CN210399865U - Special drying equipment for dry-method production of aerogel heat preservation felt - Google Patents

Abstract

The utility model discloses a special drying equipment of dry process production aerogel heat preservation felt belongs to aerogel heat preservation felt production technical field, its technical scheme main points are, include box and the hydrofuge device that the stoving chamber by a plurality of intercommunications formed, the hydrofuge device includes hydrofuge pipe and hydrofuge fan, the hydrofuge pipe is connected with the hydrofuge fan, be connected with many hydrofuge branch pipes on the hydrofuge pipe, the stoving chamber intercommunication of hydrofuge branch pipe and every section, the stoving intracavity is equipped with the transmission formula guipure that is parallel to each other and is located the heat source heat dissipation heat exchange layer of guipure below, every stoving intracavity is fixed with circulating fan, the mouth of pipe department of hydrofuge branch pipe is connected with the rectification fan housing, the face at rectification fan housing and the hydrofuge branch pipe mouth of. The utility model is suitable for a dry and wet different felt body can be steadily along with the guipure conveying in the dry and wet ground to the aerogel heat preservation felt after spraying or inhaling the powder on aerogel heat preservation felt production line and dry, has heated air circulation efficiency height, and the stoving time is short, the even advantage of stoving effect.

Description

Special drying equipment for dry-method production of aerogel heat preservation felt

Technical Field

The utility model belongs to the technical field of the aerogel heat preservation felt production technique and specifically relates to a special drying equipment of aerogel heat preservation felt is produced to dry process.

Background

The aerogel heat preservation felt is a flexible heat preservation felt which is formed by compounding nano silicon dioxide aerogel serving as a main body material with glass fiber cotton or a pre-oxidized fiber felt through a special process. The heat-insulating felt has a series of advantages of good heat-insulating effect, small density, strong hydrophobicity and fire resistance and the like, gradually replaces the traditional heat-insulating felt with heat-insulating property which is difficult to meet the current requirement, such as asbestos heat-insulating felt and the like, and is widely used for heat insulation in the fields of industrial pipelines, storage tanks, industrial furnace bodies, military equipment, transportation and the like.

At present, in the production process of the aerogel heat preservation felt, hot air drying and shaping are carried out on the produced aerogel heat preservation felt as a very necessary step. Current drying box is at the stoving in-process, because aerogel felt density is little, the quality is light, often can adsorb in the wind gap department of hydrofuge fan along with the circulation of the incasement hot-air current of drying, can block the wind gap on the one hand, lead to the suction of hydrofuge fan to reduce, reduce the hot-blast circulation efficiency of drying incasement, on the other hand, the felt body that is adsorbed can't in time be conveyed out of drying box, the wet aerogel heat preservation felt that leads to continuously conveying to get into drying box on the guipure is difficult to in time to be dried, cause to pile up the jam even, cause the external appearance color and luster that the overbaking influences the material, influence the whole oven-dry mass.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stoving case of production aerogel heat preservation felt, the felt body of its stoving in-process difference of doing wet can be steadily and snugly followed the guipure conveying, has heated air circulation efficiency height, and the stoving time is short, the even advantage of stoving effect.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a special drying equipment of dry process production aerogel heat preservation felt, includes box and hydrofuge device, the box includes the stoving chamber of a plurality of intercommunication, the hydrofuge device is including setting up at the outside hydrofuge pipe of box and hydrofuge fan, the hydrofuge pipe with the hydrofuge fan is connected, be connected with a plurality of hydrofuge branch pipes on the hydrofuge pipe, the hydrofuge branch pipe with stoving chamber intercommunication, the stoving intracavity is equipped with driven type guipure and the heat source heat dissipation heat transfer layer that is parallel to each other, heat source heat dissipation heat transfer level in the guipure below, every the stoving intracavity is fixed with circulating fan, the mouth of pipe department of hydrofuge branch pipe is connected with the rectification fan housing, the rectification fan housing with the face parallel at the mouth of pipe place of hydrofuge branch pipe.

Through adopting above-mentioned technical scheme, when stoving aerogel heat preservation felt, the aerogel heat preservation felt of treating the stoving is placed and is transported it to each stoving intracavity by the guipure on the driven type guipure in proper order, and the heating of heat source heat dissipation heat transfer layer makes the air temperature in the box reach the operating temperature of drying-machine. The stoving chamber in the box is the intercommunication, and the circulating fan of every stoving intracavity installation can make the hot-air in the box acutely flow, and the arrangement utilizes the draft of hydrofuge fan to constantly transport the box with the hot-air in the box outside through the hydrofuge pipe at the outer hydrofuge device of box, makes the stoving incasement in this scheme form heated air circulation, and simultaneously, the moisture that the stoving process produced can be carried out the stoving case box outside through the hydrofuge pipeline along with the hot-air circulation. The rectification fan housing that hydrofuge branch pipe mouth of pipe department is connected can make the perpendicular draft of acting on the felt body of hydrofuge fan change into the direction of slope and being on a parallel with the felt body, block the partial suction of hydrofuge fan, reduce the suction of hydrofuge fan to the felt body, make the felt body in this scheme stoving case be difficult for appearing adsorbing on the mouth of pipe of hydrofuge branch pipe and block the problem of hydrofuge branch pipe, on the one hand more be favorable to the heated air circulation in the stoving incasement in this scheme, can dry aerogel heat preservation felt more evenly and fast, on the other hand makes aerogel heat preservation felt can be in the meshbelt always, be convenient for the normal conveying of the felt body on the meshbelt.

The utility model discloses further set up to, the mouth of pipe department of hydrofuge branch pipe is fixed with a plurality of flexible pipes, flexible pipe is kept away from the rectification fan housing is connected jointly to the orificial one end of hydrofuge branch pipe.

Through adopting above-mentioned technical scheme, the rectification fan housing passes through the telescopic link and realizes the fixed with the hydrofuge branch pipe, the scalability that utilizes flexible pipe makes rectification fan housing and the orificial distance of hydrofuge branch pipe adjustable, when the stoving case in this scheme was dried the great aerogel heat preservation felt of thick quality, because the gravity increase of the aerogel heat preservation felt of treating the stoving can make its anti suction increase, be difficult for being sucked up by the hydrofuge fan, the user can be guaranteeing to treat under the aerogel heat preservation felt of drying not by the circumstances of sucking up, adjust the rectification fan housing apart from the orificial distance of hydrofuge branch pipe, make the suction of hydrofuge fan increase, thereby increase the heated air circulation efficiency in the stoving incasement, improve the drying efficiency and the oven-dry mass of stoving case in this scheme. When the aerogel heat preservation felt that the oven-dry mass is lighter, can adjust the rectification fan housing apart from the orificial distance of hydrofuge branch pipe for a short time, avoid appearing the felt on the guipure and by the absorbent condition of hydrofuge fan.

The utility model discloses further set up as, the rectification fan housing is one kind in rectangle or the circular shape thin slice, the area of rectification fan housing cross section is greater than the orificial area of hydrofuge branch pipe.

By adopting the technical scheme, the rectifying fan cover can completely block the pipe orifices of the moisture discharging branch pipes, and the effect of improving the wind shielding effect of the rectifying fan cover is achieved.

The utility model discloses further set up to, flexible pipe include a fixed pipe and a plurality of roots with the slip pipe that fixed pipe cup jointed, fixed pipe with the slip pipe is close to the mouth of pipe diameter of hydrofuge branch pipe one end is greater than and is close to the mouth of pipe diameter of rectification fan housing one end, the slip pipe is close to 2 through-holes are seted up to the one end symmetrical formula of fixed pipe, the internal fixation gleitbretter of through-hole, the gleitbretter one side with the fixed laminating of pipe inner peripheral surface slip, the another side with the fixed laminating of slip pipe outer peripheral face.

Through adopting above-mentioned technical scheme, because the slip pipe cup joints in the fixed tube, the mouth of pipe diameter that fixed pipe and slip pipe are close to hydrofuge branch pipe one end is greater than the mouth of pipe diameter that is close to rectification fan housing one end, so when pulling the slip pipe to the guipure direction or promote the slip pipe to hydrofuge branch pipe mouth of pipe direction, the slip pipe can be followed fixed intraductal wall and slided from top to bottom and can not fall out in the fixed tube. The slip sheet fixed on the outer peripheral surface of the sliding pipe through the symmetrical through holes can enable the fixed pipe and the sliding pipe to be sleeved more tightly, when the slip sheet slides in the fixed pipe along with the sliding pipe, the slip sheet has certain toughness because the slip sheet is very thin, and the distance between the outer wall of the sliding pipe and the inner wall of the fixed pipe is increased and the sliding of the sliding pipe is easy to slide because the slip sheet is compressed under stress in the sliding process. When the sliding pipe slides to a certain position and is not stressed any more, the sliding sheet loses pressure and rebounds, so that the distance between the outer wall of the sliding pipe and the inner wall of the fixed pipe is reduced, the sliding pipe is clamped at the position, and the limiting effect is achieved.

The utility model discloses further set up to, the slip pipe outer peripheral face is close to the one end of fixed pipe is equipped with the round bead, the bead with fixed intraductal wall butt, the bead is apart from the distance of slip pipe terminal surface is greater than the through-hole is apart from the distance of slip pipe terminal surface.

Through adopting above-mentioned technical scheme, when the slip pipe is stretched gradually to when being close to the tip of fixed pipe, the pipe diameter of fixed pipe reduces gradually on the one hand, on the other hand the bead has increased the area of contact of slip pipe outer peripheral face and fixed pipe inner peripheral face, it makes slip pipe and fixed pipe cup joint inseparabler to have reduced the distance between the two, more difficult slip, so under the user applys normal tensile condition to the slip pipe, the slip pipe can block in the bead department of its tip and stop sliding, avoided the slip pipe by pull out fixed pipe. Simultaneously, the distance that the bead is apart from the slip pipe terminal surface is greater than the distance setting of through-hole apart from the slip pipe terminal surface, makes the gleitbretter hidden in the slip pipe, and the gleitbretter structure is difficult to be destroyed, has increased the life of flexible pipe.

The utility model discloses further set up to, fixed pipe with follow on the outer peripheral face of slip pipe be equipped with a plurality of recesses in the direction of flexible pipe extension, fixed pipe with on the slip pipe the mutual slidingtype block of recess.

Through adopting above-mentioned technical scheme, the slip pipe is difficult for rotating when sliding in fixed pipe, can make cup joint between the two more stable to the rotation of rectification fan housing in the horizontal direction in this scheme has been avoided.

The utility model discloses further set up as, the width of recess is 0.2 centimetres to 0.3 centimetres, the degree of depth of recess is 0.3 centimetres to 0.5 centimetres.

Through adopting above-mentioned technical scheme, when the sliding tube slides in fixed intraductal, the recess is too narrow or its block effect of too shallow can all be weaker, and the sliding tube easily takes place to rotate in fixed intraductal, and the stability that is difficult for both cup joints, and the recess is too wide or too dark not only can not play synergistic effect to the flexible of pipe, can increase manufacturing cost moreover.

The utility model discloses further set up to, rectification fan housing below be fixed with the parallel air diffuser plate of guipure, the air diffuser plate is last to have seted up the scattered wind hole of a plurality of.

Through adopting above-mentioned technical scheme, can play sparse effect to the hot-blast of stoving intracavity circulation, it is more even to make the aerogel heat preservation felt dry in this scheme stoving case.

To sum up, the utility model discloses following beneficial effect has:

1. through the setting of the rectification fan cover at the pipe orifice of the moisture discharging branch pipe, the suction force of the moisture discharging fan vertically acting on the felt body can be changed into the direction of inclining and being parallel to the felt body, and partial suction force of the moisture discharging fan is blocked, so that the suction force of the moisture discharging fan to the felt body is reduced. On the felt body in this scheme stoving case was difficult for adsorbing the mouth of pipe of hydrofuge branch pipe, on the one hand more was favorable to the heated air circulation in the stoving case in this scheme, can be more even and dry aerogel heat preservation felt fast, on the other hand can make aerogel heat preservation felt be in the guipure always, the normal conveying of felt body on the guipure of being convenient for.

2. Fix the setting that the rectification fan housing is greater than the wet branch pipe mouth of pipe area at wet exhaust pipe mouth of pipe department and rectification fan housing cross-sectional area through flexible pipe, can treat the weight of the aerogel heat preservation felt of drying in the stoving case according to this scheme and carry out corresponding adjustment to the distance of rectification fan housing apart from the guipure, can effectively avoid the moisture exhaust fan to inhale the guipure with aerogel heat preservation felt, can dry the gel heat preservation felt of different weight fast evenly again.

3. Cup joint in the fixed tube through the slip pipe, the mouth of pipe diameter that fixed pipe and slip pipe are close to hydrofuge branch pipe one end is greater than the mouth of pipe diameter that is close to rectification fan housing one end, the setting of fixed gleitbretter on the slip pipe, can play the effect that the slip pipe slided and does not fall out about in the fixed pipe, and can play the slip pipe and fix the arbitrary position at fixed pipe and the effect that does not slide steadily when not the atress, telescopic machanism's stability in this scheme has been increased, easily rectification fan housing plays the effect of keeping out the wind better. The setting of slip tube periphery wall bead can avoid the slip tube to be pulled out fixed pipe.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic view of the overall structure of the drying chamber in this embodiment.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic view of the internal structure of the telescopic tube in this embodiment.

In the figure, 1, a box body; 2. a drying cavity; 3. a circulating fan; 4. a moisture removal device; 5. a moisture removal fan; 6. a moisture removal pipe; 61. a moisture-removing branch pipe; 7. a telescopic pipe; 71. a fixed tube; 72. a sliding tube; 8. a through hole; 9. sliding blades; 10. a rib; 11. a groove; 12. a rectification fan housing; 13. a diffuser plate; 131. a wind-dispersing hole; 14. a mesh belt; 15. and the heat source heat dissipation and exchange layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1 and 2, the drying box for producing aerogel thermal insulation felt disclosed in this embodiment includes a strip-shaped box body 1, a plurality of partition plates are welded in the box body 1 perpendicular to the top of the box body to divide the box body 1 into a plurality of drying cavities 2, and preferably, in this embodiment, nine partition plates divide the box body 1 into ten rectangular drying cavities 2. The width of baffle and the width of box 1 equal, and the height of baffle is half of the box 1 height, makes 2 bottoms in ten stoving chambeies of this embodiment communicate each other, installs the chamber door that is convenient for observe stoving condition and emergency operation in 2 lateral walls in the stoving chamber of every stoving chamber. The welding has the hydrofuge fan 5 that has the effect of breathing in on the roof of the outside of box 1, connects a cylindrical hydrofuge pipe 6 on the hydrofuge fan 5, and the welding has ten cylindrical hydrofuge branch pipes 61 that communicate ten stoving chambeies 2 respectively on the hydrofuge pipe 6, and this hydrofuge branch pipe 61 perpendicular to box 1's top surface sets up. A circulating fan 3 with an air supply function is respectively installed at the top of the box body 1 corresponding to each drying cavity 2, the circulating fan 3 is installed at the top of the box body 1 perpendicular to the box body, and the circulating fan 3 is communicated with the drying cavities 2 to supply air into the drying cavities 2 so as to form circulating airflow in the box body 1.

Referring to fig. 2, the top of each drying cavity 2 is a pipe orifice of the moisture discharging branch pipe 61, two telescopic pipes 7 which can be extended and retracted in the vertical direction are symmetrically welded at the pipe orifice, one ends of the telescopic pipes 7 far away from the pipe orifice of the moisture discharging branch pipe 61 are jointly welded with a rectangular or round lamellar rectification fan cover 12, preferably, the rectification fan cover in this embodiment is a rectangular thin sheet, the cross-sectional area of the rectification fan cover 12 is larger than the pipe orifice area of the moisture discharging branch pipe 61, and the rectification fan cover 12 is parallel to the pipe orifice of the moisture discharging branch pipe 61, preferably, the cross-sectional area of the rectification fan cover 12 in this embodiment is 1.3 times of the pipe orifice area of. The number of the rectification wind hoods 12 is the same as that of the moisture discharging branch pipes 61, so that a pipe opening of each moisture discharging branch pipe 61 is connected with one rectification wind hood 12. An air diffuser plate 13 with air diffusing holes 131 is welded below the rectification fan housing 12, a mesh belt 14 capable of conveying aerogel heat preservation felt is installed below the air diffuser plate 13, and a heat source heat dissipation and exchange layer 15 is installed below the mesh belt 14. The air diffuser 13, the mesh belt 14 and the heat source heat dissipation and heat exchange layer 15 are all parallel to the rectification fan housing 12 and are all installed at the bottom of the ten drying cavities 2, so that the air diffuser 13, the mesh belt 14 and the heat source heat dissipation and heat exchange layer 15 in the ten drying cavities 2 are the same, and the aerogel heat insulation felt is easy to convey and dry uniformly.

Referring to fig. 3, the telescopic tube 7 includes a fixed tube 71 welded to the moisture exhaust branch tube 61 and a sliding tube 72 welded to the rectification wind cover 12, the diameter of the sliding tube 72 is smaller than that of the fixed tube 71 so that the fixed tube 71 and the sliding tube 72 are sleeved together, and the diameter of the tube opening of the fixed tube 71 and the sliding tube 72 near one end of the moisture exhaust branch tube 61 is larger than that of the tube opening near one end of the rectification wind cover 12, so that the sliding tube 72 is not easy to slide out when sliding in the fixed tube 71, and the stability of the telescopic tube 7 can be.

Referring to fig. 4, 2 through holes 8 are symmetrically formed in one end of the sliding tube 72 close to the fixed tube 71, a sliding sheet 9 is fixed in each through hole 8, a hemispherical protrusion matched with the through hole 8 is arranged on one side of the sliding sheet 9 close to the outer peripheral wall of the sliding tube 72, so that the sliding sheet 9 can be fixed in each through hole 8 through the protrusion, one side of the sliding sheet is fixedly attached to the outer peripheral surface of the sliding tube 72, and the other side of the sliding sheet is slidably attached to the inner peripheral surface of the fixed. When the sliding sheet 9 slides in the fixed tube 71 along with the sliding tube 72, the sliding sheet 9 is a thin arc-shaped square sheet, so that the sliding sheet has certain toughness, can be deformed correspondingly along with the sliding or stopping of the sliding tube 72, and has a limiting effect on the sliding tube 72. One end of the peripheral surface of the sliding pipe 72, which is close to the fixed pipe 71, is provided with a circle of convex ribs 10 which abut against the inner wall of the fixed pipe 71, the distance between the convex ribs 10 and the end surface of the sliding pipe 72 is greater than the distance between the through hole 8 and the end surface of the sliding pipe 72, so that the sliding pipe 72 can be prevented from being pulled out of the fixed pipe 71 when sliding, and the sliding sheet 9 can be hidden to protect the integrity of the function of the sliding sheet 9. The outer peripheral surfaces of the fixed pipe 71 and the sliding pipe 72 are respectively provided with a groove 11 capable of mutually sliding and clamping along the extending direction of the telescopic pipe 7, the width of the groove 11 is 0.2 cm to 0.3 cm, the depth of the groove 11 is 0.3 cm to 0.5 cm, and the preferred width and depth of the groove 11 are both 0.3 cm.

The implementation principle of the above embodiment is as follows: when the aerogel heat preservation felt is dried, the aerogel heat preservation felt to be dried is placed on the transmission type mesh belt 14 and is sequentially conveyed into the drying cavities 2 through the mesh belt 14, and the heat source heat dissipation and exchange layer 15 heats the air in the box body 1 to reach the working temperature of the dryer. Drying chamber 2 in the box 1 is the intercommunication, the circulating fan 3 of installation can make the hot-air in the box 1 violently flow in every drying chamber 2, the arrangement utilizes the draft of hydrofuge fan 5 at the outer hydrofuge device 4 of box 1 outside the box 1 to constantly transport the box 1 through hydrofuge pipe 6 with the hot-air in the box 1, make the incasement of drying in this embodiment form heated air circulation, and simultaneously, the moisture that the drying process produced can be carried out the drying case box 1 through 6 ways along with the hot-air circulation. The rectification fan housing 12 that the mouth of pipe department of hydrofuge branch pipe 61 connects can make the draft of hydrofuge fan 5 vertical action on the felt body change into the slope and be on a parallel with the direction of felt body, block the partial suction of hydrofuge fan, reduce the suction of hydrofuge fan 5 to the felt body, make the felt body in this embodiment stoving case be difficult for appearing adsorbing on the mouth of pipe of hydrofuge branch pipe 61 and block the problem of hydrofuge branch pipe 61, on the one hand more be favorable to the heated air circulation in stoving case box 1 in this embodiment, can dry aerogel heat preservation felt more evenly and fast, on the other hand make aerogel heat preservation felt can be in on guipure 14 always, be convenient for the normal conveying of felt body on guipure 14.

When the stoving case in this embodiment is dried the great aerogel heat preservation felt of thick quality, because the gravity of the aerogel heat preservation felt of treating the stoving increases and makes its anti suction increase, be difficult for being sucked up by hydrofuge fan 5, the user can be under the condition that ensures the aerogel heat preservation felt of treating the stoving not sucked up, utilize flexible pipe 7's scalability to adjust the orificial distance of rectification fan housing 12 apart from hydrofuge branch pipe 61 greatly, make the suction of hydrofuge fan 5 increase, thereby increase the heated air circulation efficiency in the stoving case box 1, improve the drying efficiency and the drying quality of stoving case in this embodiment. When the aerogel heat preservation felt that the drying quality is lighter, can adjust the distance of rectification fan housing 12 apart from the wet exhaust branch pipe 61 mouth of pipe for a short time, avoid appearing the felt body on guipure 14 and by the absorptive condition of wet exhaust fan 5.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a special drying equipment of dry process production aerogel heat preservation felt, includes box (1) and hydrofuge device (4), box (1) includes stoving chamber (2) of a plurality of intercommunication, hydrofuge device (4) are including setting up hydrofuge pipe (6) and hydrofuge fan (5) in box (1) outside, hydrofuge pipe (6) with hydrofuge fan (5) are connected, be connected with a plurality of hydrofuge branch pipe (61) on hydrofuge pipe (6), hydrofuge branch pipe (61) with stoving chamber (2) intercommunication, be equipped with driven type guipure (14) and heat source heat dissipation heat transfer layer (15) that are parallel to each other in stoving chamber (2), heat source heat dissipation heat transfer layer (15) are located guipure (14) below, every stoving chamber (2) internal fixation has circulating fan (3), its characterized in that: the mouth of pipe department of hydrofuge branch pipe (61) is connected with rectification fan housing (12), rectification fan housing (12) with the face at hydrofuge branch pipe (61) mouth of pipe place is parallel.

2. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 1, is characterized in that: a plurality of telescopic pipes (7) are fixed at the pipe openings of the moisture discharging branch pipes (61), and one ends, far away from the pipe openings of the moisture discharging branch pipes (61), of the telescopic pipes (7) are connected with the rectification fan cover (12) together.

3. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 2, is characterized in that: the rectifying fan housing (12) is one of rectangular or round sheets, and the area of the cross section of the rectifying fan housing (12) is larger than the area of the pipe orifice of the moisture discharging branch pipe (61).

4. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 3, is characterized in that: flexible pipe (7) include a fixed pipe (71) and a plurality of with fixed pipe (72) that pipe (71) cup jointed, fixed pipe (71) with slide pipe (72) are close to the mouth of pipe diameter of hydrofuge branch pipe (61) one end is greater than and is close to the mouth of pipe diameter of rectification fan housing (12) one end, slide pipe (72) are close to 2 through-holes (8) are seted up to the one end symmetry formula of fixed pipe (71), through-hole (8) internal fixation gleitbretter (9), gleitbretter (9) one side with fixed pipe (71) inner peripheral surface sliding fit, the another side with slide pipe (72) outer peripheral surface fixed fit.

5. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 4, is characterized in that: the outer peripheral surface of the sliding pipe (72) is close to one end of the fixed pipe (71) and is provided with a circle of convex ribs (10), the convex ribs (10) are abutted to the inner wall of the fixed pipe (71), and the distance between each convex rib (10) and the end surface of the sliding pipe (72) is larger than the distance between each through hole (8) and the end surface of the sliding pipe (72).

6. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 5, is characterized in that: a plurality of grooves (11) are arranged on the peripheral surfaces of the fixed pipe (71) and the sliding pipe (72) along the extending direction of the telescopic pipe (7), and the grooves (11) on the fixed pipe (71) and the sliding pipe (72) are mutually clamped in a sliding manner.

7. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 6, wherein the special drying equipment comprises: the width of the groove (11) is 0.2 cm to 0.3 cm, and the depth of the groove (11) is 0.3 cm to 0.5 cm.

8. The special drying equipment for producing the aerogel thermal insulation felt by the dry method according to claim 7, is characterized in that: an air diffuser plate (13) parallel to the mesh belt (14) is fixed below the rectification fan cover (12), and a plurality of air diffusing holes (131) are formed in the air diffuser plate (13).

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