A prefabricated component with internal and external R-angles

Abstract

This utility model belongs to the field of building materials technology, and in particular to a prefabricated component with internal and external R-angles. It includes a right-angled body, with an R-angle surface between its two right-angled faces and flat end faces at both ends. It also includes a waterproof rubber strip, which is a right-angled triangular component fixed to the two flat end faces of the right-angled body. A positioning protrusion is provided on one right-angled face of the waterproof rubber strip, and a positioning groove is provided on the flat end face for the positioning protrusion to be inserted. This utility model's prefabricated component with internal and external R-angles effectively avoids large lateral gaps between the end of the roofing membrane and the parapet wall, or large gaps between the membrane and the flat end face, by adding a waterproof rubber strip to the flat end face of the right-angled body. This improves waterproof performance and eliminates the need to change the original shape of the roof and parapet wall, making construction more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of building materials technology, specifically relating to a prefabricated component with internal and external R-angles. Background Technology

[0002] Currently, for waterproofing parapet walls, the mortar leveling layer is usually applied in an arc shape or a 45-degree slope at the junction of the roof and the vertical parapet wall. Then, the membrane adhesive is brushed on to make the membrane adhere tightly, preventing the membrane from being suspended or broken, and an additional layer of membrane is laid.

[0003] Because the R-corner backflash is an arc shape, it is difficult to control the angle uniformly. After manual construction, it is very easy to cause the arc angle to be inconsistent, which affects the overall construction quality. In addition, the traditional method of constructing R-corner backflash requires workers to build it up little by little with cement mortar, which is very inefficient and increases the construction cost. Moreover, because it is only a matter of slowly building up cement mortar, the strength is insufficient.

[0004] A search revealed that Chinese utility model patent CN217975080U discloses "a prefabricated component for a prefabricated roof R-corner," which includes a right-angled body. An R-corner surface is provided between the two right-angled faces of the right-angled body. Several arc-shaped ribs I are arranged side by side within the right-angled body corresponding to the R-corner surface. Several straight ribs are arranged along the long side of the right-angled body on the arc-shaped ribs I. This solves the problem of leakage at the base of the parapet wall caused by the non-standard fabrication of traditional manual R-corners.

[0005] In the prior art, including the above-mentioned R-angle precast components, the two ends of the right-angle body are usually designed as flat ends to facilitate the casting of R-angle precast components. This results in a large lateral gap between the end of the waterproof membrane and the parapet wall or a large gap between the membrane and the flat end when the waterproof membrane is laid later, which easily leads to rainwater leakage.

[0006] To solve the above problems, this utility model proposes a prefabricated component with internal and external R-angles. Utility Model Content

[0007] To address the aforementioned problems in the existing technology, this utility model provides a prefabricated component with internal and external R-angles, which features easy construction, high stability, and good waterproofing.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated component with internal and external R-angles, comprising a right-angled body, wherein the area between the two right-angled faces of the right-angled body is an R-angle surface, and the two ends of the right-angled body are flat end faces, and further comprising:

[0009] A waterproof rubber strip, wherein the waterproof rubber strip is a right-angled triangular component and is fixed to the two flat end faces of the right-angled body, and a positioning protrusion is provided on the right-angled surface of the waterproof rubber strip, and a positioning groove is provided on the flat end face for the positioning protrusion to be inserted.

[0010] In a preferred embodiment of this invention, the inclined surface of the waterproof rubber strip is tangent to the end of the R-angle surface.

[0011] As a preferred technical solution of this utility model, a plurality of No. 2 rubber storage tanks are processed on the inclined surface of the waterproof rubber strip.

[0012] As a preferred embodiment of this utility model, the outer wall of the positioning protrusion is tightly fitted to the inner wall of the positioning groove.

[0013] As a preferred technical solution of this utility model, multiple No. 1 glue storage tanks are processed on both right-angled surfaces of the right-angled body.

[0014] As a preferred embodiment of this utility model, it further includes a reinforcing cage, which serves as a framework for casting and molding the right-angled body, wherein the reinforcing cage comprises:

[0015] The main reinforcing bars are bent into an "L" shape, and multiple such main reinforcing bars are distributed at equal intervals;

[0016] Flat-end reinforcing bars, two of which are respectively fixed at both ends of the main reinforcing bar;

[0017] An arc-shaped reinforcing bar, which is fixed between two flat-end reinforcing bars;

[0018] The No. 1 straight steel bar is used to connect multiple main steel bars into one unit.

[0019] As a preferred embodiment of this utility model, the reinforcing cage further includes:

[0020] The No. 2 straight steel bar, and multiple of the flat-end steel bars are connected into one piece by the No. 2 straight steel bar.

[0021] As a preferred embodiment of this utility model, the reinforcing cage further includes:

[0022] The No. 3 straight steel bar, and multiple of the aforementioned curved steel bars are connected into one piece by the No. 3 straight steel bar.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] In this invention, by adding a waterproof rubber strip to the flat end face of the right-angled body, a large lateral gap is effectively avoided between the end of the roll material and the parapet wall or a large frame gap is avoided between the roll material and the flat end, thus improving the waterproof performance. Moreover, it does not require changing the original shape of the roof and the parapet wall, making construction more convenient.

[0025] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the isometric structure of this utility model;

[0029] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the diagram;

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the isometric structure of the steel cage in this utility model.

[0032] In the diagram: 1. Right-angled body; 11. Rounded corner surface; 12. Flat end face; 13. No. 1 glue storage tank; 14. Positioning groove; 2. Waterproof rubber strip; 21. Positioning protrusion; 22. No. 2 glue storage tank; 3. Reinforcing cage; 31. Main reinforcing bar; 32. Flat end reinforcing bar; 33. Curved reinforcing bar; 34. No. 1 straight reinforcing bar; 35. No. 2 straight reinforcing bar; 36. No. 3 straight reinforcing bar. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-5The present invention provides the following technical solution: a prefabricated component with internal and external R-angles, including a right-angled body 1, the R-angle surface 11 between the two right-angled surfaces of the right-angled body 1, and the two ends of the right-angled body 1 being flat end surfaces 12, and also including: a waterproof rubber strip 2.

[0035] Furthermore, by Figures 1-3 As shown in this embodiment, the waterproof rubber strip 2 is a right-angled triangular component and is fixed on the two flat end faces 12 of the right-angled body 1. There is a positioning protrusion 21 on one right-angled surface of the waterproof rubber strip 2, and a positioning groove 14 for the positioning protrusion 21 to be inserted on the flat end face 12. After adopting the above scheme, in use, the first step is to cast and install the R-angle prefabricated component. The size of the R-angle prefabricated component is determined by the size of the inside corner of the roof and the parapet wall. The R-angle prefabricated component is made by casting mold. The center line is popped at the inside corner of the roof and the parapet wall to ensure that the R-angle surface 11 of the prefabricated component coincides with the inside corner axis.

[0036] The positioning protrusion 21 of the waterproof rubber strip 2 is embedded into the positioning groove 14 of the flat end face 12 and fixed with glue or expansion screws. When using glue, the glue is evenly applied to the flat end face 12, and some of the glue enters the positioning groove 14. After the positioning protrusion 21 is embedded in the positioning groove 14, it forms an engagement with the flat end face 12, which further improves the stability and sealing of the waterproof rubber strip 2 installation. The waterproof rubber strips 2 at both ends of the right angle body 1 are installed and fixed in the same way.

[0037] The waterproof rubber strip 2 is preferably made of EPDM rubber, which has excellent weather resistance, sealing performance, aging resistance and chemical resistance, and is also low in cost.

[0038] After the prefabricated right-angled component 1 and the waterproof rubber strip 2 are assembled, polyurethane sealant with a thickness of ≥3mm is applied to the two right-angled surfaces of the assembly to prevent leakage at the fixing points. Then, the two right-angled surfaces of the assembly are tightly attached to the roof and parapet wall base respectively, with the R-corner surface 11 facing the inside of the inside corner, thus completing the installation of the R-corner prefabricated component.

[0039] Cut out SBS rolls of appropriate size, cover the R-corner 11 of the precast component and 150mm on each side, and extend the SBS rolls from the roof to the parapet wall. The rolls are turned up to a height of ≥500mm on the parapet wall. The SBS rolls are then glued to the R-corner 11 and the waterproof rubber strips 2 at both ends.

[0040] Apply a 2mm thick non-curing rubber asphalt coating with a width of ≥200mm to the joint between the R-angle precast component and the wall to form a creep-type sealing layer. Apply a 2mm thick polymer cement waterproof coating to the end of the SBS roll material and extend it to the surface of the rubber strip 2 of the precast component.

[0041] This utility model effectively avoids large lateral gaps between the end of the roll material and the parapet wall or large frame gaps between the roll material and the flat end by adding a waterproof rubber strip 2 to the flat end face 12 of the right-angle body 1, thereby improving the waterproof performance. Moreover, it does not require changing the original shape of the roof and the parapet wall, making construction more convenient.

[0042] By standardizing the construction of prefabricated R-corner components, the traditional seven-step process for waterproofing internal corners can be simplified to three steps, shortening the construction period by more than 50% and effectively reducing human error.

[0043] Preferably, by Figures 1-3 As shown in this embodiment, the inclined surface of the waterproof rubber strip 2 is tangent to the end of the R-corner surface 11. With the above solution, when in use, the tangent point is located on the extension line of the center of the R-corner surface 11, and the inclined surface angle α = 45° ± 5°, ensuring that the waterproof rubber strip 2 and the R-corner surface 11 form a continuous curved surface transition.

[0044] In addition, the inclined length L of the waterproof rubber strip 2 is R + 20mm (R is the radius of the R corner 11). For example, when R = 50mm, L = 70mm, covering the easily cracked area at the end of the R corner 11. When the waterproof rubber strip 2 is made of EPDM rubber, its hardness is 60±5 Shore A, tensile strength is ≥7MPa, elongation at break is ≥300%, and aging resistance is ≥25 years, which can adapt to the deformation of the R corner 11.

[0045] Preferably, by Figures 1-3 As shown in this embodiment, multiple No. 2 glue storage tanks 22 are processed on the inclined surface of the waterproof rubber strip 2. After adopting the above scheme, when in use, the No. 2 glue storage tank 22 is a semi-closed groove with a depth of 3-5mm and a width of 10-15mm. It is filled with non-curing rubber asphalt sealant to form a self-healing flexible sealing strip that can adapt to structural deformation. When the roof and parapet wall have a misalignment of ±3mm, the sealant in the No. 2 glue storage tank 22 will generate a strain of 10%-15%, which will fill the gap through plastic flow and avoid stress concentration.

[0046] Furthermore, after the SBS roll material is bonded and fixed to the waterproof rubber strip 2, the adhesive in the second adhesive reservoir 22 can further enhance the adhesion to the waterproof rubber strip 2, providing stability and sealing for the installation of the waterproof rubber strip 2.

[0047] The second rubber storage tank 22 is arranged at equal intervals along the inclined length of the waterproof rubber strip 2, with a spacing of ≤100mm, and the distance from the first tank to the end of the R-corner surface 11 is ≤50mm.

[0048] Preferably, by Figures 1-3As shown in this embodiment, the outer wall of the positioning protrusion 21 is tightly fitted to the inner wall of the positioning groove 14. With the above solution, the positioning protrusion 21 and the positioning groove 14 are interference fit during use, with a tolerance of H7 / g6, to ensure no loosening gap.

[0049] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, multiple No. 1 glue storage tanks 13 are processed on both right-angled surfaces of the right-angled body 1. After adopting the above scheme, when in use, the No. 1 glue storage tank 13 has the same design intention as the No. 2 glue storage tank 22 mentioned above. It is filled with non-curing rubber asphalt sealant to form a flexible bonding interface with the wall base and absorb the relative deformation of the roof and parapet wall.

[0050] In terms of design, the No. 1 glue storage tank 13 and the No. 2 glue storage tank 22 on the inclined surface of the waterproof rubber strip 2 form a three-dimensional glue storage network, achieving full sealing of "plane + vertical surface + inside and outside corners", and realizing the standardization of waterproofing at all nodes.

[0051] Preferably, by Figures 1-5 As shown, this embodiment also includes a reinforcing cage 3, which serves as a framework for casting the right-angled body 1. The reinforcing cage 3 includes: main reinforcing bars 31 bent into an "L" shape, flat-end reinforcing bars 32, curved reinforcing bars 33, and a first straight reinforcing bar 34. Multiple main reinforcing bars 31 are evenly spaced, two flat-end reinforcing bars 32 are fixed to both ends of the main reinforcing bars 31 respectively, and curved reinforcing bars 33 are fixed between the two flat-end reinforcing bars 32. Multiple main reinforcing bars 31 are connected into one unit by the first straight reinforcing bar 34. After adopting the above scheme, in use, through the optimized design of the reinforcing cage 3, the bending stiffness of the R-angle precast component is increased by 40%, and the crack control level is improved by one level, realizing the integration of structural safety and waterproof function.

[0052] In this embodiment, all components of the steel cage 3 are fixed by welding.

[0053] This utility model uses a main steel bar 31 bent into an "L" shape as the main support member. The flat end steel bars 32 at both ends correspond to the flat end face 12 of the right angle body 1. An arc-shaped steel bar 33 is welded between the two flat end steel bars 32 to form a frame structure with higher structural strength. According to ANSYS finite element analysis, this design reduces the tensile stress of the concrete on the R-corner surface 11 by 30% and increases the load at which cracks appear to 1.5 times the design load.

[0054] In addition, the overall structural design of the steel cage 3 not only has higher structural strength, but also facilitates construction.

[0055] Preferably, by Figures 1-5As shown in this embodiment, the steel cage 3 also includes: No. 2 straight steel bar 35, and multiple flat-end steel bars 32 are connected into one piece by No. 2 straight steel bar 35. After adopting the above scheme, when in use, the flat-end steel bars 32 of the same flat end face 12 are spot welded together by No. 2 straight steel bar 35, so that the shear bearing capacity of the flat end face 12 is increased from 18kN to 28kN, and the construction adaptability and structural safety of the R-angle precast component are significantly improved.

[0056] Preferably, by Figures 1-5 As shown in this embodiment, the steel cage 3 also includes: a No. 3 straight steel bar 36, and multiple curved steel bars 33 connected together by the No. 3 straight steel bar 36. After adopting the above scheme, when in use, multiple curved steel bars 33 are spot welded together by the No. 3 straight steel bar 36, which further reduces the tensile stress of concrete on the R-corner surface 11 and reduces the risk of cracking.

[0057] Components not described in detail in this article are existing technologies.

[0058] The working principle and usage process of this utility model: The prefabricated component with internal and external R-angles of this utility model has a main steel bar 31 bent into an "L" shape as the main support component, and the flat end steel bars 32 at both ends correspond to the flat end face 12 of the right angle body 1. An arc-shaped steel bar 33 is welded between the two flat end steel bars 32 to form a frame structure with higher structural strength.

[0059] By adding a waterproof rubber strip 2 to the flat end face 12 of the right-angle body 1, a large lateral gap between the end of the roll material and the parapet wall or a large frame gap between the roll material and the flat end is effectively avoided, thus improving the waterproof performance. Moreover, the original shape of the roof and the parapet wall does not need to be changed, making construction more convenient.

[0060] By standardizing the construction of prefabricated R-corner components, the traditional seven-step process of waterproofing inside corners can be simplified to three steps, shortening the construction period by more than 50% and effectively reducing human error.

[0061] In terms of design, the No. 1 glue storage tank 13 and the No. 2 glue storage tank 22 on the inclined surface of the waterproof rubber strip 2 form a three-dimensional glue storage network, achieving full sealing of "plane + vertical surface + inside and outside corners", and realizing the standardization of waterproofing at all nodes.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 R-angle prefabricated component of female-male type, comprising a right-angle body (1), between two right-angle faces of which is an R-angle face (11), and two end faces of which are flat end faces (12), characterized in that, Also includes: Waterproof rubber strip (2), the waterproof rubber strip (2) is a right-angled triangular component and is fixed on the two flat end faces (12) of the right-angled body (1). There is a positioning protrusion (21) on one right-angled surface of the waterproof rubber strip (2), and there is a positioning groove (14) on the flat end face (12) for the positioning protrusion (21) to be inserted.

2. A R corner prefabricated element according to claim 1, characterized in that: The inclined surface of the waterproof rubber strip (2) is tangent to the end of the R-angle surface (11).

3. The R corner prefabricated member according to claim 1, characterized in that: Multiple second rubber storage tanks (22) are machined on the inclined surface of the waterproof rubber strip (2).

4. The R corner prefabricated member according to claim 1, characterized in that: The outer wall of the positioning protrusion (21) fits tightly against the inner wall of the positioning groove (14).

5. The R corner prefabricated member according to claim 1, characterized in that: Multiple No. 1 glue storage tanks (13) are machined on both right-angled surfaces of the right-angled body (1).

6. The R corner prefabricated member according to claim 1, characterized in that: It also includes a reinforcing cage (3), which serves as a framework for casting the right-angled body (1), wherein the reinforcing cage (3) comprises: The main reinforcing bars (31) are bent into an "L" shape, and multiple main reinforcing bars (31) are distributed at equal intervals; Flat-end steel bars (32), two of the flat-end steel bars (32) are respectively fixed to both ends of the main steel bar (31); An arc-shaped reinforcing bar (33) is fixed between two flat-end reinforcing bars (32); The No. 1 straight steel bar (34) and multiple main steel bars (31) are connected together by the No. 1 straight steel bar (34).

7. A male-female R-angle prefabricated component according to claim 6, characterized in that: The steel cage (3) also includes: The No. 2 straight steel bar (35) and the plurality of the said flat-end steel bars (32) are connected together by the No. 2 straight steel bar (35).

8. The R corner prefabricated member according to claim 6, characterized in that: The steel cage (3) also includes: The No. 3 straight steel bar (36) and the multiple curved steel bars (33) are connected together by the No. 3 straight steel bar (36).

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