High-purity quartz sand pickling feeding and intelligent screening device

Abstract

The utility model relates to the technical field of semiconductor production especially, and it is a kind of high-purity quartz sand pickling feeding intelligent screening device, solve the existing technology in the semiconductor production's shortcomings, including screening cavity, buffer cavity and discharge mechanism;The inside of screening cavity is provided with several screening nets, and there is height difference between several screening nets;The butt joint of buffer cavity and screening cavity is provided with uniform material mechanism, and the uniform material mechanism evenly deposits material in buffer cavity on the first layer screening net in screening cavity;The discharge mechanism is set according to the number of screening net, and the discharge mechanism includes scraper, the side of screening cavity is provided with several openable discharge ports, and the scraper scrapes the material screened on each layer screening net out of discharge port, the buffer cavity is provided with stirring mechanism, and the bottom of buffer cavity is set as inverted conical surface, the utility model, quickly realize the function of high-purity quartz sand flotation wet material dehydration and coarse particle screening.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor manufacturing technology, specifically to an intelligent screening device for feeding high-purity quartz sand after acid washing. Background Technology

[0002] High-purity quartz sand is an important industrial raw material, widely used in high-tech fields such as semiconductors, photovoltaics, and optical communications. In the production process of high-purity quartz sand, the flotation process is crucial, as it directly affects the purity and quality of the quartz sand.

[0003] A double-layer vibrating screening device for quartz sand preparation is disclosed in the existing patent publication number CN119634238A. The device consists of a primary feeding screening mechanism, a first-layer screening device, and a second-layer screening device. The primary feeding screening mechanism, the first-layer screening device, and the second-layer screening device are arranged sequentially from right to left and from high to low. A horizontal shaft is welded between the left front and rear ends of the material conveying slide and the first support leg. A fixed shaft plate is connected between the right front and rear ends of the material conveying slide and the bottom front and rear ends of the feeding channel. The first screen plate is located at the upper end of the first support frame.

[0004] In the above technical solution, quartz sand is screened by vibration and gradually layered feeding. However, the screening devices are set up from right to left and from high to low, resulting in an excessively large overall equipment area. The more screening devices there are, the larger the equipment area becomes, making it difficult to select flexibly. Furthermore, feeding materials into fixed positions can lead to local accumulation of materials, resulting in low utilization of the screening devices and low screening efficiency.

[0005] Therefore, it is necessary to design an intelligent screening device for feeding high-purity quartz sand after acid washing in order to solve the problems mentioned in the background technology. Utility Model Content

[0006] The purpose of this invention is to provide an intelligent screening device for feeding high-purity quartz sand after acid washing, which can quickly realize the functions of dewatering wet material and screening coarse particles after high-purity quartz sand flotation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an intelligent screening device for feeding high-purity quartz sand acid washing, comprising a screening chamber, a buffer chamber, and a discharge mechanism; The screening chamber is equipped with several screening screens, and there is a height difference between the screening screens; A material leveling mechanism is provided at the junction of the buffer chamber and the screening chamber. The material leveling mechanism evenly distributes the material in the buffer chamber onto the first layer of screening mesh in the screening chamber. The discharge mechanism is set according to the number of screening screens. The discharge mechanism includes a scraper. The side of the screening chamber is provided with several openable discharge ports. The scraper scrapes the material screened on each layer of screening screen out of the discharge ports.

[0008] According to the above technical solution, a stirring mechanism is provided inside the buffer cavity, the bottom of the buffer cavity is set as an inverted conical surface, the stirring mechanism includes a stirring frame, the stirring frame is driven to rotate by a driving rod, and the top end of the driving rod is rotatably connected to the buffer cavity.

[0009] According to the above technical solution, the material leveling mechanism includes a rotatable material gathering hopper, the inner side of the material gathering hopper is adapted to an inverted conical surface, one end of the material gathering hopper is provided with a discharge port, and a guide slide is fixedly connected to the bottom of the material gathering hopper. The guide slide is inclined and the discharge port is located above the starting end of the guide slide.

[0010] According to the above technical solution, a retaining ring is fixedly connected to the outer periphery of the screening mesh. The retaining ring is set in the screening chamber. The upper end face of the retaining ring protrudes higher than the screening mesh. A flat opening is opened at one end of the retaining ring near the discharge port. A movable sealing block is set on the outside of the discharge port. The sealing block is adapted to the flat opening.

[0011] According to the above technical solution, the discharge mechanism further includes a central shaft, which passes through several screening screens and is rotatably connected to them. One end of the scraper is connected to the central shaft, and the scraping end of the scraper is provided with a guide arc surface, which pushes and guides the material towards the outer peripheral retaining ring.

[0012] According to the above technical solution, the upper end of the central shaft is connected to the guide vane.

[0013] According to the above technical solution, the outer side of the sealing block is slidably fitted with a guide frame, one end of the guide frame is open and fixed to the outside of the screening chamber, and the bottom of the guide frame near the discharge port is provided with a material dropping slope.

[0014] According to the above technical solution, a feed pipe is provided at one end of the buffer chamber, and a drain pipe is provided at the bottom of the screening chamber.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are: By setting multiple screening meshes in the same screening chamber, the size of the equipment is reduced, and it can be installed without a large site. The material is evenly fed into the first layer of the screening screen in advance by the material distribution mechanism, which avoids local accumulation and improves screening utilization and screening efficiency. By setting up scrapers, the material is further spread out and fully contacts the screening mesh. In addition, with the openable discharge port, the material on the screen can be actively scraped off, separating the material from the impurities and preventing excessive material or impurities from remaining in the screening mesh and causing blockage. This also facilitates subsequent screening operations and ensures the efficiency of subsequent screening. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the intelligent feeding and screening device of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a three-dimensional schematic diagram of the internal structure of the screening chamber of this utility model; Figure 4 yes Figure 2 A magnified view of a portion of region A; Figure 5 This is a schematic diagram of the sealing position of the sealing block of this utility model; In the diagram: 1. Screening chamber; 101. Drain pipe; 2. Buffer chamber; 201. Feed pipe; 3. Screening screen; 301. Snap ring; 302. Flat end; 4. Scraper; 5. Mixing frame; 501. Drive rod; 502. Gathering hopper; 503. Guide vane; 6. Sealing block; 601. Guide frame; 7. Central shaft; 8. Discharge port; 801. Drop slope. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5 The present invention provides a technical solution: a high-purity quartz sand pickling and feeding intelligent screening device, including a screening chamber 1, a buffer chamber 2 and a discharge mechanism; The screening chamber 1 is equipped with several screening screens 3, and there is a height difference between the screening screens 3; A material leveling mechanism is provided at the junction of the buffer chamber 2 and the screening chamber 1. The material leveling mechanism evenly distributes the material in the buffer chamber 2 onto the first layer of screening screen 3 in the screening chamber 1. The discharge mechanism is set according to the number of screening screens 3. The discharge mechanism includes a scraper 4. Several openable discharge ports 8 are opened on the side of the screening chamber 1. The scraper 4 scrapes the material screened on each layer of screening screen 3 out of the discharge port 8.

[0019] In this embodiment, when the material enters the buffer chamber 2, the material is evenly distributed onto the first layer of screening screen 3 by the material leveling mechanism. Multiple layers of screening screen 3 with varying heights are set up for graded screening, blocking coarse particles or impurities. At the same time, with the movement of the scraper 4, the material is further spread out to prevent accumulation and blockage, and to make full use of the entire screening screen 3 for screening. Until the last layer of screening screen 3 retains the required material, the excess water continues to fall, thus completing the screening and preliminary dehydration of the required material. Then the discharge port 8 is opened. At this time, the scraper 4 scrapes the impurities or materials on each layer of screening screen 3 out of the discharge port 8, and the next screening operation can be carried out. Furthermore, by setting the multi-layer screening mesh 3 within the same screening chamber 1, the size of the equipment is reduced, and it can be installed without a large site. Furthermore, the material is evenly fed into the first layer of screening screen 3 in advance by the material equalization mechanism to avoid local accumulation and improve screening utilization and screening efficiency. Furthermore, by setting up scraper 4, the material is spread out to fully contact the screening screen 3, and with the openable discharge port 8, the material on the screen can be actively scraped off, separating the material from the impurities and preventing excessive material or impurities from remaining in the screening screen 3 and causing blockage. This also facilitates subsequent screening operations and ensures the efficiency of subsequent screening.

[0020] A stirring mechanism is provided inside the buffer chamber 2. The bottom of the buffer chamber 2 is set as an inverted conical surface. The stirring mechanism includes a stirring frame 5. The stirring frame 5 is driven to rotate by a driving rod 501. The top end of the driving rod 501 is rotatably connected to the buffer chamber 2.

[0021] In this embodiment, when the material enters the buffer chamber 2, an inverted cone-shaped buffer chamber 2 is provided to guide the material to descend. At the same time, a stirring rack 5 is set to rotate under the drive rod 501 to stir the internal material, preventing blockage and avoiding material clumping. Furthermore, by setting up a stirring mechanism to rotate and disperse the material, combined with an inverted conical bottom surface, the material is ensured to smoothly enter the screening chamber 1; Preferably, the buffer chamber 2 is configured as a cylinder and an inverted cone. The upper cylindrical section is used to store materials, and the lower inverted cone has a cone angle of 60-90 degrees to facilitate material accumulation and falling. Furthermore, the inner wall of the chamber is polished to further reduce material adhesion.

[0022] The material equalization mechanism includes a rotatable material gathering hopper 502, the inner side of which is adapted to an inverted conical surface, a material discharge port at one end of the material gathering hopper 502, and a guide slide 503 fixedly connected to the bottom of the material gathering hopper 502. The guide slide 503 is inclined and the material discharge port is located above the starting end of the guide slide 503.

[0023] In this embodiment, by rotating the material hopper 502, the material continuously falls from the discharge port into the inclined guide vane 503. The guide vane 503 guides the material to flow obliquely and, in conjunction with the rotational motion, evenly distributes the material in a ring onto the first layer of screening screen 3. Furthermore, by adapting the material hopper 502 to the inverted conical surface of the buffer chamber 2, the material is first gathered when it rotates, and then discharged through the discharge port. With the help of the inclined guide vane 503, the material is initially and evenly fed, avoiding accumulation caused by local feeding. Preferably, the material of the material hopper 502 is stainless steel, and the whole is funnel-shaped with a material outlet on one side. The rotation radius is the same as the bottom inner diameter of the buffer chamber 2 to ensure that the material can be completely gathered into the material hopper 502. Preferably, the guide vane 503 is made of wear-resistant stainless steel and coated with a polytetrafluoroethylene anti-stick coating to further reduce wet material adhesion. The top end is welded and fixed to the bottom of the hopper 502.

[0024] A retaining ring 301 is fixedly connected to the outer periphery of the screening mesh 3. The retaining ring 301 is set in the screening chamber 1. The upper end of the retaining ring 301 protrudes higher than the screening mesh 3. A flat opening 302 is opened at one end of the retaining ring 301 near the discharge port 8. A movable sealing block 6 is set on the outside of the discharge port 8. The sealing block 6 is adapted to the flat opening 302.

[0025] In this embodiment, the material is evenly spread on the screening screen 3, and the retaining ring 301 is set to block the material. At this time, the sealing block 6 blocks the flat opening 302 and the discharge port 8, so that the material is confined within the retaining ring 301. When discharge is required, the sealing block 6 moves to open the flat opening 302 and the discharge port 8, and the scraper 4 can scrape the material on the screen along the flat opening 302 into the discharge port 8 for discharge. When discharge is not required, the sealing block 6 closes and seals again, and the screening operation can continue. Furthermore, the retaining ring 301 is set to protrude higher than the screening mesh 3 to contain and restrict the material, preventing the material from leaking from the edge during the screening process; Furthermore, a movable sealing block 6 is provided, which can be adjusted accordingly to cooperate with material screening or discharge, making it highly practical; Preferably, the filling block 6 adopts a composite structure of metal skeleton and silicone sealing layer, which has good sealing performance and its shape is compatible with the flat opening 302 and the discharge port 8 to ensure no gap after embedding. Preferably, a pneumatic cylinder is used to drive the sealing block 6 to improve the response speed. A magnetic switch is used to detect the position to ensure that the opening and closing are in place. In addition, the cylinder is equipped with a buffer device to further prevent the sealing block 6 from colliding with the flat end 302 and extend its service life.

[0026] The discharge mechanism also includes a central shaft 7, which passes through several screening screens 3 and is rotatably connected to them. One end of the scraper 4 is connected to the central shaft 7, and the scraping end of the scraper 4 is provided with a guide arc surface, which pushes and guides the material towards the outer peripheral retaining ring 301.

[0027] In this embodiment, the multi-layer scraper 4 is driven to rotate synchronously by the central shaft 7. Under the action of rotation, the material gradually moves outward along the guide arc surface. That is, the scraper 4 guides the material on the screen to the direction of the retaining ring 301. At this time, the sealing block 6 opens the flat opening 302 and the material is discharged along the discharge port 8. Furthermore, the central shaft 7 drives the multi-layer scraper 4 to rotate synchronously, eliminating the need for separate drive mechanisms. This simplifies the structure while enabling synchronous scraping and discharge of material from each layer of the screening screen 3, thus improving overall efficiency. Furthermore, the guide arc surface of the scraper 4 is set to slowly spread the material on the screening screen 3 and finally guide the material to the flat opening 302 and the discharge port 8, so as to avoid the material from accumulating on the screening screen 3, assist the screening screen 3 to screen quickly, and finally achieve the emptying of the material, which is highly practical. Furthermore, an online laser particle size analyzer can be installed in the screening chamber 1 to monitor the particle size of the material on the screening screen 3 and feed the data back to the control center. If the particle size analyzer shows that the material product is too coarse, the control center controls the central shaft 7 to rotate in the opposite direction and uses the other end of the scraper 4 to spread the material. This end face is designed with a concave structure to frame the material and rotate and push it to continuously spread it, extending the material screening time and thus further improving the screening efficiency. Preferably, the central shaft 7 is made of stainless steel, and its bottom is rotatably connected to the lower end plate of the screening chamber 1 through a bearing. The bearing has a sealing cover to further prevent material leakage, and the bottom extends out of the screening chamber 1 and is connected to the variable frequency reduction motor through a coupling to transmit rotational power. Preferably, each layer of screening mesh 3 is provided with at least one scraper 4. In this embodiment, two scrapers 4 are provided and symmetrically distributed along the central axis 7. The material is a metal skeleton, which is matched with a silicone scraping end to ensure structural strength and avoid damage to the surface of screening mesh 3.

[0028] The upper end of the central shaft 7 is connected to the guide slide 503.

[0029] In this embodiment, the central shaft 7 synchronously drives the guide vane 503 to rotate, so that the material is evenly fed into the screening screen 3, while the multi-layer scraper 4 rotates. After the material is evenly distributed, the spreading, screening, scraping and discharging are carried out in a synchronous linkage. Furthermore, by connecting the guide vane 503 and the multi-layer scraper 4 simultaneously through a single drive center shaft 7, one drive source can achieve uniform material distribution and multi-layer synchronous scraping, eliminating the need for a separate drive mechanism for the guide vane 503, and avoiding the installation of additional components in the narrow screening chamber 1, thus reducing the number of parts and making it highly practical. Furthermore, by having the guide vane 503 and the scraper 4 rotate synchronously, the feeding speed and the scraping speed are matched to each other, avoiding material accumulation or idling caused by the mismatch between the two speeds, thus improving the continuity and efficiency of screening.

[0030] Preferably, the bottom of the guide slide 503 is welded to the top of the central shaft 7, and a reinforcing rib is provided at the connection to further improve the connection strength and prevent deformation during rotation.

[0031] The outer side of the sealing block 6 is slidably fitted with a guide frame 601. One end of the guide frame 601 is open and fixed to the outside of the screening chamber 1. The bottom of the guide frame 601 is provided with a discharge slope 801 near the discharge port 8.

[0032] In this embodiment, the sealing block 6 slides along the guide frame 601, opens the flat opening 302, and the material falls into the discharge slope 801 through the discharge port 8, so that the material quickly slides down to the subsequent equipment; Preferably, the material discharge ramp 801 is fixed with bolts, which facilitates disassembly and allows for individual replacement after wear, reducing maintenance costs; Preferably, a micro vibration motor is installed at the bottom of the material dropping slope 801 to accelerate the material dropping speed and prevent material adhesion and accumulation.

[0033] A feed pipe 201 is provided at one end of the buffer chamber 2, and a drain pipe 101 is provided at the bottom of the screening chamber 1.

[0034] In this embodiment, the preceding slurry enters the buffer chamber 2 through the feed pipe 201, and after being processed by the stirring mechanism and the uniform material mechanism, it is screened by the multi-layer screening screen 3. The water separated by screening is finally collected at the bottom of the screening chamber 1 and discharged through the drain pipe 101. Furthermore, a drain pipe 101 is installed to collect the water separated during the screening process, preventing water from mixing with the graded materials and ensuring dewatering efficiency.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A smart screening device for feeding high-purity quartz sand after acid washing, characterized in that, It includes a screening chamber (1), a buffer chamber (2), and a discharge mechanism; The screening chamber (1) is provided with a plurality of screening screens (3), and there is a height difference between the plurality of screening screens (3); A material leveling mechanism is provided at the junction of the buffer chamber (2) and the screening chamber (1). The material leveling mechanism evenly distributes the material in the buffer chamber (2) onto the first layer of screening screen (3) in the screening chamber (1). The discharge mechanism is set according to the number of screening screens (3). The discharge mechanism includes a scraper (4). The side of the screening chamber (1) is provided with several openable discharge ports (8). The scraper (4) scrapes the material screened on each layer of screening screen (3) out of the discharge port (8).

2. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 1, characterized in that, The buffer cavity (2) is provided with a stirring mechanism. The bottom of the buffer cavity (2) is set as an inverted conical surface. The stirring mechanism includes a stirring frame (5). The stirring frame (5) is driven to rotate by a driving rod (501). The top end of the driving rod (501) is rotatably connected to the buffer cavity (2).

3. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 2, characterized in that, The material leveling mechanism includes a rotatable material gathering hopper (502), the inner side of which is adapted to an inverted conical surface, a material discharge port at one end of the material gathering hopper (502), and a guide slide (503) fixedly connected to the bottom of the material gathering hopper (502). The guide slide (503) is inclined, and the material discharge port is located above the starting end of the guide slide (503).

4. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 3, characterized in that, A retaining ring (301) is fixedly connected to the outer periphery of the screening mesh (3). The retaining ring (301) is set in the screening chamber (1). The upper end face of the retaining ring (301) protrudes higher than the screening mesh (3). A flat opening (302) is opened at one end of the retaining ring (301) near the discharge port (8). A movable sealing block (6) is provided on the outside of the discharge port (8). The sealing block (6) is adapted to the flat opening (302).

5. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 4, characterized in that, The discharge mechanism also includes a central shaft (7), which passes through several screening screens (3) and is rotatably connected to them. One end of the scraper (4) is connected to the central shaft (7), and the scraping end of the scraper (4) is provided with a guide arc surface, which pushes and guides the material towards the outer peripheral retaining ring (301).

6. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 5, characterized in that, The upper end of the central shaft (7) is connected to the guide slide (503).

7. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 4, characterized in that, The outer side of the filling block (6) is slidably fitted with a guide frame (601). One end of the guide frame (601) is open and fixed to the outside of the screening chamber (1). The bottom of the guide frame (601) is provided with a material dropping slope (801) near the discharge port (8).

8. The intelligent screening device for acid washing and feeding of high-purity quartz sand according to claim 1, characterized in that, The buffer chamber (2) has a feed pipe (201) at one end, and the screening chamber (1) has a drain pipe (101) at the bottom.

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