CN220500944U - Water quality monitoring buoy station - Google Patents
Water quality monitoring buoy station Download PDFInfo
- Publication number
- CN220500944U CN220500944U CN202321296729.9U CN202321296729U CN220500944U CN 220500944 U CN220500944 U CN 220500944U CN 202321296729 U CN202321296729 U CN 202321296729U CN 220500944 U CN220500944 U CN 220500944U
- Authority
- CN
- China
- Prior art keywords
- buoy
- water quality
- monitoring
- lifting assembly
- monitoring unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000012544 monitoring process Methods 0.000 title claims abstract description 101
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000035899 viability Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 hydrogen ions Chemical class 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The utility model discloses a water quality monitoring buoy station, and relates to the technical field of water quality detection. The method specifically comprises the following steps: the buoy assembly can float on the water surface; the monitoring unit is used for monitoring the water quality parameters; and the fixed part of the lifting assembly is connected with the buoy assembly, and the monitoring unit is connected with the telescopic part of the lifting assembly and can monitor water quality of different depths along with the telescopic movement of the telescopic part. The purpose is to realize that the water quality monitoring buoy station monitors the water quality of different depths.
Description
Technical Field
The utility model relates to the technical field of water quality detection, in particular to a water quality monitoring buoy station.
Background
With the development of economy and the increase of population, very serious environmental pollution problems are brought about, wherein river pollution is particularly prominent. Especially in cities and river sections where industry is concentrated, pollution is quite serious, industrial wastewater and domestic sewage are main pollution sources, and some of industrial emission substances are toxic and harmful, such as heavy metals, organic matters and the like, and the substances pose serious threats to human health and aquatic organisms. In order to realize the monitoring of water quality, a water quality monitoring buoy is usually arranged on the water surface, the general knowledge is that the components contained in the water body are numerous, layering phenomena among different components objectively exist, the sea, the lake, the reservoir and the water channel can be influenced by the terrain and the water flow, so that the non-uniformity of the distribution of the components of the water body is caused, but the existing buoy station can only realize the water quality monitoring under the fixed-point water depth, the monitoring of the water quality of different depths can not be realized, the monitoring precision of the monitoring buoy station is reduced, and therefore, the water quality monitoring buoy station monitors the water quality of different depths, and the technical problem to be solved is urgently.
Disclosure of Invention
The utility model mainly aims to provide a water quality monitoring buoy station, which aims to monitor water quality at different depths.
In order to achieve the above object, the present utility model provides a water quality monitoring buoy station, comprising:
the buoy assembly can float on the water surface;
the monitoring unit is used for monitoring the water quality parameters; and
the lifting assembly is characterized in that a fixing part of the lifting assembly is connected to the buoy assembly, and the monitoring unit is connected to a telescopic part of the lifting assembly and can monitor water quality of different depths along with telescopic movement of the telescopic part.
In an embodiment of the present application, the outside of the monitoring unit is covered with a protective cover, and a plurality of through holes for passing liquid are formed in the protective cover.
In an embodiment of the application, the protection casing is still equipped with the balancing weight, the balancing weight can be followed the length direction of protection casing is adjusted in order to change the focus position at water quality monitoring buoy station.
In one embodiment of the present application, the buoy assembly comprises:
the buoy body can float on the water surface; and
the electric unit is arranged at the top of the buoy body and is used for supplying power to the lifting assembly and the monitoring unit; wherein, the fixed part of lifting assembly is connected on the buoy body.
In an embodiment of the present application, the electrical unit comprises:
the battery pack is electrically connected with the monitoring unit and the lifting assembly; and
and the photovoltaic panel is connected with the battery pack and is used for supplying power to the battery pack.
In an embodiment of the present application, the electrical unit further comprises:
and the navigation mark lamp is electrically connected with the battery pack and used for prompting the position of the water quality monitoring buoy station.
In an embodiment of the present application, the electrical unit further comprises:
and the weather monitoring unit is electrically connected with the battery pack and used for collecting weather parameters.
In one embodiment of the present application, the lifting assembly includes:
the bracket is connected with the buoy body;
a winch connected to the bracket and rotatable relative to the bracket;
the driving motor is used for driving the winch to rotate; and
and one end of the rope is connected with the winch, and the other end of the rope is connected with the monitoring unit.
In an embodiment of the present application, the lifting assembly further comprises:
and the direction-regulating pulley is connected with the bracket and is used for enabling the central axis of the monitoring unit and the central axis of the buoy unit to coincide with each other.
By adopting the technical scheme, the floating buoy assembly is arranged to float on the surface of the water body, then the fixing part of the lifting assembly is connected to the floating buoy assembly, the fixing part of the lifting assembly can float on the surface of the water body, and the monitoring unit is connected to the telescopic part of the lifting assembly, so that the monitoring unit can move to different depths of the water body along with the telescopic part of the lifting assembly, and through monitoring of water quality of different depths of the water body, the vertical distribution condition of water quality of the water body is facilitated, and meanwhile, the change trend of the water quality of the water body can be mastered and evaluated. Simple structure and convenient implementation.
Drawings
The utility model will now be described in detail with reference to specific embodiments and accompanying drawings, in which:
FIG. 1 is a schematic perspective view of a first embodiment of the present utility model;
FIG. 2 is a schematic perspective view of the monitoring unit in FIG. 1;
FIG. 3 is a schematic perspective view of the lifting assembly of FIG. 1;
10. a buoy body; 20. a lifting assembly; 30. a monitoring unit; 40. an electrical unit; 50. navigation mark light; 60. a weather monitoring unit; 70. a photovoltaic panel; 31. a protective cover; 32. balancing weight; 21. a bracket; 22. a driving motor; 23. a winch; 24. a direction-regulating pulley.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are given by way of illustration only and are not intended to be limiting.
In order to achieve the above object, as shown in fig. 1 to 3, the present utility model provides a water quality monitoring buoy station, comprising:
the buoy assembly can float on the water surface;
a monitoring unit 30 for monitoring a water quality parameter; and
the lifting assembly 20, the fixed part of the lifting assembly 20 is connected to the buoy assembly, and the monitoring unit 30 is connected to the telescopic part of the lifting assembly 20, and can monitor water quality of different depths along with the telescopic movement of the telescopic part.
Specifically, the water quality monitoring buoy station comprises a buoy assembly, a monitoring unit 30 and a lifting assembly 20.
Wherein, the buoy assembly can float on the water surface, can conveniently fix a position the monitoring unit 30 through the buoy assembly that floats on the water surface, avoid monitoring unit 30 to lose. Meanwhile, the monitoring unit 30 can acquire water quality information near the water surface, so that the monitoring unit 30 is prevented from sinking, and the accuracy of parameter acquisition of the monitoring unit 30 is improved. The buoy assembly may be a buoy assembly commonly used in the prior art, and typically includes a power supply unit, a prompting member, etc., which are not described in detail herein because they are prior art.
The monitoring unit 30 employs a water quality detection sensor commonly used in the art, such as: pH sensor: the method is used for measuring the pH value of the water body, can monitor the concentration of hydrogen ions in the water body, and is used for evaluating the pollution degree of the water body, the health condition of an ecological system and the viability of aquatic organisms; dissolved oxygen sensor: the method is used for measuring the concentration of dissolved oxygen in the water body, and can evaluate the oxygen enrichment degree and eutrophication condition of the water body; temperature sensor: the method is used for measuring the temperature of the water body, can monitor the temperature change of the water body, and evaluates the viability of organisms in the water body and the stability of an ecological system; conductivity sensor: the method is used for measuring the conductivity of the water body, and can evaluate the content of dissolved matters in the water body and the salinity of the water; turbidity sensor: the method is used for measuring the concentration and the size of suspended particles in the water body, and can evaluate the transparency and the clarity of the water body; hardness sensor: the method is used for measuring the content of calcium and magnesium ions in the water body and evaluating the hardness of the water body and the quality of the water; etc.
The fixed part of the lifting assembly 20 is connected to the buoy assembly, the fixed part of the lifting assembly 20 is connected to the buoy assembly in a fixed connection mode, such as welding, integrated forming and the like, and the fixed part of the lifting assembly 20 is connected to the buoy assembly in a fixed connection mode, so that the connection strength between the fixed part of the lifting assembly 20 and the buoy assembly can be improved, and the stability of the lifting assembly 20 during working is improved. Of course, according to the design requirement, the fixing portion of the lifting assembly 20 and the buoy assembly can be detachably connected, such as screw connection, bolt connection, and the like, and the fixing portion of the lifting assembly 20 is conveniently installed and detached, so that later maintenance is facilitated. The monitoring unit 30 is connected to the telescopic part of the lifting assembly 20, and the monitoring unit 30 can move along with the telescopic movement of the lifting assembly 20 to different depths of the water body, so that the water quality of the different depths of the water body is monitored.
By adopting the technical scheme, the floating buoy assembly is arranged to float on the surface of the water body, then the fixing part of the lifting assembly 20 is connected to the floating buoy assembly, the fixing part of the lifting assembly 20 can float on the surface of the water body, and meanwhile, the monitoring unit 30 is connected to the telescopic part of the lifting assembly 20, so that the monitoring unit 30 can move along with the telescopic part of the lifting assembly 20, the monitoring unit 30 can move to different depths of the water body, and the vertical distribution condition of the water quality of the water body is facilitated through monitoring of different depths of the water body, and meanwhile, the change trend of the water quality of the water body can be mastered and evaluated. Simple structure and convenient implementation.
In an embodiment of the present application, the outer side of the monitoring unit 30 is covered with a protective cover 31, and a plurality of through holes for passing liquid are provided on the protective cover 31.
Specifically, the outside cladding of monitor cell 30 has protection casing 31, through set up protection casing 31 in monitor cell 30's the outside, can realize the protection to monitor cell 30, prolongs monitor cell 30's life, is provided with a plurality of through-holes that supply liquid to pass through on the protection casing 31, makes things convenient for liquid to get into inside and the monitor cell 30 contact of protection casing 31 through setting up the through-hole, realizes monitor cell 30 to the monitoring of quality of water, and a plurality of in this application refer to two or more.
In an embodiment of the present application, the protection cover 31 is further provided with a balancing weight 32, and the balancing weight 32 can be adjusted along the length direction of the protection cover 31 to change the gravity center position of the water quality monitoring buoy station.
Specifically, be provided with balancing weight 32 on the surface of protection casing 31, adopt swing joint's mode to connect between balancing weight 32 and the protection casing 31, adopt swing joint's mode to connect, can make balancing weight 32 along the length direction motion of protection casing 31 to change the focus position at whole water quality monitoring buoy station, improve the steady height at water quality monitoring buoy station, increase its moment of overturning, improve the stability at water quality monitoring buoy station during operation. Simple structure and convenient implementation.
In one embodiment of the present application, the buoy assembly comprises:
a buoy body 10 floatable on the water surface; and
an electric unit 40, provided on the top of the buoy body 10, for supplying power to the lifting assembly 20 and the monitoring unit 30; wherein, the fixed part of the lifting assembly 20 is connected to the buoy body 10.
Specifically, the buoy assembly includes: a buoy body 10 and an electrical unit 40. The buoy body 10 is a buoy body 10 commonly used in the prior art, and has a main effect of floating on the surface of a water body, and as the buoy body is the prior art, the buoy body 10 is not described in detail herein. The electrical unit 40 is connected to the top of the buoy body 10, and the electrical unit 40 is disposed on the top of the buoy unit, so that the electrical unit 40 is prevented from being in contact with water to cause short circuit. The electrical unit 40 is electrically connected with the lifting assembly 20 and the monitoring unit 30, provides electric energy for the lifting assembly 20 and the monitoring unit 30, and the electrical unit 40 can be a rechargeable battery pack or a wired power supply, and can enable the water quality monitoring buoy station to be separated from the limitation of wired connection by adopting the battery pack, so that the water quality monitoring buoy station is convenient to use. The water quality monitoring buoy station is connected by the wired power supply, so that the power supply of the water quality monitoring buoy station is more stable. By adopting the technical scheme, the device is simple in structure and convenient to implement.
In an embodiment of the present application, the electrical unit 40 includes:
a battery pack electrically connected to the monitoring unit 30 and the elevation assembly 20; and
a photovoltaic panel 70 is connected to the battery pack for powering the battery pack.
Specifically, the electrical unit 40 includes a battery pack and a photovoltaic panel 70, the battery pack is electrically connected to the monitoring unit 30 and the lifting assembly 20, and the battery pack supplies power to the monitoring unit 30 and the lifting assembly 20, so that the use of the water quality monitoring buoy station can be facilitated, and the use restriction of the wired connection to the water quality monitoring buoy station can be avoided. The photovoltaic panel 70 adopts the photovoltaic power generation panel commonly used in the prior art, and is used for supplying power to the battery pack through arranging the photovoltaic power generation panel, so that clean energy can be continuously provided for the battery pack, and the structure is simple and the implementation is convenient.
In an embodiment of the present application, the electrical unit 40 further includes:
the navigation mark light 50 is electrically connected with the battery pack and used for prompting the position of the water quality monitoring buoy station.
Specifically, the navigation mark lamp 50 is electrically connected with the battery pack, and through the indication of the navigation mark lamp 50, the ship can be conveniently avoided, and meanwhile, people can conveniently master the position of the water quality monitoring buoy station, and the device is simple in structure and convenient to implement.
In an embodiment of the present application, the electrical unit 40 further includes:
the weather monitoring unit 60 is electrically connected to the battery pack and is used for collecting weather parameters.
Specifically, the electrical unit 40 also includes a weather monitoring unit 60, because weather factors have a great influence on the water quality. Meteorological factors include air temperature, precipitation, wind speed, humidity, radiation and the like, and all the factors can influence the water quality indexes such as the temperature, oxygen content, nutrient content, water flow speed, water level and the like of the water body.
For example, elevated air temperatures can cause elevated water temperatures, thereby affecting biological growth and metabolism in the water, affecting the stability of the water ecosystem; precipitation can cause changes in water flow rate and water level, thereby affecting the dissolved oxygen content and nutrient concentration in the water; strong winds can cause water surface to fluctuate, thereby affecting the oxygen content in water and the mixing degree of water.
Therefore, in order to more accurately understand the water quality condition, it is necessary to monitor the change of the weather factor. The effect of weather factors on water quality may be better understood by the weather monitoring unit 60 collecting weather data to better predict and control changes in water quality. In addition, the weather monitoring unit 60 may also provide weather data to assist the water quality monitoring buoy station in predicting future weather conditions, providing a more comprehensive reference for water quality monitoring and management.
By adopting the technical scheme, the device is simple in structure and convenient to implement.
In one embodiment of the present application, the lifting assembly 20 includes:
a bracket 21 connected to the buoy body 10;
a winch 23 connected to the bracket 21 and rotatable with respect to the bracket 21;
a driving motor 22 for driving the winch 23 to rotate; and
a cable with one end connected to the winch 23 and the other end connected to the monitoring unit 30.
Specifically, the lifting assembly 20 includes a bracket 21, a winch 23, a drive motor 22, and a cable.
Wherein, the support 21 is connected on buoy body 10, winch 23 rotates the intermediate position of connecting at support 21, winch 23 can rotate relative to support 21, driving motor 22 connects on support 21 and is located one side of winch 23 for driving winch 23 to rotate, the one end of hawser is connected on winch 23, the other end of hawser is connected on detecting element, through the rotation of motor, can drive the shrink or the extension of hawser, thereby realize monitoring unit 30 can move to the different degree of depth of water, accomplish the quality of water monitoring to different degree of depth, and is simple in structure, the implementation of being convenient for.
In an embodiment of the present application, the lifting assembly 20 further includes:
and a steering pulley 24 connected to the bracket 21 for overlapping the central axis of the monitoring unit 30 and the central axis of the buoy unit.
Specifically, the lifting assembly 20 further includes a direction-adjusting pulley 24, where the direction-adjusting pulley 24 is connected to the top of the support 21, and is also rotatable relative to the support 21, and the number of the direction-adjusting pulleys 24 is at least one. Because lifting assembly 20 includes parts such as capstan winch 23, driving motor 22, when the hawser passes capstan winch 23, can't guarantee that the focus of hawser and the focus of buoy assembly are located same axis, in order to improve the stability at water quality monitoring buoy station, realize the regulation to the axis position when the hawser stretches out through setting up the steering assembly for the axis of buoy unit coincides mutually with the axis of detecting element, thereby improves the stability at water quality monitoring buoy station during operation, simple structure, the implementation of being convenient for.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (6)
1. A water quality monitoring buoy station, comprising:
the buoy assembly can float on the water surface;
the monitoring unit is used for monitoring the water quality parameters; and
the fixed part of the lifting assembly is connected with the buoy assembly, and the monitoring unit is connected with the telescopic part of the lifting assembly and can monitor water quality at different depths along with the telescopic movement of the telescopic part; the buoy assembly includes: the buoy body can float on the water surface; and
the electric unit is arranged at the top of the buoy body and is used for supplying power to the lifting assembly and the monitoring unit; wherein, the fixed part of the lifting assembly is connected to the buoy body; the lifting assembly includes:
the bracket is connected with the buoy body;
a winch connected to the bracket and rotatable relative to the bracket;
the driving motor is used for driving the winch to rotate; and
one end of the rope is connected with the winch, and the other end of the rope is connected with the monitoring unit; the lifting assembly further comprises: and the direction-regulating pulley is connected with the bracket and is used for enabling the central axis of the monitoring unit to coincide with the central axis of the buoy body.
2. The water quality monitoring buoy station of claim 1, wherein the outside of the monitoring unit is covered with a protective cover, and the protective cover is provided with a plurality of through holes for liquid to pass through.
3. The water quality monitoring buoy station of claim 2, wherein the shield is further provided with a weight that is adjustable along a length of the shield to change a center of gravity position of the water quality monitoring buoy station.
4. The water quality monitoring buoy station of claim 1, wherein the electrical unit comprises:
the battery pack is electrically connected with the monitoring unit and the lifting assembly; and
and the photovoltaic panel is connected with the battery pack and is used for supplying power to the battery pack.
5. The water quality monitoring buoy station of claim 4, wherein the electrical unit further comprises:
and the navigation mark lamp is electrically connected with the battery pack and used for prompting the position of the water quality monitoring buoy station.
6. The water quality monitoring buoy station of claim 4, wherein the electrical unit further comprises:
and the weather monitoring unit is electrically connected with the battery pack and used for collecting weather parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321296729.9U CN220500944U (en) | 2023-05-23 | 2023-05-23 | Water quality monitoring buoy station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321296729.9U CN220500944U (en) | 2023-05-23 | 2023-05-23 | Water quality monitoring buoy station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220500944U true CN220500944U (en) | 2024-02-20 |
Family
ID=89882960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321296729.9U Active CN220500944U (en) | 2023-05-23 | 2023-05-23 | Water quality monitoring buoy station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220500944U (en) |
-
2023
- 2023-05-23 CN CN202321296729.9U patent/CN220500944U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206594153U (en) | It is a kind of to utilize solar powered deep off-lying sea cultivation environment-friendly type ocean water quality sensor | |
| KR200438336Y1 (en) | Control Apparatus for Water Analysis | |
| CN212134174U (en) | Buoy type water quality detection device | |
| CN208780696U (en) | A kind of floatation type water quality of river risk monitoring and control and prior-warning device and system | |
| CN111912950A (en) | Water quality detection device and using method thereof | |
| CN213649845U (en) | Water quality monitoring of water environment floats device | |
| CN218412495U (en) | Sewage monitoring device for environmental management | |
| CN103922481A (en) | Floating type solar water purification device and method | |
| CN206420867U (en) | A kind of organism pollutant residual quantity monitor | |
| CN220500944U (en) | Water quality monitoring buoy station | |
| CN111547191A (en) | Stable form coastal waters floating observation device who conveniently retrieves | |
| CN210953799U (en) | Water body layered vertical section water quality monitoring system based on spectrometry | |
| CN212904845U (en) | Marine environment on-line monitoring device | |
| CN218892676U (en) | Aquatic product cultivation net cage game fishing sightseeing platform | |
| CN112362831A (en) | Amphibious formula environment detection device | |
| CN209198442U (en) | A kind of wind energy and solar integration device for the water surface | |
| CN110146670A (en) | A kind of floating type wireless internet of things monitoring device for water utilities prospecting | |
| CN216283789U (en) | Water level monitoring device for hydraulic engineering | |
| CN217901714U (en) | Real-time water quality testing device of sewage | |
| CN214041373U (en) | Water pollution synthesizes intelligent early warning device based on thing networking | |
| CN212932608U (en) | Water quality monitoring device | |
| CN212780771U (en) | Pollutant effluent water quality on-line monitoring equipment | |
| CN210163169U (en) | Water quality monitoring device with pond water quality improvement function | |
| CN102621285B (en) | Water quality parameter acquisition system with LED display device | |
| CN206038111U (en) | Anaerobic system granular sludge storage tank liquid level detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |