Boron carbide powder preparation machine

Abstract

The invention relates to the technical field of boron carbide preparation, in particular to a boron carbide powder preparation machine which comprises pulping equipment used for preparing boron carbide slurry for wet grinding and accurate grinding equipment used for conducting accurate grinding on the boron carbide slurry for wet grinding. The pulping equipment comprises a stirring barrel, a pasty slurry part which is arranged in the stirring barrel and is used for preparing pasty boron carbide slurry, and a stirring and mixing part which is arranged in the stirring barrel and is used for stirring and mixing the pasty boron carbide slurry into the boron carbide slurry for wet grinding, according to the design of the pulping equipment, the mixing and stirring part synchronously stirs and mixes the interior of the pasty pulp part during operation; the preparation method has the beneficial effects that synchronous preparation of the pasty boron carbide slurry and the boron carbide slurry for wet grinding is realized, and meanwhile, the aim of improving the mixing efficiency by adopting a pre-wetting method when the boron carbide slurry for wet grinding is prepared is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of boron carbide preparation, and specifically relates to a machine for preparing boron carbide powder. Background Art

[0002] Boron carbide (B4C) is a ceramic material with extremely high hardness, low density, excellent wear resistance and corrosion resistance, and is widely used in fields such as bulletproof armor, nuclear industry, abrasive materials and wear-resistant components. To meet the requirements of different applications, boron carbide powder particles usually need to be finely ground to achieve the required particle size and surface characteristics. Fine grinding can not only improve the fluidity, dispersibility and sintering performance of the powder, but also enhance the mechanical properties and surface quality of the final product.

[0003] In the fine grinding process of boron carbide powder particles, a wet ball mill is a commonly used device. The wet ball mill realizes the 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). Compared with dry grinding, wet grinding has the following advantages:

[0004] High grinding efficiency: The liquid medium can reduce the friction between powder particles, reduce the agglomeration phenomenon, and thus improve the grinding efficiency.

[0005] Uniform particle size distribution: Wet grinding can better control the particle size distribution of powder particles, avoiding the generation of over-sized or over-fine particles.

[0006] Reduce dust pollution: The liquid medium can effectively inhibit the generation of dust and improve the working environment.

[0007] However, in the preparation process of the slurry for wet grinding of boron carbide, if the boron carbide powder is directly added to the liquid medium, the boron carbide powder is likely to float on the surface of the liquid medium, resulting in difficult stirring and mixing. This phenomenon is mainly due to the hydrophobicity of the boron carbide powder and the surface tension of the liquid medium. The floating powder is not only difficult to fully contact with the liquid medium, but also easily forms agglomerates, affecting the subsequent grinding effect and the uniformity of the slurry.

[0008] To solve this problem, the pre-wetting method is usually adopted, that is, the boron carbide powder is first prepared into a paste. The paste has achieved the preliminary wetting and dispersion of the powder, reducing the possibility of powder floating and agglomeration, and thus being more easily and uniformly mixed with the liquid medium. Specifically, the pre-wetting method has the following advantages:

[0009] Improve wettability: By pre-mixing the boron carbide powder with a small amount of liquid medium, the wettability of the powder can be significantly improved, making it easier to disperse into the liquid medium.

[0010] Reduce floating phenomenon: The fluidity of the paste is between that of dry powder and thin slurry, which can effectively reduce the phenomenon of powder floating on the liquid surface.

[0011] Improve mixing efficiency: The powder in the paste has been preliminarily dispersed. After adding the liquid medium, uniform mixing can be achieved more quickly, shortening the preparation time.

[0012] Therefore, a mechanical device for preparing boron carbide powder is needed to realize the preparation of slurry for wet grinding of boron carbide by the pre-wetting method. Summary of the Invention

[0013] To solve the above problems, the embodiments of the present invention provide a mechanical device for preparing boron carbide powder, achieving the purpose of solving the problems proposed in the background technology.

[0014] The embodiments of the present invention specifically adopt the following technical solutions to achieve the above purpose: including: a pulping device for preparing boron carbide slurry for wet grinding, and a fine grinding device for finely grinding the boron carbide slurry for wet grinding;

[0015] The pulping device includes: a stirring cylinder, a paste slurry part arranged inside the stirring cylinder for preparing paste boron carbide slurry, and a stirring and mixing part arranged inside the stirring cylinder for stirring and mixing the paste boron carbide slurry into boron carbide slurry for wet grinding;

[0016] Among them, the pulping device is designed such that the mixing and stirring part simultaneously stirs and mixes the inside of the paste slurry part during operation.

[0017] The paste slurry part includes: a chamber one arranged inside the stirring cylinder, a stirring frame one rotatably arranged inside the chamber one, a liquid inlet pipe rotatably arranged on the top of the stirring frame one for introducing a liquid medium into the inside of the stirring frame one, a liquid outlet hole arranged on the side of the stirring frame one and communicated with the liquid inlet pipe, and a baffle rotatably arranged outside the stirring frame one and located inside the chamber one.

[0018] The stirring and mixing part includes: a chamber two arranged inside the stirring cylinder and communicated below the chamber one, and a stirring frame two rotatably arranged inside the chamber two and fixedly connected to the bottom of the stirring frame one.

[0019] The pulping device further includes: a discharging assembly arranged at the bottom of the stirring cylinder for feeding the boron carbide slurry for wet grinding into the fine grinding device, and a driving assembly three arranged on the stirring cylinder for driving the stirring frame one to rotate and move up and down.

[0020] The fine grinding device includes: a grinding part for grinding the slurry through the grinding medium arranged inside, and a discharging part arranged on the grinding part for pumping out the ground slurry;

[0021] Among them, the discharging part is designed to scrape and clean the grinding part when extracting the ground slurry.

[0022] The grinding part includes a cylinder body; the discharging part includes a suction pipe, which is rotatably arranged along the axis of the cylinder body and fits on the inner wall of the cylinder body.

[0023] The discharging part further includes: two rotating heads, which are respectively rotatably connected to both ends of the cylinder body.

[0024] A connecting pipe, fixedly connected inside the rotating head, with one end slidably connected to the suction pipe and the other end rotatably connected to a pipeline, and a driving assembly II for driving the rotating head to rotate so as to drive the suction pipe to rotate along the axis of the cylinder body.

[0025] A lining plate is arranged inside the cylinder body, and 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.

[0026] The pressure supply assembly includes:

[0027] An air duct I, arranged inside the suction pipe.

[0028] An air duct II, arranged inside the connecting pipe and communicating with the air duct I.

[0029] An airbag, arranged at the connection between the connecting pipe and the suction pipe, for communicating the air duct I and the air duct II. After the airbag is inflated, it can push the suction pipe to move inside the connecting pipe.

[0030] A partition plate is arranged inside the suction pipe, and the inner part of the suction pipe is divided into the air duct I and a channel by the partition plate; a pressure relief valve is arranged on the air duct I.

[0031] The beneficial effects of the embodiments of the present invention are as follows:

[0032] During actual use, boron carbide powder is added to the paste slurry part, a liquid medium is introduced into the paste slurry part, and paste boron carbide slurry is made by stirring; subsequently, the paste boron carbide slurry inside the paste slurry part enters the stirring and mixing part, a liquid medium is introduced into the stirring and mixing part, at the same time boron carbide powder is added to the paste slurry part, a liquid medium is introduced into the paste slurry part, and when stirring, the mixture of the paste boron carbide slurry and the liquid medium inside the stirring and mixing part can be stirred to make boron carbide slurry for wet grinding, and the mixture of boron carbide powder and the liquid medium inside the paste slurry part can be stirred to make paste boron carbide slurry; that is, the synchronous preparation of paste boron carbide slurry and boron carbide slurry for wet grinding is realized, and at the same time, the purpose of improving the mixing efficiency by using the pre-wetting method when preparing boron carbide slurry for wet grinding is achieved.

[0033] When stirring, since the baffle is located inside the mixing cylinder, the baffle will not rotate when the mixing frame rotates; when adding the paste boron carbide slurry inside chamber one into chamber two, the baffle moves upward, separating the baffle from the mixing cylinder. At this time, when the mixing frame rotates, affected by the frictional force between the mixing frame one and the baffle, the baffle rotates synchronously. After the baffle rotates, by the centrifugal force of the baffle, it is convenient to send the paste boron carbide slurry to the connection position between chamber one and chamber two, that is, it is convenient to send the paste boron carbide slurry into chamber two;

[0034] During the discharging process, the negative pressure mechanism is activated to generate negative pressure inside the suction pipe, thereby pumping out the slurry inside the cylinder to achieve discharging. When the slurry is completely discharged, the driving component two drives the rotating head to rotate, and then the suction pipe rotates along the axis of the cylinder to scrape and clean the inner wall of the cylinder by using the suction pipe;

[0035] The ventilation pipe is arranged on the connecting pipe and communicates with airway two. Airway two is located inside the connecting pipe and is connected to an external air inflation pump through the ventilation pipe. After the air inflation pump is started, the airbag inflates and expands, pressing the suction pipe tightly against the inner wall of the cylinder. Since the inner wall of the cylinder is equipped with a lining plate with a wavy surface, the airbag expands to make the suction pipe always fit the lining plate, realizing the scraping and cleaning of the lining plate. When the lining plate and the suction pipe move relative to each other, the protruding part of the lining plate will squeeze the suction pipe, and then squeeze the airbag. At this time, the pressurized gas in airway one is discharged into the channel through the pressure relief valve. Through this design, the suction pipe can always fit the lining plate and move with the change of its surface shape to ensure effective scraping and cleaning of the lining plate;

[0036] When the suction pipe rotates, since the suction pipe fits on the inner wall of the lining plate, the protruding part of the lining plate will squeeze the suction pipe, and then squeeze the airbag. At this time, the pressurized gas in airway one is discharged into the channel through the pressure relief valve. Since the inside of the channel is filled with a liquid medium, after the pressurized gas accesses the channel, it can increase the pressure inside the channel, thereby increasing the impact force of the liquid medium; since the surface of the lining plate is wavy, the lining plate can periodically squeeze the suction pipe, that is, the impact force of the liquid medium increases periodically, increasing the spraying coverage range of the liquid medium and improving the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0038] Figure 2 is a schematic cross-sectional view of the present invention's pulping equipment from the first perspective;

[0039] Figure 3 is a schematic cross-sectional view of the present invention's pulping equipment from the second perspective;

[0040] Figure 4 is a schematic structural diagram of the present invention's fine grinding equipment;

[0041] Figure 5 It is a schematic cross-sectional view of the first perspective of the fine grinding equipment of the present invention;

[0042] Figure 6 is Figure 5 a schematic enlarged view of the structure at A in

[0043] Figure 7 It is a schematic cross-sectional view of the second perspective of the fine grinding equipment of the present invention;

[0044] Figure 8 is Figure 7 a schematic enlarged view of the structure at A in

[0045] Figure 9 It is a schematic cross-sectional view of the suction pipe of the present invention.

[0046] In the figure: 1, grinding part; 2, discharging part; 3, pressure supply component; 4, paste slurry part; 5, stirring and mixing part; 6, stirring cylinder; 7, discharging component; 8, driving component three;

[0047] 11, base frame; 12, cylinder body; 13, first gear ring; 14, first gear; 15, first motor; 16, lining plate;

[0048] 21, suction pipe; 22, rotating head; 23, connecting pipe; 24, pipeline; 25, driving component two; 26, suction hole; 27, rubber scraping strip; 28, channel;

[0049] 31, first air duct; 32, second air duct; 33, airbag; 34, pressure relief valve;

[0050] 251, second gear ring; 252, second motor; 253, second gear;

[0051] 41, first chamber; 42, first stirring frame; 43, liquid inlet pipe; 44, liquid outlet hole; 45, baffle;

[0052] 51, second chamber; 52, second stirring frame;

[0053] 71, discharging pipe; 72, discharging pump; 73, electric telescopic pipe fitting;

[0054] 81, top plate; 82, third gear; 83, third motor; 84, fourth gear. Specific embodiments

[0055] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0056] Figure 1An embodiment of the mechanical device for preparing boron carbide powder according to the present invention is shown, which includes a pulping device for preparing boron carbide slurry for wet grinding and a fine grinding device for finely grinding the boron carbide slurry for wet grinding;

[0057] The pulping device includes a stirring cylinder 6, a paste slurry part 4 arranged inside the stirring cylinder 6 for preparing paste boron carbide slurry, and a stirring and mixing part 5 arranged inside the stirring cylinder 6 for stirring and mixing the paste boron carbide slurry into boron carbide slurry for wet grinding; wherein, the pulping device is designed such that the stirring and mixing part 5 simultaneously stirs and mixes the inside of the paste slurry part 4 during operation;

[0058] During actual use, boron carbide powder is added to the paste slurry part 4, a liquid medium is introduced into the paste slurry part 4, and paste boron carbide slurry is prepared by stirring; subsequently, the paste boron carbide slurry inside the paste slurry part 4 enters the stirring and mixing part 5, a liquid medium is introduced into the stirring and mixing part 5, at the same time boron carbide powder is added to the paste slurry part 4, a liquid medium is introduced into the paste slurry part 4, and during stirring, the mixture of the paste boron carbide slurry and the liquid medium inside the stirring and mixing part 5 can be stirred to prepare boron carbide slurry for wet grinding, and the mixture of the boron carbide powder and the liquid medium inside the paste slurry part 4 can be stirred to prepare paste boron carbide slurry; that is, the synchronous preparation of the paste boron carbide slurry and the boron carbide slurry for wet grinding is realized, and at the same time, the purpose of improving the mixing efficiency by using the pre-wetting method when preparing the boron carbide slurry for wet grinding is achieved.

[0059] In order to improve the mixing and dispersion effect, an active agent can be added to the liquid medium to prevent agglomeration.

[0060] Figures 2-3 An embodiment of the paste slurry part 4 according to the present invention is shown. The paste slurry part 4 includes: a chamber one 41 arranged inside the stirring cylinder 6, a stirring frame one 42 rotatably arranged inside the chamber one 41, a liquid inlet pipe 43 rotatably arranged on the top of the stirring frame one 42 for introducing a liquid medium into the inside of the stirring frame one 42, a liquid outlet hole 44 arranged on the side of the stirring frame one 42 and communicated with the liquid inlet pipe 43, and a baffle 45 rotatably arranged outside the stirring frame one 42 and inside the chamber one 41; a water pump is externally connected to the liquid inlet pipe 43 to extract the liquid medium; the chamber one 41 is communicated with a feed pipe, and the boron carbide powder is added into the inside of the chamber one 41 through the feed pipe;

[0061] During actual use, boron carbide powder is added into the chamber one 41, and then the liquid medium is added into the inside of the stirring frame one 42 through the liquid inlet pipe 43, so that the liquid medium is ejected through the liquid outlet hole 44, that is, the liquid medium is added into the chamber one 41, and after the stirring frame one 42 rotates, the mixture of the boron carbide powder and the liquid medium inside the chamber one 41 can be stirred to prepare paste boron carbide slurry.

[0062] Figures 2-3 Fig. 2 shows an embodiment of the stirring and mixing part 5 proposed by the present invention. The stirring and mixing part 5 includes: a second chamber 51, which is arranged inside the stirring cylinder 6 and communicated below the first chamber 41, and a second stirring frame 52, which is rotatably arranged inside the second chamber 51 and fixedly connected to the bottom of the first stirring frame 42;

[0063] The baffle 45 moves upward. At this time, the first chamber 41 and the second chamber 51 are communicated, and the liquid medium is ejected through the liquid outlet hole 44. The pasty boron carbide slurry inside the first chamber 41 enters the inside of the second chamber 51 through the scouring action of the liquid medium. At the same time, the inside of the first chamber 41 is cleaned through the scouring action of the liquid medium, so as to achieve the purpose of adding the pasty boron carbide slurry and the liquid medium into the second chamber 51;

[0064] Subsequently, the baffle 45 moves downward to close the first chamber 41. At this time, boron carbide powder is added into the first chamber 41. Subsequently, the liquid medium is added into the first stirring frame 42 through the liquid inlet pipe 43. After the first stirring frame 42 rotates, it drives the second stirring frame 52 to rotate synchronously, so as to achieve the synchronous preparation of the pasty boron carbide slurry and the boron carbide slurry for wet grinding, and at the same time achieve the purpose of improving the mixing efficiency by using the pre-wetting method when preparing the boron carbide slurry for wet grinding.

[0065] Figures 2-3 Fig. 3 shows a further description of the pulping equipment proposed by the present invention. The pulping equipment further includes: a discharging assembly 7, which is arranged at the bottom of the stirring cylinder 6 and used to send the boron carbide slurry for wet grinding into the fine grinding equipment, and a third driving assembly 8, which is arranged on the stirring cylinder 6 and used to drive the first stirring frame 42 to rotate and move up and down;

[0066] The discharging assembly 7 sends the boron carbide slurry for wet grinding inside the second chamber 51 into the fine grinding equipment, and drives the first stirring frame 42 and the second stirring frame 52 to rotate through the third driving assembly 8;

[0067] The discharging assembly 7 includes: a discharging pipe 71 communicated with the bottom of the second chamber 51, a discharging pump 72 and an electromagnetic valve arranged inside the discharging pipe 71, and an electric telescopic pipe fitting 73 arranged inside the discharging pipe 71; when discharging, the electric telescopic pipe fitting 73 extends. After aligning with the feeding port of the fine grinding equipment, the electromagnetic valve is opened and the discharging pump 72 operates, so as to send the boron carbide slurry for wet grinding inside the second chamber 51 into the fine grinding equipment;

[0068] The electric telescopic pipe fitting 73 includes a telescopic pipe arranged on the discharging pipe 71 and an electric push rod I arranged on the telescopic pipe. The telescopic movement of the electric push rod I drives the pipe orifice of the discharging pipe 71 to move, so as to realize the alignment and separation of the pipe orifice of the discharging pipe 71 and the feeding port of the fine grinding equipment;

[0069] The driving component three 8 includes: a top plate 81 arranged above the mixing drum 6 through an electric push rod two, a third gear 82 fixedly connected to the first mixing frame 42, a third motor 83 arranged on the top plate 81, and a fourth gear 84 fixedly connected to the output end of the third motor 83; the first mixing frame 42 is rotatably connected to the inside of the top plate 81, and the first mixing frame 42 is slidably connected to the inside of the mixing drum 6;

[0070] After the electric push rod two is started, it can drive the first mixing frame 42 to move up and down, and thus can synchronously drive the baffle 45 to move up and down;

[0071] After the third motor 83 is started, it drives the first mixing frame 42 to rotate through the fourth gear 84 and the third gear 82, and thus can synchronously drive the second mixing frame 52 to rotate;

[0072] During mixing, since the baffle 45 is located inside the mixing drum 6, the first mixing frame 42 will not drive the baffle 45 to rotate when rotating; when adding the paste boron carbide slurry inside the first chamber 41 into the second chamber 51, the baffle 45 moves upward, so that the baffle 45 is separated from the mixing drum 6. At this time, when the first mixing frame 42 rotates, affected by the frictional force between the first mixing frame 42 and the baffle 45, the baffle 45 rotates synchronously. After the baffle 45 rotates, through the centrifugal force of the baffle 45, it is convenient to send the paste boron carbide slurry to the communication position between the first chamber 41 and the second chamber 51, that is, it is convenient to send the paste boron carbide slurry into the second chamber 51.

[0073] Figure 4 The embodiment of the fine grinding equipment proposed by the present invention is shown, including a grinding part 1 and a discharging part 2. The grinding part 1 includes:

[0074] A base frame 11, as the support frame of the equipment, bears the main components;

[0075] A cylinder 12, horizontally installed on the top of the base frame 11 and capable of rotating; a feeding port is arranged on the side of the cylinder 12, and the feeding port and the discharging assembly 7 are used in combination to inject the wet grinding boron carbide slurry made by the pulping equipment into the inside of the cylinder 12; a cover is arranged at the feeding port, and the cover is opened when adding the wet grinding boron carbide slurry and closed during grinding;

[0076] A first driving component, installed on the base frame 11, for driving the cylinder 12 to rotate;

[0077] The wet grinding boron carbide slurry enters the cylinder 12 through the feeding port, and the cylinder 12 rotates driven by the first driving component, and the internal grinding medium grinds the wet grinding boron carbide slurry, so as to realize the fine grinding of the material.

[0078] According to Figure 4 As shown, the first driving component includes:

[0079] The first toothed ring 13 is fixed to the outside of the cylinder 12 and rotates synchronously with the cylinder 12;

[0080] The first gear 14 meshes with the first toothed ring 13 and is used to transmit power;

[0081] The first motor 15 provides power and drives the first gear 14 to rotate after starting;

[0082] After the first motor 15 starts, it drives the first gear 14 to rotate. The first gear 14 drives the first toothed ring 13 to rotate through meshing with the first toothed ring 13. The first toothed ring 13 drives the cylinder 12 to rotate, thereby realizing the grinding process of the wet grinding boron carbide slurry by the grinding medium inside the cylinder.

[0083] Figures 4-6 An embodiment of the discharging part 2 is shown. The discharging part 2 includes: a suction pipe 21, a rotating head 22, a connecting pipe 23, a pipeline 24 and a second driving assembly 25; the suction pipe 21 is rotatably arranged along the axis of the cylinder 12 and is attached to the inside of the cylinder 12. Two rotating heads 22 are respectively 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 assembly 25 can drive the rotating head 22 to rotate; a negative pressure mechanism is externally connected to the suction pipe 21;

[0084] During the discharging process, the negative pressure mechanism starts, generating negative pressure inside the suction pipe 21, thereby pumping out the ground slurry inside the cylinder 12 to realize discharging. When the ground slurry is completely discharged, the second driving assembly 25 drives the rotating head 22 to rotate, and then makes the suction pipe 21 rotate along the axis of the cylinder 12, using the suction pipe 21 to scrape and clean the inner wall of the cylinder 12.

[0085] In order to enhance the scraping effect of the suction pipe 21, a rubber scraping strip 27 is installed on the suction pipe 21. In addition, since the grinding medium is usually spherical and small in size, to prevent the grinding medium from blocking the suction holes 26 of the suction pipe 21 when the ground slurry is discharged, the suction holes 26 are designed as ellipses or triangles.

[0086] The second driving assembly 25 includes a second toothed ring 251 fixedly connected to the rotating head 22, a second motor 252 arranged on the base frame 11, and a second gear 253 fixed on the output shaft of the second motor 252. After the second motor 252 starts, it drives the second gear 253 to rotate, thereby driving the second toothed ring 251 to rotate, and then synchronously driving the rotating head 22 to rotate.

[0087] Figures 6-9 An embodiment of the pressure supply assembly 3 is shown. The pressure supply assembly 3 includes: an air duct 31, an air duct 32, an airbag 33 and a pressure relief valve 34; a partition is provided inside the suction pipe 21, dividing the suction pipe 21 into two parts: an air duct 31 and a channel 28;

[0088] A pressure relief valve 34 is installed on the air passage 31. When the pressure relief valve 34 releases gas, the gas will enter the passage 28. The material suction hole 26 is connected to the passage 28. When the negative pressure mechanism is activated, a negative pressure is generated in the passage 28, and the ground slurry is sucked into the passage 28 through the material suction hole 26. Subsequently, the ground slurry enters the pipeline 24 through the connecting pipe 23 and is discharged.

[0089] The ventilation pipe is arranged on the connecting pipe 23 and is communicated with the air passage 32. The air passage 32 is located inside the connecting pipe 23 and is connected to an external air inflation pump through the ventilation pipe. After the air inflation pump is activated, the airbag 33 is inflated and expanded, so that the material suction pipe 21 is tightly pressed against the inner wall of the cylinder body 12. Since the cylinder body 12 is equipped with a lining plate 16 with a wavy surface, the material suction pipe 21 is always attached to the lining plate 16 after the airbag 33 is inflated, realizing scraping and cleaning of the lining plate 16. When the lining plate 16 and the material suction pipe 21 move relative to each other, the convex part of the lining plate 16 will squeeze the material suction pipe 21, and then squeeze the airbag 33. At this time, the pressurized gas in the air passage 31 is discharged into the passage 28 through the pressure relief valve 34.

[0090] Through this design, the material suction pipe 21 can always be attached to the lining plate 16 and move with the change of its surface shape, ensuring effective scraping and cleaning of the lining plate 16.

[0091] During discharging, the negative pressure mechanism is activated, making the inside of the passage 28 become negative pressure. When the material suction hole 26 is blocked, the gas discharged through the pressure relief valve 34 can be used to compensate the pressure inside the passage 28 to avoid damage to the negative pressure mechanism.

[0092] During the grinding operation, the driving component two 25 drives the rotating head 22 to rotate, making the material suction pipe 21 move to the top of the cylinder body 12, thus avoiding the influence of the material suction pipe 21 on the normal movement of the grinding medium during the grinding operation. After the material suction pipe 21 moves to the top of the cylinder body 12, the air inflation pump stops operating. At this time, the material suction pipe 21 squeezes the airbag 33 under the action of gravity, making the airbag 33 compressed. At this time, there is a certain distance between the material suction pipe 21 and the lining plate 16, which can avoid the material suction pipe 21 from hindering the rotation of the cylinder body 12.

[0093] There are two connecting pipes 23. Both connecting pipes 23 are communicated with the material suction pipe 21. Both connecting pipes 23 are communicated with a pipeline 24. One of the pipelines 24 is externally connected to a negative pressure mechanism, and the other pipeline 24 is externally connected to a delivery pump; electromagnetic valves are arranged on the pipelines 24.

[0094] During discharging, the electromagnetic valve on the pipeline 24 connected to the negative pressure mechanism is opened, and the other electromagnetic valve is closed. After the negative pressure mechanism is activated, a negative pressure is generated inside the material suction pipe 21, and the material can be sucked into the inside of the material suction pipe 21 to realize discharging.

[0095] After the discharging is completed, since the ground slurry has a certain viscosity, a large amount of the ground slurry adheres to the grinding medium and the suction pipe 21. At this time, a liquid medium can be injected into the interior of the cylinder body 12 to dilute the ground slurry, and at the same time, the grinding medium, the suction pipe 21 and the inner wall of the lining plate 16 can be flushed with the liquid medium, so as to clean the slurry. If the viscosity of the slurry is too high and it is difficult to extract, the liquid medium can be injected into the interior of the cylinder body 12 to dilute the slurry.

[0096] Specifically, after the discharging is completed, the suction pipe 21 rotates to the top of the cylinder body 12. At this time, the solenoid valve on the pipeline 24 connecting the delivery pump is opened, and the other solenoid valve is closed. After the delivery pump is started, the liquid medium is introduced into the interior of the suction pipe 21, so that the liquid medium sprays out through the suction holes 26, and thus the suction holes 26, the grinding medium, the suction pipe 21 and the inner wall of the lining plate 16 can be flushed with the liquid medium.

[0097] In order to improve the flushing effect, when flushing, the driving assembly two 25 can be used to drive the suction pipe 21 to rotate inside the cylinder body 12, so that the liquid medium sprays out more evenly.

[0098] There are two groups of suction holes 26, and the two groups of suction holes 26 are symmetrically arranged. One group of suction holes 26 is arranged near both sides of the rubber squeegee 27. When the liquid medium sprays out from the suction holes 26, the liquid medium sprayed out from one group of suction holes 26 sprays on the grinding medium to flush the grinding medium, and the liquid medium sprayed out from the other group of suction holes 26 sprays on the inner wall of the lining plate 16 to flush the inner wall of the lining plate 16.

[0099] When flushing, the pressure supply assembly 3 can be started to make the suction pipe 21 fit against the inner wall of the lining plate 16. When one group of suction holes 26 sprays out the liquid medium, the liquid medium impacts on the inner wall of the lining plate 16. Since the distance between the suction pipe 21 and the lining plate 16 is small, the liquid medium can rebound onto the suction pipe 21, thereby realizing the flushing of the suction pipe 21.

[0100] When the suction pipe 21 rotates, since the suction pipe 21 fits against the inner wall of the lining plate 16, the convex part of the lining plate 16 will squeeze the suction pipe 21, and then squeeze the airbag 33. At this time, the pressurized gas in the air passage one 31 is discharged into the passage 28 through the pressure relief valve 34. Since the interior of the passage 28 is filled with the liquid medium, after the pressurized gas accesses the passage 28, the pressure inside the passage 28 can be increased, 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 pipe 21, that is, the impact force of the liquid medium increases periodically, increasing the spraying coverage range of the liquid medium and improving the flushing effect.

[0101] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center, upper, lower, left, right, vertical, horizontal, inner, outer" are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first, second, third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0102] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "install, connect, couple" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0104] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the 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 all fall within the protection scope of the present invention.

Claims

1. Boron carbide powder preparation machine, characterized in that: include: Slurrying equipment for preparing boron carbide slurry for wet grinding, and Fine grinding equipment for fine grinding of boron carbide slurry for wet grinding; The pulping equipment comprises: Mixing drum (6), A paste slurry section (4) is arranged inside the stirring drum (6) and is used to prepare a paste boron carbide slurry, and a stirring and mixing section (5) is arranged inside the stirring drum (6) and is used to stir and mix the paste boron carbide slurry into a boron carbide slurry for wet grinding; The pulping equipment is designed such that the stirring and mixing section (5) simultaneously stirs and mixes the inside of the paste slurry section (4) during operation.

2. The boron carbide powder preparation machine according to claim 1, characterized in that: The paste slurry part (4) comprises: Chamber 1 (41) is arranged inside the mixing drum (6). A stirring frame (42) is rotatably disposed inside the chamber (41). The liquid inlet pipe (43) is rotatably arranged on the top of the stirring frame (42) and is used to introduce the liquid medium into the interior of the stirring frame (42). The liquid outlet (44) is arranged on the side of the stirring frame (42) and is connected to the liquid inlet pipe (43), and the baffle (45) is rotatably arranged outside the stirring frame (42) and located inside the chamber (41).

3. The boron carbide powder preparation machine according to claim 2, characterized in that: The stirring and mixing section (5) comprises: The second chamber (51) is arranged inside the mixing drum (6) and is connected to the bottom of the first chamber (41); and The second stirring frame (52) is rotatably arranged inside the second chamber (51) and is fixedly connected to the bottom of the first stirring frame (42).

4. The boron carbide powder preparation machine according to claim 3, characterized in that: The pulping equipment also includes: A discharge assembly (7) is arranged at the bottom of the mixing drum (6) and is used to deliver the boron carbide slurry for wet grinding into the fine grinding equipment, and The driving assembly three (8) is arranged on the mixing drum (6) and is used to drive the mixing frame one (42) to rotate and move up and down.

5. The boron carbide powder preparation machine according to claim 1, characterized in that: The fine grinding device comprises: a grinding part (1), which grinds the slurry by means of grinding media arranged 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.

6. The boron carbide powder preparation machine according to claim 5, 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).

7. The boron carbide powder preparation machine according to claim 6, 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).

8. The boron carbide powder preparation machine according to claim 7, characterized in that: A lining plate (16) is arranged inside the cylinder (12), and a pressure supply assembly (3) is arranged 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).

9. The boron carbide powder preparation machine according to claim 8, 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).

10. The boron carbide powder preparation machine according to claim 9, 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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