CN114486360A - Multifunctional sampling device and control method thereof - Google Patents

Abstract

The invention discloses a multifunctional sampling device, comprising a sampling valve, a liquid outlet pipe and a driving device. The sampling valve includes a liquid inlet and a liquid outlet; the liquid outlet pipe includes a first pipe section and a second pipe section, the inlet of the first pipe section is communicated with the liquid outlet of the sampling valve, and one end of the second pipe section is the liquid outlet of the liquid outlet pipe; the driving device is arranged between the first pipe section and the second pipe section, and the driving device drives the second pipe section to move relative to the first pipe section. By adding a driving device to the sampling device, the invention can realize intelligent sampling, reduce labor intensity, and improve the sampling accuracy of the sampling device during liquid sampling. It causes damage to the staff, facilitates sampling, realizes the intelligence of the device and the diversification of functions, and has a simple structure and low cost.

Description

A multifunctional sampling device and its control method

technical field

The invention belongs to the field of liquid sampling, in particular to a multifunctional sampling device and a control method thereof.

Background technique

In the process of daily production and life, many sampling devices have relatively single functions and cannot be replaced. When testing other functions of liquids, multiple devices are often required, which is easy to waste resources. Aging, erosion and other reasons cause a small amount of fluid leakage. There are various influencing factors for the shut-off device to stop the system or isolate it for repair or replacement. For example, the system cannot be isolated and the economy of system isolation is poor. In this case, connection, drainage and seepage can be used. However, in actual operation, it is easy to cause pollution on the production site. If the fluid is a dangerous product or an environmental pollution medium, the method of connecting and draining the leaking fluid will be greatly restricted. The existing plugging technology with pressure basically uses The hole injection method achieves complete leakage plugging, and the fluid cut-off devices such as valves are blocked at one time, and there is no possibility of reuse and repair, and professional personnel under pressure are required to operate the leakage plugging, which has high risks and high costs.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a multifunctional sampling device and a control method thereof. The driving device drives the second pipe section to be movable relative to the first pipe section, so that the sampling device can be automated and intelligent, with simple structure, convenient disassembly and low cost.

In order to solve the above-mentioned technical problems, the basic idea of the technical solution adopted in the present invention is to provide a multifunctional sampling device, including:

Sampling valve, including liquid inlet and outlet;

The liquid outlet pipe includes a first pipe section and a second pipe section, the first pipe section is communicated with the liquid outlet of the sampling valve, and one end of the second pipe section is the liquid outlet of the liquid outlet pipe;

A driving device is arranged between the first pipe section and the second pipe section, and is used for driving the second pipe section to move relative to the first pipe section.

By arranging a drive device on the sampling device, the invention can realize intelligent sampling, reduce labor intensity and improve the sampling accuracy of the sampling device during liquid sampling.

Further, one end of the driving device is arranged on the first pipe section, and the other end of the driving device is movably connected with the second pipe section;

The driving device includes a support and a connecting rod, the support is fixed on the first pipe section, the connecting rod is movably connected with the support, and the connecting rod is movably connected with the second pipe section;

Preferably, an action mechanism is further included for driving the connecting rod to control the movement of the second pipe section.

Further, the liquid outlet pipe further includes a flexible pipe, which is arranged between the first pipe section and the second pipe section and is used for bending and stretching under the driving of the second pipe section.

Further, a first solenoid valve is provided on the first pipe section, and a second solenoid valve is provided on the second pipe section;

The first solenoid valve and the second solenoid valve are used to control the communication or closing of the liquid outlet pipe.

Further, it also includes a plurality of first pipe sections, the plurality of first pipe sections have a plurality of first functional modules, and are replaceably connected between the sampling valve and the flexible pipe;

A plurality of second pipe sections, the plurality of second pipe sections having a plurality of second functional modules, are replaceably communicated with the outlet of the flexible pipe.

Further, an image acquisition device is provided on the second pipe section, which is arranged on the outer peripheral wall of the second pipe section, and is used for acquiring the position of the liquid discharging bottle/sampling bottle.

Further, it also includes a control module, which is respectively connected to the driving device and the image collector, and is used for receiving the position of the identification liquid discharge bottle/sampling bottle from the image collector, and to control the second pipe section to move to the liquid discharge bottle. / Above the sampling bottle, rinse / sample.

Preferably, an automatic sampling tray is also included, and the automatic sampling tray has a mark and a place where the liquid discharge bottle/sampling bottle is placed corresponding to the mark, and the image collector identifies the mark and obtains the information of the liquid discharge bottle/sampling bottle. Location.

A control method of a multifunctional sampling device, comprising the following steps:

S1. Receive a sampling instruction;

S2, control the second pipe section of the liquid outlet pipe to move to the preset position of the liquid discharge bottle/sampling bottle;

S3, control the liquid out of the liquid outlet pipe.

Further, the following steps are also included in the S2 step,

S21, controlling the image collector on the second pipe section to obtain the position of the liquid release bottle/sampling bottle;

S22. Control the driving device so that the outlet of the second pipe section is above the opening of the liquid release bottle/sampling bottle.

Further, in the step S3, the following steps are also included:

S31. Control the liquid discharge from the liquid discharge pipe;

S32. Obtain the liquid discharge time of the liquid discharge pipe;

S33, determine whether the liquid outlet time of the liquid pipe is greater than or equal to the preset time, and if not, continue to execute S31;

Preferably, in the step S33, if yes, stop the liquid discharge, control the driving device to return to the preset original position, and send the sampling completion information.

After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

(1) In the present invention, by arranging the first pipe section and the second pipe section in the sampling device, and adding a driving device between the first pipe section and the second pipe section, the intelligent sampling can be realized, the labor intensity can be reduced, and the sampling of the sampling device can be improved. By setting the drive device, it can prevent the production site environment from being polluted or cause damage to the staff, facilitate sampling, and connect with the control module to realize the intelligence of the device and the diversification of functions.

(2) The present invention realizes the free combination of various functions by arranging multiple first pipe sections and second pipe sections on the sampling device, which can be replaced in real time according to the actual situation of the production site, increases the practicability of the sampling device, and is convenient for disassembly and structure. Simple and low cost.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1 is the structural representation of the multifunctional sampling device of the present invention;

Fig. 2 is the automatic sampling tray schematic diagram of the present invention;

Fig. 3 is a flow chart of the control method of a multifunctional sampling device of the present invention;

Fig. 4 is a flow chart of the control method of a multifunctional sampling device of the present invention;

5 is a schematic diagram of a plurality of first pipe sections and second pipe sections of the present invention;

6 is a schematic diagram of a plurality of first pipe sections and second pipe sections of the present invention;

Fig. 7 is a schematic diagram of a plurality of first pipe sections and second pipe sections of the present invention.

In the figure: 1. Sampling valve; 2. Driving device; 21. Supporting member; 22. Connecting rod; 3. Liquid outlet pipe; 31. First pipe section; 32. Second pipe section; 33. Flexible pipe; 4. First Solenoid valve; 5. Second solenoid valve; 6. Automatic sampling tray; 61, First mark; 62, Second mark; 63, Liquid discharge bottle placement mark; 64, Sampling bottle placement mark; 7, Image collector; 101 102, Tesla valve; 103, pressure sensor; 104, dosing/mixer; 105, temperature sensor; 106, flow sensor; 107, liquid storage tank; 108, electric valve.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in FIG. 1 to FIG. 7 , a multifunctional sampling device according to the present invention includes a sampling valve 1 , a liquid outlet pipe 3 , and a driving device 2 .

The sampling valve 1 includes a liquid inlet and a liquid outlet.

The liquid outlet pipe 3 includes a first pipe section 31 and a second pipe section 31. The inlet of the first pipe section 31 is connected to the liquid outlet of the sampling valve 1, and one end of the second pipe section is the liquid outlet of the liquid outlet pipe. .

The driving device 2 is disposed between the first pipe section 31 and the second pipe section 32 , and the driving device 2 drives the second pipe section 32 to move relative to the first pipe section 31 .

In the present invention, the liquid outlet pipe 3 is divided into a first pipe section 31 and a second pipe section 32, and a driving device 2 is arranged between the first pipe section 31 and the second pipe section 32 to drive the second pipe section 32 relative to the first pipe section 32. One pipe section 31 can be moved, which realizes the intelligentization of sampling, reduces labor intensity, and improves the sampling accuracy of the sampling device. By setting the driving device 2, the production site environment is prevented from being polluted or damage to the staff is prevented, sampling is convenient, and the realization of The intelligence of the device and the diversification of functions.

Further, one end of the driving device 2 is disposed on the first pipe section 31 , and the other end of the driving device 2 is movably connected with the second pipe section 32 .

The driving device 2 includes a support member 21 and a connecting rod 22, the support member 21 is fixed on the first pipe section 31, the connecting rod 22 is movably connected with the support member 21, and the connecting rod 22 is connected with the first pipe section 31. The two pipe sections 32 are flexibly connected.

Preferably, an action mechanism (such as a motor and a hydraulic cylinder) is also included for driving the connecting rod 22 to control the movement of the second pipe section 32 .

By fixing the supporting member 21 on the first pipe section 31, the connecting rod 22 can be telescopic or movable relative to the supporting member 21, and the connecting rod 22 is movably connected with the second pipe section 32, which is convenient for the driving device 2 to pass through The control link 22 drives the second pipe section 32 to expand, rotate or move, so as to realize the automation and intelligence of the sampling device and increase the user's experience.

Specifically, as shown in FIG. 1 , one end of the driving device 2 is mounted on the first pipe section 31, and the other end is movably connected to the second pipe section 32, so that the driving device 2 can control the second pipe section 32 to move, Realize the intelligence of sampling, increase sampling efficiency, and improve sampling accuracy.

Further, the liquid outlet pipe 3 further includes a flexible pipe 33 arranged between the first pipe section 31 and the second pipe section 32 for bending and stretching under the driving of the second pipe section 32 .

In the present invention, by disposing a flexible pipe 33 between the first pipe section 31 and the second pipe section 32, it is convenient for the driving device 2 to move the second pipe section 32, and the first pipe section 31 and the second pipe section 32 are prevented from being directly connected. The driving device 2 is difficult to move, and it is inconvenient to change the direction or shrink, which improves the sensitivity of the sampling device and prevents the sampling device from being damaged.

The flexible tube 33 includes a self-fixing metal hose.

The self-fixing metal hose can be made into a corresponding U-shaped shape or other shape according to the situation on site, which has strong pertinence; when sampling, the self-fixing metal hose can follow the driving device 2 to carry out Move, so that the sampling medium can flow out directly, which is convenient for sampling; after sampling, the self-fixing metal hose can be directly adjusted to the top of the sampling valve 1 under the drive of the driving device 2 according to its own characteristics, which can prevent the residual medium in the pipe from flowing out. , to enhance the user experience.

Further, the first pipe section 31 is provided with a first solenoid valve 4 , and the second pipe section 32 is provided with a second solenoid valve 5 .

The first solenoid valve 4 and the second solenoid valve 5 are used to control the communication or closing of the liquid outlet pipe 3 .

In the present invention, the first solenoid valve 4 and the second solenoid valve 5 are arranged to realize automation and intelligence of the sampling device. When in use, after the outlet end of the second pipe section 32 is opposite to the opening of the sampling bottle/discharging bottle, Only then can the first solenoid valve 4 and the second solenoid valve 5 be controlled to open, and the sampling operation is carried out, so as to avoid harm to the experiment personnel when harmful sampling is carried out, and reduce the use effect and the use efficiency.

Further, it also includes a plurality of first pipe sections 31, the plurality of first pipe sections 31 have a plurality of first functional modules, and are replaceably connected between the sampling valve 1 and the flexible pipe 33;

A plurality of second pipe sections 32 , the plurality of second pipe sections 32 having a plurality of second functional modules, which are replaceably communicated with the outlet of the flexible pipe 33 .

By setting a plurality of first pipe sections 31 and second pipe sections 32 in the present invention, when liquid sampling is performed, a variety of functions can be freely combined, and real-time replacement can be performed according to the actual situation of the production site, which increases the practicability of the sampling device and facilitates disassembly. , Simple structure and low cost.

The first solenoid valve 4 and the second solenoid valve 5 can also be used as connecting devices, so that the first pipe section 31 and the second pipe section 32 can pass through the first solenoid valve 4 and the second solenoid valve 5 respectively. The replacement of the first pipe section 31 and the second pipe section 32 is realized, and the convenience of the sampling device is improved.

As shown in FIGS. 5 to 6 , the plurality of first functional modules and the plurality of second functional modules are not limited to detection devices and control devices such as the liquid storage tank 107 and the dosing/mixing device 104 .

During use, the first pipe section 31 and the second pipe section 32 are replaced with a plurality of first pipe sections 31 and second pipe sections 32 that match each other to install different functional modules according to different conditions of the site, so as to realize sampling The device can satisfy one or more functions, increase the diversity of the sampling device, improve the use effect of the sampling device, and enhance the user experience.

Further, the second pipe section 32 is provided with an image acquisition device 7, which is arranged on the outer peripheral wall of the outlet end of the second pipe section 32, and is used to obtain the position of the liquid discharge bottle/sampling bottle.

In the present invention, by setting the image collector 7 on the second pipe section 32, it is convenient to obtain the position of the liquid discharge bottle/sampling bottle, improve the precise control of the sampling device during operation, and prevent the second pipe section 32 from being connected to the liquid discharge bottle/sampling during sampling. The bottle is in the wrong position, causing a hazard or contamination.

Further, it also includes a control module, which is respectively connected with the driving device 2 and the image collector 7, and is used to receive the image collector 7 to identify the position of the liquid discharge bottle/sampling bottle, and control the second pipe section 32 to move to the liquid discharge bottle/sample bottle. Above the sampling bottle, rinse/sample.

Preferably, an automatic sampling tray 6 is also included, and the automatic sampling tray 6 has a mark and a place where the liquid discharge bottle/sampling bottle is placed corresponding to the mark, and the image collector 7 identifies the mark and obtains the liquid discharge bottle/ Location of the sampling bottle.

As shown in FIG. 1 to FIG. 2 , the control module is connected with the driving device 2 and the image acquisition device 7 to control the movement of the second pipe section 32 , and set identification marks and sampling bottles/discharge liquids on the automatic sampling tray 6 Where the bottle is placed, the image collector 7 is arranged on the second pipe section 32, so that when the sampling device is in use, the second pipe section 32 is controlled to move by identifying the corresponding mark, so as to ensure that the outlet of the second pipe section 32 is connected to the sampling bottle/ The liquid discharge bottle is opposite, which improves the sampling accuracy of the sampling device, increases the sampling accuracy, and improves the sampling efficiency.

The marks include a first mark 61 and a second mark 62, and the first mark 61 and the second mark 62 correspond to the liquid-discharging bottle placement identification 63 and the sampling bottle placement identification 64, respectively.

As shown in FIG. 3 to FIG. 4 , the present invention also discloses a control method, which includes the following steps:

S1. Receive a sampling instruction;

S2, control the second pipe section of the liquid outlet pipe 3 to move to the preset position of the liquid discharge bottle/sampling bottle;

S3, control the liquid out of the liquid outlet pipe.

After receiving the sampling instruction, the present invention controls the second pipe section 32 of the liquid discharge pipe 3 to move to a preset position for liquid discharge, realizes automatic and intelligent control of the sampling device, and accurately discharges liquid during sampling to prevent mixing. , causing experimental results or causing harm, improving the safety of the sampling device and increasing the sampling accuracy of the sampling device.

Further, the following steps are also included in the S2 step,

S21, controlling the image collector 7 on the second pipe section 32 to obtain the position of the liquid release bottle/sampling bottle;

S22. Control the driving device 2 to drive the second pipe section 32 to move above the opening of the liquid-receiving bottle/sampling bottle.

Further, in the step S3, the following steps are also included:

S31, control the liquid out of the liquid outlet pipe 3;

S32, obtain the liquid discharge time of the liquid discharge pipe 3;

S33. Determine whether the liquid outlet time of the liquid pipe 3 is greater than or equal to the preset time, and if not, continue to perform S31.

In the step S31, the control of the liquid discharge pipe 3 to discharge the liquid is to control the opening of the first solenoid valve 4 and the second solenoid valve 5.

The present invention obtains the position of the liquid discharge bottle/sampling bottle by controlling the image collector 7, then controls the second pipe section 32 to move above the opening of the liquid discharge bottle/sampling bottle, and controls the liquid discharge pipe 3 to discharge liquid, and finally obtains the The liquid outlet time of the liquid pipe 3 is determined to determine whether the liquid outlet time of the liquid pipe 3 is greater than or equal to the preset time. If not, continue to execute S31 to reduce labor intensity, improve the control accuracy of the sampling device, and prevent incomplete sampling from causing pollution or harm .

Specifically, as shown in FIGS. 3 to 4 , the present invention controls the driving device 2 to move to the first mark 61 by identifying the first mark 61 , so that the outlet of the second pipe section 32 is opposite to the opening of the liquid discharge bottle, and then controls The first solenoid valve 4 and the second solenoid valve 5 are opened, the liquid outlet pipe 3 is cleaned, the opening time of the first solenoid valve 4 and the second solenoid valve 5 is detected, and it is determined that the first solenoid valve 4 and the second solenoid valve 5 are opened. Whether the time is greater than or equal to the preset time, when the preset time is reached, it means that the flushing has been completed, control the first solenoid valve 4 and the second solenoid valve 5 to close, and detect the closure of the first solenoid valve 4 and the second solenoid valve 5 again. time, and compare it with the set time parameter, when it is greater than or equal to the preset time, the sampling operation can be performed.

The opening time of the first solenoid valve 4 and the second solenoid valve 5 is 5-15s.

Preferably, the opening time of the first solenoid valve 4 and the second solenoid valve 5 is 10s.

The preset time for the first solenoid valve 4 and the second solenoid valve 5 to be closed is 10-25s.

Preferably, the first solenoid valve 5 and the second solenoid valve 5 are closed for 20s.

Specifically, the sampling device needs to use the liquid to be sampled to flush the liquid outlet pipe 3 before sampling to prevent inaccurate sampling results. Therefore, the flushing time needs to be set during sampling. Because the sample liquid will remain on the liquid outlet pipe 3 after flushing, the flushed pipe section is allowed to stand for a certain period of time to ensure that the retained liquid is completely lowered and the accuracy of sampling is increased.

Specifically, in the present invention, after the flushing of the liquid outlet pipe 3 is completed, the control method of the sampling process is the same as the flushing control method. First, the second mark 62 is identified, and the driving device 2 is controlled to drive the outlet of the second pipe section 32 and the sampling bottle. Open the first solenoid valve 4 and the second solenoid valve 5 for 10s, and then close the first solenoid valve 4 and the second solenoid valve 5 for 20s. When the preset time is reached, the sampling is completed.

Preferably, in the step S33, if yes, stop the liquid discharge, control the driving device to return to the preset original position, and send the sampling completion information.

After the sampling is completed, the drive device 2 is controlled to return to the original position, and a signal of sampling completion is sent to the experimenter, which reduces labor intensity, improves use efficiency, increases the automation and intelligence of the sampling device, and improves experimental efficiency.

The present invention realizes the automation and intelligence of the sampling device by adding the driving device 2 between the first pipe section 31 and the second pipe section 32, and sets a plurality of replaceable first pipe sections 31 and second pipe sections 32, which can be changed according to different site conditions. Need to replace, the structure is simple, convenient and quick, realize the diversification of sampling devices, reduce costs, add a flexible pipe 33 between the first pipe section 31 and the second pipe section 32 to increase the convenience of control, set up an automatic sampling tray 6, and The image collector 7 is arranged on the second pipe section 32 to facilitate the identification of the marks on the automatic sampling tray 3, improve the accuracy of the sampling device, and enhance the user experience.

The control system of the present invention adopts PLC or micro single-computer control.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Without departing from the scope of the technical solution of the present invention, when the technical content indicated above can be used to make some changes or modifications to equivalent examples of equivalent changes, the implementations in the above-mentioned examples can also be further combined or replaced, but any Without departing from the content of the technical solution of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the solution of the present invention.

Claims (10)

1. A multifunctional sampling device, characterized in that: comprising, Sampling valve, including liquid inlet and outlet; The liquid outlet pipe includes a first pipe section and a second pipe section, the inlet of the first pipe section is communicated with the liquid outlet of the sampling valve, and one end of the second pipe section is the liquid outlet of the liquid outlet pipe; A driving device is arranged between the first pipe section and the second pipe section, and is used for driving the second pipe section to move relative to the first pipe section. 2 . The multifunctional sampling device according to claim 1 , wherein one end of the driving device is arranged on the first pipe section, and the other end of the driving device is movably connected with the second pipe section. 3 . ; The driving device includes a support and a connecting rod, the support is fixed on the first pipe section, the connecting rod is movably connected with the support, and the connecting rod is movably connected with the second pipe section; Preferably, an action mechanism is further included for driving the connecting rod to control the movement of the second pipe section. 3 . The multifunctional sampling device according to claim 2 , wherein the liquid outlet pipe further comprises a flexible pipe, which is arranged between the first pipe section and the second pipe section and is used for Bending and stretching under the driving of the second pipe section. 4 . The multifunctional sampling device according to claim 3 , wherein: the first pipe section is provided with a first solenoid valve, and the second pipe section is provided with a second solenoid valve; 4 . The first solenoid valve and the second solenoid valve are used to control the communication or closing of the liquid outlet pipe. 5 . The multifunctional sampling device according to claim 3 , further comprising a plurality of first pipe sections, the plurality of first pipe sections having a plurality of first functional modules, which are replaceably connected to the between the sampling valve and the flexible pipe; A plurality of second pipe sections, the plurality of second pipe sections having a plurality of second functional modules, are replaceably communicated with the outlet of the flexible pipe. 6. The multifunctional sampling device according to any one of claims 1-5, characterized in that: the second pipe section has an image collector, which is arranged on the outer peripheral wall of the second pipe section and is used for acquiring Location of liquid/sampling vials. 7. A multifunctional sampling device according to claim 6, characterized in that: it further comprises a control module, which is connected to the driving device and the image collector respectively, and is used for receiving the image collector to identify the liquid discharge bottle/ The position of the sampling bottle, control the second pipe section to move to the top of the liquid release bottle/sampling bottle for flushing/sampling; Preferably, it also includes an automatic sampling tray, the automatic sampling tray is provided with a mark and a liquid discharge bottle/sampling bottle placement mark corresponding to the mark, the image collector identifies the mark, and obtains the information of the liquid discharge bottle/sampling bottle. Location. 8. A control method for a multifunctional sampling device, characterized in that: based on the multifunctional sampling device according to any one of claims 1-7, comprising the following steps: S1. Receive a sampling instruction; S2, control the second pipe section of the liquid outlet pipe to move to the preset position of the liquid discharge bottle/sampling bottle; S3, control the liquid out of the liquid outlet pipe. 9. The control method according to claim 6, wherein the step S2 further comprises the following steps: S21, controlling the image collector on the second pipe section to obtain the position of the liquid release bottle/sampling bottle; S22 , controlling the driving device to drive the second pipe section to move above the opening of the liquid discharging bottle/sampling bottle. 10. The control method according to claim 8, characterized in that: in the step S3, it further comprises the following steps: S31. Control the liquid discharge from the liquid discharge pipe; S32. Obtain the liquid discharge time of the liquid discharge pipe; S33, determine whether the liquid outlet time of the liquid pipe is greater than or equal to the preset time, and if not, continue to execute S31; Preferably, in the step S33, if yes, stop the liquid discharge, control the driving device to return to the preset original position, and send the sampling completion information.

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