An apparatus for discharging sewage into the ocean

Abstract

The present invention discloses a sewage ocean disposal and discharge device, belonging to the technical field of sewage treatment devices. The device includes a main pipeline and a plurality of laterally connected discharge pipes, and the top of each discharge pipe is connected to a spray pipe through a riser pipe. A gate valve and a centrifugal pump are arranged in each discharge pipe. The controller integrates a flow velocity meter, an ultrasonic fish repelling transducer and an alarm. The controller dynamically adjusts the power of the centrifugal pump by real-time monitoring of the sea current velocity to achieve optimized discharge velocity to match the ocean current movement. When the water flow in a local sea area is abnormal, the system automatically closes the faulty discharge pipe and intelligently distributes the sewage to other normal pipe orifices for discharge, and cooperates with the ultrasonic fish repelling to form an acoustic protection barrier. The device enables the initial dilution degree of the sewage to be stably higher than 55, effectively blocks the instantaneous contact between fish and high-concentration pollutants, reduces the enrichment of pollutants in organisms, and has the properties of anti-backflow, anti-blockage and anti-corrosion, and is applicable to ecological safety discharge under the deep-sea high-pressure environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment devices, and in particular relates to a sewage ocean disposal and discharge device. Background Art

[0002] With the development of coastal cities, marine disposal of sewage has become an important means to alleviate the pressure of land pollution, and many marine sewage discharge devices have emerged. For example, CN218374281U is a deep-sea discharge diffuser that can effectively discharge sewage. However, traditional discharge devices mostly adopt a single-tube diffusion mode with a fixed flow rate, which has significant technical defects: under complex ocean current conditions, the discharge port is susceptible to the impact of seawater backflow, causing pipeline blockage, and it is impossible to dynamically adjust the discharge parameters according to hydrodynamic conditions. Insufficient dilution in local areas often causes pollutant enrichment. Studies have shown that under traditional discharge methods, the initial dilution of sewage fluctuates by 40%-120%. In some cases, plumes have risen to the surface of the ocean, causing acute fish poisoning. In addition, persistent pollutants accumulate in organisms, significantly exacerbating ecological risks.

[0003] In the existing technology, mechanical check valves are prone to sealing failure under the condition of alternating two-way pressure of seawater. Statistics show that the leakage rate of conventional gate valves is as high as 17% when the reverse flow is 6m / s. In terms of biological protection, passive grid barrier devices not only cause 28%-35% head loss, but also have the risk of secondary release of pollutants during maintenance.

[0004] The Pollution Control Standard for Marine Wastewater Disposal Projects (GB 18486-2001) requires that the initial dilution of discharge in most sea areas be ≥35, which puts higher requirements on the fluid dynamics design and intelligent control of the discharge system. The active fish-driving technology developed in recent years mostly relies on visible light or bubble curtains, and its efficiency in turbid seawater is less than 42%. Therefore, it is urgent to develop a deep-sea discharge device with multifunctional integration such as sea current adaptation, anti-backflow enhanced sealing, and intelligent biological protection to achieve coordinated control of the pollutant diffusion process and marine ecological protection. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligently regulated sewage marine disposal discharge device, which optimizes sewage diffusion effects by dynamically regulating discharge parameters, preventing seawater backflow and actively driving away fish schools, thereby effectively reducing the short-term impact and long-term cumulative impact of pollutants on the marine ecosystem.

[0006] A sewage ocean disposal discharge device includes a main pipeline, a discharge pipe connected to the side of the main pipeline, a riser connected to the top of the discharge pipe, a nozzle connected to the side of the riser, a gate valve in each discharge pipe, a gradually expanding channel in the gate valve near the riser, a centrifugal pump in the discharge pipe on the side of the gate valve near the main pipeline, a motor of the centrifugal pump connected to a controller, and a flow meter, an ultrasonic fish-repelling transducer and an alarm built into the controller. This device optimizes the sewage discharge power configuration and biological protection mechanism, while achieving sewage stratification and diffusion, and constructs a fish contact barrier system. By combining active expulsion with physical isolation, instantaneous contact between fish and high-concentration pollutants is blocked to avoid acute poisoning. A dynamically regulated dilution discharge mode is adopted to reduce the continuous exposure concentration of pollutants in the water body, reduce the bioaccumulation effect of pollutants in fish, and inhibit chronic toxicological damage.

[0007] After pre-treatment, sewage flows into the main pipeline. The centrifugal pump continuously pumps water out of the main pipeline. Under the action of the centrifugal pump, the water flows into each discharge pipe, and then flows out from the nozzle of the riser to diffuse the sewage. Under normal working conditions, the centrifugal pump ensures that the flow rate is always higher than the critical suspension velocity of sediment to prevent particle sedimentation. The riser lifts the sewage from the bottom pipe or vertically to the preset discharge height to promote diffusion by natural water flow, and adjusts the height according to the stratification of the water body so that the sewage enters the optimal dilution layer. The nozzle is a multi-hole array (6 to 8 small-aperture nozzles distributed along the center line to the outer circumference), which increases local shear force by diverting flow and reduces the risk of single-hole blockage. The gate valve only allows sewage to flow from the main pipeline into the discharge pipe, and its structure can effectively prevent seawater backflow.

[0008] The entire device is placed in the ocean, and controllers are installed on each discharge pipe. The controller has a safe discharge flow rate value for the ocean water flow. The water flow rate in the ocean will change continuously. When the water flow rate is too high, part of the seawater may flow back into the nozzle and riser. When the flow meter in the controller detects that the water flow rate around the corresponding pipeline is too high, it will first increase the pumping speed of the centrifugal pump in the corresponding pipeline. If the water flow rate is detected to be too high, the seawater backflow speed is much higher than the maximum pumping speed of the centrifugal pump in the corresponding discharge pipe. At this time, the gradual expansion channel and gate valve will work to effectively prevent seawater from backflowing into the main pipeline. In another case, when the flow meter in the controller detects that the water flow rate around the corresponding pipeline is too low, the sewage discharged from the corresponding pipeline may have the risk of sewage enrichment, and it is necessary to reduce the pumping power of the centrifugal pump in the discharge pipe.

[0009] The gradually expanding channel can reduce the turbulence effect of high-speed fluid, and the included angle α of the gradually expanding channel is between 40° and 50°. The gradually expanding channel plays a certain buffering role in preventing seawater backflow from impacting the surface of the gate valve. The combined structure of a stepped gradually expanding channel and an adjustable nozzle is adopted, and the intelligent power adjustment of the centrifugal pump is coordinated to optimize the discharge flow rate to match the ocean current movement. When the ambient flow rate fluctuates, the controller compensates the pumping pressure in real time, so that the initial dilution degree of the sewage is stably maintained above 55, ensuring that the discharge plume completes the primary mixing with seawater in a short time, and the peak concentration of pollutants is always lower than 0.05 of the 96-hour median lethal concentration (LC50) of fish.

[0010] The controllers corresponding to each discharge pipe are controlled by the same control system. If the gate valve in the corresponding pipe is closed to prevent seawater backflow, the centrifugal pump of the corresponding discharge pipe is closed at this time, and the corresponding discharge pipe stops discharging water. It is necessary to wait until the external seawater flow rate decreases to the safe discharge flow rate value before restarting the centrifugal pump. If the controllers of the remaining discharge pipes detect that the seawater flow rate at the corresponding discharge position is relatively small at this time, the pumping power of the centrifugal pump in the corresponding discharge pipe can be increased to pump the water in the main pipe to the discharge pipe position with relatively good diffusion conditions for sewage diffusion, preventing sewage from accumulating in the main pipe.

[0011] Through the multi-channel shunt design and the gate valve interlock mechanism, a spatio-temporal distribution regulation system for pollutants is established. When adverse diffusion conditions occur in a local sea area (the seawater flow rate is too small to be conducive to discharge and there is a risk of seawater backflow), the control system automatically directs the sewage to the discharge pipes suitable for diffusion, avoiding the formation of pollution enrichment areas in local areas and significantly weakening the amplification effect of pollutants in the marine food chain.

[0012] The ultrasonic fish repellent transducer built in the controller is used to disperse the surrounding fish schools, preventing fish from entering the sewage discharge area through a non-physical contact method and reducing the harm of pollutants to aquatic organisms. Through the synergistic effect of the ultrasonic fish repellent transducer and the device dynamic adjustment system, an acoustic protection barrier is formed around the discharge port. When detecting the approach of fish schools, the fish repellent transducer emits ultrasonic waves with a specific frequency to force the fish to actively avoid, eliminating the acute contact risk from the behavioral level.

[0013] A sewage ocean disposal and discharge device. The gate valve includes a valve flap and a circular pipe. The valve flap and the circular pipe are rotatably connected through a flexible hinge. In the working state, sewage flows from the main pipeline into the circular pipe, and the water flow impacts the side of the valve flap close to the main pipeline to open the valve flap and flow into the riser pipe. The flexible hinge is made of a material softer than the valve flap, and allows the valve flap to swing freely under the change of fluid pressure through elastic deformation. When the water pressure in the main pipeline is greater than the water pressure in the discharge pipe, the pressure pushes the valve flap to rotate around the hinge towards the riser pipe side, opening the flow channel. When the water pressure difference in the drainage section of the bottom of the riser pipe is greater than the water pressure in the main pipeline, the hinge rebounds to drive the valve flap to reset, and fits against the bottom of the groove to form a seal to prevent the water pressure in the discharge pipe from flowing back into the main pipeline. The leakage rate of the gate valve is <5% under a reverse flow of 6 m / s, which is significantly better than the 17% leakage level of traditional mechanical valves.

[0014] A sewage ocean disposal and discharge device. The main body of the valve flap is an elliptical disc structure, and the circumferential edge of the elliptical disc structure has a semi-circular arc bottom plate that bends outward. The circular pipe consists of a circular pipe main body and a semi-circular arc track. The semi-circular arc track extends along the axial direction of the circular pipe main body, and the inner arc surface of the semi-circular arc track can fit against the outer arc surface of the semi-circular arc bottom plate. The side of the pipeline where the semi-circular arc bottom plate of the valve flap is located is called the downstream, and the side of the valve flap close to the main pipeline is called the upstream. When the downstream pressure is greater than the upstream pressure (when seawater backflows), under the action of the downstream pressure, the semi-circular arc bottom plate will tightly fit against the semi-circular arc track to form a sealing structure to prevent seawater in the downstream from flowing into the main pipeline.

[0015] A sewage ocean disposal and discharge device. The materials of the valve flap and the circular pipe are titanium alloy. Titanium alloy can effectively resist the corrosion of chloride ions in seawater, especially has extremely strong resistance to pitting corrosion and crevice corrosion. At the same time, it remains stable in sewage containing sulfides, acidic or alkaline substances, avoiding structural failure caused by chemical corrosion. The strength of titanium alloy is close to that of high-strength steel, but the density is only about 60% of that of steel, which is convenient for constructing lightweight structures in deep-sea high-pressure environments, reducing the difficulty of transportation and installation, and can maintain the structural integrity for a long time in deep-sea high-pressure environments, reducing the risk of deformation.

[0016] A sewage ocean disposal and discharge device. The surface of the elliptical disc structure close to the main pipeline is provided with corrugated grooves. The corrugated groove structure forms eddies by guiding the water flow, reduces the laminar boundary layer, reduces the flow resistance, and improves the sewage discharge speed. The concave-convex surface of the corrugations can accelerate local turbulence, scour sediments, reduce the risk of sludge deposition and blockage in sewage, and disperse external pressures such as deep-sea high pressure or mechanical loads through geometric shapes, significantly improving the compressive capacity. The number of corrugated grooves is at least 6.

[0017] A sewage ocean disposal and discharge device. The end of the discharge pipe is provided with an arc-shaped reflux surface. After the sewage enters the discharge pipe from the main pipeline, it impacts the end of the discharge pipe, and the arc-shaped reflux surface can make the sewage reflux and finally guide it to the riser pipe for discharge.

[0018] A sewage ocean disposal and discharge device has a pressure sensor embedded inside the valve flap, and the pressure sensor can be electrically connected to a controller. The pressure sensor is used to detect the magnitude of the pressure exerted on the surface of the valve flap when seawater backflows downstream. When it is found that the detected pressure value is too large, the alarm in the controller can give an alarm, and maintenance personnel can come for inspection and repair. When the detected pressure value drops to the safe range, the centrifugal pump can be restarted for sewage discharge.

[0019] The advantages of the present invention are as follows: By real-time monitoring with a current meter and dynamic adjustment of the centrifugal pump power, it ensures that the initial dilution degree of sewage is stable ≥ 55 and the discharge flow rate continuously remains higher than the critical suspension velocity of sediment; combined with the design of fluid optimization in the gradually expanding channel, sealing of the titanium alloy flexible gate valve, and turbulent erosion in the corrugated groove, and cooperating with the early warning of the pressure sensor to achieve smooth discharge of the pipeline. The leakage rate is < 5% under a 6m / s reverse flow, significantly better than the 17% leakage level of traditional mechanical valves; at the same time, the ultrasonic fish repelling transducer and the multi-channel redundant shunt design work together, and the titanium alloy valve body and corrugated groove structure further achieve a 40% weight reduction, comprehensively improving the ecological safety of sewage ocean disposal from aspects such as diffusion control, biological protection to material performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0021] Figure 1 It is a schematic external view of the overall device of the present invention.

[0022] Figure 2 It is a schematic internal view of the discharge pipe of the present invention.

[0023] Figure 3 It is a schematic view of the gate valve of the present invention.

[0024] Figure 4 It is a schematic view of the fitting of the circular pipe structure and the gate valve of the present invention.

[0025] Figure 5 It is a schematic view of the valve flap of the present invention.

[0026] Figure 6 It is a schematic view of the corrugated surface of the valve flap of the present invention.

[0027] Figure 7 It is a schematic view of Embodiment 1 of the present invention.

[0028] Description of the drawings: 11 - main pipeline, 12 - discharge pipe, 13 - riser pipe, 14 - nozzle, 3 - gate valve, 4 - controller, 5 - centrifugal pump, 31 - flexible hinge, 32 - valve flap, 33 - circular pipe, 121 - arc reflux surface, 122 - gradually expanding channel, 321 - corrugated groove, 322 - semi-circular bottom plate, 323 - elliptical disc structure, 331 - circular pipe body, 332 - semi-circular track, 12a - first discharge pipe, 12b - second discharge pipe, 12c - third discharge pipe, 12d - fourth discharge pipe, 12e - fifth discharge pipe. Detailed implementation manners

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] Referring to the attached Figure 1 and the attached Figure 2 As shown, a sewage ocean disposal and discharge device includes a main pipeline 11. A discharge pipe 12 is connected to the side of the main pipeline 11. A riser pipe 13 is connected to the top of the discharge pipe 12. A nozzle 14 is connected to the side of the riser pipe 13. A gate valve 3 is provided in each discharge pipe 12. A gradually expanding channel 122 is provided on the side of the gate valve 3 close to the riser pipe 13. A centrifugal pump 5 is placed in the discharge pipe 12 on the side of the gate valve 3 close to the main pipeline 11. The motor of the centrifugal pump 5 is connected to the controller 4. The controller 4 is internally provided with a flow meter, an ultrasonic fish repelling transducer, and an alarm. This device optimizes the sewage discharge power configuration and biological protection mechanism, realizes the stratified diffusion of sewage while constructing a fish contact barrier system. By combining active repelling and physical isolation, it blocks the instantaneous contact between fish and high-concentration pollutants, avoids acute poisoning, adopts a dynamically regulated dilution discharge mode, reduces the continuous exposure concentration of pollutants in the water body, reduces the bioaccumulation effect of pollutants in fish bodies, and inhibits chronic toxicological damage.

[0032] Referring to the attached Figure 1 and the attached Figure 2As shown, the sewage flows into the main pipeline 11 after pretreatment. The centrifugal pump 5 continuously pumps water from the main pipeline 11. Under the action of the centrifugal pump 5, the water flows into each discharge pipe 12, and then flows out from the nozzle 14 of the riser pipe 13 for sewage diffusion. The riser pipe 13 lifts the sewage from the bottom pipeline or vertically to the preset discharge height to utilize the natural water flow to promote diffusion, adjusts the height according to the water body stratification, and enables the sewage to enter the optimal dilution layer. The nozzle 14 is a porous array (6 to 8 small-aperture nozzles distributed outward in a circumferential direction along the center line), which increases the local shear force through flow splitting and reduces the risk of single-hole blockage at the same time. The gate valve 3 only allows the sewage to flow from the main pipeline 11 into the discharge pipe 12, and its structure can effectively prevent seawater backflow.

[0033] Refer to the attached Figure 1 , attached Figure 2 , attached Figure 3 As shown, the entire device is placed in the ocean, and a controller 4 is installed on each discharge pipe 12. The controller 4 sets the safe discharge flow velocity value of the ocean current, and the water flow velocity in the ocean will change continuously. When the water flow velocity is too large, some seawater may flow back and pour into the nozzle 14 and the riser pipe 13. When the flow velocity meter in the controller 4 detects that the water flow velocity around the corresponding pipeline is too large, it will first increase the pumping speed of the centrifugal pump 5 in the corresponding pipeline. If it detects that the water flow velocity is too large and the seawater backflow speed is much greater than the maximum pumping speed of the centrifugal pump 5 in the corresponding discharge pipe 12, at this time, the gradually expanding channel 122 and the gate valve 3 come into play and can effectively prevent seawater from flowing back into the main pipeline 11. In another case, when the flow velocity meter in the controller 4 detects that the water flow velocity around the corresponding pipeline is too small, there may be a risk of sewage enrichment in the sewage discharge of the corresponding pipeline, and it is necessary to reduce the pumping power of the centrifugal pump 5 in the discharge pipe 12 where it is located.

[0034] Refer to the attached Figure 2 As shown, the gradually expanding channel 122 can reduce the turbulence effect of high-speed fluid, and the included angle α of the gradually expanding channel 122 is between 40° and 50°. The gradually expanding channel 122 plays a certain buffering role in the impact of seawater backflow on the surface of the gate valve 3. The combined structure of the hierarchical gradually expanding channel 122 and the adjustable nozzle 14 is adopted, and combined with the intelligent power adjustment of the centrifugal pump 5, the dynamic matching of the discharge flow velocity and the ocean turbulence is realized. When the ambient flow velocity fluctuates, the controller 4 compensates the pumping pressure in real time, and according to the "Pollution Control Standards for Sewage Ocean Disposal Projects (GB 18486 - 2001)", the initial dilution degree of the sewage is stably maintained above 55, ensuring that the discharge plume completes the primary mixing with seawater in a short time and making the peak concentration of pollutants always lower than 1 / 5 of the 96-hour half-lethal concentration (LC50) of fish.

[0035] Refer to the attached Figure 1 , attached Figure 2As shown, the corresponding controller 4 on each discharge pipe 12 is controlled by the same control system. If the gate valve 3 in the corresponding pipeline is closed to prevent seawater backflow, the centrifugal pump 5 of the corresponding discharge pipe 12 is closed at this time, and the corresponding discharge pipe 12 is no longer drained. It is necessary to wait until the external seawater flow velocity decreases to the safe discharge flow rate value before re-opening the centrifugal pump 5. If the controller 4 of the remaining discharge pipes 12 detects that the seawater flow velocity at the discharge position is relatively small at this time, the pumping power of the centrifugal pump 5 in the corresponding discharge pipe 12 can be increased to extract the water of the main pipeline 11 to the position of the discharge pipe 12 with relatively good diffusion conditions for sewage diffusion, so as to prevent sewage from accumulating in the main pipeline 11. Through the multi-channel diversion design and the interlocking mechanism of the gate valve 3, a control system for the spatiotemporal distribution of pollutants is established. When unfavorable diffusion conditions occur in the local sea area (the seawater flow velocity is too small to be conducive to discharge, and there is a risk of seawater backflow), the control system automatically directs the sewage to the discharge pipe 12 suitable for diffusion, avoiding the formation of pollution enrichment areas in the local area, and significantly weakening the amplification effect of pollutants in the marine food chain.

[0036] For further information, see Attachment Figure 7 As shown, the discharge pipes 12 from left to right are the first discharge pipe 12a, the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e. If the first discharge pipe 12a detects that the seawater flow is too large at its location, seawater will flow back into the first discharge pipe 12a. At this time, the gate valve 3 and the centrifugal pump 5 in the first discharge pipe 12a are in a closed state. If it is detected at the fifth discharge pipe 12e that the relative seawater flow speed is small, the pumping power of the centrifugal pump 5 of the fifth discharge pipe 12e can be increased to prevent sewage accumulation in the main pipeline 11 due to the first discharge pipe 12a not being in a working state. Similarly, when the second discharge pipe 12b detects that the seawater flow is too large and causes seawater backflow, if the controller 4 in any of the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e detects that the water flow rate is low, the discharge power of the centrifugal pump 5 in the corresponding pipe can be increased, and the sewage discharge in the main pipe 11 can be dynamically adjusted by the controller 4, effectively ensuring the smooth discharge of sewage in the main pipe 11, and preventing sewage from being blocked in the main pipe 11 due to seawater backflow in individual discharge pipes 12. The ultrasonic fish-repelling transducer built into the controller 4 disperses the surrounding fish, prevents fish from entering the sewage discharge area by non-physical contact, and reduces the harm of pollutants to aquatic organisms.

[0037] Optional, see attached Figure 7As shown, the discharge pipes 12 from left to right are the first discharge pipe 12a, the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e in sequence. If the water flow in the position where the first discharge pipe 12a is located is too small or even lower than the safe discharge flow rate value, there may be a risk that the sewage may not be fully diffused when the centrifugal pump 5 operates at the original power. The controller 4 can reduce the pumping speed of the centrifugal pump 5 of the first discharge pipe 12a, slow down the sewage discharge speed in the area corresponding to the first discharge pipe 12a, and effectively prevent the risk brought by the pollution enrichment area to marine organisms. At this time, if the water flow in any of the pipes of the second discharge pipe 12b, the third discharge pipe 12c, the fourth discharge pipe 12d, and the fifth discharge pipe 12e is at the safe discharge flow rate value, the discharge power of the centrifugal pump 5 in the corresponding pipe can be appropriately increased to prevent the sewage in the main pipe 11 from being blocked.

[0038] Refer to the appendix Figure 1 As shown, the ultrasonic fish repelling transducer built in the controller 4 is used to disperse the surrounding fish schools, prevent fish from entering the sewage discharge area through a non-physical contact method, and reduce the harm of pollutants to aquatic organisms. Through the synergistic effect of the ultrasonic fish repelling transducer and the device dynamic adjustment system, an acoustic protection barrier is formed around the discharge port. When it is detected that the fish school is approaching, the fish repelling transducer emits ultrasonic waves with a specific frequency to force the fish to actively avoid, eliminating the acute contact risk at the behavioral level.

[0039] Refer to the appendix Figure 1 and the appendix Figure 2 As shown, for a sewage ocean disposal and discharge device, the gate valve 3 includes a valve flap 32 and a round pipe 33, and the valve flap and the round pipe 33 are rotatably connected through a flexible hinge 31. In the working state, sewage flows from the main pipe 11 into the round pipe 33, and the water flow impacts the side of the valve flap 32 close to the main pipe 11 to open the valve flap 32 and flow into the riser pipe 13. The flexible hinge 31 is made of a material softer than the valve flap 32, and allows the valve flap 32 to swing freely when the fluid pressure changes through elastic deformation. When the water pressure in the main pipe 11 is greater than the water pressure in the discharge pipe 12, the pressure pushes the valve flap 32 to rotate around the hinge towards the riser pipe 13 side to open the flow channel. When the water pressure difference in the drainage section of the discharge pipe 12 at the bottom of the riser pipe 13 is greater than the water pressure in the main pipe 11, the hinge rebounds to drive the valve flap 32 to reset and fit the bottom of the groove to form a seal to prevent the water pressure in the discharge pipe 12 from flowing back into the main pipe 11. The leakage rate of the gate valve 3 is <5% under a reverse flow of 6 m / s, which is significantly better than the 17% leakage level of traditional mechanical valves.

[0040] Refer to the appendix Figure 5 As shown, for a sewage ocean disposal and discharge device, the main body of the valve flap 32 is an elliptical disk structure 323, and the circumferential edge of the elliptical disk structure 323 has a semi-circular bottom plate 322 that bends outward.

[0041] Refer to the appendix Figure 4 and the appendixFigure 5 As shown in the figure, a sewage ocean disposal and discharge device, the circular pipe 33 is composed of a circular pipe main body 331 and a semi-circular arc track 332. The semi-circular arc track 332 extends axially along the circular pipe main body 331, and the inner arc surface of the semi-circular arc track 332 can be attached to the outer arc surface of the semi-circular arc bottom plate 322. The side of the pipe where the semi-circular arc bottom plate 322 of the valve flap 32 is located is called the downstream, and the side of the valve flap 32 close to the main pipe 11 is called the upstream. When the downstream pressure is greater than the upstream (during seawater backflow), under the action of the downstream pressure, the semi-circular arc bottom plate 322 will tightly fit the semi-circular arc track 332 to form a sealing structure to prevent seawater from flowing into the main pipe 11 downstream.

[0042] Refer to the appendix Figure 3 As shown in the figure, a sewage ocean disposal and discharge device, the valve flap 32 and the circular pipe 33 are made of titanium alloy. Titanium alloy can effectively resist the corrosion of chloride ions in seawater, especially has extremely strong resistance to pitting corrosion and crevice corrosion. At the same time, it remains stable in sewage containing sulfides, acidic or alkaline substances, avoiding structural failure caused by chemical corrosion. The strength of titanium alloy is close to that of high-strength steel, but the density is only about 60% of that of steel, which is convenient for constructing lightweight structures in the deep-sea high-pressure environment, reducing the difficulty of transportation and installation, and can maintain structural integrity for a long time in the deep-sea high-pressure environment, reducing the risk of deformation.

[0043] Refer to the appendix Figure 6 As shown in the figure, a sewage ocean disposal and discharge device, the surface of the elliptical disk structure 323 close to the main pipe 11 is provided with corrugated grooves 321. The corrugated groove 321 structure forms eddies by guiding the water flow, reduces the laminar boundary layer, reduces the flow resistance, and improves the sewage discharge speed. The concave-convex surface of the corrugation can accelerate local turbulence, scour sediments, reduce the risk of sludge deposition and blockage in sewage, and disperse external pressures such as deep-sea high pressure or mechanical loads through the geometric shape, significantly improving the compressive capacity. The number of corrugated grooves 321 is at least 6.

[0044] Refer to the appendix Figure 1 As shown in the figure, a sewage ocean disposal and discharge device, the end of the discharge pipe 12 is provided with an arc-shaped reflux surface 121. After the sewage enters the discharge pipe 12 from the main pipe 11, it impacts the end of the discharge pipe 12, and the arc-shaped reflux surface 121 can make the sewage reflux and finally guide it to the riser pipe 13 for discharge.

[0045] Refer to the appendix Figure 3 、 Figure 5 As shown in the figure, a sewage ocean disposal and discharge device, a pressure sensor is embedded inside the valve flap 32, and the pressure sensor can be electrically connected to the controller 4. The pressure sensor is used to detect the pressure applied to the surface of the valve flap 32 during seawater backflow downstream. When it is found that the detected pressure value is too large, the alarm in the controller 4 can give an alarm, and maintenance personnel can come to detect and repair. When the detected pressure value drops to the safe range, the centrifugal pump 5 can be restarted at this time for sewage discharge.

[0046] It should also be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] The above embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for implementing the technology of the present invention, and do not impose any formal restrictions on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, can make some modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

[0048] Specific examples are used in this article to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. The above is only the preferred implementation manner of the present application. It should be noted that due to the limitation of literal expression and objectively existing infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present application, several improvements, embellishments or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, embellishments, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present application.

Claims

1. A sewage ocean disposal discharge device, comprising a main pipeline (11), a discharge pipe (12) connected to the side of the main pipeline (11), a riser (13) connected to the top of the discharge pipe (12), and a nozzle (14) connected to the side of the riser (13), characterized in that: The discharge pipe (12) is provided with a gate valve (3), and a gradually expanding channel (122) is provided in the discharge pipe (12) on the side of the gate valve (3) close to the riser (13). A centrifugal pump (5) is placed in the discharge pipe (12) on the side of the gate valve (3) close to the main pipeline (11), and the motor of the centrifugal pump (5) is connected to a controller (4), and the controller (4) has a flow meter, an ultrasonic fish-repelling transducer and an alarm built in.

2. A sewage ocean disposal discharge device according to claim 1, characterized in that: The gate valve (3) comprises a valve flap (32) and a circular tube (33), wherein the valve flap (32) and the circular tube (33) are rotatably connected via a flexible hinge (31).

3. A sewage ocean disposal discharge device according to claim 2, characterized in that: The circular tube (33) is composed of a circular tube body (331) and a semicircular arc track (332); the semicircular arc track (332) extends axially along the central axis of the circular tube body (331); and the inner arc surface of the semicircular arc track (332) fits the outer arc surface of the semicircular arc bottom plate (322).

4. A sewage ocean disposal discharge device according to claim 2, characterized in that: The valve flap (32) and the round tube (33) are made of titanium alloy.

5. The sewage ocean disposal discharge device according to claim 2, characterized in that: A pressure sensor is embedded in the valve flap (32), and the pressure sensor is electrically connected to the controller (4).

6. A sewage ocean disposal and discharge device according to claim 2, characterized in that: The valve flap (32) has an elliptical disc structure (323) as its main body, and the elliptical disc structure (323) has a semicircular arc bottom plate (322) bent outward on its circumferential edge.

7. A sewage ocean disposal and discharge device according to claim 6, characterized in that: The surface of the elliptical disc structure (323) on one side close to the main pipe (11) is provided with a corrugated groove (321).

8. The sewage ocean disposal and discharge device according to claim 7, characterized in that: The number of the corrugated grooves (321) is at least 6.

9. The sewage ocean disposal discharge device according to claim 1, characterized in that: The end of the discharge pipe (12) is provided with a circular arc return surface (121).

10. The sewage ocean disposal discharge device according to claim 1, characterized in that: The included angle α of the gradually expanding channel (122) is between 40° and 50°.

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