49results about How to "Reduce operational accidents" patented technology

The invention discloses a diagnosis method for the insulation defect of a switchgear. The method comprises that a mode of an air discharge decomposition product in the switchgear is established; the association feature between the air discharge decomposition product and the insulation defect in the switchgear is established; and according to the association feature, the type of the insulation defect in the switchgear is determined. According to the method provided by the invention, the type, content and change trend of gas component in the switchgear are detected to determine the insulation defect in the switchgear, so that defects in the switchgear can be discovered timely, effective measures can be taken to avoid further development of the defect, and operation accidents of the switchgear can be reduced.

The invention relates to a reducer capable of regulating return difference. The reducer comprises an outer shell, a compound planet gear, an input shaft and output shaft, wherein a first gear I of the compound planet gear is meshed with the fixed gear ring of the outer shell, and a second gear II thereof is meshed with the gear of the output shaft; the input shaft and the output shaft are in the same straight line, the eccentric shaft neck of the input shaft is provided with taper, and an eccentric sleeve is arranged between the eccentric shaft neck of the input shaft and the bearing of the compound planet gear; the eccentric sleeve is provided with a tapered hole, and the front end of the eccentric sleeve is provided with an elastic hanger; the eccentric shaft neck of the input shaft is tightly matched with the tapered hole of the eccentric sleeve; the centre hole of the output shaft is internally provided with an adjusting screw rod, a screwed hole at the large end of the adjusting screw rod is connected with an external thread at the other end of the input shaft; and the elastic hanger of the eccentric sleeve is inserted into a hanger groove at the larger end of the adjusting screw rod, and the larger end of the adjusting screw rod is connected with the output shaft through a bearing. The invention can carry out adjustment to enable the gear return difference to restore to an expected value, has simple, convenient and feasible adjustment, reduced gear manufacturing cost and prolonged service life. The second embodiment of the invention can realize automatically regulating return difference.

This invention relates to an artificial bistable quick overturn unit including a shell and a drive shaft movably plugged in the shell, in which, a fork block is set on the shaft and is connected with an artificial fork, a baffle plate is set in the shell vertical to the shaft and separates the shell into a permanent magnetic cavity and a spring cavity, a magnet is fixed on the internal wall of the magnet cavity, a core is mounted on the shaft in the magnet cavity, the fork block can be slidedly bushed on the shaft of the spring cavity, two spring seats are bushed on the shaft of both sides of the block, two push boards are fixed on the shaft of outsides of the spring seat and a spring is set between the seat and the push board.

The present invention provides an excitation power synchronization signal collection and processing method and apparatus. The method comprises the steps of collecting a synchronization voltage signal and a generator PT signal simultaneously; determining phase sequences, frequencies and phase values of the synchronization voltage signal and the generator PT signal according to the synchronization voltage signal and the generator PT signal; and determining an excitation power synchronization signal reference source according to the phase sequences, frequencies and phase values of the synchronization voltage signal and the generator PT signal. Through adoption of the method and apparatus, redundant intelligence of a synchronization signal of rectification of the controllable silicon rectification bridge is realized, the fault tolerance rate is higher, and related running accidents of the excitation system and the generator caused by synchronization loop sampling abnormality are reduced.

The invention discloses a two-phase flow integrated quartz resistance furnace, which comprises a round metal cylinder body which is arranged on a rotating shaft and can rotate 180 degrees, an graphite electrode is longitudinally arranged in the round metal cylinder body, the two ends of the graphite electrode are connected with composite electrodes arranged at the two ends of the round metal cylinder body through graphite electrode sleeves, the composite electrodes are connected with a low voltage side of a furnace front transformer through cables, the peripheries of the composite electrodes are provided with furnace cover cooling water drums, the periphery of the graphite electrode is provided with water cooled jackets, the composite electrodes and the outer rings of the water cooled jackets are fixed, the cables are water cooled cables, the water cooled cables comprise copper core wires, rubber steam hoses are coated outside the copper core wires, cooling water channels are arrangedbetween the copper core wires and the rubber steam hoses, transition joints are arranged between the water cooled cables and the composite electrodes, and two-phase flow conduits of the transition joints are connected with the water cooled jackets. The two-phase flow integrated quartz resistance furnace reduces areas of the cables by more than 20 times, greatly reduces contact resistance between the electrodes at the two ends, reduces turning weight of a furnace body, greatly reduces operating accidents of equipment, and increases operating efficiency.

An automatic control system for operation and protection of an electrodialysis system comprises an electrodialysis unit, a dosing unit and an automatic control unit. The electrodialysis unit comprisesan electrodialysis membrane stack, a fresh water storage tank, a concentrated water storage tank and an electrode water storage tank, wherein a fresh water chamber circulating pipeline, a concentrated chamber circulating pipeline and an electrode chamber circulating pipeline are formed. The dosing unit comprises an acid dosing unit and a reducing agent dosing unit. The automatic control unit comprises a PLC module and a human-machine interface HMI. The system composition is optimized, each sensor monitors material water inlet indexes such as turbidity, ORP value, pH value, pressure, temperature and the like in real time, and a corresponding regulation and control mechanism is made, so that an electrodialysis membrane stack is prevented from being damaged or polluted; in addition, all thesensors cooperate with one another through a PLC, normal and automatic operation of the electrodialysis system is guaranteed, and operation accidents are reduced.

The invention discloses a driving safety protection device of an underground trackless auxiliary transport vehicle. A pneumatic control reversing valve is additionally arranged in a vehicle braking system, so that an actuating mechanism can be operated only when the vehicle is in a braking state, and the actuating mechanism does not act even if an operating button is touched accidentally in the driving process. Meanwhile, in order to prevent a driver from engaging a gear to drive the vehicle under the condition that the vehicle door is not closed, a corresponding protection device is additionally arranged in a gear engaging loop, and a door locking valve is triggered to act only after a cab door is closed, so that the gear engaging loop is controlled to take effect, and gear engaging driving is achieved. After the set of driving safety protection device is additionally arranged on the underground trackless auxiliary transport vehicle, the safety driving performance of the vehicle can be effectively improved. The driving safety protection device plays an important role in reducing vehicle operation accidents, and has positive significance in guaranteeing the personal safety of underground operating personnel.

The invention provides an adjustable flexible supporting roller for conveying belts. The supporting roller mainly comprises a roller hanging seat (1), friction rollers (3), a middle roller (4) and a connection chain shaft (18), wherein the connection chain shaft (18) can be a metal flexible chain, a metal rope or a nonmetal rope, or a flexible shaft formed by twisting the metal and the nonmetal rope; a middle roller shaft head (19) is adopted by the middle roller (4), and the middle roller (4) has a novel structure. By the supporting roller, shortcomings of the traditional supporting roller and the conventional flexible supporting roller are overcome, so that the belts can be uniformly conveyed by a roller body; the service life of the supporting roller is prolonged; waterproof and dustproof effects are achieved; and the supporting roller is simple in structure and convenient to maintain, and the cost is saved.

The non-linear controlling device is composed of the signal acquisition circuit, the data processing circuit, the pulse amplification circuit, the controllable silicon power circuit and the analog signal output circuit. The input end of the said signal acquisition circuit is connected to external transmitter and its output end of connected to the input end of the data processing circuit. The output end of the data processing circuit is connected to the pulse amplification circuit and the analog signal output circuit. The output end of the pulse amplification circuit is connected to the controllable silicon powder circuit. The output end of the controllable silicon powder circuit is connected to the controllable silicon power circuit. The output end of the controllable silicon power circuit is connected to the controllable silicon power circuit.

The invention discloses a skid-mounted transformer device, which comprises a skid body, wherein the skid body is divided into a transformer chamber and a security control chamber by a partition plate,a transformer body is arranged in the transformer chamber, an oil collecting pool is arranged at the lower end of the transformer body, a bus system and a transformer radiator are further connected to the transformer body, the bus system extends out of the skid body to be connected with an external wire, and the transformer radiator extends out of the skid body through a pipeline; a control system and a gas fire extinguishing system are arranged in the security control chamber, a fire alarm system, an intelligent ventilation system, a heating system and a dehumidification system are further arranged in the skid body, and the transformer radiator, the gas fire extinguishing system, the fire alarm system, the intelligent ventilation system, the heating system and the dehumidification systemare all electrically connected with the control system. The device is suitable for various severe environments, the service life of a transformer substation is effectively protected, the precision and automation degree of temperature and humidity monitoring control are high, and various costs can be greatly reduced.

The invention relates to a transformer station back brake operation clip, in particular to an intelligent transformer station back brake operation clip and a use method thereof. The intelligent transformer station back brake operation clip comprises a box body, a single chip microcomputer, a power supply, a plurality of light bars, a start press button, a stop press button and a confirmation press button, wherein a positioning groove matched with the shape of an operation sheet is formed in the front end face of the box body; at least three clamping sheets capable of rotating and clamping the operating sheet in the positioning groove are arranged at the periphery of the positioning groove; and the start press button, the stop press button and the confirmation press button are arranged on the front end face of the box body. By implementation of the technical scheme, the intelligent transformer station back brake operation clip enables only one light bar to shine at any time to remind a user to write one operating step and implement the step, and the barrier gate actual operation is conducted strictly according to the written sequence; the occurrence probability of operation accidents caused by human factors is reduced, the writing integrity of the operating sheet is improved and the potential safety hazard is eliminated; during nighttime operation, the light bars shine to reduce the errors of misread, item-jumping operation caused by factors, such as dim light; and the working efficiency is improved.

The invention discloses a safety identification intelligent elevator which comprises a safety traction module and an opening and closing module. The safety traction module comprises a door frame, magnetic fasteners and a drafting part, a cavity is formed in the door frame, the magnetic fasteners are symmetrically arranged in the cavity, and the drafting part is installed in the cavity; and the opening and closing module comprises elevator doors, moving blocks and locking shafts, the elevator doors are symmetrically arranged on the door frame, vertical grooves are formed in the door frame, the vertical grooves are communicated with the cavity, the moving blocks are embedded in the vertical grooves, and the locking shafts are vertically fixed to the moving blocks and matched with the elevator doors. By means of the safety identification intelligent elevator, people or articles can be prevented from being pinched to cause elevator operation accidents when the elevator is forcibly closed during operation, and if the doors are forcibly closed, an anti-pinch structure can automatically and reversely operate to open the elevator doors, so that the elevator accidents are greatly reduced, people can escape from themselves when the elevator is trapped due to faults, and the survival rate is increased.

The invention discloses a rail train pantograph device capable of automatically adjusting pantograph-catenary contact pressure. The rail train pantograph device comprises a base, and a driving mechanism, a sliding mechanism and a lifting mechanism are arranged above the base; the contact pressure is adjusted in time through the driving mechanism, a maintainer does not need to climb on the roof of the rail train to manually measure and adjust the contact pressure between pantographs and catenaries after stopping, the labor cost is saved, the personal safety of the maintainer is protected, the complexity of measurement and adjustment is reduced, and the working efficiency is improved. It is guaranteed that the contact pressure between pantographs and catenaries in the running process of a train is always within a reasonable range, the situation of pantograph current collection faults caused by abnormal contact pressure due to the fact that a roadbed is not smooth, the catenaries change in height and the like in the running process is reduced, and abnormal abrasion of pantograph components caused by too large contact pressure in the running process is avoided; and the operation accidents of the pantograph catenary are reduced, the safety is high, and the applicability is high.

The invention relates to an automatic cloth leftover winding device comprising a winding mechanism, a turnover mechanism and a mounting base. The winding mechanism comprises a first bearing part and at least one set of winding parts. The winding parts comprise drive parts, transmission shafts, fixing bases, telescopic parts and second bearing parts; output shafts of the drive parts are provided with first synchronous wheels; the transmission shafts are fixedly sleeved with a plurality of second synchronous wheels; the second bearing parts are provided with driven wheels; at least one second synchronous wheel and the corresponding first synchronous wheel are connected through a first synchronous belt; the other second synchronous wheels are connected with the driven wheels through a secondsynchronous belt; swing arms are arranged at the two ends of the second bearing parts; the transmission shafts and the swing arms are hinged; the movable ends of the telescopic parts are connected with the swing arms or the second bearing parts; and the turnover mechanism is fixed to the mounting base and connected with the winding mechanism. The automatic cloth leftover winding device can achieveautomatic winding of cloth leftovers, manual operation is not needed, safety, high speed and high efficiency are achieved, and cost is saved.

The invention discloses an electric power circuit splicing sleeve correction tool. A screw rod is installed in a screw hole in a mounting seat, the upper ends of a right rear connection arm and a right front connection arm are installed on the right end of the mounting seat through hinges, and a left front connection arm and a left rear connection arm are installed on the left end of the mountingseat through hinges, and side connecting arm hinges are installed on both the middle of the right front connection arm and the middle of the left front connection arm, and the left end of a lower connection arm is fixed on a constant pressure seat and the right end of the lower connection arm is installed on the right rear connection arm through a hinge. A butterfly nut on the right side is mounted on a screw on the constant pressure seat and the butterfly nut supports against the right front connection arm. A dynamic pressure seat is mounted on the tail of the screw rod. The electric power circuit splicing sleeve correction tool can reduce mechanical damage to a splicing sleeve in a process of high-altitude correction on the wire splicing sleeve, can greatly improve construction quality and prolong the service life of the splicing sleeve, can reduce operation accident caused by the wire splicing sleeve, and can bring great economic benefits.