Double-layer galvanized steel sheet air pipe structure

Abstract

The utility model relates to the technical field of air pipes, in particular to a double-layer galvanized steel sheet air pipe structure which comprises an air pipe body, the air pipe body is formed by connecting an outer-layer galvanized steel sheet and an inner-layer galvanized steel sheet, and a gap between the outer-layer galvanized steel sheet and the inner-layer galvanized steel sheet forms a heat insulation cavity. Connecting flanges are arranged at the sealing positions of the two ends of the outer-layer galvanized steel plate and the inner-layer galvanized steel plate; a bent plate is arranged at one end of the inner-layer galvanized steel plate, and the bent plate is bent towards the outer side and wraps the heat insulation cavity; an air inducing groove is formed between the other end of the inner-layer galvanized steel plate and the connecting flange and communicates with the heat insulation cavity, a spoiler is arranged on the air inducing groove, the side, facing the connecting flange, of the spoiler is obliquely arranged, and a plurality of silencing holes are formed in the spoiler. According to the utility model, the inner and outer layers of galvanized steel sheet structures are adopted, and the heat insulation cavity is filled with the heat insulation material, so that sound transmission is effectively isolated, the heat insulation performance is obviously improved, and the energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a double-layer galvanized steel plate air duct structure. Background Art

[0002] With the acceleration of urbanization and the continuous improvement of people's requirements for living comfort, ventilation and air-conditioning systems inside buildings have received more and more attention, resulting in the extensive use of air ducts in ventilation and air-conditioning systems. Traditional air duct materials and structures often only focus on basic ventilation functions, generally using a single-layer galvanized steel plate structure, which can ensure ventilation while saving costs, but ignores the needs of energy saving, noise reduction and thermal insulation, resulting in increasingly prominent problems of noise pollution and poor thermal insulation.

[0003] In recent years, some new duct materials have appeared on the market, attempting to ensure ventilation while taking into account noise reduction and thermal insulation. Existing ducts mostly adopt a double-layer structure, which can achieve a certain thermal insulation effect. However, condensation will still occur when this type of duct is in use. Ultimately, the thermal insulation effect is not good enough. Therefore, there are ducts on the market with an insulation layer on the outer surface of the steel plate to form an external insulation structure to improve its thermal insulation performance. However, the insulation layer of this structure is easy to fall off after long-term use, resulting in a significant reduction in the thermal insulation effect. At the same time, this structure also has problems such as high cost, difficult construction, and inconvenient maintenance. Utility Model Content

[0004] In order to solve the technical defects raised in the above-mentioned background technology, the purpose of the present invention is to provide a double-layer galvanized steel plate air duct structure to solve the problems of poor sound insulation and heat insulation effect of air duct materials, high construction cost, and difficult maintenance in the existing technology, so as to achieve the goal of high performance, low cost and easy construction of the air duct.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-layer galvanized steel plate air duct structure includes an air duct body, wherein the air duct body is composed of an outer galvanized steel plate and an inner galvanized steel plate connected to each other, and the gap between the outer galvanized steel plate and the inner galvanized steel plate forms an insulation cavity, and connecting flanges are provided at the two end seals of the outer galvanized steel plate and the inner galvanized steel plate, and two adjacent air duct bodies are connected and fastened by the connecting flange to form an air duct; a bent plate is provided at one end of the inner galvanized steel plate, and the bent plate is bent toward the outside and covers the insulation cavity; an air duct groove is provided between the other end of the inner galvanized steel plate and the connecting flange, the air duct groove is connected to the insulation cavity, and a spoiler is provided on the air duct, and the spoiler is inclined toward one side of the connecting flange, and a plurality of silencer holes are provided on the spoiler.

[0007] Preferably, the heat insulation cavity is filled with a pearlite wool layer for heat insulation, and the filling thickness of the pearlite wool layer is not less than 2-5 mm.

[0008] Preferably, the heat-insulating cavity is also filled with a sound-insulating cotton layer for silencing and reducing noise, and the sound-insulating cotton layer and the perlite cotton layer are stacked on each other.

[0009] Preferably, an embedded sealing strip is further provided at the joint of the air duct body, and the embedded sealing strip is embedded in the end face of the connecting flange.

[0010] Preferably, a plurality of waist-shaped holes are equidistantly provided on the connecting flange, and part of the connecting flange extends out of the port of the outer galvanized steel plate.

[0011] Preferably, a metal clip is provided on the outer surface of the outer galvanized steel plate at a position corresponding to the waist-shaped hole. The metal clip is an L-shaped structure, and a connecting hole is provided at one end of the metal clip that fits the connecting flange.

[0012] Preferably, the bent plate is integrally formed with the inner galvanized steel plate, and one end of the bent plate extends out of the outer galvanized steel plate and is welded and fixed thereto.

[0013] Preferably, the air duct body is also provided with a plurality of reinforcing flange rings for reinforcing the air duct body, and the plurality of reinforcing flange rings are equidistantly arranged on the outer surface of the outer galvanized steel plate.

[0014] In summary, the beneficial effects of the present invention are as follows:

[0015] The double-layer galvanized steel plate air duct structure of the present invention adopts an inner and outer layer of galvanized steel plate structure, and a filler is provided in the middle insulation cavity, which not only effectively isolates the sound propagation, but also significantly improves the thermal insulation performance and reduces energy loss; and the air flow is stirred by arranging spoilers at the joints of the air duct, and the noise generated when the air flow flows in the air duct is eliminated by the silencer holes opened, thereby ensuring the tightness and durability of the air duct connection, and effectively preventing the cold bridge phenomenon and heat loss; the air duct also has the advantages of simple structure, convenient installation, and wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the double-layer galvanized steel plate air duct structure of the utility model;

[0017] Figure 2 This is an axonometric drawing of a single double-layer galvanized steel plate air duct structure of the utility model;

[0018] Figure 3 This is a top view of the double-layer galvanized steel plate air duct structure of the utility model;

[0019] Figure 4 yes Figure 3 Sectional view of the AA plane;

[0020] Figure 5 yes Figure 4 A magnified view of the structure at point a.

[0021] Description of reference numerals in the figures:

[0022] 1. Outer galvanized steel plate; 2. Inner galvanized steel plate; 3. Connecting flange; 31. Waist-shaped hole; 4. Bent plate; 5. Air duct; 6. Spoiler; 61. Silencer hole; 7. Perlite wool layer; 8. Sound insulation wool layer; 9. Embedded sealing strip; 10. Metal buckle; 101. Connecting hole; 11. Reinforced flange ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0025] In the description of this utility model, if the word "several" or "several" is used, it means one or more, and "more" means two or more. "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the words "first," "second," and "third" is only for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] The following is combined with Figure 1-5 , an embodiment of a double-layer galvanized steel plate air duct structure of the utility model is further described in detail.

[0027] A double-layer galvanized steel plate air duct structure, such as Figure 5As shown, it includes an air duct body, which is composed of an outer galvanized steel plate 1 and an inner galvanized steel plate 2 connected to each other, and the gap between the outer galvanized steel plate 1 and the inner galvanized steel plate 2 forms an insulation cavity, and connecting flanges 3 are provided at the two end seals of the outer galvanized steel plate 1 and the inner galvanized steel plate 2, and two adjacent air duct bodies are connected and fastened by the connecting flanges 3 to form an air duct; a bending plate 4 is provided at one end of the inner galvanized steel plate 2, and the bending plate 4 is bent toward the outside and covers the insulation cavity; an air duct groove 5 is provided between the other end of the inner galvanized steel plate 2 and the connecting flange 3, and the air duct groove 5 is connected to the insulation cavity, and a spoiler 6 is provided on the air duct groove 5, which is inclined toward one side of the connecting flange 3, and a plurality of silencer holes 61 are provided on the spoiler 6.

[0028] Specifically, the outer galvanized steel plate 1 and the inner galvanized steel plate 2 are arranged in parallel, and together constitute the main structure of the air duct; the inner galvanized steel plate 2 is in direct contact with the ventilation gas, playing a guiding role; the air duct 5 opened between the inner galvanized steel plate 2 and the connecting flange 3 can introduce the noise generated by the air flow into the heat insulation cavity, and be absorbed and eliminated. At the same time, the spoiler 6 is set on the air duct 5 to disrupt the air flow passing through the joint of the two adjacent air duct bodies during ventilation, so that the air flow is cut into flocs, avoiding its clumping and impacting the joint of the branch body to generate noise. At the same time, the silencer hole can also eliminate the noise generated when the air flow flows in the air duct, which not only effectively isolates the sound propagation, but also significantly improves the thermal insulation performance and reduces energy loss.

[0029] In this embodiment, if Figure 2 As shown, the heat insulation cavity is filled with a pearlite wool layer 7 for heat insulation and heat preservation, and the filling thickness of the pearlite wool layer 7 is not less than 2-5 mm.

[0030] Specifically, the pearlite wool layer 7 has a thickness of not less than 2-5 mm. The pearlite wool layer 7 within this range can play a role in sound insulation and heat insulation, and reserve suitable space for the insulation cavity to absorb noise and isolate heat, while reducing the overall weight of the air duct and improving installation convenience.

[0031] In this embodiment, the heat-insulating cavity is further filled with a sound-insulating cotton layer 8 for silencing and reducing noise, and the sound-insulating cotton layer 8 and the pearlite cotton layer 7 are stacked on each other.

[0032] Specifically, when the air flow in the air duct body is flowing, heat and noise can be transferred to the insulation cavity through the silencer holes and greatly absorbed by the sound insulation cotton layer 8 and the perlite wool layer 7, thereby improving the heat insulation and sound reduction capabilities of the double-layer galvanized steel plate branch pipe.

[0033] In this embodiment, an embedded sealing strip 9 is further provided at the joint of the air duct body, and the embedded sealing strip 9 is embedded in the end surface of the connecting flange 3 .

[0034] Specifically, the embedded sealing strip 9 ensures the tight connection between the two adjacent air ducts, effectively preventing the invasion of outside air and moisture, while avoiding the loss of internal heat energy, ensuring the tightness and durability of the connection between the two adjacent air ducts, and effectively preventing cold bridge phenomenon and heat loss.

[0035] In this embodiment, a plurality of waist-shaped holes 31 are equidistantly formed on the connecting flange 3 , and a portion of the connecting flange 3 extends out of the end of the outer galvanized steel plate 1 .

[0036] Specifically, the purpose of setting the waist-shaped hole 31 is to reserve appropriate adjustment space when splicing the air ducts. When the two air duct bodies are spliced ​​through the connecting flange 3, the fastening bolts are passed through the waist-shaped hole 31 for positioning, and the docking position is adjusted according to the openings at both ends of the air duct body to ensure good sealing effect at the splicing.

[0037] In this embodiment, a metal clip 10 is provided on the outer surface of the outer galvanized steel plate 1 at a position corresponding to the waist-shaped hole 31. The metal clip 10 is an L-shaped structure, and a connecting hole 101 is provided at one end of the metal clip 10 that is attached to the connecting flange 3.

[0038] Specifically, a plurality of metal clips 10 are provided on the outer surface of a single air duct near both ends. The metal clips 10 can further improve the sealing of the air duct joint gaps, and at the same time can also improve the firmness of the joints, facilitate the rapid splicing of the air ducts to form air ducts, and improve the sealing effect of the air duct joints.

[0039] In this embodiment, the bent plate 4 and the inner galvanized steel plate 2 are formed as one piece, and one end of the bent plate 4 extends out of the outer galvanized steel plate 1 and is welded and fixed thereto.

[0040] Specifically, the bent plate 4 and the inner galvanized steel plate 2 are integrally formed, which can greatly improve their sturdiness. At the same time, it can also make the insulation cavity enclosed between the outer galvanized steel plate 1 and the inner galvanized steel plate 2 in a relatively sealed state, thereby improving the heat insulation and noise reduction functions of the air duct.

[0041] In order to further improve the strength of the air duct body, a plurality of reinforcing flange rings 11 for reinforcing the air duct body are also provided on the air duct body. The plurality of reinforcing flange rings 11 are equidistantly arranged on the outer surface of the outer galvanized steel plate 1. The reinforcing flange rings 11 can improve the anti-fall ability and stability of the air duct body, thereby solving the problems of the existing galvanized steel plate air duct reinforcement structure, such as poor reinforcement effect, large air duct deformation, easy air leakage, and poor ventilation effect, and effectively improving the service life of the air duct.

[0042] It is worth mentioning that the following steps are involved in the manufacture of double-layer sound insulation and heat insulation galvanized steel plate air ducts:

[0043] a. Material selection and prefabrication: Select galvanized steel sheets that meet national standards, perform precise cutting and shaping, and make them into outer galvanized steel sheet 1 and inner galvanized steel sheet 2, respectively, to ensure that the geometric dimensions are accurate;

[0044] b. Filling with heat insulation and sound-absorbing fillers: Fill the heat insulation cavity between the outer galvanized steel plate 1 and the inner galvanized steel plate 2 with pearlite wool and sound-absorbing wool of a predetermined thickness, ensuring that the filling is even without any gaps or looseness, so as to give full play to the sound insulation and heat insulation performance of the pearlite wool and sound-absorbing wool;

[0045] c. Assembly and sealing: A dedicated embedded sealing strip 9 is embedded in the connecting flange 3 to form a closed cavity when the duct body is spliced. High-strength waterproof tape is used to bond the joints between the outer galvanized steel sheet 1 and the inner galvanized steel sheet 2 to further enhance moisture and corrosion resistance and extend the service life of the duct.

[0046] d. Duct splicing: Align the metal clip 10 with the waist-shaped hole 31 on the connecting flange 3. Fasten the bolts through the metal clip 10 and then connect the flange 3. Ensure the joint is precisely aligned and form a sealed structure to reduce noise transmission.

[0047] e. Quality inspection and debugging: Conduct quality inspection on the final product, including appearance inspection, sealing performance test and pressure bearing capacity test, to ensure that each air duct meets the design standards and has no air leakage, water seepage or other quality problems.

[0048] The working principle of this utility model:

[0049] When installing a double-layer galvanized steel plate air duct, first set the outer galvanized steel plate 1 and the inner galvanized steel plate 2 in parallel, and use the connecting flange 3 to fix the two ends of the outer galvanized steel plate 1 and the inner galvanized steel plate 2 respectively for sealing. A wind inlet groove is left between the inner galvanized steel plate 2 and the connecting flange 3 at one end, and the perlite wool layer 7 and the sound insulation wool layer 8 are filled into the insulation cavity through the wind inlet groove, and the spoiler 6 is used to block the wind inlet groove 5; finally, by arranging an embedded sealing strip 9 on the connecting flange 3, the joints of the two adjacent air duct bodies can be sealed when they are spliced, preventing the noise generated when the air duct is working from flowing out from the joints, and the noise is introduced into the sound insulation wool layer 8 through the silencer hole 61 for absorption, thereby achieving the function of silencing and reducing noise.

[0050] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A double-layer galvanized steel plate air duct structure, comprising an air duct body, wherein the air duct body is composed of an outer layer of galvanized steel plate and an inner layer of galvanized steel plate connected to each other, and the gap between the outer layer of galvanized steel plate and the inner layer of galvanized steel plate forms an insulating cavity, characterized in that: Connecting flanges are provided at the sealing ends of the outer galvanized steel plate and the inner galvanized steel plate, and the two adjacent air duct bodies are connected and fastened by the connecting flange to form an air duct; a bending plate is provided at one end of the inner galvanized steel plate, and the bending plate is bent toward the outside and covers the heat insulation cavity; an air duct groove is provided between the other end of the inner galvanized steel plate and the connecting flange, and the air duct groove is connected to the heat insulation cavity, and a spoiler is provided on the air duct groove, and the spoiler is inclined toward one side of the connecting flange, and a plurality of silencer holes are provided on the spoiler.

2. The double-layer galvanized steel plate air duct structure according to claim 1 is characterized in that: The heat insulation cavity is filled with a pearlite wool layer for heat insulation and heat preservation, and the filling thickness of the pearlite wool layer is not less than 2-5 mm.

3. The double-layer galvanized steel plate air duct structure according to claim 2 is characterized in that: The heat insulation cavity is also filled with a sound insulation cotton layer for silencing and reducing noise, and the sound insulation cotton layer and the pearlite cotton layer are stacked on each other.

4. The double-layer galvanized steel plate air duct structure according to claim 3 is characterized in that: An embedded sealing strip is also provided at the joint of the air duct body, and the embedded sealing strip is embedded on the end surface of the connecting flange.

5. The double-layer galvanized steel plate air duct structure according to claim 4 is characterized in that: The connecting flange is provided with a plurality of waist-shaped holes at equal intervals, and a portion of the connecting flange extends out of the port of the outer galvanized steel plate.

6. The double-layer galvanized steel plate air duct structure according to claim 5, characterized in that: A metal clip is provided on the outer surface of the outer galvanized steel plate at a position corresponding to the waist-shaped hole. The metal clip is an L-shaped structure, and a connection hole is provided at one end of the metal clip that fits the connection flange.

7. The double-layer galvanized steel plate air duct structure according to claim 1, characterized in that: The bent plate is integrally formed with the inner galvanized steel plate, and one end of the bent plate extends out of the outer galvanized steel plate and is welded and fixed thereto.

8. The double-layer galvanized steel plate air duct structure according to claim 1, characterized in that: The air duct body is also provided with a plurality of reinforcing flange rings for reinforcing the air duct body, and the plurality of reinforcing flange rings are arranged equidistantly on the outer surface of the outer galvanized steel plate.

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