62results about How to "Affect safe operation" patented technology

The invention provides a thermal control loop heat pipe of an integrated structure. The thermal control loop heat pipe comprises a structure thermal control hollow metal pipe body filled with phase change media. The structure thermal control hollow metal pipe body is a loop heat pipe (LHP) formed by connecting a condensation pipe and an evaporator in series, the two sides of the evaporator are connected with liquid accumulators where a steam pipe and a reflux pipe pass, and the liquid accumulators on the two sides are both filled with liquid working media. After heat emitted by a heat source is absorbed by an evaporation pipe, the phase of the liquid working media is changed, the liquid working media enter the condensation pipe through the steam pipe to release heat to be condensed and flows back to the evaporation pipe through the reflux pipe, and then a complete loop heat pipe cycle is completed. According to the thermal control loop heat pipe, integration is adopted, a semiconductor refrigeration manner is used, heat emitted out of the interior of the complex structure can be effectively led out accordingly, and the application range of a heat pipe thermal control system is greatly expanded.

The invention relates to a centralized air supply device of a railway car equipment compartment and an equipment compartment ventilation system. The equipment compartment is composed of a apron board, a bottom plate, an end plate and a framework, one or two centralized air supply devices are installed in the equipment compartment, first air inlets and first air outlets are formed in the apron board, an air inlet of the centralized air supply device is communicated with the first air inlets in the apron board, and an air outlet of the centralized air supply device is communicated with the equipment compartment and used for providing cooling air for air-using equipment in the equipment compartment. Inlet air for the air-using equipment in the equipment compartment is extracted in the equipment compartment, the heat radiation and air filtering effects are good, micro-positive pressure in the equipment compartment is guaranteed, the ways that dust and ice snow enter the equipment compartment are reduced, the number of the first air inlets in the apron board is reduced, and manufacturing and maintenance cost is lowered so that cars can run safely in extremely cold, strong sandy wind, high-temperature environments and other severe environments.

The invention discloses a tuning propeller control method and device, and computer readable storage medium. The tuning propeller control method includes: acquiring operating condition data of a wind generating set in a wind farm; predicting wind conditions of the wind farm according to the operating condition data; and if the wind condition is gust, increasing the tuning propeller speed of the pitch angle feedback regulator of the wind generating set until the end of the gust, and restoring the tuning propeller speed of the pitch angle feedback regulator. By adopting the technical scheme, thegust wind condition can be effectively predicted, and the tuning propeller can be cut into the wind generating set in time based on the gust wind condition.

The invention discloses a mouse cage elastic support metal rubber damper. The mouse cage elastic support metal rubber damper comprises an elastic support module; the elastic support module comprises abracket, a rotating shaft inserted in the bracket, a bearing sleeving the rotating shaft, and a mouse cage elastic support for supporting the rotating shaft and the bearing; the mouse cage elastic support comprises an elastic support mounting edge fixedly connected with the bracket, an elastic strip arranged on the side of the elastic support mounting edge, and an elastic support bearing base arranged at the end of the elastic strip for mounting the bearing; an end cover is arranged at the end of the bracket; a cavity structure module and metal rubber for providing support damping to a rotorsystem are arranged around the elastic support bearing base; the cavity structure module, the inner end surface of the end cover, the inner wall surface of the bracket and the outer wall surface of the elastic support bearing base form a closed cavity; and the metal rubber is arranged in the closed cavity. In the mouse cage elastic support metal rubber damper, the main support damping is providedto the rotor system through the metal rubber, so that the stable linear support rigidity in the wider extrusion deformation range is guaranteed.

The application discloses a transformer winding deformation and capacitance-type bushing fault detection device and method capable of controlling opening and closing of the DC control switch and the detection control switch, measuring the resonance wave, the resonance wave time and the frequency characteristic of the transformer winding. The measured resonance wave is compared with the historical resonance wave to determine whether the transformer winding is deformed or not. The partial discharge magnitude of the capacitance-type bushing is measured, and the capacitance and the dielectric dissipation factor of the capacitance-type bushing are estimated according to the resonance wave time and the frequency characteristic. The partial discharge magnitude, the capacitance and the dielectric dissipation factor are analyzed to determine whether the capacitance-type bushing has defects or not. The device and method provided by the present invention can detect the transformer winding deformation and the capacitance-type bushing fault in time to protect the transformer from being influenced by emergency.

The invention discloses a wind power compatibility network safety analysis method for the coordinated dispatching of wind power and conventional energy sources. The method aims to maximize system compatibility, and is implemented based on day-ahead power generation planning input and output data, the predicted power of wind power and a wind power fluctuation confidence interval are read, various kinds of constraint conditions comprising all day-ahead planning constraint conditions of a wind generation set and a conventional energy source machine sets are comprehensively taken into account to include a wind power compatibility analysis feasible region in day-ahead planning and ensure the guiding significance of a wind power compatibility analysis result for the day-ahead planning, and an output expression of the wind generation set is modified respectively to generate two optimal mathematical models to obtain a system wind power fluctuation curve capable of ensuring strict consistency with constrains of safety and the like of a power grid and give an alarm about wind power dispatching safety in advance. In addition, the method has the characteristics of low calculation intensity and high adaptability, and is more suitable for popularization and application in a dispatching organization with higher wind power access power in China.

The invention relates to a start control method and system for a variable-frequency air conditioner and the air conditioner. The start control method for the variable-frequency air conditioner comprises the following steps that a target frequency Fd, a first frequency Fa and a second frequency Fb are set; a variable-frequency compressor is controlled to operate at the frequency Fa till a pressure difference is established, and a four-way valve of the variable-frequency air conditioner reverses; the frequency of the variable-frequency compressor is controlled to drop to the frequency Fb from the frequency Fa, the variable-frequency compressor operates at the frequency Fb for the time T1, and pressure buffering and preheating are conducted on the variable-frequency air conditioner; the target frequency Fd is compared with the frequency Fb, and the frequency of the variable-frequency compressor is controlled to directly drop to the target frequency Fd if the target frequency Fd is smaller than the frequency Fb; the second frequency Fb of the variable-frequency compressor is controlled to be stabilized at the target frequency Fb after frequency rising and frequency dropping are conducted multiple times if the target frequency Fd is larger than the frequency Fb. According to the start control method and system for the variable-frequency air conditioner and the air conditioner, frequency rising of an air-conditioning system can be achieved, and the situations that safe operation of the compressor is affected due to the fact that oil is excessively discharged during frequency rising of the compressor and other components of the system are damaged due to the fact that the pressure difference changes too rapidly are avoided.

The invention belongs to the technical filed of temperature measurement, particularly relates to a distribution type infrared online temperature measurement system for electric terminals of high-voltage equipment, and comprises a temperature sensing module, a base station and a remote control terminal. The temperature sensing module is used for monitoring temperature information at a set temperature monitoring point and transmitting a temperature signal and / or an alarming signal to the base station through a wireless network. The base station is used for receiving the temperature signal and / or the alarming signal and transmitting the temperature signal and / or the alarming signal to the remote control terminal through a wired network or the wireless network. The remote control terminal is used for enabling management staffs to check operation conditions of the whole temperature measurement system in real time and to configure operation parameters of the temperature measurement system in real time. The temperature measurement system can achieve full-automatic online temperature monitoring of the electric terminals, achieves insulation between a temperature measurement element and a high-voltage line through a non-contact type temperature measurement mode, and ensures reliable operation.

The invention discloses an energy-gathering rotary accelerating silt removal method for a long-distance standard-section artesian ditch. The method includes the steps of 1, determining the position and the number of energy-gathering rotary accelerating silt removal parts according to the environmental condition of the artesian ditch; 2, arranging an intra-ditch desilting basin in a bottom of the artesian ditch, arranging an extra-ditch desilting basin outside the artesian ditch, arranging energy-gathering cones on the downstream sides of bottom sills of radial gates of a regulating sluice, arranging energy-gathering rotary accelerating water pipelines between the intra-ditch desilting basin and the energy-gathering cones, arranging rotary accelerating water pipe valves on the energy-gathering rotary accelerating water pipelines, communicating the intra-ditch desilting basin to the extra-ditch desilting basin through a silt drawing pipe and arranging a silt drawing pipe valve at the tail end of the silt drawing pipe; and 3, removing silt on the bottom of the ditch. The method has the advantages that on the premise of realizing continuous water transferring and supplying of the long-distance standard-section artesian ditch, the flowing energy of water in the ditch is gathered to remove the silt in the ditch, and the phenomenon that the silt in the ditch is deposited seriously and influences safe operation of water conservancy facilities is prevented.

The invention relates to the technical field of monitoring systems, in particular to an unattended power comprehensive automatic monitoring system and method and a storage medium. The system comprisesa monitoring center and an environment monitoring module, the environment monitoring module comprises a monitoring unit, an analysis unit, a temperature preprocessing unit, a humidity preprocessing unit and a concentration preprocessing unit, and the monitoring center is used for controlling the preprocessing unit to preprocess an indoor transformer substation when the environment information value acquired by the monitoring unit is smaller than the parameter threshold generated by the analysis unit and greater than the preset standard value. The monitoring unit can monitor the environment information in the indoor transformer substation around the clock, and when the environment information value collected by the monitoring unit is smaller than the parameter threshold value generated bythe analysis unit and larger than the preset standard value, the monitoring center controls the preprocessing unit to correspondingly preprocess the indoor transformer substation. It can be effectively guaranteed that the indoor transformer substation can work continuously and stably, and power supply accidents are effectively reduced.

The invention belongs to the technical field of machining, and particularly relates to a three-jaw chuck. The three-jaw chuck comprises a chuck body and clamping jaws, wherein each of the three clamping jaws is formed through the mode that three transverse pressing blocks are adopted to mutually be overlapped and spliced, guiding sliding grooves are formed inside the pressing blocks at the bottommost ends of the clamping jaws, and clamping grooves are formed in the bottom ends of the guiding sliding grooves; sliding blocks are slidably arranged in the guiding sliding grooves, and pressing plates are connected to the bottom ends of the sliding blocks; the pressing plates and the clamping grooves are mutually clamped and matched; threaded locking holes are formed in the sliding blocks; countersunk threaded holes are formed in the vertical directions of the clamping jaws; the countersunk threaded holes are in threaded connection with the threaded locking holes through inside hexagonal bolts; the bottom ends of the threaded locking holes are provided with bearings, and rotating columns are connected in the bearings; and inner hexagonal bolts are arranged in the rotating columns in an inserting mode. The phenomenon that the clamping force of the chuck body to a cylinder is small due to the fact that the diameter of the machined cylinder is different, the cylinder breaks or is damaged under the state that the cutting force is large, and therefore the safe operation of the chuck body is influenced is prevented.

The invention relates to a magnetic levitation bearing framework and a magnetic levitation bearing. The magnetic levitation bearing framework comprises an annular framework body of a hollow structure. The framework body is used for allowing a working coil to be wound thereon. A coil outlet through which the working coil can come out is formed in the framework body. According to the magnetic levitation bearing framework, the annular framework body of the hollow structure is arranged and can be used for allowing the working coil to be wound thereon, and the coil hole is formed in the magnetic levitation bearing framework so that the working coil can come out through the coil outlet, and the situations that abrasion is caused due to friction between the working coil and a bearing core or between the working coil and other components when the working coil comes out, an insulating layer is damaged, and the service life of the working coil is shortened, or safe operation of a whole assembly is affected are prevented easily.

The invention relates to a continuous slag discharging device of a biomass particle combustion furnace. The continuous slag discharging device of the biomass particle combustion furnace comprises a rotary grate and a rotary slag pulverizing rod. The rotary grate is composed of a plurality of rotary cast iron grate bars. Graphite bearings are mounted at the two ends of each cast iron grate bar. The graphite bearings are fixed to the furnace wall of the bottom of the combustion furnace through masonry or pouring. The rotary slag pulverizing rod is fixed through high-temperature-resistant bearings which are mounted on the upper surface and the lower surface of a steel plate at the bottom of the combustion furnace. The rotary grate is driven by a first driving mechanism. The rotary slag pulverizing rod is driven by a second driving mechanism. The continuous slag discharging device of the biomass particle combustion furnace is simple in structure and reasonable in design; and in the biomass particle combustion process, ash slag is continuously discharged out of a combustion chamber of the combustion furnace and prevented from being accumulated on the rotary grate, and thus safe and efficient combustion is guaranteed.

The invention discloses a telecommunication equipment upgrading and maintenance method for a telecommunication network transmission system. The method comprises the following steps of: A10, designing functional instruction sets of each piece of telecommunication equipment to form protocols by using an extensible markup language (XML) according to the functions of the telecommunication network transmission system respectively, and designing corresponding software for realizing corresponding functional instructions in the protocols on each piece of equipment according to the protocols; A20, saving corresponding protocols and software supported by the telecommunication equipment on the telecommunication equipment; A30, setting a synchronizer at a server in the telecommunication network transmission system, acquiring the functional instruction sets and the software on each piece of controlled telecommunication equipment according to the instructions of the synchronizer, and updating the server; and A40, selecting a proper opportunity, and upgrading the software of the corresponding telecommunication equipment by utilizing the instruction sets and the software obtained by the step A30. In the method, a network management system can automatically discover incompatible or temporarily unsupported telecommunication equipment, acquire related resources from the telecommunication equipment and upgrade own instruction set, thereby supporting the management of newly added telecommunication equipment.

The invention discloses a water feeding system for multiple condensing boilers. At least two condensing boilers can be used, and the condensing boilers are respectively provided with a condensing economizer, the water feeding system comprises a soft water tank, a soft water pump, a deaerator, a water supply main pipe, a water return main pipe, a bypass adjusting valve, a branch pipe adjusting valve, a water intake adjusting valve and a PLC (programmable logic controller) control cabinet, all the condensing economizers adopt the parallel main pipe type water supply mode, and the amount of water fed into each condensing economizer is controlled by the water intake adjusting valve according to the exhaust gas temperature; the water supply main pipe and the water return main pipe are communicated via the bypass adjusting valve, and the water return main pipe is also connected with an inlet of the deaerator; a branch pipe on the water return main pipe is communicated with the soft water tank through the branch pipe adjusting valve; the soft water tank is communicated with the water supply main pipe through the soft water pump; and the whole water feeding system is controlled by the PLC control cabinet. The effect of balance of water supply for different condensing boilers in different operating modes can be realized, the thermal efficiency of the boiler can be increased, the normal water level of the deaerator can be ensured, and automatic control can be realized.

The invention discloses a solar electrical cabinet with the automatic temperature adjusting function. The solar electrical cabinet comprises an electrical cabinet body, a solar power supply system installed at the top of the electrical cabinet body and a temperature control system installed on the upper portion of the electrical cabinet body. The interior of the electrical cabinet body is internally provided with foaming agents, an interlayer is arranged outside the electrical cabinet body, and the foaming agents and the interlayer have the heat insulation and heat preservation effects on the interior of the electrical cabinet body. The solar power supply system comprises a solar crystalline silicon assembly, a controller and a storage battery. The temperature control system comprises a semiconductor air-conditioner, an in-cabinet temperature instrument and an out-cabinet temperature instrument. Through the design of the solar electrical cabinet, the solar electrical cabinet can assist power supply, the refrigeration or heating function on the interior of the solar electrical cabinet is achieved through the temperature control system, it is accordingly guaranteed that the temperature in the solar electrical cabinet is within the working temperature range of an electrical apparatus element, and the situation that safety operation of an electrical power system is influenced by advanced ageing breakdown and the like of the electrical apparatus element at the extra-low or extra-high temperature is avoided.

The invention discloses a special tool for quickly removing ice coatings of a power transmission line. The tool comprises a deicing box, a gap-adjusting mechanism, an ice crushing mechanism and a wiretake-up mechanism; the inner wall of the deicing box is slidably connected with the gap-adjusting mechanism; the top of the gap-adjusting mechanism is fixedly connected with the ice crushing mechanism; and one end of the outer side of the deicing box is fixedly connected with the wire take-up mechanism. The tool of the invention is compact in structure. Since the gap-adjusting mechanism is adopted, a gap between a first ice crushing gear and a second ice crushing gear can be adjusted according to the diameter of the power transmission line through a gap-adjusting screw rod under the action ofa left-hand thread and a right-hand thread, so that the tool can be used for power transmission lines of different diameters, and therefore, the application range of the ice crushing tool is expanded; a wire take-up box is adopted, the length of a drawstring can be adjusted flexibly according to needs, and therefore, the structure of the ice crushing tool is flexible and adjustable, the practicability of the ice crushing tool is greatly improved, the ice coatings of wires inside a span can be quickly treated, and the ice coatings can be prevented from affecting the safe operation of the transmission line.

The invention discloses an online minor repair method for 300 / 380KA large-scale prebake cells. The method comprises the following steps of: when lining damage or red furnace or furnace leakage occursat the side part of a prebake cell, pulling out an anode carbon block at a leakage point in time without stopping the cell; encircling the periphery of the leakage point by molten aluminum and liquidelectrolyte through a mixture of electrolyte and aluminum oxide; cooling the outer side of the cell shell leakage point of the prebake cell via blowing by using compressed air; when the temperature islower than 150 DEG C, starting to clean the inner side of the leakage point to ensure that the bottom is flat and the vertical face is straight; cleaning the residual materials, cooling via blowing by using compressed air, when the temperature is reduced to 100 DEG C, paving a thickener and carrying out compaction, constructing an anode carbon block at the top of the thickener, and tamping aluminum oxide between the lateral anode carbon block and the cell shell; after the repair, carrying out baking for 24, and mounting the pulled anode carbon block. According to the method, rapid repair is carried out in a shortest time without stopping the cell, so that large-area molten aluminum leakage caused by untimely processing is prevented from thrusting buses around the cell and then influencingthe safe operation of electrolytic series.

The invention provides an electric transmission line nest clearing device and a using method thereof, and belongs to the technical field of electric transmission line obstacle removing tools. The electric transmission line nest clearing device comprises a supporting mechanism, a disassembling mechanism and a post clearing mechanism; the supporting mechanism comprises a base, a supporting rod and a brace arranged on the base, and an insulation telescopic rod is connected to the end of the supporting rod through a bolt; the disassembling mechanism comprises a microphone and a storage bag which are arranged at the upper end of the insulation telescopic rod, rubber rings are fixedly arranged on an opening and a body of the storage bag in a surrounding mode, multiple baffles are fixedly arranged on the opening of the storage bag at intervals, and a rope is arranged on the opening of the storage bag in a surrounding mode and is wound around a first wire wheel and a second wire wheel on the lower portion of the supporting rod; the post clearing device comprises a driving motor arranged on the insulation telescopic rod and a wind wheel connected with the driving motor through a rotating shaft, and a switch button electrically connected with the driving motor is arranged on the supporting rod. In the nest clearing process, nest integrity is ensured, sundries scattered by a nest can be prevented from falling off freely, and the electric transmission line nest clearing device clears the nest more thoroughly and is accurate and efficient.

The invention belongs to the field of pneumatic control systems of railway wagons. In order to realize the function of opening and closing of bottom doors during an unloading process of entire freight cars, the invention provides a control system for controlling the opening and closing of the bottom doors of entire coal hopper cars with a model 120 valve. The control system comprises a train main pipe connected with a locomotive air compressor, wherein the train main pipe is equipped with angle cocks for controlling on-off connection with each car; a plurality of bottom door opening and closing control units are connected with the external part of the train main pipe; each bottom door opening and closing control unit correspondingly controls the opening and closing of the bottom door of each car; the bottom door opening and closing control units have the function of controlling the opening and closing of the bottom doors and the function of self-locking with pressure holding when the bottom doors are closed; and input signals of the bottom door opening and closing control units are air pressure variations provided by the train main pipe. The control system utilizes an inflating and relieving position, a common retarder position and a pressure holding position of the model 120 control valve to control the operation of a bidirectional air cylinder, thereby completing the opening and closing control of the bottom doors of the entire coal hopper cars.

The invention discloses an energy-saving and environment-friendly heat-conducting oil boiler which includes a boiler main machine, a waste heat boiler and an air preheater. The waste heat boiler includes a vertical body; the vertical body is internally provided with a vertical snakelike heat exchange tube, and the straight pipe section of the vertical snakelike heat exchange pipe is inclined upwards; an upper outlet of the vertical snakelike heat exchange pipe communicates with a steam inlet of a steam drum; a common downcomer is arranged at the bottom of the steam drum, and a steam outlet pipe seat is arranged at the top of the steam drum; the air preheater includes an outer frame, and a plurality of vertical heat exchange pipes are arranged inside the outer frame; a flue gas outlet of the boiler main machine is connected with a flue gas inlet in the top of the waste heat boiler; and the flue gas outlet in the bottom of the waste heat boiler communicates with the vertical heat exchange pipes in the air preheater. The final exhaust gas temperature of the boiler can be effectively reduced by installing a two-stage energy-saving device including the waste heat boiler and the air preheater at the tail end of the boiler main machine, so that the final exhaust gas temperature of the boiler is not higher than 100 DEG C, and the thermal efficiency of the boiler is greatly improved.

The invention belongs to the technical field of industrial production, and particularly discloses a recyclable shot blasting device. An installing frame is installed on the two sides of an opening ofa machine body in a penetrating mode. A rotating frame is formed in the inner side of the installing frame. A plurality of first rotating shafts are installed in the installing frame through a rotating sleeve in the horizontal direction of the installing frame. The first rotating shafts are sleeved with rotating rollers. Rotating bearings are arranged at the two ends of each second rotating shaftcorrespondingly. The rotating bearings are installed on a conveying belt through fixing sleeves. Rotating belt wheels are installed at the two ends of each second rotating shaft. The rotating belt wheels are located outside the rotating bearings. The rotating belt wheels are rotationally connected through a belt. A rotating cylinder is installed on each second rotating shaft. A converting mechanism is arranged outside the installing frame and used for exerting the transmission effect on the conveying belt and the rotating cylinders. It is effectively avoided that the fracture or breakage phenomenon is generated when the rotating cylinders work for a long time in the machine body and the safety operation of the rotating cylinders is affected.

The invention provides a dehumidifying method and system. A humidity sensor detects the humidity value of gas in a control box, and a first controller controls a dehumidifying device with the humidity value detected by the humidity sensor to adjust the humidity of gas in the control box, thus controlling the dryness in the control box of transformer equipment, and solving the problem of frequent grid accidents caused by the reason that components in the control box are easily damped to influence the safety operation of the transformer equipment.

The invention discloses an exciter cooler inner and outer leakage liquid monitoring system and method. The monitoring system comprises an inner leakage liquid monitoring system and an outer leakage liquid monitoring system which are independent. The inner leakage liquid monitoring system comprises an inner leakage liquid collection pond, a leakage liquid collection pipe and an inner leakage liquidmonitoring device, the inner leakage liquid collection pond collects inner leakage liquid of an exciter cooler, the inner leakage liquid is introduced into the inner leakage liquid monitoring devicethrough the leakage liquid collection pipe so as to achieve monitoring of the inner leakage liquid in the cooler, the outer leakage liquid monitoring system comprises a water receiving disc, a leakageliquid collection pipe and an outer leakage liquid monitoring device; the water receiving disc collects outer leakage liquid of the exciter cooler, the outer leakage liquid is introduced into the outer leakage liquid monitoring device through the outer leakage liquid collection pipe so as to achieve monitoring of outer leakage liquid of the cooler. The method is the specific monitoring work stepof the monitoring system. According to the system and method, in the exciter running process, the inner pipeline leakage condition and the outer pipeline leakage condition of the cooler can be effectively monitored at the same time.

The invention relates to the technical field of steam turbines, in particular to a steam turbine drainage control method and a steam turbine drainage system. The steam turbine drainage control methodcomprises the following steps that firstly, the pressure P and the temperature T in a steam cylinder of a steam turbine are obtained in real time; secondly, the state of a medium in the steam cylinderis obtained through the pressure P and the temperature T in the steam cylinder; then, if the medium in the steam cylinder is partially in the liquid state, a drain valve communicating with the steamcylinder is opened; and finally, if the medium in the steam cylinder is in the gas state, the drain valve communicating with the steam cylinder is closed. Therefore, by means of the steam turbine drainage control method, the state of the medium in the steam cylinder of the steam turbine can be rapidly and accurately obtained, the drain valve is controlled to be opened or closed in time according to an obtained result, and then the situation that the drain valve is not opened or closed in time and consequently safe operation of the steam turbine is affected is avoided.

The application provides a dehumidifying method and system. The dehumidifying method and system is characterized in that a humidity sensor detects the humidity value of a gas in a control box, a first controller utilizes the humidity value detected by the humidity sensor to control a dehumidifying device to control the humidity of the gas in the control box, so that the drying degree control in the control box of the power transformation equipment is realized, and the problem that the elements in the control box are affected with damp easily to influence the safe operation of the power transformation equipment and cause the frequent power grid accidents is avoided.

The invention provides an insulating oil rapid distinguishing device. The device comprises: a shell, wherein a sample bin is arranged on the shell; a liquid pool arranged in the sample bin and used for placing insulating oil to be detected; an infrared spectrum acquisition unit which is used for acquiring the infrared transmittance graph of the insulating oil to be detected; and a processing unitwhich is electrically connected with the infrared spectrum acquisition unit and is used for receiving the infrared transmittance graph and comparing the infrared transmittance graph with typical spectrograms of insulating oil of different manufacturers and different models so as to determine the model and manufacturer information of the insulating oil to be detected. Insulating oil is sampled andscanned, and a scanning result is compared with the typical atlas of the transformer oil of each manufacturer and each model, so that the model and manufacturer information of the insulating oil to bedetected are determined, the manufacturers and the models of the transformer oil can be quickly distinguished, supply of a high-quality oil source of a high-voltage-grade transformer and safe and reliable use of the transformer oil are ensured, the poor-quality oil source is prevented from influencing safe operation of power grid equipment, and the safety performance of the power grid equipment is improved.

The invention belongs to the technical field of machining, and particularly relates to a three-jaw chuck. The three-jaw chuck comprises a chuck body and clamping jaws, wherein each of the three clamping jaws is formed through the mode that three transverse pressing blocks are adopted to mutually be overlapped and spliced, guiding sliding grooves are formed inside the pressing blocks at the bottommost ends of the clamping jaws, and clamping grooves are formed in the bottom ends of the guiding sliding grooves; sliding blocks are slidably arranged in the guiding sliding grooves, and pressing plates are connected to the bottom ends of the sliding blocks; the pressing plates and the clamping grooves are mutually clamped and matched; threaded locking holes are formed in the sliding blocks; countersunk threaded holes are formed in the vertical directions of the clamping jaws; the countersunk threaded holes are in threaded connection with the threaded locking holes through inside hexagonal bolts; the bottom ends of the threaded locking holes are provided with bearings, and rotating columns are connected in the bearings; and inner hexagonal bolts are arranged in the rotating columns in an inserting mode. The phenomenon that the clamping force of the chuck body to a cylinder is small due to the fact that the diameter of the machined cylinder is different, the cylinder breaks or is damaged under the state that the cutting force is large, and therefore the safe operation of the chuck body is influenced is prevented.

The invention discloses a coke oven ascension pipe crude gas waste heat recycling system. The waste heat recycling system comprises an ascension pipe heat exchanger. The ascension pipe heat exchanger comprises an outer sleeve, and the inner wall of the outer sleeve is connected with an inner sleeve to form a double-sleeve structure. A center pipe is disposed in the center of the inner sleeve. A diffluence and confluence channel is disposed at the bottom of the outer sleeve, the inner sleeve and the center pipe. The inner wall of the inner sleeve and the outer wall of the center pipe are respectively provided with a heating surface. The connecting portion at the top of the outer sleeve and the inner sleeve is provided with a bellows baffling area. The top of the center pipe is provided with a center pipe baffling area. The outer sleeve, the inner sleeve and the center pipe are respectively provided with a spiral backflow channel. On the premise that a coke oven is safely operated and other technology requirements for the crude gas can be met, more than 60% of the crude gas can be recycled by the ascension pipe heat exchanger effectively, the amount of ammonia for cooling the crude gas is reduced, and the amount of poisonous and harmful waste water in the crude gas purifying process is reduced.