Automatic tensioning device and tensioning method for chain of underground coal mine scraper conveyor

Abstract

The invention provides an automatic tensioning device and method for a chain of an underground coal mine scraper conveyor, and relates to the technical field of chain tensioning. The automatic tensioning device for the chain of the underground coal mine scraper conveyor comprises a scraper conveyor body, the scraper conveyor chain is arranged in the scraper conveyor body, and the automatic tensioning device further comprises a fixing plate and a tensioning device, and the fixing plate is fixedly installed on the inner side of the scraper conveyor body; the distance measuring assembly is used for measuring the distance between the scraper chain and the fixing plate; the moving assembly is arranged on the inner side of the scraper chain and used for providing power for moving in the direction perpendicular to the moving direction of the scraper chain; the moving assembly comprises 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 arranging the moving assembly, the transverse assembly and the longitudinal assembly, the scraper chain is limited in the direction parallel to and perpendicular to the movement direction of the scraper chain, and therefore the scraper chain is prevented from falling off.

Description

Technical Field

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

[0002] The scraper in coal mines is an important equipment in underground transportation equipment of coal mines. It usually includes: scraper head, scraper tail, scraper body, and scraper chain. Due to long-term use and load, the scraper chain will become loose. The loose chain will contact and rub with other parts, causing damage to parts and increasing maintenance costs. Severe deviation from the preset trajectory will cause damage to the scraper. Therefore, the chain needs to be tensioned, and a tensioning device needs to be used.

[0003] In the related art, there is an automatic chain tensioning device for a scraper in an underground coal mine with the announcement number CN116022516B, which uses the movement of a transmission spur gear to provide tensioning force to the chain.

[0004] However, when the chain is moving, especially a loose chain, it is easy to move in the lateral direction. The traditional tensioning device cannot provide lateral restriction, so the tensioning effect is not good. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an automatic chain tensioning device for a scraper conveyor in an underground coal mine, 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 implemented through the following technical solutions: an automatic tensioning device for a scraper chain in an underground coal mine, comprising a scraper body, a scraper chain is arranged in the scraper body, and further comprising: A fixing plate, the fixing plate being fixedly mounted on the inner side of the scraper body; A distance measuring component, wherein the distance measuring component is used to measure the distance between the scraper chain and the fixed plate; A moving assembly, which is arranged on the inner side of the scraper chain and is used to provide power for moving perpendicular to the moving direction of the scraper chain; The mobile assembly includes a telescopic device fixedly mounted on a fixed plate, an output end of the telescopic device is fixedly connected to a mobile frame, and a lower portion of the mobile frame is fixedly connected to an extension frame; A transverse assembly, which is arranged at the lower part of the moving frame and is used to provide a restriction for the scraper chain perpendicular to the moving direction of the scraper chain; A lubrication assembly, which is arranged on the upper part of the moving frame and is used to apply lubricating oil to the scraper chain; The longitudinal component is arranged on the extension frame, and is used to provide the scraper chain with restrictions parallel to the moving direction of the scraper chain and receive the dripping lubricating oil and use the lubricating oil to apply lubricating oil to the scraper chain. Through the provided moving component, transverse component and longitudinal component, the scraper chain can be restricted in parallel and perpendicular to the moving direction of the scraper chain, thereby preventing the scraper chain from falling and ensuring a good tensioning effect of the scraper chain.

[0007] Preferably, the distance measuring component comprises a protection frame fixedly mounted on a fixing plate and an infrared distance sensor, there are two protection frames, and the infrared distance sensor is located between the two protection frames.

[0008] Preferably, the moving assembly further comprises a guide rail fixedly mounted on the fixed plate, a sliding block is fixedly connected to the side of the moving frame, the sliding block is slidably matched with the guide rail, and the number of the guide rails is two.

[0009] Preferably, the transverse assembly includes a transverse bar fixedly mounted on the mobile frame, the middle portion of the transverse bar being rotatably connected to a fixed wheel, an elastic washer and an adjusting wheel being symmetrically sleeved on the transverse bar, the adjusting wheel being located on the outside of the elastic washer, an adjusting nut being threadedly connected to the end of the transverse bar, the adjusting nut being located on the outside of the adjusting wheel, and a cone portion and an edge portion being provided at one end of the adjusting wheel close to the fixed wheel.

[0010] Preferably, the lubrication assembly includes a main shell, to which an addition tube is fixedly connected, to which an auxiliary shell is fixedly connected at the end of the main shell, and to which a main lubrication column and an auxiliary lubrication column are rotatably connected at the lower parts of the main shell and the auxiliary shell, respectively, and receiving grooves are provided on the circumferential surfaces of the main lubrication column and the auxiliary lubrication column, and sealing gaskets are provided between the main shell and the main lubrication column and between the auxiliary shell and the auxiliary lubrication column.

[0011] Preferably, the longitudinal component includes a connecting shaft fixedly mounted 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 slope inclined inwardly is provided on the receiving edge, a supporting column is rotatably mounted on the inner side of the receiving shell, and the supporting column is evenly arranged around the circumference.

[0012] 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, and the scraper chain is arranged between the driving sprocket and the driven sprocket.

[0013] The present invention also provides a method for automatically tensioning a scraper chain in a coal mine, which adopts the above-mentioned automatic tensioning device for a scraper chain in a coal mine, and comprises the following steps: Step 1: Use the distance measuring component to measure the distance between the scraper chain and the fixed plate, and judge whether the scraper chain is in a loose state according to the distance value; Step 2: Use the moving assembly to drive the transverse assembly, the longitudinal assembly and the lubricating assembly to move perpendicular to the moving direction of the scraper chain. The transverse assembly provides the scraper chain with a restriction perpendicular to the moving direction of the scraper chain. The longitudinal assembly provides the scraper chain with a restriction parallel to the moving direction of the scraper chain and receives the dripping lubricating oil and uses the lubricating oil to apply lubricating oil to the scraper chain, so that the scraper chain is tensioned. Step 3: Use the lubrication assembly to apply lubricating oil to the scraper chain.

[0014] The present invention provides an automatic chain tensioning device and tensioning method for a scraper conveyor in a coal mine, which has the following beneficial effects: 1. The present invention can provide restrictions on the scraper chain parallel and perpendicular to the movement direction of the scraper chain by setting up the moving component, the horizontal component and the longitudinal component, thereby avoiding the scraper chain from falling and ensuring a good tensioning effect of the scraper chain.

[0015] 2. The lubrication assembly provided in the present invention can automatically apply lubricating oil through the movement of the scraper chain, which is suitable for the working environment underground in coal mines and improves the overall service life of the scraper.

[0016] 3. The overall structure of the present invention is compact, occupies a small space, shortens the maintenance time, and increases the service life of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a three-dimensional schematic diagram of the interior of the scraper body of the present invention; Figure 3 For the present invention Figure 2 A front view of Figure 4 It is a three-dimensional schematic diagram of the moving assembly, the lateral assembly and the lubricating assembly of the present invention; Figure 5 For the present invention Figure 4 Side view of Figure 6 It is a three-dimensional schematic diagram of the mobile component and the longitudinal component of the present invention; Figure 7 is a perspective schematic diagram of a longitudinal assembly of the present invention; Figure 8 is a three-dimensional schematic diagram of a transverse assembly of the present invention; Fig. 9 It is a three-dimensional schematic diagram of the transverse assembly and the lubrication assembly of the present invention; Fig.10It is an exploded perspective view of the transverse assembly of the present invention; Fig.11 is a three-dimensional diagram of the lubrication assembly of the present invention; Fig.12 It is a cross-sectional view of the lubrication assembly of the present invention.

[0018] 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. fixed plate; 404. guide rail; 405. telescopic device; 6. moving assembly; 7. horizontal assembly; 8. lubrication assembly; 9. longitudinal assembly; 601. moving frame; 602. slider; 603. extension frame; 701. Cross bar; 702, adjusting nut; 703, adjusting wheel; 7031, cone; 7032, edge; 704, elastic washer; 705, fixing wheel; 801, main shell; 802, adding tube; 803, auxiliary shell; 804, auxiliary lubrication column; 805, main lubrication column; 806, sealing gasket; 807, receiving groove; 901, receiving shell; 902, receiving edge; 9021, receiving slope; 903, supporting column; 904, vertical column; 905, connecting shaft. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 12 As shown, the embodiment of the present invention provides an automatic tensioning device for a scraper chain in an underground coal mine, comprising a scraper body 1, a scraper chain 3 is arranged in 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, a driven sprocket 204 is fixedly connected to the driven shaft 203, and the scraper chain 3 is arranged between the driving sprocket 202 and the driven sprocket 204; refer to Figure 1 , Figure 2 The scraper is an existing device. When it is working, the scraper motor 2 works under the action of the external power supply and the controller, and drives the driving shaft 201 to rotate through the reducer, thereby driving the driving sprocket 202 to rotate, and 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, thereby completing the material transportation in the coal mine.

[0021] Also includes: A fixing plate 403, the fixing plate 403 is fixedly mounted on the inner side of the scraper body 1; refer to Figure 2 The fixing plate 403 is used to provide a mounting position for other components.

[0022] A distance measuring component, which is used to measure the distance between the scraper chain 3 and the fixed plate 403; The distance measuring component includes a protection frame 401 fixedly mounted on a fixing 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. refer to Figure 2 , Figure 3 During the distance measurement operation, the infrared distance sensor 402 has at least two upper and lower infrared distance sensors 402, which cooperate with the external single-chip microcomputer to measure the distance between the two sides of the scraper 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 chain 3 and the fixed plate 403. Due to the effect of gravity, the loose scraper chain 3 will move downward. Therefore, the smaller the distance value between the upper side of the scraper chain 3 and the fixed plate 403, the looser the scraper chain 3 is; the lower infrared distance sensor 402 is used to measure the distance between the lower side of the scraper chain 3 and the fixed plate 403. Due to the effect of gravity, the loose scraper chain 3 will move downward. Therefore, the larger the distance value between the lower side of the scraper chain 3 and the fixed plate 403, the looser the scraper chain 3 is. The two data can accurately determine whether the scraper chain 3 is loose, and the two sets of data can be compared with each other, thereby improving the accuracy of the judgment.

[0023] The moving component 6 is arranged on the inner side of the scraper chain 3 and is used to provide power for moving perpendicular to the moving direction of the scraper chain 3; The moving assembly 6 includes a telescopic device 405 fixedly mounted on a fixed plate 403, an output end of the telescopic device 405 is fixedly connected to a moving frame 601, and a lower portion of the moving frame 601 is fixedly connected to an extension frame 603; refer to 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 is working, its telescopic end can drive the moving frame 601 and the extension frame 603 to move synchronously, thereby driving the horizontal component 7, the longitudinal component 9, and the lubrication component 8 to move, thereby driving the scraper chain 3 to move toward the fixed plate 403, so that the scraper chain 3 is in a tensioned state.

[0024] The moving assembly 6 also includes a guide rail 404 fixedly mounted on the fixed plate 403. A slider 602 is fixedly connected to the side of the moving frame 601. The slider 602 is slidably matched with the guide rail 404. There are two guide rails 404. refer to Figure 7 The slider 602 can move on the guide rail 404 to ensure the stability of the movement of the moving frame 601.

[0025] A transverse component 7, which is disposed at the lower part of the mobile frame 601 and is used to provide a restriction perpendicular to the movement direction of the scraper chain 3 for the scraper chain 3; The transverse assembly 7 includes a transverse bar 701 fixedly mounted on the mobile frame 601, a fixed wheel 705 is rotatably connected to the middle of the transverse bar 701, an elastic washer 704 and an adjusting wheel 703 are symmetrically sleeved on the transverse bar 701, the adjusting wheel 703 is located on the outside of the elastic washer 704, an adjusting nut 702 is threadedly connected to the end of the transverse bar 701, the adjusting nut 702 is located on the outside of the adjusting wheel 703, and a cone portion 7031 and an edge portion 7032 are provided at one end of the adjusting wheel 703 close to the fixed wheel 705; refer to Figure 5 , Figure 6 , Figure 8 , Fig.10 When the limiting operation is performed, the fixed wheel 705 and the adjusting wheel 703 are in contact with the scraper chain 3, which can provide a restriction perpendicular to the movement direction of the scraper chain 3 for the scraper 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, the distance between the adjusting wheel 703 and the fixed wheel 705 becomes larger under the elastic force of the elastic washer 704, so as to be suitable for scraper chains 3 of different widths; because the end of the adjusting wheel 703 close to the fixed wheel 705 is provided with a cone 7031 and an edge 7032, the cone 7031 can provide the scraper chain 3 with a thrust toward the fixed wheel 705, thereby laterally restricting the scraper chain 3, and the edge 7032 can contact with the edge of the scraper chain 3, which is convenient for applying lubricating oil.

[0026] A lubrication assembly 8, which is disposed on the upper portion of the mobile frame 601 and is used to apply lubricating oil to the scraper chain 3; The lubrication assembly 8 comprises a main housing 801, to which a feeding pipe 802 is fixedly connected, to which a sub-housing 803 is fixedly connected at the end of the main housing 801, to which a main lubrication column 805 and a sub-lubrication column 804 are rotatably connected at the lower parts of the main housing 801 and the sub-housing 803, respectively, and on the circumferential surfaces of the main lubrication column 805 and the sub-lubrication column 804, a receiving groove 807 is provided, and a sealing gasket 806 is provided between the main housing 801 and the main lubrication column 805 and between the sub-housing 803 and the sub-lubrication column 804; refer to Fig. 9 , Fig.11 , Fig.12 During lubrication operation, lubricating oil can be added to the main housing 801 and the auxiliary housing 803 through the adding tube 802. Due to the design of the sealing gasket 806, when the main lubricating column 805 and the auxiliary lubricating column 804 do not rotate, the lubricating oil will not fall; 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, the main lubricating column 805 and the auxiliary lubricating column 804 will rotate under the action of friction. 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 on the adjusting wheel 703 and the fixed wheel 705, so that the lubricating oil is smeared on the scraper chain 3.

[0027] A longitudinal component 9, which is arranged on the extension frame 603, is used to provide a restriction parallel to the movement direction of the scraper chain 3 for the scraper chain 3 and to receive the dripping lubricating oil and use the lubricating oil to apply lubricating oil to the scraper chain 3; The longitudinal assembly 9 includes a connecting shaft 905 fixedly mounted on the extension frame 603, a vertical column 904 is rotatably connected to the connecting shaft 905, a receiving shell 901 is rotatably connected to the lower end of the connecting shaft 905, a receiving edge 902 is fixedly connected to the upper part of the receiving shell 901, a receiving inclined surface 9021 inclined inwardly is provided on the receiving edge 902, a supporting column 903 is rotatably mounted on the inner side of the receiving shell 901, and the supporting column 903 is evenly arranged around the circumference; refer to Figure 7 , Figure 6 , Figure 5During the restriction operation, the circumferential surface of the vertical column 904 contacts the side of the scraper chain 3, thereby providing restriction to the side of the scraper chain 3, and the circumferential surface of the supporting column 903 provides support and restriction to the lower surface of the scraper chain 3, so the scraper chain 3 will not move downward; since the radius of the receiving edge 902 is larger than the receiving shell 901, the receiving edge 902 can receive the lubricating oil liquid dropped by the scraper chain 3, and the lubricating oil liquid will fall into the receiving shell 901 along the receiving inclined surface 9021, thereby avoiding the waste of lubricating oil liquid. At the same time, due to the rotation of the supporting column 903, the lubricating oil liquid will adhere to the circumferential surface of the supporting column 903, so that the lubricating oil liquid adheres to the lower surface of the scraper chain 3, which plays a lubricating role.

[0028] This embodiment also provides a method for automatically tensioning a scraper chain in a coal mine, using the above-mentioned automatic tensioning device for a scraper chain in a coal mine, comprising the following steps: Step 1: Use the distance measuring component to measure the distance between the scraper chain 3 and the fixed plate 403, and judge whether the scraper chain 3 is in a loose state according to the distance value; Specifically: during the distance measurement operation, the infrared distance sensor 402 has at least two upper and lower ones, which are used to measure the distance between the two sides of the scraper 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 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 chain 3 and the fixed plate 403. When the distance value reaches the preset value, it can be judged that the scraper chain 3 is in a loose state, wherein the preset value is set manually, such as the upper preset value is 5 cm, and the lower preset value is 10 cm.

[0029] Step 2: Use the moving assembly 6 to drive the transverse assembly 7, the longitudinal assembly 9 and the lubricating assembly 8 to move perpendicularly to the moving direction of the scraper chain 3. The transverse assembly 7 provides a restriction perpendicular to the moving direction of the scraper chain 3 for the scraper chain 3. The longitudinal assembly 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, so that the scraper chain 3 is tensioned. Specifically, the telescopic end of the telescopic device 405 can drive the mobile frame 601 and the extension frame 603 to move synchronously, thereby driving the transverse component 7, the longitudinal component 9, and the lubrication component 8 to move, thereby driving the scraper chain 3 to move toward the fixed plate 403, so that the scraper chain 3 is in a tensioned state; The fixed wheel 705 and the adjusting wheel 703 are in contact with the scraper chain 3, and can provide a restriction perpendicular to the movement direction of the scraper chain 3 for the scraper chain 3; The circumferential surface of the vertical column 904 is in contact with the side of the scraper chain 3, thereby providing restriction to the side of the scraper chain 3. The circumferential surface of the supporting column 903 provides support and restriction to the lower surface of the scraper chain 3, thereby preventing the scraper chain 3 from moving downward. Since the radius of the receiving edge 902 is larger than the receiving shell 901, the receiving edge 902 can receive the lubricating oil liquid dropped by the scraper chain 3, and the lubricating oil liquid will fall into the receiving shell 901 along the receiving inclined surface 9021, thereby avoiding waste of lubricating oil liquid. At the same time, due to the rotation of the supporting column 903, the lubricating oil liquid will adhere to the circumferential surface of the supporting column 903, so that the lubricating oil liquid adheres to the lower surface of the scraper chain 3, thereby playing a lubricating role.

[0030] Step 3: Use the lubrication assembly 8 to apply lubricating oil to the scraper chain 3; Specifically, lubricating oil can be added to the main shell 801 and the auxiliary shell 803 through the adding tube 802. Due to the design of the sealing gasket 806, when the main lubricating column 805 and the auxiliary lubricating column 804 do not rotate, the lubricating oil will not fall. 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, the main lubricating column 805 and the auxiliary lubricating column 804 will rotate under the action of friction. When the main lubricating column 805 and the auxiliary lubricating column 804 rotate, the lubricating oil in the receiving groove 807 will fall into the main lubricating column 805 and the auxiliary lubricating column 804, and then fall on the adjusting wheel 703 and the fixed wheel 705, so that the lubricating oil is smeared on the scraper chain 3.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic tensioning device for a scraper chain in an underground coal mine, comprising a scraper body (1), wherein a scraper chain (3) is arranged in the scraper body (1), characterized in that: Also includes: A fixing plate (403), wherein the fixing plate (403) is fixedly mounted on the inner side of the scraper body (1); A distance measuring component, the distance measuring component is used to measure the distance between the scraper chain (3) and the fixed plate (403); A moving assembly (6), the moving assembly (6) being arranged on the inner side of the scraper chain (3) and being used to provide power for moving perpendicularly to the moving direction of the scraper chain (3); The moving assembly (6) comprises a telescopic device (405) fixedly mounted on a fixed plate (403); an output end of the telescopic device (405) is fixedly connected to a moving frame (601); and a lower portion of the moving frame (601) is fixedly connected to an extension frame (603); A transverse component (7), the transverse component (7) being arranged at the lower part of the movable frame (601) and being used for providing a restriction perpendicular to the movement direction of the scraper chain (3) for the scraper chain (3); a lubrication assembly (8), the lubrication assembly (8) being arranged on the upper part of the movable frame (601) and being used for applying lubricating oil to the scraper chain (3); A longitudinal component (9) is arranged on the extension frame (603) and is used to provide a restriction for the scraper chain (3) parallel to the movement direction of the scraper chain (3) and to receive dripping lubricating oil and use the lubricating oil to apply lubricating oil to the scraper chain (3).

2. The automatic chain tensioning device for a scraper conveyor in a coal mine according to claim 1, characterized in that: The distance measuring component comprises a protection frame (401) fixedly mounted on a fixing 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. The automatic chain tensioning device for a scraper conveyor in a coal mine according to claim 1, characterized in that: The moving assembly (6) further comprises a guide rail (404) fixedly mounted on the fixed plate (403); a slider (602) is fixedly connected to the side of the moving frame (601); the slider (602) is slidably matched with the guide rail (404); and there are two guide rails (404).

4. The automatic chain tensioning device for a scraper conveyor in a coal mine according to claim 1, characterized in that: The transverse assembly (7) comprises a transverse bar (701) fixedly mounted on a mobile frame (601); a fixed wheel (705) is rotatably connected to the middle portion of the transverse bar (701); an elastic washer (704) and an adjusting wheel (703) are symmetrically sleeved on the transverse bar (701); the adjusting wheel (703) is located outside the elastic washer (704); an adjusting nut (702) is threadedly connected to the end of the transverse bar (701); the adjusting nut (702) is located outside the adjusting wheel (703); and a cone portion (7031) and an edge portion (7032) are provided at one end of the adjusting wheel (703) close to the fixed wheel (705).

5. The automatic chain tensioning device for a scraper conveyor in an underground coal mine according to claim 1, characterized in that: The lubrication assembly (8) comprises a main shell (801), to which an addition pipe (802) is fixedly connected, and an auxiliary shell (803) is fixedly connected at the end of the main shell (801), and a main lubrication column (805) and an auxiliary lubrication column (804) are rotatably connected at the lower parts of the main shell (801) and the auxiliary shell (803), respectively, and accommodating grooves (807) are provided on the circumferential surfaces of the main lubrication column (805) and the auxiliary lubrication column (804), and sealing gaskets (806) are provided between the main shell (801) and the main lubrication column (805) and between the auxiliary shell (803) and the auxiliary lubrication column (804).

6. The automatic chain tensioning device for a scraper conveyor in an underground coal mine according to claim 1, characterized in that: The longitudinal component (9) comprises a connecting shaft (905) fixedly mounted on the extension frame (603), the connecting shaft (905) being rotatably connected to a vertical column (904), the lower end of the connecting shaft (905) being rotatably connected to a receiving shell (901), the upper part of the receiving shell (901) being fixedly connected to a receiving edge (902), the receiving edge (902) being provided with a receiving inclined surface (9021) inclined inwardly, and a supporting column (903) being rotatably mounted on the inner side of the receiving shell (901), the supporting column (903) being evenly arranged around the circumference.

7. The automatic chain tensioning device for a scraper conveyor in an underground coal mine according to claim 1, characterized in that: The scraper body (1) is mounted with a scraper motor (2), a driving shaft (201), and a driven shaft (203); the driving shaft (201) is fixedly connected to a driving sprocket (202); the driven shaft (203) is fixedly connected to a driven sprocket (204); and the scraper chain (3) is arranged between the driving sprocket (202) and the driven sprocket (204).

8. An automatic tensioning method for a scraper chain in a coal mine, using an automatic tensioning device for a scraper chain in a coal mine as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: using a distance measuring component to measure the distance between the scraper chain (3) and the fixed plate (403), and judging whether the scraper chain (3) is in a loose state based on the distance value; Step 2: using the moving component (6) to drive the transverse component (7), the longitudinal component (9) and the lubricating component (8) to move perpendicularly to the moving direction of the scraper chain (3), the transverse component (7) provides the scraper chain (3) with a restriction perpendicular to the moving direction of the scraper chain (3), the longitudinal component (9) provides the scraper chain (3) with a restriction parallel to the moving direction of the scraper chain (3) and receives dripping lubricating oil and uses the lubricating oil to apply lubricating oil to the scraper chain (3), so that the scraper chain (3) is tensioned; Step 3: Use the lubrication assembly (8) to apply lubricating oil to the scraper chain (3).

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