CN220038211U

CN220038211U - Multi-point type pipe network groundwater infiltration monitoring device based on temperature

Info

Publication number: CN220038211U
Application number: CN202321383875.5U
Authority: CN
Inventors: 陈瑞弘; 郭宇峰; 李彤; 许王辰; 郭旻睿; 郑小东; 徐昊旻
Original assignee: Three Gorges Smart Water Technology Co ltd
Current assignee: Three Gorges Smart Water Technology Co ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-11-17
Anticipated expiration: 2033-06-02

Abstract

The utility model provides a multi-point type pipe network underground water infiltration monitoring device based on temperature, which comprises: a waterproof case; the control device is arranged inside the waterproof shell; the control device is electrically connected with a cable, and the cable extends out of the waterproof shell; a power supply inside the waterproof case; the temperature probes are arranged on the cable at intervals, and the signal output end of each temperature probe is connected with the signal input end of the control device; the temperature monitoring is carried out on the multi-section positions of the pipeline through a plurality of temperature probes, so that the monitoring precision of the pipeline state is enhanced. The utility model adopts a temperature monitoring scheme, has good anti-pollution and anti-interference performance and high monitoring and sensing precision. Through the monitoring to the temperature in the well pipeline, whether there is external water to get into in the well pipeline according to the temperature change of monitoring. And a parallel temperature monitoring mode is adopted to realize the monitoring of the whole pipe section. The temperature monitoring is carried out on the multi-section positions of the pipeline through the temperature probes, so that the monitoring precision of the pipeline state is enhanced.

Description

Multi-point type pipe network groundwater infiltration monitoring device based on temperature

Technical Field

The utility model relates to the technical field of municipal monitoring and analysis, in particular to a multi-point type pipe network groundwater infiltration monitoring device based on temperature.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The drainage pipe network is an important infrastructure of a city, and the safety and stability of the drainage pipe network plays an extremely important role in the normal operation of the city. Due to historical reasons, the quality of the current domestic pipe network is generally poor, the situation of misconnection, missed connection and disordered connection is serious, the normal operation of the drainage pipe network is greatly influenced, and meanwhile, the quality of the water environment is also greatly and negatively influenced.

The monitoring of the pipe flow state of the sewage pipe network has important significance for supporting the normal operation of the sewage pipe network, the transformation of the pipe network and the daily operation and maintenance work, reducing the overflow of sewage and improving the water quality of the sewage plant.

At present, the monitoring of the pipe flow state of a sewage pipe network mainly adopts a comprehensive pollutant mode represented by liquid level, flow and COD, such as biochemical indexes of ammonia nitrogen. However, the equipment cost of the mode is high, the monitoring probe is easily affected by sewage, the problems of low service life of the probe, low monitoring precision (ageing of the probe and attachment of dirt on the probe) and even low monitoring precision (hanging of the probe and damage of the probe) exist, and effective monitoring data are difficult to provide for a sewage pipe network.

Meanwhile, the comprehensive pollutant mode represented by liquid level, flow and COD is difficult to meet the high-frequency monitoring requirement of a pipe network due to high monitoring energy consumption and limited monitoring frequency, and the sudden problem (such as short-time rainfall event) of part of the pipe network due to low monitoring frequency cannot be captured, so that the follow-up pipe network state monitoring and analyzing work is influenced.

Disclosure of Invention

The utility model provides a multi-point type pipe network groundwater infiltration monitoring device based on temperature, which aims to solve the problem of low monitoring precision in the current monitoring of the pipe flow state of a sewage pipe network.

The technical scheme of the utility model is realized as follows:

a temperature-based multipoint pipe network groundwater infiltration monitoring device, comprising:

a waterproof case;

the control device is arranged inside the waterproof shell; the control device is electrically connected with a cable, and the cable extends out of the waterproof shell;

the power supply is arranged inside the waterproof shell;

the temperature probes are arranged on the cable at intervals, and the signal output end of each temperature probe is connected with the signal input end of the control device; and the temperature monitoring is carried out on the multi-section positions of the pipeline through a plurality of temperature probes so as to enhance the monitoring precision of the pipeline state.

According to the further optimized technical scheme, the water inlet sensing assembly is arranged on the temperature probe and used for detecting whether the temperature probe is positioned in pipeline water or not, and a signal output end of the water inlet sensing assembly is connected with a signal input end of the control device.

Further optimizing technical scheme, go into water perception subassembly including setting up two electric capacity rings in temperature probe left and right sides respectively, two electric capacity rings are connected to the different electrodes of power respectively, form electric capacity between two electric capacity rings, are provided with hydrophobic coating between the electric capacity ring.

According to the technical scheme, a heat conduction shell used for protecting the temperature probe is arranged on the periphery of the temperature probe.

Further optimizing the technical scheme, the cable is connected with a plurality of floats;

and/or the distance between the two floats is 0.5m-5m;

and/or the cable is formed by sequentially connecting a plurality of sections of branch cables, and the connection parts of two adjacent branch cables are arranged in the floater through aviation plugs.

Further optimizing the technical scheme, the head end of cable is provided with the LED lamp.

By adopting the technical scheme, the utility model has the beneficial effects that:

1. the multipoint pipe network groundwater infiltration monitoring device based on the temperature provided by the utility model adopts a temperature monitoring scheme, and has good anti-pollution and anti-interference performance and high monitoring sensing precision. When the pipe network is damaged or leaked, groundwater positioned outside the pipe network can enter. The temperature of the groundwater is lower than the temperature of the sewage in the pipeline in the well. Therefore, through monitoring the temperature in the well pipeline, whether external water enters the well pipeline or not is judged according to the monitored water temperature change. And a parallel temperature monitoring mode is adopted to realize the monitoring of the whole pipe section. The temperature monitoring is carried out on the multi-section positions of the pipeline through the temperature probes, so that the monitoring precision of the pipeline state is enhanced.

2. The utility model provides a temperature-based multipoint pipe network groundwater infiltration monitoring device, which is characterized in that a monitoring probe is provided with a water inlet sensing component, and whether the probe is in water inlet sensing is realized through a capacitance state.

3. According to the temperature-based multipoint type pipe network groundwater infiltration monitoring device, the cables are formed by sequentially connecting the plurality of sections of branch cables, and the connection parts of the two adjacent branch cables are arranged in the floater through the aviation plug, so that the two adjacent branch cables are connected through the aviation plug, and the monitoring density and the monitoring length can be customized.

4. According to the temperature-based multipoint pipe network groundwater infiltration monitoring device, the LED lamps are arranged at the head ends of the cables, so that whether the cables extend to the next inspection well or not can be ensured, and the cables cannot be blocked in the middle.

5. According to the temperature-based multipoint pipe network groundwater infiltration monitoring device, provided by the utility model, the aviation plug and the floater are arranged, so that the device is prevented from sinking, and can drift to reach the next inspection well under the action of pipeline water flow.

6. According to the temperature-based multipoint pipe network groundwater infiltration monitoring device, the capacitance is in series connection with the capacitance, and whether all monitoring nodes are in water can be confirmed through equivalent capacitance calculation.

7. According to the temperature-based multipoint pipe network groundwater infiltration monitoring device, floats are arranged on two sides of the temperature probe, the temperature probe does not have buoyancy, and naturally sags under the action of gravity, so that the temperature probe is ensured to be submerged in water.

8. According to the temperature-based multipoint pipe network groundwater infiltration monitoring device provided by the utility model, the abnormal monitoring points can be removed by linear regression of data among the temperature probes due to the fact that the intervals among the temperature probes are not far.

9. The utility model provides a temperature-based multipoint pipe network groundwater infiltration monitoring device, which is arranged downstream and has smooth transition.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a temperature-based multi-point type pipe network groundwater infiltration monitoring device according to the present utility model.

Fig. 2 is a front view of a temperature-based multi-point pipe network groundwater infiltration monitoring device according to the utility model.

Fig. 3 is a schematic diagram of an inner tank layer structure of a temperature-based multipoint pipe network groundwater infiltration monitoring device according to the utility model.

Fig. 4 is a schematic diagram of a waterproof shell structure of a multi-point type pipe network groundwater infiltration monitoring device based on temperature.

Fig. 5 is a schematic connection diagram of a segmented cable after a float of the temperature-based multi-point pipe network groundwater infiltration monitoring device is broken away.

Fig. 6 is a practical installation diagram of a temperature-based multipoint pipe network groundwater infiltration monitoring device according to the utility model.

FIG. 7 is a graph showing a regression model of water temperature along Cheng Dianwei constructed in accordance with the present utility model.

FIG. 8 is a graph showing a regression model of water temperature along Cheng Dianwei constructed in accordance with the present utility model.

FIG. 9 is a regression model with maximum deviation values removed when the linear fitness of the data of the present utility model is less than 0.8.

FIG. 10 is a regression model of the present utility model when re-correcting error points.

FIG. 11 shows a graph of the regression model of edge Cheng Dianwei-water temperature with external water mixing according to the present utility model.

FIG. 12 is a graph showing the regression model of the water temperature along Cheng Dianwei-when the groundwater is mixed.

FIG. 13 is a schematic diagram of the structure between the temperature probe and the capacitive ring according to the present utility model.

Fig. 14 is a flowchart of the operation of the present utility model.

Fig. 15 is a circuit connection diagram of the LED lamp and the temperature probe according to the present utility model.

Fig. 16 is a circuit diagram of the connection between capacitors according to the present utility model.

Wherein: 1. waterproof shell, 2, interior slot layer, 3, power, 4, temperature probe, 41, temperature probe casing, 5, float, 6, electric capacity ring, 7, cable, 8, inspection shaft, 9, pipeline, 10, aviation plug, 11, LED lamp, 12, link, 13, couple, 14, hydrophobic coating, 15, heat conduction glue.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

A temperature-based multipoint pipe network groundwater infiltration monitoring device, which is shown in connection with fig. 1 to 16, comprises a waterproof shell 1, a control device, a power supply and a temperature probe 4.

An inner groove layer 2 is arranged in the waterproof shell 1, and a control device mounting groove and a power supply mounting groove are arranged on the inner groove layer 2.

The control device is arranged inside the waterproof shell 1 and is a chip; the controller is electrically connected with a cable 7 through an aviation plug 10, and the cable 7 extends out of the waterproof shell 1.

The power supply 3 is arranged in a power supply installation groove of the inner groove layer 2 and is used for supplying power to the whole device.

The temperature probes 4 are arranged in a plurality, the temperature probes 4 are arranged on the cable 7 at intervals, and the signal output end of the temperature probe 4 is connected with the signal input end of the control device; the temperature monitoring is carried out on the multi-section positions of the pipeline through a plurality of temperature probes 4 so as to enhance the monitoring precision of the pipeline state.

The utility model judges the running state of the well pipeline by monitoring the temperature of the well pipeline. Under normal conditions, the inside of the pipeline in the well is used for generating sewage, receiving water sources such as bath water, a closestool, dishes and the like, and the temperature in the pipeline is generally higher than the ambient temperature.

When the pipe network is damaged or leaked, groundwater located outside the pipe network enters. The groundwater temperature is lower than the sewage in the well pipeline. Therefore, through monitoring the temperature in the well pipeline, whether external water enters the well pipeline or not is judged according to the monitored water temperature change.

The main reason for monitoring the temperature of the pipeline in the well is that the temperature monitoring accuracy is high on one hand, and the technology is simple and the cost is low on the other hand.

The periphery of the temperature probe is provided with a heat conducting shell, and preferably, the heat conducting shell is a stainless steel clamping sleeve for protecting the temperature probe inside.

The temperature probe is provided with more than three sections, and under normal conditions, the interval between every two sections of temperature probes is 0.5m to 5 m. The length of the pipe is from ten meters to several tens of meters.

The interval between the temperature probes can not be too far, and the carding of data is realized through the abnormal jump of each temperature probe, so that the monitoring precision of the temperature probes is improved. For example, 3 temperature probes exist, the temperature detected by the temperature probes at two sides is 20 ℃, the temperature detected by the temperature probe in the middle is 23 ℃, and the temperature difference among all monitoring points cannot be too large because water flows along the pipeline, so that the temperature value detected by the temperature probe in the middle is removed.

When the pipeline leaks water, the underground water can enter the pipeline, and the temperature of the underground water is lower than that of sewage in the pipeline. In a branch-free closed pipeline, only a sudden drop in temperature along the pipeline section is possible, and no sudden change in temperature (i.e. a situation in which the temperature is reduced after being increased) is possible. The multi-probe monitoring scheme can improve the overall monitoring accuracy according to the change rule of the water temperature along the pipe network.

When the temperature probe is placed in the well, the position of the temperature probe cannot be seen, and whether the temperature probe is in water cannot be known. In order to solve the technical problem, the pipeline of the temperature probe is provided with the water inlet sensing component, and the signal output end of the water inlet sensing component is connected with the signal input end of the controller device.

The temperature probe 4 in the present utility model is provided inside the temperature probe housing 41, and the inside of the temperature probe 4 is filled with the heat conductive adhesive 15.

The water inlet sensing assembly comprises two capacitance rings 6 which are respectively arranged at the left side and the right side of the temperature probe 4, the two capacitance rings 6 are respectively connected to different electrodes of a power supply, capacitance is formed between the two capacitance rings 6, hydrophobic coating is coated between the capacitance rings, the hydrophobic coating forms a hydrophobic coating 14, and the problem that capacitance monitoring is wrong due to splashing and surface wetting can not occur between the capacitance rings in air is guaranteed. More specifically, a hydrophobic coating is applied to the outer surface of the temperature probe housing 41. Two capacitive rings 6 are provided on the left and right sides of the temperature probe housing 41.

The capacitive ring is used for monitoring whether the temperature probe of the specific section is submerged or not, and the capacitive ring is not required to be wholly submerged in water and only needs to be soaked in water. When the capacitor is in an air state, an air medium is arranged between the two capacitor rings, and the two capacitor rings output a voltage value; when water is encountered, the water has a certain conductive effect, and the voltage between the two capacitor rings can be changed. The temperature probe is confirmed to be operated in air or in water by recognizing the difference of the voltages.

The capacitance and the capacitance are in series connection, and whether all monitoring nodes are in water can be confirmed through equivalent capacitance calculation, so that whether the monitored temperature probes are exposed outside the water can be judged. The equivalent capacitance calculation formula is:

1/C _eq ＝1/C ₁ +1/C ₂ +……+1/C _N

wherein C is ₁ 、C ₂ ……C _N The capacitance between the two capacitive rings, respectively.

Capacitance C between two capacitive rings ₁ 、C ₂ ……C _N There may be two values, one being the capacitance of the medium being sewage and one being the capacitance of the medium being air. C (C) ₁ 、C ₂ ……C _N Various combinations of capacitors exist, and it is judged that a plurality of capacitors are in water and a plurality of capacitors are in air through equivalent capacitance values. For example, C ₁ ＝1uF，C ₂ ＝10uF，1/C _eq =1+0.1=1.1; for example, C ₁ ＝10uF，C ₂ ＝10uF，1/C _eq =0.1+0.1=0.2. And judging the state of each capacitor by comparing the magnitude difference of the last calculated values.

The cable 7 is connected with a plurality of floats 5, and the distance between the two floats is 0.5m-5m, which is not too short.

The float embedded aviation plug can be disassembled at will, and the number of the joints can be increased as required. The floats are divided into a male float and a female float, the lower ends of the floats are respectively provided with a balancing weight, a metal contact is arranged in the middle of the floats, the metal contact is guaranteed not to be positioned at the bottommost end, and a capacitor is formed by the contacts between the male float and the female float.

Because both sides of each temperature probe are provided with floats, in order to ensure that the temperature probes are soaked into water, the heat conduction shell has a certain weight, and then the temperature probes positioned between the two floats are settled into the water.

The head end of the cable 7 is provided with an LED lamp 11, and when the device is installed, the release condition of the whole device is judged by monitoring the position of the LED lamp 11 through a QV device (periscope device).

The end of the waterproof shell 1 is provided with a hanging ring 12, and the inner side wall of the inspection well 8 is provided with a hook 13 matched with the hanging ring.

As shown in fig. 14, the specific workflow of the present utility model is as follows:

and reading probe data through the Internet of things, and constructing an along-path change and linear regression formula based on the probe along-path number.

As shown in fig. 7, the linear fitting degree of the data reaches more than 0.8, and the whole data is reliable.

As shown in fig. 8, the linear fitting degree of the data is not more than 0.8, and a deviation point may exist. And calculating the estimated water temperature according to a regression formula, calculating the deviation by combining the measured water temperature, and discarding the maximum deviation value.

Regression analysis was again performed, as shown in fig. 9, again to determine if the linear fitness of the data reached above 0.8, and if so, the overall data was authentic. And the error point is again corrected according to the fitted line, as shown in fig. 10.

If there is external water mixing, the temperature profile will exhibit a downward translational tendency after the mixing point, as shown in FIG. 11. A determination is made by the difference between the data points.

As shown in fig. 12, the point 7 is a ground water mixing point. And (5) taking the mixed junction point as a boundary, and separating the temperature along-way change data of the front and rear positions. Substituting the temperature correction method again to further check the temperature accuracy.

If the corresponding continuous temperature section is less than 4 data single points, the temperature distribution density is adjusted, and the data fitting accuracy is ensured. And repeating the foregoing operation.

Example 2

The embodiment discloses a temperature-based multipoint pipe network groundwater infiltration monitoring method, which comprises the following steps:

a temperature-based multipoint network groundwater infiltration monitoring device of example 1 was installed in an inspection well.

The temperature consistency calibration is firstly carried out, and the common temperature is changed step by step, so that abrupt increase and abrupt decrease can not occur.

And judging the effectiveness of the data through the regression relationship of the upper point and the lower point.

In the temperature monitoring process, if the temperature monitored by the temperature probes is wholly reduced from a certain node, the problem of the pipe wall between the two temperature probes can be judged, and external water is judged to be mixed in the temperature monitoring process; and the staff overhauls and maintains the pipe wall at the position.

When the device is installed in a non-full pipe inspection well, water flow in the inspection well is relatively fast, at the moment, the selected floater density is relatively small, and the buoyancy force is relatively large. The method comprises the following specific steps:

the QV device is first placed in the manhole. QV detection is a rapid detection technology, a high-definition probe with adjustable focal length is placed in an inspection well by using a control rod with adjustable length, and workers record and store internal images of detected objects on the ground in real time through a main controller.

And (5) placing the cables into the pipeline step by step. The left end of the cable is placed in the inspection well and stretches into the pipeline 9 by the holding part of the handheld waterproof shell, the LED lamp at the end part of the cable is lighted, and the QV device detects the state of the LED lamp. The cable is slowly placed in the pipeline 9 in an extending way, and after the cable is placed in an extending way, the left-most floater contacts with the water surface and floats on the water surface because the left-most side of the cable is lighter. After the QV device monitors that the first float is in a floating state, the cable is slowly placed into the pipeline 9 again, and the next float is placed into the pipeline 9. After the QV device monitors that the second float is in a floating state, the cable is slowly extended into the pipeline 9 again, and the third float is placed into the pipeline 9. And (3) sequentially circulating, placing each floater into the inspection well and the pipeline, and flushing the floaters by water flow in the pipeline to move to the downstream of the pipeline along with the water flow.

It should be noted that the cable release process should not be too fast, which easily causes the cables to bend and wind together.

Finally, the waterproof shell is hung on the well wall, as shown in fig. 6.

When the device is installed in a full pipe inspection well (namely an inspection well filled with water), floats are matched, the mass of the floats is matched with the mass of a cable, at the moment, the selected floats are relatively high in density, and the buoyancy is relatively low.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. Multi-point type pipe network groundwater infiltration monitoring devices based on temperature, characterized by, include:

a waterproof case (1);

the control device is arranged inside the waterproof shell (1); the control device is electrically connected with a cable (7), and the cable (7) extends out of the waterproof shell (1);

the power supply is arranged inside the waterproof shell (1);

a plurality of temperature probes (4), wherein each temperature probe (4) is arranged on the cable (7) at intervals, and the signal output end of each temperature probe (4) is connected with the signal input end of the control device; and the temperature monitoring is carried out on the multi-section positions of the pipeline through a plurality of temperature probes (4) so as to enhance the monitoring precision of the pipeline state.

2. The temperature-based multipoint pipe network groundwater infiltration monitoring device according to claim 1, wherein a water inlet sensing assembly is arranged on the temperature probe (4), the water inlet sensing assembly is used for detecting whether the temperature probe (4) is in pipeline water, and a signal output end of the water inlet sensing assembly is connected with a signal input end of the control device.

3. The temperature-based multipoint pipe network groundwater infiltration monitoring device according to claim 2, wherein the water-inflow sensing assembly comprises two capacitance rings (6) respectively arranged at the left side and the right side of the temperature probe (4), the two capacitance rings (6) are respectively connected to different electrodes of a power supply, a capacitance is formed between the two capacitance rings (6), and a hydrophobic coating (14) is arranged between the capacitance rings.

4. A temperature-based multipoint pipe network groundwater infiltration monitoring device according to claim 1, characterized in that the temperature probe is peripherally provided with a heat conducting housing for protecting the temperature probe (4).

5. A temperature-based multipoint pipe network groundwater infiltration monitoring device according to claim 1, characterized in that the cable (7) is provided with a plurality of floats (5) in a connecting manner;

and/or the distance between the two floats is 0.5m-5m;

and/or the cable is formed by sequentially connecting a plurality of sections of branch cables, and the connection parts of two adjacent branch cables are arranged in the floater (5) through the aviation plug (10).

6. A temperature-based multipoint pipe network groundwater infiltration monitoring device according to claim 1, characterized in that the head end of the cable (7) is provided with an LED lamp (11).