removable chain wheel bearing |
| DE10050701B4 (en) * | 2000-10-13 | 2005-02-10 | Dbt Gmbh | Drive and tensioning station of a chain scraper conveyor for mining operations |
| CN2937026Y (en) * | 2006-08-03 | 2007-08-22 | 山东泰山建能机械集团有限公司 | Tail expansion scraper conveyer |
| DE102007030646B4 (en) * | 2007-07-02 | 2016-09-15 | Caterpillar Global Mining Europe Gmbh | Drive station for an underground planing machine as well as repair methods for mining planer |
| DE202008005609U1 (en) * | 2008-04-22 | 2009-06-10 | Bucyrus Dbt Europe Gmbh | Chain guide for a drive chain of a mining machine |
| CN201224615Y (en) * | 2008-05-20 | 2009-04-22 | 宁夏天地奔牛实业集团有限公司 | Locating device for hydraulically extensible tail of scraper conveyor |
| DE202008010791U1 (en) * | 2008-08-05 | 2009-09-17 | Bucyrus Dbt Europe Gmbh | Drive and clamping station for a chain scraper conveyor |
| US9422112B2 (en) * | 2011-07-22 | 2016-08-23 | Joy Mm Delaware, Inc. | Systems and methods for controlling a conveyor in a mining system |
| CN102556603B (en) * | 2012-02-13 | 2014-07-30 | 北京天地玛珂电液控制系统有限公司 | Chain tensioning system of scraper conveyer |
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