Preparation device and method of modified polypropylene energy storage and heat dissipation insulation material

Abstract

The application provides a preparation device (100) of modified polypropylene energy storage heat dissipation insulation material, comprising: a reaction container (11); a fixed cover (12) and a movable cover (13) arranged on the upper edge of the reaction container (11) respectively, the movable cover (13) is configured to be able to pivot relative to the fixed cover (12); an actuating motor (16) and a transmission part (17) arranged on the fixed cover (12); and an agitating part for agitating the material in the reaction container (11), the agitating part comprises a composite rotating shaft (18), the composite rotating shaft (18) is in transmission connection with the transmission part (17), the bottom surface of the reaction container (11) is at a first angle relative to the horizontal plane, and the composite rotating shaft (18) of the agitating part is at a second angle relative to the vertical direction, and the first angle and the second angle are both acute angles. The application also provides a preparation method of modified polypropylene energy storage heat dissipation insulation material, and the production efficiency and the uniformity of product performance can be improved by the preparation device and the preparation method.

Description

Technical Field

[0001] This invention relates to the field of mixer technology, specifically to a mixer having a rotating stirring device in a fixed container, and more particularly to a preparation apparatus and method for a modified polypropylene energy storage, heat dissipation, and insulation material. Background Technology

[0002] In industrial practice, numerous applications require materials with excellent thermal properties. For example, in battery packs, materials with good thermal control performance are desired. This requires both good thermal conductivity to rapidly dissipate heat to the outside and the ability to absorb a large amount of heat without significant temperature change. Existing phase change materials (PCCs) can absorb a large amount of heat without rapidly heating up during phase transitions, making them a suitable thermal control material for battery packs.

[0003] Stirring composite materials in the molten state is the primary method for preparing such thermal control materials. Various additives, such as flame retardants, accelerators, and reinforcing agents, are added to the composite material at different stages. To maintain material homogeneity, stirring and reaction must be as thorough and uniform as possible, while simultaneously aiming to shorten stirring and reaction times to improve production efficiency. Existing mixing machines cannot overcome the problem of material stratification, thus either resulting in uneven mixing or requiring longer mixing times. Summary of the Invention

[0004] The purpose of this invention is to at least partially overcome the deficiencies of the prior art and provide a preparation apparatus and method for a modified polypropylene energy storage and heat dissipation insulating material.

[0005] The present invention also aims to provide a preparation apparatus and method for modified polypropylene energy storage and heat dissipation insulation material, thereby improving production efficiency.

[0006] The present invention also aims to provide a preparation apparatus and method for modified polypropylene energy storage and heat dissipation insulation material, thereby improving the uniformity of product performance.

[0007] To achieve the above-mentioned objectives or one of them, the technical solution of the present invention is as follows:

[0008] An apparatus for preparing a modified polypropylene energy storage and heat dissipation insulating material, the apparatus comprising:

[0009] Reaction vessel;

[0010] A fixed cover and a movable cover are respectively disposed on the upper edge of the reaction vessel, and the movable cover is configured to pivot relative to the fixed cover;

[0011] The actuation motor and transmission unit are mounted on the fixed cover; and

[0012] A stirring unit, used to agitate materials within the reaction vessel, includes a composite rotating shaft that is connected to a transmission unit.

[0013] The bottom surface of the reaction vessel forms a first angle with respect to the horizontal plane, and the composite rotation axis of the stirring part forms a second angle with the vertical direction. Both the first angle and the second angle are acute angles.

[0014] According to a preferred embodiment of the present invention, the agitating part includes:

[0015] The first impeller is fixedly mounted on the end of the composite shaft away from the transmission part;

[0016] The movable second and third impellers are located above the first impeller and are movably mounted on the composite shaft.

[0017] According to a preferred embodiment of the present invention, the composite rotating shaft is provided with a bidirectional helix, the bidirectional helix including a first helical segment helical along a first direction and a second helical segment helical along a second direction;

[0018] Both the second and third impellers have sleeves, and the sleeves of the second and third impellers are provided with internal helices. The internal helix of the second impeller mates with the first helical segment, and the internal helix of the third impeller mates with the second helical segment.

[0019] According to a preferred embodiment of the present invention, the composite shaft is provided with a plurality of limiting parts for limiting the second impeller and the third impeller from moving excessively in the axial direction of the composite shaft.

[0020] According to a preferred embodiment of the present invention, the reaction vessel is heated by an electric heating element disposed on the bottom side of the reaction vessel.

[0021] According to a preferred embodiment of the present invention, an air passage is provided inside the composite shaft, and a groove is formed on the side wall of the composite shaft, the groove communicating with the air passage;

[0022] A floating rib is provided inside the groove, and the rib is configured to move between a first position protruding from the groove and a second position retracted into the groove.

[0023] The inner side of the sleeve of the second and third impellers is provided with a groove that mates with the protrusion.

[0024] According to a preferred embodiment of the present invention, a plurality of tension springs are provided in the air passage, one end of each tension spring is fixed to the side wall of the air passage, and the other end is fixed to the protrusion. When the tension spring is not under force, the protrusion is retracted into the groove.

[0025] According to a preferred embodiment of the present invention, at least one cleaning channel extending axially is provided inside the composite rotating shaft, and a plurality of nozzles are provided on the side wall of the composite rotating shaft, the nozzles communicating with the cleaning channel.

[0026] The cleaning channel is independent of the air passage, and the nozzle is offset from the groove in the circumferential direction of the composite shaft.

[0027] According to a preferred embodiment of the present invention, each of the first impeller, the second impeller and the third impeller includes a plurality of blades, each blade including a substrate, a first folded edge and a second folded edge, the first folded edge being located on one side of the substrate and bent toward a first surface of the substrate, and the second folded edge being located on the other side of the substrate and bent toward a second surface of the substrate opposite to the first surface.

[0028] According to a preferred embodiment of the present invention, the substrate is provided with a plurality of conical protrusions protruding from the substrate, each conical protrusion having a through conical hole.

[0029] According to a preferred embodiment of the invention, the axis of each conical protrusion forms an acute angle with the substrate;

[0030] The extended axes of adjacent conical protrusions intersect each other and form multiple rows of conical protrusions along the axial direction of the composite rotation axis, with the conical protrusions in adjacent rows being staggered from each other.

[0031] According to a preferred embodiment of the present invention, the fixed cover is provided with a first inlet and a second inlet, and an outlet is provided on the lower side of the bottom of the reaction vessel.

[0032] According to another aspect of the present invention, a method for preparing a modified polypropylene energy storage and heat dissipation insulating material is provided, wherein the preparation method uses the apparatus for preparing the modified polypropylene energy storage and heat dissipation insulating material as described in any of the foregoing embodiments.

[0033] In existing apparatuses for preparing modified polypropylene energy storage and heat dissipation insulation materials, material stratification occurs during mixing. Within the reaction vessel, materials at the same height layer mix slowly with those at other height layers, requiring a long time to achieve uniform mixing and consequently, a prolonged reaction time. This invention provides an apparatus for preparing modified polypropylene energy storage and heat dissipation insulation materials. Its reaction vessel is designed with an inclined bottom, and the agitator is also inclined. This creates an upward lifting force when the agitator rotates, vertically lifting materials at different height layers and accelerating mixing. This is why the apparatus improves production efficiency and product uniformity. Furthermore, the inclined bottom of the reaction vessel facilitates material discharge.

[0034] Furthermore, the apparatus for preparing the modified polypropylene energy storage and heat dissipation insulation material of the present invention has two impellers that can move along a rotating shaft. These two impellers are connected to the rotating shaft through a helical section. They have an internal helix and a bidirectional helix is ​​provided on the rotating shaft. Without external force constraint, the two impellers can change position on the rotating shaft by rotation, that is, they can be raised or lowered on the rotating shaft. In this way, when the rotating shaft rotates, the second and third impellers have a tendency to change position along the rotating shaft. And because it is a bidirectional helix, the second and third impellers always tend to move closer to each other or further away from each other. The actuating motor alternately rotates forward and reverse. The change in height of the impellers and this irregular movement accelerate the mixing of materials. Whether the height of the two impellers changes is controlled. Through an air passage and a connecting groove within the composite shaft, the protruding strip within the groove can be pneumatically controlled by high pressure. When the air source is closed, the protruding strip retracts into the groove under the action of a tension spring. At this time, the two impellers can rotate freely on the shaft, thus changing position with the forward and reverse rotation of the actuating motor. When the actuating air source is opened and air is supplied to the groove, the protruding strip overcomes the force of the tension spring and tends to protrude outward from the groove. When the impeller rotates until the groove is directly opposite the protruding strip, the protruding strip can extend into the groove, thus engaging with it. At this time, the impeller can no longer change position on the shaft, but rotates forward or reverse with the shaft. The forward and reverse rotation of the shaft in this invention is alternating, and the opening and closing of the air source is optional; it can be closed or alternately opened and closed. In this way, the positions of the second and third impellers can be changed, breaking up material stratification. It should be noted that the positions of the second and third impellers do not need to be precisely controlled; their positions can be arbitrary, depending on the motor's rotation direction and whether the air supply is on. When the air supply is first turned on, the convex strip may not yet be engaged with the grooves of the two impellers. However, as the impellers rotate to a certain position under the drive of the shaft and the resistance of the material, their grooves may engage with the convex strip. It is also possible that at a certain moment, the groove of the second impeller engages with the convex strip, while the groove of the third impeller is not yet engaged. This does not affect the operation of the stirring unit. When air is introduced into the gas channel, a small amount of gas enters the reaction vessel through the gap between the groove and the convex strip, which is beneficial and further accelerates the mixing process.

[0035] The preparation apparatus of the present invention has a cleaning channel extending axially within its composite rotating shaft. Multiple nozzles are located on the sidewall of the composite rotating shaft. Water and cleaning fluid can be sprayed into the reaction vessel through the cleaning channel and nozzles to clean the impeller of the stirring section and the reaction vessel. Furthermore, the impeller of the preparation apparatus for the modified polypropylene energy storage and heat dissipation insulation material of the present invention is a double-flange impeller with two flanges facing different directions. These two flanges can separate the material when the rotating shaft rotates in different directions, improving mixing efficiency. The substrate has conical protrusions extending from it. Each conical protrusion has a through conical hole connecting both sides of the substrate. Advantageously, the axis of each conical protrusion forms an acute angle with the substrate, and the extensions of the axes of adjacent conical protrusions intersect each other. Multiple rows of conical protrusions are formed along the axial direction of the composite rotating shaft, with the conical protrusions in adjacent rows staggered. With this design, materials are exchanged over a large area through the impeller and over a small area through conical protrusions and conical holes (which are irregular), which greatly improves mixing efficiency and shortens the uniform reaction time. Attached Figure Description

[0036] Figure 1 This is a perspective view of an apparatus for preparing modified polypropylene energy storage and heat dissipation insulation material according to an embodiment of the present invention;

[0037] Figure 2 This is a front view of an apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention;

[0038] Figure 3 A cross-sectional view of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulation material according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the stirring section and rotating shaft of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention;

[0040] Figure 5 for Figure 4 Enlarged view of the circled area;

[0041] Figure 6 This is a partially enlarged view of the second or third impeller of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention;

[0042] Figure 7 This is a partially enlarged view of the composite shaft of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention;

[0043] Figure 8A cross-sectional view (a cross-section along the axis of the composite shaft) of the apparatus for preparing modified polypropylene energy storage heat dissipation insulation material according to an embodiment of the present invention.

[0044] Figure 9 for Figure 8 Enlarged view of the circled area;

[0045] Figure 10 This is a cross-sectional view (a section along the axis perpendicular to the composite shaft) of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention.

[0046] Figure 11 A cross-sectional view of the composite shaft of the apparatus for preparing modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention (a cross-section along the axis of the composite shaft, which is consistent with...). Figure 8 (The cross-section is perpendicular);

[0047] Figure 12 for Figure 11 Enlarged view of the circled area;

[0048] Figure 13 A partial schematic diagram of a second or third impeller according to an embodiment of the present invention;

[0049] Figure 14 for Figure 13 An enlarged view of the circled area. Detailed Implementation

[0050] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements. Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the drawings.

[0051] The preparation apparatus of the present invention is a mixer, which serves as a reaction vessel for the preparation of modified polypropylene energy storage and heat dissipation insulation materials. Using the mixer of the present invention in the preparation process of modified polypropylene energy storage and heat dissipation insulation materials can improve the reaction rate and mixing rate of the product, and the uniformity of the obtained product is better. The mixer of the present invention can also be used in the production of general heat dissipation insulation materials.

[0052] The modified polypropylene energy storage and heat dissipation insulation material is prepared using polypropylene, xylene, maleic anhydride, and benzoyl peroxide as raw materials. First, molten polypropylene is added to a mixer, followed by xylene and maleic anhydride, which are then mixed and stirred until homogeneous. Benzoyl peroxide is then added, maintaining the reaction temperature while stirring continuously to ensure a uniform reaction. Stirring is maintained for at least one hour to obtain the modified polypropylene. Modified boron nitride, tetrabutylammonium bromide, dimethyl sulfoxide, and a flame retardant are added to the modified polypropylene. Mixing and reaction are also completed in a mixer, using heating and thorough stirring to finally obtain the modified polypropylene energy storage and heat dissipation insulation material. The preparation process of the modified polypropylene energy storage and heat dissipation insulation material is existing technology and is not the focus of this invention; therefore, it will not be described in detail in this specification.

[0053] According to the overall inventive concept of the present invention, a preparation apparatus for modified polypropylene energy storage and heat dissipation insulation material is provided. The preparation apparatus includes: a reaction container; a fixed cover and a movable cover respectively disposed on the upper edge of the reaction container, the movable cover being configured to pivot relative to the fixed cover; an actuating motor and a transmission unit disposed on the fixed cover; and a stirring unit for stirring the material in the reaction container. The stirring unit includes a composite rotating shaft, the composite rotating shaft being drivenly connected to the transmission unit. The bottom surface of the reaction container forms a first angle with respect to the horizontal plane, and the composite rotating shaft of the stirring unit forms a second angle with the vertical direction. Both the first angle and the second angle are acute angles.

[0054] Figure 1 A perspective view of an apparatus for preparing a modified polypropylene energy storage and heat dissipation insulating material according to an embodiment of the present invention is shown. The apparatus 100 mainly consists of a reaction vessel 11, which is heated by an electric heating element disposed on the bottom side of the reaction vessel 11. The electric heating element may also be disposed on the inner wall of the reaction vessel 11 or simultaneously on the bottom side and the inner wall. The reaction vessel 11 is mounted on multiple support legs and is sealed by a fixed cover 12 and a movable cover 13. The fixed cover 12 and the movable cover 13 are disposed on the upper edge of the reaction vessel 11. The movable cover 13 is configured to pivot relative to the fixed cover 12. A transverse slat is provided on the fixed cover 12, and two hinges are provided on the transverse slats. The movable cover 13 is connected to the hinges. The fixed cover 12 is provided with a first inlet 14 and a second inlet 15 for adding polypropylene and additives into the reaction vessel 11, and an outlet 23 is provided on the lower bottom side of the reaction vessel 11. An actuation motor 16 and a transmission part 17 are fixedly disposed on the fixed cover 12. The actuation motor 16 can rotate forward and reverse. In this invention, the actuation motor 16 rotates forward and reverse alternately. The actuation motor 16 transmits the rotation to the composite rotating shaft 18 connected to the transmission part 17 through the transmission part 17.

[0055] An agitator is provided inside the reaction vessel 11 for agitating the materials within the vessel. The agitator includes a composite rotating shaft 18, which is connected to a transmission unit 17. It should be noted that the bottom surface of the reaction vessel 11 forms a first angle with respect to the horizontal plane, and the composite rotating shaft 18 of the agitator forms a second angle with the vertical direction. Both the first and second angles are acute angles. In one specific embodiment, the first angle is 25 degrees and the second angle is 15 degrees.

[0056] like Figure 3 As shown, the agitation unit includes: a fixed first impeller 19, fixedly disposed at the end of the composite shaft 18 away from the transmission part 17; and movable second impellers 20 and third impellers 21, sequentially located above the first impeller 19 and movably disposed on the composite shaft 18. A limiting part 22 is provided on the upper side of the third impeller 21, between the third impeller 21 and the second impeller 20, and between the second impeller 20 and the first impeller 19, respectively. The limiting parts 22 are used to restrict excessive axial movement of the second impeller 20 and the third impeller 21 on the composite shaft 18.

[0057] refer to Figure 4-6 The composite rotating shaft 18 is provided with a bidirectional spiral 24, which includes a first spiral segment spiraling in a first direction and a second spiral segment spiraling in a second direction; the second impeller 20 and the third impeller 21 are both provided with a sleeve 26, and the sleeve 26 of the second impeller 20 and the third impeller 21 are provided with an inner spiral 27. The inner spiral 27 of the second impeller 20 is engaged with the first spiral segment, and the inner spiral 27 of the third impeller 21 is engaged with the second spiral segment.

[0058] Specifically, the composite shaft 18 is provided with an air passage 29, which is located at the center of the composite shaft 18. A groove is formed on the side wall of the composite shaft 18, and the groove communicates with the air passage 29. A floating protrusion 25 is provided within the groove, configured to move between a first position protruding from the groove and a second position retracted within the groove. The inner sides of the sleeves 26 of the second impeller 20 and the third impeller 21 are provided with grooves 28 that mate with the protrusion 25. Multiple tension springs 31 are provided within the air passage 29, with one end of each spring fixed to the side wall of the air passage 29 and the other end fixed to the protrusion 25. When the tension spring 31 is not under stress, the protrusion 25 is retracted within the groove. The protruding strip 25 is slender, and its cross-section perpendicular to the axis is approximately T-shaped. In the natural state of the tension spring 31, the protruding strip 25 does not extend out of the groove. However, when high-pressure gas is filled into the air passage 29, the protruding strip 25 can extend outward from the groove. A small amount of gas leaks out at the gap between the protruding strip 25 and the groove, which is used to agitate the mixture and accelerate the mixing of materials.

[0059] Alternatively, the number of protrusions 25 can be set to three, and correspondingly, the number of grooves 28 inside the sleeve 26 of each of the second impeller 20 and the third impeller 21 is three.

[0060] In the illustrated embodiment, the composite shaft 18 is provided with two axially extending cleaning channels 30, and a plurality of nozzles 32 are provided on the side wall of the composite shaft 18, the nozzles 32 being connected to the cleaning channels 30; the cleaning channels 30 are independent of the air passage 29 and are located on the side of the air passage 29, the cleaning channels 30 being connected to water and cleaning fluid, and the nozzles 32 being offset from the groove in the circumferential direction of the composite shaft 18.

[0061] Advantageously, each of the first impeller 19, the second impeller 20, and the third impeller 21 includes multiple blades, each blade including a substrate, a first folded edge 33, and a second folded edge 34. The first folded edge 33 is located on one side of the substrate and bends towards a first surface of the substrate, while the second folded edge 34 is located on the other side of the substrate and bends towards a second surface of the substrate opposite to the first surface. The substrate is provided with multiple conical protrusions 35 projecting from the substrate, each conical protrusion 35 having a through conical hole 36. The axis of each conical protrusion 35 forms an acute angle with the substrate; the extensions of the axes of adjacent conical protrusions 35 intersect each other, forming multiple rows of conical protrusions 35 along the axial direction of the composite rotating shaft 18, with the conical protrusions 35 in adjacent rows staggered from each other. For example, three rows of conical protrusions 35 are provided on the substrate, with the same number of protrusions in each row, namely the first row, the second row, and the third row. The second row of conical protrusions intersects with the first row, and the second row intersects with the third row. The axes of the conical protrusions 35 in the same row form the same angle with the substrate, while the axes of adjacent rows of conical protrusions 35 form different angles with the substrate, and the extensions of the axes of adjacent rows of conical protrusions 35 intersect each other.

[0062] exist Figure 13 In one embodiment, only the first surface of the substrate has tapered protrusions 35. As an example, tapered protrusions 35 are present on both surfaces of the substrate. Each surface has three rows of tapered protrusions 35. The first row of tapered protrusions on the first surface and the first row of tapered protrusions on the second surface are located in the same axial direction (axial direction of the composite shaft) but are staggered. The second row of tapered protrusions on the first surface and the second row of tapered protrusions on the second surface are located in the same axial direction (axial direction of the composite shaft) but are staggered. The third row of tapered protrusions on the first surface and the third row of tapered protrusions on the second surface are located in the same axial direction (axial direction of the composite shaft) but are staggered.

[0063] According to another aspect of the present invention, a method for preparing a modified polypropylene energy storage and heat dissipation insulating material is provided, wherein the preparation method uses the apparatus 100 for preparing the modified polypropylene energy storage and heat dissipation insulating material as described in any of the foregoing embodiments.

[0064] In existing apparatuses for preparing modified polypropylene energy storage and heat dissipation insulation materials, material stratification occurs during mixing. Within the reaction vessel, materials at the same height layer mix slowly with those at other height layers, requiring a long time to achieve uniform mixing and consequently, a prolonged reaction time. This invention provides an apparatus for preparing modified polypropylene energy storage and heat dissipation insulation materials. Its reaction vessel is designed with an inclined bottom, and the agitator is also inclined. This creates an upward lifting force when the agitator rotates, vertically lifting materials at different height layers and accelerating mixing. This is why the apparatus improves production efficiency and product uniformity. Furthermore, the inclined bottom of the reaction vessel facilitates material discharge.

[0065] Furthermore, the apparatus for preparing the modified polypropylene energy storage and heat dissipation insulation material of the present invention has two impellers that can move along a rotating shaft. These two impellers are connected to the rotating shaft through a helical section. They have an internal helix and a bidirectional helix is ​​provided on the rotating shaft. Without external force constraint, the two impellers can change position on the rotating shaft by rotation, that is, they can be raised or lowered on the rotating shaft. In this way, when the rotating shaft rotates, the second and third impellers have a tendency to change position along the rotating shaft. And because it is a bidirectional helix, the second and third impellers always tend to move closer to each other or further away from each other. The actuating motor alternately rotates forward and reverse. The change in height of the impellers and this irregular movement accelerate the mixing of materials. Whether the height of the two impellers changes is controlled. Through an air passage and a connecting groove within the composite shaft, the protruding strip within the groove can be pneumatically controlled by high pressure. When the air source is closed, the protruding strip retracts into the groove under the action of a tension spring. At this time, the two impellers can rotate freely on the shaft, thus changing position with the forward and reverse rotation of the actuating motor. When the actuating air source is opened and air is supplied to the groove, the protruding strip overcomes the force of the tension spring and tends to protrude outward from the groove. When the impeller rotates until the groove is directly opposite the protruding strip, the protruding strip can extend into the groove, thus engaging with it. At this time, the impeller can no longer change position on the shaft, but rotates forward or reverse with the shaft. The forward and reverse rotation of the shaft in this invention is alternating, and the opening and closing of the air source is optional; it can be closed or alternately opened and closed. In this way, the positions of the second and third impellers can be changed, breaking up material stratification. It should be noted that the positions of the second and third impellers do not need to be precisely controlled; their positions can be arbitrary, depending on the motor's rotation direction and whether the air supply is on. When the air supply is first turned on, the convex strip may not yet be engaged with the grooves of the two impellers. However, as the impellers rotate to a certain position under the drive of the shaft and the resistance of the material, their grooves may engage with the convex strip. It is also possible that at a certain moment, the groove of the second impeller engages with the convex strip, while the groove of the third impeller is not yet engaged. This does not affect the operation of the stirring unit. When air is introduced into the gas channel, a small amount of gas enters the reaction vessel through the gap between the groove and the convex strip, which is beneficial and further accelerates the mixing process.

[0066] The preparation apparatus of the present invention has a cleaning channel extending axially within its composite rotating shaft. Multiple nozzles are located on the sidewall of the composite rotating shaft. Water and cleaning fluid can be sprayed into the reaction vessel through the cleaning channel and nozzles to clean the impeller of the stirring section and the reaction vessel. Furthermore, the impeller of the preparation apparatus for the modified polypropylene energy storage and heat dissipation insulation material of the present invention is a double-flange impeller with two flanges facing different directions. These two flanges can separate the material when the rotating shaft rotates in different directions, improving mixing efficiency. The substrate has conical protrusions extending from it. Each conical protrusion has a through conical hole connecting both sides of the substrate. Advantageously, the axis of each conical protrusion forms an acute angle with the substrate, and the extensions of the axes of adjacent conical protrusions intersect each other. Multiple rows of conical protrusions are formed along the axial direction of the composite rotating shaft, with the conical protrusions in adjacent rows staggered. With this design, materials are exchanged over a large area through the impeller and over a small area through conical protrusions and conical holes (which are irregular), which greatly improves mixing efficiency and shortens the uniform reaction time.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

[0068] List of reference numerals in the attached diagram:

[0069] 100 Preparation apparatus

[0070] 11. Reaction Vessel

[0071] 12 Fixed cover

[0072] 13. Movable cover

[0073] 14 First Entrance

[0074] 15 Second Entrance

[0075] 16 Actuating Motors

[0076] 17. Transmission Unit

[0077] 18 Composite Shaft

[0078] 19 First impeller

[0079] 20 Second impeller

[0080] 21 Third impeller

[0081] 22 Limiting section

[0082] 23 Exports

[0083] 24. Double-sided spiral

[0084] 25 ridges

[0085] 26 sleeve

[0086] 27 internal spiral

[0087] 28 Grooves

[0088] 29. Airway

[0089] 30 Cleaning Channel

[0090] 31. Tension Spring

[0091] 32 nozzles

[0092] 33 First fold

[0093] 34 Second fold

[0094] 35 Conical protrusions

[0095] 36. Tapered hole.

Claims

1. A preparation apparatus (100) for a modified polypropylene energy storage and heat dissipation insulating material, characterized in that, The preparation apparatus (100) includes: Reaction vessel (11); A fixed cover (12) and a movable cover (13) are respectively disposed on the upper edge of the reaction vessel (11), and the movable cover (13) is configured to pivot relative to the fixed cover (12); The actuating motor (16) and the transmission unit (17) are mounted on the fixed cover (12); and The stirring section is used to stir the materials inside the reaction vessel (11). The stirring section includes a composite rotating shaft (18), which is connected to the transmission section (17). The bottom surface of the reaction vessel (11) forms a first angle with respect to the horizontal plane, and the composite rotating shaft (18) of the stirring part forms a second angle with the vertical direction. Both the first angle and the second angle are acute angles. The stirring part includes: The fixed first impeller (19) is fixedly mounted on the end of the composite shaft (18) away from the transmission part (17); The movable second impeller (20) and third impeller (21) are located above the first impeller (19) and are movably mounted on the compound rotating shaft (18); The composite rotating shaft (18) is provided with a bidirectional spiral (24), the bidirectional spiral (24) including a first spiral segment spiraling in a first direction and a second spiral segment spiraling in a second direction; The second impeller (20) and the third impeller (21) both have sleeves (26). The sleeves (26) of the second impeller (20) and the third impeller (21) are provided with inner spirals (27). The inner spirals (27) of the second impeller (20) are engaged with the first spiral segment, and the inner spirals (27) of the third impeller (21) are engaged with the second spiral segment. The composite shaft (18) is provided with an air passage (29), and a wire groove is opened on the side wall of the composite shaft (18), which is connected to the air passage (29). A floating rib (25) is provided inside the groove, and the rib (25) is configured to move between a first position protruding from the groove and a second position retracted into the groove. The inner side of the sleeve (26) of the second impeller (20) and the third impeller (21) is provided with a groove (28) that cooperates with the protrusion (25); Multiple tension springs (31) are provided inside the air passage (29). One end of each tension spring (31) is fixed to the side wall of the air passage (29), and the other end is fixed to the protrusion (25). When the tension spring (31) is not under force, the protrusion (25) is retracted into the groove. The composite shaft (18) is provided with at least one cleaning channel (30) extending along the axial direction, and a plurality of nozzles (32) are provided on the side wall of the composite shaft (18), the nozzles (32) being connected to the cleaning channel (30). The cleaning channel (30) is independent of the air passage (29), and the nozzle (32) is offset from the groove in the circumferential direction of the composite shaft (18).

2. The apparatus (100) for preparing modified polypropylene energy storage and heat dissipation insulation material according to claim 1, characterized in that: The composite shaft (18) is provided with a plurality of limiting parts (22) to limit the second impeller (20) and the third impeller (21) from moving excessively in the axial direction of the composite shaft (18).

3. The apparatus (100) for preparing modified polypropylene energy storage and heat dissipation insulating material according to claim 1, characterized in that: Each of the first impeller (19), the second impeller (20) and the third impeller (21) includes multiple blades, each blade including a substrate, a first folded edge (33) and a second folded edge (34), the first folded edge (33) being located on one side of the substrate and bent toward the first surface of the substrate, and the second folded edge (34) being located on the other side of the substrate and bent toward the second surface of the substrate opposite to the first surface.

4. The apparatus (100) for preparing modified polypropylene energy storage and heat dissipation insulation material according to claim 3, characterized in that: The substrate is provided with a plurality of conical protrusions (35) protruding from the substrate, each conical protrusion (35) having a through conical hole (36).

5. A method for preparing a modified polypropylene energy storage and heat dissipation insulating material, characterized in that: The preparation method uses the apparatus (100) for preparing modified polypropylene energy storage and heat dissipation insulation material according to any one of claims 1-4.

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