Air blocking device of coal mill

Abstract

The utility model relates to the technical field of coal mills, and discloses a coal mill air blocking device which comprises a coal mill inner shell, a millstone and an air ring body located between the coal mill inner shell and the millstone, a positioning mechanism is arranged on the inner surface of the coal mill inner shell, and clamping mechanisms are arranged on the two sides of the air ring body. According to the air ring, the positioning mechanism and the clamping mechanism are arranged, when the air ring body is installed, the air ring body is embedded between an inner shell of the coal mill and a millstone, the air ring body can be preliminarily positioned between the inner shell of the coal mill and the millstone through matched use of the positioning block and the positioning groove, and the air ring body is clamped in the clamping mechanism. And then through cooperative use of the groove body, the motor, the cam, the telescopic rod, the connecting plate, the spring, the sliding block, the sliding groove, the clamping column and the clamping hole, the air ring body can be stably installed between the inner shell of the coal mill and the grinding disc, installation is easy and convenient, manpower is saved, the installation and disassembly efficiency is high, and the using effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mills, in particular to an air blocking device for a coal mill. Background Art

[0002] Coal mill is a machine that breaks coal blocks and grinds them into coal powder. It is an important auxiliary equipment for coal powder furnace. There are vertical mills, high-pressure suspension roller mills, medium-speed micro-powder mills, super-pressure trapezoidal mills, Raymond mills and other models. Vertical mills are grinding equipment that integrates fine crushing, drying, grinding, powder selection and transportation. They are widely used in the grinding and ultra-fine grinding of various solid materials in industries such as cement, building materials, electricity, metallurgy, chemicals, non-metallic minerals, etc. The grinding process of the vertical mill mainly relies on a set of hydraulic vertical mill devices to pressurize the grinding disc material. There is a large amount of coarse powder in the ground material. The airflow of the vertical mill is introduced into the mill air ring through the air inlet duct. The air ring is acted on by the hot air from bottom to top and moves up along the shell. A large amount of coarse powder is sent to the powder classifier through the air flow through the air ring. The powder is selected by the matching powder classifier. The powder selection process is through air flow sorting. The coarse particles collide with the rotor and are thrown out in the direction of the moving blades. During the air flow process, most of the coarse powder automatically falls on the grinding disc and is received for re-grinding. The rest is selected as finished products by the powder classifier and sent to the finished product storage through the dust collection and conveying system.

[0003] The air ring inside the existing coal mill is generally installed by multiple screws. After long-term use, the installed air ring is easily damaged by the influence of hot air and the friction and impact of materials. When disassembling, special tools are required, which is inconvenient and time-consuming and labor-intensive. Therefore, those skilled in the art provide a coal mill air blocking device to solve the problems raised in the above background technology. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a coal mill wind blocking device, which has the advantages of convenient disassembly and assembly, and solves the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a coal mill wind blocking device, comprising a coal mill inner shell, a grinding disc and an air ring body located between the coal mill inner shell and the grinding disc, a positioning mechanism is provided on the inner surface of the coal mill inner shell, a clamping mechanism is provided on both sides of the air ring body, and air holes are evenly provided on the air ring body;

[0008] The positioning mechanism comprises: positioning blocks are arranged at the four corners of the outer surface of the air ring body, and positioning grooves are opened at the four corners of the inner surface of the coal mill inner shell.

[0009] As a preferred technical solution of the present utility model, a group of the positioning blocks are integrally formed with the air ring body.

[0010] As a preferred technical solution of the utility model, a group of positioning blocks all fit into the interior of a group of positioning grooves.

[0011] As the preferred technical solution of the utility model, the card and mechanism include: a groove body is opened in the middle part of both sides of the air ring body, a motor is fixedly arranged at the inner bottom end of the two groove bodies, a cam is fixedly arranged at the output end of the two motors, a group of telescopic rods are fixedly arranged on the adjacent side walls inside the two groove bodies, a connecting plate is fixedly arranged at the telescopic ends of the two groups of telescopic rods, a spring is arranged on the outside of the two groups of telescopic rods, sliders are fixedly arranged at the front and rear ends of the two connecting plates, sliding grooves are opened on the inner front and rear end walls of the two grooves, the two sliders are slidably connected with the inside of the two sliding grooves, card columns are fixedly arranged on the opposite side walls of the two connecting plates, and card holes are opened on both sides of the inner surface of the inner shell of the coal mill.

[0012] As a preferred technical solution of the utility model, the two cams are both located in the middle of one side of the two connecting plates.

[0013] As a preferred technical solution of the utility model, the two clamping columns are both fitted with the inside of the two clamping holes.

[0014] Compared with the prior art, the utility model provides a coal mill wind blocking device, which has the following beneficial effects:

[0015] The utility model provides a positioning mechanism and a clamping mechanism. When installing the air ring body, the air ring body is firstly embedded between the inner shell of the coal mill and the grinding disc. The air ring body can be initially positioned between the inner shell of the coal mill and the grinding disc through the cooperation between the positioning block and the positioning groove. Then, the air ring body can be stably installed between the inner shell of the coal mill and the grinding disc through the cooperation between the groove body, motor, cam, telescopic rod, connecting plate, spring, slider, slide groove, clamping column and clamping hole. The installation is simple and convenient, manpower is saved, the installation and disassembly efficiency is high, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the connection between the inner shell of the coal mill and the positioning groove of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the air ring body and the positioning block connected to the utility model;

[0019] Figure 4It is a structural schematic diagram of the connection between the connecting plate and the clamping column of the utility model.

[0020] Among them: 1. Coal mill inner shell; 2. Grinding disc; 3. Air ring body; 4. Positioning mechanism; 401. Positioning block; 402. Positioning slot; 5. Card and mechanism; 501. Slot body; 502. Motor; 503. Cam; 504. Telescopic rod; 505. Connecting plate; 506. Spring; 507. Slider; 508. Slide slot; 509. Card column; 510. Card hole. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1-Figure 4 A coal mill wind blocking device comprises: a coal mill inner shell 1, a grinding disc 2 and an air ring body 3 located between the coal mill inner shell 1 and the grinding disc 2, a positioning mechanism 4 is arranged on the inner surface of the coal mill inner shell 1, a clamping mechanism 5 is arranged on both sides of the air ring body 3, and air holes are evenly arranged on the air ring body 3;

[0025] The positioning mechanism 4 includes: positioning blocks 401 are arranged at the four corners of the outer surface of the air ring body 3, and positioning grooves 402 are opened at the four corners of the inner surface of the coal mill inner shell 1; a group of positioning blocks 401 are integrally formed with the air ring body 3; a group of positioning blocks 401 are all matched with the inside of a group of positioning grooves 402.

[0026] Furthermore, when installing the air ring body 3, the air ring body 3 is first embedded between the coal mill inner shell 1 and the grinding disc 2, and a group of positioning blocks 401 and a group of positioning grooves 402 are aligned and matched with each other up and down to achieve preliminary positioning.

[0027] The card and mechanism 5 includes: a slot 501 is opened in the middle of both sides of the air ring body 3, a motor 502 is fixedly installed at the bottom of the two slots 501, a cam 503 is fixedly installed at the output end of the two motors 502, a group of telescopic rods 504 is fixedly installed on the adjacent side walls of the two slots 501, and a connecting plate 505 is fixedly installed at the telescopic ends of the two groups of telescopic rods 504, and a spring 506 is installed outside the two groups of telescopic rods 504. The two connecting plates 505 Slide blocks 507 are fixedly provided at the front and rear ends, slide grooves 508 are provided on the front and rear end walls of the two trough bodies 501, and the two slide blocks 507 are slidably connected with the inside of the two slide grooves 508. Clamping columns 509 are fixedly provided on the opposite side walls of the two connecting plates 505, and clamping holes 510 are provided on both sides of the inner surface of the coal mill inner shell 1; the two cams 503 are located in the middle of one side of the two connecting plates 505; the two clamping columns 509 are fitted with the inside of the two clamping holes 510.

[0028] Furthermore, the two motors 502 are started to rotate forward and reverse, and the two cams 503 thereof rotate and trigger the two connecting plates 505 to move. At the same time, the two sets of telescopic rods 504 and the springs 506 are stretched, and the two sliders 507 slide inside the two slide grooves 508, so that the two clamping columns 509 are both engaged with the inside of the two clamping holes 510, and the air ring body 3 can be installed.

[0029] Working principle: When in use, first embed the air ring body 3 between the inner shell 1 of the coal mill and the grinding disc 2, and align and fit a group of positioning blocks 401 and a group of positioning grooves 402 up and down to achieve preliminary positioning, then start the two motors 502 to rotate forward and reverse, and the two cams 503 rotate and touch the two connecting plates 505 to move, while the two groups of telescopic rods 504 and springs 506 are stretched, and the two sliders 507 slide inside the two slide grooves 508, so that the two clamping columns 509 are clamped with the inside of the two clamping holes 510, and the air ring body 3 can be installed.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal mill wind blocking device, comprising: A coal mill inner shell (1), a grinding disc (2), and an air ring body (3) located between the coal mill inner shell (1) and the grinding disc (2), characterized in that: a positioning mechanism (4) is provided on the inner surface of the coal mill inner shell (1), a clamping mechanism (5) is provided on both sides of the air ring body (3), and air holes are evenly provided on the air ring body (3); The positioning mechanism (4) comprises: positioning blocks (401) are arranged at the four corners of the outer surface of the air ring body (3); and positioning grooves (402) are opened at the four corners of the inner surface of the coal mill inner shell (1).

2. A coal mill air blocking device according to claim 1, characterized in that: A group of positioning blocks (401) are integrally formed with the air ring body (3).

3. The coal mill air blocking device according to claim 1, characterized in that: A group of positioning blocks (401) are all fitted into the interior of a group of positioning grooves (402).

4. A coal mill air blocking device according to claim 3, characterized in that: The card and mechanism (5) comprises: a groove body (501) is provided in the middle of both sides of the air ring body (3); a motor (502) is fixedly provided at the bottom end of the two groove bodies (501); a cam (503) is fixedly provided at the output end of the two motors (502); a group of telescopic rods (504) is fixedly provided on the adjacent side walls inside the two groove bodies (501); a connecting plate (505) is fixedly provided at the telescopic ends of the two groups of telescopic rods (504); The outside of the two connecting plates (504) is provided with a spring (506), the front and rear ends of the two connecting plates (505) are fixedly provided with a slider (507), the front and rear end walls of the inner sides of the two trough bodies (501) are provided with a slide groove (508), the two sliders (507) are slidably connected with the inside of the two slide grooves (508), the opposite side walls of the two connecting plates (505) are fixedly provided with a clamping column (509), and the inner surface of the inner shell (1) of the coal mill is provided with a clamping hole (510) on both sides.

5. A coal mill air blocking device according to claim 4, characterized in that: The two cams (503) are both located in the middle of one side of the two connecting plates (505).

6. A coal mill air blocking device according to claim 4, characterized in that: The two clamping posts (509) are both fitted into the interiors of the two clamping holes (510).

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