A device for measuring dissolved oxygen in a water sample

Abstract

The utility model relates to dissolving oxygen device technical field, and disclose a kind of dissolved oxygen device in water sample determination, including dissolved oxygen measuring instrument main part, the side of dissolved oxygen measuring instrument main part is provided with measuring probe, the bottom of measuring probe is provided with measuring membrane head, the outside of measuring membrane head is provided with membrane head cleaning assembly, the utility model is provided with membrane head cleaning assembly outside measuring membrane head, wherein the cleaning sleeve in membrane head cleaning assembly is sleeved outside measuring membrane head, the inside of liquid inlet cavity in cleaning sleeve can be communicated with infusion hose by liquid inlet joint, so that the cleaning fluid in storage tube is extruded into liquid inlet cavity, and is sprayed on the surface of measuring membrane head by cleaning spray hole, the surface of measuring membrane head is cleaned quickly, the impurity, oil dirt is washed, avoid impurity, oil dirt adhere on the surface of measuring membrane head condensation, the use of measuring membrane head plays good protection effect, and subsequent water sample detection continuous use is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of dissolved oxygen devices, specifically a device for measuring dissolved oxygen in water samples. Background Technology

[0002] In many fields such as water quality monitoring, aquaculture, environmental science research, and sewage treatment, dissolved oxygen meters play an irreplaceable role as key equipment for measuring dissolved oxygen content in water bodies. With the development of technology, although existing dissolved oxygen meters have made certain progress in measurement principles and functions, many problems that urgently need to be solved have still been exposed in actual use.

[0003] A search revealed that Chinese Patent Publication No. CN 222671689 U discloses a device for determining dissolved oxygen in water samples. The device includes a measuring cylinder with a first stopcock (a three-way stopcock) installed at its top. An outlet pipe and a colorimetric reagent inlet pipe are fixedly installed at the top of the measuring cylinder. The original reagent dispenser is improved to a three-way valve, and the first stopcock controls the flow of each pipe, thus obtaining the test results. This separates the colorimetric reagent inlet and the sample outlet, preventing the sample and colorimetric reagent from mixing and thus avoiding deviations. Furthermore, a flow guide is provided, with several guide vanes installed inside. When water flows through, it forms a vortex, allowing the water to better flush the inner wall, thereby cleaning the cylinder wall and preventing deviations.

[0004] The dissolved oxygen device in the aforementioned patent still has certain shortcomings. Because dissolved oxygen meters are easily affected by environmental factors during actual use, most of the existing dissolved oxygen meters are used outdoors when measuring the oxygen content in water. As a result, some impurities or oil stains in the water can easily adhere to the sensor membrane head of the dissolved oxygen meter. If these are not removed in a timely and effective manner, the oil stains or impurities will condense on the surface of the membrane head, making subsequent cleaning difficult and even damaging the normal use of the membrane head. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a device for measuring dissolved oxygen in water samples. It solves the problem that existing dissolved oxygen meters are mostly used outdoors, and the sensor membrane head of the dissolved oxygen meter is prone to adhering to impurities or oil from the water. If these impurities are not removed in a timely and effective manner, they will condense on the surface of the membrane head, making subsequent cleaning difficult and even damaging the membrane head for normal use.

[0006] This utility model provides the following technical solution: a device for measuring dissolved oxygen in a water sample, including a dissolved oxygen measuring instrument body, a measuring probe is provided on the side of the dissolved oxygen measuring instrument body, the dissolved oxygen measuring instrument body and the measuring probe are connected by a connecting line, a measuring membrane head is provided at the bottom of the measuring probe, and a membrane head cleaning component is provided on the outside of the measuring membrane head;

[0007] The membrane head cleaning assembly includes a connecting collar fitted onto the bottom of the measuring probe. Two fixing slots are symmetrically arranged on both sides of the connecting collar. Fastening screw holes are provided on the sides of the fixing slots, and fastening bolts are inserted into the fastening screw holes. A cleaning sleeve is provided at the bottom of the connecting collar. An inlet cavity is provided on the inner wall of the cleaning sleeve. Several cleaning spray holes are evenly distributed on the inner wall of the inlet cavity. The cleaning sleeve is fitted onto the measuring membrane head. A top connecting ring is fixed to the top of the cleaning sleeve. Two fixing plates are symmetrically arranged on both sides of the top of the top connecting ring. The fixing plates are inserted into the fixing slots. An inlet connector is provided on the side of the cleaning sleeve.

[0008] Preferred technical solution 1: A liquid storage tube is fixed to the side of the main body of the dissolved oxygen measuring instrument, a push rod is inserted into the liquid storage tube, a piston head is provided in the liquid storage tube, and the bottom end of the push rod is fixedly connected to the piston head.

[0009] Preferred technical solution 2: The bottom end of the liquid storage tube is connected to an infusion hose, and a valve is installed on the infusion hose.

[0010] Preferred technical solution 3: The middle part of the cleaning sleeve is hollow.

[0011] This design allows the cleaning sleeve to be better fitted onto the outside of the measuring membrane head.

[0012] Preferred technical solution four: The fixing plate is in the shape of an arc that matches the fixing slot.

[0013] This solution makes the connection between the fixed insert plate and the connecting collar more convenient.

[0014] Preferred technical solution five: A connecting block is provided at the top of the push rod.

[0015] This solution makes it easier for users to press the push rod.

[0016] Compared with the prior art, this utility model provides a device for measuring dissolved oxygen in water samples, which has the following beneficial effects:

[0017] (1) This utility model provides a membrane head cleaning assembly on the outside of the measuring membrane head. The cleaning sleeve in the membrane head cleaning assembly is sleeved on the outside of the measuring membrane head. The inlet cavity of the cleaning sleeve can be connected to the infusion hose through the inlet connector, so that the cleaning liquid squeezed in the storage tube enters the inlet cavity and is sprayed on the surface of the measuring membrane head through the cleaning nozzle. This completes the rapid rinsing and cleaning of impurities and oil on the surface of the measuring membrane head, preventing impurities and oil from adhering to and condensing on the surface of the measuring membrane head. This provides good protection for the use of the measuring membrane head and facilitates continuous use for subsequent water sample testing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is an exploded view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Schematic diagram of the middle connecting collar;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of the fixed slot structure.

[0022] In the diagram: 1. Dissolved oxygen meter main body; 2. Measuring probe; 3. Connecting cable; 4. Measuring membrane head; 5. Measuring membrane head cleaning assembly;

[0023] 501. Connecting collar; 502. Fixing slot; 503. Fastening screw hole; 504. Fastening bolt; 505. Cleaning sleeve; 506. Liquid inlet cavity; 507. Cleaning nozzle; 508. Top connecting ring; 509. Fixing insert plate; 510. Liquid inlet connector; 511. Liquid storage tube; 512. Push rod; 513. Piston head; 514. Infusion hose; 515. Valve. Detailed Implementation

[0024] Please see Figure 1-4 ,

[0025] Example 1: A device for measuring dissolved oxygen in a water sample includes a dissolved oxygen measuring instrument body 1, a measuring probe 2 is provided on the side of the dissolved oxygen measuring instrument body 1, the dissolved oxygen measuring instrument body 1 and the measuring probe 2 are connected by a connecting line 3, a measuring membrane head 4 is provided at the bottom of the measuring probe 2, and a membrane head cleaning component 5 is provided on the outside of the measuring membrane head 4.

[0026] The membrane head cleaning assembly 5 includes a connecting collar 501 fitted onto the bottom of the measuring probe 2. Two fixing slots 502 are symmetrically opened on both sides of the connecting collar 501. Fastening screw holes 503 are opened on the side of the fixing slots 502. Fastening bolts 504 are inserted into the fastening screw holes 503. A cleaning sleeve 505 is provided at the bottom of the connecting collar 501. The inner wall of the cleaning sleeve 505 is provided with a liquid inlet cavity 506. A plurality of cleaning spray holes 507 are evenly opened on the inner wall of the liquid inlet cavity 506. The cleaning sleeve 505 is fitted onto the measuring membrane head 4.

[0027] A top connecting ring 508 is fixed to the top of the cleaning sleeve 505. Two fixing plates 509 are symmetrically arranged on both sides of the top of the top of the top connecting ring 508. The fixing plates 509 are inserted into the fixing slots 502. A liquid inlet connector 510 is provided on the side of the cleaning sleeve 505. A liquid storage tube 511 is fixed to the side of the dissolved oxygen measuring instrument body 1. A push rod 512 is inserted into the liquid storage tube 511. A piston head 513 is provided in the liquid storage tube 511. The bottom end of the push rod 512 is fixedly connected to the piston head 513. The bottom end of the liquid storage tube 511 is connected to an infusion hose 514. A valve 515 is provided on the infusion hose 514.

[0028] Example 2: The difference between this example and Example 1 is that the middle part of the cleaning sleeve 505 is hollow.

[0029] This allows the cleaning sleeve 505 to be better fitted onto the outside of the measuring membrane head 4.

[0030] Example 3: The difference between this example and Example 1 is that the fixing plate 509 is in the shape of an arc that matches the fixing slot 502.

[0031] This makes the connection between the fixed insert plate 509 and the connecting collar 501 more convenient.

[0032] Example 4: The difference between this example and Example 1 is that a connecting block is provided at the top of the push rod 512.

[0033] This makes it more convenient for users to press the push rod 512.

[0034] In this embodiment, since most of the existing dissolved oxygen meters are used outdoors when measuring the oxygen content in water, the sensor membrane head of the dissolved oxygen meter is prone to the adhesion of some impurities or oil from the water. If these are not removed in a timely and effective manner, the oil or impurities will condense on the surface of the membrane head, making subsequent cleaning difficult and even damaging the normal use of the membrane head.

[0035] In summary, during implementation, after the user measures the dissolved oxygen content in the water sample using the measuring membrane head 4 on the measuring probe 2, some impurities or oil stains will remain on the surface of the measuring membrane head 4. At this time, the user can place the cleaning sleeve 505 from the membrane head cleaning assembly 5 on the outside of the measuring membrane head 4, pass the fixing plate 509 through the fixing slot 502, and insert the fastening bolt 504 into the fastening screw hole 503 to abut against the side wall of the fixing plate 509, so that the cleaning sleeve 505 is stably placed on the outside of the measuring membrane head 4.

[0036] Next, the user connects to the inlet connector 510 via the infusion hose 514 connected to the bottom of the storage tube 511. A certain amount of cleaning fluid is pre-stored in the storage tube 511. By pushing the push rod 512, the user causes the push rod 512 to push out the cleaning fluid stored in the storage tube 511 through the piston head 513. The cleaning fluid is then squeezed through the infusion hose 514 into the inlet cavity 506 on the cleaning sleeve 505. The side wall of the inlet cavity 506 is evenly provided with several cleaning nozzles 507. The squeezed cleaning fluid is sprayed onto the surface of the measuring membrane head 4 through the cleaning nozzles 507, thereby rinsing and cleaning the impurities or oil stains on the surface of the measuring membrane head 4.

[0037] This method is well-suited for cleaning water samples after outdoor testing, allowing for the rapid and effective removal of impurities or oil from the surface of the measuring membrane head 4. It prevents impurities and oil from adhering to the surface of the measuring membrane head 4 and condensing into something difficult to remove, making the cleaning of the measuring membrane head 4 more timely. This facilitates the subsequent use of the measuring membrane head 4 for water sample testing and provides good protection for the measuring membrane head 4.

Claims

1. A device for determining dissolved oxygen in a water sample, comprising a dissolved oxygen measuring instrument body (1), characterized in that: The dissolved oxygen meter body (1) is provided with a measuring probe (2) on its side. The dissolved oxygen meter body (1) and the measuring probe (2) are connected by a connecting line (3). The bottom end of the measuring probe (2) is provided with a measuring membrane head (4). The outer side of the measuring membrane head (4) is provided with a membrane head cleaning component (5). The membrane head cleaning assembly (5) includes a connecting collar (501) sleeved on the bottom of the measuring probe (2). Two fixing slots (502) are symmetrically opened on both sides of the connecting collar (501). Fastening screw holes (503) are opened on the sides of the fixing slots (502). Fastening bolts (504) are inserted into the fastening screw holes (503). A cleaning sleeve (505) is provided at the bottom of the connecting collar (501). The inner wall of the cleaning sleeve (505) is provided with a liquid inlet cavity (506). The inner wall of the liquid inlet cavity (506) is evenly provided with a plurality of cleaning spray holes (507). The cleaning sleeve (505) is sleeved on the measuring membrane head (4). The top end of the cleaning sleeve (505) is fixed with a top connecting ring (508). Two fixing plates (509) are symmetrically arranged on both sides of the top end of the top connecting ring (508). The fixing plates (509) are inserted into the fixing slot (502). The side of the cleaning sleeve (505) is provided with a liquid inlet connector (510).

2. The apparatus for determining dissolved oxygen in a water sample according to claim 1, characterized in that: A liquid storage tube (511) is fixed on the side of the main body (1) of the dissolved oxygen meter. A push rod (512) is inserted into the liquid storage tube (511). A piston head (513) is provided inside the liquid storage tube (511). The bottom end of the push rod (512) is fixedly connected to the piston head (513).

3. The apparatus for determining dissolved oxygen in a water sample according to claim 2, characterized in that: The bottom end of the liquid storage tube (511) is connected to an infusion hose (514), and a valve (515) is provided on the infusion hose (514).

4. The apparatus for determining dissolved oxygen in a water sample according to claim 3, characterized in that: The cleaning sleeve (505) is hollow in the middle.

5. The apparatus for determining dissolved oxygen in a water sample according to claim 4, characterized in that: The fixing plate (509) is arc-shaped to match the fixing slot (502).

6. The apparatus for determining dissolved oxygen in a water sample according to claim 5, characterized in that: A connecting block is provided at the top of the push rod (512).

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