CN213855299U - Powder recovery device for powder spraying - Google Patents
Powder recovery device for powder spraying Download PDFInfo
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- CN213855299U CN213855299U CN202022322542.4U CN202022322542U CN213855299U CN 213855299 U CN213855299 U CN 213855299U CN 202022322542 U CN202022322542 U CN 202022322542U CN 213855299 U CN213855299 U CN 213855299U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
A powder recovery device for powder spraying relates to the technical field of powder spraying equipment, and comprises a straight cylinder at the upper end and a conical cylinder at the lower end, wherein a collection bin is arranged at the lower port of the conical cylinder, and the lower end of the collection bin is connected with a recovery pipe; an air inlet pipe is arranged on the side face of the upper end of the straight cylinder, the air inlet pipe is arranged along the tangential direction of the straight cylinder, an air outlet pipe is arranged on the upper end face of the straight cylinder and is concentrically arranged with the straight cylinder, and the lower end of the air outlet pipe extends into the straight cylinder; the inner wall of the straight cylinder is provided with a plurality of primary spiral grooves which are uniformly distributed on the circumference, and the rotating direction of the primary spiral grooves is the same as that of air entering the straight cylinder. This is novel to have better settlement effect.
Description
Technical Field
The utility model relates to a powder spraying equipment technical field, concretely relates to powder recovery unit of powder spraying.
Background
Powder spraying is to spray powder coating on the surface of a workpiece by using powder spraying equipment (an electrostatic plastic spraying machine), and powder can be uniformly adsorbed on the surface of the workpiece under the action of static electricity to form a powdery coating; the powdery coating is baked, leveled and cured at high temperature to become a final coating; the spraying effect of the powder spraying is superior to that of a paint spraying process in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance and the like, and the cost is also lower than that of the paint spraying with the same effect. When the powder spraying chamber is used for spraying, a large amount of powder can not be adsorbed on the surface of a workpiece but is scattered in the air, in order to recycle the scattered powder, a negative pressure fan is arranged in the powder spraying chamber, the air mixed with the powder is absorbed into a recovery device for precipitation, the precipitated powder is collected and then mixed with new powder in a certain proportion for reuse, the existing recovery device enables the air to generate vortex rotation, the powder is downwards and sequentially precipitated under the action of centrifugal force, the recovery purpose is achieved, but the powder has small and light diameter, so that a part of the powder can be re-lifted after touching the inner wall, the separation process is not thorough, the powder flies at an outlet due to overlarge flow and undersize, and the precipitation effect of the powder is not good.
Disclosure of Invention
In order to solve the problems of the prior art, the utility model provides a powder recovery device of powder spraying has better settlement effect.
The purpose of the utility model can be realized by the following technical proposal: a powder recovery device for powder spraying comprises a straight barrel at the upper end and a conical barrel at the lower end, wherein a collection bin is mounted at the lower port of the conical barrel, and the lower end of the collection bin is connected with a recovery pipe; an air inlet pipe is arranged on the side face of the upper end of the straight cylinder, the air inlet pipe is arranged along the tangential direction of the straight cylinder, an air outlet pipe is arranged on the upper end face of the straight cylinder and is concentrically arranged with the straight cylinder, and the lower end of the air outlet pipe extends into the straight cylinder; the inner wall of the straight cylinder is provided with a plurality of primary spiral grooves which are uniformly distributed on the circumference, and the rotating direction of the primary spiral grooves is the same as that of air entering the straight cylinder.
Preferably, the pitch of the primary spiral groove is greater than the height of the straight cylinder.
Preferably, a plurality of straight grooves are arranged on the inner wall of the conical cylinder, and the straight grooves are parallel to the generatrix direction of the conical cylinder and are uniformly distributed on the circumference; the upper end of the straight groove is communicated with the lower end of the first-stage spiral groove in sequence.
Preferably, a transition groove is arranged between the first-stage spiral groove and the straight groove, the transition groove is installed at the upper part of the conical cylinder, the upper end of the transition groove is connected along the tangential direction of the lower end of the first-stage spiral groove, the transition groove is communicated with the upper end of the straight groove after downward arc transition, and the lower end of the transition groove is connected along the length direction of the straight groove.
Preferably, the inner diameter of the air outlet pipe is 2 times of the inner diameter of the straight cylinder, and the depth of the air outlet pipe extending into the air cylinder is 1/8 of the inner diameter of the straight cylinder.
Preferably, a plurality of secondary spiral grooves with equal circumference are arranged in the air outlet pipe, and the vertical length of the secondary spiral grooves is smaller than the thread pitch of the secondary spiral grooves.
Preferably, the upper end of the secondary spiral groove is located below the upper end face of the straight cylinder.
The utility model discloses an application principle: in the process of spraying workpieces in the powder spraying chamber, a large amount of generated powder air is sucked away by a negative pressure fan above the powder spraying chamber and is conveyed into a recovery device from the upper part of the powder spraying chamber through an air inlet pipe, the air containing powder is blown in from the upper end of a straight cylinder along the tangential direction and generates rotary motion in the straight cylinder, the powder is thrown onto the wall of the straight cylinder under the action of centrifugal force, and is downwards settled to the bottom of a conical cylinder and finally falls into a collection bin, the air containing trace powder is discharged from an air outlet pipe at the upper end of the straight cylinder, and the air is directly discharged into the atmosphere after being filtered by a filtering device; the primary spiral groove in the straight cylinder has the function that powder can be quickly gathered in the primary spiral groove after being thrown onto the wall of the straight cylinder, so that the side effect of rotary airflow on sedimentation is reduced, and the sedimentation speed in the straight cylinder is accelerated; the rotating airflow is mainly concentrated on the straight cylinder section, so that the straight groove is formed in the conical cylinder to enable powder settled in the conical cylinder to quickly slide to the bottom of the conical cylinder under the action of gravity, and caking and bonding in the straight groove are avoided; the arrangement of the transition groove avoids the hard transition from the primary spiral groove to the straight groove, so that the whole groove is smooth and streamline; because the diameter of the air outlet pipe is smaller than that of the straight cylinder, on the premise that the air quantity is constant, the air speed in the air outlet pipe is larger than that in the straight cylinder, the centrifugal force is enhanced, and the secondary spiral groove is arranged for further performing final filtration on powder mixed in the air, so that the sedimentation efficiency of the powder is improved.
The utility model discloses the combined effect who brings includes: the utility model has the advantages of simple and reasonable structure, convenient to use sets up vertical groove in a straight section of thick bamboo and a awl section of thick bamboo, makes to get rid of the powder on the inner wall and subsides with higher speed, and the powder separation effect is better.
Drawings
Fig. 1 is a schematic view of an installation structure of a powder recycling device for powder spraying according to an embodiment of the present invention.
Fig. 2 is a schematic top view of a powder recycling device for powder spraying according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of the internal structure of the powder recycling device for powder spraying according to the embodiment of the present invention.
Fig. 4 is a schematic size structure diagram of a powder recycling device for powder spraying according to an embodiment of the present invention.
Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.
Detailed Description
The invention is further described with reference to the following figures and examples.
Examples
The embodiment of the utility model provides a cross following technical scheme and realize: a powder recovery device for powder spraying comprises a straight barrel 1 at the upper end and a conical barrel 2 at the lower end, wherein a collection bin 3 is installed at the lower port of the conical barrel 2, and the lower end of the collection bin 3 is connected with a recovery pipe 4; an air inlet pipe 5 is arranged on the side face of the upper end of the straight cylinder 1, the air inlet pipe 5 is arranged along the tangential direction of the straight cylinder 1, an air outlet pipe 6 is arranged on the upper end face of the straight cylinder 1 and is concentrically arranged with the straight cylinder 1, and the lower end of the air outlet pipe 6 extends into the straight cylinder 1; a plurality of primary spiral grooves 7 which are uniformly distributed on the circumference are arranged on the inner wall of the straight cylinder 1, and the rotating direction of the primary spiral grooves 7 is the same as that of air entering the straight cylinder 1; the pitch of the primary spiral groove 7 is larger than the height of the straight cylinder 1.
Further, in this embodiment, a plurality of straight grooves 8 are arranged on the inner wall of the conical cylinder 2, and the straight grooves 8 are parallel to the generatrix direction of the conical cylinder 2 and are circumferentially and uniformly distributed; the upper end of the straight groove 8 is communicated with the lower end of the primary spiral groove 7 in sequence. A transition groove 9 is arranged between the primary spiral groove 7 and the straight groove 8, the transition groove 9 is installed at the upper part of the conical barrel 2, the upper end of the transition groove 9 is connected along the tangential direction of the lower end of the primary spiral groove 7, the transition groove 9 is communicated with the upper end of the straight groove 8 after being transited to a downward arc, and the lower end of the transition groove 9 is connected along the length direction of the straight groove 8.
Further, in this embodiment, the inner diameter of the air outlet pipe 6 is 2 times of the inner diameter of the straight cylinder 1, and the depth of the air outlet pipe 6 extending into the air cylinder is 1/8 of the inner diameter of the straight cylinder 1, as shown in the figure
Further, in this embodiment, a plurality of secondary spiral grooves 10 with uniform circumferential portions are arranged in the air outlet pipe 6, and the vertical length of the secondary spiral grooves 10 is smaller than the pitch of the secondary spiral grooves 10; the upper end of the secondary spiral groove 10 is positioned below the upper end surface of the straight cylinder 1.
The utility model discloses use principle: in the process of spraying workpieces in the powder spraying chamber 11, a large amount of generated powder air is sucked away by a negative pressure fan 12 above the powder spraying chamber 11 and is conveyed into a recovery device from the upper part of the powder spraying chamber 11 through an air inlet pipe 5, the air containing powder is blown in from the upper end of the straight cylinder 1 along the tangential direction and generates rotary motion in the straight cylinder 1, the powder is thrown onto the wall of the straight cylinder 1 under the action of centrifugal force and is downwards settled to the bottom of the conical cylinder 2 and finally falls into the collection bin 3, the air containing trace powder is discharged from an air outlet pipe 6 at the upper end of the straight cylinder 1, and the air is directly discharged into the atmosphere after being filtered by a filtering device 13; the primary spiral groove 7 in the straight cylinder 1 has the function of enabling powder to be rapidly gathered in the primary spiral groove 7 after being thrown onto the wall of the straight cylinder 1, reducing the side effect of rotary airflow on sedimentation and accelerating the sedimentation speed in the straight cylinder 1; the rotating airflow is mainly concentrated on the section of the straight cylinder 1, so that the straight groove 8 is arranged in the conical cylinder 2 to ensure that the powder settled in the conical cylinder 2 can quickly slide to the bottom of the conical cylinder 2 under the action of gravity, and the caking and bonding in the straight groove 8 are avoided; the arrangement of the transition groove 9 avoids the hard transition from the primary spiral groove 7 to the straight groove 8, so that the whole groove is smooth and streamline; because the diameter of the air outlet pipe 6 is smaller than that of the straight cylinder 1, the air speed in the air outlet pipe 6 is larger than that in the straight cylinder 1 on the premise of constant air quantity, the centrifugal force is enhanced at the position, and the secondary spiral groove 10 is arranged for further performing final filtration on powder mixed in the air, so that the sedimentation efficiency of the powder is improved.
The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The present invention has been described above with reference to the preferred embodiments, but the scope of protection of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.
Claims (7)
1. The powder recovery device for powder spraying is characterized in that a straight cylinder at the upper end and a conical cylinder at the lower end are arranged, a collection bin is arranged at the lower port of the conical cylinder, and the lower end of the collection bin is connected with a recovery pipe; an air inlet pipe is arranged on the side face of the upper end of the straight cylinder, the air inlet pipe is arranged along the tangential direction of the straight cylinder, an air outlet pipe is arranged on the upper end face of the straight cylinder and is concentrically arranged with the straight cylinder, and the lower end of the air outlet pipe extends into the straight cylinder; the inner wall of the straight cylinder is provided with a plurality of primary spiral grooves which are uniformly distributed on the circumference, and the rotating direction of the primary spiral grooves is the same as that of air entering the straight cylinder.
2. The powder recovery device of claim 1, wherein the pitch of the primary helical groove is greater than the height of the straight barrel.
3. The powder recovery device for powder spraying according to claim 2, wherein a plurality of straight grooves are arranged on the inner wall of the conical cylinder, and the straight grooves are parallel to the generatrix direction of the conical cylinder and are uniformly distributed on the circumference; the upper end of the straight groove is communicated with the lower end of the first-stage spiral groove in sequence.
4. The powder recovery device for powder spraying according to claim 3, wherein a transition groove is arranged between the primary spiral groove and the straight groove, the transition groove is installed at the upper part of the cone, the upper end of the transition groove is connected along the tangential direction of the lower end of the primary spiral groove, the transition groove is communicated with the upper end of the straight groove after being transited to a downward arc, and the lower end of the transition groove is connected along the length direction of the straight groove.
5. The powder recovery device for powder coating according to claim 1 or 4, wherein the inner diameter of the air outlet pipe is 2 times of the inner diameter of the straight cylinder, and the depth of the air outlet pipe extending into the straight cylinder is 1/8 times of the inner diameter of the straight cylinder.
6. The powder recovery device for powder coating of claim 1, wherein a plurality of secondary spiral grooves with equal circumferential portions are arranged in the air outlet pipe, and the vertical length of the secondary spiral grooves is smaller than the thread pitch of the secondary spiral grooves.
7. The powder recovery device for powder coating of claim 6, wherein the upper end of the secondary helical groove is located below the upper end surface of the straight cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022322542.4U CN213855299U (en) | 2020-10-19 | 2020-10-19 | Powder recovery device for powder spraying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022322542.4U CN213855299U (en) | 2020-10-19 | 2020-10-19 | Powder recovery device for powder spraying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213855299U true CN213855299U (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022322542.4U Active CN213855299U (en) | 2020-10-19 | 2020-10-19 | Powder recovery device for powder spraying |
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| CN (1) | CN213855299U (en) |
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- 2020-10-19 CN CN202022322542.4U patent/CN213855299U/en active Active
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