Mixing machine for preparing a heat-conducting material and mixing method

Abstract

The application relates to the technical field of mixing equipment, and particularly provides a mixing machine for preparing heat-conducting materials and a mixing method, which comprises a rack, a mixing cylinder with an upper part smaller in diameter than a lower part is vertically arranged on the rack, a sealing plate capable of moving axially is further arranged at the bottom of the mixing cylinder, so that the mixture in the mixing cylinder can be in different diameter mixing cylinders, a stirring impeller is arranged on the rack, and the rotating speed of the stirring impeller and the length of the stirring blade are different when the stirring impeller and the stirring blade are in different diameter mixing cylinders, so that the powdery and liquid heat-conducting materials are first pre-stirred at a low speed in the lower part of the mixing cylinder with a large diameter, the powdery heat-conducting materials can enter below the liquid surface, the powdery heat-conducting materials are prevented from splashing everywhere, gas is prevented from entering, the powdery and liquid heat-conducting materials are then stirred at a high speed in the upper part of the mixing cylinder with a small diameter, the powdery and liquid heat-conducting materials are efficiently mixed, the mixing effect of the powdery and liquid heat-conducting materials is enhanced, and the mixing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and in particular to a mixer and mixing method for preparing thermally conductive materials. Background Technology

[0002] Mixing equipment is a type of machinery widely used in industrial production to uniformly mix two or more materials together through mechanical force, heat energy, or other actions. It has important applications in industries such as chemical, pharmaceutical, food processing, building materials, and metallurgy. In the preparation of thermally conductive materials, it is necessary to mix two or more materials with different thermal conductivity properties in a certain proportion, and after uniform mixing, further processing is carried out to complete the preparation of the thermally conductive material.

[0003] For example, Chinese patent CN113304676A discloses a preparation device for processing high thermal conductivity materials, including a preparation box and a feeding funnel. The feeding funnel is set on the preparation box and the two are connected. The preparation box is also provided with a discharge port for discharging the feed material. It also includes a stirring system set in the preparation box for stirring the preparation raw materials.

[0004] When powdered and liquid thermal conductive materials are mixed, if the liquid level is too shallow, it is easier to stir the powdered thermal conductive material on the top layer into the liquid, but clumps of powder will appear, which can easily stir air into the liquid. If the liquid level is too high, the powdered thermal conductive material will not be easily stirred into the liquid, reducing the mixing effect and efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a mixer and mixing method for preparing thermal conductive materials to address the problem of poor mixing effect between powdered and liquid thermal conductive materials.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A mixer for preparing thermally conductive materials, comprising:

[0008] A frame, on which a mixing cylinder is vertically arranged, the mixing cylinder having upper and lower parts, the diameter of the upper part of the mixing cylinder being smaller than the diameter of the lower part of the mixing cylinder, and a sealing plate being axially slidably arranged at the bottom of the mixing cylinder, the sealing plate being in contact with the mixture inside the mixing cylinder;

[0009] The impeller is capable of moving axially within the mixing cylinder, and the impeller blades are capable of radial extension and retraction. The impeller and the sealing plate move axially synchronously.

[0010] When the sealing plate is located at the bottom end of the lower part of the mixing cylinder, the stirring impeller is located at the lower part of the mixing cylinder at a first rotational speed, and the length of the stirring blades of the stirring impeller is adapted to the diameter of the lower part of the mixing cylinder;

[0011] When the sealing plate is located at the bottom of the upper part of the mixing cylinder, the stirring impeller is located at the upper part of the mixing cylinder at a second rotational speed. The length of the stirring blades of the stirring impeller is adapted to the diameter of the upper part of the mixing cylinder, and the first rotational speed is less than the second rotational speed.

[0012] Furthermore, the stirring impeller includes a stirring shaft and a rotating base plate. One end of the stirring shaft is connected to the frame, and the other end of the stirring shaft is coaxial and fixedly connected to the rotating base plate. A plurality of sliding rods are evenly slidably arranged on the outer periphery of the rotating base plate. The plurality of sliding rods are radially distributed along the rotating base plate. A stirring blade is connected to the end of the plurality of sliding rods away from the rotating base plate. A rotating gear is rotatably arranged between adjacent sliding rods. The rotating gear meshes with the outer periphery of two sliding rods. Two sliding rods meshing with the same rotating gear form a group.

[0013] When the rotating substrate is located in the lower part of the mixing cylinder, one of the slide rods in each group is retracted into the rotating substrate, while the other extends out of the rotating substrate, and the weight of the slide rod retracted into the rotating substrate is greater than the weight of the slide rod extending out of the rotating substrate.

[0014] Furthermore, an elastic element is connected to one of the slide bars in each group, and the other end of the elastic element is fixedly connected to the rotating base plate.

[0015] Furthermore, the frame has a telescopic part that can extend and retract in the vertical direction. When the telescopic part extends and retracts, it drives the stirring shaft to move axially in the mixing cylinder. A first drive motor is fixedly installed on the telescopic part, and the first drive motor drives the stirring shaft to rotate around its own axis.

[0016] Furthermore, the frame is equipped with a second drive motor and a transmission chain. The transmission chain is rotatably connected to the frame, and its outer periphery is connected to the telescopic part. The rotation of the transmission chain can drive the telescopic part to extend and retract. The shaft of the second drive motor meshes with the transmission chain.

[0017] Furthermore, the frame is provided with a telescopic component, the fixed end of which is connected to the frame, and the telescopic end of which is connected to the sealing plate. The telescopic component can drive the sealing plate to move.

[0018] Furthermore, a clamping mechanism is provided on the frame to fix the mixing cylinder on the frame.

[0019] Furthermore, the clamping mechanism includes two symmetrically arranged jaws located on the outer periphery of the mixing cylinder, with the two jaws close to each other to clamp the mixing cylinder.

[0020] Furthermore, a discharge pipe is connected to the side wall near the bottom of the lower part of the mixing cylinder, and a switch is installed on the discharge pipe.

[0021] The present invention also provides a mixing method for preparing thermally conductive materials, comprising at least the following steps:

[0022] S100: Prepare powdered and liquid thermal conductive materials;

[0023] S200: Powdered and liquid heat-conducting materials are introduced into the lower part of the mixing drum for low-speed pre-stirring;

[0024] S300: After low-speed pre-mixing is completed, the sealing plate moves upward to push the pre-mixed liquid into the upper part of the mixing drum for high-speed mixing.

[0025] S400: After high-speed mixing is completed, the sealing plate moves downward to reset and pushes the mixed liquid back into the lower part of the mixing drum to discharge the mixed liquid.

[0026] The beneficial effects of this invention are:

[0027] This invention features a mixing cylinder with an upper diameter smaller than the lower diameter. The mixing cylinder also includes an axially movable sealing plate to change the position of the mixed materials. Furthermore, the rotation speed of the stirring shaft and the length of the stirring blades differ within the mixing cylinder of different diameters. This allows the powdered and liquid heat-conducting materials to be pre-stirred at low speed in the lower part of the larger diameter mixing cylinder, enabling the powdered material to penetrate below the liquid surface, preventing it from splashing everywhere and avoiding gas entry. Then, the powdered and liquid heat-conducting materials are stirred at high speed in the upper part of the smaller diameter mixing cylinder, resulting in efficient mixing of the powdered and liquid materials. This enhances the mixing effect and improves mixing efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a mixer for preparing thermally conductive materials according to an embodiment of the present invention;

[0029] Figure 2 This is an exploded view of a mixer for preparing thermally conductive materials according to an embodiment of the present invention;

[0030] Figure 3 This is an exploded view of the rotating substrate of a mixer for preparing thermally conductive materials according to an embodiment of the present invention;

[0031] Figure 4This is a schematic diagram of the cover plate structure of a mixer for preparing thermally conductive materials according to an embodiment of the present invention;

[0032] Figure 5 for Figure 1 A front view of a mixer for preparing thermally conductive materials provided in one embodiment;

[0033] Figure 6 for Figure 5 A cross-sectional view along AA during low-speed pre-stirring of a mixer for preparing thermally conductive materials according to one embodiment;

[0034] Figure 7 for Figure 5 A cross-sectional view along BB during low-speed pre-stirring of a mixer for preparing thermally conductive materials according to one embodiment;

[0035] Figure 8 for Figure 7 A partially enlarged view of part X of the mixer for preparing thermally conductive materials provided in one embodiment;

[0036] Figure 9 for Figure 5 A cross-sectional view along AA of a mixer used for preparing thermally conductive materials according to one embodiment;

[0037] Figure 10 for Figure 5 A cross-sectional view along CC of a mixer used for preparing thermally conductive materials according to one embodiment during high-speed stirring;

[0038] Figure 11 for Figure 10 A partially enlarged view of part Y of the mixer for preparing thermally conductive materials provided in one embodiment.

[0039] in:

[0040] 100. Frame; 110. Vertical rod; 120. Horizontal plate; 130. Drive chain; 140. First drive motor; 150. Second drive motor; 160. Telescopic component; 170. Gripper; 180. Support rod;

[0041] 200. Mixing cylinder; 210. Sealing plate; 220. Stirring shaft; 230. Rotating base plate; 240. Annular plate; 241. Threaded groove; 250. Sector block; 251. Rotating gear; 252. Rotating shaft; 253. Screw; 260. First slide rod; 261. Second slide rod; 262. Rack; 270. Stirring blade; 280. Cover plate; 281. Rectangular groove; 282. Sealing gasket; 283. Round hole; 290. Discharge pipe; 291. Switch. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] The following reference Figures 1-11 This invention describes a mixer for preparing thermally conductive materials.

[0046] A mixer for preparing thermally conductive materials is suitable for mixing powdered and liquid thermally conductive materials. It includes a frame 100 with a vertically arranged mixing drum 200. The powdered and liquid thermally conductive materials to be mixed are fed into the mixing drum 200 for mixing. However, the amount of material introduced into the mixing drum 200 is uncertain. If the liquid level is too shallow, it is easier to stir the top layer of powdered thermally conductive material into the liquid, resulting in clumps in the mixture and easy incorporation of air into the mixture. Existing technology adds a step of using a defoamer to remove air bubbles from the material, significantly reducing mixing efficiency. If the liquid level is too high, the powdered thermally conductive material is not easily stirred into the mixture, resulting in poor mixing effect.

[0047] Therefore, the present invention will improve the structure of the mixing cylinder 200, such as... Figure 1 and Figure 2 As shown, the mixing cylinder 200 of the present invention has upper and lower parts. The diameter of the upper part of the mixing cylinder 200 is smaller than that of the lower part. Both the upper and lower ends of the mixing cylinder 200 are open. A sealing plate 210 is slidably disposed at the bottom of the mixing cylinder 200. The outer periphery of the sealing plate 210 is in sliding sealing contact with the inner wall of the lower part of the mixing cylinder 200. The sealing plate 210 can move along the axial direction of the mixing cylinder 200, and the sealing plate 210 can only move within the lower part of the mixing cylinder 200. In the initial state, the sealing plate 210 is located at the bottom end of the lower part of the mixing cylinder 200. When powdered and liquid heat-conducting materials are introduced into the mixing cylinder 200, the heat-conducting materials will enter the lower part of the mixing cylinder 200. It should be noted that the amount of heat-conducting material filled cannot exceed the maximum amount of heat-conducting material that the lower part of the mixing cylinder 200 can hold. Filling is stopped after filling is completed.

[0048] An impeller is installed inside the mixing cylinder 200. The impeller agitates the heat-conducting material within the mixing cylinder 200 and can move axially within the mixing cylinder 200, moving synchronously with the sealing plate 210. Initially, the sealing plate 210 is located at the bottom of the lower part of the mixing cylinder 200, which is filled with powdered and liquid heat-conducting materials. The impeller begins agitation at a relatively slow initial rotational speed. The length of the impeller blades 270 is adapted to the larger diameter of the lower part of the mixing cylinder 200. It is understood that the larger diameter of the lower part of the mixing cylinder 200 results in a relatively low liquid level. Using a slower rotational speed and longer blades 270 ensures initial contact and gradual dispersion of the powdered and liquid heat-conducting materials. The advantages of agitation within the lower part of the mixing cylinder 200 are as follows:

[0049] Reduced splashing: Due to the low liquid level and slow stirring speed, the powdered heat-conducting material is prevented from splashing out due to vigorous stirring or airflow disturbance.

[0050] Gentle dispersion: The slow-rotating stirring blades 270, which are relatively long, provide more uniform stirring and prevent powdered heat-conducting materials from scattering on the liquid surface or generating mist floating in the air.

[0051] Uniform flow: The longer stirring blades 270 provide a wide range of flow and mixing.

[0052] After the powdered and liquid heat-conducting materials are stirred in the lower part of the mixing cylinder 200, they are initially mixed. At this time, both the sealing plate 210 and the stirring impeller move upward along the axial direction of the mixing cylinder 200. The sealing plate 210 stops after moving to the bottom of the upper part of the mixing cylinder 200. The sealing plate 210 pushes the initially mixed powdered and liquid heat-conducting materials into the upper part of the mixing cylinder 200. The diameter of the upper part of the mixing cylinder 200 is smaller than that of the lower part, so the liquid level in the upper part will increase. At this time, the stirring impeller rotates at a second rotational speed, which is greater than the first rotational speed. When the stirring impeller enters the upper part of the mixing cylinder 200, the stirring blades 270 of the stirring impeller will shorten so as not to affect the stirring impeller entering the upper part of the mixing cylinder 200. The length of the stirring blades 270 of the stirring impeller is adapted to the shorter diameter of the upper part of the mixing cylinder 200. The advantages of stirring and mixing in the upper part of the mixing cylinder 200 are as follows:

[0053] High shear force: The high-speed rotating stirring blades 270, which are relatively short, can generate strong shear force, effectively breaking up powder clumps and gradually refining their size.

[0054] Improved dispersion efficiency: The high-speed rotating stirring blades 270, with their short length, provide rapid and efficient shearing, ensuring uniform mixing.

[0055] Understandably, the powdered and liquid thermal conductive materials are first pre-stirred at low speed in the lower part of the large-diameter mixing cylinder 200 to allow the powdered thermal conductive materials to enter below the liquid surface, preventing the powdered thermal conductive materials from splashing everywhere and avoiding the entry of gas. Then, they are stirred at high speed in the upper part of the small-diameter mixing cylinder 200, which makes the powdered and liquid thermal conductive materials mix efficiently, enhances the mixing effect of the powdered and liquid thermal conductive materials, and improves the mixing efficiency.

[0056] Specifically, the stirring impeller of the present invention includes a stirring shaft 220 and a rotating base plate 230. One end of the stirring shaft 220 is connected to the frame 100, and the other end of the stirring shaft 220 is coaxial and fixedly connected to the rotating base plate 230. A plurality of sliding rods are evenly slidably arranged on the outer periphery of the rotating base plate 230. The plurality of sliding rods are radially distributed along the rotating base plate 230. A stirring blade 270 is fixedly connected to the end of the plurality of sliding rods away from the rotating base plate 230. The sliding rods are square rods to prevent the sliding rods from rotating around their own axis. A rotating gear 251 is rotatably arranged between adjacent sliding rods on the rotating base plate 230. The rotating gear 251 meshes with the sliding rods on both sides at the same time. A rack 262 is arranged on the side of the sliding rod close to the rotating gear 251. The rack 262 meshes with the rotating gear 251. The sliding rods on both sides of the same rotating gear 251 are set as a group.

[0057] like Figures 6-8As shown, when the sealing plate 210 is located at the bottom of the lower part of the mixing cylinder 200, the rotating base plate 230 is located inside the lower part of the mixing cylinder 200. One of the slide rods in each group is retracted inside the rotating base plate 230, while the other slide rod in each group extends completely out of the rotating base plate 230. For ease of description, it is referred to as... Figure 8 As shown, the slide bar originally recessed inside the rotating base plate 230 is named the first slide bar 260, and the other slide bar originally extending out of the rotating base plate 230 is named the second slide bar 261. This ensures that each group on the outer periphery of the rotating base plate 230 has a longer slide bar, namely the second slide bar 261. This allows the overall length of the stirring blades 270 on the second slide bar 261 and the second slide bar 261 to be adapted to the longer diameter of the lower part of the mixing cylinder 200. Furthermore, the weight of the first slide bar 260 is greater than the weight of the second slide bar 261 (different weights can be used). (By changing the weight using materials), when the stirring shaft 220 drives the rotating base plate 230 to rotate at a first speed, the centrifugal force on the first slide rod 260 is insufficient to overcome the frictional force on the first slide rod 260. Therefore, when the stirring shaft 220 rotates at the first rotational speed, the first slide rod 260 will not extend out of the rotating base plate 230, thereby not affecting the second slide rod 261. This ensures that when the second slide rod 261 and the stirring blade 270 on it are inside the lower part of the mixing cylinder 200, the overall length of the second slide rod 261 and the stirring blade 270 thereon can be adapted to the longer diameter of the lower part of the mixing cylinder 200.

[0058] like Figures 9-11 As shown, when the rotating substrate 230 is located in the upper part of the mixing cylinder 200, the stirring shaft 220 drives the rotating substrate 230 to rotate at a second speed, which is greater than the first speed. This increases the centrifugal force on the first slide rod 260, and also increases the centrifugal force on the second slide rod 261. However, since the weight of the first slide rod 260 is greater than the weight of the second slide rod 261, when the rotating substrate 230 rotates at the second speed, the first slide rod 260 extends out of the rotating substrate 230. The first slide rod 260 drives the rotating gear 251 to rotate, and the rotating gear 251 drives the second slide rod 261 to retract. Because both the first slide rod 260 and the second slide rod 261 are subjected to centrifugal force, each set of first slide rods 260 and second slide rods 261 extends out of the rotating substrate 230 at this time. However, the length of the extended first slide rod 260 and second slide rod 261 is shorter than the original length of the second slide rod 261 extending out of the rotating substrate 230. The specific state is as follows: Figure 11 As shown, this allows for the adaptation to the shorter diameter of the upper part of the mixing cylinder 200.

[0059] It should be noted that the method of making the first slide bar 260 extend out of the rotating base plate 230 only when the rotating base plate 230 rotates at the second rotation speed is not limited to increasing the weight of the first slide bar 260. The weight of the first slide bar 260 and the second slide bar 261 can also be the same, and the above function can also be achieved by only increasing the weight of the stirring blade 270 connected to the first slide bar 260.

[0060] In a further embodiment, to enable each set of slide bars to reset, an elastic element (not shown in the figure) is fixedly connected to the first slide bar 260 or the second slide bar 261 of each set of slide bars. The elastic element is a spring, and the other end of the spring is fixedly connected to the rotating base plate 230. When the rotating base plate 230 is located in the lower part of the mixing cylinder 200, the elastic element is in its original length state. When the rotation speed of the rotating base plate 230 increases and it is located in the upper part of the mixing cylinder 200, the first slide bar 260 or the second slide bar 261 on the rotating base plate 230 can stretch or push the elastic element. Therefore, when the rotating base plate 230 is located in the lower part of the mixing cylinder 200 again, the rotating base plate 230 rotates at the first rotation speed. The centrifugal force on the first slide bar 260 is insufficient to overcome the elastic force of the elastic element. Therefore, the elastic element can push the first slide bar 260 or pull the second slide bar 261 to reset, that is, so that the second slide bar 261 in each set extends out of the rotating base plate 230, while the first slide bar 260 is retracted into the rotating base plate 230.

[0061] For example, if an elastic element is connected to the first slide rod 260, when the centrifugal force on the first slide rod 260 increases to overcome the elastic force and friction of the elastic element, it extends towards the outer periphery of the rotating base plate 230. The rotating gear 251 rotates, causing the second slide rod 261 to retract inward. At this time, the elastic element is stretched. When the rotating base plate 230 rotates at a first speed, the elastic element pulls the first slide rod 260 back to its original position. The first slide rod 260 drives the rotating gear 251 to rotate, and the rotating gear 251 drives the second slide rod 261 back to its original position. If the second slide rod 260... An elastic element is connected to the rod 261. When the first slide rod 260 is subjected to centrifugal force to overcome the elastic force and friction of the elastic element, it extends to the outer periphery of the rotating base plate 230. The first slide rod 260 drives the rotating gear 251 to rotate, which in turn drives the second slide rod 261 to retract. The second slide rod 261 then compresses the elastic element. When the rotating base plate 230 rotates at a first speed, the elastic element pushes the second slide rod 261 to reset. The second slide rod 261 drives the rotating gear 251 to rotate, and the rotating gear 251 drives the first slide rod 260 to reset.

[0062] It should be noted that the rotating base plate 230 of the present invention is composed of an annular plate 240, two cover plates 280 and a plurality of sector blocks 250, as specifically as follows: Figure 3As shown, the annular plate 240 has evenly distributed threaded grooves 241 on its outer periphery for connecting multiple sector blocks 250. A screw 253 is fixedly installed at the circular position of each sector block 250. The screw 253 engages with the threaded groove 241 to fix the multiple sector blocks 250 to the outer periphery of the annular plate 240. Rectangular gaps exist between adjacent sector blocks 250, and sliding rods are slidably disposed within these rectangular gaps. A rotating shaft 252 is also provided on each sector block 250, and a rotating gear 251 is rotatably mounted on the rotating shaft 252. The rotating gear 251 can mesh with the sliding rod located within the rectangular gap, specifically with the rack 262 on the sliding rod. Two cover plates 280 are located on the upper and lower surfaces of the annular plate 240 and the multiple sector blocks 250, thus enclosing them. Figure 4 As shown, each cover plate 280 has a rectangular groove 281 on its outer periphery, and a sealing gasket 282 is provided on the inner wall of the rectangular groove 281. When the two cover plates 280 are put together to wrap the annular plate 240 and multiple sector blocks 250, the rectangular grooves 281 on the two cover plates 280 form a completely closed slide groove. The slide rod located in the rectangular gap between adjacent sector blocks 250 can slide through the slide groove. The sealing gasket 282 can prevent powdery and liquid heat-conducting materials from entering the interior of the two cover plates 280. A circular hole 283 is provided at the center of the cover plate 280. One end of the stirring shaft 220 is fixedly connected to the inner ring of the annular plate 240 through the circular hole 283 at the center of the cover plate 280, so that the stirring shaft 220 can drive the annular plate 240 to rotate.

[0063] Specifically, in order to enable the stirring impeller to move along the axial direction of the mixing cylinder 200 within the mixing cylinder 200, a telescopic part is provided on the frame 100 in this embodiment, and the telescopic direction is along the axial direction of the mixing cylinder 200. The stirring shaft 220 of the stirring impeller is connected to the telescopic part. A first drive motor 140 is fixedly installed on the telescopic part of the frame 100. The rotating shaft of the first drive motor 140 is coaxial with and fixedly connected to the stirring shaft 220. When the first drive motor 140 rotates, it can drive the stirring shaft 220 to rotate around itself. The rotation speed of the first drive motor 140 is adjustable.

[0064] It should be noted that the telescopic part in this embodiment is specifically composed of a horizontal plate 120 and a vertical rod 110. The vertical rod 110 is vertically slidably connected to the frame 100, while the horizontal plate 120 is vertically connected to the vertical rod 110. The aforementioned first drive motor 140 is fixed on the lower end face of the horizontal plate 120. The frame 100 is also provided with a second drive motor 150 and a transmission chain 130. The transmission chain 130 is rotatably connected to the frame 100, and the outer periphery of the transmission chain 130 is fixedly connected to the vertical rod 110. The rotating shaft of the second drive motor 150 meshes with the transmission chain 130. When the second drive motor 150 rotates, it can drive the transmission chain 130 to rotate. The transmission chain 130 drives the vertical rod 110 to slide in the vertical direction. The vertical rod 110 drives the horizontal plate 120 to move, and the horizontal plate 120 drives the stirring shaft 220 to move along the axial direction of the mixing cylinder 200.

[0065] More specifically, in order to enable the sealing plate 210 to move in the axial direction of the mixing cylinder 200, a telescopic member 160 is fixedly installed on the frame 100. The telescopic end of the telescopic member 160 is fixed on the sealing plate 210, and the fixed end of the telescopic member 160 is fixed on the frame 100. The telescopic member 160 is vertically arranged, so when the telescopic member 160 extends or retracts, it can drive the sealing plate 210 to move along the axial direction of the mixing cylinder 200.

[0066] It should be noted that the telescopic component 160 in this embodiment can be a telescopic cylinder, a hydraulic cylinder, an electrically controlled telescopic cylinder, etc., as long as it is a structure that can realize the telescopic function, and no specific limitation is made here.

[0067] In a further embodiment, a clamping mechanism is provided on the frame 100 to clamp the mixing cylinder 200, thereby improving the stability of the mixing cylinder 200 during the stirring process.

[0068] Specifically, the clamping mechanism includes two grippers 170 symmetrically arranged on the frame 100, such as... Figure 1 and Figure 2 As shown, two grippers 170 are located on the outer periphery of the mixing cylinder 200. The two grippers 170 can approach each other to clamp the mixing cylinder 200. The distance between the two grippers 170 can be adjusted so that mixing cylinders 200 with different diameters can be clamped.

[0069] Meanwhile, multiple support rods 180 are also provided on the frame 100. These support rods 180 are used to support the bottom of the mixing cylinder 200, further improving the stability during the mixing process.

[0070] More specifically, a discharge pipe 290 is connected to the side wall near the bottom of the lower part of the mixing cylinder 200. A switch 291 is installed on the discharge pipe 290. When the mixing cylinder 200 is in the working state, the switch 291 on the discharge pipe 290 is in the closed state. When the powdered and liquid heat-conducting materials in the mixing cylinder 200 are completely mixed and the sealing plate 210 is reset to the bottom of the lower part of the mixing cylinder 200, the switch 291 can be opened, and the mixed powdered and liquid heat-conducting materials in the mixing cylinder 200 are discharged from the discharge pipe 290, thereby completing the mixing operation.

[0071] The specific working process of the mixer for preparing thermally conductive materials provided by the present invention will be described in conjunction with the above embodiments:

[0072] Turn off the switch 291 of the discharge pipe 290 on the mixing drum 200, adjust the sealing plate 210 to the bottom of the lower part of the mixing drum 200, and rotate the base plate 230 to the lower part of the mixing drum 200.

[0073] Loading:

[0074] The powdered and liquid thermal conductive materials to be mixed are added into the mixing cylinder 200, and the height of the mixed powdered and liquid thermal conductive materials in the mixing cylinder 200 is not higher than the height of the lower part of the mixing cylinder 200.

[0075] start up:

[0076] The first drive motor 140 is started. The rotation of the first drive motor 140 drives the stirring shaft 220 to rotate. The stirring shaft 220 drives the rotating base plate 230 to rotate, which in turn drives the stirring blade 270 to rotate to stir the powdered and liquid heat-conducting materials.

[0077] Low-speed premixing:

[0078] The first drive motor 140 drives the rotating base plate 230 to rotate at a first rotational speed. The first rotational speed is relatively slow. At this time, the first slide bar 260 of each set of slide bars on the rotating base plate 230 is retracted inside the rotating base plate 230, while the second slide bar 261 extends completely out of the rotating base plate 230. This makes the overall length of the second slide bar 261 plus the stirring blade 270 on the outer periphery of the rotating base plate 230 relatively long, so as to match the relatively long diameter of the lower part of the mixing cylinder 200. Combined with the low rotational speed, this allows the powdered heat-conducting material to enter below the liquid surface, preventing the powdered heat-conducting material from splashing everywhere and avoiding the entry of gas.

[0079] High-speed mixing:

[0080] The second drive motor 150 drives the transmission chain 130 to rotate, the transmission chain 130 drives the vertical rod 110 to move upward, the vertical rod 110 drives the horizontal plate 120 to move upward, the horizontal plate 120 drives the stirring shaft 220 and the rotating base plate 230 to move upward, the rotating base plate 230 moves to the upper part of the mixing cylinder 200 and stops, at the same time the first drive motor 140 drives the rotating base plate 230 to rotate at a second rotation speed (the second rotation speed is greater than the first rotation speed). As the rotation speed increases, the first slide bar 260 in each set of slide bars on the rotating base plate 230 extends out of the rotating base plate 230, while the second slide bar 261 retracts inward, thereby balancing the length of the first slide bar 260 and the second slide bar 261 extending out of the rotating base plate 230, so that the overall length of the stirring blade 270 on the outer periphery of the rotating base plate 230 is reduced, that is, it is adapted to the shorter diameter of the upper part of the mixing cylinder 200.

[0081] As the rotating substrate 230 rises to the upper part of the mixing cylinder 200, the telescopic component 160 drives the sealing plate 210 to rise synchronously, so that the sealing plate 210 moves from the bottom of the lower part of the mixing cylinder 200 to the bottom of the upper part of the mixing cylinder 200. The sealing plate 210 pushes the mixed powdered and liquid heat-conducting materials into the upper part of the mixing cylinder 200 for high-speed stirring, thereby improving the mixing effect of the powdered and liquid heat-conducting materials.

[0082] Material arrangement:

[0083] After the powdered and liquid heat-conducting materials are mixed, the telescopic component 160 pulls the sealing plate 210 downward to the bottom of the lower part of the mixing cylinder 200. At the same time, the first drive motor 140 stops driving the stirring shaft 220, and each set of slide bars on the rotating base plate 230 is reset under the action of the elastic component. The second drive motor 150 drives the stirring shaft 220 and the rotating base plate 230 to move downward and reset. The switch 291 is turned on, and the mixed powdered and liquid heat-conducting materials are discharged from the discharge pipe 290.

[0084] The present invention also provides a mixing method for preparing thermally conductive materials, which uses the above-mentioned mixer for preparing thermally conductive materials, and specifically includes the following steps:

[0085] S100: Prepare powdered and liquid thermal conductive materials;

[0086] S200: Powdered and liquid heat-conducting materials are introduced into the lower part of the mixing cylinder 200 for low-speed pre-stirring;

[0087] Before introducing the powdered and liquid heat-conducting materials, the switch 291 of the discharge pipe 290 on the mixing cylinder 200 needs to be turned off, the sealing plate 210 needs to be adjusted to be located at the bottom of the lower part of the mixing cylinder 200, and the rotating base plate 230 needs to be located in the lower part of the mixing cylinder 200. The first drive motor 140 is started to drive the rotating base plate 230 to drive the stirring blade 270 to rotate at a first rotation speed, thereby performing low-speed pre-stirring of the powdered and liquid heat-conducting materials.

[0088] S300: After low-speed pre-mixing is completed, the sealing plate 210 moves upward to push the pre-mixed liquid into the upper part of the mixing cylinder 200 for high-speed mixing.

[0089] S400: After high-speed mixing is completed, the sealing plate 210 moves downward to reset and pushes the mixed liquid back into the lower part of the mixing cylinder 200 to discharge the mixture.

[0090] Specifically, the material is discharged through the discharge pipe 290 on the mixing drum 200.

[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A mixer for preparing thermally conductive materials, characterized in that, include: A frame, on which a mixing cylinder is vertically arranged, the mixing cylinder having upper and lower parts, the diameter of the upper part of the mixing cylinder being smaller than the diameter of the lower part of the mixing cylinder, and a sealing plate being axially slidably arranged at the bottom of the mixing cylinder, the sealing plate being in contact with the mixture inside the mixing cylinder; The impeller is capable of moving axially within the mixing cylinder, and the impeller blades are capable of radial extension and retraction. The impeller and the sealing plate move axially synchronously. When the sealing plate is located at the bottom end of the lower part of the mixing cylinder, the stirring impeller is located at the lower part of the mixing cylinder at a first rotational speed, and the length of the stirring blades of the stirring impeller is adapted to the diameter of the lower part of the mixing cylinder; When the sealing plate is located at the bottom end of the upper part of the mixing cylinder, the stirring impeller is located at the upper part of the mixing cylinder at a second rotational speed. The length of the stirring blades of the stirring impeller is adapted to the diameter of the upper part of the mixing cylinder, and the first rotational speed is less than the second rotational speed. The stirring impeller includes a stirring shaft and a rotating base plate. One end of the stirring shaft is connected to the frame, and the other end of the stirring shaft is coaxial and fixedly connected to the rotating base plate. A plurality of sliding rods are evenly slidably arranged on the outer periphery of the rotating base plate. The plurality of sliding rods are radially distributed along the rotating base plate. A stirring blade is connected to the end of the plurality of sliding rods away from the rotating base plate. A rotating gear is rotatably arranged between adjacent sliding rods. The rotating gear meshes with the outer periphery of two sliding rods. Two sliding rods meshing with the same rotating gear form a group. When the rotating substrate is located in the lower part of the mixing cylinder, one of the slide rods in each group is retracted into the rotating substrate, while the other extends out of the rotating substrate, and the weight of the slide rod retracted into the rotating substrate is greater than the weight of the slide rod extending out of the rotating substrate. One of the slide bars in each group is connected to an elastic element, and the other end of the elastic element is fixedly connected to the rotating base plate. The frame has a telescopic part that can extend and retract in the vertical direction. When the telescopic part extends and retracts, it drives the stirring shaft to move axially in the mixing cylinder. A first drive motor is fixedly installed on the telescopic part, and the first drive motor drives the stirring shaft to rotate around its own axis.

2. The mixer for preparing thermally conductive materials according to claim 1, characterized in that, The frame is equipped with a second drive motor and a transmission chain. The transmission chain is rotatably connected to the frame and its outer periphery is connected to the telescopic part. The rotation of the transmission chain can drive the telescopic part to extend and retract. The shaft of the second drive motor meshes with the transmission chain.

3. The mixer for preparing thermally conductive materials according to claim 1, characterized in that, The frame is equipped with a telescopic component. The fixed end of the telescopic component is connected to the frame, and the telescopic end of the telescopic component is connected to the sealing plate. The telescopic component can drive the sealing plate to move.

4. The mixer for preparing thermally conductive materials according to claim 1, characterized in that, The frame is equipped with a clamping mechanism, which fixes the mixing cylinder on the frame.

5. The mixer for preparing thermally conductive materials according to claim 4, characterized in that, The clamping mechanism includes two symmetrically arranged jaws located on the outer periphery of the mixing cylinder, which are close to each other to clamp the mixing cylinder.

6. The mixer for preparing thermally conductive materials according to claim 1, characterized in that, A discharge pipe is connected to the side wall near the bottom of the lower part of the mixing cylinder, and a switch is installed on the discharge pipe.

7. A mixing method for preparing a thermally conductive material, using the mixer for preparing a thermally conductive material according to any one of claims 1-6, characterized in that, At least the following steps are included: S100: Prepare powdered and liquid thermal conductive materials; S200: Powdered and liquid heat-conducting materials are introduced into the lower part of the mixing drum for low-speed pre-stirring; S300: After low-speed pre-mixing is completed, the sealing plate moves upward to push the pre-mixed liquid into the upper part of the mixing drum for high-speed mixing. S400: After high-speed mixing is completed, the sealing plate moves downward to reset and pushes the mixed liquid back into the lower part of the mixing drum to discharge the mixed liquid.

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