30 results about "Operational maintenance" patented technology

The invention relates to an electric energy metering box, in particular to a cabinet door linkage type electrical equipment translation electric energy metering box convenient to overhaul. The technical problem of the invention is to provide an electric energy metering box which can carry out maintenance on the interior of the metering box in a multi-angle and omnibearing manner. A cabinet door linkage type electrical equipment translation electric energy metering box convenient to overhaul comprises a box body outer cover, a box body top cover is fixedly installed at the top of the box body outer cover, a metering box A is installed in the middle of the interior of the box body outer cover through a support, a metering box C is installed on one side of the surface of the metering box A, and a metering box B is installed on the other side of the surface of the metering box A; and a crank arm transmission box body unfolding mechanism is arranged below the metering box A, so that the metering box A, the metering box B and the metering box C can be conveniently opened at the same time, internal equipment can be subjected to on-off operation, maintenance or dust removal and the like, frequent position movement or complicated disassembly is not needed, and the working efficiency is greatly improved.

The utility model discloses a novel telescopic protection device for a mining belt self-moving tail, and belongs to the technical field of mining belt conveying equipment. The cable rack is driven by the oil cylinder to move along the belt self-moving machine tail, telescopic overlapping of the guardrails is achieved through the guiding device, and the protection range can be dynamically adjusted along with changes of coal unloading points of the reversed loader. Detachable positioning pins are arranged on wheel carriers at the bottom of the cable rack, so that quick fixing is facilitated; and the top cable hook accommodates the cable in order. The magnet frame is hinged through a pin shaft, a magnet (a permanent magnet or an electromagnet) at the bottom of the magnet frame can adsorb metal foreign matters in coal flow, and the equipment stability and the maintenance convenience are improved by matching with a guide pulley lubricated by an oil injection hole of the guide device. The protection device solves the problems that a traditional protection device is insufficient in dynamic protection, a belt is prone to being damaged by metal, operation and maintenance are tedious and the like, integration of full-stroke protection, foreign matter interception and cable management is achieved, safety and efficiency of coal mine belt conveying are remarkably improved, and the protection device is suitable for protection scenes of an underground belt self-moving tail.

The application provides an MML command execution method, device and equipment of an operation and maintenance center, and a medium, relates to the technical field of system operation and maintenance, and the execution method comprises the following steps: processing an obtained MML command to obtain a first branch command and a second branch command; any branch command comprises an execution object and an execution command; the execution object and / or the execution command of the first branch command and the second branch command are different; the first branch command and the second branch command are sent to a 5G network element conforming to the execution object, so that the 5G network element receiving the first branch command and / or the second branch command executes the corresponding execution command; an execution result returned by each 5G network element is received, and an execution result of the MML command is generated based on all the execution results. The operation and maintenance center of the application realizes control on a complex MML command of a 5G network element, so that the MML command can automatically execute branch commands according to the execution result of an intermediate process, without manual intervention.

The application discloses a kind of control device to new and old wet dry type sand particle carries out high-efficiency discharge, it is related to engine raw material discharge field, solve the technical problems that the existing material storage and discharge operation device exist material residual, discharge mode single, transmission unstable, support not firm and the operation maintenance is not convenient.The device includes circular charging barrel, support seat and base;Second drive structure is equipped between circular charging barrel and support seat, first drive structure is equipped on base, first drive structure is engaged with second drive structure, second drive structure is equipped with stirring structure, the side of circular charging barrel is equipped with first discharge pipeline and second discharge pipeline, first discharge pipeline is installed with first discharge electric valve, second discharge pipeline is installed with second discharge electric valve.The application also discloses a kind of control method to new and old wet dry type sand particle carries out high-efficiency discharge.The application effectively solves the problem that the existing device material residual is much, waste is serious.

The invention discloses a diaphragm compressor multi-stage compression structure based on four cylinder heads and an application system, and relates to the technical field of diaphragm compressors, the structure comprises a box body, a flywheel is installed at the upper end of the box body, and a first middle body and a second middle body are installed on the front side and the rear side of the left end of the box body respectively. The single-unit integrated design is adopted, the compression stage number is flexible and adjustable, the customized requirements of customers for gas pressure and displacement can be accurately met, and system configuration is simplified to adapt to multiple scenes; multi-stage compression can be achieved through a single compressor, the overall coordination of the system is improved, connecting pipelines are reduced, the pressure loss and the leakage risk are reduced, and the operation stability and reliability are enhanced; the economical efficiency and the operation efficiency are further promoted to realize double optimization, the early-stage investment cost and the occupied area are reduced, and the efficiency loss and the throttling loss in operation are reduced; therefore, the operation and maintenance complexity is greatly reduced, the operation logic and control system is simplified, the maintenance workload and cost are reduced, and the production continuity is guaranteed.

The light drilling pump skid based on the hydraulic motor comprises a large base, a crankshaft direct-drive drilling pump is arranged on the large base, the hydraulic motor is coaxially connected to a crankshaft of the drilling pump, and a hydraulic motor body is fixed to a rack of the drilling pump through a connecting disc. According to the light drilling pump skid based on the hydraulic motor, the structural design thought of a conventional pump skid is broken through, the small-size and large-torque hydraulic motor is adopted to directly drive a drilling pump crankshaft, and the problems that due to the arrangement of a transmission link, the weight is large, the boundary dimension is large, and the operation and maintenance link is complex are solved; meanwhile, the crankshaft direct-drive drilling pump is compact in structure, high in reliability and high in transmission efficiency, and the overall reliability and the long service life of the pump skid are guaranteed. And the device has very strong practical significance in the aspects of promoting technical development of drilling equipment and upgrading and updating of drilling pump products.

The invention belongs to the technical field of gluing and developing equipment, and particularly relates to a glue bottle replacement structure of gluing and developing equipment, which comprises a main support sliding plate, linear sliding rails and fixed side plates, the main support sliding plate is connected with the sliding ends of a plurality of linear sliding rails, and the fixed end of each linear sliding rail is fixedly connected with one corresponding fixed side plate; each fixing side plate is fixedly connected to the glue bottle bearing frame and located on the lower side of the corresponding glue bottle supporting plate, and the main supporting sliding plate is located on the lower side of the corresponding glue bottle supporting plate. When a glue bottle is replaced, an old or new glue bottle needing to be replaced can be directly and temporarily placed on the main supporting sliding plate and is closer to the glue bottle supporting plate, so that the situation that a maintainer has uncomfortable operation actions such as bending down is reduced, the workload of the maintainer can be effectively reduced, the working efficiency of replacement operation is improved, and the labor intensity of the maintainer is reduced. The whole structure is relatively simple and stable, small in occupied space and convenient to operate and maintain.

This invention relates to the field of marine seawater piping system control technology, specifically to a centralized control and monitoring system and method for marine seawater piping systems. This invention enables remote, multi-level monitoring and control of the entire marine seawater system, allowing for timely understanding of the system's current status. This provides accurate data for the engine department's operation and maintenance, and enables timely decision-making regarding remote equipment operation or malfunctions, greatly improving the operability and maintainability of the seawater system. The invention utilizes a remote control system for the pneumatic butterfly valve in the main seawater pipe, a self-cleaning seawater filter monitoring system for monitoring the filter's operating status and self-cleaning control, and an anti-corrosion sleeve monitoring system for monitoring the anti-corrosion sleeve's operating status. These features allow for the immediate detection and handling of faulty components in the seawater system, ensuring the stable and normal operation of the entire marine seawater system.

The utility model provides a hydraulic tensioning device, which aims to realize long-term stable operation, has the characteristics of low noise, low energy consumption, easiness in operation and maintenance and the like, and can automatically adjust the tensioning force to ensure the stability of a belt conveyor. The device comprises an oil cylinder support, an oil cylinder, a pulley seat, a movable pulley, a fixed seat, a fixed pulley, a bend wheel support, a bend wheel, a steel wire rope, a self-control hydraulic tensioning pump station and an electric control system. Compared with a traditional device, energy consumption is reduced through an efficient hydraulic system, the structural design is simplified, the operation and maintenance difficulty is reduced, and the operation efficiency and reliability of the belt conveyor are improved through automatic tensioning force adjustment.

The invention provides a method and a device for fault diagnosis of a yaw system in a wind turbine, and relates to the technical field of wind turbines. The method comprises the following steps: acquiring monitoring data collected in a yaw system, inputting the monitoring data into a yaw fault diagnosis model, and outputting a fault diagnosis result, wherein the fault diagnosis model is obtained by training known fault diagnosis results and corresponding monitoring data, and the fault diagnosis result comprises at least one of the following: the position of a yaw sensor is shifted, the yaw sensor is damaged, the yaw contactor is stuck, the hardware of a yaw motor / reducer is damaged, and the yaw motor is braked, In the working process, the monitoring data collected by the yaw system can be input into the yaw fault diagnosis model in real time, and the yaw fault diagnosis model can be used to determine whether the yaw system has a fault and the specific fault diagnosis results when the fault occurs. In this way, the operation and maintenance personnel can be prevented from going to the aircraft seat for inspection, and the fault diagnosis efficiency of the yaw system can be improved.

The utility model discloses a 5G communication base station which comprises a vertical tower, the top end of the vertical tower is fixedly connected with a circular supporting ring, the top of the circular supporting ring is fixedly connected with an upper frame, the outer side of the upper frame is fixedly connected with three positioning cylinders, the positioning cylinders are internally provided with mounting racks, the mounting racks are provided with 5G antenna modules, and the 5G antenna modules are provided with 5G antenna modules. The bottom of the vertical tower is fixedly connected with a grounding seat, and the middle of the upper frame is provided with a circle. According to the utility model, a platform for personnel standing is provided in the upper frame to protect the installation of maintenance personnel, the operation is convenient during the operation, and during the maintenance operation, the positioning of the installation rack is firstly released, then the installation rack is rotated in the positioning cylinder, and the 5G antenna module is rotated to the inner side facing the upper frame, so that the maintenance is convenient, and the maintenance efficiency is improved. And the operation is more labor-saving and convenient, so that the device has the advantages of being convenient for maintenance personnel to stand for operation, better in safety and more convenient and safer in antenna operation.

The invention relates to a redundant bypass switching cabinet for high-voltage variable-frequency soft start, which drives a gear set to be linked with a guide column by rotating an adjusting valve to drive a sliding block to move up and down along a mounting frame so as to adjust the position of a connecting column, can easily adapt to different types of electric appliance detection equipment, and does not need a worker to contact high-voltage parts in the cabinet. The electric shock risk is thoroughly avoided; the dust collection groove, the dust collection cabinet and the dust collection box are matched to collect dust, the cabinet door switch and the dust collection box are linked, the dust collection box automatically slides out for cleaning when the cabinet door switch is opened and is reset and closed when the cabinet door switch is closed, additional operation is not needed, electric appliance short circuit risks caused by dust accumulation are reduced, and the service life of equipment is prolonged; a fan on the upper surface of the cabinet body accelerates air flow in the cabinet and cooperates with a left ventilation opening to form a heat dissipation channel, so that heat of parts is rapidly taken away, and performance reduction or damage caused by high temperature is avoided; operation and maintenance are convenient, a cabinet door handle, a door lock and a lock catch are convenient to open and overhaul, the sealing performance is guaranteed, the dust collection box linkage design and the regulating valve external operation structure are adopted, the maintenance complexity is further reduced, and the maintenance efficiency is improved.

The utility model provides a kind of light cast stone groove scraper, including reinforcing steel plate, the main body steel plate of the reinforcing steel plate upper portion being equipped with and the standby steel plate of the reinforcing steel plate lower portion being equipped with, wherein: the reinforcing steel plate both ends are symmetrically equipped with connecting ear ring;The reinforcing steel plate upper and lower sides are symmetrically equipped with a set of clamping device;The main body steel plate and standby steel plate both sides are symmetrically equipped with a set of connecting lug, a set of the connecting lug is respectively set in the main body steel plate and standby steel plate both sides;The main body steel plate and standby steel plate are clamped with reinforcing steel plate, and the reinforcing steel plate is set in the back of main body steel plate along the length direction of main body steel plate.This device solves the existing scraper's problems of poor bending resistance, low reliability, short service life and resource waste, and is particularly suitable for small scraper, through innovative structure design, significantly improve the comprehensive performance of scraper, realize energy saving and environmental protection, its structure is simple and reliable, easy to operate, maintenance cost is low, and applicability is wider.

This invention relates to the field of network operation and maintenance management technology, and particularly to a method, apparatus, device, and storage medium for adaptive adjustment of alarm behavior. This application collects real-time bandwidth occupancy data and operational event logs from network pathways, combines this with a dynamic baseline of historical traffic levels, and considers traffic fluctuations caused by specific types of operational events in the short term. Based on these two variables, the system adjusts relevant parameters for traffic anomaly warnings. The system performs multi-level classification judgments for primary alarms (bandwidth overload) and advanced alarms (continuous overload) according to the dynamically adjusted warning parameters, and adjusts the combination mode of visual warnings and acoustic alarms to match the actual anomaly level. This solution can effectively distinguish between normal business fluctuations and genuine anomalies, enabling the system to have adaptive tolerance for events within the operational maintenance plan, avoiding invalid alarms, preventing excessive interference with low-level anomalies, reducing ineffective responses from maintenance personnel, and significantly improving the timeliness and accuracy of maintenance work.

The utility model provides a low-voltage cabinet convenient for maintaining electrical equipment in the cabinet, belongs to the technical field of electrical equipment, and aims to solve the problems that a certain distance exists when the electrical equipment is operated and maintained in the prior art, and the distance between operations is easy to influence the maintenance of the electrical equipment by workers. Comprising a low-voltage cabinet body, a low-voltage rotating shaft, a low-voltage protecting cover, a mounting sliding plate, a low-voltage component, a placement groove, a maintenance moving mechanism and a tool placement mechanism, the low-voltage rotating shaft is rotationally connected to the left end surface of the low-voltage cabinet body; the low-voltage protecting cover is fixedly connected to the low-voltage rotating shaft; the installation slide plate is slidably connected in the low-voltage cabinet body. The low-pressure component is in bolted connection with the front end face of the mounting sliding plate; the placement groove is formed in the lower side of the low-voltage cabinet body; the maintenance moving mechanism is arranged in the low-voltage cabinet body; the tool placing mechanism is arranged on the lower side of the low-voltage cabinet body. And through the maintenance moving mechanism, the low-voltage cabinet can be conveniently maintained by a worker, and through the tool placement mechanism, tools can be conveniently stored in a placement groove.

The invention discloses an efficient non-metal waste crushing-sorting integrated device, and relates to the technical field of solid waste resource utilization, the efficient non-metal waste crushing-sorting integrated device comprises a support, the upper surface of the support is fixedly connected with a crushing box through bolts, and one side of the crushing box is rotatably provided with a side half pipe; a feeding hopper is fixedly connected to the upper surface of the side half pipe through bolts, a discharging pipe is fixedly arranged on the lower surface of the smashing box, a base is fixedly arranged on the upper surface of the support, a direct current motor is fixedly arranged on the upper surface of the base, and the outer surface of the output end of the direct current motor is sleeved with an output shaft which is located in the smashing box. According to the efficient non-metal waste crushing-sorting integrated device, the crushing efficiency and precision are improved through two-stage treatment, the equipment load and waste are reduced through the sorting function, operation and maintenance are easier through feeding adjustment, the turnover side half pipe and the detachable screen frame, and it is guaranteed that equipment is stable and durable through cooperation of stable transmission and reasonable components.

The utility model relates to the technical field of paper roll production equipment, in particular to a dust removal device of a rewinding machine, and aims to solve the problem of dust and fiber dust pollution generated by the rewinding machine in the production process of materials such as paper and films. The device comprises an upper dust removal part, a middle dust removal part and a lower dust removal part which are modularly designed, each dust removal part is composed of a top dust removal box, a side dust removal box, a dust removal cylinder and a lower dust removal box, and a top dust removal cavity and a side dust removal cavity are connected through corner suction cavity cylinders to form an efficient double-direction dust suction structure. The corner suction cavity cylinder adopts a cambered surface shell design and is matched with the dust suction air cylinder to be connected with an external air suction system, so that a good dust suction effect is ensured. And the whole device can be flexibly assembled according to rewinder of different specifications, the equipment does not need to be completely closed, and operation and maintenance are convenient. The dust removal device not only improves the dust removal efficiency, but also improves the working environment, prolongs the service life of equipment, and is suitable for various processing and production equipment.

The utility model belongs to chemical raw material loading and unloading equipment technical field, concretely relates to a concentrated sulfuric acid no drip automatic unloading device structure. The utility model discloses through the reasonable arrangement of unloading tank, liquid inlet line, liquid outlet line and exhaust line, its operation maintenance is convenient, and stable and reliable are used, and tank car and unloading tank adopt hard connection mode, and the sealing reliability is reliable, and the safety performance is far higher than traditional filling hose, and adopts unloading pump and liquid level sensor, flowmeter cooperation uses, can alleviate the labor intensity of operating personnel, reduces manual cost, improves unloading efficiency, the utility model discloses whole structure is compact, and simple operation can realize concentrated sulfuric acid unloading no residue, no drip, and the automation degree is high, and the safety is good, can effectively avoid the personal injury problem caused by concentrated sulfuric acid leakage, and the application prospect is wide, and easy to promote.

This invention belongs to the field of electricity meter technology, specifically a multi-functional electricity meter, comprising a multi-functional electricity meter body, with an installation mechanism sleeved at the rear end of the multi-functional electricity meter body. The rear end of the installation mechanism is mounted on a track inside the meter box, and conductive mechanisms are installed on both the upper and lower sides of the installation mechanism. In this invention, the multi-functional electricity meter body is installed in the installation mechanism in a plug-in manner, and the installation mechanism is installed in the meter box using a track. During maintenance, workers only need to pull out the faulty multi-functional electricity meter body to repair and replace it, without needing to perform any operation on the normal multi-functional electricity meter body. This reduces maintenance work, saves time and effort, and increases maintenance efficiency, significantly simplifying maintenance operations in scenarios with densely installed multiple meters. The circuit inside the meter box is connected to the multi-functional electricity meter body through the conductive mechanism. When the multi-functional electricity meter body is pulled out for maintenance, there is no need to disassemble or reassemble the wiring, significantly reducing the probability of misconnection and significantly improving safety performance.

The invention relates to the technical field of liquid cooling, and discloses liquid cooling equipment which not only can improve the heat exchange efficiency, but also can improve the convenience of operation and maintenance. The liquid cooling equipment comprises a case, and a heat exchanger, a secondary side pump set, a primary side liquid inlet pipeline, a primary side liquid outlet pipeline, a secondary side liquid inlet pipeline and a secondary side liquid outlet pipeline which are arranged in the case. The case comprises a top plate, a bottom plate, a front maintenance door plate, a rear maintenance door plate, a left door plate and a right door plate. The secondary side pump set is arranged on the secondary side liquid inlet pipeline or the secondary side liquid outlet pipeline, one of the heat exchanger and the secondary side pump set is arranged on the bottom plate, and the other one of the heat exchanger and the secondary side pump set is arranged on the top plate. One part of the primary side liquid inlet pipeline, one part of the primary side liquid outlet pipeline, one part of the secondary side liquid inlet pipeline and one part of the secondary side liquid outlet pipeline are arranged at the position close to the left door plate, and the other part is arranged at the position close to the right door plate.

In order to solve the problem of low registration / de-registration operation efficiency of an NF instance in the prior art, the embodiment of the invention provides an operation method for a network function instance and related equipment. The method comprises the following steps: when a target network element with an operation condition is monitored, sending a first 5G message to an operation and maintenance party to inquire whether a corresponding operation matched with the operation condition is performed on an NF instance of the target network element; if the operation and maintenance party confirms to perform corresponding operation on the NF instance, sending an operation instruction to an operation and maintenance center (OMC); the operation instruction is used for triggering the OMC to execute the corresponding operation on the NF instance at a network function register (NRF); wherein the operation condition is that a fault occurs or the fault is eliminated; the corresponding operation is registration removal or registration.

The utility model relates to rotating ladder technical field is a kind of 360 degree rotating ladder structure inside spherical storage tank, including spherical tank body, top rotating structure, upper ladder structure, conversion structure, lower ladder structure and bottom rotating structure, upper ladder structure top is fixedly connected with top rotating structure, and top rotating structure upside is fixedly connected with spherical tank body inside top, and upper ladder structure bottom is fixedly connected with conversion structure, and conversion structure lower part is fixedly connected with lower ladder structure;The utility model simple structure is convenient to use, and it is set 360 degree rotating ladder in spherical tank body, and rotating ladder structure is good in stress, simple to manufacture, and high in safety performance, provides very efficient, reliable and convenient solution for the inside personnel of large spherical tank and other equipment to be inspected, overhauled and operated and maintained, and the good stress performance of rotating ladder ensures stable operation under various working conditions, and personnel frequently move without fear.

The invention discloses an escalator four-dimensional fusion operation and maintenance digital twinning system and a design method, belongs to the technical field of digital twinning and intelligent operation and maintenance, and comprises a closed-loop digital twinning architecture integrating a physical space, a digital space, a service space and a digital main line. The physical space collects full-dimension operation data of the equipment in real time through a heterogeneous sensor network; a high-fidelity virtual model is constructed in the digital space, and state mapping and synchronous simulation are achieved; the service space serves as an intelligent center, and a fault diagnosis model based on multi-domain feature extraction and machine learning is adopted for health assessment and predictive maintenance decision making; the digital main line serves as a nervous system, the three main lines are operated, maintained and controlled to ensure that data flows in a bidirectional, real-time and traceable mode among three spaces, a complete closed loop from sensing, analysis, decision making to execution is formed, and integrated, intelligent and high-reliability operation and maintenance of the manned special equipment in the whole life cycle are achieved.

The utility model relates to natural gas pipeline maintenance technical field discloses the leakage detection device for natural gas pipeline operation maintenance, including arc magnetic attraction base, arc magnetic attraction base inboard is equipped with the magnetic piece for adsorbing pipeline, still includes arc guide rail, detection slider, double sensor module, data processing module, arc magnetic attraction base inboard middle part is equipped with arc mounting groove, and the magnetic piece symmetrical distribution is at the both sides of arc mounting groove, and arc guide rail is fixed in arc mounting groove. Compared with prior art, the advantage lies in: through the combination of arc magnetic attraction quick -mounting structure and double sensor cooperative detection structure's design, the quick installation positioning of different pipe diameter pipeline, the high accuracy quick detection of pipeline outer wall methane leakage are realized to the cooperation of two, the cooperation of micro -step motor and gear, tooth slot can drive detection slider accurate movement along arc guide rail, realizes the comprehensive coverage detection of pipeline circumferential direction.

The invention provides a biomass coupling blending combustion system debugging method, and belongs to the technical field of biomass power generation. Comprising the following steps: S1, preparation and inspection before system debugging: inspecting the installation positions and heights of a low-voltage electrical control cabinet and an operation box in a system to ensure that design and operation maintenance requirements are met; measuring the insulation resistance of the low-voltage apparatus loop and confirming qualification; impurities in the equipment are cleaned, a pipeline is washed with compressed air or clean water, and meanwhile equipment lubrication and material preparation are completed; s2, single machine debugging: sequentially carrying out a valve transmission test, crusher and conveying fan motor single body test operation, rotary feeder debugging, dust remover debugging, dust removal fan debugging, belt conveyor debugging and spiral conveyor debugging, wherein each single machine debugging comprises two sub-steps of checking before test operation and starting test rotation; the beneficial effects are that normal functions of each device and good system collaboration are ensured; quality indexes and a protection mechanism are determined, and equipment operation parameters are guaranteed to reach the standard.

The invention discloses a maintainability safety check analysis method and system for oil and gas field project assets, and the method comprises the steps: compiling a maintainability project asset classification table according to a project construction flow chart and a project asset list, and generating a check card of each type of maintainability project assets according to the maintainability project asset classification table, and performing maintainability safety inspection on each device in the project construction three-dimensional model based on the inspection card, analyzing and outputting an inspection report, and making a rectification list based on the inspection report and tracking. Daily operation, maintenance inspection and analysis are carried out on project assets in the project construction stage from the angles of owner operation and maintenance, project constructability, operability and maintainability are unified, oil and gas field projects are more efficient and have more economic benefits in the whole life cycle, and a large amount of construction investment and operation and maintenance cost can be saved for owners.

A method for monitoring at least one machine including causing at least a first sensor to acquire at least a first non-stationary signal from at least one machine operating in a non-stationary manner during at least one operational time frame, the first sensor(s) providing at least a first non-stationary output, causing at least a second sensor to acquire at least a second non-stationary signal from the machine(s) during the operational time frame(s), the second sensor(s) providing at least a second non-stationary output, fusing the first non-stationary output(s) with the second non-stationary output(s) to produce a fused output, extracting at least one feature from the first and / or second non-stationary signal(s) based on the fused output, analyzing the feature(s) to ascertain a state of health of the machine(s) and performing a repair operation, maintenance operation and / or modification of operating parameters of the machine(s) based on the analyzed state of health.

The utility model discloses a rectangular valve well cover which comprises a split type rectangular cover plate which covers a well mouth of a valve well and can be opened and closed, the lower portion of the cover plate is fixedly connected with a rail wheel, a guide rail fixed to the well wall of the valve well is arranged below the rail wheel, the rail wheel slides on the guide rail, and a safety hook is arranged on the bottom face of the cover plate. A baffle used for clamping the hook is fixed to the inner wall of the valve well, a water stop belt is arranged above the cover plate, and a turnover rainproof shed is arranged above the water stop belt. According to the utility model, operation, maintenance, overhaul and the like of equipment and facilities in a well are realized by adding the track, and safe and efficient opening and closing of the well lid are realized, so that the problems of high cost and high risk of mechanical operation are solved.

The application discloses a method and a tool for replacing a hydraulic cylinder of a rolling mill, and the method and the tool for replacing the hydraulic cylinder replace the replacement scheme of arranging too many replacement auxiliary devices in a cramped operation space by utilizing the existing equipment of the rolling mill to a certain extent in the whole process, reduce operation steps, and the replacement tool body used in the replacement method is compact in structure, simple in operation and maintenance, automatic positioning in the process of replacing the hydraulic cylinder can be realized, and the replacement efficiency of the hydraulic cylinder is improved.