A prefabricated exhaust gas duct assembly and a construction method thereof

Abstract

The application provides a prefabricated interface piece of a smoke exhaust air duct, and relates to the technical field of smoke exhaust air duct splicing. The interface piece comprises an outer plate and an inner plate, both of which are in a frame shape. The inner plate is sleeved in the outer plate and coaxial with the center line. One end of the inner plate is fixedly connected with the outer plate through a connecting piece. A cavity is left between the inner plate and the outer plate for pouring and forming the end of the smoke exhaust air duct. One end of the inner plate is inwardly closed to form a first positioning part. The same end of the outer plate is outwardly extended and then bent along the center line direction towards the first positioning part to form a second positioning part. A blocking plate is installed in the cavity. The blocking plate is in close contact with the outer wall surface of the inner plate and the inner wall surface of the outer plate to seal the cavity. The application solves the problem of poor air tightness after the splicing of the smoke exhaust air duct in the prior art.

Description

Technical Field

[0001] This invention relates to the technical field of flue gas duct splicing, and in particular to a pre-embedded interface component for prefabricated flue gas ducts and its construction method. Background Technology

[0002] A smoke exhaust duct is a vertical pipe used to remove kitchen fumes or bathroom odors. In existing buildings, smoke exhaust ducts are mostly assembled from four side panels into a vertical pipe, which is usually rectangular. The fumes enter the pipe and then exit upwards.

[0003] During installation, first place the exhaust duct vertically against the wall, then align the two adjacent exhaust duct sections vertically end to end, and place steel bars at the connection point to support it on the floor slab for temporary fixation. Finally, fill the gap with concrete to complete the final fixation.

[0004] In practice, the end faces of conventional concrete flue gas ducts are uneven. When two flue gas duct sections are vertically aligned and spliced, many gaps will inevitably appear at the splicing surface, leading to smoke leakage during subsequent use. To improve the sealing performance of the flue gas duct, existing technologies can fill the splicing surface with concrete or apply mortar before / after splicing the two flue gas duct sections vertically. However, with the above sealing method, the side of the flue gas duct closest to the wall cannot be filled after the flue gas duct is joined. In addition, the flue gas duct is prone to loosening and misalignment during the joining process, which can cause the filled concrete to fall off or shift and create new gaps. As a result, the overall airtightness of the existing flue gas duct is still poor after installation, and there are still phenomena such as air leakage and smoke crosstalk. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the first objective of this invention is to provide a pre-embedded interface component for prefabricated smoke exhaust ducts, which solves the problem of poor airtightness after splicing of existing smoke exhaust ducts.

[0006] According to an embodiment of the present invention, a pre-embedded interface component for a prefabricated smoke exhaust duct includes: an outer plate and an inner plate, both of which are frame-shaped, wherein...

[0007] The inner plate is fitted inside the outer plate and the two are on the same center line. One end of the inner plate and the outer plate are fixedly connected by a connector. A cavity is left between the inner plate and the outer plate for casting the end of the exhaust duct. One end of the inner plate is tapered inward to form a first positioning part. The same end of the outer plate first extends outward and then bends towards the first positioning part along its center line to form a second positioning part.

[0008] A sealing plate is installed inside the cavity, and the sealing plate is in contact with the outer wall surface of the inner plate and the inner wall surface of the outer plate to seal the cavity.

[0009] The technical principle of this invention is as follows: When casting and manufacturing the exhaust duct using a molding machine, the inner plate and outer plate are placed on one end of the mold. When the worker pours concrete into the molding machine, the concrete flows into the cavity left between the inner plate and the outer plate, so that the inner plate and the outer plate serve as embedded parts to form the end of the exhaust duct and participate in the subsequent installation together. When installing the exhaust duct, the end of the exhaust duct with the inner plate and the outer plate is placed upwards. Then, adhesive is filled between the first positioning part and the second positioning part, and the bottom end of another exhaust duct is quickly inserted between the first positioning part and the second positioning part along the inclined surface formed by the closing of the first positioning part. At the same time, the exhaust duct is positioned by the inclined surface. At this time, the ends of the two adjacent exhaust duct sections are completely submerged in the adhesive.

[0010] Compared with the prior art, the present invention has the following beneficial effects: by adding an inner plate and an outer plate integrally formed with the end of the exhaust duct, and using the inclined surface of the inner plate to quickly position the bottom of the adjacent exhaust duct, the loosening and misalignment of the exhaust duct during installation is reduced. At the same time, by filling the space between the first positioning part and the second positioning part with adhesive, the adhesive flows and surrounds the end of the exhaust duct. Since the adhesive filling in this structure is always located within the first positioning part and the second positioning part, the exhaust duct above it is inserted into the adhesive filling. Even if the exhaust duct is loosened or misaligned due to other external forces during installation, the concrete will not fall off or detach from the exhaust duct to form new gaps, thereby improving the airtightness between the exhaust ducts. In summary, the exhaust duct made using the present invention has better airtightness after splicing.

[0011] The present invention also provides another embodiment in which the sealing plate is detachably fixed to the inner plate and / or the outer plate.

[0012] The present invention also provides another embodiment, which further includes an interface end mold located at the other end of the exhaust duct to block that end, and a protrusion extending toward the inner plate is fixed on the outer edge of the interface end mold.

[0013] The present invention also provides another embodiment in which the first positioning part is further provided with a plurality of vent holes.

[0014] The present invention also provides another embodiment in which the length of the first positioning part along its center line is longer than the length of the second positioning part along its center line.

[0015] The present invention also provides another embodiment, wherein the connector is located on the end of the inner plate away from the first positioning part, and the connector includes multiple steel bars, the two ends of each steel bar being fixed to the outer wall surface of the inner plate and the inner wall surface of the outer plate, respectively.

[0016] The present invention also provides another embodiment in which the second positioning part is fixedly provided with two adjacent outer wall surfaces, and the two supporting ears are respectively located on the ends of the wall surfaces that are far apart.

[0017] The present invention also provides another embodiment in which one end of the sealing plate extends into the cavity, and the other end of the sealing plate is attached to the wall surface of the first positioning part.

[0018] The second objective of this invention is to provide a construction method for pre-embedded interface components of prefabricated smoke exhaust ducts, which solves the problem of poor airtightness after splicing of smoke exhaust ducts in the prior art.

[0019] According to an embodiment of the present invention, a construction method for pre-embedded interface components of a prefabricated smoke exhaust duct includes:

[0020] Construction is carried out using the pre-embedded interface components of the aforementioned prefabricated smoke exhaust duct, wherein...

[0021] Step 1: Install the inner plate and outer plate at one end of the molding machine, and then pour concrete into the molding machine so that the inner plate and outer plate are integrally formed with the flue gas duct and serve as the end of the flue gas duct.

[0022] Step 2: During assembly, place each exhaust duct with one end of the inner plate and one end of the outer plate facing upwards, and then fill the space between the first positioning part and the second positioning part located at the top of the exhaust duct with adhesive.

[0023] Step 3: Slide the upper exhaust duct downwards along the bevel formed by the inner end of the lower exhaust duct into the adhesive until it is locked in place by the bevel.

[0024] Compared with the prior art, the present invention has the following beneficial effects: by adopting the pre-embedded interface parts of the above-mentioned assembled smoke exhaust duct, the airtightness of the assembled smoke exhaust duct is better.

[0025] The present invention also provides another embodiment in which the sealing plate can be removed and taken out after the flue gas duct is cast. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the pouring state according to an embodiment of the present invention.

[0027] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0028] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 4An exploded view of the exhaust duct with inner and outer panels and interface end molds.

[0030] Figure 5 for Figure 4 A magnified view of a section at point B in the middle.

[0031] Figure 6 for Figure 4 A magnified view of a section at point C.

[0032] Figure 7 This is a schematic diagram of the structure when two adjacent exhaust ducts are joined together.

[0033] Figure 8 for Figure 7 A schematic diagram of the internal structure.

[0034] Figure 9 for Figure 8 A magnified view of a section at point D.

[0035] In the above figures: 1. Outer plate; 2. Inner plate; 3. First positioning part; 4. Second positioning part; 5. Sealing plate; 6. Interface end mold; 7. Protrusion; 8. Vent hole; 9. Reinforcing bar; 10. Support ear; 11. Smoke exhaust duct; 12. Mold making machine; 13. Inner mold; 14. Grouting channel; 15. Cavity. Detailed Implementation

[0036] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] like Figures 1 to 3 As shown, according to an embodiment of the present invention, a pre-embedded interface component for a prefabricated smoke exhaust duct includes: an outer plate 1 and an inner plate 2, both of which are rectangular frames, wherein...

[0038] The inner plate 2 and the outer plate 1 have parallel surfaces facing each other. The inner plate 2 is fitted inside the outer plate 1 and both are on the same center line. One end of the inner plate 2 and the outer plate 1 are fixedly connected by a connector. A cavity is left between the inner plate 2 and the outer plate 1 for the end of the exhaust duct 11 to be cast. In this embodiment, as shown... Figure 2 as well as Figure 3 As shown, the connector is located at the left end of the inner plate 2 and the outer plate 1. The connector includes multiple steel bars 9, with the two ends of each steel bar 9 fixed to the outer wall surface of the inner plate 2 and the inner wall surface of the outer plate 1, respectively. When concrete is poured into the cavity, the concrete can be mixed with the steel bars 9 to strengthen the connection between the inner plate 2 and the outer plate 1 and the exhaust duct 11. The right end of the inner plate 2 tapers inward to form the first positioning part 3. The right end of the outer plate 1 extends outward and then bends to the right along its centerline toward the first positioning part 3 to form the second positioning part 4, so that a sealed cavity that can accommodate concrete is left between the first positioning part 3 and the second positioning part 4.

[0039] like Figure 3 as well as Figure 5 As shown, a sealing plate 5 is installed inside the cavity. The sealing plate 5 is also rectangular. The sealing plate 5 fits against the outer wall of the inner plate 2 and the inner wall of the outer plate 1 to seal the cavity. In use, a support rod can be movably connected to one end of the molding machine 12. Then, the support rod is abutted against the end face of the sealing plate 5 away from the exhaust duct 11 to prevent the sealing plate 5 from sliding due to concrete pressure. Of course, the support rod can also be detachably fixed to the inner plate 2 and / or the outer plate 1 by bolts.

[0040] The above solution will be adopted:

[0041] When casting and fabricating the exhaust duct 11 using the molding machine 12, the inner plate 2 and the outer plate 1 are placed on one end of the mold. This allows the concrete to flow into the cavity between the inner plate 2 and the outer plate 1 when the worker pours concrete into the molding machine 12. The inner plate 2 and the outer plate 1 then serve as embedded parts to form the end of the exhaust duct 11 and participate in subsequent installation. When installing the exhaust duct 11, the end of the exhaust duct 11 with the inner plate 2 and the outer plate 1 is placed upwards, and then the space between the first positioning part 3 and the second positioning part 4 is filled. Adhesive, commonly concrete, is used to quickly insert the bottom end of another flue gas duct 11 into the space between the first positioning part 3 and the second positioning part 4 along the inclined surface formed by the closing of the first positioning part 3. At the same time, the flue gas duct 11 is positioned by the inclined surface and the inner plate 2. At this time, the ends of the two adjacent flue gas duct sections 11 are completely submerged in concrete. It should be understood that the inner plate 2 and the outer plate 1 can be pre-embedded in the flue gas duct 11 during manufacturing, or they can be manufactured separately and temporarily fixed at the end of the flue gas duct 11 before splicing the flue gas duct 11.

[0042] By adding an inner plate 2 and an outer plate 1 integrally formed with the end of the exhaust duct 11, and using the beveled surface of the inner plate 2 to quickly position the bottom of the adjacent exhaust duct 11, the loosening and misalignment of the exhaust duct 11 during installation is reduced. Simultaneously, by filling concrete between the first positioning part 3 and the second positioning part 4, the concrete flows and surrounds the end of the exhaust duct 11. Since the concrete filling in this structure is always located within the first positioning part 3 and the second positioning part 4, the exhaust duct 11 above it is inserted into the filled concrete. Even if the exhaust duct 11 is loosened or misaligned due to other external forces during installation, the concrete will not fall off or detach from the exhaust duct 11 to form new gaps, thereby improving the airtightness between the exhaust ducts 11. In summary, the exhaust duct 11 made using the present invention has better airtightness after splicing. At the same time, since the first positioning part 3 can temporarily fix the adjacent exhaust ducts 1 during use, there is no need to set up additional steel reinforcement structures to support the adjacent connected exhaust ducts 1 on the floor slab during assembly, making it more convenient to use.

[0043] Furthermore, to facilitate workers in aligning and splicing the upper and lower exhaust ducts 11, the first positioning part 3 is extended so that the length of the first positioning part 3 along its center line is longer than the length of the second positioning part 4 along its center line. In this structure, by lengthening the first positioning part 3, workers can more quickly lower the upper exhaust duct 11 onto the inclined surface of the first positioning part 3 and slide it down for positioning.

[0044] The present invention also provides another embodiment, such as Figure 3 As shown, the left end of the sealing plate 5 extends into the cavity, and the right end of the sealing plate 5 is attached to the wall of the first positioning part 3 and connected by bolt threads. In this structure, after the concrete is poured and formed, the bolts can be removed, and then the sealing plate 5 can be slid to the right to be taken out for reuse.

[0045] Furthermore, such as Figure 1 , Figure 2 as well as Figure 6 As shown, the present invention also includes an interface end mold 6, which is rectangular in shape. The interface end mold 6 is located at the left end of the exhaust duct 11 to seal the end. A protrusion 7 extending towards the inner plate 2 is fixed on the outer edge of the interface end mold 6. The protrusion 7 can be annular or a plurality of rectangular protrusions evenly distributed on the end face of the interface end mold 6. In use, the interface end mold 6 is fitted onto the inner mold 13 of the molding machine 12 and fixed with bolts (it should be understood that there are various conventional fixing methods, such as fixing with a support rod or installing a piston rod on the molding machine 12 for abutment fixation). Then, concrete is poured into the molding machine 12 to form the exhaust duct 11. At this time, one end of the exhaust duct 11 is recessed due to the aforementioned protrusion 7, forming a grouting channel 14, as shown in the figure. Figure 8 as well as Figure 9 As shown, after the two exhaust ducts 11 are connected, the concrete can flow through the grouting channel 14 into the cavity formed between the inner plate 2 and the outer plate 1, and into the cavity formed between the first positioning part 3 and the second positioning part 4, thereby enhancing the flow and sealing of the concrete.

[0046] The present invention also provides another embodiment, such as Figure 8 As shown, in order to reduce the impact of the first positioning part 3 on the smoke exhaust performance of the exhaust duct 11, the first positioning part 3 is also provided with a plurality of vertical ventilation holes 8 (it should be noted that even without the ventilation holes 8, although the exhaust duct 11 is provided with the inwardly tapering first positioning part 3, it can still meet the function of normal exhaust of kitchen smoke. The purpose of this embodiment is only to further enhance the smoke exhaust performance of the exhaust duct 11).

[0047] The present invention also provides another embodiment, such as Figure 4 as well as Figure 7As shown, to strengthen the connection between this exhaust duct 11 and the wall (the wall surface during actual installation is close to...), Figure 7 On the two sides of the right side of the exhaust duct 11, the two adjacent outer walls of the second positioning part 4 are respectively fixed with horizontal support ears 10, and the two support ears 10 are respectively located on the ends of the wall that are far apart. After the exhaust duct 11 is assembled, concrete needs to be applied again to connect the exhaust duct 11 to the wall. At this time, the support ears 10 can be inserted into the concrete, so that the stability of the exhaust duct 11 is improved.

[0048] The second objective of this invention is to provide a construction method for pre-embedded interface components of prefabricated smoke exhaust ducts, comprising:

[0049] Construction is carried out using the pre-embedded interface components of the aforementioned prefabricated smoke exhaust duct, wherein...

[0050] Step 1: Install the inner plate 2 and the outer plate 1 at one end of the molding machine 12, and then pour concrete into the molding machine 12 so that the inner plate 2 and the outer plate 1 are integrally formed with the flue gas duct 11 formed by the pouring and serve as the end of the flue gas duct 11. After the casting is completed, remove the sealing plate 5 for recycling.

[0051] Step 2: During assembly, place each exhaust duct 11 with the inner plate 2 and outer plate 1 facing upwards, and then fill the space between the first positioning part 3 and the second positioning part 4 located at the top of the exhaust duct 11 with adhesive (usually concrete).

[0052] Step 3: Slide the upper exhaust duct 11 downward along the inclined surface formed by the inner plate 2 of the lower exhaust duct 11 into the adhesive until it is locked and positioned by the inclined surface.

[0053] Compared with the prior art, the present invention has the following beneficial effects: by adopting the pre-embedded interface parts of the above-mentioned assembled smoke exhaust duct, the airtightness of the assembled smoke exhaust duct 11 is better.

[0054] The working process of this invention is as follows: When casting and fabricating the exhaust duct 11 using the molding machine 12, the inner plate 2 and the outer plate 1 are installed on one end of the molding machine using bolts or other baffles fixed on the molding machine. The interface end mold 6 is placed on the other end of the molding machine 12 and slidably inserted into the sealing plate 5 to seal the cavity between the inner plate 2 and the outer plate 1. Subsequently, when the worker pours concrete into the molding machine 12, the concrete flows into the cavity left between the inner plate 2 and the outer plate 1, so that the inner plate 2 and the outer plate 1 act as embedded parts to form the end of the exhaust duct 11 and participate together with it. After the exhaust duct 11 is cast and formed, the sealing plate 5 can be removed for reuse. When installing the exhaust duct 11, place the exhaust duct 11 with the inner plate 2 and the outer plate 1 facing upwards, then fill the space between the first positioning part 3 and the second positioning part 4 with concrete, and quickly insert the bottom end of another exhaust duct 11 into the space between the first positioning part 3 and the second positioning part 4 along the slope formed by the closing of the first positioning part 3. At the same time, the exhaust duct 11 is positioned by the slope and the inner plate 2. At this time, the ends of the two adjacent exhaust duct sections 11 are completely submerged in the concrete.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pre-embedded interface component for a prefabricated smoke exhaust duct, characterized in that... It includes: an outer panel (1) and an inner panel (2) both of which are frame-shaped, wherein, The inner plate (2) is fitted inside the outer plate (1) and the two are on the same center line. One end of the inner plate (2) and the outer plate (1) are fixedly connected by a connector. A cavity is left between the inner plate (2) and the outer plate (1) for casting one end of the exhaust duct (11). One end of the inner plate (2) is tapered inward to form a first positioning part (3). The same end of the outer plate (1) first extends outward and then bends along its center line toward the first positioning part (3) to form a second positioning part (4). A sealing plate (5) is installed inside the cavity. The sealing plate (5) is attached to the outer wall surface of the inner plate (2) and the inner wall surface of the outer plate (1) to seal the cavity. The sealing plate (5) is detachably fixed to the inner plate (2) and / or the outer plate (1). One end of the sealing plate (5) extends into the cavity, and the other end of the sealing plate (5) is attached to the wall surface of the first positioning part (3). The other end of the exhaust duct (11) is recessed to form a grouting channel (14). The adhesive flows through the grouting channel (14) in the cavity formed between the inner plate (2) and the outer plate (1) and in the cavity formed between the first positioning part (3) and the second positioning part (4).

2. The pre-embedded interface component for a prefabricated smoke exhaust duct as described in claim 1, characterized in that... It also includes an interface end mold (6), which is located at the other end of the exhaust duct (11) to block the end. The outer edge of the interface end mold (6) is fixed with a protrusion (7) extending toward the inner plate (2).

3. The pre-embedded interface component for a prefabricated smoke exhaust duct as described in claim 1, characterized in that... The first positioning part (3) is also provided with multiple ventilation holes (8).

4. The pre-embedded interface component for a prefabricated smoke exhaust duct as described in any one of claims 1-3, characterized in that... The length of the first positioning part (3) along its center line is longer than the length of the second positioning part (4) along its center line.

5. The pre-embedded interface component for a prefabricated smoke exhaust duct as described in claim 1, characterized in that... The connector is located on the end of the inner plate (2) away from the first positioning part (3). The connector includes multiple steel bars (9), and the two ends of each steel bar (9) are respectively fixed on the outer wall surface of the inner plate (2) and the inner wall surface of the outer plate (1).

6. The pre-embedded interface component for a prefabricated smoke exhaust duct as described in claim 4, characterized in that... The second positioning part (4) has two adjacent outer wall surfaces with lugs (10) fixed on them respectively, and the two lugs (10) are located on the ends of the wall surfaces that are far apart.

7. A construction method for pre-embedded interface components of a prefabricated smoke exhaust duct, characterized in that... ,include: Construction is carried out using the pre-embedded interface component of the prefabricated smoke exhaust duct as described in claim 1, wherein, Step 1: Install the inner plate (2) and the outer plate (1) at one end of the molding machine (12), and then pour concrete into the molding machine (12) so that the inner plate (2) and the outer plate (1) are integrally formed with the flue gas duct (11) formed by the pouring and serve as the end of the flue gas duct (11); Step 2: During assembly, place each exhaust duct (11) with one end having the inner plate (2) and the outer plate (1) facing upwards, and then fill the space between the first positioning part (3) and the second positioning part (4) located at the top of the exhaust duct (11) with adhesive; Step 3: Slide the upper exhaust duct (11) downward along the slope formed by the inner plate (2) of the lower exhaust duct (11) into the adhesive until it is locked and positioned by the slope.

8. The construction method for the pre-embedded interface component of the prefabricated smoke exhaust duct as described in claim 7, characterized in that... The sealing plate (5) can be removed and taken out after the flue gas duct (11) is cast.

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