Device for removing special-shaped particles in micron-sized powder

Abstract

The utility model discloses a device for removing special-shaped particles in micron-sized powder, relates to the technical field of diamond powder purification equipment, and solves the problem that in the prior art, diamond powder is shaped in a ball-milling shaping manner, so that the quality of the powder is reduced. The device comprises a negative pressure suction system, the negative pressure suction system is connected with an annular precision electric forming screen, the annular precision electric forming screen is fixedly connected with a supporting frame fixedly arranged on the ground, a stirring mechanism is arranged on the supporting frame, and the annular precision electric forming screen and the stirring end of the stirring mechanism are both arranged in an open container. The open container is arranged on the lifting moving platform, and the lifting moving platform can drive the open container to move up and down; a supply system is arranged on the supporting frame and matched with the open container. According to the utility model, the special-shaped particles smaller than the aperture are extracted by adopting a negative pressure suction filtration mode, the sharpness of the cutting angle of the particles with normal specifications is kept, the strip-shaped, needle-rod-shaped and other special-shaped particles influencing the final quality of micro powder are reduced or even completely eradicated, the yield of the target particles is maximized, and the quality of the shaped particles is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to diamond powder purification equipment technical field, especially point to a kind of device for removing irregular particle in micron powder. BACKGROUND

[0002] As a kind of high-performance materials, diamond micro powder has been widely used in many fields in recent years, and shows strong development momentum, including clean energy, consumer electronics, semiconductor, ceramic stone, oil and gas exploitation, geological drilling and machining etc. Especially the application in precision machining field, such as the precision polishing of computer hard disk, semiconductor wafer, optical fiber connector etc., the requirement of diamond micro powder is higher and higher, not only to ensure the processing efficiency, but also to consider the processing accuracy, not only to control particle size, purity, roundness and other indicators, but also to strictly control the particle morphology such as uniformity and sharpness.

[0003] The production of diamond micro powder generally uses diamond raw material with conventional particle size of 100-500 microns, which is broken by airflow to form diamond micro powder particles with particle size less than 80 microns. Airflow breaking is to realize the rapid breaking of raw material under the impact of high-speed airflow, and long strip, flaky, needle bar and other particles are produced in the breaking process. The diameter of such strip, needle and bar particles is about 1 / 3 or less of the average particle diameter. In order to remove these irregular particles, the current common method is to remove them by shaping, that is, to remove them by rolling breaking with different proportions of steel balls, and then to realize the classification of particle size by using gravity flotation and other methods. But the finished particles obtained by this method are blunt due to the impact of steel balls, which reduces the cutting force.

[0004] The Chinese utility model patent with publication number CN220547042U discloses a diamond micro powder ball milling shaping device. A ball milling tank body is rotatably arranged above the discharge hopper of the device, a feeding and discharging hole is formed in the ball milling tank body, a cover plate is detachably arranged at the feeding and discharging hole, and a plurality of grinding media are arranged in the ball milling tank body. A plurality of vibration motors are annularly arranged on the outer side wall of the ball milling tank body, a rear end shaft and a front end shaft are respectively arranged at the left and right ends of the ball milling tank body, and a conductive slip ring is sleeved on the rear end shaft. A driving support is arranged on one side of the discharge hopper, and a driving mechanism for driving the ball milling tank body to rotate is arranged on the driving support.

[0005] The device can make the diamond micro powder adhered to the inner wall of the ball milling tank body fall off, so as to achieve the purpose that the materials in the ball milling tank body can be ground by the grinding media to achieve shaping, prevent the phenomenon of shaping dead angle, and improve the shaping efficiency of diamond micro powder and the uniformity of particle morphology.

[0006] However, in this scheme, the finished product particles are still obtained in a ball milling manner. In the ball milling process, the cutting angle of the diamond powder particles becomes blunt after being hit by the ball milling medium such as a steel ball, which reduces the cutting force and further reduces the overall quality of the diamond powder. At the same time, due to the large mass of the diamond powder, the feeding and discharging in the batch production scene is not convenient, which leads to high labor intensity. Practical new type content

[0007] In view of the deficiencies in the above background art, the present application provides a device for removing irregular particles in micron-sized powder, which solves the problem of reducing the quality of the powder caused by the shaping of the diamond powder in the prior art by ball milling.

[0008] The technical scheme of the present application is as follows: a device for removing irregular particles in micron-sized powder, comprising a negative pressure suction system, the negative pressure suction system being connected with an annular precision electroforming screen, the annular precision electroforming screen being fixedly connected with a support frame fixed on the ground, a stirring mechanism being arranged on the support frame, the annular precision electroforming screen and the stirring end of the stirring mechanism being arranged in an open container, the open container being arranged on a lifting moving platform, the lifting moving platform being capable of driving the open container to move up and down; a replenishment system being arranged on the support frame and cooperating with the open container.

[0009] Preferably, the negative pressure suction system comprises a vacuum container, the liquid inlet end of the vacuum container being connected with the annular precision electroforming screen through a negative pressure suction pipe, the vacuum container being connected with a vacuum pump through a vacuum pipe, and a gas release valve being arranged on the vacuum container.

[0010] Preferably, the lower part of the vacuum container is a funnel part, the lower end of the funnel part being connected with a barrel through a discharge pipe. An electromagnetic valve is arranged on the vacuum pipe, the liquid inlet end and the discharge pipe.

[0011] Preferably, the annular precision electroforming screen is an annular box body or a spiral pipe arranged in a ring shape and communicating with the negative pressure suction pipe inside, and a plurality of filter holes are formed in the box wall or the pipe wall of the annular box body or the spiral pipe.

[0012] Further, the filter hole diameter is N, the micron-sized powder particle size is M, N < M and 3N > M.

[0013] Preferably, the replenishment system comprises a liquid level controller, the liquid level controller being fixedly arranged on the support frame and located in the open container, the liquid level controller cooperating with a water supply pipe, the water supply pipe being connected with a water storage container, and a liquid pump being arranged on the water supply pipe.

[0014] Preferably, the position of the liquid level controller corresponds to the top position of the annular precision electroforming screen; and the water storage container contains water or a dispersant solution.

[0015] Preferably, the lifting moving platform comprises a bearing plate, and a hydraulic lifting support is arranged at the bottom of the bearing plate and is arranged on the trolley.

[0016] Preferably, the stirring mechanism comprises an electric stirring paddle, and a paddle blade of the electric stirring paddle extends into the open container.

[0017] The utility model discloses a beneficial effect: through setting up lifting moving platform can drive open container up and down movement, and cooperate with the fixed support frame of setting and setting stirring mechanism and annular precision electroforming screen effect under the support frame, realize flexible unloading and loading of the material in open container, reduce loading and unloading difficulty, avoid the problem of turnover difficulty. Through setting up negative pressure suction system and annular precision electroforming screen cooperation, can be filled in open container with the material of suction filtration form carries out quick filtration and removes the impurity. Through setting up the replenishment system can add specified medium to the material in open container, thereby favoring filtration, and through the cooperation with stirring mechanism, realize the material in open container and avoid the annular precision electroforming screen and cause the blockage, influence filtration effect. The utility model discloses adopt negative pressure suction filtration mode and extract the special-shaped particle less than the aperture, keep normal specification particle cutting angle sharpness, reduce even completely eliminate long strip, needle stick and other influence micro powder final quality's particle, make target particle yield maximization, improve the particle quality after shaping. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the utility model embodiment, the following will be needed to use the drawing in the embodiment description briefly introduced, obviously, the following description in the drawing is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 It is the whole structure schematic diagram of the utility model;

[0020] Figure 2 It is the annular precision electroforming screen three-dimensional structure schematic diagram of the utility model;

[0021] Figure 3 It is the annular precision electroforming screen section structure schematic diagram of the utility model;

[0022] In the diagram: 1: Negative pressure suction system, 2: Annular precision electroforming screen, 3: Support frame, 4: Stirring mechanism, 5: Open container, 6: Lifting and moving platform, 7: Supply system, 11: Vacuum container, 12: Negative pressure suction pipe, 13: Vacuum pipe, 14: Vacuum pump, 15: Vent valve, 16: Funnel section, 17: Material cylinder, 18: Solenoid valve, 71: Liquid level controller, 72: Water supply pipe, 73: Water storage container, 74: Liquid pump, 61: Bearing plate, 62: Hydraulic lifting support, 63: Trolley. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , 2 As shown in Example 1, an apparatus for removing irregularly shaped particles from micron-sized powder includes a negative pressure suction system 1 connected to an annular precision electroforming screen 2. The annular precision electroforming screen 2 is fixedly connected to a support frame fixed on the ground. A stirring mechanism 4 is provided on the support frame. The stirring ends of both the annular precision electroforming screen 2 and the stirring mechanism 4 are located inside an open container 5. The open container is used to hold the slurry of micron-sized diamond powder particles to be processed. The open container 5 is mounted on a lifting and moving platform 6, which can move the open container 5 up and down, controlling the engagement and disengagement states of the open container with the stirring mechanism and the annular precision electroforming screen. This allows the open container to be moved to the processing engagement position before and after processing, facilitating flexible unloading and loading of materials in the open container, reducing loading and unloading difficulties, and avoiding turnover difficulties.

[0025] Additionally, a supply system 7 is provided on the support frame, which cooperates with the open container 5. The stirring mechanism 4 can be a conventional electric stirring paddle, with its blades extending into the open container 5. In this embodiment, the supply system 7 is used to add liquid medium to the open container, which can be water or a dispersant solution, thereby further mixing with the powder slurry in the open container. Under the continuous stirring of the paddle of the stirring mechanism, clogging of the annular precision electroforming screen is avoided, thus preventing the filtration effect from being affected. As a further optional embodiment, the stirring mechanism can be a conventional ultrasonic stirring rod, which uses ultrasonic vibration to mix the diamond powder slurry inside evenly.

[0026] In use, the negative pressure suction system cooperates with the annular precision electroforming screen to quickly filter and remove impurities from the powder particle slurry contained in the open container in the form of suction filtration. The negative pressure suction method can extract the irregular particles smaller than the pore size along with the liquid medium, avoiding the wear of the target particles caused by the conventional ball milling method, maintaining the sharpness of the normal specification particle cutting angle, reducing or even completely eliminating the long strip, needle rod and other particles that affect the quality of the final powder, maximizing the yield of the target particles and improving the quality of the shaped particles.

[0027] As a further specific embodiment, the lifting mobile platform 6 can be a conventional scissor lifting platform cart. The lifting mobile platform 6 of the embodiment includes a bearing plate 61, the bottom of which is provided with a hydraulic lifting support 62, which is arranged on a cart 63. Specifically, the hydraulic lifting support can be selected from the support disclosed in the invention patent with publication number CN103950866A. By extending the hydraulic cylinder thereon, the bearing plate arranged at the top of the hydraulic lifting support is driven to move up and down, and in turn drives the open container arranged on the bearing plate to lift, thereby controlling the cooperation or separation of the open container with the annular precision electroforming screen and the stirring mechanism.

[0028] In embodiment 2, on the basis of embodiment 1, the negative pressure suction system 1 includes a vacuum container 11, the liquid inlet end of which is connected with the annular precision electroforming screen 2 through a negative pressure suction pipe 12, the vacuum container 11 is connected with a vacuum pump 14 through a vacuum pipe 13, and the vacuum container 11 is provided with a gas release valve 15.

[0029] In the embodiment, the vacuum pump, the gas release valve and the liquid inlet end are all arranged at the top of the vacuum container. The negative pressure is generated by the vacuum pump to the vacuum container, and the negative pressure is transmitted to the annular precision electroforming screen through the negative pressure suction pipe to generate suction force, so that the irregular particles smaller than the pore size are suction filtered into the vacuum container along with the liquid medium by the filtering action of the annular precision electroforming screen 2. The negative pressure feeding method can avoid the wear of the pump by the irregular particles.

[0030] In addition, in the embodiment, the lower part of the vacuum container 11 is a funnel part 16, the lower end of which is connected with a barrel 17 through a discharge pipe. The funnel-shaped funnel part can facilitate discharge, so that the mixture of irregular particles and liquid medium in the vacuum container can be discharged into the barrel when the liquid level reaches a set height.

[0031] In the embodiment, an electromagnetic valve 18 is arranged on each of the vacuum pipe 13, the liquid inlet end and the discharge pipe. During processing, the opening and closing of the corresponding pipeline or port are controlled by controlling the corresponding electromagnetic valve.

[0032] The embodiment 3 is based on the embodiment 2, the annular precision electroforming screen 2 is an annular box or a spiral pipe arranged in a ring shape and communicating with the negative pressure suction pipe 12, and a plurality of filter holes are formed on the wall of the annular box or the spiral pipe. As shown in FIGS. 3 and 4, the annular box includes an outer ring surface 21, a plurality of arc-shaped plates 22 are fixedly arranged on the inner side of the outer ring surface 21 in a circumferential direction, and the arc-shaped plates 22 are closed by end plates 23 between two ends, so as to form a plurality of suction filter cavities, the suction filter cavities are communicated with pipes 24, and the pipes are communicated with the negative pressure suction pipe 12. A plurality of filter holes are formed on the arc-shaped plates and the outer ring surface by laser forming, so that the negative pressure generated by the negative pressure suction pipe can be transmitted to the suction filter cavities and filtered through the filter holes. Figure 2 、 3 The annular box includes an outer ring surface 21, a plurality of arc-shaped plates 22 are fixedly arranged on the inner side of the outer ring surface 21 in a circumferential direction, and the arc-shaped plates 22 are closed by end plates 23 between two ends, so as to form a plurality of suction filter cavities, the suction filter cavities are communicated with pipes 24, and the pipes are communicated with the negative pressure suction pipe 12. A plurality of filter holes are formed on the arc-shaped plates and the outer ring surface by laser forming, so that the negative pressure generated by the negative pressure suction pipe can be transmitted to the suction filter cavities and filtered through the filter holes.

[0033] In the embodiment, the filter hole diameter is N, the micron-level diamond powder particle size is M, and the relationship between the diameter of the filter hole and the target particle size of the powder satisfies N < M and 3N > M, so that the special-shaped particles with a diameter of about 1 / 3 times or less of the average target particle size of the powder can be sucked out of the filter hole, and the target particles are prevented from being sucked out.

[0034] The embodiment 4 is based on the embodiment 3, the supply system 7 includes a liquid level controller 71 fixedly arranged on the support frame and located in the open container 5, the liquid level controller 71 is matched with a water inlet pipe 72, specifically, the liquid level controller is arranged at the end of the water inlet pipe, the water inlet pipe 72 is connected with a water storage container 73, and a liquid pump 74 is arranged on the water inlet pipe 72. In the embodiment, the liquid level controller can be a conventional floating ball liquid level controller, etc., the liquid level controller is fixedly arranged at the end of the water inlet pipe, and the water inlet pipe is also fixedly arranged on the support frame, so as to supply water or dispersant solution into the open container in a fixed posture. As a further optional solution, the liquid level controller is electrically connected with a control panel, and the control panel can control the opening and closing of the liquid pump.

[0035] In addition, the position of the liquid level controller 71 corresponds to the top position of the annular precision electroforming screen 2, that is, when the liquid level in the open container is lower than the top of the annular precision electroforming screen 2, the liquid level controller is triggered to send an electric signal, and the control panel controls the liquid pump to work after receiving the electric signal, so as to extract water or dispersant solution from the water storage container and inject it into the open container.

[0036] The specific use method of the embodiment is as follows:

[0037] First, the diamond powder particles containing needle-shaped, strip-shaped or rod-shaped particles are configured into a mixed slurry with a certain solid content, and then transferred to the open container and placed on the lifting moving platform, and moved to the position directly below the annular precision electroforming screen of the device, while ensuring that the water storage container contains pure water or a dispersant solution containing a dispersant.

[0038] II. Control the lifting of the lifting platform, drive the open container to move up, so that the mixed slurry in the open container is completely immersed in the annular precision electroforming screen, and at the same time, the stirring mechanism is opened, the stirring mechanism makes the mixed slurry in the open container completely dispersed and uniform, and at the same time, the liquid level controller is opened.

[0039] III. Open the negative pressure suction system, open the vacuum pump, open the electromagnetic valve on the vacuum pipe and the liquid inlet end, close the electromagnetic valve on the air exhaust valve and the discharge pipe, at this time the vacuum container forms negative pressure, under the action of negative pressure, the irregular particles smaller than the filter hole size of the annular precision electroforming screen in the material are extracted together with pure water or dispersant solution containing dispersant, at the same time, the vacuum pump and the electromagnetic valve should be controlled according to the material flow rate and the size of the container, the stirring state of the stirring mechanism can ensure that the filter hole of the annular precision electroforming screen is not blocked, at the same time, the liquid level controller of the replenishment system can replenish pure water or dispersant solution to the open container in time according to the liquid level, so as to ensure that the annular precision electroforming screen is always below the liquid level.

[0040] IV. After a certain period of time, when the liquid level in the vacuum container reaches a certain height, the vacuum pump stops working, the electromagnetic valve on the vacuum pipe is closed, at this time the electromagnetic valve on the discharge pipe and the air exhaust valve are opened, the extracted suspension containing needle-shaped, rod-shaped and strip-shaped irregular particles is put into the barrel, and according to the actual situation, the cycle processing can be repeated for many times until the irregular particles are processed.

[0041] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An apparatus for removing irregularly shaped particles from micron-sized powders, characterized in that: It includes a negative pressure suction system (1), which is connected to an annular precision electroforming screen (2). The annular precision electroforming screen (2) is fixedly connected to a support frame fixed on the ground. The support frame is equipped with a stirring mechanism (4). The stirring ends of the annular precision electroforming screen (2) and the stirring mechanism (4) are both located inside an open container (5). The open container (5) is set on a lifting and moving platform (6). The lifting and moving platform (6) can drive the open container (5) to move up and down. The support frame is equipped with a supply system (7), which works in conjunction with the open container (5).

2. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 1, characterized in that: The negative pressure suction system (1) includes a vacuum container (11). The liquid inlet of the vacuum container (11) is connected to the annular precision electroforming screen (2) through the negative pressure suction pipe (12). The vacuum container (11) is connected to the vacuum pump (14) through the vacuum pipe (13). The vacuum container (11) is equipped with a venting valve (15).

3. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 2, characterized in that: The lower part of the vacuum container (11) is a funnel part (16), and the lower end of the funnel part (16) is connected to the material cylinder (17) through a feeding pipe.

4. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 3, characterized in that: Solenoid valves (18) are provided on the vacuum tube (13), the liquid inlet end and the feed tube.

5. The apparatus for removing irregularly shaped particles from micron-sized powders according to any one of claims 2 to 4, characterized in that: The annular precision electroforming screen (2) is an annular box or spiral tube that is arranged in a ring shape and is connected to the negative pressure suction pipe (12) inside. Several filter holes are opened on the box wall or pipe wall of the annular box or spiral tube.

6. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 5, characterized in that: The filter pore size is N, the micron-sized powder particle size is M, N < M and 3N > M.

7. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 1 or 6, characterized in that: The supply system (7) includes a level controller (71), which is fixed on a support frame and located inside an open container (5). The level controller (71) is in conjunction with a water supply pipe (72), which is connected to a water storage container (73). A liquid pump (74) is provided on the water supply pipe (72).

8. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 7, characterized in that: The position of the liquid level controller (71) corresponds to the top position of the annular precision electroforming screen (2); the water storage container (73) contains water or dispersant solution.

9. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 1 or 8, characterized in that: The lifting and moving platform (6) includes a support plate (61), and a hydraulic lifting bracket (62) is provided at the bottom of the support plate (61). The hydraulic lifting bracket (62) is set on the trolley (63).

10. The apparatus for removing irregularly shaped particles from micron-sized powders according to claim 9, characterized in that: The stirring mechanism (4) includes an electric stirring paddle or an ultrasonic stirring paddle, the stirring end of which extends into the open container (5).

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