Aerogel felt gluing and conveying device

Abstract

The utility model discloses an aerogel felt gluing and conveying device which is characterized in that a backflow branch is additionally arranged on a sol and catalyst discharging pipeline, a flowmeter is additionally arranged on the backflow branch, and whether sol and a catalyst can be connected into a gluing spray head or not can be judged by observing whether flow display on the backflow branch is stable or not. Therefore, the problems of no gel or poor gel effect caused by large flow fluctuation and difficult control of the ratio of the sol to the catalyst due to pumping are effectively solved. Meanwhile, the catalyst tank is arranged to be connected with the sol discharging pipeline through a plurality of pipelines, so that the contact area of the catalyst and the sol can be effectively increased, the mixing uniformity of the catalyst and the sol is improved, the gelling effect is enhanced, and the yield and the yield of products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerogel felt preparation, and particularly relates to an aerogel felt glue coating and conveying device. Background Art

[0002] Aerogel felt is a lightweight thermal insulation material with a porous structure. It has excellent thermal insulation performance, and at the same time also has characteristics such as flexibility, hydrophobicity, and long service life. Due to its unique structure and properties, it shows broad application potential in multiple fields. For example, in high-temperature industrial equipment, it is used for heat preservation of pipelines, reaction kettles, etc., which helps to improve energy efficiency and reduce energy consumption; in the thermal management of spacecraft, the lightweight and high-efficiency thermal insulation characteristics of aerogel felt make it an indispensable material, which helps to reduce the weight of spacecraft and optimize performance.

[0003] However, during the production process, there are always some parts of the wet gel felt that are not gelled or have poor gelation effect. When there is a local non-gelation phenomenon in a roll of wet gel felt, the following consequences will occur: the non-gelled part will peel off during the subsequent aging and drying process, resulting in no aerogel on the substrate, thereby affecting the product performance and reducing the product yield and output. In addition, the peeled non-gelled part may also flow into the pipeline along with the solvent and cause blockage of the pipeline after gelation.

[0004] The main reasons for the partial non-gelation phenomenon are as follows: in actual production, the sol and catalyst in the sol tank and catalyst tank are directly pumped to the glue coating tray through the connected pipelines, and then the aerogel felt substrate is impregnated with glue. This conveying method has two problems. First, the flow rate fluctuates greatly, and it is difficult to control the ratio of sol to catalyst, which affects the gelation effect. Second, the mixing contact time of the sol and catalyst is relatively short, and the mixing is not uniform enough, which easily leads to partial non-gelation of the wet gel felt. And if the contact time between the sol and catalyst is longer, it is easy to cause the sol to gel in the glue coating tray or directly gel in the pipeline, resulting in pipeline blockage, affecting production capacity, and causing waste of manpower, material resources, and resources. Summary of the Utility Model

[0005] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide an aerogel felt glue coating and conveying device to solve the problems of large flow rate fluctuation and difficult control of the ratio of sol to catalyst in the existing glue coating and conveying device, resulting in poor gelation effect.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An aerogel felt glue conveying device comprises a sol tank and a catalyst tank, wherein the sol tank and the catalyst tank are connected to a glue spray head through a first discharge pipeline and a second discharge pipeline respectively; a first reflux branch and a second reflux branch are respectively provided on the sol tank and the catalyst tank, wherein the first reflux branch is provided between the first discharge pipeline and the feed inlet of the sol tank, and the second reflux branch is provided between the second discharge pipeline and the feed inlet of the catalyst tank; a first valve is provided on the first discharge pipeline between the junction of the first discharge pipeline and the first reflux branch and the glue spray head, and a second valve is provided on the second discharge pipeline between the junction of the second discharge pipeline and the second reflux branch and the glue spray head; valves and flow meters are provided on the reflux branches.

[0008] Furthermore, the second discharge pipelines are 2 to 3, and the corresponding second reflux branches are also 2 to 3; all the second discharge pipelines are connected to the first discharge pipeline of the sol tank.

[0009] Furthermore, a third valve is provided on the first discharge pipeline between the junction of the first discharge pipeline and the first reflux branch and the sol tank, and a fourth valve is provided on the second discharge pipeline between the junction of the second discharge pipeline and the second reflux branch and the catalyst tank.

[0010] Furthermore, the first discharge pipeline and the second discharge pipeline are connected to a glue spray nozzle after merging, and the glue spray nozzle is detachably connected to the pipeline.

[0011] Furthermore, the glue coating nozzle includes a tower body, with a liquid inlet hole on the top and a liquid outlet hole on the bottom; a plurality of tower plates are horizontally staggered in the tower body; one end of the tower plate in the length direction is fixed to the inner wall of the tower body, and the other end is suspended to the middle of the tower body and is slightly larger than the radius or width of the tower body; a liquid guide groove is provided in the middle of the tower plate along the length direction, and a plurality of liquid passing holes are evenly provided on both sides of the width direction of the liquid guide groove; the liquid guide grooves on two adjacent tower plates are in the same vertical plane, so that the liquid flows from top to bottom in turn along the direction of the liquid guide grooves of each tower plate, that is, the liquid flow rate is changed and the length of the path through which the liquid flows is increased through the liquid guide grooves and liquid passing holes of each tower plate; the liquid inlet hole is provided at one end of the top tower plate close to the inner wall.

[0012] Furthermore, flow meters are provided on both the first discharge pipeline and the second discharge pipeline.

[0013] Furthermore, stirring paddles are provided in the sol tank and the catalyst tank.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the glue - applying conveying device of the present utility model, a reflux branch is added to the pipelines for discharging sol and catalyst, and a flowmeter is added to the reflux branch. By observing whether the flow rate on the reflux branch is stable, it can be determined whether the sol and catalyst can be connected to the glue - applying nozzle, thus effectively solving the problems of large flow rate fluctuations caused by pumping, difficult control of the ratio of sol to catalyst, resulting in non - gelation or poor gelation effect.

[0016] 2. The present utility model also sets the catalyst tank to be connected to the sol discharging pipeline through multiple pipelines, which can effectively increase the contact area between the catalyst and the sol, improve the uniformity of the mixture of the catalyst and the sol, enhance the gelation effect, and thus improve the yield and output of the product.

[0017] 3. The glue - applying nozzle of the present utility model adopts a plate - column structure for the first time. The liquid - passing holes on the trays enable the liquid to be evenly distributed on the trays, enhancing the uniformity of the mixture of the catalyst and the sol, and thus enhancing the gelation effect. The liquid - guiding groove arranged in the middle of the tray can increase the liquid flow rate, avoiding the problem of premature gelation caused by too long mixing time of the catalyst and the sol. In addition, the detachable connection between the glue - applying nozzle and the sol discharging pipeline can avoid the blockage problem caused by the residue of the sol during continuous production. When the flow rate is found to be unstable, it can be replaced and cleaned in time, improving the production efficiency. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the glue - applying conveying device of the present utility model;

[0019] Figure 2 It is an enlarged schematic diagram of the tray structure in the glue - applying nozzle of the present utility model.

[0020] In the figure: sol tank 1, catalyst tank 2, glue - applying nozzle 3, first discharging pipeline 4, second discharging pipeline 5, first reflux branch 6, second reflux branch 7, third valve 8, first valve 9, fourth valve 10, second valve 11, tray 12, liquid - guiding groove 13, liquid - passing hole 14, stirring paddle 15, liquid inlet hole 16, liquid outlet hole 17. Detailed Embodiments

[0021] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. In addition, terms such as "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] As Figure 1 shown, a glue coating and conveying device for aerogel felt includes a sol tank 1 and a catalyst tank 2. The sol tank 1 and the catalyst tank 2 are respectively communicated with a glue coating nozzle 3 through a first discharge pipeline 4 and a second discharge pipeline 5. First return branches 6 and second return branches 7 are respectively provided on the sol tank 1 and the catalyst tank 2. The first return branch 6 is arranged between the first discharge pipeline 4 and the inlet of the sol tank 1, and the second return branch is arranged between the second discharge pipeline 5 and the inlet of the catalyst tank 2. A first valve 9 is provided on the first discharge pipeline 4 between the junction of the first discharge pipeline 4 and the first return branch 6 and the glue coating nozzle 3. A second valve 11 is provided on the second discharge pipeline 5 between the junction of the second discharge pipeline 5 and the second return branch 7 and the glue coating nozzle 3. Valves and flow meters are provided on the return branches.

[0024] Working principle: When using the device of the present utility model for glue coating and conveying, first close the first valve 9, the second valve 11 and the valve on the reflux branch. After the sol is fully hydrolyzed and the catalyst reacts evenly, then open the valve on the reflux branch, and use a pump to convey the liquid in the pipeline, so as to carry out the reflux of the sol and the catalyst. After the flowmeter on the reflux branch is stable, close the valve on the reflux branch, and open the first valve 9 and the second valve 11, and simultaneously convey the sol and the catalyst to the glue coating nozzle 3 by pumping at the same flow rate as the reflux. The glue coating nozzle 3 sprays the aerogel felt substrate laid on the glue coating line. After the aerogel felt substrate is saturated with glue, the glue coating of the aerogel felt is completed.

[0025] The glue coating and conveying device of the present utility model effectively solves the problems of large flow rate fluctuations caused by pumping, difficult control of the ratio of the sol to the catalyst, resulting in non-gelation or poor gelation effect by adding a reflux branch to the sol and catalyst discharge pipelines and adding a flowmeter to the reflux branch. By observing whether the flowmeter on the reflux branch is stable, it can be judged whether the sol and the catalyst can be connected to the glue coating nozzle 3 (if the flowmeter is stable, it can be connected to the glue coating nozzle 3).

[0026] During specific implementation, the second discharge pipeline 5 is 2 - 3 paths, and the corresponding second reflux branch 7 is also 2 - 3 paths; all the second discharge pipelines 5 are communicated with the first discharge pipeline 4 of the sol tank 1. At the same time, the catalyst tank 2 is connected to the sol discharge pipeline through multiple pipelines, which can effectively increase the contact area between the catalyst and the sol, improve the uniformity of the mixture of the catalyst and the sol, enhance the gelation effect, and thus improve the yield and output of the product.

[0027] During specific implementation, a third valve 8 is provided on the first discharge pipeline 4 between the junction of the first discharge pipeline 4 and the first reflux branch 6 and the sol tank 1, and a fourth valve 10 is provided on the second discharge pipeline 5 between the junction of the second discharge pipeline 5 and the second reflux branch 7 and the catalyst tank 2. In this way, during the hydrolysis of the sol and the reaction of the catalyst, by closing the third valve 8 and the fourth valve 10, the problems that the sol and the catalyst enter the pipeline, resulting in incomplete reaction of some sol and catalyst, and the sol gels prematurely in the pipeline and blocks the pipeline can be avoided.

[0028] During specific implementation, the first discharge pipeline 4 and the second discharge pipeline 5 are joined and then connected to the glue coating nozzle 3, and the connection between the glue coating nozzle 3 and the pipeline is detachable. In this way, if the glue coating nozzle 3 is blocked, it can be removed, cleaned and replaced with a new one, which does not affect continuous production and has a high production efficiency.

[0029] Such as Figure 1 、 Figure 2As shown, in a specific implementation, the glue spray head 3 includes a tower body, a liquid inlet hole 16 is provided on the top of the tower body, and a liquid outlet hole 17 is provided on the bottom; a plurality of tower plates 12 are horizontally staggered in the tower body; one end of the tower plate 12 in the length direction is fixed to the inner wall of the tower body, and the other end is suspended to extend to the middle of the tower body and is slightly larger than the radius or width of the tower body; a liquid guide groove 13 is provided in the middle of the tower plate 12 along the length direction, and a plurality of liquid passing holes 14 are evenly provided on both sides of the width direction of the liquid guide groove 13; the liquid guide grooves 13 on two adjacent tower plates 12 are in the same vertical plane, so that the liquid flows from top to bottom in turn along the direction of the liquid guide grooves 13 of each tower plate 12, that is, the liquid flow rate of the liquid is changed and the length of the path through which the liquid flows is increased through the liquid guide grooves 13 and the liquid passing holes 14 of each tower plate; the liquid inlet hole 16 is provided at one end of the top tower plate 12 close to the inner wall. In this way, the liquid holes 14 on the tower plate 12 allow the liquid to be evenly distributed on the tower plate 12, enhancing the uniformity of the mixing of the catalyst and the sol, thereby enhancing the gel effect. The liquid guide groove 13 set in the middle of the tower plate 12 can increase the liquid flow rate and avoid the problem of premature gelation caused by too long mixing time of the catalyst and the sol. In addition, the parallel and staggered arrangement of the tower plates 12 allows the direction of liquid flow to alternate in different areas of the tower plate 12 while changing the flow rate of the liquid and increasing the length of the path through which the liquid flows. The change in the direction of the liquid helps the liquid cover more surfaces, thereby improving the uniformity of its distribution; the change in speed helps to break up the droplets and increase the surface area of ​​the liquid, thereby improving the uniformity; and the increase in the path length increases the residence time of the liquid on the tower plate 12, thereby improving the mixing effect of the sol and the catalyst.

[0030] In specific implementation, flow meters are provided on the first discharge pipeline 4 and the second discharge pipeline 5. In this way, the flow in the first discharge pipeline 4 and the second discharge pipeline 5 can be monitored. If the flow is unstable, the corresponding valve can be closed immediately to stop the delivery, thereby avoiding affecting the gel effect.

[0031] In specific implementation, the sol tank 1 and the catalyst tank 2 are both provided with stirring paddles 15. Stirring by the stirring paddles 15 can fully hydrolyze the sol and make the catalyst more uniformly configured. In addition, stirring by the stirring paddles 15 is more uniform and labor-saving than manual stirring.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. An aerogel felt glue conveying device, comprising a sol tank and a catalyst tank, wherein the sol tank and the catalyst tank are connected to a glue spray nozzle through a first discharge pipeline and a second discharge pipeline respectively; characterized in that: The sol tank and the catalyst tank are respectively provided with a first reflux branch and a second reflux branch, the first reflux branch is arranged between the first discharge pipeline and the feed inlet of the sol tank, and the second reflux branch is arranged between the second discharge pipeline and the feed inlet of the catalyst tank; a first valve is arranged on the first discharge pipeline between the junction of the first discharge pipeline and the first reflux branch and the glue coating nozzle, and a second valve is arranged on the second discharge pipeline between the junction of the second discharge pipeline and the second reflux branch and the glue coating nozzle; valves and flow meters are arranged on the reflux branches.

2. The aerogel felt gluing and conveying device according to claim 1, characterized in that: The second discharge pipelines are 2 to 3, and the corresponding second reflux branches are also 2 to 3; all the second discharge pipelines are connected to the first discharge pipeline of the sol tank.

3. The aerogel felt gluing and conveying device according to claim 2, characterized in that: A third valve is provided on the first discharge pipeline between the junction of the first discharge pipeline and the first reflux branch and the sol tank, and a fourth valve is provided on the second discharge pipeline between the junction of the second discharge pipeline and the second reflux branch and the catalyst tank.

4. The aerogel felt gluing and conveying device according to claim 2, characterized in that: The first discharge pipeline and the second discharge pipeline are connected to the glue spray head after merging, and the glue spray head and the pipeline are detachably connected.

5. The aerogel felt gluing and conveying device according to claim 4, characterized in that: The glue coating nozzle includes a tower body, with a liquid inlet hole on the top and a liquid outlet hole on the bottom; multiple layers of tower plates are horizontally staggered in the tower body; one end of the tower plate in the length direction is fixed to the inner wall of the tower body, and the other end is suspended to the middle of the tower body and is slightly larger than the radius or width of the tower body; a liquid guide groove is arranged in the middle of the tower plate along the length direction, and a number of liquid passing holes are evenly arranged on both sides of the width direction of the liquid guide groove; the liquid guide grooves on two adjacent tower plates are in the same vertical plane, so that the liquid flows from top to bottom in turn along the direction of the liquid guide grooves of each layer of tower plates, that is, the flow rate of the liquid is changed and the length of the path through which the liquid flows is increased through the liquid guide grooves and liquid passing holes of each layer of tower plates; the liquid inlet hole is arranged at one end of the top tower plate close to the inner wall.

6. The aerogel felt gluing and conveying device according to claim 1, characterized in that: The first discharge pipeline and the second discharge pipeline are both provided with flow meters.

7. The aerogel felt gluing and conveying device according to claim 1, characterized in that: The sol tank and the catalyst tank are both provided with stirring paddles.

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