Dynamic uniform mixing preparation mechanism for casting solution for MOFs (Metal-Organic Frameworks) multifunctional membrane

Abstract

The invention relates to the related technical field of membrane casting liquid processing, and particularly discloses a membrane casting liquid dynamic uniform mixing preparation mechanism for a MOFs multifunctional membrane, the membrane casting liquid dynamic uniform mixing preparation mechanism comprises a kettle body, a material dispersing assembly and a stirring shaft rod, the material dispersing assembly is connected with a mixing cavity formed in the kettle body in an inserted mode, and the material dispersing assembly is correspondingly arranged under a feeding inclined pipe; the stirring shaft rod drives a first paddle frame fixedly connected to the upper end of the stirring shaft rod to rotate and stir in the material dispersing assembly, and powder materials temporarily separated in the material dispersing assembly can be evenly dispersed into the mixing cavity through stirring and shifting. According to the membrane casting liquid dynamic uniform mixing preparation mechanism for the MOFs multifunctional membrane, through an adding mode of slowly and uniformly dispersing a powder material, the phenomenon that the powder material is in contact with a large amount of liquid material to be aggregated and agglomerated at the instant of direct adding is avoided, uniform wetting of the powder material is achieved, in addition, circulating convection intersection is achieved in the preparation stirring process, and the preparation efficiency is improved. A flowing dead zone is avoided, and the use purpose of dynamic uniform mixing is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of casting solution processing, and more particularly to the technical field of casting solution mixing processing, specifically a dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes. Background Technology

[0002] MOFs (metal-organic frameworks) are porous crystalline materials formed by the self-assembly of metal ions or metal clusters with bridging organic ligands through coordination bonds. Due to their high porosity and tunable pore structure, they are widely used in functional thin films such as separation membranes and adsorption membranes. MOF multifunctional membranes, as the name suggests, use MOFs as functional building blocks. In the production of MOF multifunctional membranes, the preparation and processing of the casting solution is one of the key steps. It requires mixing solvent with MOF material powder that can provide porous structure and separation performance, polymer matrix that can provide mechanical strength and film-forming properties, and additives that can adjust porosity and pore size distribution. After proportioning, the casting solution is prepared by uniformly mixing with a mixing device.

[0003] For example, Chinese patent CN113856530B discloses a stirred tank for preparing tetrabromobisphenol A, including a stirred tank body, a cover plate installed on the top of the stirred tank body, and a discharge mechanism installed at the bottom of the stirred tank body. Multiple feed pipes are installed on the cover plate, and a lifting mechanism is fixed on the top of the cover plate. A transmission mechanism is rotatably installed on the lifting end of the lifting mechanism. A drive mechanism is driven to one side of the transmission mechanism. A stirring shaft is driven to the bottom of the transmission mechanism through the inner wall of the bottom of the cover plate. Multiple sets of stirring mechanisms are installed on the outer circumference of the stirring shaft, with three stirring mechanisms per group and arranged in a circumferential pattern.

[0004] Based on the aforementioned patents and in conjunction with existing solutions and actual production and processing applications, current casting solution mixing and stirring equipment still has some problems, such as: The mixing method involved in the above patent involves directly feeding materials such as tetrabromobisphenol A (which is a white powder), n-octanol and water into the mixing vessel from the feed pipe in proportion. The drive mechanism can work with the transmission mechanism to drive the stirring shaft to rotate and perform mixing operations on the materials. The existing mixing methods involved in the preparation of casting solutions for MOFs multifunctional membranes are the same as those in the above-mentioned patent. They involve directly adding MOFs material powder, solvent and polymer matrix into the mixing vessel from the feed inlet and mixing the materials by stirring shaft. However, when mixing powder and liquid, if the powder and liquid materials are directly added into the mixing vessel at the same time, the powder material will come into contact with a large amount of liquid material instantly, making it impossible for the powder material to be evenly dispersed in the liquid material. This results in insufficient wetting of the powder material, causing agglomeration and clumping, which affects the thorough mixing.

[0005] Therefore, we propose a dynamic mixing and preparation mechanism for casting solution of MOF multifunctional membranes to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a dynamic mixing and preparation mechanism for casting liquid for MOFs multifunctional membranes, in order to solve the problem mentioned in the background art that the powder material cannot be uniformly dispersed in the liquid material during preparation and stirring, resulting in insufficient wetting of the powder material, agglomeration and clumping, which affects the mixing uniformity.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes, comprising: The vessel body, the top of which is sealed and fixed with a vessel cover equipped with a feed inclined tube; Also includes: The bulk material assembly is inserted and connected to the mixing chamber opened in the vessel body, and is located directly below the feed inclined pipe. The bottom of the mixing chamber is provided with a feed straight pipe equipped with an automatic feed valve. The stirring shaft, driven by a motor, forms a rotating structure on the vessel lid. The stirring shaft drives the first paddle fixed at its upper end to rotate and stir within the bulk material assembly. This stirring action can evenly disperse the powder material temporarily separated within the bulk material assembly into the mixing chamber. The stirring shaft also drives the second paddle fixed at its lower end to rotate and stir within the mixing chamber, which can mix the evenly dispersed powder material with the liquid material in the mixing chamber.

[0008] Preferably, the bulk material assembly includes a flow guide hood for sealing the opening of the mixing chamber and a bulk material cylinder connected to the lower end of the flow guide hood. The upper end of the flow guide hood is fixedly connected to the vessel lid. The flow guide hood guides the powder material or liquid material into the bulk material cylinder, and the bulk material cylinder temporarily concentrates the powder material therein, thus temporarily separating the powder material from the liquid material.

[0009] Preferably, the vessel body has a circulation chamber surrounding the mixing chamber, and the upper and lower ends of the circulation chamber have an upper opening and a lower opening for connecting the mixing chamber, respectively. The circulation chamber is provided with a pumping mechanism that can pump the powder and liquid mixture inside, so that the mixture located in the lower part of the mixing chamber circulates to the mixture located in the upper part, forming convection and convergence.

[0010] Preferably, the pumping mechanism includes a pumping ring frame that is sealed and slidably connected in the circulation chamber, a valve port that allows the powder and liquid mixture to flow through the pumping ring frame, and a valve plate for controlling the opening and closing of the valve port. The pumping ring frame has valve ports arranged in a circular array with its center as the center, and a valve plate is flipped and connected inside the valve port. The pumping ring frame is provided with a drive mechanism that can operate the valve plate to flip automatically.

[0011] Preferably, the four corners of the pumping ring frame are all fixed with connecting rods that can slide on the lid, and the connecting rods are connected to the output end of the hydraulic cylinder through the ring frame, and the hydraulic cylinder drives the ring frame to form a lifting structure above the lid.

[0012] Preferably, the output end of the hydraulic cylinder is slidably connected to the bracket fixed on the lid, and a fixing bolt for locking the bracket and the output end of the hydraulic cylinder is provided at the sliding connection. The lid is driven by the hydraulic cylinder to form a disassembly structure on the lid body.

[0013] Preferably, the drive mechanism includes a housing fixed in the pumping ring frame, a rack frame for driving the valve plate to flip, and a pawl assembly for locking the rack frame. The rack frame forms a sliding structure in the housing, and the rack frame is meshed with a gear portion opened on the central shaft of the valve plate. A first torsion spring is installed at the flip connection between the valve plate and the pumping ring frame; The claw assembly is composed of a first claw and a second claw that can rotate relative to each other within the housing. A second torsion spring is installed at the rotation connection between the first claw and the second claw. The lower hook portion of the first claw and the lower hook portion of the second claw are respectively connected to two extension plates in the rack frame by a snap-fit ​​method.

[0014] Preferably, the rack frame, together with the first pin fixed to the connecting column therein, forms a synchronous sliding structure within the housing, and a first spring is installed at the sliding connection between the first pin and the housing, and the first pin is connected to the lower cavity wall of the circulation chamber by a pressing manner.

[0015] Preferably, a second pin for unlocking the claw assembly is slidably connected inside the housing, and a second spring is installed at the sliding connection between the second pin and the housing. The second pin is connected to the blocking bracket fixed on the lid by a pressing manner. The second pin is provided with an integrated pressure column, and the two sides of the pressure column are connected to the pushing part in the first claw and the pushing part in the second claw by pushing.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the dynamic mixing and preparation mechanism for casting liquid for MOFs multifunctional membranes avoids the phenomenon of agglomeration and clumping caused by direct contact of powder materials with a large amount of liquid materials during addition by adding powder materials slowly and evenly, thereby achieving uniform wetting of powder materials. In addition, during the preparation and stirring, the circulating convection is realized to avoid the occurrence of flow dead zones and achieve the purpose of dynamic mixing. 1. Liquid materials flow through the strip mesh openings in the bulk material cylinder and concentrate in the mixing chamber. Powder materials cannot pass through the strip mesh openings on their own, thus achieving temporary separation and temporarily concentrating in the bulk material cylinder. After the first paddle rotates inside the bulk material cylinder, it stirs and pushes the powder materials through the strip mesh openings, dispersing them evenly into the liquid materials. This satisfies the purpose of uniformly dispersing the powder materials in the liquid materials during preparation and mixing. This method of slowly and evenly dispersing the powder materials avoids the formation of lumps due to excessively high local concentrations when the powder materials are directly added and come into contact with a large amount of liquid materials. It achieves uniform wetting of the powder materials and effectively improves the mixing uniformity. Furthermore, the first and second paddle frames rotate synchronously driven by the stirring shaft. When the first paddle frame sprinkles the powder material temporarily separated in the bulk cylinder into the liquid material in a uniform manner, the second paddle frame simultaneously stirs the liquid material, which helps the powder material to be more evenly dispersed in the liquid material and helps the powder material to quickly and fully contact the liquid material, effectively improving the mixing efficiency. 2. The upward pumping of the pumping ring causes the powder and liquid mixture in the lower part of the mixing chamber to fill the circulation chamber through the lower opening, and the mixture previously filled in the circulation chamber flows back to the mixture in the upper part of the mixing chamber through the upper opening. This cycle is repeated, with the circulation chamber acting as a flow channel, allowing the mixture in the lower part of the mixing chamber to circulate to the mixture in the upper part. In other words, in the preparation and mixing process, unlike the stable unidirectional flow mode of materials in existing mixing processes, the mixture achieves circulatory convection and convergence, avoiding dead zones in the mixing chamber and achieving the purpose of dynamic mixing. Furthermore, when the pumping ring slides downwards within the circulation chamber, the pressure between the lower cavity wall and the first pin causes the first pin to drive the rack frame to slide synchronously. The meshing between the rack frame and the gear section drives the valve plate to automatically flip and close within the valve port. When the pumping ring slides upwards within the circulation chamber, the pressure between the blocking frame and the second pin causes the second pin to slide, releasing the pawl assembly from the rack frame. The elastic deformation and reset of the first torsion spring and the first spring then drive the valve plate to automatically flip and open within the valve port. Through this linkage structure, the valve plate can be automatically closed when the pumping ring slides downwards and automatically opened when the pumping ring slides upwards, assisting the pumping ring in reciprocating lifting and lowering within the circulation chamber, thus achieving continuous pumping of the mixture within the circulation chamber. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 3 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the vessel body and the bulk material assembly of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 This is a bottom-view three-dimensional structural diagram of the connection between the pumping mechanism and the linkage rod of the present invention; Figure 6 This is a frontal cross-sectional three-dimensional structural diagram of the connection between the circulation chamber and the pumping ring frame of the present invention; Figure 7 This is a top-view three-dimensional structural diagram of the connection between the bracket and the hydraulic cylinder of the present invention; Figure 8 This is a top-view cross-sectional three-dimensional structural diagram of the connection between the pumping ring frame and the drive mechanism of the present invention; Figure 9 This is a side cross-sectional three-dimensional structural diagram of the connection between the housing and the rack frame of the present invention; Figure 10 This is a side cross-sectional perspective view of the connection between the housing and the second pin of the present invention. Figure 11 This is a side-view perspective of the three-dimensional structure of the valve plate and rack frame of the present invention.

[0018] In the diagram: 1. Reactor body; 101. Mixing chamber; 102. Feeding straight pipe; 103. Circulation chamber; 104. Upper port; 105. Lower port; 2. Reactor lid; 201. Feeding inclined pipe; 202. Support; 203. Fixing bolt; 3. Bulk assembly; 301. Flow guide; 302. Bulk cylinder; 4. Stirring shaft; 5. Motor; 6. First paddle frame; 7. Second paddle frame; 8. Pumping mechanism; 9. Pumping ring frame; 10. Valve port ; 11. Valve plate; 1101. Gear assembly; 12. Drive mechanism; 13. Linkage rod; 1301. Ring frame; 14. Hydraulic cylinder; 15. Housing; 16. Rack frame; 17. Claw assembly; 1701. First claw; 1702. Second claw; 18. First torsion spring; 19. Second torsion spring; 20. First pin; 21. First spring; 22. Second pin; 2201. Pressure column; 23. Second spring; 24. Blocking frame. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1: This invention provides a technical solution: a dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes. This addresses the problem that during the preparation and stirring of casting solution for MOFs multifunctional membranes, the powder material cannot be evenly dispersed in the liquid material, resulting in insufficient wetting of the powder material and agglomeration due to excessively high local concentrations, thus affecting thorough mixing. During the feeding operation of the powder and liquid materials in the casting solution (MOFs multifunctional membrane), the powder and liquid materials are first temporarily separated by a dispersing component 3. Then, the powder material temporarily separated in the dispersing component 3 is evenly dispersed into the liquid material by the rotation and stirring of the first paddle 6 within the dispersing component 3. Combined with the rotation and stirring of the second paddle 7, the powder and liquid materials in the casting solution are stirred and mixed.

[0021] This technical solution: Please refer to Figures 1-3 A dynamic mixing and preparation mechanism for casting liquid for MOFs multifunctional membranes includes a vessel body 1. A tripod is fixedly installed at the bottom of the vessel body 1. The tripod is used to vertically place the casting liquid preparation and mixing equipment for MOFs multifunctional membranes at the processing site. The top of the vessel body 1 is sealed and fixedly connected to a vessel cover 2 with a feed inclined pipe 201. It also includes a bulk material assembly 3 and a stirring shaft 4. The bulk material assembly 3 is inserted and connected to the mixing chamber 101 opened in the vessel body 1, and it is located directly below the feed inclined pipe 201. The bottom of the mixing chamber 101 is provided with a feed straight pipe 102 equipped with an automatic feed valve. The stirring shaft 4 is driven by the motor 5 to form a rotating structure on the vessel cover 2. The stirring shaft 4 drives the first paddle frame 6 fixed at its upper end to rotate and stir in the bulk material assembly 3. It can evenly disperse the powder material temporarily separated in the bulk material assembly 3 into the mixing chamber 101 through stirring. The stirring shaft 4 drives the second paddle frame 7 fixed at its lower end to rotate and stir in the mixing chamber 101. It can mix the evenly dispersed powder material with the liquid material in the mixing chamber 101.

[0022] Specifically, in this technical solution, before preparing and stirring the casting solution (MOFs multifunctional membrane), the powder and liquid materials in the casting solution are fed in, according to... Figure 1 , Figure 2 and Figure 3 As shown, the top of the vessel body 1 is sealed and fixed with the vessel cover 2. The feed inlet pipe 201 is integrally set on the upper side wall of the vessel cover 2. There are two feed inlet pipes 201 arranged symmetrically about the vertical central axis of the vessel cover 2. The feed inlet pipe 201 located in front can be used to add powder materials in the casting solution, and the feed inlet pipe 201 located behind can be used to add liquid materials in the casting solution. By setting two feed inlet pipes 201, the powder materials and liquid materials can be added separately. Because the mixing chamber 101 has a cylindrical structure and is located in the center of the vessel body 1, with an open top and an opening, and because the bulk material assembly 3 is inserted into the upper part of the mixing chamber 101, and because the bulk material assembly 3 includes a flow guide shroud 301 and a bulk material cylinder 302, wherein the flow guide shroud 301 has a funnel-shaped structure with a small diameter opening facing downwards and a large diameter opening facing upwards, and the bulk material cylinder 302 has a mesh cylinder with strip-shaped mesh openings. With the structure set up, after the bulk material assembly 3 is assembled with the vessel body 1, the upper end of the flow guide 301 is fixedly connected to the lower side wall of the vessel cover 2 by bolts, and the middle waist of the flow guide 301 is snapped into the upper end of the mixing chamber 101. The large-diameter hood at the upper end of the flow guide 301 covers the opening of the mixing chamber 101, so that the bulk material assembly 3 is directly below the feed inclined pipe 201, that is, the large-diameter hood at the upper end of the flow guide 301 is set to correspond to the feed inclined pipe 201. Since the inlet of the feed inclined tube 201 is sealed with an end cap by bolts, the end caps on both feed inclined tubes 201 need to be disassembled during the feeding operation. First, the liquid material in the casting solution is put into the mixing chamber 101 through the feed inclined tube 201 located at the rear, so that the liquid material flows through the dispersing component 3 and is added into the mixing chamber 101. Then, the powder material in the casting solution is put into the mixing chamber 101 through the feed inclined tube 201 located at the front, so that the powder material is temporarily concentrated in the dispersing component 3 to avoid the powder material from directly contacting a large amount of liquid material at an instant. Because the bulk material cylinder 302 is an integrated structure connected to the small-diameter opening at the lower end of the guide hood 301, and because after being fed through the inclined feed pipe 201, both powder and liquid materials need to pass through the bulk material assembly 3, when the liquid material flows through the bulk material assembly 3, it is guided by the guide hood 301 to enter from the large-diameter opening at the upper end of the guide hood 301, flow down the inclined wall of the guide hood 301 into the bulk material cylinder 302, and then flow through the strip mesh opening in the bulk material cylinder 302. When the powder material falls into the mixing chamber 101, it is guided by the guide hood 301 to enter from the large-diameter opening at the top of the guide hood 301 and flow down the inclined wall of the guide hood 301 into the bulk material cylinder 302. Unlike the feeding method of liquid materials, the powder material will not pass through the strip mesh in the bulk material cylinder 302 on its own, but will be temporarily concentrated in the bulk material cylinder 302. That is, the powder material and the liquid material are temporarily separated in the mixing chamber 101 after feeding.

[0023] Specifically, in this technical solution, during the uniform dispersion operation of the temporarily separated powder material within the bulk material assembly 3, according to... Figure 1 , Figure 2 and Figure 3 As shown, the vertical central axis of the stirring shaft 4 coincides with the vertical central axis of the bulk material assembly 3. After the stirring shaft 4 is installed, it is located on the vertical central axis of the mixing chamber 101. Its upper end extends outward through the center of the lid 2, and its middle part extends outward through the bulk material cylinder 302. Its lower end is inserted into the lower part of the mixing chamber 101. After the motor 5 is installed, it is fixedly installed in the center of the lid 2 with bolts. Its output end is fixedly connected to the upper end of the stirring shaft 4 through a coupling (the coupling is existing technology and is not described in detail in the attached drawings). When the motor 5 is started, it drives the stirring shaft 4 to rotate on the lid 2. Since the first paddle frame 6 is an existing paddle-type mixing paddle, after it is installed, its upper end is sleeved and fixedly connected to the upper end of the mixing shaft 4 with bolts, and its lower end is movably inserted into the material dispersing cylinder 302. When the mixing shaft 4 is driven to rotate, it drives the first paddle frame 6 fixed to its upper end to rotate synchronously in the material dispersing assembly 3. That is, the first paddle frame 6 rotates and stirs the temporarily separated powder material in the material dispersing cylinder 302. After the powder material is stirred, a pushing force is formed. After the temporarily separated powder material in the material dispersing cylinder 302 is stirred and pushed, the powder material passes through the strip mesh in the material dispersing cylinder 302 and is sprinkled onto the liquid material in the mixing chamber 101 in a uniformly dispersed manner.

[0024] Meanwhile, in the above technical solutions, according to Figure 2 and Figure 3 As shown, since the bulk material cylinder 302 has an integrated shaft tube section vertically arranged at its center, and bearings are fixedly snapped at both ends of the shaft tube section, after the bulk material assembly 3 and the stirring shaft 4 are assembled, the shaft tube section of the bulk material cylinder 302, together with the bearings, is movably sleeved on the stirring shaft 4, so that the bulk material assembly 3 does not affect the rotation of the stirring shaft 4, and at the same time can absorb the vibration generated during the rotation of the stirring shaft 4, ensuring the stability of the rotation of the stirring shaft 4.

[0025] Specifically, in this technical solution, during the preparation and stirring of the casting solution (MOFs multifunctional membrane), the powder and liquid materials in the casting solution are mixed. Figure 1 , Figure 2 and Figure 3 As shown, since the second paddle frame 7 is an existing turbine-type stirring paddle, after it is installed, it is sleeved and fixedly connected to the lower end of the stirring shaft 4 by bolts, and it is located in the lower part of the mixing chamber 101. When the stirring shaft 4 is driven to rotate, it drives the second paddle frame 7 fixed to its lower end to rotate synchronously in the mixing chamber 101. That is, the second paddle frame 7 rotates and stirs the liquid material in the mixing chamber 101, which can form a strong radial flow of the liquid material in the mixing chamber 101 and carry out high shear force stirring, so as to promote the uniformly dispersed powder material and the liquid material to mix. In addition, both the first paddle frame 6 and the second paddle frame 7 are driven by the stirring shaft 4, and the two form a synchronous rotation structure. While the powder material is evenly dispersed, it is stirred and mixed with the liquid material, which helps the powder material to quickly and fully contact the liquid material and carry out efficient mixing.

[0026] Meanwhile, in the above technical solutions, according to Figure 1 and Figure 2 As shown, the bottom cavity wall of the mixing chamber 101 is set in a hemispherical structure. Through the hemispherical bottom cavity wall in the mixing chamber 101, the casting liquid prepared and stirred in the mixing chamber 101 can be concentrated and discharged towards the center of the bottom cavity wall along the hemispherical bottom cavity wall when it is discharged. Since the feeding straight pipe 102 is an integrated structure connected to the center of the bottom cavity wall in the mixing chamber 101, and since the opening of the feeding straight pipe 102 is sealed with an automatic feeding valve (the automatic feeding valve is existing technology and is not described in detail in the attached drawings of the specification), after the casting liquid is prepared and stirred, the casting liquid is fed through the feeding straight pipe 102 by opening the automatic feeding valve.

[0027] Meanwhile, in the above technical solutions, according to Figure 1 and Figure 2 As shown, after the lid 2 is installed, it is snapped and fixed to the top of the body 1 with bolts. Two sealing rings are installed from the inside to the outside at the connection between the lid 2 and the body 1. The inner sealing ring is used for sealing between the lid 2 and the cavity opening of the mixing chamber 101, and the outer sealing ring is used for sealing between the lid 2 and the cavity opening of the circulation chamber 103. During the preparation and stirring of the casting solution, the end cap of the feed inclined tube 201 carries a sealing gasket and is fixed to the opening of the feed inclined tube 201 by bolts to seal the feed inclined tube 201. In addition, an automatic discharge valve is installed at the discharge straight tube 102 for its sealing closure. A mechanical seal is installed at the intersection of the stirring shaft 4 and the vessel cover 2 (the mechanical seal is existing technology and is not described in detail in the accompanying drawings). The mechanical seal seals the connection between the stirring shaft 4 and the vessel cover 2 without affecting the rotation of the stirring shaft 4. By sealing the various connections mentioned above, the interior of the vessel body 1 is made into a sealed state. Since the vessel cover 2 can also be provided with a vacuum port for connecting a vacuum pump (both the vacuum port and the vacuum pump are existing technologies and are not described in detail in the accompanying drawings), the interior of the vessel body 1 is vacuumed through the vacuum port, thus achieving the defoaming requirements after the casting solution is prepared and stirred.

[0028] Example 2: Based on Embodiment 1, please refer to the following: Figures 4-11The technical solution shown describes the preparation and mixing of casting solution for MOFs multifunctional membranes. Existing mixing vessels typically use a stirring paddle rotating in one direction to mix materials. This mixing method causes the materials to flow along a specific path within the vessel, resulting in localized flow dead zones. To address the problem that existing mixing vessels cannot achieve circulatory convection and convergence of materials within the vessel, thus failing to achieve dynamic mixing and effectively eliminating flow dead zones, thereby reducing the overall uniformity and efficiency of mixing, the pumping mechanism 8 is driven to slide within the circulation chamber 103. The pumping ring 9 in the pumping mechanism 8 pumps the powder and liquid mixture within the circulation chamber 103. Using the circulation chamber 103 as a flow channel, the mixture located in the lower part of the mixing chamber 101 is circulated to the mixture located in the upper part, allowing the mixture at different locations to form convective convergence within the mixing chamber 101.

[0029] Specifically, in this technical solution, during the sliding operation of the pumping mechanism 8, according to... Figure 4 , Figure 5 and Figure 6 As shown, the pumping mechanism 8 includes a pumping ring frame 9, a valve port 10, and a valve plate 11. The operation of the pumping mechanism 8 to slide within the circulation chamber 103 is that the operation of the pumping ring frame 9 to slide within the circulation chamber 103 is also the operation of the pumping ring frame 9 to slide within the circulation chamber 103. Since connecting frames are welded and fixed on both sides of the vessel body 1, and since the hydraulic cylinders 14 are symmetrically arranged about the vertical central axis of the vessel body 1, after the hydraulic cylinders 14 are installed, they are fixedly installed on the connecting frames in the vessel body 1 by bolts. The output end moves through the connecting frame in the vessel body 1 and extends upward. The output ends of the two hydraulic cylinders 14 are respectively inserted and fixedly connected to the left and right sides of the ring frame 1301 by bolts. Since the ring frame 1301 is horizontally positioned directly above the vessel cover 2, it is connected to the feed inclined pipe 201 on the vessel cover 2 and the motor 5 by a movable sleeve. When the hydraulic cylinders 14 are started to extend and retract, the ring frame 1301 is driven to move up and down above the vessel cover 2. Since there are connecting rods 13 at the front, back, left and right corners of the pumping ring frame 9, the connecting rods 13 are set vertically on the pumping ring frame 9 after installation, and their upper ends can be inserted through the lid 2 and extend outward. Since the ring frame 1301 and the connecting rods 13 are assembled, the upper ends of the four connecting rods 13 are respectively inserted and fixedly connected to the front, back, left and right corners of the ring frame 1301 by bolts. When the ring frame 1301 is driven to move up and down, it drives the four connecting rods 13 to move synchronously, that is, to make the connecting rods 13 slide up and down on the lid 2. Because the longitudinal section of the pumping ring frame 9 is set in an "I" shape, the pumping ring frame 9 is divided into three parts: the longitudinal inner ring wall, the transverse ring wall, and the longitudinal outer ring wall. The transverse ring wall is placed between the longitudinal inner ring wall and the longitudinal outer ring wall. Furthermore, because the four corners of the transverse ring wall in the pumping ring frame 9 are all vertically upward with integrated connecting frames, and because the lower end of the linkage rod 13 is inserted into and fixed to the connecting frame in the pumping ring frame 9 with bolts after installation, when the linkage rod 13 is driven to rise and slide, it drives the pumping ring frame 9 to move synchronously. Since the circulation chamber 103 has a circular structure, it is opened in the vessel body 1 around the mixing chamber 101, and its top is open with a cavity opening. Since the pumping ring 9 is installed horizontally and movably inserted in the circulation chamber 103, its ring center coincides with the ring center of the circulation chamber 103. When driven, the pumping ring 9 moves up and down and slides in the circulation chamber 103. Since sealing rings are fixedly engaged at both ends of the longitudinal inner ring wall and the longitudinal outer ring wall of the pumping ring frame 9, after the pumping ring frame 9 is installed, the longitudinal inner ring wall with the sealing ring is attached to the inner side cavity wall of the circulation cavity 103, and the longitudinal outer ring wall with the sealing ring is attached to the outer side cavity wall of the circulation cavity 103, thus sealing the pumping ring frame 9 with the circulation cavity 103, so that the pumping ring frame 9 remains in a sealed state and slides up and down in the circulation cavity 103.

[0030] Meanwhile, in the above technical solutions, according to Figure 4 and Figure 6 As shown, a mechanical seal is installed at the connection between the connecting rod 13 and the vessel cover 2 (the mechanical seal is prior art and is not described in detail in the accompanying drawings). The mechanical seal seals the connection between the connecting rod 13 and the vessel cover 2 without affecting the sliding of the connecting rod 13, thereby ensuring that the vessel body 1 is in a sealed state for vacuuming.

[0031] Specifically, in this technical solution, the powder and liquid mixture in the circulation chamber 103 is pumped through the pumping ring 9 in the pumping mechanism 8, according to... Figure 4 , Figure 5 and Figure 6 As shown, since the lower port 105 is opened at the lower end of the circulation chamber 103, it is arranged in a ring array with the center of the circulation chamber 103 as the center. The lower port 105 is used for the mutual communication between the lower end of the circulation chamber 103 and the lower end of the mixing chamber 101. The mixture material located in the lower part of the mixing chamber 101 flows through the lower port 105 and fills the circulation chamber 103. Since the valve port 10 has a circular structure, it is arranged in a ring array with the center of the pumping ring frame 9 as the center and is opened through the transverse ring wall of the pumping ring frame 9. The valve port 10 allows the mixed material to flow through the pumping ring frame 9. Since the valve plate 11 has a disc-shaped structure, its size is matched with the size of the valve port 10. The valve plate 11 can control the opening and closing of the valve port 10. In the initial state of the pumping mechanism 8, the valve plate 11 flips and unfolds inside the valve port 10, loses the blocking effect on the valve port 10, and makes the valve port 10 open. When the mixture in the circulation chamber 103 is pumped, the pumping ring 9 is first lowered and slid in the circulation chamber 103. At this time, the valve port 10 is open. The mixture in the circulation chamber 103 will not be pushed down by the pumping ring 9 and will not flow back into the mixing chamber 101 through the lower port 105. The mixture in the circulation chamber 103 will flow through the valve port 10 and remain full in the circulation chamber 103. When the pumping ring 9 slides down in the circulation chamber 103, the drive mechanism 12 comes into contact with the lower wall of the circulation chamber 103. Through the drive mechanism 12, the valve plate 11 is driven to automatically flip and close in the valve port 10, sealing the valve port 10 and making the valve port 10 closed. Next, the pumping ring 9 is driven to slide upward in the circulation chamber 103. At this time, the valve port 10 is closed. The mixture in the circulation chamber 103 is pumped upward by the pumping ring 9, causing the previously filled mixture to move upward in the circulation chamber 103. In addition, after being pumped upward by the pumping ring 9, the mixture located in the lower part of the mixing chamber 101 will flow through the lower port 105 again and refill the circulation chamber 103. Since the upper port 104 is opened at the upper end of the circulation chamber 103, it is arranged in a ring array with the center of the circulation chamber 103 as the center. The upper port 104 is used for the mutual communication between the upper end of the circulation chamber 103 and the upper end of the mixing chamber 101. After the previously filled mixture moves upward in the circulation chamber 103, it flows back to the upper part of the mixing chamber 101 through the upper port 104. When the pumping ring 9 rises and slides in the circulation chamber 103, the drive mechanism 12 is connected to the blocking frame 24. Through the drive mechanism 12, the valve plate 11 is automatically reset, flipped and unfolded in the valve port 10, losing the blockage of the valve port 10, so that the valve port 10 returns to the initial open state. In summary, by driving the pumping ring 9 to reciprocate in lifting and sliding motion, and using the circulation chamber 103 as a flow channel, the mixture located in the lower part of the mixing chamber 101 is circulated to the mixture located in the upper part, forming convection and convergence.

[0032] Meanwhile, in the above technical solutions, according to Figure 4 and Figure 6As shown, the mixture moves upward in the circulation chamber 103 and flows back to the upper part of the mixing chamber 101 through the upper port 104. During the backflow of the mixture, it will pass through the bulk material assembly 3. Since the flow-through hood 301 has flow ports arranged in a ring on its wall with the center as the center, and the flow ports in the flow-through hood 301 are connected to the upper through-hole 104, when the mixed material flows back through the material distribution assembly 3, the mixed material will flow through the flow ports in the flow-through hood 301 and flow along the inclined wall in the flow-through hood 301 into the material distribution cylinder 302. At this time, the residual powder material in the material distribution cylinder 302 will be flushed, and the residual powder material will be carried through the strip mesh in the material distribution cylinder 302 to the upper part of the mixed material in the mixing chamber 101 to participate in the stirring and mixing.

[0033] Specifically, in this technical solution, the valve plate 11 is automatically flipped and closed via the drive mechanism 12, according to... Figure 6 , Figure 8 , Figure 9 and Figure 11 As shown, the drive mechanism 12 is placed inside the longitudinal inner ring wall of the pumping ring frame 9. The drive mechanism 12 includes a housing 15, a rack frame 16, and a claw assembly 17. The housing 15 has an upper shell cavity, a middle shell cavity, and a lower shell cavity in sequence from top to bottom. Since the first pin 20 is set in a "nail" shape, it is divided into an upward-facing nail tail part and a downward-facing nail head part. After the first pin 20 is installed, the nail tail part is movably locked in the lower shell cavity of the housing 15, and the nail head part moves through the lower shell cavity wall of the housing 15 and the lower side of the longitudinal inner ring wall of the pumping ring frame 9 in sequence, and is set in a downward-extending state. When the pumping ring frame 9 slides down in the circulation cavity 103, the drive mechanism 12 is in contact with the lower cavity wall of the circulation cavity 103. That is, the first pin 20 is connected to the lower cavity wall of the circulation cavity 103 by pressing. After being pushed, the first pin 20 retracts and slides in the lower shell cavity of the housing 15. Because an integrated connecting column is vertically installed at the middle position of the lower end of the rack frame 16, after the rack frame 16 is installed, the connecting column moves from the middle cavity of the housing 15 to the lower cavity of the housing 15. Also, after the first pin 20 is installed, the tail part of the pin is sleeved and fixedly connected to the connecting column in the rack frame 16 by bolts. Furthermore, because the distance that the first pin 20 extends from the longitudinal inner ring wall in the pumping ring frame 9 is equal to the maximum sliding distance of the rack frame 16, after the first pin 20 is pushed and retracted, it drives the rack frame 16 to move synchronously. Since a first spring 21 is installed at the sliding connection between the first pin 20 and the housing 15, the first spring 21 is placed in the lower cavity of the housing 15 after being installed, and is movably sleeved on the connecting column in the rack frame 16. One end of the spring 21 presses against the lower cavity wall of the housing 15, and the other end presses against the tail of the first pin 20. After the first pin 20 is pushed and slids, the first spring 21 is squeezed and undergoes elastic deformation. Because the rack frame 16 is set in a square frame structure, after the rack frame 16 is installed, it is movably locked in the middle cavity of the housing 15 and can only slide linearly. After the rack frame 16 moves synchronously with the first pin 20, the rack frame 16 slides upward in the middle cavity of the housing 15. Since the side of the valve plate 11 facing the longitudinal inner ring wall of the pumping ring frame 9 is the inward side, and the side facing the longitudinal outer ring wall of the pumping ring frame 9 is the outward side, both the inward and outward middle parts of the valve plate 11 are provided with an integrated shaft. A gear part 1101 is provided on the inward shaft of the valve plate 11. The center of the gear part 1101 coincides with the axis of the shaft of the valve plate 11. Since the rack frame 16 is connected to the inward shaft of the valve plate 11 through its frame cavity in a movable through manner, one side cavity wall of the frame cavity of the rack frame 16 has a rack-like structure. After the rack frame 16 is assembled with the valve plate 11, the gear part 1101 in the valve plate 11 meshes with the rack-like cavity wall on one side of the rack frame 16. After the rack frame 16 is driven to slide upward, the meshing action between the rack frame 16 and the gear part 1101 drives the shaft of the valve plate 11 to rotate. Since the housing 15 is installed and snapped into the inner longitudinal ring wall of the pumping ring frame 9 by bolts, and its middle part is connected to the inner side shaft of the valve plate 11 by a movable sleeve, and since bearings are fixedly snapped into both the inner side shaft and the outer side shaft of the valve plate 11, the valve plate 11 is installed and movably snapped into the valve port 10, and the outer side shaft with bearing is movably inserted into the outer longitudinal ring wall of the pumping ring frame 9, and the inner side shaft with bearing is movably inserted into the inner longitudinal ring wall of the pumping ring frame 9, and the inner side shaft with bearing is movably inserted into the middle shell cavity wall of the housing 15, the valve plate 11 is positioned in a movable state in the valve port 10. After the shaft of the valve plate 11 is driven to rotate, the valve plate 11 automatically flips and closes in the valve port 10. Since a first torsion spring 18 is installed at the flip connection between the valve plate 11 and the pumping ring frame 9, the first torsion spring 18 is movably sleeved on the outer shaft of the valve plate 11 after being installed. One end of the first torsion spring 18 is engaged with the outer shaft of the valve plate 11, and the other end of the first torsion spring 18 is engaged with the longitudinal outer ring wall of the pumping ring frame 9. After the shaft of the valve plate 11 is driven to rotate, the first torsion spring 18 is subjected to force and undergoes elastic deformation.

[0034] Meanwhile, in the above technical solutions, according to Figure 8As shown, a sealing sleeve is provided at the point where the nail head of the first pin 20 intersects with the longitudinal inner ring wall of the pumping ring frame 9, and the sealing sleeve on the first pin 20 is engaged with the lower end of the housing 15 and the lower side of the longitudinal inner ring wall of the pumping ring frame 9, so as to seal the first pin 20 and the pumping ring frame 9.

[0035] Meanwhile, in the above technical solutions, according to Figure 8 As shown, sealing rings are snapped onto both the inner and outer shafts of the valve plate 11. The sealing ring on the inner shaft seals the connection between the inner shaft and the longitudinal inner ring wall of the pumping ring frame 9, while the sealing ring on the outer shaft seals the connection between the outer shaft and the longitudinal outer ring wall of the pumping ring frame 9.

[0036] Meanwhile, in the above technical solutions, according to Figure 5 and Figure 6 As shown, since the height of the longitudinal inner ring wall in the pumping ring frame 9 is greater than the diameter of the valve plate 11, when the lower side of the longitudinal inner ring wall in the pumping ring frame 9 contacts the lower cavity wall of the circulation chamber 103 and pushes the first pin 20, the valve plate 11 does not contact the lower cavity wall of the circulation chamber 103, thus not affecting the flipping and rotation of the valve plate 11.

[0037] Specifically, in this technical solution, the claw assembly 17 automatically locks the slid-out rack frame 16, according to... Figure 9 , Figure 10 and Figure 11 As shown, the chuck assembly 17 is positioned directly above the rack frame 16 and within the central cavity of the housing 15. Since an integrated shaft is vertically mounted within the central cavity of the housing 15, and the chuck assembly 17 is composed of a first chuck 1701 and a second chuck 1702, the first chuck 1701 has a "V"-shaped structure. Its upper chuck body is an inclined pushing part, and its lower chuck body is an inclined hooking part. After the first chuck 1701 is installed, its corner is movable. The shaft is mounted on the housing 15 to form a rotating structure. The pushing part at its upper end moves from the middle cavity of the housing 15 to the upper cavity of the housing 15, so that the first claw 1701 is positioned in a movable state within the housing 15. Since the overall structure of the second claw 1702 is the same as that of the first claw 1701, and the placement method of the second claw 1702 is the same as that of the first claw 1701, the second claw 1702 is also positioned in a movable state within the housing 15. Since both sides of the upper end of the rack frame 16 are vertically provided with integrated extension plates, and since after the rack frame 16 is assembled with the claw assembly 17, the hook parts at the lower end of the first claw 1701 and the hook parts at the lower end of the second claw 1702 are movably inserted between the two extension plates in the rack frame 16, and since a second torsion spring 19 is installed at the flip connection between the first claw 1701 and the second claw 1702, the second torsion spring 19 is movably sleeved on the shaft of the housing 15 after being placed, one end of which is engaged with the first claw 1701 and the other end of which is engaged with the second claw 1702, in the initial state of the rack frame 16, the hook parts at the lower end of the first claw 1701 and the hook parts at the lower end of the second claw 1702 respectively press against the two extension plates of the rack frame 16, at this time, the second torsion spring 19 undergoes elastic deformation under force; Because the rack frame 16 has slots on its extension plates, when the rack frame 16 is driven to slide upward, the hook parts of the first claw 1701 and the second claw 1702 slide along the two extension plates of the rack frame 16 respectively. After the rack frame 16 is driven to slide upward, the hook parts of the first claw 1701 and the second claw 1702 correspond to the slots on the two extension plates of the rack frame 16 respectively. The elastic deformation of the second torsion spring 19 resets the rack frame 16, causing the first claw 1701 and the second claw 1702 to rotate relative to each other in the middle cavity of the housing 15. The lower hook parts of the first claw 1701 and the lower hook parts of the second claw 1702 are engaged with the two extension plates of the rack frame 16 respectively, that is, the rack frame 16 is automatically locked after sliding.

[0038] Specifically, in this technical solution, the valve plate 11 is automatically flipped and opened via the drive mechanism 12, according to... Figure 6 , Figure 8 , Figure 9 and Figure 10 As shown, the second pin 22 is set in a "nail" shape, divided into a downward-facing tail part and an upward-facing head part. After the second pin 22 is installed, the tail part is movably locked in the upper cavity of the shell seat 15, and the head part moves through the upper wall of the upper cavity of the shell seat 15 and the upper side of the longitudinal inner ring wall of the pumping ring 9 in sequence, and is set in an upward-extending state. After the blocking frame 24 is installed, it is inserted into the cavity opening of the circulation cavity 103, and it is fixedly connected to the lower side of the lid 2 by bolts. When the pumping ring 9 rises and slides in the circulation cavity 103, the drive mechanism 12 is connected to the blocking frame 24. That is, the second pin 22 and the blocking frame 24 are connected by pressing. After the second pin 22 is pushed, it retracts and slides in the upper cavity of the shell seat 15. Since a second spring 23 is installed at the sliding connection between the second pin 22 and the housing 15, the second spring 23 is placed in the upper cavity of the housing 15 after being installed. One end of the spring 23 presses against the upper cavity wall of the housing 15, and the other end presses against the tail of the second pin 22. After the second pin 22 is driven to contract and slide, the second spring 23 is compressed and undergoes elastic deformation (the second spring 23 returns to its original position by its own elastic deformation, driving the second pin 22 to extend and return to its original position). Since the first claw 1701 and the second claw 1702 are arranged in opposite directions, they form an "X" shape. Since the distance that the second pin 22 extends from the inner longitudinal ring wall of the pumping ring 9 is equal to the maximum displacement distance of the pressure column 2201, and since the pressure column 2201 is vertically and downwardly arranged at the center of the tail of the second pin 22, the lower end of the pressure column 2201 is hemispherical and is directly above the intersection of the pushing part in the first claw 1701 and the pushing part in the second claw 1702. When the second pin 22 is driven to retract and slide, it drives the pressure column 2201 to move synchronously, so that the two sides of the hemispherical end of the pressure column 2201 are respectively attached to the pushing part in the first claw 1701 and the pushing part in the second claw 1702 for sliding and pushing, and drive the first claw 1701 and the second claw 1702 to flip relative to each other for a reset movement. When the first claw 1701 and the second claw 1702 are reset and flipped, the second torsion spring 19 is subjected to force again and undergoes elastic deformation, and the lower hook part of the first claw 1701 and the lower hook part of the second claw 1702 lose their engagement with the two extension plates in the rack frame 16, that is, the lock on the rack frame 16 is automatically released. When the rack frame 16 is unlocked, the elastic deformation of the first spring 21 resets the first pin 20, causing the rack frame 16 to slide back to its original position. In conjunction with the elastic deformation of the first torsion spring 18, the central shaft of the valve plate 11 is driven to rotate back to its original position. This, along with the meshing action between the rack frame 16 and the gear part 1101, causes the valve plate 11 to automatically flip and open within the valve port 10.

[0039] Meanwhile, in the above technical solutions, according to Figure 8 As shown, a sealing sleeve is provided at the point where the nail head of the second pin 22 intersects with the longitudinal inner ring wall of the pumping ring frame 9, and the sealing sleeve on the second pin 22 is engaged with the upper end of the housing 15 and the upper side of the longitudinal inner ring wall of the pumping ring frame 9, so as to seal the second pin 22 and the pumping ring frame 9.

[0040] Meanwhile, in the above technical solutions, according to Figure 5 and Figure 6As shown, since the height of the longitudinal inner ring wall in the pumping ring frame 9 is greater than the diameter of the valve plate 11, when the upper side of the longitudinal inner ring wall in the pumping ring frame 9 contacts the blocking frame 24 and pushes the second pin 22, the valve plate 11 cannot contact the blocking frame 24, thus not affecting the flipping and rotation of the valve plate 11.

[0041] Specifically, in this technical solution, during the disassembly operation of the inlet lid 2, according to... Figure 4 , Figure 5 and Figure 7 As shown, the maximum distance extended by the output end of the hydraulic cylinder 14 is greater than the height of the vessel body 1. Since the bracket 202 is symmetrically arranged about the vertical central axis of the vessel cover 2, it is welded and fixed to the vessel cover 2 after installation, and its end is movably connected to the output end of the hydraulic cylinder 14. Since a fixing bolt 203 is provided at the sliding connection between the bracket 202 and the output end of the hydraulic cylinder 14, the fixing bolt 203 is threaded to the end of the bracket 202 after installation, and it is connected to the output end of the hydraulic cylinder 14 by a snap-fit ​​method. When the operating ring frame 1301 moves up and down, the fixing bolt 203 is loosened by screwing to release the lock between the output end of the hydraulic cylinder 14 and the bracket 202. When the output end of the hydraulic cylinder 14 moves in extension and retraction, the output end of the hydraulic cylinder 14 slides on the bracket 202. In addition, when disassembling the lid 2 from the body 1, tighten the fixing bolt 203 to lock the output end of the hydraulic cylinder 14 to the bracket 202. When the output end of the hydraulic cylinder 14 moves in extension and retraction, it no longer drives the ring frame 1301 to move, but drives the lid 2 to move. After loosening the bolts between the lid 2 and the body 1, the lid 2, carrying the bulk material assembly 3 and the pumping mechanism 8, is detached from the body 1 for easy cleaning.

[0042] This is the entire working process of the dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention; the contents not described in detail in this specification belong to the prior art known to those skilled in the art; in addition, the directional terms such as up, down, left, right, front, and back in the text only represent their relative positions and not absolute positions.

[0044] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes, comprising: The top of the vessel body (1) is sealed and fixed with a vessel cover (2) having a feed inlet pipe (201). Its characteristic is that it further includes: Bulk assembly (3), the bulk assembly (3) is inserted and connected to the mixing chamber (101) opened in the vessel body (1), and it is located directly below the feed inclined pipe (201). The bottom of the mixing chamber (101) is provided with a feed straight pipe (102) equipped with an automatic feed valve. The stirring shaft (4) is driven by the motor (5) to form a rotating structure on the lid (2). The stirring shaft (4) drives the first paddle frame (6) fixed at its upper end to rotate and stir in the bulk material assembly (3). The stirring shaft (4) can evenly disperse the powder material temporarily separated in the bulk material assembly (3) into the mixing chamber (101) by stirring. The stirring shaft (4) drives the second paddle frame (7) fixed at its lower end to rotate and stir in the mixing chamber (101). The evenly dispersed powder material can be stirred and mixed with the liquid material in the mixing chamber (101).

2. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes according to claim 1, characterized in that: The bulk material assembly (3) includes a flow guide (301) for sealing the opening of the mixing chamber (101) and a bulk material cylinder (302) connected to the lower end of the flow guide (301). The upper end of the flow guide (301) is fixed to the lid (2). The flow guide (301) guides the powder material or liquid material into the bulk material cylinder (302), and the bulk material cylinder (302) temporarily concentrates the powder material therein, thus temporarily separating the powder material from the liquid material.

3. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membranes according to claim 1, characterized in that: The vessel body (1) is provided with a circulation chamber (103) surrounding the mixing chamber (101), and the upper end and lower end of the circulation chamber (103) are respectively provided with an upper opening (104) and a lower opening (105) for connecting the mixing chamber (101). The circulation chamber (103) is provided with a pumping mechanism (8) that can pump the powder and liquid mixture inside, so that the mixture located in the lower part of the mixing chamber (101) is circulated to the mixture located in the upper part, forming convection and convergence.

4. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 3, characterized in that: The pumping mechanism (8) includes a pumping ring frame (9) that is sealed and slidably connected in the circulation chamber (103), a valve port (10) that allows the powder and liquid mixture to flow through the pumping ring frame (9), and a valve plate (11) for controlling the opening and closing of the valve port (10). The pumping ring frame (9) has valve ports (10) arranged in a ring array with its center as the center, and the valve plate (11) is flipped and connected inside the valve port (10). The pumping ring frame (9) is provided with a drive mechanism (12) that can operate the valve plate (11) to flip automatically.

5. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 4, characterized in that: The pumping ring frame (9) has four fixed connecting rods (13) at its front, back, left, and right corners that can slide on the lid (2). The connecting rods (13) are connected to the output end of the hydraulic cylinder (14) through the ring frame (1301). The hydraulic cylinder (14) drives the ring frame (1301) to form a lifting structure above the lid (2).

6. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 5, characterized in that: The output end of the hydraulic cylinder (14) is connected to the bracket (202) fixed on the lid (2) in a sliding manner, and a fixing bolt (203) for locking between the bracket (202) and the output end of the hydraulic cylinder (14) is provided at the sliding connection. The lid (2) is driven by the hydraulic cylinder (14) to form a disassembly structure on the body (1).

7. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 4, characterized in that: The drive mechanism (12) includes a housing (15) fixed in the pumping ring frame (9), a rack frame (16) for driving the valve plate (11) to flip, and a claw assembly (17) for locking the rack frame (16). The rack frame (16) forms a sliding structure in the housing (15), and the rack frame (16) is meshed with a gear part (1101) opened on the central shaft of the valve plate (11). A first torsion spring (18) is installed at the flip connection between the valve plate (11) and the pumping ring frame (9). The claw assembly (17) is composed of a first claw (1701) and a second claw (1702) that can flip relative to each other within the housing (15). A second torsion spring (19) is installed at the flip connection of the first claw (1701) and the second claw (1702). The lower hook of the first claw (1701) and the lower hook of the second claw (1702) are respectively connected to the two extension plates in the rack frame (16) by a snap-fit ​​method.

8. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 7, characterized in that: The rack frame (16) together with the first pin (20) fixed on the connecting column therein forms a synchronous sliding structure in the housing (15), and a first spring (21) is installed at the sliding connection between the first pin (20) and the housing (15). The first pin (20) is connected to the lower cavity wall of the circulation cavity (103) by pressing.

9. The dynamic mixing and preparation mechanism for casting solution of MOFs multifunctional membrane according to claim 7, characterized in that: The housing (15) is slidably connected to a second pin (22) for unlocking the claw assembly (17), and a second spring (23) is installed at the sliding connection between the second pin (22) and the housing (15). The second pin (22) is connected to the blocking bracket (24) fixed on the lid (2) by pressing. The second pin (22) is provided with an integrated pressure column (2201), and the two sides of the pressure column (2201) are connected to the pushing part in the first claw (1701) and the pushing part in the second claw (1702) by pushing.

Images