Material for detecting leakage of hydrostatic test as well as preparation method and detection method of material

Abstract

The invention provides a material for detecting water pressure test leakage and a preparation method and a detection method thereof, and particularly relates to the technical field of pressure-bearing equipment sealing performance detection. The material for detecting the leakage of the hydrostatic test comprises the following raw materials in parts by weight: 20-50 parts of anhydrous cupric sulfate powder; and 50-80 parts of calcium carbonate powder. According to the material, the characteristic that the anhydrous cupric sulfate powder rapidly chemically reacts when meeting water to generate blue copper sulfate pentahydrate is utilized, and leakage points on the surface of equipment can be sensitively detected during a hydrostatic test.

Description

Technical Field

[0001] The invention relates to the technical field of sealing performance detection of pressure-bearing equipment, and in particular to a material for detecting leakage during a water pressure test and a preparation method and a detection method thereof. Background Art

[0002] The hydraulic pressure test is a test method used to detect the tolerance of pressure-bearing equipment or structures under water pressure. It is widely used in boilers, pressure vessels, piping systems, marine engineering equipment, etc. It tests the tightness and strength of equipment or structures by applying a test pressure that exceeds the normal working pressure of the equipment or structure.

[0003] At present, when using water pressure test to detect the strength and sealing performance of pressure-bearing equipment, the leakage of water on the surface of the equipment is directly observed to determine whether the equipment has leakage. However, since water is a colorless and transparent liquid, the contrast between the leakage point area and the adjacent area on the surface of the equipment is small in appearance color, so there is a possibility of missing the leakage point on the surface of the equipment by direct observation. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention provides a material for detecting water pressure test leakage and a preparation method and a detection method thereof, so as to improve the problem that the leakage point of the water pressure test cannot be accurately determined.

[0005] To achieve the above-mentioned object and other related objects, the first aspect of the present invention provides a material for detecting water pressure test leakage, the material comprising the following raw materials in parts by weight: 20 to 50 parts of anhydrous copper sulfate powder; 50 to 80 parts of calcium carbonate powder.

[0006] In one embodiment of the present invention, the finished particle size of the material is 80-1000 mesh.

[0007] In one embodiment of the present invention, the particle size of the anhydrous copper sulfate powder and the calcium carbonate powder is 80-1000 mesh.

[0008] In one embodiment of the present invention, the material includes the following raw materials in parts by weight: 30 to 40 parts of anhydrous copper sulfate powder; 60 to 70 parts of calcium carbonate powder.

[0009] A second aspect of the present invention provides a method for preparing a material for detecting water pressure test leakage, the method comprising the following steps:

[0010] Anhydrous copper sulfate powder and calcium carbonate powder are weighed in a weight ratio of (20-50): (50-80); the weighed anhydrous copper sulfate powder and calcium carbonate powder are mixed, fully ground and sieved to obtain a finished material.

[0011] In one embodiment of the present invention, the particle size of the finished material is 80-1000 mesh.

[0012] In one embodiment of the present invention, the particle size of the finished material is 200-800 mesh.

[0013] In one embodiment of the present invention, after the finished material is obtained, the method further includes: performing moisture-proof and sealed packaging on the finished material according to usage requirements.

[0014] The present invention also provides a method for detecting leakage points in a water pressure test, which comprises the following steps: spraying the above-mentioned material for detecting leakage in a water pressure test onto the surface of the pressure-bearing equipment to form a white background; observing whether the white background on the surface of the pressure-bearing equipment changes color during the water pressure test, and judging the leakage point based on the color change.

[0015] In one embodiment of the present invention, when there is a leak at the pressure-bearing equipment and water drops seep out, the anhydrous copper sulfate powder in the material absorbs the seeped water to produce a chemical reaction and change color, and the color-changing area is the leak.

[0016] The material for detecting water pressure test leakage provided by the present invention comprises anhydrous copper sulfate powder and calcium carbonate powder. The anhydrous copper sulfate and calcium carbonate powder are mixed in a certain proportion and are white in a dry state. After encountering water, the anhydrous copper sulfate rapidly undergoes a chemical reaction to generate blue copper sulfate pentahydrate, so that the white material turns blue, thereby determining the leakage point. Calcium carbonate does not change when encountering water and is non-toxic and harmless. Adding a certain proportion of calcium carbonate can adjust the concentration of anhydrous copper sulfate in the material, reduce harm to the environment, and can also reduce product costs without affecting the detection sensitivity of the monitoring material of the present invention.

[0017] The synthesis method of the material for detecting water pressure test leakage of the present invention is simple and easy to operate, and is suitable for large-scale promotion.

[0018] Compared with the direct observation method in the prior art for finding leakage points, the use of the material of the present invention for detecting leakage points in a water pressure test significantly improves the sensitivity of detection and reduces the probability of missing leakage points. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0020] Figure 1The present invention is a flow chart of a method for preparing a material for detecting leakage during a water pressure test;

[0021] Figure 2 The present invention is a flow chart of the method for detecting leakage points in a water pressure test. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present invention can also be used to implement the present invention.

[0024] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0025] The present invention provides a material for detecting leakage in a water pressure test, a preparation method thereof, and a detection method thereof. The material utilizes the characteristic that white anhydrous copper sulfate rapidly undergoes a chemical reaction when in contact with water to generate blue copper sulfate pentahydrate, and can sensitively detect leakage points on the surface of equipment during a water pressure test. By adding white calcium carbonate powder that does not undergo a chemical reaction when in contact with water to anhydrous copper sulfate powder, the concentration of the anhydrous copper sulfate powder in the powder of the present invention can be adjusted, thereby reducing harmful effects on the environment and reducing product costs, while not affecting the detection sensitivity of the powder of the present invention.

[0026] The first aspect of the present invention provides a material for detecting leakage in a water pressure test, the material comprising raw materials anhydrous copper sulfate powder and calcium carbonate powder. The anhydrous copper sulfate powder and the calcium carbonate powder are white under dry conditions, and after contacting water, the anhydrous copper sulfate will quickly react with water to generate blue copper sulfate pentahydrate, while the calcium carbonate powder remains unchanged. The characteristic of anhydrous copper sulfate changing color when contacting water can be used to sensitively detect leakage points during a water pressure test, and the introduction of calcium carbonate powder will reduce the use of anhydrous copper sulfate, thereby reducing harm to the environment and reducing production costs.

[0027] Since calcium carbonate powder remains white after contacting water, if the content of calcium carbonate powder in the test material is high, the color change of anhydrous copper sulfate powder after contacting water is superimposed on the white color of calcium carbonate powder and is not obvious, and it is not easy to be detected, thereby affecting the sensitivity of the detection. Therefore, the ratio of anhydrous copper sulfate powder and calcium carbonate powder in the material has a greater impact on the sensitivity of hydraulic pressure test leakage detection. In the present application, the weight parts of anhydrous copper sulfate powder in the material used to detect hydraulic pressure test leakage is 20 to 50 parts, for example, the weight parts of anhydrous copper sulfate powder can be 20 parts, 30 parts, 40 parts or 50 parts, and so on. Further, the weight parts of anhydrous copper sulfate are 30 to 40 parts, and further, the weight parts of anhydrous copper sulfate are 35 parts. The weight parts of calcium carbonate powder are 50 to 80 parts, for example, the weight parts of calcium carbonate powder can be 50 parts, 60 parts, 70 parts or 80 parts, and so on. Furthermore, the weight portion of the calcium carbonate powder is 60 to 70 parts, and further, the weight portion of the calcium carbonate powder is 65 parts.

[0028] In one embodiment, the finished particle size of the material for detecting water pressure test leakage is controlled at 80-1000 mesh, that is, the finished material is sieved with a sieve of 80-1000 mesh after preparation. Further, the finished particle size of the material for detecting water pressure test leakage is controlled at 200-800 mesh, for example, the finished particle size can be 200 mesh, 400 mesh, 600 mesh or 800 mesh, etc.

[0029] In another embodiment, in the material for detecting water pressure test leakage, the particle size of anhydrous copper sulfate powder is 80 to 1000 mesh, for example, the particle size of anhydrous copper sulfate powder can be 80 mesh, 100 mesh, 300 mesh, 500 mesh, 700 mesh or 1000 mesh, etc.; the particle size of calcium carbonate powder is 80 to 1000 mesh, for example, the particle size of calcium carbonate powder can be 80 mesh, 100 mesh, 300 mesh, 500 mesh, 700 mesh or 1000 mesh.

[0030] See also Figure 1 The second aspect of the present invention provides a method for preparing a material for detecting leakage in a water pressure test, comprising the following steps:

[0031] S11, weighing anhydrous copper sulfate powder and calcium carbonate powder in a weight ratio of (20-50): (50-80);

[0032] S12, mixing the weighed anhydrous copper sulfate powder and calcium carbonate powder, grinding them thoroughly and then sieving them to obtain a finished material.

[0033] In step S11, the anhydrous copper sulfate powder and the calcium carbonate powder can be weighed in a weight ratio of 20:80, 30:70, 40:60 or 50:50, etc. In this step, the particle sizes of the anhydrous copper sulfate powder and the calcium carbonate powder are not limited and can be adjusted in step S12.

[0034] Step S12: The anhydrous copper sulfate and calcium carbonate powders weighed in step S1 are fully ground and mixed uniformly. The purpose of grinding is to mix the anhydrous copper sulfate and calcium carbonate powders and make their particle size reach the target particle size. The grinding method can adopt the conventional grinding method in the art. As an example, the weighed anhydrous copper sulfate powder and calcium carbonate powder are added to a ball mill and fully ground and mixed uniformly. After that, they are sieved with a sieve of 80 to 1000 meshes so that the finished product particle size is controlled to be 80 to 1000 meshes.

[0035] In other embodiments, the anhydrous copper sulfate powder and calcium carbonate powder weighed in step S11 may be ground to 80-1000 meshes respectively, and then the ground anhydrous copper sulfate powder and calcium carbonate powder may be mixed evenly.

[0036] Since anhydrous copper sulfate immediately undergoes a chemical reaction to become blue copper sulfate pentahydrate when it comes into contact with water, in order to prevent the material from getting damp and discolored during storage, after step S12, step S13 is further included to seal the finished material, specifically including: using a quantitative packaging machine to perform moisture-proof and sealed packaging on the finished material obtained in step S12 according to the use requirements. The packaging quantity of each package can be limited according to the actual use requirements, and is not limited here.

[0037] See also Figure 2 The third aspect of the present invention provides a method for detecting a leakage point during a water pressure test, the method comprising the following steps:

[0038] S21, spraying a material for detecting water pressure test leakage on the surface of the pressure-bearing equipment to be tested to form a white background;

[0039] S22. Observe whether the white background on the surface of the pressure equipment changes color during the water pressure test, and determine the leakage point based on the color change.

[0040] The material used to detect leakage in the water pressure test in step S21 is the material of the present invention mentioned above or the material prepared by the above preparation method. The material is sprayed in a manner such as using a powder spraying device to spray the above material on the surface of the pressure-bearing device to be tested. The material is delivered to the spray gun from the powder supply system by compressed air, and a high voltage generated by a high-voltage electrostatic generator is added to the front end of the spray gun to charge the powder and adsorb it on the surface of the workpiece. The spraying thickness of the material in this step is not specifically limited and can be selected according to actual conditions. It should be noted that the spraying thickness of the material can at least cover the color of the pressure-bearing device to be tested.

[0041] Step S22 performs a water pressure test according to a normal water pressure test process, and observes whether the white background sprayed on the pressure-bearing equipment changes color during the test. If a color change occurs, the leakage point is determined based on the color change; if no color change occurs, there is no leakage point.

[0042] Specifically, since the detection material used in this detection method contains anhydrous copper sulfate, if there is a leak on the pressure-bearing equipment to be detected, water droplets will seep out from the leak and quickly react with the anhydrous copper sulfate in the surface spray material: CuSO4+5H2O=CuSO4·5H2O to turn into blue copper sulfate pentahydrate, so that the white background in the leak area turns blue, and the appearance color of the leak area and its adjacent areas shows a clear contrast, and the leak can be determined based on the color change contrast. If there is no leak on the pressure-bearing equipment to be tested, no water droplets will seep out during the water pressure test, and there will be no color change.

[0043] The technical scheme of the present invention is described in detail below through specific examples. Unless otherwise specified, the raw materials and reagents used in the following examples are all commercially available products, or can be prepared by conventional methods in the art, and the instruments used in the examples are all commercially available.

[0044] The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1

[0046] This embodiment provides a material for detecting water pressure test leakage, which includes the following raw materials in parts by weight: 50 parts of anhydrous copper sulfate powder and 50 parts of calcium carbonate powder.

[0047] The preparation method of the material used to detect water pressure test leakage in this embodiment is as follows:

[0048] S11. Weigh anhydrous copper sulfate powder and calcium carbonate powder in a weight ratio of 50:50 respectively;

[0049] S12, adding the weighed anhydrous copper sulfate powder and calcium carbonate powder into a ball mill, grinding and mixing them thoroughly, and then sieving them, the mesh number of the sieve is 80 mesh;

[0050] S13, packaging the obtained powder in a moisture-proof sealed manner using a quantitative packaging machine according to usage requirements.

[0051] Example 2

[0052] This embodiment provides a material for detecting water pressure test leakage, which includes the following raw materials in parts by weight: 20 parts of anhydrous copper sulfate powder and 80 parts of calcium carbonate powder.

[0053] The preparation method of the material used to detect water pressure test leakage in this embodiment is as follows:

[0054] S11. Weigh anhydrous copper sulfate powder and calcium carbonate powder in a weight ratio of 20:80 respectively;

[0055] S12, adding the weighed anhydrous copper sulfate powder and calcium carbonate powder into a ball mill, grinding and mixing them fully, and then sieving, the mesh number of the sieve is 200 mesh;

[0056] S13, packaging the obtained powder in a moisture-proof and sealed manner using a quantitative packaging machine according to usage requirements.

[0057] Example 3

[0058] This embodiment provides a material for detecting water pressure test leakage, which includes the following raw materials in parts by weight: 30 parts of anhydrous copper sulfate powder and 70 parts of calcium carbonate powder.

[0059] The preparation method of the material used to detect water pressure test leakage in this embodiment is as follows:

[0060] S11. Weigh anhydrous copper sulfate powder and calcium carbonate powder respectively in a weight ratio of 30:70;

[0061] S12, adding the weighed anhydrous copper sulfate powder and calcium carbonate powder into a ball mill, grinding and mixing them fully, and then sieving, the mesh number of the sieve is 500 mesh;

[0062] S13, packaging the obtained powder in a moisture-proof sealed manner using a quantitative packaging machine according to usage requirements.

[0063] Example 4

[0064] This embodiment provides a material for detecting water pressure test leakage, which includes the following raw materials in parts by weight: 40 parts of anhydrous copper sulfate powder and 60 parts of calcium carbonate powder.

[0065] The preparation method of the material used to detect water pressure test leakage in this embodiment is as follows:

[0066] S11. Weigh anhydrous copper sulfate powder and calcium carbonate powder respectively in a weight ratio of 40:60;

[0067] S12, adding the weighed anhydrous copper sulfate powder and calcium carbonate powder into a ball mill, grinding and mixing them fully, and then sieving, the mesh number of the sieve is 1000 mesh;

[0068] S13, packaging the obtained powder in a moisture-proof and sealed manner using a quantitative packaging machine according to usage requirements.

[0069] Example 5

[0070] This embodiment provides a material for detecting water pressure test leakage, which includes the following raw materials in parts by weight: 35 parts of anhydrous copper sulfate powder and 65 parts of calcium carbonate powder.

[0071] The preparation method of the material used to detect water pressure test leakage in this embodiment is as follows:

[0072] S11. Weigh anhydrous copper sulfate powder and calcium carbonate powder respectively in a weight ratio of 35:65;

[0073] S12, adding the weighed anhydrous copper sulfate powder and calcium carbonate powder into a ball mill, grinding and mixing them fully, and then sieving, the mesh number of the sieve is 800 mesh;

[0074] S13, packaging the obtained powder in a moisture-proof and sealed manner using a quantitative packaging machine according to usage requirements.

[0075] Comparative Example 1

[0076] The difference between this comparative example and Example 1 is that the material does not contain anhydrous copper sulfate powder.

[0077] Comparative Example 2

[0078] The difference between this comparative example and Example 1 is that the material does not contain calcium carbonate powder.

[0079] Comparative Example 3

[0080] The difference between this comparative example and Example 1 is that the weight ratio of anhydrous copper sulfate powder and calcium carbonate powder in the material is 10:90.

[0081] The materials prepared in Examples 1 to 5 and Comparative Examples 1 to 3 were used to detect the leakage points of the water pressure test. During the detection, the materials prepared in each Example and Comparative Example were sprayed on the pressure-bearing equipment using a powder spraying device, the spraying thickness was kept consistent, and the color change during the water pressure test was observed. In order to facilitate the comparison of the color changes of each Example and Comparative Example, the pressure-bearing equipment to be detected can use the same equipment, or equipment with the same leakage point.

[0082] The test results show that the materials of Examples 1 to 5 all have color changes (from white to blue) at the leakage point of the pressure-bearing equipment, and as the content of anhydrous copper sulfate in the material increases, the color becomes darker (the color change becomes more obvious). In Comparative Example 1, since the material does not contain anhydrous copper sulfate, no color change occurs, so the location of the leakage point cannot be detected; in Comparative Example 2, since the material does not contain calcium carbonate powder and is entirely composed of anhydrous copper sulfate, the color change is the deepest; in Comparative Example 3, the content of anhydrous copper sulfate in the material is relatively low, and although there is a color change at the leakage point of the pressure-bearing equipment, the change is not obvious, and there is only a slight discoloration.

[0083] In summary, the material for detecting water pressure test leakage provided by the present invention utilizes the characteristic that white anhydrous copper sulfate reacts rapidly with water to generate blue copper sulfate pentahydrate, and can sensitively detect leakage points on the surface of the equipment during the water pressure test. By adding white calcium carbonate powder that does not react chemically with water to anhydrous copper sulfate powder, the concentration of anhydrous copper sulfate powder in the powder of the present invention can be adjusted, the harmful effects on the environment can be reduced, and the product cost can be reduced without affecting the detection sensitivity of the powder of the present invention. Therefore, the present invention effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A material for detecting leakage in a water pressure test, characterized in that: The material includes the following raw materials in parts by weight: 20-50 parts of anhydrous copper sulfate powder; 50-80 parts of calcium carbonate powder.

2. The material for detecting water pressure test leakage according to claim 1, characterized in that: The finished particle size of the material is 80 to 1000 meshes.

3. The material for detecting water pressure test leakage according to claim 1, characterized in that: The particle sizes of the anhydrous copper sulfate powder and the calcium carbonate powder are 80 to 1000 meshes.

4. The material for detecting water pressure test leakage according to claim 1, characterized in that: The materials include the following raw materials in parts by weight: 30-40 parts of anhydrous copper sulfate powder; 60-70 parts of calcium carbonate powder.

5. A method for preparing a material for detecting water pressure test leakage, characterized in that: The following steps are involved: Weigh anhydrous copper sulfate powder and calcium carbonate powder in a weight ratio of (20-50):(50-80); The weighed anhydrous copper sulfate powder and the calcium carbonate powder are mixed, fully ground and sieved. The finished material is obtained.

6. The method for preparing a material for detecting water pressure test leakage according to claim 5, characterized in that: The particle size of the finished product material is 80 to 1000 meshes.

7. The method for preparing a material for detecting water pressure test leakage according to claim 6, characterized in that: The particle size of the finished product material is 200-800 meshes.

8. The method for preparing a material for detecting water pressure test leakage according to claim 5, characterized in that: After the finished material is obtained, the method further includes: performing moisture-proof and sealed packaging on the finished material according to usage requirements.

9. A method for detecting a leakage point in a water pressure test, characterized in that: The following steps are involved: Spraying the material for detecting water pressure test leakage according to claim 1 on the surface of the pressure-bearing equipment to form a white background; During the test, observe whether the white background on the surface of the pressure-bearing equipment changes color, and determine the leakage point based on the color change.

10. The method for detecting a leakage point in a water pressure test according to claim 9, characterized in that: When there is a leak at the pressure-bearing equipment and water drops seep out, the anhydrous copper sulfate powder in the material absorbs the seeped water to produce a chemical reaction and change color, and the color-changing area is the leak.

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