CN220160263U - Static powder rotary cup spray gun device with brushless external static discharge ring - Google Patents
Static powder rotary cup spray gun device with brushless external static discharge ring Download PDFInfo
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- CN220160263U CN220160263U CN202321431375.4U CN202321431375U CN220160263U CN 220160263 U CN220160263 U CN 220160263U CN 202321431375 U CN202321431375 U CN 202321431375U CN 220160263 U CN220160263 U CN 220160263U
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- powder
- electrostatic
- spray gun
- static
- discharge ring
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- 239000000843 powder Substances 0.000 title claims abstract description 83
- 230000003068 static effect Effects 0.000 title claims abstract description 66
- 239000007921 spray Substances 0.000 title claims abstract description 28
- 229940098458 powder spray Drugs 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 13
- 230000005514 two-phase flow Effects 0.000 claims description 13
- 239000004020 conductor Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052799 carbon Inorganic materials 0.000 abstract description 18
- 239000002184 metal Substances 0.000 abstract description 10
- 238000005507 spraying Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000005686 electrostatic field Effects 0.000 description 3
- 238000007590 electrostatic spraying Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Electrostatic Spraying Apparatus (AREA)
Abstract
The utility model relates to a static powder rotary cup spray gun device with a brushless external static discharge ring, which comprises a static powder spray gun main body, a nonmetallic insulating rotary spreader component, a static discharge ring, a driving unit for driving the rotary spreader component to rotate, and a high-voltage static generation unit for providing high-voltage static for the static discharge ring. Firstly, the design of the metal parts of the rotary spreader component is canceled, the capacitance effect of the metal parts in the rotary spreader component is greatly reduced, the sparking phenomenon generated in the spraying process of the traditional metal rotary spreader component is avoided, and the safety is improved. The carbon brush can be prevented from being mixed into powder in the rotating friction process to pollute the powder, and meanwhile, the cost of frequent replacement and maintenance of the carbon brush can be reduced, so that the use cost of the spray gun can be reduced.
Description
Technical Field
The utility model relates to the technical field of electrostatic spraying, in particular to a brushless external electrostatic discharge ring electrostatic powder rotary cup spray gun device.
Background
Electrostatic spraying is a common surface coating technique that forms a uniform coating by charging a powder, then spraying the charged powder onto the surface of a coated object, and adsorbing the powder onto the surface of the coated object by electrostatic action. The rotary cup spray gun is used as one of electrostatic spraying technologies, mainly adopts a rotary spreader component C and a carbon brush F, a high-voltage electrostatic generator D generates high-voltage static electricity, and the high-voltage static electricity is transmitted to a static electricity release disc E at the head part of the rotary spreader component C through sliding contact of the carbon brush F, so that powder charging and ejection after charging are realized.
However, this structure has the following two problems:
1. the carbon brush F is worn and falls off slag, so that the carbon brush F is mixed into powder, the spraying quality is affected, and the maintenance and replacement cost of the carbon brush is reduced;
2. the rotating central shaft of the rotating diffuser component C is a metal piece, a stronger capacitance effect is generated inside the spray gun, a sparking phenomenon is easy to generate in the spraying process, and potential safety hazards exist.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a brushless external static discharge ring static powder rotary cup spray gun device, which comprises a static powder spray gun main body, a nonmetallic insulating rotary spreader component, a static discharge ring, a driving unit for driving the rotary spreader component to rotate, and a high-voltage static generation unit for providing high-voltage static for the static discharge ring;
the high-voltage electrostatic generation unit is embedded in the electrostatic powder spray gun main body, the inside of the electrostatic powder spray gun main body is fixedly embedded with the diffuser installation seat, the rotary diffuser assembly is coaxially arranged in the diffuser installation seat in a rotating way, the electrostatic discharge ring is fixed at the front end of the electrostatic powder spray gun main body and coaxially arranged with the rotary diffuser assembly, the high-voltage electrostatic generation unit is connected with the electrostatic discharge ring through the conductive unit in a conducting way, the inside center of the electrostatic powder spray gun main body is a medium-through powder tube, the inside of the powder tube is a powder channel, and the peripheral edge of the front end of the electrostatic discharge ring forms an electrostatic discharge sharp edge.
In an alternative embodiment, a shaping air channel capable of throwing out a powder-air mixed gas-solid two-phase flow powder particle cloud is constructed within the rotating spreader assembly and between the static discharge ring.
In an alternative embodiment, the shaping air channel is abutted against the outer edge of the static electricity discharge ring to act on the path of the powder ejected from the front edge of the rotary spreader assembly to change the shape of the powder atomization ejection region so as to control the gas-solid two-phase flow powder particle cloud diffusion region.
In an alternative embodiment, the drive unit is a rotary pneumatic turbine built into the electrostatic powder spray gun body that drives the rotary spreader assembly in rotation.
In an alternative embodiment, the drive unit is a high speed motor that drives the rotation of the rotary spreader assembly.
In an alternative embodiment, the high voltage electrostatic generating unit is a high voltage electrostatic generator built in the electrostatic powder spray gun body, and the high voltage electrostatic generator is connected to the electrostatic discharge ring through conductive material.
In an alternative embodiment, the high voltage electrostatic generating unit is a high voltage cable embedded in the electrostatic discharge ring, and the high voltage cable is connected to an external high voltage electrostatic generator.
In an alternative embodiment, the electrostatic powder rotary cup spray gun device with the brushless electrostatic discharge ring further comprises a locking cap, the locking cap is locked at the front end of the electrostatic powder spray gun main body, the electrostatic discharge ring is flush with or protrudes out of the outer end face of the locking cap, and the locking cap is a nonmetallic piece.
Compared with the prior art, the utility model has the beneficial effects that:
in one aspect, the carbon brush in the traditional spray gun is directly canceled, a high-voltage electrostatic transmission mode of friction conduction by the carbon brush is abandoned, carbon slag generated in the process of rotation friction of the carbon brush can be prevented from being mixed into powder to pollute the powder, and meanwhile, the cost of frequent replacement and maintenance of the carbon brush can be reduced, so that the use cost of the spray gun can be reduced.
In another aspect, the driving unit is a high-speed motor or a rotary pneumatic turbine, the rotary spreader component is driven to rotate at a high speed, the rotary spreader component simultaneously generates centrifugal force and internal air flow to throw out gas-solid two-phase flow powder particle cloud formed by mixing partial powder of the powder channel and air from the front end periphery of the spreader, the high-voltage static electricity generating unit is a built-in high-voltage static electricity generator or an embedded high-voltage cable connected with an external high-voltage static electricity generator, the generated high-voltage static electricity is transmitted to the static electricity releasing ring through a conductive material, the powder sprayed by the powder channel and the gas-solid two-phase flow powder particle cloud are captured by charged particles generated by corona discharge at the electrostatic discharge sharp edge, are charged and are sprayed outwards along with the air flow, and the charged powder particle cloud flies to the surface of a workpiece to be sprayed at zero potential under the action of an electrostatic field and is adsorbed on the surface of the workpiece for spraying; the rotary spreader component is made of nonmetallic insulating material, so that the capacitance effect of the metal component in the rotary spreader component is greatly reduced, the sparking phenomenon generated in the spraying process of the traditional metal rotary spreader component is avoided, and the safety is improved.
In another aspect, a forming air channel capable of throwing out powder and air mixed gas-solid two-phase flow powder particle cloud is constructed between the inside of the rotary diffuser assembly and the static discharge ring, and the forming air channel is in butt joint with the outer edge of the static discharge ring and is used for acting on the front end peripheral edge of the rotary diffuser assembly to spray out powder to change the shape of a powder atomization spraying area so as to control the gas-solid two-phase flow powder particle cloud diffusion area.
The utility model is described in further detail below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of a static powder rotary cup spray gun device with a brushless external static discharge ring according to the present utility model;
FIG. 2 is a front view of a static powder rotary cup spray gun device with a brushless external static discharge ring according to the present utility model;
FIG. 3 is a schematic cross-sectional view taken along the direction B in FIG. 2 in accordance with the present utility model;
fig. 4 is a schematic cross-sectional view of a prior art powder screw cup spray gun apparatus.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-3, the present utility model provides a static powder rotary cup spray gun device with a brushless external static discharge ring, which comprises a static powder spray gun main body 1, a nonmetallic insulation rotary spreader component 2, a static discharge ring 11, a driving unit 5 for driving the rotary spreader component 2 to rotate, and a high-voltage static generation unit 6 for providing high-voltage static for the static discharge ring 11.
As shown in fig. 4, the rotating center shaft of the rotating distributor assembly C inside the conventional cup-shaped spray gun is a metal piece, the high-voltage static generator D conducts high-voltage static electricity to the rotating center shaft of the rotating distributor assembly C through the carbon brush F, the rotating center shaft of the rotating distributor assembly C conducts static electricity to the sharp edge of the rotating static electricity release disc E at the end, and a strong capacitance effect is generated inside the rotating center shaft of the metal rotating distributor assembly C.
In this regard, the rotary spreader assembly 2 of the present embodiment is designed as a nonmetallic insulator, which advantageously reduces the effects of this capacitive effect problem.
Therefore, the rotary spreader component 2 is made of nonmetallic insulating materials, so that the capacitance effect of the metal components in the rotary spreader component 2 is greatly reduced, the sparking phenomenon generated in the spraying process of the rotary central shaft of the rotary spreader component C made of traditional metal materials is avoided, and the safety is improved.
In addition, the inside carbon brush of traditional spray gun is directly cancelled, and the high-voltage electrostatic transmission mode that adopts carbon brush friction to lead is abandoned, thereby both can prevent that the carbon brush from producing carbon slag and mixing to the powder in the middle of rotating friction process and pollute the powder, also can reduce the frequent cost of changing the maintenance of carbon brush simultaneously to this use cost that can reduce the spray gun.
In this embodiment, as shown in fig. 2, the high-voltage electrostatic generating unit 6 is embedded in the electrostatic powder spray gun body 1, the electrostatic powder spray gun body 1 is embedded with a fixed diffuser mounting seat 10, the rotary diffuser assembly 2 is coaxially and rotatably mounted in the diffuser mounting seat 10, and on one side near the front end in the electrostatic powder spray gun body 1, the inner center of the electrostatic powder spray gun body 1 is provided with a powder pipe 12 which is arranged in a through manner, a powder channel 12A is formed in the center of the powder pipe 12, and on the other end of the electrostatic powder spray gun body 1 is provided with air flow input interfaces and powder input interfaces, and powder enters the powder channel 12A and moves along with air flow.
Illustratively, as shown in fig. 1, an electrostatic discharge ring 11 is fixed to the front end of the electrostatic powder spray gun body 1.
More preferably, as shown in fig. 1, the electrostatic discharge tip 11A is formed on the front edge of the electrostatic discharge ring 11, and it should be noted that in this embodiment, the electrostatic discharge ring 11 is a fixed non-rotating member, and the electrostatic discharge tip 11A is made of metal and carbon fiber.
As shown in fig. 3, the high-voltage electrostatic generating unit 6 is connected with the electrostatic discharge ring 11 through a conductive unit, the powder channel 12A is communicated with the front end periphery of the electrostatic discharge ring 11, and the corona discharge region 8 for charging the powder is formed by jointly constructing the outer periphery of the electrostatic discharge ring 11 in the circumferential direction relative to the workpiece 7 to be sprayed in the grounding state.
As shown in fig. 3, the electrostatic discharge sharp edge 11A of the outer edge of the electrostatic discharge ring 11 is charged with high-voltage electrostatic charges, and the powder ejected from the outer edge of the front end of the powder channel 12A of the self-rotating spreader component 2 is captured by charged air particles generated by corona discharge and charged;
in addition, the air flow is blown out to form a spraying area with a cambered surface shape, a corona discharge area 8 is formed, and powder particle clouds fly to zero potential under the action of an electrostatic field to be sprayed on the surface of the workpiece 7 to be sprayed, so that a spraying layer is formed.
In the present embodiment, a molded air passage 2A capable of throwing out a powder particle cloud of a gas-solid two-phase flow in which powder is mixed with air is further constructed between the inside of the rotary spreader assembly 2 and the electrostatic discharge ring 11.
In this aspect, as shown in fig. 3, a forming air channel 2A capable of throwing out a powder particle cloud of a gas-solid two-phase flow mixed with air is constructed between the inside of the rotary spreader assembly 2 and the electrostatic discharge ring 11, and the forming air channel 2A is abutted against the outer edge of the electrostatic discharge sharp edge 11A for changing the powder atomizing shape of the corona discharge zone 8 in cooperation with the path control action of ejecting the powder from the front end peripheral edge of the rotary spreader assembly 2 so as to be able to control the powder ejection area of the corona discharge zone 8.
It will be appreciated that in this embodiment, the driving unit 5 is a rotary pneumatic turbine or a high-speed motor built into the electrostatic powder spray gun body 1 to drive the rotary spreader assembly 2 to rotate, and it is generally required that the rotational speed of the drive is kept between 100 and 30000 rpm, so that the rotary spreader assembly 2 achieves sufficient centrifugal force, and the powder particle cloud is ejected more quickly and can adhere better to the surface of the workpiece 7 to be sprayed.
Specifically, the driving unit 5 may be a high-speed motor or a rotary pneumatic turbine, and drives the rotary spreader assembly 2 to rotate at a high speed.
The high voltage electrostatic generating unit 6 is, for example, a high voltage electrostatic generator built in the electrostatic powder spray gun body 1, which is connected to the electrostatic discharge ring 11 by conductive material conduction, or an embedded high voltage cable, which is connected to an external high voltage electrostatic generator.
As shown in fig. 3, the rotary spreader assembly 2 simultaneously generates centrifugal force and internal air flow to mix part of powder of the powder channel 12A with air to form a gas-solid two-phase flow powder particle cloud, the gas-solid two-phase flow powder particle cloud is thrown out from the outer edge of the front end of the rotary spreader assembly 2, the high-voltage static electricity generating unit 6 can be selected as a built-in high-voltage static electricity generator or a high-voltage static electricity generator connected with the outside by a high-voltage cable, the generated high-voltage static electricity is transmitted to the static electricity releasing ring 11 through a conductive material, the powder sprayed out by the powder channel 12A and the gas-solid two-phase flow powder particle cloud are captured at the static electricity discharging sharp edge 11A by charged particles generated by corona discharge and are dispersed after being sprayed outwards along with the air flow, and the charged powder particle cloud flies to the surface of a workpiece 7 to be sprayed under the action of electrostatic field and is adsorbed on the surface of the workpiece 7 to be sprayed.
In addition, as shown in fig. 3, the electrostatic powder rotary cup spray gun device with the brushless electrostatic discharge ring 11 further comprises a locking cap 9, the locking cap 9 is locked at the front end of the electrostatic powder spray gun main body 1, the electrostatic discharge sharp edge 11A is flush with or protrudes out of the outer end surface of the locking cap 9, and the locking cap 9 is a nonmetallic piece.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.
Claims (8)
1. The static powder rotary cup spray gun device with the brushless external static discharge ring is characterized by comprising a static powder spray gun main body, a nonmetallic insulating rotary spreader component, a static discharge ring, a driving unit for driving the rotary spreader component to rotate, and a high-voltage static generation unit for providing high-voltage static for the static discharge ring;
the high-voltage electrostatic generation unit is embedded in the electrostatic powder spray gun main body, the inside of the electrostatic powder spray gun main body is fixedly embedded with the diffuser installation seat, the rotary diffuser assembly is coaxially arranged in the diffuser installation seat in a rotating way, the electrostatic discharge ring is fixed at the front end of the electrostatic powder spray gun main body and coaxially arranged with the rotary diffuser assembly, the high-voltage electrostatic generation unit is connected with the electrostatic discharge ring through the conductive unit in a conducting way, the inside center of the electrostatic powder spray gun main body is a medium-through powder tube, the inside of the powder tube is a powder channel, and the peripheral edge of the front end of the electrostatic discharge ring forms an electrostatic discharge sharp edge.
2. A brushless external static discharge ring static powder cup spray gun apparatus according to claim 1, wherein a shaping air channel capable of throwing out powder and air mixed gas-solid two-phase flow powder particle cloud is constructed between the rotating spreader assembly and the static discharge ring.
3. A brushless outboard electrostatic discharge ring electrostatic powder cup spray gun apparatus as defined in claim 2, wherein said shaping air channel is abutted against an outboard of said electrostatic discharge ring for acting on a path of powder discharge from a front peripheral edge of said rotary spreader assembly to change a shape of a powder atomizing discharge area to enable control of a gas-solid two-phase flow powder particle cloud diffusion area.
4. A brushless external electrostatic discharge ring electrostatic powder rotary cup spray gun apparatus as defined in claim 1, wherein said drive unit is a rotary pneumatic turbine built into said electrostatic powder spray gun body for driving said rotary spreader assembly in rotation.
5. The static electricity powder rotary cup spray gun device of claim 1 wherein said drive unit is a high speed motor for driving said rotary spreader assembly in rotation.
6. The electrostatic powder rotary cup spray gun apparatus of claim 1, wherein the high voltage electrostatic generator is a high voltage electrostatic generator built in the electrostatic powder spray gun main body, and the high voltage electrostatic generator is connected with the electrostatic discharge ring through conductive material.
7. The electrostatic powder rotary cup spray gun apparatus of claim 1, wherein the high voltage electrostatic generating unit is a high voltage cable embedded in and connected with the electrostatic discharge ring, and the high voltage cable is connected with an external high voltage electrostatic generator.
8. A brushless external static discharge ring static powder cup spray gun apparatus according to any one of claims 2-7, further comprising a locking cap locked to the front end of the static powder spray gun main body, wherein the static discharge ring is flush with or protrudes from the outer end surface of the locking cap, and the locking cap is a nonmetallic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321431375.4U CN220160263U (en) | 2023-06-06 | 2023-06-06 | Static powder rotary cup spray gun device with brushless external static discharge ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321431375.4U CN220160263U (en) | 2023-06-06 | 2023-06-06 | Static powder rotary cup spray gun device with brushless external static discharge ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220160263U true CN220160263U (en) | 2023-12-12 |
Family
ID=89066388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321431375.4U Active CN220160263U (en) | 2023-06-06 | 2023-06-06 | Static powder rotary cup spray gun device with brushless external static discharge ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220160263U (en) |
-
2023
- 2023-06-06 CN CN202321431375.4U patent/CN220160263U/en active Active
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