Double-layer screening device for slurry

Abstract

The utility model discloses a double -deck screening device for slurry, from top to bottom includes first slurry bin, second slurry bin and third slurry bin in proper order, second slurry bin and first slurry bin and third slurry bin are all intercommunication, the side of third slurry bin is provided with first discharge pipe, the bottom of third slurry bin is obliquely arranged towards the direction of first discharge pipe, and the bottom of first slurry bin and the top of second slurry bin and the bottom of second slurry bin and the top of third slurry bin are all provided with screen cloth support subassembly, the inside of the top of first slurry bin is provided with stirring subassembly and liquid level controller. The utility model discloses a double -deck screening device for slurry can be used to need screening two passes material, can effectively reduce the land occupation of equipment and improve screening efficiency, the setting of stirring subassembly can stir the slurry, and the screening of relatively viscous slurry is convenient, in addition, liquid level controller can monitor the feed quantity of slurry, avoids the slurry to be in danger of material.

Description

Technical Field

[0001] This utility model belongs to the technical field of screening devices, specifically relating to a double-layer screening device for slurry. Background Technology

[0002] When preparing polishing slurry, there may be a small number of large particles, and impurities may be introduced during the preparation process. Large particles and impurities have an adverse effect on the polishing effect of the polishing slurry, and may cause scratches on the surface of the polishing material during subsequent polishing. Therefore, it is usually necessary to sieve the slurry prepared from the polishing slurry to remove any impurities or large particles that may be present, so that the slurry is more uniform.

[0003] Vibrating screens are typically used to screen slurries. In continuous production, the slurry continuously enters the screen. After prolonged operation, the screen may become clogged, or a large amount of material that is difficult to screen may remain, causing the discharge rate to be lower than the feed rate, thus posing a risk of spillage. Furthermore, when the slurry is highly concentrated and viscous, the screening difficulty increases. In addition, most existing vibrating screens are single-layered, allowing only one pass at a time, which limits their effectiveness for slurries requiring multiple passes and results in low screening efficiency. Utility Model Content

[0004] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides an improved double-layer slurry screening device, which can prevent slurry overflow and improve slurry screening efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-layer slurry screening device includes, from top to bottom, a first slurry bin, a second slurry bin, and a third slurry bin. The second slurry bin is connected to both the first and third slurry bins. A first discharge pipe is provided on one side of the third slurry bin, and the bottom of the third slurry bin is inclined towards the direction of the first discharge pipe. Screen support assemblies are provided between the bottom of the first slurry bin and the top of the second slurry bin, and between the bottom of the second slurry bin and the top of the third slurry bin. A stirring assembly and a liquid level controller are provided inside the top of the first slurry bin.

[0007] According to a preferred embodiment of the present invention, the third slurry silo includes a slurry silo body and a base that are fixedly connected. The slurry silo body extends from its top to its bottom, and the top surface of the base is inclined downward on the side near the first discharge pipe.

[0008] According to a preferred embodiment of the present invention, the acute angle formed between the top surface and the bottom surface of the base is 5° to 30°. The inclined arrangement of the base of the third slurry bin facilitates the flow of the sieved slurry from the third slurry bin to the first discharge pipe.

[0009] According to a preferred embodiment of the present invention, one end of the first discharge pipe is fixedly connected to one side of the slurry silo body, and the top surface of the base near the end of the first discharge pipe is flush with the bottom surface of the end of the first discharge pipe near the third slurry silo.

[0010] According to a preferred embodiment of the present invention, each of the screen support assemblies includes a screen and a support plate located below the screen. The support plate has a receiving cavity formed from its top surface downwards, and the depth of the receiving cavity is less than the thickness of the support plate.

[0011] According to a preferred embodiment of the present invention, the bottom of the support plate is provided with a plurality of through holes penetrating its bottom thickness, a plurality of first spacers are spaced apart along a first direction in the receiving cavity, and a plurality of second spacers are spaced apart along a second direction in the receiving cavity, the first direction being perpendicular to the second direction; the bottoms of the first and second spacers are both in contact with the top surface of the through holes, and the tops of the first and second spacers are both flush with the top surface of the receiving cavity.

[0012] According to a preferred embodiment of the present invention, each of the first partitions intersects with all the second partitions. The multiple first partitions and multiple second partitions together divide the receiving cavity into multiple receiving sections. Each receiving section contains multiple vibrating screen balls, the diameter of which is larger than the diameter of the through-hole, and the diameter of the vibrating screen balls is 1-5 cm. When a large amount of slurry is being screened, it will exert significant pressure on the screen. Therefore, by providing a support plate, first partitions, second partitions, and vibrating screen balls under the screen, the slurry screening speed can be accelerated, thereby improving the slurry screening efficiency.

[0013] According to a preferred embodiment of the present invention, the first slurry bin includes a first bin body and a second bin body that are connected to each other. The first bin body is located above the second bin body, and the bottom of the second bin body has an opening. The second slurry bin extends from its top to its bottom. A first pipe and a second pipe are fixedly installed on the top of the first bin body, perpendicular to the screen support assembly. The bottom of the first pipe is flush with the bottom of the second pipe. The distance from the bottom of the first pipe to the bottom surface of the first bin body is 25% to 75% of the height of the first bin body. The first pipe is used as a channel for slurry to enter the first slurry bin.

[0014] According to a preferred embodiment of this utility model, a liquid level controller is inserted into the second pipe, and the bottom of the liquid level controller is located at the junction of the first and second slurry chambers. If the slurry flows in too quickly, or if the screen is clogged, there is a risk of overflow. Adding a liquid level controller to the first slurry chamber effectively controls the slurry feed rate. When the slurry level in the first slurry chamber is level with the bottom of the liquid level controller, the slurry feed can be stopped in time to prevent overflow.

[0015] According to a preferred embodiment of the present invention, the stirring assembly includes a first motor and a stirring brush connected to the first motor. The first motor drives the stirring brush to rotate. The stirring brush is located in a first slurry bin, and the distance between the stirring brush and the screen at the bottom of the first slurry bin is 1-3 cm. When the slurry viscosity is high, it is not easy to pass through the sieve, and continuous stirring is required to speed up the sieving process. Therefore, a stirring assembly is provided to improve the slurry sieving speed. In some embodiments of the present invention, the stirring brush includes a fixed shaft and multiple brush blades fixedly connected to the bottom of the fixed shaft. The top of the fixed shaft is fixedly connected to the rotating shaft of the first motor, and the fixed shaft is located at the center of the first slurry bin. The multiple brush blades are evenly spaced, and the length direction of the brush blades is perpendicular to the height direction of the first slurry bin. The ratio of the length of each brush blade to the radius of the screen is 3-4:5, ensuring that the stirring brush can effectively stir the slurry.

[0016] Compared with the prior art, the double-layer slurry screening device of this utility model, by setting up a first slurry bin, a second slurry bin, and a third slurry bin, and setting a screen support assembly between two adjacent slurry bins, and further setting up a stirring assembly and a liquid level controller inside the top of the first slurry bin, realizes double-layer slurry screening. It can be used for materials that need to be screened twice, effectively reducing the equipment's footprint and improving screening efficiency. The stirring assembly can stir the slurry, which is convenient for screening more viscous slurries. In addition, the liquid level controller can monitor the slurry feed rate and prevent slurry overflow. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of the double-layer slurry screening device in a preferred embodiment of the present invention;

[0019] Figure 2This is a three-dimensional structural diagram of the base of the third slurry bin in a preferred embodiment of the present invention;

[0020] Figure 3 This is a top view of the screen support assembly in a preferred embodiment of the present invention, omitting the screen.

[0021] Figure 4 This is a three-dimensional structural diagram of the stirring brush of the stirring assembly in a preferred embodiment of the present invention;

[0022] The attached figures are labeled as follows:

[0023] First slurry bin-1, First bin body-1a, Second bin body-1b, Second slurry bin-2, Third slurry bin-3, Slurry bin body-31, Base-32, Fixed seat-4, Support plate-51, Through hole-511, First partition bar-52, Second partition bar-53, Vibrating screen ball-54, First motor-61, Fixed shaft-62, Brush blade-63, Liquid level controller-7, First pipe-8, Second pipe-9, First discharge pipe-10, Transfer tank-11, Second motor-12, Second discharge pipe-13. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0025] See Figures 1 to 4 The slurry double-layer screening device of this embodiment includes, from top to bottom, a first slurry bin 1, a second slurry bin 2, a third slurry bin 3 and a fixed base 4. The second slurry bin 2 is connected to both the first slurry bin 1 and the third slurry bin 3. Screen support components are provided between the bottom of the first slurry bin 1 and the top of the second slurry bin 2, and between the bottom of the second slurry bin 2 and the top of the third slurry bin 3. A stirring component and a liquid level controller 7 are also provided inside the top of the first slurry bin 1.

[0026] Furthermore, such as Figure 1As shown, the first slurry bin 1 includes a first bin body 1a and a second bin body 1b that are connected to each other. The first bin body 1a is located above the second bin body 1b. In this embodiment, the first bin body 1a is shaped like a frustum and is hollow inside. The bottom of the second bin body 1b has an opening. A first pipe 8 and a second pipe 9, perpendicular to the screen support assembly, are fixedly installed on both sides of the top of the first bin body 1a. The bottom of the first pipe 8 is flush with the bottom of the second pipe 9. The first pipe 8 serves as a channel for slurry to enter the first slurry bin 1. A level controller 7 is inserted into the second pipe 9, and the bottom of the level controller 7 is located at the junction of the first bin body 1a and the second bin body 1b. The level controller 7 controls the slurry feed rate. When the slurry level in the first slurry bin 1 is flush with the bottom of the level controller 7, the feed can be stopped in time to prevent overflow. In addition, the distance from the bottom of the first pipe 8 to the bottom surface of the first slurry body 1a is set to be 25% to 75% of the height of the first slurry body 1a. This distance is used to provide a buffer for the slurry to enter the first slurry slurry slurry 1 from the first pipe 8.

[0027] The mixing assembly includes a first motor 61 and a mixing brush connected to the first motor 61. The first motor 61 drives the mixing brush to rotate, thereby mixing the slurry in the first slurry bin 1. Specifically, as shown... Figure 4 As shown, the stirring brush includes a fixed shaft 62 and multiple brush blades 63 fixedly connected to the bottom of the fixed shaft 62. The top of the fixed shaft 62 is fixedly connected to the rotating shaft of the first motor 61, and the fixed shaft 62 is located at the center of the first slurry bin 1. The multiple brush blades 63 are evenly spaced, and the length direction of the brush blades 63 is perpendicular to the height direction of the first slurry bin 1. The ratio of the length of each brush blade 63 to the radius of the screen is 3 to 4:5. At the same time, the distance from the stirring brush to the screen support assembly at the bottom of the first slurry bin 1 is set to 1 to 3 cm to ensure that the slurry can be screened, accelerate the slurry screening speed, and avoid clogging when the slurry viscosity is high. In this embodiment, the ratio of the length of each brush blade 63 to the radius of the screen is preferably 4:5.

[0028] Furthermore, the second slurry bin 2 extends from its top to its bottom; the third slurry bin 3 includes a slurry bin body 31 and a base 32 fixedly connected, with the slurry bin body 31 extending from its top to its bottom. A first discharge pipe 10 is provided on one side of the slurry bin body 31, and the slurry bin body 31 communicates with the first discharge pipe 10. The top surface of the base 32 is inclined downwards on the side near the first discharge pipe 10. Figure 2As shown, the acute angle formed between the top surface and the bottom surface of the base 32 is 5° to 30°; the top surface of the base 32 near the first discharge pipe 10 is flush with the bottom surface of the first discharge pipe 10 near the third slurry bin 3. The setting of the third slurry bin 3 in this embodiment can facilitate the smooth flow of the slurry after screening from the third slurry bin 3 to the first discharge pipe 10, thereby speeding up the discharge speed.

[0029] like Figure 1 As shown, the double-layer slurry screening device also includes a transfer tank 11, which is located at the end of the first discharge pipe 10 away from the third slurry bin 3. The transfer tank 11 is designed to facilitate timely collection of slurry for testing and transportation during the screening process. A second motor 12 is installed at the top of the transfer tank 11, and an agitator (not shown) is installed inside the transfer tank 11. The second motor 12 drives the agitator to rotate, thereby stirring the slurry after screening in the transfer tank 11 and preventing sedimentation. In addition, a second discharge pipe 13 is fixedly installed at the bottom of the transfer tank 11 to transport the slurry after screening to the final storage device.

[0030] Furthermore, each screen support assembly includes a screen (not shown) and a support plate 51 located below the screen. In this embodiment, two sets of screen support assemblies are provided, with a total of two sets of screens, i.e., double-layer sieving, which can be used to sieve the slurry twice.

[0031] like Figure 3 As shown, a receiving cavity is formed from the top surface of the support plate 51 downwards. The depth of the receiving cavity is less than the thickness of the support plate 51. Multiple through holes 511 penetrating the bottom thickness of the support plate 51 are formed at the bottom to ensure that the slurry after screening can continue to flow downwards. Multiple first spacers 52 are spaced apart along a first direction in the receiving cavity, and multiple second spacers 53 are spaced apart along a second direction in the receiving cavity. The bottoms of both the first and second spacers 52 are in contact with the top surface of the through holes 511, and the tops of both the first and second spacers 53 are flush with the top surface of the receiving cavity. Each first spacer 52 intersects all the second spacers 53. The first direction is perpendicular to the second direction. The multiple first spacers 52 and multiple second spacers 53 work together to divide the receiving cavity into multiple receiving sections, into which multiple vibrating screen balls 54 are placed. The diameter of the vibrating screen balls 54 is larger than the diameter of the through holes 511, and the diameter of the vibrating screen balls 54 is 1-5 cm. The vibrating screen ball 54 can accelerate the slurry screening speed when there is a large amount of slurry to be screened, thereby improving the slurry screening efficiency and preventing the slurry from clogging the screen.

[0032] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-layer sieving device for slurry, characterized in that, From top to bottom, it includes a first slurry bin, a second slurry bin, and a third slurry bin. The second slurry bin is connected to both the first and third slurry bins. A first discharge pipe is provided on one side of the third slurry bin. The bottom of the third slurry bin is inclined towards the direction of the first discharge pipe. Screen support assemblies are provided between the bottom of the first slurry bin and the top of the second slurry bin, and between the bottom of the second slurry bin and the top of the third slurry bin. The top of the first slurry tank is equipped with a stirring assembly and a liquid level controller.

2. The double-layer sieving device for slurry according to claim 1, characterized in that, The third slurry silo includes a slurry silo body and a base that are fixedly connected. The slurry silo body extends from its top to its bottom, and the top surface of the base is inclined downwards on the side near the first discharge pipe.

3. The double-layer sieving device for slurry according to claim 2, characterized in that, The acute angle formed between the top surface and the bottom surface of the base is 5° to 30°.

4. The double-layer sieving device for slurry according to claim 2, characterized in that, One end of the first discharge pipe is fixedly connected to one side of the slurry silo body, and the top surface of the base near the first discharge pipe is flush with the bottom surface of the first discharge pipe near the third slurry silo.

5. The double-layer sieving device for slurry according to claim 1, characterized in that, Each of the screen support assemblies includes a screen and a support plate located below the screen. The support plate has a receiving cavity with its top surface facing downwards, and the depth of the receiving cavity is less than the thickness of the support plate.

6. The double-layer sieving device for slurry according to claim 5, characterized in that, The support plate has multiple through holes extending through its bottom thickness. The receiving cavity has multiple first spacers spaced apart along a first direction and multiple second spacers spaced apart along a second direction. The first direction is perpendicular to the second direction. The bottoms of the first and second spacers are both in contact with the top surface of the through holes, and the tops of the first and second spacers are both flush with the top surface of the receiving cavity.

7. The double-layer sieving device for slurry according to claim 6, characterized in that, Each of the first partitions intersects with all the second partitions. The multiple first partitions and multiple second partitions are used together to divide the receiving cavity into multiple receiving sections. Each receiving section contains multiple vibrating screen balls. The diameter of the vibrating screen balls is larger than the diameter of the through hole. The diameter of the vibrating screen balls is 1 to 5 cm.

8. The double-layer sieving device for slurry according to claim 1, characterized in that, The first slurry bin includes a first bin body and a second bin body that are connected to each other. The first bin body is located above the second bin body. The bottom of the second bin body has an opening. The second slurry bin extends from its top to its bottom. A first pipe and a second pipe are fixedly installed on the top of the first bin body, perpendicular to the screen support assembly. The bottom of the first pipe is flush with the bottom of the second pipe. The distance from the bottom of the first pipe to the bottom surface of the first bin body is 25% to 75% of the height of the first bin body. The first pipe is used as a channel for slurry to enter the first slurry bin.

9. The double-layer sieving device for slurry according to claim 8, characterized in that, A liquid level controller is inserted into the second pipe, and the bottom of the liquid level controller is located at the junction of the first compartment and the second compartment.

10. The double-layer sieving device for slurry according to claim 5, characterized in that, The stirring assembly includes a first motor and a stirring brush connected to the first motor. The first motor is used to drive the stirring brush to rotate. The stirring brush is located in a first slurry bin, and the distance between the stirring brush and the screen at the bottom of the first slurry bin is 1 to 3 cm.

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