35results about How to "Safe and reliable long-term operation" patented technology

The invention discloses a forced water circulation high-capacity hot water boiler of a circulating fluidized bed, which relates to a hot water boiler of a fluidized bed, and aims to ensure water circulation safety and power failure protection of a high-capacity hot water boiler of a circulating fluidized bed. A water supply distribution header is connected with lower coal economizers; the lower coal economizers, middle coal economizers and upper coal economizers are sequentially connected with one another; the upper coal economizers are connected with a coal economizer upper header; the coal economizer upper header is connected with a collection water bag by a coal economizer coating pipe; the collection water bag is connected with water cooling wall lower headers by a descending pipe; the water cooling wall lower headers are connected with a hearth water cooling wall; the hearth water cooling wall is connected with water cooling wall upper headers; the water cooling wall upper headers are connected with a boiler cylinder by extraction pipes; the water supply distribution header is connected with a separator water cooling sleeve by a water cooling sleeve water intake pipe; the separator water cooling sleeve is connected with the boiler cylinder by a water cooling sleeve water outlet pipe; the boiler cylinder is connected with the water cooling wall lower headers by communicating pipes, and is connected with the water supply distribution header by a power failure water supply pipe. The forced water circulation high-capacity hot water boiler provided by the invention is applied to large concentrated heat supply and warming.

The invention relates to a centrifugal impeller optimal design method for preventing vibration localization from happening. The method comprises the following steps of: 1, carrying out static strength verification; 2, drawing a vibration mode graph of a plurality of orders of modals in front of an impeller; 3, analyzing a forbidden band and a passband of the impeller; 4, determining the excitation frequency of an excitation source; 5, judging whether the excitation source drops in the forbidden band or is close to the forbidden band; and 6, optimizing the impeller structure and increasing the isolation margin of the forbidden band of the impeller so as to eliminate influence of detuning. According to the centrifugal impeller optimal design method disclosed by the invention, the vibration localization problem of the impeller in the operation process can be effectively solved, the injuries caused by vibration localization and the failure occurrence rate of the impeller in the operation process are reduced, and a centrifugal impeller unit can be ensured to operate safely and reliably for a long time.

The invention discloses a novel high-pressure pipeline rotating compensator, and belongs to the technical field of pipeline supporting piping, in particular structures applied to heat pipeline compensating devices. The novel high-pressure pipeline rotating compensator comprises an outer connecting pipe B and an outer connecting pipe A which are inserted in each other; an outer convex ring is arranged on the outer connecting pipe A; an inner bearing platform and a gap bridge are arranged on the outer connecting pipe B; an inner boss is arranged on the gap bridge; a sealing component B, a sealing component A and a sealing seat are sequentially arranged outside along the outer connecting pipe A. According to the technical scheme, the novel high-pressure pipeline rotating compensator has the advantages of being high in precision, small in damage due to pressing, high in bending resistance and bearing capacity, free of limitation from medium flowing direction, outstanding in sealing performance, safe and reliable in long-term running of pipelines, and convenient to maintain.

The invention discloses an outdoor primary and secondary fusion isolation knife built-in intelligent post switch, which comprises an aluminum alloy base and an aluminum alloy housing matched with thealuminum alloy base, The aluminum alloy housing is fastened on the aluminum alloy base to form an outer enclosure box, a plurality of isolation knife main circuit driving structures are arranged in the outer enclosure box, a left current sensor is arranged at the inner end of the left outlet terminal, and a right current sensor is arranged at the inner end of the right outlet terminal; The inner end of the outer enclosure is provided with a hollow chamber, A power operating mechanism is installed in the hollow chamber, The power operation mechanism comprises a front panel and a rear panel, a component mounting chamber is formed between the front panel and the rear panel, and an isolation power mechanism for controlling the separation knife to separate and close, a circuit breaker power mechanism for controlling the circuit breaker to be on and off, and a circuit breaker closing energy storage mechanism for circuit breaker to be on and off for energy storage are installed in the component mounting chamber; The whole power operation mechanism can provide power source to the circuit breaker and the isolating knife separately or simultaneously.

The invention provides a compressor. The compressor comprises a casing, an oil pump and a guide isolation assembly, wherein an oil sump for containing lubricating oil is arranged at the bottom part of the casing; the oil pump is arranged in the casing; the guide isolation assembly is arranged at the bottom part of the casing, and is positioned under the oil pump; the guide isolation assembly comprises an isolation part, the isolation part comprises at least two isolation parts of which the cross sections are of sealed structures, the at least two isolation parts are sheathed by layers, and an isolation groove is formed between the adjacent isolation parts; the oil pump is used for sucking the lubricating oil, and the isolation parts are used for isolating the impurities of the lubricating oil into the isolation groove. The compressor has the advantages that the guide isolation assembly is used for effectively blocking most of impurities from entering an oil path system, the running risk of the compressor is effectively decreased, the abrasion of the moving parts of the compressor due to impurities is avoided, the long-time running of the compressor is safer and more reliable, and the reliability of the compressor is improved. The invention also provides a refrigerator.

The invention discloses an impeller optimization design method for preventing a targeted energy transfer phenomenon during vibration of an impeller. On the basis of traditional static strength analysis and design, dynamic characteristics of the impeller under the detuned ideal condition are analyzed, the forbidden band and the pass band of the impeller are recognized, then all frequency components of an excitation source borne by the impeller are listed, whether the frequency components fall into the forbidden band is judged, an impeller mechanism is required to be amended and optimized under the condition that the frequency components fall into the forbidden band, and thus the targeted energy migration phenomenon is prevented during vibration of the impeller. The method has the guiding significance in design and manufacturing of a new generation of centrifugal impellers, the problem of local large-amplitude vibration in the running process of the impeller can be effectively solved, damage caused by vibration can be reduced, and the failure rate in the running process of the impeller can be reduced, so that a centrifugal impeller unit can run safely and reliably for a long time. The safety and the high efficiency of the impeller designed with the method can be improved to a large extent.

The invention relates to an electrostatic flash micro-spray circulating cooling system for heat dissipation of high-power chips, which includes a spray chamber, a charging chamber and a cooling medium refrigeration circulation pipeline mechanism; through the cooling medium refrigeration circulation pipeline mechanism, the liquid The cooling medium is sent into the charging chamber, and the charged droplets obtained through the charging chamber can enter the micro-channel nozzles of the spray chamber, so that the charged droplets can be deposited on the target surface under the action of the spray droplet electric field through the micro-channel nozzles. The surface of the heat sink, the cooling medium after cooling the heat sink is returned to the cooling medium refrigeration cycle pipeline mechanism, so that the current temperature of the heat sink collected by the heat sink temperature sensor is consistent with the preset target temperature in the circulating cooling controller consistent. The invention can effectively solve the high-efficiency heat dissipation of high-power chips, improve cooling efficiency, reduce system volume, and meet the technical requirements for miniaturization, integration and high reliability of cooling systems in the fields of national defense and aerospace.

A filter bag type dust collector with a self-circulation dust removal device, relating to a dust collector, the dust collector includes a basic support, an air flow uniform distribution and flow guide device, a filter bag room, a clean air room, a filter assembly, a self-circulation Ash cleaning system, ash hopper, electrical control system, also includes insulation layer, platform, stairs, pre-coating system; the air inlet is equipped with airflow uniform distribution and flow guide devices, and the bag area is equipped with forward and upward airflow channels, The filter bags are arranged in groups in a rectangular room, and several filter bag openings are pressed together with a steel plate through bolts, so that the filter bags are firmly stuck in the hole of the flower plate. The filter bag holes are made on the flower plate, and the orifice plate is smooth without burrs. , The filter bag forms a double sealing structure on the upper part of the flower plate and the inner edge of the flower plate hole. The dust collector adopts the low-pressure air blowing generated by the centrifugal fan, and the airtight and non-leakage dust removal can not only ensure the blowing effect, but also prevent the filter bag from being slightly damaged, and the operation is safe and reliable. , to achieve the purpose of dust removal.

The invention discloses a forced water circulation high-capacity hot water boiler of a circulating fluidized bed, which relates to a hot water boiler of a fluidized bed, and aims to ensure water circulation safety and power failure protection of a high-capacity hot water boiler of a circulating fluidized bed. A water supply distribution header is connected with lower coal economizers; the lower coal economizers, middle coal economizers and upper coal economizers are sequentially connected with one another; the upper coal economizers are connected with a coal economizer upper header; the coal economizer upper header is connected with a collection water bag by a coal economizer coating pipe; the collection water bag is connected with water cooling wall lower headers by a descending pipe; the water cooling wall lower headers are connected with a hearth water cooling wall; the hearth water cooling wall is connected with water cooling wall upper headers; the water cooling wall upper headers are connected with a boiler cylinder by extraction pipes; the water supply distribution header is connected with a separator water cooling sleeve by a water cooling sleeve water intake pipe; the separator water cooling sleeve is connected with the boiler cylinder by a water cooling sleeve water outlet pipe; the boiler cylinder is connected with the water cooling wall lower headers by communicating pipes, and is connected with the water supply distribution header by a power failure water supply pipe. The forced water circulation high-capacity hot water boiler provided by the invention is applied to large concentrated heat supply and warming.

The invention discloses a fault switching system and method for a protection device of a flexible DC converter valve valve control system, and relates to the field of flexible DC power transmission. The valve control system of the converter valve includes a set of independent "two out of three" protection devices for the flexible DC converter valve. A board, the outlet board is used to output protection action signals. The present invention utilizes the failover system to perform reasonable switchover according to different failure conditions of the protection device, and adds the function of manual intervention on the basis of prioritizing the independent judgment of the valve control system, so as to ensure the safe and reliable operation of the valve control system.

The invention provides a compressor. The compressor comprises a casing, an oil pump and a guide isolation assembly, wherein an oil sump for containing lubricating oil is arranged at the bottom part of the casing; the oil pump is arranged in the casing; the guide isolation assembly is arranged at the bottom part of the casing, and is positioned under the oil pump; the guide isolation assembly comprises an isolation part, the isolation part comprises at least two isolation parts of which the cross sections are of sealed structures, the at least two isolation parts are sheathed by layers, and an isolation groove is formed between the adjacent isolation parts; the oil pump is used for sucking the lubricating oil, and the isolation parts are used for isolating the impurities of the lubricating oil into the isolation groove. The compressor has the advantages that the guide isolation assembly is used for effectively blocking most of impurities from entering an oil path system, the running risk of the compressor is effectively decreased, the abrasion of the moving parts of the compressor due to impurities is avoided, the long-time running of the compressor is safer and more reliable, and the reliability of the compressor is improved. The invention also provides a refrigerator.

The invention relates to a subway energy feedback device draught fan speed regulation method based on power prediction. The subway energy feedback device draught fan speed regulation method based on the power prediction includes following steps: step 1, obtaining reference value of current corresponding to predicted power according to current corresponding to the maximum power value of feedback peak power, collected on an adjacent station platform in the last period, of a subway energy feedback device, and performing compensation and regulation on the reference value of the current corresponding to the predicted power according to output current, collected by a current station platform in real time, of the subway energy feedback device; and step 2, beginning to start a draught fan, starting the draught fan by adopting rotation speed corresponding to the predicted power current reference value, then compensating and regulating the reference current, completing regulation until the subway energy feedback device outputs the maximum peak current, keeping stable output of the rotation speed of the draught fan, setting temperature to be lower than preset quit threshold value, regulatingthe rotation speed of the draught fan, and reducing the rotation speed of the draught fan until the draught fan rotates at the low speed or stops running. The subway energy feedback device draught fanspeed regulation method is simple to operate in the whole process, does not need to frequently regulate the draught fan, and guarantees that temperature variation difference of power devices is reduced under the working condition that subway braking has strong periodicity and large power sudden change.

The invention relates to a real-time online measuring device and method, in particular to a two-dimensional surface heat flux density real-time online measuring device and method. According to the technical scheme provided by the invention, the two-dimensional surface heat flux density real-time online measuring device comprises a base body and a base body temperature sensor capable of monitoringthe temperatures of multiple points of the base body, the base body temperature sensor is electrically connected with a measurement control calculation device through a data acquisition board card, and the measurement control calculation device can synchronously acquire the temperatures of multiple points of the base body monitored by the base body temperature sensor through the data acquisition board card; and the measurement control calculation device calculates and determines the surface multi-point heat flux density of the base body by adopting a two-dimensional filtering method after obtaining the multi-point temperature values of the base body. The online monitoring and measuring problems of the surface heat flux density of thermal conversion equipment such as boilers and internal combustion engines can be solved, and therefore optimization and development of related industrial processes are promoted.

The invention discloses a novel high-pressure pipeline rotating compensator, and belongs to the technical field of pipeline supporting piping, in particular structures applied to heat pipeline compensating devices. The novel high-pressure pipeline rotating compensator comprises an outer connecting pipe B and an outer connecting pipe A which are inserted in each other; an outer convex ring is arranged on the outer connecting pipe A; an inner bearing platform and a gap bridge are arranged on the outer connecting pipe B; an inner boss is arranged on the gap bridge; a sealing component B, a sealing component A and a sealing seat are sequentially arranged outside along the outer connecting pipe A. According to the technical scheme, the novel high-pressure pipeline rotating compensator has the advantages of being high in precision, small in damage due to pressing, high in bending resistance and bearing capacity, free of limitation from medium flowing direction, outstanding in sealing performance, safe and reliable in long-term running of pipelines, and convenient to maintain.

The invention discloses a steel ladle positioning sensor bracket and a steel ladle capable of being positioned. The steel ladle positioning sensor bracket comprises the steel ladle and a radio frequency sensor, wherein the radio frequency sensor is mounted on the side wall of the steel ladle through a bracket, the bracket comprises a mounting frame and a wireless signal sensor seal box mounting base, the mounting frame is made from steel and fixed with the side wall of the steel ladle, a heat isolating plate is arranged between the mounting frame and the mounting base, a protection cover tilted downwards is arranged above the heat isolating plate and the mounting base, the heat isolating plate is a heat isolating plate bent with at least two planes, one plane is parallel with the longitudinal direction of the mounting frame and used for isolating the horizontal heat radiation of the steel ladle, and the other plane is on the lower side of the mounting base and is used for isolating heat radiation from the lower side of the steel ladle. The structure is simple. An insulating plate of which the thickness is not smaller than 5mm is made by pressing mica powder, the structural shape of the heat isolating plate well solves the heat isolating and heat dissipating problem of the sensor, and practice shows that the sensor can safely and reliably run for long time.