Sampling method and sampling device

Abstract

The invention discloses a sampling method and a sampling device, belongs to the technical field of liquid detection equipment, and is used for improving liquid absorption accuracy and liquid absorption efficiency. According to the main technical scheme, the sampling method comprises the following steps: S101, transferring a sampling bottle to a liquid taking station; s201, the sampling bottle is driven to move downwards by a first stroke, so that the sampling needle is inserted into the sampling bottle; s301, the sampling bottle is driven again to move downwards by a second stroke, so that the sampling bottle is compressed; s401, driving the sampling bottle to move upwards by a second stroke so as to stretch the sampling bottle; s501, the liquid level of the sampling bottle is observed, whether the liquid level reaches the preset height or not is judged, when the liquid level is lower than the preset height, the step S301 and the step S401 are executed repeatedly, and if the liquid level is higher than the preset height, the sampling bottle is driven again to move upwards by the first stroke; s601, the sampling bottle is transferred to a transmission station; and S701, conveying the sampling bottle to a designated position.

Description

Technical Field

[0001] The present application belongs to the technical field of liquid detection equipment, and specifically relates to a sampling method and a sampling device. Background Art

[0002] In many fields of liquid collection and analysis, sampling is a vital basic operation. Traditional sampling methods usually involve using sampling bottles to obtain various types of liquids to be tested. However, the existing technology has many inconveniences and limitations in the sampling process.

[0003] In the traditional sampling process, the sampling bottle often needs to be vacuumed first. This operation is intended to create a negative pressure environment for the subsequent liquid absorption. The vacuum equipment and related operating steps not only increase the complexity of the entire sampling process, but also require additional time costs. More importantly, since vacuuming and liquid absorption are two relatively independent links, this inevitably leads to the need for the sampling needle to be inserted into the sampling bottle twice. If the two insertions are inconsistent, such as differences in insertion position, angle, etc., there may be a risk of vacuum damage. Once the vacuum is destroyed, it will directly affect the negative pressure state in the sampling bottle, resulting in insufficient amount of inhaled liquid, which cannot meet the amount of liquid to be tested required for experiments or production. Moreover, if the vacuum is severely damaged, it may also cause leakage, which not only causes waste of the liquid to be tested, but also may pollute the sampling environment and surrounding equipment. Summary of the invention

[0004] In view of this, the present application provides a sampling method and a sampling device, the main purpose of which is to improve the accuracy and efficiency of liquid aspiration.

[0005] In order to achieve the above objectives, this application mainly provides the following technical solutions: In a first aspect of the present application, a sampling method is provided, comprising: S101: Transfer the sampling bottle to the liquid collection station; S201: driving the sampling bottle to move in a first stroke in a downward direction so that the sampling needle is inserted into the sampling bottle; S301: driving the sampling bottle to move in the downward direction for a second stroke again, thereby compressing the sampling bottle; S401: driving the sampling bottle to move the second stroke in the upward direction, thereby stretching the sampling bottle; S501: Observe the liquid level of the sampling bottle and determine whether the liquid level reaches a preset height. When the liquid level is lower than the preset height, repeat steps S301 and S401. If the liquid level is higher than the preset height, drive the sampling bottle to move the first stroke in the upward direction again. S601: transferring the sampling bottle to a transfer station; S701: transport the sampling bottle to a designated location.

[0006] In a second aspect of the present application, a sampling device is provided, wherein the sampling device adopts the above-mentioned sampling method to perform a sampling operation, and the sampling device comprises: Handling and lifting components; The transport assembly is used to clamp the sampling bottle and transfer the sampling bottle to the liquid collection station, where the sampling needle connected to the feed liquid pipeline is provided; The lifting assembly is arranged opposite to the sampling needle, and is used to clamp the sampling bottle transferred to the liquid collection station and drive the sampling bottle to rise and fall; The sampling bottle is an elastic structure, and the sampling bottle can be compressed and stretched along the height direction of the sampling bottle. When the lifting assembly drives the sampling bottle to descend, the sampling needle is inserted into the sampling bottle, and the gas inside the sampling bottle is discharged through the sampling needle. The sampling bottle is in a compressed state. When the lifting assembly drives the sampling bottle to rise, the sampling bottle is in a stretched state. The sampling bottle is used to absorb the liquid to be tested from the feed liquid pipeline through the sampling needle.

[0007] Optionally, when the lifting assembly drives the sampling bottle to rise and fall, the center of the sampling bottle coincides with the sampling needle.

[0008] Optionally, the sampling bottle comprises a corrugated tube section and a straight tube section, the corrugated tube section is an elastic structure, and the straight tube section is a rigid structure.

[0009] Optionally, the outer diameter of the bellows section is greater than the outer diameter of the straight pipe section, a first boss is provided at one end of the bellows section away from the straight pipe section, and a second boss is provided at one end of the straight pipe section away from the bellows section.

[0010] Optionally, a bottle stopper is provided at the mouth of the sampling bottle, and the bottle stopper is made of elastic material. An annular protrusion structure is provided on the outer peripheral surface of the bottle stopper, and the annular protrusion structure is used to fit with the inner surface of the bottle mouth to seal the sampling bottle.

[0011] Optionally, the bottle stopper includes a first surface and a second surface facing each other, and the first surface and the second surface are recessed toward the interior of the sampling bottle and away from the sampling needle in both a natural state and an assembled state.

[0012] Optionally, the transport component is also used to transfer the sampling bottle carrying the liquid to be tested to the transfer station. The transfer station is provided with a transfer component, and the transfer component is used to receive the sampling bottle transferred to the transfer station and transport the sampling bottle to the designated position.

[0013] Optionally, the sampling device further comprises: Sampling cabinet; The sampling cabinet is used to construct an independent and closed storage space. The handling assembly, the lifting assembly and the transmission assembly are arranged in the storage space, and observation windows are respectively arranged on the cabinet structure of the sampling cabinet at positions relative to the liquid collection station and the transmission station.

[0014] Optionally, the sampling bottle is made of transparent TPU material.

[0015] By means of the above technical solution, the present application has at least the following beneficial effects: The embodiments of the present application provide a sampling method and a sampling device, which generate negative pressure to absorb liquid through the compression and stretching action of the sampling bottle, without the need for additional vacuum equipment, and only insert the sampling needle once, thereby eliminating the problem of insufficient suction of liquid and leakage caused by the destruction of the vacuum of the sampling bottle due to multiple insertions of the sampling needle, ensuring that each sampling can stably obtain a sufficient amount of liquid, thereby improving the accuracy and reliability of experimental or production data. Furthermore, since vacuuming and related complex preparations are omitted, and the sampling operation can be completed quickly and accurately, the sampling time of the liquid to be tested is greatly shortened, which can significantly improve the overall work efficiency, accelerate the experimental process or production process, and make better use of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A flow chart of a sampling method for an optional embodiment of the present application; Figure 2 This is a schematic structural diagram of a sampling device according to an optional embodiment of the present application; Figure 3 This is a schematic diagram of the structure of a sampling bottle of an optional embodiment of the present application; Figure 4 This is a schematic structural diagram of a bottle stopper according to an optional embodiment of the present application; Figure 5 This is a schematic structural diagram of a bottle stopper according to another optional embodiment of the present application.

[0017] The reference numerals are: 1. Sampling bottle; 11. Bellows section; 111. First boss; 12. Straight pipe section; 121. Second boss; 13. Bottle stopper; 131. Annular raised structure; 132. First surface; 133. Second surface; 2. Handling assembly; 3. Lifting assembly; 4. Sampling needle; 5. Liquid pipeline; 6. Liquid collection station; 7. Transfer station; 8. Transfer assembly; 9. Sampling cabinet. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0019] See also Figure 1 As shown, an embodiment of the present application provides a sampling method, comprising: S101: Transfer the sampling bottle 1 to the liquid collection station 6.

[0020] Here, step S101 is the starting operation of the entire sampling process. Through a specific transfer device, such as a robotic arm, a conveyor belt or a track slider, the empty sampling bottle 1 is accurately moved from the initial placement position to the working area for sampling the liquid to be tested, that is, the liquid sampling station 6. The liquid sampling station 6 can be equipped with a corresponding clamping device to ensure that the sampling bottle 1 can remain stable and in a suitable position during subsequent operations, so as to prepare for the subsequent sampling needle 4 to be accurately inserted into the sampling bottle 1.

[0021] S201 : driving the sampling bottle 1 to move in a first stroke in a downward direction, so that the sampling needle 4 is inserted into the sampling bottle 1 .

[0022] Here, when the sampling bottle 1 reaches the liquid collection station 6 and is accurately positioned, the driving device, such as an electric push rod, a cylinder or a screw nut mechanism, is started to move the sampling bottle 1 along a preset downward movement path for a specific first stroke distance. The purpose of the first stroke is to enable the sampling needle 4 to smoothly penetrate the sealing component of the sampling bottle 1, such as a rubber stopper or a bottle cap, and enter the interior of the sampling bottle 1, while ensuring that the sampling needle 4 will not cause excessive damage or interference to the sampling bottle 1 during the insertion process, and can maintain a relatively stable insertion position and angle, so as to facilitate the subsequent suction operation of the liquid to be detected.

[0023] S301: driving the sampling bottle 1 to move downward for a second stroke again, thereby compressing the sampling bottle 1.

[0024] Here, after the sampling needle 4 is successfully inserted into the sampling bottle 1, the driving device is continued to be used to move the sampling bottle 1 further in the downward direction for the second stroke. In this process, since the sampling bottle 1 can be compressed and stretched, and there are structures or devices on the outside of the sampling bottle 1 that limit its excessive deformation, such as fixed clamps, sleeves, etc., the internal space of the sampling bottle 1 will decrease as the bottle body is compressed. This compression action will cause the air in the sampling bottle 1 to be discharged, thereby forming a certain degree of negative pressure environment in the bottle. This negative pressure environment provides a pressure difference power for the subsequent liquid to be detected to be sucked into the sampling bottle 1, and is one of the key steps in this sampling method to replace the traditional vacuum operation.

[0025] S401: driving the sampling bottle 1 to move in the second stroke in the upward direction, thereby stretching the sampling bottle 1.

[0026] Here, after the compression of the sampling bottle 1 is completed, the sampling bottle 1 is immediately driven in the reverse direction to move upward by the second stroke distance that is the same as the previous compression stroke, thereby realizing the stretching operation of the sampling bottle 1. At this time, due to the negative pressure formed in the previous compression process and the elastic recovery force of the sampling bottle 1, the external liquid to be detected will be sucked into the sampling bottle 1 through the sampling needle 4 under the action of the pressure difference. The stretching action helps to further enhance the negative pressure effect, promote the liquid to be detected to flow into the sampling bottle 1 more smoothly, and can make the liquid to be detected in the sampling bottle 1 more evenly distributed, reduce the generation of bubbles, and improve the accuracy and stability of sampling.

[0027] S501: Observe the liquid level of the sampling bottle 1 and determine whether the liquid level reaches a preset height. When the liquid level is lower than the preset height, repeat steps S301 and S401. If the liquid level is higher than the preset height, drive the sampling bottle 1 to move in the upward direction for the first stroke again.

[0028] Here, when the liquid to be detected begins to enter the sampling bottle 1, the liquid level height in the sampling bottle 1 can be monitored in real time by visual inspection or a liquid level sensor, such as an optical liquid level sensor, a capacitive liquid level sensor or an ultrasonic liquid level sensor. The monitored liquid level height is compared with the preset target liquid level height, that is, the preset height. If the liquid level is lower than the preset height, it means that the sampling amount has not yet reached the requirement. At this time, it is necessary to repeat the compression step of S301 and the stretching step of S401, continue to increase the negative pressure in the sampling bottle 1, and inhale more liquid to be detected until the liquid level reaches or exceeds the preset height. When the liquid level is higher than the preset height, it means that enough liquid to be detected has been obtained. At this time, the sampling bottle 1 is driven again to move the first stroke in the upward direction, so that the sampling bottle 1 returns to the relative position when it is not inserted by the sampling needle 4, so that the sampling bottle 1 can be transferred out from the liquid collection station 6 later, and it also avoids the sampling needle 4 from being immersed in the liquid to be detected for a long time under unnecessary circumstances, reducing the risk of contamination and damage.

[0029] S601: Transfer the sampling bottle 1 to the transfer station 7.

[0030] Here, when the sampling bottle 1 completes sampling and the liquid level reaches the requirement, the transfer device, such as a mechanical arm or other transmission mechanism, is started again to move the sampling bottle 1 from the liquid collection station 6 to the transmission station 7. The transmission station 7 can be an intermediate position connecting the subsequent processing area, such as the liquid analysis laboratory to be tested, the liquid storage area to be tested, etc., which is equipped with a corresponding transmission device to ensure the stability and accuracy of the sampling bottle 1 during the transmission process, and prevent the liquid to be tested from leaking or being contaminated due to shaking or collision.

[0031] S701: Transport the sampling bottle 1 to the designated location.

[0032] Here, after the sampling bottle 1 is transferred to the transfer station 7, a series of transmission devices, such as a conveyor belt, a rail system or an automated vehicle, are used to transport the sampling bottle 1 to the final designated location along a predetermined route. The designated location may be the inlet of the liquid analyzer to be tested, a specific location of the liquid storage rack to be tested, or other specific locations related to subsequent operations. The entire transportation process needs to ensure the integrity of the sampling bottle 1 and the safety of the liquid to be tested, so as to avoid affecting the quality of the liquid to be tested and the accuracy of the test results due to unexpected situations during transportation.

[0033] The sampling method provided in the embodiment of the present application generates negative pressure to absorb the liquid to be tested by the compression and stretching action of the sampling bottle 1. No additional vacuum equipment is required. The sampling needle 4 is inserted only once, eliminating the problem of insufficient suction of liquid and leakage caused by the vacuum destruction of the sampling bottle 1 due to multiple insertions of the sampling needle 4, ensuring that each sampling can stably obtain a sufficient amount of liquid, thereby improving the accuracy and reliability of experimental or production data. Furthermore, since vacuuming and related complex preparations are omitted, and the sampling operation can be completed quickly and accurately, the sampling time of the liquid to be tested is greatly shortened, which can significantly improve the overall work efficiency, accelerate the experimental process or production process, and make better use of resources.

[0034] As Figure 1 The specific implementation of the sampling method shown in the figure, the embodiment of the present application also provides a sampling device, see Figure 2 and Figure 3As shown, the sampling device includes: a conveying component 2 and a lifting component 3; the conveying component 2 is used to clamp the sampling bottle 1 and transfer the sampling bottle 1 to the liquid collection station 6, and the liquid collection station 6 is provided with a sampling needle 4 connected to the feed liquid pipeline 5; the lifting component 3 is arranged opposite to the sampling needle 4, and the lifting component 3 is used to clamp the sampling bottle 1 transferred to the liquid collection station 6 and drive the sampling bottle 1 to rise and fall; the sampling bottle 1 is an elastic structure, and the sampling bottle 1 can be compressed and stretched along the height direction of the sampling bottle 1. When the lifting component 3 drives the sampling bottle 1 to descend, the sampling needle 4 is inserted into the sampling bottle 1, and the internal gas of the sampling bottle 1 is discharged through the sampling needle 4, and the sampling bottle 1 is in a compressed state. When the lifting component 3 drives the sampling bottle 1 to rise, the sampling bottle 1 is in a stretched state, and the sampling bottle 1 is used to absorb the liquid to be detected from the feed liquid pipeline 5 through the sampling needle 4.

[0035] In this embodiment, by setting the transport component 2, the sampling bottle 1 can be accurately clamped and transferred to the liquid collection station 6, realizing automated or semi-automated operation, and greatly improving the efficiency and accuracy of the transfer compared to the manual transport of the sampling bottle 1. By setting the lifting component 3 and the sampling needle 4 to be arranged relative to each other, the lifting action of the sampling bottle 1 can be accurately controlled, ensuring that the sampling needle 4 can be accurately inserted into the sampling bottle 1, which is conducive to the stable absorption of the liquid to be detected, and avoiding damage to the sampling bottle 1 or poor insertion position of the sampling needle 4 due to inaccurate operation, which affects subsequent sampling. The sampling bottle 1 is set to an elastic structure, and can be compressed and stretched in the height direction. When the lifting component 3 drives the sampling bottle 1 to descend, the gas inside the sampling bottle 1 is discharged through the sampling needle 4, and a negative pressure environment is formed in the bottle. This method of generating negative pressure by physical means has the advantages of simplicity and efficiency compared to the traditional vacuum equipment to create a negative pressure environment. Traditional vacuum equipment is not only costly and bulky, but also complicated to operate and requires additional maintenance and calibration. The present device utilizes the elasticity of the sampling bottle 1 itself to naturally form and utilize negative pressure during the descent and ascent process, making the structure of the device more compact and more convenient to operate. When the sampling bottle 1 rises, the sampling bottle 1 in a stretched state can further enhance the negative pressure effect, prompting the liquid to be tested to be smoothly sucked from the liquid pipeline 5 into the sampling bottle 1 through the sampling needle 4. This dynamic negative pressure suction method utilizing an elastic structure can better adapt to liquids to be tested of different properties, such as liquids to be tested of different viscosities, and improves the flexibility and reliability of sampling.

[0036] Among them, the transport component 2 is used to clamp the sampling bottle 1 and accurately transfer it from the initial placement position to the liquid collection station 6. The transport component 2 is equivalent to the "transporter" of the entire sampling process, and this function is achieved through a specific mechanical structure and driving method. For example, the transport component 2 may adopt a structure similar to a mechanical gripper, which can be adaptively adjusted according to the shape of the sampling bottle 1, firmly grasp the sampling bottle 1, and prevent it from slipping during the transfer process. Its drive can rely on a mechanical arm, an electric push rod, a cylinder or a motor combined with a transmission device, such as a belt, a chain, a screw, etc. to provide power, so as to accurately deliver the sampling bottle 1 to the liquid collection station 6 according to the preset trajectory and speed.

[0037] Specifically, in this embodiment, the handling assembly 2 includes a mechanical arm and a mechanical gripper, the mechanical gripper is arranged at the execution end of the mechanical arm, and the mechanical arm has at least three degrees of freedom. It can be understood that the at least three degrees of freedom possessed by the mechanical arm give the mechanical arm the ability to move flexibly in three-dimensional space, so that the mechanical gripper can accurately locate and grasp the sampling bottle 1 located in different positions and postures. At least three degrees of freedom can generally include translational movement along the X, Y, and Z axes and rotational movement around some of the axes. Through the combination of these movements, the mechanical arm can accurately grasp the sampling bottle 1 from the storage area or the position of the previous process, and then transfer it to the liquid collection station 6 along a predetermined path, and when placing it, it can ensure that the sampling bottle 1 is in a precise relative position relationship with the clamping device of the liquid collection station 6 and the sampling needle 4, and the error can be controlled within a very small range, providing a highly reliable starting condition for the subsequent sampling operation. As the component that directly contacts and grasps the sampling bottle 1, the shape and size of the mechanical gripper are adapted to the outer contour of the sampling bottle 1, and can evenly apply the grasping force, which not only ensures that the sampling bottle 1 will not slip during the handling process, but also will not be damaged by excessive squeezing. The opening and closing action of the mechanical gripper can be controlled by pneumatic, electric or hydraulic drive modes, and has a certain inductive feedback mechanism, which can monitor the closing state of the gripper and the grasping force of the sampling bottle 1 in real time. Once an abnormal situation occurs, such as excessive or insufficient grasping force, displacement of the sampling bottle 1, etc., the system can promptly issue an alarm and make corresponding adjustments, further improving the safety and stability of the handling process.

[0038] The liquid sampling station 6 is a specific area for subsequent liquid sampling operations, and a sampling needle 4 connected to the liquid pipeline 5 is pre-set on the liquid sampling station 6. The transport component 2 must ensure that the sampling bottle 1 can be accurately placed in a suitable position, so that when the sampling bottle 1 is in place, it can be in a correct relative position relationship with the sampling needle 4, which is convenient for the subsequent lifting component 3 to perform corresponding operations, and then the sampling needle 4 can be smoothly inserted into the sampling bottle 1 to carry out sampling work.

[0039] The lifting assembly 3 is arranged opposite to the sampling needle 4, and the lifting assembly 3 is used to clamp the sampling bottle 1 that has been transferred to the liquid collection station 6 by the transport assembly 2, and drive it to perform lifting and lowering movement in the vertical direction, that is, the height direction of the sampling bottle 1. The clamping function of the lifting assembly 3 can also be achieved by means of a suitable mechanical structure such as a clamping claw, so as to ensure that the sampling bottle 1 can be stably fixed during the lifting process to avoid shaking, deviation, and other situations that affect sampling.

[0040] Specifically, when the lifting assembly 3 drives the sampling bottle 1 to descend, due to the relative position of the sampling bottle 1 and the sampling needle 4, the sampling needle 4 will be accurately inserted into the sampling bottle 1. In this process, because the sampling bottle 1 is an elastic structure, as the descending action continues, the gas originally existing inside the sampling bottle 1 will be discharged into the feed liquid pipeline 5 through the inserted sampling needle 4. The feed liquid pipeline 5 can be connected to the bottom of the tank container storing the liquid to be tested, so that the gas inside the sampling bottle 1 is discharged into the top of the tank container to ensure that the feed liquid pipeline 5 is still full of the liquid to be tested. At this time, the sampling bottle 1 is in a compressed state, its internal space gradually decreases, and the air pressure also decreases accordingly, so that a negative pressure environment is naturally formed inside the sampling bottle 1. When the lifting assembly 3 drives the sampling bottle 1 to rise, relying on the elasticity of the sampling bottle 1 itself, the sampling bottle 1 will recover from the compressed state and enter the stretched state. During the stretching process, due to the negative pressure formed during the previous compression and the suction force generated by the elastic recovery of the sampling bottle 1, the liquid to be tested in the liquid pipeline 5 will be smoothly sucked into the sampling bottle 1 through the sampling needle 4 under the action of the pressure difference. Through such rhythmic lifting and lowering actions, that is, repeated compression and stretching, the liquid can be continuously sucked until the required sampling amount is reached.

[0041] Among them, the sampling bottle 1 can be made of a suitable elastic material (such as a special plastic material, etc.), or some elastic structures are used in the design of the sampling bottle 1, such as a wrinkled, retractable wall, etc., to achieve the compression and stretchability of the sampling bottle 1.

[0042] Among them, a fixed joint is provided at one end of the liquid feed pipeline 5 connected to the sampling needle 4, and the sampling needle 4 passes through the fixed joint and is relatively fixed to the fixed joint. In actual application, when the lifting component 3 drives the sampling bottle 1 to descend, and the sampling needle 4 is inserted into the sampling bottle 1, the sampling bottle 1 can abut against the fixed joint, so that the lifting component 3 can compress the sampling bottle 1 when continuing to drive the sampling bottle 1 to descend.

[0043] Specifically, a guide structure is provided on the side of the fixing joint close to the sampling bottle 1, and the center of the guide structure coincides with the sampling needle 4. When the lifting assembly 3 drives the sampling bottle 1 to descend, the guide structure relies on contact and interaction with the sampling bottle 1 to accurately guide the sampling bottle 1 along a predetermined path to approach the sampling needle 4, thereby ensuring that the bottle mouth of the sampling bottle 1 can be aligned with the sampling needle 4 with extremely high precision, thereby minimizing the risk of poor insertion of the sampling needle 4 or damage to the sampling bottle 1 due to position deviation.

[0044] In some possible implementations disclosed in this application, see Figure 3 As shown, when the lifting assembly 3 drives the sampling bottle 1 to rise and fall, the center of the sampling bottle 1 coincides with the sampling needle 4 .

[0045] In this embodiment, when the center of the sampling bottle 1 coincides with the sampling needle 4, the sampling needle 4 can be vertically and accurately inserted into the center of the sampling bottle 1 during the process of the lifting assembly 3 driving the sampling bottle 1 to rise and fall. Thus, it can be avoided that the sampling bottle 1 is broken or damaged due to improper insertion position, thereby affecting the sealing of the sampling bottle 1 and even causing leakage of the liquid to be detected.

[0046] The center of the sampling bottle 1 is the geometric center of the sampling bottle 1. When the sampling bottle 1 is cylindrical, the center of the sampling bottle 1 is located on the axis of the sampling bottle 1, and the axis of the sampling bottle 1 coincides with the sampling needle 4.

[0047] Specifically, when the lifting assembly 3 drives the sampling bottle 1 to rise and fall, the motion trajectory of the sampling bottle 1 is a straight line along the vertical direction. When the sampling bottle 1 starts to descend under the drive of the lifting assembly 3, the center of the sampling bottle 1 coincides with the sampling needle 4, so that the sampling needle 4 can be inserted into the sampling bottle 1 at the best angle and position. For some sampling bottles 1 with rubber stoppers, the sampling needle 4 needs to accurately penetrate the rubber stopper to enter the bottle. It is understandable that if the center of the rubber stopper and the sampling needle 4 do not coincide, the sampling needle 4 may poke the rubber stopper, resulting in uneven damage to the rubber stopper, affecting its subsequent sealing performance, and may even cause the rubber stopper fragments to fall into the bottle and contaminate the liquid to be detected. In addition, the insertion method with center overlap can make the sampling needle 4 in a position that is conducive to uniform distribution of the liquid after entering the bottle. For example, when sucking liquid, the liquid to be detected can be evenly sucked into the bottle around the sampling needle 4, avoiding the situation where the liquid to be detected is concentrated on one side due to the improper position of the sampling needle 4, causing the flow of the liquid to be detected in the bottle to be turbulent.

[0048] In some possible implementations disclosed in this application, see Figure 3 As shown, the sampling bottle 1 includes a corrugated tube section 11 and a straight tube section 12. The corrugated tube section 11 is an elastic structure, and the straight tube section 12 is a rigid structure.

[0049] In this embodiment, the straight tube section 12 is a rigid structure, which plays a stable supporting role during the sampling process. When the bellows section 11 is compressed and stretched, the straight tube section 12 can prevent the sampling bottle 1 from being excessively deformed or bent as a whole, ensuring the stability of the sampling bottle 1 in the vertical direction. In particular, after the sampling needle 4 is inserted, the rigid straight tube section 12 can keep the relative position of the sampling bottle 1 and the sampling needle 4 stable, avoiding the displacement of the sampling needle 4 due to the shaking or deformation of the sampling bottle 1, thereby ensuring that the liquid to be tested can be smoothly sucked through the sampling needle 4, and maintaining a stable suction environment, reducing the error caused by external interference.

[0050] The bellows section 11 has a pleated shape similar to that of an accordion bellows, so that the bellows section 11 can be compressed and stretched in the vertical direction, that is, in the height direction of the sampling bottle 1. In actual applications, when the lifting assembly 3 drives the sampling bottle 1 to descend, the bellows section 11 will be compressed, the pleats will approach each other, and the volume of the internal space of the sampling bottle 1 will be reduced, so that the air in the sampling bottle 1 will be discharged, thereby forming a certain degree of negative pressure environment in the bottle, providing a pressure difference power for the subsequent liquid to be detected to be sucked into the sampling bottle 1. When the lifting assembly 3 drives the sampling bottle 1 to rise, the bellows section 11 will stretch under the action of its own elastic restoring force, the pleats will unfold, and the volume of the internal space will increase, prompting the liquid to be detected to flow into the sampling bottle 1 through the sampling needle 4.

[0051] The straight pipe section 12 is connected to the corrugated pipe section 11. The straight pipe section 12 is a rigid structure, which can maintain a fixed shape and size during the sampling process and is not prone to elastic deformation.

[0052] Specifically, in actual applications, when the transport component 2 and the lifting component 3 control the movement of the sampling bottle 1, the transport component 2 and the lifting component 3 act on the straight tube section 12 of the sampling bottle 1, thereby driving the overall movement of the sampling bottle 1. It should be noted that the straight tube section 12 provides a stable and reliable fulcrum for the transport component 2 and the lifting component 3, and the rigid structure of the straight tube section 12 makes it difficult to deform or displace when subjected to force, thereby ensuring the accuracy of the movement trajectory of the sampling bottle 1 during the transfer and lifting process. Whether transferring the sampling bottle 1 from the initial position to the liquid collection station 6, or performing lifting operations on the liquid collection station 6 to insert the sampling needle 4, absorb the liquid to be tested, etc., it can be completed with extremely high precision.

[0053] In the above embodiments, see Figure 3 As shown, the outer diameter of the bellows section 11 is greater than the outer diameter of the straight pipe section 12 , a first boss 111 is provided at one end of the bellows section 11 away from the straight pipe section 12 , and a second boss 121 is provided at one end of the straight pipe section 12 away from the bellows section 11 .

[0054] In this embodiment, when the sampling bottle 1 is transported in the conveying pipeline, since the outer diameter of the corrugated tube section 11 is larger than the outer diameter of the straight tube section 12, and the first boss 111 and the second boss 121 are respectively provided at both ends, this structure will form a specific gap between the sampling bottle 1 and the conveying pipeline. During the movement, the outside air can enter these gaps, and under certain speed and pressure conditions, the air will form an air layer similar to an "air cushion" between the sampling bottle 1 and the conveying pipeline, that is, an air bearing, thereby reducing the direct contact and friction between the sampling bottle 1 and the conveying pipeline, making the sampling bottle 1 smoother during the transportation process, which is conducive to extending the service life of the sampling bottle 1 and the conveying pipeline. It should be noted that during the transmission process, some vibrations or impact forces will inevitably be encountered, such as slight shaking of the conveying pipeline or vibrations generated by other equipment. At this time, the air bearing can effectively buffer these external forces and achieve the purpose of shock absorption.

[0055] The delivery pipeline can be a tubular structure for transporting the sampling bottle 1, providing a channel for the sampling bottle 1 to move from one position to another, ensuring that the sampling bottle 1 can flow through the entire sampling system according to a predetermined route. In this embodiment, the delivery pipeline provides a channel for the sampling bottle 1 to move from the transport station 7 to a specified position.

[0056] Among them, the outer diameter of the bellows section 11 is larger than the outer diameter of the straight tube section 12, so that the bellows section 11 can more effectively control the change of the internal gas volume during the compression and stretching process. For example, when the bellows section 11 is compressed, the larger outer diameter helps to discharge the internal gas more quickly to form sufficient negative pressure for sucking the liquid to be tested; and when stretched, it can suck in more liquid to be tested. At the same time, the outer diameter of the bellows section 11 is larger than the outer diameter of the straight tube section 12, so that when the sampling bottle 1 forms an air bearing with the conveying pipeline, it is more conducive to the gathering and bearing of air, providing greater lift, thereby ensuring the stable suspension state of the sampling bottle 1 in the conveying pipeline.

[0057] Specifically, in actual application, when the sampling bottle 1 starts to move in the delivery pipe, air will enter the gap between the sampling bottle 1 and the delivery pipe from the inlet or other gaps of the delivery pipe. The larger outer diameter of the bellows section 11 makes the gap between the bellows section 11 and the delivery pipe relatively larger, which can accommodate more air, while the smaller outer diameter of the straight pipe section 12 limits the flow direction of the air to a certain extent, so that the air can form a stable pressure distribution in this annular gap, which is conducive to the formation of an air bearing.

[0058] Among them, a first boss 111 is provided at one end of the bellows section 11, and the first boss 111 can serve as a reinforcing structure of the bellows section 11 to enhance the strength of the end of the bellows section 11. In practical applications, since the bellows section 11 is elastic, fatigue or deformation is likely to occur at the end during frequent compression and stretching. The first boss 111 can effectively disperse these stresses and protect the integrity of the bellows section 11. At the same time, the flow pattern of air between the sampling bottle 1 and the conveying pipeline is also changed by setting the first boss 111. When air enters the gap between the sampling bottle 1 and the conveying pipeline, the first boss 111 will cause the air to form a certain vortex around the sampling tube, which helps to further stabilize the pressure distribution of the air bearing and improve the load-bearing capacity of the air bearing.

[0059] Among them, a second boss 121 is provided at one end of the straight pipe section 12, and the second boss 121 can be used as a fulcrum for the transport component 2 and the lifting component 3. When the mechanical grippers of the transport component 2 and the lifting component 3 clamp the sampling bottle 1, the second boss 121 can enable the mechanical grippers to grasp the sampling bottle 1 more firmly, preventing the sampling bottle 1 from slipping during movement. At the same time, the second boss 121 will also affect the flow and pressure distribution of the air, and together with the first boss 111, the air forms a more complex but stable flow pattern in the gap between the sampling bottle 1 and the conveying pipeline, thereby enhancing the shock absorption effect of the air bearing.

[0060] In some possible implementations disclosed in this application, see Figure 3 and Figure 4 As shown, a bottle stopper 13 is provided at the bottle mouth of the sampling bottle 1. The bottle stopper 13 is made of elastic material. An annular protrusion structure 131 is provided on the outer peripheral surface of the bottle stopper 13. The annular protrusion structure 131 is used to fit with the inner surface of the bottle mouth to seal the sampling bottle 1.

[0061] In this embodiment, the annular protrusion structure 131 on the outer peripheral surface of the bottle stopper 13 fits tightly with the inner surface of the bottle mouth, which can effectively prevent the liquid to be detected from leaking from the sampling bottle 1. When the bottle stopper 13 is inserted into the bottle mouth, the annular protrusion structure 131 is squeezed by the inner surface of the bottle mouth, thereby elastically deforming, so that the protrusion part of the annular protrusion structure 131 is in closer contact with the inner surface of the bottle mouth, forming a good sealing interface.

[0062] The bottle mouth is the channel through which the inside of the sampling bottle 1 contacts the external environment, and the bottle stopper 13 provided at the bottle mouth is used to prevent the liquid to be tested from flowing out of the bottle, thereby ensuring the integrity of the sample in the sampling bottle 1 during storage and transportation.

[0063] Specifically, the bottle stopper 13 is made of an elastic material, which may be rubber or some elastic plastic, so that the bottle stopper 13 can be elastically deformed when subjected to an external force, and can return to its original shape after the force disappears, thereby achieving a good sealing effect on the bottle mouth.

[0064] Among them, an annular protrusion structure 131 is provided on the outer peripheral surface of the bottle stopper 13. The annular protrusion structure 131 can be a protrusion part surrounding the outer circumference of the bottle stopper 13. Its shape can be semicircular, trapezoidal or other shapes suitable for fitting with the inner surface of the bottle mouth. It can increase the contact area and sealing pressure between the bottle stopper 13 and the inner surface of the bottle mouth. This embodiment is not limited to this.

[0065] Specifically, when the bottle stopper 13 is inserted into the mouth of the sampling bottle 1, the main body of the bottle stopper 13 begins to enter the mouth of the bottle first. Since the bottle stopper 13 is made of elastic material, the bottle stopper 13 can be squeezed and deformed to a certain extent by the mouth of the bottle. As the bottle stopper 13 is continuously inserted, the annular convex structure 131 on the periphery gradually approaches the inner surface of the mouth of the bottle. When the annular convex structure 131 contacts the inner surface of the mouth of the bottle, as the bottle stopper 13 continues to be pushed in, the annular convex structure 131 will be further squeezed by the inner surface of the mouth of the bottle. At this time, the annular convex structure 131 will be elastically deformed according to the shape of the inner surface of the mouth of the bottle, so that its own shape fits closely with the inner surface of the mouth of the bottle, thereby forming a sealed contact surface between the convex part of the annular convex structure 131 and the inner surface of the mouth of the bottle. In the process of the annular convex structure 131 fitting closely with the inner surface of the mouth of the bottle, a certain sealing pressure is generated due to the elastic deformation. This pressure fills the small gap between the bottle stopper 13 and the mouth of the bottle, effectively preventing the passage of liquid and gas. At the same time, since the annular protruding structure 131 surrounds the bottle stopper 13, a uniform sealing effect can be formed in the circumferential direction of the entire bottle mouth.

[0066] In some possible implementations disclosed in this application, see Figure 3 and Figure 5 As shown, the bottle stopper 13 includes a first surface 132 and a second surface 133 facing each other. The first surface 132 and the second surface 133 are recessed toward the inside of the sampling bottle 1 and away from the sampling needle 4 in both the natural state and the assembled state.

[0067] In this embodiment, the first surface 132 and the second surface 133 of the stopper 13 are recessed toward the interior of the sampling bottle 1 to generate a reverse elastic force that prevents the liquid to be detected from flowing out, so that when the sampling needle 4 is inserted into the stopper 13 , the contact between the stopper 13 and the sampling needle 4 is closer, thereby forming an effective sealing area around the sampling needle 4 .

[0068] The first surface 132 of the stopper 13 may be the end surface of the stopper 13 away from one end of the sampling bottle 1 , and the second surface 133 of the stopper 13 may be the end surface of the stopper 13 directly contacting the liquid to be detected in the sampling bottle 1 .

[0069] The first surface 132 and the second surface 133 may both be hemispherical surfaces that are concave toward the interior of the sampling bottle 1 .

[0070] Specifically, the radius of the first surface 132 is smaller than the radius of the second surface 133. In terms of sealing performance, the first surface 132 with a smaller radius can provide a more concentrated sealing pressure when in contact with the sampling needle 4. When the sampling needle 4 is inserted into the bottle stopper 13, the hemispherical surface of the first surface 132 will quickly undergo elastic deformation, and its smaller radius makes the deformation area relatively smaller and easier to fit closely to the outer periphery of the sampling needle 4, so that an extremely tight seal can be formed around the sampling needle 4, effectively preventing the liquid to be detected from seeping out from the contact point between the sampling needle 4 and the bottle stopper 13. The larger radius of the second surface 133 can provide a more stable and large-area support when in contact with the liquid to be detected in the bottle. When the liquid to be detected in the bottle is affected by external factors such as shaking, vibration, etc., the larger area of ​​the second surface 133 can evenly disperse the pressure of the liquid to be detected, further enhancing the sealing effect on the liquid to be detected, and cooperating with the first surface 132 to ensure that the entire bottle stopper 13 can maintain good sealing in different directions. In addition, in terms of the protection and adaptability of the sampling needle 4, the small radius of the first surface 132 helps to reduce the resistance and wear when the sampling needle 4 is inserted. Because its contact area is relatively small, the friction force to which the sampling needle 4 is subjected during the insertion process is more evenly distributed, and it is not easy for the surface of the sampling needle 4 to be scratched or damaged due to excessive local friction. At the same time, it also enables the bottle stopper 13 to better adapt to sampling needles 4 of different diameters. Since the radius of the first surface 132 is small, when facing a thinner or thicker sampling needle 4, its elastic deformation range is relatively large, and it can more flexibly adjust its own shape to tightly wrap the sampling needle 4, thereby improving the versatility of the bottle stopper 13 in different sampling scenarios.

[0071] In some possible implementations disclosed in this application, see Figure 1 As shown, the transport component 2 is also used to transfer the sampling bottle 1 carrying the liquid to be tested to the transfer station 7. The transfer station 7 is provided with a transfer component 8, which is used to receive the sampling bottle 1 transferred to the transfer station 7 and transport the sampling bottle 1 to a designated location.

[0072] In this embodiment, the sampling bottle 1 containing the liquid to be tested is transferred to the transfer station 7 by the transport component 2, making the entire sampling to testing process more automated and efficient, and avoiding the inefficiency and error problems that may occur when manually transporting the sampling bottle 1 between different stations.

[0073] Among them, the transmission station 7 is a transition area, and the transmission station 7 plays the role of a bridge between the handling component 2 and the transmission component 8. Here, the handling component 2 completes its own transfer task, and the transmission component 8 begins to take over the transportation of the sampling bottle 1.

[0074] Specifically, the transmission component 8 includes a transceiver and a conveying pipeline. In practical applications, after the sampling bottle 1 is placed in the transmission station 7 by the handling component 2, the transceiver receives the sampling bottle 1 at the transmission station 7, and then transports the received sampling bottle 1 to a designated location through the conveying pipeline.

[0075] In some possible implementations disclosed in this application, see Figure 1 As shown, the sampling device also includes: a sampling cabinet 9; the sampling cabinet 9 is used to construct an independent and closed accommodating space, the handling component 2, the lifting component 3 and the transmission component 8 are arranged in the accommodating space, and observation windows are respectively arranged on the cabinet structure of the sampling cabinet 9 at the positions relative to the liquid collection station 6 and the transmission station 7.

[0076] In this embodiment, the independent and closed storage space constructed by the sampling cabinet 9 can prevent external dust, impurities and other pollutants from entering, avoiding contamination of the sampling bottle 1 and the liquid to be tested. At the same time, it can also prevent the internal radioactive substances from spreading to the external environment, reducing potential harm to the surrounding environment and personnel.

[0077] The sampling cabinet 9 has a cabinet structure, and an independent and closed storage space is constructed by enclosing four walls, a top plate and a floor of the cabinet.

[0078] Specifically, observation windows are provided on the cabinet structure of the sampling cabinet 9 and at positions relative to the liquid collection station 6 and the transmission station 7. At the liquid collection station 6, the sampling bottle 1 and the sampling needle 4 cooperate with each other to complete the operation of absorbing the liquid to be detected, and by providing an observation window at the corresponding position of the liquid collection station 6, the operator standing outside the sampling cabinet 9 can clearly see whether the sampling bottle 1 has accurately reached the liquid collection station 6, whether the process of the sampling needle 4 inserting into the sampling bottle 1 is smooth, and whether there are any abnormalities when the liquid to be detected is absorbed. Similarly, the observation window at the transmission station 7 facilitates the operator to observe the handover of the sampling bottle 1 between the handling component 2 and the transmission component 8, such as whether the sampling bottle 1 is accurately placed on the transmission component 8, whether the transmission component 8 is stable when starting to receive and transport, etc.

[0079] In some possible embodiments disclosed in the present application, the sampling bottle 1 is made of transparent TPU material.

[0080] In this embodiment, the transparent TPU material makes the liquid level of the liquid to be detected inside the sampling bottle 1 clearly visible. During the sampling process, the operator can directly observe the rise and fall of the liquid level with the naked eye, so as to accurately control the sampling amount. In addition, the state of the liquid to be detected, such as color changes, whether there is precipitation or suspended matter, etc., can also be seen at a glance, which helps to promptly discover abnormal conditions of the liquid to be detected.

[0081] Among them, TPU material is thermoplastic polyurethane elastomer rubber with good transparency.

[0082] Specifically, the bellows section 11 and the straight section 12 of the sampling bottle 1 are both made of thermoplastic polyurethane elastomer rubber. In this embodiment, the wall thickness of the straight section 12 is greater than that of the bellows section 11, which is conducive to maintaining the rigidity of the straight section 12 and the elasticity of the bellows section 11.

[0083] The above disclosure only discloses several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by technicians in this field should fall within the scope of protection of the present application.

Claims

1. A sampling method, characterized in that: include: S101: Transferring the sampling bottle (1) to a liquid collection station (6); S201: driving the sampling bottle (1) to move in a first stroke in a downward direction, so that the sampling needle (4) is inserted into the sampling bottle (1); S301: driving the sampling bottle (1) again to move in the downward direction for a second stroke, thereby compressing the sampling bottle (1); S401: driving the sampling bottle (1) to move the second stroke in the upward direction, thereby stretching the sampling bottle (1); S501: Observe the liquid level of the sampling bottle (1) and determine whether the liquid level reaches a preset height. When the liquid level is lower than the preset height, repeat steps S301 and S401. If the liquid level is higher than the preset height, drive the sampling bottle (1) to move in the upward direction for the first stroke again. S601: transferring the sampling bottle (1) to a transfer station (7); S701: transport the sampling bottle (1) to a designated location.

2. A sampling device, characterized in that: The sampling device adopts the sampling method according to claim 1 to perform sampling operation, and the sampling device comprises: A handling assembly (2) and a lifting assembly (3); The transport assembly (2) is used to clamp the sampling bottle (1) and transfer the sampling bottle (1) to the liquid collection station (6), and the liquid collection station (6) is provided with the sampling needle (4) connected to the liquid pipeline (5); The lifting component (3) is arranged opposite to the sampling needle (4), and the lifting component (3) is used to clamp the sampling bottle (1) transferred to the liquid collection station (6) and drive the sampling bottle (1) to rise and fall; The sampling bottle (1) is an elastic structure. The sampling bottle (1) can be compressed and stretched along the height direction of the sampling bottle (1). When the lifting component (3) drives the sampling bottle (1) to descend, the sampling needle (4) is inserted into the sampling bottle (1), and the gas inside the sampling bottle (1) is discharged through the sampling needle (4). The sampling bottle (1) is in a compressed state. When the lifting component (3) drives the sampling bottle (1) to ascend, the sampling bottle (1) is in a stretched state. The sampling bottle (1) is used to absorb the liquid to be detected from the liquid pipeline (5) through the sampling needle (4).

3. The sampling device according to claim 2, characterized in that: When the lifting component (3) drives the sampling bottle (1) to rise and fall, the center of the sampling bottle (1) coincides with the sampling needle (4).

4. The sampling device according to claim 2, characterized in that: The sampling bottle (1) comprises a corrugated tube section (11) and a straight tube section (12); the corrugated tube section (11) is an elastic structure, and the straight tube section (12) is a rigid structure.

5. The sampling device according to claim 4, characterized in that: The outer diameter of the bellows section (11) is greater than the outer diameter of the straight pipe section (12); a first boss (111) is provided at one end of the bellows section (11) away from the straight pipe section (12); and a second boss (121) is provided at one end of the straight pipe section (12) away from the bellows section (11).

6. The sampling device according to claim 2, characterized in that: A bottle stopper (13) is provided at the mouth of the sampling bottle (1); the bottle stopper (13) is made of an elastic material; an annular protrusion structure (131) is provided on the outer peripheral surface of the bottle stopper (13); the annular protrusion structure (131) is used to fit with the inner surface of the bottle mouth to seal the sampling bottle (1).

7. The sampling device according to claim 6, characterized in that: The bottle stopper (13) comprises a first surface (132) and a second surface (133) facing each other, and the first surface (132) and the second surface (133) are both recessed toward the interior of the sampling bottle (1) and away from the sampling needle (4) in a natural state and an assembled state.

8. The sampling device according to claim 2, characterized in that: The transport component (2) is also used to transfer the sampling bottle (1) carrying the liquid to be detected to the transfer station (7). The transfer station (7) is provided with a transfer component (8). The transfer component (8) is used to receive the sampling bottle (1) transferred to the transfer station (7) and transport the sampling bottle (1) to the designated location.

9. The sampling device according to claim 8, characterized in that: Also includes: Sampling cabinet (9); The sampling cabinet (9) is used to construct an independent and closed storage space, the handling component (2), the lifting component (3) and the transmission component (8) are arranged in the storage space, and observation windows are respectively arranged on the cabinet structure of the sampling cabinet (9) at positions relative to the liquid collection station (6) and the transmission station (7).

10. The sampling device according to claim 2, characterized in that: The sampling bottle (1) is made of transparent TPU material.

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