2164 results about "Submersible pump" patented technology

The invention relates to a marine fishery breeding work ship deep water taking device and method, the marine fishery breeding work ship deep water taking device comprises a water taking cantilever, a submersible pump, a guide roller, a rolling part and a lifting device, the water taking cantilever is connected with a ship body through a rotation pair, and the water taking cantilever can stably descend underwater and keep the accurate water taking depth; the water taking method comprises the steps that the position and angle of a water taking cantilever are adjusted through a winding and unwinding winch, a temperature sensor at the water taking cantilever end monitors the seawater temperature in real time, and when the temperature reaches a preset value, a submersible pump is started to extract deep seawater; compared with a traditional method, the device has the characteristics of compact structure, simple operation, high efficiency and reliability; the problems that underwater butt joint is difficult, a hose is prone to damage and the like are solved, and operation efficiency and safety are remarkably improved; through the connection of the flexible short pipe, the flexibility and the stability in the water taking process are ensured, and meanwhile, the labor intensity of operators is reduced; the technology can be widely applied to marine fishery breeding, especially extraction of deep cold water resources, and has remarkable energy-saving, environment-friendly and economic benefits.

In some embodiments, a system for producing fluid from a well can include an electrical submersible pump (ESP) disposed in a wellbore of the well and configured to pump the fluid. The system may further include a distributed acoustic sensing (DAS) system, for example having an interrogator unit and a fiber optic cable extending downhole in the wellbore. An end of the fiber optic cable can be disposed downhole relative to the ESP. In embodiments, the system may further include a controller configured to receive data from the DAS system, process the data to detect a slug, determine a parameter of the detected slug, and alter operation of the ESP in response to determining that the parameter exceeds a threshold.

The invention relates to the technical field of oil exploitation, and provides a CFD-based electric submersible pump oil-gas-water three-phase flow adaptability analysis method and system, and the method comprises the steps: constructing a three-dimensional geometric model of an electric submersible pump, carrying out the initial grid division through CFD software, and optimizing the grid density through a self-adaptive grid refinement algorithm; setting oil well boundary conditions, a turbulence model and cavitation model parameters; steady-state and unsteady-state simulation calculation is carried out, and a flow field distribution diagram in the electric submersible pump is obtained; key performance parameters are extracted; simulating flow characteristics of oil-gas-water three-phase flow by adopting a turbulence model optimization algorithm based on multiphase flow coupling and combining a turbulence model, a multiphase flow model, an interphase turbulence correction term and an interphase interaction force model; and carrying out adaptability analysis on the oil-gas-water three-phase flow of the electric submersible pump. All-around technical support can be provided for design, operation and maintenance of the electric submersible pump, and technical progress and development of the oil exploitation industry are powerfully promoted.

The invention belongs to the technical field of oil well production management, and discloses an electric submersible pump well group management system and method based on digital twinning. According to the method, operation data of an electric submersible pump unit and environmental data in a shaft are collected in real time, a multi-scale digital twinborn model is constructed for the received data, and the mechanical structure and electrical characteristics of the electric submersible pump unit, the multiphase flow dynamic state in the shaft and geological pressure field data are obtained; trend prediction is carried out on operation parameters, energy efficiency indexes and health states of the multi-scale digital twin model of each well; through a machine learning algorithm and an expert knowledge base, trend prediction data is associated with a historical health database, early warning and intelligent diagnosis of equipment faults are completed, and a maintenance strategy is generated. The method can assist managers to make decisions based on the historical health database. According to the invention, unified management and intelligent well patrol of multiple well sites can be realized, and the oil well production management efficiency is greatly improved.

The invention discloses an intelligent energy efficiency estimation method and system for a submersible pump, and belongs to the technical field of submersible pump energy efficiency optimization, and the method comprises the steps of submersible pump data collection, submersible pump feature engineering, energy efficiency loss evaluation, conveying medium evaluation and submersible pump energy efficiency estimation. According to the invention, a dual-path comprehensive energy efficiency estimation method combining energy efficiency loss evaluation and conveying medium evaluation is adopted, and two intelligent functions are combined, so that multi-dimensional and whole-process accurate evaluation of the operation state of the equipment is realized, and the accuracy and reliability of energy efficiency estimation are improved; energy consumption loss evaluation is carried out by adopting a flow vibration analysis method based on fuzzy intensity, so that accurate identification and quantitative analysis of various loss characteristics under complex working conditions are realized, the equipment state monitoring sensitivity is improved, and the accuracy and reliability of energy efficiency loss evaluation are enhanced; a multi-factor medium correction coefficient calculation method combined with coupling loss graph neural network prediction is adopted to carry out conveying medium evaluation, and online intelligent perception and dynamic correction of medium characteristics are achieved.

The invention belongs to the technical field of intelligent control of electric submersible pumps, and discloses a ground control system and control method of an electric submersible pump. A sensor module of the system is used for collecting operation data of the electric submersible pump in real time; the intelligent calculation module is used for analyzing and calculating the collected real-time operation data of the electric submersible pump to obtain optimized control parameters; the control execution module is used for generating a corresponding instruction according to the optimized parameters and accurately adjusting the steering, rotating speed and stroke parameters of the servo motor; the real-time monitoring and feedback optimization module is used for monitoring the system state after execution of the control execution module in real time and judging whether system operation is abnormal or not according to a real-time monitoring result; and the alarm optimization adjustment module is used for dynamically optimizing the control strategy of the electric submersible pump based on the parameter abnormal condition fed back by the real-time monitoring module after the abnormal state of the system is detected. The control efficiency of the electric submersible pump is effectively improved, and the problem that in the prior art, a control method is low in efficiency is solved.

The invention discloses a well submersible pump hydraulic design data modeling method, which comprises five steps of sensing acquisition, hydraulic data enhancement, hydraulic performance prediction, intelligent material matching and modeling output, relates to the technical field of pump hydraulic modeling analysis, and particularly relates to a well submersible pump hydraulic design data modeling method and system. A physical information confrontation generative network is combined with a space-time Kriging interpolation algorithm to enhance three-dimensional flow field data; a multi-modal graph neural network fusing physical control loss is constructed, and dynamic prediction of performance indexes such as pump body efficiency, lift and net positive suction head is achieved; based on a corrosion-wear coupling model and a reinforcement learning algorithm, the service life, the cost and the machinability of candidate materials are evaluated, an optimal combination is intelligently recommended, and systematic support is provided for design of an efficient, low-cost and long-service-life submersible pump for a well.

The invention discloses a long-shaft submerged pump, and belongs to the technical field of submerged pumps, the long-shaft submerged pump comprises a shell, a double-shaft driving assembly is rotatably connected in the shell, the double-shaft driving assembly comprises a first driving shaft and a second driving shaft which are coaxially arranged, the first driving shaft is connected with a rotary driving assembly, the first driving shaft is fixedly connected with a first impeller, and the second driving shaft is fixedly connected with a second impeller. A first internal spline is fixedly connected to the inner wall of the first driving shaft, the second driving shaft comprises an upper shaft and a lower shaft, the upper shaft penetrates through the first driving shaft and is in sliding connection with the first driving shaft, a second convex ring, a first external spline and a second external spline are fixedly connected to the outer wall of the upper shaft, and the second convex ring is connected with a lifting driving assembly; the lower shaft is rotationally connected into the shell, a second impeller is fixedly connected to the outer wall of the lower shaft, and a second inner spline is fixedly connected to the inner wall of the lower shaft. According to the long-shaft submerged pump with the structure, the lift of the submerged pump can be adjusted without disassembling the submerged pump, and the long-shaft submerged pump is convenient and fast to use.

The invention relates to the technical field of pipeline joints, in particular to a connecting and locking pipe joint for quickly mounting a pump pipe of a portable submersible pump, which comprises a pipe head, a locking structure, a rotating structure, a taking and placing structure, an adjusting structure and a compensating structure, the pipe head can be quickly and firmly connected through the locking structure to adapt to different pipe pump intervals, the connection stability and the sealing performance are improved, the installation difficulty is reduced, and the installation time is shortened; through the rotating structure, the taking and placing structure and the adjusting structure, the pipe joint can be conveniently carried, meanwhile, the position and angle of the grip can be flexibly adjusted according to site requirements after installation, the pipeline joint is stably supported, and the working stability is enhanced; the compensation structure enables the connecting pipe to slide and rotate, when the length of the pump pipe is changed due to the water level or other factors, automatic compensation can be achieved, sealing performance and normal work can be maintained, connection of the connecting pipe and the drainage pipe can be assisted, the connecting efficiency is improved, it is ensured that the submersible pump continuously and efficiently pumps water in the water level fluctuation scene, and the maintenance workload is reduced.

The invention belongs to the technical field of underwater operation, and relates to a maintenance device for a lower hinged support of a dock gate and a construction method thereof. The device comprises a waterproof cover box, a diving barge, a hoisting system and a drainage assembly, the waterproof cover box comprises a cover body and a channel well, openings are formed in the bottom and the top of the cover body, the bottom face of the cover body is in sealed compression joint with the surrounding structure of the lower hinged support to be maintained, the channel well is connected to the opening in the top of the cover body in a sealed mode, and the top face of the channel well is higher than the water surface. The diving barge is provided with a plurality of hydraulic supporting legs capable of ascending and descending so that the diving barge can be supported in the horizontal door pit. The hoisting system comprises a tower frame and an arm frame which are arranged on the diving barge, and one end of the arm frame is located above the cover body and connected with the cover body in a pressing mode; the drainage assembly comprises a submersible pump and a drainage pipe, the submersible pump is arranged in the cover body, one end of the drainage pipe is connected with the submersible pump, and the other end is led to the water surface through the channel well. According to the method, a stable dry operation environment can be rapidly constructed at the dock gate lower hinged support to be maintained, rapid maintenance is achieved, pollution to a sea area is avoided, and operation safety is improved.

A method for controlling a permanent magnet (PM) synchronous motor in an ESP application is provided. A load angle of the PM motor is estimated. A voltage adjustment value is determined for the PM motor based at least on the estimated load angle of the PM motor. A voltage to be applied to the PM motor is determined based on the voltage adjustment value.

The invention relates to the technical field of submersible pumps, and discloses a submersible digital pump and a digital control system, the digital control system comprises a data acquisition module, a calculation module, an identification module, a strategy module and a control module; wherein the data acquisition module is used for acquiring operation parameters and state parameters of the submersible digital pump; the calculation module is used for calculating the operation efficiency and the efficiency deviation value of the submersible digital pump; the identification module is used for identifying the load responsiveness and the structure collaboration of the efficiency deviation value and identifying the low-efficiency operation condition of the submersible digital pump; the strategy module is used for formulating an efficiency adjustment strategy; and the control module generates a rotating speed control instruction based on the efficiency adjustment strategy, and adjusts the operation efficiency of the submersible digital pump in the low-efficiency operation condition based on the rotating speed control instruction. According to the application, intelligent identification and self-adaptive regulation and control of the operation efficiency of the submersible digital pump are realized, and the operation stability of the submersible digital pump is improved.

The invention discloses a regulation and control method, device and equipment for an electric submersible pump layered producing well simulation model and a medium, relates to the technical field of computers, is applied to an intelligent agent and comprises the steps that current state information of the current environment where the electric submersible pump layered producing well simulation model is located is obtained; determining a regulation action according to a depth deterministic strategy gradient algorithm and based on the current state information; the regulation action is a regulation preset parameter; the preset parameters are one or more of the motor operation frequency of the electric submersible pump layered producing well, the diameter of a wellhead oil nozzle and the opening degree of each layer of inflow control device; the electric submersible pump layered producing well simulation model is regulated and controlled based on the regulation and control action, and the working performance corresponding to the regulated and controlled model is determined; judging whether the working performance meets a preset condition or not; and if not, skipping to the step of acquiring the current state information corresponding to the current environment where the electric submersible pump layered producing well simulation model is located until the working performance meets the preset condition. The speed and precision of regulation and control can be improved.

The invention discloses an energy-saving and efficiency-improving submersible pump for an integrated pump gate. The energy-saving and efficiency-improving submersible pump comprises a gate body and a submersible pump body, the pump body part comprises an impeller, a rotating shaft and a pump shell, the inducer is arranged at the upstream end of the impeller, and the impeller comprises impeller blades and a hub; the device is characterized in that a step part is arranged on the peripheral surface of the lower end part of the hub, the inducer comprises inducing blades and an adjusting cylinder, the upper end of the adjusting cylinder is connected with the step part, the lower end of the adjusting cylinder is connected with an adjusting cap, a drainage cavity is formed among the adjusting cap, the adjusting cylinder and the lower end part of the hub, a first through hole is formed in the adjusting cap, and a second through hole is formed in the adjusting cylinder; third through holes are formed in the induction blades, and the third through holes penetrate to the blade tops of the induction blades. The suction performance of the submersible pump can be improved, the influence of boundary layers between the induction blades and impeller blades and secondary flow on liquid flowing is reduced, and therefore the hydraulic performance and efficiency of the submersible pump can be improved, and the good effects of energy saving and efficiency improving are achieved.

The anti-blocking submersible pump comprises a pump body, the pump body comprises a driving part, a pump cavity part and a liquid inlet part, the pump cavity part is located between the driving part and the liquid inlet part, the pump cavity part is provided with an impeller, the driving part is provided with a driving rod, the liquid inlet part is provided with a liquid inlet cylinder and a cutting cylinder, the liquid inlet cylinder is arranged on the outer wall of the cutting cylinder in a sleeving mode, and the cutting cylinder is provided with an impeller. The cutting cylinder abuts against the inner wall of the liquid inlet cylinder, the cutting cylinder is connected with the driving rod, the liquid inlet cylinder is provided with a liquid inlet hole, the cutting cylinder is provided with a cutting hole, and the cutting hole is used for cutting aquatic plants. The cutting barrel is arranged, when strip-shaped foreign matter such as aquatic plants penetrates through the liquid inlet hole and the cutting hole to enter the liquid inlet part, the hole wall of the cutting hole of the rotating cutting barrel and the hole wall of the liquid inlet hole have the cutting effect similar to shearing through scissors, and therefore the situation that the aquatic plants enter and wind the impeller is reduced, and the situation that the liquid inlet barrel is blocked is reduced; the working stability of the pump body is improved.

The utility model belongs to the technical field of submersible pump motors, and particularly relates to submersible pump motor press-fitting equipment which is used for press-fitting forming of a pump shell, a stator, a rotor and a rear cover and comprises a rack and a rotary table device which is installed on the rack, a plurality of material carrying seats are arranged on the rotary table device, and the rotary table device drives the material carrying seats to be switched to set stations; the material cleaning device is used for cleaning the interior of the pump shell; the material heating device is used for heating the pump shell; the material changing device is used for moving the heated pump shell to the material heating device; the first press-fitting device is mounted on the rack and used for obtaining the heated pump shell and pressing the pump shell and the stator; the material control device is installed on the machine frame, and the material control device turns over the pump shell so that the rotor and the rear cover can be installed; the second press-fitting device is arranged on the rack and used for press-fitting the rotor and the rear cover on the pump shell; and the discharging device is located on the side of the rack, and after the material control device conveys the pump shell assembled with the stator, the rotor and the rear cover out of the station, the discharging device conducts discharging.

The gravel geology pit-in-pit dewatering construction method comprises the following steps that a foundation pit dewatering tube well is excavated and arranged on the side edge of a large foundation pit, and the water level is lowered to the preset elevation; a local ultra-deep position dewatering well with the preset depth is excavated and arranged on the side edge of the pit in the pit, and a dewatering well protection cage formed by binding a reinforcing steel bar structure in a well pipe shape and densely covering a steel wire net is arranged; a submersible pump is put into the precipitation well protection cage, and the submersible pump is started for pit-in-pit precipitation; keeping rainfall, and carrying out formwork construction of a concrete cushion layer in the pit; and after the concrete cushion layer of the pit-in-pit reaches the strength, form removal is conducted, the submersible pump is taken out, the dewatering well at the local ultra-deep position is backfilled, and cushion layer construction of the large foundation pit is conducted. According to the construction method, formwork erecting construction of the concrete cushion layer in the pit is firstly carried out, then the dewatering well at the local ultra-deep position is backfilled, and then cushion layer construction of the large foundation pit is carried out, so that the integrity is guaranteed; by means of the dewatering well protection cage, the dewatering effect is guaranteed, cost is reduced, the dewatering well protection cage is denser after backfilling, and the structural strength is improved.

The present disclosure relates to a wellhead penetrator system comprising a penetrator body comprising a hollowed cylindrical frame connecting a top end to a bottom end; a cable seal located within the penetrator body, comprising: a cylindrical core made of a polymer having three cylinder-shaped port holes configured to each provide a path for of the three insulated electrical wires; a top side, wherein the port holes extend upward from the top side of the cable seal; and a bottom side facing into the cavity located in the bottom end of the penetrator body, wherein the port holes extend downward from the bottom side of the cable seal; and a follower comprising a cylindrical metal body and cylindrical holes, wherein the follower seats against the bottom side of the cable seal so that port holes of the cable seal protrude through the cylindrical holes of the follower.

Continuous gross rate of each of a plurality of wells is estimated. Information provided by sensors configured with each of a plurality of electrical submersible pumps is received. Information associated with a respective model of each of the plurality of electrical submersible pumps is accessed. Utilizing at least one of artificial intelligence and machine learning, the information provided by sensors and the information associated with the respective model of each of the plurality of electrical submersible pumps is processed to estimate a first gross rate of each of the plurality of wells. A second gross rate of each of the plurality of wells is estimated via a pipeline simulation that applies a physics-based model. A continuous gross rate for each of the plurality of wells is estimated as a function the first gross rate and the second gross rate.

The invention belongs to the technical field of water pumps, and particularly relates to a variable-frequency submersible pump water shortage detection method which comprises the following steps: S1, initializing a single chip microcomputer, and setting no-load power PS and a temperature change threshold TS; s2, processing water pump driving and other functional processes; s3, the temperature Ti, the voltage Ui and the current Ii are detected regularly; s4, the operation power Pi of the water pump is calculated according to the formula Pi = UiIi; s5, if the number of times that the water pump operation power Pi is smaller than the no-load power PS exceeds 50% within the continuous preset time, the step S8 is executed; otherwise, executing the step S6; s6, the temperature difference value delta Ti between the current temperature Ti and the previous temperature Ti-1 is calculated; s7, if the temperature difference values delta Ti of continuous preset times are all larger than the temperature change threshold TS, the step S8 is executed; otherwise, executing the step S2; and S8, setting a water shortage mark, stopping driving of the water pump, and returning to the step S2. Damage caused by the fact that the water level only submerges the pump body but the motor and the variable frequency driving plate are exposed in the air can be effectively avoided.

The utility model relates to the technical field of submersible pumps, and discloses a well submersible pump self-adaptive to water depth, which comprises a mounting ring seat and a submersible pump, a locking column is mounted on the outer wall of the mounting ring seat, threads are arranged at the contact position of the locking column and the mounting ring seat, and a rotating handle for rotating is mounted at the outer end of the locking column. According to the well submersible pump capable of self-adapting to the water depth, after the submersible pump is put into a water well, the buoyancy plate floats on the water surface, so that the distance between a water inlet in the bottom end of the submersible pump and the water surface is adjusted, use is convenient, and manual hoisting control over the depth through a rope on the ground is not needed; the buoyancy plate can move up and down along with the water surface, so that a water inlet in the bottom end of the submersible pump keeps the same distance with the water surface all the time, the supporting screw is prevented from getting close to the water surface to suck impurities floating on the water surface, manual water pump position adjustment is not needed, and use is convenient.

The utility model discloses an automatic filtering and cleaning system for bathing wastewater, which comprises a filtering water tank, a filtering net and a wastewater tank, the filtering water tank is divided into a filtering area and a non-filtering area by the filtering net, a liquid level sensor A is arranged in the non-filtering area, the outer side of the non-filtering area is connected with a bathing wastewater conveying pipe and a blow-off pipe, the blow-off pipe is provided with a stop valve D, and the stop valve D is connected with the wastewater tank. A liquid level sensor B, a submersible pump A, a cleaning nozzle A and a cleaning nozzle B are fixed in the filtering area, the cleaning nozzle A is connected with a tap water supply point pipeline, and a stop valve A is mounted on the pipeline; the submersible pump A is in pipeline connection with the waste water tank, a stop valve B is arranged on the pipeline, the cleaning nozzle B is in pipeline connection with the stop valve B, and a stop valve C is arranged on the connecting pipeline; and the liquid level sensor A, the liquid level sensor B, the stop valve A, the stop valve B, the stop valve C and the stop valve D are respectively connected with a central controller of the system.

An electrical submersible pump system includes an electrical submersible pump (ESP) and a motor connector assembly (MCA) coupled to the ESP, such that the MCA includes an upper annular body including an outer circumferential annular surface, a lower annular body coupled to the upper annular body via a threaded connection, and a bearing sleeve assembly that includes a bearing sleeve, such that the bearing sleeve assembly is configured to mount on the outer circumferential annular surface.

The invention belongs to submersible pump machining equipment, and particularly relates to a vacuum adsorption machining clamp and submersible pump head machining equipment and method. In order to solve the problems that in the prior art, due to the fact that small chippings are accumulated in a clamping groove in the machining process, the workpiece inclines during clamping, the following scheme is provided, the device comprises a fixed disc, the top of the fixed disc is rotationally connected with a rotating base disc, and a clamping groove for containing the workpiece is formed in the top of the rotating base disc; in order to tightly adsorb the workpiece in the clamping groove, a vacuum adsorption structure is arranged in the rotating base plate, when air in the annular cavity is exhausted to conduct vacuum adsorption on the workpiece, the pressing plate can be driven to move downwards so that the pressing block can clamp the workpiece in the vertical direction, in addition, the baffles can be controlled to be close to each other to form a circular ring, and therefore the clamping efficiency is improved. And a gap between the workpiece and the clamping groove is shielded.

The utility model discloses a submersible pump lifting device with a linear guide rail and capable of rotating, which comprises the vertically arranged rotatable linear guide rail, a sliding block connected to the linear guide rail in a sliding manner, a water pump fixing seat fixedly arranged on the sliding block, and a cantilever capable of rotating horizontally arranged at the top of the linear guide rail. A pulley is arranged at the top of the cantilever, a winch is arranged in the middle of the cantilever, a steel wire rope is arranged on the pulley, one end of the steel wire rope is used for being connected with a submersible pump, and the other end of the steel wire rope penetrates through the pulley and then is connected with the winch. Free lifting and 360-degree rotation of the submersible pump can be achieved, the position and the angle of the submersible pump can be conveniently adjusted according to the requirements of a user, working efficiency can be obviously improved, the labor intensity of workers can be obviously reduced, and the submersible pump lifting device further has the advantages of being simple in structure, small in occupied area, convenient to install and use, good in safety and the like.

The utility model discloses a water quality monitoring stratified sampling device, relates to the technical field of water quality sampling equipment, and aims to provide a water quality monitoring stratified sampling device which is simple in structure and capable of automatically sampling at a corresponding depth. A water inlet and outlet pipe is arranged on the side face of the submersible pump, the submersible pump is used for supplying water to the ballast tank or discharging water from the ballast tank, a storage battery is arranged in the submersible pump, and a sampling tank is arranged on the submersible pump. When the sampling tank moves to a water layer with the corresponding depth, the water pressure of the current position exceeds the supporting force of the spring, the water pressure extrudes the base plate open and then injects the water into the water storage cavity, after water taking is completed, the base plate is driven by the spring to reset, the purpose of automatically sampling the water quality of the corresponding water depth is achieved, and the achieved structure is very simple and reliable.

The invention belongs to the technical field of ethylene storage and transportation, and particularly discloses a liquid low-temperature ethylene gasification heating and boosting system which comprises a low-temperature ethylene storage tank, an ethylene gasifier, an ethylene superheater and an ethylene buffer tank, an ethylene immersed pump column is arranged in the low-temperature ethylene storage tank, and the upper portion of the ethylene immersed pump column is communicated with an immersed pump ethylene delivery pipeline. An outlet of the immersed pump ethylene delivery pipeline is connected to a tube bundle inlet on the ethylene gasifier, and a tube bundle outlet on the ethylene gasifier is connected to the ethylene superheater through a pipeline. The invention provides a liquid low-temperature ethylene gasification heating and boosting system and method, and an ethylene gasifier provided by the invention uses propane as a medium, cools chilled water after heat exchange of a downstream production device, and recycles the cooling capacity of ethylene at the same time; the ethylene superheater selects steam as a heat source, and the unique structural design is combined, so that the defects that the vaporizer is easy to frost and freeze are overcome.

The invention relates to the technical field of storage and distribution of liquefied gas, and particularly discloses a pre-cooling, filling and waste gas treatment system of an LNG fuel ship, which comprises the following steps: S1, connecting a liquid nitrogen tank car with a gasification pry to pre-cool a fuel cabin of the LNG fuel ship; s11, low-temperature nitrogen / liquid nitrogen of the liquid nitrogen tank car is conveyed to the input pipeline through the gasification pry, and the low-temperature nitrogen / liquid nitrogen is conveyed to the fuel cabin through the input pipeline; s2, the LNG tank car is connected with a gasification pry to generate gasified natural gas to expel nitrogen in a fuel cabin of the LNG fuel ship, and LNG replacement of the fuel cabin is completed; s3, the LNG tank car achieves gas-phase pressurization through a gasification pry, LNG is conveyed to a fuel cabin through an input pipeline, and LNG filling of the fuel cabin is completed; and S4, the LNG tank car achieves gas-phase pressurization through the gasification pry and the filling pry, LNG enters an LNG immersed pump of the filling pry, the LNG is conveyed to the fuel cabin through the LNG immersed pump, and LNG filling of the fuel cabin is completed.

The utility model discloses a galvanized steel sheet passivation device, and belongs to the field of steel sheet passivation, the galvanized steel sheet passivation device comprises a positioning frame, a motor is fixedly assembled on the inner side of the positioning frame, a first chain wheel is fixedly assembled on a power output shaft of the motor, and the outer edge of the first chain wheel is sleeved with a chain; water in an inner cavity of a water tank is discharged to the inner cavity position of a first connecting pipe through a water pipe by driving a submersible pump, a steel plate body is sprayed through a spray head, so that dust on the surface of the steel plate body is washed away, the cleaning effect of the steel plate body is kept, and the steel plate body can be dried through a heating pipe to be in a dry state; and after spraying is finished, the driving motor rotates reversely to move the steel plate body to the position below the heating pipe, then the heating pipe is used for drying the steel plate body sprayed with the passivation solution again, it is guaranteed that the passivation solution can be rapidly dried, and therefore it is guaranteed that the passivation solution is not prone to falling off.

The present invention relates to a low-emission device and method for a liquefied natural gas filling station with a pump, comprising a low-temperature storage tank (10), a submersible pump (20) and a gas dispenser (30), and a BOG recovery skid (40). The BOG recovery skid is provided with a recovery skid liquid inlet (41), a recovery skid liquid outlet (42) and a recovery skid gas inlet (43). The recovery skid liquid inlet (41) is connected to the submersible pump outlet (21), the recovery skid liquid outlet (42) is connected to the gas dispenser liquid phase port (31), the recovery skid gas inlet (43) is connected to the gas phase port (11) of the low-temperature storage tank, the gas return port (12) of the low-temperature storage tank is connected to the gas phase port (32) of the gas dispenser, and the liquid phase port (13) of the low-temperature storage tank is connected to the submersible pump inlet (22). The present invention uses a BOG recovery skid with a BOG recovery function, which can reduce BOG emissions, reduce resource waste, and improve the economic benefits of the gas station. The BOG recovery skid is independently configured and installed, and can be easily connected to existing LNG filling station equipment. There is no need to upgrade or modify the original equipment, and it does not affect the operation and control methods of the original system. It is particularly suitable for small LNG filling stations with small gas volumes.