Efficient and energy-saving pulverized coal preparation device

Abstract

The utility model relates to an efficient energy-saving pulverized coal preparation device which comprises a pulverizer body, a rotatable millstone is arranged in the pulverizer body, an arc-shaped protruding edge is arranged on the edge of the millstone, a plurality of supports arranged in an annular array are fixed to the side face of the pulverizer body, inclined grooves are formed in the tops of the supports, and inclined blocks are connected into the inclined grooves in a sliding mode. The top of the inclined block extends out of the support and is fixedly provided with a mounting block, and a plurality of receding holes in one-to-one correspondence with the mounting block are formed in the side face of the flour mill body. Raw coal needing to be ground is put into the device, the raw coal rotates along with the grinding disc, so that the raw coal moves towards the edge of the grinding disc under the action of centrifugal force and is ground by the outer grinding roller when passing through the annular groove in the grinding disc to be ground, and part of materials which are not ground move to the arc-shaped convex edge and are thrown out along the convex edge; and therefore, materials thrown out by the convex edges and materials centrifuged by the grinding disc can be ground between the inner side of the outer grinding roller and the outer side of the inner grinding roller.

Description

Technical Field

[0001] The utility model relates to a pulverized coal preparation technology, in particular to a high-efficiency and energy-saving pulverized coal preparation device. Background Art

[0002] Pulverized coal is one of the main fuels commonly used in some smelters. Pulverized coal preparation is to grind raw coal into dry powder according to production requirements. It includes two parts: raw coal preparation and coal grinding. The purpose of raw coal preparation is to supply raw coal of a certain size to the coal grinding process. It includes the storage and primary crushing of raw coal, the removal of metal objects contained therein, and the protection of coal grinding equipment. Coal grinding includes two main operations: coal drying and grinding.

[0003] Existing coal powder preparation grinding devices often only grind the pulverized coal through grinding discs and grinding rollers to achieve the grinding of pulverized coal. However, when in use, the pulverized coal at the edge of the grinding disc is often difficult to grind, and the coal powder is only ground through the grinding disc and grinding rollers, resulting in low grinding efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient and energy-saving coal powder preparation device to solve the problem that the coal powder at the edge of the existing grinding disc is often difficult to grind and the grinding efficiency is low when the coal powder is only ground by the grinding disc and grinding roller.

[0005] In order to solve the above problems, the utility model provides a high-efficiency and energy-saving coal powder preparation device, including a grinding mill body, a rotatable grinding disc is provided inside the grinding mill body, an arc-shaped convex edge is provided at the edge of the grinding disc, a plurality of supports arranged in a ring array are fixed on the side of the grinding mill body, a bevel is provided on the top of the support, an bevel block is slidably connected in the bevel, the top of the bevel block extends out of the support and is fixed with a mounting block, a plurality of makeshift holes corresponding to the mounting blocks are provided on the side of the grinding mill body, a rotatable outer grinding roller is provided in the grinding mill body, an annular groove for use with the outer grinding roller is provided on the grinding disc, a circular ring is rotatably connected to one side of the outer grinding roller, the circular ring is fixedly installed with the mounting block via a positioning frame, and a rotatable inner grinding roller is provided on the inner side of the outer grinding roller.

[0006] The high-efficiency and energy-saving pulverized coal preparation device provided by the utility model also has the following technical features:

[0007] Furthermore, a plurality of support plates corresponding to the supports are provided above the mounting block, the support plates are fixedly connected to the grinding mill body, a hydraulic cylinder is fixedly installed on the lower side of the support plates, the inclination angle of the hydraulic cylinder and the inclined block is the same, a piston rod is provided on the hydraulic cylinder, and the free end of the piston rod is fixedly installed on the mounting block.

[0008] Furthermore, one side of the positioning frame is fixedly connected to the mounting block, the other side of the positioning frame is connected to the circular ring via a bolt, and one end of the positioning frame passes through the clearance hole.

[0009] Furthermore, a spline hole is provided on the inner side of the inner grinding roller, and a spline shaft is slidably connected in the spline hole.

[0010] Furthermore, a shielding edge is integrally formed on the spline shaft, and one side of the shielding edge is connected to the inner grinding roller via bolts.

[0011] Furthermore, a motor is fixedly mounted on one side of the mounting block, and an output end of the motor is fixedly mounted to one end of the spline shaft.

[0012] The utility model has the following beneficial effects: by feeding raw coal to be ground into the device, the raw coal moves to the edge of the grinding disc under the action of centrifugal force as the grinding disc rotates, and is crushed by the outer grinding roller when passing through the annular groove on the grinding disc, while part of the material that is not crushed moves to the arc-shaped convex edge and is thrown out along the convex edge, so that the material thrown out through the convex edge and the material centrifuged by the grinding disc can be ground between the inner side of the outer grinding roller and the outer side of the inner grinding roller, so that the device improves the grinding efficiency and is convenient for grinding the pulverized coal at the edge of the grinding disc, thereby facilitating the efficient and energy-saving preparation of coal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axonometric diagram of an embodiment of the present utility model;

[0014] Figure 2 It is a right side cutaway view of a broken embodiment of the present utility model;

[0015] Figure 3 It is a schematic structural diagram of the grinding disc, outer grinding roller and inner grinding roller in the embodiment of the present utility model. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0017] like Figures 1 to 3In the embodiment of the high-efficiency and energy-saving coal powder preparation device of the utility model shown, the high-efficiency and energy-saving coal powder preparation device includes a mill body 1, a rotatable grinding disc 2 is provided inside the mill body 1, and an arc-shaped convex edge 3 is provided on the edge of the grinding disc 2. A plurality of supports 4 arranged in a ring array are fixed on the side of the mill body 1, and an inclined groove is provided on the top of the support 4. An inclined block 5 is slidably connected in the inclined groove. The top of the inclined block 5 extends out of the support 4 and is fixed with a mounting block 6. A plurality of makeshift holes 7 corresponding to the mounting blocks 6 are provided on the side of the mill body 1. A rotatable outer grinding roller 8 is provided in the mill body 1, and an annular groove 9 for use with the outer grinding roller 8 is provided on the grinding disc 2. A ring 10 is rotatably connected to one side of the outer grinding roller 8, and the ring 1 0 is fixedly installed on the positioning frame 11 and the mounting block 6. A rotatable inner grinding roller 12 is provided on the inner side of the outer grinding roller 8. When raw coal to be ground is put into the device, the raw coal moves toward the edge of the grinding disc 2 under the action of centrifugal force as the grinding disc 2 rotates. When passing through the annular groove 9 on the grinding disc 2, it is crushed by the outer grinding roller 5, and some uncrushed materials move to the arc-shaped convex edge 3 and are thrown out along the convex edge 3, so that the materials thrown out by the convex edge 3 and the materials centrifuged by the grinding disc 2 can be ground between the inner side of the outer grinding roller 8 and the outer side of the inner grinding roller 13, thereby improving the grinding efficiency and facilitating the grinding of pulverized coal at the edge of the grinding disc 2, thereby facilitating the efficient and energy-saving preparation of coal powder.

[0018] In one embodiment of the present application, preferably, a plurality of support plates 13 corresponding to the supports 4 are provided above the mounting block 6, the support plates 13 are fixedly connected to the grinding mill body 1, and a hydraulic cylinder 14 is fixedly installed on the lower side of the support plate 13. The hydraulic cylinder 14 has the same inclination angle as the inclined block 5. A piston rod is provided on the hydraulic cylinder 14, and the free end of the piston rod is fixedly installed on the mounting block 6. When the outer side of the outer grinding roller 8 is severely worn, making it inconvenient to grind, the mounting block 6 is moved in the inclined direction by starting the hydraulic cylinder 14, so that the outer grinding roller 8 moves with the mounting block 6, thereby facilitating the reuse of the outer grinding roller 8.

[0019] In one embodiment of the present application, preferably, one side of the positioning frame 11 is fixedly connected to the mounting block 6, the other side of the positioning frame 11 is connected to the ring 10 by bolts, and one end of the positioning frame 11 passes through the clearance hole 7, thereby facilitating the disassembly and installation of the outer grinding roller 8.

[0020] In one embodiment of the present application, preferably, a spline hole is opened on the inner side of the inner grinding roller 12, and a spline shaft 15 is slidably connected in the spline hole, so that the rotation of the spline shaft 15 can drive the inner grinding roller 12 to rotate, so that the inner grinding roller 12 and the outer grinding roller 8 rotate relative to each other, and the outer grinding roller 8 and the grinding disc 2 rotate relative to each other, and the other functional components of the grinding mill body 1 are structures in the prior art, so they are not described here.

[0021] In one embodiment of the present application, preferably, a shielding edge 16 is integrally formed on the spline shaft 15 , and one side of the shielding edge 16 is connected to the inner grinding roller 12 by bolts, so that the inner grinding roller 12 and the spline shaft 15 can be detachably installed.

[0022] In one embodiment of the present application, preferably, a motor 17 is fixedly mounted on one side of the mounting block 6, and the output end of the motor 17 is fixedly mounted on one end of the spline shaft 15. By starting the motor 17, the spline shaft 15 and the inner grinding roller 12 can be driven to rotate.

[0023] When the utility model is in use, raw coal to be ground is put into the device. As the grinding disc 2 rotates, the raw coal moves to the edge of the grinding disc 2 under the action of centrifugal force. When passing through the annular groove 9 on the grinding disc 2, the raw coal is crushed by the outer grinding roller 5, and some of the materials that are not crushed move to the arc-shaped convex edge 3 and are thrown out along the convex edge 3. The motor 17 is started, which can drive the spline shaft 15 and the inner grinding roller 12 to rotate, so that the inner grinding roller 12 and the outer grinding roller 8 rotate relative to each other, and the outer grinding roller 8 rotates relative to the grinding disc 2. The outer grinding roller 8 is movable, so that the material thrown out by the convex edge 3 and the material centrifuged by the grinding disc 2 can be ground between the inner side of the outer grinding roller 8 and the outer side of the inner grinding roller 13, so that the device can improve the grinding efficiency and facilitate the grinding of the pulverized coal at the edge of the grinding disc 2, thereby facilitating the efficient and energy-saving preparation of pulverized coal. When the outer side of the outer grinding roller 8 is severely worn and it is not convenient for grinding, the hydraulic cylinder 14 is started to move the mounting block 6 in the inclined direction, so that the outer grinding roller 8 moves with the mounting block 6, so that the outer grinding roller 8 can be reused.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-efficiency and energy-saving coal powder preparation device, comprising a grinding mill body (1), characterized in that: The grinding mill body (1) is provided with a rotatable grinding disc (2) inside, and an arc-shaped convex edge (3) is provided at the edge of the grinding disc (2). A plurality of supports (4) arranged in a ring array are fixed on the side of the grinding mill body (1), and a chute is provided on the top of the support (4). A chute is slidably connected to an inclined block (5). The top of the inclined block (5) extends out of the support (4) and is fixed with a mounting block (6). A plurality of clearance holes (7) corresponding to the mounting blocks (6) are opened on the side of the grinding mill body (1). A rotatable outer grinding roller (8) is provided in the grinding mill body (1), and an annular groove (9) for use with the outer grinding roller (8) is opened on the grinding disc (2). A circular ring (10) is rotatably connected to one side of the outer grinding roller (8), and the circular ring (10) is fixedly installed with the mounting block (6) via a positioning frame (11). A rotatable inner grinding roller (12) is provided on the inner side of the outer grinding roller (8).

2. The high-efficiency and energy-saving pulverized coal preparation device according to claim 1, characterized in that: A plurality of support plates (13) corresponding to the supports (4) are provided above the mounting block (6). The support plates (13) are fixedly connected to the grinding mill body (1). A hydraulic cylinder (14) is fixedly installed on the lower side of the support plates (13). The hydraulic cylinder (14) has the same inclination angle as the inclined block (5). A piston rod is provided on the hydraulic cylinder (14), and the free end of the piston rod is fixedly installed on the mounting block (6).

3. The high-efficiency and energy-saving pulverized coal preparation device according to claim 1, characterized in that: One side of the positioning frame (11) is fixedly connected to the mounting block (6), the other side of the positioning frame (11) is connected to the ring (10) via a bolt, and one end of the positioning frame (11) passes through the clearance hole (7).

4. The high-efficiency and energy-saving pulverized coal preparation device according to claim 1, characterized in that: A spline hole is provided on the inner side of the inner grinding roller (12), and a spline shaft (15) is slidably connected in the spline hole.

5. The high-efficiency and energy-saving pulverized coal preparation device according to claim 4, characterized in that: A shielding edge (16) is integrally formed on the spline shaft (15), and one side of the shielding edge (16) is connected to the inner grinding roller (12) via bolts.

6. The high-efficiency and energy-saving pulverized coal preparation device according to claim 4, characterized in that: A motor (17) is fixedly mounted on one side of the mounting block (6), and an output end of the motor (17) is fixedly mounted on one end of the spline shaft (15).

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