Old wall surface reconstruction and decoration surface fixing mechanism

Abstract

The utility model relates to a kind of old wall surface reconstruction decorative surface fixing mechanism, belong to building exterior wall reconstruction technical field, including original wall, the original wall end surface is equipped with wall painting layer, the wall painting layer front end is equipped with outer wall decorative board, the outer wall decorative board and wall painting layer are equipped with adhesive mortar, the adhesive mortar is equipped with several anchor bars, the anchor bar and original wall are equipped with mechanical anchor bolt, which is through wall painting layer and extends to original wall inside, the traditional "adhesion" is combined with reliable "mechanical anchoring", to form a double security fixed structure, to solve the problem that decorative board is easy to fall off due to the insufficient strength of base layer, weathering and other reasons of old wall surface. Even if the adhesion between adhesive mortar and wall painting layer weakens, the mechanical anchoring system can also provide strong pulling effect to prevent decorative board from falling.

Description

Technical Field

[0001] This utility model relates to the field of building exterior wall renovation technology, specifically to a fixing mechanism for the decorative surface of old walls. Background Technology

[0002] For older buildings, the detachment of exterior wall finishes (such as stone, ceramic tiles, and integrated insulation panels) has always been a major safety challenge faced by the industry. It involves a complex series of material, design, construction, and environmental factors, which can be summarized into the following categories: 1. Problems with the base wall Insufficient strength and aging: The plaster and putty layers of old walls often become loose, hollow, and cracked due to their age, making it impossible for new decorative layers to adhere firmly.

[0003] Improper interface treatment: If the substrate is not cleaned properly or an interface agent is not applied, it will seriously affect the adhesion between the adhesive material and the wall.

[0004] Poor flatness: If the flatness of the base layer is not up to standard, it will lead to uneven thickness of the bonding mortar, which can easily cause local stress concentration, and then cracking and falling off.

[0005] 2. Material and bonding issues Poor quality of bonding materials: The use of inferior bonding mortar, inaccurate cement ratio, and poor weather resistance leads to a significant decrease in bonding strength over time.

[0006] Insufficient bonding area: The specifications require that the bonding area should usually be no less than 40%, but in actual construction, due to shoddy workmanship or improper processes, the effective bonding area is often too small.

[0007] High water absorption rate of insulation boards: Some insulation materials (such as phenolic boards) have a high water absorption rate and are prone to cracking under freeze-thaw cycles, which damages the bonding layer.

[0008] 3. Defects in construction techniques Improper construction practices, such as uneven application of bonding mortar, proceeding to the next step before the mortar is fully dry, and incorrect anchor bolt installation, can all seriously affect the safety of the system.

[0009] Inappropriate anchoring method: Anchors are only used as auxiliary fixation. If the anchoring depth is insufficient, the number is insufficient, or the distribution is unreasonable, they cannot provide effective protection when the bond fails.

[0010] 4. Environmental and External Factors Freeze-thaw cycles and moisture: Moisture penetrates the adhesive layer, and repeated freeze-thaw cycles cause the material to expand and contract, eventually leading to adhesive failure.

[0011] Wind pressure and vibration: In high-rise buildings or coastal areas, negative wind pressure can generate a huge suction force on the exterior walls. Without reliable mechanical anchoring, it is very easy to cause large-scale detachment.

[0012] Structural deformation: Foundation settlement, temperature changes, etc. can cause wall deformation, which can also lead to cracking and peeling of the decorative surface layer. Summary of the Invention

[0013] This utility model mainly addresses the shortcomings of existing technologies by providing a fixing mechanism for decorative panels in the renovation of old walls. It combines traditional "adhesion" with reliable "mechanical anchoring" to form a double-protected fixing structure, thereby solving the problem of decorative panels easily falling off old walls due to insufficient base strength, weathering, and other reasons.

[0014] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A fixing mechanism for the decorative surface of an old wall renovation includes an original wall, a wall plaster layer on one end face of the original wall, an exterior wall decorative panel on the front end of the wall plaster layer, an adhesive mortar between the exterior wall decorative panel and the wall plaster layer, a plurality of anchor bars in the adhesive mortar, and a mechanical anchor bolt that penetrates the wall plaster layer and extends into the original wall between the anchor bars and the original wall.

[0015] Preferably, a nut, threadedly connected to a mechanical anchor bolt, is provided between the anchor bar and the wall plaster layer, and a washer, also threadedly connected to the mechanical anchor bolt, is provided between the nut and the wall plaster layer. This makes the connection adjustable and secure, and increases the protection of the wall surface.

[0016] Preferably, the gasket diameter is greater than 50mm. This ensures sufficient load-bearing area on a porous wall surface, preventing localized damage.

[0017] Preferably, the adhesive mortar has a rectangular block structure, and the adhesive mortar is applied at 500mm intervals. Compared with full-body bonding, this "spot bonding" or "strip bonding" method is more conducive to the expulsion of moisture from inside the wall, avoids hollow areas, and clarifies the density of the anchor points.

[0018] Preferably, the upper and lower ends of the bonding mortar are cavities or mortar. It is emphasized that the system has air-permeable and drainage functions, which are crucial for preventing freeze-thaw damage and internal dampness.

[0019] Preferably, the mechanical anchor is inserted into the original wall to a depth of 50mm or more. This is a key parameter to ensure that the entire mechanical system can obtain sufficient pull-out force from the solid "original wall".

[0020] Preferably, the mechanical anchor bolts are welded to the anchor bars for fixation. Welding the anchor bars and anchor bolts together forms a rigid connection, which can prevent the nuts from loosening due to vibration or long-term loads, making it suitable for applications with higher requirements for earthquake and wind resistance.

[0021] Preferably, the anchor bar has a multi-bend ingot-shaped structure. This increases the contact area and interlocking force with the mortar, improving the anchoring effect. It provides mechanical support in multiple directions, better resisting shear and pull-out forces. Its stable shape makes it easy to position within the mortar.

[0022] Preferably, the wall plaster layer includes an insulation layer, a fireproof layer, and a putty layer.

[0023] This invention can achieve the following effects: This invention provides a fixing mechanism for decorative panels on old walls. Compared with existing technologies, it combines traditional "adhesion" with reliable "mechanical anchoring" to form a double-protection fixing structure, solving the problem of decorative panels easily falling off old walls due to insufficient base strength, weathering, and other reasons. A mechanical anchor firmly fixes an anchor bar to the deep original wall structure. This anchor bar is then wrapped in adhesive mortar, forming a unified whole with the decorative panel. Even if the adhesion between the adhesive mortar and the wall plaster layer weakens, the mechanical anchoring system still provides a strong tethering effect, preventing the decorative panel from falling off.

[0024] Dual safety guarantee: The "adhesive + mechanical anchoring" mode ensures that even if the adhesive fails, the mechanical system can still provide reliable tensile force, greatly reducing the risk of decorative panels falling off.

[0025] Highly adaptable: Suitable for various old, loose, and weak wall substrates.

[0026] While ensuring breathability: The spot bonding method creates breathing channels for the wall, which helps to expel moisture and avoids hollowing and freeze-thaw damage.

[0027] Construction is relatively convenient: Compared to complex keel systems, the construction steps of this method are relatively simple and cause less damage to the original wall surface.

[0028] High reliability: By specifying key parameters such as anchor bolt depth, gasket size, and anchor bar shape, the mechanical performance and long-term stability of the system are ensured. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model.

[0030] In the diagram: 1. Exterior wall decorative panel; 2. Adhesive mortar; 3. Wall plaster layer; 4. Original wall; 5. Mechanical anchor bolt; 6. Nut; 7. Washer; 8. Anchor bar. Detailed Implementation

[0031] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0032] Example: Figure 1 As shown, a fixing mechanism for the decorative surface of an old wall renovation includes an original wall 4. The original wall 4 has a wall plaster layer 3 on its end face, which includes an insulation layer, a fireproof layer, and a putty layer. An exterior wall decorative panel 1 is located at the front end of the wall plaster layer 3. An adhesive mortar 2 is placed between the exterior wall decorative panel 1 and the wall plaster layer 3. The adhesive mortar 2 has a rectangular block structure with a spacing of 500mm. The upper and lower ends of the adhesive mortar 2 are hollow or filled with mortar. Several anchor bars 8 are provided within the adhesive mortar 2, and the anchor bars 8 have a multi-bent ingot-shaped structure. Mechanical anchor bolts 5 penetrate the wall plaster layer 3 and extend into the original wall 4 between the anchor bars 8 and the original wall 4. The mechanical anchor bolts 5 are welded to the anchor bars 8 for fixation. The depth of insertion of the mechanical anchor bolts 5 into the original wall 4 is 50mm or more. A nut 6, which is threadedly connected to the mechanical anchor bolt 5, is provided between the anchor bar 8 and the wall plaster layer 3. A washer 7, which is connected to the mechanical anchor bolt 5, is provided between the nut 6 and the wall plaster layer 3. The diameter of the washer 7 is greater than 50mm.

[0033] Working Principle: Determine the anchoring point location on the old wall surface. Drill holes, ensuring the holes penetrate the plaster layer and reach a depth of at least 50mm into the original wall 4. Hammer the mechanical anchor bolt 5 into the hole, allowing it to expand and fix itself within the original wall 4. Place the washer 7 and nut 6 in sequence, tighten the nut, and firmly fix the anchor bar 8 to the wall surface. Place the ingot-shaped anchor bar 8 onto the mechanical anchor bolt 5. Weld the anchor bar 8 to the end of the mechanical anchor bolt 5 to form a more reliable rigid connection. Apply adhesive mortar 2 in a dotted or striped pattern on the wall surface, ensuring the mortar covers the anchor bar 8. Press the exterior wall decorative panel 1 onto the adhesive mortar 2 to complete the installation.

[0034] In summary, this old wall renovation decorative panel fixing mechanism combines traditional "adhesion" with reliable "mechanical anchoring" to form a dual-protection fixing structure, solving the problem of decorative panels easily falling off old walls due to insufficient base strength, weathering, and other reasons. A mechanical anchor firmly fixes an anchor bar to the deep original wall structure, and this anchor bar is then wrapped in adhesive mortar, forming a unified whole with the decorative panel. Even if the adhesion between the adhesive mortar and the wall plaster layer weakens, the mechanical anchoring system can still provide a strong tethering effect, preventing the decorative panel from falling off.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A fixing mechanism for decorative surfaces in the renovation of old walls, comprising the original wall (4), characterized in that: The original wall (4) end face is provided with a wall plaster layer (3), the front end of the wall plaster layer (3) is provided with an exterior wall decorative panel (1), the exterior wall decorative panel (1) and the wall plaster layer (3) are provided with adhesive mortar (2), the adhesive mortar (2) is provided with a number of anchor bars (8), and the anchor bars (8) and the original wall (4) are provided with mechanical anchor bolts (5) that penetrate the wall plaster layer (3) and extend into the original wall (4).

2. The fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The anchor bar (8) and the wall plaster layer (3) are provided with a nut (6) that is threadedly connected to the mechanical anchor bolt (5), and the nut (6) and the wall plaster layer (3) are provided with a washer (7) that is connected to the mechanical anchor bolt (5).

3. The fixing mechanism for decorative surfaces in old wall renovation according to claim 2, characterized in that: The gasket (7) has a diameter greater than 50 mm.

4. The fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The adhesive mortar (2) has a rectangular block structure and the adhesive mortar (2) is spaced at 500mm intervals.

5. The fixing mechanism for decorative surfaces in old wall renovation according to claim 4, characterized in that: The upper and lower ends of the adhesive mortar (2) are cavities or mortar.

6. The fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The mechanical anchor (5) is inserted into the original wall (4) to a depth of 50 mm or more.

7. The fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The mechanical anchor bolt (5) is connected and fixed to the anchor bar (8) by electric welding.

8. The fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The anchoring bar (8) has a multi-bend ingot-shaped structure.

9. A fixing mechanism for decorative surfaces in old wall renovation according to claim 1, characterized in that: The wall plastering layer (3) includes an insulation layer, a fireproof layer and a putty layer.

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