34results about How to "Avoid overturning accidents" patented technology

The invention belongs to the technical field of air traffic control radars, and particularly relates to an octave rain-proof adjusting component and an air traffic control radar antenna elevation mechanism employing the same. The adjusting component comprises a bottom support shaft, a middle rotary thread sleeve and a top rainproof sleeve, which are coaxially sleeved one by one, wherein the top rainproof sleeve is in a sleeve structure of which an opening is downward; and the middle rotary thread sleeve can carry out rotary motion along the axis, so that the bottom support shaft and the top rainproof sleeve carry out axially opposite or separate synchronous screw-thread fit motion. Compared with a traditional structure, the component has smaller minimum length and longer jacking stroke when having extremely high rain-proof capability; and the working performance can be significantly improved. Meanwhile, the invention provides the air traffic control radar antenna elevation mechanism employing the adjusting component. The air traffic control radar antenna elevation mechanism structurally comprises a three-point support system comprising two groups of octave rain-proof adjusting components and a group of hinge seats, so that the maintenance frequency of the existing air traffic control radar antenna elevation mechanism is significantly lowered.

The invention relates to a tower crane electrical dual protection system. The tower crane electrical dual protection system is composed of an electrical control system and a safety monitoring system with electrical limiting and action protecting functions. According to the safety monitoring system, a main loop current mutual inductor, a lifting capacity sensor, a lifting torque sensor, a tower body and tower arm dip angle sensor, a trolley range and hoisting height sensor, a rotation angle sensor, a jacking oil pressure continuous quantity sensor and an information collecting loop are newly added on the basis of the content required to set by gb / t28264-2017, a newly-added information processing part is included and regards the rated lifting torque, the tower body and tower arm dip angle, the trolley range, the hoisting height, the rotation angle, the tower body and tower arm dip angle, the jacking oil pressure and the current sudden change as the electrical limiting and action protecting and monitoring targets, wherein the current sudden change happens when the lifting torque or the lifting capacity or the rotation speed is limited; and an interaction voice service unit meeting theman-machine interaction requirement is additionally arranged.

The invention discloses a scraper conveyor and its working method, wherein the scraper conveyor includes a general frame, a coal falling conveying part and a follow-up coal falling guide part, the coal falling conveying part is installed on the general frame, and can The coal on the upper surface of the overall frame is transported away, and the coal falling guide part is installed on one side of the overall frame, and the crushing assembly moves with the movement of the coal cutter, so that the coal seam cut by the coal cutter falls onto the overall frame through the crushing assembly On the surface. The scraper conveyor is easy to propel to the coal seam and the scraper conveyor can always be in a horizontal state, which can ensure that all the coal cut by the coal cutter falls on the scraper conveyor. The scraper conveyor disclosed by the invention is durable.

The invention provides a fault double-layer redundant monitoring method, an early warning method and a system, which belong to the technical field of engineering machinery control. The method includes: obtaining sensor data of each operation parameter based on the sensor groups corresponding to the operation parameters on the hoisting device; in the first-level monitoring, based on whether the relevant actual detection value in the sensor data satisfies the configuration conversion relationship to determine whether the hoisting equipment is in the first fault condition, wherein the conversion relationship includes the geometric conversion relationship between the operating parameters corresponding to the relevant actual detected values; in the second-level monitoring, based on the Whether the actual detected value corresponding to the torque in the sensor data satisfies the torque balance relationship with the operating parameters of the corresponding torque, it is determined whether the hoisting device is in the second fault condition, wherein the hoisting device is not in the second fault condition. the first fault condition. The present invention can be used for equipment failure monitoring.

The invention discloses a stabilizing method and a stabilizing system capable of preventing overturn of a log grabbing and lifting truck, and relates to the technical field of integral truck stabilization. The stabilizing method includes: acquiring a first signal, acquiring a second signal according to characters of the first signal; according to the acquired second signal, computing and outputting overturning moments of an integral truck; comparing a longitudinal overturning moment value with a first preset anti-overturning moment value to obtain a first comparison result, and / or comparing atransverse overturning moment value with a second preset anti-overturning moment value to obtain a second comparison result; judging whether the first comparison result satisfies a first preset threshold value or not, and / or judging whether the second comparison result satisfies a second preset threshold value or not; when the first comparison result cannot satisfy the first preset threshold value, and / or the second comparison result cannot satisfy the second preset threshold value, sending an alarm signal by an integral truck controlling system. The stabilizing method and the stabilizing system have the advantages that the truck is prevented from overturning when a mechanical arm is working, and a technical effect on ensuring stability of the truck is guaranteed.

The invention discloses a method, device and system for movable hoisting machinery rollover protection for improving operating security of the movable hoisting machinery, wherein the method comprises the following steps of: acquiring first operating parameter information of an arm frame of the movable-hoisting machinery through a first detection device, acquiring forerake parameter information of a vehicle body of the movable hoisting machinery through a second detection device and acquiring second operating parameter information of a derricking cylinder of the movable hoisting machinery through a third detection device; using a torque balance equation to determine the gravity information of an object hoisted by the movable hoisting machinery by according to the first operating parameter information, the forerake parameter information and the second operating parameter information; and outputting a rake alarm indication so that the movable hoisting machinery cuts operations in the rake direction if the physical value corresponding to the gravity information is greater than the set threshold.

The invention discloses a device and method for calculating the height of the center of gravity of a container ship. The device includes a processor unit, a main board, a memory unit, a data storage unit, a display unit, a water gauge sensor and an inclination sensor. The processor unit is used for Process the received data and calculate the height of the center of gravity of the ship and output it; the memory unit is used to send the stored reference data of the ship to the processor unit through the main board; the data storage unit is used to read and store the processor unit The data output by the unit; the display unit is used to display the data output by the processor unit; the water gauge sensor is used to collect draft data and send it to the processor unit, and the inclination sensor is used to collect the horizontal and vertical Dump state data and send to the processor unit. The invention can quickly, accurately and reliably give the height of the ship's center of gravity, use it to perform stability criteria, and avoid the occurrence of ship capsizing accidents.

The invention belongs to the technical field of pilotage, and relates to a method for safely transferring a pilot to a work boat from a pilot boat. The method comprises the steps that two parallel supports are arranged on the pilot boat; the ends of the two supports are each connected with a suspension device; the two suspension devices are connected with lifting hooks fixed to the head end and the tail end of the work boat through the ends of chain rings respectively; the suspension devices are started, so that the two ends of the work boat descend at the same time till a deck of the work boat is aligned at a deck of the pilot boat; and the suspension devices stop working. In the process that the pilot boards the work boat, the work boat is closely connected with the pilot boat and cannot shake, and therefore the pilot can safely board the work boat.