Pneumatic adsorption device for removing powder particles on surface of diaphragm before powder coating

Abstract

The utility model relates to a pneumatic adsorption device for removing powder particles on the surface of a diaphragm before powder coating, which comprises an air inlet part, a blowing part and an adhesion part, the top of the blowing part is provided with an air inlet plate, the bottom of the blowing part is provided with an exhaust plate, the adhesion part is positioned on the blowing part, the air inlet part is communicated with an air inlet, and the air outlet part is communicated with an air outlet. The exhaust plate comprises a first flow equalizing plate parallel to the horizontal plane and an arc-shaped second flow equalizing plate, the first flow equalizing plate is provided with a first flow equalizing hole communicated with the inner cavity of the purging part, and the axis of the first flow equalizing hole is perpendicular to the horizontal plane; the second flow equalizing plate is provided with second flow equalizing holes communicated with the inner cavity of the purging part, and the acute included angle between the axis of each second flow equalizing hole and the horizontal plane ranges from 25 degrees to 35 degrees. According to the device, during blowing, not only can powder particles attached to the membrane be blown up, but also powder particles slightly embedded in the membrane can be blown up, and after the powder particles are blown up, the powder particles possibly falling onto the surface of the membrane again can be attached to the adhesion part in the rising process of the powder particles; and the film is prevented from falling onto the surface of the film again after falling.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic green body dust removal, and more specifically to a pneumatic adsorption device for removing powder particles on the surface of a membrane before powder coating. Background Art

[0002] In the manufacturing process of ceramic substrates, ceramic powder and organic solvents, binders, plasticizers, and dispersants are mixed by ball milling to form a slurry, which is then cast by a tape casting machine to form a slurry. The formed film is cut into different widths by a slitting knife at the end of the tape casting machine and then rolled up. It is then punched by a punching machine and subjected to powder coating, sintering, and subsequent processes. When the film is cut and rolled up by the tape casting machine cutter, some of the powder particles generated during the cutting will adhere to or be slightly embedded on the surface of the film. When there are powder particles on the surface of the film, during the subsequent powder coating and sintering process of the film, the powder particles will form sticky particles or pits on the surface of the film after sintering, affecting the quality of the film. Utility Model Content

[0003] In order to overcome the problem in the above-mentioned prior art that powder particles adhered to or micro-embedded on the surface of the diaphragm will form sticky particles or pits on the surface of the diaphragm during powder coating and sintering, thus affecting the quality of the diaphragm, the utility model provides a pneumatic adsorption device for removing powder particles on the surface of the diaphragm before powder coating. This solution can remove powder particles adhered and micro-embedded on the surface of the diaphragm by pneumatic means, avoid the formation of sticky particles or pits on the surface of the diaphragm during powder coating and sintering, and improve the quality of the diaphragm.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pneumatic adsorption device for removing powder particles on the surface of a diaphragm before powder coating, comprising an air intake part, a purging part and an adhesion part, the purging part is a hollow inner cavity, an air intake plate is provided on the top of the purging part, and an exhaust plate is provided on the bottom, the adhesion part is located on the outer side surface of the purging part and the bottom surface of the exhaust plate, the air intake part is connected with the inner cavity of the purging part through the air inlet on the air intake plate, the exhaust plate comprises a first flow equalizing plate parallel to the horizontal plane and an arc-shaped second flow equalizing plate, the first flow equalizing plate is provided with a first flow equalizing hole connected to the inner cavity of the purging part, and the axis of the first flow equalizing hole is perpendicular to the horizontal plane; the second flow equalizing plate is provided with a second flow equalizing hole connected to the inner cavity of the purging part, and the acute angle between the axis of the second flow equalizing hole and the horizontal plane is 25°-35°.

[0005] When removing the powder particles on the surface of the diaphragm, move the formed diaphragm to the purge station, and the air intake part starts to work. Air is taken into the inner cavity of the purge part through the air inlet on the air intake plate. The gas entering the inner cavity of the purge part will be blown out through the exhaust plate. Part of the gas is blown to the diaphragm surface through the first equalizing hole on the first equalizing plate, and the other part of the gas is blown to the diaphragm surface through the second equalizing hole on the second equalizing plate. The first equalizing plate is parallel to the horizontal plane and the axis of the first equalizing hole is perpendicular to the horizontal plane. The airflow coming out of the first equalizing hole is blown to the diaphragm surface in a direction perpendicular to the diaphragm. When the airflow blows onto the diaphragm, the powder particles adhering to the diaphragm surface are blown up, so that the powder particles adhering to the diaphragm surface are separated from the diaphragm. The second flow balancing plate is arc-shaped and the angle between the second flow balancing hole and the horizontal plane is 25°-35°. The airflow blown out from the second flow balancing hole blows toward the surface of the diaphragm in an inclined direction. When the airflow blows onto the diaphragm, it provides a force parallel to the direction of the diaphragm surface to the powder particles micro-embedded on the surface of the diaphragm, and blows the powder particles micro-embedded on the surface of the diaphragm up from the diaphragm. After the powder particles are blown up from the diaphragm, part of the powder particles will fall to the outside of the diaphragm during the falling process, and the other part may fall back onto the diaphragm. The powder particles that may fall back onto the surface of the diaphragm are adhered to the outer side surface of the purge part and the adhesion part of the bottom surface of the exhaust plate during the process of being blown up, preventing them from falling and preventing the powder particles from falling back onto the diaphragm.

[0006] The device in the present application uses airflow blowing to remove powder particles on the surface of the diaphragm to avoid direct contact with the diaphragm and damage to the diaphragm. During the blowing, not only the powder particles adhering to the diaphragm can be blown up, but also the powder particles micro-embedded on the diaphragm can be blown up. After the powder particles are blown up, the powder particles that may fall back onto the diaphragm surface will adhere to the adhesion part during their rise, avoiding falling back onto the diaphragm surface after falling. After the powder particles on the diaphragm are removed, no sticky particles or pits will be formed on the surface of the diaphragm during powder coating and sintering, which can improve the quality of the diaphragm.

[0007] Preferably, in the vertical direction, the distance between the lowest point of the second equalizing plate and the plane where the first equalizing plate is located is 10mm-15mm, and the acute angle between the tangent line at the highest point of the second equalizing plate and the horizontal plane is 8°-12°. When the distance between the lowest point of the arc-shaped second equalizing plate and the plane where the first equalizing plate is located is 10mm-15mm, and the acute angle between the tangent line at the highest point and the horizontal plane is 8°-12°, after the gas is blown out through the second equalizing hole on the second equalizing plate, the effect of blowing up the powder particles micro-embedded on the diaphragm is the best, and at this time, the powder particles micro-embedded at various positions on the surface of the diaphragm can be blown up.

[0008] Preferably, it also includes a partition plate for dividing the inner cavity of the purge part into a first flow equalizing cavity and a second flow equalizing cavity, the partition plate is fixedly connected to the purge part, the air inlet includes a first air inlet and a second air inlet, the first air inlet and the first flow equalizing hole are both connected to the first flow equalizing cavity, and the second air inlet and the second flow equalizing hole are both connected to the second flow equalizing cavity. Since the powder particles micro-embedded on the surface of the diaphragm are more difficult to be blown up than the powder particles adhering to the surface of the diaphragm, a stronger wind force is required to blow up the powder particles micro-embedded on the surface of the diaphragm. After the inner cavity of the purge part is separated, the pressure of the first flow equalizing cavity and the second flow equalizing cavity can be adjusted respectively, and then the airflow intensity blown out from the first flow equalizing hole and the second flow equalizing hole can be adjusted respectively, so that the airflow blown out from the first flow equalizing hole has enough impact force to blow up the powder particles adhering to the surface of the diaphragm, and the airflow blown out from the second flow equalizing hole has enough impact force to blow up the powder particles micro-embedded on the surface of the diaphragm. Experimental measurements have shown that when the pressure in the first flow equalizing chamber is 0.05MPa-0.06MPa, the airflow blown out from the first flow equalizing hole has enough impact force to blow up the powder particles adhering to the surface of the diaphragm; when the pressure in the second flow equalizing chamber is 0.10MPa-0.2MPa, the airflow blown out from the second flow equalizing hole has enough impact force to blow up the powder particles micro-embedded on the surface of the diaphragm.

[0009] Preferably, the first flow balancing hole and the second flow balancing hole are both oblong holes. The exhaust hole on the exhaust plate is an oblong hole, and the airflow blown out from the oblong hole has a greater impact force on the surface of the diaphragm. When the distance between the first flow balancing plate and the diaphragm is 20mm-30mm, the radius of the semicircle on the oblong hole is 3mm-5mm, and the rectangular length of the oblong hole is 5mm-7mm, the airflow blown out from the first flow balancing hole and the second flow balancing hole can smoothly blow up the powder particles adhering to the diaphragm and micro-embedded in the diaphragm.

[0010] Preferably, the first flow balancing holes are arranged in an array on the first flow balancing plate. The first flow balancing holes are arranged in an array on the first flow balancing plate, and the airflow intensity blown out by each first flow balancing hole is the same. When the edge distance between two adjacent first flow balancing holes is 2.5mm-3.5mm, the effect of blowing up the adhered powder particles is better. The specific distance can be selected according to actual conditions.

[0011] Preferably, the second flow equalizing holes are arranged in a staggered manner on the arc-shaped second flow equalizing plate. Since the second flow equalizing plate is arc-shaped, when the second flow equalizing holes are arranged in a staggered manner on the second flow equalizing plate, the airflow blown out from the second flow equalizing plate can be blown to the diaphragm more evenly. When the distance between two adjacent second flow equalizing holes in the same column is 2.5mm-3.5mm, and when the distance between the edges of two adjacent second flow equalizing holes in two columns is 2.5mm-3.5mm, the effect of blowing up the powder particles embedded in the diaphragm is better, and the specific distance can be selected according to the actual situation.

[0012] Preferably, the cross section of the air inlet is a polygon. There are several first air inlets, and the several first air inlets are arranged in an array on the air inlet plate; there are several second air inlets, and the several second air inlets are arranged in an array on the air inlet plate. The cross section of the air inlet is a polygon, preferably a regular hexagon. The flow resistance of the gas is small when the air inlet part takes in air, the gas is more evenly distributed in the upper and lower gas fields of the inner cavity of the purge part, and the gas pressure gradient is more consistent, which can further ensure that the gas in the first flow equalizing cavity can be evenly discharged from the first flow equalizing hole, and the gas in the second flow equalizing cavity can be evenly discharged from the second flow equalizing hole. The regular hexagon is easier to process. There are several first air inlets and several second air inlets, which has a faster air intake speed for the first flow equalizing cavity and the second flow equalizing cavity, and can provide sufficient gas for the purge part to ensure the intensity of the air flow blown out from the purge part.

[0013] Preferably, the air inlet plate is provided with a fixing bolt, which is threadedly connected to the top of the purge part; the exhaust plate is provided with an adjustable bolt, which is threadedly connected to the threaded hole at the bottom of the purge part. Both the air inlet plate and the exhaust plate are bolted to the purge part, and the bolt connection has high connection strength and is easy to disassemble and assemble. At the same time, the adjustable bolt on the exhaust plate can also adjust the position of the exhaust plate by adjusting the length of the bolt extending into the purge part, thereby adjusting the distance between the exhaust plate and the diaphragm.

[0014] Preferably, the adhesion part is an adsorption mucosa. The adsorption mucosa is sticky and can well adhere and collect the flying powder particles to prevent them from falling onto the membrane again.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the device in the present application uses airflow blowing to remove the powder particles on the surface of the diaphragm, avoiding direct contact with the diaphragm and causing damage to the diaphragm. During the blowing, not only the powder particles adhering to the diaphragm can be blown up, but also the powder particles micro-embedded on the diaphragm can be blown up. After the powder particles are blown up, the powder particles that may fall back onto the surface of the diaphragm will adhere to the adhesion part during their rise, avoiding falling back onto the surface of the diaphragm after falling. After the powder particles on the diaphragm are removed, no sticky particles or pits will be formed on the surface of the diaphragm during powder coating and sintering, which can improve the quality of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a pneumatic adsorption device for removing powder particles on the surface of a membrane before powder coating according to the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of an exhaust plate of a pneumatic adsorption device for removing powder particles on the surface of a membrane before powder coating according to the utility model;

[0018] Figure 3 It is a cross-sectional view of a second flow balancing plate of a pneumatic adsorption device for removing powder particles on the surface of a diaphragm before powder coating according to the utility model.

[0019] Among them, 1. purge part; 2. air inlet plate; 3. exhaust plate; 4. adhesion part; 201. air inlet; 301. first flow equalizing plate; 302. second flow equalizing plate; 311. first flow equalizing hole; 321. second flow equalizing hole; 5. partition plate; 101. first flow equalizing cavity; 102. second flow equalizing cavity; 211. first air inlet; 212. second air inlet; 6. fixing bolt; 7. adjustable bolt. DETAILED DESCRIPTION

[0020] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0023] Example 1

[0024] like Figure 1-Figure 2 The embodiment of a pneumatic adsorption device for removing powder particles on the surface of a membrane before coating with powder is shown, comprising an air intake portion, a purge portion 1 and an adhesion portion 4. The purge portion 1 is a hollow inner cavity, an air intake plate 2 is provided on the top of the purge portion 1, and an exhaust plate 3 is provided on the bottom. The adhesion portion 4 is located on the outer side of the purge portion 1 and the bottom surface of the exhaust plate 3. The air intake portion is connected to the inner cavity of the purge portion 1 through an air inlet 201 on the air intake plate 2. The exhaust plate 3 comprises a first flow equalizing plate 301 parallel to the horizontal plane and an arc-shaped second flow equalizing plate 302. The first flow equalizing plate 301 is provided with a first flow equalizing hole 311 connected to the inner cavity of the purge portion 1, and the axis of the first flow equalizing hole 311 is perpendicular to the horizontal plane; the second flow equalizing plate 302 is provided with a second flow equalizing hole 321 connected to the inner cavity of the purge portion 1, and the acute angle A between the axis of the second flow equalizing hole 321 and the horizontal plane is 25°-35°, and A is preferably 30°. The adhesion portion 4 is an adsorption mucosa.

[0025] The working principle or working process of this device: when removing the powder particles on the surface of the diaphragm, the formed diaphragm is moved to the purge station, the air intake part starts to work, and the air is taken into the inner cavity of the purge part 1 through the air inlet 201 on the air intake plate 2. The gas entering the inner cavity of the purge part 1 will be blown out through the exhaust plate 3. A part of the gas is blown to the diaphragm surface through the first equalizing hole 311 on the first equalizing plate 301, and the other part of the gas is blown to the diaphragm surface through the second equalizing hole 321 on the second equalizing plate 302. The first equalizing plate 301 is parallel to the horizontal plane and the axis of the first equalizing hole 311 is perpendicular to the horizontal plane. The airflow coming out of the first equalizing hole 311 blows to the diaphragm surface in a direction perpendicular to the diaphragm. When the airflow blows to the diaphragm, the powder particles adhering to the diaphragm surface are blown up, so that the powder particles adhering to the diaphragm surface are separated from the diaphragm. The second flow balancing plate 302 is arc-shaped and the angle A between the second flow balancing hole 321 and the horizontal plane is 25°-35°. The airflow blown out from the second flow balancing hole 321 blows toward the surface of the diaphragm in an inclined direction. When the airflow blows onto the diaphragm, it provides a force parallel to the direction of the diaphragm surface to the powder particles micro-embedded on the surface of the diaphragm, and blows the powder particles micro-embedded on the surface of the diaphragm up from the diaphragm. After the powder particles are blown up from the diaphragm, part of the powder particles will fall to the outside of the diaphragm during the falling process, and the other part may fall back onto the diaphragm. The powder particles that may fall back onto the surface of the diaphragm are adhered to the outer side surface of the purge part 1 and the adhesion part 4 on the bottom surface of the exhaust plate 3 during the process of being blown up, preventing them from falling and preventing the powder particles from falling back onto the diaphragm.

[0026] Beneficial effects of this embodiment: The device in this application uses airflow blowing to remove powder particles on the surface of the diaphragm, avoiding direct contact with the diaphragm and causing damage to the diaphragm. During the blowing, not only the powder particles adhering to the diaphragm can be blown up, but also the powder particles micro-embedded on the diaphragm can be blown up. After the powder particles are blown up, the powder particles that may fall back onto the surface of the diaphragm will adhere to the adhesion part 4 during their rise, avoiding falling back onto the surface of the diaphragm after falling. After the powder particles on the diaphragm are removed, no sticky particles or pits will be formed on the surface of the diaphragm during powder coating and sintering, which can improve the quality of the diaphragm.

[0027] Example 2

[0028] Embodiment 2 of a pneumatic adsorption device for removing powder particles from the surface of a membrane before coating with powder, based on embodiment 1, as Figure 1-Figure 3 As shown, the structure of the purge part 1 is further limited.

[0029] Specifically, in the vertical direction, the distance between the lowest point of the second current balancing plate 302 and the plane where the first current balancing plate 301 is located is 10mm-15mm, preferably 10mm; the acute angle B between the tangent at the highest point of the second current balancing plate 302 and the horizontal plane is 8°-12°, and B is preferably 10°.

[0030] Specifically, it also includes a partition plate 5 for dividing the inner cavity of the purging part 1 into a first flow equalizing cavity 101 and a second flow equalizing cavity 102. The partition plate 5 is fixedly connected to the purging part 1. The air inlet 201 includes a first air inlet 211 and a second air inlet 212. The first air inlet 211 and the first flow equalizing hole 311 are both connected to the first flow equalizing cavity 101, and the second air inlet 212 and the second flow equalizing hole 321 are both connected to the second flow equalizing cavity 102. The air pressure in the first flow equalizing cavity 101 is 0.05MPa-0.06MPa; the air pressure in the second flow equalizing cavity 102 is 0.10MPa-0.2MPa.

[0031] Specifically, the air inlet plate 2 is provided with a fixing bolt 6 , which is threadedly connected to the top of the purge part 1 ; the air exhaust plate 3 is provided with an adjustable bolt, which is threadedly connected to the threaded hole at the bottom of the purge part 1 .

[0032] The beneficial effects of this embodiment are as follows: when the distance between the lowest point of the arc-shaped second flow equalizing plate 302 and the plane where the first flow equalizing plate 301 is located is 10mm-15mm, and the acute angle B between the tangent of the highest point and the horizontal plane is 8°-12°, after the gas is blown out through the second flow equalizing hole 321 on the second flow equalizing plate 302, the blowing effect on the powder particles micro-embedded on the diaphragm is the best, and at this time, the powder particles micro-embedded at various positions on the surface of the diaphragm can be blown up.

[0033] After the inner cavity of the purge part 1 is separated, the pressure of the first flow balancing chamber 101 and the second flow balancing chamber 102 can be adjusted respectively, and then the airflow intensity blown out from the first flow balancing hole 311 and the second flow balancing hole 321 can be adjusted respectively, so that the airflow blown out from the first flow balancing hole 311 has enough impact force to blow up the powder particles adhering to the surface of the diaphragm, and the airflow blown out from the second flow balancing hole 321 has enough impact force to blow up the powder particles slightly embedded on the surface of the diaphragm. When the pressure in the first flow balancing chamber 101 is 0.05MPa-0.06MPa, the airflow blown out from the first flow balancing hole 311 has enough impact force to blow up the powder particles adhering to the surface of the diaphragm; when the pressure in the second flow balancing chamber 102 is 0.10MPa-0.2MPa, the airflow blown out from the second flow balancing hole 321 has enough impact force to blow up the powder particles slightly embedded on the surface of the diaphragm.

[0034] The air inlet plate 2 and the exhaust plate 3 are both connected with the purge part 1 by bolts, and the bolt connection has high connection strength and is easy to disassemble and assemble. At the same time, the adjustable bolts on the exhaust plate 3 can also adjust the position of the exhaust plate 3 by adjusting the length of the bolts extending into the purge part 1, thereby adjusting the distance between the exhaust plate 3 and the diaphragm.

[0035] Example 3

[0036] An embodiment of a pneumatic adsorption device for removing powder particles on the surface of a membrane before coating with powder, based on Embodiment 1 and Embodiment 2, as Figure 1-Figure 2 As shown, the first flow balancing hole 311 , the second flow balancing hole 321 and the air inlet 201 are further defined.

[0037] Specifically, the first flow balancing hole 311 and the second flow balancing hole 321 are both oblong holes, and the semicircle radius on the oblong hole is 3 mm-5 mm, preferably 4 mm; the rectangular length of the oblong hole is 5 mm-7 mm, preferably 6 mm.

[0038] Specifically, the first flow balancing holes 311 are arranged in an array on the first flow balancing plate 301, and the edge spacing between two adjacent first flow balancing holes 311 is 2.5 mm-3.5 mm, preferably 3 mm.

[0039] Specifically, the second flow equalizing holes 321 are arranged in a staggered manner on the arc-shaped second flow equalizing plate 302, and the edge distance between two adjacent second flow equalizing holes 321 in the same column is 2.5mm-3.5mm, preferably 3mm, and the edge distance between the second flow equalizing holes 321 in two adjacent columns is 2.5mm-3.5mm, preferably 3mm.

[0040] Specifically, the cross section of the air inlet 201 is hexagonal. There are two first air inlets 211 and two second air inlets 212 .

[0041] Beneficial effects of this embodiment: the exhaust holes on the exhaust plate 3 are oblong holes, and the airflow blown out from the oblong holes has a greater impact force on the surface of the diaphragm. When the distance between the first flow balancing plate 301 and the diaphragm is 20mm-30mm, the radius of the semicircle on the oblong hole is 3mm-5mm, and the rectangular length of the oblong hole is 5mm-7mm, the airflow blown out from the first flow balancing hole 311 and the second flow balancing hole 321 can smoothly blow up the powder particles adhering to and slightly embedded in the diaphragm.

[0042] The first flow balancing holes 311 are arranged in an array on the first flow balancing plate 301. The airflow intensity blown out by each first flow balancing hole 311 is the same. When the edge distance between two adjacent first flow balancing holes 311 is 2.5mm-3.5mm, the effect of blowing off the adhered powder particles is better.

[0043] When the second flow balancing holes 321 are arranged in a staggered manner on the second flow balancing plate 302, the airflow blown out from the second flow balancing plate 302 can be blown toward the diaphragm more evenly. When the distance between two adjacent second flow balancing holes 321 in the same row is 2.5mm-3.5mm, and when the distance between the edges of two adjacent second flow balancing holes 321 in two rows is 2.5mm-3.5mm, the effect of blowing up the powder particles embedded in the diaphragm is better.

[0044] The cross section of the air inlet 201 is a regular hexagon, which is easier to process. At this time, the flow resistance of the gas is small when the air inlet is inlet, and the gas is more evenly distributed in the upper and lower gas fields of the inner cavity of the purge part 1. The gas pressure gradient is also more consistent, which can further ensure that the gas in the first flow-equalizing cavity 101 can be evenly discharged from the first flow-equalizing hole 311, and the gas in the second flow-equalizing cavity 102 can be evenly discharged from the second flow-equalizing hole 321. There are two first air inlets 211 and two second air inlets 212, which have faster air intake speeds for the first flow-equalizing cavity 101 and the second flow-equalizing cavity 102, and can provide sufficient gas for the purge part 1, ensuring the strength of the air flow blown out from the purge part 1.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A pneumatic adsorption device for removing powder particles on the surface of a membrane before coating, characterized in that: The invention comprises an air intake portion, a purge portion (1) and an adhesion portion (4); the purge portion (1) is a hollow inner cavity; an air intake plate (2) is provided at the top of the purge portion (1) and an exhaust plate (3) is provided at the bottom; the adhesion portion (4) is located on the outer side surface of the purge portion (1) and the bottom surface of the exhaust plate (3); the air intake portion is connected to the inner cavity of the purge portion (1) through an air intake port (201) on the air intake plate (2); The exhaust plate (3) comprises a first flow balancing plate (301) parallel to a horizontal plane and an arc-shaped second flow balancing plate (302), wherein the first flow balancing plate (301) is provided with a first flow balancing hole (311) connected to the inner cavity of the purge portion (1), and the axis of the first flow balancing hole (311) is perpendicular to the horizontal plane; the second flow balancing plate (302) is provided with a second flow balancing hole (321) connected to the inner cavity of the purge portion (1), and the acute angle between the axis of the second flow balancing hole (321) and the horizontal plane is 25°-35°.

2. The pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 1 is characterized in that: In the vertical direction, the distance between the lowest point of the second current balancing plate (302) and the plane where the first current balancing plate (301) is located is 10 mm-15 mm, and the acute angle between the tangent line of the highest point of the second current balancing plate (302) and the horizontal plane is 8°-12°.

3. A pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 2, characterized in that: It also includes a partition plate (5) for dividing the inner cavity of the purge part (1) into a first flow equalizing cavity (101) and a second flow equalizing cavity (102); the partition plate (5) is fixedly connected to the purge part (1); the air inlet (201) includes a first air inlet (211) and a second air inlet (212); the first air inlet (211) and the first flow equalizing hole (311) are both connected to the first flow equalizing cavity (101); the second air inlet (212) and the second flow equalizing hole (321) are both connected to the second flow equalizing cavity (102).

4. The pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 3 is characterized in that: The first flow balancing hole (311) and the second flow balancing hole (321) are both oblong holes.

5. The pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 4, characterized in that: The first flow balancing holes (311) are arranged in an array on the first flow balancing plate (301).

6. The pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 4, characterized in that: The second flow balancing holes (321) are arranged in a staggered manner on the arc-shaped second flow balancing plate (302).

7. The pneumatic adsorption device for removing powder particles on the surface of a membrane before coating according to claim 3, characterized in that: The cross section of the air inlet is polygonal.

8. A pneumatic adsorption device for removing powder particles on the surface of a membrane before coating with powder according to claim 7, characterized in that: There are a plurality of first air inlets (211), and the plurality of first air inlets (211) are arranged in an array on the air inlet plate (2); there are a plurality of second air inlets (212), and the plurality of second air inlets (212) are arranged in an array on the air inlet plate (2).

9. A pneumatic adsorption device for removing powder particles from the surface of a membrane before powder coating according to any one of claims 1 to 8, characterized in that: The air inlet plate (2) is provided with a fixing bolt (6), and the fixing bolt (6) is threadedly connected to the top of the purge portion (1); the air exhaust plate (3) is provided with an adjustable bolt, and the adjustable bolt is threadedly connected to the threaded hole at the bottom of the purge portion (1).

10. A pneumatic adsorption device for removing powder particles from the membrane surface before powder coating according to any one of claims 1 to 8, characterized in that: The adhesive part (4) is an adsorbent mucosa.

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