Sampling device

Abstract

The utility model provides a sampling device, which is used for liquid sampling and comprises a first connecting pipe and a second connecting pipe, the second connecting pipe is arranged in the first connecting pipe, a telescopic structure is arranged between the first connecting pipe and the second connecting pipe, and when the second connecting pipe is used, at least part of the second connecting pipe extends to the outer side of the first connecting pipe along the inner wall of the first connecting pipe through the telescopic structure; the sampling device is detachably connected to the first end of the second connecting pipe, the sampling device comprises an adjusting plug, the adjusting plug is movably arranged in the sampling device, the side face of the adjusting plug abuts against the inner wall of the sampling device, and the position of the adjusting plug in the sampling device is adjustable so that quantitative sampling can be achieved. According to the sampling device, quantitative sampling can be achieved, and the convenience and safety during liquid medicine sampling are improved.

Description

Technical Field

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

[0002] In the production process of circuit boards, various complex process chemicals are required. The circuit boards are etched to obtain the final form of the carrier. As the first driving force for the production of the carrier, the quality of the chemicals is particularly important. When personnel take samples of the chemicals, they not only have requirements for the convenience and safety of the chemical sampling device, but also have requirements for the sampling amount of the chemicals according to the actual usage. Taking less samples will result in insufficient sampling, and taking more samples will cause waste. When using the existing sampling devices, it is not easy to control the sampling amount, and it is impossible to accurately estimate the sampling amount during sampling. This defect is particularly obvious especially when the chemical tank is relatively deep or the sampling amount cannot be seen clearly due to the heavy color of the chemicals or the sampling device is blocked and cannot be seen. Summary of the Utility Model

[0003] In order to overcome the defects in the prior art, the embodiment of the utility model provides a sampling device, which can realize quantitative sampling and improve the convenience and safety during chemical sampling.

[0004] To achieve the above object, the technical solution adopted by the utility model is:

[0005] The utility model discloses a sampling device for liquid sampling, comprising:

[0006] A first connecting pipe;

[0007] A second connecting pipe, the second connecting pipe is disposed inside the first connecting pipe, and a telescopic structure is provided between the first connecting pipe and the second connecting pipe. When the second connecting pipe is in use, at least part of the second connecting pipe extends to the outside of the first connecting pipe along the inner wall of the first connecting pipe through the telescopic structure;

[0008] A sampler, the sampler is detachably connected to the first end of the second connecting pipe. The sampler includes an adjusting plug, the adjusting plug is movably disposed inside the sampler, the side surface of the adjusting plug abuts against the inner wall of the sampler, and the position of the adjusting plug inside the sampler is adjustable for quantitative sampling.

[0009] Through the provision of the telescopic first connecting pipe and second connecting pipe, the above technical solution can adjust the length of the sampling device according to the actual sampling depth, improving the convenience and safety of the sampling process, adapting to sampling tanks and samples at different depths. During sampling, the movable adjusting plug serves as the bottom of the sampler, and the volume from the sampling port to the adjusting plug is the sampling volume. Even when the medicine trough is relatively deep or it is impossible to judge the sampling volume of the medicine due to the obstruction of the medicine, quantitative sampling can still be achieved, which is convenient and fast and can avoid insufficient or wasted sampling volume. The connecting pipes of the sampling device can be set as the first connecting pipe and the second connecting pipe, and a third connecting pipe or more connecting pipes can be additionally provided according to different requirements. The provided first connecting pipe, second connecting pipe and sampler are made of acid and alkali corrosion-resistant materials.

[0010] Further, it further includes an adjusting rod. The adjusting plug is provided with a first adjusting thread, and the adjusting rod is provided with a second adjusting thread. The first adjusting thread and the second adjusting thread are in spiral connection, so that the adjusting rod and the adjusting plug are detachably connected. During use, the adjusting rod is connected to the adjusting plug, the adjusting rod is moved, driving the adjusting plug to move in the sampler, so that the adjusting plug is in a preset position.

[0011] When the adjusting plug is arranged in the sampler, the adjusting plug abuts against the inner wall of the sampler so that the sample will not leak to the bottom of the sampler. Driving the adjusting plug to move by using the adjusting rod can make the adjustment process easier to achieve. The adjusting rod itself has a certain volume. If it is fixedly connected in the sampler, it will cause an error in the final sampling volume. When the adjusting rod drives the adjusting plug to move to the preset position, rotate the adjusting rod to separate the adjusting rod from the adjusting plug.

[0012] Further, the interiors of the first connecting pipe and the second connecting pipe are hollow structures. The diameter of the second connecting pipe is smaller than that of the first connecting pipe, and the length of the second connecting pipe is smaller than that of the first connecting pipe.

[0013] Since the second connecting pipe can be contracted into the first connecting pipe when not needed, and the length and diameter of the second connecting pipe are smaller than those of the first connecting pipe, it can make the sampling device more convenient to use.

[0014] Further, a first diversion groove is provided on the outer side of the wall of the first connecting pipe. The first diversion groove is arranged along the length direction of the first connecting pipe. The length of the first diversion groove is less than or equal to the length of the first connecting pipe. The width of the first diversion groove is less than or equal to 0.5 times the diameter of the first connecting pipe. The depth of the first diversion groove is less than or equal to 2 / 3 times the wall thickness of the first connecting pipe.

[0015] Further, at least one first diversion groove is provided on the first connecting pipe, the at least one first diversion groove is arranged at intervals along the circumferential direction of the first diversion pipe, and the total width of the at least one first diversion groove is less than or equal to 0.5 times the diameter of the first connecting pipe.

[0016] Further, a second diversion groove is provided on the outer side of the wall of the second connecting pipe, the second diversion groove is arranged along the length direction of the second connecting pipe, the length of the second diversion groove is less than or equal to the length of the second connecting pipe, the width of the second diversion groove is less than or equal to 0.5 times the diameter of the second connecting pipe, and the depth of the second diversion groove is less than or equal to 2 / 3 times the wall thickness of the second connecting pipe.

[0017] Further, at least one second diversion groove is provided on the second connecting pipe, the at least one second diversion groove is arranged at intervals along the circumferential direction of the second diversion pipe, and the total width of the at least one second diversion groove is less than or equal to 0.5 times the diameter of the second connecting pipe.

[0018] The diversion grooves provided on the connecting pipe can improve the hydrophobic performance of the surface of the connecting pipe and prevent damage caused by dripping of the liquid medicine during sampling. The longer the length of the provided diversion groove, the lower the damage caused by dripping. If the width of the provided diversion groove is too narrow, the hydrophobic performance is not good. If it is too wide, the strength of the connecting pipe will decrease. The depth of the provided diversion groove is also to achieve better hydrophobic performance while avoiding reducing the strength of the connecting pipe itself.

[0019] Further, the telescopic structure includes a first thread provided on the inner side of the wall of the first connecting pipe and a second thread provided on the outer side of the wall of the second connecting pipe.

[0020] The first thread and the second thread are in screw connection, so that the second connecting pipe can telescopically move along the inner wall of the first connecting pipe. When the second connecting pipe extends along the inner wall of the first connecting pipe to the maximum length, the first end of the first connecting pipe is connected to the second end of the second connecting pipe.

[0021] Through the cooperation and connection of the first thread and the second thread, the control of the telescopic length of the first connecting pipe and the second connecting pipe can be realized. The first thread and the second thread can be clamped at any position to realize the control of any length of the sampling device.

[0022] Further, a connecting rod is provided on the outer side of the sampler, a third thread is provided on the inner side of the wall of the second connecting pipe, and a connecting thread is provided on the connecting rod. The connecting thread is in screw connection with the third thread, so that the sampler is detachably connected to the second connecting pipe.

[0023] The sampling device is provided with a detachable sampler, which can make the sampler more convenient to disassemble and replace, and is convenient for pouring samples and cleaning the sampler.

[0024] Furthermore, the second end of the first connecting tube is connected to a handle, at least a portion of the handle is provided with patterns, and a hook is provided at the tail of the handle.

[0025] When using the sampling device to take samples, a textured handle is provided at the top of the sampling device to increase friction and prevent the sampling device from slipping. At the same time, the handle is made of corrosion-resistant material to enhance the performance of the handle.

[0026] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0027] 1. The present application sets an adjustment plug on the sampler. By adjusting the position of the adjustment plug, the sampling amount can be quantitatively controlled according to actual needs. The operation is convenient and quick, and insufficient or wasteful sampling can be avoided. It is especially suitable for situations where the medicine tank is deep or the sampling process cannot be seen clearly.

[0028] 2. The present application provides a guide groove on the wall of the connecting pipe, thereby improving the hydrophobicity of the surface of the connecting pipe, preventing damage caused by splashing of medicine during sampling, and improving the safety of the sampling process.

[0029] 3. The present application provides a threaded structure on the tube wall of the first connecting tube and the second connecting tube to form a telescopic structure. When sampling, the length of the sampling device can be adjusted according to the depth of the sample, thereby reducing the difficulty of sampling.

[0030] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic cross-sectional structure diagram of an extended sampling device provided in an embodiment of the present application;

[0033] Figure 2 It is a schematic diagram of the cross-sectional structure of a sampling device after contraction provided by the present application;

[0034] Figure 3 It is a schematic diagram of a cross-sectional structure of a sampler provided in an embodiment of the present application;

[0035] Figure 4It is a schematic cross-sectional view of an adjusting rod provided by an embodiment of the present application;

[0036] Figure 5 It is a schematic cross-sectional view of a first connecting pipe provided by an embodiment of the present application;

[0037] Figure 6 It is a schematic cross-sectional view of a second connecting pipe provided by an embodiment of the present application.

[0038] Reference numerals in the above figures: 1, first connecting pipe; 2, second connecting pipe; 3, sampler; 4, connecting rod; 5, adjusting plug; 6, scale line; 7, handle; 8, hanging buckle; 9, texture; 10, adjusting rod; 11, first diversion groove; 21, second diversion groove. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Additionally, the accompanying drawings of the present utility model are only for simple schematic illustration and are not drawn according to actual dimensions. This is stated in advance.

[0040] In the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "forward", "backward", "between", "close to", "far from", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for facilitating the description of 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 should not be construed as a limitation to the present utility model. It also should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" 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 directly connected or indirectly connected. 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 circumstances.

[0041] It should be understandable that although terms such as "first", "second", "third", etc. may be used in this article to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. Additionally, the term "or" used in this article should, depending on the actual situation, possibly include any one or a combination of multiple related listed items.

[0042] Refer to Figures 1 to 2, according to an embodiment of the present utility model, a sampling device is provided, which includes a first connecting pipe 1, a second connecting pipe 2, and a sampler 3. A telescopic structure is provided between the first connecting pipe 1 and the second connecting pipe 2. The second connecting pipe 2 extends outside the first connecting pipe 1 through the telescopic structure. The sampler 3 is detachably connected to the first end of the second connecting pipe 2. The sampler 3 includes an adjusting plug 5, which is movably arranged in the sampler 3. The side surface of the adjusting plug 5 abuts against the inner wall of the sampler 3, and the position of the adjusting plug 5 in the sampler 3 is adjustable for quantitative sampling.

[0043] With the above structure, during the use of the sampling device in the embodiment of the present application, the sampling amount can be quantitatively regulated through the adjusting plug 5. The provided telescopic connecting pipe can select the sampling length according to the actual situation. The above provided sampling device can improve the safety and convenience of the sampling process, and can be applied not only to liquid medicine but also to the sampling of other liquids.

[0044] See Figure 2 , the present application provides a retractable sampling device, which includes a first connecting pipe 1, a second connecting pipe 2, and a sampler 3. A telescopic structure is provided between the first connecting pipe 1 and the second connecting pipe 2, and the second connecting pipe 2 is retracted inside the first connecting pipe 1.

[0045] In a possible embodiment, the first connecting pipe 1 and the second connecting pipe 2 are provided as internally hollow cylindrical tubular structures. The diameter of the second connecting pipe 2 is smaller than that of the first connecting pipe 1, so that the second connecting pipe 2 can be retracted into the first connecting pipe 1. The length of the second connecting pipe 2 is smaller than that of the first connecting pipe 1, which is convenient for retracting the second connecting pipe 2 into the first connecting pipe 1.

[0046] Since the sample to be sampled has certain corrosiveness, the first connecting pipe 1, the second connecting pipe 2, and the sampler 3 need to use corrosion-resistant materials, such as corrosion-resistant plastics or stainless steel, etc. The present application does not describe it in detail here.

[0047] In a possible embodiment, the telescopic structure includes a first thread provided on the inner side of the wall of the first connecting pipe 1 and a second thread provided on the outer side of the wall of the second connecting pipe 2. The first thread is arranged along the length direction of the first connecting pipe 1, so that the entire inner surface of the wall of the first connecting pipe 1 is provided with the first thread. The second thread is arranged along the length direction of the second connecting pipe 2, so that the entire outer surface of the wall of the second connecting pipe 2 is provided with the second thread.

[0048] The first connecting pipe 1 and the second connecting pipe 2 are spirally connected through the first thread and the second thread, and through the cooperation of the first thread and the second thread, the second connecting pipe 2 is retracted into the first connecting pipe 1, as Figure 2As shown, the second connecting pipe 2 can also extend to the outside of the first connecting pipe 1. When the second connecting pipe 2 extends along the inner wall of the first connecting pipe 1 to its maximum length, the first end of the first connecting pipe 1 is connected to the second end of the second connecting pipe 2, as Figure 1 shown. The first connecting pipe 1 and the second connecting pipe 2 can be stopped and fixed at any position where the first thread and the second thread are engaged, so that the sampling length of the sampling device meets the actual sampling requirements, realizing arbitrary adjustment of the length of the sampling device.

[0049] It should be noted that the sampling device in this application includes two connecting pipes, namely the first connecting pipe 1 and the second connecting pipe 2, which is only taken as a possible embodiment. In other possible embodiments, the sampling device includes at least two connecting pipes. For example, it can include three connecting pipes, four connecting pipes or several connecting pipes, and this application does not make specific limitations here.

[0050] In a possible embodiment, a handle 7 is connected to the second end of the first connecting pipe 1. The handle 7 is used for holding the sampling device by hand during sampling. The handle 7 is made of a corrosion-resistant material. For example, it can be made of corrosion-resistant plastic, stainless steel, etc. At least part of the surface of the handle 7 is provided with patterns 9, which can increase the friction when holding the sampling device and prevent the sampling device from falling off during sampling. There are various connection methods between the handle 7 and the first connecting pipe 1. For example, it can be welded or thread-connected, etc., and this application does not make specific limitations here.

[0051] One end of the handle 7 is connected to the first connecting pipe 1, and the other end is connected with a hanging hook 8. The hanging hook 8 is used to hang the sampling device at a fixed position, which is convenient for storage and arrangement. The hanging hook 8 can be arranged on the handle 7 in any form. For example, it can be fixed on the handle 7 by welding or thread connection. The hanging hook 8 can be made of the same material as the handle 7, or it can be a coil, and this application does not make specific limitations here.

[0052] As Figure 5 shown, a first diversion groove 11 is provided on the outer side of the pipe wall of the first connecting pipe 1. The first diversion groove 11 is used for hydrophobicity on the surface of the first connecting pipe 1, preventing damage caused by dripping of the liquid medicine along the pipe wall due to poor hydrophobicity during sampling, and can improve the safety of the sampling process. In a possible embodiment, the first diversion groove 11 is arranged along the length direction of the first connecting pipe 1. The first diversion groove 11 can be arranged in various shapes along the pipe wall of the first connecting pipe 1, such as a straight line or a curve, and this application does not describe it in detail here.

[0053] Since the first diversion groove 11 is set to improve the hydrophobic performance of the surface of the first connecting pipe 1 and is a concave groove formed on the surface of the first connecting pipe 1, the length of the set first diversion groove 11 should conform to the length of the first connecting pipe 1, and at the same time, the set first diversion groove 11 cannot affect the strength and overall performance of the first connecting pipe 1.

[0054] Preferably, the length of the first diversion groove 11 is less than or equal to the length of the first connecting pipe 1, the width of the first diversion groove is less than or equal to 0.5 times the diameter of the first connecting pipe 1, and the depth of the first diversion groove 11 is less than or equal to 2 / 3 times the wall thickness of the first connecting pipe 1. When the length, width and depth of the first diversion groove 11 are set within this range, the hydrophobicity of the first diversion groove 11 can reach the optimal value, and the risk of liquid splashing during sampling is reduced.

[0055] As Figure 5 shown, in a possible embodiment, three first diversion grooves 11 are provided on the first connecting pipe 1, which can further improve the hydrophobic performance of the surface of the first connecting pipe 1. The three first diversion grooves 11 are arranged at intervals along the circumferential direction of the first diversion pipe 1, and the total width of the three first diversion grooves 11 is less than or equal to 0.5 times the diameter of the first connecting pipe 1.

[0056] As Figure 6 shown, a second diversion groove 21 is provided on the outer side of the wall of the second connecting pipe 2. The second diversion groove 21 is used for the hydrophobicity of the surface of the second connecting pipe 2, preventing damage caused by liquid dripping along the pipe wall due to poor hydrophobicity during sampling, and can improve the safety of the sampling process. In a possible embodiment, the second diversion groove 21 is arranged along the length direction of the second connecting pipe 2, and the second diversion groove 21 can be arranged in various shapes along the wall of the second connecting pipe 2, such as a straight line or a curve, which will not be described in detail in this application.

[0057] Since the second diversion groove 21 is provided to improve the hydrophobic performance of the surface of the second connecting pipe 2 and form a concave groove on the surface of the second connecting pipe 2, the length of the second diversion groove 21 should conform to the length of the second connecting pipe 2, and at the same time, the second diversion groove 21 should not affect the strength and overall performance of the second connecting pipe 2.

[0058] Preferably, the length of the second diversion groove 21 is less than or equal to the length of the second connecting pipe 2, the width of the second diversion groove 21 is less than or equal to 0.5 times the diameter of the second connecting pipe 2, and the depth of the second diversion groove 21 is less than or equal to 2 / 3 times the wall thickness of the second connecting pipe 2. When the length, width and depth of the second diversion groove 21 are set within this range, the hydrophobicity of the second diversion groove 21 can reach the optimal value, and the risk of liquid splashing during sampling is reduced.

[0059] As Figure 6 shown, in a possible embodiment, three second diversion grooves 21 are provided on the second connecting pipe 2, which can further improve the hydrophobic performance of the surface of the second connecting pipe 2. The three second diversion grooves 21 are arranged at intervals along the circumferential direction of the second diversion pipe 2, and the total width of the three second diversion grooves 21 is less than or equal to 0.5 times the diameter of the second connecting pipe 2.

[0060] In a possible embodiment, a third thread is further provided on the inner side of the wall of the second connecting pipe 2, and the third thread is provided at least at the first end of the second connecting pipe 2.

[0061] As Figures 1 to 2 shown, a sampler 3 is provided on the sampling device, and the sampler 3 is used for sampling. Since the sample to be sampled has certain corrosiveness, the sampler 3 needs to be made of corrosion-resistant materials, such as corrosion-resistant plastics or stainless steel, etc., which are not described in detail in this application.

[0062] As Figure 4 shown, in a possible embodiment, the sampler 3 is provided as a cylindrical structure, and an adjusting plug 5 is provided on the sampler 3, which can perform quantitative sampling and improve the accuracy of the sampling amount.

[0063] Specifically, the sampler 3 is detachably connected to the first end of the second connecting pipe 2. A scale line 6 is provided on the wall surface of the sampler 3. The adjusting plug 5 is movably arranged in the sampler 3. The side surface of the adjusting plug 5 abuts against the inner wall of the sampler 3 to prevent liquid from leaking from the connection position between the adjusting plug 5 and the sampler 3. The adjusting plug 5 adjusts its position according to the scale line 6 for quantitative sampling. The adjusting plug 5 is made of acid and alkali resistant and corrosion resistant materials, for example, a corrosion resistant soft plug can be used, which can fit more closely with the inner wall of the sampler 3.

[0064] When the scale line 6 is set on the sampler 3, the scale value with a smaller value is set at the position closer to the sampling port of the sampler 3, and the scale value with a larger value is set at the position closer to the bottom of the sampler 3. The adjusting plug 5 is adjusted to a preset position according to the size of the scale line 6 according to actual needs. During sampling, the adjusting plug 5 serves as the bottom of the sampler 3, and the volume from the sampling port to the adjusting plug 5 is the sampling amount.

[0065] The sampling device further includes an adjusting rod 10. As Figure 3 shown, a structural schematic diagram of an adjusting rod is provided in this application. The adjusting rod 10 is used for detachably connecting to the adjusting plug 5 to drive the adjusting plug 5 to move. As Figures 1 to 4 shown, a first adjusting thread is provided on the adjusting plug 5, and a second adjusting thread is provided on the adjusting rod 10. When the first adjusting thread and the second adjusting thread are spirally connected, hold the adjusting rod 10 and move the adjusting rod 10 to drive the adjusting plug 5 to move up and down in the sampler 3 so that the adjusting plug 5 is in a preset position.

[0066] Before sampling, insert the adjusting rod 10 into the sampler 3 and spirally connect it to the adjusting plug 5 through the first adjusting thread and the second adjusting thread. After the connection is completed, move the adjusting plug 5 up or down to make the adjusting plug 5 move to the specified scale line position. After rotating the first adjusting thread and the second adjusting thread to disassemble the adjusting rod 10, sampling can be carried out.

[0067] A connecting rod 4 is connected to the outside of the sampler 3. In a possible embodiment, the connecting rod 4 is provided with a connecting thread, and the connecting thread is spirally connected to the third thread on the inner side of the wall of the second connecting pipe 2, so that the sampler 3 and the second connecting pipe 2 are detachably connected together. During sampling, the sampler 3 is connected to the second connecting pipe 2. After sampling is completed, the sampler 3 can be removed, which is convenient for pouring the sample and cleaning the sampler 3.

[0068] During use, the sampler 3 is connected to the second connecting pipe 2. The first connecting pipe 1 and the second connecting pipe 2 are adjusted according to the depth of the sample to be taken, so that the length of the sampling device conforms to the depth where the sample to be taken is located. At this time, the sampler 3 has been adjusted to the sampling position. The sampling device is inserted into the sample for sampling. After sampling is completed, the sample is poured into the required container.

[0069] In the sampling device provided in this application, by setting an adjusting plug on the sampler and adjusting the position of the adjusting plug, the sampling amount can be quantitatively controlled according to actual needs. The operation is convenient and fast, which can avoid insufficient sampling or waste. It is especially suitable for the situation where the medicine water tank is deep or it is impossible to see the sampling process clearly. A diversion groove is provided on the wall of the connecting pipe, which can improve the hydrophobic performance of the surface of the connecting pipe and prevent the medicine water from dripping and splashing along the pipe wall due to poor hydrophobicity during sampling, thus improving the safety of the sampling process. By setting a threaded structure on the walls of the first connecting pipe and the second connecting pipe, the formed telescopic structure can adjust the length of the sampling device according to the depth of the position where the sample is located during sampling, which can reduce the sampling difficulty.

[0070] In this utility model, specific embodiments are used to elaborate the principle and implementation manner of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the utility model.

Claims

1. A sampling device for liquid sampling, characterized in that, Comprising: A first connecting pipe; A second connecting pipe, the second connecting pipe is disposed inside the first connecting pipe, and a telescopic structure is provided between the first connecting pipe and the second connecting pipe. When the second connecting pipe is in use, at least a part of the second connecting pipe extends to the outside of the first connecting pipe along the inner wall of the first connecting pipe through the telescopic structure; A sampler, the sampler is detachably connected to the first end of the second connecting pipe. The sampler includes an adjusting plug, the adjusting plug is movably disposed inside the sampler, the side surface of the adjusting plug abuts against the inner wall of the sampler, and the position of the adjusting plug inside the sampler is adjustable for quantitative sampling.

2. The sampling device according to claim 1, wherein It further includes an adjusting rod. The adjusting plug is provided with a first adjusting thread, and the adjusting rod is provided with a second adjusting thread. The first adjusting thread and the second adjusting thread are helically connected, so that the adjusting rod and the adjusting plug are detachably connected. When in use, the adjusting rod is connected to the adjusting plug, and the adjusting rod moves to drive the adjusting plug to move inside the sampler, so that the adjusting plug is in a preset position.

3. The sampling device according to claim 1, wherein The interiors of the first connecting pipe and the second connecting pipe are hollow structures. The diameter of the second connecting pipe is smaller than the diameter of the first connecting pipe, and the length of the second connecting pipe is smaller than the length of the first connecting pipe.

4. The sampling device according to claim 1, wherein A first flow guiding groove is provided on the outer side of the wall of the first connecting pipe. The first flow guiding groove is arranged along the length direction of the first connecting pipe. The length of the first flow guiding groove is less than or equal to the length of the first connecting pipe. The width of the first flow guiding groove is less than or equal to 0.5 times the diameter of the first connecting pipe. The depth of the first flow guiding groove is less than or equal to 2 / 3 times the wall thickness of the first connecting pipe.

5. The sampling device according to claim 4, wherein At least one first flow guiding groove is provided on the first connecting pipe. At least one first flow guiding groove is arranged at intervals along the circumferential direction of the first connecting pipe. The total width of at least one first flow guiding groove is less than or equal to 0.5 times the diameter of the first connecting pipe.

6. The sampling device according to claim 1, wherein, A second flow guiding groove is provided on the outer side of the wall of the second connecting pipe. The second flow guiding groove is arranged along the length direction of the second connecting pipe. The length of the second flow guiding groove is less than or equal to the length of the second connecting pipe. The width of the second flow guiding groove is less than or equal to 0.5 times the diameter of the second connecting pipe. The depth of the second flow guiding groove is less than or equal to 2 / 3 times the wall thickness of the second connecting pipe.

7. The sampling device according to claim 6, wherein, At least one second flow guiding groove is provided on the second connecting pipe. At least one second flow guiding groove is arranged at intervals along the circumferential direction of the second connecting pipe. The total width of at least one second flow guiding groove is less than or equal to 0.5 times the diameter of the second connecting pipe.

8. A sampling device according to claim 1, characterized in that, The telescopic structure includes a first thread provided on the inner side of the wall of the first connecting pipe and a second thread provided on the outer side of the wall of the second connecting pipe. The first thread and the second thread are helically connected, so that the second connecting pipe can telescopically move along the inner wall of the first connecting pipe. When the second connecting pipe extends to the maximum length along the inner wall of the first connecting pipe, the first end of the first connecting pipe is connected to the second end of the second connecting pipe.

9. The sampling device according to claim 1, characterized in that, A connecting rod is provided on the outside of the sampler. The inner side of the wall of the second connecting pipe is provided with a third thread, and the connecting rod is provided with a connecting thread, and the connecting thread is helically connected to the third thread, so that the sampler and the second connecting pipe are detachably connected.

10. The sampling device according to claim 1, characterized in that, A handle is connected to the second end of the first connecting pipe. At least part of the handle is provided with a texture, and a hanging hook is provided at the tail of the handle.

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