A silica aerogel powder particle size screening device

Abstract

The invention discloses a silica aerogel powder particle size screening device, which relates to the field of screening technology and comprises a screener, wherein one side of the screener is fixedly connected with an inlet pipe, the bottom of the screener is fixedly connected with a discharge barrel, and a screening mechanism is arranged inside the screener. By arranging the screening mechanism, small particles can be fully and smoothly screened, and when a paddle plate rotates to paddle the particles, the particles will move to the outer circle on the filter plate due to the centrifugal effect of the paddle plate rotating, and the particles above will be supplemented, so as to realize the up and down cyclic automatic layer turning effect of the particles, thereby further ensuring that each particle can be screened by the filter plate, thereby ensuring the accuracy and stability of the screening.

Description

Technical Field

[0001] The invention relates to the technical field of screening, in particular to a device for screening the particle size of aerogel powder of silicon dioxide. Background Art

[0002] Silica aerogel powder is mainly composed of nano-scale silica particles, with extremely high specific surface area and porosity. Its specific surface area can reach hundreds or even thousands of square meters per gram, and its porosity is as high as more than 90%;

[0003] A silica aerogel powder particle size screening device in a patent application with announcement number CN118371425A comprises a bottom plate; a group of guide rods are fixedly connected to the top of the bottom plate; a screening barrel is arranged on the top of the guide rods; a group of guide sleeves are fixedly connected to the bottom of the screening barrel; a group of guide sleeves are respectively slidably connected to a group of guide rods; a screen is fixedly connected to the inner circular wall of the screening barrel; an annular block is rotatably connected to the screening barrel through a group of first fixed rods; a first rotating rod is rotatably connected in the annular block; a sieve hole processing member is arranged on the first rotating rod;

[0004] During the processing of silica aerogel particles, the particles need to be screened. During the screening process, due to the different storage and transportation environments of the particles, there will be a certain amount of moisture and attachments on the surface of the particles, which will lead to greater friction between the particles during the screening process, resulting in the problem of mutual jamming and difficulty in passing through the filter holes to complete the feeding. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a silica aerogel powder particle size screening device, which achieves the purpose of solving the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a silica aerogel powder particle size screening device, comprising a screener, one side of the screener is fixedly connected to an inlet pipe, the bottom of the screener is fixedly connected to a feed barrel, and a screening mechanism is arranged inside the screener;

[0007] The screening mechanism includes:

[0008] The connecting rod is a round rod-shaped structure. One end of the connecting rod is fixedly connected to the inner wall of the screener. The other end of the connecting rod is fixedly connected to the motor. The output end of the motor is fixedly connected to the rotating rod. The outer wall of the rotating rod is rotatably connected to the filter plate through the bearing. The outer wall of the filter plate is fixedly connected to the inner wall of the screener. The connecting rod is used to fix the position of the motor.

[0009] The paddle plate is a long strip structure, one end of the paddle plate is fixedly connected to the outer wall of the rotating rod, the bottom of the paddle plate is slidably connected to the top of the filter plate, and the paddle plate is used to be driven by the rotating rod to rotate synchronously.

[0010] Preferably, the motor is used to control the rotation of the rotating rod and the dial plate, the inner wall of the screener is connected to the inner wall of the inlet pipe, and the inner wall of the screener is connected to the inner wall of the discharge barrel.

[0011] Preferably, an air inlet pipe is fixedly connected to one side of the sifter, an air outlet pipe is fixedly connected to the top of the sifter, and a ventilation pipe is rotatably connected to the bottom of the rotating rod through a bearing. The ventilation pipe is an L-shaped tubular structure, one end of the ventilation pipe is fixedly connected to one end of the air inlet pipe, and the air outlet pipe is used to let the air inside the sifter to go out.

[0012] Preferably, the interior of the air inlet pipe is connected to the interior of the ventilation pipe, the interior of the ventilation pipe is connected to the interior of the rotating rod, the interior of the rotating rod is connected to the interior of the paddle plate, air holes are provided on the inner and outer walls of the paddle plate, the inner wall of the paddle plate is connected to the interior of the air holes, and the air inlet pipe is used to inject air into the ventilation pipe and discharge it outward through the air holes.

[0013] Preferably, a vibration mechanism is provided on the outer wall of the paddle plate, and the vibration mechanism includes a first hinge block and a first hinge block, the outer wall of the rotating rod is hinged with a hinge rod through the first hinge block and the first hinge block, the outer wall of the hinge rod is slidably connected with a slide groove, the inner wall of the slide groove is slidably connected with another hinge rod, the bottom end of the other hinge rod is hinged with a slider through the second hinge block, the inner wall of the slider is slidably connected to the outer wall of the paddle plate, and separation plates are fixedly connected on both sides of the slide groove, and the separation plates are used to push and separate the particles.

[0014] Preferably, a sliding block is fixedly connected to the inner wall of the slider, a sliding groove is provided on one side of the shift plate, one end of the sliding block is slidably connected to the inner wall of the sliding groove, the slider is slidably connected to the shift plate through the sliding block and the sliding groove, and a built-in spring is provided on the inner wall of the sliding groove, and both ends of the built-in spring are respectively fixedly connected to one end of the upper and lower hinged rods.

[0015] Preferably, a toggle mechanism is provided on the outer wall of the slider, which includes a rotating shaft. The outer wall of the slider is rotatably connected to the rotating shaft. Connecting sleeves are rotatably connected at both ends of the rotating shaft. The outer wall of the connecting sleeve is fixedly connected to the outer wall of the slider. The outer wall of the rotating shaft is fixedly connected to a connecting plate. An opening and closing plate is fixedly connected to one side of the connecting plate.

[0016] Preferably, a groove is provided on the inner wall of the opening and closing plate, and a built-in torsion spring is provided on the inner wall of the connecting sleeve. The two ends of the built-in torsion spring are respectively fixedly connected to the inner wall of the connecting sleeve and one end of the rotating shaft, and the built-in torsion spring is used to reset the rotating shaft.

[0017] The present invention provides a device for screening the particle size of aerogel powder of silicon dioxide. It has the following beneficial effects:

[0018] 1. The present invention provides a screening mechanism so that small particles can be fully and smoothly screened. When the paddle plate rotates to paddle the particles, the particles will move to the outer circle on the filter plate due to the centrifugal effect of the paddle plate's rotation, and the particles above will be replenished to achieve an up and down cyclic automatic layer turning effect of the particles, thereby further ensuring that each particle can be screened by the filter plate, thereby ensuring the accuracy and stability of the screening.

[0019] 2. The present invention sets a screening mechanism, and the liquid enters the paddle plate through the connection between the rotating rod and the paddle plate, and is discharged outward through the air holes opened on the outer wall of the paddle plate, so that while the paddle plate stirs the particles for screening, the real-time air jet from the outer wall of the paddle plate is used to further promote the dispersion of the particles, thereby reducing the friction and jamming between the particles. At the same time, this method can also dry the moisture on the surface of the particles to reduce the problem of mutual adhesion.

[0020] 3. The present invention sets a screening mechanism and utilizes the effect of real-time jet to blow away the dust and residue existing in the particles for a long time. The air is continuously injected into the screener and discharged outward through the air outlet pipe at the top. Then, the air in the screener will rise as a whole, and the air carrying the residue on the surface of the particles will also discharge the residue and moisture through the air outlet pipe. While completing the screening of the particles, the cleanliness of the particles themselves is ensured, and the problem of particles that can originally pass through the filter plate but cannot pass through due to various adhesions is reduced.

[0021] 4. The present invention provides a vibration mechanism so that the two hinged rods and the slide groove can slide and extend, thereby ensuring space for the slider to slide outward on the outer wall of the paddle plate, and utilizing the sliding of the slider on the outer wall of the paddle plate to scrape the outer wall of the paddle plate, thereby preventing some particles from adhering to the outer wall of the paddle plate due to stickiness and moisture and being unable to fall and be screened.

[0022] 5. The present invention sets a vibration mechanism, and the slide groove is in a broken line shape. Therefore, when the slider slides on the outer wall of the paddle plate, it will move up and down and slide on the outer wall of the paddle plate, and at the same time drive the hinged rod hinged to the slider and the slide groove to vibrate back and forth, and use the hinged rod and the slide groove to realize the vibration-type rotation and paddle action in the particles, effectively shaking off the particles attached to the particles through vibration, and reducing the situation where the adhesion affects the screening and unloading;

[0023] 6. The present invention sets a toggle mechanism, and the opening and closing plate and the connecting plate will continuously rise and swing with inertia. At the same time, the built-in torsion spring on the inner wall of the connecting sleeve will limit the rotating shaft to reset it, so that when the slider continuously rises and falls, the opening and closing plate and the connecting plate continuously rise and swing to toggle the particles up and down to disperse them, and separate the particles through the grooves, thereby reducing the problem of particle adhesion;

[0024] 7. The present invention sets a toggle mechanism, and when the slider rotates to the end of the toggle plate, the slider on the toggle plate will no longer be subjected to the outward centrifugal force when the motor gradually stops and starts to reverse, and the built-in spring inside the slide groove will pull the hinge rod and the slider back to their original positions, so that when the motor controls the rotating rod and the toggle plate to reverse again, the same reciprocating work will be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 3 The structure diagram of the screening mechanism of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 4 The structure diagram of the screening mechanism of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 5 The motion state of the screening mechanism of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 6 For the present invention Figure 5 A magnified image of point A;

[0031] Figure 7 For the present invention Figure 5 A magnified view of point B;

[0032] Figure 8 It is a structural schematic diagram of the vibration mechanism of the present invention;

[0033] Fig. 9 The motion state of the screening mechanism of the present invention is shown in FIG. Figure 2 ;

[0034] Fig.10 The structure diagram of the vibration mechanism of the present invention is shown in FIG. Figure 1 ;

[0035] Fig.11 The structure diagram of the vibration mechanism of the present invention is shown in FIG. Figure 2 ;

[0036] Fig.12 The structure of the toggle mechanism of the present invention is shown in FIG. Figure 1 ;

[0037] Fig.13 The structure of the toggle mechanism of the present invention is shown in FIG. Figure 2 ;

[0038] Fig.14 The structure of the toggle mechanism of the present invention is shown in FIG. Figure 3 .

[0039] In the figure: 1 inlet pipe, 2 screening mechanism, 201 connecting rod, 202 motor, 203 rotating rod, 204 filter plate, 205 ventilation pipe, 206 air inlet pipe, 207 dial plate, 208 air hole, 209 outlet pipe, 3 vibration mechanism, 301 first hinge block, 302 hinge rod, 303 second hinge block, 304 slider, 305 sliding round block, 306 slide groove, 307 separation plate, 4 toggle mechanism, 401 rotating shaft, 402 connecting sleeve, 403 connecting plate, 404 opening and closing plate, 405 groove, 5 screener, 6 unloading barrel. DETAILED DESCRIPTION

[0040] Example 1: Please refer to Figure 1-4 The present invention provides a technical solution: a silica aerogel powder particle size screening device, comprising a screener 5, one side of the screener 5 is fixedly connected to an inlet pipe 1, the bottom of the screener 5 is fixedly connected to a feed barrel 6, and a screening mechanism 2 is arranged inside the screener 5;

[0041] The screening mechanism 2 comprises:

[0042] Connecting rod 201, connecting rod 201 is a round rod-shaped structure, one end of connecting rod 201 is fixedly connected to the inner wall of sifter 5, the other end of connecting rod 201 is fixedly connected to motor 202, the output end of motor 202 is fixedly connected to rotating rod 203, the outer wall of rotating rod 203 is rotatably connected to filter plate 204 through bearing, the outer wall of filter plate 204 is fixedly connected to the inner wall of sifter 5, connecting rod 201 is used to fix the position of motor 202;

[0043] The paddle plate 207 is a long strip structure, one end of the paddle plate 207 is fixedly connected to the outer wall of the rotating rod 203, the bottom of the paddle plate 207 is slidably connected to the top of the filter plate 204, and the paddle plate 207 is used to be driven by the rotating rod 203 to play a role of synchronous rotation.

[0044] The motor 202 is used to control the rotation of the rotating rod 203 and the dial plate 207. The inner wall of the screener 5 is connected to the inner wall of the inlet pipe 1, and the inner wall of the screener 5 is connected to the inner wall of the discharge barrel 6.

[0045] An air inlet pipe 206 is fixedly connected to one side of the sifter 5, an air outlet pipe 209 is fixedly connected to the top of the sifter 5, and a ventilation pipe 205 is rotatably connected to the bottom of the rotating rod 203 through a bearing. The ventilation pipe 205 is an L-shaped tubular structure, and one end of the ventilation pipe 205 is fixedly connected to one end of the air inlet pipe 206, and the air outlet pipe 209 is used to let the air inside the sifter 5 to the outside.

[0046] The inside of the air inlet pipe 206 is connected to the inside of the vent pipe 205, the inside of the vent pipe 205 is connected to the inside of the rotating rod 203, the inside of the rotating rod 203 is connected to the inside of the dial plate 207, the inner and outer walls of the dial plate 207 are provided with air holes 208, the inner wall of the dial plate 207 is connected to the inside of the air holes 208, and the air inlet pipe 206 is used to inject air into the vent pipe 205 and discharge it outward through the air holes 208;

[0047] When in use, the silica aerogel powder particles to be put in are connected with the inlet pipe 1, and then put into the sifter 5, and are placed on the filter plate 204, and are received by the filter plate 204, and then the particles of different sizes are screened and dropped through the filter holes in the filter plate 204, and the screened particles are discharged through the discharge barrel 6, thereby completing the screening of the particles;

[0048] When the particles enter the filter plate 204, the motor 202 is started to control the rotation of the rotating rod 203. When the rotating rod 203 rotates, the outer wall of the dial plate 207 is driven to start rotating. The rotation of the dial plate 207 can disperse the particles that are blocked in the filter plate 204 and cannot fall due to squeezing, so that small particles can fully and smoothly enter the drop opening of the filter plate 204. When the dial plate 207 rotates to move the particles, the particles will move to the outer circle on the filter plate 204 due to the centrifugal effect of the dial plate 207. At this time, the particles in the inner circle will be supplemented by the particles above, realizing the up and down circulation automatic layer turning effect of the particles, thereby further ensuring that each particle can be screened by the filter plate 204, thereby ensuring the accuracy and stability of the screening.

[0049] When the screening work is in progress, the air inlet pipe 206 outside the sifter 5 is connected to the ventilation pipe, and the air is pressurized and injected into the air inlet pipe 206 through the external air pump. The air entering the sifter 5 through the air inlet pipe 206 is connected with the ventilation pipe 205 in the sifter 5, and enters the rotating rod 203 through the ventilation pipe 205, and enters the dial plate 207 through the connection between the rotating rod 203 and the dial plate 207, and is discharged outward through the air holes 208 opened on the outer wall of the dial plate 207, so that when the dial plate 207 stirs the particles for screening, the outer wall of the dial plate 207 is also used to further promote the dispersion of the particles, reduce the friction between the particles, and at the same time, this method can dry the moisture attached to the surface of the particles to reduce the problem of mutual adhesion.

[0050] The dust and residue existing in the particles are blown away by the real-time jet, and the air is continuously injected into the sifter 5 and discharged outward through the air outlet pipe 209 at the top. Then, the air in the sifter 5 will rise as a whole, and the air carrying the residue on the surface of the particles will also discharge the residue and moisture through the air outlet pipe 209, completing the particle screening while ensuring the cleanliness of the particles themselves, and reducing the problem that the particles that could originally pass through the filter plate 204 cannot pass due to various adhesions;

[0051] The motor 202 controls the rotating rod 203 to rotate back and forth. After a period of forward rotation, the rod 203 gradually slows down and stops, and then starts to reverse. The stability of the screening material is ensured by different toggling states.

[0052] Example 2: Please refer to Figure 1-11 On the basis of the first embodiment, the present invention provides a technical solution: a vibration mechanism 3 is arranged on the outer wall of the dial plate 207, and the vibration mechanism 3 includes a first hinge block and a first hinge block 301. The outer wall of the rotating rod 203 is hinged with a hinge rod 302 through the first hinge block and the first hinge block 301. The outer wall of the hinge rod 302 is slidably connected with a slide groove 306. The inner wall of the slide groove 306 is slidably connected with another hinge rod 302. The bottom end of the other hinge rod 302 is hinged with a slider 304 through the second hinge block 303. The inner wall of the slider 304 is slidably connected with the outer wall of the dial plate 207. Separation plates 307 are fixedly connected on both sides of the slide groove 306. The separation plates 307 are used to push and separate the particles.

[0053] A sliding block 305 is fixedly connected to the inner wall of the slider 304, a sliding groove 306 is provided on one side of the dial plate 207, one end of the sliding block 305 is slidably connected to the inner wall of the sliding groove 306, the slider 304 is slidably connected to the dial plate 207 through the sliding block 305 and the sliding groove 306, and an internal spring is provided on the inner wall of the sliding groove 306, and the two ends of the internal spring are respectively fixedly connected to one end of the upper and lower hinge rods 302;

[0054] When the motor 202 controls the paddle plate 207 to rotate through the rotating rod 203, the slider 304, the hinge rod 302 and the slide groove 306 connected to the outer wall of the paddle plate 207 will be thrown outward from the outer wall of the paddle plate 207 due to the centrifugal effect. When the slider 304 is located on the outer wall of the paddle plate 207 and slides outward, it will pull the two different hinge rods 302 on the upper and lower inner walls of the slide groove 306 to slide on the inner wall of the slide groove 306, so that the two hinge rods 302 and the slide groove 306 slide and extend, ensuring space for the slider 304 to slide outward on the outer wall of the paddle plate 207, and using the sliding of the slider 304 on the outer wall of the paddle plate 207 to complete the scraping of the outer wall of the paddle plate 207, so as to prevent some particles from adhering to the outer wall of the paddle plate 207 due to stickiness and moisture and being unable to fall down for screening;

[0055] When the slider 304 slides on the outer wall of the dial plate 207, the slider 304 will slide on the inner wall of the slide groove 306 of the outer wall of the dial plate 207 through the sliding round block 305 on the inner wall of the slider 304. The slide groove 306 is in a broken line shape, so when the slider 304 slides on the outer wall of the dial plate 207, it will move up and down and slide on the outer wall of the dial plate 207, and at the same time drive the hinged rod 302 and the slide groove 306 hinged to the slider 304 to vibrate back and forth, and use the hinged rod 302 and the slide groove 306 to realize a vibrating rotational toggling action in the particles, effectively shaking off the particles attached to the particles through vibration, and reducing the situation where the adhesion affects the screening and unloading;

[0056] Example 3: Please refer to Figure 1-14 On the basis of the first and second embodiments, the present invention provides a technical solution: a toggle mechanism 4 is provided on the outer wall of the slider 304, the toggle mechanism 4 includes a rotating shaft 401, the outer wall of the slider 304 is rotatably connected to the rotating shaft 401, both ends of the rotating shaft 401 are rotatably connected to connecting sleeves 402, the outer wall of the connecting sleeve 402 is fixedly connected to the outer wall of the slider 304, the outer wall of the rotating shaft 401 is fixedly connected to a connecting plate 403, and one side of the connecting plate 403 is fixedly connected to an opening and closing plate 404.

[0057] A groove 405 is provided on the inner wall of the opening and closing plate 404, and a built-in torsion spring is provided on the inner wall of the connecting sleeve 402. The two ends of the built-in torsion spring are respectively fixedly connected to the inner wall of the connecting sleeve 402 and one end of the rotating shaft 401. The built-in torsion spring is used to reset the rotating shaft 401.

[0058] During the up-and-down vibration of the slider 304, the opening and closing plate 404 and the connecting plate 403 are driven to move upward through the rotating shaft 401, and the opening and closing plate 404 and the connecting plate 403 are continuously swung upward due to inertia, and the built-in torsion spring on the inner wall of the connecting sleeve 402 restricts the rotating shaft 401 to reset it, so that when the slider 304 is continuously rising and falling, the opening and closing plate 404 and the connecting plate 403 are continuously swung upward to disperse the particles, and the particles are separated through the groove 405, thereby reducing the problem of particle adhesion;

[0059] When the slider 304 rotates to the end of the paddle 207, the slider 304 on the paddle 207 is no longer subjected to the outward centrifugal force when the motor 202 gradually stops and starts to reverse, and the built-in spring inside the slide slot 306 pulls the hinge rod 302 and the slider 304 back to their original positions, so that when the motor 202 controls the rotating rod 203 and the paddle 207 to reverse again, the same reciprocating work is performed;

[0060] The gas discharged through the air hole 208 is not sufficient to blow away the particle, and can only blow away the smaller irrelevant particles and dust attached to the particle through the air outlet pipe 209.

[0061] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A silica aerogel powder particle size screening device, comprising a screener (5), one side of the screener (5) is fixedly connected to an inlet pipe (1), and the bottom of the screener (5) is fixedly connected to a lower barrel (6), characterized in that: The sifter (5) is provided with a sifting mechanism (2) inside; The screening mechanism (2) comprises: A connecting rod (201), wherein the connecting rod (201) is a circular rod-shaped structure, one end of the connecting rod (201) is fixedly connected to the inner wall of the sifter (5), the other end of the connecting rod (201) is fixedly connected to a motor (202), the output end of the motor (202) is fixedly connected to a rotating rod (203), the outer wall of the rotating rod (203) is rotatably connected to a filter plate (204) via a bearing, the outer wall of the filter plate (204) is fixedly connected to the inner wall of the sifter (5), and the connecting rod (201) is used to fix the position of the motor (202); A paddle plate (207), the paddle plate (207) being a long strip structure, one end of the paddle plate (207) being fixedly connected to the outer wall of the rotating rod (203), the bottom of the paddle plate (207) being slidably connected to the top of the filter plate (204), and the paddle plate (207) being driven by the rotating rod (203) to rotate synchronously; The motor (202) is used to control the rotation of the rotating rod (203) and the dial plate (207); the inner wall of the screener (5) is connected to the inner wall of the inlet pipe (1); and the inner wall of the screener (5) is connected to the inner wall of the discharge barrel (6); An air inlet pipe (206) is fixedly connected to one side of the sifter (5), and an air outlet pipe (209) is fixedly connected to the top of the sifter (5). The bottom of the rotating rod (203) is rotatably connected to a ventilation pipe (205) via a bearing. The ventilation pipe (205) is an L-shaped tubular structure. One end of the ventilation pipe (205) is fixedly connected to one end of the air inlet pipe (206), and the air outlet pipe (209) is used to allow air inside the sifter (5) to be discharged to the outside.

2. The silica aerogel powder particle size screening device according to claim 1, characterized in that: The interior of the air inlet pipe (206) is connected to the interior of the ventilation pipe (205), the interior of the ventilation pipe (205) is connected to the interior of the rotating rod (203), the interior of the rotating rod (203) is connected to the interior of the shifting plate (207), the inner and outer walls of the shifting plate (207) are provided with air holes (208), the inner wall of the shifting plate (207) is connected to the interior of the air holes (208), and the air inlet pipe (206) is used to inject air into the ventilation pipe (205) and discharge it outward through the air holes (208).

3. A silica aerogel powder particle size screening device according to claim 2, characterized in that: The outer wall of the paddle plate (207) is provided with a vibration mechanism (3), the vibration mechanism (3) comprising a first hinge block (301), the outer wall of the rotating rod (203) is hinged with a hinge rod (302) via the first hinge block (301), the outer wall of the hinge rod (302) is slidably connected with a slide groove (306), the inner wall of the slide groove (306) is slidably connected with another hinge rod (302), the bottom end of the other hinge rod (302) is hinged with a slider (304) via a second hinge block (303), the inner wall of the slider (304) is slidably connected with the outer wall of the paddle plate (207), separation plates (307) are fixedly connected to both sides of the slide groove (306), and the separation plates (307) are used to push and separate the particles.

4. A silica aerogel powder particle size screening device according to claim 3, characterized in that: A sliding block (305) is fixedly connected to the inner wall of the slider (304); a sliding groove (306) is provided on one side of the shift plate (207); one end of the sliding block (305) is slidably connected to the inner wall of the sliding groove (306); the slider (304) is slidably connected to the shift plate (207) via the sliding block (305) and the sliding groove (306); an internal spring is provided on the inner wall of the sliding groove (306); two ends of the internal spring are respectively fixedly connected to one end of the upper and lower hinge rods (302).

5. The silica aerogel powder particle size screening device according to claim 4, characterized in that: The outer wall of the slider (304) is provided with a toggle mechanism (4), the toggle mechanism (4) comprising a rotating shaft (401), the outer wall of the slider (304) being rotatably connected to the rotating shaft (401), connecting sleeves (402) being rotatably connected at both ends of the rotating shaft (401), the outer wall of the connecting sleeve (402) being fixedly connected to the outer wall of the slider (304), the outer wall of the rotating shaft (401) being fixedly connected to a connecting plate (403), and one side of the connecting plate (403) being fixedly connected to an opening and closing plate (404).

6. A silica aerogel powder particle size screening device according to claim 5, characterized in that: The inner wall of the opening and closing plate (404) is provided with a groove (405), and the inner wall of the connecting sleeve (402) is provided with a built-in torsion spring, the two ends of the built-in torsion spring are respectively fixedly connected to the inner wall of the connecting sleeve (402) and one end of the rotating shaft (401), and the built-in torsion spring is used to reset the rotating shaft (401).

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