Control device for nitrogen purging and vacuum filtering system of dynamic mixer

Abstract

The utility model discloses a control device suitable for nitrogen gas purging dust removal and vacuum filtration system of dynamic mixer belongs to nitrogen gas purging technical field of dynamic mixer, include: fixed baseplate, through the cooperation of above -mentioned each device, in the utility model, through being provided with nitrogen gas purging dust removal and vacuum filtration system, better realize the control to the vacuum environment in the powder material addition and powder material mixing process, effectively solved the filler such as powder material floating and adhering on the closure of equipment in the adhesive production process etc, cause the problem of the unstable product quality of adhered powder material and vacuum pipeline blockage, effectively prevented the partial powder material in the vacuumizing process and be extracted to the vacuum pump and appear the blockage condition, further guaranteed the stability in the powder material mixing process, and then improved production efficiency, and realized intelligent control under the control of nitrogen gas purging dust removal and vacuum filtration system, guaranteed the stability of adhesive product and the quality of product in the production process.

Description

Technical Field

[0001] This utility model belongs to the field of nitrogen purging technology for dynamic mixers, and particularly relates to a control device suitable for nitrogen purging dust removal and vacuum filtration systems for dynamic mixers. Background Technology

[0002] In the production process of adhesives and other pastes, the main raw materials include polyether polyols, catalysts, and various powders. During production, the polyether polyol is first fed into a dynamic mixer. After the polyether polyol feeding is completed, the catalyst and powders are then fed into the dynamic mixer. During the production process of adhesives and other pastes, the powder adhering to the equipment needs to be mixed into the paste to ensure that the powder is mixed into the product and reacts fully. After the adhesives and other pastes are mixed evenly, the inside of the dynamic mixer is evacuated. During the evacuation, the vacuum condition of the mixing process is monitored online. After the evacuation is completed, samples are taken for testing. Only after the mixed product is qualified is it pressed.

[0003] In the existing technology, during the adhesive mixing reaction process, fillers such as powder float on the top of the liquid, and some powder also adheres to the surface of the equipment, such as the end caps. Since the adhered powder cannot mix and react well with the liquid, the adhered powder will lead to unstable product quality. Furthermore, during the vacuuming process, the powder may be drawn into the pipeline or vacuum pump, causing blockage of the vacuum pipeline and reducing the working stability of the equipment.

[0004] Therefore, this utility model provides a control device suitable for nitrogen purging dust removal and vacuum filtration systems of dynamic mixers to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This utility model provides a control device suitable for nitrogen purging dust removal and vacuum filtration systems of dynamic mixers, aiming to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A control device for a nitrogen purging dust removal and vacuum filtration system for a dynamic mixer includes: a fixed base, on the upper surface of the fixed base a dynamic mixer cylinder is provided, on the upper surface of the dynamic mixer cylinder a dynamic mixer head is fixedly installed, a removable filter screen is provided inside the dynamic mixer head, one end of the removable filter screen extends into the interior of the dynamic mixer cylinder, and a vacuum pump is fixedly installed on the upper surface of the fixed base;

[0010] The vacuum pump has a vacuum pump pipeline fixedly installed at its input end, and an operation box is fixedly installed on the upper surface of the fixed base. The operation box is equipped with a vacuum-nitrogen purging control interlock system.

[0011] As a further description of the above technical solution:

[0012] One end of the vacuum pump pipeline is connected to a vacuum pipeline and a bypass pipeline, and one end of the bypass pipeline is connected to the side wall of the vacuum pipeline.

[0013] As a further description of the above technical solution:

[0014] A vacuum regulating valve and a secondary filter are fixedly installed at the middle end of the vacuum pipeline, and a bypass regulating valve and another secondary filter are fixedly installed at the middle end of the bypass pipeline. One end of the vacuum pipeline is threadedly connected to the inner wall of the removable filter screen.

[0015] As a further description of the above technical solution:

[0016] A nitrogen pipeline is fixedly installed on the inner wall of the shell cavity of the dynamic mixer head. One end of the nitrogen pipeline extends into the interior of the dynamic mixer barrel. A nitrogen branch pipe is connected to the outer surface of the nitrogen pipeline and is located inside the dynamic mixer barrel.

[0017] As a further description of the above technical solution:

[0018] The other end of the nitrogen pipeline extends to the outside of the upper surface of the mixer head. A nitrogen regulating valve is fixedly installed inside the nitrogen pipeline, and the nitrogen regulating valve is located above the mixer head.

[0019] As a further description of the above technical solution:

[0020] A purging line is installed between the nitrogen line and the vacuum line. A nitrogen purging regulating valve is fixedly installed at the middle end of the purging line. One end of the purging line is located above the nitrogen regulating valve, and the other end is located below the bypass line.

[0021] As a further description of the above technical solution:

[0022] A stepper motor is fixedly installed on the upper surface of the dynamic mixer head, and a stirring shaft is fixedly installed on the output end of the stepper motor. One end of the stirring shaft extends into the interior of the dynamic mixer barrel, and several dispersing discs are fixedly installed on the outer surface of the stirring shaft.

[0023] As a further description of the above technical solution:

[0024] A vacuum pressure gauge is fixedly installed on the inner wall of the cylinder of the dynamic mixer. The detection end of the vacuum pressure gauge is located inside the cylinder of the dynamic mixer, and the observation end of the vacuum pressure gauge is located outside the cylinder of the dynamic mixer.

[0025] (III) Beneficial Effects

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0027] This invention incorporates a nitrogen purging and vacuum filtration system, which effectively controls the vacuum environment during powder addition and mixing. This solves the problem of powder and fillers floating and adhering to the equipment head during adhesive production, leading to unstable product quality and vacuum line blockage. It also prevents some powder from being drawn into the vacuum pump during vacuuming, further ensuring the stability of powder mixing and improving production efficiency. Furthermore, the nitrogen purging and vacuum filtration system enables intelligent control, guaranteeing the stability and quality of the adhesive products during production. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a control device suitable for nitrogen purging dust removal and vacuum filtration systems in dynamic mixers.

[0029] Figure 2 This is a cross-sectional structural diagram of the mixing mill barrel in a control device suitable for nitrogen purging dust removal and vacuum filtration systems of mixing mills.

[0030] Figure 3 This is a schematic diagram of the vacuum-nitrogen purging control interlocking system in the control device of the nitrogen purging dust removal and vacuum filtration system for dynamic mixers.

[0031] Legend:

[0032] 1. Dynamic mixer head; 2. Agitator shaft; 3. Dispersion disc; 4. Nitrogen line; 5. Nitrogen regulating valve; 6. Nitrogen branch pipe; 7. Removable filter screen; 8. Vacuum line; 9. Vacuum regulating valve; 10. Secondary filter; 11. Bypass regulating valve; 12. Vacuum pump; 13. Vacuum pressure gauge; 14. Vacuum-nitrogen purging control interlock system; 15. Control box; 16. Nitrogen purging regulating valve; 17. Dynamic mixer barrel; 18. Stepper motor; 19. Purging line; 20. Bypass line; 21. Vacuum pump line; 22. Fixed base. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] In specific implementation, such as Figures 1-3 As shown, this utility model provides a technical solution: a control device suitable for a nitrogen purging dust removal and vacuum filtration system for a dynamic mixer, including a fixed base 22. A dynamic mixer cylinder 17 is provided on the upper surface of the fixed base 22. A dynamic mixer end cap 1 is fixedly installed on the upper surface of the dynamic mixer cylinder 17. A removable filter screen 7 is provided inside the dynamic mixer end cap 1. One end of the removable filter screen 7 extends into the interior of the dynamic mixer cylinder 17. A vacuum pump 12 is fixedly installed on the upper surface of the fixed base 22. A vacuum pump pipeline 21 is fixedly installed at the input end of the vacuum pump 12. An operation box 15 is fixedly installed on the upper surface of the fixed base 22. A vacuum-nitrogen purging control interlock system 14 is provided inside the operation box 15.

[0035] A nitrogen pipeline 4 is fixedly installed on the inner wall of the shell cavity of the dynamic mixer head 1. One end of the nitrogen pipeline 4 extends into the interior of the dynamic mixer barrel 17. A nitrogen branch pipe 6 is connected to the outer surface of the nitrogen pipeline 4 and is located inside the dynamic mixer barrel 17.

[0036] The other end of the nitrogen pipeline 4 extends to the outside of the upper surface of the mixer head 1. A nitrogen regulating valve 5 is fixedly installed inside the nitrogen pipeline 4, and the nitrogen regulating valve 5 is located above the mixer head 1.

[0037] A purge line 19 is installed between the nitrogen line 4 and the vacuum line 8. A nitrogen purge regulating valve 16 is fixedly installed at the middle end of the purge line 19. One end of the purge line 19 is located above the nitrogen regulating valve 5, and the other end is located below the bypass line 20.

[0038] A stepper motor 18 is fixedly installed on the upper surface of the dynamic mixer head 1. A stirring shaft 2 is fixedly installed at the output end of the stepper motor 18. One end of the stirring shaft 2 extends into the interior of the dynamic mixer barrel 17. Several dispersing discs 3 are fixedly installed on the outer surface of the stirring shaft 2.

[0039] Specifically, through the cooperation of the above-mentioned structures, powder and liquid materials are fed into the mixing drum 17 of the dynamic mixer. Then, the stepper motor 18 drives the stirring shaft 2 to rotate inside the mixing drum 17. At this time, the stirring shaft 2 will drive the dispersing disc 3 to mix the materials. During the process of adding the powder into the mixing drum 17 and mixing it inside the mixing drum 17, the powder will float above the mixing drum 17 and come into contact with the mixing head 1. At this time, the nitrogen regulating valve 5 is opened through the vacuum-nitrogen purging control interlock system 14 in the control box 15, and then nitrogen is injected into the nitrogen pipeline 4. At this time, nitrogen gas passes through nitrogen pipeline 4 and is blown out from nitrogen branch pipe 6, thereby purging the powder adhering to the inner wall of the dynamic mixer head 1 and the powder floating inside the dynamic mixer barrel 17. Then, under the action of stirring shaft 2 and dispersing disk 3, it is mixed with liquid. During the nitrogen purging process, the nitrogen purging regulating valve 16 on the purging pipeline 19 is opened. At this time, nitrogen gas will pass through the purging pipeline 19 to the vacuum pipeline 8 to purge the inside of the vacuum pipeline 8. At the same time, a part of nitrogen gas is also transported through the vacuum pipeline 8 to the dynamic mixer barrel 17. During the transport process, nitrogen gas will purge the removable filter screen 7.

[0040] It should be noted that the vacuum-nitrogen purging control interlock system 14 controls the nitrogen regulating valve 5, vacuum regulating valve 9, bypass regulating valve 11 and vacuum pressure gauge 13 through the control box 15, thereby controlling the opening and closing of the regulating valves and monitoring the vacuum pressure gauge 13.

[0041] It should be noted that the control unit of the vacuum-nitrogen purging control interlock system 14 in the above description is selected as needed. This part is well-known technology in the field and will not be described in detail here.

[0042] One end of the vacuum pump line 21 is connected to the vacuum line 8 and the bypass line 20, and one end of the bypass line 20 is connected to the side wall of the vacuum line 8.

[0043] A vacuum regulating valve 9 and a secondary filter 10 are fixedly installed at the middle end of the vacuum line 8. A bypass regulating valve 11 and another secondary filter 10 are fixedly installed at the middle end of the bypass line 20. One end of the vacuum line 8 is threadedly connected to the inner wall of the removable filter screen 7.

[0044] A vacuum pressure gauge 13 is fixedly installed on the inner wall of the housing of the mixing machine barrel 17. The detection end of the vacuum pressure gauge 13 is located inside the mixing machine barrel 17, and the observation end of the vacuum pressure gauge 13 is located outside the mixing machine barrel 17.

[0045] Specifically, through the cooperation of the above structures, after the powder and liquid are fully mixed, the opening of the vacuum regulating valve 9 is slowly adjusted by the vacuum-nitrogen purging control interlock system 14 in the control box 15. Then, the vacuum pump 12 and vacuum pump line 21 are used to evacuate the inside of the mixer barrel 17. The pressure inside the mixer barrel 17 is monitored in real time by observing the value on the vacuum pressure gauge 13. During the evacuation process of the mixer barrel 17, under the action of the vacuum-nitrogen purging control interlock system 14, the powder is ensured to be mixed into the product and fully reacted under nitrogen purging. When the secondary filter 10 on the vacuum line 8 or the vacuum regulating valve 9 becomes blocked, the vacuum can be evacuated through the bypass line 20. At this time, the bypass regulating valve 11 and the secondary filter 10 on the bypass line 20 can control and filter the flow rate and powder of the bypass line 20.

[0046] Working principle: Powder and liquid materials are fed into the mixing drum 17 of the dynamic mixer. Then, the stepper motor 18 drives the stirring shaft 2 to rotate inside the mixing drum 17. At this time, the stirring shaft 2 will drive the dispersing disc 3 to mix the materials. During the process of adding powder into the mixing drum 17 and mixing in the mixing drum 17, the powder will float above the mixing drum 17 and come into contact with the mixing head 1.

[0047] At this time, the nitrogen regulating valve 5 is opened by the vacuum-nitrogen purging control interlock system 14 in the control box 15, and then nitrogen is injected into the nitrogen pipeline 4. After passing through the nitrogen pipeline 4, the nitrogen is blown out from the nitrogen branch pipe 6, thereby purging the powder adhering to the inner wall of the dynamic mixer head 1 and the powder floating inside the dynamic mixer barrel 17. Then, under the action of the stirring shaft 2 and the dispersing disk 3, it is mixed with the liquid. During the nitrogen purging process, the nitrogen purging regulating valve 16 on the purging pipeline 19 is opened. At this time, the nitrogen will pass through the purging pipeline 19 to the vacuum pipeline 8 to purge the inside of the vacuum pipeline 8. At the same time, a part of the nitrogen is transported through the vacuum pipeline 8 to the dynamic mixer barrel 17. During the transport process, the nitrogen will purge the detachable filter screen 7.

[0048] After the powder and liquid are fully mixed, the opening of the vacuum regulating valve 9 is slowly adjusted by the vacuum-nitrogen purging control interlock system 14 in the control box 15. Then, the inside of the mixer barrel 17 is evacuated by the vacuum pump 12 and vacuum pump line 21. The pressure inside the mixer barrel 17 is monitored in real time by observing the value on the vacuum pressure gauge 13. During the evacuation process of the mixer barrel 17, the powder is ensured to be mixed into the product and fully reacted under the action of the vacuum-nitrogen purging control interlock system 14. When the secondary filter 10 on the vacuum line 8 or the vacuum regulating valve 9 is blocked, the vacuum can be evacuated through the bypass line 20. At this time, the bypass regulating valve 11 and the secondary filter 10 on the bypass line 20 can control and filter the flow rate and powder of the bypass line 20.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A control device suitable for nitrogen purging dust removal and vacuum filtration systems of dynamic mixers, characterized in that: include: A fixed base (22) is provided with a mixer cylinder (17) on the upper surface of the fixed base (22). A mixer head (1) is fixedly installed on the upper surface of the mixer cylinder (17). A removable filter screen (7) is provided inside the mixer head (1). One end of the removable filter screen (7) extends into the interior of the mixer cylinder (17). A vacuum pump (12) is fixedly installed on the upper surface of the fixed base (22). The vacuum pump (12) is fixedly installed with a vacuum pump pipeline (21) at its input end, and an operation box (15) is fixedly installed on the upper surface of the fixed base (22). The operation box (15) is equipped with a vacuum-nitrogen purging control interlock system (14).

2. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 1, characterized in that, One end of the vacuum pump line (21) is connected to the vacuum line (8) and the bypass line (20), and one end of the bypass line (20) is connected to the side wall of the vacuum line (8).

3. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 2, characterized in that, The vacuum line (8) is fixedly installed with a vacuum regulating valve (9) and a secondary filter (10) at the middle end. The bypass line (20) is fixedly installed with a bypass regulating valve (11) and another secondary filter (10) at the middle end. One end of the vacuum line (8) is threadedly connected to the inner wall of the removable filter screen (7).

4. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 1, characterized in that, A nitrogen pipeline (4) is fixedly installed on the inner wall of the shell cavity of the dynamic mixer head (1). One end of the nitrogen pipeline (4) extends into the interior of the dynamic mixer barrel (17). A nitrogen branch pipe (6) is connected to the outer surface of the nitrogen pipeline (4). The nitrogen branch pipe (6) is located inside the dynamic mixer barrel (17).

5. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 4, characterized in that, The other end of the nitrogen pipeline (4) extends to the outside of the upper surface of the mixer head (1). A nitrogen regulating valve (5) is fixedly installed inside the nitrogen pipeline (4). The nitrogen regulating valve (5) is located above the mixer head (1).

6. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 4, characterized in that, A purge line (19) is installed between the nitrogen line (4) and the vacuum line (8). A nitrogen purge regulating valve (16) is fixedly installed at the middle end of the purge line (19). One end of the purge line (19) is located above the nitrogen regulating valve (5), and the other end is located below the bypass line (20).

7. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 1, characterized in that, A stepper motor (18) is fixedly installed on the upper surface of the head (1) of the dynamic mixer. A stirring shaft (2) is fixedly installed at the output end of the stepper motor (18). One end of the stirring shaft (2) extends into the interior of the material cylinder (17) of the dynamic mixer. Several dispersing discs (3) are fixedly installed on the outer surface of the stirring shaft (2).

8. The control device for nitrogen purging dust removal and vacuum filtration system of a dynamic mixer according to claim 1, characterized in that, A vacuum pressure gauge (13) is fixedly installed on the inner wall of the cavity of the mixing machine barrel (17). The detection end of the vacuum pressure gauge (13) is located inside the mixing machine barrel (17), and the observation end of the vacuum pressure gauge (13) is located outside the mixing machine barrel (17).

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