Roller screening machine for pulverized coal

Abstract

The utility model discloses a drum screening machine for pulverized coal, which belongs to the field of formed coke processing and comprises a mounting frame, a drum screen is rotatably connected in the mounting frame, a knocking mechanism is arranged above the drum screen and comprises a mounting frame fixedly connected to the top of the mounting frame, and a rack is slidably connected to the top of the mounting frame. A transverse plate is fixedly connected to the bottom of the rack, a plurality of knocking hammers are fixedly connected to the bottom of the transverse plate, the knocking mechanism further comprises a power assembly, and an auxiliary assembly is arranged between the drum screen and the mounting frame. The screening device has the beneficial effects that the knocking mechanism is arranged, after a power assembly drives a transverse plate to ascend to a certain height, the transverse plate rapidly moves downwards under the action of gravity and the elastic force of a second spring, the part, rotating to the upper portion, of the rotary screen is knocked, large particles blocked in the rotary screen are conveniently knocked off, and the screening efficiency is guaranteed; a limiting plate is fixedly connected to the top of the rack, and a notch is formed in one side of the limiting plate to prevent the gear from affecting descending of the limiting plate.

Description

Technical Field

[0001] The utility model relates to the field of coke processing, in particular to a drum screening machine for coal powder. Background Art

[0002] Shaped coke is a new type of coke made by pressure molding and then carbonization. It has the characteristics of regular shape and uniform size. It is considered to be one of the coking methods to expand the source of coking coal. In the preparation process of shaped coke, coal powder or other carbonaceous powders (such as semi-coke powder, coke powder, petroleum coke powder and charcoal powder, etc.) are the main raw materials, and the coal is pressurized with or without a binder, and then carbonization and other post-treatments are performed to prepare shaped coke. After the raw materials are crushed, they need to be screened using a screening device.

[0003] After searching, the Chinese patent announcement number CN220215622U discloses a simple coal powder drum screening machine. The patent has the characteristics of compact structure, strong practicality and easy maintenance. The screening mechanism is driven by the driving component to rotate to screen the coal powder. The drum screen in the screening mechanism is made of a mesh screen. Compared with the method of punching steel plates in the prior art, it not only has lower requirements on the processing technology, but also greatly reduces the overall weight. Thanks to the simplified structure and weight reduction of the screening mechanism, installation and disassembly are also relatively convenient, and the burden on the motor is also reduced, and later maintenance is also relatively convenient.

[0004] However, during the screening process, larger particles can easily clog the drum screen, affecting the screening efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a drum screening machine for coal powder in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A drum screening machine for coal powder comprises a mounting frame, which is fixed to the ground through a frame, a drum screen is rotatably connected in the mounting frame, a feeding hopper is fixedly connected to the bottom of the mounting frame, a driving mechanism is arranged on one side of the drum screen, the driving mechanism is used to drive the drum screen to rotate, a knocking mechanism is arranged above the drum screen, the knocking mechanism comprises a mounting frame fixedly connected to the top of the mounting frame, a rack is slidably connected to the top of the mounting frame, a cross plate is fixedly connected to the bottom of the rack, a plurality of knocking hammers are fixedly connected to the bottom of the cross plate, a limit plate is fixedly connected to the top of the rack, a notch is provided on one side of the limit plate, a first spring is connected between the limit plate and the mounting frame, the knocking mechanism also comprises a power assembly, the power assembly is used to intermittently drive the rack to move upward, an auxiliary assembly is arranged between the drum screen and the mounting frame, the auxiliary assembly is used to vibrate the drum screen.

[0008] Preferably, the power assembly includes two mounting plates fixedly connected to the top of the mounting frame, one side of one mounting plate is fixedly connected to a rotating motor, the output end of the rotating motor is fixedly connected to a gear, half of the gear has teeth and the other half has no teeth, and the toothed part of the gear is meshed with the rack.

[0009] Preferably, the auxiliary component includes a fixed ring fixedly connected to the outer wall of the drum screen, the outer wall of the fixed ring is fixedly connected to a plurality of circumferentially arranged blocking rods, the inner wall of the mounting frame is provided with a slide groove, a knocking rod is slidably connected in the slide groove, and a second spring is connected between the knocking rod and the slide groove.

[0010] Preferably, the ends of the blocking rod and the knocking rod are both spherical.

[0011] Preferably, the driving mechanism includes two vertical plates fixedly connected to the top of the mounting frame, one side of one of the vertical plates is fixedly connected to a stepper motor, the output end of the stepper motor is connected to a rotating shaft rotatably connected between the two vertical plates through a coupling, a plurality of connecting rods are fixedly connected to the rotating shaft, and the other end of the connecting rods is fixedly connected to the inner wall of the drum screen.

[0012] Preferably, a material discharge port is opened on one side of the installation frame, a material guide plate is fixedly connected to one side of the installation frame, baffles are fixedly connected to the front and rear sides of the material guide plate, a blocking plate is slidably connected between the two baffles, and the blocking plate is located at the material discharge port.

[0013] The beneficial effects are: a knocking mechanism is provided, and after the horizontal plate is driven to rise to a certain height by the power component, the horizontal plate quickly moves downward under the action of gravity and the elastic force of the second spring, and knocks on the part of the drum screen that rotates to the top, so as to knock out the larger particles blocked in the drum screen and ensure the screening efficiency; the top of the rack is fixedly connected to the limit plate, and a notch is provided on one side of the limit plate to prevent the gear from affecting the descent of the limit plate.

[0014] The additional technical features and advantages of the present invention will be more clearly explained in the following description, or can be understood through the specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of a drum screening machine for coal powder described in the utility model;

[0017] Figure 2 It is a front view of a drum screening machine for coal powder according to the utility model;

[0018] Figure 3 It is a top view of a drum screening machine for coal powder described in the utility model;

[0019] Figure 4 This is a right view of the internal structure of a drum screening machine for coal powder described in the utility model;

[0020] Figure 5 It is an enlarged view of point A of a drum screening machine for coal powder described in the utility model.

[0021] The description of the accompanying drawings is as follows: 1. Installation frame; 2. Drum screen; 3. Discharge funnel; 401. Vertical plate; 402. Stepper motor; 403. Rotating shaft; 404. Connecting rod; 501. Installation frame; 502. Rack; 503. Horizontal plate; 504. Percussion hammer; 505. Installation plate; 506. Rotating motor; 507. Gear; 508. Limiting plate; 509. First spring; 601. Fixed ring; 602. Baffle rod; 603. Percussion rod; 604. Second spring; 7. Guide plate; 701. Baffle plate; 702. Blocking plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] like Figure 1-Figure 5As shown, a drum screening machine for coal powder includes a mounting frame 1, which is fixed to the ground through a frame, and the frame includes a bottom plate, which is bolted to the ground, and the four corners of the top of the bottom plate are fixedly connected to support columns, and the mounting frame 1 is fixedly connected to the top of the support columns, and a drum screen 2 is rotatably connected in the mounting frame 1, and a discharge funnel 3 is fixedly connected to the bottom of the mounting frame 1, so as to facilitate timely unloading of qualified raw materials screened out, and a discharge port is opened on one side of the mounting frame 1, and a guide plate 7 is fixedly connected to one side of the mounting frame 1, and a baffle 701 is bolted to the front and rear sides of the guide plate 7, and a blocking plate 702 is slidably connected between the two baffles 701, and the blocking plate 702 is located at the discharge port, and the discharge port is blocked by the blocking plate 702.

[0026] A driving mechanism is provided on one side of the drum screen 2, and the driving mechanism is used to drive the drum screen 2 to rotate. The driving mechanism includes two vertical plates 401 bolted to the top of the mounting frame 1, one side of one of the vertical plates 401 is bolted to a stepper motor 402, and the output end of the stepper motor 402 is connected to a rotating shaft 403 rotatably connected between the two vertical plates 401 through a coupling, and a plurality of connecting rods 404 are fixedly connected to the rotating shaft 403, and the other end of the connecting rod 404 is fixedly connected to the inner wall of the drum screen 2. When the stepper motor 402 is started, the stepper motor 402 drives the rotating shaft 403 to rotate, and the rotating shaft 403 drives the connecting rod 404 to drive the drum screen 2 to rotate.

[0027] A knocking mechanism is arranged above the drum screen 2, and the knocking mechanism includes a mounting frame 501 bolted to the top of the mounting frame 1, a rack 502 is slidably connected to the top of the mounting frame 501, a cross plate 503 is fixedly connected to the bottom of the rack 502, a plurality of knocking hammers 504 are fixedly connected to the bottom of the cross plate 503, a limit plate 508 is fixedly connected to the top of the rack 502, a notch is provided on one side of the limit plate 508 to prevent other equipment from affecting the descent of the limit plate 508, and a first spring 509 is connected between the limit plate 508 and the mounting frame 501.

[0028] The knocking mechanism also includes a power component, which is used to intermittently drive the rack 502 to move upward. The power component includes two mounting plates 505 bolted to the top of the mounting frame 501, one side of one mounting plate 505 is bolted to a rotating motor 506, and the output end of the rotating motor 506 is fixedly connected to a gear 507, half of the gear 507 has teeth and the other half has no teeth, and the toothed part of the gear 507 is meshed with the rack 502. When the toothed half of the gear 507 is meshed with the rack 502, the gear 507 drives the rack 502 to move upward, and the rack 502 drives the cross plate 503 to drive the knocking hammer 504 to move upward. When the toothed half of the gear 507 is turned away, the rack 502, the cross plate 503, and the knocking hammer 504 move downward rapidly under the action of gravity and the elastic force of the first spring 509, and knock on the part of the drum screen 2 that is rotated to the top.

[0029] An auxiliary component is arranged between the drum screen 2 and the mounting frame 1, and the auxiliary component is used to make the drum screen 2 vibrate. The auxiliary component includes a fixing ring 601 fixedly connected to the outer wall of the drum screen 2, and the outer wall of the fixing ring 601 is fixedly connected with a plurality of circumferentially arranged blocking rods 602, and the inner wall of the mounting frame 1 is provided with a sliding groove, and a knocking rod 603 is slidingly connected in the sliding groove, and a second spring 604 is connected between the knocking rod 603 and the sliding groove, and the ends of the blocking rod 602 and the knocking rod 603 are both spherical, so as to facilitate the relative movement of the blocking rod 602 and the knocking rod 603.

[0030] Working principle: when in use, the raw material is added into the drum screen 2 from one end thereof, the stepper motor 402 is started, the stepper motor 402 drives the rotating shaft 403 to drive the connecting rod 404 to rotate, the connecting rod 404 drives the drum screen 2 to rotate, and the raw material is screened. When the drum screen 2 rotates, the fixing ring 601 is driven to rotate, and the fixing ring 601 drives the blocking rod 602 to rotate. When the blocking rod 602 contacts the knocking rod 603, the knocking rod 603 contracts into the chute under the pressure of the blocking rod 602. At this time, the second spring 604 is compressed. When the blocking rod 602 is separated from the knocking rod 603, the knocking rod 603 quickly strikes the fixing ring 601 under the action of the elastic force of the second spring 604, so that the drum screen 2 vibrates, thereby improving the screening efficiency. To improve efficiency, while screening, start the rotating motor 506, which drives the gear 507 to rotate. When the half of the gear 507 with teeth is meshed with the rack 502, the gear 507 drives the rack 502 to move upward, and the rack 502 drives the cross plate 503 to drive the knocking hammer 504 to move upward. When the half of the gear 507 with teeth is turned away, the rack 502, the cross plate 503 and the knocking hammer 504 move downward quickly under the action of gravity and the elastic force of the first spring 509, and knock on the part of the drum screen 2 that rotates to the top, so as to knock out the larger particles blocked in the drum screen 2 and ensure the efficiency of screening. When it is necessary to clean the larger particles screened out in the drum screen 2, pull the blocking plate 702 upward to open the discharge port.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A drum screening machine for coal powder, comprising a mounting frame (1), wherein the mounting frame (1) is fixed to the ground through a frame, a drum screen (2) is rotatably connected inside the mounting frame (1), a feeding hopper (3) is fixedly connected to the bottom of the mounting frame (1), a driving mechanism is provided on one side of the drum screen (2), and the driving mechanism is used to drive the drum screen (2) to rotate, characterized in that: A knocking mechanism is arranged above the drum screen (2), the knocking mechanism comprising a mounting frame (501) fixedly connected to the top of the mounting frame (1), a rack (502) being slidably connected to the top of the mounting frame (501), a cross plate (503) being fixedly connected to the bottom of the rack (502), a plurality of knocking hammers (504) being fixedly connected to the bottom of the cross plate (503), a limit plate (508) being fixedly connected to the top of the rack (502), a notch being provided on one side of the limit plate (508), a first spring (509) being connected between the limit plate (508) and the mounting frame (501), the knocking mechanism further comprising a power assembly, the power assembly being used for intermittently driving the rack (502) to move upwards, an auxiliary assembly being arranged between the drum screen (2) and the mounting frame (1), the auxiliary assembly being used for causing the drum screen (2) to vibrate.

2. A drum screening machine for coal powder according to claim 1, characterized in that: The power assembly comprises two mounting plates (505) fixedly connected to the top of the mounting frame (501), one side of one of the mounting plates (505) is fixedly connected to a rotating motor (506), an output end of the rotating motor (506) is fixedly connected to a gear (507), half of the gear (507) has teeth and the other half has no teeth, and the toothed portion of the gear (507) is meshed with the rack (502).

3. A drum screening machine for coal powder according to claim 1, characterized in that: The auxiliary component comprises a fixing ring (601) fixedly connected to the outer wall of the drum screen (2), the outer wall of the fixing ring (601) being fixedly connected to a plurality of circumferentially arranged blocking rods (602), the inner wall of the mounting frame (1) being provided with a sliding groove, a knocking rod (603) being slidably connected in the sliding groove, and a second spring (604) being connected between the knocking rod (603) and the sliding groove.

4. A drum screening machine for coal powder according to claim 3, characterized in that: The ends of the blocking rod (602) and the knocking rod (603) are both spherical.

5. The drum screening machine for coal powder according to claim 1, characterized in that: The driving mechanism comprises two vertical plates (401) fixedly connected to the top of the installation frame (1), one side of one of the vertical plates (401) is fixedly connected to a stepper motor (402), the output end of the stepper motor (402) is connected to a rotating shaft (403) rotatably connected between the two vertical plates (401) through a coupling, a plurality of connecting rods (404) are fixedly connected to the rotating shaft (403), and the other end of the connecting rod (404) is fixedly connected to the inner wall of the drum screen (2).

6. A drum screening machine for coal powder according to claim 1, characterized in that: A material discharge opening is provided on one side of the installation frame (1), a material guide plate (7) is fixedly connected to one side of the installation frame (1), baffle plates (701) are fixedly connected to the front and rear sides of the material guide plate (7), a blocking plate (702) is slidably connected between the two baffle plates (701), and the blocking plate (702) is located at the material discharge opening.

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