A powder classifier and its use in powder classification

Abstract

The application provides a powder selecting machine and application thereof in powder selection. The device realizes collection of fine powder while screening, improves powder selection efficiency, controls rotation of a motor, drives the motor to rotate a threaded rod, drives the pushing plate to move left under the driving of the threaded rod, at this time, coarse powder can be pushed left, when the pushing plate with the stepped structure contacts the baffle, the baffle compresses the spring and moves left under the pushing of the pushing plate, at this time, the coarse powder falls from the left side of the screening cylinder into the shell, and then is discharged through the discharge pipe, which facilitates coarse powder discharge and saves time.

Description

[0001] This application is a divisional application of 2024110431360, which is a ventilation-type negative pressure air classifier. Technical Field

[0002] This invention relates to the field of engineering machinery technology, and in particular to a classifier and its application in classifying powder. Background Technology

[0003] Air classifiers are widely used in coal mills, raw material unloading drying mills, and cement mill systems in new dry process cement production lines; they can be divided into three main categories: three-stage air classifiers, centrifugal air classifiers, and cyclone air classifiers.

[0004] The existing equipment requires screening through a circular screen during the powder selection process. During the screening process, fine powder floats, resulting in low screening efficiency. It is also unable to automatically extract the fine powder during the screening process. In addition, the existing equipment requires opening the shell when adding material into the circular screen, which is cumbersome.

[0005] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a ventilated negative pressure air classifier in order to achieve a more practical purpose. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a ventilated negative pressure air classifier, which solves the problems of existing devices requiring screening through a circular screen during the air classification process, resulting in low screening efficiency due to fine powder floating during screening, and the inability to automatically extract fine powder during screening; and the cumbersome operation of existing devices requiring opening the casing when adding material to the circular screen.

[0007] The present invention provides a ventilated negative pressure air classifier, specifically including: an outer shell; an exhaust pipe welded to the upper part of the outer shell, an exhaust pipe welded to the lower part of the outer shell, and a screening part installed on the outer shell.

[0008] Furthermore, the screening part consists of a connecting shaft, a concave seat, a cover plate, a motor, a threaded rod, a push plate, a locking hole, and a screening cylinder. A connecting shaft rotates on the outer casing and is connected to the drive motor of the external device. A concave seat is welded to one end of the left side of the connecting shaft. The concave seat is welded to the cover plate, and the cover plate is fixed on the screening cylinder.

[0009] Furthermore, a motor is fixed to the right end face of the cover plate, and a threaded rod is fixed to the output shaft of the motor. A pusher plate is threadedly connected to the threaded rod. The pusher plate has a stepped plate structure, and the outer wall of the pusher plate is in contact with the inner wall of the screening cylinder.

[0010] Furthermore, a blocking part is installed on the screening cylinder. The blocking part consists of a guide rod, a baffle, and a spring. Two stepped shaft-shaped guide rods are fixed on the right end face of the screening cylinder. A baffle slides on the two guide rods, and a spring is sleeved on each of the two guide rods. Under the push of the spring force, the right end face of the baffle elastically contacts the left side of the screening cylinder, at which time the screening cylinder is in a sealed state.

[0011] Furthermore, the exhaust pipe is connected to the fine powder collection box via a connecting pipe, and a fan is fixed inside the exhaust pipe.

[0012] Furthermore, the outer casing is equipped with a feeding section, which consists of a first electric cylinder, a connecting block, a feeding pipe, and a feeding hole. A sealing cover is fixed on the right side of the outer casing, and a first electric cylinder is welded to the right end face of the sealing cover. A connecting block is fixed to the extended end of the first electric cylinder, and a feeding pipe is welded to the connecting block. A feeding hole is opened on both the cover plate and the push plate. The feeding hole matches the feeding pipe. When the feeding hole and the feeding pipe are aligned, the feeding pipe can be inserted into the feeding hole.

[0013] Furthermore, a locking part is installed on the outer shell, which consists of a mounting block, a second electric cylinder, and a locking rod. A mounting block is welded to the sealing cover on the right side of the outer shell, and a second electric cylinder is welded to the rear end face of the mounting block. A locking rod is welded to the extended end of the second electric cylinder. A locking hole is opened on the connecting shaft, and the locking hole matches the locking rod. When the locking rod passes through the locking hole, the feed hole is aligned with the feed pipe.

[0014] Furthermore, the rear end of the locking rod is polished, and after polishing, the rear end of the locking rod has an arc-shaped structure.

[0015] Furthermore, a fixing assembly is installed on the outer shell. The fixing assembly consists of a base, fixing screws, an adjustment groove, and a support block. Two bases are sleeved on the outer shell, and two fixing screws are inserted into each base.

[0016] Furthermore, the adjustment point of each fixing screw is a hexagonal structure, and each fixing screw has an adjustment groove, which is a hexagonal groove structure.

[0017] Furthermore, each of the base bodies is welded with two support blocks, and the four support blocks respectively contact the bottom end face of the adjustment point of the four fixing screws, at which time the middle part of the four fixing screws is exposed.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In this application, by setting up a fan, the fan is controlled to rotate during the screening process. At this time, the fan can absorb the fine powder at the screening cylinder and then discharge it into the fine powder collection box. Compared with the existing device, this device achieves the collection of fine powder while screening, thus improving the powder selection efficiency.

[0019] This application, through the setting of the screening section and the blocking section, on the one hand, controls the rotation of the motor, which drives the threaded rod to rotate. Under the drive of the threaded rod, the pusher plate moves to the left, which pushes the coarse powder to the left. When the stepped pusher plate contacts the baffle, the baffle compresses the spring and moves to the left under the push of the pusher plate. At this time, the coarse powder falls from the left side of the screening cylinder into the outer shell and is then discharged through the discharge pipe, which facilitates the discharge of coarse powder and saves time. On the other hand, during the screening process, the motor is controlled to rotate back and forth. During the back and forth movement of the pusher plate, the coarse powder can be turned over. In the process of turning over the coarse powder, the separation efficiency between coarse powder and fine powder can be improved, and the fine powder can be easily sucked away by the fan, thereby improving the overall powder selection efficiency.

[0020] This application, through the setting of the locking part and the feeding part, controls the extension of the second electric cylinder. At this time, the locking rod elastically contacts the outer wall of the connecting shaft, controlling the drive and slow rotation of the screening cylinder. When the locking rod is aligned with the locking hole, the locking rod is inserted into the locking hole. At this time, the first electric cylinder is controlled to retract, and the first electric cylinder drives the feeding pipe to move to the left until the feeding pipe is inserted into the feeding hole. At this time, material can be added into the screening cylinder through the feeding pipe. Compared with the existing device, this device does not require opening the outer shell when feeding, making feeding more convenient and faster.

[0021] In this application, by setting up the fixing components, on the one hand, when disassembling the fixing screws, if the adjusting part of the fixing screws is bumped and cannot be disassembled by a wrench, a hex wrench can be inserted into the adjusting groove for disassembly; on the other hand, since the middle part of the four fixing screws is exposed, after the fixing screws are stripped, the fixing screws can be cut off from the middle exposed part of the fixing screws without damaging the base body during cutting, making disassembly and assembly more flexible and convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0023] In the attached diagram: Figure 1 A schematic axial view of the ventilated negative pressure classifier according to the present invention is shown. Figure 2 The present invention is shown Figure 1 A magnified structural diagram at point A; Figure 3 A schematic front view of the ventilated negative pressure classifier according to the present invention is shown. Figure 4 A right-side structural schematic diagram of the ventilated negative pressure classifier according to the present invention is shown; Figure 5 This shows a partially cut-open axial view of the ventilated negative pressure classifier according to the present invention. Figure 6 The present invention is shown Figure 5 Front view structural diagram; Figure 7 A schematic diagram of the axial view structure of the screening part according to the present invention is shown; Figure 8 A schematic axial view of the blocking portion according to the present invention is shown.

[0024] List of reference numerals 1. Outer casing; 101. Extraction pipe; 102. Discharge pipe; 2. Fixing components; 201. Base; 202. Fixing screw; 203. Adjustment groove; 204. Support block; 3. Screening section; 301. Connecting shaft; 302. Concave seat; 303. Cover plate; 304. Motor; 305. Threaded rod; 306. Pushing plate; 307. Locking hole; 308. Screening cylinder; 4. Blocking part; 401. Guide rod; 402. Baffle; 403. Spring; 5. Feeding section; 501. First electric cylinder; 502. Connecting block; 503. Feeding pipe; 504. Feeding hole; 6. Fan; 7. Locking mechanism; 701. Mounting block; 702. Second electric cylinder; 703. Locking rod. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used in embodiments of this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in this embodiment of the invention.

[0027] The terms "first," "second," and similar words used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Likewise, the terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, spatial and directional terms such as "upper," "lower," "front," "rear," "top," "bottom," "vertical," and "horizontal" may be used to describe embodiments of the invention; however, it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect," "link," "fix," and "attach" can refer to a direct connection between two elements or structures without other elements or structures, or to an indirect connection between two elements or structures through an intermediate element or structure, unless otherwise expressly stated herein. Example 1

[0028] As attached Figure 1 To be continued Figure 8 As shown: The present invention provides a ventilated negative pressure air classifier, comprising: a shell 1; an exhaust pipe 101 welded to the top of the shell 1, an exhaust pipe 102 welded to the bottom of the shell 1, and a screening part 3 installed on the shell 1.

[0029] The screening section 3 consists of a connecting shaft 301, a concave seat 302, a cover plate 303, a motor 304, a threaded rod 305, a pusher plate 306, a locking hole 307, and a screening cylinder 308. A connecting shaft 301 is rotatably mounted on the outer casing 1 and connected to the drive motor of the external device. A concave seat 302 is welded to one end of the left side of the connecting shaft 301. The concave seat 302 is welded to the cover plate 303, and the cover plate 303 is fixed to the screening cylinder 308.

[0030] Among them, a motor 304 is fixed on the right end face of the cover plate 303, and a threaded rod 305 is fixed on the output shaft of the motor 304. A pusher plate 306 is threadedly connected to the threaded rod 305. The pusher plate 306 has a stepped plate structure, and the outer wall of the pusher plate 306 is in contact with the inner wall of the screening cylinder 308.

[0031] The screening cylinder 308 is equipped with a blocking part 4, which consists of guide rods 401, baffles 402, and springs 403. Two stepped shaft-shaped guide rods 401 are fixed to the right end face of the screening cylinder 308. A baffle 402 slides on the two guide rods 401, and a spring 403 is sleeved on each of the two guide rods 401. Under the elastic force of the springs 403, the right end face of the baffle 402 elastically contacts the left side of the screening cylinder 308, at which time the screening cylinder 308 is in a sealed state. When it is necessary to discharge coarse powder from the screening cylinder 308, the motor 304 is controlled to rotate. The motor 304 drives the threaded rod 305 to rotate. Under the drive of the threaded rod 305, the pusher plate 306 moves to the left. At this time, the coarse powder can be pushed to the left. When the stepped pusher plate 306 contacts the baffle 402, the baffle 402 compresses the spring 403 and moves to the left under the push of the pusher plate 306. At this time, the coarse powder falls from the left side of the screening cylinder 308 into the outer shell 1 and is then discharged through the discharge pipe 102.

[0032] The exhaust pipe 101 is connected to the fine powder collection box via a connecting pipe. A fan 6 is fixed inside the exhaust pipe 101. During the screening process, the fan 6 is controlled to rotate. At this time, the fan 6 can absorb the fine powder at the screening cylinder 308 and then discharge it into the fine powder collection box.

[0033] The outer casing 1 is equipped with a feeding section 5, which consists of a first electric cylinder 501, a connecting block 502, a feeding pipe 503, and a feeding hole 504. A sealing cover is fixed on the right side of the outer casing 1. A first electric cylinder 501 is welded to the right end of the sealing cover. A connecting block 502 is fixed to the extended end of the first electric cylinder 501. A feeding pipe 503 is welded to the connecting block 502. A feeding hole 504 is opened on both the cover plate 303 and the push plate 306. The feeding hole 504 matches the feeding pipe 503. When the feeding hole 504 and the feeding pipe 503 are aligned, the feeding pipe 503 can be inserted into the feeding hole 504.

[0034] The outer casing 1 is equipped with a locking part 7, which consists of a mounting block 701, a second electric cylinder 702, and a locking rod 703. A mounting block 701 is welded to the sealing cover on the right side of the outer casing 1. A second electric cylinder 702 is welded to the rear end face of the mounting block 701, and a locking rod 703 is welded to the extended end of the second electric cylinder 702. A locking hole 307 is provided on the connecting shaft 301, which matches the locking rod 703. When the locking rod 703 passes through the locking hole 307, the feed hole 504... When the feed pipe 503 is aligned, the second electric cylinder 702 is extended during feeding. At this time, the locking rod 703 elastically contacts the outer wall of the connecting shaft 301, controlling the drive and slow rotation of the screening cylinder 308. When the locking rod 703 is aligned with the locking hole 307, the locking rod 703 is inserted into the locking hole 307. At this time, the first electric cylinder 501 is retracted, and the first electric cylinder 501 drives the feed pipe 503 to move to the left until the feed pipe 503 is inserted into the feed hole 504. At this time, material can be added to the screening cylinder 308 through the feed pipe 503.

[0035] The rear end of the locking rod 703 is polished, and after polishing, the rear end of the locking rod 703 has an arc-shaped structure, which makes it smoother when the locking rod 703 is inserted into the locking hole 307.

[0036] The outer shell 1 is equipped with a fixing component 2, which consists of a base 201, fixing screws 202, an adjustment groove 203 and a support block 204. Two bases 201 are fitted onto the outer shell 1, and two fixing screws 202 are inserted into each base 201. When fixing this device, the four fixing screws 202 are fixed at the installation position. Example 2

[0037] Based on Embodiment 1, the method further includes: the adjustment point of each fixing screw 202 is a hexagonal structure, and each fixing screw 202 has an adjustment groove 203. The adjustment groove 203 is a hexagonal groove structure. When disassembling the fixing screw 202, if the adjustment point of the fixing screw 202 is bumped and cannot be disassembled by a wrench, a hexagonal wrench can be inserted into the adjustment groove 203 for disassembly. Example 3

[0038] Based on Embodiment 2, it further includes: two support blocks 204 are welded on each seat 201, and the four support blocks 204 respectively contact the bottom end face of the adjustment point of the four fixing screws 202. At this time, the middle part of the four fixing screws 202 is exposed. After the fixing screws 202 slip, the fixing screws 202 can be cut off from the middle exposed part of the fixing screws 202 without damaging the seat 201.

[0039] The specific usage and function of this embodiment are as follows: During feeding, the second electric cylinder 702 is extended, at which time the locking rod 703 elastically contacts the outer wall of the connecting shaft 301, controlling the drive and slow rotation of the screening cylinder 308. When the locking rod 703 is aligned with the locking hole 307, the locking rod 703 is inserted into the locking hole 307. At this time, the first electric cylinder 501 is retracted, and the first electric cylinder 501 drives the feed pipe 503 to move to the left until the feed pipe 503 is inserted into the feed hole 504. At this time, material can be added to the screening cylinder 308 through the feed pipe 503. During screening, the motor driving the screening cylinder 308 is rotated. During the rotation of the screening cylinder 308... In the process of screening, the fine powder in the screening cylinder 308 can be absorbed and then discharged into the fine powder collection box. When it is necessary to discharge the coarse powder in the screening cylinder 308, the motor 304 is controlled to rotate. The motor 304 drives the threaded rod 305 to rotate. Under the drive of the threaded rod 305, the push plate 306 moves to the left. At this time, the coarse powder can be pushed to the left. When the stepped push plate 306 contacts the baffle 402, the baffle 402 compresses the spring 403 and moves to the left under the push of the push plate 306. At this time, the coarse powder falls from the left side of the screening cylinder 308 into the outer shell 1 and is then discharged through the discharge pipe 102.

Claims

1. A classifier, characterized in that, include: The outer shell (1) is equipped with an exhaust pipe (101) welded on the top and an exhaust pipe (102) welded on the bottom. A screening part (3) is installed on the outer shell (1). The screening part (3) consists of a connecting shaft (301), a concave seat (302), a cover plate (303), a motor (304), a threaded rod (305), a push plate (306), a locking hole (307), and a screening cylinder (308). A connecting shaft (301) is rotatably connected to the drive motor of the external device on the outer shell (1). A concave seat (302) is welded to one end of the connecting shaft (301). The concave seat (302) is welded to the cover plate (303), and the cover plate (303) is fixed to the screening cylinder (308). A blocking part (4) is installed on the screening cylinder (308). The blocking part (4) consists of a guide rod (401), a baffle (402) and a spring (403). Two stepped shaft-shaped guide rods (401) are fixed on the right end face of the screening cylinder (308). A baffle (402) slides on the two guide rods (401). A spring (403) is sleeved on each of the two guide rods (401). Under the elastic force of the spring (403), the right end face of the baffle (402) is in elastic contact with the left side of the screening cylinder (308). At this time, the screening cylinder (308) is in a sealed state. A motor (304) is fixed on the right end face of the cover plate (303). A threaded rod (305) is fixed on the output shaft of the motor (304). A pusher plate (306) is threadedly connected to the threaded rod (305). The pusher plate (306) has a stepped plate structure. The outer wall of the pusher plate (306) is in contact with the inner wall of the screening cylinder (308). The exhaust pipe (101) is connected to the fine powder collection box via a connecting pipe; The outer shell (1) is equipped with a feeding part (5), which consists of a first electric cylinder (501), a connecting block (502), a feeding pipe (503) and a feeding hole (504). A sealing cover is fixed on the right side of the outer shell (1). A first electric cylinder (501) is welded to the right end of the sealing cover. A connecting block (502) is fixed to the extended end of the first electric cylinder (501). A feeding pipe (503) is welded to the connecting block (502). A feeding hole (504) is opened on both the cover plate (303) and the push plate (306). The feeding hole (504) matches the feeding pipe (503). When the feeding hole (504) and the feeding pipe (503) are aligned, the feeding pipe (503) can be inserted into the feeding hole (504). The outer casing (1) is equipped with a locking part (7), which consists of a mounting block (701), a second electric cylinder (702) and a locking rod (703). A mounting block (701) is welded on the sealing cover on the right side of the outer casing (1). A second electric cylinder (702) is welded to the rear end face of the mounting block (701), and a locking rod (703) is welded to the extended end of the second electric cylinder (702). A locking hole (307) is opened on the connecting shaft (301). The locking hole (307) matches the locking rod (703). When the locking rod (703) passes through the locking hole (307), the feed hole (504) is aligned with the feed pipe (503).

2. The air classifier as described in claim 1, characterized in that: The rear end of the locking rod (703) is polished, and the rear end of the locking rod (703) is arc-shaped after polishing.

3. The air classifier as described in claim 1, characterized in that: The outer shell (1) is equipped with a fixing component (2), which consists of a base (201), a fixing screw (202), an adjustment groove (203) and a support block (204). Two bases (201) are sleeved on the outer shell (1), and two fixing screws (202) are inserted into each base (201).

4. The air classifier as described in claim 1, characterized in that: The adjustment point of each fixing screw (202) is a hexagonal structure, and an adjustment groove (203) is provided on the adjustment point of each fixing screw (202). The adjustment groove (203) is a hexagonal groove structure.

5. The air classifier as described in claim 1, characterized in that: Two support blocks (204) are welded onto each of the bases (201). The four support blocks (204) are in contact with the bottom end face of the adjustment point of the four fixing screws (202), and the middle part of the four fixing screws (202) is exposed at this time.

6. The application of the classifier according to any one of claims 1-5 in powder classification, characterized in that: include: During feeding, the second electric cylinder (702) is extended, and the locking rod (703) elastically contacts the outer wall of the connecting shaft (301), controlling the drive and slow rotation of the screening cylinder (308). When the locking rod (703) is aligned with the locking hole (307), the locking rod (703) is inserted into the locking hole (307). At this time, the first electric cylinder (501) is retracted, and the first electric cylinder (501) drives the feed pipe (503) to move to the left until the feed pipe (503) is inserted into the feed hole (504). At this time, material can be added to the screening cylinder (308) through the feed pipe (503). During screening, the motor driving the screening cylinder (308) is rotated. During the operation, screening can be performed; fine powder at the screening cylinder (308) is absorbed and then discharged into the fine powder collection box; when it is necessary to discharge the coarse powder in the screening cylinder (308), the motor (304) is controlled to rotate, the motor (304) drives the threaded rod (305) to rotate, and the push plate (306) moves to the left under the drive of the threaded rod (305). At this time, the coarse powder can be pushed to the left. When the stepped push plate (306) contacts the baffle (402), the baffle (402) compresses the spring (403) and moves to the left under the push of the push plate (306). At this time, the coarse powder falls from the left side of the screening cylinder (308) into the outer shell (1) and is then discharged through the discharge pipe (102).

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