A stirring device for graphene production

Abstract

This utility model provides a stirring device for graphene production, including a horizontally arranged stirring tank, a stirring mechanism for stirring raw materials in the stirring tank, and a sieve plate movably arranged coaxially. A vibration mechanism and a rotary scraping mechanism are arranged below the sieve plate. The vibration mechanism includes a horizontally arranged movable shaft in the stirring tank, with both ends of the movable shaft rotatably mounted on the inner wall of the stirring tank. One end of the movable shaft is coaxially connected to the output shaft of a first motor that passes through the stirring tank. Several pairs of cams are symmetrically mounted on the movable shaft. The rotation of the cams causes the sieve plate to reciprocate up and down. The rotary scraping mechanism consists of several scrapers arranged radially against the bottom surface of the sieve plate. The inner ends of the scrapers converge and are coaxially fixed to a central shaft seat. The central shaft seat is coaxially rotatably connected to the center of the bottom surface of the sieve plate, and the outer ends are equidistantly distributed along a circumferential trajectory and fixed by a transmission ring coaxial with the sieve plate. The cams have a transmission structure, and when they rotate, they cause the transmission ring to rotate through the transmission structure, thereby cleaning the sieve plate with the scrapers.

Description

Technical Field

[0001] This utility model relates to the field of graphene production, and in particular to a stirring device for graphene production. Background Technology

[0002] In the graphene production process, graphene and solvent are generally mixed using stirring equipment. To improve the purity of the mixture, a filter screen is usually used to filter the graphene raw material. However, traditional filtration equipment cannot vibrate the filter screen, which easily causes the graphene raw material to remain on the filter screen surface, reducing the filtration effect. Therefore, there is an urgent need for a stirring device for graphene production to solve the above-mentioned problems. For example, a stirring device for graphene production mentioned in Chinese Patent Application No. CN202123054402.4 includes a device body, which includes a mixer shell. A first motor is fixedly connected to the top of the mixer shell, and an output shaft is fixedly connected to the bottom of the first motor. The output shaft is inserted into the mixer shell, and a first stirring blade is fixedly connected to the outer wall of the output shaft. A feed port is inserted into the left side of the top of the mixer shell. A filtration mechanism is provided inside the mixer shell, and the filtration mechanism includes a second motor. A second motor is fixedly connected to the right end of the mixer shell. This invention can prevent graphene raw materials from remaining on the surface of the filter screen and causing filter screen blockage, thereby further improving the filtration effect of the filter screen. It also enables the mixer shell to automatically and quickly recover after feeding, preventing raw materials inside the mixer shell from splashing to the outside.

[0003] However, existing technologies similar to the above-mentioned utility models have the following problems: the cam only acts on one side of the filter screen, and the other side only relies on the spring to reset, which causes the forces on both sides to be unbalanced when the filter screen moves up and down, resulting in inconsistent vibration amplitude and frequency, and limited filtration effect. When the cam on one side pushes the filter screen, the filter screen may tilt because the direction of the driving force deviates from the central axis of the filter screen. In addition, residual raw materials are easily generated at the bottom of the filter screen during filtration.

[0004] Therefore, a stirring device with a filtration structure for graphene production is needed to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the issues of stability in vibration filtration and residue cleaning, this invention proposes a stirring device for graphene production, the technical solution of which is as follows.

[0006] A stirring device for graphene production includes a horizontally arranged stirring tank, a stirring mechanism for stirring raw materials is provided in the stirring tank, a sieve plate is coaxially movably arranged, and a vibration mechanism and a rotary scraping mechanism are provided below the sieve plate.

[0007] The vibration mechanism includes a horizontally arranged movable shaft in the mixing tank. The two ends of the movable shaft are respectively rotatably mounted on the inner wall of the mixing tank. One end of the movable shaft is coaxially connected to the output shaft of a first motor that passes through the mixing tank. Several pairs of cams are symmetrically fixedly mounted on the movable shaft. The rotation of the cams causes the sieve plate to move up and down reciprocally.

[0008] The rotary scraping mechanism consists of several scrapers that abut against the bottom surface of the sieve plate arranged radially. The inner ends of the scrapers converge and are coaxially fixed to the central shaft seat. The central shaft seat is coaxially and rotatably connected to the center of the bottom surface of the sieve plate, and the outer ends are equidistantly distributed along the circumferential trajectory and fixed by a transmission ring coaxial with the sieve plate.

[0009] The cam has a transmission structure, and when the cam rotates, the transmission ring rotates around its own axis through the transmission structure.

[0010] Furthermore, the center of the sieve plate is concave downward to form an arc surface, and the mixing tank body above the sieve plate in the vertical direction is a detachable part.

[0011] Furthermore, the stirring mechanism includes a second motor disposed on the outside of the bottom of the stirring tank. The output shaft of the second motor passes through the bottom of the stirring tank and is coaxially fixedly connected to the stirring shaft disposed in the stirring tank. The other end of the stirring shaft is supported by a support mechanism disposed on the inner wall of the stirring tank. The support mechanism enables the stirring shaft to be coaxially disposed in the stirring tank, and the support mechanism and the stirring shaft have no mechanical interference with the rotating scraping mechanism.

[0012] Furthermore, the support mechanism includes several fixed rods disposed on the inner wall of the mixing tank. One end of each fixed rod is fixed at equal intervals to the inner wall of the mixing tank, and the other end points horizontally toward the axis of the mixing shaft. All of them are fixedly connected to a rotating seat coaxially sleeved on the mixing shaft.

[0013] Furthermore, the outer periphery of the sieve plate is provided with several guide blocks, and the inner wall of the mixing tank is provided with several guide grooves along the axial direction. The guide blocks are slidably disposed in the guide grooves, and the guide grooves and guide blocks cooperate to restrict the sieve plate to move only up and down along the axial direction.

[0014] Furthermore, a buffer spring is provided between the upper side of the guide block and the upper side of the guide groove wall, with both ends of the buffer spring fixedly connected to the upper side of the guide block and the upper side of the guide groove wall, respectively.

[0015] Furthermore, the transmission ring includes a plurality of first transmission columns vertically arranged at equal intervals on the lower side of the ring body, and a plurality of second transmission columns arranged on one side of the cam. The plurality of second transmission columns are parallel to the axis of the movable shaft, and the plurality of second transmission columns are arranged in a ring uniformly with the axis of the movable shaft as the center. The rotation of the cam drives the second transmission columns to rotate with the movable shaft as the axis, thereby driving the first transmission columns to move in the circumferential direction, thereby causing the transmission ring to rotate.

[0016] Furthermore, the bottom of the inner side of the mixing tank is set in a cone shape, the axis of the cone is coaxial with the mixing tank, and discharge ports are opened on both sides of the bottom of the mixing tank for easy discharge.

[0017] This invention has the following advantages: By using several symmetrically arranged cams to drive the screen plate to move up and down, and combining the columnar transmission structure between the transmission ring and the cams to drive the radial scraper to rotate synchronously, this invention achieves the dual cleaning effect of balanced vibration and rotational scraping of the screen plate. It eliminates the tilting of the screen plate and the residue of raw materials caused by unilateral force. At the same time, the guide groove and buffer spring constrain the directional movement of the screen plate and absorb the impact. The arc-shaped screen surface promotes the aggregation and discharge of raw materials. Overall, it takes into account the stability of vibration filtration, the efficiency of residue cleaning and the reliability of the equipment structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the first partial structure of the present utility model;

[0020] Figure 3 This is a schematic diagram of the second partial structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the rotary scraping mechanism of this utility model.

[0022] In the above attached figures: 1. Mixing tank; 2. Screen plate; 3. Movable shaft; 4. First motor output shaft; 5. Cam; 6. Second motor output shaft; 7. Scraper; 8. Transmission ring; 9. Central shaft seat; 10. Mixing shaft; 11. Fixed rod; 12. Rotary seat; 13. Guide block; 14. Guide groove; 15. Buffer spring; 16. First transmission column; 17. Second transmission column; 18. Discharge port; 19. Baffle plate. Detailed Implementation

[0023] The present invention will now be described with reference to the accompanying drawings:

[0024] like Figure 1 As shown, a stirring device for graphene production includes a horizontally arranged stirring tank 1, in which a stirring mechanism for stirring raw materials is provided, and a sieve plate 2 is coaxially movably arranged. A vibration mechanism and a rotary scraping mechanism are arranged below the sieve plate 2.

[0025] like Figure 1 , Figure 2 , Figure 3As shown, the vibration mechanism includes a horizontally arranged movable shaft 3 in the mixing tank 1. Both ends of the movable shaft 3 are rotatably mounted on the inner wall of the mixing tank 1. One end of the movable shaft 3 is coaxially connected to the output shaft 4 of a first motor that penetrates the mixing tank 1. Several pairs of cams 5 are symmetrically fixedly mounted on the movable shaft 3. The rotation of the cams 5 causes the sieve plate 2 to reciprocate up and down. The symmetrically arranged pairs of cams 5 drive the sieve plate 2 to move up and down, eliminating the tilting of the sieve plate 2 and vibration imbalance caused by unilateral driving force, thus improving vibration uniformity.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the rotary scraping mechanism consists of several scrapers 7 arranged radially abutting the bottom surface of the screen plate 2. The inner ends of the scrapers 7 converge and are coaxially fixed to the central shaft seat 9. The central shaft seat 9 is rotatably connected to the center of the bottom surface of the screen plate 2, and the outer ends are equidistantly distributed along a circumferential trajectory and fixed by a transmission ring 8 coaxial with the screen plate 2. The radially arranged scrapers 7 rotate with the transmission ring 8, covering the entire circumference of the bottom of the screen plate 2 and scraping synchronously to avoid material residue causing blockage. The coaxial design of the transmission ring 8 ensures that the scraping trajectory matches the movement of the screen plate 2, improving cleaning efficiency.

[0027] like Figure 2 , Figure 3 As shown, the cam 5 has a transmission structure. When the cam 5 rotates, the transmission ring 8 rotates around its own axis through the transmission structure, thereby driving the scraper 7 to move.

[0028] like Figure 1 As shown, preferably, the center of the sieve plate 2 is concave downward to form an arc surface, which uses gravity and vibration inertia to make the raw material gather towards the center, accelerate the filtration through the sieve holes, and reduce the accumulation of material at the edges. In addition, the tank body of the mixing tank 1 above the sieve plate 2 in the vertical direction is a detachable part 20. When too much raw material that cannot be screened accumulates on the sieve plate 2 or when it is necessary to maintain the inside of the mixing tank 1, the detachable part 20 can be disassembled to clean the raw material and maintain and repair the inside of the mixing tank 1. The connection between the detachable part 20 and the mixing tank 1 can be a flange connection or a clamp connection commonly used in industrial production, and the connection is equipped with sealing grooves, sealing rings and other sealing measures. The connection method is existing technology and will not be described in detail here.

[0029] like Figure 1 As shown, preferably, the stirring mechanism includes a second motor disposed on the outer side of the bottom of the stirring tank 1. The output shaft 6 of the second motor passes through the bottom of the stirring tank 1 and is coaxially and fixedly connected to the stirring shaft 10 coaxially disposed in the stirring tank 1. The other end of the stirring shaft 10 is supported by a support mechanism disposed on the inner wall of the stirring tank 1. The support mechanism ensures that the stirring shaft 10 is coaxially disposed in the stirring tank 1, and the support mechanism and the stirring shaft 10 have no mechanical interference with the rotating scraping mechanism.

[0030] like Figure 1 Preferably, the support mechanism includes several fixed rods 11 disposed on the inner wall of the mixing tank 1. One end of each fixed rod 11 is equidistantly fixed to the inner wall of the mixing tank 1, and the other end points horizontally toward the axis of the mixing shaft 10. All rods are fixedly connected to a rotating seat 12 coaxially mounted on the mixing shaft 10. The mixing shaft 10, driven by the second motor, operates stably coaxially through the rotating seat 12 of the support mechanism, avoiding interference with the rotating scraping mechanism and ensuring that the mixing and filtering actions are independently controllable.

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, preferably, the sieve plate 2 is provided with a plurality of guide blocks 13 on its outer periphery, and the inner wall of the mixing tank 1 is provided with a plurality of guide grooves 14 along the axial direction. The guide blocks 13 are slidably disposed in the guide grooves 14. The guide grooves 14 and the guide blocks 13 cooperate to restrict the sieve plate 2 to move only up and down along the axial direction. A buffer spring 15 is provided between the upper side of the guide block 13 and the upper side of the guide groove 14. The two ends of the buffer spring 15 are fixedly connected to the upper side of the guide block 13 and the upper side of the guide groove 14, respectively. The guide grooves 14 restrict the sieve plate 2 to move only up and down along the axial direction, preventing rotational sway; the buffer springs 15 absorb vibration and impact, reducing component wear and noise. Preferably, the sieve plate is provided with a baffle plate 19, which is an annular baffle plate and can be made of PTFE, which has good chemical stability, corrosion resistance, sealing performance, high lubricity and non-stick properties, and is coaxially disposed above the sieve plate 2 to prevent material from entering the guide grooves 14.

[0032] like Figure 2 , Figure 3 , Figure 4 As shown, preferably, the transmission ring 8 includes a plurality of first transmission columns 16 vertically arranged at equal intervals on its lower side, and a plurality of second transmission columns 17 arranged on one side of the cam 5. The plurality of second transmission columns 17 are parallel to the axis of the movable shaft 3 and are arranged in a ring-shaped uniform arrangement with the axis of the movable shaft 3 as the center. The rotation of the cam 5 drives the second transmission columns 17 to rotate around the movable shaft 3, thereby driving the first transmission columns 16 to move in the circumferential direction, thus causing the transmission ring 8 to rotate. The cam 5 drives the first transmission columns 16 of the transmission ring 8 through the ring-shaped and equally spaced second transmission columns 17, converting the rotation of the cam 5 into the continuous rotation of the transmission ring 8, realizing the synchronous linkage between the vibration of the screen plate 2 and the scraping rotation.

[0033] like Figure 1 As shown, preferably, the bottom of the inner side of the mixing tank 1 is set in a cone shape, the axis of the cone is coaxial with the mixing tank 1, and discharge ports 18 are opened on both sides of the bottom of the mixing tank 1 for easy discharge.

[0034] Additionally, it should be noted that the first and second motors need to be independently speed-adjusted to avoid conflicts between stirring and vibration frequencies; the transmission structure needs to be designed with phase synchronization to ensure coordination between the vibration of the sieve plate 2 and the rotation of the scraper; a mechanical seal needs to be installed at the point where the movable shaft 3 passes through the mixing tank 1 to prevent raw material leakage; the discharge port 18 is equipped with a pneumatic valve to achieve sealed unloading; the buffer spring 15 needs to be made of high fatigue life spring steel, and the first and second motors mentioned in this utility model can be geared motors. The circuit connection of the first and second motors is conventional technology and will not be described in detail. The inlet located at the top of the mixing tank 1, the sieve holes opened in the sieve plate 2, the stirring rods installed on both sides of the stirring shaft, etc. are all conventional technologies and will not be specifically described in the instruction manual and drawings.

[0035] The principle of this invention is as follows: A first motor drives the movable shaft 3 and the symmetrical cam 5 to rotate, causing the screen plate 2 to vibrate up and down to filter the raw materials; the cam 5, through the second transmission column 17, links the transmission ring 8 to rotate around the axis, driving the scraper 7 to synchronously scrape the residue at the bottom of the screen plate 2; a second motor independently drives the stirring shaft 10 to mix the raw materials, and a support mechanism ensures the stable operation of the stirring shaft 10. The guide groove 14 and the buffer spring 15 of the screen plate 2 constrain its vertical movement and absorb impact, the conical tank bottom and the arc-shaped screen plate 2 assist in the collection and discharge of raw materials, and the baffle plate 19 prevents raw materials from entering the guide groove 14. The method of use is as follows: first, start the second motor to drive the stirring shaft 10 to premix the raw materials, then turn on the first motor to drive the cam 5 to vibrate and filter the screen plate 2. During the stirring process, the transmission ring 8 drives the scraper 7 to rotate and clean the bottom of the screen plate 2; after filtration, the raw materials are discharged from the double-sided discharge port 18 through the conical tank bottom.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A stirring device for graphene production, characterized by: It includes a horizontally arranged mixing tank (1), in which a mixing mechanism for mixing raw materials is provided, and a sieve plate (2) is coaxially movably arranged. A vibration mechanism and a rotary scraping mechanism are provided below the sieve plate (2). The vibration mechanism includes a horizontally arranged movable shaft (3) in the mixing tank (1). The two ends of the movable shaft (3) are respectively rotatably arranged on the inner wall of the mixing tank (1). One end of the movable shaft (3) is coaxially connected to the first motor output shaft (4) that passes through the mixing tank (1). Several pairs of cams (5) are symmetrically fixedly mounted on the movable shaft (3). The rotation of the cams (5) causes the sieve plate (2) to move up and down reciprocally. The rotary scraping mechanism consists of several scrapers (7) that abut against the bottom surface of the sieve plate (2) arranged radially. The inner ends of the scrapers (7) converge and are coaxially fixed to the central shaft seat (9). The central shaft seat (9) is coaxially and rotatably connected to the center of the bottom surface of the sieve plate (2), and the outer ends are equidistantly distributed along the circumferential trajectory and fixed by a transmission ring (8) coaxial with the sieve plate (2). The cam (5) has a transmission structure. When the cam (5) rotates, the transmission ring (8) rotates around its own axis through the transmission structure.

2. The stirring device for graphene production according to claim 1, characterized in that: The center of the sieve plate (2) is concave downward to form an arc surface, and the tank body of the mixing tank (1) above the sieve plate (2) in the vertical direction is a detachable part (20).

3. The stirring device for graphene production according to claim 1, characterized in that: The stirring mechanism includes a second motor located on the outside of the bottom of the stirring tank (1). The output shaft (6) of the second motor passes through the bottom of the stirring tank (1) and is coaxially fixedly connected to the stirring shaft (10) coaxially arranged in the stirring tank (1). The other end of the stirring shaft (10) is supported by a support mechanism provided on the inner wall of the stirring tank (1). The support mechanism enables the stirring shaft (10) to be coaxially arranged in the stirring tank (1), and the support mechanism and the stirring shaft (10) have no mechanical interference with the rotating scraping mechanism.

4. The stirring device for graphene production according to claim 3, characterized in that: The support mechanism includes several fixed rods (11) set on the inner wall of the mixing tank (1). One end of each fixed rod (11) is fixed at equal intervals to the inner wall of the mixing tank (1), and the other end is horizontally pointed to the axis of the mixing shaft (10). All of them are fixedly connected to the rotating seat (12) coaxially sleeved on the mixing shaft (10).

5. The stirring device for graphene production according to claim 1, characterized in that: The sieve plate (2) is provided with several guide blocks (13) on its outer periphery. The inner wall of the mixing tank (1) is provided with several guide grooves (14) along the axial direction. The guide blocks (13) are slidably disposed in the guide grooves (14). The guide grooves (14) and the guide blocks (13) cooperate to restrict the sieve plate (2) to move only up and down along the axial direction.

6. The stirring device for graphene production according to claim 5, characterized in that: A buffer spring (15) is provided between the upper side of the guide block (13) and the upper side of the guide groove (14). The two ends of the buffer spring (15) are fixedly connected to the upper side of the guide block (13) and the upper side of the guide groove (14), respectively.

7. The stirring device for graphene production according to claim 1, characterized in that: The transmission ring (8) includes several first transmission columns (16) vertically arranged at equal intervals on the lower side of its ring body, and several second transmission columns (17) arranged on one side of the cam (5). The several second transmission columns (17) are parallel to the axis of the movable shaft (3), and the several second transmission columns (17) are arranged in a ring evenly with the axis of the movable shaft (3) as the center. The rotation of the cam (5) drives the second transmission columns (17) to rotate with the movable shaft (3) as the axis, thereby driving the first transmission columns (16) to move in the circumferential direction, thereby causing the transmission ring (8) to rotate.

8. The stirring device for graphene production according to claim 3, characterized in that: The bottom of the inner side of the mixing tank (1) is set in a cone shape, the axis of the cone is coaxial with the mixing tank (1), and the bottom of both sides of the mixing tank (1) are provided with discharge ports (18).

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