Rectangular prefabricated flue gas duct inner hoop connecting structure

Abstract

The utility model discloses a hoop connecting structure in a rectangular prefabricated flue gas duct, and relates to a steel skeleton and steel wire mesh reinforced machine-made flue construction technology. Comprising a floor slab (4) and machine-made flues (3), flue reserved holes are formed in the floor slab, and the upper-layer machine-made flue and the lower-layer machine-made flue are in butt joint at the positions of the flue reserved holes; the device further comprises an inner hoop (1), the inner hoop is of a rectangular frame structure formed by metal plates, and horizontally-arranged butt straps (11) are welded to the outer sides of the four side faces of the rectangular frame. The inner hoop is arranged at the butt joint position of the upper machine-made flue and the lower machine-made flue, the upper portion and the lower portion of the inner hoop are arranged in holes of the upper machine-made flue and the lower machine-made flue respectively, and the butt strap on the outer side of the inner hoop is arranged in a butt joint seam of the upper machine-made flue and the lower machine-made flue. The problems that in the installation process of an existing steel framework and steel wire mesh reinforced machine-made flue, slab staggering exists at the connecting position, and leakage exists at the interlayer connecting position are solved.

Description

Technical Field

[0001] This utility model relates to the construction technology of prefabricated flue in kitchens and bathrooms, specifically to the construction technology of steel frame and wire mesh reinforced mechanized flue. Background Technology

[0002] Existing prefabricated flue gas ducts, also known as machine-made cement flue gas ducts, machine-made exhaust ducts, integrally molded cement exhaust ducts, or integrally molded cement flue gas ducts, require traditional methods. These methods involve using Ф12 threaded steel bars for inter-layer support and unloading during the construction of rectangular prefabricated flue gas ducts. This creates gaps between upper and lower flue gas ducts, making vertical alignment during installation very difficult. This results in significant misalignment during construction and a tendency for leakage and cross-contamination of smoke and odors at inter-layer connections. Furthermore, these methods lead to long construction periods, high installation costs, and difficulties in warranty repairs and maintenance.

[0003] The latest industry standard JGT194-2018, "Exhaust Duct Products for Residential Kitchens and Bathrooms," has removed the fiberglass mesh reinforced cement exhaust duct standard from the previous standard JGT194-2006, section 5.2, on page 5, regarding raw material standards. Steel-framed, wire mesh reinforced machine-made exhaust ducts have become a common, standardized product in kitchens and bathrooms. While they are of high quality and strength, the installation of their joints requires manual, step-by-step alignment, resulting in low precision. After installation, gaps often appear between the reinforcing steel and the lower-level exhaust duct, and it's difficult to achieve a perfectly flush connection. Misalignment at the connection between the exhaust duct and the floor slab leads to high post-installation costs. Furthermore, misalignment between floors can cause material waste and incomplete sealing when pouring concrete into the exhaust duct during inter-floor sealing. This results in the common quality problem of smoke and odor leakage at the inter-floor connection points.

[0004] Chinese patent document CN219840325U discloses a concrete cantilever slab structure for the first-floor kitchen exhaust duct. This structure suspends the concrete columns of the first-floor kitchen exhaust duct and supports them with cantilever slabs. This allows the first-floor public exhaust duct to occupy only the space near the ceiling. Two sets of vertically staggered steel bars within the cantilever slab ensure that the adjacent side walls simultaneously support the concrete columns, offsetting the vertical stress on the concrete columns and providing good support and stability for the public exhaust duct. However, this patent only addresses the construction of the first-floor public exhaust duct. The aforementioned patent and existing technologies cannot solve the problems of misalignment at connection points and leakage at inter-layer connections during the installation of steel-framed, wire-mesh-reinforced mechanical exhaust ducts.

[0005] In view of the above, this utility model is hereby applied for. Utility Model Content

[0006] The utility model provides a rectangular prefabricated smoke flue inner sleeve hoop connecting structure, the utility model solves the problem that the existing steel skeleton, steel wire net reinforced type mechanism flue installation process exists connecting part misalignment, interlayer connecting place leakage.

[0007] To solve the above -mentioned problem, the utility model discloses the following technical scheme: a rectangular prefabricated smoke flue inner sleeve hoop connecting structure, including floor 4 and mechanism flue 3, and the floor 4 has the smoke flue reserved hole 41, and the upper and lower mechanism flue 3 is docked in the smoke flue reserved hole 41 position, still including inner sleeve hoop 1, and the inner sleeve hoop 1 is the rectangular frame structure of the metal plate composition, and the four lateral sides of rectangular frame are welded with the horizontal setting of the batten 11 outside, and the inner sleeve hoop 1 sets up in the upper and lower mechanism flue 3 docking position, and the upper and lower part of inner sleeve hoop sets up in the hole of upper and lower mechanism flue respectively, and the batten 11 outside inner sleeve hoop 1 sets up in the docking seam of upper and lower mechanism flue 3.

[0008] Further, the utility model discloses a rectangular prefabricated smoke flue inner sleeve hoop connecting structure still has the following characteristics: still including angle steel 2, and the smoke flue reserved hole 41 top is provided with at least two angle steels 2, and the both ends of angle steel 2 set up on the floor 4 of the edge of smoke flue reserved hole 41, and the horizontal side of angle steel 2 supports in the lower end of upper layer mechanism flue 3, and the vertical side of angle steel 2 is located the outside of mechanism flue 3.

[0009] The utility model has the advantages of:

[0010] The technical core of the utility model is that the inner sleeve hoop of the connecting and positioning device is made of metal iron plate, the device size is uniform, can be made in large quantities on site, the technical difficulty in the installation process is low, and general workers can operate.

[0011] Compared with the traditional mechanism flue interlayer installation process in the installation process of the upper layer mechanism flue, the utility model is more practical, the inner sleeve hoop device is simple to manufacture, convenient to install and accurate in positioning, the advanced process fundamentally eliminates the quality defects of interlayer misalignment and smoke leakage in the installation process of the mechanism flue, improves the one-time acceptance qualification rate of flue installation, and achieves the purposes of low cost and high efficiency.

[0012] While ensuring construction quality, the utility model saves materials, reduces waste and reduces engineering warranty costs, and has great benefits in energy saving, environmental protection and quality improvement, and is at the leading level in the province.

[0013] The utility model eliminates the quality defects of mechanism flue interlayer misalignment and smoke leakage, meets the design and relevant national standards, promotes the improvement of flue installation engineering construction technology, obtains the recognition of the owner and society, and has wide popularization and application value. DRAWINGS

[0014] Figure 1 is a perspective view of the inner sleeve clamp of the utility model;

[0015] Figure 2 is a sectional view of the inner sleeve clamp;

[0016] Figure 3 is a structural schematic view of the utility model;

[0017] Figure 4 is Figure 3 a local enlarged view of I;

[0018] Fig. 5 is an A-A sectional view of Fig. 3.

[0019] Symbol explanation in the drawing: inner sleeve clamp 1, clamping plate 11, filter chamfer 12, angle steel 2, fabricated flue 3, floor slab 4, flue reserved hole 41, building sealant 5, wall 6. DETAILED DESCRIPTION

[0020] The utility model will be described in detail with the best embodiment.

[0021] As Figures 1-5 shown, a rectangular prefabricated flue inner sleeve clamp connecting structure, comprising floor slab 4 and fabricated flue 3, floor slab 4 has flue reserved hole 41, upper and lower fabricated flue 3 butt joint at flue reserved hole 41 position; still include inner sleeve clamp 1, inner sleeve clamp 1 is the rectangular frame structure of metal sheet, the welding between the side steel sheet of rectangular frame, the four lateral sides of rectangular frame are welded with the clamping plate 11 of horizontal arrangement, the corner position of rectangular has 45 degree filter chamfer 12. Inner sleeve clamp 1 is arranged at the butt joint position of upper and lower fabricated flue 3, and the upper and lower parts of inner sleeve clamp are arranged in the hole of upper and lower fabricated flue respectively, and the clamping plate 11 outside inner sleeve clamp 1 is arranged in the butt joint of upper and lower fabricated flue 3, and building sealant 5 is arranged between inner sleeve clamp 1 and fabricated flue 3, and the building sealant adopts silicone building sealant.

[0022] The utility model still includes angle steel 2, and at least two angle steels 2 are arranged on flue reserved hole 41, and the two ends of angle steel 2 are arranged on the floor slab 4 of flue reserved hole 41 edge, and the horizontal side of angle steel 2 supports the lower end of upper fabricated flue 3, and the vertical side of angle steel 2 is located on the outside of upper fabricated flue 3. Two angle steels 2 are arranged on the inside of the opposite two edges of flue reserved hole parallel to each other, or two angle steels 2 are arranged on the inside of the adjacent two edges of flue reserved hole perpendicular to each other.

[0023] A metal sheet made of inner sleeve hoop is installed at the inner end of the mechanism flue, which is connected with the upper layer mechanism flue socket, and can realize the upper and lower layer mechanism flue mouth alignment flatness qualified rate 100%, and can also solve the risk of concrete pouring into the smoke flue in construction. In order to reduce the gap generated by the unloading steel at the flue interface, L30 angle steel is used as a supporting device, and after the completion of the flue, the net is hung and the glue is scraped at the connection with the wall body, forming a closed whole, which can prevent smoke and smell from being mixed.

[0024] The utility model discloses a mechanism flue mouth inner sleeve hoop connecting device is set up in combination with actual situation, guarantees the reliable safe support between smoke flue layers, guarantees the precision of installation and positioning between the upper and lower layers of smoke flue, reduces the construction difficulty, prevents the smoke flue layer interval error problem, and forms the rectangular prefabricated smoke flue inner sleeve hoop connection construction method.

[0025] The utility model discloses a construction method for the installation of rectangular prefabricated mechanism flue. The inner sleeve hoop is made of galvanized iron sheet and has uniform size and model, can be made on site, and can be mass-produced, has small technical difficulty and is easy to install, and can greatly improve the installation efficiency and accuracy of mechanism flue.

[0026] After the upper and lower layer flues are installed, the flue joint position and the gap between the flue and the two side walls are sealed with polymer cement mortar, and the outer periphery is pasted with 801 glue and mesh cloth, which solves the problem of interlayer smoke mixing and reverse smell caused by the installation error of the flue.

[0027] The traditional smoke flue installation interface position is all manually aligned step by step, the mouth connection precision is low, after the flue is installed, a gap is generated between the steel and the lower layer smoke flue, and it is difficult to achieve two flat surfaces without error. In view of the above problems, the upper and lower layer mechanism flues are positioned and connected through the inner sleeve hoop made of metal steel plate.

[0028] The size of the inner sleeve hoop is determined according to the size of the same batch of smoke flue products on site, and the inner sleeve hoop is welded on site; after welding a size, the inner sleeve hoop is mass-produced. The height of the inner sleeve hoop is 100mm, the material thickness is 1mm, and the inner sleeve hoop is welded by manual argon arc welding.

[0029] Construction process: construction preparation → floor hole finishing → flue preparation → installation of lower layer mechanism flue → installation of mechanism flue inner sleeve hoop, lower part of inner sleeve hoop inserted into lower layer mechanism flue, and building sealant arranged outside inner sleeve hoop → installation of unloading angle iron → installation of upper layer mechanism flue, lower end of upper layer mechanism flue inserted into upper part of inner sleeve hoop → temporary covering of flue mouth to prevent foreign matter from falling into the pipeline → quality inspection.

[0030] Application scope: the method is suitable for mechanism flues of residential buildings, schools, hospitals and other civil buildings.

[0031] Application and existing problems: Through data from multiple projects, it is found that the application of this construction technology solves the problems of low installation efficiency and positioning accuracy of mechanical flue, saves the labor cost of adjusting the flue at the connection multiple times in the wall body, and the device is made of metal iron plate welding, with uniform specifications, which can be mass-produced, saving materials, reducing waste, and reducing engineering maintenance costs while ensuring construction quality. It also has great benefits in energy saving, environmental protection, quality improvement, and improving owner satisfaction.

[0032] Benefit analysis: Compared with the original traditional method, this innovative process has obvious advantages, saves the labor cost of embedding supporting steel bars in the wall body and adjusting the flue at the connection multiple times, increases the positioning accuracy of the flue, reduces the risk of gaps not being tightly sealed due to inaccurate positioning, is simple and easy to operate, greatly shortens the construction period and labor, and saves engineering maintenance costs. After changing the construction structure, the construction efficiency is improved, the kitchen and bathroom rooms are not prone to leakage and smoke and odor defects, and it has good economic and social benefits.

[0033] Economic benefits: The development of this device saves 19% of the installation cost of mechanical flue in application projects, and shortens the installation period of the flue by 25%.

[0034] Social benefits: It improves the satisfaction of the owners, provides more advanced technical measures for the installation of mechanical flue, solves the negative impact caused by unqualified flue installation, and has significant social benefits.

[0035] After applying the rectangular prefabricated flue sleeve connection construction method, the quality problems of flue layer misalignment, interlayer connection leakage, and smoke and odor leakage are eliminated, the one-time qualified rate of mechanical flue installation is ensured, the installation efficiency and accuracy of mechanical flue are improved, the construction cost is effectively controlled, the engineering maintenance cost is reduced, the engineering quality and owner satisfaction are improved. It plays an important role in construction, and at the same time, it has achieved good social and economic benefits. This construction method has high efficiency and has a wide application prospect.

Claims

1. A rectangular prefabricated flue gas duct inner sleeve connection structure, comprising a floor slab (4) and a mechanized flue gas duct (3), wherein the floor slab (4) has a flue gas duct reserved hole (41), and the upper and lower mechanized flue gas ducts (3) are joined at the flue gas duct reserved hole (41); characterized in that: It also includes an inner sleeve (1), which is a rectangular frame structure made of metal plates. The four sides of the rectangular frame are welded with horizontally arranged ramps (11). The inner sleeve (1) is set at the joint position of the upper and lower machine flues (3). The upper and lower parts of the inner sleeve (1) are respectively set in the holes of the upper and lower machine flues (3). The ramps (11) on the outside of the inner sleeve (1) are set in the joint of the upper and lower machine flues (3). It also includes angle steel (2), at least two angle steels (2) are provided on the flue reserved hole (41), the two ends of the angle steel (2) are set on the floor slab (4) at the edge of the flue reserved hole (41), the horizontal side of the angle steel (2) is supported on the lower end of the upper mechanical flue (3), and the vertical side of the angle steel (2) is located on the outside of the upper mechanical flue (3).

2. The rectangular prefabricated flue gas duct inner sleeve connection structure as described in claim 1, characterized in that: The corners of the rectangle have a 45-degree chamfer (12).

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