Light heat insulation straw wall brick and production process thereof

Abstract

The invention discloses a light heat insulation straw wall brick in the technical field of buildings. The light heat insulation straw wall brick sequentially comprises a waterproof layer, a connecting layer, a solid layer and a plurality of heat insulation layers from outside to inside. The waterproof layer is made of aerogel, the connecting layer is made of foamed ceramic, the solid layer is made of straw, and the heat insulation layer is made of vacuum heat insulation materials. The production process of the light heat-insulating straw wall brick comprises the following steps: step 1, screening crushed materials; 2, drying the raw materials; step 3, adding materials and stirring: adding an adhesive and an additive and stirring; step 4, rolling in a mold: rolling to obtain a straw homogeneous plate and a wavy vacuum thermal insulation material; step 5, surface finishing; sixthly, layer-by-layer installation is conducted; and 7, 3D printing is conducted, specifically, a waterproof layer is subjected to 3D printing on the surface of the wall. The heat insulation effect is improved through the vacuum heat insulation material; the weight of the wall body is reduced through the straw homogenizing plate made of straw; the heat insulation effect of the wall body is improved through the porous structure of the aerogel and the foamed ceramic, the weight of the wall body is reduced, and therefore the light-weight characteristic of the wall body is highlighted.

Description

Technical Field

[0001] The invention belongs to the technical field of construction, in particular to a lightweight heat-insulating straw wall brick and a production process thereof. Background Art

[0002] When used as a building material, straw will not cause any pollution to the environment, nor will it produce toxic or harmful hazards. It can be said to be the most ideal building material that can meet people's psychological needs to return to nature and the concept of low-carbon, environmentally friendly and sustainable development.

[0003] Most of the existing walls are concrete walls, which are heavy. In addition, since the main components of concrete walls are cement, sand and aggregate, the thermal conductivity of these materials is relatively high, and thus the thermal insulation is poor. Therefore, it is necessary to propose lightweight insulating straw wall bricks and their production process. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to propose lightweight insulating straw wall bricks and their production process, to improve the insulation effect through vacuum insulation materials; to reduce the weight of the wall through straw homogeneous boards made of straw; to improve the insulation effect of the wall and reduce the weight of the wall through the porous structure of aerogel and foam ceramics, thereby highlighting the lightweight characteristics of the wall.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a lightweight heat-insulating straw wall brick comprises, from the outside to the inside, a waterproof layer, a connecting layer, a solid layer and a plurality of heat-insulating layers; the waterproof layer is fixedly connected to the connecting layer, the connecting layer is fixedly connected to the solid layer, the solid layer and the heat-insulating layer adjacent thereto are fixedly connected, and adjacent heat-insulating layers are fixedly connected to each other, and the shape of the heat-insulating layers is wavy; the material of the waterproof layer is aerogel, the material of the connecting layer is foam ceramic, the material of the solid layer is straw, and the material of the heat-insulating layer is vacuum insulation material.

[0006] The following principles and beneficial effects are achieved by adopting the above scheme:

[0007] Basic principle: Aerogel is hydrophobic and has excellent waterproof ability; foam ceramics have the characteristics of high strength and low density, and because foam ceramics have thermal insulation ability, the thermal insulation performance of lightweight insulating straw wall bricks is further improved; straw homogeneous board has good physical and mechanical properties and waterproof properties; vacuum insulation material, as a high-efficiency thermal insulation material, has good thermal insulation, physical and chemical properties, and also has good fire resistance. The design of vacuum insulation material ensures the safety of lightweight insulating straw wall bricks.

[0008] Beneficial effects: 1. The present invention improves the thermal insulation effect through vacuum insulation materials; reduces the weight of the wall through straw homogenized boards; improves the thermal insulation effect of the wall through the porous structure of aerogel and foam ceramics, while reducing the weight of the wall, thereby highlighting the lightweight characteristics of the wall.

[0009] 2. The design of the waterproof layer prevents water from entering the wall and causing it to become damp when it comes into contact with water, thereby increasing the service life of the wall.

[0010] 3. The design of the connecting layer enables the walls to be connected to each other, which can greatly shorten the construction period and reduce labor costs during the construction process.

[0011] 4. The design of several wavy insulation layers further enhances the insulation effect of the wall, and the wavy design increases the contact surface between the insulation layers, so that each insulation layer is heated evenly, thereby better blocking heat.

[0012] 5. The design of using foam ceramics as the connecting layer fully utilizes the high strength of foam ceramics. At the same time, due to the porous structure of foam ceramics, it has a certain sound absorption effect, which makes the lightweight insulating straw wall brick have a certain sound absorption function.

[0013] 6. The design of placing aerogel in the outermost layer of the lightweight thermal insulation straw wall brick fully utilizes the hydrophobicity and fire resistance of aerogel, provides protection for the lightweight thermal insulation straw wall brick, and increases the service life of the lightweight thermal insulation straw wall brick.

[0014] Furthermore, a plurality of through holes and a plurality of channels are opened on the thermal insulation layer, and the through holes and the channels are spaced apart from each other from top to bottom. The channels are filled with helium, the through holes are filled with argon, and a plurality of blocking members of different sizes are fixedly connected to the through holes.

[0015] Beneficial effects: Argon has excellent thermal insulation performance, its density and dynamic viscosity are higher than air, and its thermal conductivity and specific heat capacity are lower than air, so that argon can effectively slow down heat convection and heat conduction. At the same time, the blocking member inside the through hole can further block the flow of argon, thereby further slowing down the flow of argon and further improving the thermal insulation performance of argon. The air density of helium is smaller than that of air, which can provide a certain lifting force for lightweight thermal insulation straw wall bricks, thereby realizing the lightweight of lightweight thermal insulation straw wall bricks.

[0016] Furthermore, a plurality of connecting members are fixedly connected to one side of the connecting layer, and a plurality of connecting holes corresponding to the connecting members are opened on a side of the connecting layer away from the connecting members, and the connecting holes are connected to the outside.

[0017] Beneficial effects: The design of the connectors and the connection holes realizes the modularization of lightweight heat-insulating straw wall bricks. Compared with the traditional construction method, the modular construction method greatly reduces the workload of on-site work, thereby shortening the construction period.

[0018] Furthermore, the production process of lightweight heat-insulating straw wall bricks comprises the following steps:

[0019] Step 1: screening of broken materials: crushing the selected straw and screening the straw;

[0020] Step 2, raw material drying: drying the screened straw;

[0021] Step 3, adding materials and stirring: adding adhesives and additives to the dried straw raw materials and stirring them thoroughly;

[0022] Step 4: rolling into a mold: pouring the straw after adding the adhesive and additive into a homogeneous board mold, and rolling the straw to obtain a straw homogeneous board; placing a plurality of vacuum insulation materials into the insulation board mold and pressing them into a wavy shape, opening a plurality of through holes and a plurality of channels on the surface of the vacuum insulation materials, and fixing a plurality of blocking members inside each through hole;

[0023] Step 5, surface finishing: grinding and finishing the surface of the straw homogenizing plate;

[0024] Step 6: Install layer by layer: install the foam ceramic on the surface of the straw homogenized board, install the vacuum insulation material into the straw homogenized board, and fill each through hole with argon gas to seal it, and fill each channel with helium gas to seal it;

[0025] Step seven, 3D printing: Use 3D printing technology to print a waterproof layer on the surface of the foam ceramic.

[0026] Furthermore, in step one, when screening the straw, straw particles with a diameter greater than 10 mm are removed, and straw particles of uniform size are retained.

[0027] Furthermore, in step 2, when drying the straw, the moisture content of the straw is controlled between 6% and 8%.

[0028] Furthermore, in step three, the adhesive is a polymerized isocyanate adhesive.

[0029] Furthermore, in step three, the additive is a flame retardant.

[0030] Furthermore, in step five, when grinding the straw homogenizing plate, it is firstly subjected to rough grinding and then subjected to fine grinding.

[0031] Furthermore, in step six, when the through holes and channels are sealed, aerogel is used as the sealing material.

[0032] Beneficial effects: 1. Selecting straw particles of uniform size can ensure a more uniform distribution of density and strength of the board, thereby improving the physical properties of the overall product. At the same time, the consistent size of straw particles helps to reduce uneven phenomena in the production process, such as voids, cracks, etc., thereby improving the yield and quality stability of lightweight insulating straw wall bricks.

[0033] 2. When drying the straw, the moisture content of the straw is controlled between 6% and 8%, so that the moisture content of the straw is low. Since the straw with low moisture content is more stable during the processing and is not easy to deform or expand, the dimensional stability and shape accuracy of the straw homogenized board are improved.

[0034] 3. Compared with traditional adhesives such as urea-formaldehyde resin, polymerized isocyanate adhesives produce fewer pollutants during production and use. At the same time, polymerized isocyanate adhesives have good flame retardancy and water resistance, which improves the safety of lightweight insulating straw wall bricks.

[0035] 4. The addition of flame retardants further improves the safety of lightweight insulating straw wall bricks.

[0036] 5. After the rough and then fine grinding process, the surface quality of the straw homogenizer is significantly improved, reducing the difficulty of subsequent processing of the straw homogenizer.

[0037] 6. The through-hole design effectively reduces the weight of the lightweight heat-insulating straw wall bricks, thereby highlighting the lightweight of the wall.

[0038] 7. The wavy vacuum insulation material can increase the contact surface between the vacuum insulation materials, thereby making the heat conduction area larger. At the same time, the wavy design increases the relative thickness of the vacuum insulation material, thereby enhancing the insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic isometric diagram of an embodiment of the present invention.

[0040] Figure 2 It is a top view and cross-sectional schematic diagram of a lightweight heat-insulating straw wall brick in an embodiment of the present invention.

[0041] Figure 3 It is a side cross-sectional schematic diagram of a lightweight heat-insulating straw wall brick in an embodiment of the present invention.

[0042] Figure 4 Schematic diagram of a flow chart of an embodiment of the present invention.

[0043] The reference numerals in the drawings of the specification include: waterproof layer 1, connecting layer 2, solid layer 3, thermal insulation layer 4, through hole 5, blocking member 6, connecting member 7, connecting hole 8, channel 9. DETAILED DESCRIPTION

[0044] The following is further described in detail through specific implementation methods:

[0045] Embodiment 1:

[0046] Basically as attached Figure 1 , Figure 2 , Figure 3 As shown:

[0047] The lightweight heat-insulating straw wall brick comprises, from outside to inside, a waterproof layer 1, a connecting layer 2, a solid layer 3 and a plurality of heat-insulating layers 4; the waterproof layer 1 and the connecting layer 2 are bonded to each other, the connecting layer 2 and the solid layer 3 are bonded to each other, the solid layer 3 and the heat-insulating layer 4 adjacent thereto are bonded to each other, adjacent heat-insulating layers 4 are integrally formed, and the shape of the heat-insulating layers 4 is wavy.

[0048] The waterproof layer 1 is made of aerogel, the connection layer 2 is made of foam ceramics, the solid layer 3 is made of straw, the insulation layer 4 is made of vacuum insulation material, and the vacuum insulation material in this embodiment is vacuum glass.

[0049] A plurality of through holes 5 and channels 9 are provided on the thermal insulation layer 4, and the through holes 5 and channels 9 are spaced apart from each other from top to bottom. The interior of the channels 9 is filled with helium, and the interior of the through holes 5 is filled with argon. A plurality of blocking members 6 of different sizes are bonded to the interior of the through holes 5. A plurality of connecting members 7 are integrally formed on one side of the connecting layer 2, and a plurality of connecting holes 8 corresponding to the connecting members 7 are provided on the side of the connecting layer 2 away from the connecting members 7, and the connecting holes 8 are connected to the outside.

[0050] The specific implementation process is as follows: when argon flows inside the through hole 5, the blocking members 6 of different sizes can play a certain blocking role on the argon, thereby slowing down the flow speed of the argon, slowing down the heat convection, and increasing the thermal insulation performance. At the same time, the design of the blocking members 6 of different sizes makes the argon gas have different blocking effects when flowing in the through hole 5. At this time, due to the different cross-sectional sizes inside the through hole 5, the argon flow rate between different blocking members 6 will also be different. The argon gas with a fast flow rate will drive the argon gas with a slow flow rate to move together, so that the argon gas can be evenly distributed inside the through hole 5, reducing the possibility of some argon gas forming a dead zone in the through hole 5.

[0051] When the lightweight heat-insulating straw wall bricks are manufactured, the construction workers can connect the lightweight heat-insulating straw wall bricks to each other through the connecting pieces 7 and the connecting holes 8 on another lightweight heat-insulating straw wall brick, which shortens the construction period and reduces the labor cost.

[0052] When it rains, due to the good hydrophobicity of aerogel, rainwater will not enter the interior of the lightweight insulating straw wall bricks, thereby protecting the lightweight insulating straw wall bricks and increasing their service life.

[0053] When encountering hot weather, since aerogel, foam ceramics, vacuum glass and argon gas all have good thermal insulation properties, the temperature fluctuation inside the lightweight insulating straw wall bricks is small, thereby reducing the operating time and load of the air-conditioning and heating systems, achieving energy conservation and emission reduction and alleviating energy pressure.

[0054] Embodiment 2:

[0055] Basically as attached Figure 4 As shown:

[0056] The difference from the above embodiment is that the lightweight heat-insulating straw wall brick production process comprises the following steps:

[0057] Step 1: screening of crushed materials: crush the selected straw, screen the straw, remove straw particles with a diameter greater than 10 mm, and retain straw particles of uniform size.

[0058] Step 2: Drying the raw materials: Dry the screened straws to control the moisture content of the straws at 7%.

[0059] Step three, adding materials and stirring: adding adhesive and additives to the dried straw raw material and stirring them fully, wherein the adhesive is selected as polymerized isocyanate adhesive and the additive is selected as flame retardant.

[0060] Step 4: rolling into mold: pour the straw with adhesive and additives into the homogeneous board mold, and roll the straw to make a straw homogeneous board; put a number of vacuum glasses into the insulation board mold and press them into a wavy shape, open a number of through holes 5 and a number of channels 9 on the surface of the vacuum glass, and glue a number of blocking parts 6 inside each through hole 5.

[0061] Step 5, surface finishing: The surface of the straw homogenizing board is polished and finished by first rough polishing and then fine polishing.

[0062] Step six, install layer by layer: install the foam ceramic on the surface of the straw homogenization board, install the vacuum glass into the straw homogenization board, and fill each through hole 5 with argon gas to seal, and fill each channel 9 with helium gas to seal, and the sealing material is aerogel.

[0063] Step seven, 3D printing: using 3D printing technology to print a waterproof layer 1 on the surface of the foam ceramic.

[0064] The specific implementation process is as follows: the staff first crushes the straw and sieves the straw particles through a sieve plate. After removing the straw particles with a diameter greater than 10 mm, straw particles of uniform size are selected.

[0065] After the selection is completed, the staff will put the straw pellets into the dryer for drying, and control the moisture content of the straw pellets at 7%. After the drying is completed, the staff will add polymerized isocyanate adhesive and flame retardant to the dried straw pellets, and put the mixture of straw pellets, polymerized isocyanate adhesive and flame retardant into the mixer and stir for 10 minutes.

[0066] After the stirring is completed, the staff puts the mixture of straw particles, polyisocyanate adhesive and flame retardant into the homogenized board mold, and rolls the mixture in the mold through a rolling machine to obtain a straw homogenized board as the solid layer 3. After the solid layer 3 is obtained, the staff puts six pieces of vacuum glass into the insulation board mold, and operates the rolling machine to roll it to obtain a wavy insulation layer 4. After obtaining the wavy insulation layer 4, the staff opens a number of through holes 5 and a number of channels 9 on the insulation layer 4, and bonds the blocking member 6 to the inside of the through hole 5, while injecting argon into the through hole 5 and helium into the channel 9, and uses aerogel to seal the through hole 5 and the channel 9. At this time, since the insulation layer 4 is wavy, the contact area between the solid layer 3 and the insulation layer 4, and between adjacent insulation layers 4 increases, and the insulation area during the heat transfer process increases, thereby enhancing the insulation efficiency. At the same time, since the insulation layer 4 is wavy, the relative thickness of the insulation layer 4 increases, thereby increasing the length of the through hole 5. At this time, the contact surface between the argon gas and the through hole 5 increases, thereby further increasing the insulation area and further enhancing the insulation efficiency. The design of the through hole 8 and the channel 9 reduces the weight of the lightweight insulation straw wall brick and has the characteristics of lightness. At the same time, since the density of helium is lower than that of air, helium will gather above the channel 9, generating a lifting force on the lightweight insulation straw wall brick, thereby making the lightweight insulation straw wall brick even lighter.

[0067] The staff took out the solid layer 3 and used a wall grinder and 50-grit sandpaper to rough-grind it for 20 minutes, and then used a right-angle sandpaper stand and 180-grit sandpaper to fine-grind it for 30 minutes until the surface was smooth.

[0068] The staff placed the wavy insulation layer 4 into the solid layer 3 and bonded it firmly, and took out the foam ceramic as the connecting layer 2 and bonded it to the surface of the solid layer 3. Finally, aerogel was used as the consumable material for 3D printing, and the waterproof layer 1 was printed on the surface of the foam ceramic using 3D printing technology to complete the preparation of the lightweight insulating straw wall bricks.

[0069] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Lightweight heat-insulating straw wall brick, characterized by: From the outside to the inside, it includes a waterproof layer, a connecting layer, a solid layer and several thermal insulation layers; the waterproof layer is fixedly connected to the connecting layer, the connecting layer is fixedly connected to the solid layer, the solid layer and the adjacent thermal insulation layer are fixedly connected, and adjacent thermal insulation layers are fixedly connected to each other, and the shape of the thermal insulation layers is wavy; the material of the waterproof layer is aerogel, the material of the connecting layer is foam ceramic, the material of the solid layer is straw, and the material of the thermal insulation layer is vacuum insulation material.

2. The lightweight heat-insulating straw wall brick according to claim 1, characterized in that: The thermal insulation layer is provided with a plurality of through holes and a plurality of channels, which are spaced from top to bottom. The channels are filled with helium, the through holes are filled with argon, and the through holes are fixedly connected with a plurality of blocking members of different sizes.

3. The lightweight heat-insulating straw wall brick according to claim 2 is characterized in that: One side of the connection layer is fixedly connected with a plurality of connection pieces, and a side of the connection layer away from the connection pieces is provided with a plurality of connection holes corresponding to the connection pieces, and the connection holes are communicated with the outside.

4. A production process for lightweight heat-insulating straw wall bricks, characterized in that: The following steps are involved: Step 1: screening of broken materials: crushing the selected straw and screening the straw; Step 2, raw material drying: drying the screened straw; Step 3, adding materials and stirring: adding adhesives and additives to the dried straw raw materials and stirring them thoroughly; Step 4: rolling into a mold: pouring the straw after adding the adhesive and additive into a homogeneous board mold, and rolling the straw to obtain a straw homogeneous board; placing a plurality of vacuum insulation materials into the insulation board mold and pressing them into a wavy shape, opening a plurality of through holes and a plurality of channels on the surface of the vacuum insulation materials, and fixing a plurality of blocking members inside each through hole; Step 5, surface finishing: grinding and finishing the surface of the straw homogenizing plate; Step 6: Install layer by layer: install the foam ceramic on the surface of the straw homogenized board, install the vacuum insulation material into the straw homogenized board, and fill each through hole with argon gas to seal it, and fill each channel with helium gas to seal it; Step seven, 3D printing: Use 3D printing technology to print a waterproof layer on the surface of the foam ceramic.

5. The production process of lightweight heat-insulating straw wall bricks according to claim 4, characterized in that: In step 1, when screening the straw, remove straw particles with a diameter greater than 10 mm and retain straw particles of uniform size.

6. The production process of lightweight heat-insulating straw wall bricks according to claim 5, characterized in that: In step 2, when drying the straw, the moisture content of the straw is controlled between 6% and 8%.

7. The production process of lightweight heat-insulating straw wall bricks according to claim 6, characterized in that: In step three, the adhesive is a polymerized isocyanate adhesive.

8. The production process of lightweight heat-insulating straw wall bricks according to claim 7, characterized in that: In step three, the additive is a flame retardant.

9. The production process of lightweight heat-insulating straw wall bricks according to claim 8, characterized in that: In step five, when grinding the straw homogenizing plate, first perform rough grinding on it and then perform fine grinding on it.

10. The production process of lightweight heat-insulating straw wall bricks according to claim 9, characterized in that: In step six, when the through holes and channels are sealed, aerogel is used as the sealing material.

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