19 results about "Leakage flow" patented technology

A centrifugal compressor is provided. The system includes an overall inlet passage 1, adjustable inlet guide vanes 2, an impeller 3, a variable diffuser 4, a volute casing 5, and an overall outlet passage 6. A tip gap 10 is provided between the impeller and an impeller cover, and a disk cavity is formed between the side of the impeller far from the adjustable inlet guide vanes and the impeller cover. Measurement point densification areas are provided within the impeller, tip gap, and disk cavity, and flow field measurement points are provided at intervals along the fluid flow direction within the impeller, tip gap, and disk cavity, with the spacing between the flow field measurement points located within the measurement point densification area being smaller than the spacing between the flow field measurement points located outside the measurement point densification area. The loss mechanism of the internal leakage flow field between the impeller and the blade tip gap and the external leakage flow field of the disc cavity is studied in detail, and the coupling mechanism of the main flow and leakage flow in the impeller is fully taken into consideration, which improves the granularity, authenticity and reliability of the measurement results and enables the collection of more and more accurate fluid data in the high-density measurement point area.

The invention discloses a PI regulator with a leakage compensation function and a null drift suppression method thereof.According to the PI regulator, a leakage observer and a leakage PI compensator are embedded in a classic PI regulator, the leakage observer executes a real-time leakage flow estimation algorithm and inputs the estimated real-time leakage flow into the leakage PI compensator, and the leakage PI compensator and the leakage observer are connected in sequence. The leakage PI compensator calculates leakage compensation current according to the real-time leakage flow and inputs the leakage compensation current into the adder, the adder adds the output control signal and the leakage compensation current to obtain a control current instruction, and the control current instruction is input into the servo amplifier and controls displacement of the oil cylinder through the servo valve. According to the method, a leakage observer and a leakage PI compensator are used for calculating leakage flow and leakage compensation current, saturation judgment and current amplitude limiting are executed, and corresponding leakage compensation current is output. According to the PI regulator and the zero drift suppression method thereof, oil cylinder position drift is greatly reduced, zero return overshoot is completely eradicated, manual calibration is canceled, one-time calibration is effective for a long time, and the equipment cost is reduced.

The application provides a tubing leakage DAS monitoring physical simulation experiment device and experiment method, and belongs to the technical field of oil and gas well safety monitoring.The application constructs a physical simulation experiment device composed of a distributed optical fiber acoustic wave monitoring system, a wellbore leakage simulation system, a liquid supply system and a waste liquid recovery system, sets a leakage point simulation assembly with a replaceable leakage channel at a preset position of the simulated wellbore, simulates tubing leakage working conditions under different leakage point positions, leakage point forms, injection flow rates and fluid types, collects acoustic wave profiles of the whole wellbore section by using the distributed optical fiber acoustic wave monitoring system, and constructs a quantitative relationship model of leakage flow rate and acoustic wave energy.The application can simulate complex leakage working conditions of oil and gas wells, realizes rapid replacement and comparison experiments of various leakage point forms, overcomes the limitation of single leakage point type of traditional experiment devices, and provides experiment support for accurate positioning and quantitative evaluation of tubing leakage points based on optical fiber acoustic wave monitoring.

The invention provides a breather valve pressure detection method and system, and belongs to the technical field of special valve detection.The method comprises the steps that based on PLC programming control, accurate output of positive pressure and negative pressure is achieved through a high-precision electric control proportional valve, and online detection and offline detection dual-mode operation is supported; the opening state of a breather valve is automatically recognized through pressure difference judgment logic, and automatic collection of positive and negative pressure operation pressure and leakage flow is achieved in combination with sensor zero drift correction and storage tank pressure deviation correction during online detection; and meanwhile, multiple times of data acquisition and averaging are supported, a report is automatically generated and exported from detection data, and remote monitoring can be realized. The system is simple in hardware structure and stable in operation, the detection precision, efficiency and data reliability of the breather valve are greatly improved, and the technical blank of online high-precision detection of the breather valve is filled.

The invention discloses a measuring weir leakage flow monitoring method and device based on actual measurement calibration. The method comprises the steps that multiple sets of actual measurement water level values and corresponding actual flow values of a measuring weir under different working conditions are obtained; fitting based on the actually measured water level value and the actual flow value to generate an exclusive water level-flow relation model; constructing a high-density water level-flow lookup table covering a full water level range by using an interpolation algorithm; automatically collecting a real-time water level value of the measuring weir and performing interpolation calculation based on the lookup table to obtain a corresponding flow value; the flow value obtained through interpolation calculation and the flow value calculated based on the exclusive water level-flow relation model are compared and verified, and the flow value consistent with the comparison result is output. According to the method, the precision and reliability of measuring weir leakage flow monitoring can be remarkably improved, calculation errors caused by weir body shape deviation and flow state complexity in a traditional theoretical formula are effectively overcome, and long-term automatic high-precision flow monitoring is achieved.

The application discloses a kind of inner leakage flow signal curve judgment method, device, medium and electronic equipment.The method comprises: by switching to small flow meter and closing the reversing valve except flow meter reversing valve by flow meter reversing valve, the rated positive value and rated negative value of control signal are obtained, so as to obtain inner leakage flow signal curve;For different throttle, by controlling the state of each reversing valve, the rated positive value and rated negative value of control signal are obtained, so as to obtain corresponding throttle flow signal curve;According to the throttle flow signal curve, the accuracy of the inner leakage flow signal curve is judged.The technical scheme provided by the application can improve the accuracy of judging inner leakage flow signal curve.

The utility model relates to the technical field of solar cell manufacturing, in particular to a leaked liquid collecting device and groove type cleaning equipment, the leaked liquid collecting device comprises a collecting main body and a spraying part, the collecting main body is provided with a first collecting cavity, the first collecting cavity is used for collecting leaked liquid of a cleaning groove, and a collecting hole is formed in the bottom wall forming the first collecting cavity; the spraying part is arranged in the collecting main body, and the spraying part is used for flushing leaked liquid in the first collecting cavity into the collecting holes by spraying liquid; and the collecting hole is used for being communicated with a recycling box, and the collecting hole is used for guiding leaked liquid in the first collecting cavity into the recycling box. The device can have the following advantages that when the cleaning tank leaks, leaked liquid can flow into the first collecting cavity, then through the flushing effect of the spraying part, the leaked liquid is rapidly collected into the recycling box through the collecting holes, consumption of manual treatment resources is reduced, and leaked liquid recycling is safer, more convenient and faster.

The utility model relates to a triggering alarm system based on ore pulp running, which comprises a leakage flow guide pipe and a sensing ball arranged below a circulation opening of the leakage flow guide pipe, a connecting long rod is fixedly arranged on the outer side of the sensing ball, one end, far away from the sensing ball, of the connecting long rod is fixedly connected with a connecting disc, the connecting disc is connected with a connecting ring in an inserted mode, and the connecting ring is connected with the leakage flow guide pipe. The outer side of the connecting ring is fixedly connected with a connecting rotating rod, the connecting rotating rod is rotatably connected with a rotating plate, a supporting column is arranged on the side edge of the rotating plate in a penetrating mode, an adjusting rod is arranged on the side edge of the rotating plate, a controller is inserted into the end, away from the rotating plate, of the adjusting rod, and the controller is electrically connected with an air defense alarm through a cable. And the sensing ball is in electric signal connection with the air defense alarm. According to the ore pulp running and overflowing triggering alarm system, under the combined use of the sensing ball, the air defense alarm and the controller, the device has the alarm effect in two operation modes, and the reliability and stability of the device in ore pulp running and overflowing triggering alarm are improved.

The embodiment of the invention provides an ultrasonic gas leakage detection method and device, electronic equipment and a computer storage medium. The method is applied to an ultrasonic fuel gas speed measuring device, and the device comprises a first valve and a second valve which are arranged at the two ends of a fuel gas channel, and a first ultrasonic sensor and a second ultrasonic sensor which are arranged in the fuel gas channel. The method comprises the following steps: operating the first valve and the second valve, detecting a calibration time difference and a real-time time difference by using the first ultrasonic sensor and the second ultrasonic sensor, and calibrating the real-time time difference by using the calibration time difference to obtain a calibrated time difference; calculating the gas leakage flow velocity according to the calibrated time difference; according to the ultrasonic gas leakage detection method, the gas leakage detection precision can be improved, and interference caused by time drift or temperature drift is overcome.

TITLE: DEVICE FOR STOPPING A LEAKAGE FLOW ON A FLUID PIPELINE The device (30) for stopping excess flow of a leak on a fluid pipeline comprises: - a seal holder having a tubular channel, - a lip seal that is leak-proof to the fluid flowing in the pipeline, - a plug (35) opposite the upstream end of the tubular channel, - an anchoring means configured to anchor the seal holder in the predetermined pipeline, and - a plug seat (34) mounted on the seal holder and having lateral openings for the passage of fluid towards the head (351) of the plug and towards the upstream end of the seal holder.The shutter head extends from a movable body (353) in a guide (32) comprising the return means (33) and wherein the shutter seat and the guide have, on their outer surface, a flow deflector (323, 342) configured to reduce fluid drag on the shutter head, this flow deflector being supported by the shutter guide and by the shutter seat and having a conical shape whose apex is located in the shutter guide. (Figure for abbreviation: Figure 4).

The application relates to the field of gas turbine turbine blade cooling technology and discloses a slot structure applied to guide vane leakage flow and a cooling device, which comprises a first slot surface and a second slot surface, a cooling channel is formed between the first slot surface and the second slot surface, and the cooling channel is used for guiding cooling gas; wherein a plurality of grooves are arranged on the first slot surface in a direction perpendicular to the flow direction of the cooling gas, a convex position is formed between two adjacent grooves, the convex position comprises two side edges, the two side edges extend in a direction away from the first slot surface and meet to form an end point position, a plurality of end point positions are located on the same plane and are parallel to the second slot surface, and the grooves and the convex position are symmetric with respect to the center line of the side edge. The application can make the cooling gas better cover the surface of a turbine guide vane edge plate and an end wall, has better circumferential covering capacity, has better cooling effect, and can reduce the cooling gas consumption on the basis of achieving the same cooling efficiency.

The polishing solution storage equipment comprises a main tank body and a protective cover, a plurality of branch tank bodies are evenly installed in the main tank body, storage cavities are formed in the branch tank bodies, a feeding branch pipe is installed on one side of the top of each branch tank body, and a discharging branch pipe is installed on the other side of the top of each branch tank body. And one end of the feeding branch pipe is connected with the feeding main pipe. The device has the beneficial effects that through a dual protection structure of outer rigid protection and inner flexible buffering, a monitoring-flow guiding-recycling integrated leakage emergency system and adaptive design of multi-tank independence and automatic control, the core advantages of being good in protection effect, efficient in leakage flow guiding and high in practicability are achieved; the problems that a traditional polishing solution storage device is prone to collision and leakage, large in loss after leakage, prone to layering of the polishing solution and poor in adaptability are effectively solved, the storage safety, stability and operation and maintenance convenience of the polishing solution are remarkably improved, and the high-precision and multi-process requirements of silicon carbide substrate polishing are met.

This invention discloses a method for controlling the leakage velocity of phase change materials (PCMs) under high flow rates, comprising: acquiring initial configuration data of the target leakage channel and characteristic model parameters of the PCM; real-time acquisition of fluid state observation sequences of the leakage channel; inverting the real-time equivalent geometric parameters and flow field characteristic parameters of the channel based on the observation sequences; estimating the residence time window of the injected grout in the channel; estimating the phase change solidification time window by combining the characteristic model parameters and the observation sequences; determining the control criterion index based on the ratio of the residence time window to the phase change solidification time window; generating an adaptive control vector based on the control criterion index, driving the actuator to adjust the injection parameters until the flow rate control termination condition is met. This invention utilizes the solidification and residence of the PCM in the leakage channel to form a hindrance, reducing the water flow velocity in the high-velocity leakage channel to the workable range of traditional grouting methods, creating low-velocity conditions for subsequent seepage prevention treatment.

The invention relates to the technical field of valve detection, in particular to a laser sensor measurement system for safety valve leakage quantity verification, which comprises a mounting base, a laser detection component and a bubble generation assembly, the bubble generating assembly comprises a guide rail assembly, a gas circuit assembly, a sealing valve element, an unlocking assembly and a locking transverse rod. The guide rail assembly is arranged in the middle of the rear portion of the mounting base in the longitudinal direction. The gas circuit assembly is arranged in the guide rail assembly in a sliding mode. The sealing valve element comprises a valve element body and a locking assembly. According to the measuring system, the leakage flow can be displayed in real time, and threshold value feedback is achieved; leakage airflow of the safety valve can be intercepted through the sealing valve element, the leakage airflow of the safety valve can also be detected by detecting the intercepted airflow, and due to the fact that the intercepted airflow is small, the floating ball can be located at the low position in the air outlet pipe; the positive correlation between the height of the floating ball in the position range and the size of the airflow which can be intercepted is tighter, and the measurement result is more accurate.

This application relates to the field of safety valve fault monitoring technology, specifically to a method and system for detecting faults throughout the entire lifecycle of safety valves. It aims to address the problems of traditional methods relying on leakage flow monitoring, which cannot detect latent faults such as valve core jamming and spring fatigue, leading to frequent sudden safety accidents. Furthermore, it addresses the issue that power supply systems often employ a single power generation mode, resulting in energy storage module depletion and monitoring interruptions in low-leakage scenarios. This application effectively solves the problems of missing latent fault monitoring and unstable power supply in safety valves. Multi-dimensional data acquisition can detect spring force decay and abnormal valve core movement in advance, preventing faults from escalating into serious leaks. The composite power supply system maintains basic monitoring during the non-leakage phase and rapidly replenishes energy during the leakage phase, ensuring continuous operation throughout the entire lifecycle. Model analysis results can guide maintenance personnel to accurately locate faulty components, reducing unnecessary downtime for maintenance.

The embodiment of the invention provides a gas compressor rotor-oriented clearance leakage flow simulation method and device, computer equipment and a medium, and the method comprises the steps: under the condition that a preset number of grids are arranged in a blade tip clearance area, calculating the clearance leakage flow of a blade tip; determining the influence relationship between the relevant speed, the relevant temperature and the relevant pressure of the blade at the blade tip clearance of the gas compressor under different working conditions and the blade tip clearance reduction proportion and / or clearance leakage flow; according to the influence relation, a proportion simulation model is generated based on the relevant speed, the relevant temperature and the relevant pressure of the blade at the blade tip gap; obtaining the relevant speed, the relevant temperature and the relevant pressure of a blade at the real blade tip clearance of the to-be-simulated gas compressor, and inputting the relevant speed, the relevant temperature and the relevant pressure into the proportion simulation model to obtain the real blade tip clearance reduction proportion; reducing the blade tip clearance based on a real blade tip clearance reduction proportion; and simulating the gap leakage flow based on the preset number of grids. According to the scheme, the simulation calculation efficiency and accuracy of the gap leakage flow can be considered.

The application discloses a kind of sealing performance online detection methods of sealing element, specifically related to industrial sealing element quality detection technical field, for solving the benchmark deviation and misjudgment problem caused by ignoring installation stress influence in existing detection method;Method constructs sealing contact interface phase field model by real-time acquisition installation stress data, analyzes crack network permeability to predict leakage diffusion path;According to the spatial correlation of stress gradient and leakage density, high / low stress sensitive area is divided, and differential signal acquisition is implemented;By topological data analysis, extract barcode entropy value and generate compensation priority sequence, dynamically correct detection benchmark;Finally, based on the regional weight fusion compensation signal, output high-precision pressure distribution and leakage flow trend result;Installation stress and leakage signal cross-field coupling analysis are realized, and the accuracy and reliability of sealing performance detection under complex working conditions are improved.

This application discloses a flow sensing and sluice gate dynamic balancing leakage and seepage detection device, including a detection pipe with its two ends connected to an upstream water flow channel and a downstream water flow channel, respectively; an eccentric impeller assembly, rotatably installed inside the detection pipe, comprising an impeller body and at least one eccentric mass block; a bearing assembly connected to the eccentric impeller assembly, supporting the eccentric impeller assembly; a vibration detection module installed on the outer wall of the detection pipe, corresponding to the position of the bearing assembly; and a control module connected to the vibration detection module. Thus, the leakage flow rate is converted into a vibration signal through the eccentric impeller, and multi-dimensional vibration feature fusion and deep learning decoupling are used to achieve a three-in-one intelligent detection system that accurately measures leakage and seepage, identifies water flow patterns in real time, and diagnoses the device's health status online. This overcomes the shortcomings of traditional methods, such as single function, poor anti-interference ability, and inability to self-diagnose.

The application relates to the technical field of display, and particularly provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate and an isolation structure located on one side of the substrate. The isolation structure is surrounded to form a plurality of isolated openings. The isolation structure comprises a supporting part and an isolation part. The supporting part is located on the side of the isolation part close to the substrate. The side of the isolation part close to the substrate has a first surface. The side of the isolation part away from the substrate has a second surface. In the direction perpendicular to the surface where the substrate is located, the supporting part is in contact with the first surface. The orthographic projection of the supporting part on the substrate is located in the orthographic projection of the first surface on the substrate. The orthographic projection of the first surface on the substrate is located in the orthographic projection of the second surface on the substrate. The display panel can improve the problem of leakage flow, and is helpful to improve the display effect and use performance of the display panel.