Floor panel and assembled floor panel for an integrated underfloor heating system

CN224902654UActive Publication Date: 2026-10-27JIXIAOJIA (CHANGZHOU) RESIDENTIAL TECH CO LTD
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Patent Information

Application Number
CN202522338088.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-04
Publication Date
2026-10-27
Estimated Expiration
2035-11-04

AI Technical Summary

Technical Problem

这种施工方式存在诸多弊端:首先,工序复杂,施工周期长,对施工人员的技术要求高;其次,现场盘绕的发热电缆间距不均,容易导致地面温度分布不均匀,影响采暖舒适度;再次,混凝土填充层增加了楼板荷载和结构厚度,且一旦发热电缆损坏,维修极为困难,需要破坏整个地面

Benefits of technology

[0018]本实用新型具有积极的效果:(1)本实用新型中底板具有模块化与标准化特点,其将承重、保温、反射、均热、装饰等功能集于一体,形成标准化的预制板材,极大简化了现场施工工序,提高了安装效率和质量一致性。

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a kind of bottom plate of integrated floor heating system and fabricated kitchen and sanitary bottom disc, its bottom plate includes the bottom surface base plate being enclosed with edge cover section bar in four around, bottom surface base plate sequentially includes load-bearing core layer, heat insulation board, aluminium foil reflective film layer, silicon crystal net layer and decorative surface layer from below to above.Its innovation point is that the threading groove for threading heating cable is arranged on the upper end surface of heat insulation board, threading metal pipe is embedded in the groove, the both ends of the metal pipe are fixedly connected with the threading inlet and threading outlet on the edge cover section bar of bottom plate respectively and communicate.The aluminium foil reflective film layer covers and adapts the surface of the heat insulation board with groove, silicon crystal net layer and decorative surface layer cover it in turn.The utility model precast the wiring channel of floor heating heating cable in the inside of bottom plate, so that bottom plate and the bottom disc formed by its assembly realize the modularization, standardization integration of ground decoration and heating function, with the advantages of easy installation, high thermal efficiency, safe and reliable, structure stable and the like.
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Description

Technical Field

[0001] This utility model relates to the field of prefabricated kitchens and bathrooms, and in particular to a base plate and prefabricated chassis for an integrated underfloor heating system. Background Technology

[0002] Prefabricated kitchens and bathrooms have now entered the third generation of products, centered on aluminum alloy frame structures. This third-generation aluminum alloy prefabricated integrated kitchen and bathroom system fully utilizes the structural strength, high precision, and ease of processing of aluminum profiles, enabling rapid assembly and flexible customization. It is compatible with various finishing materials such as ceramic tiles, natural stone, and sintered stone, and allows for pre-embedded and integrated pipelines. Its core advantages lie in its low-carbon and environmentally friendly process, fully customizable products, reduced building load, and pursuit of high standards such as "zero leakage, zero hollow areas, and zero detachment."

[0003] However, in actual installation, even with the third-generation product, the following areas still require improvement: I. Currently, prefabricated kitchens and bathrooms, due to their modular structure, cannot effectively implement underfloor heating. Traditional radiant floor heating systems typically involve laying insulation boards, reflective film, and wire mesh on-site after the building's subfloor construction is complete. Heating cables are then manually coiled and fixed, and finally, a concrete filling layer is poured and floor finishing materials are laid. This construction method has many drawbacks: First, the process is complex, the construction period is long, and it requires highly skilled workers; second, the uneven spacing of the coiled heating cables can easily lead to uneven floor temperature distribution, affecting heating comfort; third, the concrete filling layer increases the floor load and structural thickness, and repairs are extremely difficult if the heating cables are damaged, requiring the destruction of the entire floor. However, precisely because of the unique construction requirements of underfloor heating, prefabricated underfloor heating system chassis have not yet appeared in existing prefabricated kitchens and bathrooms.

[0004] II. Currently, most aluminum alloy prefabricated kitchen and bathroom units still use a one-piece chassis for waterproofing. Since there are no seams in the one-piece chassis, the waterproofing effect is relatively good. However, due to the complexity of kitchen and bathroom spaces, customizing a complete chassis for the entire space would be too costly. Therefore, the shape of the chassis is divided according to the functional areas of the kitchen and bathroom, and the chassis installation for the entire space is achieved by splicing together the chassis panels from multiple functional areas. At the same time, sealant is applied at the joints between the chassis panels to minimize leakage.

[0005] The method of forming the interlocking positioning benchmarks has led to problems with sealing the joints at the connection points. Traditionally, these joints are sealed with sealant, but the amount of sealant applied is minimal, posing a risk of leakage over time. Furthermore, the need for sealant application at the base plate joints increases the number of construction steps involved in chassis assembly, impacting construction efficiency. Utility Model Content

[0006] The purpose of this utility model is to provide a base plate for an integrated underfloor heating system, which prefabricates the wiring channels of the underfloor heating cables inside the base plate, thereby realizing the modular and standardized integration of floor decoration and heating functions. It has the advantages of easy installation, high thermal efficiency, safety and reliability, and stable structure.

[0007] The technical solution to achieve the purpose of this utility model is as follows: The base plate of the integrated underfloor heating system in this utility model includes a bottom substrate with edging profiles surrounding it. The bottom substrate includes, from bottom to top, a load-bearing core layer, a heat insulation board, an aluminum foil reflective film layer, a silicon crystal mesh layer, and a decorative surface layer. The lower end face of the heat insulation board is fixedly connected to the load-bearing core layer, and the upper end face of the heat insulation board is provided with a through-hole for passing through heating cables. The aluminum foil reflective film layer covers the upper end face of the heat insulation board and is adapted to the upper end face with the through-hole arranged. The silicon crystal mesh layer covers the aluminum foil reflective film layer. The decorative surface layer is fixedly connected to the silicon crystal mesh layer by a decorative adhesive material. The cable inlet and cable outlet of the through-hole are both located on the edging profiles of the base plate.

[0008] Furthermore, a wire-threading metal pipe is embedded in the aforementioned threading groove; one end of the wire-threading metal pipe is fixedly connected to the wire-threading inlet on the edge profile of the base plate, and the other end is fixedly connected to the wire-threading outlet on the edge profile of the base plate.

[0009] Furthermore, the aforementioned metal conduit is either a corrugated metal conduit or a smooth metal conduit.

[0010] Furthermore, the aforementioned load-bearing core layer is a rigid or semi-rigid board material; it is made of one or more of the following composite materials: metal plate, honeycomb structure plate, fiber reinforced plate, foamed material plate, artificial board, stone plate, ceramic plate, cement substrate, and polymer plate. The honeycomb structure panel includes, but is not limited to, a structure in which one of aluminum honeycomb, paper honeycomb or plastic honeycomb is used as the core material and combined with a metal or non-metal panel. The fiber-reinforced board includes, but is not limited to, one of glass fiber reinforced board, carbon fiber reinforced board, basalt fiber reinforced board or wood fiber board; The engineered wood panels mentioned include, but are not limited to, organic engineered wood panels or inorganic engineered wood panels; The foamed material board includes, but is not limited to, one of polyurethane foam board, polystyrene foam board or PVC foam board, and it can be solid or have a skinned structure.

[0011] Furthermore, the aforementioned thermal insulation board is one of extruded polystyrene board, molded polystyrene board, or polyurethane insulation board.

[0012] Furthermore, the aforementioned decorative surface layer is one of wood flooring, stone-plastic flooring, composite flooring, or ceramic tile.

[0013] Furthermore, the aforementioned edging profile is an aluminum alloy profile.

[0014] The second objective of this utility model is to provide an assembled kitchen and bathroom chassis using the aforementioned base plate, which has a heating function and is characterized by rapid assembly.

[0015] The technical solution to achieve the second objective of this utility model is: the prefabricated kitchen and bathroom chassis of this utility model includes multiple base plates spliced ​​together by a splicing structure; the base plate is the base plate of the aforementioned integrated underfloor heating system.

[0016] Furthermore, the aforementioned splicing structure includes a first base plate splicing body and a second base plate splicing body; one of the two spliced ​​base plates has a first base plate splicing body integrally provided on its edging profile, and the other base plate has a second base plate splicing body integrally provided on its edging profile; the first base plate splicing body includes a first base plate splicing part, the lower end of which is integrally connected to the edging profile, and an upward-opening first base plate splicing slot is formed between the first base plate splicing part and the edging profile; the second base plate splicing body includes... The system includes a second base plate insertion part, the upper end of which is integrally connected to the edging profile. The second base plate insertion part and the edging profile form a downward-facing second base plate insertion slot. When two adjacent base plates are spliced, the corresponding first base plate insertion part is inserted into the corresponding second base plate insertion slot, and the corresponding second base plate insertion part is inserted into the corresponding first base plate insertion slot to form an interlocking assembly. Both the first and second base plate insertion parts extend from one end of the edging profile to the other end.

[0017] Furthermore, the first base plate splicing part is provided with at least one first glue-retaining groove extending along the extension direction of the first base plate splicing part on the end face of the first base plate splicing slot; the second base plate splicing part is provided with at least one second glue-retaining groove extending along the extension direction of the second base plate splicing part on the part that is in close contact with the first base plate splicing slot. The second base plate splicing body also includes a second abutment located outside the second base plate splicing slot and extending from the upper end of the second base plate splicing part away from the second base plate splicing slot; the second abutment extends from one end of the edging profile to the other end; after the two base plates are spliced, the second abutment on one base plate is in close contact with the edging profile of the other base plate that has the first base plate splicing part; a first glue filling groove is formed between the second abutment, the second base plate splicing part and the edging profile that has the first base plate splicing part; A second glue-filling groove is formed between the bottom of the groove of the second base plate splicing part and the groove of the first base plate splicing slot; The first base plate splicing body also includes a first abutment portion located outside the first base plate splicing slot and extending from the lower end of the first base plate splicing portion away from the first base plate splicing slot; the first abutment portion extends from one end of the edging profile to the other end; after the two base plates are spliced, the first abutment portion on one base plate is in close contact with the edging profile of the other base plate which has a second base plate splicing portion; an overflow groove is formed between the first abutment portion, the first base plate splicing portion and the edging profile which has a second base plate splicing portion.

[0018] The present invention has positive effects: (1) The base plate of the present invention has modular and standardized features. It integrates functions such as load-bearing, heat preservation, reflection, heat equalization and decoration into one, forming a standardized prefabricated plate, which greatly simplifies the on-site construction process and improves the installation efficiency and quality consistency.

[0019] (2) In this utility model, the bottom plate reflects the heat generated by the heating cable upward through the aluminum foil reflective film layer, reducing the downward heat loss and improving energy utilization efficiency.

[0020] (3) The silicon crystal mesh layer in this utility model not only enhances the overall structure, but also helps the heat to diffuse evenly in the lateral direction, avoids the appearance of "hot and cold stripes" on the ground, and improves comfort.

[0021] (4) The interface of the metal conduit for wiring is clearly defined in this utility model. The wire inlet and outlet are set on the edge profile, which facilitates the connection and aggregation of lines when splicing multiple base plates, making the system wiring neat and standardized.

[0022] (5) In this utility model, the wire-threading metal tube provides robust mechanical protection for the heating cable, preventing damage to the cable insulation layer due to squeezing, impact or other reasons during construction or use, and greatly improving the safety and reliability of the system.

[0023] (6) The wire metal in this utility model has good thermal conductivity, which helps to transfer the heat generated by the heating cable to the aluminum foil reflective film and decorative surface layer above more quickly and evenly, and also plays a certain role in temperature equalization.

[0024] (7) When using corrugated metal pipes in this utility model, the good flexibility of the corrugated metal pipes makes it easy to adapt to complex routing of the threading grooves (such as arc-shaped bends) during the prefabrication process. Smooth metal pipes, on the other hand, have low fluid resistance, making it easier to thread and pull wires, and may have better heat dissipation performance. Selecting different types of metal pipes according to design needs increases the flexibility of the design.

[0025] (8) The load-bearing core layer of this utility model uses magnesium oxide board and cement fiberboard, which have excellent fire resistance, moisture resistance and anti-sinking properties, and are suitable for humid environments or places with high fire protection requirements. Wood-based panels (such as OSB boards) are lightweight and easy to process, and are suitable for dry quick-installation systems. Users can choose the appropriate base material according to the specific application scenario.

[0026] (9) The thermal insulation board in this utility model adopts one of extruded polystyrene board, molded polystyrene board or polyurethane insulation board, which can effectively block the heat from being transferred to the downstairs, ensure that the heat is concentrated and radiated upwards, reduce the energy consumption of the system operation, and improve the energy-saving effect.

[0027] (10) This utility model pre-assembles the decorative surface layer onto the base plate in the factory, realizing the perfect combination of the underfloor heating system and interior decoration. Users can choose different surface layers according to the decoration style to meet personalized needs and achieve "ready to use immediately after installation".

[0028] (11) The edge-wrapping profile in this utility model not only protects the edge of the base plate and prevents damage, but also makes the product look more exquisite. The aluminum alloy profile has high strength and good texture.

[0029] (12) The prefabricated kitchen and bathroom chassis using the above-mentioned base plate in this utility model has the advantages of rapid assembly, high degree of customization, outstanding waterproofing at the splicing points, and heating function. Attached Figure Description

[0030] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the structure of the bottom plate in this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the assembly structure of the prefabricated kitchen and bathroom chassis in this utility model; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the structure of the first base plate assembly in this utility model; Figure 6 This is a schematic diagram of the structure of the second base plate assembly in this utility model; Figure 7 This is a three-dimensional schematic diagram of the bottle structure in this practical application.

[0031] In the figure, the load-bearing core layer 1, the heat insulation board 2, the through groove 21, the aluminum foil reflective film layer 3, the silicon crystal mesh layer 4, the decorative surface layer 5, the heating cable 6, the wire conduit 7, and the splicing structure 8 include a first base plate splicing body 81, a second base plate splicing body 82, a first base plate splicing part 811, a first base plate splicing slot 812, a first stop part 813, a second base plate splicing part 821, a second base plate splicing slot 822, a second stop part 823, a first glue retention groove 811a, a second glue retention groove 821a, a first glue filling groove 1a, a second glue filling groove 1b, and an overflow groove 1c. Detailed Implementation

[0032] See Figure 1 and Figure 2 The base plate of the integrated underfloor heating system in this utility model includes a bottom substrate with edging profiles surrounding it. The bottom substrate includes, from bottom to top, a load-bearing core layer 1, a heat insulation board 2, an aluminum foil reflective film layer 3, a silicon crystal mesh layer 4, and a decorative surface layer 5. The lower end face of the heat insulation board 2 is fixedly connected to the load-bearing core layer 1, and the upper end face of the heat insulation board 2 is provided with a through-groove 21 for threading heating cables 6. The aluminum foil reflective film layer 3 covers the upper end face of the heat insulation board 2 and is adapted to the upper end face of the through-groove 21 (the so-called adaptation means that the aluminum foil reflective film layer 3 will adhere to the groove wall along the recessed through-groove 21). The silicon crystal mesh layer 4 covers the aluminum foil reflective film layer 3. The decorative surface layer 5 is fixedly connected to the silicon crystal mesh layer 4 by a decorative adhesive material. The wire inlet and wire outlet of the through-groove 21 are both located on the edging profiles of the base plate.

[0033] A wire-threading metal tube 7 is embedded in the threading groove 21; one end of the wire-threading metal tube 7 is fixedly connected to the wire-threading inlet on the edge profile of the base plate, and the other end is fixedly connected to the wire-threading outlet on the edge profile of the base plate.

[0034] The threading metal tube 7 is a smooth metal tube. Smooth metal tubes have low fluid resistance, making threading and pulling easier, and may offer better heat dissipation. Corrugated metal tubes can also be selected according to design needs, increasing design flexibility. The load-bearing core layer 1 is a honeycomb structure panel. It uses aluminum honeycomb as the core material, with metal or non-metal panels fixed to the upper and lower surfaces of the core material. Of course, the load-bearing core layer 1 can also use honeycomb core materials made of other materials such as paper honeycomb or plastic honeycomb.

[0035] Meanwhile, the load-bearing core layer 1 can also be made of one or more composite materials selected from metal fiber reinforced board, foamed material board, artificial board, stone board, ceramic board, cement substrate, and polymer board; wherein, the fiber reinforced board includes, but is not limited to, glass fiber reinforced board, carbon fiber reinforced board, basalt fiber reinforced board, or wood fiber board; wherein, the artificial board includes, but is not limited to, organic artificial board or inorganic artificial board; wherein, the foamed material board includes, but is not limited to, polyurethane foam board, polystyrene foam board, or PVC foam board, and it can be a solid or skinned structure.

[0036] The heat insulation board 2 is made of polyurethane insulation board, but other insulation materials can also be used.

[0037] The decorative surface layer 5 is made of ceramic tile, but other materials such as wood flooring, stone-plastic flooring, and composite flooring can also be used.

[0038] The edging profile is an aluminum alloy profile.

[0039] See Figures 3 to 7 The prefabricated kitchen and bathroom chassis of this utility model includes multiple base plates spliced ​​together by a splicing structure; the base plate is the base plate of the aforementioned integrated underfloor heating system.

[0040] The splicing structure 8 includes a first base plate splicing body 81 and a second base plate splicing body 82; the first base plate splicing body 81 is integrally provided on the edging profile of one of the two spliced ​​base plates, and the second base plate splicing body 82 is integrally provided on the edging profile of the other base plate; the first base plate splicing body 81 includes a first base plate splicing part 811, the lower end of the first base plate splicing part 811 is integrally connected to the edging profile, and a first base plate splicing slot 812 with an upward opening is formed between the first base plate splicing part 811 and the edging profile; the second base plate splicing body 82 includes a second base plate splicing body 82. The upper end of the second bottom plate splicing part 821 is integrally connected to the edging profile, and the second bottom plate splicing part 821 and the edging profile form a downward-facing second bottom plate splicing slot 822; when two adjacent bottom plates are spliced, the corresponding first bottom plate splicing part 811 is inserted into the corresponding second bottom plate splicing slot 822, and the corresponding second bottom plate splicing part 821 is inserted into the corresponding first bottom plate splicing slot 812 to form an interlocking assembly; the first bottom plate splicing part 811 and the second bottom plate splicing part 821 both extend from one end of the edging profile to the other end.

[0041] The first base plate splicing part 811 located in the first base plate splicing slot 812 has at least one first glue-retaining groove 811a extending along the extension direction of the first base plate splicing part 811; the second base plate splicing part 821 that is in close contact with the first base plate splicing slot 812 has at least one second glue-retaining groove 821a extending along the extension direction of the second base plate splicing part 821. The second base plate splicing body 82 also includes a second abutment 823 located outside the second base plate splicing slot 822 and extending from the upper end of the second base plate splicing part 821 away from the second base plate splicing slot 822; the second abutment 823 extends from one end of the edging profile to the other end; after the two base plates are spliced, the second abutment 823 on one base plate is in close contact with the edging profile of the other base plate that has the first base plate splicing part 811; a first glue filling groove 1a is formed between the second abutment 823, the second base plate splicing part 821 and the edging profile that has the first base plate splicing part 811; A second glue-filling groove 1b is formed between the bottom of the second base plate splicing part 821 and the groove of the first base plate splicing slot 812; The first base plate splicing body 81 also includes a first abutment 813 located outside the first base plate splicing slot 812 and extending from the lower end of the first base plate splicing part 811 away from the first base plate splicing slot 812; the first abutment 813 extends from one end of the edging profile to the other end; after the two base plates are spliced, the first abutment 813 on one base plate is in close contact with the edging profile of the other base plate which has a second base plate splicing part 821; an overflow groove 1c is formed between the first abutment 813, the first base plate splicing part 811 and the edging profile which has a second base plate splicing part 821.

[0042] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A base plate for an integrated underfloor heating system, comprising a bottom substrate surrounded by edge-sealing profiles on all four sides, characterized in that: The bottom substrate comprises, from bottom to top, a load-bearing core layer, a heat insulation board, an aluminum foil reflective film layer, a silicon crystal mesh layer, and a decorative surface layer. The lower end face of the heat insulation board is fixedly connected to the load-bearing core layer, and the upper end face of the heat insulation board is provided with a through-hole for threading heating cables. The aluminum foil reflective film layer covers the upper end face of the heat insulation board and is adapted to fit the upper end face with the through-hole. The silicon crystal mesh layer covers the aluminum foil reflective film layer. The decorative surface layer is fixedly connected to the silicon crystal mesh layer by a decorative adhesive material. The wire inlet and wire outlet of the through-hole are both located on the edge profile of the bottom plate.

2. The base plate of an integrated underfloor heating system according to claim 1, characterized in that: A wire-threading metal pipe is embedded in the threading groove; one end of the wire-threading metal pipe is fixedly connected to the wire-threading inlet on the edge profile of the base plate, and the other end is fixedly connected to the wire-threading outlet on the edge profile of the base plate.

3. The base plate of an integrated underfloor heating system according to claim 2, characterized in that: The wire-threading metal tube is either a corrugated metal tube or a smooth metal tube.

4. The base plate of an integrated underfloor heating system according to claim 1, characterized in that: The load-bearing core layer is a rigid or semi-rigid board; it is made of one or more of the following composite materials: metal board, honeycomb structure board, fiber reinforced board, foamed material board, artificial board, stone board, ceramic board, cement substrate, and polymer board. The honeycomb structure panel includes, but is not limited to, a structure in which one of aluminum honeycomb, paper honeycomb or plastic honeycomb is used as the core material and combined with a metal or non-metal panel. The fiber-reinforced board includes, but is not limited to, one of glass fiber reinforced board, carbon fiber reinforced board, basalt fiber reinforced board or wood fiber board; The engineered wood panels mentioned include, but are not limited to, organic engineered wood panels or inorganic engineered wood panels; The foamed material board includes, but is not limited to, one of polyurethane foam board, polystyrene foam board or PVC foam board, and it can be solid or have a skinned structure.

5. The base plate of an integrated underfloor heating system according to claim 1, characterized in that: The heat insulation board is one of extruded polystyrene board, molded polystyrene board, or polyurethane insulation board.

6. The base plate of an integrated underfloor heating system according to claim 1, characterized in that: The decorative surface layer is one of wood flooring, stone-plastic flooring, composite flooring, or ceramic tile.

7. The base plate of an integrated underfloor heating system according to claim 1, characterized in that: The edging profile is an aluminum alloy profile.

8. A prefabricated chassis, comprising multiple base plates joined together by a splicing structure; characterized in that: The base plate is the base plate of an integrated underfloor heating system as described in any one of claims 1 to 7.

9. The prefabricated chassis according to claim 8, characterized in that: The splicing structure includes a first base plate splicing body and a second base plate splicing body. One of the two base plates is integrally provided with a first base plate splicing body on its edging profile, and the other base plate is integrally provided with a second base plate splicing body on its edging profile. The first base plate splicing body includes a first base plate splicing portion, the lower end of which is integrally connected to the edging profile, forming an upward-opening first base plate splicing slot between the first base plate splicing portion and the edging profile. The second base plate splicing body includes a second base plate splicing portion, the upper end of which is integrally connected to the edging profile, forming a downward-opening second base plate splicing slot between the second base plate splicing portion and the edging profile. When two adjacent base plates are spliced, the corresponding first base plate splicing portion is inserted into the corresponding second base plate splicing slot, and the corresponding second base plate splicing portion is inserted into the corresponding first base plate splicing slot to form an interlocking assembly. Both the first and second base plate splicing portions extend from one end of their respective edging profiles to the other end.

10. The assembled chassis according to claim 9, characterized in that: The first base plate splicing part has at least one first glue-retaining groove extending along the extension direction of the first base plate splicing part on its end face located in the first base plate splicing slot; the second base plate splicing part has at least one second glue-retaining groove extending along the extension direction of the second base plate splicing part on its part that is in close contact with the first base plate splicing slot. The second base plate splicing body also includes a second abutment located outside the second base plate splicing slot and extending from the upper end of the second base plate splicing part away from the second base plate splicing slot; the second abutment extends from one end of the edging profile to the other end; after the two base plates are spliced, the second abutment on one base plate is in close contact with the edging profile of the other base plate that has the first base plate splicing part; a first glue filling groove is formed between the second abutment, the second base plate splicing part and the edging profile that has the first base plate splicing part; A second glue-filling groove is formed between the bottom of the groove of the second base plate splicing part and the groove of the first base plate splicing slot; The first base plate splicing body also includes a first abutment portion located outside the first base plate splicing slot and extending from the lower end of the first base plate splicing portion away from the first base plate splicing slot; the first abutment portion extends from one end of the edging profile to the other end; after the two base plates are spliced, the first abutment portion on one base plate is in close contact with the edging profile of the other base plate which has a second base plate splicing portion; an overflow groove is formed between the first abutment portion, the first base plate splicing portion and the edging profile which has a second base plate splicing portion.