Siphon drainage device of sewage pool

Abstract

The invention discloses a sewage pool siphon drainage device which comprises a special-shaped U-shaped siphon, a fixing support and an air extractor, the special-shaped U-shaped siphon comprises a main channel and an auxiliary channel, the main channel comprises a water inlet section, a connecting section and a water outlet section which are connected with one another, and the connecting section is connected with the water inlet section and the water outlet section; the water inlet section is fixed to the inner wall of a sewage pool through a fixing support, the auxiliary channel is connected with the connecting section, the air extractor comprises an air extracting mechanism and a one-way valve, the air extracting mechanism is connected with the auxiliary channel and used for extracting air from the auxiliary channel, and the one-way valve is connected with the auxiliary channel and used for enabling the auxiliary channel to be communicated in a one-way mode and comprises a cavity, a baffle, a fixing nut and an air core. The fixing nut is arranged at the bottom of the cavity and used for connecting the auxiliary channel and the cavity, the air core is arranged at the top of the cavity, the baffle is connected to the lower portion of the air core, an open hole is formed in the baffle, and a closed air bag is arranged in the open hole. Compared with the prior art, the sewage treatment device can realize high-efficiency and zero-energy-consumption discharge of sewage.

Description

Technical Field

[0001] The present invention relates to the technical field of drainage, and particularly to a siphon drainage device for sewage pools. Background Art

[0002] In the field of sewage treatment, the drainage technology of sewage pools is crucial. Traditional sewage pool drainage methods mainly rely on pumping or gravity flow. When using the pumping method, although it can overcome certain drainage height and distance limitations, the entire drainage process completely depends on electric drive, which not only has a high cost in terms of power resource consumption, but also requires regular maintenance of equipment such as pumps, such as replacing worn parts and cleaning blockages. In the long run, the maintenance costs generated significantly increase the economic burden of sewage treatment. For the gravity flow method, although it does not require additional power consumption, it is greatly limited by the water level difference between the sewage pool and the drainage terminal. When the water level difference is insufficient, the drainage efficiency is extremely low, and even effective drainage cannot be achieved, making it difficult to meet the requirements of actual sewage treatment scenarios.

[0003] Existing siphon drainage systems attempt to solve the above problems to a certain extent. However, most siphon drainage systems have obvious defects. Many siphon drainage systems require manual triggering of the siphon process, which is cumbersome and cannot meet the requirements of automated management. Some siphon systems that rely on complex control devices not only increase the equipment cost, but also are prone to failures due to the complexity of the control devices, making it difficult to achieve automatic start-stop and stable operation.

[0004] In view of this, a siphon drainage device for sewage pools is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a siphon drainage device for sewage pools, which can achieve efficient and zero-energy consumption discharge of sewage.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions:

[0007] A sewage tank siphon drainage device, comprising a special-shaped U-shaped siphon, a fixed bracket and an air extraction device. The special-shaped U-shaped siphon includes a main channel and an auxiliary channel. The main channel includes an inlet section, a connecting section and an outlet section that are connected to each other. The connecting section connects the inlet section and the outlet section. The inlet section is fixed to the inner wall of the sewage tank by the fixed bracket. The auxiliary channel connects the connecting section. The air extraction device includes an air extraction mechanism and a one-way valve. The air extraction mechanism is connected to the auxiliary channel for extracting air from the auxiliary channel. The one-way valve is also connected to the auxiliary channel for making the auxiliary channel conduct unidirectionally. The one-way valve includes a cavity, a baffle, a fixing nut and an air core. The fixing nut is provided at the bottom of the cavity for connecting the auxiliary channel and the cavity. The air core is provided at the top of the cavity. The baffle is connected below the air core. An opening is provided on the baffle, and a closed airbag is provided in the opening.

[0008] In a preferred embodiment, the closed airbag is made of rubber material.

[0009] In a preferred embodiment, a plurality of the closed airbags are provided in the opening.

[0010] In a preferred embodiment, a plurality of the openings are provided, and the plurality of openings are evenly arranged.

[0011] In a preferred embodiment, a swirl anti-blocking device is provided at the end of the inlet section. The swirl anti-blocking device includes a plurality of blades and a central disc. One end of the blade is connected to the inner wall of the inlet section, and the other end is connected to the central disc. The plurality of blades are eccentrically arranged.

[0012] In a preferred embodiment, the offset ratio of the blade is 0.15 - 0.20, and the swirl angle is 20° - 30°.

[0013] In a preferred embodiment, the air extraction mechanism includes a foot pedal, a lever, a piston rod, a piston head and a connecting rod. The piston head is provided in the auxiliary channel. One end of the piston rod is connected to the piston rod, and the other end is connected to the connecting rod. The other end of the connecting rod is connected to the lever, and the lever is connected to the foot pedal.

[0014] In a preferred embodiment, the outlet section is inclined at 45°.

[0015] In a preferred embodiment, an automatic retractable door is provided at the end of the outlet section. The upper end of the automatic retractable door is hinged to the end of the outlet section, and a first magnet is provided at the lower part. A second magnet that attracts the first magnet is provided at the end of the outlet section.

[0016] In a preferred embodiment, the magnet spacing between the first magnet and the second magnet is 1.5 - 3 cm, and the magnetic force intensity ≥ 200 mT.

[0017] Compared with the prior art, the present invention provides a siphon drainage device for sewage pools. Its auxiliary channel is connected to the connecting section, providing a passage for air extraction and air pressure regulation. The air extraction mechanism in the air extraction device extracts air inside the siphon through the auxiliary channel, and the one-way valve ensures the unidirectional flow of air. The two cooperate to create a negative pressure environment inside the siphon, triggering the siphon effect, thereby promoting the self-flow discharge of sewage without relying on electric pumping. This fundamentally solves the problems of traditional pumping drainage relying on electricity and high maintenance costs. At the same time, it breaks through the technical bottleneck of gravity self-flow being restricted by the water level difference and achieves the zero-energy consumption goal of sewage discharge.

[0018] The bottom of the cavity of the one-way valve is connected to the auxiliary channel through a fixing nut, and an air core is arranged at the top. A baffle is connected below the air core, and a closed airbag is arranged at the opening of the baffle. When the air pressure inside the siphon is within the normal range, the baffle tightly blocks the air core, and the closed airbag fills the opening of the baffle to form a sealing structure, preventing pollutants from contaminating the air core through the baffle and ensuring the reliability of the long-term operation of the device. When the internal air pressure of the system exceeds the defined threshold (such as the initial stage of siphon start or the air pressure fluctuation caused by flow rate changes during operation), the air core automatically moves upward under the action of air pressure, driving the baffle to rise synchronously. At this time, on the one hand, the baffle forms a limit for the air core to prevent it from being completely flushed out of the cavity due to excessive air pressure and ensuring the structural integrity; on the other hand, as the baffle rises, the closed airbag is deformed and contracted under the extrusion of air pressure, and the opening of the baffle is released from the closed state, allowing gas to quickly pass through the opening and discharge from the cavity, thereby releasing the excessive air pressure inside the siphon and avoiding the interruption of siphon due to pressure imbalance. When the air pressure drops to the safe range, the air core automatically resets under its own gravity and the action of air flow, the baffle falls back to the initial position, and the closed airbag expands again to block the opening, and the system returns to the sealed state to maintain a stable siphon effect.

[0019] The synergistic effect of the above mechanical structure and natural forces endows the device with multiple technical advantages: First, through the design of triggering siphon by air extraction, the system can be started without manual intervention, significantly improving the automation level and reducing the operation cost compared with traditional manually triggered siphon devices; Second, the pressure self-adaptive adjustment mechanism of the one-way valve can automatically complete the exhaust and sealing switching according to the air pressure change in the siphon pipe, avoiding the use of complex electronic control devices, reducing both the equipment cost and the operation risk caused by electronic component failures, and enhancing the system stability; Third, the combined structure of the closed airbag and the baffle effectively isolates pollutants while realizing the air pressure adjustment function, solves the technical problem of easy blockage of the gas passage by impurities in the traditional siphon system, and extends the equipment maintenance cycle; Fourth, the entire drainage process only relies on the physical action of the siphon effect and the mechanical structure, without continuous energy consumption, conforms to the concept of environmental protection, and can operate adaptively under various water level conditions, broadening the application scenarios, especially suitable for sewage treatment scenarios in remote areas, with unstable power supply or complex terrain.

[0020] In summary, through the ingenious mechanical structure design and the air pressure dynamic adjustment mechanism, the device has successfully overcome the bottlenecks of traditional drainage technologies in terms of energy consumption, automation, reliability, and environmental adaptability, achieving the goals of high efficiency, stability, and low energy consumption in sewage discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a siphon drainage device for a sewage tank according to the present invention.

[0022] Figure 2 is a schematic structural diagram of the air extraction mechanism and the one-way valve of a siphon drainage device for a sewage tank according to the present invention.

[0023] Figure 3 is a schematic structural diagram of the swirl anti-blocking device of a siphon drainage device for a sewage tank according to the present invention.

[0024] Figure 4 is a schematic structural diagram of the automatic retractable door of a siphon drainage device for a sewage tank according to the present invention.

[0025] Figure 5 is a schematic structural diagram of the one-way valve of a siphon drainage device for a sewage tank according to the present invention.

[0026] Figure 6 is a schematic structural diagram of a baffle of a siphon drainage device for a sewage tank according to the present invention.

[0027] In the figure

[0028] Fixed support 1; main channel 2; water inlet section 3; connecting section 4; water outlet section 5; auxiliary channel 6; swirl anti-clogging device 7; blade 8; central disc 9; foot pedal 10; lever 11; piston rod 12; piston head 13; connecting rod 14; automatic retractable door 15; first magnet 16; second magnet 17; one-way valve 18; cavity 19; fixing nut 20; air core 21; baffle 22; opening 23; closed airbag 24. Detailed implementation mode

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] This specific embodiment is only an interpretation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0031] As Figures 1 to 6 shown, a sewage sump siphon drainage device includes a special-shaped U-shaped siphon, a fixed support 1 and an air extraction device. The special-shaped U-shaped siphon includes a main channel 2 and an auxiliary channel 6. The main channel 2 includes a water inlet section 3, a connecting section 4 and a water outlet section 5 that are connected to each other. The connecting section 4 connects the water inlet section 3 and the water outlet section 5. The water inlet section 3 is fixed to the inner wall of the sewage sump by the fixed support 1. The auxiliary channel 6 is connected to the connecting section 4. The air extraction device includes an air extraction mechanism and a one-way valve 18. The air extraction mechanism is connected to the auxiliary channel 6 and is used to extract air from the auxiliary channel 6. The one-way valve 18 is also connected to the auxiliary channel 6 and is used to make the auxiliary channel 6 conduct unidirectionally. The one-way valve 18 includes a cavity 19, a baffle 22, a fixing nut 20 and an air core 21. The fixing nut 20 is provided at the bottom of the cavity 19 and is used to connect the auxiliary channel 6 and the cavity 19. The air core 21 is provided at the top of the cavity 19. The baffle 22 is connected below the air core 21. An opening 23 is provided on the baffle 22, and a closed airbag 24 is provided in the opening 23.

[0032] The present invention provides a sewage sump siphon drainage device. Its main channel 2 is responsible for large-flow discharge, and the auxiliary channel is used to maintain the continuity of the siphon and avoid interruption caused by sewage impurities. Its auxiliary channel 6 is communicated with the connecting section 4 to provide a path for air extraction and air pressure adjustment. The air extraction mechanism in the air extraction device extracts air inside the siphon through the auxiliary channel 6, and the one-way valve 18 ensures the unidirectional flow of air. The two cooperate to form a negative pressure environment inside the siphon, trigger the siphon effect, and thus promote the self-flow discharge of sewage without relying on electric pumping, fundamentally solving the problems of traditional pumping drainage relying on electricity and high maintenance costs. At the same time, it breaks through the technical bottleneck of gravity self-flow being limited by the water level difference and realizes the zero-energy consumption goal of sewage discharge.

[0033] The bottom of the cavity 19 of the one-way valve 18 is connected to the auxiliary channel 6 through a fixing nut 20, and an air core 21 is arranged at the top. A baffle 22 is connected below the air core 21, and a closed airbag 24 is arranged at the opening 23 of the baffle 22. When the air pressure in the siphon tube is within the normal range, the baffle 22 tightly blocks the air core 21, and the closed airbag 24 fills the opening 23 of the baffle 22 to form a sealing structure, preventing pollutants from contaminating the air core 21 through the baffle 22, so that the air core 21 is contaminated or blocked by impurities, ensuring the reliability of the long-term operation of the device. When the internal air pressure of the system exceeds the defined threshold (such as the initial stage of siphon start or the air pressure fluctuation caused by the flow rate change during operation), the air core 21 automatically moves upward under the action of air pressure, driving the baffle 22 to rise synchronously. At this time, on the one hand, the baffle 22 forms a limit for the air core 21 to prevent it from being completely washed out of the cavity 19 due to excessive air pressure, ensuring the structural integrity; on the other hand, as the baffle 22 rises, the closed airbag 24 deforms and shrinks under the extrusion of air pressure, and the opening 23 of the baffle 22 is released from the closed state, allowing gas to quickly pass through the opening 23 and discharge from the cavity 19, thereby releasing the excessive air pressure in the siphon tube and avoiding the interruption of siphon caused by pressure imbalance. When the air pressure drops to the safe range, the air core 21 automatically resets under its own gravity and the action of air flow, the baffle 22 falls back to the initial position, the closed airbag 24 expands again to block the opening 23, and the system returns to the sealed state, maintaining a stable siphon effect.

[0034] The synergistic effect of the above mechanical structure and natural force endows the device with multiple technical advantages: First, through the design of triggering siphon by air extraction, the system can be started without manual intervention. Compared with the traditional manually triggered siphon device, the automation level is significantly improved and the operation cost is reduced; Second, the pressure self-adaptive adjustment mechanism of the one-way valve 18 can automatically complete the switching between exhaust and sealing according to the air pressure change in the siphon tube, avoiding the use of complex electronic control devices, reducing both the equipment cost and the operation risk caused by electronic component failures, and enhancing the system stability; Third, the combined structure of the closed airbag 24 and the baffle 22 effectively isolates pollutants while realizing the air pressure regulation function, solves the technical problem that the gas passage in the traditional siphon system is easily blocked by impurities, and extends the equipment maintenance cycle; Fourth, the entire drainage process only depends on the physical action of the siphon effect and the mechanical structure, without continuous energy consumption, conforming to the concept of green environmental protection, and can operate adaptively under various water level conditions, broadening the application scenarios, especially suitable for sewage treatment scenarios in remote areas, unstable power supply or complex terrain.

[0035] In summary, through the delicate mechanical structure design and air pressure dynamic adjustment mechanism, the device has successfully overcome the bottlenecks of traditional drainage technology in terms of energy consumption, automation, reliability and environmental adaptability, and achieved the goals of high efficiency, stability and low energy consumption of sewage discharge.

[0036] Furthermore, the closed airbag 24 is made of rubber material, which endows the closed airbag 24 with good elasticity, thus having good deformation performance. The closed airbag 24 and the opening 23 can be connected through two connection points.

[0037] The closed airbag 24 can be arranged in various forms. For example, one closed airbag 24 is arranged in one opening 23, and the closed airbag 24 completely blocks the opening 23 under normal circumstances and creates space for air flow when it shrinks. There is also another arrangement method. A plurality of the closed airbags 24 are arranged in the opening 23, and the plurality of closed airbags 24 are mixed to form a community. Such an arrangement cannot completely close the opening 23. That is to say, it does not have a state of completely closing the opening 23. When the air pressure value is below the limit value, through the shielding of the plurality of closed airbags 24, pollutants cannot contact the air core 21. When the air pressure value is higher than the limit value, the volume of the closed airbag 24 shrinks, providing more air flow space. However, since there are multiple airbags at this time, a good shielding effect can still be provided, which is equivalent to playing the role of a filter.

[0038] To achieve smooth air flow, a plurality of the openings 23 are provided, and the plurality of the openings 23 are evenly arranged.

[0039] To achieve anti-blocking setting, a swirl anti-blocking device 7 is provided at the end of the water inlet section 3. The swirl anti-blocking device 7 includes a plurality of blades 8 and a central disc 9. One end of the blade 8 is connected to the inner wall of the water inlet section 3, and the other end is connected to the central disc 9. The plurality of blades 8 are eccentrically arranged. By adopting an asymmetric design, the stability of the drained water flow can be improved, blockage can be prevented, and the drainage efficiency can be increased.

[0040] In this embodiment, the offset ratio of the blade 8 is 0.15 - 0.20, preferably set to 0.17, and the swirl angle is 20° - 30°, preferably set to 25°.

[0041] Further, the air extraction mechanism includes a foot pedal 10, a lever 11, a piston rod 12, a piston head 13, and a connecting rod 14. The piston head 13 is disposed in the auxiliary channel 6. One end of the piston rod 12 is connected to the piston rod 12, and the other end is connected to the connecting rod 14. The other end of the connecting rod 14 is connected to the lever 11, and the lever 11 is connected to the foot pedal 10. By pressing the foot pedal 10 to drive the lever 11, the piston head 13 is driven to move. The connecting rod 14 is hinged to the piston rod 12, driving the piston head 13 to reciprocate in the auxiliary channel. When the piston head 13 moves upward, the one-way valve 18 opens, exhausting the air in the main channel 2 pipeline. When the piston head 13 returns, the one-way valve 18 closes to prevent air from flowing back. By operating in a cycle, a negative pressure state in the pipeline is quickly established and maintained, and the water body is sucked into the pipeline and discharged by using atmospheric pressure.

[0042] For the convenience of drainage, the water outlet section 5 is inclined at 45°.

[0043] Further, an automatic retractable door 15 is provided at the end of the water outlet section 5. The upper end of the automatic retractable door 15 is hinged to the end of the water outlet section 5, and a first magnet 16 is provided at the lower part. The end of the water outlet section 5 has a second magnet 17 that attracts the first magnet 16. The automatic retractable door is circular, with the same size as the water outlet section 5, and the top is connected above the pipeline. The retractable door is normally closed under the suction force generated between the first magnet 16 and the second magnet 17 to prevent foreign objects from entering the pipeline and causing blockage. When the water flow becomes larger, the retractable door opens by the impact of the beam flow and the gravity of the water to achieve drainage. When the water flow becomes smaller, the retractable door gradually closes under its own gravity. The opening degree of the automatic retractable door 15 is determined by the size of the water flow.

[0044] The magnetic stone spacing between the first magnet 16 and the second magnet 17 is 1.5 - 3 cm, and the magnetic force intensity ≥ 200 mT.

[0045] The siphon drainage device for a sewage tank in this embodiment can reduce the buried depth of the pre-buried drain pipe, and at the same time can reduce the configuration of the water tank. It is not necessary to install a drain pump if not necessary.

[0046] In this embodiment, the material of the special-shaped U-shaped siphon: both the main channel 2 and the auxiliary channel are made of corrosion-resistant UPVC material with a wall thickness of 5 mm. The inner diameter of the main channel 2 is 200 mm, and the inner diameter of the auxiliary channel is 50 mm.

[0047] Structure: The main channel 2 and the auxiliary channel are connected by welding. The water outlet section 5 is inclined downward at 45°, and an air extraction interface is provided at the top of the auxiliary channel.

[0048] Installation: The water inlet end of the main channel 2 is fixed to the inner wall of the sewage tank through a stainless steel fixed bracket 1 (bolt M12), and the bracket spacing is 1 m to resist drainage vibration.

[0049] Air extraction mechanism: The length of lever 11 is 1.2 m. The pedal 10 is made of anti-slip rubber material and is connected to the piston rod 12 through a hinge. The piston rod 12 is made of 304 stainless steel with a stroke of 30 cm. The piston head 13 is equipped with a silicone rubber seal ring and fits tightly against the inner wall of the auxiliary channel. Each pedal step can expel approximately 0.5 L of air from the auxiliary channel.

[0050] Anti-blocking swirl device: Parameters of blade 8: The number of blades 8 is 6, distributed asymmetrically and staggeredly, with the central axis shifted 17% to the left, a swirl angle of 25°, and a thickness of 3 mm for blade 8. It is welded to the inner wall of the water inlet end of the main channel 2. Experiments show that the swirl device can increase the sewage flow rate by 20% and the impurity separation efficiency reaches 85%.

[0051] Check valve 18: The volume of the cavity 19 is 0.3 L. The diameter of the opening 23 of the baffle 22 is 8 mm. The air core 21 is made of polytetrafluoroethylene. The upward stroke of the air core 21 is 5 cm. When the air pressure in the cavity 19 reaches 0.1 MPa, the air core 21 automatically moves upward to exhaust air and automatically resets after exhausting.

[0052] Automatic retractable door 15: Magnetic control: The retractable door uses neodymium iron boron magnets (N35 grade), with an arc length of 2 cm and a thickness of 1 cm installed at the end of the pipeline and at the position corresponding to the retractable door. The door body is made of silicone rubber with a thickness of 2 mm. When the water flow velocity ≥ 0.5 m / s, the retractable door fully opens; when ≤ 0.2 m / s, the door body closes under the action of magnetic force and gravity.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitations, elements defined by the statement "including..." or "comprising..." do not exclude the existence of additional elements in the process, method, article or terminal device including the said elements. In addition, in this article, "greater than", "less than", "exceeding" etc. are understood not to include the present number; "above", "below", "within" etc. are understood to include the present number.

[0054] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the present invention. It is obvious that those skilled in the art can easily make various modifications to the embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention according to the disclosure of the present invention.

Claims

1. A siphon drainage device for sewage pool, characterized in that, It includes a special-shaped U-shaped siphon, a fixed bracket and an air extraction device. The special-shaped U-shaped siphon includes a main channel and an auxiliary channel. The main channel includes a water inlet section, a connecting section and a water outlet section which are connected to each other. The connecting section connects the water inlet section and the water outlet section. The water inlet section is fixed to the inner wall of the sewage tank by the fixed bracket. The auxiliary channel is connected to the connecting section. The air extraction device includes an air extraction mechanism and a one-way valve. The air extraction mechanism is connected to the auxiliary channel for extracting air from the auxiliary channel. The one-way valve is also connected to the auxiliary channel for making the auxiliary channel conduct unidirectionally. The one-way valve includes a cavity, a baffle, a fixing nut and an air core. The fixing nut is arranged at the bottom of the cavity for connecting the auxiliary channel and the cavity. The air core is arranged at the top of the cavity. The baffle is connected below the air core. An opening is provided on the baffle, and a closed airbag is arranged in the opening.

2. The siphon drainage device for sewage pool according to claim 1, characterized in that, The closed airbag is made of rubber material.

3. The siphon drainage device for sewage pool according to claim 1, characterized in that, A plurality of the closed airbags are arranged in the opening.

4. The siphon drainage device for sewage pool according to claim 1, characterized in that, A plurality of the openings are provided, and the plurality of openings are evenly arranged.

5. The siphon drainage device for sewage pool according to claim 1, characterized in that, A swirl anti-blocking device is arranged at the end of the water inlet section. The swirl anti-blocking device includes a plurality of blades and a central disc. One end of the blade is connected to the inner wall of the water inlet section, and the other end is connected to the central disc. The plurality of blades are eccentrically arranged.

6. The siphon drainage device for sewage pool according to claim 5, wherein, The offset ratio of the blade is 0.15 - 0.20, and the swirl angle is 20° - 30°.

7. The siphon drainage device for sewage pool according to claim 1, characterized in that, The air extraction mechanism includes a foot pedal, a lever, a piston rod, a piston head and a connecting rod. The piston head is arranged in the auxiliary channel. One end of the piston rod is connected to the piston rod, and the other end is connected to the connecting rod. The other end of the connecting rod is connected to the lever, and the lever is connected to the foot pedal.

8. The siphon drainage device for sewage pool according to claim 1, wherein, The water outlet section is arranged at an inclination of 45°.

9. The siphon drainage device for sewage pool according to claim 1, characterized in that, An automatic retractable door is arranged at the end of the water outlet section. The upper end of the automatic retractable door is hinged to the end of the water outlet section, and a first magnet is arranged at the lower part. A second magnet which attracts the first magnet is arranged at the end of the water outlet section.

10. The siphon drainage device for sewage pool according to claim 9, characterized in that, The magnetic stone distance between the first magnet and the second magnet is 1.5 - 3 cm, and the magnetic force intensity ≥ 200 mT.

Images