Stator-rotor assembly with material conveying function and pulping system

Abstract

This invention relates to a stator-rotor assembly with material conveying function and a pulping system. A stator-rotor assembly with material conveying function includes multiple stator groups, with adjacent groups arranged symmetrically. Each stator group includes a first stator and a second stator stacked on top of each other. The side walls of both the first and second stators are sloped. A bushing is installed at the middle of both the first and second stators, with a clearance fit between the bushing and the first and second stators. For each stator group, an installation space is formed between the first and second stators, within which a rotor is installed. Flow grooves are formed on the end faces of the rotor, the first stator, and the second stator. By configuring the stator-rotor assembly, the flow resistance of the pulp inside the pulping system can be reduced, facilitating pulp flow and thus improving its dispensing efficiency. Simultaneously, it reduces wear on the stator-rotor assembly from the pulp, extending its service life.

Description

Technical Field

[0001] This invention relates to the field of pulping equipment technology, and in particular to a stator-rotor assembly with material conveying function and a pulping system. Background Technology

[0002] The positive and negative electrode sheets in lithium-ion batteries are mostly made from solid-liquid mixtures, and the uniformity of the slurry has a significant impact on the quality of the electrode sheets. Lithium-ion battery slurries are mostly prepared by a slurry preparation system. The slurry preparation system mixes and dissolves powdered and liquid raw materials, and then uses a stator and rotor assembly to stir, disperse, and shear the mixture to complete the preparation of the slurry.

[0003] In the prior art, the stator and rotor assemblies installed in the pulping system are mostly disc-type or cylindrical. The distance between the stator and rotor is too small, which generates great resistance to the pulp in the pulping system, making it difficult for the pulp to flow, thereby reducing the dispersion efficiency of the stator and rotor assemblies. At the same time, the pulp causes severe wear on the stator and rotor assemblies, reducing the service life of related parts. Summary of the Invention

[0004] To address the shortcomings of the existing production technology, the applicant provides a stator-rotor assembly and pulping system with a reasonable structure and material conveying function. By setting the stator-rotor assembly with sloping sidewalls, the flow resistance of the pulp inside the pulping system can be reduced, facilitating pulp flow and thus improving its dispersion efficiency. At the same time, it can reduce the wear of the pulp on the stator-rotor assembly and extend its service life.

[0005] The technical solution adopted in this invention is as follows:

[0006] A stator-rotor assembly with material conveying function includes an array of stator groups, with adjacent stator groups arranged symmetrically. Each stator group includes a first stator and a second stator stacked on top of each other. The side walls of the first stator and the second stator are both sloped, so that the outer diameter of the first stator increases from the small end to the large end, and the outer diameter of the second stator also increases from the small end to the large end. A bushing is installed in the middle of the first stator and the second stator, with the bushing having a clearance fit with the first stator and the bushing having a clearance fit with the second stator.

[0007] For a single stator group, an installation space is formed between the first stator and the second stator, and a rotor is installed in the installation space. The shape of the rotor corresponds to that of the first stator and the second stator, and flow grooves are formed on the end faces of the rotor, the first stator and the second stator.

[0008] A single rotor is fixed to the outer wall of the bushing, thereby driving the rotor to rotate relative to the first stator and the second stator through the bushing.

[0009] As a further improvement to the above technical solution:

[0010] The structure of the first stator is as follows: it includes a first thin plate portion, a first through hole is opened in the middle of the first thin plate portion, a first ring plate portion is provided on the first through hole, and the first ring plate portion protrudes outward toward the first through hole, so that the side wall surface of the first stator is all sloped.

[0011] The structure of the second stator is as follows: it includes a second thin plate portion, which corresponds to the shape of the first thin plate portion and has the same size. A second through hole is provided in the middle of the second thin plate portion, and a second ring plate portion protruding outward is provided on the second through hole.

[0012] The diameter of the second through hole is smaller than the diameter of the first through hole, thereby forming the mounting space between the first thin plate portion, the second thin plate portion, the second annular plate portion, and the first annular plate portion.

[0013] The sidewalls of the rotor are all sloped.

[0014] The flow passage adopts a flow hole structure or a flow groove structure.

[0015] The flow channels are arranged either concentrically or eccentrically.

[0016] The flow channel can be either vertically penetrating or inclinedly penetrating.

[0017] A pulping system utilizing a stator-rotor assembly with material conveying function as described above includes a connecting shaft that is fitted with a bushing. The connecting shaft is connected to the output end of an external drive device. The connecting shaft passes through both a mixing chamber and a dispersion chamber. The mixing chamber and the dispersion chamber are stacked sequentially from top to bottom. The stator-rotor assembly is installed inside the dispersion chamber.

[0018] A mixing inlet is provided on the top wall of the mixing chamber, and a mixing outlet is provided on the side wall of the mixing chamber. An impeller is installed inside the mixing chamber and the impeller is fixed to the outer circumferential surface of the connecting shaft.

[0019] A dispersion inlet is provided on the side wall of the dispersion chamber;

[0020] The external drive device drives the connecting shaft to rotate, and the connecting shaft drives the rotor in the stator-rotor assembly to rotate, thereby preparing the slurry and causing the slurry in the dispersion chamber to flow toward the mixing chamber;

[0021] At the same time, the connecting shaft drives the impeller to rotate, thereby lifting the slurry in the dispersion chamber into the mixing chamber, and then discharging it through the mixing outlet.

[0022] As a further improvement to the above technical solution:

[0023] The shaft head of the connecting shaft extends into the mixing inlet, and a dispersing head is fixedly installed on the shaft head.

[0024] A first through hole is formed on the bottom wall of the mixing chamber, and a second through hole is formed on the top wall of the dispersion chamber. The second through hole and the first through hole are arranged coaxially, thereby enabling the internal space of the mixing chamber to communicate with the internal space of the dispersion chamber.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention has a compact and reasonable structure and is easy to operate. By setting the stator and rotor assembly, its inclined structure can improve the stator and rotor assembly's ability to transport slurry, thereby reducing the flow resistance of slurry inside the pulping system, improving dispersion efficiency, reducing the wear of slurry on the stator and rotor assembly, and extending the service life of related parts.

[0027] The present invention also includes the following advantages:

[0028] (1) In this invention, the first stator, the second stator and the rotor are all bowl-shaped and have inclined end faces, thereby enabling the stator and rotor assembly to have slurry conveying capability, to convey slurry in a directional manner, and to improve the flow field of slurry inside the slurry system according to the slurry making requirements, so as to improve the slurry quality.

[0029] (2) In this invention, by making the outer diameter of the large end of the rotor smaller than the diameter of the first through hole, and the inner diameter of the large end larger than the diameter of the second through hole, the rotor can be fitted with the first stator and the second stator respectively with a clearance, so as to prevent the first stator and the second stator from interfering with the rotational motion of the rotor.

[0030] (3) In this invention, by symmetrically arranging two adjacent stator groups, the distance between the stator and rotor components is increased, the dispersion gap is expanded, and the slurry flow is facilitated, thereby reducing the slurry flow resistance.

[0031] (4) The structure and arrangement of the flow channel in this invention are diverse, which can further enhance the fluidity of the slurry and can be applied to slurries of different viscosities. It can effectively improve the effect of the slurry mixing, dispersing and shearing of the slurry by the slurry preparation system and has high flexibility of use.

[0032] (5) By setting an impeller and a stator ring, the slurry can be further sheared and dispersed when it is discharged, thus ensuring the quality of the slurry.

[0033] (6) In this invention, the mixing outlet and the dispersion inlet are connected by a connecting pipe assembly, so that the slurry in the pulping system can be sheared and dispersed multiple times, thereby realizing cyclic pulping and further improving the quality of the slurry. Attached Figure Description

[0034] Figure 1This is a schematic diagram of the pulping system in this invention.

[0035] Figure 2 This is a schematic diagram of the stator and rotor assembly in this invention.

[0036] Figure 3 This is a full sectional view of the stator and rotor assembly in this invention.

[0037] Figure 4 for Figure 2 The main view.

[0038] Figure 5 This is a schematic diagram of the rotor structure in this invention.

[0039] Figure 6 This is a schematic diagram of the structure of the first stator in this invention.

[0040] Figure 7 for Figure 6 A bottom view.

[0041] Figure 8 This is a schematic diagram of the structure of the second stator in this invention.

[0042] Figure 9 for Figure 8 A bottom view.

[0043] The components are: 1. Mixing chamber; 2. Dispersion chamber; 3. Connecting shaft; 4. Sealing ring; 5. First stator; 6. Second stator; 7. Impeller; 8. Dispersing head; 9. Rotor; 10. Stator ring; 11. Flow groove; 12. Shaft sleeve;

[0044] 101. Mixing inlet; 102. Mixing outlet; 103. First through hole;

[0045] 201. Dispersion feed inlet; 202. Second through hole; 203. Limiting ring;

[0046] 501. First thin plate section; 502. First annular plate section;

[0047] 601. Second thin plate section; 602. Second ring plate section. Detailed Implementation

[0048] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0049] Example 1:

[0050] like Figures 1-9As shown, the stator-rotor assembly with material conveying function in this embodiment includes an array of stator groups, with adjacent stator groups arranged symmetrically. Each stator group includes a first stator 5 and a second stator 6 stacked on top of each other. The side walls of the first stator 5 and the second stator 6 are both sloped, so that the outer diameter of the first stator 5 increases from the small end to the large end, and the outer diameter of the second stator 6 also increases from the small end to the large end. A bushing 12 is installed in the middle of the first stator 5 and the second stator 6, with a clearance fit between the bushing 12 and the first stator 5, and a clearance fit between the bushing 12 and the second stator 6. For a single stator group, an installation space is formed between the first stator 5 and the second stator 6, and a rotor 9 is installed in the installation space. The shape of the rotor 9 corresponds to that of the first stator 5 and the second stator 6. A flow groove 11 is opened on the end face of the rotor 9, the first stator 5 and the second stator 6. A single rotor 9 is fixed on the outer wall of the bushing 12, so that the bushing 12 drives the rotor 9 to rotate relative to the first stator 5 and the second stator 6. The stator and rotor assembly of this embodiment includes a first stator 5, a second stator 6, and a rotor 9, all of which have inclined end faces, i.e., all are bowl-shaped, thereby enabling the stator and rotor assembly to have slurry conveying capability, to directionally convey slurry, and to improve the flow field of slurry inside the slurry system according to slurry preparation requirements, so as to improve slurry quality.

[0051] like Figures 6-7 As shown, the structure of the first stator 5 is as follows: it includes a first thin plate portion 501, a first through hole in the middle of the first thin plate portion 501, and a first annular plate portion 502 disposed on the first through hole. The first annular plate portion 502 protrudes outward toward the outside of the first through hole, thereby making the sidewalls of the first stator 5 all sloped. In this embodiment, the first thin plate portion 501 is a circular thin plate, and the first annular plate portion 502 is a conical annular plate that protrudes outward toward the outside of the first through hole, and its outer sidewall forms an inclined end face;

[0052] The outer diameter of the large end of the first ring plate portion 502 is equal to the diameter of the first through hole, so that the first ring plate portion 501 and the second ring plate portion 502 are integral structures.

[0053] The inner diameter of the small end of the first ring plate portion 502 is larger than the outer diameter of the bushing 12, thereby making the first stator 5 and the bushing 12 form a clearance fit.

[0054] like Figures 8-9As shown, the structure of the second stator 6 is as follows: it includes a second thin plate portion 601, which corresponds to the shape and has the same size as the first thin plate portion 501. A second through hole is provided in the middle of the second thin plate portion 601, and a second ring plate portion 602 protruding outward is provided on the second through hole. In this embodiment, the second thin plate portion 601 is in the shape of a circular thin plate, and the end face diameter of the second thin plate portion 601 is equal to the end face diameter of the first thin plate portion 501. The second ring plate portion 602 is also a conical ring plate, which protrudes outward from the second through hole, and its outer side wall forms an inclined end face. The outer diameter of the large end of the second ring plate portion 602 is equal to the inner diameter of the second through hole, so that the second thin plate portion 601 and the second ring plate portion 602 can form an integral structure.

[0055] The inner diameter of the small end of the second ring plate 602 is larger than the outer diameter of the bushing 12, thereby making the second stator 6 and the bushing 12 form a clearance fit.

[0056] When the first stator 5 and the second stator 6 are concentrically mounted in a stacked manner, the first thin plate portion 501 and the second thin plate portion 601 are in close contact. The diameter of the second through hole is smaller than the diameter of the first through hole, which makes the radial length of the end face of the second thin plate portion 601 longer than the radial length of the end face of the first thin plate portion 501. This creates an installation space between the first thin plate portion 501, the second thin plate portion 601, the second ring plate portion 602, and the first ring plate portion 502 for mounting the rotor 9.

[0057] like Figure 5 As shown, the rotor 9 is made by machining a tapered ring plate, so that the side wall of the rotor 9 is sloping, which corresponds to the shape of the first stator 5 and the second stator 6, so that it can be installed between the first stator 5 and the second stator 6.

[0058] The outer diameter of the large end of the rotor 9 is smaller than the diameter of the first through hole, while the inner diameter of the large end is larger than the diameter of the second through hole. This allows the rotor 9 to be in clearance fit with the first stator 5 and the second stator 6, preventing the first stator 5 and the second stator 6 from interfering with the rotational motion of the rotor 9.

[0059] In this embodiment, the rotor 9 is fixed to the outer circumferential surface of the bushing 12 by welding. Several rotors 9 can be fixed on the bushing 12. The bushing 12 has a central hole in the middle for installation with the connecting shaft 3.

[0060] In this embodiment, by symmetrically arranging two adjacent stator groups, the distance between the stator and rotor assemblies is increased, the dispersion gap is expanded, which facilitates slurry flow and reduces slurry flow resistance.

[0061] In this embodiment, the overflow groove 11 is used to further enhance the fluidity of the slurry. Its structure and arrangement are diverse, and it can be applied to slurries of different viscosities. It effectively improves the effect of the pulping system in stirring, mixing, dispersing and shearing the slurry, and has high flexibility in use.

[0062] The flow slots 11 are respectively arranged on the end faces of the first ring plate 502, the second ring plate 602 and the rotor 9. The multiple flow slots 11 on the conical ring plate are evenly arranged along the circumferential direction.

[0063] The flow passage 11 can adopt a flow hole structure or a flow groove structure. The shape of the flow hole structure or the flow groove structure can be a regular oval, circle, rectangle, or other shapes, or it can be set as an irregular shape.

[0064] like Figures 1-9 As shown, the flow channels 11 are arranged concentrically, that is, the length direction of a single flow channel 11 is parallel to the radial direction of the conical ring plate; or, the flow channels 11 can also be arranged eccentrically, that is, the length direction of a single flow channel 11 is deflected at a certain angle relative to the radial direction of the conical ring plate.

[0065] like Figures 1-9 As shown, the flow channel 11 adopts a vertical through-hole type, that is, the flow channel 11 vertically penetrates the end face of the conical ring plate; or, the flow channel 11 adopts an inclined through-hole type, that is, the flow channel 11 inclinedly penetrates the end face of the conical ring plate.

[0066] In this embodiment, the stator and rotor assembly, by setting the first stator 5, the second stator 6, and the rotor 9 with sloping sidewalls, can improve the flow field of the slurry inside the pulping system and enhance the flow performance of the slurry. The symmetrical arrangement of multiple stator and rotor assemblies increases the spacing between the stator and rotor assemblies, effectively reducing the slurry flow resistance, thereby improving the dispersion efficiency and dispersion quality, and reducing the wear of the slurry on related components.

[0067] Example 2:

[0068] like Figure 1 As shown, using a stator and rotor assembly with material conveying function provided in Embodiment 1, this embodiment provides a pulping system, including a connecting shaft 3 that is installed in conjunction with the bushing 12. The connecting shaft 3 is connected to the output end of an external drive device. The connecting shaft 3 passes through both the mixing chamber 1 and the dispersion chamber 2. The connecting shaft 3 is installed in conjunction with the bottom wall of the dispersion chamber 2 through a sealing ring 4, thereby preventing material leakage in the dispersion chamber 2.

[0069] The mixing chamber 1 and the dispersion chamber 2 are stacked and installed from top to bottom. A first through hole 103 is opened on the bottom wall of the mixing chamber 1, and a second through hole 202 is opened on the top wall of the dispersion chamber 2. The second through hole 202 is arranged coaxially with the first through hole 103, so that the internal space of the mixing chamber 1 and the internal space of the dispersion chamber 2 are connected.

[0070] A mixing inlet 101 is provided on the top wall of the mixing chamber 1 for feeding powder; a mixing outlet 102 is provided on the side wall of the mixing chamber 1 for discharging slurry; the shaft head of the connecting shaft 3 extends into the mixing inlet 101, and a dispersing head 8 is fixedly installed on the shaft head, which enables the powder to fall evenly into the mixing chamber 1 and the dispersion chamber 2.

[0071] An impeller 7 is installed inside the mixing chamber 1. The impeller 7 is fixed on the outer circumferential surface of the connecting shaft 3. A stator ring 10 is also installed inside the mixing chamber 1. The impeller 7 is located in the middle of the stator ring 10. The stator ring 10 and the impeller 7 cooperate to further shear and disperse the slurry when it is discharged, so as to ensure the quality of the slurry.

[0072] A dispersion inlet 201 is provided on the side wall of the dispersion chamber 2 for feeding liquid materials; the stator and rotor assembly is installed in the dispersion chamber 2 and can mix and disperse liquid materials and powder materials.

[0073] The stator and rotor assembly is installed inside the dispersion cavity 2 via a limiting ring 203. In this embodiment, two rotors 9 are fixed on the bushing 12, and two sets of stator groups are arranged. The installation steps for installing the stator and rotor assembly inside the dispersion cavity 2 are as follows:

[0074] Prepare two limit rings 203;

[0075] First, a limiting ring 203 is fixed to the inner wall of the dispersion cavity 2 by welding. Then, a second stator 6 is placed on the limiting ring 203 and the second stator 6 is placed upright. The limiting ring 203 restricts the displacement of the second stator 6 along the axial direction of the connecting shaft 3.

[0076] Next, a rotor 9 is welded to a bushing 12, and the bushing 12 is fitted onto the connecting shaft 3, so that the bushing 12 and the rotor 9 are installed in the dispersion cavity 2 at the same time, ensuring that there is a gap between the rotor 9 and the second stator 6 that has been placed in the dispersion cavity 2. Then, a first stator 5 is placed on the rotor 9, so that the end face of the first thin plate portion 501 of the first stator 5 is in close contact with the end face of the second thin plate portion 601 of the second stator 6 that has been placed in the dispersion cavity 2.

[0077] Then, another limiting ring 203 is fixed to the inner wall of the dispersion cavity 2 by welding. Then, another first stator 5 is placed on the limiting ring 203 and the first stator 5 is placed upside down to ensure that the two sets of stator and rotor assemblies can be arranged symmetrically.

[0078] Finally, another rotor 9 is placed inside the dispersion cavity 2, above the first stator 5, and welded to the bushing 12. During welding, a gap is left between the rotor 9 and the first stator 5 below it. Then, another second stator 6 is placed on the rotor 9, and the end face of the second thin plate portion 601 of the second stator 6 is made to fit and contact with the end face of the first thin plate portion 501 of the corresponding first stator 5, thereby completing the installation.

[0079] In this embodiment, a connecting pipe assembly can be set up to connect the mixing outlet 102 and the dispersing inlet 201, so that the slurry flowing out of the mixing outlet 102 flows back into the dispersing chamber 2, and after being dispersed and sheared again by the stator and rotor assembly, it enters the mixing chamber 1 again under the action of the impeller 7, and is discharged through the mixing outlet 102, thereby performing cyclic slurry making and further improving the slurry quality.

[0080] The pulping system in this embodiment operates as follows:

[0081] During feeding, the mixing outlet 102 is closed, the powder is fed through the mixing inlet 101, and the liquid is fed through the dispersing inlet 201.

[0082] The external drive device uses an electric motor. When the motor is started, the motor drives the connecting shaft 3 to rotate, and the connecting shaft 3 drives the dispersing head 8 to rotate, thereby ensuring that the powder can be fed evenly during feeding.

[0083] The connecting shaft 3 drives the rotor 9 in the stator-rotor assembly to rotate, mixing and dispersing the powder and liquid materials in the pulping system to prepare slurry, and causing the slurry in the dispersion chamber 2 to flow toward the mixing chamber 1;

[0084] At the same time, the connecting shaft 3 drives the impeller 7 to rotate, thereby lifting the slurry in the dispersion chamber 2 into the mixing chamber 1, and then discharging it through the mixing outlet 102.

[0085] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A stator-rotor assembly with material conveying function, characterized in that: The system includes arrays of stator groups, with adjacent stator groups arranged symmetrically. Each stator group includes a first stator (5) and a second stator (6) stacked on top of each other. The sidewalls of the first stator (5) and the second stator (6) are both sloped, so that the outer diameter of the first stator (5) increases from the small end to the large end, and the outer diameter of the second stator (6) increases from the small end to the large end. A bushing (12) is installed in the middle of the first stator (5) and the second stator (6). The bushing (12) is in clearance fit with the first stator (5) and the bushing (12) is in clearance fit with the second stator (6). For a single stator group, an installation space is formed between the first stator (5) and the second stator (6), and a rotor (9) is installed in the installation space. The shape of the rotor (9) corresponds to that of the first stator (5) and the second stator (6). A flow groove (11) is opened on the end face of the rotor (9), the first stator (5) and the second stator (6). A single rotor (9) is fixed to the outer wall of the bushing (12), thereby driving the rotor (9) to rotate relative to the first stator (5) and the second stator (6) through the bushing (12).

2. The stator and rotor assembly with material conveying function as described in claim 1, characterized in that: The structure of the first stator (5) is as follows: it includes a first thin plate portion (501), a first through hole is opened in the middle of the first thin plate portion (501), a first ring plate portion (502) is provided on the first through hole, and the first ring plate portion (502) protrudes outward toward the first through hole, so that the side wall surface of the first stator (5) is all sloped.

3. The stator and rotor assembly with material conveying function as described in claim 2, characterized in that: The structure of the second stator (6) is as follows: it includes a second thin plate part (601), the second thin plate part (601) corresponds to the shape of the first thin plate part (501) and has the same size, a second through hole is provided in the middle of the second thin plate part (601), and a second ring plate part (602) protruding outward is provided on the second through hole; The diameter of the second through hole is smaller than the diameter of the first through hole, thereby forming the mounting space between the first thin plate portion (501), the second thin plate portion (601), the second annular plate portion (602), and the first annular plate portion (502).

4. The stator and rotor assembly with material conveying function as described in claim 1, characterized in that: The sidewalls of the rotor (9) are all sloped.

5. The stator and rotor assembly with material conveying function as described in claim 1, characterized in that: The flow passage (11) adopts a flow hole structure or a flow groove structure.

6. The stator and rotor assembly with material conveying function as described in claim 1, characterized in that: The flow channel (11) is arranged in a concentric or eccentric manner.

7. The stator and rotor assembly with material conveying function as described in claim 1, characterized in that: The flow channel (11) is either vertically penetrating or inclinedly penetrating.

8. A pulping system utilizing a stator-rotor assembly with material conveying function as described in claim 1, characterized in that: Includes a connecting shaft (3) that is fitted with a bushing (12), the connecting shaft (3) being connected to the output end of an external drive device, the connecting shaft (3) passing through both a mixing chamber (1) and a dispersing chamber (2), the mixing chamber (1) and the dispersing chamber (2) being stacked from top to bottom, and the stator and rotor assembly being installed inside the dispersing chamber (2); The mixing chamber (1) has a mixing inlet (101) on its top wall and a mixing outlet (102) on its side wall. An impeller (7) is installed inside the mixing chamber (1) and the impeller (7) is fixed to the outer circumferential surface of the connecting shaft (3). A dispersion inlet (201) is provided on the side wall of the dispersion chamber (2); The external drive device drives the connecting shaft (3) to rotate, and the connecting shaft (3) drives the rotor (9) in the stator-rotor assembly to rotate, thereby preparing slurry and causing the slurry in the dispersion chamber (2) to flow toward the mixing chamber (1); At the same time, the connecting shaft (3) drives the impeller (7) to rotate, thereby lifting the slurry in the dispersion chamber (2) into the mixing chamber (1), and then discharging it through the mixing outlet (102).

9. The pulping system as described in claim 8, characterized in that: The shaft head of the connecting shaft (3) extends into the mixing inlet (101), and a dispersing head (8) is fixedly installed on the shaft head.

10. The pulping system as described in claim 8, characterized in that: A first through hole (103) is provided on the bottom wall of the mixing chamber (1), and a second through hole (202) is provided on the top wall of the dispersion chamber (2). The second through hole (202) and the first through hole (103) are arranged coaxially, so that the internal space of the mixing chamber (1) and the internal space of the dispersion chamber (2) are connected.

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