A type of integrally cast toothed rail with central groove for hard rock working faces

Abstract

This invention relates to the field of scraper conveyor technology, and more particularly to a cast-in-place central groove for a toothed rail in hard rock working faces. The technical problem is that existing scraper conveyors suffer from significant wear in the central groove, easy damage to the toothed rail, large offset torque during drive, and limited working height of the coal mining machine. The technical solution is a cast-in-place central groove for a toothed rail in hard rock working faces, comprising a square-hole plate, a bottom plate, a plow plate, a pusher lug, a middle plate, groove sides, a guide mechanism, a cast-in-place toothed rail, and reinforcing ribs. This invention, by employing a 3D net-formed integrated cast-in-place toothed rail, cast integrally onto the side of the central groove shovel plate, reduces the height of the coal mining machine while increasing its stability and reducing its reactive power consumption. It eliminates the need for accessories such as toothed rail pins and toothed rail pin stops, reducing operating costs for the mine and minimizing potential failure points. This solves the problems of significant wear in the central groove, easy damage to the toothed rail, large offset torque during drive, and limited working height of the coal mining machine in existing scraper conveyors.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, and more particularly to a cast-in-place central groove for a toothed rail used in hard rock working faces. Background Technology

[0002] Scraper conveyors are key equipment in the mining process of hard rock faces. With the rapid development of hard rock mining methods in my country and the continuous increase in rock hardness, the wear and damage to scraper conveyors are becoming more severe. Coal mining machines use toothed rail traction when traveling, and the reliability and service life of scraper conveyors seriously restrict the safe and efficient mining of mines.

[0003] The existing central slotted toothed rail seat and slot side are welded composite structures with low weld strength. Moreover, the fit between the central slotted toothed rail seat and the toothed rail requires leaving space for the coal mining machine to travel, and the height cannot be reduced, which limits the height of the coal mining machine. The central slotted toothed rail is located on the old mine side, which will generate a large offset torque when the coal mining machine is operating, affecting the stability of the coal mining machine. It is necessary to equip it with connecting parts such as toothed rail pins and toothed rail pin stops, which is troublesome to install and use, has poor stability, and has wear loss, increasing the cost of machine use.

[0004] Therefore, in response to the shortcomings of the existing scraper conveyor's central trough mentioned above, the central trough structure is improved by adopting a cast-in-place structure that differs from the traditional central trough structure. This reduces the height of the coal mining machine's face while increasing the stability of the coal mining machine, reducing the reactive power consumption of the coal mining machine, eliminating a large number of accessories, and reducing the operating costs for the mine. Summary of the Invention

[0005] In order to overcome the problems of large wear in the middle trough of the existing scraper conveyor, easy damage to the toothed rail, large offset torque during drive, and limited working height of the coal machine.

[0006] The technical solution of the present invention is as follows: a cast-in-place central groove for a toothed rail in a hard rock working face, comprising a square hole plate, a bottom plate, a plow plate, a pusher ear, a middle plate, groove sides, a guide mechanism, a cast-in-place toothed rail, and reinforcing ribs; the bottom plate is laid in the coal mining area of ​​the hard rock working face and several are axially assembled along the extension direction of the coal wall; the square hole plate is integrally cast on the old pit side of the bottom plate facing the main body of the coal mining machine; the plow plate is integrally cast on the side of the bottom plate facing the coal wall; the pusher ear is integrally cast on the side wall of the square hole plate and connected to the horizontal push-pull power output unit of the coal mining machine; groove sides are integrally cast on both sides of the upper end of the middle plate; the middle plate and groove sides are asymmetrical structures and integrally cast on the upper end of the bottom plate; a guide mechanism is integrally cast on the side of the square hole plate facing the middle plate; the cast-in-place toothed rail is integrally cast between the upper end of the plow plate and the upper end of the adjacent groove side side; reinforcing ribs are integrally cast between the groove side side near the old pit side and the upper surface of the bottom plate.

[0007] Preferably, the middle plate, sidewalls, perforated plate, bottom plate, and plow plate constitute the overall structure of the middle trough, and the integrally cast gear rail is cast on the side facing the coal wall, working in conjunction with the guide mechanism as the walking guide unit of the coal mining machine.

[0008] As a preferred option, the asymmetrical structure of the middle plate and the sidewall includes an upper structure, which is the sidewall located on the old pit side. The upper structure has a 3×110mm chamfer and the length of the groove at this location is 1504mm. The chamfer design and groove length design of the upper structure form an asymmetrical structure with the sidewall on one side of the coal wall, which facilitates the meshing of the traveling teeth when the middle groove swings.

[0009] As a preferred option, the asymmetrical structure of the middle plate and the sidewall includes the corner section structure. The corner section structure is the junction of the sidewall and the middle plate on the old pit side. The corner section structure has a length of 1510mm. The design of the length of the corner section structure and the sidewall on the coal wall side form an asymmetrical structure at the junction of the middle plate and the sidewall, which facilitates the meshing of the traveling teeth when the middle plate swings at an angle.

[0010] As a preferred option, the asymmetrical structure of the middle plate and the sidewall also includes an intermediate section structure, which is a 1510-1500mm inclined-straight transition section. The length of the bottom plate and the sidewall facing the coal wall is 1500mm. The design of the length of the intermediate section structure constitutes an asymmetrical structure, which facilitates the meshing of the traveling teeth when the middle section swings.

[0011] Preferably, the guide mechanism is located below the coal mining machine body facing the old pit side. The coal mining machine body moves axially along the guide mechanism and the integral cast toothed rail. When the coal mining machine is operating, a large offset torque will be generated. Using the guide mechanism and the integral cast toothed rail together as the guiding unit of the coal mining machine improves the stability of the coal mining machine.

[0012] As a preferred option, the corner where the perforated plate meets the bottom plate is chamfered at 45 degrees. The perforated plate and the sliding lug are driven by a horizontal push-pull power output unit to move horizontally from the old pit side to the coal wall side. The chamfer design at the junction of the perforated plate and the bottom plate allows the horizontal force to be dispersed at the chamfer when the perforated plate is under stress, thus preventing the perforated plate from deforming.

[0013] As a preferred option, both the central slot and the integrally cast gear rail are made of TNZ bainitic steel. The integrally cast gear rail is a 3D net-form integral casting. The overall tensile strength of TNZ bainitic steel is ≥1300MPa, the overall hardness is ≥42HRC, and the wear resistance is more than 1.6 times that of imported HARDOX500 wear-resistant steel, which enhances the overall service life of the central slot and the gear rail.

[0014] As a preferred option, the integral cast gear rail is compatible with the gear rail of the coal mining machine. The integral cast gear rail is equipped with a coal leakage hole structure. The design of the coal leakage hole on the integral cast gear rail prevents coal blocks from clogging the integral cast gear rail during coal mining operations, which would cause the coal mining machine to run poorly.

[0015] As a preferred option, the upper end of the trough side on one side of the coal wall, the upper end of the plow plate, and the integral casting junction of the integral casting toothed rail all have an upward-raised arched structure. The arched structure disperses the force, making the structure between the upper end of the trough side, the plow plate, and the integral casting toothed rail on the old pit side more robust and stronger in resisting external forces and preventing deformation.

[0016] As a preferred option, the reinforcing rib has an L-shaped structure, with the horizontal part integrally cast with the side wall of the trough on the old pond side, and the lower end of the vertical part integrally cast with the upper surface of the bottom plate. The reinforcing rib plays a supporting role on the side wall of the trough on the coal wall side, making the overall structure of the middle trough more stable.

[0017] The beneficial effects of this invention are:

[0018] 1. The toothed rail adopts a 3D net-formed integrated casting structure. The toothed rail is cast on the side of the middle trough shovel plate, which reduces the height of the coal mining machine surface, increases the stability of the coal mining machine, and reduces the reactive power consumption of the coal mining machine; the toothed rail pin, toothed rail pin stop and other accessories are eliminated, reducing the mining party's operating costs and reducing the number of failure points.

[0019] 2. Both the gear rail and the central groove are made of TNZ bainitic steel, with an overall tensile strength ≥1300MPa, an overall hardness ≥42HRC, and wear resistance more than 1.6 times that of imported HARDOX500 wear-resistant steel, thus enhancing the overall lifespan of the central groove and gear rail.

[0020] 3. The middle groove adopts an asymmetrical structure, which can keep the sudden change value of the toothed track pitch within 7mm under the condition of horizontal swing angle ±1° and vertical swing angle ±3°, thus meeting the meshing conditions of the coal mining machine's traveling teeth. Attached Figure Description

[0021] Figure 1 The diagram shown is a three-dimensional structural schematic of the first three-dimensional structure of the central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0022] Figure 2 The diagram shown is a three-dimensional structural schematic of the central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0023] Figure 3 The diagram shown is a top view of the central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0024] Figure 4 The diagram shown is a front view of the central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0025] Figure 5 The diagram shown is a side view of the central groove structure of the integrally cast toothed rail for hard rock working face according to the present invention.

[0026] Figure 6 The diagram shown is an enlarged first three-dimensional structural schematic of the detailed central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0027] Figure 7 The diagram shown is an enlarged second three-dimensional structural schematic of the central groove of the integrally cast toothed rail for hard rock working faces according to the present invention;

[0028] Figure 8 The diagram shown is a schematic of the asymmetrical design structure of the central groove of the integrally cast toothed rail for hard rock working face according to the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1. Middle plate; 2. Groove side; 3. Guide mechanism; 4. Square hole plate; 5. Bottom plate; 6. Integral cast gear rail; 7. Plow plate; 8. Reinforcing rib; 9. Pushing lug; 10. Upper structure; 11. Corner section structure; 12. Middle section structure. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please see Figure 1-7 This invention provides an embodiment: a cast-in-place central groove for a toothed rail in a hard rock working face, comprising a square hole plate 4, a bottom plate 5, a plow plate 7, a pusher ear 9, a middle plate 1, a groove side 2, a guide mechanism 3, a cast-in-place toothed rail 6, and reinforcing ribs 8; the bottom plate 5 is laid in the coal mining area of ​​the hard rock working face and several are axially assembled along the extension direction of the coal wall; the square hole plate 4 is integrally cast on the old pit side of the bottom plate 5 facing the main body of the coal mining machine; the plow plate 7 is integrally cast on the side of the bottom plate 5 facing the coal wall; the pusher ear 9 is integrally cast on the side wall of the square hole plate 4 and connected to the horizontal push-pull power output unit of the coal mining machine; the upper end of the middle plate 1... The two sides are integrally cast with groove sides 2. The middle plate 1 and groove sides 2 are asymmetrical structures and integrally cast on the upper end of the bottom plate 5. The square hole plate 4 facing the middle plate 1 has an integrally cast guide mechanism 3. The integrally cast toothed rail 6 is cast between the upper end of the plow plate 7 and the upper end of the adjacent groove side 2. The side of the groove side 2 near the old pit and the upper surface of the bottom plate 5 have an integrally cast reinforcing rib 8. The middle plate 1, groove sides 2, square hole plate 4, bottom plate 5 and plow plate 7 constitute the overall structure of the middle groove. The integrally cast toothed rail 6 is integrally cast on the side facing the coal wall and works with the guide mechanism 3 as the walking guide unit of the coal mining machine.

[0032] Please see Figure 8In this embodiment, the asymmetrical structure of the middle plate 1 and the channel side 2 includes an upper structure 10, which is the channel side 2 located on the old pit side. The upper structure 10 has a 3×110mm chamfer, and the channel length at this location is 1504mm. The chamfer design and channel length design of the upper structure 10 form an asymmetrical structure with the channel side 2 on the coal wall side, facilitating the meshing of the traveling teeth when the middle channel is tilted. The asymmetrical structure of the middle plate 1 and the channel side 2 also includes a corner segment structure 11, which is the junction of the channel side 2 on the old pit side and the middle plate 1, where the corner segment structure 11 is cast integrally. The corner segment structure 11 has a groove length of 1510mm. The groove length design of the corner segment structure 11 is compared with the groove side 2 on one side of the coal wall to form an asymmetrical structure at the junction of the integrally cast middle plate 1, which facilitates the meshing of the traveling teeth when the middle groove swings at an angle. The asymmetrical structure of the middle plate 1 and the groove side 2 also includes the intermediate segment structure 12, which is a 1510-1500mm inclined straight transition section. The bottom plate 5 and the groove side 2 facing the coal wall have a length of 1500mm. The groove length design of the intermediate segment structure 12 forms an asymmetrical structure, which facilitates the meshing of the traveling teeth when the middle groove swings at an angle.

[0033] Please see Figure 1-5 In this embodiment, the guide mechanism 3 is located below the coal mining machine body facing the old pit side. The coal mining machine body moves axially along the guide mechanism 3 and the integrally cast toothed rail 6. The corner of the square hole plate 4 and the bottom plate 5 is a 45-degree chamfer structure. The square hole plate 4 and the push lug 9 are driven by the push-pull power output unit to move horizontally from the old pit side to the coal wall side. The central trough and the integrally cast toothed rail 6 are both made of TNZ bainitic steel. The integrally cast toothed rail 6 is a 3D net-form integral casting. The integrally cast toothed rail 6 is adapted to the toothed rail of the coal mining machine. The integrally cast toothed rail 6 is provided with a coal leakage hole structure. The upper end of the trough side 2 on the coal wall side and the upper end of the plow plate 7 are connected to the integrally cast toothed rail 6 with an upward arched structure. The reinforcing rib 8 is an L-shaped structure, and the horizontal part is integrally cast with the side wall of the trough side 2 on the old pit side. The lower end of the vertical part is integrally cast with the upper surface of the bottom plate 5. When the coal mining machine is operating, it will generate a large offset torque. Together with the integrally cast toothed rail 6, the 3 and the 6 form the guiding unit of the coal mining machine, improving its stability. The chamfer design at the junction of the square hole plate 4 and the bottom plate 5 allows the horizontal force to be dispersed at the chamfer when the square hole plate 4 is under stress, preventing deformation. The TNZ bainitic steel material has an overall tensile strength ≥1300MPa, an overall hardness ≥42HRC, and wear resistance more than 1.6 times that of imported HARDOX500 wear-resistant steel, enhancing the overall lifespan of the middle groove and the toothed rail. The coal leakage hole design on the integrally cast toothed rail 6 prevents coal blocks from clogging the integrally cast toothed rail 6 during coal mining operations, thus preventing the coal mining machine from running poorly. The arched structure disperses the force, making the structure between the upper end of the groove side 2 on the old pit side, the plow plate 7, and the integrally cast toothed rail 6 more robust and stronger in resisting external forces and preventing deformation. The reinforcing rib 8 supports the side wall of the groove side 2 on the coal wall side, making the overall structure of the middle groove more stable.

[0034] The user uses 3D net-forming integral casting technology to cast the middle plate 1, channel side 2, square hole plate 4, bottom plate 5, and plow plate 7 into one piece without using any fixing accessories. The casting material is TNZ bainitic steel with high strength and high wear resistance.

[0035] The upper structure 10, the corner section structure 11, and the middle section structure 12 are cast into an asymmetrical structure, so that the ends of the two adjacent middle slots are fully connected, which facilitates the mutual meshing of the traveling teeth when the middle slots swing, and meets the meshing conditions of the traveling teeth of the coal mining machine.

[0036] The coal mining machine drives the central trough to move towards the coal wall. The coal mining machine moves axially along the guide mechanism 3 and the integral cast toothed rail 6, forming a cutting force on the coal wall and cutting off the coal blocks. The coal blocks on the coal wall fall onto the central plate 1 and are conveyed to one side by the conveyor.

[0037] Through the above steps, the integrally cast toothed rail 6 adopts a 3D net-forming integrated casting structure. The toothed rail is integrally cast on the side of the trough 2 on the side of the central trough coal plow plate 7. This reduces the height of the coal mining machine face, increases the stability of the coal mining machine, and reduces the reactive power consumption of the coal mining machine. It also eliminates accessories such as toothed rail pins and toothed rail pin stops, reducing the operating cost for the mine and reducing the number of failure points. This solves the problems of large wear in the central trough of the existing scraper conveyor, easy damage to the toothed rail, large offset torque during drive, and limited working height of the coal mining machine.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cast-in-place central groove for a toothed rail in a hard rock working face, comprising a square hole plate (4), a bottom plate (5), a coal plow plate (7), and a pushing lug (9); characterized in that: It also includes a middle plate (1), a sidewall (2), a guide mechanism (3), a cast-in-place gear rail (6), and reinforcing ribs (8); the bottom plate (5) is laid in the coal mining area of ​​the hard rock working face and is axially assembled in several units along the coal wall extension direction; the square hole plate (4) is integrally cast on the old pit side of the bottom plate (5) facing the main body of the coal mining machine; the plow plate (7) is integrally cast on the side of the bottom plate (5) facing the coal wall; and the pusher ear (9) is integrally cast on the side wall of the square hole plate (4) and is connected to the horizontal push-pull power output of the coal mining machine. Units are connected. The upper sides of the middle plate (1) are integrally cast with groove sides (2). The middle plate (1) and groove sides (2) are asymmetrical structures and integrally cast on the upper end of the bottom plate (5). The square hole plate (4) facing the middle plate (1) is integrally cast with a guide mechanism (3). The integrally cast toothed rail (6) is integrally cast between the upper end of the plow plate (7) and the upper end of the side of the adjacent groove side (2). The side of the groove side (2) near the old pond and the upper surface of the bottom plate (5) are integrally cast with reinforcing ribs (8). The asymmetrical structure of the middle plate (1) and the side wall (2) includes the upper structure (10), the corner section structure (11) and the middle section structure (12). The upper structure (10) is the side wall (2) located on the old pond side. The upper structure (10) has a 3×110mm chamfer and the length of the groove is 1504mm. The corner section structure (11) is the connection between the side wall (2) located on the old pond side and the middle plate (1) cast integrally. The corner section structure (11) has a groove length of 1510mm. The middle section structure (12) is a 1510~1500mm inclined straight transition section. The bottom plate (5) and the side wall (2) facing the coal wall have a length of 1500mm. The asymmetrical structure used in the middle slot can keep the sudden change value of the toothed track pitch within 7mm under the conditions of horizontal swing angle ±1° and vertical swing angle ±3°, which meets the meshing conditions of the coal mining machine's traveling teeth.

2. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The guide mechanism (3) is located below the coal mining machine body facing the old pond side, and the coal mining machine body moves axially along the guide mechanism (3) and the integral cast toothed rail (6).

3. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The corner where the square hole plate (4) intersects with the bottom plate (5) is a 45-degree chamfer structure. The square hole plate (4) and the push ear (9) are driven by the horizontal push-pull power output unit to move horizontally from the old pit side to the coal wall side.

4. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The central slot and the integral cast gear (6) are both made of TNZ bainitic steel, and the integral cast gear (6) is a 3D net-form integral casting.

5. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The integrally cast toothed rail (6) is adapted to the toothed rail of the coal mining machine, and the integrally cast toothed rail (6) is provided with a coal leakage hole structure.

6. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The upper end of the groove side (2) on one side of the coal wall, the upper end of the coal plow plate (7) and the integral casting of the integral casting toothed rail (6) all have an upward arched structure.

7. The integrally cast central groove of a toothed rail for hard rock working faces according to claim 1, characterized in that: The reinforcing rib (8) is an L-shaped structure, and the horizontal part is integrally cast with the side wall of the trough (2) on the side of the old pond, and the lower end of the vertical part is integrally cast with the upper surface of the bottom plate (5).

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