A slot cutter

Abstract

This utility model discloses a slit shear, which includes a housing (1). An upper slit assembly (4) and a lower slit assembly (5) are embedded within the housing (1) and arranged vertically opposite to each other. A zigzag slit channel (7) is formed between the bottom of the upper slit assembly (4) and the top of the lower slit assembly (5). The height of the slit channel (7) is 50 nm to 1000 nm. An inlet assembly (2) and an outlet assembly (3) are sealed at both ends of the housing (1). This slit shear can withstand a pressure of 50 MPa. The slit shear of this utility model has a reasonable structure, is easy to manufacture, and has low equipment cost. It fully considers the feasibility of manufacturing and processing, and its modular design and assembly reduce manufacturing difficulty. It is suitable for homogenizing nanomaterials and peeling off multi-walled carbon nanotube materials; it can also be used for homogenizing nano-slurries, achieving more uniform quality and higher efficiency compared to stirring homogenization.

Description

Technical Field

[0001] This invention relates to the field of carbon nanotube and graphene preparation technology, specifically a slit shear for preparing single-walled carbon nanotubes and graphene. Background Technology

[0002] Single-walled carbon nanotubes (SWCNTs) can be viewed as having a geometry composed of rolled-up monolayers of graphene, exhibiting excellent electronic, mechanical, and other properties. Furthermore, variations in their atomic scale can alter their properties. Carbon nanotubes possess a large aspect ratio, and through manipulation, a large specific surface area and a high degree of graphitization can be achieved, leading to their wide applications in supercapacitors, catalyst supports, hydrogen storage, carbide-ion batteries, and functional coatings.

[0003] The main methods for preparing single-walled carbon nanotubes include arc ablation, laser evaporation, and chemical vapor deposition. Arc ablation produces single-walled carbon nanotubes with high graphitization and few structural defects; however, it often results in the carbon nanotubes being mixed with byproducts such as amorphous carbon and carbon nanoparticles, making separation and purification difficult. Furthermore, this method requires high-purity graphite as the carbon source, which has a boiling point as high as 4830℃, leading to high energy consumption during evaporation. Other reports suggest mixing graphitizable carbon powder with iron powder, pressing it into carbon rods, and then sintering them under an inert atmosphere to fully graphitize the carbon powder, thus obtaining iron-containing catalyst-containing carbon electrode rods as reaction raw materials. However, this method is complex and energy consumption is high during sintering. Laser evaporation yields high-quality carbon nanotubes, but due to the high energy requirements of the laser and the expensive equipment, it is not suitable for large-scale preparation of carbon nanotubes. Chemical vapor deposition is currently the most common method for preparing carbon nanotubes. Its growth mechanism is as follows: at high temperature, the gaseous carbon source decomposes on the surface of the transition metal catalyst, and the carbon formed dissolves in the catalyst particles. As the carbon continues to dissolve, when supersaturation is reached, it precipitates from the metal to form carbon nanotubes. Since these transition metal catalysts are usually prepared by impregnation, they inevitably agglomerate and grow under high temperature conditions, resulting in carbon nanotubes with varying diameters and large diameters.

[0004] The above-mentioned methods for preparing single-walled carbon nanotubes all have some shortcomings. They may damage the carbon nanotubes, have complex processing methods that are difficult to apply in industry, or have low yields that are difficult to scale up for industrial production. Therefore, there is an urgent need to develop products and processes that can efficiently produce single-walled carbon nanotubes.

[0005] The existing production technologies for graphene are mainly:

[0006] Mechanical exfoliation: This method utilizes friction and relative motion between an object and graphene to obtain thin layers of graphene. It is simple to operate, and the resulting graphene typically retains its complete crystalline structure. In 2004, two British scientists used transparent tape to peel away layers of natural graphite to obtain graphene, also classified as mechanical exfoliation. This method was once considered inefficient and unsuitable for industrial mass production. While this method can produce micrometer-sized graphene, its controllability is low, making large-scale synthesis difficult.

[0007] Oxidation-reduction method: This method uses chemical reagents such as sulfuric acid and nitric acid, and oxidants such as potassium permanganate and hydrogen peroxide, to oxidize natural graphite, increasing the spacing between graphite layers and inserting oxides between them to produce graphite oxide. The reactants are then washed with water, and the washed solid is dried at low temperature to obtain graphite oxide powder. The graphite oxide powder is then exfoliated using methods such as physical exfoliation and high-temperature expansion to obtain graphene oxide. Finally, the graphene oxide is chemically reduced to obtain graphene (RGO). This method is simple to operate and has a high yield, but the product quality is relatively low. The oxidation-reduction method uses strong acids such as sulfuric acid and nitric acid, posing a significant hazard, and requires large amounts of water for washing, resulting in substantial environmental pollution.

[0008] Chemical Vapor Deposition (CVD): CVD is a method for producing graphene films using carbon-containing organic gases as raw materials through vapor deposition. This is the most efficient method for producing graphene films. Graphene produced using this method has the advantages of large area and high quality, but currently, the cost is high, and the process conditions need further improvement. Because graphene films are very thin, large-area graphene films cannot be used alone; they must be attached to macroscopic devices to have practical value, such as touchscreens and heating devices.

[0009] The Future Prospects of Graphene: Graphene holds promise as a next-generation device in numerous application fields. To explore its broader applications, further research is needed to develop superior graphene preparation processes for better application. Although graphene has only been synthesized and proven to exist for a little over a decade, it has already become a hot research topic. Its excellent optical, electrical, mechanical, and thermal properties have prompted researchers to conduct in-depth studies. As graphene preparation methods continue to be developed, it will undoubtedly be more widely used in various fields in the near future.

[0010] The industrialization of graphene is still in its early stages, and some applications are not yet sufficient to demonstrate the many "ideal" properties of graphene. Meanwhile, many researchers around the world are exploring "killer applications." In the future, there will be many challenges in testing and certification, requiring continuous innovation in methods and approaches.

[0011] Graphene, like carbon nanotubes, is a new type of nanomaterial for energy storage, and there is a great demand for it. Currently, only OCSiAl has achieved mass production of single-walled carbon nanotubes globally, with an annual output of 75 tons in 2024 and an expected annual output of 135 tons in 2025. OCSiAl's production conditions are extremely demanding. Utility Model Content

[0012] The purpose of this invention is to address the problems existing in the prior art by providing a slit shear that can efficiently produce single-walled carbon nanotubes and graphene.

[0013] The objective of this utility model is achieved through the following technical solution:

[0014] A slit shear, characterized in that: the slit shear includes a housing, within which an upper slit assembly and a lower slit assembly are embedded, arranged vertically opposite to each other; a zigzag slit channel is formed between the bottom of the upper slit assembly and the top of the lower slit assembly, the height of which is 50 nm to 1000 nm; an inlet assembly and an outlet assembly are sealed at both ends of the housing; the slit shear can withstand a pressure of 50 MPa.

[0015] A sealing ring is embedded between the inlet component and the inlet end of the housing, and the sealing ring is embedded in the end face of the inlet component and / or the inlet end face of the housing; a sealing ring is embedded between the outlet component and the inlet end of the housing, and the sealing ring is embedded in the end face of the outlet component and / or the outlet end face of the housing; the two end faces of the upper slit component and the lower slit component are respectively flush with the two end faces of the housing.

[0016] Limiting bosses are provided on the inner walls of both sides of the housing. The fitting area formed by the top of the two limiting bosses and the top of the inner cavity of the housing can just accommodate the upper part of the upper slit assembly, and the fitting area formed by the bottom of the two limiting bosses and the inner cavity of the housing can just accommodate the bottom of the lower slit assembly. The upper slit assembly and the lower slit assembly, which fit together and can form a slit channel, are first assembled and then pushed into the housing. The limiting bosses, the upper slit assembly and the lower slit assembly in the housing cooperate with each other to limit the height of the slit channel itself. The inlet of the slit channel is provided with a flared mouth that opens towards the inlet assembly and the outlet of the slit channel is provided with a flared mouth that opens towards the outlet assembly.

[0017] The slit channel includes a horizontal channel, an ascending channel, and a descending channel. Alternating horizontal and ascending channels constitute a gradually ascending channel, which begins and ends at the horizontal channel. Alternating horizontal and descending channels constitute a gradually descending channel, which begins and ends at the horizontal channel. Alternating ascending and descending channels constitute a slit channel. The slit channel may begin at the gradually ascending channel and end at the gradually descending channel, or the slit channel may begin at the gradually descending channel and end at the gradually ascending channel.

[0018] The slit channel is shaped like a right-angled zigzag line. This right-angled zigzag slit channel includes only horizontal and vertical channels. The vertical channels include vertically ascending and vertically descending channels. Alternating horizontal and vertically ascending channels constitute a right-angled zigzag ascending channel, which begins and ends at a horizontal channel. Alternating horizontal and vertically descending channels constitute a right-angled zigzag descending channel, which begins and ends at a horizontal channel. Alternating right-angled zigzag ascending and descending channels constitute the slit channel. Alternatively, the slit channel may begin with a right-angled zigzag ascending channel and end with a right-angled zigzag descending channel, or vice versa.

[0019] An adjustment mechanism is provided at the horizontal channel of the slit channel. The adjustment mechanism can adjust the working height of the slit channel from 0nm to 1000nm. The adjustment mechanism includes an adjustment block embedded in the adjustment groove. An adjustment spring is provided at the tail of the adjustment block. The front end of the adjustment block abuts against the bottom of the upper slit component and / or the top of the lower slit component under the action of the adjustment spring. The adjustment block closes the slit channel, and the adjustment block can be pushed open by the pressure of the fluid. While adjusting the gap of the slit channel, the complexity of the zigzag line is increased, thereby enhancing the shearing ability of the slit channel.

[0020] An adjustment mechanism capable of closing the slit channel is provided in the horizontal channel between the second horizontal channel from the inlet of the slit channel and the second horizontal channel from the end of the slit channel; the adjustment mechanism is provided entirely on the upper slit assembly, or entirely on the lower slit assembly, or simultaneously on both the upper and lower slit assemblies.

[0021] The adjustment mechanism is spaced between the upper slit assembly and the lower slit assembly. The end of the adjustment block is provided with a limiting block located on both sides of the adjustment spring. The adjustment block can be embedded in the adjustment groove on the slit body and the limiting block can be embedded in the corresponding groove on the slit body. A pressure plate is fixed to the slit body away from the slit channel by bolts. The pressure plate can limit the adjustment mechanism within the slit body.

[0022] The slit assembly includes an upper slit body, an upper adjusting block, a top adjusting spring, and a top pressure plate. The upper adjusting block is fitted with the top adjusting spring at its upper part and is inserted downward into the upper adjusting groove inside the upper slit body. The top pressure plate presses downward onto the top of the top adjusting spring and is fixed to the top groove of the upper slit body with bolts. The upper edge of the pressure plate is flush with the upper edge of the upper slit body. Top limiting blocks are arranged on both sides of the top of the upper adjusting block, and top recesses are arranged on both sides of the upper adjusting groove that are lower than the top groove of the upper slit body. The top limiting blocks can be embedded in the top recesses, and the upper edge of the top limiting blocks is flush with the bottom of the top groove of the upper slit body.

[0023] The slit assembly includes a lower slit body, a lower adjusting block, a bottom adjusting spring, and a bottom pressure plate. The lower adjusting block is fitted with the bottom adjusting spring at its lower part and is inserted upward into the lower adjusting groove inside the lower slit body. The bottom pressure plate presses upward against the bottom of the bottom adjusting spring and is fixed to the bottom groove of the lower slit body with bolts. The lower edge of the pressure plate is flush with the lower edge of the lower slit body. Bottom limiting blocks are arranged on both sides of the bottom of the lower adjusting block, and bottom recesses that are higher than the bottom groove of the lower slit body are arranged on both sides of the lower adjusting groove. The bottom limiting blocks can be embedded in the bottom recesses, and the lower edge of the bottom limiting blocks is flush with the top of the bottom groove of the lower slit body.

[0024] It should be noted that in order for the slit shear to withstand sufficient pressure, the slit body must maintain a certain thickness in the area through which the slit channel passes. According to current calculations, the thickness of the slit body at the location of the shortest adjustment groove should not be less than 54% of the average thickness of the slit body at the location of the adjustment groove, and it is better to be in the range of 58% to 65%.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] The slit shear of this invention makes it possible to produce single-walled carbon nanotubes and graphene by peeling off the outer layer of multi-walled carbon nanotubes. This reduces the technical requirements for single-walled carbon nanotubes, breaks through foreign technical barriers, and can provide practical assistance to the growing domestic demand for single-walled carbon nanotubes.

[0027] This invention's slit shear produces single-walled carbon nanotubes and graphene with low energy consumption, zero pollution and emissions, and is environmentally friendly. Existing chemical vapor deposition (CVD) processes for producing single-walled carbon nanotubes or graphene require high-temperature sintering, resulting in high energy consumption and waste gas emissions. Producing one ton of carbon nanotubes consumes 11,000-12,000 kWh of electricity and emits more than 100 tons of CO2. Producing one ton of graphene consumes approximately 40,000-50,000 kWh of electricity. In contrast, using a slit shear coupled with supercritical CO2 and ultrasonic equipment to produce one ton of single-walled carbon nanotubes and eight tons of graphene consumes approximately 30,000-50,000 kWh of electricity and produces no waste.

[0028] The slit shear of this invention has a reasonable structure, is easy to manufacture, and has low equipment cost. It fully considers the feasibility of manufacturing and processing, and the modular design and assembly reduces the manufacturing difficulty, thus better transforming intellectual property rights into productivity.

[0029] The slit shear of this invention provides an adjusting block that, under the action of spring force, can adjust the height of the slit channel within the range of 0-1000 nm. According to the different slurries to be sheared and the pressure of the shearing pump, the adjusting block is driven to automatically adjust the height of the slit channel, so as to improve the shearing effect. It is suitable for the homogenization of nanomaterials and the exfoliation of multi-walled carbon nanotube materials.

[0030] The slit shear of this invention can also be used for homogenization of nano-slurries, resulting in more uniform quality and higher efficiency compared to simple stirring and homogenization. Attached Figure Description

[0031] Appendix Figure 1 A schematic diagram of the overall structure of the slit shear provided by this utility model;

[0032] Appendix Figure 2 An exploded structural diagram of the slit shear provided by this utility model;

[0033] Appendix Figure 3 A cross-sectional structural schematic diagram of the slit shear provided by this utility model;

[0034] Appendix Figure 4 For the appendix Figure 3 A magnified structural diagram of circle A in the diagram;

[0035] Appendix Figure 5 An exploded structural diagram of the slit assembly provided by this utility model;

[0036] Appendix Figure 6 An exploded structural diagram of the slit-mounted component provided by this utility model;

[0037] Appendix Figure 7 The electron microscope image obtained by 100,000x electron microscopy after the slit shear of this utility model peels off multi-walled carbon nanotubes shows single-walled carbon nanotubes and graphene.

[0038] Appendix Figure 8 The image shows a single-walled carbon nanotube after the slit shear of this invention has peeled off multi-walled carbon nanotubes using a 100,000x electron microscope.

[0039] Appendix Figure 9 The image shown is a magnified view of a semi-open single-walled carbon nanotube obtained by electron microscopy at 100,000x magnification after the slit shear of this invention peels off multi-walled carbon nanotubes.

[0040] Appendix Figure 10The graphene is shown in the electron microscope image obtained by 100,000x electron microscopy after the slit shear of this invention peels off multi-walled carbon nanotubes.

[0041] Wherein: 1—Housing; 11—Limiting boss; 2—Inlet component; 3—Outlet component; 4—Upper slit component; 41—Upper slit body; 42—Upper adjusting groove; 43—Upper adjusting block; 44—Top groove; 45—Top limiting block; 46—Top adjusting spring; 47—Top pressure plate; 5—Lower slit component; 51—Lower slit body; 52—Lower adjusting groove; 53—Lower adjusting block; 54—Bottom groove; 55—Bottom limiting block; 56—Bottom adjusting spring; 57—Bottom pressure plate; 6—Sealing ring; 7—Slit channel; 8—Flare mouth. Detailed Implementation

[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0043] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0044] like Figure 1-6 As shown: A slit shear capable of withstanding 50 MPa pressure includes a housing 1. An upper slit assembly 4 and a lower slit assembly 5, arranged vertically opposite each other, are embedded within the housing 1. The end faces of the upper slit assembly 4 and the lower slit assembly 5 are flush with the end faces of the housing 1. A zigzag-shaped slit channel 7 is formed between the bottom of the upper slit assembly 4 and the top of the lower slit assembly 5, with a height of 50 nm to 1000 nm. An inlet assembly 2 and an outlet assembly 3 are sealed to both ends of the housing 1. A sealing ring 6 is embedded between the inlet assembly 2 and the inlet end of the housing 1, and the sealing ring 6 is embedded within the end face of the inlet assembly 2 and / or the inlet end face of the housing 1. A sealing ring 6 is also embedded between the outlet assembly 3 and the inlet end of the housing 1, and the sealing ring 6 is embedded within the end face of the outlet assembly 3 and / or the outlet end face of the housing 1.

[0045] Regarding how to ensure the height of the slit channel 7, the solution provided by this utility model is to set a limiting boss 11. The limiting boss 11 is respectively set on the inner walls of both sides of the housing 1. The embedding area formed by the top of the two limiting bosses 11 and the top of the inner cavity of the housing 1 can just accommodate the upper part of the upper slit component 4, and the embedding area formed by the bottom of the two limiting bosses 11 and the inner cavity of the housing 1 can just accommodate the bottom of the lower slit component 5. The upper slit component 4 and the lower slit component 5, which fit together and can form the slit channel 7, are first combined and then pushed into the housing 1. The limiting boss 11, the upper slit component 4 and the lower slit component 5 in the housing 1 cooperate with each other to limit the height of the slit channel 7. In addition, in order to buffer the inlet and outlet of the slit channel 7, a flared mouth 8 with an opening facing the inlet component 2 is provided at the inlet of the slit channel 7, and a flared mouth 8 with an opening facing the outlet component 3 is provided at the outlet of the slit channel 7.

[0046] Regarding the specific structure of the slit channel 7, this utility model provides two technical approaches.

[0047] The slit channel 7 in the first technical approach includes a horizontal channel, an upward channel (a straight channel with an indeterminate tilt angle), and a downward channel (a straight channel with an indeterminate tilt angle). The alternating horizontal and upward channels constitute a gradually upward channel, which begins and ends at the horizontal channel. The alternating horizontal and downward channels constitute a gradually downward channel, which begins and ends at the horizontal channel. The alternating gradually upward and downward channels constitute the slit channel 7. In other words, the slit channel 7 begins at the gradually upward channel and ends at the gradually downward channel, or the slit channel 7 begins at the gradually downward channel and ends at the gradually upward channel.

[0048] In the second technical approach, the slit channel 7 is shaped like a right-angled zigzag line. This right-angled zigzag slit channel 7 consists only of horizontal and vertical channels. The vertical channels include vertically ascending and descending channels. Alternating horizontal and vertically ascending channels constitute a right-angled zigzag ascending channel, which begins and ends at a horizontal channel. Similarly, alternating horizontal and vertically descending channels constitute a right-angled zigzag descending channel, which begins and ends at a horizontal channel. The alternating right-angled zigzag ascending and descending channels constitute the slit channel 7. Furthermore, the slit channel 7 either begins and ends at a right-angled zigzag ascending channel or at a right-angled zigzag descending channel. Because each corner of the right-angled zigzag slit channel 7 possesses very strong shearing performance, the shearing performance of the slit channel 7 in the second technical approach is superior to that in the first technical approach.

[0049] To further improve the shearing performance of the slit channel 7, an adjustment mechanism is provided at the horizontal channel of the slit channel 7. The adjustment mechanism can adjust the working height of the slit channel 7 from 0 nm to 1000 nm. The adjustment mechanism includes an adjustment block embedded in the adjustment groove. An adjustment spring is provided at the tail of the adjustment block. The front end of the adjustment block abuts against the bottom of the upper slit component 4 and / or the top of the lower slit component 5 under the action of the adjustment spring, thereby closing the slit channel 7 through the adjustment block. The adjustment block can also be pushed open by the pressure of the fluid. While adjusting the gap of the slit channel 7, the complexity of the zigzag line is increased, thereby enhancing the shearing ability of the slit channel 7.

[0050] In order to effectively receive the fluid and allow for a buffer space when the fluid exits, the adjustment mechanism that can close the slit channel 7 is not installed in the horizontal channel from the first horizontal channel in the inlet of the slit channel 7 to the penultimate horizontal channel at the outlet of the slit channel 7. Instead, the adjustment mechanism that can close the slit channel 7 is installed in the horizontal channel between the second horizontal channel in the inlet of the slit channel 7 and the penultimate horizontal channel at the outlet of the slit channel 7.

[0051] Depending on the needs, the adjustment mechanisms can be all located on the upper slit assembly 4, or all located on the lower slit assembly 5, or both located on the upper slit assembly 4 and the lower slit assembly 5.

[0052] To ensure the most stable operation of the slit shear, a suitable technical solution is to set the adjustment mechanism at intervals on the upper slit assembly 4 and the lower slit assembly 5. The end of the adjustment block is provided with a limiting block located on both sides of the adjustment spring. The adjustment block can be embedded in the adjustment groove on the slit body and the limiting block can be embedded in the corresponding groove on the slit body. A pressure plate is fixed to the slit body away from the slit channel 7 by bolts. The pressure plate can limit the adjustment mechanism within the slit body.

[0053] Specifically, such as Figure 5 The slit assembly 4 shown includes an upper slit body 41, an upper adjusting block 43, a top adjusting spring 46, and a top pressure plate 47. The upper adjusting block 43 is correspondingly embedded with the top adjusting spring 46 at its upper part and is inserted downward into the upper adjusting groove 42 in the upper slit body 41. The top pressure plate 47 presses downward onto the top of the top adjusting spring 46 and is fixed to the top groove of the upper slit body 41 with bolts. The upper edge of the pressure plate 47 is flush with the upper edge of the upper slit body 41. Top limiting blocks 45 are arranged on both sides of the top of the upper adjusting block 43, and top recesses 44 lower than the top groove of the upper slit body 41 are arranged on both sides of the upper adjusting groove 42. The top limiting blocks 45 can be embedded in the top recesses 44, and the upper edge of the top limiting blocks 45 is flush with the bottom of the top groove of the upper slit body 41.

[0054] Specifically, such as Figure 6The slit lower assembly 5 shown includes a lower slit body 51, a lower adjusting block 53, a bottom adjusting spring 56, and a bottom pressure plate 57. The lower part of the lower adjusting block 53 is correspondingly embedded with the bottom adjusting spring 56, and the lower adjusting block 53 is inserted upward into the lower adjusting groove 52 in the lower slit body 51. The bottom pressure plate 57 presses upward against the bottom of the bottom adjusting spring 56 and is fixed in the bottom groove of the lower slit body 51 with bolts. The lower edge of the pressure plate 57 is flush with the lower edge of the lower slit body 51. Bottom limiting blocks 55 are arranged on both sides of the bottom of the lower adjusting block 53, and bottom inserts 54 that are higher than the bottom groove of the lower slit body 51 are arranged on both sides of the lower adjusting groove 52. The bottom limiting blocks 55 can be embedded in the bottom inserts 54, and the lower edge of the bottom limiting blocks 55 is flush with the top of the bottom groove of the lower slit body 51. Example

[0055] like Figure 1-6 The slit shear shown can withstand a pressure of 50 MPa. The slit shear includes a housing 1, an inlet assembly 2, an outlet assembly 3, an upper slit assembly 4, a lower slit assembly 5, and a sealing ring 6. Limiting bosses 11 are respectively provided on the inner walls of both sides of the housing 1. The fitting area formed by the tops of the two limiting bosses 11 and the top of the inner cavity of the housing 1 precisely accommodates the upper part of the upper slit assembly 4, and the fitting area formed by the bottoms of the two limiting bosses 11 and the inner cavity of the housing 1 precisely accommodates the bottom of the lower slit assembly 5. The upper slit assembly 4 and the lower slit assembly 5, arranged vertically and fitting together to form a right-angled zigzag slit channel 7, are first assembled and then pushed into the housing 1. The limiting bosses 11, the upper slit assembly 4, and the lower slit assembly 5 within the housing 1... The components 5 cooperate to limit the height of the slit channel 7 to 50nm~1000nm; in addition, in order to buffer the inlet and outlet of the slit channel 7, a flared mouth 8 with an opening facing the inlet component 2 is provided at the inlet of the slit channel 7 and a flared mouth 8 with an opening facing the outlet component 3 is provided at the outlet of the slit channel 7; the inlet component 2 and the outlet component 3 are sealed and connected at both ends of the housing 1, wherein a sealing ring 6 is embedded between the inlet component 2 and the inlet end of the housing 1, and the sealing ring 6 is embedded in the end face of the inlet component 2 and / or the end face of the inlet end of the housing 1; a sealing ring 6 is embedded between the outlet component 3 and the inlet end of the housing 1, and the sealing ring 6 is embedded in the end face of the outlet component 3 and / or the end face of the outlet end of the housing 1.

[0056] The right-angled zigzag slit channel 7 includes only horizontal and vertical channels. The vertical channels include vertically ascending and vertically descending channels. Alternating horizontal and vertically ascending channels constitute a right-angled zigzag ascending channel, and alternating horizontal and vertically descending channels constitute a right-angled zigzag descending channel. Alternating right-angled zigzag ascending and descending channels constitute the slit channel 7. Figure 3As shown, starting from the flared opening 8 at the inlet of the slit channel 7, the structure of the slit channel 7 provided in this embodiment is as follows: flared opening 8 → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical rising channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → vertical falling channel → horizontal channel → flared opening 8. The rising height and falling height are the same, and the lifting ratio relative to the central axis of the housing 1 is the same, so that the inlet and outlet of the slit channel 7 are located at the same horizontal position.

[0057] Additionally, adjustment mechanisms are spaced apart on the upper slit assembly 4 and the lower slit assembly 5. These mechanisms can adjust the working height of the slit channel 7 from 0 nm to 1000 nm. The adjustment mechanism includes an adjustment groove and an adjustment block with an adjustment spring. The adjustment block closes the slit channel 7, and the block can be pushed open by fluid pressure. This arrangement increases the complexity of the right-angled zigzag line while adjusting the gap of the slit channel 7, thereby enhancing the shearing capacity of the slit channel 7. Specifically, as... Figure 5 The slit assembly 4 shown and as Figure 6The slit lower assembly 5 and slit upper assembly 4 shown include an upper slit body 41, an upper adjusting block 43, a top adjusting spring 46, and a top pressure plate 47. The upper adjusting block 43 is fitted with the top adjusting spring 46 at its upper part and is inserted downward into the upper adjusting groove 42 in the upper slit body 41. The top pressure plate 47 presses downward against the top of the top adjusting spring 46 and is fixed to the top groove of the upper slit body 41 with bolts. The upper edge of the pressure plate 47 is flush with the upper edge of the upper slit body 41. Top limiting blocks 45 are arranged on both sides of the top of the upper adjusting block 43, and top recesses 44 lower than the top groove of the upper slit body 41 are arranged on both sides of the upper adjusting groove 42. The top limiting blocks 45 can be embedded in the top recesses 44, and the upper edge of the top limiting blocks 45 is flush with the bottom of the top groove of the upper slit body 41. The bottom of the upper adjusting block 43 rests on the top surface of the corresponding lower slit body 51, thereby closing the slit at that location. The slit channel 7; the lower slit assembly 5 includes a lower slit body 51, a lower adjusting block 53, a bottom adjusting spring 56, and a bottom pressure plate 57. The lower part of the lower adjusting block 53 is correspondingly embedded with the bottom adjusting spring 56, and the lower adjusting block 53 is inserted upward into the lower adjusting groove 52 in the lower slit body 51. The bottom pressure plate 57 presses upward against the bottom of the bottom adjusting spring 56 and is fixed in the bottom groove of the lower slit body 51 with bolts. The lower edge of the pressure plate 57 is flush with the lower edge of the lower slit body 51. Bottom limiting blocks 55 are arranged on both sides of the bottom of the lower adjusting block 53, and bottom inserts 54 that are higher than the bottom groove of the lower slit body 51 are arranged on both sides of the lower adjusting groove 52. The bottom limiting blocks 55 can be embedded in the bottom inserts 54, and the lower edge of the bottom limiting blocks 55 is flush with the top of the bottom groove of the lower slit body 51. The bottom of the lower adjusting block 53 rests on the bottom surface of the corresponding upper slit body 51, thereby closing the slit channel 7 at that location.

[0058] In use, the slit shear of this invention has inlet component 2 and outlet component 3 connected to pipes. High-pressure fluid enters from inlet component 2 through flared opening 8 into 15 slit channels 7 sealed by upper adjusting block 43 and lower adjusting block 53. Under pressure, the upper adjusting block 43 and lower adjusting block 53 are pushed open to varying degrees depending on the pressure, thereby enhancing the shearing ability of the slit channel 7 on the substances in the high-pressure fluid. The sheared high-pressure fluid is then output through outlet component 3. Based on this, adjusting springs of different strengths can be provided to adjust the shearing effect.

[0059] The slit shear of this invention works even better when used in conjunction with ultrasonic or supercritical equipment. Producing one ton of single-walled carbon nanotubes and eight tons of graphene consumes approximately 30,000-50,000 kWh of electricity and produces no waste. Using this slit shear in conjunction with ultrasonic or supercritical equipment to exfoliate multi-walled carbon nanotubes, the resulting single-walled carbon nanotubes and graphene are shown in electron microscope images under 100,000x magnification. Figure 7As shown, the tubular structures are single-walled carbon nanotubes, and the white sand-like structures are exfoliated graphene; Figure 8 The provided electron microscopy images particularly demonstrate the large number of single-walled carbon nanotubes obtained after exfoliation, with five single-walled carbon nanotubes indicated by red arrows; however, during the exfoliation process, there were also issues such as... Figure 9 The electron microscope image shown is of a single-walled carbon nanotube that has been peeled off and is partially open; it can only be used as graphene. Figure 10 This is an electron microscope image of the graphene obtained after peeling.

[0060] The slit shear of this invention provides an adjusting block that, under the action of spring force, can adjust the height of the slit channel within the range of 0-1000nm. Based on the different slurries requiring shearing and the pressure of the shear pump, the adjusting block automatically adjusts the height of the slit channel, resulting in better shearing performance. It is suitable for homogenizing nanomaterials and exfoliating multi-walled carbon nanotubes; it can also be used for homogenizing nanomaterial slurries, achieving more uniform quality and higher efficiency compared to simple stirring homogenization. The slit shear has a reasonable structure, is easy to manufacture, and has low equipment cost. It fully considers the feasibility of manufacturing and processing, and its modular design and assembly reduce manufacturing difficulty, allowing intellectual property rights to be better transformed into productivity.

[0061] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0062] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0063] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A slit shear, characterized in that: The slit shear includes a housing (1), in which an upper slit assembly (4) and a lower slit assembly (5) are embedded, arranged vertically opposite to each other. A zigzag slit channel (7) is formed between the bottom of the upper slit assembly (4) and the top of the lower slit assembly (5). The height of the slit channel (7) is 50 nm to 1000 nm. An inlet assembly (2) and an outlet assembly (3) are sealed at both ends of the housing (1). The slit shear can withstand a pressure of 50 MPa.

2. The slit shear according to claim 1, characterized in that: A sealing ring (6) is embedded between the inlet end of the inlet component (2) and the inlet end of the housing (1), and the sealing ring (6) is embedded in the end face of the inlet component (2) and / or the end face of the inlet end of the housing (1); a sealing ring (6) is embedded between the outlet component (3) and the inlet end of the housing (1), and the sealing ring (6) is embedded in the end face of the outlet component (3) and / or the end face of the outlet end of the housing (1); the two end faces of the upper slit component (4) and the lower slit component (5) are respectively flush with the two end faces of the housing (1).

3. The slit shear according to claim 1, characterized in that: Limiting bosses (11) are provided on the inner walls of both sides of the housing (1). The embedding area formed by the top of the two limiting bosses (11) and the top of the inner cavity of the housing (1) can just accommodate the upper part of the upper slit assembly (4). The embedding area formed by the bottom of the two limiting bosses (11) and the inner cavity of the housing (1) can just accommodate the bottom of the lower slit assembly (5). The upper slit assembly (4) and the lower slit assembly (5) that fit together and can form a slit channel (7) are first combined and then pushed into the housing (1). The limiting bosses (11), the upper slit assembly (4) and the lower slit assembly (5) in the housing (1) cooperate to limit the height of the slit channel (7). The inlet of the slit channel (7) is provided with a flared mouth (8) facing the inlet assembly (2) and the outlet of the slit channel (7) is provided with a flared mouth (8) facing the outlet assembly (3).

4. The slit shear according to claim 1, characterized in that: The slit channel (7) includes a horizontal channel, an upward channel and a downward channel. The alternating horizontal and upward channels constitute a gradually upward channel, which begins and ends at the horizontal channel. The alternating horizontal and downward channels constitute a gradually downward channel, which begins and ends at the horizontal channel. The alternating gradually upward and downward channels constitute the slit channel (7). The slit channel (7) begins at the gradually upward channel and ends at the gradually downward channel, or the slit channel (7) begins at the gradually downward channel and ends at the gradually upward channel.

5. The slit shear according to claim 1, characterized in that: The slit channel (7) is in the shape of a right-angled broken line. The right-angled broken line slit channel (7) includes only a horizontal channel and a vertical channel. The vertical channel includes a vertically ascending channel and a vertically descending channel. The alternating horizontal channel and vertically ascending channel constitute a right-angled broken line ascending channel. The right-angled broken line ascending channel starts from the horizontal channel and ends at the horizontal channel. The alternating horizontal channel and vertically descending channel constitute a right-angled broken line descending channel. The right-angled broken line descending channel starts from the horizontal channel and ends at the horizontal channel. The alternating right-angled broken line ascending channel and right-angled broken line descending channel constitute the slit channel (7). The slit channel (7) starts from the right-angled broken line ascending channel and ends at the right-angled broken line descending channel, or the slit channel (7) starts from the right-angled broken line descending channel and ends at the right-angled broken line ascending channel.

6. The slit shear according to any one of claims 1-5, characterized in that: An adjustment mechanism is provided at the horizontal channel of the slit channel (7). The adjustment mechanism can adjust the working height of the slit channel (7) to 0nm~1000nm. The adjustment mechanism includes an adjustment block embedded in the adjustment groove. An adjustment spring is provided at the tail of the adjustment block. The front end of the adjustment block abuts against the bottom of the upper slit assembly (4) and / or the top of the lower slit assembly (5) under the action of the adjustment spring, thereby closing the slit channel (7) through the adjustment block. The adjustment block can be pushed open by the pressure of the fluid. While adjusting the gap of the slit channel (7), the complexity of the zigzag line is increased, thereby strengthening the shearing ability of the slit channel (7).

7. The slit shear according to claim 6, characterized in that: An adjustment mechanism capable of closing the slit channel (7) is provided in the horizontal channel between the second horizontal channel from the inlet of the slit channel (7) and the second horizontal channel from the end of the slit channel (7); the adjustment mechanism is provided entirely on the upper slit assembly (4), or entirely on the lower slit assembly (5), or simultaneously on both the upper slit assembly (4) and the lower slit assembly (5).

8. The slit shear according to claim 7, characterized in that: The adjustment mechanism is spaced between the upper slit assembly (4) and the lower slit assembly (5). The end of the adjustment block is provided with a limiting block located on both sides of the adjustment spring. The adjustment block can be embedded in the adjustment groove on the slit body and the limiting block can be embedded in the corresponding groove on the slit body. A pressure plate is fixed to the slit body away from the slit channel (7) by bolts. The pressure plate can limit the adjustment mechanism within the slit body.

9. The slit shear according to claim 8, characterized in that: The slit assembly (4) includes an upper slit body (41), an upper adjusting block (43), a top adjusting spring (46), and a top pressure plate (47). The upper adjusting block (43) is fitted with the top adjusting spring (46) at its upper part and is inserted downward into the upper adjusting groove (42) in the upper slit body (41). The top pressure plate (47) presses downward onto the top of the top adjusting spring (46) and is fixed to the top of the upper slit body (41) with bolts. Inside the groove, the upper edge of the top pressure plate (47) is flush with the upper edge of the upper slit body (41). The upper adjusting block (43) is provided with top limiting blocks (45) on both sides of the top, and the upper adjusting groove (42) is provided with top inserts (44) that are lower than the top groove of the upper slit body (41) on both sides. The top limiting block (45) can be inserted into the top insert (44), and the upper edge of the top limiting block (45) is flush with the bottom of the top groove of the upper slit body (41).

10. The slit shear according to claim 8, characterized in that: The slit lower assembly (5) includes a lower slit body (51), a lower adjusting block (53), a bottom adjusting spring (56), and a bottom pressure plate (57). The lower adjusting block (53) is fitted with the bottom adjusting spring (56) at its lower part and is inserted upward into the lower adjusting groove (52) in the lower slit body (51). The bottom pressure plate (57) presses upward against the bottom of the bottom adjusting spring (56) and is fixed to the bottom of the lower slit body (51) with bolts. Inside the groove, the lower edge of the bottom pressure plate (57) is flush with the lower edge of the lower slit body (51). The bottom of the lower adjustment block (53) is provided with bottom limiting blocks (55) on both sides, and the lower adjustment groove (52) is provided with bottom grooves (54) that are higher than the bottom groove of the lower slit body (51) on both sides. The bottom limiting block (55) can be embedded in the bottom groove (54), and the lower edge of the bottom limiting block (55) is flush with the top of the bottom groove of the lower slit body (51).

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