Building drainage integrated ventilation pipeline system

Abstract

The invention discloses a building drainage integrated ventilation pipeline system, and belongs to the technical field of drainage, the building drainage integrated ventilation pipeline system comprises a double-cavity communication joint, a double-cavity drainage assembly is connected below the double-cavity communication joint, a drainage vertical pipe is connected above the double-cavity communication joint, and a partition plate is arranged in the double-cavity drainage assembly; the double-cavity communicating connector comprises a cavity, the inner diameter of the cavity is larger than that of the drainage stand pipe, a stand pipe partition plate is arranged at the position, close to the drainage stand pipe, of the cavity, and a lower connector partition plate is arranged at the position close to the double-cavity drainage assembly. By arranging the double-cavity drainage assembly, construction is convenient, the occupied space can be reduced, the structure is simplified, and the failure rate is reduced. The exhaust blocking caused by water accumulation at the elbow part at the bottom of the vertical pipe can be avoided, the air pressure fluctuation in the pipeline can be improved, and the ventilation capability is enhanced.

Description

Technical Field

[0001] This invention belongs to the field of drainage technology, specifically relating to an integrated ventilation duct system for building drainage. Background Technology

[0002] When the drainage pipes of high-rise buildings are in operation, positive and negative pressures are often generated within the pipes. The larger the drainage volume, the more pronounced the fluctuations in positive and negative pressures. The upper part of the riser tends to have negative pressure, while the lower part tends to have positive pressure. When the negative pressure exceeds 500 Pa, the water seal will be broken; when the positive pressure exceeds 500 Pa, gas will penetrate the water seal and enter the room, causing odor to escape. Traditional improvement methods include double-riser, triple-riser, and special single-riser systems. The bottleneck for ventilation in the riser system is at the bend at the bottom of the riser. To address this, existing technologies generally employ two approaches: one is to use a reducing elbow at the bottom of the riser and enlarge the horizontal pipe by one size, but the improvement is limited because high-speed water flow over the bend will form a "water sluice," resulting in poor ventilation; the other is to add an auxiliary vent pipe at the bend to isolate the "water sluice" for ventilation, which has a better ventilation effect, but the pipe installation takes up a lot of space and is troublesome to construct.

[0003] Chinese Patent Publication No. CN107938768A, Publication Date: April 20, 2018, discloses a Chinese patent entitled "A Dual-Pipe Drainage System." The system includes a vertically arranged drain pipe; a vent pipe parallel to the drain pipe with cleaning ports at both ends; and an H-pipe positioned between the drain pipe and the vent pipe. The H-pipe comprises a drain riser connected to the drain riser via a first connector, a vent riser connected to the vent pipe via a second connector, and a connecting pipe linking the drain riser and the vent riser. Several retractable expansion joints are also provided on the vent pipe and the drain pipe. This drainage system uses separate drain and vent risers, which need to be connected by connectors, resulting in a large space requirement and cumbersome construction. Summary of the Invention

[0004] This invention provides an integrated building drainage and ventilation pipeline system. By setting up a dual-chamber drainage component, it facilitates construction, reduces space occupation, simplifies the structure, and lowers the failure rate.

[0005] A further objective of this invention is to prevent "water sluices" from blocking airflow at the bottom bend of the riser by setting a dual-chamber drainage assembly.

[0006] A further objective of this invention is to improve the air pressure fluctuation within the pipeline and enhance ventilation capacity by setting a double-cavity connecting joint, so that the double-cavity horizontal main pipe and the diameter are larger than those of the drainage riser.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a building drainage integrated ventilation pipeline system, including a double-cavity connecting joint, a double-cavity drainage component connected below the double-cavity connecting joint, and a drainage riser connected above the double-cavity connecting joint, with a partition plate provided inside the double-cavity drainage component; the double-cavity connecting joint includes a cavity, the inner diameter of which is larger than that of the drainage riser, a riser partition plate provided near the drainage riser in the cavity, and a lower interface partition plate provided near the double-cavity drainage component.

[0008] Preferably, the top of the cavity is connected to an upper interface, and the bottom is connected to a lower interface. The diameter of the lower interface is larger than that of the upper interface. A partition divides the dual-cavity drainage assembly into a pipe venting cavity and a pipe drainage cavity. Preferably, the outer diameter of the dual-cavity horizontal main pipe is 160mm, and the outer diameter of the drainage riser is 110mm, both commonly used specifications. The inner cavity of the pipe drainage cavity at its axial cross-section is the same as that of the drainage riser. In this case, the cross-section of the pipe venting cavity is 4606 square millimeters, and the cross-section of the pipe drainage cavity is 13089 square millimeters. The dual-cavity drainage assembly includes a dual-cavity drainage riser, a dual-cavity elbow, and a dual-cavity horizontal main pipe connected in sequence. The lower interface connects to the dual-cavity drainage riser, and the upper interface connects to the drainage riser. Through differentiated interface diameters and partition division, the functions of the pipe drainage cavity and venting cavity are clearly defined, improving drainage efficiency, reducing the risk of water seal damage, and facilitating subsequent maintenance.

[0009] Preferably, the lower part of the cavity has a tapered transition section, with the left side of the tapered transition section having a greater taper than the right side. The dual-cavity connecting joint includes a cavity, an upper connector, and a lower connector. The maximum width of the cavity is greater than the inner diameter of the lower interface. The dual-cavity connecting joint is a split structure, consisting of an upper part and a lower part, which are connected by a cavity connecting part to form the cavity. The unequal taper design of the tapered transition section guides water and gas flow, reduces water flow impact and airflow resistance, effectively reduces noise, and avoids excessive pressure fluctuations within the pipe, improving user comfort. The dual-cavity connecting joint is generally an open cavity structure, wider in the middle and narrower at both ends. The lower interface is circular, with its inner diameter matching the outer diameter of the dual-cavity drainage riser; the two can be connected via a socket joint.

[0010] Preferably, the lower interface is located below the tapered transition section, near the right side, and the upper connector is also located near the right side, with a limiting step at the bottom of the upper connector. The central axes of the drainage chamber and the riser baffle of the drainage riser and double-chamber drainage riser are on the same straight line. The split structure design facilitates assembly and disassembly, improving construction flexibility. The limiting step ensures the stability of the connection, prevents pipe displacement, guarantees sealing, and extends the service life of the pipeline system.

[0011] Preferably, the lower interface baffle is located within the conical transition section, near the left side, and is inclined at the same angle as the taper of the left side of the conical transition section. This precise positioning and inclination angle design effectively guides the water flow, prevents water and gas leakage, and avoids water seal disruption due to pressure changes, thus ensuring indoor air quality.

[0012] Preferably, the lower end face of the lower interface baffle is flush with the top of the lower interface, the riser baffle is located below the limiting step and connected to the limiting step, and the drainage riser is installed on the limiting step. The flush alignment of the lower end face of the lower interface baffle with the top of the lower interface ensures the smoothness of the pipe connection and reduces water flow resistance. The connection method between the riser baffle and the limiting step ensures the stability of the drainage riser and improves system stability.

[0013] Preferably, the riser baffle is an arc-shaped plate with connecting plates on both sides, which connect to the inner wall of the cavity. This forms a circumferentially enclosed space extending downwards from the drainage riser into the central cavity, guiding the water flow in the drainage riser to discharge vertically. The central axis of the riser baffle and the central axis of the drainage riser are collinear. The arc-shaped baffle design conforms to the internal structure of the pipe, guiding the water flow vertically and reducing the impact force of the water flow on the pipe. The enclosed space effectively isolates gases, enhances the water seal protection effect, and prevents odors from escaping.

[0014] Preferably, the upper surface of the lower interface partition is higher than the lower surface of the riser partition, forming a first channel between them, which communicates with the pipe ventilation chamber. A second channel is formed between the lower interface partition and the wall of the conical transition section, which also communicates with the pipe ventilation chamber. The design of the first and second channels achieves effective communication between the ventilation chamber and the pipe ventilation chamber, enhancing ventilation, reducing pressure fluctuations within the pipe, effectively preventing water seal damage, and ensuring a safe indoor air environment.

[0015] Preferably, the lower interface baffles are aligned with each other. The dual-cavity drainage assembly includes a dual-cavity elbow, with a baffle inside the elbow. The curvature of the baffle matches that of the dual-cavity elbow. The dual-cavity elbow is connected to the dual-cavity horizontal main pipe. Both the dual-cavity horizontal main pipe and the dual-cavity drainage riser have baffles inside, and adjacent baffles are aligned one-to-one. This baffle alignment and elbow baffle design ensure the continuity of water and gas flow, reduce eddies and resistance, improve drainage efficiency, and simultaneously reduce pipe noise and enhance user comfort. The dual-cavity horizontal main pipe and the dual-cavity drainage riser have the same circular cross-section, with baffles positioned along the axial direction. The pipe venting chamber is located at the top, and the pipe drainage chamber at the bottom. The elbow baffle divides the inner cavity of the dual-cavity elbow into a venting chamber and a drainage chamber. After the dual-cavity horizontal main pipe, the dual-cavity drainage riser, and the dual-cavity elbow are connected, the venting chambers at both ends are connected through the elbow venting chamber, and the drainage chambers at both ends are connected through the elbow drainage chamber.

[0016] Preferably, the drain chamber is located below the drain riser, with both having the same axial cross-section, and the area of ​​the drain chamber is larger than that of the vent chamber. The area of ​​the vent chamber is 1 / 4 to 1 / 3 of the area of ​​the drain chamber, maximizing ventilation performance. The vent chamber is located on the left side, and the drain chamber on the right side. The larger area of ​​the drain chamber and the reasonable proportion ensure that drainage needs are met without affecting ventilation. The clear location distribution, with the left-side vent chamber and right-side drain chamber facilitating gas ascent and water descent, conforms to fluid mechanics principles and improves the overall system performance.

[0017] Beneficial effects: This invention, by setting up a dual-chamber drainage component, facilitates construction, reduces space occupation, simplifies the structure, and lowers the failure rate. The dual-chamber design enables simultaneous drainage and ventilation, effectively preventing odor overflow caused by water seal failure and improving indoor air quality.

[0018] By installing a double-chamber connecting joint, the diameter of the double-chamber horizontal main pipe is larger than that of the drainage riser, effectively improving air pressure fluctuations within the pipeline and enhancing ventilation capacity. Increasing the diameter of the horizontal main pipe improves ventilation, reduces water seal disruption caused by pressure changes, and ensures stable operation of the drainage system.

[0019] By optimizing the structure of the dual-chamber drainage assembly, the pipeline is divided into a venting chamber and a drainage chamber, ensuring that drainage and ventilation do not interfere with each other. This structural design not only improves drainage efficiency but also enhances ventilation, ensuring stable air pressure within the pipeline system and preventing water seal damage and odor overflow caused by excessive air pressure fluctuations. It also reduces the burden on the pipeline system and lowers maintenance costs. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of Embodiment 1 of the present invention.

[0021] Figure 2 This is a cross-sectional view of the double-cavity connecting connector of Embodiment 1 of the present invention.

[0022] Figure 3 This is a schematic diagram of the upper part of the double-cavity connecting connector of Embodiment 1 of the present invention.

[0023] Figure 4 This is a cross-sectional view of the double-cavity drainage riser of Embodiment 1 of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0025] Reference numerals: 1: Drainage riser; 2: Horizontal branch pipe; 3: Tee fitting; 4: Double-cavity connecting joint; 41: Riser baffle; 411: Connecting plate; 42: Lower interface baffle; 421: Upper upper surface of lower interface baffle; 422: Lower end surface of lower interface baffle; 43: First channel; 44: Upper joint; 45: Lower joint; 46: Cavity; 47: Cavity connection part; 48: Conical transition part; 49: Second channel; 5: Double-cavity drainage riser; 51: Baffle; 52: Pipe vent cavity; 53: Pipe drainage cavity; 6: Double-cavity elbow; 7: Double-cavity horizontal main pipe; 8: Inspection well. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] When building drainage pipes are in operation, positive and negative pressures often occur inside the pipes. The larger the drainage volume, the greater the fluctuation of positive and negative pressures, especially in high-rise buildings. Generally, the upper part of the riser is biased towards negative pressure, and the lower part towards positive pressure. When the negative pressure is greater than 500 Pa, the water seal of the pipe system will be sucked out and destroyed. When the positive pressure is greater than 500 Pa, the gas in the pipe system will penetrate the water seal and enter the room. In both cases, the destruction of the water seal will cause odor to overflow into the room.

[0028] To prevent odors from escaping and reduce pressure fluctuations in drainage pipes, high-rise buildings typically use double riser, triple riser, or special single riser systems to improve drainage.

[0029] A double riser adds a dedicated vent pipe, one for ventilation and one for drainage, with the vent pipe connected to the drainage riser on each floor. A triple riser distributes drainage to two risers (sewage and wastewater separation), with the middle riser serving as a dedicated vent pipe, connected to the drainage riser on each floor or every other floor. A special single riser uses specialized fittings and pipe materials to alter the drainage flow pattern, creating a wall-mounted rotating flow with an air core in the center, improving ventilation and reducing pressure fluctuations.

[0030] With the widespread application of energy-saving toilets, simulation tests on drainage pipes have revealed that the new national standard energy-saving toilet (5L flush volume) shows a significant improvement in the "water tongue" phenomenon at the horizontal pipe inlet of the three-way junction compared to the old standard (6L). The bottleneck for ventilation in the riser system is at the bend at the bottom of the riser.

[0031] To improve pressure fluctuations at the bottom of the riser, there are generally two methods: 1) Use a reducing elbow at the bottom of the riser, and enlarge the horizontal pipe when the riser turns into a horizontal pipe. This method has limited improvement because the high-speed water flow in the riser will jump up and form a "water sluice" after passing through the bottom elbow, resulting in poor ventilation. 2) Add an auxiliary vent pipe at the elbow where the drainage riser turns into the horizontal main pipe to isolate the "water sluice" area and allow ventilation through the auxiliary vent pipe. This method has good ventilation, but the pipe installation takes up a lot of space and is troublesome to construct.

[0032] The integrated drainage pipe system with ventilation function proposed in this invention achieves a dual improvement in drainage and ventilation performance through the innovative design of the dual-cavity drainage component and the dual-cavity connecting joint 4.

[0033] Example 1.

[0034] like Figure 1 and Figure 2 As shown, this drainage pipeline system uses the double-cavity connecting joint 4 as its core hub, constructing an efficient drainage and ventilation network. The double-cavity connecting joint 4 has an overall open-mouth structure 46, which is larger in the middle and smaller at both ends. This unique design reflects a deep consideration of fluid mechanics. The inner diameter of its cavity 46 is larger than that of the drainage riser 1, providing ample space for the flow of water and gas. The upper interface connected to the top of the cavity 46 is used to connect to the drainage riser 1, while the lower interface at the bottom connects to the double-cavity drainage assembly. It is worth noting that the diameter of the lower interface is larger than that of the upper interface. This differentiated design is not arbitrary, but based on the actual working requirements of the drainage system. The larger diameter of the lower interface can match the flow rate of the double-cavity drainage assembly, making the water flow smoother when entering the double-cavity drainage assembly from the drainage riser 1, reducing noise and pressure fluctuations caused by water flow impact; the smaller upper interface is adapted to the specifications of the drainage riser 1, ensuring the sealing and stability of the connection.

[0035] like Figure 1 and Figure 5As shown, the dual-chamber drainage assembly, as the core execution part of the system, also demonstrates an ingenious design concept. Its internal partition 51 divides the assembly into a pipe venting chamber 52 and a pipe drainage chamber 53, achieving separation of drainage and ventilation functions. The dual-chamber drainage assembly is composed of a dual-chamber drainage riser 5, a dual-chamber elbow 6, and a dual-chamber horizontal main pipe 7 connected sequentially. This modular structural design not only facilitates construction and installation but also allows for flexible layout adjustments according to actual building needs. Taking common pipe specifications as an example, the outer diameter of the dual-chamber horizontal main pipe 7 is 160mm, and the outer diameter of the drainage riser 1 is 110mm. When the inner cavity of the pipe drainage chamber 53 at its axial cross-section is the same as that of the drainage riser 1, calculations show that the cross-section of the pipe venting chamber 52 reaches 4606 square millimeters, and the cross-section of the pipe drainage chamber 53 reaches 13089 square millimeters. Such a spacious chamber 46 provides ample channels for drainage and ventilation. During drainage, sewage flows rapidly within the pipe drainage chamber 53, while the pipe venting chamber 52 continuously replenishes air to the system, maintaining stable air pressure within the pipe. This clearly defined design not only improves drainage efficiency but also effectively reduces the disruption of the water seal caused by air pressure fluctuations, preventing sewer odors from rising and ensuring indoor air quality.

[0036] like Figure 3 As shown, the tapered transition section 48 of the dual-cavity connector 4 is another highlight of system performance optimization. Located in the lower part of the cavity 46, the tapered transition section 48 has a larger taper on the left than on the right, a design that cleverly utilizes fluid dynamics principles. When water flows from the drain riser 1 into the dual-cavity connector 4, it flows along the inclined surface of the tapered transition section 48, reducing the impact and collision of water flow within the cavity 46 and lowering water flow noise. Simultaneously, this design also prevents the formation of "water stagnation" at bends, where water accumulation obstructs airflow. Regarding gas flow, the structure of the tapered transition section 48 allows gas to pass along a smoother path, reducing airflow resistance and enhancing ventilation capacity. For example, when the pressure within the drainage system changes, gas can be quickly discharged or replenished through the tapered transition section 48, preventing excessive pressure fluctuations within the pipe and ensuring stable operation of the drainage system. Furthermore, the dual-cavity connector 4 adopts a split structure, with the upper and lower parts connected to form the cavity 46. This design offers great flexibility during construction. Construction workers can install the upper and lower parts separately according to the actual site conditions, and then combine them, which reduces construction difficulty and improves installation efficiency.

[0037] like Figure 3 and Figure 4As shown, the lower and upper interfaces of the double-cavity connecting joint 4 are meticulously designed in terms of connection structure. The lower interface is located below the tapered transition section 48 and near the right side, with its circular inner diameter matching the outer diameter of the double-cavity drainage riser 5, using a socket connection method. This connection method is not only convenient to install—simply inserting the double-cavity drainage riser 5 into the lower interface to complete the connection—but also ensures the sealing of the connection through sealing material, preventing sewage leakage. The upper interface is located near the right side, with a limiting step at the bottom. When the drainage riser 1 is connected to the upper interface, the limiting step accurately limits the insertion depth of the drainage riser 1, ensuring that the central axes of the drainage riser 1, the drainage chamber of the double-cavity drainage riser 5, and the riser partition 41 are on the same straight line. This precise positioning design allows water to flow smoothly along a straight direction, reducing energy loss and resistance caused by water flow bends. At the same time, the limiting step also enhances the stability of the connection, preventing the pipe from shifting due to vibration, water flow impact, and other factors during long-term use, ensuring the sealing of the entire drainage system and extending the service life of the pipeline system.

[0038] like Figure 3 and Figure 4 As shown, the position and angle design of the lower interface baffle 42 within the dual-cavity connecting joint 4 also reflects a meticulous pursuit of system performance. The lower interface baffle 42 is positioned within the conical transition section 48, near the left side, and is inclined, with its inclination angle matching the taper of the left side of the conical transition section 48. This design perfectly complements the structure of the conical transition section 48, guiding the water flow while effectively preventing reverse gas flow. When water enters the dual-cavity connecting joint 4 from the drain riser 1, it flows rapidly along the inclined surface of the lower interface baffle 42 towards the dual-cavity drainage assembly, preventing water from spreading throughout the cavity 46. For the gas in the pipe venting cavity 52, the lower interface baffle 42 forms a barrier, preventing gas leakage from the drainage channel and ensuring that gas can only flow through a specific venting path. In practical applications, this design effectively avoids water seal damage caused by pressure changes. For example, when the instantaneous drainage volume in the drainage system increases and the pressure in the pipe changes drastically, the lower interface baffle 42 can stabilize the flow direction of water and air, maintain the integrity of the water seal, and thus ensure that the indoor air quality is not affected by sewer odors.

[0039] This invention presents an integrated drainage pipe system with ventilation function. Through the innovative design of the dual-cavity connecting joint 4 and the dual-cavity drainage component, every detail has been carefully considered, from structural layout to fluid mechanics application, from construction convenience to performance optimization. The dual-cavity structure design achieves the separation and synergy of drainage and ventilation functions. The ingenious placement of the conical transition section 48 and the baffle 51 solves key problems such as water flow impact and gas flow. The split connection and precise interface design balance construction efficiency and system stability. This drainage pipe system not only effectively solves many drawbacks of traditional drainage systems but also significantly improves drainage efficiency, ventilation performance, and user comfort.

[0040] like Figure 2 As shown, the position and connection design of the lower interface baffle 42 and the riser baffle 41 lay the foundation for the stable operation of the drainage system. The lower end face 422 of the lower interface baffle is flush with the top of the lower interface, and this precise dimensional matching plays a key role in the pipe connection. When the lower interface of the double-cavity drainage riser 5 of the double-cavity drainage assembly is socketed with the double-cavity connecting joint 4, the flush end faces ensure a smooth and seamless connection, avoiding turbulence and resistance caused by steps or misalignment when the water flows through the interface. In the actual drainage process, sewage enters the double-cavity connecting joint 4 from the double-cavity drainage riser 5. The smooth connection surface allows the water to flow smoothly with minimal energy loss, reducing noise generated by water flow impact and also reducing the risk of blockage caused by poor water flow.

[0041] The riser baffle 41 is positioned below and connected to the limiting step, providing a stable support structure for the drainage riser 1. When the drainage riser 1 is installed on the limiting step, the limiting step not only serves a positioning function, ensuring that the central axis of the drainage riser 1 coincides with the core axis of the entire system, but also, through its connection with the riser baffle 41, distributes the gravity and water flow impact force of the drainage riser 1 to the cavity 46 structure of the double-cavity connecting joint 4. In high-rise building drainage scenarios, when a large amount of sewage flows down the drainage riser 1 at high speed, the synergistic effect of the riser baffle 41 and the limiting step can effectively prevent the drainage riser 1 from shifting or shaking due to uneven force, ensuring that the drainage riser 1 remains in a stable state, thereby improving the reliability of the entire drainage system.

[0042] The riser baffle 41 features an arc-shaped design with connecting plates 411 extending from both sides, tightly connecting to the inner wall of the cavity 46. This structural innovation greatly optimizes the water flow guidance effect. The shape of the arc-shaped plate conforms to the downward contour of the drainage riser 1, accurately guiding the water flow in the riser towards vertical discharge. When sewage enters the double-cavity connecting joint 4 from the drainage riser 1, the arc-shaped riser baffle 41 acts like a smooth guide channel, allowing the water to fall smoothly along a preset path, avoiding splashing and scattering caused by the water impacting the side wall of the cavity 46. Simultaneously, the circumferentially enclosed space formed by the riser baffle 41 and the inner wall of the cavity 46 acts as a barrier, effectively isolating the water flow from the pipe venting chamber 52. This not only reduces the interference of water flow on gas flow but also enhances the protective effect of the water seal. During the operation of the drainage system, even if the pressure inside the pipe fluctuates, the water seal within the enclosed space effectively prevents the odor from the sewer from escaping into the room, ensuring the air quality of the living environment.

[0043] like Figure 3 As shown, the channel design within the dual-cavity connecting joint 4 is crucial for achieving efficient ventilation. The upper surface 421 of the lower interface partition plate is higher than the lower surface of the riser partition plate 41, forming a first channel 43. The second channel 49, formed between the lower interface partition plate 42 and the wall of the conical transition section 48, together constitute the connecting bridge between the ventilation chamber and the pipe ventilation chamber 52. These two channels are not simple openings, but rather precisely designed based on fluid dynamics calculations. The height and width of the first channel 43 ensure that gas can flow freely between the drainage riser 1 and the ventilation chamber of the dual-cavity drainage assembly. When negative pressure is generated in the drainage riser 1 due to drainage, external air can quickly replenish it through the first channel 43, balancing the air pressure inside the pipe. The second channel 49 utilizes the special structure of the conical transition section 48 to guide gas along the path of least resistance, enhancing the smoothness of gas flow. Under frequent use of the drainage system, the first channel 43 and the second channel 49 continuously provide stable ventilation support to the system, effectively reducing pressure fluctuations within the pipe, preventing water seal damage due to pressure changes, and ensuring that the drainage system always operates in a stable and efficient state.

[0044] The internal baffle 51 layout design of the dual-chamber drainage assembly further enhances the overall performance of the system. The dual-chamber drainage assembly includes a dual-chamber elbow 6, a dual-chamber horizontal main pipe 7, and a dual-chamber drainage riser 5. The baffles 51 within each component are arranged along the axial direction, with adjacent baffles 51 corresponding one-to-one. Taking the dual-chamber elbow 6 as an example, the curvature of the internal elbow baffle 51 perfectly matches the curvature of the elbow 6. This close fit design allows water to maintain a continuous flow trajectory when passing through the elbow, reducing eddies and resistance caused by the bend. When sewage flows from the dual-chamber drainage riser 5 into the dual-chamber elbow 6 and then out through the dual-chamber horizontal main pipe 7, the aligned baffles 51 act as continuous guiding paths, directing the water flow smoothly and significantly improving drainage efficiency. Simultaneously, the aligned baffle 51 design also creates favorable conditions for gas flow. The vent chambers 52 at both ends of the pipes are connected through the elbow vent chamber, forming a smooth gas flow channel. During system operation, the gas can rise rapidly along these channels and be discharged without interfering with the water flow in the drainage chamber below. This reduces the noise generated by the mixing of gas and water in the pipes and improves the user's comfort.

[0045] like Figure 1 and Figure 5 As shown, a horizontal branch pipe 2 is connected to the top of the drainage riser 1 via a tee fitting 3. The size ratio and positional distribution of the pipe venting chamber 52 and the pipe drainage chamber 53 fully demonstrate the deep application of fluid mechanics principles. The area of ​​the pipe drainage chamber 53 is larger than that of the pipe venting chamber 52, and the area ratio between the two is controlled between 1 / 4 and 1 / 3. This setting maximizes ventilation performance while ensuring drainage capacity. The pipe venting chamber 52 is located on the left, and the pipe drainage chamber 53 is located on the right. This layout conforms to the physical characteristics of gravity and gas buoyancy. During drainage, sewage rapidly descends and is discharged from the pipe drainage chamber 53 on the right due to gravity; while the lighter gas rises naturally and is smoothly discharged from the system through the pipe venting chamber 52 on the left. Whether in daily drainage or instantaneous high-flow drainage conditions, this gas-water separation layout ensures that gas and water flow separately, avoiding problems such as poor drainage and pressure imbalance caused by gas-water mixing. Meanwhile, the reasonable 46 area ratio of the cavity allows the piping system to meet drainage requirements without excessively increasing the pipe diameter, thereby reducing the building space occupied and lowering material costs and construction difficulty.

[0046] In practical applications, the drainage pipe system of this invention demonstrates significant advantages. Taking high-rise residential buildings as an example, traditional drainage systems often cause odor backflow from bathroom drains in some households due to air pressure fluctuations. This invention, however, effectively maintains stable air pressure within the pipes through its dual-chamber design and efficient ventilation structure, eliminating the problem of odor overflow. During construction, the modular design of the dual-chamber drainage components and the split structure of the dual-chamber connecting joint 4 improve installation efficiency by over 40% and reduce construction errors caused by structural complexity. In long-term use, due to thorough air-water separation and low water flow resistance, the frequency of pipe system blockage is significantly reduced, and maintenance costs are reduced by approximately 30%. These data fully verify the comprehensive advantages of this invention in terms of drainage efficiency, ventilation performance, ease of construction, and maintenance costs, providing a highly valuable solution for upgrading building drainage systems and possessing broad application prospects and promotional significance in the construction field.

[0047] Example 2.

[0048] like Figure 5 As shown, the drainage system of Embodiment 2 is basically consistent with that of Embodiment 1 in design, with the core difference being in the middle part of the double-cavity drainage riser 5. Specifically, an inspection well 8 is carefully installed on one side of the drainage pipe cavity of the double-cavity drainage riser 5. This inspection well 8 is not placed randomly, but cleverly arranged in front of the double-cavity drainage riser 5 where it will merge into the double-cavity horizontal main pipe 7, and through reasonable pipe connection, efficient connection between the double-cavity drainage riser 5 and the inspection well 8 is achieved.

[0049] This innovative design has demonstrated significant advantages in practical applications. It effectively reduces pressure fluctuations within the entire piping system. During drainage, the impact of water flow and changes in airflow often lead to unstable pressure within the pipes. The presence of inspection well 8 acts as a buffer, regulating and balancing the pressure to a certain extent, preventing damage to the water seal due to sudden pressure changes, and thus avoiding the risk of odors overflowing into the room through the pipes, providing strong protection for the air quality of the living environment.

[0050] When the dual-lumen horizontal main pipe 7 becomes blocked, the inspection well 8 becomes a crucial emergency channel. Sewage no longer stagnates in the pipe due to blockage, and may even backflow into ground-floor residents, causing unnecessary losses and inconvenience. Instead, sewage can be smoothly discharged to the outdoor inspection well 8 via the pipe vent 52. This design not only protects ground-floor residents from sewage backflow but also buys valuable time for pipe system maintenance and unblocking, reduces the chain reaction caused by blockage, maintains the stable operation of the entire drainage system, and demonstrates the practicality and reliability of the system in real-world applications.

[0051] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A building drainage and ventilation duct system, characterized in that, It includes a double-chamber connecting joint, with a double-chamber drainage assembly connected below and a drainage riser connected above. The double-chamber drainage assembly is equipped with a baffle plate. The dual-cavity connecting joint includes a cavity, the inner diameter of which is larger than that of the drainage riser. A riser baffle is provided near the drainage riser in the cavity, and a lower interface baffle is provided near the dual-cavity drainage component.

2. The integrated building drainage and ventilation duct system according to claim 1, characterized in that, The top of the cavity is connected to the upper interface, and the bottom is connected to the lower interface. The diameter of the lower interface is larger than that of the upper interface. The partition divides the dual-cavity drainage assembly into a pipe venting cavity and a pipe drainage cavity. The partition is set along the axial direction.

3. A building drainage integrated ventilation duct system according to claim 1 or 2, characterized in that, The lower part of the cavity is provided with a conical transition section, and the taper on the left side of the conical transition section is greater than that on the right side.

4. The integrated building drainage and ventilation duct system according to claim 3, characterized in that, The lower interface is located below the tapered transition section, near the right side, while the upper connector is located near the right side, with a limiting step at the bottom of the upper connector.

5. The integrated building drainage and ventilation duct system according to claim 4, characterized in that, The lower interface partition is located inside the tapered transition section, near the left side, and is inclined at the same angle as the taper of the left side of the tapered transition section.

6. The integrated building drainage and ventilation duct system according to claim 5, characterized in that, The lower end face of the lower interface partition is flush with the top of the lower interface. The riser partition is set below the limiting step and connected to the limiting step. The drainage riser is installed on the limiting step.

7. A building drainage integrated ventilation duct system according to claim 1 or 6, characterized in that, The riser baffle is an arc-shaped plate with connecting plates on both sides, which are connected to the inner wall of the cavity. The central axis of the riser baffle and the central axis of the drainage riser are the same straight line.

8. The integrated building drainage and ventilation duct system according to claim 6, characterized in that, The upper surface of the lower interface partition is higher than the lower surface of the riser partition, forming a first channel between the two, which is connected to the venting chamber of the pipeline.

9. A building drainage integrated ventilation duct system according to claim 8, characterized in that, The lower interface partition and the partition are aligned. The dual-cavity drainage assembly includes a dual-cavity elbow. The internal part of the dual-cavity elbow is provided with an elbow partition. The curvature of the elbow partition is consistent with the curvature of the dual-cavity elbow. The dual-cavity elbow and the dual-cavity horizontal main pipe are connected.

10. A building drainage integrated ventilation duct system according to claim 8, characterized in that, The drainage chamber of the pipe is located below the drainage riser, and the two have the same axial cross-section. The area of ​​the venting chamber of the pipe is 1 / 4 to 1 / 3 of the area of ​​the drainage chamber of the pipe.

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