PVC (polyvinyl chloride) multi-cavity structural member and profile

Abstract

The invention discloses a PVC (polyvinyl chloride) multi-cavity structural member and a profile, the PVC multi-cavity structural member comprises: a member main body provided with a plurality of cavities; the buckling part is arranged on one side of the lower side surface of the component main body and is matched with the mounting part; the first contact face is arranged on the left side face of the component body and attached to the installation position. The second contact surface is arranged on the upper side surface of the component main body; the third contact surface is arranged on the lower side surface of the component main body; the wrapping strip notch is formed in one side of the upper side face of the component main body; and the PU coating strip is arranged in the coating strip notch. According to the invention, the overlap amount between the frames and the sashes can be increased, the height of a cavity between the frames and the sashes is reduced, air heat convection and heat conduction between the indoor side and the outdoor side are further blocked, and the thermal insulation performance of the whole window is enhanced; four sealing structures can be achieved, and the sealing performance, the sound insulation performance and the water sealing performance of the whole window are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of profiles, and in particular relates to a PVC multi-cavity structural part and a profile. Background Art

[0002] As an important part of the building's exterior envelope, plastic steel doors and windows have thermal and sealing properties that directly affect the building's energy consumption and user experience.

[0003] Traditional plastic-steel profiles mostly adopt a single-cavity or double-cavity structure with a three-sealing design, which exposes the following technical bottlenecks in actual application:

[0004] First, the overlap of the frame and sash is limited by the cross-section of the profile and is difficult to effectively increase, resulting in the indoor and outdoor air heat convection path not being fully blocked, and the heat transfer coefficient of the whole window is generally higher than 1.8W / (m 2 K), it is difficult to meet the requirements of ultra-low energy consumption buildings;

[0005] Secondly, the cavity height between the isobaric chamber and the main sealing chamber is too large (usually >15mm), forming a significant thermal bridge effect. Thermal imaging tests show that the temperature difference in this area can reach 8-10°C.

[0006] Furthermore, the national standard molding grooves of traditional frame profiles lack an effective shielding structure, which makes it easy for dust to accumulate and difficult to clean after long-term use, affecting the service life of the sealing strips. Summary of the Invention

[0007] In view of this, the main purpose of the present invention is to provide a PVC multi-cavity structural member and profile.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0009] A PVC multi-cavity structural component, comprising:

[0010] The component body is provided with a plurality of cavities;

[0011] The buckle portion is provided on one side of the lower side of the component body and is provided in cooperation with the installation portion;

[0012] The first contact surface is provided on the left side of the component body and is arranged in contact with the installation position;

[0013] A second contact surface is provided on the upper side of the component body;

[0014] a third contact surface, provided on the lower side of the component body;

[0015] a covering strip notch provided on one side of the upper side of the component body;

[0016] The PU covering strip is arranged in the covering strip notch.

[0017] Preferably, the snap-fit ​​portion is a snap-fit ​​boss.

[0018] Preferably, the first contact surface includes a first contact sub-surface, a second contact sub-surface, and a third contact sub-surface, and the first contact sub-surface, the second contact sub-surface, and the third contact sub-surface are arranged continuously in sequence from the snap portion to the left side of the component body.

[0019] Preferably, a groove portion is further included, which is arranged on the lower side of the component body close to the side of the buckle portion.

[0020] Preferably, a first cavity, a second cavity and a third cavity are arranged in intervals in the component body.

[0021] Preferably, a first mounting rib and a second mounting rib are respectively provided on the left and right sides of the covering strip notch.

[0022] Preferably, a PVC support piece is provided at the bottom of the PU covering strip.

[0023] A profile includes a plastic-steel fan profile, a plastic-steel frame profile, and a PVC multi-cavity structural member. The plastic-steel fan profile and the plastic-steel frame profile are connected in cooperation, and the PVC multi-cavity structural member is arranged in a cavity formed between the plastic-steel fan profile and the plastic-steel frame profile.

[0024] Preferably, the snap-fit ​​portion of the PVC multi-cavity structural member is snapped into the national standard frame strip groove of the plastic-steel frame profile; the first contact surface abuts against the outer support of the plastic-steel frame profile, and the groove portion is cooperated with the inner support of the plastic-steel frame profile.

[0025] Compared with the prior art, the present invention can increase the overlap between the frames and sashes, reduce the height of the cavity between the frames and sashes, further block the air heat convection and heat conduction between the indoor and outdoor sides, and enhance the thermal insulation performance of the entire window; the present invention can realize a four-sealing structure, thereby improving the overall sealing performance, sound insulation performance, and watertightness performance of the entire window. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings described herein are used to further understand the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 A schematic structural diagram of a PVC multi-cavity structural member is provided for an embodiment of the present invention;

[0028] Figure 2 A structural schematic diagram of a profile is provided for an embodiment of the present invention.

[0029] Figure 3 A temperature diagram of a profile is provided for an embodiment of the present invention.

[0030] Figure 4 A temperature field diagram of a profile is provided for an embodiment of the present invention.

[0031] Figure 5 This is the temperature line diagram of traditional profiles.

[0032] Figure 6 This is a traditional temperature field diagram. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, article, or device comprising the element.

[0036] The embodiment of the present invention provides a PVC multi-cavity structural member, such as Figure 1 As shown, including:

[0037] The component body 1 is provided with a plurality of cavities;

[0038] The buckle portion 2 is provided on one side of the lower side of the component body 1 and is provided in cooperation with the installation portion;

[0039] The first contact surface 3 is provided on the left side of the component body 1 and is fitted with the installation position;

[0040] The second contact surface 4 is provided on the upper side of the component body 1;

[0041] The third contact surface 5 is provided on the lower side of the component body 1;

[0042] The covering strip notch 6 is provided on one side of the upper side of the component body 1;

[0043] The PU covering strip 7 is arranged in the covering strip notch 6 .

[0044] The present invention can increase the overlap between the frame and the sash, reduce the height of the cavity between the frame and the sash, further block the air heat convection and heat conduction between the indoor and outdoor sides, and enhance the thermal insulation performance of the entire window;

[0045] After the application of this energy-saving sealing reinforcement component, the frame drainage area is higher inside and lower outside, with a large height difference, further enhancing the waterproof performance of the entire window;

[0046] After the energy-saving sealing reinforcement component is applied, dust and debris can be prevented from accumulating in the frame groove, making it easy to clean and making the entire window neat and beautiful.

[0047] The component body 1 is formed from PVC-U profiles through an extrusion die. Its cross-section features a multi-cavity, "S"-shaped structure, comprising three parallel, enclosed chambers (8-12mm in diameter) with walls 1.5-2.0mm thick. This structure reduces material usage by 30% while maintaining longitudinal rigidity. Finite element analysis has verified a flexural modulus of 1200 MPa.

[0048] Furthermore, the snap-fit ​​portion 2 is a snap-fit ​​boss.

[0049] Furthermore, the first contact surface 3 includes a first contact sub-surface 31, a second contact sub-surface 32, and a third contact sub-surface 33, and the first contact sub-surface 31, the second contact sub-surface 32, and the third contact sub-surface 33 are continuously arranged in sequence from the buckle portion 2 to the left side of the component body 1.

[0050] Furthermore, a groove portion 8 is included, which is provided on the lower side of the component body 1 close to the buckle portion 2.

[0051] The groove portion 8 forms a stress release channel, which reduces the stress concentration coefficient of the clamping part from 2.1 to 1.3. At the same time, it serves as a condensed water diversion channel. According to tests, the drainage efficiency is improved by 40%.

[0052] Furthermore, a first cavity 11 , a second cavity 12 , and a third cavity 13 are spaced apart in the component body 1 .

[0053] Furthermore, a first mounting rib 61 and a second mounting rib 62 are respectively provided on the left and right sides of the covering strip notch 6 .

[0054] Furthermore, since the PU covering strip 7 is made of a very flexible material, its bottom surface cannot directly contact the installation contact surface and cannot support the surface. Therefore, a PVC support member 71 is provided at the bottom of the PU covering strip 7 .

[0055] The PVC support member 71 has a high hardness and its main function is to support the PU covering strip 7 to ensure that the PU covering strip 7 will not be deformed due to repeated and long-term opening and closing of the entire window.

[0056] The material of the PU covering strip 7 is mainly polyurethane, which has the characteristics of wear resistance and aging resistance, high elasticity and resilience, environmental protection, dustproof, dryness-proof, waterproof and the like.

[0057] The PU covering strip 7 is installed at the covering strip notch 6, and the PVC support member 71 is tightly fitted to the installation contact surface.

[0058] The embodiment of the present invention further provides a profile, such as Figure 2 As shown, it includes a plastic-steel fan profile 9, a plastic-steel frame profile 10, and a PVC multi-cavity structural member. The plastic-steel fan profile 9 and the plastic-steel frame profile 10 are connected in cooperation, and the PVC multi-cavity structural member is arranged in a cavity 91 formed between the plastic-steel fan profile 9 and the plastic-steel frame profile 10.

[0059] The cavity 91 is the area between the fan contact surface 92 of the plastic-steel fan profile 9 and the frame contact surface 101 of the plastic-steel frame profile 10 .

[0060] The plastic-steel fan profile 9 and the plastic-steel frame profile 10 are respectively provided with a fan sealing strip 102, an isobaric water-retaining strip 106, and a frame sealing strip 107;

[0061] The sash sealing strip 102 , the isobaric water-retaining strip 106 , and the frame sealing strip 107 form a three-layer sealing structure of the plastic-steel window.

[0062] Traditional window profiles without PVC multi-cavity components easily accumulate dust and are difficult to clean at the frame national standard molding notches 103 and frame contact surfaces 101. After installing the PVC multi-cavity components, the component body 1 completely covers the frame national standard molding notches 103 and frame contact surfaces 101, allowing dust to accumulate on the second contact surface 4, making it easier to clean.

[0063] The snap-on portion 2 of the PVC multi-cavity structural member is snapped into the national standard frame strip groove 103 of the plastic-steel frame profile 10; the first contact surface 3 abuts against the outer support 105 of the plastic-steel frame profile 10, and the groove portion 8 is cooperated with the inner support 104 of the plastic-steel frame profile 10.

[0064] Specifically, the first contact sub-surface 31 and the second contact sub-surface 32 are tightly fitted with the outer support 105, thereby enhancing the dustproof effect of the national standard molding notch 103 of the frame, and ensuring the sealing and aesthetics of the energy-saving sealing enhancement structure of the opening fan.

[0065] The second contact surface 4 is higher than the frame contact surface 91, and the frame drainage is higher inside and lower outside, with a large height difference. This can further prevent the problem of rainwater backflow caused by aging and breakage of the equal pressure water retaining strip 96 of the entire window, thereby enhancing the waterproof performance of the entire window.

[0066] In addition, the third contact surface 5 and the frame contact surface 101 are on the same plane. When the window sash is closed, the sash sealing strip 102 overlaps with the plastic-steel frame profile 10 and the PVC multi-cavity structural member, which increases the overlap width of the sash sealing strip 102 and improves the overall sealing performance of the plastic-steel window sash.

[0067] Furthermore, the third contact surface 5 and the frame contact surface 101 are on the same plane. Under the action of the buckle part 2, the two planes fit tightly together, which enhances the stability of the energy-saving sealing reinforcement structure of the opening fan and the dust-proof effect of the frame contact surface 101, making it easier to clean.

[0068] The top of the PU covering strip 7 of the PVC multi-cavity structural member abuts against the fan contact surface 92 of the plastic-steel fan profile 9, forming the fourth sealing structure of the plastic-steel window.

[0069] The PU covering strip 7 is provided to separate the cavity 91 into two cavities, thereby further ensuring various performance indicators of the plastic-steel window (water tightness, air tightness, sound insulation, and thermal insulation performance).

[0070] After the PVC multi-cavity structural member is installed, the distance of the cavity 91 changes from the distance between the fan contact surface 92 and the frame contact surface 101 to the distance between the second contact surface 4 and the fan contact surface 92. The distance of the cavity 91 is significantly reduced, and the overlap of the frame and fan is significantly increased, further blocking the air heat convection and heat conduction between the indoor and outdoor spaces, thereby improving the thermal performance of the entire window.

[0071] The groove portion 8 also allows the PVC multi-cavity structural member to avoid the inner pillar 104 as a whole, and there is no need to perform a milling process on the inner pillar 105 for easy installation.

[0072] Furthermore, by aligning the installed hardware with the second contact surface 4 , a hardware embedded design can be achieved, thereby enhancing the aesthetics of the entire window.

[0073] In the embodiment, the plastic-steel window using the PVC multi-cavity structural member is subjected to professional thermal calculation (according to the "Regulations for Thermal Calculation of Building Doors, Windows and Glass Curtain Walls" JGJ / T151-2008), and its key performance indicators are as follows:

[0074] 1. Thermal performance of the entire window

[0075]

[0076] 2. Condensation performance verification

[0077]

[0078]

[0079] The effect of the four-line sealing of the present invention on blocking edge thermal bridges is quantitatively verified by the linear heat transfer coefficient (ψ=0.07-0.077 W / (m·K)).

[0080] Calculations show that the condensate diversion rate increases by 40%, which creates a synergistic effect with the decrease in the cross-sectional stress concentration factor (2.1→1.3).

[0081] After finite element simulation and actual engineering verification, the heat transfer coefficient of the plastic steel window using the present invention is reduced to 1.55W / (m 2 ·K) below, energy saving rate is increased by 22%-25% compared with traditional single-chamber structure windows.

[0082] like Figure 3 As shown in the temperature line diagram of the profile of the present invention, the temperature gradient distribution of the profile cross section is presented in the form of isotherms. The indoor and outdoor temperatures are set to 20°C (indoor) and -20°C (outdoor), and the convection heat transfer coefficients are 3.60W / (m 2 ·K) and 16.00W / (m 2 The isotherms are densely distributed in the main body of the component, indicating that the temperature gradient in this area is significantly increased, verifying that the multi-cavity structure and PU coating strips effectively block the heat conduction path. The calculated heat transfer coefficient U value is 1.645W / (m 2 ·K), the linear heat transfer coefficient is 0.077W / (m·K), and the thermal insulation performance is improved by 2.4% compared with traditional profiles.

[0083] like Figure 4 As shown, the temperature field diagram of the profile of the present invention displays the overall temperature distribution of the profile cross section through colors or contour lines. It shows that a clear temperature transition zone is formed between the indoor side (high temperature zone) and the outdoor side (low temperature zone), and the temperature stratification in the cavity part is significant, which verifies the thermal bridge blocking effect of the four-sealed structure. The temperature change in the frame and sash overlap area is gentle, and the minimum inner surface temperature is maintained above 9.2°C, meeting the anti-condensation requirements (when the humidity is ≤60%). The data table shows that the total sunlight transmittance g value is reduced to 0.026, indicating that the cavity segmentation design has advantages in reducing radiation heat transfer.

[0084]

[0085] like Figure 5As shown in the figure, the temperature line diagram of the traditional profile shows the temperature gradient distribution of the profile cross section in the form of isotherms. The indoor and outdoor temperatures are set to 20℃ (indoor) and -20℃ (outdoor). The isotherms are sparsely distributed in the frame-sash overlap area, indicating that the traditional single-cavity structure leads to a smooth heat transfer path and a gentle temperature gradient. The frame-sash cavity area (height>15mm) forms a clear isotherm straight section, verifying the presence of a significant thermal bridge effect in this area. The heat transfer coefficient U value reaches 1.684W / (m 2 ·K), which is 0.039W / (m 2 The linear heat transfer coefficient of 0.077 W / (m·K) is the same as that of the present invention, but combined with the larger cavity size, the actual heat loss increases by about 18%.

[0086] like Figure 6 As shown in the temperature field diagram of the traditional profile, a continuous high-temperature zone (about -5°C to 5°C) is formed between the inner and outer pillars of the frame profile, indicating that the steel reinforcement ribs are directly exposed to the cavity, resulting in a prominent metal thermal bridge effect. The temperature stratification in the central area of ​​the cavity is not obvious, and the area of ​​the active heat convection area accounts for 65%, which is much higher than the 38% of the profile of the present invention. The lowest inner surface temperature is only 8.9°C (20°C indoors / -20°C outdoor working conditions), which is 0.3°C lower than that of the present invention, and the condensation risk is increased by 15%. The temperature fluctuation range of the isobaric cavity area is as high as 12°C (-18°C to -6°C), reflecting that air convection intensifies heat exchange.

[0087]

[0088] Comparing the present invention with traditional profiles, when the lengths of the window frame and sash are consistent and the direction of gravity is the same, the isothermal lines on the temperature diagram at the node of the component using the present invention are more densely packed, indicating that the use of this component reduces heat conduction and convection between the frame and sash. Furthermore, the heat transfer coefficient of the node diagram of the door and window using this component is improved by 2.4%.

[0089] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A PVC multi-cavity structural member, characterized in that: include: The component body is provided with a plurality of cavities; The buckle portion is provided on one side of the lower side of the component body and is provided in cooperation with the installation portion; The first contact surface is provided on the left side of the component body and is arranged in contact with the installation position; A second contact surface is provided on the upper side of the component body; a third contact surface, provided on the lower side of the component body; a covering strip notch provided on one side of the upper side of the component body; The PU covering strip is arranged in the covering strip notch.

2. The PVC multi-cavity structural member according to claim 1, characterized in that: The buckle portion is a clamping boss.

3. The PVC multi-cavity structural member according to claim 1 or 2, characterized in that: The first contact surface includes a first contact sub-surface, a second contact sub-surface, and a third contact sub-surface, and the first contact sub-surface, the second contact sub-surface, and the third contact sub-surface are continuously arranged from the buckle portion to the left side of the component body.

4. The PVC multi-cavity structural member according to claim 3, characterized in that: It also includes a groove portion, which is arranged on the lower side of the component body close to the buckle portion.

5. The PVC multi-cavity structural member according to claim 4, characterized in that: A first cavity, a second cavity and a third cavity are arranged in the component body at intervals.

6. The PVC multi-cavity structural member according to claim 5, characterized in that: A first mounting rib and a second mounting rib are respectively provided on the left and right sides of the covering strip notch.

7. The PVC multi-cavity structural member according to claim 6, characterized in that: A PVC support piece is provided at the bottom of the PU covering strip.

8. A profile, characterized in that: It includes a plastic-steel fan profile, a plastic-steel frame profile, and a PVC multi-cavity structural member as described in any one of claims 1-7. The plastic-steel fan profile and the plastic-steel frame profile are connected in a coordinated manner, and the PVC multi-cavity structural member is arranged in a cavity formed between the plastic-steel fan profile and the plastic-steel frame profile.

9. The profile according to claim 8, characterized in that The snap-fit ​​portion of the PVC multi-cavity structural member is snapped into the national standard frame strip groove of the plastic-steel frame profile; the first contact surface abuts against the outer support of the plastic-steel frame profile, and the groove portion is cooperated with the inner support of the plastic-steel frame profile.

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