Metallurgy composite pipeline liquid permeation test block and detection process thereof

Abstract

The invention belongs to the technical field of metallurgical composite pipeline liquid permeation test blocks, and particularly relates to a metallurgical composite pipeline liquid permeation test block and a detection process thereof.The detection process comprises the steps that firstly, a liquid spraying moving trolley is close to and outwards moves out, a dust removal fan at the rear end is turned on, the trolley is filled with washing type penetrating fluid, and the penetrating fluid is sprayed to the inner wall of a pipeline through a trolley nozzle; after completion, the trolley returns to the original point, after standing, the liquid spraying moving trolley automatically resets, then the air blowing moving trolley is driven to approach and move outwards, redundant liquid penetrating agents on the surface are removed by spraying water under the pressure of a pressure pump, the removed penetrating agents are collected by a waste water tank, and after completion, the trolley returns to the original point. And by arranging the scraping assembly, the problem that the inner diameter is changed in the process of polishing the welding slag in the pipeline is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical composite pipeline liquid penetration test blocks, in particular to a metallurgical composite pipeline liquid penetration test block and a detection process thereof. Background Art

[0002] The metallurgical composite pipeline liquid penetration test block is an application based on penetration testing technology. This technology uses the principle of capillary action to detect tiny defects on the pipeline surface by applying a penetrant containing fluorescent or colored dyes. The test block is used as a test standard with known defects to monitor the performance of the penetration testing system.

[0003] The existing process of liquid penetrant testing of metallurgical composite pipelines mainly includes the steps of pretreatment, penetration, cleaning, drying, imaging and observation and recording. First, the metallurgical composite pipeline is pretreated, such as degreasing, rust removal and drying, to ensure the cleanliness of the test surface. Then, the penetrant is applied to the pipeline surface, and the penetrant can penetrate into tiny defects. Then, the excess penetrant is washed off and the pipeline surface is dried. After that, the developer is applied, and the penetrant in the defect will be re-adsorbed onto the pipeline surface to form a visible defect display. Finally, the shape, size and position of the defect are observed and recorded under an appropriate light source to evaluate the quality and safety of the pipeline. The entire detection process is easy to operate and has a high defect detection rate. It is an important means of quality inspection of metallurgical composite pipelines.

[0004] However, in the existing metallurgical composite pipeline liquid penetration testing process, during the pretreatment and cleaning process, there is welding slag attached to the inner wall of the pipeline. When grinding and cleaning, the grinding wheel diameter is usually smaller than the inner diameter of the pipeline, resulting in the grinding tool being unable to completely fit the inner wall of the pipeline for uniform grinding. Therefore, during the grinding process, the edges of the welds are often over-grinded, which not only fails to completely remove the welding slag, but may also change the original size of the inner diameter of the pipeline, causing the ground portion of the inner wall of the pipeline to be recessed a certain distance, resulting in a change in the inner diameter, affecting the uniform application and penetration of the penetrant, thereby reducing the accuracy and reliability of the penetration test, and also affecting the fluid transportation efficiency of the pipeline, and may also cause fluid turbulence and eddy currents, increase the energy consumption and wear of the pipeline system, and even pose a threat to the overall structural strength and safety of the pipeline.

[0005] To this end, the present invention provides a metallurgical composite pipeline liquid penetration test block and a detection process thereof. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a metallurgical composite pipeline liquid penetration test block detection process described in the present invention comprises the following steps: Step 1: Pretreatment: Prepare five curved test blocks. Before use, clean the curved test blocks with acetone to remove the residual penetrant detection agent on the test blocks. Place them at the pipe mouth, 1 / 4, and 1 / 2 of the pipe, and then spray solvent water on the inner wall of the pipe for blowing. After cleaning, blow and dry by spraying compressed air; Step 2: Applying and removing the penetrant: The mobile trolley sprays the penetrant onto the inner wall of the pipe. After the spraying is completed, the trolley is left to stand, and then the water spraying trolley is started to spray water onto the inner wall of the pipe to remove excess penetrant from the inner wall of the pipe. Step 3: Apply developer and perform endoscopic inspection: Use a mobile cart carrying developer to approach the pipeline and spray the developer on the inner wall of the pipeline. After spraying, insert the endoscope into the pipeline for inspection.

[0008] Preferably, the application and removal of the penetrant are specifically as follows: first, the liquid spraying mobile trolley approaches and opens outward, the dust removal fan at the rear end is turned on, the trolley is filled with water-washing type penetrant, and the penetrant is sprayed on the inner wall of the pipe through the trolley nozzle to form a dense and uniform penetrant film. After completion, the trolley returns to the origin, and after standing still, the liquid spraying mobile trolley automatically resets, and then the air blowing mobile trolley is driven to approach and open outward, and water is sprayed under the pressure of the pressure pump to remove excess liquid penetrant on the surface. The removed penetrant is collected by the wastewater tank, and after completion, the trolley returns to the origin.

[0009] Preferably, the application of developer and endoscopic inspection are specifically as follows: first, the developer type applied is a wet developer, which is prepared and stored in a developer box in advance, and then the mobile cart is driven to approach and drive to the rear end of the pipeline, move backward and forward, and the developer is evenly applied to the inner wall through the nozzle by pressurizing the pump. After completion, the cart returns to the origin, and after standing still, the cart with the endoscope is driven to approach, the head of the cart is provided with a rotating head and a telescopic rod, the white light and the camera are placed at the front end of the telescopic rod to keep it perpendicular to the inner wall, open it outward and rotate, take an image, and directly display the inner wall of the pipeline on the display screen to facilitate inspection and judgment, and the inspection results are automatically stored on the configured computer.

[0010] Preferably, the pretreatment is specifically as follows: first, a water-spraying mobile trolley is driven to approach the pipeline. After the mobile trolley approaches the pipeline, solvent water is sprayed into the pipeline to remove dust and grease attached to the inner wall of the pipeline. Then, a welding slag detection trolley is driven to perform detection to clean and scrape off the welding slag on the inner wall of the pipeline. Finally, a drying trolley is driven to blow the inner wall of the pipeline to remove residual moisture on the inner wall of the pipeline.

[0011] Preferably, the specific cleaning process of the welding slag trolley is to drive the welding slag detection trolley to move toward the inner wall of the pipe to be tested. When the body of the welding slag detection trolley abuts against the end of the pipe, the telescopic rod is driven to penetrate into the pipe. During the extension process, the detection component at one end of the telescopic rod will perform welding slag point detection on the inner wall of the pipe. When a number of fixed plates arranged on one side of the fixed ring encounter welding slag, the welding slag squeezes the fixed plate, and the fixed plate squeezes the compression spring, so that the slider at one end of the fixed plate moves along the scale groove, and the moving distance is the height of the welding slag. Then the scraping component is driven to rise, and the rising distance is the same as the detected height, so that the scraping component can be in close contact with the inner wall of the pipe to perform the scraping work.

[0012] Preferably, a guide block is fixedly connected to one end of the fixing plate away from the fixing ring, and the guide block is in an inclined state and can guide the welding slag to abut against and press the fixing plate.

[0013] Preferably, the scraping component is specifically configured to start the motor on one side of the fixed ring after detecting the position of the specific welding slag, adjust the angle of the connecting guide rail to align with the position where scraping is required, and then start the connecting guide rail, which is an electric guide rail, so that the connecting block in the connecting groove slides along the connecting groove, driving the scraper at one end of the connecting rod to abut against the inner wall of the pipe, and driving the telescopic rod again to cause the scraper to scrape the welding slag.

[0014] Preferably, the cross section of the scraper is the same as the arc-shaped inner wall of the pipe. When the scraper abuts against the inner wall of the pipe, the scraper is driven, and the blade at the end of the scraper scrapes and cleans the welding slag.

[0015] Preferably, the connecting block can drive the auxiliary plate to move together during the upward movement. The movement of the auxiliary plate drives the piston column to move along the piston tube, squeezing the water in the piston tube and spraying it onto the inner wall of the pipe, thereby cooling the scraper during the scraping process and absorbing the generated welding slag dust.

[0016] Preferably, a metallurgical composite pipe liquid penetration test block is subjected to a penetration test block detection test.

[0017] The beneficial effects of the present invention are as follows: 1. A metallurgical composite pipeline liquid penetration test block and its detection process described in the present invention, by driving the welding slag detection trolley to move toward the inner wall of the pipeline to be tested, when the trolley body is in close contact with the end of the pipeline, its built-in telescopic rod begins to penetrate into the interior of the pipeline, during this extension process, the detection component at one end of the telescopic rod will detect the inner wall of the pipeline and locate the position of the welding slag. At this time, the multiple fixed plates arranged on one side of the fixed ring play a key role. Once encountering welding slag, the welding slag will squeeze the fixed plate, and then through the elastic action of the compression spring, the slider at one end of the fixed plate moves along the scale groove. The distance of this movement just reflects the height of the welding slag, which provides an accurate height for the subsequent scraping work. Next, the welding slag trolley will drive the scraping component to rise to the corresponding position according to the detected welding slag height, ensuring that the scraping component is closely fitted with the inner wall of the pipeline, improving the accuracy of scraping, and effectively avoiding damage to the inner wall of the pipeline caused by excessive scraping, not only realizing the accurate detection and efficient cleaning of welding slag, but also effectively improving the cleanliness and safety of the inner wall of the pipeline, making the subsequent detection more accurate.

[0018] 2. A metallurgical composite pipeline liquid penetration test block and its detection process described in the present invention, when the specific position of the welding slag is detected, the motor on one side of the fixed ring will start, and the angle of the connecting guide rail will be quickly adjusted to ensure that the scraper can accurately align with the position of the welding slag. Subsequently, the electric guide rail is activated, and the connecting block in the connecting groove slides along a preset path, driving the scraper at one end of the connecting rod to slowly contact the inner wall of the pipeline. The cross-section of the scraper is consistent with the curved inner wall of the pipeline, ensuring that the scraper and the inner wall of the pipeline can form a tight fit, thereby improving the scraping efficiency and accuracy. When the scraper is in close contact with the inner wall of the pipeline, the telescopic rod is driven again to push the scraper to move along the inner wall of the pipeline, and the blade at the end of the scraper begins to scrape and clean the welding slag, which not only realizes the precise positioning and efficient cleaning of the welding slag, but also its curved scraper also reduces the potential damage to the inner wall of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the scraping assembly of the present invention; Figure 3 It is a structural schematic diagram of the piston tube of the present invention; Figure 4 is a cross-sectional view of the piston tube of the present invention; Figure 5 It is a structural schematic diagram of the fixing ring of the present invention; Figure 6 It is a structural schematic diagram of the fixing plate of the present invention; Figure 7 The present invention Figure 6 Enlarged view of point A in .

[0021] In the figure: 1. body; 2. telescopic rod; 3. Fixed ring; 31. Fixed groove; 32. Fixed plate; 33. Guide block; 34. Scale groove; 35. Slider; 36. Telescopic column; 37. Compression spring; 4. Motor; 41. Fixed shaft; 42. Connecting guide rail; 43. Connecting groove; 44. Connecting block; 45. Connecting rod; 46. Scraper; 47. Auxiliary plate; 48. Piston column; 49. Storage box; 410. Top plate; 411. Piston tube; 412. Auxiliary tube; 413. Limiting plate; 414. Spray hole. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0023] like Figures 1 to 7 As shown, a metallurgical composite pipeline liquid penetration test block detection process described in an embodiment of the present invention includes the following steps: Step 1: Pretreatment: Prepare five curved test blocks. Before use, clean the curved test blocks with acetone to remove the residual penetrant detection agent on the test blocks. Place them at the pipe mouth, 1 / 4, and 1 / 2 of the pipe, and then spray solvent water on the inner wall of the pipe for blowing. After cleaning, blow and dry by spraying compressed air; Step 2: Applying and removing the penetrant: The mobile trolley sprays the penetrant onto the inner wall of the pipe. After the spraying is completed, the trolley is left to stand, and then the water spraying trolley is started to spray water onto the inner wall of the pipe to remove excess penetrant from the inner wall of the pipe. Step 3: Apply developer and perform endoscopic inspection: Move a mobile vehicle carrying developer close to the pipeline and spray the developer on the inner wall of the pipeline. After spraying, insert the endoscope into the pipeline for inspection and determination. In this embodiment, the application and removal of the penetrant liquid are specifically as follows: first, the liquid spraying mobile trolley approaches and opens outward, the dust removal fan at the rear end is turned on, the trolley is filled with a water-washing type penetrant liquid, and the penetrant liquid is sprayed on the inner wall of the pipeline through the trolley nozzle to form a dense and uniform penetrant liquid film. After the completion, the trolley returns to the origin, and after standing still, the liquid spraying mobile trolley automatically resets, and then the air blowing mobile trolley is driven to approach and open outward, and water is sprayed under the pressure of the pressure pump to remove excess liquid penetrant on the surface, and the removed penetrant is collected by the waste water tank. After the completion, the trolley returns to the origin; The application of developer and endoscopic inspection in this embodiment are specifically as follows: first, the developer type applied is a wet developer, which is pre-stored in a developer box after being prepared, and then the mobile cart is driven to approach and drive to the rear end of the pipeline, move backward and forward, and the developer is evenly applied to the inner wall through the nozzle by pressurizing the pump. After completion, the cart returns to the origin, and after standing still, the cart with the endoscope is driven to approach, the head of the cart is equipped with a rotating head and a telescopic rod 2, the white light and the camera are placed at the front end of the telescopic rod 2 to keep it perpendicular to the inner wall, open it outward and rotate, take pictures, and directly display the inner wall of the pipeline on the display screen to facilitate inspection and judgment, and the inspection results are automatically stored in the configured computer.

[0024] like Figure 1 As shown, the pretreatment of this embodiment is specifically as follows: first, the water spraying mobile trolley is driven to approach the pipeline. After the mobile trolley approaches the pipeline, solvent water is sprayed into the pipeline to remove dust and grease attached to the inner wall of the pipeline. Then, the welding slag detection trolley is driven to perform detection to clean and scrape off the welding slag on the inner wall of the pipeline. Finally, the drying trolley is driven to blow the inner wall of the pipeline to remove residual moisture on the inner wall of the pipeline.

[0025] Specifically, first, use a mobile cart to approach the pipeline and spray solvent water to effectively remove dust and grease attached to the inner wall of the pipeline; then, the welding slag detection cart performs precise detection and thoroughly cleans and scrapes the welding slag to ensure that the inner wall of the pipeline is smooth and flawless; finally, the drying cart blows the pipeline to remove residual moisture and keep the inner wall of the pipeline dry. It can comprehensively and efficiently clean the inner wall of the pipeline and improve the accuracy of detection.

[0026] like Figures 2 to 4 As shown, the specific cleaning process of the welding slag trolley in this embodiment is to drive the welding slag detection trolley to move toward the inner wall of the pipe to be tested. When the body 1 of the welding slag detection trolley is in contact with the end of the pipe, the telescopic rod 2 is driven to penetrate into the pipe. During the insertion process, the detection component at one end of the telescopic rod 2 will perform welding slag point detection on the inner wall of the pipe. When a plurality of fixed plates 32 arranged on one side of the fixed ring 3 encounter welding slag, the welding slag squeezes the fixed plate 32, and the fixed plate 32 squeezes the compression spring 37, so that the slider 35 at one end of the fixed plate 32 moves along the scale groove 34, and the moving distance is the height of the welding slag. Then the scraping component is driven to rise, and the rising distance is the same as the detected height, so that the scraping component can be in close contact with the inner wall of the pipe to perform the scraping work.

[0027] Specifically, by driving the welding slag detection trolley to move toward the inner wall of the pipeline to be tested, when the trolley body 1 is in close contact with the end of the pipeline, its built-in telescopic rod 2 begins to penetrate into the pipeline. During this extension process, the detection component at one end of the telescopic rod 2 will detect the inner wall of the pipeline and locate the position of the welding slag. At this time, the multiple fixed plates 32 arranged on one side of the fixing ring 3 play a key role. Once encountering welding slag, the welding slag will squeeze the fixed plate 32, and then through the elastic action of the compression spring 37, the slider 35 at one end of the fixed plate 32 moves along the scale groove 34. The distance of this movement just reflects the height of the welding slag, which provides an accurate height for the subsequent scraping work. Next, the welding slag trolley will drive the scraping component to rise to the corresponding position according to the detected welding slag height, ensuring that the scraping component is closely fitted with the inner wall of the pipeline, improving the accuracy of scraping, and effectively avoiding damage to the inner wall of the pipeline caused by excessive scraping. Not only does it realize the accurate detection and efficient cleaning of welding slag, but it also effectively improves the cleanliness and safety of the inner wall of the pipeline, making the subsequent detection more accurate.

[0028] like Figure 6 As shown, in this embodiment, a guide block 33 is fixedly connected to one end of the fixing plate 32 away from the fixing ring 3 . The guide block 33 is in an inclined state and can guide the welding slag to abut against and press the fixing plate 32 . Embodiment 2

[0029] like Figures 1 to 7 As shown, compared with Example 1, another implementation of the present invention is: the scraping component is specifically, when the position of the specific welding slag is detected, the motor 4 on one side of the fixed ring 3 is started, the angle of the connecting guide rail 42 is adjusted, and the position where scraping is required is aligned, and then the connecting guide rail 42 is started. The connecting guide rail 42 is an electric guide rail, so that the connecting block 44 in the connecting groove 43 slides along the connecting groove 43, driving the scraper 46 at one end of the connecting rod 45 to abut against the inner wall of the pipe, and driving the telescopic rod 2 again, so that the scraper 46 scrapes the welding slag. The cross-section of the scraper 46 is the same as the arc-shaped inner wall of the pipe. When it abuts against the inner wall of the pipe, the scraper 46 is driven, and the blade at the end of the scraper 46 scrapes and cleans the welding slag.

[0030] Specifically, when the specific position of the welding slag is detected, the motor 4 on one side of the fixing ring 3 will start, and the angle of the connecting guide rail 42 will be adjusted quickly to ensure that the scraper 46 can accurately align with the position of the welding slag. Subsequently, the electric guide rail is activated, and the connecting block 44 in the connecting groove 43 slides along a preset path, driving the scraper 46 at one end of the connecting rod 45 to slowly contact the inner wall of the pipe. The cross-section of the scraper 46 coincides with the arc-shaped inner wall of the pipe, ensuring that the scraper 46 and the inner wall of the pipe can form a tight fit, thereby improving the scraping efficiency and accuracy. When the scraper 46 is in close contact with the inner wall of the pipe, the telescopic rod 2 is driven again to push the scraper 46 to move along the inner wall of the pipe, and the blade at the end of the scraper 46 begins to scrape and clean the welding slag, which not only achieves accurate positioning and efficient cleaning of the welding slag, but also its arc-shaped scraper 46 also reduces potential damage to the inner wall of the pipe.

[0031] like Figure 4 As shown, in the process of upward movement of the connecting block 44 of this embodiment, the auxiliary plate 47 can be driven to move together. The movement of the auxiliary plate 47 drives the piston column 48 to move along the piston tube 411, squeezing the water in the piston tube 411 and spraying it to the inner wall of the pipe, thereby cooling the scraper 46 during the scraping process and absorbing the generated welding slag dust.

[0032] Specifically, when the scraping assembly is working, the connecting block 44 moves upward and drives the auxiliary plate 47 to move synchronously, which can drive the piston column 48 to slide in the piston tube 411, thereby squeezing the moisture in the tube to form water mist that is sprayed onto the inner wall of the pipe, effectively reducing the high temperature generated by the scraper 46 when scraping welding slag, and preventing thermal damage to the inner wall of the pipe. At the same time, the sprayed water mist can also absorb and take away the welding slag dust generated during the scraping process, ensuring the cleanliness of the inner wall of the pipe, which not only improves the scraping efficiency, but also effectively protects the inner wall of the pipe, and enhances the safety and reliability of the pipeline pretreatment work.

[0033] Working principle: first, use a mobile trolley to approach the pipeline and spray solvent water to effectively remove dust and grease attached to the inner wall of the pipeline; then, the welding slag detection trolley performs precise detection by driving the welding slag detection trolley to move toward the inner wall of the pipeline to be tested. When the trolley body 1 is in close contact with the end of the pipeline, its built-in telescopic rod 2 begins to penetrate into the interior of the pipeline. During this insertion process, the detection component at one end of the telescopic rod 2 will detect the inner wall of the pipeline and locate the position of the welding slag. At this time, the multiple fixing plates 32 set on one side of the fixing ring 3 play a key role. Once encountering welding slag, the welding slag will squeeze the fixing plate 32, and then through the compression spring The elastic action of 37 causes the slider 35 at one end of the fixed plate 32 to move along the scale groove 34. The distance of this movement just reflects the height of the welding slag, providing an accurate height for the subsequent scraping work. Next, the welding slag trolley will drive the scraping assembly to rise to the corresponding position according to the detected welding slag height, ensuring that the scraping assembly fits tightly with the inner wall of the pipeline, improving the accuracy of scraping, and effectively avoiding damage to the inner wall of the pipeline caused by excessive scraping. It not only realizes the accurate detection and efficient cleaning of welding slag, but also effectively improves the cleanliness and safety of the inner wall of the pipeline, making the subsequent detection more accurate; When the specific position of the welding slag is detected, the motor 4 on one side of the fixing ring 3 will start, and the angle of the connecting guide rail 42 will be adjusted quickly to ensure that the scraper 46 can accurately align with the position of the welding slag. Subsequently, the electric guide rail is activated, and the connecting block 44 in the connecting groove 43 slides along the preset path, driving the scraper 46 at one end of the connecting rod 45 to slowly contact the inner wall of the pipe. The cross section of the scraper 46 coincides with the arc-shaped inner wall of the pipe, ensuring that the scraper 46 and the inner wall of the pipe can form a tight fit, thereby improving the scraping efficiency and accuracy. When the scraper 46 is in close contact with the inner wall of the pipe, the telescopic rod 2 is driven again to push the scraper 46 to move along the inner wall of the pipe, and the blade at the end of the scraper 46 begins to scrape and clean the welding slag, which not only realizes the precise positioning and efficient cleaning of the welding slag, but also reduces the potential damage to the inner wall of the pipe. In addition, when the scraping assembly is working, the connecting block 44 moves upward and drives the auxiliary plate 47 to move synchronously, which can drive the piston rod 48 to slide in the piston tube 411, thereby squeezing the water in the tube to form water mist that is sprayed onto the inner wall of the pipeline, effectively reducing the high temperature generated by the scraper 46 when scraping the welding slag, and preventing thermal damage to the inner wall of the pipeline. At the same time, the sprayed water mist can also absorb and take away the welding slag dust generated during the scraping process, ensuring the cleanliness of the inner wall of the pipeline, which not only improves the scraping efficiency, but also effectively protects the inner wall of the pipeline, and enhances the safety and reliability of the pipeline pretreatment work. After the welding slag is thoroughly cleaned and scraped off to ensure that the inner wall of the pipeline is smooth and flawless, the drying trolley will blow the pipeline to remove residual moisture and keep the inner wall of the pipeline dry. It can comprehensively and efficiently clean the inner wall of the pipeline and improve the accuracy of detection.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A metallurgical composite pipeline liquid penetration test block detection process, characterized in that: The specific steps include: Step 1: Pretreatment: Prepare five curved test blocks. Before use, clean the curved test blocks with acetone to remove the residual penetrant detection agent on the test blocks. Place them at the pipe mouth, 1 / 4, and 1 / 2 of the pipe, and then spray solvent water on the inner wall of the pipe for blowing. After cleaning, blow and dry by spraying compressed air; Step 2: Applying and removing the penetrant: The mobile trolley sprays the penetrant onto the inner wall of the pipe. After the spraying is completed, the trolley is left to stand, and then the water spraying trolley is started to spray water onto the inner wall of the pipe to remove excess penetrant from the inner wall of the pipe. Step 3: Apply developer and perform endoscopic inspection: Use a mobile cart carrying developer to approach the pipeline and spray the developer on the inner wall of the pipeline. After spraying, insert the endoscope into the pipeline for inspection.

2. A metallurgical composite pipeline liquid penetration test block detection process according to claim 1, characterized in that: The specific steps of applying and removing the penetrant are as follows: first, the liquid spraying mobile trolley approaches and moves outward, the dust removal fan at the rear end is turned on, the trolley is filled with water-washing penetrant, and the penetrant is sprayed on the inner wall of the pipe through the trolley nozzle to form a dense and uniform penetrant film. After completion, the trolley returns to the origin, and after standing still, the liquid spraying mobile trolley automatically resets, and then the air blowing mobile trolley is driven to approach and move outward, and water is sprayed under the pressure of the pressure pump to remove excess liquid penetrant on the surface. The removed penetrant is collected by the wastewater tank, and after completion, the trolley returns to the origin.

3. A metallurgical composite pipeline liquid penetration test block detection process according to claim 1, characterized in that: The application of developer and endoscopic inspection are specifically as follows: first, the developer type applied is a wet developer, which is stored in a developer box after being prepared, and then the mobile trolley is driven to approach and drive to the rear end of the pipeline, and then move backwards and forwards. The developer is pressurized by a pump to evenly apply the developer to the inner wall through the nozzle. After completion, the trolley returns to the origin, and after standing still, the trolley with the endoscope is driven to approach. The head of the trolley is provided with a rotating head and a telescopic rod (2). The white light and the camera are kept perpendicular to the inner wall at the front end of the telescopic rod (2), and are opened outward and rotated to take pictures. The inner wall of the pipeline is directly displayed on the display screen for easy inspection and judgment. The inspection results are automatically stored in the configured computer.

4. A metallurgical composite pipeline liquid penetration test block detection process according to claim 1, characterized in that: The pretreatment is as follows: first, drive the water spraying mobile trolley to approach the pipeline. After the mobile trolley approaches the pipeline, spray solvent water into the pipeline to remove dust and grease attached to the inner wall of the pipeline. Then drive the welding slag detection trolley to detect and clean and scrape off the welding slag on the inner wall of the pipeline. Finally, drive the drying trolley to blow the inner wall of the pipeline to remove residual moisture on the inner wall of the pipeline.

5. A metallurgical composite pipeline liquid penetration test block detection process according to claim 4, characterized in that: The specific cleaning process of the welding slag trolley is as follows: the welding slag detection trolley is driven to move toward the inner wall of the pipeline to be tested. When the body (1) of the welding slag detection trolley abuts against the end of the pipeline, the telescopic rod (2) is driven to go deeper into the pipeline. During the deepening process, the detection component at one end of the telescopic rod (2) will perform welding slag point detection on the inner wall of the pipeline. When a plurality of fixed plates (32) arranged on one side of the fixed ring (3) encounter welding slag, the welding slag squeezes the fixed plate (32), and the fixed plate (32) squeezes the compression spring (37), so that the slider (35) at one end of the fixed plate (32) moves along the scale groove (34), and the moving distance is the height of the welding slag. Then, the scraping component is driven to rise, and the rising distance is the same as the detected height, so that the scraping component can be closely attached to the inner wall of the pipeline to perform the scraping work.

6. A metallurgical composite pipeline liquid penetration test block detection process according to claim 5, characterized in that: A guide block (33) is fixedly connected to one end of the fixing plate (32) away from the fixing ring (3); the guide block (33) is in an inclined state and can guide the welding slag to abut against and press the fixing plate (32).

7. A metallurgical composite pipeline liquid penetration test block detection process according to claim 5, characterized in that: Specifically, the scraping component starts the motor (4) on one side of the fixing ring (3) after detecting the specific position of the welding slag, adjusts the angle of the connecting guide rail (42) to align with the position where scraping is required, and then starts the connecting guide rail (42). The connecting guide rail (42) is an electric guide rail, so that the connecting block (44) in the connecting groove (43) slides along the connecting groove (43), drives the scraper (46) at one end of the connecting rod (45) to abut against the inner wall of the pipe, and drives the telescopic rod (2) again, so that the scraper (46) scrapes the welding slag.

8. A metallurgical composite pipeline liquid penetration test block detection process according to claim 7, characterized in that: The cross section of the scraper (46) is the same as the arc-shaped inner wall of the pipe. When the scraper (46) contacts the inner wall of the pipe, the scraper (46) is driven, and the blade at the end of the scraper (46) scrapes and cleans the welding slag.

9. A metallurgical composite pipeline liquid penetration test block detection process according to claim 7, characterized in that: The connecting block (44) can drive the auxiliary plate (47) to move together with the connecting block (44) during the upward movement. The movement of the auxiliary plate (47) drives the piston column (48) to move along the piston tube (411), squeezes the water in the piston tube (411), sprays it onto the inner wall of the pipe, cools the scraper (46) during the scraping process, and absorbs the generated welding slag and dust.

10. A metallurgical composite pipeline liquid penetration test block, characterized in that: A metallurgical composite pipeline liquid penetration test block detection process as described in any one of claims 1 to 9 is used to perform a penetration test block detection test.

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