Water hardness analyzing and testing device

Abstract

The utility model relates to the technical field of water quality detection, and provides a water quality hardness analyzing and testing device which comprises a testing tube, a first titration branch tube, a second titration branch tube, a water inlet connecting assembly and a water outlet connecting assembly, and the first titration branch tube and the second titration branch tube are vertically arranged on the testing tube and communicated with the testing tube. An indicator is arranged in the first titration branch pipe, an EDTA (Ethylene Diamine Tetraacetic Acid) solution is arranged in the second titration branch pipe, two ends of the test pipe are respectively communicated and connected with the water inlet connecting assembly and the water outlet connecting assembly, the test pipe is provided with scale marks, the first titration branch pipe and the second titration branch pipe are arranged close to one end of the test pipe, and the indicator is a phenolphthalein indicator. The water hardness tester is reasonable in structure and convenient to use, and can be used for well analyzing and testing the water hardness.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to a water quality hardness analysis and testing device. Background Art

[0002] Water is divided into soft water and hard water. Water that does not contain or contains a small amount of calcium and magnesium ions is called soft water, and water that does not contain calcium and magnesium ions is called hard water. If the hardness of water is caused by sodium bicarbonate or magnesium bicarbonate, it is temporary hard water (when boiling temporary hard water, the decomposed sodium bicarbonate and the natural insoluble carbonates are precipitated, and the water changes from hard water to soft water); if it is caused by sulfates or chlorides containing calcium and magnesium, it is permanent hard water and cannot be removed after boiling. The above two types of hardness are collectively called total hardness.

[0003] As disclosed in application number: CN201821322267.2, a water hardness detection device includes a water inlet pipe, a test box, a water outlet pipe and an infrared transceiver; a piston and a resin are arranged inside the test box, and the piston is located on the infrared light line of the infrared transceiver.

[0004] However, the above device adopts the principle of resin adsorption and expansion, and there are the following two problems: 1. The change of resin adsorption and expansion is multi-dimensional. The above device only measures the axial expansion of the resin through the piston, and it is difficult to clearly detect the water hardness; 2. The piston will give the resin a resistance when it is about to move in the test box, resulting in the resin cannot fully expand, thereby affecting the water hardness detection. Utility Model Content

[0005] In order to solve the above problem, the utility model provides a water hardness analysis and testing device to solve the problem.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A water hardness analysis and testing device comprises: a test tube, a first titration branch, a second titration branch, a water inlet connection assembly and a water outlet connection assembly, wherein the first titration branch and the second titration branch are vertically arranged on the test tube and are connected to the test tube, an indicator is arranged in the first titration branch, an EDTA solution is arranged in the second titration branch, and two ends of the test tube are respectively connected to the water inlet connection assembly and the water outlet connection assembly.

[0008] Preferably, the test tube is provided with scale marks.

[0009] Preferably, the first titration branch and the second titration branch are arranged close to one end of the test tube.

[0010] Preferably, the indicator is a phenolphthalein indicator.

[0011] Preferably, the first titration branch is provided with a first injection valve and a first storage valve, the first injection valve is provided close to the test tube, the first storage valve is provided close to a port of the first titration branch, and the port of the first titration branch is open.

[0012] Preferably, the second titration branch is provided with a second injection valve and a second storage valve, the second injection valve is arranged close to the test tube, the second storage valve is arranged close to the port of the second titration branch, and the port of the second titration branch is open.

[0013] Preferably, the water inlet connection assembly comprises: a water inlet pipe, a water inlet connection sleeve and a water inlet valve, the water inlet pipe is connected to the water inlet of the test tube through the water inlet connection sleeve, and the water inlet valve is arranged on the water inlet pipe.

[0014] Preferably, the water outlet connection assembly comprises: a water outlet pipe, a water outlet connection sleeve, a water outlet valve and a hanging ring, the water outlet pipe is connected to the water outlet of the test tube through the water outlet connection sleeve, the water outlet valve is arranged on the water inlet pipe, and the hanging ring is sleeved on the outer wall of the water outlet connection sleeve.

[0015] The advantages of the utility model are as follows: the utility model adopts the EDTA titration method to replace the resin adsorption expansion method, so as to better analyze and test the water hardness; by setting a first titration branch tube filled with an indicator, it is convenient to directly add the indicator to the test tube; by setting a second titration branch tube filled with EDTA solution, it is convenient to add the test agent to the solution to which the indicator has been added, and it is convenient to use; by setting scale lines on the test tube, it is convenient to record the change of the solution volume in the test tube at each stage, so as to calculate the concentration of calcium ions in the sample and then calculate the water hardness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the first titration branch of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the second titration branch of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the water inlet connection assembly of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the water outlet connection assembly of the utility model.

[0022] Description of reference numerals:

[0023] 1. Test tube; 2. First titration branch; 3. Second titration branch; 4. Water inlet connection assembly; 5. Water outlet connection assembly; 21. First liquid injection valve; 22. First liquid storage valve; 31. Second liquid injection valve; 32. Second liquid storage valve; 41. Water inlet pipe; 42. Water inlet connecting sleeve; 43. Water inlet valve; 51. Water outlet pipe; 52. Water outlet connecting sleeve; 53. Water outlet valve; 54. Hanging ring. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] Embodiment 1, combined with Figure 1 To explain:

[0028] A water hardness analysis and testing device comprises: a test tube 1, a first titration branch 2, a second titration branch 3, a water inlet connection assembly 4 and a water outlet connection assembly 5, wherein the first titration branch 2 and the second titration branch 3 are vertically arranged on the test tube 1 and communicated with the test tube 1, an indicator is arranged in the first titration branch 2, an EDTA solution is arranged in the second titration branch 3, two ends of the test tube 1 are respectively connected with the water inlet connection assembly 4 and the water outlet connection assembly 5, the test tube 1 is provided with scale lines, the first titration branch 2 and the second titration branch 3 are arranged near one end of the test tube 1, and the indicator is a phenolphthalein indicator.

[0029] With such a configuration, by adopting the EDTA titration method instead of the resin adsorption swelling method, the water hardness can be better analyzed and tested. By setting a first titration branch 2 filled with an indicator, it is convenient to directly add the indicator to the test tube 1. By setting a second titration branch 3 filled with EDTA solution, it is convenient to add the test agent to the solution to which the indicator has been added, which is convenient to use. By setting scale lines on the test tube 1, it is convenient to record the changes in the volume of the solution in the test tube 1 at each stage, thereby calculating the concentration of calcium ions in the sample and then calculating the water hardness.

[0030] Embodiment 2, based on embodiment 1, combined with Figure 2 To explain:

[0031] The first titration branch 2 is provided with a first injection valve 21 and a first liquid storage valve 22. The first injection valve 21 is provided close to the test tube 1, and the first liquid storage valve 22 is provided close to the port of the first titration branch 2. The port of the first titration branch 2 is open.

[0032] In this configuration, the first injection valve 21 is provided to facilitate the addition of the reagent pre-filled in the first titration branch 2 to the test tube 1, the first liquid storage valve 22 is provided to prevent the pre-filled reagent from leaking out of the first titration branch 2, and the opening of the first titration branch 2 facilitates the filling of the reagent into the first titration branch 2.

[0033] Embodiment 3, based on embodiment 2, combined with Figure 3 To explain:

[0034] The second titration branch 3 is provided with a second injection valve 31 and a second liquid storage valve 32. The second injection valve 31 is arranged close to the test tube 1, and the second liquid storage valve 32 is arranged close to the port of the second titration branch 3. The port of the second titration branch 3 is open.

[0035] In this way, the second injection valve 31 is provided to facilitate the addition of the reagent pre-filled in the second titration branch 3 to the test tube 1, the second liquid storage valve 32 is provided to prevent the pre-filled reagent from leaking out of the second titration branch 3, and the open second titration branch 3 is provided to facilitate the filling of the reagent into the second titration branch 3.

[0036] Embodiment 4, based on embodiment 3, combined with Figure 4 To explain:

[0037] The water inlet connection assembly 4 includes: a water inlet pipe 41 , a water inlet connection sleeve 42 and a water inlet valve 43 . The water inlet pipe 41 is connected to the water inlet of the test tube 1 through the water inlet connection sleeve 42 , and the water inlet valve 43 is arranged on the water inlet pipe 41 .

[0038] In this way, the water inlet connection sleeve 42 is sealed with the water inlet pipe 41 and the test tube 1 respectively, and modular assembly is adopted to facilitate installation and maintenance. The water inlet valve 43 can prevent the solution in the test tube 1 from leaking out of the water inlet pipe 41.

[0039] Embodiment 5, based on embodiment 4, combined with Figure 5 To explain:

[0040] The water outlet connection assembly 5 includes: a water outlet pipe 51, a water outlet connection sleeve 52, a water outlet valve 53 and a hanging ring 54. The water outlet pipe 51 is connected to the water outlet of the test tube 1 through the water outlet connection sleeve 52, the water outlet valve 53 is arranged on the water inlet pipe 41, and the hanging ring 54 is sleeved on the outer wall of the water outlet connection sleeve 52.

[0041] In this way, the water outlet connection sleeve 52 is sealed with the water outlet pipe 51 and the test tube 1 respectively, and modular assembly is adopted to facilitate installation and maintenance. The water outlet valve 53 can prevent the solution in the test tube 1 from leaking out of the water outlet pipe 51, and the hanging ring 54 is provided to facilitate manual operation of the test tube 1.

[0042] Working principle of the utility model: when the utility model is in use, the indicator and EDTA solution are added to the first titration branch 2 and the second titration branch 3 in advance, and leakage is prevented by closing the liquid storage valve, and then an appropriate amount of test solution is added into the test tube 1 through the water inlet connection component 4 and the water outlet connection component 5, and then the water inlet valve 43 and the water outlet valve 53 are closed, and the test solution dosage is read and recorded through the scale line, and then the test tube 1 is placed horizontally, and the first injection valve 21 is opened to add phenolphthalein indicator to the test solution, and the test tube 1 is placed vertically, and the test solution dosage is read and recorded through the scale line, and then the test tube 1 is placed horizontally, and the second injection valve 31 is opened to slowly add EDTA solution to the test solution until the test solution changes from red to colorless, and the test tube 1 is placed vertically, and then the test solution dosage is read and recorded through the scale line, and the calcium ion concentration in the test solution is calculated through the above-mentioned recorded results, so as to obtain the water hardness. The utility model has a reasonable structure and is easy to use, and can be used for analyzing and testing water hardness.

[0043] For those skilled in the art, the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A water hardness analysis and testing device, characterized in that: include: A test tube (1), a first titration branch (2), a second titration branch (3), a water inlet connection assembly (4) and a water outlet connection assembly (5); the first titration branch (2) and the second titration branch (3) are vertically arranged on the test tube (1) and are in communication with the test tube (1); an indicator is arranged in the first titration branch (2); an EDTA solution is arranged in the second titration branch (3); and two ends of the test tube (1) are respectively connected to the water inlet connection assembly (4) and the water outlet connection assembly (5).

2. A water hardness analysis and testing device according to claim 1, characterized in that: The test tube (1) is provided with scale lines.

3. A water hardness analysis and testing device according to claim 1, characterized in that: The first titration branch tube (2) and the second titration branch tube (3) are arranged close to one end of the test tube (1).

4. A water hardness analysis and testing device according to claim 1, characterized in that: The indicator is a phenolphthalein indicator.

5. A water hardness analysis and testing device according to claim 1, characterized in that: The first titration branch tube (2) is provided with a first liquid injection valve (21) and a first liquid storage valve (22); the first liquid injection valve (21) is provided close to the test tube (1); the first liquid storage valve (22) is provided close to a port of the first titration branch tube (2); and the port of the first titration branch tube (2) is open.

6. A water hardness analysis and testing device according to claim 1, characterized in that: The second burette branch tube (3) is provided with a second liquid injection valve (31) and a second liquid storage valve (32); the second liquid injection valve (31) is arranged close to the test tube (1); the second liquid storage valve (32) is arranged close to a port of the second burette branch tube (3); and the port of the second burette branch tube (3) is open.

7. A water hardness analysis and testing device according to claim 1, characterized in that: The water inlet connection assembly (4) comprises: a water inlet pipe (41), a water inlet connection sleeve (42) and a water inlet valve (43); the water inlet pipe (41) is connected to the water inlet of the test tube (1) via the water inlet connection sleeve (42); and the water inlet valve (43) is arranged on the water inlet pipe (41).

8. A water hardness analysis and testing device according to claim 1, characterized in that: The water outlet connection assembly (5) comprises: a water outlet pipe (51), a water outlet connection sleeve (52), a water outlet valve (53) and a hanging ring (54); the water outlet pipe (51) is connected to the water outlet of the test tube (1) via the water outlet connection sleeve (52); the water outlet valve (53) is arranged on the water inlet pipe (41); and the hanging ring (54) is sleeved on the outer wall of the water outlet connection sleeve (52).

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