Automatic powder feeding device for oligowall carbon nanotube slurry powder production

Abstract

The utility model discloses a kind of automatic powder feeding devices of oligo-wall carbon nanotube slurry production powder, it is related to powder conveying tool technical field, including feeding tank, feeding tank outer side end and inner chamber are respectively equipped with feeding assembly, discharge assembly and transmission component;The utility model is matched by feeding assembly and transmission component, realizes powder feeding and conveying stability, not only can construct negative pressure environment by the air extraction port of feeding kettle in feeding stage, cooperate with the powder in the automatic suction of external powder tank in feeding port, unnecessary manual handling feeding, shorten feeding cycle;It can also be through vibration rod to scatter accumulated powder, filter screen blocks powder into air extraction pump, avoid powder agglomeration to block feeding channel or damage air extraction equipment, while first electronic valve timing on-off control feeding amount, prevent powder excessive influx feeding tank.

Description

Technical Field

[0001] This utility model relates to the technical field of powder transportation equipment, and in particular to an automatic powder feeding device for the production of oligowalled carbon nanotube slurry. Background Technology

[0002] This utility model relates to the field of powder transportation technology, and is particularly applicable to the precise powder conveying scenario in the production process of oligowalled carbon nanotube slurry. Due to the characteristics of fine particle size and easy agglomeration, oligowalled carbon nanotube powder has extremely high requirements for feeding efficiency, conveying stability and quantitative accuracy in the production process. However, existing powder feeding devices have many technical defects in practical applications and are difficult to meet production needs. The specific problems are as follows: In the powder feeding stage, existing equipment mostly relies on manual handling or simple mechanical pushing methods. Manual feeding is inefficient and time-consuming, making it difficult to adapt to the rhythm of continuous slurry production lines. Furthermore, oligowalled carbon nanotube powder is prone to agglomeration and clumping. During manual feeding or conventional mechanical feeding, clumped powder can easily block the feeding channel, leading to feeding interruptions. In addition, existing equipment lacks a precise feeding quantity control mechanism, allowing powder to easily overflow into the feeding box, causing excessive load on subsequent conveying stages and further exacerbating the risk of blockage. In the powder discharging stage, existing equipment relies heavily on manual valve operation for discharge control. It cannot automatically adjust the discharge timing based on powder weight or volume, requiring real-time manual monitoring of the discharge status, increasing operational intensity, and is prone to over- or under-discharge due to delayed manual response, resulting in powder waste or slurry ratio deviations. Some quantitative discharge devices rely on complex sensors and control systems, which are costly and difficult to maintain, making them unsuitable for small and medium-sized slurry production lines. Therefore, improvements are needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic powder feeding device for the production of oligowalled carbon nanotube slurry.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an automatic powder feeding device for oligowalled carbon nanotube slurry production, comprising a feeding box, a protective cover installed on the lower side of one side of the feeding box, and mounting platforms fixed to both the front and rear sides of the feeding box; a feeding platform connected to one side of the top surface of the feeding box, and a discharging platform connected to the other side of the bottom surface of the feeding box; a feeding component, a discharging component, and a conveying component are respectively installed on the outer end and the inner cavity of the feeding box.

[0005] Preferably, the feeding assembly includes a fixed frame installed on one side of the top surface of the feeding box, a feeding vessel installed on the inner side of the fixed frame, a feeding port connected to the middle of the front end of the outer end of the feeding vessel, and an air extraction port connected to the rear end of the outer end of the feeding vessel to cooperate with the feeding port.

[0006] Preferably, a vibrating rod is installed through the middle of the top surface of the feed vessel, and a filter screen that cooperates with the vibrating rod is fixedly connected above the inner cavity of the feed vessel. The filter screen is placed between the feed port and the exhaust port. A first electronic valve is installed on the bottom surface of the feed vessel, and the other end of the first electronic valve is connected to the feed platform.

[0007] Preferably, the transmission assembly includes a first spiral roller laterally rotatably connected to the front and rear ends of the inner cavity of the feeding box, a second spiral roller rotatably connected between the two first spiral rollers, and one end of each of the first and second spiral rollers penetrates one side of the feeding box and is placed inside the protective cover; the other ends of the first and second spiral rollers are fitted with a limiting platform fixed to the bottom surface of the inner cavity of the feeding box, and the rear first spiral roller penetrates the protective cover; the rear first spiral roller is connected to a stepper motor via a coupling.

[0008] Preferably, a toothed first transmission wheel is sleeved on the outer side of one end of each of the two first spiral rollers, and a toothed second transmission wheel is sleeved on the outer side of one end of each of the rear ends of the first and second spiral rollers. The first and second transmission wheels are both located inside the protective cover, and the second transmission wheel is located on one side of the first transmission wheel. A first transmission belt with a toothed groove structure is sleeved between the two first transmission wheels, and a second transmission belt with a toothed groove structure is sleeved between the two second transmission wheels.

[0009] Preferably, the discharge assembly includes a second electronic valve installed on the bottom surface of the discharge platform, and a stacking pipe is installed at the other end of the second electronic valve. An adsorption platform is installed on the bottom surface of the stacking pipe, and multiple discharge slots are equidistantly opened on the outer side below the stacking pipe. A guide pipe is threadedly connected to the outer side of the middle part of the stacking pipe, and a stacking platform with a trapezoidal cross-section is slidably connected to the inner cavity of the stacking pipe.

[0010] Preferably, a telescopic rod is installed on the bottom surface of the stacking pipe, a spring is installed in the inner cavity of the telescopic rod, and a bearing is sleeved on the upper periphery of the telescopic rod; a locking rod that cooperates with the adsorption platform is vertically installed on the bottom surface of the telescopic rod, and sliding grooves that cooperate with the locking rod are opened on the top surface, bottom surface and inner bottom surface of the telescopic rod and the stacking pipe, and the diameter of the locking rod is smaller than the inner diameter of the spring.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves stable powder feeding and conveying through the cooperation of the feeding component and the conveying component. It not only creates a negative pressure environment through the exhaust port of the feeding vessel during the feeding stage, automatically sucking in powder from the external powder tank without manual handling, thus shortening the feeding cycle; it also uses a vibrating rod to disperse accumulated powder and a filter screen to prevent powder from entering the exhaust pump, avoiding powder agglomeration that could block the feeding channel or damage the exhaust equipment. Simultaneously, a first electronic valve controls the feeding amount at regular intervals to prevent excessive powder from entering the feeding box. During the conveying stage, a stepper motor drives the first spiral roller via a coupling, and together with the first and second transmission wheels and the first and second transmission belts, drives the first and second spiral rollers to rotate synchronously, ensuring uniform powder conveying within the feeding box. A protective cover protects the transmission components from dust corrosion, and a limiting platform stabilizes the spiral roller's operation, reducing conveying deviation.

[0012] 2. This utility model device achieves precise powder discharge and zero-waste conveying through the discharge component. The stacking platform inside the stacking pipe, in conjunction with the telescopic rod, spring, and adsorption platform, can automatically adjust the discharge according to the powder weight. After the powder enters the stacking platform through the second electronic valve, the weight presses down on the stacking platform, causing the telescopic rod to compress the spring, which in turn moves the locking rod down to the energized adsorption platform. The adsorption platform locks the locking rod through electromagnetic force. At this time, the stacking platform is exactly moved to the discharge trough position of the stacking pipe, and the powder is discharged in an orderly manner under the action of gravity. After the adsorption platform is de-energized, the spring resets and pushes the stacking platform and locking rod back to the initial position, completing one discharge cycle without manual intervention to start or stop the discharge. At the same time, the single discharge volume can be calculated through the diameter parameters of the stacking platform and the stacking pipe to achieve quantitative powder feeding and avoid the impact of the slurry ratio on the feeding amount deviation. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the second spiral roller structure proposed in this utility model; Figure 3 This is a half-sectional schematic diagram of the overall structure proposed in this utility model; Figure 4 The present utility model proposes Figure 3 Enlarged diagram of part A in the middle.

[0014] The components in the diagram are numbered as follows: 1. Feeding box; 2. Protective cover; 3. Mounting platform; 4. Feeding platform; 5. Discharge platform; 6. Fixing frame; 7. Feeding vessel; 8. Feeding port; 9. Air extraction port; 10. Vibrating rod; 11. Filter screen; 12. First electronic valve; 13. First spiral roller; 14. Second spiral roller; 15. Locking rod; 16. First transmission wheel; 17. Second transmission wheel; 18. First transmission belt; 19. Second transmission belt; 20. Stepper motor; 21. Limiting platform; 22. Second electronic valve; 23. Stacking pipe; 24. Adsorption platform; 25. Guide tube; 26. Stacking platform; 27. Telescopic rod; 28. Spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Example: See Figures 1 to 4This utility model discloses an automatic powder feeding device for the production of oligowalled carbon nanotube slurry, comprising a feeding box 1. The feeding box 1 facilitates the subsequent installation of feeding components, discharging components, and conveying components. The feeding box 1 and the components installed on its outer and inner ends are all connected to an external control system. A protective cover 2 is installed on the lower side of one side of the feeding box 1 to protect the first transmission wheel 16, the second transmission wheel 17, the first transmission belt 18, and the second transmission belt 19 of the conveying components. Mounting platforms 3 are fixedly connected to both the front and rear ends of the feeding box 1. The mounting platforms 3 facilitate the subsequent mounting of the equipment on the base surface of the corresponding support for limiting and fixing the entire equipment. A feeding platform 4 is connected to one side of the top surface of the feeding box 1 for feeding. Platform 4 facilitates connection to the first electronic valve 12 via an external flange and bolts; and a discharge platform 5 is connected to the other side of the bottom surface of the feeding box 1; the discharge platform 5 facilitates subsequent connection to the external second electronic valve 22 via an external flange and bolts; a feeding assembly, a discharge assembly, and a transfer assembly are respectively installed on the outer end and inner cavity of the feeding box 1. The feeding assembly includes a fixing frame 6 installed on one side of the top surface of the feeding box 1, which facilitates the installation of the limiting feed vessel 7 via an external mounting assembly; the feed vessel 7 is installed on the inner end above the fixing frame 6, which facilitates the subsequent entry and accumulation of powder materials; a feed port 8 is connected to the middle of the front end of the outer end of the feed vessel 7, which facilitates connection to the external connecting pipe via an external mounting assembly. The feed vessel 7 is connected to an external connecting pipe and a powder tank. An exhaust port 9, corresponding to the feed port 8, is installed at the rear end of the outer side of the feed vessel 7. The exhaust port 9 facilitates connection to an external connecting pipe via an external mounting assembly. The other end of the external connecting pipe connects to an external air pump to provide a negative pressure environment for the feed vessel 7, allowing powder from the external powder tank to be drawn into the feed vessel 7's inner cavity via the feed port 8. A vibrating rod 10 is installed through the center of the top surface of the feed vessel 7. The vibrating rod 10 disperses the powder material entering the feed vessel 7 and accumulating at one end of the first electronic valve 12, preventing accumulation. A filter screen 11, through which the vibrating rod 10 passes, is fixed above the inner cavity of the feed vessel 7 and positioned at the feed port 8. Between the feed vessel 7 and the exhaust port 9, a filter screen 11 is used to prevent powder entering the feed vessel 7 from entering the external exhaust pump through the exhaust port 9 and causing damage to the exhaust pump; a first electronic valve 12 is installed on the bottom surface of the feed vessel 7, and the other end of the first electronic valve 12 is connected to the feed platform 4. The first electronic valve 12 facilitates the opening and closing of the feed vessel 7 and the inner cavity of the feeding box 1; the transmission assembly includes a first spiral roller 13 that is laterally rotatably connected to the front and rear ends of the inner cavity of the feeding box 1, and a second spiral roller 14 is rotatably connected between the two first spiral rollers 13. One end of the first spiral roller 13 and the second spiral roller 14 both penetrate one side of the feeding box 1 and are placed inside the protective cover 2; the first spiral roller 13 and the second spiral roller 14 facilitate the transportation of powder materials entering the inner cavity of the feeding box 1;The other ends of the first spiral roller 13 and the second spiral roller 14 are fitted with limiting platforms 21 fixed to the bottom surface of the inner wall of the feeding box 1. The limiting platforms 21 facilitate the use of the protective cover 2 to limit the first spiral roller 13 and the second spiral roller 14. The rear end of the first spiral roller 13 passes through the protective cover 2. The rear end of the first spiral roller 13 is connected to a stepper motor 20 via a coupling. The stepper motor 20 facilitates the connection between the rear end of the first spiral roller 13 and the first spiral roller 14 via the coupling, and drives the rear end of the first spiral roller 13 to rotate. Each of the two first spiral rollers 13 has a toothed first transmission wheel 16 sleeved on the outer side of one end. The first transmission wheel 16 facilitates the connection to the first transmission belt 18, and the first transmission belt 18 drives the front end of the first spiral roller 13 to rotate. The rear end of the first spiral roller 14 is also connected to the first transmission belt 14 via a limiting platform 21 fixed to the bottom surface of the feeding box 1. The limiting platform 21 facilitates the use of the protective cover 2 to limit the first spiral roller 13 and the second spiral roller 14 to rotate. Both the spiral roller 13 and the second spiral roller 14 have a toothed second transmission wheel 17 sleeved on one outer side. The first transmission wheel 16 and the second transmission wheel 17 are both located inside the protective cover 2. The second transmission wheel 17 facilitates the connection of the second transmission belt 19, and the second transmission belt 19 drives the second spiral roller 14 to rotate. The second transmission wheel 17 is located on one side of the first transmission wheel 16, and a first transmission belt 18 with a matching toothed structure is sleeved between the two first transmission wheels 16, and a second transmission belt 19 with a matching toothed structure is sleeved between the two second transmission wheels 17. The first transmission belt 18 serves as a "transmission bridge" between the two first transmission wheels 16, and the second transmission belt 19 serves as a "transmission bridge" between the two second transmission wheels 17.

[0017] In this invention, the discharge assembly includes a second electronic valve 22 installed on the bottom surface of the discharge platform 5, which facilitates the switching of the feeding box 1 and the stacking pipe 23. The other end of the second electronic valve 22 is connected to the stacking pipe 23, which facilitates the connection of a guide pipe 25 via a thread and allows for the sliding installation of the stacking platform 26 along its inner wall, thus limiting the position of the stacking platform 26. An adsorption platform 24 is connected to the bottom surface of the stacking pipe 23, which facilitates the subsequent adsorption of the locking rod 15, thereby limiting the position of the stacking platform 26. The adsorption platform 24 is energized and acts as an electromagnet to adsorb and limit the locking rod 15. Multiple discharge slots are equidistantly arranged on the outer side below the stacking pipe 23. A guide pipe 25 is threadedly connected to the outer side of the middle section of the stacking pipe 23, which facilitates the limiting of subsequent powder materials. Furthermore, a stacking platform 26 with a trapezoidal cross-section is slidably connected to the inner cavity of the stacking pipe 23, which facilitates the stacking of powdered materials from the second electronic valve 22. A telescopic rod 27 is installed on the inner bottom surface of the stacking pipe 23, which facilitates installation and positioning with the stacking platform 26 in conjunction with external bearings and external limiting components. A spring 28 is installed in the inner cavity of the telescopic rod 27, which provides support for the telescopic rod 27. A bearing is sleeved on the upper periphery of the telescopic rod 27. A locking rod 15 that cooperates with the adsorption platform 24 is vertically installed on the bottom surface of the telescopic rod 27, which facilitates subsequent positioning of the stacking platform 26 in conjunction with the adsorption platform 24. Sliding grooves for the locking rod 15 are provided on the top, bottom, and inner bottom surfaces of the telescopic rod 27 and the stacking pipe 23, and the diameter of the locking rod 15 is smaller than the inner diameter of the spring 28.

[0018] Working principle: When using this utility model, the operator uses an external machine to fix the entire equipment to the mounting platforms 3 on both the front and rear sides of the feeding box 1, thus fixing the equipment on the external base (the external feeding components are located below the base). Then, the operator connects the feeding port 8 to the external powder tank through the external flexible connecting pipe, connects the air extraction port 9 to the external air extraction pump, and then threads the guide pipe 25 to the stacking pipe 23. Finally, the operator powers on the equipment. After the equipment is powered on, the operator starts the external air pump and vibrator 10 through the external operating system. The air pump extracts air from the feed vessel 7, creating a negative pressure inside the feed vessel 7. Powder from the external powder tank is drawn through the external connecting pipe to the feed port 8 and then into the inner cavity of the feed vessel 7. The filter screen 11 prevents powder from entering the external air pump through the air extraction port 9. The powder entering the feed vessel 7 will accumulate at one end of the first electronic valve 12. The vibrator 10 will vibrate and disperse the powder. The fixing frame 6 connects the feed vessel 7 to the feeding box 1 to reduce the resonance effect generated by the vibrator 10 during operation. Electronic valve 12 will automatically open within a certain time period, allowing the powder accumulated at one end to enter the feeding box 1 through the feeding platform 4. This cycle is repeated. Then, stepper motor 20 is started, which drives the first spiral roller 13 at the rear end to rotate. The first spiral roller 13 at the rear end will drive the first spiral roller 13 at the front end to rotate through the first transmission wheel 16 and the first transmission belt 18 installed inside the protective cover 2. The second transmission wheel 17 and the second transmission belt 19 will drive the second spiral roller 14 to rotate. The rotation of the first spiral roller 13 and the second spiral roller 14 will carry the powder that has entered the inner cavity of the feeding box 1. Moving towards the discharge platform 5, the limiting platform 21 ensures the smooth rotation of the first spiral roller 13 and the second spiral roller 14. The powder enters the upper end of the stacking platform 26, which is slidably connected to the inner cavity of the stacking pipe 23, through the second electronic valve 22. As the powder increases, the stacking platform 26 will move downward, squeezing the telescopic rod 27 and the spring 28 installed in the inner cavity of the telescopic rod 27. During the downward movement of the stacking platform 26, the locking rod 15 fixed to the bottom surface will also move downward. When the locking rod 15 reaches the energized adsorption platform 24, the adsorption platform 24, under the action of electromagnetic induction, adsorbs and limits the locking rod 15, thereby limiting the stacking platform 26. (When the locking rod 15 is limited by the stacking platform 26, the second electronic valve 22 is closed.) At this time, the stacking platform 26 also descends to the discharge chute below the stacking pipe 23. The powder is discharged through the discharge chute under the action of gravity. Then, the power supply to the adsorption platform 24 is stopped to release the limitation on the locking rod 15, so that the locking rod 15 is reset under the action of the spring 28. At the same time, the second electronic valve 22 is opened. This is used as a cycle to collect powder (the device can calculate the volume of powder released each time based on the diameter of the stacking platform 26, the second electronic valve 22 and the stacking pipe 23, and then calculate the approximate powder gravity).

[0019] 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. An automatic powder feeding device for the production of oligowalled carbon nanotube slurry, comprising a feeding box (1), characterized in that: A protective cover (2) is installed on one side of the feeding box (1), and mounting platforms (3) are fixed to both the front and rear sides of the feeding box (1); a feeding platform (4) is connected to one side of the top surface of the feeding box (1), and a discharging platform (5) is connected to the other side of the bottom surface of the feeding box (1); a feeding assembly, a discharging assembly and a transmission assembly are respectively installed on the outer end and the inner cavity of the feeding box (1).

2. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 1, characterized in that: The feeding assembly includes a fixed frame (6) installed on one side of the top surface of the feeding box (1), a feeding vessel (7) is installed on the inner side of the fixed frame (6), a feeding port (8) is connected to the middle of the front end of the outer side of the feeding vessel (7), and an air extraction port (9) that matches the feeding port (8) is connected to the rear end of the outer side of the feeding vessel (7).

3. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 2, characterized in that: A vibrating rod (10) is installed through the middle of the top surface of the feed vessel (7), and a filter screen (11) that cooperates with the vibrating rod (10) is fixedly connected above the inner cavity of the feed vessel (7). The filter screen (11) is placed between the feed port (8) and the air extraction port (9). A first electronic valve (12) is installed on the bottom surface of the feed vessel (7), and the other end of the first electronic valve (12) is connected to the feed platform (4).

4. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 1, characterized in that: The transmission assembly includes a first spiral roller (13) that is laterally rotatably connected to the front and rear ends of the inner cavity of the feeding box (1), and a second spiral roller (14) that is rotatably connected between the two first spiral rollers (13). One end of the first spiral roller (13) and the second spiral roller (14) both penetrate one side of the feeding box (1) and are placed inside the protective cover (2). The other end of the first spiral roller (13) and the second spiral roller (14) is equipped with a limiting platform (21) that is fixed to the bottom surface of the inner cavity of the feeding box (1), and the rear end of the first spiral roller (13) penetrates the protective cover (2). The rear end of the first spiral roller (13) is connected to a stepper motor (20) through a coupling.

5. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 4, characterized in that: Two first spiral rollers (13) are each fitted with a toothed first transmission wheel (16) on one side of each end, and two toothed second transmission wheels (17) are fitted on one side of each end of the first spiral roller (13) and the second spiral roller (14). The first transmission wheel (16) and the second transmission wheel (17) are both placed inside the protective cover (2). The second transmission wheel (17) is placed on one side of the first transmission wheel (16). A first transmission belt (18) with a toothed structure is fitted between the two first transmission wheels (16), and a second transmission belt (19) with a toothed structure is fitted between the two second transmission wheels (17).

6. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 1, characterized in that: The discharge assembly includes a second electronic valve (22) installed on the bottom surface of the discharge platform (5). The other end of the second electronic valve (22) is equipped with a stacking pipe (23). The bottom surface of the stacking pipe (23) is connected to an adsorption platform (24). Multiple discharge slots are equidistantly opened on the outer side below the stacking pipe (23). A guide pipe (25) is threadedly connected to the outer side of the middle part of the stacking pipe (23). The inner cavity of the stacking pipe (23) is slidably connected to a stacking platform (26) with a trapezoidal cross-section.

7. The automatic powder feeding device for oligowalled carbon nanotube slurry production according to claim 6, characterized in that: A telescopic rod (27) is installed on the inner bottom surface of the stacking pipe (23). A spring (28) is installed in the inner cavity of the telescopic rod (27), and a bearing is sleeved on the upper periphery of the telescopic rod (27). A locking rod (15) that cooperates with the adsorption platform (24) is vertically installed on the bottom surface of the telescopic rod (27). The top surface, bottom surface and inner bottom surface of the telescopic rod (27) and the stacking pipe (23) are all provided with sliding grooves that cooperate with the locking rod (15). The diameter of the locking rod (15) is smaller than the inner diameter of the spring (28).

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