Rapid detection kit for corrosivity of water sample in engineering investigation

Abstract

The utility model provides a rapid detection kit for water sample corrosivity in engineering investigation, which comprises an upper box body and a lower box body, the upper box body and the lower box body are connected through a supporting rod, a funnel-shaped water sample collecting area is arranged in the upper box body, an activated carbon adsorption bin is arranged at the bottom of the water sample collecting area, and a water sample collecting area is arranged in the activated carbon adsorption bin. Three sample feeding pipelines are uniformly connected to the side surface of the activated carbon adsorption bin, a detection workbench is arranged on the upper surface of the lower box body, three drawers which are distributed in a fan shape are arranged in the lower box body, and the three drawers are respectively a SO4 < 2-> reagent area, a pH reagent area and a Cl <-> reagent area. The water sample treatment box is simple in structure and reasonable in design, facilitates water sample treatment, experimental operation and reagent carrying, and has high practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of water sample corrosivity detection, in particular to a rapid detection kit for water sample corrosivity in engineering investigation. Background Technique

[0002] With the continuous development of modern infrastructure construction, the damage of adverse environmental conditions to engineering construction has attracted more and more attention. Affected by factors such as geographical location and climate environment, there are differences in the content of dissolved chemical ions in surface water and groundwater in the engineering site, which will corrode building materials such as steel bars and concrete to varying degrees. Therefore, during the investigation process, it is necessary to collect on-site samples and conduct test analysis on representative samples according to specifications to obtain accurate corrosivity evaluation indicators. It has become an important link that cannot be ignored in engineering construction to comprehensively understand the characteristics of environmental media and their corrosivity to building structures, test and analyze relevant corrosivity parameters in a targeted manner, so as to take safe and reasonable protection measures.

[0003] However, there are problems such as non-standard sampling and unreasonable packaging by survey technicians at the engineering site. At the same time, due to the long logistics cycle, the water quality of the samples may change during transportation. The indoor water quality corrosivity analysis test involves many parameters and has a long detection cycle, and the reflection of the test results often has a certain lag.

[0004] Taking the requirements of the "Code for Geotechnical Engineering Investigation" (GB50021-2001) (2009 edition) to conduct indoor tests on the corrosivity of water samples of each project, it is found after evaluation that the exceeding of the three indicators of SO4 2- , Cl - , and pH is the reason for the corrosivity of the vast majority of water samples. And there is no rapid detection kit specifically for survey technicians to judge on-site whether such indicators are corrosive. Content of the Utility Model

[0005] Aiming at the deficiencies of the above-mentioned prior art, the utility model provides a rapid detection kit for water sample corrosivity in engineering investigation. The kit is provided with a water sample collection area, a detection workbench and a reagent storage area. The kit has a compact structure, reasonable zoning, is convenient to use and carry, enables testers to not need to rely on complex instrument equipment, and at the same time does not require professional knowledge and training in the field of test analysis. Only by following the operation steps of the implementation method, the determination of a water sample can be completed within 3-5 minutes.

[0006] The technical solution provided by the present utility model: A rapid detection kit for the corrosiveness of water samples in engineering surveys, comprising an upper box body and a lower box body, which are connected by a support rod. A funnel-shaped water sample collection area is provided inside the upper box body. An activated carbon adsorption bin is provided at the bottom of the water sample collection area. Three sample delivery pipes are evenly connected to the side of the activated carbon adsorption bin. A detection workbench is provided on the upper surface of the lower box body. Three fan-shaped drawers are provided inside the lower box body. Drawer I, Drawer II, and Drawer III are respectively the SO4 2- reagent area, pH reagent area, and Cl - reagent area.

[0007] Furthermore, the sample delivery pipes include Sample Delivery Pipe I, Sample Delivery Pipe II, and Sample Delivery Pipe III. Water discharge holes I, II, and III are respectively provided at the corresponding positions of the bottom surface of the upper box body and the outlets of the three sample delivery pipes. Valves I, II, and III are respectively provided at the outlets of Sample Delivery Pipe I, Sample Delivery Pipe II, and Sample Delivery Pipe III.

[0008] Furthermore, grooves I, II, and III are respectively provided at the corresponding positions of the detection workbench and the three water discharge holes for placing sample cups and colorimetric tubes.

[0009] Furthermore, in the SO4 2- reagent area, there are stoppered colorimetric tubes, SO4 2- color scales, barium chloride solution reagent bottles, weighing spoons, and dropper slots.

[0010] Furthermore, in the pH reagent area, there are bromocresol purple reagent bottles, colorimetric slots, and pH reaction cups.

[0011] Furthermore, in the Cl - reagent area, there are potassium chromate reagent bottles, silver nitrate reagent bottles, rubber head droppers, quantitative pipette slots, and Cl - reaction cups.

[0012] Furthermore, slide rails I, II, and III are respectively provided at the corresponding positions of the bottom surface of the lower box body and the three drawers for controlling the opening and closing of the drawers. Handles are provided on the outside of the drawers, and buffer foam plastics are laid inside.

[0013] Furthermore, the buffer foam plastics are made of polyethylene with a thickness of 5 cm.

[0014] Furthermore, the upper box body and the lower box body are made of hard plastics, and the tabletop of the detection workbench is made of epoxy resin.

[0015] Furthermore, a handle is provided at the top of the upper box body.

[0016] The beneficial effects of the present utility model:

[0017] (1) The utility model uses activated carbon to filter large particle impurities and pigments in the water sample to be measured, controls the flow rate of the water sample to be measured with a valve, and collects the filtered water sample in a reaction cup and a colorimetric tube. Subsequently, by pre-mixing reagents with appropriate concentrations and dosages and supplemented with an indicator, on-site detection of the water sample is completed on the detection workbench. Finally, the change critical points of the water sample color and turbidity are corresponded to the corrosivity limit values to achieve on-site determination, providing instructions and references for engineering surveys.

[0018] (2) The structure of the utility model is compact and easy to carry, facilitating water sample treatment, experimental operation, and sample disposal. The reagent compartment is reasonably partitioned and easy to use. The utility model effectively solves the demand for rapid qualitative analysis of on-site water corrosivity in the current engineering survey field, solves the pain point of difficult on-site determination, and alleviates problems such as slow sample transportation, water quality change, and time-consuming test results. Description of the Drawings

[0019] Figure 1 and Figure 2 are schematic structural diagrams of the box body of the utility model in the closed state from different angles;

[0020] Figure 3 is a schematic structural diagram of the box body of the utility model in the open state;

[0021] Figure 4 is a top view schematic diagram of the utility model in the open state.

[0022] Figure 5 is a cross-sectional schematic diagram of the upper box body of the utility model.

[0023] Figure 6 is a schematic structural diagram of the lower box body of the utility model after removing the drawer.

[0024] In the figure: upper box body 1; activated carbon adsorption chamber 2, sample delivery pipeline I 3, sample delivery pipeline II 4, sample delivery pipeline III 5; water discharge hole I 6, water discharge hole II 7, water discharge hole III 8; valve I 9, valve II 10, valve III 11; detection workbench 12, groove I 13, groove II 14, groove III 15; drawer I 16, drawer II 17, drawer III 18; slide rail I 19, slide rail II 20, slide rail III 21; buffer foam plastic 22; stoppered colorimetric tube 23; SO4 2- color scale 24; barium chloride solution reagent bottle 25; weighing spoon and dropper card slot 26; lower box body 27; bromocresol purple reagent bottle 28; colorimetric card slot 29; pH reaction cup 30; support rod 31; potassium chromate reagent bottle 32; silver nitrate reagent bottle 33; rubber head dropper and quantitative pipette card slot 34; Cl - reaction cup 35; handle 36. Detailed Embodiments

[0025] The present utility model will be further described below in conjunction with specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams rather than physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the specific embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Based on the specific embodiments of the present utility model, all other specific embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "front", "rear", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] As Figure 1-6 shown, a rapid detection kit for the corrosiveness of water samples in engineering surveys includes an upper box body 1 and a lower box body 27. The upper box body 1 and the lower box body 27 are connected by a support rod 31. A funnel-shaped water sample collection area is provided inside the upper box body 1. An activated carbon adsorption bin 2 is provided at the bottom of the water sample collection area. Three sample delivery pipes are evenly distributed and connected to the side surface of the activated carbon adsorption bin 2. A detection workbench 12 is provided on the upper surface of the lower box body 27. Three fan-shaped drawers are provided inside the lower box body 27. Drawer I 16, Drawer II 17 and Drawer III 18 are respectively the SO4 2- reagent area, the pH reagent area and the Cl - reagent area.

[0029] The sample delivery pipelines include a sample delivery pipeline I 3, a sample delivery pipeline II 4, and a sample delivery pipeline III 5. At the corresponding positions of the bottom surface of the upper box body 1 and the outlets of the three sample delivery pipelines, there are respectively a water discharge hole I 6, a water discharge hole II 7, and a water discharge hole III 8. Valves I 9, II 10, and III 11 are respectively arranged at the outlets of the sample delivery pipeline I 3, the sample delivery pipeline II 4, and the sample delivery pipeline III 5.

[0030] At the corresponding positions of the detection workbench 12 and the three water discharge holes, there are respectively a groove I 13, a groove II 14, and a groove III 15, which are used to place sample cups and colorimetric tubes to avoid accidents caused by tipping during the experiment.

[0031] The SO4 2- In the reagent area, there are stoppered colorimetric tubes 23, SO4 2- color scales 24, barium chloride solution reagent bottles 25, and weighing spoons and dropper card slots 26.

[0032] In the pH reagent area, there are bromocresol purple reagent bottles 28, colorimetric card slots 29, and pH reaction cups 30.

[0033] The Cl - In the reagent area, there are potassium chromate reagent bottles 32, silver nitrate reagent bottles 33, rubber head dropper and volumetric pipette card slots 34, and Cl - reaction cups 35.

[0034] At the corresponding positions of the bottom surface of the lower box body 27 and the three drawers, there are respectively a slide rail I 19, a slide rail II 20, and a slide rail III 21, which are used to control the opening and closing of the drawers. A handle is arranged on the outer side of the drawers, and a buffer foam plastic 22 is laid inside the drawers. The buffer foam plastic 22 is made of polyethylene with a thickness of 5 cm and is used to fix reagent bottles and operating utensils.

[0035] The upper box body 1 and the lower box body 27 are made of hard plastic. The tabletop of the detection workbench 12 is made of epoxy resin material to prevent reagent corrosion and is easy to clean after detection. A handle 36 is arranged at the top of the upper box body 1 to facilitate the movement of the reagent kit.

[0036] The upper water sample collection area is funnel-shaped and is used to hold the water sample to be tested. The activated carbon adsorption bin at the bottom of the collection area is used to filter large particle impurities and pigments in the water sample to be tested, facilitating the observation of subsequent color reactions. The water sample filtered by the activated carbon flows out from the water discharge hole through the sample delivery pipeline, and the water flow is controlled by a valve.

[0037] Specifically, the stoppered colorimetric tube 23 has a specification of 10 mL, is made of transparent glass, and the tube wall is marked with 5 mL and 10 mL scale lines.

[0038] SO4 2-The specification of the color scale 24 is 10 mL, made of transparent glass. The preparation method is as follows: Weigh 0.1480 g of anhydrous sodium sulfate (analytical reagent grade) that has been dried at 105 - 110 °C for 2 h. Dissolve it in an appropriate amount of water, dilute it to 1000 mL with deionized water, and mix well for later use. Take 10 mL, add 0.2 g of barium chloride, mix well to obtain the color scale, store it in a reagent kit, and it can be used for a long time.

[0039] The specification of the barium chloride solution reagent bottle 25 is 200 mL, made of transparent glass. The preparation method of the barium chloride solution is as follows: Weigh 4 g of barium chloride (BaCl2·2H2O) and dissolve it in deionized water, add 4 mL of (1 + 1) hydrochloric acid for acidification, then dilute it to 200 mL with deionized water, mix well, and store it for a long time.

[0040] The specification of the bromocresol purple reagent bottle 28 is 100 mL, made of brown glass. The preparation method of the bromocresol purple is as follows: Dissolve 0.1 g of bromocresol purple in 100 mL of 20% ethanol.

[0041] The specification of the pH reaction cup 30 is 50 mL, made of transparent glass, with a 25 mL graduation line.

[0042] The specification of the potassium chromate reagent bottle 32 is 100 mL, made of brown glass. The preparation method of the potassium chromate reagent is as follows: Dissolve 10 g of potassium chromate in an appropriate amount of distilled water, add silver nitrate solution until a faint reddish-brown precipitate appears, let it stand, filter, and dilute it to 100 mL.

[0043] The specification of the silver nitrate reagent bottle 33 is 200 mL, made of brown glass. The preparation method of the silver nitrate reagent is as follows: Weigh 1.1976 g of silver nitrate and make the volume up to 200 ml with deionized water, shake well. Store the solution in a brown bottle.

[0044] The specification of the volumetric pipette is 2 mL, made of transparent glass.

[0045] Cl - The specification of the reaction cup 35 is 50 mL, made of transparent glass, with a 25 mL graduation line.

[0046] When the present utility model is specifically used, the operation steps are as follows:

[0047] (1) Take the water sample to be tested and collect it in the water sample collection area.

[0048] (2) Take the stoppered colorimetric tube, pH reaction cup, and Cl - reaction cup from the reagent storage drawer, and place them respectively in the corresponding grooves on the detection workbench for fixed placement.

[0049] (3) Press the corresponding valve to control the water flow rate so that the water sample collected in the stoppered colorimetric tube reaches the 5 mL graduation line, and the water sample collected in the pH reaction cup reaches the 25 mL graduation line, and Cl- Collect the water sample in the reaction cup up to the 25 mL graduation line.

[0050] (4) Use a dropper to suck up the prepared barium chloride solution, add the solution to the stoppered colorimetric tube up to the 10 mL graduation line, shake well and let stand for 2 - 3 minutes, and observe the change in its turbidity.

[0051] (5) Use a dropper to suck up the bromocresol purple indicator, drop 2 - 3 drops into the pH reaction cup, shake well and let stand for 2 - 3 minutes, and observe its color.

[0052] (6) Use a dropper to suck up the potassium chromate indicator, drop 2 - 3 drops into the Cl - reaction cup, shake well and use a volumetric pipette to add 2 mL of silver nitrate solution to the Cl - reaction cup, let stand for 2 - 3 minutes, and observe its color.

[0053] (7) After the detection is completed, drain the remaining water in the pipeline and rinse the water sample collection area and the sample delivery pipeline with clean water.

[0054] This utility model realizes on-site water sample collection and filtration in the water sample collection area; subsequently, the sample cup and the colorimetric tube are fixedly placed through the sample placement groove of the detection platform, and the water sample is divided and quantitatively collected through the valve; finally, based on the reagents provided in the reagent kit, setting its concentration and dosage, and based on the corrosiveness judgment limits of SO4 2- 、Cl - 、pH in the "Code for Geotechnical Engineering Investigation" (GB50021 - 2001), by using the color change and turbidity change of the water sample after being treated with the reagent, the corrosiveness of the water sample can be quickly judged on-site.

[0055] Prepare two water samples, conduct indoor tests on the pH, chloride ion, and sulfate radical of the water samples by the methods specified in the "Code for Water Quality Analysis of Railway Engineering" (TB10104 - 2003), and obtain the water sample data as shown in Table 1:

[0056] Table 1 Water Sample Detection Data

[0057] Serial number pH <![CDATA[Cl - (mg / L)]]> <![CDATA[SO4 2- (mg / L)]]> Water sample 1 7.34 44.3 32.0 Water sample 2 4.65 236.8 385.2

[0058] Use the usage steps of this utility model to conduct on-site detection on water samples 1 and 2.

[0059] SO4 2- Corrosiveness judgment: Compare the turbidity of the standing water sample with the color scale. Water sample 1 is clearer than the color scale, and water sample 2 is turbid than the color scale. According to the "Code for Geotechnical Engineering Investigation" (GB50021 - 2001), it is determined that water sample 1 is slightly corroded by SO4 2- in Class I environment, and it is determined that water sample 2 has corrosiveness affected by SO4 2- in Class I environment.

[0060] Judgment of pH corrosion: Water sample 1 is purple, and water sample 2 is yellow. According to the "Code for Geotechnical Exploration" (GB50021 - 2001), it is determined that water sample 1 has slight pH corrosion, and water sample 2 has pH corrosion in both Class A and Class B environments.

[0061] Cl - Corrosion judgment: Water sample 1 is reddish - brown, and water sample 2 is yellow - green. According to the "Code for Geotechnical Exploration" (GB50021 - 2001), it is determined that water sample 1 has slight Cl - corrosion, and water sample 2 has corrosion affected by Cl - under wet - dry alternating conditions.

[0062] The test results show that the test kit has a short time consumption for the judgment of pH, Cl - , SO4 2- indexes, the results are obvious and easy to observe, which are consistent with the judgment results obtained from laboratory tests and have practical value.

[0063] Finally, it should be noted that the above - mentioned are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rapid test kit for the corrosiveness of water samples in engineering surveys, characterized in that: The invention comprises an upper box body (1) and a lower box body (27), wherein the upper box body (1) and the lower box body (27) are connected via a support rod (31), wherein a funnel-shaped water sample collection area is arranged in the upper box body (1), an activated carbon adsorption chamber (2) is arranged at the bottom of the water sample collection area, and three sample delivery pipes are evenly distributed and connected to the side of the activated carbon adsorption chamber (2), wherein a detection workbench (12) is arranged on the upper surface of the lower box body (27), and three drawers distributed in a fan shape are arranged inside the lower box body (27), wherein drawer I (16), drawer II (17) and drawer III (18) are SO4 2- Reagent area, pH reagent area and Cl - Reagent area.

2. A rapid test kit for water sample corrosivity in engineering survey according to claim 1, characterized in that: The sample delivery pipeline comprises a sample delivery pipeline I (3), a sample delivery pipeline II (4) and a sample delivery pipeline III (5); a drain hole I (6), a drain hole II (7) and a drain hole III (8) are respectively arranged at the bottom surface of the upper box body (1) and the positions corresponding to the outlets of the three sample delivery pipelines; and a valve I (9), a valve II (10) and a valve III (11) are respectively arranged at the outlets of the sample delivery pipeline I (3), the sample delivery pipeline II (4) and the sample delivery pipeline III (5).

3. A rapid test kit for water sample corrosivity in engineering survey according to claim 2, characterized in that: The detection workbench (12) is provided with grooves I (13), II (14) and III (15) at positions corresponding to the three drain holes, respectively, for placing sample cups and colorimetric tubes.

4. The rapid detection kit for water sample corrosivity in engineering investigation according to claim 1, characterized in that: The SO4 2- The reagent area is equipped with a stoppered colorimetric tube (23), SO4 2- Color scale (24), barium chloride solution reagent bottle (25) and weighing spoon and dropper slot (26).

5. The rapid detection kit for water sample corrosivity in engineering investigation according to claim 1, characterized in that: The pH reagent area is provided with a bromocresol purple reagent bottle (28), a colorimetric card slot (29) and a pH reaction cup (30).

6. A rapid test kit for water sample corrosivity in engineering survey according to claim 1, characterized in that: The Cl - The reagent area is provided with a potassium chromate reagent bottle (32), a silver nitrate reagent bottle (33), a rubber-tipped dropper and a quantitative pipette slot (34) and a Cl - Reaction cup (35).

7. A rapid test kit for water sample corrosivity in engineering survey according to claim 1, characterized in that: The bottom surface of the lower box body (27) is provided with a slide rail I (19), a slide rail II (20) and a slide rail III (21) at positions corresponding to the three drawers, respectively, for controlling the opening and closing of the drawers. A handle is provided on the outside of the drawer, and a cushioning foam plastic (22) is paved inside the drawer.

8. A rapid test kit for water sample corrosivity in engineering survey according to claim 7, characterized in that: The material of the buffer foam plastic (22) is polyethylene and has a thickness of 5 cm.

9. A rapid test kit for water sample corrosivity in engineering survey according to claim 1, characterized in that: The upper box body (1) and the lower box body (27) are made of hard plastic, and the table top of the detection workbench (12) is made of epoxy resin.

10. A rapid test kit for water sample corrosivity in engineering survey according to claim 1, characterized in that: A handle (36) is provided on the top of the upper box body (1).

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