60results about How to "Improve maintenance safety" patented technology

The invention relates to a pebble-bed module type high-temperature gas cooled reactor fuel loading and unloading system which comprises a reactor (10), a reactor core fuel circulating system (20), a new fuel loading system (300) and a spent fuel unloading system (400). The reactor (10) comprises a reactor pressure container (11), a graphite coating reactor internal component (12), a central reactor core cylinder (13), a metal reactor internal component (15) and an unloading pipe (14), the reactor core fuel circulating system (20) comprises a reactor core unloading system (100) and a reactor core loading system (200) and further comprises a helium pneumatic conveying system (500), a compressed air pneumatic conveying system (600), a vacuum pumping system (700) and a helium supplying and recycling system (800), and the compressed air pneumatic conveying system (600), the vacuum pumping system (700) and the helium supplying and recycling system (800) are all connected with the helium pneumatic conveying system (500). The helium pneumatic conveying system (500) is further respectively connected with the reactor (10), the reactor core fuel circulating system (20), the new fuel loading system (300) and the spent fuel unloading system (400).

The invention relates to an open winding motor system and a drive circuit and belongs to the technical field of opening winding motor control. Redundant bridge arms and redundant inductors are set inthe drive circuit. When an open circuit fault occurs in certain phase of winding or certain bridge arm, the fault winding or bridge arm stops working, the redundant inductors and the redundant bridgearms are put into operation, and fault-tolerant control is realized. Even under fault condition, a connection method of motor windings is not limited, and a switching drive signal originally sent to the fault bridge arm is forwarded to the redundant bridge arms, so the control is simple, secure and reliable. Even if the fault occurs in certain phase, the circuit still can be operated normally, normal drive is realized, and reliability of an inverter circuit is improved.

The invention provides an energy storage system, and the energy storage system comprises at least one energy storage unit cluster and a centralized monitoring system of the energy storage unit cluster, wherein the energy storage unit cluster is formed by connecting at least two energy storage modules in series; one energy storage module comprises an energy storage element group and a switch bridge arm, the switch bridge arm is composed of a master control switch and a bypass switch, one end of the master control switch is connected with the energy storage element group, the other end of the master control switch serves as a first input/output end of the energy storage module, one end of the bypass switch is connected with the first input/output end, and the other end of the bypass switch is connected with the second input/output end of the energy storage module; the energy storage unit cluster is coupled to the direct current bus through the DC/DC converter; and the centralized monitoring system is connected with the energy storage unit cluster through a control bus and is used for controlling the on or off of the main control switch and the bypass switch in any energy storage module in the energy storage unit cluster. According to the invention, the management flexibility of the energy storage system can be improved, the stability of the energy storage system is improved, and the applicability is higher.

The invention discloses a utility tunnel, and belongs to the field of municipal infrastructure construction. The utility tunnel comprises a tunnel body which is internally provided with a partition plate, and the lower surface of the partition plate and the tunnel body form a sewage disposal area. The utility tunnel is characterized in that the partition plate is provided with a water treatment device and a water storage box; the water treatment device comprises a silt separator and a water treatment machine; the silt separator is connected with the water treatment machine through a first clear water pipe; the water treatment machine is connected with the water storage box through a second clear water pipe; a water outlet pipe penetrating out of the tunnel body is connected to the water storage box; the tunnel body is further internally provided with a protection box; the water treatment machine is located in the protection box; a shockproof base is arranged on the partition plate and provided with a groove body; a foam plate is embedded in the groove body; and the protection box is fixed to the foam plate. According to the utility tunnel, the inner space of the tunnel body is reasonably utilized, all the components are reasonably laid out, the water treatment machine is stable in operation and good in shockproof performance, and good converting of sewage and rainwater can be effectively ensured.

A high-voltage device box comprises a box body, and a high-voltage grounding switch, a voltage transformer, a lightning arrester, a high-voltage isolation switch and a vacuum circuit breaker which arelocated in the box body. The interior of the box body is divided into a low-voltage area and a high-voltage area through a partition plate, the low-voltage part of the high-voltage isolation switch and the low-voltage part of the vacuum circuit breaker are both installed in the low-voltage area, and the high-voltage grounding switch and the high-voltage part of the vacuum circuit breaker are bothinstalled at the side, located in the high-voltage area, of the partition plate. The high-voltage part of the high-voltage isolation switch is installed on the bottom face of the high-voltage area through a supporting insulator, and the voltage transformer and the lightning arrester are installed on the two opposite side walls of the high-voltage area respectively. An overhaul cover plate is arranged at the upper portion of the low-voltage area, and a main top cover is arranged at the upper portion of the high-voltage area. According to the high-voltage device box, the maintenance of the high-voltage device is facilitated after the high-voltage and low-voltage partitioning, and the high-voltage device adopts a mode of combining the side wall installation and the bottom surface installation, so that the overall size of the high-voltage device box can be reduced.

The invention relates to a 5G communication iron tower with high maintenance safety. The 5G communication iron tower comprises a supporting rod, a supporting disc, an antenna and a ladder stand. The supporting rod is vertically arranged, and the supporting disc and the supporting rod are coaxially arranged. The diameter of the supporting disc is larger than that of the supporting rod, and the supporting disc is fixed to the top end of the supporting rod. The antenna is arranged at the top of the supporting disc and right faces the supporting rod. A manhole is formed in the supporting disc, andthe axis of the manhole is parallel to the supporting rod. A protection mechanism and a snow removing mechanism are arranged on the supporting disc, the protection mechanism comprises protection pipes, a sealing assembly and at least two movable assemblies, and the snow removing mechanism comprises at least two snow removing assemblies. The snow removing assemblies are arranged in the protection pipes and are in one-to-one correspondence with the movable assemblies. The 5G communication iron tower with high maintenance safety achieves the function of improving the maintenance safety throughthe protection mechanism, and not only that, the function of removing snow is achieved through the snow removing mechanisms.

The invention discloses an adjustable electric insulation ladder, and belongs to the field of insulation ladders. The adjustable electric insulation ladder comprises a box body, a lifting rod and a supporting rod, a supporting plate is fixedly connected to the box body, the lifting rod is rotatably connected to the supporting plate, a supporting table is fixedly connected to the lifting rod, and arotating rod, a connecting rod and a hydraulic rod are rotatably connected to the box body. The rotating rod, the connecting rod and the hydraulic rod are fixedly connected to the supporting rod, thesupporting rod is fixedly connected with a base, a driving mechanism is fixedly connected into the box body, and the driving mechanism is connected with the lifting rod and the hydraulic rod. The adjustable electric insulation ladder is simple to use, the height of the adjustable electric insulation ladder is adjusted by arranging a lifting mechanism, the convenience of maintenance height is improved, the maintenance efficiency is improved, meanwhile, the supporting effect of the adjustable electric insulation ladder is enhanced, the stability of an insulating frame is further improved, and the maintenance safety is improved.

The invention discloses a novel electric power overhaul warning device which comprises a warning device, a ground joint, a locking block, a power box, a hinge, a base, a lockset, an inspection window,a box door, an upper cover, a flashing, a lightning rod, a rubber tube and a junction box, wherein the right end of the ground joint is welded with the left end of the warning device; a through holeis formed in the middle end of the locking block; the rear end of the locking block is fixedly connected with the bottom of the front end of the warning device; the bottom of the upper cover is weldedwith the top of the power box; the power box is of a hollow cuboid structure. According to the novel electric power overhaul warning device disclosed by the invention, the warning device is arrangedon the structure, the device is capable of realizing physical pressure alarm and voltage alarm, and when external impact force pressure is too large, parts inside the power box is likely to shift to cause potential safety hazards, and then the warning device gives warning in time; meanwhile, if the power box has electric leakage, the warning device is capable of alarming in time, and the maintenance safety of a maintainer is greatly improved.

The invention belongs to the aviation storage battery information acquisition field and relates to an aviation storage battery cell information acquisition apparatus. In order to ensure the maintenance quality of a storage battery, the voltage and temperature of the cells of the storage battery should be periodically monitored and recorded in a maintenance process. At present, two data acquisitionmethods are adopted, one method accomplishes recording by means manual measurement, and the other method adopts a lantern ring type acquisition probe, the latter is inconvenient to use, and acquiredinformation is undiversified, and short circuits and fires can be easily caused by collision and friction between lantern rings. The lower part of the universal and convenient-to-use aviation storagebattery cell information acquisition device provided by the invention is a worktable, and the upper part of the device is a cover plate which can be moved up and down; a storage battery slide rail isarranged on the worktable; and a plurality of probes corresponding to each cell of the storage battery and an information acquisition output end are distributed on the cover plate. With the aviation storage battery cell information acquisition apparatus of the invention adopted, the workload of maintenance personnel can be decreased, and storage battery information acquisition efficiency and safety can be improved.

The invention relates to a deep screening and crushing process of a raw coal system, and relates to the technical field of coal mining equipment. Raw coal, a screening system and a crushing system are involved in the deep screening and crushing process, the raw coal is connected with the screening system through lifting equipment, the screening system is connected with the crushing system through a large-dip-angle belt conveyor, the screening system comprises a double-layer flip-flow screen. and the crushing system comprises a double-geared roller crusher and a cone crusher. The deep screening and crushing process of the raw coal system is transformed by means of a raw coal deep screening and crushing system, the production process can be perfected, the raw coal transportation capacity is improved, the adopted cone crusher can flexibly adjust the discharging granularity, and the problem of large slime water treatment pressure caused by excessive crushing is solved; and the washed raw coal is deeply screened and crushed, and the reasonable washing granularity can be determined according to the property of the washed raw coal in production practice, so that the clean coal yield is further improved, and the economic benefit is improved.

The invention belongs to coal mine winch dispatching equipment, particularly discloses a dispatching winch system, and solves the problems that counterweight dispatching winch equipment is difficult to maintain, danger coefficient of an operator performing overhead working is high, the time for the operation process is long and the steel wire rope tension is insufficient. The dispatching winch system comprises a dispatching winch and a tractor, wherein the dispatching winch is connected with the tractor through a steel wire rope II; a drum of the dispatching winch is wound with the steel wire rope II; two ends of the steel wire rope II bypass a plurality of guide pulleys respectively to be connected with an advancing end and a retreating end of the tractor; the dispatching winch system further comprises a civil foundation and hydraulic control systems fixed on the civil foundation; and the two sets of hydraulic control systems are connected with the steel wire rope II located on two sides of the dispatching winch respectively. The dispatching winch system is high in automation degree, complete in intelligent protection, simple to operate and safe and stable in operation and does not have high requirements for the operating environment.