Coal mine screening equipment and ore dressing method using X-ray imaging to identify gangue

Abstract

The present invention relates to the technical field of coal mine screening, and specifically to a coal mine screening equipment and a ore dressing method for identifying gangue by X-ray imaging, comprising a hopper surrounded by a side plate assembly and an adjusting baffle, and a tray assembly and an X-ray device located below the hopper, wherein the adjusting baffle can move laterally relative to the side plate assembly to adjust the size of a drop opening below to adapt to the screening of gangue and coal ore of different sizes, and the coal ore and gangue in the hopper are discharged from the drop opening under stress by cooperating with the adjusting baffle through an extrusion assembly, so that the coal ore and gangue can be ensured to fall onto the tray assembly in an orderly and single-layer manner, and then the coal ore and gangue on the tray assembly can be identified, located and separated by the X-ray device.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine screening, and in particular to a coal mine screening device and a ore dressing method for identifying gangue by using X-ray imaging. Background Art

[0002] Gangue is solid waste discharged during coal mining and processing, also known as coal gangue. In the process of coal formation, some non-coal materials, such as rocks and clay, are mixed in. In the process of coal mining, these non-coal materials will be mined together with coal, and after screening and other processing, gangue is formed. Gangue usually contains a variety of minerals, such as quartz, feldspar, clay minerals, etc., and may also contain a small amount of heavy metal elements. It is generally harder than coal and has a larger bulk density.

[0003] The methods for separating coal ore and gangue usually include manual selection and mechanical screening. Gravity separation can be used to separate coal and gangue by utilizing the density difference between them. Common equipment includes jigs, heavy medium separators, etc. Fine-grained coal and gangue can also be separated by flotation. Screening can also be used to grade coal and gangue using sieves of different apertures. In addition, there are intelligent sorting methods that use advanced sensor technology (such as X-rays, gamma rays, visible light, etc.) and image processing technology to identify and sort coal and gangue. Sensors can detect the physical properties of materials such as density and elemental composition. Image processing systems can identify materials based on their shape, color and other characteristics. After identifying the gangue, the gangue can be separated from the coal flow by jets, robotic arms and other methods. In the prior art, when using sensor technologies such as X-rays to identify gangue, it is difficult to locate the gangue and coal ore on the conveyor line. The accumulated gangue and coal ore will cause problems such as misalignment and misjudgment in identification. Moreover, when the coal ore and gangue are spread flat in the area to be detected, it is difficult to place the coal ore and gangue in an orderly manner on the conveyor line due to the size and irregular shape of the coal ore and gangue. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a coal mine screening equipment and a ore dressing method for identifying gangue by X-ray imaging. The coal ore and gangue in the hopper are discharged from the drop port under stress by cooperating with an extrusion assembly to ensure that the coal ore and gangue fall onto the tray assembly in an orderly and single layer, and then the coal ore and gangue on the tray assembly can be identified, located and separated by an X-ray device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A coal mine screening device for identifying gangue by X-ray imaging, comprising a hopper surrounded by a side plate assembly and an adjusting baffle, and a tray assembly and an X-ray device located below the hopper, wherein the adjusting baffle can move laterally relative to the side plate assembly to adjust the size of the drop opening below to adapt to the screening of gangue and coal ore of different sizes; an extrusion assembly is arranged on one surface of the side plate assembly relative to the adjusting baffle, and a hammer device is arranged on the outer side of the extrusion assembly, and the extrusion assembly is driven to move back and forth by the hammer device to squeeze the coal ore and gangue in the hopper Stone; a discharging assembly is also provided at the lower part of the adjusting baffle at the dropping port, and the discharging assembly can rotate relative to the adjusting baffle to change the spacing of the dropping port, so that the coal ore and gangue are discharged under force; a tray assembly is provided below the dropping port of the hopper, and the coal ore and gangue inside the hopper fall onto the tray assembly in a single layer through the cooperation of the extrusion assembly and the discharging assembly, and the coal ore and gangue on the tray assembly are identified and selected through an X-ray device arranged at the same height as the tray assembly.

[0007] Furthermore, the side plate assembly includes an inclined plate arranged opposite to the adjusting baffle, and side vertical plates arranged on both sides of the inclined plate. The inclined plate is provided with a support platform for installing the extrusion assembly. The extrusion assembly extends into the hopper through a pushing port arranged on the inclined surface of the inclined plate. A reinforcing rib plate is also provided on the inclined plate on the back side of the blanking port.

[0008] Furthermore, the adjustment baffle includes a movable plate, a guide assembly, a cylinder seat, a driving cylinder, reinforcing ribs, an inclined surface, a mounting portion, a rotating shaft and an anti-slip strip; the two sides of the movable plate are respectively connected to the side vertical plates on both sides of the side plate assembly through the guide assembly, and a cylinder seat is provided in the middle part of the outer side of the movable plate, and the cylinder seat is connected to the movable end of the driving cylinder, and the movable plate is driven to move by the driving cylinder to change the size of the drop opening below the hopper; a plurality of reinforcing ribs are provided on the outer side of the movable plate, and the upper part of the end surface of the movable plate facing the inclined plate is an inclined surface, and the inclined surface is provided with a transversely extending anti-slip strip; the mounting portion is located below the inclined surface of the movable plate, and a rotating shaft is provided in the mounting portion, and the discharging assembly is rotatably provided on the rotating shaft.

[0009] Furthermore, the discharging assembly includes a movable plate, a hinged seat and an elastic part, the hinged seat is arranged on the back side of the upper part of the movable plate, the elastic part is arranged on the back side of the lower part of the movable plate, the hinged seat is rotatably arranged on the rotating shaft in the mounting part, and the elastic part is provided in multiple numbers and abuts against the elastic seat in the mounting part; when the coal ore and gangue are squeezed, the movable plate can be pushed to rotate to expand the spacing of the drop port below the hopper, so that the coal ore and gangue are discharged from the drop port under stress.

[0010] Furthermore, the extrusion assembly includes a supporting portion arranged in the supporting platform of the inclined plate, and an impact block slidably arranged in the supporting portion; the limiting plates on both sides of the impact block are slidably arranged in the limiting portions of the supporting portion, a return spring is arranged between the limiting plates and the limiting portions, the guide groove on the impact block is slidably matched with the supporting portion, and a convex ridge is arranged on the end face of the impact block located inside the hopper; the outer portion of the impact block is driven by the hammer device to slide into the hopper and squeeze the coal ore and gangue inside the hopper through the convex ridge.

[0011] Furthermore, the inclined surface of the adjusting baffle has a certain angle with the vertical surface, and the end surface of the convex edge of the impact block is a vertical surface, so that when the impact block moves horizontally and squeezes the coal ore and gangue, the coal ore and gangue tend to move downward after being squeezed by the inclined surface, and the downward movement trend drives the coal ore and gangue at the discharge port of the hopper to push the movable plate of the discharge assembly to rotate.

[0012] Furthermore, the hammering device includes a mounting seat, a driving motor, a driving rod, a rocker arm, a transmission rod, a hammer head assembly and a connecting rod; the driving motor is fixedly arranged on the mounting seat, the output end of the driving motor is connected to one end of the driving rod, and the other end of the driving rod is hinged to the first end of the transmission rod; one end of the rocker arm is rotatably arranged on the mounting seat, and the other end of the rocker arm is hinged to the middle part of the transmission rod; the hammer head assembly is rotatably arranged on the mounting seat, the second end of the transmission rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to the hammer head assembly; the driving motor drives the driving rod to rotate at a uniform speed, and the driving rod drives the hammer head assembly to rotate through the rocker arm, the transmission rod and the connecting rod, and the hammer head assembly is accelerated when it rotates to a position near the impact block through the rocker arm and the connecting rod, thereby increasing the driving force exerted on the impact block.

[0013] Furthermore, the hammer head assembly includes a hammer head, a hammer head seat and an elastic telescopic part, the hammer head seat is rotatably connected to the mounting seat via a rotating shaft, the hinge position of the connecting rod and the hammer head seat is located on one side of the rotating shaft, the hammer head is hinged to the hammer head seat, and an elastic telescopic part is arranged between the hammer head and the hammer head seat; after the hammer head assembly contacts the impact block, the hammer head rotates relative to the hammer head seat so that the hammer head assembly can continue to rotate and pass through the blocking interval of the impact block, and after the hammer head assembly is separated from the impact block, the elastic telescopic part restores the hammer head and the hammer head seat to their initial state.

[0014] Furthermore, the angle between the inclined surface and the vertical surface is degrees, the guide assembly includes a guide rail fixedly connected to the side vertical plate, both sides of the movable plate are arranged on the guide rail through sliders, and the protective cover is arranged on the outside of the guide rail and the slider.

[0015] Furthermore, the inclined support plate of the tray assembly is connected to the base through a support frame, a guide strip is provided on the surface of the inclined support plate, a jet seat installed on the base is provided below the inclined support plate, and a nozzle corresponding to the guide strip is provided on the jet seat; the X-ray device includes a ray outlet provided on the shell, the ray outlet is at the same height as the lower end of the inclined support plate, and an anti-collision plate is provided below the ray outlet.

[0016] A method for screening coal mines using X-ray imaging to identify gangue is disclosed. The baffle is moved and adjusted according to the size of the current batch of coal ore to adjust the size of the drop opening of the hopper. The extrusion assembly is driven by a hammer device and the inclined surface of the baffle is adjusted to make the coal ore and gangue in the hopper move vertically downward. The coal ore and gangue are extruded through the movable plate of the discharging assembly and discharged from the drop opening of the hopper in a squeezed state. They fall onto the tray assembly in a single layer. The coal ore and gangue on the tray assembly are identified by an X-ray device, and the nozzles on the jet seat at the corresponding position are controlled to generate impact airflow to separate the gangue from the coal ore.

[0017] Compared with the prior art, the present invention provides a coal mine screening device and a ore dressing method for identifying gangue using X-ray imaging, which has the following beneficial effects:

[0018] 1. The hopper of the present invention is composed of a side plate assembly and an adjustable baffle. The baffle can be adjusted to change the size of the drop opening to adapt to the size of different batches of coal ore. The extrusion assembly cooperates with the inclined surface of the adjustable baffle to make the coal ore and gangue in the hopper have a downward movement trend, and at the same time, the hopper is vibrated to facilitate the drop of materials.

[0019] 2. The discharging assembly at the bottom of the hopper of the present invention can discharge the coal ore and gangue in a single layer under a squeezed state, so that the coal ore and gangue fall onto the tray assembly in a single layer, which is convenient for identifying the coal ore and gangue on the tray assembly using an X-ray device. After identification and positioning, the gangue is separated from the coal ore through the nozzle on the jet seat.

[0020] 3. The hammering device of the present invention has a connecting rod transmission mechanism, so that the driving motor outputs a uniform rotational motion, and the hammer head assembly is accelerated when it approaches the impact block through the rocker arm, transmission rod and connecting rod, thereby increasing the driving force on the extrusion assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the overall structure of the coal mine screening equipment for identifying gangue using X-ray imaging according to the present invention;

[0022] Figure 2 It is a structural schematic diagram of the side plate assembly and the adjustment baffle of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the adjustment baffle and the extrusion assembly of the present invention;

[0024] Figure 4 A cross-sectional view of an extrusion assembly of the present invention;

[0025] Figure 5 It is an exploded schematic diagram of the discharging assembly of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the tray assembly of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the X-ray device of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the hammering device of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the connecting rod assembly of the hammer device of the present invention;

[0030] Fig.10 It is a schematic diagram of multiple states of the hammer device of the present invention;

[0031] In the figure:

[0032] Side plate assembly 1, side vertical plate 11, inclined plate 12, material pushing port 121, reinforcing rib plate 122, support platform 123;

[0033] Adjusting baffle 2, movable plate 21, guide assembly 22, guide rail 221, slider 222, protective cover 223, cylinder seat 23, driving cylinder 24, reinforcing rib 25, inclined surface 26, mounting portion 27, elastic seat 271, rotating shaft 28, anti-slip strip 29;

[0034] Extrusion assembly 3, support portion 31, limiting portion 311, return spring 312, impact block 32, guide groove 321, limiting plate 322, convex ridge 323;

[0035] X-ray device 4, housing 41, ray outlet 42, anti-collision plate 43;

[0036] Tray assembly 5, base 51, support frame 52, inclined support plate 53, guide strip 54, jet seat 55, nozzle 56;

[0037] Hammering device 6, mounting seat 61, driving motor 62, driving rod 63, swing rod 64, transmission rod 65, hammer head assembly 66, hammer head 661, hammer head seat 662, elastic telescopic member 663, connecting rod 67;

[0038] Discharging assembly 7, movable plate 71, hinge seat 72, elastic part 73; DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The present invention is described in detail below with reference to the accompanying drawings. The coal mine screening equipment and ore dressing method for identifying gangue using X-ray imaging of the present invention include a hopper surrounded by a side plate assembly 1 and an adjusting baffle 2, and a tray assembly 5 and an X-ray device 4 located below the hopper. The adjusting baffle 2 can move laterally relative to the side plate assembly 1 to adjust the size of the drop opening below to adapt to the screening of gangue and coal ore of different sizes; the side plate assembly 1 is provided with an extrusion assembly 3 on one side relative to the adjusting baffle 2, and a hammer device 6 is provided on the outer side of the extrusion assembly 3, and the extrusion assembly 3 is driven to move back and forth by the hammer device 6. to squeeze the coal ore and gangue in the hopper; a discharge assembly 7 is also provided at the lower part of the adjusting baffle 2 at the drop-out port, and the discharge assembly 7 can rotate relative to the adjusting baffle 2 to change the spacing of the drop-out port, so that the coal ore and gangue are discharged under force; a tray assembly 5 is provided below the drop-out port of the hopper, and the extrusion assembly 3 cooperates with the discharge assembly 7 to make the coal ore and gangue inside the hopper fall onto the tray assembly 5 in a single layer, and the coal ore and gangue on the tray assembly 5 are identified and selected by an X-ray device 4 arranged at the same height as the tray assembly 5.

[0041] In an embodiment of the present invention, the hopper consists of a side plate assembly 1 and an adjustable baffle 2. The baffle 2 can be adjusted to change the size of the drop opening to adapt to the size of different batches of coal ore. The extrusion assembly 3 cooperates with the inclined surface 26 of the adjustable baffle 2 to make the coal ore and gangue in the hopper have a downward movement trend, and at the same time, the hopper is vibrated to facilitate the drop of materials.

[0042] According to the attached Figure 2The side plate assembly 1 includes an inclined plate 12 arranged opposite to the adjusting baffle 2, and side vertical plates 11 arranged on both sides of the inclined plate 12. The inclined plate 12 is provided with a support platform 123 for installing the extrusion assembly 3. The extrusion assembly 3 extends into the hopper through a pushing port 121 arranged on the inclined surface of the inclined plate 12. A reinforcing rib plate 122 is also provided on the inclined plate 12 on the back side of the blanking port.

[0043] The adjusting baffle 2 includes a movable plate 21, a guide assembly 22, a cylinder seat 23, a driving cylinder 24, a reinforcing rib 25, an inclined surface 26, a mounting portion 27, a rotating shaft 28 and an anti-slip strip 29; the two sides of the movable plate 21 are respectively connected to the side vertical plates 11 on both sides of the side plate assembly 1 through the guide assembly 22, a cylinder seat 23 is provided in the middle part of the outer side of the movable plate 21, and the cylinder seat 23 is connected to the movable end of the driving cylinder 24, and the movable plate 21 is driven by the driving cylinder 24 to move to change the size of the drop opening below the hopper; a plurality of reinforcing ribs 25 are provided on the outer side of the movable plate 21, the upper part of the end surface of the movable plate 21 facing the inclined plate 12 is an inclined surface 26, and the inclined surface 26 is provided with a transversely extending anti-slip strip 29; the mounting portion 27 is located below the inclined surface 26 on the movable plate 21, and a rotating shaft 28 is provided in the mounting portion 27, and the discharging assembly 7 is rotatably arranged on the rotating shaft 28.

[0044] According to the attached Figure 3-5 The discharging assembly 7 includes a movable plate 71, a hinge seat 72 and an elastic part 73. The hinge seat 72 is arranged on the back of the upper part of the movable plate 71, and the elastic part 73 is arranged on the back of the lower part of the movable plate 71. The hinge seat 72 is rotatably arranged on the rotating shaft 28 in the mounting part 27. There are multiple elastic parts 73 and they abut against the elastic seat 271 in the mounting part 27. When the coal ore and gangue are squeezed, the movable plate 71 can be pushed to rotate to expand the spacing of the drop port below the hopper, so that the coal ore and gangue are discharged from the drop port under stress.

[0045] In an embodiment of the present invention, the discharge assembly 7 at the bottom of the hopper can discharge the coal ore and gangue in a single layer under a squeezed state, so that the coal ore and gangue fall onto the tray assembly 5 in a single layer, making it easy to identify the coal ore and gangue on the tray assembly 5 using the X-ray device 4, and after identification and positioning, the gangue is separated from the coal ore through the nozzle 56 on the jet seat 55.

[0046] The extrusion assembly 3 includes a support portion 31 arranged in the support platform 123 of the inclined plate 12, and an impact block 32 slidably arranged in the support portion 31; the limiting plates 322 on both sides of the impact block 32 are slidably arranged in the limiting portions 311 of the support portion 31, and a return spring 312 is arranged between the limiting plates 322 and the limiting portions 311, and the guide groove 321 on the impact block 32 is slidably matched with the support portion 31, and a convex ridge 323 is arranged on the end surface of the impact block 32 located inside the hopper; the outer portion of the impact block 32 is driven by the hammer device 6 to slide into the hopper and squeeze the coal ore and gangue inside the hopper through the convex ridge 323.

[0047] The inclined surface 26 of the adjusting baffle 2 has a certain angle with the vertical surface, and the end surface of the ridge 323 of the impact block 32 is a vertical surface, so that when the impact block 32 moves horizontally and squeezes the coal ore and gangue, the coal ore and gangue tend to move downward after being squeezed by the inclined surface 26. The downward movement trend drives the coal ore and gangue at the discharge port of the hopper to push the movable plate 71 of the discharge assembly 7 to rotate.

[0048] According to the attached Figure 8-10 The hammer device 6 includes a mounting seat 61, a driving motor 62, a driving rod 63, a swing rod 64, a transmission rod 65, a hammer assembly 66 and a connecting rod 67; the driving motor 62 is fixedly arranged on the mounting seat 61, the output end of the driving motor 62 is connected to one end of the driving rod 63, and the other end of the driving rod 63 is hinged to the first end of the transmission rod 65; one end of the swing rod 64 is rotatably arranged on the mounting seat 61, and the other end of the swing rod 64 is hinged to the middle part of the transmission rod 65; the hammer assembly 66 6 is rotatably arranged on the mounting seat 61, the second end of the transmission rod 65 is hinged to one end of the connecting rod 67, and the other end of the connecting rod 67 is hinged to the hammer assembly 66; the driving motor 62 drives the driving rod 63 to rotate at a constant speed, and the driving rod 63 drives the hammer assembly 66 to rotate through the swing rod 64, the transmission rod 65 and the connecting rod 67, and the hammer assembly 66 is accelerated when it rotates to a position near the impact block 32 through the swing rod 64 and the connecting rod 67, thereby increasing the driving force on the impact block 32.

[0049] Specifically, the hammer assembly 66 is Fig.10 -A is accelerated, and the driving rod 63 rotates at a constant speed. When the driving rod 63 and the transmission rod 65 are in a state of being approximately vertical, that is, Fig.10In the middle A state, the driving rod 63 and the transmission rod 65 are in an approximately vertical state, and the driving rod 63 causes the transmission rod 65 to have the greatest lateral movement tendency; and when the hammer assembly 66 is driven by the connecting rod 67 to rotate, when the connecting rod 67 and the hammer assembly 66 are approximately vertical, that is, Fig.10 In the middle A state, the connecting rod 67 is approximately perpendicular to the hammer assembly 66, and the transmission rod 65 transmits the maximum lateral movement tendency to the hammer assembly 66 through the connecting rod 67. Therefore, during the uniform rotation of the driving rod 63, the hammer assembly 66 Fig.10 When the hammer assembly 66 is in the middle A state, the speed is increased, thereby increasing the force exerted by the hammer assembly 66 on the impact block 32 .

[0050] The hammer assembly 66 includes a hammer head 661, a hammer seat 662 and an elastic telescopic member 663. The hammer seat 662 is rotatably connected to the mounting seat 61 via a rotating shaft. The hinge position of the connecting rod 67 and the hammer seat 662 is located on one side of the rotating shaft. The hammer head 661 is hinged to the hammer seat 662. An elastic telescopic member 663 is arranged between the hammer head 661 and the hammer seat 662. After the hammer assembly 66 contacts the impact block 32, the hammer head 661 rotates relative to the hammer seat 662 so that the hammer assembly 66 can continue to rotate and pass through the blocking interval of the impact block 32. After the hammer assembly 66 is separated from the impact block 32, the elastic telescopic member 663 restores the hammer head 661 and the hammer seat 662 to their initial states.

[0051] In an embodiment of the present invention, the hammer device 6 has a connecting rod transmission mechanism, so that the driving motor outputs a uniform rotational motion, and drives the hammer head assembly 66 through the rocker arm 64, the transmission rod 65 and the connecting rod 67 to be accelerated when approaching the position of the impact block 32, thereby increasing the driving force on the extrusion assembly 3.

[0052] The angle between the inclined surface 26 and the vertical surface is 5 degrees. The guide assembly 22 includes a guide rail 221 fixedly connected to the side plate 11. Both sides of the movable plate 21 are arranged on the guide rail 221 through sliders 222. The protective cover 223 is arranged on the outside of the guide rail 221 and the slider 222.

[0053] According to the attached Figure 6-7 The inclined support plate 53 of the tray assembly 5 is connected to the base 51 through a support frame 52, a guide strip 54 is provided on the surface of the inclined support plate 53, a jet seat 55 installed on the base 51 is provided below the inclined support plate 53, and a nozzle 56 corresponding to the guide strip 54 is provided on the jet seat 55; the X-ray device 4 includes a ray outlet 42 arranged on the shell 41, the ray outlet 42 is at the same height as the lower end of the inclined support plate 53, and an anti-collision plate 43 is provided below the ray outlet 42.

[0054] The coal mine screening method for identifying gangue by using X-ray imaging of the present invention comprises the following steps:

[0055] First, the baffle 2 is moved and adjusted according to the size of the current batch of coal ore to adjust the size of the feeding opening of the hopper; then the coal ore conveyor line is started, and the extrusion assembly 3 is driven by the hammer device 6 and the inclined surface 26 of the baffle 2 is adjusted to make the coal ore and gangue in the hopper have a vertical downward movement trend, and the coal ore and gangue are extruded by the movable plate 71 of the discharging assembly 7 and discharged from the feeding opening of the hopper in a squeezed state, and then fall onto the tray assembly 5 in a single layer; the coal ore and gangue on the tray assembly 5 are identified by the X-ray device 4, and the nozzle 56 on the jet seat 55 at the corresponding position is controlled to generate an impact airflow to separate the gangue from the coal ore.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mine screening device for identifying gangue using X-ray imaging, comprising a hopper surrounded by a side plate assembly (1) and an adjustable baffle (2), and a tray assembly (5) and an X-ray device (4) located below the hopper, characterized in that: The adjusting baffle (2) can move laterally relative to the side plate assembly (1) to adjust the size of the material drop opening below to adapt to the screening of gangue and coal ore of different sizes; The side plate assembly (1) is provided with an extrusion assembly (3) on one side opposite to the adjustment baffle (2), and a hammer device (6) is provided on the outside of the extrusion assembly (3), and the extrusion assembly (3) is driven to move back and forth by the hammer device (6) to extrude the coal ore and gangue in the hopper; A discharge assembly (7) is also provided at the lower part of the adjusting baffle (2) at the material discharge opening, and the discharge assembly (7) can rotate relative to the adjusting baffle (2) to change the spacing of the material discharge opening, so that the coal ore and gangue are discharged under stress; A tray assembly (5) is provided below the material discharge port of the hopper, and the coal ore and gangue in the hopper are allowed to fall onto the tray assembly (5) in a single layer by means of an extrusion assembly (3) in cooperation with a discharge assembly (7). The coal ore and gangue on the tray assembly (5) are identified and selected by means of an X-ray device (4) provided at the same height as the tray assembly (5).

2. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 1, characterized in that: The side plate assembly (1) comprises an inclined plate (12) arranged opposite to the adjusting baffle (2), and side upright plates (11) arranged on both sides of the inclined plate (12); a support platform (123) for mounting the extrusion assembly (3) is arranged on the inclined plate (12); the extrusion assembly (3) extends into the hopper through a pushing opening (121) arranged on the inclined surface of the inclined plate (12); and a reinforcing rib plate (122) is also arranged on the inclined plate (12) at the back side of the dropping opening.

3. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 2, characterized in that: The adjusting baffle (2) comprises a movable plate (21), a guide assembly (22), a cylinder seat (23), a driving cylinder (24), a reinforcing rib (25), an inclined surface (26), a mounting portion (27), a rotating shaft (28) and an anti-slip strip (29); The two sides of the movable plate (21) are connected to the side upright plates (11) on both sides of the side plate assembly (1) via guide assemblies (22), a cylinder seat (23) is provided in the middle of the outer side of the movable plate (21), the cylinder seat (23) is connected to the movable end of the driving cylinder (24), and the movable plate (21) is driven to move by the driving cylinder (24) to change the size of the drop opening below the hopper; A plurality of reinforcing ribs (25) are arranged on the outer side of the movable plate (21); the upper portion of the end surface of the movable plate (21) facing the inclined plate (12) is an inclined surface (26); and a transversely extending anti-slip strip (29) is arranged on the inclined surface (26); The mounting portion (27) is located below the inclined surface (26) on the movable plate (21), a rotating shaft (28) is provided in the mounting portion (27), and the discharging assembly (7) is rotatably disposed on the rotating shaft (28).

4. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 3, characterized in that: The discharging assembly (7) comprises a movable plate (71), a hinge seat (72) and an elastic part (73), wherein the hinge seat (72) is arranged on the back side of the upper part of the movable plate (71), and the elastic part (73) is arranged on the back side of the lower part of the movable plate (71), and the hinge seat (72) is rotatably arranged on the rotating shaft (28) in the mounting part (27), and the elastic part (73) is provided in plurality and abuts against the elastic seat (271) in the mounting part (27); When the coal ore and gangue are squeezed, the movable plate (71) can be pushed to rotate to expand the spacing of the material discharge opening below the hopper, so that the coal ore and gangue are discharged from the material discharge opening under a stressed state.

5. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 4, characterized in that: The extrusion assembly (3) comprises a support portion (31) arranged in a support platform (123) of the inclined plate (12), and an impact block (32) slidably arranged in the support portion (31); The limiting plates (322) on both sides of the impact block (32) are slidably arranged in the limiting portion (311) of the support portion (31); a return spring (312) is arranged between the limiting plates (322) and the limiting portion (311); the guide groove (321) on the impact block (32) is slidably matched with the support portion (31); and a convex ridge (323) is arranged on the end surface of the impact block (32) located inside the hopper; The outside of the impact block (32) is driven by the hammer device (6) to slide into the inside of the hopper and squeeze the coal ore and gangue inside the hopper through the convex ridges (323).

6. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 5, characterized in that: The inclined surface (26) of the regulating baffle (2) has a certain angle with the vertical surface, and the end surface of the convex edge (323) of the impact block (32) is a vertical surface, so that when the impact block (32) moves horizontally and squeezes the coal ore and gangue, the coal ore and gangue are squeezed by the inclined surface (26) and have a tendency to move downward. The downward movement tendency drives the coal ore and gangue at the discharge port of the hopper to push the movable plate (71) of the discharge assembly (7) to rotate.

7. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 6, characterized in that: The hammer device (6) comprises a mounting seat (61), a driving motor (62), a driving rod (63), a swing rod (64), a transmission rod (65), a hammer head assembly (66) and a connecting rod (67); The drive motor (62) is fixedly mounted on the mounting seat (61), the output end of the drive motor (62) is connected to one end of the drive rod (63), and the other end of the drive rod (63) is hinged to the first end of the transmission rod (65); One end of the swing rod (64) is rotatably disposed on the mounting seat (61), and the other end of the swing rod (64) is hinged to the middle portion of the transmission rod (65); The hammer assembly (66) is rotatably arranged on the mounting seat (61), the second end of the transmission rod (65) is hinged to one end of the connecting rod (67), and the other end of the connecting rod (67) is hinged to the hammer assembly (66); The driving motor (62) drives the driving rod (63) to rotate at a constant speed, and the driving rod (63) drives the hammer assembly (66) to rotate via a swing rod (64), a transmission rod (65) and a connecting rod (67). The swing rod (64) and the connecting rod (67) accelerate the hammer assembly (66) when it rotates to a position near where it strikes the impact block (32), thereby increasing the driving force applied to the impact block (32).

8. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 7, characterized in that: The hammer assembly (66) comprises a hammer head portion (661), a hammer head seat (662) and an elastic telescopic member (663); the hammer head seat (662) is rotatably connected to the mounting seat (61) via a rotating shaft; a hinged position between the connecting rod (67) and the hammer head seat (662) is located on one side of the rotating shaft; the hammer head portion (661) is hinged to the hammer head seat (662); and an elastic telescopic member (663) is provided between the hammer head portion (661) and the hammer head seat (662); After the hammer assembly (66) contacts the impact block (32), the hammer head portion (661) rotates relative to the hammer head seat (662) so that the hammer head assembly (66) can continue to rotate and pass through the blocking interval of the impact block (32); after the hammer head assembly (66) is separated from the impact block (32), the elastic telescopic member (663) restores the hammer head portion (661) and the hammer head seat (662) to their initial state.

9. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 8, characterized in that: The angle between the inclined surface (26) and the vertical surface is 5 degrees. The guide assembly (22) comprises a guide rail (221) fixedly connected to the side stand (11). Both sides of the movable plate (21) are arranged on the guide rail (221) via sliders (222). The protective cover (223) is arranged on the outside of the guide rail (221) and the slider (222).

10. The coal mine screening equipment for identifying gangue using X-ray imaging according to claim 9, characterized in that: The inclined support plate (53) of the tray assembly (5) is connected to the base (51) via a support frame (52); a guide strip (54) is provided on the surface of the inclined support plate (53); an air jet seat (55) mounted on the base (51) is provided below the inclined support plate (53); and a nozzle (56) corresponding to the guide strip (54) is provided on the air jet seat (55); The X-ray device (4) comprises a ray outlet (42) arranged on a housing (41), the ray outlet (42) being at the same height as the lower end of the inclined support plate (53), and an anti-collision plate (43) being arranged below the ray outlet (42).

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