Multi-roof side-by-side coating booth

Abstract

The present application relates to a kind of multiple roof side-by-side type coating spray booth, including roof assembly and two side plates, two side plates are located below the two sides of roof assembly, and form spray powder cavity between roof assembly, and the coated plate is moved below spray powder cavity;The roof assembly includes multiple roof, each roof is arranged in the direction of plate strip movement above spray powder cavity, and forms roof inlet air passage between adjacent roof;The frontmost roof forms front inlet air passage between plate strip, and the last end of roof is connected to exhaust system;The outer side end of each roof is fixedly provided with air blowing pipe, multiple air blowing holes are opened in the air blowing pipe, the air blowing hole is suitable for air blowing to the lower surface and / or upper surface of roof, and the air blowing hole is located between two adjacent spray guns;Multiple spray guns are respectively arranged in each roof inlet, and the spray gun is suitable for spraying powder into spray powder cavity. Ensure that air blowing covers all possible dust-absorbing plate surface, and the air pressure of air blowing is large enough to prevent powder from being absorbed on the plate, to avoid powder accumulation on the roof.

Description

TECHNICAL FIELD

[0001] The present application relates to a multi-top plate side-by-side type coating spray room. BACKGROUND

[0002] The applicant previously applied for a powder spraying device with patent application number 201811616272.9. The powder spraying device is configured with a high-voltage electrostatic powder spraying chamber, so that the powder in the powder spraying chamber moves in the same direction as the plate belt on one side, so that the powder coating is adsorbed on the surface of the plate belt by electrostatic adsorption.

[0003] Currently, in order to adapt to the horizontal movement of the plate belt, the powder spraying device needs to be arranged horizontally, and the plate belt moves below the powder spraying chamber. During operation, the sprayed powder will float in the air after being charged, and will inevitably be adsorbed by the spraying equipment above the strip steel. As long as there is adsorption, the powder will increase, and eventually it will fall. The powder block that falls on the sprayed plate belt will appear powder packs and impurity points, which will seriously affect the product quality. The powder accumulation problem caused by the floating of electrostatic powder spraying is a very serious problem that color steel plate coating must encounter, and it has been a major technical problem that has not been completely solved for a long time. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a multi-top plate side-by-side type coating spray room to solve the problem of powder accumulation above the previous spraying equipment.

[0005] The technical solution adopted by the present application to solve the technical problem is:

[0006] A multi-top plate side-by-side type coating spray room is provided, comprising

[0007] a roof assembly and two side plates, the two side plates are located below the two sides of the roof assembly and form a powder spraying chamber with the roof assembly, and the plate belt moves below the powder spraying chamber;

[0008] The roof assembly comprises a plurality of top plates, each top plate is arranged along the moving direction of the plate belt above the powder spraying chamber, and a top air inlet channel is formed between adjacent top plates; a side air inlet channel is formed between the frontmost side top plate and the plate belt, and the rearmost side top plate is connected to an exhaust system;

[0009] A gas blowing pipe is fixedly arranged on the outer side edge of each top plate, a plurality of gas blowing holes are formed in the gas blowing pipe, the gas blowing holes are adapted to blow air towards the lower surface and / or the upper surface of the top plate, and the gas blowing holes are located between two adjacent spray guns;

[0010] A plurality of spray guns are arranged in each top inlet, and the spray guns are adapted to spray powder into the powder spraying chamber.

[0011] Further, each top plate is arranged in an inclined manner.

[0012] The adjacent top plates form an inclined top air inlet channel.

[0013] Further, the top plates are arranged horizontally, and each top plate forms a stepped structure.

[0014] The adjacent top plates form a horizontal top air inlet channel.

[0015] Further, the spray gun comprises

[0016] A spray gun head in a tubular structure;

[0017] A blowing capillary tube arranged in the spray gun head; and

[0018] A high-voltage electric needle arranged in the blowing capillary tube.

[0019] Further, the spray gun is inclined towards the moving direction of the plate belt.

[0020] Further, the assembly structure between the top plate and the side plate is as follows:

[0021] A plurality of insertion slots are arranged on the upper end of the side plate, the insertion slots are inclined, and the end of the top plate is inserted into the insertion slot, so that the top plate is arranged inclined on the side plate.

[0022] The beneficial effects of the present application are as follows:

[0023] The coating spray house of the present application arranges a plurality of top plates on the powder spraying cavity as a top air inlet channel, the spray gun supplies powder into the powder spraying cavity through the top air inlet channel, a blowing pipe is arranged on the top plate, the blowing pipe blows air to the upper and lower surfaces of the top plate through blowing holes, the airflow blown by the blowing holes is opened between the two spray guns, the blowing covers all the plate surfaces that may adsorb powder, the air pressure of the blowing is large enough to prevent the powder from being adsorbed on the plate, and powder accumulation on the top plate is avoided.

[0024] The powder spraying cavity is a continuous negative pressure closed space, the powder is in a continuous closed space after entering the powder spraying cavity, and the powder cannot overflow, which is suitable for continuous spraying of a continuous plate belt.

[0025] By controlling the suction of the air extraction system, the speed of the powder airflow in the forward direction can be controlled to be synchronized with the plate belt, thereby solving the technical problem of low powder application rate on a high-speed plate belt. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below with reference to the drawings.

[0027] Figure 1 is a schematic view of the coating spray house of Example 1;

[0028] Figure 2 is a schematic view of the blowing pipe blowing air to the upper surface of the top plate;

[0029] Figure 3 This is a schematic diagram of air blowing through the air pipe onto the lower surface of the top plate.

[0030] Figure 4 This is a half-section view of the painting spray booth;

[0031] Figure 5 This is a diagram of a spray gun;

[0032] Figure 6 This is the assembly drawing between the top plate and the side plates;

[0033] Figure 7 This is a schematic diagram of the coating spray booth in Example 2;

[0034] Among them, 1. Plate and strip;

[0035] 21. Top panel; 22. Side panel; 23. Back panel;

[0036] 3. Air tube;

[0037] 4. Spray gun; 41. Spray gun head; 42. Air blowing capillary tube; 43. High voltage needle.

[0038] 5. Exhaust duct. Detailed Implementation

[0039] The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0040] Example 1

[0041] like Figures 1 to 5 As shown, a multi-roof side-by-side painting booth includes...

[0042] The roof assembly and two side panels 22 are located on both sides below the roof assembly and form a powder spraying cavity with the roof assembly. The panel strip 1 moves below the powder spraying cavity.

[0043] The roof assembly includes multiple roof panels 21, each of which is arranged above the powder spraying chamber along the moving direction of the strip 1, and a top air intake channel is formed between adjacent roof panels 21; a front air intake channel is formed between the foremost roof panel 21 and the strip 1, and the last roof panel 21 is connected to the exhaust system.

[0044] Each top plate 21 is fixedly provided with an air blowing pipe 3 on its outer end edge. The air blowing pipe 3 has multiple air blowing holes, which are adapted to blow air toward the lower surface and / or upper surface of the top plate 21. The air blowing holes are located between two adjacent spray guns 4.

[0045] Multiple spray guns 4 are respectively installed in each top inlet, and the spray guns 4 are adapted to spray powder into the powder spraying chamber.

[0046] Finally, the tail of the side roof 21 is bent to form the exhaust pipe 5, which is connected to the exhaust system. The exhaust system is not described in this embodiment, and can be referred to the structure described in the previous patent.

[0047] Figure 2 is a schematic view of the blowing pipe 3 blowing the upper surface of the roof 21;

[0048] Figure 3 is a schematic view of the blowing pipe 3 blowing the lower surface of the roof 21;

[0049] The blowing hole can also blow the upper surface and the lower surface at the same time.

[0050] Specifically, as an optional embodiment in this embodiment, as shown in Figure 1 , each roof 21 is arranged in an inclined manner;

[0051] The inclined top air inlet channel is formed between adjacent roofs 21.

[0052] In this embodiment, the frontmost roof 21 can be arranged horizontally, and the inclination direction of the frontmost roof 21 can be the same as or opposite to the inclination direction of the several rear roofs 21.

[0053] As shown in Figure 6 , the assembly structure between the roof and the side plate is:

[0054] A plurality of insertion slots are formed in the upper end of the side plate 21, the insertion slots are inclined, and the end of the roof 21 is inserted into the insertion slot, so that the roof 21 is arranged inclined on the side plate 22.

[0055] Specifically, as an optional embodiment in this embodiment, as shown in Figure 5 , the spray gun 4 comprises

[0056] The spray gun head 41 is in a tubular structure;

[0057] The blowing capillary tube 42 is arranged in the spray gun head 41; and

[0058] The high-voltage electric needle 43 is arranged in the blowing capillary tube 42.

[0059] Regarding the spray gun 4, it is a commercially available product, and its structure and principle are not described in detail.

[0060] In this embodiment, the spray gun 4 is tilted in the direction of movement of the strip 1. The tilting direction of the spray gun 4 is consistent with the tilting direction of the top plate 21. In this embodiment, the spray guns 4 arranged in the top air inlet channel form a row, and each spray gun 4 is independently connected to a Venturi pump. Fluidized powder is delivered into the spray gun 4 through a hose, and each spray gun head 41 is equipped with a high-voltage electrostatic needle. A large airflow is blown out from the needle through the air-blowing capillary tube 42 surrounding the needle. The purpose of blowing air is to prevent powder accumulation on the needle. The spray gun head 41 is a circular powder outlet tube, and there is no need to install a nozzle blocking component, allowing the powder to be sprayed directly forward.

[0061] In the coating booth of this embodiment, the number of spray guns 4 depends on the width of the conveyor belt, the required coating thickness, and the conveyor belt's running speed, etc. Typically, it is 2-10 rows, which is the number of top air intake channels. For example, at a linear velocity of 100 meters per minute, 3-6 rows of spray guns 4 can be installed. As the linear velocity decreases or increases, the number of rows decreases or increases accordingly.

[0062] The distance between the two rows of spray guns 4 should be approximately 20-60 cm, preferably 25-30 cm.

[0063] In this embodiment, the top plate 21 is made of plastic strip, and the side plates 22 on both sides are made of antistatic plastic, including but not limited to common materials such as polypropylene plate, polyvinyl chloride plate and polytetrafluoroethylene plate, etc.

[0064] The air blowing pipe 3 is fixedly installed on the outer end of the top plate 21. Multiple air blowing holes are opened on the air blowing pipe 3. The air blowing holes blow air onto the surface of the top plate 21, which can be the upper surface or the lower surface. By blowing air, powder accumulation on each top plate 21 is prevented, thereby solving the problem that the powder accumulation at the top of the powder spraying chamber affects the powder application quality of the plate belt 1.

[0065] In this embodiment, the strip 1 is a steel strip, aluminum strip, or stainless steel strip, etc.

[0066] Example 2

[0067] This embodiment is based on Embodiment 1, with the difference being that, as Figure 7 As shown, in the painting spray booth of this embodiment, each top plate 21 is arranged horizontally, and each top plate 21 forms a stepped structure; a horizontal top air intake channel is formed between adjacent top plates 21.

[0068] When the spray gun 4 is installed in the top air intake channel, it is set at an angle to facilitate the movement of powder toward the belt 1.

[0069] The coating spray room of the present application has a fixed back plate 23 under the plate strip 1, which is closely attached to the side plates 22 of the spray room. One or several air blowing pipes 3 can be installed in the middle of the back plate 23 to ensure a positive pressure between the plate strip 1 and the back plate 23, and to ensure that air flows continuously into the spray room from the side plates 22 close to the plate strip 1, so as to prevent dust in the spray room from overflowing. The fat edges of the plate strip 1 can also be prevented by adjusting the distance between the moving side plates 22 and the plate strip and the air pressure of the back plate 23.

[0070] During the spraying production, the negative pressure of the air extraction system is adjusted to ensure that the moving speed of the air flow in the spray room is close to the moving speed of the plate strip 1. In the case that there is no obvious relative movement between the two, the powder application rate is the highest. No matter how fast the plate strip is, as long as the moving speed of the dust in the spray room is the same, the powder application will not be affected. Thus, the problem of difficult powder application on high-speed plate strips during coating is completely solved.

[0071] During the use of the coating spray room of the present application, the plate strip 1 moves from below the powder spraying cavity. According to the requirements of the site and the actual situation, the coating equipment can be installed obliquely, vertically, or even turned over by more than 90° or 180°.

[0072] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A multi-roof side-by-side painting spray booth, characterized in that, The housing assembly and two side plates are arranged below the housing assembly and form a powder spraying chamber between the housing assembly and the two side plates, and the coated plate belt moves below the powder spraying chamber. The housing assembly comprises a plurality of top plates, each of which is arranged along the moving direction of the plate belt above the powder spraying chamber, and a top blowing gas passage is formed between adjacent top plates; the front end of the top plate and the plate belt form a front end air inlet passage, and the last end of the top plate is connected to an exhaust system. An air blowing pipe is fixedly arranged on the outer side edge of each top plate, a plurality of air blowing holes are formed in the air blowing pipe, the air blowing holes are adapted to blow air towards the lower surface and / or the upper surface of the top plate, and the air blowing holes are located between two adjacent air guns. A plurality of air guns are arranged in each top inlet, and the air guns are adapted to spray powder into the powder spraying chamber. The top plate is arranged in a horizontal manner, and each top plate forms a stepped structure. A horizontal top air inlet passage is formed between adjacent top plates. The air gun is inclined towards the moving direction of the plate belt.

2. The multi-top-plate side-by-side coating spraying house according to claim 1, wherein the air gun comprises an air gun head in a tubular structure; an air blowing capillary tube arranged in the air gun head; and a high-voltage electric needle arranged in the air blowing capillary tube. ​ ​

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