High-efficiency screening device and screening method for ITO (Indium Tin Oxide) slurry

Abstract

The invention relates to the technical field of screening equipment, and discloses an ITO slurry efficient screening device and a slurry screening method.The ITO slurry efficient screening device comprises a tank body, a feeding pipe, a screen and the like. A sieving chamber is formed in the tank body, and a sieving channel communicated with the sieving chamber is formed in the bottom end of the tank body; according to the screening device, the lower pipe opening of the feeding pipe faces the side face of the tank body, slurry, located above the screen, in the screening cavity forms a rotating vortex during feeding, sediments / large particles / foreign matter are driven to move, and the screen is prevented from being blocked. The whole sieving process is carried out in the sieving cavity defined by the tank body, the possibility that the slurry is scattered and overflown is avoided, meanwhile, after the slurry is fed, the pressure in the sieving cavity can be increased, and then the speed of the slurry passing through the screen is increased. And the slurry forming vortex is matched to fully ensure efficient sieving of the slurry.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, and in particular to an ITO slurry high-efficiency screening device and a slurry screening method. Background Art

[0002] ITO target is a black-gray ceramic semiconductor target made by molding and sintering indium oxide powder and tin oxide powder. It is an important raw material for producing ITO thin film. Before production, a large amount of powder raw materials need to be invested, emulsified and dispersed, and spray-dried to form an important semi-finished raw material for ITO target.

[0003] In the process, indium oxide powder and tin dioxide powder need to be emulsified and dispersed into slurry with water. Since the formed slurry may contain some undispersed large particles, impurities and foreign matter, in order to prevent the undispersed large particles, impurities and foreign matter in the slurry from entering the next process and affecting the product quality, the slurry needs to be screened during the slurry transfer process. However, the screening efficiency is further reduced, and the material is easily overflowed when the screen is blocked. It is very easy to cause material spillage and leakage during the material transfer process, resulting in material waste and affecting the cleanliness of the site.

[0004] SUMMARY OF THE INVENTION

[0005] The technical problem solved by the present invention is that since the slurry used as the raw material of the ITO target material is relatively thick and the large particles contained therein make the screen easy to be blocked, the slurry screening efficiency is low.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An ITO slurry high-efficiency screening device, comprising:

[0008] A tank body, wherein a sieving chamber is provided in the tank body, and a sieving channel communicating with the sieving chamber is provided at the bottom end of the tank body;

[0009] A feed pipe, the feed pipe passes through the tank body, and the connection position is sealed, and the outlet end of the feed pipe is located in the screening chamber and faces the side wall of the tank body;

[0010] A support plate, which is a hollow structure and is fixedly connected to the tank body via a fixing piece;

[0011] A screen is located between the support plate and the tank body and covers the screening channel.

[0012] In one embodiment of the present invention, a vibrator is fixedly connected to the tank body.

[0013] In one embodiment of the present invention, the tank body comprises a cover body and a surrounding edge that are detachably connected and mounted, and the feed pipe passes through the cover body.

[0014] In one embodiment of the present invention, a sealing ring is provided at the position where the cover body is connected to the surrounding edge.

[0015] In one embodiment of the present invention, the surrounding edge includes a side wall and a bottom wall of an integral structure, the screening channel is opened on the bottom wall, and the size of the screening channel is smaller than the size of the screening chamber.

[0016] In one embodiment of the present invention, a step portion is provided on a side of the bottom wall close to the screen, and an edge of the screen is located outside the step portion.

[0017] In one solution of the present invention: a convex strip is provided on a side of the support plate close to the screen, and an edge of the screen is located outside the convex strip.

[0018] In one embodiment of the present invention, the connection position of the fixing member is located outside the screen.

[0019] In one embodiment of the present invention, the fixing member is a bolt structure or a clamp structure.

[0020] A slurry screening method comprises the following steps:

[0021] Assemble the screening device as described above at a designated location;

[0022] Check the sealing of the other parts of the screening device except the screen position, the integrity of the screen and the stability of the screen installation;

[0023] Start the equipment, feed the slurry into the screening chamber, and ensure that the slurry first contacts the side wall of the tank body when entering the screening chamber, so that the slurry in the tank body forms a vortex;

[0024] During the operation of the equipment, regularly observe the working status of the equipment, the screening situation, and whether there is leakage between the support plate and the tank body;

[0025] After screening is completed, stop feeding, clean the inside of the tank and the screen, remove the debris accumulated on the screen and check whether the screen is damaged.

[0026] Beneficial effects of the present invention:

[0027] In the present application, the upper pipe mouth of the feed pipe uses a standard part docking interface to dock with various types of pipes, and the lower pipe mouth faces the side of the tank body. When feeding, the slurry located above the screen in the screening chamber forms a rotating vortex, which drives the sediment / large particles / foreign matter to move and avoid clogging the screen. Further, the center of the support plate can be set concave, such as setting the part corresponding to the support plate and the screening channel into a curved surface structure, and the shape of the screen is consistent with the shape of the support plate. Since the slurry that forms the vortex has low fluidity in the center position and the peripheral slurry flows faster, the central concave can be used to accommodate sediments and ensure the capacity to accommodate sediments, reduce the sediments in the outer circle of the screen and ensure the screening efficiency of the outer circle. The entire screening process is carried out in the screening chamber formed by the tank body, eliminating the possibility of slurry scattering and overflowing. At the same time, the pressure in the screening chamber will rise after the slurry is fed, thereby increasing the rate at which the slurry passes through the screen. The slurry that forms the vortex fully guarantees the efficient screening of the slurry.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of a part of the step portion of the present invention.

[0032] The reference numerals in the figure are: 1, tank body; 2, vibrator; 3, feed pipe; 4, support plate; 5, screen; 6, fixing part; 7, step portion; 8, convex strip. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] See also Figure 1-2 The present invention is an efficient screening device for ITO slurry, comprising: a tank body 1, a feed pipe 3 and a screen 5, etc. A screening chamber is provided in the tank body 1, and a screening channel connected to the screening chamber is provided at the bottom of the tank body 1; the screening process of the slurry is carried out in the screening chamber, which effectively prevents the material from being scattered and the slurry from being scattered. The tank body 1 can be a columnar structure, such as a cylindrical structure. A vibrator 2 can be fixedly connected to the tank body 1. Avoid the accumulation of debris on the screen 5 and block the screen 5, resulting in reduced screening efficiency.

[0037] See also Figure 1-2 In one embodiment of the present invention, the tank body 1 may include a cover body and a surrounding edge that can be detachably connected. The split tank body 1 is more convenient for processing the interior thereof when necessary, such as cleaning and cleaning after blockage. A sealing ring is provided at the connection position between the cover body and the surrounding edge to ensure the sealing performance of the connection position. The cover body and the surrounding edge can be fixedly installed by a clamp structure or other related structures.

[0038] See also Figure 1-2 In one embodiment of the present invention, the feed pipe 3 passes through the cover. Specifically, the upper end of the feed pipe 3 can be connected to the delivery pipe, the feed pipe 3 can pass through the cover and be fixedly sealed with the cover, the part of the feed pipe 3 located in the screening chamber can be bent so that the discharge port faces the side wall of the tank body 1, and the feed pipe 3 can be fixedly connected to the delivery pipe by a clamp and a sealing ring is provided to ensure the sealing of the connection position. The feed pipe 3 and the delivery pipe are provided to facilitate the docking connection between the equipment during use.

[0039] See also Figure 1-2In one embodiment of the present invention, the surrounding edge may include a side wall and a bottom wall of an integral structure, the screening channel is opened on the bottom wall, and the size of the screening channel is smaller than the size of the screening chamber, so that a connection portion may be formed outside the screening channel for connecting with the support plate 4, while ensuring the area for fixing the screen 5 to ensure the stability of the screen 5. A connection portion may also be formed outside the tank body 1 to connect with the support plate 4.

[0040] See also Figure 1-2 In one embodiment of the present invention, the support plate 4 is a hollow structure, and is fixedly connected to the tank body 1 by a fixing member 6; the screen 5 is located between the support plate 4 and the tank body 1, and covers the screening channel to screen the slurry. The support plate 4 can support the screen 5 to ensure the service life of the screen 5. The fixing member 6 can be a bolt structure or a clamp structure, etc., and other connection structures can also be used to fix the support plate 4 and the tank body 1. Preferably, the connection position of the fixing member 6 is located on the outside of the screen 5. In this way, the screen 5 can be avoided from being penetrated or damaged. As an example, the fixing member 6 includes eight bolts evenly distributed around the tank body 1. The bolts are located on the outside of the screen 5 to ensure the integrity of the screen 5. When in use, the bolts penetrate the support plate 4 and the connecting part in sequence to fix them.

[0041] See also Figure 1-2 In one embodiment of the present invention, a step portion 7 is provided on one side of the bottom wall close to the screen 5, and the step portion 7 is formed as an outward protrusion, and the edge of the screen 5 is located on the outside of the step portion 7. Furthermore, a convex strip 8 is provided on one side of the support plate 4 close to the screen 5, and the edge of the screen 5 is located on the outside of the convex strip 8. The convex strip 8 can be surrounded to form a ring outside the screening channel, and the convex strip 8 can be located on the inner side of the edge of the step portion 7. By providing the step portion 7 and the convex strip 8 structure, the tightness of the position after the support plate 4 is fixedly connected to the tank body 1 and the bite ability of the screen 5 are guaranteed, the stability of the screen 5 is fully guaranteed, and at the same time, the slurry leakage in the gap between the edge of the support plate 4 and the tank body 1 can be avoided.

[0042] Working principle of the present invention:

[0043] The slurry screening method based on the device includes the following steps: assembling the screening device at a designated position, such as on a frame or a transfer device, and ensuring that the outlet of the screening channel faces the target position; detecting the sealing of other parts of the screening device except the position of the screen 5, the integrity of the screen 5 and the stability of the installation of the screen 5; starting the device, feeding the slurry into the screening chamber, and ensuring that the slurry first contacts the position of a side wall of the tank body 1 when feeding the slurry into the screening chamber, so that the slurry in the tank body 1 forms a vortex; regularly observing the working state of the device during the operation of the device, observing the screening situation and whether there is leakage between the support plate 4 and the tank body 1, observing the screening efficiency, and when the screening is slow, timely processing is required to avoid blockage, and when leakage occurs, the screening needs to be stopped, otherwise the meaning of screening will be lost; after the screening is completed, the feeding is stopped, the inside of the tank body 1 and the screen 5 are cleaned, the debris accumulated on the screen 5 is removed, and the screen 5 is checked for damage. If there is damage, it needs to be replaced in time for the equipment to be used again.

[0044] In the present application, the upper pipe mouth of the feed pipe 3 uses a standard part docking interface to dock with various types of pipes, and the lower pipe mouth faces the side of the tank body 1. When feeding, the slurry located above the screen 5 in the screening chamber forms a rotating vortex, which drives the sediment / large particles / foreign matter to move and avoid blocking the screen 5. Further, the center of the support plate 4 can be set concave, such as setting the part of the support plate 4 corresponding to the screening channel into a curved surface structure, and the shape of the screen 5 is consistent with the shape of the support plate 4. Since the slurry that forms the vortex has a lower fluidity in the center position and the peripheral slurry flows faster, the central concave can be used to accommodate sediments and ensure the capacity to accommodate sediments, reduce the sediments in the outer circle of the screen 5 and ensure the screening efficiency of the outer circle. The entire screening process is carried out in the screening chamber formed by the tank body 1, which prevents the slurry from scattering and spreading. At the same time, the pressure in the screening chamber will rise after the slurry is fed, thereby increasing the rate at which the slurry passes through the screen 5. The slurry formed with the vortex fully ensures the efficient screening of the slurry.

[0045] The existing screen 5 and the steel ring of the outer ring as the mounting structure are an integrated structure, and the screen 5 cannot be replaced separately when it is damaged. The present application adopts a support plate 4 structure to fix the screen 5, which is convenient for replacement when the screen 5 is damaged. The fixing member 6 is located outside the screen 5 and will not destroy the integrity of the screen 5. The step portion 7 and the convex strip 8 structure are provided to ensure the fixing and biting ability of the screen 5.

[0046] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. An ITO slurry high-efficiency screening device, characterized in that: include: A tank body (1), wherein a sieving chamber is provided in the tank body (1), and a sieving channel communicating with the sieving chamber is provided at the bottom end of the tank body (1); A feed pipe (3), the feed pipe (3) passes through the tank body (1), and the connection position is sealed, and the outlet end of the feed pipe (3) is located in the screening chamber and faces the side wall of the tank body (1); A support plate (4), the support plate (4) being a hollow structure and being fixedly connected to the tank body (1) via a fixing member (6); A screen (5), the screen (5) is located between the support plate (4) and the tank body (1) and covers the screening channel.

2. The ITO slurry efficient screening device according to claim 1, characterized in that: A vibrator (2) is fixedly connected to the tank body (1).

3. The ITO slurry efficient screening device according to claim 1, characterized in that: The tank body (1) comprises a cover body and a surrounding edge which are detachably connected and mounted, and the feed pipe (3) passes through the cover body.

4. The ITO slurry efficient screening device according to claim 3, characterized in that: A sealing ring is arranged at the position where the cover body is connected to the surrounding edge.

5. The ITO slurry efficient screening device according to claim 4, characterized in that: The surrounding edge includes a side wall and a bottom wall of an integral structure, the screening channel is opened on the bottom wall, and the size of the screening channel is smaller than the size of the screening chamber.

6. The ITO slurry efficient screening device according to claim 5, characterized in that: A step portion (7) is provided on a side of the bottom wall close to the screen (5), and an edge of the screen (5) is located outside the step portion (7).

7. The ITO slurry efficient screening device according to claim 6, characterized in that: A convex strip (8) is provided on one side of the support plate (4) close to the screen (5), and the edge of the screen (5) is located outside the convex strip (8).

8. The ITO slurry efficient screening device according to claim 1, characterized in that: The connection position of the fixing member (6) is located outside the screen (5).

9. The ITO slurry efficient screening device according to claim 9, characterized in that: The fixing member (6) is a bolt structure or a clamp structure.

10. A slurry screening method, characterized in that: The steps include: Assembling the screening device according to any one of claims 1 to 9 at a designated position; Checking the sealing of the parts of the screening device except the position of the screen (5), the integrity of the screen (5) and the stability of the installation of the screen (5); Starting the device, feeding slurry into the screening chamber, and ensuring that the slurry first contacts a side wall of the tank body (1) when entering the screening chamber, so that the slurry in the tank body (1) forms a vortex; During the operation of the equipment, the working status of the equipment is regularly observed to observe the screening condition and whether there is leakage between the support plate (4) and the tank body (1); After the screening is completed, the feeding is stopped, the inside of the tank body (1) and the screen (5) are cleaned, the debris accumulated on the screen (5) is removed, and the screen (5) is checked for damage.

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