Intelligent cut-off device applying rain and sewage diversion and cut-off method of intelligent cut-off device

Abstract

The invention relates to the technical field of rain and sewage diversion, and discloses an intelligent cut-off device applying rain and sewage diversion and a cut-off method.The intelligent cut-off device comprises a tank body, a frame body, a sewage pump, a box body and a diversion mechanism, a base is fixed to the bottom of the tank body, a top base is fixed to the top of the tank body, and a first pipe body, a second pipe body and a third pipe body are arranged on the outer side wall of the tank body; a filter screen is arranged on the inner side wall of the tank body; the frame body is arranged at the top of the base, and a supporting block is arranged on the frame body; the sewage pump is arranged on the supporting block and is used for pumping out sewage; the box body is fixed to one side of the supporting block, a bottom plate is fixed to the bottom end of the box body, a plate body is slidably connected to the bottom plate, a seventh pipe body is arranged on the plate body, and a spray head is fixed to the bottom end of the seventh pipe body; the condition of sludge at the bottom of the base is monitored and judged in real time, and the backwashing process is started in time when the sludge density reaches a set threshold value, so that the problem that a drainage channel and a valve guide structure are blocked by sludge accumulation is effectively avoided.

Description

Technical Field

[0001] This invention relates to the technical field of rainwater and sewage separation, specifically to an intelligent interception device and method for rainwater and sewage separation. Background Technology

[0002] Intelligent interception devices for rainwater and sewage separation are mainly used in urban drainage network renovation, industrial park rainwater and sewage separation systems, and urban village drainage management. They are core equipment for achieving complete sewage collection and orderly rainwater discharge. The devices are typically equipped with rainfall sensors, water quality sensors, and level sensors to monitor rainfall, pollutant concentrations, and water levels in the pipe network in real time, transmitting the data to a PLC control module. In sunny conditions, the control module drives the interception valve to fully open, intercepting all domestic sewage and industrial wastewater in the pipe network and diverting it to the sewage pipe network for treatment at a wastewater treatment plant. In rainy conditions, when rainfall reaches a set threshold and the rainwater quality becomes cleaner, the control module automatically adjusts the opening of the interception valve to intercept initially polluted rainwater, while the clean rainwater is directly discharged into natural water bodies through the rainwater pipe network, thus achieving rainwater and sewage separation.

[0003] In existing technologies, sludge accumulation is prone to occur at the bottom of the base during long-term operation. This sludge mainly originates from suspended solids carried in sewage, as well as silt and impurities carried in initial rainwater. If the sludge is not cleaned in time, it will gradually block the drainage channels and valve guide structures of the base. This not only increases the mechanical resistance of the shut-off valve, causing valve jamming and response delays, but also interferes with the detection accuracy of the liquid level sensor, leading to misjudgments of the operating conditions by the control module, ultimately affecting the interception and diversion effect of the device. Therefore, this application proposes an intelligent interception device and its interception method for rainwater and sewage diversion. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an intelligent interception device and method for rainwater and sewage separation, which effectively prevents the accumulation of silt at the bottom of the base. It solves the problem in existing rainwater and sewage separation devices where silt accumulation at the bottom of the base leads to blockage of the drainage channel and valve guide structure, ultimately affecting the interception and separation effect.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an intelligent interception device for rainwater and sewage separation, comprising: a tank, the bottom of which is fixed with a base and the top of which is fixed with a top seat; a pipe body one, a pipe body two, and a pipe body three arranged on the outer side wall of the tank, and a filter screen arranged on the inner side wall of the tank; a frame, which is arranged on the top of the base and has a support block; a sewage pump, which is arranged on the support block and is used to pump out sewage; a box, which is fixed to one side of the support block and has a base plate fixed to the bottom of the box; a plate body slidably connected to the base plate; a pipe body seven arranged on the plate body; and a nozzle fixed to the bottom end of the pipe body seven; and a diversion mechanism, which is arranged on the box and is used to introduce part of the sewage discharged by the sewage pump into the nozzle and discharge the other part, so that the nozzle sprays the liquid to mix the sludge on the base.

[0008] Preferably, the diversion mechanism includes: a pipe body six, which is disposed at the outlet end of the sewage pump, and a pipe body four and a pipe body five are disposed on the pipe body six; and a solenoid valve one, which is disposed on the pipe body five.

[0009] Preferably, the liquid outlet end of the tube body five is provided with a vortex separator, the top liquid outlet end of the vortex separator is provided with a tube body eight, the liquid outlet end of the tube body eight is provided with a fitting, and the liquid outlet end of the fitting is connected to the tube body seven through a flexible hose.

[0010] Preferably, the nozzle is a spiral nozzle.

[0011] Preferably, a cylinder is fixed on the box body, the inlet end of the cylinder is connected to one of the outlet ends of the pipe fitting, the pipe fitting is a four-way pipe fitting, a piston rod is slidably connected inside the cylinder, a spring is fixed between the cylinder and the plate, the spring is sleeved on the outside of the piston rod, and the bottom end of the piston rod is fixed to the plate.

[0012] Preferably, the cylinder body one is provided with a solenoid valve three at the liquid inlet end and a solenoid valve four at the liquid outlet end.

[0013] Preferably, the box body is provided with a cylinder body two, the inner side wall of the cylinder body two is slidably connected with a piston rod two, the bottom end of the piston rod two is fixed to the plate body, a spring two is fixed between the cylinder body two and the plate body, the air inlet end of the cylinder body two is provided with a pipe body nine, and a solenoid valve two is provided on the pipe body nine.

[0014] Preferably, a side plate is fixed to the top of the plate, a shaft is rotatably connected inside the box, a gear is fixed to the outer side wall of the shaft, and a vibrating part is slidably connected to the box. The gear is meshed with the side plate and the vibrating part respectively.

[0015] Preferably, a rod is provided on the top of the plate, a box is fixed on the top of the top seat, a cylinder is provided inside the box on the top of the top seat, a baffle is fixed on the top of the cylinder, a disc is rotatably connected to the inner side wall of the cylinder, a rod sleeve is fixed to the bottom of the disc, and the rod sleeve is engaged with the rod.

[0016] A smart interception method for rainwater and sewage separation includes the following steps:

[0017] The PLC identifies the operating conditions based on external rainfall sensor signals and water quality monitoring signals inside the tank: if there is no rainfall signal and sewage is continuously introduced into the pipe, it is determined to be a sunny day; if the rainfall reaches the set threshold and the turbidity and pollutant concentration of the water decrease with the increase of rainfall, it is determined to be a rainy day and distinguishes between the initial polluted rainwater and the later clean rainwater; at the same time, the vibrating part is inserted into the sludge in the base, the piezoelectric ceramic vibrator is energized and vibrates, and the signal is converted into a 4-20mA standard electrical signal by the transmitter and transmitted to the PLC. The PLC compares the calculated sludge density with the 1.5g / cm³ caking threshold to determine whether to start backwashing.

[0018] The PLC controls the interception path of the gates based on the working conditions: On sunny days, the first gate of the pipe body is closed and the second gate of the pipe body is opened. After the sewage is introduced into the tank through the third pipe body, it is discharged into the sewage network through the second pipe body. The sewage pump is started and stopped as needed, and the accumulated water and a small amount of silt in the tank are discharged through the fourth pipe body to improve the sewage discharge effect. When the water quality does not meet the standards at the beginning of rainy days, the above gate status is maintained to intercept polluted rainwater. After the water quality meets the standards and the rainfall exceeds the threshold, the first gate of the pipe body is opened and the opening of the second gate of the pipe body is adjusted to allow clean rainwater to be directly discharged into natural water bodies. The filter screen simultaneously blocks large impurities to prevent clogging.

[0019] When the sludge density is 1.5 ≥ g / cm³, the PLC triggers backwashing: the sewage pump is started, solenoid valve one is opened, solenoid valve three is energized and solenoid valve four is closed, and the sewage is introduced into cylinder one through pipe body five, vortex separator, and pipe body eight. The hydraulic pressure pushes the piston rod down, causing the plate and nozzle to extend out of the bottom plate and approach the sludge surface; the sewage is diverted through pipe body eight to pipe body seven, and a rotating jet is formed through the spiral nozzle to impact the sludge and suspend it. The suspended sludge is sucked in by the sewage pump and partially discharged, while part of it is circulated and disturbed to form a closed loop. During backwashing, the plate moves the side plate and collects the vibrating part through gear meshing.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides an intelligent interception device and method for rainwater and sewage separation, which has the following beneficial effects:

[0022] 1. This application utilizes an intelligent interception device for separating rainwater and sewage. By monitoring and assessing the sludge condition at the bottom of the base in real time, it promptly initiates a backwashing process when the sludge density reaches a set threshold. This effectively prevents sludge accumulation from clogging drainage channels and valve guide structures. During the backwashing process, a sewage pump and diversion mechanism use a rotating jet to impact the sludge, fully suspending it. The sludge is then either sucked in and discharged by the sewage pump or circulated and agitated, ensuring highly efficient sludge removal.

[0023] 2. This application utilizes an intelligent interception device for separating rainwater and sewage. The PLC accurately identifies different operating conditions, such as sunny or rainy days, based on signals from external rainfall sensors, tank water quality monitoring, and sludge density. It then controls the interception paths of sewage and rainwater by linking the gates according to the operating conditions. Whether effectively discharging sewage into the sewage network on sunny days or rationally separating initial polluted rainwater from subsequent clean rainwater on rainy days, the device can achieve this, significantly improving its interception efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the hidden tube body of the present invention. Figure 1 ;

[0026] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0027] Figure 4 This is a schematic diagram of the structure of the hidden tube body of the present invention. Figure 2 ;

[0028] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0029] Figure 6 This is a schematic diagram of the internal structure of the box in this invention. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the internal structure of the box in this invention. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the internal structure of the box in this invention. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the internal structure of the box in this invention. Figure 2 .

[0033] In the picture:

[0034] 100. Tank body; 110. Pipe body one; 120. Pipe body two; 130. Pipe body three; 140. Base; 150. Filter screen; 160. Top seat; 161. Box body;

[0035] 200. Sewage pump; 210. Frame; 220. Support block; 230. Pipe body four; 240. Pipe body five; 241. Solenoid valve one; 250. Box body; 251. Base plate; 252. Plate; 253. Side plate; 260. Pipe body six; 270. Pipe body seven; 280. Sprinkler head;

[0036] 310. Vortex separator; 320. Tube body 8; 330. Pipe fittings;

[0037] 410. Cylinder block 1; 420. Piston rod 1; 430. Spring 1;

[0038] 510. Cylinder body 2; 520. Piston rod 2; 530. Spring 2; 540. Tube body 9; 550. Solenoid valve 2;

[0039] 610. Shaft; 620. Gear; 630. Vibrating part;

[0040] 710. Rod body; 720. Cylinder body; 730. Disc; 740. Baffle; 750. Rod sleeve. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In existing technologies, sludge accumulation is highly likely to occur at the bottom of the base during long-term operation. This sludge mainly originates from suspended solids carried in sewage, as well as silt and impurities carried in initial rainwater. If the sludge in the base is not cleaned in time, it will gradually block the drainage channels and valve guide structures of the base. This will not only increase the mechanical resistance of the shut-off valve, causing valve action to be stuck and response to be delayed, but will also interfere with the detection accuracy of the liquid level sensor, causing the control module to misjudge the operating conditions, ultimately affecting the interception and diversion effect of the device.

[0043] To address the problem of silt accumulation at the bottom of the base in existing technologies, this invention provides an intelligent interception device that separates rainwater and sewage.

[0044] As attached Figure 1-5As shown, this embodiment provides an intelligent interception device for rainwater and sewage separation, including a tank 100, a first pipe 110, a second pipe 120, a third pipe 130, and a base 140. The tank 100 is mounted on top of the base 140. The first pipe 110 and the third pipe 130 are symmetrically arranged on the outer wall of the tank 100. The second pipe 120 is located on the outer wall of the tank 100 and below the first pipe 110 and the third pipe 130. The first pipe 110 is used to connect to a river, the third pipe 130 is used to connect to the sewage end, and the second pipe 120 is the first sewage discharge end. The tank 100... A second sewage discharge end is provided on the outer side wall; gates are provided on the inner side wall of the tank 100 near the first pipe 110 and the second pipe 120 to control the flow direction of sewage; a frame 210 is provided on the top of the base 140, and a support block 220 is provided on the frame 210. A sewage pump 200 is connected to the support block 220 through a connecting rod. The sewage pump 200 is used to lift the sewage inside the tank 100 and discharge it through the second sewage discharge end, further improving the sewage discharge effect inside the tank 100; a filter screen 150 is provided on the inner side wall of the tank 100 to block large impurities and leaves. Under sunny conditions, wastewater is introduced into tank 100 through pipe 130. The gate on pipe 110 is closed, while the gate on pipe 2120 is opened, allowing all domestic sewage and industrial wastewater in tank 100 to be introduced into the sewage network through pipe 2120 and transported to a sewage treatment plant for treatment. Under rainy conditions, when rainfall reaches a set threshold and the rainwater quality becomes cleaner, the initial polluted rainwater is intercepted, while the later clean rainwater is directly discharged into natural water bodies through pipe 110, thus achieving separation of rainwater and sewage. The above interception method is existing technology and will not be elaborated further here.

[0045] In this embodiment, the output end of the sewage pump 200 is fixed with a pipe body 260. The pipe body 260 has two liquid outlets, with a pipe body 230 and a pipe body 240 fixed thereon respectively. The pipe body 230 is used to connect to the second sewage outlet. A solenoid valve 241 is provided on the pipe body 240. A nozzle 280 is provided at the liquid outlet of the pipe body 240. The solenoid valve 241 is used to divert the sewage discharged by the sewage pump 200 into the nozzle 280. The nozzle 280 guides the sewage into the bottom area of ​​the tank 100 in a dispersed form, so that the sludge on the top of the base 140 is dispersed, reducing the accumulation of sludge. The dispersed sludge is then sucked back into the pipe body 230 or the pipe body 240 by the sewage pump 200.

[0046] Specifically, nozzle 280 is a spiral nozzle. When working, the fluid enters the spiral guide channel under pressure and then rotates at high speed. The spiral channel drives the sewage to form a high-speed rotating jet. After being sprayed out, it forms a strong liquid jet or a turbulent flow field, thereby disturbing the sludge at the bottom of the base 140, suspending it, and then discharging it with the water flow.

[0047] This embodiment also includes a vortex separator 310 and a pipe fitting 330. The input end of the vortex separator 310 is connected to two pipe bodies 240. Wastewater enters the vortex separator 310 through the pipe bodies 240 and enters the vortex chamber of the separator under a certain pressure. A rotating vortex is formed along the chamber wall. Under the action of centrifugation, solid particles with a density much greater than that of liquid are thrown towards the chamber wall. Under the action of gravity and vortex, they slide downward along the conical chamber wall and are finally discharged into the tank 100. The less dense liquid converges towards the center of the vortex, forming an upward-moving inner vortex, which is introduced and discharged through the top. The pipe fitting 330 is connected to the top of the vortex separator 310 through a pipe body 320. The liquid outlet end of the pipe body 320 is connected to the nozzle 280 through a pipe body 270, thereby reducing the impact of large particles of impurities on the use of the nozzle 280.

[0048] As attached Figure 2-7 As shown, a box 250 is fixed to one side of the support block 220, and a cylinder 410 is fixed to the box 250. The inlet end of the cylinder 410 is connected to one outlet end of the pipe 230. The pipe 230 is a four-way fitting. A piston rod 420 is slidably connected inside the cylinder 410. A plate 252 is fixed to the bottom of the piston rod 420. The plate 252 is used to fix the pipe 270. A base plate 251 is fixed to the bottom of the box 250. The base plate 251 is slidably connected to the plate 252. A spring 430 is provided between the cylinder 410 and the plate 252. The spring 430 is sleeved on the outside of the piston rod 420 and is used to hold the piston rod 420 in place. 0. Reset; Sewage is introduced into cylinder 410 through pipe 4230. The introduced sewage is pressurized, and the pressure acts simultaneously in two opposite directions: firstly, it acts on the end face of piston rod 420, generating thrust to overcome the resistance of piston rod 420; secondly, it flows along the internal channel of cylinder 410 to the outlet of cylinder 410 and out into tank 100. The downward movement of piston rod 420 causes plate 252 to move downward, thereby changing the height of pipe 7270 and nozzle 280. This allows nozzle 280 to extend when agitating sludge on base 140, and retract into base plate 251 when not in use, thus protecting nozzle 280. After backwashing, the elasticity of spring 430 resets piston rod 420.

[0049] Specifically, under high-flow drainage conditions, if the nozzle 280 is fixedly installed, it will protrude from the core area of ​​the flow channel, acting like a raised obstacle in the water flow path, thus slowing down the drop in liquid level within the tank 100. However, this application uses the retraction of piston rod 420, allowing the nozzle 280 to be hidden within the base plate 251, generating almost no additional resistance and ensuring smooth high-flow drainage. Under standby or low-flow sewage discharge conditions, sludge will slowly accumulate on the base 140. If a fixed nozzle 280 is used, it will be directly immersed in the sludge layer, and the nozzle holes will be easily blocked by sludge and suspended particles, preventing the subsequent backwash water flow from dispersing properly. Furthermore, fibers and large particles in the sewage will directly entangle and collide with the nozzle 280, causing nozzle deformation. In contrast, with the retraction of the nozzle 280, the nozzle 280 is hidden within the base plate 251, away from the sludge layer and the main water flow area.

[0050] In this embodiment, the inlet and outlet of cylinder 410 can be respectively equipped with solenoid valve three and solenoid valve four. Initially, both solenoid valves are de-energized and closed, and piston rod 420 is retracted to its original position under the action of a spring. During the extension phase of piston rod 420, solenoid valve three is energized and opened, while solenoid valve four is de-energized and closed, allowing liquid to be injected into the cylinder cavity. The hydraulic pressure overcomes the compression force of spring 430 and the frictional force of piston rod 420, pushing piston rod 420 out and compressing spring 430 to store energy. During the reset phase of piston rod 420, liquid injection stops, and solenoid valve three is de-energized and closed. When the solenoid valve is energized and opened, the spring 430 releases its stored energy and pushes the piston rod 420 to retract. The liquid in the cylinder is discharged through the outlet. After completing one cycle, the above actions are repeated to achieve continuous reciprocating motion. When the spiral nozzle 280 moves up and down above the base 140, the height of the nozzle 280 can be dynamically adjusted according to the thickness of the sludge. When the sludge is thick, it moves down to a position close to the base 140, using the spiral water flow to directly impact and break up the hardened sludge clumps. When the sludge is thin, it moves up to avoid the water flow directly impacting the base 140 and causing wear, while expanding the coverage area of ​​the spiral water flow during the up and down movement.

[0051] As attached Figure 2-7As shown, the sludge on base 140 contains a large amount of domestic sewage, kitchen waste, and other organic matter. This organic matter will continue to ferment in the anaerobic environment underground, producing harmful sulfur gases. These gases are usually dissolved in the interstitial water of the sludge or adsorbed on the surface of the sludge particles, remaining in a relatively stable, sealed state. However, during backwashing, the high-speed water flow from the spiral nozzle 280 violently stirs and disperses the sludge, disrupting its stable structure. This causes a large amount of dissolved and adsorbed toxic and harmful gases to be stripped off and released into the underground space. If not collected in time, the highly toxic hydrogen sulfide will threaten the lives of maintenance personnel, and the released gases will pollute the surrounding air, violating environmental emission requirements. Therefore, a gas sampling and collection device is added during backwashing of the sludge on base 140. The sampling and collection device includes cylinder 510, piston rod 520, and spring 53. 0. Cylinder 2 510 is fixed to box 250. Piston rod 2 520 is slidably connected to the inner wall of cylinder 2 510. Spring 2 530 is fixed between cylinder 2 510 and plate 252. The bottom end of piston rod 2 520 is fixed to plate 252. Pipe 9 540 is connected to the air inlet end of cylinder 2 510. Solenoid valve 2 550 is connected to pipe 9 540. Pipe 9 540 is located above the center of base 140. One-way valve is provided at the air inlet end of cylinder 2 510. When piston rod 1 420 moves up and down, it drives plate 252 to move up and down. At this time, piston rod 2 520 moves inside cylinder 2 510, thereby introducing the gas generated by backwashing through the channel of cylinder 2 510 to the air outlet end. The collected gas is then discharged from the air outlet end to the collection bag at the top of tank 100 (not shown in the attached figure).

[0052] Specifically, before sampling, the nozzle 280 can be controlled to agitate the sludge for a period of time, promoting gas generation and reaching a certain quantity. Then, the piston rod 420 is controlled to extend and retract, causing the piston rod 520 to extend and retract synchronously, thereby collecting the generated gas. Users can analyze the composition of the collected gas using professional equipment, and use this analysis as a basis for appropriate treatment of the gas in the subsequent tank 100.

[0053] As attached Figure 2-7As shown, a side plate 253 is fixed to the top edge of the plate 252, and a toothed structure is provided on one side of the side plate 253. A vibrating part 630 is slidably connected to the box 250, and a shaft 610 is rotatably connected inside it. A gear 620 is fixed to the outer wall of the shaft 610, and the gear 620 meshes with both the side plate 253 and the vibrating part 630. When the plate 252 moves upward, it synchronously drives the side plate 253 to move upward. At this time, the side plate 253 drives the gear 620 to rotate. The gear 620, through meshing with the vibrating part 630, causes the vibrating part 630 to move downward and insert into the silt on the base 140. The vibrating part 630 is equipped with a piezoelectric ceramic oscillator (not shown in the figure). When energized, the piezoelectric ceramic oscillator vibrates at a fixed frequency and transmits the vibration frequency signal to the PLC. The higher the density of the silt, the stronger the damping effect on the vibrating part 630, and the lower the vibration frequency. The system records the current vibration frequency in real time and compares it with the baseline frequency of "clear water / loose sludge" to calculate the sludge density value. Finally, the PLC controls whether to introduce sewage into the tank 410.

[0054] Specifically, a transmitter (not shown in the attached diagram) is installed on the top of the tank 100 to convert and transmit the signal emitted by the piezoelectric ceramic transducer to the PLC. Before detecting the sludge density, a sludge-free baseline value needs to be obtained. The vibrating unit 630 is completely immersed in clean water to simulate a sludge-free state. The piezoelectric ceramic transducer is energized, and the 4-20mA signal value and vibration frequency value output by the transmitter are recorded. This baseline value is written into the PLC program as a zero-point reference for density calculation. Next, three sludge samples from different locations in the intercepting well are collected, and the actual density is measured using a laboratory densitometer (e.g., 1.2g / cm³, 1.5g / cm³, and 1.8g / cm³). The samples are then placed in transparent containers, and the vibrating unit is placed in the container. 630 samples were inserted, and the frequency values ​​and 4-20mA signal values ​​corresponding to different densities were recorded. The corresponding "density-frequency" parameters were input into the transmitter to complete calibration (e.g., 1.5 g / cm³ corresponds to a frequency of 850 Hz and an output signal of 12mA). The measured sludge signal received by the PLC was converted into a sludge density value, and then the corresponding backwashing action was triggered according to the density threshold. More specifically, the PLC linkage logic was programmed as a closed-loop management of "density detection-backwashing control." The overall process was as follows: first, the 4-20mA standard electrical signal output by the transmitter was converted into a measured sludge density value using a linear formula; then, the corresponding backwashing action and associated mechanical linkage were triggered according to the density threshold. The signal conversion used a linear conversion formula. ,in The measured density of the silt (unit: g / cm³) is given. The value is set to 1.0 g / cm³ (corresponding to a 4mA signal output by the sensor, i.e., the minimum density in a state without silt / clear water). The value was set to 1.8 g / cm³ (corresponding to a 20mA signal output from the sensor, which is the maximum density of the sludge in its compacted state). This refers to the real-time output current value of the transmitter. The formula essentially utilizes the 16mA effective range of a 4-20mA signal, corresponding to a density range of 0.8g / cm³ (1.0-1.8g / cm³). By calculating the percentage difference between the actual current and the minimum current, the corresponding density value is converted, ensuring a linear correspondence between the signal and density. After the density value conversion is complete, the PLC executes a linkage action according to a preset threshold: when... When the concentration reaches ≥1.5 g / cm³ (caking threshold), backwashing is triggered, controlling solenoid valve 241 to operate and guide wastewater into nozzle 280. Simultaneously, wastewater is guided into cylinder 410, and the extension and retraction of piston rod 420 causes nozzle 280 to descend, thereby breaking up the caking sludge. More specifically, the transmitter, as the intermediate hub connecting the vibration unit 630 and the PLC control system, has the core function of acquiring, processing, converting, and stably transmitting signals. It first receives the real-time frequency signal of the vibration rod, which is related to the sludge density, from the built-in piezoelectric ceramic vibrator of the vibration unit 630. Then, it completes the calculation, conversion, and linearization processing through the built-in preset "vibration frequency-sludge density" calibration curve. Subsequently, it converts the converted density-related signal into a 4-20mA standard electrical signal that the PLC can directly recognize (4mA corresponds to 1.0 g / cm³, and 20mA corresponds to 1.8 g / cm³).

[0055] As attached Figure 1 , 8 As shown in Figure 9, a rod 710 is fixed to the top of the plate 252, a top seat 160 is fixed to the top of the tank 100, a box 161 is fixed to the top of the top seat 160, and a cylinder 720 is fixed inside the box 161. A disc 730 is rotatably connected to the inner wall of the cylinder 720, a rod sleeve 750 is fixed to the bottom of the disc 730, and a baffle 740 is fixed to the top of the cylinder 720. The surface of the disc 730 is painted half red and half green. When backflushing is finished, the plate 252 will drive the rod 710 to move upward. At this time, the rod 710 and the rod sleeve 750 are engaged, causing the rod sleeve 750 to rotate and drive the disc 730 to rotate synchronously. Under the shielding effect of the baffle 740, the green side of the disc 730 will be exposed, making it convenient for personnel going down into the well to observe the situation down there. The upper outer surface of the rod 710 has a spiral structure, and the inner bottom of the sleeve 750 has a groove that matches the spiral structure. When the rod 710 passes upward through the groove, the two mesh with each other, thereby driving the sleeve 750 to rotate. The working principle of the spiral structure and groove is similar to that of a rotating mop, and is existing technology, so it will not be described in detail here. Furthermore, the spiral structure and groove are not shown in the attached drawings.

[0056] A smart interception method for rainwater and sewage separation includes the following steps:

[0057] S100: Operating Condition Identification and Silt Density Detection

[0058] The PLC identifies the operating conditions based on signals from an external rainfall sensor and water quality monitoring signals within the tank (a water quality sensor can be used, but this application does not detail it; it is supplemented according to the conventional rainwater and sewage separation logic).

[0059] 1. Determination of sunny working conditions: There is no rainfall signal, and the water introduced into the pipe body 3130 is continuous sewage, confirming that it is in sunny working conditions.

[0060] 2. Rainy Day Condition Determination: When the rainfall signal reaches the set threshold, and indicators such as water turbidity and pollutant concentration tend to decrease with increasing rainfall, the system distinguishes between initial polluted rainwater and later clean rainwater. Simultaneously, the vibrating unit 630 is inserted into the sludge in the base 140, and the piezoelectric ceramic vibrator is energized and vibrates at a fixed frequency. The vibration signal is converted into a 4-20mA standard electrical signal by the transmitter and transmitted to the PLC. The PLC compares the signal with the preset threshold (1.5g / cm³ caking threshold) to determine whether backwashing needs to be initiated.

[0061] S200: Rainwater and sewage interception control based on operating conditions

[0062] Based on the S100 operating condition identification results, the PLC-linked gate completes the flow interception path control:

[0063] 1. Sunny Day Operation: Keep the gate of Pipe 1 110 closed and the gate of Pipe 2 120 open. Sewage is introduced into Tank 100 through Pipe 3 130 and discharged into the sewage network through Pipe 2 120, and transported to the sewage treatment plant for treatment. During this period, the sewage pump 200 is started and stopped as needed to discharge the water and a small amount of sludge in Tank 100 through Pipe 4 230 (second sewage discharge end) to improve the sewage discharge effect.

[0064] 2. Rainwater interception during rainy weather: In the initial rainwater stage (when water quality does not meet standards), the gate of pipe body 110 is kept closed and the gate of pipe body 2120 is kept open to intercept polluted rainwater into tank 100. After treatment, it is discharged into the sewage network through pipe body 2120. When the rainfall continues to increase, the water quality indicators meet the standards (become cleaner) and the rainfall exceeds the set threshold, the PLC controls the gate of pipe body 110 to open and the gate of pipe body 2120 to adjust to the appropriate opening degree. In the later stage, clean rainwater is directly discharged into natural water bodies through pipe body 110, realizing the separation of rainwater and sewage. During rainy weather, the filter screen 150 continuously blocks large impurities carried by rainwater to prevent them from entering the gate and pipe and causing blockage.

[0065] S300: Backwash Start-up and Sludge Disturbance Treatment

[0066] When the sludge density ρ calculated in S100 is ≥1.5 g / cm³ (caking threshold), the PLC triggers the backwashing program:

[0067] 1. Start the sewage pump 200, control solenoid valve 1 241 to open and solenoid valve 3 to open, and solenoid valve 4 to close. Sewage flows through pipe body 5 240, vortex separator 310 and pipe body 8 320 into cylinder body 1 410. The hydraulic pressure overcomes the compression force of spring 1 430 and the friction force of piston rod 1 420, pushing piston rod 1 420 downward, causing plate body 252 and nozzle 280 to extend out of bottom plate 251 until they are close to the surface of sludge (the extension height is dynamically adjusted according to the density value; the higher the density, the lower the extension).

[0068] 2. The sewage is distributed to the spiral nozzle 280 through the diversion of the pipe body 8 320; the sewage enters the spiral guide channel of the nozzle under pressure, and the high-speed rotation forms a strong rotating jet, which impacts the sludge in the base 140, breaks up the hardened mud clumps and suspends the sludge.

[0069] 3. The suspended sludge is sucked in again by the sewage pump 200. Part of it is discharged to the second sewage discharge end through the pipe body 230, and part of it is circulated to the pipe body 240 to continue to be disturbed by the nozzle 280, forming a closed loop backwash. During the backwashing process, the plate 252 drives the side plate 253 to move in the opposite direction, and drives the vibrating part 630 to move in the opposite direction through the meshing of the gear 620, thereby collecting the vibrating part 630.

[0070] S400: Backflushing gas collection and treatment

[0071] After the S300 backwash is started, the PLC synchronously controls the solenoid valve 550 to open, thus activating the gas sampling and collection function.

[0072] 1. When the plate 252 moves up and down, it synchronously drives the piston rod 2 520 to extend and retract within the cylinder 2 510. The cylinder 2 510 adsorbs toxic and harmful gases (such as hydrogen sulfide) generated by backwashing disturbance through the pipe 9 540 (located above the center of the base 140). The one-way valve prevents gas backflow.

[0073] 2. First, control nozzle 280 to stir the sludge for 3-5 minutes (to promote the full release and accumulation of gas), then use piston rod 2 520 to extend and retract to guide the collected gas into the collection bag at the top of tank 100 to complete gas sampling; after sampling, the gas composition can be analyzed by professional equipment, and targeted deodorization and purification treatment can be carried out to avoid threatening the safety of operation and maintenance personnel and polluting the environment.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent interception device for rainwater and sewage separation, characterized in that, include: The tank (100) has a base (140) fixed at the bottom and a top seat (160) fixed at the top. The outer side wall of the tank (100) is provided with a tube body one (110), a tube body two (120) and a tube body three (130). The inner side wall of the tank (100) is provided with a filter screen (150). A frame (210) is disposed on the top of the base (140), and a support block (220) is disposed on the frame (210). A sewage pump (200) is mounted on the support block (220) and is used to pump out sewage. A box body (250) is fixed to one side of the support block (220). A base plate (251) is fixed to the bottom end of the box body (250). A plate body (252) is slidably connected to the base plate (251). A pipe body seven (270) is provided on the plate body (252). A nozzle (280) is fixed to the bottom end of the pipe body seven (270). The diversion mechanism is disposed on the housing (250) and is used to introduce part of the sewage discharged by the sewage pump (200) into the nozzle (280) and discharge the other part, so that the nozzle (280) sprays the liquid to mix the sludge on the base (140).

2. The intelligent interception device for rainwater and sewage separation according to claim 1, characterized in that: The diversion mechanism includes: Pipe body six (260) is provided at the outlet end of the sewage pump (200), and pipe body four (230) and pipe body five (240) are provided on pipe body six (260). Solenoid valve one (241) is disposed on the pipe body five (240).

3. The intelligent interception device for rainwater and sewage separation according to claim 2, characterized in that: The liquid outlet end of the tube body five (240) is provided with a vortex separator (310), the liquid outlet end of the vortex separator (310) is provided with a tube body eight (320), the liquid outlet end of the tube body eight (320) is provided with a fitting (330), and the liquid outlet end of the fitting (330) is connected to the tube body seven (270) through a hose.

4. The intelligent interception device for rainwater and sewage separation according to claim 3, characterized in that: The nozzle (280) is a spiral nozzle.

5. The intelligent interception device for rainwater and sewage separation according to claim 4, characterized in that: A cylinder (410) is fixed on the box body (250). The inlet end of the cylinder (410) is connected to one of the outlet ends of the pipe (330). The pipe (330) is a four-way pipe. A piston rod (420) is slidably connected inside the cylinder (410). A spring (430) is fixed between the cylinder (410) and the plate (252). The spring (430) is sleeved on the outside of the piston rod (420). The bottom end of the piston rod (420) is fixed to the plate (252).

6. The intelligent interception device for rainwater and sewage separation according to claim 5, characterized in that: The cylinder body (410) is equipped with a solenoid valve three at the inlet end and a solenoid valve four at the outlet end.

7. The intelligent interception device for rainwater and sewage separation according to claim 6, characterized in that: The box body (250) is provided with a cylinder body two (510), and a piston rod two (520) is slidably connected to the inner side wall of the cylinder body two (510). The bottom end of the piston rod two (520) is fixed to the plate body (252). A spring two (530) is fixed between the cylinder body two (510) and the plate body (252). The air inlet end of the cylinder body two (510) is provided with a pipe body nine (540), and a solenoid valve two (550) is provided on the pipe body nine (540).

8. The intelligent interception device for rainwater and sewage separation according to claim 7, characterized in that: A side plate (253) is fixed to the top of the plate (252), a shaft (610) is rotatably connected inside the box (250), a gear (620) is fixed to the outer side wall of the shaft (610), and a vibrating part (630) is slidably connected to the box (250). The gear (620) meshes with the side plate (253) and the vibrating part (630) respectively.

9. A smart interception device for rainwater and sewage separation according to claim 8, characterized in that: A rod (710) is provided on the top of the plate (252), a box (161) is fixed on the top of the top seat (160), a cylinder (720) is provided inside the box (161) on the top of the top seat (160), a baffle (740) is fixed on the top of the cylinder (720), a disc (730) is rotatably connected to the inner side wall of the cylinder (720), a rod sleeve (750) is fixed at the bottom of the disc (730), and the rod sleeve (750) is engaged with the rod (710).

10. A smart interception method for rainwater and sewage separation, and a smart interception device for rainwater and sewage separation according to any one of claims 1-9, characterized in that, Includes the following steps: The PLC identifies the operating conditions based on the external rainfall sensor signal and the water quality monitoring signal inside the tank (100): if there is no rainfall signal and sewage is continuously introduced into the pipe (130), it is determined to be a sunny day; if the rainfall reaches the set threshold and the turbidity and pollutant concentration of the water decrease with the increase of rainfall, it is determined to be a rainy day and distinguishes between the initial polluted rainwater and the later clean rainwater; at the same time, the vibrating part (630) is inserted into the sludge in the base (140), the piezoelectric ceramic vibrator is energized and vibrates, and the signal is converted into a 4-20mA standard electrical signal by the transmitter and transmitted to the PLC. The PLC compares the calculated sludge density with the 1.5g / cm³ caking threshold to determine whether to start backwashing. The PLC controls the interception path of the gate according to the working conditions: On sunny days, the gate of pipe body one (110) is closed and the gate of pipe body two (120) is opened. After the sewage is introduced into the tank through pipe body three (130), it is discharged into the sewage network through pipe body two (120). The sewage pump (200) is started and stopped as needed. The accumulated water and a small amount of silt in the tank are discharged through pipe body four (230) to improve the sewage discharge effect. When the water quality does not meet the standards at the beginning of rainy days, the above gate status is maintained to intercept polluted rainwater. After the water quality meets the standards and the rainfall exceeds the threshold, the gate of pipe body one (110) is opened and the opening of the gate of pipe body two (120) is adjusted so that the clean rainwater can be directly discharged into the natural water body. The filter screen (150) blocks large impurities to prevent blockage. When the sludge density is 1.5 ≥ g / cm³, the PLC triggers backwashing: the sewage pump (200) is started, the solenoid valve one (241) is opened, the solenoid valve three is energized and the solenoid valve four is closed, and the sewage is introduced into the cylinder one (410) through the pipe body five (240), the vortex separator (310) and the pipe body eight (320). The hydraulic pressure pushes the piston rod one (420) to move down, driving the plate (252) and the nozzle (280) to extend out of the bottom plate (251) and close to the surface of the sludge; the sewage is diverted to the pipe body seven (270) through the pipe body eight (320), and the rotating jet formed by the spiral nozzle impacts the sludge to make it suspend. The suspended sludge is sucked in by the sewage pump (200) and partially discharged, and partially circulated and disturbed to form a closed loop. During backwashing, the plate body (252) drives the side plate (253) to move, and the vibration part (630) is collected by the gear (620).

Images