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

The invention discloses an assembling method for a large-megawatt wind power gear box outer-ring-free cylindrical roller bearing. The assembling method comprises the steps that firstly, a planet wheel is horizontally corrected; secondly, a bearing sling is assembled; thirdly, a rolling element is tightened through a rubber rope, and radial deflection of the rolling element is eliminated; fourthly, the outer-ring-free cylindrical roller bearing is hoisted; fifthly, the outer-ring-free cylindrical roller bearing and an inner hole of the planet wheel are aligned in the axial direction, then, the bearing is rotated, it is guaranteed that the rolling element makes even contact with the rollaway nest face of the inner hole of the planet wheel and the rolling element falls into the inner hole of the planet wheel and is assembled in place; sixthly, the bearing sling is disassembled; seventhly, a pressing plate is used for pressing an assembled outer-ring-free cylindrical roller bearing, and the planet wheel is turned by 180 degrees and horizontally put on a contour cushion block; eighthly, the third step, the fourth step, the fifth step and the sixth step are repeatedly executed, and assembling of a second outer-ring-free cylindrical roller bearing and an inner hole of the other segment of the planet wheel is completed. The assembling method can effectively solve the problems of bearing hoisting and alignment of the inner holes of the planet wheel during assembling and can effectively avoid the situation that the rollaway nest face is damaged by assembling clamping and accident risks caused when the bearing is carried manually.

The invention discloses a system for removing the paraffin blockage of an oil pipe. The system mainly comprises an outer pipe, a well washing pipe, an upper seal, a lower seal, a self-switching tee joint, a pump, a cleaning liquid pipeline and a heater, wherein the lower end of the outer pipe is fixedly arranged on a wellhead Christmas tree and is communicated with an oil production pipe arranged at the bottom of the wellhead Christmas tree; the lower end of the well washing pipe sequentially passes through the outer pipe and the wellhead Christmas tree, and extends into the oil production pipe; the space between the outer pipe and the well washing pipe is divided into a closed ring space section by the upper seal and the lower seal; the self-switching tee joint is arranged on the well washing pipe and in the closed ring space section; the two ends of the cleaning liquid pipeline are respectively connected with a liquid inlet and a liquid outlet which are arranged on the wall of the outer pipe; the cleaning liquid pipeline is provided with the pump and the heater. After the structural form is adopted, the system is convenient for offshore oilfield paraffin blockage removal operation, and has the characteristics of being simple and convenient to operate, low in cost and high in efficiency.

The invention discloses a vertical hoisting system for glass boards of a special-shaped curtain wall. A fixing steel frame is mounted on a floor above a to-be-hoisted floor in a suspended mode, a top pulley and an adjusting winch are fixedly mounted at the suspended end of the fixing steel frame, and a cableway is obliquely mounted between the fixing steel frame and the ground and composed of two parallel cableway steel wire ropes; sleeves are slidably mounted on the two cableway steel wire ropes, a hoisting steel frame is welded to the two sleeves, a hoisting winch is fixed to the ground, and a hoisting steel wire rope of the hoisting winch winds across the top pulley and then is connected with the top of the hoisting steel frame; and a hoisting pulley is mounted on the upper portion of the side, facing the to-be-hoisted floor, of the hoisting steel frame, and an adjusting steel wire rope of the adjusting winch winds across the hoisting pulley and then is connected with a to-be-hoisted glass board. By means of the vertical hoisting system, rapid, easy, convenient, safe and accurate hoisting and installing of the glass boards of the special-shaped curtain wall are achieved, hoisting difficulties of the special-shaped curtain wall are overcome, the installing efficiency of the curtain wall is greatly improved, and the curtain wall can be repeatedly used for different projects.

The invention discloses a cable line AC voltage withstand test method and system based on a shunt reactor. The method comprises the following steps that: a to-be-tested cable line is equipped with a shunt reactor, and the shunt reactor is used for compensating the ground capacitance current of the cable line; and in a cable line AC withstand voltage test adopting a series resonance mode, the shunt reactor replaces a test reactor to test the AC withstand voltage of the cable line. When the cable AC voltage withstand test is carried out, the shunt reactor of the cable line is adopted to replace a test reactor, and the problems that a large-tonnage test reactor is difficult to transport and hoist and the purchase cost of the test reactor is high are solved.

The invention relates to a hoisting device for large equipment and a hoisting method thereof. The hoisting device and the hoisting method are used for hoisting the equipment to a set floor of a building. The hoisting device comprises a bottom plate, a fixed arm, a sliding rail and a frame body; the fixed arm is fixed on the top surface of the bottom plate and partially protrudes and extends out of the bottom plate; the sliding rail is fixed to the top face of the bottom plate, the sliding rail extends outwards in the protruding and extending direction of the fixed arm and partially protrudes and extends out of the bottom plate, the sliding rail is fixedly connected with a floor slab of the building through a protruding and extending part of the fixed arm so as to fixedly connect the bottom plate and the floor slab, and a protruding and extending part of the sliding rail is arranged on the top face of the floor slab; and the frame body is arranged on the sliding rail in a sliding manner and used for fixing the equipment, and the frame body slides along the sliding rail so as to drive the equipment to move to the floor slab. The hoisting device effectively solves the problem that the large equipment is difficult to hoist; and the equipment is hoisted to the designated floor through the hoisting device and translated and transported into the building, so that the equipment is hoisted to the designated position, a discharging platform does not need to be built, constructors do not need to enter the discharging platform, potential safety hazards are reduced, and time and labor are saved.

The invention discloses a sand making machine provided with an automatic jacking device, belongs to the technical field of sand preparation and solves the problem that an existing device cannot adjustthe position of a hydraulic lifting device according to the position of a cover body. The sand making machine is technically characterized by comprising a stand column, a base, a sand maker and a cover plate, wherein the sand maker is fixedly mounted on the base, the cover plate is arranged at the top of the sand maker, the stand column is vertically arranged on the left side of the upper surfaceof the base, the bottom of the stand column is riveted with the base, a driving cavity is mounted at the top of the stand column and is in sliding connection with the stand column, a first hydrauliccylinder is arranged under the driving cavity and fixedly connected with the stand column through a bolt, and the telescopic end of the first hydraulic cylinder is hinged with the driving cavity. According to the sand making machine, the problem of difficulty in lifting of the cover plate is solved, meanwhile, the position of the lifting mechanism can be adjusted according to different positions and heights where the cover plate is located, so that the burden of workers is relieved, and popularization and application are facilitated.

The invention belongs to the field of building components, and relates to a rotary detachable steel frame and laminated slab connecting structure which comprises a prefabricated bottom plate, a cast-in-place concrete layer poured on the prefabricated bottom plate and a plurality of square steel pipes detachably fixed to the prefabricated bottom plate and playing a supporting role. Square holes are formed in the sides, away from the prefabricated bottom plates, of the square steel pipes, steel pipe holes are formed in the sides, facing the square holes, of the square steel pipes, and bottom plate holes with the two sides communicated are formed in the prefabricated bottom plates corresponding to the steel pipe holes. Large n-shaped embedded parts, T-shaped connecting pieces matched with the embedded parts for use and nuts used for fixing the connecting pieces are mounted in the steel pipe holes and the corresponding bottom plate holes; and the problems that the construction measure cost is increased and the construction efficiency is low due to the fact that a temporary support installed at the bottom of an existing prefabricated concrete laminated slab is inconvenient to disassemble and reuse are solved.

The invention discloses a personnel lifting device used for a vertical arm of a bridge detection vehicle. The personnel lifting device comprises a motorized pulley, a steel wire rope, a guide device and a passenger device; the motorized pulley is fixed at the upper part of the vertical arm through a support; the steel wire rope is intertwined on the motorized roller; one end of the steel wire rope is fixed with the motorized roller and the other end the steel wire rope is fixed with the top part of the passenger device; the guide device and the passenger device are both installed in the vertical arm, and the passenger device reciprocates along the guide device. The personnel lifting device used for the vertical arm of the bridge detection vehicle provided by the invention solves the problem that the lifting of personnel and heavy objects is difficult during the use of the bridge detection vehicle, and is beneficial to the promotion and development of the bridge detection vehicle; in the scheme, the passenger device can rotate synchronously along with an operating room and a telescopic arm, so that a worker can always face a two-revolution control panel, and the rotation of the passenger device will not cause the steel wire rope to be twisted, thus, the passenger device has wide practicability. The device is simple in structure, scientific and reasonable, safe and stable and high in reliability.

The invention relates to the technical field of booster stations, and particularly relates to an arrangement scheme of an offshore booster station. The arrangement scheme comprises a platform, a first module, a second module, a third module, a fourth module and a fifth module, wherein the first module, the second module, the third module, the fourth module and the fifth module are arranged on the platform; the platform comprises a first layer and a second layer; the first module comprises a first power distribution assembly, a main transformer and a reactance device; the second module comprises a control assembly; the third module comprises fire fighting equipment; the fourth module comprises emergency equipment and heating and ventilation equipment; the fifth module comprises a second power distribution assembly used for daily power utilization; the first module, the second module and the third module are installed on the first layer; the fourth module and the fifth module are installed on the second layer and located above the second module and the third module; the position, where the first module is installed, of the first layer communicates with a third layer; and the vertical space needed by the booster station is saved, then the overall weight is reduced, the requirement for needed floating crane equipment is lowered, and therefore the building difficulty of the overall weight of the offshore booster station is lowered.

A rail car for superconducting A direct current limiter disclosed in the invention comprises a car body, and an inner side supporting frame and an outer side supporting frame are arranged at the two ends of the surface of the car body; wheels are arranged at the bottom of the car body; the outer side supporting frame is fixedly connected with the car body through a bolt a; the invention further discloses a method for disassembling and assembling a superconducting direct current limiter by using the rail car. According to the rail car, the inner side supporting frame and the outer side supporting frame are used for supporting the inner side flange and the outer side flange correspondingly in the disassembling and assembling processes, integrated installation of the low-temperature dewar ofthe large superconducting direct-current current limiter is conveniently achieved, and meanwhile maintenance and replacement of internal components of the superconducting direct-current current limiter in the later period are facilitated; the technical problems of difficult disassembly, difficult hoisting, inconvenient maintenance and the like in the system integration assembly and maintenance test process of the large-scale superconducting direct current limiter are solved, the structure is simple, and the operation is convenient.