Apparatus for handling a measuring instrument for the inside of a nuclear reactor

• US 4,946,642 A
• Filed: 10/20/1988
• Issued: 08/07/1990
• Est. Priority Date: 01/20/1988
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Yoshinaga, Isao, Edashima, Toshikazu
• Primary Examiner(s): Wasil, Daniel D.
• Application Number:
  US07/260,320
• Time in Patent Office: 656 Days
• Field of Search: 376/260, 376/245, 376/254, 376/255, 376/227, 254/317, 254/312, 254/294, 212/142, 187/11, 187/27, 60/905
• US Class Current: 376/260
• CPC Class Codes: G21C 17/003 Remote inspection of vessels, e.g. pressure vessels
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

A handling apparatus for a measuring instrument for the inside of a nuclear reactor has a pair of take-up drums each having a wire rope wrapped around it. A measuring instrument is secured to one end of each of the wire ropes. Each take-up drum rotates together with a corresponding drive wheel to raise or lower the measuring instrument by means of the cable. The take-up drums and the drive wheels are connected to a single motor by a gearbox equipped with a clutch which enables power to be selectively transmitted to either of the take-up drums and the corresponding drive wheel.

Claims

1. An apparatus for handling a measuring instrument for the inside of a nuclear reactor comprising:

a pair of take-up drums;

a pair of wire ropes, each of which has one end wrapped around one of said take-up drums and the other end connected to a measuring instrument for the inside of a nuclear reactor;

a pair of drive wheels which are disposed between the measuring instruments and said take-up drums, each of said drive wheels corresponding to one of said take-up drums, and being drivingly engaged with one of said wire ropes; and

a motor; and

selector means coupled between the motor, the drive wheels, and the take-up drums for selectively rotating either of said take-up drums one at a time together with the corresponding drive wheel, said selector means including a gear box which has two output shafts and which is connected to the motor so as to be driven thereby, clutch means for selectively rotating one of the output shafts of the gear box, and means for transmitting the rotation of each of the output shafts of the gear box to one of the take-up drums and the corresponding drive wheel.