阅读说明：本技术 一种粉末静电喷涂系统的粉末回收供给装置 (Powder recycling and supplying device of electrostatic powder spraying system ) 是由 张卫 李绮屏 于 2019-12-09 设计创作，主要内容包括：本发明提供一种粉末静电喷涂系统的粉末回收供给装置,包括：回收管路、混料单元、补料单元及供料管路,混料单元包括第一振动筛、第二振动筛及供料箱,回收管路的两端分别与粉末静电喷涂系统的喷房、第一振动筛的入口相连通,回收管路上设有旋风回收器,补料单元与第二振动筛的入口连通,第一振动筛的出口与第二振动筛的出口均与供料箱连通,供料管的两端分别与供料箱、粉末静电喷涂系统的喷房中的喷粉喷枪连通。本发明通过设置第一振动筛和第二振动筛分别对旧粉末及新粉末进行过筛,能有效避免出现旧粉末与新粉末在同一振动筛中同时过筛相吸结团将振动筛堵死的情况,保证粉末顺利供应,使粉末静电喷涂作业正常进行,提高生产效率并降低生产成本。(The invention provides a powder recovery and supply device of an electrostatic powder coating system, comprising: the recycling line, the compounding unit, material supplementing unit and feed pipeline, the compounding unit includes first shale shaker, second shale shaker and feed tank, the both ends of recycling line respectively with powder electrostatic spraying system's the room that spouts, the entry of first shale shaker is linked together, be equipped with cyclone on the recycling line, the entry intercommunication of material supplementing unit and second shale shaker, the export of first shale shaker and the export of second shale shaker all communicate with the feed tank, the both ends of feed pipe respectively with the feed tank, the spray gun intercommunication of dusting in powder electrostatic spraying system's the room. According to the electrostatic spraying device, the first vibrating screen and the second vibrating screen are arranged to sieve the old powder and the new powder respectively, so that the situation that the old powder and the new powder are sieved in the same vibrating screen at the same time and are agglomerated to block the vibrating screen can be effectively avoided, smooth supply of the powder is ensured, the electrostatic spraying operation of the powder is normally carried out, the production efficiency is improved, and the production cost is reduced.)

1. A powder recovery and supply device of an electrostatic powder coating system, comprising: the powder spraying device comprises a recovery pipeline, a cyclone recoverer, a mixing unit, a material supplementing unit and a feeding pipe, wherein the mixing unit comprises a first vibrating screen, a second vibrating screen and a feeding box, the first end of the recovery pipeline is communicated with a spraying room of the powder electrostatic spraying system, the second end of the recovery pipeline is communicated with an inlet of the first vibrating screen, the cyclone recoverer is communicated with the recovery pipeline, the material supplementing unit is communicated with an inlet of the second vibrating screen, an outlet of the first vibrating screen and an outlet of the second vibrating screen are communicated with the feeding box, the first end of the feeding pipe is communicated with the feeding box, and the other end of the feeding pipe is communicated with a powder spraying gun in the spraying room of the powder electrostatic spraying system.

2. The powder recycling and feeding apparatus of an electrostatic powder coating system according to claim 1, wherein the first vibrating screen is grounded.

3. The powder recycling and supplying device of the electrostatic powder spraying system according to claim 1, wherein the replenishing unit comprises a replenishing pipe and a replenishing device, a first end of the replenishing pipe is communicated with the replenishing device, and a second end of the replenishing pipe is communicated with an inlet of the second vibrating screen.

4. The powder recycling and feeding device of an electrostatic powder spraying system as claimed in claim 1, wherein a pre-treatment unit is further disposed between the second end of the recycling pipeline and the inlet of the first vibrating screen, the pre-treatment unit includes a pre-treatment vibrating screen, a pre-treatment bin and a material conveying pipe, the second end of the recycling pipeline is communicated with the inlet of the pre-treatment vibrating screen, the outlet of the pre-treatment vibrating screen is communicated with the pre-treatment bin, the first end of the material conveying pipe is communicated with the pre-treatment bin, and the second end of the material conveying pipe is communicated with the inlet of the first vibrating screen.

5. The powder recycling and feeding apparatus of an electrostatic powder coating system according to claim 4, wherein the pre-treatment vibrating screen is grounded.

6. The powder recovery supplying device of the electrostatic powder spraying system according to claim 4 or 5, wherein the mesh number of the filter mesh of the pretreatment vibrating screen is smaller than that of the first vibrating screen.

7. The powder recovery supplying device of the electrostatic powder spraying system as claimed in claim 1, wherein the first end of the recovery line communicates with a bottom of a spray booth of the electrostatic powder spraying system.

8. The recycling and supplying apparatus of powder of an electrostatic powder spraying system according to any one of claims 1 to 5, wherein the mixing unit further comprises a mixing chamber, and the first vibrating screen, the second vibrating screen and the supply tank are disposed in the mixing chamber.

9. The powder recycling and supplying apparatus of an electrostatic powder spraying system according to claim 4 or 5, wherein the pretreatment unit further comprises a pretreatment room, and the pretreatment vibrating screen and the pretreatment bin are provided in the pretreatment room.

Technical Field

The invention relates to the technical field of powder electrostatic spraying, in particular to a powder recycling and supplying device of a powder electrostatic spraying system.

Background

At present, in the electrostatic powder spraying of high-speed intermittent steel plates and aluminum plates or high-speed continuous steel plates and aluminum plates, the running speed of a plate belt is high, the area to be sprayed in unit time is large, the powder consumption in the electrostatic powder spraying operation process is large, and a large number of powder spraying spray guns are required to be arranged in each single electrostatic powder spraying system to meet the powder supply requirement. However, in the electrostatic powder spraying process, the powder sprayed from each spray gun cannot be completely adsorbed on the product, and about 20% to 30% of the powder falls or is discharged outside the range of the product, and in order to reduce the waste of the powder, it is necessary to recover the excess powder (also referred to as old powder), mix the recovered old powder with new (unused) powder, sieve the powder by a vibrating screen, and supply the powder again to each spray gun for electrostatic powder spraying.

However, in practice, it has been found that, since the old powder recovered is the powder ejected by the electrostatic powder-spraying gun, the static electricity is attached on the powder, and the powder is easy to agglomerate due to the electrostatic attraction when the old powder meets the new powder to form larger particles, in the subsequent sieving process, the filter screen of the vibrating screen is easy to be blocked, the situation of unsmooth powder passing occurs, the flow of the powder passing through the vibrating screen is reduced, the situation of short supply of the powder in the electrostatic powder spraying system is caused, particularly when certain products are sprayed, when the filter screen of the vibrating screen is required to be very dense and the mesh number is very high, the agglomerated powder in the vibrating screen is not easy to pass through, the vibrating screen is easily blocked completely, the electrostatic powder spraying operation must be stopped at the moment to clean the vibrating screen, the normal operation of the electrostatic powder spraying operation is seriously influenced, the production efficiency is reduced, and the production cost is increased.

Disclosure of Invention

The invention aims to provide a powder recovery and supply device of a powder electrostatic spraying system, which can effectively avoid the situation that new powder and old powder in the prior art are collided and agglomerated in a vibrating screen to block the vibrating screen, ensure the smooth supply of the powder, ensure the normal operation of powder electrostatic spraying operation, and achieve the effects of improving the production efficiency and reducing the production cost.

In order to achieve the above object, the present invention provides a powder recycling and supplying apparatus of an electrostatic powder coating system, wherein the powder recycling and supplying apparatus of the electrostatic powder coating system comprises: the powder spraying device comprises a recovery pipeline, a cyclone recoverer, a mixing unit, a material supplementing unit and a feeding pipe, wherein the mixing unit comprises a first vibrating screen, a second vibrating screen and a feeding box, the first end of the recovery pipeline is communicated with a spraying room of the powder electrostatic spraying system, the second end of the recovery pipeline is communicated with an inlet of the first vibrating screen, the cyclone recoverer is communicated with the recovery pipeline, the material supplementing unit is communicated with an inlet of the second vibrating screen, an outlet of the first vibrating screen and an outlet of the second vibrating screen are communicated with the feeding box, the first end of the feeding pipe is communicated with the feeding box, and the other end of the feeding pipe is communicated with a powder spraying gun in the spraying room of the powder electrostatic spraying system.

The powder recycling and supplying device of the electrostatic powder spraying system as described above, wherein the first vibrating screen is grounded.

The powder recycling and supplying device of the electrostatic powder spraying system comprises a material supplementing pipe and a material supplementing device, wherein a first end of the material supplementing pipe is communicated with the material supplementing device, and a second end of the material supplementing pipe is communicated with an inlet of the second vibrating screen.

The powder recycling and supplying device of the electrostatic powder spraying system comprises a recycling pipeline, wherein a pre-treatment unit is further arranged between a second end of the recycling pipeline and an inlet of a first vibrating screen, the pre-treatment unit comprises a pre-treatment vibrating screen, a pre-treatment bin and a conveying pipeline, the second end of the recycling pipeline is communicated with the inlet of the pre-treatment vibrating screen, an outlet of the pre-treatment vibrating screen is communicated with the pre-treatment bin, a first end of the conveying pipeline is communicated with the pre-treatment bin, and a second end of the conveying pipeline is communicated with the inlet of the first vibrating screen.

The powder recycling and supplying apparatus of the electrostatic powder coating system as described above, wherein the pre-treatment vibrating screen is grounded.

The powder recycling and supplying device of the electrostatic powder spraying system as described above, wherein the mesh number of the filter screen of the pretreatment vibrating screen is smaller than the mesh number of the filter screen of the first vibrating screen.

The powder recycling and supplying device of the electrostatic powder spraying system as described above, wherein the first end of the recycling pipeline is communicated with the bottom of the spray chamber of the electrostatic powder spraying system.

The powder recycling and supplying device of the electrostatic powder spraying system comprises a first vibrating screen, a second vibrating screen, a feeding box and a mixing unit, wherein the first vibrating screen, the second vibrating screen and the feeding box are arranged in the mixing room.

The powder recycling and supplying device of the electrostatic powder spraying system comprises a pre-treatment unit, a pre-treatment vibrating screen and a pre-treatment material box, wherein the pre-treatment vibrating screen and the pre-treatment material box are arranged in the pre-treatment room.

Compared with the prior art, the invention has the following advantages:

according to the powder recovery and supply device of the electrostatic powder spraying system, the first vibrating screen and the second vibrating screen are arranged to respectively sieve the old powder in the recovery pipeline and the new powder supplied by the material supplementing unit, so that the situation that the old powder and the new powder are sieved in the same vibrating screen at the same time and are agglomerated to block the vibrating screen can be effectively avoided, smooth supply of the powder is guaranteed, the electrostatic powder spraying operation is normally carried out, and the effects of improving the production efficiency and reducing the production cost are achieved.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a schematic structural diagram of a powder recycling and supplying device of an electrostatic powder coating system provided by the present invention;

fig. 2 is another schematic structural diagram of a powder recycling and supplying device of the electrostatic powder spraying system provided by the invention.

The reference numbers illustrate:

1. a recovery pipeline;

2. a mixing unit;

21. a first vibrating screen;

22. a second vibrating screen;

23. a feeding tank;

24. a mixing room;

3. a material supplementing unit;

31. a material supplementing pipe;

32. a material supplementing device;

4. a feed pipe;

5. a pre-processing unit;

51. pretreating a vibrating screen;

52. pretreating a feed box;

53. a delivery pipe;

54. a pretreatment room;

6. a cyclone recoverer;

7. spraying a room;

8. a powder spray gun.

Detailed Description

In order to clearly understand the technical solution, the purpose and the effect of the present invention, a detailed description of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present invention provides a powder recycling and supplying apparatus of an electrostatic powder coating system, wherein the powder recycling and supplying apparatus of the electrostatic powder coating system comprises: the powder electrostatic spraying system comprises a recovery pipeline 1, a cyclone recoverer 6, a mixing unit 2, a supplement unit 3 and a feeding pipe 4, wherein the mixing unit 2 comprises a first vibrating screen 21, a second vibrating screen 22 and a feeding box 23, a first end of the recovery pipeline 1 is communicated with a spraying room 7 of the powder electrostatic spraying system, a second end of the recovery pipeline 1 is communicated with an inlet of the first vibrating screen 21, the cyclone recoverer 6 is communicated with the recovery pipeline 1, the cyclone recoverer 6 is used for sucking redundant powder (namely old powder) in the spraying room 7 of the powder electrostatic spraying system into the recovery pipeline 1, the redundant powder (namely the old powder) in the spraying room 7 of the powder electrostatic spraying system enters the first vibrating screen 21 through the recovery pipeline 1 to be screened to remove impurities in the redundant powder, the supplement unit 3 is communicated with an inlet of the second vibrating screen 22, the supplement unit 3 is used for providing unused new powder for the powder electrostatic spraying system, to ensure the sufficiency of the powder, the new powder provided by the supplementary unit 3 enters the second vibrating screen 22 to be screened, so as to disperse the particles of the new powder and remove a small amount of impurities which may be mixed in the new powder during the manufacturing process, the outlet of the first vibrating screen 21 and the outlet of the second vibrating screen 22 are both communicated with the feeding box 23, the old powder is filtered by the first vibrating screen 21 and then enters the feeding box 23 through the outlet of the first vibrating screen 21, the new powder is filtered through the second vibrating screen 22 and enters the feed tank 23 through the outlet of the second vibrating screen 22, old powder and new powder are mixed in a feed box 23, the first end of a feed pipe 4 is communicated with the feed box 23, the other end of the feed pipe 4 is communicated with a powder spraying spray gun 8 in a spray room 7 of the electrostatic powder spraying system, and the new powder and the old powder in the feed box 23 are mixed and then are supplied to each powder spraying spray gun 8 in the spray room 7 of the electrostatic powder spraying system through the feed pipe 4 to carry out electrostatic powder spraying operation.

Through setting up first shale shaker 21 and second shale shaker 22, sieve the old powder in the recovery pipeline 1 and the new powder that supplementary unit 3 supplied with respectively, can effectively avoid appearing old powder and new powder and sieve the stifled dead condition of looks suction mass with the shale shaker simultaneously in same shale shaker to guarantee the smooth supply of powder, make the normal clear of powder electrostatic spraying operation, reach the effect that improves production efficiency and reduction in production cost.

Preferably, the powder recycling and supplying device of the electrostatic powder spraying system according to the present invention is configured such that the first vibrating screen 21 is grounded to guide the electrostatic charges of the old powder, so as to reduce the phenomenon that the old powder after being sieved and the new powder after being sieved are agglomerated when being mixed, and the new powder and the old powder are uniformly sprayed from the powder spraying gun 8 in a more dispersed manner after being mixed, thereby improving the uniformity of powder spraying during the electrostatic powder spraying operation.

Further, as shown in fig. 1 and fig. 2, the powder recycling and supplying device of the electrostatic powder spraying system according to the present invention includes a material supplementing unit 3, wherein a first end of the material supplementing pipe 31 is communicated with the material supplementing device 32, a second end of the material supplementing pipe 31 is communicated with an inlet of the second vibrating screen 22, the material supplementing device 32 is configured to receive new unused powder, and the material supplementing pipe 31 is configured to provide the new unused powder to the material mixing unit 2.

Further, as shown in fig. 2, the powder recycling and supplying device of the electrostatic powder spraying system provided by the invention, wherein, a pretreatment unit 5 is arranged between the second end of the recovery pipeline 1 and the inlet of the first vibrating screen 21, the pretreatment unit 5 comprises a pretreatment vibrating screen 51, a pretreatment bin 52 and a material conveying pipe 53, the second end of the recovery pipeline 1 is communicated with the inlet of the pretreatment vibrating screen 51, the outlet of the pretreatment vibrating screen 51 is communicated with the pretreatment bin 52, the first end of the material conveying pipe 53 is communicated with the pretreatment bin 52, the second end of the material conveying pipe 53 is communicated with the inlet of the first vibrating screen 21, the pretreatment unit 5 is used before the old powder enters the mixing unit 2, the old powder is pretreated and filtered by the pretreatment vibrating screen 51, so that most of impurities in the old powder can be removed, and the filtering pressure of the first vibrating screen 21 in the mixing unit 2 is reduced.

Preferably, the powder recycling and supplying device of the electrostatic powder spraying system provided by the invention is characterized in that the pretreatment vibrating screen 51 is grounded, and the grounded first vibrating screen 21 is matched in such a way, so that the electrostatic charge carried by the old powder can be guided twice, and the electrostatic charge carried by the old powder can be further reduced before the old powder is mixed with the new powder.

Preferably, the mesh number of the filter mesh of the pre-treatment vibrating screen 51 may be set to be smaller than that of the first vibrating screen 21, the pre-treatment vibrating screen 51 primarily screens out larger impurities in the old powder, and then the first vibrating screen 21 secondarily screens out smaller impurities in the powder.

Preferably, as shown in fig. 1 and 2, the powder recycling and supplying device of the electrostatic powder coating system according to the present invention is configured such that the first end of the recycling line 1 is communicated with the bottom of the spray chamber 7 of the electrostatic powder coating system, so that substantially all of the old powder in the spray chamber 7 of the electrostatic powder coating system can enter the recycling line 1, thereby reducing accumulation of the old powder in the spray chamber 7 of the electrostatic powder coating system.

Preferably, as shown in fig. 1 and 2, the powder recycling and supplying apparatus of the electrostatic powder spraying system according to the present invention further includes a mixing room 24, wherein the first vibrating screen 21, the second vibrating screen 22 and the supply tank 23 are disposed in the mixing room 24, and the mixing room 24 is disposed to prevent new powder and old powder from diffusing into the surrounding environment during the sieving and mixing processes to pollute the environment and threaten the health of workers in the environment.

Preferably, as shown in fig. 1 and 2, the powder recycling and supplying device of the electrostatic powder spraying system provided by the present invention further includes a pretreatment room 54, wherein the pretreatment vibrating screen 51 and the pretreatment material box 52 are disposed in the pretreatment room 54, and similarly, the pretreatment room 54 is also disposed to prevent old powder from diffusing into the surrounding environment during pretreatment to cause pollution to the environment and to pose a threat to the health of workers in the environment.

Compared with the prior art, the invention has the following advantages:

according to the powder recovery and supply device of the electrostatic powder spraying system, the first vibrating screen and the second vibrating screen are arranged to respectively sieve the old powder in the recovery pipeline and the new powder supplied by the material supplementing unit, so that the situation that the old powder and the new powder are sieved in the same vibrating screen at the same time and are agglomerated to block the vibrating screen can be effectively avoided, smooth supply of the powder is guaranteed, the electrostatic powder spraying operation is normally carried out, and the effects of improving the production efficiency and reducing the production cost are achieved.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.