Precursor mixing device for aerogel preparation

Abstract

The invention relates to the technical field of aerogel preparation, in particular to a precursor mixing device for aerogel preparation. Comprising a rotating rod, the rotating rod is fixedly connected with spring telescopic pieces arranged at intervals in the circumferential direction, the telescopic ends of the spring telescopic pieces are rotationally connected with first rotating shafts, and the fixed parts of the spring telescopic pieces are rotationally connected with second rotating shafts; the elastic plates are fixedly connected between the adjacent first rotating shafts and the adjacent second rotating shafts respectively, the spring telescopic part is provided with symmetrically distributed fixing rods, connecting parts are installed between the fixing rods and the adjacent elastic plates, and the fixing rods, the adjacent connecting parts and the adjacent elastic plates jointly form a spoon-shaped structure. According to the invention, the spoon-shaped structure is used for promoting the flowing of the solution at the liquid level and reducing the flowing intensity of the solution, so that the probability that air is blended into the solution is reduced, the difficulty degree during subsequent treatment is reduced, and the aerogel production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aerogel preparation, and in particular to a precursor mixing device for aerogel preparation. Background Art

[0002] The existing industrial preparation of aerogels usually adopts the sol-gel method. The specific process of the sol-gel method is: first, common metal alkoxides (such as tetraethyl orthosilicate, etc.) are mixed into appropriate alcohol solvents (such as methanol, ethanol and isopropanol, etc.). The mixed solution is generally called a precursor solution. The precursor solution is then placed in a reactor, and water and an alkaline (or acidic) catalyst are sprayed into the reactor to cause the substances in the precursor solution to undergo hydrolysis and condensation reactions to gradually generate a sol-like precursor sol. The sol is then discharged from the reactor and the sol is aged to form a high-density gel. Finally, the gel is subjected to supercritical drying and other treatments to make an aerogel. Because the existing reactors generally adopt a spray structure for adding drugs, the substances on the surface of the solution in the reactor react more quickly, and the generated sol has a certain viscosity. When the stirring device in the reactor stirs and mixes the solution therein, the following problems generally exist: because the sol component in the solution gradually increases, the stirring efficiency required by the stirring device when driving the solution to mix gradually increases with time, otherwise the solution will not be mixed in time, and the density of the produced sol will be uneven, which will ultimately affect the quality of the produced aerogel. When the stirring efficiency of the stirring device is high, it is easy to cause the air in the reactor to mix into the sol. Before the sol is aged, it is necessary to use an additional vacuum exhaust device to discharge the mixed gas in the sol, otherwise it will also affect the quality of the produced aerogel, which will undoubtedly increase the cost of producing aerogel and restrict the development of aerogel production technology. Summary of the invention

[0003] In order to overcome the disadvantage that when the stirring efficiency of the existing stirring device is high, gas is mixed into the solution, resulting in high cost for subsequent treatment of the sol, the present invention provides a precursor mixing device for preparing aerogel.

[0004] The technical solution of the present invention is: a precursor mixing device for preparing aerogel, comprising: A kettle body, wherein the kettle body is fixedly connected to a motor, the kettle body is rotatably connected to a rotating shaft, and the rotating shaft and the output shaft of the motor are driven by a gear set; A sliding ring is slidably connected to the rotating shaft, the sliding ring is fixedly connected to a fixed shell arranged at intervals in the circumferential direction, the fixed shell is rotatably connected to a rotating rod, the rotating rod is fixedly connected to a spring telescopic member arranged at intervals in the circumferential direction, the telescopic end of the spring telescopic member is rotatably connected to the first rotating shaft, and the fixed part of the spring telescopic member is rotatably connected to the second rotating shaft; The number of elastic plates is equal to the number of the spring telescopic members, and they are respectively fixed between the adjacent first rotating shafts and the adjacent second rotating shafts. A symmetrically distributed fixing rod is installed between the fixing portion of the spring telescopic member and its telescopic end. A connecting member is installed between the fixing rod and the adjacent elastic plate. The fixing rod, the adjacent connecting member and the adjacent elastic plate together form a spoon-shaped structure. The driving assembly is arranged in the kettle body and is used for driving the rotating rod to revolve and rotate.

[0005] Furthermore, a floating member is fixedly connected to the bottom of the sliding ring, and the density of the floating member is less than the density of the sol.

[0006] Furthermore, the driving assembly includes: A fixed column is fixedly connected to the bottom of the kettle body, the upper part of the fixed column is splined with a spline gear, the spline gear is rotatably connected to the sliding ring, the rotating rod is provided with a connecting shaft, the connecting shaft is rotatably connected to the sliding ring, and the connecting shaft and the spline gear are driven by a helical gear set; There are several fixed gears, all of which are fixedly connected to the fixed column in a longitudinal interval manner. The rotating shaft is rotatably connected with stirring members distributed at intervals. The stirring members and the adjacent fixed gears are driven by a bevel gear set.

[0007] Furthermore, the number of teeth of the helical gear on the connecting shaft is not less than the number of teeth of the spline gear.

[0008] Furthermore, it also includes: The number of the adjusting mechanisms is the same as that of the fixed shells, and they are respectively arranged on adjacent rotating rods, and are used to adjust the bending degree of the adjacent elastic plates. The adjusting mechanisms include: The connecting ropes are the same in number as the spring telescopic parts, and are respectively fixed to the telescopic ends of the adjacent spring telescopic parts. The rotating rod is slidably connected to sliding blocks arranged at intervals in the circumferential direction. The number of the sliding blocks is the same as the number of the spring telescopic parts. The spring telescopic parts are fixed to the adjacent connecting ropes. The fixed shell is provided with a slide groove, and the sliding block slides in the slide groove of the adjacent fixed shell. The swing assembly is arranged on the fixed shell and is used to control the direction of the protrusion of the adjacent elastic plate.

[0009] Furthermore, the elastic plate and the fixing rod are both made of elastic alloys, the fixing portion and the telescopic end of the spring telescopic member are respectively fixedly connected to the two ends of the adjacent fixing rod, the connecting member can be stretched and deformed, and the two together with the adjacent elastic plate form a deformable spoon-shaped structure.

[0010] Furthermore, the maximum length of the spring expansion member is greater than the maximum length of the elastic plate.

[0011] Furthermore, the upper slide groove of the fixed shell is composed of two sections of annular slide grooves and two sections of V-shaped slide grooves which are interconnected.

[0012] Furthermore, the swing assembly includes: The number of extrusion rods is the same as the number of the spring expansion and contraction parts, and they are respectively slidably connected to the adjacent spring expansion and contraction parts. The second rotating shaft is provided with an inclined sliding groove, and the extrusion rod is extruded and matched with the adjacent inclined sliding groove. A first torsion spring is provided between the second rotating shaft and the fixing part of the adjacent spring expansion and contraction part. The extrusion ring is fixedly connected to the outer side of the adjacent fixed shell, and the extrusion rod is extrusion-matched with the extrusion ring.

[0013] Furthermore, it also includes: The number of elastic telescopic rods is the same as the number of the fixed shells, and they are respectively fixed to one side of the outside of the sliding ring close to the fixed shell. The telescopic end of the elastic telescopic rod is fixed with a wedge block, and the rotating rod is fixed with limit blocks arranged at circumferential intervals. The limit blocks are squeezed and matched with adjacent wedge blocks. The number of the limit blocks is the same as the number of the spring telescopic parts. The rotating rod is rotatably connected to the adjacent connecting shaft, and a second torsion spring is fixed between the rotating rod and the adjacent connecting shaft.

[0014] The present invention has at least the following beneficial effects: 1. The present invention promotes the flow of solution at the liquid surface through the spoon-shaped structure, while reducing the intensity of the solution flow, thereby reducing the probability of air being incorporated into the solution, reducing the difficulty of subsequent processing, and reducing the cost of producing aerogels.

[0015] 2. The present invention changes the direction of the concave surface of the spoon-shaped structure when the spoon-shaped structure rotates underwater, so that when the spoon-shaped structure rotates toward the water surface, it can still drive the lower solution and the water surface solution to exchange with each other, thereby improving the mixing efficiency between the solution on the water surface and the lower solution.

[0016] 3. The present invention controls the spoon-shaped structure to remain stationary on the water surface when the spoon-shaped structure just sinks into the water surface, so as to ensure that the spoon-shaped structure only attracts liquid on the water surface, thereby improving the effectiveness of the exchange between the liquid on the water surface and the liquid below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the motor and the rotating shaft of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the kettle body and the rotating shaft of the present invention; Figure 4 It is a cross-sectional view of the sliding ring, the fixed shell and the floating member of the present invention; Figure 5 It is a cross-sectional view of the sliding ring, the fixed housing and the spring expansion member of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the elastic plate, the fixing rod and the connecting member of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the annular chute and the V-shaped chute of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the spring expansion member, the elastic plate and the extrusion rod of the present invention; Fig. 9 For the present invention Figure 5 Enlarged view of point A in the middle.

[0018] Marked in the figure: 1-kettle body, 2-motor, 3-rotating shaft, 4-sliding ring, 41-fixed shell, 42-floating part, 5-rotating rod, 6-spring telescopic part, 61-first rotating shaft, 62-second rotating shaft, 7-elastic plate, 8-fixed rod, 9-connecting part, 10-fixed column, 11-spline gear, 12-connecting shaft, 13-fixed gear, 14-stirring part, 15-connecting rope, 16-sliding block, 161-annular slide groove, 162-V-shaped slide groove, 17-extrusion rod, 171-inclined slide groove, 18-extrusion ring, 19-elastic telescopic rod, 20-limiting block. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope and application scope of the present invention are not limited.

[0020] Because when the stirring device in the reactor stirs the precursor solution, in order to ensure the mixing efficiency, the stirring efficiency of the stirring device is usually improved, which can easily cause the air in the reactor to be mixed into the sol during the stirring process. Before aging the sol, the staff needs to use an additional vacuum exhaust device to discharge the mixed gas in the sol, otherwise it will affect the quality of the aerogel production, resulting in an increase in the cost of aerogel production, which will restrict the development of aerogel production technology.

[0021] A precursor mixing device for aerogel preparation, such as Figure 1-Figure 6As shown, it includes: a kettle body 1, the kettle body 1 is fixedly connected to a motor 2, the kettle body 1 is rotatably connected to a rotating shaft 3, the rotating shaft 3 and the output shaft of the motor 2 are driven by a gear set; a sliding ring 4 is slidably connected to the rotating shaft 3, the sliding ring 4 is fixedly connected to a fixed shell 41 arranged at intervals in the circumferential direction, the fixed shell 41 is rotatably connected to a rotating rod 5, the rotating rod 5 is fixedly connected to a spring telescopic member 6 arranged at intervals in the circumferential direction, the telescopic end of the spring telescopic member 6 is rotatably connected to a first rotating shaft 61, and the fixed part of the spring telescopic member 6 is rotatably connected to a second rotating shaft 62; elastic plates 7, the number of which is equal to the number of spring telescopic members 6, respectively fixed between adjacent first rotating shafts 61 and adjacent second rotating shafts 62, symmetrically distributed fixed rods 8 are installed between the fixed part and the telescopic end of the spring telescopic member 6, a connecting member 9 is installed between the fixed rod 8 and the adjacent elastic plate 7, and the fixed rod 8, the adjacent connecting member 9 and the adjacent elastic plate 7 together form a spoon-shaped structure; a driving assembly is arranged in the kettle body 1, and is used to drive the rotating rod 5 to revolve and rotate.

[0022] Furthermore, a floating member 42 is fixedly connected to the bottom of the sliding ring 4 , and the density of the floating member 42 is less than the density of the sol.

[0023] In the above scheme, the kettle body 1 is provided with a feed inlet and a discharge port, and a spray module for spraying water and catalyst into the kettle body 1 is provided on the upper side of the kettle body 1, the spray module and the motor 2 are electrically connected to the control terminal, and the speed of the output shaft of the motor 2 is 50r / min; the spring telescopic member 6 is an n-type telescopic rod, which has two mutually fixed parts and two mutually fixed telescopic ends, so that the spring telescopic member 6 can stably withstand the deformation force of the adjacent elastic plate 7. In this scheme, the spring telescopic member 6 is regarded as a fixed structure, and its telescopic end will not extend or retract; the elastic plate 7, the fixed rod 8 and the connecting member 9 together form a spoon-shaped structure, the buoyancy of the floating member 42 is greater than the gravity of the sliding ring 4, the rotating rod 5 and other components, which is used to ensure that the sliding ring 4, the rotating rod 5 and other components are always located at the liquid surface position, and the bottom surface of the spoon-shaped structure is not higher than the lower side surface of the floating member 42, so that the spoon-shaped structure formed by the elastic plate 7 and the two adjacent connecting members 9 can smoothly collect the liquid at the liquid surface, thereby promoting the circulation and replacement of the liquid at the liquid surface position.

[0024] The working principle of the above scheme is as follows: when the staff needs to produce aerogel precursor, the raw materials are first added into the kettle body 1 through the feed port, and then the staff starts the motor 2 and the spray module through the remote control terminal. The motor 2 drives the rotating shaft 3, the sliding ring 4 and the driving component to rotate together through the gears, and the sliding ring 4 and the rotating rod 5 stir the solution at the liquid surface in the kettle body 1. The driving component stirs the solution in the kettle body 1, and the spray module sprays water and catalyst downward to promote the solution to undergo hydrolysis and condensation reactions to gradually form a sol. During the reaction process, the sliding ring 4 always floats on the liquid surface under the action of the floating member 42, and the rotating rod 5 rotates on its own under the drive of the driving component while following the sliding ring 4 to rotate circumferentially. Take the rotating rod 5 rotating in the counterclockwise direction as an example (hereinafter all are based on Figure 4 The rotating rod 5 on the right side of the middle is explained, and the rotation direction of the rotating rod 5 is Figure 4 Direction of rotation from right to left perspective): At this time, taking the elastic plate 7 on the front side as an example, when the spoon-shaped structure composed of the elastic plate 7 and the adjacent connecting member 9 rotates to a horizontal state, the bottom surface of the spoon-shaped structure contacts the liquid, and during the rotation of the spoon-shaped structure, the liquid at the contacted liquid surface is gradually squeezed to the lower side of the liquid surface, and the edge position of the spoon-shaped structure gradually moves to the lower side of the liquid surface. When the liquid surface is above the edge of the spoon-shaped structure, the liquid around the spoon-shaped structure (including the generated sol) slowly flows into the interior of the spoon-shaped structure along the edge of the spoon-shaped structure, because at this time, the liquid flowing into the spoon-shaped structure is the liquid on the upper surface (including the newly generated sol). When the liquid at the liquid surface flows into the spoon-shaped structure, the surrounding liquid gradually flows upward to replace the vacancy of the liquid at the liquid surface, thereby causing the liquid containing the sol at the liquid surface and other liquids below the liquid surface to mix and exchange with each other, and during the exchange process, the liquid flows smoothly close to the spoon-shaped structure, reducing the probability of gas mixing into the liquid during the mixing process, and then the spoon-shaped structure on the rotating rod 5 continuously drives the liquid at the liquid surface to mix with each other during the rotation process.

[0025] When the solution is completely gelled (i.e., the reaction is finished), the staff turns off the motor 2 and the spray module through the control terminal, and discharges the sol in the kettle body 1 from the discharge port.

[0026] Further, such as Figure 3 and Figure 4 As shown, the driving assembly includes: a fixed column 10, fixedly connected to the bottom of the kettle body 1, the upper spline of the fixed column 10 is connected with a spline gear 11, the spline gear 11 is rotatably connected to the sliding ring 4, the rotating rod 5 is provided with a connecting shaft 12, the connecting shaft 12 is rotatably connected to the sliding ring 4, the connecting shaft 12 and the spline gear 11 are driven by a helical gear set; there are a plurality of fixed gears 13, all of which are fixedly connected to the fixed column 10 in a longitudinally spaced manner, the rotating shaft 3 is rotatably connected with agitators 14 distributed at intervals, and the agitators 14 and adjacent fixed gears 13 are driven by a helical gear set.

[0027] Furthermore, the number of teeth of the helical gear on the connecting shaft 12 is not less than the number of teeth of the spline gear 11 .

[0028] In the above scheme, because the spline gear 11 and the fixed gear 13 will not rotate under the limit of the fixed column 10, during the rotation of the sliding ring 4 and the rotating shaft 3, the stirring member 14, the connecting shaft 12 and the rotating rod 5 will rotate along with the connecting shaft 12, and the stirring member 14 and the connecting shaft 12 will also rotate in the process of meshing of the bevel gears thereon with the spline gear 11 and the fixed gear 13, thereby improving the effect of the stirring member 14 and the rotating rod 5 on stirring the solution in the kettle body 1; by making the number of teeth of the helical gear on the connecting shaft 12 greater than or equal to the number of teeth of the spline gear 11, Furthermore, the rotation speed of the connecting shaft 12 and the rotating rod 5 is limited to prevent the rotating rod 5 from driving the components thereon to rotate rapidly, causing the gas to be integrated into the solution during the stirring process, affecting the subsequent treatment of the formed gel. The number of teeth of the bevel gear on the stirring member 14 is between 0.8 and 1.3 times the number of teeth of the fixed gear 13. The specific value needs to be specifically set according to the rotation speed requirement of the rotating shaft 3. Under the premise of not excessively stirring the solution and affecting the formation of a three-dimensional network structure of the sol molecules in the solution, the frequency of contact between the solution and the water and the catalyst is increased as much as possible to improve the overall reaction rate.

[0029] In the above scheme, the spring telescopic member 6 is regarded as a fixed structure, and its telescopic end will not extend or retract, while in the following scheme, the spring telescopic member 6 is regarded as a telescopic rod structure, and its telescopic end is always subjected to a force extending outward under the action of elastic force.

[0030] Further, such as Figure 4 , Figure 5 , Figure 7 and Fig. 9 As shown, it also includes: an adjusting mechanism, the number of which is the same as the number of the fixed shells 41, which are respectively arranged on adjacent rotating rods 5, and are used to adjust the degree of bending at adjacent elastic plates 7, the adjusting mechanism includes: connecting ropes 15, the number of which is the same as the number of the spring telescopic members 6, which are respectively fixed to the telescopic ends of the adjacent spring telescopic members 6, the rotating rod 5 is slidably connected with sliding blocks 16 arranged at circumferential intervals, the number of the sliding blocks 16 is the same as the number of the spring telescopic members 6, the spring telescopic members 6 are fixed to the adjacent connecting ropes 15, the fixed shell 41 is provided with a slide groove, and the sliding block 16 slides in the slide groove of the adjacent fixed shell 41; a swing assembly, which is arranged on the fixed shell 41, and is used to control the direction of the protrusion of the adjacent elastic plate 7.

[0031] Further, such as Figure 6As shown, the elastic plate 7 and the fixed rod 8 are both made of elastic alloys, the fixed portion and the telescopic end of the spring telescopic member 6 are respectively fixedly connected to the two ends of the adjacent fixed rod 8, and the connecting member 9 can be stretched and deformed. The two and the adjacent elastic plate 7 together form a deformable spoon-shaped structure.

[0032] Further, such as Figure 6 As shown, the maximum length of the spring expansion member 6 is greater than the maximum length of the elastic plate 7 .

[0033] Further, such as Figure 7 As shown, the upper slide groove of the fixed shell 41 is composed of two sections of annular slide grooves 161 and two sections of V-shaped slide grooves 162 which are connected to each other.

[0034] In the above scheme, the connecting member 9 is made of flexible rubber material, the maximum length of the spring telescopic member 6 is greater than the maximum length of the elastic plate 7, and the length of the fixing rod 8 is greater than the length of the spring telescopic member 6 in the longest state, which is used to ensure that when the spring telescopic member 6 is extended, the elastic plate 7 and the fixing rod 8 are synchronously stretched to the longest state (or stretched to a straight state). When the telescopic end of the spring telescopic member 6 is fully extended, the middle part of the fixing rod 8 is still slightly bent toward one side of the adjacent elastic plate 7. Therefore, when the telescopic end of the spring telescopic member 6 retracts inward, the middle parts of the symmetrical fixing rods 8 are bent in opposite directions and synchronously bent and deformed toward the side close to the axis of symmetry of the adjacent spring telescopic member 6, so as to promote the deformation of each part of the connecting member 9 to be in a relatively uniform state and avoid wrinkles in the connecting member 9.

[0035] The working principle of the above scheme is: in the process of rotating the rod 5 driving the spring expansion member 6 and the elastic plate 7 thereon to rotate, Figure 4Taking the elastic plate 7, that is, the adjacent component on the middle front side as an example, when the rotating rod 5 rotates counterclockwise and the spoon-shaped structure is completely immersed in the solution, the sliding block 16 approaches the V-shaped groove 162 on the lower side under the drive of the rotating rod 5. When the sliding block 16 contacts the V-shaped groove 162 on the lower side during the process of following the rotation of the rotating rod 5, the sliding block 16 slides to the right along the V-shaped groove 162, and the telescopic end of the spring telescopic member 6 loses the limiting force of the connecting rope 15 and gradually extends out. At this time, the elastic plate 7 and the fixed rod 8 gradually recover to a straight state under the action of their own elastic forces. When the sliding block 16 slides to the rightmost side of the adjacent V-shaped groove 162, the spring telescopic member 6 is located directly below the rotating rod 5, and the telescopic end of the spring telescopic member 6 is extended to the limit state. At this time, the second rotating shaft 62 and the fixed part of the elastic plate 7 are located on the rear side of the elastic plate 7. 62 rotates clockwise driven by the swing assembly, and the second rotating shaft 62 drives the fixed connection portion with the elastic plate 7 to deflect toward the front side. Subsequently, the sliding block 16 slides to the left along the V-shaped slide groove 162 while following the rotation of the rotating rod 5. The sliding block 16 drags the telescopic end of the spring telescopic member 6 to retract inward through the connecting rope 15. At this time, because the fixed connection portion of the elastic plate 7 with the second rotating shaft 62 is deflected to the front side, when the elastic plate 7 is bent and deformed under force, the elastic plate 7 bends and deforms forward, and the middle part of the fixed rod 8 is still deformed by being recessed toward the symmetric axis of the adjacent spring telescopic member 6 (that is, the deformation direction of the fixed rod 8 does not change). At this time, the concave surface of the spoon-shaped structure formed by the elastic plate 7, the fixed rod 8 and the connecting member 9 faces the rear side. Subsequently, while the rotating rod 5 drives the spoon-shaped structure to rotate, the spoon-shaped structure pushes the solution inside it to move toward the water surface.

[0036] When the spring expansion member 6 approaches the rear water surface position, the edge of the spoon-shaped structure is still below the water surface, and the sliding block 16 contacts the V-shaped groove 162 on the rear side. The sliding block 16 moves driven by the V-shaped groove 162. At this time, the expansion end of the spring expansion member 6 extends backward and continues to drag the elastic plate 7 to a straight state. The elastic plate 7 carrying the liquid in the spoon-shaped structure quickly surges toward the upper liquid surface position, thereby quickly driving the liquid under the liquid surface to the liquid surface position. When the elastic plate 7 is flattened, the second rotating shaft 62 rotates under the drive of the swing assembly, so that the connection between the second rotating shaft 62 and the elastic plate 7 rotates to the upper side, and then when the expansion end of the spring expansion member 6 retracts again, the elastic plate 7 bends upward under the action of its own elastic force and returns to its initial state. Subsequently, the spring expansion member 6 and the elastic plate 7 are driven by the adjacent rotating rod 5 to repeatedly stir the solution at the surrounding liquid surface to promote the fusion of the solution surface and the solution on the lower side.

[0037] Further, such as Figure 6 and Figure 8As shown, the swing assembly includes: extrusion rods 17, the number of which is the same as the number of spring telescopic parts 6, which are respectively slidably connected to adjacent spring telescopic parts 6, the second rotating shaft 62 is provided with an inclined slide groove 171, the extrusion rod 17 is extruded and matched with the adjacent inclined slide groove 171, and a first torsion spring is provided between the second rotating shaft 62 and the fixed part of the adjacent spring telescopic part 6; an extrusion ring 18, which is fixedly connected to the outer side of the adjacent fixed shell 41, and the extrusion rod 17 is extruded and matched with the extrusion ring 18.

[0038] In the above scheme, the specific structure of the extrusion ring 18 is as follows Figure 7 As shown, the extrusion ring 18 is provided with two inclined surfaces, and the positions of the two inclined surfaces correspond to the positions of the two V-shaped grooves 162 on the adjacent fixed shell 41, and the elastic force of the first torsion spring on the second rotating shaft 62 is greater than the sum of the elastic forces of the adjacent spring telescopic member 6 and the adjacent elastic plate 7, so that each time the telescopic end of the spring telescopic member 6 extends outward, the second rotating shaft 62 pulls the elastic plate 7 in different directions, thereby causing the elastic plate 7 to completely deform in different directions, changing the orientation of the concave surface of the spoon-shaped structure, and when the elastic plate 7 is squeezed by the extrusion ring 18, the elastic plate 7 drives the second rotating shaft 62 to rotate by squeezing the inclined grooves 171 on the second rotating shaft 62, and when the elastic plate 7 is out of contact with the extrusion ring 18, the second rotating shaft 62 drives the second rotating shaft 62 to rotate and reset under the action of the first torsion spring, and the second rotating shaft 62 drives the extrusion rod 17 to move and reset.

[0039] Further, such as Fig. 9 As shown, it also includes: elastic telescopic rods 19, the number of which is the same as the number of fixed shells 41, which are respectively fixed to one side of the outside of the sliding ring 4 close to the fixed shell 41, the telescopic ends of the elastic telescopic rods 19 are fixed with wedge blocks, the rotating rod 5 is fixed with limit blocks 20 arranged at circumferential intervals, the limit blocks 20 are squeezed and matched with adjacent wedge blocks, the number of limit blocks 20 is the same as the number of spring telescopic parts 6, the rotating rod 5 is rotatably connected to the adjacent connecting shaft 12, and a second torsion spring is fixed between the rotating rod 5 and the adjacent connecting shaft 12.

[0040] In the above solution, the upper side of the wedge block is provided with an inclined surface, and Fig. 9The figure in the figure is the initial state of the elastic telescopic rod 19. At this time, the wedge-shaped block on the elastic telescopic rod 19 is just squeezed and matched with the limit block 20, and the edge of the spoon-shaped structure is just immersed in the liquid surface. When the connecting shaft 12 rotates, the connecting shaft 12 drives the adjacent rotating rod 5 to rotate together through the second torsion spring. The position of the limit block 20 corresponds to the position of the spring telescopic member 6 on the same rotating rod 5. Then, each time the adjacent spring telescopic member 6 rotates to the liquid surface position (when the liquid containing the colloid flows into the spoon-shaped structure from the edge of the adjacent spoon-shaped structure), the wedge-shaped block on the elastic telescopic rod 19 limits the corresponding limit block 20. At this time, the rotating rod 5 and the limit block 20 are in the wedge-shaped block on the elastic telescopic rod 19. It is unable to continue rotating under the limit, and the second torsion spring on the rotating rod 5 twists and stores force. At this time, the corresponding spoon-shaped structure is stationary at the water surface to ensure that the spoon-shaped structure only attracts liquid on the water surface, thereby ensuring the effectiveness of the exchange between the liquid on the water surface and the liquid on the lower side. When the stored elastic force of the second torsion spring on the rotating rod 5 is greater than the elastic force on the elastic telescopic rod 19, the rotating rod 5 and the limit block 20 rotate slowly under the action of the second torsion spring, and the limit block 20 squeezes the inclined surface of the wedge block on the elastic telescopic rod 19 to make the telescopic end of the elastic telescopic rod 19 retract inward. When the limit block 20 passes through the wedge block on the elastic telescopic rod 19, the rotating rod 5 is quickly reset under the torsion of the second torsion spring.

[0041] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A precursor mixing device for aerogel preparation, characterized in that: Included are: A kettle body (1), the kettle body (1) being fixedly connected to a motor (2), the kettle body (1) being rotatably connected to a rotating shaft (3), the rotating shaft (3) and the output shaft of the motor (2) being transmitted via a gear set; A sliding ring (4) is slidably connected to the rotating shaft (3); the sliding ring (4) is fixedly connected to a fixed shell (41) arranged at intervals in the circumferential direction; the fixed shell (41) is rotatably connected to a rotating rod (5); the rotating rod (5) is fixedly connected to a spring telescopic member (6) arranged at intervals in the circumferential direction; the telescopic end of the spring telescopic member (6) is rotatably connected to a first rotating shaft (61); and the fixed portion of the spring telescopic member (6) is rotatably connected to a second rotating shaft (62); The number of elastic plates (7) is equal to the number of the spring telescopic members (6), and they are respectively fixed between adjacent first rotating shafts (61) and adjacent second rotating shafts (62); symmetrically distributed fixing rods (8) are installed between the fixing portion and the telescopic end of the spring telescopic member (6); connecting members (9) are installed between the fixing rods (8) and the adjacent elastic plates (7); the fixing rods (8), the adjacent connecting members (9) and the adjacent elastic plates (7) together form a spoon-shaped structure; A driving assembly is arranged in the kettle body (1) and is used to drive the rotating rod (5) to revolve and rotate.

2. A precursor mixing device for aerogel preparation according to claim 1, characterized in that: A floating member (42) is fixedly connected to the bottom of the sliding ring (4), and the density of the floating member (42) is less than the density of the sol.

3. A precursor mixing device for aerogel preparation according to claim 1, characterized in that: The drive assembly comprises: A fixed column (10) is fixedly connected to the bottom of the kettle body (1); the upper part of the fixed column (10) is spline-connected with a spline gear (11); the spline gear (11) is rotatably connected to the sliding ring (4); the rotating rod (5) is provided with a connecting shaft (12); the connecting shaft (12) is rotatably connected to the sliding ring (4); the connecting shaft (12) and the spline gear (11) are driven by a helical gear set; There are a plurality of fixed gears (13), all of which are fixedly connected to the fixed column (10) in a longitudinally spaced manner. The rotating shaft (3) is rotatably connected to stirring members (14) distributed at intervals. The stirring members (14) and adjacent fixed gears (13) are driven by a bevel gear set.

4. A precursor mixing device for aerogel preparation according to claim 3, characterized in that: The number of teeth of the helical gear on the connecting shaft (12) is not less than the number of teeth of the spline gear (11).

5. The precursor mixing device for aerogel preparation according to claim 3, characterized in that: Also included are: The number of the adjusting mechanisms is the same as the number of the fixed shells (41), and they are respectively arranged on adjacent rotating rods (5) and are used to adjust the degree of bending at adjacent elastic plates (7). The adjusting mechanisms include: The connecting ropes (15) are the same in number as the spring telescopic parts (6) and are respectively fixed to the telescopic ends of the adjacent spring telescopic parts (6); the rotating rod (5) is slidably connected to sliding blocks (16) arranged at intervals in the circumferential direction; the number of the sliding blocks (16) is the same in number as the spring telescopic parts (6); the spring telescopic parts (6) are fixed to the adjacent connecting ropes (15); the fixed shell (41) is provided with a sliding groove; the sliding block (16) slides in the sliding groove of the adjacent fixed shell (41); A swing assembly is arranged on the fixed shell (41) and is used to control the direction of the protrusion of the adjacent elastic plate (7).

6. A precursor mixing device for aerogel preparation according to claim 5, characterized in that: The elastic plate (7) and the fixing rod (8) are both made of elastic alloys. The fixing portion and the telescopic end of the spring telescopic member (6) are respectively fixedly connected to the two ends of the adjacent fixing rod (8). The connecting member (9) can be stretched and deformed. The two together with the adjacent elastic plate (7) form a deformable spoon-shaped structure.

7. A precursor mixing device for aerogel preparation according to claim 6, characterized in that: The maximum length of the spring expansion member (6) is greater than the maximum length of the elastic plate (7).

8. The precursor mixing device for preparing aerogel according to claim 5, characterized in that: The upper slide groove of the fixed shell (41) is composed of two sections of annular slide grooves (161) and two sections of V-shaped slide grooves (162) which are connected to each other.

9. A precursor mixing device for preparing aerogel according to claim 8, characterized in that: The swing assembly includes: The number of extrusion rods (17) is the same as the number of the spring expansion and contraction parts (6), and they are respectively slidably connected to adjacent spring expansion and contraction parts (6); the second rotating shaft (62) is provided with an inclined sliding groove (171); the extrusion rod (17) is extruded and matched with the adjacent inclined sliding groove (171); and a first torsion spring is provided between the second rotating shaft (62) and the fixing part of the adjacent spring expansion and contraction part (6); The extrusion ring (18) is fixedly connected to the outer side of the adjacent fixed shell (41), and the extrusion rod (17) is extrusion-fitted with the extrusion ring (18).

10. A precursor mixing device for preparing aerogel according to claim 9, characterized in that: Also included are: The elastic telescopic rods (19) are the same in number as the fixed shells (41) and are respectively fixedly connected to one side of the sliding ring (4) near the fixed shell (41). The telescopic ends of the elastic telescopic rods (19) are fixedly connected with wedge blocks. The rotating rods (5) are fixedly connected with circumferentially spaced limit blocks (20). The limit blocks (20) are squeezed and matched with adjacent wedge blocks. The number of the limit blocks (20) is the same as the number of the spring telescopic members (6). The rotating rods (5) are rotatably connected to the adjacent connecting shafts (12). A second torsion spring is fixedly connected between the rotating rods (5) and the adjacent connecting shafts (12).

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