Disassembling and assembling tool and disassembling and assembling method for coupler in narrow space of large-scale submerged long-axis pump

Abstract

The invention discloses a disassembling and assembling tool and disassembling and assembling method for a coupler in a narrow space of a large-scale submerged long-axis pump, and belongs to the technical field of maintenance of submerged long-axis pumps. The disassembling and assembling tool comprises a supporting frame, a horizontal sliding rail, a cantilever crane assembly, a lifting platform and a sliding rail vertical plate, wherein the horizontal sliding rail and the cantilever crane assembly are arranged on the supporting frame, the lifting platform is slidably connected to the horizontal sliding rail, the sliding rail vertical plate is arranged at the end of the horizontal sliding rail, a fork-shaped limiting clamp is arranged at one end of the lifting platform, and a sliding rail and a sliding block are arranged on the upper side surface of the fork-shaped limiting clamp. According to the disassembling and assembling tool and disassembling and assembling method for the couplerin the narrow space of the large-scale submerged long-axis pump, the structure is novel, the installation is simple, the operation is convenient and fast, the installation efficiency and quality of the coupler can be greatly improved, and meanwhile, the work intensity of maintenance personnel is reduced.

Description

technical field [0001] The invention relates to the technical field of submerged long-axis pump maintenance, in particular to a tool for disassembling and assembling a shaft coupling in a small space of a large submerged long-axis pump. Background technique [0002] The shaft seal adopts the mechanical seal of the submerged long-shaft pump, which is widely used in the water system of thermal power and nuclear power plants. Its main function is to provide cooling water for the heat exchanger of the equipment cooling water system, and indirectly cool the adverse effects of various important equipment during the operation of the power plant. heat. [0003] The plant water pump is the key core equipment of the plant water system. Whether its function is normal or not directly affects the safe, economical and stable operation of the power plant. At present, the risk point that affects the safe operation of plant water pumps lies in the wear and tear of mechanical seals. Once the...

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Problems solved by technology

At present, the risk point that affects the safe operation of plant water pumps lies in the wear and tear of mechanical seals. Once the leakage of mechanical seals increases, plant water pumps will exit the operating mode. At this time, urgent repairs and replacement of mechanical seals are required, and the difficulty of mechanical seal replacement lies in small spaces. Realize the disassembly and assembly of the coupling

[0004] Through the comprehensive analysis of the inner space of the plant water pump motor support, the rigid coupling structure and the weight, the main factors restricting the hoisting of the main bolts of the shielded main pump are as follows: 1. The pump side coupling and the intermediate section are heavy: the pump side coupling The weight of the shaft is up to 75Kg, and the weight of the middle section of the coupling is up to 113Kg. Due to other factors, lifting tools cannot be used and can only be carried by members of the working group; The operation is limited, especially when carrying the heavy intermediate section, because the members of the working group cannot stand, the center of gravity is likely to be unstable, resulting in damage to personnel and equipment; 3. The radial clearance is small: the coupling on the pump side is matched with the shaft The surface is long, and the radial gap is small. When two people cooperate, the coupling is likely to tilt due to uneven force, resulting in the coupling and shaft jamming; 4. The axial distance is small: the motor side coupling The axial distance from the coupling on the pump side is limited, and it is difficult for personnel to place the intermediate section horizontally between the two in a narrow space. Repeated operations for a long time will easily cause fatigue of personnel

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