30results about How to "Avoid lifting accidents" patented technology

The invention discloses a real-time fault diagnosis and early warning device and a real-time fault diagnosis and early warning method for a wire rope of a coal mine hoist, and belongs to a device and a method for fault diagnosis of the wire rope of the hoist based on on-line monitoring data. A core processing module of the device is simultaneously connected with a data storage module, a program storage module, a liquid crystal and touch screen control module, a data acquisition module, an Ethernet module and an alarm module; and a power module is connected with all the modules to provide power for all the modules. The method comprises the following steps of: calculating loss percentage of the sectional area of the wire rope; transmitting real-time data of the section area of the wire rope into the core processor module through an Ethernet interface; comparing with an initial value of the section area of the wire rope; and outputting in the form of loss percentage of the sectional area of the wire rope. The device and the method have the advantages that safety parameters are set aiming at application places of the wire rope; the application is flexible; the working state of the wire rope can be judged according to the on-line monitoring data; the real-time fault diagnosis and early warning function of the wire rope can be realized; and alarm information is given.

The invention discloses a real-time generation method of a hoisting scheme of a jib crane in a vehicle controller and a method thereof, according to the method, an autonomous detection learning by the crane jib is employed, profile and position information of an obstacle in an operation area can be accurately acquired; source position and target position information of an hoisting object which are acquired by the crane jib are employed, according to an environment data table in the hoisting operation area, by combining the a hoisting performance chart of the crane, the hoisting scheme comprising parameters such as crane jib length, rotation direction and a lower elevation angle of each rotation angle enables real-time generation in a vehicle controller, and the generated hoisting scheme is optimized and simulated. The practical hoisting application shows that the system can accurately acquire the environment data in the operation area and can generate the hoisting scheme through optimization.

The invention discloses a batch machining device and technology for reinforcing-steel-bar straight threads. The machining device comprises a left reinforcing-steel-bar straight thread machining device body, a right reinforcing-steel-bar straight thread machining device body, a left protective shed, a right protective shed and an automatic conveying platform for conveying to-be-machined reinforcing steel bars. The left reinforcing-steel-bar straight thread machining device body and the right reinforcing-steel-bar straight thread machining device body are used for machining the two ends of the to-be-machined reinforcing steel bars respectively. The automatic conveying platform is located between the two reinforcing-steel-bar straight thread machining device bodies. Each reinforcing-steel-bar straight thread machining device body comprises a reinforcing-steel-bar cutting device for cutting the to-be-machined reinforcing steel bars and a straight-thread threading machine for carrying out threading on the to-be-machined reinforcing steel bars. The automatic conveying platform comprises a reinforcing-steel-bar containing frame, a first transverse conveying frame, a threading machining frame and a reinforcing-steel-bar longitudinal movement mechanism. The machining technology includes the steps of 1, reinforcing-steel-bar lifting; 2, reinforcing-steel-bar cutting; 3, reinforcing-steel-bar secondary forward moving; 4, reinforcing-steel-bar threading; 5, reinforcing-steel-bar third-time forward moving. The machining device and technology are reasonable in design, easy and convenient to machine, manufacture, use and operate and good in use effect; the reinforcing-steel-bar straight thread batch machining process can be easily, conveniently and rapidly completed.

The invention relates to an intelligent tower crane system and an operating method thereof. The intelligent tower crane system comprises a boom, a control unit, a lifting hook unit and a beacon generator, wherein the beacon generator is positioned on a loading and unloading operation area; the control unit is mounted in a tower crane operating room and is used for controlling the boom and a lifting hook unit; the lifting hook unit comprises a safety clearance detection unit and a sound-light alarm unit and measures distance in real time through the safety clearance detection unit and the beacon generator; when the distance is lower than a limit value, the sound-light alarm unit gives an alarm and sends an alarm signal to the control unit. The intelligent tower crane system and the operating method thereof measure the distance in real time through the safety clearance detection unit and the beacon generator; when the distance is lower than the limit value, the alarm is given, and therefore an hoisting accident is avoided. The intelligent tower crane system also has a self-learning function and can identify material types according to weight and record the hoisting track according to the material types so as to realize automatic hoisting, and the intelligent degree of the tower crane is improved.

The invention discloses a compensation protection device for door lock during the maintenance of an elevator. The compensation protection device comprises a maintenance circuit which is sequentially provided with a maintenance control circuit and a maintenance relay; the maintenance circuit is externally connected with a power supply by a power input point and a power output point; a crossover compensating circuit which is connected with the maintenance control circuit in parallel is arranged between the power input point and the maintenance relay; the crossover compensating circuit is provided with an electronic control system. The compensation protection device is convenient and can improve the efficiency in the maintenance work; after the structure is reasonably reformed, the compensation protection device can safely and rapidly remove the fault during the maintenance of the elevator by the series connection of a single-pole double-throw switch and a compensation reset button, and the accident that a lift car goes up and down all the same under the condition that a door is opened due to misoperation can be avoided; the whole structure of the compensation protection device is easy in installation and maintenance, and the compensation protection device is beneficial for technical popularization and application.

The invention provides an automatic oiling method for a skip bucket unloading curved rail, and relates to the technical field of mining equipment. According to the automatic oiling method for the skipbucket unloading curved rail, skip bucket unloading curved rail automatic oiling equipment is applied, and coal slime removing and segmented automatic oiling lubricating operation are sequentially conducted. In the operation process of a skip bucket lifting system, coal slime adhering to an unloading wheel is removed before oiling, the coal slime is completely removed, the water consumption is low, automatic oiling lubrication operation is conducted on the unloading wheel and the curved rail after the coal slime is removed, the oil consumption consumed by oiling lubrication operation is low,and after the unloading wheel operates for a long time, if the posture of the unloading wheel deviates, the lifting system can be controlled to stop in time, and lifting accidents caused by the fact that an unloading wheel with the deviated posture impacts a curved rail are avoided.

The invention discloses a method and system for controlling a winch of a crane to move relative to a lifting arm. The method includes the following steps of receiving a ground mode command, controlling the distance between a hook and the ground to be unchanged according to the luffing amplitude when the lifting arm carries out luffing motions, controlling the distance between the hook and the ground to be unchanged according to the stretching and retracting lengths when the lifting arm stretches and retracts, and receiving an arm tip mode command, keeping the hook in the current state when the lifting arm carries out the luffing motions, and controlling the distance between the hook to the arm tip to be unchanged according to the stretching and retracting lengths when the lifting arm stretches and retracts. According to the method and system, four work modes are set, in the manipulation process, the distance from the hook to the arm tip or to the ground is automatically kept unchanged, and manual control is needless. Compared with background technologies, on one hand, the method and system achieve automated control and effectively avoid occurrence of hoisting accidents; on the other hand, the distance from the hook to the arm tip or to the ground is controlled to be unchanged so that the method and system are suitable for different working condition requirements, and the control effect is good.

The invention discloses a method for hoisting a low-clearance super-long reinforcement cage into a hole section by section under a high-voltage line. The method comprises the following steps of (a) cleaning a site; (b) assembling a reinforcement cage; (c) butting two sections of reinforcement cages; (d) positioning; and (e) hoisting section by section. The method for hoisting the reinforcement cage into the hole in a segmented mode is adopted, pile holes of different depths can be flexibly adapted, the enough reinforcement cage burying depth is guaranteed, the problem that construction is not allowed within the vertical distance range of 6 m of the high-voltage line is solved, the construction operation of hoisting the long reinforcement cage into the hole at the limited height is achieved, the hoisting weight of the single-section reinforcement cage is more effectively controlled, the accident of hoisting instability of the whole-section reinforcement cage is avoided, and the safety of constructors and equipment is guaranteed.

The invention relates to the technical field of hoisting equipment, and discloses large box girder hoisting equipment. The large box girder hoisting equipment comprises supporting legs, a supporting frame is fixedly connected to the bottom end of a steel rope, a driving rod is slidably connected to the bottom end of the supporting frame, supporting blocks are fixedly mounted at the positions, on the two sides of the driving rod, of the bottom end of the supporting frame, first sliding rods are fixedly mounted on the inner walls of the supporting blocks and the supporting frame, first moving blocks are slidably connected to the first sliding rods, driving rods are fixedly mounted at the bottom ends of the first moving blocks, second sliding rods are fixedly mounted in first grooves, supporting plates are slidably connected to the second sliding rods, first contacts are fixedly mounted on the supporting plates, second contacts corresponding to the first contacts are fixedly mounted at the bottom ends of the first grooves, and an alarm is fixedly mounted on the outer side wall of the supporting frame. By arranging an alarm mechanism, an operator is reminded, hoisting operation is stopped in time, and therefore, larger hoisting accidents are avoided.

The invention provides skip bucket unloading curved rail automatic oiling equipment, and relates to the technical field of mining equipment. The skip bucket unloading curved rail automatic oiling equipment comprises a curved rail, a guide rail, sliding rails, a telescopic cylinder, a first oiling pipeline, a second oiling pipeline, a third oiling pipeline, an oil source, a water conveying pipeline, a water source, a high-pressure air pipeline, a high-pressure air source and a control unit. In the operation process of a skip bucket lifting system, coal slime adhering to an unloading wheel is cleared away before oiling, the coal slime is cleared away thoroughly, the water consumption is low, segmented automatic oiling lubrication operation is conducted on the unloading wheel and the curved rail after the coal slime is cleared away, the oil consumption consumed by oiling lubrication operation is low, and after the unloading wheel operates for a long time, if the posture of the unloading wheel deviates, the lifting system can be controlled to stop in time, and lifting accidents caused by the fact that an unloading wheel with deviated postures impacts a curved rail are avoided.

The invention discloses a rigging placing rack for large equipment hoisting. The rigging placing rack for large equipment hoisting comprises a placing rack body. The placing rack body comprises a first step layer, wherein a plurality of storage boxes are connected to the first step layer; a nameplate is connected to the front side of the storage boxes; a second step layer is connected to the upperedge of a back plate of the first step layer; a shackle storage box is connected to the second step layer; a partition plate is arranged in the shackle storage box; a third step layer is connected tothe upper edge of a back plate of the second step layer; a rotary disc is connected to the third step layer; a winding column is connected to the upper side of the rotary disc; and a back baffle plate is connected to the back end of the third step layer. The rigging placing rack for large equipment hoisting disclosed by the invention has the beneficial effects that the rigging placing rack for large equipment hoisting is divided into the first step layer, the second step layer and the third step layer, so that different rigging accessories can be stored in a classified manner; the storage boxes are fixedly connected to the first step layer, and lifting lugs for the rigging can be placed therein; and the storage boxes are connected to the first step layer, so that the different lifting lugs can be finely classified secondarily, and the name plate is connected to the front side of the storage boxes.

The invention belongs to the field of hoisting operation safety control, and discloses a gantry crane brake swing early warning system and method for subway shield tunnel segment hoisting. The early warning system comprises a hoisting data acquisition module, a data analysis and prediction module and a segment swing early warning module, wherein the hoisting data acquisition module is used for acquiring spatial information of subway segments in the underground hoisting process in real time; the data analysis and prediction module reasonably predicts the future hoisting track of the subway segments through the acquired data; and the segment swing early warning module calculates and judges the possible swing size of the subway segments according to the hoisting prediction track and outputs acorresponding early warning signal. Hoisting track prediction is performed based on the composite model of data driving and motion analysis so that early warning control can be performed on unsafe swing of the subway segments in the hoisting deceleration brake stage through the reasonable and accurate prediction track, safety control of the underground hoisting process of the subway segments canbe optimized and the subway segment hoisting accident can be actively avoided.