Dissolved oxygen measuring device

Abstract

The utility model provides a dissolved oxygen measuring device which comprises a dissolved oxygen measuring body electrically connected with an electrode through a connecting wire. The top of the water storage container is provided with a first through hole into which the electrode extends, the bottom of the water storage container is communicated with a drainage pipe, and the drainage pipe is provided with a stop valve; a water inlet and a water outlet of the water delivery pump are communicated with a flexible water inlet pipe and a water outlet pipe respectively, and the end, away from the water delivery pump, of the water outlet pipe is communicated to the side wall of the water storage container; a winding wheel is rotationally arranged in the storage box, and the free end of the flexible water inlet pipe sequentially penetrates through the storage box, then is wound on the winding wheel and penetrates through the storage box to be immersed in water with dissolved oxygen to be measured. The electrode is prevented from being exposed in the air, the accuracy of the electrode detection result is improved, the service life of the electrode is prolonged, and the device can be suitable for long-distance sampling and is high in applicability.

Description

Technical Field

[0001] This application relates to the technical field of water quality analysis, and particularly relates to a dissolved oxygen measuring device. Background Art

[0002] The molecular oxygen in the air dissolved in water is called dissolved oxygen. The content of dissolved oxygen in water is closely related to the partial pressure of oxygen in the air and the temperature of the water. Under natural conditions, the oxygen content in the air changes little, so the water temperature is the main factor. The lower the water temperature, the higher the content of dissolved oxygen in the water. The molecular oxygen dissolved in water is called dissolved oxygen, usually denoted as DO, and is expressed in milligrams of oxygen per liter of water. The amount of dissolved oxygen in water is an index to measure the self-purification ability of water bodies.

[0003] However, existing dissolved oxygen is usually measured by the electrochemical probe method by measuring the current or potential change between the dissolved oxygen in water and the electrode to determine the concentration of dissolved oxygen. According to the national standard HJ506 Determination of Dissolved Oxygen in Water - Electrochemical Probe Method, during the on-site test of dissolved oxygen, the electrode of the dissolved oxygen tester is usually directly inserted into the container containing the dissolved oxygen solution to be measured. For different measurement samples, the electrode needs to be continuously inserted into the container, and after the test is completed, the electrode is taken out of the container and inserted into the next container containing the dissolved oxygen solution to be measured. This is likely to cause pulling on the electrode and the connecting wire between the electrode and the dissolved oxygen tester, and the poor sealing of the entire detection process makes the electrode inevitably exposed to the air, making it difficult to meet the standard measurement requirements during the detection process, thereby reducing the accuracy and service life of the electrode detection results. Utility Model Content

[0004] This application provides a dissolved oxygen measuring device to solve the technical problems described in the above background art.

[0005] To solve the above technical problems, this application adopts the following technical solutions to solve:

[0006] This application provides a dissolved oxygen measuring device, including:

[0007] A dissolved oxygen measurement body, the dissolved oxygen measurement body is electrically connected to an electrode through a connecting wire;

[0008] A water storage container, the top of the water storage container is provided with a first through hole for the electrode to extend into it, and its bottom is communicated with a drain pipe, and a stop valve is arranged on the drain pipe;

[0009] A water pump, the inlet and outlet of the water pump are respectively communicated with a flexible inlet pipe and an outlet pipe, and the end of the outlet pipe away from the water pump is communicated with the side wall of the water storage container;

[0010] A storage box, wherein a wire winding wheel is rotatably arranged in the storage box, and the free end of the flexible water inlet pipe sequentially penetrates through the storage box, is wound around the wire winding wheel and then penetrates through the storage box to immerse in the water to be measured for dissolved oxygen.

[0011] Optionally, the dissolved oxygen measuring device further includes a magnetic stirring assembly;

[0012] The magnetic stirring assembly includes a magnetic stirrer and a magnet;

[0013] Support columns are arranged at the bottom of the water storage container, a support base is arranged at the bottom end of the support columns, the lower surface of the support base is arranged on the upper surface of the magnetic stirrer, and the magnet is arranged in the water storage container;

[0014] The drain pipe is L-shaped, the top end of the drain pipe is communicated with the bottom of the water storage container and its height is less than the height of the support columns.

[0015] Optionally, one end of the water outlet pipe communicated with the water storage container is communicated with a right-angle pipe located in the water storage container, and one end of the right-angle pipe far away from the water outlet pipe is vertically oriented towards the inner bottom surface of the water storage container.

[0016] Optionally, the bottom end of the electrode penetrates through the first through hole and extends into the water storage container and is at a first preset distance from the inner bottom surface of the water storage container;

[0017] One end of the right-angle pipe far away from the water outlet pipe is at a second preset distance from the inner bottom surface of the water storage container;

[0018] Wherein, the second preset distance is greater than the first preset distance.

[0019] Optionally, the top of the water storage container is hermetically provided with a first top cover, and the first through hole is opened in the middle of the first top cover.

[0020] Optionally, second through holes matching the flexible water inlet pipe are opened on opposite side walls of the storage box, and a second top cover is hinged to the top of the storage box.

[0021] Optionally, a gravity ball is arranged at the free end of the flexible water inlet pipe.

[0022] Optionally, a visual observation window is opened on the side wall of the water storage container.

[0023] Optionally, the flexible water inlet pipe is an armored rubber hose.

[0024] The dissolved oxygen measuring device provided by this application inserts an electrode electrically connected to the dissolved oxygen measuring body through a connecting wire into a water storage container, then pulls out the free end of the flexible water inlet pipe from the storage box and extends it into the water with the dissolved oxygen to be measured. Turn on the water pump so that the water with the dissolved oxygen to be measured enters the water storage container through the flexible water inlet pipe, the water pump and the water outlet pipe. Turn on the dissolved oxygen measuring body to measure the dissolved oxygen in the water in the water storage container. When it is necessary to measure the dissolved oxygen of another sample, open the stop valve to drain the water that has been measured in the water storage container to the outside of the water storage container through the drain pipe, and then repeat the above process to pump the next water with the dissolved oxygen to be measured into the water storage container. During the above-mentioned dissolved oxygen measurement process, the electrode is always in the water storage container, that is, the entire dissolved oxygen measurement process is in a closed space, avoiding the exposure of the electrode to the air, making the dissolved oxygen detection process meet the standard measurement requirements. In addition, during the above measurement process, there is no need to repeatedly insert and remove the electrode. Sampling can be achieved by extending the free end of the flexible water inlet pipe into the water with the dissolved oxygen to be measured, avoiding pulling on the electrode and the connecting wire between the electrode and the dissolved oxygen measuring body, thereby improving the accuracy of the electrode detection result and extending the service life of the electrode. Moreover, the flexible water inlet pipe is wound around the wire reel. When long-distance sampling is required, the free end of the flexible water inlet pipe can be pulled out until it can extend into the water with the dissolved oxygen to be measured. That is to say, this application can be applied to long-distance sampling, making its applicability relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the dissolved oxygen measuring device provided by an embodiment of the present application;

[0027] Figure 2 It is a schematic structural diagram of the dissolved oxygen measuring device provided by another embodiment of the present application;

[0028] Figure 3 For an embodiment of the present application Figure 2 front view of the dissolved oxygen measuring device;

[0029] Figure 4 It is a schematic structural diagram of a wire reel arranged in the accommodation box and the flexible water inlet pipe wound around the wire reel provided by an embodiment of the present application.

[0030] In the figure: 100 is the dissolved oxygen measurement body; 101 is the connection line; 1011 is the electrode; 200 is the water storage container; 201 is the first through hole; 202 is the drain pipe; 2021 is the stop valve; 203 is the support column; 2031 is the support base; 204 is the first top cover; 205 is the visual observation window; 300 is the water pump; 301 is the flexible water inlet pipe; 3011 is the gravity ball; 302 is the water outlet pipe; 3021 is the right-angle pipe; 400 is the storage box; 401 is the wire winding wheel; 402 is the second through hole; 403 is the second top cover; 500 is the magnetic stirring assembly; 501 is the magnetic stirrer; 502 is the magnet. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts also belong to the scope of protection of the present application.

[0032] Refer to Figures 1 to 4 , the present application provides a dissolved oxygen measurement device, including:

[0033] The dissolved oxygen measurement body 100 is electrically connected to the electrode 1011 through the connection line 101; wherein, the dissolved oxygen measurement body 100 can be a dissolved oxygen tester, and its specific specifications and models can be set according to actual needs, and the present application does not make specific limitations thereto herein.

[0034] The water storage container 200 has a first through hole 201 at the top for the electrode 1011 to extend into it, and a drain pipe 202 is connected to the bottom of the water storage container 200, and a stop valve 2021 is provided on the drain pipe 202; wherein, in order to ensure the sealing between the electrode 1011 and the first through hole 201 and avoid abrasion of the electrode 1011 during the process of inserting the electrode 1011 into the water storage container 200 through the first through hole 201, a sealing ring is provided on the inner peripheral wall of the first through hole 201, and the sealing ring can be made of rubber or silica gel.

[0035] The water pump 300 has a flexible water inlet pipe 301 and a water outlet pipe 302 connected to its water inlet and water outlet respectively, and the end of the water outlet pipe 302 away from the water pump 300 is connected to the side wall of the water storage container 200; wherein, the water pump 300 provides the power for the water sample to flow in the flexible water inlet pipe 301 and the water outlet pipe 302, and its specifications and models can be set according to actual needs, and the present application does not make specific limitations thereto herein.

[0036] Storage box 400, a wire winding wheel 401 is rotatably arranged inside the storage box 400. The free end of the flexible water inlet pipe 301 sequentially penetrates through the storage box 400, is wound around the wire winding wheel 401 and then penetrates through the storage box 400 to immerse in the water to be measured for dissolved oxygen. Wherein, the length of the flexible water inlet pipe 301 can be set according to actual needs. The storage box 400 can be used to protect the flexible water inlet pipe 301, and the arrangement of the wire winding wheel 401 facilitates the storage of the flexible water inlet pipe 301, enabling the flexible water inlet pipe 301 with a longer length to be wound, which is convenient for sampling the water to be measured for dissolved oxygen at a farther distance.

[0037] For the dissolved oxygen measuring device provided in this application, the electrode 1011 electrically connected to the dissolved oxygen measuring body 100 through the connection wire 101 is inserted into the water storage container 200. Then, the free end of the flexible water inlet pipe 301 is pulled out from the storage box 400 and extended into the water to be measured for dissolved oxygen. The water pump 300 is turned on so that the water to be measured for dissolved oxygen enters the water storage container 200 through the flexible water inlet pipe 301, the water pump 300 and the water outlet pipe 302. The dissolved oxygen measuring body 100 is turned on to measure the dissolved oxygen in the water in the water storage container 200. When it is necessary to measure the dissolved oxygen of another sample, the cut-off valve 2021 is opened to drain the water that has been measured in the water storage container 200 through the drain pipe 202 outside the water storage container 200. Then, the above process is repeated to pump the next water to be measured for dissolved oxygen into the water storage container 200. During the above process of measuring dissolved oxygen, the electrode 1011 is always in the water storage container 200, that is, the entire process of measuring dissolved oxygen is in a closed space, avoiding the electrode 1011 being exposed to the air, making the detection process of dissolved oxygen meet the standard measurement requirements. In addition, during the above measurement process, there is no need to repeatedly insert and remove the electrode 1011. Sampling can be achieved by extending the free end of the flexible water inlet pipe 301 into the water to be measured for dissolved oxygen, avoiding pulling on the electrode 1011 and the connection wire 101 between the electrode 1011 and the dissolved oxygen measuring body 100, thereby improving the accuracy of the detection result of the electrode 1011 and extending the service life of the electrode 1011. Moreover, the flexible water inlet pipe 301 is wound around the wire winding wheel 401. When it is necessary to sample at a long distance, the free end of the flexible water inlet pipe 301 is pulled out until it can extend into the water to be measured for dissolved oxygen. That is to say, this application can be applied to long-distance sampling, making its applicability relatively high.

[0038] In some embodiments, referring to Figures 1 to 3 , the dissolved oxygen measuring device in this application further includes a magnetic stirring assembly 500; wherein, the magnetic stirring assembly 500 is used to magnetically stir the water sample to be measured for dissolved oxygen placed in the water storage container 200, so as to ensure the uniformity of the water sample to be measured for dissolved oxygen, making the measurement result of the dissolved oxygen in the water sample to be measured for dissolved oxygen more accurate.

[0039] In addition, the magnetic stirring assembly 500 includes a magnetic stirrer 501 and a magnet 502. Specifically, support columns 203 are provided at the bottom of the water storage container 200, a support base 2031 is provided at the bottom end of the support column 203, the lower surface of the support base 2031 is disposed on the upper surface of the magnetic stirrer 501, and the magnet 502 is disposed inside the water storage container 200. Among them, the specifications and models of the magnetic stirrer 501 can be selected according to actual needs, and the present application does not specifically limit it here. When the magnetic stirrer 501 is turned on, the magnetic stirrer 501 drives the magnet to rotate through a motor, and at the same time generates a rotating magnetic field inside the water storage container 200. This magnetic field will push the magnetic magnet 502 placed in the water storage container 200 to perform a circular operation, so as to achieve the purpose of stirring the water sample of the dissolved oxygen to be measured in the water storage container 200, making the uniformity of the water sample of the dissolved oxygen to be measured higher. The setting of the support base 2031 increases the contact area between the water storage container 200 and the upper surface of the magnetic stirrer 501, making the water storage container 200 placed on the magnetic stirrer 501 more stable.

[0040] To ensure that the water sample of the dissolved oxygen measured in the water storage container 200 can be smoothly discharged, the drain pipe 202 is in an L shape. The top end of the drain pipe 202 is connected to the bottom of the water storage container 200 and its height is less than the height of the support column 203, which is convenient for setting the drain pipe 202 and timely discharging the water sample that has been measured in the water storage container 200.

[0041] In some embodiments, referring to Figure 2 , one end of the water outlet pipe 302 communicating with the water storage container 200 is connected to a right-angle pipe 3021 located inside the water storage container 200, and the end of the right-angle pipe 3021 away from the water outlet pipe 302 is vertically oriented towards the inner bottom surface of the water storage container 200.

[0042] In the above embodiment, the setting of the right-angle pipe 3021 enables the water sample of the dissolved oxygen to be measured flowing into the right-angle pipe 3021 through the flexible water inlet pipe 301 and the water outlet pipe 302 in sequence to flow vertically into the water storage container 200, avoiding the water sample of the dissolved oxygen to be measured from spraying onto the electrode 1011 and causing impact on the electrode 1011, etc., thus ensuring the accuracy of the electrode detection result.

[0043] In some embodiments, the bottom end of the electrode 1011 in the present application penetrates through the first through hole 201 and extends into the water storage container 200 and is at a first preset distance from the inner bottom surface of the water storage container 200. Among them, the setting of the first preset distance avoids the bottom end of the electrode 1011 from abutting against the inner bottom surface of the water storage container 200 and causing damage to the electrode 1011, thus ensuring the service life of the electrode 1011. The first preset distance can be set according to actual needs. Therefore, the present application does not specifically limit it here.

[0044] In addition, the end of the right-angle pipe 3021 away from the water outlet pipe 302 is at a second preset distance from the inner bottom surface of the water storage container 200; the second preset distance allows water at a certain liquid level to be introduced into the water storage container 200 through the flexible water inlet pipe 301, the water outlet pipe 302, and the right-angle pipe 3021, while ensuring that the water in the water storage container 200 will not enter the right-angle pipe 3021 again through the bottom end of the right-angle pipe 3021 due to a high liquid level.

[0045] Wherein, the second preset distance is greater than the first preset distance, so as to ensure that when the bottom end of the electrode 1011 is immersed below the liquid level of the dissolved oxygen to be measured in the water storage container 200, the bottom end of the right-angle pipe 3021 is above the liquid level in the water storage container 200. This not only ensures that the electrode 1011 measures the water sample of the dissolved oxygen to be measured, but also avoids the bottom end of the right-angle pipe 3021 being immersed below the liquid level in the water storage container 200, preventing the water sample in the water storage container 200 from entering the right-angle pipe 3021 again through the bottom end of the right-angle pipe 3021 and ensuring the accuracy of the detection result.

[0046] In some embodiments, referring to Figures 1 to 3 , a first top cover 204 is hermetically arranged on the top of the water storage container 200 in this application, and a first through hole 201 is opened in the middle of the first top cover 204. The setting of the first top cover 204 facilitates flushing the inside of the water storage container 200 and facilitates removing the first top cover 204 to flush the electrode 1011 inserted into the first through hole 201 of the first top cover 204.

[0047] In some embodiments, referring to Figures 1 to 4 , second through holes 402 matching the flexible water inlet pipe 301 are opened on opposite side walls of the storage box 400 in this application, and a second top cover 403 is hinged to the top of the storage box 400. Among them, the second through holes 402 facilitate the free end of the flexible water inlet pipe 301 to extend out of the storage box 400 and then into the water sample of the dissolved oxygen to be measured, and the setting of the second top cover 403 facilitates opening it and winding the flexible water inlet pipe 301 around the wire winding wheel 401. That is, the setting of the second top cover 403 makes the installation of the wire winding wheel 401 and the flexible water inlet pipe 301 more convenient.

[0048] In some embodiments, referring to Figures 1 to 3 , a gravity ball 3011 is arranged at the free end of the flexible water inlet pipe 301 in this application. Among them, the setting of the gravity ball 3011 enables the free end of the flexible water inlet pipe 301 to always be below the liquid level of the water sample of the dissolved oxygen to be measured, ensuring the continuity of the sampling process and improving the sampling efficiency.

[0049] In some embodiments, referring to Figure 2 and Figure 3, a visual observation window 205 is provided on the side wall of the water storage container 200 in the present application.

[0050] In the above embodiment, the setting of the visual observation window 205 facilitates the observation of the liquid level in the water storage container 200, enabling the determination of the dissolved oxygen in the water sample of the dissolved oxygen to be measured in the water storage container 200, and ensuring the measurement efficiency of the dissolved oxygen.

[0051] In some embodiments, the flexible water inlet pipe 301 in the present application is an armored rubber hose. Among them, the armored rubber hose has the advantages of wear resistance, heat insulation, and heat protection, etc., so that its service life is longer during the process of transporting the water sample of the dissolved oxygen to be measured, and it can be wound, which is convenient for experimental operation.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A dissolved oxygen measuring device, characterized in that, Comprising: A dissolved oxygen measurement body (100), which is electrically connected to an electrode (1011) through a connecting wire (101); A water storage container (200), the top of the water storage container (200) is provided with a first through hole (201) for the electrode (1011) to extend into it, and its bottom is communicated with a drain pipe (202), and a stop valve (2021) is arranged on the drain pipe (202); A water pump (300), the water inlet and outlet of the water pump (300) are respectively communicated with a flexible water inlet pipe (301) and a water outlet pipe (302), and the end of the water outlet pipe (302) far from the water pump (300) is communicated with the side wall of the water storage container (200); A storage box (400), a winding wheel (401) is rotatably arranged in the storage box (400), the free end of the flexible water inlet pipe (301) sequentially passes through the storage box (400) and then winds around the winding wheel (401) and passes through the storage box (400) to immerse in the water with dissolved oxygen to be measured.

2. The dissolved oxygen measuring device according to claim 1, wherein The dissolved oxygen measuring device further includes a magnetic stirring assembly (500); The magnetic stirring assembly (500) includes a magnetic stirrer (501) and a magnet (502); The bottom of the water storage container (200) is provided with a support column (203), the bottom end of the support column (203) is provided with a support base (2031), the lower surface of the support base (2031) is arranged on the upper surface of the magnetic stirrer (501), and the magnet (502) is arranged in the water storage container (200); The drain pipe (202) is in an L shape, the top end of the drain pipe (202) is communicated with the bottom of the water storage container (200), and its height is less than the height of the support column (203).

3. The dissolved oxygen measuring device according to claim 1, characterized in that, The end of the water outlet pipe (302) communicated with the water storage container (200) is communicated with a right-angle pipe (3021) located in the water storage container (200), and the end of the right-angle pipe (3021) far from the water outlet pipe (302) is vertically directed towards the inner bottom surface of the water storage container (200).

4. The dissolved oxygen measuring device according to claim 3, characterized in that, The bottom end of the electrode (1011) passes through the first through hole (201) and extends into the water storage container (200) and is at a first preset distance from the inner bottom surface of the water storage container (200); The end of the right-angle pipe (3021) far from the water outlet pipe (302) is at a second preset distance from the inner bottom surface of the water storage container (200); Wherein, the second preset distance is greater than the first preset distance.

5. The dissolved oxygen measuring device according to claim 1, characterized in that, The top of the water storage container (200) is hermetically provided with a first top cover (204), and the first through hole (201) is opened in the middle of the first top cover (204).

6. The dissolved oxygen measuring device according to claim 1, characterized in that, Second through holes (402) matching the flexible water inlet pipe (301) are opened on the opposite side walls of the storage box (400), and a second top cover (403) is hinged to the top of the storage box (400).

7. The dissolved oxygen measuring device according to claim 6, characterized in that, The free end of the flexible water inlet pipe (301) is provided with a gravity ball (3011).

8. The dissolved oxygen measuring device according to any one of claims 1 to 7, characterized in that, A visual observation window (205) is provided on the side wall of the water storage container (200).

9. The dissolved oxygen measuring device according to any one of claims 1 to 7, characterized in that, The flexible water inlet pipe (301) is an armored rubber hose.

Images