Anti-expansion and anti-shrinkage sealing rubber strip for building enclosure system

Abstract

The utility model relates to the technical field of sealing, in particular to an anti-expansion sealing rubber strip for a building enclosure system, which comprises a rubber strip body and elastic claws, the rubber strip body is trapezoidal, a plurality of hollow holes are formed in the rubber strip body, the rubber strip body is provided with two ladder surface parts, and the elastic claws are symmetrically arranged at the two ladder surface parts; a metal belt is embedded in the adhesive tape body and comprises a flat plate part and inclined plate parts arranged at the two ends of the flat plate part respectively, and the flat plate part and the inclined plate parts are combined to form a trapezoid; the metal belt and the adhesive tape body synchronously extend in the first direction, a plurality of cutting grooves are formed in the surface of the metal belt, and the cutting direction of the cutting grooves is perpendicular to the first direction.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to an anti-expansion and contraction sealing strip for a building envelope system. Background Art

[0002] In a building metal envelope system, rubber sealing strips are commonly used between metal roof (wall) panels and between cover plates and panels, which can prevent leakage or intrusion of rainwater, air, dust, etc., and can prevent or reduce damage caused by mechanical vibration and impact, so as to achieve functions such as sealing, sound insulation, heat insulation and shock absorption.

[0003] The inventor has learned that the existing sealing strip has a large linear expansion coefficient. After long-term use, serious expansion and contraction phenomena (thermal expansion or cold contraction) will occur. It is easy for the sealing strip to break away from the installation position after contraction; for example, the shrinkage rate of a 10m long rubber strip is about 1%, and it will shrink by 10cm after half a year of installation, forming a 10cm gap, which seriously affects the sealing between adjacent plate joints. And after the sealing strip expands, it squeezes the adjacent plate members, which is likely to cause the plate members to bulge. Summary of the Utility Model

[0004] The utility model provides an anti-expansion and contraction sealing strip for a building envelope system, which can solve at least one of the above technical problems.

[0005] To solve the above technical problems, one or more embodiments of the utility model provide an anti-expansion and contraction sealing strip for a building envelope system, including a sealing strip body and elastic claws. The sealing strip body is trapezoidal, and there are a plurality of hollow holes in the sealing strip body. The sealing strip body has two trapezoidal faces, and a plurality of elastic claws are symmetrically arranged at the two trapezoidal faces; a metal strip is embedded in the sealing strip body. The metal strip includes a flat part and inclined plate parts respectively arranged at both ends of the flat part. The flat part and the inclined plate parts are combined into a trapezoid; the metal strip and the sealing strip body extend synchronously along a first direction, and the surface of the metal strip has a plurality of cutting grooves, and the cutting direction of the cutting grooves is perpendicular to the first direction.

[0006] The beneficial effects of the above one or more technical solutions are as follows:

[0007] In this solution, the sealing strip includes a sealing strip body, elastic claws arranged on both sides of the trapezoidal face of the sealing strip body, and a metal strip nested in the sealing strip body.

[0008] In this setting method, the metal strip nested in the sealing strip body can be used to reduce the probability of expansion and contraction of the sealing strip body along the first direction. The metal strip is not easy to expand or contract, and the expansion and contraction of the sealing strip body along the first direction needs to overcome the adhesion and resistance between the metal strip and the sealing strip. That is, this solution can reduce the probability of expansion and contraction of the sealing strip through the structural setting of the sealing strip body and the metal strip, and further avoid the problem that the expansion and contraction deformation of the sealing strip body affects the installation of plate members in the envelope system.

[0009] In this solution, the metal strip includes a flat plate portion and an inclined plate portion, and the surface of the metal strip has cutting grooves perpendicular to the extension direction of the metal strip. This setting method can provide a bendable metal strip, so that the metal strip can be bent synchronously with the rubber strip body and maintain the rubber strip body in the bent state. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of the sealing rubber strip in Embodiment 1 of the present utility model;

[0011] Figure 2 It is a schematic diagram of the metal plate before bending in Embodiment 1 of the present utility model;

[0012] Figure 3 It is a schematic diagram of the metal plate bent into a metal strip in Embodiment 1 of the present utility model;

[0013] Figure 4 It is a schematic diagram of the sealing rubber strip during use in Embodiment 1 of the present utility model;

[0014] Figure 5 It is a cross-sectional view of the sealing rubber strip in Embodiment 2 of the present utility model.

[0015] In the figure, 1, vertical purlin; 2, structural nail; 3, sandwich panel; 4, sealing rubber strip; 5, metal strip; 41, rubber strip body; 42, elastic claw; 43, hollow hole; 44, T-shaped groove; 501, metal plate; 51, open groove; 52, closed groove; 53, inclined plate portion; 54, flat plate portion; 6, decorative plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To clearly illustrate the technical features of this solution, the present utility model will be described in detail below through specific embodiments and in conjunction with its accompanying drawings.

[0017] See Figures 1-4 , an embodiment of the present utility model provides an anti-expansion and contraction sealing rubber strip for a building envelope system, including a rubber strip body 41 and elastic claws 42. The rubber strip body 41 is trapezoidal, and there are multiple hollow holes 43 inside the rubber strip body 41. The rubber strip body 41 has two trapezoidal faces, and multiple elastic claws 42 are symmetrically arranged at the two trapezoidal faces; a metal strip 5 is embedded in the rubber strip body 41. The metal strip 5 includes a flat plate portion 54 and inclined plate portions 53 respectively arranged at both ends of the flat plate portion 54. The flat plate portion 54 and the inclined plate portions 53 are combined into a trapezoid; the metal strip 5 and the rubber strip body 41 extend synchronously in the first direction, and the surface of the metal strip 5 has multiple cutting grooves, and the cutting direction of the cutting grooves is perpendicular to the first direction.

[0018] Specifically, the metal strip here is completely covered by the rubber strip body, and the covering layer of the rubber strip body is 0.3 mm to 3 mm.

[0019] In this embodiment, the two inclined plate portions 53 are respectively nested in the two stepped surface portions of the rubber strip body 41. A plurality of transverse plate portions are provided between the two stepped surface portions, and a flat plate portion 54 is nested in the transverse plate portions.

[0020] In this embodiment, the elastic claws 42 extend towards the end face with a larger width in the rubber strip body 41.

[0021] In this embodiment, the cutting groove includes an opening groove 51, and the opening groove 51 extends from the end face of the inclined plate portion 53 towards the flat plate portion 54; the cutting groove further includes a closed groove 52, and the closed groove 52 penetrates through the flat plate portion 54 in the thickness direction and extends to the inclined plate portion 53. The part of the closed groove 52 in the flat plate portion 54 is square, and the part of the closed groove 52 in the inclined plate portion 53 and the opening groove 51 are V-shaped.

[0022] See Figure 2 , the metal strip is formed by bending a metal plate 501. In the unbent metal plate, the dimensions of the opening groove and the closed groove are: a is 15 mm to 35 mm, b is 2 mm to 20 mm, c is 2 mm to 10 mm, and d is 0.2 mm to 5 mm. Preferably, a = 35 mm, b = 17 mm, c = 5 mm, and d = 1 mm.

[0023] Generally, the bending angles of the inclined plate portion and the flat plate portion are matched according to actual application requirements, and the angles are 90° to 120°. Preferably, the bending angles of the inclined plate portion and the flat plate portion are preferably 95°.

[0024] Specifically, the thickness of the metal plate 501 is 0.3 mm to 0.5 mm, and the yield strength ≥ 220 MPa.

[0025] In this embodiment, the rubber strip body 41, the elastic claws 42 and the metal strip 5 are integrally formed.

[0026] In this embodiment, the included angle value between the two stepped surface portions is equal to the included angle value between the two inclined surface portions. The rubber strip body 41 has a flat surface and a curved surface. The width of the flat surface is smaller than the width of the curved surface. The flat surface constitutes the large end of the rubber strip body 41, and the curved surface constitutes the small end of the rubber strip body 41.

[0027] The sealing strip in this embodiment is applicable to the sealing, sound insulation, heat insulation and shock absorption between metal roof (wall) panels, between the cover plate and the panel. This rubber sealing strip has an extremely low linear expansion coefficient, and the low-temperature expansion and contraction rate is less than 0.15%, improving the thermal expansion and contraction resistance of the rubber sealing strip and greatly reducing the expansion and contraction problem of traditional building rubber sealing strips. At the same time, the sealing rubber strip 4 is compounded with a bendable metal strip 5, making the overall structure have a certain toughness and reducing the probability of the rubber sealing strip falling off.

[0028] Specifically, the sealing strip is made of rubber, and the sealing rubber strip is a modified composite of one or more of foamed or non-foamed ethylene propylene diene monomer (EPDM) rubber, foamed or non-foamed nitrile rubber, and foamed or non-foamed silicone rubber. The density of the rubber is 1.0 - 1.5 g / cm3, and the content of inorganic filler is 15% - 28%. The performance complies with "GB / T 24498-2009 Sealing Strips for Building Doors, Windows and Curtain Walls".

[0029] As Figure 4 shown, after the anti-expansion and contraction rubber sealing strip of the present utility model is installed, it can solve the problem of expansion and contraction of the middle seam rubber strip in the industry. The shape of the middle seam rubber strip and the shape of the bent steel strip can be redesigned for secondary adjustment to meet the actual requirements of the project, greatly improving the construction quality, and can be widely popularized and used in the industry.

[0030] When in use, refer to Figure 4 . A board seam is formed between two sandwich panels 3, and the vertical purlins spanning the board seam fix the two sandwich panels together using structural nails. The above-mentioned sealing strip 4 is filled in the board seam.

[0031] Embodiment 2

[0032] Refer to Figure 5 . The structural settings of this embodiment are basically the same as those of Embodiment 1. The difference is that in this embodiment, the rubber strip body 41 has a first end face and a second end face, the width of the first end face is smaller than that of the second end face, and a T-shaped groove 44 is provided at the second end face for inserting the hook of the decorative plate 6.

[0033] The above specific implementation manners cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manners of the present utility model falls within the protection scope of the present utility model.

[0034] Those parts not detailed in the present utility model are all well-known technologies to those skilled in the art of this technology.

Claims

1. An anti-expansion and shrinkage sealing strip for a building enclosure system, characterized in that: It includes a rubber strip body and an elastic claw, wherein the rubber strip body is trapezoidal, has a plurality of hollow holes in the rubber strip body, and has two stepped portions, where a plurality of the elastic claws are symmetrically arranged; A metal belt is embedded in the rubber strip body, and the metal belt includes a flat plate portion and inclined plate portions respectively arranged at both ends of the flat plate portion, and the flat plate portion and the inclined plate portion are combined into a trapezoid; The metal belt and the rubber strip body extend synchronously along a first direction. The surface of the metal belt has a plurality of cutting grooves, and the cutting directions of the cutting grooves are perpendicular to the first direction.

2. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The two inclined plate parts are respectively embedded in the two stepped surface parts of the rubber strip body, and a plurality of transverse plate parts are arranged between the two stepped surface parts, and the flat plate parts are embedded in the transverse plate parts.

3. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The elastic claws extend toward the end surface with a larger width in the rubber strip body.

4. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The cutting groove comprises an open groove, and the open groove extends from the end surface of the inclined plate portion toward the flat plate portion; The cutting groove also includes a closed groove, which passes through the flat plate portion along the thickness direction and extends to the inclined plate portion. The closed groove portion at the flat plate portion is square, and the closed groove portion at the inclined plate portion and the open groove are V-shaped.

5. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The rubber strip body, the elastic claws and the metal belt are integrally formed.

6. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The included angle value of the two step portions is equal to the included angle value of the two bevel portions.

7. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The rubber strip body has a plane and an arc surface, the width of the plane is smaller than the width of the arc surface, the plane constitutes the large end of the rubber strip body, and the arc surface constitutes the small end of the rubber strip body.

8. The anti-expansion and shrinkage sealing strip for building envelope system according to claim 1, characterized in that: The rubber strip body has a first end face and a second end face, the width of the first end face is smaller than the width of the second end face, and a T-shaped groove is provided at the second end face, and the T-shaped groove is used for inserting a hook of the decorative plate.

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