A self-priming liquid sampling bottle and a sampling method

Abstract

The present invention discloses a self-priming liquid sampling bottle and a sampling method, belonging to the technical field of sampling devices, including a bottle stopper and a light-transmitting bottle body. The bottle body of the bottle includes a straight tube section and a corrugated section. The corrugated section has elasticity and can generate deformation to adjust the negative pressure condition in the inner cavity of the bottle. At least two annular flanges are arranged at intervals on the outer wall of the bottle body. When air flows through the area between the bottle body and the conveying pipeline, an air vortex is formed in the area between several annular flanges. In the present invention, the light-transmitting bottle body facilitates real-time monitoring of the liquid level of the liquid in the sampling bottle, enabling more accurate control of the sampling volume and timely adjustment. The corrugated section of the bottle body has elasticity and can be compressed and stretched, capable of establishing a negative pressure state in the sampling bottle by squeezing the corrugated section, avoiding leakage points in the bottle stopper, and also playing a shock-absorbing role. When air enters the area between the two annular flanges, an air vortex is generated to form a circumferential air film layer, reducing the contact friction between the sampling bottle and the conveying pipeline, and improving stability and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, and particularly to a self-priming liquid sampling bottle and a sampling method. Background Art

[0002] In radioactive environment workshops such as fuel reprocessing plants and nuclear power plants, a large number of liquid sampling and control operations are involved. Sampling and analyzing these liquids is an important means to judge the operation status of the project, monitor the process and the composition and properties of the feed liquid, and ensure operation safety. The liquids in radioactive environment workshops have characteristics such as high complexity, high radiation, high corrosion, and high toxicity, and the storage containers are generally in an inaccessible sealed environment. Usually, only indirect sampling methods can be adopted. At present, the main means of sampling and sending samples of liquids in a strong ionization radiation environment in China is a pneumatic sending system. This system uses a sampling bottle to suck the liquid sample to be detected, and then transports it to different areas through pipelines to achieve sampling and sending of the liquid to be detected.

[0003] The currently used special sampling bottles have the following several problems: (1) The light transmittance of the bottle body is poor, and it is difficult to observe the liquid level in the bottle when sucking the liquid. It is impossible to judge whether the sampling volume is appropriate. The sampling success rate is invisible and uncontrollable, belonging to a blind operation, and the success rate is difficult to control; (2) When in use, it is necessary to pierce the sealing gasket in advance to perform vacuum treatment on the sampling bottle. After establishing the vacuum inside the sampling bottle, it relies on negative pressure to suck the liquid. The same device cannot complete vacuum creation and liquid suction. The transfer from the vacuum creation device to the liquid suction device depends on the transport pipeline. During sampling, a secondary needle puncture is required, and the operation is cumbersome, further damaging the sealing performance of the sampling bottle; (3) During the long-distance pipeline transportation process, the sampling bottle collides with the pipeline, which will cause different degrees of damage to the sealing performance of the sampling bottle during transportation, affect the vacuum degree in the sampling bottle, resulting in too low a sampling volume or even sampling failure, it is difficult to accurately master the sampling volume, or the sampled liquid leaks from the needle hole at the sealing structure, causing radioactive contamination to equipment such as pipelines and commutators. In the long-term state, it will inevitably affect the sensitive components such as sensors installed on it, affecting the accuracy and stability of system operation; (4) At the same time, the currently adopted sealing method of screwing with a sealing gasket may also become loose due to frequent rotational collisions with the pipeline, resulting in a decrease in the sealing effect of the sampling bottle, and may also cause radioactive feed liquid leakage and pollution.

[0004] During the sampling and sending process of the current sampling bottle, it is difficult to ensure sampling accuracy and movement stability, the process is complex, and it may cause radioactive liquid leakage, increasing the operation cost and maintenance cost, affecting the stable operation of the process and the economy of the factory. The present invention proposes a new solution to the above problems. Summary of the Invention

[0005] In order to overcome at least one of the above-mentioned drawbacks, the present invention provides a self-priming liquid sampling bottle and a sampling method. The object of the present invention can be achieved by adopting the following technical solutions:

[0006] In a first aspect of the present invention, there is provided a self-priming liquid sampling bottle for use in a radioactive environment, the self-priming liquid sampling bottle comprising:

[0007] A bottle body, the bottle body being made of a light-transmitting material, the bottle body comprising a bottle bottom, a bottle body and a bottle mouth, the bottle body comprising a connected straight tube section and a corrugated section, the corrugated section being elastic and capable of deforming to adjust the negative pressure condition in the inner cavity of the bottle body;

[0008] A bottle stopper, the bottle stopper being elastic, at least a part of the bottle stopper being embedded in the bottle mouth to form a seal;

[0009] Wherein, annular flanges are provided at both ends of the bottle body and between the straight tube section and the corrugated section, the annular flanges protruding from the straight tube section and the corrugated section, and an air vortex can be formed in the area between the plurality of annular flanges when air flows through between the bottle body and the conveying pipeline.

[0010] In an implementable manner, the bottle body is made of a thermoplastic polyurethane elastomer modified composite material, and the bottle body is an integrally formed structure.

[0011] In an implementable manner, the straight tube section is connected to the bottle bottom, and one end of the corrugated section is connected to the straight tube section;

[0012] The other end of the corrugated section is connected to the bottle mouth, or the other end of the corrugated section is connected to the bottle mouth through another straight tube section.

[0013] In an implementable manner, the outer diameters of the annular flanges are the same for contacting with the conveying pipeline.

[0014] In an implementable manner, the corrugated section comprises a plurality of wave peaks and wave valleys arranged in sequence, and an air vortex can be formed at the position of the wave valleys when air flows through between the bottle body and the conveying pipeline.

[0015] In an implementable manner, annular flanges are provided at one end of the straight tube section away from the corrugated section, one end of the corrugated section away from the straight tube section, and between the straight tube section and the corrugated section, and the outer diameter of the corrugated section is larger than the outer diameter of the straight tube section, and an air vortex can be formed at the position of the straight tube section when air flows through between the bottle body and the conveying pipeline.

[0016] In an implementable manner, a marking portion is provided on the outer wall of the bottle body, and the marking portion can be used for operations such as spraying words, coding, and marking.

[0017] In one implementable manner, the bottle stopper includes:

[0018] a bottle stopper body for being embedded into the bottle mouth;

[0019] a first sealing flange provided at one end of the bottle stopper body and protruding circumferentially from the bottle stopper body for contacting the end face of the bottle mouth to form a seal;

[0020] a second sealing flange provided at the other end of the bottle stopper body and protruding circumferentially from the bottle stopper body for contacting the stop groove in the bottle mouth to form a seal.

[0021] In one implementable manner, the shape of the second sealing flange is adapted to the shape of the stop groove,

[0022] the stop groove in the bottle mouth includes a plane, and the contact surface between the second sealing flange and the stop groove in the bottle mouth is a plane; or,

[0023] the stop groove in the bottle mouth includes an inclined plane, and one end of the stop groove close to the axis of the bottle body inclines towards the side close to the bottle bottom, and the contact surface between the second sealing flange and the stop groove in the bottle mouth is an inclined plane; or,

[0024] the stop groove in the bottle mouth includes a concave arc surface, and the contact surface between the second sealing flange and the stop groove in the bottle mouth is an arc surface.

[0025] In one implementable manner, a groove is provided at the middle position of the exposed end face of the bottle stopper for reducing the thickness that the bottle stopper needs to be punctured through; and / or,

[0026] a convex portion is provided on the inner side wall of the bottle mouth, and the convex portion presses a part of the bottle stopper located in the bottle mouth for forming a stop on the movement of the bottle stopper along the axial direction of the bottle body.

[0027] In the second aspect of the present invention, a sampling method is provided, which is applied to the self-priming liquid sampling bottle described in any item of the first aspect. The steps of the sampling method include:

[0028] Squeezing the bottle body to fold the corrugated section to discharge part of the air in the inner cavity of the bottle body, assembling the bottle body and the bottle stopper for sealing to form a complete sampling bottle, and a negative pressure is formed in the inner cavity of the sampling bottle;

[0029] The sampling bottle is pneumatically conveyed to the sampling station through a conveying pipeline, the sampling needle pierces into the bottle stopper and enters the cavity, and the liquid sample in the material tank is sucked into the sampling bottle through the negative pressure by the sampling needle;

[0030] Judge whether the sampling volume reaches the preset volume according to the liquid level in the observation sampling bottle. When the liquid level is lower than the preset height, the manipulator drives the sampling bottle to move downward repeatedly to fold the corrugated section and discharge part of the air in the inner cavity of the sampling bottle. Then, the liquid sample in the trough is sucked into the sampling bottle through the sampling needle again by negative pressure until the liquid level reaches the preset height;

[0031] The manipulator drives the sampling bottle to move upward to separate from the sampling needle, and the sampling bottle is pneumatically transported to the next area through the conveying pipeline.

[0032] The beneficial technical effects of the present invention: According to the present disclosure, the self-priming liquid sampling bottle is made of a light-transmitting material, which facilitates real-time monitoring of whether the liquid level of the liquid in the sampling bottle reaches the preset height. Repeated sampling can ensure that the sampling volume of the sampling bottle meets the standard. By directly observing the liquid level, the sampling volume can be more accurately controlled, and timely adjustment can be made to ensure that the sampling volume meets the preset standard, avoiding the situation of too little sampling volume or sampling failure, and improving accuracy and safety; The bottle body includes a straight barrel section and a corrugated section. The corrugated section is elastic and can be compressed and stretched, which is convenient for adjusting the negative pressure in the inner cavity of the bottle. The negative pressure state in the sampling bottle can be established by squeezing the corrugated section, without damaging the bottle plug structure by acupuncture, avoiding leakage points in the bottle plug. The elastic structure of the corrugated pipe section plays a good shock-absorbing role during transportation, improving the stability of the transportation process; A circular flange is provided on the bottle body. By precisely controlling the circumferential gap between the circular flange and the conveying pipeline, it is avoided that the bottle plug and the corrugated section directly contact the conveying pipeline and cause wear, improving the transportation stability. When the air flow enters between the two circular flanges during the pneumatic transportation process, an air vortex will be generated, forming a circumferential air film layer between the corrugated section and the straight barrel section, applying force to the sampling bottle to push the sampling bottle to move, reducing the contact friction between the sampling bottle and the conveying pipeline, reducing the vibration of the sampling bottle during transportation, improving stability and safety, and further ensuring the sealing performance of the sampling bottle. Description of the Drawings

[0033] In the drawings, the following contents are given by way of example and not limitation:

[0034] Figure 1 Shows the overall structural schematic diagram at an angle;

[0035] Figure 2 Shows the overall structural schematic diagram at another angle;

[0036] Figure 3 Shows the overall structural sectional view;

[0037] Figure 4 Shows the schematic diagram of the air flow direction of the sampling bottle in the conveying pipeline;

[0038] Figure 5 Shows the structural sectional view of the bottle mouth and the bottle plug;

[0039] Figure 6 Shows a structural cross-sectional view of the bottle stopper;

[0040] Figure 7 Shows an enlarged schematic structural view of the bottle mouth and the bottle stopper;

[0041] Figure 8 Shows a schematic structural view of a rabbet;

[0042] Figure 9 Shows a schematic structural view of another rabbet;

[0043] Figure 10 Shows a schematic structural view of yet another rabbet;

[0044] Figure 11 Shows a schematic structural view of the bottle body and the bottle stopper at an angle;

[0045] Figure 12 Shows a schematic structural view of the sampling bottle during the sampling process.

[0046] In the figure:

[0047] 1. Bottle body; 2. Bottle stopper;

[0048] 11. Straight cylinder section; 12. Corrugated section; 13. Bottle mouth; 14. Annular flange; 21. Bottle stopper body; 22. First sealing flange; 23. Second sealing flange; 24. Groove;

[0049] 131. Protrusion; 132. Rabbet. Detailed implementation mode

[0050] In the following detailed disclosure, reference is made to the accompanying drawings and these embodiments are fully described. To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the following described implementation manners are not limited thereto. The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0051] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection 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 according to specific circumstances.

[0052] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0053] The first aspect of the present invention, as Figures 1 - 11 As shown, a self-priming liquid sampling bottle is provided, which is applied to radioactive environment. The self-priming liquid sampling bottle comprises a bottle body 1 and a bottle stopper 2. The bottle body 1 is made of light-transmitting material. The bottle body 1 comprises a bottle bottom, a bottle body and a bottle mouth 13. The bottle body comprises a straight section 11 and a corrugated section 12 connected to each other. The corrugated section 12 is elastic and can produce deformation to adjust the negative pressure of the inner chamber of the bottle body 1; the bottle stopper 2 is elastic, and at least a part of the bottle stopper 2 is embedded in the bottle mouth 13 to form a seal; annular flanges 14 are provided at both ends of the bottle body and between the straight section 11 and the corrugated section 12. The annular flange 14 protrudes from the straight section 11 and the corrugated section 12. When the airflow passes through between the bottle body 1 and the conveying pipeline, air vortices can be formed in the area between the several annular flanges 14.

[0054] The self-priming liquid sampling bottle provided in this embodiment facilitates real-time monitoring of whether the liquid level in the sampling bottle reaches a preset height through the bottle body 1 made of translucent material. The operator can observe the liquid level changes during the sampling process in real time. When the sampling amount does not meet the standard, the sampling can be repeated. The sampling amount can be controlled more accurately and can be adjusted in time to ensure that the sampling amount meets the preset standard, avoiding the situation where the sampling amount is too small or the sampling fails, thereby improving the sampling efficiency, accuracy and safety. Preset height lines of different milliliters can also be marked on the sampling bottle to further improve the convenience of observation.

[0055] The self-priming liquid sampling bottle provided in this embodiment, the bottle body 1 includes a bottle bottom, a bottle body and a bottle mouth 13. The bottle body includes a straight tube section 11 and a corrugated section 12. The corrugated section 12 has elasticity and can be compressed and stretched, which is convenient for adjusting the negative pressure condition in the inner cavity of the bottle body 1. The negative pressure state in the sampling bottle can be established by squeezing the corrugated section 12, without the need to puncture and damage the structure of the bottle stopper 2, avoiding leakage points in the bottle stopper 2; the straight tube section 11 ensures the rigidity and stability of the bottle body 1, and the straight tube section 11 provides a smooth surface, which is beneficial to the smooth flow of the liquid material. The corrugated section 12 increases the elasticity of the bottle body 1. During pneumatic conveying, the corrugated section 12 is a corrugated tubular structure with a relatively thin wall thickness. The good elastic structure of the corrugated section 12 enables the sampling bottle to absorb and disperse these forces through the deformation of the corrugated section 12 when subjected to external forces or vibrations, playing a buffering role, which helps to reduce the impact of vibrations on the conveying system and plays a good shock-absorbing role. At the same time, it can also prevent the destruction of the sealing performance between the bottle stopper 2 and the bottle body 1 caused by vibrations, ensuring the sealing effect; during pneumatic conveying, the liquid material may be damaged or undergo adverse changes due to vibrations. The shock-absorbing effect of the corrugated section 12 can reduce the impact of such vibrations on the material, thereby protecting the integrity and quality of the material, and can also reduce the wear of the sampling bottle and the conveying pipeline caused by vibrations, extend the service life of the sampling bottle and the conveying pipeline, reduce the maintenance cost, and improve the stability and reliability of the conveying process.

[0056] The self-priming liquid sampling bottle provided in this embodiment, by providing a number of annular flanges 14 on the bottle body, avoids direct contact and wear between the bottle stopper 2 and the corrugated section 12 and the conveying pipeline, reducing the wear on the straight tube section 11, the corrugated section 12 and the bottle stopper 2. When the bottle body 1 moves at high speed in the pipeline, the annular flanges 14 provide sufficient anti-impact and anti-friction capabilities, avoiding the shedding of debris and obvious frictional debris, causing movement obstacles inside the pipeline, and improving the stability and anti-friction performance of the overall structure of the sampling bottle, and improving the service life of the sampling bottle; by contacting the annular flanges 14 with the conveying pipeline, the direct contact area with the pipe wall of the conveying pipeline can be reduced, reducing the friction between the sampling bottle and the pipe wall, reducing wear and resistance, and helping to improve the conveying efficiency; by precisely controlling the circumferential gap between the outer diameter of the annular flanges 14 and the inner diameter of the conveying pipeline, when the sampling bottle moves in the pipeline, the sampling bottle can be well positioned through the annular flanges 14, ensuring that the sampling bottle maintains a predetermined position and attitude in the pneumatic conveying pipeline, avoiding unnecessary rotation or tilting, reducing vibrations and offsets, and preventing the sampling bottle from getting stuck or blocking the pipeline during conveying, enabling the sampling bottle to be transported smoothly in the pneumatic transmission pipeline, improving the conveying stability, reliability and safety.

[0057] The self-priming liquid sampling bottle provided in this embodiment helps to form a specific airflow pattern by arranging at least three annular flanges 14 at intervals. The three annular flanges 14 are respectively located at both ends of the bottle body, between the corrugated section 12 and the straight cylinder section 11. When the airflow enters the annular flange 14, due to the existence of the annular flange 14, the airflow path is changed, generating an air vortex on the outer peripheral sides of the straight cylinder section 11 and the corrugated section 12. This vortex effect helps to enhance the disturbance of the airflow, thereby improving the suspension effect of the sampling bottle during transportation; due to the action of the air vortex, a circumferential air film layer is formed between the corrugated section 12 and the straight cylinder section 11, applying the aerodynamic air bearing to the sampling bottle. The air film layer plays a lubricating and protective role, reducing the direct contact and friction between the body and the conveying pipeline, thereby extending the service life of the equipment; the sampling bottle is pushed to move by the air vortex, reducing the contact friction between the sampling bottle and the conveying pipeline, reducing the vibration of the sampling bottle during transportation, improving the efficiency of the pneumatic conveying system, enhancing the stability and safety, and further ensuring the sealing performance of the sampling bottle. The structural innovation of this self-priming liquid sampling bottle establishes a principle structure, ensuring the application of the advanced aerodynamic principle of the air bearing on the sampling bottle.

[0058] In an implementable manner, the bottle body 1 is made of a thermoplastic polyurethane elastomer modified composite material, and the bottle body 1 is an integrally formed structure.

[0059] Among them, the material of the bottle body 1 is a thermoplastic polyurethane elastomer modified composite material, which has characteristics such as corrosion resistance, radiation resistance, semi-transparency, wear resistance and impact resistance, and good fluidity of the material in the molten state. The entire sampling bottle is integrally processed by injection molding. It has a complete structure and excellent stability, and can ensure that after the bottle body 1 is soaked in 90% concentrated nitric acid for 40 hours, the elasticity of the corrugated pipe is still good and there is basically no corrosion phenomenon on the bottle body 1. The thermoplastic polyurethane elastomer modified composite material itself has good elasticity and wear resistance, which enables the sampling bottle to better adapt to the changes and friction of the conveying pipeline during pneumatic transportation and maintain a stable movement state. The corrugated section 12 can further provide a buffering effect, reducing the impact of vibration on the bottle body.

[0060] Among them, the bottle body 1 is in a semi-transparent state, enabling the operator to conveniently observe the state and liquid level of the material inside the bottle, improving the observation effect of the internal sampling liquid, increasing the work efficiency, and at the same time reducing the risk of the liquid being exposed to the external environment; at the same time, during pneumatic transportation, the semi-transparent bottle body allows real-time monitoring of the flow of the material, helping to promptly detect and handle any potential problems, such as blockage or leakage.

[0061] In an implementable manner, as Figure 1 and Figure 3 shown, the straight cylinder section 11 is connected to the bottom of the bottle, and one end of the corrugated section 12 is connected to the straight cylinder section 11.

[0062] It can be understood that due to the elastic characteristics of the thermoplastic polyurethane elastomer modified composite material, in order to ensure the rigidity requirement of the overall structure of the sampling bottle during transportation, the straight section 11 is a straight tubular structure with a relatively thick wall thickness. The straight section 11 ensures the rigidity and stability of the bottle body 1. At the same time, through the length design of the straight section 11, when the sampling bottle reaches the sampling station to suck liquid, the corrugated section 12 compresses, and the needle tip of the sampling needle just approaches the bottom of the sampling bottle without contacting the bottom of the sampling bottle. This design enables the sampling bottle to achieve the maximum liquid suction volume; the corrugated section 12 is a corrugated tubular structure with a relatively thin wall thickness, and the corrugated section 12 plays the role of adjusting negative pressure and elastic buffering.

[0063] During specific implementation, the sampling bottle is driven to the sampling station for sampling by clamping the bottom of the bottle with a manipulator. To ensure the structural rigidity of the clamping position, the straight section 11 is connected to the bottom of the bottle, and the rigidity of the lower half of the sampling bottle can meet the clamping and transportation requirements.

[0064] It can be understood that the structure, shape, and size of the bottle body 1 can be designed according to actual needs, including but not limited to data such as length, width, diameter, and wall thickness, as long as it can meet the sampling and transportation requirements.

[0065] Among them, as Figure 1 and Figure 3 shown, the other end of the corrugated section 12 can be connected to the bottle mouth 13, that is, the bottle body 1 is a structure of bottle bottom - straight section 11 - corrugated section 12 - bottle mouth 13. The bottle bottom, straight section 11, and bottle mouth 13 have excellent rigidity. The corrugated section 12 is arranged between the straight section 11 and the bottle mouth 13, ensuring the stability of the overall structure of the bottle body 1.

[0066] It can be understood that the inner wall of the straight section 11 is a smooth surface, which is beneficial to the smooth flow of the liquid material, while the inner wall of the corrugated section 12 is a corrugated surface, providing additional friction and resistance during the flow of the liquid material, helping to slow down the flow rate near the position of the bottle mouth 13. The slowdown of the flow rate helps to reduce the impact and splashing caused by rapid flow, playing a buffering role, thus protecting the integrity of the liquid material and the stability of the internal structure of the sampling bottle. The design of the corrugated section 12 realizes the blocking effect on the flow of the liquid material towards the bottle mouth 13. By adjusting the shape and distribution of the corrugations, flow resistance points can be formed at specific positions, thereby guiding the liquid material to form a stable flow pattern before reaching the bottle mouth 13, helping to prevent the liquid material from overflowing or splashing due to too fast flow during sampling, and improving the sealing and safety of the sampling bottle during transportation.

[0067] One end of the corrugated section 12 can be connected to the bottle mouth 13 through another straight tube section 11. That is, the bottle body 1 has a structure of bottle bottom - straight tube section 11 - corrugated section 12 - straight tube section 11 - bottle mouth 13. The bottle bottom, the straight tube section 11, and the bottle mouth 13 have excellent rigidity. By arranging the corrugated section 12 between the two straight tube sections 11, the stability of the overall structure of the bottle body 1 is ensured.

[0068] It can be understood that the inner walls of the two straight tube sections 11 are smooth surfaces, which is beneficial to the smooth flow of the liquid material. The inner wall of the middle corrugated section 12 is a corrugated surface. The unique uneven structure of the corrugated section 12 provides additional friction and resistance during the flow of the liquid material, effectively slowing down the flow rate of the liquid material. The corrugated section 12 can reduce the fluctuation and impact of the liquid material when the liquid material is subjected to external forces, such as the airflow change in pneumatic conveying or the turning change of the conveying pipeline, protecting the structure of the bottle body 1 from excessive stress, maintaining the uniformity and consistency of the liquid material, and at the same time, the corrugated section 12 can guide the flow direction of the liquid material, making it flow more orderly in the bottle body 1, helping to reduce the formation of eddy currents and turbulence, and improving the controllability of the liquid material in the sampling bottle during the conveying process. Through the alternating design of the straight tube section 11 and the corrugated section 12, the bottle body 1 can provide the necessary buffering effect while ensuring the smooth flow of the liquid material, ensuring the stability and safety of the liquid material in the sampling bottle during pneumatic conveying.

[0069] In an implementable embodiment, as Figure 3 shown, the outer diameters of the annular flanges 14 are the same for contacting the conveying pipeline.

[0070] Among them, the annular flange 14 is arranged on the outer wall of the bottle body, and the axis of the annular flange 14 coincides with the axis of the bottle body 1. The outer diameters of the annular flanges 14 are the same, and can form uniform contact with the inner wall of the conveying pipeline.

[0071] Among them, the annular flange 14 is arranged on the outer wall of the bottle body. The annular flange 14 increases the wall thickness, making the rigidity of both ends of the bottle body stronger, and improving the structural stability and service life of the bottle body 1.

[0072] Among them, the same outer diameters of the annular flanges 14 are helpful for contacting the conveying pipeline, forming radial limitation on the bottle body 1, ensuring that the bottle body 1 maintains a stable position and direction during pneumatic conveying, preventing vibration and deviation caused by airflow change or other external forces. Due to the limiting effect of the annular flange 14, the vibration of the bottle body 1 during conveying is reduced, which is beneficial to protecting the bottle body 1 and the liquid material inside it from damage, and can also ensure the smoothness and reliability of the conveying. By reducing vibration and deviation, the energy consumed in overcoming vibration and deviation is reduced, so that more energy can be used to push the bottle body 1 forward, improving the overall efficiency of the pneumatic conveying system.

[0073] Among them, a number of annular flanges 14 arranged at intervals on the bottle body form supports at both ends and in the middle of the bottle body, preventing the bottle body from collapsing and deforming, and improving the stability of the structure of the bottle body 1. Especially at the bend of the conveying pipeline, the maximum outer surface of the corrugated section 12 will not come into contact with the inner wall of the pipeline, ensuring that the corrugated section will not be damaged due to friction with the inner wall of the pipe during continuous, long-distance, and high-speed movement; it also achieves the effect of a necking structure, providing a specific path for the flow of air during pneumatic conveying. When the air flow enters the space between the two annular flanges 14, the air flow changes direction to form an air vortex, and the air flow generates a rotational effect within the space between the two annular flanges 14. A circumferential air film layer is formed on the outer peripheral side of the bottle body between the two annular flanges 14, that is, a circumferential air film layer is formed on the outer peripheral sides of both the straight section 11 and the corrugated section 12. The sampling bottle is supported by the air film, which helps to suspend the bottle body 1 at the central position of the conveying pipeline through the air vortex. When the sampling bottle deviates from the central axis of the conveying pipeline, the air film will automatically adjust the air pressure to make the sampling bottle return to the central position again, achieving radial positioning by using the gas dynamic pressure, reducing the contact with the inner wall of the conveying pipeline, enabling the sampling bottle to pass through the conveying pipeline more quickly, improving the efficiency and safety of conveying. The same outer diameter of the annular flanges 14 ensures that the air flow can maintain a uniform flow rate and direction when passing through the annular flanges 14, without generating turbulence due to changes in the shape or size of the annular flanges 14, reducing the energy loss of the air flow, and helping to maintain the stable state of the bottle body 1 during the conveying process.

[0074] Among them, as Figure 4 shown, the corrugated section 12 includes a number of wave crests and wave troughs arranged in sequence, and an air vortex can be formed at the wave trough position when the air flow passes through the space between the bottle body 1 and the conveying pipeline. When the air flow passes through the space between the bottle body 1 and the conveying pipeline, affected by the structure of the corrugated section 12, the path of the air flow will change. The flow rate of the air flow increases in the narrow channel at the wave crest position, and the air flow pressure decreases. The pressure received in front of the wave crest is much higher than the pressure received behind, and thus an air vortex is formed at the wave trough position, which helps to reduce the friction between the air flow and the bottle body 1 and improve the conveying efficiency.

[0075] Among them, as Figure 4 shown, annular flanges 14 are provided at one end of the straight section 11 away from the corrugated section 12, one end of the corrugated section 12 away from the straight section 11, and between the straight section 11 and the corrugated section 12. The outer diameter of the corrugated section 12 is larger than the outer diameter of the straight section 11, and an air vortex can be formed at the position of the straight section 11 when the air flow passes through the space between the bottle body 1 and the conveying pipeline.

[0076] It is understandable that annular flanges 14 are provided at both ends of the bottle body. One annular flange 14 is located near the bottle mouth 13, and the other annular flange 14 is located near the bottle bottom and fits with the jaws of the manipulator of the pneumatic sampling device, enabling stable clamping by the manipulator and allowing compression and tensile sampling operations; the outer diameter of the straight cylinder section 11 is smaller than that of the corrugated section 12, and the outer diameter of the straight cylinder section 11 is smaller than that of the annular flange 14. By providing an annular flange 14 between the straight cylinder section 11 and the corrugated section 12, a necking structure is formed for the straight cylinder section 11, causing air vortices to form at both the straight cylinder section 11 position and the corrugated section 12 position of the air flow, reducing the direct contact between the air flow and the bottle body 1, reducing friction and resistance, and improving the conveying efficiency.

[0077] In an implementable embodiment, a marking portion is provided on the outer wall of the bottle body 1, and the marking portion can be used for operations such as spraying words, coding, and marking.

[0078] Among them, a marking portion is provided on the outer wall of the bottle body 1. After the straight cylinder section 11 is processed by a precision injection molding process, it can be written with polyurethane ink. In actual use, operations such as spraying words, coding, and marking can be performed on the bottle body 1. For example, the outer wall of the straight cylinder section 11 can be polished to increase the surface roughness to facilitate improving the convenience of marking.

[0079] Traditional sampling bottles use threaded connections, and a flexible bottle stopper 2 is provided on the bottle cap. However, threaded connections are prone to loosening or even falling off due to vibration and collision during transportation, resulting in damage to the sealing performance inside the sampling bottle. Before sampling, it may cause insufficient negative pressure and insufficient sampling volume or even sampling failure, and after sampling, it may cause leakage of the liquid material and pollution to the conveying pipeline.

[0080] In an implementable embodiment, as Figures 5 - 11 shown, the bottle stopper 2 includes a bottle stopper main body 21, a first sealing flange 22, and a second sealing flange 23. The bottle stopper main body 21 is used to be embedded into the bottle mouth 13. The first sealing flange 22 is provided at one end of the bottle stopper main body 21 and protrudes circumferentially from the bottle stopper main body 21 for contacting the end face of the bottle mouth 13 to form a seal. The second sealing flange 23 is provided at the other end of the bottle stopper main body 21 and protrudes circumferentially from the bottle stopper main body 21 for contacting the stop 132 inside the bottle mouth 13 to form a seal.

[0081] It is understandable that the bottle stopper 2 is elastic and can be embedded at the bottle mouth 13 and fit tightly against the wall of the bottle mouth 13 to form a seal, preventing the vacuum degree inside the sampling bottle from being damaged and preventing the liquid material inside the sampling bottle from leaking.

[0082] Among them, as Figure 6 and Figure 7As shown, the first sealing flange 22 at one end of the stopper body 21 has a larger thickness, which is convenient for contacting the end face of the bottle mouth 13. The second sealing flange 23 at the other end of the stopper body 21 has a smaller thickness, which is convenient for passing through the bottle mouth 13 and contacting the stop 132 inside the bottle mouth 13.

[0083] Among them, the stopper body 21 constitutes the basic structure of the stopper 2, having certain elasticity and toughness to meet the sealing requirements under different conditions. When the stopper 2 is assembled with the bottle body 1, the stopper body 21 and the second sealing flange 23 are embedded inside the bottle mouth 13. The outer diameter of the second sealing flange 23 is larger than that of the stopper body 21. The second sealing flange 23 is in close contact with the stop 132 inside the bottle mouth 13 to form the first sealing line of defense, preventing the liquid in the bottle body 1 from entering between the stopper body 21 and the inner wall of the bottle mouth 13; the stopper body 21 is of a columnar structure and its outer wall is in close contact with the inner wall of the bottle mouth 13 to form the second sealing line of defense; the outer diameter of the first sealing flange 22 is larger than that of the stopper body 21. The first sealing flange 22 is in close contact with the end face of the bottle mouth 13 to form the third sealing line of defense, preventing the liquid in the bottle body 1 from leaking outside the sampling bottle. Through multiple guarantees, the stopper 2 ensures the purity of the liquid and the sealing integrity of the sampling bottle.

[0084] It can be understood that the outer diameters of both the first sealing flange 22 and the second sealing flange 23 are larger than that of the stopper body 21. By covering the contact surfaces between the stopper body 21 and the inner wall of the bottle mouth 13 with the two sealing flanges respectively, redundant sealing protection is provided, greatly reducing the risk of liquid leakage or contamination. At the same time, it also reduces the influence of external factors on the liquid in the bottle, such as vibration, temperature change or pressure fluctuation. The stopper 2 is not easily displaced or detached from the bottle mouth 13, enhancing the stability of the sampling bottle during transportation.

[0085] In an implementable manner, as Figures 7 - 10 shown, the shape of the second sealing flange 23 is adapted to the shape of the stop 132.

[0086] It can be understood that the stopper body 21 is in close contact with the inner wall of the bottle mouth 13 to prevent the liquid in the bottle from leaking or external impurities from entering. The second sealing flange 23 is in close contact with the stop 132 inside the bottle mouth 13, which can block the contact surface between the stopper body 21 and the inner wall of the bottle mouth 13. The shape of the second sealing flange 23 is adapted to the shape of the stop 132 to ensure that they can be closely fitted, further enhancing the sealing effect. Through the close cooperation between the second sealing flange 23 and the stop 132, the stop 132 can form a stop in the moving direction of the stopper 2 away from the bottle body 1, making the stopper 2 more firmly fixed on the bottle mouth 13 and not easily falling off. During transportation or detection, leakage or accidental opening can be effectively prevented.

[0087] Among them, as Figure 6 and Figure 7As shown, the stopper 132 inside the bottle mouth 13 includes a flat surface, and the contact surface between the second sealing flange 23 and the stopper 132 inside the bottle mouth 13 is a flat surface.

[0088] Among them, as Figure 8 shown, the stopper 132 inside the bottle mouth 13 includes an inclined surface, and one end of the stopper 132 close to the axis of the bottle body inclines towards the side close to the bottom of the bottle. The contact surface between the second sealing flange 23 and the stopper 132 inside the bottle mouth 13 is an inclined surface; or,

[0089] Among them, as Figure 9 and Figure 10 shown, the stopper 132 inside the bottle mouth 13 includes a concave arc surface, and the contact surface between the second sealing flange 23 and the stopper 132 inside the bottle mouth 13 is an arc surface.

[0090] It can be understood that the stopper 132 is a structure extending inwards inside the bottle mouth 13, used to interact with the second sealing flange 23 to enhance the seal and prevent the bottle stopper 2 from falling off. The shape of the stopper 132 can be diverse, such as a flat surface, an inclined surface or an arc surface. The shape of the stopper 132 can be selected according to specific application requirements and the design of the bottle. The shape of the bottle stopper 2 is adapted to the stopper 132 to ensure the best sealing performance and ease of use. By designing the stopper 132 into different shapes, it requires greater force to separate the bottle stopper 2 from the bottle mouth 13, improving the stability of the structure of the bottle stopper 2 and the bottle mouth 13.

[0091] In an implementable embodiment, as Figure 6 , Figure 11 and Figure 12 shown, a groove 24 is provided at the middle position of the exposed end face of the bottle stopper 2, used to reduce the thickness that the bottle stopper 2 needs to be punctured through by the sampling needle.

[0092] Among them, by opening the groove 24 on the exposed end face of the bottle stopper 2, that is, the groove 24 is opened on the end face of the first sealing flange 22, the thickness of the bottle stopper 2 that the sampling needle needs to puncture through is reduced, reducing the difficulty and required force of the puncture, and reducing the risk of accidental breakage or fragmentation of the bottle stopper 2 caused by excessive force, thus further ensuring the integrity and safety of the contents inside the bottle; at the same time, the groove 24 serves as an obvious marking point, which helps to align more accurately during puncture, improving the accuracy and efficiency of the operation; by reducing the thickness of the puncture point, it helps to reduce the debris or particles that may be generated during the puncture process of the bottle stopper 2, and can further protect the liquid in the bottle from being contaminated.

[0093] In an implementable embodiment, as Figure 6 and Figure 7 shown, the inner end face of the bottle stopper 2 is a convex diversion surface, used to divert the liquid in the sampling bottle, reducing the impact of the flowing liquid on the bottle stopper 2.

[0094] Among them, the end face inside the bottle stopper 2 is a convex diversion surface, that is, the end face of the second sealing flange 23 bulges outward. The diversion surface can include an inclined surface or an arc surface. The axial distance between the center position of the diversion surface and the bottom of the bottle is less than the axial distance between the outer edge of the diversion surface and the bottom of the bottle, that is, the center position of the diversion surface bulges into the bottle. When the liquid material flows towards the bottle stopper 2, the convex diversion surface will cause the liquid material to flow along different paths, thereby dispersing the impact force. By changing the contact angle and flow path of the liquid material during flow, the direct impact force of the liquid material on the bottle stopper 2 is reduced, avoiding the detachment of the bottle stopper 2 during transportation, helping to protect the bottle stopper 2 from wear and damage during long-term use, and extending the service life of the bottle stopper 2; the diversion surface can also increase the stability of the liquid material flow, divert the liquid material, make the distribution of the liquid material in the bottle more uniform, and reduce the formation of turbulence and vortices, thus being beneficial to maintaining the smoothness of the flow.

[0095] In an implementable embodiment, as Figure 7 and Figure 8 shown, a convex portion 131 is provided on the inner side wall of the bottle mouth 13. The convex portion 131 presses a part of the bottle stopper 2 located inside the bottle mouth 13 to form a stop for the movement of the bottle stopper 2 along the axial direction of the bottle body 1.

[0096] Among them, a radially extending convex portion 131 is provided on the inner side wall of the bottle mouth 13. The elastic bottle stopper 2 can deform when being squeezed and return to its original state after the pressure is released. When the bottle stopper 2 is inserted into the bottle mouth 13, the convex portion 131 on the inner wall of the bottle mouth 13 will exert a squeezing effect on the bottle stopper 2, so that the bottle stopper 2 is restricted in the radial direction and thus difficult to fall off. Due to the squeezing of the convex portion 131, the contact area between the bottle stopper 2 and the inner wall of the bottle mouth 13 increases, thereby increasing the friction force between the two, helping to prevent the bottle stopper 2 from accidentally falling off when subjected to external forces. The structure is simple and the cost is low. Without additional fasteners or seals, an effective anti-detachment effect can be achieved only through the structures of the bottle mouth 13 and the bottle stopper 2, which can effectively prevent leakage and pollution and improve the safety of the transportation process.

[0097] In the second aspect of the present invention, as Figures 1 - 12As shown, a sampling method is provided, which is applied to the self-priming liquid sampling bottle of any item in the first aspect. The steps of the sampling method include: squeezing the bottle body 1 to fold the corrugated section 12 to discharge part of the air in the inner cavity of the bottle body 1, assembling the bottle body 1 and the bottle stopper 2 for sealing to form a complete sampling bottle, and a negative pressure is formed in the inner cavity of the sampling bottle; the sampling bottle is pneumatically conveyed to the sampling station through a conveying pipeline, the sampling needle pierces into the bottle stopper 2 and enters the cavity, and the liquid sample in the material tank is sucked into the sampling bottle through the negative pressure via the sampling needle; judging whether the sampling amount reaches the preset amount according to the observed liquid level in the sampling bottle. When the liquid level is lower than the preset height, the manipulator drives the sampling bottle to move downward repeatedly to fold the corrugated section 12 to discharge part of the air in the inner cavity of the sampling bottle, and the liquid sample in the material tank is sucked into the sampling bottle through the sampling needle again through the negative pressure until the liquid level reaches the preset height; the manipulator drives the sampling bottle to move upward to separate from the sampling needle, and the sampling bottle is pneumatically conveyed to the next area through the conveying pipeline.

[0098] It can be understood that in the preparation stage before sampling, by squeezing the bottle body 1, the corrugated section 12 is folded to discharge part of the air in the inner cavity of the bottle body 1, and the bottle body 1 and the bottle stopper 2 are assembled to ensure sealing, forming a complete sampling bottle. At this time, a negative pressure environment is formed in the inner cavity of the sampling bottle. In the transportation and sampling stage, the sampling bottle is pneumatically conveyed to the sampling station through the conveying pipeline. The mechanical claw holds the annular flange 14 at the bottom of the bottle and moves the sampling bottle upside down to the sampling station. The bottle stopper 2 is aligned with the sampling needle and lowered until the sampling needle pierces into the bottle stopper 2 and enters the cavity, and the liquid in the material tank is sucked into the sampling bottle through the sampling needle by using the negative pressure principle. In the sampling amount judgment and adjustment stage, by observing the liquid level in the sampling bottle, it is judged whether the sampling amount reaches the preset amount. If the liquid level is lower than the preset height, the manipulator is started to drive the sampling bottle to move downward, so that the corrugated section 12 is folded again to discharge part of the air in the inner cavity of the sampling bottle. By repeating the above steps, the liquid sample in the material tank can be sucked into the sampling bottle again through the negative pressure until the liquid level reaches the preset height. In the completion of sampling and transportation stage, the manipulator drives the sampling bottle to move upward and separate from the sampling needle. The sampled sampling bottle is pneumatically conveyed to the next area through the conveying pipeline for subsequent processing or analysis.

[0099] The sampling method provided in this embodiment is applied to the self-priming liquid sampling bottle in any one of the first aspects. It can establish a negative pressure environment through the shape change of the sampling bottle itself, without the need to evacuate the air by puncturing the bottle stopper 2, avoiding damage to the structure of the bottle stopper 2 before sampling and ensuring the stability of the negative pressure environment inside the sampling bottle. After the first sampling, a negative pressure environment can be established again by squeezing the bottle body 1 for re-sampling until the sampling volume reaches the standard to complete the sampling operation. The bottle stopper 2 after sampling is only punctured once, with a low degree of damage to the structure and is not prone to leakage. Through the above sampling method, the sealing performance between the bottle body 1 and the bottle stopper 2 can be ensured to maintain the negative pressure environment inside the sampling bottle. During the sampling process, closely observe the liquid level change and adjust the sampling volume in a timely manner to ensure the accuracy and reliability of the sampling bottle during use, improve the efficiency and success rate of sampling, and improve the efficiency and safety during the transportation process.

[0100] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0101] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0102] In view of the above detailed description, these and other changes can be made to these embodiments. This written description discloses the present invention including the best mode of the embodiments. The patent scope obtained by the present invention is defined by the claims, and the claims are not limited by the present disclosure. The protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and concept of the present invention, makes equivalent replacements or changes, and all are within the protection scope of the present invention.

Claims

1. A self-priming liquid sampling bottle, characterized in that: Used in radioactive environments, the self-priming liquid sampling bottle includes: A bottle body (1), the bottle body (1) is made of a light-transmitting material, the bottle body (1) comprises a bottle bottom, a bottle body and a bottle mouth (13), the bottle body comprises a straight section (11) and a corrugated section (12) connected to each other, the corrugated section (12) is elastic and can produce deformation for adjusting the negative pressure of the inner chamber of the bottle body (1), and is used for actively inhaling radioactive liquid; during pneumatic transportation, the elastic structure of the corrugated section (12) plays a shock-absorbing role to reduce the impact of the transportation pipeline on the bottle body (1); The bottle stopper (2) is elastic and can be penetrated by a sampling needle to actively suck the liquid into the sampling bottle. The sampling bottle is driven by a manipulator to repeatedly fold the corrugated section (12) to discharge part of the air in the sampling bottle, and the liquid is sucked into the sampling bottle again by negative pressure. At least a part of the bottle stopper (2) is embedded in the bottle mouth (13) to form a seal. Parts of the bottle stopper (2) located at both ends of the bottle mouth (13) protrude in the circumferential direction to form a sealing flange for contacting the end surface of the bottle mouth (13) to form a seal. Wherein, annular flanges (14) are provided at both ends of the bottle body and between the straight section (11) and the corrugated section (12); the annular flanges (14) protrude from the straight section (11) and the corrugated section (12); the outer diameters of the annular flanges (14) are the same and are used to contact the conveying pipe; when the airflow passes between the bottle body (1) and the conveying pipe, an air vortex can be formed in the area between the plurality of annular flanges (14); the corrugated section (12) includes a plurality of wave crests and wave troughs arranged in sequence; when the airflow passes between the bottle body (1) and the conveying pipe, an air vortex can be formed at the wave trough position; The inner wall of the corrugated section (12) is a corrugated surface, which is used to provide friction and resistance when the liquid flows, thereby slowing down the flow rate of the liquid near the bottle mouth (13). The bottle stopper (2) includes a raised diversion surface, which is used to divert the liquid and reduce the impact on the bottle stopper (2).

2. The self-priming liquid sampling bottle according to claim 1, characterized in that: The bottle body (1) is made of a thermoplastic polyurethane elastomer modified composite material, and the bottle body (1) is an integrally formed structure.

3. The self-priming liquid sampling bottle according to claim 2, characterized in that: The straight tube section (11) is connected to the bottle bottom, and one end of the corrugated section (12) is connected to the straight tube section (11); The other end of the corrugated section (12) is connected to the bottle mouth (13), or the other end of the corrugated section (12) is connected to the bottle mouth (13) via another straight tube section (11).

4. The self-priming liquid sampling bottle according to claim 1, characterized in that: An annular flange (14) is provided at one end of the straight section (11) away from the corrugated section (12), at one end of the corrugated section (12) away from the straight section (11), and between the straight section (11) and the corrugated section (12); the outer diameter of the corrugated section (12) is greater than the outer diameter of the straight section (11); and when the airflow passes through between the bottle body (1) and the conveying pipe, an air vortex can be formed at the position of the straight section (11).

5. The self-priming liquid sampling bottle according to claim 1 or 2, characterized in that: The outer wall of the bottle body (1) is provided with a marking portion, and the marking portion can be used for spraying characters, coding, and marking operations.

6. The self-priming liquid sampling bottle according to claim 1, characterized in that: The bottle stopper (2) comprises: A bottle stopper body (21), the bottle stopper body (21) being used to be embedded in the bottle mouth (13); a first sealing flange (22), the first sealing flange (22) being arranged at one end of the bottle stopper body (21) and protruding from the bottle stopper body (21) in the circumferential direction and being used for contacting with the end surface of the bottle mouth (13) to form a seal; A second sealing flange (23), the second sealing flange (23) is arranged at the other end of the bottle stopper body (21) and protrudes from the bottle stopper body (21) in the circumferential direction for contacting with the stopper (132) in the bottle mouth (13) to form a seal.

7. The self-priming liquid sampling bottle according to claim 6, characterized in that: The shape of the second sealing flange (23) matches the shape of the stopper (132). The stopper (132) in the bottle mouth (13) comprises a plane, and the contact surface between the second sealing flange (23) and the stopper (132) in the bottle mouth (13) is a plane; or, The stopper (132) in the bottle mouth (13) comprises an inclined surface, and an end of the stopper (132) close to the axis of the bottle body is inclined toward a side close to the bottle bottom, and a contact surface between the second sealing flange (23) and the stopper (132) in the bottle mouth (13) is an inclined surface; or, The stopper (132) in the bottle mouth (13) comprises a concave arc surface, and the contact surface between the second sealing flange (23) and the stopper (132) in the bottle mouth (13) is a arc surface.

8. A sampling method, characterized in that: The self-priming liquid sampling bottle according to any one of claims 1 to 7, wherein the steps of the sampling method include: The bottle body (1) is squeezed to cause the corrugated section (12) to fold and discharge part of the air in the inner chamber of the bottle body (1); the bottle body (1) and the bottle stopper (2) are assembled and sealed to form a complete sampling bottle, and a negative pressure is formed in the inner chamber of the sampling bottle; The sampling bottle is pneumatically transported to the sampling station through the conveying pipeline, and the sampling needle pierces the bottle stopper (2) into the chamber, and the liquid sample in the material tank is sucked into the sampling bottle through the sampling needle by negative pressure; By observing the liquid level in the sampling bottle, it is determined whether the sampling volume has reached a preset volume. When the liquid level is lower than a preset height, the manipulator drives the sampling bottle to move downward repeatedly multiple times so that the corrugated section (12) is folded to discharge part of the air in the chamber of the sampling bottle, and the liquid sample in the material tank is sucked into the sampling bottle through the sampling needle again by negative pressure until the liquid level reaches a preset height. The robot drives the sampling bottle to move upward and away from the sampling needle, and the sampling bottle is pneumatically transported to the next area through the conveying pipeline.

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