117 results about "Hydro generator" patented technology

The utility model provides an overhead digital display wash basin faucet which comprises a main body, a water outlet support arm is arranged at the upper end of the main body, a water outlet nozzle is arranged at the tail end of the water outlet support arm, a concave containing cavity is formed in the upper end of the main body, and a water outlet channel is formed in the center of the bottom of the containing cavity. The water outlet support arm is formed by stamping and welding a thin-wall pipe or a metal plate and is welded and fixed with the main body, an opening is formed in the upper end face of the water outlet support arm, and a mounting cylinder extending towards the accommodating cavity is arranged in the opening; the hydroelectric generator and the temperature adjusting device are mounted in the mounting cylinder. The utility model has the advantages of simple structure, light weight, low production cost and attractive integral appearance.

The present disclosure provides a method, apparatus and system for monitoring ultra-high frequency partial discharge of a hydro-generator, and belongs to the technical field of hydro-generator partial discharge monitoring. The method includes: cleaning a partial discharge pulse sequence using a cleaning threshold to obtain a valid pulse sequence; performing redundant data filtering on each data unit divided from the valid pulse sequence to obtain a first target pulse sequence for short-period partial discharge monitoring; determining sub-sequences that are partial discharge events from the valid pulse sequence, forming a second target pulse sequence after associating an amplitude statistical feature of the sub-sequences, and storing the second target pulse sequence. The aforementioned method combines data cleaning, redundant data filtering, and partial discharge event identification, which enhances the real-time performance of partial discharge monitoring and records the long-period partial discharge change trend. The corresponding system adopts a multi-buffer zone and multi-processor architecture, thus further improving the real-time performance of partial discharge monitoring.

The invention discloses an axial-flow type constant-rotating-speed power output device for a river channel and a hydroelectric generating set, and belongs to the technical field of hydroelectric generation. An axial-flow type constant-rotating-speed power output device for a river channel comprises a constant-speed adjusting assembly and an axial-flow driving assembly which are connected with each other. And a first output shaft of the axial flow driving assembly is connected with the constant-speed adjusting assembly. And the end part of a second output shaft of the constant-speed adjusting assembly is arranged outside the speed adjusting box body in a penetrating manner and is connected with a third connecting flange. A hydroelectric generating set comprises a generator, and the power input end of the generator is connected with a third connecting flange. The self-adaptive constant-speed power output device can be self-adaptive to river water flow changes to achieve constant-speed power output, meanwhile, the problems of impurity blockage and mechanical loss are solved, and finally stable and efficient operation of a generator set is guaranteed.

The utility model provides a hollow waterway type digital display wash basin faucet which comprises a main body, a water outlet support arm is arranged at the upper end of the main body, a water outlet nozzle is arranged at the tail end of the water outlet support arm, the main body is formed by cutting a thin-wall pipe, and the water outlet support arm is formed by stamping and welding a thin-wall pipe or a metal plate and is fixedly welded with the main body; the upper end of the main body is also provided with an isolation cylinder positioned in the water outlet support arm; the outer wall of the isolation cylinder and the inner cavity of the water outlet support arm form a water outlet cavity communicated with the water outlet nozzle; the water outlet pipe penetrates through the main body from bottom to top to reach the isolation cylinder, is fixedly welded with the inner wall of the isolation cylinder and is communicated with the water outlet cavity; the top of the isolation cylinder extends to the top of the water outlet support arm and is provided with an opening, and a display screen is arranged in the opening; a hydroelectric generator and a temperature measuring head connected with the hydroelectric generator are arranged below the main body, and a water outlet of the hydroelectric generator is connected with a water outlet pipe; the device further comprises a temperature adjusting device. The utility model has the advantages of simple structure, light weight, low production cost and attractive integral appearance.

The invention solves the problem that when a filter in an oil tank cooling system is replaced, oil flowing needs to be suspended, and relates to the field of oil tank cooling, in particular to a hydroelectric generator oil tank cooling system which comprises a cooling oil tank motor installed on an oil tank tank and used for circularly feeding oil into a generator, and a plate heat exchanger is installed at the top of the oil tank tank. An oil return pipe connected with the generator is arranged above the plate heat exchanger, a filter used for filtering oil liquid in the stage that the oil liquid in the oil return pipe is conveyed into the plate heat exchanger is installed on the oil tank, the filter comprises a support plate installed on the oil tank, and a flow dividing box in butt joint with the oil return pipe is installed on the support plate. Two filtering assemblies are installed at the bottom of the flow dividing box, and a plugging assembly used for guiding backflow oil liquid to flow into one filtering assembly is installed in the flow dividing box. The two filter assemblies are alternately used, replacement and cleaning are facilitated, and meanwhile the system can work uninterruptedly.

The utility model relates to a multi-energy complementary energy system, which comprises a multi-energy power generation part, a multi-energy complementary converter, an energy storage system and a power grid, the multi-energy power generation part comprises a wind driven generator, a photovoltaic array and a hydroelectric generator; the multi-energy complementary converter comprises two AC / DC rectifiers, a photovoltaic MPPT controller, a bidirectional DC / AC inverter and a DC bus, the two AC / DC rectifiers are electrically connected with the wind driven generator and the hydroelectric generator respectively, the photovoltaic MPPT controller is electrically connected with the photovoltaic array, the energy storage system comprises a bidirectional DC / DC module and a super capacitor, and the super capacitor is connected with the DC bus through the bidirectional DC / DC module; the power grid is connected with the direct current bus through the bidirectional DC / AC inverter; when the system is used for supplying power to the electric equipment, energy conservation and emission reduction can be realized, meanwhile, the power operation cost is greatly reduced, and great economic benefits are brought.

The invention relates to the technical field of hydroelectric generating sets, and discloses an electric speed regulation system and a speed regulation control method for a water wheel power generation and pumped storage unit. The electric speed regulation system comprises a power supply mechanism, a driving mechanism, a transmission mechanism, a stroke detection mechanism and a control mechanism. The transmission mechanism comprises a rotary motion body, a limiting body and a linear motion body, the driving mechanism is connected with one end of the rotary motion body, the linear motion body is slidably arranged in the limiting body, one end of the linear motion body is connected with the rotary motion body, the other end of the linear motion body is connected with a water turbine movable guide vane control ring, and the limiting body is used for limiting rotary motion of the linear motion body. The linear motion body linearly moves in the limiting body; the stroke detection mechanism is suitable for detecting the stroke of the linear motion body; the control mechanism is connected with the power supply mechanism, the driving mechanism and the stroke detection mechanism. The electric speed regulation system is driven by electric power, the unit can be controlled more quickly and more accurately, and the electric speed regulation system is simple in structure, few in fault point and low in maintenance cost.

Disclosed is a self-power-generating digital pressure reducing valve, comprising a main valve (1), and further comprising an electric pressure reducing pilot valve (2). A water inlet port of the electric pressure reducing pilot valve (2) is connected to a water inlet end of the main valve (1) by means of a first pipe (3); a water outlet end of the main valve (1) is connected to a water outlet port of the electric pressure reducing pilot valve (2) by means of a second pipe (4); the water outlet port of the electric pressure reducing pilot valve (2) is connected to an upper diaphragm cavity of a main valve control chamber by means of a third pipe (5); a lower diaphragm cavity is connected to the outside by means of a fourth pipe (15); a fifth pipe (6) is further connected between the water inlet end and the water outlet end of the main valve (1); and a hydroelectric generator (7) is provided on the fifth pipe (6). The digital pressure reducing valve further comprises pressure detection devices (8) arranged before and after the main valve, and a controller for receiving detection signals of the pressure detection devices (8) so as to control the opening and closing of the electric pressure reducing pilot valve (2); and the hydroelectric generator (7) is connected to the pressure detection devices (8) and the electric pressure reducing pilot valve (2). The digital pressure reducing valve can achieve self-power generation to meet power utilization requirements of electric devices, and can be remotely regulated and controlled.

The application discloses a control method for primary frequency modulation in a power dead zone range of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set regulation. The method comprises the following steps: S1, calculating H1 and H2 of a water diversion system according to the water flow inertia time constant of the water diversion system and the mechanical inertia time constant of the generating set; S2, calculating a dynamic analytical expression of the generating set power when a frequency unit step disturbance occurs; S3, calculating a first-order differential link coefficient decomposed by a second-order correction link based on the dynamic analytical expression of the generating set power; and S4, calculating the output of a PID speed regulator in a current sampling period. The scheme calculates the oscillation link transfer function parameters in a dynamic process, and a second-order system correction transfer function of a frequency given value is designed on the basis, so that the oscillation phenomenon of the generating set power does not occur when the frequency given value of the generating set changes, the problem that the power exceeds the power dead zone in the dynamic process is prevented, and a limiting link is arranged at the frequency deviation value to ensure that the power steady-state value exceeds the power dead zone range.

This invention provides a method for predicting the health trend of hydropower units based on the TCN-BiLSTM-Attention model, relating to the field of hydropower generator sets. The method involves: S1: acquiring the original vibration signal of the hydropower generator set and denoising the original vibration signal using a TTAO-VMD-EWT joint denoising model; S2: obtaining multiple operating state parameters of the hydropower generator set and calculating the Pearson correlation coefficient, Spearman correlation coefficient, maximum information coefficient, and distance correlation coefficient between these parameters and the vibration signal; S3: calculating the fusion evaluation index of each operating state parameter and the vibration signal, selecting key features, and constructing a multi-dimensional feature vector together with the reconstructed vibration signal; S4: constructing a TCN-BiLSTM-Attention prediction model to predict and output the predicted trend of the hydropower generator set's vibration signal. This method improves prediction accuracy, increases prediction efficiency, and enhances the accuracy, stability, and timeliness of hydropower generator set vibration trend prediction.

The application discloses a control module applied to a water outlet device, a waterway switching device, the water outlet device and a shower. The water outlet device comprises a switching valve, a control module and a water turbine. The switching valve comprises a valve body, a valve rod and at least two electromagnetic valves. The valve rod is arranged to control the opening and closing of a first water outlet. Each electromagnetic valve is arranged to control the opening and closing of a second water outlet. When all the second water outlets are in the closed state, the valve rod is moved to a position to open the first water outlet. When at least one second water outlet is opened, the valve rod is moved to a position to close the first water outlet. The control module is configured to receive operation information of a user. The operation information is used to control the opening and closing of one of the at least two electromagnetic valves. In response to the operation information, the control module controls one electromagnetic valve corresponding to the operation information to be opened, so that the second water outlet corresponding to the electromagnetic valve is opened. The application can solve the problem that the water outlet device cannot switch the water outlet mode when the water outlet device is just connected to water.

This disclosure discloses a cleaning device for the excitation leads of a hydro-generator, comprising: a traveling trolley for traveling along the length of the excitation lead on the inner wall of the rotor shaft of the hydro-generator, with a cleaning channel formed between the traveling trolley and the inner wall of the rotor shaft, the excitation lead being located within the cleaning channel; multiple brush assemblies, each mounted on the traveling trolley and located within the cleaning channel, with the brush assemblies abutting against the excitation lead; a negative pressure recovery assembly for negatively recovering debris from the excitation lead; and a positive pressure spraying assembly for spraying cleaning agent onto the excitation lead. This cleaning device for the excitation leads of a hydro-generator enables automated cleaning of the excitation leads and achieves high cleaning quality and efficiency.

The utility model belongs to the technical field of mechanical equipment, and discloses a universal tool for machining a hydro-generator rotor magnetic pole pressing plate, which comprises a bottom plate, a carrier plate arranged on the bottom plate, a limit groove arranged on the carrier plate, sliders slidably connected to two ends of the limit groove, a bidirectional threaded rod rotatably connected in the limit groove, and a threaded rod connected with the bidirectional threaded rod. The two threaded sections of the bidirectional threaded rod are in threaded connection with the corresponding sliding blocks respectively, one end of the bidirectional threaded rod is connected with a rotating shaft extending out of the carrying plate, the rotating shaft is connected with a rotary knob, and the axis of the bidirectional threaded rod and the connecting line of the circle centers of the two inclined through holes in the magnetic pole pressing plate to be machined are located on the same vertical plane. The second threaded holes are provided with fixing mechanisms in a matched mode, and the fixing mechanisms are used for fixing the magnetic pole pressing plate to be machined to the carrying plate. The universal tool can be used for machining magnetic pole pressing plates of different specifications, and is higher in applicability, lower in manufacturing cost and higher in manufacturing precision.

A water powered generator is disclosed comprising: a turbine 102 and a water tank 104 arranged for relative movement with each other. At least one activator tank 106 is coupled to the water tank and / o

To provide a hydroelectric power generation mechanism that can utilize energy with high efficiency. [Solution] The hydroelectric power generation mechanism comprises a first-shaft turbine having a first rotor with first rotor blades on its outer surface and a hollow first rotor connected thereto, a second-shaft turbine having a second rotor with second rotor blades on its outer surface and a second rotor connected thereto and arranged coaxially with the first-shaft turbine, and a generator. In this hydroelectric power generation mechanism, the first rotor blades are positioned upstream of the second rotor blades in an annular flow path, the generator is positioned upstream of the first-shaft turbine, a planetary gear mechanism is positioned between the generator and the first-shaft turbine, the gear at the end of the first rotor meshes with an internal gear, the second rotor is connected to a planetary carrier, and the input shaft of the generator is connected to a sun gear. During operation, the first and second rotors rotate in the same direction, and the second rotor rotates at a lower rotational speed than the first rotor.

The application discloses a kind of river with axial flow constant speed power output device and hydroelectric generator unit, belong to the technical field of hydroelectricity generation.A kind of river with axial flow constant speed power output device, including mutually connected constant speed adjusting assembly and axial flow drive assembly.Axial flow drive assembly first output shaft is connected with constant speed adjusting assembly.Constant speed adjusting assembly includes the second output shaft end portion is worn to the speed regulating box body outside and is connected with third connecting flange.A kind of hydroelectric generator unit, including generator, and the power input end of generator is connected with third connecting flange.The application can adapt to river flow variation and realize constant speed power output, and at the same time solve the problem of impurity blockage and mechanical loss, finally guarantee the stable and efficient operation of generator unit.

A closed bus structure for a hydropower generator, characterized in that it comprises: a closed bus body, wherein the closed bus body comprises an outer shell and a bus conductor, wherein the outer shell is provided with a chamber, the bus conductor is arranged in the chamber and is spaced apart from the chamber wall; a mounting bracket comprising a first mounting section and a second mounting section, wherein the first mounting section is guided through the outer shell and is spaced apart from the bus conductor, wherein the first mounting section is connected to the outer shell, and wherein the second mounting section is magnetically connected to an end of the first mounting section facing away from the bus conductor;an optoelectronic detection device which is guided through the first assembly section and the second assembly section and arranged at a distance from the bus conductor, wherein the optoelectronic detection device is connected to the second assembly section.

The invention discloses a large-scale hydroelectric generator stator winding confluence copper ring arrangement scheme solving algorithm, which focuses on the NP complete problem of large-scale hydroelectric generator stator confluence copper ring arrangement, and aims at the pain point of low manual design efficiency caused by complex constraints, and the core is to establish a mathematical model of five types of constraints of a wire clamp. And designing a greedy algorithm and an improved DFS algorithm combined with the greedy algorithm to realize automatic generation of a convergence scheme. The greedy algorithm is suitable for a small-scale motor, and local optimum is rapidly obtained; the improved DFS algorithm obtains a reference value through greedy, the search range is narrowed, the large-scale motor solving efficiency is improved, and the target is to minimize the total length of a copper ring. Through testing of two motors with different parameters, the length of a copper ring in a solution scheme is closer to an ideal value than that in an original winding scheme, the solution speed is superior to that of a pure DFS, and support is provided for automation and intellectualization of motor design.

The application discloses a dry hot rock heat utilization system for combined heat and power generation and belongs to the technical field of power generation. The technical scheme is as follows: a water filtering device is arranged, a water inlet pipe of the water filtering device is connected with a water pool, a water outlet is connected with a siphon pipe, and an electromagnetic valve is arranged on the water inlet pipe, the water inlet end and the water outlet end of the siphon pipe; the siphon pipe is connected with a water guide bucket through a water guide pipe, the water guide pipe is connected with an exhaust pipe, and an electromagnetic valve is arranged on the water guide pipe and the exhaust pipe; the siphon pipe is inserted into a vertical shaft, and multiple water power generation mechanisms are arranged below the water outlet of the siphon pipe along the vertical shaft height direction; the water power generation mechanism comprises a water turbine generator, a water falling bucket is arranged below the water turbine generator, a water falling pipe is connected with the water outlet of the water falling bucket, and the water turbine generator is connected with a power transmission and transformation device through a cable. The application realizes the coupling of dry hot rock heat collection and gravity potential water power generation by using the siphon principle, the whole production process does not need external energy input and pump transportation, zero-carbon combined heat and power generation can be realized, and the energy consumption is greatly reduced.

A mirror plate defect repairing method for a large hydroelectric generator set, comprising the following steps: S1. performing flaw detection on the original defect part of the mirror plate to determine the defect position; S2. cleaning the defect; S3. performing flaw detection inspection on the cleaned area; S4. performing welding repair by using laser cladding technology; S5. polishing the welding repaired part to be flat and performing dye penetrant inspection; S6. after no defect is found in the flaw detection, performing heat treatment on the cladding area by using laser to adjust the hardness of the cladding area; and S7. performing honing processing on the working surface of the mirror plate. Through the method, the parallelism and roughness quality of the mirror plate after the repairing and finishing can meet the industry standards, and the repaired mirror plate can meet the safe and stable operation requirements. The service life of the mirror plate is prolonged, and compared with directly replacing the mirror plate, the method has great advantages, the repairing period is shorter, the repairing cost is lower, and great economic benefits are brought to early power generation of the generator set.

The present invention relates to a micro hydroelectric generator, comprising a turbine wheel chamber arranged within a pipeline, and a generator set arranged on one side of the turbine wheel chamber. The generator set comprises a housing, and a stator and a rotor that are arranged inside the housing. The rotor comprises a turbine wheel and a rotating shaft arranged at the center of the turbine wheel. One end of the turbine wheel is provided with a permanent magnet, and the other end is provided with blades. The end provided with the permanent magnet corresponds to the stator, and the end provided with the blades is arranged within the turbine wheel chamber. The blades rotate within the turbine wheel chamber to drive the rotor to rotate. The turbine wheel chamber is connected to a water inlet and a water outlet of the pipeline. The inner wall of the turbine wheel chamber comprises two concentric circular arcs having different radii, and a connecting arc that connects the two concentric circular arcs. A cavity for accommodating water flow is formed between the inner wall of the large-radius circular arc of the turbine wheel chamber and the blades. The present micro hydroelectric generator can fully utilize kinetic energy of water and thus has high power generation efficiency.

The side-inlet bottom-outlet water flow sensing valve comprises a valve body, a base and a battery box, the valve body comprises a circuit board wiring cavity and a water flow thrust cavity, a partition plate is provided with a guide column, and a temperature sensor mounting hole is formed in the partition plate; a circuit board in the circuit board wiring cavity is provided with a water flow switch and a temperature sensor, the circuit board is electrically connected with a power supply waterproof plug and an output electrical equipment wire plug, the side wall of the water flow thrust cavity is provided with a plurality of water inlets, and the base is provided with a water outlet; the inner end of the guide column is sleeved with a magnet assembly, the outer end of the guide column is sleeved with a reset spring, and the bottom of the magnet assembly right faces the water outlet of the base. Movement of the magnet assembly becomes more stable, use reliability and installation convenience are improved, and the magnet assembly is used on a shower device or a faucet device and can be connected with a digital display screen or / and an atmosphere lamp strip. The installation size is the same as that of a miniature hydroelectric generator for sanitary products, and the miniature hydroelectric generator can be used for replacing an original hydroelectric generator.

The invention discloses a stator coil automatic transposition forming device and a transposition forming method, and belongs to the technical field of hydroelectric generator stator coil manufacturing. The problems that at present, manual transposition of the stator coil easily causes certain damage to surface insulation of the flat copper wires, the insulation performance between every two adjacent flat copper wires is reduced, and manual transposition forming efficiency is low are solved. The transposition device, the forming device and the feeding device are sequentially arranged on the workbench in the feeding direction of the stator coil, transposition of the stator coil composed of an upper flat copper wire layer and a lower flat copper wire layer in the horizontal direction and the vertical direction is completed through the transposition device, and the single flat copper wire of the stator coil is pressed into an S bend shape through the forming device. And the stator coil is clamped by the feeding device to circularly move according to a fixed transposition pitch distance. According to the automatic transposition forming device and method for the stator coil, automatic transposition forming of the stator coil is achieved, efficiency is high, forming quality consistency is good, popularization is easy, and universality is high.

The utility model provides a multifunctional shower. The multifunctional shower comprises a water inlet module, a temperature control module and a multifunctional module. The water inlet module is connected with a hot water port and a cold water port. The temperature control module adjusts the water temperature and then guides the water temperature to the multifunctional module. The multifunctional module comprises a shell, a key valve element, a connecting cavity and a plurality of water outlet cavities, the communicating state of the water outlet cavities and the connecting cavity is controlled through the key valve element, and water outlet ends with different functions are arranged. The shell can also be provided with a cold discharge port, a cold discharge electromagnetic valve and a hydroelectric generator, so that multiple functions of energy conservation, cold discharge, power generation and the like are achieved. Through modular design and flexible waterway control, a user can freely match waterway combinations, diversified requirements are met, the development and production cost is remarkably reduced, the use convenience is improved, and the application range is widened.

The utility model provides a sealed waterproof miniature hydroelectric generator. The sealed waterproof miniature hydroelectric generator comprises a casing; a base; the driving unit is rotationally arranged in the machine shell and comprises a rotating shaft and an impeller for driving the rotating shaft to rotate, and the impeller is connected to one end of the rotating shaft; the power generation unit comprises a magnetic ring and a coil assembly, the magnetic ring is fixedly arranged outside the rotating shaft and synchronously rotates with the rotating shaft, the coil assembly is fixedly arranged in the machine shell, the machine shell is screwed on the base through threads, a sealing ring is arranged at the joint of the base and the machine shell, the impeller is suspended in the base, a water inlet end cover is arranged outside the impeller, and the lower end of the machine shell is sleeved with the water inlet end cover; a sealing ring is arranged between the water inlet end cover and the machine shell, a sealing ring is arranged between the water inlet end cover and the base, good sealing performance is guaranteed due to the arrangement of the sealing rings among the components, water flow can be prevented from permeating into the machine shell to affect normal work of the generator, and water quality can be prevented from being polluted.

The invention relates to the technical field of hydroelectric generating sets, and discloses an energy collecting device for a hydroelectric generating set, which comprises a stator and a rotor which are coaxially arranged, the stator core is wound with an excitation coil, the excitation coil is used for introducing excitation current to generate a magnetic field, the rotor is fixedly provided with an L-shaped coil, and the coverage range of the L-shaped coil extends from the axis of the rotor to the edge of the rotor. When the rotor rotates, the L-shaped coil is driven to rotate to cut magnetic lines in the magnetic field to generate induced electromotive force; two ends of the L-shaped coil are respectively connected with a central slip ring and an edge slip ring, and the central slip ring and the edge slip ring are respectively connected with the same rectification energy storage module. According to the invention, the energy collection range can be expanded, and electromagnetic energy in a non-main magnetic flux path can be collected and utilized.

The utility model relates to a power generation floor, in particular to a pressure trigger type power generation floor which comprises a box body, a cover plate, a water pressing device, a miniature hydroelectric generator, a one-way water outlet valve and a three-way pipe, the cover plate is arranged on the box body in a sliding mode, a through hole is formed in one side of the box body, and the water pressing device and the miniature hydroelectric generator are installed at the bottom in the box body. A one-way water outlet valve is connected between the input end of the micro hydroelectric generator and the water pressing device, and the output end of the micro hydroelectric generator is connected and communicated with a three-way pipe. When a pedestrian steps on the cover plate, the feet of the pedestrian tread on the cover plate, liquid circulates in the water pressing device, the one-way water outlet valve, the three-way pipe, the water storage ball, the one-way water inlet valve and the miniature hydroelectric generator, a turbine of the miniature hydroelectric generator rotates to generate electricity to generate electric energy, and under the action of the guide rod, the supporting plate and the elastic piece, when the water pressing device loses elasticity, the cover plate can be kept flush, so that the water pressing device is protected. Pedestrians are prevented from treading on the cover plates and being stumbled due to non-uniform height of the cover plates, so that potential safety hazards are reduced.

This application provides a data-driven method and apparatus for identifying ultra-high frequency partial discharge (UHF) signals from hydro-generators, belonging to the field of partial discharge monitoring technology. The method includes: acquiring monitoring signals collected by a coupling device; discretizing the monitoring signals to obtain an amplitude sequence; inputting the amplitude sequence into a pre-built signal diagnostic model to generate a diagnostic result indicating whether the hydro-generator is operating normally; if the diagnostic result indicates an abnormal operating state of the hydro-generator, extracting a first feature of the monitoring signal; if no interference signal corresponding to the first feature is found in a pre-built background noise database, extracting a second feature of the monitoring signal; and using the second feature to match the UHF event corresponding to the second feature from a pre-built UHF case database. The first feature includes energy characteristics, and the second feature includes time-domain and / or frequency-domain characteristics. This method combines data-driven approaches, a background noise database, and a UHF case database to achieve rapid and accurate identification of UHF signals.

The invention discloses an online monitoring device and method for a bolt state in a hydroelectric generating set. The device comprises a plug-in data acquisition device, a data transmission module and an upper computer, wherein the transmitting end and the receiving end of the data acquisition device are respectively arranged at the upper end and the lower end of a bolt to be monitored in the hydroelectric generating set, and are used for monitoring the internal stress change of the bolt on line; the data transmission module is used for transmitting the internal stress change data, monitored on line, of the bolt to the upper computer; and the upper computer is used for processing and analyzing the internal stress change data, judging whether the bolt has defects or not by analyzing the signal characteristics of the ultrasonic signals, and determining defect types and defect parameters according to the abnormal signal characteristics. The device can realize on-line detection of important bolts in a hydroelectric generating set, judges whether defects are generated or not according to internal stress changes, can realize on-line monitoring of the important bolts in a running state of the generating set, and provides data support for subsequent maintenance of the generating set.

The utility model provides a bathroom spray gun, and belongs to the technical field of bathrooms. The water temperature display device solves the problem that assembly is inconvenient for achieving water temperature display. A push button is further arranged outside the shell, a water inlet body and a water passing body are arranged in the shell, the water inlet body and the water passing body are fixed in an inserted or clamped mode, the opening and closing piece is arranged between the water inlet body and the water passing body in a front-back sliding mode, the digital display module is fixed to the side portion of the water passing body, and the hydroelectric generator is fixed in the water inlet body. The opening and closing piece is in a cylinder shape with two open ends, is provided with a step-shaped inner hole with the front portion larger than the rear portion and is connected to the front end of the water inlet body and the rear end of the water passing body in a sleeved mode at the same time. The first sealing ring is located in front of the water outlet and abuts against the rear hole wall of the step-shaped inner hole to form sealing, a strip-shaped receding groove is formed in the side portion of the shell in the front-back direction, and the push button penetrates through the receding groove and is fixed to the opening and closing piece. The device has the advantages of convenience in assembly and the like.