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CN-122016648-A - Nondestructive testing device for defects of inner coating of pipeline

CN122016648ACN 122016648 ACN122016648 ACN 122016648ACN-122016648-A

Abstract

The invention discloses a nondestructive testing device for defects of a pipeline inner coating, and relates to the technical field of fluorescence detection. The invention comprises a light guide transparent pipe provided with an atomizing nozzle), a disposable blocking head (with a plastic film), a pipe joint (integrated ultraviolet generating component) and a crawling type information receiving part (comprising three 120-degree wide-angle cameras, a squeeze roller, a driving motor and a centering support arm). During detection, the water washing type fluorescent penetrant is pumped into the inner coating to be sprayed uniformly, residual liquid is washed by high-pressure gas rupture of membranes, then the defect inner fluorescent agent is washed and retained by clear water, then the inner coating is inserted into the receiving part to climb along the pipe, ultraviolet light uniformly illuminates the whole inner wall through the light guide tube, a 360-degree fluorescent image is captured by the camera in real time, and the defect is judged by the contour brightness. The device has compact structure, simple and convenient operation, comprehensive and accurate detection and is suitable for nondestructive detection of inner coatings of various industrial pipelines.

Inventors

  • ZHAO NENG
  • XIANG FAWEN
  • SHI GUANGCHEN

Assignees

  • 水联(江西)管道装备有限公司

Dates

Publication Date
20260512
Application Date
20260304

Claims (8)

  1. 1. The nondestructive testing device for the defects of the coating in the pipeline is characterized by comprising an information receiving part arranged on a supporting component, wherein the information receiving part can creep on the surface of a light guide transparent pipe (201), a plurality of atomizing nozzles (202) are uniformly arranged on the circumferential surface of the light guide transparent pipe (201), all the atomizing nozzles (202) are communicated with the inner space of the light guide transparent pipe (201), one end of the light guide transparent pipe (201) is blocked and fixed with a blocking head (203) in a manner of being convenient to detach, and a plastic film (204) is arranged at the axle center position of the blocking head (203); The other end of the light guide transparent tube (201) is fixed with a tube joint (205) in a convenient-to-detach mode, the tube joint (205) is used for being connected with an exhaust port of an air pump or an exhaust port of a liquid pump, an ultraviolet generating component (206) is embedded in the tube joint (205), and the end face of the ultraviolet generating component (206) is attached to and aligned with the end face of the light guide transparent tube (201); The information receiving part comprises a cylindrical carrier (103) capable of axially moving on the surface of the light guide transparent tube (201), three wide-angle cameras (102) are arranged on the circumferential surface of the cylindrical carrier (103), and the three wide-angle cameras (102) are distributed on the cylindrical carrier (103) at 120 degrees.
  2. 2. The nondestructive testing device for defects of inner coating layers of pipelines according to claim 1, wherein the information receiving part further comprises a square shell (101) for fixing a cylindrical carrier (103), two squeeze roller supporting plates (107) are fixedly arranged in the square shell (101), two support slide block sliding grooves (114) are symmetrically formed in each squeeze roller supporting plate (107), support slide blocks (115) are slidably arranged in each support slide block sliding groove (114), two squeeze rollers (108) with parallel axes and in rolling fit with the surfaces of the light guide transparent tubes (201) are further arranged between opposite surfaces of the two squeeze roller supporting plates (107), and the two squeeze rollers (108) are respectively rotatably arranged on the corresponding two support slide blocks (115) through two driving rotating shafts (112).
  3. 3. The nondestructive inspection device for defects of inner coating of pipeline according to claim 2, wherein elastic pull rope fixing frames (110) are fixed at the middle parts of the opposite surfaces of the two extrusion roller supporting plates (107), collar bearings (113) are rotatably sleeved at two ends of each driving rotating shaft (112), and all the collar bearings (113) are elastically connected with the elastic pull rope fixing frames (110) through elastic pull ropes (111).
  4. 4. The nondestructive testing device for defects of inner coating of pipeline according to claim 3, wherein the square shell (101) is further provided with two driving motor sliding grooves (105), driving motors (106) are slidably arranged in the two driving motor sliding grooves (105), and output shafts of the two driving motors (106) are respectively and fixedly connected with the two driving rotating shafts (112) in a coaxial mode.
  5. 5. The nondestructive testing device for defects of inner coating of pipeline according to claim 4, wherein the square shell (101) is further provided with two shifting sheet plates (104) in a sliding mode, the two shifting sheet plates (104) are arranged on one surface of the square shell (101) provided with the driving motor sliding groove (105), and the two shifting sheet plates (104) are respectively fixed with the outer shells of the two driving motors (106).
  6. 6. A nondestructive inspection apparatus for defects of an inner coating of a pipe according to claim 5, wherein the support member comprises an outer protective frame (301) fixed to the square housing (101), the square housing (101) is fixed to an inner side surface of the outer protective frame (301), and at least three centering support arms are movably mounted on a circumferential surface of the outer protective frame (301).
  7. 7. A nondestructive inspection apparatus for defects of an inner coating of a pipe according to claim 6, wherein each of the centering support arms comprises two symmetrically arranged swing arms (303), one end of each swing arm (303) is movably connected with the outer protective frame (301) through a hinge (302), and the other end of each swing arm (303) is rotatably provided with a support roller (307).
  8. 8. The nondestructive inspection apparatus for pipeline inner coating defects according to claim 6, wherein each centering support arm further comprises two spring telescopic rods (305) fixed on the outer protective frame (301), wherein the actuating rods of the two spring telescopic rods (305) are fixed with a synchronous beam rod (304), pins are fixed at two ends of the synchronous beam rod (304), a sliding guide rail (306) is arranged on each swinging support arm (303), and the pins are arranged in the sliding guide rail (306) in a sliding manner.

Description

Nondestructive testing device for defects of inner coating of pipeline Technical Field The invention relates to the technical field of fluorescence detection, in particular to a nondestructive testing device for defects of a coating in a pipeline. Background In the prior art, nondestructive detection of coating defects in a pipeline is mainly carried out by means of manual endoscope and manual spraying of fluorescent penetrant. When the device is operated, the end part of the pipeline is required to be opened, a worker stretches into the spray gun or the brush from one end to coat the penetrating agent on the inner wall, the spraying is difficult to be uniform due to long length and narrow space of the pipeline, local spraying leakage or accumulation is easy to occur, and then the process of manually wiping or simply washing is very complicated. When in detection, the endoscope probe can only be partially irradiated by the hand-held ultraviolet lamp, the endoscope probe needs to be repeatedly pushed and rotated, 360-degree continuous coverage is difficult to realize, and the equipment is easy to be eccentric and blocked in a pipeline and cannot stably advance. Disclosure of Invention In order to overcome the defects of the prior art, the technical scheme is that the nondestructive testing device for the defects of the coating in the pipeline comprises an information receiving part arranged on a supporting component, the information receiving part can creep on the surface of a light guide transparent pipe, a plurality of atomizing nozzles are uniformly arranged on the circumferential surface of the light guide transparent pipe, all the atomizing nozzles are communicated with the inner space of the light guide transparent pipe, a blocking head is blocked and fixed at one end of the light guide transparent pipe in a convenient-to-detach mode, a plastic film is arranged at the axial center position of the blocking head, a pipe joint is fixed at the other end of the light guide transparent pipe in a convenient-to-detach mode, the pipe joint is used for being connected with an exhaust port of an air pump or a liquid pump exhaust port, an ultraviolet generating component is embedded in the pipe joint, and the end face of the ultraviolet generating component is in fitting alignment with the end face of the light guide transparent pipe. The ultraviolet generating assembly is internally provided with a plurality of ultraviolet lamp beads, the ultraviolet lamp beads gather ultraviolet rays through lamp cups to radiate the ultraviolet rays to the end face of the light guide transparent tube, the information receiving part comprises a cylindrical carrier capable of axially moving on the surface of the light guide transparent tube, three wide-angle cameras are arranged on the circumferential surface of the cylindrical carrier, and the three wide-angle cameras are distributed on the cylindrical carrier at 120 degrees. Preferably, the information receiving part further comprises a square shell for fixing the cylindrical carrier, two squeeze roll supporting plates are fixedly arranged in the square shell, two support slide block sliding grooves are symmetrically formed in each squeeze roll supporting plate, support slide blocks are slidably arranged in each support slide block sliding groove, two squeeze rolls with parallel axes and in rolling fit with the surface of the light guide transparent tube are further arranged between opposite surfaces of the two squeeze roll supporting plates, and the two squeeze rolls are respectively and rotatably arranged on the two corresponding support slide blocks through two driving rotating shafts. The squeeze roller is fixedly matched with the driving rotating shaft, two ends of the driving rotating shaft are rotationally matched with the two supporting sliding blocks, and the supporting sliding blocks can only slide in the sliding grooves of the supporting sliding blocks without rotational freedom degree. Preferably, the middle parts of the opposite sides of the two extrusion roller support plates are respectively fixed with an elastic pull rope fixing frame, the two ends of each driving rotating shaft are respectively and rotatably sleeved with a sleeve ring bearing, and all the sleeve ring bearings are elastically connected with the elastic pull rope fixing frames through elastic pull ropes. All be fixed with the protecting cover in every squeeze roll backup pad, the protecting cover is used for detaining lantern ring bearing, elasticity stay cord fixed frame and elasticity stay cord in squeeze roll backup pad, has still offered the fluting that is used for letting drive pivot linear motion on the protecting cover, prevents to cause the motion to drive the pivot and shelter from. Preferably, two driving motor sliding grooves are further formed in the square shell, driving motors are slidably mounted in the two driving motor sliding grooves, and output shafts of the two driving motors