Gravel-containing paste base self-leveling structure
By introducing a combination design of heat-conducting plates and self-leveling layers into the underfloor heating structure, the problems of insufficient strength of extruded polystyrene boards and slow heat conduction of gypsum self-leveling layers are solved, achieving efficient and stable underfloor heating systems and uniform heat transfer.
Patent Information
- Application Number
- CN202520589176.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In existing underfloor heating structures, the extruded polystyrene board insulation layer has low strength, poor fire resistance and durability, and the underfloor heating pipes are easily damaged. The gypsum self-leveling mortar has a low thermal conductivity, which affects the underfloor heating effect.
The structure adopts a bottom-up approach, including a base layer, a self-leveling layer one, an insulation layer, underfloor heating pipes, a heat-conducting plate, and a self-leveling layer two. The heat-conducting plate is matched with the underfloor heating pipes and uses high thermal conductivity materials to replace the traditional cement mortar leveling layer, thereby enhancing the stability of the underfloor heating pipes and the efficiency of heat transfer.
The thickness of the self-leveling structure for underfloor heating has been reduced, simplifying construction, improving heat transfer efficiency, reducing heat loss, and enhancing the stability and thermal conductivity of the underfloor heating pipes.
Smart Images
Figure CN223952170U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building structure technical field, and the specific field is a kind of sand gypsum-based self-leveling structure. BACKGROUND
[0002] The ground heating radiation heating, referred to as ground heating, is a kind of heating mode that hot water or heating cable is buried in the coil system under the ground heating to heat the whole ground, and the heat is radiated to the indoor uniformly through the ground. Ground heating has been widely used in people's daily life, and is favored by the public due to its comfort, energy saving and other characteristics.
[0003] At present, the ground heating floor structure is as follows from bottom to top: floor or ground adjacent to soil; cement mortar leveling layer; extruded board thermal insulation layer; ground heating pipe; pea gravel concrete filling layer; cement mortar leveling layer; and ground decoration material. The extruded board thermal insulation layer is made of high molecular organic material, which has good thermal insulation performance, but the strength is not high, the fire resistance and durability are poor, and there is a risk of collapse and subsidence of the ground heating structure with the extension of service life. Most of the ground heating pipes are made of PE material, which has low thermal conductivity; the pea gravel filling layer is backfilled on the ground heating pipe once, and the ground heating pipe is damaged and moved to different degrees due to gravity and impact of pea gravel, thereby affecting the heat conduction performance.
[0004] In addition, the existing gypsum self-leveling ground heating backfill structure generally directly pours gypsum self-leveling mortar on the laid ground heating pipe to realize leveling. However, most of the gypsum self-leveling mortar has low thermal conductivity and slow heat transfer speed, which greatly affects the effect of ground heating. CONTENT OF THE UTILITY MODEL
[0005] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a sand gypsum-based self-leveling structure.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a sand gypsum-based self-leveling structure, which comprises, from bottom to top, a base layer, a self-leveling layer one, a thermal insulation layer, a ground heating pipe, a heat conducting plate, a self-leveling layer two and a decoration layer, the cross-section lower side of the heat conducting plate is provided with a semicircular opening, the semicircular opening width is matched with the cross-section outer diameter of the ground heating pipe, the heat conducting plate is arranged above the ground heating pipe in a lamination manner, and the height of the self-leveling layer two is the same as the height of the ground heating pipe and the heat conducting plate after cooperation.
[0007] In some embodiments, the self-leveling layer one and the self-leveling layer two are made of the same sand gypsum-based self-leveling mortar.
[0008] In some embodiments, the heat conducting plate is made of metal or hard plastic with high thermal conductivity.
[0009] In some embodiments, the decorative layer is laid on the upper surface of the heat-conducting plate.
[0010] In some embodiments, the floor heating pipe is a PE pipe.
[0011] Compared with the prior art, the self-leveling floor heating structure has the advantages that: the self-leveling mortar layer and the heat insulation layer are arranged to replace the traditional cement mortar leveling layer and the heat insulation layer, the thickness of the self-leveling floor heating structure is reduced, the construction process is simplified, and the cost is reduced.
[0012] Meanwhile, the arrangement of the floor heating pipe, the heat-conducting plate and the second self-leveling layer ensures the stability of the floor heating pipe passing through the second self-leveling layer, and the arrangement of the heat-conducting plate can improve the heat conduction and the heat transfer efficiency, and reduce the heat loss of the self-leveling floor heating structure during the heat conduction.
[0013] The details of one or more embodiments of the present application are presented in the following drawings and description to make the other features, purposes and advantages of the present application more clear, concise and easy to understand. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a cross-sectional schematic view of the present application.
[0015] In the figure: 1, base layer; 2, self-leveling layer one; 3, heat insulation layer; 4, floor heating pipe; 5, heat-conducting plate; 6, self-leveling layer two; 7, decorative layer. DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0017] Please refer to Figure 1 The present application provides a technical solution: a sandstone gypsum-based self-leveling structure, which comprises, from bottom to top, a base layer 1, a self-leveling layer one 2, a heat insulation layer 3, a floor heating pipe 4, a heat-conducting plate 5, a self-leveling layer two 6 and a decorative layer 7. The lower side of the cross section of the heat-conducting plate 5 is provided with a semicircular opening, and the width of the semicircular opening is matched with the outer diameter of the cross section of the floor heating pipe 4. The heat-conducting plate 5 is arranged above the floor heating pipe 4 in a fitted manner. The height of the self-leveling layer two 6 is the same as the height of the floor heating pipe 4 and the heat-conducting plate 5 after cooperation.
[0018] The self-leveling layer one 2 and the self-leveling layer two 6 are made of the same sandstone gypsum-based self-leveling mortar.
[0019] The heat-conducting plate 5 is made of metal or hard plastic with high thermal conductivity.
[0020] The decorative layer 7 is laid on the upper surface of the heat-conducting plate 5.
[0021] The floor heating pipe 4 is a PE pipe.
[0022] Through the technical scheme,
[0023] The base layer 1 is a concrete or mortar layer, which is polished, cleaned and treated with an interface agent to ensure firm adhesion with the upper layer.
[0024] The self-leveling layer one 2 is made of a sand-containing gypsum-based self-leveling mortar and has a thickness of 3-50 mm, serving as a base leveling layer.
[0025] The heat insulation layer 3 is made of extruded polystyrene board (XPS) or polyurethane foam material and has a thickness of 10-30 mm, which blocks heat loss downward.
[0026] The floor heating pipe 4 is a PE pipe, which is laid on the heat insulation layer 3 at a preset interval (100-300 mm) and is used for hot water circulation heating.
[0027] The heat-conducting plate 5 has a semicircular opening on the lower side of the cross section, the opening width is matched with the outer diameter (such as Φ16 mm) of the floor heating pipe 4, and the heat-conducting plate 5 is covered on the floor heating pipe 4 and closely adheres to the floor heating pipe 4. The heat-conducting plate 5 is made of high-thermal-conductivity metal (such as aluminum alloy) or hard plastic (such as PPS), has a thickness of 1-3 mm, and has a transverse extension width of 1 / 2-1 times the interval of the floor heating pipe 4, so as to realize uniform heat diffusion.
[0028] The self-leveling layer two 6 is the same sand-containing gypsum-based self-leveling mortar as the self-leveling layer one 2, which fills the gap between the floor heating pipe 4 and the heat-conducting plate 5, has a height consistent with the total height of the floor heating pipe 4 and the heat-conducting plate 5, and forms a flat bearing layer.
[0029] The decorative layer 7 is laid on the upper surface of the heat-conducting plate 5 and includes wood floor, ceramic tile or thin stone, and has a thickness of ≤10 mm.
[0030] Preferred scheme
[0031] The self-leveling layer one 2 and the self-leveling layer two 6 are made of the same sand-containing gypsum-based self-leveling mortar, have a water-cement ratio of 0.25-0.3, a compressive strength of ≥20 MPa, and a shrinkage rate of ≤0.15 mm / m.
[0032] The heat-conducting plate 5 is provided with transverse grooves or convex textures on the surface to enhance the mechanical engagement force with the self-leveling layer two 6.
[0033] The floor heating pipe 4 is made of PE-RT or PE-Xa material, has a temperature resistance range of -40℃-95℃, and has a working pressure of ≤0.8 MPa.
[0034] Decorative layer 7: It is directly fixed to the surface of the heat-conducting plate 5 by adhesive or clips to avoid damaging the self-leveling layer structure.
[0035] According to the scheme in this application, its implementation process is as follows:
[0036] Base layer 1 treatment: Clean the concrete base layer 1, apply epoxy interface agent, and proceed with construction after drying.
[0037] Construction of self-leveling layer 1: Mix premixed gypsum-based self-leveling mortar (mixing ratio: 55% α-hemihydrate gypsum, 40% quartz sand, 1.5% water-reducing agent, 0.5% water-retaining agent) with water (water-cement ratio 0.28), pump and pour to a thickness of 20mm, and allow it to level naturally.
[0038] 3. Install insulation layer: Install 20mm thick XPS board and seal the joints with aluminum foil tape.
[0039] Installation of underfloor heating pipe 4: Lay PE-RT pipes (Φ16mm) at 200mm intervals and fix them to the surface of XPS board with clips.
[0040] Covering heat-conducting plate 5: Select 1.5mm thick aluminum alloy heat-conducting plate 5, with a semi-circular opening width of 16.5mm, covering along the direction of the underfloor heating pipe 4, with a horizontal extension width of 100mm.
[0041] Construction of Self-Leveling Layer 2: Use the same material as Self-Leveling Layer 1, 2, and pour it onto the upper surface of the heat-conducting plate 5. The final thickness is 17.5mm, which is the total height of the underfloor heating pipe 4 (16mm) and the heat-conducting plate 5 (1.5mm).
[0042] Decorative layer 7 installation: After 24 hours, directly glue the wood flooring (8mm thick) onto the surface of the heat-conducting plate 5.
[0043] Results Verification: Tests showed that the ground heating rate was 25% higher than that of traditional fine aggregate concrete backfill, the surface temperature difference was ≤1.5℃, the oven-dry compressive strength was 22.3MPa, and there was no cracking.
[0044] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A self-leveling structure with a sand-plaster base, characterized in that: From bottom to top, the layers include a base layer (1), a self-leveling layer one (2), a heat insulation layer (3), a floor heating pipe (4), a heat-conducting plate (5), a self-leveling layer two (6), and a decorative layer (7). The lower side of the cross-section of the heat-conducting plate (5) is set with a semi-circular opening, and the width of the semi-circular opening is adapted to the outer diameter of the cross-section of the floor heating pipe (4). The heat-conducting plate (5) is placed above the floor heating pipe (4) and fits together. The height of the self-leveling layer two (6) is the same as the height of the floor heating pipe (4) and the heat-conducting plate (5) after they are combined.
2. The self-leveling structure with sand-based gypsum as described in claim 1, characterized in that: The self-leveling layer one (2) and the self-leveling layer two (6) are made of the same sand-based gypsum self-leveling mortar.
3. The self-leveling structure with sand-based gypsum as described in claim 1, characterized in that: The heat-conducting plate (5) is made of metal or hard plastic with high thermal conductivity.
4. The self-leveling structure with sand-based gypsum as described in claim 1, characterized in that: The decorative layer (7) is laid on the upper surface of the heat-conducting plate (5).
5. A self-leveling structure with sand-based gypsum according to claim 1, characterized in that: The underfloor heating pipe (4) is a PE pipe.