Multi-kettle system for continuously providing flash spinning solution

Abstract

The multi-kettle system for continuously providing the flash spinning solution comprises a plurality of mixing kettles, and each mixing kettle comprises a mixing kettle body, a mixing jacket and a mixing driving device; the mixing kettle body further comprises a solvent input structure, a solute input structure, a mixing pressure detection control structure, a mixing temperature detection structure and a mixing liquid level detection structure which are mounted on the mixing kettle body; the transfer kettle comprises a transfer kettle body, a transfer jacket and a transfer driving device; and the lower kettle openings of the plurality of mixing kettles are connected to an inlet of the solution input structure of the transfer kettle in an alternative structure. The multi-kettle system for continuously providing the flash spinning solution is used for stably and continuously providing the flash spinning solution.

Description

Technical Field

[0001] The present invention relates to the field of flash spinning, in particular to a multi-kettle system for continuously providing flash spinning solution. Background Art

[0002] Non-woven fabric, also known as non-woven fabric, is a fabric that does not require spinning and weaving. It is composed of oriented or random fibers. It is made by arranging textile short fibers or filaments in a directional or random manner to form a fiber web structure, and then reinforced by mechanical, thermal bonding or chemical methods.

[0003] Flash spinning, also known as instant spinning, is a special case of dry spinning using a flash spinning solution. It can be used to spin ultra-long fiber filaments and non-woven fabrics, and is therefore a technology and method for producing non-woven fabrics. Non-woven fabrics produced using this method are waterproof, moisture-proof, breathable, flexible, lightweight, non-combustible, easily decomposable, non-toxic, odorless, non-irritating, colorful, and recyclable. They are internationally recognized as environmentally friendly products and a new generation of environmentally friendly materials that protect the Earth's ecology. Due to the varying lengths and thicknesses (i.e., densities) of the fibers within, flash-spun non-woven fabrics can be produced with varying thickness, feel, and hardness by varying the processing equipment and raw materials. These products are suitable for use in various applications, including industrial (automotive interiors), chemical (printing substrates), healthcare (surgical gowns, protective clothing, disinfectant wraps, masks, diapers), apparel (shoemaking, leather), household (wallpaper, furniture fabrics, decorative materials, mattresses), and agriculture (reflective film).

[0004] For more information about existing flash spinning methods, as well as related systems, equipment, and methods for flash spinning to produce non-woven fabrics, please refer to Chinese invention patent applications such as CN115595675A, CN115852592A, and CN115976665A. Summary of the Invention

[0005] The problem solved by the present invention is to provide a multi-kettle system for continuously providing flash spinning solution, so as to realize a stable and continuous flash spinning solution providing scheme for the production and manufacturing of the flash spinning process.

[0006] To solve the above problems, the multi-kettle system for continuously providing flash spinning solution of the present invention comprises:

[0007] Multiple mixing kettles, each comprising a mixing kettle body, a mixing jacket, and a mixing drive device; the mixing kettle body having an upper kettle opening and a lower kettle opening; the mixing jacket being used to control the temperature of the mixing kettle body; the mixing drive device being used to provide hybrid power to the solute and solvent in the mixing kettle body; the mixing kettle also comprising a solvent input structure, a solute input structure, a mixing pressure detection and control structure, a mixing temperature detection structure, and a mixing liquid level detection structure installed in the mixing kettle body;

[0008] A transfer kettle, comprising a transfer kettle body, a transfer jacket, and a transfer drive device; the transfer kettle has an upper opening and a lower opening; the transfer jacket is used to control the temperature of the transfer kettle body; the transfer drive device is used to provide balance and transfer power for the solution inside the transfer kettle body; the transfer kettle also includes a solution input structure, a transfer pressure detection and control structure, a transfer temperature detection structure, and a transfer liquid level detection structure installed in the transfer kettle body;

[0009] The lower kettle ports of the multiple mixing kettles are all connected to the inlet of the solution input structure of the transfer kettle through a selective structure.

[0010] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0011] The present invention provides a multi-kettle system for continuously providing and transferring flash spinning solution, which is used to continuously provide flash spinning solution to ensure that production is not interrupted and achieve stable mass production. A multi-mixing kettle parallel structure and a mixing kettle and transfer kettle cascade structure are adopted, and the physical and chemical properties of the flash spinning solution that need to be considered in the kettle body design are comprehensively considered. The system adopts basically the same main design elements of the kettle body, and multiple mixing kettles are designed to be connected to the transfer kettle through a selective connection structure. This system not only facilitates design redundancy and ease of use, achieving a continuous and stable supply of flash spinning solution, but also facilitates the addition, maintenance, and replacement of each kettle body, ensuring the stability of the solution components, improving production efficiency, saving solution, reducing costs, and ensuring the quality stability of the final product and the continuous production requirements.

[0012] For more information about the solutions, structures, methods, properties and advantages of the present invention, please refer to the subsequent contents of this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a first cross-sectional structure of a mixing kettle provided in one embodiment of the present invention; Figure 2 for Figure 1 A second cross-sectional structural schematic diagram of the mixing kettle shown; Figure 3 yes Figure 1 An enlarged schematic diagram of a portion of the structure of the mixing kettle shown; Figure 4 1 is a front view schematic diagram of a solute outlet provided by one embodiment of the present invention; Figure 5 is a bottom view schematic diagram of a solute outlet and corresponding structure provided by another embodiment of the present invention; Figure 6 is a schematic diagram of a hybrid rotating shaft and corresponding blades provided by another embodiment of the present invention; Figure 7 1 is a schematic diagram of a first cross-sectional structure of a transfer kettle provided in one embodiment of the present invention; Figure 8 for Figure 7 A second cross-sectional structural schematic diagram of the transfer kettle is shown; Figure 9 yes Figure 7An enlarged schematic diagram of a portion of the structure of the transfer kettle is shown; Figure 10 is a schematic top view of an internal temperature control structure provided by another embodiment of the present invention; Figure 11 To have Figure 10 A schematic cross-sectional view of a transfer kettle with an internal temperature control structure is shown; Figure 12 A schematic diagram of a multi-reactor system provided in one embodiment of the present invention; Figure 13 A schematic diagram of a multi-reactor system provided in another embodiment of the present invention; Figure 14 A side schematic diagram of a multi-reactor system provided in another embodiment of the present invention; Figure 15 for Figure 14 Schematic diagram of the top view of the multi-kettle system.

[0014] 100-mixing kettle body; 100a-upper part; 100b-middle part; 100c-lower part; 101-first mounting seat; 102-second mounting seat; 103-third mounting seat; 104-fourth mounting seat; 105-upper kettle edge; 106-lower kettle edge; 107-upper kettle opening; 108-lower kettle opening; 109-longitudinal axis (indicated by dotted line); 110-solvent input structure; 111-solvent outlet; 112-solid pipe structure; 120-solute input structure; 121-vertical part; 122-inclined part; 123-solute outlet; 1231-sub-outlet; 130-mixing pressure detection control structure; 140-mixing temperature liquid detection structure; 150-mixing baffle; 151-baffle fixing structure; 152-mixing temperature liquid detection structure Liquid fixed structure; 200-mixing jacket; 201-heat exchange inlet; 202-heat exchange outlet; 203-temperature test structure; 204-fixed structure; 300-mixing drive device; 301-mixing motor; 302-mixing reducer; 303-mixing frame; 304-mixing head; 305-mixing drive mounting seat; 306-mixing rotating shaft; 307-mixing stirring blade; 308-mixing stirring blade; 309-connecting structure; 400-external bracket; 401-side support structure; 402-longitudinal support structure; 403-pillar; 404-transverse reinforcement structure; 405-base structure; H-dividing line between upper part 100a and middle part 100b (indicated by dotted line); L-middle part 100b and lower part 100c (indicated by a dotted line); D - the distance between the solute outlet 123 and the longitudinal axis 109 (indicated by a dotted line); R - the cross-sectional radius of the mixing kettle body 100 (indicated by a dotted line); T - a hollow arrow, indicating the outward direction of the outlet plane of the solute outlet 123 (obliquely upward toward the longitudinal axis 109); α - the single-bend corner between the vertical portion 121 and the inclined portion 122 of the solute input structure 120; β - the angle between the outlet plane of the solute outlet 123 and the longitudinal axis 109 (indicated by a dotted line); w - the width of the notch when the solute outlet 123 is a notched circular tube structure (indicated by a dotted line); d - the cross-sectional diameter of the mixing rotation shaft 306 (indicated by a dotted line); 500 - the transfer kettle body; 500a - the upper kettle body; 5 00b-middle kettle part; 500c-lower kettle part; 501-first assembly seat; 503-third assembly seat; 504-fourth assembly seat; 505-upper kettle edge; 506-lower kettle edge; 507-upper opening; 508-lower opening; 509-lead assembly seat; 510-solution input structure; 511-solution internal input port; 512-firmware structure; 530-transfer pressure detection control structure; 540-transfer warm liquid detection structure; 550-transfer baffle; 551-blocking fixed structure; 552-transfer warm liquid fixed structure; 600-transfer jacket; 601-external heat inlet; 602-external heat outlet; 603-temperature detection structure; 604-external fixed structure; 700-transfer drive device; 701-transfer motor;702 - transfer reducer; 703 - transfer frame; 704 - transfer head; 705 - transfer drive mounting base; 706 - transfer rotating shaft; 708 - transfer stirring blade; 709 - assembly structure; 710 - gap; 711 - temperature control tube; 712 - upper arm; 713 - screw; 714 - power control line; 715 - lead pipe; h - dividing line between upper kettle part 500a and middle kettle part 500b (indicated by dotted line); l - dividing line between middle kettle part 500b and lower kettle part 500c (indicated by dotted line) m - half the height of the transfer kettle 500 (indicated by a dotted line); f - one-third the height of the transfer kettle 500 (indicated by a dotted line); 800 - external bracket; 900 - mixed output control valve; 901 - first pipeline; 902 - second pipeline; 903 - third pipeline; 904 - fourth pipeline; 910 - electronic four-way ball valve; 920 - electronic three-way ball valve; 930 - transfer input control valve; 940 - transfer output control valve; 905 - branch pipeline; 906 - converging pipeline. DETAILED DESCRIPTION

[0015] Flash spinning is difficult to implement because each step and detail presents numerous challenges that must be overcome. Detailed prior art documentation exists regarding the structure and methods of production equipment for preparing and supplying the flash spinning solution, as well as the structure and methods for continuously supplying the flash spinning solution for spinning.

[0016] An embodiment of the present invention provides a mixing kettle for preparing and supplying a flash spinning solution.

[0017] like Figures 1 to 3 As shown, the mixing kettle (not separately labeled) includes the main structures of the mixing kettle body 100, the mixing jacket 200, and the mixing drive device 300. It should be noted that in the various cross-sectional structural diagrams of the mixing kettle, only the mixing kettle body 100 and the mixing jacket 200 are shown in cross-section (hence the corresponding cross-sectional slashes), while most other structures are shown in non-cross-sectional schematic structures. This treatment is to better illustrate the various structures of the mixing kettle.

[0018] like Figure 3 As shown, the mixing kettle body 100 has an upper kettle opening 107 and a lower kettle opening 108. The upper kettle opening 107 is defined by the corresponding upper kettle edge 105, and the lower kettle opening 108 is defined by the corresponding lower kettle edge 106. Figure 1 and Figure 2The installation of the mixing drive device 300 and the sealing of the entire structure are shown. The design of the lower kettle mouth 108 takes into account the viscosity (thickness), temperature and other characteristics of the solution to ensure the required requirements for solution output, while ensuring accurate measurement and stable delivery of the solution to ensure the continuity and stability of the entire production line. The upper kettle mouth 107 is the largest opening of the mixing kettle body 100 and is used for Figure 1 and Figure 2 The external structures such as the mixing drive device 300 are installed and extend into the mixing kettle body 100. The lower kettle port 108 is used as a solution outlet for further providing the solution to the next process (such as providing it to the subsequent transfer kettle related process).

[0019] Figure 3 The mixing vessel 100 is also shown as comprising an upper portion 100a, a middle portion 100b, and a lower portion 100c. The dividing line between the upper and middle portions 100a and 100b is indicated by a dashed line H, while the dividing line between the middle and lower portions 100b and 100c is indicated by a dashed line L. The upper and lower portions 100a and 100c are essentially symmetrical, spherical cap-like structures, but they have the aforementioned different openings and other different structures. The upper portion 100a includes a number of supporting structures, such as various detection and monitoring mechanisms. The middle portion 100b is cylindrical. The three portions, namely the upper, middle, and lower portions 100a and 100b, form a roughly capsule-shaped overall structure.

[0020] like Figure 1 and Figure 2 The outer surface of the mixing jacket 200 also has a plurality of fixing structures 204 for fixing the mixing jacket 200 on the corresponding outer bracket 400. In this embodiment, there may be three fixing structures 204. Figure 1 and Figure 2 A fixing structure 204 is shown respectively, and it can be seen that another fixing structure 204 is not shown.

[0021] like Figure 1 and Figure 2 The outer bracket 400 mentioned above is used to install the mixing kettle on the corresponding site, for example, on the ground of a production workshop. The outer bracket 400 includes a side support structure 401, a longitudinal support structure 402, a pillar 403, a transverse reinforcement structure 404 and a base structure 405. The side support structure 401 is used to fix and support the mixing jacket 200 from the side of the mixing jacket 200, the longitudinal support structure 402 is used to fix and support the mixing jacket 200 from the fixing structure 204 of the mixing jacket 200, the pillar 403 provides the main supporting force, the transverse reinforcement structure 404 is connected to each pillar 403 near the bottom, and is used to make the entire outer bracket 400 more solid and stable, and the base structure 405 is used to fix the pillar 403 on the corresponding site.

[0022] like Figure 1 and Figure 2 The mixing drive device 300 includes a mixing motor 301, a mixing reducer 302, a mixing frame 303, and a mixing head 304. The mixing frame 303 has structures such as a mixing transmission shaft (not shown) and a mixing coupling (not shown). Other structures of the mixing drive device 300 also include structures for mechanical sealing and auxiliary sealing. The mixing drive device 300 is used to provide hybrid power to the solute and solvent inside the mixing kettle body 100. When the corresponding power is stirring power, the mixing drive device 300 can stir the solvent and solute to achieve dissolution of the solute.

[0023] like Figure 1 The mixing drive device 300 includes a mixing rotating shaft 306 and two mixing stirring blades 307 and a mixing stirring pusher blade 308 mounted on the mixing rotating shaft 306. The mixing rotating shaft 306 is fixed to a shaft segment (not specifically labeled) extending from the mixer head 304 via a connecting structure 309. The connecting structure 309 can connect the corresponding shaft segment and the mixing rotating shaft 306 by, for example, screwing. The placement of the connecting structure 309 in this position facilitates the installation of the entire mixing drive device 300 in the mixing kettle body 100. The first blade mounted from top to bottom on the mixing rotating shaft 306 is the mixing stirring blade 307, and the last blade is the mixing stirring pusher blade 308. The corresponding stirring structure of the mixing drive device 300 includes at least one mixing stirring blade 307 and at least one mixing stirring pusher blade 308, thus forming a multi-stage stirring structure. The mixing stirring blades 307 and the mixing stirring pusher blades 308 can be composed of two, three, four, or five blades. By combining two different blades, the mixing capability of the hybrid drive device 300 can be made more comprehensive.

[0024] refer to Figure 1 and Figure 2 The hybrid drive device 300 further includes a hybrid drive mounting seat 305, which also serves as a sealed kettle cover for sealing the hybrid kettle body 100. The hybrid drive mounting seat 305 is sealed and mounted on the upper kettle edge 105, thereby forming a Figure 3 The sealing function of the upper kettle opening 107 is shown. Sealing condition is one of the important conditions for the use of the mixing kettle provided by the embodiment of the present invention. The embodiment of the present invention is equivalent to making the mixing drive mounting seat 305 a part of the mixing kettle body 100. Such a design can fully utilize the mutual cooperation of the two structures.

[0025] refer to Figures 1 to 3The mixing kettle further includes a solvent input structure 110, a solute input structure 120, a mixing pressure detection and control structure 130, a mixing temperature detection structure, and a mixing liquid level detection structure, which are mounted on the mixing kettle body 100. The solvent input structure 110 is mounted on the upper portion 100a of the mixing kettle body 100 using a first mounting seat 101. At least a portion of the solvent input structure 110 is located inside the mixing kettle body 100, and this portion can be fixed to the inner wall of the mixing kettle body 100 via a fixed pipe structure 112. The solute input structure 120 is mounted on the upper portion 100a of the mixing kettle body 100 using a second mounting seat 102. The mixing pressure detection and control structure 130 is mounted on the upper portion 100a of the mixing kettle body 100 using a third mounting seat 103.

[0026] Figure 1 Furthermore, in a first cross-section of the mixing vessel 100 passing through the longitudinal axis 109, the solvent input structure 110 and the solute input structure 120 are located on either side of the longitudinal axis 109. This symmetrical design facilitates the input and mixing of the solvent and solute, and also contributes to the regularity of the overall structure. The solvent input structure 110 is used to continuously input a measured amount of solvent into the mixing vessel 100. The solute input structure 120 is used to continuously input a measured amount of solute into the mixing vessel 100. The solute may first be melted in other equipment and then input into the mixing vessel 100 through the solute input structure 120.

[0027] Figure 2 It is also shown that the mixed temperature detection structure and the mixed liquid level detection structure are combined into a mixed temperature liquid detection structure 140. The mixed temperature liquid detection structure 140 is used to detect the internal liquid temperature and liquid level at the same time, and its detection part is located inside the mixing kettle body 100. Figure 2 and Figure 3 As can be seen, the mixing temperature and liquid detection structure 140 is mounted on the upper portion 100a of the mixing kettle body 100 using the fourth mounting base 104. Since the solvent is an organic substance with a typically low boiling point and easy vaporization, accurate liquid level detection is necessary to provide real-time visibility of the liquid state within the kettle. Contact-type liquid detection devices are particularly effective in achieving this precise level detection. Liquid temperature is also crucial to solution formation. Therefore, locating the detection portion of the mixing temperature and liquid detection structure 140 within the mixing kettle body 100 ensures more accurate liquid temperature detection.

[0028] Figure 1 and Figure 2 It is also shown that at least one mixing baffle 150 is provided inside the mixing kettle body 100. The mixing baffle 150 is fixed inside the mixing kettle body 100 via a baffle fixing structure 151. The number of the mixing baffle 150 can be one or more.

[0029] like Figure 1 and Figure 3As shown, the solute input structure 120 includes a solute outlet 123 located inside the mixing tank body 100, and the solute outlet 123 is arranged close to the longitudinal axis 109 of the mixing tank body 100. Figure 1 and Figure 3 In FIG. 1 , the longitudinal axis 109 is shown as a longitudinal dashed line. Figure 1 and Figure 3 In the cross section shown, the longitudinal axis 109 substantially divides the mixing kettle body 100 and the mixing rotating shaft 306 into equal parts on the left and right sides, that is, the longitudinal axis 109 is the central axis of the mixing kettle body 100 in the longitudinal direction.

[0030] The distance D between the solute outlet 123 and the longitudinal axis 109 (reference Figure 1 and Figure 3 ) is one-tenth to one-third of the cross-sectional radius R of the mixing kettle body 100. It should be noted that the cross-sectional area of ​​various kettle bodies generally refers to the cross-sectional area of ​​the main body thereof. In this embodiment, it is the cross-sectional area of ​​the middle portion 100b of the mixing kettle body 100. The middle portion 100b is cylindrical and thus has a circular cross-sectional area. It can be seen that the cross-sectional radius R is the inner diameter of the circular ring.

[0031] To ensure that the solute outlet 123 is close to the longitudinal axis 109 , the distance D is set within one third of the cross-sectional radius R in this embodiment.

[0032] The solvent input structure 110 includes a solvent outlet 111 located within the mixing kettle body 100. The solvent outlet 111 extends to the lower portion 100c of the mixing kettle body 100. The solute outlet 123 is positioned above two-thirds of the height of the mixing kettle body 100, ensuring that the solute is introduced into the solvent from above the liquid level. This prevents the solute from initially agglomerating at the solute outlet 123 due to the resistance of the liquid surface, and prevents the solute from sinking directly to the bottom of the mixing kettle body 100 due to gravity. This reduces the possibility of agglomeration and precipitation, improves the dispersion of the solute in the solvent, and enhances mixing efficiency and uniformity. When using the mixing kettle, the liquid level is typically maintained below two-thirds of the height of the mixing kettle body 100.

[0033] like Figure 1 and Figure 3 As shown, the solute input structure 120 allows the solute outlet 123 to be located near the longitudinal axis 109 through the single bend structure of the conduit. Figure 3 As shown, the single-bend structure includes a vertical portion 121 and an inclined portion 122 (ie, the solute input structure 120 includes a vertical portion 121 and an inclined portion 122), and there is a single-bend angle α ( Figure 3The single bending angle α is marked at the bend position formed by the smooth transition between the vertical portion 121 and the inclined portion 122. The single bending angle α is greater than or equal to 120 degrees and less than or equal to 165 degrees, thereby ensuring that the solute outlet 123 has an outlet plane that is obliquely upward toward the longitudinal axis 109 and ensuring that the structure is stable and reliable. The outlet plane of the solute outlet 123 is oriented in a direction perpendicular to the outlet plane and outward, such as Figure 3 As shown by the hollow arrow T, the hollow arrow T is obliquely upward toward the longitudinal axis 109 , that is, the outlet plane is obliquely upward toward the longitudinal axis 109 .

[0034] The single-bend structure places the solute outlet 123 close to the longitudinal axis 109 of the mixing vessel 100, which facilitates uniform distribution of the solute within the mixing vessel. The solute is injected near the center of the mixing vessel 100, facilitating diffusion throughout the vessel and reducing localized concentrations. The single-bend structure is simple, lowering manufacturing costs and installation difficulty. It also reduces eddy currents and turbulence in the pipeline, reducing pressure loss and fluid resistance within the pipeline. This allows the solute to enter the mixing vessel more smoothly, improving mixing uniformity and efficiency, and enhancing the overall stability and reliability of the equipment.

[0035] At the same time, in this embodiment, the angle β between the outlet plane of the solute outlet 123 and the longitudinal axis 109 is set to be between 15 degrees and 60 degrees. Optimizing the angle β (between 15 degrees and 60 degrees) can further optimize the initial contact angle between the solute and the solvent, reduce mixing time, and further improve mixing efficiency and production efficiency.

[0036] like Figure 4 In another embodiment, the solute outlet 123 has a sieve structure instead of a whole hole. The sieve structure includes multiple sub-outlets 1231, and the shape of the sub-outlet 1231 is a regular hexagon (in other embodiments, it can also be other polygons, circles or ellipses). That is, the solute outlet 123 of this embodiment has an outlet structure similar to the surface of a shower head, or a hollow structure. The reasons for this design include: although the solute is basically in liquid form, its viscosity is relatively high. After being squeezed out of the solute outlet 123, it is easy to agglomerate. Once agglomeration occurs, it is difficult to dissolve. By designing a solute outlet 123 with a sieve structure, the viscous solute can be further dispersed and squeezed out by multiple sub-outlets 1231, similar to the state of "squeezing noodles", the solute is dispersed and squeezed into multiple thin streams into the solvent. Such a design can prevent the solute from agglomerating and promote the rapid dissolution of the solute.

[0037] In another embodiment, if Figure 5 As shown, the solute outlet 123 is a notched circular tube structure. Figure 5 The solute outlet 123 and the inclined portion 122 are in the shape of a horizontally rotated English letter "C". Figure 5Separated by a dotted line (this dotted line is not marked), Figure 5 Only one section of the inclined portion 122 is shown. The lower surface of the notched circular tube structure has a plurality of sub-outlets 1231, and the shape of the sub-outlets 1231 is circular. In other embodiments, the sub-outlets 1231 can also be polygonal or elliptical.

[0038] It should be noted that Figure 5 Shown is different from Figure 4 angle, Figure 5 This is a schematic diagram of the solute outlet 123 when viewed from above. This schematic diagram also shows the cross-sectional structure of the mixing rotating shaft 306. It can be seen that the sub-outlet 1231 is a circular hole opened downward to facilitate the corresponding solute to be injected downward into the solvent. Figure 5 It can also be seen that, except for the notch portion, the sub-outlet 1231 of the solute outlet 123 surrounds the periphery of the mixing rotating shaft 306. At the same time, the notch width w of the notch circular tube structure is greater than or equal to the cross-sectional diameter d of the mixing rotating shaft 306 (at this time, the longitudinal axis 109 is perpendicular to the Figure 5 The center of the cross section of the mixing rotating shaft 306 coincides with the longitudinal axis 109), so that when the solute outlet 123 is installed, the mixing rotating shaft 306 can be installed to the corresponding notch. Figure 1 and Figure 2 The position shown, or in other words, ensuring that the installation of the mixing rotating shaft 306 is not affected by the corresponding shape of the solute outlet 123.

[0039] The solute outlet 123 is designed as a notched circular tubular structure, wherein the notch width w is greater than or equal to the cross-sectional diameter d of the mixing rotating shaft 306. This design ensures that the mixing rotating shaft 306 can smoothly pass through the notched portion of the solute outlet during installation, thereby enabling the multiple sub-outlets 1231 to be arranged around the periphery of the mixing rotating shaft 306, thereby avoiding mutual interference between the solute outlet 123 and the mixing rotating shaft 306, and without requiring the mixing rotating shaft 306 to be changed. Furthermore, since the lower surface of the solute outlet 123 has multiple sub-outlets 1231, these sub-outlets 1231 are downwardly opened as circular holes (or other shapes, such as polygonal or elliptical), which facilitates the uniform and efficient dispersion, extrusion and injection of the solute into the solvent, thereby better preventing solute agglomeration and the like, and increasing the dispersion speed and uniformity of the solute in the solvent, thereby improving the mixing effect and mixing efficiency.

[0040] like Figure 6 In another embodiment, the number of mixing stirring blades 307 and mixing stirring pushing blades 308 on the mixing rotating shaft 306 is the same, two each, and they are installed on the mixing rotating shaft 306 at intervals, that is, from top to bottom they are the first mixing stirring blade 307, the first mixing stirring pushing blade 308, the second mixing stirring blade 307 and the second mixing stirring pushing blade 308.

[0041] An embodiment of the present invention provides a transfer kettle for continuously transferring flash spinning solution.

[0042] like Figures 7 to 9 As shown, the transfer kettle includes a transfer kettle body 500, a transfer jacket 600, and a transfer drive device 700. It should be noted that in the various cross-sectional structural diagrams of the transfer kettle, only the transfer kettle body 500 and the transfer jacket 600 are partially shown in cross-section (hence the corresponding cross-sectional oblique lines), while most other structures are shown in non-cross-sectional schematic structures. This is done to better illustrate the various structures of the transfer kettle.

[0043] like Figure 9 As shown, the transfer kettle body 500 has an upper opening 507 and a lower opening 508. The upper opening 507 is defined by the corresponding upper kettle edge 505, and the lower opening 508 is defined by the corresponding lower kettle edge 506. Design considerations for the upper opening 507 Figure 7 and Figure 8 The installation of the transfer drive device 700 and the sealing of the entire structure are shown. The design of the lower opening 508 takes into account the viscosity, temperature and other characteristics of the solution to ensure the required requirements for solution output, while ensuring accurate measurement and stable delivery of the solution to ensure the continuity and stability of the entire production line. The upper opening 507 is the largest opening of the transfer kettle body 500 and is used for Figure 7 and Figure 8 The transfer drive device 700 and other external structures are installed and extended into the transfer kettle body 500. Figures 7 to 9 The lower opening 508 serves as the outlet of the transfer kettle for outputting the solution, and is used to further provide the transferred solution to the next process (such as providing it to the process related to the subsequent spinning equipment).

[0044] Figure 9 The transfer kettle body 500 is also shown as comprising an upper kettle portion 500a, a middle kettle portion 500b, and a lower kettle portion 500c. The dividing line between the upper and middle kettle portions 500a, 500b is indicated by a dashed line h, and the dividing line between the middle and lower kettle portions 500b, 500c, is indicated by a dashed line l. The upper and lower kettle portions 500a, 500c are essentially symmetrical, spherical cap-like structures, but they have the aforementioned different openings and other different structures. The upper kettle portion 500a has a number of supporting structures, such as various detection and monitoring devices. The middle kettle portion 500b is cylindrical. The three parts, the upper, middle, and lower kettle portions 500a, 500b, and 500c, form a roughly capsule-shaped overall structure.

[0045] like Figures 7 and 8The transfer jacket 600 is provided on the outside of the transfer kettle body 500 and is used to control the temperature of the transfer kettle body 500. The transfer jacket 600 is a hollow structure, which is covered on the outer surface of the transfer kettle body 500 and is combined with the transfer jacket 600 to form a heat exchanger. Figure 9 As can be seen, a portion of the transfer jacket 600 is attached to the majority of the outer surface of the middle kettle portion 500b, while another portion of the transfer jacket 600 is attached to the majority of the outer surface of the lower kettle portion 500c. The shape of the transfer jacket 600 is therefore determined by the corresponding outer shape of the transfer kettle body 500, and in this embodiment, it is a barrel-like structure.

[0046] like Figure 7 The transfer jacket 600 has a corresponding external heat inlet 601 and an external heat outlet 602, which can usually transfer or remove heat through the circulation of heat transfer media such as steam, water or oil. That is, the temperature control of the transfer kettle body 500 by the transfer jacket 600 can be achieved through corresponding steam circulation, water circulation or oil circulation, and can further be reflected in the transfer jacket 600 controlling the increase, decrease or maintenance of the internal temperature of the transfer kettle body 500. The transfer jacket 600 also has a corresponding temperature detection structure 603. Figure 7 In the cross-sectional structure shown, the temperature detection structure 603 is arranged at an upper position substantially symmetrical to the external heat outlet 602 so as to detect the temperature at a position farther away from the external heat inlet 601, thereby being more conducive to accurate monitoring of the actual temperature control situation.

[0047] like Figure 7 and Figure 8 The outer surface of the transfer jacket 600 also has a plurality of external fixing structures 604, which are used to fix the transfer jacket 600 on the corresponding external bracket ( Figure 7 and Figure 8 Not shown, please refer to Figure 12 The external support 800 is used to install the transfer kettle on the corresponding place. The external solid structure 604 can have 3, Figure 7 and Figure 8 Each outer solid structure 604 is shown, and it is known that another outer solid structure 604 is not shown. The three outer solid structures 604 can be evenly distributed on the outer surface of the transfer jacket 600, that is, the angles between them and the corresponding centers of the plane circles in which they are located are all 120 degrees.

[0048] like Figure 7 and Figure 8The transfer drive device 700 includes a transfer motor 701, a transfer reducer 702, a transfer frame 703, and a transfer head 704. The transfer frame 703 internally houses a transfer drive shaft (not shown) and a transfer coupling (not shown). Other components of the transfer drive device 700 include mechanical seals and auxiliary seals. The transfer drive device 700 is used to provide balancing and transfer power for the solution within the transfer kettle 500, while maintaining solution stability.

[0049] like Figure 7 The transfer drive device 700 includes a transfer rotating shaft 706 and a transfer stirring blade 708. The transfer stirring blade 708 is mounted on the transfer rotating shaft 706. The transfer rotating shaft 706 is fixed to a shaft segment (not specifically labeled) extending from the transfer head 704 via an assembly structure 709. The assembly structure 709 can be specifically connected to the corresponding shaft segment and the transfer rotating shaft 706 by, for example, a screw connection. A corresponding transfer stirring blade 708 is mounted on the bottom of the transfer rotating shaft 706. Since a single transfer stirring blade 708 is included, the transfer kettle of this embodiment has a single-stage stirring structure.

[0050] refer to Figure 7 and Figure 8 The transfer drive device 700 further includes a transfer drive mounting seat 705, which also serves as a sealing kettle cover for sealing the transfer kettle body 500. The transfer drive mounting seat 705 is sealed and mounted on the upper kettle edge 505, thereby forming a Figure 9 The upper opening 507 is shown to have a sealing effect.

[0051] refer to Figures 7 to 9 The transfer kettle further includes a solution input structure 510, a transfer pressure detection and control structure 530, a transfer temperature detection structure, and a transfer liquid level detection structure, all mounted on the transfer kettle body 500. The solution input structure 510 is mounted on the upper kettle portion 500a using a first mounting base 501. The piping portion located within the solution input structure 510 is secured to the inner wall of the transfer kettle body 500 via a fastener structure 512. The transfer pressure detection and control structure 530 is mounted on the upper kettle portion 500a of the transfer kettle body 500 using a third mounting base 503.

[0052] Figure 7 and Figure 9 The solution input structure 510 also includes a solution internal input port 511. The solution internal input port 511 is located within the interior space of the transfer vessel 500 and is disposed on the inner sidewall of the transfer vessel 500. The solution internal input port 511 is positioned less than half the height of the transfer vessel 500. The solution input structure 510 may also include components such as a valve (not shown) and a flow meter (not shown) for controlling the flow rate and flow velocity of the solution.

[0053] The design of the transfer kettle facilitates the entry and exit of solutions and the maintenance of the internal structure. The transfer kettle body 500, transfer jacket 600, and transfer drive device 700 cooperate to provide temperature control and power guarantee. Auxiliary structures such as the solution input structure 510, transfer pressure detection and control structure 530, transfer temperature detection structure, and transfer liquid level detection structure enable the entire system to accurately control temperature, pressure, and liquid level. The solution input port 511 is set on the inner wall of the transfer kettle body 500, and the height is located below one-half of the height of the transfer kettle body to facilitate the stable input of the solution and avoid phase separation of the solution during the transfer process. The overall structure ensures the uniformity and stability of the transferred flash spinning solution, thereby improving the production efficiency of the flash spinning process.

[0054] At the same time, the height of the solution input port 511 is controlled to be above one-third of the height of the transfer kettle body 500, that is, the height of the solution input port 511 is controlled to be between one-third and one-half of the height of the transfer kettle body 500. Figure 7 and Figure 9 In the figure, the dotted line m represents the position of one-half of the height of the transfer kettle body 500, and the dotted line f represents the position of one-third of the height of the transfer kettle body 500, and the solution input port 511 is located between the dotted line f and the dotted line m.

[0055] The transfer temperature detection structure and the transfer liquid level detection structure form a combined function, the transfer temperature and liquid detection structure 540. Mounted on the upper portion 500a of the transfer kettle 500 using the fourth mounting base 504, the transfer temperature and liquid detection structure 540 is used to simultaneously detect the temperature and liquid level of the liquid within. The detection portion of the transfer temperature and liquid detection structure 540 is located within the transfer kettle 500. This location also ensures more accurate temperature detection.

[0056] The transfer vessel 500 has at least one transfer baffle 550 inside. The transfer baffle 550 is secured to the interior of the transfer vessel 500 by a blocking and fixing structure 551. The number of blocking and fixing structures 551 can be one or more. The transfer baffle 550 is used to prevent the formation of deep vortices on the liquid surface during the stirring process. Deep vortices are detrimental to solution stability and may also cause more inert gas to dissolve into the liquid, hindering the subsequent spinning process of the spinning solution.

[0057] At least a portion of the transfer temperature liquid detection structure 540 is fixed to the transfer baffle 550. This structure is beneficial for protecting the transfer temperature liquid detection structure 540. The transfer temperature liquid detection structure 540 needs to be immersed in the liquid. The stirred liquid will generate a corresponding force on the transfer temperature liquid detection structure 540, and the transfer baffle 550 can prevent the corresponding liquid force from damaging the transfer temperature liquid detection structure 540. The transfer temperature liquid detection structure 540 can be fixed to the transfer baffle 550 using a blocking fixing structure 551. In order to reinforce the transfer temperature liquid detection structure 540, Figure 8 It is also shown that the transfer temperature liquid detection structure 540 is fixed to the inner wall of the transfer kettle body 500 and the transfer baffle 550 using the transfer temperature liquid fixing structure 552.

[0058] In summary, the transfer kettle provided in this embodiment has a transfer kettle body 500, a transfer jacket 600, a transfer drive device 700, and a solution input structure 510, a transfer pressure detection control structure 530, a transfer temperature detection structure and a transfer liquid level detection structure and other corresponding detection and control structures. The structure is sophisticated but the functions are comprehensive. At the same time, the position and height of the solution input port 511 are specially set, so that its height is specially set to less than half (and more than one third) of the height of the transfer kettle body 500, so as to facilitate the uniform distribution and effective transfer of the solution in the kettle body, meet the continuous use requirements of subsequent flash spinning solution, and can ensure high transfer efficiency and good detection and control accuracy (the state of the solution in the transfer kettle, such as pressure, temperature, liquid level and viscosity, can be monitored and controlled in real time and accurately), which helps to ensure the stability of the production process and product quality.

[0059] In another embodiment of the present invention, Figure 10 and Figure 11 As shown, the transfer kettle further includes an internal temperature control structure, which includes a temperature control tube 711 . The temperature control tube 711 is sleeved on the transfer rotating shaft 706 , and a gap 710 is formed between the temperature control tube 711 and the transfer rotating shaft 706 . Figure 10 is a top view schematic diagram of the internal temperature control structure, Figure 11 This is a schematic diagram of the cross-sectional structure of the internal temperature control structure installed in the transfer kettle.

[0060] This embodiment provides a corresponding temperature control tube 711 inside the transfer kettle 500, thereby enabling auxiliary temperature control from inside the transfer kettle 500, thereby enabling faster and more timely adjustment and control of the temperature of the solution at the middle position inside the transfer kettle 500, thereby better preventing adverse phenomena such as phase separation of the solution, better maintaining the stability of the solution, and solving the corresponding process difficulties. At the same time, combined with Figure 10 and Figure 11It can be seen that the temperature control tube 711 of this embodiment is a corresponding straight tube sleeve structure without corresponding bending positions, which is more conducive to the internal auxiliary temperature control of the corresponding solution.

[0061] To ensure that the temperature control tube 711 can still control the temperature of the middle portion of the upper solution even when the solution level is at its highest, the top height of the temperature control tube 711 is designed to be greater than or equal to the maximum liquid level of the solution in the transfer kettle 500 (this maximum liquid level refers to the maximum liquid level of the solution in the transfer kettle 500 after the subsequent method enters the continuous liquid supply step). At this point, even if the solution reaches the maximum liquid level, the temperature control tube 711 can still control the temperature of the solution in the middle position, thereby better and more quickly controlling the temperature of each part of the solution. Since the transfer jacket 600 serves as an external temperature control structure, it is primarily attached to the majority of the outer surface of the middle kettle portion 500b of the transfer kettle 500 and the majority of the outer surface of the lower kettle portion 500c. The heat transfer medium is delivered into the transfer jacket 600 through the external heat inlet 601, which is located below the transfer jacket 600. Therefore, controlling the temperature of the middle portion of the upper solution via the temperature control tube 711 has a positive effect on the corresponding process.

[0062] In order to save energy and achieve precise temperature control, in another embodiment, the temperature control tube 711 is designed to have the function of segmented temperature control, so that the temperature control tube 711 can control the temperature according to the height of the liquid level inside the transfer kettle, that is, it can realize a segmented (different height parts) temperature control method from bottom to top.

[0063] In another embodiment, the bottom height of the temperature control tube 711 is designed to be lower than the minimum liquid level of the solution in the transfer kettle 500 (after the continuous transfer step is started). In this case, it is ensured that after the continuous transfer step is started, even when the liquid level is at its minimum, a section of the temperature control tube 711 is still immersed in the solution, so that the temperature control tube 711 can always control the temperature of the solution located in the middle position of the transfer kettle 500, thereby better and more quickly controlling the temperature balance of the solution.

[0064] Combined with reference Figure 10In this alternative embodiment, the inner diameter (not labeled) of the temperature control tube 711 is set to be at least twice the cross-sectional diameter (not labeled) of the transfer shaft 706, and the outer diameter (not labeled) of the temperature control tube 711 is set to be at least 2.5 times but less than 5 times the cross-sectional diameter of the transfer shaft 706. These dimensions are designed to facilitate installation while ensuring auxiliary temperature control requirements. The inner diameter of the temperature control tube 711 is more than twice the cross-sectional diameter of the transfer rotating shaft 706, ensuring that the temperature control tube 711 can surround the transfer rotating shaft 706 and that the temperature control tube 711 is always located in the middle of the transfer kettle body 500. At the same time, the transfer rotating shaft 706 can rotate freely in the temperature control tube 711 without contact. A gap 710 is provided to allow the solution to flow freely in the gap 710. This part of the gap 710 can also achieve effective heating and heat transfer. The outer diameter is between 2.5 times and 5 times, which ensures that the temperature control tube 711 has sufficient wall thickness to withstand the pressure and temperature during the temperature control process and provide the required auxiliary temperature control requirements, while avoiding unnecessary material waste and processing difficulties caused by excessive size.

[0065] Combined with reference Figure 10 and Figure 11 , the temperature control tube 711 is fixed to the surface position of the transfer head 704 of the transfer drive device 700 through multiple upper arms 712, so that the temperature control tube 711 does not rotate with the transfer rotation shaft 706. In order to ensure the installation and fixation of the temperature control tube 711 and the transfer drive device 700, feasibility, potential safety risks and maintenance costs need to be considered. From the perspective of ensuring the normal operation and work efficiency of the equipment, and making full use of the available position and space of the entire structure, it is proposed to fix the temperature control tube 711 with the upper arm 712, so that the entire internal temperature control system can be realized. The transfer head 704 is usually protected by a thicker metal shell, and screw holes are made on its surface, and then the upper arm 712 is fixed to the transfer head 704 with pins or screws. The corresponding surface of the transfer head 704 has a certain degree of curvature, and the inner wall surface of the upper arm 712 can be designed to have a corresponding degree of curvature (curvature), and through corresponding design and adjustment, the inner wall surface of the upper arm 712 can be better and tightly attached to the corresponding surface of the transfer head 704. As Figure 10 , the upper arm 712 has corresponding screw holes (not marked), such as Figure 11 , the upper arm 712 is finally fixed to the transfer head 704 by screws 713.

[0066] like Figure 11To achieve the temperature control function of the temperature control tube 711, it must be connected to a power control line 714 to receive electrical energy and convert it into heat. The power control line 714 can be connected to an external power source (not shown) and a control system (not shown) via a lead conduit 715 and the lead assembly 509 of the transfer kettle body 500. Specifically, the power control line 714 passes through the lead conduit 715 and is connected to the outside of the transfer kettle body 500. The lead conduit 715 is located in the lead assembly 509 of the upper kettle portion 500a of the transfer kettle body 500. The lead conduit 715 provides a safe and reliable connection channel for the power control line 714. The lead conduit 715 must ensure that the power control line 714 passes through while ensuring the overall sealing of the transfer kettle body 500. Therefore, the lead conduit 715 has a corresponding sealing structure to secure and seal the power control line 714. The lead conduit 715 can be sealed with corresponding sealant, sealing gasket or other sealing materials, or directly with other organic substances, and the lead conduit 715 can also be added with other mechanical sealing reinforcement structures to ensure that the lead conduit 715 and the lead assembly seat 509 are effectively sealed.

[0067] like Figure 11 In this embodiment, the solution input port 511 is a trumpet-shaped opening with a larger diameter as it approaches the end.

[0068] An embodiment of the present invention provides a multi-kettle system for continuously providing and transferring flash spinning solution.

[0069] The multi-tank system includes: multiple mixing tanks and a transfer tank, please refer to Figure 12 In this embodiment, the number of mixing kettles is six. Figure 12 The mixing kettle comprises a mixing kettle body 100, a mixing jacket 200, a mixing drive device 300 and an outer support 400; the transfer kettle comprises a transfer kettle body 500, a transfer jacket 600, a transfer drive device 700 and an outer support 800. More structures of the mixing kettle can be referred to the above embodiments (including Figures 1 to 6 ) corresponding content. More structures of the transfer kettle can refer to the above embodiments (including Figures 7 to 11 ) corresponding content.

[0070] The multi-kettle system provided in this embodiment is used to realize the continuous supply of flash spinning solution to ensure that production is not interrupted and stable mass production is achieved. The principles include: the design of the kettle body required for the production of flash spinning solution is subject to various conditions, and the volume and parameter settings of each kettle body are limited; and in the flash spinning process for preparing and consuming solution, the consumption rate is usually faster than the preparation rate; if only a pair of mixing kettles and transfer kettles of roughly equal size are set in the system, then once the solution prepared by the mixing kettle is exhausted, the production process has to be interrupted to wait for the mixing kettle to remix; this not only affects production efficiency, but also may waste more solution due to restarting various production links (such as restarting the spinning process) (because the solution of the initial part and the solution of the final part of a process are usually not used to produce the required product), which reduces efficiency and increases cost; if a single large-volume mixing kettle is designed in conjunction with a transfer kettle, it will not only be due to Customizing a large-volume mixing kettle may lead to various design difficulties and increased costs, and the large volume of the mixing kettle may also affect operational efficiency and more safety issues. Therefore, the embodiment of the present invention is carefully designed, adopts a parallel structure of multiple mixing kettles and a cascade structure of a mixing kettle and a transfer kettle, and comprehensively considers the physical and chemical properties of the flash spinning solution that need to be considered in the kettle body design. The main design elements of the kettle body are basically the same, and multiple mixing kettles are designed to be connected to the transfer kettle through a selective connection structure. This system is not only conducive to the redundancy of the design and the convenience of design and use, and realizes the continuous and stable supply of flash spinning solution, but also facilitates the addition, maintenance and replacement of each kettle body, ensuring the stability of the solution composition, improving production efficiency, saving solution, reducing costs, and ensuring the quality stability of the final product and the continuous production requirements.

[0071] In other embodiments, the number of mixing kettles can be, for example, two to twenty (the specific number can be selected based on factors such as the time for preparing and supplying the solution and the time it takes for the spinning process to consume the solution), while the number of transfer kettles is always maintained at one, that is, multiple mixing kettles jointly provide the solution to the transfer kettle, and the supply method is carried out in sequence. Two to twenty mixing kettles are used in sequence to prepare the solution, and each mixing kettle will prepare the solution according to a predetermined order and rhythm until the solution is formed. Since there are two to twenty mixing kettles, it can be ensured that at any time, there is at least one mixing kettle that can provide the solution, while the other mixing kettles are preparing the solution or waiting for the next supply, and the transfer kettle transfers the solution to the next production process. During the entire process, the operating status of each mixing kettle and transfer kettle can be monitored in real time, and the preparation rhythm of the mixing kettle and the transfer speed of the transfer kettle can be appropriately adjusted according to actual needs and production plans to ensure smooth production. A multi-kettle system using two to twenty mixing kettles can efficiently and continuously provide and transfer flash spinning solution to meet the needs of large-scale production.

[0072] like Figure 12 In this embodiment, the lower kettle port 108 of the mixing kettle body 100 is connected to a mixing output control valve 900; a transfer input control valve 930 is provided at the inlet of the solution input structure 510; and a transfer output control valve 940 is connected to the lower opening 508 of the transfer kettle body 500. The mixing output control valve 900 connected to the lower kettle port 108 is used to precisely control the flow rate and timing of the solution flowing out of each mixing kettle, ensuring that the solution enters the transfer kettle at the appropriate time and at the appropriate flow rate. The transfer input control valve 930 provided at the inlet of the solution input structure 510 is responsible for regulating the flow rate of the solution entering the transfer kettle, ensuring a smooth and efficient transfer process, while preventing solution backflow and maintaining pressure and flow balance within the system. The transfer output control valve 940 connected to the lower opening 508 of the transfer kettle body 500 is responsible for continuously and stably outputting uniform flash spinning solution from the transfer kettle for use in subsequent production processes.

[0073] Check valves (also known as one-way valves or non-return valves) can be used for the mixed output control valve 900, the transfer input control valve 930, and the transfer output control valve 940. Check valves are typically designed to ensure unidirectional flow of the solution, effectively preventing backflow of the solution due to pressure fluctuations or operational errors, further enhancing system stability and safety.

[0074] The multi-kettle system of this embodiment can not only realize the continuous and stable supply of flash spinning solution, but also significantly improve the automation level and operational flexibility of the system, thereby providing a guarantee for high-quality and efficient flash spinning production.

[0075] like Figure 12 In this embodiment, the mixing output control valve 900 of each of the three mixing kettles is connected to an electronic four-way ball valve 910, and then the two electronic four-way ball valves 910 are connected to an electronic three-way ball valve 920, and the electronic three-way ball valve 920 is connected to the transfer input control valve 930 of the solution input structure 510.

[0076] like Figure 12 The two electronic four-way ball valves 910 each have four channels. Each electronic four-way ball valve 910 can selectively receive solutions from one of the three mixing kettles. The fourth channel serves as a connection to the electronic three-way ball valve 920. Based on pre-set programs and signals, they can selectively direct the solution from the mixing kettle to the transfer kettle. They coordinate and regulate together, as typically only one channel of the two electronic four-way ball valves 910 is open at any given time to introduce the solution prepared in the corresponding mixing kettle. Depending on which of the two electronic four-way ball valves 910 outputs the solution, the corresponding channel of the two inlet channels of the electronic three-way ball valve 920 is opened, and the output channel of the electronic three-way ball valve 920 is opened accordingly.

[0077] In other embodiments, when the number of mixing kettles is five, the mixing output control valves of two mixing kettles can be connected to one electronic three-way ball valve, the mixing output control valves of three mixing kettles can be connected to one electronic four-way ball valve, one electronic four-way ball valve and one electronic three-way ball valve can be further connected to another electronic three-way ball valve, and the latter electronic three-way ball valve can be connected to the transfer input control valve of the solution input structure.

[0078] In other embodiments, when the number of mixing kettles is seven, the mixing output control valves of two mixing kettles are connected to one electronic three-way ball valve, the mixing output control valves of three mixing kettles are connected to one electronic four-way ball valve, one electronic four-way ball valve and two electronic three-way ball valves are further connected to another electronic four-way ball valve, and the latter electronic four-way ball valve is connected to the transfer input control valve of the solution input structure.

[0079] like Figure 12 The mixed output control valve 900 and the electronic four-way ball valve 910 are connected by a first pipe 901, the electronic four-way ball valve 910 and the electronic three-way ball valve 920 are connected by a second pipe 902, the electronic three-way ball valve 920 and the transfer input control valve 930 are connected by a third pipe 903, and the transfer output control valve 940 is connected to the fourth pipe 904.

[0080] In this embodiment, the lengths of the first pipes 901 are equal, so Figure 12 In the figure, one of the first pipes 901 of different lengths is shown in a disconnected manner to indicate that the figure is only for reference. In actual layout, the first pipes 901 are of equal length and can be the same in shape and size. The advantages of this can be referred to in the subsequent Figure 14 and Figure 15 Similarly, the lengths of the second pipes 902 are equal.

[0081] In this embodiment, the first pipe 901, the second pipe 902, the third pipe 903 and the fourth pipe 904 all have a pipe temperature control structure (not shown). These pipe temperature control structures can generally be composed of three parts: a temperature sensor, a controller and an actuator. The temperature sensor is responsible for monitoring the temperature of the solution in the pipe and transmitting the temperature signal to the controller; the controller calculates the temperature that needs to be adjusted based on the preset temperature range and the received temperature signal, and sends an instruction to the actuator; the actuator, according to the instruction of the controller, adjusts the heating or cooling equipment in the pipe to make the temperature of the fluid in the pipe reach the preset range. These pipe temperature control structures can be separate control structures for each section or an overall control structure.

[0082] Each electronic multi-way (three-way or four-way) ball valve also performs corresponding temperature control. Therefore, on the one hand, an electronic multi-way (three-way or four-way) ball valve with temperature control function can be used, and on the other hand, the corresponding function can be achieved by covering the external valve temperature control structure on the outside of the ball valve.

[0083] It should be noted that the control valve, pipeline, ball valve and other structures between the mixing kettle and the transfer kettle in the above embodiments constitute the corresponding alternative structure, or in other words, they are part of the alternative structure.

[0084] like Figure 12 The six mixing kettles are arranged in a row. This layout is not only easy to manage and operate, but also makes the solution transfer path clearer and more efficient. This system is suitable for sites with longer distances.

[0085] In another embodiment, if Figure 13 As shown, six mixing tanks are arranged in two rows, with the transfer tank located in the middle of the two rows. This design can minimize the transfer distance of the solution from the mixing tank to the transfer tank, improving transfer efficiency. This system is suitable for sites with relatively short distances.

[0086] Figure 13 In the figure, one of the first pipes 901 of unequal length is also shown in a disconnected manner. In fact, the first pipes 901 are of equal length, and may have the same shape and size, and the second pipes 902 are of equal length, and may have the same shape and size.

[0087] In summary, the multi-kettle systems provided in the above embodiments adopt multiple mixing kettles and one transfer kettle. The structures of each mixing kettle and transfer kettle are designed accordingly. At the same time, the lower kettle mouths of multiple mixing kettles are designed to be connected to the solution input structure inlet of the transfer kettle through a selected structure, thereby providing a solution for preparing, supplying and continuously transferring flash spinning solution, thereby improving the production efficiency and flexibility of flash spinning products.

[0088] Please refer to Figure 14 and Figure 15 , shows another embodiment of a multi-kettle system, in which six mixing kettles are arranged basically symmetrically around the transfer kettle, the six mixing kettles are roughly located at six points of a regular hexagon, and the transfer kettle is roughly located at the center of the regular hexagon. Figure 14 Due to the side view structure, only two mixing kettles are shown. Figure 15 The entire kettle structure can be seen.

[0089] In this embodiment, the mixed output control valve 900 is connected by a branch pipe 905, and the transfer input control valve 930 is connected by a confluent pipe 906. All branch pipes 905 are connected to the same position of the confluent pipe 906, that is, six branch pipes 905 are connected to the same confluent pipe 906.

[0090] In this embodiment, no corresponding ball valve is used, the branch pipe 905 is equivalent to the superposition of the first pipe and the second pipe in the above embodiment, and the merging pipe 906 is equivalent to the third pipe in the above embodiment.

[0091] In this embodiment, each branch pipe 905 is of equal length and identical in shape and size. This design improves the coordination of the entire solution mixing and supply system, enabling more efficient solution distribution and transmission, reducing unstable solution flow caused by differences in pipe length, shape, or size, and making parameters such as flow resistance and flow rate more consistent during the solution transmission process. This reduces imbalances within the system, improves the uniformity of solution mixing, and enhances the overall system production efficiency. The design, which does not utilize ball valves, simplifies the operating process, reduces system problems caused by improper valve operation and other malfunctions, reduces system maintenance costs, reduces the number of components requiring regular inspection and repair, improves system stability, facilitates system expansion and reduction, enhances system flexibility and scalability, and improves overall system performance.

[0092] In this embodiment, the branch pipe 905 is also designed to have a smooth curved structure, that is, the corresponding branch pipe 905 has no obvious corners, only a smooth curved transition portion. The smooth curved structure can reduce the flow resistance of the solution in the pipe, allowing the solution to pass through the pipe more smoothly, improving the transmission speed and efficiency of the solution, reducing energy consumption, reducing the possibility of solution retention and sedimentation, making the pipe easier to keep clean and less prone to clogging, and helping to maintain uniform mixing of the solution during the transmission process, thereby improving the quality and consistency of the product. In addition, the smooth curved structure reduces stress concentration inside the pipe, thereby reducing the risk of damage to the pipe due to long-term fluid impact, enhancing the durability of the pipe, and reducing production downtime and maintenance costs caused by pipe failure.

[0093] The embodiment of the present invention also provides a method for continuously providing and transferring flash spinning solution using a multi-kettle system.

[0094] The multi-tank system used in the method is as shown in the above embodiments, including multiple mixing tanks and a transfer tank, which can be combined with reference to Figures 1 to 13Corresponding content. The mixing kettle includes a mixing kettle body 100, a mixing jacket 200 and a mixing drive device 300. The mixing kettle body 100 has an upper kettle opening 107 and a lower kettle opening 108. The mixing jacket 200 is used to control the temperature of the mixing kettle body 100. The mixing drive device 300 is used to provide mixed power for the solute and solvent inside the mixing kettle body 100. The mixing kettle also includes a solvent input structure 110, a solute input structure 120, a mixing pressure detection and control structure 130, a mixing temperature detection structure and a mixing liquid level detection structure installed on the mixing kettle body 100. The transfer kettle includes a transfer kettle body 500, a transfer jacket 600 and a transfer drive device 700. The transfer kettle has an upper opening 507 and a lower opening 508. The transfer jacket 600 is used to control the temperature of the transfer kettle body 500. The transfer drive device 700 is used to provide balancing and transfer power for the solution inside the transfer kettle body 500. The transfer kettle further includes a solution input structure 510 , a transfer pressure detection control structure 530 , a transfer temperature detection structure, and a transfer liquid level detection structure installed on the transfer kettle body 500 .

[0095] like Figure 12 and Figure 13 The lower kettle ports 108 of the multiple mixing kettles are all connected to the inlet of the solution input structure 510 of the transfer kettle in an alternative structure.

[0096] Methods for continuously providing and transferring flash spinning solution using a multi-tank system include:

[0097] Multiple mixing kettles successively carry out solution preparation processes to form solutions; the first mixing kettle that forms the solution carries out the solution supply process, including supplying the solution from the first mixing kettle to the transfer kettle; the transfer kettle carries out the solution continuous transfer process, and the solution continuous transfer process includes continuously transferring the solution to the next production process; when the first mixing kettle has finished supplying the solution, the second mixing kettle that has completed the solution preparation process carries out the solution supply process, supplying the solution from the second mixing kettle to the transfer kettle, and the first mixing kettle re-enters the solution preparation process, and the process is carried out continuously in this order.

[0098] In this method, solutions are prepared and supplied sequentially from multiple mixing kettles. These solutions are then fed to transfer kettles, which continuously transfer the solutions to the next production process. After the multiple mixing kettles complete their preparations, the next preparation cycle immediately begins. The transfer kettles then continuously transfer the solutions to the next production process, ensuring timely delivery of the solutions. The coordinated operation of the mixing and transfer kettles results in a high degree of automation and reduced production costs. The close coordination of these steps ensures a smooth production process, high efficiency, and enhanced flexibility, reliability, and safety.

[0099] The first mixing kettle to form a solution is the first mixing kettle to complete solution preparation, which means that the solution inside the mixing kettle is ready to be supplied from the mixing kettle to the transfer kettle. The mixing kettle preparing and supplying the solution means that the mixing kettle provides the corresponding solution.

[0100] Multiple mixing tanks are used to prepare solutions sequentially, meaning each mixing tank performs the solution preparation steps sequentially until a solution is formed (preparation is complete). Once the first mixing tank completes solution preparation, it enters the solution supply process. In this process, solution is supplied from the first mixing tank to the transfer tank. After the transfer tank receives solution from the first mixing tank, the continuous solution transfer process begins. This process involves continuously transferring solution to the next production process, ensuring production continuity and stability.

[0101] When the solution from the first mixing kettle is completely supplied to the transfer kettle, it re-enters the solution preparation process and begins a new round of solution preparation. Simultaneously, the second mixing kettle, having completed solution preparation, takes over from the first mixing kettle and supplies its solution to the transfer kettle. This process continues in sequence, ensuring that each mixing kettle participates in the solution preparation and supply process in sequence. The entire multi-kettle system efficiently and continuously supplies and transfers flash spinning solution, jointly ensuring continuous and stable production.

[0102] The method provided in this embodiment enables the transfer kettle to also prevent the problem of excessive pressure drop of the solution. At this time, the transfer kettle is equivalent to the intermediate station of pressure or pressure in the production line. That is to say, the transfer kettle can not only ensure that the pressure of the solution reaches the required subsequent transfer requirements, but also keep the pressure at each position within the required range of dynamic balance. This is another reason for designing a multi-stage multi-kettle structure, namely: the corresponding multi-kettle system includes a two-stage kettle structure such as a mixing kettle (first stage) and a transfer kettle (second stage). As the transfer kettle of the latter kettle structure, since it usually also has a corresponding pressure detection and control structure (such as pressure detection control structure 530) inside, it can not only control the solution at the end of the previous kettle structure to always be stable within the required pressure requirement range of the previous structure, but also control the solution between the latter kettle and the next production process to always be stable within the corresponding required pressure requirement range.

[0103] As mentioned above, in other embodiments, the number of mixing kettles can be two to twenty, and two to twenty mixing kettles are used to provide solutions to the transfer kettle in sequence, ensuring that at the corresponding time (usually except for the time when switching the mixing kettle), there is a mixing kettle that can provide the solution to the transfer kettle in time, ensuring the redundancy of the transfer kettle in transferring the processing solution, ensuring the continuity and stability of the next production process, and improving the production efficiency of the system.

[0104] While the transfer kettle continuously transfers the solution to the next production process, the liquid level inside the transfer kettle is maintained within a set range, for example, the liquid level can be maintained at approximately one-half of the volume of the transfer kettle.

[0105] Combined with reference Figure 12 and Figure 13 The lower kettle port 108 is connected to the mixing output control valve 900, and the inlet of the solution input structure 510 is provided with a transfer input control valve 930. The mixing output control valve 900 and the transfer input control valve 930 coordinately control the solution from the mixing kettle to the transfer kettle. The mixing output control valve 900 is connected to the lower kettle port 108 and is used to control the output of the solution. The inlet of the solution input structure 510 is the inlet part for the transfer kettle to receive the solution. The transfer input control valve 930 is set at the inlet of the solution input structure 510 and is used to control the input of the solution. Through the coordinated work of the mixing output control valve 900 and the transfer input control valve 930, the solution is provided from the mixing kettle to the transfer kettle. The opening and closing of each valve are coordinated with each other to ensure that the solution can be transported smoothly and accurately.

[0106] Combined with reference Figure 12 and Figure 13 The lower opening 508 is connected to the transfer output control valve 940, which controls the transfer of the solution from the transfer kettle to the next production process.

[0107] Transfer output control valve 940, connected to lower opening 508, precisely controls the amount and flow rate of solution flowing out of the transfer kettle, ensuring a stable solution for the next production process. This control method helps maintain the continuity and stability of the production process, avoiding solution waste and environmental pollution.

[0108] There are six mixing kettles. The mixing output control valves 900 of each of the three mixing kettles are connected to an electronic four-way ball valve 910, two of which are connected to an electronic three-way ball valve 920, and the electronic three-way ball valve 920 is connected to the transfer input control valve 930 of the solution input structure 510. The electronic four-way ball valves 910 and the electronic three-way ball valves 920 control the transfer of the solution from the corresponding mixing kettle to the transfer kettle. The opening and closing of the electronic multi-way (three-way or four-way) ball valves coordinate the supply of solution. When the solution in a mixing kettle needs to be supplied to the transfer kettle, the corresponding mixing kettle is first selected through the electronic four-way ball valve 910. Then, the electronic three-way ball valve 920 further selects the transfer input control valve 930 that delivers the solution to the solution input structure 510. Finally, the transfer input control valve 930 is opened to allow the solution to be input into the transfer kettle. A first pipe 901 connects the mixed output control valve 900 to the electronic four-way ball valve 910, a second pipe 902 connects the electronic four-way ball valve 910 to the electronic three-way ball valve 920, a third pipe 903 connects the electronic three-way ball valve 920 to the transfer input control valve 930, and the transfer output control valve 940 connects to the fourth pipe 904. The first pipe 901, the second pipe 902, the third pipe 903, and the fourth pipe 904 all have a pipe temperature control structure. Regardless of whether there is solution flowing through the pipe, the pipe temperature control structure is always used to maintain the temperature of each pipe stable. Due to the high stability requirements of the flash spinning solution, in this embodiment, the pipe temperature control structure is always used to maintain the temperature of each pipe stable to prevent solution instability, phase separation, or other problems. Since it is inevitable that there will be no residual solution after flowing through the pipe, various adverse phenomena may occur once the pipe cools down. After cooling, reheating may not re-form the solution, or the stable flow of the solution cannot be guaranteed in time. Therefore, temperature control is required to ensure temperature stability. By maintaining a stable temperature, production problems caused by unstable solutions can be avoided, resulting in long-term production benefits.

[0109] At the same time, the corresponding control valves and ball valves also always maintain stable temperature. Temperature stability can be achieved by using control valves and ball valves with their own temperature control functions, or by setting corresponding valve temperature control structures outside these control valves and ball valves to achieve temperature stability.

[0110] In addition, for Figure 14 and Figure 15 The system shown does not have a corresponding ball valve, so the corresponding control process is simpler. It only needs to control each mixed output control valve 900 and the transfer input control valve 930, coordinate the solution transmission of each branch pipe 905 and the converging pipe 906, and then the solution can be supplied to the next production link.

[0111] In this embodiment, the solution preparation process may include the following steps: a mixing preparation step, a material adding and mixing step, a quantitative mixing step, and a supplying step.

[0112] In this embodiment, the solution continuous transfer process may include the following steps: a transfer preparation step, an initial liquid addition step, and a continuous liquid supply step.

[0113] After the transfer tank completes the transfer preparation step of the continuous solution transfer process, the first mixing tank then proceeds to the solution preparation step. This timing is designed to maximize production coordination and avoid excessive waiting time. The timing for the first mixing tank to initiate the solution preparation process can be set based on this requirement, and the timing for the transfer tank to initiate the continuous solution transfer process also refers to this timing.

[0114] In this embodiment, after the supply step of the solution preparation process is completed in the previous mixing kettle, the inert gas is continued to be introduced into the mixing kettle until the inert gas is transferred to the inside of the transfer kettle, and the supply step of the solution preparation process is performed in the next mixing kettle. Since the inert gas is transferred to the inside of the inert gas, it indicates that all the solutions in the pipeline between the mixing kettle and the transfer kettle are basically completely input into the transfer kettle, which is equivalent to the pipeline being emptied and filled with inert gas. As mentioned above, the pipeline and the corresponding control valve or ball valve always maintain a constant temperature. Therefore, with the help of inert gas, the solution supply process can be repeatedly and stably carried out. This ensures that the output of the solution is easier to control and makes the pipeline less prone to blockage and the like. This inert gas delivery process is continuous, and once the inert gas is delivered to the transfer kettle, it means that the corresponding solution has been fully provided to the transfer kettle, so the introduction of the inert gas can be stopped. This method is also partly due to the fact that each solution formed should not remain for too long. If some of it remains in connecting structures such as pipes and valves, it may need to wait until the next round of solution supply before it can flow from the pipes and other connecting structures into the transfer kettle. However, this waiting time may be too long, and maintaining the stability of the retained solution presents corresponding challenges. The inert gas in the transfer kettle can be reused to function as a pressure transfer station. That is, the transfer pressure detection and control structure 530 of the transfer kettle can adjust the pressure to maintain a stable gas environment, thereby maintaining the stability of the solution supply process and the stability of the transfer process.

[0115] The method provided in this embodiment utilizes multiple mixing kettles to successively carry out the solution preparation process, and supplies the solution to a transfer kettle for stable output and transfer to the next production process, thereby realizing the continuous and stable preparation, supply and transfer of the flash spinning solution.

[0116] The mixing kettle provided in the embodiment of the present invention is connected to the transfer kettle of the next process through a corresponding connection structure, and then the transfer kettle is connected to the next production process. The corresponding next production process includes a corresponding flash spinning process.

[0117] In order to simplify the content, this specification has largely avoided duplication in the composition, properties, functions, principles, effects and advantages of the same or similar structures and method steps between the various embodiments. Therefore, the composition, properties, functions, principles, effects and advantages of the different embodiments of this specification can be referenced and supplemented by each other.

[0118] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. The technical solutions described in the embodiments may be modified, or some or all of the technical features therein may be replaced by equivalents. The technical features designed in different implementation modes may be combined with each other as long as they do not conflict with each other, and the corresponding technical solutions shall not deviate from the scope of protection required by the present invention. All other embodiments obtained based on the embodiments of the present invention without creative work shall fall within the scope of protection of the present invention.

Claims

1. A multi-reactor system for continuously providing flash spinning solution, characterized in that: include: A plurality of mixing kettles, each comprising a mixing kettle body (100), a mixing jacket (200) and a mixing drive device (300); the mixing kettle body (100) having an upper kettle opening (107) and a lower kettle opening (108); the mixing jacket (200) being used to control the temperature of the mixing kettle body (100); the mixing drive device (300) being used to provide hybrid power to the solute and solvent inside the mixing kettle body (100); the mixing kettle further comprising a solvent input structure (110), a solute input structure (120), a mixing pressure detection control structure (130), a mixing temperature detection structure and a mixing liquid level detection structure installed on the mixing kettle body (100); A transfer kettle, comprising a transfer kettle body (500), a transfer jacket (600) and a transfer drive device (700); the transfer kettle has an upper opening (507) and a lower opening (508); the transfer jacket (600) is used to control the temperature of the transfer kettle body (500); the transfer drive device (700) is used to provide balance and transfer power for the solution inside the transfer kettle body (500); the transfer kettle further comprises a solution input structure (510), a transfer pressure detection control structure (530), a transfer temperature detection structure and a transfer liquid level detection structure installed on the transfer kettle body (500); The lower kettle ports (108) of the plurality of mixing kettles are all connected to the inlet of the solution input structure (510) of the transfer kettle in an alternative structure.

2. The multi-vessel system according to claim 1, characterized in that: In the mixing kettle, the solute input structure (120) is located in the mixing kettle body (100), and the solute outlet (123) is close to the longitudinal axis (109) of the mixing kettle body (100); the distance (D) between the solute outlet (123) and the longitudinal axis (109) is one tenth to one third of the cross-sectional radius (R) of the mixing kettle body (100).

3. The multi-vessel system according to claim 2, characterized in that: In the mixing kettle, the height of the solute outlet (123) is located at a position above two-thirds of the height of the mixing kettle body (100); the solvent input structure (110) is located at the solvent outlet (111) of the mixing kettle body (100) and extends to the bottom (100c) of the mixing kettle body (100); the solute outlet (123) has an outlet plane that is obliquely upward toward the longitudinal axis (109).

4. The multi-vessel system according to claim 3, characterized in that: In the mixing kettle, the solute input structure (120) enables the solute outlet (123) to be close to the longitudinal axis (109) of the mixing kettle body (100) through the single-bend structure of the pipeline, and the single-bend structure has a single-bend angle (α) with an angle range of 120 degrees to 165 degrees; the outlet plane of the solute outlet (123) has an angle (β) with the longitudinal axis (109) with an angle range of 15 degrees to 60 degrees; the solute outlet (123) has a sieve hole structure, and the sieve hole structure includes multiple sub-outlets (1231), and the shape of the sub-outlets is polygonal, circular or elliptical; the number of the mixing kettles is two to twenty.

5. The multi-vessel system according to claim 1, characterized in that: In the transfer kettle, the solution input structure (510) is located in the internal space of the transfer kettle body (500), and the solution input port (511) is arranged on the inner wall of the mixing kettle body (100), and the height of the solution input port (511) is located below one-half of the height of the transfer kettle body (500), and the height of the solution input port (511) is located above one-third of the height of the transfer kettle body (500).

6. The multi-vessel system according to claim 5, characterized in that: In the transfer kettle, the transfer driving device (700) comprises a transfer rotating shaft (706) and a transfer stirring blade (708) mounted on the transfer rotating shaft (706); the transfer stirring blade (708) is mounted at the bottom of the transfer rotating shaft (706); the transfer kettle further comprises a temperature control tube (711) sleeved on the transfer rotating shaft (706), and a gap (710) is provided between the temperature control tube (711) and the transfer rotating shaft (706).

7. The multi-vessel system according to claim 6, characterized in that: In the transfer kettle, the height of the top of the temperature control tube (711) is greater than or equal to the maximum liquid level of the solution in the transfer kettle body (500); the inner diameter of the temperature control tube (711) is more than twice the cross-sectional diameter of the transfer rotating shaft (706), and the outer diameter of the temperature control tube (711) is more than 2.5 times and less than 5 times the cross-sectional diameter of the transfer rotating shaft (706); the temperature control tube (711) is fixed to the surface position of the transfer head (704) of the transfer drive device (700) through multiple upper arms (712).

8. The multi-vessel system according to claim 1, characterized in that: The lower kettle port (108) is connected to a mixing output control valve (900); the inlet of the solution input structure (510) is provided with a transfer input control valve (930); and the lower opening (508) of the transfer kettle body (500) is connected to a transfer output control valve (940).

9. The multi-vessel system according to claim 8, characterized in that: There are six mixing kettles, and the mixing output control valves (900) of every three mixing kettles are connected to an electronic four-way ball valve (910), and two electronic four-way ball valves (910) are connected to an electronic three-way ball valve (920), and the electronic three-way ball valve (920) is connected to the transfer input control valve (930) of the solution input structure (510); Alternatively, there are five mixing kettles, the mixing output control valves of two mixing kettles are connected to one electronic three-way ball valve, the mixing output control valves of three mixing kettles are connected to one electronic four-way ball valve, one electronic four-way ball valve and one electronic three-way ball valve are further connected to another electronic three-way ball valve, and the latter electronic three-way ball valve is connected to the transfer input control valve of the solution input structure; Alternatively, there are seven mixing kettles, the mixing output control valves of two mixing kettles are connected to an electronic three-way ball valve, the mixing output control valves of three mixing kettles are connected to an electronic four-way ball valve, one electronic four-way ball valve and two electronic three-way ball valves are further connected to another electronic four-way ball valve, and the latter electronic four-way ball valve is connected to the transfer input control valve of the solution input structure.

10. The multi-vessel system according to claim 9, characterized in that: The mixed output control valve (900) is connected to the electronic four-way ball valve (910) via a first pipe (901), the electronic four-way ball valve (910) is connected to the electronic three-way ball valve (920) via a second pipe (902), the electronic three-way ball valve (920) is connected to the transfer input control valve (930) via a third pipe (903), and the transfer output control valve (940) is connected to a fourth pipe (904); the first pipe (901), the second pipe (902), the third pipe (903), and the fourth pipe (904) all have a pipe temperature control structure; the lengths of the first pipes (901) are equal, and the lengths of the second pipes (902) are equal.

11. The multi-vessel system according to claim 8, characterized in that: The mixed output control valve (900) is connected by a branch pipe (905), and the transfer input control valve (930) is connected by a confluence pipe (906). All the branch pipes (905) are connected to the same position of the confluence pipe (906). The branch pipes (905) are of equal length and have the same shape and size. The branch pipes (905) are of a smoothly curved structure.

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