GB2568330A

GB2568330A - Mica sheet screening and cleaning device used in mica paper production process

Info

Publication number: GB2568330A
Application number: GB1805165.6A
Authority: GB
Inventors: Ouyang Yun
Original assignee: Pingjiang Vpi Mica Insulating Mat Co Ltd
Current assignee: Pingjiang Vpi Mica Insulating Mat Co Ltd
Priority date: 2016-08-31
Filing date: 2016-08-31
Publication date: 2019-05-15
Anticipated expiration: 2036-08-31
Also published as: WO2018040044A1; GB201805165D0; GB2568330B

Abstract

Disclosed is a mica sheet screening and cleaning device used for a mica paper production process, comprising a screening pond (1), wherein the screening pond (1) is separated into a cleaning zone (2) and an overflow groove (4) by an overflow baffle (3); a lower end of the cleaning zone (2) is provided with a screening plate (6), a bottom tier pipe (8), wherein a side wall of the bottom tier pipe (8) is provided with a bottom layer pipe water spray hole (81), and the bottom tier pipe (8) is connected to running water via a main water pipe (7) arranged outside the screening pond (1); and one side, opposite the overflow baffle (3), at an upper end of the cleaning zone (2) is provided with a flushing pipe (5), and a side wall of the flushing pipe (5) is provided with a flushing pipe water spray hole (51), and the flushing pipe (5) is connected to running water after penetrating through an outer wall of the screening pond (1). The mica sheet screening and cleaning device used in the mica paper production process thoroughly cleans and filters out earth impurities, etc., in the mica sheet by means of turbulent flotation, with almost zero damage to the diameter of the mica sheet, being convenient for cleaning while protecting the mica sheet, and being favorable for improving the quality grade of the mica paper products.

Description

(57) Disclosed is a mica sheet screening and cleaning device used for a mica paper production process, comprising a screening pond (1), wherein the screening pond (1) is separated into a cleaning zone (2) and an overflow groove (4) by an overflow baffle (3); a lower end of the cleaning zone (2) is provided with a screening plate (6), a bottom tier pipe (8), wherein a side wall of the bottom tier pipe (8) is provided with a bottom layer pipe water spray hole (81), and the bottom tier pipe (8) is connected to running water via a main water pipe (7) arranged outside the screening pond (1); and one side, opposite the overflow baffle (3), at an upper end of the cleaning zone (2) is provided with a flushing pipe (5), and a side wall of the flushing pipe (5) is provided with a flushing pipe water spray hole (51), and the flushing pipe (5) is connected to running water after penetrating through an outer wall of the screening pond (1). The mica sheet screening and cleaning device used in the mica paper production process thoroughly cleans and filters out earth impurities, etc., in the mica sheet by means of turbulent flotation, with almost zero damage to the diameter of the mica sheet, being convenient for cleaning while protecting the mica sheet, and being favorable for improving the quality grade of the mica paper products.

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DRAWINGS OF DESCRIPTION

FIG. 1

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FIG. 4

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FIG 5

FIG 6

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FIG. 8

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FIG. 9

DESCRIPTION

MICA SHEET SCREENING AND CLEANING DEVICE USED IN MICA PAPER PRODUCTION PROCESS

TECHNICAL FIELD [0001] The present invention belongs to the field of mica processing and production, and specifically relates to a mica sheet screening and washing device used in a production process of mica paper.

BACKGROUND [0002] Mica is a rock-forming mineral, is in a hexagonal plate crystal shape, is one of main rock-forming minerals and has the features of insulation and high-temperature resistance. Most of mica used in industry is sericite which is widely applied in the industries of coating, paint, electric insulation and the like.

[0003] In an industrial application, the features of the mica are commonly used for making paper for practical application. Mica paper is a high-quality insulation material and has the characteristics of no toxicity, no flavor, high-temperature resistance, high-voltage resistance, aging resistance, corrosion resistance and high insulating strength, and especially, the high-temperature resistance and the reprocessability of the mica paper cannot be replaced by other materials. A preparation method of the mica paper generally includes: mixing mica materials, pulping and papermaking by a chemical method or a mechanical method, and slitting and rewinding to form continuous roll paper. The mica paper not only keeps the features of natural mica sheets, but also has low production cost and small thickness tolerance, so the mica paper is a new generation product of the expensive natural mica sheets.

[0004] The existing making process of the mica paper includes: firstly smashing natural mica ores into mica sheets, then washing, calcining, pulping and papermaking.

[0005] At present, many manufacturers adopt the traditional manual operation for washing mica raw materials. Such an operation process is difficult to ensure the degree of cleanliness of the mica raw materials, the labor intensity of operators is larger, and foreign particles possibly exist in the raw materials and are difficult to remove. If a large number of foreign particles still exist in the washed mica raw materials, the hidden danger is caused to subsequent smashing and grading processes; the existence of the foreign particles causes a significant impact on the quality of a product, and the product consistent with service conditions cannot be obtained.

[0006] Meanwhile, since the size of the diameter of the mica sheet affects the degree of high-temperature resistance of the mica sheet, a natural mica sheet with a small diameter is possibly burned down at the temperature more than 800°C, while a natural mica sheet with a large diameter can endure the high temperature of about 900°C. It is found from the actual production that the mica paper product produced by mica sheets with a large diameter has high grade and good quality; and therefore, in the production process, the mica sheets shall be prevented from being smashed to the greatest extent, while the existing manual washing has greater damage to the diameter of the mica sheets, thereby being not conductive to protection of the mica sheets and not favorable for production of the mica paper.

SUMMARY OF THE PRESENT INVENTION [0007] In view of the above problems, the present invention aims to provide a mica sheet screening and washing device used in a production process of mica paper, wherein soil impurities and the like in mica sheets are thoroughly washed and filtered in a turbulence floatation manner, and the diameter of the mica sheets is almost not damaged, so that the mica sheets are protected while convenience and clearness are realized, thereby being conductive to improving the product grade of the mica paper.

[0008] In order to realize the above purpose, the present invention adopts the technical solution below: the mica sheet screening and washing device used in the production process of the mica paper comprises a screening pool (1), wherein the screening pool (1) is divided into a washing area (2) and an overflow groove (4) by an overflow baffle (3), and the top end of the overflow baffle (3) is lower than the peripheral height of the screening pool (1); a screening plate (6) is arranged at the lower end of the washing area (2), a bottom-layer pipe (8) is arranged under the screening plate (6), a plurality of bottom-layer pipe water spray holes (81) are formed in the side wall of the bottom-layer pipe (8), and the bottom-layer pipe (8) is connected to tap water by a main water pipe (7) arranged at the outer part of the screening pool (1); one side of the upper end of the washing area (2), which is opposite to the overflow baffle (3), is provided with a flushing pipe (5), a plurality of flushing pipe water spray holes (51) are arranged in rows at one side of the side wall of the flushing pipe (5), which is oriented towards the overflow baffle (3), and the flushing pipe (5) is connected to the tap water after penetrating through the outer wall of the screening pool (1); and a drainage pipe (42) is arranged under the overflow groove (4).

[0009] Further, the upper surface of the overflow baffle (3) is a bevel (31), and one side of the bevel (31), which is close to the overflow groove (4), is lower than one side close to the washing area (2).

[0010] Further, two rows of bottom-layer pipe water spray holes (81) are arranged in the side wall of the bottom-layer pipe (8) and are arranged symmetrically along the vertical direction, and projections of the bottom-layer pipe water spray holes (81) along the axial direction of the bottom-layer pipe (8) are separated by 45 degrees.

[0011] Further, a connecting line between the center of the flushing pipe water spray holes (51) on the flushing pipe (5) and the center of the cross section of the flushing pipe (5) is level with the top end of the overflow baffle (3).

[0012] Further, the connecting line between the center of the flushing pipe water spray holes (51) on the flushing pipe (5) and the center of the cross section of the flushing pipe (5) is intersected with a horizontal line of the maximum water level of the washing area (2), and the point of intersection is close to one side of the overflow groove (4).

[0013] Further, a plurality of screening holes (61) are arranged in the screening plate (6) in rows, and the upper surface of the screening plate (6) between two rows of screening holes (61) is horizontally provided with spacing bars (62).

[0014] Further, the height from the bottom-layer pipe (8) to the pool bottom of the screening pool (1) is 1/5-1/4 of the height of the overflow baffle (3).

[0015] Further, the screening plate (6) can be arranged on the inner wall of the screening pool (1) movably up and down and is kept horizontal.

[0016] Further, the bottom surface of the overflow groove (4) is a bevel, and the part of the bevel, which is close to one end of the drainage pipe (42), is lower.

[0017] Further, a detachable filtering screen (10) used for collecting small mica sheets is arranged on the side surface of the overflow groove (4) on the overflow baffle (3).

[0018] According to the mica sheet screening and washing device used in the production process of the mica paper, the soil impurities and the like in the mica sheets are thoroughly washed and filtered in a turbulence floatation manner, and the diameter of the mica sheets is almost not damaged, so that the mica sheets are protected while convenience and clearness are realized, thereby being conductive to improving the quality grades of the mica paper product.

[0019] 1. Multiple water flows are adopted to form turbulence to realize 360-degree flushing in a floatation state of the mica sheets, and the impurities attached to the surfaces of the mica sheets are thoroughly scoured off.

[0020] 2. Since the water flow action is only adopted, no external force is directly exerted on the mica sheets, the damage to the mica sheets is minimal, and the diameter of the mica sheets is almost not damaged.

[0021] 3. A structure of the screening plate that can move up and down is adopted to more conveniently transfer the washed mica sheets to the next process.

BRIEF DESCRIPTION OF DRAWINGS [0022] Fig. 1 is a three-dimensional structural schematic diagram of the present invention.

[0023] Fig. 2 is an overlooking structural schematic diagram of the present invention.

[0024] Fig. 3 is a B-B sectional schematic diagram in Fig. 2.

[0025] Fig. 4 is a schematic diagram of a working state of a flushing pipe in Fig. 3.

[0026] Fig. 5 is a schematic diagram of a working state of the flushing pipe under another situation in Fig. 3.

[0027] Fig. 6 is a locally enlarged schematic diagram of a position C in Fig. 3.

[0028] Fig. 7 is an A-A sectional three-dimensional structural schematic diagram in Fig. 1.

[0029] Fig. 8 is a right schematic diagram in Fig. 7.

[0030] Fig. 9 is another B-B sectional schematic diagram of the present invention in Fig. 2.

[0031] Description of drawing marks: 1, screening pool; 2, washing area; 3, overflow baffle; 4, overflow groove; 5, flushing pipe; 6, screening plate; 7, main water pipe; 8, bottom-layer pipe; 9, schematic diagram of water flow rolling; 10, filtering screen; 31, bevel; 32, included angle; 41, sloping bottom; 42, drainage pipe; 51, flushing pipe water spray hole; 61, screening hole; 62, spacing bar; 81, bottom-layer pipe water spray hole.

DETAILED DESCRIPTION OF THE PRESENT INVENTION [0032] As shown in Fig. 4, another structure of a flushing pipe of the present invention when in work is described as follows: a connecting line between the center of flushing pipe water spray holes 51 on the flushing pipe 5 and the center of the cross section of the flushing pipe 5 is intersected with a horizontal line of the maximum water level of a washing area 2, and the point of intersection is close to one side of an overflow groove (4). The structure under the situation is applicable to the situation that the impact force on the liquid level needs to be adjusted.

[0033] As shown Fig.l to Fig. 3, the specific structure of the present invention is described as follows: a mica sheet screening and washing device used in a production process of mica paper comprises a screening pool 1, wherein the screening pool 1 is divided into a washing area 2 and an overflow groove 4 by an overflow baffle 3, and the top end of the overflow baffle 3 is lower than the peripheral height of the screening pool 1; a screening plate 6 is arranged at the lower end of the washing area 2, a bottom-layer pipe 8 is arranged under the screening plate 6, a plurality of bottom-layer pipe water spray holes 81 are arranged in the side wall of the bottom-layer pipe 8, and the bottom-layer pipe 8 is connected to tap water by a main water pipe 7 arranged at the outer part of the screening pool 1; one side of the upper end of the washing area 2, which is opposite to the overflow baffle 3, is provided with a flushing pipe 5, a plurality of flushing pipe water spray holes 51 are arranged in rows at one side of the side wall of the flushing pipe 5, which is oriented towards the overflow baffle 3, and the flushing pipe 5 is connected to the tap water after penetrating through the outer wall of the screening pool 1; and a drainage pipe 42 is arranged under the overflow groove 4.

[0034] As shown in Fig. 3, preferably, the upper surface of the overflow baffle 3 is a bevel 31, and one side of the bevel 31, which is close to the overflow groove 4, is lower than one side of the bevel 31 which is close to the washing area 2. In such design, thin impurities and the like floating above the liquid flow can conveniently flow out when overflowing and are discharged through the overflow groove 4.

[0035] As shown in Fig. 3 and Fig. 6, preferably, two rows of bottom-layer pipe water spray holes 81 are arranged in the side wall of the bottom-layer pipe 8 and are arranged symmetrically along the vertical direction, and projections of the bottom-layer pipe water spray holes 81 along the axial direction of the bottom-layer pipe 8 are separated by 45 degrees. In this manner, a vortex is formed in a way that high-pressure water columns sprayed by the bottom-layer pipe water spray holes 81 rebound after touching the bottom of the pool (see a schematic diagram 9 of water flow rolling in Fig. 6); a rolling water flow is formed under the liquid level in the washing area 2; multiple water flows are adopted to form turbulence to realize 360-degree flushing in a floatation state of mica sheets; and the impurities attached to the surfaces of the mica sheets are thoroughly scoured off; and the mica sheets are almost not damaged due to flexibility of the water flow.

[0036] As shown in Fig. 5, one structure of the flushing pipe of the present invention during work is described as follows: the connecting line between the center of the flushing pipe water spray holes 51 on the flushing pipe 5 and the center of the cross section of the flushing pipe 5 is level with the top end of the overflow baffle 3. In the rolling process of the liquid flow, the impurities (such as mud, chippings and the like) attached to the mica sheets are rushed to the overflow groove 4 when floating out of the liquid flow and are discharged through the overflow groove 4 after flowing through the overflow baffle 3. Therefore, the structure under the situation is applicable to cleaning of the liquid level of a smaller floating object.

[0037] As shown in Fig. 1, preferably, a plurality of screening holes 61 are arranged in the screening plate 6 in rows, and the upper surface of the screening plate 6 between two rows of screening holes 61 is horizontally provided with spacing bars 62. Through adoption of the spacing bars, a clearance between the screening plate 6 and a basket for containing the mica sheet or the bottom layers of the mica sheets is conveniently formed, so as to facilitate formation of the schematic diagram 9 of water flow rolling in Fig. 6.

[0038] Preferably, the height from the bottom-layer pipe 8 to the pool bottom of the screening pool 1 is 1/5-1/4 of the height of the overflow baffle 3. The appropriate water spray rebounding height is greatly helpful for the formation of turbulence and is conductive to the rolling of the liquid flow. 1/5 of the height value of the overflow baffle 3 is preferentially adopted.

[0039] Preferably,, the screening plate 6 can be arranged on the inner wall of the screening pool 1 movably up and down and is kept horizontal. In this manner, the washed mica sheets can be conveniently transferred out of the screening pool 1.

[0040] As shown in Fig. 7 and Fig. 8, preferably, the bottom surface of the overflow groove 4 is a bevel, and the part of the bevel, which is close to one end of the drainage pipe 42, is lower, thereby facilitating the discharge of pulp overflowed and discharged from the device.

[0041] As shown in Fig. 9, preferably, a detachable filtering screen 10 used for collecting small mica sheets is arranged on the side surface of the overflow groove 4 on the overflow baffle 3. The additionally arranged filtering screen 10 can collect a part of mica sheets scoured from the washing area 2 by the liquid flow, thereby avoiding damage to the mica sheets.

[0042] During specific use, as shown in Fig. 1, Fig. 3 and Fig. 6, firstly, water is fully stored in the washing area 2 of the screening pool 1, and the water can be added by an external pipe in the water storage process; then, the water flows into the flushing pipe 5 and the bottom-layer pipe 8, so that the water flow under the liquid level of the washing area 2 forms a state shown in Fig. 3 and Fig. 6, i.e., a state of the schematic diagram 9 of water flow rolling; and next, mica sheets to be washed are poured into the liquid flow of the washing area 2, and in the rolling process of the liquid flow, the impurities (such as mud, chippings and the like) attached to the mica sheets are rushed to the overflow groove 4 when floating out of the liquid flow and are discharged through the overflow groove 4 after flowing through the overflow baffle 3, therefore, the mica sheets are washed.

[0043] The screening plate 6 can be arranged on the inner wall of the screening pool 1 movably up and down and is kept horizontal, thereby facilitating the transfer of the washed mica sheets from the screening pool 1.

[0044] According to the mica sheet screening and washing device used in the production process of the mica paper, the soil impurities and the like in the mica sheets are thoroughly washed and filtered in a turbulence floatation manner, and the diameter of the mica sheets is almost not damaged, so that the mica sheets are protected while convenience and clearness are realized, thereby being conductive to improving the quality grade of the mica paper product.

[0045] It should be noted that, in the text, the terms, such as “comprise”, “contain” or any other variants, is meant to cover non-exclusive inclusion, so that a process, a method, an article or a device, including a series of elements, not only includes those elements, but also includes other elements that are not clearly listed, or includes inherent elements for the process, the method, the article or the device.

[0046] The principles and the implementation manners of the present invention are explained through application of specific examples, but the descriptions of the above embodiments are only used for helping understanding the method and the core concept of the present invention. The above descriptions are only the preferential implementation manners of the present invention; it should be noted that, due to the limitation of literal expression, infinite specific structures exist objectively; and those ordinary skilled in the art can make several improvements, polishes or changes or combine the above technical features in an appropriate manner on the premise of not departing from the principles of the present invention; and those improvements, polishes, changes or combinations, or the condition that the concept and the technical solution of the present invention are directly applied to other occasions without improvements shall be considered to belong to the protection scope of the present invention.

Claims

1. A mica sheet screening and washing device used in a production process of mica paper, comprising a screening pool (1) and characterized in that: the screening pool (1) is divided into a washing area (2) and an overflow groove (4) by an overflow baffle (3), and the top end of the overflow baffle (3) is lower than the peripheral height of the screening pool (1); a screening plate (6) is arranged at the lower end of the washing area (2), a bottom-layer pipe (8) is arranged under the screening plate (6), a plurality of bottom-layer pipe water spray holes (81) are arranged in the side wall of the bottom-layer pipe (8), and the bottom-layer pipe (8) is connected to tap water by a main water pipe (7) arranged at the outer part of the screening pool (1); one side of the upper end of the washing area (2) opposite to the overflow baffle (3) is provided with a flushing pipe (5); a plurality of flushing pipe water spray holes (51) are arranged in rows at one side oriented towards the overflow baffle (3) of the side wall of the flushing pipe (5); the flushing pipe (5) is connected to the tap water after penetrating through the outer wall of the screening pool (1); and a drainage pipe (42) is arranged under the overflow groove (4).

2. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: the upper surface of the overflow baffle (3) is a bevel (31), and one side of the bevel (31) close to the overflow groove (4) is lower than one side close to the washing area (2).

3. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: two rows of bottom-layer pipe water spray holes (81) are arranged in the side wall of the bottom-layer pipe (8) and are arranged symmetrically along the vertical direction, and projections of the bottom-layer pipe water spray holes (81) along the axial direction of the bottom-layer pipe (8) are separated by 45 degrees.

4. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: a connecting line between the center of the flushing pipe water spray holes (51) on the flushing pipe (5) and the center of the cross section of the flushing pipe (5) is level with the top end of the overflow baffle (3).

5. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: the connecting line between the center of the flushing pipe water spray holes (51) on the flushing pipe (5) and the center of the cross section of the flushing pipe (5) is intersected with a horizontal line of the maximum water level of the washing area (2), and the point of intersection is close to one side of the overflow groove (4).

6. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: a plurality of screening holes (61) are arranged in the screening plate (6) in rows, and the upper surface of the screening plate (6) between two rows of screening holes (61) is horizontally provided with spacing bars (62).

7. The mica sheet screening and washing device used in the production process of the mica paper according to claim 1, characterized in that: the height from the bottom-layer pipe (8) to the pool bottom of the screening pool (1) is 1/5-1/4 of the height of the overflow baffle (3).

8. The mica sheet screening and washing device used in the production process of the mica paper according to any of claims 1-7, characterized in that: the screening plate (6) is arranged on the inner wall of the screening pool (1) movably up and down and is kept horizontal.

9. The mica sheet screening and washing device used in the production process of the mica paper according to any of claims 1-7, characterized in that: the bottom surface of the overflow groove (4) is a bevel, and the part of the bevel close to one end of the drainage pipe (42) is lower.