Coal preparation equipment

Abstract

The present invention provides a coal preparation device, which includes: a separation component including a separation plate inclined below the coal preparation inlet and a partition plate arranged vertically. The upper end of the partition plate is connected to the separation plate, and the space between the partition plate and the inner wall of the coal preparation chamber forms a first separation chamber. The lower surface of the partition plate and the separation plate enclose a second separation chamber. The separation plate has a separation opening penetrating through and communicating with the second separation chamber, and a filter screen is arranged at the separation opening. The conveying component includes a first conveying member below the outlet of the first separation chamber and a second conveying member below the outlet of the second separation chamber. Jetting members are arranged at the discharging ends of the first conveying member and the second conveying member. The collecting chamber has a coal collecting sub-chamber and a gangue collecting sub-chamber arranged at intervals in the conveying direction of the conveying component. Through the technical solution provided by the present application, the problem that the coal preparation device in the related art has a poor separation effect on coal blocks and gangue can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal screening, and more particularly, to a coal separation device. Background Art

[0002] Currently, during coal mining and processing, the separation of coal blocks and gangue is completed by manual separation. Manual separation has problems such as high labor intensity, low efficiency, unstable separation quality varying from person to person, and the dust in the working environment affecting and damaging the health of workers.

[0003] In related technologies, the coal separation device includes a gangue identification component and a jet component. By identifying the distribution of gangue through the gangue identification component, the operation of the jet component is controlled according to the distribution of gangue, so that the coal blocks naturally fall into the first channel, and the jet component blows the gangue into the second channel to complete the separation of gangue and coal.

[0004] However, since the volumes of coal blocks and gangue are different, when a large-volume gangue and a small-volume coal block are simultaneously within the jet range of the jet component, if the jet component uses a large jet force, both the gangue and the coal block will be blown into the second channel. If the jet component uses a small jet force, it cannot blow the large-volume gangue, resulting in the gangue and the coal block falling into the first channel together, so that the coal separation device in related technologies has a poor separation effect on coal blocks and gangue. Summary of the Invention

[0005] The present invention provides a coal separation device to solve the problem of poor separation effect of the coal separation device on coal blocks and gangue in related technologies.

[0006] The present invention provides a coal preparation device, which includes: a coal preparation box having a coal preparation chamber, a conveying chamber, and a collection chamber that are sequentially connected. A coal preparation inlet is provided at the upper end of the coal preparation chamber, and a coal preparation outlet communicating with the conveying chamber is provided at the lower end of the coal preparation chamber; a conveying assembly is arranged in the conveying chamber and extends in the horizontal direction. The feeding end of the conveying assembly is located below the coal preparation outlet, and the discharging end of the conveying assembly is located at the inlet of the collection chamber; a screening assembly includes a gangue identification member and a jetting member. The jetting member is arranged at the discharging end of the conveying assembly. The collection chamber has a coal collection sub-chamber and a gangue collection sub-chamber that are spaced apart in the conveying direction of the conveying assembly; a separation assembly is arranged in the coal preparation chamber. The separation assembly includes a separation plate that is inclined and arranged below the coal preparation inlet and a partition plate that is arranged vertically. The upper end of the partition plate is connected to the separation plate. The interval between the outer side wall of the partition plate and the inner wall of the coal preparation chamber forms a first separation chamber. The inner side wall of the partition plate and the lower surface of the separation plate jointly enclose a second separation chamber. The lower end of the separation plate extends to the inlet of the first separation chamber. The separation plate has a through hole that communicates with the second separation chamber, and a filter screen is arranged at the through hole. The outlet of the first separation chamber and the outlet of the second separation chamber jointly form the coal preparation outlet. The conveying assembly includes a first conveying member located below the outlet of the first separation chamber and a second conveying member located below the outlet of the second separation chamber. Jetting members are arranged at the discharging ends of the first conveying member and the second conveying member.

[0007] Further, the separation assembly further includes a first buffer plate that is inclined and arranged between the separation plate and the coal preparation inlet. The coal to be screened entering from the coal preparation inlet can move from the first buffer plate to the separation plate.

[0008] Further, the coal preparation device further includes a second buffer plate that is inclined and arranged. One end of the second buffer plate is connected to the inner side wall of the coal preparation chamber, and the other end of the second buffer plate extends between the first buffer plate and the separation plate. The coal to be screened entering from the coal preparation inlet can move to the separation plate through the first buffer plate and the second buffer plate in sequence.

[0009] Further, the separation assembly further includes a first connecting pipe, a second connecting pipe, and a dust removal pipe. The separation assembly further has a negative pressure dust removal chamber. The two ends of the first connecting pipe are respectively connected to the first separation chamber and the second separation chamber. The inlet of the second connecting pipe is connected to the first connecting pipe. The outlet of the second connecting pipe is connected to the negative pressure dust removal chamber. The inlet of the dust removal pipe is connected to the negative pressure dust removal chamber, and the outlet of the dust removal pipe is connected to the outside.

[0010] Further, the separation assembly further includes a driving member, an installation cylinder, and a negative pressure fan blade. The inner cavity of the installation cylinder forms a negative pressure dust removal chamber. The negative pressure fan blade is arranged in the negative pressure dust removal chamber, and the driving member is drivingly connected to the negative pressure fan blade to drive the negative pressure fan blade to rotate.

[0011] Further, the driving member includes a driving fan blade rotatably disposed in the first separation cavity. The driving fan blade is located below the inlet of the first separation cavity and is drivingly connected to the negative pressure fan blade.

[0012] Further, a third buffer plate is inclinedly disposed on the inner side wall of the first separation cavity. The third buffer plate is located between the inlet of the first separation cavity and the driving fan blade, and the projection of the third buffer plate on the horizontal plane covers at least half of the projection of the driving fan blade on the horizontal plane.

[0013] Further, the coal separation box includes a device main body and a vibration box. The coal separation cavity is disposed in the vibration box, and the conveying cavity and the collecting cavity are both disposed in the device main body. The vibration box is disposed on the device main body in a vertically vibratable manner, and the separation assembly is disposed in the vibration box.

[0014] Further, the vibration box includes a box body, a vibration motor, and shock-absorbing springs. The vibration motor is disposed in the box body. The upper end of the shock-absorbing spring abuts against the box body, and the lower end of the shock-absorbing spring abuts against the device main body.

[0015] Further, the coal separation device has two first separation cavities and one second separation cavity, and the two first separation cavities are respectively located on both sides of the second separation cavity.

[0016] Applying the technical solution of the present invention, the coal separation device includes a coal separation box, a conveying assembly, a screening assembly, and a separation assembly. The coal and gangue to be screened are added into the coal separation device from the coal separation inlet. The coal and gangue to be screened fall on the separation plate. Since the separation plate has a separation opening penetrating through and communicating with the second separation cavity, and a filter screen is disposed at the separation opening, the coal and gangue to be screened are filtered by the filter screen into small-particle coal and gangue to be screened and large-particle coal and gangue to be screened. The small-particle coal and gangue to be screened enter the second separation cavity, and the large-particle coal and gangue to be screened enter the first separation cavity. Since the feeding end of the first conveying member is located below the outlet of the first separation cavity, and the feeding end of the second conveying member is located below the outlet of the second separation cavity, the small-particle coal and gangue to be screened are conveyed to the collecting cavity through the second conveying member, and the large-particle coal and gangue to be screened are conveyed to the collecting cavity through the first conveying member, reducing the volume difference of the coal and gangue to be screened within the jet range of the jetting member. The jetting force of the jetting member at the discharging end of the first conveying member is adjusted according to the particle size of the coal and gangue to be screened on the first conveying member, and the jetting force of the jetting member at the discharging end of the second conveying member is adjusted according to the particle size of the coal and gangue to be screened on the second conveying member. The gangue identification member is used to identify the gangue and its distribution in the coal and gangue to be screened, and the jetting members disposed at the discharging ends of the first conveying member and the second conveying member are controlled to work according to the distribution of the gangue, reducing the volume difference of the coal and gangue to be screened within the jet range of the jetting member. Thus, on the premise that the jetting member can blow the gangue into the gangue collecting sub-cavity, the coal blocks are not blown by the jetting member, and the coal blocks fall into the coal collecting sub-cavity, completing the separation of the gangue and the coal, and improving the separation effect of the coal separation device on the coal blocks and the gangue. Brief Description of the Drawings

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A cross-sectional view of a coal preparation device provided according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural view of a separation component of a coal preparation device provided according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural view of a conveying component, a separation component, and a screening component of a coal preparation device provided according to an embodiment of the present invention is shown;

[0021] Figure 4 Shown is Figure 3 A partial enlarged view at A in

[0022] Figure 5 A side view of a coal preparation device provided according to an embodiment of the present invention is shown;

[0023] Figure 6 A cross-sectional view of a coal preparation device provided according to an embodiment of the present invention from another perspective is shown;

[0024] Figure 7 A schematic structural view of a coal preparation device provided according to an embodiment of the present invention is shown.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10, coal preparation box; 11, coal preparation cavity; 111, coal preparation inlet; 112, coal preparation outlet; 12, conveying cavity; 13, collection cavity; 131, coal collection sub-cavity; 132, gangue collection sub-cavity; 14, equipment main body; 15, vibration box; 151, box body; 152, vibration motor; 153, shock-absorbing spring;

[0027] 20, conveying component; 21, first conveying member; 22, second conveying member;

[0028] 30, screening component; 31, gangue identification member; 32, jetting member;

[0029] 40. Separation component; 41. Separation plate; 411. Separation opening; 4111. Filter screen; 42. Partition plate; 43. First buffer plate; 44. Second buffer plate; 451. First connecting pipe; 452. Second connecting pipe; 453. Dust removal pipe; 454. Negative pressure dust removal cavity; 455. Driving member; 4551. Driving fan blade; 4552. Transmission belt; 456. Installation cylinder; 457. Negative pressure fan blade; 46. Third buffer plate;

[0030] 51. First separation cavity; 52. Second separation cavity. Detailed implementation manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] Such as Figures 1 to 7As shown in the figure, an embodiment of the present invention provides a coal preparation device, which includes a coal preparation box 10, a conveying component 20, a screening component 30, and a separation component 40. The coal preparation box 10 has a coal preparation chamber 11, a conveying chamber 12, and a collection chamber 13 that are sequentially connected. An upper end of the coal preparation chamber 11 is provided with a coal preparation inlet 111, and a lower end of the coal preparation chamber 11 is provided with a coal preparation outlet 112 that communicates with the conveying chamber 12. The conveying component 20 is disposed in the conveying chamber 12 and extends in a horizontal direction. A feed end of the conveying component 20 is located below the coal preparation outlet 112, and a discharge end of the conveying component 20 is located at an inlet of the collection chamber 13. The screening component 30 includes a gangue identification member 31 and a jetting member 32. The jetting member 32 is disposed at the discharge end of the conveying component 20. The collection chamber 13 has a coal collection sub-chamber 131 and a gangue collection sub-chamber 132 that are spaced apart in the conveying direction of the conveying component 20. The separation component 40 is disposed in the coal preparation chamber 11. The separation component 40 includes a separation plate 41 that is inclined below the coal preparation inlet 111 and a partition plate 42 that is disposed vertically. An upper end of the partition plate 42 is connected to the separation plate 41. A space between an outer sidewall of the partition plate 42 and an inner wall of the coal preparation chamber 11 forms a first separation chamber 51. An inner sidewall of the partition plate 42 and a lower surface of the separation plate 41 together enclose a second separation chamber 52. A lower end of the separation plate 41 extends to an inlet of the first separation chamber 51. The separation plate 41 has a separation opening 411 that penetrates and communicates with the second separation chamber 52. A filter screen 4111 is disposed at the separation opening 411. An outlet of the first separation chamber 51 and an outlet of the second separation chamber 52 together form the coal preparation outlet 112. The conveying component 20 includes a first conveying member 21 located below the outlet of the first separation chamber 51 and a second conveying member 22 located below the outlet of the second separation chamber 52. Jetting members 32 are disposed at discharge ends of the first conveying member 21 and the second conveying member 22.

[0033] Apply the coal preparation equipment provided by this embodiment. The coal preparation equipment includes a coal preparation box 10, a conveying component 20, a screening component 30, and a separation component 40. Add the coal to be screened, which includes coal blocks and gangue, into the coal preparation equipment from the coal preparation inlet 111. The coal to be screened falls on the separation plate 41. Since the separation plate 41 has a separation opening 411 that penetrates and communicates with the second separation cavity 52, and a filter screen 4111 is provided at the separation opening 411, the coal to be screened is filtered into small-particle coal to be screened and large-particle coal to be screened through the filter screen 4111. As a result, the small-particle coal to be screened enters the second separation cavity 52, and the large-particle coal to be screened enters the first separation cavity 51. Since the feeding end of the first conveyor 21 is located below the outlet of the first separation cavity 51, and the feeding end of the second conveyor 22 is located below the outlet of the second separation cavity 52, the small-particle coal to be screened is conveyed to the collection cavity 13 through the second conveyor 22, and the large-particle coal to be screened is conveyed to the collection cavity 13 through the first conveyor 21. This reduces the volume difference of the coal to be screened within the jet range of the jetting member 32, and adjusts the jetting force of the jetting member 32 at the discharging end of the first conveyor 21 according to the particle size of the coal to be screened on the first conveyor 21, and adjusts the jetting force of the jetting member 32 at the discharging end of the second conveyor 22 according to the particle size of the coal to be screened on the second conveyor 22. Use the gangue identification member 31 to identify the gangue and its distribution in the coal to be screened, and control the operation of the jetting member 32 provided at the discharging end of the first conveyor 21 and the jetting member 32 provided at the discharging end of the second conveyor 22 according to the distribution of the gangue. Thus, on the premise that the jetting member 32 can blow the gangue into the gangue collection sub-cavity 132, the coal blocks are not blown by the jetting member 32, and the coal blocks fall into the coal collection sub-cavity 131, completing the separation of the gangue and the coal, and improving the separation effect of the coal preparation equipment on the coal blocks and the gangue.

[0034] It should be noted that gangue identification members 31 are provided above both the first conveyor 21 and the second conveyor 22. The gangue identification member 31 includes an X-ray emitting device and a central controller. The X-ray emitting device emits an X-ray matrix. When the X-ray matrix encounters coal blocks and gangue, it attenuates. The X-ray receiving device receives the attenuated rays, and the central controller performs data processing to determine the distribution of the gangue in the coal to be screened.

[0035] Specifically, the jetting member 32 includes a cavity compressor, a jet nozzle, a solenoid valve, a sensor, and a gas supply channel, so as to accurately control the jetting force of different jetting members 32.

[0036] In this embodiment, the coal preparation inlet 111 is in an inverted trapezoidal shape, so that the coal preparation inlet 111 is convenient for feeding, and the separation efficiency of the coal preparation equipment for coal blocks and gangue is improved. Using the coal collection sub-cavity 131 and the gangue collection sub-cavity 132 can store the separated coal blocks and gangue separately for subsequent use of the coal blocks and the gangue.

[0037] As shown Figure 1 in FIG. Figure 1 , the separation component 40 further includes a first buffer plate 43 disposed obliquely, and the first buffer plate 43 is located between the separation plate 41 and the coal separation inlet 111. The coal to be screened entering from the coal separation inlet 111 can move from the first buffer plate 43 to the separation plate 41. By using the above-mentioned first buffer plate 43, the falling speed of the coal to be screened falling on the separation plate 41 can be reduced, so that the coal to be screened can be better filtered by the separation plate 41 into large-particle coal to be screened and small-particle coal to be screened.

[0038] It should be noted that there are the following two embodiments for the coal to be screened entering from the coal separation inlet 111 to move from the first buffer plate 43 to the separation plate 41:

[0039] In the first embodiment, the coal to be screened entering from the coal separation inlet 111 can directly move from the first buffer plate 43 to the separation plate 41, and the lower end of the first buffer plate 43 is located above the separation opening 411, so that the coal to be screened entering from the coal separation inlet 111 can directly move from the first buffer plate 43 to the separation plate 41;

[0040] In the second embodiment, the coal to be screened entering from the coal separation inlet 111 can indirectly move from the first buffer plate 43 to the separation plate 41. A transition plate (second buffer plate 44) is further provided between the first buffer plate 43 and the separation plate 41. The coal to be screened entering from the coal separation inlet 111 can move from the first buffer plate 43 to the transition plate and then from the transition plate to the separation plate 41, so that the coal to be screened entering from the coal separation inlet 111 can indirectly move from the first buffer plate 43 to the separation plate 41.

[0041] As shown Figure 1 in FIG. Figure 1 , the coal separation device further includes a second buffer plate 44 disposed obliquely. One end of the second buffer plate 44 is connected to the inner side wall of the coal separation chamber 11, and the other end of the second buffer plate 44 extends between the first buffer plate 43 and the separation plate 41. The coal to be screened entering from the coal separation inlet 111 can move to the separation plate 41 through the first buffer plate 43 and the second buffer plate 44 in sequence. By using the above-mentioned second buffer plate 44, the movement direction of the coal to be screened sliding down from the first buffer plate 43 can be changed, so that the coal to be screened is moved to the separation plate 41 by the second buffer plate 44, and the falling speed of the coal to be screened falling on the separation plate 41 can be reduced, so that the coal to be screened can be better filtered by the separation plate 41 into large-particle coal to be screened and small-particle coal to be screened.

[0042] As shown Figure 1As shown, the separation component 40 further includes a first connecting pipe 451, a second connecting pipe 452, and a dust removal pipe 453. The separation component 40 further has a negative pressure dust removal cavity 454. The two ends of the first connecting pipe 451 are respectively connected to the first separation cavity 51 and the second separation cavity 52. The inlet of the second connecting pipe 452 is connected to the first connecting pipe 451, and the outlet of the second connecting pipe 452 is connected to the negative pressure dust removal cavity 454. The inlet of the dust removal pipe 453 is connected to the negative pressure dust removal cavity 454, and the outlet of the dust removal pipe 453 is connected to the outside. When the coal to be screened falls, dust is generated. Under the negative pressure action of the negative pressure dust removal cavity 454, the dust in the first separation cavity 51 and the second separation cavity 52 successively enters the negative pressure dust removal cavity 454 through the first connecting pipe 451 and the second connecting pipe 452, and then the dust in the negative pressure dust removal cavity 454 is uniformly discharged to the dust removal mechanism outside through the dust removal pipe 453, avoiding dust pollution to the air, so environmental protection operations can be better carried out.

[0043] Moreover, the first buffer plate 43 and the second buffer plate 44 are used to reduce the falling speed of the coal to be screened, so that the coal to be screened falls evenly and slowly, and the dust in the coal to be screened also falls evenly and slowly, providing dust suction time for the first connecting pipe 451, the second connecting pipe 452, and the dust removal pipe 453, and further avoiding dust pollution to the air.

[0044] As Figure 1 shown, the separation component 40 further includes a driving member 455, an installation cylinder 456, and a negative pressure fan blade 457. The inner cavity of the installation cylinder 456 forms a negative pressure dust removal cavity 454. The negative pressure fan blade 457 is arranged in the negative pressure dust removal cavity 454, and the driving member 455 is drivingly connected to the negative pressure fan blade 457 to drive the negative pressure fan blade 457 to rotate. The driving member 455 is used to drive the negative pressure fan blade 457 to rotate in the inner cavity of the installation cylinder 456, thereby forming a pressure difference between the two ends of the installation cylinder 456 in its axial direction, so that the air pressure in the negative pressure dust removal cavity 454 is less than the air pressure in the first separation cavity 51, and the air pressure in the negative pressure dust removal cavity 454 is less than the air pressure in the second separation cavity 52, so that the dust in the first separation cavity 51 and the second separation cavity 52 enters the negative pressure dust removal cavity 454, and flows to the dust removal pipe 453 for unified discharge under the action of the pressure difference at both ends of the negative pressure dust removal cavity 454, avoiding dust pollution to the air, so environmental protection operations can be better carried out.

[0045] In this embodiment, filter plates are provided at both ends of the first connecting pipe 451 to prevent coal blocks and gangue in the first separation cavity 51 and the second separation cavity 52 from entering the first connecting pipe 451, playing a protective role for the negative pressure fan blade 457.

[0046] As Figure 1As shown in the figure, the driving member 455 includes a driving fan blade 4551 rotatably arranged in the first separation chamber 51. The driving fan blade 4551 is located below the inlet of the first separation chamber 51, and the driving fan blade 4551 is drivingly connected to the negative pressure fan blade 457. By using the impact force of the large-particle coal to be screened falling in the first separation chamber 51, the driving fan blade 4551 is rotated. The driving fan blade 4551 drives the negative pressure fan blade 457 to rotate, sucking dust from the first separation chamber 51 and the second separation chamber 52, improving the dust suction efficiency and greatly saving energy. Moreover, by using the driving fan blade 4551, the large-particle coal to be screened can be evenly distributed on the first conveyor 21, facilitating the identification by the gangue identification member 31.

[0047] As Figure 2 and Figure 5 shown in the figure, the driving member 455 further includes a transmission belt 4552. The transmission belt 4552 is sleeved on the rotating shafts of the driving fan blade 4551 and the negative pressure fan blade 457, so that the driving fan blade 4551 drives the negative pressure fan blade 457 to rotate through the transmission belt 4552. By using the transmission of the transmission belt 4552, it is convenient to stably transmit the rotational force of the driving fan blade 4551 generated by the falling of the large-particle coal to be screened, and improve the utilization rate of the impact force of the falling of the large-particle coal to be screened.

[0048] As Figure 1 shown in the figure, a third buffer plate 46 is inclinedly arranged on the inner side wall of the first separation chamber 51. The third buffer plate 46 is located between the inlet of the first separation chamber 51 and the driving fan blade 4551. The projection of the third buffer plate 46 on the horizontal plane covers at least half of the projection of the driving fan blade 4551 on the horizontal plane. By adopting the above-mentioned third buffer plate 46, under the guiding action of the third buffer plate 46, the large-particle coal to be screened can flow to one side of the driving fan blade 4551, so that the driving fan blade 4551 receives a rotational driving force in the upward direction, and the utilization rate of the impact force of the falling of the large-particle coal to be screened is improved.

[0049] As Figure 6 shown in the figure, the coal separation box 10 includes an equipment main body 14 and a vibration box 15. The coal separation chamber 11 is arranged in the vibration box 15, and the conveying chamber 12 and the collection chamber 13 are both arranged in the equipment main body 14. The vibration box 15 is arranged on the equipment main body 14 so as to be vibratable up and down. The separation assembly 40 is arranged in the vibration box 15. By using the up and down vibration of the vibration box 15, the filter net 4111 can filter the coal to be screened better.

[0050] As Figure 1As shown in the figure, the vibration box 15 includes a box body 151, a vibration motor 152, and a shock-absorbing spring 153. The vibration motor 152 is arranged in the box body 151. The upper end of the shock-absorbing spring 153 abuts against the box body 151, and the lower end of the shock-absorbing spring 153 abuts against the equipment main body 14. Since the upper end of the shock-absorbing spring 153 abuts against the box body 151 and the lower end of the shock-absorbing spring 153 abuts against the equipment main body 14, when the box body 151 vibrates up and down due to the vibration of the vibration motor 152, the elastic deformation of the shock-absorbing spring 153 is used to absorb the vibration, reduce the vibration of the equipment main body 14, make the conveying of the coal to be screened by the conveying component 20 in the equipment main body 14 stable, the identification of the gangue identification component 31 in the equipment main body 14 accurate, and the separation of the gangue and coal blocks by the air jet component 32 reliable.

[0051] As Figure 1 shown, the coal separation equipment has two first separation chambers 51 and one second separation chamber 52, and the two first separation chambers 51 are respectively located on both sides of the second separation chamber 52. With the above structure, the coal to be screened in the coal separation equipment falls and separates evenly.

[0052] Applying the technical solution of this embodiment has the following beneficial effects:

[0053] (1) The coal to be screened is filtered by the filter screen 4111 into small-particle coal to be screened and large-particle coal to be screened. The small-particle coal to be screened enters the second separation chamber 52 and falls on the feeding end of the second conveyor 22, and the large-particle coal to be screened enters the first separation chamber 51 and falls on the feeding end of the first conveyor 21. The jetting force of the air jet component 32 at the discharging end of the first conveyor 21 is adjusted according to the particle size of the coal to be screened on the first conveyor 21, and the jetting force of the air jet component 32 at the discharging end of the second conveyor 22 is adjusted according to the particle size of the coal to be screened on the second conveyor 22. The gangue identification component 31 is used to identify the gangue in the coal to be screened and its distribution, and the air jet components 32 arranged at the discharging end of the first conveyor 21 and the air jet component 32 arranged at the discharging end of the second conveyor 22 are controlled to work according to the distribution of the gangue. Thus, on the premise that the air jet component 32 can blow the gangue into the gangue collection sub-chamber 132, the coal blocks are not blown by the air jet component 32, and the coal blocks fall into the coal collection sub-chamber 131, completing the separation of the gangue and the coal, and improving the separation effect of the coal separation equipment on the coal blocks and the gangue;

[0054] (2) Utilize the impact force generated by the falling of the large-particle coal to be screened in the first separation chamber 51 to make the driving fan blade 4551 rotate. The driving fan blade 4551 drives the negative-pressure fan blade 457 to rotate, suck the dust in the first separation chamber 51 and the second separation chamber 52, improve the dust suction efficiency, and greatly save energy.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further discussion in subsequent drawings.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0058] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0059] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as limiting the scope of protection of the present invention.

[0060] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A coal preparation device, characterized in that, The coal preparation equipment includes: A coal preparation box (10) having a sequentially connected coal preparation chamber (11), a conveying chamber (12), and a collection chamber (13). A coal preparation inlet (111) is provided at the upper end of the coal preparation chamber (11), and a coal preparation outlet (112) communicating with the conveying chamber (12) is provided at the lower end of the coal preparation chamber (11); A conveying assembly (20) disposed in the conveying chamber (12) and extending in the horizontal direction. The feeding end of the conveying assembly (20) is located below the coal preparation outlet (112), and the discharging end of the conveying assembly (20) is located at the inlet of the collection chamber (13); A screening assembly (30) including a gangue identification member (31) and a jetting member (32). The jetting member (32) is disposed at the discharging end of the conveying assembly (20). The collection chamber (13) has a coal collection sub-chamber (131) and a gangue collection sub-chamber (132) spaced apart in the conveying direction of the conveying assembly (20); A separation assembly (40) disposed in the coal preparation chamber (11). The separation assembly (40) includes a separation plate (41) inclined below the coal preparation inlet (111) and a partition plate (42) disposed vertically. The upper end of the partition plate (42) is connected to the separation plate (41). The interval between the outer side wall of the partition plate (42) and the inner wall of the coal preparation chamber (11) forms a first separation chamber (51). The inner side wall of the partition plate (42) and the lower surface of the separation plate (41) jointly enclose a second separation chamber (52). The lower end of the separation plate (41) extends to the inlet of the first separation chamber (51). The separation plate (41) has a through separation opening (411) communicating with the second separation chamber (52). A filter screen (4111) is provided at the separation opening (411). The outlets of the first separation chamber (51) and the second separation chamber (52) jointly form the coal preparation outlet (112). The conveying assembly (20) includes a first conveying member (21) located below the outlet of the first separation chamber (51) and a second conveying member (22) located below the outlet of the second separation chamber (52). The jetting member (32) is provided at the discharging ends of the first conveying member (21) and the second conveying member (22); The separation assembly (40) further includes a first connecting pipe (451), a second connecting pipe (452), and a dust removal pipe (453). The separation assembly (40) further has a negative pressure dust removal chamber (454). The two ends of the first connecting pipe (451) are respectively connected to the first separation chamber (51) and the second separation chamber (52). The inlet of the second connecting pipe (452) is connected to the first connecting pipe (451). The outlet of the second connecting pipe (452) is connected to the negative pressure dust removal chamber (454). The inlet of the dust removal pipe (453) is connected to the negative pressure dust removal chamber (454). The outlet of the dust removal pipe (453) is connected to the outside; The separation component (40) further includes a driving member (455), an installation cylinder (456), and a negative pressure fan blade (457). The inner cavity of the installation cylinder (456) forms the negative pressure dust removal cavity (454). The negative pressure fan blade (457) is disposed in the negative pressure dust removal cavity (454). The driving member (455) is drivingly connected to the negative pressure fan blade (457) to drive the negative pressure fan blade (457) to rotate; The driving member (455) includes a driving fan blade (4551) rotatably disposed in the first separation cavity (51). The driving fan blade (4551) is located below the inlet of the first separation cavity (51). The driving fan blade (4551) is drivingly connected to the negative pressure fan blade (457).

2. The coal preparation equipment according to claim 1, characterized in that, The separation component (40) further includes an inclined first buffer plate (43). The first buffer plate (43) is located between the separation plate (41) and the coal washing inlet (111). The coal to be screened entering from the coal washing inlet (111) can be moved by the first buffer plate (43) to the separation plate (41).

3. The coal preparation equipment according to claim 2, characterized in that The coal washing equipment further includes an inclined second buffer plate (44). One end of the second buffer plate (44) is connected to the inner side wall of the coal washing cavity (11). The other end of the second buffer plate (44) extends between the first buffer plate (43) and the separation plate (41). The coal to be screened entering from the coal washing inlet (111) can be sequentially moved to the separation plate (41) through the first buffer plate (43) and the second buffer plate (44).

4. The coal preparation equipment according to claim 1, characterized in that, A third buffer plate (46) is inclinedly disposed on the inner side wall of the first separation cavity (51). The third buffer plate (46) is located between the inlet of the first separation cavity (51) and the driving fan blade (4551). The projection of the third buffer plate (46) on the horizontal plane covers at least half of the projection of the driving fan blade (4551) on the horizontal plane.

5. The coal preparation equipment according to any one of claims 1 to 3, characterized in that, The coal washing box (10) includes an equipment main body (14) and a vibration box (15). The coal washing cavity (11) is disposed in the vibration box (15). The conveying cavity (12) and the collection cavity (13) are both disposed in the equipment main body (14). The vibration box (15) is disposed on the equipment main body (14) so as to be capable of vibrating up and down. The separation component (40) is disposed in the vibration box (15).

6. The coal preparation equipment according to claim 5, characterized in that, The vibration box (15) includes a box body (151), a vibration motor (152), and a shock absorption spring (153). The vibration motor (152) is disposed on the box body (151). The upper end of the shock absorption spring (153) abuts against the box body (151). The lower end of the shock absorption spring (153) abuts against the equipment main body (14).

7. The coal preparation equipment according to any one of claims 1 to 3, characterized in that, The coal washing equipment has two of the first separation cavities (51) and one second separation cavity (52). The two first separation cavities (51) are respectively located on both sides of the second separation cavity (52).

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