7results about How to "Avoid falling accidents" patented technology

The utility model discloses an elevator maintenance anti-falling rod, and relates to the technical field of elevator maintenance protection devices, the elevator maintenance anti-falling rod comprises an anti-falling handrail assembly placed on the inner side of a building elevator opening and a fastening assembly, and the fastening assembly comprises a pressing unit and a locking unit; the pressing unit is used for conducting pressing operation on the inner walls of building elevator openings with different widths, so that the anti-falling handrail assembly is installed and fixed. The locking unit is used for conducting locking operation on the pressing state of the pressing unit. By arranging the fastening assembly, the anti-falling handrail assembly can be fixedly installed on the inner side of the building elevator opening, and by intercepting and protecting the inner side of the building elevator opening through the anti-falling handrail assembly, non-maintenance personnel can be effectively prevented from entering the elevator opening by mistake in the elevator maintenance period and falling into a well; and the safety protection effect during elevator maintenance is further improved.

The application discloses a large-tonnage deep-well hoist bucket loading compensation device and method. The device comprises a one-way check compensation mechanism, which is installed in a shaft and located below a bucket loading position. The one-way check compensation mechanism can extend to the side of the bucket or be retracted. A first position sensor is used to detect whether the bucket reaches the loading position. A second position sensor is used to detect whether the one-way check compensation mechanism extends to the position. A third position sensor is used to detect whether the one-way check compensation mechanism retracts to the position. A controller is connected with the first, second and third position sensors at the signal input end and connected with the one-way check compensation mechanism at the signal output end. The loading compensation device can lock the bucket in one direction and automatically retract when the bucket is lifted, which can avoid the bucket damage and material spilling caused by the large impact when the bucket is loaded due to the large sinking amount of the bucket.

This invention discloses a constant torque anti-jamming wellbore dressing device and its usage method. The device includes: an upper connector, a constant torque mechanism, a central tube, and a lower connector connected in sequence; a reduced diameter anti-jamming mechanism and a milling dressing mechanism installed outside the central tube; a torque transmission component of the constant torque mechanism transmits the torque from the upper connector to the central tube; a first shear pin is provided between the constant torque mechanism and the central tube, which can be sheared when the reverse torque force exceeds a set threshold; a torque setting component of the constant torque mechanism is used to set the torque under normal operating conditions; the reduced diameter anti-jamming mechanism can move up and down under the pressure difference between the inside and outside of the central tube; the first conical surface of the reduced diameter anti-jamming mechanism and the second conical surface of the milling dressing mechanism cooperate, and when the reduced diameter anti-jamming mechanism moves up and down, the protrusion of the milling dressing mechanism extends or retracts. It can set the torque, prevent drill pipe from falling off, effectively prevent stuck drill pipe, and improve the efficiency of wellbore dressing operations.

This invention relates to the field of highway bridge anti-collision technology and proposes a highway bridge anti-collision device for traffic construction, including a bottom fixing block, a slope block, a fixing column, a top fixing block, a fixing shaft, an auxiliary guiding component, a first braking component, a second braking component, and a protective component. The bottom fixing block is used to install on one side of the highway bridge, and the slope block is installed on the side wall of the bottom fixing block. Through the above technical solution, the problem of existing technology where, when the driver is drowsy, there is no external interference to provide the driver, causing the car to crash into the guardrails on both sides of the bridge. Furthermore, since the existing guardrails can only provide a simple protective measure and cannot neutralize the energy generated by the impact, the car often suffers irreversible consequences after hitting the guardrail. In some cases, due to excessive speed, the car rolls over after hitting the guardrail and falls off the highway bridge.

The utility model discloses a young donkey supplementary feeding partition fence for livestock breeding, concretely relates to the technical field of livestock breeding, including the partition fence subassembly for partitioning young donkey supplementary feeding, the partition fence subassembly includes two fixed piles and the barrier fence, the barrier fence is located between two fixed piles, and the one side of fixed pile corresponds the barrier fence and is provided with the clamping hole, the both ends of barrier fence respectively extend to the inside of the clamping hole on two fixed piles, the utility model discloses the displacement of barrier fence is positioned through the clamping hole, makes barrier fence only can carry out vertical type's up and down displacement, thereby make the barycenter of barrier fence lower and guarantee structural stability, avoid the condition that partition fence subassembly disperses apart under the impact of colt, and when the barrier fence is subjected to the force from different directions, can be more evenly scattered to whole barrier fence structure, reduced the situation that the local force is too big and leads to damage, thereby guarantee the isolation effect of partition fence subassembly.

This application discloses a hot-dip galvanizing lifting device for guardrails, including a lifting assembly, multiple traction ropes, multiple swing assemblies, and multiple clamping assemblies. The clamping assemblies are connected to the swing assemblies, and are connected to the lifting assembly via the traction ropes. Each swing assembly includes a base, a rotating shaft, and a swing drive mechanism. The rotating shaft is rotatably connected to the base, and the swing drive mechanism is housed within the base and connected to the rotating shaft. Each clamping assembly includes a support seat, a lifting mechanism, a bearing seat, and a clamping mechanism. The support seat is fixedly connected to the rotating shaft via a connecting frame. The lifting mechanism is mounted on the support seat, the bearing seat is fixedly connected to the movable end of the lifting mechanism, and the clamping mechanism is pivotally connected to the bearing seat. This effectively improves the stability of the guardrail during lifting and the efficiency of hot-dip galvanizing. It also effectively removes residual impurities and bubbles from the guardrail surface, thus ensuring a tight bond between the zinc layer and the substrate and improving the protective performance of the guardrail.

The application belongs to the technical field of drilling equipment, and discloses a cluster type down-the-hole hammer front guide structure, which comprises a cluster body, a central pipe for transmitting torque and rotating speed and serving as a residue discharge channel; a double-wall short joint is arranged on the outer side of the top of the central pipe and used for connecting a double-wall drill rod; an air chamber upper cover plate, an air chamber peripheral cylinder, an air chamber lower cover plate, an intermediate plate, a front joint positioning plate and a bottom lip plate are sequentially arranged below the double-wall short joint; and the air chamber upper cover plate, the air chamber lower cover plate, the intermediate plate, the front joint positioning plate and the bottom lip plate are sequentially sleeved on the outer side of the central pipe to form the cluster body; the large-diameter cluster type pneumatic reverse circulation down-the-hole hammer reamer bit solves the problems of residue discharge difficulty and low drilling efficiency of the conventional reamer bit; the cluster type down-the-hole hammer is combined with high-pressure air driving, the crushing efficiency is significantly improved, and the drilling efficiency is improved by more than 10 times compared with the conventional positive circulation cluster type pneumatic down-the-hole hammer reamer bit.