Curved coal drop pipe discharge system applicable to three belts

Abstract

The present application relates to the curve coal drop pipe unloading system that can be applied to three belts, matches with four-way chute, and comprises: the structural support is fixedly connected with the ship unloader gantry; the coal drop pipe device is installed on the structural support, the coal drop pipe device includes the sea side coal drop pipe and the land side coal drop pipe that are symmetrically arranged, the sea side coal drop pipe and the land side coal drop pipe are the same structure, and the middle coal drop pipe is arranged in the middle between them, the sea side coal drop pipe, the land side coal drop pipe and the middle coal drop pipe are all bending structure bodies, which slow down the material flow rate; and the material drop buffer device is suspendedly installed below the structural support, the sea side coal drop pipe, the land side coal drop pipe and the middle coal drop pipe are respectively provided with one material drop buffer device at the outlet position, and are communicated with the ground belt conveyor through the material drop buffer device, which effectively avoids the direct impact of the material on the ground belt conveyor.The present application can effectively alleviate the material impact, prevent the belt deviation, reduce the equipment wear, simultaneously adapt to the feeding demand of multiple belt conveyors, and improve the adaptability and production efficiency of the system.

Description

Technical Field

[0001] This invention relates to the field of unloading technology for ship unloaders, and more particularly to a curved coal chutes unloading system applicable to three conveyor belts. Background Technology

[0002] Ship unloaders are specialized equipment used for loading and unloading operations at docks. During operation, they primarily use grab buckets to pick up materials, which are then transferred to the system's conveyor belts via an unloading system and coal chute. Specifically, the grab buckets feed material into the unloading hopper, which connects downwards to a four-way chute. The four-way chute distributes the material to the coal chute, thereby transferring the material to different ground conveyors, such as... Figure 1 As shown.

[0003] When unloading materials such as coal and ore, the material directly impacts the receiving conveyor belt through the coal chute. Some coal chute structures are poorly designed, resulting in high material flow rates. This not only generates significant impact force but also easily damages the idlers below the conveyor belt and causes belt misalignment. Specifically, the buffer idler assembly has limited cushioning capacity, making it difficult to effectively absorb the impact force of the material on the conveyor belt, leading to damage.

[0004] Furthermore, to meet the material supply needs of some owners requiring three conveyor belts, it is particularly necessary to achieve multi-path conveying using only a single ship unloader. Therefore, a curved coal chute unloading system adaptable to three conveyor belts has been developed. This system can significantly improve production efficiency, reduce impact damage to the conveyor belts, and effectively meet the diverse needs of users. Summary of the Invention

[0005] To address the problem that the straight design of conventional coal chutes easily leads to high material flow rates and impact damage to belt conveyors, this invention provides a curved coal chute unloading system applicable to three belt conveyors. By optimizing the coal chute structure and designing it as a continuously bent curve, the material flow rate is slowed down. At the same time, a buffer roller mechanism receives the material from the ground belt conveyor. The material impacts the buffer roller mechanism before being conveyed to the ground belt conveyor, providing a reliable guarantee for the stable operation of the ground belt conveyor.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] It can be applied to a curved coal chute unloading system with three belt conveyors and is compatible with a four-way chute. It includes: a structural support frame that is connected and fixed to the unloader gantry.

[0008] A coal chuting device, installed on a structural support, includes symmetrically arranged sea-side and land-side coal chuting pipes. The sea-side and land-side coal chuting pipes have identical structures, with a centrally located intermediate coal chuting pipe between them. All three pipes—sea-side, land-side, and intermediate—are bent structures with continuously bent internal channels. Material flows in a continuously zigzagging manner within these channels to change its flow direction and reduce its velocity.

[0009] The material drop buffer device is suspended and installed below the structural support. One of the material drop buffer devices is arranged at the outlet position of the sea-side coal drop pipe, the land-side coal drop pipe and the intermediate coal drop pipe. The material drop buffer device is connected to the ground belt conveyor through the material drop buffer device. The material drop buffer device is used to receive the material falling from the discharge end of the coal drop pipe device and buffer the impact force of the material falling, so as to prevent the material from directly impacting the ground belt conveyor.

[0010] Furthermore, the seaside coal chutes and the landside coal chutes are arranged symmetrically in a figure-eight shape. The seaside coal chutes include a coal chuting section and a slowing coal section that are connected vertically. The coal chuting section is arranged at an inclination. The lower end of the coal chuting section is bent to form the slowing coal section. The inclination angle of the slowing coal section is smaller than that of the coal chuting section, which facilitates slowing down the material flow rate. A vertical outlet is provided on the slowing coal section. After the material flow rate is reduced, it flows into the material chuting buffer device through the vertical outlet.

[0011] Furthermore, a slowing plate is provided within the slowing section. The slowing plate is arranged at an angle smaller than the inclination angle of the inner wall of the coal falling section to slow down the material flow rate. One end of the slowing plate is connected to the inner wall of the coal falling section, and the other end extends to the vertical outlet. This facilitates the collection of materials falling within the coal falling section and guides them to the vertical outlet.

[0012] Furthermore, one end of the decelerating plate is hinged to the decelerating section to adjust the arrangement angle of the decelerating plate. This facilitates adjustment of the material buffer flow rate according to actual needs.

[0013] Furthermore, a coal retaining plate is also provided in the coal slowing section, and the coal retaining plate and the coal slowing plate are arranged alternately on both sides of the inside of the coal slowing section;

[0014] One end of the coal retaining plate is hinged to the slow-moving section, and the other end extends to the outside of the vertical outlet. The slow-moving plate guides the material to impact the coal retaining plate, changing its flow direction and causing it to fall vertically from the vertical outlet to the middle of the material drop buffer device. The angle of the coal retaining plate can be adjusted to easily change the falling position of the material.

[0015] Furthermore, the intermediate coal drop pipe includes a flange-connected branch pipe one and a branch pipe two, which are connected vertically.

[0016] Furthermore, the upper end face of the first branch pipe is arranged horizontally, and the cross-section of the upper end of the first branch pipe is rectangular. The lower end face of the first branch pipe is arranged obliquely, and the cross-section of the lower end of the first branch pipe is octagonal. The lower end and the upper end of the first branch pipe are of equal width, and the length of the upper end of the first branch pipe is greater than the length of the lower end.

[0017] The inner cavity of the branch pipe forms a channel, which includes an inverted conical channel and an upper straight channel connected vertically. After the material converges through the inverted conical channel, it enters the upper straight channel. During the convergence process, the flow rate of the material decreases.

[0018] Furthermore, the upper end face of the second branch pipe is arranged at an angle, the upper end cross-section of the second branch pipe is octagonal and matches the lower end of the branch pipe, and the width of the second branch pipe decreases along the material flow direction;

[0019] The inner cavity of the second branch tube forms a second channel, which includes a lower straight channel and a diffusion channel that are connected vertically. The lower straight channel is connected to the upper straight channel upwards, and the cross-section of the lower straight channel is smaller than that of the diffusion channel.

[0020] The material flows in an arc-shaped trajectory between the upper straight channel, the lower straight channel, and the diffusion channel to avoid the material falling vertically.

[0021] Furthermore, the material drop buffer devices are arranged at intervals above the ground conveyor belt, and the material drop buffer devices include suspension brackets that are connected and fixed to the structural brackets;

[0022] A buffer roller mechanism is installed below the suspension bracket. The buffer roller mechanism includes several sets of buffer rollers arranged in a straight line at intervals. The arrangement direction of the buffer roller sets is consistent with the extension direction of the ground conveyor belt. The receiving belt of the ground conveyor belt passes around the buffer roller mechanism in an arc shape, with the ends of the receiving belt on the buffer roller mechanism being lower and the middle higher.

[0023] The material guide chute is installed on the suspension bracket and is spaced above the buffer idler group. The material enters the guide chute along the coal drop pipe device and flows onto the receiving belt on the buffer idler mechanism. This ensures that the material is in the middle position of the receiving belt.

[0024] Furthermore, each set of the buffer roller group includes a roller bracket and a triple roller. There are two roller brackets, which are respectively connected to both sides of the suspension bracket. The triple roller is arranged between the two roller brackets. There are two triple rollers arranged at intervals, and the two triple rollers are distributed on both sides of the roller bracket.

[0025] From the middle to both ends of the buffer idler mechanism, the height of the idler brackets in the buffer idler group increases, and the idler brackets are gradually tilted; the horizontal distance between the two triple idlers in the buffer idler group increases; the spacing between the buffer idler groups increases.

[0026] The beneficial effects of the present invention through the above technical solution are:

[0027] This invention features a rational structural design. The sea-side, land-side, and intermediate coal chutes in the coal chute device all employ a curved design with continuously curved internal channels. This curved structure reduces the material's falling speed. The buffer roller mechanism absorbs energy, catching the material falling from the outlet end of the coal chute and cushioning its impact, preventing direct impact on the ground conveyor belt. The coordinated design of the curved coal chutes and the buffer roller mechanism significantly reduces the impact load on the ground conveyor belt, solving the problem of damage caused by excessive impact and extending the equipment's service life.

[0028] The seaside and landside coal chutes of this invention have identical structures, both including a coal chuting section and a deceleration section arranged at an angle. Material falls from the coal chuting section into the deceleration section, where its flow velocity decreases. A deceleration plate alters the material's descent slope to accommodate the buffering needs of different material types. A coal baffle plate is also hinged within the deceleration section, providing buffering and guiding effects on the material, reducing its impact on the downstream conveyor belt, and helping to solve the problem of belt misalignment.

[0029] The intermediate coal dropping section of this invention adopts a segmented design, with material falling through branch pipe one and branch pipe two. After branch pipe one and branch pipe two are connected, an arc-shaped channel is formed inside, which transforms the original material falling process into a material sliding process, allowing the material to slide smoothly onto the receiving belt.

[0030] In this invention, the receiving belt of the ground conveyor belt is wound around a buffer idler mechanism, which receives the material falling from the coal drop pipe, preventing the material from directly impacting the ground conveyor belt. The buffer idler mechanism is suspended, and the falling material first falls onto the buffer idler mechanism, which effectively absorbs the impact energy through its elastic buffering effect, greatly reducing the direct impact on the ground conveyor belt frame, thereby significantly extending the service life of the equipment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the unloading equipment of an existing ship unloader.

[0032] Figure 2 This is a front view of a curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0033] Figure 3 This is a cross-sectional view of the seaside coal chute of the curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0034] Figure 4 This is a side view of the coal retaining plate of the curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0035] Figure 5 This is a top view of the coal retaining plate of the curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0036] Figure 6 This is a front view of the middle coal drop pipe of the curved coal drop pipe unloading system applicable to three conveyor belts, according to the present invention.

[0037] Figure 7 This is a side view of a curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0038] Figure 8 This is a top view of the branch pipe of the curved coal chute unloading system applicable to three conveyor belts, according to the present invention.

[0039] Figure 9 This is a side view of the second branch pipe of the present invention, which can be applied to a curved coal chute unloading system with three conveyor belts. In the figure, A represents the outlet of the second branch pipe.

[0040] Figure 10 This is a schematic diagram of the application status of the material discharge buffer device of the present invention, which can be applied to a curved coal discharge pipe unloading system with three conveyor belts.

[0041] Figure 11 This is a schematic diagram of the buffer roller mechanism of the present invention, which can be applied to a curved coal chutes unloading system with three belts.

[0042] Figure 12 This is a schematic diagram of the guide chute of the curved coal chute unloading system of the present invention, which can be applied to three conveyor belts.

[0043] Figure 13 This is a front view of the idler support of the curved coal chute unloading system that can be applied to three conveyor belts according to the present invention.

[0044] Figure 14 This is a top view of the idler support of the curved coal chute unloading system of the present invention, which can be applied to three conveyor belts.

[0045] Figure 15 This is a schematic diagram of the sliding block of the present invention, which can be applied to a curved coal chute unloading system with three conveyor belts.

[0046] The attached diagram is labeled as follows: 1 unloading hopper, 2 four-way chute, 3 coal drop pipe, 4 ground belt conveyor, 5 structural support, 6 coal drop pipe device, 7 material drop buffer device.

[0047] 81 Seaside coal drop pipe, 811 Coal drop section, 812 Slow coal section, 813 Vertical outlet, 82 Landside coal drop pipe, 9 Intermediate coal drop pipe, 91 Branch pipe one, 92 Branch pipe two, 93 Channel one, 931 Inverted cone channel, 932 Upper straight channel, 94 Channel two, 941 Lower straight channel, 942 Diffusion channel;

[0048] 10 Coal slowing plate, 11 Manual screw one, 12 Coal retaining plate, 121 Wide plate, 122 Hinge shaft, 123 Bending baffle, 13 Manual screw two, 14 Suspension bracket, 15 Buffer roller mechanism, 16 Guide chute, 161 Anti-overflow skirt, 162 Baffle curtain, 17 Buffer roller group, 171 Roller bracket, 172 Triple roller;

[0049] 18 Vertical tube, 181 Guide plate, 182 Strip hole, 19 Horizontal plate, 191 Mounting groove, 20 Sliding block, 201 Pulley, 21 Long rod, 22 Limiting wheel, 23 Cover plate, 24 Positioning post, 25 Compression spring. Detailed Implementation

[0050] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0051] like Figures 2-15 As shown, it can be applied to a curved coal chute unloading system with three belts, and is matched with the four-way chute 2 to receive the material conveyed by the four-way chute 2.

[0052] The curved coal chute unloading system includes a structural support 5, a coal chute assembly 6, and a material discharge buffer device 7. The structural support 5 is a steel frame structure, fixedly connected to the unloader gantry, and supports the coal chute assembly 6 and the material discharge buffer device 7. Material flows sequentially along the four-way chute 2, the coal chute assembly 6, and the material discharge buffer device 7, ultimately flowing onto the ground conveyor belt 4. Figure 2 As shown.

[0053] The coal chute device 6 is installed on the structural support 5. In order to effectively match the four-way chute 2, the coal chute device 6 includes a sea-side coal chute 81, a land-side coal chute 82, and an intermediate coal chute 9. Among them, the sea-side coal chute 81 and the land-side coal chute 82 are symmetrically arranged in a figure-eight shape. The sea-side coal chute 81 and the land-side coal chute 82 have the same structure. The intermediate coal chute 9 is arranged in the middle between the sea-side coal chute 81 and the land-side coal chute 82, thereby effectively connecting the three outlets of the four-way chute 2.

[0054] In this embodiment, the seaside coal chute 81 includes a coal chute section 811 and a slowing coal section 812 connected vertically. The coal chute section 811 is arranged at an incline, and the lower end of the coal chute section 811 is bent to form the slowing coal section 812. The inclination angle of the slowing coal section 812 is smaller than that of the coal chute section 811, which can slow down the material flow rate. A vertical outlet 813 is provided on the slowing coal section 812. After the material flow rate is reduced, it flows into the material drop buffer device 7 through the vertical outlet 813. Figure 3 As shown.

[0055] Specifically, a slowing plate 10 is installed within the slowing section 812. The slowing plate 10 is an independently arranged plate within the slowing section 812. The slowing plate 10 is arranged at an angle smaller than the inclination angle of the inner wall of the coal falling section 811, thereby slowing down the material flow rate. One end of the slowing plate 10 connects to the inner wall of the coal falling section 811, effectively receiving the falling material. The other end of the slowing plate 10 extends to the vertical outlet 813, thereby guiding the material to the outlet of the sea-side coal falling pipe 81. A wear-resistant liner is installed on the surface of the slowing plate 10 to prevent friction and wear between the material and the slowing plate 10. The wear-resistant liner is not shown in the figure.

[0056] It should be noted that one end of the deceleration plate 10 can be hinged to the deceleration section 812, thereby adjusting the arrangement angle of the deceleration plate 10. When the material falls along the coal falling section 811 onto the deceleration plate 10, the smaller the angle A between the deceleration plate 10 and the inner wall of the coal falling section 811, the gentler the tilt angle of the deceleration plate 10, thus improving the buffering capacity for the material. The angle adjustment of the deceleration plate 10 is achieved using a manual screw 11. The specific adjustment method is existing technology and can be found in the adjusting baffle device inside the hopper of the stacker head disclosed in patent publication number CN220664188U, which will not be elaborated here.

[0057] Meanwhile, a coal retaining plate 12 is also installed inside the slow-moving coal section 812. The coal retaining plate 12 and the slow-moving coal plate 10 are arranged alternately on both sides of the interior of the slow-moving coal section 812. During installation, one end of the coal retaining plate 12 is hinged to the slow-moving coal section 812, and the other end extends to the outside of the vertical outlet 813. For example... Figure 4 and Figure 5 As shown, the coal retaining plate 12 includes a wide plate 121 and a hinge shaft 122. The hinge shaft 122 is horizontally arranged above the wide plate 121, and its end is rotatably connected to the slow coal section 812. The lower two sides of the wide plate 121 are bent inward to form a bent baffle 123, which can ensure that the material effectively impacts the baffle area during its descent along the coal chute. Through the buffering and guiding effect of the coal retaining plate 12 on the material, the impact of the material on the downstream conveyor belt is further reduced, and the problem of belt misalignment is helped to be solved.

[0058] The angle of the coal retaining plate 12 is adjusted using a manual screw 13. The specific adjustment method can be referenced from the adjustable baffle device inside the hopper at the head of the stacker disclosed in patent publication CN220664188U. Therefore, after the material impacts the coal retaining plate 12, the decelerating plate 10 changes its flow direction and falls vertically from the vertical outlet 813 to the middle of the material drop buffer device 7. The opening of the coal retaining plate 12 can be flexibly adjusted using the manual screw 13, thereby achieving effective control and blocking of materials with different flow rates. This not only prevents direct impact between the material and the conveyor belt but also helps to avoid belt deviation and improve operational stability.

[0059] Since the seaside coal chute 81 and the landside coal chute 82 have the same structure, their operating principles are also the same. When the four-way chute 2 guides the material to the seaside coal chute 81 or the landside coal chute 82, the material flows obliquely along the coal chute section 811 and onto the deceleration plate 10. As the angle of inclination of the deceleration plate 10 decreases, the material flow rate slows down. The deceleration plate 10 then guides the material to the retaining plate 12. The retaining plate 12 withstands the impact of the material flow and further buffers the material before it falls onto the material drop buffer device 7. The cooperation of the retaining plate 12 and the deceleration plate 10 can buffer the material multiple times and slow down the flow rate. Both the retaining plate 12 and the deceleration plate 10 can be adjusted, thereby controlling the material discharge position and ensuring that the discharge is in the middle of the material drop buffer device 7, preventing the receiving belt from deviating.

[0060] The intermediate coal chute 9 differs in structure from the sea-side coal chute 81 and the land-side coal chute 82. The intermediate coal chute 9 includes two branch pipes 91 and 92 connected by flange bolts. Branch pipes 91 and 92 are vertically connected, thus the intermediate coal chute 9 is a modular structure design. Figure 6 As shown.

[0061] In this embodiment, the upper surface of branch pipe 91 is horizontally arranged, and the upper cross-section of branch pipe 91 is rectangular. The lower surface of branch pipe 91 is inclined, and the lower cross-section of branch pipe 91 is octagonal. The lower and upper ends of branch pipe 91 have the same width, and the length of the upper end of branch pipe 91 is greater than the length of the lower end. Figure 7 and Figure 8 As shown, the inner cavity of the branch pipe 91 forms a channel 93. The channel 93 includes an inverted conical channel 931 and an upper straight channel 932 that are connected vertically. The inverted conical channel 931 is an inverted truncated pyramid structure. The upper straight channel 932 is arranged at an angle. After the material is gathered through the inverted conical channel 931, it enters the upper straight channel 932.

[0062] The upper end face of branch pipe 92 is inclined, and the upper cross-section of branch pipe 92 is octagonal, matching the lower end of branch pipe 91. Along the material flow direction, the width of branch pipe 92 decreases. Figure 9 As shown, the inner cavity of the second pipe 92 forms a second channel 94. The second channel 94 includes a lower straight channel 941 and a diffusion channel 942 connected sequentially. The lower straight channel 941 is arranged at an angle and connects obliquely upwards to the upper straight channel 932. The cross-section of the lower straight channel 941 is smaller than that of the diffusion channel 942. The material flows in an arc-shaped trajectory between the upper straight channel 932, the lower straight channel 941, and the diffusion channel 942 to avoid vertical drop.

[0063] The principle of the intermediate coal dropping pipe 9 is as follows: when the four-way chute 2 guides the material into the intermediate coal dropping pipe 9, the material enters the inverted conical passage 931 to converge the material, and the material flow rate is reduced during the convergence process. The converged material flows along the upper straight passage 932 and the lower straight passage 941 into the diffusion passage 942, so that the flow trajectory of the material is approximately in the shape of a falling stroke, preventing the material from falling vertically and impacting the material receiving buffer device 7. The original material falling process is transformed into a material sliding process, allowing the material to slide gently onto the material receiving belt. It can be seen that the intermediate coal dropping pipe 9 can well collect and guide the material, and at the same time play a good buffering role in the material dropping process, significantly reducing the impact force of the material on the material receiving belt and prolonging the service life of the equipment.

[0064] The material receiving buffer devices 7 are suspended and installed below the structural support 5. One material receiving buffer device 7 is respectively arranged at the outlet positions of the sea-side coal dropping pipe 81, the land-side coal dropping pipe 82 and the intermediate coal dropping pipe 9, so that there are three sets of material receiving buffer devices 7 in total, and each coal dropping pipe is communicated with the ground belt conveyor 4 through the material receiving buffer device 7. As shown in Figure 10 , the material receiving buffer device 7 is located between the coal dropping pipe device 6 and the ground belt conveyor 4, playing a buffering role to prevent the material flow from directly impacting the ground belt conveyor 4.

[0065] Here, the material receiving buffer devices 7 are arranged at intervals above the ground belt conveyor 4, and each material receiving buffer device 7 includes a suspension support 14, a buffer idler mechanism 15 and a material guide chute 16. The suspension support 14 is connected and fixed to the structural support 5, and the suspension support 14 is used for carrying the buffer idler mechanism 15 and the material guide chute 16.

[0066] The buffer idler mechanism 15 is arranged below the suspension support 14 and maintains a certain vertical distance from the ground belt conveyor 4. The material receiving belt of the ground belt conveyor 4 passes around the buffer idler mechanism 15 in an arc-shaped trajectory, and the material receiving belt passing around the buffer idler mechanism 15 is low at both ends and high in the middle. That is, when the ground belt conveyor 4 passes under the ship unloader, the material receiving belt detours from above the buffer idler mechanism 15, so that the falling material first falls onto the buffer idler mechanism 15, and its elastic buffering effect effectively absorbs the impact energy, greatly reducing the direct impact on the frame of the ground belt conveyor 4, thereby significantly prolonging the service life of the equipment.

[0067] The buffer idler mechanism 15 includes several groups of buffer idler sets 17, which are arranged in a line at intervals. The arrangement direction of the buffer idler sets 17 is consistent with the extending direction of the ground belt conveyor 4. Each group of buffer idler sets 17 includes two idler supports 171, the two idler supports 171 are respectively connected and fixed to both sides of the suspension support 14, a triple idler 172 is arranged between the two idler supports 171, the number of the triple idlers 172 is two arranged at intervals, and the two triple idlers 172 are distributed on both sides of the idler supports 171.

[0068] Please note: such as Figure 11 As shown, each set of buffer roller groups 17 has the same structure, but the spacing between the buffer roller groups 17 increases from the middle to both ends of the buffer roller mechanism 15. From the middle to both ends of the buffer roller mechanism 15, the height of the roller supports 171 in the buffer roller groups 17 increases, and the roller supports 171 are gradually arranged at an angle; that is, the roller supports 171 located in the middle of the buffer roller mechanism 15 are arranged vertically, the roller supports 171 located at the ends of the buffer roller mechanism 15 are arranged at an angle, and the roller supports 171 at both ends of the buffer roller mechanism 15 are arranged symmetrically. From the middle to both ends of the buffer roller mechanism 15, the horizontal spacing between the two triple rollers 172 in the buffer roller group 17 increases.

[0069] The guide chute 16 is mounted on the suspension bracket 14 and is spaced above the buffer idler roller group 17. Material enters the guide chute along the coal drop pipe device 6 and flows onto the receiving belt on the buffer idler roller mechanism 15. Figure 12 As shown. The guide chute 16 can guide the material to be conveyed in the central area of ​​the belt to prevent deviation; anti-overflow skirts 161 are provided on both sides of the guide chute 16 in the width direction. The anti-overflow skirts 161 contact the receiving belt downwards to restrict the material in the middle of the receiving belt. The guide chute 16 is provided on both sides in the length direction to reduce dust overflow.

[0070] The principle of the material drop buffer device 7 is as follows: the material conveyed by the coal drop pipe device 6 falls onto the receiving belt of the buffer idler mechanism 15 after passing through the guide trough. Since the buffer idler mechanism 15 and the ground belt conveyor 4 are two independent devices, the impact on the ground belt conveyor 4 can be reduced by the action of the buffer idler mechanism 15 itself.

[0071] To optimize the product structure and improve the cushioning effect of the buffer roller mechanism 15, the roller support 171 includes a vertical tube 18 and a horizontal plate 19. The vertical tube 18 is elastically slidably connected to the horizontal plate 19, and the horizontal plate 19 and the vertical tube 18 are arranged vertically. Figures 13-15 As shown, mounting grooves 191 are provided at both ends of the horizontal plate 19. A triple roller 172 is installed between the corresponding mounting grooves 191 of the two roller supports 171. Since the horizontal plate 19 can slide up and down elastically, the triple roller 172 can also move accordingly to reduce impact force. The elastic sliding design can automatically adjust the buffer amplitude according to the impact intensity of the material to avoid rigid collision.

[0072] Here, the vertical tube 18 is a square tube structure, and a sliding block 20 is slidably connected inside the vertical tube 18. Pulleys 201 are symmetrically arranged on both sides of the sliding block 20, with two pulleys 201 on each side arranged vertically at intervals. The pulleys 201 are track wheels, and their axles are threadedly connected and fixed to the sliding block 20. Meanwhile, guide plates 181 are provided on both sides of the vertical tube 18, with a section in the middle of the guide plate 181 forming a groove. The pulleys 201 on the sliding block 20 slide up and down within the groove.

[0073] A long rod 21 is threadedly connected to the middle of the sliding block 20. One end of the long rod 21 extends out of the vertical tube 18 and connects to the middle of the horizontal plate 19. A strip-shaped hole 182 is opened on the side wall of the vertical tube 18 for the long rod 21 to pass through, and the long rod 21 slides within the strip-shaped hole 182. Limiting wheels 22 are also provided at both ends of the horizontal plate 19. The limiting wheels 22 are also track wheels, and the two limiting wheels 22 cooperate to clamp the vertical tube 18. The limiting wheels 22, together with the pulley 201, enable the horizontal plate 19 to slide smoothly up and down.

[0074] Furthermore, a cover plate 23 is fastened to the bottom of the vertical tube 18. The cover plate 23 is a stepped plate that extends into the vertical tube 18. At least two pins are horizontally inserted between the cover plate 23 and the side wall of the vertical tube 18 to prevent the cover plate 23 from detaching from the vertical tube 18. Positioning posts 24 are respectively provided on the cover plate 23 and the sliding block 20. A compression spring 25 is provided between the cover plate 23 and the sliding block 20. The end of the compression spring 25 is sleeved on the positioning post 24. The sliding block 20 is elastically supported by the compression spring 25, thereby realizing the elastic sliding of the horizontal plate 19 and ultimately driving the three-section idler roller 172 to slide.

[0075] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. A curved coal chute unloading system applicable to three conveyor belts, matched with a four-way chute (2), characterized in that, include: Structural support (5) is connected and fixed to the unloader gantry; A coal chuting device (6) is installed on a structural support (5). The coal chuting device (6) includes a sea-side coal chuting pipe (81), a land-side coal chuting pipe (82), and an intermediate coal chuting pipe (9). An intermediate coal chuting pipe (9) is provided between the sea-side coal chuting pipe (81) and the land-side coal chuting pipe (82). The interiors of the sea-side coal chuting pipe (81), the land-side coal chuting pipe (82), and the intermediate coal chuting pipe (9) are all continuously bent channels. The material flows continuously in different directions within the channels to change the direction of material flow and slow down the material flow rate. The material drop buffer device (7), which includes a buffer roller mechanism (15), is suspended and installed below the structural support (5). The coal drop pipe device (6) is connected to the ground conveyor belt (4) through the buffer roller mechanism (15). The buffer roller mechanism (15) is used to receive the material falling from the discharge end of the coal drop pipe device (6) and buffer the impact force of the falling material to avoid the material directly impacting the ground conveyor belt (4).

2. The curved coal chute unloading system applicable to three conveyor belts as described in claim 1, characterized in that, The seaside coal chute (81) and the landside coal chute (82) have the same structure. The seaside coal chute (81) and the landside coal chute (82) are arranged symmetrically in a figure-eight shape. The seaside coal chute (81) includes a coal chute section (811) and a slow coal section (812) that are connected vertically. The coal chute section (811) is arranged at an inclination. The lower end of the coal chute section (811) is bent to form the slow coal section (812). The inclination angle of the slow coal section (812) is smaller than that of the coal chute section (811) to slow down the material flow rate. A vertical outlet (813) is provided on the slow coal section (812). After the material flow rate is reduced, it flows into the material drop buffer device (7) through the vertical outlet (813).

3. The curved coal chute unloading system applicable to three conveyor belts as described in claim 2, characterized in that, A slowing plate (10) is provided in the slowing section (812). The slowing plate (10) is arranged at an angle smaller than the inclination angle of the inner wall of the coal falling section (811) to slow down the material flow rate. One end of the slowing plate (10) is connected to the inner wall of the coal falling section (811), and the other end extends to the vertical outlet (813).

4. The curved coal chute unloading system applicable to three conveyor belts as described in claim 3, characterized in that, One end of the slow coal plate (10) is hinged to the slow coal section (812) to adjust the arrangement angle of the slow coal plate (10).

5. The curved coal chute unloading system applicable to three conveyor belts as described in claim 3, characterized in that, The slow coal section (812) is also provided with a coal retaining plate (12), and the coal retaining plate (12) and the slow coal plate (10) are arranged alternately on both sides inside the slow coal section (812); One end of the coal retaining plate (12) is hinged to the slow coal section (812), and the other end of the coal retaining plate (12) extends to the outside of the vertical outlet (813). The slow coal plate (10) guides the material to impact the coal retaining plate (12) and change its flow direction, falling vertically from the vertical outlet (813) to the middle of the material drop buffer device (7).

6. The curved coal chute unloading system applicable to three conveyor belts as described in claim 1, characterized in that, The intermediate coal drop pipe (9) includes a flange-connected branch pipe one (91) and a branch pipe two (92), which are connected vertically.

7. The curved coal chute unloading system applicable to three conveyor belts as described in claim 6, characterized in that, The upper end face of the first branch pipe (91) is arranged horizontally, the upper end cross-section of the first branch pipe (91) is rectangular, the lower end face of the first branch pipe (91) is arranged obliquely, the lower end cross-section of the first branch pipe (91) is octagonal, the lower end and the upper end of the first branch pipe (91) are of equal width, and the upper end of the first branch pipe (91) is longer than the lower end. The inner cavity of the branch pipe (91) forms a channel (93), which includes an inverted conical channel (931) and an upper straight channel (932) connected vertically. The material is gathered through the inverted conical channel (931) and then enters the upper straight channel (932).

8. The curved coal chute unloading system applicable to three conveyor belts as described in claim 7, characterized in that, The upper end face of the second branch pipe (92) is arranged at an angle. The upper end cross section of the second branch pipe (92) is octagonal and matches the lower end of the first branch pipe (91). The width of the second branch pipe (92) decreases along the material flow direction. The inner cavity of the second branch pipe (92) forms a second channel (94), the second channel (94) includes a lower straight channel (941) and a diffusion channel (942) connected vertically. The lower straight channel (941) is connected to the upper straight channel (932) upwards, and the cross-section of the lower straight channel (941) is smaller than the cross-section of the diffusion channel (942). The material flows in an arc-shaped trajectory between the upper straight channel (932), the lower straight channel (941), and the diffusion channel (942) to avoid the material falling vertically.

9. The curved coal chute unloading system applicable to three conveyor belts as described in claim 1, characterized in that, The material drop buffer device (7) is set between the discharge end of the coal drop pipe device (6) and the ground belt conveyor (4), and the material drop buffer device (7) is arranged at intervals above the ground belt conveyor (4); The material drop buffer device (7) includes a suspension bracket (14), the buffer roller mechanism (15), and a guide trough (16). The suspension bracket (14) is connected and fixed to the structural bracket (5). The buffer roller mechanism (15) is located below the suspension bracket (14). The buffer roller mechanism (15) includes several sets of buffer roller groups (17), which are arranged in a straight line with intervals. The arrangement direction of the buffer roller groups (17) is consistent with the extension direction of the ground conveyor belt (4). The receiving belt of the ground conveyor belt (4) passes around the buffer roller mechanism (15) in an arc shape. The receiving belt on the buffer roller mechanism (15) is lower at both ends and higher in the middle. The material guide trough (16) is set on the suspension bracket (14). The material guide trough (16) is arranged at intervals above the buffer roller group (17). The material enters the guide trough along the coal drop pipe device (6) and flows to the receiving belt on the buffer roller mechanism (15).

10. The curved coal chute unloading system applicable to three conveyor belts as described in claim 9, characterized in that, Each set of buffer rollers (17) includes roller brackets (171) and triple rollers (172). There are two roller brackets (171), which are connected to both sides of the suspension bracket (14). The triple rollers (172) are arranged between the two roller brackets (171). There are two triple rollers (172) arranged at intervals, and the two triple rollers (172) are distributed on both sides of the roller brackets (171). From the middle to both ends of the buffer roller mechanism (15), the height of the roller bracket (171) in the buffer roller group (17) increases and the roller bracket (171) is gradually tilted; the horizontal distance between the two triple rollers (172) in the buffer roller group (17) increases; the distance between the buffer roller groups (17) increases.

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