Coal powder screening and crushing device

Abstract

The present application relates to the technical fields of coal powder screening, and especially relates to a coal powder screening and crushing device, which comprises a supporting mechanism, a scraping mechanism and a screening mechanism, wherein the supporting mechanism comprises a supporting base and a bearing seat; the scraping mechanism comprises a driving motor arranged on the supporting base, a rotating shaft arranged on the driving motor, an edge cover plate arranged on the rotating shaft, and an inner scraping rod and an outer scraping plate arranged on the edge cover plate; the screening mechanism comprises a fixed disc arranged on the driving motor, an outer screening member arranged on the fixed disc, a feeding hopper arranged on the outer screening member, and an inner screening member arranged on the fixed disc; the inner scraping rod can scatter the coal powder in the inner screening member, and the outer scraping plate can roll and push the coal powder and transport the coal powder which is difficult to be screened back to the inner screening member to be scattered and screened again, so that the screening efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal powder screening technology, and in particular to a coal powder screening and pulverizing device. Background Technology

[0002] In the coal conveying system of a power plant, before the fuel enters the main building coal conveying corridor from the coal crusher room via belt, it needs to be screened by a screening device to screen the coal powder. By screening out particles of appropriate diameter, the utilization rate of coal powder in the thermal power plant is improved.

[0003] During the coal powder screening process, large or clump-forming coal powder is difficult to pass through the screening device, and the accumulation of coal material can easily affect the screening efficiency and reduce the screening effect. Therefore, a coal powder screening and crushing device is proposed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems in the above-mentioned or existing technologies where large or agglomerated coal powder is difficult to pass through the screening device, and the accumulation of coal material can easily affect the screening efficiency, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a coal powder screening and pulverizing device.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a coal powder screening and crushing device, comprising: a support mechanism, which includes a support base and a bearing base; a scraping mechanism, which includes a drive motor mounted on the support base and a rotating shaft mounted on the drive motor, and a side cover plate mounted on the rotating shaft, the side cover plate being provided with an inner scraper and an outer scraper; and a screening mechanism, which includes a fixed disk mounted on the drive motor and an outer screening component mounted on the fixed disk, the outer screening component being provided with a feed hopper, and an inner screening component mounted on the fixed disk.

[0008] In a preferred embodiment of the coal powder screening and pulverizing device of the present invention, the outer screening component includes an outer frame disposed on the fixed plate and fine screen holes disposed on the outer frame; the inner screening component includes an inner frame disposed on the fixed plate and coarse screen holes disposed on the inner frame.

[0009] As a preferred embodiment of the coal powder screening and crushing device of the present invention, it further includes: a pushing mechanism disposed on the rotating shaft, and a crushing mechanism disposed on the fixed plate; the pushing mechanism includes a pushing plate disposed on the rotating shaft, a connecting frame disposed on the pushing plate, and a limiting plate disposed on the connecting frame; the crushing mechanism includes a supporting shaft disposed on the fixed plate, a rolling element rotatably disposed on the supporting shaft, and a guide column disposed on the rolling element.

[0010] In a preferred embodiment of the coal powder screening and crushing device of the present invention, the outer wall of the pushing disc is provided with a first pushing surface, a first limiting surface, a second pushing surface and a second limiting surface in sequence, and the first pushing surface and the second limiting surface are connected to each other.

[0011] As a preferred embodiment of the coal powder screening and crushing device of the present invention, the crushing mechanism further includes an opening and closing member disposed on the rolling element; the opening and closing member includes a closing protrusion disposed on the rolling element and a crushing claw disposed on the closing protrusion.

[0012] As a preferred embodiment of the coal powder screening and crushing device of the present invention, it further includes: a material stacking mechanism disposed on the rolling element; the rolling element includes a rolling plate rotatably disposed on the support shaft, and a receiving groove disposed on the rolling plate; the material stacking mechanism includes a connecting shaft disposed on the receiving groove, and a rotating sleeve disposed on the connecting shaft, and further includes an extrusion plate and a limiting protrusion disposed on the rotating sleeve, and a counterweight is provided on the extrusion plate.

[0013] As a preferred embodiment of the coal powder screening and crushing device of the present invention, the rolling element further includes an arc groove and a material drop groove provided on the receiving groove; the stacking mechanism further includes a rolling head provided on the extrusion plate.

[0014] As a preferred embodiment of the coal powder screening and crushing device of the present invention, the crushing mechanism further includes an anti-jamming component disposed on the support shaft; the anti-jamming component includes a fixing frame disposed on the support shaft and a guide rail disposed on the fixing frame; the material stacking mechanism further includes a slider disposed on the counterweight block.

[0015] In a preferred embodiment of the coal powder screening and crushing device of the present invention, the guide rail includes a limiting rail disposed on the fixed frame and an expansion rail disposed on the limiting rail.

[0016] As a preferred embodiment of the coal powder screening and crushing device of the present invention, the coarse screen holes are provided in a plurality of manner, and the plurality of coarse screen holes are evenly distributed on the surface of the inner frame, with the area of ​​the coarse screen holes accounting for three-quarters of the surface area of ​​the inner frame.

[0017] The beneficial effects of the coal powder screening and crushing device of the present invention are as follows: Coal powder is added through the feed hopper and falls directly into the interior of the inner screening component. The rotation of the shaft causes the inner scraper and outer scraper to rotate. The inner scraper can disperse the coal powder inside the inner screening component, and the outer scraper can push the coal powder between the inner and outer screening components, crushing and pushing the coal powder. Larger coal powder that is difficult to screen is transported back to the inner screening component for re-dispersion and screening. The use of a two-stage screening method combined with circulating screening effectively avoids the problems of coal powder accumulation and blockage, and improves the screening efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall coal powder screening and crushing device.

[0020] Figure 2 A schematic diagram showing the open structure of the screening mechanism in a coal powder screening and crushing device.

[0021] Figure 3 This is a schematic diagram of the scraping mechanism of a coal powder screening and crushing device.

[0022] Figure 4 This is a schematic diagram of the connection structure between the scraping mechanism and the internal screening component of a coal powder screening and crushing device.

[0023] Figure 5 This is a schematic diagram of the external and internal screening components of a coal powder screening and crushing device.

[0024] Figure 6 This is a schematic diagram of the connection structure between the fixed disc and the inner screening component of a coal powder screening and crushing device.

[0025] Figure 7 This is a schematic diagram of the pushing mechanism of a coal powder screening and crushing device.

[0026] Figure 8 This is a schematic diagram of the connection structure between the pushing mechanism and the crushing mechanism of the coal powder screening and crushing device.

[0027] Figure 9 This is a schematic diagram of the crushing mechanism and the stacking mechanism of a coal powder screening and crushing device.

[0028] Figure 10 This is a schematic diagram of the connection structure between the opening and closing parts and the crushing parts of a coal powder screening and crushing device.

[0029] Figure 11 This is a schematic diagram of the anti-jamming structure of a coal powder screening and crushing device.

[0030] Figure 12 This is a schematic cross-sectional view of the crushing mechanism and the stacking mechanism of a coal powder screening and crushing device.

[0031] In the picture:

[0032] 100. Supporting institutions;

[0033] 101. Support seat; 102. Bearing seat;

[0034] 200. Scraping mechanism;

[0035] 201. Drive motor; 202. Rotary shaft; 203. Side cover plate; 204. Inner scraper bar; 205. Outer scraper plate;

[0036] 300. Screening mechanism;

[0037] 301. Fixed plate; 302. External screening component; 303. Feed hopper; 304. Internal screening component;

[0038] 302a, outer frame; 302b, fine sieve holes;

[0039] 304a, inner frame; 304b, coarse sieve holes;

[0040] 400. Pushing mechanism;

[0041] 401. Push plate; 402. Connecting frame; 403. Limiting plate;

[0042] Q1, First extrapolation surface; Q2, First limiting surface; Q3, Second extrapolation surface; Q4, Second limiting surface;

[0043] 500. Crushing mechanism;

[0044] 501. Support shaft; 502. Rolling component; 503. Guide post; 504. Opening and closing component; 505. Anti-jamming component;

[0045] 502a, rolling plate; 502b, receiving groove; 502c, arc groove; 502d, material discharge chute;

[0046] 504a, Closed protrusion; 504b, Crushing claw;

[0047] 505a, Fixture; 505b, Guide rail;

[0048] 505b-1, Limiting rail; 505b-2, Expansion rail;

[0049] 600. Stacking mechanism;

[0050] 601. Connecting shaft; 602. Rotating sleeve; 603. Extrusion plate; 604. Rolling head; 605. Counterweight; 606. Limiting protrusion; 607. Slider. Detailed Implementation

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0052] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0053] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0054] Example 1, referring to Figures 1 to 12 This is the first embodiment of the present invention, which provides a coal powder screening and crushing device, including: a support mechanism 100, which includes a support base 101 and a bearing seat 102; a scraping mechanism 200, which includes a drive motor 201 mounted on the support base 101, a rotating shaft 202 mounted on the drive motor 201, and a side cover plate 203 mounted on the rotating shaft 202, the side cover plate 203 being provided with an inner scraper 204 and an outer scraper 205; in this embodiment, the drive motor 201 is fixedly mounted on one side of the support base 101. 01. The output end of the drive motor 201 is fixedly mounted with a rotating shaft 202 via a coupling. One end of the rotating shaft 202 is connected to the bearing seat 102. The side cover plate 203 is fixedly connected to the outer wall of the rotating shaft 202. The inner scraper 204 is fixedly mounted on the surface of the side cover plate 203. The inner scraper 204 has an L-shaped structure. There are six inner scraper 204s, which are evenly distributed in a circle on the surface of the side cover plate 203. There are three outer scraper plates 205s, which are fixedly mounted on the edge of one side of the side cover plate 203 and are evenly distributed in a circle.

[0055] The screening mechanism 300 includes a fixed disk 301 mounted on a drive motor 201 and an outer screening component 302 mounted on the fixed disk 301. The outer screening component 302 is provided with a feed hopper 303. The mechanism also includes an inner screening component 304 mounted on the fixed disk 301. In this embodiment, the fixed disk 301 is fixedly mounted on the surface of the drive motor 201. The outer screening component 302 and the inner screening component 304 are fixedly mounted on the side of the fixed disk 301 near the side cover plate 203. The feed hopper 303 is fixedly mounted on the top of the outer screening component 302. The inner screening component 304 is disposed inside the outer screening component 302.

[0056] Specifically, the outer screening component 302 includes an outer frame 302a disposed on the fixed disk 301, and fine screen holes 302b disposed on the outer frame 302a. In this embodiment, the outer frame 302a is fixedly disposed on one side of the fixed disk 301, the fine screen holes 302b are evenly opened on the surface of the outer frame 302a, and the top of the outer frame 302a is provided with a feed inlet that matches the feed hopper 303.

[0057] Preferably, the inner screening component 304 includes an inner frame 304a disposed on the fixed plate 301, and coarse screening holes 304b disposed on the inner frame 304a. A plurality of coarse screening holes 304b are provided, and the plurality of coarse screening holes 304b are evenly distributed on the surface of the inner frame 304a. The area of ​​the coarse screening holes 304b is three-quarters of the surface area of ​​the inner frame 304a.

[0058] In operation, the drive motor 201 rotates the shaft 202, and the coal powder raw material is fed into the inner screening component 302 through the feed hopper 303 and falls directly into the inner screening component 304. The rotation of the shaft 202 causes the inner scraper 204 to rotate, and the inner scraper 204 scrapes against the inner surface of the inner screening component 304 to assist in the screening of the coal powder inside the inner screening component 304, improve screening efficiency, and break up clumps of coal powder. At the same time, the rotation of the side cover plate 203 drives the outer scraper 205 to rotate. The outer scraper 205 is positioned between the inner screening component 304 and the outer screening component 302, and its two sides slide against the outer frame 302a and the inner frame 304a respectively. Since the diameter of the fine screen hole 302b is smaller than the diameter of the coarse screen hole 304b, the coal powder falling from the inner screening component 304... Coal powder falling into the outer screening component 302 can pass through the fine screen hole 302b and be discharged after screening. Coal powder with a diameter larger than the fine screen hole 302b is crushed and pushed by the rotation of the outer scraper 205. The scraping of the outer scraper 205 can improve the screening efficiency and avoid clogging. When the outer scraper 205 pushes the coal powder between the inner screening component 304 and the outer screening component 302, since the area of ​​the coarse screen hole 304b accounts for three-quarters of the surface area of ​​the inner frame 304a, when the coal powder that cannot pass through the fine screen hole 302b is pushed to a horizontal state, the coarse screen hole 304b on the inner frame 304a disappears. The coal powder will move to the bottom of the feed hopper 303 with the rotation of the outer scraper 205 and fall back into the inner screening component 304, and be dispersed again by the inner scraper 204.

[0059] In summary, by adopting a two-stage screening method, larger or clump-forming coal powder can be broken up by the inner scraper 204, and the outer scraper 205 can push the accumulated coal powder apart, allowing it to fall back into the feed hopper 303 for re-screening, thereby improving screening efficiency and screening effect.

[0060] Example 2, refer to Figures 1-12 This is the second embodiment of the present invention. Unlike the previous embodiment, it also includes a pushing mechanism 400 disposed on the rotating shaft 202 and a crushing mechanism 500 disposed on the fixed disk 301. The pushing mechanism 400 includes a pushing disk 401 disposed on the rotating shaft 202, a connecting frame 402 disposed on the pushing disk 401, and a limiting disk 403 disposed on the connecting frame 402. In this embodiment, there are two pushing mechanisms 400, which are parallel to each other. The pushing disk 401 is fixedly disposed on the outer wall of the rotating shaft 202. The pushing disk 401 is fixedly connected to the limiting disk 403 through the C-shaped connecting frame 402. The distance between the outer contour of the pushing disk 401 and the inner contour of the limiting disk 403 is constant.

[0061] Preferably, the crushing mechanism 500 includes a support shaft 501 disposed on the fixed disk 301, and a crushing component 502 rotatably disposed on the support shaft 501, and a guide post 503 disposed on the crushing component 502. In this embodiment, the support shaft 501 is fixedly installed on the side of the fixed disk 301 near the side cover plate 203. The crushing component 502 is rotatably connected to the outer wall of the support shaft 501. There are two crushing components 502, and the two crushing components 502 are symmetrical to each other. The end of the crushing component 502 away from the support shaft 501 is provided with a guide post 503. The end of the guide post 503 is slidably disposed between the pushing disk 401 and the limiting disk 403. The outer wall of the guide post 503 is slidably connected to the outer wall of the pushing disk 401 and slidably connected to the inner wall of the limiting disk 403.

[0062] Specifically, the outer wall of the push disk 401 is sequentially provided with a first outward pushing surface Q1, a first limiting surface Q2, a second outward pushing surface Q3, and a second limiting surface Q4, and the first outward pushing surface Q1 and the second limiting surface Q4 are connected. In this embodiment, as shown... Figure 7 As shown, the first extrapolation surface Q1, the first limiting surface Q2, the second extrapolation surface Q3, and the second limiting surface Q4 are all curved surfaces, and the first extrapolation surface Q1 and the second extrapolation surface Q3 match each other, and the first limiting surface Q2 and the second limiting surface Q4 match each other, forming a twisted figure-eight structure.

[0063] Furthermore, the crushing mechanism 500 also includes an opening / closing member 504 disposed on the crushing member 502; the opening / closing member 504 includes a closing protrusion 504a disposed on the crushing member 502, and a crushing claw 504b disposed on the closing protrusion 504a. In this embodiment, as shown... Figure 10 As shown, each of the two rolling elements 502 is provided with a number of opening and closing elements 504, and the opening and closing elements 504 on the two rolling elements 502 are staggered.

[0064] The rest of the structure is the same as in Example 1.

[0065] During use, the operation of the drive motor 201 causes the rotating shaft 202 to rotate. When adding coal powder or when the coal powder is pushed into the inner frame 304a by the outer scraper 205, the rotation of the push disk 401, in conjunction with the limiting disk 403 limiting the guide column 503, causes the first outer pushing surface Q1 and the second outer pushing surface Q3 to simultaneously push the two guide columns 503 to move, thereby causing the crushing part 502 to deflect and open. As the push disk 401 continues to rotate, the two guide columns 503 slide to fit with the first limiting surface Q2 and the second limiting surface Q4, respectively. Through the rotation of the limiting disk 403, the two guide columns 503 are simultaneously pushed to reset and close. Thus, during the rotation of the rotating shaft 202, the two crushing parts 502 continuously close and open. The falling coal powder falls between the two crushing parts 502 and is crushed by the crushing of the two crushing parts 502.

[0066] When the rolling element 502 opens, due to the deflection of the angle of the rolling element 502, in conjunction with the staggered opening and closing element 504, the rolling element 502, after deflection, can make the closing protrusions 504a interlock and connect with each other, thereby sealing the space between the two rolling elements 502, so that the falling coal powder can accumulate between the open rolling elements 502.

[0067] When the crushing component 502 closes, it crushes the coal powder. At the same time, due to the deflection of the crushing component 502, the closed protrusions 504a separate from each other, and the gap at the bottom opens to allow the coal powder to fall. The coal powder that falls onto the inner frame 304a is screened through the coarse screen hole 304b. Larger particles will remain in the inner frame 304a. As the crushing component 502 continuously opens and closes, the crushing claws 504b also continuously open and close. With the scraping action of the inner scraper 204, when the crushing claws 504b close, they can squeeze and crush the accumulated larger particles.

[0068] In summary, this facilitates the crushing and grinding of falling coal powder.

[0069] Example 3, referring to Figures 1-12 This is the third embodiment of the present invention. Unlike the previous embodiment, it also includes a stacking mechanism 600 disposed on the rolling element 502. The rolling element 502 includes a rolling plate 502a rotatably disposed on the support shaft 501, and a receiving groove 502b disposed on the rolling plate 502a. In this embodiment, the rolling plate 502a and the support shaft 501 are rotatably connected, and the receiving groove 502b is provided on the opposite side of the two rolling plates 502a.

[0070] Preferably, the stacking mechanism 600 includes a connecting shaft 601 disposed on the receiving groove 502b, and a rotating sleeve 602 disposed on the connecting shaft 601. It also includes an extrusion plate 603 and a limiting protrusion 606 disposed on the rotating sleeve 602. The extrusion plate 603 is provided with a counterweight 605. In this embodiment, the connecting shaft 601 is fixedly disposed on the inner wall of the receiving groove 502b, and the rotating sleeve 602 is rotatably connected to the outer wall of the connecting shaft 601. The extrusion plate 603 is fixedly disposed on the outer wall of the rotating sleeve 602. After the extrusion plate 603 is deflected, it can be stored in the receiving groove 502b. The counterweight 605 is fixedly disposed on one side of the extrusion plate 603. The limiting protrusion 606 is fixedly disposed on the outer wall of the rotating sleeve 602 and is an integral structure with the rotating sleeve 602. The limiting protrusion 606 can limit the maximum deflection angle of the extrusion plate 603.

[0071] Specifically, the crushing component 502 also includes an arc groove 502c and a discharge groove 502d provided on the receiving groove 502b; the stacking mechanism 600 also includes a crushing head 604 provided on the extrusion plate 603. In this embodiment, the arc groove 502c and the discharge groove 502d allow the crushing head 604 to enter after the extrusion plate 603 rotates, and the crushing head 604 can crush the coal powder between the extrusion plate 603 and the crushing plate 502a.

[0072] Furthermore, the crushing mechanism 500 also includes an anti-jamming component 505 disposed on the support shaft 501; the anti-jamming component 505 includes a fixing frame 505a disposed on the support shaft 501 and a guide rail 505b disposed on the fixing frame 505a; in this embodiment, two fixing frames 505a are provided, and the two fixing frames 505a are fixedly disposed on both sides of the outer wall of the support shaft 501, and the guide rail 505b is fixedly disposed on the fixing frame 505a.

[0073] Preferably, the stacking mechanism 600 also includes a slider 607 disposed on the counterweight 605. In this embodiment, the slider 607 is fixedly mounted on the surface of the counterweight 605 and is used to slide against the surface of the guide rail 505b.

[0074] Preferably, the guide rail 505b includes a limiting rail 505b-1 disposed on the fixed frame 505a, and an expansion rail 505b-2 disposed on the limiting rail 505b-1. In this embodiment, the distance between the limiting rail 505b-1 and the rotation axis of the rolling plate 502a remains constant, while the distance between the expansion rail 505b-2 and the rotation axis of the rolling plate 502a gradually increases.

[0075] The rest of the structure is the same as in Example 2.

[0076] Initially, the two compaction plates 502a are open. Under the action of the counterweight 605 and the limiting protrusion 606, the extrusion plate 603 is also open, limiting its maximum opening angle. Furthermore, due to the action of the limiting rail 505b-1, which, in conjunction with the upper limit rail 505b-1, limits the slider 607, the extrusion plate 603 remains open. When the coal powder falls, it can land on the extrusion plate 603, where it is compacted and rolled. Plate 502a can increase the bearing effect of coal powder. As the rotating shaft 202 rotates, the rolling plate 502a will deflect. After the rolling plate 502a deflects at a certain angle, the counterweights 605 will stick together and abut against each other. At this time, the extrusion plate 603 will rotate. Then, through the rotation of the extrusion plate 603 and the cooperation between the rolling plate 502a, rolling is formed. The rolling head 604 can increase the rolling effect of coal powder. In addition, the arc groove 502c, together with the discharge chute 502d, can push out the rolled coal powder, causing the coal powder to fall.

[0077] After the rolling is completed, the rolling plate 502a will open. During the opening process, due to the resistance of the expansion rail 505b-2 to the slider 607, the extrusion plate 603 can be moved, so that the extrusion plate 603 and the receiving groove 502b are separated to avoid jamming. Then, by the restriction of the limiting rail 505b-1, the extrusion plate 603 is kept open during the opening of the rolling plate 502a, so as to receive the falling coal.

[0078] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0079] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0080] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A coal powder screening and pulverizing device, characterized in that: include, The support mechanism (100) includes a support base (101) and a bearing housing (102). The scraping mechanism (200) includes a drive motor (201) mounted on the support base (101), a rotating shaft (202) mounted on the drive motor (201), and a side cover plate (203) mounted on the rotating shaft (202). The side cover plate (203) is provided with an inner scraper (204) and an outer scraper (205). The screening mechanism (300) includes a fixed disk (301) mounted on the drive motor (201), an outer screening component (302) mounted on the fixed disk (301), a feed hopper (303) mounted on the outer screening component (302), and an inner screening component (304) mounted on the fixed disk (301). It also includes a pushing mechanism (400) provided on the rotating shaft (202) and a crushing mechanism (500) provided on the fixed disk (301); The pushing mechanism (400) includes a pushing disk (401) disposed on the rotating shaft (202), a connecting frame (402) disposed on the pushing disk (401), and a limiting disk (403) disposed on the connecting frame (402). The crushing mechanism (500) includes a support shaft (501) disposed on the fixed plate (301), and a crushing component (502) rotatably disposed on the support shaft (501), and also includes a guide column (503) disposed on the crushing component (502). The outer wall of the push plate (401) is provided with a first push surface (Q1), a first limiting surface (Q2), a second push surface (Q3), and a second limiting surface (Q4) in sequence, and the first push surface (Q1) and the second limiting surface (Q4) are connected to each other; The crushing mechanism (500) also includes an opening and closing member (504) disposed on the crushing member (502); The opening and closing member (504) includes a closing protrusion (504a) provided on the rolling member (502) and a crushing claw (504b) provided on the closing protrusion (504a).

2. The coal powder screening and pulverizing device as described in claim 1, characterized in that: The outer screening component (302) includes an outer frame (302a) disposed on the fixed plate (301) and fine sieve holes (302b) disposed on the outer frame (302a). The inner screening component (304) includes an inner frame (304a) disposed on the fixed plate (301) and a coarse screen hole (304b) disposed on the inner frame (304a).

3. The coal powder screening and pulverizing device as described in claim 2, characterized in that: It also includes a stacking mechanism (600) disposed on the rolling element (502); The rolling element (502) includes a rolling plate (502a) rotatably mounted on the support shaft (501) and a receiving groove (502b) provided on the rolling plate (502a). The stacking mechanism (600) includes a connecting shaft (601) disposed on the receiving groove (502b), and a rotating sleeve (602) disposed on the connecting shaft (601). It also includes an extrusion plate (603) and a limiting protrusion (606) disposed on the rotating sleeve (602). The extrusion plate (603) is provided with a counterweight (605).

4. The coal powder screening and pulverizing device as described in claim 3, characterized in that: The rolling element (502) also includes an arc groove (502c) and a discharge groove (502d) provided on the receiving groove (502b); The stacking mechanism (600) also includes a rolling head (604) disposed on the extrusion plate (603).

5. The coal powder screening and pulverizing device as described in claim 4, characterized in that: The crushing mechanism (500) also includes an anti-jamming component (505) disposed on the support shaft (501); The anti-jamming component (505) includes a fixing frame (505a) disposed on the support shaft (501) and a guide rail (505b) disposed on the fixing frame (505a); The stacking mechanism (600) also includes a slider (607) disposed on the counterweight (605).

6. The coal powder screening and pulverizing device as described in claim 5, characterized in that: The guide rail (505b) includes a limiting rail (505b-1) disposed on the fixed frame (505a) and an expansion rail (505b-2) disposed on the limiting rail (505b-1).

7. The coal powder screening and pulverizing device as described in claim 6, characterized in that: The coarse sieve holes (304b) are provided in a plurality of manner, and the plurality of coarse sieve holes (304b) are evenly laid on the surface of the inner frame (304a), and the area of ​​the coarse sieve holes (304b) is three-quarters of the surface area of ​​the inner frame (304a).

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