An ultra-long working face scraper conveyor with solid lubricating structure

Abstract

The present application relates to the technical field of scraper conveyor, in particular to a kind of super-long working face scraper conveyor using solid lubrication structure, including conveyor body, chain and scraper assembly;The inside of the conveyor body has horizontally arranged chute;The chain is installed in the chute around horizontal axis, and the scraper assembly is uniformly and spaced apart around the chain, the scraper assembly includes fixed frame, adjusting shaft, scraper and torsion spring, the fixed frame is fixedly connected on the chain, the adjusting shaft is rotationally assembled on the fixed frame, the scraper is rectangular plate, and the scraper is rotationally arranged on the adjusting shaft, and the torsion spring is connected between the scraper and the adjusting shaft;In initial state, torsion spring makes the scraper have a certain angle relative to vertical direction, and when conveying material, the scraper is in vertical state, so that the bottom surface of the scraper and the groove bottom surface of the chute are slidingly connected, so that the scraper is not easy to wear, and the service life of the scraper is prolonged.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, and in particular to an ultra-long working face scraper conveyor with a solid lubrication structure. Background Technology

[0002] A scraper conveyor is a device that uses a scraper chain as the traction component to continuously transport bulk materials within a chute. It is widely used in mining (especially coal mining), power, and chemical industries, and is one of the core supporting equipment in fully mechanized mining faces. Its working principle is as follows: scrapers are fixed to a chain to form a scraper chain. After startup, the head sprocket drives the scraper chain in a closed-loop motion. The scrapers closely follow the bottom surface of the chute, pushing the material along the chute, and finally unloading at the head of the conveyor, completing the continuous conveying process. Due to the extra-long working face of the scrapers, the material conveying efficiency is high.

[0003] For example, patent application CN120717119A discloses a scraper chain structure for mining machinery, which includes a conveyor body and a conveying structure mounted on the conveyor body. The conveying structure includes a mounting shaft rotatably connected to the conveyor body and a sprocket fixedly connected to the mounting shaft. A chain is provided on the sprocket, and a scraper is mounted on the chain. The movement of the scraper realizes the conveying of materials. However, this scraper chain structure has obvious defects. When the equipment is running unloaded, the scraper will continuously abut against the bottom surface of the chute inside the conveyor body, which will cause friction between the scraper and the chute and easily damage the scraper. Summary of the Invention

[0004] Therefore, it is necessary to address the technical problem of easy damage to scrapers in current scraper conveyors by providing an ultra-long working face scraper conveyor with a solid lubrication structure.

[0005] The above objectives are achieved through the following technical solutions:

[0006] An ultra-long working face scraper conveyor with a solid lubrication structure includes a conveyor body, a chain, and a scraper assembly. The conveyor body has a horizontally arranged chute inside. The chain is rotatably mounted within the chute around a horizontal axis, with the width direction of the chain aligned with the width direction of the chute. The scraper assembly comprises multiple scrapers evenly spaced around the chain's circumference. Each scraper assembly includes a fixed frame, an adjusting shaft, scrapers, and torsion springs. The fixed frame is fixedly connected to the chain, and the adjusting shaft is mounted on the fixed frame to prevent rotation. The adjusting shaft extends along the width direction of the chute. The scraper is a rectangular plate, with its length direction aligned with the width direction of the chute. The scraper is rotatably mounted on an adjusting shaft, and a torsion spring connects the scraper and the adjusting shaft. Initially, there is a gap between the scraper and the side wall of the chute, and the torsion spring causes the scraper to have a certain angle relative to the vertical direction, resulting in a gap between the bottom of the scraper and the bottom surface of the chute. When conveying materials, the scraper can overcome the force of the torsion spring and rotate downward around the adjusting shaft under the resistance of the material, thereby making the scraper vertical and allowing the bottom surface of the scraper to slide against the bottom surface of the chute.

[0007] Furthermore, a driving structure is provided between the scraper and the adjusting shaft. The driving structure enables the scraper to move synchronously along the width direction of the chute when it rotates downward around the adjusting shaft, thereby making the scraper contact the side wall of the chute.

[0008] Furthermore, the adjusting shaft is slidably mounted on the fixed frame along the width direction of the chute. The scraper has a fixed sleeve, which is rotatably mounted on the outside of the adjusting shaft. The driving structure includes a groove on the outer circumferential surface of the adjusting shaft and a protrusion on the inner circumferential surface of the fixed sleeve. The protrusion is slidably mounted in the groove. The groove has a first groove and a second groove that are interconnected and are distributed along the axial direction of the adjusting shaft. When the protrusion is located in the first groove, the downward rotation of the scraper allows the protrusion to slide along a first direction, which is the width direction of the chute. When the protrusion is located in the second groove, the downward rotation of the scraper allows the protrusion to slide in the opposite direction of the first direction. The protrusions on two adjacent scrapers are respectively located in the first groove and the second groove of the corresponding adjusting shaft, so that the moving directions of the two adjacent scrapers are opposite.

[0009] Furthermore, the bottom of the first groove has a first inclined surface. When the protrusion is located in the first groove, the downward rotation of the scraper allows the protrusion to slide along the first inclined surface, thereby pushing the scraper to slide in the first direction. The bottom of the second groove has a second inclined surface. When the protrusion is located in the second groove, the downward rotation of the scraper allows the protrusion to slide along the second inclined surface, thereby pushing the scraper to slide in the opposite direction of the first direction.

[0010] Furthermore, one end of the adjusting shaft is provided with a magnetic part, which is in contact with the fixing frame; the magnetic parts on the adjusting shafts of two adjacent scraper assemblies are arranged in opposite directions, so that the protrusions on the two adjacent scrapers are respectively located in the first groove and the second groove of the corresponding adjusting shaft.

[0011] Furthermore, the conveyor body has a feed inlet and a discharge outlet, the feed inlet being located above the conveyor body and the discharge outlet being located below the conveyor body, and the feed inlet and discharge outlet being located at opposite ends of the conveyor body along its length.

[0012] Furthermore, the chute is provided with a magnetic attraction adjustment component, which is located near the feed inlet. The magnetic attraction adjustment component includes a first magnet and a second magnet respectively disposed on both sides of the chain width direction. The first magnet and the second magnet both extend along a first direction, and the first magnet and the second magnet both have a first end and a second end with opposite magnetic properties. The first end repels the magnetic part, and the second end attracts the magnetic part. In the initial state, the first end of the first magnet and the first end of the second magnet are positioned opposite each other.

[0013] Furthermore, both the first magnet and the second magnet are capable of rotating around a vertical axis. Each time the chain rotates once, both the first magnet and the second magnet rotate once around the vertical axis.

[0014] Furthermore, the chute has a driving wheel and a driven wheel at both ends along its length, and the chain is simultaneously mounted on the driving wheel and the driven wheel. The driving wheel is located near the discharge port, and the driven wheel is located near the feed port. The driving wheel is connected to a drive motor, which drives the chain to rotate within the chute.

[0015] Furthermore, the bottom surface of the scraper is provided with blind holes arranged in a regular array, and the blind holes are filled with solid lubricant.

[0016] The beneficial effects of this invention are:

[0017] The ultra-long working face scraper conveyor provided by this invention, employing a solid lubrication structure, firstly, has gaps between the scraper and the sidewalls and bottom of the chute when the scraper is in an unloaded state (i.e., the scraper is not conveying material), thus reducing wear on the scraper and extending its service life. Furthermore, the scraper is elastically connected to the adjusting shaft by a torsion spring, giving the scraper a certain buffering capacity during material conveying. When the scraper conveyor frequently starts and stops, the torsion spring effectively absorbs and releases the instantaneous impact of the material on the scraper, thereby preventing damage caused by frequent material impacts and further extending its service life.

[0018] Secondly, by setting up a drive structure, when conveying materials, the scraper rotates downward and moves along the width of the chute, so that the bottom surface of the scraper slides into contact with the bottom surface of the chute, and at the same time the scraper contacts the side wall of the chute. This can scrape off the material attached to the side wall of the chute and improve the material conveying efficiency.

[0019] Third, the two adjacent scrapers contact the two side walls of the chute respectively, so that the material adhering to the two side walls of the chute can be scraped off. At the same time, the two scrapers complement each other in the direction of movement, which can effectively intercept and transport the material missed by the side of the previous scraper, reduce the side leakage of material, and thus improve the material conveying efficiency.

[0020] Fourth, by setting up magnetic adjustment components, both sides of each scraper can alternately rub against the side wall of the chute, thereby making the wear of both sides of the scraper uniform and avoiding uneven wear, skewing or even jamming caused by long-term unilateral force on the scraper. This further ensures the operational stability of the scraper conveyor and the service life of the scraper. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an ultra-long working surface scraper conveyor with a solid lubrication structure provided in an embodiment of the present invention;

[0022] Figure 2 A side view of an ultra-long working face scraper conveyor with a solid lubrication structure provided in an embodiment of the present invention. Figure 1 ;

[0023] Figure 3 for Figure 2 Schematic diagram of the AA section;

[0024] Figure 4 for Figure 3 Enlarged view of the structure at point D;

[0025] Figure 5 for Figure 3 Another state diagram;

[0026] Figure 6 for Figure 5 Enlarged view of the structure at point E in the middle;

[0027] Figure 7 A side view of an ultra-long working face scraper conveyor with a solid lubrication structure provided in an embodiment of the present invention. Figure 2 ;

[0028] Figure 8 for Figure 7 Schematic diagram of the BB section;

[0029] Figure 9 for Figure 8 Enlarged view of the structure at point F in the middle;

[0030] Figure 10 for Figure 8 Enlarged view of the structure at point G in the middle;

[0031] Figure 11 A three-dimensional structural diagram of the scraper assembly in an ultra-long working face scraper conveyor with a solid lubrication structure provided in an embodiment of the present invention;

[0032] Figure 12 This is a side view of a scraper assembly in an ultra-long working face scraper conveyor with a solid lubrication structure, according to an embodiment of the present invention.

[0033] Figure 13 for Figure 12 Schematic diagram of the CC section;

[0034] Figure 14 for Figure 13 Enlarged view of the structure at point H.

[0035] in:

[0036] 100. Conveyor body; 101. Drive wheel; 102. Drive motor; 103. Discharge port; 104. Driven wheel; 105. Feed port; 200. Chute; 201. Chain; 2021. Scraper; 2022. Fixing frame; 2023. Adjusting shaft; 20231. First trough; 20232. Second trough; 2024. Fixing sleeve; 20241. Protrusion; 2025. Magnetic part; 203. First magnet; 204. Second magnet. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] like Figures 1 to 14 As shown, an embodiment of the present invention provides an ultra-long working face scraper conveyor (hereinafter referred to as scraper conveyor) with a solid lubrication structure, including a conveyor body 100, a chain 201 and a scraper assembly; the conveyor body 100 has a horizontally arranged chute 200 inside; the chain 201 is rotatably installed in the chute 200 around a horizontal axis, and the width direction of the chain 201 is consistent with the width direction of the chute 200. The scraper assembly comprises multiple scrapers evenly spaced around the chain 201 in a circumferential direction. Each scraper assembly includes a fixing frame 2022, an adjusting shaft 2023, scrapers 2021, and a torsion spring. The fixing frame 2022 is fixedly connected to the chain 201. The adjusting shaft 2023 is mounted on the fixing frame 2022 to prevent rotation. The adjusting shaft 2023 extends along the width direction of the chute 200. The scraper 2021 is a rectangular plate, with its length direction aligned with the width direction of the chute 200. The scraper 2021 is rotatably mounted on the adjusting shaft 2023. A spring connects the scraper 2021 and the adjusting shaft 2023. In the initial state, there is a gap between the scraper 2021 and the side wall of the chute 200. The torsion spring makes the scraper 2021 have a certain angle relative to the vertical direction, so that there is a gap between the bottom end of the scraper 2021 and the bottom surface of the chute 200. When conveying materials, the scraper 2021 can overcome the force of the torsion spring under the resistance of the material and rotate downward around the adjusting shaft 2023, so that the scraper 2021 is in a vertical state, and then the bottom surface of the scraper 2021 slides into contact with the bottom surface of the chute 200.

[0041] In this way, when the scraper 2021 is in an unloaded state (i.e., when the scraper 2021 is not conveying material), there are gaps between the scraper 2021 and the side wall of the chute 200, as well as the bottom surface of the chute 200. This reduces wear on the scraper 2021 and extends its service life. Furthermore, the scraper 2021 is elastically connected to the adjusting shaft 2023 by a torsion spring, giving it a certain buffering capacity during material conveying. When the scraper conveyor frequently starts and stops, the torsion spring effectively absorbs and releases the instantaneous impact of material on the scraper 2021, thus preventing damage caused by frequent material impacts and further extending its service life.

[0042] Furthermore, a driving structure is provided between the scraper 2021 and the adjusting shaft 2023. This driving structure enables the scraper 2021 to move synchronously along the width direction of the chute 200 as it rotates downwards around the adjusting shaft 2023, thereby bringing the scraper 2021 into contact with the sidewall of the chute 200. By providing this driving structure, during material conveying, the scraper 2021 rotates downwards while moving along the width direction of the chute 200, causing the bottom surface of the scraper 2021 to slide into contact with the bottom surface of the chute 200. Simultaneously, the scraper 2021 contacts the sidewall of the chute 200, thus scraping away material adhering to the sidewall of the chute 200 and improving material conveying efficiency.

[0043] Further, the adjusting shaft 2023 is slidably mounted on the fixed frame 2022 along the width direction of the chute 200. The scraper 2021 has a fixed sleeve 2024, which is rotatably mounted on the outside of the adjusting shaft 2023. The driving structure includes a groove on the outer circumferential surface of the adjusting shaft 2023 and a protrusion 20241 on the inner circumferential surface of the fixed sleeve 2024. The protrusion 20241 is slidably mounted in the groove. The groove has a first groove 20231 and a second groove 20232 that are interconnected, and the first groove 20231 and the second groove 20232 are slidably mounted along the width direction of the adjusting shaft 2023. The axial distribution of the shaft 2023 allows the convex point 20241 to slide along a first direction when it is located in the first groove 20231, as the downward rotation of the scraper 2021 enables the convex point 20241 to slide along the width direction of the chute 200. When the convex point 20241 is located in the second groove 20232, the downward rotation of the scraper 2021 enables the convex point 20241 to slide in the opposite direction of the first direction. The convex points 20241 on two adjacent scrapers 2021 are respectively located in the first groove 20231 and the second groove 20232 of the corresponding adjusting shaft 2023, so that the moving directions of the two adjacent scrapers 2021 are opposite.

[0044] In this way, two adjacent scrapers 2021 contact the two side walls of the chute 200 respectively, so that the material attached to the two side walls of the chute 200 can be scraped off. At the same time, the two scrapers 2021 complement each other in the direction of movement, which can effectively intercept and convey the material missed by the side of the previous scraper 2021 forward, reduce the side leakage of material, and thus improve the material conveying efficiency.

[0045] Furthermore, the bottom of the first groove 20231 has a first inclined surface. When the protrusion 20241 is located in the first groove 20231, the downward rotation of the scraper 2021 allows the protrusion 20241 to slide along the first inclined surface, thereby pushing the scraper 2021 to slide in the first direction. The bottom of the second groove 20232 has a second inclined surface. When the protrusion 20241 is located in the second groove 20232, the downward rotation of the scraper 2021 allows the protrusion 20241 to slide along the second inclined surface, thereby pushing the scraper 2021 to slide in the opposite direction of the first direction.

[0046] Specifically, the first and second inclined surfaces have opposite directions of inclination and are both inclined relative to the vertical direction. In this way, the first and second inclined surfaces can guide the protrusion 20241 to slide along the first direction or the reverse direction of the first direction, so that the two adjacent scrapers 2021 can move in opposite directions, and the two adjacent scrapers 2021 can contact the two side walls of the chute 200 respectively.

[0047] Furthermore, one end of the adjusting shaft 2023 is provided with a magnetic part 2025, which is in contact with the fixing frame 2022; the magnetic parts 2025 on the adjusting shafts 2023 of two adjacent scraper assemblies are arranged in opposite directions, so that the protrusions 20241 on the two adjacent scrapers 2021 are respectively located in the first groove 20231 and the second groove 20232 of the corresponding adjusting shaft 2023.

[0048] Specifically, the fixing frame 2022 includes two inverted U-shaped fixing clips. The fixing frame 2022 has an inner side plate close to the chain 201 and an outer side plate away from the chain 201. The adjusting shaft 2023 passes through the inner side plate and is anti-rotationally engaged with the inner side plate through a keyway. The magnetic part 2025 at the end of the adjusting shaft 2023 is in contact with the outer side plate.

[0049] Specifically, the magnetic part 2025 is a magnet fixedly mounted at the end of the adjusting shaft 2023, and the fixing bracket 2022 is made of stainless steel, which does not affect the normal penetration of the magnetic field lines. Figure 13As shown, the first groove 20231 and the second groove 20232 are distributed sequentially to the left and right. When the magnetic part 2025 is located on the left side of the adjusting shaft 2023 and in contact with the left side of the fixing frame 2022, the protrusion 20241 is located in the second groove 20232; when the magnetic part 2025 is located on the right side of the adjusting shaft 2023 and in contact with the right side of the fixing frame 2022, the protrusion 20241 is located in the first groove 20231.

[0050] Furthermore, the conveyor body 100 has an inlet 105 and an outlet 103. The inlet 105 is located above the conveyor body 100, and the outlet 103 is located below the conveyor body 100. The inlet 105 and the outlet 103 are located at opposite ends of the conveyor body 100 along its length. The material enters through the inlet 105 and falls onto the bottom surface of the chute 200, and is then discharged towards the outlet 103 under the pushing action of the scraper 2021.

[0051] Furthermore, a magnetic attraction adjustment component is provided inside the chute 200. The magnetic attraction adjustment component is located near the feed inlet 105. The magnetic attraction adjustment component includes a first magnet 203 and a second magnet 204 respectively disposed on both sides of the width direction of the chain 201. The first magnet 203 and the second magnet 204 both extend along a first direction, and the first magnet 203 and the second magnet 204 both have a first end and a second end with opposite magnetic properties. The first end repels the magnetic part 2025, and the second end attracts the magnetic part 2025. In the initial state, the first end of the first magnet 203 and the first end of the second magnet 204 are positioned opposite each other.

[0052] In this embodiment, the magnetic part 2025 is an N pole, with the first end being an N pole and the second end being a S pole. In other embodiments, the magnetic part 2025 is an S pole, with the first end being an S pole and the second end being an N pole.

[0053] The magnetic adjustment component is positioned near the feed inlet 105, so that when the scraper 2021 rotates along the conveying direction through the discharge outlet 103 to the position corresponding to the magnetic adjustment component, the scraper 2021 is in an unloaded state. Figure 10As shown, the first magnet 203 is located on the right side of the chain 201, and the second magnet 204 is located on the left side of the chain 201. At this time, the first end of the first magnet 203 repels the magnetic part 2025 located on the right side of the adjusting shaft 2023, allowing the adjusting shaft 2023 to move to the left, so that the protrusion 20241 on the scraper 2021 enters the second groove 20232 from the first groove 20231; while the first end of the second magnet 204 repels the magnetic part 2025 located on the left side of the adjusting shaft 2023, allowing the adjusting shaft 2023 to move to the right, so that the protrusion 20241 on the scraper 2021 enters the first groove 20231 from the second groove 20232. By setting up magnetic adjustment components, both sides of each scraper 2021 can alternately rub against the two side walls of the chute 200, thereby ensuring uniform wear on both sides of the scraper 2021. This avoids uneven wear, skewing, or even jamming of the scraper 2021 due to long-term unilateral force, further guaranteeing the operational stability of the scraper conveyor and the service life of the scraper 2021.

[0054] Furthermore, both the first magnet 203 and the second magnet 204 are capable of rotating around a vertical axis. Each time the chain 201 rotates one revolution, both the first magnet 203 and the second magnet 204 rotate one revolution around their respective vertical axes. Specifically, the conveyor body 100 is equipped with a rotary motor, which drives the first magnet 203 and the second magnet 204 to rotate around their respective vertical axes. In this way, each time the chain 201 rotates one revolution, the scraper 2021 switches positions, making the wear on both sides of the scraper 2021 more even and extending its service life.

[0055] Furthermore, the chute 200 is provided with a drive wheel 101 and a driven wheel 104 at both ends along its length. The chain 201 is simultaneously sleeved on the drive wheel 101 and the driven wheel 104. The drive wheel 101 is located near the discharge port 103, and the driven wheel 104 is located near the feed port 105. The drive wheel 101 is connected to a drive motor 102, which is used to drive the chain 201 to rotate within the chute 200.

[0056] Furthermore, the bottom surface of the scraper 2021 is provided with blind holes arranged in a regular array, and the blind holes are filled with solid lubricant.

[0057] Specifically, the scraper 2021 is made of high-strength wear-resistant steel plate. The bottom surface of the scraper 2021 is sandblasted, ultrasonically cleaned, and dried to thoroughly remove oil and impurities. Then, using a femtosecond laser processing system, blind holes with a diameter of Φ100μm and a depth of 150μm (depth-to-diameter ratio 1.5), arranged in a square array (center-to-center spacing 300μm), are machined in the pre-set contact area on the bottom surface of the scraper 2021. Lubricant is then filled into the blind holes, and finally, the scraper 2021 is placed in an oven and cured using a gradient heating process. This blind hole structure acts as an independent "oil reservoir," effectively preventing the lubricant from being quickly scraped away during the initial startup of the scraper conveyor. During friction, the solid lubricant inside the blind holes is heated and slowly and continuously released to the contact surface under mechanical extrusion, forming a stable transferred lubricating film. This transforms direct metal-to-metal friction into lubricating film shearing, thereby maintaining a low coefficient of friction and low wear rate over a long period.

[0058] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows:

[0059] In the initial state, such as Figure 3 As shown, scraper 2021 is in an unloaded state. At this time, drive motor 102 drives drive wheel 101 to rotate slowly or remain stationary. Scraper 2021 remains inclined under the preload of the torsion spring, with its working surface forming a certain angle relative to the vertical direction. Therefore, there is a gap between the bottom surface of scraper 2021 and the bottom surface of chute 200, and also a gap between the side surface of scraper 2021 and the side wall of chute 200. Scraper 2021 does not contact chute 200. This effectively avoids ineffective friction and wear between scraper 2021 and chute 200 when the scraper conveyor is running unloaded or in standby mode, extending the service life of scraper 2021.

[0060] When material falls from the feed inlet 105 to the bottom of the chute 200 and accumulates in front of the scraper 2021, the movement of the scraper 2021 causes the material to exert resistance on it. The torque generated by this resistance overcomes the force of the torsion spring, driving the scraper 2021 to rotate downwards around the adjusting shaft 2023 as follows: Figure 5The vertical position is shown. At this point, under the action of the drive structure, the scraper 2021 rotates downwards while moving along the width direction of the chute 200, causing the scraper 2021 to contact one of the side walls of the chute 200. Since the protrusions 20241 on adjacent scrapers 2021 are located in the first groove 20231 and the second groove 20232 of the corresponding adjusting shaft 2023, adjacent scrapers 2021 contact the two side walls of the chute 200 respectively. In this way, the scraper 2021 scrapes off the material adhering to the two side walls of the chute 200 while conveying the material, thereby improving conveying efficiency. During continuous material conveying, the solid lubricant filled in the blind holes on the bottom surface of the scraper 2021 is slowly and continuously released to the contact surface, forming a stable lubricating film, thereby reducing sliding friction.

[0061] After the scraper 2021 returns to the feed inlet 105 from the discharge port 103, it passes through the magnetic adjustment component. The first magnet 203 and the second magnet 204 of the magnetic adjustment component repel the magnetic part 2025 on the adjustment shaft 2023 of each scraper assembly, thereby changing the position of the protrusion 20241 on each scraper 2021 in the first groove 20231 or the second groove 20232 on the adjustment shaft 2023. When each scraper 2021 is resisted by the material again and rotates downward, each scraper 2021 moves in the opposite direction to the previous movement, thereby changing the contact position between each scraper 2021 and the side wall of the chute 200. In this way, the wear on both sides of the scraper 2021 is uniform, extending the service life of the scraper 2021.

[0062] When the scraper 2021 passes through the discharge port 103 and returns to the feed port 105, and then passes through the magnetic adjustment component again, the first magnet 203 and the second magnet 204 on the magnetic adjustment component both rotate around the vertical axis for one revolution. This causes each scraper 2021 to move in the opposite direction to the previous movement, changing its contact position with the side wall of the chute 200. In this way, each time the chain 201 rotates once, the scraper 2021 changes its contact position with the chute 200, achieving uniform wear on both sides of the scraper 2021. This effectively prevents uneven wear, skewing, or even jamming of the scraper 2021 caused by long-term unilateral force, further ensuring the operational stability of the scraper conveyor and the service life of the scraper 2021.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An ultra-long face flight conveyor employing a solid lubricated construction, characterized by, include: A conveyor body, the interior of which has horizontally arranged chutes; A chain, which is rotatably mounted in the chute about a horizontal axis, with the width direction of the chain aligned with the width direction of the chute; A scraper assembly is provided, comprising multiple scraper components evenly spaced around a chain in the circumferential direction. The scraper assembly includes a fixed frame, an adjusting shaft, a scraper, and a torsion spring. The fixed frame is fixedly connected to the chain, and the adjusting shaft is mounted on the fixed frame to prevent rotation. The adjusting shaft extends along the width direction of the chute. The scraper is a rectangular plate, and its length direction is consistent with the width direction of the chute. The scraper is rotatably mounted on the adjusting shaft, and the torsion spring is connected between the scraper and the adjusting shaft. Initially, there is a gap between the scraper and the sidewall of the chute. The torsion spring makes the scraper have a certain angle relative to the vertical direction, thus creating a gap between the bottom of the scraper and the bottom surface of the chute. When conveying materials, the scraper can overcome the force of the torsion spring and rotate downward around the adjusting shaft under the resistance of the material, thereby making the scraper vertical and allowing the bottom surface of the scraper to slide against the bottom surface of the chute. A driving structure is provided between the scraper and the adjusting shaft. The driving structure enables the scraper to move synchronously along the width direction of the chute when rotating downward around the adjusting shaft, thereby making the scraper contact the sidewall of the chute. The adjusting shaft is slidably mounted on the fixed frame along the width direction of the chute. The scraper has a fixed sleeve, which is rotatably mounted on the outside of the adjusting shaft. The driving structure includes a groove on the outer circumference of the adjusting shaft and a protrusion on the inner circumference of the fixed sleeve. The protrusion is slidably mounted in the groove. The groove has a first groove and a second groove that are interconnected and distributed along the axial direction of the adjusting shaft. When the protrusion is located in the first groove, the groove is positioned in the second groove. When the scraper is in the trough, the downward rotation of the scraper allows the protrusion to slide along the first direction, which is the width direction of the trough. When the protrusion is in the second trough, the downward rotation of the scraper allows the protrusion to slide in the opposite direction of the first direction. The protrusions on two adjacent scrapers are respectively located in the first and second troughs of the corresponding adjustment shaft, so that the moving directions of the two adjacent scrapers are opposite. The bottom of the first trough has a first inclined surface. When the protrusion is in the first trough, the downward rotation of the scraper allows the protrusion to slide along the first inclined surface, thereby pushing the scraper to slide along the first direction. The bottom of the second trough has a second inclined surface. When the protrusion is in the second trough, the downward rotation of the scraper allows the protrusion to slide along the second inclined surface, thereby pushing the scraper to slide in the opposite direction of the first direction. One end of the adjustment shaft is provided with a magnetic part, which contacts and cooperates with the fixing frame. The magnetic parts on the adjustment shafts of two adjacent scraper assemblies are arranged in opposite directions, so that the protrusions on two adjacent scrapers are respectively located in the first and second troughs of the corresponding adjustment shaft. The trough is provided with a magnetic adjustment component that cooperates with the magnetic part.

2. The ultra-long face flight conveyor employing a solid lubrication structure according to claim 1, characterized in that, The conveyor body has a feed inlet and a discharge outlet. The feed inlet is located above the conveyor body, and the discharge outlet is located below the conveyor body. The feed inlet and the discharge outlet are located at opposite ends of the conveyor body along its length.

3. The ultra-long face flight conveyor employing a solid lubrication structure according to claim 2, characterized in that, The magnetic adjustment component is located near the feed inlet. The magnetic adjustment component includes a first magnet and a second magnet respectively disposed on both sides of the chain width direction. The first magnet and the second magnet both extend along a first direction, and the first magnet and the second magnet both have a first end and a second end with opposite magnetic properties. The first end repels the magnetic part, and the second end attracts the magnetic part. In the initial state, the first end of the first magnet and the first end of the second magnet are arranged opposite each other.

4. The ultra-long face flight conveyor employing a solid lubrication structure according to claim 3, characterized in that, Both the first magnet and the second magnet are capable of rotating around a vertical axis. Each time the chain rotates once, both the first magnet and the second magnet rotate once around the vertical axis.

5. The ultra-long face flight conveyor employing a solid lubrication structure according to claim 4, characterized in that, The chute has a drive wheel and a driven wheel at both ends along its length. The chain is sleeved on both the drive wheel and the driven wheel. The drive wheel is located near the discharge port, and the driven wheel is located near the feed port. The drive wheel is connected to a drive motor, which drives the chain to rotate inside the chute.

6. The ultra-long face flight conveyor employing a solid lubrication structure according to claim 1, wherein, The bottom surface of the scraper is provided with blind holes arranged in a regular array, and the blind holes are filled with solid lubricant.

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