CN109339190A - An anti-backflow method and system applied to a discharge outlet - Google Patents
An anti-backflow method and system applied to a discharge outlet Download PDFInfo
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- CN109339190A CN109339190A CN201811280535.3A CN201811280535A CN109339190A CN 109339190 A CN109339190 A CN 109339190A CN 201811280535 A CN201811280535 A CN 201811280535A CN 109339190 A CN109339190 A CN 109339190A
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- well
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
- E03F5/105—Accessories, e.g. flow regulators or cleaning devices
- E03F5/107—Active flow control devices, i.e. moving during flow regulation
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention discloses a kind of anti-down irrigation method applied in row's mouth, the outer liquidometer of liquidometer, well is used to liquid level information H2 outside liquid level information H1 in collected well and well being transferred to the controller in well, controller is used for the relationship according to liquid level information H2 outside liquid level information H1 in the well and the well, control control valve events；As liquid level information H1 in liquid level information H2 >=well outside well, execute reverse-filling program: the control valve events, first pneumatic cut-off equipment inflation, the first outlet pipe close to prevent the fluid in the natural water or rain pipe that are connected with first outlet pipe from flowing backward by the first outlet pipe into row's mouth well；As liquid level information H1 in liquid level information H2 < well outside well, reverse-filling program is exited.
Description
Technical Field
The invention relates to the field of municipal engineering, in particular to a backflow preventing method and system applied to a drain port.
Background
At present in reposition of redundant personnel well, abandon a class well and vatch basin system, its system all comprises inlet tube, outlet pipe and intercepting dirty pipe, and the device that uses of preventing flowing backward all uses gate or weir door to carry out the preventing flowing backward that corresponds the outlet pipe, and the power supply of gate valve is electricity or hydraulic pressure. However, in reality, the following problems exist in the electric control: 1. flammable and explosive biogas is generally generated in a closed pipeline and a sewage environment, and a general electric control device is easy to explode and unsafe, so that an electric control part in contact with the biogas is required to have an explosion-proof function when the electric control device is applied, and therefore, an electric control system is expensive and high in cost; 2. under the environment of severe stormy weather, the condition of power failure can occur, and equipment in a drainage well, a flow abandoning well or a closure well cannot work normally after the power failure, so that the conditions of urban waterlogging and the like can occur; 3. under the condition of heavy rain, the flooding conditions of the drainage well, the abandoning well and the intercepting well are between hours and days, so that the redundancy and the cost are too high by adopting an electric control device which is completely suitable for underwater use, and the flooding capacity of the common electric control device with the IP68 grade is insufficient within hours; 4. the device of the electric control system uses non-safe voltage, and the high voltage is unsafe and easy to have accidents; 5. after the electrical equipment is flooded, the electric leakage is easy to occur, and the electric shock danger exists; 6. the electric control equipment (a gate and a weir gate) needs an upward or downward stroke during operation, the urban ground is exposed, the urban landscape beautiful traffic is influenced, and the excavation area is large during construction; 7. the electric control system uses 380V three-phase power, and a municipal power grid cannot supply power, so that the problem of difficulty in power supply is solved.
Particularly, for the occasion requiring the concealed installation, the power supply and the generated cost of the electric control system are not easy to be solved. Hydraulic control also has certain problems: the hydraulic station uses a high-pressure oil pipe, and the cost of the hydraulic station and the high-pressure oil pipe is high; the high-pressure oil pipe is broken and leaks oil to pollute the environment; after the electrical equipment is flooded, the electric leakage is easy to occur, and the electric shock danger exists; the electric control equipment (the gate and the weir gate) needs an upward or downward stroke during operation, the urban ground is exposed, the urban landscape beautiful traffic is influenced, and the excavation area is large during construction.
Besides the problems of the used equipment of the existing intercepting well, drainage well or abandoning well, the existing intercepting well, drainage well or abandoning well can not accurately shunt and discharge sewage and rainwater, has potential safety hazards, and is easy to cause urban waterlogging because water of spontaneous combustion water flows back into the well body.
Disclosure of Invention
In order to solve the problems, the invention provides a backflow preventing method applied to a drain port, which is safe and reliable and can accurately perform sewage and rainwater splitting.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a backflow preventing method applied to a drain port comprises the following steps:
collecting liquid level information H1 in the diversion well and liquid level information H2 outside the diversion well in real time,
when the liquid level information H2 outside the well is not less than the liquid level information H1 in the well, executing a backflow preventing program: the first control valve acts, the first pneumatic cut-off device is inflated, and the first water outlet pipe is closed to prevent the fluid in the natural water body or the rainwater pipe connected with the first water outlet pipe from flowing backwards into the drainage well through the first water outlet pipe;
and when the liquid level information H2 outside the well is less than the liquid level information H1 in the well, the backflow preventing program is exited.
On the basis of the scheme, a backflow prevention water level H corresponding to the elevation of the bottom of the first water outlet pipe is also arranged,
when H2 is more than or equal to H and H2 is more than or equal to H1, executing a backflow preventing program;
and when H2 is less than H, the backflow preventing program is exited.
On the basis of the scheme, when H2 is H1, the controller acts, the first pneumatic cut-off device starts to inflate, the first water outlet pipe starts to close gradually, and then,
if H2 is not less than H1, the first pneumatic cut-off device continuously inflates until the first water outlet pipe is cut off;
if H2 < H1, the first pneumatic cut-off device is deflated, and the first water outlet pipe is opened.
On the basis of the scheme, the backflow preventing system applied to the drain port comprises:
a compressed gas source for providing compressed gas;
the gas conveying pipe is communicated with the outlet of the compressed gas source and is used for conveying compressed gas;
the control valves are arranged on the corresponding gas conveying pipes;
the controller is connected with the control valve and is used for controlling the control valve to act; and
the well is arranged at the mouth of the well,
the discharge well comprises a discharge well body, a pneumatic cut-off device and an in-well liquid level meter arranged in the discharge well body,
the drainage well body is provided with a water inlet and at least one water outlet which is a first water outlet, the first water outlet is connected with a natural water body or a rainwater pipe through a first water outlet pipe, the first water outlet pipe is provided with the pneumatic cut-off device, namely a first pneumatic cut-off device,
an outdoor liquid level meter is arranged outside the discharge well body at the downstream of the first water outlet pipe,
the liquid level meter in the well, the liquid level meter outside the well and the control valve are respectively connected with the controller by signals,
the controller is used for controlling the action of the first control valve according to the relation between the well liquid level information H1 and the well liquid level information H2.
On the basis of the scheme, the system comprises the following steps:
the form of the discharge well is a second form, a second outlet is further arranged on the discharge well body, the second outlet is connected with a sewage pipe or a sewage treatment facility or a regulation pool or a primary rain pipe or an initial rainwater treatment facility through a second water outlet pipe, a second pneumatic cut-off device is arranged on the second water outlet pipe, the control valve comprises a first control valve and a second control valve, the first pneumatic cut-off device and the second pneumatic cut-off device are connected with the compressed air source through a gas conveying pipeline, the first control valve is used for controlling the charging and discharging of the first pneumatic cut-off device, the second control valve is used for controlling the charging and discharging of the second pneumatic cut-off device, and the first control valve and the second control valve are respectively and electrically connected with the controller;
the form of row's mouth well is form three, still be equipped with second export and third export on arranging the mouth body, the second export links to each other with sewage pipe or sewage treatment facility or regulation pond through the second outlet pipe, the third export links to each other with just rain pipe or initial stage rainwater treatment facility or regulation pond through the third outlet pipe, just correspond respectively on second, the third outlet pipe and be equipped with second, the pneumatic cut-off equipment of third, the pneumatic cut-off equipment of second, third pass through gas delivery pipeline with compressed air source links to each other, the control valve includes first, second, third control valve, and first, second, third control valve are used for controlling respectively first, second, the pneumatic cut-off equipment of third fill, gassing, just first, second, third control valve respectively with the controller electricity is connected.
On the basis of the scheme, the system also comprises
The measuring instrument comprises one or more of a rain gauge, a flow meter, a water gauge and a timer,
correspondingly, the measurement information comprises one or more of rainfall, instantaneous flow, accumulated flow and rainfall time.
On the basis of the scheme, when the drainage well is only provided with the first outlet and the backflow preventing program exits, the controller controls the first control valve to act, the first pneumatic cut-off device is deflated, and the first outlet is communicated.
On the basis of the scheme, the system comprises the following steps:
wherein the pneumatic cut-off device is an air bag or a pneumatic pipe clamp valve,
the air bag is provided with an air inlet which is connected with the gas conveying branch pipe;
the pneumatic pinch valve also has a gas inlet that is connected to the gas delivery manifold.
On the basis of the scheme, the system comprises the following steps:
the first pneumatic cut-off device is arranged at the starting end of the first water outlet in the diversion well, or on a pipeline between the diversion well and the discharge port, or at the discharge port;
and/or the second pneumatic cut-off device is arranged in the shunt well and positioned at the starting end of the second water outlet or on the pipeline of the second water outlet pipe;
and/or the third pneumatic cut-off device is arranged at the starting end of the third water outlet or on the pipeline of the third water outlet pipe in the shunt well.
On the basis of the scheme, the error value H0 exists in the well liquid level information H1 and the well liquid level information H2.
The invention has the advantages and beneficial effects that:
1. the cost is low: the working pressure of compressed air is lower and safer, the existing compressed air generating and controlling device is mature, reliable and economical, the power source of the pneumatic discharge well is a gas station, and the cost of the gas station is lower than that of a hydraulic station; the cost of the air pipe is lower as compared with that of a high-pressure oil pipe; a plurality of pneumatic discharge wells can share one gas source and one gas conveying main pipe, so that the cost is saved;
2. and (3) environmental protection: the compressed air can not introduce secondary pollution, and the compressed air device has no explosion risk;
3. the construction is simple: the excavation amount is small;
4. does not occupy the height space: the earth surface can not be exposed, and the urban beauty and traffic are not disturbed;
5. safety: the non-safety voltage is not used on the discharge well site, so that the safety accident of electricity utilization does not exist;
6. the power supply is easy to obtain: the power supply voltage of the discharge well is 220V, and the discharge well can use a municipal and civil power grid and is convenient to obtain;
7. the reliability is high: the normal work of equipment is not influenced by urban inland inundation and flooding;
8. antiwind anti-clogging ability is strong: because the sewage contains more entanglement, sundries, floaters and the like, the overflowing channel of the device after being installed and the flow channel of the municipal pipeline are completely kept in consistent and smooth transition, and the entanglement and blockage can not be generated;
9. zero water loss: the overflowing channel after the device is installed and the flow channel of the municipal pipeline are completely kept in consistent and smooth transition, and drainage and flood discharge are not influenced;
10. the service life is long: in the environment of using sewage, electric or hydraulic equipment used in the sewage can often generate faults, and the opening and closing piece of the pneumatic cut-off device is simple and cannot generate faults;
11. sealing is good: the general electric or hydraulic equipment has poor water leakage sealing caused by the blockage of sundries, and the pneumatic cut-off device adopts flexible rubber sealing and has a larger sealing surface, so the sealing effect is reliable.
12. Safe and reliable: through setting up level gauge in the well and liquid level gauge outside the well, compare the relation between liquid level in the well and the liquid level outside the well, control the export of drain pipe and switch on or end, prevent that the river from flowing backward.
Drawings
FIG. 1 is a schematic diagram of a discharge well having a first outlet and a second outlet in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a diagram of a junction control system for a discharge well having a first outlet and a second outlet in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a discharge well having a first outlet, a second outlet, and a third outlet in accordance with an embodiment of the present invention;
FIG. 5 is a cross-sectional view of FIG. 3;
FIG. 6 is a diagram of a junction control system with a first outlet, a second outlet, and a third outlet in an embodiment of the present invention.
10-discharge well, 11-discharge well body, 12-water inlet, 13-first pneumatic cut-off device, 14-second pneumatic cut-off device, 15-third pneumatic cut-off device, 16-first water outlet pipe, 17-second water outlet pipe, 18-third water outlet pipe,
20-control valve, 23-first control valve, 24-second control valve, 25-third control valve,
30-an outside-well liquid level meter, 31-an inside-well liquid level meter,
and 40, a controller.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
The present embodiment provides a backflow prevention method applied to a drain port,
the liquid level value H1 in the shaft body 11 collected by the liquid level meter 31 in the well, the liquid level value H2 outside the shaft body 11 collected by the liquid level meter 30 outside the well,
when H2 > H1, a backflow prevention program is executed: the first control valve acts, the first pneumatic cut-off device is inflated, and the first water outlet pipe is closed to prevent the fluid in the natural water body or the rainwater pipe connected with the first water outlet pipe from flowing backwards into the drainage well through the first water outlet pipe;
when H2 is H1, the first controller is actuated, the first pneumatic cut-off device starts to charge air, the first water outlet pipe starts to close gradually, and then,
if H2 is not less than H1, the first pneumatic cut-off device continuously inflates until the first water outlet pipe is cut off;
if H2 is less than H1, the first pneumatic cut-off device deflates until the first water outlet pipe is opened;
and when H2 is less than H1, the backflow preventing program is exited.
Furthermore, when the discharge port is a non-submerged discharge port, a backflow prevention water level H corresponding to the bottom elevation of the first water outlet pipe is also arranged,
when H2 is more than or equal to H and the liquid level information H2 is more than or equal to the liquid level information H1 in the well, executing a backflow preventing program;
and when H2 is less than H, the backflow preventing program is exited.
Referring to fig. 1, 2 and 3, the present embodiment provides a backflow prevention system applied to a drain, including a compressed gas source, a gas delivery pipe, a control valve, a controller, a drain well, and an external liquid level meter and an internal liquid level meter. Wherein,
the form of the discharge well is the second form, the discharge well 10 comprises a discharge well body 11, a pneumatic cut-off device, an in-well liquid level meter 31 arranged in the discharge well body 11, an out-well liquid level meter 30 arranged outside the discharge well body 11,
the drainage well body is provided with a water inlet 12 and at least two water outlets, namely a first water outlet and a second water outlet, the first water outlet is connected with a natural water body or a rainwater pipe through a first water outlet pipe 16, the second water outlet is connected with a sewage pipe or a sewage treatment facility or a storage tank or a primary rainwater pipe or an initial rainwater treatment facility through a second water outlet pipe 17, and the first water outlet pipe 16 and the second water outlet pipe 17 are both provided with a pneumatic cut-off device, namely a first pneumatic cut-off device 13 and a second pneumatic cut-off device 14. The control valve 20 comprises a first control valve 23 and a second control valve 24 controlling the first pneumatic stop 13, the second pneumatic stop 14. The first pneumatic cut-off equipment 13 and the second pneumatic cut-off equipment 14 are air bags or pneumatic pipe clamp valves, the first pneumatic cut-off equipment 13 and the second pneumatic cut-off equipment 14 are connected with a compressed air source through a gas conveying pipe, an inlet is arranged on the first pneumatic cut-off equipment, the inlet is connected with the compressed air source through the gas conveying pipe, when the air bags or the pneumatic pipe clamp valves are inflated and expanded, the first water outlet pipe 16 and the second water outlet pipe 17 are blocked and cut off, and when the air bags or the pneumatic pipe clamp valves are deflated to restore the natural state, the first water outlet pipe 16 and the second water outlet pipe 17 are communicated with the interior of the discharge well body 11 and are communicated.
The gas delivery line in this embodiment may be two main pipes, the inlet of the first pneumatic shut-off device 13 is connected to one main pipe, the main pipe is provided with a first control valve 23, the inlet of the second pneumatic shut-off device 14 is connected to the other main pipe, and the main pipe is provided with a second control valve 24. In addition, the gas delivery pipe in this embodiment may be a main pipe and two branch pipes, the main pipe communicates with the compressed gas source and the branch pipes, one branch pipe is connected to the first pneumatic shutoff device 13, the first control valve 23 is disposed on the branch pipe, the other branch pipe is connected to the second pneumatic shutoff device 14, and the second control valve 24 is disposed on the branch pipe. When the first control valve 23 is actuated, the first pneumatic cut-off device 13 can be communicated with the compressed air source or the atmosphere, the first pneumatic cut-off device 13 is inflated or deflated to restore the natural state, when the second control valve 24 is actuated, the second pneumatic cut-off device 14 can be communicated with the compressed air source or the atmosphere, and the second pneumatic cut-off device 14 is inflated or deflated to restore the natural state.
In this embodiment, a solar panel or a wind power generator may be installed beside the discharge well 10 for supplying power to the controller 40 and the control valve 20; and/or, a battery for powering the controller 40 and the control valve 20; and/or, the control valve 20 is a three-way control valve or a solenoid valve combination.
In the embodiment, the sewage treatment facility is an integrated sewage treatment station, and the initial rainwater treatment facility is a biological filter, a sedimentation tank or an inclined plate sedimentation device.
The inside liquid level meter 31, the outside liquid level meter 30, the first control valve 23 and the second control valve 24 are respectively in signal connection with the controller 40,
the in-well liquid level meter 31 and the out-of-well liquid level meter 30 are used for transmitting the acquired information of the in-well liquid level and the out-of-well liquid level to the controller 40, and the controller 40 is used for controlling the action of the control valve 20 according to the relation between the out-of-well liquid level and the in-well liquid level.
The measured H1 and H2 of this example have errors and are range values.
The first pneumatic cut-off device in the embodiment is arranged at the starting end of the first water outlet in the diversion well, or on a pipeline between the diversion well and the discharge port, or at the discharge port; and/or the second pneumatic cut-off device is arranged in the shunt well and positioned at the starting end of the second water outlet or on the pipeline of the second water outlet pipe; and/or the third pneumatic cut-off device is arranged at the starting end of the third water outlet or on the pipeline of the third water outlet pipe in the shunt well.
Example 3
Example 3 differs from example 2 in that: the discharge well is only provided with a first outlet, and a first pneumatic interception component is arranged on the first water outlet pipe.
When the backflow preventing program is withdrawn, the first control valve acts, the first pneumatic interception component deflates, and the first water outlet pipe is conducted.
Example 4
Embodiment 4 on the basis of embodiment 2, the system is further provided with other measuring instruments for detecting measurement information inside or outside the discharge well 10, wherein the measuring instruments comprise one or more of a rain gauge, a flow meter, a water gauge, a timer and a water quality monitor, and correspondingly, the measurement information comprises one or more of rainfall, instantaneous flow, accumulated flow, rainfall time and water quality.
Wherein, the rain gauge is arranged outside the discharge well 10, the rainfall is monitored, and the rainfall is monitored to be 0 in sunny days;
the flow meters are arranged on the first outlet and the second outlet of the discharge well 10 and are used for monitoring the instantaneous flow values passing through the first outlet and the second outlet and calculating the instantaneous flow entering the discharge well 10 according to the instantaneous flow values;
the water meter is arranged on the water inlet 12 of the discharge well 10, and the cumulative flow entering the discharge well 10 is measured;
the timer is arranged in the discharge well 10 and used for monitoring the raining time, and the time value monitored by the timer is 0 in sunny days;
the water quality monitor is a COD sensor and is arranged in the discharge well 10, and the COD concentration value of the water body in the discharge well 10 is monitored.
The control method after the backflow preventing program exits comprises the following steps:
setting a first threshold value Q0, wherein the measurement information collected by the measuring instrument is Q, and when the measuring instrument 30 is one or more of a rain gauge, a flow meter, a water gauge, a timer and a liquid level meter, controlling the following steps:
when the backflow preventing program exits, if Q is less than Q1, the controller 40 controls the second control valve 24 to act, so that the second pneumatic cut-off device 14 is deflated, the second water outlet pipe 17 is conducted, the first control valve 23 is controlled not to act, so that the first pneumatic cut-off device 13 is inflated, and the first water outlet pipe 16 is cut off;
when the backflow preventing program is exited, if Q is larger than or equal to Q1, the second control valve 24 is actuated or not actuated according to the current state of the second water outlet, the second pneumatic cut-off device is inflated, the second water outlet pipe 17 is cut off, and the first control valve 23 is controlled to actuate, so that the first pneumatic cut-off device 13 is deflated, and the first water outlet pipe 16 is conducted.
Example 5
Referring to fig. 4, 5, and 6, embodiment 5 differs from embodiment 2 in that: the form of the discharge well 10 is the third form, a third outlet is further arranged on the discharge well body 11, the first outlet is communicated with a rainwater pipe or a natural water body through a first water outlet pipe 16, a second water outlet pipe 17 is communicated with a sewage pipe, a regulation pool or a sewage treatment facility through a second water outlet pipe 17, the third outlet is communicated with a primary rainwater pipe or an initial rainwater treatment facility through a third water outlet pipe 18, the form of the discharge well 10 is the third form, and a first pneumatic cut-off device 13, a second pneumatic cut-off device 14 and a third pneumatic cut-off device 15 are respectively arranged on the first water outlet pipe 16, the second water outlet pipe 17 and the third water outlet pipe 18. Three main pipes can be arranged, a third control valve 25 is arranged on the third main pipe and used for controlling the third pneumatic cut-off device 15 to be inflated and deflated, and the third control valve 25 can also be arranged on the branch pipe and connected with the main pipes.
Example 6
On the basis of example 5, the difference from example 4 lies in:
setting a first threshold Q0 and a second threshold Q1 in the controller, wherein the well measuring instrument collects measurement information Q, and when the measuring instrument 30 is one or more of a rain gauge, a flow meter, a water gauge, a timer and a liquid level meter, controlling the following steps:
when the backflow preventing program exits, if Q is less than Q0, the controller 40 controls the second control valve 24 and the third control valve to act or not to act according to the current states of the second outlet and the third outlet, so that the second pneumatic cut-off device 14 is deflated, the second water outlet pipe 17 is conducted, the third pneumatic cut-off device 15 is inflated, the third water outlet pipe 18 is cut off, at the moment, the first control valve does not act, the first pneumatic cut-off device is inflated, and the first water outlet pipe is cut off;
when the backflow preventing program exits, if Q0 is not more than Q < Q1, the controller 40 controls the second control valve 24 and the third control valve 25 to act or not to act according to the states of the second water outlet pipe 17 and the third water outlet pipe 18 at the moment, so that the third pneumatic cut-off device 15 is deflated, the third water outlet pipe 18 is conducted, the first control valve 16 does not act, so that the first pneumatic cut-off device 13 is inflated, the first water outlet pipe 16 is cut off, and the second control valve 24 can selectively act or not act according to whether the device connected with the second water outlet pipe 17 has receiving capacity or not, so that the second water outlet pipe 17 is conducted or in a cut-off state, if the receiving capacity exists, the second pneumatic cut-off device 14 is deflated, the second water outlet pipe 17 is conducted, if the receiving capacity does not exist, the second pneumatic cut-off device 14 is inflated, and the second water outlet;
when the backflow preventing program exits, if Q1 is not greater than Q, the controller 40 controls the second control valve 24 and the third control valve 25 to act or not to act according to the states of the second water outlet pipe 16 and the third water outlet pipe 18 at the moment, so that the second pneumatic cut-off device 14 and the third pneumatic cut-off device 15 are inflated, the second water outlet pipe 17 and the third water outlet pipe 18 are cut off, the first control valve 23 acts, the first pneumatic cut-off device 13 is deflated, and the first water outlet pipe 16 is conducted.
Example 7
On the basis of example 1 or example 4, when the form of the discharge well is the form two or the form three, wherein,
when the drainage well is of the form two, the controller is also provided with a first armed water level H3,
when the backflow preventing program is quitted, if H1 is less than H3, the controller controls the second control valve 24 to act or not act according to the current state of the second water outlet pipe, the second pneumatic cut-off device 14 is deflated, the second water outlet pipe is conducted, the first control valve 23 is controlled not to act, the first pneumatic cut-off device 13 is inflated, and the first water outlet pipe is stopped;
when the backflow preventing program is quitted, if H1 is not less than H3, the controller controls the second control valve 24 to act or not to act according to the current state of the second water outlet pipe, the second pneumatic cut-off device 14 is inflated, the second water outlet pipe is cut off, and the first control valve 23 is controlled to act, so that the first pneumatic cut-off device 13 is deflated, and the first water outlet pipe is conducted;
when the drainage well is of the form three, the controller is also provided with a first armed water level H3, a second armed water level H4,
when the backflow preventing program is quitted, if H1 is less than H3, the controller controls the second control valve 24 and the third control valve 25 to act or not to act according to the current states of the second water outlet pipe and the third water outlet pipe, the second pneumatic cut-off device 14 deflates, the second water outlet pipe is conducted, the third pneumatic cut-off device 15 inflates air, the third water outlet pipe is cut off, the first control valve 23 is controlled not to act, the first pneumatic cut-off device 13 inflates air, and the first water outlet pipe is cut off;
when the backflow preventing program is quitted, if H3 is not more than H1 and less than H4, the controller controls the third control valve 25 to act or not to act according to the current state of the third water outlet pipe, so that the third pneumatic cut-off device 15 is deflated, the third water outlet pipe is conducted, at the moment, the second control valve 24 acts or does not act, the second pneumatic cut-off device 14 is deflated or inflated, the second water outlet pipe is conducted or stopped, the first control valve 23 does not act, the first pneumatic cut-off device 13 is inflated, the first water outlet pipe is stopped,
when the backflow preventing program is quitted, if H1 is not less than H4, the controller controls the second control valve 24 and the third control valve 25 to act or not to act according to the current states of the second water outlet pipe and the third water outlet pipe, the second pneumatic cut-off device 14 and the third pneumatic cut-off device 15 are inflated, the second water outlet pipe and the third water outlet pipe are cut off, the first control valve 23 is controlled to act, the first pneumatic cut-off device 13 is deflated, and the first water outlet pipe is conducted.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A backflow preventing method applied to a drain port is characterized in that:
collecting liquid level information H1 in the diversion well and liquid level information H2 outside the diversion well in real time,
when the liquid level information H2 outside the well is not less than the liquid level information H1 in the well, executing a backflow preventing program: the first control valve acts, the first pneumatic cut-off device is inflated, and the first water outlet pipe is closed to prevent the fluid in the natural water body or the rainwater pipe connected with the first water outlet pipe from flowing backwards into the drainage well through the first water outlet pipe;
and when the liquid level information H2 outside the well is less than the liquid level information H1 in the well, the backflow preventing program is exited.
2. The backflow prevention method applied to the drain port according to claim 1, wherein: a backflow-preventing water level H corresponding to the elevation of the bottom of the first water outlet pipe is also arranged,
when H2 is more than or equal to H and H2 is more than or equal to H1, executing a backflow preventing program;
and when H2 is less than H, the backflow preventing program is exited.
3. The backflow prevention method applied to the drain port according to claim 1, wherein:
when H2 is H1, the controller is actuated, the first pneumatic cut-off device starts to inflate, the first water outlet pipe starts to close gradually, and then,
if H2 is not less than H1, the first pneumatic cut-off device continuously inflates until the first water outlet pipe is cut off;
if H2 < H1, the first pneumatic cut-off device is deflated, and the first water outlet pipe is opened.
4. An anti-backflow system applied to a drain port, comprising:
a compressed gas source for providing compressed gas;
the gas conveying pipe is communicated with the outlet of the compressed gas source and is used for conveying compressed gas;
the control valves are arranged on the corresponding gas conveying pipes;
the controller is connected with the control valve and is used for controlling the control valve to act; and
the well is arranged at the mouth of the well,
the discharge well comprises a discharge well body, a pneumatic cut-off device and an in-well liquid level meter arranged in the discharge well body,
the drainage well body is provided with a water inlet and at least one water outlet which is a first water outlet, the first water outlet is connected with a natural water body or a rainwater pipe through a first water outlet pipe, the first water outlet pipe is provided with the pneumatic cut-off device, namely a first pneumatic cut-off device,
an outdoor liquid level meter is arranged outside the discharge well body at the downstream of the first water outlet pipe,
the liquid level meter in the well, the liquid level meter outside the well and the control valve are respectively connected with the controller by signals,
the controller is used for controlling the action of the first control valve according to the relation between the well liquid level information H1 and the well liquid level information H2.
5. A system for preventing backflow in a drain according to claim 4, wherein:
the form of the discharge well is a second form, a second outlet is further arranged on the discharge well body, the second outlet is connected with a sewage pipe or a sewage treatment facility or a regulation pool or a primary rain pipe or an initial rainwater treatment facility through a second water outlet pipe, a second pneumatic cut-off device is arranged on the second water outlet pipe, the control valve comprises a first control valve and a second control valve, the first pneumatic cut-off device and the second pneumatic cut-off device are connected with the compressed air source through a gas conveying pipeline, the first control valve is used for controlling the charging and discharging of the first pneumatic cut-off device, the second control valve is used for controlling the charging and discharging of the second pneumatic cut-off device, and the first control valve and the second control valve are respectively and electrically connected with the controller;
the form of row's mouth well is form three, still be equipped with second export and third export on arranging the mouth body, the second export links to each other with sewage pipe or sewage treatment facility or regulation pond through the second outlet pipe, the third export links to each other with just rain pipe or initial stage rainwater treatment facility or regulation pond through the third outlet pipe, just correspond respectively on second, the third outlet pipe and be equipped with second, the pneumatic cut-off equipment of third, the pneumatic cut-off equipment of second, third pass through gas delivery pipeline with compressed air source links to each other, the control valve includes first, second, third control valve, and first, second, third control valve are used for controlling respectively first, second, the pneumatic cut-off equipment of third fill, gassing, just first, second, third control valve respectively with the controller electricity is connected.
6. The anti-backflow system applied to the drain port of claim 5, wherein: the system also includes
The measuring instrument comprises one or more of a rain gauge, a flow meter, a water gauge and a timer,
correspondingly, the measurement information comprises one or more of rainfall, instantaneous flow, accumulated flow and rainfall time.
7. The anti-backflow system applied to the drain port according to claim 4, wherein the anti-backflow system is characterized in that:
when the drainage well is only provided with the first outlet and quits the backflow prevention program, the controller controls the first control valve to act, the first pneumatic cut-off device is deflated, and the first outlet is communicated.
8. The system of claim 4, wherein the anti-backflow system is applied to the drain port, and comprises: in the system:
wherein the pneumatic cut-off device is an air bag or a pneumatic pipe clamp valve,
the air bag is provided with an air inlet which is connected with the gas conveying branch pipe;
the pneumatic pinch valve also has a gas inlet that is connected to the gas delivery manifold.
9. The system of claim 5, wherein the anti-backflow system is applied to the drain port, and comprises: in the system:
the first pneumatic cut-off device is arranged at the starting end of the first water outlet in the diversion well, or on a pipeline between the diversion well and the discharge port, or at the discharge port;
and/or the second pneumatic cut-off device is arranged in the shunt well and positioned at the starting end of the second water outlet or on the pipeline of the second water outlet pipe;
and/or the third pneumatic cut-off device is arranged at the starting end of the third water outlet or on the pipeline of the third water outlet pipe in the shunt well.
10. The system of claim 3, wherein the system further comprises: the well level information H1 and the well level information H2 have an error value H0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280535.3A CN109339190A (en) | 2018-10-30 | 2018-10-30 | An anti-backflow method and system applied to a discharge outlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280535.3A CN109339190A (en) | 2018-10-30 | 2018-10-30 | An anti-backflow method and system applied to a discharge outlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109339190A true CN109339190A (en) | 2019-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811280535.3A Pending CN109339190A (en) | 2018-10-30 | 2018-10-30 | An anti-backflow method and system applied to a discharge outlet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032901A (en) * | 2020-08-24 | 2020-12-04 | 广州优易机械科技有限公司 | Ventilation energy-saving equipment of computer lab |
| CN113700119A (en) * | 2020-05-22 | 2021-11-26 | 洼石环境工程（上海）有限公司 | Unpowered intelligent vatch basin |
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Cited By (3)
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| CN113700119A (en) * | 2020-05-22 | 2021-11-26 | 洼石环境工程（上海）有限公司 | Unpowered intelligent vatch basin |
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Application publication date: 20190215 |