Mining double-layer double-conveying belt conveyor

Abstract

The invention discloses a mining double-layer double-conveying belt conveyor, and belongs to the technical field of conveying equipment. Comprising an upper conveying module, a lower conveying module, a screening mechanism, a discharging mechanism, a first transmission mechanism, a conveying mechanism, a dust removal mechanism and a second transmission mechanism. The screening mechanism comprises a screen plate capable of swinging, and oversize large-particle materials on the screen plate are conveyed to the conveying module on the upper portion through a discharging mechanism. The first transmission mechanism drives the sieve plate to swing through the discharging mechanism. The material conveying mechanism is located under the screen plate, and materials below the screen are conveyed to the conveying module on the lower portion through the material conveying mechanism. The second transmission mechanism drives the conveying mechanism to work through the dust removal mechanism. The problem that large and small particles in materials are not uniformly distributed on the conveying belt is solved, so that the running resistance of the conveying belt is reduced, and the uniformity of the conveying speed is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of conveying equipment, in particular to a double-layer double-belt conveyor for mining. Background Art

[0002] The mining double-layer double-belt conveyor is a conveying equipment composed of two parallel conveyor belts. The two layers of conveyor belts have the ability to run simultaneously, and can efficiently complete the task of conveying more materials in the same space, effectively saving space resources. It is widely used in mining operations such as mines and coal mines.

[0003] Some double-layer double-belt conveyors for mining are equipped with hoppers to slow down the falling speed of materials to protect the conveyor belt from impact and wear. However, large and small particles are often difficult to be evenly distributed on the conveyor belt due to size differences. Large particles tend to concentrate in certain areas (such as the middle or inclined sections), increasing the running resistance of the conveyor belt in these areas, resulting in uneven conveying speed, thereby affecting the material conveying efficiency. In addition, during the falling process of materials, a large amount of flying dust will be generated due to impact, extrusion and friction between materials and between materials and equipment. This dust will not only pollute the environment, but also adhere to the conveyor belt and peripheral equipment, especially key components such as motors and reducers, thereby increasing the operating load of the equipment and shortening the service life of the equipment. Therefore, a new double-layer double-belt conveyor for mining is proposed. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and proposes a double-layer double-belt conveyor for mining; the present invention is achieved through the following technical solutions: A double-layer double-belt conveyor for mining, comprising a conveying module, wherein the conveying modules have two parts and are arranged in an upper and lower manner; a screening mechanism, a material discharge mechanism, a first transmission mechanism, a material feeding mechanism, a dust removal mechanism and a second transmission mechanism; The screening mechanism comprises a connecting plate, springs, a screen plate, a spring, a connecting block, a connecting rod, a fixed rod, a rotating plate and a rotating shaft; the two connecting plates are symmetrically arranged, the top of the connecting plate is connected to the bottom of a plurality of springs, the top of the plurality of springs is connected to the side wall of the screen plate, the upper and lower surfaces of the side wall of one side of the screen plate are symmetrically connected with springs, the end of the spring away from the screen plate is connected with a connecting block, the connecting rod is passed through the upper and lower connecting blocks and the two springs, and the connecting rod is fixedly connected to the upper and lower connecting blocks; the connecting rod does not contact the screen plate, so that the connecting rod has a swinging space; a rotating shaft is fixedly connected at the center of the rotating plate, the fixed rod is fixedly connected to the rotating plate, and the axis of the fixed rod is not at the same position as the center of the rotating plate, the fixed rod is passed through the connecting rod and is rotatably connected to the connecting rod; The material discharge mechanism comprises a motor 1, a rotating shaft 2 is arranged at the output end of the motor 1, a plurality of material discharge shells are arranged on the outer surface of the rotating shaft 2, the screen plate is inclined, the lowest point of the screen plate is located above the material discharge shell, and the large particles on the screen of the screen plate pass through the lowest point of the screen plate and fall into the material discharge shell, and are sent to the conveyor belt of the upper conveying module by the material discharge shell; The transmission mechanism 1 is connected between the rotating shaft 1 and the rotating shaft 2, and drives the rotating shaft 1 to rotate through the rotating shaft 2; The feeding mechanism is located directly below the screen plate. The undersized materials screened by the screen plate fall directly into the feeding mechanism, and the small particles undersized materials are transported to the conveyor belt of the conveying module at the bottom through the feeding mechanism. The dust removal mechanism includes a pipeline, the bottom end of the pipeline is connected to a collection box, the outer surface of the collection box is provided with a motor 2, the output end of the motor 2 is provided with a rotating shaft 3, the rotating shaft 3 is rotatably connected to the collection box, the outer surface of the rotating shaft 3 is provided with a bevel gear 1, the outer surface of the bevel gear 1 is meshed with a bevel gear 2, the inner surface of the bevel gear 2 is fixedly connected with a rotating shaft 4, the rotating shaft 4 is rotatably connected to the collection box, the outer surface of the rotating shaft 4 is provided with a fan blade, a filter screen is provided below the fan blade, and the filter screen is fixedly connected to the collection box; The transmission mechanism 2 is connected between the rotating shaft 3 and the feeding mechanism, and the feeding mechanism is driven to rotate by the rotating shaft 3 to transport the materials.

[0005] Furthermore, it also includes a screening box and a material guide plate. The screening box is arranged on the outside of the conveying module; the material guide plate and the screening mechanism are arranged inside the screening box; and the screening mechanism is located below the material guide plate.

[0006] Furthermore, the two connecting plates are symmetrically arranged on the inner wall of the screening box, and the top of the connecting rod is in contact with the bottom of the guide plate.

[0007] Furthermore, a round block is provided at the bottom end of the connecting rod; the fixing rod is passed through the round block and is rotatably connected to the round block.

[0008] Furthermore, the transmission mechanism 1 includes two pulleys 1, which are connected to each other through a belt body 1, and the two pulleys 1 are fixedly connected to the rotating shaft 1 and the rotating shaft 2 respectively.

[0009] Furthermore, the diameter of the pulley 1 fixedly connected to the rotating shaft 1 is smaller than the diameter of the pulley 1 fixedly connected to the rotating shaft 2, and the transmission ratio is 1:4.

[0010] Furthermore, the feeding mechanism includes a support plate arranged on the inner wall of the screening box, an auger is arranged on the inner side of the support plate, and the auger is rotatably connected to the screening box; the support plate and the auger are located directly below the screen plate, and the undersized material screened by the screen plate falls directly into the support plate, and the small particle material undersized is transported to the conveyor belt of the lower conveying module through the auger.

[0011] Furthermore, the transmission mechanism 2 includes two pulleys 2 arranged on one side of the screening box, the two pulleys 2 are connected through the belt body 2, and the two pulleys 2 are respectively fixedly connected to the auger and the rotating shaft 3; after the motor 2 is turned on, the rotating shaft 3 rotates, driving the fan blades to rotate, and at the same time driving the auger to rotate through the belt body 2; the airflow generated by the rotating fan blades guides the dust into the interior of the pipe, and after being filtered by the filter, it is transported to the interior of the collection box for collection or discharged through the air outlet of the collection box.

[0012] Furthermore, a baffle is provided on the inner wall of the screening box, and the baffle is located above the material guide plate and on one side of the pipeline inlet, and the baffle prevents the material from entering the interior of the pipeline.

[0013] Furthermore, the pipes, collection boxes and baffles are made of polypropylene plastic.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: 1. The present invention realizes the functions of efficient material screening and conveying. When in use, the material is guided by the guide plate, the material is screened by the screening mechanism, the large-particle material is thrown out and discharged by the discharge mechanism (the dropping speed of the large-particle material is made close to the conveying speed of the upper conveying module to reduce the impact of the large-particle material), and the small-particle material is conveyed by the feeding mechanism, and then the large-particle and small-particle materials can be respectively conveyed to the two conveying modules for synchronous conveying, which effectively solves the problem of uneven distribution of large and small particles in the material on the conveyor belt due to size differences, thereby reducing the running resistance of the conveyor belt, ensuring the uniformity of the conveying speed, and thus improving the conveying efficiency and stability of the material; 2. The present invention realizes the function of collecting dust in material particles. When the material falls on the guide plate, a large amount of flying dust will be generated due to impact, extrusion and friction between the materials and between the materials and the equipment. At this time, through the operation of the dust removal mechanism, the large amount of flying dust generated can be collected, which effectively avoids the large amount of flying dust from adhering to the conveyor belt and peripheral equipment, especially key components such as motors and reducers, thereby reducing the operating load of the equipment and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the cross-sectional structure of the screening box; Figure 3 For the present invention Figure 2 Schematic diagram of the blanking mechanism structure; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of area A; Figure 5 For the present invention Figure 4 A schematic diagram of the structure on the other side of the rotating plate; Figure 6 For the present invention Figure 2 A schematic diagram of the cross-sectional structure of the collection box in FIG. Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of area B.

[0016] Description of the numbers in the figure: 1. Support frame; 2. Screening box; 3. Guide plate; 4. Screening mechanism; 41. Connecting plate; 42. Shrapnel; 43. Screen plate; 44. Spring; 45. Connecting block; 46. Connecting rod; 461. Round block; 47. Fixed rod; 48. Rotating plate; 49. Rotating shaft one; 5. Unloading mechanism; 51. Motor one; 52. Rotating shaft two; 53. Unloading shell; 6. Transmission mechanism one; 61. Pulley one; 62. Belt body one; 7. Feeding mechanism; 71. Support plate; 72. Auger; 8. Dust removal mechanism; 81. Pipeline; 82. Collecting box; 83. Motor two; 84. Rotating shaft three; 85. Bevel gear one; 86. Bevel gear two; 87. Rotating shaft four; 88. Fan blade; 89. Filter; 9. Transmission mechanism two; 91. Pulley two; 92. Belt body two; 10. Conveying module; 11. Baffle. 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] See also Figures 1 to 7 This embodiment provides a double-layer double-belt conveyor for mining, including a support frame 1 and a conveying module 10, wherein the support frame 1 is arranged on both sides of the conveying module 10, and further includes: A screening box 2, which is arranged outside the conveying module 10; A material guide plate 3, which is arranged inside the screening box 2 and is used for feeding; The screening mechanism 4 is arranged inside the screening box 2 and below the material guide plate 3; A material discharge mechanism 5, which is arranged on the outer surface of the screening box 2 and located on one side of the screening mechanism 4; Transmission mechanism 1 6, which is arranged on one side of the screening box 2, and is respectively connected to the screening mechanism 4 and the feeding mechanism 5; The feeding mechanism 7 is arranged inside the screening box 2, and the feeding mechanism 7 is located below the screening mechanism 4; A dust removal mechanism 8, which is arranged outside the screening box 2; The transmission mechanism 2 9 is arranged on one side of the screening box 2 , and the transmission mechanism 2 9 is connected to the feeding mechanism 7 and the dust removal mechanism 8 respectively.

[0019] Among them, there are two conveying modules 10, which are distributed up and down, and are mainly composed of components such as a conveyor belt, a driving roller, a motor, an upper roller and a lower roller, which can realize the material conveying function and are existing technologies; and the lengths of the two conveying modules 10 and the support frame 1 can be flexibly designed according to actual conveying needs to meet the requirements of different material conveying volumes, conveying distances and site layouts.

[0020] The screening mechanism 4 includes a connecting plate 41, a spring 42, a screen plate 43, a spring 44, a connecting block 45, a connecting rod 46, a fixing rod 47, a rotating plate 48 and a rotating shaft 49; two connecting plates 41 are symmetrically arranged on the inner wall of the screening box 2, the top of the connecting plate 41 is connected to the bottom of a plurality of springs 42, the top of a plurality of springs 42 is connected to the side wall of the screen plate 43, the upper and lower surfaces of the side wall of one side of the screen plate 43 are symmetrically connected with springs 44, one end of the spring 44 away from the screen plate 43 is connected with a connecting block 45, and the connecting rod 46 is inserted between the upper and lower connecting blocks 45 and the two springs 44, and the connecting rod 46 is fixedly connected to the upper and lower connecting blocks 45; the connecting rod 46 does not contact the screen plate 43, so that the connecting rod 46 has a swinging space; the top of the connecting rod 46 contacts the bottom of the guide plate 3, and a round block 461 is provided at the bottom of the connecting rod 46; a rotating shaft 49 is fixedly connected to the center of the rotating plate 48, and the rotating shaft 49 is rotatably connected to the screening box 2; the fixed rod 47 is fixedly connected to the rotating plate 48, and the axis of the fixed rod 47 is not at the same position as the center of the rotating plate 48, and the fixed rod 47 is inserted in the round block 461 and is rotatably connected to the round block 461. When the rotating plate 48 rotates, the fixed rod 47 can rotate around the center of the rotating plate 48, thereby realizing the swing of the connecting rod 46. The swing of the connecting rod 46 drives the connecting block 45 to swing, which in turn acts on the spring 44. Under the action of the spring 44 and the spring 42, the screen plate 43 is driven to shake, thereby assisting the material on the screen plate 43 to be fully screened.

[0021] The material discharging mechanism 5 includes a motor 1 51 disposed on the outer surface of the screening box 2, a rotating shaft 2 52 is disposed at the output end of the motor 1 51, the rotating shaft 2 52 is rotatably connected to the screening box 2, and a plurality of material discharging shells 53 are disposed on the outer surface of the rotating shaft 2 52, and the plurality of material discharging shells 53 are distributed in a circular array with the axis of the rotating shaft 2 52 as the center. The sieve plate 43 is inclined, and the lowest point of the sieve plate 43 is located above the material discharging shell 53. The large particles on the sieve plate 43 pass through the lowest point of the sieve plate 43 and fall into the material discharging shell 53, and are sent to the conveyor belt of the upper conveying module 10 by the material discharging shell 53.

[0022] The transmission mechanism 6 includes two pulleys 61 arranged on one side of the screening box 2. The two pulleys 61 are connected through a belt body 62. The two pulleys 61 are fixedly connected to the rotating shaft 49 and the rotating shaft 52 respectively.

[0023] It should be noted that the diameter of the pulley 61 fixedly connected to the rotating shaft 49 is smaller than the diameter of the pulley 61 fixedly connected to the rotating shaft 52, and the transmission ratio is 1:4. Each time the screen plate 43 vibrates to feed the material, it can ensure that the unloading shell 53 is in the material receiving position.

[0024] When the motor 51 is started, the unloading shell 53 rotates and the rotating shaft 52 rotates, and the rotating shaft 49 is driven to rotate through the transmission of the belt body 62, and the rotating plate 48 is driven to rotate through the rotating shaft 49, and then the connecting rod 46 is driven to swing through the fixed rod 47.

[0025] The feeding mechanism 7 includes a support plate 71 arranged on the inner wall of the screening box 2, and an auger 72 is arranged on the inner side of the support plate 71, and the auger 72 is rotatably connected to the screening box 2. The support plate 71 and the auger 72 are located directly below the screen plate 43, and the under-screened material screened by the screen plate 43 directly falls into the support plate 71, and the small particle material under-screened is transported to the conveyor belt of the lower conveying module 10 through the auger 72; thereby, the large particle material and the small particle material are transported separately.

[0026] The dust removal mechanism 8 includes two pipes 81 arranged on the outer surface of the screening box 2, the bottom ends of the two pipes 81 are connected to the collecting box 82, the outer surface of the collecting box 82 is provided with a motor 2 83, the output end of the motor 2 83 is provided with a rotating shaft 3 84, the rotating shaft 3 84 is rotatably connected to the collecting box 82, the outer surface of the rotating shaft 3 84 is provided with a bevel gear 1 85, the outer surface of the bevel gear 1 85 is meshed with a bevel gear 2 86, the inner surface of the bevel gear 2 86 is fixedly connected with a rotating shaft 4 87, the rotating shaft 4 87 is rotatably connected to the collecting box 82, the outer surface of the rotating shaft 4 87 is provided with a fan blade 88, a filter screen 89 is provided below the fan blade 88, and the filter screen 89 is fixedly connected to the collecting box 82.

[0027] like Figure 2As shown, a baffle 11 is provided on the inner wall of the screening box 2 . The baffle 11 is located above the material guide plate 3 and on one side of the entrance of the two pipes 81 . The baffle 11 has a shielding function and can effectively prevent materials from entering the interior of the pipes 81 .

[0028] The pipeline 81, the collecting box 82 and the baffle 11 are all made of polypropylene plastic, which has the characteristics of light weight, high hardness and corrosion resistance.

[0029] The transmission mechanism 29 includes two pulleys 291 arranged on one side of the screening box 2, and the two pulleys 291 are connected by a belt body 292, and the two pulleys 291 are respectively fixedly connected to the auger 72 and the rotating shaft 3 84. After the motor 283 is turned on, the rotating shaft 3 84 rotates, driving the fan blades 88 to rotate, and at the same time driving the auger 72 to rotate through the belt body 292. The airflow generated by the rotating fan blades 88 can guide the dust into the interior of the pipe 81, and after being filtered by the filter screen 89, it is transported to the interior of the collection box 82 for collection or discharged through the air outlet of the collection box 82.

[0030] The working principle of a double-layer double-belt conveyor for mining proposed in this embodiment is as follows: When in use, start motor 51, and the rotation of the output end of motor 51 can drive the rotation of shaft 2 52, and then the rotation of shaft 2 52 can drive the unloading shell 53 to rotate. At the same time, the rotation of shaft 2 52 can drive pulley 1 61 to rotate, so that shaft 1 49 rotates, and then the rotation of shaft 1 49 can drive the fixed rod 47 to rotate around the center of the rotating plate 48. Since the fixed rod 47 is rotatably connected with the connecting rod 46, when the fixed rod 47 rotates, it can drive the connecting rod 46 to swing, and then through the cooperation of the connecting block 45, the spring 44 and the spring piece 42, the screen plate 43 can swing, so as to promote the full screening of the material on the screen plate 43.

[0031] Then start motor 2 83. The output end of motor 2 83 rotates to drive shaft 3 84 to rotate. Then, the rotation of shaft 3 84 drives bevel gear 1 85 to rotate, and then drives bevel gear 2 86 to rotate. Then, the rotation of bevel gear 2 86 drives shaft 4 87 to rotate, so that the fan blades 88 rotate. At the same time, the rotation of shaft 3 84 drives pulley 2 91 to rotate, so that the auger 72 rotates.

[0032] When materials are put into the screening box 2, they first fall on the swinging screen plate 43 under the guidance of the guide plate 3. Small particles pass through the screen plate 43 and fall onto the support plate 71. Then, the small particles can be transported to the lower conveying module 10 through the rotating auger 72. At the same time, large particles remaining on the screen plate 43 can move forward with the swinging screen plate 43, and then fall into the lower material shell 53 rotated to a suitable position. With the rotation of the lower material shell 53, the large particles can be thrown out and fall onto the upper conveying module 10. Then, the large particles and small particles can be synchronously transported through the two conveying modules 10. During this process, the upper end of the swinging connecting rod 46 will contact and knock the guide plate 3 to achieve the vibration of the guide plate 3 so that the materials on the guide plate 3 can fall.

[0033] When the material falls onto the guide plate 3, a large amount of flying dust will be generated due to the impact, extrusion and friction between the materials and the friction between the materials and the equipment. At this time, the airflow generated by the rotating fan blades 88 can guide the dust into the inside of the pipe 81, and after being filtered by the filter 89, it is transported to the inside of the collection box 82 for collection or discharged through the air outlet of the collection box 82.

[0034] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A double-layer double-belt conveyor for mining, comprising a conveying module (10), wherein the conveying modules (10) are two and are arranged in an upper and lower manner; characterized in that: It also includes a screening mechanism (4), a feeding mechanism (5), a transmission mechanism 1 (6), a feeding mechanism (7), a dust removal mechanism (8) and a transmission mechanism 2 (9); The screening mechanism (4) comprises a connecting plate (41), a spring (42), a screen plate (43), a spring (44), a connecting block (45), a connecting rod (46), a fixing rod (47), a rotating plate (48) and a rotating shaft (49); the two connecting plates (41) are symmetrically arranged, the top of the connecting plate (41) is connected to the bottom of a plurality of springs (42), the top of the plurality of springs (42) is connected to the side wall of the screen plate (43), the upper and lower surfaces of one side wall of the screen plate (43) are symmetrically connected with the spring (44), and the end of the spring (44) away from the screen plate (43) is connected to the connecting block (45). 5), the connecting rod (46) is inserted into the upper and lower connecting blocks (45) and the two springs (44), and the connecting rod (46) is fixedly connected to the upper and lower connecting blocks (45); the connecting rod (46) does not contact the screen plate (43), so that the connecting rod (46) has a swing space; the center of the rotating plate (48) is fixedly connected to a rotating shaft (49), the fixed rod (47) is fixedly connected to the rotating plate (48), and the axis of the fixed rod (47) is not at the same position as the center of the rotating plate (48), and the fixed rod (47) is inserted into the connecting rod (46) and is rotatably connected to the connecting rod (46); The material discharge mechanism (5) comprises a motor 1 (51), a rotating shaft 2 (52) is arranged at the output end of the motor 1 (51), a plurality of material discharge shells (53) are arranged on the outer surface of the rotating shaft 2 (52), the sieve plate (43) is inclined, the lowest point of the sieve plate (43) is located above the material discharge shell (53), and the large particles on the sieve of the sieve plate (43) pass through the lowest point of the sieve plate (43) and fall into the material discharge shell (53), and are conveyed by the material discharge shell (53) to the conveyor belt of the upper conveying module (10); The transmission mechanism 1 (6) is connected between the rotating shaft 1 (49) and the rotating shaft 2 (52), and drives the rotating shaft 1 (49) to rotate via the rotating shaft 2 (52); The feeding mechanism (7) is located directly below the sieve plate (43), and the small particles of material that have been screened by the sieve plate (43) directly fall into the feeding mechanism (7), and the small particles of material that have been screened by the sieve plate (43) are transported to the conveyor belt of the conveying module (10) at the bottom through the feeding mechanism (7); The dust removal mechanism (8) comprises a pipe (81), the bottom end of the pipe (81) is connected to a collection box (82), a motor 2 (83) is arranged on the outer surface of the collection box (82), a rotating shaft 3 (84) is arranged at the output end of the motor 2 (83), the rotating shaft 3 (84) is rotatably connected to the collection box (82), a bevel gear 1 (85) is arranged on the outer surface of the rotating shaft 3 (84), a bevel gear 2 (86) is meshed on the outer surface of the bevel gear 1 (85), a rotating shaft 4 (87) is fixedly connected to the inner surface of the bevel gear 2 (86), the rotating shaft 4 (87) is rotatably connected to the collection box (82), a fan blade (88) is arranged on the outer surface of the rotating shaft 4 (87), a filter screen (89) is arranged below the fan blade (88), and the filter screen (89) is fixedly connected to the collection box (82); The transmission mechanism 2 (9) is connected between the rotating shaft 3 (84) and the feeding mechanism (7), and drives the feeding mechanism (7) to rotate through the rotating shaft 3 (84) to transport materials.

2. A double-layer double-belt conveyor for mining according to claim 1, characterized in that: It also comprises a screening box (2) and a material guide plate (3); the screening box (2) is arranged outside the conveying module (10); the material guide plate (3) and the screening mechanism (4) are arranged inside the screening box (2); and the screening mechanism (4) is located below the material guide plate (3).

3. A double-layer double-belt conveyor for mining according to claim 2, characterized in that: The two connecting plates (41) are symmetrically arranged on the inner wall of the screening box (2), and the top of the connecting rod (46) contacts the bottom of the guide plate (3).

4. A double-layer double-belt conveyor for mining according to claim 1, characterized in that: A round block (461) is provided at the bottom end of the connecting rod (46); the fixing rod (47) is inserted into the round block (461) and is rotatably connected to the round block (461).

5. A double-layer double-belt conveyor for mining according to claim 1, characterized in that: The transmission mechanism 1 (6) includes two pulleys 1 (61), the two pulleys 1 (61) are connected to each other through a belt body 1 (62), and the two pulleys 1 (61) are fixedly connected to the rotating shaft 1 (49) and the rotating shaft 2 (52) respectively.

6. A double-layer double-belt conveyor for mining according to claim 5, characterized in that: The diameter of the pulley 1 (61) fixedly connected to the rotating shaft 1 (49) is smaller than the diameter of the pulley 1 (61) fixedly connected to the rotating shaft 2 (52), and the transmission ratio is 1:

4.

7. A double-layer double-belt conveyor for mining according to claim 2, characterized in that: The feeding mechanism (7) comprises a support plate (71) arranged on the inner wall of the screening box (2); an auger (72) is arranged on the inner side of the support plate (71); the auger (72) is rotatably connected to the screening box (2); the support plate (71) and the auger (72) are located directly below the screening plate (43); small particles of material under the screen that have been screened by the screening plate (43) directly fall into the support plate (71); and the small particles of material under the screen are transported to the conveyor belt of the lower conveying module (10) through the auger (72).

8. A double-layer double-belt conveyor for mining according to claim 7, characterized in that: The transmission mechanism 2 (9) comprises two belt pulleys 2 (91) arranged on one side of the screening box (2), the two belt pulleys 2 (91) are connected to each other through a belt body 2 (92), and the two belt pulleys 2 (91) are respectively fixedly connected to the auger (72) and the rotating shaft 3 (84); after the motor 2 (83) is turned on, the rotating shaft 3 (84) rotates, driving the fan blades (88) to rotate, and at the same time driving the auger (72) to rotate through the belt body 2 (92); the airflow generated by the rotating fan blades (88) guides the dust into the interior of the pipe (81), and after being filtered by the filter screen (89), the dust is transported to the interior of the collection box (82) for collection or discharged through the air outlet of the collection box (82).

9. A double-layer double-belt conveyor for mining according to claim 2, characterized in that: The inner wall of the screening box (2) is provided with a baffle (11), which is located above the material guide plate (3) and on one side of the inlet of the pipeline (81). The baffle (11) prevents materials from entering the interior of the pipeline (81).

10. A double-layer double-belt conveyor for mining according to claim 9, characterized in that: The pipeline (81), the collecting box (82) and the baffle (11) are all made of polypropylene plastic.

Images