36results about How to "Solve lifting difficulties" patented technology

The invention discloses a portable crane used for unloading a cargo oil pump. The portable crane comprises a lifting arm and is characterized in that the lifting arm is broken in the middle to form a first lifting arm body and a second lifting arm body, the first lifting arm body and the second lifting arm body are connected through a flange, a pulley is arranged on the rear side of the lifting arm, a steering wheel is arranged on the portion, close to the other end of the lifting arm, of the rear side of the lifting arm, a fixing support and a steering wheel fixing frame are arranged on a deck face, and a fixed guide wheel is arranged on the top of the fixing support. The lifting arm is designed into the split type, the fixing support and the steering wheel fixing frame are detachably assembled to form a base of the crane, and therefore the portable crane is convenient to store and install; in addition, the method of arranging the pulley on the rear side of the lifting arm is adopted, and therefore the lifting arm can be conveniently moved.

The invention discloses a bridge crane trolley for a mine, which comprises a trolley chassis, wherein a hoisting mechanism is arranged on the trolley chassis; the hoisting mechanism comprises a winding drum which is rotatably installed on the trolley chassis; the hoisting mechanism also comprises a cantilever beam which is fixedly arranged at one side of the winding drum on the trolley chassis and extends out of the trolley chassis; one end of the cantilever beam, far away from the trolley chassis, is provided with a fixed pulley block; a traction rope is wound on the fixed pulley block; and one end of the traction rope is connected to the winding drum, and the other end is fixedly connected with a hoisting appliance. The end part of the cantilever beam, provided with the fixed pulley block, is positioned outside a main beam, therefore, barriers can be effectively kept away when objects in the mine are hoisted, the space is saved and the problem of difficulty in hoisting equipment in the mine is effectively solved.

The invention discloses a lifting appliance for a cylindrical roller bearing without an outer ring, of a wind power gear box. The lifting appliance comprises a central flange, a lifting ring assembly and bearing supports, wherein the lifting ring assembly is installed at the central part of the central flange; a plurality of the bearing supports are arranged and are lined at a fixed distance and installed at the periphery of the central flange in an insertion manner; each bearing support comprises a joint, a first nut, a cylindrical tenon and a clamping corner with a gasket; the joint is fixedly connected to one end of the first nut; the cylindrical tenon is fixedly connected to the other end of the first nut, clamped in a T-shaped groove of the clamping corner, and blocked and limited by the gasket installed on the clamping corner so as to be prevented from separating from the clamping corner; the first nut is rotated forwards and reversely; and the clamping corner is pushed and pulled to axially move through the cylindrical tenon on the first nut, so that the front end surface of the clamping corner is abutted against or separated from the circumferential surface of the inner ring of the cylindrical roller bearing without the outer ring. The lifting appliance disclosed by the invention is high in universality, and capable of effectively achieving the purpose of lifting for the bearing during assembly and reducing the accident risk caused during manual carrying for the bearing.

The present application provides a prefabricated prestressed concrete frame system and a construction method, the frame system includes hollow prefabricated columns and prefabricated composite beams, the prefabricated composite beams are arranged along the circumference of the hollow prefabricated columns, and are fixedly connected On the hollow precast column, the interior of the hollow precast column is poured with concrete; the hollow precast column includes an upper section precast column and a lower section precast column, and the upper section precast column and the lower section precast column pass through multiple Two column connectors are stacked and connected; the column connectors are pre-embedded in the upper prefabricated column, and the lower prefabricated column is pre-embedded with threaded steel bars, and the column connectors are provided with connection holes , after the threaded steel bar passes through the connecting hole, it is tightly connected with the locking nut. According to the prefabricated prestressed concrete frame system and construction method provided in the present application, rapid docking between multiple hollow prefabricated columns can be realized, the requirements for hoisting equipment are reduced, and the construction cost is greatly saved.

The present invention provides a method for characterizing the flow pattern of oil-water two-phase fluid, which includes the following steps: Step 1, dividing the specific temperature and pressure conditions of oil-water two-phase fluid to obtain different sub-temperature and pressure conditions; 2. Under the same sub-temperature and pressure conditions, the flow pattern of the oil-water two-phase fluid is measured with the flow velocity and water holdup of the oil-water two-phase fluid as independent variables, so as to obtain the flow pattern of the oil-water two-phase fluid at different flow rates and different holdups. The corresponding flow pattern under the condition of water rate; step 3, under the same sub-temperature and pressure conditions, draw the flow velocity-water holdup chart used to characterize the flow pattern of the oil-water two-phase fluid to determine the oil-water two-phase fluid flow pattern boundaries. The above method can intuitively and accurately characterize the oil-water two-phase flow patterns under different conditions, laying a foundation for the study of the two-phase flow law of oil-water two-phase fluids, so as to improve the situation that oil is difficult to lift or shut down in vertical wellbore .

The invention discloses a forming method of a large-diameter thin-walled stainless steel barrel. The method includes the following steps that firstly, groove pre-bending and machining are conducted; secondly, stainless steel plates are hoisted to tool supports and fixed to the tool supports; thirdly, turnover is conducted; fourthly, assembling and longitudinal joint welding are conducted; fifthly, weld joint correction is conducted; and sixthly, the tool supports are detached. By means of the large-diameter thin-walled stainless steel barrel formed through the method, hoisting difficulty can be eliminated, ferrite pollution is avoided, the barrel does not need to be overturned, and it is ensured that the circular degree of the barrel meets the process design requirement.