Material distribution device and material sorting system

Abstract

The present disclosure belongs to the technical field of coal washing equipment, and particularly relates to a distributing device and a material washing system. The present disclosure provides a distributing device for conveying the material after heavy medium coal separation to a dehydration screen for processing. The distributing device comprises a box body, a flow guide, an adjusting baffle and an angle adjusting mechanism. The box body is provided with a feeding port and a discharging port. The discharging port is located below the feeding port. The flow guide is arranged on the box body and has a flow guide channel. The flow guide channel is arranged downwardly inclined relative to the flow guide. The flow guide channel is in butt joint communication with the first port on the high side and the discharging port. The adjusting baffle is rotatably arranged on the flow guide and is configured to close the second port on the low side of the flow guide channel under the self weight, or to open the second port against the self weight under the pushing action of the material. The angle adjusting mechanism is configured to adjust the rotation angle of the adjusting baffle in the direction of opening the second port. In this way, the distributing device of the present disclosure can make the distribution more uniform.

Description

Technical Field

[0001] This disclosure belongs to the technical field of coal washing and beneficiation equipment, and specifically relates to a material feeding device and a material washing system. Background Technology

[0002] In the traditional heavy media coal preparation field, a qualified medium pump maintains a certain pressure to draw qualified medium liquid from the qualified medium tank to the hydrocyclone. The raw coal to be selected enters the hydrocyclone through the feed port. Under the action of the hydrocyclone, clean coal, middlings, and gangue are separated to provide qualified clean coal products for coking. After that, it is transported to the dewatering screen through the material distribution device for dewatering treatment.

[0003] The existing feeding device does not have an effective material blocking mechanism at the front end, and the material flows out directly, which can easily cause the material flow direction to deviate, and then form local accumulation on the screen surface of the dewatering screen, directly affecting the effective utilization rate of the screen surface and the screening efficiency. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a fabric preparation device and a material washing system.

[0005] In a first aspect, this disclosure provides a feeding device for conveying material after heavy media coal preparation to a dewatering screen for processing, the feeding device comprising: The box body is provided with a feed inlet and a discharge outlet, with the discharge outlet located below the feed inlet; A flow guide is provided on the housing and has a flow channel. The flow channel is inclined downward relative to the flow guide and the first port of the flow channel on the high side is connected to the discharge port. An adjusting baffle is rotatably disposed on the flow guide and configured to close the second port of the flow guide channel on the lower side under its own weight, or to open the second port against its own weight under the pushing action of the material. An angle adjustment mechanism is configured to adjust the rotation angle of the adjustment baffle in the direction of opening the second port.

[0006] In one embodiment of this disclosure, the angle adjustment mechanism includes: At least one adjusting rod, wherein at least one adjusting rod is disposed on the adjusting baffle on the side opposite to the second port; An adjusting block is configured to be detachably disposed at different positions on the adjusting rod to adjust the lever arm of the weight of the adjusting block relative to the rotation axis of the adjusting baffle.

[0007] In one embodiment of this disclosure, along the extending direction of the adjusting rod, the adjusting rod is provided with a plurality of gear slots spaced apart in sequence, and the adjusting block is sleeved in the gear slots.

[0008] In one embodiment of this disclosure, a plurality of stop teeth are distributed at intervals along the adjusting rod, two adjacent stop teeth form the gear slot, and each stop tooth is inclined relative to the adjusting rod and points towards the adjusting baffle.

[0009] In one embodiment of this disclosure, the extension direction of the adjusting rod is parallel to the extension direction of the flow guiding channel.

[0010] In one embodiment of this disclosure, the material chamber of the box is connected to the inlet and the outlet. A partition baffle of preset height is provided in the material chamber to divide the material chamber into a buffer zone and an outlet zone. The buffer zone is located directly below the inlet, and the outlet zone is connected to the outlet. The preset height is configured to allow the material in the buffer zone to accumulate to a preset amount and then enter the outlet zone through the partition baffle.

[0011] In one embodiment of this disclosure, at least one reinforcing plate is provided in the buffer zone, the reinforcing plate being disposed between the partition baffle and the inner wall of the box.

[0012] In one embodiment of this disclosure, the volume of the buffer zone is greater than the volume of the discharge zone.

[0013] In one embodiment of this disclosure, the box body is a square box body, and the discharge port is a square discharge port; The discharge port is located at the bottom of one side wall of the box and extends to the edges of both ends of the side wall. The partition baffle is arranged parallel to the side wall.

[0014] Secondly, this disclosure provides a material washing system, including a heavy media coal preparation device and a dewatering screen. The heavy media coal preparation device is configured to separate raw coal into clean coal and impurities, and output the material to a material distribution device through a material outlet. The material distribution device conveys the material to the dewatering screen for dewatering. The material distribution device is the material distribution device described in any of the above embodiments.

[0015] One of the beneficial effects of this disclosure is that the housing of the material feeding device of this disclosure is equipped with a guide member having a flow channel. The flow channel is inclined downwards, and the first port on the high side of the flow channel is connected to the outlet of the housing. The second port on the low side is closed by an adjusting baffle that is rotatably mounted on the guide member. The adjusting baffle overcomes its own weight under the pushing action of the material, thereby opening the second port. At the same time, this disclosure uses an angle adjustment mechanism to adjust the rotation angle of the adjusting baffle in the direction of opening the second port.

[0016] Thus, the material feeding device of this disclosure controls the flow rate of the material by setting an adjustable baffle that can block the material at the second port of the flow channel and controlling the rotation angle of the adjustable baffle when it is opened by the angle adjustment mechanism, so as to make the material feeding more uniform, avoid the material flowing out directly, and prevent the material flow direction from easily deviating, resulting in local accumulation of output material.

[0017] Furthermore, this disclosure also provides a material washing system that separates clean coal material from raw coal using a heavy media coal preparation device, and then uses a material distribution device to uniformly transport the separated clean coal material to the screen surface of a dewatering screen for dewatering and demediation treatment. By setting up a material distribution device, the material washing system of this disclosure ensures that the clean coal material flows out uniformly and is distributed on the dewatering screen, thus avoiding local accumulation of the output clean coal material on the screen surface of the dewatering screen. Attached Figure Description

[0018] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are included and form part of this specification, and together with their description serve to explain the principles of this disclosure.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a fabric-making device provided in an embodiment of the present disclosure; Figure 2 This is a cross-sectional perspective view of a fabric-making device according to an embodiment of the present disclosure; Figure 3 This is a three-dimensional structural diagram of a fabric-making device with the housing concealed, according to an embodiment of this disclosure. Figure 4 yes Figure 3 A schematic diagram of the side view structure; Figure 5 yes Figure 3 A front view schematic diagram of the angle adjustment mechanism is omitted; Figure 6 This is a schematic diagram of a heavy media coal preparation unit; Figure 7 This is a three-dimensional structural diagram of the fabric feeding device and the dewatering screen provided in an embodiment of the present disclosure.

[0020] Figures 1 to 7 The correspondence between the component names and the reference numerals in the figures is as follows: 01 Heavy medium cyclone, 012 Feed inlet, 013 Clean coal outlet, 014 Pressure transmitter, 015 Mid-coal outlet, 02 Second-stage cyclone, 021 Mid-coal outlet, 022 Gangue outlet, 03 Dewatering screen; 1. Box body, 11. Inlet, 111. Inlet pipe, 12. Outlet, 13. Divider baffle, 14. Reinforcing plate, 15. Buffer zone, 16. Discharge area; 2. Flow guide component, 21. Flow guide channel, 211. First port, 212. Second port; 3. Adjust the baffle; 4. Angle adjustment mechanism, 41. Adjustment rod, 411. Stop tooth, 42. Adjustment block; F represents gravity, f represents the component force, and l represents the lever arm. Detailed Implementation

[0021] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0022] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0024] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0026] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0027] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0028] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0029] It should be noted that when describing the structure and working principle of the fabric feeding device, please refer to [link to relevant documentation] for the direction of material movement. Figure 2 as well as Figure 7 In this diagram, the dashed line with arrows represents the movement path of the material, and the dotted line with arrows represents the flow path of the medium water.

[0030] In the traditional heavy media coal preparation field, a qualified medium pump maintains a certain pressure to draw qualified medium liquid from the qualified medium tank to the hydrocyclone. The raw coal to be selected enters the hydrocyclone through the feed port. Under the action of the hydrocyclone, clean coal, middlings, and gangue are separated to provide qualified clean coal products for coking. After that, it is transported to the dewatering screen through the material distribution device for dewatering treatment.

[0031] The existing feeding device does not have an effective material blocking mechanism at the front end, and the material flows out directly, which can easily cause the material flow direction to deviate, and then form local accumulation on the screen surface of the dewatering screen, directly affecting the effective utilization rate of the screen surface and the screening efficiency.

[0032] To this end, this disclosure provides a feeding device for conveying material after heavy media coal preparation to a dewatering screen for processing. The feeding device includes a housing, a guide member, an adjusting baffle, and an angle adjusting mechanism. The housing has an inlet and an outlet, with the outlet located below the inlet. The guide member is disposed on the housing and has a guiding channel. The guiding channel is inclined downward relative to the guide member, and the first port of the guiding channel on the higher side is connected to the outlet. The adjusting baffle is rotatably disposed on the guide member and is configured to close the second port of the guiding channel on the lower side under its own weight, or to open the second port against its own weight under the pushing action of the material. The angle adjusting mechanism is configured to adjust the rotation angle of the adjusting baffle in the direction of opening the second port.

[0033] In detail, the housing of the fabric feeding device disclosed herein receives material through an inlet and outputs material through an outlet, and is equipped with a guide member having a flow guiding channel. The flow guiding channel is inclined downward, and the first port on the high side of the flow guiding channel is connected to the outlet of the housing. The second port on the low side is closed by an adjusting baffle rotatably mounted on the guide member. The adjusting baffle overcomes its own weight under the pushing action of the material, thereby opening the second port. At the same time, the present disclosure uses an angle adjusting mechanism to adjust the rotation angle of the adjusting baffle in the direction of opening the second port.

[0034] Thus, the material feeding device of this disclosure controls the flow rate of the material by setting an adjustable baffle that can block the material at the second port of the flow channel and controlling the rotation angle of the adjustable baffle when it is opened by the angle adjustment mechanism, so as to make the material feeding more uniform, avoid the material flowing out directly, and prevent the material flow direction from easily deviating, resulting in local accumulation of output material.

[0035] Furthermore, this disclosure also provides a material washing system that separates clean coal material from raw coal using a heavy media coal preparation device, and then uses a material distribution device to uniformly transport the separated clean coal material to the screen surface of a dewatering screen for dewatering and demediation treatment. By setting up a material distribution device, the material washing system of this disclosure ensures that the clean coal material flows out uniformly and is distributed on the dewatering screen, thus avoiding local accumulation of the output clean coal material on the screen surface of the dewatering screen.

[0036] For ease of understanding, please refer to the following: Figures 1 to 7 The specific structure and working principle of the fabric device and material washing system provided in this disclosure will be described in detail with reference to the embodiments.

[0037] In one embodiment, this disclosure provides a feeding device for conveying material after heavy media coal preparation to a dewatering screen 03 for processing. The feeding device includes a housing 1, a guide member 2, an adjusting baffle 3, and an angle adjusting mechanism 4. The housing 1 has an inlet 11 and an outlet 12, with the outlet 12 located below the inlet 11. The guide member 2 is disposed on the housing 1 and has a guiding channel 21. The guiding channel 21 is inclined downward relative to the guide member 2, and the first port 211 on the high side of the guiding channel 21 is connected to the outlet 12. The adjusting baffle 3 is rotatably disposed on the guide member 2 and is configured to close the second port 212 on the low side of the guiding channel 21 under its own weight, or to open the second port 212 against its own weight under the pushing action of the material. The angle adjusting mechanism 4 is configured to adjust the rotation angle of the adjusting baffle 3 in the direction of opening the second port 212.

[0038] In detail, combined Figure 1 and Figure 2The housing 1 of the fabric feeding device disclosed herein has an inlet 11 and an outlet 12, with the outlet 12 located below the inlet 11, allowing the material to fall and be output under the action of gravity F. Furthermore, the housing 1 is also provided with a guide member 2 having a guide channel 21, which is inclined downwards. The first port 211 on the high side of the guide channel 21 is connected to the outlet 12 of the housing 1, and the second port 212 on the low side is closed by an adjusting baffle 3 rotatably provided on the guide member 2, so that the material enters the guide channel 21 from the first port 211 and flows out from the second port 212. The adjusting baffle 3 overcomes its own weight under the pushing action of the material, thereby opening the second port 212. At the same time, the present disclosure uses an angle adjusting mechanism 4 to adjust the rotation angle of the adjusting baffle 3 in the direction of opening the second port 212.

[0039] Thus, the material feeding device of this disclosure sets an adjustable baffle 3 that can block the material at the second port 212 of the flow channel 21, and controls the rotation angle of the adjustable baffle 3 when it is opened by the angle adjustment mechanism 4, thereby controlling the flow rate of the material when it flows out, spreading the outflowing material evenly, making the material more uniform, avoiding the material from flowing out directly, and preventing the material flow direction from easily deviating, resulting in local accumulation of output material, causing equipment overload, and aggravating local wear.

[0040] See Figure 2 , Figure 3 and Figure 4 In one embodiment of this disclosure, the angle adjustment mechanism 4 includes at least one adjustment rod 41 and an adjustment block 42. The adjustment rod 41 is disposed on the side opposite to the second port 212 on the adjustment baffle 3. The adjustment block 42 is configured to be detachably disposed at different positions of the adjustment rod 41 to adjust the lever arm l between the weight F of the adjustment block 42 and the rotation axis of the adjustment baffle 3.

[0041] In detail, this disclosure provides three adjusting rods 41 evenly distributed on the adjusting baffle 3 along the direction perpendicular to the material flow. This ensures that when the second port 212 is large, the angle adjusting structure can control the overall rotation angle of the adjusting baffle 3, avoiding the situation where the adjusting baffle 3 is easily tilted to one side under the impact of the material when a single adjusting rod 41 is set, which would lead to material flow deviation. At the same time, it can also independently adjust the local area of ​​the second port 212 to make the material flow uniform throughout the entire length of the opening, avoiding local material interruption or accumulation.

[0042] Furthermore, each adjusting rod 41 is set on the other side of the adjusting baffle 3 opposite to the second port 212, which can prevent the adjusting rod 41 from being affected by the material flow. At the same time, the operator can operate the angle adjusting mechanism 4 to adjust the rotation angle of the adjusting baffle 3 at any time according to the flow state of the material.

[0043] Furthermore, combined Figure 5 In one embodiment, the adjusting baffle 3 and the guide member 2 are rotatably connected by a hinge, and the adjusting baffle 3 is provided with a through hole to place the adjusting rod 41 on the adjusting baffle 3.

[0044] Furthermore, combining Figure 4 The adjusting block 42 is detachably mounted at different positions on the adjusting rod 41 to adjust the lever arm l of the weight F of the adjusting block 42 relative to the rotation axis of the adjusting baffle 3. Specifically, a component f of the weight F of the adjusting block 42 acts on the adjusting baffle 3. By adjusting the point of application of the weight F, the length of the lever arm l of the component f is adjusted, thereby adjusting the torque acting on the adjusting baffle 3. For example, when the material flow rate is small, the adjusting block 42 of this disclosure is moved towards the free end of the adjusting rod 41 to increase the torque acting on the adjusting baffle and decrease the opening size between the second port 212 and the adjusting baffle 3, so that the material flowing out of the second port 212 is uniform; or, when the material flow rate is large, the reverse operation is performed.

[0045] See Figure 3 and Figure 4 In one embodiment of this disclosure, along the extending direction of the adjusting rod 41, the adjusting rod 41 is provided with a plurality of gear slots at intervals, and the adjusting block 42 is sleeved in the gear slot.

[0046] In detail, this disclosure provides a plurality of position slots arranged sequentially at intervals along the extension direction of the adjusting rod 41, and fits the adjusting block 42 into the position slots. This allows the adjusting block 42 to be inserted into different slots to directly correspond to different parameters without relying on estimation by hand or additional scale. Furthermore, the position slots can restrict the adjusting block 42 from sliding along the axial direction of the adjusting rod 41.

[0047] In addition, in one embodiment, the adjusting block 42 and the adjusting rod 41 can be threaded together, with an external thread on the adjusting rod 41 and a through hole with an internal thread on the adjusting block 42. The lever arm l between the weight F of the adjusting block 42 and the rotation axis of the adjusting baffle 3 can be adjusted by rotating the adjusting block 42.

[0048] See Figure 3 and Figure 4 In one embodiment of this disclosure, a plurality of stop teeth 411 are distributed at intervals along the adjusting rod 41, two adjacent stop teeth 411 form a stop groove, and each stop tooth 411 is inclined relative to the adjusting rod 41 pointing towards the adjusting baffle 3.

[0049] Specifically, along the extending direction of the adjusting rod 41, a plurality of stop teeth 411 are spaced apart on the adjusting rod 41. The gap between two adjacent stop teeth 411 and the gap between them forms a stop groove. Simultaneously, the diameter of the through hole in the adjusting block 42 is greater than the height of the adjusting rod 41 and the stop teeth 411 along the direction of gravity F. Thus, the adjusting block 42 can be detachably suspended between two adjacent stop teeth 411. Alternatively, in one embodiment, the adjusting block 42 can have a square slot, allowing the slot to engage with the adjusting rod 41 between two adjacent stop teeth 411. The square slot also prevents the adjusting block 42 from rotating and falling off. Those skilled in the art can choose according to actual needs.

[0050] Furthermore, each stop tooth 411 is inclined relative to the adjusting rod 41 pointing towards the adjusting baffle 3. When the inclined tooth surface contacts the adjusting block 42, the adjusting block 42 will automatically lock into the gap between two adjacent stop teeth 411 without the need for an additional locking structure.

[0051] See Figure 4 In one embodiment of this disclosure, the extending direction of the adjusting rod 41 is parallel to the extending direction of the guide channel 21.

[0052] Thus, this disclosure sets the adjusting rod 41 at an angle along the extension direction of the guide channel 21, thereby further increasing the range of the lever arm l of the component force f acting on the adjusting baffle 3, and thus widening the torque adjustment range acting on the adjusting baffle 3. This allows the adjusting baffle 3 to have a more flexible force adjustment capability when dealing with fluctuations in material flow. At the same time, it avoids extending the adjusting rod 41, which would make the excessively long adjusting rod 41 prone to deformation or wear, thus extending its service life.

[0053] See Figure 1 and Figure 2 In one embodiment of this disclosure, the material chamber of the housing 1 is connected to the inlet 11 and the outlet 12. A partition baffle 13 of a preset height is provided in the material chamber to divide the material chamber into a buffer zone 15 and an outlet zone 16. The buffer zone 15 is located directly below the inlet 11. The outlet zone 16 is connected to the outlet 12. The preset height is configured to allow the material in the buffer zone 15 to accumulate to a preset amount and then enter the outlet zone 16 through the partition baffle 13.

[0054] In detail, the material chamber of the housing 1 of this disclosure is connected to the inlet 11 and the outlet 12, and the bottom surface of the material chamber is provided with a partition baffle 13 of a preset height. The partition baffle 13 divides the bottom of the material chamber into a buffer zone 15 and an outlet zone 16. The buffer zone 15 is located directly below the inlet 11, and the outlet zone 16 is connected to the outlet 12. In this way, the material enters the material chamber from the inlet 11 and falls into the buffer zone 15. After accumulating to a preset amount in the buffer zone 15, it overflows from above the partition baffle 13 into the outlet zone 16. Thus, the buffer zone 15 stores a certain amount of material, thereby avoiding continuous and large impacts on the bottom surface of the housing 1 caused by the falling material, preventing deformation of the bottom of the housing 1, and extending the service life of the housing 1.

[0055] Furthermore, since the material overflows from above the partition baffle 13 and enters the discharge area 16 after being deposited in the buffer zone 15 to the guide channel 21, the material flowing out of the discharge port 12 can be evenly distributed, reducing the material deviation.

[0056] In addition, the feed inlet 11 can be set on the top of the box 1 directly above the buffer zone 15, so that the material enters the buffer zone 15 vertically; or, the feed inlet 11 can be set on the side wall of the box 1 above one side of the buffer zone 15, so that the material can flow into the buffer zone 15 along the inner wall of the material cavity, reducing the impact on the bottom of the box 1.

[0057] See Figure 1 and Figure 2 In one embodiment of this disclosure, at least one reinforcing plate 14 is provided in the buffer zone 15, and the reinforcing plate 14 is disposed between the partition baffle 13 and the inner wall of the box 1.

[0058] Thus, this disclosure provides at least one reinforcing plate 14 between the partition baffle 13 within the buffer zone 15 and the inner wall of the housing 1, constructing a supporting frame at the bottom of the material cavity to compensate for the insufficient strength of the housing 1 itself, and to prevent the housing 1 from undergoing permanent damage or deformation beyond the allowable range under the impact of materials. Simultaneously, the reinforcing plate 14 can be arranged perpendicularly to the partition baffle 13.

[0059] Furthermore, in one embodiment, the present disclosure may provide a plurality of reinforcing plates 14 between the inner wall of the housing 1 and the partition baffle 13, and the plurality of reinforcing plates 14 may be evenly distributed.

[0060] See Figure 1 and Figure 2 In one embodiment of this disclosure, the volume of buffer zone 15 is greater than the volume of discharge zone 16.

[0061] Specifically, the volume of the buffer zone 15 in the material cavity of this disclosure is larger than the volume of the discharge zone 16. In this way, it can accommodate boxes of different sizes. Furthermore, the material entering through the inlet 11 can fall completely into the buffer zone 15 directly below, without any part of it flowing out of the discharge zone 16 and causing the material flow to be skewed. In addition, it avoids the discharge zone 16 being too large, which would cause the material to flow out of the discharge zone 16 and then deviate again, affecting the uniform distribution of the material when it overflows from the partition baffle 13.

[0062] See Figure 1 and Figure 2 In one embodiment of this disclosure, the box body 1 is a square box body 1, and the discharge port 12 is a square discharge port 12; the discharge port 12 is located at the bottom end of one side wall of the box body 1 and extends to the edges of both ends of the side wall, and the partition baffle 13 is arranged parallel to the side wall.

[0063] In detail, the housing 1 of this disclosure is square, which has a simple structure, is easy to process, adapts to various application scenarios, and is easy to cooperate with other devices. On this basis, the square discharge port 12 is located at the bottom of one side wall of the housing 1 and extends to the edge of the side wall along the direction perpendicular to the material flow. In this way, the material can be evenly distributed in a wide range when it flows out, and then evenly cover the surface of the next device. In addition, since the material after heavy media coal preparation is relatively viscous, the discharge port 12 is square, which can reduce the risk of blockage of the discharge port 12.

[0064] Furthermore, the partition baffle 13 is arranged parallel to the side wall. Thus, the discharge area 16 separated by the partition baffle 13 in the material cavity is connected to the discharge port 12. After the material is deposited in the buffer zone 15 to a preset amount, the overflowing material can also pass evenly through the square discharge port 12 and enter the guide channel 21, and finally be evenly distributed on the screen surface of the dewatering screen 03.

[0065] See Figure 6 and Figure 7 In one embodiment of this disclosure, a material washing system is provided, including a heavy medium coal preparation device and a dewatering screen 03. The heavy medium coal preparation device is configured to separate raw coal into clean coal and impurities, and output the material to a material distribution device through a material outlet. The material distribution device conveys the material to the dewatering screen 03 for dewatering. The material distribution device is the material distribution device shown in any of the above embodiments.

[0066] For details, see Figure 6Heavy media coal preparation is a physical coal preparation method that utilizes density differences to efficiently separate coal. Its core principle is to use a suspension with a density between clean coal and gangue (or middlings) as a medium, employing Archimedes' principle to separate coal from impurities. First, the mixture of suspension and coal enters the heavy media hydrocyclone 01 through the raw coal inlet 012. A centrifugal force field is generated by the pressure transmitter 014, separating the coal into clean coal and middlings. The low-density clean coal moves towards the center and is discharged through the clean coal outlet 013; the high-density middlings sinks along the wall and is discharged from the middlings outlet 015 at the bottom. The middlings are then transported to the second-stage hydrocyclone 02, where they are further separated into middlings and gangue, discharged through the middlings outlet 021 and gangue outlet 022, respectively. Afterward, the separated clean coal, middlings, and gangue undergo further processing.

[0067] Subsequently, the clean coal material is transported to the feeding device disclosed herein through the feed pipeline. The feeding device evenly transports the material onto the screen surface of the dewatering screen 03 to perform dewatering and demediuming treatment, thereby obtaining clean coal.

[0068] This disclosure also provides a material washing system, which separates clean coal material from raw coal using a heavy media coal preparation device, and then uses a material distribution device to uniformly transport the separated clean coal material to the screen surface of a dewatering screen 03 for dewatering and demediation treatment. By setting up a material distribution device, the material washing system of this disclosure ensures that the clean coal material flows out evenly and is distributed on the dewatering screen 03, avoiding local accumulation of the output clean coal material on the screen surface of the dewatering screen 03.

[0069] The following section will use an application scenario to further illustrate the working principle of the fabric distribution device and material washing system disclosed herein.

[0070] First, see Figure 1 The mixture of suspension and coal enters the heavy medium cyclone 01 through the raw coal inlet 012. The centrifugal force field generated by the pressure transmitter 014 separates it into clean coal and middlings. The low-density clean coal moves towards the center and is discharged through the clean coal outlet 013. The high-density middlings sinks along the wall and is discharged from the middlings outlet 015 at the bottom. The middlings are transported to the second-stage cyclone 02, where they are further separated into middlings and gangue and discharged through the middlings outlet 021 and gangue outlet 022, respectively.

[0071] Afterwards, the refined coal material enters the material chamber of the box 1 through the feed pipe 111 from the feed port 11 and falls into the buffer zone 15 separated by the partition baffle 13 directly below. Then, after the material settles in the buffer zone 15 to a preset amount, it overflows from above the partition baffle 13 into the discharge zone 16, and then enters the guide channel 21 of the guide component 2 through the discharge port 12. At this time, the adjusting baffle 3 closes the second port 212 of the guide channel 21 under its own weight. The material passes through the guide channel 21 and pushes open the adjusting baffle 3 under its own weight, and then flows out from the second port 212.

[0072] At this time, when the material flow rate is small, the adjusting block 42 is moved to the free end of the adjusting rod 41 to increase the torque acting on the adjusting baffle 3 and reduce the rotation angle of the adjusting baffle 3 being pushed open by the material, so that the material flows out evenly and falls onto the screen surface of the dewatering screen 03 for dewatering treatment.

[0073] Thus, the fabric feeding device disclosed herein controls the flow rate of the material during outflow, flattens the outflowing material, makes the fabric more uniform, and avoids the material flowing out directly. The flow direction of the material is prone to deviation, resulting in local accumulation of the output material, causing equipment overload and increased local wear.

[0074] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A feeding device for conveying material after heavy media coal preparation to a dewatering screen (03) for processing, characterized in that, The fabric assembly includes: The box body (1) is provided with a feed inlet (11) and a discharge outlet (12), and the discharge outlet (12) is located below the feed inlet (11); A flow guide (2) is provided on the box (1) and has a flow guide channel (21). The flow guide channel (21) is inclined downward relative to the flow guide (2), and the first port (211) of the flow guide channel (21) on the high side is connected to the discharge port (12). Adjusting baffle (3), which is rotatably disposed on the guide member (2) and configured to close the second port (212) of the guide channel (21) on the lower side under its own weight, or to open the second port (212) against its own weight under the pushing action of the material. An angle adjustment mechanism (4) is configured to adjust the rotation angle of the adjustment baffle (3) in the direction of opening the second port (212).

2. The fabric-making device according to claim 1, characterized in that, The angle adjustment mechanism (4) includes: At least one adjusting rod (41), at least one of the adjusting rods (41) is disposed on the adjusting baffle (3) on the opposite side of the second port (212); Adjustment block (42) is configured to be detachably disposed at different positions on the adjustment rod (41) to adjust the lever arm (l) between the weight (F) of the adjustment block (42) and the rotation axis of the adjustment baffle (3).

3. The fabric-making device according to claim 2, characterized in that, Along the extension direction of the adjusting rod (41), the adjusting rod (41) is provided with a number of gear slots at intervals, and the adjusting block (42) is sleeved in the gear slot.

4. The fabric-making device according to claim 3, characterized in that, A plurality of stop teeth (411) are distributed at intervals along the adjusting rod (41), and two adjacent stop teeth (411) form the gear slot, and each stop tooth (411) is inclined relative to the adjusting rod (41) towards the adjusting baffle (3).

5. The fabric-making device according to claim 4, characterized in that, The extension direction of the adjusting rod (41) is parallel to the extension direction of the guide channel (21).

6. The fabric-laying device according to any one of claims 1 to 5, characterized in that, The material chamber of the box (1) is connected to the feed inlet (11) and the discharge outlet (12). A partition baffle (13) of preset height is provided in the material chamber to divide the material chamber into a buffer zone (15) and a discharge zone (16). The buffer zone (15) is located directly below the feed inlet (11). The discharge zone (16) is connected to the discharge outlet (12). The preset height is configured to allow the material in the buffer zone (15) to accumulate to a preset amount and then enter the discharge zone (16) through the partition baffle (13).

7. The fabric-making device according to claim 6, characterized in that, At least one reinforcing plate (14) is provided in the buffer zone (15), and the reinforcing plate (14) is located between the partition baffle (13) and the inner wall of the box (1).

8. The fabric-making device according to claim 7, characterized in that, The volume of the buffer zone (15) is greater than the volume of the discharge zone (16).

9. The fabric-making device according to claim 8, characterized in that, The box body (1) is a square box body, and the discharge port (12) is a square discharge port; The discharge port (12) is located at the bottom of one side wall of the box (1) and extends to the edges of both ends of the side wall. The partition baffle (13) is arranged parallel to the side wall.

10. A material washing system, comprising a heavy media coal preparation device and a dewatering screen (03), characterized in that, The heavy media coal preparation device is configured to separate raw coal into clean coal and impurities, and output the material to a material distribution device through a material outlet. The material distribution device conveys the material to the dewatering screen (03) for dewatering. The material distribution device is the material distribution device according to any one of claims 1 to 9.

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