A shredder

Abstract

The utility model discloses a kind of pulverizers, including pulverizing shell, two pulverizing rollers, several tungsten steel bushings;The pulverizing shell is equipped with pulverizing cavity;Two described pulverizing rollers pass through the pulverizing shell and pass through the pulverizing cavity, two described pulverizing rollers with the rotatable assembly of the pulverizing shell, the corresponding position of two described pulverizing rollers with the pulverizing cavity is rotated and rolled quartz sand;The tungsten steel bushing sets the inner wall of the pulverizing cavity.Through the inner wall of pulverizing cavity setting tungsten steel bushing, utilize the high hardness and wear resistance of tungsten steel material, effectively solve the problem that pulverizer inner wall is easy to wear in semiconductor pulverizing quartz sand process, significantly prolong the service life of pulverizer, so that pulverizer can long-term stable operation in semiconductor pulverizing quartz sand process.

Description

Technical Field

[0001] This utility model relates to the technical field of crushing equipment, and more particularly to a crusher for crushing quartz sand. Background Technology

[0002] With the rapid development of the semiconductor industry, quartz sand, as a crucial raw material in semiconductor manufacturing, directly impacts the performance of semiconductor products through its processing quality. Crushing quartz sand is a critical step in semiconductor material processing, requiring specialized crushing equipment. Currently, common crushers on the market mainly consist of a crushing shell, crushing rollers, and related drive devices, using rotating crushing rollers to crush and grind materials.

[0003] However, existing pulverizers have significant limitations when processing high-hardness materials such as silica sand. Silica sand has a Mohs hardness of 7 and exhibits extremely strong abrasiveness, causing severe wear to the inner wall of the pulverizer during the pulverization process. This is particularly problematic in the semiconductor material processing field, where extremely high precision and purity are required. Wear on the inner wall of the pulverizing chamber not only shortens the equipment's lifespan but also contaminates the silica sand with impurities generated during wear, affecting the purity and performance of the semiconductor materials.

[0004] Existing crushers typically use ordinary metal materials for the inner wall of the crushing chamber. These materials are prone to wear during prolonged contact with high-hardness silica sand, requiring frequent replacement or repair, increasing production costs and downtime. Although some crushers use wear-resistant materials for surface treatment, due to unreasonable structural design and unstable fixing methods for wear-resistant parts, they are prone to loosening or falling off under high-intensity working conditions, affecting crushing efficiency and equipment safety.

[0005] Therefore, there is an urgent need for a pulverizer specifically designed for high-hardness materials such as quartz sand, which can effectively solve the problem of wear on the inner wall of the pulverizing chamber, extend the service life of the equipment, and at the same time ensure the purity and quality of the pulverized products to meet the high standards required for semiconductor material processing. Utility Model Content

[0006] In order to solve the technical problem of wear on the inner wall of the crushing chamber in existing crushers, one of the objectives of this utility model is to provide a crusher.

[0007] One of the objectives of this utility model is achieved through the following technical solution: A pulverizer includes a pulverizing shell, two pulverizing rollers, and several tungsten steel bushings; the pulverizing shell has a pulverizing chamber; the two pulverizing rollers pass through the pulverizing shell and through the pulverizing chamber, the two pulverizing rollers are rotatably assembled with the pulverizing shell, and the two pulverizing rollers rotate and crush quartz sand at positions corresponding to the pulverizing chamber; the tungsten steel bushings are provided on the inner wall of the pulverizing chamber.

[0008] Preferably, the crushing shell includes two interlocking half-shells, each half-shell having two interconnected half-roller cavities; the two half-shells are interlocked to form the crushing shell, the half-roller cavities are interlocked in pairs to form a roller cavity, the crushing cavity includes two roller cavities; two crushing rollers pass through the two roller cavities respectively.

[0009] Preferably, the inner wall of the half-roll cavity is provided with the tungsten steel bushing, one side of the tungsten steel bushing extends to the position between the two roller cavities, and the other side of the tungsten steel bushing extends to the side corresponding to the half-shell.

[0010] Preferably, the crusher further includes an assembly strip, which is disposed on the inner wall of the half-shell and located in the middle of the two half-roller cavities, for simultaneously locking the tungsten steel bushing on the side near the middle.

[0011] Preferably, the assembly strip has a bottom surface and locking ramps on both sides. The bottom surface is a plane that abuts against the half shell during assembly. The end of the locking ramp away from the bottom surface is tilted outward. The side of the tungsten carbide bushing abuts against the locking ramp.

[0012] Preferably, the two sides of the assembly strip are also provided with arc surfaces that are adapted to the inner wall of the tungsten steel bushing.

[0013] Preferably, the assembly strip is made of tungsten carbide; or, the arc surface of the assembly strip is provided with a tungsten carbide reinforcing layer.

[0014] Preferably, the crusher further includes a locking strip for locking the assembly strip, wherein a portion of the locking strip is connected to the interior of the half-shell and another portion is connected to the assembly strip.

[0015] Preferably, the bottom surface of the assembly strip is provided with a dovetail groove extending along its length; the cross-sectional shape of the locking strip is adapted to the dovetail groove, and the locking strip is embedded in the dovetail groove.

[0016] Preferably, the crusher further includes a fastening screw that extends into the half-shell from the surface of the half-shell through a position between the two half-roller cavities, and one end of the fastening screw extending into the half-shell is connected to the locking strip.

[0017] Preferably, the crusher further includes a fixing block, which is disposed on the side of the half shell. The first end of the fixing block is fixedly connected to the half shell, and the second end of the fixing block extends towards the half roller cavity. The second end of the fixing block abuts against the side of the tungsten steel bushing.

[0018] Preferably, the fixing block is made of tungsten carbide; or, the end face of the second end of the fixing block is provided with a tungsten carbide reinforcing layer.

[0019] The beneficial effects of this invention are as follows: by installing a tungsten carbide bushing on the inner wall of the crushing chamber, the high hardness and wear resistance of tungsten carbide effectively solve the problem of easy wear on the inner wall of the crusher in the semiconductor quartz sand crushing process, significantly extending the service life of the crusher. Simultaneously, the crusher structure of this invention is rationally designed, and the installation method of the tungsten carbide bushing facilitates replacement and maintenance. The combined use of assembly strips and locking strips ensures the stable installation of the tungsten carbide bushing, further improving the overall durability and working efficiency of the crusher. Furthermore, the use of tungsten carbide material or the installation of a tungsten carbide reinforcing layer in key parts further enhances the wear resistance of the crusher under high-intensity working environments, enabling the crusher to operate stably for a long time in the semiconductor quartz sand crushing process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the pulverizer of this utility model; Figure 2 This is a structural diagram of the half-shell and related assembly structure in the crusher of this utility model; Figure 3 This is a schematic diagram of the structure of the half-shell in the pulverizer of this utility model; Figure 4 This is a partially enlarged schematic diagram of the area where the assembly strip is located in the pulverizer of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the assembly bar in the pulverizer of this utility model.

[0021] Explanation of reference numerals in the attached diagram: 1. Crushing shell; 11. Half shell; 12. Half roller cavity; 2. Crushing roller; 3. Tungsten carbide bushing; 4. Assembly strip; 41. Bottom surface; 42. Locking bevel; 43. Curved surface; 44. Dovetail groove; 5. Locking strip; 6. Fixing block. Detailed Implementation

[0022] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 5 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0025] like Figure 1-3 The pulverizer shown includes a pulverizing shell 1, two pulverizing rollers 2, and several tungsten carbide bushings 3. The pulverizing shell 1 has a pulverizing chamber. The two pulverizing rollers 2 pass through the pulverizing shell 1 and the pulverizing chamber, and are rotatably assembled with the pulverizing shell 1. The two pulverizing rollers 2 rotate and crush quartz sand at positions corresponding to the pulverizing chamber. The tungsten carbide bushings 3 are disposed on the inner wall of the pulverizing chamber.

[0026] In this invention, the steel inner wall of the traditional crushing chamber is replaced with a tungsten carbide bushing 3. Tungsten carbide, also known as cemented carbide, has extremely high hardness and wear resistance. By introducing the tungsten carbide bushing 3, when dealing with high-hardness abrasives, such as quartz sand, the wear rate of the tungsten carbide bushing 3 is much lower than that of the traditional high-manganese steel liner, thereby extending the service life of the crusher several times over, reducing downtime caused by liner replacement, and lowering overall production costs.

[0027] In some embodiments of the crushing shell 1, such as Figure 1 , Figure 2As shown, the crushing shell 1 comprises two interlocking half-shells 11, each half-shell 11 containing two interconnected semi-roller cavities 12. The two half-shells 11 interlock to form the crushing shell 1, and the semi-roller cavities 12 interlock in pairs to form roller cavities, thus the crushing chamber includes two roller cavities. Two crushing rollers 2 pass through the two roller cavities respectively. This utility model optimizes the design of the crushing shell 1, which is formed by two separable half-shells 11 fastened together with bolts. Each half-shell 11 has two pre-fabricated semi-roller cavities 12, which, when fastened together, form two complete roller cavities. This breaks down a complex, integrated, closed structure into two symmetrical, open, simple structures. When it is necessary to replace the internal tungsten steel bushing 3 or repair the crushing rollers 2, there is no need for large-scale disassembly of the entire device; simply loosening the bolts connecting the two half-shells 11 allows the crusher to be fully opened, revealing all internal components, greatly facilitating maintenance and saving manpower and time. This structural design also allows the crushing shell 1 to be easily disassembled, facilitating maintenance and cleaning.

[0028] The inner wall of the half-roller cavity 12 is provided with a tungsten carbide bushing 3. One side of the tungsten carbide bushing 3 extends to the position between the two roller cavities, and the other side of the tungsten carbide bushing 3 extends to the side of the corresponding half-shell 11. The tungsten carbide bushing 3 can cover a large area of ​​the inner wall of the crusher, ensuring that all shell surfaces that may come into contact with the material are covered with wear-resistant material along the entire material flow path, from the feed side to the central junction of the two roller cavities.

[0029] like Figure 2 , Figure 4 As shown, the pulverizer also includes an assembly strip 4, which is disposed on the inner wall of the half-shell 11 and located in the middle of the two half-roller cavities 12, for simultaneously locking the tungsten carbide bushing 3 on the side near the middle. The design of the assembly strip 4 allows the tungsten carbide bushing 3 to be firmly fixed inside the half-shell 11, preventing it from loosening due to vibration during the pulverization process.

[0030] like Figure 4 , Figure 5 As shown, the assembly strip 4 has a bottom surface 41 and locking ramps 42 on both sides. The bottom surface 41 is the plane that abuts against the half-shell 11 during assembly. The end of the locking ramp 42 away from the bottom surface 41 is tilted outward. The side of the tungsten carbide bushing 3 abuts against the locking ramp 42. The locking ramps 42 on both sides of the assembly strip 4 form a wedge-shaped structure. When the assembly strip 4 is pressed in, it can squeeze the tungsten carbide bushing 3 outward, ensuring that the tungsten carbide bushing 3 fits tightly against the inner wall of the half-shell 11 and eliminating gaps.

[0031] like Figure 4 , Figure 5 As shown, the two sides of the assembly strip 4 are also provided with arc surfaces 43 that are adapted to the inner wall of the tungsten carbide bushing 3. These arc surfaces 43 ensure that the contact area between the assembly strip 4 and the tungsten carbide bushing 3 is maximized, which improves the locking effect and reduces local stress concentration, preventing the tungsten carbide bushing 3 from cracking under high pressure.

[0032] In a preferred embodiment, the assembly strip 4 is made of tungsten carbide. In another preferred embodiment, the arc surface 43 of the assembly strip 4 is provided with a tungsten carbide reinforcing layer. Regardless of the method used, it can be ensured that the assembly strip 4 has hardness and wear resistance matching that of the tungsten carbide bushing 3, avoiding premature wear due to material hardness mismatch.

[0033] like Figure 2 , Figure 4 As shown, the crusher also includes a locking strip 5 for locking the assembly strip 4. One part of the locking strip 5 is connected to the interior of the half-shell 11, and the other part is connected to the assembly strip 4. The function of the locking strip 5 is to further fix the assembly strip 4 and prevent it from loosening due to vibration during the operation of the crusher.

[0034] like Figure 4 , Figure 5 As shown, the bottom surface 41 of the assembly strip 4 is provided with a dovetail groove 44 extending along its length; the cross-sectional shape of the locking strip 5 is adapted to the dovetail groove 44, and the locking strip 5 is embedded in the dovetail groove 44. The dovetail groove 44 structure provides a larger contact area and a better locking effect, while preventing the assembly strip 4 from shifting in any direction.

[0035] The crusher also includes fastening screws that extend from the surface of the half-shell 11 through the space between the two half-roller cavities 12 into the half-shell 11. One end of the fastening screw extending into the half-shell 11 is connected to the locking strip 5. The position and pressure of the locking strip 5 can be adjusted from outside the crusher using the fastening screws, facilitating installation and maintenance.

[0036] like Figure 1 , Figure 2 As shown, the crusher also includes a fixing block 6, which is disposed on the side of the half-shell 11. The first end of the fixing block 6 is fixedly connected to the half-shell 11, and the second end of the fixing block 6 extends toward the half-roller cavity 12, abutting against the side of the tungsten steel bushing 3. The function of the fixing block 6 is to fix the tungsten steel bushing 3 from the side and prevent the bushing from shifting axially.

[0037] In a preferred embodiment, the fixing block 6 is made of tungsten carbide. In another preferred embodiment, the end face of the second end of the fixing block 6 is provided with a tungsten carbide reinforcing layer. Both designs ensure that the part of the fixing block 6 in contact with the tungsten carbide bushing 3 has sufficient hardness and wear resistance, thus extending the service life of the fixing block 6.

[0038] During operation, the two crushing rollers 2 rotate in opposite directions, drawing hard materials such as quartz sand into the roller cavity for crushing. A tungsten carbide bushing 3 protects the inner wall of the crushing shell 1 from wear. The assembly strip 4, locking strip 5, and fixing block 6 work together to ensure the tungsten carbide bushing 3 is firmly fixed inside the crushing shell 1. This design not only improves the durability of the crusher but also facilitates maintenance and replacement of worn parts, significantly extending the crusher's service life.

[0039] In summary, this utility model has the following characteristics.

[0040] It has excellent wear resistance. Through the tungsten carbide bushing 3, the assembly strip 4 and the fixing block 6, the core contact surface is protected by ultra-high hardness tungsten carbide material.

[0041] Easy to maintain, the split design of the crusher shell makes it simple and quick to replace the core wear-resistant components.

[0042] The tungsten steel bushing 3 is assembled in a robust and reliable manner. The combination of central inclined locking and side clamping, along with the dovetail groove 44 structure to prevent loosening, ensures the structural integrity of the equipment under long-term high-intensity vibration.

[0043] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A shredder characterized by, Includes a crushing shell, two crushing rollers, and several tungsten carbide bushings; The crushing shell is provided with a crushing chamber; The two crushing rollers pass through the crushing shell and the crushing chamber. The two crushing rollers are rotatably assembled with the crushing shell. The positions on the two crushing rollers corresponding to the crushing chamber rotate and crush the quartz sand. The tungsten carbide bushing forms the inner wall of the crushing chamber.

2. The comminutor of claim 1, wherein, The crushing shell includes two interlocking half-shells, and each half-shell has two interconnected half-roller cavities. The two half-shells are fastened together to form the crushing shell, and the two half-roller cavities are fastened together to form a roller cavity, and the crushing cavity includes two roller cavities; The two crushing rollers pass through the two roller cavities respectively.

3. The comminutor of claim 2, wherein, The inner wall of the half-roll cavity is provided with the tungsten steel bushing. One side of the tungsten steel bushing extends to the position between the two roller cavities, and the other side of the tungsten steel bushing extends to the side corresponding to the half-shell.

4. The comminutor of claim 3, wherein The crusher also includes an assembly bar, which is disposed on the inner wall of the half shell and located in the middle of the two half roller cavities, for simultaneously locking the side of the tungsten steel bushing near the middle.

5. The pulverizer as described in claim 4, characterized in that, The assembly strip has a bottom surface and locking ramps on both sides. The bottom surface is a plane that abuts against the half shell during assembly. The end of the locking ramp that is away from the bottom surface is tilted outward. The side of the tungsten carbide bushing abuts against the locking bevel.

6. The pulverizer as described in claim 5, characterized in that, The assembly strip also has curved surfaces on both sides that are adapted to the inner wall of the tungsten steel bushing.

7. The pulverizer as described in claim 6, characterized in that, The assembly strip is made of tungsten steel; or... The arc surface of the assembly strip is provided with a tungsten steel reinforcement layer.

8. The pulverizer as described in claim 4, characterized in that, The crusher also includes a locking strip for locking the assembly strip, a portion of which is connected to the interior of the half-shell and another portion of which is connected to the assembly strip.

9. The pulverizer as described in claim 8, characterized in that, The bottom surface of the assembly strip is provided with a dovetail groove extending along its length. The cross-sectional shape of the locking strip is adapted to the dovetail groove, and the locking strip is embedded in the dovetail groove.

10. The pulverizer as described in claim 2, characterized in that, The crusher also includes a fixing block, which is disposed on the side of the half shell. The first end of the fixing block is fixedly connected to the half shell, and the second end of the fixing block extends towards the half roller cavity. The second end of the fixing block abuts against the side of the tungsten steel bushing.

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