Material mixing prevention mechanism of material conveying machine for powder coating

Abstract

The invention provides an anti-mixing mechanism of a material conveying machine for powder coating. First feeders are arranged below ingredient storage units respectively; a feeding pipe is mounted at the bottom of each first feeder, one end of each feeding pipe is connected to the side face of the feeding cylinder through a pipeline, and the lower end of the feeding cylinder is mounted at the top of the coating stirring device; the other end of the feeding pipe is connected with outlets of the second electric control valves, and inlets of the second electric control valves are connected with the feeding fan through pipelines. When the device is used and the feeding fan is used for feeding, the second electric control valve is opened, components in all the ingredient storage tanks are sequentially fed into the feeding cylinder, all the ingredient storage tanks are mutually independent, all the conveying lines are also independent, and therefore the problem that different components are mixed with one another can be avoided; all the components can be conveyed to a designated place through the conveying pipe after being stirred in the ingredient storage tank, and automatic stirring and automatic conveying are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder coating production, and specifically to an anti-mixing mechanism for a powder coating feeder. Background Art

[0002] Powder coatings are in a completely different form from general coatings and exist in the form of fine powders. Powder coatings are mainly divided into two categories, namely thermoplastic powder coatings and thermosetting powder coatings. Thermoplastic powder coatings are composed of components such as thermoplastic resins, pigments, fillers, plasticizers, and stabilizers. Thermoplastic powder coatings include polyethylene, polypropylene, polyester, polyvinyl chloride, chlorinated polyether, polyamide-based, cellulose-based, and polyester-based.

[0003] In the production and processing of powder coatings, high precision is required for the proportioning of powder coatings, and there are many types of raw materials. When producing powder coatings, various components of the powder coatings need to be added one by one, the addition process is cumbersome, and the proportioning accuracy of the powder coatings is insufficient. For this reason, we propose an anti-mixing mechanism for a powder coating feeder. Summary of the Invention

[0004] Aiming at the deficiency that in the process of preparing existing powder coatings, it is necessary for workers to add each component to the stirring equipment, the present invention provides an anti-mixing mechanism for a powder coating feeder, which has the advantages of automatically adding each component of the powder coating, and being able to automatically stir and automatically convey, and solves the problems raised in the above background art.

[0005] The technical solution of the present invention is realized as follows: An anti-mixing mechanism for a powder coating feeder includes a number of first feeders and a number of batching storage units, and the first feeders are respectively arranged below the batching storage units; a feed pipe is respectively installed at the bottom of each first feeder, and one end of each feed pipe is respectively connected to the side surface of the feed cylinder through a pipeline, and the lower end of the feed cylinder is installed on the top of the coating stirring device; the other end of the feed pipe is respectively connected to the outlet of the second electric control valve, and the inlets of each second electric control valve are connected to a feeding fan through a pipeline.

[0006] Preferably, a feed pipe corresponding to the feed pipe in number is installed on the side surface of the feed cylinder, and a flow valve is provided on the feed pipe.

[0007] Preferably, the feed pipe is arranged obliquely upward.

[0008] Preferably, the batching storage unit includes a batching storage tank, and a plurality of brackets are installed on the side surface of the batching storage tank; a sealing cover is detachably installed on the top of the batching storage tank, and the top of the first feeder is installed at the bottom of the batching storage tank.

[0009] Preferably, the coating stirring device comprises a stirring tank, and a plurality of legs are arranged on the side surface of the stirring tank; a top cover is detachably installed on the top of the stirring tank, a driving device is arranged at the center of the top of the top cover, and the driving device is used for driving a stirring mechanism located in the stirring tank; a second feeder is installed at the bottom of the stirring tank, the lower part of the second feeder is connected with a conveying pipe, one end of the conveying pipe is connected with a feeding fan through a pipeline, and a third electric control valve is installed at one end of the conveying pipe close to the feeding fan.

[0010] Preferably, it further comprises a control cabinet, a controller is arranged in the control cabinet, and the controller is electrically connected with a flow valve, a feeding fan, a first feeder, a second feeder, a second electric control valve, a third electric control valve and a driving device respectively.

[0011] Preferably, the stirring mechanism comprises a mounting shaft coaxially located in the stirring tank, the top of the mounting shaft is rotatably connected with the center of the top cover, and the top end of the mounting shaft is connected with the driving device; a plurality of spiral stirring blades are arranged on the side surface of the mounting shaft, and the spiral stirring blades are respectively connected to the mounting shaft through a plurality of connecting rods.

[0012] Preferably, the top of the second feeder is connected with the bottom of the stirring tank through a first electric control valve; a spiral lifting blade is arranged at the bottom of the mounting shaft, and both the spiral lifting blade and the bottom of the mounting shaft are placed in the top inlet of the first electric control valve.

[0013] Preferably, a plurality of groups of stirring blades are further arranged on the side surface of the mounting shaft, and the number of each group of stirring blades is at least three and they are symmetrically arranged.

[0014] Preferably, an observation port is further arranged on the top cover, and a protective cover is detachably arranged at the top of the observation port.

[0015] Compared with the prior art, when the present invention is in use, when the feeding fan feeds materials, the second electric control valve is opened, so that the components in each ingredient storage tank are sequentially fed into the feeding cylinder. Each ingredient storage tank is independent of each other, and each conveying line is also independent. Therefore, the problem of mutual mixing of different components can be avoided; moreover, after each component is stirred in the ingredient storage tank, it can be conveyed to a designated location through the conveying pipe, and the whole process of powder coating preparation does not require manual addition, realizing automatic stirring and automatic conveying. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the front part of the present invention Figure 1 .

[0018] Figure 2 This is a schematic structural view of the rear part of the present invention.

[0019] Figure 3 This is a schematic structural view of the front part of the present invention Figure 2 。

[0020] Figure 4 This is a schematic structural view of the stirring mechanism inside the stirring tank of the present invention.

[0021] In the figure: 1, feeding fan; 2, driving device; 3, stirring tank; 4, top cover; 5, first electric control valve; 6, sealing cover; 7, ingredient storage tank; 8, support; 9, first feeder; 10, feeding pipe; 11, conveying pipe; 12, second feeder; 13, leg; 14, flow valve; 15, feed pipe; 16, feed cylinder; 17, flange edge; 18, flange seat; 19, second electric control valve; 20, third electric control valve; 21, observation port; 22, protective cover; 23, spiral lifting blade; 24, stirring blade; 25, spiral stirring blade; 26, mounting shaft; 27, connecting rod; 28, control cabinet. Specific embodiments

[0022] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present invention.

[0023] Refer to Figures 1 to 4 , the present invention provides a technical solution: an anti-mixing mechanism for a powder coating feeder, including a number of ingredient storage units. In the actual application process, the number of ingredient storage units should correspond to the number of powder coating formulas. In other words, each component of the powder coating is stored in an ingredient storage unit. As Figure 2 shown, the ingredient storage unit includes an ingredient storage tank 7. A plurality of supports 8 are installed on the side of the ingredient storage tank 7, and the supports 8 are supported on the ground. Again, as Figure 2 shown, the ingredient storage tanks 7 are arranged in a straight line or in an N-row * M-column manner, and the formula names of the powder coatings are marked on each ingredient storage tank 7, and then each component is stored in the ingredient storage tank 7;

[0024] A detachable sealing cover 6 is installed on the top of the ingredient storage tank 7. The edge of the sealing cover 6 is connected to the ingredient storage tank 7 through a lock. And a first feeder 9 is installed at the bottom of each ingredient storage tank 7. The top of the first feeder 9 is connected to the bottom of the ingredient storage tank 7 through a flange.

[0025] Among them, the first feeder 9 is an impeller feeder. Since the first feeder 9 is respectively arranged below the batching storage unit, when the first feeder 9 operates, the first feeder 9 will evenly convey the powder outward. Therefore, a feeding pipe 10 is respectively installed at the bottom of each first feeder 9, and the powder flowing down through the first feeder 9 flows into the feeding pipe 10;

[0026] As Figure 2 shown, one end of the feeding pipe 10 is respectively connected to the outlet of the second electric control valve 19, and the inlets of the second electric control valves 19 are connected to the feeding fan 1 through pipelines. Here, the feeding fan 1 is a Roots blower, a centrifugal fan or a vacuum pump. The feeding fan 1 will convey the air flow into the feeding pipe 10 through the pipeline, and then convey the powder located in the feeding pipe 10 outward;

[0027] The specific conveying process is that when a certain formula needs to be conveyed, only the corresponding second electric control valve 19 needs to be opened, and the other second electric control valves 19 are closed. In this way, the air flow blown by the feeding fan 1 can be blown into the feeding pipe 10. As the first feeder 9 continuously conveys the powder downward, the powder flowing into the feeding pipe 10 is pushed forward by the air flow.

[0028] The other end of each feeding pipe 10 (i.e., the end of the feeding pipe 10 far from the second electric control valve 19) is respectively connected to the side of the feeding cylinder 16 through a pipeline. The lower end of the feeding cylinder 16 is installed on the top of the paint stirring device. Here, the paint stirring device stirs each formula. The specific structure of the paint stirring device includes a stirring tank 3. A plurality of legs 13 are arranged on the side of the stirring tank 3, and the legs 13 support on the ground. A top cover 4 is detachably installed on the top of the stirring tank 3. Specifically, the edge of the top cover 4 is connected to the top of the stirring tank 3 through bolts or through a buckle. A driving device 2 is arranged at the center of the top of the top cover 4, and the driving device 2 is used to drive the stirring mechanism located in the stirring tank 3;

[0029] It should be noted that when the feeding fan 1 feeds, it conveys to each batching storage tank 7 step by step, rather than conveying to two or more batching storage tanks 7, so as to ensure the accuracy of the powder conveying of each batching storage tank 7. As Figure 2 shown, feeding pipes 15 corresponding to the feeding pipes 10 are installed on the side of the feeding cylinder 16, and a flow valve 14 is arranged on the feeding pipe 15. Therefore, the powder entering the feeding cylinder 16 can be monitored in real time through the flow valve 14. When the powder flow rate flowing through the flow valve 14 reaches the preset value, the flow valve 14 automatically closes;

[0030] It should be additionally noted that the feed pipe 15 needs to be arranged obliquely upward. The advantage of this is that when the flow valve 14 is closed, the powder in the feed pipe 15 can automatically fall along the feed pipe 15 into the feed cylinder 16, and then the powder completely falls into the batching storage tank 7;

[0031] After the powder in each batching storage tank 7 enters the interior of the coating mixing device according to the set flow rate, the driving device 2 drives the mixing mechanism to mix and blend each formula. After the mixing is completed, the mixed powder coating needs to be conveyed outwards. Therefore, a second feeder 12 is installed at the bottom of the mixing tank 3. The second feeder 12 is the same as the first feeder 9, and both are impeller feeders. The second feeder 12 is connected to the conveying pipe 11 below it. One end of the conveying pipe 11 is connected to the feeding fan 1 through a pipeline, and a third electric control valve 20 is installed at one end of the conveying pipe 11 close to the feeding fan 1;

[0032] When conveying the powder coating outwards, each flow valve 14 is in the closed state, and then the third electric control valve 20 is opened. As the second feeder 12 conveys the powder coating downward at a constant speed, the airflow blown out from the feeding fan 1 can drive the powder coating in the conveying pipe 11 to be conveyed forward. In the actual operation process, the powder coating can be conveyed to a preset location through a pipeline at the end of the conveying pipe 11 away from the third electric control valve 20.

[0033] In summary, the present invention further includes a control cabinet 28, which can be installed on the bracket 8 for the convenience of operation by the operator. The control cabinet 28 is provided with a controller, and the controller is a mainframe or a PLC logic controller. The controller is electrically connected to the flow valve 14, the feeding fan 1, the first feeder 9, the second feeder 12, the second electric control valve 19, the third electric control valve 20, and the driving device 2 respectively. Here, the controller is equivalent to the control center of the entire device. Under the control of this controller, each component can operate according to the set value, enabling the entire device to achieve automatic control. An operation screen and operation buttons connected to the controller are also provided on the control cabinet 28;

[0034] Under the control of the controller, each second electric control valve 19 is gradually opened to send the components in each batching storage tank 7 into the feed cylinder 16 in sequence, and then fall into the mixing tank 3 for storage. Each batching storage tank 7 is independent of each other, and each conveying line is also independent. Therefore, the problem of mutual mixing of different components can be avoided. After all components are conveyed, high-pressure air is conveyed into the conveying pipe 11 by the feeding fan 1 to convey the powder coating to a preset location.

[0035] Furthermore, the stirring mechanism includes a mounting shaft 26 coaxially located inside the stirring tank 3. The top of the mounting shaft 26 is rotatably connected to the center of the top cover 4, and the top end of the mounting shaft 26 is connected to the driving device 2. A plurality of spiral stirring blades 25 are provided on the side of the mounting shaft 26, and the spiral stirring blades 25 are respectively connected to the mounting shaft 26 through a plurality of connecting rods 27.

[0036] The top of the second feeder 12 is connected to the bottom of the stirring tank 3 through a first electric control valve 5. A spiral lifting blade 23 is provided at the bottom of the mounting shaft 26. Both the spiral lifting blade 23 and the bottom of the mounting shaft 26 are placed inside the top inlet of the first electric control valve 5. The specific operation process is that the spiral lifting blade 23 can lift the powder inside the first electric control valve 5 upward to prevent the powder from concentrating at the inlet of the first electric control valve 5 and being unable to be stirred. When discharging, the driving device 2 can be controlled to flip so that the spiral lifting blade 23 rotates in the opposite direction to when stirring, and the spiral lifting blade 23 drives the powder to be conveyed downward, thereby improving the discharging efficiency and preventing the powder from clogging above the first electric control valve 5.

[0037] To increase the stirring efficiency of the spiral stirring blades 25, as Figure 4 shown, a plurality of groups of stirring blades 24 are also provided on the side of the mounting shaft 26. The number of each group of stirring blades 24 is at least three and they are symmetrically arranged. The inclination direction of the stirring blades 24 is opposite to that of the spiral stirring blades 25.

[0038] Furthermore, an observation port 21 is also provided on the top cover 4. A protective cover 22 is detachably provided at the top of the observation port 21. The provided observation port 21 can be used to take samples of the powder coating in the batching storage tank 7 and can also observe the stirring situation inside the tank through the observation port 21.

[0039] Based on the above implementation, it can be further optimized by providing a pressure relief valve on the top of the top cover 4 to prevent the internal pressure of the batching storage tank 7 from being too high.

[0040] Based on the above implementation, it can be further optimized that the feed cylinder 16 is detachable. Specifically, a flange edge 17 is provided at the bottom of the feed cylinder 16, and a flange seat 18 is provided on the top of the top cover 4. Then, the flange edge 17 and the flange seat 18 can be fastened with bolts.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A powder coating feeder anti-additive mechanism, characterized in that: It comprises a plurality of first feeders (9) and a plurality of ingredient storage units, wherein the first feeders (9) are respectively arranged below the ingredient storage units; A feeding pipe (10) is installed at the bottom of each first feeder (9), one end of each feeding pipe (10) is connected to the side of a feeding barrel (16) through a pipeline, and the lower end of the feeding barrel (16) is installed on the top of the paint stirring device; The other end of the feeding pipe (10) is connected to the outlet of the second electric control valve (19), and the inlet of each second electric control valve (19) is connected to the feeding fan (1) through a pipeline.

2. The anti-additive mechanism for a powder coating feeder according to claim 1, characterized in that: Feed pipes (15) whose number corresponds to the number of feed pipes (10) are installed on the side of the feed barrel (16), and flow valves (14) are arranged on the feed pipes (15).

3. The anti-additive mechanism for a powder coating feeder as claimed in claim 2, characterized in that: The feed pipe (15) is arranged to be inclined upward.

4. The anti-additive mechanism for a powder coating feeder as claimed in claim 1, characterized in that: The ingredient storage unit comprises an ingredient storage tank (7), and a plurality of brackets (8) are installed on the side of the ingredient storage tank (7); A sealing cover (6) is detachably mounted on the top of the ingredient storage tank (7), and the top of the first feeder (9) is mounted on the bottom of the ingredient storage tank (7).

5. The anti-additive mechanism for a powder coating feeder as claimed in claim 2, characterized in that: The paint stirring device comprises a stirring tank (3), and a plurality of supporting legs (13) are provided on the side of the stirring tank (3); A top cover (4) is detachably mounted on the top of the stirring tank (3), and a driving device (2) is provided at the top center of the top cover (4), and the driving device (2) is used to drive a stirring mechanism located in the stirring tank (3); A second feeder (12) is installed at the bottom of the mixing tank (3), and the lower part of the second feeder (12) is connected to a conveying pipe (11), one end of the conveying pipe (11) is connected to a feeding fan (1) through a pipeline, and a third electric control valve (20) is installed at one end of the conveying pipe (11) close to the feeding fan (1).

6. The anti-additive mechanism for a powder coating feeder as claimed in claim 5, characterized in that: The invention also comprises a control cabinet (28), wherein a controller is arranged in the control cabinet (28), and the controller is electrically connected to the flow valve (14), the feeding fan (1), the first feeder (9), the second feeder (12), the second electric control valve (19), the third electric control valve (20) and the driving device (2).

7. The anti-additive mechanism for a powder coating feeder as claimed in claim 6, characterized in that: The stirring mechanism comprises a mounting shaft (26) coaxially located in the stirring tank (3), the top of the mounting shaft (26) is rotatably connected to the center of the top cover (4), and the top end of the mounting shaft (26) is connected to the driving device (2); A plurality of spiral stirring blades (25) are arranged on the side of the installation shaft (26), and the spiral stirring blades (25) are respectively connected to the installation shaft (26) through a plurality of connecting rods (27).

8. The anti-additive mechanism for a powder coating feeder as claimed in claim 7, characterized in that: The top of the second feeder (12) is connected to the bottom of the stirring tank (3) through the first electric control valve (5); A spiral lifting blade (23) is provided at the bottom of the installation shaft (26), and the spiral lifting blade (23) and the bottom of the installation shaft (26) are both placed in the top inlet of the first electric control valve (5).

9. The anti-additive mechanism for a powder coating feeder as claimed in claim 7, characterized in that: A plurality of groups of stirring blades (24) are also arranged on the side of the installation shaft (26), and each group of stirring blades (24) has at least three stirring blades and are symmetrically arranged.

10. The anti-additive mechanism for a powder coating feeder according to claim 7, characterized in that: The top cover (4) is also provided with an observation port (21), and a protective cover (22) is detachably provided on the top of the observation port (21).

Images