CN114671195A - Hydraulic tensioning device and method for scraper conveyor chain for heading machine - Google Patents
Hydraulic tensioning device and method for scraper conveyor chain for heading machine Download PDFInfo
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- CN114671195A CN114671195A CN202210340702.9A CN202210340702A CN114671195A CN 114671195 A CN114671195 A CN 114671195A CN 202210340702 A CN202210340702 A CN 202210340702A CN 114671195 A CN114671195 A CN 114671195A
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- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 abstract description 6
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
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Abstract
The invention belongs to the technical field of construction of tunneling machines, and particularly relates to a hydraulic tensioning device and method for a scraper conveyor chain for a tunneling machine. The invention comprises a scraper chain, a driving mechanism for driving the scraper chain to move, an adjusting mechanism and a hydraulic control mechanism for controlling the adjusting mechanism to adjust the tension of the scraper chain; two movable frames are fixed on the driving mechanism; the adjusting mechanism comprises two fixing frames and two scraper chain tensioning oil cylinders which are arranged in parallel, the positions, located at the top and the top of the guide groove, of the outer sides of the fixing frames are respectively provided with an A guide limiting block and a B guide limiting block, the driving mechanism and the guide grooves of the two fixing frames form a moving pair, and the moving frame of the driving mechanism, the A guide limiting block and the B guide limiting block form a moving pair; the hydraulic control mechanism controls the stretching of the scraper chain tensioning oil cylinder so as to adjust the tensioning force of the scraper chain. The invention ensures that the chain is constantly in a proper tension state, and avoids chain clamping and chain jumping caused by too loose chain.
Description
Technical Field
The invention belongs to the technical field of construction of tunneling machines, and particularly relates to a hydraulic tensioning device and method for a scraper conveyor chain for a tunneling machine.
Background
The development machine is widely applied to the fields of coal mines, non-coal mines, tunnels and the like, and the scraper conveyor is a main transportation part of the development machine and takes charge of coal rock transportation cut by the development machine. The scraper conveyor is arranged in the middle of the development machine, the front end of the scraper conveyor is hinged with the main frame and the shovel plate, the rear part of the scraper conveyor is supported on the frame and comprises the front part of the development machine, the rear part of the development machine, a driving device, a scraper chain and other parts, and the shovel plate guide wheel is connected with the chain wheel at the rear part of the development machine through the scraper chain and is used for conveying coal cut by the development machine. What scrape the board chain and adopt is high strength round-link chain, it is serious to wear and tear at long-term use in-process round-link chain, the chain can extend the pine, chain tension reduces, the too little unable normal meshing of chain and sprocket that can lead to of chain tension that loosens is crossed to the chain, easy chain jamming, pile chain or jump chain, the too big wearing and tearing that can accelerate chain and chain way of chain tension, power loss increases, take place chain breakage, the disconnected tooth phenomenon, cause the emergence of harm or even casualty accident, so it is very necessary to keep the suitable tension of scraper chain. The chain cutting method at least cuts off two chain rings once, cannot ensure that the chain is always in a proper tension state by manually tightening or cutting the chain, is more complicated by frequently tightening or cutting the chain, and can also lead to high labor intensity of workers and low production efficiency.
Aiming at the problems in the prior art, the invention provides a hydraulic tensioning device and method for a scraper conveyor chain for a heading machine, which solve the tensioning problem of the scraper chain for the heading machine.
Disclosure of Invention
The invention provides a hydraulic tensioning device and method for a scraper conveyor chain for a heading machine, aiming at solving the tensioning problem of the scraper chain for the heading machine.
The invention is realized by adopting the following technical scheme: a scraper conveyor chain hydraulic tensioning device for a tunneling machine comprises a scraper chain, a driving mechanism used for driving the scraper chain to move, an adjusting mechanism and a hydraulic control mechanism used for controlling the adjusting mechanism to adjust the tensioning of the scraper chain;
two movable frames are fixed on the driving mechanism;
the adjusting mechanism comprises two fixing frames and two scraper chain tensioning oil cylinders which are arranged in parallel, guide grooves are formed in the fixing frames, A guide limiting blocks and B guide limiting blocks are respectively arranged at the positions, located at the tops and the tops of the guide grooves, of the outer sides of the fixing frames, the driving mechanism and the guide grooves of the two fixing frames form a moving pair, and a moving frame of the driving mechanism, the A guide limiting blocks and the B guide limiting blocks form a moving pair; the cylinder barrel end of the scraper chain tensioning oil cylinder is fixed with the moving frame, the piston rod end of the scraper chain tensioning oil cylinder is connected with the fixing frame, the scraper chain tensioning oil cylinder is connected with the hydraulic control mechanism, and the hydraulic control mechanism controls the extension and retraction of the scraper chain tensioning oil cylinder, so that the tensioning force of the scraper chain is adjusted.
Furthermore, the hydraulic control mechanism comprises a pressure sensor, a stroke sensor, a PLC (programmable logic controller) for controlling the stretching of the scraper chain tensioning oil cylinder and an uninterruptible power supply box for providing an uninterruptible power supply for the PLC;
the pressure sensor is arranged on the rodless cavity side of the scraper chain tensioning oil cylinder and is connected with the PLC through a signal transmission line;
the stroke sensor is arranged in a piston rod of the scraper chain tensioning oil cylinder and is connected with the PLC through a signal transmission line;
and a hydraulic oil circuit is arranged on the scraper chain tensioning oil cylinder, an electromagnetic valve group is arranged on the hydraulic oil circuit, and the electromagnetic valve group is electrically connected with the PLC.
Furthermore, a safety valve bank used for protecting the hydraulic oil circuit from overload is arranged on the hydraulic oil circuit of the scraper chain tensioning oil cylinder.
Further, the driving mechanism comprises a chain wheel assembly, two transition shaft sleeves and two hydraulic motors;
the chain wheel component is meshed with the scraper chain, the chain wheel component and the guide groove form a moving pair, the two moving frames are arranged at the two ends of the chain wheel component, the two ends of the chain wheel component penetrate through the two moving frames respectively to be connected with the transition shaft sleeve, the transition shaft sleeve is connected with the chain wheel component through a spline, and the transition shaft sleeve is connected with the hydraulic motor through a bolt.
Furthermore, a supporting seat is arranged on the fixing frame, the end of a piston rod of the scraper chain tensioning oil cylinder is propped against the supporting seat, and an adjusting cushion plate is arranged between the supporting seat and the end of the piston rod of the scraper chain tensioning oil cylinder in a cushioning mode.
Furthermore, a wear-resistant bottom plate is arranged between the two fixing frames, the wear-resistant bottom plate is positioned below the scraper chain, and a pressing chain plate is arranged at the position, above the scraper chain, of the inner sides of the two fixing frames.
Furthermore, an oil cylinder fixing block used for being connected with a cylinder barrel end of the scraper chain tensioning oil cylinder is arranged on the movable frame.
The PLC acquires the weight of coal transported on a scraper chain, obtains the tension force of the scraper chain through the weight of the coal, compares the tension force with a tension force set value set by the PLC, and controls the opening and closing of an electromagnetic valve group according to the comparison result, so that the stretching of a scraper chain tensioning oil cylinder is controlled, and the scraper chain is tensioned.
Further, the obtained tension is compared with a set value set by a PLC (programmable logic controller), and when the tension is 0.9-1.2 times of the set value, the electromagnetic valve group is positioned at a middle position and is not adjusted; when the tensioning force is less than 0.9 times of the set value, the electromagnetic valve group works in the left position, and a piston rod of the scraper chain tensioning oil cylinder extends out to push the movable frame to move forwards so as to tension the scraper chain; when the tension value is larger than 1.2 times of the set value, the electromagnetic valve group works at the right position, and a piston rod of the scraper chain tensioning oil cylinder contracts to pull the movable frame backwards, so that the scraper chain is loosened.
Go toStep (b), the calculation formula for obtaining the tension of the scraper chain by the weight of the collected coal is as follows, FX=Wz=∫0 L F（x）dx=g0L(f1cos beta. + -. sin beta) + gL (ω cos beta. + -. sin beta), wherein g is0Is the weight of the scraper chain, g is the weight of the coal, L is the length of the scraper conveyor, f1The drag coefficient of the middle trough to the scraper chain, omega the drag coefficient of the middle trough to the coal, beta the inclination angle of the scraper conveyor, WzIs the chain resistance.
Compared with the prior art, the invention has the beneficial effects that:
1. the device controls the stretching of the scraper chain tensioning oil cylinder through the PLC controller, so that the movable frame is pushed and pulled, the distance between the chain wheel assembly and the guide wheel of the scraper conveyor is further adjusted, the tightness of the scraper chain is changed, the tensioning effect is realized, and the tensioning problem of the scraper chain of the scraper conveyor for the coal mine underground development machine is solved;
2. the device is simple, convenient and reliable to operate, 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;
3. the device can adjust the position of the scraper chain according to different requirements in the using process through the hydraulic control mechanism, so that the scraper chain is in a proper tensioning state in real time, the smooth transmission of the whole scraper conveyor chain is ensured, and the transmission efficiency is improved;
4. the movable frame, the guide groove, the chain pressing plate and the scraper chain tensioning oil cylinder of the device are independently and symmetrically arranged, so that tensioning is reliable, and transportation is stable;
5. according to the method, a PLC calculates the tension of the scraper chain according to the collected weight of coal transported on the scraper chain, and compares the tension with a set value, so that an adjustment instruction of opening and closing of a corresponding electromagnetic valve group is made, the tension of the scraper chain is adjusted, and the tension of the scraper chain is adjusted in real time;
therefore, the chain tensioning problem of the scraper conveyor for the development machine is solved, the chain is guaranteed to be constantly in a proper tension state, the phenomenon that the chain is clamped and jumped due to too loose is avoided, and excessive abrasion of the chain wheel and the chain due to too tight chain is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a schematic view of the driving device of the present invention;
in the figure: 1-sprocket assembly, 2-transition shaft sleeve, 3-hydraulic motor, 4-guide groove, 5-moving frame, 6-A guide limiting block, 7-oil cylinder fixing block, 8-fixing frame, 9-B guide limiting block, 10-chain pressing plate, 11-scraper chain tensioning oil cylinder, 12-adjusting base plate, 13-supporting seat, 14-scraper chain, 15-wear-resistant bottom plate, 16-pressure sensor, 17-stroke sensor, 18-safety valve bank, 19-electromagnetic valve bank, 20-PLC controller and 21-uninterruptible power supply box.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, etc. shown in the drawings and attached to the description are only for understanding and reading the disclosure of the present invention, and are not intended to limit the practical conditions of the present invention, so that the present invention has no technical significance, and any modifications of the structures, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a hydraulic tension device and method for scraper conveyor chains for a heading machine comprise a scraper chain 14, a driving mechanism for driving the scraper chain 14 to move, an adjusting mechanism and a hydraulic control mechanism for controlling the adjusting mechanism to adjust tension of the scraper chain 14;
two moving frames 5 are fixed on the driving mechanism;
the adjusting mechanism comprises two fixing frames 8 and two scraper chain tensioning oil cylinders 11 which are arranged in parallel, a guide groove 4 is formed in each fixing frame 8, an A guide limiting block 6 and a B guide limiting block 9 are respectively arranged at the positions, located at the top and the top of each guide groove 4, on the outer side of each fixing frame 8, the driving mechanism and the guide grooves 4 of the two fixing frames 8 form a moving pair, and a moving frame 5 of the driving mechanism, the A guide limiting blocks 6 and the B guide limiting blocks 9 form a moving pair; the cylinder end of the scraper chain tensioning oil cylinder 11 is fixed with the movable frame 5, the piston rod end is connected with the fixed frame 8, the scraper chain tensioning oil cylinder 11 is connected with the hydraulic control mechanism, the hydraulic control mechanism controls the extension of the scraper chain tensioning oil cylinder 11, so that the tensioning force of the scraper chain 14 is adjusted, the hydraulic control mechanism controls the scraper chain tensioning oil cylinder 11 to drive the transition shaft sleeve 2 and the chain wheel assembly 1 of the driving mechanism to slide in the guide groove 4 and the movable frame 5 to move the A guide limiting block 6 and the B guide limiting block 9, and the tensioning force of the scraper chain 14 is adjusted.
The hydraulic control mechanism comprises a pressure sensor 16, a stroke sensor 17, a PLC (programmable logic controller) 20 for controlling the stretching of the scraper chain tensioning oil cylinder 11 and an uninterrupted power supply box 21 for providing an uninterrupted power supply for the PLC 20;
the pressure sensor 16 is arranged on the rodless cavity side of the scraper chain tensioning oil cylinder 11, the pressure sensor 16 is connected with the PLC 20 through a signal transmission line, the pressure sensor 16 collects the pressure on the rodless cavity side of the scraper chain tensioning oil cylinder 11, and then the pressure signal is fed back to the PLC 20;
the stroke sensor 17 is arranged in a piston rod of the scraper chain tensioning oil cylinder 11, the stroke sensor 17 is connected with the PLC 20 through a signal transmission line, and the stroke sensor 17 collects the stroke of the piston rod of the scraper chain tensioning oil cylinder 11 and feeds a stroke signal back to the PLC 20;
and a hydraulic oil circuit is arranged on the scraper chain tensioning oil cylinder 11, an electromagnetic valve group 19 is arranged on the hydraulic oil circuit, and the electromagnetic valve group 19 is electrically connected with a PLC (programmable logic controller) 20.
And a safety valve group 18 for protecting the hydraulic oil circuit from overload is arranged on the hydraulic oil circuit of the scraper chain tensioning oil cylinder 11, and the safety valve group 18 releases pressure when the pressure of the hydraulic circuit is too high, so that the safe and reliable operation of a hydraulic control mechanism is protected, the system is prevented from overload, and the components are damaged.
The driving mechanism comprises a chain wheel assembly 1, two transition shaft sleeves 2 and two hydraulic motors 3;
A supporting seat 13 is arranged on the fixed frame 8, the piston rod end of the scraper chain tensioning oil cylinder 11 is propped against the supporting seat 13, an adjusting base plate 12 is arranged between the supporting seat 13 and the piston rod end of the scraper chain tensioning oil cylinder 11 in a cushioning mode, when the chain reaches proper tension, the stroke of the scraper chain tensioning oil cylinder 11 is fixed by increasing or decreasing the thickness of the adjusting base plate 12, namely, the movable frame 5 is positioned at a certain position, and then the pressure of the scraper chain tensioning oil cylinder 11 is released; the tension adjusting device not only can manually operate the adjusting backing plate 12 to adjust the tension of the chain, but also can realize the automatic tensioning of the scraper chain along with the change of the conveying amount.
And a wear-resistant bottom plate 15 is arranged between the two fixing frames 8, the wear-resistant bottom plate 15 is positioned below the scraper chain 14, the pressing chain plates 10 are arranged at the positions, above the scraper chain 14, of the inner sides of the two fixing frames 8, and the scraper chain 14 is paved between the pressing chain plates 10 and the wear-resistant bottom plate 15, so that the pressing chain plates 10 prevent the scraper chain 14 from jumping.
An oil cylinder fixing block 7 used for being connected with the cylinder barrel end of the scraper chain tensioning oil cylinder 11 is arranged on the movable frame 5, and the scraper chain tensioning oil cylinder 11 is conveniently connected with the movable frame 5.
A hydraulic tensioning method for a scraper conveyor chain for a tunneling machine is characterized in that a PLC (programmable logic controller) 20 acquires the weight of coal transported on a scraper chain 14, the weight of the coal is used for obtaining the tension of the scraper chain 14, the tension is compared with a tension set value set by the PLC 20, the PLC 20 controls the opening and closing of an electromagnetic valve group 19 according to the comparison result so as to control the stretching and retracting of a scraper chain tensioning oil cylinder 11 and tension the scraper chain 14, the size of an opening of the electromagnetic valve group 19 is determined by analyzing, judging and processing data according to the pressure of the rodless cavity side of the scraper chain tensioning oil cylinder 11 acquired by a pressure sensor 16 acquired by the PLC 20, the stretching length of a piston rod of the scraper chain tensioning oil cylinder 11 acquired by a stroke sensor 17 and the acquired tension, so as to control the opening and closing of a reversing electromagnetic valve group 19 and control the stretching and retracting of a tensioning oil cylinder I and a tensioning oil cylinder II, the chain wheel assembly 1 is pushed to move, so that the tension of the scraper chain 14 is in an optimal range, and the safe and reliable operation of the scraper conveyor is ensured.
Comparing the obtained tension with a set value set by the PLC 20, and when the tension is 0.9-1.2 times of the set value, the electromagnetic valve group 19 is positioned at a middle position and is not adjusted; when the tension force is less than 0.9 times of the set value, the electromagnetic valve group 19 works in the left position, and the piston rod of the scraper chain tensioning oil cylinder 11 extends out to push the movable frame 5 to move forwards, so that the scraper chain 14 is tensioned; when the tension value is larger than 1.2 times of the set value, the electromagnetic valve group 19 works at the right position, and the piston rod of the scraper chain tensioning oil cylinder 11 contracts to pull the movable frame 5 backwards, so that the scraper chain 14 is loosened.
The PLC 20 is also provided with an upper limit protection value and a lower limit protection value, and when the tension is smaller than the lower limit protection value or larger than the upper limit protection value, the scraper conveyor is stopped.
The tension of each point of the scraper chain in the operation is linearly distributed along with the load and the operation direction and continuously changes, the scraper chain belongs to dynamic tension, when the scraper conveyor chain pulls and transports coal at the bottom plate of the middle groove, the chain and the coal transported by the chain are subjected to resistance from the bottom plate of the middle groove, the resistance applied to a certain point of the chain and the tension of the chain at the point are always equal in magnitude and opposite in direction and occur in pairs, the tension of the certain point of the chain can be known by obtaining the resistance applied to the point, the tension FX of the certain point of the chain is a linear function of the position x where the chain is located, namely, FX = Fxdx, so thatThe calculation formula for obtaining the tension of the scraper chain 14 by the weight of the collected coal is as follows, FX=Wz=∫0 L F（x）dx=g0L(f1cos beta. + -. sin beta) + gL (ω cos beta. + -. sin beta), wherein g is0Weight of scraper chain, g weight of coal, L length of scraper conveyor, f1The drag coefficient of the middle trough to the scraper chain, omega the drag coefficient of the middle trough to the coal, beta the inclination angle of the scraper conveyor, WzIs the chain resistance. In the formula, the principle of determining the plus and minus signs is that when the component force of the scraper chain and the coal in the running direction of the conveyor is the same as the moving resistance direction, the plus sign is taken; when the opposite is true, the "-" sign is taken.
The scraper chain tensioning oil cylinder 11 is an execution mechanism and is used for pushing the movable frame 5 to move, the distance between the movable frame 5 and the fixed frame 8 is adjusted through the scraper chain tensioning oil cylinder 11 to achieve a tensioning effect, the tightness of the scraper chain 14 is changed, and the tensioning force of the scraper chain 14 is adjusted, so that the automatic tensioning of the scraper chain is achieved.
The PLC 20 is used for opening the electromagnetic valve group 19, and the PLC 20 controls the stretching stroke of the scraper chain tensioning oil cylinder 11 through the electromagnetic valve group 19.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a scraper conveyor chain hydraulic tensioning device for entry driving machine which characterized in that: the device comprises a scraper chain (14), a driving mechanism for driving the scraper chain (14) to move, an adjusting mechanism and a hydraulic control mechanism for controlling the adjusting mechanism to adjust the tension of the scraper chain (14);
two moving frames (5) are fixed on the driving mechanism;
the adjusting mechanism comprises two fixing frames (8) and two scraper chain tensioning oil cylinders (11) which are arranged in parallel, a guide groove (4) is formed in each fixing frame (8), a guide limiting block A (6) and a guide limiting block B (9) are respectively arranged at the positions, located at the top and the top of each guide groove (4), of the outer side of each fixing frame (8), the driving mechanism and the guide grooves (4) of the two fixing frames (8) form a moving pair, and a moving frame (5) of the driving mechanism, the guide limiting blocks A (6) and the guide limiting blocks B (9) form a moving pair; the cylinder end of the scraper chain tensioning oil cylinder (11) is fixed with the moving frame (5), the piston rod end is connected with the fixing frame (8), the scraper chain tensioning oil cylinder (11) is connected with the hydraulic control mechanism, and the hydraulic control mechanism controls the stretching of the scraper chain tensioning oil cylinder (11) so as to adjust the tensioning force of the scraper chain (14).
2. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 1, wherein: the hydraulic control mechanism comprises a pressure sensor (16), a stroke sensor (17), a PLC (programmable logic controller) controller (20) for controlling the stretching of the scraper chain tensioning oil cylinder (11) and an uninterruptible power supply box (21) for providing an uninterruptible power supply to the PLC controller (20);
the pressure sensor (16) is arranged on the rodless cavity side of the scraper chain tensioning oil cylinder (11), and the pressure sensor (16) is connected with the PLC (programmable logic controller) controller (20) through a signal transmission line;
the stroke sensor (17) is arranged in a piston rod of the scraper chain tensioning oil cylinder (11), and the stroke sensor (17) is connected with the PLC (programmable logic controller) controller (20) through a signal transmission line;
and a hydraulic oil circuit is arranged on the scraper chain tensioning oil cylinder (11), an electromagnetic valve group (19) is arranged on the hydraulic oil circuit, and the electromagnetic valve group (19) is electrically connected with the PLC (programmable logic controller) (20).
3. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 2, wherein: and a safety valve group (18) for protecting the overload of the hydraulic oil path is arranged on the hydraulic oil path of the scraper chain tensioning oil cylinder (11).
4. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 2, wherein: the driving mechanism comprises a chain wheel assembly (1), two transition shaft sleeves (2) and two hydraulic motors (3);
sprocket subassembly (1) and scraper chain (14) meshing, sprocket subassembly (1) and guide way (4) constitute and remove vice, two the both ends of sprocket subassembly (1) are located in removal frame (5), and the both ends of sprocket subassembly (1) are passed two respectively and are removed frame (5) and be connected with transition axle sleeve (2), and transition axle sleeve (2) pass through splined connection with sprocket subassembly (1), and pass through bolted connection with hydraulic motor (3) transition axle sleeve (2).
5. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 4, wherein: the scraper chain tensioning mechanism is characterized in that a supporting seat (13) is arranged on the fixing frame (8), the piston rod end of the scraper chain tensioning oil cylinder (11) is abutted against the supporting seat (13), and an adjusting base plate (12) is arranged between the supporting seat (13) and the piston rod end of the scraper chain tensioning oil cylinder (11).
6. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 5, wherein: and a wear-resistant bottom plate (15) is arranged between the two fixing frames (8), the wear-resistant bottom plate (15) is positioned below the scraper chain (14), and the positions, above the scraper chain (14), of the inner sides of the two fixing frames (8) are provided with chain pressing plates (10).
7. The hydraulic tensioning device for the scraper conveyor chain for the heading machine as claimed in claim 6, wherein: and an oil cylinder fixing block (7) used for being connected with the cylinder barrel end of the scraper chain tensioning oil cylinder (11) is arranged on the movable frame (5).
8. The tensioning method of the hydraulic tensioning device of the scraper conveyor chain for the heading machine is characterized in that the tensioning method comprises the following steps: the PLC (20) collects the weight of coal transported on the scraper chain (14), obtains the tension of the scraper chain (14) through the weight of the coal, compares the tension with a tension set value set by the PLC (20), and controls the opening and closing of the electromagnetic valve group (19) according to the comparison result, so that the stretching of the scraper chain tensioning oil cylinder (11) is controlled, and the scraper chain (14) is tensioned.
9. The hydraulic tensioning method for the scraper conveyor chain for the heading machine as claimed in claim 8, wherein: comparing the obtained tension with a set value set by a PLC (20), and when the tension is 0.9-1.2 times of the set value, the electromagnetic valve group (19) is positioned at a middle position and is not adjusted; when the tensioning force is less than 0.9 times of the set value, the electromagnetic valve group (19) works at the left position, and a piston rod of the scraper chain tensioning oil cylinder (11) extends out to push the movable frame (5) to move forwards, so that the scraper chain (14) is tensioned; when the tension value is larger than 1.2 times of the set value, the electromagnetic valve group (19) works at the right position, and the piston rod of the scraper chain tensioning oil cylinder (11) contracts to pull the movable frame (5) backwards so as to enable the scraper chain (14) to be loosened.
10. The hydraulic tensioning method for the scraper conveyor chain for the heading machine according to claim 9, characterized in that: the calculation formula for obtaining the tension force of the scraper chain (14) through the weight of the collected coal is as follows, FX=Wz=∫0 L F（x）dx=g0L(f1cos beta. + -. sin beta) + gL (ω cos beta. + -. sin beta), wherein g is0Is the weight of the scraper chain, g is the weight of the coal, L is the length of the scraper conveyor, f1The drag coefficient of the middle trough to the scraper chain, omega the drag coefficient of the middle trough to the coal, beta the inclination angle of the scraper conveyor, WzIs the chain resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340702.9A CN114671195A (en) | 2022-04-02 | 2022-04-02 | Hydraulic tensioning device and method for scraper conveyor chain for heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340702.9A CN114671195A (en) | 2022-04-02 | 2022-04-02 | Hydraulic tensioning device and method for scraper conveyor chain for heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114671195A true CN114671195A (en) | 2022-06-28 |
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| CN202210340702.9A Pending CN114671195A (en) | 2022-04-02 | 2022-04-02 | Hydraulic tensioning device and method for scraper conveyor chain for heading machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102684840B1 (en) * | 2023-12-13 | 2024-07-15 | 엔탑컨버전스 주식회사 | Chain tension control system for trash removing machine |
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| CN102556602A (en) * | 2012-02-13 | 2012-07-11 | 北京天地玛珂电液控制系统有限公司 | Scraper conveyor with chain tensioning system |
| CN204916959U (en) * | 2015-08-27 | 2015-12-30 | 成都大漠石油机械有限公司 | Can improve raw materials transport efficiency's in oil development equipment |
| CN106829391A (en) * | 2017-01-20 | 2017-06-13 | 中国矿业大学 | A kind of drag conveyor load monitoring device and chain tension evaluation method |
| CN109720786A (en) * | 2018-12-05 | 2019-05-07 | 中国煤炭科工集团太原研究院有限公司 | A kind of double telescopic machine tail chain stretching devices |
| CN113697391A (en) * | 2021-09-14 | 2021-11-26 | 宁夏天地西北煤机有限公司 | Tension force regulating and controlling system and method adaptive to working conditions of gate-way belt conveyor |
| CN113911651A (en) * | 2021-10-09 | 2022-01-11 | 安徽森铭信息科技有限公司 | Band conveyer convenient to adjust belt elasticity |
| CN217625760U (en) * | 2022-04-02 | 2022-10-21 | 中煤华晋集团有限公司 | Hydraulic tensioning device for scraper conveyor chain for heading machine |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1467580A (en) * | 1975-02-05 | 1977-03-16 | Bergwerksverband Gmbh | Chain tensioning device for a chain driven machine |
| CN102556602A (en) * | 2012-02-13 | 2012-07-11 | 北京天地玛珂电液控制系统有限公司 | Scraper conveyor with chain tensioning system |
| CN204916959U (en) * | 2015-08-27 | 2015-12-30 | 成都大漠石油机械有限公司 | Can improve raw materials transport efficiency's in oil development equipment |
| CN106829391A (en) * | 2017-01-20 | 2017-06-13 | 中国矿业大学 | A kind of drag conveyor load monitoring device and chain tension evaluation method |
| CN109720786A (en) * | 2018-12-05 | 2019-05-07 | 中国煤炭科工集团太原研究院有限公司 | A kind of double telescopic machine tail chain stretching devices |
| CN113697391A (en) * | 2021-09-14 | 2021-11-26 | 宁夏天地西北煤机有限公司 | Tension force regulating and controlling system and method adaptive to working conditions of gate-way belt conveyor |
| CN113911651A (en) * | 2021-10-09 | 2022-01-11 | 安徽森铭信息科技有限公司 | Band conveyer convenient to adjust belt elasticity |
| CN217625760U (en) * | 2022-04-02 | 2022-10-21 | 中煤华晋集团有限公司 | Hydraulic tensioning device for scraper conveyor chain for heading machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102684840B1 (en) * | 2023-12-13 | 2024-07-15 | 엔탑컨버전스 주식회사 | Chain tension control system for trash removing machine |
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