38results about How to "Eliminate operational hazards" patented technology

The invention provides a method for judging whether an abrasion of a bearing retainer of a locomotive traction motor fails or not. The method comprises the steps of S1, establishing a copper alloy retainer three-dimensional model through computer-aided design (CAD); S2, correcting the calculated weight of the three-dimensional model in the CAD to be equal to the actual weight; S3, according to a selected bearing model, setting the unilateral maximum permissible abrasion depth of an arc surface of a pocket of the copper alloy retainer, and obtaining the maximum mass m1 of the copper alloy retainer, which is abraded, through the CAD; S4, calculating the mass mCu of Cu elements in the maximum mass m1; S5, calculating the maximum content ppm(Cu)(max) of the Cu elements in lubricating oil; and S6, measuring a ppm value ppm(Cu)' of the Cu elements contained in the lubricating oil to be monitored in a locomotive, and comparing the ppm(Cu)' with the ppm(Cu)(max), wherein if the ppm(Cu)' >= the ppm(Cu)(max), the abrasion of the retainer fails and can not be used any longer, and if the ppm(Cu)' < the ppm(Cu)(max), the abrasion of the retainer does not fail. By the aid of the judging method, a scientific and reliable judgment foundation is provided to monitor whether the abrasion of the retainer fails or not, so that erroneous judgments are reduced.

The invention relates to a robot for disassembling and assembling high-temperature connecting pipes, comprising a support mechanism (12) and a base mechanism (13). The support mechanism (12) is arranged on the upper part of the base mechanism (13), and A plurality of movable stations are set, and mechanical claws (14) or mechanical hammers (30) are respectively arranged on the plurality of movable stations, and the plurality of mechanical claws (14) are positioned and grasp each disassembled part of the high-temperature connecting pipe respectively. Assemble and disassemble the parts of the high-temperature connecting pipe through the space movement of the mechanical claw; the mechanical cone (30) includes an arc-shaped guide rail (22) and is arranged on the arc-shaped guide rail (22). The cone head (26), the cone head (26) slides along the arc-shaped guide rail (22) to realize hitting the high-temperature connecting pipe in different radial directions. The application not only automatically knocks and removes the condensed ice slag on the pipeline before disassembling and assembling the connecting pipe, but also can realize the fully mechanized operation of disassembling and assembling the high-temperature pipeline.

The invention relates to a digital protection tester with a fault data model base for protection testing, comprising an ARM (Advanced RISC Machines) processor, a DSP (digital signal processor), 8 inputs and 4 outputs, a FT3 plate, and a GPS (global positioning system) interface, wherein the ARM processor is connected with a host computer through an Ethernet interface, and are respectively connected three optical interfaces (A,B, C) to output data messages to a digital protection device to be tested through the Ethernet; the DSP is connected with the ARM processor through an HPI (hardware platform interface); the 8 input paths and 4 output paths are hung an external parallel I / O bus of the DSP; the FT3 plate is hung on the external parallel I / O bus of the DSP; the FT3 plate on an FPGA (Field Programmable Gate Array) has 12 weak signal output terminals and 3 groups of message output terminals and optical B-code interfaces meeting the standard of IEC60044-8; and the GPS interface is connected with the ARM processor; and the digital protection tester also has an abnormal data restoration and reproduction device. The digital protection tester can determine the effectiveness of the malfunction prevention measures of the digital protection device according to the fault data model base, thereby perfecting the performance of the digital protection device.

The invention belongs to the technical field of automatic control of thermal generator sets, and particularly relates to a checking method for preventing failure of a thermal process protection system of a thermal generator set. The thermal process protection system comprises the following elements: design of the logic of a main protection system of the set, design of an important auxiliary engine protection system of the set, measuring and sampling by an instrument, and allocation of DCS hardware addresses; the inspection method comprises the following steps: collecting the design data of the thermal process protection system, and knowing the composition condition, the operation mode and the operation parameters of the thermal process protection system of the thermal generator set; checking the thermal process protection system of the thermal generator set by referencing to the latest national electric power industry regulations and specifications, and finding design defects and potential safety hazards; proposing a regulating solution for on-site regulation, finishing a static test and a dynamic test, and putting the thermal generator set into safe operation; and if the requirements are not met, returning to the regulation and test steps till meeting the requirement. The checking method has the advantages that the checking steps are simple and clear, the safety and the reliability are realized, the on-site debugging process is simple, and the operation and the implementation are convenient.

The invention belongs to the field of the foundry industry, and particularly relates to a sand core hanging nose fixing structure and a use method thereof. The sand core hanging nose fixing structurecomprises a fixing base and a positioning structure. The fixing base is used for fixing a hanging nose. The positioning structure is connected with the fixing base in a lap joint manner or a fixed manner. The positioning structure is installed on a sand core mold. A groove is formed in the end face, opposite to the end face connected with the positioning structure, of the fixing base in a concavemanner. At least one installation hole is formed in the inner wall of the bottom of the groove. A magnet is installed in each installation hole. The sand core hanging nose fixing structure is easy tooperate, easy to take out and high in universality.

The invention relates to a device for preparing metal nitride catalyst, wherein the mixer via tube is connected to the fluidize bend reactor whose outlet via tube is connected to the heat exchanger; the heat exchanger via tube is connected to the mixer, while said tube via six-way valve is connected to the gas spectrum device, and the heat exchanger via tube is connected to the water cooler; the separator via tube and drying part is connected to the compressor whose outlet via tube is connected to the heat exchanger; the cooler is connected to the inlet and outlet tubes of compressor; MoO3 / TiO2, MoO3 / NiO-TiO2, MoO3 / Al2O-TiO2 or MoO3 / Al2O3 is put into fluidize bed reactor, to process N2-H2 reduction to replace MoO3, to prepare the Mo2N / TiO2, Mo2N / NiO-TiO2, Mo2N / Al2O3-TiO2, or Mo2N / Al2O3 carried metal nitride catalyst; the volume ration between N2 and H2 is 3-5:1, and the reaction temperature is 933K+-10K, the temperature kept time is 0.5-1h. The invention can improve the product quality and prepare the gamma-Mo2N with high specific surface area.

The invention discloses a current three-phase linked switching device, and relates to an improvement on a current switching device. The switching device can meet the current application situation in China, greatly reduce operating strength, improve operating safety and convenience and avoid misoperation, is used for connecting and switching bypass current between a No.1 main transformer and a No.2 main transformer, and comprises a rectangular insulating movable plate and a rectangular insulating fixed plate, wherein conducting bar groups A, B, C and N are uniformly distributed in the transverse direction of the fixed plate at equal intervals; three conducting bars are arranged in each conducting bar group; lapping bars A, B, C and N are arranged in the transverse direction of the movable plate; the initial positions of the four lapping bars in the transverse direction of the movable plate are respectively consistent with those of 0# conducting bars in the conducting bar groups on the fixed plate in the transverse direction of the fixed plate; and the width of the lapping bars is L3 which is less than L2+2*L1 and more than L1. By the switching device, short circuit, withdrawal, investment and short circuit removing operation which is performed stepwise originally is changed into one-step operation, so that misoperation accidents are avoided.

The invention relates to a medium-voltage disconnecting switch manual-automatic intelligent electric operating mechanism. The medium-voltage disconnecting switch manual-automatic intelligent electric operating mechanism comprises an operating handle, a leave-joint gear, a transmission gear, a third gear, a screw rod, a slider, a transmission rod and disconnecting switch operating rods. The operating handle is sleeved on a hexagonal shaft of the leave-joint gear, the leave-joint gear is sleeved on the transmission rod, the third gear is connected with the screw rod into a whole, the slider is provided with threads in the middle and sleeved with the screw rod, and the three disconnecting switch operating rods are arranged on the slider. The operating mechanism further comprises an intelligent control module, a motor, a transmission case, a first gear and a second gear. According to the medium-voltage disconnecting switch manual-automatic intelligent electric operating mechanism, manual and automatic free switching of a disconnecting switch can be achieved, the whole structure is small and exquisite, structure assembly is simple and flexible, the medium-voltage disconnecting switch manual-automatic intelligent electric operating mechanism can be conveniently matched with various types of medium-voltage disconnecting switches, and the whole configuration is flexible.

The invention discloses a vertical pouring structure for mass production of well lids. The vertical pouring structure comprises a plurality of clay sand molds, a plurality of film covering sand molds and a platform. The dimension of the clay sand molds and the dimension of the film covering sand molds are both 1200 mm*1200 mm. The clay sand molds and the film covering sand molds are arranged on the platform alternately and orderly. After the clay sand molds and the film covering sand molds are combined, cavities are formed, and the upper portion of each cavity is provided with a pouring gate. After the clay sand molds and the film covering sand molds are combined, the two sides and the vertical surfaces of the sand molds are additionally provided with iron plates for fixing. According to the vertical pouring structure, through mixing usage of the clay sand molds and the film covering sand molds, the defect that existing clay sand molds are poor in air permeability is overcome, and the appearance quality of the well lids can be remarkably improved; and by the adoption of the vertical pouring structure, the forming speed of the well lids is increased, operation hidden danger is eliminated, and mass production of the well lids is achieved.

The invention discloses a dual-spectrum camera used in alpine regions, belonging to the field of electric power. The camera includes a casing, a hot air system located inside the casing and arranged in the lens, a hot air nozzle arranged on the surface of the lens, and a wiper; the hot air system includes a hot air channel and hot air control device; the hot air control device is located inside the hot air channel; the hot air control device includes a preheating control unit, a fan control unit and a heating control unit; the preheating control unit heats the air at the wide end to obtain preheated air; the fan control The unit pushes preheated air or external air to the tail of the narrow end; the heating control unit reheats the air at the tail of the narrow end; the outer layer of the camera shell and the hot air channel are all made of carbon fiber; The problem that spectral cameras cannot be used in winter in alpine regions can be widely used in substations in alpine regions, eliminating hidden dangers in the operation of substations and reducing the risk of electricity consumption in northern my country.

The invention discloses a motor flexible PG board, which comprises a substrate and Hall circuits arranged on the substrate. The substrate of the PG board adopts a flexible circuit board. The flexible circuit board is in an E-shaped structure comprising three branches. The Hall circuits are arranged on the top ends of the three branches respectively. The three branches are mutually nonparallel; the branches at the two sides converge to the middle and form acute-angle included angles with the middle branch respectively. The motor flexible PG board is in an axisymmetric distribution structure with the branch in the middle as a symmetry axis. The step of manual assembly of an insulating bush is saved; full-automatic SMD process is realized; the flexible PG board has flexible three-dimensional space assembly capability, and the PG boards of the same type can be fit to more motors; the flexibility of the PG board helps to reduce assembly labour intensity of workers effectively; and the motor flexible PG board is compatible with the PG boards of all hub motors, including a 60-degree motor and a 120-degree motor, and hub motors of different wheel diameters.