A small dragon bone system for hanging on the outer wall of a building with external thermal insulation
By using a small keel dry-hanging system and polyurethane foam technology, the problem of modifying the external wall insulation system of existing buildings was solved, achieving dry construction and preservation of insulation effect, reducing construction waste and construction period, and improving construction efficiency.
Patent Information
- Application Number
- CN202522377012.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-10
AI Technical Summary
Existing building exterior wall insulation systems suffer from problems such as cracking, water seepage, hollowing, and peeling. They are difficult to renovate, generate a large amount of waste after demolition, affect residents' lives, have long renovation periods, and have poor thermal insulation effects.
A small keel dry-hanging system is adopted, in which decorative panels are fixed to the small keel by U-shaped and T-shaped fasteners, and polyurethane foam is filled into the cavity of the existing insulation system to restore the fixing and insulation effects.
It enables the renovation of decorative surfaces without removing the existing insulation system, shortens the construction period, reduces waste generation, preserves the original insulation effect, solves the problem of wet construction, and improves construction efficiency and environmental impact.
Smart Images

Figure CN224943496U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the renovation of building exterior walls, specifically a small keel dry-hanging system for the renovation of existing exterior wall insulation buildings. Background Technology
[0002] Currently, existing building exterior wall insulation systems are plagued by numerous problems, including cracking, water seepage, hollowing, and peeling. Many existing building exterior wall insulation systems are nearing the end of their design lifespan, and many newly constructed building exterior wall insulation systems are also experiencing detachment under severe weather conditions. This is especially true in northern regions where exterior wall insulation thickness often exceeds 100mm, posing a greater risk. Furthermore, the renovation of existing building exterior wall insulation systems is quite difficult. After the systems are removed, large amounts of construction waste cannot be removed, renovations are lengthy, and dust and noise severely impact the lives of residents. Additionally, there are issues such as the renovation failing to achieve the original insulation and heat insulation effects. Utility Model Content
[0003] In view of the above problems, this utility model proposes a small-frame dry-hanging system for the renovation of existing external wall insulation buildings.
[0004] The technical solution of this utility model: A small-frame dry-hanging system for renovating existing exterior wall insulation is disclosed. The system is installed on the exterior wall, which includes a base wall and an existing insulation system mounted on the base wall. The small-frame dry-hanging system includes decorative panels and a plurality of small frames. The decorative panels are dry-hanged onto each small frame via several fasteners A. The small frames are connected to the base wall via fasteners B, which pass through cavities in the existing insulation system. These cavities are filled with polyurethane foam. The polyurethane foam repairs the cavities (created by cutting) in the existing insulation system, eliminating thermal bridging and providing rust protection for the fasteners B.
[0005] To further refine the above technical solution, the fixing component A is a U-shaped fixing component, which is fastened to the small keel. The U-shaped fixing component has fixing bolts installed on its side (for fixing) and leveling bolts installed on its top surface (for leveling).
[0006] Further refining the above technical solution, the fixing component B consists of two T-shaped fixing components. These two T-shaped fixing components are opposite each other and connected by bolts and nuts. One T-shaped fixing component's T-end is anchored to the base wall, and the other T-shaped fixing component's T-end is fixed to the joist. The distance can be adjusted according to the flatness of the base wall to ensure the joists are on the same horizontal plane.
[0007] The advantages of this utility model are that it has a reasonable design and simple structure, does not require the removal of the existing insulation system, retains the original insulation effect, and at the same time, it can also carry out decorative renovation of the exterior wall of the existing building; it solves the problems of long construction period and wet operation in the renovation of existing buildings, and achieves dry operation throughout the process; it solves the problem of the removal of the existing insulation system, and achieves 90% retention of the original external insulation system, which greatly reduces demolition waste. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the construction of a small keel dry-hanging system for the renovation of existing external wall insulation buildings.
[0009] Figure 2 yes Figure 1 A magnified view of a portion of the image.
[0010] The diagram shows the following components: 1. Small keel dry-hanging system; 1-1. Decorative panel; 1-2. Small keel; 1-3. U-shaped fastener; 1-4. T-shaped fastener; 1-5. Polyurethane foam; 1-6. Fixing bolt; 1-7. Leveling bolt; 1-8. Bolt and nut; 2. Base wall; 3. Existing insulation system. Detailed Implementation
[0011] like Figure 1-2 As shown, a small keel dry-hanging system for the renovation of existing exterior wall insulation buildings is provided. The small keel dry-hanging system 1 is installed on the exterior wall, and the exterior wall includes a base wall 2 and an existing insulation system 3 installed on the base wall 2. The small keel dry-hanging system 1 includes a decorative panel 1-1 and several small keels 1-2. The decorative panel 1-1 is dry-hanging on each small keel 1-2 through several U-shaped fasteners 1-3. The small keels 1-2 are connected to the base wall 1 through two T-shaped fasteners 1-4. The two T-shaped fasteners 1-4 pass through the cavity set in the existing insulation system 3. The cavity set in the existing insulation system 3 is filled with polyurethane foam 1-5. The U-shaped fasteners 1-3 are fastened to the small keels 1-2. The U-shaped fasteners 1-3 are equipped with fixing bolts 1-6 on the side (for fixing) and leveling bolts 1-7 on the top surface (for leveling). The two T-shaped fasteners 1-4 are opposite each other and connected by bolts and nuts 1-8. The T end of one T-shaped fastener 1-4 is anchored to the base wall 1, and the T end of the other T-shaped fastener 1-4 is fixed to the small keel 1-2.
[0012] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A keel-type dry-hanging system for the renovation of existing exterior wall insulation, wherein the keel-type dry-hanging system is installed on the exterior wall, the exterior wall comprising a base wall and an existing insulation system installed on the base wall; the keel-type dry-hanging system comprises decorative panels; characterized in that, The small keel dry-hanging system also includes several small keels. The decorative panel is dry-hanging on each small keel through several fasteners A. The small keel is connected to the base wall through fasteners B. The fasteners B pass through the cavity set in the existing insulation system. The cavity set in the existing insulation system is filled with polyurethane foam.
2. The small-frame dry-hanging system for the renovation of existing external wall insulation buildings according to claim 1, characterized in that, The fastener A is a U-shaped fastener, which is fastened to the small keel. The U-shaped fastener has fixing bolts installed on its side and leveling bolts installed on its top surface.
3. The small-frame dry-hanging system for the renovation of existing external wall insulation buildings according to claim 1, characterized in that, The fastener B consists of two T-shaped fasteners, which are opposite each other and connected by bolts and nuts. One T-shaped fastener's T end is anchored to the base wall, and the other T-shaped fastener's T end is fixed to the joist.
