Liquid sampler

Abstract

The utility model discloses a liquid sampler, relates to the technical field of liquid sampling equipment, and adopts the technical scheme that the liquid sampler comprises a plurality of sampling sub-barrels which are connected in series up and down through internal and external screws, the top of the uppermost first section of sampling sub-barrel is connected with a top cover, and a rope tying ring is arranged in the center of the top of the top cover; a rope with scales is connected to the rope tying ring; outer connecting threads are arranged on the outer walls of the tops of the sampling sub-barrels, inner connecting threads are arranged on the inner walls of the bottoms of the sampling sub-barrels, and the adjacent sampling sub-barrels are connected through thread matching of the inner connecting threads and the outer connecting threads; and each sampling sub-barrel is provided with an independent sample inlet pipe and an exhaust pipe. The sampler disclosed by the utility model has the beneficial effects that the sampler is simple to manufacture, easy to assemble and disassemble, convenient to operate, time-saving and labor-saving, can realize continuous sampling at different depths, is not limited by the number of sampling points, can effectively eliminate air in a container in the sampling process, and ensures the accuracy of the sampling depth and sufficient sampling amount.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid sampling equipment, in particular to a liquid sampler. Background Art

[0002] As an important part of product quality control and environmental monitoring, liquid sampling technology has a long development history and is closely related to multiple disciplines. From the initial simple manual sampling to modern automated sampling equipment, liquid sampling technology has undergone significant evolution. Early sampling methods relied on manual operation, which was not only inefficient but also difficult to ensure sampling accuracy and repeatability. With the progress of industrial automation and precision manufacturing technology, liquid samplers have gradually developed towards automation and intelligence, enabling more accurate and efficient sampling operations. However, despite continuous technological progress, liquid samplers still face some challenges in practical applications, especially the sampling requirements under multi-depth conditions.

[0003] Currently, there are some technical limitations in liquid samplers on the market. First of all, most existing samplers are designed for single-point or limited multi-point sampling, making it difficult to meet the complex sampling requirements of multi-depth. For example, the sampler described in the patent with the publication number CN220170638U can achieve continuous sampling from three points at a time. If the number of sampling points increases, its structure needs to be changed, which not only increases the complexity of operation but also raises the cost.

[0004] Secondly, there are defects in the existing technology for dealing with the problem of air discharge in the container. It is difficult for the existing technology to discharge the air entering the container. The pressure difference generated by the air can block the liquid from entering the sampler, resulting in a limited amount of liquid entering the container.

[0005] In addition, there are also deficiencies in the existing samplers in determining the sampling position depth. Most devices can only provide a rough estimate and lack accuracy, which is particularly prominent in scientific research and industrial applications that require precise control of the sampling depth.

[0006] These deficiencies in the existing technology directly lead to low efficiency and high cost in the sampling process, and also limit the application of samplers in a wider range of fields. For example, in environmental monitoring, it is necessary to continuously sample at different depths in rivers, reservoirs, etc. to obtain more comprehensive water quality data, and the existing technology is difficult to meet this requirement. Sampling from storage tanks of food and chemical products, precise control of the sampling depth is important for ensuring product quality, but the existing technology often cannot provide sufficient accuracy. The existence of these problems highlights the urgent need for new liquid sampler technology.

[0007] This solution aims to solve the technical problems of existing liquid samplers in continuous sampling at multiple depths, air discharge, and precise control of sampling depth. Specifically, the problems to be solved by this solution include: how to design a sampler that can adapt to different depths and environmental conditions to achieve continuous and multi-point precise sampling; how to effectively discharge the air in the container during the sampling process to ensure that a sufficient amount of sample can smoothly enter the container; and how to improve the measurement accuracy of the sampling depth to meet the high standards required in scientific research and industrial applications. Solving these problems is of great significance for improving the efficiency, accuracy, and application scope of liquid sampling. Summary of the Utility Model

[0008] To achieve the above-mentioned utility model purpose and address the above technical problems, the present utility model provides a liquid sampler.

[0009] The technical solution is as follows: It includes a plurality of sampling sub-buckets. The plurality of sampling sub-buckets are connected in series up and down through internal and external screws. The top of the uppermost first sampling sub-bucket is connected with a top cover. A lanyard loop is arranged at the center position of the top of the top cover, and a rope is connected to the lanyard loop. The rope passes through the lanyard loop and is tied in a knot.

[0010] External threads are provided on the outer walls of the tops of the sampling sub-buckets, and internal threads are provided on the inner walls of the bottoms. The adjacent sampling sub-buckets are connected through the matching of the internal threads and the external threads.

[0011] In this solution, the corresponding number of sampling sub-buckets can be connected according to the number of sampling points without replacing the entire sampling system. Users do not need to invest a large amount of cost at one time to purchase too many sampling devices. They can increase or decrease the number of sampling sub-buckets according to the number of sampling points, thereby reducing the initial investment cost.

[0012] Each sampling sub-bucket is provided with an independent sampling inlet pipe and an exhaust pipe. A micro solenoid valve is connected to the sampling inlet pipe, and a filter screen can be set at the outer end of the micro solenoid valve as needed. A micro vacuum pump is connected to the exhaust pipe. Both the micro solenoid valve and the micro vacuum pump are electrically connected to an external controller.

[0013] The sampling inlet pipe is located at the bottom of the sampling sub-bucket, and the exhaust pipe is located at the top of the sampling sub-bucket.

[0014] Internal threads matching the external threads on the top of the sampling sub-bucket are provided on the inner wall of the bottom of the top cover. The top cover and the uppermost first sampling sub-bucket are connected through the matching of the internal threads and the external threads.

[0015] The bottom of the sampling sub-bucket is provided with a bottom. An annular sealing gasket groove is formed on the inner wall of the sampling sub-bucket below the bottom. An annular sealing gasket is arranged in the sealing gasket groove. The sealing gasket closely adheres to the sealing gasket groove and tightly fits with the bottom of the sampling sub-bucket.

[0016] An annular sealing gasket groove is provided on the inner wall of the top cover. An annular sealing gasket is arranged in the sealing gasket groove. The sealing gasket is closely attached to the sealing gasket groove and is closely attached to the top plate of the top cover.

[0017] The sealing gasket is closely attached to the sealing gasket groove and is closely attached to the bottom of the sampling sub-barrel or the top plate of the top cover, and will not fall off. The sampling sub-barrel is convenient for disassembly and connection. Different numbers of sampling sub-barrels can be connected as needed to achieve continuous sampling at different depths. The top of the external male thread for connection of the sampling sub-barrel located below closely adheres to the sealing gasket at the bottom of the upper sampling sub-barrel, and the top of the external male thread for connection of the first sampling sub-barrel at the uppermost part closely adheres to the sealing gasket below the top plate of the top cover.

[0018] Scale lines are provided on the rope connected to the tether loop.

[0019] The adjacent two scale lines are spaced 10 cm apart, and digital identifiers are provided every 1 m. The sampling depth can be accurately measured, and the total depth of the liquid can also be determined through the rope scale to determine multi-point sampling at a uniform depth interval.

[0020] When sampling from a certain sampling sub-barrel is required, the micro solenoid valve and the micro vacuum pump are opened simultaneously. The micro vacuum pump will pump out the gas in the sampling sub-barrel, and the liquid will enter the sampling sub-barrel under the action of negative pressure. After sampling is completed, the micro solenoid valve and the micro vacuum pump are closed simultaneously.

[0021] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model are as follows: The sampler provided by this solution is mainly used for sampling from storage tanks (for food, chemical products, oil products, etc.), rivers, and reservoirs storing liquids. The design fully considers the operation convenience and practicality of users; its production is not only simple, but also has a delicate structure, is easy to assemble and disassemble, is convenient to operate, saves time and effort, and greatly improves the user experience; the sampler can adapt to sampling requirements at different depths, realizes continuous sampling, and is not limited by the number of sampling points, which is particularly important in complex sampling tasks at multiple depths; the micro solenoid valve and the micro vacuum pump realize the automatic control of liquid sampling, and their simple operation reduces the manual labor intensity and saves valuable time and human resources; through precise sampling depth control and effective air exclusion in the container, this sampler ensures the accuracy of the sampling depth and sufficient sampling volume, which has significant practical value in the fields of scientific research, environmental monitoring, and product quality inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present utility model Figure 1 .

[0023] Figure 2 is a schematic diagram of the overall structure of the embodiment of the present utility model Figure 2。

[0024] Figure 3 This is a schematic structural diagram of the sampling sub - bucket for the hidden sealing gasket in the embodiment of the present utility model.

[0025] Figure 4 This is a schematic structural diagram of the top cover of the hidden sealing gasket in the embodiment of the present utility model.

[0026] Among them, the reference numerals are: 1, sampling sub - bucket; 2, tether loop; 3, bucket bottom; 4, sampling tube; 5, exhaust pipe; 6, micro - solenoid valve; 7, micro - vacuum pump; 8, top cover; 101, connecting internal thread; 102, connecting external thread; 103, sealing gasket groove. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further details the present utility model in combination with the attached drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "center", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the attached drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model. In addition, the term "first" is only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the feature defined with "first" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] Embodiment 1

[0032] See Figures 1 to 4 , the present utility model provides a liquid sampler, which includes a plurality of sampling sub-buckets 1. The plurality of sampling sub-buckets 1 are connected in series up and down by internal and external screws. A top cover 8 is connected to the top of the uppermost first sampling sub-bucket 1. A rope loop 2 is arranged at the center of the top of the top cover 8. A rope is connected to the rope loop 2, and the rope passes through the rope loop and is knotted and tied;

[0033] External threads 102 are provided on the outer walls of the tops of the sampling sub-buckets 1, and internal threads 101 are provided on the inner walls of the bottoms. Adjacent sampling sub-buckets 1 are connected by the thread matching between the internal thread 101 and the external thread 102;

[0034] This solution can connect the corresponding number of sampling sub-buckets according to the number of sampling points without replacing the entire sampling system. Users do not need to invest a large amount of cost at one time to purchase too many sampling devices, and can increase or decrease the number of sampling sub-buckets according to the number of sampling points, thereby reducing the initial investment cost.

[0035] Each sampling sub-bucket 1 is provided with an independent sampling inlet pipe 4 and an exhaust pipe 5. A micro solenoid valve 6 is connected to the sampling inlet pipe 4, and a filter screen can be provided at the outer end of the micro solenoid valve as needed. A micro vacuum pump 7 is connected to the exhaust pipe 5. Both the micro solenoid valve 6 and the micro vacuum pump 7 are electrically connected to an external controller.

[0036] The sampling inlet pipe 4 is located at the bottom of the sampling sub-bucket 1, and the exhaust pipe 5 is located at the top of the sampling sub-bucket 1.

[0037] Internal threads 101 matching the external threads 102 on the top of the sampling sub-bucket 1 are provided on the inner wall of the bottom of the top cover 8. The top cover 8 and the uppermost first sampling sub-bucket 1 are connected by the thread matching between the internal thread 101 and the external thread 102.

[0038] A bucket bottom 3 is provided at the bottom of the sampling sub-bucket 1. An annular sealing gasket groove 103 is formed on the inner wall of the sampling sub-bucket 1 below the bucket bottom 3. An annular sealing gasket is arranged in the sealing gasket groove 103. The sealing gasket closely adheres to the sealing gasket groove 103 and closely fits with the bucket bottom 3 of the sampling sub-bucket 1.

[0039] An annular sealing gasket groove 103 is formed on the inner wall of the top cover 8. An annular sealing gasket is arranged in the sealing gasket groove 103. The sealing gasket closely adheres to the sealing gasket groove 103 and closely fits with the top plate of the top cover 8.

[0040] The sealing gasket fits tightly in the sealing gasket groove and closely adheres to the bottom of the sampling sub-barrel or the top plate of the top cover, without falling off. The sampling sub-barrel is easy to disassemble and connect, and different numbers of sampling sub-barrels can be connected as needed to achieve continuous sampling at different depths. The top of the external male thread for connection of the sampling sub-barrel located below tightly adheres to the sealing gasket at the bottom of the upper sampling sub-barrel, and the top of the external male thread for connection of the first sampling sub-barrel at the uppermost part tightly adheres to the sealing gasket below the top plate of the top cover.

[0041] Scale lines are provided on the rope connected to the tether loop 2.

[0042] The interval between adjacent two scale lines is 10 cm, and digital identifiers are provided every 1 m, which can accurately measure the sampling depth. The total depth of the liquid can also be determined through the rope scale to determine multi-point sampling at uniform depth intervals.

[0043] When sampling from a certain sampling sub-barrel 1 is required, the micro solenoid valve 6 and the micro vacuum pump 7 are opened simultaneously. The micro vacuum pump 7 will pump out the gas in the sampling sub-barrel 1, and the liquid will enter the sampling sub-barrel 1 under the action of negative pressure. After sampling is completed, the micro solenoid valve 6 and the micro vacuum pump 7 are closed simultaneously.

[0044] In this solution, the micro solenoid valve 6 is used to control the liquid entering the sampling sub-barrel 1, ensuring the controllability of the sampling process, improving the sampling efficiency and reducing manual intervention. The amount of liquid entering the sampling sub-barrel can also be controlled by controlling the opening time of the solenoid valve 6.

[0045] When sampling from a specific depth is required, first, a signal is sent through the external controller to control the micro solenoid valve 6 to open. At the same time, the micro vacuum pump 7 is started, and the air in the sampling sub-barrel 1 is pumped out through the exhaust pipe 5 to create a negative pressure environment for the liquid to enter.

[0046] As the air in the sampling sub-barrel 1 is discharged, the liquid enters the sampling sub-barrel 1 through the sampling tube 4 under the action of the pressure difference.

[0047] When the liquid in the sampling sub-barrel 1 reaches the required amount or reaches the preset sampling time, the external controller will send a signal to close the micro solenoid valve 6, cut off the liquid inflow, and at the same time stop the operation of the micro vacuum pump 7 to complete the sampling process.

[0048] During the sampling process, the sealing performance of the micro solenoid valve 6 and the micro vacuum pump 7, and the sealing gaskets at the bottom of the sampling sub-barrel 1 and the top cover 8 can ensure the isolation of the sampling sub-barrel 1 from the external environment, avoiding the mixing of samples at different depths.

[0049] Embodiment 2

[0050] On the basis of Embodiment 1, the tether loop 2 is fixed to the top of the top cover 8 by welding or by screws.

[0051] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A liquid sampler, characterized in that, It includes a plurality of sampling buckets (1), and the plurality of sampling buckets (1) are connected in series up and down by internal and external screws. A top cover (8) is connected to the top of the uppermost first sampling bucket (1). A rope loop (2) is arranged at the center position of the top of the top cover (8), and a rope is connected to the rope loop (2); External threads for connection (102) are arranged on the outer walls of the tops of the sampling buckets (1), and internal threads for connection (101) are arranged on the inner walls of the bottoms. The adjacent sampling buckets (1) are connected through the thread matching between the internal threads for connection (101) and the external threads for connection (102); Each sampling bucket (1) is provided with an independent sampling tube (4) and an exhaust pipe (5). A micro solenoid valve (6) is connected to the sampling tube (4), and a micro vacuum pump (7) is connected to the exhaust pipe (5). Both the micro solenoid valve (6) and the micro vacuum pump (7) are electrically connected to an external controller.

2. The liquid sampler according to claim 1, wherein The sampling tube (4) is located at the bottom of the sampling bucket (1), and the exhaust pipe (5) is located at the top of the sampling bucket (1).

3. The liquid sampler according to claim 1, characterized in that, Internal threads for connection (101) matching the external threads for connection (102) on the top of the sampling bucket (1) are arranged on the inner wall of the bottom of the top cover (8). The top cover (8) and the uppermost first sampling bucket (1) are connected through the thread matching between the internal threads for connection (101) and the external threads for connection (102).

4. The liquid sampler according to claim 3, characterized in that, A bottom (3) is arranged at the bottom of the sampling bucket (1). An annular sealing gasket groove (103) is formed on the inner wall of the sampling bucket (1) below the bottom (3). An annular sealing gasket is arranged in the sealing gasket groove (103). The sealing gasket is closely attached in the sealing gasket groove (103) and is closely attached to the bottom (3) of the sampling bucket (1).

5. The liquid sampler according to claim 1, characterized in that, An annular sealing gasket groove (103) is formed on the inner wall of the top cover (8). An annular sealing gasket is arranged in the sealing gasket groove (103). The sealing gasket is closely attached in the sealing gasket groove (103) and is closely attached to the top plate of the top cover (8).

6. The liquid sampler according to claim 1, characterized in that, Scale lines are arranged on the rope connected to the rope loop (2).

7. The liquid sampler according to claim 6, wherein, The interval between two adjacent scale lines is 10 cm, and numerical markings are arranged every 1 m.

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