WO2021174449A1 - Water quality sampling device for environmental protection technology development - Google Patents
Water quality sampling device for environmental protection technology development Download PDFInfo
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- WO2021174449A1 WO2021174449A1 PCT/CN2020/077814 CN2020077814W WO2021174449A1 WO 2021174449 A1 WO2021174449 A1 WO 2021174449A1 CN 2020077814 W CN2020077814 W CN 2020077814W WO 2021174449 A1 WO2021174449 A1 WO 2021174449A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/12—Dippers; Dredgers
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- 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
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- 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
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- the utility model relates to the field, in particular to a water quality sampling device developed by environmental protection technology.
- Water quality sampling The water samples used to analyze the chemical composition of the natural water of the river are generally taken 0.2 to 0.5 meters below the water surface in the flow measurement section of the hydrological station. When the section is open, sampling points should be added. Samples can also be stratified at different depths at different times. The number of samples varies according to the water regime and is evenly distributed in different periods and different flows. The measurement times should be arranged during the high water period, normal water period and low water period. The flood runoff accounts for a large proportion of the annual runoff. Sampling during the flood period should be increased. Small peaks should be sampled from the top of the peak, and large peaks should be sampled with rising water, peak top, and falling water samples. When conducting field surveys of river water quality, sampling should be done at the mainstream location of the straight river. Otherwise, it should also be Try to stay away from the shore and sample at a place with a high flow rate.
- this utility model proposes a water quality sampling device developed by environmental protection technology.
- the hydraulic lifting rod can push the lifting seat to move downward and move
- the ultrasonic ranging sensor detects the depth of the detection board to determine the depth of the sampled water.
- the micro-pump sucks water into the sampling pipe.
- the water body enters the sampling pipe through the check valve and will not flow out.
- the sampling tube can work separately, so as to realize the sampling work of the water quality of different depths and different positions, and the work efficiency is high.
- the utility model provides a water quality sampling device developed by environmental protection technology. It includes a floating main board. The outer surface of the board is equipped with a drive box, the top surface of the floating main board is equipped with a control device, and the top of the control device is connected with a signal receiver through a transmission cable. Sampling tubes are evenly arranged at the bottom of the seat.
- hydraulic lifting rods are evenly arranged between the lifting seat and the bottom plate, and ultrasonic distance measuring sensors are evenly arranged on the outer side of the hydraulic lifting rods, and the ultrasonic distance measuring sensors are arranged on the top of the detection board.
- a connecting plate is provided on one side of the drive box, the connecting plate is welded to the mounting plate, a motor is provided inside the drive box, and a reducer is connected to the outside of the motor, and a screw rod is provided on the outside of the reducer, and the screw is connected to the reducer in transmission.
- the surface of the spiral rod is surrounded by water pushing blades, and the water pushing blades are arranged outside the driving box.
- control device is provided with a PLC controller, a data transmission module and a data storage module, and a remote control is provided at the output end of the signal receiver.
- elastic bands are fixed on the top surface of the top plate, and the elastic bands are arranged on both sides of the control device.
- the height of the mounting plate and the driving box are both lower than the height of the floating main board, and the number of the mounting plate and the driving box are both set to two.
- a micro water pump is provided on the top of the inner wall of the sampling tube, and a check valve is provided on the bottom surface of the sampling tube.
- the hydraulic lifting rod can push the lifting seat downward.
- the ultrasonic distance measuring sensor detects the depth of the detection plate to determine the depth of the sampled water and reaches the specified level. After the depth, the micro-pump sucks water into the sampling pipe, and the water body will not flow out after entering the sampling pipe through the check valve, and multiple sampling pipes can work separately, so as to realize the sampling work of water quality at different depths and different positions, and work efficiency high;
- the whole With the drive box, signal receiver and top plate, the whole can be lifted by pulling the elastic belt between the top plates, and then the whole is placed in the river, the floating main board floats on the water, the drive boxes on the front and rear sides
- the inner motor and reducer work, which can drive the spiral rod to rotate, thereby driving the floating main board to move in the water.
- Multiple driving boxes work separately to adjust the movement direction and speed of the floating main board, so as to reach the deep water level in the river. Moreover, it can be adjusted to perform multiple sampling tasks at different positions at one time, saving time.
- Figure 1 is a schematic structural diagram of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
- Figure 2 is a schematic diagram of the bottom plate structure of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
- Figure 3 is a schematic diagram of the drive box structure of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
- a water quality sampling device developed by environmental protection technology proposed by the present utility model includes a floating main board 1.
- a bottom plate 2 is fixed on the bottom surface of the floating main board 1, and a lifting seat 21 is provided at the bottom of the bottom plate 2, and a floating main board 1
- Mounting boards 3 are provided on the front and rear surfaces, the outer surface of the mounting board 3 is provided with a drive box 4, the top surface of the floating main board 1 is provided with a control device 5, and the top of the control device 5 is connected with a signal receiver 6 through a transmission cable ,
- Both sides of the control device 5 are provided with top plates 7, the two sides of the lifting seat 21 are provided with detection plates 8, and the bottom of the lifting seat 21 is evenly provided with sampling pipes 9.
- the whole body can be lifted by pulling the elastic belt 71 between the top plate 7, and then the whole body is placed in the river, the floating main board 1 floats on the water surface, and the motor 42 and the reducer 43 in the driving box 4 work.
- the screw rod 44 is driven to rotate, thereby driving the floating main board 1 to move in the water.
- the hydraulic lifting rod 22 can push the lifting seat 21 to move downward.
- the ultrasonic ranging sensor detects the depth of the detection plate 8 to determine the sampling water
- the micro water pump 91 works and sucks water into the sampling pipe 9, and the water body enters the sampling pipe 9 through the check valve 92 and will not flow out, thus realizing the sampling of water quality at different depths and positions.
- hydraulic lifting rods 22 are evenly arranged between the lifting seat 21 and the bottom plate 2, and ultrasonic distance measuring sensors 23 are evenly arranged on the outside of the hydraulic lifting rods 22, and the ultrasonic distance measuring sensors 23 are arranged on the top of the detection board 8. .
- the model of the ultrasonic distance measuring sensor 23 is set to PC-UB500, and the ultrasonic distance measuring sensor 23 detects the depth of the detection board 8 to determine the depth of the sampled water.
- a connecting plate 41 is provided on one side of the drive box 4, and the connecting plate 41 is welded to the mounting plate 3.
- a motor 42 is provided inside the drive box 4, and a reducer 43 is connected to the outside of the motor 42 for transmission.
- a screw rod 44 is provided on the outside of 43, and the screw rod 44 is in transmission connection with the reducer 43.
- the surface of the screw rod 44 is surrounded by a water pushing blade 45, and the water pushing blade 45 is arranged on the outside of the driving box 4.
- the motor 42 and the reducer 43 in the front and rear drive boxes 4 work, which can drive the screw rod 44 to rotate, thereby driving the floating main board 1 to move in the water, and multiple drive boxes 4 work separately to adjust the floating The movement direction and speed of the main board 1.
- control device 5 is provided with a PLC controller, a data transmission module and a data storage module, and the output end of the signal receiver 6 is provided with a remote control.
- the PLC controller model is set to s7-300, and the user operates the remote control on the river bank to send control instructions to sample. After the control device 5 receives the instructions, the PLC controller controls the electrical equipment to work.
- elastic bands 71 are fixed on the top surface of the top plate 7, and the elastic bands 71 are arranged on both sides of the control device 5.
- pulling the elastic belt 71 between the top plates 7 can lift the whole body, and then place the whole body in the river, and the floating main board 1 floats on the water surface.
- the height of the mounting plate 3 and the driving box 4 are both lower than the height of the floating main board 1, and the number of the mounting plate 3 and the driving box 4 are both set to two.
- multiple driving boxes 4 work separately to adjust the movement direction and speed of the floating main board 1.
- a micro water pump 91 is provided on the top of the inner wall of the sampling tube 9, and a check valve 92 is provided on the bottom surface of the sampling tube 9.
- the micro water pump 91 works to suck water into the sampling pipe 9, and the water body will not flow out after entering the sampling pipe 9 through the check valve 92.
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Abstract
Description
本实用新型涉及领域，尤其涉及一种环保技术开发的水质取样装置。The utility model relates to the field, in particular to a water quality sampling device developed by environmental protection technology.
水质取样供分析河流天然水化学成分的水样，一般在水文站测流断面中泓水面下0.2～0.5米采取，断面开阔时应当增加采样点，岸边采样点须设在水流通畅处，必要时还可在不同深度分层取样，采样次数根据水情变化，均匀分布于不同时期和不同流量，丰水期、平水期、枯水期均应布设测次，洪水径流量占年径流量比重很大的河流，应增加洪水期采样，小洪峰取峰顶水样，大洪峰取涨水、峰顶、落水水样，进行河流水质野外调查时，应在顺直河道主流位置取样，否则，也应尽量远离岸边，在流速较大地点采样。Water quality sampling The water samples used to analyze the chemical composition of the natural water of the river are generally taken 0.2 to 0.5 meters below the water surface in the flow measurement section of the hydrological station. When the section is open, sampling points should be added. Samples can also be stratified at different depths at different times. The number of samples varies according to the water regime and is evenly distributed in different periods and different flows. The measurement times should be arranged during the high water period, normal water period and low water period. The flood runoff accounts for a large proportion of the annual runoff. Sampling during the flood period should be increased. Small peaks should be sampled from the top of the peak, and large peaks should be sampled with rising water, peak top, and falling water samples. When conducting field surveys of river water quality, sampling should be done at the mainstream location of the straight river. Otherwise, it should also be Try to stay away from the shore and sample at a place with a high flow rate.
现有的水质取样装置大多都需要人工放置后进行取样，而人工放置后难免会遇到危险状况，而且取样的深度也无法精确，因此，发明一种环保技术开发的水质取样装置很有必要。Most of the existing water quality sampling devices need to be manually placed and then sampled, and it is inevitable that dangerous conditions will be encountered after manual placement, and the sampling depth cannot be accurate. Therefore, it is necessary to invent a water quality sampling device developed by environmental protection technology.
实用新型内容Utility model content
(一)实用新型目的(1) Purpose of utility model
为解决背景技术中存在的技术问题，本实用新型提出一种环保技术开发的水质取样装置，通过设有升降座、检测板和取样管，液压升降杆工作可以推动升降座向下移动，移动的过程中超声波测距传感器对检测板的深度进行检测从而判断取样水的深度，到达指定深度后微型水泵工作吸水进入取样管内部，水体由止回阀进入取样管内部后不会外流，且多个取样管能够分别工作，从而实现对不同深度和不同位置的水质进行采样工作，工作效率高。In order to solve the technical problems existing in the background technology, this utility model proposes a water quality sampling device developed by environmental protection technology. By providing a lifting seat, a detection plate and a sampling tube, the hydraulic lifting rod can push the lifting seat to move downward and move During the process, the ultrasonic ranging sensor detects the depth of the detection board to determine the depth of the sampled water. After reaching the specified depth, the micro-pump sucks water into the sampling pipe. The water body enters the sampling pipe through the check valve and will not flow out. The sampling tube can work separately, so as to realize the sampling work of the water quality of different depths and different positions, and the work efficiency is high.
(二)技术方案(2) Technical solution
本实用新型提供了一种环保技术开发的水质取样装置，包括漂浮主板，漂浮主板底部表面固定设有底板，底板底部设有升降座，漂浮主板前侧和后侧表面均设有安装板，安装板外侧表面设有驱动箱，漂浮主板顶部表面设有控制装置，控制装置顶部通过传输线缆连接有信号接收器，控制装置两侧均设有顶板，升降座两侧表面设有检测板，升降座底部均匀设有取样管。The utility model provides a water quality sampling device developed by environmental protection technology. It includes a floating main board. The outer surface of the board is equipped with a drive box, the top surface of the floating main board is equipped with a control device, and the top of the control device is connected with a signal receiver through a transmission cable. Sampling tubes are evenly arranged at the bottom of the seat.
优选的，升降座与底板之间均匀设有液压升降杆，液压升降杆外侧均匀设有超声波测距传感器，超声波测距传感器设置于检测板顶部。Preferably, hydraulic lifting rods are evenly arranged between the lifting seat and the bottom plate, and ultrasonic distance measuring sensors are evenly arranged on the outer side of the hydraulic lifting rods, and the ultrasonic distance measuring sensors are arranged on the top of the detection board.
优选的，驱动箱一侧设有连接板，连接板与安装板焊接，驱动箱内部设有电机，电机外侧传动连接有减速机，减速机外侧设有螺旋杆，螺旋杆与减速机传动连接，螺旋杆表面环绕设有推水叶片，推水叶片设置于驱动箱外侧。Preferably, a connecting plate is provided on one side of the drive box, the connecting plate is welded to the mounting plate, a motor is provided inside the drive box, and a reducer is connected to the outside of the motor, and a screw rod is provided on the outside of the reducer, and the screw is connected to the reducer in transmission. The surface of the spiral rod is surrounded by water pushing blades, and the water pushing blades are arranged outside the driving box.
优选的，控制装置内部设有PLC控制器、数据传输模块和数据存储模块，信号接收器输出端设有遥控器。Preferably, the control device is provided with a PLC controller, a data transmission module and a data storage module, and a remote control is provided at the output end of the signal receiver.
优选的，顶板顶部表面固定设有弹性带，弹性带设置于控制装置两侧。Preferably, elastic bands are fixed on the top surface of the top plate, and the elastic bands are arranged on both sides of the control device.
优选的，安装板和驱动箱高度均低于漂浮主板高度，安装板和驱动箱数量均设置为两个。Preferably, the height of the mounting plate and the driving box are both lower than the height of the floating main board, and the number of the mounting plate and the driving box are both set to two.
优选的，取样管内壁顶部设有微型水泵，取样管底部表面设有止回阀。Preferably, a micro water pump is provided on the top of the inner wall of the sampling tube, and a check valve is provided on the bottom surface of the sampling tube.
与现有技术相比，本实用新型的上述技术方案具有如下有益的技术效果：Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects:
1、通过设有升降座、检测板和取样管，液压升降杆工作可以推动升降座向下移动，移动的过程中超声波测距传感器对检测板的深度进行检测从而判断取样水的深度，到达指定深度后微型水泵工作吸水进入取样管内部，水体由止回阀进入取样管内部后不会外流，且多个取样管能够分别工作，从而实现对不同深度和不同位置的水质进行采样工作，工作效率高；1. With the lifting seat, detection plate and sampling tube, the hydraulic lifting rod can push the lifting seat downward. During the movement, the ultrasonic distance measuring sensor detects the depth of the detection plate to determine the depth of the sampled water and reaches the specified level. After the depth, the micro-pump sucks water into the sampling pipe, and the water body will not flow out after entering the sampling pipe through the check valve, and multiple sampling pipes can work separately, so as to realize the sampling work of water quality at different depths and different positions, and work efficiency high;
2、通过设有驱动箱、信号接收器和顶板，拉动顶板之间的弹性带可以将整体提起，随后将整体放置在河流中后，漂浮主板漂浮在水面上，前侧和后侧的驱动箱内的电机和减速机工作，可以带动螺旋杆转动，从而带动漂浮主板在水中移动，多个驱动箱分别工作可以调整漂浮主板的运动方向和速度，从而能够在河流中到达水位较深的位置，而且能够调整一次性进行不同位置的多次取样工作，节省时间。2. With the drive box, signal receiver and top plate, the whole can be lifted by pulling the elastic belt between the top plates, and then the whole is placed in the river, the floating main board floats on the water, the drive boxes on the front and rear sides The inner motor and reducer work, which can drive the spiral rod to rotate, thereby driving the floating main board to move in the water. Multiple driving boxes work separately to adjust the movement direction and speed of the floating main board, so as to reach the deep water level in the river. Moreover, it can be adjusted to perform multiple sampling tasks at different positions at one time, saving time.
图1为本实用新型提出的一种环保技术开发的水质取样装置的结构示意图。Figure 1 is a schematic structural diagram of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
图2为本实用新型提出的一种环保技术开发的水质取样装置的底板结构示意图。Figure 2 is a schematic diagram of the bottom plate structure of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
图3为本实用新型提出的一种环保技术开发的水质取样装置的驱动箱结构示意图。Figure 3 is a schematic diagram of the drive box structure of a water quality sampling device developed by an environmentally friendly technology proposed by the utility model.
附图标记：1、漂浮主板；2、底板；21、升降座；22、液压升降杆；23、超声波测距传感器；3、安装板；4、驱动箱；41、连接板；42、电机；43、减速机；44、螺旋杆；45、推水叶片；5、控制装置；6、信号接收器；7、顶板；71、弹性带；8、检测板；9、取样管；91、微型水泵；92、止回阀。Reference signs: 1. Floating main board; 2. bottom plate; 21, lifting seat; 22, hydraulic lifting rod; 23, ultrasonic distance measuring sensor; 3. mounting plate; 4. driving box; 41, connecting plate; 42, motor; 43. Reducer; 44. Screw rod; 45. Push blade; 5. Control device; 6. Signal receiver; 7. Top plate; 71. Elastic band; 8. Detection plate; 9. Sampling tube; 91. Mini water pump ; 92, check valve.
为使本实用新型的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本实用新型进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本实用新型的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本实用新型的概念。In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the present invention.
如图1-3所示，本实用新型提出的一种环保技术开发的水质取样装置，包括漂浮主板1，漂浮主板1底部表面固定设有底板2，底板2底部设有升降座21， 漂浮主板1前侧和后侧表面均设有安装板3，安装板3外侧表面设有驱动箱4，漂浮主板1顶部表面设有控制装置5，控制装置5顶部通过传输线缆连接有信号接收器6，控制装置5两侧均设有顶板7，升降座21两侧表面设有检测板8，升降座21底部均匀设有取样管9。As shown in Figures 1-3, a water quality sampling device developed by environmental protection technology proposed by the present utility model includes a floating
本实用新型中，拉动顶板7之间的弹性带71可以将整体提起，随后将整体放置在河流中后，漂浮主板1漂浮在水面上，驱动箱4内的电机42和减速机43工作，可以带动螺旋杆44转动，从而带动漂浮主板1在水中移动，液压升降杆22工作可以推动升降座21向下移动，移动的过程中超声波测距传感器对检测板8的深度进行检测从而判断取样水的深度，到达指定深度后微型水泵91工作吸水进入取样管9内部，水体由止回阀92进入取样管9内部后不会外流，从而实现对不同深度和不同位置的水质进行采样工作。In the utility model, the whole body can be lifted by pulling the
在一个可选的实施例中，升降座21与底板2之间均匀设有液压升降杆22，液压升降杆22外侧均匀设有超声波测距传感器23，超声波测距传感器23设置于检测板8顶部。In an optional embodiment,
需要说明的是，超声波测距传感器23型号设置为PC-UB500，超声波测距传感器23对检测板8的深度进行检测从而判断取样水的深度。It should be noted that the model of the ultrasonic
在一个可选的实施例中，驱动箱4一侧设有连接板41，连接板41与安装板3焊接，驱动箱4内部设有电机42，电机42外侧传动连接有减速机43，减速机43外侧设有螺旋杆44，螺旋杆44与减速机43传动连接，螺旋杆44表面环绕设有推水叶片45，推水叶片45设置于驱动箱4外侧。In an alternative embodiment, a connecting
需要说明的是，前侧和后侧的驱动箱4内的电机42和减速机43工作，可以带动螺旋杆44转动，从而带动漂浮主板1在水中移动，多个驱动箱4分别工作可以调整漂浮主板1的运动方向和速度。It should be noted that the
在一个可选的实施例中，控制装置5内部设有PLC控制器、数据传输模块和数据存储模块，信号接收器6输出端设有遥控器。In an optional embodiment, the
需要说明的是，PLC控制器型号设置为s7-300，使用者在河岸边操作遥控器发出控制指令进行取样，控制装置5接收到指令后由PLC控制器控制电器设备进行工作。It should be noted that the PLC controller model is set to s7-300, and the user operates the remote control on the river bank to send control instructions to sample. After the
在一个可选的实施例中，顶板7顶部表面固定设有弹性带71，弹性带71设置于控制装置5两侧。In an optional embodiment,
需要说明的是，拉动顶板7之间的弹性带71可以将整体提起，随后将整体放置在河流中后，漂浮主板1漂浮在水面上。It should be noted that pulling the
在一个可选的实施例中，安装板3和驱动箱4高度均低于漂浮主板1高度，安装板3和驱动箱4数量均设置为两个。In an optional embodiment, the height of the mounting
需要说明的是，多个驱动箱4分别工作可以调整漂浮主板1的运动方向和速度。It should be noted that multiple driving
在一个可选的实施例中，取样管9内壁顶部设有微型水泵91，取样管9底部表面设有止回阀92。In an optional embodiment, a
需要说明的是，到达指定深度后微型水泵91工作吸水进入取样管9内部，水体由止回阀92进入取样管9内部后不会外流。It should be noted that after reaching the specified depth, the
应当理解的是，本实用新型的上述具体实施方式仅仅用于示例性说明或解释本实用新型的原理，而不构成对本实用新型的限制。因此，在不偏离本实用新型的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本实用新型的保护范围之内。此外，本实用新型所附权利要求旨在涵盖落入所附权利要求范围和边界、或者这种范围和边界的等同形式内的全部变化和修改例。It should be understood that the above-mentioned specific embodiments of the present invention are only used to exemplify or explain the principles of the present invention, and do not constitute a limitation to the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the protection scope of the present utility model. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.
Claims (7)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE212020000015.8U DE212020000015U1 (en) | 2020-03-04 | 2020-03-04 | A water quality sampling device developed by environmental protection technology |
| PCT/CN2020/077814 WO2021174449A1 (en) | 2020-03-04 | 2020-03-04 | Water quality sampling device for environmental protection technology development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/077814 WO2021174449A1 (en) | 2020-03-04 | 2020-03-04 | Water quality sampling device for environmental protection technology development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021174449A1 true WO2021174449A1 (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2020/077814 Ceased WO2021174449A1 (en) | 2020-03-04 | 2020-03-04 | Water quality sampling device for environmental protection technology development |
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| Country | Link |
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| DE (1) | DE212020000015U1 (en) |
| WO (1) | WO2021174449A1 (en) |
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