A coal shovel structure type coal mining machine drum

Abstract

The utility model discloses a kind of shovel coal structure formula coal cutter drum, it is related to coal mining equipment field, to solve the problem of low efficiency of existing drum coal loading, many floating coal accumulations.The drum includes drum body and helical blade of helical arrangement, and shovel coal rib is equipped between adjacent blades;Rib is designed according to blade parameter, and extend from blade outer edge downward to inward, present outer high inner low, front high rear low inclined structure, and form half-closed shovel (outer side is closed, inner side is passed coal conveying passage) with blade.The structure can be actively shovel into machine channel floating coal, guide coal to fall into coal conveying passage, prevent coal flow leakage, also can enhance coal flow interaction force, speed up flow rate, reduce "dead cycle" coal amount.

Description

Technical Field

[0001] This application relates to the field of coal mining equipment technology, specifically to a coal shovel structure coal mining machine drum. Background Technology

[0002] In underground coal mining, the double-drum coal mining machine is the core mining equipment in the fully mechanized mining face. The spiral drum of the coal mining machine, as the main cutting structure, directly determines the production efficiency of the fully mechanized mining face by its coal dropping, loading and crushing effects. Among these effects, the coal loading effect is a key influencing factor and must be based on the premise of not affecting the normal movement of the scraper conveyor.

[0003] In existing technologies, the coal charging efficiency of spiral drums is constrained by multiple factors:

[0004] 1. Structural limitations: Insufficient space for coal to pass under the rocker arm of the coal mining machine, excessive distance between the drum and the inner side of the scraper conveyor chute, and excessive height of the chute sidewalls, all of which obstruct the coal flow path.

[0005] 2. Complex working conditions: The working face has a large dip angle or downward mining angle, and the geological structure is unstable. Top coal caving working faces are prone to roof spalling and leakage, which will lead to coal flow scattering and accumulation.

[0006] 3. Operational differences: The varying levels of proficiency among the personnel operating the coal mining machine in the fully mechanized mining team further exacerbate the fluctuations in coal loading efficiency.

[0007] The aforementioned factors result in over 90% of existing coal mining machine augers only loading about 80% of the coal falling volume, with floating coal in the machine chute extending approximately 0.5 meters or more above the top surface of the chute when horizontally distributed. Although technical improvements have been made (such as negative-angle reinforcing plates, the addition of guide plates, and streamlined drums), the coal loading capacity has only increased to 60%-70% of the falling volume, and the floating coal height remains at 0.3-0.4 meters, failing to fundamentally solve the problem.

[0008] In the top coal caving face, it is necessary to "follow the machine and move the conveyor". If the scraper conveyor moves too slowly, it will cause side spalling and roof leakage, and the machine passage will be filled with floating coal.

[0009] In the large-scale submerged mining face, the amount of bottom breaking by the drum is relatively large, and floating coal is prone to "slipping" when the scraper conveyor is pushed.

[0010] Excessive floating coal in the machine channel will increase the amount of lump coal that needs to be crushed by the drum in the secondary / multiple stages, generating a large amount of dust and increasing the proportion of fine coal, which will pollute the working environment and reduce the economic benefits for customers.

[0011] Therefore, continuously optimizing the spiral drum structure and improving the coal charging effect are key requirements for improving the efficiency of fully mechanized mining and the core competitiveness of products. Utility Model Content

[0012] In view of the shortcomings of the existing technology, the purpose of this application is to provide a coal shovel structure coal mining machine drum to solve the problems mentioned in the background art.

[0013] According to one aspect of this application, a coal-shoveling structure coal mining machine drum includes a drum body and a plurality of spiral blades arranged spirally along the circumference of the drum body. A coal conveying channel is formed between adjacent spiral blades, and at least one coal-shoveling rib is provided between each two adjacent spiral blades. The design parameters of the coal-shoveling rib match the parameters of the spiral blades, and the coal-shoveling rib extends downward from the outer edge of the spiral blade along the blade surface and towards the inner side of the drum body. The coal-shoveling rib has an oblique structure with the outer side higher than the inner side and the front side higher than the rear side, and together with the two adjacent spiral blades, it forms a semi-enclosed bucket structure. The outer side of the bucket structure is closed, and its inner side is connected to the coal conveying channel.

[0014] Preferably, 1-3 coal shovel plates are provided at intervals along the spiral direction between every two adjacent spiral blades, and the spacing between adjacent coal shovel plates is adapted to the coal particle size.

[0015] Preferably, the coal shovel rib plate is fixed to the spiral blade by welding or bolting, and the edge of the coal shovel rib plate is in close contact with the surface of the spiral blade.

[0016] Preferably, the cross-sectional shape of the coal shovel is rectangular, trapezoidal, or arc-shaped; wherein the arc-shaped coal shovel is used to reduce the resistance to coal flow.

[0017] Preferably, the outer edge height of the coal shovel plate is consistent with the outer edge height of the spiral blade, and its inner height is 40%-60% of the inner height of the spiral blade, forming a height difference of 300-400mm.

[0018] Preferably, along the rotation direction of the drum, the front end of the coal shovel is 30-50mm higher than the rear end, forming a guide angle that is higher at the front and lower at the rear.

[0019] Preferably, each of the spiral blades has a plurality of cutting systems uniformly arranged along its outer edge.

[0020] The advantages of this application compared to existing technologies are as follows: This application provides a coal-shoveling structure for a coal mining machine drum. By adding angled coal-shoveling ribs between the spiral blades, the ribs are designed according to the spiral blade parameters and arranged downwards and inwards from the outer edge of the blades, forming a semi-enclosed bucket structure. This allows floating coal in the machine channel to be shoveled and collected within the blade's coal conveying channel. Because the ribs are arranged obliquely with a higher outer edge and lower inner edge, and a higher front and lower rear, the falling coal can flow into the blade's coal conveying channel during drum cutting. Since the ribs are a semi-enclosed structure within the spiral blade's coal conveying channel, with the outer side closed and the inner side connected, it prevents large amounts of coal from being prematurely thrown into the machine channel along the outer edge of the blades during transport, increasing the effective coal loading capacity within the blade's coal conveying channel. Because the ribs have a coal-shoveling function, they enhance the interaction force of the coal flow inside the blades, accelerate the coal flow velocity, and reduce the amount of coal trapped in a "dead loop" inside the blades. This coal-shoveling structure is a completely new type of spiral drum coal-loading structure for coal mining machines. Attached Figure Description

[0021] Figure 1 This is a perspective view of a coal-shoveling structure type coal mining machine drum according to an embodiment of this application.

[0022] Figure 2 This is a front view structural diagram of a coal-shoveling structure type coal mining machine drum according to an embodiment of this application.

[0023] Reference numerals: 1. Drum body; 2. Spiral blade; 3. Coal conveying channel; 4. Coal shovel ribs; 5. Cutting system. Detailed Implementation

[0024] To make the content of this application easier to understand, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the accompanying drawings. Figure 1 In the context of direction, the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] like Figure 1 and Figure 2 As shown, a coal-shoveling structure coal mining machine drum includes a drum body 1 and multiple spiral blades 2 arranged spirally along the circumference of the drum body 1. Each spiral blade 2 has a cutting system 5 evenly arranged along its outer edge. The cutting system includes several cutting teeth, which are installed on the spiral blades for directly cutting coal and rock. A coal conveying channel 3 is formed between adjacent spiral blades 2. One to three coal-shoveling stiffeners 4 are arranged at intervals along the spiral direction between every two adjacent spiral blades 2. The spacing between adjacent coal-shoveling stiffeners 4 is adapted to the coal particle size to prevent coal jamming or leakage.

[0026] The design parameters of the coal shovel rib 4 are matched with the parameters of the spiral blade 2 (including the spiral helix angle, pitch, and blade height) to ensure a continuous coal flow path. The coal shovel rib 4 extends downward (towards the radial inner side of the drum) from the outer edge of the spiral blade 2 (away from the drum axis) along the blade surface and towards the inner side of the drum body 1 (close to the drum axis). The coal shovel rib 4 has an inclined structure with the outer side higher than the inner side and the front higher than the rear, which can shovel the floating coal in the machine channel and gather it in the coal conveying channel 3 of the blade.

[0027] Specifically, the outer edge height of the coal shovel rib plate 4 is consistent with the outer edge height of the spiral blade 2, and its inner height is 40%-60% of the inner height of the spiral blade 2, forming a height difference of 300-400mm. Along the rotation direction of the drum, the front end height of the coal shovel rib plate 4 is 30-50mm higher than the rear end height, forming a guide angle that is higher in the front and lower in the back.

[0028] The shovel rib 4 and the two adjacent spiral blades 2 together form a semi-enclosed bucket structure. The outer side of the bucket structure (near the outer edge of the blades) is closed, while its inner side (near the drum body 1) is connected to the coal conveying channel 3. During the drum cutting process, the falling coal can flow into the coal conveying channel 3 of the blades at the angle of the shovel rib 4, which not only achieves active coal shoveling but also avoids coal flow leakage. In this design, since the shovel rib 4 is a semi-enclosed structure with the outer side closed and the inner side connected within the coal conveying channel 3 of the spiral blades 2, it can prevent a large amount of coal from being thrown into the machine channel along the outer edge of the blades in advance during the conveying process, thereby increasing the effective coal loading capacity within the coal conveying channel 3 of the blades. In addition, the shovel rib 4 has the function of shoveling coal, enhancing the interaction force of the coal flow inside the blades, accelerating the flow rate of the coal, and reducing the amount of coal in the "dead loop" inside the blades.

[0029] The coal shovel rib plate 4 is connected and fixed to the spiral blade 2 by submerged arc welding (weld height ≥ 10mm) or high-strength bolts, and the edge of the coal shovel rib plate 4 is closely fitted to the surface of the spiral blade 2 to ensure impact resistance.

[0030] The cross-sectional shape of the coal shovel rib 4 is rectangular, trapezoidal or arc-shaped, among which the arc-shaped coal shovel rib 4 is used to reduce the resistance of coal flow and improve the conveying efficiency.

[0031] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, without departing from the spirit and scope defined by the claims of this application.

Claims

1. A coal-shoveling structure type coal mining machine drum, comprising a drum body (1) and a plurality of spiral blades (2) arranged spirally along the circumference of the drum body (1), wherein a coal conveying channel (3) is formed between adjacent spiral blades (2), characterized in that: At least one shovel plate (4) is provided between each two adjacent spiral blades (2); the design parameters of the shovel plate (4) are matched with the parameters of the spiral blade (2), and the shovel plate (4) extends downward from the outer edge of the spiral blade (2) along the blade surface and toward the inner side of the drum body (1); The coal shovel rib plate (4) has an oblique structure with the outside higher than the inside and the front higher than the back, and together with the two adjacent spiral blades (2), it forms a semi-enclosed bucket structure; the outer side of the bucket structure is closed and its inner side is connected to the coal conveying channel (3).

2. The coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, One to three coal shovel plates (4) are spaced apart along the spiral direction between each pair of adjacent spiral blades (2), and the spacing between adjacent coal shovel plates (4) is adapted to the coal particle size.

3. The coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, The coal shovel rib plate (4) is fixed to the spiral blade (2) by welding or bolting, and the edge of the coal shovel rib plate (4) is closely attached to the surface of the spiral blade (2).

4. The coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, The cross-sectional shape of the coal shovel rib (4) is rectangular, trapezoidal or arc-shaped; wherein the arc-shaped coal shovel rib (4) is used to reduce the resistance of coal flow.

5. A coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, The outer edge height of the coal shovel rib plate (4) is consistent with the outer edge height of the spiral blade (2), and its inner height is 40%-60% of the inner height of the spiral blade (2), forming a height difference of 300-400mm.

6. A coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, Along the rotation direction of the drum, the front end of the coal shovel rib (4) is 30-50mm higher than the rear end, forming a guide angle that is higher in the front and lower in the back.

7. A coal-shoveling structure type coal mining machine drum according to claim 1, characterized in that, Each of the spiral blades (2) is uniformly provided with a cutting system (5) along its outer edge.

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