CN213434792U - Double-layer coal mill - Google Patents

Abstract

The utility model discloses a double-deck coal pulverizer, include: the rotary drum is arranged in the box body; the first grinding shaft is provided with a spiral blade, the first grinding shaft is erected in the rotary drum and is driven by a first motor, a bearing seat is arranged below the rotary drum, and a first transmission device is arranged between the first grinding shaft and the first motor; the bottom of the rotary drum is provided with a first perforated grid plate; a cavity between the rotary drum and the box body is arranged below the first perforated grid plate, a rotary stirring impeller is arranged in the cavity, the axis of the rotary stirring impeller is concentric with the first grinding shaft, and the rotary stirring impeller is driven by a second motor; the rotating speed of the second motor is higher than that of the first motor; the bottom of the cavity is surrounded with the impeller, a plurality of second grinding shafts with reverse spiral blades are arranged for pushing the pulverized coal to the impeller, and each second grinding shaft is provided with an independent motor and an independent rotating shaft; the top of the box body is provided with a feeding hole, and the bottom of the box body is also provided with a discharging hole for discharging powder. The device crocus is efficient, and buggy granule is fine, the high quality.

Description

Double-layer coal mill

Technical Field

The utility model relates to a buggy production line especially relates to a double-deck coal pulverizer.

Background

Coal mills are machines for breaking up and grinding coal briquettes into coal dust, which are important auxiliary equipment for coal dust furnaces. The common ball mill belongs to a device for grinding coal powder by low-speed rotation. The ball mill realizes crushing coal mines into coal powder through collision of steel balls with different specifications and coal blocks.

In the prior art, a plurality of vertical ball mills are commonly used, and the rotation of the coal blocks and the steel balls is stirred through vertical propellers. For example: a ball mill having publication number CN 108722572A. Among these techniques, the coal briquette in the ball-milling equipment is rotated through single pole stirring, because can only rotate in the cavity under a speed, efficiency is lower, and the crocus time is longer.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a double-deck coal pulverizer to it is lower to solve prior art efficiency, the longer problem of crocus time.

The embodiment of the utility model discloses double-deck coal pulverizer, include: the rotary drum is arranged in the box body; the first grinding shaft is provided with a spiral blade, the first grinding shaft is erected in the rotary drum and is driven by a first motor, a bearing seat is arranged below the rotary drum, and a first transmission device is arranged between the first grinding shaft and the first motor; the bottom of the rotary drum is provided with a first perforated grate plate; a cavity between the rotary drum and the box body is arranged below the first perforated grid plate, a rotary stirring impeller is arranged in the cavity, the axis of the rotary stirring impeller is concentric with the first grinding shaft, and the rotary stirring impeller is driven by a second motor; the rotating speed of the second motor is higher than that of the first motor; the bottom of the cavity is provided with a plurality of second grinding shafts with reverse spiral blades around the impeller and used for pushing the pulverized coal to the impeller, and each second grinding shaft is provided with an independent motor and an independent rotating shaft; the top of the box body is provided with a feed inlet, and the bottom of the box body is also provided with a discharge outlet for discharging powder.

Further, the second grinding shaft and the bottom wall of the box body form an angle of 45 degrees.

Furthermore, a circular baffle fixedly connected with the box body is arranged between the inner wall of the box body and the rotary drum.

Furthermore, the number of the second grinding shafts is 7, and the second grinding shafts are uniformly arranged on the inner wall of the box body at intervals.

Furthermore, the top surface of the impeller is provided with blades.

Furthermore, 6 blades are arranged on the top surface of the impeller.

Furthermore, the inner wall of the rotary drum is provided with a chromium carbide wear-resistant lining plate.

Furthermore, a second perforated grid plate is arranged at the upper part of the discharge hole.

Further, a control panel is arranged on the outer wall of the box body and is respectively connected with the first motor, the second motor and the second grinding shaft through leads.

Furthermore, a main switch, a rotating speed display screen, a time display screen, a first motor speed setting knob, a second motor speed setting knob and a time setting knob are arranged on the control panel.

The double-layer coal mill provided by the embodiment of the utility model has the advantages that the coal briquette is crushed into coal powder by the first grinding shaft and the impeller successively, the rotating speed of the motor of the impeller is faster, and the grinding efficiency is high; because the impeller can push away the coal cinder, push back the coal cinder to impeller department through the second grinding shaft that has reverse spiral leaf around the impeller, realize the broken coal of impeller many times, the buggy granule of output is fine, the high quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural view of a double-layer coal mill according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the bottom of the case body according to the embodiment of the present invention;

fig. 3 is a schematic diagram of a control panel structure according to an embodiment of the present invention.

In the figure: 1. the automatic grinding machine comprises a box body, a rotating drum, a first grinding shaft, a first motor, a first transmission device, a first perforated plate, a second perforated plate, a rotary wheel, a second motor, a second grinding shaft, a feed inlet, a discharge outlet, a second perforated plate, a control panel, a bearing seat, a baffle plate, a main switch, a rotating speed display screen, a time display screen, a first motor speed setting knob, a second motor speed setting knob, a time setting knob and a time setting knob, wherein the rotating speed display screen is arranged on the box body, the rotating drum is 2, the first grinding shaft is 3, the first motor is 4, the.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses a double-deck coal pulverizer. As shown in fig. 1, the apparatus includes: a box body 1 and a rotary drum 2 arranged in the box body 1. Specifically, the casing 1 and the drum 2 are cylindrical. The grinding device comprises a first grinding shaft 3 provided with a spiral blade, wherein the first grinding shaft 3 is vertically arranged in a rotary drum 2 and is driven by a first motor 4, a bearing seat 14 is arranged below the rotary drum 2, and a first transmission device 5 is arranged between the first grinding shaft 3 and the first motor 4; the bottom of the rotary drum 2 is provided with a first perforated grate plate 6; a cavity between the rotary drum 2 and the box body 1 is arranged below the first perforated grid plate 6, a rotary stirring impeller 7 is arranged in the cavity, the axis of the rotary stirring impeller is concentric with the first grinding shaft 3, and the rotary stirring impeller is driven by a second motor 8; the rotating speed of the second motor 8 is higher than that of the first motor 4; a plurality of second grinding shafts 9 with reverse spiral blades are arranged at the bottom of the cavity in a surrounding manner, and are used for pushing the coal powder to the impeller 7, and each second grinding shaft 9 is provided with an independent motor and an independent rotating shaft; the top of the box body 1 is provided with a feeding hole 10, and the bottom of the box body 1 is also provided with a discharging hole 11 for discharging powder. The coal cinder passes through feed inlet 10 and gets into rotary drum 2, and the spiral leaf of first grinding shaft 3 is rotatory, is garrulous for the fritter with the coal cinder through the ball mill, then the fritter drops to impeller 7 department after 6 filtration of first comb orifice plates, and impeller 7 stirring drives the ball mill and further smashes the coal cinder, can push away the coal cinder simultaneously, and a plurality of second grinding shafts of rethread push back the coal cinder to impeller department, so, realize the broken coal cinder of multitime rotation.

The coal mill of the embodiment belongs to a ball mill, and the selection of the diameter and the number of grinding balls in each layer belongs to the prior art, so that the detailed description is omitted.

In order to improve the efficiency of the impeller to crush coal for multiple times, the second grinding shaft 9 is at an angle of 45 degrees with the bottom wall of the box body 1. The inclined second grinding shaft 9 can efficiently push the coal blocks pushed away by the pulsator 7 back to the pulsator 7. Further, a circular baffle 15 fixedly connected with the box body is arranged between the inner wall of the box body 1 and the rotary drum 2. The baffle 15 can prevent the coal briquette from splashing above the box body 1 when the second grinding shaft 9 pushes back the coal briquette, thereby improving the efficiency of crushing coal by the impeller and avoiding the abrasion caused by the friction of the box body and the coal briquette.

As shown in fig. 2, the number of the second grinding shafts 9 is 7, and the second grinding shafts are uniformly arranged on the inner wall of the box body 1 at intervals. Specifically, each second grinding shaft 9 is distributed at 45-degree intervals.

Preferably, the top surface of the impeller 7 is provided with blades. The top surface of the impeller 7 is provided with 6 blades. The impeller shape of the blades can be set according to the actual pulverized coal crushing.

In order to prolong the service life of the rotary drum, the inner wall of the rotary drum 2 is provided with a chromium carbide wear-resistant lining plate.

Preferably, a second perforated plate 12 is arranged at the upper part of the discharge hole 11. The second perforated plate 12 can filter coarse materials, and the quality of pulverized coal is guaranteed.

In order to facilitate control of the equipment, a control panel 13 is arranged on the outer wall of the box body 1, and the control panel 13 is respectively connected with the first motor 4, the second motor 8 and the second grinding shaft 9 through leads. As shown in fig. 3, the control panel 13 is provided with a main switch 131, a rotational speed display 132, a time display 133, a first motor speed setting knob 134, a second motor speed setting knob 135, and a time setting knob 136.

When in use, the discharge hole 11 is closed, the feed hole 10 is opened to add the coal blocks, and then the feed hole 10 is closed; turning on the main switch 131, observing the value on the rotation speed display screen 132, adjusting the first motor speed setting knob 134 and the second motor speed setting knob 135 to the required rotation speed; the time setting knob 136 is adjusted to the desired time. And opening the discharge hole to obtain pulverized coal after the pulverized coal reaches the preset time.

The control of the motor speed and time of the control panel belongs to the conventional control of the prior art, and is not described again. The skilled person can also use conventional motor control to start and stop, and the user selects the coal grinding time according to the time.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A double-deck coal pulverizer, comprising: the device comprises a box body (1) and a rotary drum (2) arranged in the box body (1);

a first grinding shaft (3) provided with a spiral blade, wherein the first grinding shaft (3) is vertically arranged in the rotary drum (2) and is driven by a first motor (4), a bearing seat (14) is arranged below the rotary drum (2), and a first transmission device (5) is arranged between the first grinding shaft (3) and the first motor (4); the bottom of the rotary drum (2) is provided with a first perforated grate plate (6);

a cavity between the rotary drum (2) and the box body (1) is arranged below the first perforated grid plate (6), a rotary stirring impeller (7) is arranged in the cavity, the axis of the rotary stirring impeller is concentric with the first grinding shaft (3), and the rotary stirring impeller is driven by a second motor (8); the rotating speed of the second motor (8) is higher than that of the first motor (4);

the bottom of the cavity is surrounded with the impeller (7), a plurality of second grinding shafts (9) with reverse spiral blades are arranged for pushing the coal powder to the impeller (7), and each second grinding shaft (9) is provided with an independent motor and an independent rotating shaft;

a feed inlet (10) is arranged at the top of the box body (1), and a discharge outlet (11) for discharging powder is also arranged at the bottom of the box body (1).

2. The double-deck coal mill according to claim 1, characterized in that the second grinding shaft (9) is at 45 degrees to the bottom wall of the casing (1).

3. The double-layer coal mill according to claim 1, characterized in that a ring-shaped baffle (15) fixedly connected with the box body is arranged between the inner wall of the box body (1) and the rotary drum (2).

4. The double-layer coal mill according to claim 1, characterized in that 7 second grinding shafts (9) are arranged and uniformly spaced on the inner wall of the box body (1).

5. The double-layer coal mill according to claim 1, characterized in that the impeller (7) is provided with blades on the top surface.

6. The double-layer coal mill according to claim 5, characterized in that the top surface of the impeller (7) is provided with 6 blades.

7. The double-deck coal pulverizer as claimed in claim 1, characterized in that the inner wall of the rotary drum (2) is provided with a chromium carbide wear-resistant lining plate.

8. The double-deck coal mill according to claim 1, characterized in that the discharge port (11) is provided with a second perforated plate (12) at the upper part.

9. The double-layer coal mill according to claim 1, characterized in that a control panel (13) is arranged on the outer wall of the box body (1), and the control panel (13) is respectively connected with the motors of the first motor (4), the second motor (8) and the second grinding shaft (9) through wires.

10. The double-layer coal mill according to claim 9, characterized in that the control panel (13) is provided with a master switch (131), a rotation speed display screen (132), a time display screen (133), a first motor speed setting knob (134), a second motor speed setting knob (135) and a time setting knob (136).

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