Microfluidic Interactive Cavity and Homogenizer for Preparing Conductive Paste

Abstract

This invention discloses a microjets interactive cavity and a homogenizer for preparing conductive slurries, belonging to the field of carbon materials technology. The microjets interactive cavity includes a shell, a roller, an impact ring, and a switching valve. The shell has a high-pressure inlet channel and a low-pressure outlet channel. The roller is rotatably fitted onto the shell. On the peripheral sidewall of the roller, extending axially along the roller, are spaced-apart shear channels one and two. The impact ring is sleeved and installed on the peripheral sidewall of the roller. On the inner peripheral wall of the impact ring, along the circumferential direction, are spaced-apart impact chambers one and two, aligned and communicating with the shear channels. The end of the high-pressure inlet channel branches out to form two branch channels. The shell also has spaced-apart cooling channels one and two. The microjets interactive cavity and homogenizer for preparing conductive slurries of this invention can effectively improve the cooling effect of the microjets.

Description

Technical Field

[0001] This invention relates to the field of carbon materials technology, specifically to a microfluidic interactive cavity and a homogenizer for preparing conductive pastes. Background Technology

[0002] The homogenization of existing conductive pastes usually uses a microfluidic homogenizer to disperse the material. Its main component is the microfluidic interactive cavity, which utilizes the shearing and impact effects generated on the material as it passes through the tiny homogenizing chambers in the microfluidic interactive cavity to achieve homogenization.

[0003] The micro-jet interactive cavity is equipped with shear channels that apply shear force to the material. When the material passes through the shear channels and impact chambers of the micro-jet interactive cavity under ultra-high pressure, it will generate violent shearing and impact. These mechanical forces will cause the material temperature to rise. If it is not cooled in time, the high temperature may damage the original physical or chemical properties of the material. Moreover, the micro-jet interactive cavity is usually made of diamond or ceramic homogeneous cavity. Although it has strong high temperature resistance, long-term high temperature environment may accelerate material aging. In addition, overheating may cause deformation of the material channel, thereby affecting the uniformity of the homogeneous particle size distribution. The existing method of cooling the micro-jet interactive cavity is to design an additional water-cooling channel on the outer shell near the micro-jet channel, so that heat is conducted to the water-cooling channel and exchanged with the cooling medium to achieve heat exchange and cooling. However, the cooling effect of this design needs to be improved.

[0004] Therefore, it is necessary to provide a new type of microfluidic interactive cavity and a homogenizer for preparing conductive pastes. Summary of the Invention

[0005] Based on the aforementioned problems in the prior art, the purpose of this invention is to provide a microfluidic interactive cavity and a homogenizer for preparing conductive slurry, which can effectively improve the cooling effect of the microfluidic channel.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A micro-jet interactive cavity is provided, comprising a shell, a roller, an impact ring, and a switching valve. The shell is provided with a high-pressure inlet channel and a low-pressure outlet channel. The roller is rotatably fitted onto the shell, and the axis of the roller is perpendicular to the axis of the shell. Shear channels one and two, spaced apart, are provided on the peripheral sidewall of the roller and extending axially along the roller. The impact ring is sleeved and installed on the peripheral sidewall of the roller. Impact chamber one and impact chamber two, spaced apart circumferentially along the inner peripheral wall of the impact ring, are provided. Impact chamber one is aligned with and communicates with shear channel two, and impact chamber two is aligned with and communicates with shear channel two. The two diversion channels extend to both ends of the roller. The end of the high-pressure inlet channel branches out to form two diversion channels. The channels extend close to both ends of the roller body. The outer shell is also provided with a spaced-apart cooling channel one and a cooling channel two. Cooling channel one and cooling channel two are close to both ends of the roller body. The switching valve is installed on the outer shell and close to the low-pressure outlet channel. When the roller body rotates to the first position, that is, the two diversion channels are aligned and connected with the two ends of shear channel one, and cooling channel one and cooling channel two are aligned and connected with the two ends of shear channel two. At the same time, the switching valve switches to the first position, that is, the impact chamber one is connected to the low-pressure outlet channel. When the roller body rotates to the second position, that is, the two diversion channels are aligned and connected with the two ends of shear channel two, and cooling channel one and cooling channel two are aligned and connected with the two ends of shear channel one. At the same time, the switching valve switches to the second position, that is, the impact chamber two is connected to the low-pressure outlet channel.

[0007] Furthermore, the roller body has a cylindrical structure, and an installation cavity is provided on the outer shell between the high-pressure inlet channel and the low-pressure outlet channel. The shape of the installation cavity is adapted to the shape of the roller body, and the outer peripheral wall of the roller body is sealed to the peripheral side wall of the installation cavity.

[0008] Furthermore, the first shear channel and the second shear channel are arranged alternately along the circumference of the roller body.

[0009] Furthermore, one or more shear channels are uniformly and spaced along the circumference of the roller body, and one or more shear channels are uniformly and spaced along the circumference of the roller body. The impact ring is provided with the same number of impact chambers as the shear channels and the same number of impact chambers as the shear channels.

[0010] Furthermore, the outer shell is provided with two flow guide channels located at both ends of the roller body, and the two flow guide channels are respectively connected to two flow splitting channels. The flow guide channels are arranged in a circular array around the axis of the roller body, and the shape of the flow guide channels corresponds to the distribution structure of shear channel one or shear channel two on the roller body.

[0011] Furthermore, the outer peripheral wall of the impact ring is provided with annular groove one and annular groove two. Annular groove one and annular groove two extend around the circumference of the impact ring and are spaced apart along the axial direction of the impact ring. Annular groove one and impact cavity one are connected through a connecting hole, and annular groove two and impact cavity two are connected through a connecting hole. The outer peripheral wall of the impact ring is sealed to the outer shell. The outer shell is also provided with valve port one and valve port two spaced apart. Valve port one is connected between the switching valve and annular groove one, and valve port two is connected between the switching valve and annular groove two.

[0012] Furthermore, one end of the mounting cavity is open, and an end limiting block is installed on the outer shell at the opening position of the mounting cavity.

[0013] Furthermore, at least one end of the roller is equipped with a rotating shaft, and the roller is rotatably engaged with the outer casing via the rotating shaft.

[0014] Furthermore, the switching valve is a two-position three-way valve.

[0015] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a homogenizer for preparing conductive slurry, wherein the homogenizer for preparing conductive slurry includes the microfluidic interactive cavity provided by any of the above solutions.

[0016] The beneficial effects of this invention are as follows: The micro-jet interactive cavity and homogenizer for preparing conductive slurry provided by this invention include a shell, a roller, an impact ring, and a switching valve. The shell is provided with a high-pressure inlet channel and a low-pressure outlet channel. The roller is rotatably fitted onto the shell, and the axis of the roller is perpendicular to the axis of the shell. Shear channels one and two are spaced apart on the peripheral wall of the roller and extending axially along the roller. The impact ring is sleeved and installed on the peripheral wall of the roller. Impact chamber one and impact chamber two are spaced apart on the inner peripheral wall of the impact ring along the circumferential direction of the impact ring. Impact chamber one is aligned with and connected to the shear channel, and impact chamber two is aligned with and connected to the shear channel two. The two diversion channels extend to both ends of the roller. The end of the high-pressure inlet channel branches to form two diversion channels, which extend close to both ends of the roller. The shell is also provided with spaced cooling channels one and two, which are close to both ends of the roller. Channel 1 is used for inputting the cooling medium, and channel 2 is used for outputting the cooling medium. The switching valve is installed on the outer shell and near the low-pressure outlet channel. When the roller rotates to the first position, the two diversion channels are aligned with and connected to the two ends of shear channel 1, and cooling channels 1 and 2 are aligned with and connected to the two ends of shear channel 2. At the same time, the switching valve is switched to the first position, that is, impact chamber 1 is connected to the low-pressure outlet channel. In this way, the material enters the two ends of shear channel 1 from the two diversion channels and flows to the middle impact chamber 1. The narrow cross-section of shear channel 1 forces the material to be homogenized, dispersed, emulsified and crushed by shear force. The material is also homogenized, dispersed, emulsified and crushed when it meets and collides in impact chamber 1. Meanwhile, since shear channel 2 is not connected to the diversion channels and impact chamber 2 is not connected to the low-pressure outlet channel, the cooling medium can bypass the flowing material and flow sequentially from cooling channel 1, shear channel 2, impact chamber 2 and cooling channel 2, thereby achieving direct cooling of shear channel 2 and impact chamber 2.When the roller rotates to the second position, the two diversion channels are aligned and connected to the two ends of the shear channel two, and the cooling channels one and two are aligned and connected to the two ends of the shear channel one. Simultaneously, the switching valve switches to the second position, connecting the impact chamber two to the low-pressure outlet channel. In this way, the material enters the two ends of the shear channel two from the two diversion channels and flows towards the middle impact chamber two. The narrow cross-section of the shear channel two forces the material to be homogenized, dispersed, emulsified, and broken down by shear force. Furthermore, the material collides and is homogenized, dispersed, emulsified, and broken down upon encountering the material in the impact chamber two. Meanwhile, because the shear channel one is not connected to the diversion channels, and the impact chamber one is not connected to the low-pressure outlet channel, the cooling medium can avoid... The flowing material sequentially flows through cooling channel one, shear channel one, impact chamber one, and cooling channel two, thereby directly cooling shear channel one and impact chamber one. Through the above design, in the microjet interactive cavity and microjet homogenizer provided by this invention, when the roller rotates to the first position and the switching valve is simultaneously switched to the first position, the material sequentially flows through the high-pressure inlet channel, the diversion channel, shear channel one, impact chamber one, and the low-pressure outlet channel. The material is sheared in shear channel one and impacted in impact chamber one; these mechanical forces homogenize the material. Simultaneously, because cooling channels one and two are aligned with and connected to both ends of shear channel two, the flow... A switching valve isolates the second impact chamber from the low-pressure outlet channel, allowing the cooling medium to pass through the first cooling channel, the second shearing channel, the second impact chamber, and the second cooling channel. This provides direct contact cooling to the heat-generating sections of the second shearing channel and the second impact chamber. Alternatively, the roller rotates to the second position, and the switching valve switches to the second position, causing the material to flow sequentially through the high-pressure inlet channel, the diversion channel, the second shearing channel, the second impact chamber, and the low-pressure outlet channel. The material is subjected to shearing in the second shearing channel and impact in the second impact chamber. These mechanical forces homogenize the material. Simultaneously, because the first and second cooling channels are aligned with and connected to the two ends of the first shearing channel, the switching valve allows the impact... The first cavity is isolated from the low-pressure outlet flow channel, allowing the cooling medium to pass through cooling flow channel one, shear flow channel one, impact cavity one, and cooling flow channel two. This enables direct contact cooling of the heat-generating shear flow channel one and impact cavity one. Combining the above design, a rotatable roller on the outer shell cyclically switches between a first and a second position, while a switching valve also cyclically switches between the first and second positions. This allows shear flow channel two and impact cavity two, and shear flow channel one and impact cavity one, to alternately achieve the most effective heat exchange and cooling through direct contact with the cooling medium. Compared to existing technologies that use cooling outside the micro-jet channels on the outer shell, this method provides faster and better cooling. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 A three-dimensional structural schematic diagram of the microjet interactive cavity provided in an embodiment of the present invention.

[0019] Figure 2 An exploded view of the microjet interactive cavity provided in an embodiment of the present invention.

[0020] Figure 3 This is a front view of the microjet interactive cavity provided in an embodiment of the present invention.

[0021] Figure 4 For along Figure 3 A cross-sectional view along the EE direction.

[0022] Figure 5 for Figure 4 An enlarged schematic diagram of region A in the middle.

[0023] Figure 6 for Figure 5 The diagram shows another state of the microjet interactive cavity.

[0024] Figure 7 This is a schematic diagram showing the positional relationship between the roller and the impact ring provided in an embodiment of the present invention.

[0025] Figure 8 This is a front view of the impact ring provided in an embodiment of the present invention.

[0026] Figure 9 For along Figure 8 A cross-sectional view along the FF direction.

[0027] Figure 10 This is a three-dimensional structural diagram of the end limiting block provided in an embodiment of the present invention.

[0028] Figure 11 This is a perspective view of the end limiting block provided in an embodiment of the present invention.

[0029] Figure 12 This is a front view of the end limiting block provided in an embodiment of the present invention.

[0030] Figure 13 For along Figure 12 A cross-sectional view along the GG direction.

[0031] The reference numerals in the figures are as follows: 1. Outer shell; 101. End limiting block; 11. High-pressure inlet channel; 12. Low-pressure outlet channel; 13. Diverting channel; 15. Guide channel; 16. Cooling channel one; 17. Cooling channel two; 18. Cooling interface one; 19. Cooling interface two; 2. Roller body; 21. Shearing channel one; 22. Shearing channel two; 3. Impact ring; 31. Impact chamber one; 32. Impact chamber two; 33. Ring groove one; 34. Ring groove two; 35. Connecting hole; 4. Rotating shaft; 5. Mounting chamber one; 6. Mounting chamber two; 7. Switching valve; 8. Valve port one; 9. Valve port two. Detailed Implementation

[0032] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 present invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on the present invention.

[0036] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0037] Please refer to Figures 1 to 13 As shown, a microjets interactive cavity provided by the present invention will now be described, and will be... Figure 4 , Figure 5 and Figure 6 The fluid path is simply illustrated by dashed arrows. This microjet interactive cavity includes a shell 1, a roller 2, an impact ring 3, and a switching valve 7. The shell 1 is provided with a high-pressure inlet channel 11 for inputting materials and a low-pressure outlet channel 12 for outputting materials. The roller 2 is rotatably fitted onto the shell 1, and the axis of the roller 2 is perpendicular to the axis of the shell 1. Shear channels 1 and 22, spaced apart, are provided on the peripheral sidewall of the roller 2 and extending axially along the roller 2. The impact ring 3 is sleeved and installed on the peripheral sidewall of the roller 2. Impact chambers 1 and 32, spaced apart circumferentially along the inner peripheral wall of the impact ring 3, are provided. The first 31 is aligned with and connected to the first shear channel 21, and the second impact chamber 32 is aligned with and connected to the second shear channel 22. Two branch channels 13 extend to both ends of the roller body 2. The end of the high-pressure inlet channel 11 branches to form two branch channels 13, which extend close to both ends of the roller body 2. The outer casing 1 is also provided with spaced-apart cooling channels 16 and 17, which are close to both ends of the roller body 2. Cooling channel 16 is used for inputting the cooling medium, and cooling channel 17 is used for outputting the cooling medium. A switching valve 7 is installed on the outer casing 1 and close to the low-pressure outlet channel 12. Figure 5As shown, when roller 2 rotates to the first position, the two diversion channels 13 are aligned and connected to the two ends of shear channel 21, and cooling channels 16 and 17 are aligned and connected to the two ends of shear channel 22. At the same time, switching valve 7 switches to the first position, that is, the impact chamber 31 is connected to the low-pressure outlet channel 12. In this way, the material enters the two ends of shear channel 21 from the two diversion channels 13 and flows towards the middle impact chamber 31. The narrow cross-section of shear channel 21 forces the material to flow towards the two ends of shear channel 21. The material is homogenized, dispersed, emulsified, and broken down by shear force. Furthermore, the material collides and is homogenized, dispersed, emulsified, and broken down upon encountering and colliding in impact chamber 31. Simultaneously, because shear channel 22 is not connected to branch channel 13, and impact chamber 32 is not connected to low-pressure outlet channel 12, the cooling medium can bypass the flowing material and flow sequentially through cooling channel 16, shear channel 22, impact chamber 32, and cooling channel 17, thereby achieving direct cooling of shear channel 22 and impact chamber 32. Figure 6As shown, when roller 2 rotates to the second position, the two diversion channels 13 are aligned and connected to the two ends of shear channel 22, and cooling channels 16 and 17 are aligned and connected to the two ends of shear channel 21. Simultaneously, switching valve 7 switches to the second position, connecting impact chamber 32 to low-pressure outlet channel 12. Material enters the two ends of shear channel 22 from the two diversion channels 13 and flows towards the middle impact chamber 32. The narrow cross-section of shear channel 22 forces the material to be homogenized, dispersed, emulsified, and broken down by shear force. Furthermore, the material collides and is homogenized, dispersed, emulsified, and broken down in impact chamber 32. Meanwhile, since shear channel 21 is not connected to diversion channels 13, the impact chamber... Channel 13 is not connected to the low-pressure outlet channel 12. The cooling medium can bypass the flowing material and flow sequentially from cooling channel 16, shear channel 21, impact chamber 31, and cooling channel 17, thereby directly cooling shear channel 21 and impact chamber 31. Through the above design, in the microjet interactive cavity and microjet homogenizer provided in this embodiment of the invention, when roller 2 rotates to the first position and switching valve 7 switches to the first position, the material will flow sequentially through the high-pressure inlet channel 11, the diversion channel 13, the shear channel 21, the impact chamber 31, and the low-pressure outlet channel 12. The material is sheared in the shear channel 21 and impacted in the impact chamber 31. These mechanical forces cause the material to... The material is homogenized. Simultaneously, since cooling channels 16 and 17 are aligned and connected to both ends of shear channel 22, the switching valve 7 isolates impact chamber 32 from low-pressure outlet channel 12. This allows the cooling medium to pass through cooling channels 16, 22, 32, and 17, directly cooling the heat-generating shear channel 22 and impact chamber 32. Alternatively, the roller 2 rotates to a second position, and the switching valve 7 switches to the second position. The material then flows sequentially through high-pressure inlet channel 11, diversion channel 13, shear channel 22, impact chamber 32, and low-pressure outlet channel 12, undergoing shearing action in shear channel 22. The impact chamber 32 impacts the material, and these mechanical forces homogenize the material. Simultaneously, since cooling channels 16 and 17 are aligned with and connected to both ends of shear channel 21, and switching valve 7 isolates impact chamber 31 from low-pressure outlet channel 12, the cooling medium can pass through cooling channels 16, shear channel 21, impact chamber 31, and cooling channel 17, directly contacting and cooling the heat-generating shear channel 21 and impact chamber 31. Based on the above design, the rotatable roller 2 on the outer shell 1 cycles between a first and second position, and the switching valve 7 also cycles between the first and second positions, allowing the shear channel 22 and impact chamber 32 to...The shear channel 21 and impact chamber 31 alternately achieve the most effective heat exchange and cooling through direct contact with the cooling medium. Compared with the existing technology that uses cooling outside the micro-jet channels on the outer shell, the cooling effect is faster and better, and the cooling medium and the flowing material will not mix. The shear channel 22 and impact chamber 32, and the shear channel 21 and impact chamber 31, can alternately homogenize the material, thus not significantly affecting the homogenization operation of the material.

[0038] like Figure 5 As shown, when roller 2 rotates to the first position and switching valve 7 switches to the first position, the high-pressure inlet channel 11, the diversion channel 13, the shearing channel 1 21, the impact chamber 1 31, and the low-pressure outlet channel 12 are sequentially connected to form a micro-jet channel. Simultaneously, the cooling channel 1 16, the shearing channel 2 22, the impact chamber 2 32, and the cooling channel 2 17 are sequentially connected to form a cooling channel. It should be noted that at this time, because switching valve 7 closes the connection between the impact chamber 2 32 and the low-pressure outlet channel 12, the cooling medium will not flow into the low-pressure outlet channel 12 when entering the impact chamber 2 32. Figure 6 As shown, when the roller 2 rotates to the second position and the switching valve 7 switches to the second position, the high-pressure inlet channel 11, the diversion channel 13, the second shear channel 22, the second impact chamber 32, and the low-pressure outlet channel 12 are sequentially connected to form a micro-jet channel. At the same time, the first cooling channel 16, the first shear channel 21, the first impact chamber 31, and the second cooling channel 17 are sequentially connected to form a cooling channel. It should be noted that at this time, because the switching valve 7 closes the connection between the first impact chamber 31 and the low-pressure outlet channel 12, the cooling medium will not flow to the low-pressure outlet channel 12 when it enters the first impact chamber 31.

[0039] like Figure 7 As shown, in some embodiments, the roller body 2 has a cylindrical structure, and an installation cavity 5 is provided on the outer shell 1 between the high pressure inlet channel 11 and the low pressure outlet channel 12. The shape of the installation cavity 5 is adapted to the shape of the roller body 2, and the outer peripheral wall of the roller body 2 is sealed to the peripheral side wall of the installation cavity 5, so that the fluid in the shear channel 21 and the shear channel 22 will not leak from the outer peripheral wall of the roller body 2.

[0040] like Figure 7 As shown, in some embodiments, shear channel one 21 and shear channel two 22 are alternately arranged on the roller body 2 along the circumference of the roller body 2, so that when the roller body 2 rotates circumferentially, shear channel one 21 and shear channel two 22 can be alternately aligned and connected to the diversion channel 13.

[0041] In some embodiments, one or more shear channels 21 are uniformly and spaced along the circumference of the roller body 2, and one or more shear channels 22 are uniformly and spaced along the circumference of the roller body 2. The impact ring 3 is provided with the same number of impact chambers 31 as the shear channels 21, and the impact ring 3 is provided with the same number of impact chambers 32 as the shear channels 22. Specifically, in this embodiment, three shear channels 21 are uniformly and spaced along the circumference of the roller body 2, and three shear channels 22 are uniformly and spaced along the circumference of the roller body 2. There are three impact rings: the impact ring 3 has three impact chambers 31, the same number as the shear channel 21, and the impact ring 3 has three impact chambers 32, the same number as the shear channel 22. It is understood that in some other embodiments not shown in the figures, the shear channel 21 is uniformly and spaced apart along the circumference of the roller body 2, with one, two, four or more shear channels 22 having the same number as the shear channel 21 on the roller body 2, the impact ring 3 having the same number of impact chambers 31 as the shear channel 21, and the impact ring 3 having the same number of impact chambers 32 as the shear channel 22.

[0042] like Figure 10 As shown, in some embodiments, the outer shell 1 is further provided with two guide channels 15 located at both ends of the roller body 2, and the two guide channels 15 are respectively connected to two diversion channels 13. The guide channels 15 are arranged in a circular array around the axis of the roller body 2. The shape of the guide channels 15 corresponds to the distribution structure of shear channel one 21 or shear channel two 22 on the roller body 2, so that by rotating the roller body 2, one or more shear channels one 21 / shear channel two 22 can be positioned relative to the guide channels 15, so that the material in the diversion channel 13 can be simultaneously input into one or more shear channels one 21 / shear channel two 22; as Figure 10 As shown, specifically in this embodiment, the flow channel 15 has a Y-shaped structure, so that the flow channel 15 can simultaneously supply material to the three shear channels 1 21 or shear channels 22.

[0043] In some embodiments, the cross-section of shear channel 1 21 / shear channel 22 is smaller than the cross-section of diversion channel 13 and guide channel 15, so as to generate shear force on the material by reducing the flow cross-section from diversion channel 13 to shear channel 1 21 / shear channel 22, thereby achieving the dispersion effect on the material.

[0044] like Figure 11 , Figure 12 as well as Figure 13As shown, in some embodiments, three cooling channels 16 are evenly distributed around the axis of the roller body 2, and three cooling channels 27 are evenly distributed around the axis of the roller body 2. Thus, cooling medium can be simultaneously input into three shear channels 21 or shear channels 22 through the three cooling channels 16, and cooling medium can be simultaneously drawn out from the three shear channels 21 or shear channels 22 through the three cooling channels 27.

[0045] like Figure 5 , Figure 6 As shown, in some embodiments, a cooling interface 18 communicating with the cooling channel 16 is provided on the outer side wall of the outer casing 1 and near the cooling channel 17, and a cooling interface 19 communicating with the cooling channel 17 is provided on the outer side wall of the outer casing 1 and near the cooling channel 17. The cooling interface 18 is used to connect the cooling medium, and the cooling interface 19 is used to return the cooling medium so that the cooling medium can be drawn out, cooled, and then recycled from the cooling interface 18.

[0046] like Figure 9 As shown, in some embodiments, the impact ring 3 is fixedly connected to the roller body 2. The outer peripheral wall of the impact ring 3 is provided with annular groove 33 and annular groove 34. Annular groove 33 and annular groove 34 extend circumferentially around the impact ring 3, and are spaced apart axially along the impact ring 3. Annular groove 33 and impact cavity 31 are connected through a connecting hole 35, and annular groove 34 and impact cavity 32 are connected through a connecting hole 35. The outer peripheral wall of the impact ring 3 is sealed to the outer shell 1 so that annular groove 33 and annular groove 34 are not connected. Figure 5 and Figure 6 As shown, the outer casing 1 is also provided with a valve port 8 and a valve port 9 spaced apart. Valve port 8 connects to the switching valve 7 and the annular groove 33, and valve port 9 connects to the switching valve 7 and the annular groove 34. Thus, the material in the impact chamber 31 passes through the annular groove 33 and then through valve port 8 into the switching valve 7, and the material in the impact chamber 32 passes through the annular groove 34 and then through valve port 9 into the switching valve 7. When the switching valve 7 is switched to the first position, valve port 8 connects to the low-pressure outlet channel 12, thus connecting the impact chamber 31 and the low-pressure outlet channel 12. When the switching valve 7 is switched to the second position, valve port 9 connects to the low-pressure outlet channel 12, thus connecting the impact chamber 32 and the low-pressure outlet channel 12. Specifically, in this embodiment, the connecting hole 35 extends radially along the impact ring 3.

[0047] like Figure 4 As shown, in some embodiments, a second mounting cavity 6 is recessed on the outer shell 1 and on the peripheral sidewall of the first mounting cavity 5, the shape of the second mounting cavity 6 being adapted to the shape of the impact ring 3.

[0048] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments, one end of the mounting cavity 5 is open, and an end limiting block 101 is installed on the outer shell 1 at the opening position of the mounting cavity 5 to axially limit the roller body 2 in the mounting cavity 5 by means of the end limiting block 101. Specifically, in this embodiment, the cooling flow channel 16, the cooling interface 18, one of the guide channels 15 and part of the diversion channel 13 are located on the end limiting block 101.

[0049] like Figure 5 As shown, in some embodiments, at least one end of the roller body 2 is equipped with a rotating shaft 4, and the roller body 2 is rotatably engaged with the housing 1 through the rotating shaft 4. The rotating shaft 4 extends to the outside of the housing 1, so that the roller body 2 can be controlled to make a set movement by electrically or hydraulically controlling the rotation of the rotating shaft 4, so as to coordinate the regulation of the roller body 2 and the switching valve 7.

[0050] In some embodiments, the roller 2 may rotate in the same direction to switch between the first position and the second position, or the roller 2 may rotate alternately in opposite directions to switch between the first position and the second position.

[0051] In some embodiments, the switching valve 7 is a two-position three-way valve. Specifically, in this embodiment, the switching valve 7 is a two-position three-way solenoid valve.

[0052] In some embodiments, the outer shell 1, roller 2, and impact ring 3 are made of ceramic, diamond, or other high-hardness materials.

[0053] The present invention also provides a homogenizer for preparing conductive paste, which includes the microfluidic interactive cavity provided in any of the above embodiments.

[0054] In some embodiments, the microjet homogenizer also includes a pump (not shown) that drives the material through the microjet interaction chamber. Specifically, the high-pressure inlet channel 11 is connected to the pump outlet, thereby pressurizing the material into a high-pressure state and pumping it into the high-pressure inlet channel 11 under the drive of the pump. The material eventually flows out from the low-pressure outlet channel 12 and is homogenized, dispersed, emulsified and broken down.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microjets interactive cavity, characterized in that: The system includes a housing, a roller, an impact ring, and a switching valve. The housing has a high-pressure inlet channel and a low-pressure outlet channel. The roller is rotatably fitted onto the housing, and the axis of the roller is perpendicular to the axis of the housing. Shear channels one and two, spaced apart, are provided on the peripheral sidewall of the roller and extending axially along the roller. The impact ring is fitted onto the peripheral sidewall of the roller. Impact chamber one and impact chamber two, spaced apart circumferentially along the inner peripheral wall of the impact ring, are provided. Impact chamber one is aligned with and communicates with shear channel two, and impact chamber two is aligned with and communicates with shear channel two. The two flow channels extend to both ends of the roller. The end of the high-pressure inlet channel branches out to form two flow channels, which extend close to both ends of the roller. The shell is also provided with a spaced-apart cooling channel one and a cooling channel two, which are located near the two ends of the roller body. A switching valve is installed on the shell and near the low-pressure outlet channel. When the roller body rotates to the first position, the two branch channels are aligned with and connected to the two ends of the shear channel one, and the cooling channels one and two are aligned with and connected to the two ends of the shear channel two. At the same time, the switching valve is switched to the first position, that is, the impact chamber one is connected to the low-pressure outlet channel. When the roller body rotates to the second position, the two branch channels are aligned with and connected to the two ends of the shear channel two, and the cooling channels one and two are aligned with and connected to the two ends of the shear channel one. At the same time, the switching valve is switched to the second position, that is, the impact chamber two is connected to the low-pressure outlet channel.

2. The microjets interactive cavity according to claim 1, characterized in that: The roller body has a cylindrical structure, and an installation cavity is provided on the outer shell between the high-pressure inlet channel and the low-pressure outlet channel. The shape of the installation cavity is adapted to the shape of the roller body, and the outer peripheral wall of the roller body is sealed to the peripheral side wall of the installation cavity.

3. The microjets interactive cavity according to claim 1, characterized in that: The shearing channel one and shearing channel two are arranged alternately along the circumference of the roller body.

4. The microjets interactive cavity according to claim 3, characterized in that: The shearing channel one is provided with one or more uniformly spaced along the circumference of the roller body, and the corresponding shearing channel two is provided with one or more uniformly spaced along the circumference of the roller body. The impact ring is provided with the same number of impact chambers one as the shearing channel one, and the impact ring is provided with the same number of impact chambers two as the shearing channel two.

5. The microjets interactive cavity according to claim 1, characterized in that: The outer shell is also provided with two flow guide channels located at both ends of the roller body, and the two flow guide channels are respectively connected to two flow split channels. The flow guide channels are arranged in a circular array around the axis of the roller body, and the shape of the flow guide channels corresponds to the distribution structure of shear channel one or shear channel two on the roller body.

6. The microjets interactive cavity according to claim 1, characterized in that: The outer peripheral wall of the impact ring is provided with annular groove one and annular groove two. Annular groove one and annular groove two extend around the circumference of the impact ring and are spaced apart along the axial direction of the impact ring. Annular groove one and impact cavity one are connected through a connecting hole, and annular groove two and impact cavity two are connected through a connecting hole. The outer peripheral wall of the impact ring is sealed to the outer shell. The outer shell is also provided with valve port one and valve port two spaced apart. Valve port one is connected between the switching valve and annular groove one, and valve port two is connected between the switching valve and annular groove two.

7. The microjets interactive cavity according to claim 2, characterized in that: One end of the mounting cavity is open, and an end limiting block is installed on the outer shell at the opening position of the mounting cavity.

8. The microjets interactive cavity according to claim 1, characterized in that: At least one end of the roller is equipped with a rotating shaft, and the roller is rotatably engaged with the outer casing via the rotating shaft.

9. The microjets interactive cavity according to claim 1, characterized in that: The switching valve is a two-position three-way valve.

10. A homogenizer for preparing conductive paste, characterized in that: The homogenizer for preparing conductive paste includes the microfluidic interactive cavity as described in any one of claims 1 to 9.

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