Vacuum intercepting well

Abstract

The invention relates to the technical field of municipal equipment, and discloses a vacuum catch basin which comprises a prefabricated well body and a vacuum branch pipe connected with a vacuum pump station, a grating is arranged in the well body and divides the well body into a water absorption area and an isolation area, the isolation area is provided with an overflow port, a sewage inlet and a rainwater inlet, the well body is provided with a valve chamber, and the valve chamber is communicated with the vacuum branch pipe. A control box, a first vacuum valve and a second vacuum valve are arranged in the valve chamber, one ends of the first vacuum valve and the second vacuum valve are connected with the vacuum branch pipe, and the other ends of the first vacuum valve and the second vacuum valve are connected with a water suction pipe extending to the bottom of the water suction area. According to the vacuum catch basin, the vacuum valve and the vacuum branch pipe are communicated with the vacuum pump station, active suction of sewage and initial rainwater is achieved through negative pressure suction of the vacuum pump station, the fluid conveying efficiency of negative pressure suction is higher, and the sewage and the initial rainwater can be rapidly guided into a treatment system; negative pressure suction of the vacuum pump station can be converted into forced drainage power, accumulated water drainage is actively accelerated, and urban waterlogging is effectively relieved.

Description

Technical Field

[0001] This application relates to the field of municipal equipment technology, and in particular to vacuum interception wells. Background Technology

[0002] Interception wells are used in combined sewer systems to separate rainwater and sewage. During the dry season, since there is only sewage in the pipes, the interception well can intercept the sewage and allow it to flow into the sewage pipes to the sewage treatment plant. During the rainy season, the initial rainwater and sewage are intercepted and flow into the sewage pipes. In the middle and later stages, the rainwater is discharged into natural water bodies through the outlets or open valves.

[0003] Existing interceptor wells are typically equipped with sewage pumps to extract sewage. Since sewage pumps have relatively high power, they require mains power lines, which increases the installation cost of the interceptor wells. At the same time, equipping each interceptor well with a sewage pump also significantly increases the production cost and subsequent maintenance cost of the interceptor wells.

[0004] Secondly, existing interception wells typically distinguish between initial rainwater and mid-to-late rainwater by dividing the time frame. When a rain gauge detects rain, it starts timing. Rainwater within a preset time is identified as initial rainwater, and a sewage pump draws it to a designated location. After the preset time, the corresponding sewage pump shuts off. As the rainwater level rises, it is discharged from the overflow outlet and then from the drainage outlet into natural waterways. However, different locations have different rainfall levels, varying degrees of street dirtiness, and different shut-off settings. It is difficult to accurately distinguish between the dirtier initial rainwater and mid-to-late rainwater using a preset time frame, thus limiting the effectiveness of the interception wells.

[0005] To better distinguish between initial and later-stage rainwater, some interception wells are equipped with water quality sensors. These sensors directly detect changes in water quality to differentiate between initial and later-stage rainwater. However, when exposed to sewage, these sensors are easily corroded and adhered to by substances in the sewage, affecting their actual effectiveness. Summary of the Invention

[0006] This application proposes a vacuum interception well, which is connected to a vacuum pumping station through a vacuum branch pipe and a vacuum pump. The negative pressure suction of the vacuum pumping station is used to actively extract sewage and initial rainwater. The fluid transport efficiency of negative pressure suction is higher, and sewage and initial rainwater can be quickly introduced into the treatment system. At the same time, when water accumulates in the area where the interception well is located, the negative pressure suction of the vacuum pumping station can be converted into forced drainage power to actively accelerate the discharge of accumulated water and effectively alleviate urban flooding.

[0007] To achieve the above objectives, this application adopts the following technical solution: a vacuum interception well, comprising a prefabricated well body and a vacuum branch pipe connected to a vacuum pump station. The well body is equipped with a grid, which divides the well body into a water intake zone and an isolation zone. The isolation zone is equipped with an overflow port, a sewage inlet, and a rainwater inlet. The well body is equipped with a valve chamber, which is equipped with a control box, a vacuum valve one, and a vacuum valve two. One end of both vacuum valve one and vacuum valve two is connected to the vacuum branch pipe, and the other end of both is connected to a water intake pipe extending to the bottom of the water intake zone. A liquid level sensor is provided in the water intake zone. The control box transmits information with the liquid level sensor and receives the opening and closing information of vacuum valve one and vacuum valve two.

[0008] The vacuum pump station has a control system and a collection tank. The control system is connected to a rain gauge and transmits information with the control box. The control box controls the opening and closing of vacuum valve one and vacuum valve two according to the monitoring data of the liquid level sensor and the instructions of the vacuum pump station control system.

[0009] Furthermore, the operating modes of the control box include:

[0010] In the cleaning / staining state, when the control box receives a high water level signal from the liquid level sensor, it sends an opening command to the vacuum valve; when the control box receives a low water level signal from the liquid level sensor, it sends a closing command to the vacuum valve.

[0011] In the initial rainwater collection state, when the control box receives a high water level signal from the liquid level sensor, it simultaneously sends an opening command to vacuum valve one and vacuum valve two. When the control box receives a low water level signal from the liquid level sensor, it simultaneously sends a closing command to vacuum valve one and vacuum valve two and returns to the cleaning state. After entering the initial rainwater collection state for time t1 or during this period, when a low initial rainwater content signal is received from the liquid level sensor, it simultaneously sends a closing command to vacuum valve one and vacuum valve two and switches to the closed state.

[0012] When the control box is in the off state, it no longer responds to the signal from the liquid level sensor.

[0013] Furthermore, when the control system receives a rainfall signal, it checks the operating mode of the control box. If the control box is in the cleaning state, it sends a command to the control box to switch to the initial rainwater collection state. When the control system receives the rainfall signal after a time t2, it checks the operating mode of the control box. If the control box is in the off state, it sends a command to the control box to switch to the cleaning state.

[0014] Furthermore, when the control box is in the cleaning state, if no low water level signal is received from the liquid level sensor after the control box sends an opening command to vacuum valve one for time t3, the control box sends an opening command to vacuum valve two. If no low water level signal is received from the liquid level sensor after the control box sends an opening command to vacuum valve two for time t4, the control box sends a closing command to vacuum valve one and vacuum valve two, switches to maintenance state, and sends a liquid level alarm signal to the vacuum pump station control system.

[0015] Furthermore, a float is provided on the rainwater inlet. When the water level is higher than the high water level detected by the water level sensor, the float closes due to buoyancy.

[0016] Furthermore, the liquid level sensor includes a high-water level sensor, which is provided with a liquid level chamber, an upper contraction chamber, and a lower contraction chamber from top to bottom. A telescopic air bladder filled with air is located at the top of the liquid level chamber. The upper and lower contraction chambers are fixedly connected, and the liquid level chamber is connected to the contraction chamber via a flexible tube. A telescopic sensing head is located in the upper contraction chamber, and a buoyancy sensing head is located in the liquid level chamber. The high-water level sensor is filled with immiscible liquids A and B. The density of liquid A is less than that of initial rainwater but greater than that of mid-to-late-stage rainwater, while the density of liquid B is less than that of water. Liquid A fills the lower contraction chamber, with the highest liquid level not exceeding the telescopic sensor head. Liquid B fills the upper contraction chamber, and the space from the lower end of the liquid level chamber to the buoyancy sensor head is sufficient to accommodate all of the liquid B in the telescopic sensor head. The upper volume of the buoyancy sensor head is insufficient to accommodate all of the liquid B. When liquid B submerges the buoyancy sensor head, the buoyancy sensor head generates a signal. The telescopic sensor head generates a signal when the upper contraction chamber is contracted to its limit. When the buoyancy sensor head generates a signal but the telescopic sensor head does not, a high water level signal is output. When both the buoyancy sensor head and the telescopic sensor head generate a signal, a low initial rainfall content signal is output.

[0017] Furthermore, the liquid level sensor also includes a low water level sensor, which includes a vertically arranged sensing cylinder with a liquid bladder at the lower end and an inflatable upper air bladder at the upper end. The sensing cylinder is connected to a sensing electrode with two electrode plates. The liquid bladder is filled with conductive liquid. When the two electrode plates are disconnected, a low water level signal is output.

[0018] Furthermore, the upper contraction chamber is connected to the lower contraction chamber via an extension tube, and the position of the lower contraction chamber corresponds to the low water level.

[0019] Furthermore, the upper contraction cavity includes a horizontally arranged support cylinder, both ends of which are provided with anti-fouling airbags, and both ends of the support cylinder are provided with telescopic bladders, with air filling the space between the telescopic bladders and the anti-fouling airbags.

[0020] Furthermore, the telescopic sensor head includes a sensor head located in the middle of the support cylinder, with a magnetic patch on one side of the telescopic bladder. When the telescopic bladder contracts to its limit, the sensor head senses the magnetic force of the magnetic patch and generates a signal. The buoyancy sensor head includes a mounting head that is mounted on the liquid level cavity from the side. A floating column is provided on the upper side wall of the buoyancy sensor head. When the floating column floats up, the buoyancy sensor head generates a signal.

[0021] The beneficial effects of this invention are as follows:

[0022] This application provides a vacuum interception well, which is connected to a vacuum pump station through a vacuum valve and a vacuum branch pipe. The vacuum pump station uses suction to draw in sewage and initial rainwater. On the one hand, each interception well no longer needs to be equipped with a sewage pump, nor does it need to be connected to the mains power line for the sewage pump, thus reducing the manufacturing, installation and maintenance costs of the interception well. On the other hand, compared with natural flow, the vacuum pump station has higher suction efficiency, and when water accumulation occurs, it can use suction to force drainage and actively drain waterlogged areas.

[0023] Because the initial rainwater and sewage contain a large amount of dissolved pollutants, their density is significantly higher than that of the middle and later rainwater. The level of sewage and initial rainwater is detected by the rising of liquid B, which has a density less than water. The change of the liquid surface of initial rainwater is judged by the change of liquid A, which has a density slightly greater than that of the middle and later rainwater but less than that of sewage and initial rainwater. It can adapt to the external environment and assist the interception well in playing the role of separating clean and dirty water.

[0024] Since the buoyancy sensor, telescopic sensor, and sensing electrode are all located in a relatively enclosed inner cavity, the environment inside the cavity is significantly higher than the external sewage environment, which can effectively prevent corrosion or adhesion by impurities in the sewage and improve reliability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0026] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0027] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0028] Figure 3 This is a control structure diagram of Embodiment 1 of the present invention;

[0029] Figure 4 This is a front view of Embodiment 2 of the present invention;

[0030] Figure 5 This is a three-dimensional schematic diagram of the high water level sensor in Embodiment 2 of the present invention;

[0031] Figure 6 This is a front view of the high water level sensor in Embodiment 2 of the present invention;

[0032] Figure 7 This is a schematic diagram of the high water level sensor in Embodiment 2 of the present invention (without the support frame).

[0033] Figure 8 This is a cross-sectional view of the upper contraction chamber and the liquid level chamber in Embodiment 2 of the present invention;

[0034] Figure 9 This is a front view of the low water level sensor in Embodiment 2 of the present invention;

[0035] Figure 10 This is a schematic diagram of the upper contraction cavity in Embodiment 2 of the present invention;

[0036] Figure 11 This is a schematic diagram of the buoyancy sensing head in Embodiment 2 of the present invention.

[0037] In the diagram: 1. Intake zone; 2. Isolation zone; 3. Overflow outlet; 4. Sewage inlet; 5. Rainwater inlet; 6. Grille; 7. Cleaning outlet; 8. Valve chamber; 9. Vacuum branch pipe; 10. Low water level sensor; 1001. Induction cylinder; 1002. Liquid bladder; 1003. Induction electrode; 1004. Upper air bladder; 11. High water level sensor; 1101. Lower contraction chamber; 1102. Upper contraction chamber; 1103. Liquid level chamber; 1104. 1105. Telescopic airbag; 1106. Buoyancy sensor head; 1107. Telescopic sensor head; 1108. Hose; 1109. Extension tube; 11000. Support frame; 11021. Support cylinder; 11022. Telescopic airbag; 11023. Anti-fouling airbag; 11051. Mounting head; 11052. Floating column; 11061. Sensor head; 11062. Magnetic patch; 12. Float valve; 13. Water level sensor; 14. Suction pipe. Detailed Implementation

[0038] 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.

[0039] Example 1, please refer to Figures 1-2The vacuum interception well includes a prefabricated integrated well body and a vacuum branch pipe 9 connected to a vacuum pump station. The vacuum pump station has a control system and a collection tank. A grid 6 is provided in the middle of the well body, which divides the well body into an isolation zone 2 and a water absorption zone 1. A cleaning port 7 is provided at the top of the well body, located on the side corresponding to the isolation zone 2. During cleaning, the spilled garbage remains in the isolation zone 2 and will not contaminate the relatively clean water absorption zone 1. In this embodiment, the well body is a horizontal cylindrical tank and the grid 6 is circular. Two water inlets are provided at the end of the isolation zone 2, namely a sewage inlet 4 and a rainwater inlet 5. The sewage inlet 4 is connected to the urban sewage pipeline. Next, the rainwater inlet 5 is connected to the rainwater pipeline. If the city has a combined rainwater and sewage pipeline, the combined rainwater and sewage pipeline is connected to the rainwater inlet 5, and the sewage inlet 4 is sealed with a plug. Rainwater or sewage enters the isolation zone 2 through the inlet, and then flows into the water intake zone 1 through the grille 6. The grille 6 blocks and isolates leaves and larger solid waste. An overflow outlet 3 is provided on the side of the isolation zone 2. The overflow outlet 3 is connected to the natural water body. After the well body is buried, when the water level in the well body is high, the liquid level is lower than the design height of the city rainwater pipeline to discharge into the natural water body. Rainwater first flows into the well body. When the well body stops receiving rainwater, the rainwater is discharged from the original discharge outlet.

[0040] The well body is equipped with a valve chamber 8, which contains two vacuum valves, namely vacuum valve one and vacuum valve two. Vacuum valve one and vacuum valve two are both connected to vacuum branch pipes 9. The front end of the vacuum valve is equipped with a water suction pipe 14, which extends into the bottom of the water suction area 1. A liquid level sensor is also provided in the water suction area 1. In this embodiment, the liquid level sensor is a water level sensor 13. The water level sensor 13 detects the water level through a float or electrode, which is a mature application. The structure of the water level sensor 13 will not be described in detail in this embodiment. The vacuum valve is connected to a control box. The control box receives the monitoring data of the liquid level sensor and communicates with the control system. The communication method can be 4G / 5G or wired. The control box sends the opening and closing data of the two vacuum valves to the control system and receives the instructions issued by the control system.

[0041] The control box controls the opening and closing of the vacuum valve based on the monitoring data from the liquid level sensor and the instructions from the vacuum pump station control system. The vacuum pump station is connected to a rain gauge, which transmits rainfall information to the vacuum pump station control system. When it is not raining and the control system does not receive a rainfall signal from the rain gauge, the control box remains in a clean state. At this time, when the liquid level sensor detects that the sewage has reached a high water level, it sends a signal to the control box. When the control box receives the high water level signal from the water level sensor 13, it sends a command to the vacuum valve 1, causing the vacuum valve 1 to open. Sewage is drawn in through the vacuum valve 1 and flows into the collection tank of the vacuum pump station through the vacuum branch pipe 9. When the control box receives the low water level signal from the water level sensor 13, it sends a closing command to the vacuum valve 1, causing the vacuum valve 1 to close to prevent air from being drawn in and increasing the burden on the vacuum pump station.

[0042] When it starts to rain, the rain gauge detects the rainfall signal. When the control system receives the rainfall signal, it checks the operating status of the control box. If the control box is in cleaning mode, it sends a command to the control box to switch to the initial rainwater collection mode. At this time, when the control box receives a high water level signal from the water level sensor 13, it sends a command to vacuum valves one and two simultaneously, causing them to open and increasing suction, allowing the initial rainwater to flow quickly into the collection tank of the vacuum pump station. If it is a brief shower, the rainwater level in the well will drop rapidly. When the control box receives a low water level signal from the level sensor, it sends a closing command to vacuum valves one and two and returns to normal. In the cleanup state, to prevent the vacuum valve from sucking in a large amount of air, after the control system receives the rainfall signal for a preset time t1, it sends a shutdown command to the control box. The control box switches to the shutdown state and no longer responds to the signal from the water level sensor 13. At the same time, the control box sends a shutdown command to the vacuum valve, and vacuum valves one and two close. t1 is generally about 15 minutes. At this time, the initial rainwater has been sucked into the collection tank. The rainwater in the middle and later stages continues to flow into the isolation zone 2, and the water level in the well rises. When it rises to a certain height, the rainwater flows from the overflow outlet 3 to the natural water body, or no longer flows in through the sewage inlet 4. The rainwater is discharged into the natural water body through the city's preset discharge outlet.

[0043] When the control box is in the closed state, after the rainfall signal disappears for time t2, the control system sends a command to the vacuum valve to switch the control box to the cleaning state. At this time, due to the large amount of rainwater in the well, the water level sensor 13 sends a high water level signal to the control box. When the control box receives the high water level signal, it sends an opening command to the vacuum valve 1. The vacuum valve 1 then draws in the residual rainwater in the well. When the control box receives the low water level signal, it sends a closing command to the vacuum valve 1. The vacuum valve 1 then closes and enters the normal working state.

[0044] When the control box is in cleaning mode, if no low water level signal is received from water level sensor 13 after the control box sends an opening command to vacuum valve 1 for time t3, it indicates that the inflow of sewage is greater than the suction capacity of vacuum valve 1, and the sewage is increasing. To prevent the sewage level from being too high and flowing out of overflow port 3 and polluting the environment, the control box switches to high-efficiency cleaning mode and sends an opening command to vacuum valve 2 to increase the sewage suction speed. When the sewage level drops, if the control box still does not receive a low water level signal from water level sensor 13 after time t4 in high-efficiency cleaning mode, the control box sends a closing command to vacuum valve 1 and vacuum valve 2. When both vacuum valve 1 and vacuum valve 2 are open, the sewage suction speed is much greater than the sewage inflow speed. If no low water level signal is received from water level sensor 13 after time t4 in high-efficiency cleaning mode, it indicates that there is a fault in water level sensor 13, vacuum valve, or pipeline, and the control box switches to maintenance mode. The control box sends a closing command to vacuum valve 1 and vacuum valve 2, and at the same time sends a liquid level alarm signal to the vacuum pump station control system.

[0045] For areas prone to water accumulation or areas already experiencing flooding, the vacuum pump station sends a drainage command to the control box of the corresponding area. The vacuum box then sends an opening command to vacuum valves one and two to force drainage of the area and reduce water accumulation.

[0046] A float ball 12 is installed on the rainwater inlet 5. When the water level is higher than the high water level detected by the water level sensor 13, the float ball 12 closes under buoyancy. When the initial rainwater is sucked away, as the liquid level increases, the water level sensor 13 floats and gradually closes the rainwater inlet 5. That is, as the discharge volume of the initial rainwater increases, its inflow velocity gradually decreases, so that the suction velocity is greater than the inflow velocity of the initial rainwater. This controls the inflow volume of the initial rainwater and prevents the initial rainwater from flowing in too fast, exceeding the suction velocity, so that the initial rainwater overflows from the overflow port 3. When the vacuum valve stops suctioning, the rainwater inlet 5 is completely closed, and the rainwater in the middle and later stages is directly discharged from the city drainage outlet, preventing the rainwater from washing debris into the isolation zone 2.

[0047] In Example 2, compared to Example 1, on the one hand, the water level sensor 13 is directly exposed to sewage, making it susceptible to corrosion and damage. On the other hand, rainfall is monitored by a rain gauge, and vacuum valves 1 and 2 are closed after rainfall time t1. However, the vacuum pump station and the intercepting well are relatively far apart, which may cause signal loss or delay, resulting in vacuum valves 1 and 2 failing to close in time, increasing the burden on the collection tank. Furthermore, the time-based division of initial and later-stage rainfall is too coarse. Therefore, Example 2 optimizes the water level sensor based on Example 1. Please refer to [link to example]. Figures 3-6The liquid level sensor includes a high water level sensor 11. The high water level sensor 11 has, from top to bottom, a liquid level chamber 1103, an upper contraction chamber 1102, and a lower contraction chamber 1101. A telescopic air bladder 1104, filled with air, is located at the top of the liquid level chamber 1103 to regulate the pressure within the high water level sensor 11. The upper contraction chamber 1102 is fixedly connected to the lower contraction chamber 1101. The liquid level chamber 1103 is connected to the upper contraction chamber 1102 via a flexible hose 1107. A telescopic sensing head 1106 is located in the upper contraction chamber 1102, and a buoyancy sensing head 1105 is located in the liquid level chamber 1103. The high water level sensor 11 is filled with two immiscible liquids with densities close to water. Liquid A has a density less than that of initial rainwater but greater than that of mid-to-late-stage rainwater; for example, a density between 1000.05 and 1. A sodium chloride solution with a density between 0.000.1 kg / m³ is used. Liquid B has a density slightly less than that of water, such as edible olive oil. Olive oil is immiscible with water and does not dissolve sodium chloride. Under normal circumstances, liquid A fills the lower contraction chamber 1101, with the highest liquid level not exceeding the telescopic sensor head 1106. Liquid B fills the upper contraction chamber 1102, with its liquid level higher than the telescopic sensor head 1106. The space from the lower end of the liquid level chamber 1103 to the buoyancy sensor head 1105 can accommodate all of the liquid B in the telescopic sensor head 1106. The upper volume of the buoyancy sensor head 1105 is insufficient to accommodate all of the liquid B. The buoyancy sensor head 1105 can sense buoyancy. When liquid B submerges the buoyancy sensor head 1105, the buoyancy sensor head 1105 receives a signal. The telescopic sensor head 1106 receives a signal when the upper contraction chamber 1102 is contracted to its limit.

[0048] Under natural conditions, liquid A is in the lower contraction chamber 1101, and most of liquid B is in the upper contraction chamber 1102. The gravity of liquid B causes the upper contraction chamber 1102 to expand. The telescopic sensor 1106 has no signal, and the buoyancy sensor 1105 has no signal. At this time, no signal is output, which is the initial state.

[0049] When the well contains sewage or initial rainwater, its density is greater than that of liquid A and liquid B. As the water level rises, the liquid in the high water level sensor 11 rises along with the liquid level. When the liquid level rises to the position of the buoyancy sensor head 1105, the liquid level of liquid B also rises to the position of the buoyancy sensor head 1105, so that the buoyancy sensor head 1105 has a signal. That is, when the buoyancy sensor head 1105 has a signal and the telescopic sensor head 1106 has no signal, a high water level signal is output.

[0050] During rainfall, as the precipitation continues, the amount of dissolved pollutants in the rainwater decreases, and the density of the sewage gradually decreases from top to bottom. The high-density interface gradually decreases, and when the interface decreases to the position of the lower contraction chamber 1101, liquid A, due to its relatively high density, gradually flows back into the lower contraction chamber 1101. The upper contraction chamber 1102 and the hose 1107 contract to accommodate the backflow of liquid A, while liquid B is mainly in the liquid level chamber 1103. The hose 1107 is completely flattened and isolates liquid A and liquid B. As liquid A continues to flow back, the upper contraction chamber 1102 contracts to its limit, and the buoyancy sensor 1105 outputs a signal. That is, when the buoyancy sensor 1105 has a signal and the telescopic sensor 1106 has a signal, it is determined that the initial rainwater has been discharged to a low water level, and a low initial rainwater content signal is output. When the control box receives the low initial rainwater content signal, it switches to the off state.

[0051] Please see Figure 1 , Figure 3 and Figure 7 To detect whether sewage or rainwater has been discharged to a low water level, the liquid level sensor also includes a low water level sensor 10. A high water level sensor 11 is mounted on the side wall of the well body via a support frame 1109. The side wall of the well body is provided with a corresponding mounting plate, which is located at a position where the water flow is relatively small. The low water level sensor 10 includes a sensing cylinder 1001 fixedly connected to the support frame 1109. The lower end of the sensing cylinder 1001 is provided with a liquid bladder 1002, and the upper end is provided with an inflatable upper air bladder 1004. The sensing cylinder 1001 is connected to a sensing electrode 1003, which has two electrode plates. The liquid bladder 1002 is filled with conductive liquid. When the water level reaches the position of the sensing electrode 1003, the conductive liquid submerges the sensing electrode 1003, and the two electrode plates are connected. The installation position of the low water level sensor 10 corresponds to the low water level. When the two electrode plates are disconnected, a low water level signal is output.

[0052] In order for the telescopic sensor head 1106 to respond only when the initial rainwater drops to a low water level, the upper contraction chamber 1102 is connected to the lower contraction chamber 1101 through the extension pipe 1108, and the position of the lower contraction chamber 1101 corresponds to the low water level.

[0053] Please see Figure 8 The upper contraction chamber 1102 includes a support cylinder 11021. The shape of the support cylinder 11021 is not affected by pressure. The support cylinder 11021 is placed horizontally. Both ends of the support cylinder 11021 are provided with anti-fouling airbags 11023. Both ends of the support cylinder 11021 are provided with telescopic bladders 11022. The space between the telescopic bladders 11022 and the anti-fouling airbags 11023 is filled with air. Under water pressure, the telescopic bladders 11022 contract inward. At the same time, under the obstruction of the anti-fouling airbags 11023, mud or other pollutants will not enter the inner cavity of the support cylinder 11021 and interfere with the telescopic bladders 11022, so that the telescopic bladders 11022 can fully contract and expand.

[0054] The telescopic sensor head 1106 includes a sensor head 11061 located in the middle of the support cylinder 11021. A magnetic patch 11062 is provided on one side of the telescopic bladder 11022. When the telescopic bladder 11022 is contracted to its limit, the sensor head 11061 senses the magnetic force of the magnetic patch 11062, causing the telescopic sensor head 1106 to generate a signal.

[0055] Please see Figure 5 and Figure 9 The buoyancy sensor 1105 includes a mounting head 11051, which is mounted on the liquid level cavity 1103 from the side. The upper side wall of the buoyancy sensor 1105 is provided with a floating column 11052, which floats vertically. When liquid B enters and submerges the floating column 11052, the floating column 11052 floats up, and the circuit between the floating column 11052 and the mounting head 11051 is connected or disconnected, generating a signal.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum interception well, comprising a prefabricated well body and a vacuum branch pipe (9) connected to a vacuum pump station, wherein a grid (6) is provided inside the well body, the grid (6) dividing the well body into a water intake zone (1) and an isolation zone (2), the isolation zone being provided with an overflow outlet (3), a sewage inlet (4) and a rainwater inlet (5), characterized in that: The well body is provided with a valve chamber (8), and the valve chamber (8) is provided with a control box, vacuum valve one and vacuum valve two. One end of vacuum valve one and vacuum valve two are connected to a vacuum branch pipe (9), and the other end is connected to a suction pipe (13) extending to the bottom of the suction area (1). The suction area (1) is provided with a liquid level sensor. The control box transmits information with the liquid level sensor and receives the opening and closing information of vacuum valve one and vacuum valve two. The vacuum pump station has a control system and a collection tank. The control system is connected to a rain gauge. The control system transmits information with the control box and can issue commands to switch the working mode of the control box. The control box controls the opening and closing of vacuum valve one and vacuum valve two according to the working mode and the monitoring data of the liquid level sensor.

2. The vacuum interception well according to claim 1, characterized in that, The operating modes of the control box include: In the cleaning / staining state, when the control box receives a high water level signal from the liquid level sensor, it sends an opening command to the vacuum valve; when the control box receives a low water level signal from the liquid level sensor, it sends a closing command to the vacuum valve. In the initial rainwater collection state, when the control box receives a high water level signal from the liquid level sensor, it simultaneously sends an opening command to vacuum valve one and vacuum valve two. When the control box receives a low water level signal from the liquid level sensor, it simultaneously sends a closing command to vacuum valve one and vacuum valve two and returns to the cleaning state. After entering the initial rainwater collection state for time t1 or during this period, when a low initial rainwater content signal is received from the liquid level sensor, it simultaneously sends a closing command to vacuum valve one and vacuum valve two and switches to the closed state. When the control box is in the off state, it no longer responds to the signal from the liquid level sensor.

3. The vacuum interception well according to claim 2, characterized in that, When the control system receives a rainfall signal, it checks the operating mode of the control box. If the control box is in the cleaning state, it sends a command to the control box to switch to the initial rainwater collection state. After the rainfall signal received by the control system disappears for time t2, it checks the operating mode of the control box. If the control box is in the off state, it sends a command to the control box to switch to the cleaning state.

4. The vacuum interception well according to claim 3, characterized in that, When the control box is in the cleaning state, after the control box sends an opening command to vacuum valve one for time t3, if it still does not receive a low water level signal from the level sensor (13), the control box sends an opening command to vacuum valve two. After the control box sends an opening command to vacuum valve two for time t4, if it still does not receive a low water level signal from the level sensor (13), the control box sends a closing command to vacuum valve one and vacuum valve two, switches to maintenance state, and sends a level alarm signal to the vacuum pump station control system.

5. The vacuum cutoff well according to claim 2, characterized in that, The rainwater inlet (5) is equipped with a float (12). When the water level is higher than the high water level detected by the water level sensor (13), the float (12) closes under buoyancy.

6. The vacuum cutoff well according to claim 2, characterized in that, The liquid level sensor includes a high water level sensor (11). The high water level sensor (11) is provided with a liquid level chamber (1103), an upper contraction chamber (1102), and a lower contraction chamber (1101) from top to bottom. A telescopic airbag (1104) is provided at the top of the liquid level chamber (1103), and the telescopic airbag (1104) is filled with air. The upper contraction chamber (1102) and the lower contraction chamber (1101) are fixedly connected. The liquid level chamber (1103) is connected to the contraction chamber (1102) through a hose (1107). A telescopic sensing head (1106) is provided in the upper contraction chamber (1102), and a buoyancy sensing head (1105) is provided in the liquid level chamber (1103). The high water level sensor (11) is filled with immiscible liquids A and B. The density of liquid A is less than that of the initial rainwater and greater than that of the middle and later rainwater. Liquid B... The density of liquid A is less than that of water. Liquid A fills the lower contraction chamber (1101), and the highest liquid level does not exceed the telescopic sensor head (1106). Liquid B fills the upper contraction chamber (1102), and the space from the lower end of the liquid level chamber (1103) to the buoyancy sensor head (1105) can accommodate all of the liquid B in the telescopic sensor head (1106). The upper volume of the buoyancy sensor head (1105) is insufficient to accommodate all of the liquid B. When liquid B submerges the buoyancy sensor head (1105), the buoyancy sensor head (1105) has a signal. The telescopic sensor head (1106) has a signal when the upper contraction chamber (1102) is contracted to its limit. When the buoyancy sensor head 1105 has a signal and the telescopic sensor head 1106 has no signal, a high water level signal is output. When the buoyancy sensor head 1105 has a signal and the telescopic sensor head 1106 has a signal, a low initial rainwater content signal is output.

7. The vacuum cutoff well according to claim 6, characterized in that, The liquid level sensor also includes a low water level sensor (10), which includes a vertically arranged sensing cylinder (1001). The lower end of the sensing cylinder (1001) is provided with a liquid bladder (1002), and the upper end is provided with an inflatable upper air bladder (1004). The sensing cylinder (1001) is connected to a sensing electrode (1003), which has two electrode plates. The liquid bladder (1002) is filled with conductive liquid. When the two electrode plates are disconnected, a low water level signal is output.

8. The vacuum interception well according to claim 6, characterized in that, The upper contraction chamber (1102) is connected to the lower contraction chamber (1101) via an extension pipe (1108), and the position of the lower contraction chamber (1101) corresponds to the low water level.

9. The vacuum cutoff well according to claim 6, characterized in that, The upper contraction cavity (1102) includes a horizontally arranged support cylinder (11021), both ends of which are provided with anti-fouling airbags (11023), and both ends of the support cylinder (11021) are provided with telescopic bladders (11022), and air is filled between the telescopic bladders (11022) and the anti-fouling airbags (11023).

10. The vacuum cutoff well according to claim 9, characterized in that, The telescopic sensor head (1106) includes a sensor head (11061) located in the middle of the support cylinder (11021). A magnetic patch (11062) is provided on one side of the telescopic bladder (11022). When the telescopic bladder (11022) is contracted to its limit, the sensor head (11061) senses the magnetic force of the magnetic patch (11062) and generates a signal. The buoyancy sensor head (1105) includes a mounting head (11051). The mounting head (11051) is installed on the liquid level cavity (1103) from the side. A floating column (11052) is provided on the upper side wall of the buoyancy sensor head (1105). The floating column (11052) floats up after the buoyancy sensor head (1105) floats up and generates a signal.

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