41results about How to "Prevent overhaul" patented technology

The invention discloses a device for reinforcement, energy dissipation and seismic mitigation of a tenon and mortise joint of a timber structure. The device for reinforcement, energy dissipation and seismic mitigation of the tenon and mortise joint of the timber structure comprises a wood beam, a wood pole, the tenon and mortise joint, embedded steel bars, joint connecting pieces and joint fastening pieces, wherein the wood beam is connected with the wood pole through the tenon and mortise joint, conduits are formed in the upper end surface and the lower end surface of the wood beam or in the two lateral surfaces of the wood beam respectively, the embedded steel bars are embedded in the conduits in advance, the conduits are sealed through small battens and special structural adhesive, one end of each joint connecting piece is connected with a corresponding embedded steel bar, the other end of each joint connecting piece is connected with a corresponding joint fastening piece, and the joint fastening pieces penetrate through the pole body of the wood pole and are fixed on the side, back on to the wood beam, of the wood pole through anchor plates and cushion blocks. The device for reinforcement, energy dissipation and seismic mitigation of the tenon and mortise joint of the timber structure is high in bending resistance, energy-dissipation capacity and ductility, and capable of guaranteeing stability of the structure under the small earthquake condition, achieving serious deformation under the large earthquake condition to control structural damage, and achieving automatic restoration of the structure after an earthquake.

The invention discloses a valve remote fault diagnosis system based on the IOT (Internet of Things) technology. An intelligent valve terminal communicates with main control equipment through a zigbee network, and the main control equipment communicates with a remote monitoring platform through the Internet. The intelligent valve terminal comprises a sensor module, a data collection module for collecting a sensor signal, and a zigbee module for sending the signal. The main control equipment comprises a zigbee module for receiving a zigbee network signal, and a GPRS module for transmitting the signal. The remote monitoring platform comprises a database module, a real-time display module for the real-time display of the data, and an alarm module. The sensor module comprises a pressure transmitter, a valve rod position sensor, a temperature transmitter, a VOCs sensor, and a valve rod torque sensor. The system is low in cost, is high in practicality, and is high in efficiency.

The invention provides a wind power plant equipment state evaluation and maintenance decision support detection method. The method comprises the steps of (1) collecting and analyzing information whichcomprises technical data related to equipment patrol records, fault statistics and equipment running conditions; (2) performing charged detection: effectively monitoring a running state of wind powerplant equipment through the data collected by an instrument, and performing fault detection and prevention; (3) implementing state maintenance of a decision making system: by collecting and analyzingrunning data of the equipment, carrying out state evaluation work on the equipment to determine whether the equipment needs to be maintained or not and maintenance items; and (4) establishing an equipment pre-test maintenance optimization scheme: by implementing the state maintenance of the wind power plant equipment and the charged detection of the equipment, performing state evaluation on the equipment according to wind power plant equipment state evaluation rules, and customizing a maintenance policy. The invention furthermore discloses a corresponding detection system. The maintenance test cycle is prolonged, and maintenance test items are optimized, so that the maintenance test expense is reduced, excessive maintenance and lacking maintenance of the equipment are prevented, and the equipment stability is further improved.

The invention provides the state test method of wind power plant equipment live detection. The method comprises the following steps of (1) carrying out live detection: using an apparatus to collect data, implementing the live detection combining ultrasonic partial discharge detection and ultraviolet imaging detection, monitoring the operation state of wind power plant equipment, and carrying out fault detection and prevention; (2) constructing decision system state overhauling: collecting and analyzing the operation data of the equipment, and carrying out state evaluation work on the equipmentso as to determine whether the equipment needs overhauling and determine overhauling items; (3) establishing an equipment pre-test overhauling optimization scheme: through wind power plant equipmentstate overhauling, combining the implementation of equipment live detection, according to a power plant equipment state evaluation rule, carrying out state evaluation on the equipment, and making a customized overhauling strategy. The invention also discloses a corresponding detection system. A live detection method combining the ultrasonic partial discharge detection and the ultraviolet imaging detection is adopted, a test project is optimized and pre-test overhauling cost is saved.

The invention discloses a self-rearranging mortise and tenon joint which comprises a wooden beam, a wooden column, a mortise and tenon joint body between the beam and the column and a prestress rib. The wooden beam and the wooden column are connected through the mortise and tenon joint body. The prestress rib penetrates through the wooden beam and the wooden column in the longitudinal direction of the wooden beam. The end portion of the prestress rib is fixed on one side, with the back toward the wooden beam, of the wooden column through an anchor plate, an anchor pad plate and an anchor. The self-rearranging mortise and tenon joint has the ideal advantages that strong bending-resistant capacity and energy-consuming-resistant capacity are achieved, the joint can guarantee structure stability under low quake, structure deforms greatly and structure damage is controlled under high quake, and structure self-rearranging effect is achieved after quake.

The invention relates to a sand protection matching pipe string for a high-throughput sand filter pipe. The sand protection matching pie string comprises a packer, a conversion coupling, a high-throughput sand filter pipe and a time delay self-locking valve or plug, wherein the conversion coupling is connected with the packer and is arranged at the back end of the high-throughput sand filter pipe, and the time delay self-locking valve or plug is arranged at the front end of the high-throughput sand filter pipe; high-throughput sand filter units are sequentially connected by a double-male left-hand coupling end to end to form the high-throughput sand filter pipe, and a high-temperature resistant broken centralizer is arranged on the outer surface of the middle of the double-male left-hand coupling; and a broken bracket is arranged between the high-temperature resistant broken centralizer arranged on the outer surface of the double-male left-hand coupling and the high-throughput sand filter unit. The high-temperature resistant broken centralizer can ensure that the high-throughput sand filter pipe is positioned at the center of a shaft, so that formation fluid evenly supplies fluid to a sand filter from the shaft, and meanwhile, the wear of the shaft to the sand filter in the logging process is reduced, the success rate of logging is ensured, the breaking is easy, and the replacement operation is not affected.

The invention discloses an enterprise energy efficiency management system and a management and control method therefor, and belongs to the field of energy management. The system comprises an information collection unit, an information processing unit, a control unit, and an operation unit. The information collection unit, the information processing unit, the control unit and the operation unit are sequentially connected. The information collection unit comprises an information automatic collection module and a communication module, wherein the information automatic collection module is connected with a computer DCS system of the operation unit through the communication unit. The information processing unit comprises a data calculation module, a data comparison module and a data analysis module. The control unit comprises a factory-level scheduling command system module, a production plan cost check module, an equipment energy consumption economical efficiency diagnosis module and an equipment state diagnosis module. The system can find hidden or exposed various problems, which affect the high-efficiency utilization of energy sources, at the links of enterprise resource production, conveying, transfer, distribution and consumption in a thermodynamic system, can carry out the diagnosis and analysis of the problems and provides processing suggestions.

The invention discloses a power equipment maintenance system and method based on artificial intelligence, and belongs to the field of deep learning. The method comprises the steps of collecting the material of the power equipment, calculating the fault rate of the power equipment, carrying out initial scoring on the power equipment according to the fault rate of the power equipment, outputting a power equipment evaluation value, evaluating the operation state of the power equipment, and evaluating the operation state of the power equipment according to the power equipment evaluation value and the operation environment of the power equipment. Adjusting the maintenance cycle of the power equipment according to the operation state of the power equipment; according to the method, the operation state of the power equipment is evaluated from two aspects of the probability of possible faults of the power equipment and the influence of the operation environment of the power equipment on the power equipment, the maintenance period of the power equipment is adjusted according to the operation state of the power equipment, and the maintenance period is reasonably configured; the method can timely check the power equipment which is liable to have fault hidden troubles, nip in the bud, avoid overhauls and blind maintenance, and reasonably distribute maintenance resources.

The invention relates to a sand-loosening type petroleum downhole safety connector. According to the technical scheme, the sand-loosening type petroleum downhole safety connector comprises an upper connector and a lower connector, the lower connector is connected on the lower portion of the upper connector, and the outer side of the upper connector is sleeved with a sealing steel sleeve; a shearing ring is arranged between the upper portions of the sealing steel sleeve and the upper connector, a safety shearing nail is arranged on the upper portion of the shearing ring, and a sealing piston isarranged between the lower portions of the sealing steel sleeve and the upper connector; and the lower portions of the sealing piston and the upper connector are connected through a reversed buckle,an impact cavity is formed between the shearing ring and the sealing piston, and a sand-loosening hole is formed in the lower portion of the sealing steel sleeve. The sand-loosening type petroleum downhole safety connector has the beneficial effects that sand jam is solved, a pipe column can be safely pulled out, oil well overhauling is prevented, a sand control pipe can be directly pulled out invarious situations, the problem that most sand control pipes are taken out in sections at present is solved, operation is simple, and time saving and labor saving are achieved.

The invention discloses a maintenance decision-making method based on a power generation equipment operation state comprehensive evaluation model. Power generation equipment status is included, wherein the power generation equipment status comprises n mutually independent characteristic quantity values x1(t), x2(t),..., xn(t)representing the power generation equipment status respectively; x1(t), x2(t),..., xn(t) come from the same object, so that the x1(t), x2(t),..., xn(t) are considered as a whole to form an m-dimensional vector which is called as a status feature vector of the equipment, and an n-dimensional space formed by all possible values of the state feature vector x at the moment t is called as a state feature space. The invention discloses a maintenance decision-making method based on a power generation equipment operation state comprehensive evaluation model. The deterioration degree of comprehensive characteristic parameters representing the equipment status is used for representing the health condition of the equipment, the comprehensive characteristic parameters comprise vibration time threshold signal characteristics, vibration frequency spectrum characteristics andvibration change trend characteristics, and the accuracy of describing the health condition of the equipment can be effectively improved through the method.

The invention provides a large-span steel structure roof transformation method. The method is used for transforming an original roof of a large-span steel structure, and comprises the following stepsthat (1) a first roof plate located in the middle of the original roof is dismounted, a second roof plate located on the edge portion of the original roof and a third roof plate located between the first roof plate and the second roof plate are reserved, and the lower portion of the first roof plate is paved with a safety net and fireproof tarpaulin, so that construction safety is guaranteed; (2)an ETFE air pillow film is arranged on a first steel structure corresponding to the original position of the first roof plate; and (3) an aluminum-magnesium-manganese metal roof plate covering the third roof plate is additionally arranged in an area between the ETFE air pillow film and the second roof plate. The problem of roof leakage can be thoroughly solved; and the roof structure load can be reduced, large disassembly and large construction can be avoided, reconstruction funds can be saved, and an existing building can meet the requirements of comfort, energy conservation, environmental protection and attractiveness.

The invention discloses a water injection packer, which belongs to the field of oil field water injection. The water injection packer includes: a central pipe, an upper joint, a piston, a connecting head, a lower joint, a shear nail seat and an anti-seating shear nail, etc. The present invention forms a backwash channel through the first water inlet hole, the second water inlet hole, the first annular space, the upper second annular space and the first water outlet hole. The sealing process and the backwashing process share one piston, and the structure is simple and the backwashing process is simple. After washing, the piston moves upwards to close the backwash channel under the action of the elastic force of the elastic member, avoiding positive pressure on the oil pipe. The operation is simple, and the connection head and the lower joint are connected by pins. When sand stuck, sand buried or sleeve deformation occurs When the water injection pipe string cannot be removed, the pin can be pulled out by lifting the upper joint, thereby pulling out the upper part of the joint head of the present invention and the upper pipe string, and only repairing part of the water injection pipe string, avoiding overhaul of the water injection pipe string .

The invention discloses a method for evaluating the heat preservation performance of a pipeline. According to the method, ten evaluation indexes are adopted, a subjective and objective comprehensive evaluation method combining an analytic hierarchy process and a grey correlation analysis method and a comprehensive multi-index evaluation method for evaluating the heat preservation performance of the pipeline are combined, the two subjective and objective evaluation methods are combined, and the method considers the importance degree of indexes, and is not divorced from objective data, and is anevaluation method combining qualitative analysis and quantitative analysis. According to the method, the pipelines urgently needing heat preservation transformation can be screened out more reasonably, an accurate basis is provided for heat preservation upgrading transformation of the pipelines, the transformation funds are efficiently utilized, and under-repair and over-repair are avoided.

The invention discloses an accessible roof transformed on the basis of a slope-finding roof, and a construction method thereof. The accessible roof comprises an existing wall, an existing roof, new-built parapet walls, waterproof layers, a plurality of light steel pipes, a spring layer, a light steel plate and an accessible roof layer. One of the waterproof layers is arranged on the upper portionof the existing roof, and the spring layer is arranged on the upper portion of the waterproof layer; the multiple light steel pipes are arranged in the middle of the spring layer, regularly penetratethrough the spring layer and are distributed in the middle of the spring layer; the upper portions of the light steel pipes are connected with the light steel plate, and the lower portion of the lightsteel plate is closely attached to the spring layer; and the accessible roof layer is arranged on the upper portion of the light steel plate, and the other waterproof layer is arranged on the upper portion of the accessible roof layer. The existing slope-finding roof is transformed, thus mass-demolishing and mass-construction for transformation of an existing building are avoided, the structure is simple, construction is rapid, and normal life needs of people is not affected.

The invention provides an auxiliary overhauling method, an auxiliary overhauling device and an auxiliary overhauling system for a railway vehicle, and relates to the technical field of vehicle overhauling. The rail vehicle is provided with a detection system, and the detection system is used for detecting a plurality of components and outputting state parameters of all the components. The maintenance method comprises the steps: acquiring the state parameters of at least one component; searching an overhaul model corresponding to the state parameter from a preset database according to the stateparameter; obtaining maintenance parameters according to the state parameters and the maintenance model; when the maintenance parameter reaches a threshold value, sending a maintenance prompt signaland maintenance condition information; detecting the maintenance stations meeting the maintenance condition information, and sending a maintenance prompt signal and relative position information of the maintenance stations and the vehicle to the detection system. According to the auxiliary overhauling method, the auxiliary overhauling device and the auxiliary overhauling system of the railway vehicle, the overhauling resources can be saved, and the overhauling process is accelerated.

The invention relates to a small unsealing force packer. The small unsealing force packer comprises an upper joint, a central pipe, an upper outer pipe, a lower outer pipe, a well flushing piston seat, an upper piston, a well flushing piston sleeve, a rubber cylinder assembly, and a short joint, and the small unsealing force packer is characterized in that a one-way exhaust valve is assembled between an exhaust hole of a pressure bearing joint and the lower outer pipe, a setting piston is installed on the lower outer pipe, fixed by a setting shear pin, and unsealed to sleeve a circlip hook andlocked to a circlip hook body, an unsealed shear pin is screwed on the circlip hook for fixation, and a circlip is installed on the circlip hook. The lower part of a lower joint is connected with theshort joint by a forced unsealed shear pin, and the outer side of the lower part of the lower joint is provided with a sheath which is fixed by a sheath pin. According to the small unsealing force packer, a forced unsealing structure is arranged at the lower short joint portion; and the unsealed shear pin does not bear the rebound force of the rubber cylinder, the size of the unsealed shear pin is reduced, the strength of the unsealed shear pin is reduced, and the packer can be unsealed with very low unsealing force. After being set, the packer can be locked in one way to ensure that the packer is set tightly and reliably.

The invention discloses an undercarriage remaining use frequency model training method and device, computer equipment and a storage medium, relates to the technical field of undercarriage folding andunfolding, and is used for predicting the remaining use frequency of an aircraft undercarriage. According to the main technical scheme, the method comprises the following steps: acquiring time serieshistorical sample data of folding or unfolding time of an aircraft landing gear; extracting a sample length feature, a sample degradation rate feature, a sample differential degradation rate feature and a sample relative degradation rate feature of the undercarriage from the historical sample, and the number of remaining use times of the sample of the undercarriage; forming a feature vector by thesample length feature, the sample degradation rate feature, the sample differential degradation rate feature and the sample relative degradation rate feature of the undercarriage, and determining theremaining use frequency of the undercarriage as a label; and training a model according to the feature vector and the label to obtain an undercarriage remaining use frequency model.