Double-roller crushing equipment for abrasive machining

Abstract

A double-roller crushing device for abrasive machining comprises rotating rollers which are arranged in pairs and driven by a power device to rotate and work, the two rotating rollers are arranged side by side, polycrystalline diamond layers are arranged on the peripheral faces of the rotating rollers, the double-roller crushing device further comprises a shell, and the rotating rollers are arranged in the shell. A material receiving groove is formed in the position, corresponding to an area formed by projections of the outer side faces and the end faces of the two rotating rollers, of the inner bottom of the shell, and abrasion-resistant ceramic protective layers are arranged on the material receiving groove and the inner wall of the shell. According to the rotating roller, the polycrystalline diamond material is selected as the working surface layer of the rotating roller, the hardness of the rotating roller is equal to that of diamond, the rotating roller is formed by sintering diamond micro-powder and a binder at high temperature and high pressure, the size can be several centimeters and is larger than that of a diamond crystal, and the rotating roller has cuttable and weldable workability; the wear resistance and durability of the equipment can be ensured, and batch production can be carried out; and the feeding device arranged at the upper part of the shell adopts a flat opening design, so that uniform blanking is facilitated, local abrasion of a roller surface is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of double-roll crushing equipment for material crushing and processing, and specifically relates to a double-roll crushing equipment for abrasive processing with a working layer made of polycrystalline diamond material. Background Art

[0002] At present, when crushing hard materials such as corundum, quartz, feldspar and other substances, double-roll crushing equipment is a relatively common choice. However, due to the high hardness of hard materials, when the double-roll crushing equipment makes hard contact with hard materials during use, it may cause damage to the roll surface of the double-roll crushing equipment, and the equipment is easily damaged, resulting in increased production costs and reduced labor efficiency for maintenance. And the common double-roll crushing equipment has a general metal structure without protection for the material collection part, which is easy to form abrasive wear and introduce impurities into the processed materials. Through design improvement, the utility model uses polycrystalline diamond material for protection on the roll working surface, and uses wear-resistant ceramic material for protection on the material collection part, which can effectively extend the service life of the equipment and keep the materials clean. It is well-known that polycrystalline diamond has the same hardness as diamond, overcomes the brittleness defect of diamond, can synthesize large-size polycrystalline composite sheets, and has processability such as easy cutting and welding. Using it as the working layer of the double-roll crushing equipment can not only increase the wear resistance of the roll surface and extend the working life, but also reduce the introduction of impurities, with good comprehensive social benefits. Content of the Utility Model

[0003] The utility model provides a double-roll crushing equipment for abrasive processing, specifically a double-roll crushing equipment with a working layer made of polycrystalline diamond material, so as to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] It includes rotating rollers. The rotating rollers are arranged in pairs with equal size specifications and are driven to rotate by a power device. The two rotating rollers are arranged side by side, and a polycrystalline diamond layer is provided on the outer peripheral surface. It also includes a housing. The rotating rollers are arranged inside the housing. A material collecting groove is opened at the corresponding position of the inner bottom of the housing in the area formed by the outer sides and end projections of the two rotating rollers. A wear-resistant ceramic protective layer is provided on the inner wall of the material collecting groove and the housing. A feeding device is provided at the central position of the top of the housing. The feeding device is in the shape of a frustum with a large upper opening and a small lower opening, and the lower part of the feeding device is a guide pipe with a flat opening at the lower end. A stop valve is provided on the guide pipe to control the feeding speed and flow rate. The flat lip of the guide pipe is centered above the tangent plane of the top sides of the two rotating rollers, and its major axis direction is parallel to the roller axis direction. The length of the flat opening is about 80% of the axis length of the rotating roller, and the width of the flat opening is 3 - 10 times the particle size of the coarse particles of the material to be processed. A wear-resistant ceramic protective layer can also be provided on the inner wall of the feeding device. The bottom opening of the material collecting groove is at an appropriate height above the front end of the conveyor belt. The end of the conveyor belt is connected to a coarse screening device. The over-coarse materials after screening are collected and sent back to the feeding device for re-crushing. The undersize materials are further sieved to obtain finished abrasive; An air compressor for cleaning the roller surface and the inner cavity can also be connected to the top of the housing, which can clean the inside of the equipment and prevent the discharge pipe from being blocked to a certain extent, facilitating the processing of different materials and reducing cross-contamination.

[0006] For the pair-roller crushing equipment for abrasive processing as described above, the power device includes a motor. The motor is arranged outside the housing. The output shaft of the motor passes through the housing and is fixedly connected to the central position of one end of the pair-roller crushing. A first bearing is provided between the output shaft of the motor and the housing. The central position of the other end of the pair-roller crushing is fixedly connected to one end of a rotating rod. The other end of the rotating rod is rotatably connected to the inside of the housing through a second bearing.

[0007] The advantages of the present utility model are: The present utility model selects polycrystalline diamond material as the working surface layer of the rotating roller. Its hardness is equivalent to that of diamond, which is sintered from diamond micropowder and binder under high temperature and high pressure. The size can reach several centimeters, which is larger than the diamond crystal size and has easy processability of cutting and welding. It can ensure the wear resistance and durability of the equipment while enabling batch production. The equipment has high cost performance, high labor efficiency, and good comprehensive social benefits; The feeding device provided at the upper part of the housing adopts a flat opening design, which is beneficial to uniform feeding to reduce the local wear phenomenon of the roller surface and extend the working life of the equipment. Description of the Drawings

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 is a schematic structural diagram of the present invention;

[0010] Figure 2 is Figure 1 an enlarged view of the A-A cross-sectional view of

[0011] Reference numerals: 1, housing; 2, rotating roller; 3, polycrystalline diamond layer; 4, material receiving groove; 5, wear-resistant ceramic material protective layer; 6, feeding device; 7, air compressor; 8, conveyor belt; 9, motor; 10, first bearing; 11, rotating rod; 12, second bearing. Specific embodiments

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0013] A pair-roll crushing device for abrasive processing includes a rotating roller 2. The rotating rollers are arranged in pairs with equal size specifications and are located inside the housing 1, and are driven to rotate by a power device. The two rotating rollers are arranged side by side, and a polycrystalline diamond layer 3 is provided on the outer peripheral surface. The inner side spacing of the two rotating rollers 2 can be adjusted, and the minimum spacing can be set to 0.1 - 3 mm. A material receiving groove 4 is opened at the corresponding position of the inner bottom of the housing 1 and the area projected by the outer side and end face of the rotating roller 2. A wear-resistant ceramic material protective layer 5 is provided on the inner wall of the housing 1 and the material receiving groove 4. An inlet device 6 is provided at the central position of the top of the housing 1. The upper part of the inlet device 6 is in the shape of a flared mouth, larger at the top and smaller at the bottom, or in the shape of a truncated cone, and the lower part is a guide pipe with a flat opening at the lower end. The flat lip of the guide pipe is centered above the tangent plane of the top sides of the two rotating rollers. The length of the flat opening is about 80% of the axis length of the rotating roller, and the width of the flat opening is 3 - 10 times the coarsest particle size of the material to be processed. The bottom opening of the material receiving groove 4 is located above the front end of the conveyor belt 8. The end of the conveyor belt 8 is connected to a coarse screening device. The corresponding screened coarse materials are collected and re-crushed, and the undersize is further screened to obtain the finished abrasive.

[0014] When the utility model is in use, first start the device to enter the working state of the active roller rotating, and then send the hard materials into the middle position inside the top of the two working rollers in the housing 1 through the feeding device 6. The power device drives the two working rollers 2 to rotate to extrude the materials, thus completing the crushing operation. And the designed particle size and corresponding particle shape of the processed materials can be obtained by adjusting the roller spacing and recycling the coarse materials after crushing and screening for re-crushing.

[0015] Specifically, the power device described in this embodiment includes a motor 9. The motor 9 is arranged outside the housing 1. The output shaft of the motor 9 passes through the housing 1 and is fixedly connected to the central position on one side of the rotating roller 2. A first bearing 10 is arranged between the output shaft of the motor 9 and the housing 1. The central position on the other side of the rotating roller 2 is fixedly connected to one end of a rotating rod 11. The other end of the rotating rod 11 is rotatably connected to the inside of the housing 1 through a second bearing 12. By controlling the continuous rotation of the rotating roller 2 through the motor 9, the crushing operation can be conveniently completed, with a simple structure and easy to use.

[0016] Specifically, the upper part of the feeding device in this embodiment is in the shape of a flared mouth, larger at the top and smaller at the bottom, that is, in the shape of a truncated cone. The lower part is a guide pipe with a flat opening at the lower end. The bottom end of the flat opening of the guide pipe is centered above the plane tangent to the tops of the two rotating rollers. The length of the flat opening is about 80% of the axis length of the rotating roller, and the width of the flat opening is 3 - 10 times the coarsest particle diameter of the processed materials. In this way, the feeding device is convenient for feeding materials, preventing material spillage and reducing dust. The long and flat opening at the lower end of the guide pipe facilitates evenly sending the materials to the working roller surface of the pair of rollers, preventing local concentration of materials on the roller surface during operation, which may cause local wear due to high-frequency use of the local roller surface, is beneficial to improving the processing efficiency, reducing the introduction of impurities, ensuring the processing quality, and extending the service life of the equipment.

[0017] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pair-roller crushing device for abrasive processing, characterized in that: It includes a rotating roller (2) with a polycrystalline diamond layer (3) provided on the outer peripheral surface thereof. The rotating roller (2) is located inside the housing (1), and is arranged in pairs with equal size specifications. The rotating roller (2) is driven to rotate by a power device. The two rotating rollers (2) are arranged side by side. A material collecting groove (4) is opened at a corresponding position in the area formed by the projection of the axis and end face of the two rotating rollers (2) at the bottom inside the housing (1). A wear-resistant ceramic material protective layer (5) is provided on the inner wall of the housing (1) and the material collecting groove (4).

2. The roller crushing equipment for abrasive processing according to claim 1, characterized in that A feeding device (6) is provided at the central position of the top of the housing (1). The upper part of the feeding device (6) is in the shape of a truncated cone with a large upper part and a small lower part, and the lower part is a guide pipe with a flat opening at the lower end. A stop valve is provided on the guide pipe to control the feeding speed and flow rate. The flat lip of the guide pipe is centered above the plane tangent to the top sides of the two rotating rollers. The major axis length of the flat opening is about 80% of the axis length of the rotating roller, and the width of the flat opening is 3 - 10 times the major axis length of the material to be processed.

3. The roller crushing device for abrasive processing according to claim 1, characterized in that The bottom opening of the material collecting groove (4) is located above the front end of the conveyor belt (8), and the conveyor belt (8) is connected to a screening device.

4. The roller crushing equipment for abrasive processing according to claim 1, characterized in that An air compressor (7) for cleaning can also be provided at the top of the housing.

5. The roller crushing equipment for abrasive processing according to claim 1, characterized in that: The power device includes a motor (9). The motor (9) is arranged outside the housing (1). The output shaft of the motor (9) passes through the housing (1) and is fixedly connected to the central position of one end of the rotating roller (2). A first bearing (10) is provided between the output shaft of the motor (9) and the housing (1). The central position of the other end of the rotating roller (2) is fixedly connected to one end of a rotating rod (11). The other end of the rotating rod (11) is rotatably connected to the inside of the housing (1) through a second bearing (12).

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