CN111075105A - Assembled type ultra-low energy consumption building outer wall panel structure and manufacturing method - Google Patents
Assembled type ultra-low energy consumption building outer wall panel structure and manufacturing method Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
Abstract
The invention relates to an assembled type ultra-low energy consumption building outer wall panel structure.A sandwich heat-insulating layer consists of a vacuum heat-insulating panel group at the center and a group of polyurethane panels and is provided with a through hole for a connecting piece to pass through, and auxiliary ribs are filled in the inner wall of the through hole. The connecting piece passes through the auxiliary rib, and one end is connected with the outer blade plate, and the other end is connected with the inner blade plate. The side wall of the sandwich heat-insulating layer is coated with auxiliary ribs to protect the sandwich heat-insulating layer from being damaged during transportation and wall installation. And the manufacturing method comprises the following steps: and obtaining the auxiliary rib ratio after obtaining the external wall main body heat transfer coefficient which enables the average heat transfer coefficient of the whole external wall of the external wall panel not to be larger than the standard value. And obtaining the thickness of the vacuum heat insulation plate according to the heat transfer coefficient of the main section of the structure. The advantages are that: the heat transfer coefficient of the whole wall is reduced by changing the material and the composition mode of the heat-insulating sandwich layer. The problem of heat loss caused by a heat bridge at the connecting part of the inner blade plate and the outer blade plate is solved. The polyurethane plates are tightly attached to the inner leaf plate and the outer leaf plate on two sides of the vacuum heat insulation plate, so that the vacuum heat insulation plate is prevented from being damaged. The auxiliary ribs in the through holes prevent the connecting pieces from damaging the vacuum insulation panels when being installed.
Description
Technical Field
The invention relates to the field of building external wall panel manufacturing, in particular to an assembled type ultra-low energy consumption building external wall panel structure and a manufacturing method thereof.
Background
The fabricated building is beneficial to saving resources and energy and reducing construction pollution, and plays a significant role in dealing with global climate problems. The ultra-low energy consumption building is a novel low energy consumption building which is easy to popularize, and has good heat preservation performance and air tightness and is provided on the basis of the development of zero energy consumption buildings and passive buildings at home and abroad. At present, a large number of fabricated buildings and ultra-low energy consumption buildings are built at home and abroad, relatively complete technical systems are formed in the two fields, but the technology for forming the fabricated ultra-low energy consumption building by combining the two technical systems is not complete, and the difficulty is mainly focused on the design of the external wall board.
The Vacuum Insulation Panel (VIP Panel) is one of Vacuum Insulation materials, is formed by compounding a filling core material and a Vacuum protection surface layer, effectively avoids heat transfer caused by air convection, can greatly reduce the heat conductivity coefficient to 0.008W/((square meter. k)) or even lower, does not contain any Ozone Depletion Substances (ODS), has the characteristics of environmental protection, high efficiency and energy saving, and is the most advanced high-efficiency Insulation material in the world at present. The vacuum insulation panel can ensure excellent heat conductivity coefficient only under vacuum state, and if the vacuum protection surface layer is damaged, the heat insulation performance is greatly reduced.
According to technical code of prefabricated concrete structures (JGJ1-2014) article 8.2.6: when the prefabricated external wall adopts the sandwich wall board, the following requirements are met: 1, the thickness of the outer leaf wallboard is not less than 50mm, and the outer leaf wallboard is reliably connected with the inner leaf wallboard; 2, the thickness of the interlayer of the sandwich external wall panel is not more than 120 mm; 3 when the inner leaf wall plate is used as a bearing wall, the inner leaf wall plate is designed according to a shear wall. Thus, for prefabricated sandwich wall panels, the thickness of the sandwich layer cannot be greater than 120 mm.
Therefore, in the prior art, the sandwich heat-insulating layer with the thickness of 90mm is usually adopted to achieve the purposes of heat preservation and air tightness. The insulating layer consists of 3 vacuum insulation panels with the thickness of 30 mm. Namely, the wall plates are sequentially from the outdoor to the indoor: 60mm thick outer leaf plates (reinforced concrete), 30mm thick vacuum insulation panels, 200mm thick inner leaf plates (reinforced concrete). The prior art provides an exterior wall sandwich panel with a front view as shown in fig. 1. The heat preservation reserves the installation space of prefabricated wallboard inside and outside page or leaf connecting piece (and connecting piece), and the effect of interior lamina membranacea and outer lamina membranacea of tie can only be realized to the connecting piece all need pierce through the sandwich heat preservation, and this gap diameter is greater than the diameter of connecting piece, can produce the gap with above-mentioned sandwich heat preservation when the connecting piece passes above-mentioned space to lead to the production of heat bridge, lead to the rising of outer wall heat transfer coefficient, easily cause indoor cold volume to run off summer, easily produce indoor heat and run off winter.
In an actual living situation, a resident may maintain the indoor temperature within a comfortable range (26 ℃ in summer, 20 ℃ in winter) by lowering the temperature of the air conditioner or raising the temperature of heating, resulting in a problem of increased energy consumption.
However, the prior art has the following problems. 1) The exposed part of the vacuum insulation panel at the panel edge has no any protection measure, and the vacuum protection surface layer is extremely easy to damage at the edge of figure 1 in the processes of production, construction and transportation. 2) The conventional scheme in the prior art does not consider the heat loss caused by a heat bridge at the connecting part of the inner and outer blades of the prefabricated wall board, and the connecting part shown in figure 1 has a gap with the heat insulation layer structure. 3) The vacuum insulation panels adopted in the existing scheme are all special-shaped plates, and as shown in figure 1, each vacuum insulation panel is in an irregular shape in order to reserve a connecting piece space, and is not convenient for large-scale mechanical production, so that the manufacturing cost of the vacuum insulation panels is far higher than that of rectangular plates.
How to protect the edge of the vacuum heat insulation plate in the construction process, slow down the heat loss caused by the heat bridge at the connecting part of the inner blade plate and the outer blade plate, and how to improve the productivity deficiency caused by the abnormal shape of the vacuum heat insulation plate used in the prior art becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an assembled type ultra-low energy consumption building outer wall panel structure and a manufacturing method thereof, which are used for solving the problems that the edge of a vacuum heat insulation panel cannot be protected, the heat loss is caused by a heat bridge at a connecting part of an inner blade plate and an outer blade plate, and the productivity of the vacuum heat insulation panel is improved in the prior art.
In order to achieve the above object, the present invention provides an assembled ultra-low energy consumption building external wall panel structure, which comprises: the inner leaf plate, the outer leaf plate, the sandwich insulating layer and the connecting piece; the sandwich insulating layer is formed by mutually laminating a vacuum heat insulation plate group at the center and a group of polyurethane plates; at least one group of through holes for the connecting pieces to pass through are formed on the sandwich insulating layer; the inner of each through hole is filled with the auxiliary rib; auxiliary ribs are wrapped around the sandwich insulating layer; the connecting piece passes through the auxiliary rib of the through hole on the sandwich insulation layer, one end of the connecting piece is connected with the outer blade plate, and the other end is connected with the inner blade plate.
Preferably, in the above technical solution, one of the vacuum insulation panels in the vacuum insulation panel group has a thickness of 40 mm.
Preferably, one of the polyurethane plates in the polyurethane plate set has a thickness of 20 mm.
Preferably, in the above aspect, the cross-sectional area of the auxiliary rib is larger than the cross-sectional area of the connecting member at the perforation.
In order to realize the technical purpose of the invention, the invention also provides a manufacturing method of the assembled type ultra-low energy consumption building external wall panel, which comprises the following steps: obtaining the average heat transfer coefficient U of the whole external wall panelmHeat transfer coefficient U of external wall main body not greater than standard valuep. According to the heat transfer coefficient U of the outer wall main bodypAnd obtaining the thermal resistances of the polyurethane and the vacuum insulation board at different sections. And obtaining the thickness of the vacuum heat insulation plate and the thickness of the polyurethane plate according to the thermal resistances of the polyurethane and the vacuum heat insulation plate at different sections.
Preferably, in the above technical solution, the ratio a of the cross section of the vacuum insulation panel is greater than the ratio b of the cross section of the auxiliary rib filled in the through hole and the cross section of the polyurethane rib coated around the sandwich insulation layer.
Preferably, the position of the auxiliary rib is determined according to the position of the connector on the building outer wall panel.
Preferably, as a preference of the above technical solution, the thickness of the polyurethane plate is obtained according to the heat transfer coefficient of the main section of the structure.
Preferably, the connecting member penetrates the auxiliary rib to fix the sandwiched heat-insulating layer composed of the vacuum heat-insulating plate and the polyurethane plate between the inner leaf plate and the outer leaf plate.
Preferably, the sandwich insulation layer is formed by bonding a plurality of vacuum insulation panels and a plurality of polyurethane panels.
The technical scheme of the invention provides an assembled type ultra-low energy consumption building outer wall plate structure which is a sandwich insulation layer formed by mutually laminating a vacuum insulation plate group and a group of polyurethane plates in the center, wherein at least one group of through holes for the connecting pieces to pass through are formed in the sandwich insulation layer. Auxiliary ribs are filled in the through holes, and the edges of the sandwich heat-insulating layer are wrapped with the auxiliary ribs. The connecting piece passes through the auxiliary rib in the through hole on the sandwich insulation layer, one end of the connecting piece is connected with the outer blade plate, and the other end of the connecting piece is connected with the inner blade plate. The technical scheme of the invention also provides a manufacturing method of the assembled type ultra-low energy consumption building external wall panel, which comprises the following steps: and after the heat transfer coefficient of the outer wall main body which can enable the average heat transfer coefficient of the whole wall of the outer wall panel to be not more than the standard value is obtained, the heat resistances of the polyurethane and the vacuum insulation panel at different sections are obtained according to the heat transfer coefficient of the outer wall main body. And obtaining the thickness of the vacuum heat insulation plate and the thickness of the polyurethane plate according to the thermal resistances of the polyurethane and the vacuum heat insulation plate at different sections.
The invention has the advantages that the heat transfer coefficient of the whole wall is reduced by changing the material and the composition mode of the sandwich heat-insulating layer under the condition of ensuring that the thickness of the heat-insulating sandwich layer is within 120 mm. The sandwich insulation layer consists of a polyurethane layer and a vacuum insulation board layer. The polyurethane layers are distributed on two sides as protective layers and are tightly attached to the inner leaf plates and the outer leaf plates, so that the damage to the vacuum insulation plate in the production and transportation processes of the prefabricated sandwich outer wall panel is prevented. In addition, perforations are arranged between the vacuum heat insulation plates, auxiliary ribs are filled in the perforations, and the auxiliary ribs have the same thickness as the vacuum heat insulation plates. The position of the perforation is designed according to the distribution diagram of the connector provided by a component factory, and the aim is to fix the vacuum insulation panel; the vacuum insulation panel is prevented from being damaged when the connecting piece is installed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a top view of a prior art vacuum insulation panel.
Fig. 2 is a schematic structural diagram of an assembled ultra-low energy consumption building external wall panel according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a sandwich insulation layer using a halfen connector according to an embodiment of the present invention.
Fig. 4 is a sectional view taken along a-a direction in fig. 3.
Fig. 5 is a right side view of fig. 3.
Fig. 6 is a flowchart of a method for manufacturing an ultra-low energy consumption building external wall panel according to an embodiment of the present invention.
FIG. 7 is a top view of a sandwich insulation layer using Thermomass connectors according to an embodiment of the present invention.
Fig. 8 is a partially enlarged view of fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the embodiments provided in the present invention, the auxiliary rib is specifically described by taking a polyurethane rib as an example, but not limited thereto. The auxiliary rib material includes but is not limited to: extruded polystyrene, graphite polystyrene board.
Firstly, the structure of the assembled type ultra-low energy consumption building external wall panel provided by the invention is explained, fig. 2 is a system structure diagram of the assembled type ultra-low energy consumption building external wall panel provided by the invention, and as shown in fig. 2, a vacuum insulation panel 1 with the thickness of 40mm in a vacuum insulation panel group and a vacuum insulation panel 2 are mutually attached. The polyurethane boards 3 and 4 having a thickness of 20mm in the polyurethane board group are respectively attached to both sides of the vacuum insulation board group. Thus, a polyurethane plate 3 with a thickness of 20mm, a vacuum insulation panel 1 with a thickness of 40mm, a vacuum insulation panel 2 with a thickness of 40mm and a polyurethane plate 4 with a thickness of 20mm are arranged in sequence from the outdoor side to the indoor side in the figure, thereby forming a sandwich insulation layer 7 with a thickness of 120 mm.
Further, as shown in fig. 2, both ends of a sandwich insulation layer 7 composed of a vacuum insulation panel 1, a vacuum insulation panel 2, a polyurethane plate 3 and a polyurethane plate 4 are covered with auxiliary ribs 5 having the same thickness as the sandwich insulation layer 7.
Referring to fig. 3 to 5, fig. 3 is a schematic structural view of a sandwich insulation layer using a halfen connector according to an embodiment of the present invention. As shown in figure 3, the sandwich insulation layer is provided with a through hole which can allow the connecting piece 6 to pass through. In the figure, the shadow part is the area occupied by the perforated part on the sandwich insulation layer and the auxiliary rib 5 coated around the sandwich insulation layer. As shown in fig. 3, the cross-sectional area of the auxiliary rib 5 is larger than that of the connecting piece 6, when the connecting piece 6 passes through the through hole, the auxiliary rib 5 can surround the connecting piece 6 so that the connecting piece 6 is not in direct contact with the sandwiched heat-insulating layer, the protection effect on the vacuum heat-insulating plate in the sandwiched heat-insulating layer is achieved, the material loss is reduced, and the construction cost is saved.
One end of the connecting piece 6 is connected with the outer blade plate after penetrating through the through hole, the other end of the connecting piece is connected with the inner blade plate, and when the connecting piece is used, the outer blade plate and the inner blade plate are respectively fixed at preset positions, which is not described again in the prior art.
The manufacturing method of the assembled type ultra-low energy consumption building external wall panel provided by the invention is explained, and specifically comprises the following steps:
the production process flow comprises the following steps: 1) cleaning a mold table → 2) spraying, drawing a line → 3) assembling an outer blade plate template, installing a reinforcement cage → 4) installing a connecting piece → 5) pouring once, vibrating outer blade plate concrete → 6) assembling an inner blade plate template, installing a heat insulation plate → 7) installing inner blade plate reinforcement → 8) fixing the connecting piece and the inner blade plate reinforcement → 9) installing and reserving, embedding part → 10) pouring twice, scraping and vibrating inner blade plate concrete → 11) pre-curing a component, finishing the plate surface → 12) maintaining the component → 13) disassembling the mold, taking up, cleaning, repairing and the like. (PPT20-32 page)
The thickening step of the production process flow is different from the step of the traditional prefabricated sandwich wallboard.
Specifically, UmFor the average heat transfer coefficient of the whole wall of the external wall panel [ W/(+) square meter K)]，UpThe average heat transfer coefficient of the whole wall (main body part) when no point heat bridge or line heat bridge is considered for the external wall [ W/(. square meter. K)]。
Wherein Ψ: averaging the linear heat bridge values at the horizontal seams and the vertical seams of each wallboard per square meter; x: averaging the point thermal bridge values at each square meter of wallboard connector for each wallboard; fp: the area of the main part of the exterior wall (square meter); fB1、FB2: the number of thermal bridges at the outer wall connecting piece; l isC1、LC2: length of thermal bridge of outer wall perimeter line. In actual construction, the parameters can be directly obtained from drawings and construction standardsAnd (6) obtaining. The values of X and Ψ can be obtained by thermal bridge simulation software.
The ratio b of the cross-sectional area of the auxiliary rib is mainly determined by the distribution of the connecting pieces, and the ratio a of the cross-sectional area of the vacuum heat-insulating plate surface is Fp-b。Fp: the area of the main part of the external wall is square meter. Wherein the auxiliary rib cross-sectional area b is a cross-sectional area of the polyurethane sheet.
The thermal resistance of the same material is different due to different thicknesses. Taking the invention as an example, the section of the wallboard has two composition forms, one is 60mm reinforced concrete outer blade plate +20mm polyurethane plate +40mm vacuum insulation plate +20mm polyurethane plate +200mm inner blade plate; the other is 60mm reinforced concrete outer blade plate +20mm polyurethane auxiliary rib +80mm polyurethane auxiliary rib +20mm polyurethane auxiliary rib +200mm inner blade plate. Thus this step requires the determination of RPolyurethane 20、RPolyurethane 80、RPolyurethane 120And RVacuum heat insulation plate。
UP＝(UParallel Path parallel route+UIsothermal Planes isothermal surface)/2 (2)
Wherein, R: the thermal resistance (square meter. K/W) of each material layer; a: the main section of the vacuum insulation plate accounts for the ratio; b: the auxiliary rib main section is in proportion. Rsi: heat transfer resistance in internal surface [ -square meter · K/W [ - ]]；RseHeat transfer resistance [ -square meter · K/W ] on external surface]。
anInner surface heat exchange coefficient W/(+) square meter K)]And the value is 7.7.
awExternal surface heat exchange coefficient [ W/(+) square meter K)]And a value of 25.
Therefore, R _ si is 0.13 square meter, K/W; and R _ se is 0.04 square meter K/W.
And 103, obtaining the thickness of the vacuum heat insulation plate and the thickness of the polyurethane plate according to the thermal resistance of each material obtained in the step 102.
δ＝R·λ (7)
Rsi0.13 square meter, K/W; 0.04 square meter, K/W; δ: thickness (m) of each material layer.
λ: and (3) calculating a parameter [ W/(m.K) ] of the thermal conductivity of each material, and determining according to the material performance.
For λ: in the practical calculation of the present invention, at least the following thermal conductivity coefficients are required:
the heat conductivity coefficient lambda of the reinforced concrete is 1.74W/m.K, the heat conductivity coefficient lambda of the polyurethane is 0.024W/m.K, the heat conductivity coefficient lambda of the vacuum insulation panel is 0.005W/m.K, the heat conductivity coefficient lambda of the cement mortar is 0.93W/m.K, the heat conductivity coefficient lambda of the rubber-plastic cotton is 0.034W/m.K, and the heat conductivity coefficient lambda of the PE rod is 0.42W/m.K.
Whether Um can reach U or not in the whole calculation processm≤0.15[W/(㎡·K)]Depending on the value of the ratio b of the auxiliary ribs 5, the value of the different material thicknesses δ.
Since the thermal conductivity of polyurethane is greater than that of the vacuum insulation panel, the larger the proportion of the auxiliary ribs 5 is, the more disadvantageous the heat insulation performance of the whole wall is ensured. Similarly, the larger the thickness (δ) of the polyurethane 3 and the polyurethane 4 in fig. 2 is, the more disadvantageous the insulation performance of the whole wall is.
Because the value of b is influenced by the kind of connecting piece greatly, this wallboard design chooses the most unfavorable value of confirming b earlier.
Since the thermal conductivity of polyurethane is greater than that of the vacuum insulation panel, the thicker the thickness (delta) of the vacuum insulation panel is, the better the insulation performance of the whole wall can be ensured.
In actual constructionThe value of b and the thickness value delta of each material are substituted into the formulas (7), (2) and (1) to obtain the product satisfying UmTaking the required combination of b and δ.
Specifically, the outer wall panel in the embodiment of the invention adopts a V-shaped round steel anchoring piece of Hafen. Because wallboard window size difference, the wallboard size can influence the distribution and the quantity of V type round steel anchor when not having the same time, and then influences the value of b. Therefore, the most unfavorable value b of b is firstly taken as 35 percent when the method is used for calculation, and the value basically meets the requirement of any wallboard on the polyurethane auxiliary rib.
And the thickness combination of all materials of the sandwich insulating layer can be deduced according to the value of b. The polyurethane 3 and the polyurethane 4 positioned on the vacuum insulation plate need to be at least 20mm thick to well play a role in protecting the vacuum insulation plate 1), and the total thickness of the sandwich insulation layer is not more than 120mm, so that the thickness of each material of the sandwich insulation layer is 20mm polyurethane plate, 40mm vacuum insulation plate and 20mm polyurethane plate. At this time, it obtains Um＝0.151[W/(㎡·K)]。
The cross-sectional area ratio b of the auxiliary ribs 5 can be reduced to 33.23% in the model selected according to the invention. Finally, the U of the modelm＝0.149[W/(㎡·K)]
The Hafen V-shaped connecting pieces are distributed as shown in figure 3, wherein the middle shadow part is an auxiliary rib 5, the non-shadow part is a sandwich heat-insulating layer 7, and the middle blank part is a window body position, which can be seen from figure 3. Further, the sectional area of the auxiliary ribs 5 is larger than that of the connecting pieces 6, so that the sandwich insulation layer 7 shown in fig. 3 can be protected.
If the Thermomass connecting piece is adopted, the auxiliary ribs 5 are distributed as shown in figure 7, and the connecting piece 6 is distributed at the corner of the rectangular sandwich heat-insulating layer 7. Further, fig. 8 is a partial enlarged view of fig. 7, and in particular, fig. 8 shows that the connecting pieces 6 pass through the auxiliary ribs, and the auxiliary ribs can prevent the connecting pieces 6 from contacting the vacuum insulation panels in the sandwich insulation layer 7, so that the connecting pieces are prevented from being damaged and losing the insulation performance.
The technical scheme of the invention provides an assembled type ultra-low energy consumption building outer wall plate structure which is a sandwich insulation layer formed by mutually laminating a vacuum insulation plate group and a group of polyurethane plates in the center, wherein at least one group of through holes for the connecting pieces to pass through are formed in the sandwich insulation layer. Auxiliary ribs are arranged between the inner wall of each through hole and the connecting piece, and the edges of the sandwich heat-insulating layer are wrapped with the auxiliary ribs. The connecting piece passes through the auxiliary rib of the through hole on the sandwich insulation layer, one end of the connecting piece is connected with the outer blade plate, and the other end is connected with the inner blade plate. The technical scheme of the invention also provides a manufacturing method of the assembled type ultra-low energy consumption building external wall panel, which comprises the following steps: and after the heat transfer coefficient of the outer wall main body which can enable the average heat transfer coefficient of the whole wall of the outer wall panel to be not more than the standard value is obtained, the section occupation ratio a of the vacuum insulation panel and the section occupation ratio b of the auxiliary ribs are further obtained. And obtaining the thickness of the vacuum heat insulation plate according to the heat transfer coefficient U of the main section of the structure. And finally, continuously optimizing the value of b. Resulting in the final wallboard construction.
The invention has the advantages that the heat transfer coefficient of the whole wall is reduced by changing the material and the composition mode of the heat-insulating sandwich layer under the condition of keeping the thickness of the heat-insulating sandwich layer within 120 mm. The sandwich insulation layer consists of a polyurethane layer and a vacuum insulation board layer. The polyurethane layers are distributed on two sides as protective layers and are tightly attached to the inner and outer leaf plates, so that the purpose of preventing the vacuum insulation plate from being damaged in the production process of the prefabricated sandwich external wall panel is achieved. Furthermore, auxiliary ribs are provided between the vacuum insulation panels, and the auxiliary ribs have the same thickness as the vacuum insulation panels. The position of the auxiliary rib is designed according to the distribution diagram of the connector provided by a component factory, and the purpose is to fix the vacuum insulation panel; the vacuum insulation plate is prevented from being damaged when the connecting piece is installed and the vacuum insulation plate is prevented from being damaged in the transportation process of the prefabricated sandwich external wall panel.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an assembled ultralow energy consumption building side fascia structure, is including interior acanthus leaf, outer acanthus leaf, core heat preservation and connecting piece, its characterized in that:
the sandwich heat-insulating layer is formed by mutually laminating a vacuum heat-insulating plate group at the center and a group of polyurethane plates;
the sandwich heat-insulating layer is provided with at least one group of through holes for the connecting pieces to pass through;
the inner wall of each perforation is filled with auxiliary ribs;
the auxiliary ribs are wrapped around the sandwich insulating layer;
the connecting piece penetrates through the auxiliary rib in the through hole on the sandwich insulation layer, one end of the connecting piece is connected with the outer blade plate, and the other end of the connecting piece is connected with the inner blade plate.
2. The fabricated ultra-low energy consumption building exterior panel structure according to claim 1, wherein one of the vacuum insulation panel groups has a thickness of 40 mm.
3. The fabricated ultra-low energy consumption building exterior panel structure of claim 1, wherein one polyurethane panel of the polyurethane panel set is 20mm thick.
4. The fabricated ultra-low energy consumption building panel structure of claim 1, wherein a cross-sectional area of the auxiliary rib at the perforation is greater than a cross-sectional area of the connection member.
5. The method for manufacturing the assembled ultra-low energy consumption building external wall panel is applied to the assembled ultra-low energy consumption building external wall panel structure as claimed in any one of claims 1 to 4, and is characterized by comprising the following steps:
obtaining the average heat transfer coefficient U of the whole external wall panelmHeat transfer coefficient U of external wall main body not greater than standard valuep；
According to the heat transfer coefficient U of the outer wall main bodypAcquiring thermal resistances of polyurethane and the vacuum insulation panel at different sections;
and obtaining the thickness of the vacuum heat insulation plate and the thickness of the polyurethane plate according to the thermal resistances of the polyurethane and the vacuum heat insulation plate at different sections.
6. The method for manufacturing the fabricated building external wall panel with ultra-low energy consumption according to claim 5, wherein the manufacturing method comprises the following steps:
the cross section occupation ratio a of the vacuum heat insulation plate is larger than the cross section occupation ratio b of the auxiliary ribs.
7. The method for manufacturing the fabricated building external wall panel with ultra-low energy consumption according to claim 6, wherein the manufacturing method comprises the following steps:
and determining the positions of the through holes according to the positions of the connecting pieces on the building external wall panel.
8. The method for manufacturing the fabricated building external wall panel with ultra-low energy consumption as claimed in any one of claims 5 or 6, wherein the manufacturing method further comprises:
and obtaining the thickness of the polyurethane plate according to the heat transfer coefficient of the main section of the structure.
9. The method for manufacturing an assembled ultra-low energy consumption building external wall panel according to any one of claims 5 to 8, further comprising fixing a sandwich insulation layer composed of the vacuum insulation panels and the polyurethane panels between the inner and outer blades by penetrating the auxiliary ribs with connectors.
10. The method for manufacturing the fabricated ultra-low energy consumption building external wall panel according to claim 9, wherein the sandwich insulation layer is formed by laminating a plurality of vacuum insulation panels and a plurality of polyurethane panels.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116065757A (en) * | 2023-03-24 | 2023-05-05 | 河北省建筑科学研究院有限公司 | Assembled heat-insulating composite wallboard for near-zero-carbon building and construction method thereof |
| CN117183084A (en) * | 2023-11-07 | 2023-12-08 | 北京建工四建工程建设有限公司 | Manufacturing method of sandwich external wall panel with VIP (VIP) board composite heat insulation layer |
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2019
- 2019-12-02 CN CN201911213046.0A patent/CN111075105A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116065757A (en) * | 2023-03-24 | 2023-05-05 | 河北省建筑科学研究院有限公司 | Assembled heat-insulating composite wallboard for near-zero-carbon building and construction method thereof |
| CN117183084A (en) * | 2023-11-07 | 2023-12-08 | 北京建工四建工程建设有限公司 | Manufacturing method of sandwich external wall panel with VIP (VIP) board composite heat insulation layer |
| CN117183084B (en) * | 2023-11-07 | 2024-02-27 | 北京建工四建工程建设有限公司 | Manufacturing method of sandwich external wall panel with VIP (VIP) board composite heat insulation layer |
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