CN214173866U - Sampling device - Google Patents

Abstract

The utility model discloses a sampling device, which comprises a sampling container and a sealing cover, wherein a flow passage communicated with the sampling container is processed on the sealing cover; the device also comprises a switching component which is fixed in the sealing cover and arranged along the path of the overflowing channel, and the switching component and the overflowing channel can be isolated or communicated; the sampling container is a compression structure with variable shape, and the internal volume and/or pressure of the compression structure can be set variably. The utility model discloses a sampling device, through compressing sampling container before the sampling, after sampling device reachs the sampling point, will overflow passageway and sampling container switch-on through the switching module, make the appearance liquid of outside send into sampling container through the passageway with appearance liquid under sampling container and external pressure differential effect in, pressure when in the sampling container increases to when being equal with external pressure, appearance liquid stops advancing the appearance, and will overflow passageway and sampling container through the switching module and cut off, thereby preserve the sealed appearance liquid of ration collection in sampling container.

Description

Sampling device

Technical Field

The utility model relates to an environmental monitoring technical field especially relates to a 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 source liquid sampling under the environment of various complicacies.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sampling device to solve current environmental monitoring's the artifical technical problem who carries out the sampling operation and operate the degree of difficulty big that needs, need not to provide power, through the structural design of sampling device self, ingenious utilization gravity realizes the autoinjection of appearance liquid at the pressure differential that the liquid level formed. 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 utility model, a sampling device is provided, which comprises a sampling container and a sealing cover connected with the sampling container, wherein a flow passage communicated with the sampling container is processed on the sealing cover; the device also comprises a switching component which is fixed in the sealing cover and arranged along the path of the overflowing channel, and the switching component and the overflowing channel can be isolated or communicated; the sampling container is a compression structure with variable shape, and the internal volume and/or pressure of the compression structure can be set variably.

Furthermore, the sampling container is of a compressible/extensible structure, pressure difference is formed between the inside and the outside of the sampling container by compressing the sampling container and closing the switching assembly, the switching assembly is opened during sampling, and sample liquid is automatically quantitatively and forcedly conveyed to the inner cavity of the sampling container from the overflowing channel by using the pressure difference between the inside and the outside of the sampling container.

Furthermore, the switching assembly comprises a rotary driving unit arranged in the sealing cover, a switching piece connected with the output end of the rotary driving unit, a power module connected with the input end of the rotary driving unit and a control module used for controlling the start and stop of the rotary driving unit, the switching piece is provided with an overflowing hole, the overflowing hole of the switching piece is opposite to the sample inlet of the overflowing channel by rotating the switching piece through the rotary driving unit so as to start sample injection, and the switching piece is blocked on the sample inlet of the overflowing channel by rotating the switching piece through the rotary driving unit so as to stop sample injection; or the rotating driving unit rotates the switching piece to enable the overflowing hole of the switching piece to be opposite to the sample outlet of the overflowing channel to start sample discharging, and the rotating driving unit rotates the switching piece to enable the switching piece to be blocked on the sample outlet of the overflowing channel to stop sample discharging.

Furthermore, the switching assembly comprises a lifting driving unit arranged in the sealing cover, a fixed plate arranged on the output end of the lifting driving unit, a piston arranged on the fixed plate, a power module connected with the input end of the lifting driving unit and a control module used for controlling the starting and stopping of the lifting driving unit, the fixed plate is driven to ascend by the lifting unit, the piston is separated from the sample inlet of the overflowing channel to start sample injection, the fixed plate is driven to descend by the lifting unit, and the piston is plugged into the sample inlet of the overflowing channel to stop sample injection; or the lifting unit drives the fixed plate to descend, so that the piston is separated from the sample outlet of the overflowing channel to start sample discharging, and the lifting unit drives the fixed plate to ascend, so that the piston is plugged into the sample outlet of the overflowing channel to stop sample discharging.

Furthermore, the sampling container and the sealing cover are of a split structure, and the sampling device further comprises an anti-counterfeiting detection mechanism arranged between the sampling container and the sealing cover.

Furthermore, the anti-counterfeiting detection mechanism comprises at least one telescopic movable part, a protruding part is arranged on the sampling container, and the movable part protruding sealing cover extends towards the sampling container and is in separable contact with the protruding part of the sampling container.

The anti-counterfeiting detection mechanism comprises a detection circuit arranged in the sealing cover and a light touch switch for controlling the on-off of the detection circuit, two ends of the movable part respectively abut against the light touch switch and the sampling container by utilizing the extrusion force between the sealing cover and the sampling container in a covering state, and the light touch switch is triggered to enable the detection circuit to form a closed loop and generate continuous signals, so that the sealing cover and the sampling container are judged to be in the covering state; the movable part is separated from the light touch switch, so that the detection circuit is disconnected, and whether the sealing cover is separated from the sampling container or not is judged.

Furthermore, the movable part comprises a pressure transmission shaft penetrating through the sealing cover and a spring sleeved on the pressure transmission shaft, the top end of the spring is abutted against the sealing cover, and the bottom end of the spring is abutted against the pressure transmission shaft.

Furthermore, the anti-counterfeiting detection mechanism comprises an induction circuit arranged in the sealing cover, a permanent magnet arranged on the sampling container and a magnetic induction switch which is arranged in the sealing cover and corresponds to the permanent magnet and is used for controlling the on-off of the induction circuit.

Furthermore, the sampling device also comprises a communication module which is connected with the anti-counterfeiting detection mechanism and is used for transmitting detection information.

The utility model discloses following beneficial effect has:

the utility model discloses a sampling device, the sampling container is connected with sealed lid, and set up the overflow channel that is linked together with the sampling container on sealed lid, switching components has still been arranged in the sealed lid, and through setting up the sampling container into the changeable compression structure of shape, its internal volume and/or the setting that pressure can change, therefore, through compressing the sampling container before the sampling, make the pressure in the sampling container diminish, and cut off overflow channel and sampling container through switching components, make appearance liquid or other gas, impurity all can't get into in the sampling container through the circulation channel, after sampling device reachs the sampling point, through switching components with the switching-on of overflow channel and sampling container, make appearance liquid outside send into the sampling container through the circulation channel under the pressure difference effect between sampling container and ambient pressure, when the pressure in the sampling container increases to be equal with ambient pressure, and stopping sample injection of the sample liquid, and isolating the overflowing channel from the sampling container through the switching assembly, so that the sample liquid which is quantitatively collected is hermetically stored in the sampling container. Through the switching module who arranges along overflowing the passageway, conquered from the counterfeit of a kind channel to the appearance liquid, guaranteed that the sampling is accomplished the back, the appearance liquid of sampling container can not influenced by external factor, for example: replacement, dilution and the like, and the authenticity of the sample liquid is ensured from the source, so that the validity of water quality monitoring data is ensured.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is an overall schematic view of a sampling device according to a preferred embodiment of the present invention;

FIG. 2 is a sample introduction state diagram of the sampling device according to the preferred embodiment of the present invention;

fig. 3 is a sealing state diagram of the sampling device according to the preferred embodiment of the present invention;

fig. 4 is a schematic structural view of a sampling device according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a switching assembly of a sampling device according to another embodiment of the present invention;

fig. 6 is a schematic structural diagram of a switching assembly of a sampling device according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an anti-counterfeit detection mechanism according to a preferred embodiment of the present invention;

fig. 8 is a schematic structural diagram of an anti-counterfeit detection mechanism according to another embodiment of the present invention;

fig. 9 is a schematic structural view of an anti-counterfeit detection mechanism according to another embodiment of the present invention;

fig. 10 is a schematic structural view of an anti-counterfeit detection mechanism according to another embodiment of the present invention;

fig. 11 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention;

fig. 12 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention;

fig. 13 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention;

fig. 14 is a schematic structural view of the tamper-evident mechanism of the preferred embodiment of the present invention;

fig. 15 is a schematic structural diagram of a sampling device according to another embodiment of the present invention;

fig. 16 is a schematic structural diagram of a sampling device according to another embodiment of the present invention;

fig. 17 is an overall schematic view of a sampling device according to another embodiment of the present invention;

fig. 18 is a schematic structural diagram of a use state of a sampling device according to another embodiment of the present invention;

fig. 19 is a schematic structural diagram of a sampling device according to another embodiment of the present invention;

fig. 20 is a schematic structural diagram of a switching component of a sampling device according to another embodiment of the present invention.

Illustration of the drawings:

1. a sampling container; 2. a sealing cover; 3. a top cover; 4. a first channel; 5. a second channel; 6. a lifting drive unit; 7. a fixing plate; 8. a piston; 9. a power supply module; 10. a rotation driving unit; 11. a switching sheet; 12. a cover plate; 13. a control panel; 14. a pressure transmission shaft; 15. a spring; 16. a tact switch; 17. a trigger ball; 18. a balancing weight; 19. a pressure measuring module; 20. a pressure measurement cavity; 21. a protrusion; 22. a limiting block; 23. a limiting groove; 24. an overflow channel; 25. an anti-counterfeiting magnetic stripe; 26. a ferromagnetic pillar; 27. a sensing circuit; 28. a magnetic induction switch; 29. a lift locking unit; 30. a pin rod; 31. a pin hole; 32. a limiting disc.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Fig. 1 is an overall schematic view of a sampling device according to a preferred embodiment of the present invention; FIG. 2 is a sample introduction state diagram of the sampling device according to the preferred embodiment of the present invention; fig. 3 is a sealing state diagram of the sampling device according to the preferred embodiment of the present invention; fig. 4 is a schematic structural view of a sampling device according to another embodiment of the present invention; fig. 5 is a schematic structural diagram of a switching assembly of a sampling device according to another embodiment of the present invention; fig. 6 is a schematic structural diagram of a switching assembly of a sampling device according to another embodiment of the present invention; FIG. 7 is a schematic structural diagram of an anti-counterfeit detection mechanism according to a preferred embodiment of the present invention; fig. 8 is a schematic structural diagram of an anti-counterfeit detection mechanism according to another embodiment of the present invention; fig. 9 is a schematic structural view of an anti-counterfeit detection mechanism according to another embodiment of the present invention; fig. 10 is a schematic structural view of an anti-counterfeit detection mechanism according to another embodiment of the present invention; fig. 11 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention; fig. 12 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention; fig. 13 is a schematic structural view of the detachment prevention mechanism of the preferred embodiment of the present invention; fig. 14 is a schematic structural view of the tamper-evident mechanism of the preferred embodiment of the present invention; fig. 15 is a schematic structural diagram of a sampling device according to another embodiment of the present invention; fig. 16 is a schematic structural diagram of a sampling device according to another embodiment of the present invention; fig. 17 is an overall schematic view of a sampling device according to another embodiment of the present invention; fig. 18 is a schematic structural diagram of a use state of a sampling device according to another embodiment of the present invention; fig. 19 is a schematic structural diagram of a sampling device according to another embodiment of the present invention; fig. 20 is a schematic structural diagram of a switching component of a sampling device according to another embodiment of the present invention.

As shown in fig. 1-3, the sampling device of the present embodiment includes a sampling container 1 and a sealing cover 2 connected to the sampling container 1, wherein a flow passage 24 communicated with the sampling container 1 is formed on the sealing cover 2; the device also comprises a switching component which is fixed in the sealing cover 2 and arranged along the path of the overflowing channel 24, and the switching component and the overflowing channel 24 can be isolated or communicated; the sampling container 1 is a shape-variable compression structure, the internal volume and/or pressure of which can be variably set. The utility model discloses a sampling device, sampling container 1 is connected with sealed lid 2, and set up the overflow passageway 24 that is linked together with sampling container 1 on sealed lid 2, still arrange the switching component in sealed lid 2, and through setting up sampling container 1 into the changeable compression structure of shape, its internal volume and/or the setting that pressure can change, therefore, through compressing sampling container 1 before the sampling, make the pressure in sampling container 1 diminish, and separate overflow passageway 24 and sampling container 1 through the switching component, make sample liquid or other gas, impurity all can't get into in sampling container 1 through flow channel 24, after sampling device reachd the sampling point, through switching component with overflow passageway 24 and sampling container 1 switch-on, make outside sample liquid send sample liquid into sampling container 1 through flow channel 24 under the pressure differential effect between sampling container 1 and the external pressure, when the pressure in the sampling container 1 is increased to be equal to the external pressure, the sample liquid stops sampling, and the overflowing channel 24 is separated from the sampling container 1 through the switching assembly, so that the quantitatively collected sample liquid is sealed and stored in the sampling container 1. Through the switching module who arranges along overflowing channel 24, conquered the fake of advancing the kind channel to the appearance liquid from advancing, guaranteed that the sampling is accomplished the back, the appearance liquid of sampling container 1 can not influenced by external factor, for example: replacement, dilution and the like, and the authenticity of the sample liquid is ensured from the source, so that the validity of water quality monitoring data is ensured.

In the preferred embodiment of the present invention, the sampling container 1 is a compressible/expandable structure, for example, the sampling container 1 is a bellows-shaped compressible structure, and the sampling container 1 is compressed to change the volume and/or pressure inside the sampling container 1, so that a pressure difference is formed inside and outside the cavity of the sampling container 1, and then the sample liquid is automatically and quantitatively pressure-fed to the inner cavity of the sampling container 1 from the overflow channel 24 by using the pressure difference inside and outside the inner cavity of the sampling container 1.

In the present embodiment, a cover plate 12 is provided in the sealing cap 2 to cover the container mouth of the sampling container 1. The cover plate 12 is provided with a flow port communicating with the flow passage 24. The switching assembly is mounted above the cover plate 12. The switching component comprises a lifting driving unit 6 installed in the sealing cover 2, a piston 8 installed on the output end of the lifting driving unit 6, a power module 9 connected with the input end of the lifting driving unit 6 and a control module used for controlling the starting and stopping of the lifting driving unit 6, the lifting driving unit drives the fixing plate 7 to ascend, the piston 8 is separated from the sample inlet of the overflowing channel 24 and is switched to a sample inlet state to start sample injection, the lifting driving unit drives the fixing plate 7 to descend, and the piston 8 is plugged into the sample inlet of the overflowing channel 24 and is switched to a sealing state to stop sample injection. Optionally, the lifting driving unit drives the fixing plate 7 to descend, so that the piston 8 is separated from the sample outlet of the overflowing channel 24 and is switched to a sample inlet state to start sample inlet, and the lifting driving unit 6 drives the fixing plate 7 to ascend, so that the piston 8 is plugged into the sample outlet of the overflowing channel 24 and is switched to a sealing state to stop sample inlet.

In another embodiment, as shown in fig. 4-6, the switching assembly includes a rotary driving unit 10 inside the sealing cover 2, a switching piece 11 connected to an output end of the rotary driving unit 10, a power module 9 connected to an input end of the rotary driving unit 10, and a control module for controlling the start and stop of the rotary driving unit 10. The switching piece 11 is provided with an overflowing hole. The rotary driving unit 10 rotates the switching piece 11, so that the overflowing hole on the switching piece 11 is opposite to the sample outlet of the overflowing channel 24 to switch to a sample inlet state for starting sample inlet, and the rotary driving unit 10 rotates the switching piece 11, so that the switching piece 11 is blocked on the sample outlet of the overflowing channel 24 to switch to a sealed state for stopping sample inlet. Alternatively, the rotation driving unit 10 rotates the switching piece 11, so that the overflowing hole on the switching piece 11 is opposite to the sample inlet of the overflowing channel 24 to switch to the sample inlet state to start sample injection, and the rotation driving unit 10 rotates the switching piece 11, so that the switching piece 11 is blocked on the sample inlet of the overflowing channel 24 to switch to the sealed state to stop sample injection. In the present embodiment, the switching piece 11 is provided with an overflow hole. The switching piece 11 is rotated by the rotation driving unit 10, so that the overflowing hole, the sample outlet of the overflowing channel 24 and the flow outlet of the cover plate 12 are communicated and switched to a sample introduction state to start sample introduction, the switching piece 11 is rotated by the rotation driving unit 10, so that the overflowing hole and the sample outlet of the overflowing channel 24 are staggered, the switching piece 11 is blocked between the sample outlet of the overflowing channel 24 and the flow outlet of the cover plate 12, and the switching piece is switched to a sealing state to stop sample introduction.

In this embodiment, the switching assembly further comprises a pressure measuring module 19 connected to the power module 9 and the control module for measuring the sample liquid pressure. The sealing cover 2 is provided with a pressure measuring cavity 20 communicated with the outside. Pressure measuring module 19 installs in sealed lid 2, and pressure measuring module 19's measuring end stretches into pressure measuring chamber 20 in, measures the appearance liquid pressure in pressure measuring chamber 20 through pressure measuring module 19 to with pressure measuring signal transmission to control module, control module judges whether the degree of depth that sampling device arrived required sampling according to pressure measuring signal, and then control and advance a kind.

Alternatively, the sampling container 1 and the sealing cap 2 are of an integrally formed structure.

In the present embodiment, the sampling vessel 1 and the sealing cap 2 are separate structures. The sampling device further comprises an anti-counterfeiting detection mechanism arranged between the sampling container 1 and the sealing cover 2. Through the anti-fake detection mechanism who sets up between sealed lid 2 and sampling container 1, can automatic identification sampling container 1 and sealed lid 2 whether separate after the appearance has been taken. In this embodiment, a communication module connected to the anti-counterfeit detection mechanism and used for transmitting detection information is installed in the sealing cover 2. The communication module transmits the information of the disconnection of the detection circuit to the remote management platform, so that whether the sealing cover 2 is opened or not is known. Optionally, the anti-counterfeiting detection device further comprises a display module connected with the anti-counterfeiting detection mechanism and used for displaying detection information. Whether the sealing cover 2 is opened or not is known according to the display of the display module. Optionally, the anti-counterfeiting detection device further comprises a sound module connected with the anti-counterfeiting detection mechanism and used for identifying detection information. Whether the sealing cover 2 is opened or not is known according to the voice or the ring of the sound module.

Optionally, the anti-counterfeiting detection mechanism comprises at least one of a piezoelectric sensor, an electromagnetic sensor and a probe. When adopting piezoelectric sensor, piezoelectric sensor sets up between sealed lid 2 and sampling container 1, and when twisting sealed lid 2, piezoelectric sensor can detect pressure and change and feed back to communication module, and communication module can note and twist the incident or generate alarm information transmission to remote management platform to remind the staff this time source liquid probably to be tampered with. And when adopting electromagnetic sensor, electromagnetic sensor sets up between sealed lid 2 and sampling container 1, can arouse magnetic field when twisting sealed lid 2 and change, and electromagnetic sensor then can generate feedback electrical signal transmission to communication module, and communication module can note and twist the incident or generate alarm information transmission to remote management platform. When the probes are adopted, one probe is arranged on the sealing cover 2, the other probe is arranged on the sampling container 1, when the sealing cover 2 is screwed down, the two probes just contact, the circuit is conducted, when the sealing cover 2 is screwed down, the two probes are staggered, the circuit is disconnected, the communication module can monitor that the circuit is in a disconnected state, the sealing cover 2 can be judged to be screwed down, and the communication module records the screwing event or generates alarm information to be transmitted to a remote management platform. In addition, as an option, the sampling container 1 is further provided with an anti-counterfeit label, each sampling container 1 corresponds to a unique anti-counterfeit label, after the source liquid is taken back to the laboratory, label information is obtained by scanning the anti-counterfeit labels, and the label information is compared with pre-stored label information to verify the authenticity of the sampling container 1, so that the whole sampling container 1 is prevented from being exchanged in the transportation process, and the anti-counterfeit performance of the source liquid is further improved. The anti-counterfeiting label can be at least one of a two-dimensional code, a bar code and an RFID.

In another embodiment, the anti-counterfeiting detection mechanism comprises at least one telescopic movable part which is arranged to protrude from the contact surface of the sealing cover 2 and the sampling container 1 and extend towards the sampling container 1. One side of the container mouth of the sampling container 1 is provided with a protruding part 21, and the protruding part 21 is positioned below the movable part to contact with the movable part. The anti-counterfeiting detection mechanism comprises a detection circuit arranged in the sealing cover 2 and a light touch switch 16 used for controlling the on-off of the detection circuit, the two ends of the movable part are respectively abutted against the light touch switch 16 and the sampling container 1 by utilizing the extrusion force between the sealing cover 2 and the sampling container 1 in a covering state, the light touch switch 16 is triggered, the detection circuit forms a closed loop and generates continuous signals, and therefore whether the sealing cover 2 is separated from the sampling container 1 or not is judged, whether the sealing cover 2 is separated from the container after sampling is completed or not is judged, and the undistorted sample liquid in the container is ensured. When the sealing cover 2 and the sampling container 1 are in a covering state, the movable part is pressed to be upwards compressed and abutted against the tact switch 16. When the sealing cover 2 is loosened, the movable portion is pressed to be reduced to be protruded downward and separated from the tact switch 16. In this embodiment, the control module and the detection circuit of the switching assembly are both installed on the control board 13 inside the sealing cover 2. The anti-counterfeiting detection mechanism further comprises a pressure transmission shaft 14, and two ends of the pressure transmission shaft 14 respectively abut against the light touch switch 16 and the sampling container 1 by utilizing extrusion force between the sealing cover 2 and the sampling container 1 in a covering state. When the sealing cover 2 is loosened, the pressure transmission shaft 14 moves downward by its own weight to be separated from the tact switch 16.

In another embodiment, the anti-counterfeit detection mechanism further includes a spring 15 sleeved on the pressure transmission shaft 14, a top end of the spring 15 abuts against the sealing cover 2, and a bottom end of the spring 15 abuts against the pressure transmission shaft 14. When the sealing cover 2 is loosened, the pressure transmission shaft 14 is rapidly separated from the tact switch 16 by its own weight and the elastic restoring force of the spring 15. The movable part also comprises a trigger ball 17 which is arranged in the sealing cover 2 and is abutted against the pressure transmission shaft 14, and a through hole with the aperture smaller than the diameter of the trigger ball 17 is arranged on the contact surface of the sealing cover 2 and the sampling container 1 so as to enable the trigger ball 17 to protrude from the through hole. When the sealing cover 2 is covered, the trigger ball 17 is extruded upwards by the sampling container 1, and then the pressure transmission shaft 14 is driven to extrude upwards and abut against the light touch switch 16, so that the detection circuit is closed. When the sealing cover 2 is loosened, the trigger ball 17 is released downwards, so that the pressure transmission shaft 14 moves downwards to be separated from the tact switch 16, and the detection circuit is disconnected.

As shown in fig. 7 to 8, optionally, the sealing cover 2 is provided with a mounting groove for mounting the pressure transmission shaft 14 therein. The trigger ball 17 has been placed to the bottom of mounting groove, and the bottom of mounting groove is equipped with the through-hole that the aperture is greater than the diameter of trigger ball 17 to make trigger ball 17 protrude from the through-hole. The top end of the pressure transmission shaft 14 penetrates through the installation groove and abuts against the light touch switch 16, the bottom end of the pressure transmission shaft 14 abuts against the trigger ball 17, the two ends of the pressure transmission shaft 14 respectively abut against and abut against the light touch switch 16 and the trigger ball 17 through utilizing the extrusion force between the sealing cover 2 and the sampling container 1 in the covering and closing state, the trigger ball 17 abuts against the sampling container 1, the trigger ball 17 is in point-to-surface contact with the sampling container 1, and therefore the looseness of the sealing cover 2 is more sensitive.

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 1. 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 the management terminal can be brought to the site by a worker and then is in wireless connection with the communication module, so that monitoring data stored in the control module can be read wirelessly. In addition, in the utility model discloses an in other embodiments, communication module can omit, after dragging for sampling container 1 from the water environment, it can to utilize management terminal to pass through the monitoring data of interface direct reading control module. In this embodiment, the control module, the pressure measuring module 19, the communication module and the detection circuit are all mounted on the control board 13 inside the sealing cover 2.

Optionally, an identification module is also mounted on the sampling container 1. 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, the sample inlet of the flow channel 24 is equipped with a filtering device to filter out large particle impurities in the liquid sample.

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 pickup and a video acquisition device which are connected with the control module are also arranged in the sealing cover 2. The control module is also used for controlling the sampling state according to the detection result of the pressure sensor or the liquid level sensor so as to realize automatic quantitative sampling. The pressure detection result of the pressure sensor 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 1 is monitored in real time by the pressure sensor or the liquid level sensor, the detection result is transmitted to the control module, and the control module controls the sampling state according to the detection result, so that automatic quantitative sampling is realized.

Preferably, the sealing cover 2 is further provided with a positioning module electrically connected with the control module, and the control module is further configured to obtain position information of the sampling device 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 device 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 device can be recovered conveniently, the source liquid can be positioned and monitored in the whole process in the subsequent source liquid transportation process, the source liquid is prevented from being tampered in the transportation process, and the anti-counterfeiting performance of the source liquid is further improved.

After the sampling device is put on the sampling liquid level, the sample inlet of the overflow channel 24 sinks below the liquid level, so that a sample to be collected is collected into the sampling container 1 from the sample inlet, and the gas in the sampling container 1 is discharged to the outside from the gas outlet. Optionally, a weight 18 is provided in the sealing cap 2. Optionally, the sampling container 1 is further provided with a gyroscope sensor electrically connected with the control module and used for detecting the posture of the sampling container 1, and the control module 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 1 does not conform to the preset posture range. Presetting the gesture scope that sampling device drops into in the water environment in the control module, sampling device's gesture can only ensure smoothly to take a sample when presetting the gesture within range, detect sampling device's current gesture and transmit the testing result to control module through the gyroscope sensor, in case control module compares out sampling device's current gesture and is not conform to when presetting the gesture scope, it is not conform to the requirement to mean that sampling device's current gesture, probably can't normally advance the appearance, for example overflow channel 24 is located the liquid level top, control module generates alarm information promptly and transmits to remote management platform through communication module, and in time remind the staff to carry out artificial adjustment to this sampling device's gesture, or control module notes gesture abnormal event, remind the staff to overhaul this sampling device's structure.

In this embodiment, the lower edge of the sealing cover 2 extends to closely fit with the sampling container 1 to prevent the sealing cover 2 from being pried open by external force. The source liquid in the sampling container 1 is effectively prevented from being damaged by the detachment prevention structure.

As shown in fig. 9-10, the anti-counterfeit detection mechanism of the present embodiment is used for detecting whether the sealing cover 2 covering the sampling container 1 is opened, and the anti-counterfeit detection mechanism includes an induction circuit 27 disposed in the sealing cover 2, a permanent magnet disposed on the sampling container 1, and a magnetic induction switch 28 disposed in the sealing cover 2 and corresponding to the permanent magnet and used for controlling the on-off of the induction circuit 27. The utility model discloses an anti-counterfeiting detection mechanism, through set up induction circuit 27 in sealed lid 2, and set up magnetic induction switch 28 control break-make on the induction circuit 27, and through set up the permanent magnet on sampling container 1, and when sealed lid 2 lid fits on sampling container 1, the position of the permanent magnet on the sampling container 1 and the magnetic induction switch 28 in the sealed lid 2 is corresponding, therefore magnetic induction switch 28 is closed under the magnetic field effect of permanent magnet, thereby make induction circuit 27 communicate, thereby judge that sealed lid 2 is the state of covering, when sealed lid 2 unscrews and rotates certain angle or separate with sampling container 1, the relative position between magnetic induction switch 28 and the permanent magnet changes, magnetic induction switch 28 breaks away from the magnetic field of permanent magnet and breaks off, thereby make induction circuit 27 break off, thereby judge that sealed lid 2 is not hard up state or open mode; or the magnetic induction switch 28 is switched off under the action of the magnetic field of the permanent magnet, so that the induction circuit 27 is switched off, and the sealing cover 2 is judged to be in a covering state, when the sealing cover 2 is unscrewed and rotates for a certain angle or is separated from the sampling container 1, the relative position between the magnetic induction switch 28 and the permanent magnet is changed, the magnetic induction switch 28 is separated from the magnetic field of the permanent magnet and is switched on, so that the induction circuit 27 is communicated, and the sealing cover 2 is judged to be in a loosening state or an opening state, so that the sample liquid in the sampling container 1 is judged to be invalid. In addition, the sealing cover 2 is in threaded matching connection with the sampling container 1, the sealing cover 2 is opened or screwed after being rotated reversely for a fixed number of turns, and in the rotating process of the sealing cover 2, the state of the magnetic induction switch 28 is changed, so that the number of turns of the sealing cover 2 is judged according to the number of times of turning on and off the magnetic induction switch 28, and the unscrewing degree of the sealing cover 2 or whether the sealing cover 2 is screwed completely is judged.

The permanent magnet is attached to the inner wall surface of the container mouth of the sampling container 1, the outer wall surface of the container mouth of the sampling container 1, and/or the protrusion 21 of the sampling container 1 that contacts the sealing cap 2. The permanent magnets comprise a security magnetic stripe 25 and/or a strong magnetic column 26. Optionally, the inner side wall surface of the container opening of the sampling container 1 is provided with a groove for mounting the anti-counterfeiting magnetic strip 25. Alternatively, the sampling container 1 may be provided with a protrusion 21 contacting the sealing cap 2 on the outside of the container mouth, and the strong magnetic column 26 may be attached to the protrusion 21.

Optionally, the anti-counterfeit detection mechanism further comprises a communication module connected to the sensing circuit 27 for transmitting detection information. The communication module transmits the information of the disconnection of the detection circuit to the remote management platform, so that whether the sealing cover 2 is opened or not is known. The communication module transmits the information of the disconnection of the sensing circuit 27 to the remote management platform, so as to know whether the sealing cover 2 is opened or not. Optionally, the anti-counterfeit detection mechanism further comprises a display module connected to the sensing circuit 27 for displaying the detection information. Whether the sealing cover 2 is opened or not is known according to the display of the display module. Optionally, the anti-counterfeit detection mechanism further comprises a sound module connected to the sensing circuit 27 for identifying the detection information. Whether the sealing cover 2 is opened or not is known according to the voice or the ring of the sound module. The sealing cover 2 is also internally provided with a power supply module 9 connected with a control panel 13.

As shown in fig. 11-14, the sampling device further includes an anti-detachment mechanism disposed in the sampling container 1 and between the sampling container 1 and the sealing cover 2, the anti-detachment mechanism includes a lifting locking unit 29 installed in the sealing cover 2 and a limiting disc 32 covering the container opening of the sampling container 1 and movably connected to the movable end of the lifting locking unit 29, a limiting groove 23 is radially disposed on the bottom surface of the limiting disc 32, and a limiting block 22 matched with the limiting groove 23 is disposed on the inner side wall surface of the container opening of the sampling container 1. At least one pin rod 30 is installed on the movable end of the lifting locking unit 29, a pin hole 31 matched with the pin rod 30 is formed in the limiting disc 32, the pin rod 30 is driven to descend by the lifting locking unit 29 to be inserted into the pin hole 31 to be connected with the limiting disc 32, and therefore circumferential limiting is conducted on the sealing cover 2 through the limiting disc 32. The plurality of limiting blocks 22 are uniformly arranged along the circumferential direction of the container opening of the sampling container 1. The stopper groove 23 is arranged in the radial direction of the stopper disk 32. When the sealing cover 2 covers the sampling container 1, the limiting groove 23 on the limiting disc 32 is matched with the limiting block 22 on the sampling container 1, the pin rod 30 is driven to descend by controlling the lifting locking unit 29 to be inserted into the pin hole 31 of the limiting disc 32 to be connected with the limiting disc 32, so that the sealing cover 2 is limited circumferentially by the limiting disc 32, and the sealing cover 2 cannot rotate circumferentially and be unscrewed due to the matching of the limiting groove 23 and the limiting block 22, so that the sealing cover 2 in a covering state is locked and fixed; when the sealing cover 2 needs to be opened to detect the sample liquid in the sampling container 1, the lifting locking unit 29 is controlled to drive the pin rod 30 to ascend and move out of the pin hole 31 to be separated from the limiting disc 32, then the sealing cover 2 is rotated to be separated from the sampling container 1, and finally the limiting disc 32 is taken down to perform sampling detection.

In conclusion, through the anti-fake detection mechanism who sets up between sampling container 1 and sealed lid 2, can cross to sealed lid 1 open carry out effectual discernment and record, with this can be convenient learn sampling container 1 after the sampling is accomplished, sealed lid 2 is with sampling container 1 separation, thereby can judge whether the inside appearance liquid of sampling container 1 opens and is effective, through the sealed lid 2 in be used for with sampling container 1 swing joint's anti-disassembly mechanism, after the sampling has been dug, open sealed lid 2 replacement, dilute the possibility of appearance liquid, with this authenticity, validity, the representativeness of guaranteeing the inside appearance liquid of sampling container 1.

As shown in fig. 15-18, the sampling device of the present embodiment includes a sampling container 1, a sealing cover 2 covering the sampling container 1, a communication channel formed on the sealing cover 2, and the communication channel is communicated with an inner cavity of the sampling container 1; the sealing cover 2 comprises a switching component which is fixed inside and arranged along the path of the communication channel, and the switching component and the communication channel can be isolated or communicated; still including setting up in sampling container 1, arrange the anti-fake detection mechanism between sampling container 1 and sealed lid 2, anti-fake detection mechanism includes at least one telescopic movable part, is equipped with protruding portion 21 on the sampling container 1, and the protruding sealed lid 2 of movable part extends towards sampling container 1, and the setting of the separable contact of protruding portion 21 with sampling container 1. In the present embodiment, the protrusion 21 is located outside the container mouth of the sampling container 1 and below the movable portion. In the sampling device provided by the utility model, the sample liquid enters the sampling container 1 through the communicating channel arranged on the sealing cover 2; the sampling channel is extremely conveniently isolated or connected through the switching assembly arranged along the sampling channel, sampling of the sampling container 1 according to requirements is realized, working condition requirements of different scenes are met, and the sampling channel is isolated and sealed after sampling is finished, so that the sealing performance of the sampling container 1 is ensured; whether the sampling container 1 is separated from the sealing cover 2 after sampling can be automatically identified through the anti-counterfeiting detection mechanism arranged between the sealing cover 2 and the sampling container 1, so that the effectiveness of the sample liquid in the sampling container 1 is judged; with this, through the switching module who arranges along sampling channel, conquered from the counterfeit of appearance liquid of kind channel, can avoid sampling container 1 to be opened the counterfeit of appearance liquid through anti-fake detection mechanism, guaranteed that the sampling is accomplished the back, sampling container 1 inside appearance liquid can not influenced by external factor, for example: replacement, dilution and the like, and the authenticity of the sample liquid is ensured from the source, so that the validity of water quality monitoring data is ensured.

The communicating channel comprises a first channel 4 and a second channel 5, when the switching component is communicated with the first channel 4 and the second channel 5, the sample liquid enters the sampling container 1 through the first channel 4, and the gas in the sampling container 1 is discharged to the outside through the second channel 5, so that sample introduction is started; the first channel 4 and the second channel 5 are separated by the switching assembly, so that the sample feeding is stopped. Specifically, the switching assembly controls the opening of the channel interface of the first channel 4 and the channel interface of the second channel 5, so that the first channel 4 and the second channel 5 are communicated with the inner cavity of the sampling container 1, and after the sampling container 1 is emptied of the sample liquid, a pressure difference is formed between the inner cavity of the sampling container 1 and the liquid level of the sample liquid, so that the sample liquid enters the inner cavity of the sampling container 1 from the first channel 4 and/or the second channel 5, and the sample introduction of the sample liquid is realized; when the switching component is switched to a cut-off state with the first channel 4 and the second channel 5, the inner cavity of the sampling container 1 forms a closed space, so that sample introduction is stopped, and sample liquid collection is completed.

Optionally, the switching assembly controls the opening of the sample inlet of the first channel 4 and the gas outlet of the second channel 5, so that the sample liquid enters the inner cavity of the sampling container 1 through the first channel 4, and the gas in the inner cavity of the sampling container 1 is discharged through the second channel 5, thereby starting sample injection; through switching over closing of subassembly control first passageway 4's introduction port and second passageway 5's gas outlet, make appearance liquid can't get into sampling container 1 from first passageway 4 and second passageway 5 in to prevent that the appearance liquid of gathering in the sampling container 1 from first passageway 4 and second passageway 5 outflow, thereby stop to advance the appearance, accomplish the collection of appearance liquid. Optionally, the switching assembly controls the opening of the sample outlet of the first channel 4 and the gas inlet of the second channel 5, so that the sample liquid enters the inner cavity of the sampling container 1 through the first channel 4, and the gas in the inner cavity of the sampling container 1 is discharged through the second channel 5, thereby starting sample injection; through switching over closing of subassembly control first passageway 4's introduction port and second passageway 5's gas outlet, make appearance liquid can't get into sampling container 1 from first passageway 4 and second passageway 5 in to prevent that the appearance liquid of gathering in the sampling container 1 from first passageway 4 and second passageway 5 outflow, thereby stop to advance the appearance, accomplish the collection of appearance liquid.

Optionally, the switching assembly includes a lifting driving unit 6 installed in the sealing cover 2, a fixing plate 7 installed on an output end of the lifting driving unit 6, two pistons 8 installed on the fixing plate 7, a power module 9 connected to an input end of the lifting driving unit 6, and a control module for controlling the starting and stopping of the lifting driving unit 6, the lifting driving unit 6 drives the fixing plate 7 to ascend, so that the two pistons 8 are respectively separated from the sample inlet of the first channel 4 and the inner pipe of the second channel 5 to start sample injection, and the lifting driving unit 6 drives the fixing plate 7 to descend, so that the two pistons 8 are respectively plugged into the inner pipe of the first channel 4 and the inner pipe of the second channel 5 to stop sample injection; or the lifting driving unit 6 drives the fixing plate 7 to descend, so that the two pistons 8 are separated from the sample outlet of the first channel 4 and the inner pipeline of the second channel 5 respectively to start sample injection, and the lifting driving unit 6 drives the fixing plate 7 to ascend, so that the two pistons 8 are respectively plugged into the inner pipeline of the first channel 4 and the inner pipeline of the second channel 5 to stop sample injection.

In this embodiment, the sealing cover 2 is further provided with a pressure measuring cavity 20 communicated with the sample inlet of the first channel 4. The sampling container 1 further comprises a top cover 3 which covers the top of the sealing cover 2 and is used for installing a fixing plate 7, an air hole is formed between the top cover 3 and the sealing cover 2, the air hole is communicated with the first channel 4 and/or the second channel 5, and the air hole and the inner cavity of the sampling container 1 can be isolated or communicated under the action of the cavity switching component; therefore, through the air holes communicated with the first channel 4 and/or the second channel 5, when the first channel 4 and/or the second channel 5 is below the liquid level and the sample liquid is prevented from existing in the pipeline of the first channel 4 and/or the second channel 5, the inner cavity of the sampling container 1 forms an airtight stable state, so that the inner cavity of the sampling container 1 can always smoothly flow gas and/or liquid with the outside, and the sample injection stability is ensured.

The bottom of the sealing cover 2 is provided with a cover plate 12 for covering the opening of the sampling container 1, the sample outlet of the first channel 4 is connected with the cover plate 12, and the gas inlet of the second channel 5 is connected with the cover plate 12. The lifting driving unit 6 is installed in the sealing cover 2, and an output end of the lifting driving unit 6 passes through the top of the sealing cover 2 to be connected with a fixing plate 7 installed in the top cover 3. Install on the fixed plate 7 and advance a kind piston 8 and exhaust piston 8, be equipped with on the sealed lid 2 and be used for advancing a kind piston hole that the piston 8 of advancing a kind passed and be used for the exhaust piston hole that the exhaust piston 8 passed, and second passageway 5 and exhaust piston jogged joint, exhaust piston hole and 8 clearance fit of exhaust piston to make the inner chamber and the second passageway 5 of top cap 3 be connected. When the sample introduction is started, the sample introduction piston 8 moves upwards to be separated from the inner pipeline of the first channel 4 and is plugged into the sample introduction piston hole, external sample liquid firstly enters the pressure measuring cavity 20 and then enters the inner cavity of the sampling container 1 from the first channel 4, and the exhaust piston 8 moves upwards to be separated from the inner pipeline of the second channel 5, so that gas in the sampling container 1 enters the top cover 3 from a gap between the exhaust piston hole and the exhaust piston 8 through the second channel 5 and is finally discharged from a gas hole between the top cover 3 and the sealing cover 2. When the sample feeding is stopped, the sample feeding piston 8 penetrates through the top of the sealing cover 2 and is plugged into the inner pipeline of the first channel 4 below, and the exhaust pistons 8 penetrate through the top of the sealing cover 2 and are plugged into the inner pipeline of the second channel 5 below. The lifting driving unit 6 adopts a lifting motor.

As shown in fig. 15-16, alternatively, the switching assembly comprises a rotation driving unit 10 installed in the sealing cover 2, a switching piece 11 connected with an output end of the rotation driving unit 10, a power module 9 connected with an input end of the rotation driving unit 10, and a control module for controlling the rotation driving unit 10 to start and stop, a cover plate 12 for covering an opening of the sampling container 1 is provided at the bottom of the sealing cover 2, a flow opening is formed on the cover plate 12, the switching piece 11 is installed between the cover plate 12 and the flow passage and is provided with two flow holes, the switching piece 11 is rotated by the rotation driving unit 10, so that the two overflowing holes on the switching piece 11 are respectively communicated with the first channel 4 and the second channel 5 or are sealed in a staggered mode, thereby, the first channel 4 and the second channel 5 are separated from or connected with the inner cavity of the sampling container 1.

Alternatively, the sample outlet of the first channel 4 and the gas inlet of the second channel 5 are opposite to start sample injection, and the switching piece 11 is rotated by the rotation driving unit 10, so that the switching piece 11 is blocked on the sample outlet of the first channel 4 and the gas inlet of the second channel 5 to stop sample injection; or the rotation driving unit 10 rotates the switching piece 11, so that the two overflowing holes on the switching piece 11 respectively face the sample inlet of the first channel 4 and the gas outlet of the second channel 5 to start sample injection, and the rotation driving unit 10 rotates the switching piece 11, so that the switching piece 11 is blocked on the sample inlet of the first channel 4 and the gas outlet of the second channel 5 to stop sample injection.

As shown in fig. 19 to 20, alternatively, the switching assembly includes a rotation driving unit 10 installed in the sealing cover 2, a switching piece 11 connected to an output end of the rotation driving unit 10, a power module 9 connected to an input end of the rotation driving unit 10, and a control module for controlling the rotation driving unit 10 to start and stop, a cover plate 12 for covering an opening of the sampling container 1 is provided at a bottom of the sealing cover 2, a flow hole is formed in the cover plate 12, the switching piece 11 is installed between the cover plate 12 and the flow channel and is provided with two flow holes, the switching piece 11 is rotated by the rotation driving unit 10, so that the two overflowing holes on the switching piece 11 are respectively communicated with the first channel 4 and the second channel 5 or are sealed in a staggered mode, thereby, the first channel 4 and the second channel 5 are separated from or connected with the inner cavity of the sampling container 1.

Alternatively, the sample outlet of the first channel 4 and the gas inlet of the second channel 5 are opposite to start sample injection, and the switching piece 11 is rotated by the rotation driving unit 10, so that the switching piece 11 is blocked on the sample outlet of the first channel 4 and the gas inlet of the second channel 5 to stop sample injection; or the rotation driving unit 10 rotates the switching piece 11, so that the two overflowing holes on the switching piece 11 respectively face the sample inlet of the first channel 4 and the gas outlet of the second channel 5 to start sample injection, and the rotation driving unit 10 rotates the switching piece 11, so that the switching piece 11 is blocked on the sample inlet of the first channel 4 and the gas outlet of the second channel 5 to stop sample injection.

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. A sampling device is characterized in that a sampling device is provided,

the sampling device comprises a sampling container (1) and a sealing cover (2) connected with the sampling container (1), wherein an overflowing channel (3) communicated with the sampling container (1) is processed on the sealing cover (2); the device also comprises a switching component which is fixed in the sealing cover (2) and arranged along the path of the overflowing channel (3), and the switching component and the overflowing channel (3) can be separated or communicated;

the sampling container (1) is a compression structure with variable shape, and the internal volume and/or pressure of the compression structure can be set variably.

2. The sampling device of claim 1,

the sampling container (1) is of a compressible/extensible structure, pressure difference is formed between the inside and the outside of the sampling container (1) by compressing the sampling container (1) and closing the switching assembly, the switching assembly is opened during sampling, and sample liquid is automatically quantitatively and forcedly conveyed to an inner cavity of the sampling container (1) from the overflowing channel (3) by using the pressure difference between the inside and the outside of the sampling container (1).

3. The sampling device of claim 1,

the switching component comprises a rotary driving unit (7) arranged in the sealing cover (2), a switching piece (8) connected with the output end of the rotary driving unit (7), a power module (6) connected with the input end of the rotary driving unit (7) and a control module for controlling the start and stop of the rotary driving unit (7), the switching piece (8) is provided with an overflowing hole,

the switching piece (8) is rotated by the rotation driving unit (7), so that the overflowing hole of the switching piece (8) is opposite to the sample inlet of the overflowing channel (3) to start sample injection, and the switching piece (8) is rotated by the rotation driving unit (7) to be blocked on the sample inlet of the overflowing channel (3) to stop sample injection; or

The rotating driving unit (7) rotates the switching piece (8), so that the overflowing hole of the switching piece (8) is opposite to the sample outlet of the overflowing channel (3) to start sample discharging, and the rotating driving unit (7) rotates the switching piece (8), so that the switching piece (8) is blocked on the sample outlet of the overflowing channel (3) to stop sample discharging.

4. The sampling device of claim 1,

the switching component comprises a lifting driving unit (4) arranged in the sealing cover (2), a fixing plate arranged on the output end of the lifting driving unit (4), a piston (5) arranged on the fixing plate, a power supply module (6) connected with the input end of the lifting driving unit (4) and a control module used for controlling the starting and stopping of the lifting driving unit (4),

the lifting unit drives the fixed plate to rise, so that the piston (5) is separated from the sample inlet of the overflowing channel (3) to start sample injection, and the lifting unit drives the fixed plate to fall, so that the piston (5) is plugged into the sample inlet of the overflowing channel (3) to stop sample injection; or

The lifting unit drives the fixing plate to descend, so that the piston (5) is separated from the sample outlet of the overflowing channel (3) to start sample discharging, and the lifting unit drives the fixing plate to ascend, so that the piston (5) is plugged into the sample outlet of the overflowing channel (3) to stop sample discharging.

5. The sampling device of claim 1,

the sampling container (1) and the sealing cover (2) are of split structures, and the sampling device further comprises an anti-counterfeiting detection mechanism arranged between the sampling container (1) and the sealing cover (2).

6. The sampling device of claim 5,

the anti-counterfeiting detection mechanism comprises at least one telescopic movable part, a protruding part is arranged on the sampling container (1), and the protruding sealing cover (2) of the movable part extends towards the sampling container (1) and is in separable contact with the protruding part of the sampling container (1).

7. The sampling device of claim 6,

the anti-counterfeiting detection mechanism comprises a detection circuit arranged in the sealing cover (2) and a light touch switch (14) used for controlling the on-off of the detection circuit,

the two ends of the movable part respectively prop against the tact switch (14) and the sampling container (1) by utilizing the extrusion force between the sealing cover (2) and the sampling container (1) in a covering state, and the tact switch (14) is triggered to enable the detection circuit to form a closed loop and generate a continuous signal, so that the sealing cover (2) and the sampling container (1) are judged to be in the covering state;

the movable part is separated from the light touch switch (14) to cut off the detection circuit, thereby judging whether the sealing cover (2) is separated from the sampling container (1).

8. The sampling device of claim 7,

the movable part comprises a pressure transmission shaft (12) penetrating through the sealing cover (2) and a spring (13) sleeved on the pressure transmission shaft (12), the top end of the spring (13) is abutted against the sealing cover (2), and the bottom end of the spring (13) is abutted against the pressure transmission shaft (12).

9. The sampling device of claim 5,

the anti-counterfeiting detection mechanism comprises an induction circuit (27) arranged in the sealing cover (2), a permanent magnet arranged on the sampling container (1) and a magnetic induction switch (28) which is arranged in the sealing cover (2) and corresponds to the permanent magnet and is used for controlling the on-off of the induction circuit (27).

10. The sampling device of claim 5,

the sampling device also comprises a communication module which is connected with the anti-counterfeiting detection mechanism and is used for transmitting detection information.

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