CN111175309A - Pipeline water leakage detection agent and preparation method thereof - Google Patents

Abstract

The invention discloses a pipeline water leakage detection agent, which consists of 3-5 parts by weight of dye, 90-92 parts by weight of volatile oil phase solvent, 0.3-1 part by weight of other auxiliary agents and 2-6.7 parts by weight of surfactant. The invention also discloses a preparation method of the pipeline water leakage detection agent, which comprises the following specific steps: firstly, sequentially adding a dye, a surfactant, a volatile oil phase solvent and other auxiliaries into a reaction kettle at normal temperature, and sealing, stirring and mixing; secondly, the mixture obtained in the first step is passed through a grinder to reduce the particle size of the powder; thirdly, passing the mixture obtained in the second step through a 350-mesh screen; and fourthly, sampling the stock solution, testing the surface of the 0.2 micron crack pipeline, effectively displaying the judgment result that the stock solution is qualified, packaging the stock solution in a binary aerosol can mode, and selecting nitrogen as the propellant. The water leakage detection agent provided by the invention does not damage pipelines, has high sensitivity, is easy to clean and is not easy to deteriorate or lose efficacy.

Description

Pipeline water leakage detection agent and preparation method thereof

Technical Field

The invention relates to a water leakage detection agent for a pipeline and a preparation method thereof, which are used for detecting the integrity of a water supply pipeline and belong to the technical field of nondestructive testing.

Background

The pipeline leakage detection technology should be used for detecting a water supply pipeline or a water carrying container, and belongs to one of leakage detection. The principle of coloring indication is adopted to indicate the trace leakage of the pipeline or the container.

The pipeline water leakage detection agent utilizes the characteristic that sensitive water-soluble basic dye is dispersed in an oil phase solvent and does not develop color, the water-soluble dye is dispersed in volatile oil, and the volatile oil is sprayed on the surface of a workpiece to be detected to form a uniform dye powder film. When meeting the water leakage point, a clear color code indication is displayed on the powder film.

In order to simplify the operation steps in use and enhance the stability of detection, the pipeline water leakage detection agent uses an aerosol design to help the dye powder to be uniformly distributed in the application process.

At present, plastic steel, copper, galvanized pipe and other materials are used for water supply pipelines, water carrying containers and related valves. The pipeline water leakage detection agent is used for ensuring the stability of detection in the using process and not damaging the used workpiece, and the material safety is considered in the formula design, so that corrosive raw materials are avoided, and the whole acid value and trace elements are controlled. In order to ensure that trace residues after rough cleaning do not continuously influence workpiece materials in the future, halogenated substances and chlorides are not selected in the formula.

The characteristics of unitary aerosol packaging techniques require the mixing of the semimanufactured product with the aerosol propellant, which has a certain effect on the properties of the finished product, for example, coloration of the dye by part of the propellant, foaming during application due to improper propellant selection, and local refrigeration during aerosol application. In order to ensure the reliability of the inspection and the material safety of the inspected workpiece, a binary aerosol package is an ideal solution. The stable state of the dye can be ensured to the utmost extent by utilizing the characteristic of separation of the propellant and the propellant in the binary aerosol; meanwhile, unnecessary foaming phenomenon is avoided so as to ensure the uniformity and smoothness of the dye powder film; in addition, the propellant packaged by the binary aerosol cannot volatilize rapidly because of the propellant, so that the local temperature reduction of a working area is caused discretely, and the material safety of the workpiece in use can be better ensured.

Functionally, the pipeline water leakage detection agent should take the following aspects:

1. and (3) detection sensitivity. The device has the capability of detecting the trace amount of water leakage source and is indicated by an obvious color code.

2. Is easy to clean. The workpiece should be cleaned immediately after the inspection is completed to ensure that the system is stable and that no substances affecting the safety of the material should be left in trace amounts.

3. And (5) quick drying. To ensure the accuracy of the indication position, the drying speed of the pipe water leakage detecting agent should be ensured to be dried within 30 seconds and form a powder film.

Disclosure of Invention

The invention aims to provide a pipeline water leakage detection agent which is quick to dry, easy to clean, good in material safety and high in detection sensitivity so as to meet the detection requirements in use in production.

In order to solve the technical problems, the technical scheme of the invention is to provide a pipeline water leakage detection agent, which comprises 3-5 parts by weight of dye, 90-92 parts by weight of volatile oil phase solvent, 0.3-1 part by weight of other auxiliary agents and 2-6.7 parts by weight of surfactant.

Preferably, the dye is water-soluble basic turquoise blue B.

Preferably, the volatile oil phase solvent is a mixture of n-heptane and isohexane.

Preferably, the other auxiliary agent is hydroxypropyl cellulose.

Preferably, the surfactant is sodium diisobutylnaphthalenesulfonate.

The invention also provides a preparation method of the pipeline water leakage detection agent, which is characterized by comprising the following specific steps:

firstly, sequentially adding a dye, a surfactant, a volatile oil phase solvent and other auxiliaries into a reaction kettle at normal temperature, and sealing, stirring and mixing;

secondly, the mixture obtained in the first step is passed through a grinder to reduce the particle size of the powder;

thirdly, passing the mixture obtained in the second step through a 350-mesh screen;

and fourthly, sampling the stock solution, testing the surface of the 0.2 micron crack pipeline, effectively displaying the judgment result to be qualified, and packaging the qualified product in a binary aerosol can mode, wherein the propellant is nitrogen.

The invention has the following beneficial effects:

(1) the water leakage detection agent provided by the invention does not contain substances damaging metal and plastic pipelines, and has no severe temperature difference in the using process.

(2) The pipeline building detection agent provided by the invention has high sensitivity, can detect the pipeline water leakage defect with the opening width of 0.2 mu m, and improves the detection reliability.

(3) The water leakage detection agent provided by the invention contains a hydrophilic self-emulsifying agent, is easy to clean, can be cleaned by an organic solvent and can also be cleaned by water (deionized water), and the material cost is saved.

(4) The water leakage detection agent provided by the invention has long shelf life and is not easy to deteriorate or lose efficacy.

Detailed Description

In order that the invention may be more fully understood, preferred embodiments are now described in detail.

Example 1

The invention relates to a pipeline water leakage detection agent and a preparation method thereof, wherein the specific formula table of the detection agent is shown as the following table:

the preparation method comprises the following steps:

(1) selecting raw materials which are chemically pure or more than chemically pure and meet the requirements, weighing the raw materials according to mass percentage for later use.

(2) At normal temperature, the dye, the surfactant, the volatile oil phase solvent and other auxiliary agents are sequentially added into a reaction kettle and stirred for 2 hours in a closed manner.

(3) And (4) passing the stirred mixed suspension through a grinder, and repeating for 5 times for standby.

(4) The mixture obtained above was passed through a 350 mesh screen for use.

(5) Sampling the stock solution, testing the surface of the 0.2 micron crack pipeline, effectively displaying the judgment result to be qualified, and packaging in bulk or aerosol can form.

When the pipeline water leakage detection agent is used, the pipeline water leakage detection agent is applied to the surface of a workpiece, a uniform powder film is formed after the surface is dried, the drying time is within 1 minute in a room with the ambient humidity being lower than 50%, then the powder film is kept still for 5 minutes, if water leaks from a detected area, a blue trace indication is generated on the powder film, and the formation and distribution of defects can be detected visually.

The water leakage detector for the pipeline can detect the defect that the opening width is 0.2 mu m, and can be cleaned by organic solvent and water.

Example 2

The specific formula table of the detection agent is shown as the following table:

the rest is the same as in example 1.

Example 3 specific formulation of the test agents are shown in the following table:

the rest is the same as in example 1.

Claims (6)

1. A pipeline water leakage detection agent comprises 3-5 parts by weight of dye, 90-92 parts by weight of volatile oil phase solvent, 0.3-1 part by weight of other auxiliary agents and 2-6.7 parts by weight of surfactant.

2. The water leakage detecting agent according to claim 1, wherein said dye is water-soluble basic turquoise blue B.

3. The water leakage detection agent for pipes of claim 1, wherein the volatile oil phase solvent is a mixture of n-heptane and isohexane.

4. The water leakage detection agent for pipelines according to claim 1, wherein the other auxiliary agent is hydroxypropyl cellulose.

5. The water leakage detecting agent according to claim 1, wherein said surfactant is sodium diisobutylnaphthalenesulfonate.

6. The preparation method for preparing the water leakage detection agent for the pipeline as claimed in claim 1 is characterized by comprising the following specific steps:

firstly, sequentially adding a dye, a surfactant, a volatile oil phase solvent and other auxiliaries into a reaction kettle at normal temperature, and sealing, stirring and mixing;

secondly, the mixture obtained in the first step is passed through a grinder to reduce the particle size of the powder;

thirdly, passing the mixture obtained in the second step through a 350-mesh screen;

and fourthly, sampling the stock solution, testing the surface of the 0.2 micron crack pipeline, effectively displaying the judgment result to be qualified, and packaging the qualified product in a binary aerosol can mode, wherein the propellant is nitrogen.