A device for magnetostatic field spray permeation non-destructive testing
By using static magnetic field spraying technology to spray penetrant and developer onto the surface of the specimen, the problems of high cost and low accuracy of existing automated penetrant testing devices are solved, achieving efficient and environmentally friendly testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST IND GRP CO LTD
- Filing Date
- 2025-04-10
- Publication Date
- 2026-07-03
AI Technical Summary
Existing automated permeation testing devices are costly, have low accuracy, and poor adaptability.
The static magnetic field spraying technology utilizes a spray gun, negative magnetic poles, and positive magnetic poles to generate a static magnetic field, which makes the penetrant and developer negatively charged. The penetrant is sprayed onto the surface of the specimen and penetrates into the defects through capillary action. Combined with a high-pressure air pump and a high-pressure generator, efficient spraying is achieved.
It improves detection sensitivity, reduces the amount of materials used in testing, reduces environmental pollution, and saves on equipment investment and testing costs.
Smart Images
Figure CN224456617U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of non-destructive testing technology, and in particular relates to a device for static magnetic field spray penetration non-destructive testing. Background Technology
[0002] Penetrant testing, also known as nondestructive testing, involves penetrating a specimen with a penetrant solution. Under capillary action, the penetrant penetrates into surface defects over time. Excess penetrant is then removed from the workpiece surface, and after drying, a developer is sprayed onto the surface. Again, under capillary action, the developer attracts the penetrant from the defects. Finally, under illumination by a specific light source, the penetrant traces at the defects are revealed, thus detecting surface defects. While current automated penetrant testing technologies have improved testing speed to some extent, most systems require a series of tanks, including cleaning tanks, penetrant tanks, drying tanks, and developer tanks. Furthermore, these systems require wastewater treatment equipment, resulting in significant overhead in factory space, increased equipment investment, and higher inspection costs. Furthermore, issues such as low testing accuracy and poor adaptability persist.
[0003] Therefore, there is an urgent need to develop a completely new penetration testing device to overcome the problems existing in the current technology. Utility Model Content
[0004] The technical problem this invention aims to solve is that existing automated penetration testing methods suffer from high costs, low accuracy, and poor adaptability.
[0005] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:
[0006] A device for non-destructive testing of electrostatic magnetic field spraying penetration is characterized by comprising a spray gun 1, a high-pressure air pump 2, a penetrant tank 3, a developer tank 4, a high-pressure generator 5, a specimen 6, a negative magnetic pole 7, and a positive magnetic pole 8.
[0007] One end of the spray gun 1 is connected to the high-pressure generator 5, and the other end is connected to the high-pressure air pump 2. The high-pressure air pump 2 is connected to the permeate tank 3 and the developer tank 4 respectively. Negative magnetic poles 7 and positive magnetic poles 8 are respectively provided on the side of the spray gun 1 and the specimen 6.
[0008] The spray gun 1 includes a penetrant spray gun and a developer spray gun. Different types of spray gun 1 are used to complete the penetrant test according to the test procedure.
[0009] The spray gun is equipped with a connection interface for a high-pressure air pump 2 and a high-pressure generator 5.
[0010] The handle of the spray gun 1 is connected to a relay on the electrostatic generator to generate static electricity on the spray gun head 1.
[0011] The handle of the spray gun 1 is equipped with a trigger safety lock. If the spray gun 1 is involved in a collision, the trigger will stop working, preventing the penetrant and developer in the spray gun 1 from being sprayed out.
[0012] The distance between the negative magnetic pole 7 and the positive magnetic pole 8 is 300-1000mm.
[0013] When the high-pressure generator 5 is working, it applies negative high pressure to the spray gun 1. The high-pressure air pump 2 carries the permeate from the permeate tank 3 into the spray gun 1, causing the spray gun 1 to spray out a negatively charged permeate. A static magnetic field is generated between the negative magnetic pole 7 and the positive magnetic pole 8. Under the action of the static magnetic field, the negatively charged permeate is sprayed onto the surface of the specimen 6. The permeate seeps into the defects on the surface of the specimen 6 through capillary action. After waiting for 5-10 minutes, the excess permeate on the surface of the specimen 6 is removed with a special cleaning agent, and the surface of the specimen 6 is dried with a blower. The developer in the developer tank 4 enters the spray gun 1 through the high-pressure air pump 2. Under the action of the static magnetic field, the high-pressure generator 5 causes the spray gun 1 to spray out a negatively charged developer that is evenly sprayed onto the surface of the specimen 6. The permeate in the defects is re-permeated back onto the surface of the specimen 6 under capillary action, forming a defect image.
[0014] This invention has the following advantages: under the action of a static magnetic field, it increases the adsorption capacity of the permeate and the developer, improves the detection sensitivity, saves detection materials, and reduces environmental pollution. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the device for static magnetic field spray penetration non-destructive testing according to this utility model;
[0016] In the diagram: 1. Spray gun; 2. High-pressure air pump; 3. Permeate tank; 4. Developer tank; 5. High-pressure generator; 6. Specimen; 7. Negative magnetic pole; 8. Positive magnetic pole. Detailed Implementation
[0017] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model is provided below with reference to the accompanying drawings.
[0018] like Figure 1 As shown, the static magnetic field spray penetrant nondestructive testing device of this embodiment includes a spray gun 1, a high-pressure air pump 2, a penetrant tank 3, a developer tank 4, a high-pressure generator 5, a specimen 6, a negative magnetic pole 7, and a positive magnetic pole 8. One end of the spray gun 1 is connected to the high-pressure generator 5, and the other end of the spray gun 1 is connected to the high-pressure air pump 2. The high-pressure air pump 2 is connected to the penetrant tank 3 and the developer tank 4 respectively. The negative magnetic pole 7 and the positive magnetic pole 8 are provided outside the spray gun 1 and the specimen 6, mainly used to generate a static magnetic field. Under the action of the static magnetic field, the negatively charged penetrant and developer are sprayed onto the surface 6 of the specimen.
[0019] Specifically, the first step is pretreatment, which removes impurities from the surface of specimen 6, such as oil, paint, burrs, scale, and metal shavings. The second step is penetrant spraying. When the high-pressure generator 5 is working, it applies negative high pressure to the spray gun 1. The high-pressure air pump 2 carries the penetrant from the penetrant tank 3 into the spray gun 1, causing the penetrant sprayed from the spray gun 1 to be negatively charged. A static magnetic field is generated between the negative magnetic pole 7 and the positive magnetic pole 8. Under the action of the static magnetic field, the negatively charged penetrant is sprayed onto the surface of specimen 6, and the penetrant penetrates into the surface defects of specimen 6 through capillary action. The third step is cleaning and drying. Excess penetrant on the surface of specimen 6 is removed with a special cleaning agent, and then dried with a blower. The surface of the dry specimen 6 is then sprayed. In the fourth step, the developer in the developer tank 4 is introduced into the spray gun 1 through the high-pressure air pump 2. Under the action of the static magnetic field, the high-pressure generator 5 causes the spray gun 1 to spray the negatively charged developer evenly onto the surface of the specimen 6. The penetrating liquid in the defect is re-permeated back onto the surface of the specimen 6 under capillary action, forming a defect image. In the fifth step, by observing and analyzing the image, the location, size, and nature of the defect are marked with a marker pen at the defect location. The quantitative, qualitative, and locational analysis of the defect is performed to draw conclusions and complete the defect assessment. In the sixth step, post-processing is performed to clean the penetrating liquid and developer from the surface of the specimen 6.
[0020] Preferably, the spray gun 1 has two types: one is a penetrant spray gun and the other is a developer spray gun. According to the inspection procedure, different types of spray guns 1 are replaced to complete the penetrant test. The spray gun is equipped with a connection interface for a high-pressure air pump 2 and a high-pressure generator 5.
[0021] Preferably, the handle of the spray gun 1 is equipped with a low-pressure switch, which is connected to a relay on the electrostatic generator. When the switch is turned on, the relay works and generates static electricity on the spray gun head 1. The handle of the spray gun 1 is equipped with a trigger safety lock. If the spray gun 1 is involved in a collision, the trigger will stop working, so that the penetrant and developer in the spray gun 1 will not be sprayed out.
[0022] Preferably, the high-pressure air pump 2 is used to pressurize the permeate in the permeate tank 3 and the developer in the developer tank 4, so that the permeate and developer can smoothly enter the spray gun 1.
[0023] Preferably, the high-voltage generator 5 is a negative high-voltage generator; the high-voltage generator 5 is equipped with an automatic overcurrent protection device, which protects the high-voltage generator 5 by automatically cutting off power if an overcurrent occurs; the function of the high-voltage generator 5 is to provide negative high voltage to the spray gun 1, so that the penetrant and developer sprayed by the spray gun 1 are negatively charged.
[0024] Preferably, the negative magnetic pole 7 and the positive magnetic pole 8 are located outside the spray gun 1 and the specimen 6, and their main function is to generate a static magnetic field to spray the negatively charged penetrant and developer onto the surface 6 of the specimen; the distance between the negative magnetic pole 7 and the positive magnetic pole 8 is 300-1000mm.
[0025] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the protection scope of the present invention.
Claims
1. A device for magnetostatic field spray permeation non-destructive testing, characterized in that, Includes a spray gun (1), a high-pressure air pump (2), a permeate tank (3), a developer tank (4), a high-pressure generator (5), a specimen (6), a negative magnetic pole (7), and a positive magnetic pole (8); One end of the spray gun (1) is connected to the high-pressure generator (5), and the other end is connected to the high-pressure air pump (2). The high-pressure air pump (2) is connected to the permeate tank (3) and the developer tank (4) respectively. Negative magnetic poles (7) and positive magnetic poles (8) are provided on the sides of the spray gun (1) and the specimen (6) respectively.
2. The apparatus for magnetostatic field spray penetrant nondestructive testing of claim 1, wherein, The spray gun (1) includes a penetrant spray gun and a developer spray gun. Different types of spray guns (1) are used to complete the penetrant test according to the test steps.
3. The apparatus for magnetostatic field spray penetrant nondestructive testing of claim 2, wherein, The spray gun is equipped with a high-pressure air pump (2) and a high-pressure generator (5) connection interface.
4. The apparatus of claim 1, wherein, The handle of the spray gun (1) is connected to a relay on the electrostatic generator to generate static electricity on the spray gun (1) head.
5. The apparatus of claim 1, wherein, The handle of the spray gun (1) is equipped with a trigger safety lock. If the spray gun (1) is involved in a collision, the trigger will stop working, so that the penetrant and developer in the spray gun (1) will not be sprayed out.
6. The apparatus of claim 1, wherein, The distance between the negative magnetic pole (7) and the positive magnetic pole (8) is 300-1000mm.
7. The apparatus of claim 1, wherein, When the high-pressure generator (5) is working, it applies negative high pressure to the spray gun (1). The high-pressure air pump (2) brings the permeate from the permeate tank (3) into the spray gun (1), so that the spray gun (1) sprays out the permeate with a negative charge. A static magnetic field is generated between the negative magnetic pole (7) and the positive magnetic pole (8). Under the action of the static magnetic field, the negatively charged permeate is sprayed onto the surface of the specimen (6). The permeate seeps into the defects on the surface of the specimen (6) through capillary action. After waiting for 5-10 minutes, the excess permeate on the surface of the specimen (6) is removed with a special cleaning agent, and the surface of the specimen (6) is dried with a blower. The developer in the developer tank (4) enters the spray gun (1) through the high-pressure air pump (2). Under the action of the static magnetic field, the high-pressure generator (5) makes the spray gun (1) spray out the negatively charged developer evenly onto the surface of the specimen (6). The permeate in the defect is re-permeated onto the surface of the specimen (6) under capillary action, forming a defect image.