Patent ID: 11919748
Assignee: XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. A method for hoisting transferred materials in an underground auxiliary transportation system, which uses the hoist for the transferred materials in the underground auxiliary transportation system according to claim 4, wherein the method includes following steps:
a method for positioning the hoist: moving, by an operator, a hoist body above a transferring trolley 9, and sending, when a signal from a laser ranging sensor 7 is detected by a photosensitive sensor 8, a prompt signal, where the hoist body is located directly above a standard container and the operator enables the hoist to start for operation; and
reducing, when a roadway is narrow, a size of the hoist to adapt to a narrow and complex terrain of the roadway through contracting a width of a cross beam and folding end beams, and unfolding, when the hoist reaches the underground, the hoist;
a process of lifting heavy weights by the hoist: determining, before the hoist is descended, an operating state of the hoist by a pressure sensor 36, recording the operating state as operating state A, detecting, by a hydraulic lifting system, signals from ejector pin position-limitation sensors 21 and a twist lock closing sensor 18; locking, only when the ejector pin position-limitation sensors 21 have signals and the twist lock closing sensor 18 has no signal, the hydraulic lifting system, and releasing the locking of the hydraulic lifting system during the rest time;
adjusting, according to a signal fed back by the laser ranging sensor 7, a descending speed of the hoist body by the hoist body during the descending process;
ejecting, when the hoist is in contact with the standard container 2, the ejector pins 4, sending, by the ejector pin position-limitation sensors 21, signals to stop the hydraulic lifting system from descending and lock an elevation, meanwhile, driving, by a driving unit, four twist locks at end portions of the hoist body to rotate 90 degrees at the same time, and enabling connecting rods 11 to be in contact with the twist lock closing state sensor 18;
at this time, performing, when a contact signal is not sent by the twist lock closing state sensor 18 beyond a time limit, no actions and sending an alarm by the hydraulic lifting system; and
starting lifting, when the contact signal is sent by the twist lock closing state sensor 18, the hoist body by the hydraulic lifting system, wherein the hydraulic lifting system is in a loading state, monitoring, by the pressure sensor 36, forces received by four twist locks when the standard container 2 is hoisted in real time, and sending, when data for one or more pressure sensors are abnormal and the displayed pressure is 0 or exceeds an upper limit, an alarm by the hoist; and
a process of releasing heavy weights by the hoist: determining, before the hoist body is descended, an operating state of the hoist body by the pressure sensor 36, recording the operating state as an operating state B, changing, according the signals fed back by the laser ranging sensor 7 and a change of a distance, a speed of the hydraulic lifting system by the hoist during the descending process, ejecting, when the hoist body is in contact with the standard container 2, the ejector pins 4, sending signals by the ejector pin position-limitation sensors 21, driving, by the hydraulic lifting system, the hoist to stop from descending and lock an elevation, meanwhile, driving, by the driving unit, the twist locks to rotate 90 degrees in opposite directions, enabling the connecting rods 11 to be in contact with the twist lock opening state sensor 19, at this time, performing, when the contact signal is not sent by the twist lock opening state sensor 19 beyond the time limit, no actions and sending the alarm by the hydraulic lifting system; and
indicating, when the contact signal is sent by the twist lock opening state sensor 19, that the releasing is successful.