CN115367417A - Heavy-load mining scraper conveyor chain tension control test system and method - Google Patents

Heavy-load mining scraper conveyor chain tension control test system and method Download PDF

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Publication number
CN115367417A
CN115367417A CN202211012088.XA CN202211012088A CN115367417A CN 115367417 A CN115367417 A CN 115367417A CN 202211012088 A CN202211012088 A CN 202211012088A CN 115367417 A CN115367417 A CN 115367417A
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China
Prior art keywords
tail
chain
hydraulic cylinder
load
pressure sensor
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CN202211012088.XA
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Chinese (zh)
Inventor
赖伟
朱真才
沈刚
李翔
汤裕
黄建栋
郭杰
王威
柏德恩
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Priority to CN202211012088.XA priority Critical patent/CN115367417A/en
Publication of CN115367417A publication Critical patent/CN115367417A/en
Pending legal-status Critical Current

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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
    • B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
    • 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
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • 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
    • B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
    • B65G19/18—Details
    • B65G19/20—Traction chains, ropes, or cables
    • 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
    • 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
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/02—Devices for feeding articles or materials to conveyors
    • B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
    • B65G47/18—Arrangements or applications of hoppers or chutes
    • 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
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/02—Control or detection
    • B65G2203/0266—Control or detection relating to the load carrier(s)
    • 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
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means
    • B65G2203/042—Sensors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The invention discloses a chain tension control test system of a scraper conveyor for heavy-load mines, which comprises a random coal dropping device, a tail load force adjusting device and a chain tension adjusting device, wherein the random coal dropping device comprises a coal dropping device, a tail load force adjusting device and a chain tension adjusting device; the random coal dropping device is used for controlling the size of an opening at the bottom of the coal dropping bin and realizing the interference of the size of the coal dropping quantity on the tension of the chain; the chain tension adjusting device comprises a telescopic tail which is connected to the tail of the scraper conveyor in a sliding manner and a tensioning hydraulic cylinder which is used for controlling the telescopic tail to slide back and forth, a chain wheel at the rear end of the scraper conveyor is arranged on the telescopic tail, and the tensioning hydraulic cylinder controls the chain wheel to move back and forth through the telescopic tail so as to control the tensioning degree of the scraper chain; the tail load force adjusting device comprises a load hydraulic cylinder, wherein the extension end of the load hydraulic cylinder is connected with the telescopic tail and used for providing different load forces to the tail of the scraper conveyor to balance the gravity of the tail and compensate the influence of the friction force of the tail on the chain tension.

Description

Heavy-load mining scraper conveyor chain tension control test system and method
Technical Field
The invention relates to the field of underground coal mine material transportation, in particular to a system and a method for testing chain tension control of a scraper conveyor for heavy-load mines.
Background
A mining heavy-load scraper conveyor is one of fully-mechanized coal mining core equipment in a coal mine, and a scraper chain is a key part which has the shortest service life and is most prone to safety accidents in the scraper conveyor. Under the normal operation state of the scraper conveyor, the chain wheel drives the chain and the scraper to drive the coal blocks to move forward at a constant speed, and the fallen coal cut by the coal cutter is conveyed to the transfer crusher. Under the influence of factors such as coal block resistance, working position/speed of a coal mining machine, geological conditions and the like, the load borne by the chain wheel driving device is changed constantly, and under the action of variable rigidity of the chain and the polygonal effect of the chain wheel, the chain tensioning system can be subjected to additional interference from material load; coal cut by the coal mining machine has randomness, and material load is mainly transmitted to the tail chain wheel through the chain to form active dragging interference on the whole telescopic tail, so that the tension control performance of the chain is reduced and even fails. In addition, the heavy-duty scraper conveyor has large tail gravity, and the chain tensioning system needs to overcome the heavy-duty tail friction force accounting for the tensioning force in a higher proportion, so that the heavy-duty scraper conveyor has stronger interference on the control performance of the system. At present, the tension adjusting mode of the scraper conveyor chain in practical application is mainly a method for machine halt passive adjustment, has no real-time adjusting and controlling performance, and is not beneficial to adjusting and maintaining the tension of the scraper conveyor chain in the transportation process.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a system and a method for controlling and testing the chain tension of a scraper conveyor for heavy-load mines, which can solve the problem of friction compensation of a heavy tail in the working process of the scraper conveyor.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a chain tension control test system of a scraper conveyor for heavy-load mines,
comprises a random coal dropping device, a tail load force adjusting device and a chain tension adjusting device;
the random coal dropping device comprises a coal dropping bin, an opening at the bottom of the coal dropping bin faces to a chain of the scraper conveyor and is connected with a coal baffle plate capable of being covered in a sliding mode, the coal baffle plate is connected with a piston rod of a servo hydraulic cylinder, and the servo hydraulic cylinder controls the size of the opening at the bottom of the coal dropping bin through the coal baffle plate so as to control the size of coal dropping quantity to interfere with the tension of the chain;
the chain tension adjusting device comprises a telescopic tail and a tensioning hydraulic cylinder, the telescopic tail is connected to the tail of the scraper conveyor in a sliding mode, the tensioning hydraulic cylinder is used for controlling the telescopic tail to slide back and forth, a guide rail is arranged below the telescopic tail, the telescopic tail can move transversely on the guide rail, a chain wheel at the rear end of the scraper conveyor is arranged on the telescopic tail, and the tensioning hydraulic cylinder controls the chain wheel to move back and forth through the telescopic tail so as to control the tensioning degree of the scraper chain;
the tail load force adjusting device comprises a load hydraulic cylinder which is longitudinally arranged, the extending end of the load hydraulic cylinder is connected with the telescopic tail, the load hydraulic cylinder can provide different load forces for the telescopic tail and the scraper tail to balance the gravity of the tail, and the influence of the friction force of the tail on the chain tension is compensated.
Preferably, still including the random coal breakage control system who is used for controlling servo pneumatic cylinder piston rod extension volume, random coal breakage control system is including establishing the first displacement sensor who is used for monitoring its piston rod extension length on servo pneumatic cylinder and monitoring its pneumatic cylinder pressure's first pressure sensor, be connected with first pressure sensor that draws between servo pneumatic cylinder's piston rod and the fender coal board, servo pneumatic cylinder, first displacement sensor, first pressure sensor, first draw pressure sensor electric connection controller respectively, the controller can realize real-time supervision.
Preferably, the tail load force control system is used for controlling the extension of a piston rod of the load hydraulic cylinder;
the tail load force control system comprises a second displacement sensor and a second pressure sensor, the second displacement sensor is arranged on a load hydraulic cylinder and used for monitoring the extension length of a piston rod of the load hydraulic cylinder, the second pressure sensor is used for monitoring the pressure of the hydraulic cylinder, a second pull pressure sensor is connected between the piston rod of the load hydraulic cylinder and the tail of the scraper conveyor, the load hydraulic cylinder, the second displacement sensor, the second pressure sensor and the second pull pressure sensor are respectively electrically connected with a controller, and the controller can realize real-time monitoring.
Preferably, the chain tension control system is used for controlling the extension amount of a piston rod of the tensioning hydraulic cylinder;
the chain tension control system comprises a third displacement sensor and a third pressure sensor, the third displacement sensor is arranged on the tensioning hydraulic cylinder and used for monitoring the extension length of a piston rod of the tensioning hydraulic cylinder, the third pressure sensor is used for monitoring the pressure of the hydraulic cylinder, a third pull pressure sensor is connected between the piston rod of the tensioning hydraulic cylinder and the tail of the telescopic machine, the tensioning hydraulic cylinder, the third displacement sensor, the third pressure sensor and the third pull pressure sensor are respectively electrically connected with the controller, and the controller can realize real-time monitoring.
Preferably, a chain wheel on the telescopic tail is provided with a scraper chain strain gauge on a chain meshed with the chain wheel for monitoring the tension distribution condition of the whole scraper chain in real time; and the chain tension signal acquired by the scraper chain strain gauge is transmitted to the controller in a wireless transmission mode.
Specifically, scrape trigger chain foil gage mounted position department and be equipped with wireless signal emitter, chain tension control system still includes wireless signal acquisition system, wireless signal receiver among the wireless signal acquisition system receives the scraper chain tension signal that comes from wireless signal emitter and transmits to the controller, the third that links to each other with heavy machine tail draws pressure sensor with signal transmission to the conditioning module (can realize the isolation transmission of signal and the conversion of voltage current signal) through handling the back and get into the controller, the controller adjusts tensioning hydraulic cylinder length of going out the pole according to the predetermined calculated value to this adjusts scraper chain tensioning degree.
The invention also provides a use method of the heavy-duty mining scraper conveyor chain tension control test system, which comprises the following steps:
s1, setting a chain tension reference value in a controller, collecting an integral tension signal of a scraper chain by a third pull pressure sensor and synchronously sending the signal to the controller, and controlling the inlet and outlet length of a piston rod of a tensioning hydraulic cylinder by the controller to realize tension control of the scraper chain;
s2, setting a pressure value of the loader tail in the controller, acquiring a pressure signal between the loader tail and the load hydraulic cylinder by a second pull pressure sensor, synchronously sending the pressure signal to the controller, and controlling the length of a piston rod of the load hydraulic cylinder to enter and exit by the controller to realize the gravity control of the analog loader tail;
and S3, giving a random signal to the controller, controlling the inlet and outlet length of a piston rod of the servo hydraulic cylinder by the controller randomly, and controlling the opening at the bottom of the coal storage bin to smile through the coal blocking plate to realize random coal dropping so as to achieve random coal dropping impact on the scraper chain.
The invention has the beneficial effects that:
1. the chain tension control system simulates the actual condition that the coal briquette falls down to control the chain tension, is more practical, restores the real working condition, realizes the test of the chain tension control system of the scraper conveyor under the random coal falling working condition, and solves the problem of control and adjustment under the condition that the chain tension is time-varying;
2. according to the invention, the tail load force adjusting hydraulic cylinder is adopted to simulate the gravity of the heavy tail, so that the friction force between the heavy tail and the guide rail of the heavy tail is realized, the friction between the heavy tail and the guide rail under the real working condition is reduced, the proportion of the friction force of the heavy tail required by the chain tensioning system in the tensioning force is greatly increased, and the interference of the heavy tail on the tensioning force is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a chain tension control test system of a scraper conveyor for heavy-load mines, provided by an embodiment of the invention;
FIG. 2 is a top view of a face conveyor provided by an embodiment of the present invention;
FIG. 3 is a control schematic diagram of a random coal dropping device provided by an embodiment of the invention;
fig. 4 is a flowchart of the tension control testing system of the scraper conveyor chain for heavy-duty mines, provided by the embodiment of the invention.
Description of the reference numerals:
1. a third pressure sensor; 2. tensioning a hydraulic cylinder; 3. a second pull pressure sensor; 4. a second pressure sensor; 5. a load hydraulic cylinder; 6. a third pull pressure sensor; 7. a sprocket; 8. a telescopic tail; 9. a random coal dropping device; 10. a load side; 11. a third displacement sensor; 12. a lower computer; 13. driving a machine head; 14. an upper computer; 15. a squeegee; 16. a chain; 17. coal briquettes; 18. driving the tail of the machine; 19. a second displacement sensor; 20. a servo hydraulic cylinder; 21. a first displacement sensor; 22. a first pull pressure sensor; 23. a coal storage bin; 24. a coal baffle plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, a tension control test system for a scraper conveyor chain for heavy-duty mines, the chain of the scraper conveyor is driven by a head drive 13 and a tail drive 18, see fig. 1;
the system comprises a random coal dropping device 9, a machine tail load force adjusting device, a chain tension adjusting device, a random coal dropping control system for controlling the extension amount of a piston rod of a servo hydraulic cylinder 20, a machine tail load force control system for controlling the extension amount of a piston rod of a load hydraulic cylinder 5 and a chain tension control system for controlling the extension amount of a piston rod of a tensioning hydraulic cylinder 2;
the random coal dropping device 9 comprises a coal dropping bin 23, an opening at the bottom of the coal dropping bin 23 faces the scraper conveyor chain 16 and is connected with a coal baffle plate 24 capable of being covered in a sliding mode, the coal baffle plate 24 is connected with a piston rod of a servo hydraulic cylinder 20, the servo hydraulic cylinder 20 controls the size of the opening at the bottom of the coal dropping bin 23 through the coal baffle plate 24, and the interference of the coal dropping amount of the coal block 17 on the chain tension is controlled;
the chain tension adjusting device comprises a telescopic tail 8 connected to the tail of the scraper conveyor in a sliding mode and a tensioning hydraulic cylinder 2 used for controlling the telescopic tail 8 to slide back and forth, a guide rail is arranged below the telescopic tail 8, the telescopic tail 8 can move transversely on the guide rail, a chain wheel 7 at the rear end of the scraper conveyor is arranged on the telescopic tail 8, and the tensioning hydraulic cylinder 2 controls the chain wheel 7 to move back and forth through the telescopic tail 8 so as to control the tensioning degree of the scraper chain;
the tail load force adjusting device comprises a load hydraulic cylinder 5 which is longitudinally arranged, the extending end of the load hydraulic cylinder 5 is connected with a telescopic tail 8, the load hydraulic cylinder 5 can provide different load forces for the telescopic tail 8 and the scraper tail to balance the gravity of the tail, and the influence of the friction force of the tail in the chain tension is compensated.
The random coal breakage control system comprises a first displacement sensor 21 and a first pressure sensor, the first displacement sensor 21 is arranged on a servo hydraulic cylinder 20 and used for monitoring the extension length of a piston rod of the servo hydraulic cylinder, the first pressure sensor is used for monitoring the pressure of the hydraulic cylinder, a first pull pressure sensor 22 is connected between the piston rod of the servo hydraulic cylinder 20 and a coal baffle plate 24, and the servo hydraulic cylinder 20, the first displacement sensor 21, the first pressure sensor and the first pull pressure sensor 22 are respectively electrically connected with a controller.
The tail load force control system comprises a second displacement sensor 19 and a second pressure sensor 4, the second displacement sensor 19 is arranged on a load hydraulic cylinder 5 and used for monitoring the extension length of a piston rod of the load hydraulic cylinder, the second pressure sensor 4 is used for monitoring the pressure of the hydraulic cylinder of the load hydraulic cylinder 5, a second pull pressure sensor 3 is connected between the piston rod of the load hydraulic cylinder 5 and the tail of the scraper conveyor, and the load hydraulic cylinder, the second displacement sensor 19, the second pressure sensor 4 and the second pull pressure sensor 3 are respectively and electrically connected with a controller.
Chain tension control system is including establishing third displacement sensor 11 that is used for monitoring its piston rod extension length on tensioning pneumatic cylinder 2 and monitoring the third pressure sensor 1 of its pneumatic cylinder pressure, be connected with the third between tensioning pneumatic cylinder 2's piston rod and the flexible tail 8 and draw pressure sensor 6, tensioning pneumatic cylinder 2, third displacement sensor 11, third pressure sensor 1, third draw pressure sensor 6 electric connection controller respectively.
A chain wheel 7 on the telescopic tail 8 is provided with a scraper chain strain gauge on a chain 16 meshed with the chain wheel for monitoring the tension distribution condition of the whole scraper chain in real time; and a chain tension signal acquired by the scraper chain strain gauge is transmitted to a controller of the lower computer 12 in a wireless transmission mode, and the tension of the scraper chain is displayed by the upper computer 14.
The upper computer 14 is used for issuing commands to the lower computer 12, the upper computer 14 is connected with the lower computer 12 through the Ethernet, and the TCP/IP protocol is adopted for bidirectional data transmission.
The lower computer 12 comprises a controller, a wireless signal acquisition system, an analog output D/A board card (a PCI-6208 board card is adopted to realize the conversion of digital signals to analog signals), an analog acquisition A/D board card (a PCI-1716 board card and a PCI-1784 board card are adopted to realize the conversion of analog signals to digital signals) and a conditioning module (the isolation transmission of signals and the conversion of voltage and current signals are realized);
the chain tension control system is a closed-loop control system, a reference chain tension value is given, a chain tension signal acquired by a scraper chain strain gauge is transmitted to a conditioning module through a wireless signal transmitting device and a wireless signal receiving device for processing, then is converted into a digital signal through a PCI-1716 board card, the upper computer 14 displays that the stress magnitude of the chain 16 at each position can be monitored in real time, a pulling pressure signal acquired by a third pulling pressure sensor 6 is transmitted to the PCI-1716 board card through the conditioning module to be converted into a digital signal, a controller calculates the rod extension length of a piston rod of the tensioning hydraulic cylinder 2 according to the presetting, the digital signal is converted into an analog quantity through the PCI-6208 board card, a servo valve connected with the tensioning hydraulic cylinder 2 is controlled to act through the conditioning module, the rod extension length of the tensioning hydraulic cylinder 2 is adjusted according to adjust the chain tensioning degree, and the tensioning hydraulic cylinder 2 is fixed on an external support frame.
In the tail load force control system, a controller gives a reference tail load force in advance, a pull pressure signal of the second pull pressure sensor 3 is processed by a conditioning module and then transmitted to a PCI-1784 board card, the PCI-1784 board card converts acquired analog quantity into a digital signal, the controller calculates the rod-out length of the load hydraulic cylinder 5 according to preset (the digital signal is converted into analog quantity through the PCI-6208 board card, and the conditioning module controls a servo valve of the load hydraulic cylinder 5) to adjust the load force of the telescopic tail and compensate the friction force between the telescopic tail 8 and a guide rail. In the chain tension adjusting process, the telescopic tail 8 slides on the guide rail, and the load hydraulic cylinder 5 is fixed on the external support frame in a hinged mode.
The random coal dropping device adopts a servo hydraulic cylinder 20 to control the position of a coal baffle plate 24 so as to control the size of an outlet at the bottom of a coal storage bin 23, the coal storage bin 23 is erected above a scraper chain 16 by a certain height to simulate the height drop between a coal cutter and a scraper in actual working conditions, the servo hydraulic cylinder 20 is fixed on an external support plate, a controller random displacement signal is given in a real-time control system, the controller random displacement signal is converted into an analog signal through a PCI-6208 board card, and the analog signal is transmitted to a conditioning module and then is used for controlling a servo valve to adjust the rod outlet length of the servo hydraulic cylinder 20, so that the position of the coal baffle plate 24 is controlled to control the size of the outlet at the bottom of the coal storage bin 23. The design of the coal baffle plate 24 at the bottom of the coal storage bin 23 is smaller than the size of an outlet, so that a certain coal block is ensured to fall all the time in the random coal falling device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (6)

1. The utility model provides a mining scraper conveyor chain tension control test system of heavy load which characterized in that: comprises a random coal dropping device (9), a tail load force adjusting device and a chain tension adjusting device;
the random coal dropping device (9) comprises a coal dropping bin (23), an opening at the bottom of the coal dropping bin (23) faces to a chain (16) of the scraper conveyor and is connected with a coal baffle plate (24) capable of being covered in a sliding mode, the coal baffle plate (24) is connected with a piston rod of a servo hydraulic cylinder (20), the servo hydraulic cylinder (20) controls the size of the opening at the bottom of the coal dropping bin (23) through the coal baffle plate (24), and the interference of the control of the coal dropping quantity on the chain tension is realized;
the chain tension adjusting device comprises a telescopic tail (8) which is connected to the tail of the scraper conveyor in a sliding mode and a tensioning hydraulic cylinder (2) which is used for controlling the telescopic tail (8) to slide back and forth, a chain wheel (7) at the rear end of the scraper conveyor is arranged on the telescopic tail (8), and the tensioning hydraulic cylinder (2) controls the chain wheel (7) to move back and forth through the telescopic tail (8) so as to control the tensioning degree of the scraper chain;
the tail load force adjusting device comprises a load hydraulic cylinder (5) which is longitudinally arranged, the extending end of the load hydraulic cylinder (5) is connected with a telescopic tail (8), the load hydraulic cylinder (5) can provide different load forces to the telescopic tail (8) and the scraper tail to balance the gravity of the tail, and the influence of the friction force of the tail in chain tension is compensated.
2. The tension control test system for the scraper conveyor chain for heavy-duty mines of claim 1, wherein: still including the random coal breakage control system who is used for controlling servo pneumatic cylinder (20) piston rod protrusion volume, random coal breakage control system is including establishing first displacement sensor (21) that is used for monitoring its piston rod extension length on servo pneumatic cylinder (20) and the first pressure sensor of its pneumatic cylinder pressure of monitoring, be connected with between the piston rod of servo pneumatic cylinder (20) and fender coal board (24) and draw pressure sensor (22), servo pneumatic cylinder (20), first displacement sensor (21), first pressure sensor, first draw pressure sensor (22) electric connection controller respectively.
3. The tension control test system for the scraper conveyor chain for heavy-duty mines according to claim 2, characterized in that: the tail load force control system is used for controlling the extension of a piston rod of the load hydraulic cylinder (5);
the tail load force control system comprises a second displacement sensor (19) and a second pressure sensor (4), wherein the second displacement sensor (19) is arranged on a load hydraulic cylinder (5) and used for monitoring the extension length of a piston rod of the load hydraulic cylinder, the second pressure sensor (4) is used for monitoring the pressure of the hydraulic cylinder of the load hydraulic cylinder, a second pull pressure sensor (3) is connected between the piston rod of the load hydraulic cylinder (5) and the tail of the scraper conveyor, and the load hydraulic cylinder, the second displacement sensor (19), the second pressure sensor (4) and the second pull pressure sensor (3) are respectively electrically connected with a controller.
4. The tension control test system for the scraper conveyor chain for heavy-duty mines according to claim 3, characterized in that: the chain tension control system is used for controlling the extension of a piston rod of the tensioning hydraulic cylinder (2);
chain tension control system is including establishing third displacement sensor (11) that are used for monitoring its piston rod extension length on tensioning pneumatic cylinder (2) and monitoring third pressure sensor (1) of its pneumatic cylinder pressure, be connected with the third between the piston rod of tensioning pneumatic cylinder (2) and flexible tail (8) and draw pressure sensor (6), tensioning pneumatic cylinder (2), third displacement sensor (11), third pressure sensor (1), third draw pressure sensor (6) electric connection controller respectively.
5. The tension control test system for the scraper conveyor chain for heavy-duty mines according to claim 4, characterized in that: a chain wheel (7) on the telescopic tail (8) is provided with a scraper chain strain gauge on a chain (16) meshed with the chain wheel for monitoring the tension distribution condition of the whole scraper chain in real time; and the chain tension signal acquired by the scraper chain strain gauge is transmitted to the controller in a wireless transmission mode.
6. The use method of the tension control test system for the scraper conveyor chain for heavy-duty mines according to claim 5, characterized by comprising the following steps:
s1, setting a chain tension reference value in a controller, collecting an integral tension signal of a scraper chain by a third pull pressure sensor (6) and synchronously sending the signal to the controller, and controlling the length of a piston rod of a tensioning hydraulic cylinder (2) to enter and exit by the controller to realize tension control of the scraper chain;
s2, setting a pressure value of the loader tail in the controller, acquiring a pressure signal between the loader tail and the load hydraulic cylinder (5) by the second pull pressure sensor (3), synchronously sending the pressure signal to the controller, and controlling the length of a piston rod of the load hydraulic cylinder (5) to enter and exit by the controller to realize the gravity control of the simulator tail;
and S3, giving a random signal to the controller, controlling the length of a piston rod of the servo hydraulic cylinder (20) to enter and exit randomly by the controller, and controlling the bottom opening of the coal storage bin (23) to smile through the coal baffle plate (24) to realize random coal dropping so as to achieve random coal dropping impact on the scraper chain.
CN202211012088.XA 2022-08-23 2022-08-23 Heavy-load mining scraper conveyor chain tension control test system and method Pending CN115367417A (en)

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Application Number Priority Date Filing Date Title
CN202211012088.XA CN115367417A (en) 2022-08-23 2022-08-23 Heavy-load mining scraper conveyor chain tension control test system and method

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Application Number Priority Date Filing Date Title
CN202211012088.XA CN115367417A (en) 2022-08-23 2022-08-23 Heavy-load mining scraper conveyor chain tension control test system and method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117228227A (en) * 2023-09-11 2023-12-15 中国矿业大学 Intelligent monitoring and chain-feeding device of heavy mining scraper conveyor and control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117228227A (en) * 2023-09-11 2023-12-15 中国矿业大学 Intelligent monitoring and chain-feeding device of heavy mining scraper conveyor and control method
CN117228227B (en) * 2023-09-11 2024-04-02 中国矿业大学 Intelligent monitoring and chain-feeding device of heavy mining scraper conveyor and control method

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