Dissolved oxygen test auxiliary device

Abstract

The utility model belongs to the technical field of liquid sampling and detecting devices, and relates to a dissolved oxygen testing auxiliary device which comprises a dissolved oxygen testing probe, a collecting box and a stirring device, the collecting box is internally divided into a slow flow area and a detecting area through a filter plate, a sealing top is detachably installed on the top of the collecting box, and the dissolved oxygen testing probe penetrates through the sealing top and is located in the detecting area. The stirring device is located in the detection area, a second drain opening is formed in the detection area, and a water inlet and a first drain opening are formed in the slow flow area. The flow speed of water flow is buffered through the slow flow area, the water flow is more stable, bubbles are reduced, a dissolved oxygen test probe can more accurately detect the content of dissolved oxygen in water, a water sample in the detection area is more uniform through stirring, detection errors caused by non-uniformity of the water sample are avoided, and the detection accuracy is improved. The accuracy of the dissolved oxygen test is further improved, and the first drain opening and the second drain opening are respectively used for discharging water samples in the slow flow area and the detection area.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid sampling and detection devices, and in particular to an auxiliary device for dissolved oxygen testing. Background Technology

[0002] A dissolved oxygen analyzer is a wastewater treatment testing device. The principle of dissolved oxygen analysis is the solubility of oxygen in water, which depends on temperature, pressure, and dissolved salts in the water. Dissolved oxygen analyzers come in small handheld and large benchtop models. Different dissolved oxygen analyzers can be used for different environments. Insert the membrane cap at the lower end of the electrode head into the beaker and contact the wastewater sample, then wait for the test results.

[0003] However, water samples need to be collected before oxygen content testing. However, existing sampling devices are prone to getting debris in the water, and because the water sample flow rate at the sampling point is too fast and unstable, large air bubbles may be mixed in the water flow, affecting the detection of the dissolved oxygen meter probe. Utility Model Content

[0004] To address the inconvenience of sampling with existing auxiliary sampling devices, this invention provides an auxiliary device for dissolved oxygen testing.

[0005] The technical solution of this utility model is achieved through the following scheme: a dissolved oxygen testing auxiliary device, including a dissolved oxygen testing probe, a collection box and a stirring device, wherein the collection box cavity is divided into a slow flow zone and a detection zone by a filter plate, the top of the collection box is detachably installed with a cap, the dissolved oxygen testing probe penetrates the cap and is located in the detection zone, the stirring device is located in the detection zone, a second drain is opened in the detection zone, and a water inlet and a first drain are opened in the slow flow zone.

[0006] Through the above technical solutions, the water flow velocity is buffered by the slow flow zone, making the water flow more stable and reducing the generation of bubbles. This helps the dissolved oxygen test probe to more accurately detect the dissolved oxygen content in the water. The agitation makes the water sample in the detection zone more uniform, avoiding detection errors caused by uneven water sample, and further improving the accuracy of dissolved oxygen testing. The first drain and the second drain are used to discharge the water samples in the slow flow zone and the detection zone, respectively.

[0007] Preferably, a slow-flow slope is provided in the slow-flow zone, the top surface of the slow-flow slope is screwed to one end of the filter plate, the other end of the filter plate abuts against the collection box, and a first drainage slope is provided at the end of the slow-flow slope near the water inlet, the first drainage slope is connected to the first drainage outlet.

[0008] Preferably, the water inlet is connected to an external pump body, the pump body is equipped with a liquid-drawing hose, the liquid-drawing end of the liquid-drawing hose is equipped with a water-drawing filter head, and the water-drawing filter head is equipped with a counterweight.

[0009] Through the above technical solutions, the slow-flow slope can guide and buffer the water flow entering from the inlet, making the water flow more smoothly towards the filter plate, reducing bubbles and turbulence caused by water flow impact, which is conducive to improving the accuracy of dissolved oxygen testing. It allows the sample liquid to slowly overflow from the filter plate, filtering out bubbles and impurities. The water pumping filter head can effectively filter out larger impurities in the water sample, preventing impurities from entering the collection box and affecting the test results. It also protects the pump body and the pumping hose from blockage and damage by impurities. The counterweight blocks keep the water pumping filter head in a stable position in the water, avoiding the water pumping filter head from shifting or floating due to water flow impact or buoyancy.

[0010] Preferably, the detection area is provided with a flow-shifting slope, which is backed by a slow-flow zone. A second drainage slope is provided at one end of the flow-shifting slope near the second drainage outlet, and the second drainage slope is connected to the second drainage outlet. The other end of the flow-shifting slope is connected to a filter plate.

[0011] Preferably, the agitation device includes a first agitator and a second agitator, the first agitator being installed on the top, the stirring end of the first agitator being located above the flow slope, and the second agitator being located above the filter plate.

[0012] Through the above technical solutions, the flow slope backs onto the slow-flow zone to guide the water sample filtered by the filter plate into the detection zone more smoothly and steadily, avoiding the impact of height difference that causes bubbles and damage to the device. The differentiated agitation design above the flow slope and above the filter plate, through the vertical agitation of the first agitator and the horizontal directional push of the second agitator, eliminates the velocity discontinuity in the transition zone from the flow slope to the filter plate.

[0013] Preferably, the cap is provided with a handle, and a probe clip is attached to the handle. The dissolved oxygen test probe is fixedly installed on the cap by the probe clip, and an observation hole is opened on the cap.

[0014] With the above technical solution, the probe clips are secured at both ends, ensuring the stable installation of the dissolved oxygen test probe while also allowing for quick disassembly and storage.

[0015] In summary, this utility model has the following beneficial effects:

[0016] 1. This utility model uses a slow-flow zone to buffer the water flow velocity, making the water flow more stable and reducing the generation of bubbles. This helps the dissolved oxygen test probe to more accurately detect the dissolved oxygen content in the water. The stirring makes the water sample in the detection zone more uniform, avoiding detection errors caused by uneven water sample, and further improving the accuracy of dissolved oxygen testing. The first drain and the second drain are used to discharge the water sample in the slow-flow zone and the detection zone, respectively.

[0017] 2. The gentle flow slope guides and buffers the water flow entering from the inlet, making the water flow more smoothly towards the filter plate, reducing bubbles and turbulence caused by water flow impact, which helps improve the accuracy of dissolved oxygen testing. It also allows the sample liquid to slowly overflow from the filter plate, filtering out bubbles and impurities. The water pump head can effectively filter out larger impurities in the water sample, preventing impurities from entering the collection box and affecting the test results. It also protects the pump body and the pumping hose from blockage and damage by impurities. The counterweight keeps the water pump head in a stable position in the water, avoiding displacement or floating of the water pump head due to water flow impact or buoyancy.

[0018] 3. The flow slope backs onto the slow-flow zone to guide the water sample filtered by the filter plate into the detection zone more smoothly and steadily, avoiding the impact of height difference that causes bubbles and damage to the device. The differentiated agitation design above the flow slope and above the filter plate, through the vertical agitation of the first agitator and the horizontal directional push of the second agitator, eliminates the velocity gap in the transition zone from the flow slope to the filter plate.

[0019] 4. The probe clips are secured at both ends, ensuring a stable installation of the dissolved oxygen test probe while also allowing for quick disassembly and storage. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram from the main perspective of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0022] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A;

[0023] Figure 4 This is a three-dimensional structural diagram of the data collection box of this utility model;

[0024] Figure 5 This is a schematic diagram of the rear view structure of this utility model.

[0025] Explanation of reference numerals in the attached diagram: 1. Dissolved oxygen test probe; 2. Data collection box; 21. Slow flow zone; 211. Slow flow slope; 22. Detection zone; 221. Flow slope; 3. Agitator; 31. First agitator; 32. Second agitator; 4. Filter plate; 5. Inlet; 51. Liquid extraction hose; 52. Counterweight; 53. Water extraction filter head; 6. First drain outlet; 7. Second drain outlet; 8. Top; 9. Probe clip. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification. The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] A dissolved oxygen testing auxiliary device, such as Figures 1-5 As shown, the device includes a dissolved oxygen test probe 1, a collection box 2, and a stirring device 3. The collection box 2 is divided into a slow-flow zone 21 and a detection zone 22 by a filter plate 4. A cap 8 is detachably installed on the top of the collection box 2. The dissolved oxygen test probe 1 passes through the cap 8 and is located in the detection zone 22. The stirring device 3 is located in the detection zone 22. A second drain 7 is opened in the detection zone 22. An inlet 5 and a first drain 6 are opened in the slow-flow zone 21. The slow-flow zone 21 and the detection zone 22 are set back to back. The slow-flow zone 21 slows down the water drawn in by the inlet 5 and makes it flow slowly into the detection zone 22, avoiding water disturbance (such as bubbles and particles) from directly interfering with the probe. The filter plate 4 can intercept particles and act as a "bubble buffer layer". The slow-flow zone 21 effectively attenuates turbulent energy and reduces the bubble residual rate. The stirring device 3 slowly stirs the sample to keep it in a flowing state, ensuring the accuracy of the dissolved oxygen test probe 1 in the measurement value. Drain valves are provided on the first drain 6 and the second drain 7.

[0029] like Figure 2 As shown, one end of the cap 8 has a plug-in block, and the collection box 2 has a slot that matches the plug-in block. The other end of the cap 8 is placed on the slot of the collection box 2L and fixed with bolts. The cap 8 has an observation hole. The through hole through which the dissolved oxygen test probe 1 penetrates the cap 8 is the observation hole. When the dissolved oxygen test probe 1 is not inserted, the sample liquid in the detection area 22 can be observed to determine whether there is a suitable sample liquid.

[0030] like Figure 1 As shown, the probe clip 9 is attached to the handle. The dissolved oxygen test probe 1 is fixedly installed on the cap 8 by the probe clip 9. The probe clip 9 consists of a telescopic rod and two clips set at the fixed end and the telescopic end of the telescopic rod. The fixed end clip is adapted to the two handles on the cap 8, and the telescopic end clip is adapted to the dissolved oxygen test probe 1. The probe clip 9 fixes the dissolved oxygen test probe 1 in a suitable position to detect the dissolved oxygen concentration. The dissolved oxygen test probe 1 is firmly fixed to the top of the equipment through physical constraint to avoid displacement caused by equipment vibration or water flow impact. The clips that attach the dissolved oxygen test probe 1 are preferably made of elastic rubber or silicone, which ensures stability and avoids damage to the probe surface.

[0031] like Figure 2 and Figure 4As shown, a slow-flow slope 211 is provided in the slow-flow zone 21. The top surface of the slow-flow slope 211 is screwed to one end of the filter plate 4, and the other end of the filter plate 4 abuts against the collection box 2. A first drainage slope is provided at the end of the slow-flow slope 211 near the water inlet 5. The first drainage slope is connected to the first drainage outlet 6. The slow-flow slope 211 is semi-circular in shape, which guides the water flow to transition smoothly along the circumferential tangent direction and reduces the excessive impact of the sample liquid drawn by the pump on the filter plate 4. The filter plate 4 is rigidly fixed to the top surface of the slow-flow slope 211 by multiple bolts. The non-slope surface is right angled. The non-slope surface of the slow-flow slope 211 abuts against the right angled non-slope surface of the flow slope 221 in the detection zone 22. The first drainage slope and the second drainage slope both have a slope of 5%, which facilitates the diversion of water during drainage.

[0032] like Figure 1 As shown, the inlet 5 is connected to an external pump body, on which a suction hose 51 is installed. A suction filter head 53 is installed at the suction end of the suction hose 51. A counterweight 52 is installed on the suction filter head 53 to enhance anti-interference and suppress hose swaying. The suction filter head 53 integrates a conical guide shroud to narrow the water inlet, reduce sudden changes in flow velocity, and avoid shaking. The suction depth is controlled by adjusting the mass of the counterweight 52. In conjunction with the suction filter head 53 with a filter screen, large particles of impurities are removed for preliminary filtration, and secondary filtration is performed by the filter plate 4 inside the collection box 2 to reduce the influence of particles in the water on the probe.

[0033] like Figure 4 As shown, a flow-shifting slope 221 is provided in the detection zone 22. The flow-shifting slope 221 is backed by the slow-flow zone 21. A second discharge slope is provided at one end of the flow-shifting slope 221 near the second discharge port 7. The second discharge slope is connected to the second discharge port 7. The other end of the flow-shifting slope 221 is connected to the filter plate 4. The flow-shifting slope 221 adopts a parabolic curved surface that is complementary to the slow-flowing slope 211. It further guides the laminar flow output from the slow-flow zone 21 to the center of the detection zone 22 (probe position), reduces the height difference change of the water flow during the flow process, and makes the water flow smoothly transition to the center of the detection zone 22. This reduces the possibility of generating bubbles due to the impact of height difference and forms a uniform flow field.

[0034] like Figure 3 As shown, the end of the filter plate 4 that is screwed to the slow flow slope 211 is arc-shaped and slightly protrudes from the top surface of the slow flow slope 211. The top end of the flow transfer slope 221 has a stepped structure, which completely seals the space protruding from the filter plate 4 and forms a "maze-like" sealed path with the arc end of the filter plate 4 to avoid seepage channels.

[0035] like Figure 2As shown, the agitation device 3 includes a first agitator 31 and a second agitator 32. Both the first agitator 31 and the second agitator 32 operate at a slow speed to avoid water stratification disruption or localized turbulence caused by excessive flow velocity. The first agitator 31 is installed on the cap 8, with its stirring end located above the flow slope 221. The second agitator 32 is located above the filter plate 4. The impeller blades are designed with swept-back curved surfaces to generate a spiral flow field that mixes axial and radial flow, allowing the water to circulate slowly at a velocity of 0.1-0.3 m / s. This ensures water renewal on the probe surface while preventing the introduction of air bubbles due to violent disturbance. The first agitator 31 is vertically positioned, and the second agitator 32 is horizontally positioned. The stirring fan 32 slowly pushes the liquid overflowing in the slow flow zone 21, forming a horizontal water flow. This forms a three-dimensional circulation network with the vertical circulation of the first stirring fan 31, preventing dead zones in the detection zone 22. The first stirring fan 31 stirs the liquid in the detection zone 22. The second stirring fan 32 is installed on the side wall of the collection box 2 to keep it flowing. The motor of the first stirring fan 31 is supported by a support frame, which is fixedly installed on the top. The rotating rod of the first stirring fan 31 passes through the top 8 and extends to the top of the flow slope 221. The motor of the second stirring fan 32 is installed on the outer side wall of the collection box 2. The rotating rod of the second stirring fan 32 passes through the collection box and is horizontally mounted above the filter plate 4.

[0036] All parts and equipment use conventional models in the existing technology, and the circuit connection uses conventional connection methods in the existing technology, which will not be described in detail here. The contents not described in detail in this specification are existing technologies known to those skilled in the art. The dissolved oxygen test probe 1 is the electrode head of the dissolved oxygen tester described in the background technology.

[0037] Working principle: Adjust the counterweight 52 to place the suction hose 51 into the liquid to be tested, start the water pump to extract the sample liquid. When the liquid enters, it is slowed down by the slow flow slope 211 and filtered twice by the filter plate 4 to eliminate air bubbles. The overflowing sample liquid is pushed by the second stirring fan 32 for initial stirring. At this time, the sample liquid overflowing from the slow flow zone 21 enters the detection zone 22. The water flows into the detection zone 22 through the flow slope 221. The sample liquid in the detection zone 22 is observed through the observation hole. After a suitable sample liquid is present, the pump is turned off, the dissolved oxygen test probe 1 is inserted into the observation hole and locked by the probe clip 9, and the first stirring fan 31 slowly stirs the sample liquid to keep it in a small-amplitude flow state. Wait for the test results.

[0038] When the test is completed and the water is drained, open the drain valves of the two drain outlets to drain the water, and use the two drainage slopes to guide the flow and completely remove the sample liquid. Simply open the top cap 8 to clean the collection box 2 or replace the filter plate 4 to complete the maintenance and repair.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A dissolved oxygen testing auxiliary device, characterized in that: The device includes a dissolved oxygen test probe (1), a collection box (2), and a stirring device (3). The collection box (2) is divided into a slow flow zone (21) and a detection zone (22) by a filter plate (4). The top of the collection box (2) is detachably equipped with a cap (8). The dissolved oxygen test probe (1) passes through the cap (8) and is located in the detection zone (22). The stirring device (3) is located in the detection zone (22). A second drain (7) is opened in the detection zone (22). An inlet (5) and a first drain (6) are opened in the slow flow zone (21).

2. The dissolved oxygen testing auxiliary device according to claim 1, characterized in that: The slow-flow zone (21) is provided with a slow-flow slope (211). The top surface of the slow-flow slope (211) is screwed to one end of the filter plate (4). The other end of the filter plate (4) abuts against the collection box (2). The end of the slow-flow slope (211) near the water inlet (5) is provided with a first drainage slope. The first drainage slope is connected to the first drainage outlet (6).

3. The dissolved oxygen testing auxiliary device according to claim 2, characterized in that: The inlet (5) is connected to an external pump body, and a liquid-drawing hose (51) is installed on the pump body. A water-drawing filter head (53) is installed at the liquid-drawing end of the liquid-drawing hose (51), and a counterweight (52) is installed on the water-drawing filter head (53).

4. The dissolved oxygen testing auxiliary device according to claim 1, characterized in that: The detection area (22) is provided with a flow slope (221), which is backed by the slow flow area (21). The end of the flow slope (221) near the second discharge port (7) is provided with a second discharge slope, which is connected to the second discharge port (7). The other end of the flow slope (221) is connected to the filter plate (4).

5. The dissolved oxygen testing auxiliary device according to claim 4, characterized in that: The stirring device (3) includes a first stirring fan (31) and a second stirring fan (32). The first stirring fan (31) is installed on the cap (8). The stirring end of the first stirring fan (31) is located above the flow slope (221). The second stirring fan (32) is located above the filter plate (4).

6. The dissolved oxygen testing auxiliary device according to claim 1, characterized in that: The cap (8) is provided with a handle, and a probe buckle (9) is attached to the handle. The dissolved oxygen test probe (1) is fixedly installed on the cap (8) through the probe buckle (9). An observation hole is opened on the cap (8).

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