Coarse and fine screening device for pulverized coal processing

Abstract

The utility model relates to the technical field of pulverized coal screening, in particular to a coarse and fine screening device for pulverized coal processing, which comprises a box body, a screening structure is mounted on the end face of an inner cavity of the box body, the screening structure comprises a charging barrel, and a supporting arm is mounted on the side wall of the charging barrel through a connecting groove. A first motor is installed on the side wall of the supporting arm and located outside the charging barrel, a transmission rod is arranged at the driving end of the first motor, an inner groove is formed in the supporting arm, a driving bevel gear is arranged at the other end of the transmission rod and located inside the inner groove, and the charging barrel is rotationally connected with a rotating rod through a connecting hole; by arranging the screening structure, the problems that the size of holes in a screening plate of an existing screening device cannot be adjusted, and pulverized coal cannot be screened in a classified mode according to the thickness of the pulverized coal are solved, the pulverized coal is screened in a classified mode, and therefore the using flexible performance of the screening device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal powder screening, in particular to a coarse and fine screening device for coal powder processing. Background Art

[0002] With the continuous progress of society, my country's industrial level is constantly improving. When coal powder is processed, screening is required. The screened coal powder can be processed according to size. A screening device is needed for screening, so a special coarse and fine screening device for coal powder processing will be used.

[0003] The holes on the screen plate of the existing screening device cannot be adjusted in size, and the coarseness and fineness of the coal powder cannot be graded and screened, which makes the screening device less flexible to use. Therefore, a coarse and fine screening device for coal powder processing is needed to improve the above problems. Utility Model Content

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

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A coarse and fine screening device for coal powder processing comprises a box body, a screening structure is installed on the inner cavity end surface of the box body, the screening structure comprises a barrel, a support arm is installed on the side wall of the barrel through a connecting groove, a first motor is installed on the side wall of the support arm and located outside the barrel, a transmission rod is provided at the driving end of the first motor, an inner groove is opened on the support arm, a driving bevel gear is provided at the other end of the transmission rod and located inside the inner groove, the barrel is rotatably connected to a rotating rod through a connecting hole, a driven bevel gear is provided at the upper end of the rotating rod and located inside the inner groove, a rotating plate is provided at the lower end of the driven bevel gear, a first sieve plate is installed on the inner wall of the barrel and located at the lower side of the rotating plate, A first connecting block is installed on the outer wall of the barrel and is located on the front and rear sides respectively, a mounting block is installed at the bottom of the first connecting block, a second motor is installed on the side wall of the mounting block on the front side, a screw rod is provided at the driving end of the second motor, the screw rod is connected to the front moving block through a thread, a limiting rod is installed on the side wall of the mounting block on the rear side, a rear moving block is slidably connected on the outer wall of the limiting rod, second connecting blocks are installed on the outer wall of the barrel and are located on the front and rear sides respectively, a limiting block is installed at the bottom of the second connecting block, a mounting frame is installed on the corresponding side walls of the front moving block and the rear moving block, a second sieve plate is installed on the inner wall of the mounting frame, and sieve holes are provided on the first sieve plate and the second sieve plate.

[0007] As a preferred solution of the utility model, the upper port of the barrel is connected to the inner cavity end surface of the box body, and the support arm is rotatably connected to the transmission rod through a connecting hole.

[0008] As a preferred solution of the utility model, the limit block on the front side is rotatably connected to the other end of the screw rod through a connecting hole, and the side wall of the limit block on the rear side is connected to the other end of the limit rod.

[0009] As a preferred solution of the utility model, a pull rod is installed on the inner cavity end surface of the box body, and the lower end of the pull rod is fixedly connected to the support arm.

[0010] As a preferred solution of the utility model, a plurality of sieve holes are provided and are evenly distributed, the distance between any two left and right sieve holes is the same as the width of the sieve holes themselves, and the first sieve plate and the second sieve plate have the same structure.

[0011] As a preferred solution of the utility model, a collecting bucket is installed in the inner cavity of the box body and below the second screen plate, a discharge pipe is installed at the bottom of the collecting bucket through a connecting hole, a discharge box is installed on the end surface of the box body through a connecting groove, and the side wall of the box body is connected to the outer wall of the other end of the discharge pipe through a connecting hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, a screening structure is provided in a coarse and fine screening device for coal powder processing, and the second motor in the component is used to rotate forward, the screw rod drives the front moving block to move to the right side, and the mounting frame moves the second screen plate to the right side, so that the screen holes on the second screen plate and the first screen plate are misaligned, and the width of the screen holes on the first screen plate is continuously reduced; the second motor drives the screw rod to rotate in the opposite direction, and the mounting frame moves the second screen plate to the left side, and the width of the screen holes on the first screen plate is continuously increased. By providing the screening structure, the problem that the holes on the screen plate of the existing screening device cannot be adjusted in size and the coarseness of the coal powder cannot be graded and screened is solved, and the graded screening of the coal powder is achieved, thereby improving the flexible use performance of the screening device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cutaway structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the screening structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of point A of the present utility model.

[0018] In the figure: 1. box body; 2. screening structure; 201. barrel; 202. support arm; 203. first motor; 204. transmission rod; 205. inner groove; 206. active bevel gear; 207. rotating rod; 208. driven bevel gear; 209. rotating plate; 210. first sieve plate; 211. first connecting block; 212. mounting block; 213. second motor; 214. screw rod; 215. front moving block; 216. limiting rod; 217. rear moving block; 218. second connecting block; 219. limiting block; 220. mounting frame; 221. second sieve plate; 222. sieve hole; 223. pull rod; 3. collecting bucket; 4. discharge pipe; 5. discharge box. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Example: See Figure 1-4The coarse and fine screening device for coal powder processing shown in the figure comprises a box body 1, a screening structure 2 is installed on the inner cavity end surface of the box body 1, the screening structure 2 comprises a barrel 201, a support arm 202 is installed on the side wall of the barrel 201 through a connecting groove, a first motor 203 is installed on the side wall of the support arm 202 and outside the barrel 201, a transmission rod 204 is arranged at the driving end of the first motor 203, an inner groove 205 is opened on the support arm 202, an active bevel gear 206 is arranged at the other end of the transmission rod 204 and inside the inner groove 205, the barrel 201 is rotatably connected to a rotating rod 207 through a connecting hole, and the rotating rod 207 is connected to the barrel 201 through a connecting hole. A driven bevel gear 208 is arranged at the upper end of the barrel 207 and inside the inner groove 205, and a rotating plate 209 is arranged at the lower end of the driven bevel gear 208. A first sieve plate 210 is installed on the inner wall of the barrel 201 and at the lower side of the rotating plate 209. A first connecting block 211 is installed on the outer wall of the barrel 201 and at the front and rear sides respectively. A mounting block 212 is installed at the bottom of the first connecting block 211. A second motor 213 is installed on the side wall of the front mounting block 212. A screw rod 214 is arranged at the driving end of the second motor 213. The screw rod 214 is connected to a front moving block 215 by a thread. A second motor 213 is installed on the side wall of the rear mounting block 212. A limit rod 216 is installed, and a rear moving block 217 is slidably connected to the outer wall of the limit rod 216. A second connecting block 218 is correspondingly installed on the outer wall of the barrel 201 and located at the front and rear sides. A limit block 219 is installed at the bottom of the second connecting block 218. A mounting frame 220 is installed on the corresponding side walls of the front moving block 215 and the rear moving block 217. A second sieve plate 221 is installed on the inner wall of the mounting frame 220. Sieve holes 222 are opened on the first sieve plate 210 and the second sieve plate 221. The second motor 213 in the assembly rotates forward, and the screw rod 214 drives the front moving block 215 to move to the right, and the mounting frame 22 0 moves the second sieve plate 221 to the right, so that the second sieve plate 221 and the sieve holes 222 on the first sieve plate 210 are misaligned, and the width of the sieve holes 222 on the first sieve plate 210 is continuously reduced; the second motor 213 drives the screw rod 214 to rotate in the opposite direction, and the mounting frame 220 drives the second sieve plate 221 to move to the left, and the width of the sieve holes 222 on the first sieve plate 210 is continuously increased. The screening structure 2 is provided to solve the problem that the holes on the sieve plate of the existing screening device cannot be adjusted in size and the coarseness of the coal powder cannot be graded and screened, so that the coal powder can be graded and screened, thereby improving the flexibility of the screening device.

[0024] In this embodiment, refer to Figure 1 , 3As shown in Figure 4, the upper port of the barrel 201 is connected to the inner cavity end surface of the box body 1, and the support arm 202 is rotatably connected to the transmission rod 204 through the connecting hole; the front limit block 219 is rotatably connected to the other end of the screw rod 214 through the connecting hole, and the side wall of the rear limit block 219 is connected to the other end of the limit rod 216; a pull rod 223 is installed on the inner cavity end surface of the box body 1, and the lower end of the pull rod 223 is fixedly connected to the support arm 202; a pull rod 223 is installed through the inner cavity end surface of the box body 1, and the lower end of the pull rod 223 is fixedly connected to the support arm 202. Because the support arm 202 itself has a certain weight, there will be a problem of unstable installation. The pull rod 223 can provide a certain pulling force for the support arm 202, thereby improving the installation stability of the support arm 202;

[0025] In this embodiment, refer to Figure 1 and 3 As shown, a plurality of sieve holes 222 are provided and are evenly distributed, the distance between any two left and right sieve holes 222 is the same as the width of the sieve hole 222 itself, and the first sieve plate 210 and the second sieve plate 221 have the same structure; a collecting hopper 3 is installed in the inner cavity of the box body 1 and below the second sieve plate 221, a discharge pipe 4 is installed at the bottom of the collecting hopper 3 through a connecting hole, a discharge box 5 is installed on the end surface of the box body 1 through a connecting groove, and the side wall of the box body 1 is connected to the outer wall of the other end of the discharge pipe 4 through a connecting hole; The distance between any two left and right sieve holes 222 is the same as the width of the sieve holes 222 themselves. The first sieve plate 210 and the second sieve plate 221 have the same structure, so that after the connection position between any two left and right sieve holes 222 on the second sieve plate 221 moves to the right, it forms a misalignment with the sieve holes 222 on the first sieve plate 210, and can completely block the sieve holes 222 on the first sieve plate 210, thereby adjusting the size of the sieve holes 222 on the first sieve plate 210 and classifying and screening the coal powder;

[0026] Working principle: When the coarse and fine screening device for coal powder processing is in use, the positions of the first screen plate 210 and the second screen plate 221 are set to be completely staggered, so that the screen hole 222 of the first screen plate 210 is completely blocked as the initial position, and the staff pours a certain amount of coal powder from the discharge box 5 into the barrel 201, and starts the first motor 203 through the control panel. The first motor 203 rotates with the transmission rod 204, and the transmission rod 204 drives the active bevel gear 206 to rotate, and the active bevel gear 206 rotates with the driven bevel gear 208, and the driven bevel gear 208 is driven by the rotating rod 207 and drives the rotating plate 209 to stir the coal powder, and the second motor 213 is started to rotate in the opposite direction, and the second motor 213 drives the screw rod 214 to rotate, and the transmission rod 204 drives the front moving block 215 to move to the left, and the front moving block 215 moves with the installation frame 220, The mounting frame 220 moves the second sieve plate 221 to the left, so that the width of the sieve holes 222 on the first sieve plate 210 that can discharge materials is gradually increased. According to actual needs, the width of the sieve holes 222 on the first sieve plate 210 is increased in different stages until the sieve holes 222 on the first sieve plate 210 and the second sieve plate 221 completely overlap, so that the coal powder can be graded and screened; conversely, the second motor 213 is started to rotate forward, and the operation steps are opposite to the above, and the width of the sieve holes 222 on the first sieve plate 210 can be continuously reduced until the second sieve plate 221 completely blocks the sieve holes 222 on the first sieve plate 210. By setting the screening structure 2, the problem that the holes on the sieve plate of the existing screening device cannot be adjusted in size and the coarseness of the coal powder cannot be graded and screened is solved, and the graded screening of the coal powder is achieved, thereby improving the flexibility of the screening device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coarse and fine screening device for coal powder processing, comprising a housing (1), characterized in that: A screening structure (2) is installed on the inner cavity end surface of the box body (1); The screening structure (2) comprises a barrel (201), a support arm (202) is mounted on the side wall of the barrel (201) via a connecting groove, a first motor (203) is mounted on the side wall of the support arm (202) and located outside the barrel (201), a transmission rod (204) is arranged at the driving end of the first motor (203), an inner groove (205) is formed on the support arm (202), and a transmission rod (204) is arranged at the other end of the transmission rod (204) and located inside the inner groove (205). The barrel (201) is rotatably connected to a rotating rod (207) through a connecting hole, a driven bevel gear (208) is arranged at the upper end of the rotating rod (207) and located inside the inner groove (205), a rotating plate (209) is arranged at the lower end of the driven bevel gear (208), a first sieve plate (210) is installed on the inner wall of the barrel (201) and located below the rotating plate (209), and a second sieve plate (210) is installed on the outer wall of the barrel (201) and located at the front and rear sides thereof. A connecting block (211), a mounting block (212) is installed at the bottom of the first connecting block (211), a second motor (213) is installed on the side wall of the mounting block (212) on the front side, a screw rod (214) is provided at the driving end of the second motor (213), the screw rod (214) is connected to the front moving block (215) through a thread, and a limiting rod (216) is installed on the side wall of the mounting block (212) on the rear side, and a rear moving block is slidably connected to the outer wall of the limiting rod (216) (217), a second connecting block (218) is installed on the outer wall of the barrel (201) and at the front and rear sides respectively, a limiting block (219) is installed at the bottom of the second connecting block (218), a mounting frame (220) is installed on the corresponding side walls of the front moving block (215) and the rear moving block (217), a second sieve plate (221) is installed on the inner wall of the mounting frame (220), and sieve holes (222) are opened on the first sieve plate (210) and the second sieve plate (221).

2. A coarse and fine screening device for coal powder processing according to claim 1, characterized in that: The upper port of the barrel (201) is connected to the inner cavity end surface of the box body (1), and the support arm (202) is rotatably connected to the transmission rod (204) through a connecting hole.

3. A coarse and fine screening device for coal powder processing according to claim 1, characterized in that: The front limit block (219) is rotatably connected to the other end of the screw rod (214) through a connecting hole, and the side wall of the rear limit block (219) is connected to the other end of the limit rod (216).

4. A coarse and fine screening device for coal powder processing according to claim 1, characterized in that: A pull rod (223) is installed on the inner cavity end surface of the box body (1), and the lower end of the pull rod (223) is fixedly connected to the support arm (202).

5. A coarse and fine screening device for coal powder processing according to claim 1, characterized in that: A plurality of the sieve holes (222) are provided and are evenly distributed. The distance between any two left and right sieve holes (222) is the same as the width of the sieve hole (222) itself. The first sieve plate (210) and the second sieve plate (221) have the same structure.

6. A coarse and fine screening device for coal powder processing according to claim 1, characterized in that: A collecting hopper (3) is installed in the inner cavity of the box body (1) and below the second sieve plate (221); a discharge pipe (4) is installed at the bottom of the collecting hopper (3) via a connecting hole; a discharge box (5) is installed on the end surface of the box body (1) via a connecting groove; and a side wall of the box body (1) is connected to the outer wall of the other end of the discharge pipe (4) via a connecting hole.

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