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CN-122017149-A - Flaw detection device for manufacturing high-pressure hydrogen pipe fitting

CN122017149ACN 122017149 ACN122017149 ACN 122017149ACN-122017149-A

Abstract

The invention discloses a flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings, and belongs to the field of pipeline detection. The detection device comprises a mounting mechanism, wherein a moving mechanism is arranged on the inner side of the mounting mechanism, a detection mechanism is arranged above the moving mechanism, the detection mechanism comprises a fixed seat, movable seats are arranged on two sides of the fixed seat, T-shaped sliding grooves are formed in the right side of the fixed seat and the right side of the movable seat, and the detection scheme of 'pipe fitting fixing and detection probe circumferential scanning' in the prior art is replaced by adopting the detection scheme of 'pipe fitting rotation', so that the radial runout problem caused by pipe fitting rotation is thoroughly avoided, the detection probe is ensured to stably move along the outer surface of the pipe fitting by being matched with the guiding cooperation of the T-shaped sliding grooves and the T-shaped sliding strips, the distance between the detection probe and the surface of the pipe fitting is kept constant, and the defect detection accuracy is greatly improved.

Inventors

  • JI YANQING
  • MA JING
  • CUI YUHANG
  • LIU YINGLAI
  • WANG LIANG

Assignees

  • 河北恒通管件集团有限公司
  • 河北科技大学

Dates

Publication Date
20260512
Application Date
20260305

Claims (9)

  1. 1. The flaw detection device for manufacturing the high-pressure hydrogen-contacting pipe fitting comprises an installation mechanism (1) and is characterized in that a moving mechanism (2) is arranged on the inner side of the installation mechanism (1); a detection mechanism (3) is arranged above the moving mechanism (2); The detection mechanism (3) comprises a fixed seat (301), wherein movable seats (302) are arranged on two sides of the fixed seat (301), T-shaped sliding grooves (303) are formed in the right side of the fixed seat (301) and the right side of the movable seat (302), T-shaped sliding strips (304) are connected to the inside of the T-shaped sliding grooves (303) in a sliding mode, arc racks (305) are fixedly connected to the outer side walls of the T-shaped sliding strips (304), mounting plates (306) are fixedly connected to the right sides of the T-shaped sliding strips (304), and detection probes (307) are fixedly connected to the upper surfaces of the mounting plates (306); The front and rear parts inside the fixed seat (301) and the front and rear parts inside the movable seat (302) are respectively connected with a shaft post (308) through a rotating shaft, the right end of the shaft post (308) is fixedly connected with a circular gear I (309), the outer side wall of the circular gear I (309) is meshed with the outer side wall of the circular rack (305), the left end of the shaft post (308) is fixedly connected with a driving wheel (310), and the outer side walls of the two driving wheels (310) opposite to each other in front and rear are jointly connected with a driving belt (311) in a transmission manner; the matching surfaces of the T-shaped sliding groove (303) and the T-shaped sliding strip (304) are polished, and the matching clearance is 0.02-0.05mm.
  2. 2. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings according to claim 1, wherein a telescopic connecting rod (312) is fixedly connected between the right and left opposite circular gear I (309) and the driving wheel (310), the telescopic connecting rod (312) is a spline type telescopic connecting rod, and the matching surface of the telescopic end and the fixed end of the spline type telescopic connecting rod is subjected to wear-resistant coating treatment.
  3. 3. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings according to claim 1, wherein an L-shaped bracket I (313) is fixedly connected to the left rear of the movable seat (302) positioned on the left side of the fixed seat (301), a motor (314) is fixedly connected to the inner side of the L-shaped bracket I (313), and the left end of an output shaft of the motor (314) is fixedly connected to the left side of a central shaft of the driving wheel (310) positioned on the left rear of the movable seat (302).
  4. 4. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings according to claim 1, wherein the lower surface of the mounting plate (306) positioned on the right side of the fixing seat (301) is fixedly connected with a poking tooth (315).
  5. 5. The flaw detection device for manufacturing the high-pressure hydrogen-contacting pipe fitting is characterized in that two shaft seats (316) are fixedly connected to the rear surface of the fixing seat (301), a screw rod (317) is rotatably connected between the two shaft seats (316) through a rotating shaft, a screw sleeve (318) is rotatably connected to the outer side wall of the screw rod (317) through a rotating shaft, traction rods (319) are rotatably connected to the two sides of the screw sleeve (318) through rotating shafts, and one end, far away from the screw sleeve (318), of the traction rods (319) is rotatably connected with the rear surface of the movable seat (302) through rotating shafts.
  6. 6. The flaw detection device for manufacturing the high-pressure hydrogen-contacting pipe fitting is characterized in that the moving mechanism (2) comprises a moving plate (201), the center of the upper surface of the moving plate (201) is fixedly connected with the lower surface of the fixed seat (301), a through linkage opening (202) is formed in the upper surface of the moving plate (201) and located on the right side of the fixed seat (301), a circular gear II (203) is rotatably connected to the left side of the inside of the linkage opening (202) through a rotating shaft, a bevel gear I (204) is fixedly connected to the outer side wall of the circular gear II (203) in a meshed manner, a bevel gear II (205) is fixedly connected to the outer side wall of the bevel gear I (204), a cylinder (206) is fixedly connected to the lower surface of the bevel gear II (205), an L-shaped bracket II (207) is rotatably connected to the outer side wall of the fixed seat (301) through the rotating shaft, and a circular gear III (208) is fixedly connected to the top of the circular gear II (207) and the upper surface of the moving plate (208).
  7. 7. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings according to claim 6, wherein transverse grooves (209) are formed in two sides of the upper surface of the moving plate (201), transverse rods (210) are fixedly connected to the inner sides of the transverse grooves (209), sliding blocks (211) are slidably connected to the outer side walls of the transverse rods (210), and the tops of the sliding blocks (211) are fixedly connected with the tops of the movable seats (302).
  8. 8. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings is characterized in that the installation mechanism (1) comprises a U-shaped seat (101), two guide rods (102) are fixedly connected to the inner side of the U-shaped seat (101), two guide blocks (103) are slidably connected to the outer side wall of the guide rods (102), the upper surface of each guide block (103) is fixedly connected with the lower surface of the corresponding movable plate (201), a toothed bar (104) is fixedly connected to the inner lower surface of the U-shaped seat (101), and the front surface of each toothed bar (104) is in meshed connection with the rear of the outer side wall of the corresponding round gear III (208).
  9. 9. The flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings according to claim 8, wherein two sides of the U-shaped seat (101) are fixedly connected with electric push rods (105), opposite ends of output ends of the two electric push rods (105) penetrate through the inner side of the U-shaped seat (101), and clamping discs (106) are fixedly connected with each other.

Description

Flaw detection device for manufacturing high-pressure hydrogen pipe fitting Technical Field The invention relates to the field of pipeline detection, in particular to a flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings. Background The high-pressure hydrogen-contacting pipe fitting is used as a core pressure-bearing member in the fields of petrochemical industry, coal chemical industry, hydrogen energy storage and transportation and the like, and is used in severe environments of high temperature, high pressure and hydrogen medium corrosion for a long time, tiny defects (such as cracks, air holes, inclusions and the like) on the surface of the high-pressure hydrogen-contacting pipe fitting can be rapidly expanded under the action of a hydrogen embrittlement effect and pressure circulation, and serious safety accidents such as leakage, explosion and the like are finally caused, so that the defects are comprehensively detected by high-precision flaw detection in the manufacturing process. With the rapid development of the hydrogen energy industry and the large-scale upgrading of the refining device, the specification of the high-pressure hydrogen-contacting pipe fitting is expanded in a multi-dimensional manner, more stringent requirements are put forward on the precision, stability and suitability of flaw detection, the detection mode that a clamping disc drives the pipe fitting to rotate and a detection probe to horizontally move is adopted in the prior art, radial runout is easy to occur due to high-speed rotation of the pipe fitting, the precision of flaw detection is greatly reduced, the safety risks of loosening and shifting exist in the rotation process of the pipe fitting, a scheme that a motor/electric push rod is adopted to independently drive a detection assembly to axially move is adopted, a plurality of groups of independent driving parts and a cooperative control system are required, control logic is complex, feeding precision errors are easy to occur, detection is easy to scan omission or repeated scanning is caused, and the suitability of a traditional space adjustment structure is poor, and efficient sectional detection of pipe fittings with different lengths is difficult to realize on the premise of ensuring transmission synchronism. The circular tube steel member flaw detection device related to the patent CN109917004B can only realize weld joint position detection and marking, the movement mode and the driving structure of the detection probe cannot adapt to the severe detection requirement of the high-pressure hydrogen-contacting pipe fitting, and the problems of discontinuous detection, poor suitability and the like exist, so that the actual requirements of the hydrogen energy industry and the upgrading of the refining device on the flaw detection of the high-pressure hydrogen-contacting pipe fitting are difficult to be met. Therefore, the invention designs the flaw detection device for manufacturing the high-pressure hydrogen-contacting pipe fitting, and the transmission structure and the movement mode are optimized, so that the balance of transmission efficiency and use economy is realized while the detection precision is ensured and the automation level is improved, and the problems of low detection precision, complex control, poor suitability and the like in the prior art are solved. Disclosure of Invention The invention aims to provide a flaw detection device for manufacturing high-pressure hydrogen-contacting pipe fittings, which solves the problems that in the prior art, pipe fitting rotation detection is easy to jump, independent driving components are complex in cooperative control, transmission efficiency and detection precision are difficult to consider, and by constructing a linkage mechanical transmission mechanism of 'circumferential scanning of a detection probe and automatic axial feeding of a detection assembly', the traditional scheme of 'pipe fitting rotation' or 'multi-motor independent driving' is replaced, so that the detection probe can realize non-jump, high-precision and continuous scanning along the surface of the pipe fitting, the number of independent driving components is reduced, and control logic is simplified. The technical scheme is that the flaw detection device for manufacturing the high-pressure hydrogen-contacting pipe fitting comprises an installation mechanism, wherein a moving mechanism is arranged on the inner side of the installation mechanism; A detection mechanism is arranged above the moving mechanism; The detection mechanism comprises a fixed seat, wherein movable seats are arranged on two sides of the fixed seat, T-shaped sliding grooves are formed in the right side of the fixed seat and the right side of the movable seat, T-shaped sliding strips are connected inside the T-shaped sliding grooves in a sliding mode, arc racks are fixedly connected to the outer side walls of the T-shaped sliding strips, moun