Medium adding device and medium adding system of medium storage of coal preparation plant

Abstract

This application provides a medium-addition device and system for a coal preparation plant's medium storage silo. The medium-addition device includes: a hopper with a receiving cavity, an inlet and an outlet communicating with the receiving cavity; multiple fixed blocks, circumferentially fixedly connected to the inner wall of the hopper; multiple telescopic rods, the fixed end of one telescopic rod being fixedly connected to the end of a fixed block facing the outlet; a filter screen, fixedly connected to the movable end of each telescopic rod, its circumferential abutting against the inner wall of the hopper, and having filter holes extending through it; multiple first springs, each first spring sleeved on one telescopic rod, the opposite ends of the first spring being fixedly connected to the fixed blocks and the filter screen respectively; and a vibration motor, fixedly connected to the filter screen. By utilizing the combined action of the vibration motor, fixed blocks, telescopic rods, and first springs, the filter screen is driven to vibrate fully, effectively removing impurities from the medium, improving filtration efficiency, reducing clogging, and improving the quality of subsequent medium addition.

Description

Technical Field

[0001] This utility model relates to the field of media addition technology in coal preparation plants, specifically to a media addition device and system for a media storage chamber in a coal preparation plant. Background Technology

[0002] In the coal preparation plant's production process, the media silo, as a key piece of equipment, is mainly used to store and supply the media materials required for the separation process, such as iron ore. In existing technologies, the media is mainly conveyed into the media silo via hoppers and screw conveyors. During the media feeding process, the media is placed in the hopper using relevant equipment, and then, through operational control, the media in the hopper enters the screw conveyor under gravity, and the screw conveyor then places the media into the media silo. However, in practical use, existing media feeding equipment cannot effectively remove impurities from the media, causing impurities to mix with the media, reducing the quality of the media, and ultimately affecting the coal preparation effect. Utility Model Content

[0003] In view of this, the present invention provides a medium-adding device and medium-adding system for a coal preparation plant medium storage tank to solve the above-mentioned technical problems.

[0004] The medium feeding device for a coal preparation plant's media silo provided by this utility model includes:

[0005] The hopper has a receiving cavity inside, and the hopper has an inlet and an outlet that communicate with the receiving cavity;

[0006] Multiple fixing blocks are fixedly connected to the inner wall of the hopper at circumferential intervals.

[0007] Multiple telescopic rods, with one fixed end of the telescopic rod being fixedly connected to one end of the fixed block facing the discharge port;

[0008] A filter screen is fixedly connected to the movable end of each of the telescopic rods. The filter screen circumferentially abuts against the inner wall of the hopper. The filter screen has filter holes that extend through it.

[0009] Multiple first springs, one first spring sleeved on one telescopic rod, and the opposite ends of the first springs are respectively fixedly connected to the fixed block and the filter screen;

[0010] A vibration motor is fixedly connected to the filter screen.

[0011] Optionally, the medium feeding device in the coal preparation plant's medium silo further includes:

[0012] A drive shaft passes through the hopper and the filter screen, extending into the receiving cavity on the side of the filter screen facing the discharge port. A receiving groove is provided on the side wall of the drive shaft, and the receiving groove is located on the side of the filter screen facing the inlet.

[0013] A first drive assembly is connected to the drive shaft and is used to drive the drive shaft to rotate.

[0014] A second spring is disposed in the receiving groove, and the first end of the second spring is fixedly connected to the inner wall of the receiving groove on the side away from the filter screen.

[0015] A sliding block is disposed in the receiving groove and fixedly connected to the second end of the second spring. The sliding block can slide in the receiving groove along the extension direction of the transmission shaft.

[0016] The first scraper is fixedly connected to the side of the sliding block away from the drive shaft and abuts against the filter screen.

[0017] Optionally, the first driving component includes:

[0018] First motor;

[0019] The first rotating rod is fixedly connected to the output shaft of the first motor;

[0020] A first bevel gear is sleeved on the first rotating rod and is fixedly connected to the first rotating rod;

[0021] The second bevel gear is sleeved on the end of the drive shaft that protrudes from the hopper and is fixedly connected to the drive shaft. The second bevel gear meshes with the first bevel gear.

[0022] Optionally, the drive shaft is provided with a flow groove along its extension direction;

[0023] The medium feeding device in the coal preparation plant's media silo also includes:

[0024] A blower plate is provided on the side of the filter screen facing the discharge port and is fixedly connected to the drive shaft. A connecting groove is provided in the blower plate and the connecting groove is connected to the flow groove. A plurality of blow holes are provided at intervals on the side of the blower plate facing the filter screen. Each blow hole is connected to the connecting groove and a one-way valve is installed in each blow hole.

[0025] An air supply pipe, the first end of which is connected to the flow groove inside the end of the drive shaft that protrudes from the hopper;

[0026] An air supply mechanism, wherein the air outlet of the air supply mechanism is connected to the second end of the air supply pipe.

[0027] Optionally, the air supply mechanism includes:

[0028] The cover has a cavity inside and an air outlet communicating with the cavity.

[0029] A rotating shaft, the two ends of which pass through the cover and are rotatably connected to the cover;

[0030] Multiple fan blades, wherein the multiple fan blades are fixedly connected to the rotating shaft at circumferential intervals within the accommodating cavity;

[0031] The second drive component is connected to the rotating shaft and is used to drive the rotating shaft to rotate.

[0032] Optionally, the second driving component includes:

[0033] Second motor;

[0034] The second rotating rod is fixedly connected to the output shaft of the second motor;

[0035] A first pulley, on which the second rotating rod is sleeved and fixedly connected;

[0036] The second pulley is fitted onto one end of the rotating shaft that protrudes from the cover and is fixedly connected to the rotating shaft;

[0037] A belt, which is fitted onto the first pulley and the second pulley and is connected to the first pulley and the second pulley in a driving connection.

[0038] Optionally, the medium feeding device in the coal preparation plant's medium silo further includes:

[0039] The second scraper is disposed on the side of the filter screen facing the discharge port, fixedly connected to the drive shaft, and in clearance fit with the inner wall of the hopper.

[0040] Optionally, the medium feeding device in the coal preparation plant's medium silo further includes:

[0041] A buffer ring is disposed on the side of the filter screen facing the feed inlet. The outer circumferential wall of the buffer ring is fixedly connected to the inner circumferential wall of the hopper, and the inner wall of the buffer ring is set as an inclined surface.

[0042] Optionally, the medium feeding device in the coal preparation plant's medium silo further includes:

[0043] A weight sensor is disposed in the receiving cavity on the side of the filter screen facing the discharge port, for monitoring the weight of the medium;

[0044] A solenoid valve, wherein the solenoid valve is installed inside the discharge port;

[0045] The controller has its input terminal communicatively connected to the output terminal of the weight sensor, and its output terminal communicatively connected to the control terminal of the solenoid valve.

[0046] This utility model also provides a medium feeding system for a coal preparation plant medium silo, including a screw conveyor and a medium feeding device for the coal preparation plant medium silo as described in any of the above claims, wherein the discharge port of the hopper of the medium feeding device for the coal preparation plant medium silo is connected to the inlet of the screw conveyor.

[0047] The technical solution provided by this utility model has at least the following beneficial effects compared with the prior art:

[0048] The medium feeding device and system of the coal preparation plant medium silo of this utility model utilize the combined action of the vibrating motor, the fixed block, the telescopic rod and the first spring to drive the filter screen to vibrate fully, so that the medium with appropriate particle size can pass through the filter screen smoothly, while the larger impurities are retained on the filter screen. This not only effectively removes impurities from the medium, but also improves filtration efficiency, reduces clogging and improves the quality of subsequent medium feeding. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of a medium-adding device for a coal preparation plant media storage according to an embodiment of the present invention;

[0050] Figure 2 for Figure 1 The diagram shows the internal structure of the dielectric addition device.

[0051] Figure 3 for Figure 2 A schematic diagram showing the connection relationship between the filter screen and the telescopic rod of the media adding device;

[0052] Figure 4 for Figure 2 A schematic diagram showing the connection relationship between the drive shaft of the medium-adding device and the first scraper, the blowing plate, and the second scraper.

[0053] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0054] Figure 6 for Figure 2 A schematic diagram of the air supply mechanism of the medium-addition device shown;

[0055] Figure 7for Figure 2 A schematic diagram of the bottom of the hopper of the medium-adding device shown;

[0056] Figure 8 for Figure 1 The diagram shows the connection between the medium-adding device and the screw conveyor.

[0057] Figure label:

[0058] 1: Hopper; 2: Fixed block; 3: Telescopic rod; 4: Filter screen; 5: First spring; 6: Vibrating motor; 7: Drive shaft; 71: Receiving groove; 72: Flow groove; 8: First drive assembly; 81: First rotating rod; 82: First bevel gear; 83: Second bevel gear; 9: Second spring; 10: Sliding block; 11: First scraper; 12: Blowing plate; 121: Connecting groove; 122: Blowing hole; 13: Air supply pipe; 14: Air supply mechanism; 141: Cover; 142: Rotating shaft; 143: Fan blade; 144: Second drive assembly; 1441: Second rotating rod; 1442: First pulley; 1443: Second pulley; 1444: Belt; 15: Second scraper; 16: Buffer ring; 17: Weight sensor; 18: Solenoid valve; 19: Screw conveyor; 20: Dual-shaft motor; 21: Control box. Detailed Implementation

[0059] The embodiments of this utility model will be further described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this utility model. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0060] Figure 1 This is a schematic diagram of a medium-adding device for a coal preparation plant media storage according to an embodiment of the present invention; Figure 2 for Figure 1 The diagram shows the internal structure of the dielectric addition device. Figure 3 for Figure 2 The diagram shows the connection between the filter screen and the telescopic rod of the media adding device. Figures 1-3As shown, the medium feeding device of the coal preparation plant's medium silo includes a hopper 1, multiple fixed blocks 2, multiple telescopic rods 3, a filter screen 4, multiple first springs 5, and a vibrating motor 6. The hopper 1 has a receiving cavity, with an inlet and an outlet communicating with the receiving cavity; multiple fixed blocks 2 are circumferentially fixedly connected to the inner wall of the hopper 1 at intervals; the fixed end of one telescopic rod 3 is fixedly connected to the end of one fixed block 2 facing the outlet; the filter screen 4 is fixedly connected to the movable end of each telescopic rod 3, and the circumference of the filter screen 4 abuts against the circumferential inner wall of the hopper 1, with filter holes extending through the filter screen 4; one first spring 5 is sleeved on one telescopic rod 3, and the opposite ends of the first spring 5 are fixedly connected to the fixed block 2 and the filter screen 4 respectively; the vibrating motor 6 is fixedly connected to the filter screen 4.

[0061] In use, the discharge port of hopper 1 is connected to the inlet of the downstream screw conveyor 19. The vibration motor 6 is started, and the filter screen 4 vibrates up and down under its drive. Simultaneously, the filter screen 4 causes the telescopic rod 3, which is fixedly connected to it, to extend or retract, stretching or compressing the first spring 5 between the filter screen 4 and the fixed block 2. After being stretched or compressed, the first spring 5 applies an elastic force to the filter screen 4 to restore its deformation. Under the combined action of the vibration motor 6 and the spring force, the filter screen 4 vibrates fully. Medium material is fed into hopper 1 through the inlet. The medium falls onto the filter screen 4 and vibrates with it. During the vibration, medium of suitable particle size (e.g., iron ore) falls through the filter holes on the filter screen 4 and is discharged to the screw conveyor 19 through the outlet. Larger impurities remain on the filter screen 4.

[0062] The medium feeding device of this utility model for coal preparation plant media storage utilizes the combined action of the vibrating motor 6, the fixed block 2, the telescopic rod 3, and the first spring 5 to drive the filter screen 4 to vibrate fully. This allows media with appropriately sized particles to pass smoothly through the filter screen 4, while larger impurities are retained on the filter screen 4. This not only effectively removes impurities from the media but also improves filtration efficiency, reduces clogging, and enhances the quality of subsequent medium feeding.

[0063] like Figures 1-3As shown, in this embodiment, the hopper 1 has a cylindrical upper section and a funnel lower section, with a hollow interior. An inlet is located at the top, and an outlet at the bottom. Four fixing blocks 2 are evenly fixed to the inner wall of the cylindrical section. The lower surface of each fixing block 2 is fixedly connected to the fixed end of a telescopic rod 3, and the movable end of each telescopic rod 3 is fixedly connected to the upper surface of the filter screen 4. A first spring 5 is sleeved on the telescopic rod 3, with its upper end fixedly connected to the lower surface of the fixing block 2 and its lower end fixedly connected to the upper surface of the filter screen 4. The filter screen 4 has multiple sets of filter holes evenly distributed throughout, and its cross-section matches the cross-section of the inner wall of the hopper 1, ensuring that the circumference of the filter screen 4 abuts against the circumference of the inner wall of the hopper 1 without any gaps, preventing unfiltered media from falling below the filter screen 4. A vibration motor 6 is fixed below the filter screen 4. Depending on the actual application, the vibration motor 6 can be any commercially available model that can make the filter screen 4 vibrate fully. The vibration motor 6 is a mature existing technology, and its specific structure and working principle will not be described in detail here. The setting position and specific quantity of the fixing block 2, telescopic rod 3 and the first spring 5 can be matched and adjusted. The telescopic rod 3 is a mature existing technology and can adopt any structural form that can extend and retract with the vibration of the filter screen 4.

[0064] Figure 4 for Figure 2 A schematic diagram showing the connection relationship between the drive shaft of the medium-adding device and the first scraper, the blowing plate, and the second scraper. Figure 5 for Figure 4 A magnified view of a portion of point A in the middle. (See image below.) Figure 4 and Figure 5 As shown, optionally, the medium feeding device of the coal preparation plant's medium silo further includes a drive shaft 7, a first drive assembly 8, a second spring 9, a sliding block 10, and a first scraper 11. The drive shaft 7 passes through the hopper 1 and the filter screen 4, extending into the receiving cavity of the filter screen 4 facing the discharge port. A receiving groove 71 is provided on the side wall of the drive shaft 7, and the receiving groove 71 is located on the side of the filter screen 4 facing the inlet. The first drive assembly 8 is drivenly connected to the drive shaft 7 and is used to drive the drive shaft 7 to rotate. The second spring 9 is disposed in the receiving groove 71, and the first end of the second spring 9 is fixedly connected to the inner wall of the receiving groove 71 away from the filter screen 4. The sliding block 10 is disposed in the receiving groove 71 and is fixedly connected to the second end of the second spring 9. The sliding block 10 can slide in the receiving groove 71 along the extension direction of the drive shaft 7. The first scraper 11 is fixedly connected to the side of the sliding block 10 away from the drive shaft 7 and abuts against the filter screen 4. This configuration allows the first scraper 11 to evenly spread the medium onto the filter screen 4 during its rotation, preventing the filter screen 4 from becoming clogged. This not only improves the efficiency of the screening process and ensures smooth passage of the medium, but also reduces the maintenance requirements of the filter screen 4, extends the service life of the device, and maintains the stability and continuity of the device's operation.

[0065] like Figure 2 and Figure 4 As shown, in this embodiment, the drive shaft 7 is a cylindrical rod that vertically penetrates the hopper 1 and the filter screen 4, extending downwards to the discharge port near the hopper 1, with its upper end protruding outside the hopper 1. At a height close to the upper surface of the filter screen 4, two symmetrical receiving grooves 71 are formed on the outer wall of the drive shaft 7. Correspondingly, two second springs 9, two sliding blocks 10, and two first scrapers 11 are also provided. Figure 4 and Figure 5 As shown, the second spring 9 is vertically arranged, with its lower end fixedly connected to the upper surface of the sliding block 10 arranged in the receiving groove 71, and its upper end fixedly connected to the upper side wall of the receiving groove 71. The first scraper 11 is fixed to the side of the sliding block 10 away from the drive shaft 7. In the initial state, the first scraper 11 abuts against the filter screen 4, and the second spring 9 is in a compressed state. During the vibration of the filter screen 4, when the filter screen 4 vibrates downward, it tends to detach from the first scraper 11. At this time, the second spring 9 loses the external pressure applied by the filter screen 4 and extends under the action of the elastic force generated by the recovery deformation, thereby driving the sliding block 10 and the first scraper 11 directly or indirectly connected to it to move towards the filter screen 4, so that the first scraper 11 remains in contact with the filter screen 4. When the filter screen 4 vibrates upward, it further squeezes the first scraper 11. Therefore, the filter screen 4 and the first scraper 11 always remain in contact. The first drive assembly 8 is activated, driving the transmission shaft 7 to rotate. The rotation of the transmission shaft 7 causes the second spring 9, sliding block 10, and first scraper 11, which are directly or indirectly connected to it, to rotate synchronously. During the rotation of the first scraper 11, the medium falling onto the filter screen 4 is evenly spread. Depending on the actual application, the first drive assembly 8 can adopt any drive structure, as long as it can drive the transmission shaft 7 to rotate. The number of first scrapers 11 can be adjusted, and correspondingly, the number of receiving grooves 71, second springs 9, and sliding blocks 10 can be adjusted accordingly.

[0066] Optionally, the first drive assembly 8 includes a first motor, a first rotating rod 81, a first bevel gear 82, and a second bevel gear 83. The first rotating rod 81 is fixedly connected to the output shaft of the first motor; the first bevel gear 82 is sleeved on the first rotating rod 81 and fixedly connected to it; the second bevel gear 83 is sleeved on one end of the drive shaft 7 that protrudes from the hopper 1 and fixedly connected to it, and the second bevel gear 83 meshes with the first bevel gear 82. This configuration simplifies the structure of the first drive assembly 8, facilitates assembly and operation, and ensures smooth gear transmission, which is beneficial for the long-term stable operation of the device.

[0067] like Figure 2 and Figure 4As shown, in this embodiment, the first motor is located outside the hopper 1. The first rotating rod 81 is perpendicular to the transmission shaft 7. A first bevel gear 82 is fixedly fitted onto one end of the transmission shaft 7, and a second bevel gear 83 is fixedly fitted onto the other end of the transmission shaft 7 facing the first rotating rod 81. The second bevel gear 83 is perpendicular to and meshes with the first bevel gear 82. When the first motor is started, the output shaft of the first motor rotates, driving the first rotating rod 81 and the first bevel gear 82, which are directly or indirectly connected to it, to rotate. The rotation of the first bevel gear 82 drives the second bevel gear 83, which meshes with it, to rotate, ultimately driving the transmission shaft 7, which is connected to the second bevel gear 83, to rotate.

[0068] Optionally, the drive shaft 7 has a flow groove 72 along its extension direction; the medium feeding device of the coal preparation plant's medium silo also includes a blower plate 12, an air supply pipe 13, and an air supply mechanism 14. The blower plate 12 is located on the side of the filter screen 4 facing the discharge port and is fixedly connected to the drive shaft 7. A connecting groove 121 is provided in the blower plate 12, which is connected to the flow groove 72. A plurality of blow holes 122 are spaced apart on the side of the blower plate 12 facing the filter screen 4. Each blow hole 122 is connected to the connecting groove 121, and a one-way valve is installed in each blow hole 122. The first end of the air supply pipe 13 is connected to the flow groove 72 in the end of the drive shaft 7 that is exposed in the hopper 1. The air outlet of the air supply mechanism 14 is connected to the second end of the air supply pipe 13. This setup, by blowing air onto the filter screen 4 through the air blower 12, can use aerodynamics to remove dust and impurities from the filter holes of the filter screen 4, reducing the frequency of manual cleaning, improving the permeability of the filter screen 4, ensuring that the screening process is not obstructed, reducing the maintenance cost of the device, extending the service life of the filter screen 4, and ensuring the efficient operation of the device.

[0069] like Figure 2 and Figure 4As shown, in this embodiment, a flow groove 72 is vertically formed at the center of the drive shaft 7 along the extending direction, and the flow groove 72 extends upward to the upper end of the drive shaft 7 and downward to below the filter screen 4. Three air blowing plates 12 are fixed at equal intervals around the drive shaft 7 below the filter screen 4. Each air blowing plate 12 is a rectangular parallelepiped, horizontally arranged, and each air blowing plate 12 has a horizontally formed connecting groove 121 at its center. One end of the connecting groove 121 extends to the end near the free end of the air blowing plate 12, and the other end extends to communicate with the flow groove 72 inside the drive shaft 7. Multiple air blowing holes 122 are equally spaced on the upper surface of each air blowing plate 12, and the air blowing holes 122 extend downward to communicate with the flow groove 72. One end of the air supply pipe 13 communicates with the flow groove 72 at the upper end of the drive shaft 7 exposed in the hopper 1, and the other end communicates with the air outlet of the air supply mechanism 14. When the filter screen 4 needs cleaning, the air supply mechanism 14 is activated. The air supply mechanism 14 delivers airflow through the air supply pipe 13. The airflow enters the flow groove 72 inside the drive shaft 7 through the air supply pipe 13, and is then conveyed to the connecting groove 121 inside the blower plate 12, which is connected to the flow groove 72. It is further conveyed to each blow hole 122 connected to the connecting groove 121, and finally blown onto the filter screen 4 through the one-way valve in the blow hole 122. The one-way valve ensures that the airflow can be blown onto the filter screen 4 through the blow hole 122, while the medium falling through the filter screen 4 cannot enter the blow hole 122. Depending on the actual application, the number of blower plates 12 and the specific connection position with the drive shaft 7 can be adjusted appropriately. The air supply mechanism 14 can be composed of any structure capable of generating airflow.

[0070] Figure 6 for Figure 2 A schematic diagram of the air supply mechanism of the medium-addition device is shown. Figure 6 As shown, optionally, the air supply mechanism 14 includes a cover 141, a rotating shaft 142, multiple fan blades 143, and a second drive assembly 144. The cover 141 has a receiving cavity and an air outlet communicating with the receiving cavity. Both ends of the rotating shaft 142 pass through the cover 141 and are rotatably connected to it. Multiple fan blades 143 are fixedly connected to the rotating shaft 142 circumferentially at intervals within the receiving cavity. The second drive assembly 144 is driven by the rotating shaft 142 to drive its rotation. This configuration simplifies the structure of the air supply mechanism 14 and facilitates assembly and operation.

[0071] like Figure 6As shown, in this embodiment, the cover 141 is a hollow cylinder with multiple air inlets. The air outlet of the cover 141 is connected to the air supply pipe 13. The rotating shaft 142 passes through the central axis of the cover 141, and its two ends are rotatably connected to the two side walls of the cover 141 by bearings, with at least one end protruding from the cover 141. Multiple fan blades 143 are fixedly connected to the rotating shaft 142 at equal intervals around the circumference inside the cover 141. The end of the rotating shaft 142 protruding from the cover 141 is driven by the second drive assembly 144. When the filter screen 4 needs to be cleaned, the second drive assembly 144 is activated, which drives the rotating shaft 142 to rotate. The rotation of the rotating shaft 142 drives the multiple fan blades 143 to rotate, thereby generating airflow. The airflow enters the air supply pipe 13 connected to the cover 141 and is then transported to the flow groove 72 in the drive shaft 7. Depending on the actual application, the second drive component 144 can be any structure that can drive the rotating shaft 142 to rotate, and the specific shape and size of the cover 141 and the number of fan blades 143 can be matched and adjusted.

[0072] Optionally, the second drive assembly 144 includes a second motor, a second rotating rod 1441, a first pulley 1442, a second pulley 1443, and a belt 1444. The second rotating rod 1441 is fixedly connected to the output shaft of the second motor; the first pulley 1442 is fitted onto the second rotating rod 1441 and fixedly connected to it; the second pulley 1443 is fitted onto one end of the rotating shaft 142 that protrudes from the cover 141 and fixedly connected to it; the belt 1444 is fitted onto the first pulley 1442 and the second pulley 1443 and is drively connected to them. The pulley drive structure is simple, easy to adjust, and runs smoothly, which is beneficial to the long-term stable operation of the entire device.

[0073] As shown in Figure 2 and Figure 6As shown, in this embodiment, the second rotating rod 1441 is horizontally arranged and perpendicular to the transmission shaft 7. The left end of the second rotating rod 1441 is fixedly connected to the output shaft of the second motor. The first pulley 1442 is sleeved and fixed near the right end. The second pulley 1443 is longitudinally spaced a certain distance from the first pulley 1442 and arranged opposite to it. The right end of the rotating shaft 142 is exposed outside the cover 141, and the second pulley 1443 is sleeved and fixed thereon. The belt 1444 is sleeved on the surfaces of the second pulley 1443 and the first pulley 1442 to achieve a transmission connection. When the filter screen 4 needs cleaning, the second motor is started. The output shaft of the second motor rotates, driving the second rotating rod 1441 and the first pulley 1442, which are directly or indirectly connected to it, to rotate. The rotation of the first pulley 1442 drives the belt 1444 to rotate, and the rotation of the belt 1444 drives the second pulley 1443 to rotate. Ultimately, this drives the rotating shaft 142 connected to the second pulley 1443 and the fan blade 143 fixed to the rotating shaft 142 to rotate, thereby generating airflow. Depending on the actual application, the second motor and the first motor can be set independently, or they can be integrated into a dual-axis motor 20. In this embodiment, the second motor and the first motor are integrated into a dual-axis motor 20, such as... Figure 2 As shown, the left output shaft of the dual-axis motor 20 is connected to the first rotating rod 81, and the right output shaft is connected to the second rotating rod 1441.

[0074] Optionally, the medium feeding device in the coal preparation plant's medium silo also includes a second scraper 15. The second scraper 15 is positioned on the side of the filter screen 4 facing the discharge port, fixedly connected to the drive shaft 7, and clearance-fitted with the inner wall of the hopper 1. This arrangement, through the rotation of the second scraper 15, effectively cleans the medium adhering to the inner wall of the hopper 1, preventing the medium from accumulating on the inner wall of the hopper 1, reducing blockages and material accumulation, maintaining normal operation of the device, improving cleaning efficiency, extending the service life of the hopper 1, and ensuring the stability and continuity of the production process.

[0075] like Figure 2 and Figure 4 As shown, in this embodiment, three second scrapers 15 are arranged below the filter screen 4 and are fixedly connected to the drive shaft 7 at circumferential intervals. The second scrapers 15 are irregularly annular, matching the shape of the inner wall of the hopper 1 and maintaining a certain gap with the inner wall of the hopper 1. This ensures that when the drive shaft 7 rotates, causing the second scrapers 15 to rotate accordingly, there will be no interference with the inner wall of the hopper 1, while effectively cleaning the medium adhering to the inner wall of the hopper 1. The number of second scrapers 15 can be adjusted according to the actual application, and the specific structural shape can be adjusted according to the shape of the inner wall of the hopper 1.

[0076] Optionally, the medium feeding device in the coal preparation plant's medium silo also includes a buffer ring 16. The buffer ring 16 is disposed on the side of the filter screen 4 facing the feed inlet. The outer circumferential wall of the buffer ring 16 is circumferentially fixedly connected to the inner circumferential wall of the hopper 1, and the inner wall of the buffer ring 16 is set as an inclined surface. This arrangement allows the medium falling onto the buffer ring 16 to slowly fall onto the filter screen 4 along the inclined surface of the buffer ring 16, avoiding a large amount of medium rapidly impacting the filter screen 4.

[0077] like Figure 2 and Figure 3 As shown, in this embodiment, the buffer ring 16 is disposed above the fixing block 2, and the outer wall size matches the inner wall size of the hopper 1, so that the outer circumferential of the buffer ring 16 and the inner circumferential of the hopper 1 can be tightly attached and fixed. The inner wall of the buffer ring 16 is set as an inclined surface that is inclined toward the center of the filter screen 4, and the specific inclination angle of the inclined surface can be adjusted appropriately as needed.

[0078] Figure 7 for Figure 2 A schematic diagram of the bottom of the hopper of the medium-adding device shown. Figure 2 and Figure 7 As shown, optionally, the medium feeding device in the coal preparation plant's medium silo also includes a weight sensor 17, a solenoid valve 18, and a controller. The weight sensor 17 is located in the receiving cavity of the filter screen 4 facing the discharge port and is used to monitor the weight of the medium. The solenoid valve 18 is installed inside the discharge port. The input terminal of the controller is communicatively connected to the output terminal of the weight sensor 17, and the output terminal of the controller is communicatively connected to the control terminal of the solenoid valve 18. With this configuration, when the medium that has been filtered by the filter screen 4 and falls to the bottom of the hopper 1 reaches a certain weight, the controller can open the solenoid valve 18 to automatically discharge the medium, eliminating the need for personnel to judge the timing of discharge from the hopper 1.

[0079] like Figure 2 and Figure 7 As shown, in this embodiment, a solenoid valve 18 is installed at the discharge port of hopper 1. A weight sensor 17 is fixedly installed on the top of the solenoid valve 18. The weight sensor 17 monitors the actual weight of the medium below the filter screen 4 in real time and transmits the actual weight data to the controller in real time. The controller has a preset weight stored inside and compares the actual weight data of the medium with the preset weight. When the actual weight data of the medium is greater than the preset weight, the controller controls the solenoid valve 18 to open, and the medium in hopper 1 is discharged through the discharge port and enters the downstream screw conveyor 19. The control logic of the controller controlling the opening of the solenoid valve 18 according to the actual weight data of the medium can be implemented according to existing mature algorithms, and its specific working principle will not be described in detail here.

[0080] Figure 8 for Figure 1 The diagram shows the connection between the medium-adding device and the screw conveyor. Figure 8As shown, this utility model also provides a medium feeding system for a coal preparation plant medium silo, including a screw conveyor 19, and a medium feeding device for a coal preparation plant medium silo as described in any of the above embodiments. The discharge port of the hopper 1 of the medium feeding device for the coal preparation plant medium silo is connected to the inlet of the screw conveyor 19.

[0081] The medium feeding system of the coal preparation plant medium silo of this utility model utilizes the combined action of the vibrating motor 6, the fixed block 2, the telescopic rod 3 and the first spring 5 to drive the filter screen 4 to vibrate fully. This allows medium with appropriately sized particles to pass smoothly through the filter screen 4, while larger impurities are retained on the filter screen 4. This not only effectively removes impurities from the medium, but also improves filtration efficiency, reduces clogging, and improves the quality of subsequent medium feeding.

[0082] like Figure 8 As shown, in this embodiment, a feed inlet is provided on the upper side wall of the screw conveyor 19. The medium-adding device is mounted above the screw conveyor 19 with the aid of a bracket, and the discharge port of the hopper 1 is connected to the feed inlet of the screw conveyor 19. A control box 21 is also provided on the outer wall of the screw conveyor 19, which can uniformly control the operation of the medium-adding system. Both the screw conveyor 19 and the control box 21 are mature technologies and conventional designs in the prior art, and their internal structure, connection method and principle will not be described here.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A medium adding device of a medium store of a coal preparation plant, characterized in that, include: The hopper has a receiving cavity inside, and the hopper has an inlet and an outlet that communicate with the receiving cavity; Multiple fixing blocks are fixedly connected to the inner wall of the hopper at circumferential intervals. Multiple telescopic rods, with one fixed end of the telescopic rod being fixedly connected to one end of the fixed block facing the discharge port; A filter screen is fixedly connected to the movable end of each of the telescopic rods. The filter screen circumferentially abuts against the inner wall of the hopper. The filter screen has filter holes that extend through it. Multiple first springs, one first spring sleeved on one telescopic rod, and the opposite ends of the first springs are respectively fixedly connected to the fixed block and the filter screen; A vibration motor is fixedly connected to the filter screen.

2. The medium charging device of the coal preparation plant medium storage according to claim 1, characterized in that, Also includes: A drive shaft passes through the hopper and the filter screen, extending into the receiving cavity on the side of the filter screen facing the discharge port. A receiving groove is provided on the side wall of the drive shaft, and the receiving groove is located on the side of the filter screen facing the inlet. A first drive assembly is connected to the drive shaft and is used to drive the drive shaft to rotate. A second spring is disposed in the receiving groove, and the first end of the second spring is fixedly connected to the inner wall of the receiving groove on the side away from the filter screen. A sliding block is disposed in the receiving groove and fixedly connected to the second end of the second spring. The sliding block can slide in the receiving groove along the extension direction of the transmission shaft. The first scraper is fixedly connected to the side of the sliding block away from the drive shaft and abuts against the filter screen.

3. The medium charging device of the coal preparation plant medium storage according to claim 2, characterized in that, The first driving component includes: First motor; The first rotating rod is fixedly connected to the output shaft of the first motor; A first bevel gear is sleeved on the first rotating rod and is fixedly connected to the first rotating rod; The second bevel gear is sleeved on the end of the drive shaft that protrudes from the hopper and is fixedly connected to the drive shaft. The second bevel gear meshes with the first bevel gear.

4. The medium-adding device for the medium silo of a coal preparation plant according to claim 2 or 3, characterized in that: The drive shaft has a flow groove along its extension direction; The medium feeding device in the coal preparation plant's media silo also includes: A blower plate is provided on the side of the filter screen facing the discharge port and is fixedly connected to the drive shaft. A connecting groove is provided in the blower plate and the connecting groove is connected to the flow groove. A plurality of blow holes are provided at intervals on the side of the blower plate facing the filter screen. Each blow hole is connected to the connecting groove and a one-way valve is installed in each blow hole. An air supply pipe, the first end of which is connected to the flow groove inside the end of the drive shaft that protrudes from the hopper; An air supply mechanism, wherein the air outlet of the air supply mechanism is connected to the second end of the air supply pipe.

5. The medium charging device of the coal preparation plant medium bin according to claim 4, characterized in that, The air supply mechanism includes: The cover has a cavity inside and an air outlet communicating with the cavity. A rotating shaft, the two ends of which pass through the cover and are rotatably connected to the cover; Multiple fan blades, wherein the multiple fan blades are fixedly connected to the rotating shaft at circumferential intervals within the accommodating cavity; The second drive component is connected to the rotating shaft and is used to drive the rotating shaft to rotate.

6. The medium-adding device for the medium silo of a coal preparation plant according to claim 5, characterized in that, The second driving component includes: Second motor; The second rotating rod is fixedly connected to the output shaft of the second motor; A first pulley, on which the second rotating rod is sleeved and fixedly connected; The second pulley is fitted onto one end of the rotating shaft that protrudes from the cover and is fixedly connected to the rotating shaft; A belt, which is fitted onto the first pulley and the second pulley and is connected to the first pulley and the second pulley in a driving connection.

7. The medium-adding device for the medium silo of a coal preparation plant according to claim 2 or 3, characterized in that, Also includes: The second scraper is disposed on the side of the filter screen facing the discharge port, fixedly connected to the drive shaft, and in clearance fit with the inner wall of the hopper.

8. The medium charging device of the coal preparation plant medium storage according to any one of claims 1-3, characterized in that, Also includes: A buffer ring is disposed on the side of the filter screen facing the feed inlet. The outer circumferential wall of the buffer ring is fixedly connected to the inner circumferential wall of the hopper, and the inner wall of the buffer ring is set as an inclined surface.

9. The medium charging device of the coal preparation plant medium storage according to any one of claims 1-3, characterized in that, Also includes: A weight sensor is disposed in the receiving cavity on the side of the filter screen facing the discharge port, for monitoring the weight of the medium; A solenoid valve, wherein the solenoid valve is installed inside the discharge port; The controller has its input terminal communicatively connected to the output terminal of the weight sensor, and its output terminal communicatively connected to the control terminal of the solenoid valve.

10. A medium charging system of a coal preparation plant medium storage, comprising a screw conveyor, characterized in that, It also includes a medium-adding device for a coal preparation plant medium silo as described in any one of claims 1-9, wherein the discharge port of the hopper of the medium-adding device for the coal preparation plant medium silo is connected to the inlet of the screw conveyor.

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