CN112047714A

CN112047714A - Homogenization method and homogenization unit for aerogel heat insulation felt

Info

Publication number: CN112047714A
Application number: CN202010948098.9A
Authority: CN
Inventors: 莫伟军; 刘景松; 陈强
Original assignee: Shandong Xinlanghua Technology Co ltd
Current assignee: Shandong Xinlanghua Technology Co ltd
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2020-12-08

Abstract

The invention discloses a homogenizing method for an aerogel heat insulation felt, wherein the aerogel heat insulation felt is obtained by drying a glass fiber felt (1) hung with aerogel colloid through a drying unit (400), and the homogenizing method comprises the following steps: while the drying unit (400) works, a material receiving roll (205) of the glass fiber mat (1) which is hung with aerogel colloid and is not ready to be put into the drying unit (400) for drying is placed on a homogenizing bracket (205) of the homogenizing unit (300), so that the material receiving roll (205) keeps a continuous rotation state on the homogenizing bracket (301). In addition, the invention also discloses a homogenizing unit for the method. This application is through in the work of drying unit, and the receipts after the kiss-coating are rolled up and are carried out homogenization in step, can keep and improve the homogeneity of the aerogel colloid on the glass fiber mat, have improved production efficiency through parallel processing simultaneously.

Description

Homogenization method and homogenization unit for aerogel heat insulation felt

Technical Field

The application relates to the technical field of heat insulation materials, in particular to a manufacturing process and equipment of a heat insulation felt containing silica aerogel, and particularly relates to a homogenizing method and a homogenizing unit for the aerogel heat insulation felt in the manufacturing process and the equipment.

Background

CN 206751055U discloses an aerogel felt unreeling and laminating device, which comprises an unreeling device, a rough machining device and a finish machining device which are connected in sequence; a rough machining device and a finish machining device are adopted to fully soak the aerogel felt with glue by extruding and soaking for multiple times so as to prevent the surface from falling powder; the driving roller and the driven roller are installed in the sliding groove, the baffle plate arranged on one side of the movable seat is connected with the first driven roller, the second driven roller and the third driven roller through the transverse lead screw, so that the gap between the driven roller and the driving roller can be adjusted, the efficiency in the production process is improved, the repeated use of glue in the soaking groove is ensured, the production cost is reduced, and the performance of the aerogel felt is improved.

CN 206996960U discloses a soaking and coating device for producing aerogel composite heat insulation felt, which comprises a frame, wherein the upper end of the frame is provided with a high-position supporting surface and a bottom-position supporting surface which are arranged in front and at back; a fibrofelt supporting and unwinding device is arranged above the low-position supporting surface, and a material-soaking and then-homogenizing press roller device and a material guide roller which are arranged in the front and back are arranged above the high-position supporting surface; a material storage tank is arranged in the rack below the material homogenizing and pressing roller device, and a material pressing roller which is arranged on the rack and can be adjusted up and down is arranged in the material storage tank; the homogenizing opposite-pressing roller device comprises a driving homogenizing pressing roller, a follow-up homogenizing pressing roller and two supporting frames, wherein the driving homogenizing pressing roller, the follow-up homogenizing pressing roller and the two supporting frames are arranged at the front end and the rear end of the homogenizing opposite-pressing roller device and are used for supporting the two homogenizing pressing rollers, the driving homogenizing pressing roller is connected with a power source in a driving mode, the follow-up homogenizing pressing roller is supported on the two supporting frames in a front-rear adjustable mode, and a space for the soaked fiber felt to penetrate is reserved between. This soak coating device has realized the even coating of aerogel on thermal-insulated felt, helps improving the production efficiency of aerogel thermal-insulated felt.

CN 111364239A discloses a method for preparing a silica aerogel heat preservation felt with long-acting conductivity under normal pressure, which comprises the following steps: adding water into sodium silicate to prepare a silicon dioxide aqueous solution for later use; adding cation exchange resin into an ion exchange column, and carrying out ion exchange on a sodium silicate aqueous solution through the ion exchange column; adding the mixture into a dispersion grinding kettle, adjusting the pH value by using ammonia water, adding a stabilizer, adding an inorganic conductive agent, starting stirring, grinding and dispersing; concentrating the materials, soaking the glass fiber felt into the solution at normal temperature until the glass fiber felt is saturated, and fishing out the glass fiber felt; putting the materials into a closed exchange tank, adding ammonia water, heating and preserving heat; putting into a distillation kettle, adding n-butanol, heating to boil, and dehydrating and distilling; and drying the mixture under the protection of nitrogen by utilizing microwave drying to prepare the silicon dioxide aerogel heat preservation felt with conductivity.

The above prior art discloses relevant background information regarding aerogel thermal insulation blankets and those skilled in the art will be able to understand the present application with reference to the above prior art.

Disclosure of Invention

The technical problem to be solved by the present application is to provide a homogenization method and a homogenization unit for aerogel thermal insulation blankets to reduce or avoid the aforementioned problems.

In order to solve the above technical problem, the present application provides a homogenization method for an aerogel heat insulation blanket, the aerogel heat insulation blanket is obtained by drying a glass fiber blanket hung with aerogel colloid through a drying unit, wherein the homogenization method comprises: when the drying unit works, the material receiving roll of the glass fiber mat which is hung with the aerogel colloid and is not placed in the drying unit for drying is placed on the homogenizing bracket of the homogenizing unit, so that the material receiving roll keeps a continuous rotating state on the homogenizing bracket.

Preferably, the periphery of the glass fiber mat wound on the winding roll is provided with a fixing structure for preventing the scattering.

Preferably, the fixing structure is a binding rope.

The present application also provides a homogenizing unit for the above method, wherein the homogenizing unit comprises at least one homogenizing bracket, the material roll is placed on the homogenizing bracket, and the material roll is driven by a motor to keep a non-stop rotating state.

Preferably, the homogenizing bracket comprises a bracket, an active rotating shaft and a passive rotating shaft which are driven by a motor are supported on the bracket in parallel, and the material collecting roll is supported above the active rotating shaft and the passive rotating shaft.

Preferably, the two ends of the driving rotating shaft and the driven rotating shaft are respectively provided with a supporting roller which rotates along with the rotating shaft in a penetrating way, and bosses are formed on the outer edges of the supporting rollers so as to clamp the material receiving roll between the two bosses opposite to each other on the same rotating shaft.

This application is through in the work of drying unit, and the receipts after the kiss-coating are rolled up and are carried out homogenization in step, can keep and improve the homogeneity of the aerogel colloid on the glass fiber mat, have improved production efficiency through parallel processing simultaneously.

Drawings

The drawings are only for purposes of illustrating and explaining the present application and are not to be construed as limiting the scope of the present application. Wherein the content of the first and second substances,

FIG. 1 is a schematic illustration showing a process flow for manufacturing an aerogel insulation blanket according to one embodiment of the present application;

FIG. 2 shows a schematic structural view of a homogenizing unit for an aerogel insulation blanket according to one embodiment of the present application;

FIG. 3 shows a schematic view of the homogenization carrier of the homogenization unit of FIG. 2;

FIG. 4 shows a side view of the homogenization bracket of FIG. 3.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present application, embodiments of the present application will now be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

As shown in fig. 1, the present application provides a manufacturing process and apparatus related to an insulation blanket containing silica aerogel, and more particularly, to a homogenizing method and a homogenizing unit for an aerogel insulation blanket in the manufacturing process and apparatus. As shown in fig. 1 in particular, the apparatus for manufacturing an aerogel thermal insulation blanket of the present application may sequentially include a glue applying unit 200, a homogenizing unit 300, and a drying unit 400.

Wherein, be equipped with the aerogel colloid in the steeping vat of glue hanging unit 200, glass fiber mat 1 can be scribbled the aerogel colloid extrusion on glass fiber mat 1 through extrusion rubberizing processes such as the steeping vat of glue hanging unit 200. Thereafter, the glass fiber mat 1 with the aerogel colloid suspended thereon may be placed in a drying unit 400 to be dried, so that the thermal insulation mat containing silica aerogel may be obtained. That is, the aerogel thermal insulation blanket of the present application is obtained by drying the glass fiber blanket 1 in which the aerogel colloid is suspended by the drying unit 400. In addition, the present application provides a homogenizing unit 300 capable of parallel processing between the glue applying unit 200 and the drying unit 400, for temporarily storing the glass fiber mat 1 which has been glued and not dried and maintaining the uniformity of the aerogel glue on the glass fiber mat 1 while the drying unit 400 is operated. As will be described in further detail below.

The gluing unit 200 comprises a feeding roll 201 for conveying the glass fiber mat 1, at least one glue dipping tank 202 filled with aerogel colloid, at least one extrusion tank 203 and a receiving roll 205 for winding the glass fiber mat 1 hung with aerogel colloid. In the illustrated embodiment, two dip tanks are shown, that is, a second dip tank 204 is further disposed behind the extrusion tank 203 of the glue hanging unit 200, and the second dip tank 204 is also filled with aerogel colloid. The glass fiber mat 1 is input into the glue dipping tank 202 through the material feeding roll 201, and the aerogel colloid dispersed in the glue dipping tank 202 is extruded into the glass fiber mat 1 as much as possible through the extrusion of the rollers in the glue dipping tank 202, so that the powder falling after drying is avoided. In order to increase the content of the aerogel in the glass fiber mat 1, after the impregnation, the glass fiber mat 1 is further pressed by a roller in the pressing tank 203, so that the aerogel colloid in the glass fiber mat 1 is fixed on the glass fiber mat 1 to avoid falling off, and the liquid in the glass fiber mat can be extruded and recycled. In addition, by providing a plurality of pressing tanks 203 and a dip tank (for example, the second dip tank 204), the content of the aerogel in the glass fiber mat 1 can be further increased.

After the glass fiber mat 1 coated with the aerogel colloid is wound into the material receiving roll 205, the material receiving roll 205 may be directly placed into the drying unit 400 for drying. As previously mentioned, the present application also provides a process for homogenizing the stock roll 205 using the homogenizing unit 300 prior to drying. That is, while the drying unit 400 performs the drying process on the previous batch of homogenized material receiving rolls 205, the material receiving rolls 205 of the glass fiber mat 1 which are hung with the aerogel colloid and are not put into the drying unit 400 are temporarily stored, so that the material receiving rolls are kept in a continuous rotation state, and the uniformity of the aerogel colloid on the glass fiber mat 1 is maintained. Finally, after the previous material receiving roll 205 is dried, the next material receiving roll 205 is homogenized, and the homogenized material receiving roll 205 is moved into the drying unit 400 to be dried, so that the aerogel heat insulation felt is obtained. Specifically, the drying unit 400 of the present application may include a sealed drying tank 401, and the homogenized material roll 205 is placed in the sealed drying tank 401 for drying by vacuum assisted warming.

The basic concept of the homogenization process of the present application is described in further detail below with reference to the accompanying drawings.

The basic concept of the homogenization process of the present application is: the drying time of the roll 205 in the drying unit 400 is very long, sometimes up to tens of hours or even tens of hours, while the time for completing the gluing operation of the roll 1 of glass fiber mat only needs about one hour, relatively speaking, the time for one drying operation of the drying unit 400 is much longer than that for one gluing operation of the gluing unit 200. If the kiss-coating operation is stopped while the drying unit 400 is operated, the production efficiency may be low; and it is too costly to provide many drying units 400.

If the rubberizing operation is synchronously performed while drying, the rubberized material receiving roll 205 is placed still, after the drying unit 400 finishes drying a batch, the placed material receiving roll 205 is sequentially moved into the drying unit 400, and therefore some production efficiency can be relatively improved.

However, since the glass fiber mat 1 on the take-up roll 205 is in a wet state in which the glass fiber mat 1 is soaked with the aerogel colloid, the aerogel colloid on the glass fiber mat 1 flows down to the lower portion of the take-up roll 205 by gravity when left standing. In the process of standing for drying for a long time, not only can a large amount of liquid flow down from the lower side of the material collecting roll 205 and need additional treatment, but also aerogel colloid can flow and collect at the lower side of the material collecting roll 205, so that the distribution of the aerogel on the dried glass fiber mat 1 can be uneven, and the stability of the product quality of the aerogel heat insulation mat is seriously affected.

Based on the above problem, the present application provides a homogenization method, that is, while waiting for drying, the material receiving roll 205 with the coating keeps a continuous rotation state. Through the rotation that does not stop, the direction of trickling of the aerogel colloid in the glass fiber mat 1 on the material receiving roll 205 can continuously change, the stickness of aerogel colloid is relatively great, as long as set up the rotational speed of material receiving roll 205 and be 5-10 revolutions per minute, the aerogel colloid will overturn under the condition that has not come away from yet and flow, can ensure that the aerogel colloid can not break away from material receiving roll 205, and the homogenization method of this application need not to set up extra cistern and collects the liquid of handling trickling. And because the colloid constantly changes direction under the action of gravity, the problem that aerogel colloid flows and is collected to the lower side of the material collecting roll 205 can not occur, and the uniformity of the aerogel colloid on the glass fiber mat 1 can be kept. In addition, through the rotation that does not stop, the inhomogeneous place of original kiss-coating also can obtain further homogenization, is favorable to finally forming the thermal-insulated felt that contains even aerogel granule.

Specifically, the present homogenization method for an aerogel insulation blanket comprises: while the drying unit 400 is operating, the material roll 205 of the glass fiber mat 1, which has been hung with the aerogel colloid and has not been put into the drying unit 400 for drying, is placed on the homogenizing bracket 205 of the homogenizing unit 300, so that the material roll 205 is kept in a non-stop rotating state on the homogenizing bracket 301.

In order to prevent the glass fiber mat 1 from being loosened and loosened when the material receiving roll 205 rotates, it is preferable that the glass fiber mat 1 wound around the material receiving roll 205 is provided at the outer periphery thereof with a fixing structure (not shown) for preventing the loosening. In another embodiment, the securing structure is preferably a binding rope.

The detailed structure of the homogenizing unit of the present application is described in further detail below with reference to the accompanying drawings.

Based on the basic idea of the present application, a homogenizing unit for aerogel insulation blanket is proposed, as shown in fig. 1-4. The homogenization unit 300 of the present application may include at least one homogenization bracket 301, in the particular embodiment shown in fig. 1, a total of three homogenization brackets 301 are shown, one stock roll 205 may be placed on each homogenization bracket 301 for homogenization, each homogenization bracket 301 is provided with a motor 302 and a speed reducer 303, and the stock rolls 205 may be maintained in a non-stop rotational state on the homogenization brackets 301 by the motor 302.

In the embodiment shown in fig. 1, the speed reducer 303 rotates the roll of stock material 205 via a belt. In the embodiment shown in fig. 2-4, the reducer 303 is coupled to rotate the roll 205 via a shaft.

The homogenizing unit 300 of the present application and its structure are described in detail below with reference to fig. 2-4. For ease of illustration, in the embodiment shown in fig. 2-4, the homogenizing unit 300 is shown to contain only one homogenizing tray 301, although it will be understood by those skilled in the art that the homogenizing unit 300 may include a plurality of homogenizing trays 301 waiting to be dried in sequence, as needed for the time waiting to be dried.

The illustrated homogenizing bracket 301 includes a support 3011, an active spindle 3012 and a passive spindle 3013 driven by the motor 302 are supported in parallel on the support 3011, support rollers 3014 rotating together with the spindles are installed at both ends of the active spindle 3012 and the passive spindle 3013, and bosses 3015 are formed on the outer edges of the support rollers 3014 for clamping the material roll 205 between two bosses 3015 opposite to each other on the same spindle to prevent the material roll 205 from falling due to position deviation. The motor 302 and the speed reducer 303 are supported on one side of the support 3011, the power of the motor 302 is reduced by the speed reducer 303, and the speed reducer 303 is connected with one end of the driving rotating shaft 3012. The material collecting roll 205 is supported above the driving rotating shaft 3012 and the driven rotating shaft 3013, the speed reducer 303 is driven by the motor to further drive the driving rotating shaft 3012, and finally the material collecting roll 205 is driven to rotate by the supporting roller 3014, and the purpose of homogenization is achieved by the continuous rotation of the material collecting roll 205.

To sum up, this application is through in the work of drying unit, and the receipts after the kiss are rolled up and are carried out homogenization in step, can keep and improve the homogeneity of the aerogel colloid on the glass fiber mat, has improved production efficiency through parallel processing simultaneously.

It should be appreciated by those skilled in the art that while the present application is described in terms of several embodiments, not every embodiment includes only a single embodiment. The description is thus given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims and are to be interpreted as combined with each other in a different embodiment so as to cover the scope of the present application.

The above description is only illustrative of the present invention and is not intended to limit the scope of the present invention. Any equivalent alterations, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of this application shall fall within the scope of this application.

Claims

1. A homogenization method for an aerogel thermal insulation blanket obtained by drying a glass fiber blanket (1) coated with aerogel colloid by a drying unit (400), characterized in that it comprises: while the drying unit (400) works, a material receiving roll (205) of the glass fiber mat (1) which is hung with aerogel colloid and is not ready to be put into the drying unit (400) for drying is placed on a homogenizing bracket (205) of the homogenizing unit (300), so that the material receiving roll (205) keeps a continuous rotation state on the homogenizing bracket (301).

2. The method according to claim 1, characterized in that the periphery of the glass fiber mat (1) wound on the take-up reel (205) is provided with a fixing structure that prevents unraveling.

3. The method of claim 2, wherein the securing structure is a binding rope.

4. A homogenizing unit for the method according to one of the claims 1 to 3, characterized in that the homogenizing unit (300) comprises at least one homogenizing tray (301), the stock rolls (205) being placed on the homogenizing tray (301) and being kept in a non-stop rotational state by the stock rolls (205) being driven by a motor (302).

5. The homogenizing unit according to claim 4, characterized in that the homogenizing bracket (301) comprises a support (3011), on which support (3011) an active spindle (3012) and a passive spindle (3013) driven by a motor (302) are supported in parallel, the stock roll (205) being supported above the active spindle (3012) and the passive spindle (3013).

6. The homogenizing unit according to claim 5, characterized in that the active shaft (3012) and the passive shaft (3013) are provided with support rollers (3014) at both ends, which rotate with the shafts, and the support rollers (3014) have bosses (3015) formed at the outer edges to clamp the material roll (205) between two opposite bosses (3015) on the same shaft.