CN113171850A

CN113171850A - Dry sand mill

Info

Publication number: CN113171850A
Application number: CN202110333198.5A
Authority: CN
Inventors: 周德发; 莫铭伟; 蒋玉杰
Original assignee: Changzhou Longxin Intelligent Equipment Co ltd
Current assignee: Changzhou Longxin Intelligent Equipment Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-07-27

Abstract

The invention relates to a dry sand mill, which comprises an inner cylinder body and a main shaft, wherein the inner cylinder body and the main shaft form a grinding cavity, the grinding cavity comprises a pre-grinding cavity, a fine grinding cavity and a fine grinding cavity, stirring blades which are distributed on the main shaft in the pre-grinding cavity at intervals in the circumferential direction around the main shaft to form an axial spiral structure and feed materials to the fine grinding cavity are arranged on the main shaft in the pre-grinding cavity, and grinding blades which are arranged in pairs along the axial direction of the main shaft and feed materials to a discharge pipe are arranged on the main shaft in the fine grinding cavity and the fine grinding cavity. The grinding cavity of the sand mill is divided into a pre-grinding cavity, a fine grinding cavity and a fine grinding cavity, the mixture of the materials and the grinding medium is driven to move at a relatively high speed by the stirring blade and the grinding blade, so that the grinding treatment of the materials is realized.

Description

Dry sand mill

Technical Field

The invention relates to the technical field of material grinding, in particular to a dry sand mill.

Background

The sand mill is the most widely and most advanced grinding equipment with the highest efficiency for the materials at present. The traditional horizontal sand mill mostly adopts wet grinding, and a rotary main shaft in an inner cylinder body of the sand mill is provided with a grinding rotor formed by a plurality of layers of discs. During grinding, the main shaft drives the rotating disc to rotate, the grinding medium is driven by the rotating disc to grind and press the materials after water is added, and the ground materials are filtered and then dried to obtain a final product.

The traditional wet sand mill has the defects that the corresponding operation process is complicated due to more matched equipment, so that the grinding efficiency is not high, and the fineness of the ground material is difficult to meet the grinding requirements of a series of new materials such as lithium battery materials.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides the dry sand mill which can simplify the process and improve the grinding fineness of materials.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a dry-type sand mill, has the interior barrel that constitutes the grinding chamber, traverses interior barrel center and is provided with the main shaft, and interior barrel rear end periphery wall is connected with the inlet pipe, and the discharging pipe is installed to the terminal surface before the interior barrel, the grinding chamber including grind chamber, fine grinding chamber and correct grinding chamber in advance, install on the main shaft of grind intracavity in advance and surround main shaft circumference interval distribution and form axial helical structure and to the stirring vane of fine grinding chamber pay-off, install on the main shaft of fine grinding chamber and correct grinding intracavity and set up in pairs along main shaft axial interval and to the grinding vane of discharging pipe direction pay-off, it is perpendicular to every grinding vane for the space between the main shaft axis symmetry setting and the adjacent two pairs of grinding vanes, install the filter screen between correct grinding chamber and the discharging pipe.

Furthermore, a rotor sleeve is arranged on the main shaft, and the stirring blade and the grinding blade penetrate through the rotor sleeve and are fixedly connected with the main shaft.

Specifically, the stirring blade comprises a sector block and a connecting block which are of an integral structure, and the connecting block radially penetrates through the rotor sleeve to be fixedly connected with the main shaft, so that the sector block is obliquely arranged on the periphery of the rotor sleeve.

Specifically, the grinding blade comprises a rectangular block and a fixed block which are integrated, and the fixed block radially penetrates through the rotor sleeve to be fixedly connected with the periphery of the main shaft, so that the rectangular block is arranged on the rotor sleeve in a skewed feeding direction.

In order to increase the contact surface of the grinding blade with the material and the grinding medium, the upper end face of the rectangular block is provided with a chamfer face which inclines from the center of the rectangular block to one side edge of the rectangular block.

Meanwhile, the rotor sleeve is provided with separating discs at intervals in the axial direction, the separating discs are located between the grinding blades, through holes are formed in the peripheral edge of each separating disc in a circumferential and uniform distribution mode, materials can be conveyed through the through holes, and meanwhile the grinding effect of the grinding medium on the materials can be improved.

In order to improve the dispersibility of the material during discharging, the front end face of the main shaft close to the filter screen is provided with a stirring rod, and the stirring rod is fixedly connected with the main shaft in the radial direction.

The upper end surface of the discharge pipe is provided with a drying filter for absorbing water vapor existing in the grinding cavity; the dustproof cover plate is fixed on the front end face of the discharge pipe, and the filter screen can be conveniently replaced when the dustproof cover plate is detached.

The bearing base is installed at the rear end of the inner barrel, a bearing for supporting the main shaft is installed on the bearing base, and the inner barrel is fixed between the bearing base and the discharge pipe.

For improving the leakproofness of grinding the chamber, be located the barrel periphery and install outer barrel, outer barrel both ends are fixed with bearing base, discharging pipe respectively, the inlet pipe pass outer barrel and link firmly with interior barrel.

The invention has the beneficial effects that: the grinding cavity of the sand mill is divided into a pre-grinding cavity, a fine grinding cavity and a fine grinding cavity, the mixture of the materials and the grinding medium is driven to move at a relatively high speed by the stirring blade and the grinding blade, so that the grinding treatment of the materials is realized.

Drawings

The invention is further described with reference to the following figures and embodiments.

Fig. 1 is a schematic structural diagram of the external form of the invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

Fig. 3 is a schematic view of the internal structure of the grinding chamber according to the present invention.

Fig. 4 is a schematic view of the internal structure of the refining chamber according to the present invention.

FIG. 5 is a schematic view of the structure of the stirring vane of the present invention.

Fig. 6 is a schematic view of the structure of the abrasive blade of the present invention.

In the figure: 1. the novel grinding machine comprises a base, 2 parts of a bearing base, 3 parts of an inner cylinder, 4 parts of a main shaft, 5 parts of a rotor sleeve, 6 parts of a feeding pipe, 7 parts of a discharging pipe, 8 parts of an outer cylinder, 9 parts of a pre-grinding cavity, 10 parts of a fine grinding cavity, 11 parts of a fine grinding cavity, 12 parts of stirring blades, 12-1 parts of fan-shaped blocks, 12-2 parts of connecting blocks, 13 parts of grinding blades, 13-1 parts of rectangular blocks, 13-2 parts of fixed blocks, 13-3 parts of inclined planes, 14 parts of separating discs, 14-1 parts of through holes, 15 parts of separating plates, 16 parts of filter screens, 17 parts of stirring rods, 18 parts of drying filters, 19 parts of dust cover plates and 20 parts of protective housings.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1 to 4, the dry type sand mill comprises a base 1, a bearing base 2 with a bearing arranged therein is arranged at the rear end of the base 1, a protective cover 20 is arranged on the bearing base 2, an inner cylinder 3 forming a grinding chamber is arranged at the front end of the base 1, a main shaft 4 supported by the bearing and rotating is arranged across the center of the inner cylinder 3, and a rotor sleeve 5 is arranged on the main shaft 4.

3 rear end periphery walls of interior barrel radially are connected with

inlet pipe

6, 6 upper ends of inlet pipe have two feed inlets, add respectively and treat the material and the grinding medium that grind, and the terminal surface is installed discharging pipe 7 before being located

interior barrel

3, and 3 peripheries of barrel install outer barrel 8 in being located, and 8 both ends of outer barrel are fixed with bearing base 2, discharging pipe 7 through the flange respectively, 3 both ends of interior barrel are fixed respectively on the flange at 8 both ends of outer barrel through the flange, inlet pipe 6 pass outer barrel 8 and link firmly with interior barrel 3.

The grinding chamber include grind chamber 9 in advance, fine grinding chamber 10 and correct grinding chamber 11, inlet pipe 6 is connected in the outer wall of the inner tube body 3 at grind chamber 9 place in advance, install stirring vane 12 on the main shaft 4 in grind chamber 9 in advance, stirring vane 12 pass rotor cover 5 and main shaft 4 rigid coupling.

Specifically, as shown in fig. 5, the stirring blade 12 includes a sector 12-1 and a connecting block 12-2, which are integrally formed, the connecting block 12-2 radially penetrates through the rotor sleeve 5 to be fixedly connected with the main shaft 4, so that the sector 12-1 is obliquely arranged on the periphery of the rotor sleeve 5, the sector 12-1 is circumferentially distributed around the main shaft 4 at intervals to form an axial spiral structure, so as to feed the pre-ground material in the pre-grinding cavity 9 to the fine grinding cavity 10, and because gaps exist between the sectors 12-1 of each stirring blade 12, when a mixture of the material and the grinding medium rotating at a high speed in the pre-grinding process passes through the gaps, the mixture can be more contacted with the sector 12-1, so that solid particles of the material are effectively dispersed, sheared and ground.

The main shaft 4 positioned in the fine grinding chamber 10 and the fine grinding chamber 11 is provided with grinding blades 13 which are arranged in pairs along the axial direction of the main shaft 4 and feed the materials to the material discharging pipe 7, each pair of grinding blades 13 is symmetrically arranged relative to the axis of the main shaft 4, and the space between every two adjacent pairs of grinding blades 13 is vertical.

As shown in fig. 6, the grinding blade 13 includes a rectangular block 13-1 and a fixed block 13-2, wherein the fixed block 13-2 radially penetrates through the rotor sleeve 5 to be fixedly connected with the main shaft 4, and the rectangular block 13-1 is disposed on the rotor sleeve 5 in a crisscross manner in a skewed feeding direction. The upper end face of the rectangular block 13-1 is provided with a chamfer 13-3 which inclines from the center of the rectangular block 13-1 to the edge of one side of the rectangular block 13-1, and the chamfer 13-3 on the upper end face of each pair of the rectangular blocks 13-1 inclines in the same direction, so that the contact surface of the grinding blade 13 with materials and grinding media can be increased during grinding.

Three separating discs 14 are axially arranged on the rotor sleeve 5 at intervals, the separating discs 14 are positioned between the grinding blades 13, two separating discs 14 are arranged in the fine grinding cavity 10 and are respectively positioned at two sides of the fine grinding cavity 10, and one separating disc 14 is arranged in the fine grinding cavity 11 and is positioned at one side of the fine grinding cavity 11 close to the fine grinding cavity 10. The peripheral edge of the separating disc 14 is provided with through holes 14-1 which are uniformly distributed in the circumferential direction, the through holes 14-1 can be used as a channel for conveying materials, and the shearing effect of the grinding medium on the materials can be increased during conveying, so that the grinding effect on the materials is further improved.

A partition plate 15 is arranged between the fine grinding cavity 11 and the inner side face of the discharge pipe 7, four filter screens 16 are arranged on the partition plate 15, the four filter screens 16 are fixed on the partition plate 15 in a square distribution mode, meshes of two filter screens 16 in one diagonal direction are transversely formed, meshes of two filter screens 16 in the other diagonal direction are vertically formed, and materials which are finely ground in the fine grinding cavity 11 enter the discharge pipe 7 through the filter screens 16.

And in order to improve the dispersibility of the ground materials during discharging, a stirring rod 17 is arranged on the front end face of the main shaft 4 near the filter screen 16, and the stirring rod 17 is fixedly connected with the main shaft 4 in the radial direction.

The upper end face of the discharge pipe 7 is provided with a drying filter 18 for absorbing water vapor existing in the grinding cavity; a dust cap 19 is fixed to the front end face of the tapping pipe 7, and the filter screen 16 can be easily replaced when the dust cap 19 is removed.

During grinding operation, materials and grinding media are added into the pre-grinding cavity 9 from the feeding pipe 6, the main shaft 4 drives the stirring blade 12 to rotate, so that the materials are dispersed and sheared and ground by the grinding media, meanwhile, the pre-ground materials and the grinding media are conveyed to the fine grinding cavity 10 under the pushing of the stirring blade 12, and in the process, as gaps exist among the fan-shaped blocks 12-1 of the stirring blade 12, a mixture of the materials and the grinding media rotating at high speed can be more contacted with the fan-shaped blocks 12-1 when passing through the gaps, so that the grinding fineness is improved; the mixture of the materials and the grinding media continuously generates relative high-speed motion under the driving of the grinding blades 13 in the fine grinding cavity 10, the materials are further finely ground and conveyed to the fine grinding cavity 11, the through holes 14-1 in the separating disc 14 can increase the shearing action of the grinding media on the materials while conveying the materials, so that the grinding action on the materials is further improved, the materials with thinned fineness are further finely ground in the fine grinding cavity 11 through the grinding media to obtain the fineness meeting the requirements, and finally the materials enter the discharge pipe 7 after being filtered by the filter screen 16 to be discharged.

The grinding cavity of the sand mill is divided into a pre-grinding cavity 9, a fine grinding cavity 10 and a fine grinding cavity 11, the mixture of materials and grinding media is driven to move at a relatively high speed by the stirring blades 12 and the grinding blades 13, so that the grinding treatment of the materials is realized.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a dry-type sand mill, has the interior barrel that constitutes the grinding chamber, traverses interior barrel center and is provided with the main shaft, and interior barrel rear end periphery wall is connected with the inlet pipe, and discharging pipe, characterized by are installed to the terminal surface before the interior barrel: the grinding chamber including grind the chamber in advance, finely grind the chamber and correct grinding chamber, install on the main shaft of grind the intracavity in advance and encircle main shaft circumference interval formula distribution and form axial helical structure and to the stirring vane of finely grinding the chamber pay-off, install on the main shaft of finely grinding the chamber and correct grinding intracavity and set up in pairs along main shaft axial interval and to the grinding vane of discharging tube direction pay-off, it is perpendicular to every to set up and adjacent two pairs of grinding vane space between for main shaft axis symmetry to grinding vane, install the filter screen between finish grinding chamber and the discharging tube.

2. The dry sand mill as set forth in claim 1, characterized in that: the main shaft is provided with a rotor sleeve, and the stirring blade and the grinding blade penetrate through the rotor sleeve to be fixedly connected with the main shaft.

3. The dry sand mill as set forth in claim 2, characterized in that: the stirring blade comprises a sector block and a connecting block which are of an integral structure, and the connecting block radially penetrates through the rotor sleeve to be fixedly connected with the main shaft, so that the sector block is obliquely arranged on the periphery of the rotor sleeve.

4. The dry sand mill as set forth in claim 2, characterized in that: the grinding blade comprises a rectangular block and a fixed block which are integrated, and the fixed block radially penetrates through the rotor sleeve to be fixedly connected with the periphery of the main shaft, so that the rectangular block is arranged on the rotor sleeve in a skewed feeding direction.

5. The dry sand mill as set forth in claim 4, characterized in that: the upper end face of the rectangular block is provided with a chamfer face which inclines from the center of the rectangular block to one side edge of the rectangular block.

6. The dry sand mill as set forth in claim 1, characterized in that: the rotor sleeve is provided with separating discs at axial intervals, the separating discs are positioned between the grinding blades, and through holes are formed in the peripheral edge of each separating disc and are uniformly distributed in the circumferential direction.

7. The dry sand mill as set forth in claim 1, characterized in that: the front end face of the main shaft close to the filter screen is provided with a stirring rod, and the stirring rod is fixedly connected with the main shaft in the radial direction.

8. The dry sand mill as set forth in claim 1, characterized in that: the discharging pipe up end install drier-filter, the terminal surface is fixed with simultaneously and conveniently changes the dustproof apron of filter screen before the discharging pipe.

9. The dry sand mill as set forth in claim 1, characterized in that: the bearing base is installed to interior barrel rear end, installs the bearing that supports the main shaft on the bearing base, interior barrel is fixed between bearing base and discharging pipe, is located interior barrel periphery and installs outer barrel, outer barrel both ends are fixed with bearing base, discharging pipe respectively, the inlet pipe pass outer barrel and link firmly with interior barrel.