CN110609063B - Liquid dangerous chemicals leakage bridge deck induction detection early warning device - Google Patents
Liquid dangerous chemicals leakage bridge deck induction detection early warning device Download PDFInfo
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- CN110609063B CN110609063B CN201910740049.3A CN201910740049A CN110609063B CN 110609063 B CN110609063 B CN 110609063B CN 201910740049 A CN201910740049 A CN 201910740049A CN 110609063 B CN110609063 B CN 110609063B
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- 238000001514 detection method Methods 0.000 title claims abstract description 144
- 239000007788 liquid Substances 0.000 title claims abstract description 79
- 239000000126 substance Substances 0.000 title claims abstract description 25
- 230000006698 induction Effects 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 241001513371 Knautia arvensis Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/07—Construction of measuring vessels; Electrodes therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The liquid dangerous chemicals leakage bridge deck induction detection early warning device is characterized in that a primary detection early warning unit is arranged beside a solid line outside a traffic lane beside each water outlet of the bridge deck; the secondary detection early warning units are arranged around each water drain and are distributed in a semi-buried surrounding manner; the primary detection early warning unit and the secondary detection early warning unit are positioned on a bridge deck runoff runner, wherein the primary detection early warning unit is positioned at the upstream; the first-stage detection early warning unit comprises a liquid dielectric constant detection sensor, a first storage module pre-stored with rain and snow dielectric constants, a first CPU processing module, a first wireless communication module and a first protective shell; the second-level detection early warning unit comprises a liquid conductivity detection sensor, a PH value detection sensor, a liquid density detection sensor, a second storage module pre-stored with normal values of detection indexes, a second CPU processing module, a second wireless communication module and a second protective shell.
Description
Technical Field
The invention discloses a bridge deck detection and early warning system capable of detecting leakage of liquid dangerous chemicals.
Background
Along with the more and more frequent transportation of dangerous chemicals across the sea and the river, the types of the dangerous chemicals are more and more complicated, and once the transportation leakage accident occurs, serious pollution is caused to the water environment under the bridge, and especially for the bridge across the sea and the river, the ecological safety is seriously endangered. The emergency time of the dangerous chemical leakage accident is urgent, so that the emergency measures are required to be simple and effective to operate, and the application range is wide. Therefore, measures for early detection and early warning of dangerous chemicals leaked from the bridge deck are necessary.
The bridge deck runoff detecting system of the highway bridge of present design mostly sets up in the pipeline of water discharge port below, and current bridge deck runoff detecting device exists not enough: 1. for reasons such as bridge bearing, span length, driving safety, capacity of a collecting tank, construction site of the collecting tank and the like of a river-crossing sea bridge, the bridge deck runoff collecting device cannot be installed, so that bridge deck runoffs are all in a 'direct drainage' mode, and the detection mode in a drainage pipeline is difficult to realize. 2. Aiming at the direct drainage mode of the cross-river and cross-sea bridge, the current detection pool and the device for detecting the Chi Weihua product liquid are difficult to install, and after each rain, the bridge deck runoff water collected by the collection pool needs to be manually and periodically drained so that the bridge deck runoff water has sufficient volume to accommodate possible dangerous product leakage. If the collecting tank is not emptied in time, the collecting tank loses collecting significance. 3. Current bridge deck runoff collection systems are not easy to repair and replace. 4. Leakage of dangerous chemicals cannot be detected immediately on the bridge deck, delay is achieved, and potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a liquid dangerous chemicals leakage bridge deck induction detection early warning device.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the liquid dangerous chemicals leakage bridge deck induction detection and early warning device is characterized in that a primary detection and early warning unit is arranged beside a solid line outside a traffic lane beside each water outlet of the bridge deck; the secondary detection early warning units are arranged around each water drain and are distributed in a semi-buried surrounding manner; the primary detection early warning unit and the secondary detection early warning unit are positioned on a bridge deck runoff runner, wherein the primary detection early warning unit is positioned at the upstream;
the first-stage detection early warning unit comprises a liquid dielectric constant detection sensor, a first storage module, a first CPU processing module, a first wireless communication module and a first protective shell, wherein the first storage module is pre-stored with a rain and snow dielectric constant; when the leakage liquid of the bridge deck flows into the primary detection early warning unit, the liquid dielectric constant detection sensor is contacted at first, the dielectric constant of the leakage liquid is detected, data are transmitted to the first CPU processing module after detection, the first CPU processing module compares the dielectric constant of the leakage liquid of the bridge deck with the rain and snow dielectric constant pre-stored in the first storage module, and if the difference between the dielectric constant of the leakage liquid of the bridge deck and the rain and snow dielectric constant is greater than or equal to a threshold value, the first CPU processing module instructs the first wireless communication module to send an early warning signal; if the difference between the dielectric constant of the bridge deck leakage liquid and the dielectric constant of the rain and snow is smaller than a threshold value, the first CPU processing module instructs the first wireless communication module to send an inlet valve opening signal to the second wireless communication module of the secondary detection early warning unit;
the secondary detection early warning unit comprises a liquid conductivity detection sensor, a PH value detection sensor, a liquid density detection sensor, a second storage module pre-stored with normal values of detection indexes, a second CPU processing module, a second wireless communication module and a second protective shell; the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor are arranged at an inlet valve of the secondary detection early-warning unit and are respectively connected with the second CPU processing module; the control end of the inlet valve is connected with the second CPU processing module, and the inlet valve is arranged at the middle point of four sides of the protective shell; when the second wireless communication module receives an inlet valve opening signal transmitted by the first wireless communication module, the second CPU processing module instructs to control the inlet valve to be opened; after the inlet valve is opened, the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor detect bridge deck leakage liquid, and when the difference between the detection values of the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor and the normal value stored in the second storage module is larger than a threshold value, the second CPU processing module instructs the second wireless communication module to send an early warning signal.
Preferably, the external shape of the secondary detection early warning unit is a groove shape, the secondary detection early warning unit is arranged around the water discharge port, the sensor group is arranged in the protective shell, the secondary detection early warning unit adopts a semi-buried arrangement mode according to the gradient around the water discharge port, and the part of the protective shell higher than the bridge deck is not influenced by bridge deck water discharge.
The invention has the advantages that: the liquid dangerous chemical leakage bridge deck induction detection early warning device can rapidly detect the leakage of the dangerous chemical on the bridge deck and rapidly early warn before the liquid dangerous chemical flows into the water leakage port; the adopted bridge deck detection early warning device is convenient to install, replace and maintain, and is beneficial to application and popularization; the valve is automatically opened and closed through a built-in sensing system; the induction detection early warning device realizes bridge deck grading rapid detection early warning, can gain valuable time for emergency treatment of bridge management departments, and can effectively delay leakage of liquid dangerous chemicals into river and sea areas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, and the drawings in the description that follow are only some embodiments of the present invention.
FIG. 1a is a side view of a primary detection and early warning unit of the present invention;
FIG. 1b is a top view of a primary detection and early warning unit of the present invention;
FIG. 2 is a schematic diagram of a structure of a secondary detection and early warning unit;
FIG. 3 is a diagram of the placement of a secondary detection and early warning unit on a deck;
FIG. 4 is a detection flow chart of the primary detection early warning unit of the present invention;
FIG. 5 is a detection flow chart of the secondary detection early warning unit of the present invention;
fig. 6 is a system configuration diagram of the present invention.
In the figure: 1. a primary detection early warning unit; 2. a secondary detection early warning unit; 3. bridge deck water drainage port; 11. a first-level detection early-warning unit sensor group; 12. a first protective housing; 21. a secondary detection early-warning unit sensor group; 22. a second protective housing; 23. a liquid guide pipe in the secondary detection early warning unit; 24. an inlet control valve of the secondary detection early warning unit;
Detailed Description
The above-described aspects are further described below in conjunction with specific embodiments. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
As shown in FIG. 1, the liquid dangerous chemicals leakage bridge deck induction detection and early warning device comprises a primary detection and early warning unit 1 and a secondary detection and early warning unit 2;
the primary detection early warning unit 1 comprises a liquid dielectric constant detection sensor 11, a first storage module pre-stored with normal rain and snow dielectric constant index values, a first CPU processing module, a first wireless communication module and a first protective shell 12;
the secondary detection early-warning unit comprises a liquid conductivity sensor, a PH value detection sensor, a secondary detection early-warning unit sensor group 21 of a liquid density detection sensor, a second storage module pre-stored with normal liquid detection index values, a second CPU processing module, a second wireless communication module, a second protective shell 22 and a liquid guide pipe 23 in the secondary detection early-warning unit;
the secondary detection early-warning units 2 are arranged around each water drain of each section, and each primary detection early-warning unit 1 is arranged beside a solid line outside a traffic lane near each water drain; when the leakage liquid of the bridge deck flows into the primary detection early warning unit, the liquid dielectric constant detection sensor 11 is contacted at first, the dielectric constant of the leakage liquid is detected, data are transmitted to the first CPU processing module after detection, the first CPU processing module compares the dielectric constant of the leakage liquid of the bridge deck with the normal rain and snow dielectric constant pre-stored in the first storage module, if the difference between the dielectric constant of the leakage liquid of the bridge deck and the rain and snow dielectric constant is larger than or equal to a threshold value, the first CPU processing module instructs the first wireless communication module to send an early warning signal, and then the bridge emergency management department carries out emergency treatment; if the difference between the dielectric constant of the bridge deck leakage liquid and the dielectric constant of the rain and snow is smaller than a threshold value, the first CPU processing module instructs the first wireless communication module to send an inlet control valve opening signal to the second wireless communication module of the secondary detection early warning unit;
when the second wireless communication module receives an inlet control valve opening signal transmitted by the first wireless communication module, the second CPU processing module instructs the inlet control valve to be opened; after the inlet control valve is opened, the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor detect bridge deck leakage liquid, and when the difference between the detection values of the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor and a pre-stored normal value is larger than a preset threshold value, the second CPU processing module instructs the second wireless communication module to send an early warning signal, and then the bridge emergency management department performs emergency treatment.
1. The working principle of the invention is briefly described as follows:
the first storage module of the first-stage detection early warning unit 1 stores normal dielectric constant values close to rain and snow, and has few dangerous chemical substances close to the dielectric constant of water, and the dielectric constants of other liquid dangerous chemical substances are very different from those of common liquids such as water;
2. the detection principle of the liquid dangerous chemicals detection early-warning unit is briefly described as follows:
1. the detection of the conductivity in the secondary detection early-warning unit sensor group mainly detects liquid dangerous chemicals and solid dangerous chemicals dissolved in rainwater, so that the situation that the liquid dangerous chemicals are close to the normal rain and snow dielectric constant and dangerous chemicals which cannot be detected through the dielectric constant is compensated; the PH value detection sensor is mainly used for detecting chemical dangerous goods with strong acid and strong alkali characteristics, and the conductivity of the liquid is increased when the PH value of the liquid is larger due to the detection of the conductivity in the sensor group of the secondary detection early-warning unit, so the PH value detection is an alternative detection parameter of the invention; considering that precipitation in different areas and earth on a bridge have different properties, a liquid density detection sensor is alternatively arranged;
2. the sensor group in the secondary detection early warning unit is arranged at the inlet control valve at the middle position of four sides in the protective shell, and the liquid is immediately detected after the inlet control valve is opened to flow into the guide pipes at two sides after the detection is finished;
3. the distance between the first-level detection and early-warning unit and the second-level detection and early-warning unit is set according to the time of the liquid flowing from the first-level detection and early-warning unit to the second-level detection and early-warning unit, and the calculation basis is as follows:
T 1 ＝t 1 +t 2
t 1 the time for the liquid at the bridge deck transverse primary detection early warning unit device to overflow to the secondary detection early warning unit device is related to the width and the transverse slope; t is t 2 The time for the furthest water flow from the longitudinal water collection point to the first water discharge port is related to the drainage section form and the longitudinal slope. The water flow in the bridge deck transverse overflow process is shallow, and the formula is adopted
m 1 Is the surface roughness coefficient; i.e h Is a transverse slope of the bridge deck. The longitudinal confluence time is calculated as
v v For the longitudinal water collection average flow rate,
i v is a bridge deck longitudinal slope; l (L) 1 Is the distance from the farthest longitudinal water collecting point to the first water discharging port.
4. Time T from flowing into the secondary detection and early warning unit to overflow of the guide pipe 2 According to the formula
v p For the flow rate of the liquid flowing into the draft tube 23, s is the length of the tube section, α is the flow rate gradient calculation coefficient, i p A gradient is arranged in the pipeline.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, and the scope of protection of the present invention and equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.
Claims (1)
1. Liquid dangerous chemicals leakage bridge deck response detects early warning device, its characterized in that: the primary detection early warning unit is arranged beside a solid line outside a traffic lane beside each water drain of the bridge deck; the secondary detection early warning units are arranged around each water drain and are distributed in a semi-buried surrounding manner; the primary detection early warning unit and the secondary detection early warning unit are positioned on a bridge deck runoff runner, wherein the primary detection early warning unit is positioned at the upstream; the first-stage detection early warning unit comprises a liquid dielectric constant detection sensor, a first storage module pre-stored with rain and snow dielectric constants, a first CPU processing module, a first wireless communication module and a first protective shell; when the leakage liquid of the bridge deck flows into the primary detection early warning unit, the liquid dielectric constant detection sensor is contacted at first, the dielectric constant of the leakage liquid is detected, data are transmitted to the first CPU processing module after detection, the first CPU processing module compares the dielectric constant of the leakage liquid of the bridge deck with the rain and snow dielectric constant pre-stored in the first storage module, and if the difference between the dielectric constant of the leakage liquid of the bridge deck and the rain and snow dielectric constant is greater than or equal to a threshold value, the first CPU processing module instructs the first wireless communication module to send an early warning signal; if the difference between the dielectric constant of the bridge deck leakage liquid and the dielectric constant of the rain and snow is smaller than a threshold value, the first CPU processing module instructs the first wireless communication module to send an inlet valve opening signal to the second wireless communication module of the secondary detection early warning unit; the secondary detection early warning unit comprises a liquid conductivity detection sensor, a PH value detection sensor, a liquid density detection sensor, a second storage module pre-stored with normal values of detection indexes, a second CPU processing module, a second wireless communication module, a second protective shell and a liquid guide pipe in the secondary detection early warning unit; the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor are arranged at an inlet valve of the secondary detection early-warning unit and are respectively connected with the second CPU processing module; the control end of the inlet valve is connected with the second CPU processing module, and the inlet valve is arranged at the middle point of four sides of the protective shell; when the second wireless communication module receives an inlet valve opening signal transmitted by the first wireless communication module, the second CPU processing module instructs to control the inlet valve to be opened; the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor are used for detecting leakage liquid of the bridge deck after the inlet valve is opened, and when the difference between the detection values of the liquid conductivity detection sensor, the PH value detection sensor and the liquid density detection sensor and the normal value stored in the second storage module is larger than a threshold value, the second CPU processing module instructs the second wireless communication module to send an early warning signal; the external shape of the secondary detection early warning unit is a groove, and the secondary detection early warning unit is arranged around the water drain port and is provided with a sensor group in the protective shell; when the inlet control valve is opened, the liquid flows in, and then is detected immediately, and flows to the liquid guide pipes on two sides after detection.
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| CN201910740049.3A CN110609063B (en) | 2019-08-12 | 2019-08-12 | Liquid dangerous chemicals leakage bridge deck induction detection early warning device |
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| CN201910740049.3A CN110609063B (en) | 2019-08-12 | 2019-08-12 | Liquid dangerous chemicals leakage bridge deck induction detection early warning device |
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