X-Ray photographic inspecting device

• US 4,490,833 A
• Filed: 11/14/1983
• Issued: 12/25/1984
• Est. Priority Date: 09/12/1980
• Status: Expired due to Fees

• Current Assignee: Hoxan Corp.
• Original Assignee: Hoxan Corp.
• Inventors: Kon, Shizuo, Shinohara, Shizuo, Kaku, Tsukasa, Inomata, Masashi
• Primary Examiner(s): Church, Craig E.
• Application Number:
  US06/550,726
• Time in Patent Office: 407 Days
• Field of Search: 378/58, 378/59, 378/197
• US Class Current: 378/58
• CPC Class Codes: G01N 23/04 and forming images of the material
• CPC Class Codes: G01N 23/083 the radiation being X-rays
• CPC Class Codes: G01N 23/18 Investigating the presence of flaws defects or foreign matter

Abstract

An X-ray photographic inspecting device for inspecting a welded part such as, for example, a vertical welded part on a wall to be inspected like the wall of a metal tank, which has a body movable at the upper edge of the wall to be inspected and supported by a supporting leg on the wall to be inspected, an X-ray generator elevationally and movably hung at a guide rail vertically provided at the body, and a radiological transmitter mounted on a support provided at the X-ray generator. This entire device can be operated by a single worker or operator by an operational panel on a gondola, which drives the X-ray generator and the gondola, fixing the body to the wall with magnets or releasing the fixture of the body, urging the transmitter onto the wall to be inspected, bonding the film on the opposite side of the wall to be inspected, and carrying out the X-ray photographing of the welded part on the wall to be inspected.

Claims

1. A weld flaw-detection apparatus using X-ray photography, where the X-ray apparatus is to be positioned on one side of a high wall, and operated by a technician who will enable the apparatus to send an X-ray beam through the wall to a film positioned on the other side of the wall, said apparatus comprising in combination:

(a) a movable housing (1) with an upper and lower end, a positioning section at said upper end for positioning at the upper edge of a wall having welds therealong which are to be examined for flaws, including support means for supporting said housing (1);

(b) a vertical guide rail (4) so disposed as to extend down from said housing (1) on one side of said wall, movable and adjustable limit switches (9) for positioning along said guide rail (4) at predetermined positions;

(c) a transmitter support (13) including drive means, elevationally and movably hung on said guide rail (4), an X-ray generator (6) generating penetrating X-rays, and an X-ray transmitter (11), coupled to said generator, on said support (13), said X-ray transmitter being disposed for beaming penetrating X-rays through the wall at said perdetermined positions where welds are located so as to determine if there are flaws in said welds;

(d) a lead-shielded movable gondola (24) for holding an operator including cable means (25) connected to the housing (1), said gondola being arranged to be disposed on the side of the wall opposite said transmitter (11), a door on said gondola openable towards the wall to place a film material thereon to receive any transmitted X-rays from said X-ray transmitter; and

,

(e) a supporting leg (5) of U-shape configuration at the lower end of said housing, said supporting leg having leg frame means (5a) with inner ends which are to be placed opposite said wall, a pair of magnets (15) at said inner ends disposed to engage the wall to be inspected, a guide rail (4) across said leg frame means (5a), a first pivot (20) on said guide rail (4), a cylinder (21) having a pivoted end, pivoted to said first pivot (20) and an output piston shaft (21a), telescoped into said cylinder (21), said output shaft having an output end, a second pivot (19) on said leg frame means (5a), an arm (18) with one end pivoted to said second pivot (19) and the other end being connected to said output end, a wheel (17), journaled on said arm (18) between said leg frame means (5a) so that when said output shaft (21a) extends out of the cylinder (21) it pushes said wheel against the wall to be examined, separating the magnets (15) from contact with the wall.