945 results about "Pressure stabilization" patented technology

The invention relates to the technical field of high-pressure gas cylinder control, and discloses a high-pressure gas cylinder valve pressure dynamic monitoring and self-adaptive adjusting method. The method comprises the following steps: dividing a high-pressure gas cylinder valve into a plurality of monitoring units, and obtaining pressure, temperature and flow data of each unit to form a comprehensive monitoring data set; establishing a pressure stability evaluation index and an environmental factor influence evaluation index based on the data set, and generating an initial risk value by applying a probability early warning mechanism and an adaptive prediction model; dynamically correcting the initial risk value and outputting a corrected risk value according to spatial relevance or time sequence dependency of adjacent monitoring units; and finally, the corrected risk values are sorted, a priority control instruction list is generated, and a control execution unit is combined to output a self-adaptive adjustment signal so as to adjust the opening degree of the valve. According to the method, comprehensive monitoring and dynamic adjustment of the high-pressure gas cylinder valve are achieved, and the operation stability of the valve is improved.

The invention belongs to the technical field of water supply network adjustment, and particularly relates to a water supply network pressure and flow adjusting method. The method comprises the following steps: firstly, collecting pressure, flow and water temperature data of a monitoring node at present and in a preset time period, wherein the preset time period is set according to a water consumption period; preprocessing flow data through a sliding window method and fitting a curve, and marking an instantaneous disturbance time period; the dynamic response coefficient of each disturbance time period is calculated, and water temperature correction is needed; combining the flow standard score, the dynamic response coefficient and the real-time deviation coefficient to obtain a flow dynamic regulation index; a pressure stability index is obtained through pressure and water temperature trend feature vector matching; the two are subjected to weighted fusion to form a pipe network comprehensive regulation factor, and the valve opening and the water pump power are regulated accordingly. The method can accurately identify instantaneous disturbance, improve the adjustment precision and response speed, and guarantee stable water supply.

The invention discloses a self-adaptive control method and system for a condenser for a nuclear power station, relates to the field of condenser control, and aims to predict a future load change trend in a prospective manner by analyzing historical data of a unit power instruction and steam flow, and calculate feed-forward circulating water flow based on a prediction result. On the basis, a feedback control loop based on actually measured pressure is reserved. More importantly, a self-adaptive bias correction mechanism is introduced, and continuous learning and correction are carried out on output of feedback control, so that steady-state errors of the system are eliminated, and uncertainty of the model is compensated. Finally, feed-forward, feedback and self-adaptive correction components are intelligently fused to form a final control instruction which can quickly respond to load changes and can accurately maintain pressure stability, and the problems of severe pressure fluctuation and energy waste under the dynamic working condition are effectively solved.

The invention relates to a micro-pressure oxygen cabin self-adaptive pressure control method and system based on iterative optimization, belongs to the technical field of pressure control, and aims at solving the problems that existing micro-pressure oxygen cabin pressure control depends on manual repeated debugging, the efficiency is low, and self-adaptive optimization cannot be achieved. The method comprises the steps that in the pressure stabilizing stage of the micro-pressure oxygen cabin, the pressure in the cabin is monitored in real time, and when the pressure exceeds the upper limit or the lower limit of a preset pressure interval, a pressure stabilizing wave crest section or wave trough section opening degree adjusting algorithm is executed so as to adjust the opening degree of an electric exhaust valve. And after the single oxygen therapy process is finished, executing an iterative optimization step: automatically analyzing the pressure data of the current pressure stabilization stage by the system, and iteratively updating the control parameters for the next oxygen therapy process according to the pressure data. According to the method, self-learning and evolution of control parameters are realized through a closed-loop mechanism of real-time adjustment and redisk optimization, the parameters can be quickly converged to the optimal state within multiple times of operation, the debugging period is shortened, and the stability of pressure control is improved.

The invention discloses an intelligent energy-saving control method for an air compression system based on data driving. The intelligent energy-saving control method is suitable for an industrial air compression station with multiple parallel units. According to the method, operating parameters of all air compressors and pressure and flow data of a header pipe are collected in real time, an energy efficiency model of the output flow and the gas-electricity ratio of all frequency converters is established, and the future flow requirement of the header pipe is dynamically predicted in combination with the characteristics of a fixed frequency machine. Based on a prediction result and a single-machine energy efficiency model, the basic load and the fluctuation load are distributed according to the overall energy efficiency optimization principle of the system, the start-stop sequence and the rotating speed of each unit are determined, and stable main pipe pressure, continuous gas supply, rapid response and good operation flexibility are achieved. By means of the method, the energy efficiency difference of all the units can be fully utilized, energy consumption fluctuation and equipment abrasion caused by frequent starting and stopping are reduced, and the overall energy utilization rate of the air compression system and the reliability of the industrial production process are improved.

The invention relates to the technical field of underground water prevention and control, in particular to a tunnel two-step grouting plugging method for wide crack water gushing, which comprises the following steps of: constructing a grouting hole intersected with a wide crack or a concentrated water gushing channel according to a geological survey result; first rapid plugging slurry is injected into the crack through the grouting hole, and the first rapid plugging slurry can form a temporary water stopping barrier in the flowing water environment; the water outlet amount change and the grouting pressure change of the adjacent observation holes are monitored, and when the water outlet amount is remarkably reduced and / or the grouting pressure stably rises and forms a platform, it is judged that the temporary water stop barrier is formed; and second reinforcing grout is injected into the crack through the grouting holes, and after the second reinforcing grout is solidified, a permanent reinforcing body with mechanical strength is formed. By optimizing the grouting material and the process time sequence, effective combination of rapid plugging and long-term reinforcement is achieved, the grouting reliability is improved, and the engineering cost is reduced.

The invention discloses grinding and polishing equipment for the inner wall of a pipe workpiece. The grinding and polishing equipment comprises a rack, a workpiece rotating and supporting mechanism, a grinding mechanism, a radial feeding mechanism, an axial moving mechanism, a workpiece stabilizing mechanism and an electric control system. The grinding assembly is a flexible grinding wheel formed by splicing a plurality of arc-shaped grinding pieces, a pneumatic motor drives the flexible grinding wheel to rotate at a high speed to serve as main cutting motion, constant-pressure contact control is achieved through a radial feeding mechanism, abrasion of the grinding wheel can be compensated in a self-adaptive mode through the control mode, and it is guaranteed that the grinding pressure is stable; therefore, the reference size of the workpiece is protected to the maximum extent while the defects of the inner wall are effectively removed, the problem of size out-of-tolerance caused by uneven pressure or abrasion in traditional rigid grinding is avoided, constant-pressure, efficient and high-quality grinding is guaranteed, and the grinding and polishing efficiency and quality of the inner wall of the pipe workpiece are effectively improved.

The invention relates to the technical field of micro-pressure oxygen cabins, in particular to an intelligent integrated oxygen generation and coordinated regulation and control method for a micro-pressure oxygen cabin, which comprises the following steps: supplying air to a cabin body of the micro-pressure oxygen cabin by adopting an air compressor, stably increasing the pressure in the micro-pressure oxygen cabin and stabilizing the pressure at a preset treatment pressure of 30kPa-50kPa through an intelligent pressure regulation and control system, high-pressure air in the micro-pressure oxygen cabin body serves as an oxygen production source and is conveyed to the VPSA oxygen production main machine; the VPSA oxygen production main machine adsorbs nitrogen through a zeolite molecular sieve filled in the VPSA oxygen production main machine and collects oxygen; s2, pressurizing the oxygen collected in the step S2 to 0.1-0.4 MPa or above through a supercharger, conveying the oxygen back into the micro-pressure oxygen cabin body, and allowing the user to breathe through an oxygen supply device; an intelligent cooperative control system is constructed, integrated management is carried out on the whole process of pressure boosting, pressure stabilization, oxygen generation, oxygen supply, safety and environment regulation and control, the occupied area and the purchase cost of equipment are reduced, the human error risk is reduced, and the micro-pressure oxygen treatment requirement under multiple scenes is met.

The invention relates to a method and a device for determining the flow characteristic of CO2 in a porous medium and the distribution rule of CH4 in a pore space. The method comprises the following steps: (1) pretreating a sample; (2) system connection and air tightness inspection; (3) vacuumizing the system; (4) temperature control; (5) CH4 saturation and pressure stabilization; (6) displacement experiment and data acquisition; (7) monitoring outlet gas; and (8) data processing. The problem that in existing CO2 geological sequestration and enhanced gas production research, due to the fact that in-situ visualization of the pore size cannot be achieved, a microscopic displacement mechanism is unclear is solved, and the method aims at providing scientific basis and technical support for efficient exploitation of natural gas and effective geological sequestration of CO2.

The invention discloses a gas storage integrated operation model construction method and system based on digital and intelligent twinning, and relates to the field of gas storage integrated operation model construction, and the method comprises the steps: constructing a single well IPR and VLP curve; a mode of combining forward pressure regulation and reverse pressure regulation is adopted, a pressure value set of all nodes after pressure stabilization is output, and a preliminary pressure steady-state scheme is formed; an economic value evaluation index function is constructed, and the total daily operation cost of the system under the given gas production rate is evaluated; a comprehensive optimization model based on a neural network is constructed, and injection-production quantity reference values of all wells and target values of all nodes are output; and verifying the stability of the comprehensive optimization model based on the neural network according to the output injection-production quantity reference values of all wells and the target values of all the nodes. The method has the advantages that the physical law of gas storage injection and production, the system pressure balance and the economical efficiency target are deeply fused, and a fast and reliable closed loop from pressure steady-state optimization to an economical optimal decision is achieved.

The invention discloses a cooling system pressure regulation and control method and device based on multi-source data fusion, and the method comprises the steps: collecting multi-source data from a cooling system through a sensor, carrying out the fusion processing, and generating a standardized sensor data set. And calculating a comprehensive system pressure value by adopting a data fusion technology according to the standardized sensor data set to obtain a fused pressure data set. And determining a system pressure state through threshold comparison based on the fused pressure data set. And obtaining channel flow data based on the system pressure state, and adjusting the opening degree of a valve to obtain an optimized regulation and control result. And transmitting the optimized regulation and control result to a pressure maintaining system, controlling the valve flow by adopting a pressure stabilization regulation algorithm, and determining a pressure balance index. Therefore, according to the cooling system pressure regulation and control method based on multi-source data fusion, the pressure change can be dynamically responded, the system pressure can be stably maintained, and the air resistance phenomenon can be effectively eradicated.

The invention discloses a double-machine regenerative steam-electricity double-drive small turbine thermodynamic system and a control method, belongs to the technical field of power generation, and aims to solve the problem that steam extraction parameter reduction and system power balance maintenance cannot be both considered in the prior art. According to the system, the MCT is adopted to extract exhaust steam of the ultrahigh-pressure cylinder to drive the water feeding pump and the variable-frequency generator, and meanwhile, a low-superheat-degree steam source is provided for the multi-stage heater. When P is greater than Pmax, executing at least one of the following control strategies: (a) adjusting the opening degree of a steam inlet valve of the MCT; (b) the opening degree of an MCT steam exhaust valve is adjusted; (c) adjusting the opening degree of a heater bypass valve; the steam exhaust pressure of the MCT is kept stable through three-way closed-loop control, and safe and efficient operation is achieved by combining power compensation of the variable-frequency generator.

The invention relates to the technical field of diaphragm pump automatic control, in particular to a diaphragm pump self-adaptive pressure relief and stabilization control method based on pressure feedback, which comprises the following steps: configuring reference parameters before starting and detecting faults of a pressure sensor, a pump driving unit and an electromagnetic pressure relief valve; obtaining an effective pressure value through moving average filtering; dynamically adjusting PID parameters according to the pressure deviation and the change trend; and pump rotating speed adjustment, graded pressure relief or emergency shutdown are executed according to the normal area, the early warning area and the overpressure area. The method effectively improves the pressure stabilization precision and the pressure relief response flexibility, comprehensively avoids the equipment fault risk, adapts to the working conditions of multiple fields, and remarkably enhances the reliability and practicability of system operation.

The invention relates to the technical field of ceramic filters, in particular to a backwashing device of a ceramic filter and a construction method thereof.The backwashing device comprises a filter body, a three-way valve is fixedly connected to the front side of the bottom of the filter body, and a water inlet pipe is fixedly communicated with the left side of the front of the three-way valve; the right side of the front portion of the three-way valve fixedly communicates with a pressurizing air supply pipe, the right end of the pressurizing air supply pipe is fixedly connected with an air storage tank, the top of the three-way valve is fixedly connected with a limiting frame, the front side of the limiting frame is fixedly connected with a transmission box, and the inner wall of the transmission box is fixedly connected with a controller. An adjusting mechanism is arranged in the transmission box, and a pressure stabilizing mechanism is arranged on the top of the pressurizing air supply pipe. Adjusting communication of the three-way valve and pressure stabilization of air supply are achieved, and the convenience and protection performance of the device are improved.

The invention belongs to the technical field of material processing, and relates to a composite mirror image fiber placement method and a system capable of realizing stable pressure control. The mirror image fiber placement method for the composite material comprises the following steps: laying two fiber ribbons in a mirror image symmetry manner without using a mold, and repeating the fiber placement process for multiple times; and real silk ribbon pressure is obtained in real time in the silk placement process, the pressure difference is calculated in real time, the modified value of the silk placement tail end movement mechanism path is calculated in real time according to the pressure difference, and the silk placement tail end movement mechanism path is updated in real time. The system capable of realizing stable pressure control comprises a hardware part and a control system, the hardware part comprises a fiber placement tail end movement mechanism and a pressure sensor; the control system comprises a pressure stability control subsystem, a control instruction generation subsystem and a fiber placement tail end movement mechanism control subsystem. The problem that the pressure is difficult to accurately control in the mold-free mirror image fiber placement process is solved, and the performance of a composite product is improved.

The invention discloses a double-energy-storage type hydro-pneumatic spring integrated damping suspension hydraulic cylinder and a vehicle. The double-energy-storage type hydro-pneumatic spring integrated damping suspension hydraulic cylinder comprises a mounting cylinder bottom, a suspension cylinder and an energy accumulator. An oil passing channel is formed in the mounting cylinder bottom, and a first communicating opening and two second communicating openings are formed in the mounting cylinder bottom. The suspension cylinder and the energy accumulators are both fixedly installed on the installation cylinder bottom, the two sets of energy accumulators are arranged and located on the two sides of the suspension cylinder in the radial direction respectively, the suspension cylinder and the energy accumulators are communicated with the oil passing channel through the first communication opening and the second communication opening respectively, and the suspension cylinder and the energy accumulators are communicated through the oil passing channel. The problem of pressure loss caused by a lengthy oil way of a traditional suspension system is effectively solved, and internal transmission of the oil way is achieved through integrated installation of the cylinder bottom. The double energy accumulators are symmetrically arranged to form a redundant pressure compensation mechanism, and the pressure stability of the system under the continuous vibration working condition is ensured. The overall structure is compact in design, occupied space is reduced, and the requirement for miniaturization of a suspension system of a special vehicle is met.

The invention discloses a fire hydrant water use state detection system and detection method, and relates to the technical field of ship fire fighting, the system comprises the following components: a physical sensing layer, a data transmission layer, a data processing and analysis layer, a digital twinborn layer and an application layer; according to the invention, the digital twinborn body of the application layer is utilized to simulate the water use state response of the fire hydrant under different working conditions and parameter settings in a virtual environment, the optimal system parameter configuration is found by analyzing key indexes such as pressure stability and flow uniformity, and the optimal system parameter configuration is applied to an actual system, so that the field debugging time is greatly shortened, and the debugging efficiency is improved. The debugging cost is reduced, the performance problem caused by unreasonable parameters is avoided, the overall operation stability of the system is improved, meanwhile, in the aspects of fault diagnosis and deduction, when abnormity is detected, the development processes of different fault scenes are simulated through the digital twin, the fault position can be quickly positioned, and the fault diagnosis and deduction efficiency is improved. And fault causes, influence ranges and propagation paths are analyzed.

The invention discloses a thermal power plant boiler steam pressure stability control method and system, and relates to the technical field of thermal power plant thermal automation control, and the method comprises the steps: obtaining the real-time data of multiple boilers of a thermal power plant to construct a matrix, building a global optimization model with the pressure fluctuation degree as the target and the unit regulation coupling degree as the constraint, and generating an initial strategy; the deviation degree of the system is evaluated, if the deviation degree exceeds a threshold value, optimization is conducted, an instruction is sent to be executed, and multi-boiler cooperative pressure control stability is achieved. The technical problems that in a traditional control technology, the regulation and control coupling relation among multiple boilers of a thermal power plant is not fully considered, pressure fluctuation, energy consumption efficiency and response time delay are difficult to balance, consequently, steam pressure stability is insufficient, and the precise control requirement under the complex working condition cannot be met are solved, and the purposes that the regulation and control coupling relation among the boilers is fully considered, and the control precision is improved are achieved. Pressure fluctuation, energy consumption efficiency and response time delay are balanced, and the technical effect of stable and accurate control over the steam pressure under the complex working condition is achieved.

The invention relates to a centrifugal compressor high-altitude environment dynamic simulation test system. The system comprises a compressor test module; the high-altitude environment simulation module comprises an air inlet surge tank, an air inlet assembly and a first air exhaust assembly which are arranged at the upstream of the air inlet pipeline, and an air exhaust surge tank and a second air exhaust assembly which are arranged at the downstream of the air exhaust pipeline; a measurement module; the control module is used for comparing the first actually-measured pressure value with a target altitude pressure value of the air inlet end and controlling the air inlet amount of the air inlet assembly and the air suction amount of the first air suction assembly according to a comparison result, so that the pressure of the air inlet pressure stabilizing tank is stabilized at the target altitude pressure of the air inlet end; and the control module compares the second actually measured pressure value with the target altitude pressure value of the exhaust end, and controls the air suction amount of the second air suction assembly according to the comparison result, so that the pressure of the exhaust surge tank is stabilized at the target altitude pressure value of the exhaust end. It is ensured that test data can truly reflect the actual plateau working condition performance of the gas compressor.

The invention discloses a drilling device for hydraulic ring geological exploration, and particularly relates to the technical field of geological exploration, the drilling device comprises a driving assembly, the driving assembly is provided with a direction adjusting assembly used for adjusting the angle, the direction adjusting assembly is provided with a drilling assembly used for drilling work, and the driving assembly is provided with a feeding adjusting assembly. According to the drilling device for hydraulic ring geological exploration, power is provided for the hydraulic telescopic rod through the hydraulic oil pumping assembly, stable axial feeding of the drilling assembly is achieved, the drilling depth is accurately controlled, the pressure relief assembly monitors the pressure of a hydraulic system in real time, and when the pressure exceeds a set threshold value, the hydraulic telescopic rod is driven to rotate; the electromagnetic ring drives the movable pipe to slide to expose the pressure relief hole, pressure relief is achieved through backflow of hydraulic oil, the situation that the device is damaged due to too large pressure caused by hard rock strata and the like is avoided, the elastic piece pushes the movable pipe to reset to close the pressure relief hole after the pressure is recovered, stable and balanced feeding pressure is guaranteed, self-adaptive pressure adjustment is achieved, and operation safety and reliability are improved.

The invention relates to a constant-force grinding device and method based on gravity-elastic force dynamic balance, solves the problem of contact force fluctuation caused by blade profile deviation, actuating mechanism positioning error and grinding tool abrasion, and ensures that normal pressure is stabilized at a set threshold value in the polishing process. The device comprises a constant-force coil spring, a motor, a base, a limiting block, a linear guide rail, a balancing weight, a grinding wheel and a foundation frame. The linear guide rail in the vertical direction is installed on the foundation frame, the base is connected to the linear guide rail in a sliding mode and can move up and down on the linear guide rail, the motor is fixed to the base, the upper end of the constant-force coil spring is fixedly connected to the top of the foundation frame, and the lower end of the constant-force coil spring is connected with the base. The balancing weight is installed on the motor or the base, and the balancing weight requirement is calculated according to the target downward pressure F. The contact force stability is improved; the maintenance period is prolonged, and the constant-force floating structure does not need electrical maintenance.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The invention discloses a timed and quantitative full-automatic intelligent water replenishing method and system, and relates to the technical field of intelligent water replenishment, and the method comprises the steps: generating a dynamic water replenishing control signal based on municipal pipe network pressure data, water tank liquid level height and water replenishing flow data which are monitored in real time; dividing and defining a water supplementing flow threshold range of a corresponding time period according to a preset time period, adjusting the opening degree of an electric adjusting valve based on the dynamic water supplementing control signal, supplementing water, and when it is monitored that the pressure of the municipal pipe network is lower than a preset protection threshold value, attenuating the water supplementing flow through a dynamic pressure compensation mechanism, and maintaining the stability of the pressure of the pipe network; predicting the water demand in the future time period, updating the target liquid level, and when the liquid level of the water tank reaches the target liquid level, triggering a redundancy protection mechanism to forcibly stop water replenishing. By introducing a dynamic pressure compensation mechanism, flow regulation and chaos disturbance factor feedback, the pipe network pressure stability, the water replenishing flow regulation precision and the response speed are optimized, the actual water use requirement is met, and the safety and the energy efficiency are improved.

The invention relates to the technical field of blade packaging suction tool control, and provides a milling cutter blade packaging suction tool control method and system.The method comprises the steps that the vacuum pressure establishing speed in a suction cup, fluctuation after the vacuum pressure is stabilized and response of the vacuum pressure to tentative movement of a mechanical arm are obtained and integrated, and suction state parameters are obtained; according to the adsorption state parameters, whether the adsorption state is in a critical unstable state or not is judged, and an adsorption state judgment result is obtained; starting a dynamic vacuum compensation mechanism when the adsorption state judgment result shows that the adsorption device is in a critical unstable state; through a dynamic vacuum compensation mechanism, in the blade carrying process of the mechanical arm, the adsorption force is enhanced by dynamically adjusting the power of a vacuum generator and / or applying auxiliary airflow. The milling cutter blade packaging device has the effect of improving the stability of milling cutter blade packaging operation.

According to the gluing equipment and the air pressure control method thereof, structural innovation is achieved through cooperative feedback of a control module, after the pressure of an airtight cavity is stable, direct communication between the airtight cavity and a working cavity is cut off through a switching valve set to form an independent closed circuit system, and the design thoroughly isolates interference of a compressed air source to the gluing process; according to the method, the technical scheme that when the pressure of the working cavity is reduced to the compensation threshold value, the air compression device is synchronously activated for compensation and the airtight cavity body passage is synchronously activated for reconstruction is innovatively adopted, rapid pressure recovery is achieved, and innovative control logic is constructed through a multi-stage judgment mechanism for presetting the pressure threshold value, the compensation threshold value and the recovery threshold value; and cooperative control of dynamic pressure relief of the airtight cavity and on-demand compensation of the working cavity is combined, so that the anti-interference capability of the system is remarkably improved.

The invention discloses a terminal pressure feedback variable frequency pump set cooperative adjustment method. A terminal pressure sensing module, a central control module, a variable frequency driving module and a plurality of variable frequency pumps connected in parallel are included. The throttling loss of the valve is avoided through the precise feedback of the tail end pressure and the cooperative adjustment of the variable frequency pump set, so that the pump set always operates in a high-efficiency interval (the efficiency is improved to more than 85%), and the energy is saved by 30-50% compared with the traditional constant-speed pump system; and meanwhile, multi-pump cooperative adjustment avoids long-term operation of a single pump in a low-efficiency interval, and the energy utilization rate is further increased. And the tail end pressure stability is high, the tail end most unfavorable point pressure is monitored in real time, and the tail end pressure fluctuation range is controlled within + / -0.02 MPa in combination with quick response adjustment within 50 ms, so that the problem of insufficient or overpressure of a far-end user is effectively solved, and the user experience is improved.

The invention relates to a production string leakage positioning method. The method comprises the steps that an initial pressure stable value of an oil sleeve annulus and a pressure fluctuation value of the oil sleeve annulus are obtained; calculating a pressure fluctuation threshold value of the oil jacket annulus according to the initial pressure stable value and the sensor monitoring error; the pressure fluctuation value is compared with a pressure fluctuation threshold value, and whether a new leakage point appears or not is judged; if no new leakage point appears, the depth of the leakage point is calculated according to the U-shaped pipe pressure balance principle, and a positioning result is obtained; and operating oil pressure fluctuation based on a positioning result to obtain an oil pressure fluctuation calculation value, and comparing the oil pressure fluctuation calculation value with an actually-monitored oil pressure fluctuation monitoring value to judge the positioning reliability. According to the method, the leakage point position is determined and the positioning result is verified by judging the state of the leakage point of the production pipe column in advance, so that the positioning precision is improved, the leakage pressure rising phenomenon of the production pipe column is effectively controlled, and the working efficiency is improved.

The invention relates to the technical field of electric power accessories, in particular to electronic connector end grinding equipment which comprises a storage mechanism used for bearing an electronic connector and functional assemblies. The adsorption fixing mechanism is mounted on the storage mechanism and is used for fixing an electronic connector; the grinding mechanism is arranged on one side of the storage mechanism, and the grinding mechanism comprises a driving assembly, a rough grinding assembly and a fine grinding assembly. A strain gauge type pressure sensor is used for detecting the contact pressure between a grinding roller and an end in real time, and after a signal is fed back to a control system, the grinding roller is driven to rotate; the servo motor drives the sleeve and the grinding roller to finely adjust the feeding amount through the ball screw, the grinding pressure is stabilized within a reasonable range, excessive end grinding or material damage caused by too large pressure is effectively avoided, meanwhile, surface defect residues caused by too small pressure are prevented, and the rough grinding precision and the product consistency are remarkably improved.

The invention discloses a skin treatment mechanism, and relates to the technical field of medical equipment.The skin treatment mechanism comprises a main control unit, an air pressure adjusting unit and an electrode unit, the air pressure adjusting unit and the electrode unit are electrically connected with the main control unit, and the electrode unit is attached to the skin to form a negative pressure cavity; the negative pressure cavity is communicated with the air pressure adjusting unit and the electrode unit; the main control unit is used for controlling the air pressure adjusting unit to roughly adjust the pressure of the negative pressure cavity to a first air pressure value; comparing the first air pressure value with a target negative pressure value to determine a first air pressure difference value; according to the first air pressure difference value, the air pressure adjusting unit is controlled to finely adjust the negative pressure cavity from the first air pressure value to the target negative pressure value so as to control the electrode unit to work. The negative pressure output by the skin treatment mechanism is adjusted with different precisions through the air pressure adjusting unit, so that the negative pressure adjusting precision of the skin treatment mechanism is improved, the pressure stability of the skin treatment mechanism is improved, and the service life of the skin treatment mechanism is prolonged.

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.