Accurate grinding equipment for boron carbide powder particles

Abstract

The invention relates to the technical field of boron carbide accurate grinding, in particular to boron carbide powder particle accurate grinding equipment which comprises a grinding part used for grinding slurry through a grinding medium arranged in the grinding part and a discharging part arranged on the grinding part and used for pumping out the ground slurry. Wherein the design of the discharging part is as follows: the discharging part can scrape and clean the grinding part when the ground slurry is pumped out; the discharging device has the beneficial effects that in the discharging process, the negative pressure mechanism is started, negative pressure is generated in the material suction pipe, and therefore slurry in the barrel is pumped out, and discharging is achieved. And after the slurry is completely discharged, the driving assembly II drives the rotating head to rotate, so that the material suction pipe rotates along the axis of the barrel, and the inner wall of the barrel is scraped and cleaned by utilizing the material suction pipe.

Description

Technical Field

[0001] The invention relates to the technical field of boron carbide fine grinding, and in particular to boron carbide powder particle fine grinding equipment. Background Art

[0002] Boron carbide (B 4 C) is a ceramic material with extremely high hardness, wear resistance and chemical stability, which is widely used in abrasives, cutting tools, bulletproof materials and nuclear industry. In order to meet the needs of different applications, boron carbide powder particles usually need to be finely ground to achieve the required particle size and surface properties. In the fine grinding process of boron carbide powder particles, wet ball mill is a commonly used equipment, which realizes efficient grinding of materials through the combined action of grinding media (such as steel balls, ceramic balls, etc.) and liquid media (such as water or organic solvents).

[0003] However, the existing wet ball mill has some significant problems in practical application, especially in the discharge process. Since the boron carbide slurry has a certain viscosity, the slurry is easy to adhere to the inside of the ball mill, especially the inner wall of the cylinder and the surface of the liner, resulting in difficulty in discharging. This problem is particularly prominent in the following aspects:

[0004] Slurry adhesion problem:

[0005] Boron carbide slurry forms a high viscosity mixture during the grinding process and easily adheres to the internal surface of the ball mill.

[0006] The adhered slurry not only affects the discharge efficiency, but also may cause material waste and difficulty in equipment cleaning.

[0007] Influence of liner structure:

[0008] In order to improve the grinding effect, a liner is usually installed inside the wet ball mill. The design of the liner (such as wave shape, stepped shape, etc.) can enhance the movement effect of the grinding media and improve the grinding efficiency.

[0009] However, the wavy surface of the liner increases the area and probability of slurry adhesion, especially in the depressions of the wavy surface, where slurry is more likely to accumulate, further exacerbating the difficulty of discharge and cleaning.

[0010] Difficult to clean and maintain:

[0011] The slurry adhering to the surface of the liner is difficult to be completely discharged by conventional discharge methods, and often requires manual cleaning after shutdown.

[0012] Long-term accumulated slurry may also harden and form lumps that are difficult to remove, further affecting equipment performance.

[0013] In summary, although the existing wet ball mill can achieve high grinding efficiency in the fine grinding process of boron carbide powder particles, it has significant defects in discharge and cleaning, especially the wavy design of the liner aggravates the slurry adhesion problem. Therefore, an improved boron carbide powder particle fine grinding equipment is urgently needed, which can effectively solve the problem of slurry adhesion and inconvenience in cleaning while ensuring the grinding effect. Summary of the invention

[0014] In order to solve the above problems, the embodiments of the present invention provide a boron carbide powder particle fine grinding device, which achieves the purpose of solving the problems raised in the background technology.

[0015] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical solutions: including:

[0016] The grinding part grinds the slurry by means of the grinding media provided inside, and

[0017] A discharge part, arranged on the grinding part, for extracting the slurry after grinding;

[0018] The discharge part is designed so that it can scrape and clean the grinding part when extracting the ground slurry.

[0019] The grinding part comprises a cylinder, and the discharge part comprises a suction pipe rotatably arranged along the axis of the cylinder, and the suction pipe is attached to the inner wall of the cylinder.

[0020] The discharge part also includes:

[0021] There are two rotating heads, which are rotatably connected to the two ends of the cylinder.

[0022] A connecting pipe is fixedly connected to the inside of the rotating head, one end of which is slidably connected to the suction pipe, and the other end of which is rotatably connected to the pipeline, and

[0023] The driving component 2 is used to drive the rotating head to rotate, so as to drive the suction pipe to rotate along the axis of the cylinder.

[0024] The suction pipe is provided with an elliptical or triangular suction hole.

[0025] A rubber scraper is fixedly connected to one side of the suction pipe close to the grinding part.

[0026] A lining plate is arranged inside the cylinder.

[0027] A pressure supply assembly is arranged between the connecting pipe and the suction pipe, and the pressure supply assembly is used to push the suction pipe to always fit on the lining plate.

[0028] The pressure supply assembly comprises:

[0029] Airway 1 is set inside the suction pipe.

[0030] Airway 2 is arranged inside the connecting pipe and communicates with airway 1.

[0031] The air bag is arranged at the connection of the connecting pipe and the suction pipe and is used to connect the air passage 1 and the air passage 2. After the air bag is inflated, it can push the suction pipe to move inside the connecting pipe.

[0032] A partition is arranged inside the suction pipe, and the interior of the suction pipe is divided into an airway 1 and a passage through the partition; a pressure relief valve is arranged on the airway 1.

[0033] The beneficial effects of the embodiments of the present invention are:

[0034] During the discharge process, the negative pressure mechanism is activated to generate negative pressure inside the suction pipe, thereby extracting the slurry in the cylinder to achieve discharge. When the slurry is completely discharged, the second drive component drives the rotating head to rotate, thereby causing the suction pipe to rotate along the axis of the cylinder, and the suction pipe is used to scrape and clean the inner wall of the cylinder;

[0035] The ventilation pipe is arranged on the connecting pipe and is connected to the air channel two. The air channel two is located inside the connecting pipe and is connected to the external air pump through the ventilation pipe. After the air pump is started, the air bag is inflated and expanded, so that the suction pipe is pressed tightly against the inner wall of the cylinder. Since a lining plate with a wavy surface is installed in the cylinder, the suction pipe is always in contact with the lining plate after the air bag is inflated, so that the lining plate can be scraped and cleaned. When the lining plate and the suction pipe move relative to each other, the raised part of the lining plate will squeeze the suction pipe and then squeeze the air bag. At this time, the pressurized gas in the air channel one is discharged into the channel through the pressure relief valve. Through this design, the suction pipe can always be in contact with the lining plate and move with the change of its surface shape, ensuring the effective scraping and cleaning of the lining plate;

[0036] When the suction tube rotates, since the suction tube fits against the inner wall of the lining, the raised part of the lining will squeeze the suction tube and then squeeze the airbag. At this time, the pressurized gas in the airway is discharged into the channel through the pressure relief valve. Since the interior of the channel is filled with liquid medium, the pressurized gas can increase the pressure inside the channel after connecting to the channel, thereby increasing the impact force of the liquid medium. Since the surface of the lining is wavy, the lining can periodically squeeze the suction tube, that is, the impact force of the liquid medium increases periodically, thereby increasing the spray coverage of the liquid medium and improving the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the present invention;

[0038] Figure 2 is a cross-sectional schematic diagram of the present invention from a first viewing angle;

[0039] Figure 3 for Figure 2A schematic diagram of the structure enlargement at the center A;

[0040] Figure 4 is a cross-sectional schematic diagram of the present invention from a second viewing angle;

[0041] Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A;

[0042] Figure 6 It is a cross-sectional schematic diagram of the suction pipe of the present invention.

[0043] In the figure: 1. Grinding part; 2. Discharging part; 3. Pressure supply component;

[0044] 11. Base frame; 12. Cylinder; 13. Gear ring 1; 14. Gear 1; 15. Motor 1; 16. Lining plate;

[0045] 21. Suction pipe; 22. Rotating head; 23. Connecting pipe; 24. Pipe; 25. Driving component 2; 26. Suction hole; 27. Rubber scraper; 28. Channel;

[0046] 31. Airway 1; 32. Airway 2; 33. Airbag; 34. Pressure relief valve;

[0047] 251. Gear ring 2; 252. Motor 2; 253. Gear 2. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0049] Figure 1 The embodiment of the boron carbide powder particle fine grinding device proposed by the present invention is shown, comprising a grinding part 1 and a discharge part 2, wherein the grinding part 1 comprises:

[0050] The base frame 11 serves as a supporting frame of the equipment and carries the main components;

[0051] The cylinder 12 is horizontally mounted on the top of the base frame 11 and is rotatable; a feeding port (not shown) is provided on the side of the cylinder 12 for injecting the pre-mixed slurry (composed of material and liquid medium) into the cylinder;

[0052] A driving assembly 1, mounted on the base frame 11, for driving the cylinder 12 to rotate;

[0053] The slurry enters the cylinder 12 through the feeding port, and the cylinder 12 rotates under the drive of the driving component 1, and the grinding medium inside grinds the slurry, thereby achieving fine grinding of the material.

[0054] according to Figure 1 As shown, the driving component 1 includes:

[0055] A gear ring 13 is fixed to the outside of the cylinder 12 and rotates synchronously with the cylinder 12;

[0056] Gear 14, meshing with gear ring 13, for transmitting power;

[0057] Motor 15 provides power and drives gear 14 to rotate after starting;

[0058] After the motor 15 is started, it drives the gear 14 to rotate, and the gear 14 meshes with the gear ring 13 to drive the gear ring 13 to rotate, and the gear ring 13 drives the cylinder 12 to rotate, so that the grinding medium inside the cylinder body grinds the slurry.

[0059] Figure 1-2 The embodiment of the discharge part 2 is shown, and the discharge part 2 includes: a suction pipe 21, a rotating head 22, a connecting pipe 23, a pipeline 24 and a second driving component 25; the suction pipe 21 is rotatably arranged along the axis of the cylinder 12 and fits inside the cylinder 12, the two rotating heads 22 are rotatably connected and sealed at both ends of the cylinder 12, the connecting pipe 23 is fixedly connected inside the rotating head 22, one end of the connecting pipe 23 is slidably connected to the suction pipe 21, and the other end is rotatably connected to the pipeline 24; the second driving component 25 can drive the rotating head 22 to rotate; the suction pipe 21 is externally connected to a negative pressure mechanism;

[0060] During the discharge process, the negative pressure mechanism is activated to generate negative pressure inside the suction pipe 21, thereby extracting the slurry in the cylinder 12 to achieve discharge. When the slurry is completely discharged, the drive assembly 25 drives the rotating head 22 to rotate, thereby rotating the suction pipe 21 along the axis of the cylinder 12, and using the suction pipe 21 to scrape and clean the inner wall of the cylinder 12.

[0061] In order to enhance the scraping effect of the suction pipe 21, a rubber scraper 27 is installed on the suction pipe 21. In addition, since the grinding medium is usually spherical and small in size, in order to prevent the grinding medium from clogging the suction hole 26 of the suction pipe 21 when the slurry is discharged, the suction hole 26 is designed to be elliptical or triangular.

[0062] The driving assembly 25 includes a gear ring 251 fixedly connected to the rotating head 22, a motor 252 arranged on the base frame 11, and a gear 253 fixed on the output shaft of the motor 252. After the motor 252 is started, it drives the gear 253 to rotate, thereby driving the gear ring 251 to rotate, and can synchronously drive the rotating head 22 to rotate.

[0063] Figure 3-6The embodiment of the pressure supply assembly 3 is shown, and the pressure supply assembly 3 includes: an air channel 1 31, an air channel 2 32, an air bag 33 and a pressure relief valve 34; a partition is provided inside the suction pipe 21 to separate the suction pipe 21 into two parts: the air channel 1 31 and the channel 28;

[0064] A pressure relief valve 34 is installed on the airway 1 31. When the pressure relief valve 34 releases gas, the gas will enter the channel 28. The suction hole 26 is connected to the channel 28. When the negative pressure mechanism is activated, negative pressure is generated in the channel 28, and the slurry is sucked into the channel 28 through the suction hole 26. Then the slurry enters the pipeline 24 through the connecting pipe 23 and is discharged;

[0065] The vent pipe is arranged on the connecting pipe 23 and communicates with the second airway 32. The second airway 32 is located inside the connecting pipe 23 and is connected to the external air pump through the vent pipe. After the air pump is started, the airbag 33 is inflated and expanded, so that the suction pipe 21 is pressed tightly against the inner wall of the cylinder 12. Since the cylinder 12 is equipped with a wavy lining plate 16, the airbag 33 is inflated so that the suction pipe 21 is always in contact with the lining plate 16, so that the lining plate 16 can be scraped and cleaned. When the lining plate 16 and the suction pipe 21 move relative to each other, the raised part of the lining plate 16 will squeeze the suction pipe 21, and then squeeze the airbag 33. At this time, the pressure gas in the airway 1 31 is discharged into the channel 28 through the pressure relief valve 34.

[0066] With this design, the suction pipe 21 can always fit the lining plate 16 and move along with the change of its surface shape, thereby ensuring the effective scraping and cleaning of the lining plate 16 .

[0067] When discharging, the negative pressure mechanism is activated, so that the inside of the channel 28 becomes negative pressure. When the suction hole 26 is blocked, the gas discharged by the pressure relief valve 34 can be used to compensate the pressure inside the channel 28 to avoid damage to the negative pressure mechanism.

[0068] When the grinding operation is performed, the driving component 25 drives the rotating head 22 to rotate, so that the suction pipe 21 moves to the top of the cylinder 12, thereby preventing the suction pipe 21 from affecting the normal movement of the grinding medium during the grinding operation; after the suction pipe 21 moves to the top of the cylinder 12, the inflation pump stops running. At this time, the suction pipe 21 squeezes the airbag 33 under the action of gravity, so that the airbag 33 is compressed. At this time, there is a certain distance between the suction pipe 21 and the lining plate 16, which can prevent the suction pipe 21 from hindering the rotation of the cylinder 12.

[0069] There are two connecting pipes 23, both of which are connected to the suction pipe 21, and both of which are connected to the pipeline 24, one of which is externally connected to the negative pressure mechanism, and the other is externally connected to the delivery pump; and the pipelines 24 are both provided with solenoid valves;

[0070] When discharging, the solenoid valve on the pipe 24 connected to the negative pressure mechanism is opened, and the other solenoid valve is closed. After the negative pressure mechanism is started, negative pressure is generated inside the suction pipe 21, and the material can be sucked into the suction pipe 21 to achieve discharging;

[0071] After the discharge is completed, since the slurry has a certain viscosity, a lot of slurry adheres to the grinding medium and the suction pipe 21. At this time, a liquid medium can be injected into the cylinder 12 to dilute the slurry. At the same time, the grinding medium, the suction pipe 21 and the inner wall of the liner 16 are washed by the liquid medium to clean the slurry. If the viscosity of the slurry is too high to be extracted, the slurry can be diluted by injecting a liquid medium into the cylinder 12.

[0072] Specifically, after the discharge is completed, the suction pipe 21 rotates to the top of the cylinder 12, at which time the solenoid valve on the pipe 24 connected to the delivery pump is opened, and the other solenoid valve is closed. After the delivery pump is started, the liquid medium is passed into the interior of the suction pipe 21, so that the liquid medium is sprayed out through the suction hole 26, and the suction hole 26, the grinding medium, the suction pipe 21 and the inner wall of the liner 16 are washed by the liquid medium;

[0073] In order to improve the flushing effect, during flushing, the driving component 25 can be used to drive the suction pipe 21 to rotate inside the cylinder 12, so that the liquid medium is sprayed more evenly;

[0074] There are two groups of suction holes 26, which are symmetrically arranged, and one group of suction holes 26 is arranged close to both sides of the rubber scraper 27; when the liquid medium is sprayed out from the suction holes 26, the liquid medium sprayed out of one group of suction holes 26 is sprayed on the grinding medium to wash the grinding medium, and the liquid medium sprayed out of the other group of suction holes 26 is sprayed on the inner wall of the liner 16 to wash the inner wall of the liner 16;

[0075] During flushing, the pressure supply assembly 3 can be started so that the suction pipe 21 fits against the inner wall of the liner 16. When a group of suction holes 26 sprays liquid medium, the liquid medium impacts the inner wall of the liner 16. Since the distance between the suction pipe 21 and the liner 16 is small, the liquid medium can rebound onto the suction pipe 21, thereby flushing the suction pipe 21.

[0076] When the suction tube 21 rotates, since the suction tube 21 is attached to the inner wall of the lining plate 16, the raised part of the lining plate 16 will squeeze the suction tube 21, and then squeeze the air bag 33. At this time, the pressurized gas in the airway 31 is discharged into the channel 28 through the pressure relief valve 34. Since the interior of the channel 28 is filled with liquid medium, the pressurized gas can increase the pressure inside the channel 28 after connecting to the channel 28, thereby increasing the impact force of the liquid medium. Since the surface of the lining plate 16 is wavy, the lining plate 16 can periodically squeeze the suction tube 21, that is, the impact force of the liquid medium is periodically increased, thereby increasing the spray coverage of the liquid medium and improving the flushing effect.

[0077] It should be noted that in the description of the present invention, the terms "center, up, down, left, right, vertical, horizontal, inside, outside" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second, third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0078] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0080] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. Boron carbide powder particle fine grinding equipment, characterized in that: include: The grinding part (1) grinds the slurry by means of grinding media disposed inside, and A discharge part (2) is arranged on the grinding part (1) and is used to extract the slurry after grinding; The discharge portion (2) is designed to scrape and clean the grinding portion (1) when the ground slurry is extracted.

2. The boron carbide powder particle fine grinding equipment according to claim 1, characterized in that: The grinding part (1) comprises a cylinder (12); The discharge portion (2) comprises a suction pipe (21), which is rotatably arranged along the axis of the cylinder (12) and is attached to the inner wall of the cylinder (12).

3. The boron carbide powder particle fine grinding equipment according to claim 2, characterized in that: The discharge part (2) further comprises: There are two rotating heads (22), which are rotatably connected to the two ends of the cylinder (12). A connecting pipe (23) is fixedly connected to the inside of the rotating head (22), one end of which is slidably connected to the suction pipe (21) and the other end of which is rotatably connected to the pipeline (24), and The second driving assembly (25) is used to drive the rotating head (22) to rotate, so as to drive the suction pipe (21) to rotate along the axis of the cylinder (12).

4. The boron carbide powder particle fine grinding equipment according to any one of claims 2-3, characterized in that: The suction pipe (21) is provided with an elliptical or triangular suction hole (26).

5. The boron carbide powder particle fine grinding equipment according to any one of claims 2-3, characterized in that: A rubber scraper (27) is fixedly connected to one side of the suction pipe (21) close to the grinding part (1).

6. The boron carbide powder particle fine grinding equipment according to claim 3, characterized in that: A lining plate (16) is arranged inside the cylinder (12).

7. The boron carbide powder particle fine grinding equipment according to claim 6, characterized in that: A pressure supply assembly (3) is provided between the connecting pipe (23) and the suction pipe (21), and the pressure supply assembly (3) is used to push the suction pipe (21) to always fit on the lining plate (16).

8. The boron carbide powder particle fine grinding equipment according to claim 7, characterized in that: The pressure supply component (3) comprises: The air channel 1 (31) is arranged inside the suction pipe (21). The second airway (32) is arranged inside the connecting pipe (23) and communicates with the first airway (31). The air bag (33) is arranged at the connection between the connecting pipe (23) and the suction pipe (21) and is used to connect the air passage 1 (31) and the air passage 2 (32). After the air bag (33) is inflated, it can push the suction pipe (21) to move inside the connecting pipe (23).

9. The boron carbide powder particle fine grinding equipment according to claim 8, characterized in that: A partition is provided inside the suction pipe (21), and the interior of the suction pipe (21) is divided into an airway 1 (31) and a channel (28) by the partition; a pressure relief valve (34) is provided on the airway 1 (31).

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