A detachable modular spiral transfer chute
By designing a detachable modular spiral transfer chute, lump coal spirals down along the spiral plate and forms a buffer slag layer on the protrusion, solving the problems of lump coal crushing and dust pollution, and achieving low crushing rate and environmentally friendly transportation.
Patent Information
- Application Number
- CN202522200971.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-17
AI Technical Summary
In existing coal mine transfer equipment, lump coal moves at high speeds in the vertical direction during free fall, resulting in large impact forces on the conveyor belt, a high lump coal breakage rate, and serious dust pollution due to the open design, which affects health.
Design a detachable modular spiral transfer chute, comprising an upper cylinder and a lower cylinder, with spiral plates and protrusions inside. Lump coal spirals down along the spiral plates, and the protrusions form a buffer slag layer. The top feed hopper is designed with a closed opening to suppress dust.
It effectively reduces the breakage rate of lump coal, reduces dust pollution, is simple to operate and easy to load and unload, and improves the safety and environmental protection of coal mine transportation.
Smart Images
Figure CN224677008U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal mine transfer auxiliary technology, specifically relating to a detachable modular spiral transfer chute. Background Technology
[0002] In coal mine transportation, existing transfer equipment generally adopts a coal bunker-type coal dropping method. Lump coal from the mining face falls directly from the main conveyor belt head into the secondary conveyor belt, with a drop of approximately 5 meters. This dropping method causes the lump coal to undergo free fall vertically, resulting in very high speeds as it enters the secondary conveyor belt. Furthermore, because the angle between the falling coal's velocity and the conveyor belt's running speed is large, it generates a significant impact force upon contact with the conveyor belt, causing the lump coal to break. During the fall, the lump coal also collides and breaks apart. Impacts with obstructions or baffles that change the coal flow direction will further break the lump coal.
[0003] To address the aforementioned issues, Chinese utility model patent CN220097435 discloses a coal conveying and transfer device for coal mines, specifically including an unloading drum and a coal conveyor belt. Coal mined from the working face is fed out by the unloading drum and falls onto the coal conveyor belt for transport. The coal discharge direction of the unloading drum is set at a 90-degree angle to the transport direction of the coal conveyor belt. A rotary chute is provided between the unloading drum and the coal conveyor belt. The angle between the downward inclination of the rotary chute inlet and the horizontal coal discharge direction of the unloading drum, and the angle between the inclination of the rotary chute outlet and the running direction of the coal conveyor belt, are both less than or equal to 30 degrees. However, this device still has the following problems in actual use: 1. There is still a significant height difference between the lump coal and the unloading drum. When the lump coal falls from the coal conveyor belt into the unloading drum, the breakage rate of the lump coal is still relatively high, which fails to provide a good buffering effect. 2. The unloading drum has an open opening, causing the coal to travel a long distance before falling into the drum, resulting in a large amount of dust being stirred up, causing air pollution and affecting the health of workers.
[0004] In view of the above problems, this application provides a detachable modular spiral transfer chute that is simple in structure, easy to operate, has a good buffering effect, and can suppress dust, so as to reduce the breakage rate of lump coal and increase the profitability of coal mines. Utility Model Content
[0005] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides a detachable modular spiral transfer chute for use between a first and a second coal mine conveyor belt with a vertical drop. The chute includes an unloading cylinder comprising an upper cylinder and a lower cylinder integrally formed with and connected to the upper cylinder. A coal inlet hole is provided on the top plate of the upper cylinder. The lower cylinder is open at its lower end and gradually narrows inward from top to bottom, forming an inward-sloping structure. A spiral plate is installed inside the upper cylinder. The top of the spiral plate is connected to the inner wall of the top plate of the upper cylinder, and the top of the receiving surface of the spiral plate is located directly below the coal inlet hole. This allows lump coal to fall into the unloading cylinder through the coal inlet hole and be received by the spiral plate. The lump coal descends spirally along the spiral plate. The bottom end of the spiral plate is flush with the bottom end of the upper cylinder. Several protrusions are provided on the top of the receiving surface of the spiral plate.
[0006] As a preferred technical solution of this utility model, a feeding funnel is provided on the upper cylinder. The feeding funnel includes a funnel body, which is wider at the top and narrower at the bottom. An extension is provided at the bottom of the funnel body. The shape of the extension corresponds to the shape of the coal inlet hole, and the extension is inserted into the coal inlet hole so that the feeding funnel is connected to the interior of the upper cylinder.
[0007] As a preferred embodiment of this utility model, an upper sliding plate is provided above the feeding hopper. The upper sliding plate is inclined, with its top end being a coal receiving end and its bottom end being a coal discharging end. First vertical side plates are provided on both sides of the upper sliding plate, and a first vertical baffle is provided at the top of the upper sliding plate. The coal receiving end of the upper sliding plate is located directly below the coal end of the first coal mine conveyor belt so that lump coal falls onto the upper sliding plate after falling from the first coal mine conveyor belt. The coal discharging end of the upper sliding plate is located directly above the feeding hopper so that lump coal falls into the feeding hopper after falling from the coal discharging end of the upper sliding plate.
[0008] As a preferred technical solution of this utility model, a connecting support rod is provided between the bottom surface of the upper slide plate and the outer surface of the upper cylinder. The top end of the connecting support rod is connected to the bottom surface of the upper slide plate, and the bottom end of the connecting support rod is connected to the outer surface of the upper cylinder. A first connecting rod and a second connecting rod are provided between the first vertical side plates on both sides of the upper slide plate and the support of the first coal mine conveyor belt.
[0009] As a preferred embodiment of this utility model, a sliding plate is provided below the lower cylinder. The top of the sliding plate is a coal receiving end, and the bottom of the sliding plate is a coal discharging end. Second vertical side plates are provided on both sides of the sliding plate, and a second vertical baffle is provided at the top of the sliding plate. The coal receiving end of the sliding plate is located directly below the bottom opening of the lower cylinder, so that lump coal falls from the lower cylinder and lands on the sliding plate. The coal discharging end of the sliding plate is located directly above the second coal mine conveyor belt, so that lump coal falls from the coal discharging end of the sliding plate and lands on the second coal mine conveyor belt.
[0010] As a preferred embodiment of this utility model, a third connecting rod and a fourth connecting rod are provided between the lower cylinder and the second vertical side plates on both sides of the lower slide plate, and a fifth connecting rod and a sixth connecting rod are provided between the second vertical side plates on both sides of the lower slide plate and the support of the second coal mine conveyor belt.
[0011] As a preferred embodiment of this utility model, the unloading cylinder is provided with at least four support legs, and the bottom end of each support leg is provided with a foot for connecting to the coal conveying support.
[0012] As a preferred embodiment of this utility model, the protrusion includes a plurality of buffer plates arranged along the rolling direction of the coal chunks, and the plurality of buffer plates are spaced apart.
[0013] As a preferred technical solution of this utility model, the protrusion includes a plurality of buffer longitudinal vertical plates arranged along the rolling direction of the coal lump and a plurality of buffer transverse vertical plates perpendicularly intersecting the plurality of buffer longitudinal vertical plates. The plurality of buffer longitudinal vertical plates are arranged at intervals, and the plurality of buffer transverse vertical plates are arranged at intervals.
[0014] The beneficial effects of the above technical solution are as follows: (1) The present invention has a spiral plate installed in the upper cylinder of the unloading cylinder, so that the lump coal falls spirally along the spiral plate after entering the unloading cylinder, which can play the role of gravity reduction and has a good buffering effect, preventing the lump coal from breaking in large quantities when it falls; in addition, the top of the bearing surface of the spiral plate is provided with several protrusions. When the coal starts to be transported, the lump coal in front will collide with the protrusions when it falls onto the spiral plate. Some coal dust sticks to the protrusions and the gaps between the protrusions, so that the protrusions form a buffer coal slag layer as a whole, which reduces the gravity of the lump coal transported later and reduces the breakage rate of the lump coal during the transportation process. (2) The top of the unloading cylinder of this utility model is closed, and a coal inlet hole is set on the top plate and the lump coal is transported through the corresponding feeding funnel. This can effectively suppress the dust raised by the lump coal falling into the unloading cylinder, which can not only avoid environmental pollution, but also avoid harm to the operator's body. (3) This utility model is simple to operate and easy to load and unload. Specifically, the unloading cylinder of this application is equipped with at least four support legs, and the bottom end of the support legs is provided with feet for connecting the coal transport support. This application can be installed on the coal transport support of the coal yard by means of anchor bolts. When the coal transport is completed or when unloading is not required, this application can be disassembled as a whole by means of anchor bolts, which makes it easy to load and unload this application. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the working state from a first angle according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram from a second angle of one embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the unloading cylinder and the feeding funnel of this utility model; Figure 4 This is a schematic diagram of the unloading cylinder of this utility model; Figure 5 This is a perspective view of the unloading cylinder of this utility model with the cover plate removed. Figure 6 This is a schematic diagram of the structure of the unloading cylinder of this utility model without the top plate; Figure 7 This is a schematic diagram of another embodiment of the unloading cylinder of this utility model, excluding the top plate; Figure 8 This is a schematic diagram of the structure of the feed funnel of this utility model; Figure 9 This is a schematic diagram of the upper sliding plate of this utility model; Figure 10 This is a schematic diagram of the structure of the sliding plate of this utility model.
[0016] Reference numerals: 1. Unloading cylinder; 11. Upper cylinder; 12. Lower cylinder; 13. Coal inlet hole; 14. Spiral plate; 141. Protrusion; 2. Feed hopper; 21. Hopper body; 22. Extension; 3. Upper sliding plate; 31. First vertical side plate; 32. First vertical baffle; 4. Connecting support rod; 41. First connecting piece; 42. Second connecting rod; 5. Third connecting rod; 51. Fourth connecting rod; 6. Fifth connecting rod; 61. Sixth connecting rod; 7. Lower sliding plate; 71. Second vertical side plate; 72. Second vertical baffle; 8. First coal mine conveyor belt; 9. Second coal mine conveyor belt; 10. Support leg; 101. Foot. Detailed Implementation
[0017] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 10As will be clearly shown in the detailed description of the embodiments, the structural contents mentioned in the following embodiments are all based on the accompanying drawings.
[0018] Example 1: A detachable modular spiral transfer chute, such as... Figure 1 and 2 As shown, an unloading cylinder 1 is used between the first coal mine conveyor belt 8 and the second coal mine conveyor belt 9, which have a height difference. The unloading cylinder 1 includes an upper cylinder 11 and a lower cylinder 12 integrally formed with and connected to the upper cylinder 11. A coal inlet hole 13 is provided on the top plate of the upper cylinder 11. The lower end of the lower cylinder 12 is open and gradually narrows from top to bottom to form an inwardly narrowed structure. A spiral plate 14 is provided inside the upper cylinder 11. The top end of the spiral plate 14 is connected to the inner wall of the top plate of the upper cylinder 11, and the top of the bearing surface of the spiral plate 14 is located directly below the coal inlet hole 13, so that the lump coal falls into the unloading cylinder 1 through the coal inlet hole 13 and is received by the spiral plate 14. The lump coal spirals down along the spiral plate 14. The bottom end of the spiral plate 14 is flush with the bottom end of the upper cylinder 11. Several protrusions 141 are provided on the top of the bearing surface of the spiral plate 14. The protrusions 141 serve to buffer the impact force of the lump coal. Specifically, when coal transportation begins, the preceding lump coal, upon landing on the spiral plate 14, collides with the protrusions 141. Some coal dust adheres to the protrusions 141 and into the gaps between them (although the preceding lump coal is broken, the overall breakage rate is still reduced compared to the protective effect of the buffer coal dust layer). This causes several protrusions 141 to collectively form a buffer coal dust layer (equivalent to a buffer pad), reducing the gravity load on subsequently transported lump coal and lowering its breakage rate during transportation. Furthermore, as... Figure 6 As shown, the protrusion 141 includes several buffer plates 1411 arranged along the rolling direction of the coal chunks. The buffer plates 1411 are spaced apart, and the coal chunks and debris fill the gaps between the buffer plates 1411, causing the protrusion 141 to form a buffer slag layer. Figure 6 Different, such as Figure 7 As shown, the protrusion 141 includes a plurality of buffer longitudinal vertical plates 1412 arranged along the rolling direction of the lump coal and a plurality of buffer transverse vertical plates 1413 perpendicularly intersecting the plurality of buffer longitudinal vertical plates 1412. The plurality of buffer longitudinal vertical plates 1412 are spaced apart, and the plurality of buffer transverse vertical plates 1413 are spaced apart. A grid is formed between the buffer longitudinal vertical plates 1412 and the buffer transverse vertical plates 1413. The broken lump coal dust will fill the grid, so that the protrusion 141 as a whole forms a buffer slag layer.
[0019] Furthermore, such as Figure 3As shown, a feeding hopper 2 is provided on the upper cylinder 11. The feeding hopper 2 includes a hopper body 21, which is wider at the top and narrower at the bottom. An extension 22 extends downward from the bottom of the hopper body 21. The shape of the extension 22 corresponds to the shape of the coal inlet hole 13, and the extension 22 is inserted into the coal inlet hole 13 so that the feeding hopper 2 is connected to the interior of the upper cylinder 11. Specifically, as... Figure 4 and Figure 8 As shown, the extension 22 is square in shape, and the coal inlet hole 13 is also square in shape. The side length of the extension 22 is smaller than the side length of the coal inlet hole 13 so that the extension 22 can be completely inserted into the upper cylinder 11. In addition, an extension edge (not shown in the figure) extending outward can be provided at the top of the extension 22. Then, the extension edge is installed on the top plate of the upper cylinder 11 by self-tapping screws, thereby achieving the purpose of further fixing the feed hopper 2.
[0020] An upper slide plate 3 is provided above the feed hopper 2. The upper slide plate 3 is inclined and its top end is the coal receiving end and its bottom end is the coal discharging end. First vertical side plates 31 are provided on both sides of the upper slide plate 3, and a first vertical baffle 32 is provided at the top of the upper slide plate. The coal receiving end of the upper slide plate 3 is located directly below the coal discharge end of the first coal mine conveyor belt 8 so that lump coal falls onto the upper slide plate 3 after falling from the first coal mine conveyor belt 8. The coal discharging end of the upper slide plate 3 is located directly above the feed hopper 2 so that lump coal falls into the feed hopper 2 after falling from the coal discharging end of the upper slide plate 3. The first vertical side plates 31 and the first vertical baffle 32 can effectively prevent lump coal from rolling in other directions and ensure that lump coal rolls down the upper slide plate 3 from top to bottom and falls into the feed hopper 2.
[0021] A connecting support rod 4 is provided between the bottom surface of the upper slide plate 3 and the outer surface of the upper cylinder 11. The top end of the connecting support rod 4 is connected to the bottom surface of the upper slide plate 3, and the bottom end of the connecting support rod 4 is connected to the outer surface of the upper cylinder 11. A first connecting rod 41 and a second connecting rod 42 are provided between the first vertical side plates 31 on both sides of the upper slide plate 3 and the support of the first coal mine conveyor belt 8. The setting of the connecting support rod 4, the first connecting rod 41 and the second connecting rod 42 can effectively support the upper slide plate 3. In addition, two connecting support rods 4 (not shown in the figure) can also be set. One connecting support rod 4 connects one of the first vertical side plates 31 to the outer surface of the upper cylinder 11, and the other connecting support rod 4 connects the other first vertical side plate 31 to the outer surface of the upper cylinder 11.
[0022] A sliding plate 7 is installed below the lower cylinder 12. The top of the sliding plate 7 is the coal receiving end, and the bottom of the sliding plate 7 is the coal discharging end. Second vertical side plates 71 are installed on both sides of the sliding plate 7, and a second vertical baffle 72 is installed at the top of the sliding plate 7. The coal receiving end of the sliding plate 7 is located directly below the bottom opening of the lower cylinder 12, so that lump coal falls from the lower cylinder 12 onto the sliding plate 7. The coal discharging end of the sliding plate 7 is located directly above the second coal mine conveyor belt 9, so that lump coal falls from the discharging end of the sliding plate 7 onto the second coal mine conveyor belt 9. The second vertical side plates 71 and the second vertical baffle 72 can effectively prevent lump coal from rolling in other directions, ensuring that lump coal rolls down the sliding plate 7 from top to bottom and falls onto the second coal mine conveyor belt 9.
[0023] A third connecting rod 5 and a fourth connecting rod 51 are provided between the lower cylinder 12 and the second vertical side plates 71 on both sides of the lower slide plate 7. A fifth connecting rod 6 and a sixth connecting rod 61 are provided between the second vertical side plates 71 on both sides of the lower slide plate 7 and the support of the second coal mine conveyor belt 9. It should be noted that when connecting the two ends of the connecting support rod 4, the first connecting rod 41, the second connecting rod 42, the third connecting rod 5, the fourth connecting rod 51, the fifth connecting rod 6 and the sixth connecting rod 61 to the corresponding components, the corresponding self-tapping screws can be used for installation connection. Alternatively, threaded holes can be provided on the corresponding components, and corresponding mounting bolts can be used for installation. Those skilled in the art can realize the installation between the connecting support rod 4, the first connecting rod 41, the second connecting rod 42, the third connecting rod 5, the fourth connecting rod 51, the fifth connecting rod 6 and the sixth connecting rod 61 and the corresponding components as needed.
[0024] The unloading cylinder 1 is provided with at least four support legs 10, and the bottom end of each support leg 10 is provided with a foot 101 for connecting to the coal transport support. During operation, this application can be installed on the coal transport support in the coal yard using anchor bolts. (The coal transport support is a support erected when transporting coal in a coal yard; its specific structure will not be described in detail. It should be noted that the support legs 10 are designed to connect the unloading cylinder 1 to the first coal mine transport belt 8 and the second coal mine transport belt 9 via the coal transport support. Therefore, the structure of the support legs 10 can be configured differently depending on the structure of the coal transport support. That is, the support legs 10 do not necessarily have to be vertically positioned. If a horizontally positioned support leg 10 is easier to connect with the coal transport support, it can also be configured as a horizontal structure, based on the erection structure of the coal transport support. Those skilled in the art can modify the structure of the support legs 10 according to the actual situation.) When coal transport is completed or unloading is not required, this application can be completely disassembled using anchor bolts, making loading and unloading convenient.
[0025] Working principle: In use, the unloading cylinder 1 is installed on the coal yard transport support via the support leg 10, positioning the unloading cylinder 1 between the first coal mine transport belt 8 and the second coal mine transport belt 9. The upper sliding plate 3 is installed on the support of the first coal mine transport belt 8 using appropriate bolts or pins, positioning the upper sliding plate 3 below the first coal mine transport belt 8. The lower sliding plate 7 is installed below the bottom opening of the lower cylinder body 12 of the unloading cylinder 1 using appropriate bolts or pins, with the coal discharge end of the lower sliding plate 7 positioned above the second coal mine transport belt 9. Then, the first coal mine transport belt 8 and the second coal mine transport belt 9 are started to transport lump coal. The first few pieces of lump coal fall onto the upper sliding plate 3 after passing the first coal mine transport belt 8, and then roll down along the upper sliding plate 8 and fall through the feed hopper 2. As the lump coal falls into the unloading cylinder 1, it is caught by the receiving surface of the spiral plate 14 and collides with the protrusions 141 on the receiving surface. The first few lumps of coal will break, and the broken coal dust will stick to the protrusions 141 and the gaps between the protrusions 141, so that the protrusions 141 as a whole form a buffer slag layer (equivalent to a buffer pad). The subsequent lumps of coal will fall onto the buffer slag layer after falling into the unloading cylinder 1. The buffer slag layer plays a role in gravity reduction and has a good buffering effect. After being buffered by the buffer slag layer, the lumps of coal spiral down along the spiral plate 14 to the bottom of the spiral plate 14, and then fall into the lower cylinder 12. Along the inner constriction structure of the lower cylinder 12, it falls from the bottom opening of the lower cylinder 12 onto the lower slide plate 7, and then falls onto the second coal mine conveyor belt 9 along the lower slide plate 7. Furthermore, the first few pieces of coal need to be crushed to form a buffer slag layer only when the application is used for the first time. Once the buffer slag layer is formed, the coal crushing is no longer required in subsequent use of the device, which can greatly reduce the breakage rate during the transportation of coal.
[0026] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.
Claims
1. A detachable modular spiral transfer chute, used between a first coal mine conveyor belt (8) and a second coal mine conveyor belt (9) with a vertical drop, characterized in that, The unloading cylinder (1) includes an upper cylinder (11) and a lower cylinder (12) integrally formed with and interconnected with the upper cylinder (11). A coal inlet hole (13) is provided on the top plate of the upper cylinder (11). The lower end of the lower cylinder (12) is open and gradually narrows from top to bottom to form an inwardly narrowed structure. A spiral plate (14) is provided inside the upper cylinder (11). The top end of the spiral plate (14) is connected to the upper cylinder. The inner wall of the top plate of the cylinder (11) and the top of the receiving surface of the spiral plate (14) are located directly below the coal inlet (13) so that the lump coal falls into the unloading cylinder (1) through the coal inlet (13) and is received by the spiral plate (14). The lump coal spirals down along the spiral plate (14). The bottom end of the spiral plate (14) is flush with the bottom end of the upper cylinder (11). The top of the receiving surface of the spiral plate (14) is provided with several protrusions (141).
2. The detachable modular spiral transfer chute according to claim 1, characterized in that, The upper cylinder (11) is provided with a feeding funnel (2), which includes a funnel body (21). The funnel body (21) is wider at the top and narrower at the bottom, and an extension (22) extends downward from the bottom of the funnel body (21). The shape of the extension (22) corresponds to the shape of the coal inlet hole (13), and the extension (22) is inserted into the coal inlet hole (13) so that the feeding funnel (2) is connected to the interior of the upper cylinder (11).
3. The detachable modular spiral transfer chute according to claim 2, characterized in that, The feed hopper (2) is provided with an upper slide plate (3) above it. The upper slide plate (3) is inclined and the top of the upper slide plate (3) is the coal receiving end and the bottom is the coal discharging end. The upper slide plate (3) is provided with a first vertical side plate (31) on both sides. The upper slide plate (3) is provided with a first vertical baffle (32) at the top. The coal receiving end of the upper slide plate (3) is located directly below the coal discharging end of the first coal mine conveyor belt (8) so that the lump coal falls from the first coal mine conveyor belt (8) onto the upper slide plate (3). The coal discharging end of the upper slide plate (3) is located directly above the feed hopper (2) so that the lump coal falls from the coal discharging end of the upper slide plate (3) into the feed hopper (2).
4. A detachable modular spiral transfer chute according to claim 3, characterized in that, A connecting support rod (4) is provided between the bottom surface of the upper slide plate (3) and the outer surface of the upper cylinder (11). The top end of the connecting support rod (4) is connected to the bottom surface of the upper slide plate (3), and the bottom end of the connecting support rod (4) is connected to the outer surface of the upper cylinder (11). A first connecting rod (41) and a second connecting rod (42) are provided between the first vertical side plate (31) on both sides of the upper slide plate (3) and the support of the first coal mine conveyor belt (8).
5. A detachable modular spiral transfer chute according to claim 1, characterized in that, A sliding plate (7) is provided below the lower cylinder (12). The top of the sliding plate (7) is the coal receiving end, and the bottom of the sliding plate (7) is the coal discharging end. Second vertical side plates (71) are provided on both sides of the sliding plate (7). A second vertical baffle (72) is provided at the top of the sliding plate (7). The coal receiving end of the sliding plate (7) is located directly below the bottom opening of the lower cylinder (12) so that lump coal falls from the lower cylinder (12) onto the sliding plate (7). The coal discharging end of the sliding plate (7) is located directly above the second coal mine conveyor belt (9) so that lump coal falls from the coal discharging end of the sliding plate (7) onto the second coal mine conveyor belt (9).
6. A detachable modular spiral transfer chute according to claim 5, characterized in that, A third connecting rod (5) and a fourth connecting rod (51) are provided between the lower cylinder (12) and the second vertical side plates (71) on both sides of the lower slide plate (7), and a fifth connecting rod (6) and a sixth connecting rod (61) are provided between the second vertical side plates (71) on both sides of the lower slide plate (7) and the support of the second coal mine conveyor belt (9).
7. A detachable modular spiral transfer chute according to claim 1, characterized in that, The unloading cylinder (1) is provided with at least four support legs (10), and the bottom end of the support legs (10) is provided with a foot (101) for connecting the coal conveying support.
8. A detachable modular spiral transfer chute according to claim 1, characterized in that, The protrusion (141) includes a plurality of buffer plates (1411) arranged along the rolling direction of the coal, and the plurality of buffer plates (1411) are spaced apart.
9. A detachable modular spiral transfer chute according to claim 1, characterized in that, The protrusion (141) includes a plurality of buffer longitudinal vertical plates (1412) arranged along the rolling direction of the coal and a plurality of buffer transverse vertical plates (1413) perpendicularly intersecting the plurality of buffer longitudinal vertical plates (1412). The plurality of buffer longitudinal vertical plates (1412) are arranged at intervals, and the plurality of buffer transverse vertical plates (1413) are arranged at intervals.