Anti-backflow structure of outdoor air pipe

Abstract

The utility model relates to the technical field of outdoor air pipe backflow prevention, and discloses an outdoor air pipe backflow prevention structure which comprises an air shaft structure, a special-shaped air pipe is connected to one side of the air shaft structure, a rectangular air pipe is connected to one side of the special-shaped air pipe, and installation strips are fixed to the outer wall of the rectangular air pipe and the outer wall of the special-shaped air pipe. Fixing bolts are connected between the two sets of mounting strips in a threaded mode, the rectangular air pipe and the special-shaped air pipe are connected through the fixing bolts, a transparent hose is connected to a water drainage hole of the special-shaped air pipe, a hard water drainage pipe is connected to one side of the transparent hose, and the hard water drainage pipe and the transparent hose are connected to form a U-shaped trap. Accumulated water in the air pipe is prevented from flowing back into a room under the action of wind power and gravity; accumulated water in the air pipe is discharged through the drainage pipe arranged at the bottom of the special-shaped air pipe; the U-shaped trap is formed by the transparent hose and the drainage hard pipe, so that leakage of gas in the air pipe is reduced; rainwater backflow prevention of the outdoor air pipe is achieved.

Description

Technical Field

[0001] This utility model relates to the field of outdoor duct anti-backflow technology, specifically an outdoor duct anti-backflow structure. Background Technology

[0002] With the gradual changes in the ecological environment, summer rainstorms and high temperatures are becoming more frequent. Under the combined effects of high temperatures and heavy rain, outdoor ducts are prone to water seepage. Due to the wind force generated by the operation of the fan and the weight of the rainwater itself, the accumulated water will backflow into the room along the inner wall of the duct, causing damage to indoor equipment and decoration.

[0003] Outdoor ducts are pipe systems used for ventilation, exhaust, or air conditioning on the exterior of buildings or other structures. They are usually made of weather-resistant materials such as galvanized steel, stainless steel, or plastic to resist corrosion and damage from the external environment, expel stale indoor air, and introduce fresh air to maintain indoor air quality. However, in increasingly harsh natural environments, such as high temperatures and frequent heavy rains in summer, traditional outdoor ducts are prone to rainwater infiltration, and the water inside the duct is difficult to drain, leading to gas leakage and greatly reducing the practicality of traditional devices. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-backflow structure for outdoor air ducts, which solves the problem in the background art that in increasingly harsh natural environments, such as frequent high temperatures and heavy rain in summer, outdoor air ducts are prone to rainwater infiltration, and the water accumulation inside the air duct is not easy to remove, leading to the leakage of gas inside the air duct.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An outdoor duct anti-backflow structure includes a ventilation shaft structure. One side of the ventilation shaft structure is connected to an irregularly shaped duct, and one side of the irregularly shaped duct is connected to a rectangular duct. Mounting strips are fixed to the outer walls of both the rectangular and irregularly shaped ducts. Fixing bolts are screwed between the two sets of mounting strips, connecting the rectangular and irregularly shaped ducts. A transparent flexible tube is connected to the drain hole of the irregularly shaped duct, and a rigid drain pipe is connected to one side of the transparent flexible tube. The rigid drain pipe and the transparent flexible tube form a U-shaped water trap, enabling drainage and sealing of the duct.

[0007] Preferably, the outer wall of the irregularly shaped duct is provided with a duct support structure, which is used to support the irregularly shaped duct, and a guide plate that cooperates with the irregularly shaped duct is provided on one side of the ventilation shaft structure.

[0008] Preferably, the duct support structure includes a support component, a limiting component, and a plug-in component. The support component is located on both sides of the irregular duct and is used to support the irregular duct. The limiting component is located on the top of the support component and is used to limit the support component. The plug-in component is located on one side of the support component and is used to plug the support component in.

[0009] Preferably, the support assembly includes support arms disposed on both sides of the irregularly shaped air duct, with a support base fixed to the bottom of each of the two support arms, and a support plate inserted between the two support arms. The support plate corresponds to the bottom of the irregularly shaped air duct, and a handle is fixed to one side of the support plate.

[0010] Preferably, the limiting component includes a reinforcing rod installed on the top of two support arms, a retaining sleeve between the reinforcing rod and the support arm, connecting plates installed on both sides of the bottom of the retaining sleeve, positioning bolts screwed between the two connecting plates and the support arm, a limiting rod fixed inside the bottom of the retaining sleeve, the limiting rod being inserted into the reinforcing rod, and an insert rod fixed at the bottom of the reinforcing rod being inserted into the support arm.

[0011] Preferably, the plug-in assembly includes a storage base fixed to one side of the support arm, the storage base having a storage cavity inside, a plug plate being disposed inside the storage cavity, two counterweights being fixed to the top of the plug plate, a linkage plate being fixed to one side of the plug plate, a control rod being fixed to one side of the linkage plate, an opening slot for the linkage plate to move being provided on one side of the storage base, and the plug plate being plugged into the support plate.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0013] In increasingly harsh natural environments, with frequent high temperatures and torrential rains in summer, outdoor ducts are prone to rainwater infiltration. This device addresses this by using partially upturned, irregularly shaped ducts to prevent water from flowing back into the building under the influence of wind and gravity. A drainage pipe at the bottom of the duct drains the water out of the duct. A U-shaped water trap formed by a transparent flexible hose and a rigid drainage pipe reduces gas leakage from the duct. This system prevents rainwater from flowing back into outdoor ducts, making it suitable for outdoor ducts that enter indoor spaces via ventilation shafts. It not only prevents water from flowing back into the duct under the influence of wind and gravity but also allows for automatic drainage and reduces gas leakage. Furthermore, it provides technical support for the design of water supply systems in outdoor ducts to prevent backflow. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2This is a schematic diagram of the structure between the fixing bolt and the mounting strip of this utility model;

[0016] Figure 3 This is a schematic diagram of the duct support structure of this utility model;

[0017] Figure 4 This is a structural diagram of the support arm and reinforcing rod of this utility model when disassembled;

[0018] Figure 5 This is a schematic diagram of the structure of the reinforcing rod and the ferrule of this utility model during disassembly;

[0019] Figure 6 This is a cross-sectional view of the storage base of this utility model.

[0020] The components include: 1. ventilation shaft structure; 2. duct support structure; 3. rectangular duct; 4. irregular shaped duct; 5. fixing bolts; 6. transparent flexible hose; 7. mounting strips.

[0021] 21. Support arm; 22. Support base; 23. Support plate; 24. Reinforcing rod; 25. Handle; 26. Sleeve; 27. Storage base; 28. Insert rod; 29. ​​Positioning bolt; 210. Limiting rod; 211. Counterweight; 212. Control rod; 213. Insert plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figure 1 and Figure 2 An outdoor duct anti-backflow structure includes a ventilation shaft structure 1. A non-circular duct 4 is connected to one side of the ventilation shaft structure 1, and a rectangular duct 3 is connected to one side of the non-circular duct 4. Mounting strips 7 are fixed to the outer walls of both the rectangular duct 3 and the non-circular duct 4. Fixing bolts 5 are screwed between the two sets of mounting strips 7. The fixing bolts 5 connect the rectangular duct 3 and the non-circular duct 4. A transparent flexible tube 6 is connected to the drain hole of the non-circular duct 4. A drainage rigid pipe is connected to one side of the transparent flexible tube 6, and the drainage rigid pipe and the transparent flexible tube 6 are connected to form a U-shaped water trap. The drainage rigid pipe and the transparent flexible tube 6 realize the drainage of the duct and play a sealing role.

[0024] Please refer to Figure 3The outer wall of the irregular duct 4 is provided with a duct support structure 2, which is used to support the irregular duct 4. A guide plate that cooperates with the irregular duct 4 is provided on one side of the air shaft structure 1. The duct support structure 2 includes a support component, a limiting component and a plug-in component. The support component is located on both sides of the irregular duct 4 and is used to support the irregular duct 4. The limiting component is located on the top of the support component and is used to limit the support component. The plug-in component is located on one side of the support component and is used to plug the support component in.

[0025] A partially upturned 15° irregularly shaped air duct 4 is prefabricated in the prefabrication plant. The prefabricated 15° upturned irregularly shaped air duct 4 is used to prevent water from flowing back into the room under the action of wind and gravity. The blocked water is discharged through the drainage hole at the bottom of the air duct via the transparent flexible hose 6 and the drainage rigid pipe. The U-shaped water trap formed by the transparent flexible hose 6 and the drainage rigid pipe reduces the leakage of gas in the air duct, thus realizing the prevention of water backflow in the outdoor air duct.

[0026] Please also refer to... Figure 3 - Figure 6 The support assembly includes support arms 21 on both sides of the irregularly shaped duct 4. Support bases 22 are fixed to the bottom of each support arm 21, and a support plate 23 is inserted between the two support arms 21. The support plate 23 corresponds to the bottom of the irregularly shaped duct 4, and a handle 25 is fixed to one side of the support plate 23. The limiting assembly includes reinforcing rods 24 installed on the top of the two support arms 21. A retaining sleeve 26 is provided between the reinforcing rod 24 and the support arm 21. Connecting plates are installed on both sides of the bottom of the retaining sleeve 26. Positioning bolts 29 are screwed between the two connecting plates and the support arms 21. The bottom of the retaining sleeve 26 is fixed. There is a limit rod 210, which is inserted into a reinforcing rod 24. The bottom of the reinforcing rod 24 is fixed with an insertion rod 28, which is inserted into a support arm 21. The insertion assembly includes a storage seat 27 fixed to one side of the support arm 21. The storage seat 27 has a storage cavity inside, and an insertion plate 213 is provided inside the storage cavity. Two counterweights 211 are fixed to the top of the insertion plate 213, and a linkage plate is fixed to one side of the insertion plate 213. A control rod 212 is fixed to one side of the linkage plate. An opening slot for the linkage plate to move is provided on one side of the storage seat 27. The insertion plate 213 is inserted into a support plate 23.

[0027] Two support arms 21 are placed on both sides of the irregular duct 4 and supported by support bases 22. Support plates 23 are inserted into the two support arms 21 so that they correspond to the bottom of the irregular duct 4. Two insertion rods 28 are then inserted into the two support arms 21 so that the reinforcing rods 24 are placed on top of the two support arms 21. Two limiting rods 210 are then inserted into the top of the reinforcing rods 24 so that the sleeves 26 are placed on top of the reinforcing rods 24. The sleeves 26 are stably installed on top of the support arms 21 by screwing the positioning bolts 29 into the support arms 21. The weight of the counterweight 211 causes the insertion plate 213 to move downward. The downward movement of the insertion plate 213 causes it to insert into the support plate 23, thereby limiting the position of the support plate 23. The control rod 212 can be used to move the insertion plate 213 upward, making it easy to remove the support plate 23.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An outdoor ventilation duct anti-backflow structure, comprising a ventilation shaft structure (1), characterized in that: One side of the ventilation shaft structure (1) is connected to a shaped air duct (4), and one side of the shaped air duct (4) is connected to a rectangular air duct (3). The outer walls of the rectangular air duct (3) and the shaped air duct (4) are both fixed with mounting strips (7). Fixing bolts (5) are screwed between the two sets of mounting strips (7). The fixing bolts (5) connect the rectangular air duct (3) and the shaped air duct (4). A transparent hose (6) is connected to the drain hole of the shaped air duct (4). A drainage hard pipe is connected to one side of the transparent hose (6), and the drainage hard pipe and the transparent hose (6) are connected to form a U-shaped water trap. The drainage hard pipe and the transparent hose (6) realize the drainage of the air duct and play a sealing role.

2. The outdoor wind pipe anti-inversion structure according to claim 1, characterized in that: The outer wall of the irregular duct (4) is provided with a duct support structure (2), which is used to support the irregular duct (4). A guide plate that cooperates with the irregular duct (4) is provided on one side of the air shaft structure (1).

3. The outdoor wind pipe anti-inversion structure according to claim 2, characterized in that: The duct support structure (2) includes a support component, a limiting component and a plug-in component. The support component is located on both sides of the irregular duct (4) and is used to support the irregular duct (4). The limiting component is located on the top of the support component and is used to limit the support component. The plug-in component is located on one side of the support component and is used to plug the support component.

4. The outdoor wind pipe anti-inversion structure according to claim 3, characterized in that: The support assembly includes support arms (21) set on both sides of the irregular duct (4), and support bases (22) are fixed at the bottom of the two support arms (21). A support plate (23) is inserted between the two support arms (21). The support plate (23) corresponds to the bottom of the irregular duct (4), and a handle (25) is fixed on one side of the support plate (23).

5. The outdoor wind pipe anti-inversion structure according to claim 3, characterized in that: The limiting assembly includes a reinforcing rod (24) installed on the top of two support arms (21). A retainer (26) is provided between the reinforcing rod (24) and the support arm (21). Connecting plates are installed on both sides of the bottom of the retainer (26). Positioning bolts (29) are screwed between the two connecting plates and the support arm (21). A limiting rod (210) is fixed at the bottom inside the retainer (26). The limiting rod (210) is inserted into the reinforcing rod (24). An insert rod (28) is fixed at the bottom of the reinforcing rod (24). The insert rod (28) is inserted into the support arm (21).

6. The outdoor wind pipe anti-inversion structure according to claim 3, characterized in that: The plug-in assembly includes a storage base (27) fixed to one side of the support arm (21). The storage base (27) has a storage cavity inside, and a plug plate (213) is provided inside the storage cavity. Two counterweights (211) are fixed to the top of the plug plate (213), and a linkage plate is fixed to one side of the plug plate (213). A control rod (212) is fixed to one side of the linkage plate. An opening slot for the linkage plate to move is provided on one side of the storage base (27). The plug plate (213) is plugged into the support plate (23).

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