Water sampling tube

Abstract

The utility model discloses a water sampling tube, and belongs to the technical field of experimental apparatuses. The water sample sampling tube comprises a containing cavity, a sampling tube and a sampling tube, the water inlet end is arranged on the accommodating cavity and is communicated with the accommodating cavity; the water outlet end is arranged at the other end of the accommodating cavity relative to the water inlet end and is communicated with the accommodating cavity; the sampling end comprises a connecting pipe arranged on the side surface of the accommodating cavity and communicated with the accommodating cavity; one end of the hose is connected with the tail end of the adapter; the sampling end is located on the side face between the water inlet end and the water outlet end. Water enters from the water inlet end, flows into the accommodating cavity and is discharged from the water outlet end; in the process, the tail end of the hose is connected with the sample suction pipe, the water flows into the accommodating cavity to take away internal air, so that the internal pressure of the accommodating cavity is reduced, the water sample slowly enters the sample suction pipe under the action of pressure difference, and the sampling is completed when the scale line is reached. Due to the fact that water enters the water inlet end stably, stability of negative pressure in the containing cavity is guaranteed, and the problem that carbon dioxide in a water sample escapes due to the fact that the pressure change is large when the sample is sucked can be well solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of experimental instruments, and in particular relates to a water sampling tube. Background Art

[0002] When testing water samples for pH, free carbon dioxide and other items, large quantities of samples are pumped out using a mechanical pump. Because the pumping is too fast, the pressure changes greatly, causing some carbon dioxide in the water to escape, resulting in changes in the pH of the sample.

[0003] Therefore, it is necessary to design a water sampling tube to solve the problem that when taking water samples, the pressure changes greatly, causing the carbon dioxide in the water to escape, thereby affecting the accuracy of the test results. Utility Model Content

[0004] The utility model provides a water sampling tube to solve the above technical problems. In order to solve the above technical problems, the utility model adopts the following technical solutions: a water sampling tube, comprising: a containing cavity; a water inlet end, arranged on the containing cavity and connected with it; a water outlet end, arranged at the other end of the containing cavity relative to the water inlet end and connected with the containing cavity; a sampling end, comprising: a connecting pipe, arranged on the side of the containing cavity and connected with it; a hose, one end of which is connected to the end of the connecting pipe; the sampling end is on the side between the water inlet end and the water outlet end.

[0005] Furthermore, the water inlet end includes: a connecting pipe, which is arranged on the accommodating cavity and connected thereto; a buffer zone, one end of which is connected to the connecting pipe and the other end of which is provided with a water inlet; and a diameter of the buffer zone is larger than a diameter of the connecting pipe.

[0006] Furthermore, the longitudinal center lines of the connecting pipe, the buffer zone and the water inlet coincide with the longitudinal center line of the accommodating cavity.

[0007] Furthermore, the water outlet includes: a water outlet, which is arranged on the accommodating cavity; a water outlet pipe, one end of which is connected to the water outlet; and the diameter of the water outlet pipe at one end close to the water outlet is larger than the diameter of the water outlet.

[0008] Furthermore, the longitudinal center line of the water outlet and the water outlet pipe coincides with the longitudinal center line of the accommodating cavity.

[0009] Furthermore, one end of the water outlet pipe away from the water outlet is a closed structure. Furthermore, the water outlet end comprises: a support pipe, which is arranged in the water outlet pipe, and the two ends are movably connected to the corresponding positions of the water outlet pipe.

[0010] Furthermore, the sampling end is arranged on a side of the accommodating cavity close to one end of the connecting tube, and is located above 1 / 2 of the height of the accommodating cavity.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the present application, water is taken in through the water inlet end, the water flows into the containing chamber, and is discharged from the water outlet end; in this process, the end of the hose is connected to the sample suction tube, and as the water flows into the containing chamber, the internal air is taken away, causing the internal pressure of the containing chamber to drop. Under the action of the pressure difference, the water sample slowly enters the sample suction tube, and the sampling is completed when it reaches the scale line.

[0013] Since the water inlet end is stable, the negative pressure in the containing chamber is stable, which can effectively avoid the problem of carbon dioxide escaping from the water sample due to large pressure changes when sucking the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the main structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the water inlet structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the water outlet structure of the utility model.

[0018] Figure 4 It is a schematic diagram of the sampling end structure of the utility model.

[0019] Figure numerals: 1-accommodating chamber, 2-water inlet end, 21-connecting pipe, 22-buffer zone, 23-water inlet, 3-water outlet end, 31-water outlet, 32-water outlet pipe, 33-supporting pipe, 4-sampling end, 41-connecting pipe, 42-hose. DETAILED DESCRIPTION

[0020] In order to facilitate a better understanding of the present invention, the following examples are used to illustrate the present invention in conjunction with the accompanying drawings. These examples belong to the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0021] Example 1

[0022] A water sampling tube, such as Figure 1-Figure 4As shown, it includes: a accommodating chamber 1; a water inlet end 2, which is arranged on the accommodating chamber 1 and connected with the accommodating chamber 1; a water outlet end 3, which is arranged at the other end of the accommodating chamber 1 relative to the water inlet end 2 and connected with the accommodating chamber 1; a sampling end 4, including: a connecting pipe 41, which is arranged on the side of the accommodating chamber 1 and connected with the accommodating chamber 1; a hose 42, one end of which is connected to the end of the connecting pipe 41; the sampling end 4 is on the side between the water inlet end 2 and the water outlet end 3.

[0023] The size of the accommodating cavity is larger than the water inlet end and the water outlet end, so that the water entering from the water inlet end can be partially retained in the accommodating cavity.

[0024] When water flows into the container from the water inlet, care should be taken to control the flow rate of the water inlet to ensure that the water level in the containing chamber is below the connecting pipe, and water should be prevented from entering the connecting pipe.

[0025] Before sampling, the sampling tube is installed vertically (for example, tie the water inlet end with a rope and then hang it on a bracket such as an iron stand); the end of the hose not connected to the pipe is first connected to the sample suction tube, and the end of the sample suction tube is inserted into the water sample; the water inlet end is connected to the external water inlet pipe, and the bottom of the water outlet end is connected to the water tank; open the external water inlet, water flows into the containing chamber, and air is discharged with the flowing water; due to the pressure drop in the containing chamber, the water sample slowly enters the sample suction tube under the action of air pressure, and when the sample solution reaches the corresponding scale line (or exceeds), the hose can be removed to complete the sample suction operation.

[0026] Example 2

[0027] like Figure 1-Figure 2 As shown, the water inlet end 2 includes: a connecting pipe 21, which is arranged on the accommodating chamber 1 and communicates with it; a buffer zone 22, one end of which is connected to the connecting pipe 21 and the other end of which is provided with a water inlet 23; the diameter of the buffer zone 22 is larger than the diameter of the connecting pipe 21. Figure 1-Figure 2 As shown, the longitudinal center lines of the connecting pipe 21 , the buffer zone 22 , and the water inlet 23 coincide with the longitudinal center line of the accommodating chamber 1 .

[0028] The size of the buffer zone is larger than the water inlet and the connecting pipe, but smaller than the size of the accommodating cavity; e.g. Figure 1 As shown, the buffer zone is circular, and the number of the buffer zones can be 1, 2, etc., as required; the circular shape makes it easy to tie one end of a rope to the buffer zone and the other end to the iron frame.

[0029] The buffer zone provided at the water inlet end facilitates the water entering the water inlet to buffer in this area, then enter the connecting pipe, and finally enter the containing chamber; in this way, it can avoid excessive pressure changes in the containing chamber due to excessively fast water flow during the water inlet process, thereby causing the water sample suction pressure to be relatively high, which may cause the escape of carbon dioxide in the water sample.

[0030] Example 3

[0031] like Figure 1 , Figure 3 As shown, the water outlet 3 includes: a water outlet 31, which is arranged on the accommodating chamber 1; a water outlet pipe 32, one end of which is connected to the water outlet 31; and the diameter of the water outlet pipe 32 near the water outlet 31 is larger than the diameter of the water outlet 31.

[0032] like Figure 1 , Figure 3 As shown, the longitudinal center lines of the water outlet 31 and the water outlet pipe 32 coincide with the longitudinal center line of the accommodating chamber 1 .

[0033] like Figure 1 , Figure 3 As shown, one end of the water outlet pipe 32 away from the water outlet 31 is a closed structure.

[0034] like Figure 1 , Figure 3 As shown, the water outlet 3 includes: a support pipe 33, which is arranged in the water outlet pipe 32, and the two ends are movably connected to the corresponding positions of the water outlet pipe.

[0035] The size of the water outlet and the water outlet pipe is relatively small compared to the size of the accommodating chamber, so as to control the amount of water flowing out and ensure that a certain amount of water remains in the accommodating chamber.

[0036] Since the water flows out from the accommodating cavity toward the outlet, and the outlet and the outlet pipe are both closed structures, a support pipe is arranged in the outlet pipe, which not only supports the outlet pipe but also buffers the water flow to ensure stable water flow.

[0037] Example 4

[0038] like Figure 1 , Figure 4 As shown, the sampling end 4 is arranged on the side of the accommodating chamber 1 close to one end of the connecting tube 21 and is located above 1 / 2 of the height of the accommodating chamber 1; the connecting tube 41 is arranged tilted upward.

[0039] Since a certain amount of water needs to be retained in the accommodating chamber, it is more reasonable to arrange the connecting pipe at the upper end of the accommodating chamber; the connecting pipe is an upwardly inclined structure, which can prevent water from accidentally entering the connecting pipe and affecting the sampling operation.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the statement "including an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water sampling tube, characterized in that: include: Accommodating chamber (1); A water inlet end (2) is provided on the accommodating chamber (1) and is in communication with the accommodating chamber (1); A water outlet (3) is arranged at the other end of the accommodating chamber (1) relative to the water inlet (2) and is in communication with the accommodating chamber (1); The sampling end (4) comprises: a connecting pipe (41) disposed on the side of the containing chamber (1) and in communication with the containing chamber (1); and a hose (42) having one end connected to the end of the connecting pipe (41); The sampling end (4) is located on the side between the water inlet end (2) and the water outlet end (3).

2. A water sampling tube according to claim 1, characterized in that: The water inlet end (2) comprises: A connecting pipe (21) is provided on the accommodating chamber (1) and is in communication with the accommodating chamber (1); A buffer zone (22), one end of which is connected to the connecting pipe (21) and the other end of which is provided with a water inlet (23); The diameter of the buffer zone (22) is greater than the diameter of the connecting tube (21).

3. A water sampling tube according to claim 2, characterized in that: The longitudinal center lines of the connecting pipe (21), the buffer zone (22) and the water inlet (23) coincide with the longitudinal center line of the accommodating chamber (1).

4. A water sampling tube according to claim 3, characterized in that: The water outlet (3) comprises: A water outlet (31) is provided on the accommodating chamber (1); A water outlet pipe (32), one end of which is connected to the water outlet (31); The diameter of the water outlet pipe (32) at one end close to the water outlet (31) is larger than the diameter of the water outlet (31).

5. A water sampling tube according to claim 4, characterized in that: The longitudinal center lines of the water outlet (31) and the water outlet pipe (32) coincide with the longitudinal center line of the accommodating chamber (1).

6. A water sampling tube according to claim 5, characterized in that: One end of the water outlet pipe (32) away from the water outlet (31) is a closed structure.

7. A water sampling tube according to any one of claims 4 to 6, characterized in that: The water outlet (3) comprises: The support pipe (33) is arranged in the water outlet pipe (32), and both ends are movably connected to corresponding positions of the water outlet pipe.

8. A water sampling tube according to claim 7, characterized in that: The sampling end (4) is arranged on the side of the accommodating chamber (1) close to one end of the connecting tube (21) and is located above 1 / 2 of the height of the accommodating chamber (1).

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