Conveying device for underground coal mine material barrel

Abstract

The invention relates to a conveying device for underground coal mine material barrels, and belongs to the technical field of underground conveying. The conveying device is arranged in a bent roadway of an underground coal mine and is composed of conveying units which are sequentially arranged and connected, the conveying device comprises a linear conveying part and a curve conveying part, the conveying units of the linear conveying part are arranged along a straight line, and the conveying units of the curve conveying part are arranged along an arc line; the conveying unit comprises a supporting frame, a mounting frame is fixedly arranged at the upper end of the supporting frame, conveying rollers are arranged on the mounting frame, the upper sides of the two ends of the mounting frame are each provided with a guide mechanism in a sliding mode, and the two ends of the mounting frame are each provided with a connecting mechanism. The two groups of connecting mechanisms on the mounting rack of the conveying unit on the front side are respectively connected with the two groups of connecting mechanisms on the mounting rack of the conveying unit on the rear side; the problem that an existing conveying belt cannot adapt to an underground bent roadway is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of underground transportation, and in particular relates to a conveying device for material barrels in coal mines. Background Art

[0002] When working underground in a coal mine, it is necessary to send barrels filled with materials underground and send the empty barrels back to the surface. At this time, it is necessary to arrange a conveying device in the underground tunnel to transport the barrels. Then, since the underground tunnel is not straight, but a combination of straight and curved tunnels, the existing conveyor belt cannot adapt to this curved tunnel, so a new conveying device needs to be designed to adapt to this curved tunnel. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a conveying device for material buckets in coal mines, thereby solving the problem that the current conveyor belt cannot adapt to the curved tunnels in the mine.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0005] A conveying device for material barrels in a coal mine is arranged in a curved tunnel in the coal mine, and is composed of conveying units arranged in sequence. The conveying device includes a straight conveying part and a curved conveying part. The conveying units of the straight conveying part are arranged along a straight line, and the conveying units of the curved conveying part are arranged along an arc line; the conveying unit includes a support frame, a mounting frame is fixedly provided on the upper end of the support frame, a conveying roller is provided on the mounting frame, a group of guide mechanisms are slidably provided on the upper sides of both ends of the mounting frame, a group of connecting mechanisms are respectively provided on both ends of the mounting frame, and the two groups of connecting mechanisms on the mounting frame of the conveying unit on the front side are respectively connected with the two groups of connecting mechanisms on the mounting frame of the conveying unit on the rear side.

[0006] Furthermore, the conveying rollers of the conveying unit of the straight conveying part are cylindrical rollers, and the conveying rollers of the conveying unit of the curved conveying part are conical rollers.

[0007] Furthermore, the support frame includes a fixed frame and a support leg, and the fixed frame includes two vertical fixed rods that are symmetrical on the left and right, and the two fixed rods are fixedly connected by two upper and lower horizontal connecting rods; a vertical supporting leg is slidably inserted into the lower end of each fixed rod, and a locking bolt is screwed on the side wall of the fixed rod, and the tip of the locking bolt faces the outer wall of the supporting leg.

[0008] Furthermore, a universal wheel seat is rotatably provided at the lower end of each supporting leg, a roller is rotatably provided on the universal wheel seat, the roller is in contact with the ground, and a threaded hole that passes through the upper and lower parts is fixedly provided on each universal wheel seat, a vertical limit nail is screwed inside the threaded hole, a spike is provided at the lower end of the limit nail, and a knob is fixedly provided at the upper end of the limit nail.

[0009] Furthermore, the mounting frame includes a horizontal plate, an outer vertical plate, and an inner vertical plate. The left and right ends of the lower end surface of the horizontal plate are respectively fixedly connected to the upper ends of the two fixed rods of the support frame; an outer vertical plate and an inner vertical plate are respectively fixedly arranged at the left and right ends of the upper end surface of the horizontal plate, the inner vertical plate is located on the inner side of the outer vertical plate, and the inner vertical plate and the outer vertical plate remain parallel; the two ends of the conveying roller are detachably arranged on the two inner vertical plates.

[0010] Furthermore, an infrared sensor is fixedly arranged at the middle part of the rear edge of the lower end surface of the horizontal plate of the mounting frame through the mounting plate, and the detection direction of the infrared sensor is vertically upward.

[0011] Furthermore, a group of the guide mechanisms described above are arranged between the outer vertical plate and the inner vertical plate on the same side, and the guide mechanisms include a sliding seat, a guide roller, a fixed block, and an electric push rod; a sliding block is fixedly arranged at the upper end of the inner vertical plate respectively; the sliding seat is an inverted T-shaped structure, including a horizontal section and a vertical section, the horizontal section is located at the upper end of the inner vertical plate, and a slide groove extending left and right is arranged on the lower end surface of the horizontal section, and the fixed block is slidably engaged in the corresponding slide groove; the vertical section is arranged on the side of the upper end surface of the horizontal section close to the conveying roller, and two front and rear vertical guide rollers are rotatably arranged on the side of the vertical section close to the conveying roller; an electric push rod is arranged between the upper end of the outer vertical plate and the sliding seat, one end of the cylinder bottom of the electric push rod is hinged to the upper end of the outer vertical plate, and one end of the piston rod of the electric push rod is hinged to the upper end of the vertical section of the sliding seat.

[0012] Furthermore, a group of connecting mechanisms are respectively arranged between the outer vertical plate and the inner vertical plate on the same side, and the connecting mechanisms include a ball seat, a connecting ball, a first connecting rod, a second connecting rod, a third connecting rod, and a fourth connecting rod; two front and rear ball seats are respectively fixedly arranged between the inner vertical plate and the outer vertical plate on the same side of each mounting frame, and the ball seat is fixedly arranged between the inner vertical plate and the outer vertical plate through two left and right mounting rods, and openings are arranged at the front and rear ends of the ball seat; a connecting ball is respectively arranged to roll inside each ball seat, and an articulated seat is fixedly arranged on each connecting ball; the articulated seat on the front connecting ball extends out from the front opening of the front ball seat, and the articulated seat on the rear connecting ball extends out from the rear opening of the rear ball seat; the first connecting rod and the second connecting rod are respectively articulated on the articulated seat of the front connecting ball, and the third connecting rod and the fourth connecting rod are respectively articulated on the articulated seat of the rear connecting ball, and the lengths of the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod are kept equal.

[0013] Furthermore, when the front and rear conveying units are connected to each other, the two groups of connecting mechanisms on the left side and the two groups of connecting mechanisms on the right side of the front and rear conveying units remain connected, that is, the first connecting rod of the rear conveying unit is hinged to the third connecting rod of the front conveying unit, and the second connecting rod of the rear conveying unit is hinged to the fourth connecting rod of the front conveying unit, and the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod form a diamond-shaped connecting rod assembly; by controlling the angle of the diamond-shaped connecting rod assembly, the spacing between the front and rear conveying units can be adjusted.

[0014] Furthermore, when the conveying units of the front and rear curved conveying parts are connected to each other, or the conveying unit of the curved conveying part is connected to the conveying unit of the straight conveying part, the angles of the two diamond-shaped connecting rod assemblies on the left and right are different, so that the spacing between the two sides of the two conveying units is different, and the angle between the first connecting rod and the second connecting rod located on the inner side of the curve is greater than the angle between the first connecting rod and the second connecting rod located on the outer side of the curve.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: The present invention provides a conveying device for material barrels in coal mines, comprising a connected straight conveying part and a curved conveying part, wherein the curved conveying part can adapt to the curved part of the underground tunnel, so that the material can be conveyed in the curved tunnel; the guiding mechanisms on both sides can not only guide the conveying of the material barrel, but also straighten the stuck material barrel, so that the material barrel can be freed and continue to be conveyed; by setting a connecting mechanism, two adjacent conveying units can be connected, and not only the distance between the two conveying units can be adjusted, but also the angle between the two conveying units can be adjusted, so that the conveying unit of the curved conveying part can adapt to the curved tunnel; by setting an infrared sensor, not only the material barrel can be conveyed by rotating a limited number of conveying rollers to save energy, but also the stuck material barrel can be discovered in time, so that the stuck material barrel can be freed in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a top view of the present invention as a whole; Figure 3 yes Figure 1 A local enlarged schematic diagram of the middle A; Figure 4 yes Figure 1 A partial enlarged schematic diagram of point B in the middle; Figure 5 yes Figure 2 A partial enlarged schematic diagram of point C in the middle; Figure 6 is a three-dimensional schematic diagram of a conveying unit; Figure 7 is a front view of the conveying unit; Figure 8 It is a structural schematic diagram of the guide mechanism; Fig. 9 It is a front view of the conveying unit of the linear conveying part; Fig.10 It is a schematic diagram of the connection of two conveying units; Fig.11 It is a connection diagram of two connection mechanisms; Among them, 1 is a straight conveying part, 2 is a curved conveying part, 3 is a conveying unit, 4 is a supporting frame, 5 is a mounting frame, 6 is a guiding mechanism, 7 is a connecting mechanism, 8 is a conveying roller, 9 is a fixing frame, 10 is a supporting leg, 11 is a fixing rod, 12 is a connecting rod, 13 is a locking bolt, 14 is a universal wheel seat, 15 is a roller, 16 is a limiting nail, 17 is a knob, 18 is a horizontal plate, 19 is an outer vertical plate, 20 is an inner vertical plate, 21 is an infrared sensor, 22 is a sliding seat, 23 is a guide roller, 24 is a fixing block, 25 is an electric push rod, 26 is a ball seat, 27 is a connecting ball, 28 is a first connecting rod, 29 is a second connecting rod, 30 is a third connecting rod, and 31 is a fourth connecting rod. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0018] like Figure 1 As shown in FIG. 11 , the present invention provides a conveying device for material barrels in a coal mine, which is arranged in a curved tunnel in the coal mine and is composed of conveying units 3 arranged in sequence. The conveying device includes a straight conveying part 1 and a curved conveying part 2. The conveying units 3 of the straight conveying part 1 are arranged along a straight line, and the conveying units 3 of the curved conveying part 2 are arranged along an arc line; the conveying unit 3 includes a support frame 4, a mounting frame 5 is fixedly provided on the upper end of the support frame 4, a conveying roller 8 is provided on the mounting frame 5, a group of guide mechanisms 6 are slidably provided on the upper sides of both ends of the mounting frame 5, a group of connecting mechanisms 7 are respectively provided on both ends of the mounting frame 5, and the two groups of connecting mechanisms 7 on the mounting frame 5 of the conveying unit 3 on the front side are respectively connected to the two groups of connecting mechanisms 7 on the mounting frame 5 of the conveying unit 3 on the rear side.

[0019] The conveying rollers 8 of the conveying unit 3 of the straight conveying part 1 are cylindrical rollers, and the conveying rollers 8 of the conveying unit 3 of the curved conveying part 2 are conical rollers. All the conveying rollers 8 are electric rollers, which can realize forward and reverse rotation by powering on.

[0020] The support frame 4 includes a fixing frame 9 and a supporting leg 10. The fixing frame 9 includes two vertical fixing rods 11 that are symmetrical on both sides. The two fixing rods 11 are fixedly connected by two upper and lower horizontal connecting rods 12. A vertical supporting leg 10 is slidably inserted into the lower end of each fixing rod 11. A locking bolt 13 is screwed on the side wall of the fixing rod 11, and the tip of the locking bolt 13 faces the outer wall of the supporting leg 10. When the locking bolt 13 is loosened, the supporting leg 10 can slide inside the fixing rod 11, so that the height of the supporting leg 10 can be adjusted. When the locking bolt 13 is tightened, the supporting leg 10 and the fixing rod 11 are locked with each other, and the height of the supporting leg 10 is fixed. By adjusting the height of the supporting leg 10, not only the overall height of the mounting frame 5 can be adjusted, but also the height of the two supporting legs 10 can be adjusted differently to adapt to uneven ground, so that the mounting frame 5 remains horizontal.

[0021] A universal wheel seat 14 is rotatably provided at the lower end of each supporting leg 10. The universal wheel seat 14 can rotate arbitrarily in the horizontal direction. A roller 15 is rotatably provided on the universal wheel seat 14. The roller 15 contacts the ground, and the conveying unit 3 can be moved as a whole through the roller 15.

[0022] A threaded hole that passes through from top to bottom is fixedly provided on each universal wheel seat 14, a vertical limit pin 16 is screwed inside the threaded hole, a spike is provided at the lower end of the limit pin 16, and a knob 17 is fixedly provided at the upper end of the limit pin 16. When the position of the support frame 4 is fixed, the limit pin 16 is controlled to rotate by turning the knob 17, and since the limit pin 16 is screwed to the universal wheel seat 14, the limit pin 16 is controlled to descend until the spike at the lower end of the limit pin 16 is completely inserted below the ground, so that the lower ends of the two support legs 10 of the support frame 4 are fixed, so that the entire conveying unit 3 is fixed.

[0023] The mounting frame 5 includes a horizontal plate 18, an outer vertical plate 19, and an inner vertical plate 20. The horizontal plate 18 is a horizontally arranged square plate structure. The left and right ends of the lower end surface of the horizontal plate 18 are respectively fixedly connected to the upper ends of the two fixing rods 11 of the support frame 4; an outer vertical plate 19 and an inner vertical plate 20 are respectively fixedly arranged at the left and right ends of the upper end surface of the horizontal plate 18, and the inner vertical plate 20 is located on the inner side of the outer vertical plate 19, and the inner vertical plate 20 and the outer vertical plate 19 remain parallel.

[0024] An infrared sensor 21 is fixedly arranged at the middle of the rear edge of the lower end surface of the horizontal plate 18 of the mounting frame 5 through the mounting plate, and the detection direction of the infrared sensor 21 is vertically upward.

[0025] Both ends of the conveying roller 8 are detachably disposed on the two inner vertical plates 20 , and the conveying roller 8 rotates between the two inner vertical plates 20 .

[0026] A group of the guide mechanism 6 is arranged between the outer vertical plate 19 and the inner vertical plate 20 on the same side, and the guide mechanism 6 includes a sliding seat 22, a guide roller 23, a fixed block 24, and an electric push rod 25. A sliding block is fixedly arranged at the upper end of the inner vertical plate 20, and the sliding block is extended along the left and right horizontal directions. The sliding seat 22 is an inverted T-shaped structure, including a horizontal section and a vertical section. The horizontal section is a horizontally arranged square plate-like structure. The horizontal section is located at the upper end of the inner vertical plate 20. A sliding groove extending left and right is arranged on the lower end surface of the horizontal section. The fixed block 24 is slidably engaged in the corresponding sliding groove. The vertical section is arranged on the side of the upper end surface of the horizontal section close to the conveying roller 8. The vertical section is parallel to the inner vertical plate 20. Two front and rear vertical guide rollers 23 are rotatably arranged on the side of the vertical section close to the conveying roller 8. An electric push rod 25 is arranged between the upper end of the outer vertical plate 19 and the sliding seat 22, and one end of the cylinder bottom of the electric push rod 25 is hinged to the upper end of the outer vertical plate 19, and one end of the piston rod of the electric push rod 25 is hinged to the upper end of the vertical section of the sliding seat 22. When the piston rod of the electric push rod 25 is extended, the sliding seat 22 is driven to slide toward the side close to the conveying roller 8; when the piston rod of the electric push rod 25 is retracted, the sliding seat 22 is driven to slide toward the side away from the conveying roller 8.

[0027] A group of connecting mechanisms 7 are respectively arranged between the outer vertical plate 19 and the inner vertical plate 20 on the same side, and the connecting mechanisms 7 include a ball seat 26, a connecting ball 27, a first connecting rod 28, a second connecting rod 29, a third connecting rod 30, and a fourth connecting rod 31. Two front and rear ball seats 26 are respectively fixedly arranged between the inner vertical plate 20 and the outer vertical plate 19 on the same side of each mounting frame 5. The ball seat 26 is fixedly arranged between the inner vertical plate 20 and the outer vertical plate 19 through two left and right mounting rods, and openings are arranged at the front and rear ends of the ball seat 26. A connecting ball 27 is respectively arranged in a rolling manner inside each ball seat 26, and a hinge seat is fixedly arranged on each connecting ball 27. The hinge seat on the front connecting ball 27 extends from the front opening of the front ball seat 26, and the hinge seat on the rear connecting ball 27 extends from the rear opening of the rear ball seat 26. The first connecting rod 28 and the second connecting rod 29 are respectively hinged on the hinge seats of the connecting ball 27 on the front side, and the third connecting rod 30 and the fourth connecting rod 31 are respectively hinged on the hinge seats of the connecting ball 27 on the rear side. The lengths of the first connecting rod 28, the second connecting rod 29, the third connecting rod 30, and the fourth connecting rod 31 remain equal.

[0028] When the front and rear conveying units 3 are connected to each other, the two groups of connecting mechanisms 7 on the left side and the two groups of connecting mechanisms 7 on the right side of the front and rear conveying units 3 are kept connected, that is, the first connecting rod 28 of the conveying unit 3 on the rear side is hinged with the third connecting rod 30 of the conveying unit 3 on the front side, and the second connecting rod 29 of the conveying unit 3 on the rear side is hinged with the fourth connecting rod 31 of the conveying unit 3 on the front side, and the first connecting rod 28, the second connecting rod 29, the third connecting rod 30, and the fourth connecting rod 31 form a rhombus-shaped connecting rod assembly. By controlling the angle of the rhombus-shaped connecting rod assembly, the spacing between the front and rear conveying units 3 can be adjusted.

[0029] When the conveying units 3 of the front and rear straight conveying parts 1 are connected to each other, the left and right diamond-shaped connecting rod assemblies remain corresponding, that is, the angles of the diamond-shaped connecting rod assemblies remain equal. At this time, the distance between the left sides of the front and rear conveying units 3 remains equal to the distance between the right sides, thereby ensuring that the straight conveying parts 1 are arranged and extended along the front and rear straight direction.

[0030] When the conveying units 3 of the front and rear curved conveying parts 2 are connected to each other, or the conveying unit 3 of the curved conveying part 2 is connected to the conveying unit 3 of the straight conveying part 1, the angles of the two diamond-shaped connecting rod assemblies on the left and right are different, so that the distances between the two sides of the two conveying units 3 are different, and the angle between the first connecting rod 28 and the second connecting rod 29 on the inner side of the curve is greater than the angle between the first connecting rod 28 and the second connecting rod 29 on the outer side of the curve.

[0031] The assembly process of the present invention is: When it is necessary to arrange a conveying device underground in a coal mine, each conveying unit 3 is first transported to the inside of a tunnel underground in the coal mine, and then the connecting mechanism 7 of the two adjacent conveying units 3 at the front and rear is connected, that is, the first connecting rod 28 of the conveying unit 3 at the rear is hinged with the third connecting rod 30 of the conveying unit 3 at the front, and the second connecting rod 29 of the conveying unit 3 at the rear is hinged with the fourth connecting rod 31 of the conveying unit 3 at the front.

[0032] Then, the distance between two adjacent conveying units 3 in different areas is adjusted. When located inside a straight lane, the distance between the left and right sides of the front and rear conveying units 3 is ensured to be equal; when located inside a curved lane, the angles of the left and right diamond-shaped connecting rod assemblies are adjusted independently to ensure that the angle between the front and rear conveying units 3 is adapted to the curvature of the lane.

[0033] According to the material barrels of different sizes, the distance between the two adjacent conveying units 3 can be adjusted, and the number of conveying units 3 can be reduced under the premise of ensuring that the material barrels can be conveyed smoothly.

[0034] After the position and angle of the conveying unit 3 are adjusted, the conveying roller 8 is installed on the mounting frame 5 of the conveying unit 3. The conveying roller 8 with a cylindrical structure is installed on the conveying unit 3 located inside the curved lane, and the conveying roller 8 with a conical structure is installed on the conveying unit 3 located inside the straight lane.

[0035] Then, the height of the two supporting legs 10 of each conveying unit 3 is independently adjusted so that the supporting legs 10 are adapted to the terrain, ensuring that the conveying rollers 8 of all conveying units 3 are on a smooth conveying surface.

[0036] Finally, the two limiting nails 16 on each conveying unit 3 are rotated so that the spikes at the lower ends of the limiting nails 16 are inserted below the ground, thereby fixing each conveying unit 3 to ensure that the conveying unit 3 will not shake during the process of conveying the material barrel.

[0037] The conveying principle of the present invention is: When the material barrel needs to be transported, the material barrel is placed on the frontmost conveying unit 3. The infrared sensor 21 on the frontmost conveying unit 3 detects that a material barrel is placed on the upper side and transmits a signal to the controller. The controller controls the frontmost conveying roller 8 and several conveying rollers 8 on the rear side to start rotating. The rotating conveying rollers 8 drive the material barrel to move toward the rear end of the conveying device.

[0038] When the material barrel begins to reach one of the conveying units 3, the infrared sensor 21 on the current conveying unit 3 detects the appearance of the material barrel, and then controls several conveying rollers 8 on the rear side to start rotating, ensuring that the material barrel can continue to move backward. After the infrared sensor 21 on the current conveying unit 3 detects that the material barrel has passed the current conveying unit 3, it will send a signal to the controller, and the controller controls the conveying rollers 8 on the front side to stop rotating. The control is continuously performed in sequence to ensure that the material barrel can move backward smoothly. During the movement of the material barrel, only a few conveying rollers 8 are always rotating, thereby saving energy. In this way, when only a few material barrels are transported, it is not necessary to rotate all the conveying rollers 8.

[0039] During the movement of the material barrel, the material barrel is guided by the guide wheels on the left and right sides of the conveying unit 3 to ensure that the material barrel can move smoothly to the rear side until the material barrel is transported underground.

[0040] When the material barrel passes through the conveying unit 3 of the curved conveying part 2, since the conveying unit 3 of the curved conveying part 2 is equipped with a conical conveying roller 8, the rotation speed of the conical conveying roller 8 remains constant when conveying the material barrel. The linear speed of the large end of the conveying roller 8 is greater than the linear speed of the small end, and the moving speed of the outer end of the material barrel is faster than the moving speed of the inner end, thereby ensuring that the material barrel can turn smoothly and be conveyed along the circular arc trajectory of the curved conveying part 2.

[0041] Since the material barrel is easily stuck due to unexpected circumstances when passing through the conveying unit 3 of the curved conveying part 2, when the material barrel is stuck, the material barrel covers the infrared sensor 21 of the current conveying unit 3 for a long time, and the infrared sensor 21 detects that the material barrel is stuck at the current position, and transmits the signal to the controller, and the controller controls the guide mechanism 6 on the several conveying units 3 adjacent to the front and back of the current conveying unit 3 to act, and the piston rod of the electric push rod 25 extends, so that the sliding seats 22 on both sides of the conveying unit 3 are close to each other, and the two sliding seats 22 close to each other push the material barrel, so that the material barrel is straightened and the normal conveying angle is restored. Then the controller controls the piston rod of the electric push rod 25 to retract, and the sliding seats 22 on both sides of the conveying unit 3 move away from each other again until the initial spacing is restored.

[0042] When it is necessary to transport the empty barrels underground to the surface, it is only necessary to adjust the entire conveying device to the reverse conveying state, and then place the empty barrels on the conveying unit 3 at the rear end. Similar to the above-mentioned conveying principle, the empty barrels can be transported to the surface.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A conveying device for material barrels in coal mines, characterized in that: The invention is arranged in a curved tunnel in a coal mine, and is composed of conveying units (3) arranged in sequence. The conveying device comprises a straight conveying part (1) and a curved conveying part (2). The conveying units (3) of the straight conveying part (1) are arranged along a straight line, and the conveying units (3) of the curved conveying part (2) are arranged along an arc line. The conveying unit (3) comprises a support frame (4). A mounting frame (5) is fixedly arranged on the upper end of the support frame (4). A conveying roller (8) is arranged on the mounting frame (5). A group of guide mechanisms (6) are slidably arranged on the upper sides of both ends of the mounting frame (5). A group of connecting mechanisms (7) are respectively arranged on both ends of the mounting frame (5). The two groups of connecting mechanisms (7) on the mounting frame (5) of the conveying unit (3) on the front side are respectively connected to the two groups of connecting mechanisms (7) on the mounting frame (5) of the conveying unit (3) on the rear side.

2. The conveying device for material buckets in underground coal mines according to claim 1, characterized in that: The conveying roller (8) of the conveying unit (3) of the straight conveying part (1) is a cylindrical roller, and the conveying roller (8) of the conveying unit (3) of the curved conveying part (2) is a conical roller.

3. The conveying device for material buckets in underground coal mines according to claim 1, characterized in that: The support frame (4) comprises a fixing frame (9) and a supporting leg (10), wherein the fixing frame (9) comprises two vertical fixing rods (11) which are symmetrical with each other, and the two fixing rods (11) are fixedly connected to each other via two upper and lower horizontal connecting rods (12); a vertical supporting leg (10) is slidably inserted into the lower end of each fixing rod (11), and a locking bolt (13) is screwed onto the side wall of the fixing rod (11), with the tip of the locking bolt (13) facing the outer wall of the supporting leg (10).

4. The conveying device for material buckets in underground coal mines according to claim 3, characterized in that: A universal wheel seat (14) is rotatably provided at the lower end of each supporting leg (10), a roller (15) is rotatably provided on the universal wheel seat (14), the roller (15) is in contact with the ground, a threaded hole extending vertically through each universal wheel seat (14) is fixedly provided, a vertical limiting nail (16) is screwed inside the threaded hole, a spike is provided at the lower end of the limiting nail (16), and a knob (17) is fixedly provided at the upper end of the limiting nail (16).

5. The conveying device for material buckets in underground coal mines according to claim 3, characterized in that: The mounting frame (5) comprises a horizontal plate (18), an outer vertical plate (19), and an inner vertical plate (20); the left and right ends of the lower end surface of the horizontal plate (18) are respectively fixedly connected to the upper ends of two fixing rods (11) of the support frame (4); an outer vertical plate (19) and an inner vertical plate (20) are respectively fixedly arranged at the left and right ends of the upper end surface of the horizontal plate (18); the inner vertical plate (20) is located on the inner side of the outer vertical plate (19), and the inner vertical plate (20) and the outer vertical plate (19) remain parallel; the two ends of the conveying roller (8) are detachably arranged on the two inner vertical plates (20).

6. The conveying device for material buckets in underground coal mines according to claim 5, characterized in that: An infrared sensor (21) is fixedly arranged at the middle of the rear edge of the lower end surface of the horizontal plate (18) of the mounting frame (5) via the mounting plate, and the detection direction of the infrared sensor (21) is vertically upward.

7. The conveying device for material buckets in underground coal mines according to claim 5, characterized in that: A group of guide mechanisms (6) are arranged between the outer vertical plate (19) and the inner vertical plate (20) on the same side, and the guide mechanism (6) comprises a sliding seat (22), a guide roller (23), a fixed block (24), and an electric push rod (25); a sliding block is fixedly arranged at the upper end of each inner vertical plate (20); the sliding seat (22) is an inverted T-shaped structure, comprising a horizontal section and a vertical section, the horizontal section is located at the upper end of the inner vertical plate (20), and a sliding groove extending left and right is arranged on the lower end surface of the horizontal section. The fixed block (24) is slidably engaged in the corresponding slide groove; the vertical section is arranged on the side of the upper end surface of the horizontal section close to the conveying roller (8), and two front and rear vertical guide rollers (23) are rotatably arranged on the side of the vertical section close to the conveying roller (8); an electric push rod (25) is arranged between the upper end of the outer vertical plate (19) and the sliding seat (22), one end of the cylinder bottom of the electric push rod (25) is hinged to the upper end of the outer vertical plate (19), and one end of the piston rod of the electric push rod (25) is hinged to the upper end of the vertical section of the sliding seat (22).

8. The conveying device for material buckets in underground coal mines according to claim 5, characterized in that: A group of connecting mechanisms (7) are respectively arranged between the outer vertical plate (19) and the inner vertical plate (20) on the same side, and the connecting mechanisms (7) include a ball seat (26), a connecting ball (27), a first connecting rod (28), a second connecting rod (29), a third connecting rod (30), and a fourth connecting rod (31); two front and rear ball seats (26) are respectively fixedly arranged between the inner vertical plate (20) and the outer vertical plate (19) on the same side of each mounting frame (5), and the ball seat (26) is fixedly arranged between the inner vertical plate (20) and the outer vertical plate (19) through two left and right mounting rods, and the front and rear ends of the ball seat (26) are provided with openings; a portion of each ball seat (26) is provided inside the ball seat (26). A connecting ball (27) is provided for each rolling bearing, and a hinge seat is fixedly provided on each connecting ball (27); the hinge seat on the front connecting ball (27) extends from the front opening of the front ball seat (26), and the hinge seat on the rear connecting ball (27) extends from the rear opening of the rear ball seat (26); a first connecting rod (28) and a second connecting rod (29) are hingedly connected to the hinge seat of the front connecting ball (27), and a third connecting rod (30) and a fourth connecting rod (31) are hingedly connected to the hinge seat of the rear connecting ball (27); the lengths of the first connecting rod (28), the second connecting rod (29), the third connecting rod (30), and the fourth connecting rod (31) are kept equal.

9. The conveying device for material buckets in underground coal mines according to claim 8, characterized in that: When the front and rear conveying units (3) are connected to each other, the two groups of connecting mechanisms (7) on the left sides and the two groups of connecting mechanisms (7) on the right sides of the front and rear conveying units (3) remain connected, that is, the first connecting rod (28) of the rear conveying unit (3) is hinged to the third connecting rod (30) of the front conveying unit (3), and the second connecting rod (29) of the rear conveying unit (3) is hinged to the fourth connecting rod (31) of the front conveying unit (3), and the first connecting rod (28), the second connecting rod (29), the third connecting rod (30), and the fourth connecting rod (31) form a rhombus-shaped connecting rod assembly; by controlling the angle of the rhombus-shaped connecting rod assembly, the distance between the front and rear conveying units (3) can be adjusted.

10. The conveying device for material buckets in underground coal mines according to claim 9, characterized in that: When the conveying units (3) of the front and rear curved conveying sections (2) are connected to each other, or when the conveying unit (3) of the curved conveying section (2) is connected to the conveying unit (3) of the straight conveying section (1), the angles of the two rhombus-shaped connecting rod assemblies on the left and right are different, so that the spacing between the two sides of the two conveying units (3) is different, and the angle between the first connecting rod (28) and the second connecting rod (29) located on the inner side of the curve is greater than the angle between the first connecting rod (28) and the second connecting rod (29) located on the outer side of the curve.

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