Rain sewage solid-liquid separation device and separation method

Abstract

The invention discloses a rain sewage solid-liquid separation device and a separation method, and relates to the technical field of rain sewage solid-liquid separation, the rain sewage solid-liquid separation device comprises a flow discarding box, a water inlet pipe communicated with a self inner cavity is fixedly mounted on one side of the flow discarding box, and a water outlet pipe communicated with the self inner cavity is fixedly mounted on the other side of the flow discarding box; a filtering basket used for filtering impurities in rainwater is fixedly installed in an inner cavity of the flow discarding box, a plurality of intercepting nets used for intercepting the impurities in the rainwater are fixedly installed in an inner cavity of the water outlet pipe, a first floating ball is arranged in the inner cavity of the flow discarding box, a second floating ball is arranged at the bottom of the flow discarding box, and a cleaning piece is arranged in the flow discarding box. And the cleaning piece can wash impurities intercepted by the intercepting net by means of rainwater in the discarding box. Through cooperation of the cleaning piece, the situation that follow-up filtering of rainwater is affected due to the fact that the intercepting net is blocked by impurities can be avoided, the flow speed of the rainwater in the water outlet pipe is reduced, and the situation that the rainwater overflows from the top of the discarding box and pollutes the surrounding environment is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of rain and sewage solid-liquid separation, and specifically provides a rain and sewage solid-liquid separation device and a separation method. Background Art

[0002] Rainwater harvesting is an environmentally friendly and economical way of water resource utilization. By systematically collecting, storing, and treating rainwater, it can be used for non-potable water purposes such as irrigation, toilet flushing, and cleaning, and even can be used as drinking water after in-depth treatment.

[0003] Currently, in order to accelerate the construction of sponge cities in various regions, PP module rainwater collection ponds are generally set up in industrial parks, residential areas, and beside roads to store rainwater from roofs, roads, squares, etc. into the PP module ponds. However, before the rainwater enters the PP module ponds, it is necessary to remove impurities (such as stones, leaves, and garbage) from the rainwater, especially to exclude the early rainwater (the rainwater in the first 5 - 15 minutes contains more pollutants), so as to separate the collected rainwater and pollutants, and avoid the accumulation of too many impurities in the PP module ponds, which affects the normal collection and storage of rainwater.

[0004] In the prior art, a flow diversion device for filtering rainwater is provided before the rainwater converges and enters the PP module ponds. The flow diversion device is provided with a filter screen for multi-stage filtering of rainwater (the apertures of multiple filter screens are different, so as to separate different types and volumes of impurities from the rainwater). At the same time, a flow diversion hole for diverting the early rainwater is provided at the bottom of the flow diversion device (to prevent oil stains or other harmful substances on the ground or roof from entering the PP module ponds with the rainwater and polluting the PP module ponds). However, after intercepting different types and volumes of impurities through the multi-stage filter screen, the intercepted impurities will adhere to the outside of the filter screen with the backflow of the rainwater. When the rainwater stops flowing, the floating impurities will accumulate at the bottom of the inner cavity of the outlet pipe under the action of gravity. The long-term accumulation causes an increase in the number of impurities intercepted by the filter screen in the inner cavity of the outlet pipe. When the rainwater impacts the accumulated impurities again, the accumulated impurities will adhere to the outside of the filter screen again, easily causing the filter screen to be blocked, affecting the subsequent filtration of rainwater and reducing the flow rate of rainwater in the pipeline, and easily resulting in the overflow of rainwater in the flow diversion device, polluting the surrounding environment. Summary of the Invention

[0005] The purpose of the present invention is to provide a rain and sewage solid-liquid separation device and a separation method to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A rain and sewage solid-liquid separation device and a separation method, including; The flow diversion box is fixedly installed with a water inlet pipe communicating with its inner cavity on one side, and a water outlet pipe communicating with its inner cavity on the other side. A filter basket for filtering impurities in rainwater is fixedly installed in the inner cavity of the flow diversion box, and a plurality of intercepting nets for intercepting impurities in rainwater are fixedly installed in the inner cavity of the water outlet pipe. The flow diversion hole is opened at the bottom of the flow diversion box. A first floating ball is arranged in the inner cavity of the flow diversion box, and a second floating ball is arranged at the bottom of the flow diversion box. A connecting rod connecting the first floating ball and the second floating ball is fixedly installed on the outer wall of the first floating ball. A cleaning member is arranged inside the flow diversion box, and the cleaning member can wash the impurities intercepted by the intercepting net with the rainwater in the flow diversion box.

[0007] Preferably, the cleaning member includes a U-shaped pipe and a diversion pipe. Through holes communicating with its inner cavity are opened at the top and bottom of the water outlet pipe. One end of the U-shaped pipe is located in the inner cavity of the flow diversion box, and the other end of the U-shaped pipe penetrates through the two through holes and extends to directly below the water outlet pipe. The end of the U-shaped pipe located in the inner cavity of the flow diversion box is above the other end of itself. A diversion pipe is arranged in the inner cavity of the water outlet pipe. One end of the diversion pipe is fixedly connected to the outer wall of the U-shaped pipe. Installation holes adapted to the diversion pipe are opened at one ends of the plurality of intercepting nets. A plurality of flushing heads for flushing the impurities accumulated at the bottom of the inner cavity of the water outlet pipe are fixedly installed on the outer wall of the diversion pipe. An electromagnetic valve two is fixedly installed in the inner cavity of the U-shaped pipe. The electromagnetic valve two is located between the water outlet end of the U-shaped pipe and the water outlet pipe. An electromagnetic valve one for controlling the water flow is arranged in the inner cavity of the water outlet pipe.

[0008] Preferably, an electromagnetic valve three for controlling the water output of the plurality of flushing heads is fixedly installed in the inner cavity of the diversion pipe.

[0009] Preferably, the plurality of flushing heads and the plurality of intercepting nets are arranged alternately, and the water outlet ends of the plurality of flushing heads are inclined towards the direction close to the bottom of the water outlet pipe. Through holes adapted to the flushing heads are opened on the outer walls of the plurality of intercepting nets, and the water outlet ends of the flushing heads penetrate through the through holes and extend to the other end of the intercepting net.

[0010] Preferably, industrial cameras and supplementary lights for identifying impurities are fixedly installed on the inner wall of the water outlet pipe and in the inner cavity of the flow diversion box. The industrial camera and the supplementary light located in the inner cavity of the water outlet pipe are located between two of the intercepting nets.

[0011] Preferably, a fixing ring for supporting the bottom of the first floating ball is fixedly installed in the inner cavity of the flow diversion box. The fixing ring is located directly above the flow diversion hole, and a plurality of support columns connected to the bottom of the inner cavity of the flow diversion box are fixedly installed in a circular distribution at the bottom of the fixing ring.

[0012] Preferably, a liquid outlet pipe communicating with the flow diversion hole is fixedly installed at the bottom of the flow diversion box. The second floating ball is located in the inner cavity of the liquid outlet pipe. The volume of the second floating ball is smaller than that of the first floating ball. The end of the liquid outlet pipe away from the flow diversion box is fixedly installed with a flow diversion pipe communicating with its inner cavity.

[0013] Preferably, a support plate is fixedly installed in the inner cavity of the flow diversion box. A guide pipe is fixedly installed on the top of the support plate. A guide rod is slidably installed in the inner cavity of the guide pipe. One end of the guide rod extending to the outside is fixedly connected to the top of the first floating ball.

[0014] Preferably, a drain pipe is fixedly installed at the bottom of the inner cavity of the flow diversion box. One end of the drain pipe is fixedly connected to the outer wall of the liquid outlet pipe. And a hemispherical anti-blocking plate for preventing blockage is fixedly installed at the top of the drain pipe. A plurality of diversion grooves are annularly distributed on the outer wall of the hemispherical anti-blocking plate.

[0015] A rainwater and sewage solid-liquid separation method includes the following steps: Repeat the control of the opening and closing of the third solenoid valve and the second solenoid valve multiple times, so that water can generate a water hammer effect in the inner cavity of the U-shaped pipe for many times, in order to impact the impurities deposited at the bottom of the inner cavity of the water outlet pipe multiple times, so that the impurities on one side of the intercepting net can continuously enter the inside of the flow diversion box. As the amount of water in the flow diversion box decreases, part of the impurities are intercepted by the filter basket, and the rest are deposited at the bottom of the inner cavity of the flow diversion box, avoiding the intercepting net being blocked by impurities and affecting the subsequent filtration of rainwater and reducing the flow rate of rainwater inside the water outlet pipe, preventing rainwater from overflowing from the top of the flow diversion box and polluting the surrounding environment.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the cleaning member, the impurities intercepted by the intercepting net are washed, so that the impurities deposited at the bottom of the inner cavity of the water outlet pipe enter the inside of the flow diversion box, avoiding the intercepting net being blocked by impurities and affecting the subsequent filtration of rainwater and reducing the flow rate of rainwater inside the water outlet pipe, preventing rainwater from overflowing from the top of the flow diversion box and polluting the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present invention; Figure 2 is an assembly drawing of the flow diversion box and the flow diversion pipe of the present invention; Figure 3 is an assembly drawing of the filter basket and the first floating ball of the present invention; Figure 4 is an assembly drawing of the flow diversion box and the U-shaped pipe of the present invention; Figure 5 is the present invention Figure 4 the enlarged view of the structure at A in; Figure 6 is the present invention Figure 4 the enlarged view of the structure at B in.

[0018] In the figure: 1, water inlet pipe; 2, water outlet pipe; 3, sedimentation tank; 4, liquid discharge pipe; 5, sewage inlet pipe; 6, PP module pool; 7, sewage discharge pipe; 8, flow diversion pipe; 9, flow diversion box; 10, liquid outlet pipe; 11, U-shaped pipe; 12, filter basket; 13, solenoid valve 1; 14, hemispherical anti-blocking plate; 15, float 2; 16, float 1; 17, interception net; 18, diversion pipe; 19, scouring head; 20, guiding pipe; 21, guiding rod; 22, fixing ring; 23, support column; 24, drain pipe. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1 Please refer to Figures 1-6 , including: A flow diversion box 9, with a water inlet pipe 1 fixedly installed on one side and communicating with its inner cavity, and a water outlet pipe 2 fixedly installed on the other side and communicating with its inner cavity. Among them, the rainwater on the roof, ground or square is collected and concentrated into the inner cavity of the water inlet pipe 1, and then flows through the water inlet pipe 1 into the inner cavity of the flow diversion box 9. When the rainwater liquid level in the flow diversion box 9 is higher than the water inlet end of the water outlet pipe 2, the rainwater is discharged along the water outlet pipe 2 under the action of gravity.

[0021] The other end of the water outlet pipe 2 is fixedly installed with a sedimentation tank 3. The side of the sedimentation tank 3 away from the water outlet pipe 2 is fixedly installed with a liquid discharge pipe 4. The other end of the liquid discharge pipe 4 is fixedly installed with a sewage inlet pipe 5. The sewage inlet pipe 5 is connected to the PP module pool 6. At the same time, a sewage discharge pipe 7 is installed on the top of the PP module pool 6. The sewage discharge pipe 7 is connected to the purification tank through a pipeline. The rainwater collected in the inner cavity of the flow diversion box 9 enters the inner cavity of the sedimentation tank 3 through the water outlet pipe 2. When the rainwater liquid level in the inner cavity of the sedimentation tank 3 is higher than the liquid discharge pipe 4, the rainwater in the sedimentation tank 3 enters the inner cavity of the sewage inlet pipe 5 through the liquid discharge pipe 4, so as to gather the rainwater into the PP module pool 6 for storage. Then, a part of the rainwater in the PP module pool 6 is pumped into the purification tank through a pipeline by a water pump for purification treatment. The purified rainwater can be used for watering green plants or flushing roads, etc. (This is the prior art and will not be elaborated here).

[0022] According to the applicant's understanding of the prior art, the rainfall of the initial rainwater is small. At the same time, larger impurities on the ground (such as larger stones, leaves, and garbage) are collected with the initial rainwater and are washed into the inner cavity of the inlet pipe 1 by the initial rainwater. If the larger impurities on the ground accumulate at the bottom of the inner cavity of the runoff box 9, it will reduce the volume of the runoff box 9. And when the later rainwater collects in the inner cavity of the runoff box 9 and then enters the inner cavity of the outlet pipe 2 along with the rainwater, it is easy to cause the inner cavity of the outlet pipe 2 to be blocked, thus having an adverse impact on the collection of rainwater.

[0023] To solve the above technical problems, a filter basket 12 for filtering impurities in rainwater is fixedly installed in the inner cavity of the runoff box 9. The top of the filter basket 12 is located above the outlet pipe 2 and the inlet pipe 1, and the bottom is located below the outlet pipe 2 and the inlet pipe 1. At the same time, a through hole is provided on one side of the filter basket 12 close to the inlet pipe 1. The rainwater in the first 5 to 15 minutes of the initial rainwater flows into the inner cavity of the filter basket 12 through the inlet pipe 1 and the through hole. At this time, the larger impurities doped in the rainwater enter the inner cavity of the filter basket 12 and are intercepted by the filter basket 12 in its own inner cavity. The rainwater passes through the filter basket 12 and collects at the bottom of the inner cavity of the runoff box 9, thereby intercepting the larger impurities in the initial rainwater, preventing the larger impurities from accumulating at the bottom of the inner cavity of the runoff box 9 and reducing the volume of the runoff box 9, and at the same time avoiding the blockage of the outlet pipe 2 by the larger impurities, which is beneficial for the rainwater to smoothly enter the PP module pool 6 through the outlet pipe 2 for storage, reducing the adverse impact on the collection of rainwater.

[0024] A runoff hole is opened at the bottom of the runoff box 9. A first float 16 is arranged in the inner cavity of the runoff box 9, and a second float 15 is arranged at the bottom of the runoff box 9. A connecting rod connecting the first float 16 and the second float 15 is fixedly installed on the outer wall of the first float 16. The first float 16 and the second float 15 are respectively located directly above and directly below the runoff hole. One end of the connecting rod away from the first float 16 penetrates through the runoff hole and is fixedly connected to the top of the second float 15.

[0025] A fixing ring 22 for supporting the bottom of the first floating ball 16 is fixedly installed in the inner cavity of the flow diversion box 9. The fixing ring 22 is located directly above the flow diversion hole, and a plurality of support columns 23 connected to the bottom of the inner cavity of the flow diversion box 9 are fixedly installed in a circular distribution at the bottom of the fixing ring 22. The volume and mass of the first floating ball 16 are greater than those of the second floating ball 15. When there is no rainwater collected in the flow diversion box 9 or the buoyancy generated by the collected rainwater is less than the weights of the first floating ball 16 and the second floating ball 15, the bottom of the first floating ball 16 fits against the top of the fixing ring 22, and at the same time, the top of the second floating ball 15 is disengaged from the bottom of the flow diversion hole. At this time, the rainwater collected at the bottom of the inner cavity of the flow diversion box 9 passes through the plurality of support columns 23 and enters the inner cavity of the flow diversion hole, and then flows out through the flow diversion hole, thereby realizing the discharge of the initial rainwater and preventing harmful substances (such as oil stains and harmful chemicals, etc.) in the initial rainwater from entering the PP module pool 6 along with the later rainwater through the water inlet pipe 1, and avoiding the rainwater accumulated in the PP module pool 6 from being polluted by oil stains or chemicals.

[0026] Among them, the plurality of support columns 23 distributed in a circular shape can intercept larger stones, leaves or garbage, etc. When the space between some adjacent two support columns 23 is blocked by impurities with a larger volume, the rainwater will enter the flow diversion hole through the gaps existing between the other two support columns 23, preventing it from completely blocking the top of the flow diversion hole and causing the rainwater to be unable to enter the flow diversion hole.

[0027] A liquid outlet pipe 10 communicating with the flow diversion hole is fixedly installed at the bottom of the flow diversion box 9. The second floating ball 15 is located in the inner cavity of the liquid outlet pipe 10. The volume of the second floating ball 15 is smaller than that of the first floating ball 16. One end of the liquid outlet pipe 10 away from the flow diversion box 9 is fixedly installed with a flow diversion pipe 8 communicating with its inner cavity. Among them, the initial rainwater passes through the flow diversion hole and enters the inner cavity of the liquid outlet pipe 10, and at the same time, under its own weight, it quickly enters the inner cavity of the flow diversion pipe 8 through the liquid outlet pipe 10. One end of the flow diversion pipe 8 is connected to the urban sewer pipe, and the rainwater entering the inner cavity of the flow diversion pipe 8 flows into the urban sewer pipe, thereby realizing the centralized collection of the initial rainwater.

[0028] Among them, the inner diameter of the water inlet pipe 1 is much larger than the diameter of the flow diversion hole. Since the amount of initial rainwater is small, the rainwater collected at the bottom of the inner cavity of the flow diversion box 9 can be quickly discharged through the flow diversion hole. As the amount of rainwater continuously increases, the amount of rainwater collected at the bottom of the flow diversion box 9 is much larger than the discharge amount through the flow diversion hole, causing the amount of rainwater collected at the bottom of the flow diversion box 9 to continuously increase. At this time, the first floating ball 16 is gradually submerged by the collected rainwater. When the buoyancy generated by the collected rainwater is greater than the total mass of the first floating ball 16 and the second floating ball 15, the first floating ball 16 moves upward as the amount of collected rainwater continuously increases until the top of the second floating ball 15 fits against the bottom of the flow diversion hole, thereby blocking the flow diversion hole and preventing the middle and later period rainwater collected in the inner cavity of the flow diversion box 9 from flowing out through the flow diversion hole, and enabling the rainwater to quickly collect in the inner cavity of the flow diversion box 9.

[0029] Since the diameter of the flow diversion hole is small, the pressure borne by the second floating ball 15 is small, much smaller than the buoyancy when the first floating ball 16 is completely submerged by rainwater, ensuring that after the first floating ball 16 is completely immersed in rainwater, the top of the second floating ball 15 will not separate from the bottom of the flow diversion hole.

[0030] A support plate is fixedly installed in the inner cavity of the flow diversion box 9. The top of the support plate is fixedly installed with a guide pipe 20. A guide rod 21 is slidably installed in the inner cavity of the guide pipe 20. The end of the guide rod 21 extending to the outside is fixedly connected to the top of the first floating ball 16. When the first floating ball 16 moves upward under the action of buoyancy, the guide rod 21 moves upward with the first floating ball 16 and moves along the inner cavity of the guide pipe 20, thereby limiting the movement trajectory of the first floating ball 16 and limiting the first floating ball 16 after movement, preventing the first floating ball 16 from swaying and shifting due to the impact of rainwater when moving up and down and at rest, and improving the stability of the first floating ball 16 when moving and at rest.

[0031] A plurality of intercepting nets 17 for intercepting impurities in rainwater are fixedly installed in the inner cavity of the water outlet pipe 2. As the volume of rainwater collected in the inner cavity of the flow diversion box 9 continuously increases, when the rainwater liquid level is higher than the bottom of the inner cavity of the water outlet pipe 2, the rainwater collected in the inner cavity of the flow diversion box 9 will flow into the inner cavity of the water outlet pipe 2 and pass through the plurality of intercepting nets 17 into the inner cavity of the sedimentation tank 3. When the rainwater passes through the plurality of intercepting nets 17, impurities in the rainwater larger than the aperture of the intercepting nets 17 will be intercepted by the intercepting nets 17, preventing the impurities doped in the rainwater from entering the inner cavity of the sedimentation tank 3.

[0032] The apertures of the plurality of intercepting nets 17 are different. At the same time, the plurality of intercepting nets 17 are arranged in sequence in the inner cavity of the water outlet pipe 2 in a direction away from the filter basket 12. At the same time, the aperture of the intercepting net 17 closest to the filter basket 12 is larger than the aperture of the intercepting net 17 away from the filter basket 12. After the rainwater enters the inner cavity of the water outlet pipe 2, the impurities are first intercepted by the intercepting net 17 closest to the filter basket 12, and the impurities smaller than the aperture of the intercepting net 17 closest to the filter basket 12 are intercepted by the next intercepting net 17, thereby realizing the interception of impurities of different sizes and isolating the impurities of different sizes through the intercepting nets 17, realizing the subdivision of impurities of different sizes, and preventing the impurities in the rainwater from concentrating and accumulating in a certain area of the water outlet pipe 2 and affecting the normal flow of rainwater in the inner cavity of the water outlet pipe 2.

[0033] Through the applicant's understanding of the prior art, when the precipitation decreases or the precipitation stops, the rainwater below the liquid level of the water outlet pipe 2 needs to be discharged from the inside of the flow diversion box 9 to prevent a large number of bacteria and worms from breeding in the inside of the flow diversion box 9 for a long time, and to avoid the bacteria and worms bred when it rains again from entering the purification pool and affecting the reuse of rainwater.

[0034] To solve the above problems, a drain pipe 24 is fixedly installed at the bottom of the inner cavity of the flow diversion box 9. One end of the drain pipe 24 is fixedly connected to the outer wall of the liquid outlet pipe 10, and a hemispherical anti-blocking plate 14 for preventing blockage is fixedly installed at the top of the drain pipe 24. A plurality of diversion grooves are annularly distributed on the outer wall of the hemispherical anti-blocking plate 14. The rainwater in the inner cavity of the flow diversion box 9 continuously passes through the plurality of diversion grooves under the action of gravity and enters the inner cavity of the drain pipe 24, so as to continuously discharge the rainwater in the flow diversion box 9 into the inner cavity of the flow diversion pipe 8. When the water inlet pipe 1 stops water inlet (that is, the rainwater remaining on the road surface, square and roof stops entering the inner part of the water inlet pipe 1), as the water outlet pipe 2 and the drain pipe 24 continuously discharge the rainwater in the inner part of the flow diversion box 9, the amount of rainwater in the inner cavity of the flow diversion box 9 continuously decreases. When the buoyancy generated by the rainwater in the flow diversion box 9 on the first floating ball 16 is less than the weight of the first floating ball 16 and the second floating ball 15, the first floating ball 16 moves downward until the bottom fits against the top of the fixed ring 22. Thus, the rainwater and some impurities with smaller volume will pass through the adjacent two support columns 23 and enter the inner cavity of the liquid outlet pipe 10, and enter the inner cavity of the flow diversion pipe 8 through the liquid outlet pipe 10. Under the action of the flow diversion holes and the drain pipe 24, the discharge of the rainwater in the flow diversion box 9 is accelerated until the remaining rainwater liquid level is flush with the liquid level of the flow diversion holes, effectively preventing a large number of bacteria and worms from breeding in the inner cavity of the flow diversion box 9 due to the long-term existence of a large amount of rainwater, avoiding the bacteria and worms bred when it rains again from entering the purification pool, and reducing the impact on the reuse of rainwater.

[0035] When the rainwater enters the inside of the drain pipe 24, it passes through the diversion grooves and enters, which can effectively prevent the unblocked diversion grooves from providing a flow channel for the rainwater to enter the inside of the drain pipe 24 when some of the diversion grooves are blocked, and is beneficial to continuously discharge the rainwater through the drain pipe 24.

[0036] When the rainwater at the bottom edge of the inner cavity of the flow diversion box 9 remains undischarged through the flow diversion holes and the drain pipe 24, the remaining rainwater will evaporate for a long time until the remaining rainwater completely dries up, avoiding the breeding of bacteria and worms in the remaining rainwater.

[0037] Through the applicant's understanding of the prior art, after different types and volumes of impurities are intercepted by the multiple intercepting nets 17, the intercepted impurities will adhere to the outside of the intercepting nets 17 along with the backflow of the rainwater. When the rainwater stops flowing, the floating impurities will accumulate at the bottom of the inner cavity of the water outlet pipe 2 under the action of gravity. The long-term accumulation causes an increase in the number of impurities intercepted by the intercepting nets 17 in the inner cavity of the water outlet pipe 2. When the rainwater impacts the accumulated impurities again, the accumulated impurities adhere to the outside of the intercepting nets 17 again, which easily causes the intercepting nets 17 to be blocked, affecting the subsequent filtration of the rainwater and reducing the flow rate of the rainwater in the water outlet pipe 2, and easily leading to the overflow of the rainwater in the flow diversion equipment and polluting the surrounding environment.

[0038] To solve the above problems, through holes communicating with its own inner cavity are provided at both the top and bottom of the water outlet pipe 2. One end of the U-shaped pipe 11 is located in the inner cavity of the flow diversion box 9, and the other end of the U-shaped pipe 11 penetrates through the two through holes and extends to directly below the water outlet pipe 2. The end of the U-shaped pipe 11 located in the inner cavity of the flow diversion box 9 is above the other end of itself. Through holes are provided on the outer wall, the outer wall and the bottom of the filter basket 12 of the flow diversion box 9. One end of the U-shaped pipe 11 penetrates through multiple through holes and extends to directly below the filter basket 12. At the same time, the other end of the U-shaped pipe 11 is fixedly connected to the outer wall of the flow diversion pipe 8. The height difference between the two ends of the U-shaped pipe 11 is at least 300 mm to ensure sufficient water flow velocity during siphonage.

[0039] An electromagnetic valve one 13 for controlling water flow is provided in the inner cavity of the water outlet pipe 2. An electromagnetic valve two is fixedly installed in the inner cavity of the U-shaped pipe 11. The electromagnetic valve two is located between the water outlet end of the U-shaped pipe 11 and the water outlet pipe 2. When there is a large amount of impurities accumulated between two adjacent intercepting nets 17, the electromagnetic valve one 13 and the electromagnetic valve two are started. The inner cavity of the water outlet pipe 2 is blocked by the electromagnetic valve one 13, and the inner cavity of the U-shaped pipe 11 can be blocked by the electromagnetic valve two. Then, the inside of the water inlet pipe 1 is filled with water (the water in the purification pool can be injected into the water inlet pipe 1 through a water pump, or tap water can be injected into the water inlet pipe 1, and the injection is selectively carried out according to actual needs) until the liquid level is higher than the top of the U-shaped pipe 11 (the linear distance between the liquid level and the top of the U-shaped pipe 11 is greater than 1 m to prevent the injected water from being discharged through the drain pipe 24 in a short time and causing the liquid level height to be lower than the top of the U-shaped pipe 11). At this time, the water inlet end of the U-shaped pipe 11 and the electromagnetic valve two are filled with the injected water. After the impurities in the inner cavity of the water outlet pipe 2 are completely precipitated at the bottom of the inner cavity of the water outlet pipe 2, the electromagnetic valve two is started again to make the two ends of the U-shaped pipe 11 communicate with each other. At this time, the water in the inner cavity of the U-shaped pipe 11 enters the inner cavity of the flow diversion pipe 8 again. Then, the electromagnetic valve two is started to block the inner cavity of the U-shaped pipe 11 again. Due to the instantaneous closing of the electromagnetic valve two, the water flow above the electromagnetic valve two impacts the valve plate of the electromagnetic valve two, resulting in a sudden change in the fluid kinetic energy in the inner cavity of the U-shaped pipe 11. After the water flow impacts the valve body, the water flow returns due to inertia, resulting in a rapid increase in the water pressure in the inner cavity of the U-shaped pipe 11, causing a water hammer effect to be formed in the inner cavity of the U-shaped pipe 11.

[0040] When the water in the inner cavity of the U-shaped pipe 11 flows back, the flowing-back water will pass through the bending area of the U-shaped pipe 11, thereby impacting the inner wall of the bend of the U-shaped pipe 11, slowing down the rate of the water flow when it enters the inner cavity of the flow diversion box 9 again. At the same time, when the bending area buffers the water flow, it can also change the direction of part of the water flow, which can collide with the flowing-back water, further increasing the pressure on the outer wall of the U-shaped pipe 11 caused by the water flow between the bending area and the electromagnetic valve two.

[0041] A diversion pipe 18 is arranged in the inner cavity of the water outlet pipe 2. One end of the diversion pipe 18 is fixedly connected to the outer wall of the U-shaped pipe 11. Installation holes adapted to the diversion pipe 18 are formed at one ends of a plurality of intercepting nets 17. A plurality of scouring heads 19 for scouring impurities accumulated at the bottom of the inner cavity of the water outlet pipe 2 are fixedly installed on the outer wall of the diversion pipe 18. A solenoid valve three for controlling the water output of the plurality of scouring heads 19 is fixedly installed in the inner cavity of the diversion pipe 18. When the water pressure in the U-shaped pipe 11 rises, the solenoid valve three is started. At this time, the water in the inner cavity of the U-shaped pipe 11 is quickly ejected through the plurality of scouring heads 19, so that the water flow around the impurities deposited at the bottom of the inner cavity of the water outlet pipe 2 increases rapidly, and the impurities deposited at the bottom of the inner cavity of the water outlet pipe 2 move along with the water flow.

[0042] During this process, a water hammer effect is formed in the inner cavity of the U-shaped pipe 11, which can make the water in the descending stage in the inner cavity of the U-shaped pipe 11 quickly flow back after hitting the valve plate of the solenoid valve two, thereby intensifying the increase in the water flow pressure in the descending stage of the U-shaped pipe 11 and hitting the inner wall of the descending end of the U-shaped pipe 11. At the same time, the water in the ascending stage in the inner cavity of the U-shaped pipe 11 flows back under the action of gravity and the impact of the water flow in the descending stage. When the water flow in the descending stage in the inner cavity of the U-shaped pipe 11 impacts its inner wall, the solenoid valve three is immediately opened. At this time, the water in the descending stage in the inner cavity of the U-shaped pipe 11 quickly surges into the inner cavity of the diversion pipe 18 (because the water pressure in the descending stage in the inner cavity of the U-shaped pipe 11 is greater than the water pressure inside the diversion pipe 18), causing the water pressure inside the diversion pipe 18 to rise suddenly. When the water pressure inside the diversion pipe 18 is greater than the water pressure inside the water outlet pipe 2, the water inside the diversion pipe 18 is quickly ejected through the plurality of scouring heads 19. At the same time, when the water passes through the scouring heads 19, a water column is formed and sprayed towards the bottom of the inner cavity of the water outlet pipe 2. The water column formed by the scouring heads 19 can scour the impurities accumulated at the bottom of the inner cavity of the water outlet pipe 2, and at the same time, the formed water column can exert pressure on the water in the inner cavity of the water outlet pipe 2, causing the water in the inner cavity of the water outlet pipe 2 to flow towards the inner cavity of the waste flow box 9. Some of the impurities are scoured into the inner cavity of the waste flow box 9, and the rest of the impurities float in the inner cavity of the water outlet pipe 2 and enter the inner cavity of the waste flow box 9 along with the water flow. Thus, the impurities accumulated at the bottom of the inner cavity of the water outlet pipe 2 can be cleaned by the water hammer effect formed in the inner cavity of the U-shaped pipe 11. Utilizing the water hammer effect to accelerate the water inside the U-shaped pipe 11 can more effectively achieve the cleaning of the accumulated impurities. A plurality of flushing heads 19 and a plurality of intercepting nets 17 are arranged alternately, and the water outlet ends of the plurality of flushing heads 19 are inclined towards the bottom of the water outlet pipe 2. The outer walls of the plurality of intercepting nets 17 are provided with insertion holes adapted to the flushing heads 19. The water outlet ends of the flushing heads 19 penetrate through the insertion holes and extend to the other end of the intercepting net 17. When the water in the inner cavity of the U-shaped pipe 11 is sprayed out through the plurality of flushing heads 19, a thrust is provided to the water in the inner cavity of the water outlet pipe 2 to flow towards the inner cavity of the waste flow box 9, so that the impurities deposited at the bottom of the inner cavity of the water outlet pipe 2 pass through the intercepting net 17 (since the aperture of the intercepting net 17 closest to the inner cavity of the waste flow box 9 is larger than the aperture of the intercepting net 17 farthest from the inner cavity of the waste flow box 9) and flow towards the inner cavity of the waste flow box 9 along with the water flow. Then, the opening and closing of the solenoid valve three and the solenoid valve two are repeatedly controlled, so that the water hammer effect can occur multiple times in the inner cavity of the U-shaped pipe 11, so as to impact the impurities deposited at the bottom of the inner cavity of the water outlet pipe 2 multiple times, so that the impurities on one side of the intercepting net 17 can continuously enter the interior of the waste flow box 9. As the amount of water in the waste flow box 9 decreases, part of the impurities are intercepted by the filter basket 12, and the rest are deposited at the bottom of the inner cavity of the waste flow box 9, avoiding the intercepting net 17 being blocked by impurities and affecting the subsequent filtration of rainwater and reducing the flow rate of rainwater inside the water outlet pipe 2, preventing rainwater from overflowing from the top of the waste flow box 9 and polluting the surrounding environment.

[0043] Among them, the U-shaped pipe 11, the flushing head 19, the solenoid valve two and the solenoid valve three form a cleaning component. The cleaning component can flush the impurities intercepted by the intercepting net 17 with the rainwater in the waste flow box 9, so that the impurities deposited at the bottom of the inner cavity of the water outlet pipe 2 enter the interior of the waste flow box 9, avoiding the intercepting net 17 being blocked by impurities.

[0044] Through the applicant's understanding of the prior art, in the southern region (such as the south of the Yangtze River and South China), in summer (from June to August), affected by monsoons and typhoons, the precipitation is relatively large and concentrated, with many heavy rains or short-term heavy precipitation (the average precipitation is 600-700 millimeters). Therefore, when the device is used in southern cities, it is necessary for workers to enter the interior of the waste flow box 9 to observe whether the intercepting net 17 is blocked by impurities, increasing the workload of the workers.

[0045] To solve the above technical problems, industrial cameras for impurity discrimination and fill lights are fixedly installed on the inner wall of the water outlet pipe 2 and in the inner cavity of the flow diversion tank 9. The industrial cameras and fill lights located in the inner cavity of the water outlet pipe 2 are located between two of the interception nets 17. When rainwater enters the flow diversion tank 9 and flows in the inner cavity of the water outlet pipe 2, the industrial cameras continuously take pictures of the interception nets 17 and the bottom of the flow diversion tank 9, and at the same time, the fill lights are turned on to provide illumination for the industrial cameras. While taking pictures, the industrial cameras transmit the taken pictures to the background processing system in real time. The background processing system accelerates the processing of the transmitted pictures. If a large amount of impurities float on one side of the interception net 17, after the rainfall stops, the background processing system starts the water pump to inject water into the flow diversion tank 9 and repeats the switching operations of the second electromagnetic valve and the third electromagnetic valve, so as to clean the impurities accumulated outside the interception net 17.

[0046] Among them, the industrial cameras, fill lights and background processing system constitute a visual sewage disposal system, which is the Siemens SIMATIC VS702 system launched at the German IFAT exhibition. It can distinguish floating objects and dissolved pollutants. Through this visual sewage disposal system, the situation and types of impurities inside the water outlet pipe 2 can be monitored in real time, and the flow diversion tank 9 can be automatically filled with water to remove the impurities intercepted by the interception net 17, reducing the workload of the staff and improving the cleaning efficiency of the impurities accumulated in the inner cavity of the water outlet pipe 2.

[0047] Among them, the straight-line distance from one end of the U-shaped pipe 11 located in the inner cavity of the flow diversion tank 9 to the bottom of the inner cavity of the flow diversion tank 9 is less than 30 cm. After the impurities outside the interception net 17 are cleaned, the valve plates connected to the second electromagnetic valve and the third electromagnetic valve are controlled by the visual processing system to be in the closed state. After the inner cavity of the U-shaped pipe 11 is filled with water again, the second electromagnetic valve and the third electromagnetic valve are started to make the valve plates in the open and closed state. At this time, the water at the descending end of the U-shaped pipe 11 continuously flows into the inner cavity of the flow diversion pipe 8, making the descending end of the U-shaped pipe 11 in a negative pressure state, so as to continuously suck the water at the ascending end inside the U-shaped pipe 11 into the flow diversion pipe 8, so that a siphon effect appears inside the U-shaped pipe 11. At this time, the impurities accumulated at the bottom of the inner cavity of the flow diversion tank 9 enter the inner cavity of the U-shaped pipe 11 along with the water flow and finally enter the flow diversion pipe 8 along with the water flow, so as to clean the impurities accumulated at the bottom of the inner cavity of the flow diversion tank 9.

[0048] Among them, when the water flow at the descending end of the U-shaped pipe 11 flows rapidly, the air pressure inside the U-shaped pipe 11 drops rapidly, so that a negative pressure chamber is formed inside the diversion pipe 18, and the impurities and water accumulated at the bottom of the inner cavity of the water outlet pipe 2 can be quickly sucked into the inner cavity of the diversion pipe 18 through multiple scouring heads 19, so as to clean the impurities accumulated at the bottom of the inner cavity of the water outlet pipe 2 again.

[0049] The design of this application is more suitable for places with relatively large rainfall such as South China, coastal areas, and wetland protection areas where there is sufficient rainfall. Through the deep integration of mechanical structure designs such as U-shaped pipes 11 and floating balls with intelligent control technologies, a rainwater management system integrating efficient separation, intelligent regulation, and self-maintenance is constructed, which has significant application value especially in the fields of rainwater and flood management and sponge city construction.

[0050] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rain and sewage solid-liquid separation device, characterized in that, Including: A flow rejection box (9), on one side of which a water inlet pipe (1) communicating with its inner cavity is fixedly installed, and on the other side of which a water outlet pipe (2) communicating with its inner cavity is fixedly installed. A filter basket (12) for filtering impurities in rainwater is fixedly installed in the inner cavity of the flow rejection box (9). A plurality of intercepting nets (17) for intercepting impurities in rainwater are fixedly installed in the inner cavity of the water outlet pipe (2); A flow rejection hole is opened at the bottom of the flow rejection box (9). A first floating ball (16) is arranged in the inner cavity of the flow rejection box (9), and a second floating ball (15) is arranged at the bottom of the flow rejection box (9). A connecting rod connecting the first floating ball (16) is fixedly installed on the outer wall of the first floating ball (16). A cleaning member is arranged inside the flow rejection box (9), and the cleaning member can wash the impurities intercepted by the intercepting net (17) by means of the rainwater in the flow rejection box (9).

2. The rain and sewage solid-liquid separation device according to claim 1, characterized in that: The cleaning member includes a U-shaped pipe (11) and a diversion pipe (18). Through holes communicating with its inner cavity are opened at the top and bottom of the water outlet pipe (2). One end of the U-shaped pipe (11) is located in the inner cavity of the flow rejection box (9), and the other end of the U-shaped pipe (11) penetrates through the two through holes and extends to directly below the water outlet pipe (2). The end of the U-shaped pipe (11) located in the inner cavity of the flow rejection box (9) is above the other end of the U-shaped pipe (11). A diversion pipe (18) is arranged in the inner cavity of the water outlet pipe (2). One end of the diversion pipe (18) is fixedly connected to the outer wall of the U-shaped pipe (11). Installation holes adapted to the diversion pipe (18) are opened at one ends of a plurality of intercepting nets (17). A plurality of scouring heads (19) for scouring the impurities accumulated at the bottom of the inner cavity of the water outlet pipe (2) are fixedly installed on the outer wall of the diversion pipe (18); An electromagnetic valve two is fixedly installed in the inner cavity of the U-shaped pipe (11), and the electromagnetic valve two is located between the water outlet end of the U-shaped pipe (11) and the water outlet pipe (2). An electromagnetic valve one (13) for controlling the water flow is arranged in the inner cavity of the water outlet pipe (2).

3. The rain and sewage solid-liquid separation device according to claim 2, characterized in that: An electromagnetic valve three for controlling the water output of a plurality of scouring heads (19) is fixedly installed in the inner cavity of the diversion pipe (18).

4. The rain and sewage solid-liquid separation device according to claim 2, characterized in that: A plurality of scouring heads (19) and a plurality of intercepting nets (17) are arranged in a staggered manner, and the water outlet ends of the plurality of scouring heads (19) are inclined towards the direction close to the bottom of the water outlet pipe (2). Interpenetrating holes adapted to the scouring heads (19) are opened on the outer walls of the plurality of intercepting nets (17), and the water outlet ends of the scouring heads (19) penetrate through the interpenetrating holes and extend to the other end of the intercepting net (17).

5. The rain and sewage solid-liquid separation device according to claim 4, wherein: Industrial cameras and supplementary lights for identifying impurities are fixedly installed on the inner wall of the water outlet pipe (2) and in the inner cavity of the flow rejection box (9), and the industrial camera and the supplementary light located in the inner cavity of the water outlet pipe (2) are located between two of the intercepting nets (17).

6. A rain and sewage solid-liquid separation device according to claim 1, characterized in that: A fixing ring (22) for supporting the bottom of the first floating ball (16) is fixedly installed in the inner cavity of the flow rejection box (9). The fixing ring (22) is located directly above the flow rejection hole, and a plurality of support columns (23) connected to the bottom of the inner cavity of the flow rejection box (9) are fixedly installed in a circular distribution at the bottom of the fixing ring (22).

7. A rain and sewage solid-liquid separation device according to claim 6, characterized in that: A liquid outlet pipe (10) communicating with the waste flow hole is fixedly installed at the bottom of the waste flow box (9). The second floating ball (15) is located in the inner cavity of the liquid outlet pipe (10). The volume of the second floating ball (15) is smaller than that of the first floating ball (16). One end of the liquid outlet pipe (10) far away from the waste flow box (9) is fixedly installed with a waste flow pipe (8) communicating with its inner cavity.

8. A rain and sewage solid-liquid separation device according to claim 6, characterized in that: A support plate is fixedly installed in the inner cavity of the waste flow box (9). A guide pipe (20) is fixedly installed at the top of the support plate. A guide rod (21) is slidably installed in the inner cavity of the guide pipe (20). One end of the guide rod (21) extending to the outside is fixedly connected to the top of the first floating ball (16).

9. A rain and sewage solid-liquid separation device according to claim 7, characterized in that: A drain pipe (24) is fixedly installed at the bottom of the inner cavity of the waste flow box (9). One end of the drain pipe (24) is fixedly connected to the outer wall of the liquid outlet pipe (10). And a hemispherical anti-blocking plate (14) for preventing blockage is fixedly installed at the top of the drain pipe (24). A plurality of diversion grooves are annularly distributed on the outer wall of the hemispherical anti-blocking plate (14).

10. A rain and sewage solid-liquid separation method, which uses a rain and sewage solid-liquid separation device described in claim 1, and is characterized in that, Including the following steps: Control the opening and closing of the third solenoid valve and the second solenoid valve repeatedly, so that water hammer effect can occur in the inner cavity of the U-shaped pipe (11) multiple times, so as to impact the impurities deposited at the bottom of the inner cavity of the water outlet pipe (2) multiple times, enabling the impurities on one side of the intercepting net (17) to continuously enter the interior of the waste flow box (9). As the water volume in the waste flow box (9) decreases, part of the impurities are intercepted by the filter basket (12), and the rest are deposited at the bottom of the inner cavity of the waste flow box (9), avoiding the intercepting net (17) being blocked by impurities, which affects the subsequent filtration of rainwater and reduces the flow rate of rainwater inside the water outlet pipe (2), and preventing rainwater from overflowing from the top of the waste flow box (9) and polluting the surrounding environment.

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