Gel precursor dipping device for freeze drying of fibrofelt composite aerogel

Abstract

The utility model relates to the technical field of composite aerogel, and discloses a fibrofelt composite aerogel freeze-drying gel precursor dipping device, which comprises a tank body, the top of the tank body is fixedly connected with an adjusting mechanism, the adjusting mechanism comprises two motor protection blocks, the interiors of the motor protection blocks are fixedly connected with driving motors, and the driving motors are connected with the tank body. The driving end of the driving motor is fixedly connected with a lead screw, the outer portion of the lead screw is slidably connected with an adjusting plate, and the top of the adjusting plate is fixedly connected with a dipping tank. According to the device, a gel precursor enters the tank body through the feed port, then the rotary push rod connected with the tank body and the top cover through the fixed seat is started to drive the top cover to rotate so as to open the top of the tank body, and then the driving motor fixedly connected in the motor protection block is started to drive the lead screw to rotate, so that the dipping tank is driven to slide; and then the fiber felt is placed in the dipping tank.

Description

Technical Field

[0001] This utility model relates to the field of composite aerogel technology, and in particular to a gel precursor impregnation device for freeze-drying fiber felt composite aerogel. Background Technology

[0002] Fiber-felt composite aerogel is a multifunctional material composed of fiber felt and aerogel materials, possessing excellent thermal insulation, sound insulation, and mechanical strength properties. Before freeze-drying, fiber-felt composite aerogels typically require impregnation. This impregnation helps the fiber felt absorb the aerogel precursor solution, allowing the aerogel to uniformly fill the fiber network structure and form a stable composite material. Impregnation improves the component permeability of the aerogel, ensuring its uniform distribution within the fiber felt, thereby improving its final mechanical and thermal insulation properties. Using an impregnation device can also increase the material's density and structural stability, ensuring that the aerogel does not shrink or collapse due to moisture evaporation during freeze-drying, thus obtaining a higher quality composite aerogel. In summary, the impregnation step ensures a good bond between the fiber felt and the aerogel, improves the performance of the composite material, and facilitates the smooth progress of the freeze-drying process.

[0003] In the freeze-drying process of fiber-felt composite aerogels, the gel precursor impregnation device typically employs an impregnation method to uniformly penetrate the aerogel precursor solution into the fiber felt. Its working principle involves completely immersing the fiber felt in the aerogel precursor solution using the impregnation device. Utilizing the capillary action of the liquid and the soaking time, the aerogel solution ensures sufficient penetration into every part of the fiber felt, filling the interfiber gaps and forming a uniform precursor layer. Typically, the impregnation device is designed to control the solution flow and soaking time to ensure uniform penetration and maximized filling of the aerogel precursor. After impregnation, the fiber felt is removed, excess solution is removed, and it is ready for the subsequent freeze-drying process. This process can significantly improve the mechanical properties, thermal insulation properties, and stability of the composite aerogel.

[0004] In existing technologies, some gel precursor impregnation devices for freeze-drying fiber-felt composite aerogels suffer from a problem: a lack of effective mechanisms to remove air bubbles from the gel precursor. During impregnation, due to the capillary action of liquid penetration into the fiber felt, air bubbles in the gel precursor become trapped in the pores of the fiber felt, leading to air entering the fiber felt's interior. These bubbles affect the uniformity and final mechanical properties of the aerogel, and during freeze-drying, they can cause instability in the aerogel structure, impacting its final thermal insulation, strength, and other properties. Therefore, this paper proposes a gel precursor impregnation device for freeze-drying fiber-felt composite aerogels to address these issues. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a gel precursor impregnation device for freeze-drying fiber felt composite aerogel, aiming to improve the problem in the prior art where some gel precursor impregnation devices for freeze-drying fiber felt composite aerogel lack the ability to remove air bubbles in the gel precursor, allowing air to enter the interior of the fiber felt.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a gel precursor impregnation device for freeze-drying fiber felt composite aerogel, comprising a tank, an adjustment mechanism fixedly connected to the top of the tank, a sealing mechanism rotatably connected to the top of the tank, a feed inlet fixedly connected to the top of the tank, a base fixedly connected to the bottom of the tank, and a discharge outlet fixedly connected to the outside of the tank.

[0007] The adjustment mechanism includes two motor protection blocks. The bottom of the two motor protection blocks is fixedly connected to the top of the tank. A drive motor is fixedly connected inside the motor protection block. A lead screw is fixedly connected to the drive end of the drive motor. An adjustment plate is slidably connected to the outside of the lead screw. An immersion tank is fixedly connected to the top of the adjustment plate.

[0008] As a further description of the above technical solution: the sealing mechanism includes four fixed seats, two of which are fixedly connected to the top of the tank body, a top cover is rotatably connected to the top of the tank body, two of which are fixedly connected to the top of the top cover, a sliding assembly is fixedly connected to the top of the top cover, and a rotating push rod is rotatably connected inside the fixed seats on the top of the tank body and the top of the top cover.

[0009] As a further description of the above technical solution: the sliding component includes a push rod support frame, the push rod support frame is fixedly connected to the top of the top cover, an adjusting push rod is fixedly connected inside the push rod support frame, an adjustable fixing block is fixedly connected to the bottom of the adjusting push rod, and a stirring component is fixedly connected inside the adjustable fixing block;

[0010] As a further description of the above technical solution: the stirring assembly includes a stirring motor, which is fixedly connected inside the adjustable fixing block. The driving end of the stirring motor is connected to two transmission gear shafts. A stirring connecting plate is fixedly connected to the bottom of the driving end of the stirring motor. Two stirring shafts are rotatably connected to the inner two ends of the stirring connecting plate. Multiple stirring blades are fixedly connected to the outside of the stirring shafts. A working gear shaft is fixedly connected to the top of the outside of the stirring shafts. A toothed belt is coupled to the outside of the working gear shaft and the transmission gear shaft.

[0011] As a further description of the above technical solution: the impregnation tank has multiple impregnation holes inside, the impregnation tank has a placement groove inside, and fiber felt is placed inside the placement groove;

[0012] As a further description of the above technical solution: the top of the tank is provided with a through hole, and a sealing ring is fixedly connected inside the through hole, the sealing ring being fitted to the top cover;

[0013] As a further description of the above technical solution: the inner side of the toothed belt is provided with rotating teeth, and the outer side of the working toothed shaft is provided with auxiliary teeth, and the rotating teeth and the auxiliary teeth are coupled and connected to each other;

[0014] As a further description of the above technical solution: a rotating groove is provided in the middle of the fixed base, and the rotating push rod is rotatably connected in the rotating groove.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the gel precursor enters the interior of the tank through the feed port. Then, the rotating push rod connected to the tank and the top cover by the fixed base is activated, which drives the top cover to rotate and open the top of the tank. After that, the drive motor fixedly connected inside the motor protection block is activated, which drives the lead screw to rotate, thereby driving the impregnation tank to slide. Then, the fiber felt is placed inside the impregnation tank. The gel precursor enters the interior of the fiber felt through the filter holes inside the impregnation tank, thereby completing the impregnation process. During this process, the tank, the top cover, and the sealing ring located outside the top cover provide a sealed environment for the interior of the tank, so that the interior of the tank can reach the vacuum standard, thereby improving the impregnation effect.

[0017] 2. In this utility model, the adjustable push rod, which is fixed to the top of the top cover by the push rod support frame, is activated to push the adjustable fixed block to slide, thereby causing the stirring motor located inside the adjustable fixed block to slide. Then the stirring motor is activated, thereby driving the two transmission gear shafts and the stirring connecting plate located at the driving end of the stirring motor. At the same time, the two transmission gears drive the two working gear shafts to rotate through the external toothed belt, so that the stirring shaft and multiple stirring fan blades outside the stirring shaft follow the toothed belt to achieve the function of stirring the fiber felt and gel precursor, thereby improving the impregnation effect and removing air bubbles in the gel precursor, thus improving the practicality of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the gel precursor impregnation device for freeze-drying fiber felt composite aerogel proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the impregnation tank of the gel precursor impregnation device for freeze-drying fiber felt composite aerogel proposed in this utility model.

[0020] Figure 3This is a schematic diagram of the sealing ring of the gel precursor impregnation device for freeze-drying fiber felt composite aerogel proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the stirring motor of the gel precursor impregnation device for freeze-drying fiber felt composite aerogel proposed in this utility model.

[0022] Legend:

[0023] 1. Tank body; 2. Base; 3. Inlet; 4. Outlet; 5. Top cover; 6. Fixed seat; 7. Rotating push rod; 8. Adjusting push rod; 9. Push rod support frame; 10. Motor protective block; 11. Drive motor; 12. Lead screw; 13. Sealing ring; 14. Impregnation tank; 15. Adjusting plate; 16. Adjustable fixing block; 17. Agitator motor; 18. Transmission gear; 19. Agitator connecting plate; 20. Working gear shaft; 21. Toothed belt; 22. Agitator shaft; 23. Agitator blade. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 2 This utility model provides an embodiment of a gel precursor impregnation device for freeze-drying fiber felt composite aerogel, including a tank 1. The tank 1 is the core container of the entire impregnation device and has sufficient strength to withstand internal gas, solution and external pressure. An adjustment mechanism is fixedly connected to the top of the tank 1, and a sealing mechanism is rotatably connected to the top of the tank 1. An inlet 3 is fixedly connected to the top of the tank 1. The inlet 3 is used to add aerogel precursor solution into the tank 1 to ensure that the solution can be evenly distributed on the fiber felt through the impregnation device. A base 2 is fixedly connected to the bottom of the tank 1. The base 2 is located at the bottom of the tank 1 and provides stable support for the device. An outlet 4 is fixedly connected to the outside of the tank 1. The outlet 4 is responsible for discharging excess aerogel solution to prevent excessive accumulation of solution and affecting the impregnation effect of the fiber felt.

[0026] The adjustment mechanism includes two motor protection blocks 10, which are designed to protect the motor components from the influence of the external environment and ensure the long-term stable operation of the drive motor 11. The bottom of the two motor protection blocks 10 is fixedly connected to the top of the tank 1. The drive motor 11 is fixedly connected inside the motor protection blocks 10. The function of the drive motor 11 is to provide power to drive the lead screw 12 to rotate. The drive end of the drive motor 11 is fixedly connected to the lead screw 12. Through the rotation of the lead screw 12, the adjustment plate 15 can slide up and down along the lead screw 12 to realize the height adjustment of the impregnation tank 14. The adjustment plate 15 is slidably connected to the outside of the lead screw 12. The top of the adjustment plate 15 is fixedly connected to the impregnation tank 14. The impregnation tank 14 has multiple impregnation holes inside to improve the liquid's permeability and ensure that the aerogel solution permeates evenly into the fiber felt. The impregnation tank 14 has multiple impregnation holes inside and a placement groove inside, where the fiber felt is placed.

[0027] Reference Figure 1 , Figure 3 , Figure 4 The sealing mechanism includes four fixed seats 6, which are fixedly connected to the top of the tank body 1 to support the top cover 5. The seal between the top cover 5 and the tank body 1 is achieved by a sealing ring 13. The contact between the sealing ring 13 and the top cover 5 effectively prevents solution leakage. Two fixed seats 6 are fixedly connected to the top of the tank body 1, and the top cover 5 is rotatably connected to the top of the tank body 1. The seal between the top cover 5 and the tank body 1 is achieved by a sealing ring 13. The contact between the sealing ring 13 and the top cover 5 effectively prevents solution leakage. Two fixed seats 6 are fixedly connected to the top of the top cover 5, and a sliding mechanism is fixedly connected to the top of the top cover 5. The component, the fixed seat 6 at the top of the tank body 1 and the top cover 5, is rotatably connected to a rotating push rod 7. The rotating push rod 7 is installed in a rotating groove, which can precisely adjust the sealing of the top cover 5 by rotating the push rod. When the sealing mechanism is completely closed, it can ensure that the gas or solution in the tank body 1 will not leak. The top of the tank body 1 is provided with a through hole, and a sealing ring 13 is fixedly connected inside the through hole. The contact between the sealing ring 13 and the top cover 5 can effectively prevent solution leakage. The sealing ring 13 fits against the top cover 5. A rotating groove is provided in the middle of the fixed seat 6, and the rotating push rod 7 is rotatably connected in the rotating groove.

[0028] The sliding assembly includes a push rod support frame 9, which is fixedly connected to the top of the top cover 5. An adjusting push rod 8 is connected to the push rod support frame 9, which is also fixedly connected to the top of the top cover 5. An adjusting push rod 8 is fixedly connected inside the push rod support frame 9. By adjusting the position of the adjusting push rod 8, the adjustable fixing block 16 can be precisely adjusted, thereby adjusting the working state of the stirring assembly. The bottom of the adjusting push rod 8 is fixedly connected to the adjustable fixing block 16. The design of the adjustable fixing block 16 ensures the flexibility and stability of the stirring assembly under different operating environments. The stirring assembly is fixedly connected inside the adjustable fixing block 16.

[0029] The stirring assembly includes a stirring motor 17, which provides power for stirring. The power is transmitted to a stirring connecting plate 19 via two geared shafts 18, driving the stirring shaft 22 to rotate. The stirring motor 17 is fixedly connected inside an adjustable fixing block 16. The drive end of the stirring motor 17 is connected to the two geared shafts 18. The bottom of the drive end of the stirring motor 17 is fixedly connected to the stirring connecting plate 19. Two stirring shafts 22 are rotatably connected to both ends inside the stirring connecting plate 19. Multiple stirring blades 23 are fixedly connected to the outside of the stirring shafts 22 for mixing and stirring the liquid. To ensure the uniformity of the aerogel solution, multiple stirring blades 23 are fixedly connected to the outside of the stirring shaft 22. A working gear shaft 20 is fixedly connected to the top of the outside of the stirring shaft 22. The working gear shaft 20 is connected to the outside of the transmission gear 18 through a toothed belt 21. The toothed belt 21 is coupled with the auxiliary teeth on the outside through the inner rotating teeth to achieve precise transmission and stable stirring effect. The working gear shaft 20 is coupled to the outside of the transmission gear 18 through the toothed belt 21. The inner side of the toothed belt 21 is provided with rotating teeth, and the outside of the working gear shaft 20 is provided with auxiliary teeth. The rotating teeth and the auxiliary teeth are coupled to each other.

[0030] Working principle: The gel precursor enters the interior of the tank 1 through the inlet 3. Then, the rotating push rod 7, which is connected to the tank 1 and the top cover 5, is activated by the fixed seat 6, thereby pushing the top cover 5 to rotate and opening the through hole at the top of the tank 1. Then, the two drive motors 11, which are fixedly connected to the top of the tank 1 by the motor protection block 10, are activated. The drive motors 11 drive the lead screw 12 to rotate, thereby driving the impregnation tank 14 and the adjusting plate 15 to slide. Then, the fiber felt is placed inside the adjusting plate 15. Then, the drive motors 11 drive the lead screw 12 to rotate, so that the impregnation tank 14 sinks into the gel precursor. Then, the push rod 7 is activated to loosen the top cover 5, so that the top cover 5 fits with the through hole at the top of the tank 1. Then, the top cover 5 and the tank 1 are sealed with the help of the sealing ring 13. Then, the outlet 4 is closed. The interior of the tank 1 is evacuated to a vacuum environment through the inlet 3 to improve the impregnation effect.

[0031] Furthermore, while achieving the impregnation effect, the adjusting push rod 8, which is fixed to the top of the top cover 5 via the push rod support frame 9, is activated, thereby pushing the adjustable fixing block 16 to slide. The stirring motor 17, which is fixedly connected inside the adjustable fixing block 16, is activated, thereby driving the two transmission gear shafts 18 and the stirring connecting plate 19 located at the driving end of the stirring motor 17 to rotate. At the same time, the two transmission gears 18 are connected to the two working gear shafts 20 via two toothed belts 21 located outside the transmission gears 18, which also drive the working gear shafts 20 to rotate. The rotation of the working gear shafts 20 also drives the stirring shaft 22 and the stirring fan blades 23 to rotate, thereby achieving the stirring function, thereby expelling the air in the gel precursor and improving the impregnation effect.

[0032] After impregnation is completed, the gel precursor is discharged from the inside of the tank 1 through the discharge port 4. Then, the two drive motors 11 are started, thereby driving the two lead screws 12 to rotate, thereby driving the impregnation tank 14, so as to remove the fiber felt after impregnation.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gel precursor impregnation apparatus for freeze-drying fiber felt composite aerogel, comprising a tank (1), characterized in that: An adjustment mechanism is fixedly connected to the top of the tank (1), a sealing mechanism is rotatably connected to the top of the tank (1), a feed inlet (3) is fixedly connected to the top of the tank (1), a base (2) is fixedly connected to the bottom of the tank (1), and a discharge outlet (4) is fixedly connected to the outside of the tank (1). The adjustment mechanism includes two motor protection blocks (10), the bottom of the two motor protection blocks (10) is fixedly connected to the top of the tank body (1), a drive motor (11) is fixedly connected inside the motor protection block (10), a lead screw (12) is fixedly connected to the drive end of the drive motor (11), an adjustment plate (15) is slidably connected to the outside of the lead screw (12), and an immersion tank (14) is fixedly connected to the top of the adjustment plate (15).

2. The apparatus for impregnating the gel precursor for freeze-drying fiber felt composite aerogel according to claim 1, characterized in that: The sealing mechanism includes four fixed seats (6), two of which are fixedly connected to the top of the tank (1). A top cover (5) is rotatably connected to the top of the tank (1). Two of the fixed seats (6) are fixedly connected to the top of the top cover (5). A sliding component is fixedly connected to the top of the top cover (5). A rotating push rod (7) is rotatably connected inside the fixed seats (6) on the top of the tank (1) and the top cover (5).

3. The gel precursor impregnation apparatus for freeze-drying fiber felt composite aerogel according to claim 2, characterized in that: The sliding assembly includes a push rod support frame (9), which is fixedly connected to the top of the top cover (5). An adjusting push rod (8) is fixedly connected inside the push rod support frame (9). An adjustable fixing block (16) is fixedly connected to the bottom of the adjusting push rod (8). A stirring assembly is fixedly connected inside the adjustable fixing block (16).

4. The gel precursor impregnation apparatus for freeze-drying fiber felt composite aerogel according to claim 3, characterized in that: The stirring assembly includes a stirring motor (17), which is fixedly connected inside the adjustable fixing block (16). The driving end of the stirring motor (17) is connected to two transmission gear shafts (18). The bottom of the driving end of the stirring motor (17) is fixedly connected to a stirring connecting plate (19). The two ends of the stirring connecting plate (19) are rotatably connected to two stirring shafts (22). Multiple stirring blades (23) are fixedly connected to the outside of the stirring shafts (22). A working gear shaft (20) is fixedly connected to the top of the outside of the stirring shafts (22). A toothed belt (21) is coupled to the outside of the working gear shaft (20) and the transmission gear shaft (18).

5. The apparatus for impregnating the gel precursor for freeze-drying fiber felt composite aerogel according to claim 1, characterized in that: The impregnation tank (14) has multiple impregnation holes inside, and a placement groove is provided inside the impregnation tank (14), in which fiber felt is placed.

6. The apparatus for impregnating the gel precursor of fiber felt composite aerogel freeze-drying according to claim 2, characterized in that: The top of the tank (1) has a through hole, and a sealing ring (13) is fixedly connected inside the through hole. The sealing ring (13) fits against the top cover (5).

7. The apparatus for impregnating the gel precursor of fiber felt composite aerogel freeze-drying according to claim 4, characterized in that: The inner side of the toothed belt (21) is provided with rotating teeth, and the outer side of the working toothed shaft (20) is provided with auxiliary teeth. The rotating teeth and the auxiliary teeth are coupled to each other.

8. The apparatus for impregnating the gel precursor for freeze-drying fiber felt composite aerogel according to claim 2, characterized in that: The fixed base (6) has a rotating groove in the middle, and the rotating push rod (7) is rotatably connected in the rotating groove.

Images