A straight exhaust duct

Abstract

The utility model relates to a wind pipe exhaust technology field especially a kind of straight exhaust wind pipe.A kind of straight exhaust wind pipe, including the roof of installation wind pipe body, the top of wind pipe body is fixed with adapter, adapter is used to support the sleeve pipe of the diameter greater than the top of wind pipe body, the top of wind pipe body exceeds the lower end of sleeve pipe, so that annular water storage tank is formed between wind pipe body and sleeve pipe.The adapter is also assembled with a sleeve pipe with a larger caliber than the top of wind pipe body, and the top of wind pipe body slightly extends the lower end of the sleeve pipe. In this way, an annular water storage tank is formed between the outside of the wind pipe body and the inside of the sleeve pipe, which can temporarily collect rainwater falling from the top of the sleeve pipe, preventing rainwater from directly entering the wind pipe and affecting the exhaust function, while providing a buffer space for subsequent rainwater discharge.

Description

Technical Field

[0001] This utility model relates to the field of air duct exhaust technology, and in particular to a direct exhaust air duct. Background Technology

[0002] In the field of duct exhaust technology, straight exhaust ducts are commonly used in building roof exhaust systems. Their core requirement is to achieve efficient exhaust while preventing rainwater from seeping into the room. Currently, to prevent rainwater from entering the room through the duct body, the mainstream design solution is to set the exhaust duct as a bent structure, which blocks rainwater from falling directly by changing the airflow path (such as adding horizontal sections, U-shaped bends, etc.).

[0003] While these types of bent exhaust ducts can provide some rain protection, they have significant drawbacks in practical applications, as follows: High exhaust resistance affects exhaust efficiency: The bending structure changes the natural flow direction of airflow, forming airflow vortices and resistance at the bend, which prevents the exhaust gas inside the building from being discharged quickly and smoothly. Especially in scenarios with high exhaust volume requirements, problems such as poor exhaust and indoor air pressure imbalance are likely to occur.

[0004] Dust and debris easily accumulate and clog the pipes, resulting in high maintenance costs: Dust and debris can easily accumulate on the inner walls of the pipes in the bends. Over time, this will gradually accumulate and clog the pipes, which will not only further reduce exhaust efficiency, but also require regular disassembly and cleaning of the pipes, increasing the manpower and time costs of maintenance.

[0005] Poor structural stability and high installation difficulty: Bent exhaust ducts require multiple connectors to fix pipe sections with different directions, making the overall structure more complex than straight exhaust ducts, and requiring higher precision during installation; in addition, long-term exposure to airflow impact, external wind force and temperature changes can cause the connectors at the bends to loosen and age, posing a safety hazard of pipe detachment.

[0006] Large space occupation and limited adaptability: The bending structure requires additional installation space to accommodate the turning part of the pipe section. It is difficult to arrange flexibly in scenarios with narrow roof space or other buildings nearby, resulting in low adaptability.

[0007] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a direct exhaust duct that has greater industrial value. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a direct exhaust duct.

[0009] This utility model discloses a direct exhaust duct, including a roof on which the duct body is installed. An adapter is fixed to the top of the duct body. The adapter is supported by a sleeve with a diameter larger than the top of the duct body. The top of the duct body extends beyond the lower end of the sleeve, so that an annular water storage tank is formed between the duct body and the sleeve.

[0010] This direct-vent duct is installed on the building roof. Its core component is a vertical duct body with an adapter at the top. This adapter is fitted with a sleeve with a larger diameter than the top of the duct body, and the top of the duct body slightly extends beyond the lower end of the sleeve. This creates a ring-shaped water storage tank between the outer side of the duct body and the inner side of the sleeve, which temporarily collects rainwater falling from the top of the sleeve, preventing rainwater from directly entering the duct and affecting the ventilation function, while also providing a buffer space for subsequent rainwater discharge.

[0011] Furthermore, the bottom of the sleeve that contacts the adapter has multiple through holes for draining rainwater from the water storage tank.

[0012] Multiple small holes are opened at the bottom of the sleeve where it contacts the adapter. These holes can drain the rainwater collected in the water storage tank in a timely manner, preventing the rainwater from accumulating too much in the water storage tank and overflowing. This further ensures that rainwater will not flow back into the duct and ensures that the duct always maintains a stable exhaust state.

[0013] Furthermore, the adapter includes an outwardly protruding support ring for supporting the sleeve.

[0014] The adapter has an outwardly protruding support ring that firmly supports the bottom of the sleeve, providing a solid installation foundation for the sleeve. This ensures that the sleeve maintains a stable position when receiving rainwater and resisting external wind forces, preventing the normal water collection and drainage functions of the water tank from being affected by the sleeve shaking or shifting, and thus ensuring the rainproof and ventilation stability of the entire duct structure.

[0015] Furthermore, the support ring has a vertically arranged annular outer retaining ring, which contacts the lower outer wall of the sleeve, and the outer retaining ring is provided with a water outlet hole that matches the through hole at the bottom of the sleeve.

[0016] The support ring is equipped with a vertically upward-facing outer retaining ring. This outer retaining ring fits tightly against the outer wall of the lower end of the sleeve, which not only provides lateral restraint to the sleeve and prevents it from shifting laterally during installation or use, but also precisely aligns with the through holes at the bottom of the sleeve. The water outlet on the outer retaining ring forms a continuous drainage channel with these through holes, allowing rainwater in the water storage tank to flow smoothly into the water outlet of the outer retaining ring through the through holes at the bottom of the sleeve and then be discharged smoothly, preventing rainwater from leaking or stagnating at the connection point, and further improving the overall structure's rainproof sealing and drainage efficiency.

[0017] Furthermore, multiple anchor points are evenly fixed around the duct body on the upper surface of the roof, and the lifting rings at the top of the anchor points are fixedly connected to the support rings on the outside of the adapter through cables.

[0018] Multiple fixed anchor points are evenly distributed around the duct body on the roof surface. The lifting ring at the top of each anchor point is connected to the support ring on the outside of the adapter through a cable. This connection method can form a stable pull on the adapter and sleeve from multiple directions, effectively offsetting the impact of external forces such as wind on the top structure of the duct, preventing the duct from loosening or shifting due to shaking, and thus enhancing the structural stability and wind resistance of the entire direct exhaust duct after installation.

[0019] Furthermore, a full circle of pull rings is fixed in the middle of the duct body, and the pull rings are fixedly connected to the hanging rings at the top of the anchor points by pull cables.

[0020] The duct body is equipped with a complete pull ring in the middle. This pull ring is connected to the top hanging ring of the anchor point on the roof through a cable. It can form a multi-directional traction fixation from the middle of the duct. In conjunction with the traction structure at the top, it further disperses the external force on the duct as a whole, and avoids the duct from shaking or bending due to its long length. This improves the installation firmness and structural stability of the entire duct in various environments.

[0021] Furthermore, a ring-shaped rain cover is fixed to the duct body near the top of the roof.

[0022] The duct body is equipped with a ring-shaped rain cover near the top of the roof. This rain cover can shield the connection between the duct body and the roof, effectively preventing rainwater from flowing down the outer wall of the duct to the installation gaps, and preventing rainwater from seeping into the room from the roof and the installation position of the duct, thus further enhancing the rainproof and sealing effect of the overall structure.

[0023] Furthermore, a raised leak-proof ring is installed at the contact point between the roof and the duct body, and the lower edge of the rain cover is located outside the leak-proof ring to prevent rainwater from seeping into the room from the installation location between the roof and the duct body.

[0024] A raised anti-leak ring is installed where the roof meets the duct body, and the lower edge of the rain cover is located on the outside of this anti-leak ring. The two work together to form double protection: the anti-leak ring can prevent rainwater from seeping into the installation gap between the duct and the roof from the base, and the rain cover further intercepts rainwater from the outside to prevent it from contacting the installation gap. The double protection completely prevents rainwater from seeping into the room from this position, and enhances the sealing and leak-proof effect of the connection between the duct and the roof.

[0025] By means of the above-described solution, the present invention has at least the following advantages: More reliable rain protection, completely solving the problem of rainwater infiltration: A continuous drainage system is formed by "water storage tank + sleeve through hole + outer baffle ring water outlet", which can quickly collect and discharge rainwater, preventing rainwater from flowing back into the air duct; at the same time, the rain cover and the leak-proof ring work together to form double protection, blocking rainwater from seeping into the roof and air duct installation gaps from the root. Compared with the traditional bent exhaust duct that only changes the airflow path to prevent rain, it is more comprehensive in rain protection and more airtight, effectively eliminating the risk of indoor water leakage.

[0026] Significantly improved exhaust efficiency with no airflow obstruction: The overall structure is straight, without the horizontal or U-shaped sections of traditional bend-type exhaust ducts that obstruct airflow. This allows exhaust gases inside the building to be discharged naturally and smoothly along the duct body, without the vortex and resistance at bends causing poor exhaust. It also avoids indoor air pressure imbalance in high exhaust volume scenarios, thus meeting the requirements for efficient exhaust.

[0027] Reduced maintenance costs and easier use: The straight exhaust structure reduces dead corners for dust and debris accumulation, eliminating the need for regular disassembly and cleaning of blockages in the bends, unlike bent exhaust pipes; moreover, the stable connections of each component are less prone to aging and loosening, reducing the frequency of maintenance due to structural failures, significantly lowering labor and time costs, and making long-term use more convenient.

[0028] With strong structural stability and superior wind resistance and installation adaptability: The roof anchor points are connected to the support ring and the middle ring of the duct via cables, forming a multi-directional tension fixation from the top and middle, which can effectively offset the impact of external forces such as wind and prevent the duct from swaying, shifting or bending deformation. The structural stability is far superior to that of the bent exhaust duct that relies on multiple connectors. At the same time, the straight exhaust design does not require additional space to accommodate the turning pipe section, has low requirements for roof space, and can be flexibly arranged in scenarios with narrow roofs or other facilities nearby, making it more adaptable.

[0029] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a structural schematic diagram of the adapter of this utility model; Figure 3 This is a schematic diagram of the installation structure of the adapter of this utility model; In the diagram: 1. Duct body; 2. Roof; 3. Connector; 4. Sleeve; 5. Water tank; 6. Support ring; 7. Outer retaining ring; 8. Anchor point; 9. Pull ring; 10. Rain cover; 11. Leak-proof ring. Detailed Implementation

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0033] See Figure 1 The duct body 1, installed on the roof 2, is responsible for exhausting the exhaust gas inside the building. The adapter 3 fixed at its top serves as a connection and support. The adapter 3 supports the sleeve 4, which has a diameter larger than the top of the duct body 1. The top of the duct body 1 extends beyond the bottom of the sleeve 4, forming an annular water storage tank 5 between the duct body 1 and the sleeve 4. When rainwater falls from the top of the sleeve 4, it will first enter the water storage tank 5 for temporary collection, preventing rainwater from directly entering the duct body 1 and affecting the exhaust. At the same time, the water storage tank 5 can provide a buffer for rainwater discharge. With the help of subsequent structures, rainwater can be discharged smoothly. The duct body 1 always keeps the vertical exhaust channel unobstructed throughout the process, ensuring stable exhaust gas discharge. The sleeve 4 supported by the adapter 3 cooperates with the duct body 1 to form a water storage tank 5, which not only solves the problem of rainwater easily entering the traditional straight exhaust duct, but also does not require changing the airflow path like a bent exhaust duct. It allows the exhaust gas to flow naturally along the duct body 1, reducing exhaust resistance. At the same time, the presence of the water storage tank 5 makes rainwater collection more orderly, avoiding disorderly rainwater leakage. Moreover, the components fit together tightly, the overall structure is simple, and it can maintain efficient exhaust while ensuring rainproof effect, and also reduces the maintenance difficulty caused by complex structure.

[0034] See Figure 3Multiple through holes are provided at the bottom of the sleeve 4 where it contacts the adapter 3. When rainwater falls into the water storage tank 5 formed between the duct body 1 and the sleeve 4, these through holes will promptly drain the rainwater collected in the water storage tank 5, preventing excessive accumulation and overflow. This prevents rainwater from flowing back into the duct body 1 and affecting the exhaust function. At the same time, the stable support of the adapter 3 on the sleeve 4 ensures that the through holes always maintain their corresponding positions with the water storage tank 5, allowing the drainage process to continue smoothly without interfering with the normal exhaust operation of the duct body 1 through the roof 2. The holes can directly cooperate with the water storage tank 5 to complete the rainwater drainage without the need for additional complex drainage components. The cooperation between the sleeve 4 and the adapter 3 achieves both rain protection and simplifies the structure. Compared with the traditional method of relying on bending to block rainwater, it does not increase exhaust resistance, maintains the efficient exhaust of the duct body 1, and avoids the aging of components caused by rainwater retention, extending the service life of the overall structure. Moreover, the through hole drainage method is stable and reliable, and can continue to function without frequent maintenance.

[0035] The adapter 3, installed at the top of the duct body 1, needs to stably support the sleeve 4. The outwardly protruding support ring 6 included in the adapter 3 directly contacts the bottom of the sleeve 4. The structural strength of the support ring 6 provides stable support for the sleeve 4, ensuring that the sleeve 4 remains in the corresponding position without displacement or shaking. This maintains the integrity of the annular water storage tank 5 between the sleeve 4 and the duct body 1, ensuring that the water storage tank 5 collects rainwater normally without affecting the ventilation operation of the duct body 1 through the roof 2. As part of the adapter 3, the support ring 6 can precisely adapt to the support requirements of the sleeve 4 without the need for additional complex support structures, simplifying the overall assembly process. Moreover, the protruding structure of the support ring 6 allows for more even distribution of support force, preventing damage to the sleeve 4 due to uneven local stress, extending the service life of the sleeve 4, and ensuring the stability of the sleeve 4's position. This provides a reliable structural foundation for subsequent rainwater collection and drainage, ensuring the stable operation of the direct exhaust duct's rainproof and ventilation functions.

[0036] Referring to point 2, the adapter 3 installed at the top of the duct body 1 needs to stably support the sleeve 4. The outwardly protruding support ring 6 included in the adapter 3 directly contacts the bottom of the sleeve 4. The structural strength of the support ring 6 provides stable support for the sleeve 4, ensuring that the sleeve 4 always remains in the corresponding position without displacement or shaking. This ensures that the sleeve 4 and the duct body 1 always maintain the integrity of the annular water storage tank 5, guaranteeing that the water storage tank 5 can collect rainwater normally, while not affecting the exhaust operation of the duct body 1 through the roof 2. As part of the adapter 3, the support ring 6 can precisely adapt to the support requirements of the sleeve 4 without the need for additional complex support structures, simplifying the overall assembly process. Moreover, the protruding structure of the support ring 6 can make the support force more even, avoiding damage to the sleeve 4 due to uneven local stress, extending the service life of the sleeve 4, and ensuring the stability of the sleeve 4's position. This provides a reliable structural foundation for subsequent rainwater collection and discharge, ensuring the stable operation of the direct exhaust duct's rainproof and exhaust functions.

[0037] Multiple anchor points 8 are evenly fixed around the duct body 1 on the upper surface of the roof 2. The top of the anchor points 8 are fixedly connected to the support ring 6 on the outside of the adapter 3 by a cable. Through this connection method, the anchor points 8 can pull and fix the support ring 6 from multiple directions around the duct body 1, thereby driving the adapter 3 and the sleeve 4 connected to it to maintain a stable position. This prevents the adapter 3 and sleeve 4 at the top of the duct body 1 from shaking or shifting under the impact of external wind or airflow, ensuring normal exhaust of the duct body 1. At the same time, it ensures the structural integrity of the water storage tank 5 between the sleeve 4 and the duct body 1, so as not to affect the rainwater collection and drainage function. Anchor point 8 and support ring 6 are connected by cables, which can provide multi-directional stable tension for the top structure of the duct. Compared with the single fixing method, it has stronger resistance to external forces and effectively improves the overall structural stability. In addition, the anchor point 8 is evenly distributed around the duct body 1, which can make the tension force more balanced and avoid damage to the support ring 6 and the adapter 3 due to excessive local stress. At the same time, this connection method does not occupy too much space in the roof 2, nor does it affect the exhaust channel of the duct body 1, and can maintain efficient exhaust while ensuring structural stability.

[0038] The ring 9, fixed in the middle of the duct body 1, is connected to the top ring of the anchor point 8 on the roof 2 surrounding the duct body 1 via a cable. The ring 9 can evenly transmit the pulling force of the anchor point 8 to the middle of the duct body 1. In conjunction with the pulling force of the anchor point 8 on the outer support ring 6 of the adapter 3, a two-way stable structure is formed from the middle and top of the duct body 1. This prevents the duct body 1 from swaying or bending due to its long length under the influence of external wind or its own weight. It ensures that the duct body 1 always maintains the unobstructed vertical exhaust channel, and at the same time ensures the stability of the water storage tank 5 formed by it and the sleeve 4, so as not to affect the rainwater collection and drainage function. The pull ring 9 allows for more even force distribution in the middle of the duct body 1, preventing damage caused by excessive local stress. Combined with the double-tension fixation formed by the anchor point 8, the structure is more stable than the method of fixing only the top, and can better resist external impacts. Moreover, the pull ring 9 is installed in the middle of the duct body 1 without taking up extra space or obstructing the exhaust of the duct body 1. While enhancing stability, it maintains efficient exhaust effect and reduces maintenance costs for deformation of the duct body 1 after long-term use.

[0039] The ring 9, fixed in the middle of the duct body 1, is connected to the top ring of the anchor point 8 on the roof 2 surrounding the duct body 1 via a cable. The ring 9 can evenly transmit the pulling force of the anchor point 8 to the middle of the duct body 1. In conjunction with the pulling force of the anchor point 8 on the outer support ring 6 of the adapter 3, a two-way stable structure is formed from the middle and top of the duct body 1. This prevents the duct body 1 from swaying or bending due to its long length under the influence of external wind or its own weight. It ensures that the duct body 1 always maintains the unobstructed vertical exhaust channel, and at the same time ensures the stability of the water storage tank 5 formed by it and the sleeve 4, so as not to affect the rainwater collection and drainage function. The pull ring 9 allows for more even force distribution in the middle of the duct body 1, preventing damage caused by excessive local stress. Combined with the double-tension fixation formed by the anchor point 8, the structure is more stable than the method of fixing only the top, and can better resist external impacts. Moreover, the pull ring 9 is installed in the middle of the duct body 1 without taking up extra space or obstructing the exhaust of the duct body 1. While enhancing stability, it maintains efficient exhaust effect and reduces maintenance costs for deformation of the duct body 1 after long-term use.

[0040] When this direct-vent duct is in operation, the upward-protruding leak-proof ring 11 installed at the contact point between the roof 2 and the duct body 1 can prevent rainwater from seeping into the installation gaps at the base of the connection between the duct body 1 and the roof 2. During rainy weather, due to the combined effect of wind force and the exhaust airflow inside the duct body 1, rainwater will move at an angle, and some rainwater will splash inside the duct body 1, then slide down the inner wall of the duct body 1, and finally flow into the water storage tank 5 between the duct body 1 and the sleeve 4 for collection, preventing rainwater from being trapped in the wind. The rain cover 10, which is fixed to the duct body 1 near the roof 2, has its lower edge located outside the leak-proof ring 11. This can intercept rainwater flowing along the outer wall of the duct body 1 or splashing from the perimeter of the roof 2, preventing rainwater from directly contacting the leak-proof ring 11 and the installation gaps. The leak-proof ring 11 and the rain cover 10 work together to form double protection, ensuring that rainwater will not seep into the room from the installation position of the roof 2 and the duct body 1, while not affecting the normal discharge of exhaust gas from the building by the duct body 1. The advantages of this design are: the leak-proof ring 11 and the rain cover 10 provide double protection through "root blocking + outer interception", and together with the water storage tank 5, they effectively collect the sloping rainwater. Compared with a single rainproof structure, the leak-proof effect is more reliable. It can completely solve the problem of rainwater seepage at the connection between the roof 2 and the duct body 1 and inside the duct body 1. Moreover, the installation positions of each component are reasonable and do not occupy the ventilation space in the middle and top of the duct body 1. While ensuring rainproof sealing, it maintains the simplicity of the overall structure and the high efficiency of ventilation. It can stably play the role of leak prevention without frequent maintenance during long-term use.

[0041] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A direct-exhaust duct, comprising a roof (2) for mounting the duct body (1), characterized in that: The top of the duct body (1) is fixed with an adapter (3). The adapter (3) is supported by a sleeve (4) with a diameter larger than that of the top of the duct body (1). The top of the duct body (1) extends beyond the lower end of the sleeve (4), so that an annular water storage tank (5) is formed between the duct body (1) and the sleeve (4).

2. The direct exhaust duct according to claim 1, characterized in that: The bottom of the sleeve (4) that contacts the adapter (3) has multiple through holes for draining rainwater from the water storage tank (5).

3. A direct exhaust duct according to claim 2, characterized in that: The adapter (3) includes an outwardly protruding support ring (6) for supporting the sleeve (4).

4. A direct exhaust duct according to claim 2 or 3, characterized in that: The support ring (6) has a vertically arranged annular outer retaining ring (7), which contacts the lower outer wall of the sleeve (4). The outer retaining ring (7) has a water outlet hole that matches the bottom through hole of the sleeve (4).

5. A direct exhaust duct according to claim 4, characterized in that: Multiple anchor points (8) are evenly fixed around the duct body (1) on the upper surface of the roof (2). The hanging ring at the top of the anchor point (8) is fixedly connected to the support ring (6) on the outside of the adapter (3) by a cable.

6. A direct exhaust duct according to claim 5, characterized in that: A full circle of pull rings (9) is fixed in the middle of the duct body (1), and the pull rings (9) are fixedly connected to the hanging rings at the top of the anchor point (8) by a cable.

7. A direct exhaust duct according to claim 6, characterized in that: The duct body (1) is fixed with a ring-shaped rain cover (10) near the roof (2).

8. A direct exhaust duct according to claim 7, characterized in that: A leak-proof ring (11) with an upward protrusion is installed at the position where the roof (2) contacts the air duct body (1). The lower edge of the rain cover (10) is located outside the leak-proof ring (11) to prevent rainwater from seeping into the room from the installation position of the roof (2) and the air duct body (1).

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