CN113216357B - Drainage pipeline tail end backflow prevention linkage system and construction method thereof - Google Patents
Drainage pipeline tail end backflow prevention linkage system and construction method thereof Download PDFInfo
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- CN113216357B CN113216357B CN202110418869.8A CN202110418869A CN113216357B CN 113216357 B CN113216357 B CN 113216357B CN 202110418869 A CN202110418869 A CN 202110418869A CN 113216357 B CN113216357 B CN 113216357B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
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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
- E03F5/105—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
- E03F5/22—Adaptations of pumping plants for lifting sewage
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/20—Measuring flow in sewer systems
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Abstract
The invention discloses a drainage pipeline tail end backflow prevention linkage system and a construction method thereof. The device is provided with the water flow direction detection device, so that the device can judge the signal transmitted by the device according to the direction of the water flow, and the device is a linkage control facility for preventing the river water from flowing backwards after the abnormality is found; the water storage tank and the connection structure thereof are arranged, when the river water is found to flow backwards, sewage can enter the water storage tank from the interception pipeline, and water is pumped and drained by a water pump and lifted to river, lake water and landscape water bodies; through the setting of early warning unit, can send the early warning of different grades when satisfying alarm condition to can continue to convey the rivers condition in the pipeline with signal transmission control center and monitoring platform, can know constantly.
Description
Technical Field
The invention belongs to the technical field of drainage pipeline construction, and particularly relates to a drainage pipeline tail end backflow prevention linkage system and a construction method thereof.
Background
The urban drainage system has a plurality of problems of reverse flow of river, lake water and landscape water bodies, infiltration of external water, mixed connection of rain and sewage and the like, and in addition, the quality problem and the operation management level of drainage pipelines cause that the water quality of a sewage pipeline system is mixed with a large amount of low-concentration external water, so that the BOD of a sewage treatment plant is caused5The concentration of the water inflow of the pollutants is generally low, so that the efficiency of a treatment system of a sewage plant is obviously reduced, and the effluent discharge possibly does not reach the standard. Meanwhile, as the clear water occupies the space of the sewage pipeline system, the sewage is easy to overflow, and the urban ecology and the living environment are affected. At present, no corresponding system is available for monitoring the water flow direction in the drainage pipeline in real time and carrying out backflow early warning. In addition, when the impact force of the conventional flap valve is too large and the impact height is at the lower edge of the flap valve, the flap valve can be opened by the tide water and a part of the tide water flows backwards. And it is difficult to open the heavy flapper door when the internal drain water has a low impact force. The water backflow linkage control system is very necessary for early warning and prevention of backflow of river, lake water and landscape water bodies and design of the water backflow linkage control system which can effectively judge the direction of water flow in a pipeline, so that early warning of water backflow and follow-up linkage control are carried out.
Disclosure of Invention
The invention provides a drainage pipeline tail end backflow prevention linkage system and a construction method thereof, which are used for solving the technical problems of water flow backflow detection, judgment, early warning and graded disposal and the like in the existing drainage pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drainage pipeline tail end backflow prevention linkage system comprises a drainage pipeline, a first liquid level meter and a water flow direction detection device which are connected to the front side of the tail end of the drainage pipeline, a reservoir which is connected to one side of the drainage pipeline and located between the water flow direction detection device and a water outlet, a retention pipe connected between the reservoir and the drainage pipeline, a first gate and a first gate rotating shaft connected between the retention pipe and the drainage pipeline, a water pump water suction pipeline, a water pump and a water pump water pressing pipeline connected to the other side of the reservoir, an emptying pipe connected to the bottom of the reservoir, a second liquid level meter connected to the emptying pipe, and an overflow pipe connected to the middle upper portion of the reservoir;
the water flow direction detection device is divided into an upper layer and a lower layer, the upper layer is communicated with the front and the back, and the lower layer is a sealing device; the water flow direction detection device comprises a large baffle and a small baffle which are positioned on the left and right of an upper layer, a baffle rotating shaft connected between the large baffle and the small baffle, a fixed sleeve positioned on a lower layer, a baffle rotating shaft connected inside the fixed sleeve, a torsion spring arranged at the connecting part of the baffle rotating shaft and the fixed sleeve, a linkage rod which is vertically connected with the fixed sleeve and transversely penetrated through the vertical bottom of the rotating shaft, and a first sensor and a second sensor which are respectively connected to the two swinging sides of the linkage rod;
the rotating shaft of the baffle is an L-shaped piece, the vertical part of the L-shaped piece penetrates into the fixed sleeve from the upper layer of the water flow direction detection device, and the transverse part of the L-shaped piece penetrates out of the fixed sleeve to be connected with the linkage rod.
Furthermore, mesh enclosures are arranged at the front end and the rear end of the outer part of the water flow direction detection device, and stress sensors are arranged at the mesh enclosures; and the stress inductor is respectively connected with the early warning device and the monitoring control center.
Furthermore, the upper layer of the water flow direction detection device is also connected with a guide plate, and the guide plate is arranged in parallel with the short side and the middle part of the guide plate is connected with the baffle rotating shaft.
Furthermore, the large baffle and the small baffle are rectangular strips, the long side of the large baffle is larger than the long side of the small baffle, and the large baffle and the small baffle are separated by a baffle rotating shaft; the heights of the large baffle and the small baffle are adapted to the height of the upper layer of the water flow direction detection device.
Furthermore, the height of the fixed sleeve is arranged corresponding to the lower layer of the water flow direction detection device, and the inner side of the bottom of the fixed sleeve is fixed with the bottom of the torsion spring; and the torque of the torsion spring corresponds to the deflection distance of the large baffle and the small baffle and is connected to the vertical part of the rotating shaft of the baffle.
Furthermore, the first gate is connected to the joint of the drainage pipeline and the interception pipe and is positioned in the drainage pipeline, and the diameter of the first gate is larger than that of the drainage pipeline and the interception pipe; one side of the first gate is connected with a first gate rotating shaft.
Furthermore, be connected with the second gate between blow-down pipe and the cistern, the second gate is connected with second level gauge and early warning platform respectively.
Furthermore, the water pump water suction pipeline is laid at the bottom of the reservoir, the water pump is fixed at the bottom of the reservoir in advance, and the other end of the water pump is connected with the water pump water pressure pipeline; and the water pump water pressure pipeline penetrates out of the middle upper part of the water storage tank.
Further, the construction method of the drainage pipeline tail end backflow prevention linkage system comprises the following specific steps:
step one, when no flow exists in a drainage pipeline, a first liquid level meter has no reading, and a water flow direction detection device does not deflect; when the water in the drainage pipeline is normally discharged, the first liquid level meter reads, and the water flow direction detection device deflects in the positive direction; when the backflow does not occur, the first gate is in a closed state, and the water in the drainage pipeline is normally discharged into the river channel;
step two, when no normal water body is discharged in the drainage pipeline but river water flows backwards, the first liquid level meter reads, and the water flow direction detection device deflects reversely; when normal water body is discharged in the drainage pipeline and river water flows backwards at the same time, the reading of the first liquid level meter is unchanged or continuously rises, the water flow direction detection device deflects reversely or forwards, but the deflection angle is smaller than the initial deflection angle, and the river water is judged to flow backwards;
thirdly, when it is judged that the river water flows backwards, the water flow direction detection device and the first liquid level meter feed back a river water backflow signal to the early warning device and send a primary warning signal, meanwhile, the warning signal is transmitted to the monitoring platform and the control center, then, if the first liquid level meter monitors that the liquid level of the pipeline reaches a specified liquid level, the early warning display sends a secondary warning signal, the first gate is controlled to be opened through the computer, the backflow river water is blocked near the discharge port of the drainage pipeline, and does not enter and affect the drainage pipe network system;
step four, simultaneously, the normally discharged water body enters the reservoir through the interception pipe, and when the second liquid level meter detects that the liquid level in the reservoir is higher than or equal to the designated liquid level, a water pump is started to transfer the water body in the reservoir to the river channel through a water pump pressure water pipeline; when the second liquid level meter detects that the liquid level in the water storage tank is lower than the designated liquid level, the water pump is not started; when the second liquid level meter monitors that the liquid level in the water storage tank reaches the height of 30s of suction volume of one water pump, starting the second water pump; if the water level is too high, the water body is discharged to the river channel from the overflow pipe;
step five, when the flowmeter detects the river flow, the second gate is in a closed state; if the flowmeter does not detect the river flow, the second gate is in an open state. Particularly, when the second gate is in an open state, if the second liquid level meter detects that the liquid level in the water storage tank is still higher than the designated liquid level, the water pump is closed to enable the water body in the water storage tank to be discharged to the river channel through the emptying pipe so as to reduce the energy consumption of the water pump.
Furthermore, to among the rivers direction detection device, the area of big baffle and little baffle is different, and the power that receives under the same condition of pressure is different, and is different at the rivers direction, and the pivot is partial to different directions, and then triggers corresponding sensor, and level information just can carry out the early warning to this pipeline river water condition of flowing backward in the pipeline of reunion first level gauge transmission. The other part is started after the river water is found to flow backwards, and the other part comprises a retention pipe, a water storage tank and a lifting water pump.
The water flow direction detection device and the first liquid level meter jointly act as a detector of the early warning unit, signals are transmitted to the early warning display, early warnings of different levels can be sent out when warning conditions are met, the signals can be continuously transmitted to the control center and the monitoring platform, and the gate and the water pump are opened under the control of the control center when secondary early warning is achieved. When the early warning state disappears, the gate and the water pump can be closed under the control of the control center and are restored to the original state. The monitoring platform can know the water flow condition in the pipeline all the time.
The invention has the beneficial effects that:
1) the device is provided with the water flow direction detection device, so that the device is favorable for judging signals transmitted by the device according to the direction of water flow, and is a linkage control facility for preventing river water from flowing backwards after abnormality is found; the water flow direction detection device is divided into an upper layer and a lower layer, the upper layer is a water flow passing area, and the front end and the rear end outside the upper layer are also provided with mesh enclosures to prevent large stones from damaging the baffle; the lower layer is a sealing device, and a torsion spring is arranged on an internal rotating shaft and can reset the baffle; the linkage rod connected with the rotating shaft can trigger the two sensors at the lower layer to transmit signals so as to judge the water flow direction and facilitate subsequent control;
2) according to the invention, through the combined arrangement of the first liquid level meters, the liquid level information in the pipeline transmitted by the first liquid level meters can be used for early warning the condition of backward flowing of river water in the pipeline;
3) by arranging the reservoir and the connecting structure thereof, when the river water is found to flow backwards, the sewage can enter the reservoir from the intercepting pipeline and is pumped and drained by a water pump to be lifted into river, lake water and landscape water;
4) according to the invention, through the arrangement of the early warning unit, when the alarm condition is met, different levels of early warning can be sent out, and signals can be continuously transmitted to the control center and the monitoring platform, so that the water flow condition in the pipeline can be known at any time.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic view of a working flow of a back-flow prevention linkage system at the tail end of a rainwater pipeline;
FIG. 2 is a schematic view of a water flow direction detection device early warning monitoring process;
FIG. 3 is a plan view of a rainwater pipeline end backflow prevention linkage system;
FIG. 4 is a vertical arrangement view of a back-flow prevention linkage system at the tail end of a rainwater pipeline; (ii) a
FIG. 5 is a schematic view of a double-layered vertical surface of the water flow direction detecting device;
FIG. 6 is a top plan view of the water flow direction detecting means;
FIG. 7 is a lower floor plan view of the water flow direction detecting device;
FIG. 8 is a first view of the upper deflection plane arrangement of the water flow direction detecting means;
FIG. 9 is a first view of the lower deflection plane arrangement of the water flow direction detecting device;
FIG. 10 is a second view of the upper deflection plane arrangement of the water flow direction detecting device;
FIG. 11 is a second view of the lower deflection plane arrangement of the water flow direction detecting device;
FIG. 12 is a schematic view of the connection of the drain line to the trap pipe;
FIG. 13 is a schematic view of the operation of the first gate;
fig. 14 is a schematic view of the arrangement of the water reservoirs and their connection structure.
Reference numerals are as follows: 1-drainage pipe, 2-first liquid level meter, 3-water flow direction detection device, 31-large baffle, 32-baffle rotating shaft, 33-small baffle, 34-fixed sleeve, 35-torsion spring, 36-linkage rod, 37-first sensor, 38-second sensor, 39-guide plate, 4-first gate, 5-first gate rotating shaft, 6-interception pipe, 7-reservoir, 8-second liquid level meter, 9-water pump suction pipeline, 10-water pump, 11-water pump pressure water pipeline, 12-second gate, 13-emptying pipe, 14-flowmeter and 15-overflow pipe.
Detailed Description
As shown in fig. 1 to 14, fig. 1 and 2 are schematic diagrams of a working flow of a terminal backflow prevention linkage system of a rainwater pipeline and a flow of an early warning and monitoring of a water flow direction detection device 3. Fig. 3 to 14 show the anti-backflow linkage system at the end of the drainage pipeline and the construction schematic diagram thereof, wherein the dotted line in the drawing is the designated liquid level, the arrow direction of the straight solid line is the water flow direction, and the arc arrow indicates the deflection direction.
Referring to fig. 3 to 14, a drain pipe end backflow prevention linkage system includes a drain pipe 1, a first level gauge 2 and a water flow direction detection device 3 connected to a front side of a tail end of the drain pipe 1, a reservoir 7 connected to one side of the drain pipe 1 and located between the water flow direction detection device 3 and a drain outlet, a trap pipe 6 connected between the reservoir 7 and the drain pipe 1, a first gate 4 and a first gate rotation shaft 5 connected between the trap pipe 6 and the drain pipe 1, a water pump suction pipe 9, a water pump 10 and a water pump pressure pipe 11 connected to the other side of the reservoir 7, a second level gauge 8 connected to an emptying pipe 13 and an emptying pipe 13 at a bottom of the reservoir 7, and an overflow pipe 15 connected to an upper middle portion of the reservoir 7; the water flow direction detection device 3 and the first liquid level meter 2 jointly act to form an early warning unit, signals are transmitted to an early warning display, and are continuously transmitted to a control center and a monitoring platform to control the opening and closing of the corresponding gate and the corresponding water pump 10.
As shown in fig. 5 to 11, the water flow direction detector 3 is made of hard plastic, galvanized steel sheet, alloy, or the like. The water flow direction detection device 3 is divided into an upper layer and a lower layer, the upper layer is communicated with the front and the back, and the lower layer is a sealing device; the water flow direction detection device 3 comprises a large baffle 31 and a small baffle 33 which are positioned on the left and right of the upper layer, a baffle rotating shaft 32 connected between the large baffle 31 and the small baffle 33, a fixed sleeve 34 positioned on the lower layer, a baffle rotating shaft 32 connected inside the fixed sleeve 34, a torsion spring 35 arranged at the connecting part of the baffle rotating shaft 32 and the fixed sleeve 34, a linkage rod 36 which transversely penetrates through the fixed sleeve 34 at the vertical bottom of the rotating shaft and is vertically connected with the vertical bottom of the rotating shaft, and a first sensor 37 and a second sensor 38 which are respectively connected to the two swinging sides of the linkage rod 36; wherein the torsion spring 35 can reset the baffle.
In this embodiment, the large baffle 31 and the small baffle 33 are used for sensing the water flow and generating corresponding deflection force; a first sensor 37 and a second sensor 38 are used to generate deflection signals. In the water flow direction detection device 3, the large baffle 31 and the small baffle 33 have different areas, are subjected to different forces under the condition of the same pressure intensity, and deflect towards different directions when the water flow directions are different, so that corresponding sensors are triggered, and the river water backflow condition in the pipeline can be warned by combining liquid level information in the pipeline transmitted by the first liquid level meter 2; the other part is started after river water is found to flow backwards, and the other part comprises a retaining pipe 6, a water storage tank 7 and a lifting water pump 10. The two ends of the linkage rod 36 are connected with a sensor trigger device, and the linkage rod 36 and the linkage device are fixedly connected with the baffle rotating shaft 32; the water flow direction detection device 3 and the first liquid level meter 2 jointly act as a detector of an early warning unit, signals are transmitted to an early warning display, when warning conditions are met, early warnings of different levels can be sent out, the signals can be continuously transmitted to a control center and a monitoring platform, and when secondary early warning is achieved, a gate and a water pump 10 are started under the control of the control center; when the early warning state disappears, the gate and the water pump 10 can be closed under the control of the control center and return to the original state; the monitoring platform can know the water flow condition in the pipeline at any time.
In this embodiment, the baffle rotating shaft 32 is made of a steel rod, the baffle rotating shaft 32 is an L-shaped member, and the vertical portion of the L-shaped member penetrates through the fixing sleeve 34 from the upper layer of the water flow direction detecting device 3 and the horizontal portion penetrates through the fixing sleeve 34 to be connected with the linkage rod 36. The front end and the rear end of the outer part of the water flow direction detection device 3 are provided with mesh enclosures, and stress inductors are arranged at the mesh enclosures; the stress inductor is respectively connected with the early warning device and the monitoring control center. When the stress sensor monitors that the stress at the mesh enclosure is increased or abnormal, the mesh enclosure is cleaned and replaced in time.
In this embodiment, the upper layer of the water flow direction detecting device 3 is further connected with a guide plate 39, the guide plate 39 is arranged in parallel with the short side and the middle part is connected with the baffle rotating shaft 32. The large baffle 31 and the small baffle 33 are rectangular strips, the long side of the large baffle 31 is larger than the long side of the small baffle 33, and the two take the baffle rotating shaft 32 as a boundary; the heights of the large baffle 31 and the small baffle 33 are adapted to the height setting of the upper layer of the water flow direction detection device 3.
In this embodiment, the height of the fixing sleeve 34 is set corresponding to the lower layer of the water flow direction detecting device 3, and the inner side of the bottom of the fixing sleeve 34 is fixed to the bottom of the torsion spring 35; the torsion spring 35 has a torque corresponding to the deflection distance between the large baffle 31 and the small baffle 33, and is connected to the vertical part of the baffle rotating shaft 32.
As shown in fig. 12 and 13, a first gate 4 is connected to the junction of the drain pipe 1 and the trap pipe 6 and is located inside the drain pipe side, the diameter of the first gate 4 being larger than the diameters of the drain pipe 1 and the trap pipe 6; one side of the first gate 4 is connected with a first gate rotating shaft 5.
As shown in fig. 14, the water pump suction pipeline 9 is laid at the bottom of the reservoir 7, and the water pump 10 is fixed at the bottom of the reservoir 7 in advance, and the other end of the water pump 10 is connected with the water pump pressure pipeline 11; the water pump water pressure pipeline 11 penetrates out of the middle upper part of the water storage tank 7.
With reference to fig. 1 to 14, a construction method of the anti-backflow linkage system at the tail end of the drainage pipeline is further described, and the specific steps are as follows:
step one, when no flow exists in the drainage pipeline 1, the first liquid level meter 2 has no reading, and the water flow direction detection device 3 does not deflect; when water in the drainage pipeline 1 is normally drained, the first liquid level meter 2 has reading, and the water flow direction detection device 3 deflects in the positive direction; when the backflow does not occur, the first gate 4 is in a closed state, and the water in the drainage pipeline 1 is normally discharged into the river channel.
Step two, when no normal water body is discharged in the drainage pipeline 1 but river water flows backwards, the first liquid level meter 2 reads, and the water flow direction detection device 3 deflects reversely; when the normal water body is discharged in the drainage pipeline 1 and the river flows backwards at the same time, the reading of the first liquid level meter 2 is unchanged or continuously rises, the water flow direction detection device 3 deflects reversely or still deflects forwards, but the deflection angle is smaller than the initial deflection angle, and the river is judged to flow backwards.
And step three, when it is determined that the river water flows backwards, feeding back a river water backflow signal to the early warning device by the water flow direction detection device 3 and the first liquid level meter 2, sending a primary alarm signal, transmitting the alarm signal to the monitoring platform and the control center, and sending a secondary alarm signal by the early warning display if the liquid level of the pipeline is monitored by the first liquid level meter 2 to reach a specified liquid level, controlling the first gate 4 to open by the computer, wherein the backflow river water is blocked near the discharge port of the drainage pipeline 1 and does not enter and influence the drainage pipeline network system.
Step four, meanwhile, the normally discharged water body enters the reservoir 7 through the interception pipe 6, when the second liquid level meter 8 detects that the liquid level in the reservoir 7 is higher than or equal to the designated liquid level (which needs to be determined according to the specific water pump model), one water pump 10 is started, and the water body in the reservoir 7 is transferred to the river channel through the water pump pressure water pipeline 11; the water pump pressure water pipeline 11 is used for transferring water lifted by the water pump 10, and the elevation of the water outlet part of the pressure water pipeline is higher than the local flood level in 50 years. When the second liquid level meter 8 detects that the liquid level in the reservoir 7 is lower than the designated liquid level, the water pump 10 is not started; when the second liquid level meter 8 detects that the liquid level in the reservoir 7 reaches the height of the pumping amount of one water pump 10 in 30s, the second water pump 10 is started; if the water level is too high, the water body is discharged to the river channel from the overflow pipe 15; when the water level in the reservoir 7 rises too fast and the water pump 10 is not sufficient, water can be discharged from the overflow pipe 15.
Step five, when the flowmeter 14 detects the river flow, the second gate 12 is in a closed state; if the flowmeter 14 does not detect the river flow, the second gate 12 is in an open state; specifically, when the second gate 12 is in the open state, if the second liquid level meter 8 detects that the liquid level in the reservoir 7 is still higher than the designated liquid level, the water pump 10 is turned off to discharge the water in the reservoir 7 to the river channel through the vent pipe 13, so as to reduce the energy consumption of the water pump 10.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (3)
1. The utility model provides a drainage pipe end anti-backflow linked system, a serial communication port, including drainage pipe (1), connect in first level gauge (2) and water flow direction detection device (3) of drainage pipe (1) terminal front side, connect in drainage pipe (1) one side and be located cistern (7) between water flow direction detection device (3) and the outlet, connect in cistern (7) and drainage pipe (1) between hold-off pipe (6), connect in hold-off pipe (6) and drainage pipe (1) between first gate (4) and first gate pivot (5), connect in the water pump pipeline (9) that absorb water of cistern (7) opposite side, a water pump (10), a water pump water-pressing pipeline (11), an emptying pipe (13) connected to the bottom of the reservoir (7), a second liquid level meter (8) arranged on the emptying pipe (13), and an overflow pipe (15) connected to the middle upper part of the reservoir (7);
the water flow direction detection device (3) and the first liquid level meter (2) jointly act to form an early warning unit, signals are transmitted to an early warning display, and are continuously transmitted to a control center and a monitoring platform to control the opening and closing of a corresponding gate and a corresponding water pump (10);
the water flow direction detection device (3) is divided into an upper layer and a lower layer, the upper layer is communicated with the front and the back, and the lower layer is a sealing device; the water flow direction detection device (3) comprises a large baffle (31) and a small baffle (33) which are positioned on the left side and the right side of the upper layer, a baffle rotating shaft (32) connected between the large baffle (31) and the small baffle (33), a fixed sleeve (34) positioned on the lower layer, a baffle rotating shaft (32) connected inside the fixed sleeve (34), a torsion spring (35) arranged at the connecting part of the baffle rotating shaft (32) and the fixed sleeve (34), a linkage rod (36) vertically connected with the fixed sleeve (34) and transversely penetrated through the fixed sleeve (34) at the vertical bottom of the rotating shaft, and a first sensor (37) and a second sensor (38) respectively connected to the two swinging sides of the linkage rod (36);
the baffle rotating shaft (32) is an L-shaped piece, the vertical part of the L-shaped piece penetrates into the fixed sleeve (34) from the upper layer of the water flow direction detection device (3), and the transverse part penetrates out of the fixed sleeve (34) to be connected with the linkage rod (36);
mesh enclosures are arranged at the front end and the rear end of the outer part of the upper layer of the water flow direction detection device (3), and stress inductors are arranged at the mesh enclosures; the stress inductor is respectively connected with the early warning device and the monitoring control center;
the upper layer of the water flow direction detection device (3) is also connected with a guide plate (39), the guide plate (39) is arranged in parallel with the short side, and the middle part of the guide plate is connected with the baffle rotating shaft (32);
the large baffle (31) and the small baffle (33) are rectangular strips, the long side of the large baffle (31) is larger than the long side of the small baffle (33), and the large baffle and the small baffle are separated by a baffle rotating shaft (32); the heights of the large baffle (31) and the small baffle (33) are suitable for the height setting of the upper layer of the water flow direction detection device (3);
the height of the fixed sleeve (34) is arranged corresponding to the lower layer of the water flow direction detection device (3), and the inner side of the bottom of the fixed sleeve (34) is fixed with the bottom of the torsion spring (35); the torque of the torsion spring (35) corresponds to the deflection distance of the large baffle (31) and the small baffle (33) and is connected to the vertical part of the baffle rotating shaft (32);
the first gate (4) is connected to the joint of the drainage pipeline (1) and the interception pipe (6) and is positioned inside one side of the drainage pipeline, and the diameter of the first gate (4) is larger than that of the drainage pipeline (1) and the interception pipe (6); one side of the first gate (4) is connected with a first gate rotating shaft (5);
a second gate (12) is connected between the emptying pipe (13) and the reservoir (7), and the second gate (12) is respectively connected with a second liquid level meter (8) and the early warning platform;
the water pump water suction pipeline (9) is laid at the bottom of the reservoir (7), the water pump (10) is fixed at the bottom of the reservoir (7) in advance, and the other end of the water pump (10) is connected with a water pump pressure pipeline (11); and the water pump water pressure pipeline (11) penetrates out of the middle upper part of the reservoir (7).
2. The construction method of the anti-backflow linkage system at the tail end of the drainage pipeline according to claim 1 is characterized by comprising the following specific steps:
step one, when no flow exists in the drainage pipeline (1), the first liquid level meter (2) has no reading, and the water flow direction detection device (3) does not deflect; when water in the drainage pipeline (1) is normally drained, the first liquid level meter (2) has reading, and the water flow direction detection device (3) deflects in the positive direction; when the backflow does not occur, the first gate (4) is in a closed state, and the water body in the drainage pipeline (1) is normally discharged into the river channel;
step two, when the drainage pipeline (1) does not discharge normal water but river water flows backwards, the first liquid level meter (2) reads, and the water flow direction detection device (3) deflects reversely; when normal water body is discharged in the drainage pipeline (1) and river water flows backwards at the same time, the reading of the first liquid level meter (2) is unchanged or continuously rises, the water flow direction detection device (3) deflects reversely or deflects forwards, but the deflection angle is smaller than the initial deflection angle, and the river water is judged to flow backwards;
thirdly, when it is determined that the reverse flow of the river occurs, feeding back a river reverse flow signal to the early warning device by the water flow direction detection device (3) and the first liquid level meter (2) and sending a primary warning signal, transmitting the warning signal to the monitoring platform and the control center, and sending a secondary warning signal by the early warning display if the liquid level of the pipeline is monitored by the first liquid level meter (2) to reach a specified liquid level, controlling the opening of the first gate (4) through the computer, wherein the reverse flow river is blocked near the discharge opening of the drainage pipeline (1) and does not enter and influence the drainage pipeline network system;
step four, meanwhile, the normally discharged water body enters the reservoir (7) through the interception pipe (6), when the second liquid level meter (8) detects that the liquid level in the reservoir (7) is higher than or equal to the specified liquid level, a water pump (10) is started, and the water body in the reservoir (7) is transferred to the river channel through a water pump pressure water pipeline (11); when the second liquid level meter (8) detects that the liquid level in the reservoir (7) is lower than the designated liquid level, the water pump (10) is not started; when the second liquid level meter (8) detects that the liquid level in the reservoir (7) reaches the height of 30s of the suction amount of one water pump (10), the second water pump (10) is started; if the water level is too high, the water body is discharged to the river channel from the overflow pipe (15);
step five, when the flowmeter (14) detects the river flow, the second gate (12) is in a closed state; if the flowmeter (14) does not detect the river flow, the second gate (12) is in an open state; when the second gate (12) is in an open state, if the second liquid level meter (8) detects that the liquid level in the reservoir (7) is still higher than the designated liquid level, the water pump (10) is turned off, so that the water in the reservoir (7) is discharged to the river channel through the emptying pipe (13) to reduce the energy consumption of the water pump (10).
3. The construction method of the anti-backflow linkage system at the tail end of the drainage pipeline as claimed in claim 2, characterized in that in the water flow direction detection device (3), the areas of the large baffle (31) and the small baffle (33) are different, the force applied to the large baffle and the small baffle under the condition of the same pressure are different, and when the water flow directions are different, the rotating shaft deflects to different directions to trigger corresponding sensors, and then the early warning on the backflow condition of river water in the pipeline can be carried out by combining with the liquid level information in the pipeline, which is transmitted by the first liquid level meter (2); the other part is started after the river water is found to flow backwards, and comprises a retention pipe (6), a water storage tank (7) and a lifting water pump; the two ends of the linkage rod (36) are connected with sensor trigger devices, and the linkage rod (36) is fixedly connected with the linkage device and the baffle rotating shaft (32); the water flow direction detection device (3) and the first liquid level meter (2) jointly act as a detector of an early warning unit, signals are transmitted to an early warning display, when warning conditions are met, early warnings of different levels can be sent out, the signals can be continuously transmitted to a control center and a monitoring platform, and when secondary early warning is achieved, a gate and a water pump (10) are opened under the control of the control center; when the early warning state disappears, the gate and the water pump (10) can be closed under the control of the control center and return to the original state; the monitoring platform can know the water flow condition in the pipeline at any time.
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