Drainage system vent structure

Abstract

The utility model relates to a drainage system ventilation structure, including drain pipe, the drain pipe has the communication pipe on the intercommunication, the communication pipe has the exhaust pipe on the intercommunication, be equipped with the windproof backflow prevention part between the exhaust pipe and communication pipe, the windproof backflow prevention part includes the fairlead of outside exhaust pipe, be equipped with a plurality of arc fairing between the fairlead and exhaust pipe, a plurality of the arc fairing helical arrangement constitutes along the central axis of exhaust pipe, the top of exhaust pipe has the fairing cone that is streamline, the top of fairing cone is equipped with the mesh enclosure, the utility model discloses can form the helical flow channel through the fairlead and helical arrangement's arc fairing, the kinetic energy of outside airflow is converted into rotary kinetic energy, the impact of positive wind pressure to exhaust pipe is reduced significantly, effectively prevent the wind backflow, improve the stability of drainage system under the strong wind environment.

Description

Technical Field

[0001] This utility model relates to the field of building water supply and drainage engineering technology, and in particular to the ventilation structure of drainage system. Background Technology

[0002] In the field of building water supply and drainage, the ventilation structure of the drainage system is a core component ensuring the normal operation of the pipeline, and its function directly affects drainage efficiency, environmental hygiene, and system stability. Existing technologies generally suffer from the following significant defects in the ventilation structures of traditional drainage systems:

[0003] Traditional ventilation structures often employ simple straight pipes or bends, lacking effective guidance and buffering of external airflow. During strong winds, airflow can easily backflow into the drainage pipes, disrupting the pressure balance within the pipes. For example, in high-rise buildings, outdoor wind speeds increase significantly with height; strong winds can cause negative pressure within the pipes, damaging water seals in sanitary fixtures and leading to sewage backflow with foul odors or even water backflow. Furthermore, the backflowing airflow clashes with rising exhaust gas within the drainage pipes, significantly increasing ventilation resistance, reducing the drainage system's exhaust efficiency, and in severe cases, causing sewage stagnation, bacterial growth, and blockage risks. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a ventilation structure for a drainage system. The specific technical solution is as follows:

[0005] A drainage system ventilation structure includes a drain pipe, a connecting pipe connected to the drain pipe, an exhaust pipe connected to the connecting pipe, a windproof backflow prevention section between the exhaust pipe and the connecting pipe, the windproof backflow prevention section including a guide sleeve located outside the exhaust pipe, a plurality of arc-shaped guide vanes between the guide sleeve and the exhaust pipe, the plurality of arc-shaped guide vanes being spirally arranged along the central axis of the exhaust pipe, and a streamlined guide cone at the top of the exhaust pipe, the top of the guide cone being fitted with a mesh cover.

[0006] Preferably, the bottom end of the flow guide cone is connected to the interior of the connecting pipe, and an activated carbon plate is installed on the top inner side of the flow guide cone.

[0007] Preferably, the exhaust pipe has a float ball arranged axially inside, and a guide sleeve is connected to the bottom side of the exhaust pipe via a mounting rod. The bottom of the float ball has a guide rod, which is inserted into the guide sleeve.

[0008] Preferably, the float is made of hollow stainless steel and filled with a polyurethane foam layer. During normal ventilation, the float is suspended above the inside of the exhaust pipe by its own buoyancy, maintaining an initial gap with the top of the inner side of the exhaust pipe. When the external wind pressure pushes the float to compress the buoyancy, the spherical surface of the float fits into the inner side of the exhaust pipe. The inner diameter of the top side of the exhaust pipe is larger than the inner diameter of the bottom side of the exhaust pipe.

[0009] Preferably, the connecting pipe is connected to a suction pipe on its side, and a suction valve is installed on the suction pipe.

[0010] Preferably, the bottom side of the guide sleeve has several discharge ports.

[0011] Preferably, a baffle plate is connected to the top of the mesh cover.

[0012] The beneficial effects of this utility model are:

[0013] 1. The spiral guide channel formed by the guide sleeve and the spirally arranged arc-shaped guide vanes converts the kinetic energy of the external airflow into rotational kinetic energy, significantly reducing the impact of forward wind pressure on the exhaust pipe, effectively preventing backflow of wind, and improving the stability of the drainage system in strong wind environments.

[0014] 2. The system uses both a mesh and a baffle plate to intercept external debris, and the discharge port can promptly remove debris from the guide sleeve, preventing blockage of the vent. The activated carbon plate effectively adsorbs odorous gases, purifies the exhaust air, and improves environmental quality.

[0015] 3. The combination of float and conical exhaust pipe achieves a dynamic balance between ventilation and sealing. Under normal operating conditions, ventilation is smooth, and automatic sealing occurs when the wind pressure is abnormal. No additional power is required, and the structure is simple and highly reliable.

[0016] 4. The air replenishment assembly, consisting of an air intake pipe and an air intake valve, can replenish fresh air in a timely manner when the air pressure in the pipeline decreases, maintain air pressure balance, ensure the normal operation of the drainage system, and prevent water seal damage and drainage obstruction caused by negative pressure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the exhaust pipe structure in this utility model.

[0020] Reference numerals in the attached drawings: 1. Drain pipe; 2. Connecting pipe; 3. Suction pipe; 31. Suction valve; 4. Guide sleeve; 41. Impurity outlet; 5. Exhaust pipe; 51. Guide cone; 52. Mesh cover; 53. Activated carbon plate; 6. Arc-shaped guide plate; 7. Impurity baffle; 8. Mounting rod; 81. Guide sleeve; 82. Guide rod; 9. Float. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Example

[0023] Please refer to Figures 1-3 The drainage system ventilation structure includes drain pipes, connecting pipes, exhaust pipes, and auxiliary functional components. The specific structure and connection relationships of each component are as follows:

[0024] Drainage pipe 1 serves as the main pipe of the drainage system, used to transport sewage.

[0025] The connecting pipe 2 is horizontally connected to the upper side wall of the drain pipe 1. One end of the pipe is connected to the inner cavity of the drain pipe 1, and the other end is connected to the bottom of the exhaust pipe 5, forming a ventilation channel between the drainage system and the outside world.

[0026] In the backflow prevention section, the exhaust pipe 5 is vertically installed at the end of the connecting pipe 2, with its bottom connected to the inner cavity of the connecting pipe 2 and its top extending to the external atmospheric environment. The inner diameter of the top side of the exhaust pipe 5 is larger than that of the bottom side, forming a frustum-shaped structure that is wider at the top and narrower at the bottom, which facilitates the float 9 to achieve self-adaptive sealing under the action of airflow.

[0027] The guide sleeve 4 is fitted onto the outer middle of the exhaust pipe 5, forming an annular cavity between them. The bottom end of the guide sleeve 4 is fixedly connected to the top of the connecting pipe 2, and the top end is closed. Several discharge ports 41 are provided on the bottom side of the guide sleeve 4 for discharging debris from inside the guide sleeve.

[0028] Multiple arc-shaped guide vanes 6 are evenly arranged in a spiral along the central axis of the exhaust pipe 5, with one end fixed to the outer wall of the exhaust pipe 5 and the other end fixed to the inner wall of the guide sleeve 4. The spirally arranged arc-shaped guide vanes 6 form a spiral guide channel. When the external airflow blows towards the exhaust pipe 5, the airflow rotates and rises along the spiral channel. Through centrifugal force, the direct impact of the forward wind pressure on the exhaust pipe 5 is reduced, thereby effectively preventing backflow.

[0029] The guide cone is installed at the top of the exhaust pipe 5 and has a streamlined conical structure. Its bottom end is connected to the inner cavity of the exhaust pipe 5, and its top end extends into the inside of the mesh cover 52. The streamlined design can guide the airflow smoothly, reduce air resistance, and prevent rainwater from falling directly into the exhaust pipe 5.

[0030] The activated carbon plate 53 is horizontally installed on the top inner side of the guide cone 51 and fixed by clips or bolts. The activated carbon plate 53 can adsorb odorous gases discharged from the pipeline, purify the exhaust air, and reduce environmental pollution.

[0031] A mesh cover 52 is installed on top of the guide cone 51 and is fixedly connected to the top of the exhaust pipe 5 by bolts. The mesh cover 52 is made of metal wire mesh and is used to intercept external debris such as leaves and insects to prevent them from entering the exhaust pipe 5 and causing blockage. A baffle plate 7 is connected to the top of the mesh cover 52. The baffle plate 7 is circular or polygonal flat and is fixed to the top of the mesh cover 52 by a bracket to further enhance the debris interception effect.

[0032] The float 9 is located inside the exhaust pipe 5. It is made of hollow stainless steel and filled with a polyurethane foam layer, making it lightweight, corrosion-resistant, and buoyant. A guide rod 82 is fixedly connected to the bottom of the float 9.

[0033] Mounting rod 8 and guide sleeve 81 are connected. Mounting rod 8 is T-shaped, with its bottom end fixed to the inner bottom side of exhaust pipe 5 by bolts, and its top end fixedly connected to guide sleeve 81. Guide sleeve 81 is a hollow cylindrical sleeve, and guide rod 82 is vertically inserted into guide sleeve 81 with a small gap between them, allowing guide rod 82 to slide up and down within guide sleeve 81, thereby limiting the lateral displacement of float 9 and ensuring its smooth movement along the axial direction of exhaust pipe 5.

[0034] During normal ventilation, the float 9 is suspended above the inside of the exhaust pipe 5 by its own buoyancy, maintaining an initial gap with the top of the inner side of the exhaust pipe 5 to ensure smooth ventilation. When the external wind pressure increases, the wind pressure pushes the float 9 downward to compress the buoyancy. The spherical surface of the float 9 fits tightly with the truncated cone section of the inner side of the exhaust pipe 5, which is wider at the top and narrower at the bottom, forming a seal and preventing the backflow of external airflow. When the wind pressure decreases, the float 9 returns to its original position under the action of buoyancy, and ventilation is restored.

[0035] The suction pipe 3 is connected to the side of the connecting pipe 2, with one end penetrating the inner cavity of the connecting pipe 2 and the other end extending into the building or other suitable location, such as an outdoor clean air area. A suction valve 31 is installed on the suction pipe 3. The suction valve 31 is a one-way valve, allowing only outside air to enter the connecting pipe 2 through the suction pipe 3, while preventing the gas inside the pipe from flowing back out. When the air pressure in the drainage system decreases, fresh outside air is supplied to the connecting pipe 2 and the drain pipe 1 through the suction pipe 3 and the suction valve 31 to maintain the air pressure balance within the pipes and prevent water seal disruption.

[0036] In some specific installations of this application, the connecting pipe is connected to the exhaust pipe by: one end of the connecting pipe 2 is fixed to the upper side wall of the drain pipe 1 by welding or flange connection to ensure good sealing at the connection; the other end is connected to the bottom of the exhaust pipe 5 by flange connection, and the exhaust pipe 5 extends vertically upward.

[0037] The installation of the guide sleeve and the arc-shaped guide plate is as follows: The guide sleeve 4 is fitted onto the middle of the exhaust pipe 5, and the bottom end of the guide sleeve 4 is fixed to the top of the connecting pipe 2 by bolts or welding. The arc-shaped guide plate 6 is made of stainless steel, and its two ends are fixed to the outer wall of the exhaust pipe 5 and the inner wall of the guide sleeve 4 by welding, respectively. The spiral angle between adjacent arc-shaped guide plates 6 is 30°-60°, forming a uniform spiral guide channel.

[0038] The top component installation involves inserting the bottom end of the guide cone 51 into the top cavity of the exhaust pipe 5 and fixing it by welding; placing the activated carbon plate 53 in the slot on the top inner side of the guide cone 51 to ensure a firm installation; fixing the mesh cover 52 to the top of the exhaust pipe 5 with bolts to cover the guide cone 51; and welding the baffle plate 7 to the center of the top of the mesh cover 52 with a bracket.

[0039] The float assembly is installed as follows: the bottom end of the mounting rod 8 is fixed to the center of the bottom side of the exhaust pipe 5 by bolts, and the guide sleeve 81 is fixed to the top of the mounting rod 8; the guide rod 82 at the bottom of the float 9 is inserted into the guide sleeve 81 to ensure that the float 9 can slide freely up and down along the guide sleeve 81, and the initial gap between the float 9 and the top of the inner side of the exhaust pipe 5 is 10-20mm.

[0040] The suction pipe installation includes: one end of the suction pipe 3 is connected to the side of the connecting pipe 2 by welding or threaded connection, and the other end extends to a predetermined position. The suction valve 31 is installed in the middle of the suction pipe 3 by thread.

[0041] Working Principle: 1. Normal Ventilation State: When the drainage system is running, the exhaust gas generated in the pipe enters the exhaust pipe 5 through the connecting pipe 2. The exhaust gas first flows upward through the initial gap between the float 9 and the top of the exhaust pipe 5. Guided by the flow guide cone 51, the airflow is evenly diffused to the mesh cover 52, and after being filtered by the activated carbon plate 53 to remove odors, it is discharged to the outside. At the same time, when the air pressure in the pipe decreases, fresh air from the outside can be replenished into the connecting pipe 2 through the suction pipe 3 and the suction valve 31 to maintain air pressure balance.

[0042] 2. Backflow Prevention: When strong winds occur, the airflow blows towards the top of the exhaust pipe 5, and some of the airflow rotates and rises along the spiral guide channel between the guide sleeve 4 and the exhaust pipe 5. Due to the guiding effect of the spiral guide vane 6, the kinetic energy of the airflow is converted into rotational kinetic energy, and the forward wind pressure is significantly reduced. If the remaining wind pressure is still relatively high, the wind pressure will push the float 9 downward. The spherical surface of the float 9 fits tightly against the inner side of the upper wider and lower narrower conical section of the exhaust pipe 5, forming a seal and preventing external airflow from backflowing into the pipe. When the wind speed decreases, the float 9 returns to its original position under its own buoyancy, restoring ventilation.

[0043] 3. Debris interception and discharge: External debris such as leaves and insects are intercepted by the net cover 52 and the baffle plate 7, preventing them from entering the exhaust pipe 5; a small amount of debris that enters the gap between the guide sleeve 4 and the exhaust pipe 5 falls into the connecting pipe 2 or the drain pipe 1 through the discharge port 41 under the action of airflow rotation, or is connected to other sewage discharge structures, thus discharging sewage and avoiding blockage of the ventilation channel.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilated structure for a drainage system, comprising a drain pipe (1) connected to a connecting pipe (2), characterized in that, The connecting pipe (2) is connected to an exhaust pipe (5). A windproof backflow prevention section is provided between the exhaust pipe (5) and the connecting pipe (2). The windproof backflow prevention section includes a guide sleeve (4) located outside the exhaust pipe (5). A plurality of arc-shaped guide vanes (6) are provided between the guide sleeve (4) and the exhaust pipe (5). The plurality of arc-shaped guide vanes (6) are spirally arranged along the central axis of the exhaust pipe (5). The top of the exhaust pipe (5) has a streamlined guide cone (51). A mesh cover (52) is installed on the top of the guide cone (51).

2. The ventilation structure of the drainage system according to claim 1, characterized in that: The bottom end of the guide cone (51) is connected to the inside of the connecting pipe (2), and an activated carbon plate (53) is installed on the top inner side of the guide cone (51).

3. The ventilation structure of the drainage system according to claim 2, characterized in that: The exhaust pipe (5) has a float (9) arranged axially inside. The bottom side of the exhaust pipe (5) is connected to a guide sleeve (81) by a mounting rod (8). The bottom of the float (9) has a guide rod (82) inserted into the guide sleeve (81).

4. The ventilation structure of the drainage system according to claim 3, characterized in that: The float (9) is made of hollow stainless steel and filled with polyurethane foam. During normal ventilation, the float (9) is suspended above the inside of the exhaust pipe (5) by its own buoyancy, maintaining an initial gap with the top of the inner side of the exhaust pipe (5). When the external wind pressure pushes the float (9) to compress the buoyancy, the spherical surface of the float (9) is in contact with the inner side of the exhaust pipe (5). The inner diameter of the top side of the exhaust pipe (5) is larger than the inner diameter of the bottom side of the exhaust pipe (5).

5. The ventilated structure of the drainage system according to claim 4, characterized in that: The connecting pipe (2) is connected to a suction pipe (3) on its side, and a suction valve (31) is installed on the suction pipe (3).

6. The ventilation structure of the drainage system according to claim 1, characterized in that: The bottom side of the guide sleeve (4) is provided with several discharge ports (41).

7. The ventilation structure of the drainage system according to claim 1, characterized in that: The top of the mesh cover (52) is connected to a baffle plate (7).

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