Energy-saving joint structure for prefabricated building units where no glue is needed at the joints of wall panels.

Abstract

This utility model discloses an energy-saving joint structure for the exterior walls of prefabricated building units that eliminates the need for adhesive at the joints of wall panels, belonging to the field of near-zero energy buildings. Each prefabricated unit wall panel has grooved cavities around its perimeter. In horizontal joint units, first and second profiles are fixed within the upper and lower grooved cavities, respectively, with a third profile positioned between them. The combination of various profiles and adhesive strips forms a closed cavity structure. In vertical joint units, a fourth profile is fixed within the left and right grooved cavities. Positioning elements, thermal insulation strips, and a fourth adhesive strip are inserted between the fourth profiles. A third adhesive strip is also fixed opposite to the wall panels to prevent water, air, and wind from entering. This utility model's joint structure improves upon the traditional joint structure that requires adhesive at the wall panel joints, while still achieving good airtightness and watertightness, and also exhibiting good wind pressure resistance.

Description

Technical Field

[0001] This utility model belongs to the field of near-zero energy buildings, specifically relating to an energy-saving joint structure for the exterior walls of prefabricated building units that does not require adhesive at the joints of wall panels. Background Technology

[0002] Developing near-zero energy buildings is crucial for environmental protection. It effectively reduces greenhouse gas emissions and air pollution, significantly improves energy efficiency, and vigorously promotes the development of renewable energy. In addition, near-zero energy buildings bring numerous socio-economic benefits, such as reducing building operating costs, promoting the development of the green building industry, improving residents' quality of life, creating a comfortable, healthy, and safe living environment, enhancing residents' environmental awareness, and jointly promoting sustainable social development.

[0003] In the construction of near-zero energy buildings, the joint treatment of prefabricated exterior wall panels is a crucial process that directly affects the building's energy efficiency and performance. Currently, the industry commonly employs various joint treatment methods, including using high-performance sealing materials for precise filling, installing robust structural columns, applying highly airtight membranes to enhance airtightness, using non-shrink epoxy structural adhesives to ensure joint stability and sealing, and filling with high-efficiency insulation materials when necessary to improve the building's thermal insulation capabilities. While these methods have achieved some success in practice, they still face numerous challenges, including but not limited to difficulties in fully guaranteeing airtightness at the joints, damage to insulation performance due to improper treatment, and unsatisfactory waterproofing effects.

[0004] For the cross joints of precast exterior wall panels, in addition to meeting the basic requirements of waterproofing, sealing, and preventing outdoor heat from entering or transferring into the room, the ease and reliability of structural assembly must also be considered. However, existing technologies cannot fully meet these requirements. Therefore, there is an urgent need to design a more scientific and reasonable assembly joint structure for the cross joints of precast exterior wall panels. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an energy-saving joint structure for the exterior walls of prefabricated building units that does not require glue at the joints of wall panels.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] This utility model provides an energy-saving joint structure for the exterior wall of prefabricated building units that does not require glue at the joints of wall panels. The joint structure includes vertical joint units and horizontal joint units, which are used to connect two adjacent prefabricated unit wall panels on the top and bottom and two adjacent prefabricated unit wall panels on the left and right, respectively. Each prefabricated unit wall panel has a groove cavity on all four sides.

[0008] In the horizontal splicing unit, a first profile and a second profile are fixed in the groove cavities of the upper and lower prefabricated unit wall panels, respectively. The first profile is formed by connecting an aluminum channel with a first groove and an aluminum channel with a second and a third groove as a whole through a thermal break structure. The second profile is formed by connecting two aluminum channels with the same structure and protrusions as a whole through a thermal break structure. The two protrusions of the second profile are respectively inserted into the first and second grooves of the first profile. The protrusions inserted into the first and second grooves also have grooves for setting the first adhesive strip. Several sections of the third profile are also set in the cavity where the first and second profiles are spliced. A closed-cell adhesive strip is set in the cavity between the first and second profiles. A second adhesive strip is also set between the upper and lower prefabricated unit wall panels.

[0009] In the vertical splicing unit, a fourth profile is fixed in the groove cavity of both the left and right prefabricated unit wall panels. The fourth profile consists of two aluminum channels, each with a fifth and a sixth groove, connected as a whole by a thermal break structure. A thermal insulation strip is inserted into the sixth groove on one side, and a fourth adhesive strip is inserted into the sixth groove on the other side. The thermal insulation strip is inserted into the fourth adhesive strip to form a sealed connection. A third adhesive strip is also fixed between the left and right prefabricated unit wall panels. The third adhesive strip includes protruding parts on both sides and a fixing part in the middle. The protruding parts of the third adhesive strip between the left and right prefabricated unit wall panels are in close contact to prevent water and air from entering.

[0010] Preferably, the second adhesive strip is disposed throughout the third groove of the first profile. The second adhesive strip includes a second adhesive strip protrusion and a second adhesive strip extension. The second adhesive strip protrusion is inserted into the third groove, and the second adhesive strip extension extends outward and is fixedly connected to the prefabricated unit wall panel.

[0011] Preferably, the second adhesive strip is fixed along its length between the upper and lower prefabricated unit wall panels; the second adhesive strip includes second adhesive strip protrusions on both sides and a second adhesive strip fixing part in the middle; the second adhesive strip fixing part is fixedly connected to the prefabricated unit wall panel by bolt connection, and the second adhesive strip protrusions on both sides abut against the upper and lower prefabricated unit wall panels to prevent water and air from entering.

[0012] Preferably, sealant is pre-applied at the junction of the horizontal and vertical splicing units, and at the connection points of the first, second, and fourth profiles.

[0013] Preferably, each prefabricated unit wall panel consists of an interior layer, an insulation layer, an outer panel, and an exterior finish, arranged from the inside out; the groove cavity is located in the insulation layer, and the groove cavity is also provided with an inner frame for the outer wall panel.

[0014] Furthermore, the first profile is fixedly connected to the inner frame of the outer wall panel in the upper prefabricated unit wall panel by screws; the second profile is fixedly connected to the inner frame of the outer wall panel in the lower prefabricated unit wall panel by tie rods; and the fourth profile is fixedly connected to the inner frame of the outer wall panel in the prefabricated unit wall panels on the left and right sides by screws.

[0015] Furthermore, the second adhesive strip extension is fixedly connected to the outer panel of the prefabricated unit wall panel by bolts, and the second adhesive strip extension is also provided with a second adhesive strip barrier to prevent water and air from entering.

[0016] Furthermore, the third adhesive strip fixing part is fixedly connected to the outer panel of the prefabricated unit wall panel by bolts; heat insulation felt is provided around the inner frame of the outer wall panel.

[0017] Preferably, a number of positioning elements are provided in the fifth groove of the fourth profile to guide the construction and installation and increase the strength of the lateral joints; no less than two positioning elements are provided between two adjacent prefabricated unit wall panels on the left and right.

[0018] Furthermore, the positioning component is made of aluminum insert and is fixedly connected to the fourth profile by bolt connection.

[0019] Preferably, elastic gaskets are provided between the first profile, the second profile, and the fourth profile and the groove cavity of the prefabricated unit wall panel.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] (1) Excellent thermal insulation performance: The splicing structure provided by this utility model can effectively block heat conduction, significantly improve building energy efficiency, reduce energy consumption, help maintain a constant and comfortable internal temperature of the building, and reduce dependence on external energy.

[0022] (2) Sealing and stability: The joint structure provided by this utility model abandons the traditional joint sealing method and performs well in terms of air tightness and water tightness. It can strictly prevent the penetration of air and moisture, ensure the stable and dry internal environment of the building, and has strong resistance to displacement and wind pressure, ensuring the building is stable and safe under various external forces.

[0023] (3) Easy installation: Compared with traditional materials and technologies, this utility model avoids the tedious and time-consuming glue application process, making the installation process simpler and more convenient. It can greatly improve construction efficiency, shorten the construction period, and reduce construction costs, making it more competitive and advantageous in the field of ultra-low energy consumption or near-zero energy consumption buildings. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall installation of the energy-saving splice structure of the prefabricated building unit exterior wall provided in this embodiment;

[0025] Figure 2 This is a schematic diagram of the groove cavity in the transverse splice unit of this embodiment;

[0026] Figure 3 This is a schematic diagram of the profile installation in the horizontal splicing unit of this embodiment;

[0027] Figure 4 This is a schematic diagram of the installation of the adhesive strip in the transverse splice unit of this embodiment;

[0028] Figure 5 This is a schematic diagram of the first profile provided in this embodiment;

[0029] Figure 6 This is a schematic diagram of the second profile provided in this embodiment;

[0030] Figure 7 This is a schematic diagram of the third profile provided in this embodiment;

[0031] Figure 8 This is a schematic diagram of the second adhesive strip provided in this embodiment;

[0032] Figure 9 This is a schematic diagram of another type of second adhesive strip installation according to this utility model;

[0033] Figure 10 This is a schematic diagram of the profile installation in the vertical splice unit of this embodiment;

[0034] Figure 11 This is a schematic diagram of the installation of the adhesive strip in the vertical splice unit of this embodiment;

[0035] Figure 12 This is a schematic diagram of the fourth profile provided in this embodiment;

[0036] Figure 13 This is a schematic diagram of the third adhesive strip provided in this embodiment;

[0037] In the diagram: First profile 1, First groove 101, Second groove 102, Third groove 103, Thermal insulation structure 104, Second profile 2, Protrusion structure 201, Third profile 3, Fourth profile 4, Fifth groove 401, Sixth groove 402, First adhesive strip 5, Second adhesive strip 6, Second adhesive strip protrusion 601, Second adhesive strip extension 602, Second adhesive strip barrier 603, Third adhesive strip 7, Third adhesive strip protrusion 701, Third adhesive strip fixing part 702, Fourth adhesive strip 8, Closed-cell adhesive strip 9, Thermal insulation strip 10, Positioning component 11, Thermal insulation felt 12, Elastic gasket 13, Inner frame of outer wall panel 14, Groove cavity 15, Interior layer 16, Thermal insulation layer 17, Outer leaf plate 18, Exterior finish 19. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0039] In the description of this utility model, it should be understood that the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include at least one of those features.

[0040] As a preferred embodiment of this utility model, this embodiment provides an energy-saving joint structure for the exterior wall of prefabricated building units where adhesive is not required at the joints of the wall panels. This joint structure includes vertical joint units and horizontal joint units, which are used to connect two adjacent prefabricated unit wall panels (upper and lower) and two adjacent prefabricated unit wall panels (left and right), respectively. The prefabricated unit wall panels used in this utility model are all prefabricated finished wall panels, which, from the inside out, consist of an interior layer 16, an insulation layer 17, an outer panel 18, and an exterior finish 19. Figure 1 As shown, the inner side of the prefabricated unit wall panel is fixedly connected to the building's interior floor slab in multiple places through connecting brackets.

[0041] In this utility model, each prefabricated unit wall panel has a recessed cavity 15 around its four sides. The recessed cavity 15 is disposed in the insulation layer 17, and the recessed cavity 15 also houses the inner frame 14 of the outer wall panel. To improve the thermal insulation performance, in this embodiment, a heat insulation felt 12 is also provided in the gap between the inner frame 14 of the outer wall panel and the outer panel 18, specifically as follows: Figure 2 As shown.

[0042] In the horizontal splicing unit provided by this utility model, a first profile 1 and a second profile 2 are respectively fixed in the groove cavity 15 of the upper and lower prefabricated unit wall panels. The first profile 1 used in this embodiment is as follows: Figure 5 As shown. The first profile 1 is composed of two aluminum channels of different shapes connected into a whole by a heat insulation structure 104. One aluminum channel has a first groove 101 for inserting the second profile 2, and the other aluminum channel has a second groove 102 for inserting the second profile 2 and a third groove 103 for continuously mounting the second adhesive strip 6. The second adhesive strip 6 used in this embodiment is as follows: Figure 8 As shown. The second adhesive strip 6 includes a second adhesive strip protrusion 601 and a second adhesive strip extension 602. The second adhesive strip protrusion 601 is inserted into the third groove 103 of the first profile 1, and the second adhesive strip extension 602 extends outward and is fixedly connected to the outer panel 18 of the prefabricated unit wall panel by bolts. The second adhesive strip extension 602 also has a second adhesive strip barrier 603 to prevent water and air from entering.

[0043] It should be noted that, in other embodiments, the following methods may also be used: Figure 9 The method for setting the second adhesive strip 6 is shown. For example... Figure 9 As shown, the second adhesive strip 6 is fixed along its length between the outer panels 18 of the upper and lower prefabricated unit wall panels. The second adhesive strip 6 includes second adhesive strip protrusions on both sides and a second adhesive strip fixing part in the middle; the second adhesive strip fixing part is fixedly connected to the outer panel 18 of the prefabricated unit wall panel by bolt connection, and the second adhesive strip protrusions on both sides abut against the upper and lower prefabricated unit wall panels to prevent water and air from entering.

[0044] The second profile 2 used in this embodiment is as follows: Figure 6 As shown. The second profile 2 is composed of two identical aluminum channels connected as a whole by a heat insulation structure 104. Each aluminum channel is provided with a protruding structure 201 for inserting the first groove 101 and the second groove 102 of the first profile 1. The protruding structure 201 is also provided with a groove for the continuous placement of the first adhesive strip 5.

[0045] like Figure 3 As shown, in this embodiment, the first profile 1 is fixedly connected to the inner frame 14 of the outer wall panel in the upper prefabricated unit wall panel by screws. The second profile 2 is fixedly connected to the inner frame 14 of the outer wall panel in the lower prefabricated unit wall panel by tie rods. Elastic gaskets 13 are provided between the first profile 1, the second profile 2 and the groove cavity 15 of the prefabricated unit wall panel to prevent bimetallic oxidation or corrosion. It should be noted that in this embodiment, at the junction of the horizontal splicing unit and the vertical splicing unit, sealant is pre-applied at the connection of the first profile 1, the second profile 2 and the fourth profile 4 to ensure the airtightness and watertightness of the splice. Those skilled in the art can select a suitable sealant according to the actual working conditions.

[0046] In this embodiment, a third profile 3 is further segmented within the cavity where the first profile 1 and the second profile 2 are joined. The third profile 3 is specifically as follows... Figure 7 As shown, each end of the profile has a portion that abuts against the protruding structure 201 on the second profile 2, further preventing external water and air from entering. A closed-cell adhesive strip 9 is also provided in the cavity between the first profile 1 and the second profile 2. At the location where the third profile 3 is located, the closed-cell adhesive strip 9 is positioned on the third profile 3, between the first profile 1 and the third profile 3, as shown. Figure 4As shown. At the location where the third profile 3 is not installed, the closed-cell adhesive strip 9 is directly installed between the first profile 1 and the second profile 2, as shown. Figure 9 As shown.

[0047] In the vertical splicing unit provided by this utility model, a fourth profile 4 is fixed in the groove cavity 15 of both the left and right prefabricated unit wall panels, specifically as follows: Figure 10 As shown.

[0048] The fourth profile 4 provided in this embodiment is as follows: Figure 12 As shown. The fourth profile 4 is composed of two aluminum channels with the same structure connected into a whole by a heat insulation structure 104. Each aluminum channel is provided with a fifth groove 401 for inserting the positioning member 11 and a sixth groove 402 for inserting the heat insulation strip 10 and the fourth adhesive strip 8.

[0049] like Figure 10 As shown, the fourth profile 4 is fixedly connected to the inner frame 14 of the outer wall panel in the prefabricated unit wall panel on both sides by screws. An elastic gasket 13 is also provided between the fourth profile 4 and the groove cavity 15 of the prefabricated unit wall panel. A positioning element 11 is provided in the fifth groove 401, which guides the construction and installation and increases the strength of the lateral joint. The positioning element 11 can be made of aluminum insert. To further increase the connection strength, the positioning elements 11 are all fixedly connected to the fourth profile 4 by bolts.

[0050] In this embodiment, the installation of the adhesive strip in the vertical seam unit is as follows: Figure 11 As shown. A heat insulation strip 10 is inserted into the sixth groove 402 on one side, and a fourth adhesive strip 8 is inserted into the sixth groove 402 on the other side. The heat insulation strip 10 is inserted into the fourth adhesive strip 8 to form a sealed connection; a third adhesive strip 7 is also fixedly installed between the left and right prefabricated unit wall panels. The third adhesive strip 7 provided in this embodiment is as follows... Figure 13 As shown, the third adhesive strip 7 includes protruding portions 701 on both sides and a fixing portion 702 in the middle. The fixing portion 702 is fixedly connected to the outer panel 18 of the prefabricated unit wall panel by bolts. The protruding portions 701 of the third adhesive strip between the left and right prefabricated unit wall panels are in close contact to prevent water and air from entering.

[0051] The splicing structure provided by this invention improves upon the traditional splicing structure that requires adhesive at the joints of wall panels, while still achieving good airtightness, watertightness, and windtightness. This invention uses more environmentally friendly and sustainable materials and technologies to replace the traditional adhesive method. These new materials and technologies not only have lower carbon emissions and less environmental impact, but also better meet the high energy efficiency requirements of ultra-low energy or near-zero energy buildings.

[0052] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A prefabricated building unit exterior wall energy-saving joint structure that eliminates the need for adhesive at wall panel joints, characterized in that, The joint structure includes vertical joint units and horizontal joint units. The horizontal joint units and vertical joint units are used to connect two adjacent prefabricated unit wall panels on the top and bottom and two adjacent prefabricated unit wall panels on the left and right, respectively. Each prefabricated unit wall panel has a groove cavity (15) on all four sides. In the horizontal splicing unit, the first profile (1) and the second profile (2) are fixed in the groove cavity (15) of the upper and lower prefabricated unit wall panels respectively; the first profile (1) is formed by connecting an aluminum channel with a first groove (101) and an aluminum channel with a second groove (102) and a third groove (103) through a heat insulation structure (104) into a whole; the second profile (2) is formed by connecting two aluminum channels with the same structure and with a protrusion structure (201) through a heat insulation structure (104) into a whole; the two protrusion structures of the second profile (2) (201) Insert the first groove (101) and the second groove (102) of the first profile (1) respectively. The protruding structure (201) of the first groove (101) and the second groove (102) is also provided with a groove for setting the first adhesive strip (5). Several sections of third profile (3) are also provided in the cavity where the first profile (1) and the second profile (2) are spliced. A closed-cell adhesive strip (9) is also provided in the cavity between the first profile (1) and the second profile (2). A second adhesive strip (6) is also provided between the upper and lower prefabricated unit wall panels. In the vertical splicing unit, a fourth profile (4) is fixed in the groove cavity (15) of the left and right prefabricated unit wall panels. The fourth profile (4) is formed by two aluminum grooves with the same structure, each with a fifth groove (401) and a sixth groove (402), connected as a whole by a heat insulation structure (104). A heat insulation strip (10) is inserted into the sixth groove (402) on one side, and a fourth adhesive strip (8) is inserted into the sixth groove (402) on the other side. The heat insulation strip (10) is inserted into the fourth adhesive strip (8) to form a sealed connection. A third adhesive strip (7) is also fixed between the left and right prefabricated unit wall panels. The third adhesive strip (7) includes a third adhesive strip protrusion (701) on both sides and a third adhesive strip fixing part (702) in the middle. The third adhesive strip protrusion (701) between the left and right prefabricated unit wall panels is in close contact to prevent water and air from entering.

2. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, The second adhesive strip (6) is disposed in the third groove (103) of the first profile (1) along its length. The second adhesive strip (6) includes a second adhesive strip protrusion (601) and a second adhesive strip extension (602). The second adhesive strip protrusion (601) is inserted into the third groove (103), and the second adhesive strip extension (602) extends outward and is fixedly connected to the prefabricated unit wall panel.

3. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 2, characterized in that, The second adhesive strip extension (602) is fixedly connected to the outer panel (18) of the prefabricated unit wall panel by bolts. The second adhesive strip extension (602) is also provided with a second adhesive strip barrier (603) to prevent water and air from entering.

4. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, The second adhesive strip (6) is fixed along its length between the upper and lower prefabricated unit wall panels; the second adhesive strip (6) includes the second adhesive strip protrusions on both sides and the second adhesive strip fixing part in the middle; the second adhesive strip fixing part is fixedly connected to the prefabricated unit wall panel by bolt connection, and the second adhesive strip protrusions on both sides abut against the upper and lower prefabricated unit wall panels to prevent water and air from entering.

5. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, At the junction of the horizontal and vertical splicing units, sealant is pre-applied to the connection of the first profile (1), the second profile (2), and the fourth profile (4).

6. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, Each prefabricated unit wall panel consists of an interior layer (16), an insulation layer (17), an outer panel (18), and an exterior finish (19) from the inside out; the groove cavity (15) is provided in the insulation layer (17), and the groove cavity (15) is also provided with an inner frame (14) of the outer wall panel.

7. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 6, characterized in that, The first profile (1) is fixedly connected to the inner frame (14) of the outer wall panel in the upper prefabricated unit wall panel by screws; the second profile (2) is fixedly connected to the inner frame (14) of the outer wall panel in the lower prefabricated unit wall panel by tie rods; the fourth profile (4) is fixedly connected to the inner frame (14) of the outer wall panel in the prefabricated unit wall panels on the left and right sides by screws.

8. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 6, characterized in that, The third adhesive strip fixing part (702) is fixedly connected to the outer panel (18) of the prefabricated unit wall panel by bolt connection; the outer frame (14) of the outer wall panel is provided with heat insulation felt (12).

9. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, Several positioning elements (11) are provided in the fifth groove (401) of the fourth profile (4) to guide the construction and installation and increase the strength of the lateral joint; no less than two positioning elements (11) are provided between two adjacent prefabricated unit wall panels on the left and right; preferably, the positioning elements (11) are made of aluminum inserts and are fixedly connected to the fourth profile (4) by bolt connection.

10. The energy-saving joint structure for the exterior wall of prefabricated building units according to claim 1, characterized in that, Elastic gaskets (13) are provided between the first profile (1), the second profile (2) and the fourth profile (4) and the groove cavity (15) of the prefabricated unit wall panel.

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