Domestic drinking water pH value detection instrument

Abstract

The utility model discloses a domestic drinking water pH value detection instrument, and relates to the technical field of domestic drinking water pH value detection, the domestic drinking water pH value detection instrument comprises a workbench, the top of the workbench is fixedly connected with a limiting rod, and the surface of the limiting rod is movably sleeved with a moving plate. According to the domestic drinking water pH value detection instrument, a first limiting plate is pulled outwards through an arranged second spring, so that a first clamping wheel and a second clamping wheel are separated from one-way engagement, a movable plate ascends, different types of containers can be fixed, at the moment, the first limiting plate is loosened, and through the arranged second clamping wheel and the first clamping wheel, the pH value of the domestic drinking water is detected. The positions of the first connecting rod assembly and the second connecting rod assembly are limited, and the phenomena that the first connecting rod assembly and the second connecting rod assembly are loosened, liquid in the container flows, and measurement of the glass electrode assembly is inaccurate are avoided; and any counter-acting force caused by gravity is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pH detection of drinking water, in particular to a pH value detection instrument for drinking water. Background Art

[0002] Acidity and alkalinity describe the strength of the acidity and alkalinity of an aqueous solution. pH is often used to indicate the acidity and alkalinity of a solution. Under thermodynamic standard conditions, an aqueous solution with pH = 7 is neutral, pH < 7 is acidic, and pH > 7 is alkaline. When testing the pH value of drinking water, a pH tester is generally required;

[0003] However, the existing method for detecting pH value is generally to detect the pH value of aqueous solution through glass electrode detection method. When the detection instrument is in use, the glass sphere of the instrument will be in contact with the bottom of the container. Due to the interaction of forces, there will be partial pressure on the surface of the glass sphere, which will cause slight differences in the pH value detection data. In this regard, we propose a pH value detection instrument for drinking water to solve the above problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an instrument for detecting the pH value of drinking water, which solves the problem that the method for detecting the pH value is generally to detect the pH value of the aqueous solution through a glass electrode detection method. However, when the detection instrument is in use, the glass sphere of the instrument will be in contact with the bottom of the container. Due to the interaction of forces, partial pressure will exist on the surface of the glass sphere, thereby causing slight differences in the data of the pH value detection.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a drinking water pH value detection instrument, including a workbench, the top of the workbench is fixedly connected to a limit rod, the surface of the limit rod is movably sleeved with a moving plate, the inner cavity of the moving plate is movably connected to a bidirectional screw rod through a bearing, the left and right sides of the surface of the bidirectional screw rod are threadedly sleeved with an adjustment plate, the outer surface of the adjustment plate is fixedly provided with a limit assembly, the top of the adjustment plate is fixedly connected to a support plate, the top of the left support plate is movably provided with a first connecting rod assembly through a bearing, and the top of the right support plate is movably provided with a second connecting rod assembly through a bearing, the left and right sides of the top of the workbench are fixedly connected to toothed plates, and the surface of the toothed plates is meshed with gears;

[0006] The limiting assembly includes an L-shaped plate, the inner cavity of the L-shaped plate is slidably connected to a connecting rod, the inner surface of the connecting rod is fixedly connected to a first clamping wheel, the outer surface of the bidirectional screw rod is fixedly connected to a second clamping wheel, and the inner side of the first clamping wheel and the outer side of the second clamping wheel are unidirectionally meshed.

[0007] Preferably, the inner cavity of the first connecting rod assembly and the inner cavity of the second connecting rod assembly are movably connected via a rotating shaft.

[0008] Preferably, the inner cavity of the gear is fixedly connected to the surface of the bidirectional lead screw.

[0009] Preferably, a first spring is movably sleeved on the surface of the connecting rod, the outer side of the first spring is fixedly connected to the inner side of the L-shaped plate, and the inner side of the first spring is fixedly connected to the outer side of the first clamping wheel.

[0010] Preferably, a first limiting plate is fixedly connected to the outer surface of the connecting rod.

[0011] Preferably, a second spring is provided on the movable sleeve on the surface of the limiting rod, the top of the second spring is fixedly connected to the bottom of the movable plate, and the bottom of the second spring is fixedly connected to the top of the workbench.

[0012] Preferably, a sliding rod is fixedly connected to the inner cavity of the movable plate, and a surface of the sliding rod is slidably connected to the inner cavity of the adjusting plate.

[0013] Preferably, the left and right sides of the sliding rod are both fixedly connected with a second limiting plate.

[0014] Preferably, the top of the adjustment plate is fixedly connected to a first connecting plate, the top of the first connecting plate is fixedly connected to a second connecting plate, the inner cavity of the second connecting plate is fixedly provided with a glass electrode assembly, the top of the glass electrode assembly is fixedly provided with a wire, and the top of the workbench is fixedly provided with a detector, and the output end of the detector is electrically connected to one end of the wire.

[0015] Beneficial Effects

[0016] The utility model provides a pH value detection instrument for drinking water. Compared with the prior art, it has the following beneficial effects:

[0017] The pH value detection instrument for drinking water drives the second connecting rod assembly and the first connecting rod assembly to open by synchronously moving the adjustment plate inward, so that the container is located inside the first connecting rod assembly and the second connecting rod assembly. At this time, the first limiting plate is pulled outward by the second spring, so that the first clamping wheel and the second clamping wheel are disengaged from the one-way meshing, and the movable plate rises, so that different types of containers can be fixed. At this time, the first limiting plate is released, and the positions of the first connecting rod assembly and the second connecting rod assembly are limited by the second clamping wheel and the first clamping wheel, so as to prevent the first connecting rod assembly and the second connecting rod assembly from loosening, causing the liquid in the container to flow, and causing the glass electrode assembly to measure inaccurately. When the glass electrode assembly detects the water in the container, it will not be subjected to any reaction force caused by gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the main view of the overall structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 Main view of local structure;

[0020] Figure 3 This is the front view of the transmission structure of the utility model;

[0021] Figure 4 This is the front view of the limit assembly structure of the utility model.

[0022] In the figure: 1. workbench; 2. detector; 3. wire; 4. second connecting plate; 5. first connecting plate; 6. limit assembly; 7. glass electrode assembly; 8. adjustment plate; 9. support plate; 10. second connecting rod assembly; 11. first connecting rod assembly; 12. moving plate; 13. sliding rod; 14. second limit plate; 15. limit rod; 16. second spring; 17. bidirectional screw; 18. gear; 19. tooth plate; 601. L-shaped plate; 602. first limit plate; 603. connecting rod; 604. first spring; 605. first clamping wheel; 606. second clamping wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 The utility model provides a technical solution, which specifically includes the following embodiments:

[0025] Embodiment 1:

[0026] A pH value detection instrument for drinking water, comprising a workbench 1, a limit rod 15 is fixedly connected to the top of the workbench 1, a movable plate 12 is movably sleeved on the surface of the limit rod 15, a bidirectional screw rod 17 is movably connected to the inner cavity of the movable plate 12 through a bearing, an adjustment plate 8 is threadedly sleeved on both the left and right sides of the surface of the bidirectional screw rod 17, a limit assembly 6 is fixedly provided on the outer surface of the adjustment plate 8, a support plate 9 is fixedly connected to the top of the adjustment plate 8, a first connecting rod assembly 11 is movably provided on the top of the left support plate 9 through a bearing, and a second connecting rod assembly 10 is movably provided on the top of the right support plate 9 through a bearing, and a toothed plate 19 is fixedly connected to the left and right sides of the top of the workbench 1, and a gear 18 is meshed on the surface of the toothed plate 19;

[0027] The limiting assembly 6 includes an L-shaped plate 601, the inner cavity of the L-shaped plate 601 is slidably connected to a connecting rod 603, the inner surface of the connecting rod 603 is fixedly connected to a first clamping wheel 605, the outer surface of the bidirectional screw rod 17 is fixedly connected to a second clamping wheel 606, and the inner side of the first clamping wheel 605 and the outer side of the second clamping wheel 606 are unidirectionally meshed;

[0028] By placing the container at the bottom of the gap between the second connecting rod assembly 10 and the first connecting rod assembly 11, the movable plate 12 is pressed down, so that the movable plate 12 drives the gear 18 to descend, and the gear 18 starts to rotate forward through the tooth plate 19, thereby driving the bidirectional screw rod 17 to start rotating forward, so that the adjustment plate 8 moves inward synchronously, driving the second connecting rod assembly 10 and the first connecting rod assembly 11 to open, so that the container is located inside the first connecting rod assembly 11 and the second connecting rod assembly 10. At this time, the first limit plate 602 is pulled outward through the second spring 16, so that the first clamping wheel 605 and the second clamping wheel 606 are disengaged from the one-way meshing, so that the movable plate 12 is moved upward. The first limit plate 602 is then released, and the positions of the first connecting rod assembly 11 and the second connecting rod assembly 10 are limited by the second clamping wheel 606 and the first clamping wheel 605, so as to prevent the first connecting rod assembly 11 and the second connecting rod assembly 10 from loosening, causing the liquid in the container to flow and causing inaccurate measurements by the glass electrode assembly 7. When the glass electrode assembly 7 detects the water in the container, it will not be affected by any reaction force caused by gravity. The glass electrode assembly 7 can detect the pH value of the solution through the detector 2, and the detection result is more accurate.

[0029] The inner cavity of the first connecting rod assembly 11 is movably connected to the inner cavity of the second connecting rod assembly 10 via a rotating shaft;

[0030] By means of the provided rotating shaft, the gap between the inner cavity of the first connecting rod assembly 11 and the second connecting rod assembly 10 can be adjusted, so as to facilitate fixing of containers of different models.

[0031] The inner cavity of the gear 18 is fixedly connected to the surface of the bidirectional screw rod 17 .

[0032] A first spring 604 is movably sleeved on the surface of the connecting rod 603, the outer side of the first spring 604 is fixedly connected to the inner side of the L-shaped plate 601, and the inner side of the first spring 604 is fixedly connected to the outer side of the first clamping wheel 605;

[0033] By disengaging the one-way engagement of the first clamping wheel 605 and the second clamping wheel 606 , the movable plate 12 is raised, so that different types of containers can be fixed.

[0034] The outer surface of the connecting rod 603 is fixedly connected with a first limiting plate 602;

[0035] The first limiting plate 602 is provided to facilitate limiting the connection rod 603 .

[0036] A second spring 16 is provided on the movable sleeve of the surface of the limiting rod 15, the top of the second spring 16 is fixedly connected to the bottom of the movable plate 12, and the bottom of the second spring 16 is fixedly connected to the top of the workbench 1;

[0037] The first limiting plate 602 is pulled outward by the second spring 16, so that the first clamping wheel 605 and the second clamping wheel 606 are disengaged from the one-way engagement, thereby facilitating the fixing of the container.

[0038] The inner cavity of the moving plate 12 is fixedly connected with a sliding rod 13, and the surface of the sliding rod 13 is slidably connected with the inner cavity of the adjusting plate 8;

[0039] The slide bar 13 is provided to limit the adjustment plate 8 so as to facilitate the horizontal movement of the adjustment plate 8 .

[0040] The left and right sides of the slide bar 13 are both fixedly connected with second limiting plates 14 .

[0041] The top of the adjustment plate 8 is fixedly connected with a first connection plate 5, the top of the first connection plate 5 is fixedly connected with a second connection plate 4, the inner cavity of the second connection plate 4 is fixedly provided with a glass electrode assembly 7, the top of the glass electrode assembly 7 is fixedly provided with a wire 3, the top of the workbench 1 is fixedly provided with a detector 2, and the output end of the detector 2 is electrically connected to one end of the wire 3;

[0042] By setting up the detector 2, the glass electrode assembly 7 can detect the pH value of the solution, and the detection result is more accurate.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0044] During operation, the container is placed at the bottom of the gap between the second connecting rod assembly 10 and the first connecting rod assembly 11, and the movable plate 12 is pressed down, so that the movable plate 12 drives the gear 18 to descend, and the gear 18 starts to rotate forward through the tooth plate 19, thereby driving the bidirectional screw rod 17 to start to rotate forward, so that the adjustment plate 8 moves inward synchronously, driving the second connecting rod assembly 10 and the first connecting rod assembly 11 to open, so that the container is located inside the first connecting rod assembly 11 and the second connecting rod assembly 10. At this time, the first limit plate 602 is pulled outward through the second spring 16, so that the first clamping wheel 605 and the second clamping wheel 606 are disengaged from the one-way meshing, so that the movable plate 12 The first limiting plate 602 is released, and the positions of the first connecting rod assembly 11 and the second connecting rod assembly 10 are limited by the second clamping wheel 606 and the first clamping wheel 605, so as to prevent the first connecting rod assembly 11 and the second connecting rod assembly 10 from loosening, causing the liquid in the container to flow, and causing the glass electrode assembly 7 to measure inaccurately. When the glass electrode assembly 7 detects the water in the container, it will not be affected by any reaction force caused by gravity. The glass electrode assembly 7 detects the pH value of the solution through the detector 2, and the detection result is more accurate.

[0045] Glass electrode detection: The main part of the glass electrode is a glass bulb. The lower half of the bulb is a glass film that selectively responds to H+. The bulb is filled with a 0.1 mol·L-1 HCL internal reference solution with a certain pH. An Ag-AgCl electrode is inserted into it as an internal reference electrode, thus forming a glass electrode. The potential of the internal reference electrode in the glass electrode is constant and has nothing to do with the pH of the solution to be tested. The reason why the glass electrode can measure the pH of the solution is that the membrane potential generated by the glass membrane is related to the pH of the solution to be tested. The glass electrode must be immersed in an aqueous solution for a certain period of time before use. A hydrated silica gel layer is formed on the outer surface of the glass membrane. Due to the effect of the reference solution, an inner hydrated silica gel layer is also formed on the inner surface of the glass. When the soaked glass electrode is immersed in the solution to be tested, the hydrated layer contacts the solution. Due to the different H+ activities on the surface of the silica gel layer and the solution, an activity difference is formed, and H+ migrates from the side with high activity to the side with low activity. The silica gel layer establishes a balance with the H+ in the solution, which changes the charge distribution at the interface between the gel and the liquid, and generates a certain interfacial potential. Similarly, there is a certain interfacial potential at the interface between the hydrated silica gel layer on the inner side of the glass membrane and the internal solution. Because the properties of the inner and outer surfaces of the glass membrane are basically the same, it means that at a certain temperature, the membrane potential of the glass electrode is linearly related to the pH of the test solution.

Claims

1. An instrument for detecting the pH value of drinking water, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a limit rod (15), the surface of the limit rod (15) is movably sleeved with a movable plate (12), the inner cavity of the movable plate (12) is movably connected to a bidirectional screw rod (17) via a bearing, the left and right sides of the surface of the bidirectional screw rod (17) are threadedly sleeved with adjustment plates (8), the outer surface of the adjustment plate (8) is fixedly provided with a limit assembly (6), the top of the adjustment plate (8) is fixedly connected to a support plate (9), the top of the left support plate (9) is movably provided with a first connecting rod assembly (11) via a bearing, and the top of the right support plate (9) is movably provided with a second connecting rod assembly (10) via a bearing, the left and right sides of the top of the workbench (1) are fixedly connected to toothed plates (19), and the surface of the toothed plates (19) is meshed with a gear (18); The limiting assembly (6) includes an L-shaped plate (601), the inner cavity of the L-shaped plate (601) is slidably connected to a connecting rod (603), the inner surface of the connecting rod (603) is fixedly connected to a first clamping wheel (605), the outer surface of the bidirectional screw rod (17) is fixedly connected to a second clamping wheel (606), and the inner side of the first clamping wheel (605) and the outer side of the second clamping wheel (606) are unidirectionally meshed.

2. The pH value detection instrument for drinking water according to claim 1, characterized in that: The inner cavity of the first connecting rod assembly (11) and the inner cavity of the second connecting rod assembly (10) are movably connected via a rotating shaft.

3. The pH value detection instrument for drinking water according to claim 1, characterized in that: The inner cavity of the gear (18) is fixedly connected to the surface of the bidirectional screw rod (17).

4. The pH value detection instrument for drinking water according to claim 1, characterized in that: The surface of the connecting rod (603) is movably sleeved with a first spring (604), the outer side of the first spring (604) is fixedly connected to the inner side of the L-shaped plate (601), and the inner side of the first spring (604) is fixedly connected to the outer side of the first clamping wheel (605).

5. The pH value detection instrument for drinking water according to claim 1, characterized in that: A first limiting plate (602) is fixedly connected to the outer surface of the connecting rod (603).

6. The pH value detection instrument for drinking water according to claim 1, characterized in that: A second spring (16) is movably sleeved on the surface of the limiting rod (15); the top of the second spring (16) is fixedly connected to the bottom of the movable plate (12); and the bottom of the second spring (16) is fixedly connected to the top of the workbench (1).

7. The pH value detection instrument for drinking water according to claim 1, characterized in that: The inner cavity of the movable plate (12) is fixedly connected to a sliding rod (13), and the surface of the sliding rod (13) is slidably connected to the inner cavity of the adjustment plate (8).

8. The pH value detection instrument for drinking water according to claim 7, characterized in that: The left and right sides of the sliding rod (13) are both fixedly connected with second limiting plates (14).

9. The pH value detection instrument for drinking water according to claim 1, characterized in that: The top of the adjustment plate (8) is fixedly connected to a first connecting plate (5), the top of the first connecting plate (5) is fixedly connected to a second connecting plate (4), the inner cavity of the second connecting plate (4) is fixedly provided with a glass electrode assembly (7), the top of the glass electrode assembly (7) is fixedly provided with a wire (3), and the top of the workbench (1) is fixedly provided with a detector (2), and the output end of the detector (2) is electrically connected to one end of the wire (3).

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