CN114088465A - Automatic sampling device - Google Patents
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- CN114088465A CN114088465A CN202010761749.3A CN202010761749A CN114088465A CN 114088465 A CN114088465 A CN 114088465A CN 202010761749 A CN202010761749 A CN 202010761749A CN 114088465 A CN114088465 A CN 114088465A
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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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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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
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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Abstract
The invention discloses an automatic sampling device, which comprises a sampling container and an overflow channel communicated with the sampling container; the sampling container is provided with at least two areas with different average densities, so that after the sampling device is put into a sample liquid sampling point, part of overflowing channels are positioned below the liquid level, and pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the sample liquid enters the sampling container from part of overflowing channels under the action of the pressure difference. According to the automatic sampling device, after the sampling container is put into the liquid sampling point, liquid to be sampled is automatically collected into the sampling container from part of the overflow channels, and when the pressure difference between the inner cavity of the sampling container and the liquid level is zero or the overflow channels of the sampling container are completely changed to be above the liquid level due to posture change in the sampling process of the sampling container, sampling is automatically stopped, so that automatic sampling and automatic sampling stopping can be realized without manual sampling operation, the structure is simple, and the manufacturing cost is low.
Description
Technical Field
The invention relates to the technical field of environmental monitoring, in particular to an automatic sampling device.
Background
In recent years, along with the continuous development of social economy and urban scale expansion of China, more toxic and harmful substances are unscrupulously discharged into rivers, lakes and oceans, and the lives of people and the safety and self health of drinking water are seriously harmed. At present, the environmental supervision department basically adopts a manual sampling mode, and has the problems of limited sampling frequency, large investment of manpower and material resources, larger potential safety hazard, long sampling period and the like, and the water quality sample collection mode becomes a short board for restricting the environmental monitoring development and evaluation.
At present, the water quality sampling monitoring mainly adopts a manual sampling mode and a mode that a small part of automatic water quality samplers installed on the site carry out automatic sample retention. The manual sampling mode is suitable for the sampling requirement with low frequency (for example, once per month/week) or the requirement with high frequency and short sampling travel distance (for example, sampling in a factory), but the manual sampling mode has the disadvantages of difficulty in capturing sampling time, difficulty in controlling sampling quality, much personnel investment, potential safety hazard and the like. The automatic water quality sampler is suitable for the sampling requirement with high frequency, can realize that the equal time, equal amount, equal time proportion, equal flow proportion and external condition change to the critical point to trigger sampling, has a plurality of advantages compared with manual sampling, but also has the defect of higher requirement on field installation and use conditions, needs an external power supply, and has the defects of high cost, large investment, large volume, long construction period, inconvenient arrangement and the like.
Therefore, need for a sampling device urgently, need not external power and can realize automatic sampling, break away from the constraint of sampling power source, very big promotion flexibility, the variety of sampling mode, can reduce the input of sampling, effectively reduce its volume, improve sampling device's flexibility, can satisfy open-air or dangerous area's drainage basin sampling, stop the potential safety hazard in the sampling process, be applicable to the water sampling under the environment of various complicacies.
Disclosure of Invention
The invention provides an automatic sampling device, which aims to solve the technical problems that the existing environment monitoring needs manual sampling operation and is difficult to operate, power is not required to be provided, and the automatic sampling of sample liquid is realized by ingeniously utilizing the pressure difference formed by gravity on the liquid level through the structural design of the sampling device. The device is suitable for sampling water samples of various complex water area environments, and has extremely high flexibility and adaptability.
According to one aspect of the invention, an automatic sampling device is provided, which comprises a sampling container, an overflow channel communicated with the sampling container; the sampling container is provided with at least two areas with different average densities, so that after the sampling device is put into a sample liquid sampling point, part of overflowing channels are positioned below the liquid level, and pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the sample liquid enters the sampling container from part of overflowing channels under the action of the pressure difference.
Furthermore, the overflowing channel comprises a sampling channel and an exhaust channel, the sampling channel is located in the area with the largest average density of the sampling container, and the exhaust channel is located in the area with the smallest average density of the sampling container, so that after the sampling container is put into the sample liquid sampling point, part or all of the sampling channel is located below the liquid level.
Further, a plurality of regions with different average densities are formed by processing the manufacturing material and/or shape of the sampling container; or a plurality of areas with different average densities are formed by arranging a weight distribution structure in the sampling container and/or outside the sampling container; or a plurality of areas with different average densities are formed by arranging the air floating structure in the sampling container and/or outside the sampling container.
Further, the average density of the whole sampling container is not more than the density of the sample liquid to be collected.
Furthermore, the sampling container is provided with a control module for controlling sampling, a power module for supplying power to the control module, and a communication module for receiving and transmitting signals, wherein the control module is electrically connected with the communication module.
Furthermore, an exhaust valve connected with the control module is arranged on the exhaust channel.
Furthermore, a sample injection valve connected with the control module is arranged on the sample injection channel.
Further, the sampling container is internally provided with at least one of a pressure sensor, a positioning module, a temperature sensor, a conductivity sensor, a gyroscope sensor, a pH sensor, an ORP sensor, a dissolved oxygen sensor, a turbidity sensor, a sound pick-up and a video acquisition device which are connected with the control module.
Furthermore, the communication module is positioned in a region which is positioned above the liquid level or near the liquid level and can transmit signals after being sampled on the sampling container.
Further, the sampling container comprises a plurality of cells; the units are of split structures and are hermetically connected with each other; or a plurality of units are of an integral structure.
The invention has the following beneficial effects:
according to the automatic sampling device, the sampling container forms a plurality of areas with different average densities, after the sampling container is put into the liquid sampling point, pressure difference exists between the inner cavity of the sampling container and the liquid level, and part of the overflowing channel is positioned below the liquid level, so that liquid to be sampled is automatically collected into the sampling container from part of the overflowing channel.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the construction of an automatic sampling apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the automatic sampling apparatus according to the preferred embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention.
Illustration of the drawings:
1. a bottle body; 2. a bottle cap; 3. a sample introduction channel; 4. an exhaust passage; 5. a balancing weight; 6. a control module; 7. a power supply module; 8. a sample injection valve; 9. an exhaust valve; 10. a conductivity sensor; 11. a pressure sensor; 12. a temperature sensor; 13. a floating body; 14. an air-float chamber.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic diagram of the construction of an automatic sampling apparatus according to a preferred embodiment of the present invention; FIG. 2 is a schematic diagram of the automatic sampling apparatus according to the preferred embodiment of the present invention; FIG. 3 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention; FIG. 4 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention; FIG. 5 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention; fig. 6 is a schematic structural diagram of an automatic sampling apparatus according to another embodiment of the present invention.
As shown in fig. 1, the automatic sampling device of this embodiment includes a sampling container and an overflow channel communicated with the sampling container, the sampling container has at least two regions with different average densities, so that after the sampling device is put into a sample liquid sampling point, part of the overflow channel is located below the liquid level, and a pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the sample liquid can smoothly enter the sampling container from part of the overflow channel under the action of the pressure difference. Therefore, the sampling container is put on the sampling liquid level through the two areas with different densities of the sampling device, and liquid enters the inside of the sampling container through the contact part of the overflowing channel and the liquid level under the action of pressure difference, so that the automatic sampling of the sample is completed.
Taking surface water sampling as an example, after the sampling device provided by the invention is thrown to the water surface, as the sampling device is provided with at least two regions with different densities, and the overflowing channel is positioned in a region with an average density larger than the density of sample liquid to be collected, the region of the overflowing channel inevitably contacts the water surface firstly under the action of gravity and then empties part of water, at the moment, a height difference exists between an inner cavity of a sampling container communicated with the overflowing channel and the liquid level of a sampling point, so that pressure difference is generated, water can smoothly enter the sampling container under the action of the pressure difference, and the automatic sampling of the surface water is finished.
In a preferred embodiment of the present invention, as shown in fig. 1, the overflow channel includes a sample channel 3 and an exhaust channel 4, the sampling container has a plurality of regions with different average densities, the sample channel 3 is located in a region with an average density greater than that of the liquid to be sampled, after the sampling container is placed at the liquid sampling point, part and/or all of the regions of the sample channel 3 are located below the liquid level, and a pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the liquid to be collected is automatically collected from the sample channel 3 into the sampling container.
According to the automatic sampling device provided by the embodiment of the invention, the sampling container is formed into a plurality of areas with different average densities, the sampling channel 3 is arranged in the area with the largest average density of the sampling container, the exhaust channel 4 is arranged in the area with the smallest average density, so that after the sampling container is put into a liquid sampling point, part and/or all of the sampling channel 3 is positioned below the liquid level, and the pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the liquid to be collected is automatically collected from the sampling channel 3 into the sampling container, and when the pressure difference between the sampling container and the liquid to be sampled is zero, the sampling is automatically stopped, so that the automatic sampling and the automatic sampling stopping can be realized, the manual sampling operation is not needed, the structure is simple, and the manufacturing cost is low.
As shown in fig. 1 and fig. 2, in the present embodiment, the collection container has at least two regions with different average densities, and the sample introduction channel 3 is located in the region of the sampling container with the highest average density. After the sampling container is placed in a liquid sampling place, after the area near the sampling channel 3 contacts the liquid level, liquid to be collected is emptied, so that part or all of the sampling channel 3 is positioned below the liquid level, the exhaust channel 4 is communicated with the outside, at the moment, a height difference exists between the sampling container and the liquid level, and then a pressure difference is generated, so that the liquid to be collected is automatically collected into the sampling container from the sampling channel 3, gas in the sampling container is discharged to the outside from the exhaust channel 4, the weight of the sampling container is changed along with the gradual entering of a liquid sample into the sampling container, and the integral average density distribution of the sampling container is changed, so that the posture of the sampling container is also changed, and when the sampling channel 3 of the sampling container is changed to be above the liquid level, the sampling is automatically stopped. After sampling is finished, the exhaust passage 4 is not lower than the liquid level height in the sampling container. Further, the collection container has an overall average density that is no greater than the density of the sample liquid collected. The sampled sampling container therefore remains floating on the liquid surface.
According to the sampling quantity requirement of the liquid sample, the average density of different areas of the sampling container is designed so as to enable the automatic sampling quantity of the sampling container to meet the requirement. Such as: the average density of the area near the sample introduction channel 3 is designed to be not less than the density of the sample liquid to be measured, and the average density of the area near the exhaust channel 4 is not more than the density of the sample liquid to be measured. Or the average density of the area near the sampling channel 3 is less than the density of the sample liquid to be detected, but the structural design connected with the sampling channel is matched, so that after the sampling container is put on the sampling liquid level, the pressure difference exists between the inner cavity of the sampling container and the liquid level, and after the area near the sampling channel 3 contacts the liquid level, the liquid to be collected is partially emptied, so that the sampling channel 3 is partially or completely positioned below the liquid level, and the sample liquid can be ensured to smoothly enter the sampling container under the pressure difference. For example, the average density of the area of the sampling channel 3 is less than the density of the sample liquid to be detected, a structure or a component for providing pressure is connected outside the area, after the sample liquid is forcibly put into the sampling point, the area near the sampling channel 3 is contacted with the liquid level, partial emptying is also carried out on the liquid to be collected, and then the pressure difference exists between the inner cavity of the sampling container and the liquid level.
Therefore, there is no definite size definition between the average density of the area near the sample introduction channel 3 and/or the exhaust channel 4 and the density of the sample liquid to be collected, and in the specific implementation process, it can be realized by matching with a flexible structure, for example, the area where the average density of the sample introduction channel 3 is less than the density of the sample liquid to be collected is processed into a wedge shape or a cone shape, the sampling point is put in the sampling container, and after the balance is maintained, part or all of the sample introduction channel 3 is located below the liquid level.
The above description is only given by way of example of the preferred embodiments of the present invention, but it will be obvious to those skilled in the art that, based on the above disclosure, other similar structures can be designed based on the relationship between the density of the region of the sample introduction channel 3 and the sample liquid to be collected. For example, an auxiliary structure is externally connected to the sampling container to provide power to the sampling container, so that when the sampling container is in a balanced position, it is only required to ensure that part or all of the sampling channel 3 is located below the liquid level, which can be appropriately adjusted according to specific situations, and as to specific fixed position relationships or other structural shapes that achieve the same function, it should be easily understood by those skilled in the art, and therefore, no further description is provided herein.
The necessary explanations are made with respect to the average density of the sampling vessel: under the cavity state, the average density of the whole sampling container is the ratio of the mass of the sampling container to the volume of the sampling container; in the sampling state, the average density is the ratio of the sum of the mass of the sampling container and the sample liquid collected to the inside to the volume of the sampling container. Preferably, the average density of the sampling container as a whole is not greater than the density of the sample liquid to be collected. Therefore, the sampling container can float on the surface of the liquid to be sampled in the sampling process and after the sampling process of the whole sampling container is finished.
In addition, the exhaust passage 4 can be an air hole which can be ventilated with the outside and/or a pipeline communicated with the sampling container, and only the requirement of smoothly realizing the diversion of the air flow in the sampling container is met.
In addition, the sampling channel 3 can also be a pipeline communicated with the sampling container, so that the sampling liquid below the liquid level of the sample liquid to be measured can be conveniently collected, for example, the sample liquid with a fixed depth below the liquid level of the sample liquid to be collected can be realized.
Furthermore, the sampling container may be a plurality of chambers in conjunction, and/or a plurality of chambers independent of each other. Therefore, the sampling device can sample a plurality of sampling points by controlling the valve; or one controller implements sampling at the same sampling point, and/or at different time periods of multiple sampling points.
Optionally, the bulk average density of the collection container prior to sampling is less than the density of the liquid sample. After the sampling container is arranged at a liquid sampling place, the sampling channel 3 is positioned in the area with the maximum average density of the sampling container, the sampling channel 3 firstly sinks below the liquid level, so that a sample to be collected is collected into the sampling container from the sampling channel 3, and the gas in the sampling container is discharged to the outside from the exhaust channel 4. Optionally, the exhaust channel 4 also sinks below the liquid level. Optionally, the exhaust channel 4 does not sink below the liquid level. When the liquid level in the collection container is level with the liquid level of the liquid collection place, the sampling is automatically stopped. Along with the liquid sample gradually enters the sampling container, the density distribution of the whole sampling container is changed, so that the posture of the sampling container is also changed, and when the sampling channel 3 of the sampling container is changed to be higher than the liquid level, the sampling is automatically stopped. The overall average density of the sampling container after sampling is still less than that of the liquid sample, so the sampling container after sampling still floats on the liquid surface. The automatic sampling amount of the sampling container is equal to the liquid discharge volume of the sampling container, and the average density of different areas of the sampling container is designed according to the sampling amount requirement of the liquid sample, so that the automatic sampling amount of the sampling container meets the requirement.
Optionally, the bulk average density of the collection container prior to sampling is equal to the density of the liquid sample. After the sampling container is placed in a liquid sampling place, the sampling channel 3 is located in the area with the maximum average density of the sampling container, the sampling channel 3 sinks below the liquid level in sequence, a sample to be collected is collected into the sampling container from the sampling channel 3, gas in the sampling container is discharged to the outside from the exhaust channel 4, and after the sampling container is filled with a liquid sample bottle, the sampling is automatically stopped. The collection container is suspended below the liquid level after collection. Optionally, the average density of the collection container before sampling is greater than the density of the liquid sample, and the collection container sinks below the liquid level after collection. The automatic sampling amount of the sampling container is equal to the total volume of the sampling container, and the integral average density of the sampling container and the total volume of the sampling container are designed according to the sampling amount requirement of the liquid sample, so that the automatic sampling amount of the sampling container meets the requirement.
Alternatively, the plurality of regions of different average densities may be formed by material and/or shape processing of the sample container itself. Optionally, the regions of different average density are formed by providing a weight structure within and/or outside the sampling container. Alternatively, a plurality of regions of different average densities may be formed by providing an air-bearing structure within and/or outside the sampling container. In this embodiment, by additionally providing the weight block 5 in the sampling container, the sample introduction channel 3 is disposed near the weight block 5, so that the sample introduction channel 3 is located in the region of the sampling container where the average density is the greatest.
The sampling container comprises a plurality of units, and the sample introduction channel 3 and the exhaust channel 4 are arranged on one unit. Optionally, the plurality of units are of split structures and are hermetically connected with each other. Optionally, the plurality of cells are of unitary, one-piece, unitary construction.
As shown in fig. 1 and 2, in the present embodiment, the sampling container includes two units, i.e., a bottle body 1 and a bottle cap 2, and the sample introduction channel 3 and the air discharge channel 4 are disposed on the bottle cap 2. The region of inlet channel 3 is the biggest region of average density on the sampling container, the region at inlet channel 3 place is through throwing in the sampling container to the aquatic, inlet channel 3 is located below the surface of water, exhaust passage 4 is located more than the surface of water, thereby with water sample automatic acquisition to bottle 1 in, and gradually change the holistic density distribution of sampling container through the water sample in bottle 1 gradually and more, thereby make sampling container's gesture change, after inlet channel 3 changes to the surface of water more than, sampling container automatic stop advances a kind, thereby accomplish the automatic quantitative sampling of water sample. Optionally, a bottle opening is formed in the bottle body 1, and the bottle cap 2 is sealed and covered on the bottle opening.
Optionally, an anti-counterfeiting detection device for detecting whether the bottle cap 2 and the bottle mouth are opened or not is installed between the bottle cap 2 and the bottle mouth. Optionally, the anti-counterfeiting detection device comprises at least one of a piezoelectric sensor, an electromagnetic sensor, a contact switch, and a probe. When adopting piezoelectric sensor, piezoelectric sensor sets up between bottle lid 2 and bottle 1, and when twisting bottle lid 2, piezoelectric sensor can detect pressure and change and feed back to control module 6, and control module 6 can note and twist the incident or generate alarm information and transmit to remote management platform to remind the staff this time the water sample probably to be tampered with. And when adopting electromagnetic sensor, electromagnetic sensor sets up between bottle lid 2 and bottle 1, can arouse magnetic field when twisting bottle lid 2 and change, and electromagnetic sensor then can generate feedback electrical signal transmission to control module 6, and control module 6 can note and twist the incident or generate alarm information transmission to remote management platform. When a contact switch is adopted, one contact is arranged on the bottle cap 2, the other contact is arranged on the bottle body 1, when the bottle cap 2 is screwed down, the two contacts just contact, the circuit is conducted, when the bottle cap 2 is screwed down, the two contacts are staggered, the circuit is disconnected, the control module 6 can monitor that the circuit is in a disconnected state, the bottle cap 2 can be judged to be screwed down, and the control module 6 records the screwing event or generates alarm information to be transmitted to a remote management platform. When the probes are adopted, one probe is arranged on the bottle cap 2, the other probe is arranged on the bottle body 1, when the bottle cap 2 is screwed down, the two probes are just in contact, the circuit is conducted, when the bottle cap 2 is screwed down, the two probes are staggered, the circuit is disconnected, the control module 6 can monitor that the circuit is in a disconnected state, the bottle cap 2 can be judged to be screwed down, and the control module 6 records a screwing event or generates alarm information to be transmitted to a remote management platform. In addition, as an option, still be provided with antifalsification label on the sampling container, every sampling container corresponds only antifalsification label, gets back the laboratory with the water sample after, acquires label information through scanning antifalsification label to compare with the label information of prestoring in order to verify the authenticity of sampling container, in order to prevent to change whole sampling container in the transportation, further improved the antifalsification ability of water sample. The anti-counterfeiting label can be at least one of a two-dimensional code, a bar code and an RFID.
As shown in fig. 3, 4, 5 and 6, the sampling container is provided with a control module 6 for controlling sampling, a power module 7 for supplying power to the control module 6, and a communication module for receiving and transmitting signals, the communication module is located in an area capable of receiving and transmitting signals, and the control module 6 is electrically connected with the communication module. The communication module is positioned in an area which is positioned above the liquid level or near the liquid level and can transmit signals after being sampled on the sampling container. In this embodiment, after the sampling is completed, the communication module is located above the liquid level or not lower than 25 cm below the liquid level to transmit the sampling signal to the remote management platform. Optionally, the communication module includes a 3G/4G/5G module, an NB-IOT module, an eMTC module, a LoRa module, or a Sigfox module, so that the detection parameters can be remotely transmitted to the remote management platform in real time; or, the communication module is an NFC module, a bluetooth module, a Wi-fi module or a Zigbee module, and a worker can bring the management terminal to the field and establish wireless connection with the communication module, so as to wirelessly read the monitoring data stored in the control module 6. In addition, in other embodiments of the present invention, the communication module may be omitted, and after the sampling container is fished out from the water environment, the management terminal may be used to directly read the monitoring data in the control module 6 through the interface.
Optionally, an identification module is further installed on the sampling container. Optionally, the identification module is identified by a special text pattern, and/or a symbol. Optionally, the identification module identifies by illumination. Optionally, the identification module identifies by ring tone or voice broadcast.
Optionally, a sample valve 8 connected to the control module 6 is disposed on the sample channel 3. Whether the automatic sampling device starts sampling or not is judged through the control module 6, so that the sampling valve 8 is controlled to be opened, and then automatic sampling is started. Optionally, an exhaust valve 9 connected to the control module 6 is provided on the exhaust channel 4. After sampling is finished, the control module 6 controls the exhaust valve 9 to be closed so as to prevent external impurities from entering the sampling container from the exhaust channel 4. Optionally, the bleed valve and the sample valve 8 are solenoid valves. Optionally, the sample inlet of the sample inlet channel 3 is installed with a filtering device to filter out large particle impurities in the liquid sample.
As shown in fig. 3, 4, 5 and 6, at least one of a pressure sensor 11, a positioning module, a temperature sensor 12, a conductivity sensor 10, a gyroscope sensor, a pH sensor, an ORP sensor, a dissolved oxygen sensor, a turbidity sensor, a microphone and a video acquisition device connected to the control module 6 is further installed in the sampling container. The control module 6 is also used for controlling the sampling state according to the detection result of the pressure sensor 11 or the liquid level sensor so as to realize automatic quantitative sampling. The pressure detection result of the pressure sensor 11 and the liquid level detection result of the liquid level sensor can be correspondingly converted into a sampling volume, the sampling volume in the sampling container is monitored in real time by using the pressure sensor 11 or the liquid level sensor, the detection result is transmitted to the control module 6, and the control module 6 controls the sampling state according to the detection result, so that automatic quantitative sampling is realized.
Preferably, the sampling container is further provided with a positioning module electrically connected with the control module 6, and the control module 6 is further configured to obtain position information of the sampling container through the positioning module. Wherein, the positioning module can be any one of a GPS positioning module, a Beidou positioning module and a Galileo positioning module. The position of the sampling container is acquired in real time through the positioning module, the real-time position and the monitoring data can be stored in an associated mode or transmitted to the remote management platform together, the sampling authenticity is improved, the sampling container can be recovered conveniently, the water sample can be positioned and supervised in the whole process in the subsequent water sample transportation process, the water sample is prevented from being tampered in the transportation process, and the anti-counterfeiting performance of the water sample is further improved.
Preferably, the sampling container is further provided with a gyroscope sensor electrically connected with the control module 6 and used for detecting the posture of the sampling container, and the control module 6 is further used for recording a posture abnormal event or generating alarm information and transmitting the alarm information to the remote management platform when the gyroscope sensor detects that the current posture of the sampling container does not accord with the preset posture range. The control module 6 is preset with a preset posture range of the sampling container thrown into the water environment, the posture of the sampling container can be ensured to be smoothly sampled only in the preset posture range, the current posture of the sampling container is detected by the gyroscope sensor and the detection result is transmitted to the control module 6, once the control module 6 compares that the current posture of the sampling container does not conform to the preset posture range, meaning that the current posture of the sampling container is not satisfactory, and normal sample injection may not be possible, such as the sample injection channel 3 being located above the liquid level, the exhaust channel 4 is positioned below the liquid level, the control module 6 generates alarm information and transmits the alarm information to the remote management platform through the communication module, and the working personnel is reminded to manually adjust the posture of the sampling container, or the control module 6 records the gesture abnormal event and reminds the staff to overhaul the structure of the sampling container.
As shown in fig. 3 and 4, in the present embodiment, the sample introduction channel 3 and the exhaust channel 4 are disposed on the bottle cap 2, the control module 6, the power module 7 and other functional modules are all installed in the bottle cap 2, and the control module 6, the power module 7 and/or other functional modules are installed in a biased manner in a region where the sample introduction channel 3 is located, so that the region where the sample introduction channel 3 is located is a region where the average density on the sampling container is the largest, and the region where the exhaust channel 4 is located is a region where the average density on the sampling container is the smallest. After the sampling container was arranged in liquid sampling place, sampling channel 3 was located below the liquid level, exhaust passage 4 was located more than the liquid level, consequently there was pressure differential between sampling channel 3 and the exhaust passage 4, thereby make and wait to gather the automatic sampling of liquid from sampling channel 3 to bottle 1 in, the gas in the sampling container then is discharged to the external world from exhaust passage 4, along with liquid sample gets into the sampling container gradually, make the holistic density distribution of sampling container change, consequently, the gesture of sampling container also changes, when the sampling channel 3 changes to more than the liquid level on bottle lid 2, then the automatic shutdown sampling. Optionally, the exhaust valve 9 is controlled to be closed by the control module 6, so that the sampling container stops sampling. Optionally, the sampling valve 8 is controlled to be closed by the control module 6, so that the sampling container stops sampling.
As shown in fig. 5 and 6, optionally, a bottle cap 2 covers the top of the bottle body 1, an exhaust channel 4 is disposed on the bottle cap 2, and a sample inlet channel 3 is disposed at the bottom of the bottle body 1. The air exhaust channel 4 is positioned in the area with the minimum average density on the sampling container by additionally arranging the floating body 13 and/or the air flotation cabin 14 on the top of the bottle body 1 and/or in the bottle cap 2. After the sampling container was arranged in liquid sampling place, sampling channel 3 was located below the liquid level, exhaust passage 4 was located more than the liquid level, consequently there was pressure differential between sampling channel 3 and the exhaust passage 4, thereby make and wait to gather liquid automatic collection to bottle 1 from sampling channel 3 in, the gas in the sampling container then discharges to the external world from exhaust passage 4, along with liquid sample gets into the sampling container gradually, when the liquid level height in the bottle 1 and the liquid level height outside the bottle 1 were leveled at ordinary times, then the automatic shutdown sampling. Optionally, the exhaust valve 9 is controlled to be closed by the control module 6, so that the sampling container stops sampling. Optionally, the sampling valve 8 is controlled to be closed by the control module 6, so that the sampling container stops sampling.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic sampling device is characterized in that,
the device comprises a sampling container and an overflow channel communicated with the sampling container;
the sampling container is provided with at least two areas with different average densities, so that after the sampling device is put into a sample liquid sampling point, part of overflowing channels are positioned below the liquid level, and pressure difference exists between the inner cavity of the sampling container and the liquid level, so that the sample liquid enters the sampling container from part of overflowing channels under the action of the pressure difference.
2. The automatic sampling device of claim 1,
the overflowing channel comprises a sample feeding channel (3) and an exhaust channel (4),
the sampling channel (3) is positioned in the area with the maximum average density of the sampling container, the exhaust channel (4) is positioned in the area with the minimum average density of the sampling container, and after the sampling container is put into a sampling point of a sample liquid, part or all of the sampling channel (3) is positioned below the liquid level.
3. The automatic sampling device of claim 1 or 2,
forming a plurality of regions with different average densities by manufacturing materials and/or shape processing of the sampling container; or
Forming a plurality of regions of different average densities by providing a weight structure within and/or outside the sampling container; or
A plurality of areas with different average densities are formed by arranging an air floating structure in the sampling container and/or outside the sampling container.
4. The automatic sampling device of claim 2,
the average density of the whole sampling container is not more than the density of the sample liquid to be collected.
5. The automatic sampling device of claim 2,
the sampling container is provided with a control module (6) for controlling sampling and a power module (7) for supplying power to the control module (6) and a communication module for receiving and transmitting signals, and the control module (6) is electrically connected with the communication module.
6. The automatic sampling device of claim 5,
and an exhaust valve (9) connected with the control module (6) is arranged on the exhaust channel (4).
7. The automatic sampling device of claim 5,
and a sample injection valve (8) connected with the control module (6) is arranged on the sample injection channel (3).
8. The automatic sampling device of any one of claims 5 to 7,
and at least one of a pressure sensor (12), a positioning module, a temperature sensor (11), a conductivity sensor (10), a gyroscope sensor, a pH sensor, an ORP sensor, a dissolved oxygen sensor, a turbidity sensor, a sound pickup and a video acquisition device which are connected with the control module (6) is also arranged in the sampling container.
9. The automatic sampling device of any one of claims 5 to 7,
the communication module is positioned in an area which is positioned above the liquid level or near the liquid level and can transmit signals after being sampled on the sampling container.
10. The automatic sampling device of claim 1,
the sampling container comprises a plurality of cells; the units are of split structures and are hermetically connected with each other; or a plurality of units are of an integral structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761749.3A CN114088465A (en) | 2020-07-31 | 2020-07-31 | Automatic sampling device |
| PCT/CN2020/118395 WO2022021594A1 (en) | 2020-07-31 | 2020-09-28 | Automatic sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761749.3A CN114088465A (en) | 2020-07-31 | 2020-07-31 | Automatic sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN114088465A true CN114088465A (en) | 2022-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010761749.3A Pending CN114088465A (en) | 2020-07-31 | 2020-07-31 | Automatic sampling device |
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| Country | Link |
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| CN (1) | CN114088465A (en) |
| WO (1) | WO2022021594A1 (en) |
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| KR102052467B1 (en) * | 2017-11-29 | 2019-12-05 | 주식회사 라스테크 | Water sampler |
| CN208872548U (en) * | 2018-09-18 | 2019-05-17 | 上海市岩土地质研究院有限公司 | Inspection well water drawing device |
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| WO2016011385A1 (en) * | 2014-07-18 | 2016-01-21 | Exxonmobil Upstream Research Company | Method and system for performing surveying and sampling in a body of water |
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Also Published As
| Publication number | Publication date |
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| WO2022021594A1 (en) | 2022-02-03 |
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