CN115327057B - Acoustic water quality detection device - Google Patents
Acoustic water quality detection device Download PDFInfo
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- CN115327057B CN115327057B CN202210947505.3A CN202210947505A CN115327057B CN 115327057 B CN115327057 B CN 115327057B CN 202210947505 A CN202210947505 A CN 202210947505A CN 115327057 B CN115327057 B CN 115327057B
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- water
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- baffle
- water quality
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 239000000523 sample Substances 0.000 claims abstract description 49
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 238000011010 flushing procedure Methods 0.000 claims abstract description 9
- 238000012372 quality testing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 description 13
- 239000013049 sediment Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 5
- 241000233866 Fungi Species 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000009360 aquaculture Methods 0.000 description 2
- 244000144974 aquaculture Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1886—Water using probes, e.g. submersible probes, buoys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The embodiment of the invention provides an acoustic water quality detection device, which comprises a probe and a water baffle, wherein the probe is an ultrasonic detection probe, the water baffle is in a triangular cone shape, one side of the conical tip of the water baffle is a water facing side, the other side of the water baffle is a water backing side, the water backing side is provided with an arc groove, and the probe is inserted into the water facing side and is close to the water backing side; the water retaining piece is provided with flushing holes from the water facing side to the two sides of the water backing side. The water quality detection device and the water quality detection method provided by the invention have the advantages that the complexity of equipment is reduced, the stability and the reliability of equipment detection are improved, the water quality detection of areas which do not need to accurately detect the water quality is realized in a pre-estimated mode, and the similar principle is adopted for cleaning and detection, so that part of circuits can be shared, and the electric control cost is saved.
Description
Technical Field
The invention relates to the technical field of acoustic detection, in particular to a water quality detection device.
Background
The water quality monitoring comprises the fields of water source monitoring, environmental protection monitoring stations, municipal water treatment process, municipal pipe network water quality supervision, rural tap water monitoring, circulating cooling water, swimming pool water operation management, industrial water source recycling, industrial aquaculture and the like. In terms of monitoring principle, the current common mode is an electrode method and a photometry method, and the online real-time monitoring of water quality is realized by combining a detecting probe with a water taking system, a preprocessing system, a data acquisition control system and the like.
However, at present, although the monitoring has various obtained data and is thorough enough in analysis, the processing data is huge, the equipment cost is high, the maintenance cost is not very good, and the maintenance workload is high especially when the monitoring is used in the field.
In order to timely clean dirt and siltation in monitoring equipment, ultrasonic cleaning structures are designed in many equipment, and the equipment can be maintained through continuous vibration cleaning. In addition, although the monitoring device detects parameters such as dissolved oxygen, turbidity, pH value, conductivity, water temperature and the like of the water body, continuous monitoring of the same flowing area does not need all data, such as dissolved oxygen, which can be important for aquaculture, but is not necessarily needed for other purposes, and the traditional electrode method increases along with the loss error of the electrode, so that the monitoring reliability is reduced due to pollution of the device. Of course, there is also a method for detecting the thickness by using an ultrasonic sensor, for example, CN201910053920.2, a method and apparatus for prompting dirt in a washing machine, a storage medium and a washing machine, wherein the ultrasonic sensor is used to realize a similar function of a turbidity sensor to detect the thickness of dirt in the washing machine.
Disclosure of Invention
The embodiment of the invention provides an acoustic water quality detection device which utilizes an ultrasonic detection mode to continuously monitor the sewage accumulation thickness so as to estimate the water quality condition. The detection and the cleaning adopt the same principle, so that the electric control cost is saved, the subsequent maintenance is convenient, the cost of the whole device is low, and the maintenance is convenient.
On one hand, the embodiment of the invention provides an acoustic water quality detection device, which comprises a probe and a water baffle, wherein the probe is an ultrasonic detection probe, the water baffle is in a triangular cone shape, one side of a cone tip of the water baffle is a water facing side, the other side of the water baffle is a water backing side, the water backing side is provided with an arc groove, and the probe is inserted into the water facing side and is close to the water backing side; the water retaining piece is provided with flushing holes from the water facing side to the two sides of the water backing side.
Preferably, the diameter of one end of the flushing hole close to the water facing side is larger than that of one end of the back water side, so that the impact force of water flow is improved to flush away large reverse flow impurities.
Specifically, the arc-shaped groove section of the back water side is semi-elliptical, and a negative pressure area is formed on the back water side, so that bacteria and sediment can be conveniently enriched.
Preferably, both sides of the water retaining piece are arc-shaped, and a negative pressure area on the back water side is further formed.
Specifically, the two sides of the back water side of the water retaining piece are provided with bevel edges, and the impact of the backwater water directly to the central part of the back water side is relieved.
The fixing rod is arranged at the end of the water-facing side of the water-retaining member, so that the water-retaining member is convenient to install and fix in the middle of water flow.
The fixed rod and the water retaining piece are arranged at 90 degrees, so that the blocking of water flow in front of the fixed rod is avoided, and interference to a negative pressure area on the back water side is avoided.
The probe is transversely inserted into the water facing side, the probe head is provided with the ultrasonic transmitting unit and the ultrasonic receiving unit, the diameters of the probes are sequentially small, and the probe head is convenient to detect and control when the probe head can alternately transmit and receive monitoring.
The probe is obliquely inserted into the water facing side, the head of the probe is close to the back water side, a cleaning unit is arranged on one side of the probe close to the back water side, and an ultrasonic transmitting unit and an ultrasonic receiving unit are arranged on one side of the cleaning unit far from the back water side.
The probe comprises the cleaning ultrasonic probe and the thickness detection ultrasonic probe, can simultaneously meet the double requirements of cleaning and detection, and can be cleaned once at intervals.
In another aspect, the present invention provides an acoustic water quality detection method, including:
forming a dirt layer, and utilizing the water retaining piece to manufacture a negative pressure area so as to facilitate sediment accumulation and fungus propagation;
emitting sound waves, and transmitting ultrasonic signals to the dirt layer by utilizing an ultrasonic transmitting unit;
detecting echo, and receiving ultrasonic signals reflected by the dirt layer by using an ultrasonic receiving unit;
and (3) calculating and analyzing, namely judging the turbidity of water quality and the propagation condition of fungus by using the thickness of the dirt layer deposited in the detection period, and simply judging the water quality change condition.
More preferably, after each detection period, ultrasonic cleaning of the dirt is performed on the dirt layer by using a cleaning ultrasonic probe.
The acoustic water quality detection device provided by the invention has the following advantages:
the water quality detection device and the water quality detection method provided by the invention have the advantages that the complexity of equipment is reduced, the stability and the reliability of equipment detection are improved, the water quality detection of areas which do not need to accurately detect the water quality is realized in a pre-estimated mode, and the similar principle is adopted for cleaning and detection, so that part of circuits can be shared, and the electric control cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of an acoustic water quality detection device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an acoustic water quality testing apparatus according to an embodiment of the present invention;
FIG. 3 is a second cross-sectional view of an acoustic water quality testing apparatus according to an embodiment of the present invention;
FIG. 4 is a side view of an acoustic water quality testing apparatus according to an embodiment of the present invention;
FIG. 5 is a flow chart of an acoustic water quality detection method provided by an embodiment of the invention;
fig. 6 is an equivalent circuit diagram of a piezoelectric ceramic element of a probe according to an embodiment of the present invention.
In FIGS. 1-4, 1-water baffle, 2-flushing hole, 3-back water side, 4-probe, 5-fixing rod.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1 Acoustic Water quality detection device
Referring to fig. 1-4, an acoustic water quality detection device provided by the embodiment of the invention comprises an ultrasonic detection probe 4 and a water baffle 1, wherein the water baffle 1 is in a triangular cone shape, one side of the cone tip of the water baffle 1 is a water facing side, the other side of the water baffle 1 is a water carrying side 3, the water carrying side 3 is provided with an arc groove, and the probe 4 is inserted into the water facing side and is close to the water carrying side 3; the water retaining piece 1 is provided with a flushing hole 2 from the water facing side to the two sides of the direction of the back water side 3, the diameter of one end of the flushing hole 2 close to the water facing side is larger than that of one end of the back water side 3, and because branches, leaves and the like can be flushed into the grooves of the back water side 3 due to vortex, impurities can be flushed away through the flushing hole 2.
The arc-shaped groove section of the back water side 3 of the embodiment is semi-elliptical, and experiments show that the semi-elliptical is faster than the circular or other arc-shaped interface sediment enrichment, which is probably because the arc-shaped groove section is semi-elliptical, and a negative pressure area is formed on the back water side, so that bacteria and sediment enrichment is more convenient.
In this embodiment, the two sides of the water baffle 1 are arc-shaped, and further form a negative pressure area on the back water side 3.
The two sides of the water back side 3 of the water retaining device 1 of the embodiment are provided with bevel edges, so that a horn mouth is formed, the impact of the backwater water directly towards the central part of the water back side 3 is relieved, and the silt enrichment is facilitated.
The end of the water-facing side of the water retaining piece 1 is provided with the fixing rod 5 which is 90 degrees with the water retaining piece 1, so that the water retaining piece is conveniently installed and fixed in the middle of water flow, and the blocking of the water flow in the front installation can be avoided, and the interference to the negative pressure area of the back water side 3 is avoided.
The probe 4 is transversely inserted into the water facing side, the head of the probe 4 is provided with the ultrasonic transmitting unit and the ultrasonic receiving unit, the diameters of the probes are sequentially small, and the detection control is convenient when the transmission and the receiving monitoring can be alternately performed.
The ultrasonic transmitting unit and the ultrasonic receiving unit of the probe 4 adopt piezoelectric ceramic plates with PZT-8 components metallized on two sides.
The driving circuit and the signal detection circuit adopted in the testing process of the embodiment are all commonly used piezoelectric ceramic circuits, the signals are obtained through market purchase, and the signals obtained by the ultrasonic receiving unit can reflect the thickness and the compactness of the sediment accumulation layer. The sediment quantity, namely turbidity, in the corresponding time period can be reflected through the thickness due to the detection of the fixed time, if bacteria are attached, a sticky pasty layer can be formed, the ultrasonic signal of the pasty layer is different from the ultrasonic echo signal of the sediment accumulation layer, and the bacteria propagation condition can be fed back, so that a certain reference is provided for sterilization. In general, the method utilizes the condition that sediment and bacteria are often deposited in the water quality online detection box body, and roughly provides a reference for the water quality condition by detecting and quantifying the sediment amount and the bacterial propagation speed in the water quality.
Example 2 Acoustic Water quality detection device
Unlike embodiment 1, the probe 4 is inserted obliquely into the water-facing side, the head of the probe 4 is close to the back water side, a cleaning unit is provided on the side of the probe close to the back water side, and an ultrasonic transmitting unit and an ultrasonic receiving unit are provided on the side of the cleaning unit away from the back water side.
Moreover, the probe 4 of the embodiment comprises a cleaning ultrasonic probe and a thickness detection ultrasonic probe, can simultaneously meet the double requirements of cleaning and detection, and ensures that the probe can be cleaned once at intervals.
Example 3 Acoustic Water quality detection method
The invention provides an acoustic water quality detection method, which comprises the following steps:
forming a dirt layer, and utilizing the water retaining piece to manufacture a negative pressure area so as to facilitate sediment accumulation and fungus propagation;
emitting sound waves, and transmitting ultrasonic signals to the dirt layer by utilizing an ultrasonic transmitting unit;
detecting echo, and receiving ultrasonic signals reflected by the dirt layer by using an ultrasonic receiving unit;
and (3) calculating and analyzing, namely judging the turbidity of water quality and the propagation condition of fungus by using the thickness of the dirt layer deposited in the detection period, and simply judging the water quality change condition.
In this embodiment, after each detection period, ultrasonic cleaning of the dirt layer is performed by using a cleaning ultrasonic probe.
The cleaning ultrasonic probe of the embodiment adopts a transducer made of piezoelectric ceramics of common PZT-4 material.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. The acoustic water quality detection device is characterized by comprising a probe and a water baffle, wherein the probe is an ultrasonic detection probe, the water baffle is in a triangular cone-like shape, one side of a cone tip of the water baffle is a water facing side, the other side of the water baffle is a water back side, the water back side is provided with an arc groove, and the probe is inserted into the water facing side and is close to the water back side; the water retaining piece is provided with flushing holes from the water facing side to the two sides of the water backing side;
the diameter of one end of the flushing hole close to the water facing side is larger than that of one end of the back water side;
the section of the arc-shaped groove on the back water side is semi-elliptical;
the probe comprises a cleaning ultrasonic probe and a thickness detection ultrasonic probe;
both sides of the water baffle are arc-shaped;
the two sides of the water back side of the water retaining piece are provided with bevel edges;
the end head of the water baffle on the water facing side is provided with a fixed rod, the head of the probe is close to the back water side, one side of the probe close to the back water side is provided with a cleaning unit, and one side of the cleaning unit far away from the back water side is provided with an ultrasonic transmitting unit and an ultrasonic receiving unit;
the body of water is a flowing body of water.
2. The apparatus of claim 1, wherein the fixed rod is disposed at 90 ° to the water deflector.
3. An acoustic water quality testing device according to claim 1, wherein the probe is inserted laterally into the water facing side.
4. An acoustic water quality testing device according to claim 1, wherein the probe is inserted obliquely into the water-facing side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947505.3A CN115327057B (en) | 2022-08-09 | 2022-08-09 | Acoustic water quality detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210947505.3A CN115327057B (en) | 2022-08-09 | 2022-08-09 | Acoustic water quality detection device |
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| Publication Number | Publication Date |
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| CN115327057A CN115327057A (en) | 2022-11-11 |
| CN115327057B true CN115327057B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210947505.3A Active CN115327057B (en) | 2022-08-09 | 2022-08-09 | Acoustic water quality detection device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2777354A1 (en) * | 1998-04-10 | 1999-10-15 | Seres | Turbidity probe for checking effluent discharges |
| JP2004028803A (en) * | 2002-06-26 | 2004-01-29 | Non-Destructive Inspection Co Ltd | Measuring method of deposit on inside face of pipe |
| CN1844908A (en) * | 2006-03-20 | 2006-10-11 | 天津工业大学 | Ultrasonic wave detection method and detection apparatus therefor |
| WO2006106402A2 (en) * | 2005-04-05 | 2006-10-12 | Ht-Idea S.R.L. | A device and method for measuring the thickness of a layer of a substance or material deposited on a section of road, and a monitoring system comprising said device |
| CN101936871A (en) * | 2010-08-12 | 2011-01-05 | 中国水产科学研究院淡水渔业研究中心 | Method for detecting pollutant production coefficient of deposit in cultivation pond |
| CN105548141A (en) * | 2016-01-22 | 2016-05-04 | 中国科学院城市环境研究所 | Method for online monitoring of pollutants in water |
| CN207076183U (en) * | 2017-07-14 | 2018-03-09 | 上海翱途流体科技有限公司 | Dirt concentration sensor and ultrasonic wave automatic sewage discharging device in a kind of ultrasonic wave recirculated water |
| CN110054384A (en) * | 2019-05-24 | 2019-07-26 | 济南市莱芜雪野水库管理处 | A kind of water body purification structure for river sludge processing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7523648B2 (en) * | 2007-02-14 | 2009-04-28 | Schlumberger Technology Corporation | Apparatus and methods for solids deposition and analysis |
| CA2859791C (en) * | 2011-12-22 | 2018-10-23 | Ashland Licensing And Intellectual Property Llc | Method and device for detecting and analyzing deposits |
-
2022
- 2022-08-09 CN CN202210947505.3A patent/CN115327057B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2777354A1 (en) * | 1998-04-10 | 1999-10-15 | Seres | Turbidity probe for checking effluent discharges |
| JP2004028803A (en) * | 2002-06-26 | 2004-01-29 | Non-Destructive Inspection Co Ltd | Measuring method of deposit on inside face of pipe |
| WO2006106402A2 (en) * | 2005-04-05 | 2006-10-12 | Ht-Idea S.R.L. | A device and method for measuring the thickness of a layer of a substance or material deposited on a section of road, and a monitoring system comprising said device |
| CN1844908A (en) * | 2006-03-20 | 2006-10-11 | 天津工业大学 | Ultrasonic wave detection method and detection apparatus therefor |
| CN101936871A (en) * | 2010-08-12 | 2011-01-05 | 中国水产科学研究院淡水渔业研究中心 | Method for detecting pollutant production coefficient of deposit in cultivation pond |
| CN105548141A (en) * | 2016-01-22 | 2016-05-04 | 中国科学院城市环境研究所 | Method for online monitoring of pollutants in water |
| CN207076183U (en) * | 2017-07-14 | 2018-03-09 | 上海翱途流体科技有限公司 | Dirt concentration sensor and ultrasonic wave automatic sewage discharging device in a kind of ultrasonic wave recirculated water |
| CN110054384A (en) * | 2019-05-24 | 2019-07-26 | 济南市莱芜雪野水库管理处 | A kind of water body purification structure for river sludge processing |
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| CN115327057A (en) | 2022-11-11 |
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