CN109530117B - Semi-closed pneumatic drainage device and powder electrostatic spraying device - Google Patents
Semi-closed pneumatic drainage device and powder electrostatic spraying device Download PDFInfo
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- CN109530117B CN109530117B CN201811597372.1A CN201811597372A CN109530117B CN 109530117 B CN109530117 B CN 109530117B CN 201811597372 A CN201811597372 A CN 201811597372A CN 109530117 B CN109530117 B CN 109530117B
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- 239000000843 powder Substances 0.000 title claims abstract description 100
- 238000007590 electrostatic spraying Methods 0.000 title claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims abstract description 123
- 239000002184 metal Substances 0.000 claims abstract description 123
- 238000005507 spraying Methods 0.000 claims abstract description 42
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 239000007921 spray Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000001680 brushing effect Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000007667 floating Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 description 23
- 239000010959 steel Substances 0.000 description 23
- 229910052782 aluminium Inorganic materials 0.000 description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 20
- 238000000034 method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009500 colour coating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
Abstract
The invention discloses a semi-closed pneumatic drainage device and a powder electrostatic spraying device. The semi-closed pneumatic drainage device comprises: a plurality of layers of separated long metal plate strips and a pneumatic device for generating air flow with the angle of 0-120 degrees with the plate surface on one side of the plurality of layers of long metal plate strips. Which utilizes a moving air stream formed on one side of a multi-layered elongated sheet metal strip while the air on the other side is substantially stationary; in the semi-enclosed space between every two layers, the relatively static air pressure is larger than the pressure of flowing air, so that the pressure difference exists between two sides of the two or more layers of plates, the air moves from the side with high pressure to the side with low pressure, and a certain drainage effect is generated. When the pneumatic drainage device is applied to electrostatic powder spraying, the lifted floating powder at the edge of the sprayed plate belt can be sucked and pulled. The powder adhering amount of the edge of the sprayed plate strip is reduced, and the edge is prevented from being too thick; and meanwhile, the sprayed powder is prevented from adhering to the spraying back side of the sprayed plate belt.
Description
Technical Field
The invention relates to the field of powder electrostatic spraying, in particular to a semi-closed pneumatic drainage device and a powder electrostatic spraying device.
Background
At present, most color-coated plates in China adopt a mode of coating plates and coils by solvent type liquid paint. There are fewer production lines for continuous electrostatic spraying of powder on intermittent steel plates, aluminum plates or steel coils or aluminum coils.
For intermittent steel plates and aluminum plates, a plurality of steel plates and aluminum plates with equal length and width are orderly stacked in a multi-layer accumulating way for the finished products of baked color-coated plates after powder spraying is finished, and the number of the steel plates and the aluminum plates is hundreds to thousands. The thickness of the stacked multilayer plates is required to be consistent, the thickness of the powder coating sprayed on each plate is required to be consistent, otherwise, the thickness of the stacked plates in a long and wide range is uneven, the plates cannot be packaged neatly and reasonably uniformly, and the sprayed plate products are disqualified due to the fact that the plates are deformed locally due to the uneven heights.
Also, for steel coils (bands) or aluminum coils (bands), the number of turns of coils rolled into coiled plates (bands), namely the number of layers is as high as hundreds to thousands, if the thickness of powder coating sprayed on the coils is inconsistent, the thickness of the coiled coils with equal width in the width range is uneven, the coil diameters are inconsistent, and the appearance is unsightly; in addition, the coiled multi-layer plates (belts) bear great tension in the process of coiling, the coiled plates (belts) are tightly tightened, and the later uncoiled and uncoiled plates (belts) have convex-concave deformation due to uneven steel coil, which is not allowed and cannot be used as waste products.
For the electrostatic powder spraying intermittent plate and the spraying continuous rolling plate, because the plate and the rolling area are large, a large amount of powder needs to be sprayed to the plate surface at the same time, and a large amount of compressed air is required to be used for spraying the powder. Because the spraying device is basically vertical to the plate surface and the rolling surface, the sprayed compressed air carries electrostatic powder to be sprayed to the surface of the steel plate vertically. Wherein a large part of the powder is attached to the surface of the plate coil, and the powder which is not attached to the surface of the plate coil is pressed by compressed air and can horizontally move along the width directions of the plate belt surface to the width edge parts of the plate (belt).
Typically electrostatic powder spraying is performed in a spray booth where the panels (belts) are placed. Since there is an unattached excess powder, the excess powder needs to be sucked away, a structural device of a negative pressure suction or port is generally provided on the opposite side (not far) along the spraying direction of the spraying device to suck the excess powder. For intermittent steel plates, aluminum plates, continuous steel coils, aluminum coils, assuming the surface level of the coil (belt), if powder is sprayed thereon, a suction port device for sucking the unnecessary powder is located below. If powder is sprayed underneath, the suction opening device that sucks in excess powder that is not attached is still underneath.
Since the excessive powder with speed and power blown out perpendicular to the surface of the coil flows through the width edge of the coil, and negative pressure suction force is provided below the coil, when the disturbance powder flowing from the upper surface of the coil through the edge passes through the edge downwards and the coil edge, vortex motion is generated, and the powder can be rewound to the edge of the bottom surface (the other side of the sprayed surface) of the plate (tape) and attached.
Since both color powders are required for the upper and lower surfaces of the board roll when the board and roll are powder coated, it is required that the lower surface of the board roll cannot or as little as possible adhere to the upper surface of the board roll to require a color, i.e., another color of powder.
Furthermore, as is apparent from the above description, for the coil spraying, since the coil area is large, the spraying device on the side of coil spraying simultaneously ejects a large amount of powder to the coil; and because the width of the plate coil is wider, the excessive unattached powder can drift from the middle part of the width of the plate coil to the edge part of the width of the plate coil. During this drifting, some Xu Fenmo is attached to the deck. This results in a wider edge of the board having a greater thickness of powder than the middle of the board.
The intermittent steel plates and the aluminum plates are required to be orderly stacked from hundreds to thousands of layers of steel plates before being packaged and transported; for steel or aluminum rolls, the roll is rolled into a roll with thousands of layers, the problem that the width of the roll is thicker at the edge than at the middle is marked by the powder coating thickness ≡! Namely, a plurality of layers of intermittent steel plates and aluminum plates which are stacked are tilted at the upper edge part of the width and concave in the middle, and cannot be packaged in order; for the steel coil or the aluminum coil, edge warping and middle concave are generated in the width direction, and the steel coil or the aluminum coil is judged to be waste in the color coating industry.
In order to reduce the powder removed by the plate tape Bian Bupiao and to reduce the adhesion of floating powder to the edges of the plate (tape), there is a porous (tube) suction device provided at the edge of the sprayed plate (tape). As shown in fig. 1 and 2, a plurality of suction pipes 101 parallel to each other are arranged in a short distance along the edge of the sprayed strip 2, perpendicular to the running direction 103 of the sprayed strip. The plurality of suction pipes 101 are inserted into a negative pressure main pipe 102.
There are a number of disadvantages to this type of device. Firstly, because the diameter of the powder suction pipe orifice cannot be set too large, otherwise, the negative pressure suddenly drops, the suction force and the powder suction efficiency are low, or the diameter of the main negative pressure pipe is required to be large, and a large pipeline is not suitable to be arranged in a spray booth. The floating range of the powder lifted by the plate and the curled edge is larger and is far larger than the caliber of the powder suction pipe, so that the floating powder cannot be mostly sucked into the powder suction pipe, namely the powder suction effect and the powder suction efficiency of the powder suction pipe are poor. And secondly, a plurality of powder suction pipes are arranged in parallel along the main negative pressure pipe, and the negative pressure generating ports of the main negative pressure pipe can only be arranged at two ends of the main pipe or a plurality of negative pressure generating ports are arranged in a limited way along the length of the main pipe. The negative pressures of the pipe orifices of the powder suction pipes along the length direction of the plate belt are inconsistent, and the difference is larger. The uneven powder sucking capacity along the length direction of the plate belt can be seriously caused. In addition, most of the existing continuous coiled plate electrostatic powder spraying production lines enter a spraying room in a horizontal state, and as the continuously sprayed steel coil or aluminum coil horizontally enters the spraying room, the plate belt cannot be provided with a carrier roller or a lifting device, and therefore the plate belt naturally hangs and is not flat in the spraying process in the spraying room; and the plate belt is slightly floated in the running process, and for the powder suction pipe orifices which are arranged in parallel on the main negative pressure pipe, the pipe material is a hard pipe, so that the plate belt is hard to be directly opposite to the edge part of the overhanging plate belt, and the powder suction efficiency is reduced.
Therefore, the following two technical problems are needed to be solved: firstly, the two sides of the other side of the sprayed surface at the edge of the plate surface cannot be adhered to or the adhesion of powder with another color is reduced as much as possible, secondly, the thickness of the powder at the edge of the plate is larger than that of the powder at the middle part, and an excessive powder suction device is required to be arranged at the edge of the plate in the spraying process, so that a large amount of floating powder is sucked away, and the occurrence of the problems is reduced or slowed down.
Disclosure of Invention
In order to solve the two technical problems, the invention provides a semi-closed pneumatic drainage device and a powder electrostatic spraying device. The semi-closed pneumatic drainage device is an auxiliary device in intermittent or continuous electrostatic powder spraying of a plane intermittent steel plate, an aluminum plate or a steel coil and an aluminum coil; by forming a moving air flow on one side of the multi-layer long metal plate strip, and the air on the other side of the long metal plate strip is basically static, the pressure of the air which is relatively static on the side is larger than that of the air which moves and flows on the other side in a semi-closed space between every two layers of metal plate strips, so that a pressure difference exists between two sides of the two or more layers of plate strips, and the air moves from the side with high pressure to the side with low pressure, so that a certain drainage effect is generated. The semi-closed pneumatic drainage device is applied to a powder electrostatic spraying device, and particularly, a plurality of layers of long metal plate strips are arranged on the width side face of a sprayed plate strip, so that the raised floating powder at the edge of the sprayed plate strip can be sucked and pulled. The powder adhering amount of the edge of the sprayed plate strip is reduced, and the edge is prevented from being too thick; and meanwhile, the sprayed powder is prevented from adhering to the spraying back side of the sprayed plate belt. The intermittent steel plate and the aluminum plate can be leveled when being stacked and packaged in multiple layers, and the steel coil and the aluminum coil are not deformed and edge-turned after being curled for multiple circles.
For convenience of description, the invention uses a short-term plate strip, wherein the plate strip refers to a plane intermittent steel plate, an aluminum plate, a steel coil (strip), an aluminum coil (strip) and the like.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in one aspect, the present invention provides a semi-closed pneumatic drainage device comprising: a plurality of layers of separated long metal plate strips and a pneumatic device for generating air flow with the angle of 0-120 degrees with the plate surface on one side of the plurality of layers of long metal plate strips.
The semi-closed pneumatic drainage device utilizes the air flow which forms movement on one side of a plurality of layers of long metal plate strips, and the air on the other side of the long metal plate strips is basically static, so that in a semi-closed space between every two layers of metal plate strips, the air pressure of the side which is relatively static is larger than the pressure of the air which moves and flows on the other side, and then the pressure difference exists between two sides of the two layers or the plurality of layers of plate strips, and the air moves from the side with high pressure to the side with low pressure, so that a certain drainage effect can be generated.
In this scheme, pneumatic means can produce the air current that blows to the face, still can produce the air current through the suction effect. The particular pneumatic device may be any device known in the art sufficient to generate an air flow, such as a blower or suction device, etc.
On the other hand, the semi-closed pneumatic drainage device is applied to the powder electrostatic spraying device to solve the technical problems that the edge of the sprayed plate belt is too thick and powder is adsorbed on the spraying back side of the sprayed plate belt. In addition, the semi-closed pneumatic drainage device can be applied to other devices needing drainage.
Specifically provided is a powder electrostatic spraying device, comprising: the device comprises a spray room, a suction device and a plurality of separated long metal plate strips;
the spraying room comprises a negative pressure suction air port arranged on the side wall of the sprayed back side of the sprayed plate and strip, and an air inlet positioned on the opposite side of the negative pressure suction air port; the separated multi-layer long metal plate strips are arranged on two sides or one side of the width of the sprayed plate strip along the running direction of the sprayed plate strip in the spraying range; the extending direction of the long metal plate belt is consistent with the running direction of the sprayed plate belt;
the suction device sucks air from the negative pressure suction air port to form air flow blown to the outer side plate surface of the multi-layer long metal plate belt; the direction of the air flow forms 0-120 degrees with the strip surface of the long metal plate.
Preferably, the air inlet comprises an air inlet arranged on the side wall of the sprayed side of the sprayed plate belt and on the parts, close to the sprayed side, of the side walls on two sides of the sprayed plate belt.
Further preferably, the air inlet provided on the side wall of the sprayed side of the sprayed strip is diametrically opposed to the elongated metal strip. Namely, when the sprayed plate belt is horizontally placed or horizontally hung, the air inlet is positioned right above the long metal plate belt; when the sprayed plate belt is vertically hung, the long metal plate belt is also in a vertical state, and the air inlet is positioned on the right side of the long metal plate belt; similar when tilted.
Preferably, the vertical distance between the edge of the outermost layer of the multi-layer long metal plate strip, which is close to one side of the sprayed plate strip, and the surface of the sprayed plate strip is 0-100 mm. That is, when the sprayed strip is placed horizontally or hung horizontally, the uppermost layer of the multi-layer long metal strip is close to one side edge of the sprayed strip and can be equal in height to the sprayed strip, or can be higher or lower than the sprayed strip; the sprayed strip is hung vertically or placed obliquely and so on.
Preferably, the length of the long metal plate strip is slightly beyond the spraying range, preferably 0.5-50 m.
Preferably, the thickness of the long metal plate strip is 0.1-5 mm.
Preferably, the width of the long metal plate strip is 40-500 mm.
Preferably, the distance between the edges of the long metal plate strip and the sprayed plate strip, which are close to each other, is 10-200 mm.
Preferably, on a section perpendicular to the running direction of the sprayed strip, an angle of-5 to 45 degrees is formed between the outermost layer of the multi-layer long metal strip and the sprayed strip.
Preferably, the layers are parallel to each other. It will be readily appreciated by those skilled in the art that the layers may also be disposed at an angle.
Preferably, the multiple layers are arranged at equal intervals, and the interval distance is 10-200 mm; or the multiple layers are arranged at unequal intervals, and the intervals are not more than 200mm.
Preferably, the multiple layers are 2-5 layers.
Preferably, both ends of the elongated metal strip in the extending direction are fixed by a fixing structure.
Preferably, the long metal plate belts are arranged at intervals of even layers, and two ends of the extending direction of the long metal plate belts are connected with transmission idler structures of conveyor belts.
Preferably, when the sprayed plate belt is in a horizontal state or an inclined state, one end or two ends of the extending direction of the long metal plate belt are provided with brushing structures on the inner side of the transmission carrier roller structure on one side above the sprayed plate belt.
Preferably, the brushing structure is a brush or a scraper.
Preferably, two ends of the extending direction of the long metal plate belt are connected with an axially rotatable connecting mechanism.
Drawings
FIG. 1 is a schematic view of a prior art plate strip with negative pressure suction tube structures on both sides.
Fig. 2 is a schematic cross-sectional view of fig. 1 in the direction a.
FIG. 3 is a schematic structural view (horizontal natural overhang) of a semi-enclosed multi-layer drainage powder electrostatic spraying device according to a preferred embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of the sprayed strip, sheet metal strip, and spray booth shown in fig. 3B.
Fig. 5 is a schematic installation view of the fixing structure of both ends of the metal plate strip shown in fig. 3.
Fig. 6 is a schematic installation view of the structure of the driving idler at two ends of the metal plate belt shown in fig. 3.
Fig. 7 is a schematic view of the installation of the axial rotation structure of both ends of the metal plate strip shown in fig. 3.
Reference numerals illustrate:
101-a powder suction tube; 102-a negative pressure main pipeline; 103-the running direction of the sprayed plate belt; 1-an elongated sheet metal strip; 2-a sprayed board belt; 3-distance between the edges of the long metal plate strip and the sprayed plate strip; 4-a fixed structure; 5-a transmission carrier roller mechanism; 6-an axial rotation mechanism; 7-brushing structure; 8, forming an included angle between the strip surface of the long metal plate and the strip surface of the sprayed plate on the section; 9-air flow; 10-forming an included angle between the air flow and the surface of the sprayed board on the section; 11-spraying room; 12-spraying side of the sprayed plate belt; 13-spraying the back side of the sprayed plate strip; 14-negative pressure suction tuyere; 15-an air inlet; 16-spray booth side wall.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
The embodiment of the invention specifically describes a semi-closed starting drainage device and a working principle thereof by combining with electrostatic spraying. The specific invention thought in electrostatic spraying is as follows: an air flow blowing to one side of the strip surface of the multi-layer long metal plate is generated through an air inlet and a negative pressure suction air inlet which are arranged on the spray room. Because there is a moving air flow approximately perpendicular to the plane of the multi-layer elongated sheet metal strip on one side and the air on the other side is substantially stationary, in the semi-enclosed space between each two layers of sheet metal strips, the relatively stationary air pressure on that side is greater than the moving, moving air pressure on the other side, there is a pressure differential between the two or more layers of sheet metal strips, during which air moves from the side with the greater pressure to the side with the lower pressure, and there is suction and pulling action on the raised powder at the edges of the sprayed sheet strips. The powder adhering amount of the edge of the sprayed plate strip is reduced, and the edge is prevented from being too thick; and meanwhile, the sprayed powder is prevented from adhering to the spraying back side of the sprayed plate belt.
In addition, as the multi-layer metal plate strips are arranged in parallel on the edges of the two sides of the whole length of the sprayed plate strip, and the distance between the long metal plate strip and the edge of the sprayed plate strip is very close and is approximately equidistant, the suction effect is relatively uniform; in addition, the moving air flow outside the long metal plate belt has a larger space and is relatively open, so that the difference of air flow speeds is smaller, the pressure difference of two or more layers of long metal plate belts is approximately equal in the whole length range, and the floating powder sucking capacity is relatively uniform along the running direction of the sprayed plate belt.
The pressure difference generated outside the multi-layer long metal plate belt is larger and the suction capacity is larger because the air flow moving on two sides of the sprayed plate belt, namely the air quantity is larger. And because the opening on the adjacent side of the multi-layer long metal plate belt and the sprayed plate belt is larger, floating powder in a larger range can be pumped away. Therefore, the powder suction effect of the invention is excellent.
Specifically, the electrostatic spraying adopts the following general technical scheme: a powder electrostatic spraying device comprising: a spray booth, a suction device and a plurality of separated layers of long metal plate strips. Those skilled in the art will appreciate that other components used for electrostatic powder spraying such as sprayers are also included in the powder electrostatic spraying device. The spraying room comprises a negative pressure suction air port arranged on the side wall of the sprayed back side of the sprayed plate and strip, and an air inlet positioned on the opposite side of the negative pressure suction air port; the separated multi-layer long metal plate strips are arranged on two sides or one side of the width of the sprayed plate strip along the running direction of the sprayed plate strip in the spraying range; the extending direction of the long metal plate belt is consistent with the running direction of the sprayed plate belt. The suction device sucks air from the negative pressure suction air port to form air flow blown to the outer side plate surface of the multi-layer long metal plate belt; the direction of the air flow forms 0-120 degrees with the strip surface of the long metal plate.
Wherein, as a preferable scheme, the air inlet comprises an air inlet arranged on the side wall of the sprayed side of the sprayed plate belt and on the parts, close to the sprayed side, of the side walls on two sides of the sprayed plate belt. Further preferably, the air inlet provided on the side wall of the sprayed side of the sprayed strip is diametrically opposed to the elongated metal strip. Namely, when the sprayed plate belt is horizontally placed or horizontally hung, the air inlet is positioned right above the long metal plate belt; when the sprayed plate belt is vertically hung, the long metal plate belt is also in a vertical state, and the air inlet is positioned on the right side of the long metal plate belt; similar when tilted.
The vertical distance between the edge of one side of the outermost layer of the multi-layer long metal plate strip, which is close to the sprayed plate strip, and the surface of the sprayed plate strip is 0-100 mm. That is, when the sprayed strip is placed horizontally or hung horizontally, the uppermost layer of the multi-layer long metal strip is close to one side edge of the sprayed strip and can be equal in height to the sprayed strip, or can be higher or lower than the sprayed strip; the sprayed strip is hung vertically or placed obliquely and so on.
For a multi-layered elongated sheet metal strip (preferably 2-5 layers), preferably its length is 0.5-50 m; further preferably, the thickness of the elongated metal strip is 0.1 to 5mm. Preferably, the width of the elongated sheet metal strip is 40-500 mm. Preferably, the distance between the edges of the elongated metal strip and the sprayed strip that are close to each other is 10-200 mm. Preferably, on a section perpendicular to the running direction of the sprayed strip, an angle of-5 degrees to 45 degrees is formed between the outermost layer of the multi-layer long metal strip and the sprayed strip; preferably, the multiple layers of the long metal plate strips are parallel; it may also be non-parallel. The layers are arranged at equal intervals, and the interval distance is 10-200 mm; or the multiple layers are arranged at unequal intervals, and the intervals are not more than 200mm.
Regarding the fixing mode of the long metal plate belt, three preferred schemes are used in the invention:
first kind: the two ends of the extension direction of the long metal plate strip are fixed through the fixing structure.
Second kind: the long metal plate belts are arranged at intervals of even layers, and two ends of the extending direction of the long metal plate belts are connected with transmission carrier roller structures of conveyor belts.
At this time, preferably, when the sprayed strip is in a horizontal state or an inclined state, a brushing structure is provided at one end or both ends of the extending direction of the elongated metal strip at the inner side of the transmission carrier roller structure at the upper side of the sprayed strip; the long metal belt is driven to move by the rotation of the driving roller, so that the powder adsorbed on the long metal plate belt is timely removed.
Further preferably, the brushing structure is a brush or a scraper.
Third kind: and two ends of the extension direction of the long metal plate belt are connected with an axially rotatable connecting mechanism. When axially rotated, the powder adsorbed on the long metal plate belt can be poured off.
The present invention provides herein a particularly preferred embodiment, as shown in fig. 3 and 4, of a semi-enclosed multi-layer drainage powder electrostatic spraying device comprising: a spray booth 11, suction means and a separate multi-layered elongated metal sheet 1.
The spray booth 11 comprises a negative pressure suction air port 14 arranged on the side wall of the sprayed back side 13 of the sprayed plate and strip, and an air inlet 15 positioned at the opposite side of the negative pressure suction air port 14; suction means for drawing air from the negative pressure suction tuyere 14 to form an air stream 9 blown toward the strip face of the elongated metal plate; the included angle between the air flow and the sprayed plate strip is shown as 10 in fig. 4, and the angle between the air flow 9 and the long metal plate strip surface is 0-120 degrees. Specifically, the air inlet 15 includes air inlets provided on the side wall of the sprayed side 12 of the sprayed strip and on portions of the side wall on both sides of the sprayed strip near the sprayed side. The air inlet arranged on the side wall of the sprayed side of the sprayed plate belt, namely the air inlet on the upper side in fig. 3 and 4, is positioned right above the long metal plate 1. And the air inlet 15 in the preferred embodiment is elongated.
The multi-layer long metal plate strip 1 is arranged on two sides of the width of the sprayed plate strip 2 along the running direction of the sprayed plate strip in the spraying range.
Specifically, the extending direction of the long metal plate strip 1 is consistent with the running direction of the sprayed plate strip 2. The sprayed strip in the preferred embodiment is in a horizontal, natural overhang pattern, and those skilled in the art will appreciate that the sprayed strip may also be vertical, inclined or horizontal, with the elongated sheet metal strip correspondingly also being vertical, inclined or horizontal and approximately parallel thereto. The positions of the negative pressure suction air inlet and the air inlet are correspondingly arranged. In addition, as shown in fig. 4, the present invention may also be as follows: in fig. 4, the spray side 12 and the spray side back side 13 are turned upside down, i.e. the lower side is the spray side and the upper side is the spray side back side; others are unchanged.
As shown in fig. 4, two layers of long metal plate strips 1 are arranged in parallel, and the spacing distance is preferably 10-200 mm; and the height difference between the edge of one side of the upper layer, which is close to the sprayed plate strip 2, and the sprayed plate strip 2 is 0, namely the upper layer is flat. In addition, the height difference can be within 100mm higher or lower than the sprayed plate strip 2.
For the long sheet metal strip itself, its length is preferably 0.5 to 50m; the thickness of the side of the sprayed board strip 2 is preferably 0.1-5 mm; the width is preferably 40 to 500mm. The distance between the edges of the elongated metal strip 1 and the sprayed strip 2, which are close to each other, is, as indicated by 3 in fig. 4, preferably 10-200 mm.
As shown in fig. 4, the angle between the upper layer elongated metal strip 1 and the sprayed strip 2, as indicated by 8, is preferably in the range of-5 deg. to 45 deg. in a section perpendicular to the running direction of the sprayed strip. Wherein the positive and negative are opposite, if the angle on the way is set to be positive, the opposite direction angle is negative; of course, the two may be set in opposite directions.
As shown in fig. 5, in a first preferred fixing manner of the elongated metal strip according to the present invention, both ends of the elongated metal strip 1 in the extending direction are fixed by fixing structures 4.
As shown in fig. 6, in order to provide a second preferred fixing manner of the elongated metal strip according to the present invention, two ends of the elongated metal strip 1 in the extending direction are connected with a belt type driving roller structure 5. The spraying side 12 of the sprayed plate belt, and the two ends of the extension direction of the long metal plate belt 1 are provided with brushing structures 7 at the inner side of the transmission carrier roller structure 5; preferably, the brushing structure 7 is a brush or a scraper.
The bottom of the sprayed plate belt horizontally entering the spraying room cannot be provided with a carrier roller, the sprayed plate belt is in a natural suspension state in the spraying room, two ends of the sprayed plate belt are outside the spraying room, two ends of the sprayed plate belt can be supported by the carrier roller, two ends of two or more layers of metal plate belts at two sides of the sprayed plate belt are supported by a fixing device or the carrier roller, and the sprayed plate belt is in a natural suspension state, so that the sprayed plate belt can be well parallel, aligned and aligned with the edge part of the sprayed plate belt.
For horizontal or inclined running strips, the long metal strips also have a lot of adhesive powder build-up due to the long continuous spraying time of the strips, which reduces the effectiveness of the device in sucking floating powder. When the transmission carrier roller structure of the conveyor belt is adopted, the carrier roller can be rotated to enable the long metal plate belt to run, scraping plates or brushes are arranged on two sides of the long metal plate belt, and accumulated floating powder moving on the long metal plate belt is removed.
As shown in fig. 7, in order to provide a third preferred fixing method of the elongated metal strip according to the present invention, two ends of the elongated metal strip 1 in the extending direction are connected with an axially rotatable engagement mechanism 6.
When the two ends are connected with the metal belt by adopting the axial rotating mechanism, the metal belt can rotate along the length axis direction by the driving mechanism, and accumulated powder on the metal belt can be overturned.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (14)
1. A powder electrostatic spraying device, comprising: the device comprises a spray room, a suction device and a plurality of separated long metal plate strips; the multiple layers of long metal plate strips are parallel;
the spraying room comprises a negative pressure suction air port arranged on the side wall of the sprayed back side of the sprayed plate and strip, and an air inlet positioned on the opposite side of the negative pressure suction air port; the air inlet comprises an air inlet arranged on the side wall of the sprayed side of the sprayed plate belt and on the part, close to the sprayed side, of the side wall of the two sides of the sprayed plate belt;
the separated multi-layer long metal plate strips are arranged on two sides or one side of the width of the sprayed plate strip along the running direction of the sprayed plate strip in the spraying range; the extending direction of the long metal plate belt is consistent with the running direction of the sprayed plate belt;
the suction device sucks air from the negative pressure suction air port to form air flow blown to the outer side plate surface of the multi-layer long metal plate belt; the direction of the air flow forms 0-120 degrees with the strip surface of the long metal plate;
a moving air flow is formed on one side of the multi-layer long metal plate strip, and the air on the other side of the long metal plate strip is basically static, so that in a semi-closed space between every two layers of metal plate strips, the air pressure of the side which is relatively static is larger than the air pressure of the moving and flowing air on the other side, and then a pressure difference exists between two sides of the two layers or multiple layers of plate strips, and the air moves from the side with high pressure to the side with low pressure, so that a certain drainage effect is generated.
2. The powder electrostatic spraying device according to claim 1, wherein the air inlet provided on the side wall of the sprayed side of the sprayed strip is diametrically opposed to the elongated metal strip.
3. The powder electrostatic spraying device according to claim 1, wherein a vertical distance between an edge of an uppermost layer of the multi-layer long metal plate strip, which is close to a plate surface of the sprayed plate strip, and the plate surface of the sprayed plate strip is 0-100 mm.
4. The powder electrostatic spraying device according to claim 1, wherein the length of the elongated metal strip is 0.5-50 m.
5. The powder electrostatic spraying device according to claim 1, wherein the thickness of the elongated metal strip is 0.1 to 5mm.
6. The powder electrostatic spraying device according to claim 1, wherein the width of the elongated metal sheet strip is 40-500 mm.
7. The powder electrostatic spraying device according to claim 1, wherein a distance between edges of the elongated metal strip and the sprayed strip, which are close to each other, is 10 to 200mm.
8. The powder electrostatic spraying device according to claim 1, wherein an angle of-5 ° to 45 ° is formed between an outermost layer of the multi-layered long metal plate strip and the sprayed plate strip in a section perpendicular to a running direction of the sprayed plate strip.
9. The powder electrostatic spraying device according to claim 1, wherein the multiple layers are arranged at equal intervals, and the interval distance is 10-200 mm; or the multiple layers are arranged at unequal intervals, and the intervals are not more than 200mm.
10. The powder electrostatic spraying device according to claim 1, wherein both ends of the elongated metal strip in the extending direction are fixed by fixing structures.
11. The electrostatic powder spraying device according to claim 1, wherein the elongated metal strips are arranged at intervals of even number of layers, and both ends of the elongated metal strips in the extending direction are connected with a conveyor-type driving roller structure.
12. The powder electrostatic spraying device according to claim 11, wherein one or both ends of the elongated metal strip in the extending direction are provided with a brushing structure inside the transmission idler structure on the upper side of the sprayed strip when the sprayed strip is in a horizontal state or an inclined state.
13. The powder electrostatic spraying device of claim 12, wherein the brushing structure is a brush or a squeegee.
14. The electrostatic powder spraying device according to claim 1, wherein both ends of the elongated metal strip in the extending direction are connected with axially rotatable engagement mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597372.1A CN109530117B (en) | 2018-12-26 | 2018-12-26 | Semi-closed pneumatic drainage device and powder electrostatic spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597372.1A CN109530117B (en) | 2018-12-26 | 2018-12-26 | Semi-closed pneumatic drainage device and powder electrostatic spraying device |
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| Publication Number | Publication Date |
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| CN109530117A CN109530117A (en) | 2019-03-29 |
| CN109530117B true CN109530117B (en) | 2024-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811597372.1A Active CN109530117B (en) | 2018-12-26 | 2018-12-26 | Semi-closed pneumatic drainage device and powder electrostatic spraying device |
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| US3263127A (en) * | 1961-04-14 | 1966-07-26 | Sames Mach Electrostat | Means for electrostatic coating |
| CN1294031A (en) * | 1999-10-26 | 2001-05-09 | Ace实验室株式会社 | Appts. and method for collecting dust by strong charged super-fined dripping |
| CN200952406Y (en) * | 2006-09-18 | 2007-09-26 | 中国药品生物制品检定所 | Blocking frame ventilating and dust removing equipment |
| CN104588251A (en) * | 2015-02-13 | 2015-05-06 | 北京京诚之星科技开发有限公司 | Powder covering and sweeping device during electrostatic powder spraying |
| CN209423881U (en) * | 2018-12-26 | 2019-09-24 | 中冶京诚工程技术有限公司 | Semiclosed pneumatic drainage device and electrostatic powder spraying device |
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2018
- 2018-12-26 CN CN201811597372.1A patent/CN109530117B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3263127A (en) * | 1961-04-14 | 1966-07-26 | Sames Mach Electrostat | Means for electrostatic coating |
| CN1294031A (en) * | 1999-10-26 | 2001-05-09 | Ace实验室株式会社 | Appts. and method for collecting dust by strong charged super-fined dripping |
| CN200952406Y (en) * | 2006-09-18 | 2007-09-26 | 中国药品生物制品检定所 | Blocking frame ventilating and dust removing equipment |
| CN104588251A (en) * | 2015-02-13 | 2015-05-06 | 北京京诚之星科技开发有限公司 | Powder covering and sweeping device during electrostatic powder spraying |
| CN209423881U (en) * | 2018-12-26 | 2019-09-24 | 中冶京诚工程技术有限公司 | Semiclosed pneumatic drainage device and electrostatic powder spraying device |
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| Publication number | Publication date |
|---|---|
| CN109530117A (en) | 2019-03-29 |
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