Back ridge for preventing water seepage and smoke leakage of flue and flue template system
By designing a back rib structure, the hidden limiting and integrated molding of the flue formwork are achieved, which solves the problem of smoke and water leakage during flue construction, improves construction efficiency and quality, and reduces costs.
Patent Information
- Application Number
- CN202520152157.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Traditional flue construction methods suffer from smoke and water leakage, especially in confined spaces where formwork installation and dismantling are difficult, resulting in low construction efficiency, high costs, and difficulty in achieving one-time concrete molding of the flue, walls, and floors.
A back-rib structure is designed, including an installation part and a limiting part. The installation part is embedded in the main formwork of the flue, and the limiting part spans the corner formwork, realizing the hidden design and limiting of the formwork, ensuring tight connection of the formwork, and adopting integrated molding technology to reduce secondary construction.
It improves the perfect fit between the flue and the wall and floor, avoids gaps, reduces smoke leakage points, lowers construction costs, meets low-carbon and environmental protection requirements, and improves construction quality and safety.
Smart Images
Figure CN223907859U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of building, in particular to a back rabbet and a flue formwork system for preventing water seepage and smoke leakage. BACKGROUND
[0002] In the field of construction, the application of aluminum alloy building formwork system is gradually becoming a trend. This system uses integrally extruded aluminum profiles as raw materials and is made through precise machining. This formwork system has many obvious advantages: first, the entire system has a very high degree of standardization, which can effectively ensure construction quality and efficiency; second, it is light in weight, easy to transport and install, greatly reducing the labor intensity of construction personnel; at the same time, the bearing capacity of the aluminum alloy formwork is very strong, which can meet various complex construction needs. In addition, the formwork has high fitting precision, which can ensure the tight connection between various parts, thereby improving the integrity and stability of the construction. More worth mentioning is that this formwork can be recycled, greatly reducing the construction cost and meeting the concept of sustainable development. In the construction process, the aluminum alloy building formwork system does not need the assistance of mechanical equipment, further simplifying the construction process and shortening the construction period. Since its construction process is clean and environmentally friendly, it will not produce construction waste and noise pollution, and the disturbance to the surrounding environment is minimized. When the concrete pouring is completed, the concrete surface after the formwork is removed is smooth and does not need additional finishing, which not only improves the construction efficiency but also guarantees the appearance quality of the building.
[0003] The aluminum alloy formwork system also adopts an advanced early removal system, which allows the concrete building to be removed from the formwork within 24 hours after pouring, while the support system is retained until the third layer is removed. This efficient construction method can achieve a construction progress of 4-5 days per floor, greatly improving the construction efficiency of the building project and shortening the project period, bringing significant economic benefits to developers and construction parties. During the construction process of the aluminum alloy formwork reinforcement, most of the components can be safely and effectively assembled and disassembled on site. However, in some enclosed spaces, the vertical height is high and the working space is small, such as small hollow closed components like smoke exhaust shafts, and the assembly and disassembly of the formwork cannot be normally carried out.
[0004] In related technologies, the problem of smoke leakage and water seepage of the flue formwork system has always been a common headache, and the traditional flue construction method has many drawbacks. For example, there are gaps between the traditional flue and the structure floor, which need to be treated by secondary hoisting hole. However, the quality of the hoisting hole is often difficult to guarantee, and it is easy to cause seepage and smoke leakage hazards. In addition, in the construction of the traditional flue, the butt joint part is usually disconnected at the position of the floor steel support unloading, and the gap at the butt joint of the two flues against the wall is difficult to completely seal. This leads to an increase in the original smoke leakage points and a great risk of smoke leakage. From the smoke test results of previous projects, the effect of this traditional construction method is often unsatisfactory.
[0005] Due to the narrow internal space of the flue, construction personnel cannot enter the flue to install and disassemble the formwork, which brings great challenges to construction. How to realize one-time concrete forming of the flue, wall and floor to improve production efficiency, assembly efficiency and project construction efficiency, reduce the cumbersome process of secondary construction, and reduce construction cost has become a difficult problem to be solved. Practical new type content
[0006] Therefore, it is necessary to provide a back ledge and flue formwork system which is efficient and convenient to disassemble, prevents water seepage and smoke leakage of the flue.
[0007] A back ledge for preventing water seepage and smoke leakage of a flue, the back ledge comprising:
[0008] a mounting portion arranged in a first cavity of a main flue formwork, a bottom surface of the mounting portion abutting a panel of the main flue formwork, and an upper edge of the mounting portion not exceeding a side plate of the main flue formwork; and
[0009] a limiting portion, at least two of which are provided, each of the limiting portions being arranged at the upper edge of the mounting portion and extending from the mounting portion to both sides, the limiting portion spanning the side plate of the main flue formwork and the side plate of a flue corner formwork adjacent to both sides, and a terminal end of the limiting portion being capable of limiting the flue corner formwork.
[0010] In one of the embodiments, the mounting portion comprises a bottom wall and a side wall, the bottom wall abutting the panel of the main flue formwork, the side wall being arranged vertically on the bottom wall, the limiting portion being arranged on the side wall, the side wall being arranged towards the first cavity, and edges of the side wall and the bottom wall abutting the side plate of the main flue formwork.
[0011] In one of the embodiments, a first fixed connection hole for connecting the panel is arranged on the bottom wall, and a first bolt is arranged in the first fixed connection hole.
[0012] In one of the embodiments, a second fixed connection hole for connecting a reinforcing rib of the main flue formwork is arranged on the side wall, and a second bolt is arranged in the second fixed connection hole.
[0013] In one of the embodiments, the length of the limiting portion is 20-100mm different from the width of the main flue formwork, and / or the height of the limiting portion is 5-50mm.
[0014] In one of the embodiments, the limiting portion comprises a horizontal edge and a folded edge, the horizontal edge abutting the edge of the main flue formwork and the edges of the flue corner formwork on both sides, the folded edge being arranged at an angle with the horizontal edge, and the folded edge extending into a second cavity of the flue corner formwork to engage the main flue formwork and the flue corner formwork.
[0015] In one of the embodiments, the angle between the folding edge and the horizontal edge is greater than or equal to 120°.
[0016] In one of the embodiments, the limiting part comprises a horizontal edge and a connecting part at the end of the horizontal edge, the horizontal edge abutting against the edge of the flue main template and the edge of the flue corner template, and the connecting part clamping the side plate of the flue main template and the side plate of the flue corner template.
[0017] A flue template system comprises:
[0018] A flue main template is provided with a plurality of;
[0019] A flue corner template is arranged between adjacent flue main templates and forms a flue area together with the flue main templates; and
[0020] The back brace as described above.
[0021] In one of the embodiments, the side plate of the flue main template is arranged at an angle with the side plate of the flue corner template, and the opening between the side plate of the flue main template and the side plate of the flue corner template is arranged towards the flue area.
[0022] The back brace and the flue template system using the same as described above, the mounting part is arranged in the first cavity of the flue main template, the back brace is mostly embedded in the main template, and the back brace is designed in a hidden manner, which can adapt to a smaller space, so that the movable space of the template is larger, and the convenience of subsequent template disassembly is facilitated; the limiting part structure is designed to limit the flue corner template, reinforce the template, and prevent the templates from being misaligned with each other, so that the flue corner templates on both sides and the flue main template in the middle are connected into one body; the back brace can be integrally formed, the structure is simple, only a few components are needed, even if a multi-part welding method is used, it is convenient for processing, and it is more convenient for aluminum mold design and construction; the construction is integrated, the secondary construction is reduced, the flue and the wall and the floor can be formed by concrete at one time, the complicated process of secondary construction is avoided, the construction hidden danger is effectively reduced, the safety and reliability of the building are improved, the gap problem caused by secondary construction is fundamentally solved, the seepage and leakage hidden danger is effectively eliminated; the back brace and the flue template system using the same as described above have high standardization and high matching precision, which can ensure that the flue and the wall and the floor are perfectly matched, avoid the generation of gaps, effectively reduce the leakage points, and improve the construction quality; no mechanical equipment is needed in the construction process, there is no construction waste and noise pollution, which meets the national low-carbon emission reduction requirements, is friendly to the surrounding environment, can be recycled, reduces the material cost, reduces the maintenance cost caused by seepage and leakage problems, and brings significant economic benefits to the developers and construction parties. BRIEF DESCRIPTION OF DRAWINGS
[0023] Fig. 1Structure diagram of a flue formwork system and a back bar.
[0024] Fig. 2 Structure diagram of a flue formwork system according to an embodiment of the present application.
[0025] Fig. 3 Disassembly diagram of a flue formwork system according to an embodiment of the present application.
[0026] Fig. 4 Sectional view of a flue formwork system according to an embodiment of the present application.
[0027] Fig. 5 Structure diagram of a back bar according to an embodiment of the present application.
[0028] Fig. 6 Structure diagram of a back bar and a flue main formwork according to an embodiment of the present application.
[0029] BRIEF DESCRIPTION OF THE DRAWINGS
[0030] 1. flue formwork system; 10. flue main formwork; 11. first screw rod; 12. first cavity; 20. flue corner formwork; 30. flue area; 100. back bar; 110. mounting portion; 111. bottom wall; 112. side wall; 120. limiting portion; 121. horizontal edge; 122. folded edge; 130. first fixed connection hole; 140. second fixed connection hole. DETAILED DESCRIPTION
[0031] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those specifically described herein, and the present application is not limited to the embodiments described below. It is to be understood that other embodiments can be employed and structural and functional modifications can be made without departing from the scope of the present application.
[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0033] In addition, the terms "first", "second", and the like, if any, are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicating the number of indicated technical features. Thus, a feature defined with "first", "second" may include at least one of the features explicitly or implicitly. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0034] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0035] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.
[0036] It should be noted that if an element is referred to as "fixed to" or "disposed to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.
[0037] It is found through research that in the related art, the problem of smoke leakage and water seepage of the flue formwork system has been a common headache, and the traditional flue construction method has many drawbacks. For example, there is a gap between the traditional flue and the structure floor, which needs to be treated by secondary hoisting hole. However, the quality of the hoisting hole is often difficult to guarantee, and it is easy to cause seepage and smoke leakage. In addition, in the traditional flue construction, the butt joint part is usually in a disconnected state at the unloading position of the floor steel bar support, and the gap at the butt joint of the two face flues against the wall is difficult to completely seal. This leads to an increase in the original smoke leakage points and a great risk of smoke leakage. From the smoke test results of previous projects, the effect of this traditional construction method is often unsatisfactory.
[0038] Due to the small internal space of the flue, construction personnel cannot enter it to install and disassemble the formwork, which brings great challenges to construction. How to realize one-time concrete forming of the flue, wall and floor, thereby improving production efficiency, assembly efficiency and project construction efficiency, reducing the cumbersome process of secondary construction, and reducing construction cost, has become a difficult problem to be solved.
[0039] Referring to Figs. 1-6 , Figs. 1-4 a structural schematic diagram of a flue formwork system 1 in an embodiment of the present application is shown, Figs. 5-6 a structural schematic diagram of a back brace 100 in an embodiment of the present application is shown. The back brace 100 provided by the embodiment of the present application prevents water seepage and smoke leakage of the flue. The back brace 100 includes a mounting portion 110 and a limiting portion 120.
[0040] The mounting portion 110 is arranged in the first cavity 12 of the flue main formwork 10, the bottom surface of the mounting portion 110 abuts against the panel of the flue main formwork 10, and the upper edge of the mounting portion 110 does not exceed the side plate of the flue main formwork 10. The limiting portion 120 is provided with at least two, each of which is arranged at the upper edge of the mounting portion 110 and extends to both sides from the mounting portion 110, the limiting portion 120 spans the side plate of the flue main formwork 10 and the side plate of the flue corner formwork 20 adjacent to both sides, and the end of the limiting portion 120 can limit the flue corner formwork 20.
[0041] The above-mentioned back brace 100 and the flue formwork system 1 adopting the back brace 100, the mounting portion 110 is arranged in the first cavity 12 of the flue main formwork 10, and most of the structure of the back brace 100 is embedded in the main formwork, so that the back brace 100 realizes hidden design and can adapt to smaller space, so that the activity space of the formwork is larger and the subsequent formwork disassembly is more convenient. For example, it has been verified that under the same formwork size (the width of the flue formwork system is 400mm), Fig. 1The maximum diameter of the flue area in the traditional flue formwork system is only 162mm, while the maximum diameter of the flue area of the flue formwork system of the application is 226mm, which greatly improves the size of the flue area.
[0042] By designing the limiting part 120 structure, the flue corner formwork 20 is limited, the formwork is reinforced, and the formwork is prevented from being misaligned, so that the flue corner formworks 20 on both sides and the flue main formwork 10 in the middle are connected into one body; the back ridge 100 can be integrally formed, the structure is simple, only a few components are needed, even if a multi-part welding method is used, it is convenient for processing, and it is more convenient for aluminum mold design and construction.
[0043] Integrated construction reduces secondary construction, can realize one-time concrete forming of the flue and the wall and the floor, avoids the cumbersome process of secondary construction, effectively reduces construction risks, improves the safety and reliability of the building, fundamentally solves the gap problem caused by secondary construction, effectively eliminates the seepage and smoke leakage risks; the back ridge 100 and the flue formwork system 1 using the back ridge 100 have high standardization and high matching precision, which can ensure the perfect fit of the flue and the wall and the floor, avoid the generation of gaps, thereby effectively reducing smoke leakage points and improving construction quality; no mechanical equipment is needed during construction, there is no construction waste and noise pollution, which meets the national low-carbon emission reduction requirements, is friendly to the surrounding environment, can be recycled, not only reduces material costs, but also reduces the cost of later maintenance caused by seepage and smoke leakage problems, and brings significant economic benefits to developers and construction parties.
[0044] The flue formwork system 1 comprises flue main formworks 10 and flue corner formworks 20. The flue main formworks 10 are provided with a plurality of flue corner formworks 20. The flue corner formworks 20 are arranged between adjacent flue main formworks 10 and form flue areas 30 together with the flue main formworks 10. The flue main formworks 10 and the flue corner formworks 20 both comprise side plates, face plates, end plates and reinforcing ribs arranged transversely on the face plates. The difference between the flue main formworks 10 and the flue corner formworks 20 lies in the shape of the face plates. The face plates of the flue main formworks 10 are flat, and the face plates of the flue corner formworks 20 are L-shaped. The flue corner formworks 20 are C-slot structures, which can be more conveniently disassembled from the flue main formworks 10. The side plates are vertically arranged at both edges of the face plates, and the end plates are vertically arranged at the other two edges of the face plates. The side plates and the end plates enclose a cavity on the face plates. The reinforcing ribs are arranged parallel to the end plates and perpendicular to the side plates. The reinforcing ribs divide the cavity into a plurality of first cavities.
[0045] In one embodiment, the side plates of the flue main formwork 10 and the side plates of the flue corner formwork 20 are arranged at an angle, and the opening between the side plates of the flue main formwork 10 and the side plates of the flue corner formwork 20 is arranged towards the flue area 30 to facilitate disassembly of the formworks. Specifically, the bottom ends (the ends away from the flue area 30) of the side plates of the flue main formwork 10 and the side plates of the flue corner formwork 20 abut each other to form a closed formwork system, and the top ends (the ends towards the flue area 30) of the side plates of the flue main formwork 10 and the side plates of the flue corner formwork 20 are separated to form the opening. Preferably, the angle between the side plates of the flue main formwork 10 and the side plates of the flue corner formwork 20 is 5-20°, and can be 8°, 10°, or 12°.
[0046] In other embodiments, when the flue main formwork 10 does not have reinforcing ribs, the first cavity is formed by the side plates and the end plates of the flue main formwork 10.
[0047] In one embodiment, the backrest 100 is integrally formed, for example, by extrusion molding.
[0048] In one embodiment, the mounting portion 110 includes a bottom wall 111 and a side wall 112. The bottom wall 111 is arranged against the panel of the flue main formwork 10, and the side wall 112 is arranged vertically on the bottom wall 111. The limiting portion 120 is arranged on the side wall 112, and the side wall 112 is arranged towards the first cavity 12. The edges of the side wall 112 and the bottom wall 111 are arranged against the side plates of the flue main formwork 10.
[0049] Specifically, the mounting portion 110 has a bottom wall 111, and the length of the bottom wall 111 is less than or equal to the width of the first cavity 12 of the flue main formwork 10. When the length of the bottom wall 111 is less than the width of the first cavity 12 of the flue main formwork 10, the two ends of the bottom wall 111 have a gap with the side plates of the flue main formwork 10. When the length of the bottom wall 111 is equal to the width of the first cavity 12 of the flue main formwork 10, the two ends of the bottom wall 111 are arranged against the side plates of the flue main formwork 10. The first cavity 12 is defined as a slot-shaped area surrounded by the side plates, the panel, and the transverse reinforcing ribs of the flue main formwork 10. One side of the bottom wall 111 is attached to the panel of the flue main formwork 10 as the bottom surface of the mounting portion 110.
[0050] The mounting portion 110 is provided with at least one side wall 112. Specifically, the mounting portion 110 is provided with two side walls 112, which are arranged at two edges of the bottom wall 111 towards the direction of the end plate (or the reinforcing rib), so that the mounting portion 110 has a C-shaped or N-shaped overall structure. The side wall 112 is perpendicular to the bottom wall 111, or the side wall 112 is arranged at an angle with the bottom wall 111. The length of the side wall 112 is less than or equal to the width of the first cavity 12 of the flue main formwork 10. When the length of the side wall 112 is less than the width of the first cavity 12 of the flue main formwork 10, the two ends of the side wall 112 have a gap with the side plate of the flue main formwork 10. When the length of the side wall 112 is equal to the width of the first cavity 12 of the flue main formwork 10, the two ends of the side wall 112 abut against the side plate of the flue main formwork 10. The length of the side wall 112 can be different from the length of the bottom wall 111.
[0051] In one embodiment, the bottom wall 111 and the side wall 112 of the back 100 are connected, for example, by welding. The side wall 112 can be integrally arranged with the limiting portion 120.
[0052] In other embodiments, the side wall 112 is provided with a plurality of side walls. In addition to the two side walls 112 arranged at two edges of the bottom wall 111 towards the direction of the end plate (or the reinforcing rib), the remaining side walls 112 can be arranged at the edges of the bottom wall 111 towards the direction of the side plate, so that the mounting portion 110 has a square groove shape or the like.
[0053] In one embodiment, the bottom wall 111 is provided with a first fixing hole 130 for connecting the panel, and the first fixing hole 130 is provided with a first bolt. Correspondingly, the flue main formwork 10 is provided with a through hole, and the first bolt passes through the first fixing hole 130 and the through hole of the flue main formwork 10 to connect the flue main formwork 10 and the bottom wall 111. The operator operates the first bolt 11 to control the disassembly of the flue main formwork 10. In this way, the first bolt can be screwed from the outside, which is in line with the mounting portion 110, so as to play a reinforcing role. A first nut can be sleeved on the first bolt, which is used to reinforce the connection of the first bolt, and the first nut can be fixed on the bottom wall 111. When disassembling the formwork, first, the first bolt is unscrewed, then the flue main formwork 10 on four sides is pushed towards the center of the flue area 30, and then the flue main formwork 10 is lifted, and finally the corner easy-to-disassemble C-groove flue corner formwork 20 is disassembled, so that the disassembly process of the formwork is completed.
[0054] In one embodiment, the side wall 112 is provided with a second fixed hole 140 for connecting the reinforcing rib of the main template 10 of the flue, the second fixed hole 140 is provided with a second bolt. Correspondingly, the reinforcing rib is provided with a through hole, the second bolt passes through the second fixed hole 140 and the through hole of the reinforcing rib to connect the reinforcing rib and the backrest 100. The operator operates the first screw rod 11 to control the disassembly of the main template 10 of the flue. The second bolt can be sleeved with a second nut for reinforcing the connection of the second bolt, and the second nut can be fixed to the side wall 112.
[0055] In one embodiment, the limiting part 120 is transversely arranged on the upper edge of the mounting part 110, and the limiting part 120 includes a part abutting the mounting part 110 and a part extending beyond the mounting part 110. The part of the limiting part 120 abutting the mounting part 110 increases the height of the mounting part 110, which exceeds the side plate of the main template 10 of the flue. The part of the limiting part 120 extending beyond the mounting part 110 spans the side plate of the main template 10 of the flue and the side plate of the flue corner template 20 adjacent to both sides. Specifically, the part of the limiting part 120 extending beyond the mounting part 110 extends beyond the side plate of the flue corner template 20. Therefore, when the main template 10 of the flue moves away from the flue area 30 under the action of the first bolt, the limiting part 120 can limit the main template 10 of the flue and the flue corner template 20 to be connected tightly without misalignment. When the main template 10 of the flue moves towards the flue area 30 under the action of the first bolt, the limiting part 120 does not limit the movement of the main template 10 of the flue, and the main template 10 of the flue can be conveniently separated from the flue corner template 20.
[0056] In one embodiment, the difference between the length of the limiting part 120 and the width of the main template 10 of the flue is 20-100 mm; and / or, the height of the limiting part 120 is 5-50 mm. Specifically, the width of the main template 10 of the flue is 100-280 mm, and the length of the part of the limiting part 120 extending beyond the main template 10 of the flue is 20-100 mm. Preferably, when the width of the main template 10 of the flue is 250 mm, the difference between the length of the limiting part 120 and the width of the main template 10 of the flue, i.e. the length of the part of the limiting part 120 extending beyond the main template 10 of the flue, is 21.5 mm.
[0057] In one embodiment, the limiting part 120 includes a horizontal edge 121 and a folded edge 122. The horizontal edge 121 abuts against the edge of the main template 10 of the flue and the edges of the flue corner templates 20 on both sides. The folded edge 122 is arranged at an angle with the horizontal edge 121, and the folded edge 122 extends into the second cavity of the flue corner template 20 to engage the main template 10 of the flue and the flue corner template 20.
[0058] Specifically, the second cavity flue corner template 20 is surrounded by the groove-shaped area formed by the side plate, the face plate and the end plate. The transverse edge 121 and the folded edge 122 are both parts of the limiting portion 120 extending from the mounting portion 110. The folded edge 122 is arranged at an angle with the transverse edge 121, and the folding direction of the folded edge 122 is towards the mounting portion 110. The folded edge 122 realizes the limiting of the flue corner template 20, and the length of the transverse edge 121 is consistent with the sum of the thickness of the side plate of the flue main template 10 and the side plate of the flue corner template 20, so that the folded edge 122 directly abuts against the side plate of the flue corner template 20 to limit in multiple directions.
[0059] In one of the embodiments, the angle α between the folded edge 122 and the transverse edge 121 is greater than or equal to 120°. Preferably, the angle α between the folded edge 122 and the transverse edge 121 can be 125°, 130°, 135°, 140°, 150°, etc.
[0060] In one of the embodiments, the limiting portion 120 includes the transverse edge 121 abutting against the edge of the flue main template 10 and the edges of the flue corner templates 20 on both sides, and the connecting portion at the end of the transverse edge 121, which clamps the side plate of the flue main template 10 and the side plate of the flue corner template 20. Specifically, as an alternative to the above-mentioned folded edge 122, the connecting portion is a quick-release clamping structure. When the first screw rod 11 is pushed to move the flue main template 10 towards the flue area 30, the connecting portion can be separated together with the side plate of the flue main template 10 and the side plate of the flue corner template 20, and vice versa.
[0061] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.
[0062] The above-mentioned embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A back batten for preventing water seepage and smoke leakage of a flue, characterized in that, The back bar comprises: a mounting portion arranged in the first cavity of the flue main template, the bottom surface of the mounting portion abutting the panel of the flue main template, and the upper edge of the mounting portion not exceeding the side plate of the flue main template; and a limiting portion, at least two of which are arranged on the upper edge of the mounting portion and extend from the mounting portion to both sides, the limiting portion spanning the side plate of the flue main template and the side plate of the flue corner template adjacent to both sides, and the end of the limiting portion being capable of limiting the flue corner template.
2. The back batten according to claim 1, wherein The mounting portion comprises a bottom wall and a side wall, the bottom wall abutting the panel of the flue main template, and the side wall being arranged vertically on the bottom wall, the limiting portion being arranged on the side wall, the side wall being arranged towards the first cavity, and the edges of the side wall and the bottom wall abutting the side plate of the flue main template.
3. The back batten according to claim 2, wherein, The bottom wall is provided with a first fixed connection hole for connecting the panel, and the first fixed connection hole is provided with a first bolt.
4. The back batten according to claim 2, wherein The side wall is provided with a second fixed connection hole for connecting the reinforcing rib of the flue main template, and the second fixed connection hole is provided with a second bolt.
5. The back batten according to claim 1, wherein The difference between the length of the limiting portion and the width of the flue main template is 20-100 mm; and / or, the height of the limiting portion is 5-50 mm.
6. The back batten of claim 1, wherein, The limiting portion comprises a horizontal edge and a folded edge, the horizontal edge abutting the edges of the flue main template and the flue corner templates adjacent to both sides, and the folded edge being arranged at an angle with the horizontal edge and extending into the second cavity of the flue corner template to engage the flue main template and the flue corner template.
7. The back batten according to claim 6, wherein The angle between the folded edge and the horizontal edge is greater than or equal to 120°.
8. The back batten of claim 1, wherein, The limiting portion comprises a horizontal edge and a connecting portion at the end of the horizontal edge, the horizontal edge abutting the edges of the flue main template and the flue corner templates adjacent to both sides, and the connecting portion engaging the side plate of the flue main template and the side plate of the flue corner template.
9. A flue formwork system characterised in that, The back bar comprises: a flue main template provided with a plurality of a flue corner template arranged between adjacent flue main templates to form a flue area with the flue main templates; and a back bar according to any one of claims 1-8. The side plate of the flue main template and the side plate of the flue corner template are arranged at an angle, and the opening between the side plate of the flue main template and the side plate of the flue corner template is arranged towards the flue area.
10. The flue formwork system of claim 9, wherein,