24 results about "Residual pressure" patented technology

The invention provides a quantitative characterization method and a quantitative characterization system for oil and gas transport efficiency of a sandstone lateral migration channel, and the method comprises the steps: obtaining a contour line included angle and a target stratum inclination angle of each well position at two sides of a construction ridge or valley according to a target stratum top surface construction contour map, and constructing a construction ridge or valley transport index according to the contour line included angle; buoyancy borne by the target stratum of each well position is obtained according to the target stratum dip angle; obtaining the residual pressure difference gradient of each well position according to the target layer pressure plane distribution diagram; superposing the contour map of the top surface structure of the target stratum and the pressure plane distribution map to obtain an included angle between an inclined reverse extension line and a residual pressure difference gradient direction in the target stratum of each well position; obtaining the weighted average permeability and the porosity of the target layer of each well location, the ridge or valley construction conduction index of each well location, the buoyancy borne by the target layer, the residual pressure difference gradient and the included angle to construct comprehensive evaluation indexes of each well location; and quantitatively characterizing the oil and gas transport efficiency of the sandstone lateral migration channel by using the comprehensive evaluation indexes of each well location. According to the invention, the lateral conduction channel conduction efficiency can be evaluated visually, simply and conveniently.

The utility model discloses an atomization device for space purification. The atomization device comprises a spraying assembly, a pump, a pressure relief device and a control unit. The water outlet end of the pump is connected with the water inlet end of the spraying assembly, the water inlet end of the pump is connected with a water source, the water inlet end of the spraying assembly is connected with the pressure relief device through a water return pipeline, and the pump and the pressure relief device work alternately. The control unit is connected with the pump and the pressure relief device and determines the water shortage fault according to the load parameters of the pump. The pump and the pressure relief device of the atomization device work alternately, when the pump stops working, the pressure relief device is opened, the pressure relief device closes the water return pipeline at the moment, disinfection liquid enters the spraying assembly, the pressure in the spraying assembly is reduced through the pressure relief assembly, and the problem that when the pump stops working, the disinfection liquid flows into the spraying assembly is solved. The residual liquid in the spraying assembly drips in the form of water drops under the residual pressure; in addition, load parameters of the pump are obtained through the control unit and serve as judgment standards of the water shortage faults, and then real-time diagnosis of the water shortage faults of the atomization device is achieved.

The embodiment of the present application provides a spraying system, a control method and device, and a spraying equipment. The spraying system comprises a liquid pump, a first on-off valve and a control unit. The control unit is used for acquiring a physical parameter value of the spraying system, determining a working state of the liquid pump according to a relationship between the physical parameter value and a preset range of the physical parameter value, and controlling the liquid pump and the first on-off valve to work according to the working state. The technical scheme provided by the embodiment of the present application controls the spraying system to perform corresponding actions according to the working state of the liquid pump, so as to prevent air from entering the liquid outlet pipe, to remove the air in the liquid inlet pipe and the liquid pump as soon as possible, and to release the residual pressure in the liquid outlet pipe when the liquid pump is turned off. Thus, the air difficult to remove in the liquid outlet pipe and the dripping of the nozzle are prevented, the stability of the spraying system is improved, the liquid outlet pipe is still full of liquid under the condition that the liquid pump is stopped for a long time, and the accuracy and timeliness of the spraying action are realized.

This invention provides a method for dynamic prediction of cement slurry weight loss in long inclined vertical well sections. The method includes: calculating the effective bottom hole pressure P during the cement slurry weight loss process. b Effective pressure at the bottom of the well, P b The calculation formula is: P b = P0 + P1; where P0 is the liquid column pressure at the top of the cement slurry; P1 is the effective pressure of the cement slurry; the calculation of the effective pressure P1 of the cement slurry includes determining the remaining pressure P after the cement slurry gels and loses weight, taking into account the eccentricity of the tailpipe and the downhole temperature and pressure. sy The residual pressure P after the cementation and weight loss of the mud obtained by this invention sy The calculations are more consistent with the gelation and weight loss characteristics of cement slurry under complex downhole conditions, effectively ensuring the accuracy of dynamic prediction of cement slurry weight loss.

The present invention discloses an adaptive filling system capable of multi-stage pressure regulation and a pressure regulation method thereof. The system includes a control module, a pressure relief module and an energy-consuming pressure reduction module connected sequentially to a filling pipeline between boreholes. The pressure relief module includes a pressure relief unit and a first bypass line connected in parallel to the filling pipeline. The energy-consuming pressure reduction module implements different levels of pressure reduction measures by connecting multiple stages of energy-consuming pressure reduction units and a second bypass line in parallel in the filling pipeline. Valves are provided on the pressure relief unit, the first bypass line, each stage of the energy-consuming pressure reduction unit, and the second bypass line. The control module obtains the location information of the mine in real time, and obtains the height difference between the filling preparation station and the mine based on the location information to obtain the residual pressure head P. The valves of each bypass line, the pressure relief unit, and the energy-consuming pressure reduction unit are controlled based on the residual pressure head P. The present invention can perform multi-stage automatic pressure regulation based on the residual pressure head of the mine, reducing failure phenomena such as pipe burst, excessive jet velocity at the outlet, and pipe blockage.

A method of forming an antifriction layer (3 ') on a shaft member (1) using a hot isostatic pressing process, comprising the steps of: 1) providing a sheath (5) having an inner space in accordance with the shape of an integral blank in which the shaft member (1) and the antifriction material (3) are intended to form; 2) assembling the shaft component (1) and the antifriction material (3) in a sheath (5) according to the shape requirement of the integrated blank; (3) degassing and sealing the sheath, and enabling the residual pressure in the sheath to be lower than a preset vacuum pressure threshold value; (4) hot isostatic pressing treatment is conducted on the sheath provided with the shaft component and the antifriction material, so that metallurgical bonding of the antifriction material and the shaft component is achieved; and (5) the sheath is removed, and follow-up machining is conducted on the integrated blank obtained after metallurgical bonding according to needs. Wherein the anti-attrition material is a metal foil made of an anti-attrition metal material. In addition, the invention also provides a shaft member (1) formed by adopting the method and a sliding bearing (10) comprising the shaft member.

A method for determining the critical physical properties of natural gas injection into tight reservoirs within overpressure zones. First, convert the mercury injection displacement pressure value of the reservoir into the gas-water displacement pressure value during the gas drive water process under geological temperature and pressure conditions, and establish the gas-water displacement pressure distribution profile during the gas drive injection process of the tight reservoir. Then, determine the natural gas accumulation time and the paleo-burial depth of the corresponding strata. Next, select sandstone samples rich in gas inclusions under a polarizing microscope to determine the paleo-pressure and residual pressure of the strata during the natural gas accumulation period. Then, determine the paleo-pressure structure of the strata. In a single overpressure system, construct a trend line of the residual pressure change gradient, that is, the effective injection power trend line. Finally, superimpose the effective injection power trend line on the converted gas-water displacement pressure distribution profile to divide the distribution intervals of effective injection and ineffective injection reservoir samples, and determine the critical physical property limit value of natural gas injection into tight reservoirs within overpressure zones. The present invention realizes the quantitative evaluation of the effectiveness of natural gas injection into deep overpressure tight reservoirs.

The invention provides a data center water cooling system residual pressure power generation method and system.The method comprises the steps that the pressure difference of a main water supply and return main pipe is detected in real time, and when the pressure difference of the main water supply and return main pipe is within a preset first pressure difference range, pressure difference recovery and power generation of the main water supply and return main pipe are triggered; the pressure difference of the precision air conditioner water supply and return branch pipe is detected in real time, and when the pressure difference of the precision air conditioner water supply and return branch pipe is within a preset second pressure difference range, precision air conditioner branch pipe pressure difference recovery and power generation are triggered; the pressure difference of the main pipeline valve is detected in real time, and when the pressure difference of the main pipeline valve is within a preset third pressure difference range, pressure difference recovery and power generation of the main pipeline valve are triggered; the vertical pressure difference generated by the chilled water vertical pipes between the floors due to the building height difference is used for triggering vertical pressure difference recovery and power generation between the floors. The method and system can solve the problems that an existing residual pressure power generation technology does not cover a complex scene of a data center water cooling system, energy waste is caused, and further improvement of the overall energy efficiency of a data center is limited.

The present invention relates to the technical field of industrial circulating water pipe pressure regulation, and specifically to a main pipe excess pressure power generation method and system based on AI adaptive control. The present invention collects the water pressure and voltage data of each branch pipe valve in time series, and calculates the relevant change factors according to the water pressure and voltage changes in a preset time range. The energy loss rate of each branch pipe valve is obtained based on the factor difference of adjacent branch pipe valves. A total loss function under different main pipe pressures is established, and the loss factor is derived from it. By comparing the change trend and numerical difference of the loss factor under each pressure, the optimal main pipe pressure corresponding to the minimum energy loss is determined. The main pipe excess pressure is regulated accordingly. The present invention can determine a more suitable main pipe pressure range, so that the industrial water circulation system is always in a low-loss and high-energy-utilization state.

The invention relates to the technical field of metal hose inspection and detection, in particular to a metal hose gas pressure loss test method and system, and the method comprises the steps: S101, carrying out drying treatment on gas, S102, carrying out dynamic pressure adjustment on the gas, S103, carrying out data acquisition and analysis, and S104, outputting a dynamic pressure loss coefficient and an error analysis result. Step S105, adjusting a preset pressure gradient or a flow set value according to an error analysis result until the error analysis result accords with a simulation verification threshold value, and step S106, closing gas supply, releasing residual pressure of the pipeline, and checking the sealing performance of the pipeline and the reset state of the valve; according to the invention, the problems of gas compressible flow characteristic simulation distortion, inconvenient storage tank fixation and condensation interference caused by insufficient drying treatment due to adoption of incompressible fluid in a traditional metal hose pressure loss test are solved; and the problems of poor test stability and simulation analysis errors caused by incomplete data of a single-side metering mode and lack of dynamic cooperative regulation and control are solved.

The application discloses a differential pressure type gas pipeline leakage measuring and controlling device and method, and relates to the technical field of gas pipeline safety monitoring. The device comprises an inlet electromagnetic valve, an outlet electromagnetic valve, a differential pressure transmitter, a control module and a communication module; the two valves are connected in series along the airflow direction, and the differential pressure transmitter collects the differential pressure signal between the two ends of the outlet electromagnetic valve. In the on state, the differential pressure signal is collected to identify large leakage and medium leakage; in the off state, the differential pressure change is collected through a tightness test to identify large and small micro-leakage. The method is divided into a non-disturbance tightness test and a disturbance tightness test, and is automatically executed in a non-gas use period. The method has high sensitivity, low false alarm rate and does not affect the gas use of users. The application can cover all scenarios of courtyard, building, vertical pipe, household, overhead and buried gas pipelines, effectively solves the problems that the prior art cannot identify large and medium leakage with high residual pressure, has insufficient sensitivity and is interfered by tests, and improves the operation safety of the gas pipeline.

The present application relates to the field of seawater desalination, and in particular to a device for utilizing the residual pressure of reverse osmosis concentrated brine for seawater desalination, comprising: a reaction mechanism comprising a fixed portion and a rotating portion, the fixed portion being provided with a concentrated brine inlet, a residual pressure inlet, a carbon dioxide waste gas inlet and outlet, the residual pressure inlet and outlet being located at both ends of the rotating portion, and a reaction chamber being provided in the rotating portion; a screening mechanism for receiving reacted solid particles and water, and screening solid particles with a size within a set range; a cleaning mechanism for frictionally flushing the ultrafiltration membrane with solid particles and water between the screening mechanism and the ultrafiltration membrane; and a cleaning mechanism comprising a first liquid inlet pipe between the screening mechanism and the water inlet pipe. The present application uses the residual pressure of the secondary reverse osmosis brine to drive the primary reverse osmosis concentrated brine to react with carbon dioxide to generate solid calcium carbonate particles, and uses the solid particles and the clean brine produced by the secondary reverse osmosis to clean the ceramic ultrafiltration membrane. While achieving energy utilization and carbon emission reduction, it can also enhance the cleaning effect of the ceramic ultrafiltration membrane.

The high-pressure-resistant plastic pipe comprises a pipe body, the pipe body is sequentially provided with a flow guide layer, a buffer layer, a reinforcing layer and a protective layer from inside to outside, protrusions used for flow guide are integrally formed on the inner wall of the flow guide layer, and flow dividing cavities are formed in the protrusions at intervals. And a water inlet and a water outlet are respectively formed in the bulge and correspond to the shunting cavity. Through the collaborative design of the flow guide layer, the buffer layer, the enhancement layer and the protection layer, step-by-step dissolution of pressure and efficient regulation of water flow are achieved, protrusions of the flow guide layer are matched with the flow dividing cavities, water flow impact is weakened, turbulent flow is avoided, stepped absorption of the pressure is achieved through the gradient honeycomb structure of the buffer layer, and the flow dividing effect is improved. The three-dimensional stress network of the reinforcing layer disperses residual pressure, finally, the risk of local stress concentration of the pipe body is greatly reduced, compared with a traditional single-structure pipe, the operation stability under the high-pressure working condition is remarkably improved, and the problems of cracking and leakage caused by pressure overload are effectively avoided.

The utility model discloses an automatic pressure relief sealing valve for birch juice transport vehicle, including valve seat, both sides of the top of valve seat all are fixedly connected with connecting seat, be provided with water delivery cavity in the valve seat and connecting seat, the top fixedly connected with valve body of connecting seat, the bottom of valve seat is provided with water inlet, water inlet is linked together with water delivery cavity, the bottom of one side of valve body is provided with water outlet, the top of valve body is provided with drain in water outlet, the inside movable joint of valve body has the piston, the top of piston is provided with valve rod, the utility model relates to valve technical field, solved in the prior art, the valve after closing water supply, in the equipment use process, often can accumulate certain pressure in the inside pipe, if these residual pressure does not release in time, possibly cause damage to the valve itself, also can influence the stable operation of entire water supply system, even cause the problem of security hidden danger.

The intelligent residual pressure monitoring device comprises a residual pressure sensor, a mounting plate, a sealing cover, a cover opening and closing control mechanism, a single-chip microcomputer, an electromagnetic valve and a pump machine, the residual pressure sensor is mounted on the surface of the mounting plate, the sealing cover is mounted on the mounting plate, the residual pressure sensor is covered with the sealing cover, the cover opening and closing control mechanism is connected with the sealing cover, and the single-chip microcomputer is connected with the electromagnetic valve. The sealing cover is sequentially connected with an electromagnetic valve and a pump machine through a pipeline, and the residual pressure sensor, the cover opening and closing control mechanism, the electromagnetic valve and the pump machine are all electrically connected with a single chip microcomputer; according to the technical scheme, the cover opening and closing control mechanism closes the sealing cover, standard pressure (such as 0Pa, 50Pa and 100Pa) is generated and injected into the sealing cover for calibration reference under the cooperation of the pump machine and the electromagnetic valve, the output of the residual pressure sensor is corrected through linear regression, data before and after calibration are compared, and calibration is repeated if the error is greater than 1Pa, so that automatic calibration of the residual pressure sensor is realized, and the calibration accuracy is improved. And the reliability of the residual pressure monitoring device is improved.

This invention provides a method for calculating the minimum bottom hole residual pressure P during the weight loss process of cement slurry in a long inclined vertical well section. b The ultimate pressure loss ΔP caused by the liquid column pressure P0 at the top of the cement slurry and the reduction in the volume of the cement slurry. ss The ultimate residual pressure P after cement slurry sets and loses weight sy It is determined that it satisfies P. b =P0+P sy -ΔP ss The present invention takes into account the effects of tailpipe eccentricity and cement slurry hydration when calculating the minimum bottom hole residual pressure, which effectively improves the accuracy of the calculation of the minimum bottom hole residual pressure.

The invention discloses an urban gas pipe network leakage accident active controlled emission duration calculation method, and relates to the technical field of gas leakage emergency processing, and the method comprises the steps: obtaining an emergency valve closing position of a gas pipe network leakage accident, obtaining a plurality of emission ports based on the emergency valve closing position, and constructing an emission time sequence function based on the opening time of the emission ports; establishing a pipeline residual pressure-diffusion flow rate-diffusion time relational expression; constructing a diffusion working condition critical flow state duration calculation model, and establishing a judgment rule of a gas flow state in a gradual diffusion process; judging the gas flow state in the gradual diffusion process based on a judgment rule, and constructing a gradual diffusion process pipeline residual pressure calculation model to obtain the pipeline residual pressure based on a judgment result and the relational expression; according to the method, a gas pipe network multi-point emission duration calculation model is constructed, the total emission duration of the target pipeline is obtained, and the problem that the emission duration accuracy is low due to the fact that an existing gas pipe network gas emission duration calculation method adopts single-point emission calculation is solved.

The utility model relates to the technical field of perfusion, in particular to a pressure maintaining perfusion device which comprises a storage box used for storing materials to be perfused. The two ends of the conveying pipe communicate with the storage box and the outside correspondingly; the pressurizing part is communicated with the storage box, and is used for pressing gas into the storage box to pressurize the storage box, so that the to-be-filled material in the storage box is conveyed to the outside through the conveying pipe; the residue discharging pipe is arranged on the storage box, the residue discharging pipe is communicated with the outside, the residue discharging pipe is used for discharging the to-be-poured material and / or the cleaning fluid in the storage box, and a residual pressure release valve is arranged on the residue discharging pipe and used for releasing residual pressure after the device is used. A traditional dumping type pouring mode is adjusted into an integrated quantitative pressure pouring mode, it can be guaranteed that a proper air pressure value is kept in the device through the pressurizing piece and the residual pressure release valve, pouring materials are stably discharged, and the device is high in flexibility, convenient to move, capable of reducing the operation difficulty, high in pouring efficiency, not prone to spilling and leaking and suitable for being used on ships.

The invention relates to the technical field of industrial circulating water pipe pressure adjustment, in particular to a main pipe residual pressure power generation method and system based on AI self-adaptive control. Water pressure and voltage data of each branch pipe valve in a time sequence are collected, and related change factors are calculated according to water pressure and voltage changes in a preset time range. And obtaining the energy loss rate of each branch pipe valve according to the factor difference of the adjacent branch pipe valves. Establishing a total loss function under different mother pipe pressures, and deriving the total loss function to obtain a loss factor; and determining the optimal mother pipe pressure corresponding to the minimum energy loss by comparing the change trend and the numerical value difference of the loss factor under each pressure. Therefore, the residual pressure of the main pipe is regulated. According to the method, a proper mother pipe pressure range can be determined, so that the industrial water circulation system is always in a low-loss and high-energy-utilization state.

The utility model belongs to the technical field of power generation devices, and particularly relates to an energy-saving power generation device utilizing residual pressure of a secondary water supply system, which comprises a shell, a power generation device and a power generation device, the cylindrical block is arranged in the shell, and the axis of the cylindrical block coincides with the axis of the shell; the cylindrical block rotates axially by taking the axis of the cylindrical block as an axis; the cylindrical block is provided with a first channel and a second channel which penetrate through the cylindrical block in the axis direction of the cylindrical block. A mounting groove is formed in the first channel, and a flow channel is formed in the second channel; the pipelines are arranged on the two opposite sides of the shell, and a water inlet and a water outlet are formed in the opposite positions of the pipelines respectively; and the power generation mechanism is arranged in the mounting groove. The utility model solves the problems that the water pressure is reduced and the water replenishing speed of the water tank is slowed down due to the fact that the existing power generation device is fixed in the pipeline for a long time for water flow power generation, and the water demand of residents in peak hours is difficult to meet.

A device for leak testing pressure tanks for gases, in particular hydrogen pressure tanks, designed for at least 300 bar, which device has a connection for a compressor and can fill the pressure tanks to be tested with a test gas up to the desired test pressure pT, which device comprises at least one test chamber for accommodating a pressure tank, in which test gas escaping from the pressure tank filled up to the test pressure pT can be collected and detected, and which can empty the test gas from the tested pressure tanks down to a desired residual pressure px, wherein several pressure tanks can be accommodated in the device simultaneously, wherein at least n connections are provided for filling pressure tanks to be tested and at least n-1 connections are provided for emptying pressure tanks that have already been tested, and the number n is at least n=3,wherein each of these connections for emptying is connected to at least one connection for filling via a corresponding gas line which can be shut off by a controllable valve, and wherein the device is designed such that each pressure tank to be tested can be gradually filled with test gas in several cycles from a pre-pressure p1 to an increased pressure pn by being connected successively in individual cycles to various tested pressure tanks via the gas lines and thus test gas can flow from the tested pressure tanks into the pressure tank to be tested in each individual cycle.

The invention relates to a device for checking the seal of pressure tanks for gases, in particular hydrogen pressure tanks, which are designed for at least 300 bar. The device has a connection for a compressor and can fill the pressure tanks to be checked with a test gas up to a desired test pressure pT; the device comprises at least one test chamber which is designed to receive a pressure tank and in which test gas leaking from the pressure tank filled to the test pressure pT can be collected and detected; and the device can empty the test gas out of the checked pressure tank to a desired residual pressure px. Multiple pressure tanks can be received simultaneously in the device, wherein at least n connections are provided for filling pressure tanks which are to be checked, and at least n-1 connections are provided for emptying pressure tanks which have already been checked, the number n equaling at least 3. Each of the emptying connections is connected to at least one respective filling connection via a corresponding gas line which can be blocked by a controllable valve, and the device is designed such that each pressure tank to be checked can be gradually filled with test gas from an initial pressure p1 up to an increased pressure pn in multiple cycles in that the pressure tanks to be checked can be connected, one after the other in individual cycles, to different checked pressure tanks via the gas lines, and therefore test gas can flow from the checked pressure tanks to the pressure tanks to be checked in each individual cycle.

A high-performance adaptive adjustment pressurization conversion recovery device belongs to the field of sewage treatment. This device uses the pressure difference on both sides of the rotor to drive rotation, efficiently recovers the residual pressure energy of high-pressure concentrated liquid, avoids the energy consumption of traditional motor drive, reduces the overall energy consumption of the system, improves the energy utilization rate, and saves the operation cost. Its adaptive sealing system dynamically adjusts the sealing gap according to the liquid pressure. The sealing ring of the diversion hole keeps in contact with the inner wall of the inlet and outlet diversion parts under the action of spring force and liquid pressure to prevent leakage, and is applicable to fluid containing particles. It can adapt to fluids with different pressures, flows and compositions, and can also be dynamically adjusted through the sealing system for fluid containing particles to ensure stable operation. Due to the adaptive sealing adjustment, the adaptive sealing rotor end face, and the adaptive adjustment of the leakage gap, it solves the blockage problem of dealing with large particles.

The invention belongs to the technical field of power generation control, and provides a flow control system and method for excess pressure power generation of a water plant. Acquiring a purified water flow data set and a purified water pressure data set of an original purified water discharge pipeline of the sewage treatment plant within a specified duration, and predicting to obtain a purified water discharge stability level; a flow regulation and control model is obtained according to purified water discharge stability grade matching; the flow control model receives the first real-time flow of the main pipeline flowmeter, the real-time water pressure data of the pressure meter and the second real-time flow of the bypass pipeline flowmeter, the flow control model outputs the predicted first opening degree of the main pipeline electric valve and the predicted second opening degree of the bypass pipeline outlet electric valve, and the first opening degree and the second opening degree are executed. The stability of the output electric power of the water purification residual pressure power generation device can be ensured.