Powder room system of powder coating line

Abstract

The invention relates to a powder room system of a powder coating line. The powder room system of the powder coating line comprises a powder supply box, a powder room processing chamber, a powder spraying device, a cyclone recovery device and a post-stage recovery device. The powder supply box is connected with the powder spraying device; the cyclone recovery device is connected with the powder room processing chamber; the post-stage recovery device is connected with the cyclone recovery device; the cyclone recovery device is connected with the powder supply box; the cyclone recovery device comprises a double-cyclone recoverer, the double-cyclone recoverer comprises a straight cylinder and a conical cylinder connected with the straight cylinder, the double-cyclone recoverer further comprises a gas rising pipe, and the gas rising pipe is a horn-shaped pipe fitting; and a hinge door is arranged on a conical cylinder of the double-cyclone recoverer. Compared with the prior art, the double-cyclone recoverer has the advantages that the riser is trumpet-shaped, so that fine powder with small particle size and light weight can be recovered; and a hinge door is arranged on the conical barrel of the double-cyclone recoverer, so that the interior is convenient to clean after the conical barrel is opened, and cross contamination during color changing is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of powder coating, and particularly to a powder booth system for a powder coating line. Background Art

[0002] Powder coating is a new process in surface coating technology. It is a coating process that coats and forms a coating film in the form of powder. The powder coating does not contain solvents and has the characteristics of no solvent, no pollution, energy and resource saving, reduction of labor intensity, and high mechanical strength of the coating film.

[0003] In the existing powder booth system, a large cyclone collector is usually used for recycling. For example, CN107042183A discloses a cyclone recovery filtration plastic powder booth for coating, including a plastic powder spraying system and a large cyclone recovery system. However, the recovery rate of the large cyclone structure is relatively low, especially it is difficult to recover fine powders with small particle size and small mass, and the internal structure is difficult to clean, and cross-contamination is likely to occur during color change.

[0004] Therefore, there is an urgent need for a powder booth system that can solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a powder booth system for a powder coating line to overcome the defects of the existing technology. In the present solution, the riser pipe of the double cyclone collector is trumpet-shaped, which is beneficial to throwing the powder in the upward rotating airflow inside again and entering the downward rotating airflow outside, and is beneficial to recovering fine powders with small particle size and small mass; a hinge door is provided on the conical cylinder of the double cyclone collector, which is convenient for cleaning the inside after opening and avoiding cross-contamination during color change.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The purpose of the present invention is to provide a powder booth system for a powder coating line. The powder booth system of the powder coating line includes a powder supply tank, a powder booth processing chamber, a powder spraying device, a cyclone recovery device, and a post-stage recovery device; the powder supply tank is connected to the powder spraying device; the cyclone recovery device is connected to the powder booth processing chamber; the post-stage recovery device is connected to the cyclone recovery device; the cyclone recovery device is connected to the powder supply tank; the cyclone recovery device includes a double cyclone collector, the double cyclone collector includes a straight cylinder and a conical cylinder connected to the straight cylinder, the double cyclone collector further includes a riser pipe, and the riser pipe is a trumpet-shaped pipe fitting; a hinge door is provided on the conical cylinder of the double cyclone collector.

[0008] Furthermore, the double cyclone collector further includes an air inlet and an air outlet; the air inlet is provided on the side wall of the straight cylinder; the air outlet is provided on the top of the straight cylinder; the air outlet is communicated with the riser pipe.

[0009] Further, the air inlet is connected to the powder supply tank; the air outlet is connected to the post-stage recovery device.

[0010] Further, the diameter of the riser pipe gradually decreases from bottom to top.

[0011] Further, the powder spraying device includes a spray gun; the spray gun is connected to the powder supply tank through a powder inlet pipe; the spray guns are arranged on both sides of the powder room processing chamber, and the workpiece is located between the spray guns on both sides.

[0012] Further, the powder spraying device further includes a lift; the spray gun is connected to the lift.

[0013] Further, the cyclone recovery device is connected to the powder room processing chamber through a pipeline; the post-stage recovery device is connected to the cyclone recovery device through a pipeline; the cyclone recovery device is connected to the powder supply tank through a pipeline.

[0014] Further, the conical cylinder includes multiple conical cylinder segments; the multiple conical cylinder segments are connected in sequence; adjacent conical cylinder segments are connected by fasteners.

[0015] Further, the cyclone recovery device further includes a powder collecting chamber; the powder collecting chamber is communicated with the bottom of the conical cylinder; the powder collecting chamber is connected to the powder supply tank.

[0016] Further, the post-stage recovery device includes a fan and a post-stage recovery chamber; the fan is arranged in the post-stage recovery chamber, and the fan is used to ensure a certain negative pressure at the opening of the powder room system to avoid powder overflow.

[0017] Further, the spray gun is a high-voltage ion spray gun.

[0018] Further, a powder suction fan is arranged at the bottom of the double cyclone recovery device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) In the powder room system of the powder coating line provided by the present invention, the riser pipe of the double cyclone recovery device is in a trumpet shape, which is beneficial to throwing the powder in the internal rotating upward air flow out again and entering the external rotating downward air flow, and is beneficial to recovering fine powder with small particle size and small mass;

[0021] 2) In the powder room system of the powder coating line provided by the present invention, a hinge door is arranged on the conical cylinder of the double cyclone recovery device, which is convenient for cleaning the inside after opening and avoids cross-contamination during color change. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the powder room system of the powder coating line in the embodiment of the present invention.

[0023] Figure 2Cross-sectional schematic view of a double-cyclone collector of a powder booth system in an embodiment of the present invention (showing part of the pipes connected to the air inlet and air outlet).

[0024] Wherein:

[0025] 1. Powder supply tank, 2. Powder booth processing chamber, 3. Powder spraying device, 31. Spray gun, 32. Lift, 4. Cyclone recovery device, 41. Double-cyclone collector, 411. Straight cylinder, 412. Cone cylinder, 413. Updraft pipe, 414. Hinge door, 415. Air inlet, 416. Air outlet, 5. Post-stage recovery device, 51. Post-stage recovery chamber. Specific embodiments

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Features such as component models, material names, and connection structures not clearly described in this technical solution are regarded as common technical features disclosed in the prior art.

[0027] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that in the present invention, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0029] Embodiment

[0030] As Figures 1-2 shown, in this embodiment, a powder booth system of a powder coating line is provided. The powder booth system of the powder coating line includes a powder supply tank 1, a powder booth processing chamber 2, a powder spraying device 3, a cyclone recovery device 4, and a post-stage recovery device 5.

[0031] The cyclone recovery device 4 is connected to the powder processing chamber 2 through a pipeline; the post-stage recovery device 5 is connected to the cyclone recovery device 4 through a pipeline; the cyclone recovery device 4 is connected to the powder supply tank 1 through a pipeline.

[0032] The powder spraying device 3 includes a spray gun 31 and a lift 32; the spray gun 31 is connected to the powder supply tank 1 through a powder inlet pipe; the spray gun 31 is arranged on both sides of the powder processing chamber 2, and vertical openings are provided on both sides of the powder processing chamber 2 to enable the spray gun 31 to extend into the powder processing chamber 2, and the spray gun 31 can move up and down; the workpiece is located between the spray guns 31 on both sides; the spray gun 31 is connected to the lift 32, and the lift is used to control the up and down movement of the spray gun 31.

[0033] The cyclone recovery device 4 includes a double cyclone recovery device 41. The double cyclone recovery device 41 includes a straight cylinder 411 and a conical cylinder 412 connected to the straight cylinder 411. The double cyclone recovery device 41 further includes a riser pipe 413. The riser pipe 413 is a trumpet-shaped pipe fitting, and the diameter of the riser pipe 413 gradually decreases from bottom to top. The riser pipe 413 is arranged inside the straight cylinder 411. The powder rotates on the outer layer and gradually descends along with the air flow. After reaching the lower part, the coarse powder enters the powder collection chamber 42 from the bottom. The gas carrying the fine powder forms an inner swirling air flow in the middle and gradually rises, and is discharged by the riser pipe 413. The riser pipe 413 is set as a trumpet-shaped pipe fitting, and the diameter of the inner swirling upward cyclone decreases. The centrifugal force of the fine powder in the inner swirling upward air flow is greater, and the fine powder therein is thrown out and enters the outer rotating downward air flow; a hinge door 414 is provided on the conical cylinder 412 of the double cyclone recovery device 41; the double cyclone recovery device 41 further includes an air inlet 415 and an air outlet 416; the air inlet 415 is arranged on the side wall of the straight cylinder 411; the air outlet 416 is arranged on the top of the straight cylinder 411; the air outlet 416 is communicated with the riser pipe 413; the air inlet 415 is connected to the powder supply tank 1; the air outlet 416 is connected to the post-stage recovery device 5.

[0034] The conical cylinder 412 includes two conical cylinder sections; the two conical cylinder sections are connected in sequence; the adjacent conical cylinder sections are connected by fasteners, and the fasteners can be conventional fasteners, such as high-strength bolts, etc.

[0035] The cyclone recovery device 4 further includes a powder collection chamber 42; the powder collection chamber 42 is communicated with the bottom of the conical cylinder 412 of the double cyclone recovery device 41; the powder collection chamber 42 is connected to the powder supply tank 1 through a pipeline to return the recovered powder into the powder supply tank 1.

[0036] The post-stage recovery device 5 includes a fan and a post-stage recovery chamber 51; the fan is arranged in the post-stage recovery chamber 51, and the fan is used to ensure a certain negative pressure of 0.7 m / sec at the opening of the powder room system to avoid powder overflow; the post-stage recovery chamber 51 is connected to the air outlet 416 through a pipeline.

[0037] The spray gun 31 is a high-voltage ion spray gun 31.

[0038] A powder suction fan is provided at the bottom of the double cyclone collector 41.

[0039] The working method of the powder booth system of the above powder coating line is as follows:

[0040] The workpiece to be sprayed is fixed by other external lifting equipment and enters the powder booth processing chamber 2. The lift 32 controls the position of the spray gun 31. The powder comes from the powder supply tank 1. The spray gun 31 sprays powder. The remaining sprayed powder is sucked in by the cyclone recovery device 4 and separated from the air. The separated sprayed powder is deposited in the powder collection chamber 42 and then sent back to the powder supply tank 1. The separated air is discharged after entering the post-stage recovery device 5.

[0041] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A powder room system for a powder coating line, characterized in that, The powder room system of the powder coating line includes a powder supply tank (1), a powder room processing chamber (2), a powder spraying device (3), a cyclone recovery device (4), and a post-stage recovery device (5); The powder supply tank (1) is connected to the powder spraying device (3); The cyclone recovery device (4) is connected to the powder room processing chamber (2); The post-stage recovery device (5) is connected to the cyclone recovery device (4); The cyclone recovery device (4) is connected to the powder supply tank (1); The cyclone recovery device (4) includes a double cyclone recovery unit (41). The double cyclone recovery unit (41) includes a straight cylinder (411) and a conical cylinder (412) connected to the straight cylinder (411). The double cyclone recovery unit (41) further includes a riser pipe (413), and the riser pipe (413) is a flared pipe fitting; A hinge door (414) is provided on the conical cylinder (412) of the double cyclone recovery unit (41).

2. The powder booth system of a powder coating line according to claim 1, characterized in that The double cyclone recovery unit (41) further includes an air inlet (415) and an air outlet (416); The air inlet (415) is provided on the side wall of the straight cylinder (411); The air outlet (416) is provided at the top of the straight cylinder (411); The air outlet (416) is communicated with the riser pipe (413).

3. The powder booth system of a powder coating line according to claim 2, characterized in that, The air inlet (415) is connected to the powder supply tank (1); The air outlet (416) is connected to the post-stage recovery device (5).

4. The powder booth system of a powder coating line according to claim 1, characterized in that, The diameter of the riser pipe (413) gradually decreases from bottom to top.

5. The powder booth system of a powder coating line according to claim 1, characterized in that, The powder spraying device (3) includes a spray gun (31); The spray gun (31) is connected to the powder supply tank (1) through a powder inlet pipe; The spray gun (31) is arranged on both sides of the powder room processing chamber (2), and the workpiece is located between the spray guns (31) on both sides.

6. The powder booth system of a powder coating line according to claim 5, characterized in that, The powder spraying device (3) further includes a lift (32); The spray gun (31) is connected to the lift (32).

7. The powder booth system of a powder coating line according to claim 1, characterized in that, The cyclone recovery device (4) is connected to the powder room processing chamber (2) through a pipeline; The post-stage recovery device (5) is connected to the cyclone recovery device (4) through a pipeline; The cyclone recovery device (4) is connected to the powder supply tank (1) through a pipeline.

8. The powder booth system of a powder coating line according to claim 1, characterized in that, The conical cylinder (412) includes multiple conical cylinder segments; The multiple conical cylinder segments are connected in sequence; Adjacent conical cylinder segments are connected by fasteners.

9. The powder booth system of a powder coating line according to claim 1, characterized in that, The cyclone recovery device (4) further includes a powder collection chamber (42); The powder collection chamber (42) is communicated with the bottom of the conical cylinder (412); The powder collection chamber (42) is connected to the powder supply tank (1).

10. The powder booth system of a powder coating line according to claim 1, characterized in that, The post-stage recovery device (5) includes a fan and a post-stage recovery chamber (51); The fan is arranged in the post-stage recovery chamber (51).

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