Bulk material flexible conveying device and integrated excavating and mining coal mining machine

Abstract

The present application provides a flexible bulk material conveying device and an integrated mining and loading coal mining machine, wherein the flexible bulk material conveying device comprises a plurality of conveying units with the same structure, and two adjacent conveying units are horizontally hinged to form a horizontally swingable serpentine structure. The conveying unit comprises a conveying groove body and a rotating stirring member installed in the conveying groove body, the conveying groove bodies of two adjacent conveying units are connected in series, and the output end of the conveying groove body in the upper conveying unit is higher than the input end of the conveying groove body in the lower conveying unit. The rotating axis of the rotating stirring member is perpendicular to the bottom surface of the conveying groove body, and the stirring blades on the rotating stirring member are arranged close to the groove bottom of the conveying groove body. The present application can reduce the problems of retention, accumulation and blockage caused by clumping and caking during coal conveying, and the flexible bulk material conveying device has high flexibility and can realize steering in a small space.

Description

Technical Field

[0001] This invention belongs to the field of coal mining technology, specifically relating to a flexible conveying device for bulk materials and an integrated tunneling and conveying coal mining machine that incorporates the device. Background Technology

[0002] In actual coal mining operations, raw coal typically exhibits characteristics such as uneven moisture content, significant particle size variations, and the presence of sticky impurities. Furthermore, influenced by factors such as the humid environment of underground roadways, water content in the coal seam, and the accumulation of mining dust, the mined raw coal is highly susceptible to moisture absorption, clumping, and agglomeration. During conveyor belt transport, the raw coal is further aggravated by multiple factors, including impact from falling material, material accumulation and compression, and uneven belt vibration. This leads to the accumulation, blockage, and retention of clumped coal on the belt surface, conveyor chutes, and belt side gaps, severely impacting the normal operation of the conveying system.

[0003] Meanwhile, in integrated tunneling and conveying mining processes, most existing coal mining equipment uses excavators to first dig the coal, and then relies on belt conveyors to transfer and transport the coal. The hinged joints on existing flexible belt conveyors have a small turning angle, often requiring a large turning radius to complete the turn. For example, Chinese patent document CN210557251U discloses a serpentine belt conveyor using flexible joint units, with its tail hinged to the tunneling machine, allowing it to move forward or backward with the machine, and transporting coal via the rotation of the belt conveyor. This existing belt conveyor requires a large turning radius to achieve a turn due to its structure. However, the space in underground roadways is limited. In some confined mining areas, especially when recovering corner coal and coal pillars, the existing flexible belt conveyors struggle to turn due to the space constraints of the working face, thus affecting the progress of coal mining.

[0004] To solve the above problems, an ideal technical solution is needed. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems by providing a flexible conveying device for bulk materials and an integrated mining and transportation machine that incorporates the device. By crushing and mixing the coal and adopting a small-batch conveying mode, the problems of stagnation, accumulation, and blockage caused by coal agglomeration during the conveying process can be reduced. At the same time, the flexible conveying device for bulk materials has a highly flexible hinged structure, which can achieve turning in a small space, thereby enabling its application in more scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a flexible conveying device for bulk materials, comprising multiple conveying units with identical structures, wherein two adjacent conveying units are horizontally hinged to each other so that the conveying units as a whole form a serpentine structure that can swing horizontally. The conveying unit includes a conveying trough and a rotating actuating component installed in the conveying trough, and the conveying troughs of two adjacent conveying units are connected end to end; The rotation axis of the rotating actuating component is perpendicular to the bottom surface of the conveying trough. The actuating blades on the rotating actuating component are set close to the bottom of the conveying trough, and are used to push bulk materials from the output end of the conveying trough in the previous conveying unit to the input end of the conveying trough in the next conveying unit and to agitate and stir the bulk materials.

[0007] The flexible conveying device in this solution includes multiple adjacent hinged conveying units. Each conveying unit includes a conveying trough and a rotating actuating component installed in the conveying trough. Two adjacent conveying troughs are connected end to end. The rotation axis of the rotating actuating component is perpendicular to the bottom surface of the conveying trough, and the actuating blades on the rotating actuating component are close to the bottom of the conveying trough, thereby enabling the bulk materials to be turned over and stirred to prevent clumping and to convey the bulk materials.

[0008] Furthermore, the height of the output end of the conveying trough in the previous level conveying unit is higher than the height of the input end of the conveying trough in the next level conveying unit, so as to form a backflow prevention structure.

[0009] Furthermore, the two side walls of the input end of the conveying trough are set in an arc-shaped flared shape, and the two side walls of the output end of the conveying trough are set in an arc-shaped constricted shape. The shape of the trough wall at the output end of the conveying trough in the previous conveying unit and the trough wall at the input end of the conveying trough in the next conveying unit are complementary and can interlock with each other, so as to serve as rotational guide surfaces for each other during the swinging process of the conveying unit.

[0010] This solution sets the two side walls of the input and output ends of the conveying trough into complementary arc shapes, and the output end of the upper-level conveying trough and the input end of the lower-level conveying trough interlock with each other. During the swinging process of the conveying unit, the two adjacent conveying troughs can have a high rotation amplitude, so that the flexible conveying device for bulk materials only needs a small turning space during the turning process. Thus, the device can be applied to environments with limited space, thereby expanding the applicability of the device.

[0011] Furthermore, the bottom of the output end of the conveying trough is a circular bottom adapted to the trough wall. The circular bottom is tilted and raised along the material conveying direction so that the height of the bottom of the output end is higher than the height of the bottom of the input end in the same conveying unit. The edge of the circular bottom is notched to prevent the circular bottom from interfering with the input end wall of the next conveying unit when turning. The rotating actuating component is synchronously and tilted at the bottom of the circular groove, and the distal end of the actuating blade extends toward the groove wall.

[0012] In this scheme, the bottom of the output end of the conveying trough is tilted and raised along the material conveying direction, so that the output end of the same conveying trough is higher than the input end. The rotating agitator is installed on the bottom of the output end, and the agitator blades on the rotating agitator stir and disperse the bulk material, so that the bulk material is transferred between two adjacent conveying troughs in small batches, thereby reducing the problems of material stagnation, accumulation and blockage caused by agglomeration during the conveying process, and thus ensuring the stability of the coal conveying process.

[0013] Furthermore, each conveyor trough is equipped with wheels at the bottom.

[0014] Furthermore, each conveying trough is provided with a connector at its bottom for connecting two adjacent conveying units. The connector includes a hinge plug and a hinge socket installed at both ends of the bottom of the conveying trough. The hinge plug is used to hinge with the hinge socket on an adjacent conveying trough, and the hinge socket is used to hinge with the hinge plug on another adjacent conveying trough.

[0015] In this solution, by installing hinge plugs and hinge sockets at both ends of the bottom of each conveying trough, multiple conveying troughs can be hinged together in sequence to form a flexible, serpentine structure.

[0016] The present invention also provides an integrated tunneling and hauling coal mining machine, including the above-mentioned flexible conveying device for bulk materials, a tunneling machine connected to the feed end of the flexible conveying device for bulk materials, and a belt conveyor connected to the discharge end of the flexible conveying device for bulk materials.

[0017] This solution integrates a flexible bulk material conveying device with a crusher and a belt conveyor. The flexible bulk material conveying device uses agitator blades to stir and decompose the coal, which is then transferred in small batches between adjacent conveying troughs. The last conveying trough also transfers coal to the belt conveyor in small batches, thereby reducing the problems of coal caking, stagnation, accumulation, and blockage during the conveying process, and ensuring the stability of the coal conveying process.

[0018] Furthermore, the flexible conveying device for bulk materials includes guide rails for guiding the conveying unit to rotate.

[0019] By setting guide rails in this solution, the traveling wheels on the flexible bulk material conveying device can easily turn along the guide rails, while preventing the flexible bulk material conveying device from colliding with the sidewall of the roadway during turning.

[0020] Furthermore, the excavator includes an excavator body, an excavating roller disposed at the front end of the excavator, a scraper conveyor disposed inside the excavator, and a discharge port disposed at the rear end of the excavator, the discharge port being connected to the feed end of the bulk material flexible conveying device.

[0021] This solution integrates the excavating drum and the scraper conveyor to achieve simultaneous and continuous operation of excavation, material feeding, on-site crushing, and scraper conveying. This facilitates unified and automated control of the equipment and helps improve coal mining efficiency.

[0022] Furthermore, the excavating drum includes an upper drum, a middle drum, and a lower drum. The upper drum, the middle drum, and the lower drum are all equipped with digging teeth. The upper drum excavates the coal wall by rotating. The lower drum transfers the coal to the middle drum by rotating. The bottom of the middle drum is equipped with a cylinder liner for supporting the coal. The middle drum further crushes the coal by rotating and then transfers it to the scraper conveyor.

[0023] This scheme, through the cooperation of the upper, middle, and lower drums, can initially crush the coal in the fully mechanized mining face and transfer it to the scraper conveyor inside the roadheader.

[0024] Compared with the prior art, the present invention has outstanding substantive features and significant progress. Specifically, the advantages of the present invention are as follows: 1. The bulk material flexible conveying device of the present invention is provided with multiple conveying units with the same structure and connected in sequence. Each conveying unit includes a conveying trough and a rotating actuating component installed in the conveying trough. The conveying troughs of two adjacent conveying units are connected end to end. The output end of the conveying trough in the upper-level conveying unit is higher than the input end of the conveying trough in the lower-level conveying unit, thereby ensuring unidirectional conveying of materials. The rotation axis of the rotating actuating component is perpendicular to the bottom surface of the conveying trough, and the actuating blades on the rotating actuating component are close to the bottom of the conveying trough, thereby enabling the bulk materials to be turned over and stirred and conveyed in small batches between two adjacent conveying troughs to reduce the phenomenon of bulk materials clumping.

[0025] 2. In this invention, the side walls of the input and output ends of the conveying trough are set as complementary arcs, and the output end of the upper-level conveying trough and the input end of the lower-level conveying trough are interlocked. That is, the overall structural frame of the conveying trough is designed as an interlocking hinged structure, which significantly reduces the spatial constraints and maximizes the allowable swing angle between units. During the swing of the conveying unit, the two adjacent conveying troughs can have a high rotation amplitude and degree of freedom. As a result, the flexible conveying device can rotate a large angle with only a small turning space during the turning process, which can be applied to environments with limited space, especially when recovering corner coal and coal pillars, and is particularly suitable for environments with limited working face space, thereby expanding the application range of the flexible conveying device.

[0026] 3. The integrated mining and conveying machine of this invention integrates a flexible bulk material conveying device with a crusher and a belt conveyor. It uses the agitator blades on the flexible bulk material conveying device to stir and decompose the coal, and transfers it in small batches between adjacent conveying troughs. The last conveying trough is also transferred to the belt conveyor in small batches, thereby reducing the problems of coal caking, stagnation, accumulation and blockage during the conveying process, and thus ensuring the stability of the coal conveying process. Attached Figure Description

[0027] Figure 1 This is a top-view perspective view of the flexible conveying device for bulk materials in this invention; Figure 2 This is a top-view perspective view of the conveying unit in this invention; Figure 3 This is a bottom-view perspective view of the conveying unit in this invention; Figure 4 This is a top view schematic diagram of the integrated tunneling and transportation coal mining machine of the present invention; Figure 5 This is a three-dimensional schematic diagram of the excavator from a first-person perspective in this invention; Figure 6 This is a three-dimensional schematic diagram of the excavator from a second perspective in this invention; Figure 7 This is a top-view perspective view of the flexible conveying device for bulk materials equipped with guide rails according to the present invention. Figure 8 This is a bottom-view perspective view of the flexible conveying device for bulk materials equipped with guide rails according to the present invention. Figure 9 This is a schematic diagram of the working state of the integrated tunneling and hauling coal mining machine in this invention when recovering coal pillars.

[0028] In the diagram: 10. Excavator; 11. Excavator body; 111. Excavator arm; 12. Excavating drum; 121. Upper drum; 122. Middle drum; 1221. Drum liner; 123. Lower drum; 124. Excavating teeth; 13. Scraper conveyor; 14. Discharge port; 15. Coal retaining plate; 16. Chassis; 20. Flexible bulk material conveying device; 21. Conveying unit; 211. Conveying trough; 2111. Notch; 212. Rotating actuating component; 2121. Actuating blade; 2122. Rotating shaft; 213. Connecting component; 2131. Hinge plug; 2132. Hinge socket; 214. Traveling wheel; 22. Guide rail; 30. Belt conveyor. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below through specific embodiments. Example 1

[0030] like Figure 1 , Figure 2 and Figure 3 As shown in the illustration, this embodiment provides a flexible conveying device for bulk materials, comprising multiple conveying units 21 with identical structures and sequentially hinged along the horizontal direction, thereby forming a serpentine structure that can swing horizontally. Each conveying unit 21 includes a conveying trough 211 and a rotating actuating element 212 installed within the conveying trough 211. Adjacent conveying troughs 211 are connected end to end, and the height of the output end of the conveying trough 211 in the previous stage conveying unit 21 is higher than the height of the input end of the output trough 211 in the next stage output unit 21, to form a backflow prevention structure.

[0031] The two side walls of the input end of each conveying trough 211 are set in an arc-shaped flared shape, while the two side walls of the output end of each conveying trough 211 are set in an arc-shaped constricted shape. This ensures that the shapes of the trough walls at the output end of the conveying trough in the previous conveying unit and the trough walls at the input end of the conveying trough in the next conveying unit are complementary and can interlock, serving as rotational guide surfaces during the oscillation of the conveying unit 211. This allows for a high rotational amplitude between adjacent conveying troughs 211, requiring only a small turning radius during the turning process. This makes the device suitable for small-scale tunneling faces such as corner coal recovery and coal pillar recovery, thus expanding its applicability to a certain extent. To accommodate the shape of the output end trough walls, the bottom of the output end of the conveying trough 211 is set in a circular shape, and this circular bottom is inclined and raised along the material conveying direction, so that the height of the bottom of the output end trough in the previous conveying unit 21 is higher than the height of the bottom of the input end trough in the next conveying unit 21, thereby achieving unidirectional material conveying. Meanwhile, an arc-shaped notch 2111 is opened at the edge of the circular trough bottom to prevent the circular trough bottom from interfering with the trough wall at the input end of the next-level conveying unit when turning.

[0032] A rotating actuating component 212 is disposed on the bottom of the output end of the conveying trough 211, with its rotation axis perpendicular to the bottom of the output end of the conveying trough. The rotating actuating component 212 has an overall impeller structure, including a rotating shaft 2122 located on the rotation axis and multiple arc-shaped actuating blades 2121 uniformly welded and fixed circumferentially along the rotating shaft 2122. The actuating blades 2121 are positioned close to the bottom of the output end of the conveying trough 211, with their distal ends extending towards the trough wall. During rotation, the actuating blades 2121 can push bulk materials in small batches from the output end of the conveying trough in the previous stage to the input end of the conveying trough in the next stage, thus preventing blockages and accumulations caused by conveying large amounts of material at once, ensuring the stability of the bulk material conveying process. During rotation, the actuating blades 2121 can also agitate and stir the bulk materials, preventing clumping and reducing stagnation, accumulation, and blockages during conveying. Each rotating actuator 212 is equipped with a rotary motor to provide rotational power for the actuating blade 2121.

[0033] Each conveying trough 211 has a connector 213 welded to its bottom for connecting two adjacent conveying units 21. The connector 213 includes a hinge plug 2131 and a hinge socket 2132 integrally formed and mounted at both ends of the bottom of the conveying trough 211. The hinge plug 2131 is arrow-shaped, with a hinge hole at the triangular tip for hinged connection with the hinge socket 2132 on an adjacent conveying trough 211 via a pin. The hinge socket 2132 is rectangular, with an internal groove adapted to the hinge plug 2131, and a hinge hole in the center of the groove for hinged connection with the hinge plug 2131 on another adjacent conveying trough 211 via a pin. Through the cooperation between the hinge plugs 2131 and hinge sockets 2132 on adjacent conveying troughs 211, this flexible bulk material conveying device can achieve steering by swinging, thus adapting to the complex and ever-changing conditions of underground tunnels.

[0034] The bottom of the conveying trough 211 is also equipped with traveling wheels 214. In actual application, each conveying unit 21 is equipped with a hydraulic motor to provide the traveling power for the traveling wheels 214. Example 2

[0035] like Figure 4As shown in the figure, this embodiment provides a coal mining machine that integrates tunneling and transportation, including a flexible bulk material conveying device 20 as in embodiment 1, a breaker 10 connected to the feed end of the flexible bulk material conveying device 20, and a belt conveyor 30 connected to the discharge end of the flexible bulk material conveying device 20. The breaker 10 excavates and initially crushes the coal and transmits the coal to the flexible bulk material conveying device 20. The flexible bulk material conveying device 20 is used to further crush and decompose the coal and transmit it to the belt conveyor 30. The belt conveyor 30 connects with the belt conveyor in the roadway to transport the coal out.

[0036] like Figure 5 and Figure 6 As shown, the excavator 10 includes an excavator body 11, an excavating drum 12 installed at the front end of the excavator 10, a scraper conveyor 13 installed inside the excavator 10, and a discharge port 14 installed at the rear end of the excavator. The excavator body 11 is equipped with a motor, an electrical control system, and a hydraulic control system, providing power and control for the entire excavator 10. The excavating drum 12 includes an upper drum 121, a middle drum 122, and a lower drum 123. The surfaces of all three drums are evenly distributed with pointed digging teeth 124. The upper drum 121 is hinged to a digging arm 111 on the excavator body 11, and its digging position is adjusted by the up-and-down swing of the digging arm 111. The middle drum 122 is installed at the middle of the front end of the excavator body 11 and overlaps with the feed port of the scraper conveyor 13. An arc-shaped cylindrical liner 1221 for carrying coal is provided at the bottom of the middle drum 122. The lower drum 123 is located below the middle drum 122. Figure 5 and Figure 6 From the perspective of the upper drum 121, it rotates clockwise to initially crush the coal. The lower drum 123 rotates counterclockwise to crush the coal and transfer it to the cylinder liner 1221. The middle drum 122 rotates clockwise to crush the coal again and transfer it to the scraper conveyor 13. The discharge position of the scraper conveyor 13 overlaps with the discharge port 14. The tail of the discharge port 14 is inclined downward to facilitate the transfer of coal through the discharge port 14 to the bulk material flexible conveying device 20.

[0037] Furthermore, a tracked chassis 16 is installed at the bottom of the main body 11 of the tunnel boring machine, which facilitates the flexible adjustment of the excavation area of ​​the tunnel boring machine 10 within the fully mechanized mining face. At the same time, compared with a wheeled chassis, the tracked chassis 16 can increase the contact area with the ground, thereby improving the stability of the entire tunnel boring machine 10 and making it more adaptable to the complex road conditions of underground tunnels.

[0038] Furthermore, an arc-shaped coal baffle plate 15 is provided on the periphery of the lower drum 123. The coal baffle plate 15 is fixedly connected to the drum liner 1221. During the coal crushing process of the lower drum 123, the coal baffle plate 15 can reduce coal splashing, thereby protecting the chassis 16.

[0039] Furthermore, a camera is installed at the front end of the excavator body 11 for real-time monitoring of the coal mining process. Operators can remotely monitor and control the direction of travel and excavation of the excavator 10 via remote control, thereby achieving automated coal mining and reducing the probability of safety accidents.

[0040] Furthermore, such as Figure 7 and Figure 8 As shown, the flexible bulk material conveying device 20 includes a guide rail 22 for guiding the conveying unit 21 to turn. The guide rail 22 has an L-shaped cross-section and is placed at the corner of the tunnel. When the flexible bulk material conveying device 20 follows the excavator 10 to turn, it not only guides the inner traveling wheels 214, but also prevents the flexible bulk material conveying device 20 from colliding with the tunnel sidewall during the turning process.

[0041] The belt conveyor 30 has tires at its bottom and is equipped with a motor inside. The motor drives the tires to rotate, thereby enabling the belt conveyor 30 to move forward and backward. In practical applications, when the tail of the flexible bulk material conveyor 20 moves to a bend in the roadway, while the excavator 10 still needs to move forward, the number of conveying units 21 can be increased to extend the conveying length of the flexible bulk material conveyor 20, preventing the belt conveyor 30 from getting stuck at the bend in the roadway and causing roadway blockage.

[0042] like Figure 9 As shown, the coal pillar area in the roadway is affected by the surrounding goaf, resulting in concentrated stress in the coal pillar, which narrows and lowers the roadway space. The existing flexible belt conveyor's articulated joints can only achieve a small turning angle, and when turning is required, a large turning space is often needed to complete the turn, which is obviously unsuitable for coal pillar recovery. In this embodiment, the integrated tunneling and hauling coal mining machine uses the excavator 10 to first break the coal pillar, and then transports it through the bulk material flexible conveyor 20, and finally transfers it to the belt conveyor in the roadway via the belt transfer machine 30 for delivery. Because the two adjacent conveying troughs in the bulk material flexible conveyor 20 have a high rotation range and degree of freedom, the flexible conveyor only needs a small turning space to rotate a large angle during the turning process, thus making it applicable to the confined environment of the coal pillar area in the roadway.

[0043] The working principle of the integrated tunneling and hauling coal mining machine in this embodiment is as follows: First, the tunneling machine 10 moves to the working area via the tracked chassis 16. The upper drum 121 of the tunneling drum 12 tunnels the coal wall. The lower drum 123 rotates to transfer the tunneled coal to the cylinder liner 1221 at the bottom of the middle drum 122. The middle drum 122 rotates to further crush the coal and transfer it to the scraper conveyor 13. The coal flows through the scraper conveyor 13 and the discharge port 14 to the bulk material flexible transport device 20. The rotating actuating blades 2121 on the rotating actuating component 212 can further crush and decompose the coal by rotation, and transfer the coal between adjacent conveying units 21 in small batches. The actuating blades 2121 of the last conveying unit 21 transfer the coal to the belt conveyor 30. The belt conveyor 30 finally transports the coal out through the belt conveyor in the roadway. The excavator 10 is equipped with a tracked chassis 16 at its bottom, the bulk material flexible transport device 20 is equipped with wheels 214 at its bottom, and the belt conveyor 30 is equipped with tires at its bottom. All three can move synchronously as the coal mining area advances.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A flexible conveying device for bulk materials, characterized in that: It includes multiple conveying units (21) with the same structure, and two adjacent conveying units (21) are horizontally hinged so that the conveying units (21) as a whole form a serpentine structure that can swing horizontally; The conveying unit (21) includes a conveying trough (211) and a rotating actuating element (212) installed in the conveying trough (211). The conveying troughs (211) of two adjacent conveying units (21) are connected end to end. The rotation axis of the rotating actuating component (212) is perpendicular to the bottom surface of the conveying trough (211). The actuating blades (2121) on the rotating actuating component (212) are set close to the bottom of the conveying trough (211) to push the bulk material from the output end of the conveying trough in the previous conveying unit to the input end of the conveying trough in the next conveying unit and to agitate and stir the bulk material.

2. The flexible conveying device for bulk materials according to claim 1, characterized in that: The height of the output end of the conveying trough (211) in the upper-level conveying unit (21) is higher than the height of the input end of the conveying trough (211) in the lower-level conveying unit (21) to form a backstop structure.

3. The flexible conveying device for bulk materials according to claim 1 or 2, characterized in that: The two side walls of the input end of the conveying trough (211) are set in an arc-shaped flared shape, and the two side walls of the output end of the conveying trough (211) are set in an arc-shaped constricted shape. The shape of the trough wall at the output end of the conveying trough in the upper-level conveying unit and the trough wall at the input end of the conveying trough in the lower-level conveying unit are complementary and can interlock with each other so that they can serve as rotational guide surfaces for each other during the swinging process of the conveying unit (21).

4. The flexible conveying device for bulk materials according to claim 3, characterized in that: The bottom of the output end of the conveying trough (211) is a circular bottom adapted to the trough wall. The circular bottom is tilted and raised along the material conveying direction so that the height of the bottom of the output end in the same conveying unit (21) is higher than the height of the bottom of the input end. The edge of the circular bottom is opened with a notch (2111) to prevent the circular bottom from interfering with the input end trough wall of the next level conveying unit when turning. The rotating actuating element (212) is synchronously and obliquely installed at the bottom of the circular groove, and the distal end of the actuating blade (2121) extends toward the groove wall.

5. The flexible conveying device for bulk materials according to claim 1 or 2, characterized in that: Each of the conveying troughs (211) is equipped with a wheel (214) at its bottom.

6. The flexible conveying device for bulk materials according to claim 1 or 2, characterized in that: Each conveying trough (211) has a connector (213) at its bottom for connecting two adjacent conveying units (21). The connector (213) includes a hinge plug (2131) and a hinge socket (2132) installed at both ends of the bottom of the conveying trough (211). The hinge plug (2131) is used to hinge with the hinge socket (2132) on one adjacent conveying trough (211), and the hinge socket (2132) is used to hinge with the hinge plug (2131) on another adjacent conveying trough (211).

7. A coal mining machine integrating tunneling and hauling, characterized in that: The device includes a flexible conveyor for bulk materials (20) as described in any one of claims 1-6, a breaker (10) connected to the feed end of the flexible conveyor for bulk materials (20), and a belt conveyor (30) connected to the discharge end of the flexible conveyor for bulk materials (20).

8. The integrated tunneling and hauling coal mining machine according to claim 7, characterized in that: The flexible conveying device (20) for bulk materials includes a guide rail (22) for guiding the conveying unit (21) to turn.

9. The integrated tunneling and hauling coal mining machine according to claim 7, characterized in that: The excavator (10) includes an excavator body (11), an excavating drum (12) located at the front end of the excavator (10), a scraper conveyor (13) located inside the excavator (10), and a discharge port (14) located at the tail end of the excavator (10). The discharge port (14) is connected to the feed end of the bulk material flexible conveying device (20).

10. The integrated tunneling and hauling coal mining machine according to claim 9, characterized in that: The excavating drum (12) includes an upper drum (121), a middle drum (122), and a lower drum (123). Digging teeth (124) are provided on the upper drum (121), the middle drum (122), and the lower drum (123). The upper drum (121) excavates the coal wall by rotating. The lower drum (123) transfers the coal to the middle drum (122) by rotating. The bottom of the middle drum (122) is provided with a cylinder liner (1221) for carrying the coal. The middle drum (122) further crushes the coal by rotating and transfers it to the scraper conveyor (13).

Images