Portable water quality pH value detection device and use method thereof

Abstract

The invention relates to the technical field of water quality detection, and discloses a portable water quality pH value detection device and a use method thereof.The portable water quality pH value detection device comprises a detection box, a movable plate and a cover plate, five sets of containing grooves are formed in the bottom face of the inner wall of the detection box, and a water pumping mechanism, a beaker, a storage mechanism, a detection mechanism and a reagent bottle are inserted into the inner wall of each set of containing groove; the back of the movable plate is fixedly connected with a colorimetric card. A glass electrode is soaked and stored in a storage rod to form a hydration layer, a conical flask is in threaded connection with a connecting seat, a spring is extruded to rotate a detection seat, so that a connecting pin is in clamping connection with the detection seat along an L-shaped sliding groove, disassembly and assembly are convenient, the glass electrode is conveniently replaced for multiple times to detect water quality, and the detection result is more accurate; and when the movable plates are parallel, the conical flasks can be conveniently and horizontally placed, secondary inspection is performed by referring to a colorimetric card, an operator can conveniently detect other key indexes, and the outdoor applicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection, and particularly to a portable water quality pH value detection device and its usage method. Background Art

[0002] Water quality refers to the quality of water, including its physical, chemical, and biological properties. Good water quality is crucial for human health, the ecosystem, and economic development. To ensure good water quality, the government and relevant departments need to take measures to monitor and manage water sources, reduce pollutant emissions, strengthen the construction and maintenance of sewage treatment facilities, and improve the efficiency of water resource utilization. People's production and life are inseparable from clean water sources. Key detection indicators for water quality include organic pollutants, heavy metal content, total coliforms and other microorganisms, dissolved oxygen, and pH value. Organic pollutants such as pesticide residues and organic substances in industrial wastewater may have negative impacts on the environment and human health. Limiting the content of heavy metals such as lead, mercury, and cadmium is crucial for protecting human health. Dissolved oxygen is used to detect the concentration of oxygen in outdoor water sources and is essential for the survival of aquatic organisms. Too low dissolved oxygen may cause aquatic organisms to suffocate and die. The pH value is an indicator that measures the concentration of hydrogen ions in water, ranging from 0 to 14. Water with a lower pH value is usually acidic, while water with a higher pH value is alkaline. An appropriate pH value is crucial for human health and the survival of organisms in water.

[0003] In the prior art, such as a portable water quality pH value detection device with the publication number CN 207882202 U, this device conducts the change of pH in water quality through a pH glass electrode, and the depth of penetration into the water can be adjusted through a telescopic device. The A / D converter converts the analog signal input by the pH glass electrode into a digital signal, and the digital signal is output to the data bus interface of the single-chip microcomputer. After being processed by the single-chip microcomputer, a numerical signal is output to the display for display. It is convenient to use, and the structure is simple and easy to carry. However, in the actual use process, the pH glass electrode needs to be soaked in distilled water or 0.1N hydrochloric acid for more than twenty-four hours before detection to form a stable hydration layer, which is linearly related to the pH value of the sample test solution at a certain temperature. After installing the pH glass electrode and detecting underwater, the underwater temperature is uncontrollable, resulting in low accuracy of the detected pH value data of the sample. In addition, outdoor water quality needs to be detected multiple times to ensure accurate results. This device has a single detection element and low outdoor applicability. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a portable water quality pH value detection device and its usage method, which have the advantages of accurate detection results and high outdoor applicability, and solve the problems of low accuracy of detection data and low outdoor applicability.

[0006] (2) Technical solution

[0007] To achieve the purpose of accurate detection results and high outdoor applicability, the present invention provides the following technical solution: a portable water quality pH value detection device, including a detection box, a movable plate rotatably connected to the front of the detection box, and a cover plate rotatably connected to the top surface of the detection box. A placement groove is opened on the bottom surface of the inner wall of the detection box. There are five groups of the placement grooves. A water pumping mechanism, a beaker, a storage mechanism, a detection mechanism, and a reagent bottle are inserted into the inner wall of each group of placement grooves. A color comparison card is fixedly connected to the back surface of the movable plate.

[0008] Preferably, the water pumping mechanism includes a water pump and a rubber hose. The water pump is inserted into the inner wall of the placement groove, and the output end of the water pump is fixedly connected to the rubber hose.

[0009] Preferably, the storage mechanism includes a storage rod, a storage cavity, a connection seat, a glass electrode, and a connection pin. The storage rod is inserted into the inner wall of the placement groove. A storage cavity is provided inside the storage rod. There are two storage cavities. Connection seats are threadedly connected to both ends of the storage rod. A glass electrode is fixedly connected to the center of the inner wall of the connection seat and penetrates through the bottom surface of the connection seat. A connection pin is fixedly connected to the surface of the connection seat.

[0010] Preferably, the detection mechanism includes a conical flask, a detection seat, a sliding groove, a spring, a detection rod, a detection element, a battery cavity, a fixed cover, a display screen, and a detection switch. The conical flask is inserted into the inner wall of the placement groove. A detection seat is inserted into the top end of the conical flask. A sliding groove is opened on the inner wall of the detection seat. A spring is fixedly connected to the top surface of the inner wall of the detection seat. A detection rod is fixedly connected to the center of the top surface of the detection seat and penetrates through the inner wall of the detection seat. A detection element is fixedly installed at the bottom end of the detection rod. A battery cavity is provided inside the detection rod. A fixed cover is threadedly connected to the top end of the detection rod. A display screen is fixedly installed on the surface of the detection rod. A detection switch is fixedly installed on the top surface of the detection seat. The detection switch is electrically connected to the detection element and the display screen.

[0011] Preferably, a method for using a portable water quality pH value detection device includes the following steps:

[0012] Step 1: Open the cover plate on the top surface of the detection box, rotate the movable plate on the front of the detection box from top to bottom, insert the end of the rubber hose away from the water pump into the detection water source, start the water pump, and extract the sample liquid and collect it in the beaker for standing.

[0013] Step 2: After the thermometer on the bottom surface of the inner wall of the placement groove detects the temperature of the sample liquid, pour the sample liquid in the beaker into the conical flask, rotate the connection seat threadedly connected to one end of the storage rod to separate the glass electrode from the storage rod, and threadedly connect the bottom of the connection seat to the conical flask.

[0014] Step 3: Insert the bottom end of the detection mechanism into the connecting seat, compress the spring and rotate the detection seat, so that the connecting pin on the surface of the connecting seat is slidably connected to the sliding groove, the bottom end of the detection element is attached to the top end of the glass electrode, turn on the detection switch, and the detection result is displayed on the display screen;

[0015] Step 4: Open the reagent bottle and the connecting seat, drop the detection reagent into the sample liquid in the conical flask, place it on the top surface of the movable plate, and obtain the detection result by referring to the color comparison card.

[0016] Preferably, the detection box is rotatably connected to the movable plate and the cover plate through hinges, and the bottom surface area of the cover plate is larger than the top surface area of the detection box.

[0017] Preferably, a sponge is fixedly connected to the side surface of the inner wall of the placement groove, a thermometer is arranged on the bottom surface of the inner wall of the placement groove, and the height of the placement groove is lower than the height of the movable plate.

[0018] Preferably, there are two beakers, and the inner wall volume of the beaker is larger than the inner wall volume of the conical flask.

[0019] Preferably, the sliding groove is of an L-shaped structure, the top height of the glass electrode is the same as the top height of the connecting pin, and the bottom height of the detection element is the same as the top height of the inner wall of the sliding groove.

[0020] Preferably, the diameter of the spring is larger than the diameter of the detection rod, and the bottom end of the spring is elastically connected to the connecting seat.

[0021] Compared with the prior art, the present invention provides a portable water quality pH value detection device and its use method, which have the following beneficial effects:

[0022] 1. In the present invention, two storage cavities are arranged inside the storage rod, the glass electrode inside the connecting seat is soaked and stored to form a hydration layer, the top end of the conical flask is threadedly connected to the connecting seat, the glass electrode is soaked in the sample liquid, the spring is compressed and the detection seat is rotated, so that the connecting pin on the surface of the connecting seat is clamped to the detection seat along the L-shaped sliding groove, the disassembly and assembly are convenient, which is convenient for the operator to replace the glass electrode multiple times to detect the water quality, and the detection result is more accurate.

[0023] 2. In the present invention, the cover plate rotatably connected to the top surface of the detection box through a hinge, cooperates with the movable plate to keep the overall device airtight, and uniformly stores to avoid the device from scattering during outdoor movement. The movable plate is rotatably connected to the front surface of the detection box through a hinge, so that the movable plate is parallel to the bottom surface of the detection box, which is convenient for horizontally placing the conical flask, while referring to the color comparison card for secondary inspection, it is convenient for the operator to detect other key indicators, and the outdoor applicability is higher. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2It is a cutting view of the structure detection box of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure water pumping mechanism of the present invention;

[0027] Figure 4 It is a cutting view of the structure storage mechanism of the present invention;

[0028] Figure 5 It is a vertical cutting view of the structure detection mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the installation of the structure detection mechanism and the connecting seat of the present invention;

[0030] Figure 7 It is a front view of the overall structure of the present invention.

[0031] Wherein: 1. Detection box; 2. Movable plate; 3. Cover plate; 4. Water pumping mechanism; 5. Beaker; 6. Storage mechanism; 7. Detection mechanism; 8. Reagent bottle; 9. Color comparison card; 10. Water pump; 11. Storage rod; 12. Connecting seat; 13. Glass electrode; 14. Connecting pin; 15. Erlenmeyer flask; 16. Detection seat; 17. Detection rod; 18. Display screen; 19. Detection switch. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0033] Please refer to Figure 1-7 , a portable water quality pH value detection device, including a detection box 1, a movable plate 2 rotatably connected to the front of the detection box 1, a cover plate 3 rotatably connected to the top of the detection box 1, a placement groove is provided on the bottom surface of the inner wall of the detection box 1, there are five groups of placement grooves, and each group of placement grooves is inserted with a water pumping mechanism 4, a beaker 5, a storage mechanism 6, a detection mechanism 7 and a reagent bottle 8, and a color comparison card 9 is fixedly connected to the back of the movable plate 2.

[0034] Furthermore, the water pumping mechanism 4 includes a water pump 10 and a rubber hose. The water pump 10 is inserted into the inner wall of the placement groove. The output end of the water pump 10 is fixedly connected with a rubber hose. The specific model of the water pump 10 is a gas-liquid mixing pump of VDP160B, which can pass gas, body fluid and mixture, can pass impurities and is not afraid of blockage. The water pump 10 cooperates with the rubber hose to facilitate the operator to draw the sample liquid under the outdoor water source underwater.

[0035] Further, the storage mechanism 6 includes a storage rod 11, a storage cavity, a connecting seat 12, a glass electrode 13 and a connecting pin 14. The storage rod 11 is inserted into the inner wall of the placement groove. There are two storage cavities inside the storage rod 11. Two storage cavities are provided in a set of storage rods 11 to correspondingly store two sets of glass electrodes 13, which is convenient for the operator to replace and detect the water quality multiple times. Connecting seats 12 are threadedly connected to both ends of the storage rod 11. A glass electrode 13 is fixedly connected to the center of the inner wall of the connecting seat 12 and penetrates through the bottom surface of the connecting seat 12. The specific model of the glass electrode 13 is a tetrafluoro electrode of SIN-pH-5013A, with a pH measurement range of 0-14pH and a temperature range of 0-60 degrees. The application range includes industrial wastewater, strong acids and alkalis or waste gas treatment. A connecting pin 14 is fixedly connected to the surface of the connecting seat 12, and the connecting pin 14 protrudes from the surface of the connecting seat 12. While realizing the fixed connection between the detection seat 16 and the connecting seat 12, it provides a force application point for the operator to rotate the connecting seat 12, making the operation more convenient.

[0036] Further, the detection mechanism 7 includes a conical flask 15, a detection seat 16, a sliding groove, a spring, a detection rod 17, a detection element, a battery cavity, a fixed cover, a display screen 18 and a detection switch 19. The conical flask 15 is inserted into the inner wall of the placement groove. The bottom surface of the conical flask 15 has a larger force-bearing area and is not easily toppled during outdoor detection. The detection seat 16 is inserted into the top end of the conical flask 15. A sliding groove is provided in the inner wall of the detection seat 16. A spring is fixedly connected to the top surface of the inner wall of the detection seat 16. A detection rod 17 is fixedly connected to the center of the top surface of the detection seat 16 and penetrates through the inner wall of the detection seat 16. A detection element is fixedly installed at the bottom end of the detection rod 17. The cooperation of the spring and the sliding groove to clamp the connecting pin 14 is more stable, and the bottom end of the detection element fits more closely with the top end of the glass electrode 13, making the signal transmission not easily short-circuited. A battery cavity is provided inside the detection rod 17. A fixed cover is threadedly connected to the top end of the detection rod 17. A display screen 18 is fixedly installed on the surface of the detection rod 17. A detection switch 19 is fixedly installed on the top surface of the detection seat 16, and the detection switch 19 is electrically connected to the detection element and the display screen 18.

[0037] Further, a method for using a portable water quality pH value detection device includes the following steps:

[0038] Step 1: Open the top cover 3 of the detection box 1, rotate the movable plate 2 on the front of the detection box 1 from top to bottom so that the movable plate 2 is parallel to the bottom surface of the detection box 1. Insert the end of the rubber hose far from the water pump 10 into the detection water source, start the water pump 10, and pump the sample liquid to collect and let it stand in the beaker 5, which is beneficial to precipitate the impurities in the sample liquid and improve the detection accuracy;

[0039] Step 2: After placing a thermometer on the bottom surface of the inner wall of the tank to detect the temperature of the sample liquid, pour the sample liquid in the beaker 5 into the conical flask 15, rotate the connecting seat 12 threadedly connected to one end of the storage rod 11, separate the glass electrode 13 from the storage rod 11, and thread the bottom of the connecting seat 12 to the conical flask 15, so that the glass electrode 13 that has formed a hydration layer is in a linear relationship with the pH value in the sample liquid;

[0040] Step 3, plug the bottom end of the detection mechanism 7 into the connection seat 12, squeeze the spring and rotate the detection seat 16, so that the connection pin 14 on the surface of the connection seat 12 is slidably connected to the sliding groove, the spring cooperates with the sliding groove to fix the detection seat 16 with the connection seat 12, the bottom end of the detection element is attached to the top end of the glass electrode 13, turn on the detection switch 19, and the detection result is displayed on the display screen 18;

[0041] Step 4: Open the reagent bottle 8 and the connecting seat 12, drop the detection reagent into the sample liquid in the conical bottle 15, place it on the top surface of the movable plate 2, and refer to the colorimetric card 9 to obtain the detection result. The secondary detection comparison result is more accurate.

[0042] Furthermore, the test box 1 is rotatably connected to the movable plate 2 and the cover plate 3 by a hinge. The specific model of the hinge is a damping hinge of CL272-2, which can flexibly adjust the rotation angle of the movable plate 2 and the cover plate 3. When the movable plate 2 is parallel to the bottom surface of the test box 1 and a conical flask 15 is placed to refer to the colorimetric card 9 for testing, it is more stable and not easy to tip over. The bottom surface area of ​​the cover plate 3 is larger than the top surface area of ​​the test box 1. When the cover plate 3 is closed, the movable plate 2 is perpendicular to the bottom surface of the test box 1, and the test box 1 is completely sealed. During outdoor movement and transportation, parts are not easy to scatter.

[0043] Furthermore, a sponge is fixedly connected to the side of the inner wall of the placement groove. The sponge filling reduces the gap between the placement groove and the glass container, plays a buffering role during the movement of the detection box 1, and avoids bumps and breakage. A thermometer is set on the bottom of the inner wall of the placement groove. When the beaker 5 is filled with sample liquid and left to stand, it can be tested whether the temperature of the sample liquid matches the temperature range of the detection element. The height of the placement groove is lower than the height of the movable plate 2, which is convenient for the operator to open the movable plate 2 and take the device.

[0044] Furthermore, two beakers 5 are provided, and the volume of the inner wall of beaker 5 is larger than the volume of the inner wall of conical flask 15. Beaker 5 is specifically a glass beaker with an eagle-bilged pouring diversion port, and the capacity is 500ml. The conical flask 15 is specifically a screw-mouth conical flask of model A3, and the capacity is 250ml. The pumping mechanism 4 can extract 1000ml of sample liquid at a time, which is convenient for the operator to detect the pH value of water quality and other key indicators.

[0045] Further, the sliding groove is of an L-shaped structure. When the connecting pin 14 slides vertically in the sliding groove, the detection seat 16 is separated from the connecting seat 12. When the connecting pin 14 slides horizontally in the sliding groove, the connecting seat 12 is clamped to the detection seat 16 through the connecting pin 14. The height of the top of the glass electrode 13 is the same as the height of the top of the connecting pin 14, and the height of the bottom end of the detection element is the same as the height of the inner wall top of the sliding groove, ensuring that when the connecting seat 12 is fixedly connected to the detection seat 16, the detection element is in close contact with the glass electrode 13, and the signal transmission is more stable.

[0046] Further, the diameter of the spring is larger than the diameter of the detection rod 17, ensuring that a spring compression space is reserved between the inner walls of the detection seat 16 and the connecting seat 12. The bottom end of the spring is elastically connected to the connecting seat 12, ensuring that the spring pushes the connecting pin 14 to closely adhere to the inner wall of the sliding groove.

[0047] In use, open the fixed cover, install the battery in the battery chamber of the detection mechanism 7, fill the two storage chambers inside the storage rod 11 with distilled water or 0.1N hydrochloric acid, soak the glass electrode 13 in it for more than 24 hours to form a stable hydrated layer, and complete the preparatory work before detection. Place the detection box 1 horizontally in the working area. After turning up the cover plate 3, turn down the movable plate 2 to make the movable plate 2 parallel to the bottom surface of the detection box 1. Take out the water pumping mechanism 4 from the placement groove in the detection box 1, insert the end of the rubber hose away from the water pump 10 into the detection water source, start the water pump 10, extract the sample liquid and collect it in the beaker 5 for standing. After the thermometer on the bottom surface of the inner wall of the placement groove detects that the temperature range of the standing sample liquid is 0 - 60 degrees, pour the sample liquid in the beaker 5 into the conical flask 15. Turn and open the connecting seat 12 threadedly connected to one end of the storage rod 11 to separate the glass electrode 13 from the storage rod 11, insert it into the conical flask 15, turn the connecting seat 12 and threadedly connect it to the conical flask 15. Then insert the bottom end of the detection seat 16 of the detection mechanism 7 into the connecting seat 12, make the connecting pin 14 slide along the L-shaped sliding groove on the inner wall of the detection seat 16, squeeze the spring on the top surface of the inner wall of the detection seat 16 to make the detection seat 16 snap onto the connecting seat 12, and make the bottom end of the detection element fit with the top end of the glass electrode 13. Turn on the detection switch 19. The hydrated layer on the surface of the glass electrode 13 has a linear relationship with the pH value of the sample test solution. The detection result is displayed on the display screen 18 through the detection element, and the initial detection process of the pH value of the sample liquid is completed. Turn and open the reagent bottle 8 and the connecting seat 12, drop the detection reagent into the sample liquid in the conical flask 15, place it on the top surface of the movable plate 2. After the detection reagent and the sample liquid are mixed and react to change color, complete the secondary detection with reference to the colorimetric card 9. The entire water quality pH value detection process is completed through two detections and comparisons. When it is necessary to replace the glass electrode 13 for multiple detections, turn the detection seat 16 to drive the L-shaped sliding groove to rotate, and use the elasticity of the spring on the top surface of the inner wall of the detection seat 16 to push the connecting pin 14 out of the detection seat 16, so that the detection element inside the detection seat 16 is separated from the glass electrode 13 inside the connecting seat 12, and a new connecting seat 12 is replaced.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable water quality pH value detection device, comprising a detection box (1), a movable plate (2) rotatably connected to the front surface of the detection box (1), and a cover plate (3) rotatably connected to the top surface of the detection box (1). Features: The bottom surface of the inner wall of the detection box (1) is provided with placement grooves, and the placement grooves are arranged in five groups. The inner wall of each group of placement grooves is plugged with a pumping mechanism (4), a beaker (5), a storage mechanism (6), a detection mechanism (7) and a reagent bottle (8), and the back of the movable plate (2) is fixedly connected with a colorimetric card (9).

2. A portable water quality pH value detection device according to claim 1, Features: The water pumping mechanism (4) comprises a water pump (10) and a rubber hose; the water pump (10) is plugged into the inner wall of the placement groove; and the output end of the water pump (10) is fixedly connected to the rubber hose.

3. A portable water quality pH value detection device according to claim 2, Features: The storage mechanism (6) comprises a storage rod (11), a storage cavity, a connecting seat (12), a glass electrode (13) and a connecting pin (14); the storage rod (11) is inserted into the inner wall of the placement groove; the storage cavity is arranged inside the storage rod (11); two storage cavities are arranged; both ends of the storage rod (11) are threadedly connected to the connecting seat (12); the glass electrode (13) is fixedly connected to the center of the inner wall of the connecting seat (12) and penetrates the bottom surface of the connecting seat (12); and the connecting pin (14) is fixedly connected to the surface of the connecting seat (12).

4. A portable water quality pH value detection device according to claim 3, Features: The detection mechanism (7) comprises a conical flask (15), a detection seat (16), a sliding groove, a spring, a detection rod (17), a detection element, a battery cavity, a fixed cover, a display screen (18) and a detection switch (19); the conical flask (15) is inserted into the inner wall of the placement groove; the detection seat (16) is inserted into the top of the conical flask (15); the inner wall of the detection seat (16) is provided with a sliding groove; the top surface of the inner wall of the detection seat (16) is fixedly connected with a spring; the center of the top surface of the detection seat (16) is fixedly connected with a detection rod (17) and passes through the inner wall of the detection seat (16); the bottom end of the detection rod (17) is fixedly installed with a detection element; the inside of the detection rod (17) is provided with a battery cavity; the top of the detection rod (17) is threadedly connected with a fixed cover; the surface of the detection rod (17) is fixedly installed with a display screen (18); the top surface of the detection seat (16) is fixedly installed with a detection switch (19); the detection switch (19) is electrically connected to the detection element and the display screen (18).

5. A method for using a portable water quality pH value detection device according to claim 4, The following steps are involved: Step 1: Open the top cover plate (3) of the test box (1), rotate the movable plate (2) on the front of the test box (1) from top to bottom, insert the end of the rubber hose away from the water pump (10) into the test water source, start the water pump (10), extract the sample liquid and collect it in the beaker (5) and let it stand; Step 2: After placing a thermometer on the bottom surface of the inner wall of the tank to detect the temperature of the sample liquid, pour the sample liquid in the beaker (5) into the conical flask (15), rotate the connecting seat (12) threadedly connected to one end of the storage rod (11) to separate the glass electrode (13) from the storage rod (11), and the bottom of the connecting seat (12) is threadedly connected to the conical flask (15); Step 3: Insert the bottom end of the detection mechanism (7) into the connection seat (12), squeeze the spring and rotate the detection seat (16), so that the connection pin (14) on the surface of the connection seat (12) is slidably connected to the sliding groove, the bottom end of the detection element is in contact with the top end of the glass electrode (13), turn on the detection switch (19), and the detection result is displayed on the display screen (18); Step 4: Open the reagent bottle (8) and the connecting seat (12), drip the detection reagent into the sample liquid in the conical bottle (15), place it on the top surface of the movable plate (2), and refer to the colorimetric card (9) to obtain the detection result.

6. A portable water quality pH value detection device according to claim 5, Features: The detection box (1) is rotatably connected to the movable plate (2) and the cover plate (3) via a hinge, and the bottom surface area of ​​the cover plate (3) is larger than the top surface area of ​​the detection box (1).

7. A portable water quality pH value detection device according to claim 6, Features: A sponge is fixedly connected to the side surface of the inner wall of the placement groove, a thermometer is arranged on the bottom surface of the inner wall of the placement groove, and the height of the placement groove is lower than the height of the movable plate (2).

8. A portable water quality pH value detection device according to claim 7, Features: Two beakers (5) are provided, and the volume of the inner wall of the beaker (5) is greater than the volume of the inner wall of the conical flask (15).

9. A portable water quality pH value detection device according to claim 8, Features: The sliding groove is an L-shaped structure, the top height of the glass electrode (13) is the same as the top height of the connecting pin (14), and the bottom height of the detection element is the same as the top height of the inner wall of the sliding groove.

10. A portable water quality pH value detection device according to claim 9, Features: The diameter of the spring is greater than the diameter of the detection rod (17), and the bottom end of the spring is elastically connected to the connection seat (12).

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