Roof steam vent insect-proof structure
By combining the insect-proof netting components with the exhaust pipe structure, the problem of insect prevention in the roof exhaust pipe was solved, achieving both insect prevention and smooth exhaust, reducing maintenance costs, and meeting the requirements of green building.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ELITE ARCHITECTURAL CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-07
AI Technical Summary
Existing roof vent pipes lack effective insect-proof design, allowing mosquitoes, spiders, and other insects to enter and hatch their nests. Furthermore, galvanized wire mesh is prone to rust and holes, losing its insect-proof function and being difficult to maintain.
Design an exhaust pipe structure including vertical, horizontal and inclined sections, combined with a detachable insect-proof screen assembly. The insect-proof screen is clamped between an outer frame and an inner frame made of PVC material to form an insect-proof screen assembly, which is easy to install and can be partially replaced.
It effectively prevents mosquitoes and other insects from entering the exhaust pipe, reduces maintenance costs, extends service life, conforms to the concept of green building, ensures smooth exhaust, and prevents rainwater and snowmelt from entering.
Smart Images

Figure CN224468681U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building technology, specifically to an insect-proof structure for roof venting. Background Technology
[0002] Currently, roof insulation venting systems use φ50 galvanized steel pipes or prefabricated PVC pipes as venting pipes, which can be straight or curved. Most venting pipes lack insect-proof design, allowing mosquitoes, spiders, and other small animals to enter. Insect eggs hatch and form nests, or fallen leaves or dust clog the pipes, causing vent malfunctions. A few galvanized steel pipes are welded with galvanized wire mesh, but this mesh is prone to rust and holes, losing its insect-proof function. Rust residue mixed with insect carcasses further clogs the venting pipes, offering limited insect protection. Furthermore, galvanized wire mesh is difficult to maintain and repair. Utility Model Content
[0003] The purpose of this invention is to provide an insect-proof structure for roof vents that has an insect-proof effect.
[0004] The purpose of this utility model is achieved as follows.
[0005] The roof vent insect-proof structure includes a vent pipe, which has a vertical section. The top of the vertical section has at least one set of horizontal and inclined sections. The inner end of the horizontal section is connected and fixed to the top of the vertical section, and the top of the inclined section is connected and fixed to the outer end of the horizontal section. The vertical, horizontal and inclined sections are internally connected to form a venting channel. The bottom of the inclined section has a downward-sloping vent, which is connected to the venting channel. The vent is equipped with a detachable insect-proof net assembly, and the vent is connected to the outside through the mesh of the insect-proof net assembly.
[0006] Furthermore, the insect-proof net assembly includes an outer frame, an inner frame, and a detachable insect-proof screen. The outer periphery of the outer frame and the inner periphery of the vent are detachably connected. The inner frame is inserted into the inner periphery of the outer frame from the inner end. The outer periphery of the inner frame and the inner periphery of the outer frame clamp the edge of the insect-proof screen.
[0007] Both the insect-proof netting components and the insect-proof screen can be replaced individually. The modular design allows for replacement of damaged parts without requiring complete disassembly or skilled workers, reducing the risk of inconsistent construction quality. The concealed design of the insect-proof netting components makes them less susceptible to damage from impacts, and the exhaust pipe layout is neat and orderly.
[0008] Furthermore, the outer frame has external threads on its outer periphery, and the exhaust port has internal threads on its inner periphery. The external and internal threads are connected to form a detachable connection between the outer frame and the exhaust port.
[0009] The insect netting components are easy and simple to install and replace, requiring no professional workers and reducing the cost of subsequent maintenance.
[0010] Furthermore, both the outer frame and the inner frame are circular. The outer frame has a first step on its inner circumference, and the first step has a first clamping slope. The inner frame has a second clamping slope on its outer end. The first clamping slope and the second clamping slope have the same angle. The inner end of the inner frame has a limiting part. The insect screen covers the inner end of the outer frame. The inner end of the inner frame is inserted into the outer frame to push the insect screen into the outer frame. The outer circumference of the inner frame, the inner circumference of the outer frame, the first clamping slope, and the second clamping slope clamp the insect screen, which is placed against the limiting part and the inner end face of the outer frame.
[0011] The insect-proof screen is easy and simple to install and replace, requiring no professional workers and reducing the cost of subsequent maintenance.
[0012] Furthermore, the bottom of the inclined section expands outward to form a mounting section, the inner diameter of which is larger than the inner diameter of the inclined section. The inner diameters of the inclined section, the horizontal section, and the vertical section are the same, and the exhaust port is formed at the mounting section. The exhaust passage allows for smooth exhaust.
[0013] Furthermore, the outer frame, inner frame, and insect-proof screen are all made of PVC. This ensures a long service life and rust resistance.
[0014] Furthermore, the mesh size of the insect-proof screen is 16-32 mesh.
[0015] It effectively prevents insects such as mosquitoes and spiders from entering the exhaust pipe.
[0016] Furthermore, the inclined section is set at a downward 45° angle, and the vent and insect screen assembly are also set at a 45° angle. The vent pipe is curved, which facilitates the smooth discharge of vapor from the insulation layer, ensures a balanced internal airflow environment, and effectively prevents rainwater and snowmelt from entering the vent pipe. This reduces the amount of snowmelt entering the pipe and freezing, avoiding frost heave and cracking.
[0017] Furthermore, the top of the vertical section is provided with two sets of horizontal sections and inclined sections. The two horizontal sections are symmetrically arranged in a straight line, and the inner ends of the two horizontal sections and the top of the vertical section are interconnected. The outer end of each horizontal section is connected to the top of the corresponding inclined section. Each inclined section has a vent and an insect-proof net assembly at its bottom, thereby improving the venting effect.
[0018] Furthermore, a sleeve is provided at the bottom of the vertical section, which is used for the insertion and connection of the roof riser. The roof flashing extends beyond the sleeve to the vertical section. The vent pipe is simple and easy to install.
[0019] This utility model's exhaust pipe design effectively prevents rainwater and snowmelt from entering the exhaust pipe, reducing the amount of snowmelt that freezes inside and avoids frost heave and cracking. The exhaust pipe and insect net assembly are installed separately, allowing for partial replacement of relevant parts, maximizing the use of raw materials, reducing resource waste, and aligning with national energy conservation, emission reduction, and green building concepts. The insect net assembly provides excellent insect protection and, being a fragile component, facilitates future maintenance and replacement. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1.
[0021] Figure 2 This is the front view of Embodiment 1.
[0022] Figure 3 This is a side view of Embodiment 1.
[0023] Figure 4 This is a schematic cross-sectional view of the exhaust port and insect net assembly after installation in Example 1.
[0024] Figure 5 This is a cross-sectional structural diagram of the exhaust pipe in use in Example 1. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] Example 1, see Figure 1-4 As shown, a roof vent insect-proof structure includes a vent pipe 1 and a vertical section 2, at least one set of horizontal sections 3, inclined sections 4, and an insect-proof net assembly 5. The inner end of the horizontal section 3 is connected and fixed to the top of the vertical section 2, and the top of the inclined section 4 is connected and fixed to the outer end of the horizontal section 3. The vertical section 2, the horizontal section 3, and the inclined section 4 are internally connected to form a venting channel 11. The bottom of the inclined section 4 is provided with a downward-sloping vent 10, which connects to the venting channel 11. The vent 10 is provided with a detachable insect-proof net assembly 5, which connects to the outside through the mesh of the insect-proof net assembly 5. The inclined section 4 is inclined downward at 45°, so that the vent 10 and the insect-proof net assembly 5 are inclined at 45°. The bottom of the vertical section 2 is provided with a sleeve section 21. The bottom of the inclined part 4 expands outward to form a mounting part 41. The inner diameter of the mounting part 41 is larger than the inner diameter of the inclined part 4. The inner diameters of the inclined part 4, the horizontal part 3 and the vertical part 2 are the same. The exhaust port 10 is formed at the mounting part 41.
[0027] In this embodiment, the top of the vertical part 2 is provided with two sets of horizontal parts 3 and inclined parts 4. The two horizontal parts 3 are arranged symmetrically in a straight line, and the inner ends of the two horizontal parts 3 and the top of the vertical part 2 are interconnected. The outer end of each horizontal part 3 is connected to the top of the corresponding inclined part 4. Each inclined part 4 has an exhaust port 10 and an insect-proof net assembly 5 at its bottom.
[0028] The insect-proof net assembly 5 includes an outer frame 6, an inner frame 7, and a detachable insect-proof screen 8. The outer periphery of the outer frame 6 and the inner periphery of the vent 10 are detachably connected. The inner frame 7 is inserted into the inner periphery of the outer frame 6 from its inner end. The outer periphery of the inner frame 7 and the inner periphery of the outer frame 6 clamp the edge of the insect-proof screen 8. Specifically, the outer periphery of the outer frame 6 is provided with an external thread 61, and the inner periphery of the vent 10 is provided with an internal thread 42. The threaded connection between the external thread 61 and the internal thread 42 constitutes a detachable connection between the outer frame 6 and the vent 10. Both the outer frame 6 and the inner frame 7 are circular. The outer frame 6 has a first step 62 on its inner circumference and a first clamping slope 63 on its first step 62. The inner frame 7 has a second clamping slope 72 on its outer end. The first clamping slope 63 and the second clamping slope 72 have the same angle. The inner end of the inner frame 7 has a limiting part 71. The insect screen 8 covers the inner end of the outer frame 6. The inner end of the inner frame 7 is inserted into the outer frame 6 to push the insect screen 8 into the outer frame 6. The outer circumference of the inner frame 7 and the inner circumference of the outer frame 6, as well as the first clamping slope 63 and the second clamping slope 72, clamp the insect screen 8 respectively and place it against the limiting part 71 and the inner end face of the outer frame 6.
[0029] Preferably, after eliminating installation errors, the inner diameters of the outer frame 6 and inner frame 7 are the same as the inner diameter of the inclined part 4, ensuring smooth exhaust through the exhaust channel. The outer frame 6, inner frame 7, and insect screen 8 are all made of PVC. The mesh count of the insect screen 8 is 16-32 mesh, specifically, the aperture of the insect screen 8 is ≤0.5mm.
[0030] See Figure 5 As shown, the roof is provided with an insulation layer 100 and a waterproof layer 200, and the venting riser 9 of the insulation layer 100 is vertically installed. The venting pipe 1 is inserted into the top of the riser 9 through the sleeve part 21, and the roof flashing termination 300 extends beyond the sleeve part 21 to the vertical part 2 to ensure the waterproof effect.
[0031] The terms used in this utility model, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are only used for distinction.
[0032] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.
[0033] In this utility model, terms indicating direction or location such as front end, rear end, top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are used to indicate relative positions rather than absolute positions.
[0034] Terms used in this invention, such as "approximately," "overall," "approximately," and "similar," are limiting terms used to indicate features that exist but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context.
Claims
1. A roof venting insect-proof structure, including a venting pipe (1), characterized in that, The exhaust pipe (1) includes a vertical part (2), the top of the vertical part (2) is provided with at least one set of horizontal part (3) and inclined part (4), the inner end of the horizontal part (3) is connected and fixed to the top of the vertical part (2), the top of the inclined part (4) is connected and fixed to the outer end of the horizontal part (3), the vertical part (2), the horizontal part (3) and the inclined part (4) are connected to form an exhaust channel (11), the bottom of the inclined part (4) is provided with an inclined downward exhaust port (10), the exhaust port (10) is connected to the exhaust channel (11), the exhaust port (10) is provided with a detachable insect net assembly (5), and the exhaust port (10) is connected to the outside through the mesh of the insect net assembly (5).
2. The roof vent insect-proof structure according to claim 1, characterized in that, The insect-proof net assembly (5) includes an outer frame (6), an inner frame (7), and a detachable insect-proof screen (8). The outer periphery of the outer frame (6) and the inner periphery of the exhaust port (10) are detachably connected. The inner frame (7) is inserted into the inner periphery of the outer frame (6) from the inner end. The outer periphery of the inner frame (7) and the inner periphery of the outer frame (6) clamp the edge of the insect-proof screen (8).
3. The roof vent insect-proof structure according to claim 2, characterized in that, The outer frame (6) has an external thread (61) on its outer periphery and the exhaust port (10) has an internal thread (42) on its inner periphery. The external thread (61) and the internal thread (42) are connected to form a detachable connection between the outer frame (6) and the exhaust port (10).
4. The roof vent insect-proof structure according to claim 2, characterized in that, Both the outer frame (6) and the inner frame (7) are circular. The outer frame (6) has a first step (62) on its inner circumference and a first clamping slope (63) on its first step (62). The inner frame (7) has a second clamping slope (72) on its outer end. The first clamping slope (63) and the second clamping slope (72) have the same angle. The inner end of the inner frame (7) has a limiting part (71). The insect screen (8) is covered by the inner end of the outer frame (6). The inner end of the inner frame (7) is inserted into the outer frame (6) to push the insect screen (8) into the outer frame (6). The outer circumference of the inner frame (7) and the inner circumference of the outer frame (6), the first clamping slope (63) and the second clamping slope (72) clamp the insect screen (8) respectively, and place it against the limiting part (71) and the inner end face of the outer frame (6).
5. The roof vent insect-proof structure according to claim 2, characterized in that, The bottom of the inclined part (4) expands outward to form the mounting part (41). The inner diameter of the mounting part (41) is larger than the inner diameter of the inclined part (4). The inner diameters of the inclined part (4), the horizontal part (3), and the vertical part (2) are the same. The exhaust port (10) is formed at the mounting part (41).
6. The roof vent insect-proof structure according to claim 2, characterized in that, The outer frame (6), inner frame (7) and insect screen (8) are all made of PVC.
7. The roof vent insect-proof structure according to claim 2, characterized in that, The mesh size of the insect-proof screen (8) is 16-32 mesh.
8. The roof vent insect-proof structure according to claim 1, characterized in that, The inclined part (4) is set at a downward inclination of 45°, and the exhaust port (10) and the insect net assembly (5) are set at an inclination of 45°.
9. The roof vent insect-proof structure according to claim 1, characterized in that, The top of the vertical part (2) is provided with two sets of horizontal parts (3) and inclined parts (4). The two horizontal parts (3) are arranged symmetrically in a straight line, and the inner ends of the two horizontal parts (3) and the top of the vertical part (2) are interconnected. The outer end of each horizontal part (3) is connected to the top of the corresponding inclined part (4). Each inclined part (4) has an exhaust port (10) and an insect net assembly (5) at its bottom.
10. The roof vent insect-proof structure according to claim 1, characterized in that, The bottom of the vertical part (2) is provided with a sleeve part (21), which is used for the roof riser (9) to be inserted and matched. The roof flashing end (300) extends past the sleeve part (21) to the vertical part (2).