CN114470878A

CN114470878A - Centrifugal vacuum extractor

Info

Publication number: CN114470878A
Application number: CN202210188277.6A
Authority: CN
Inventors: 胡建华; 李艳; 许光耀; 王国元; 胡道生; 徐添宇
Original assignee: Guangdong Shilihe Automobile Material Co ltd
Current assignee: Guangdong Shilihe Automobile Material Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-05-13

Abstract

The invention discloses a centrifugal vacuum-pumping device, which comprises a vacuum tank, wherein a feeding hole is arranged on the vacuum tank; the method is characterized in that: install the dustcoat in the vacuum chamber, the below cover of dustcoat is equipped with the inner shell structure of cross-section grow gradually from top to bottom, the dustcoat forms the passageway that makes coating flow to the vacuum chamber in proper order through the outer wall of feed inlet, dustcoat, inner shell structure with inner shell structure clearance fit and the upper end and the feed inlet intercommunication of this dustcoat, and, the inner shell structure is connected with a driving motor and is used for driving the rotation of inner shell structure and with the coating of outflow passageway get rid of to the inner wall of vacuum chamber. The invention is suitable for high-viscosity paint, and has the advantages of rapid degassing, high degassing rate and the like.

Description

Centrifugal vacuum extractor

Technical Field

The invention relates to the field of vacuumizing devices, in particular to a centrifugal vacuumizing device.

Background

The polyurethane coating for the automobile has high viscosity, is very easy to wrap a large amount of gas in the processes of preparation, production, transfer and the like, can cause the performance reduction of the polyurethane coating after film forming, is accompanied with appearance defects, and therefore, the coating needs to be defoamed. The traditional stirring or static vacuum degassing technology is convenient to use and low in cost, is usually used under the condition that the viscosity of the coating is relatively low, and for high-viscosity coatings, the contact area between the coating and vacuum is increased by improving a stirring mode to increase the probability that the coating rolls to the surface inside so as to remove air mixed in the high-viscosity coating, but the problems of long degassing time, low degassing rate and the like still exist.

How to solve the above problems is a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to provide a centrifugal vacuum-pumping device which is suitable for high-viscosity paint, can quickly degas and has high degassing rate.

In order to realize the purpose, the invention adopts the following technical scheme:

the invention provides a centrifugal vacuum-pumping device, which comprises a vacuum tank, wherein a feed inlet is arranged on the vacuum tank, an outer cover is arranged in the vacuum tank, an inner shell structure with the cross section gradually enlarged from top to bottom is covered below the outer cover, the outer cover is in clearance fit with the inner shell structure, the upper end of the outer cover is communicated with the feed inlet to form a channel, and coating sequentially flows into the vacuum tank through the feed inlet, the outer cover and the outer wall of the inner shell structure, and the inner shell structure is connected with a driving motor and used for driving the inner shell structure to rotate and throwing the coating flowing out of the channel onto the inner wall of the vacuum tank.

Further, the inner shell structure includes that the diameter from top to bottom gradually becomes big round platform shape stand membrane casing, height-adjustable's material piece, stand membrane casing, stand material piece from bottom to top install in proper order on driving motor's output shaft and stand membrane casing, stand material piece all with dustcoat clearance fit.

Further, it includes integrated into one piece's flat material platform, conical reposition of redundant personnel to stand the material spare, reposition of redundant personnel lie in the top surface of flat material platform and the flat material platform, reposition of redundant personnel all with dustcoat clearance fit, and be provided with at least a slice gasket between flat material platform and the membrane spreading shell, driving motor's output shaft passes membrane spreading shell, gasket and flat material platform threaded connection in proper order.

Further, the dustcoat is including the cover body, the cover body covers the outside of locating inner shell structure and this cover body shape of inboard and inner shell structure's shape looks adaptation and both clearance fit, and, the upper end of the cover body is connected with the honeycomb duct, the both ends of honeycomb duct communicate with the inboard of feed inlet, the cover body respectively.

Furthermore, the upper end of the flow dividing body is connected with a limiting shaft, and the upper end of the limiting shaft extends into the flow guide pipe and is in clearance fit with the flow guide pipe.

Furthermore, the film spreading shell, the platform, the flow dividing body, the limiting shaft, the gasket, the cover body and the flow guide pipe are all coaxial with the output shaft of the driving motor.

Due to the adoption of the structure, the invention has the following beneficial effects:

according to the invention, the inner shell structure with the gradually-increased cross section from top to bottom is arranged, the outer cover is in clearance fit with the inner shell structure, the upper end of the outer cover is communicated with the feed inlet to form a channel which enables the coating to flow into the vacuum tank through the feed inlet, the outer cover and the outer wall of the inner shell structure in sequence, meanwhile, the inner shell structure is driven to rotate axially by the driving motor, under the action of centrifugal force, the high-viscosity coating can be adhered to the outer wall of the inner shell structure and spread out to form a continuous film, so that the contact area of the coating and vacuum is rapidly increased, air mixed in the coating can be continuously degassed under vacuum suction, and when the coating flows out of the channel, the degassed coating can be thrown onto the inner wall of the vacuum tank, the coating slowly flows down along the tank wall, secondary air introduced by free landing impact is avoided, and finally the coating is collected at the bottom of the tank and flows out of the vacuum tank. Therefore, the invention is suitable for high-viscosity paint, can continuously and quickly spread the paint to form a film in contact with vacuum, and has quick degassing and high degassing rate.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the centrifugal vacuum pumping device provided by the present invention comprises a vacuum tank 1, a feed port 2 is installed on the vacuum tank 1, an outer cover 3 is installed in the vacuum tank 1, an inner shell structure 4 with a gradually increasing cross section is covered under the outer cover 3, the outer cover 3 is in clearance fit with the inner shell structure 4, and the upper end of the outer cover 3 is communicated with the feed port 2 to form a channel through which a coating flows into the vacuum tank 1 sequentially via the feed port 2, the outer cover 3 and the outer wall of the inner shell structure 4, and the inner shell structure 4 is connected with a driving motor 5 for driving the inner shell structure 4 to rotate and throwing the coating flowing out of the channel onto the inner wall of the vacuum tank 1. When the coating material is used, the coating material sequentially falls onto the inner shell structure 4 through the feeding hole 2 and the outer cover 3, the inner shell structure 4 is driven to rotate by the driving motor 5 in the process that the coating material flows downwards along the outer wall of the inner shell structure 4 under the action of gravity, the coating material adhered to the outer wall of the inner shell structure 4 is spread out to form a continuous film under the action of centrifugation, and finally the coating material flows to the bottom of the outer wall of the inner shell structure 4 and out of the outflow channel under the action of gravity, is thrown onto the inner wall of the vacuum tank under the action of centrifugation, and slowly flows downwards along the tank wall until being gathered to the discharge hole 4; the cross-section of inner shell structure 4 from top to bottom grow gradually, and this inner shell structure 4's centrifugal force top-down crescent, the coating of adhesion on the outer wall of inner shell structure 4 can be spread out more thinly more from top to bottom to through the dustcoat 3 of cover in the inner shell structure 4 outside, can avoid centrifugal force too big to lead to the coating to get rid of from the outer wall of inner shell structure 4 before flowing the bottom of inner shell structure 4.

In the invention, the inner shell structure 4 comprises a circular truncated cone-shaped film spreading shell 41 with the diameter gradually increased from top to bottom and a material spreading part 42 with adjustable height, the film spreading shell 41 and the material spreading part 42 are sequentially arranged on an output shaft of the driving motor 5 from bottom to top, and the film spreading shell 41 and the material spreading part 42 are in clearance fit with the outer cover 3. The driving motor 5 simultaneously drives the film spreading shell 41 and the material spreading part 42 to rotate, under the centrifugal action and the gravity action, the coating is initially spread by the material spreading part 42, and then the coating is further rotated and spread into a continuous film by the film spreading shell 41.

In the invention, the material spreading member 42 comprises an integrally formed material leveling platform 421 and a conical flow distribution body 422, the flow distribution body 422 is positioned on the top surface of the material leveling platform 421, the material leveling platform 421 and the flow distribution body 422 are in clearance fit with the outer cover 3, the coating flows to the top surface of the material leveling platform 421 through the flow distribution body 422 and is spread, and the coating forms a coating layer with the same thickness through the clearance between the material leveling platform 421 and the outer cover 3; and at least one gasket 423 is arranged between the leveling platform 421 and the film spreading shell 41, the output shaft of the driving motor 5 sequentially passes through the film spreading shell 41 and the gasket 423 to be in threaded connection with the leveling platform 421, and the size of the gap between the leveling platform 421 and the outer cover 3 can be adjusted by adjusting the number of the gaskets 423, so that the thickness of the coating layer is controlled.

In the invention, the outer cover 3 comprises a cover body 31, the cover body 31 covers the outer side of the inner shell structure 4, the shape of the inner side of the cover body 31 is matched with that of the inner shell structure 4, the inner side of the cover body 31 is in clearance fit with that of the inner shell structure 4, the upper end of the cover body 31 is connected with a guide pipe 32, and two ends of the guide pipe 32 are respectively communicated with the feed inlet 2 and the inner side of the cover body 31. The guide pipe 32 is fixed on the vacuum tank 1 through a hoop.

In the invention, the upper end of the flow dividing body 422 is connected with a limiting shaft 424, the upper end of the limiting shaft 424 extends into the flow guide pipe 32 to be in clearance fit with the flow guide pipe 32, the axial rotation of the inner shell structure 4 can be effectively kept, the upper end of the inner shell structure 4 is prevented from deflecting when rotating, and the coating can also flow downwards from the clearance between the limiting shaft 424 and the flow guide pipe 32.

In the invention, the film spreading shell 41, the material flattening table 421, the flow dividing body 422, the limiting shaft 424, the gasket 423, the cover body 31 and the flow guide pipe 32 are all coaxial with the output shaft of the driving motor 5.

When the coating material spreading device is used, the driving motor 5 simultaneously drives the film spreading shell 41, the material leveling platform 421, the flow splitting body 422, the limiting shaft 424 and the gasket 423 to rotate, coating material sequentially passes through the feed inlet 2, the flow guide pipe 32, a gap between the limiting shaft 424 and the flow guide pipe 32 and a gap between the flow splitting body 422 and the cover body 31 to fall on the material leveling platform 421, the coating material is spread on the material leveling platform 421 and is spread into coating layers with the same thickness under the limitation of the gap between the material leveling platform 421 and the cover body 31, the spread coating material flows to the edge of the material leveling platform 421 and falls on the outer wall of the film spreading shell 41 under the action of gravity, the coating material adhered on the outer wall of the film spreading shell 41 is spread to form a continuous film under the centrifugal action until the coating material flows out of a channel and is thrown onto the inner wall of the vacuum tank 1, and finally slowly flows down to the bottom of the vacuum tank to be collected and then flows out of the vacuum tank. Therefore, the invention is suitable for high-viscosity paint, and can quickly degas and has high degassing rate.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A centrifugal vacuum-pumping device comprises a vacuum tank (1), wherein a feed inlet (2) is arranged on the vacuum tank (1); the method is characterized in that: install dustcoat (3) in vacuum tank (1), the below cover of dustcoat (3) is equipped with inner shell structure (4) that the cross-section gradually becomes big from top to bottom, dustcoat (3) and inner shell structure (4) clearance fit and the upper end and feed inlet (2) intercommunication of this dustcoat (3) form and make coating flow to the passageway in vacuum tank (1) through the outer wall of feed inlet (2), dustcoat (3), inner shell structure (4) in proper order, and, inner shell structure (4) are connected with a driving motor (5) and are used for driving inner shell structure (4) rotation and get rid of the coating that flows out the passageway to the inner wall of vacuum tank (1).

2. A centrifugal vacuum pumping apparatus according to claim 1, wherein: inner shell structure (4) including the diameter from top to bottom gradually become big round platform shape stand membrane casing (41), height-adjustable stand material spare (42), install in proper order on the output shaft of driving motor (5) and stand membrane casing (41), stand material spare (42) all with dustcoat (3) clearance fit from bottom to top in stand membrane casing (41), stand material spare (42).

3. A centrifugal vacuum pumping apparatus according to claim 2, wherein: material spreading part (42) comprises an integrally formed platform (421), a conical flow distribution body (422), wherein the flow distribution body (422) is positioned on the top surface of the platform (421), the flow distribution body (422) is in clearance fit with an outer cover (3), at least one gasket (423) is arranged between the platform (421) and a film spreading shell (41), and an output shaft of a driving motor (5) sequentially penetrates through the film spreading shell (41), the gasket (423) and the platform (421) in threaded connection.

4. A centrifugal vacuum pumping apparatus according to claim 3, wherein: the outer cover (3) is including the cover body (31), the cover body (31) cover is located the outside of inner shell structure (4) and the shape looks adaptation of the inboard shape of this cover body (31) and inner shell structure (4) and both clearance fits, and, the upper end of the cover body (31) is connected with honeycomb duct (32), the both ends of honeycomb duct (32) communicate with the inboard of feed inlet (2), the cover body (31) respectively.

5. A centrifugal vacuum pumping apparatus according to claim 4, wherein: the upper end of the flow dividing body (422) is connected with a limiting shaft (424), and the upper end of the limiting shaft (424) extends into the guide pipe (32) to be in clearance fit with the guide pipe (32).

6. A centrifugal vacuum pumping apparatus according to claim 5, wherein: the film spreading shell (41), the material leveling platform (421), the flow dividing body (422), the limiting shaft (424), the gasket (423), the cover body (31) and the guide pipe (32) are all coaxial with an output shaft of the driving motor (5).