Vibrating screening treatment device for coal dressing

Abstract

The utility model belongs to the technical field of vibration screening for coal dressing, and particularly relates to a vibration screening treatment device for coal dressing, which comprises a working box, a screening cavity is arranged in the working box, two rotating frames are rotatably mounted in the screening cavity, one rotating frame is positioned above the other rotating frame, a clamping groove is arranged in each rotating frame, and the other rotating frame is positioned above the clamping groove. A screen is slidably mounted in the clamping groove, a sliding groove is formed in the portion, located on one side of the screen, in the rotating frame, a limiting plate is slidably mounted in the sliding groove and located on one side of the screen, and material guiding blocks are fixedly mounted on the portions, located on the two sides of the screen, of the top of the rotating frame; the two limiting assemblies are located in the two rotating frames correspondingly and used for limiting the two limiting plates correspondingly. The coal mine multi-stage screening device can achieve the effect of conducting multi-stage screening on a coal mine, it is ensured that personnel can conduct multi-stage screening and collecting on the coal mine conveniently, and when the screen is damaged after being used for a long time, the personnel can replace the screen conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration screening for coal preparation, in particular to a vibration screening processing device for coal preparation. Background Art

[0002] In the coal preparation process, vibration screening is usually used in the pre-processing of raw coal. By feeding the raw coal into the vibrating screen, materials of different particle sizes are separated under the action of vibration. Smaller particles fall through the screen holes, while larger particles are retained on the screen surface.

[0003] Common coal screening devices can only screen small particles of coal in the coal, and the screened small particles of coal will still contain fine coal particles, causing small particles of coal and fine coal particles to mix together, which will cause personnel to screen again in subsequent use. In addition, when putting coal into the screening machine, the coal will fall and cause damage to the screen, and long-term use will easily cause the screen to be damaged. In view of this, we propose a vibration screening device for coal preparation. Utility Model Content

[0004] The utility model aims to provide a vibration screening processing device for coal preparation to solve the problems raised in the above-mentioned background technology.

[0005] In view of this, the utility model provides a vibration screening processing device for coal preparation, comprising:

[0006] A working box, wherein a screening chamber is provided in the working box, wherein two rotating frames are rotatably installed in the screening chamber, and one of the rotating frames is located above the other rotating frame, wherein a card slot is provided in the rotating frame, wherein a screen is slidably installed in the card slot, wherein a sliding slot is provided in the rotating frame and located on one side of the screen, wherein a limit plate is slidably installed in the sliding slot and located on one side of the screen, and guide blocks are fixedly installed on the top of the rotating frame and on both sides of the screen;

[0007] Two limiting components, the two limiting components are respectively located in the two rotating frames and are used to limit the two limiting plates respectively;

[0008] Two elliptical blocks, both of which are rotatably mounted on one side of the inner wall of the screening chamber, and the two elliptical blocks are respectively located at the bottom of two rotating frames;

[0009] A power assembly, which is located on the working box and is used to drive the two elliptical blocks to rotate;

[0010] Two discharge plates 1 are fixedly installed on both sides of the working box respectively, and the two discharge plates 1 are respectively located at the bottom of the two rotating frames, a buffer pad is fixedly installed on one side of the discharge plate 1 close to the working box and located at the bottom of the rotating frame, a discharge trough is opened in the working box and at the bottom of the screening cavity, and a discharge plate 2 is fixedly installed on the front side of the working box and at the outlet of the discharge trough.

[0011] In the technical scheme, a power assembly is set up to drive the power assembly, and the power assembly drives the two elliptical blocks to rotate. The rotation of the elliptical blocks will repeatedly squeeze the rotating frame to rotate. One end of the rotating frame will repeatedly rotate up and down in the screening chamber. The rotating frame will drive the screen to repeatedly rotate up and down in the screening chamber. At the same time, the bottom of one end of the rotating frame will repeatedly hit the buffer pad. Under the buffering effect of the buffer pad, it can ensure that the impact force on the rotating frame is reduced. Then the personnel can put the coal that needs to be screened into the feed hopper, and then the coal will fall on the top of one of the screens. Under the action of repeated up and down rotation and vibration of one of the screens, the coal Small and medium-sized coal particles will fall onto another screen through several mesh holes on one of the screens. The remaining coal on one of the screens will be discharged from one of the discharging plates 1 under the action of gravity. Under the action of repeated up and down rotation and vibration of the other screen, the fine coal particles in the coal will fall into the discharging trough through several mesh holes on the other screen. The remaining small coal particles on the other screen will be discharged from another discharging plate 1 under the action of gravity. The fine coal particles in the discharging trough will be discharged from the discharging plate 2, thereby achieving the effect of multi-stage screening of coal, ensuring that it is convenient for personnel to conduct multi-stage screening and collection of coal;

[0012] Through the set limit assembly, the limit assembly can release the limit on the limit plate, and then under the action of gravity, the limit plate will slide downward in the sliding groove. When the top of the limit plate is lower than the bottom of the screen, the personnel can pull the screen out of the slot and replace it, and then move the limit plate upward until the top of the limit plate is flush with the top of the screen. The limit plate can then be limited by the limit assembly to ensure that when the screen is damaged after long-term use, it is convenient for personnel to replace the screen.

[0013] In the above technical solution, further, the limit assembly includes:

[0014] Two bolts are symmetrically threadedly installed on one side of the rotating frame, and one end of the two bolts extends into the limiting plate, and the bolts are threadedly connected to the limiting plate.

[0015] In the present technical solution, when the screen is damaged after long-term use, personnel can use tools to turn the two bolts separately. Under the action of the threads, the bolts will rotate and move outward in the limit plate and the rotating frame. When one end of the two bolts moves out of the limit plate, the two bolts can release the limit on the limit plate. Then, under the action of gravity, the limit plate will slide downward in the sliding groove. When the top of the limit plate is lower than the bottom of the screen, personnel can pull the screen out of the slot and replace it, and then move the limit plate upward until the top of the limit plate is flush with the top of the screen. The two bolts can be turned. Under the action of the threads, one end of the two bolts will enter the limit plate and limit the limit plate, ensuring that when the screen is damaged after long-term use, it is convenient for personnel to replace the screen.

[0016] In the above technical solution, further, the power assembly includes:

[0017] An L-shaped plate, the L-shaped plate is fixedly mounted on the rear side of the working box, a motor is fixedly mounted on the side of the L-shaped plate away from the working box, the output end of the motor passes through the L-shaped plate and the rear side of the working box, extends into the screening cavity and is fixed to one of the elliptical blocks, a transmission wheel 1 is fixedly mounted on the output shaft of the motor and is located between the working box and the L-shaped plate, a transmission wheel 2 is rotatably mounted on the rear side of the working box and above the transmission wheel 1, a belt is installed for transmission between the transmission wheel 1 and the transmission wheel 2, one end of the transmission wheel 2 passes through the rear side of the working box, extends into the screening cavity and is fixed to the other elliptical block.

[0018] In the technical solution, the motor is started, and the output shaft of the motor rotates to drive the transmission wheel 1 to rotate, and the rotation of the transmission wheel 1 drives the belt transmission. Under the action of the belt transmission, the belt drives the transmission wheel 2 to rotate, and the rotation of the transmission wheel 1 and the transmission wheel 2 respectively drives the two elliptical blocks to rotate. The rotation of the elliptical blocks will repeatedly squeeze the rotating frame to rotate, and one end of the rotating frame will repeatedly rotate up and down in the screening chamber, and the rotating frame will drive the screen to repeatedly rotate up and down in the screening chamber. At the same time, the bottom of one end of the rotating frame will repeatedly hit the buffer pad. Under the buffering effect of the buffer pad, it can ensure that the impact force on the rotating frame is reduced, and then the personnel can put the coal that needs to be screened into the feed hopper, and then the coal will fall on one of the screens. At the top, under the action of repeated up and down rotation and vibration of one of the screens, small particles of coal in the coal will pass through several mesh holes on one of the screens and fall onto the other screen, and the remaining coal on one of the screens will be discharged from one of the discharging plates one under the action of gravity, and under the action of repeated up and down rotation and vibration of the other screen, the fine coal particles in the coal will pass through several mesh holes on the other screen and fall into the discharging trough under the action of gravity, and the remaining small particles of coal on the other screen will be discharged from the other discharging plate one, and the fine coal particles in the discharging trough will be discharged from the discharging plate two, thereby achieving the effect of multi-stage screening of coal, ensuring that it is convenient for personnel to conduct multi-stage screening and collection of coal.

[0019] In the above technical solution, further, the output shaft of the motor is rotatably connected to the L-shaped plate and the working box.

[0020] In this technical solution, it is ensured that the output end of the motor can rotate normally in the transmission wheel 1 and the working box.

[0021] In the above technical solution, further, a feed hopper is fixedly installed on the top of the working box.

[0022] In this technical solution, personnel can put coal into the screening chamber through the feed hopper.

[0023] In the above technical solution, further, the mesh diameter of one of the sieves is larger than the mesh diameter of the other sieve, and one of the sieves is located above the other sieve.

[0024] In this technical solution, it is ensured that the two screens can perform graded screening on the coal mines and that the structures of the two screens are stable.

[0025] In the above technical solution, further, the two rotating frames are both inclined structures, and the inclination angles of the two rotating frames are opposite.

[0026] In this technical solution, the structural stability of the two rotating frames is ensured.

[0027] The beneficial effects of the utility model are:

[0028] 1. The vibration screening device for coal preparation drives the power assembly through the power assembly set, and the power assembly drives the two elliptical blocks to rotate. The rotation of the elliptical blocks will repeatedly squeeze the rotating frame to rotate. One end of the rotating frame will repeatedly rotate up and down in the screening chamber. The rotating frame will drive the screen to repeatedly rotate up and down in the screening chamber. At the same time, the bottom of one end of the rotating frame will repeatedly hit the buffer pad. Under the buffering effect of the buffer pad, it can ensure that the impact force on the rotating frame is reduced. Then the personnel can put the coal that needs to be screened into the feed hopper, and then the coal will fall on the top of one of the screens. Under the action of repeated up and down rotation and vibration of one of the screens The small and medium particles of coal in the coal mine will fall onto the other screen through several mesh holes on one of the screens. The remaining coal on one of the screens will be discharged from one of the discharging plates one under the action of gravity. Under the action of repeated up and down rotation and vibration of the other screen, the fine coal particles in the coal mine will pass through several mesh holes on the other screen and fall into the discharging trough. The remaining small particles of coal on the other screen will be discharged from the other discharging plate one under the action of gravity, and the fine coal particles in the discharging trough will be discharged from the discharging plate two, thereby achieving the effect of multi-stage screening of coal mines, ensuring that it is convenient for personnel to conduct multi-stage screening and collection of coal mines.

[0029] 2. The vibration screening processing device for coal preparation can release the limit of the limit plate through the set limit assembly, and then the limit plate will slide downward in the sliding groove under the action of gravity. When the top of the limit plate is lower than the bottom of the screen, the personnel can pull the screen out of the slot and replace it, and then move the limit plate upward until the top of the limit plate is flush with the top of the screen, and then the limit plate can be limited by the limit assembly to ensure that when the screen is damaged after long-term use, it is convenient for personnel to replace the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is one of the overall structural diagrams of the utility model;

[0031] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0032] Figure 3 It is a schematic diagram of the detailed internal structure of the working box in the utility model;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of the working box in the utility model;

[0034] Figure 5 It is a schematic diagram of the regional structure of the rotating frame in the utility model;

[0035] Figure 6This is a schematic diagram of the structure of the screen explosion in the utility model;

[0036] Figure 7 It is a schematic diagram of the regional structure of the motor in the utility model;

[0037] Figure 8 It is a schematic diagram of the regional structure of the working box in the utility model.

[0038] The symbols in the figure are:

[0039] 1. Working box; 2. Screening chamber; 3. Rotating frame; 4. Card slot; 5. Screen; 6. Sliding slot; 7. Limiting plate; 8. Bolt; 9. Guide block; 10. Discharge plate 1; 11. Oval block; 12. L-shaped plate; 13. Motor; 14. Drive wheel 1; 15. Drive wheel 2; 16. Belt; 17. Buffer pad; 18. Discharge chute; 19. Discharge plate 2; 20. Feed hopper. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0043] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0044] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0045] Embodiment 1:

[0046] See also Figure 1 - Figure 8 As shown, this embodiment provides a vibration screening processing device for coal preparation, comprising:

[0047] A working box 1, a screening chamber 2 is provided in the working box 1, two rotating frames 3 are rotatably installed in the screening chamber 2, and one of the rotating frames 3 is located above the other rotating frame 3, a card slot 4 is provided in the rotating frame 3, a screen 5 is slidably installed in the card slot 4, a sliding slot 6 is provided in the rotating frame 3 and located on one side of the screen 5, a limit plate 7 is slidably installed in the sliding slot 6 and located on one side of the screen 5, and a guide block 9 is fixedly installed on the top of the rotating frame 3 and on both sides of the screen 5;

[0048] Two limiting components, the two limiting components are respectively located in the two rotating frames 3 and are used to limit the two limiting plates 7 respectively;

[0049] Two elliptical blocks 11, both elliptical blocks 11 are rotatably mounted on one side of the inner wall of the screening chamber 2, and the two elliptical blocks 11 are respectively located at the bottom of the two rotating frames 3;

[0050] A power assembly, which is located on the working box 1 and is used to drive the two elliptical blocks 11 to rotate;

[0051] Two discharge plates 10 are fixedly installed on both sides of the working box 1 respectively, and the two discharge plates 10 are respectively located at the bottom of the two rotating frames 3. A buffer pad 17 is fixedly installed on one side of the discharge plate 10 close to the working box 1 and located at the bottom of the rotating frame 3. A discharge trough 18 is opened in the working box 1 and at the bottom of the screening chamber 2. A discharge plate 2 19 is fixedly installed on the front side of the working box 1 and at the outlet of the discharge trough 18.

[0052] Among them, the power assembly is driven by the power assembly, and the power assembly drives the two elliptical blocks 11 to rotate. The rotation of the elliptical blocks 11 will repeatedly squeeze the rotating frame 3 to rotate, and one end of the rotating frame 3 will repeatedly rotate up and down in the screening chamber 2. The rotating frame 3 will drive the screen 5 to repeatedly rotate up and down in the screening chamber 2. At the same time, the bottom of one end of the rotating frame 3 will repeatedly hit the buffer pad 17. The buffering effect of the buffer pad 17 can ensure that the impact force on the rotating frame 3 is reduced. Then, the personnel can put the coal that needs to be screened into the feed hopper 20, and then the coal will fall on the top of one of the screens 5. Under the action of repeated up and down rotation and vibration of one of the screens 5, the coal in the coal Small particles of coal will fall onto another sieve 5 through several mesh holes on one of the sieves 5. The remaining coal on one of the sieves 5 will be discharged from one of the discharging plates 10 under the action of gravity. Under the action of repeated up and down rotation and vibration of the other sieve 5, the fine coal particles in the coal will fall into the discharging trough 18 through several mesh holes on the other sieve 5. The remaining small particles of coal on the other sieve 5 will be discharged from another discharging plate 10 under the action of gravity. The fine coal particles in the discharging trough 18 will be discharged from the discharging plate 2 19, thereby achieving the effect of multi-stage screening of coal, ensuring that it is convenient for personnel to perform multi-stage screening and collection of coal;

[0053] Through the set limit assembly, the limit assembly can release the limit plate 7, and then under the action of gravity, the limit plate 7 will slide downward in the sliding groove 6. When the top of the limit plate 7 is lower than the bottom of the screen 5, the personnel can pull the screen 5 out of the slot 4 and replace it, and then move the limit plate 7 upward until the top of the limit plate 7 is flush with the top of the screen 5. The limit plate 7 can be limited by the limit assembly to ensure that when the screen 5 is damaged after long-term use, it is convenient for personnel to replace the screen 5.

[0054] Embodiment 2:

[0055] This embodiment provides a vibrating screening device for coal preparation, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the limit assembly includes:

[0056] Two bolts 8 are symmetrically threadedly installed on one side of the rotating frame 3 , and one end of the two bolts 8 extends into the limiting plate 7 , and the bolts 8 are threadedly connected to the limiting plate 7 .

[0057] When the screen 5 is damaged after long-term use, the personnel can use a tool to rotate the two bolts 8 respectively. Under the action of the thread, the bolts 8 will rotate and move outward in the limit plate 7 and the rotating frame 3. When one end of the two bolts 8 is moved out of the limit plate 7, the two bolts 8 can release the limit plate 7. Then, under the action of gravity, the limit plate 7 will slide downward in the sliding groove 6. When the top of the limit plate 7 is lower than the bottom of the screen 5, the personnel can pull the screen 5 out of the slot 4 and replace it, and then move the limit plate 7 upward until the top of the limit plate 7 is flush with the top of the screen 5. The two bolts 8 can be rotated. Under the action of the thread, one end of the two bolts 8 will enter the limit plate 7 and limit the limit plate 7, ensuring that when the screen 5 is damaged after long-term use, it is convenient for personnel to replace the screen 5.

[0058] Embodiment 3:

[0059] This embodiment provides a vibration screening device for coal preparation, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the power assembly includes:

[0060] An L-shaped plate 12 is fixedly mounted on the rear side of the working box 1, a motor 13 is fixedly mounted on the side of the L-shaped plate 12 away from the working box 1, an output end of the motor 13 passes through the L-shaped plate 12 and the rear side of the working box 1, extends into the screening chamber 2 and is fixed to one of the elliptical blocks 11, a transmission wheel 14 is fixedly mounted on the output shaft of the motor 13 and is located between the working box 1 and the L-shaped plate 12, a transmission wheel 2 15 is rotatably mounted on the rear side of the working box 1 and above the transmission wheel 1 14, a belt 16 is installed for transmission between the transmission wheel 14 and the transmission wheel 2 15, one end of the transmission wheel 2 15 passes through the rear side of the working box 1, extends into the screening chamber 2 and is fixed to the other elliptical block 11.

[0061] Among them, the motor 13 is started, and the output shaft of the motor 13 rotates to drive the transmission wheel 14 to rotate, and the rotation of the transmission wheel 14 drives the belt 16 to drive. Under the action of the belt 16, the belt 16 drives the transmission wheel 2 15 to rotate, and the rotation of the transmission wheel 14 and the transmission wheel 2 15 respectively drives the two elliptical blocks 11 to rotate. The rotation of the elliptical block 11 will repeatedly squeeze the rotating frame 3 to rotate, and one end of the rotating frame 3 will repeatedly rotate up and down in the screening chamber 2. The rotating frame 3 will drive the screen 5 to repeatedly rotate up and down in the screening chamber 2. At the same time, the bottom of one end of the rotating frame 3 will repeatedly hit the buffer pad 17. The buffering effect of the buffer pad 17 can ensure that the impact force on the rotating frame 3 is reduced, and then the personnel can put the coal that needs to be screened into the feed hopper 20, and then the coal will fall At the top of one of the screens 5, under the action of repeated up and down rotation and vibration of one of the screens 5, small particles of coal in the coal will pass through several mesh holes on one of the screens 5 and fall onto the other screen 5, and the remaining coal on one of the screens 5 will be discharged from one of the discharge plates 10 under the action of gravity, and under the action of repeated up and down rotation and vibration of the other screen 5, the fine coal particles in the coal will pass through several mesh holes on the other screen 5 and fall into the discharge trough 18, and the remaining small particles of coal on the other screen 5 will be discharged from the other discharge plate 10 under the action of gravity, and the fine coal particles in the discharge trough 18 will be discharged from the discharge plate 2 19, thereby achieving the effect of multi-stage screening of coal, ensuring that it is convenient for personnel to perform multi-stage screening and collection of coal.

[0062] Embodiment 4:

[0063] This embodiment provides a vibration screening processing device for coal preparation. In addition to the technical solutions of the above embodiments, it also has the following technical features: the output shaft of the motor 13 is rotatably connected to the L-shaped plate 12 and the working box 1.

[0064] Here, it is ensured that the output end of the motor 13 can rotate normally in the transmission wheel 14 and the working box 1.

[0065] Embodiment 5:

[0066] This embodiment provides a vibration screening processing device for coal preparation. In addition to the technical solutions of the above embodiments, it also has the following technical features: a feed hopper 20 is fixedly installed on the top of the working box 1.

[0067] Among them, personnel can put coal into the screening chamber 2 through the feed hopper 20.

[0068] Embodiment 6:

[0069] This embodiment provides a vibrating screening processing device for coal preparation. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features, wherein the mesh diameter on one screen 5 is larger than the mesh diameter on another screen 5, and one screen 5 is located above the other screen 5.

[0070] Among them, it is ensured that the two screens 5 can perform graded screening on the coal mine and the structural stability of the two screens 5 is ensured.

[0071] Embodiment 7:

[0072] This embodiment provides a vibration screening processing device for coal preparation, which, in addition to the technical solutions of the above embodiments, also has the following technical features: both rotating frames 3 are inclined structures, and the inclination angles of the two rotating frames 3 are opposite.

[0073] In this case, the structural stability of the two rotating frames 3 is ensured.

[0074] It is worth noting that when the overall device is in use, when the two rotating frames 3 are flush with the top surface of the working box 1, the discharge end of the rotating frame 3 is located directly above the discharge plate 10, ensuring that the coal on the rotating frame 3 will not enter the screening chamber 2 from the bottom of the rotating frame 3.

[0075] Working principle: when in use, first start the motor 13, the output shaft of the motor 13 rotates to drive the transmission wheel 14, the transmission wheel 14 rotates to drive the belt 16, under the action of the belt 16, the belt 16 drives the transmission wheel 2 15 to rotate, the transmission wheel 14 and the transmission wheel 2 15 rotate to respectively drive the two elliptical blocks 11 to rotate, the rotation of the elliptical block 11 will repeatedly squeeze the rotating frame 3 to rotate, one end of the rotating frame 3 repeatedly rotates up and down in the screening chamber 2, the rotating frame 3 will drive the screen 5 to repeatedly rotate up and down in the screening chamber 2, and at the same time, the bottom of one end of the rotating frame 3 will repeatedly hit the buffer pad 17, under the buffering effect of the buffer pad 17, it can ensure that the impact force on the rotating frame 3 is reduced, and then the personnel can put the coal that needs to be screened into the feed hopper 20, and then the coal The ore will fall on the top of one of the screens 5. Under the action of repeated up and down rotation and vibration of one of the screens 5, small particles of coal in the coal will pass through several mesh holes on one of the screens 5 and fall onto another screen 5. The remaining coal on one of the screens 5 will be discharged from one of the discharging plates 10 under the action of gravity. Under the action of repeated up and down rotation and vibration of the other screen 5, the fine coal particles in the coal will pass through several mesh holes on the other screen 5 and fall into the discharging trough 18. The remaining small particles of coal on the other screen 5 will be discharged from another discharging plate 10 under the action of gravity. The fine coal particles in the discharging trough 18 will be discharged from the discharging plate 2 19, thereby achieving the effect of multi-stage screening of the coal, ensuring that it is convenient for personnel to perform multi-stage screening and collection of the coal;

[0076] The two bolts 8 can be rotated, and one end of the two bolts 8 can enter the limiting plate 7 and limit the limiting plate 7 under the action of the thread, ensuring that when the screen 5 is damaged after long-term use, it is convenient for personnel to replace the screen 5.

[0077] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A vibrating screening device for coal preparation, characterized in that: include: A working box (1), wherein a screening chamber (2) is provided in the working box (1), wherein two rotating frames (3) are rotatably installed in the screening chamber (2), and one of the rotating frames (3) is located above the other rotating frame (3), wherein a slot (4) is provided in the rotating frame (3), wherein a screen (5) is slidably installed in the slot (4), wherein a sliding slot (6) is provided in the rotating frame (3) and located on one side of the screen (5), wherein a limiting plate (7) is slidably installed in the sliding slot (6) and located on one side of the screen (5), and guide blocks (9) are fixedly installed on the top of the rotating frame (3) and located on both sides of the screen (5); Two limiting assemblies, the two limiting assemblies are respectively located in the two rotating frames (3) and are used to limit the two limiting plates (7) respectively; Two elliptical blocks (11), both of which are rotatably mounted on one side of the inner wall of the screening chamber (2), and the two elliptical blocks (11) are respectively located at the bottom of the two rotating frames (3); A power assembly, the power assembly is located on the working box (1) and is used to drive the two elliptical blocks (11) to rotate; Two discharge plates (10) are fixedly mounted on both sides of the working box (1) and are located at the bottom of two rotating frames (3). A buffer pad (17) is fixedly mounted on the discharge plate (10) at one side close to the working box (1) and located at the bottom of the rotating frame (3). A discharge trough (18) is provided in the working box (1) and located at the bottom of the screening chamber (2). A discharge plate (19) is fixedly mounted on the front side of the working box (1) and located at the outlet of the discharge trough (18).

2. A vibration screening device for coal preparation according to claim 1, characterized in that: The limiting component comprises: Two bolts (8) are symmetrically threadedly mounted on one side of the rotating frame (3), and one end of the two bolts (8) extends into the limiting plate (7), and the bolts (8) are threadedly connected to the limiting plate (7).

3. A vibration screening device for coal preparation according to claim 1, characterized in that: The power assembly comprises: An L-shaped plate (12) is fixedly mounted on the rear side of the working box (1); a motor (13) is fixedly mounted on the side of the L-shaped plate (12) away from the working box (1); an output end of the motor (13) passes through the L-shaped plate (12) and the rear side of the working box (1), extends into the screening chamber (2) and is fixed to one of the elliptical blocks (11); a transmission wheel 1 (14) is fixedly mounted on the output shaft of the motor (13) and located between the working box (1) and the L-shaped plate (12); a transmission wheel 2 (15) is rotatably mounted on the rear side of the working box (1) and located above the transmission wheel 1 (14); a belt (16) is installed between the transmission wheel 1 (14) and the transmission wheel 2 (15) for transmission; one end of the transmission wheel 2 (15) passes through the rear side of the working box (1), extends into the screening chamber (2) and is fixed to the other elliptical block (11).

4. A vibrating screening device for coal preparation according to claim 3, characterized in that: The output shaft of the motor (13) is rotatably connected to the L-shaped plate (12) and the working box (1).

5. The vibration screening device for coal preparation according to claim 1, characterized in that: A feed hopper (20) is fixedly mounted on the top of the working box (1).

6. A vibration screening device for coal preparation according to claim 1, characterized in that: The mesh diameter of one of the sieves (5) is larger than the mesh diameter of the other sieve (5), and one of the sieves (5) is located above the other sieve (5).

7. A vibration screening device for coal preparation according to claim 1, characterized in that: The two rotating frames (3) are both inclined structures, and the inclination angles of the two rotating frames (3) are opposite.

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