Grinding track for mechanical mill and crushing chamber provided with grinding track

Through the split-shaped grinding track, the grinding track is fixed with removable tooth plates and screw holes, which solves the problems of difficult production and high maintenance costs of existing grinding tracks, and achieves low-cost and efficient maintenance.

CN223233992UActive Publication Date: 2025-08-19WEIFANG DEL POWDER EQUIP TECH CO LTD
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Patent Information

Application Number
CN202422466153.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-12
Publication Date
2025-08-19
Estimated Expiration
2034-10-12

AI Technical Summary

Technical Problem

The grinding tracks of existing mechanical grinding are integrated structures, which are difficult to make and costly. They also have a lot of scrap steel when replacing them, which makes them have high maintenance costs.

Method used

The grinding track consists of multiple sets of base plates and tooth plates. The tooth plate is detachable and the grinding teeth are inclined outward. The base plate and the tooth plate are fixed through screw holes, installed on the track support plate, and fixed with a locking flange.

Benefits of technology

It reduces the manufacturing cost and replacement and maintenance costs of grinding tracks, facilitates installation and replacement, reduces waste materials, and reduces pressure losses in the crushing chamber.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a grinding track for a mechanical mill and a crushing chamber provided with the grinding track, the grinding track is annular and comprises a plurality of bottom plates which are horizontally arranged in sequence, detachable toothed plates are arranged on the bottom plates, vertically arranged grinding teeth are arranged on the toothed plates, and the included angle between the grinding teeth and the vertical line is 4-8 degrees. And the upper ends of the grinding teeth on the toothed plate are obliquely arranged outwards. The crushing chamber comprises a vertically-arranged cylinder, and the grinding track for the mechanical mill is fixedly installed on the inner side of the cylinder. According to the grinding track for the mechanical mill and the crushing chamber provided with the grinding track, the grinding track is formed by splicing a plurality of groups of bottom plates and toothed plates and is formed by split casting, so that the forming difficulty and the casting difficulty are reduced; manufacturing cost is low, and equipment investment is saved; only the toothed plate part needs to be replaced during maintenance after the grinding track is abraded, so that the maintenance cost is low; the crushing chamber is reasonable in structural design, and the grinding track is convenient to install and replace.
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Description

Technical Field

[0001] The utility model relates to the technical field of solid pulverization, in particular to a grinding track for a mechanical grinder and a pulverization chamber provided with the grinding track. Background Art

[0002] With the advancement of social productivity, mechanical mills are widely used in various industries. Mechanical mills are a type of mill that uses mechanical force to crush solid materials. The material is fed into the grinding chamber of the mechanical mill by a feeding device. The crushing disc is driven by a motor. Under the action of the high-pressure, high-frequency pulsating cyclonic flow generated by the high-speed rotating device, the particles are driven by the cyclonic flow to rotate, thus forming a number of large and small vortices. The material, the high-speed rotating device and the particles squeeze, collide, rub and shear each other, achieving ultra-fine grinding. After the material is crushed by the mechanical mill, its particle size gradually decreases until it reaches the required particle size. The crushed material is transported by the rising airflow to the impeller classification zone. Under the action of the centrifugal force of the classification wheel and the gravitational force of the fan, the coarse and fine powders are separated. The unqualified material is returned to the grinding chamber by the internal classifier for further grinding.

[0003] As a crucial grinding component in a mechanical mill, the grinding track, while a stationary part, is subject to constant impact from the material, causing the track's toothed plates and the teeth on them to wear very easily. Prior art grinding tracks are manufactured as a single piece, cast and then finely machined. This presents drawbacks such as difficulty in production, heavy weight, and high manufacturing costs. Each replacement of the grinding track is not only extremely expensive, but also generates a significant amount of scrap steel. Utility Model Content

[0004] The technical problem that the utility model intends to solve is to address the above shortcomings and provide a grinding track for a mechanical grinder and a crushing chamber provided with the grinding track, which is composed of multiple groups of bottom plates and tooth plates and has the advantages of simple structure, easy processing, low manufacturing cost and low maintenance cost.

[0005] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0006] A grinding track for a mechanical grinder is annular and comprises a plurality of bottom plates arranged horizontally in sequence. The bottom plates are provided with detachable tooth plates, and the tooth plates are provided with vertically arranged grinding teeth.

[0007] As an improvement, the upper ends of the grinding teeth on the tooth plate are arranged to be inclined outward.

[0008] As an improvement, the angle between the grinding teeth and the vertical line is 4° to 8°.

[0009] As an improvement, the front side of the base plate is a plane, the back of the tooth plate is a plane, and the tooth plate is installed on the front side of the base plate; a recessed avoidance area is provided on the back of the base plate.

[0010] As an improvement, the base plate is provided with through holes running through the front and back, and screw holes are provided on the tooth plate at positions corresponding to the through holes. The tooth plate is fixedly mounted on the base plate through the screw holes, the through holes and fasteners.

[0011] As an improvement, the upper end of the base plate is provided with a first fixing portion, and the lower end is provided with a second fixing portion.

[0012] A grinding chamber comprises a vertically arranged cylinder, the inner side of which is fixedly mounted the grinding track for the mechanical grinder.

[0013] As an improvement, an annular track support plate is fixed on the inside of the cylinder, and the grinding track is installed on the upper end of the track support plate; a second fixing part is provided at the lower end of the base plate; and a lower limit part adapted to the second fixing part is provided on the track support plate.

[0014] As an improvement, the lower limiting portion is an upwardly protruding annular limiting ring, and the second fixing portion is located outside the lower limiting portion.

[0015] As an improvement, a first fixing part is provided at the upper end of the base plate, and an annular pressure plate is also provided inside the cylinder, the pressure plate is located at the upper end of the grinding track, an annular upper limit portion is provided at the bottom of the pressure plate, and the first fixing part is located outside the upper limit portion; a flange is provided at the upper end of the cylinder, and a locking flange is installed on the flange; the locking flange presses the pressure plate onto the grinding track from the upper side.

[0016] The utility model adopts the above technical solution and has the following advantages compared with the prior art:

[0017] 1. The grinding track in this design is composed of multiple sets of base plates and tooth plates, which are cast separately to reduce the difficulty of molding and casting; the manufacturing cost is low, saving equipment investment; and when the grinding track is worn, only the tooth plate part needs to be replaced, which reduces the maintenance cost;

[0018] 2. In this design, the upper end of the grinding teeth is tilted outward, and the angle between the grinding teeth and the vertical line is 4° to 8°. This inclination angle is more conducive to the upward flow of materials after being impacted and crushed, reducing the formation of eddy currents in the crushing chamber and effectively reducing the pressure loss in the crushing chamber;

[0019] 3. The structural design of the grinding chamber is reasonable, which is convenient for the installation and replacement of the grinding track.

[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the crushing chamber in an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 AA section view in;

[0023] Figure 3 for Figure 1 Schematic diagram of the structure of the grinding track;

[0024] Figure 4 for Figure 3 Right view;

[0025] Figure 5 for Figure 3 Schematic diagram of the structure of the middle tooth plate;

[0026] Figure 6 for Figure 5 Right view;

[0027] Figure 7 for Figure 5 A top view of

[0028] Figure 8 for Figure 3 Schematic diagram of the structure of the midsole plate;

[0029] Figure 9 for Figure 8 Right view;

[0030] Figure 10 for Figure 8 A top view of

[0031] Among them: 1-base plate, 2-tooth plate, 3-grinding teeth, 4-through hole, 5-screw hole, 6-first fixing part, 7-second fixing part, 8-avoidance area, 9-grinding track, 10-cylinder, 11-track support plate, 12-lower limit part, 13-pressure plate, 14-upper limit part, 15-flange, 16-locking flange, 17-rubber pressure ring. DETAILED DESCRIPTION

[0032] For the purpose of explanation and not limitation, the side of the annular grinding track close to its center is defined as the front, and the opposite direction is defined as the rear.

[0033] Example

[0034] like Figure 1 and Figure 2 As shown together, a grinding chamber comprises a vertically arranged cylinder (10), with a grinding track (9) fixedly installed inside the cylinder (10); the grinding chamber is used for mechanical grinding.

[0035] like Figures 1 to 10As shown, the grinding track (9) is annular and includes a plurality of bottom plates (1) with arc-shaped outer surfaces arranged horizontally in sequence. The plurality of bottom plates (1) together enclose the annular grinding track. A detachable tooth plate (2) is provided on the bottom plate (1), and a plurality of vertically arranged grinding teeth (3) are provided on the tooth plate (2). Preferably, the upper ends of the grinding teeth (3) on the tooth plate (2) are tilted outward. The angle between the grinding teeth (3) and the vertical line is 4° to 8°. In this embodiment, the angle between the grinding teeth (3) and the vertical line is 6°. This tilt angle is more conducive to the upward flow of the material after being impacted and crushed when the crushing chamber is used, reducing the formation of vortex in the crushing chamber and effectively reducing the pressure loss in the crushing chamber.

[0036] The tooth plate (2) of the grinding track is easy to wear during use and is a consumable part. When manufacturing the tooth plate (2), a wear-resistant alloy, aluminum oxide or zirconium oxide is preferably used. The wear-resistant alloy is, for example, a cast alloy.

[0037] In actual application, the number of base plates (1) is set according to the actual size of the grinding track (9). Generally, a small mechanical mill preferably uses sixteen base plates (1), and a large mechanical mill preferably uses twenty or twenty-four base plates (1). In this embodiment, the grinding track includes twenty-four base plates (1) as an example. The base plates (1) are made of ordinary carbon steel or stainless steel.

[0038] Each base plate (1) is provided with four through holes (4) running through the front and back, and the four through holes (4) are arranged at intervals. Screw holes (5) are provided at positions corresponding to the through holes (4) on the tooth plate (2), and the tooth plate (2) is fixedly mounted on the base plate (1) through the screw holes (5), the through holes (4) and the fasteners. A recessed avoidance area (8) is provided on the back of the base plate (1). Bolts are preferably used as fasteners between the base plate (1) and the tooth plate (2), and when the bolts are installed, the bolt heads are located in the avoidance area (8). The front side of the base plate (1) is a plane, and the back side of the tooth plate (2) is a plane. The tooth plate (2) is installed on the front side of the base plate (1). During installation, the contact surfaces of the tooth plate (2) and the base plate (1) are both planes, making the installation between the two more stable.

[0039] In this embodiment, the upper end of the base plate (1) is preferably provided with a first fixing portion (6) protruding upward, and the lower end is provided with a second fixing portion (7) protruding downward. The first fixing portion (6) and the second fixing portion (7) can facilitate the installation and fixation of the grinding track for the mechanical grinder when in use.

[0040] like Figure 1 and Figure 2As shown in the figures, a circular track support plate (11) is fixed on the inner wall of the cylinder (10), and the grinding track (9) is installed on the upper end of the track support plate (11). The lower end of the base plate (1) is provided with a second fixing portion (7); and the track support plate (11) is provided with a lower limit portion (12) adapted to the second fixing portion (7).

[0041] The lower limiting portion (12) is an annular limiting ring protruding upward, and the second fixing portion (7) is located outside the lower limiting portion (12). The outer diameter of the lower limiting portion (12) is adapted to the inner diameter of the second fixing portion (7).

[0042] A first fixing portion (6) is provided at the upper end of the base plate (1), and an annular pressure plate (13) is further provided on the inner side of the cylinder (10), the pressure plate (13) is located at the upper end of the grinding track (9), and an annular upper limit portion (14) is provided at the bottom of the pressure plate (13), and the first fixing portion (6) is located outside the upper limit portion (14); a flange (15) is provided at the upper end of the cylinder (10), and a detachable locking flange (16) is installed on the flange (15); the locking flange (16) presses the pressure plate (13) onto the grinding track (9) from the upper side; specifically, the outer diameter of the upper limit portion (14) is adapted to the inner diameter of the first fixing portion (6).

[0043] like Figure 1 As shown, in this embodiment, preferably, a rubber pressure ring (17) is provided between the locking flange (16) and the pressure plate (13).

[0044] In actual use, the base plate (1) only serves as a supporting structure for the tooth plate (2), and the wear of the grinding track (9) only wears the tooth plate (2). When the grinding track (9) is worn, it only needs to replace the tooth plate (2). Taking a small mechanical mill as an example, the grinding track (9) is composed of sixteen sets of base plates (1) and tooth plates (2). Each tooth plate (2) weighs 7 kilograms, and the cost of each replacement is about 300 yuan. Taking a large mechanical mill as an example, the grinding track (9) is composed of twenty-four sets of base plates (1) and tooth plates (2), and the cost of each replacement is about 13,000 yuan.

[0045] Each mill needs to be replaced at least three times per year. Annual track replacement costs for a small mill are approximately 9,000 yuan. For a large mill, this is approximately 39,000 yuan. This significantly reduces mill track replacement costs. Mill users typically use three to five mills simultaneously, or even more. This significant savings in annual track replacement costs is also substantial.

[0046] To sum up, the utility model provides a grinding track for a mechanical grinder and a crushing chamber provided with the grinding track. The grinding track is composed of multiple groups of base plates and tooth plates, which are assembled and cast in separate parts, reducing the difficulty of molding and casting; the manufacturing cost is low, saving equipment investment; and when the grinding track is worn, only the tooth plate part needs to be replaced for maintenance, so the maintenance cost is low; the structural design of the crushing chamber is reasonable, which facilitates the installation and replacement of the grinding track.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A grinding track for a mechanical grinder, the grinding track being annular, characterized in that: It comprises a plurality of bottom plates (1) arranged horizontally in sequence, wherein a detachable tooth plate (2) is provided on the bottom plate (1), and a vertically arranged grinding tooth (3) is provided on the tooth plate (2).

2. The grinding track for a mechanical grinder according to claim 1, wherein: The upper ends of the grinding teeth (3) on the tooth plate (2) are arranged to be inclined outward.

3. The grinding track for a mechanical grinder according to claim 2, wherein: The included angle between the grinding teeth (3) and the vertical line is 4° to 8°.

4. The grinding track for a mechanical grinder according to claim 2, wherein: The front side of the base plate (1) is a plane, the back side of the tooth plate (2) is a plane, and the tooth plate (2) is mounted on the front side of the base plate (1); a recessed avoidance area (8) is provided on the back side of the base plate (1).

5. The grinding track for a mechanical grinder according to any one of claims 1 to 4, characterized in that: The base plate (1) is provided with through holes (4) extending through the base plate (1), and screw holes (5) are provided on the tooth plate (2) at positions corresponding to the through holes (4). The tooth plate (2) is fixedly mounted on the base plate (1) via the screw holes (5), the through holes (4) and fasteners.

6. The grinding track for a mechanical grinder according to any one of claims 1 to 4, characterized in that: The upper end of the bottom plate (1) is provided with a first fixing portion (6), and the lower end is provided with a second fixing portion (7).

7. A crushing chamber, comprising a vertically arranged cylinder (10), characterized in that: A grinding track (9) for a mechanical grinder according to any one of claims 1 to 5 is fixedly mounted on the inner side of the cylinder (10).

8. The pulverizing chamber according to claim 7, characterized in that: An annular track support plate (11) is fixed inside the cylinder (10), and the grinding track (9) is mounted on the upper end of the track support plate (11); a second fixing portion (7) is provided at the lower end of the base plate (1); and a lower limit portion (12) adapted to the second fixing portion (7) is provided on the track support plate (11).

9. The pulverizing chamber according to claim 8, characterized in that: The lower limiting portion (12) is an upwardly protruding annular limiting ring, and the second fixing portion (7) is located outside the lower limiting portion (12).

10. The pulverizing chamber according to claim 7, wherein: The upper end of the base plate (1) is provided with a first fixing portion (6), and the inner side of the cylinder (10) is further provided with an annular pressure plate (13), which is located at the upper end of the grinding track (9), and the bottom of the pressure plate (13) is provided with an annular upper limit portion (14), and the first fixing portion (6) is located outside the upper limit portion (14); the upper end of the cylinder (10) is provided with a flange (15), and a locking flange (16) is installed on the flange (15); the locking flange (16) presses the pressure plate (13) onto the grinding track (9) from the upper side.