Vibrating screening device for coal dry separator

Abstract

The utility model discloses a vibratory screening device for a coal dry separator, and relates to the technical field of coal dry separators, the vibratory screening device comprises a screening bin, the outer side of the screening bin is fixedly connected with a discharge pipe, the inner side of the screening bin is fixedly connected with telescopic rods, the telescopic rods are uniformly distributed, the inner side of the screening bin is provided with a mounting ring, and the mounting ring is fixedly connected with the discharge pipe. The mounting ring is fixedly connected with the telescopic rod, a screen is rotatably connected to the inner side of the mounting ring, a first motor is fixedly connected to the outer side of the screening bin, one end of the first motor penetrates through the screening bin and extends to an inner cavity of the screening bin, and a first mounting frame is fixedly connected to the bottom of the mounting ring; according to the vibration screening device for the coal dry separator, the structural design is reasonable, coal can be affected by centrifugal force while being subjected to vibration screening, the screening efficiency of the coal is improved, and the situation that coal particles are accumulated on the screen to block screen holes of the screen can be prevented.

Description

A vibrating screening device for dry coal separator Technical Field

[0001] This utility model relates to the field of coal dry separation machine technology, specifically a vibrating screening device for coal dry separation machine. Background Technology

[0002] A dry coal separator is a mechanical device used for coal separation. It separates gangue and impurities from clean coal using physical methods (such as vibration, airflow, or gravity), thereby improving the quality and utilization value of the coal. Dry separators require no water, making them suitable for water-scarce areas or coal processing scenarios sensitive to moisture. They offer advantages such as energy saving, environmental friendliness, ease of operation, and strong adaptability. Their core working principle utilizes the differences in density, particle size, or surface characteristics between coal and impurities, achieving efficient separation through techniques such as screening, airflow separation, or vibration separation. Dry coal separators are widely used in coal washing and mining, and are one of the important pieces of equipment for the clean utilization of coal.

[0003] Existing coal dry separation machines using vibrating screens mostly screen coal by vertical up-and-down vibration. This method has a single motion trajectory and limited screening effect. Furthermore, some coal particles clog the screen openings during screening, reducing screening efficiency. Therefore, a new technical solution needs to be designed to address this issue. Summary of the Invention

[0004] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vibrating screening device for a coal dry separator, comprising a screening chamber, a discharge pipe fixedly connected to the outer side of the screening chamber, and telescopic rods fixedly connected to the inner side of the screening chamber, the telescopic rods being evenly distributed. An installation ring is provided on the inner side of the screening chamber, the installation ring being fixedly connected to the telescopic rods. A screen is rotatably connected to the inner side of the installation ring. Through a rotating mechanism, when the screen vibrates vertically up and down to screen the coal, the screen rotates, causing the coal on the screen to be vibrated and screened under centrifugal force, thus improving the screening efficiency of the coal. Through a turning mechanism, the coal particles on the screen are turned over during coal screening, preventing coal particles from accumulating on the screen and clogging the screen holes, which would reduce the screening efficiency of the coal, thereby improving the screening efficiency of the screen for coal particles.

[0006] Preferably, a first motor is fixedly connected to the outside of the screening chamber, one end of the first motor passes through the screening chamber and extends into the inner cavity of the screening chamber, and the screen is driven to rotate by the first motor.

[0007] Preferably, a rotating rod is fixedly connected to one end of the first motor, and protrusions are fixedly connected to both sides of the outer side of the rotating rod. The protrusions contact the screen to cause the screen to vibrate.

[0008] Preferably, a first mounting frame is fixedly connected to the bottom of the mounting ring, a second motor is fixedly connected to the bottom of the first mounting frame, the top end of the power output shaft of the second motor passes through the first mounting frame and extends to the top of the first mounting frame, and the top end of the power output shaft of the second motor is fixedly connected to the screen, so as to screen the coal through the screen.

[0009] Preferably, a second mounting bracket is fixedly connected to both sides of the top of the mounting ring, and a mounting compartment is fixedly connected between the inner sides of the two second mounting brackets, through which the main structure is installed.

[0010] Preferably, a gear driven rod is rotatably connected to both sides of the inner side of the installation chamber. One end of the gear driven rod passes through the installation chamber and extends to the outer side of the installation chamber. A turning roller is fixedly connected to one end of the gear driven rod. The turning roller turns the coal to prevent clogging of the screen.

[0011] Preferably, a third motor is fixedly connected to the top of the installation compartment, the bottom end of the third motor passes through the installation compartment and extends into the inner cavity of the installation compartment, and a drive gear is fixedly connected to the bottom end of the third motor, the drive gear meshing with the gear driven rod.

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

[0013] 1. This coal dry separator uses a vibrating screening device. Through a rotating mechanism, the screen vibrates vertically up and down to screen the coal. The screen rotates, and the coal on the screen is vibrated and screened under the action of centrifugal force, thereby improving the screening efficiency of the coal.

[0014] 2. The vibrating screening device of this dry coal separator, through the turning mechanism, can turn over the coal particles on the screen during coal screening, preventing coal particles from accumulating on the screen and clogging the screen holes, thus reducing the screening efficiency of coal and improving the screening efficiency of the screen for coal particles. Attached Figure Description

[0015] Figure 1 is a front-view three-dimensional structural schematic diagram of a vibrating screening device for a coal dry separator proposed in this utility model;

[0016] Figure 2 is a bottom-view three-dimensional structural diagram of a vibrating screening device for a coal dry separator proposed in this utility model.

[0017] Figure 3 is a schematic diagram of the main cross-sectional structure of a vibrating screening device for a coal dry separator proposed in this utility model.

[0018] Figure 4 is a bottom sectional view of the vibrating screening device for a coal dry separator proposed in this utility model.

[0019] In the diagram: 100, screening bin; 110, discharge pipe; 120, telescopic rod; 130, first motor; 131, rotating rod; 132, protrusion; 200, mounting ring; 210, screen; 220, first mounting frame; 221, second motor; 230, second mounting frame; 240, mounting bin; 241, gear driven rod; 250, turning roller; 260, third motor; 261, drive gear. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: Please refer to Figures 1-4 again. This utility model provides a vibrating screening device for a coal dry separator, including a screening chamber 100. A discharge pipe 110 is fixedly connected to the outside of the screening chamber 100. Telescopic rods 120 are fixedly connected to the inside of the screening chamber 100 and are evenly distributed. A first motor 130 is fixedly connected to the outside of the screening chamber 100. One end of the first motor 130 passes through the screening chamber 100 and extends into the inner cavity of the screening chamber 100. A rotating rod 131 is fixedly connected to one end of the first motor 130. Protrusions 132 are fixedly connected to both sides of the outer side of the rotating rod 131. A first mounting frame 220 is fixedly connected to the bottom of the mounting ring 200. A second motor 221 is fixedly connected to the bottom of the first mounting frame 220. The top end of the power output shaft of the second motor 221 passes through the first mounting frame 220 and extends to the top of the first mounting frame 220. The top end of the power output shaft of the second motor 221 is fixedly connected to the screen 210.

[0022] Specifically, by starting the first motor 130 to drive the rotating rod 131 to rotate, the top of the protrusion 132 installed on the rotating rod 131 comes into contact with the screen 210, causing the screen 210 to vibrate. At the same time, the second motor 221 is started to drive the screen 210 connected to it to rotate. This allows the coal particles on the screen 210 to be screened by the centrifugal force generated by the rotating screen 210 while being vibrated, thereby improving the screening efficiency of coal.

[0023] Example 2: Please refer to Figures 1-4 again. An installation ring 200 is provided on the inner side of the screening chamber 100. The installation ring 200 is fixedly connected to the telescopic rod 120. A screen 210 is rotatably connected to the inner side of the installation ring 200. Second mounting brackets 230 are fixedly connected to the top two sides of the installation ring 200. An installation chamber 240 is fixedly connected between the inner sides of the two second mounting brackets 230. Gear driven rods 241 are rotatably connected to the inner sides of the installation chamber 240. One end of the gear driven rod 241 passes through the installation chamber 240 and extends to the outer side of the installation chamber 240. A turning roller 250 is fixedly connected to one end of the gear driven rod 241. A third motor 260 is fixedly connected to the top of the installation chamber 240. The bottom end of the third motor 260 passes through the installation chamber 240 and extends to the inner cavity of the installation chamber 240. A drive gear 261 is fixedly connected to the bottom end of the third motor 260. The drive gear 261 meshes with the gear driven rod 241.

[0024] Specifically, by starting the third motor 260, the drive gear 261 connected to it is driven to rotate, which in turn drives the driven rod 241 meshing with it to rotate. This causes the turning roller 250 mounted on the driven rod 241 to rotate along with the driven rod 241, turning over the coal particles on the rotating screen 210, preventing the coal particles from accumulating on the screen 210 and clogging the screen holes.

[0025] Working principle: The first motor 130 is started to drive the rotating rod 131 to rotate, so that the top of the protrusion 132 installed on the rotating rod 131 contacts the screen 210, causing the screen 210 to vibrate. At the same time, the second motor 221 is started to drive the screen 210 connected to it to rotate. The coal particles on the screen 210 are screened by vibration and centrifugal force generated by the rotating screen 210, thus improving the screening efficiency of coal.

[0026] By starting the third motor 260, the drive gear 261 connected to it is driven to rotate, which in turn drives the driven rod 241 meshing with it to rotate. This causes the turning roller 250 mounted on the driven rod 241 to rotate along with the driven rod 241, turning over the coal particles on the rotating screen 210, preventing the coal particles from accumulating on the screen 210 and clogging the screen holes.

[0027] It should be noted that a dry coal separator includes: a feeding device: used to uniformly transport raw coal into the dry separator to ensure the stability and efficiency of the separation process; a vibrating screening device: composed of a screening box, screening screen, vibrating motor, and damping springs, which separates coal according to particle size through vibration; a separation bed (or separation chamber): the core component of the dry separator, which usually uses airflow or gravity separation technology to separate coal from gangue through airflow or vibration; a discharge device: used to discharge the separated clean coal, middlings, and gangue separately, usually including a clean coal outlet, a middlings outlet, and a gangue outlet; a control system: used to adjust parameters such as vibration frequency, airflow, and feeding speed to achieve the best separation effect; and a support frame: supporting the stable operation of the entire equipment, usually equipped with a vibration damping device to reduce the impact of vibration on the equipment.

[0028] Working principle: Raw coal is evenly fed into the dry separator through the feeding device. After preliminary screening to remove large impurities, the vibrating screen device vibrates the screen box through the excitation force generated by the vibrating motor. The coal moves on the screening screen. Smaller particles fall through the screen holes, while larger particles continue to move forward, achieving particle size classification. On the inclined screen surface or vibrating plate, coal and gangue have different movement trajectories due to their different friction coefficients and bouncing characteristics, thus achieving separation. The separated clean coal, middlings, and gangue are discharged through the discharge device, completing the entire separation process.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vibrating screening device for a coal dry separator, comprising a screening chamber (100), characterized in that, A discharge pipe (110) is fixedly connected to the outer side of the screening chamber (100), and a telescopic rod (120) is fixedly connected to the inner side of the screening chamber (100), and the telescopic rods (120) are evenly distributed; an installation ring (200) is provided on the inner side of the screening chamber (100), and the installation ring (200) is fixedly connected to the telescopic rod (120), and a screen (210) is rotatably connected to the inner side of the installation ring (200).

2. The vibrating screening device for a coal dry separator as described in claim 1, characterized in that, A first motor (130) is fixedly connected to the outside of the screening chamber (100). One end of the first motor (130) passes through the screening chamber (100) and extends into the inner cavity of the screening chamber (100).

3. The vibrating screening device for a coal dry separator as described in claim 2, characterized in that, One end of the first motor (130) is fixedly connected to a rotating rod (131), and protrusions (132) are fixedly connected to the outer sides of the rotating rod (131).

4. The vibrating screening device for a coal dry separator as described in claim 3, characterized in that, The bottom of the mounting ring (200) is fixedly connected to a first mounting bracket (220), the bottom of the first mounting bracket (220) is fixedly connected to a second motor (221), the top end of the power output shaft of the second motor (221) passes through the first mounting bracket (220) and extends to the top of the first mounting bracket (220), and the top end of the power output shaft of the second motor (221) is fixedly connected to the screen (210).

5. The vibrating screening device for a coal dry separator as described in claim 1, characterized in that, The top two sides of the mounting ring (200) are fixedly connected to the second mounting bracket (230), and the inner sides of the second mounting bracket (230) on both sides are fixedly connected to the mounting chamber (240).

6. The vibrating screening device for a coal dry separator as described in claim 5, characterized in that, The inner sides of the installation chamber (240) are rotatably connected to gear driven rods (241). One end of the gear driven rod (241) passes through the installation chamber (240) and extends to the outer side of the installation chamber (240). A turning roller (250) is fixedly connected to one end of the gear driven rod (241).

7. The vibrating screening device for a coal dry separator as described in claim 6, characterized in that, A third motor (260) is fixedly connected to the top of the installation chamber (240). The bottom end of the third motor (260) passes through the installation chamber (240) and extends into the inner cavity of the installation chamber (240). A drive gear (261) is fixedly connected to the bottom end of the third motor (260). The drive gear (261) meshes with the gear driven rod (241).

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