206 results about "Electromagnetic flow" patented technology

The invention belongs to the technical field of flowmeter verification, and discloses a two-phase flow analysis system and method based on a differential pressure flowmeter and an electromagnetic flowmeter. The method comprises the steps that a differential pressure flow meter and an electromagnetic flow meter are arranged on adjacent sections of a pipeline, the electromagnetic flow meter collects voltage signals and analyzes the voltage signals to obtain liquid phase volume flow, and liquid phase mass flow is obtained by combining temperature correction; the differential pressure flowmeter calculates the gas density by using an ideal gas law according to the temperature and the pressure; inputting multi-sensor time sequence data into the weight optimization model, and optimizing the volume gas content and the total mass flow rate; baseline parameters are calibrated during full-pipe single-phase flow to obtain zero drift, and real-time temperature and pressure dynamic correction are combined, so that the metering precision and the working condition adaptability are improved; the problem of verification deviation of a traditional flowmeter is solved, high precision and high reliability of complex gas-liquid two-phase flow metering are achieved, and efficient and reliable technical support is provided for two-phase flow precise metering and process control in the fields of chemical engineering, energy and the like.

The embodiment of the invention provides a signal processing method and device and electronic equipment. In the embodiment of the invention, when the original voltage information collected by the electromagnetic flow monitoring equipment is obtained, the bias voltage correction is carried out on each piece of original voltage information to eliminate the voltage bias interference, and the peak interference elimination is carried out by identifying the abnormal sampling point with the peak noise. Voltage information under different sampling points is filtered to eliminate noise interference information except voltage information matched with output signal characteristics of the electromagnetic flow monitoring equipment, and on the basis, voltage information corresponding to a target sampling point in a set range and a standard voltage signal are subjected to cross-correlation, so that the output signal characteristics of the electromagnetic flow monitoring equipment are improved. The effective voltage information is extracted to be used for fluid characteristic measurement of the measured object, so that a large amount of noise interference in the collected original voltage information is effectively inhibited, and the accuracy of a measurement result output by the electromagnetic flow monitoring equipment, namely the fluid characteristics, is improved.

The invention discloses a high-overload distribution transformer design method based on geometric dimension reduction and multi-objective optimization, and the method comprises the steps: simplifying the three-dimensional structure of a transformer based on the axial symmetry characteristics of the transformer, building a two-dimensional axial symmetry model, and reserving the key geometric characteristics of an iron core, a winding and transformer oil; based on the two-dimensional axisymmetric model, constructing an electromagnetic-flow-heat multi-physics field coupling simulation model, calculating electromagnetic field distribution, and simulating oil flow and temperature field distribution in the transformer; based on the finite element simulation data and an improved four-vector multi-objective optimization algorithm, establishing a multi-objective optimization model, carrying out collaborative optimization on transformer structure parameters, and outputting a Pareto optimal solution set; and determining an optimal design scheme of the electromagnetic structure of the transformer according to the Pareto optimal solution set. Through the improved four-vector multi-objective optimization algorithm, the local development and global exploration capabilities are comprehensively improved, and the accuracy and diversity of the optimization scheme are improved.

An electromagnetic flow control method for reducing inclusions in a small-size cast billet. During continuous casting of the small-size cast billet, an electromagnetic stirring device having a Z-direction electromagnetic force is provided at a mold (3) and is capable of controlling the flow of molten steel in the mold, and carrying out Z-direction acceleration on a peripheral region of the molten steel while promoting circumferential rotational stirring of the molten steel in the mold. The method can reduce the impingement depth of the molten steel from a submerged entry nozzle in the mold, thereby having positive effects on promoting the flotation of the inclusions and improving the quality of the cast billet.

The application discloses a pipe jacking construction grouting control method and belongs to the technical field of pipe jacking construction. The purpose is to provide accurate control for the grouting technology in pipe jacking construction. According to the density of stratum, the grouting amount is monitored and controlled in real time through flow meter monitoring and electric switch control. Meanwhile, the grouting holes are arranged along the ring direction on different grouting sections in the pipe jacking direction, so that the grouting can penetrate the whole section, and the wrapping of grouting on the whole pipe jacking section is improved. A plurality of uniformly distributed grouting holes are arranged on the pipe wall of the prefabricated pipe section along the ring direction. A one-way valve is arranged at the outer end of the grouting hole, and a joint for connecting a grouting branch pipe is arranged at the inner end of the grouting hole. A total electromagnetic flow meter, a total electromagnetic pressure gauge and a total electromagnetic ball valve are connected to the grouting main pipe. A branch pipe electromagnetic flow meter, a branch pipe electromagnetic pressure gauge and a branch pipe electromagnetic ball valve are respectively connected to each grouting branch pipe. A plurality of vibration exciters and vibration sensors are fixed on the inner wall of the prefabricated pipe section along the ring direction.

In the system, an electromagnetic simulation module establishes a transformer three-dimensional electromagnetic field model based on a finite element method, and calculates magnetic field distribution, winding eddy current loss and iron core hysteresis loss to obtain loss data; the fluid-solid coupling calculation module is connected with the electromagnetic simulation module so as to simulate a transformer oil flowing and heat conduction process based on computational fluid dynamics; the optimization design module is connected with the fluid-solid coupling calculation module so as to perform parametric modeling and optimization on the winding structure, the cooling channel and the cooling fin layout through the hot spot position and temperature distribution based on a multi-target genetic algorithm and an agent model; the state evaluation and heat dissipation adjustment module is connected with the data interaction layer so as to analyze the health state of the transformer based on sensor data and simulation results, predict the hot-spot temperature trend and dynamically adjust operation parameters of the cooling system through a self-adaptive heat dissipation adjustment algorithm.

The utility model is applicable to the technical field of electromagnetic flow meters, and provides an electromagnetic flow meter beneficial to descaling, which comprises a measuring tube and a shell sleeved on the measuring tube, an electromagnetic measuring mechanism used for detecting the internal flow of the measuring tube is arranged on the shell, an accommodating groove is arranged on the inner wall of the measuring tube, and the accommodating groove is communicated with the measuring tube. The two sides of the containing groove extend out of the left side and the right side of the shell respectively, a built-in scraping plate matched with the containing groove is arranged in the containing groove, the built-in scraping plate and the containing groove are arranged to be in an isosceles triangle shape, and a control mechanism used for controlling the built-in scraping plate to slide in the measuring pipe is arranged on the measuring pipe. According to the device, the problem that a measuring circuit is disconnected due to the fact that scale attached to the surface of the electrode is insulated is avoided as much as possible, the measuring precision of the electromagnetic flowmeter during working is guaranteed, and meanwhile when the electromagnetic flowmeter is not used, the built-in scraper is contracted into the containing groove and does not affect flowing of liquid in the measuring pipe; and the fluid flow measurement accuracy of the electromagnetic flowmeter is ensured.

The invention discloses a switch cabinet condensation mechanism analysis method based on a multi-physical coupling field and a fractal theory, and the method comprises the steps: building a three-dimensional simulation model of a switch cabinet based on a solidworks environment; based on electromagnetic-flow-heat-wet coupling field simulation, judging parts easy to damp and condense; establishing a prediction model of condensation distribution in the switch cabinet based on a fractal theory; analyzing the condensation development process of the edge extraction condensation image based on an improved morphological method; the condensation development sequence of insulating parts in the switch cabinet is determined by simulating the diffusion process of wet air in the switch cabinet on the basis of multiple physical fields, the method is simple in principle, the parts, prone to generating condensation, in the switch cabinet can be accurately positioned, and the generation and development process of the condensation can be clearly analyzed and predicted.

The invention discloses an automatic mixing control device for natural rubber latex and acid liquor. The device is provided with a latex pool (1) and an acid liquor pool (2), a latex pipeline (3) is connected below the latex pool (1), an electromagnetic valve (4) is arranged on the latex pipeline (3), and an electromagnetic flowmeter (6) is arranged at the rear part of the electromagnetic valve (4). An acid liquor pipeline (10) is connected below the acid liquor pool (2), an electric control valve (11) is arranged on the acid liquor pipeline (10), and a turbine flowmeter (13) is arranged at the rear end of the electric control valve (11). The tail ends of the latex pipeline (3) and the acid liquor pipeline (10) are provided with a glue-acid mixing pool (16), a glue-acid mixing pipeline (17) is arranged behind the glue-acid mixing pool pipeline (16), and the tail end of the glue-acid mixing pipeline (17) is provided with a PH value measuring probe (19) and a PH value measuring instrument (18). The device has the beneficial effects that the automation of the latex solidification acid preparation process is realized, the labor cost is reduced, the production efficiency is improved, and the stability of the product quality is ensured.

The utility model belongs to the technical field of vending machines, and particularly relates to a hydrogen-rich water vending machine which comprises a cabinet body, a control system, a hydrogen production machine, a water-hydrogen mixing system, a water supply system, a pressure storage tank, an electromagnetic flow valve and an output pipe. The control system is arranged on the outer side of the cabinet body and comprises a control panel; the hydrogen production machine, the water-hydrogen mixing system, the water supply system, the pressure storage tank and the electromagnetic flow valve are arranged in the cabinet body; the water-hydrogen mixing system comprises two input ports and an output port, the water supply system is connected with one input port through a pipeline, the hydrogen production machine is connected with the other input port through a pipeline, the output port is connected with the storage tank through a pipeline, one end of the electromagnetic flow valve is connected with the pressure storage tank, and the other end of the electromagnetic flow valve is connected with the output pipe; the electromagnetic flow valve is opened, and the water in the pressure storage tank is output from the output pipe under the pressure of the water.

The invention discloses an electromagnetic flowmeter flow prediction method based on magnetic sensor identification analysis, and relates to the technical field of electromagnetic flow measurement, and the method comprises the steps: collecting a magnetic field intensity signal in real time, modulating an excitation coil based on a high-frequency pulse to generate an alternating magnetic field, and outputting an original magnetic field signal matrix containing space-time information; the flow velocity field predicted value and the attention weight vector are jointly optimized through a gradient propagation algorithm to minimize the mean square error of the predicted flow velocity and the ultrasonic Doppler reference value, and a calibrated flow value is output; and calculating a real-time confidence score based on the calibrated flow value, and when the score is lower than a preset threshold, performing online fine tuning on the attention weight vector by using an elastic weight consolidation algorithm, and outputting an anti-interference flow prediction result. The differential Maxwell equation constraint is embedded, the flow velocity field and the material parameters are optimized in a combined mode, and dual verification of the measurement result of the electromagnetic flowmeter on the aspects of data precision and physical rules is achieved.

The invention discloses an electromagnetic networking flow measurement system which solves the problems that an existing radar flow meter is prone to being interfered by wind power, an ultrasonic flow meter is complex to install and debug and prone to being influenced by water flow impurities, and a single ultrasonic flow meter is low in precision. The system comprises a radar water level gauge, an electromagnetic flowmeter host, a connecting cable, an electromagnetic flow velocity sensor, a vertical rod and a water storage structure, three electromagnetic flow velocity sensors are arranged in the water storage structure, a connecting cable is electrically connected with the sensors and a host, and a model algorithm is arranged in the host. Multiple electromagnetic sensor networking is combined with an electromagnetic fluid induction technology, a radar water level gauge and a host algorithm are matched, and flow velocity, water level and flow parameters can be accurately collected and output; the sensor is small in fluid-imitating appearance resistance, high in system waterproofness, convenient to disassemble and assemble, small in size and low in cost, a high-precision scheme is provided for flow measurement of medium and large channels, and the flow measurement efficiency and reliability are effectively improved.

The application discloses a kind of by temperature field and airflow field in situ adaptive control component shape laser additive manufacturing system and method thereof.Laser additive manufacturing system includes sealed protective cavity, total control unit, temperature field monitoring-control unit and airflow field monitoring-control unit.Temperature field monitoring-control unit includes infrared thermometer, thermocouple temperature measuring element and induction heating coil;Airflow field monitoring-control unit includes protective gas pipeline, electromagnetic flow regulating valve, oxygen content monitor and vacuum air filter.Total control unit includes temperature field control module and airflow field control module.Total control unit carries out in situ adaptive control to the temperature field of laser additive manufacturing by temperature field control module, improves the distribution of temperature field in the whole process of additive manufacturing, reduces the molten pool temperature gradient in the process of laser additive manufacturing, improves forming defect, and improves material performance.

The invention relates to a portable measuring apparatus (100) for measuring at least one sap flow in a plant, said plant having an external envelope, said apparatus (100) comprising: - a microwave transmitter (10) for emitting a microwave electromagnetic flow towards a first part of the external envelope of said plant so as to heat an internal portion of said plant; - a thermal sensor (20) arranged to capture thermal radiation from said plant over time, - a processing unit (30) configured to determine, from the thermal radiation captured by the thermal sensor, a displacement of the heat front over time in said plant and to estimate, on the basis of the displacement of the heat front, the sap flow Figure for the abstract: Fig. 2

The invention relates to the field of flow metering, in particular to a mine electromagnetic flowmeter which comprises a shell, a lining and an electrode, the lining is arranged in the shell, the electrode is rotatably mounted in the lining, a water storage cavity is formed in the shell, a water spraying opening communicated with the water storage cavity is formed in the lining, the water spraying opening faces the electrode, and the water spraying opening is communicated with the water storage cavity. And the water storage cavity is connected with an energy storage device. The electrode is driven to rotate by flowing water flow in a pipeline, so that multiple sides of the electrode can be flushed by the water flow, energy and water are stored by water pressure, stored energy is released when the water flow stops, and water is drained and stored through the released energy to flush dirt remaining on the electrode, so that the scaling speed of the electrode is slowed down, and the cleaning frequency of the electrode is reduced; the problems that the electrode scaling speed of the mine electromagnetic flowmeter is high, the electrode cleaning period is frequent, electrode abrasion is accelerated, the electrode corrosion rate is increased, and the service life of the mine electromagnetic flowmeter and the electrode measurement accuracy are affected are solved.

The invention relates to sodium silicate production filtering equipment and a method thereof, and belongs to the technical field of filter press equipment and control methods thereof, the sodium silicate production filtering equipment comprises a main body frame, the main body frame comprises two parallel bearing steel beams, and two ends of the bearing steel beams are respectively connected with a head baffle and a tail baffle; the filter plate group is arranged between the two bearing steel beams and can slide along the bearing steel beams; the hydraulic pressing part is mounted on the tail baffle and is used for pushing a pressing plate to apply pressure to the filter plate group; the feeding pipeline is connected to the feeding port of the head baffle, and a feeding pump, an electromagnetic flowmeter and an inlet pressure sensor are sequentially arranged on the feeding pipeline; the pump power monitoring unit is installed on a power supply cable of the feeding pump and used for collecting the working current of a motor, and invalid intervention operation is avoided through an accurate decision-making mechanism.

A flow control valve for assembly with an actuator (22). The flow control valve includes a valve body (30) having one or more inlets (42, 44) to receive pressure and a passageway (46) having a length that spans between a first opening (50) and a second opening (52). A sealing member (32) assembled with the passageway and includes an outlet (74) to receive pressure. The sealing member includes a plunger opening for a plunger that assembles with a movable component (80) of the actuator such that the plunger is movable between an open position and a closed position. A biasing member (36) assembled with the sealing member and the movable component of the actuator. In the closed position the biasing member biases the plunger against the sealing member and pressure through the one or more inlets pushes against the movable component to further move the plunger against the sealing member to seal the plunger opening in the closed position.

The utility model relates to the technical field of electromagnetic flow meters, and discloses an assembly type electromagnetic flow meter which comprises an electromagnetic flow meter body, pipelines are installed at the two ends of the electromagnetic flow meter body, connecting assemblies are arranged at the joints of the electromagnetic flow meter body and the pipelines, and each connecting assembly comprises a first connecting ring connected to the surface of the corresponding pipeline in a sealed and rotating mode. Second connecting rings are fixedly connected to the two ends of the electromagnetic flowmeter, clamping blocks are fixedly connected to the surfaces of the ends, close to the electromagnetic flowmeter, of the first connecting rings, clamping grooves are formed in the surfaces of the second connecting rings, limiting grooves are formed in the second connecting rings, and limiting plates are arranged in the second connecting rings. According to the electromagnetic flowmeter, flange connection is replaced through the arrangement of the connecting assembly, the situation that a large number of screws need to be screwed is avoided, the electromagnetic flowmeter and the pipeline can be rapidly connected, and when the electromagnetic flowmeter needs to be disassembled, the electromagnetic flowmeter can also be rapidly disassembled.

This invention discloses a top-sealed water flow rate testing device for a water-cooled magnet coil, comprising a container assembly and a water-blocking assembly. The water-blocking assembly, used to block the coil under test, is disposed inside the container assembly, dividing the interior of the container assembly into a high-pressure water zone and a low-pressure water zone. The container assembly is provided with an inlet and an outlet, the inlet communicating with the high-pressure water zone and the outlet communicating with the low-pressure water zone. The water-blocking assembly includes a sealing cap and a sealing ring. The sealing cap is disposed on top of the central through-hole of the coil under test, and the outer side of the sealing ring is sealed to the inner wall of the container assembly, while the inner side is sealed to the coil under test. The advantage of this invention is that, through the setting of the water-blocking assembly, the inlet is connected to an external cooling water supply system. The flow rate entering the high-pressure water zone from the inlet can be measured by measuring the water flow rate entering the inlet using an electromagnetic flow meter, thereby realizing the testing of the water flow rate of a single coil under test.

The utility model relates to a novel material lining structure of an electromagnetic flow instrument, and belongs to the technical field of novel material lining structures of electromagnetic flow instruments. Comprising an electromagnetic meter main body, a meter head fixed on the top surface of the electromagnetic meter main body, a lining pipe fixed on the inner wall of the electromagnetic meter main body, a protective layer fixed on the inner circumferential wall of the lining pipe, and a supporting mechanism arranged in the lining pipe, the supporting mechanism comprises an annular bin slidably connected to the interior of the lining pipe, a plurality of supporting plates arranged on the peripheral wall of the annular bin, and guide rods fixed to the sides, facing the annular bin, of the supporting plates and slidably connected with the annular bin. The connecting plates are fixed to the sides, away from the supporting plates, of the guide rods; and the driving assembly is arranged in the annular bin and used for controlling the multiple supporting plates to move. According to the novel material lining structure of the electromagnetic flow meter, the protective layer has better residual chlorine resistance, and meanwhile, the inner wall of the protective layer is smooth, so that the scaling problem caused by long-term use can be prevented.

The utility model relates to the technical field of electromagnetic flow velocity sensors, and discloses a high-precision multi-electrode insertion electromagnetic flow velocity sensor, which comprises a pipeline, the top of the pipeline is fixedly connected with a mounting seat, the upper surface of the mounting seat is attached with a connecting flange, a mounting hole is arranged in the mounting seat, and the connecting flange is connected with the mounting hole. A fixing bolt is arranged in the connecting flange, the outer wall of the fixing bolt is in threaded connection with the interior of the mounting seat, a fixing ring is fixedly connected to the outer wall of the connecting flange, the outer wall of the fixing ring is attached to the outer wall of the pipeline, and a hinge is fixedly connected to one end of the fixing ring. According to the plug-in type electromagnetic flow velocity sensor, the problem that measurement data is unstable or inaccurate due to the fact that a traditional plug-in type electromagnetic flow velocity sensor is difficult to install and fix accurately and stably is solved, stable and accurate installation is achieved, the sensor is kept stable in long-term use, the flow velocity can be accurately measured, and high-precision data can be provided.

The invention relates to the technical field of geological disaster measurement, in particular to measurement marking equipment for geological disaster survey operation, which comprises an outer box, a drilling mechanism is arranged on the right side of the outer box, and the drilling mechanism comprises a drill rod, a base plate and a first hydraulic cylinder; a storage rack is further arranged in the movable cavity and can move back and forth in a reciprocating mode. The inclinometer pipe is further provided with a plurality of detection holes distributed from top to bottom, and sensors of different types can be movably connected into the detection holes so as to complete monitoring operation of different environmental parameters. A liquid storage cavity is further formed in the outer box and located on the left side of the second hydraulic cylinder, a liquid pump is arranged in the liquid storage cavity, the bottom end of the liquid storage cavity is further connected with a grouting pipe through a liquid conveying pipe, one end of the liquid conveying pipe is connected with the liquid pump, and an electromagnetic flow control valve is further arranged on the grouting pipe. According to the invention, the accuracy and the installation stability of the measurement marking operation of the inclinometer pipe are improved, and meanwhile, the upgrading conversion from the traditional physical measurement marking to the intelligent-integrated-multi-source fusion measurement environment information acquisition station of the geological disaster investigation operation is also realized.

1. Name of the product in this design: Converter (integrated right angle). 2. Application of this design: This design is used for electromagnetic flow meters. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention provides a dynamic cooling structure and a dynamic cooling method of a triazole continuous crystallizer, and relates to the technical field of triazole crystallization, the dynamic cooling structure comprises a cooling jacket, the cooling jacket comprises an inner attaching layer, a middle cooling liquid cavity and an outer heat preservation layer, the middle cooling liquid cavity is provided with a spiral plate, and the inner attaching layer is in contact with the crystallizer; a plurality of first thermometers are axially arranged in the crystallizer, the middle-layer cooling liquid cavity is connected with a water inlet pipe and a water outlet pipe in a penetrating mode, an electromagnetic flow valve is arranged on the water inlet pipe, a controller is arranged on the crystallizer, and the controller is electrically connected with the first thermometers and the electromagnetic flow valve. The inner attaching layer is tightly attached to the crystallizer, so that the heat conduction path is shortened; a spiral plate in the middle-layer cooling liquid cavity can guide cooling water to form ordered turbulent flow, so that the temperature dead angle of a traditional cooling cavity is reduced, and the heat exchange area and the heat exchange efficiency are greatly increased; the temperature field in the crystallizer is uniformly distributed, and the overall service life of the crystallizer is prolonged.

The invention discloses a device and a method for synchronously testing high-temperature stability and drainage performance of a porous asphalt pavement. The device is mainly composed of a load simulation system, a drainage system and a temperature control system. The load simulation system applies controllable intermittent repeated load to the test piece through a pressurizing mechanism and a load sensor, and a dynamic creep test is carried out to evaluate the high-temperature stability of the pavement. The drainage system comprises a vertical spray head which is annularly arranged, two water seepage pipes, an annular semi-closed glass wall, an electromagnetic flow sensor and a high-precision scale drainage collection container, and is used for carrying out a variable water head water seepage test through simultaneous load simulation, and evaluating the drainage performance by detecting the seepage flow of a test piece within a set time. The temperature control system is used for accurately controlling the test environment temperature. According to the invention, synchronous testing of high-temperature stability and drainage performance is realized, testing time and labor cost are significantly reduced, interaction of two performances under actual working conditions is simulated, and the testing result has higher engineering guidance value.

The utility model provides an electromagnetic flowmeter convenient to operate. The electromagnetic flow meter convenient to operate comprises an electromagnetic flow meter body; the two flange plates are fixedly connected to the two ends of the electromagnetic flowmeter respectively, mounting holes are formed in one ends of the two flange plates, a first bayonet is formed in one end of one flange plate, a limiting ring is mounted in the first bayonet, a first conical filter cone is fixedly connected to one end of the limiting ring, and a second conical filter cone is fixedly connected to the other end of the limiting ring. The tip end of the first conical filter cone is fixedly connected with a blow-off pipe, the other end of the blow-off pipe is fixedly connected with a sewage storage pipe, and the other end of the sewage storage pipe is fixedly connected with an external threaded pipe. According to the electromagnetic flowmeter convenient to operate, impurities are prevented from being in direct contact with the inner wall of the electromagnetic flowmeter through the design, the impurity attachment period is shortened, meanwhile, the filtered impurities are convenient for workers to clean, and the operation difficulty in the impurity cleaning process of the electromagnetic flowmeter is reduced.

The invention discloses a watering cart spraying flow control method with the optimal moisture content of earth and stone as the target. The method comprises the steps that initial parameters of filling earth and stone are determined; the water spraying device is connected with water spraying vehicle equipment, the water spraying vehicle equipment comprises a water spraying vehicle and a strip-type spray head which is communicated with a water outlet of the water spraying vehicle and used for continuous strip-type water spraying, and an electromagnetic flow valve is arranged on a pipeline between the water outlet of the water spraying vehicle and the strip-type spray head. And constructing a water sprinkling quantity-vehicle speed-water content coupling model, and optimizing the sprinkling flow according to the initial parameters, the paving indexes, the driving speed of the sprinkling vehicle and the effective sprinkling width. According to the invention, by establishing the quantitative coupling relation model among the sprinkling amount, the vehicle speed and the water content and comprehensively considering the initial water content, the optimal water content, the paving thickness, the sprinkling parameters and other factors of the soil and stone materials, automatic calculation and optimization of the sprinkling flow of the sprinkling vehicle are realized, the randomness of judgment depending on manual experience in the past is avoided, and the accuracy and the reliability of the sprinkling flow are improved. And the watering operation is converted from experience driving to data driving.

The present application relates to the technical field of smelting furnace, and provides a melting and preserving integrated furnace for non-ferrous metal recycling, which is characterized by comprising a furnace body, an electromagnetic rolling stirring device and an electromagnetic propeller, the furnace body has a feeding cavity, a cold chamber and a hot chamber which are sequentially communicated, a spoiler wall is arranged between the feeding cavity and the cold chamber, the lower part of the spoiler wall is provided with a liquid passage, the electromagnetic rolling stirring device is arranged at the lower part outside the feeding cavity, the electromagnetic rolling stirring device is configured to drive part of the molten liquid in the feeding cavity to enter the cold chamber through the liquid passage, and drive part of the molten liquid in the feeding cavity to impact the spoiler wall and roll downward, so as to stir the raw materials by means of the solution, and the electromagnetic propeller is arranged on the outer bottom wall of the furnace body. The melting and preserving integrated furnace provided by the present application realizes the circulation of the molten liquid in the furnace cavity of the smelting furnace through the cooperation of the electromagnetic rolling stirring device and the electromagnetic propeller, and solves the technical problem that the existing technology adopts the graphite rotor to circulate the cold and hot molten liquid, which is easy to mix impurities.

The invention discloses a control method of a forklift for lowering a yacht. The forklift comprises a forklift body, an executing mechanism with a plurality of lifting oil cylinders, a fork arm and an oil outlet channel. The executing mechanism drives the fork arm to move up and down through the lifting oil cylinders. The lifting oil cylinder discharges oil to the oil outlet channel, so that the fork arm moves downwards; speed limiting valves and electromagnetic flow meters are arranged at the respective connecting ends of the lifting oil cylinders and the oil outlet channel; the electromagnetic flowmeter monitors the flow of the speed limiting valve in real time; the speed limiting valves are arranged in parallel and are uniformly controlled by a control unit; and by arranging the speed limiting valve, the oil discharging flow is effectively limited, the situation that an oil outlet channel is damaged and impacts the yacht is avoided, and the operation safety is remarkably improved.

The utility model relates to the field of electromagnetic flow meters, and provides a modular electromagnetic flow meter connecting device which comprises a first unit module and a second unit module, and the first unit module is connected with a circuit board in an inserted mode; the second unit module is connected with the first unit module in an inserted mode, and a lead is fixed to the second unit module. The utility model has the effect of improving the convenience of operations such as connection, disconnection and exchange of the lead and the unit module.