Abstract:
A hoist system includes a winch drum and an air motor coupled to the winch drum. The hoist system further includes a brake coupled to the winch drum and operable to stop rotation of the winch drum and an over-speed sensing device configured to sense a speed of the winch drum. The over-speed sensing device includes a pneumatic switch operable to disconnect an air supply from the air motor and engage the brake to stop rotation of the winch drum and a centrifugal clutch coupled to the winch drum and configured to rotate at a rotational speed proportional to the speed of the winch drum. The centrifugal clutch operates the pneumatic switch when the rotational speed of the centrifugal clutch reaches or exceeds a threshold rotational speed.
Abstract:
An overwinding prevention device for winch, comprising a winch drum wound up and down drivingly by instructions from an operation lever, a stop switch operated when a suspended article raised and lowered by the taking-up and paying-out of a hoist rope wound on the winch drum is wound up to a specified stop position, and a stopping device which stops the driving of the winch drum through the operation of the stop switch; further comprising a speed detection device which detects the winding up speed of the suspended article, a deceleration device which decelerates the driving of the winch drum when the suspended article arrives at a specified deceleration start position, and a deceleration control device which calculates the deceleration of the winch drum according to the winding up speed of the suspended article detected by the speed detection device and controls the driving of the deceleration device by the deceleration instructions according to the deceleration.
Abstract:
A pulling tool is provided with a rotatable drum having a cable wound thereon. A motor is drivingly connected to the rotatable drum and the rotatable drum and motor are disposed within a unique housing structure. The rotatable drum is driven by a planetary gear system that is disposed within the rotatable drum to provide a compact assembly. A belt and pulley system is provided for delivering torque from the motor to the planetary gear system. The rotatable drum is provided with a two-piece stepped construction that allows the planetary gear system to be assembled within the drum and allows for the initial wraps of a cable around the smaller diameter portion of the stepped drum.
Abstract:
A task input is received at a well service rig. The maximum allowable speed is determined for the task. Current block speed inputs are received. The throttle position for the engine controlling the block is evaluated to determine if the block is to be sped up or slowed down. When the throttle position indicates the operator is attempting to speed up the block, the current block speed is compared to the maximum allowable speed and the engine is only allowed to speed up the block up to the maximum allowable speed, at which point the operators control of block speed is limited to reducing block speed. Each task can have multiple maximum allowable speeds, which can vary based on specified conditions. When the hookload is light or the remaining equipment in the well is small, the lock-up feature for the transmission can be disengaged in addition to the block speed governing feature.
Abstract:
Procédé de manutention d'un câble caréné (1) au moyen d'un carénage (2), ledit câble étant remorqué par un navire (100) à bord duquel est embarqué un treuil (5) permettant d'enrouler et de dérouler le câble caréné (1) au travers d'un dispositif de guidage (4) du câble caréné, le procédé comprenant : - une première étape de surveillance (10) du câble (1) permettant de détecter si le carénage (2) subit une double torsion autour du câble comprenant une torsion complète immergée et une torsion complète aérienne, - et, lorsqu'une double torsion est détectée, une première étape de hissage (11) du câble caréné (1) lors de laquelle on hisse le câble caréné (1), la première étape de hissage (11) étant mise en oeuvre de façon que la torsion complète immergée sorte au moins partiellement de l'eau et ne pénètre pas dans le dispositif de guidage (4).
Abstract:
According to one embodiment of the present invention, a wire flying system is constituted as follows: an object is hung on a wire such that said object is moved in a three-dimensional space, wherein the length of the wire is adjusted by a winch; the three-dimensional space includes a first range, a second range in which the length of the wire is within a preset safe length, and a third range in which the length of the wire is within a preset permissible length; a local safe device delivers information on a deviation from the first range to a control unit, if a local safe logic determines that an operating range of the wire is deviated from only the first range; the control unit controls a motor unit by delivering a software limit signal to a servo system unit, so that the operating range of the wire is set to be within the first range again; the local safe device delivers information on a deviation from the second range to the control unit, if the local safe logic determines that the length of the wire is deviated from the second range; the control unit stops the operation of the motor unit by delivering the software limit signal to the servo system unit; and a limit switch senses a hardware limit state and stops rotation of a drum unit by mechanically stopping the operation of the motor unit such that hardware safe control is performed, if the local safe logic determines that the length of the wire is deviated from the third range.
Abstract:
본 발명은 와이어 로프가 감길 수 있는 중공형 드럼 및 상기 드럼에 회전력을 제공하는 구동모터가 설치된 본체와, 상기 와이어 로프에 매달리고 하단에는 기기 결합부가 마련된 승강체와, 상기 본체와 상기 승강체에 각각 설치되고 상기 와이어 로프의 권상에 의해 상기 승강체가 상승하여 상기 본체와 결합되었을 때 서로 접촉되는 상부 접점부 및 하부 접점부를 포함하는 고소 설치 기기용 승강장치의 제어 방법에 있어서, (a) 본체와 승강체 간의 결합상태에서 하강 신호를 출력하는 단계; (b) 상기 하강 신호에 따라 상기 승강체가 상기 본체로부터 정상적으로 하강이탈 하였는지 판단하는 단계; 및 (c) 상기 승강체가 정상적으로 하강이탈을 못하였을 경우 상기 구동모터를 정지시키거나 상기 단계 (a)를 재수행하는 단계;를 포함하고, 상기 단계 (b)는, 상기 와이어 로프에 상기 승강체의 하중이 가해져 있는지 여부를 확인하여 상기 승강체가 상기 본체로부터 정상적으로 하강이탈 하였는지 판단하는 것을 특징으로 하는 고소 설치 기기용 승강장치의 제어 방법을 개시한다.