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44results about How to "Smooth overhaul" patented technology

CT (Current Transformer) secondary circuit intelligent-detection method

The invention discloses a CT (Current Transformer) secondary circuit intelligent-detection method. The method comprises the following steps: 1) completing system initialization of a CT secondary circuit intelligent detector; 2) utilizing the CT secondary circuit intelligent detector to collect the phasor, the amplitude and the phase angle of current and voltage of a three-phase supply; 3) judging whether the phase current amplitude of one phase is zero or not; if yes, carrying out phase-zero phase-inversion judgment, namely judging which phase is inversed with a zero phase, and outputting corresponding results; and if not, entering a step 4); 4) judging whether the current amplitudes of two phases are same and meanwhile the amplitude of another phase is not zero; if not, entering a step 5); and if yes, carrying out phase-phase phase-inversion and polarity antiphase judgment, and then entering a step 7); 5) judging whether an inclined angle of two phases is less than 40 degrees and whether the amplitudes of two faulted phases are same; if yes, carrying out two-phase short-circuit judgment, judging which two phases are in short circuit, and then entering the step 7); and if not, entering a step 6); 6) judging whether the amplitudes of two non-faulted phases are same and the angles of amplitude are not same; if yes, carrying out single-phase grounding judgment, and then entering the step 7); if not, entering the step 7); and 7) displaying the judgment result and the power direction, and ending the detection.
Owner:STATE GRID CORP OF CHINA +1

Maintenance method for frame roller of roughing mill

The invention discloses a maintenance method for a frame roller of a roughing mill, which uses a roughing mill frame roller maintenance fixture which comprises a push-pull trolley, a roller replacing hook, a roller replacing rail mechanism, a transverse moving trolley, a lifting device and the like. The maintenance method includes: integrally demounting the frame roller before lifting, erecting arail of the roller replacing rail mechanism below a frame roller mounting position, pushing the transverse moving trolley right below the frame roller, descending the frame roller on the transverse moving trolley, pulling out the frame roller along the roller replacing rail mechanism to a position above the transverse moving trolley, and using the lifting device for lifting before rotating at a certain angle, so that the push-pull trolley can be pulled out of a roughing mill gateway for maintenance and replacement. Using the maintenance method can realize demounting and lifting of the roughing mill frame roller, enable the demounting and lifting process to be convenient and quick, increase maintenance speed and reduce labor intensity. Therefore, continuity, high efficiency, stability and smoothness of hot rolling production can be guaranteed, high efficiency, orderliness and high quality of maintenance can be guaranteed, and online maintenance time for the frame roller is shortened.
Owner:CHONGQING IRON & STEEL CO LTD

Disassembly and assembly device

InactiveCN111451979AMeet the needs of different structuresAvoid the problem of extrusion deformation that brings difficulties to maintenanceLifting framesWork benchesStructural engineeringMechanical engineering
The invention provides a disassembly and assembly device. The disassembly and assembly device comprises a first disassembly and assembly assembly, the first disassembly and assembly assembly comprisesa first supporting table, a first support, a first lifting device, and a second lifting device, the first support is mounted below the first supporting table, the first lifting device is connected with the first supporting table and the first support, and is configured to adjust the distance between the first supporting table and the first support, the second lifting device is mounted on one ofthe first supporting table and the first support, is located between the first supporting table and the first support and is configured to be suitable for being in abut joint with the other one in thefirst supporting table and the first support, the first lifting device is mounted on the edge of the first supporting table, the second lifting device is mounted in the middle of the first supportingtable or is configured to be suitable for being in abut joint with the middle of the first supporting table, according to the disassembly and assembly device, through the second lifting device, supporting of the middle of the first supporting table is achieved, and the first supporting table is uniform in stress and is not prone to deforming under the stress condition.
Owner:CHINA RAILWAY CONSTR HEAVY IND

Combined support for electrical equipment maintenance

The invention belongs to the technical field of electric power overhaul, and particularly relates to a combined support for electric power equipment overhaul. The combined support comprises a base, a rotating mechanism, two groups of lifting mechanisms, an overhaul platform, an operation table, a telescopic ladder stand and a controller; first supporting legs are arranged below the base, and first rollers are arranged at the bottoms of the first supporting legs. the operation table comprises a support, an operation groove formed in the center of the support, fixing blocks arranged at the two ends of the support, a rotating shaft rotationally connected to the fixing blocks, a clamping plate rotationally connected to the tail end of the rotating shaft, a supporting plate arranged at the lower end of the clamping plate and a plurality of second rolling wheels arranged below the supporting plate, and the rotating shaft penetrates through the clamping plate; and limiting pieces are arranged on the rotating shaft and located on the two sides of the clamping plate. According to the combined support, electrical equipment of different sizes can be stably fixed, maintenance is convenient, any height adjustment and angle adjustment are achieved, meanwhile, operators can conveniently get on and off the support at any time, maintenance tools can be conveniently transferred at any time, and the working efficiency of the maintenance operators is greatly improved.
Owner:国网河南省电力公司方城县供电公司

Internal structure of maglev vacuum pipeline

The invention discloses an internal structure of a maglev vacuum pipeline. A through under-rail structure is arranged at the inner bottom of the pipeline body structure in the length direction of thepipeline body structure, an inter-rail channel and maglev rails located on the two sides of the inter-rail channel are arranged at the top of the under-rail structure, an ultra-high-speed maglev traincan run on the maglev rails in a two-way mode, and the operation space of the maglev rails is a vacuum environment. The inter-rail channel is of a closed structure and is arranged in a penetrating mode along the pipeline body structure, the upper portion of the inter-rail channel is provided with a platform safety space meeting the train driving requirement, the inter-rail channel can enter the inter-rail channel through the inter-rail channel stairs and the inter-rail channel doors to the top face of the under-rail structure, and the inter-rail channel side wall doors are arranged on the twoside walls of the inter-rail channel according to requirements. Space requirements of a train form, evacuation or maintenance and equipment arrangement are comprehensively planned through the internal structure of the pipeline, the section space of the pipeline is effectively utilized, the pipeline is suitable for a single-pipe double-line form, compared with a double-pipe single-line form, the construction cost is reduced, the evacuation and maintenance functions are perfected, and the equipment space is reasonably configured.
Owner:CHINA RAILWAY DESIGN GRP CO LTD

Combined low voltage control switchgear

A combined low-voltage control switchgear belongs to the technical field of low-voltage control switchgear, and in particular relates to a combined low-voltage control switchgear. The invention provides a combined low-voltage control switch cabinet with safe use, convenient operation and convenient maintenance. The present invention adopts the following technical scheme. The present invention includes a cabinet body. The upper end of the cabinet body is the main busbar room, the front part of the cabinet body is the switch room, the side part of the cabinet body is the cable room, and the rear part of the cabinet body is the auxiliary busbar room. The vertical auxiliary busbars in the busbar room are connected to the horizontal main busbars in the main busbar room; the switch room includes multiple switch chambers arranged vertically, each switch chamber includes a fixed bracket box, and the front side of the fixed bracket box is a movable The fixed bracket box is fixed with a vertical busbar with a plug at the front end, the vertical busbar is connected to the auxiliary busbar, and the plug corresponding to the vertical busbar on the movable bracket box is provided with a plug chuck. The clip is connected to the input terminal of the circuit breaker through the inner drain bar.
Owner:沈阳天维电气设备制造有限公司

Running driving mechanism of power line inspection and maintenance unmanned aerial vehicle

The invention discloses a running driving mechanism of a power line inspection and maintenance unmanned aerial vehicle. A multi-rotor wing unmanned aerial vehicle (1) is adopted, a cable hook (3) is arranged on the multi-rotor wing unmanned aerial vehicle (1), and the multi-rotor wing unmanned aerial vehicle (1) is hung on a power line (2) by the cable hook (3) in a maintenance state of the power line (2) by the multi-rotor wing unmanned aerial vehicle (1). With the adoption of the abovementioned technical scheme, the running driving mechanism can stay on the power line for a long time, electric energy is saved, maintenance, fault removal and frost and freeze removal can be stably performed on the power line, and a potential risk of the power line is eliminated.
Owner:安徽翼讯飞行安全技术有限公司

Tool and equipment for disassembling and assembling tuyere medium sleeve of iron-making blast furnace

The invention discloses a tool and equipment for disassembling and assembling a tuyere medium sleeve of an iron-making blast furnace. The tool comprises a driving device and a grabbing device connected with the driving device. Under the driving action of the driving device, the grabbing device is provided with a locking position opened to clamp the inner wall of the tuyere medium sleeve and an unlocking position contracted to release the tuyere medium sleeve. The end, away from the driving device, of the grabbing device is provided with a first stop piece capable of being clamped with a first opening edge of the tuyere medium sleeve, and the other end, close to the driving device, of the grabbing device is provided with a second stop piece capable of being clamped with a second opening edge of the tuyere medium sleeve. The grabbing device is further provided with a supporting piece, and the supporting piece can abut against the inner wall of the tuyere medium sleeve when the supporting piece is located at the locking position so that the tuyere medium sleeve can be prevented from shaking in the moving process. The clamping and fixing effect on the tuyere medium sleeve is better, so that the potential safety hazard that the tuyere medium sleeve falls off from the grabbing device is reduced.
Owner:济南华北升降平台制造有限公司

Marine frequency converter hoisting tool

The invention discloses a marine frequency converter hoisting tool. The marine frequency converter hoisting tool comprises main components including a base, a bearing support, a driving mechanism, movable wheels and the like. The movable wheels are arranged at the bottom of the base. The bearing support is longitudinally fixed to the base, and a pulley block is mounted at the top of the bearing support. The driving mechanism is mounted on the bearing support, and the leading-out end of the driving mechanism is connected with a frequency converter to be hoisted downwards through the pulley block. A through hole is formed in the bearing support in a penetrating manner, and the direction of the through hole is consistent with the line connecting direction of the pulley block. A cavity is formed in the bearing support at the bottom of the through hole, and a rotary disc mechanism is longitudinally mounted in the cavity. A limiting beam is movably and telescopically arranged in the throughhole, and the upper end of the rotary disc mechanism protrudes into the through hole and is in linkage with the limiting beam. The front end of the limiting beam abuts against the frequency converter.The marine frequency converter hoisting tool solves the technical problem a proper hoisting tool is in lack when a large frequency converter of an existing ship is repaired is solved.
Owner:POLAR RES INST OF CHINA

Special hoisting tool for overhauling

The invention discloses a special hoisting tool for overhauling. The hoisting tool comprises a hoisting arm and a suspension arm, the hoisting arm and the suspension arm are arranged in parallel, a connecting arm is fixedly arranged between the hoisting arm and the suspension arm and is perpendicular to the hoisting arm and the suspension arm, a lifting diagonal draw bar is fixedly arranged between the lifting arm and the connecting arm, a suspension diagonal draw bar is fixedly arranged between the suspension arm and the connecting arm, a plurality of hoisting holes are formed in the end part, far away from the connecting arm, of the hoisting arm, hoisting rings are connected to the hoisting holes, and a suspension ring is connected and fixed to the bottom surface of the end part, away from the connecting arm, of the suspension arm. Compared with the prior art, the hoisting tool has the advantages of being simple in structure, convenient to use, capable of facilitating space shielding operation, time-saving and labor-saving; electric machinery can be stably hoisted, a hoisting point capable of adjusting the gravity center is designed at the upper part, the arm of force is adjusted, so that the purpose of smooth overhauling is achieved, the manual hoisting time is saved, and the working efficiency is greatly improved; and the practicability and the market popularization value are very high.
Owner:华能新华发电有限责任公司

104 distribution valve air pressure monitoring module

The invention discloses an air pressure monitoring module for a 104 distribution valve. The module comprises an air path plate installed between a main valve part and a middle body of the 104 distribution valve. A first main air hole, a second main air hole and a third main air hole formed in the main valve part are communicated with a first auxiliary air hole, a second auxiliary air hole and a third auxiliary air hole of the middle body through a first connecting hole, a second connecting hole and a third connecting hole formed in the air path plate respectively. A first detection channel communicated with the first connecting hole, a second detection channel communicated with the second connecting hole and a third detection channel communicated with the third connecting hole are arranged in the air path plate. The air pressure monitoring module for the 104 distribution valve is simple and compact in structure and can be additionally installed between the main valve part and the middle body of the 104 distribution valve directly to lead out an air path connecting a train pipe, a braking cylinder and an auxiliary air cylinder of a railway vehicle for air pressure detection; an original braking pipeline of the railway vehicle does not need to be refitted, so that the workload is small; the module can be additionally installed on the existing railway vehicle directly, so that compatibility is high; the number of connecting portions is small, so that sealing is convenient, and the hidden danger of leakage is small.
Owner:CRRC QINGDAO SIFANG ROLLING STOCK RES INST

Rack roller overhauling fixture for rough mill

The invention discloses a rack roller overhauling fixture for a rough mill. The rack roller overhauling fixture comprises a trolley, a roller replacement hook, a roller replacement rail mechanism, a translational trolley, a lifting device and the like. When the fixture is used for overhauling, a rack roller is wholly disassembled and lifted; a rail of the roller replacement rail mechanism is erected below a rack roller mounting position; the translational trolley is pushed to a position right under the rack roller; the rack roller is lowered onto the translational trolley, is pulled out to a position above the translational trolley along the roller replacement rail mechanism, and then rotates a certain angle after being lifted by the lifting device; and the trolley can be pulled out of a mill house by a roller replacement trolley of the rough mill for overhauling and replacement. The rack roller of the rough mill can be disassembled and listed, and the disassembly and lifting processes are convenient and fast; and the rack roller is disassembled and conveyed to the outside for overhauling, so that overhauling speed is increased, and labor intensity is reduced. Therefore, by the fixture, the continuity, high efficiency, stability and direct motion of hot rolling production can be ensured; the high efficiency, sequence and high quality of the overhauling are ensured; and the online overhauling time of the rack roller is shortened.
Owner:CHONGQING IRON & STEEL CO LTD

Sliding type direct-current energy dissipation device unit fixing device and using method

A sliding type direct-current energy dissipation device unit fixing device comprises a main body; the main body is fixedly connected to an energy dissipation device frame; at least one set of sliding rail beams are fixed to the upper side of the main body; and a direct-current energy dissipation device unit is arranged above the sliding rail beams in a sliding mode so as to slide to a preset position above the sliding rail beams to be installed. A rear fixing plate is arranged at one end of each sliding rail beam, and the rear fixing plates are connected to the energy dissipation device frame, matched with the direct-current energy dissipation device unit and used for playing a role in guiding and positioning when the direct-current energy dissipation device unit is installed. According to the sliding type direct-current energy dissipation device unit fixing device, the purpose of flexible installation, overhaul and replacement of the direct-current energy dissipation device unit is achieved, the device is simple in structure, convenient to assemble, detachable, easy to operate and store, safe and reliable, and various operations such as installation, overhaul and replacement of the direct-current energy dissipation device unit can be completed rapidly, safely and stably.
Owner:BEIJING POWER EQUIP GRP
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