15results about "Vertical bridges" patented technology

The invention discloses a large-span and large-tonnage vertical lifting movable bridge and an opening method, and relates to the technical field of bridges, the large-span and large-tonnage vertical lifting movable bridge comprises a main beam, four bridge towers, cross beams between the towers, supports, four double-drum winches and eight balancing weights; the section of each bridge tower is shaped like a Chinese character'wang ', four grooves are formed in each bridge tower, two grooves serve as running channels of a main beam lifting point, and the other two grooves serve as running channels of a balancing weight; the main beam is provided with eight symmetrical lifting points, the double-winding-drum winch comprises coaxial double winding drums, the two ends of the steel wire rope are connected with the lifting points and the balance weight respectively, and the balance weight balances more than 97% of the weight of the main beam. The double-drum winch is adopted, the pressure of a hoisting point is dispersed, and the compact layout of the bridge tower shaped like the Chinese character'wang 'is combined, so that the structural design, manufacturing and mounting difficulty is reduced, the limitation of the traditional technology is broken through, larger span and tonnage requirements are met, land and waterway traffic is considered, and the practicability and the popularization value are high.

The application discloses a method for increasing the width of a tunnel for vehicle meeting, which comprises the following steps: placing a steel structure platform on a tunnel entrance road surface; making the bottom plate close to the lining side wall of the tunnel and adjusting the length of the lifting hydraulic rod of the lifting hydraulic cylinder to make the parking platform plate be located at a certain height; horizontally moving the parking platform plate until the parking platform plate is close to the lining side wall of the tunnel and the side wall supporting shoe assembly is supported on the lining side wall of the tunnel; and adjusting the length of the telescopic hydraulic rod of the telescopic hydraulic cylinder to adjust the position of the lower longitudinal beam which is arranged away from the lining side wall and to support the parking platform plate. The method has the advantages that the width of the tunnel for vehicle meeting is increased by utilizing the recessed space of the lining side wall, the problem of difficult vehicle meeting in the process of single-line small-section tunnel excavation is solved, the load is dispersed by supporting the side wall supporting shoe assembly on the lining side wall, the gravity center of the steel structure platform is adjusted by the telescopic hydraulic cylinder, and the stability of the steel structure platform is ensured.

The invention discloses a gear vertically-driven suspension bridge gate flood and tide retaining system which is characterized in that a suspension bridge gate, bent frames, a vertical gear driver and the like cooperatively operate, the two bent frames are symmetrically arranged in opening and closing towers on two banks of a river channel, an upstream face is provided with a simply-supported bracket, and the top and the periphery of the upstream face are provided with a traction cable, a guide pulley block and a traction controller; and a vertical rack and a hoop type vertical gear driver are arranged on the side vertical surface. The suspension rotation bridge gate is of a flat plate type and is provided with a steering bearing penetrating through a gate body. During daily opening, the upstream side of the gate is placed on the simply-supported bracket, and the downstream side of the gate is horizontally embedded into a transmission cavity of the vertical gear driver through the steering bearing to form a horizontal supporting system with the simply-supported bracket. The traction cable is connected with the gate upstream lifting point and the traction controller, so that the gate can turn over around the downstream steering bearing. A built-in gear of the vertical gear driver is meshed with a rack of the bent frame and matched with traction of the traction cable to form locking, rotation and up-down displacement, the gate is driven to be opened and closed, and the requirements for large-span high-water-head long-stroke operation, shipping and communication are met.

The invention relates to the technical field of bridge engineering, and provides a checking method and system which fit the structural characteristics of a lifting type movable bridge, consider the multi-factor coupling effect and are accurate in calculation aiming at the problems that a calculation model is excessively simplified and actual working condition parameters are not combined with the structural characteristics of the lifting type movable bridge and the like in an existing checking method. The method comprises the following steps of: calculating total equivalent rotational inertia and total equivalent translational mass of all parts including a motor, a speed reducer, a working brake, a winding drum, a bridge body and a balancing weight; according to the performance parameters of the safety brake and the working brake, the winding drum side safety braking translation acceleration, the winding drum side working braking translation acceleration and the unbalanced load translation acceleration are calculated; calculating an impact load coefficient of the system; on the basis, the stroke safety of the bridge body and the strength and skid resistance of the steel wire rope are checked. According to the method, the accurate checking method adaptive to the impact effect of the lifting type movable bridge under the emergency shutdown working condition is realized, and a scientific basis is provided for design, debugging test and safe operation of the movable bridge.

A gangway for use with a container to be accessed is provided. The gangway comprises a fixed platform and a support structure connected to the fixed platform in a manner that allows the support structure to rotate with respect to the fixed platform between a raised stowed position and a lowered deployed position. An end platform is pivotally connected at the distal end of the support structure, the end platform defining an upper walking surface and a bottom surface that engages the top of the container, the height between the bottom surface and the walking surface being no greater than one inch.

The invention provides a movable bridge guiding device adapting to temperature difference deformation and an arrangement method, and belongs to the field of water transportation and bridge engineering. The device comprises a movable bridge, a bridge tower, a track embedded part and a guide device. The guide device comprises an X-direction limiting type, a Y-direction limiting type, an X-direction limiting type and a Y-direction limiting type, and each limiting type is composed of a macromolecule self-lubricating limiting sliding block and a guide frame. The core arrangement method comprises the steps that an XY two-way limiting device is arranged at a first bridge tower and serves as a temperature difference deformation starting fixing point; a Y-direction limiting device is arranged at the second bridge tower, and X-direction deformation is allowed; an X-direction limiting device is arranged at the third bridge tower, and Y-direction deformation is allowed; and the fourth bridge tower is not restrained so as to release the maximum deformation. Through differential constraint and use of high-performance self-lubricating sliding blocks at key parts, the problems of stretching and buckling deformation caused by temperature difference of a large-span movable bridge are effectively solved, the adaptive capacity, the operation stability and the long-term durability of a guiding system are remarkably improved, and the maintenance cost and the safety risk are reduced.

The present application relates to the technical field of bridge engineering, aiming at the problems of existing checking method, such as excessive simplification of calculation model, not combining actual working condition parameters and improving the structural characteristics of opening bridge, the present application provides a checking method and system which is in line with the structural characteristics of lifting opening bridge, considers the coupling action of multiple factors and is accurate in calculation. The method comprises: calculating the total equivalent rotational inertia and the total equivalent translational mass of each component including motor, speed reducer, working brake, drum, bridge body and counterweight; calculating the translational acceleration of drum side safety brake, the translational acceleration of drum side working brake and the translational acceleration of unbalanced load according to the performance parameters of safety brake and working brake; then calculating the impact load coefficient of the system; on this basis, checking the stroke safety of the bridge body, the strength of the steel wire rope and the anti-skid. The present application realizes the precise checking method which is suitable for the impact action of emergency shutdown working condition of lifting opening bridge, and provides a scientific basis for the design, debugging test and safe operation of opening bridge.

This invention discloses a fixed winch-type ship lock traffic bridge lifting system and method based on balance shaft synchronization, belonging to the field of multi-drive point control system technology. The system includes the following steps: displacement sensors and load sensors are respectively installed at at least two drive adjustment lifting points; real-time height and load data of each lifting point are obtained; the deviation of each lifting point relative to a target reference value or system average value is calculated, including height deviation and load deviation; when any deviation exceeds a set threshold, the PLC controller calculates a speed compensation amount based on the current control gain parameters and outputs the speed compensation amount to the drive execution unit through the motion control module. This invention effectively alleviates stress concentration problems and significantly improves structural safety and service life.

The utility model relates to the technical field of stage machinery, in particular to a broken bridge trawl device. The broken bridge trawl device comprises a lifting translation broken bridge and a protective structure, and the protective structure is connected with the lifting translation broken bridge through a connecting assembly. The lifting translation broken bridge can rotate around the connecting assembly to be parallel to the protection structure and drive the protection structure to move synchronously. According to the broken bridge trawl device provided by the utility model, the protection structure is arranged, so that an actor does not fall into water when the actor climbs on and leaves the lifting translation broken bridge and performs, and the performance safety of the actor is ensured.

The utility model relates to the technical field of floating bridges, in particular to a self-adjusting lifting type floating bridge. The bridge floor panel is used as a bridge floor, the floating block is arranged below the bridge floor panel and used for bearing the bridge floor panel, the bridge floor panel is provided with a lifting adjusting device used for adjusting the distance between the bridge floor and the water surface, the lifting adjusting device comprises a second steel wire rope, a heavy block and an electric capstan, and the electric capstan is fixedly connected with the bridge floor panel. The electric capstan is connected with the heavy block through a second steel wire rope; a liquid level detection device used for detecting the distance between the bridge floor and the water surface is arranged on the bridge floor panel, and the liquid level detection device is electrically connected with the electric capstan; in the construction process, the building structure can be constructed oppositely from the two banks at the same time, so that the construction efficiency can be improved; when the liquid level detection device detects that the horizontal plane rises, the driving electric capstan is triggered to release the second steel wire rope, so that a certain distance is kept between the bridge deck panel and the horizontal plane.