Portable pH tester

Abstract

The utility model provides a portable pH determinator, which relates to the technical field of pH determination, and comprises a host box, a detection electrode pen, a turntable box and a turntable, the host box is provided with a containing cavity for the detection electrode pen to insert, the turntable box is arranged on one side of the host box, the turntable is pivoted in the turntable box, and the turntable is arranged in the containing cavity. The detection electrode pen is connected with a host in the host box through a connecting wire, the middle section of the connecting wire is wound on the turntable, a volute spiral spring box is arranged on the host box, and a spring rotating shaft of the volute spiral spring box is coaxially connected with the turntable. When the connecting wire is pulled out of the rotating disc and drives the connecting wire to rotate, the rotating disc is linked with the volute spiral spring in the volute spiral spring box to contract, after detection is completed and the connecting wire loses tension, the rotating disc is driven to rotate through the reset force of the volute spiral spring, and the connecting wire is rewound on the rotating disc and used for assisting storage of the connecting wire 5 and preventing the connecting wire from being disordered outside. The carrying is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pH measurement, in particular to a portable pH measuring instrument. Background Art

[0002] A pH meter primarily measures the activity of hydrogen ions in a solution to determine the solution's acidity or alkalinity. pH measurement is a crucial analytical technique in industrial production, often requiring analysis of the activity of intermediate products and various ions in production processes, such as in the production of citric acid, fuel synthesis, monoclonal antibodies, and penicillin. In the past, chemical analysis methods, such as volumetric analysis, were often employed, but these methods were time-consuming and unable to meet automation requirements. Potentiometric analysis, a recently developed method that utilizes electrochemical principles to determine hydrogen ion concentration by measuring the potential of a non-polarizable electrode under zero current conditions, is a method that offers advantages over other analytical methods, such as accuracy, reliability, and rapidity. It has become a crucial aspect of analytical chemistry and an indispensable tool in routine industrial automated analysis.

[0003] Existing pH measuring instruments are mostly used in laboratories and are mostly desktop. During the monitoring process, monitoring personnel need to carry out monitoring work outdoors. Desktop pH measuring instruments are large in size and not easy to carry. In addition, they need to be directly plugged into a power source to work. Outdoor monitoring work cannot provide external power supply, resulting in the inability to carry out monitoring work. Although some portable pH meters are available on the market, the monitoring head needs to be connected to the display instrument with a data cable, and the data cable required for detection is long, and the messy data cable is not easy to carry. Moreover, the detection head exposed to the air is easily contaminated, affecting the detection data. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a portable pH meter that solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a portable pH meter, including a main box, a detection electrode pen, a turntable box, and a turntable, the main box is provided with a storage cavity for inserting the detection electrode pen, the turntable box is arranged on one side of the main box, the turntable is pivotally connected in the turntable box, the detection electrode pen is connected to the main unit in the main box through a connecting line, the middle section of the connecting line is wound on the turntable, the main box is provided with a spiral spring box, and the spring shaft of the spiral spring box is coaxially connected to the turntable.

[0008] Preferably, the host box is provided with a display screen, the display screen is connected to the host, and the host box is also provided with a battery for supplying power to the display screen, the host, and the detection electrode pen.

[0009] Preferably, a handle is provided on the side of the main box.

[0010] Preferably, a plurality of semicircular grooves are provided on the outer ring of the middle section of the detection electrode pen, a positioning mechanism corresponding to the plurality of semicircular grooves is provided in the storage cavity, and a button for controlling the positioning mechanism is provided on the handle.

[0011] Preferably, the positioning mechanism includes a slider, a spring and an electromagnet. A sliding groove is horizontally opened on the storage cavity, and the slider is slidably adapted in the sliding groove. The electromagnet is arranged at the top of the sliding groove and is connected to the slider through a spring. One end of the slider corresponds to the semicircular groove. The slider is a magnetic body and can adsorb the slider when the electromagnet is energized. The button is used to control the on and off of the electromagnet.

[0012] Preferably, the surface of the slider corresponding to the semicircular groove is hemispherical.

[0013] Preferably, the top of the detection electrode pen is provided with a handle with anti-slip grooves.

[0014] (3) Beneficial effects

[0015] The utility model provides a portable pH meter with the following beneficial effects:

[0016] 1. In this portable pH meter, when the connecting wire is pulled out from the turntable and drives it to rotate, the scroll spring in the turntable-linked scroll spring box contracts. When the test is completed, the connecting wire loses its tension, and the turntable is rotated by the reset force of the scroll spring, and the connecting wire is rewound on the turntable to assist in storing the connecting wire 5, preventing the connecting wire from being messy outside and making it easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an axonometric drawing of the present utility model;

[0018] Figure 2 It is a side sectional view of the present utility model.

[0019] In the figure: 1 main box, 2 detection electrode pen, 3 storage cavity, 4 handle, 5 connecting line, 6 turntable box, 7 turntable, 8 handle, 9 button, 10 scroll spring box, 11 display screen, 12 semicircular groove, 13 slide groove, 14 slider, 15 spring, 16 electromagnet. DETAILED DESCRIPTION

[0020] The present invention provides a portable pH meter. Figure 1-2 As shown, it includes a main box 1, a detection electrode pen 2, a turntable box 6, and a turntable 7.

[0021] The main box 1 is provided with a storage cavity 3 for inserting the detection electrode pen 2. To facilitate the removal of the detection electrode pen 2, a handle 4 with anti-slip grooves is provided at the top of the detection electrode pen 2. A turntable box 6 is provided on one side of the main box 1, and a turntable 7 is pivotally connected to the turntable box 6. The detection electrode pen 2 is connected to the BNC interface of the main unit in the main box 1 via a connecting cable 5. The middle section of the connecting cable 5 is wound around the turntable 7. The turntable 7 is used to store the connecting cable 5, preventing the connecting cable 5 from being scattered outside and making it easy to carry. The main box 1 is provided with a spiral spring box 10. The spring shaft of the spiral spring box 10 is coaxially connected to the turntable 7. When the connecting cable 5 is pulled out of the turntable 7 and driven to rotate, the turntable 7 links the spiral spring inside the spiral spring box 10 to contract. After the detection is completed, the connecting cable 5 loses its tension, and the return force of the spiral spring drives the turntable 7 to rotate, rewinding the connecting cable 5 around the turntable 7 to assist in the storage of the connecting cable 5.

[0022] The main unit box 1 is provided with a display screen 11, on which a control panel is mounted. The display screen 11 is connected to the main unit. The main unit box 1 also houses a battery for powering the display screen 11, the main unit, and the detection electrode pen 2. The detection electrode pen 2, the main unit, the display screen 11, and the battery are all commercially available products, and their details are omitted here. For example, the detection electrode pen 2 can be the PH8010 from Boqu Instruments, and the main unit can use a pH / ORP controller.

[0023] During specific use, after turning on the host, the display screen 11 lights up, and the user sets the items and parameters through the buttons on the control panel of the display screen 11. After setting, the detection electrode pen 2 is placed in the standard pH buffer solution to calibrate the meter; after calibration, the detection electrode pen 2 is taken out from the standard pH buffer solution and wiped clean with absorbent paper, and then the end of the detection electrode pen 2 is placed in the sample liquid to be tested, ensuring that the liquid level of the sample liquid to be tested completely submerges the probe. After placing it in, continue to shake the detection electrode pen 2 slowly. At this time, the corresponding detection value is displayed on the display screen 11. After the value stabilizes, a more accurate pH value of the sample liquid to be tested can be obtained. After the test is completed, the detection electrode pen 2 is taken out from the sample liquid to be tested, wiped clean, and then the detection electrode pen 2 is inserted into the storage cavity 3 to avoid damage. It is also helpful for carrying and conducting multi-sample testing.

[0024] A handle 8 is provided on the side of the main box 1 to facilitate carrying the device.

[0025] In order to prevent the detection electrode pen 2 from slipping out of the storage cavity 3 during carrying, a fixing device needs to be provided between the detection electrode pen 2 and the storage cavity 3. The specific structure of the fixing device is as follows: a plurality of semicircular grooves 12 are provided on the outer ring of the middle section of the detection electrode pen 2. In this embodiment, four semicircular grooves 12 are provided, and a positioning mechanism corresponding to the four semicircular grooves 12 is provided in the storage cavity 3. A button 9 for controlling the positioning mechanism is provided on the handle 8.

[0026] Specifically, such as Figure 2 As shown, the positioning mechanism includes a slider 14, a spring 15, and an electromagnet 16. A slot 13 is transversely defined in the receiving chamber 3. The slider 14 slides within the slot 13. The electromagnet 16 is positioned at the top of the slot 13 and connected to the slider 14 via the spring 15. One end of the slider 14 corresponds to the semicircular groove 12. The slider 14 is magnetic or iron. When the slider 14 is magnetic, the magnetic pole of the electromagnet 16 is opposite to the corresponding side when energized, allowing the electromagnet 16 to attract the slider 14. The button 9 is used to control the on and off of the electromagnet 16. The electromagnet 16 is powered by a battery. The side of the slider 14 corresponding to the semicircular groove 12 is hemispherical.

[0027] When the detection electrode pen 2 is fixed, after being inserted into the storage cavity 3 until its bottom end contacts the bottom of the storage cavity 3, the slider 14 just corresponds to the semicircular groove 12. At this time, under the action of the spring 15, half of the slider 14 is pushed into the semicircular groove 12, and the other half is in the chute 13. When the detection electrode pen 2 needs to be pulled out for use, one hand holds the handle 8 and presses the button 9 at the same time to energize the electromagnet 16. After the electromagnet 16 is energized, it draws the slider 14 into the chute 13. After the detection electrode pen 2 is freed from its restraint, it can be pulled out of the storage cavity 3.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable pH meter, characterized in that: The invention comprises a main box (1), a detection electrode pen (2), a turntable box (6), and a turntable (7); the main box (1) is provided with a receiving cavity (3) for inserting the detection electrode pen (2); the turntable box (6) is arranged on one side of the main box (1); the turntable (7) is pivotally connected in the turntable box (6); the detection electrode pen (2) is connected to the main machine in the main box (1) via a connecting line (5); the middle section of the connecting line (5) is wound around the turntable (7); a spiral spring box (10) is provided on the main box (1); the spring shaft of the spiral spring box (10) is coaxially connected to the turntable (7).

2. A portable pH meter according to claim 1, characterized in that: The host box (1) is provided with a display screen (11), the display screen (11) is connected to the host, and a battery for supplying power to the display screen (11), the host, and the detection electrode pen (2) is also provided in the host box (1).

3. A portable pH meter according to claim 2, characterized in that: A handle (8) is provided on the side of the main box (1).

4. A portable pH meter according to claim 3, characterized in that: A plurality of semicircular grooves (12) are provided on the outer ring of the middle section of the detection electrode pen (2); a positioning mechanism corresponding one-to-one to the plurality of semicircular grooves (12) is provided in the storage cavity (3); and a button (9) for controlling the positioning mechanism is provided on the handle (8).

5. A portable pH meter according to claim 4, characterized in that: The positioning mechanism comprises a slider (14), a spring (15) and an electromagnet (16). A slide groove (13) is transversely provided on the storage chamber (3). The slider (14) is slidably fitted in the slide groove (13). The electromagnet (16) is arranged at the top end of the slide groove (13) and is connected to the slider (14) through the spring (15). One end of the slider (14) corresponds to the semicircular groove (12). The slider (14) is a magnetic body and can adsorb the slider (14) when the electromagnet (16) is energized. The button (9) is used to control the on and off of the electromagnet (16).

6. A portable pH meter according to claim 5, characterized in that: The surface of the slider (14) corresponding to the semicircular groove (12) is hemispherical.

7. A portable pH meter according to claim 1, characterized in that: The top end of the detection electrode pen (2) is provided with a handle (4) with anti-slip patterns.

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