Adjustable tool type template at flue and air duct hole mounting position
By designing an adjustable tool-type template, the problems of unstable installation and inadequate sealing of flue gas duct openings were solved, achieving convenient installation, good sealing performance, and template recycling, thus reducing labor and material waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-03-17
AI Technical Summary
When installing existing flue gas duct openings, the formwork waterproofing is not securely installed, has poor stability, and insufficient sealing tightness. Furthermore, the formwork cannot be reused, leading to waste and increased labor requirements.
An adjustable tool-type template is adopted, including a first and second hanging template, adjustable holes and bolt fasteners. It is tightly connected to the gap of the flue and air duct through the L-shaped template, realizing self-hanging template and detachable installation, and adapting to reserved gaps of different sizes.
It achieves convenient formwork support and good sealing at the opening of the flue gas duct, supports the recycling of templates, and reduces labor requirements and material waste.
Smart Images

Figure CN224002331U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of formwork technology for flue gas duct openings, and in particular to an adjustable tool-type template for the installation of flue gas duct openings. Background Technology
[0002] Currently, in building construction, when installing flue gas ducts, a single upright is commonly used to support multi-layered panels cut to size according to the flue gas duct dimensions as the sealing formwork. This method of formwork installation is highly arbitrary, suffers from poor stability due to the single upright support, is not secure, and results in significant waste because the multi-layered panels cannot be reused. Furthermore, it requires substantial manual labor for installation and dismantling. Moreover, the sealing of pre-reserved joints is poor, leading to grout leakage. Therefore, a targeted design is needed to provide convenient formwork support, a tight seal, and reusability for pre-reserved joints at flue gas duct openings. Utility Model Content
[0003] This utility model provides an adjustable tool-type template for the installation of flue gas duct openings, which solves technical problems such as self-lifting template, adjustable sealing, and cyclic use of the lifting template at the installation of flue gas duct openings.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An adjustable tool-type template for the installation of a flue gas duct opening includes a first lifting form, a second lifting form adjustablely connected to the first lifting form, an adjustable hole disposed at the connection between the first and second lifting forms, and bolts that connect and pass through the adjustable hole.
[0006] The first lifting mold includes a first main lifting template and a first lifting mold clamping plate disposed at one end of the first main lifting template. The first main lifting template is straight, and the first main lifting template and the first lifting mold clamping plate are L-shaped. The other end of the first main lifting template away from the first lifting mold clamping plate is detachably connected to the second lifting mold. An adjustable hole is provided at the connection between the first main lifting template and the second lifting mold.
[0007] The second hoisting formwork includes a straight second main hoisting template, a first hoisting template clamping plate vertically connected to one end of the second main hoisting template fixing plate, and a second main hoisting template fixing plate vertically connected to the other end of the second main hoisting template and located on the opposite side of the first hoisting template clamping plate; the second main hoisting template fixing plate is detachably connected to the bolts installed on the adjustable holes on the first main hoisting template.
[0008] The first and second main formwork are connected in an L-shape, and the L-shape is connected to the cast-in-place wall in a U-shape. The width and length of the U-shape are set to correspond to the width and length of the flue.
[0009] The first formwork clamp and the second main formwork clamp are respectively inserted into the gap between the flue and the cast-in-place wall.
[0010] Furthermore, the smoke and air ducts are vertically installed between each floor and pass through the openings between each floor slab; a connecting tool-type template is installed below the reserved gap between the opening and the smoke and air duct.
[0011] Furthermore, both the first and second main formwork panels are right-angle corner pieces, the width of the horizontal part of the first and second main formwork panels is greater than the width of the reserved joint, and the horizontal part of the first and second main formwork panels is tightly attached to the lower part of the reserved joint of the opening.
[0012] Furthermore, the lengths of the first lifting mold clamping plate and the second lifting main mold clamping plate are respectively greater than the widths of the first lifting main template and the second lifting main template, and the length of the protruding section corresponds to the length of the insertion gap.
[0013] The thickness of the first lifting mold clamping plate and the second main lifting mold clamping plate are set to correspond to the width of the gap.
[0014] Furthermore, the outer surfaces of the first hoisting formwork clamp and the second main hoisting formwork clamp are in close contact with the surface of the structural wall, and the outer surfaces of the first hoisting formwork clamp and the second main hoisting formwork clamp are set as rough surfaces or are provided with anti-slip pads.
[0015] Furthermore, the bolt fastener includes a screw and a nut, the screw passing through and connecting the second main formwork plate and the first main formwork plate and being fastened to the first main formwork plate by the nut.
[0016] Furthermore, the second main formwork plate is provided with through holes, and there are two through holes.
[0017] Furthermore, the adjustable hole is an elongated elliptical hole, the length of which is adapted to the adjustable length of the first and second lifting molds; the width of which is adapted to the threaded connection of the screw.
[0018] The beneficial effects of this utility model are reflected in:
[0019] This utility model, through the design of a tool-type template, facilitates the formation of a self-lifting formwork to ensure the post-casting of the reserved gap at the flue gas duct opening; the detachable bolt fasteners of the first and second lifting forms facilitate convenient installation and disassembly, thus enabling recycling; the adjustable holes ensure adaptability during installation and facilitate clamping of the flue gas duct, making it suitable for reserved gaps of different sizes; the first and second lifting formwork clamping plates ensure that the tool-type template clamps the flue gas duct in a circumferential manner, further improving the installation stability of the template during tooling.
[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention; the main objectives and other advantages of this invention may be realized and obtained by means of the methods particularly pointed out in the description. Attached Figure Description
[0021] Figure 1 This is a horizontal cross-sectional view of the adjustable tool-type template installation at the flue gas duct opening.
[0022] Figure 2 It is a 3D illustration of a tool-style template. Figure 1 ;
[0023] Figure 3 It is a 3D illustration of a tool-style template. Figure 2 .
[0024] Attached reference numerals: 1-cast-in-place wall, 2-smoke and ventilation duct, 3-tool-type formwork, 31-first suspended formwork, 311-first suspended main formwork, 312-first suspended formwork clamping plate, 32-second suspended formwork, 321-second suspended main formwork, 322-second suspended main formwork clamping plate, 323-second suspended main formwork fixing plate, 33-adjustable hole, 34-bolt fastener, 4-pipe opening, 5-gap. Detailed Implementation
[0025] Taking a residential project as an example, this paper proposes an adjustable tool-type template for sealing the gap between the kitchen and bathroom ventilation duct openings and the ventilation duct itself. This template is used to form the formwork and then pour concrete over the pre-reserved gap. The ventilation duct dimensions for this project are 250mm × 250mm for the bathroom (350mm × 350mm for the kitchen), and the pre-reserved opening in the structural floor slab is 30mm wider than the ventilation duct.
[0026] like Figures 1 to 3 As shown, the adjustable tool-type template for the flue gas duct opening includes a first hanging form 31, a second hanging form 32 adjustablely connected to the first hanging form 31, an adjustable hole 33 located at the connection between the first hanging form 31 and the second hanging form 32, and bolts 34 connecting and passing through the adjustable hole 33. The flue gas duct 2 is vertically installed between each floor and passes through the opening 4 between each floor slab. The tool-type template 3 is installed below the reserved joint between the opening 4 and the flue gas duct 2. This tool-type template 3 is adjustable by sliding on one side and is secured with screws to hold the flue gas duct 2 against the bottom of the reserved opening 4 floor slab. A sponge strip is attached to the top to prevent grout leakage, and after secure fixing, concrete is poured to seal it.
[0027] In this embodiment, the first lifting mold 31 includes a first main lifting template 311 and a first lifting mold clamping plate 312 disposed on one side of the first main lifting template 311. The first main lifting template 311 is straight, and the first main lifting template 311 and the first lifting mold clamping plate 312 are L-shaped. The other end of the first main lifting template 311 away from the first lifting mold clamping plate 312 is detachably connected to the second lifting mold 32. An adjustable hole 33 is provided at the connection between the first main lifting template 311 and the second lifting mold 32.
[0028] In this embodiment, the second hoisting mold 32 includes a straight second main hoisting template 321, a first hoisting mold clamping plate 312 vertically connected to one end of the second main hoisting mold fixing plate 323, and a second main hoisting mold fixing plate 323 vertically connected to the other end of the second main hoisting mold and located on the opposite side of the first hoisting mold clamping plate 312; the second main hoisting mold fixing plate 323 is detachably connected to the bolt fastener 34 installed on the adjustable hole 33 on the first main hoisting template 311.
[0029] In this embodiment, the first main formwork 311 and the second main formwork 321 are connected in an L-shape, and the L-shape is connected to the cast-in-place wall 1 in a U-shape. The width and length of the U-shape are set to correspond to the width and length of the flue duct 2.
[0030] Both the first main formwork 311 and the second main formwork 321 are right-angle corner pieces. The width of the horizontal part of the first main formwork 311 and the second main formwork 321 is greater than the width of the reserved joint, and the horizontal part of the first main formwork 311 and the second main formwork 321 is closely connected to the lower part of the reserved joint of the opening 4.
[0031] In this embodiment, the first main formwork 311 and the second main formwork 321 use L63×2mm angle steel as the bottom formwork, which meets the width requirement of the gap 5; the angle steel serves as both the bottom formwork for pouring the gap 5 and the clamp for fixing.
[0032] In this embodiment, the first formwork clamping plate 312 and the second main formwork clamping plate 322 are respectively inserted into the gap 5 between the flue duct 2 and the cast-in-place wall 1. The lengths of the first formwork clamping plate 312 and the second main formwork clamping plate 322 are greater than the widths of the first main formwork 311 and the second main formwork 321, and the length of the protruding section corresponds to the length of the insertion into the gap 5; the thicknesses of the first formwork clamping plate 312 and the second main formwork clamping plate 322 are set to correspond to the width of the gap 5.
[0033] In this embodiment, the first formwork clamp 312 can extend 5cm from the corresponding angle steel end to act as a clamp for holding the flue duct 2. The outer surfaces of the first formwork clamp 312 and the second main formwork clamp 322 are in close contact with the surface of the structural wall, and the outer surfaces of the first formwork clamp 312 and the second main formwork clamp 322 are set as rough surfaces or are provided with anti-slip pads.
[0034] In this embodiment, the bolt fastener 34 includes a screw and a nut. The screw passes through and connects the second main hoisting mold plate 323 and the first main hoisting template 311, and is fastened to the first main hoisting template 311 by the nut. The second main hoisting mold plate 323 is provided with through holes, and there are two through holes corresponding to the screw.
[0035] In this embodiment, the adjustable hole 33 is an elongated elliptical hole, and the length of the adjustable hole 33 is adapted to the adjustable length of the first lifting mold 31 and the second lifting mold 32; the width of the adjustable hole 33 is adapted to the threaded connection of the screw.
[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A smoke shaft opening installation adjustable tool formwork, characterized in that, The first hanging die (31), the second hanging die (32) adjustably connected with the first hanging die (31), the adjustable hole (33) arranged at the connection of the first hanging die (31) and the second hanging die (32), and the bolt fastener (34) connected through the adjustable hole (33); The first hanging die (31) comprises a first hanging main die plate (311) and a first hanging die clamping plate (312) arranged at one side end of the first hanging main die plate (311), the first hanging main die plate (311) is linear, the first hanging main die plate (311) and the first hanging die clamping plate (312) are L-shaped, the other end of the first hanging main die plate (311) away from the first hanging die clamping plate (312) is detachably connected with the second hanging die (32), and the adjustable hole (33) is arranged at the connection of the first hanging main die plate (311) and the second hanging die (32). The second hanging die (32) comprises a second hanging main die plate (321) in a linear shape, a first hanging die clamping plate (312) vertically connected to one end of a second hanging main die plate (323), and a second hanging main die plate (323) vertically connected to the other end of the second hanging main die plate and located on the opposite side of the first hanging die clamping plate (312); the bolt fastener (34) mounted on the adjustable hole (33) on the first hanging main die plate (311) is detachably connected to the second hanging main die plate (323). The first hanging main die plate (311) and the second hanging main die plate (321) are L-shapedly connected, and the L-shaped connection corresponds to the mouth-shaped connection with the cast-in-place wall (1), and the width and length of the mouth-shaped type correspond to the width and length of the smoke flue (2). The first hanging die clamping plate (312) and the second hanging main die clamping plate (322) are respectively inserted and connected in the gap (5) between the smoke flue (2) and the cast-in-place wall (1).
2. A smoke shaft opening installation adjustable tool formwork according to claim 1, characterized in that, The smoke flue (2) is vertically arranged between each floor and penetrates the hole (4) between each floor slab; a tool type formwork (3) is installed below the reserved joint between the hole (4) and the smoke flue (2).
3. A smoke shaft opening installation adjustable tool formwork according to claim 2, characterized in that, The first hanging main die plate (311) and the second hanging main die plate (321) are both right-angle pieces, the width of the horizontal part of the first hanging main die plate (311) and the second hanging main die plate (321) is greater than the width of the reserved joint, and the horizontal part of the first hanging main die plate (311) and the second hanging main die plate (321) is tightly connected below the reserved joint of the hole (4).
4. A smoke shaft opening installation adjustable tool form according to claim 1, characterized in that, The length of the first hanging die clamping plate (312) and the second hanging main die clamping plate (322) is greater than the width of the first hanging main die plate (311) and the second hanging main die plate (321) respectively, and the length of the extended section corresponds to the length of the gap (5) into which it is inserted. The thickness of the first hanging die clamping plate (312) and the second hanging main die clamping plate (322) corresponds to the width of the gap (5).
5. A smoke shaft opening installation adjustable tool form according to claim 1, wherein, The outer side of the first hanging die clamping plate (312) and the second hanging main die clamping plate (322) tightly abuts the surface of the structural wall, and the outer side of the first hanging die clamping plate (312) and the second hanging main die clamping plate (322) is provided with a rough surface or an anti-skid pad.
6. A smoke shaft opening installation adjustable tool form according to claim 1, wherein, The bolt fastener (34) comprises a screw rod and a nut, the screw rod is connected with the second hanging main mold fixed plate (323) and the first hanging main mold plate (311) and is fastened to the first hanging main mold plate (311) through the nut.
7. A smoke shaft opening installation adjustable tool form according to claim 6, wherein, The second hanging main mold fixed plate (323) is provided with a through hole corresponding to the screw rod, and the through hole is provided with two.
8. A smoke shaft opening installation adjustable tool formwork according to claim 6, characterized in that, The adjustable hole (33) is an oblong hole, the length of the adjustable hole (33) is adapted to the adjustable length of the first hanging mold (31) and the second hanging mold (32), and the width of the adjustable hole (33) is adapted to the screw rod.