A powder recovery device

Abstract

The utility model provides a powder recovery device, which belongs to the field of mechanical technology. It solves the problems of slow recovery speed and low efficiency in the prior art. The powder recovery device is characterized in that it includes a negative pressure fan 1, a channel 1, a recovery tube 1, a negative pressure fan 2, a channel 2 and a recovery tube 2, wherein the negative pressure fan 1 is connected to the left end of the channel 1 and the left end of the channel 1 can be connected to the powder spraying room, the right end of the channel 1 is connected to the upper end side of the recovery tube 1 along the tangent direction of the recovery tube 1, the left end of the channel 2 is connected to the upper end of the recovery tube 1 and the negative pressure fan 2 is connected to the left end of the channel 2. It has the advantages of fast powder separation speed, high efficiency, good separation effect, improved overall recovery rate of powder, and reduced resource waste and environmental pollution.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a powder recovery device. Background Art

[0002] Powder coating is a new type of solvent-free 100% solid powder coating, which has the characteristics of being solvent-free, pollution-free, recyclable, environmentally friendly, energy and resource saving, and having high mechanical strength of the coating film.

[0003] Powder spraying is generally carried out in a spraying room. Powder coating is sprayed onto the surface of the workpiece with powder spraying equipment. Under the action of static electricity, the powder will be evenly adsorbed on the surface of the workpiece to form a powdery coating. The powdery coating is leveled and solidified through high-temperature baking to become the final coating with different effects. The spraying effect of powder spraying is superior to that of the painting process in terms of mechanical strength, adhesion, corrosion resistance, and aging resistance.

[0004] When powder spraying is carried out in the spray chamber, part of the powder will not be adsorbed on the surface of the workpiece, but will float in the air. If it is not recovered for a long time, it will cause pollution and waste. In order to recycle these scattered powders, it is necessary to connect a powder recovery device to the spray chamber. The traditional powder recovery device absorbs the powder into a storage tank for static recovery. This recovery method requires a long waiting time for the powder to settle in the storage tank, and the recovery efficiency is low. Utility Model Content

[0005] The utility model aims to provide a powder recovery device with high recovery efficiency in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A powder recovery device, characterized in that it includes a negative pressure fan 1, a channel 1, a recovery tube 1, a negative pressure fan 2, a channel 2 and a recovery tube 2, wherein the negative pressure fan 1 is connected to the left end of the channel 1 and the left end of the channel 1 can be connected to the powder spraying room, the right end of the channel 1 is connected to the upper end side of the recovery tube 1 along the tangential direction of the recovery tube 1, the left end of the channel 2 is connected to the upper end of the recovery tube 1 and the negative pressure fan 2 is connected to the left end of the channel 2, and the right end of the channel 2 is connected to the upper end side of the recovery tube 2 along the tangential direction of the recovery tube 2.

[0008] The present powder recovery device is used for recovering excess powder in a powder-to-powder spraying room. The air flow is guided by negative pressure fans 1 and 2 to accelerate the speed at which the air mixed with powder enters recovery tube 1 and recovery tube 2. The conveying pipe 1 and recovery tube 1, as well as the conveying pipe 2 and recovery tube 2 are tangently arranged, and the upper inner parts of the recovery tube 1 and the recovery tube 2 are annular cavity structures, so that the air mixed with powder generates a rotational motion after entering the corresponding recovery tube, so that the powder can settle to the bottom of the tube along the tube wall under the action of centrifugal force. The powder settling speed is fast, and the air mixed with powder is subjected to the sedimentation and separation effects twice by the recovery tube 1 and the recovery tube 2, so that the powder recovery efficiency is higher and the separation of powder and air is more thorough.

[0009] When the powder recovery device is working, the negative pressure fan 1 sucks the air mixed with powder in the spraying room into the channel 1 and transports it to the recovery tube 1 through the channel 1. The air mixed with powder generates a rotational motion after entering the recovery tube 1. Most of the powder is thrown onto the tube wall under the action of centrifugal force and then settles down to the bottom of the recovery tube 1, while the air containing trace powder can be output from the upper part of the recovery tube 1. Then, the negative pressure fan 2 is started to suck it into the channel 2 and transport it to the recovery tube 2 through the channel 2. The air containing trace powder generates a rotational motion after entering the recovery tube 2. The trace powder settles to the bottom of the recovery tube 2 under the action of centrifugal force, while the separated clean air can be discharged from the upper part of the recovery tube 2, thereby achieving the purpose of powder recovery.

[0010] In the above-mentioned powder recovery device, the recovery tube one is cylindrical with an internal cavity, and a filter is axially arranged inside the recovery tube one. The filter is arranged on the same axis as the recovery tube and the upper end of the filter passes through the upper end surface of the recovery tube one. The left end of the above-mentioned channel two is connected to the upper end of the filter.

[0011] The filter is located at the middle upper part of the recovery cylinder 1, so that the air entering the recovery cylinder 1 through the channel 1 rotates around the filter, and the powder is thrown onto the side wall of the recovery cylinder under the centrifugal force of the rotating airflow, and then settles to the bottom of the recovery cylinder 1 under the action of gravity, while the air can be filtered by the filter and then discharged upward.

[0012] In the above-mentioned powder recovery device, the second recovery tube is cylindrical with an internal cavity, and a filter is axially arranged inside the second recovery tube. The filter is arranged coaxially with the second recovery tube and the upper end of the filter passes through the upper end surface of the second recovery tube.

[0013] The structure and function of the recovery tube 2 and the filter are the same as those of the recovery tube 1. The air mixed with powder is settled once in the recovery tube 1 and then settled a second time in the recovery tube 2, which improves the separation effect of powder and air, improves the powder recovery efficiency, and ensures the cleanliness of the exhausted air to reduce environmental pollution.

[0014] The above-mentioned powder recovery device also includes an air outlet hood, which is connected to the second upper end of the recovery cylinder.

[0015] The air in the second recovery tube is filtered by the filter and then discharged from the air outlet cover. At the same time, the air outlet cover can prevent impurities in the external environment from entering the filter and the second recovery tube.

[0016] In the above-mentioned powder recovery device, the filter is cylindrical, a plurality of filter holes are provided on the lower end surface and the lower end side wall of the filter, and a screen is provided at the upper end of the filter.

[0017] When the air is discharged upward from the filter, it is filtered once by the filter holes and then filtered twice by the screen, which can further separate the powder in the air and improve the recovery efficiency.

[0018] The powder recovery device further comprises a support frame, wherein the number of the support frames is two, and the recovery cylinder 1 and the recovery cylinder 2 are respectively connected to the two support frames.

[0019] The support frame supports the first recycling tube and the second recycling tube, so that the first recycling tube and the second recycling tube are stably positioned while having a gap between them and the ground.

[0020] In the above-mentioned powder recovery device, a discharge hopper is disposed at the lower end of the recovery tube 1 and the recovery tube 2, and a valve is disposed at the lower end of the discharge hopper.

[0021] The two discharge hoppers are connected with the corresponding recovery barrel 1 and recovery barrel 2, and the settled powder can fall into the discharge hopper. The recovered powder can be output from the discharge hopper by opening the valve, so as to facilitate the subsequent treatment or reuse of the powder.

[0022] In the above-mentioned powder recovery device, the filter and the first recovery tube, as well as the filter and the second recovery tube are connected via threads.

[0023] The threaded connection makes the filter easy to load and unload, and the filter can be easily removed for cleaning or replacement, thus preventing the filter holes or screen from being clogged by powders during long-term use and affecting work.

[0024] In the above-mentioned powder recovery device, the air outlet hood and the second recovery tube are connected by buckling.

[0025] The snap-fit ​​connection makes it easy to install and remove the air hood, to disassemble the air hood for cleaning, and to install and remove the filter.

[0026] In the above-mentioned powder recovery device, the mesh number of the sieve is greater than the mesh number of the filter hole.

[0027] The aperture of the mesh is smaller than that of the filter hole. When the air is discharged upward through the filter, it is filtered by the filter hole and filtered twice by the mesh in sequence, thereby enhancing the effect of separating the air and the powder.

[0028] Compared with the prior art, the powder recovery device utilizes the centrifugal force principle and two recovery processes to enable the powder to be quickly separated in the recovery tube one and then quickly separated again in the recovery tube two, effectively improving the separation speed and efficiency, thereby improving the overall powder recovery rate; the air flow is driven by the negative pressure fan one and the negative pressure fan two to promote the air mixed with powder to enter the separation and recovery process, so that the device can operate continuously; the setting of the filter promotes the rotational movement of the airflow on the one hand, and further filters and separates the powder in the airflow on the other hand, ensuring the cleanliness of the final exhaust air and reducing environmental pollution; the setting of the discharge hopper and the valve facilitates the output of the recovered powder for processing or reuse, and the threaded connection of the filter and the snap-fit ​​connection of the air outlet hood are both convenient for loading and unloading, and convenient for disassembling the corresponding parts for cleaning or replacement, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a partial cross-sectional structural schematic diagram of the powder recovery device;

[0030] Figure 2 It is a top view of the recovery cylinder 1 in the powder recovery device;

[0031] Figure 3 It is a schematic diagram of the structure of the filter in the powder recovery device.

[0032] In the figure, 1. negative pressure fan 1; 2. channel 1; 3. negative pressure fan 2; 4. channel 2; 5. air outlet hood; 6. filter; 7. recovery cylinder 2; 8. discharge hopper; 9. support frame; 10. valve; 11. recovery cylinder 1; 12. screen; 13. filter hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0036] like Figure 1 As shown in FIG. 3 , the powder recovery device includes a negative pressure fan 1, a channel 2, a recovery cylinder 11, a negative pressure fan 23, a channel 24 and a recovery cylinder 27, the negative pressure fan 1 is connected to the left end of the channel 2 and the left end of the channel 2 can be connected to the powder spraying room, the right end of the channel 2 is connected to the upper end side of the recovery cylinder 11 along the tangent direction of the recovery cylinder 11, the left end of the channel 24 is connected to the upper end of the recovery cylinder 11 and the negative pressure fan 23 is connected to the left end of the channel 24, and the right end of the channel 24 is connected to the upper end side of the recovery cylinder 27 along the tangent direction of the recovery cylinder 27.

[0037] The recovery tube 11 is cylindrical with an internal cavity, and a filter 6 is axially arranged inside the recovery tube 11. The filter 6 is arranged coaxially with the recovery tube 11 and the upper end of the filter 6 passes through the upper end surface of the recovery tube 11. The left end of the above-mentioned channel 2 4 is connected to the upper end of the filter 6.

[0038] The recovery tube 2 7 is cylindrical with an internal cavity. A filter 6 is axially arranged in the recovery tube 2 7 . The filter 6 is arranged coaxially with the recovery tube 2 7 , and the upper end of the filter 6 passes through the upper end surface of the recovery tube 2 7 .

[0039] It also includes an air outlet cover 5, which is connected to the upper end of the recovery tube 2 7.

[0040] The filter 6 is cylindrical, and a plurality of filter holes 13 are provided on the lower end surface and the lower end side wall of the filter 6 . A screen 12 is provided at the upper end of the filter 6 .

[0041] It also includes a support frame 9, and the number of the support frames 9 is two. The above-mentioned recovery tube 1 11 and recovery tube 2 7 are connected to the two support frames 9 respectively.

[0042] A discharge hopper 8 is disposed at the lower end of the recovery tube 1 11 and the recovery tube 2 7 , and a valve 10 is disposed at the lower end of the discharge hopper 8 .

[0043] The filter 6 and the recovery tube 1 11 as well as the filter 6 and the recovery tube 2 7 are connected via threads.

[0044] The air outlet cover 5 and the recovery tube 2 7 are connected by buckling.

[0045] The mesh number of the sieve 12 is greater than the mesh number of the filter hole 13 .

[0046] The present powder recovery device is used to recover excess powder in a powder-to-powder spraying room. The air flow is guided by negative pressure fan 1 and negative pressure fan 2 3 to accelerate the speed at which the air mixed with powder enters the recovery cylinder 11 and the recovery cylinder 2 7. The conveying pipe 1 and the recovery cylinder 11, the conveying pipe 2 and the recovery cylinder 2 7 are tangently arranged, and the upper inner parts of the recovery cylinder 11 and the recovery cylinder 2 7 are annular cavity structures, so that the air mixed with powder generates a rotational motion after entering the corresponding recovery cylinder, so that the powder can settle to the bottom of the cylinder along the cylinder wall under the action of centrifugal force, and the powder settling speed is fast. In addition, the air mixed with powder passes through the recovery cylinder 11 and the recovery cylinder 2 7 for two sedimentation and separation actions, so that the powder recovery efficiency is higher and the separation of powder and air is more thorough.

[0047] When the powder recovery device is working, the negative pressure fan 1 sucks the air mixed with powder in the spraying room into the channel 2 and transports it to the recovery cylinder 11 through the channel 2. The air mixed with powder generates a rotation motion after entering the recovery cylinder 11. Most of the powder is thrown onto the cylinder wall under the action of centrifugal force and then settles down to the bottom of the recovery cylinder 11, while the air containing trace powder can be output from the upper part of the recovery cylinder 11. Then, the negative pressure fan 23 is started to suck it into the channel 24 and transport it to the recovery cylinder 27 through the channel 24. The air containing trace powder generates a rotation motion after entering the recovery cylinder 27. The trace powder settles to the bottom of the recovery cylinder 27 under the action of centrifugal force, while the separated clean air can be discharged from the upper part of the recovery cylinder 27, thereby achieving the purpose of powder recovery.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A powder recovery device, characterized in that: It includes a negative pressure fan 1, a channel 1, a recovery tube 1, a negative pressure fan 2, a channel 2 and a recovery tube 2, wherein the negative pressure fan 1 is connected to the left end of the channel 1 and the left end of the channel 1 can be connected to the powder spraying room, the right end of the channel 1 is connected to the upper end side of the recovery tube 1 along the tangent direction of the recovery tube 1, the left end of the channel 2 is connected to the upper end of the recovery tube 1 and the negative pressure fan 2 is connected to the left end of the channel 2, and the right end of the channel 2 is connected to the upper end side of the recovery tube 2 along the tangent direction of the recovery tube 2.

2. The powder recovery device according to claim 1, characterized in that: The recovery tube 1 is cylindrical with an internal cavity. A filter is axially arranged inside the recovery tube 1. The filter is arranged on the same axis as the recovery tube and the upper end of the filter passes through the upper end surface of the recovery tube 1. The left end of the above-mentioned channel 2 is connected to the upper end of the filter.

3. The powder recovery device according to claim 2, characterized in that: The second recovery tube is cylindrical with an internal cavity. A filter is axially arranged inside the second recovery tube. The filter is arranged coaxially with the second recovery tube and the upper end of the filter passes through the upper end surface of the second recovery tube.

4. The powder recovery device according to claim 3, characterized in that: It also includes an air outlet cover, which is connected to the second upper end of the recovery tube.

5. The powder recovery device according to claim 4, characterized in that: The filter is cylindrical, a plurality of filter holes are provided on the lower end surface and the lower end side wall of the filter, and a screen is provided at the upper end of the filter.

6. The powder recovery device according to claim 5, characterized in that: It also includes two support frames, and the recovery tube 1 and the recovery tube 2 are respectively connected to the two support frames.

7. The powder recovery device according to claim 6, characterized in that: The lower ends of the recovery tube 1 and the recovery tube 2 are both provided with a discharge hopper, and the lower end of the discharge hopper is provided with a valve.

8. The powder recovery device according to claim 7, characterized in that: The filter and the first recovery tube, as well as the filter and the second recovery tube are connected via threads.

9. The powder recovery device according to claim 8, characterized in that: The air outlet cover is buckled and connected with the second recovery tube.

10. The powder recovery device according to claim 9, characterized in that: The mesh number of the sieve mesh is greater than the mesh number of the filter hole.

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