Material blocking device for blocking medium in sand mill

Abstract

The utility model discloses a material blocking device for blocking a medium in a sand mill, the material blocking device comprises a base ring and a filtering ring, the filtering ring comprises a plurality of bosses and a plurality of sieve plates, the bosses and the sieve plates are arranged on the base ring in the circumferential direction of the base ring in an array mode, the sieve plates are arranged between any two adjacent bosses, and the sieve plates are arranged between any two adjacent bosses. By means of the structure, the chance that grinding media are mixed into finished grinding slurry is effectively intercepted, loss of the grinding media is reduced, the grinding efficiency is improved, the bosses block the grinding media, meanwhile, the sieve plate is protected, abrasion of the grinding media to the sieve plate is reduced, and the enterprise cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of material washing and filtering, and in particular to a material blocking device for blocking a medium in a sand mill. Background Art

[0002] A sand mill is a device used to grind metal, glass, ceramic and other materials. In a sand mill, the baffle plate is a component that blocks abrasive splashes and protects the workpiece. The design and manufacture of the baffle plate need to be designed and selected according to specific process requirements, such as the type and particle size of the abrasive, the material and shape of the workpiece, etc. Reasonable baffle plate design can improve the working efficiency of the sand mill and reduce wear and damage.

[0003] When a traditional sand mill grinds raw materials, a blocking plate is arranged on the top of the dispersion plate. The blocking plate is mounted on a flange plate, and the flange plate is clamped with the rotating central axis of the sand mill. Blocking blocks are dispersedly arranged on the blocking plate. There are discharge gaps between the blocking blocks, which can easily cause the grinding medium to pass through the discharge gap and mix into the ground slurry. As the wear of the blocking plate gradually increases, the discharge gap increases and the blocking area decreases. Therefore, the loss of grinding media increases, resulting in the loss of grinding media, which reduces the grinding efficiency and increases the enterprise cost. Summary of the invention

[0004] The purpose of this application is to provide a material blocking device for blocking media in a sand mill, which solves the problem that when the blocking disc of a traditional sand mill is grinding raw materials, there is a leakage gap between the blocking blocks, which easily causes the grinding medium to pass through the leakage gap and mix into the ground slurry. As the wear of the blocking disc gradually increases, the leakage gap increases and the blocking area decreases. Therefore, the loss of grinding media increases, causing the loss of grinding media, reducing grinding efficiency, and increasing enterprise costs. To achieve the above purpose, this application discloses a specific technical solution for a material blocking device for blocking media in a sand mill as follows:

[0005] A material blocking device for blocking medium in a sand mill comprises a base ring and a filter ring, wherein the filter ring comprises a plurality of bosses and a plurality of sieve plates, wherein the plurality of bosses and the plurality of sieve plates are arranged on the base ring along a circumferential array of the base ring, and the sieve plates are arranged between any two adjacent bosses.

[0006] Preferably, the boss is provided with a plurality of filter slots, and the filter slots penetrate the boss along the radial direction of the filter ring.

[0007] Preferably, the inner ring slot width of the filtering slot is smaller than the outer ring slot width.

[0008] Preferably, the inner ring notch width of the filtering slot is 500um to 2000um.

[0009] Preferably, it further comprises an adjustment component, wherein the adjustment component is used to adjust the filter slot and the filter area of ​​the filter plate.

[0010] Preferably, the adjustment component includes a blocking ring, the bottom of the base ring is provided with an annular groove, the annular groove extends from the bottom of the base ring to the top of the filter ring, the blocking ring is lifted and lowered in the annular groove, and the blocking ring is close to the screen plate.

[0011] Preferably, the annular groove is located in the sieve plate.

[0012] Preferably, the adjustment assembly also includes an adjustment bolt, and a plurality of adjustment screw holes are provided at intervals along the annular groove at the bottom of the base ring. The adjustment bolt is cooperatively connected with the adjustment screw hole, and the adjustment bolt drives the blocking ring to rise and fall, so as to adjust the depth of the blocking ring inserted into the annular groove.

[0013] Preferably, the mesh size of the sieve plate is 18 to 325 meshes.

[0014] The technical solution adopted in this application can achieve the following beneficial effects:

[0015] The present application discloses a material blocking device for blocking medium in a sand mill, comprising a base ring and a filter ring, wherein the filter ring comprises a plurality of bosses and a plurality of sieve plates, wherein the plurality of bosses and the plurality of sieve plates are arranged on the base ring along a circumferential array of the base ring, and the sieve plate is arranged between any two adjacent bosses, thereby effectively blocking the opportunity of grinding medium mixing into the finished grinding slurry, reducing the loss of grinding medium, and improving the grinding efficiency; and while blocking the grinding medium, the boss protects the sieve plate, reducing the wear of the grinding medium on the sieve plate, and saving enterprise costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the material blocking device for blocking the medium in the sand mill.

[0017] Figure 2 This is a schematic diagram of the partial structure of a material blocking device for blocking the medium in a sand mill.

[0018] Figure 3 Schematic diagram of the barrier ring structure.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of a material blocking device for blocking the medium in a sand mill.

[0020] Among them: base ring 100, annular groove 110, adjusting screw hole 120, filter ring 200, boss 210, filter slot 211, inner ring notch 212, outer ring notch 213, sieve plate 220, adjusting assembly 300, blocking ring 310, adjusting bolt 320. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood.

[0022] It should be noted that when a device is considered to be "connected" to another device, it may be directly connected to the other device or there may be an intermediate device at the same time. The terms "inside", "top", "upper", "lower", "upper", "lower" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figures 1 to 4 The utility model is further described below in conjunction with the accompanying drawings and embodiments. The embodiment of the present application discloses a material blocking device for blocking medium in a sand mill (hereinafter referred to as the material blocking device), comprising a base ring 100 and a filter ring 200, wherein:

[0025] The filter ring 200 includes a plurality of bosses 210 and a plurality of sieve plates 220, which are arranged on the base ring 100 along the circumferential array of the base ring 100, and the sieve plates 220 are arranged between any two adjacent bosses 210. The base ring 100 and the filter ring 200 are annular structures, and the filter ring 200 and the base ring 100 can be integrated or detachable. The base ring 100 and the filter ring 200 can be provided with base rings 100 and filter rings 200 of different heights according to different grinding slurries or different grinding media to be blocked, and they can be used in combination with each other. At the same time, when any one of them is worn too much, it is not necessary to remove the entire material blocking device and replace it with a new one, and only the corresponding base ring 100 or filter ring 200 needs to be replaced. The filter ring 200 includes a plurality of bosses 210 and a plurality of sieve plates 220, which are arranged on the base ring 100 along the circumferential array of the base ring 100, and the sieve plate 220 is arranged between any two adjacent bosses 210. Since the boss 210 is thicker than the sieve plate 220 and the boss 210 is more protruding than the sieve plate 220, the sieve plate 220 is recessed between adjacent bosses 210. When the sand mill rotates, the boss 210 is subjected to a large grinding pressure, thereby indirectly protecting the sieve plate 220 and reducing the wear of the sieve plate 220. The boss 210 and the sieve plate 220 mainly play the role of intercepting the grinding medium, and can be integrated or detachably connected, and can be freely combined and used according to specific circumstances.

[0026] In specific work, for example, in the process of grinding silicon carbide (that is, the grinding slurry is small-particle silicon carbide, and the grinding medium is large-particle silicon carbide), the small-particle silicon carbide is ground into submicron or smaller silicon carbide particles. The material blocking device of the present application is installed at the top of the sand mill. After all the dispersion disks are installed, the material blocking device is installed on the flange of the upper layer of the dispersion disk. Finally, the upper cover of the sand mill is covered so that the inner side wall of the material blocking device and the flange form an inner bin. The material blocking device is used to intercept the grinding medium from entering the inner bin to prevent the grinding medium from mixing into the ground slurry of the process particle size. After the sand mill is started, the slurry in the sand mill rotates at a high speed. The ground submicron silicon carbide particles are lighter than the grinding media. During the grinding and rotation process, they will gradually flow to the middle and upper part of the sand mill with the internal circulation of the sand mill and concentrate on the central axis. The large-particle silicon carbide grinding media are heavier and rotate at a high speed. Most of them move in the middle and lower part of the sand mill and are far away from the central axis. At the same time, large-particle silicon carbide will often be thrown onto the barrel wall of the sand mill by the sand mill dispersion disk, and then rebound to continue grinding. The particle size distribution of the slurry in the sand mill is decreasing from bottom to top. The smaller and finer the particle size is, the larger and coarser the particle size is. Therefore, when the ground submicron silicon carbide particles flow to the upper part of the sand mill with the operation of the sand mill, Submicron silicon carbide particles are affected by the internal pressure of the sand mill and will enter the inner bin through the sieve plate 220, and then be guided from the inner bin to the transfer bin. However, large-particle silicon carbide grinding media cannot enter the inner bin due to the centrifugal effect and the interception of the sieve plate 220, or they collide with the boss 210 and bounce back, and as the sand mill rotates, they enter the internal circulation of the sand mill to continue grinding. Therefore, the smaller the particle size required by the enterprise, the higher the height of the base ring 100 is required. For example, when the enterprise needs 3mm silicon carbide particles, the material blocking device is just suitable. When the enterprise needs 1mm silicon carbide particles, according to the particle size distribution of silicon carbide particles in the sand mill, it is necessary to replace the material blocking device with a higher base ring 100 and a lower filter ring 200 to meet the enterprise's demand for different particle sizes.

[0027] It should be noted that, first, the flange in the sand mill is generally used to install the blocking plate. Here we only need to remove the original blocking plate and install the blocking device. The shape of the flange is circular, and the setting of the shaft hole and the key groove is the same as that of the dispersion plate. It can be clamped with the central axis of the sand mill, so that the slurry will not enter the inner bin from the bottom of the flange. The difference is that the dispersion plate can be used directly, and the flange is used to install related devices or components; second, when installing the blocking device, there is a very small gap between the upper surface of the blocking device and the upper cover of the sand mill. The gap is to prevent the blocking device from rubbing against the upper cover when rotating in the sand mill barrel and damaging the blocking device. At the same time, the particle size distribution of the slurry in the sand mill is in the height direction, from bottom to top, and the closer to the top of the sand mill, the smaller the particle size. Therefore, the grinding medium will not pass through the gap between the blocking device and the upper cover into the inner bin, affecting the particle size distribution.

[0028] The material blocking device in the present application includes a base ring 100 and a filter ring 200, wherein the filter ring 200 includes a plurality of bosses 210 and a plurality of sieve plates 220, wherein the plurality of bosses 210 and the plurality of sieve plates 220 are arranged on the base ring 100 along a circumferential array of the base ring 100, and the sieve plate 220 is arranged between any two adjacent bosses 210. During the grinding process, the filter ring formed by the spaced arrangement of the bosses 210 and the sieve plates 220 effectively intercepts the opportunity of the grinding medium mixing into the finished grinding slurry, reduces the loss of the grinding medium, and improves the grinding efficiency. Moreover, the boss 210 protects the sieve plate 220 while blocking the grinding medium, reduces the wear of the sieve plate 220 by the grinding medium, and saves enterprise costs.

[0029] Furthermore, in order to speed up the filtering speed, the boss 210 is provided with a plurality of filtering slots 211, and the filtering slots 211 penetrate the boss 210 along the radial direction of the filter ring 200. The filtering slots 211 are preferably 1 to 10 in number. During operation, due to the irregularity of the silicon carbide particles, the sieve holes of the sieve plate 220 may be clogged during the filtering process, resulting in a slow filtering speed. The passing area of ​​the filtering slots 211 is larger than the passing area of ​​the sieve holes on the sieve plate 220. Therefore, the passing speed of the filtering slots 211 is better than that of the sieve plate 220. Especially under high pressure, the ground silicon carbide slurry can quickly enter the inner bin through the filtering slots 211, making up for the defect of the slow passing speed of the sieve plate 220. The reasonable matching of the sieve plate 220 and the boss 210 can effectively improve the grinding efficiency.

[0030] It should be noted that the conventional blocking ring 310 is provided with blocking blocks at intervals, and the gaps between the blocking blocks are large, so the blocking effect on the medium is poor, and the friction force of the grinding medium on the blocking blocks during the grinding process is large, which causes the blocking blocks to wear more. However, the boss 210 and the sieve plate 220 in the present application can be detachable or integrated. When the boss 210 is provided with a filtering slot 211, the boss 210 also has a filtering effect. The filter ring 200 can be composed entirely of the sieve plate 220 or entirely of the boss 210. If the filter ring 200 is entirely composed of the sieve plate 220, the sieve plate 220 has a good blocking effect on the medium and effectively prevents the medium from entering the inner chamber. However, since the sieve plate 220 is relatively thin, the sieve plate 220 is easily worn or even worn through during the grinding process; if the filter ring 200 is entirely composed of the boss 210 with the filter slot 211, the blocking effect of the boss 210 on the medium is poorer than that of the sieve plate. However, since the boss 210 is relatively thick, the wear of the boss 210 is lower during the grinding process; in the present application, the filter ring 200 is arranged with the boss 210 and the sieve plate 220 at intervals and connected into a ring shape, which can effectively block the grinding medium from entering the inner chamber and reduce the wear on the sieve plate 220, thereby increasing the service life of the filter ring 200.

[0031] Furthermore, in order to improve the filtering efficiency, the width of the inner ring slot 212 of the filtering slot 211 is smaller than the width of the outer ring slot 213. The filtering slot 211 is wide outside and narrow inside, the slot near the center of the material blocking device is the inner ring slot 212, and the slot far from the center is the outer ring slot 213. The width of the inner ring slot 212 of the filtering slot 211 is preferably 500um to 2000um, and the width ratio of the inner ring slot 212 to the outer ring slot 213 of the filtering slot 211 is 1: (1.2 to 2). The filtering slot 211 forms a trapezoidal shape with narrow inside and wide outside. Compared with the rectangular filtering slot 211, the trapezoidal filtering slot 211 is easier for small particles of slurry to enter. The trapezoidal filtering slot 211 can make the grinding medium be ejected when it collides with the inner wall of the filtering slot 211, and the particles with small particle size have less collision force and are easier to enter, thereby effectively preventing the grinding medium from entering the inner bin.

[0032] Furthermore, in order to optimize the material blocking device, an adjustment component 300 is also included, and the adjustment component 300 is used to adjust the filtering area of ​​the filtering slot 211 and the sieve plate 220. In actual work, in order to cooperate with the grinding of different slurries, the grinding media of which are of different sizes, it is necessary to make a material blocking device with base rings 100 and filter rings 200 of different heights, which increases the cost of the enterprise. In order to save costs and make one material blocking device suitable for grinding different slurries, an adjustment component 300 is set on the material blocking device to adjust the height ratio of the base ring 100 and the filter ring 200, that is, to adjust the passing area of ​​the filtering slot 211 and the sieve plate 220.

[0033] Furthermore, in order to adapt to different sizes of grinding media, the adjustment assembly 300 includes a blocking ring 310. An annular groove 110 is provided at the bottom of the base ring 100. The annular groove 110 extends from the bottom of the base ring 100 to the top of the filter ring. The blocking ring 310 is lifted and lowered in the annular groove 110, and the blocking ring 310 is close to the sieve plate 220. The annular groove 110 is provided at the bottom of the base ring 100, and the depth of the annular groove 110 is greater than the height of the base ring 100, but does not exceed the height of the material blocking device. The setting of the blocking ring 310 is mainly to adapt to different sizes of grinding media or different particle sizes of materials, and the height requirements of the base ring 100 are different. The blocking ring 310 is used to adjust the height of the base ring 100, and the blocking ring 310 can be inserted into the annular groove 110 close to the sieve plate 220. The side of the sieve plate 220 close to the center of the material blocking device is the inner ring wall of the sieve plate 220, and the side away from the center is the outer ring wall of the sieve plate 220. The annular groove 110 can be set close to the inner ring wall of the sieve plate 220, or it can be set close to the outer ring wall of the sieve plate 220. If the annular groove 110 is set on the outer ring wall of the sieve plate 220, the blocking ring 310 is easily worn and impacted by the slurry during operation, and may be deformed during the grinding process, causing the grinding medium to flow into the inner bin; if the annular groove 110 is set on the inner ring wall of the sieve plate 220, the blocking ring 310 is easily impacted by the slurry during operation and deformed, causing the grinding medium to flow into the inner bin.

[0034] Further, in order to increase the service life of the blocking ring 310, the annular groove 110 is located in the sieve plate 220. The annular groove 110 is preferably arranged between the inner annular wall and the outer annular wall of the sieve plate 220, that is, the annular groove 110 is arranged in alignment with the sieve plate 220, the depth of the annular groove 110 extends into the sieve plate 220, and the width of the annular groove 110 is less than the thickness of the sieve plate 220, the blocking ring 310 can just be inserted into the annular groove 110, and the blocking ring 310 and the annular groove 110 are in clearance fit. When the annular groove 110 is arranged in the sieve plate 220, the sieve plate 220 clamps the blocking ring 310 front and back, the blocking ring 310 is not easily deformed, and is not easily worn by the slurry, thereby increasing the service life of the blocking ring 310.

[0035] In actual work, the smaller the particle size of the grinding medium, the higher the required height of the base ring 100, and the blocking ring 310 can increase the height of the base ring 100 without replacing the blocking device. It is only necessary to embed the blocking rings 310 of different heights into the annular groove 110 to adjust the height of the base ring 100, thereby achieving the purpose of intercepting the grinding medium.

[0036] Furthermore, in order to facilitate the adjustment of the blocking height of the blocking ring 310, the adjustment assembly 300 also includes an adjusting bolt 320. A plurality of adjusting screw holes 120 are arranged at intervals along the annular groove 110 at the bottom of the base ring 100. The adjusting bolt 320 is cooperatively connected with the adjusting screw hole 120. The adjusting bolt 320 drives the blocking ring 310 to rise and fall, so as to adjust the depth of the blocking ring 310 inserted into the annular groove 110. Among them, adjusting bolts 320 of different lengths can adjust the depth of the blocking ring 310 embedded in the annular groove 110. The purpose of selecting bolts of different lengths is to tighten the bolts to prevent the bolts from loosening during rotation and damaging the sand mill after falling off. When the adjusting bolts 320 are screwed into the screw holes, they can just support the blocking ring 310 and give the blocking ring 310 a supporting force. When assembling the material blocking device, first embed the blocking ring 310 into the annular groove 110, and then install the flange. The screw holes on the flange are aligned with the screw holes at the bottom of the base ring 100, and then screw on the adjusting bolts 320, tighten the adjusting bolts 320, and finally install it into the sand mill.

[0037] It should be noted that, firstly, when the material retaining device does not have a blocking ring 310, the adjusting bolt 320 is mainly used for connecting the material retaining device with the flange. When the material retaining device is provided with a blocking ring 310, the adjusting bolt 320 has the following functions: first, it connects the material retaining device with the flange and plays a connecting role; second, it provides a supporting force for the blocking ring 310 and plays a role in adjusting the blocking ring 310. Secondly, in order to adapt to the requirements of different grinding media for the material retaining device, generally, the height of the base ring 100 is greater than the height of the filter ring 200, and the height of the blocking ring 310 is less than the height of the base ring 100, which helps to adjust the blocking ring 310, reduces the cost of replacing the base ring 100, and can flexibly adjust the blocking ring 310 for different media without the need to make multiple base rings 100 to match different grinding media.

[0038] Specifically, in order to control the particle size of particles entering the material blocking device, the mesh number of the sieve plate 220 is 18-325 mesh, wherein the aperture of the sieve plate 220 is smaller than the particle size of the grinding medium, and the aperture on the sieve plate 220 is 50um to 1000um, corresponding to the mesh number of the sieve plate 220 of 18-325 mesh. Depending on the grinding medium, the aperture size of the sieve plate 220 can be adjusted according to the needs of the enterprise. Because the silicon carbide particles are irregular in shape, the aperture of the sieve plate 220 can ensure that particles within a certain range enter the inner bin, so that the obtained process particle size distribution is uniform. The sieve plates 220 are preferably 2 to 20.

[0039] In summary, the blocking device in the present application is used to effectively block the chance of the grinding medium mixing into the ground slurry by setting the base ring 100 and the filter ring 200, and taking into account the difference in grinding media, the blocking ring 310 can be adjusted according to different situations to control the height ratio of the base ring 100 and the filter ring 200, thereby blocking the grinding medium from entering the inner bin and mixing into the process particle size slurry, thereby obtaining a slurry with a relatively uniform particle size distribution; and the boss 210 and the screen plate 220 are spaced apart and connected in a ring shape, which increases the interception rate of the grinding medium and reduces the wear rate of the blocking device, thereby saving costs for the enterprise and improving grinding efficiency.

[0040] The above-described embodiments only express the way of equipment layout of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application; it should be pointed out that for ordinary technicians in this field, several adjustments and improvements can be made without departing from the concept of the present application, which all belong to the scope of protection of the present application; therefore, the scope of protection of the patent of this application shall be based on the attached claims.

Claims

1. A material blocking device for blocking medium in a sand mill, characterized in that: It comprises a base ring and a filter ring, wherein the filter ring comprises a plurality of bosses and a plurality of sieve plates, wherein the plurality of bosses and the plurality of sieve plates are arranged on the base ring along a circumferential array of the base ring, and the sieve plates are arranged between any two adjacent bosses.

2. The material blocking device for blocking medium in a sand mill according to claim 1, characterized in that: The boss is provided with a plurality of filter slots, and the filter slots penetrate the boss along the radial direction of the filter ring.

3. The material blocking device for blocking medium in a sand mill according to claim 2, characterized in that: The inner ring slot width of the filtering slot is smaller than the outer ring slot width.

4. The material blocking device for blocking medium in a sand mill according to claim 3, characterized in that: The inner ring notch width of the filtering slot is 500um to 2000um.

5. The material blocking device for blocking medium in a sand mill according to claim 2, characterized in that: Also included is an adjustment assembly for adjusting the filter slot and the filter area of ​​the filter plate.

6. The material blocking device for blocking medium in a sand mill according to claim 5, characterized in that: The adjustment component includes a blocking ring, the bottom of the base ring is provided with an annular groove, the annular groove extends from the bottom of the base ring to the top of the filter ring, the blocking ring is lifted and lowered in the annular groove, and the blocking ring is close to the screen plate.

7. The material blocking device for blocking medium in a sand mill according to claim 6, characterized in that: The annular groove is located in the sieve plate.

8. The material blocking device for blocking medium in a sand mill according to claim 6, characterized in that: The adjustment assembly also includes an adjustment bolt. A plurality of adjustment screw holes are spaced apart at the bottom of the base ring along the annular groove. The adjustment bolt is cooperatively connected with the adjustment screw holes. The adjustment bolt drives the blocking ring to rise and fall, so as to adjust the depth of the blocking ring inserted into the annular groove.

9. The material blocking device for blocking medium in a sand mill according to claim 1, characterized in that: The mesh number of the sieve plate is 18 to 325 meshes.

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