CN113758906B - In-situ detection device for groundwater - Google Patents
In-situ detection device for groundwater Download PDFInfo
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- CN113758906B CN113758906B CN202111004009.6A CN202111004009A CN113758906B CN 113758906 B CN113758906 B CN 113758906B CN 202111004009 A CN202111004009 A CN 202111004009A CN 113758906 B CN113758906 B CN 113758906B
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- 238000001514 detection method Methods 0.000 title claims abstract description 82
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 48
- 239000003673 groundwater Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 21
- 238000005070 sampling Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1004—Cleaning sample transfer devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N35/1016—Control of the volume dispensed or introduced
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
- G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses an in-situ detection device for groundwater, which comprises an electric ball valve internally provided with an inflow channel, a ball valve, an outflow channel, a pump water inlet and a pump water outlet, and a pump arranged on the electric ball valve, wherein the pump is communicated with the pump water inlet and the pump water outlet; the light filtering module is arranged above the detection channel, the light source is arranged above the detection channel, and the light filtering module collecting port and the light source emitting port are matched with the detection channel; according to the invention, the opening and closing operation of the ball valve rotation is utilized to enable the channel structure to sample and analyze, and meanwhile, the pump power is utilized to enable the water flow to automatically flow to form a sample filtering process, so that the in-situ switching can be rapidly and conveniently carried out, the convenience and the efficiency of the whole work are greatly improved, and the device is suitable for in-situ detection of all underground water.
Description
Technical Field
The invention relates to the field of environment-friendly detection, in particular to an in-situ detection device for groundwater.
Background
The problem of water resources is the main problem faced by China and even the world in the twenty-first century. With the industrial and agricultural development and population growth, on one hand, the development and utilization of water resources are increased, and on the other hand, the pollution to the water resources is also increased. In order to reasonably develop and utilize groundwater resources, further worsening of the existing groundwater environment problem is suppressed, similar problems in a new groundwater development area are prevented, and on the basis of enhanced investigation, dynamic changes of groundwater are required to be monitored. At present, according to detection sites, in-situ detection and ex-situ detection are classified, the in-situ detection technology is difficult, and the in-situ detection technology is not successfully applied in China at present; the ectopic detection generally causes waste of time and stored medicament, and the detection result cannot be obtained in time.
If in-situ detection is adopted, the problem of how to switch samples in water flow needs to be solved, no convenient in-situ detection technical scheme exists in the prior art, so that the problem of how to switch samples and detection quickly is an important problem, and meanwhile, as the flow rate of groundwater and the like are not clear in many times, a foolproof treatment method or mode capable of coping with the problem needs to be found.
Disclosure of Invention
In view of this, there is a need to overcome at least one of the above-described problems or drawbacks of the prior art. The invention provides a groundwater in-situ detection device which comprises an electric ball valve, wherein the electric ball valve comprises an inflow channel, a water flowing channel is arranged in the inflow channel, the water flowing channel comprises a water inlet, the inflow channel further comprises a detection channel, and the inflow channel further comprises a pump water inlet; the ball valve comprises a ball body, a through hole for installing a filter membrane module is arranged in the ball body, the ball body is rotatably installed in the flow channel and positioned at the detection channel, and the through hole passes through different positions of the ball valve rotation, and forms an opening and closing structure with the detection channel and the flow channel; an outflow channel having a water outlet, the outflow channel further comprising a pump outlet;
the pump is arranged on the electric ball valve, and the pump is communicated with the water inlet of the pump and the water outlet of the pump;
the filter module is arranged above the detection channel, a collection port of the filter module is matched with the detection channel, and the filter module is connected with the outside through a signal wire;
And the light source is arranged above the detection channel, and the light source emitting port is matched with the detection channel.
The specific using steps are as follows:
S1, adjusting the water flow direction and the inflow channel direction: placing an in-situ detection device with an inflow channel into a sewer, and adjusting the in-situ detection device and the water flow direction to enable the water flow and the water flow channel to form an expected sampling effect;
S2, sampling: the direction of a through hole in a ball valve arranged in the inflow channel rotates to be consistent with the water flow direction, a pump water inlet and a pump water outlet are connected through a pump, water samples are extracted from the water inlet of the inflow channel by utilizing pump power, enter the outflow channel through the pump water outlet, are discharged into the surrounding environment through the water outlet of the outflow channel, and the water samples through a filtering module arranged in the through hole;
S3, analysis: when the sampling process is finished, the ball valve rotates, the filtering module in the channel rotates to a position matched with the detection through hole arranged in the inflow channel, the light source arranged on the in-situ detection device emits light to the sample collected on the filter membrane of the filtering module, and the formed excitation light is collected by the filtering module arranged on the in-situ detection device and transmitted to the analysis component for analysis.
Meanwhile, the device can also carry out reverse operation of cleaning the filter membrane:
the pump runs reversely, water flows into the outflow channel from the water outlet, flows into the inflow channel through the water outlet of the pump and the water inlet of the pump, flows out from the water inlet, and reversely cleans the filter membranes in the filter membrane module.
In the technical scheme, according to the background technology of the invention, the in-situ detection technology has great difficulty and is not successfully applied in China at present; according to the underground water in-situ detection device disclosed by the invention, the opening and closing operation of the rotation of the ball valve is utilized to enable the channel structure to perform sample sampling and sample analysis, when the underground water in-situ detection device is in the illustrated position, water flows in through the inflow channel, samples are collected through the ball valve filter membrane module, filtered water flows out of the inflow channel through the water inlet of the pump and flows into the outflow channel through the water outlet of the pump, the underground water in-situ detection device enters the external environment, after sample collection is finished, the ball valve rotates, the filter membrane module faces the light source and the analysis component to perform analysis operation, so that the in-situ position can be rapidly and conveniently switched, the convenience and efficiency of the whole operation are greatly improved, and the underground water in-situ detection device can be suitable for various types of underground water detection.
Further, a filter module is arranged at the water inlet.
Further, the through holes are through holes penetrating front and back, and the filter membrane modules are installed in the through holes.
Further, the filter membrane module is composed of a filter membrane, and the filter membrane is directly installed in the through hole.
Further, the filter membrane module installed in the through hole includes a filter membrane frame and a filter membrane installed on the filter membrane frame.
Further, the filter frame is coupled to the through hole by threads.
Still further, the filter frame is coupled to the through hole by a bayonet.
Further, the filter membrane module comprises a cylinder body and a filter membrane installed in the cylinder body, and the cylinder body is installed in the through hole.
Further, the inflow channel is a blind hole, and one end of the inflow channel is the water inlet;
Or (b)
The inflow channel is provided with openings at two ends, one end is provided with the water inlet, and the other end forms a sealing structure by using a sealing piece.
Further, the outflow channel is a blind hole, and one end of the outflow channel is the water outlet;
Or (b)
The outflow channel is provided with openings at two ends, one end is provided with the water outlet, and the other end forms a sealing structure by using a sealing piece.
Further, the underground water in-situ detection device further comprises a waterproof sealing piece, the waterproof sealing piece forms a full-closed waterproof structure for the whole detection device, or the waterproof sealing piece is a separation piece, a part needing to be waterproof in the device forms a local closed waterproof structure, and the signal wire penetrates out of the waterproof sealing piece.
Further, the filtering module is arranged on the in-situ detection device through a support and a chuck, the light source is arranged on the in-situ detection device through a support and a rotating chuck, and the light source is used for adjusting the position of the emitting port through the rotating chuck;
Or (b)
The filtering module is installed on the in-situ detection device through a support and a rotary chuck, the light source is installed on the in-situ detection device through a support and the rotary chuck, and the position of the emitting port is adjusted through the rotary chuck.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic cross-sectional illustration of an embodiment of the present invention;
FIG. 2 is a schematic view of the appearance of an embodiment of the present invention;
FIG. 3 is a schematic view of the appearance of a channel body according to an embodiment of the present invention;
FIG. 4 is a schematic view of the other side of the channel body of FIG. 3;
The spherical body A1, the through hole A2, the filter membrane module A3, the inflow channel B, the channel B1, the detection channel B2, the water inlet B3, the water outlet B4, the filter module B5, the rotary chuck C1, the support C2, the light source C3, the filter module D1, the chuck D2, the support D3, the pump E, the pump water inlet E1, the pump water outlet E2, the sealing member F and the waterproof sealing member G.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "bottom," "top," "front," "rear," "inner," "outer," "transverse," "vertical," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "connected," "coupled," "mated" and "mated" are to be construed broadly, and may be, for example, fixedly coupled, integrally coupled, or detachably coupled; may be a communication between the interiors of two elements; can be directly connected or indirectly connected through an intermediate medium; the "mating" may be a face-to-face or a point-to-face or line-to-face mating, and also includes a mating of the axes of the holes, as would be understood by one of ordinary skill in the art, in a particular sense by the terms described above.
The multi-robot scheduling method for inspection robots and fire suppression robot systems of the present invention will be described with reference to the accompanying drawings, in which fig. 1 is a schematic diagram of an embodiment of the present invention.
As shown in fig. 1-4, according to an embodiment of the present invention, an in-situ detection device for groundwater is provided: the electric ball valve comprises an inflow channel, wherein a water flow channel is arranged in the inflow channel, the water flow channel comprises a water inlet, the inflow channel further comprises a detection channel, and the inflow channel further comprises a pump water inlet; the ball valve comprises a ball body, a through hole for installing a filter membrane module is arranged in the ball body, the ball body is rotatably installed in the flow channel and positioned at the detection channel, and the through hole passes through different positions of the ball valve rotation, and forms an opening and closing structure with the detection channel and the flow channel; an outflow channel having a water outlet, the outflow channel further comprising a pump outlet;
the pump is arranged on the electric ball valve, and the pump is communicated with the water inlet of the pump and the water outlet of the pump;
the filter module is arranged above the detection channel, a collection port of the filter module is matched with the detection channel, and the filter module is connected with the outside through a signal wire;
And the light source is arranged above the detection channel, and the light source emitting port is matched with the detection channel.
According to some embodiments of the invention, a filter module is mounted at the water inlet.
According to some embodiments of the invention, the through holes are through holes penetrating front and back, and the filter membrane modules are installed in the through holes.
According to some embodiments of the invention, the filter membrane module consists of a filter membrane, which is mounted directly in the through-hole.
According to some embodiments of the invention, the filter membrane module mounted in the through-hole comprises a filter membrane frame and a filter membrane mounted on the filter membrane frame.
Further, the filter membrane frame is coupled with the through hole by threads.
Further, the filter membrane frame is coupled with the through hole through a bayonet.
According to some embodiments of the invention, the filter membrane module comprises a cylinder and a filter membrane mounted in the cylinder, the cylinder being mounted in the through hole.
According to some embodiments of the invention, the inflow channel is a blind hole, and one end is the water inlet;
Or (b)
The inflow channel is provided with openings at two ends, one end is provided with the water inlet, and the other end forms a sealing structure by using a sealing piece.
According to some embodiments of the invention, the outflow channel is a blind hole, and one end is the water outlet;
Or (b)
The outflow channel is provided with openings at two ends, one end is provided with the water outlet, and the other end forms a sealing structure by using a sealing piece.
According to some embodiments of the invention, the groundwater in-situ detecting device further comprises a waterproof sealing member, the waterproof sealing member forms a totally-enclosed waterproof structure for the whole detecting device, or the waterproof sealing member is a separating member, and the part to be waterproof in the device forms a partially-enclosed waterproof structure.
According to some embodiments of the invention, the filter module is mounted on the in-situ detection device by a support and a collet, the light source is mounted on the in-situ detection device by a support and a rotating collet, and the light source performs the emitter position adjustment by the rotating collet;
Or (b)
The filtering module is installed on the in-situ detection device through a support and a rotary chuck, the light source is installed on the in-situ detection device through a support and the rotary chuck, and the position of the emitting port is adjusted through the rotary chuck.
Any reference to "one embodiment," "an exemplary embodiment," etc., means that a particular element, structure, or feature described in connection with the embodiment is included in at least one embodiment of the invention. This schematic representation throughout this specification does not necessarily refer to the same embodiment. Moreover, when a particular element, structure, or feature is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such element, structure, or feature in connection with other ones of the embodiments.
While the detailed description of the invention has been made with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. In particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the claims without departing from the spirit of the invention. Except insofar as variations and modifications in the component parts and/or arrangements are described in the appended claims and the equivalents thereof.
Claims (8)
1. The utility model provides a groundwater normal position detection device which characterized in that includes
An electric ball valve comprising an inflow channel, a ball valve and an outflow channel; a water flow channel is arranged in the inflow channel, the water flow channel comprises a water inlet, the inflow channel further comprises a detection channel, and the inflow channel further comprises a pump water inlet; the ball valve comprises a ball-shaped main body, a through hole for installing a filter membrane module is arranged in the ball-shaped main body, the ball-shaped main body is rotatably installed in the water flowing channel and is positioned at the detection channel, and the through hole passes through different positions of the ball valve in a rotating way to form two structures of opening and closing together with the detection channel and the water flowing channel; the outflow channel is provided with a water outlet, and the outflow channel also comprises a water outlet of a pump;
the pump is arranged on the electric ball valve, and the pump is communicated with the water inlet of the pump and the water outlet of the pump;
the filter module is arranged above the detection channel, a collection port of the filter module is matched with the detection channel, and the filter module is connected with the outside through a signal wire;
The light source is arranged above the detection channel, and the emission port of the light source is matched with the detection channel;
The light filtering module is arranged on the in-situ detection device through a support and a chuck, the light source is arranged on the in-situ detection device through a support and a rotating chuck, and the light source is used for adjusting the position of the emitting port through the rotating chuck; or the light filtering module is arranged on the in-situ detection device through a support and a rotary chuck, the light source is arranged on the in-situ detection device through a support and a chuck, and the position of the collecting port is adjusted through the rotary chuck by the light filtering module;
The specific using steps are as follows:
S1, adjusting the water flow direction and the inflow channel direction: placing an in-situ detection device with an inflow channel into a sewer, and adjusting the in-situ detection device and the water flow direction to enable the water flow and the water flow channel to form an expected sampling effect;
S2, sampling: the method comprises the steps of rotating the direction of a through hole in a ball valve installed in an inflow channel to be consistent with the direction of water flow, connecting a pump water inlet and a pump water outlet through a pump, extracting water sample from the water inlet of the inflow channel by using pump power, enabling the water sample to enter an outflow channel through the pump water outlet, discharging the water sample to the surrounding environment through the water outlet of the outflow channel, and sampling the water flow through a filter membrane module arranged in the through hole;
S3, analysis: when the sampling process is finished, the ball valve rotates, the filter membrane module in the water flowing channel rotates to a position matched with the detection channel arranged in the inflow channel, a light source arranged on the in-situ detection device emits light to a sample collected on a filter membrane of the filter membrane module, and excitation light formed by the sample is collected by a filter module arranged on the in-situ detection device and transmitted to an analysis component for analysis;
Wherein the inflow channel is a blind hole, and one end of the inflow channel is the water inlet; or the inflow channel is provided with openings at two ends, one end is provided with the water inlet, and the other end forms a sealing structure by using a sealing piece; the outflow channel is a blind hole, and one end of the outflow channel is the water outlet; or the outflow channel is provided with openings at two ends, one end is provided with the water outlet, and the other end forms a sealing structure by using a sealing piece.
2. The groundwater in situ detection device according to claim 1, wherein a filter module is installed at the water inlet.
3. The groundwater in situ detection device according to claim 1, wherein the through holes are through holes penetrating from front to back, and the filter membrane module is installed in the through holes.
4. The groundwater in situ detection device according to claim 1, wherein the filter module is composed of a filter membrane directly mounted in the through hole.
5. The groundwater in situ detection device of claim 1, wherein the filter module mounted in the through hole comprises a filter frame and a filter mounted on the filter frame.
6. The groundwater in situ detection device of claim 5, wherein the filter frame is threadably coupled to the through hole;
Or (b)
The filter membrane frame is connected with the through hole through a bayonet.
7. The groundwater in situ detection device of claim 1, wherein the filter module comprises a cylinder and a filter mounted in the cylinder, the cylinder being mounted in the through hole.
8. The groundwater in situ detection device according to claim 1, further comprising a waterproof seal, wherein the waterproof seal forms a totally enclosed waterproof structure for the whole detection device, or wherein the waterproof seal is a separate piece, and forms a partially enclosed waterproof structure for components of the device that need to be waterproof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111004009.6A CN113758906B (en) | 2021-08-30 | 2021-08-30 | In-situ detection device for groundwater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111004009.6A CN113758906B (en) | 2021-08-30 | 2021-08-30 | In-situ detection device for groundwater |
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| Publication Number | Publication Date |
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| CN113758906A CN113758906A (en) | 2021-12-07 |
| CN113758906B true CN113758906B (en) | 2024-07-12 |
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| CN202111004009.6A Active CN113758906B (en) | 2021-08-30 | 2021-08-30 | In-situ detection device for groundwater |
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| CN107478617B (en) * | 2017-09-04 | 2023-10-31 | 中国计量大学 | Remote underground water multi-parameter on-line detection method and measurement device |
| CN208221665U (en) * | 2018-05-25 | 2018-12-11 | 南通博俊环保科技有限公司 | A kind of electric three passes ball valve |
| CN109085149A (en) * | 2018-10-24 | 2018-12-25 | 南京大学 | A kind of spectroscopic methodology water quality monitoring module and its application method based on LED light source |
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| CN109323915B (en) * | 2018-10-31 | 2022-03-18 | 中冶华天工程技术有限公司 | Refrigeration device for collecting microorganism samples in water, and device and method for collecting microorganism samples in water |
| CN110596200B (en) * | 2019-08-07 | 2022-08-05 | 中国地质调查局水文地质环境地质调查中心 | Underground water stratified sampling detection device and detection method |
| CN211527478U (en) * | 2020-03-04 | 2020-09-18 | 深圳市宇驰环境技术有限公司 | Five-parameter online monitoring device based on unmanned ship |
| DE202021000009U1 (en) * | 2021-01-04 | 2021-02-25 | Christian Blos | Ball valve with sieve |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2521452Y (en) * | 2001-11-06 | 2002-11-20 | 弗雷特利帕蒂纳罗里股份公司 | Ball valve with filter |
| CN107816563A (en) * | 2017-12-10 | 2018-03-20 | 泰兴市洁源环保工程有限公司 | A kind of multi-functional sewage conduct valve |
| CN113176236A (en) * | 2021-04-02 | 2021-07-27 | 深圳技术大学 | Large-scale visual membrane pollution in-situ online monitoring system suitable for membrane filtration |
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| CN113758906A (en) | 2021-12-07 |
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