Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
  • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
  • B66D1/28—Other constructional details
  • B66D1/30—Rope, cable, or chain drums or barrels

Definitions

• This invention relates to cable winding apparatus.
• the apparatus is suitable for receiving and dispensing substantially any type of wire cable, electric lines, rope, cored and the like (hereinafter referred to collectively as "cable").
• Cable winding apparatus of various kinds is known and in common use. Such apparatus is used in the oil field industry, both offshore and land based, and also for general marine equipment. Other applications include crane, winch and vehicle-mounted systems.
• the apparatus according to the present invention is suitable for use in all of these fields. Particular attention has been directed to achieving some sort of control over the manner in which cables are wound upon drums or spools, particularly when the cable is frequently extended and under tension. Apparatus of this kind is described in GB-A 737352 and GB-A 776007.
• An object of the present invention is to avoid the disadvantages referred to above. This is achieved by attaching the innermost end of the cable to a tail line which is of smaller diameter than the cable and has a relatively low load bearing capacity.
• the main hoist rope or cable may thus be allowed to pass freely through the rigging system of the machine, followed by the attached secondary rope or tail line, which can ultimately be allowed to break free from the drum anchorage once sufficient cable and tail line have run through clear of the machine.
• the tail line controls the passage of the cable by maintaining a tension in the cable as it passes through the reeving system, and the tail line has a substantially lower breaking strength compared with the load bearing capacity of the machine upon which it is mounted. Thus, a snagged vessel or falling load attached to the free end of the cable cannot in turn pull the hoisting machine from its mounting.
• FIG 4 is an end view of the drum of Figure 1 .
• the drawings show a drum 1 having an arrangement of circumferential primary grooves 2 designed for controlled cable spooling.
• This arrangement of the primary grooves is known in itself and is described for example in GB-A 776007.
• the primary grooves are arranged in two diametrically opposed sets each parallel to the ends of the drum, but one set being displaced axially with respect to the other set by one half the width of the grooves.
• Each set of grooves is of a length less than half the circumference of the drum, so there is provided a pair of axially extending, diametrically opposed cable control zones 3 on the periphery of the drum.
• Such control zones may be plain, or as actually shown in the drawings may be provided with a set of helical grooves which communicate between the adjacent ends of the two main sets of grooves.
• end fillers 4 are provided a t both ends of the drum to guide the cable between the two sets of primary grooves, and hence obtain controlled spooling.
• the cable is shifted axially by a half pitch.
• the secondary grooves 5 there is formed in the base of the primary grooves the secondary grooves 5. These are of smaller diameter than the primary grooves, and correspond to the diameter of the tail line, which is correspondingly of smaller diameter than the cable.
• the grooving of the secondary grooves is of the opposite hand to that of the primary grooves. This is achieved by machining the secondary grooves so that they crossover the primary grooves in the region 3 of the two sets of helical grooves. Two sets of crossover points therefore coincide on diametrically opposite sides of the drum.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)
• Manufacturing Of Electric Cables (AREA)
• Insulated Conductors (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Manufacture Of Tobacco Products (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)
• Peptides Or Proteins (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10564975

Family Applications (1)

Country Status (8)

Cited By (1)

Citations (8)

• 1984
  • 1984-08-06 GB GB08419964A patent/GB2162811B/en not_active Expired
• 1985
  • 1985-08-06 DE DE8585903862T patent/DE3563842D1/de not_active Expired
  • 1985-08-06 EP EP85903862A patent/EP0190248B1/en not_active Expired
  • 1985-08-06 WO PCT/GB1985/000350 patent/WO1986001189A1/en active IP Right Grant
  • 1985-08-06 AT AT85903862T patent/ATE35805T1/de not_active IP Right Cessation
• 1986
  • 1986-03-18 FI FI861116A patent/FI79822C/fi not_active IP Right Cessation
  • 1986-04-04 DK DK155786A patent/DK153022C/da not_active IP Right Cessation
  • 1986-04-04 NO NO86861327A patent/NO163482C/no unknown

Patent Citations (8)

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