An automatic tensioning device and method for scraper conveyor chains in underground coal mines

Abstract

The present invention provides an automatic tensioning device and a tensioning method for a scraper chain in a coal mine underground, which relates to the technical field of chain tensioning. The automatic tensioning device for a scraper chain in a coal mine underground includes a scraper body, and a scraper chain is arranged inside the scraper body. The device further includes: a fixing plate, which is fixedly installed inside the scraper body; a distance measuring component, which is used for measuring the distance between the scraper chain and the fixing plate; a moving component, which is arranged inside the scraper chain and is used for providing power for moving perpendicular to the moving direction of the scraper chain. The moving component includes a telescopic device fixedly installed on the fixing plate, and the output end of the telescopic device is fixedly connected with a moving frame. By providing the moving component, the transverse component and the longitudinal component, restrictions parallel and perpendicular to the moving direction of the scraper chain are provided for the scraper chain, thereby preventing the scraper chain from falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of chain tensioning, and in particular to an automatic chain tensioning device and a tensioning method for a scraper conveyor in a coal mine underground Background Art

[0002] The scraper conveyor in a coal mine underground is an important device among the coal mine underground transportation equipment. It usually includes: a scraper conveyor head, a scraper conveyor tail, a scraper conveyor body, and a scraper conveyor chain. Due to long-term use and load, the scraper conveyor chain will become loose. The loose chain will come into contact and friction with other components, resulting in damage to the components, increasing the maintenance cost, and seriously deviating from the preset track to cause damage to the scraper conveyor. Therefore, it is necessary to carry out tensioning operations on the chain and a tensioning device is required

[0003] In related technologies, such as an automatic chain tensioning device for a scraper conveyor in a coal mine underground with the publication number of: CN116022516B, it uses the movement of a transmission spur gear to provide tension for the chain

[0004] However, during the movement of the chain, especially a loose chain, it is prone to lateral movement. The traditional tensioning device cannot provide lateral restriction, so the tensioning effect is not good Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automatic chain tensioning device for a scraper conveyor in a coal mine underground, which solves the problem that the traditional tensioning device cannot provide lateral restriction for the chain, resulting in poor chain tensioning effect

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: an automatic chain tensioning device for a scraper conveyor in a coal mine underground, including a scraper conveyor body, in which a scraper conveyor chain is provided, and further includes:

[0007] A fixed plate, which is fixedly installed inside the scraper conveyor body

[0008] A ranging component, which is used to measure the distance between the scraper conveyor chain and the fixed plate

[0009] A moving component, which is arranged inside the scraper conveyor chain and is used to provide power for moving perpendicular to the movement direction of the scraper conveyor chain

[0010] The moving component includes a telescopic device fixedly installed on the fixed plate, the output end of the telescopic device is fixedly connected with a moving frame, and the lower part of the moving frame is fixedly connected with an extension frame

[0011] A lateral component, which is arranged at the lower part of the moving frame and is used to provide a restriction perpendicular to the movement direction of the scraper conveyor chain for the scraper conveyor chain

[0012] A lubricating assembly, which is arranged on the upper part of the moving frame and is used to apply lubricating oil to the scraper conveyor chain;

[0013] A longitudinal assembly, which is arranged on the extension frame and is used to provide a restriction parallel to the movement direction of the scraper conveyor chain for the scraper conveyor chain, receive the dripping lubricating oil, and use the lubricating oil to apply lubricating oil to the scraper conveyor chain. By providing the moving assembly, the transverse assembly, and the longitudinal assembly, it is possible to provide restrictions parallel and perpendicular to the movement direction of the scraper conveyor chain for the scraper conveyor chain, thereby preventing the scraper conveyor chain from falling and ensuring good tensioning effect of the scraper conveyor chain.

[0014] Preferably, the distance measuring assembly includes a protection frame and an infrared distance sensor fixedly installed on the fixed plate. There are two protection frames, and the infrared distance sensor is located between the two protection frames.

[0015] Preferably, the moving assembly further includes a guiding slide rail fixedly installed on the fixed plate. A slider is fixedly connected to the side surface of the moving frame, and the slider is slidably matched with the guiding slide rail. There are two guiding slide rails.

[0016] Preferably, the transverse assembly includes a cross bar fixedly installed on the moving frame. A fixed wheel is rotatably connected to the middle of the cross bar. Elastic washers and adjusting wheels are symmetrically sleeved on the cross bar. The adjusting wheels are located outside the elastic washers. An adjusting nut is threadedly connected to the end of the cross bar, and the adjusting nut is located outside the adjusting wheel. A conical part and an edge part are provided at one end of the adjusting wheel close to the fixed wheel.

[0017] Preferably, the lubricating assembly includes a main housing. A filling pipe is fixedly connected to the main housing. A secondary housing is fixedly connected to the end of the main housing. A main lubricating column and a secondary lubricating column are respectively rotatably connected to the lower parts of the main housing and the secondary housing. Accommodating grooves are provided on the circumferential surfaces of the main lubricating column and the secondary lubricating column. Sealing gaskets are provided between the main housing and the main lubricating column and between the secondary housing and the secondary lubricating column.

[0018] Preferably, the longitudinal assembly includes a connecting shaft fixedly installed on the extension frame. A vertical column is rotatably connected to the connecting shaft. A receiving shell is rotatably connected to the lower end of the connecting shaft. A receiving edge is fixedly connected to the upper part of the receiving shell. A receiving inclined surface inclined inward is provided on the receiving edge. A supporting column body is rotatably installed inside the receiving shell, and the supporting column bodies are arranged circumferentially and uniformly.

[0019] Preferably, a scraper motor, a driving shaft, and a driven shaft are installed on the scraper body. A driving sprocket is fixedly connected to the driving shaft. A driven sprocket is fixedly connected to the driven shaft. The scraper conveyor chain is arranged between the driving sprocket and the driven sprocket.

[0020] The present invention also provides an automatic chain tensioning method for a scraper conveyor in a coal mine. Using the above automatic chain tensioning device for a scraper conveyor in a coal mine, it includes the following steps:

[0021] Step 1: Use the distance measuring component to measure the distance between the scraper conveyor chain and the fixed plate, and judge whether the scraper conveyor chain is in a loose state through the distance value;

[0022] Step 2: Use the moving component to drive the transverse component, longitudinal component and lubricating component to move perpendicular to the movement direction of the scraper conveyor chain. The transverse component provides a restriction perpendicular to the movement direction of the scraper conveyor chain for the scraper conveyor chain, and the longitudinal component provides a restriction parallel to the movement direction of the scraper conveyor chain for the scraper conveyor chain and receives the dripping lubricating oil and uses the lubricating oil to apply lubricating oil to the scraper conveyor chain to tension the scraper conveyor chain;

[0023] Step 3: Use the lubricating component to apply lubricating oil to the scraper conveyor chain.

[0024] The present invention provides an automatic chain tensioning device and a tensioning method for a scraper conveyor in a coal mine. It has the following beneficial effects:

[0025] 1. Through the arranged moving component, transverse component and longitudinal component, the present invention can provide restrictions parallel and perpendicular to the movement direction of the scraper conveyor chain for the scraper conveyor chain, thereby preventing the scraper conveyor chain from falling and ensuring good tensioning effect of the scraper conveyor chain.

[0026] 2. Through the arranged lubricating component, the present invention can automatically perform the operation of applying lubricating oil through the movement of the scraper conveyor chain, which is suitable for the working environment in a coal mine and improves the overall service life of the scraper conveyor.

[0027] 3. The overall structure of the present invention is compact, occupies a small space, shortens the maintenance time, and increases the service time of the scraper conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0029] Figure 2 is a three-dimensional schematic diagram inside the scraper conveyor body of the present invention;

[0030] Figure 3 is of the present invention Figure 2 front view;

[0031] Figure 4 is a three-dimensional schematic diagram of the moving component, transverse component and lubricating component of the present invention;

[0032] Figure 5 is of the present invention Figure 4 side view;

[0033] Figure 6 A three-dimensional schematic diagram of the moving component and the longitudinal component of the present invention;

[0034] Figure 7 A three-dimensional schematic diagram of the longitudinal component of the present invention;

[0035] Figure 8 A three-dimensional schematic diagram of the transverse component of the present invention;

[0036] Figure 9 A three-dimensional schematic diagram of the transverse component and the lubricating component of the present invention;

[0037] Figure 10 A disassembled three-dimensional view of the transverse component of the present invention;

[0038] Figure 11 A three-dimensional view of the lubricating component of the present invention;

[0039] Figure 12 A cross-sectional view of the lubricating component of the present invention.

[0040] Among them, 1, scraper body; 2, scraper motor; 201, driving shaft; 202, driving sprocket; 203, driven shaft; 204, driven sprocket; 3, scraper chain; 401, protection frame; 402, infrared distance sensor; 403, fixing plate; 404, guiding slide rail; 405, telescopic device; 6, moving component; 7, transverse component; 8, lubricating component; 9, longitudinal component; 601, moving frame; 602, slider; 603, extension frame; 701, cross bar; 702, adjusting nut; 703, adjusting wheel; 7031, conical part; 7032, edge part; 704, elastic washer; 705, fixed wheel; 801, main housing; 802, adding pipe; 803, auxiliary housing; 804, auxiliary lubricating column; 805, main lubricating column; 806, gasket; 807, accommodating groove; 901, receiving shell; 902, receiving edge; 9021, receiving inclined plane; 903, supporting column body; 904, vertical column; 905, connecting shaft. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] As Figures 1 - 12As shown in the figure, an embodiment of the present invention provides an automatic tensioning device for a scraper chain in a coal mine underground, which includes a scraper body 1. A scraper chain 3 is arranged inside the scraper body 1. A scraper motor 2, a driving shaft 201, and a driven shaft 203 are installed on the scraper body 1. A driving sprocket 202 is fixedly connected to the driving shaft 201, and a driven sprocket 204 is fixedly connected to the driven shaft 203. The scraper chain 3 is arranged between the driving sprocket 202 and the driven sprocket 204;

[0043] Reference Figure 1 、 Figure 2 , the scraper is an existing device. When it works, the scraper motor 2 works under the action of an external power supply and a controller, drives the driving shaft 201 to rotate through a speed reducer, thereby driving the driving sprocket 202 to rotate. The driving sprocket 202 and the driven sprocket 204 drive the scraper chain 3 to move, and the scraper chain 3 drives the scraper (not shown) thereon to move, and the scraper pushes the material to move, so as to complete the material transportation in the coal mine underground.

[0044] It further includes:

[0045] A fixing plate 403, which is fixedly installed on the inner side of the scraper body 1;

[0046] Reference Figure 2 , the fixing plate 403 is used to provide an installation position for other components.

[0047] A distance measuring component, which is used to measure the distance between the scraper chain 3 and the fixing plate 403;

[0048] The distance measuring component includes a protection frame 401 fixedly installed on the fixing plate 403 and an infrared distance sensor 402. The number of the protection frames 401 is two, and the infrared distance sensor 402 is located between the two protection frames 401;

[0049] Reference Figure 2 、 Figure 3, during the ranging operation, there are at least two infrared distance sensors 402, one above and one below. The infrared distance sensors 402 cooperate with the peripheral single-chip microcomputer to measure the distances between the two sides of the scraper conveyor chain 3 and the fixing plate 403. The upper infrared distance sensor 402 is used to measure the distance between the upper side of the scraper conveyor chain 3 and the fixing plate 403. Due to the action of gravity, the loose scraper conveyor chain 3 will move downward. Therefore, the smaller the value of the distance between the upper side of the scraper conveyor chain 3 and the fixing plate 403, the looser the scraper conveyor chain 3. The lower infrared distance sensor 402 is used to measure the distance between the lower side of the scraper conveyor chain 3 and the fixing plate 403. Due to the action of gravity, the loose scraper conveyor chain 3 will move downward. Therefore, the larger the value of the distance between the lower side of the scraper conveyor chain 3 and the fixing plate 403, the looser the scraper conveyor chain 3. The two data can accurately determine whether the scraper conveyor chain 3 is loose, and the two groups of data can be compared with each other to improve the accuracy of the judgment.

[0050] The moving component 6 is arranged inside the scraper conveyor chain 3 and is used to provide the power for moving perpendicular to the moving direction of the scraper conveyor chain 3;

[0051] The moving component 6 includes a telescopic device 405 fixedly installed on the fixing plate 403. The output end of the telescopic device 405 is fixedly connected with a moving frame 601, and the lower part of the moving frame 601 is fixedly connected with an extension frame 603;

[0052] Reference Figure 4 , Figure 5 , during the moving operation, the telescopic device 405 can be an electric push rod or a hydraulic cylinder. When the telescopic device 405 works, its telescopic end can drive the moving frame 601 and the extension frame 603 to move synchronously, thereby driving the transverse component 7, the longitudinal component 9, and the lubricating component 8 to move, so as to drive the scraper conveyor chain 3 to move towards the fixing plate 403 and make the scraper conveyor chain 3 in a tensioned state.

[0053] The moving component 6 further includes a guiding slide rail 404 fixedly installed on the fixing plate 403. A slider 602 is fixedly connected to the side of the moving frame 601, and the slider 602 is slidably matched with the guiding slide rail 404. The number of guiding slide rails 404 is two;

[0054] Reference Figure 7 , the slider 602 can move on the guiding slide rail 404 to ensure the stable movement of the moving frame 601.

[0055] The transverse component 7 is arranged below the moving frame 601 and is used to provide a restriction perpendicular to the moving direction of the scraper conveyor chain 3 for the scraper conveyor chain 3;

[0056] The horizontal component 7 includes a cross bar 701 fixedly installed on the moving frame 601. A fixed wheel 705 is rotatably connected to the middle of the cross bar 701. Elastic washers 704 and adjusting wheels 703 are symmetrically sleeved on the cross bar 701. The adjusting wheels 703 are located outside the elastic washers 704. An adjusting nut 702 is threadedly connected to the end of the cross bar 701. The adjusting nut 702 is located outside the adjusting wheel 703. One end of the adjusting wheel 703 close to the fixed wheel 705 is provided with a conical part 7031 and an edge part 7032;

[0057] Reference Figure 5 、 Figure 6 、 Figure 8 、 Figure 10 When restricting the operation, both the fixed wheel 705 and the adjusting wheel 703 are in contact with the scraper conveyor chain 3, and can provide a restriction perpendicular to the movement direction of the scraper conveyor chain 3 for the scraper conveyor chain 3. The elastic washer 704 can provide elastic support for the adjusting wheel 703 and can adjust the position of the adjusting wheel 703. When the adjusting nut 702 is tightened, the distance between the adjusting wheel 703 and the fixed wheel 705 becomes smaller. When the adjusting nut 702 is loosened, under the elastic force of the elastic washer 704, the distance between the adjusting wheel 703 and the fixed wheel 705 becomes larger, so as to fit scraper conveyor chains 3 of different widths; since one end of the adjusting wheel 703 close to the fixed wheel 705 is provided with a conical part 7031 and an edge part 7032, the conical part 7031 can provide a thrust force for the scraper conveyor chain 3 in the direction towards the fixed wheel 705, so as to horizontally restrict the scraper conveyor chain 3, and the edge part 7032 can be in contact with the edge part of the scraper conveyor chain 3, which is convenient for applying lubricating liquid.

[0058] The lubricating component 8 is arranged on the upper part of the moving frame 601 and is used for applying lubricating oil to the scraper conveyor chain 3;

[0059] The lubricating component 8 includes a main housing 801. A filling pipe 802 is fixedly connected to the main housing 801. A secondary housing 803 is fixedly connected to the end of the main housing 801. A main lubricating column 805 and a secondary lubricating column 804 are respectively rotatably connected to the lower parts of the main housing 801 and the secondary housing 803. Accommodating grooves 807 are provided on the circumferential surfaces of the main lubricating column 805 and the secondary lubricating column 804. Sealing gaskets 806 are provided between the main housing 801 and the main lubricating column 805 and between the secondary housing 803 and the secondary lubricating column 804;

[0060] Reference Figure 9 、 Figure 11 、 Figure 12, during the lubrication operation, lubricating oil can be added into the main housing 801 and the auxiliary housing 803 through the adding pipe 802. Due to the design of the gasket 806, when the main lubricating column 805 and the auxiliary lubricating column 804 do not rotate, the lubricating oil will not drop. Since the scraper conveyor chain 3 is in contact with the adjusting wheel 703 and the fixed wheel 705, the adjusting wheel 703 and the fixed wheel 705 will be driven by the scraper conveyor chain 3 to rotate. Since the main lubricating column 805 and the auxiliary lubricating column 804 are in contact with the adjusting wheel 703 and the fixed wheel 705, under the action of friction, the main lubricating column 805 and the auxiliary lubricating column 804 will rotate. When the main lubricating column 805 and the auxiliary lubricating column 804 rotate, the lubricating oil in the receiving groove 807 will fall onto the main lubricating column 805 and the auxiliary lubricating column 804, and then fall onto the adjusting wheel 703 and the fixed wheel 705, so that the lubricating oil is smeared on the scraper conveyor chain 3.

[0061] The longitudinal component 9 is arranged on the extension frame 603 and is used to provide a limit parallel to the movement direction of the scraper conveyor chain 3 for the scraper conveyor chain 3, receive the dripping lubricating oil, and use the lubricating oil to smear the lubricating oil on the scraper conveyor chain 3;

[0062] The longitudinal component 9 includes a connecting shaft 905 fixedly installed on the extension frame 603. A vertical column 904 is rotatably connected to the connecting shaft 905. The lower end of the connecting shaft 905 is rotatably connected to a receiving shell 901. The upper part of the receiving shell 901 is fixedly connected with a receiving edge 902. A receiving inclined surface 9021 inclined inward is arranged on the receiving edge 902. A supporting column body 903 is rotatably installed inside the receiving shell 901, and the supporting column bodies 903 are arranged circumferentially and uniformly;

[0063] Reference Figure 7 、 Figure 6 、 Figure 5 , during the limiting operation, the circumferential surface of the vertical column 904 is in contact with the side surface of the scraper conveyor chain 3. Therefore, a limit will be provided to the side surface of the scraper conveyor chain 3. The circumferential surface of the supporting column body 903 will provide support and limit to the lower surface of the scraper conveyor chain 3. Therefore, the scraper conveyor chain 3 will not move downward. Since the radius of the receiving edge 902 is larger than that of the receiving shell 901, the receiving edge 902 can receive the lubricating oil dropped by the scraper conveyor chain 3. The lubricating oil will fall into the receiving shell 901 along the receiving inclined surface 9021, thus avoiding waste of the lubricating oil. At the same time, due to the rotation of the supporting column body 903, lubricating oil will adhere to the circumferential surface of the supporting column body 903, so that the lubricating oil adheres to the lower surface of the scraper conveyor chain 3, playing a lubricating role.

[0064] This embodiment also provides a method for automatically tensioning a scraper conveyor chain in a coal mine underground. Using the above-mentioned automatic tensioning device for a scraper conveyor chain in a coal mine underground, it includes the following steps:

[0065] Step 1: Use the distance measuring component to measure the distance between the scraper conveyor chain 3 and the fixed plate 403, and judge whether the scraper conveyor chain 3 is in a loose state based on the distance value.

[0066] Specifically, during the distance measurement operation, there are at least two upper and lower infrared distance sensors 402 for measuring the distances between the two sides of the scraper conveyor chain 3 and the fixed plate 403. The upper infrared distance sensor 402 is used to measure the distance between the upper side of the scraper conveyor chain 3 and the fixed plate 403, and the lower infrared distance sensor 402 is used to measure the distance between the lower side of the scraper conveyor chain 3 and the fixed plate 403. When the distance value reaches the preset value, it can be judged that the scraper conveyor chain 3 is in a loose state. Among them, the preset value is set artificially. For example, the upper preset value is 5 cm and the lower preset value is 10 cm.

[0067] Step 2: Use the moving component 6 to drive the transverse component 7, the longitudinal component 9, and the lubricating component 8 to move perpendicular to the moving direction of the scraper conveyor chain 3. The transverse component 7 provides a restriction perpendicular to the moving direction of the scraper conveyor chain 3 for the scraper conveyor chain 3, and the longitudinal component 9 provides a restriction parallel to the moving direction of the scraper conveyor chain 3 for the scraper conveyor chain 3 and receives the dripping lubricating oil and uses the lubricating oil to apply lubricating oil to the scraper conveyor chain 3 to tension the scraper conveyor chain 3.

[0068] Specifically, the telescopic end of the telescopic device 405 can drive the moving frame 601 and the extension frame 603 to move synchronously, thereby driving the transverse component 7, the longitudinal component 9, and the lubricating component 8 to move, so as to drive the scraper conveyor chain 3 to move towards the fixed plate 403 and make the scraper conveyor chain 3 in a tensioned state.

[0069] Both the fixed wheel 705 and the adjusting wheel 703 are in contact with the scraper conveyor chain 3 and can provide a restriction perpendicular to the moving direction of the scraper conveyor chain 3 for the scraper conveyor chain 3.

[0070] The circumferential surface of the vertical column 904 is in contact with the side surface of the scraper conveyor chain 3. Therefore, it will provide a restriction on the side surface of the scraper conveyor chain 3, and the circumferential surface of the support column 903 will provide support and restriction on the lower surface of the scraper conveyor chain 3. Therefore, the scraper conveyor chain 3 will not move downward; since the radius of the receiving edge 902 is greater than that of the receiving shell 901, the receiving edge 902 can receive the lubricating oil dropped by the scraper conveyor chain 3, and the lubricating oil will fall into the receiving shell 901 along the receiving inclined surface 9021, thus avoiding waste of lubricating oil. At the same time, due to the rotation of the support column 903, lubricating oil will adhere to the circumferential surface of the support column 903, so that the lubricating oil adheres to the lower surface of the scraper conveyor chain 3, playing a lubricating role.

[0071] Step 3: Use the lubricating component 8 to apply lubricating oil to the scraper conveyor chain 3.

[0072] Specifically: lubricating oil can be added into the main housing 801 and the auxiliary housing 803 through the addition of the pipe 802. Due to the design of the gasket 806, the lubricating oil will not fall when the main lubricating column 805 and the auxiliary lubricating column 804 do not rotate. Since the scraper chain 3 is in contact with the adjusting wheel 703 and the fixed wheel 705, the adjusting wheel 703 and the fixed wheel 705 will be driven by the scraper chain 3 to rotate. Since the main lubricating column 805 and the auxiliary lubricating column 804 are in contact with the adjusting wheel 703 and the fixed wheel 705, under the action of friction, the main lubricating column 805 and the auxiliary lubricating column 804 will rotate. When the main lubricating column 805 and the auxiliary lubricating column 804 rotate, the lubricating oil in the receiving groove 807 will fall onto the main lubricating column 805 and the auxiliary lubricating column 804, and then onto the adjusting wheel 703 and the fixed wheel 705, so that the lubricating oil is applied to the scraper chain 3.

[0073] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic tensioning device for the scraper chain in a coal mine underground, comprising a scraper body (1), wherein a scraper chain (3) is arranged inside the scraper body (1), and it is characterized in that, Further included are: A fixed plate (403) fixedly installed inside the scraper body (1); A ranging component for measuring the distance between the scraper chain (3) and the fixed plate (403); A moving component (6) arranged inside the scraper chain (3) for providing power to move perpendicular to the moving direction of the scraper chain (3); The moving component (6) includes a telescopic device (405) fixedly installed on the fixed plate (403), the output end of the telescopic device (405) is fixedly connected to a moving frame (601), and a lower part of the moving frame (601) is fixedly connected to an extension frame (603); A transverse component (7) arranged at the lower part of the moving frame (601) for providing a restriction perpendicular to the moving direction of the scraper chain (3) to the scraper chain (3); A lubricating component (8) arranged at the upper part of the moving frame (601) for applying lubricating oil to the scraper chain (3); A longitudinal component (9) arranged on the extension frame (603) for providing a restriction parallel to the moving direction of the scraper chain (3) to the scraper chain (3), receiving the dripping lubricating oil, and using the lubricating oil to apply lubricating oil to the scraper chain (3); The longitudinal component (9) includes a connecting shaft (905) fixedly installed on the extension frame (603), a vertical column (904) rotatably connected to the connecting shaft (905), a receiving shell (901) rotatably connected to a lower end of the connecting shaft (905), a receiving edge (902) fixedly connected to an upper part of the receiving shell (901), a receiving inclined surface (9021) inclined inwardly arranged on the receiving edge (902), and a support column body (903) rotatably installed inside the receiving shell (901), and the support column bodies (903) are uniformly arranged in a circumferential manner.

2. The automatic tensioning device for the scraper chain in the coal mine as claimed in claim 1, wherein: The ranging component includes a protection frame (401) fixedly installed on the fixed plate (403) and an infrared distance sensor (402), there are two protection frames (401), and the infrared distance sensor (402) is located between the two protection frames (401).

3. An automatic tensioning device for a scraper chain in a coal mine according to claim 1, characterized in that: The moving component (6) further includes a guiding slide rail (404) fixedly installed on the fixed plate (403), a slider (602) fixedly connected to a side surface of the moving frame (601), the slider (602) is in sliding fit with the guiding slide rail (404), and there are two guiding slide rails (404).

4. An automatic tensioning device for a scraper chain in a coal mine shaft according to claim 1, characterized in that: The transverse component (7) includes a cross bar (701) fixedly mounted on the moving frame (601). A fixed wheel (705) is rotatably connected to the middle of the cross bar (701). Elastic washers (704) and adjusting wheels (703) are symmetrically sleeved on the cross bar (701). The adjusting wheels (703) are located outside the elastic washers (704). An adjusting nut (702) is threadedly connected to the end of the cross bar (701). The adjusting nut (702) is located outside the adjusting wheel (703). A conical part (7031) and an edge part (7032) are provided at one end of the adjusting wheel (703) close to the fixed wheel (705).

5. An automatic tensioning device for a scraper chain in a coal mine, as described in claim 1, characterized in that: The lubricating component (8) includes a main housing (801). A filling pipe (802) is fixedly connected to the main housing (801). A secondary housing (803) is fixedly connected to the end of the main housing (801). A main lubricating column (805) and a secondary lubricating column (804) are respectively rotatably connected to the lower parts of the main housing (801) and the secondary housing (803). Accommodating grooves (807) are provided on the circumferential surfaces of the main lubricating column (805) and the secondary lubricating column (804). Gaskets (806) are provided between the main housing (801) and the main lubricating column (805) and between the secondary housing (803) and the secondary lubricating column (804).

6. The automatic tensioning device for the scraper chain in the coal mine shaft according to claim 1, characterized in that: A scraper motor (2), a driving shaft (201), and a driven shaft (203) are installed on the scraper body (1). A driving sprocket (202) is fixedly connected to the driving shaft (201). A driven sprocket (204) is fixedly connected to the driven shaft (203). A scraper chain (3) is arranged between the driving sprocket (202) and the driven sprocket (204).

7. An automatic tensioning method for the scraper chain in a coal mine underground, which uses an automatic tensioning device for the scraper chain in a coal mine underground as described in any one of claims 1-6, characterized in that, It includes the following steps: Step 1: Use the distance measuring component to measure the distance between the scraper chain (3) and the fixing plate (403), and judge whether the scraper chain (3) is in a loose state according to the distance value; Step 2: Use the moving component (6) to drive the transverse component (7), the longitudinal component (9), and the lubricating component (8) to move perpendicular to the moving direction of the scraper chain (3). The transverse component (7) provides a restriction perpendicular to the moving direction of the scraper chain (3) for the scraper chain (3). The longitudinal component (9) provides a restriction parallel to the moving direction of the scraper chain (3) for the scraper chain (3) and receives the dripping lubricating oil and uses the lubricating oil to apply lubricating oil to the scraper chain (3) to make the scraper chain (3) taut; Step 3: Use the lubricating component (8) to apply lubricating oil to the scraper chain (3).

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