Building drainage pipeline

Abstract

The invention relates to the technical field of drainage systems, and provides a building drainage pipeline which comprises a main drainage pipe, a water seal type component and a check valve, the check valve comprises a valve body, a valve plate and an air supplementing plate, the two ends of the valve body are provided with a water inlet and a water outlet respectively, the water inlet is communicated with the water outlet, and the water inlet is communicated with the air supplementing plate. The valve body and the water seal type component are respectively communicated with the water seal type component and the main drainage pipe in a sealing manner through pipelines, and an air hole is formed in the side part of the valve body and is communicated with the water outlet; the valve plate and the air supplementing plate are rotationally arranged in the water outlet and block the water inlet and the air hole correspondingly. By arranging the air hole and the air supplementing plate and enabling the opening pressure of the air supplementing plate to be smaller than that of the valve plate, air can be supplemented into the drainage pipeline through the air hole so as to solve the negative pressure problem in the pipeline, the functional effect of the water seal type component is guaranteed, sewage can be prevented from being discharged along the air hole, and normal use of the drainage pipeline is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage systems, and in particular to a building drainage pipeline. Background Art

[0002] Drainage systems play a vital role in modern buildings, industrial facilities, and urban infrastructure. Their primary function is to promptly and efficiently remove sewage, rainwater, and other wastewater from their sources to maintain environmental hygiene and the proper functioning of facilities. Drainage systems typically consist of drainage pipes, drainage fixtures, and various valves.

[0003] The drainage process typically relies on gravity or the power of a drainage pump to move water through pipes. Once the drainage device is in use, wastewater enters the drainage pipe through the outlet. Under the influence of gravity or a pump, it flows down the pipe, ultimately discharging to a wastewater collection point or treatment system. To prevent odors and other contaminants from the drainage pipe from flowing back into the room, a water seal is typically installed within the drainage device.

[0004] Traditional drainage systems face numerous challenges in actual operation, with negative pressure being a prominent issue. For example, Patent Publication No. CN111350240A discloses a negative pressure-resistant same-floor drainage system. This system features vertical and horizontal drainage pipes to quickly drain wastewater from drainage fixtures. To minimize damage to the drainage system caused by negative pressure, negative pressure-resistant pipes are also included.

[0005] However, when negative pressure is generated in the drainage vertical pipe, the anti-negative pressure baffle will be affected and rotate. This rotation will cause abnormal flow of water in the water seal mechanism connected to the anti-negative pressure pipe, thereby instantly losing the original protective effect of the water seal mechanism, causing odor to flow back into the room, affecting the normal use of the drainage system. Summary of the Invention

[0006] In view of this, the present invention proposes a building drainage pipeline, which can eliminate the impact of negative pressure problems on water-sealed components and ensure the normal use of the drainage system.

[0007] The technical solution of the present invention is implemented as follows: The present invention provides a building drainage pipeline, including a main drainage pipe, a water-sealed component and an anti-return valve, wherein the anti-return valve includes a valve body, a valve plate and an air supply plate, wherein: A water inlet and a water outlet are respectively provided at both ends of the valve body, the water inlet and the water outlet are connected, and the two are respectively connected to the water seal component and the main drain pipe through pipe sealing. An air hole is opened on the side of the valve body, and the air hole is connected to the water outlet; The valve plate and the air supply plate are both rotatably arranged in the water outlet and respectively block the water inlet and the air hole. When the valve plate is subjected to a negative pressure greater than its opening pressure, it rotates and separates from the water inlet. When the air supply plate is subjected to a negative pressure greater than its opening pressure, it rotates and separates from the air hole. The opening pressure of the valve plate is greater than the opening pressure of the air supply plate.

[0008] On the basis of the above technical solution, preferably, a sink groove is opened on the inner wall of the water outlet, and the air supply plate is located in the sink groove when blocking the air hole.

[0009] More preferably, a first plane is provided in the water outlet, the air holes and the sink are provided on the first plane, and the first plane is perpendicular to a horizontal plane.

[0010] More preferably, a second plane is provided at one end of the water outlet close to the water inlet, the second plane is continuously provided with the first plane and is perpendicular to the horizontal plane; The distance between the axis of the water outlet and the second plane is smaller than the distance between the axis of the water outlet and the first plane, and the second plane is spaced apart from the inner wall of the water inlet close to one end of the water outlet.

[0011] More preferably, an arc surface is provided at one end of the water inlet close to the water outlet, the arc surface corresponds to the position of the second plane, and the distance between the arc surface and the axis of the water outlet gradually decreases in the direction close to the water outlet.

[0012] On the basis of the above technical solution, preferably, the top end of the valve plate is rotatably arranged above the water outlet, and when the side of the valve plate away from the water inlet is against the top side of the water outlet, the plane of the valve plate close to the water inlet intersects with the air supply plate.

[0013] On the basis of the above technical solution, preferably, the weight of the valve plate is G1, the weight of the air supply plate is G2, when the valve plate blocks the water inlet, the angle between the valve plate and the vertical plane is A, when the air supply plate blocks the air hole, the angle between the air supply plate and the vertical plane is B, wherein G1>G2, 90°>A>B.

[0014] More preferably, there are two of each of the air holes and the air supply plate, and they correspond one to one; The two air holes are arranged oppositely on both sides of the water inlet.

[0015] On the basis of the above technical solution, preferably, a water replenishment system is further included, wherein the water replenishment system includes a water inlet pipe, a water replenishment pipe, a solenoid valve and a water level sensor, wherein, The water supply pipe is arranged in communication between the water-sealed component and the water inlet pipe; The solenoid valve is connected and arranged in the water supply pipe; The water level sensor is fixedly arranged in the water-sealed component and is electrically connected to the solenoid valve.

[0016] On the basis of the above technical solution, preferably, it further includes a branch connector, two of the water-sealed components are provided, and the branch connector includes a tee, a mounting plate and a connecting pipe, wherein, The tee is provided with a first interface, a second interface and a third interface, the first interface is in sealed communication with the water inlet via a pipe, the axis of the first interface coincides with the axis of the second interface and the axis of the water inlet, and is perpendicular to the axis of the third interface; The mounting plate is fixedly disposed in the second interface; One end of the connecting pipe is sealed and fixed in the mounting plate, and the other end extends into the tee. The connecting pipe and the third interface are sealed and connected with the two water-sealed components respectively, and the bottom side of the connecting pipe is located above the bottom side of the third interface. The axis of the connecting pipe is parallel to the axis of the first interface and is arranged at intervals.

[0017] The building drainage pipeline of the present invention has the following beneficial effects compared with the prior art: (1) By setting air holes and air supply plates, and making the opening pressure of the air supply plates lower than the opening pressure of the valve plate, not only can air be supplied into the drainage pipe through the air holes to solve the negative pressure problem in the pipe and ensure the functional effect of the water-sealed component, but also sewage can be prevented from being discharged along the air holes, ensuring the normal use of the drainage pipe; (2) By setting the sink, the first plane, the second plane and the arc surface, not only can the water flow in the valve body avoid the air supply plate as much as possible, ensuring the normal use of the air supply plate, but also can ensure the smooth flow of water in the valve body; (3) By setting up a water replenishment system and arranging a water inlet pipe, a water replenishment pipe, an electromagnetic valve and a water level sensor in the water replenishment system, the water level in the water seal mechanism can be monitored in real time, and water can be automatically replenished into the water seal mechanism, effectively dealing with the problem of water shortage and failure of the water seal mechanism caused by long-term non-use of the water seal component or evaporation of water in the water seal mechanism, thereby ensuring the normal operation and long-term stability of the water seal component; (4) By setting up branch connectors and setting up tees, mounting plates and pipes in the branch connectors, the water in multiple water-sealed components can flow into the valve body evenly, so as to further improve the flow stability of the water body and ensure the stable operation of the valve plate and the air supply plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a partial three-dimensional diagram of a building drainage pipeline of the present invention; Figure 2 This is a three-dimensional diagram of an anti-reverse valve and a branch connector in a building drainage pipeline of the present invention; Figure 3 A cross-sectional view of an anti-return valve in a building drainage pipeline according to the present invention, with the valve plate blocking the water inlet; Figure 4 A cross-sectional view of an anti-return valve in a building drainage pipeline according to the present invention, in a state where the valve plate does not block the water inlet; Figure 5 This is a cross-sectional view of an air supply plate in a building drainage pipeline according to the present invention; Figure 6 A three-dimensional diagram of the interior of an anti-return valve in a building drainage pipeline according to the present invention; Figure 7 This is an exploded view of a baffle in a building drainage pipeline according to the present invention; Figure 8 This is an exploded view of an air hole in a building drainage pipeline according to the present invention; Figure 9 This is a three-dimensional diagram of a water replenishment system in a building drainage pipeline according to the present invention; Figure 10 It is a cross-sectional view of a branch connector in a building drainage pipeline according to the present invention; Figure 11 This is a three-dimensional diagram of a connecting pipe in a building drainage pipeline according to the present invention; Figure 12 It is a three-dimensional diagram of a building drainage pipeline of the present invention.

[0020] Among them: 1. Main drain pipe; 2. Water-sealed component; 3. Anti-return valve; 31. Valve body; 32. Valve plate; 33. Air supply plate; 301. Water inlet; 3011. Arc surface; 302. Water outlet; 3021. First plane; 3022. Second plane; 303. Air hole; 304. Sump; 4. Water supply system; 41. Water inlet pipe; 42. Water supply pipe; 43. Solenoid valve; 44. Water level sensor; 5. Branch connector; 51. Tee; 52. Mounting plate; 53. Connecting pipe; 501. First interface; 502. Second interface; 503. Third interface. DETAILED DESCRIPTION

[0021] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The present invention provides a building drainage system comprising a main drain pipe 1, a water-sealed component 2, a check valve 3, a water replenishment system 4, and a branch connector 5. The system is designed to be deployed within a building to promptly drain sewage and wastewater generated during daily life, effectively preventing the growth and spread of pathogens and protecting public health. Furthermore, the smooth operation of the drainage system reduces problems such as water accumulation and odor, improving people's quality of life.

[0023] Drainage appliances are essential for daily life and production, and come in a variety of forms, including kitchen and bathroom sinks, washbasins, toilets, showerheads, and floor drains. To enhance the protective performance of drainage systems, some drainage appliances are equipped with a water seal mechanism. The water seal component 2 is a drainage appliance equipped with a water seal mechanism.

[0024] A water seal utilizes a high level of hydrostatic pressure to counteract pressure fluctuations within a drainage pipe, thereby preventing gases, odors, pests, and other contaminants from entering a room. This device typically consists of a U-shaped trap, water seal box, or similar structure at a specific location in the drainage system. This trap retains a certain amount of water, which acts as a "seal."

[0025] The water in the water seal mechanism acts as a barrier, effectively preventing toxic and harmful gases and pests such as cockroaches and rats from entering the room. Common water seal components 2 include flush toilets, floor drains, and bathtubs.

[0026] The main drainage pipe 1 is usually installed vertically in the building, and the wastewater and sewage generated by the drainage equipment are first collected in the main drainage pipe 1 and then discharged to the designated location. Figure 12 As shown, the floor drain and flush toilet in the figure are both water-sealed components 2, which are connected to the main drain pipe 1 through pipes. When the water-sealed component 2 produces wastewater, the wastewater can flow into the main drain pipe 1 through the horizontal pipe.

[0027] The anti-return valve 3 is also called a non-return valve or a check valve, and its main function is to prevent the reverse flow of the fluid. Figure 1As shown, the anti-return valve 3 is installed on the transverse branch of the main drain pipe 1 and the water-sealed component 2. The wastewater and sewage generated by the water-sealed component 2 can flow forward into the main drain pipe 1 through the anti-return valve 3, while the wastewater and sewage in the main drain pipe 1 will not flow back into the water-sealed component 2, thereby ensuring the normal operation of the water-sealed component 2.

[0028] During the operation of the drainage pipeline, a certain negative pressure is usually generated. For example, when the main drainage pipe 1 is long and there is no proper ventilation facility, the water flow in the main drainage pipe 1 may form a local vacuum during the flow process, resulting in the generation of negative pressure.

[0029] Negative pressure can cause water in the water seal to be sucked out or ejected, thus destroying the integrity of the water seal. Once the water seal is destroyed, harmful gases, odors, or insects and rodents in the drainage pipes will enter the room through the pipes, affecting indoor air quality and safety.

[0030] To this end, the anti-return valve 3 is configured to include a valve body 31, a valve plate 32 and an air supply plate 33. Figure 3 As shown, the two ends of the valve body 31 are respectively provided with a water inlet 301 and a water outlet 302, the water inlet 301 and the water outlet 302 are connected, and the water inlet 301 is connected to the water seal component 2 through a pipeline seal, and the water outlet 302 is connected to the main drain pipe 1 through a pipeline seal. The valve plate 32 is rotatably set in the water outlet 302 to block the water inlet 301. Figure 4 As shown, when the water-sealed component 2 produces sewage, it can impact the valve plate 32 to rotate, so that the sewage can be discharged from the water outlet 302 and flow into the main drain pipe 1; Figure 3 As shown, in a natural state or when the sewage in the main drainage pipe 1 flows into the water outlet 302 , the valve plate 32 blocks the water inlet 301 , thereby preventing the sewage, odor or insects and rodents in the main drainage pipe 1 from flowing back to the water inlet 301 .

[0031] An air hole 303 is provided on the side of the valve body 31, which is connected to the water outlet 302 and is located on the side of the valve plate 32 away from the water inlet 301. The air hole 303 is connected to the outside atmosphere. By utilizing the connection between the air hole 303 and the water outlet 302, the interior of the main drain pipe 1 can be connected to the outside atmosphere, thereby offsetting the negative pressure problem in the main drain pipe 1 and ensuring the normal operation of the water seal mechanism in the water seal component 2.

[0032] like Figure 5As shown, the air-supplying plate 33 is rotatably arranged in the water outlet 302 to block the air hole 303. Under natural conditions or when sewage appears in the water outlet 302, the air-supplying plate 33 blocks the air hole 303 to prevent sewage, odor or insects and rodents from entering the external environment through the air hole 303. When negative pressure is generated in the water outlet 302, the air-supplying plate 33 rotates inward and separates from the air hole 303. At this time, air in the external environment enters the water outlet 302 to offset the negative pressure.

[0033] When the negative pressure in the water outlet 302 reaches a certain value, the air supply plate 33 and the valve plate 32 can rotate. The negative pressure value and the opening pressure of the air supply plate 33 and the valve plate 32, the valve plate 32 rotates and separates from the water inlet 301 when subjected to a negative pressure greater than its opening pressure, and the air supply plate 33 rotates and separates from the air hole 303 when subjected to a negative pressure greater than its opening pressure. In order to eliminate the influence of negative pressure on the water seal mechanism in the water-sealed component 2, the opening pressure of the valve plate 32 should be greater than the opening pressure of the air supply plate 33.

[0034] If the opening pressure of the valve plate 32 is P1, the opening pressure of the air supply plate 33 is P2, and the negative pressure generated at the water outlet 302 is P3. When the negative pressure generated at the water outlet 302 is small, and P3<P2<P1, the valve plate 32 blocks the water inlet 301, and the air supply plate 33 blocks the air hole 303; when the negative pressure generated at the water outlet 302 increases, and P2<P3<P1, the valve plate 32 blocks the water inlet 301, and the air supply plate 33 rotates and separates from the air hole 303, and the air in the external environment enters the water inlet 301 to weaken or offset the negative pressure generated at the water outlet 302; when the negative pressure generated at the water outlet 302 increases, and P2<P1<P3, it is still preferred to let the air supply plate 33 rotate and separate from the air hole 303, and the air in the external environment enters the water inlet 301 to weaken or offset the negative pressure generated at the water outlet 302, which can also prevent the negative pressure generated at the water outlet 302 from driving the valve plate 32 to rotate.

[0035] like Figure 3 and Figure 5 As shown, the valve plate 32 and the air supply plate 33 are both tilted in their natural state, thereby achieving a good sealing effect. Assuming that the weight of the valve plate 32 is G1 and the weight of the air supply plate 33 is G2, it is preferred that G1>G2, that is, the weight of the valve plate 32 is greater than the weight of the air supply plate 33. When other conditions are the same, the opening pressure of the valve plate 32 can be greater than the opening pressure of the air supply plate 33.

[0036] Similarly, if Figure 3 As shown, when the valve plate 32 blocks the water inlet 301, the angle between the valve plate 32 and the vertical plane is A. Figure 5As shown, when the air supply plate 33 blocks the air hole 303, the angle between the air supply plate 33 and the vertical plane is B. Preferably, 90°>A>B. When other conditions are the same, the opening pressure of the valve plate 32 can also be greater than the opening pressure of the air supply plate 33.

[0037] The valve plate 32 and the air supply plate 33 are made of the same material. When the weight of the air supply plate 33 needs to be smaller than the weight of the valve plate 32, the specifications of the air supply plate 33 usually need to be smaller than the specifications of the valve plate 32. This will reduce the inner diameter of the air hole 303, thereby weakening the air supply effect of the air hole 303; for this reason, two air holes 303 and two air supply plates 33 are provided, and the two air holes 303 and the two air supply plates 33 correspond one to one.

[0038] It is preferred that the two air holes 303 are relatively arranged on both sides of the water inlet 301 to maintain consistency in the air supply conditions of the two. Of course, in actual application, one of the air holes 303 can be blocked and only one of the air holes 303 can be used.

[0039] In actual application, one end of the pipe can be inserted into the air hole 303, and the other end of the pipe can be placed in a safe position to ensure the normal operation of the gas replenishment operation and achieve safe operation conditions.

[0040] To prevent sewage from affecting the sealing effect of the air supply plate 33 when flowing through the water outlet 302, the air hole 303 should be raised so that the bottom side of the air supply plate 33 is separated from the bottom side of the water outlet 302. During normal operation of this drainage pipeline, sewage generated by the water-sealed component 2 will not touch the air supply plate 33 when passing through the water outlet 302.

[0041] The top end of the valve plate 32 is rotatably arranged above the water outlet 302. When the side of the valve plate 32 away from the water inlet 301 abuts against the top side of the water outlet 302, the separation distance between the valve plate 32 and the water inlet 301 is the largest. Figure 4 As shown, at this time, the plane of the valve plate 32 close to the water inlet 301 should intersect with the air supply plate 33. When the sewage flowing into the water inlet 301 hits the side of the valve plate 32 close to the water inlet 301, it will be dispersed along the side, thereby hitting the side of the air supply plate 33 away from the air hole 303, making the air supply plate 33 closer to the air hole 303.

[0042] In order to reduce the disturbance of the sewage flow channel to the air supply plate 33, further improvements are made to the inner wall structure of the valve body 31. Figure 6 As shown, a sink 304 is provided on the inner wall of the water outlet 302 , and the air supply plate 33 is located in the sink 304 when blocking the air hole 303 , thereby reducing the probability of sewage contacting the air supply plate 33 when flowing.

[0043] like Figure 6As shown, a first plane 3021 is provided in the water outlet 302, and the air hole 303 and the sink 304 are arranged on the first plane 3021, and the first plane 3021 is perpendicular to the horizontal plane. The first plane 3021 is equivalent to providing a planar protrusion on the curved inner wall of the valve body 31, which can not only make the flowing sewage stay away from the air supply plate 33, but also make the sewage at the position of the air supply plate 33 flow more smoothly, reducing the flow fluctuation of the sewage.

[0044] like Figure 6 As shown, a second plane 3022 is provided at one end of the water outlet 302 near the water inlet 301. The second plane 3022 is continuously arranged with the first plane 3021 and is also perpendicular to the horizontal plane. The distance between the axis of the water outlet 302 and the second plane 3022 is smaller than the distance between the axis of the water outlet 302 and the first plane 3021, and the second plane 3022 is spaced apart from the inner wall of the water inlet 301 near one end of the water outlet 302. The second plane 3022 is located behind the first plane 3021 along the sewage flow direction, and also plays a role in improving the stability of the sewage flow, so that the sewage flowing to the first plane 3021 is more stable.

[0045] like Figure 3 、 Figure 4 and Figure 6 As shown, an arc surface 3011 is provided at one end of the water inlet 301 near the water outlet 302, the arc surface 3011 corresponds to the position of the second plane 3022, and the distance between the arc surface 3011 and the axis of the water outlet 302 gradually decreases in the direction approaching the water outlet 302, thereby forming a plane that can abut against the valve plate 32, and a sealing effect is achieved by utilizing the abutment between the valve plate 32 and the plane.

[0046] The valve body 31 can be provided as a split structure, such as Figure 8 As shown, an air hole 303 is opened on the main body of the valve body 31, and the air supply plate 33 is set on the split component of the valve body 31, so that the split component of the valve body 31 can be disassembled from the main body of the valve body 31, thereby facilitating maintenance of the air supply plate 33.

[0047] like Figure 7 and Figure 8 As shown, corresponding fool-proof structures, such as blocks and slots, should also be provided on the main body of the valve body 31 and the split components of the valve body 31 to achieve the positioning of the air supply plate 33 and ensure the sealing and air supply effects of the air supply plate 33.

[0048] Under normal circumstances, the water in the water seal will slowly evaporate over time. This evaporation rate is particularly rapid in hot, dry environments, or when the drainage device is not used for extended periods. Once the water seal dries up, gases, odors, and pests trapped in the drainage pipes can enter the room directly through the drain pipes, damaging the indoor environment and affecting people's lives and health.

[0049] The water supply system 4 includes a water inlet pipe 41, a water supply pipe 42, a solenoid valve 43 and a water level sensor 44. Figure 9 As shown, the water inlet pipe 41 is a pipe that provides water to the water-sealed component 2, which is connected to the water source equipment. The water supply pipe 42 is connected and arranged between the water-sealed component 2 and the water inlet pipe 41. The solenoid valve 43 is connected and arranged in the water supply pipe 42. The water level sensor 44 is fixedly arranged in the water-sealed component 2 and is electrically connected to the solenoid valve 43.

[0050] The water level sensor 44 can convert the water level parameter of the measured point into a corresponding electrical signal in real time and transmit it to the controller, which enables the system to grasp the water level in the water seal at any time and ensure that the water seal is always in an effective state.

[0051] Working in conjunction with the controller, the water level sensor 44 can precisely control the water replenishment process based on a preset water level. When the water level falls below the preset value, the water level sensor 44 sends a signal to activate the solenoid valve 43 to replenish water. When the water level reaches the preset value, the water level sensor 44 sends a signal to stop replenishing water.

[0052] Combining the water level sensor 44 and the solenoid valve 43 with the water inlet pipe 41 enables real-time monitoring of the water seal and precise water replenishment. This combination not only ensures that the water seal is always effective and prevents odorous gases and harmful microorganisms from the main drain pipe 1 from entering the room, but also improves water conservation and reduces water waste. Furthermore, this combination reduces the frequency and cost of manual inspections, making drainage system maintenance and management more convenient and efficient.

[0053] There are usually multiple water-sealing components 2 used in a building. When multiple water-sealing components 2 are connected to the anti-return valve 3, the flow stability of the sewage in the anti-return valve 3 will be affected. For this reason, a branch connector 5 is set between the anti-return valve 3 and the water-sealing component 2.

[0054] Taking two water-sealed components 2 as an example, the branch connector 5 includes a tee 51, a mounting plate 52 and a pipe 53. Figure 10 and Figure 11As shown, the tee 51 is provided with a first interface 501, a second interface 502 and a third interface 503. The first interface 501 is sealed and connected to the water inlet 301 through a pipe. The axis of the first interface 501 coincides with the axis of the second interface 502 and the axis of the water inlet 301, and is perpendicular to the axis of the third interface 503. The mounting plate 52 is fixedly arranged in the second interface 502, and one end of the connecting pipe 53 is sealed and fixed in the mounting plate 52, and the other end extends into the tee 51. The connecting pipe 53 and the third interface 503 are respectively sealed and connected to the two water-sealed components 2, and the bottom side of the connecting pipe 53 is located above the bottom side of the third interface 503. By utilizing this extended structure, the sewage in the tee 51 can be prevented from flowing back into the connecting pipe 53, thereby also having a certain anti-backflow effect.

[0055] like Figure 10 As shown, the axis of the connecting pipe 53 is parallel to the axis of the first interface 501 and is arranged at intervals. The axis of the first interface 501 is located between the axis of the connecting pipe 53 and the third interface 503. With this structural design, when water comes from the second interface 502 and the third interface 503 at the same time, the impact of the two streams of sewage can be reduced, thereby improving the operating stability of the drainage pipeline.

[0056] The working principle of a building drainage pipeline of the present invention is as follows: When negative pressure builds up in the main drain pipe 1, the air-supplementing plate 33 rotates and separates from the air hole 303, allowing air from the outside environment to enter the water outlet 302, thereby offsetting the negative pressure in the main drain pipe 1 and preventing the valve plate 32 from rotating. When sewage builds up in the water-sealed component 2, the sewage impacts the valve plate 32, causing it to rotate and separate from the water inlet 301, allowing the sewage to flow into the main drain pipe 1. Simultaneously, the sewage pushes against the side of the air-supplementing plate 33 away from the air hole 303, ensuring that the air-supplementing plate 33 maintains its sealing effect on the air hole 303, preventing the sewage from being discharged into the outside environment through the air hole 303.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A building drainage pipeline, characterized by: It comprises a main drainage pipe (1), a water-sealed component (2) and an anti-return valve (3), wherein the anti-return valve (3) comprises a valve body (31), a valve plate (32) and an air supply plate (33), wherein: The valve body (31) is provided with a water inlet (301) and a water outlet (302) at both ends, the water inlet (301) and the water outlet (302) are connected, and are respectively connected to the water seal component (2) and the main drain pipe (1) through pipeline sealing. The valve body (31) is provided with an air hole (303) on the side, and the air hole (303) is connected to the water outlet (302); The valve plate (32) and the air supply plate (33) are both rotatably arranged in the water outlet (302) and respectively block the water inlet (301) and the air hole (303). When the valve plate (32) is subjected to a negative pressure greater than its opening pressure, it rotates and separates from the water inlet (301). When the air supply plate (33) is subjected to a negative pressure greater than its opening pressure, it rotates and separates from the air hole (303). The opening pressure of the valve plate (32) is greater than the opening pressure of the air supply plate (33).

2. A building drainage pipeline according to claim 1, characterized in that: A sink groove (304) is provided on the inner wall of the water outlet (302), and the air supply plate (33) is located in the sink groove (304) when blocking the air hole (303).

3. A building drainage pipeline according to claim 2, characterized in that: A first plane (3021) is provided in the water outlet (302), the air hole (303) and the sink (304) are arranged on the first plane (3021), and the first plane (3021) is perpendicular to a horizontal plane.

4. A building drainage pipeline according to claim 3, characterized in that: A second plane (3022) is provided in the water outlet (302) at one end close to the water inlet (301), and the second plane (3022) is continuously arranged with the first plane (3021) and is perpendicular to the horizontal plane; The distance between the axis of the water outlet (302) and the second plane (3022) is smaller than the distance between the axis of the water outlet (302) and the first plane (3021), and the second plane (3022) is spaced apart from the inner wall of the water inlet (301) close to one end of the water outlet (302).

5. A building drainage pipeline according to claim 4, characterized in that: An arc surface (3011) is provided at one end of the water inlet (301) close to the water outlet (302), the arc surface (3011) corresponds to the position of the second plane (3022), and the distance between the arc surface (3011) and the axis of the water outlet (302) gradually decreases in a direction approaching the water outlet (302).

6. A building drainage pipeline according to claim 1, characterized in that: The top end of the valve plate (32) is rotatably arranged above the water outlet (302). When the side of the valve plate (32) away from the water inlet (301) abuts against the top side of the water outlet (302), the plane of the side of the valve plate (32) close to the water inlet (301) intersects with the air supply plate (33).

7. A building drainage pipeline according to claim 1, characterized in that: The weight of the valve plate (32) is G1, the weight of the air supply plate (33) is G2, when the valve plate (32) blocks the water inlet (301), the angle between the valve plate (32) and the vertical plane is A, when the air supply plate (33) blocks the air hole (303), the angle between the air supply plate (33) and the vertical plane is B, wherein G1>G2, 90°>A>B.

8. A building drainage pipeline according to claim 7, characterized in that: There are two of each of the air holes (303) and the air supply plate (33), and they correspond to each other one by one; The two air holes (303) are arranged oppositely on both sides of the water inlet (301).

9. A building drainage pipeline according to claim 1, characterized in that: It also includes a water replenishment system (4), which includes a water inlet pipe (41), a water replenishment pipe (42), a solenoid valve (43) and a water level sensor (44), wherein: The water supply pipe (42) is arranged in communication between the water-sealed component (2) and the water inlet pipe (41); The solenoid valve (43) is arranged in communication with the water supply pipe (42); The water level sensor (44) is fixedly arranged in the water-sealed component (2) and is electrically connected to the solenoid valve (43).

10. A building drainage pipeline according to claim 1, characterized in that: It also includes a branch connection piece (5), two of the water-sealed components (2) are provided, and the branch connection piece (5) includes a tee (51), a mounting plate (52) and a connecting pipe (53), wherein: The tee (51) is provided with a first interface (501), a second interface (502) and a third interface (503); the first interface (501) is in sealed communication with the water inlet (301) via a pipe; the axis of the first interface (501) coincides with the axis of the second interface (502) and the axis of the water inlet (301), and is perpendicular to the axis of the third interface (503); The mounting plate (52) is fixedly arranged in the second interface (502); One end of the connecting pipe (53) is sealed and fixed in the mounting plate (52), and the other end extends into the tee (51). The connecting pipe (53) and the third interface (503) are sealed and connected to the two water-sealed components (2) respectively, and the bottom side of the connecting pipe (53) is located above the bottom side of the third interface (503). The axis of the connecting pipe (53) is parallel to the axis of the first interface (501) and is spaced apart.

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