CN111729765A - Vertical plate belt powder spraying device capable of improving electrostatic powder adsorption capacity - Google Patents
Vertical plate belt powder spraying device capable of improving electrostatic powder adsorption capacity Download PDFInfo
- Publication number
- CN111729765A CN111729765A CN202010691217.7A CN202010691217A CN111729765A CN 111729765 A CN111729765 A CN 111729765A CN 202010691217 A CN202010691217 A CN 202010691217A CN 111729765 A CN111729765 A CN 111729765A
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- powder
- spraying
- strip
- plate
- discharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/10—Arrangements for supplying power, e.g. charging power
Abstract
The invention provides a vertical plate strip powder spraying device capable of improving electrostatic adsorption capacity of powder, which comprises a spraying mechanism and a discharging mechanism, wherein the spraying mechanism comprises a plurality of spray gun groups arranged at intervals along the length direction of a plate strip, each spray gun group comprises a plurality of spray guns arranged at intervals along the width direction of the plate strip, spray nozzles of the spray guns face the surface to be sprayed of the plate strip, the discharging mechanism is arranged below the spraying mechanism in the length direction of the plate strip, the discharging mechanism comprises a plurality of discharging ends arranged at intervals along the width direction of the plate strip, and the discharging ends face the surface to be sprayed. The discharging mechanism is arranged below the spraying mechanism along the length direction of the plate strip, and the electrostatic field generated by discharging of the discharging mechanism enables powder which is sprayed by a spray gun of the spraying mechanism and has no or less charges to be charged again when the powder falls down and passes through the electrostatic field, so that the electrostatic adsorption capacity between the powder and the plate strip is improved, the powder carrying rate of the plate is improved, and the powder waste and the pollution to the environment caused by powder overflowing a spraying room are reduced.
Description
Technical Field
The invention relates to the technical field of electrostatic powder spraying of plate strips, in particular to a vertical plate strip powder spraying device capable of improving electrostatic powder adsorption capacity.
Background
The electrostatic powder spraying is that a spray gun is utilized, and polyester powder is blown out from the spray gun to the surface of an interrupted workpiece by compressed air at a certain distance and is scattered by the compressed air to form atomized powder; and simultaneously, a spray gun nozzle is utilized to generate high electrostatic voltage, a high-voltage corona discharge electric field is formed between the electrostatic voltage and the surfaces of the plate and the coil, so that dense charges are generated around the electrostatic voltage, and the powder is charged when being blown to the surface of a workpiece by the spray gun. In addition, the workpiece is simultaneously grounded. The charged powder is blown by the compressed air flow and is uniformly adsorbed on the surface of the workpiece under the action of electrostatic attraction.
Electrostatic powder coating of sheet and strip is generally carried out in a spray booth. In the existing spraying mode, powder electrostatic spraying is carried out on the surface of a plate strip with a certain width in a row through one or more rows of spray guns. The electrostatic spraying of the intermittent or continuous plate strip generally has two modes of horizontal spraying and vertical spraying. The vertical spraying is that the plate strip runs in a vertical state, enters and exits the spraying room in the vertical direction, and the spray gun horizontally blows powder to the surface of one side of the plate strip for spraying.
In the electrostatic powder coating operation of the sheet, when powder is blown to the surface of the sheet by compressed air through a high-voltage electrostatic field, most of the powder is adsorbed to the surface of the sheet, but some of the powder is not adsorbed. The two main reasons are that part of powder falls on the surface of the plate strip and is blown off the surface of the plate strip by compressed air due to the disturbance of the compressed air; on the other hand, the powder loses charges after no charges are attached or the charges are attached in the compressed air blowing process, and the powder is disturbed and blown away by the compressed air due to poor attachment or binding capacity with the plate strip; therefore, in the process of attaching the powder to the surface of the plate strip in the electrostatic powder spraying operation, part of the powder is blown away and wasted.
In addition, for the vertical spraying, besides the situation of powder waste, in the process of powder electrostatic spraying operation, under the influence of gravity, a part of powder falls off in the vertical direction under the influence of gravity before reaching the surface of the plate strip, and another part of powder falls off from the surface of the plate strip in the vertical direction after reaching the surface of the plate strip, so that the powder coating rate of the vertical spraying is 60-80%. The bottom of the spraying room is provided with a plate belt inlet or a plate belt outlet, so that the powder falling along the vertical direction can overflow from the opening at the bottom of the spraying room, and further powder waste and environmental pollution are caused.
Therefore, how to improve the powder deposition rate and reduce the influence of powder overflowing from the spray room on the environment is an urgent problem to be solved in vertical spraying.
Disclosure of Invention
The invention aims to provide a vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of powder, which improves the powder coating rate of the powder by improving the electrostatic adsorption capacity of the powder, and achieves the purposes of reducing the waste of the powder and reducing the environment influence caused by the overflow of the powder from a spraying room.
In order to achieve the above purpose, the invention provides a vertical plate and strip powder spraying device capable of improving powder electrostatic adsorption capacity, wherein the vertical plate and strip powder spraying device capable of improving powder electrostatic adsorption capacity comprises a spraying mechanism and a discharging mechanism, the spraying mechanism comprises a plurality of groups of spray gun groups arranged at intervals along the length direction of a plate strip, each group of spray gun group comprises a plurality of spray guns arranged at intervals along the width direction of the plate strip, a nozzle of each spray gun faces the surface to be sprayed of the plate strip, the discharging mechanism is arranged below the spraying mechanism in the length direction of the plate strip, the discharging mechanism comprises a plurality of discharging ends arranged at intervals along the width direction of the plate strip, and each discharging end faces the surface to be sprayed.
The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that the discharging mechanism comprises a plurality of discharging elements arranged at intervals in the width direction of the plate strip, and each discharging element is provided with the discharging end.
The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that the discharge element is a discharge spray gun, and the discharge end of the discharge spray gun is a discharge needle or an annular discharge nozzle.
The vertical type plate strip powder spraying device capable of improving the electrostatic powder adsorption capacity is characterized in that the distance between the discharging mechanism and the spraying mechanism in the width direction of the plate strip is 100-1000 mm.
The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that the distance between each discharge end and the surface to be sprayed is 100-500 mm.
The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that the discharging mechanisms are provided with a plurality of groups, and the discharging mechanisms are arranged below the spraying mechanisms in the length direction of the plate strip and between every two adjacent groups of the spraying gun groups of the spraying mechanisms.
The vertical plate and strip powder spraying device capable of improving the powder electrostatic adsorption capacity further comprises a spraying room, a first opening for the plate and strip to pass through is formed in the top of the spraying room, a second opening for the plate and strip to pass through is formed in the bottom of the spraying room, the spraying mechanism and the discharging mechanism are arranged inside the spraying room, and in a state that the plate and strip passes through the spraying room, the spraying mechanism and the discharging mechanism are located on the same side of the plate and strip.
The vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that an included angle of 0-30 degrees is formed between a central connecting line of the first opening and the second opening and a vertical plane.
The vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of the powder is characterized in that the bottom, the top or the side wall of the spraying room is communicated with a negative pressure suction assembly.
The vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of the powder comprises a negative pressure suction assembly, a negative pressure suction assembly and a suction pipe, wherein the spraying room is provided with a suction port, the guide hopper is provided with an inlet and an outlet, the suction port is communicated with the inlet of the guide hopper, the guide hopper is gradually reduced from the inlet to the outlet, the outlet of the guide hopper is a suction gap, and the suction gap is communicated with the suction pipe.
Compared with the prior art, the invention has the following advantages:
according to the vertical type plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder, the discharging mechanism is arranged below the spraying mechanism along the length direction of the plate strip, and the electrostatic field generated by discharging of the discharging mechanism enables the powder which is sprayed out by a spray gun of the spraying mechanism and has no or less charges to be charged again when the powder falls down and passes through the electrostatic field, so that the electrostatic adsorption capacity between the powder and the plate strip is improved, the powder coating rate of the powder on the plate strip is greatly improved, and the waste of the powder and the pollution of the powder overflowing a spraying room to the environment are reduced.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic perspective view of a vertical plate-strip powder spraying device capable of improving electrostatic powder adsorption capacity according to the present invention;
fig. 2 is a schematic view of the structure in the direction a in fig. 1.
The reference numbers illustrate:
1. a spraying mechanism;
11. a spray gun group;
111. a spray gun;
2. a discharge mechanism;
21. a discharge element;
3. spraying a room;
31. a first opening;
32. second opening
33. A suction port;
4. plate and strip;
5. a negative pressure suction assembly;
51. a flow guide hopper;
52. a suction gap;
53. a suction pipe.
Detailed Description
In order to clearly understand the technical solution, the purpose and the effect of the present invention, a detailed description of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the invention provides a vertical plate and strip powder spraying device capable of improving electrostatic powder adsorption capacity, wherein the vertical plate and strip powder spraying device capable of improving electrostatic powder adsorption capacity comprises a spraying mechanism 1 and a discharging mechanism 2, the spraying mechanism 1 comprises a plurality of groups of spraying gun groups 11 arranged at intervals along the length direction of a plate and strip 4, each group of spraying gun group 11 comprises a plurality of spraying guns 111 arranged at intervals along the width direction of the plate and strip 4, the nozzles of each spraying gun 111 face the surface to be sprayed of the plate and strip 4, the discharging mechanism 2 is arranged below the spraying mechanism 1 in the length direction of the plate and strip 4, the discharging mechanism 2 comprises a plurality of discharging ends arranged at intervals along the width direction of the plate and strip 4, and each discharging end faces the surface to be sprayed, in this embodiment, the vertical plate and strip powder spraying device is provided, so that the plate and strip 4 is arranged along the longitudinal direction, namely, each group of spray gun groups 11 are arranged at intervals along the longitudinal direction, each spray gun 111 of each group is transversely arranged, so that the nozzle of each spray gun group faces the surface to be sprayed of the plate strip 4, and the discharge mechanism 2 is also transversely arranged, so that each discharge end of the discharge mechanism 2 also faces the surface to be sprayed of the plate strip 4;
however, in the present invention, the combination of the discharge mechanism 2 and the spraying mechanism 1 may be applied to a spraying apparatus for performing horizontal spraying operation on the sheet strip 4, in this case, the discharge mechanism 2 is preferably located downstream of the spraying mechanism 1, and in the installation, the spray gun groups 11 of the spraying mechanism 1 are adjusted to be spaced apart in the longitudinal direction (i.e., in the transverse direction) of the sheet strip 4, the spray guns 111 of each spray gun group 11 are adjusted to be longitudinally arranged so that the nozzles of the spray guns 111 face the surface to be sprayed of the horizontally arranged sheet strip 4, and the discharge mechanism 2 is adjusted to be longitudinally arranged so that the discharge ends face the surface to be sprayed of the horizontally arranged sheet strip 4.
Further, as shown in fig. 1 and 2, the vertical plate strip powder spraying device capable of improving the electrostatic adsorption capability of powder provided by the present invention includes a plurality of discharging elements 21 arranged at intervals along the width direction of the plate strip 4, each discharging element 21 has a discharging end, so that each discharging element 21 can be replaced or maintained, the number of discharging elements 21 of the discharging mechanism 2 and the distance between every two adjacent discharging elements 21 can be flexibly adjusted according to the width of the plate strip 4, or the discharging mechanism 2 can also be a connected structure, which is not limited by the present invention, and in addition, the voltage of the discharging mechanism 2 in the present invention can be adjusted, which is not limited by the present invention.
Furthermore, the vertical plate-strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder provided by the invention is characterized in that the discharge element 21 is a discharge spray gun, and the discharge end of the discharge spray gun is a discharge needle or an annular discharge nozzle, wherein the discharge spray gun can be in a spray gun structure same as the spray guns 111 in each spray gun group 11, has the functions of powder spraying, air blowing and discharging, and stops the functions of powder spraying and air blowing when being applied as the discharge spray gun so as to only discharge.
Preferably, the vertical type plate strip powder spraying device capable of improving the electrostatic adsorption capacity of powder is provided by the invention, wherein the distance between the discharging mechanism 2 and the spraying mechanism 1 along the width direction of the plate strip 4 is 100-1000 mm, so long as the powder which is not attached to the surface to be sprayed of the plate strip 4 can enter an electrostatic field generated by the discharging mechanism 2 after falling out of the spraying range of the spraying mechanism 1, and the condition that the powder which is not attached to the surface to be sprayed of the plate strip 4 is lifted in the air is reduced; the distance between each discharge end and the surface to be sprayed is 100 mm-500 mm to ensure that the electrostatic field generated by the discharge mechanism 2 has enough electric field intensity, so that the powder which is not attached to the surface to be sprayed of the plate strip 4 can be smoothly charged when passing through the electrostatic field.
Preferably, the vertical type plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder is provided with a plurality of groups of discharging mechanisms 2, and the discharging mechanisms 2 are arranged below the spraying mechanism 1 in the length direction of the plate strip 4 and between at least two adjacent spray gun groups 11 of the spraying mechanism 1, so that the electric field intensity of an electrostatic field generated by the discharging mechanisms 2 can be further enhanced by additionally arranging the discharging mechanisms 2, the charge quantity and the electrostatic adsorption capacity of the powder which is not attached to the surface to be sprayed of the plate strip 4 are improved, and the waste of the powder is reduced. For example, the discharge mechanism 2 is provided between any adjacent spray gun groups 11.
Further, as shown in fig. 1 and fig. 2, the vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of powder provided by the invention, wherein, the vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder also comprises a spraying room 3, the top of the spraying room 3 is provided with a first opening 31 for the plate strip 4 to pass through, the bottom of the spraying room 3 is provided with a second opening 32 for the plate strip 4 to pass through, wherein one of the first opening 31 and the second opening 32 is used as an inlet of the plate strip 4, the other one is used as an outlet of the plate strip 4, the plate strip 4 can move from top to bottom or from bottom to top, the invention is not limited by the above, the spraying mechanism 1 and the discharging mechanism 2 are both arranged in the spraying room 3, and in the state that the plate belt 4 penetrates through the spraying room 3, the spraying mechanism 1 and the discharging mechanism 2 are both positioned on the same side of the plate belt 4 so as to perform electrostatic spraying operation on the surface of one side of the plate belt 4.
Preferably, the vertical plate belt powder spraying device capable of improving the electrostatic adsorption capacity of the powder provided by the invention, wherein an included angle of 0-30 degrees is formed between the central connecting line of the first opening 31 and the second opening 32 and the vertical plane, namely, the plate strip 4 can be in an inclined state when passing through the spraying room 3, an included angle of 0-30 degrees is formed between the plate strip 4 and a vertical plane, the spraying mechanism 1 and the discharging mechanism 2 can be positioned above or below the plate strip 4 in an inclined way, the corresponding surface of the plate strip 4 is sprayed, in the process, the first opening 31 and the second opening 32 can be arranged oppositely in the vertical direction, so that the plate strip 4 and the side wall of the spraying room 3 are kept parallel, or the first opening 31 and the second opening 32 may be staggered in the vertical direction, so that the plate strip 4 forms an included angle with the side wall of the spray room 3, which is not limited in the present invention.
Preferably, as shown in fig. 1 and 2, the vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of powder provided by the invention is characterized in that the bottom of the spraying room 3 is communicated with a negative pressure suction assembly 5 for sucking away a small amount of powder which is still not attached to the surface to be sprayed of the plate strip 4 after passing through an electrostatic field for recycling, so that the waste of the powder is further reduced, and the pollution of the powder overflowing from the second opening 32 at the bottom of the spraying room 3 to the environment is reduced. The negative pressure suction assembly 5 can also be arranged above or at two sides of the spray room, so that the function of sucking the non-attached powder can be realized.
Preferably, as shown in fig. 1 and 2, the vertical plate strip powder spraying device capable of improving electrostatic powder adsorption capacity provided by the invention comprises a negative pressure suction assembly 5, a flow guide hopper 51 and a suction pipe 53, wherein the spraying chamber 3 is provided with a suction port 33, the flow guide hopper 51 is provided with an inlet and an outlet, the suction port 33 is communicated with the inlet of the flow guide hopper 51, the flow guide hopper 51 is tapered from the inlet to the outlet, the outlet of the flow guide hopper 51 is a suction gap 52, the suction gap 52 is communicated with the suction pipe 53, and a small amount of powder which is still not attached to the surface to be sprayed of the plate strip 4 after passing through an electrostatic field enters the suction pipe 53 through the suction port 33, the flow guide hopper 51 and the suction gap 52 in sequence and is sucked for recycling.
However, the present invention is not limited thereto, and the negative pressure suction module 5 may have other conventional structures as long as the function of sucking the non-adhered powder is achieved.
Compared with the prior art, the invention has the following advantages:
according to the vertical type plate strip powder spraying device capable of improving the electrostatic adsorption capacity of the powder, the discharging mechanism is arranged below the spraying mechanism along the length direction of the plate strip, and the electrostatic field generated by discharging of the discharging mechanism enables the powder which is sprayed out by a spray gun of the spraying mechanism and has no or less charges to be charged again when the powder falls down and passes through the electrostatic field, so that the electrostatic adsorption capacity between the powder and the plate strip is improved, the powder coating rate of the powder on the plate strip is greatly improved, and the waste of the powder and the pollution of the powder overflowing a spraying room to the environment are reduced.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (10)
1. The vertical type plate belt powder spraying device capable of improving the powder electrostatic adsorption capacity is characterized by comprising a spraying mechanism and a discharging mechanism, wherein the spraying mechanism comprises a plurality of groups of spray gun groups arranged at intervals along the length direction of a plate belt, each group of spray gun group comprises a plurality of spray guns arranged at intervals along the width direction of the plate belt, the nozzles of the spray guns face the surface to be sprayed of the plate belt, the discharging mechanism is arranged below the spraying mechanism in the length direction of the plate belt, the discharging mechanism comprises a plurality of discharging ends arranged at intervals along the width direction of the plate belt, and the discharging ends face the surface to be sprayed.
2. The vertical strip powder spraying device capable of improving powder electrostatic adsorption capacity according to claim 1, wherein the discharging mechanism comprises a plurality of discharging elements arranged at intervals in the width direction of the strip, and each discharging element is provided with the discharging end.
3. The vertical plate and strip powder spraying device capable of improving powder electrostatic adsorption capacity according to claim 2, wherein the discharge element is a discharge spray gun, and the discharge end of the discharge spray gun is a discharge needle or an annular discharge nozzle.
4. The vertical type powder spraying device for the plate strip, which can improve the electrostatic adsorption capacity of the powder, according to claim 1, wherein the distance between the discharging mechanism and the spraying mechanism in the width direction of the plate strip is 100 mm-1000 mm.
5. A vertical plate-strip powder spraying device capable of improving powder electrostatic adsorption capacity as claimed in claim 1, wherein the distance between each discharge end and the surface to be sprayed is 100 mm-500 mm.
6. The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of powder according to any one of claims 1 to 5, wherein a plurality of groups of the discharging mechanisms are arranged, and the discharging mechanisms are arranged below the spraying mechanisms in the length direction of the plate strip and between at least two adjacent groups of the spraying guns of the spraying mechanisms.
7. The vertical plate and strip powder spraying device capable of improving powder electrostatic adsorption capacity according to any one of claims 1 to 5, further comprising a spraying room, wherein a first opening through which the plate and strip pass is formed in the top of the spraying room, a second opening through which the plate and strip pass is formed in the bottom of the spraying room, the spraying mechanism and the discharging mechanism are both arranged inside the spraying room, and the spraying mechanism and the discharging mechanism are both located on the same side of the plate and strip in a state in which the plate and strip passes through the spraying room.
8. A vertical plate and strip powder spraying device capable of improving electrostatic adsorption capacity of powder as claimed in claim 7, wherein an included angle of 0-30 degrees is formed between a central connecting line of the first opening and the second opening and a vertical plane.
9. The vertical plate strip powder spraying device capable of improving the electrostatic adsorption capacity of powder as claimed in claim 7, wherein a negative pressure suction assembly is communicated with the bottom, the top or the side of the spraying room.
10. The vertical type plate and strip powder spraying device capable of improving electrostatic adsorption capacity of powder as claimed in claim 9, wherein the negative pressure suction assembly comprises a flow guide hopper and a suction pipe, the spraying room is provided with a suction port, the flow guide hopper is provided with an inlet and an outlet, the suction port is communicated with the inlet of the flow guide hopper, the flow guide hopper is tapered from the inlet to the outlet, the outlet of the flow guide hopper is a suction gap, and the suction gap is communicated with the suction pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691217.7A CN111729765A (en) | 2020-07-17 | 2020-07-17 | Vertical plate belt powder spraying device capable of improving electrostatic powder adsorption capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691217.7A CN111729765A (en) | 2020-07-17 | 2020-07-17 | Vertical plate belt powder spraying device capable of improving electrostatic powder adsorption capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111729765A true CN111729765A (en) | 2020-10-02 |
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ID=72654865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010691217.7A Pending CN111729765A (en) | 2020-07-17 | 2020-07-17 | Vertical plate belt powder spraying device capable of improving electrostatic powder adsorption capacity |
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| CN (1) | CN111729765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950827A (en) * | 2022-05-05 | 2022-08-30 | 北京京诚之星科技开发有限公司 | Powder electrostatic spraying room |
-
2020
- 2020-07-17 CN CN202010691217.7A patent/CN111729765A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114950827A (en) * | 2022-05-05 | 2022-08-30 | 北京京诚之星科技开发有限公司 | Powder electrostatic spraying room |
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