95results about How to "Reduce unplanned downtime" patented technology

The invention relates to a power station boiler diagnosis expert system and a fault diagnosis method thereof and aims to solve the problems that currently the operation fault causes of a thermal powerplant are not visual, the number of the parameters and state variables monitored by the system of the thermal power plant can reach hundreds and thousands, and fault position finding from the thousands of measuring parameters, state variables and alarm information is quite difficult. The power station boiler diagnosis expert system comprises a DCS data collecting system module which is mounted ona boiler unit and used for collecting boiler parameters and is characterized in that the DCS data collecting system module is connected with a real-time database system module, the real-time databasesystem module is connected with an overlimit alarm module, the overlimit alarm module is connected with a fault diagnosis module, and the fault diagnosis module is connected with a diagnosis knowledge database module, a fault symptom database module, a knowledge database updating module, a fault predicting diagnosis module and a user interface module. The power station boiler diagnosis expert system is applicable to power station boiler diagnosis.

The invention discloses an equipment fault diagnosis method and device. The method comprises the steps that acquiring noise data and vibration data of the surface of equipment; obtaining a corresponding data curve according to the noise data and the vibration data; judging whether the data curve is consistent with a model base line when the equipment runs normally or not, and if not, generating abnormal information; judging whether the abnormal information is fault information or not; if the abnormal information is fault information, marking the abnormal information as the fault information; and if the model base line is not the fault information, performing machine learning on the model base line and the data curve to obtain a new model base line. A fault diagnosis and prediction solutionbased on a local edge side system and through noise and vibration is constructed; continuous monitoring of equipment faults can be achieved only by detecting equipment noise and vibration data, and therefore accidental shutdown in the industrial production process is further reduced, the product yield is increased, and the industrial production cost is reduced.

The invention discloses a steam turbine governing valve redundancy control system and a control method thereof. Redundant distributed control units and redundant valve positioner modules are combined to control steam turbine governing valves. The distributed control units are arranged in pairs, the current valve position instruction signals of the steam turbine governing valves are calculated in real time to be sent to the valve positioner modules. The valve positioner modules are arranged in pairs, feedback signals of two different steam turbine governing valves are collected at the same time, the valve position instruction signals sent by the distributed control units are combined with the feedback signals, the instruction signals of a current governing valve servo valve are calculated and output to drive two coils of hydraulic servo-motor servo valves corresponding to the two governing valves, closed loop control over the steam turbine governing valves is achieved, the two coils of the hydraulic servo-motor servo valves corresponding to each steam turbine governing valve are respectively controlled by adopting the two valve positioner modules which are arranged in pairs, safety of valve control of a steam turbine is improved greatly, and on-line non-stop and interference-free renewing of the valve positioner modules can be achieved.

The invention relates to a controlling method of delaying water leakage of a pinch roll, comprising the steps as follows: (1) when an intermediate blank head of rough rolling incoming materials arrives at a flying shear zone, a photoelectric tube in front of the flying shears is triggered and turned on to transmit the detected signal to BA basic automation, and the flying shears carry out the head cutting according to the shape of the detected intermediate blank head; (2) the pinch roll is controlled by low pressure: after the head of the intermediate blank is cut, the intermediate blank goesinto a de-scaling box 1#pinch roll at a de-scaling roller-way speed; and based on the days of the pinch roll using the computer and low pressure control pressure setting, a BA computer calculates thehead setting pressure according to the formula 1 and then roll gap is pressed until the pressure reaches the set value; (3) the pinch roll is controlled by high pressure: when the tail of the intermediate blank reaches the number 1 photoelectric tube, the pinch roll is controlled by high pressure; and based on the days of the pinch roll using the computer and high pressure control pressure setting, a BA computer calculates the tail setting pressure of the pinch roll according to the formula 2 and then the roller gap is further pressed until the pressure reaches the set value. The invention has the advantages of increased production operation efficiency, reduced fault time, and prolonged using periods of various pinch rolls.

The invention discloses a remote intelligent monitoring system for petrochemical key unit equipment in the technical field of petrochemical engineering. The system comprises a data collection subsystem which is used for collecting original data and transmitting the original data to an on-site monitoring subsystem; the field monitoring subsystem is used for integrating the existing monitoring data,configuring a targeted data acquisition method according to the operation characteristics of the equipment unit, capturing, analyzing and positioning effective vibration and temperature data of the equipment unit fault through the data acquisition subsystem, and giving an intelligent alarm according to an output instruction of the remote diagnosis subsystem; remote diagnostic subsystem, the system is used for carrying out remote data analysis and fault diagnosis on an equipment unit monitored by an on-site monitoring subsystem. The problem of data acquisition is solved by setting up the Internet of Things through arrangement of sensors, and data sharing and analysis are performed by applying a large number of intelligent algorithms, so that the risks of equipment loss and repair loss areeffectively reduced. The unplanned shutdown is reduced. The availability of parts is improved. The spare part management is efficient, and the operation efficiency is improved.

The invention discloses a ship propulsion motor online vibration monitoring system. The ship propulsion motor online vibration monitoring system is characterized by comprising a motor rotation speed sensor, a three-shaft acceleration sensor, a signal collection module and an upper computer; the motor rotation speed sensor is installed on an end cover of the motor for detecting the rotation speed of the motor in real time; the three-shaft acceleration sensor is directly installed on a motor seat of the motor for detecting vibration accelerated speeds in an axial direction (X), a radial direction (Y) and a vertical direction (Y) and converting a vibration accelerated signal to an accelerated speed electric signal; the signal collection module is connected to a motor rotation speed sensor and a three-shaft acceleration sensor and is used for collecting and transmitting the rotation speed electric signal and the accelerated speed electric signal; a database is installed on the upper computer and the upper computer is used for comparing the rotation speed electric signal and the accelerated speed electric signal with information in the database through operation after receiving the rotation speed electric signal and the accelerated speed electric signal, and diagnosing that whether the motor is currently in a fault coverage.

The invention discloses a vibration signal detection and fault diagnosis system in the shield tunneling process. The vibration signal detection and fault diagnosis system comprises a signal processing center host module which comprises a power module, a CPU module unit connected with the power module, an A/D conversion module, a probe interface module, a display screen module, a signal conditioning unit module, an operating keyboard, a storage module and a power interface module, wherein A/D conversion module, the probe interface module, the display screen module and the signal conditioning unit module are connected with the CPU module unit, and the operating keyboard, the storage module and the power interface module are connected. Clutter signals in the underground tunneling process of a shield can be effectively removed, shield vibration signals which are truer and cleaner can be collected and analyzed, the vibration state of shield tunneling can be reflected truly, and therefore fault signals can be analyzed and evaluated. The system is fast in detection response, good in ration, low in cost, convenient to operate, capable of carrying out early warning and detecting on faults in the underground tunneling process of a shield assembly, reduces unplanned shut-down caused by the faults, reduces economic loss, and has great economic benefits and social benefits.

The invention discloses a preparation process for a composite wear-resistant coating which can be used for repairing and reconstructing all local defects, caused by conveying fluid materials, of associated metal parts. The preparation process comprises the following steps: by taking a processed metal surface as a base and taking a molded metal or nonmetal structure frame as an insert, painting a high polymer composite material layer on the scene to form an integer, wherein the high polymer composite material layer consists of three coatings with different properties, which are respectively a composite material bottom layer, a wear-resistant corrosion-resistant functional layer and a surface coating. The preparation process disclosed by the invention adopts a coating process, is not limited by a shape of a mould, is widely suitable for various complex mould surfaces and relatively low in total cost, and can be used for flexibly designing out composite wear-resistant coating structures of various shapes for different working conditions.

The invention discloses a method for determining a position of a crack of a fan blade. The method comprises S1, establishing a database of fan blade failure by simulation, S2, measuring first few order natural frequencies of an actual blade to be detected, and S3, inputting the actual blade data measured in the step S2 into the fault database established in the step S1, and detecting the crack position of the actual fan blade. The method uses a simulation method to compute the position of the blade crack, not only realize timely diagnosis of the fan blade crack, but also realize quantitative analysis of the crack position of the fan blade, has a fast diagnosis speed, produces a reliable result and provides a strong guarantee for the equipment maintenance.

The invention provides a rolling mill stand roller replacing device. The device comprises a crane capable of going into and out of a rolling mill, and the traveling track of the crane is parallel to aroller shaft of a stand roller to be replaced; a supporting beam is arranged on a base of the crane, and is provided with a sliding rail which allows a supporting frame to horizontally slide along the sliding rail, the sliding rail is perpendicular to the traveling track of the crane, and a suspension beam is arranged at the top of the crane; and the device further comprises the supporting framewhich can be placed in the rolling mill and is supported by the supporting beam of the crane entering the rolling mill, lifting lugs or hanging holes are formed in the peripheral ends of the supporting frame; and a supporting rotating shaft with changeable rotating positions is arranged at the position, opposite to the supporting frame, of the supporting beam, and an avoiding space capable of preventing interference with guide and guard plates in the rolling mill is formed in a frame body of the supporting frame.

The invention belongs to the technical field of compressors, and particularly relates to a fault diagnosis instrument for a diaphragm compressor. An existing compressor fault monitoring device cannotcomprehensively monitor a diaphragm compressor and cannot timely obtain the operating parameters of the diaphragm compressor to perform health monitoring and fault diagnosis on the diaphragm compressor. The fault diagnosis instrument for the diaphragm compressor comprises a fault monitoring module, a signal acquisition module, a data processing module, a display interaction module and a power supply module which are sequentially connected. The fault monitoring module is connected with the power supply module, the signal acquisition module is connected with the power supply module, the data processing module is connected with the power supply module, and the display interaction module is connected with the power supply module. Operation state monitoring and fault diagnosis of the diaphragmcompressor are achieved.

The invention belongs to the technical field of thermal power plant boiler auxiliary equipment and relates to an ammonium bisulfate deposition prevention five-chamber rotary preheater and an operationmethod thereof in order to solve the technical problem that an existing air preheater is blocked by ammonium bisulfate easily. The air preheater is internally provided with an air preheater rotor. Aheat exchange element is arranged on the air preheater rotor. The air preheater internally comprises an exhaust gas side and air sides. The air sides include the air side I, the air side II, the air side II and the air side IV. An inlet of the air side I is connected with an inlet of the exhaust gas side through a pipeline. A high-temperature fan I is arranged between the inlet of the air side I and the inlet of the exhaust gas side. An outlet of the air side IV is connected with an inlet of the air side IV through a pipeline. A high-temperature fan II is arranged between the outlet of the airside IV and the inlet of the air side IV. A steam soot blower is arranged at the cold end of the air side II. An acoustic soot blower is arranged at the cold end of the air side III. Under the full-load working condition, the phenomenon of blockage of the ammonium bisulfate deposition prevention five-chamber rotary preheater can be effectively relieved on line, and the frequency of non-planned shutdown of the air preheater can be reduced.

The invention relates to a boiler pipe bundle deformation preventing device and a using method and application thereof. The boiler pipe bundle deformation preventing device comprises a left side clamping plate assembly and a right side clamping plate assembly which are parallel to each other. The left side clamping plate assembly comprises a left outer side clamping plate, a right outer side clamping plate and a left middle side clamping plate. The right side clamping plate assembly comprises a right middle side clamping plate, a left inner side clamping plate and a right inner side clamping plate. Centers of plate bodies of the left outer side clamping plate, the right outer side clamping plate, the left middle side clamping plate, the right middle side clamping plate, the left inner sideclamping plate and the right inner side clamping plate are provided with a plurality of arc portions correspondingly, wherein the arc portions are parallel and are used for storing pipe bundles. Thedevice further comprises a series-connection pin plate. The left side clamping plate assembly is fixedly connected with the right side clamping plate assembly through the series-connection pin plate.The boiler pipe bundle deformation preventing device has the advantages of being reasonable in structural design, stable and reliable in performance and the like, displacement of single pipes of the pipe bundles can be controlled effectively, and the situation that due to mutual friction between the pipe bundles, the pipe wall is thinned, pipe burst is generated, and safety operation of a boiler is influenced can be avoided.

The invention provides a rapid replacing system for an air pre-filtering device, and relates to the technical field of air inlet systems of gas turbines and industrial compressors. The rapid replacingsystem comprises a pre-filtering device, wherein a pre-filtering module is arranged on the surface of the pre-filtering device, a supporting component is embedded in the bottom of the side surface ofthe pre-filtering device, and a lifting mechanism is arranged at the bottom surface of the pre-filtering device. The pre-filtering element can be quickly replaced on line without stopping; the replacement is simple, the labor intensity is low, the operation environment is excellent, and no additional tool or fixture is needed; and the pre-filtering element shares the filtering burden of a downstream filter, prolongs the service life of the downstream filter with high purchase cost, reduces the frequency of unplanned stoppage, and improves the reliability and economical efficiency of machine operation.

The invention provides a scale inhibitor for inhibiting scale formation on a flue gas turbine blade. The scale inhibitor comprises the following components by mass percentage: 20%-30% of aqua ammonia, 20-30% of a hydrazine hydrate aqueous solution, 10-20% of an alkali metal hydroxide, and the balance deionized water. The aqua ammonia concentration is 25-37%, the concentration of the hydrazine hydrate aqueous solution is 40-80%, and the alkali metal hydroxide can be sodium hydroxide or potassium hydroxide. With application of the scale inhibitor, the formation of scale in a flue gas turbine can be effectively reduced, a series of scale removal problems after the flue gas turbine is scaled are reduced or eliminated, and economic losses caused by equipment damage and non-scheduled work stopping are reduced.