Aerogel composite sheet production system

Abstract

The invention relates to the technical field of aerogel composite material production equipment, in particular to an aerogel composite sheet production system. The aerogel composite sheet production system comprises a base material supply device, a sol preparation device, a polycondensation material preparation device, a gumming machine, a gel thickness determining device, an aging device and a slicing machine, the base material supply device is used for supplying continuous base materials to the gluing machine, and the gluing machine, the gel thickness determining device, the aging device and the slicing machine are sequentially arranged in the base material conveying direction. The gluing machine comprises a sol pressurizing device, a polycondensation material pressurizing device, a mixing device and a gluing device, wherein the gluing device comprises a gluing part and a negative pressure mechanism; the gel thickness determining device comprises a double-belt rolling mechanism, and the double-belt rolling mechanism comprises a first rolling mechanism and a second rolling mechanism. The aerogel composite sheet has the advantages of being high in thickness consistency, good in surface quality and high in aerogel filling rate, continuous production can be adopted, and efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of aerogel composite material production equipment, and in particular to an aerogel composite sheet production system. Background Art

[0002] Aerogel is a three-dimensional nanoporous structure material prepared by the sol-gel method and a special drying method. It has the characteristics of extremely high porosity, large specific surface area, extremely low density and thermal conductivity, and has extremely broad application prospects in the fields of thermal insulation. However, aerogel has problems such as low strength and high brittleness, making it difficult to use directly. The current mainstream method is to compound silica aerogel with a fiber substrate to obtain an aerogel composite felt insulation material with a certain degree of flexibility.

[0003] Aerogel thermal insulation composite materials have been applied in the fields of new energy electric vehicle power batteries, etc., and are usually used in the form of sheets for thermal insulation between power battery cells. The thickness consistency of aerogel composite materials is high and the tolerance range is narrow. Therefore, the aerogel composite thermal insulation material prepared with roll-type fiber substrate composite aerogel needs to be leveled and cut before being applied to power batteries. At present, during the leveling process, the aerogel fiber composite sheet is usually subjected to a compression deformation of more than 20%, and the aerogel body can produce a large elastic deformation. After the pressure is released, elastic recovery will occur, resulting in the thickness tolerance being difficult to control and the yield rate being low; on the other hand, excessive compression will also destroy the integrity of the three-dimensional nanostructure of the aerogel body, resulting in insufficient elasticity of the compressed aerogel and reduced thermal insulation performance; furthermore, due to the implementation of the compression and leveling process, it is time-consuming, energy-consuming, and labor-intensive, resulting in increased costs. In addition, a large amount of scraps are easily generated during the cutting process, resulting in waste of aerogel composite materials. During the cutting process, the aerogel powder in the aerogel composite material will fall off to varying degrees. The fallen aerogel powder will cause dust pollution in the processing environment due to its small particle size and light weight.

[0004] In order to reduce the waste of aerogel composite materials and the dust pollution to the processing environment caused by aerogel powder falling off the aerogel composite materials, the fiber substrate can be cut into the required size before producing the aerogel composite sheet, which can also greatly save costs. For example, the patent with publication number CN213972060U discloses a sheet aerogel production gel device, which is to dip the cut fiber substrate into glue to facilitate the subsequent preparation of sheet aerogel. However, this scheme also only involves the dipping treatment of the fiber substrate, and does not involve how to control the thickness consistency of the sheet-type aerogel composite material or how to control the product performance consistency or how to achieve efficient and continuous production.

[0005] For another example, the patent with the announcement number CN114477949A discloses a method and equipment for preparing gel felt, which removes excess glue by vertically conveying the fiber felt combined with the catalytic sol under the action of gravity. However, this solution only involves the problem of controlling the amount of glue impregnation of the fiber substrate, and does not involve production process solutions such as thickness consistency control of sheet-type aerogel composite materials.

[0006] Therefore, there is an urgent need to find effective solutions to solve the above problems. Summary of the invention

[0007] In view of this, the present invention aims to solve at least one of the above technical problems to a certain extent. To this end, the present invention proposes an aerogel composite sheet production system, which can at least alleviate the problem that the current aerogel composite sheet production system is difficult to ensure the thickness consistency of the composite sheet, can improve the thickness consistency of the aerogel composite sheet, improve the surface quality, and have high production efficiency.

[0008] In order to solve the above technical problems, this application is implemented as follows:

[0009] According to an embodiment of the present invention, there is provided an aerogel composite sheet production system, which includes: a substrate supply device, a sol preparation device, a condensation material preparation device, a glue coating machine, a gel thickness setting device, an aging device and a slicer;

[0010] The substrate supply device is used to supply continuous substrate to the glue coating machine, and along the direction of the substrate conveying, the glue coating machine, the gel thickness determination device, the aging device and the slicer are arranged in sequence;

[0011] The glue coating machine comprises a sol pressurizing device, a polycondensation material pressurizing device, a mixing device and a glue coating device, and the glue coating device comprises a glue coating component and a negative pressure mechanism;

[0012] The discharge port of the sol preparation device is connected to the inlet of the sol pressurizing device, the discharge port of the polycondensation material preparation device is connected to the inlet of the polycondensation material pressurizing device, and the discharge port of the sol pressurizing device and the discharge port of the polycondensation material pressurizing device are respectively connected to the inlet of the mixing device;

[0013] The material outlet of the mixing device is connected to the material inlet of the glue coating component, the glue coating component is used to combine the mixed material containing the sol and the polycondensation material with the substrate, and the negative pressure mechanism is used to generate a negative pressure area on the substrate;

[0014] Preferably, the glue coating device further comprises a glue coating pressurizing mechanism, the discharge port of the mixing device is connected to the feed port of the glue coating pressurizing mechanism, and the discharge port of the glue coating pressurizing mechanism is connected to the glue coating component.

[0015] The gel thickness determination device comprises a double-belt rolling mechanism, and the double-belt rolling mechanism comprises a first rolling mechanism and a second rolling mechanism respectively located on the two side surfaces of the substrate after the dipping.

[0016] In addition, the aerogel composite sheet production system according to the present invention may also have the following additional technical features:

[0017] In some embodiments, the sol preparation device includes a first stirring tank, a first metering pump, a first weighing component and a first detection component, the first metering pump is connected to the feed port of the first stirring tank, and the first weighing component and the first detection component are respectively installed on the first stirring tank.

[0018] In some embodiments, the condensation material preparation device includes a second stirring tank, a second metering pump, a feeding mechanism, a second weighing component, a second detection component and a first ultrasonic vibration mechanism, the second metering pump and the feeding mechanism are respectively connected to the feed port of the second stirring tank, the second weighing component and the second detection component are respectively installed on the second stirring tank; the first ultrasonic vibration mechanism is arranged in the second stirring tank, for evenly dispersing the condensation material and heating the condensation material.

[0019] In some of the embodiments, the sol pressurizing device includes a sol intermediate tank, a first pressurizing pump, a first mixing and heating mechanism and a third detection component; the discharge port of the sol preparation device is connected to the inlet of the sol intermediate tank, and the discharge port of the sol intermediate tank is connected to the first pressurizing pump; the first mixing and heating mechanism and the third detection component are respectively arranged in the sol intermediate tank, and are respectively used to mix, heat and detect the sol.

[0020] In some of the embodiments, the condensation material pressurizing device includes a condensation material intermediate tank, a second pressurizing pump, a second mixing and heating mechanism and a fourth detection component; the discharge port of the condensation material preparation device is connected to the inlet of the condensation material intermediate tank, and the discharge port of the condensation material intermediate tank is connected to the second pressurizing pump; the second mixing and heating mechanism and the fourth detection component are respectively arranged in the condensation material intermediate tank, and are respectively used to mix, heat and detect the condensation material.

[0021] In some embodiments, the first pressure pump and the second pressure pump include plunger diaphragm pumps respectively.

[0022] In some embodiments, the first mixing and heating mechanism and the second mixing and heating mechanism include a second ultrasonic vibration mechanism and a third ultrasonic vibration mechanism, respectively.

[0023] In some of the embodiments, the sol pressurizing device further comprises a first cleaning mechanism for cleaning the sol pressurizing device and a first online flow meter for online metering of the sol content;

[0024] In some of the embodiments, the polycondensation material pressurizing device further comprises a second cleaning mechanism for cleaning the polycondensation material pressurizing device and a second online flow meter for online measuring the polycondensation material content.

[0025] In some of the embodiments, the mixing device includes a static mixer and a third cleaning mechanism for cleaning the static mixer.

[0026] In some embodiments, the glue coating device further comprises a glue coating box, wherein opposite ends of the glue coating box are provided with an inlet and an outlet for the substrate to enter and exit, and the negative pressure mechanism and the glue coating component are both located in the glue coating box.

[0027] In some of the embodiments, the glue coating device further includes a fourth ultrasonic vibration mechanism, and the fourth ultrasonic vibration mechanism is disposed in the glue coating box and below the substrate after being dipped in glue.

[0028] In some embodiments, the glue coating device further includes a first nitrogen sealing mechanism and a second nitrogen sealing mechanism, and the first nitrogen sealing mechanism and the second nitrogen sealing mechanism are respectively located at the inlet side and the outlet side of the glue coating box.

[0029] In some of the embodiments, the glue coating device further includes a fourth cleaning mechanism.

[0030] In some of the embodiments, the glue coating pressurizing mechanism includes a plunger diaphragm pump.

[0031] In some of the embodiments, the glue coating component includes a porous matrix glue coating head, and the porous matrix glue coating head includes a plurality of groups of tubular glue coaters.

[0032] In some of the embodiments, the negative pressure mechanism includes a negative pressure generator and a negative pressure uniform distribution member connected to the negative pressure generator, and the negative pressure uniform distribution member is disposed on the upper side and / or the lower side of the substrate.

[0033] In some of the embodiments, the gel thickness determination device further comprises a pre-gel box, and along the conveying direction of the substrate, the glue coater, the pre-gel box, the double-belt rolling mechanism, the aging device and the slicer are arranged in sequence.

[0034] The opposite ends of the pre-gel box are provided with an inlet and an outlet for the substrate after the gelling agent to enter and exit; the inlet side and the outlet side of the pre-gel box are respectively provided with a third nitrogen sealing mechanism and a fourth nitrogen sealing mechanism.

[0035] In some of the embodiments, the gel thickness calibration device also includes a gel thickness calibration box, and the opposite ends of the gel thickness calibration box are provided with an inlet and an outlet for the substrate after being dipped in glue, and the inlet side and the outlet side of the gel thickness calibration box are respectively provided with a nitrogen sealing mechanism; the first rolling mechanism and the second rolling mechanism are located in the gel thickness calibration box; and a fifth detection component is provided in the gel thickness calibration box.

[0036] In some embodiments, the first rolling mechanism includes a first active roller, a first passive roller, a first pressing plate (or a first supporting plate) and a first rolling belt, the first active roller and the first passive roller drive the first rolling belt to move, and the first rolling belt is connected to the first pressing plate;

[0037] The second rolling mechanism includes a second active roller, a second passive roller, a second pressure plate (or a second support plate) and a second rolling belt. The second rolling belt is driven to move by the second active roller and the second passive roller, and the second rolling belt is connected to the second pressure plate.

[0038] In some embodiments, the first rolling mechanism and the second rolling mechanism are respectively connected to a height adjustment mechanism.

[0039] In some of the embodiments, the production system also includes a sheet framing device, and along the direction of conveying the substrate, the glue coating machine, the gel thickness determination device, the aging device, the slicer and the sheet framing device are arranged in sequence; the sheet framing device includes a material box framing machine and a flipping machine, the material box in the material box framing machine is used to accommodate alternately placed sliced ​​composite gel sheets and spacers, and the flipping machine is used to flip the material box.

[0040] In some embodiments, the material box frame assembly machine includes a material box machine and a frame assembly machine, wherein the material box machine includes a material box, a gel sheet conveying mechanism, a spacer conveying mechanism, a grasping robot and a material box conveying mechanism, the grasping robot is arranged on one side of the gel sheet conveying mechanism or the spacer conveying mechanism, and is used to grasp the spacers and the sliced ​​composite gel sheets and place them alternately in the material box in sequence, the material box conveying mechanism is arranged on one side of the material box, and is used to transfer the material box containing the alternately placed sliced ​​composite gel sheets and spacers to the frame assembly machine; the frame assembly machine includes a material box stacking mechanism and a material frame combination mechanism, the material box stacking mechanism is located downstream of the material box conveying mechanism, and is used to stack multiple material boxes into stacks to form a material box combination; the material frame combination mechanism is located downstream of the material box stacking mechanism, and is used to load the material box combination into a material frame.

[0041] In some of the embodiments, the production system further comprises a solvent replacement device and a drying device;

[0042] Along the conveying direction of the substrate, the glue coating machine, the gel thickness determination device, the aging device, the slicer, the sheet framing device, the solvent replacement device and the drying device are arranged in sequence.

[0043] In some embodiments, the aging device includes a microwave aging device, which includes an aging box, a microwave heating mechanism, a cooling mechanism and a nitrogen sealing mechanism.

[0044] In some of the embodiments, the drying device comprises a supercritical drying device.

[0045] Implementing the technical solution of this application has at least the following beneficial effects:

[0046] According to the aerogel composite sheet production system provided by the present application, it includes a substrate supply device, a sol preparation device, a condensation material preparation device, a glue coating machine, a gel thickness setting device, an aging device and a slicer; wherein the substrate supply device can be used to supply a continuous substrate, the sol preparation device can be used to prepare a sol, the condensation material preparation device can be used to prepare a condensation material, the aging device can be used to quickly age the composite gel body, and the slicer can be used to cut the composite gel body into a predetermined size according to the size requirements; in particular, the glue coating machine in the production system of the present application A sol pressurizing device, a condensation material pressurizing device, a mixing device and a glue coating device are provided, and the glue coating device includes a glue coating component and a negative pressure mechanism; the sol pressurizing device and the condensation material pressurizing device can be used to pressurize the prepared sol and the condensation material respectively, that is, the two are pressurized separately and then quickly mixed by using the mixing device, and after mixing, the glue coating pressurizing mechanism and / or the glue coating component in the glue coating device can be used to maintain a certain pressure on the mixed liquid (or catalytic sol), and under certain pressure conditions, the mixed liquid (or catalytic sol) is dip-coated into the substrate by using the glue coating component.

[0047] Thus, by adopting the sol pressurization, polycondensation material pressurization and pressure continuous feeding rapid mixing technology, under a certain pressure (such as 0.1-7MPa pressure), the sol and the polycondensation material are continuously pumped into the mixing device for continuous rapid and uniform mixing, and a certain pressure is maintained by the glue coating pressurization mechanism and / or the glue coating component to generate a certain pressure (about 0.1-7MPa) of the catalytic post-sol, which can quickly immerse into the pores of the substrate. In addition, a negative pressure mechanism is also adopted, and a local negative pressure area can be formed on the surface and / or inside of the substrate by the negative pressure mechanism, which significantly increases the driving force for dipping, promotes the catalytic sol with a certain pressure flowing out of the glue coating component to further quickly immerse into the substrate such as fiber felt, greatly promotes the speed and depth of the catalytic sol immersing into the substrate, and ensures the fullness of the dipping, so the substrate can be increased in the dipping process. The belt speed is increased to more than 20M / min, and the dipping efficiency is significantly improved. Thus, by maintaining a certain pressure of glue coating and the synergistic effect of negative pressure attraction in the substrate, the catalytic sol can be continuously and quickly dipped on the substrate, ensuring the consistency of dip quality and product performance, and obtaining a higher yield rate, which can improve the surface quality of the product, increase the filling rate of the catalytic sol, and ensure the dip depth of thicker substrates (such as fiber substrates exceeding 2mm) and the consistency of the thickness of the aerogel composite sheet. In addition, since the dip pool commonly used in the prior art can be omitted, the amount of sol used is greatly saved, reducing production costs.

[0048] In addition, the present invention also provides a gel thickness setting device, which includes a double-belt rolling mechanism, which can effectively control the thickness of the composite gel body, thereby facilitating the achievement of a high consistency in the thickness of the aerogel composite sheet.

[0049] In addition, the present invention is also provided with an aging device and a slicer, which can realize online continuous rapid aging and can also cut the composite gel body according to a preset size.

[0050] Additional aspects and advantages of the present application will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Shown is a partial structural schematic diagram of an aerogel composite sheet production system provided by an embodiment of the present invention;

[0052] Figure 2 Shown is another partial structural schematic diagram of another aerogel composite sheet production system provided by an embodiment of the present invention;

[0053] Figure 3The figure shows a schematic structural diagram of a substrate supply device, a sol preparation device, a polycondensation material preparation device, a glue coater, a gel thickness setting device, an aging device and a slicer in an aerogel composite sheet production system provided by an embodiment of the present invention;

[0054] Figure 4 The figure is a schematic structural diagram of a material box provided by an embodiment of the present invention;

[0055] Figure 5 Shown is a partial structural schematic diagram of a material box provided by an embodiment of the present invention;

[0056] Figure 6 Shown is another partial structural schematic diagram of a material box provided by an embodiment of the present invention;

[0057] Figure 7 FIG. 1 is a schematic diagram of a portion of the structure of a sheet material framing device provided in an embodiment of the present invention;

[0058] Figure 8 Shown is another partial structural schematic diagram of the sheet framing device provided by an embodiment of the present invention;

[0059] Fig. 9 FIG. 1 is another partial structural schematic diagram of the sheet material framing device provided in an embodiment of the present invention.

[0060] Description of reference numerals:

[0061] 1-substrate supply device; 101-unwinding machine;

[0062] 2-sol preparation device; 201-first stirring tank; 202-first weighing component;

[0063] 3-condensation material preparation device; 301-second stirring tank; 302-feeding mechanism; 303-second weighing component;

[0064] 4-Glue coating machine;

[0065] 401-sol pressurizing device; 411-first pressurizing pump; 412-first online flow meter;

[0066] 402-condensation material pressurizing device; 421-condensation material intermediate tank; 422-second pressurizing pump;

[0067] 403-Mixing device;

[0068] 404- glue coating device; 441- glue coating pressurizing mechanism; 442- glue coating component; 443- negative pressure mechanism; 444- glue coating box; 445- fourth ultrasonic vibration mechanism; 446- first nitrogen sealing mechanism; 447- second nitrogen sealing mechanism;

[0069] 5-Gel thickness setting device;

[0070] 501-pre-gel box;

[0071] 502- double belt rolling mechanism; 521- first rolling mechanism; 522- second rolling mechanism;

[0072] 503-Gel thickness setting box;

[0073] 504-Visual inspection box;

[0074] 505-the third nitrogen sealing mechanism;

[0075] 506-fifth nitrogen sealing mechanism;

[0076] 6-aging device; 601-seventh nitrogen sealing mechanism;

[0077] 7-slicer; 701-slitting box; 702-cross-cutting mechanism; 703-longitudinal cutting mechanism;

[0078] 8- Sheet framing device;

[0079] 801-Material box assembly machine;

[0080] 811-Material box machine;

[0081] 8111-material box; 8011-material box positioning part; 8012-material box lifting pin hole;

[0082] 8112- gel sheet transmission mechanism; 8113- spacer transmission mechanism; 8114- grasping robot; 8115- material box transmission mechanism (material box queuing machine);

[0083] 812-frame assembly machine; 8121-material box stacking mechanism; 8122-material frame assembly mechanism;

[0084] 802-Turning machine;

[0085] 803-Material frame queuing machine;

[0086] 804-Transfer tools (such as AGV transfer vehicles);

[0087] 9-Solvent replacement device;

[0088] 10- Drying device;

[0089] 11-aerogel material frame queuing machine; 12-material frame turning device; 13-material frame dismantling machine; 14-material box dismantling machine; 15-aerogel sheet queuing machine; 16-aerogel drying device; 17-testing workstation; 18-finished product queuing machine. DETAILED DESCRIPTION

[0090] In the description of the present invention, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0091] In addition, reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0092] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0093] As analyzed in the background technology, the existing preparation methods or equipment of aerogel composite materials still have certain shortcomings, especially regarding how to control the consistency of thickness and the problem of uneven impregnation, and no effective solution has been proposed. For example, the relevant technology uses a continuous combination of sol and gel polycondensation agent to form a catalytic sol, and combines the fiber substrate with the catalytic sol at a predetermined rate on a conveyor belt for gelation to form a gel sheet, but in actual production, the catalytic sol cannot be fully impregnated into the fiber substrate, and there is often a phenomenon of uneven impregnation, resulting in a large dispersion of the thermal insulation performance of the aerogel product. In addition, the relevant technology uses measures to increase the amount of catalytic sol used to achieve sufficient impregnation, but the excess amount of impregnation will be left on the conveyor belt and form a gel solid block (or powder) on the conveyor belt, which will cause a device process failure. The gel solid block on the conveyor belt will also partially adhere to the gel felt produced subsequently, resulting in wrinkles, pits, breakage and other surface quality problems on the surface of the aerogel composite product. Furthermore, the existing production equipment of rolled aerogel composite felt cannot be efficiently applied to the production of aerogel composite sheets, and the aerogel composite sheets lack continuity and are prone to surface defects, dislocation, and difficulty in re-stretching after curling during the production of aerogel composite materials.

[0094] Therefore, seeking to achieve a production process with high thickness consistency, good surface quality, high aerogel filling rate, high production efficiency, continuous production, and the ability to eliminate the leveling process for aerogel composite sheets will be the key to achieving high-quality aerogel composite products for new energy electric vehicle power batteries, etc., and then adopting production equipment suitable for aerogel composite sheets with high production efficiency, continuous production, high thickness consistency, and good surface quality to ensure a higher yield and low production cost.

[0095] In view of this, the embodiment of the present application provides an aerogel composite sheet production system, which mainly forms a catalytic sol by dipping the sol and gel polycondensation agent under negative pressure and realizing gelation under pressure constraint, so as to achieve the purpose of high thickness consistency, good surface quality, high aerogel filling rate, high production efficiency, and continuous production of aerogel composite sheets, and can save the subsequent leveling process, significantly improve the yield of aerogel composite sheets, and reduce production costs. The specific technical solution is described below.

[0096] In some embodiments, an aerogel composite sheet production system is provided, and the produced aerogel composite sheets can be used in fields such as batteries, such as power batteries, for example, for thermal insulation between power battery cells; of course, in addition to this, the aerogel composite sheets can also be used in other fields, and the embodiments of the present application do not impose specific restrictions on the specific usage scenarios and working conditions of the aerogel composite sheets.

[0097] See also Figures 1 to 9As shown, in some embodiments, the provided aerogel composite sheet production system includes: a substrate supply device 1, a sol preparation device 2, a condensation material preparation device 3, a glue coater 4, a gel thickness setting device 5, an aging device 6 and a slicer 7.

[0098] Among them, the substrate supply device 1 can be used to supply a continuous substrate (also called base material) to the coating machine 4; the sol preparation device 2 can be used to prepare the sol; the condensation material preparation device 3 can be used to prepare the condensation material, and optionally, the condensation material can include materials such as condensation agent and sunscreen; the coating machine 4 can be used to mix the prepared sol and condensation material to form a catalytic sol, and then combine the catalytic sol with the substrate, such as immersing the catalytic sol into the substrate. Further, the gel thickness setting device 5 can be used to control the thickness of the substrate such as fiber felt after the immersion in the gelation process; the aging device 6 can be used to perform aging treatment on the composite gel body; the slicer 7 can be used to cut the composite gel body into a predetermined size according to the size requirements, that is, the slicer 7 can be used to cut the aged continuous composite gel body obtained from the substrate according to the size requirements, and also obtain the composite gel sheet of the required size.

[0099] It should be noted that, in the present application, the substrate may include a fiber material and / or a 3D foam material.

[0100] In some preferred embodiments, the provided aerogel composite sheet production system further comprises: a solvent replacement device 9 and a drying device 10. The solvent replacement device 9 can be used to exchange water in the composite gel sheet with a solvent such as an alcohol solvent replacement liquid to obtain an alcohol composite gel sheet. The drying device 10 can be used to dry the alcohol composite gel sheet obtained by the solvent replacement device 9 to obtain an aerogel composite sheet.

[0101] Thus, the provided aerogel composite sheet production system mainly includes: a substrate supply device 1, a sol preparation device 2, a condensation material preparation device 3, a coating machine 4, a gel thickness setting device 5, an aging device 6, a slicer 7, a solvent replacement device 9 and a drying device 10. The substrate supply device 1 can be arranged on one side of the coating machine 4 to continuously supply the substrate to the coating machine 4, such as unwinding the fiber felt to supply a continuous fiber felt body to the coating machine 4. The sol preparation device 2 and the condensation material preparation device 3 can be respectively located on the other side of the coating machine 4, and are respectively connected to the coating machine 4, so as to respectively supply the sol and the condensation material to the coating machine 4.

[0102] According to the production process of the aerogel composite sheet, the glue coating machine 4, the gel thickness setting device 5, the aging device 6, the slicer 7, the solvent replacement device 9 and the drying device 10 can be arranged in sequence along the direction of material transportation.

[0103] Optionally, in some cases, the aerogel composite sheet production system may also include a conveying device for transferring and transporting materials. As an example, a conveying device may be provided between the aging device 6 and the slicer 7 to transfer the composite gel body obtained after aging by the aging device 6 to the slicer 7; a conveying device may be provided between the slicer 7 and the solvent replacement device 9 to transfer the composite gel sheet obtained after slicing by the slicer 7 to the solvent replacement device 9; a conveying device may be provided between the solvent replacement device 9 and the drying device 10 to transfer the composite gel sheet obtained after replacement by the solvent replacement device 9 to the drying device 10; a conveying device may be provided on the rear side of the drying device 10 to transfer the aerogel composite sheet to the next process. In this way, continuous production can be achieved and production efficiency can be improved.

[0104] It should be pointed out that the present application does not limit the specific structure of the conveying device, and it can adopt any equipment in the prior art that can realize material transfer, for example, it can adopt existing devices such as robots or mechanical arms.

[0105] Optionally, in other cases, the provided aerogel composite sheet production system further includes a sheet framing device 8 (also called a composite gel sheet arrangement and conveying device), which may be located between the slicer 7 and the solvent replacement device 9; or the sheet framing device 8 may be arranged behind the drying device 10. The sheet framing device 8 may be used to cross-place the gel sheets and the spacers in the material box 8111 until the material box 8111 is filled, and to assemble multiple groups of stacked material boxes in one material frame for conveying to the next process.

[0106] As an example, the provided aerogel composite sheet production system mainly includes: a substrate supply device 1, a sol preparation device 2, a condensation material preparation device 3, a glue coating machine 4, a gel thickness setting device 5, an aging device 6, a slicer 7, a sheet framing device 8, a solvent replacement device 9 and a drying device 10. In some cases, along the direction of material conveying, the glue coating machine 4, the gel thickness setting device 5, the aging device 6, the slicer 7, the sheet framing device 8, the solvent replacement device 9 and the drying device 10 can be arranged in sequence. Alternatively, in other cases, along the direction of material conveying, the glue coating machine 4, the gel thickness setting device 5, the aging device 6, the slicer 7, the sheet framing device 8, the solvent replacement device 9, the drying device 10 and the sheet framing device 8 can be arranged in sequence. The arrangement of the sheet framing device 8, that is, the composite gel sheet arranging and conveying device, can realize the arrangement and transfer of the composite gel sheet. At the same time, the arrangement of the sheet framing device 8 is more conducive to the subsequent solvent replacement and drying treatments, which can improve the efficiency of the replacement and drying treatments, and ensure that the composite gel sheet is not easily deformed during the replacement and drying treatments, and ensure the thickness consistency, surface quality and parallelism of the composite gel sheet during the production process, thereby ensuring a higher yield.

[0107] The aerogel composite sheet production system of the present application realizes the effect of high thickness consistency of aerogel composite sheets by impregnating the sol and the gel condensation agent to form a catalytic sol under negative pressure and realizing gelation under pressure constraint. The composite sheet has good surface quality and a high aerogel filling rate. In addition, the production system has high production efficiency, can be produced continuously, and can save the subsequent leveling process, which can significantly improve the yield of aerogel composite sheets.

[0108] The structure and connection settings of each device in the aerogel composite sheet production system of the present application will be described in detail below.

[0109] In some embodiments, in order to improve production efficiency and realize continuous production, a substrate supply device 1 is provided for supplying a continuous base material to the glue coating machine 4. Optionally, the substrate may be a fiber mat and / or a foam material (3D foam material), and the fiber mat or foam material is a coil wound in the form of a roll. Optionally, the substrate supply device 1 may include an unwinder 101, which may be used to lay out the substrate coil, that is, the substrate may be continuously released by the unwinder.

[0110] It should be pointed out that the present application does not limit the specific structural form of the substrate supply device 1 , and a conventional device for releasing the substrate in the relevant field, such as an unwinder 101 , may be used.

[0111] As an example, the substrate supply device 1 may include an unwinder 101, which is used to support the base material and unwind the substrate. Optionally, the unwinder 101 includes: a frame, an unwinding tray (unwinding roller), a damping device, and a deviation correction device. The unwinding tray, the damping device, and the deviation correction device may be arranged on the frame; the frame may be used to support the unwinding tray; the unwinding tray may be used to support the substrate coil and unwind it continuously; the damping device may be used to adjust the unwinding speed of the substrate coil; and the deviation correction device may be used to adjust the lateral deviation of the substrate so that the unwinding substrate remains in longitudinal motion.

[0112] It should be understood that the unwinding machine 101 can be a conventional structure in the art, and its structure includes but is not limited to the above. Its specific structural settings and working principles are well known in the art and will not be repeated here.

[0113] In some embodiments, in order to prepare the sol, a sol preparation device 2 is provided. The sol preparation device 2 can be provided at one side of the glue coating machine 4 to prepare the sol and supply the sol to the glue coating machine 4 .

[0114] Optionally, the sol preparation device 2 includes a first stirring tank 201, a first metering pump, a first weighing component 202 and a first detection component, the first metering pump is connected to the feed port of the first stirring tank 201, and the first weighing component 202 and the first detection component are respectively installed on the first stirring tank 201.

[0115] In the sol preparation device 2, the first stirring tank 201 can be used to stir and mix the materials to prepare the sol; the first stirring tank 201 can be provided with at least one (preferably multiple) feed port, and the feed port of the first stirring tank 201 can be connected to the first metering pump, and the first metering pump can be used to meter and feed the materials according to the ratio requirements. Optionally, the first metering pump can be a gear metering pump, which can be driven by a servo motor. Further, the first weighing component 202 (such as a weighing sensor) can also be installed on the first stirring tank 201, and the first weighing component 202 is installed on the first stirring tank 201, and it is used to meter and feed the materials according to the ratio requirements. The first detection component can also be provided inside the first stirring tank 201, and the first detection component can include a pH meter probe, a temperature sensor, etc.; by providing a pH meter probe in the first stirring tank 201, it can be used to monitor the pH value, and by providing a temperature sensor in the first stirring tank 201, it can be used to monitor the temperature in the first stirring tank 201.

[0116] Therefore, by setting up the above-mentioned sol preparation device 2, by accurately weighing the amount of each material added and monitoring the environmental conditions and process parameters for preparing the sol, the quality consistency of each batch of sol prepared can be ensured, thereby improving the qualified rate of the product.

[0117] In some embodiments, in order to prepare the polycondensation material, a polycondensation material preparation device 3 is provided. The polycondensation material preparation device 3 can be provided at one side of the glue coating machine 4 to prepare the polycondensation material and supply the polycondensation material to the glue coating machine 4 .

[0118] Optionally, the condensation material preparation device 3 includes a second stirring tank 301, a second metering pump, a feeding mechanism 302, a second weighing component 303, a second detection component and a first ultrasonic vibration mechanism. The second metering pump and the feeding mechanism 302 are respectively connected to the feed port of the second stirring tank 301, and the second weighing component 303 and the second detection component are respectively installed on the second stirring tank 301; the first ultrasonic vibration mechanism is arranged in the second stirring tank 301, and is used to evenly disperse the condensation material and heat the condensation material.

[0119] Optionally, the polycondensation material may include a polycondensation agent, a sunscreen and a phase change heat storage material. The polycondensation agent forms a catalytic sol by acting on the sol, which is used to adjust and form a gel body with specific nanoscale three-dimensional network structure characteristic parameters. The sunscreen is used to reduce the infrared radiation of the aerogel composite sheet at high temperature, thereby playing a high-temperature heat insulation role. The phase change heat storage material utilizes its own phase change heat storage effect to store part of the heat generated by the aerogel composite sheet during thermal runaway.

[0120] In the polycondensation material preparation device 3, the second stirring tank 301 can be used to stir and mix the polycondensation agent, the sunscreen agent and the phase change heat storage material transported into the second stirring tank 301, so as to prepare a polycondensation agent mixed solution containing the sunscreen agent and the phase change heat storage material. The second stirring tank 301 can be provided with at least one feed port, and the feed port of the second stirring tank 301 can be connected to a second metering pump, which can be used to transport the metered polycondensation agent to the second stirring tank 301 through the provision of the second metering pump; optionally, the second metering pump can be a gear metering pump. Further, the second stirring tank 301 can also be connected to a feeding mechanism 302, which is a feeding machine for sunscreen and phase change heat storage materials, which can be driven by a servo motor and is used to add sunscreen powder and phase change heat storage materials, wherein the sunscreen can be at least one of titanium dioxide, silicon carbide, zirconium oxide, yttrium oxide, carbon black, potassium titanate whisker, vermiculite, magnesium hydroxide, aluminum hydroxide or calcium carbonate, wherein the phase change heat storage material can be at least one of inorganic phase change heat storage materials, organic phase change heat storage materials and composite phase change heat storage materials (as an example, inorganic phase change heat storage materials include crystalline hydrated salts and molten salts; organic phase change heat storage materials include waxes; composite phase change heat storage materials include capsules, composite porous matrixes, inorganic nanocomposites, organic nanocomposites, etc.). Optionally, the feeding mechanism 302 can select a screw feeder. Furthermore, a second weighing component 303 (such as a weighing sensor) can be installed on the second stirring tank 301. By installing the second weighing component 303 such as a weighing sensor on the second stirring tank 301, it can be used to accurately weigh the amount of the added polycondensation agent, sunscreen agent and phase change heat storage material. Further, a second detection component can be set inside the second stirring tank 301. Optionally, the second detection component can include a pH meter probe, a temperature sensor, etc.; by setting a pH meter probe in the second stirring tank 301, it can be used to monitor the pH value, and by setting a temperature sensor in the second stirring tank 301, it can be used to monitor the temperature in the second stirring tank 301. Further, a first ultrasonic vibration mechanism can be set in the second stirring tank 301. Through the setting of the first ultrasonic vibration mechanism, it can be used to evenly disperse the sunscreen agent and phase change heat storage material added to the polycondensation agent, and heat the mixed liquid to the required temperature.

[0121] Therefore, by setting up the above-mentioned polycondensation material preparation device 3, a polycondensation material with good quality can be obtained, which helps to improve the consistency of the product.

[0122] It should be pointed out that in the present application, the specific structures or types of weighing components such as weighing sensors, detection components such as temperature sensors, pH meter probes, ultrasonic vibration mechanisms and other device components can all refer to the prior art, and this embodiment does not limit the specific structural forms of these components.

[0123] In some embodiments, the provided glue coating machine 4 is a fast glue coating machine, which can be used to transport the catalytic sol (a mixed material of the sol and the polycondensation material) under a certain pressure, quickly mix it online, and quickly immerse it into the substrate. In the embodiment of the present application, the glue coating machine 4 includes a sol pressurizing device 401, a polycondensation material pressurizing device 402, a mixing device 403 and a glue coating device 404, wherein the glue coating device 404 includes a glue coating component 442 and a negative pressure mechanism 443, and preferably, the glue coating device 404 also includes a glue coating pressurizing mechanism 441. That is, in a preferred embodiment, the glue coating device 404 includes a glue coating pressurizing mechanism 441, a glue coating component 442 and a negative pressure mechanism 443.

[0124] Specifically, the discharge port of the above-mentioned sol preparation device 2 can be connected to the inlet of the sol pressurizing device 401, the discharge port of the above-mentioned condensation material preparation device 3 is connected to the inlet of the condensation material pressurizing device 402, the discharge port of the sol pressurizing device 401 and the discharge port of the condensation material pressurizing device 402 are respectively connected to the inlet of the mixing device 403; the discharge port of the mixing device 403 is connected to the feed port of the glue pressurizing mechanism 441, and the discharge port of the glue pressurizing mechanism 441 is connected to the glue coating component 442, the glue coating component 442 is used to combine the mixed liquid (catalytic sol) containing the sol and the condensation material with the substrate, and the negative pressure mechanism 443 is used to generate a negative pressure area on the substrate.

[0125] The sol pressurizing device 401 is used to pressurize and heat the output sol and monitor the physical properties of the sol. Optionally, the sol pressurizing device 401 includes a sol intermediate tank, a first pressurizing pump 411, a first mixing and heating mechanism and a third detection component, the discharge port of the sol preparation device 2 is connected to the inlet of the sol intermediate tank, and the discharge port of the sol intermediate tank is connected to the first pressurizing pump 411; the first mixing and heating mechanism and the third detection component are respectively arranged in the sol intermediate tank, and are respectively used to mix, heat and detect the sol.

[0126] The above-mentioned polycondensation material pressurizing device 402 can be used to output the pressurized and heated polycondensation agent mixed solution containing the sunscreen and the phase change heat storage material and monitor the physical property indicators. Optionally, the polycondensation material pressurizing device 402 includes a polycondensation material intermediate tank 421, a second pressurizing pump 422, a second mixing and heating mechanism and a fourth detection component, the discharge port of the polycondensation material preparation device 3 is connected to the inlet of the polycondensation material intermediate tank 421, and the discharge port of the polycondensation material intermediate tank 421 is connected to the second pressurizing pump 422; the second mixing and heating mechanism and the fourth detection component are respectively arranged in the polycondensation material intermediate tank 421, and are respectively used to mix, heat and detect the polycondensation material.

[0127] Optionally, in the sol pressurizing device 401 and the polycondensation material pressurizing device 402 , the first pressurizing pump 411 and the second pressurizing pump 422 may both be plunger diaphragm pumps.

[0128] Optionally, in the sol pressurizing device 401 and the condensation material pressurizing device 402, the first mixing heating mechanism and the second mixing heating mechanism can both adopt ultrasonic vibration devices, that is, the first mixing heating mechanism and the second mixing heating mechanism are the second ultrasonic vibration mechanism and the third ultrasonic vibration mechanism respectively.

[0129] Optionally, the sol pressurizing device 401 further includes a first cleaning mechanism for cleaning the sol pressurizing device 401 and a first online flow meter 412 for online metering of sol content.

[0130] Optionally, the polycondensation material pressurizing device 402 further includes a second cleaning mechanism for cleaning the polycondensation material pressurizing device 402 and a second online flow meter for online metering of the polycondensation material content.

[0131] Thus, in the embodiment of the present application, the sol pressurizing device 401 mainly includes a sol intermediate tank, a first pressurizing pump 411, a first mixing and heating mechanism, a third detection component, a first cleaning mechanism and a first online flow meter 412. Among them, the sol intermediate tank can be used as a container for continuously storing sol at a constant volume, and a vibrating rod of an ultrasonic vibration device, a detection instrument, etc. are provided on the container. The first pressurizing pump 411 can be a plunger diaphragm pump, which can be used to pressurize the output sol and keep the sol under pressure to be transported to the mixer. The first mixing and heating mechanism can be an ultrasonic vibration device, which can be used to heat the sol in situ to quickly output a sol at 40 to 55°C; optionally, the ultrasonic vibration device includes an ultrasonic generator and a vibrating rod connected to the ultrasonic generator, and the vibrating rod can be inserted into the sol, and the cavitation effect caused by the instantaneous high temperature and high pressure generated by the high-frequency vibration of the ultrasonic wave in the sol is used to quickly mix and heat the sol in situ. The third detection component (detection instrument) may include a temperature sensor, a pH value detector, an ultrasonic level meter, etc., which can be used to monitor the temperature, pH value and liquid level of the sol. The first cleaning mechanism can be arranged on the continuous sol pressurizing device 401 to regularly clean and remove the residual materials in the pressurizing system. The first online flow meter 412 can be arranged on the conveying pipeline to measure the input amount of the pressurized sol online.

[0132] In the embodiment of the present application, the polycondensation material pressurizing device 402 mainly includes a polycondensation material intermediate tank 421, a second pressurizing pump 422, a second mixing and heating mechanism, a fourth detection component, a second cleaning mechanism and a second online flow meter. Among them, the polycondensation agent intermediate tank can be used as a container for constant volume storage of a polycondensation agent mixed liquid containing a sunscreen and a phase change heat storage material, and an ultrasonic vibrating rod, a detection instrument, etc. are provided on the container. The second pressurizing pump 422 can be a plunger diaphragm pump, which is used to pressurize the output polycondensation agent mixed liquid containing a sunscreen and a phase change heat storage material, and keep it under pressure to be transported to the mixing device 403. The second mixing and heating mechanism can be an ultrasonic vibration device, which is used to in-situ heat the polycondensate mixed liquid containing the opacifier and the phase change heat storage material, so as to quickly output the pressurized and heated (40-55°C) polycondensate mixed liquid containing the opacifier and the phase change heat storage material, which can include an ultrasonic generator and a vibrating rod connected to the ultrasonic generator, the vibrating rod is inserted into the polycondensate mixed liquid, and the cavitation effect caused by the instantaneous high temperature and high pressure generated by the high-frequency vibration of the ultrasonic wave in the polycondensate mixed liquid is used to quickly mix and heat the polycondensate mixed liquid in-situ. The fourth detection component (detection instrument) can include a temperature sensor, a pH value detector, an ultrasonic level meter, etc., which can be used to monitor the temperature, pH value and liquid level of the polycondensate mixed liquid. The second cleaning mechanism can be set on the continuous polycondensate mixed liquid pressurizing device, and is used to regularly clean and remove the residual materials in the pressurizing system. The second online flow meter can be set on the conveying pipeline, and is used to measure the input amount of the pressurized polycondensate mixed liquid containing the opacifier and the phase change heat storage material online.

[0133] It should be pointed out that in the present application, the specific structure or type of the cleaning mechanism, online flow meter and other device components can refer to the prior art, as long as they can be used to clean the residual materials in the device, or can realize online flow detection. This embodiment does not limit the specific structural form of these components.

[0134] In the embodiment of the present application, the discharge port of the sol pressurizing device 401 and the discharge port of the polycondensation material pressurizing device 402 are respectively connected to the inlet of the mixing device 403, and the discharge port of the mixing device 403 is connected to the feed port of the glue pressurizing mechanism 441. Optionally, the mixing device 403 includes a static mixer and a third cleaning mechanism for cleaning the static mixer.

[0135] The mixing device 403 of this embodiment is a rapid mixing device, which can be a static mixer. By placing a mixing unit with a specific structure on the pipeline, it is used to promote rapid mixing of the sol and the condensation agent mixture containing the sunscreen in the mixer in the pipeline through the three forces of "division", "conversion" and "reversal".

[0136] The mixing device 403 may further include a third cleaning mechanism. By arranging a cleaning device on the rapid mixing device 403 , the third cleaning mechanism may be used to regularly clean and remove the remaining materials in the mixing device 403 .

[0137] In some embodiments, the glue coating device 404 can be used to pressurize and convey the mixed solution (catalytic sol) of the rapidly mixed sol and the polycondensation agent containing the sunscreen and the phase change heat storage material to the glue coating head for rapid glue coating. The glue coating device 404 preferably includes a glue coating pressurizing mechanism 441, a glue coating component 442 and a negative pressure mechanism 443. Further, the glue coating device 404 can also include a glue coating box 444, a cleaning device and a nitrogen sealing mechanism. In some preferred embodiments, the glue coating device 404 can further include an ultrasonic vibration device while heating during pressurization.

[0138] Specifically, in an embodiment of the present application, a glue pressurizing mechanism 441 is provided, and the glue pressurizing mechanism 441 includes a plunger diaphragm pump. The inlet of the glue pressurizing mechanism 441 can be connected to the mixing device 403, and the outlet of the glue pressurizing mechanism 441 can be provided with a glue coating component 442 such as a glue coating head. The glue pressurizing mechanism 441 can be used to pressurize and transport the catalytic sol and output it to the glue coating head. The glue pressurizing mechanism 441 is preferably a plunger diaphragm pump, and the glue coating head is preferably a porous matrix glue coating head. In this embodiment, the setting of the glue pressurizing mechanism 441 facilitates accurate adjustment of the pressure and glue coating amount of the catalytic sol, but increases the difficulty of cleaning.

[0139] Specifically, in some embodiments, the glue pressurizing mechanism 441 may not be provided, and the mixing device 403 is directly connected to the glue coating component 442 to avoid excessive cleaning.

[0140] In the embodiment of the present application, the opposite ends of the glue coating box 444 are provided with an inlet and an outlet for the substrate to enter and exit, and the negative pressure mechanism 443 and the glue coating component 442 can be located in the glue coating box 444. It can be understood that the glue coating box 444 is a box with four sides sealed, and the opposite ends of the glue coating box 444, such as the left and right side walls of the glue coating box 444, are provided with an inlet and an outlet for the substrate to enter and exit. In the glue coating box 444, the catalytic sol can be immersed into the substrate by the glue coating component 442.

[0141] In the embodiment of the present application, the glue coating component 442 includes a porous matrix glue coating head, which includes multiple groups of tubular glue coating devices. The glue coating head is located inside the glue coating box 444, connected to the glue coating pressurizing mechanism 441 or directly connected to the mixing device 403, and is used to quickly and evenly coat the catalytic sol maintained at a certain pressure on the surface of the moving substrate and immerse it therein. The glue coating head is preferably a narrow hole matrix glue coating head, which is composed of multiple groups of tubular glue coating devices, each of which has N uniformly distributed through holes with an aperture of no more than 1 mm, for quickly and evenly coating the catalytic sol on the substrate. By adopting the narrow hole matrix uniform coating head technology, the sol flowing out of the catalytic sol channel can be coated on the surface of the substrate in small amounts and multiple times to achieve uniform coating, control the dipping speed, significantly improve the dipping effect, and accurately control the output dipping amount. The sol pool in conventional applications can also be eliminated, the amount of sol used in production can be greatly reduced, the cost of raw materials can be saved, the utilization rate of the sol can be greatly improved, and the scrap rate of the sol can be greatly reduced.

[0142] In the embodiment of the present application, the negative pressure mechanism 443 can be used to generate a negative pressure zone in the substrate to quickly immerse the catalytic sol into the substrate. Optionally, the negative pressure mechanism 443 includes a negative pressure generator and a negative pressure distribution member connected to the negative pressure generator, the negative pressure distribution member is located in the coating box 444, and the negative pressure distribution member is arranged on the upper side and / or lower side of the substrate such as the fiber felt, such as the negative pressure distribution member can be arranged on the upper side or lower side of the fiber felt.

[0143] The negative pressure uniform distribution member is used to continuously and quickly absorb the catalytic sol flowing out of the coating head into the substrate. The negative pressure uniform distribution member can be arranged above or below the substrate. The negative pressure uniform distribution member is provided with N uniform through holes on the surface of the uniform distribution plate for contacting the substrate, and is connected to the negative pressure generator. When the negative pressure uniform distribution member is arranged above the surface of the substrate, it needs to be arranged close to the coating head, and a local negative pressure zone is formed on the surface layer of the substrate, which promotes the driving force for the catalytic sol coated on the surface of the substrate to immerse into the negative pressure zone, greatly promotes the immersion speed of the catalytic sol into the substrate, and ensures the fullness of the immersion. At this time, an ultrasonic vibration device can be arranged below the substrate to in-situ heat the temperature of the catalytic sol immersed in the substrate while coating the glue, in order to improve the penetration ability of the catalytic sol, and eliminate the bubbles that remain in the substrate due to the catalytic sol not being discharged in time during the immersion process in the substrate, so as to improve the immersion effect. When the negative pressure uniform distribution member is arranged below the surface of the substrate, a local negative pressure zone is formed in the substrate, which significantly increases the driving force for dipping the glue into the substrate. This effect is the best, but the amount of sol is relatively large. In this case, a separate ultrasonic vibration box needs to be set in the forward direction of the substrate outside the glue coating box 444.

[0144] In the embodiment of the present application, the gluing device 404 also includes an ultrasonic vibration device, that is, a fourth ultrasonic vibration mechanism 445, which is arranged in the gluing box 444 and below the substrate after the gluing; in this case, the negative pressure uniform distribution member is arranged above the surface of the substrate. In addition, the fourth ultrasonic vibration mechanism 445 can also be arranged outside the gluing box 444 and in the forward direction of the substrate, in which case the negative pressure uniform distribution member is arranged below the surface of the substrate. Thus, the fourth ultrasonic vibration mechanism 445 of the present application can be arranged below the substrate after the gluing inside the gluing box 444, or a separate fourth ultrasonic vibration mechanism 445 can be arranged in the forward direction of the substrate outside the gluing box 444.

[0145] A fourth ultrasonic vibration mechanism 445 is arranged inside the glue coating box 444 below the substrate after dipping in glue, for in-situ heating of the catalytic sol immersed in the substrate, in order to improve the penetration ability of the sol and remove the bubbles remaining in the substrate due to the catalytic sol not being discharged in time during the dipping process in the substrate, thereby improving the dipping effect. It may include an ultrasonic generator and a vibration rod.

[0146] Optionally, the glue coating device 404 may further include a first nitrogen sealing mechanism 446 and a second nitrogen sealing mechanism 447, which are respectively located at the inlet side and the outlet side of the glue coating box 444. For example, the first nitrogen sealing mechanism 446 is arranged near the inlet side of the glue coating box 444, and the second nitrogen sealing mechanism 447 is arranged near the outlet side of the glue coating box 444. The arrangement of the nitrogen sealing mechanism can be used to prevent the steam in the box from escaping out of the box.

[0147] Optionally, the glue coating device 404 may further include a fourth cleaning mechanism, which may be used to clean residual materials in the glue coating device 404 , and the specific structure thereof is not limited.

[0148] Therefore, based on the above settings, the present application adopts sol pressurization, condensation material pressurization and pressure continuous feeding rapid mixing technology, and continuously pumps the sol and the condensation material into a mixing device 403 such as a static mixer under a certain pressure (such as 0.1-7MPa pressure) for rapid, continuous and uniform mixing, and maintains a certain pressure through the glue coating pressurization mechanism 441 and / or the glue coating component 442 to generate a catalytic sol with a certain pressure (about 0.1-7MPa), which can quickly penetrate into the pores of the substrate. In addition, a negative pressure mechanism 443 is also used, which can be used to form a local negative pressure area on the surface and / or inside of the substrate, significantly increasing the driving force for dipping, promoting the catalytic sol of a certain pressure flowing out of the coating component 442 to further quickly penetrate into the substrate such as fiber felt, greatly promoting the speed and depth of the catalytic sol penetrating into the substrate, and ensuring the fullness of the dipping, so the substrate can be increased in the dipping process. The existing tape speed of 2M / min is increased to a tape speed of more than 20M / min, significantly improving the dipping efficiency. Thus, while maintaining a certain pressure of coating and the synergistic effect of negative pressure attraction in the substrate, the effect of continuous and rapid dipping of the catalytic sol on the substrate can be achieved, the consistency of the dipping quality and product performance is ensured, a higher yield is obtained, the surface quality of the product can be improved, the aerogel filling rate is improved, the dipping depth of thicker substrates (such as fiber substrates exceeding 2mm) is guaranteed, and the effect of high consistency of thickness of the aerogel composite sheet can be achieved. In addition, since the commonly used immersion tank in the prior art can be omitted, the amount of sol used is greatly saved and the production cost is reduced.

[0149] That is, the present application can improve the filling rate of the catalytic sol through the setting of the above-mentioned glue coating machine 4, ensure the consistency of the dipping quality and product performance, improve the surface quality of the product, and lay a solid foundation for achieving high consistency in the thickness of the aerogel composite sheet; further, the present invention also sets a gel thickness setting device 5, which includes a double-belt rolling mechanism 502, which can effectively control the thickness of the composite gel. Therefore, through the coordinated setting of the above-mentioned glue coating machine 4 and the gel thickness setting device 5, the problem that the current aerogel composite sheet production system is difficult to ensure the consistency of the thickness of the aerogel composite sheet can be effectively alleviated, the thickness consistency of the aerogel composite sheet can be improved, the surface quality can be improved, and the production efficiency is relatively high.

[0150] In some embodiments, the gel thickness setting device 5 can be used to control the thickness of the substrate after the dip in the gelatinization process. Optionally, the gel thickness setting device 5 includes a pre-gel box 501 and a double-belt roller gel thickness setting machine.

[0151] Specifically, in the embodiment of the present application, the gel thickness determination device 5 includes a double-belt rolling mechanism 502, and the double-belt rolling mechanism 502 includes a first rolling mechanism 521 and a second rolling mechanism 522 respectively located on the two side surfaces of the substrate after the dip in the glue. For example, the first rolling mechanism 521 can be arranged on the upper side of the substrate after the dip in the glue, and the second rolling mechanism 522 can be arranged on the lower side of the substrate after the dip in the glue.

[0152] Optionally, the gel thickness determination device 5 further includes a pre-gel box 501. Along the direction of substrate conveying, the glue coating machine 4, the pre-gel box 501, the double-belt roller pressing mechanism 502, the aging device 6 and the slicer 7 are sequentially arranged. The pre-gel box 501 is provided with an inlet and an outlet at opposite ends for the substrate after the glue dip; the inlet side and the outlet side of the pre-gel box 501 are provided with a third nitrogen sealing mechanism 505 and a fourth nitrogen sealing mechanism, respectively.

[0153] Optionally, the gel thickness setting device 5 also includes a gel thickness setting box 503, and the opposite ends of the gel thickness setting box 503 are provided with an inlet and an outlet for the substrate after being dipped in glue, and the inlet side and the outlet side of the gel thickness setting box 503 are respectively provided with a nitrogen sealing mechanism; the first rolling mechanism 521 and the second rolling mechanism 522 are located in the gel thickness setting box 503; and a fifth detection component is provided in the gel thickness setting box 503.

[0154] In the embodiment of the present application, the gel thickness setting device 5 mainly includes a pre-gel box 501 and a double-belt roller gel thickness setting machine, and can further include a nitrogen sealing device, etc. Among them, the double-belt roller gel thickness setting machine includes a gel thickness setting box 503, a double-belt roller mechanism 502, detection instruments and equipment, etc., wherein the double-belt roller mechanism 502 and the detection instruments and equipment can be arranged in the gel thickness setting box 503, and the process of sol-to-gel transformation can be realized in the gel thickness setting box 503, that is, the process of catalytic sol-to-gel transformation after rapid dipping can be realized, and the thickness of the composite gel body can be shaped and determined at the same time. Along the direction of material transportation, the above-mentioned glue coating machine 4, pre-gel box 501, double-belt roller gel thickness setting machine, aging device 6 and slicer 7 are arranged in sequence.

[0155] Optionally, a visual inspection box 504 may be provided between the glue coating machine 4 and the pre-gel box 501 .

[0156] Among them, in the above-mentioned gel thickness determination device 5, the pre-gel box 501 is a box sealed on all sides, and the opposite ends of the pre-gel box 501 are provided with an inlet and an outlet for the substrate after dipping in the gel; for example, the left wall of the pre-gel box 501 is provided with an inlet for the substrate after dipping in the gel, and the right wall of the pre-gel box 501 is provided with an outlet for the substrate after dipping in the gel. Through the setting of the pre-gel box 501, it can be used to obtain the gel nucleation incubation time for the catalytic sol immersed in the substrate. There is a nitrogen sealing device (nitrogen sealing mechanism) at the inlet and outlet of the pre-gel box 501. For example, a third nitrogen sealing mechanism 505 can be set near the inlet side of the pre-gel box 501, and a fourth nitrogen sealing mechanism can be set near the outlet side of the pre-gel box 501. The setting of the nitrogen sealing mechanism can be used to prevent the steam in the box from escaping out of the box.

[0157] In the above-mentioned gel thickness setting device 5, the matrix material after dipping output from the pre-gel box 501 can enter the gel thickness setting box 503. The gel thickness setting box 503 is a box sealed on all sides, and the opposite ends of the gel thickness setting box 503 are provided with an inlet and an outlet for the substrate after dipping to enter and exit; for example, the left side wall of the gel thickness setting box 503 is provided with an inlet for the substrate after dipping to enter, and the right side wall of the gel thickness setting box 503 is provided with an outlet for the substrate after dipping to exit. The inlet side and the outlet side of the gel thickness setting box 503 are respectively provided with nitrogen sealing mechanisms, and the setting of the nitrogen sealing mechanisms can prevent air from entering and steam from leaking out. For example, a fourth nitrogen sealing mechanism can be set near the inlet side of the gel thickness setting box 503, and a fifth nitrogen sealing mechanism 506 can be set near the outlet side of the gel thickness setting box 503, that is, the fourth nitrogen sealing mechanism is set between the outlet of the pre-gel box 501 and the inlet of the gel thickness setting box 503. Alternatively, in other embodiments, a nitrogen sealing mechanism may be provided at the outlet side of the pre-gel box 501 , and another nitrogen sealing mechanism may be provided at the inlet side of the gel thickness setting box 503 .

[0158] In the gel thickness setting device 5, the double-belt rolling mechanism 502 is located in the gel thickness setting box 503, and is used to set the thickness of the composite gel body during the transition of the catalytic sol to gel after rapid dipping. Optionally, the double-belt rolling mechanism 502 includes a first rolling mechanism 521 and a second rolling mechanism 522, and may also include a frame and a height adjustment mechanism.

[0159] The first rolling mechanism 521 , the second rolling mechanism 522 and the height adjustment mechanism can all be arranged on a frame, and the frame can be used to install and support the first rolling mechanism 521 , the second rolling mechanism 522 and the height adjustment mechanism.

[0160] Optionally, the first rolling mechanism 521 includes a first active roller, a first passive roller, a first pressing plate (or a first supporting plate) and a first rolling belt, the first active roller and the first passive roller drive the first rolling belt to move, and the first rolling belt is connected to the first pressing plate; the second rolling mechanism 522 includes a second active roller, a second passive roller, a second pressing plate (or a second supporting plate) and a second rolling belt, the second active roller and the second passive roller drive the second rolling belt to move, and the first rolling belt is connected to the first pressing plate. In the embodiment of the present application, the first rolling mechanism 521 and the second rolling mechanism 522 can be respectively located on the upper and lower surfaces of the substrate after the dip, and are used to press the upper and lower surfaces of the substrate containing the catalytic sol through the upper and lower rollers, and maintain the required gap thickness between the upper and lower rollers according to the set thickness requirements. The above-mentioned first rolling mechanism 521 includes a first active roller, a first passive roller and a first pressure plate (or a first support plate), that is, the upper rolling mechanism includes an upper active roller, an upper passive roller and an upper pressure plate (or an upper support plate), and the above-mentioned second rolling mechanism 522 includes a second active roller, a second passive roller and a second pressure plate (or a second support plate), that is, the lower rolling mechanism includes a lower active roller, a lower passive roller and a lower pressure plate (or a lower support plate). Therefore, through the setting of the upper and lower active rollers and the upper and lower passive rollers, it can be used to drive the movement of the upper and lower rolling belts, maintain a certain flatness, and form a pre-set height between the upper and lower rolling belts. Furthermore, the above-mentioned first rolling mechanism 521, i.e., the upper rolling mechanism, also includes a first rolling belt, i.e., the upper rolling belt, and the above-mentioned second rolling mechanism 522, i.e., the lower rolling mechanism, also includes a second rolling belt, i.e., the lower rolling belt. The first rolling belt connects the first active roller, the first passive roller and the first pressure plate (or the first support plate), and the second rolling belt connects the second active roller, the second passive roller and the second pressure plate (or the second support plate). The upper and lower rolling belts can be driven to move by the upper and lower active rollers and the upper and lower passive rollers.

[0161] It should be understood that in order to drive the first active roller and the second active roller to move, a driving mechanism or a transmission mechanism is also included, such as an upper and lower pressure roller transmission device for providing power for the upper and lower active and passive rollers to move, which can be driven by a motor, etc. It should be pointed out that the specific structure or form of the driving mechanism or the transmission mechanism is not limited in this embodiment, and a device such as a motor that can be used to drive the pressure roller to move, which is well known in the art, can be used.

[0162] Optionally, the first rolling mechanism 521 and the second rolling mechanism 522 are respectively connected to a height adjustment mechanism; through the setting of the height mechanism, it can be used to adjust the flatness and height between the first rolling mechanism 521 and the second rolling mechanism 522. Optionally, the height adjustment mechanism may include a servo motor, an electric cylinder, a grating ruler, etc., and the servo motor adjusts the up and down movement of the electric cylinder lead screw and drives the up and down movement of the grating ruler. The displacement between the first rolling mechanism 521 and the second rolling mechanism 522 is measured by the grating ruler, so as to achieve the purpose of adjusting the height between the first rolling mechanism 521 and the second rolling mechanism 522.

[0163] Optionally, the gel thickness setting box 503 is provided with a detection instrument, that is, a fifth detection component is provided in the gel thickness setting box 503. The fifth detection component may be, for example, a temperature sensor, a gas concentration sensor, etc., which can be used to detect the temperature and gas concentration in the gel thickness setting box 503.

[0164] Therefore, the present application, through the setting of the above-mentioned gel thickness setting device 5, uses double-belt roller pressing to apply surface pressure on the upper and lower surfaces of the substrate after the fiber composite gel felt is impregnated with glue. The pressure applied is more uniform than that applied by general roller pressing, and is more conducive to controlling the thickness, thereby helping to improve the thickness consistency of the sheet-type aerogel composite material composite sheet.

[0165] In some embodiments, the material outputted by the gel thickness determination device 5 may enter the aging device 6, that is, the continuous composite gel body obtained after thickness determination by the gel thickness determination device 5 may enter the aging device 6 for aging.

[0166] Optionally, the aging device 6 can be a microwave aging device, which can be used to perform online continuous rapid aging on the continuous composite gel. The microwave aging device includes an aging box, a microwave heating mechanism, a cooling mechanism and a nitrogen sealing mechanism; further, it can also include detection instruments and equipment.

[0167] Among them, the aging box is a box sealed on all sides. The aging box can be made of plastic material. The opposite ends of the aging box are provided with an inlet and an outlet for continuous composite gel to enter and exit; for example, the left wall of the aging box is provided with an inlet for continuous composite gel to enter continuously, and the right wall of the aging box is provided with an outlet for continuous composite gel to be continuously output.

[0168] Among them, the microwave heating mechanism can be used to generate microwave energy, which interacts with polar molecules such as water and alcohol solvents in the composite gel, absorbs microwave energy and converts it into thermal energy, thereby realizing in-situ rapid heating of the continuous composite gel. It has the characteristics of fast heating speed, high thermal efficiency, uniform heating, selective heating, energy saving and environmental protection, and easy control.

[0169] Optionally, the microwave heating mechanism includes a microwave generator and a waveguide. Among them, the microwave generator can be used to generate microwave energy, such as the microwave generator can include a solid-state microwave source or a magnetron. The waveguide can be used to transmit the microwave energy generated by the microwave generator to the aging box, and the waveguide ports are respectively placed at the upper and lower positions outside the aging box, and the microwave energy is quickly transmitted to the continuous composite gel in the aging box, and the in-situ rapid heating and uniform heating are performed to achieve the aging process of the continuous composite gel. Through the interaction of microwave energy with polar molecules such as water and alcohol solvents in the composite gel, the microwave energy is absorbed and converted into heat energy, and the composite gel is quickly heated in situ, so that more Si-O-Si can be quickly bonded, and the wet gel network structure in the composite gel is more stably formed, thereby improving the mechanical property stability of the composite gel. Optionally, by controlling the temperature of the composite gel in the range of 55-65°C and aging for 20-60min, the microporous structure of the gel can be reduced, the optimal pore structure can be enhanced, the permeability of the liquid phase in the gel and the mechanical properties of the gel can be increased, and the effect of strengthening the gel skeleton can be achieved.

[0170] The cooling mechanism is a circulating condensation mechanism, which can be used to condense and recover the vapors of alcohol solvents and the like generated in the aging box to prevent them from escaping from the two ends of the aging box. The cooling mechanism can adopt conventional technology.

[0171] Optionally, the aging device 6 may further include a transmission mechanism, which can be used to transmit the continuous composite gel in the aging box to achieve continuous aging of the composite gel. The embodiment of the present application does not limit the specific structure of the transmission mechanism, and a conventional device structure that can be used to transmit the composite gel in the art can be used.

[0172] Optionally, the aging box is provided with detection instruments and equipment, that is, a sixth detection component is provided in the aging box. The sixth detection component can be, for example, a sensor such as a visual sensor, a gas concentration sensor, an arc light sensor, etc., to ensure the safety in the aging box; these detection components are all conventional technologies.

[0173] Optionally, a nitrogen sealing mechanism may be provided at the inlet and outlet of the aging box, and the setting of the nitrogen sealing mechanism can be used to prevent steam from escaping out of the box. For example, a sixth nitrogen sealing mechanism may be provided near the inlet side of the aging box, and a seventh nitrogen sealing mechanism 601 may be provided near the outlet side of the aging box, that is, the sixth nitrogen sealing mechanism is provided between the outlet of the slicer 7 and the inlet of the aging box. Alternatively, in other embodiments, a nitrogen sealing mechanism may be provided at the outlet side of the slicer 7, and another nitrogen sealing mechanism may be provided at the inlet side of the aging box.

[0174] In some embodiments, the material outputted by the aging device 6 may enter a slicer 7 and be sliced ​​by the slicer 7 (also called a slitting machine). The present application can be used to cut the aged continuous composite gel obtained from the base material according to size requirements through the setting of the slicer 7.

[0175] It should be pointed out that the embodiment of the present application does not limit the specific structural form of the slicer 7, as long as it can be used to cut the composite sheet according to a preset size.

[0176] As an example, the slicer 7 may include a cutting box 701 , a cross-cutting mechanism 702 , and a nitrogen sealing mechanism; and more preferably, it also includes a longitudinal cutting mechanism 703 .

[0177] Optionally, the slitting box 701 can be a box sealed all around for sealing the slitting equipment, and the opposite ends of the slitting box 701 can be provided with inlet and outlet ports. Optionally, the cross-cutting device can be used to cut the continuous composite gel body into composite gel sheets of a certain length according to the required requirements. Optionally, the longitudinal cutting device can be used to cut the continuous composite gel body into composite gel sheets of multiple strips according to the required size requirements. Optionally, there can be a nitrogen sealing mechanism at the inlet and outlet of the slitting box 701, such as the nitrogen sealing mechanism can include an upper nitrogen air knife device and a lower nitrogen air knife device, and the setting of the nitrogen sealing mechanism can be used to prevent steam from escaping out of the box. For example, a fifth nitrogen sealing mechanism 506 can be set on the inlet side close to the slitting box 701, and a sixth nitrogen sealing mechanism can be set on the outlet side close to the slitting box 701, that is, the fifth nitrogen sealing mechanism 506 is set between the outlet of the gel thickness setting box 503 and the inlet of the slitting box 701. Alternatively, in other embodiments, a nitrogen sealing mechanism may be provided at the outlet side of the gel thickness setting box 503 , and another nitrogen sealing mechanism may be provided at the inlet side of the slitting box 701 .

[0178] Optionally, the slicer 7 may further include a transmission mechanism, which can be used to transmit the composite gel sheet in the cutting box 701. The embodiment of the present application does not limit the specific structure of the transmission mechanism, which may or may not be provided, and a conventional device structure in the art that can be used to transmit the composite gel sheet can be used.

[0179] It should be understood that the embodiment of the present application exemplarily lists the structure of the slicer 7, and the specific structures of the cross-cutting device, the longitudinal cutting device, etc. can all adopt structures known in the art, which are not limited in the present application and will not be described in detail. In addition, in other embodiments, the slicer 7 can also adopt other structural forms known in the relevant field.

[0180] In some embodiments, the composite gel body of a preset size obtained after being cut by the slicer 7 can enter the solvent replacement device 9 for solvent replacement.

[0181] Optionally, in some cases, the composite gel body of a preset size obtained after being cut by the slicer 7 can pass through the sheet framing device 8 (composite gel sheet arrangement and conveying device) and then enter the solvent replacement device 9. That is, along the direction of conveying the fiber substrate, the glue coating machine 4, the gel thickness setting device 5, the aging device 6, the slicer 7, the sheet framing device 8 and the solvent replacement device 9 can be arranged in sequence. Among them, the sheet framing device 8 can be used to cross-place the composite gel sheet and the spacer in the material box 8111 until the material box 8111 is filled, and multiple groups of material boxes are stacked into groups, and the multiple stacked material box groups are assembled in a material frame and conveyed to the next process.

[0182] In some embodiments, the sheet framing device 8 includes a material box framing machine 801 and a turning machine 802 .

[0183] Optionally, the material box assembly machine 801 can be used to cross-place the composite gel sheets and the spacers in the material box 8111 to form a material box group. The material box assembly machine 801 can include a material box machine 811 and an assembly machine 812, wherein the material box machine 811 can be used to alternately load the spacers and the composite gel sheets into the material box 8111, and the spacers have flow channels and separate the gel sheets, providing the required flow channels for the subsequent solvent replacement and supercritical drying processes, thereby achieving uniform and efficient replacement and supercritical drying.

[0184] Optionally, the material box machine 811 includes a material box 8111, a gel sheet conveying mechanism 8112, a spacer conveying mechanism 8113, a grasping robot 8114 and a material box conveying mechanism 8115. The grasping robot 8114 is arranged on one side of the gel sheet conveying mechanism 8112 or the spacer conveying mechanism 8113, and is used to grasp the spacers and the sliced ​​composite gel sheets respectively, and place the spacers and the composite gel sheets alternately in the material box 8111. The material box conveying mechanism 8115 is arranged on one side of the material box 8111, and is used to transfer the material box 8111 (a material box filled with composite gel sheets and spacers) containing the alternately placed sliced ​​composite gel sheets and spacers to the frame assembly machine 812.

[0185] In the above-mentioned material box machine 811, the material box 8111 can be used to load spacers and composite gel sheets. The spacers and composite gel sheets are placed in the material box 8111 in the following manner: one spacer, one composite gel sheet, one spacer, one composite gel sheet..., and are placed alternately in this way. Optionally, the material box 8111 can be a porous material box, the upper part of the material box is open, and a material box cover is provided on the material box 8111, and the material box body and the material box cover can both be porous. Optionally, the material box 8111 can be surrounded by a stainless steel mesh plate. Optionally, in order to facilitate the combination of multiple material boxes 8111 and the positioning of the material box 8111, a material box positioning portion 8011 can be provided at the four corners of the material box 8111. Optionally, in order to facilitate the up and down movement and positioning of the material box 8111, a material box lifting pin hole 8012 can be provided on the side wall of the material box 8111.

[0186] Thus, in the embodiment of the present application, the material box 8111 can be surrounded by a stainless steel mesh plate, and the side wall of the material box 8111 can be provided with a positioning mechanism for stacking the upper and lower material boxes 8111 and a pin hole for locking the material box by a lifting structure. In the process of moving the material box 8111 filled with composite gel sheets and spacers (such as moving from bottom to top) (for combining multiple material boxes), the former can be used to position and connect the upper and lower material boxes 8111; the latter is used to insert the lifting pin after lifting the material box 8111, so that the material box 8111 is in the lifting and locking position, and then the lifting mechanism falls back to the initial position to accept the next material box 8111 to enter the lifting position on the line body. After the next material box 8111 enters the initial lifting position, the lifting mechanism can be used to repeatedly lift the next material box 8111, and at the same time, the lifting pin withdraws from the lifting pin hole on the previous material box 8111, ready to be inserted into the lifting pin hole of the next material box 8111.

[0187] In the above-mentioned material box machine 811, the gel sheet transmission mechanism 8112 can be used to transmit the composite aerogel sheet between different workstations. For example, the gel sheet transmission mechanism 8112 can be used to transmit the sliced ​​composite gel sheet to the position corresponding to the material box 8111. Optionally, the gel sheet transmission mechanism 8112 can adopt an existing belt transmission mechanism.

[0188] In the above-mentioned material box machine 811, the spacer transmission mechanism 8113 can be used to transmit the spacers between different workstations. For example, the spacer transmission mechanism 8113 can be used to transmit the cut spacers to the position corresponding to the material box 8111. Optionally, the spacer transmission mechanism 8113 can adopt an existing belt transmission mechanism.

[0189] It should be pointed out that the present application does not limit the specific structural forms of the gel sheet transmission mechanism 8112 and the spacer transmission mechanism 8113, and a conventional transmission mechanism such as a belt conveyor that can be used to transmit gel sheets and spacers can be used.

[0190] In the above-mentioned material box machine 811, the grabbing robot 8114 can be used to grab the spacer and the sliced ​​composite gel sheet respectively, and place the spacer and the composite gel sheet alternately in the material box 8111. For example, the spacer and the composite gel sheet are grabbed by the grabbing robot 8114 and placed in the material box 8111 in sequence from bottom to top, and the material box cover is sealed after the material box 8111 is full. Optionally, the grabbing robot 8114 may include a robot and a grabbing device. The robot in the prior art can realize alternating grabbing, transfer and placement, and this application does not limit this. As an example, the composite gel sheet and the spacer can be grabbed and loaded into the material box 8111 alternately by a truss manipulator or a robot until they are loaded, and the material box 8111 is moved in and out through the line body.

[0191] For example, the robot can use the gripping device on the manipulator to grab and transfer the septum, gel sheet, and material box cover. The gripping device can be used to grab the septum and gel sheet, including a needle-shaped gripper for grabbing the septum and a negative pressure suction cup gripper for grabbing the gel sheet. The manipulator also contains a laser distance sensor to automatically measure the height of the sheet, control the manipulator to accurately grab the septum and gel sheet to achieve alternating placement of the septum and gel sheet, until the material box 8111 is filled and the material box cover is sealed.

[0192] In the above-mentioned material box machine 811, the material box transmission mechanism 8115 (also called the material box queuing machine) can be used to sequentially transmit the material boxes 8111 loaded with spacers and composite gel sheets to the frame assembly machine 812. The material box transmission mechanism 8115 can adopt a conventional mechanism that can be used to transmit material boxes, and this is not limited.

[0193] Optionally, in the material box frame assembly machine 801, the frame assembly machine 812 is used to assemble the material boxes into the material frame. The frame assembly machine 812 includes a material box stacking mechanism 8121 and a material frame assembly mechanism 8122. The material box stacking mechanism 8121 is located downstream of the material box transmission mechanism 8115 and is used to stack multiple material boxes into a stack to form a material box assembly; the material frame assembly mechanism 8122 is located downstream of the material box stacking mechanism 8121 and is used to load the material box assembly into the material frame.

[0194] In the present application, the material box stacking mechanism 8121 can be used to stack multiple material boxes into a stack. For example, any palletizer that can be used for stacking in the relevant technology can be used to achieve this function. The material frame assembly mechanism 8122 can be used to assemble multiple stacked material boxes into a material frame. The material frame assembly mechanism 8122 may include a material frame, a propulsion device, and a material frame queue machine 803. Among them, the material frame has a horizontal opening for accommodating multiple stacked material boxes 8111, which is convenient for subsequent replacement and supercritical drying processes. The propulsion device is used to push the stacked material boxes from the horizontal opening of the material frame into the material frame in sequence until the entire material frame is filled. The material frame queue machine 803 can be used to transfer the material frame to the flipping device.

[0195] Optionally, the material box stacking mechanism 8121 may include a material box lifting mechanism (used to lift the material box until the lifting pin is inserted), a material box lifting pin (used to lock and support the material box), and a material box conveying mechanism (used to convey the next material box). During the material box stacking process, the material box that has been loaded with materials in the previous process can be conveyed to the position where the material box starts to lift through the line body by the material box conveying mechanism. Then, the lifting mechanism lifts the material box. After it is in place, the lifting pin is inserted into the lifting pin hole of the material box to support the material box. Then, the lifting mechanism falls to the initial lifting position, and is ready to repeat the above process until the stacking of the material box group is completed.

[0196] Optionally, in the process of framing the stacked material boxes, it can be achieved through a material frame conveying mechanism, a stacked material box lifting conveying mechanism, a material frame lifting mechanism, etc. For example, after the stacked material box group is conveyed by the conveying line to the material frame lifting starting position, the lifting mechanism lifts the material box group, and the material frame is inserted into the upper and lower surfaces of the stacked material box group through the material frame conveying mechanism. Then, the lifting mechanism falls back to the initial material frame lifting starting position. The material frame is installed, and it is input to the next workstation to repeat the next process.

[0197] Optionally, the above-mentioned turning machine 802 is used to turn the material frame 90° so that the composite gel sheets are placed in a vertical direction, and the spacers between the composite gel sheets form a flow channel in the up-down direction. Optionally, the turning can be achieved by existing technologies such as hydraulics or robots, that is, the present application does not limit the specific structural form of the turning machine 802, as long as the turning of the material frame can be achieved.

[0198] Optionally, after the material frame is turned over, the material frame can be transferred to the material frame queue machine 803.

[0199] Thus, the present application increases the number of composite gel sheets that can be placed in the replacement device and the supercritical drying device 10 at one time through the arrangement of the sheet framing device 8, and improves the production efficiency of the composite gel composite sheets. In addition, the horizontal framing can reduce the height of the material frame, and avoid the composite gel sheets being squeezed on the composite gel sheets at the bottom of the material box due to the overlapping of multiple layers and their own weight when the composite gel sheets are placed in multiple layers in the material box, resulting in deformation of the composite gel sheets, and ultimately resulting in inconsistent thickness of the produced composite gel sheets, thereby reducing the yield rate. In addition, the material frame is turned over and erected, and the flow channels in the spacer are connected up and down and are roughly distributed along the axial direction of the replacement device or the drying device 10, which facilitates the rapid solvent exchange and solvent extraction of the replacement liquid or the supercritical fluid in the replacement device or the drying device 10, which is beneficial to improve the efficiency of the solvent replacement of the fiber gel sheet in the material frame and the drying efficiency of the carbon dioxide supercritical fluid extraction solvent.

[0200] Furthermore, the material frame flipped 90° is transferred to the replacement tank of the solvent replacement device 9 by a transfer tool 804 (such as an AGV transfer vehicle).

[0201] In the embodiment of the present application, the solvent replacement device 9 can adopt a conventional device structure in the art, which is not limited. As an example, the solvent replacement device 9 can be used to exchange water in the composite gel sheet by an alcohol solvent replacement liquid to obtain an alcohol composite gel sheet. Optionally, the solvent replacement device 9 includes a replacement tank, a circulation pump, and a pipeline. For example, the composite gel sheet can be transported to the replacement tank of the solvent replacement device 9 by a conveying device.

[0202] In some embodiments, the alcohol composite gel sheet obtained after the solvent replacement device 9 may enter the drying device 10 for drying.

[0203] Optionally, the drying device 10 includes a supercritical drying device.

[0204] In the embodiment of the present application, the drying device 10 can adopt the conventional device structure in the field, which is not limited. As an example, the drying device 10 is a supercritical drying device, which pressurizes the liquid carbon dioxide, heats it to a supercritical state, and uses the mutual solubility of the supercritical carbon dioxide fluid to extract the alcohol solvent, and separates the entrained alcohol from the carbon dioxide, and the carbon dioxide condenses into liquid carbon dioxide again. The cycle process is repeated until the extraction work is completed to obtain an aerogel composite sheet. Optionally, the supercritical drying device includes a booster pump, a heat exchanger, a drying kettle, a separation kettle, a filter, a condenser, and a carbon dioxide intermediate storage tank. The composite gel sheet that has completed the replacement in the solvent replacement device 9 can be transported to the supercritical drying device for drying by a transport tool 804 such as a conveyor.

[0205] The aerogel composite sheet obtained after drying by the drying device 10 can be transported to the next station by a conveying device or the like. As an example, the next station can be a drying device and / or a testing workstation, and the testing workstation includes but is not limited to a weighing instrument, a thickness measuring instrument, and a visual inspection instrument. The visual inspection instrument can be an ultraviolet visual inspection instrument to observe the dipping effect of the aerogel composite sheet. The aerogel composite sheet that passes the inspection is the finished product.

[0206] Optionally, the dried material frame can be transferred to the aerogel material frame queue machine 11 by a transfer tool. The aerogel material frame queue machine 11 can be used to transfer to the material frame flipping device 12. The material frame flipping device 12 can be used to flip the material frame 90° to place the material frame opening horizontally so that the gel sheet is placed in a horizontal direction, and the flipping can be achieved by existing technologies such as hydraulics or robots.

[0207] Optionally, a material frame disassembly machine 13, a material box disassembly machine 14, etc. may also be provided. For example, a cylinder mechanism may be used to sequentially pull the stacked material boxes out of the material frame to the material frame disassembly station, and a cylinder mechanism may be used to sequentially push the material boxes in the stacked material boxes to the material box queue machine, and the material frame may be placed at the material frame buffer station, and then transferred to the material frame queue machine by a transfer device for continued use. For example, a manipulator may be used to open the material box cover, and the aerogel sheet and the spacer may be taken out of the material box in sequence, and the aerogel sheet may be placed on the second aerogel sheet queue machine, and the taken-out spacer may be placed at the spacer buffer station, and then transferred to the spacer queue machine by a transfer device for continued use. The material box is placed at the material box buffer station, and then transferred to the first material box queue machine by a transfer device for continued use.

[0208] As an example, after drying, it passes through the aerogel material frame queue machine 11, the material frame turning device 12, the material frame stripping machine 13, the material box stripping machine 14, the aerogel sheet queue machine 15, the aerogel drying device 16, the inspection workstation 17 (including the visual inspection box 171), and the finished product queue machine 18 in sequence.

[0209] It should be pointed out that in the present application, the various detection components involved, such as temperature sensors, gas concentration sensors, etc., are all detection components known in the prior art, and their working principles, connection methods, or structural types are all known in the art. The embodiments of the present application do not limit this and will not be described in detail here.

[0210] It should also be pointed out that in the present application, each nitrogen sealing mechanism involved also adopts a nitrogen sealing device known in the prior art, and the present application does not limit its specific structural form. As an example, by having a nitrogen sealing device at the inlet and outlet of each processing box, it can be used to prevent the steam in the box from escaping outside the box. Optionally, the nitrogen sealing device (nitrogen sealing mechanism) includes an upper nitrogen air knife device and a lower nitrogen air knife device. Among them, the upper nitrogen air knife device is placed on the upper part of the sealing device, and is used to generate a nitrogen curtain downward to prevent the steam in the box from escaping and the air outside the box from entering the box. The lower nitrogen air knife device is placed on the lower part of the sealing device, and is used to generate a nitrogen curtain upward to prevent the steam in the box from escaping and the air outside the box from entering the box.

[0211] When the aerogel composite sheet production system of the present application is used to prepare aerogel composite sheets, the sol preparation device 2 and the condensation material preparation device 3 can be used to prepare the sol and the condensation material respectively; then the matrix material supply device 1 is used to unwind the matrix material roll on the unwinding device; the obtained catalytic sol is quickly immersed in the matrix material by the glue coating machine 4; then, the gel thickness setting device 5 is used to gel and set the thickness under pressure constraint on the double-belt rolling structure; then, the composite gel body is subjected to microwave aging by the aging device 6; the composite gel body obtained after aging is cut into the required size vertically and horizontally by the slicer 7 to obtain a composite gel sheet; then, the solvent replacement device 9 is used to replace the solvent, and the drying device 10 is used to dry.

[0212] Thus, aerogel composite sheets are obtained by continuously unloading the substrate roll, continuously coating the glue, continuously determining the thickness of the gel under pressure, aging, cutting to a certain length, replacing, drying, baking or testing the substrate roll, thereby realizing continuous and automated production of the aerogel composite sheets and improving production efficiency and production scale.

[0213] In summary, the present invention firstly carries out rapid glue coating to the substrate coil, adopts sol pressurization, polycondensation material pressurization and pressure continuous feeding rapid mixing technology, under 0.1-7MPa pressure, continuously pumps the sol and the polycondensation agent containing sunscreen and phase change heat storage material into the static mixer, carries out rapid continuous rapid uniform mixing, and pressurizes by the glue coating pressurization device, produces the catalytic sol of certain pressure, can quickly immerse in the pores of the matrix material. And adopt the negative pressure uniform distribution device of supporting substrate, form a local negative pressure zone in substrate, significantly increase the driving force of dipping, promote the catalytic sol of certain pressure flowing out by the glue coating head to further quickly immerse in substrate, greatly promote the speed and depth of catalytic sol immersion into substrate, and ensure the fullness of dipping, can realize the effect of continuous rapid dipping of catalytic sol on substrate, ensure the consistency of dipping quality and product performance, and obtain higher yield rate. In addition, because the commonly used dipping pool of prior art can be omitted, the usage of sol is also greatly saved, and production cost is reduced.

[0214] Furthermore, by implementing the gel process under the constraint of double-belt roller pressure, the porosity and pore size in the sol can be reduced, the fusion degree of the catalytic sol and the substrate can be improved, the filling amount of the catalytic sol can be increased, and the thermal insulation performance of the aerogel composite sheet can be improved. On the other hand, the surface quality and thickness consistency of the composite gel sheet and the aerogel composite sheet can be greatly improved, the product yield can be significantly improved, the industry's difficulty in controlling the thickness of the aerogel composite sheet can be solved, and the accuracy and consistency of the product thickness and the surface quality and parallelism of the product can be improved.

[0215] The aerogel composite sheet production system provided by the present invention can quickly coat the glue, determine the gel thickness under double-belt roller pressure, and perform online cutting to a certain length after online aging, thereby avoiding the subsequent further cutting process, reducing the generation of scraps, thereby avoiding the waste of aerogel composite materials and saving costs; at the same time, it also avoids the shedding of aerogel powder during the cutting process and avoids dust pollution in the processing environment.

[0216] In addition, the present invention can reasonably place the material box containing the composite gel sheet into the displacement tank and the drying kettle tank through the reasonable spatial layout and flipping setting of the material box and the material frame. Therefore, firstly, the number of fiber gel sheets placed in the displacement device and the supercritical drying device 10 at one time can be increased, and the production efficiency of the aerogel composite sheet can be improved. Secondly, the horizontal frame assembly can reduce the height of the material frame to avoid the fiber composite gel sheet being squeezed on the fiber composite gel sheet at the bottom of the material box due to the multi-layer superposition and self-weight when the fiber composite gel sheet is placed in multiple layers in the material box, resulting in deformation of the fiber composite gel sheet, and finally resulting in inconsistent thickness of the produced fiber composite gel sheet, reducing the yield rate. Thirdly, the clamping effect of the spacer on the fiber gel sheet is used to ensure that the fiber gel sheet is not easily deformed during the displacement and drying processes, and to ensure the thickness consistency, surface quality and parallelism of the aerogel composite material sheet during the production process, so as to ensure a higher yield rate. Fourthly, the material frame is flipped and stood upright, and the flow channels in the spacer are connected up and down and are roughly distributed along the axial direction of the replacement device or the drying device 10, which is convenient for the replacement liquid or the supercritical fluid to perform rapid solvent exchange and solvent extraction in the replacement device or the drying device 10, and is beneficial to improving the efficiency of solvent replacement of water in the fiber gel sheet in the material frame and the drying efficiency of the carbon dioxide supercritical fluid extraction solvent, thereby realizing stable and efficient replacement treatment and carbon dioxide supercritical drying treatment of the gel fiber sheet, ensuring the continuity of the sheet aerogel composite material in the post-gel process, and ensuring a higher yield.

[0217] Example 1

[0218] An aerogel composite sheet production system includes a substrate supply device, a sol preparation device, a polycondensation material preparation device, a glue coating machine, a gel thickness setting device, an aging device, a slicer, a sheet framing device, a solvent replacement device and a drying device. Along the direction of substrate conveying, the glue coating machine, the gel thickness setting device, the aging device, the slicer, the sheet framing device, the solvent replacement device and the drying device are arranged in sequence. The specific structure of each device is as shown above.

[0219] In order to verify that the aerogel composite sheet production system provided by the present invention can achieve the effect of high thickness consistency of aerogel composite sheets, the aerogel composite sheet production system provided by the embodiment of the present invention was used for production, and multiple groups of experimental verifications were carried out, as shown in Tables 1 to 4 below.

[0220] It can be seen from Tables 1 to 4 that when the aerogel composite sheet production system provided by the present invention is used for production, the thickness difference range of the 2.0 mm glass fiber aerogel composite sheet and the thickness difference range of the 4.0 mm ceramic fiber aerogel composite sheet are within ±0.05, achieving a high consistency in the thickness of the aerogel composite sheet with a thicker substrate.

[0221] Table 1 Thickness test results of 2.0 mm glass fiber aerogel composite sheets obtained after supercritical drying

[0223]

[0224] Table 2 Thermal conductivity test results of 2.0 mm glass fiber aerogel composite sheets obtained after supercritical drying at 25 °C

[0225]

[0226] Table 3 Thickness test results of 4.0 mm ceramic fiber aerogel composite sheet obtained after supercritical drying

[0227]

[0228] Table 4 Thermal conductivity test results of 4.0 mm ceramic fiber aerogel composite sheets obtained after supercritical drying at 25 °C

[0229]

[0230] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0231] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0232] It should also be noted that in the device, apparatus and method of the present invention, each component or each step can be decomposed and / or reassembled, and such decomposition and / or reassembly should be regarded as an equivalent solution of the present invention.

Claims

1. An aerogel composite sheet production system, characterized in that: include: Substrate supply device, sol preparation device, polycondensation material preparation device, glue coating machine, gel thickness setting device, aging device and slicer; The substrate supply device is used to supply continuous substrate to the glue coating machine, and along the direction of the substrate conveying, the glue coating machine, the gel thickness determination device, the aging device and the slicer are arranged in sequence; The glue coating machine comprises a sol pressurizing device, a polycondensation material pressurizing device, a mixing device and a glue coating device, and the glue coating device comprises a glue coating component and a negative pressure mechanism; The discharge port of the sol preparation device is connected to the inlet of the sol pressurizing device, the discharge port of the polycondensation material preparation device is connected to the inlet of the polycondensation material pressurizing device, and the discharge port of the sol pressurizing device and the discharge port of the polycondensation material pressurizing device are respectively connected to the inlet of the mixing device; The discharge port of the mixing device is connected to the glue coating component, the glue coating component is used to combine the mixed material containing the sol and the condensation material with the substrate, and the negative pressure mechanism is used to generate a negative pressure area on the substrate; The gel thickness determination device comprises a double-belt rolling mechanism, and the double-belt rolling mechanism comprises a first rolling mechanism and a second rolling mechanism respectively located on the two side surfaces of the substrate after the dipping.

2. The aerogel composite sheet production system according to claim 1, characterized in that: The glue coating device also includes a glue coating pressurizing mechanism, the discharge port of the mixing device is connected to the feed port of the glue coating pressurizing mechanism, and the discharge port of the glue coating pressurizing mechanism is connected to the glue coating component.

3. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The sol preparation device includes a first stirring tank, a first metering pump, a first weighing component and a first detecting component. The first metering pump is connected to the feed port of the first stirring tank. The first weighing component and the first detecting component are respectively installed on the first stirring tank.

4. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The condensation material preparation device includes a second stirring tank, a second metering pump, a feeding mechanism, a second weighing component, a second detection component and a first ultrasonic vibration mechanism. The second metering pump and the feeding mechanism are respectively connected to the feed port of the second stirring tank, and the second weighing component and the second detection component are respectively installed on the second stirring tank; the first ultrasonic vibration mechanism is arranged in the second stirring tank, and is used to evenly disperse the condensation material and heat the condensation material.

5. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The sol pressurizing device comprises a sol intermediate tank, a first pressurizing pump, a first mixing and heating mechanism and a third detection component; the discharge port of the sol preparation device is connected to the inlet of the sol intermediate tank, and the discharge port of the sol intermediate tank is connected to the first pressurizing pump; the first mixing and heating mechanism and the third detection component are respectively arranged in the sol intermediate tank, and are respectively used to mix, heat and detect the sol; And / or, the condensation material pressurizing device includes a condensation material intermediate tank, a second pressurizing pump, a second mixing and heating mechanism and a fourth detection component; the discharge port of the condensation material preparation device is connected to the inlet of the condensation material intermediate tank, and the discharge port of the condensation material intermediate tank is connected to the second pressurizing pump; the second mixing and heating mechanism and the fourth detection component are respectively arranged in the condensation material intermediate tank, and are respectively used to mix, heat and detect the condensation material.

6. The aerogel composite sheet production system according to claim 5, characterized in that: The first booster pump and the second booster pump each include a plunger diaphragm pump; And / or, the first mixing and heating mechanism and the second mixing and heating mechanism include a second ultrasonic vibration mechanism and a third ultrasonic vibration mechanism respectively; And / or, the sol pressurizing device further comprises a first cleaning mechanism for cleaning the sol pressurizing device and a first online flow meter for online metering of the sol content; And / or, the polycondensation material pressurizing device further comprises a second cleaning mechanism for cleaning the polycondensation material pressurizing device and a second online flow meter for online measuring the polycondensation material content.

7. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The mixing device includes a static mixer and a third cleaning mechanism for cleaning the static mixer.

8. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The glue coating device also includes a glue coating box. The opposite ends of the glue coating box are provided with an inlet and an outlet for the substrate to enter and exit. The negative pressure mechanism and the glue coating component are both located in the glue coating box.

9. The aerogel composite sheet production system according to claim 8, characterized in that: The glue coating device further comprises a fourth ultrasonic vibration mechanism, which is arranged in the glue coating box and below the substrate after being dipped in glue; And / or, the glue coating device further comprises a first nitrogen sealing mechanism and a second nitrogen sealing mechanism, wherein the first nitrogen sealing mechanism and the second nitrogen sealing mechanism are respectively located at the inlet side and the outlet side of the glue coating box; And / or, the glue coating device also includes a fourth cleaning mechanism.

10. The aerogel composite sheet production system according to claim 2, characterized in that: The glue coating pressurizing mechanism comprises a plunger diaphragm pump; And / or, the glue coating component includes a porous matrix glue coating head, and the porous matrix glue coating head includes a plurality of groups of tubular glue coating devices; And / or, the negative pressure mechanism includes a negative pressure generator and a negative pressure distribution member connected to the negative pressure generator, and the negative pressure distribution member is arranged on the upper side and / or the lower side of the substrate.

11. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The gel thickness determination device also includes a pre-gel box, and along the direction of conveying the substrate, the glue coating machine, the pre-gel box, the double-belt rolling mechanism, the aging device and the slicer are arranged in sequence; The pre-gel box is provided with an inlet and an outlet at opposite ends for the substrate after the gelling process to enter and exit; The inlet side and the outlet side of the pre-gel box are respectively provided with a third nitrogen sealing mechanism and a fourth nitrogen sealing mechanism.

12. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The gel thickness setting device also includes a gel thickness setting box, wherein opposite ends of the gel thickness setting box are provided with an inlet and an outlet for the substrate after the gel dipping to enter and exit, and the inlet side and the outlet side of the gel thickness setting box are respectively provided with a nitrogen sealing mechanism; The first rolling mechanism and the second rolling mechanism are located in the gel thickness setting box; A fifth detection component is arranged in the gel thickness calibration box.

13. The aerogel composite sheet production system according to claim 12, characterized in that: The first roller pressing mechanism comprises a first active roller, a first passive roller, a first pressing plate and a first roller pressing belt, the first active roller and the first passive roller drive the first roller pressing belt to move, and the first roller pressing belt is connected to the first pressing plate; The second roller pressing mechanism comprises a second active roller, a second passive roller, a second pressing plate and a second roller pressing belt, the second active roller and the second passive roller drive the second roller pressing belt to move, and the second roller pressing belt is connected to the second pressing plate; And / or, the first rolling mechanism and the second rolling mechanism are respectively connected to a height adjustment mechanism.

14. The aerogel composite sheet production system according to claim 1 or 2, characterized in that: The production system further comprises a sheet framing device, wherein the glue coating machine, the gel thickness determination device, the aging device, the slicer and the sheet framing device are sequentially arranged along the conveying direction of the fiber substrate; The sheet material framing device comprises a material box framing machine and a turning machine. The material box in the material box framing machine is used to accommodate alternately placed sliced ​​composite gel sheets and spacers, and the turning machine is used to turn over the material box.

15. The aerogel composite sheet production system according to claim 14, characterized in that: The material box frame assembly machine includes a material box machine and a frame assembly machine, wherein the material box machine includes a material box, a gel sheet transmission mechanism, a spacer transmission mechanism, a grabbing robot and a material box transmission mechanism, the grabbing robot is arranged on one side of the gel sheet transmission mechanism or the spacer transmission mechanism, and is used to grab the spacer and the sliced ​​composite gel sheet and place them alternately in the material box in sequence, and the material box transmission mechanism is arranged on one side of the material box, and is used to transfer the material box containing the alternately placed sliced ​​composite gel sheets and spacers to the frame assembly machine; The frame assembly machine includes a material box stacking mechanism and a material frame combining mechanism. The material box stacking mechanism is located downstream of the material box conveying mechanism, and is used to stack multiple material boxes into stacks to form a material box combination; the material frame combining mechanism is located downstream of the material box stacking mechanism, and is used to load the material box combination into a material frame.

16. The aerogel composite sheet production system according to claim 14, characterized in that: The production system also includes a solvent replacement device and a drying device; Along the conveying direction of the substrate, the glue coating machine, the gel thickness determination device, the aging device, the slicer, the sheet framing device, the solvent replacement device and the drying device are arranged in sequence.

17. The aerogel composite sheet production system according to claim 16, characterized in that: The aging device comprises a microwave aging device, which comprises an aging box, a microwave heating mechanism, a cooling mechanism and a nitrogen sealing mechanism; And / or, the drying device comprises a supercritical drying device.

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