103results about How to "Reduce traffic" patented technology

This invention provides a coolant flow channel plate, relating to the technical field of vehicle thermal management. It includes a cover plate fixed to the top of a main board, with the main board and cover plate welded together at their side edges to form an internal flow channel cavity. The cover plate has refrigeration unit inlet / outlet assemblies on its surface. The main board has, from left to right, a heater pump mounting port, a battery pump mounting port, and a motor pump mounting port. The circuits between the heater pump and battery pump mounting ports, and between the heater pump and motor pump mounting ports, within the internal flow channel cavity are each equipped with a first anti-heat-spreading section. The circuit between the motor pump and battery pump mounting ports forms a variable-diameter section, with a second anti-heat-spreading section at its front end. A guide section is provided on the circuit of the battery pump mounting port. This invention solves the problem of lacking anti-heat-spreading structures at the connection points of circuits in different temperature ranges, achieving the technical effects of reducing vehicle weight, reducing vehicle connection piping, reducing heat loss in the thermal management system, and improving thermal management efficiency.

The application provides a target positioning method based on multi-station long-time passive angle measurement, which is applied to an information collection node and comprises the following steps: obtaining angle information of a target collected by a passive sensor in a preset time period, and a sampling position and a sampling time of the passive sensor; estimating a first sampling position and a first motion speed corresponding to the passive sensor at a first time according to the sampling position and the sampling time of the passive sensor; estimating first angle information of the target corresponding to the passive sensor at the first time according to the angle information of the target collected by the passive sensor and the sampling time; and sending the first sampling position, the first motion speed and the first angle information corresponding to the passive sensor to an information fusion center, so that the information fusion center estimates the position and the speed of the target at the first time according to the first sampling position, the first motion speed and the first angle information corresponding to the passive sensor, and the communication amount can be reduced and the positioning precision can be improved.

The application relates to a water conservancy ditch sludge treatment device and a treatment method thereof, which comprises a sludge collecting mechanism for collecting and flocculating sludge, a mechanical extrusion mechanism for extruding flocculated sludge water and forming a mud cake to discharge free water in the sludge, and an electro-osmotic water filtering mechanism for continuously filtering water in the ice by the electro-osmotic mode to discharge bound water in the mud cake. The mechanical extrusion mechanism comprises a filter chamber for extruding water after collecting flocculated sludge water, a collecting assembly for collecting water at the bottom of the filter chamber, and a judging assembly for monitoring the flow rate of the mechanical extrusion water. If the flow rate is lower than a preset threshold value, it is determined that mechanical dewatering reaches the limit, the mechanical filter chamber bottom water outlet is closed, and the electro-osmotic water filtering mechanism is opened. The mechanical extrusion and the electro-osmotic mode are matched with each other, the effect of fully discharging sludge water is realized, and the efficiency of sludge recycling is improved.

The utility model relates to the technical field of pulp processing, and discloses a filtering device for grapefruit pulp processing, which comprises a feed inlet, the bottom of the feed inlet is communicated with a second hollow shell, the right side of the outer wall of the second hollow shell is fixedly connected with a waterproof shell, and the inner wall of the waterproof shell is fixedly connected with a motor. A rotating rod is fixedly connected to the output end of the motor, oval blocks are fixedly connected to the left side and the right side of the outer wall of the rotating rod, a filter screen is slidably connected to the middle of the inner wall of the second hollow shell, a filter plate is fixedly connected to the bottom of the inner wall of the second hollow shell, and a plurality of filter holes are formed in the top of the filter plate. The bottom of the second hollow shell communicates with a discharging opening. The motor is started to enable the rotating rod and the oval block to rotate, the filter screen vibrates, large-particle matter is filtered to the top, raw materials are further filtered through the filter holes and finally fall into the first hollow shell through the discharging opening, vibration filtering is achieved, and pulp is prevented from blocking the filter screen.

This utility model discloses a gas pressure regulating structure, relating to the field of gas pressure regulation technology. The utility model includes a regulating mechanism for controlling the gas intake volume and flow rate. The regulating mechanism includes a cylinder and a worm gear housing. The cylinder is hollow inside, and a housing is fitted onto its outer wall. Square boxes are installed at the center of both the front and back of the housing. This utility model uses an installation assembly: pressing a button downwards causes a cam at its bottom to rotate. When the cam rotates, it causes a hook to deflect, pulling the hook out of the rectangular hole of the insert rod. Then, moving the square cover upwards pulls out the insert rod. This allows for control of the rotation of the cam and hook via a button. When the lock is released, pulling the square cover upwards removes the cylinder. The disassembly process is relatively simple, ensuring efficient maintenance of the pressure regulator.

The application provides a kind of high molecular denitration system ammonia escape control equipment and control method, it is related to the technical field of removing nitrogen oxides in flue gas.The method applies the equipment, the equipment includes: denitration reactor, with the flue gas inlet pipe and the flue gas outlet pipe, the flue gas inlet pipe and the flue gas outlet pipe are sequentially provided with spray grid and reaction zone;Agent pipeline is connected with the spray grid;Adjusting mechanism;Ammonia escape detection mechanism is used to detect the ammonia escape in the flue gas outlet pipe;Control mechanism is used to control the adjusting mechanism according to the detection result of the ammonia escape detection mechanism, to adjust the flow size in the agent pipeline.When ammonia escape detection mechanism detects that the ammonia content in the flue gas outlet pipe is higher than the preset threshold, the flow in the agent pipeline is reduced by controlling the adjusting mechanism through the control mechanism, the ammonia escape is reduced, and the blockage and corrosion of the denitration reactor and downstream equipment caused by the generation of ammonium bisulfate due to water vapor, SO3 and ammonia escape in flue gas are avoided.

The invention provides a centrifugal collecting device. The centrifugal collecting device comprises a driving part and a driving part, the rotor assembly is connected with the driving piece; the liquid storage part is arranged on the rotor assembly, and the liquid storage part is provided with a liquid storage cavity; the flow guide assembly comprises a flexible flow guide pipe, and one end of the flexible flow guide pipe is connected with the liquid storage part and communicates with the liquid storage cavity; the flow adjusting part is connected with the rotor assembly, a slit is formed in the flow adjusting part, and under the condition that the flexible flow guide pipe is embedded into the slit, the flexible flow guide pipe deforms; the collection assembly comprises a treatment container, a filter part and a collection container, the filter part is arranged in the treatment container and divides the treatment container into a treatment chamber and a confluence chamber, the treatment chamber is communicated with the other end of the flexible flow guide pipe, and the confluence chamber is communicated with the collection container, that is, the effective stripping of the adsorbed secretions is realized; the dosage of a buffer solution is remarkably reduced, and the concentration of effective components in a collected solution is greatly improved, so that a detection result is closer to the content of real secretions in soil.

The invention relates to the technical field of power station gate valves, in particular to a supercritical power station gate valve capable of resisting high-speed steam impact and strengthening protection, which comprises a valve body and a pressure-resistant protection device arranged in an inner cavity of the valve body, an air inlet pipe and an air outlet pipe are arranged on the two sides of the valve body respectively, a mounting seat is arranged at the top end of the valve body, a valve rod is slidably arranged on the mounting seat, and a valve clack is connected to the bottom of the valve rod. A linear driving assembly used for controlling the valve rod to ascend and descend is further arranged on the installation base. The pressure-resistant protection device comprises a valve cage, the valve cage is arranged in an inner cavity of the valve body, at least three throttling holes are formed in the valve cage, the multiple throttling holes are distributed in an annular array mode along the axis of the valve cage, a spiral resistance wing plate is arranged on the outer wall of the valve cage, and the valve clack is located in the valve cage. The function of improving the impact resistance of the supercritical power station gate valve is achieved, and the problem that a gate body cannot accurately control the medium flow due to the fact that a traditional supercritical power station gate valve hinders medium flow at the front section of the gate is solved.

This application discloses a federated learning method, apparatus, device, and storage medium, relating to the field of privacy computing technology. Applied to a federated system composed of multiple participants, the method includes: acquiring the local model parameters of each participant in the federated system; iterating Round training through a local base network and an autoencoder's encoding / decoding layer, and determining the loss value corresponding to the completion of multiple epochs in each Round training process using a preset loss function; sending the local model parameters and loss values ​​to a secure aggregation server, receiving the global parameters and convergence status returned by the secure aggregation server, updating the local model parameters according to the global parameters, and stopping Round training when the convergence status meets preset conditions. The technical solution of this application can improve the learning effect of federated learning in scenarios where the participant data is not independent and identically distributed, and also improve training speed.

The utility model belongs to the technical field of nitrogen purging devices, and particularly relates to a heatable nitrogen purging device which comprises a purging instrument main body, a control panel is fixedly mounted on one side of the purging instrument main body, gas delivery pipes are uniformly arranged at the top end of the purging instrument main body, the bottom ends of the gas delivery pipes are connected with moving pipes, and the moving pipes are connected with the control panel. The purging instrument comprises a purging instrument main body, the purging instrument main body is provided with a plurality of movable pipes, the inner walls of the movable pipes are provided with mitigation assemblies, the outer walls of the movable pipes are provided with lifting assemblies, the bottom ends of the movable pipes are fixedly provided with gas needles, and one side of the purging instrument main body is provided with a water bath mechanism. The flow limiting plates are mutually folded and abutted to form a narrow-mouth cylinder, so that the flow in the moving pipe is reduced, the stability and the reliability of purging work are improved, the purity of a sample is ensured, and the purging effect of the sample is improved.

The application relates to a liquid sheet injection system and method for X-ray free electron laser experiments, which comprises a pneumatic nozzle device, a flow control device, a signal acquisition device and a vacuum device; the pneumatic nozzle device and the signal acquisition device are respectively arranged in the vacuum device, the pneumatic nozzle device comprises a tube assembly, a gas capillary and a liquid capillary are respectively arranged in the tube assembly, and the gas capillary and the liquid capillary are connected with the flow control device; the end of the liquid capillary comprises two symmetrically arranged flow guide inclined surfaces, two symmetrically arranged abutting inclined surfaces and a bottom surface, the flow guide inclined surfaces and the abutting inclined surfaces are alternately distributed around the bottom surface, and a first outlet is arranged on the bottom surface; a gas micro-flow channel is formed between the end inner wall of the tube assembly and the flow guide inclined surface, and a second outlet is arranged at the end of the tube assembly. The application utilizes the compression and shearing effect of high-speed gas on liquid to generate a free-flowing liquid sheet with a sub-micron thickness under vacuum.

This invention discloses a device for inspecting bulge defects in cover glass, belonging to the field of cover glass defect detection technology. The technical solution includes a water tank with an inlet pipe, a glass fixing platform below the water outlet, and the glass being fixed at an angle on the glass fixing platform. A weighing platform is located below the glass fixing platform, and several electronic scales are spaced apart along the length of the glass fixing platform. This invention, by employing the principle of blocking water flow due to bulge defects in the cover glass, can accurately and effectively detect the location and defect level of the bulge defects.

The present application relates to the field of centrifugal pump, concretely is a kind of horizontal self-priming centrifugal pump, including bracing plate, the bracing plate is used to support the support treatment of overall equipment;Water suction mechanism, the water suction mechanism is used to overflow when entering water, handle part water flow;Pressure relief mechanism, the pressure relief mechanism is used to when water pressure in pump is too large, the water flow treatment of discharge;Centrifugal mechanism, the centrifugal mechanism is used to produce rotation to water flow, and make water flow produce centrifugal force and flow out outward;The top of the bracing plate is fixedly connected with pump shell, the top of the pump shell is fixedly connected with water outlet pipe, the horizontal self-priming centrifugal pump, by the movement of half-open impeller towards the inside of water seal component, so that the blade on half-open impeller will be more and more close to the vertical plane where regulation block is located, thus with the rotation of half-open impeller, part centrifugal water flow will impact on regulation block, thereby play the role of reducing the flow and flow rate of water flow from water outlet pipe.

The utility model discloses an urban road lighting system which comprises a plurality of lamp subsystems, namely an Internet of Things lamp subsystem, an energy storage lamp subsystem and a photovoltaic lamp subsystem. Each communication unit is in signal connection with the corresponding lamp subsystem, the service management cloud platform is in signal connection with the communication units, and the service management cloud platform is configured to issue instruction signals to the corresponding lamp subsystems through the communication units. And receiving the internal information and / or environment information of the plurality of lamp subsystems through the communication unit so as to realize unified management of various and large-scale lamp subsystems. Through the synergistic effect of the communication unit and the business management cloud platform, unified management of various types of lamps is realized, and the business management cloud platform can receive internal information and environment information of each lamp subsystem through the communication unit, and issues instruction signals to each lamp subsystem, so that the lamp subsystems are controlled to be in a unified manner. Therefore, centralized control and monitoring of large-scale lamps are realized.

The present application relates to the technical field of artificial intelligence and federated machine learning, and particularly relates to an asynchronous federated learning aggregation method and system based on clustering cache. The present application clusters clients by intermediate features of the clients. In global aggregation, intra-cluster aggregation is firstly performed, and then global aggregation is performed based on client clusters. The client clusters are dynamically updated. In intra-cluster aggregation, an active set and a slow set are introduced to realize an asynchronous participation mechanism of intra-cluster aggregation. Weighted aggregation of the active set and the slow set solves the problem of system heterogeneity. The present application solves the defect of insufficient timeliness of existing federated learning methods in a data heterogeneous scene, and guarantees the timeliness and model training accuracy of federated learning in the data heterogeneous scene.

This invention provides a high-heat-dissipation battery component for new energy vehicles, belonging to the field of new energy vehicle heat dissipation battery technology. It includes a protective shell, inside which a cooling module is installed. The cooling module is used to cool the entire battery module. The battery module consists of a mounting box and battery cells. The battery cells are installed in mounting slots within the mounting box. A top plate is installed on the top of the battery module. The cooling module is connected to a serpentine cooling pipe, which has several adjusting components. Several adjusting components are arranged between adjacent sections of the serpentine cooling pipe. This invention, through the corresponding combination design of the cooling module, the serpentine cooling pipe and adjusting components, and the serpentine cooling pipe and adjusting components, achieves dual heat dissipation functions: overall cooling of the battery module and precise heat dissipation of individual battery cells, thus improving maintenance convenience.

The application discloses a kind of bag type dust collector pulse injection control device and method, belong to bag type dust collector technical field, including box, dust collector bag is installed in the box, the lower part of the box is provided with solenoid valve group, the lower part of the solenoid valve group is provided with pulse injection control box, and the side of the pulse injection control box is provided with electrical terminal tapping box;The output point of the pulse injection control box is connected with solenoid valve group, multiple output points are provided in pulse injection control box, and the solenoid valve group includes multiple solenoid valves, and every two solenoid valves are connected with an output point;Expansion module is arranged on the line connected between solenoid valve group and pulse injection control box, expansion module is connected with intermediate relay, one end of solenoid valve is connected with one end of intermediate relay, and multiple intermediate relays are arranged, and one intermediate relay is connected with multiple solenoid valves.Can effectively reduce the pressure fluctuation amplitude generated by dust collector pulse injection, reduce the consumption of compressed air, reduce the empty head of cigarette and waste cigarette rate.

This application discloses a network connection method, apparatus, electronic device, and readable storage medium, belonging to the field of communication technology. The method includes: establishing a first packet data network (PDN) connection through a first mobile communication network; sending registration request information to a second mobile communication network when the data network of the electronic device is in a closed state; and disconnecting the first PDN connection when the first PDN connection is transferred from the first mobile communication network to the second mobile communication network.

The utility model relates to valve structure technical field especially relates to a control valve, it includes: end cover, main valve block and main valve core etc. Main valve block is fixed on the end cover, forms the hollow channel in the inside of end cover and main valve block, and has the import and export, main valve core is slidably arranged in the hollow channel, and main valve core is hollow structure, and forms and has the multiple sets of throttling portion communicated to the hollow structure inside, and the annular gap is formed between the outer wall of throttling portion and the inner wall of main valve block. The utility model discloses through the multiple sets of throttling portion set up on main valve core, reduces the flow and pressure of fluid, through the annular gap formed between the outer wall of throttling portion and the inner wall of main valve block, avoids high pressure emulsion direct impact main valve core, can store emulsion through the annular gap, thereby further reduced pressure and flow impact, through the combined use of throttling portion and annular gap, can disperse pressure and flow impact, thereby improves the stability and reliability of equipment.

This invention discloses a playlist playback method, apparatus, device, medium, and product. The method includes: when a song-switching event is detected, obtaining the position information of the target song in the player list and the number of songs contained in the player list; loading second target page song data corresponding to a first target song page number based on the position information and the number of songs, and adding the second target page song data to the player list for playback. Through the technical solution of this invention, when playing a large playlist and switching songs, it is possible to determine whether to add new song data to the player based on the position of the currently playing song in the player list and the number of songs in the player list, instead of inserting all songs in the playlist into the player at the start of playback. This reduces data usage and system resource consumption, and improves the user experience.

This invention discloses a triple eccentric butterfly valve with a compensated double-seal function, belonging to the field of butterfly valve technology. It includes a valve body, valve shaft, valve core assembly, compensation assembly, flange tube, and control unit. The valve shaft and valve body are rotatably connected. There are two sets of flange tubes, each securely connected to one side of the valve body. The valve core assembly is located inside the valve body and is securely connected to the valve shaft. The compensation assembly is also securely connected to the valve core assembly. The control unit is securely connected to the upper end of the valve body. Multiple grooves are evenly distributed on the surface of the valve body. This invention compensates for the primary sealing effect by utilizing the change in water flow impact force during the butterfly plate closing process. This compensation reduces friction between the sealing ring and the butterfly plate during closing, and after the butterfly plate closes, the water pressure increases the compressive force between the butterfly plate and the sealing ring, greatly improving the sealing effect.

The invention discloses an event-triggered unmanned ship preset time collision avoidance cooperative path tracking control method. The method comprises the following steps: S1, establishing kinematics and dynamics models of an underactuated unmanned ship; s2, reconstructing the model through coordinate transformation so as to design a controller; s3, constructing a communication topological structure of the multiple unmanned ships and a Laplacian matrix of the communication topological structure according to task requirements; s4, designing an actual preset time cooperative guidance law with obstacle collision avoidance capability, and realizing coordinated navigation among multiple boats; s5, constructing a lumped disturbance observer to estimate the uncertainty of the system, the external disturbance and the derivative of the guidance law; and step S6, designing an actual preset time sliding mode controller based on the observation value in the step S5, and realizing path tracking control of the under-actuated unmanned ship. And S7, realizing collision avoidance cooperative path tracking control of the under-actuated unmanned ship by using the controller based on the step S6.

The utility model belongs to the technical field of feed production, and particularly relates to a feed drying device capable of continuously drying, which comprises a drying box body, a feed port and an exhaust port are arranged at the top of the drying box body, a feed channel is arranged between the feed port and the drying box body, a first flow limiting device is arranged in the feed channel, and a second flow limiting device is arranged in the drying box body. The first flow limiting device comprises a flow limiting rotating shaft and a plurality of material distributing baffles, and the multiple material distributing baffles are evenly distributed on the outer circumference of the flow limiting rotating shaft. A plurality of guide plates are arranged in the drying box body, an air heater is arranged on the side wall of the drying box body, an air outlet of the air heater is communicated with the interior of the drying box body, and a heating disc is arranged at the bottom of the drying box body. The device can realize continuous drying of the feed so as to improve the drying efficiency.

The invention discloses an argon recovery, dust removal and filtration treatment device for the welding industry, and relates to the technical field of argon recovery, the argon recovery, dust removal and filtration treatment device comprises a filtration protection mechanism and a recovery filter cartridge mounted on one side of the filtration protection mechanism, and an adjusting recovery mechanism is arranged on one side of the filtration protection mechanism; the filtering protection mechanism comprises a protection pipeline, first connecting pipes are fixedly installed at the two ends of the protection pipeline, a turning plate rotating shaft is rotationally connected into the protection pipeline, a pipeline turning plate is fixedly installed on the outer side of the turning plate rotating shaft, and a second connecting flange is fixedly installed at the end of the pipeline turning plate. Under the elastic force action of a hydraulic damping telescopic rod and a connecting spring, slow rotation of a turning plate rotating shaft and a pipeline turning plate is further achieved, and the phenomenon that the service life of a filter screen cylinder is affected due to the fact that the filter screen is impacted due to sudden increase of the internal pressure of the pipeline, and the phenomenon that the filter screen cylinder is broken or folded and collapsed is avoided.

The invention provides an adjusting device, method, system and equipment for adjusting states of three red lines of an engine, and relates to the field of airworthiness verification tests of the engine, the adjusting device comprises a swirler, the swirler is arranged in an air inlet channel of the engine, and the swirler is arranged perpendicular to the axis of the engine. The swirler comprises a swirl guide vane which can rotate in the radial direction of the engine, so that the pre-swirl angle of the swirler is adjustable. According to the invention, the thrust of the engine is effectively reduced by controlling the rotation of the rotational flow guide vane, adjusting the pre-rotation angle of the swirler and reducing the flow of the outer culvert airflow of the engine, so that the engine is prevented from generating excessive thrust, and the thrust of the engine does not exceed the red line state too much when the rotating speed of the rotor reaches the red line state; the strength and the service life of key components such as an engine fan, a gas compressor and a turbine are ensured.

The application relates to the technical field of batteries, in particular to an oil-immersed liquid-cooled battery module and a thermal management method. The oil-immersed liquid-cooled battery module comprises a shell, a battery assembly arranged in the shell, a busbar assembly and a first throttling assembly. The battery assembly comprises at least one battery monomer. The positive and negative lead-out ends of the battery monomer are located on the same side or opposite sides of the battery monomer along the length direction. The busbar assembly comprises a positive busbar and a negative busbar. The first throttling assembly is located between the busbar assembly and the battery assembly and separates the two to form a main cavity corresponding to the battery assembly and a cooling cavity corresponding to the busbar assembly. The shell is provided with a medium inlet and a medium outlet which are in communication with the cooling cavity. After the cooling medium enters the cooling cavity through the medium inlet, at least part of the cooling medium flows to the main cavity through the first throttling assembly. The application realizes the zoned cooling of the busbar and the battery main body according to the needs, and in particular improves the cooling effect of the busbar.

The invention provides a semiconductor device and a preparation method thereof, a substrate is internally provided with a plurality of source and drain trenches which are distributed at intervals, and the source and drain trenches extend into the substrate from the surface of the substrate; forming a first embedded epitaxial layer in the source-drain groove, wherein the source-drain groove is filled with the first embedded epitaxial layer; forming a second embedded epitaxial layer on the first embedded epitaxial layer, wherein the second embedded epitaxial layer covers the top surface of the first embedded epitaxial layer and the exposed part of the top surface of the substrate; and forming a cap layer on the second embedded epitaxial layer. According to the invention, the substrate and the cap layer are separated by using the second embedded epitaxial layer, and the cap layer cannot be in contact with the substrate, so that doped ions in the cap layer are prevented from being diffused into a channel in the substrate, and the short-channel effect is further improved; the first embedded epitaxial layer and the second embedded epitaxial layer can provide pressure stress for the channel together without causing adverse effects on the device, and the process for preparing the second embedded epitaxial layer is relatively simple and low in cost.

The invention provides a model parameter optimization method and device, electronic equipment and a medium, and relates to the technical field of deep learning, the method is applied to a working node in a deep learning model, and the method comprises the steps: obtaining at least one model weight of the deep learning model and a gradient matrix corresponding to the at least one model weight; based on the weight value of each model weight in the at least one model weight, analyzing the gradient transmission state of each model weight in the at least one model weight, so as to generate a structured mask matrix according to an analysis result; and based on the structured mask matrix, performing sparse processing on the gradient matrix to obtain a sparse gradient matrix, and using the sparse gradient matrix to update at least one model weight of the deep learning model. The gradient is sparsely processed by using the globally unified structured mask generated based on the model weight, so that the sparse gradient positions of the working nodes are consistent, the sparse gradient accumulation problem is avoided, and the communication traffic can be stably reduced.

The application discloses a non-woven fabric spraying system and a control method thereof. The non-woven fabric spraying system comprises a liquid preparation tank, a liquid supply pump and a spraying device. The spraying device comprises a support, a first liquid supply main pipe, a second liquid supply main pipe, a first horizontal rod, a second horizontal rod and a plurality of spray guns. The first liquid supply main pipe and the second liquid supply main pipe are horizontally arranged above and below the non-woven fabric respectively and are fixedly connected with the support. The first horizontal rod and the second horizontal rod are located above and below the non-woven fabric respectively and can adjust the position along the column of the support. The spray gun comprises an upper spray gun arranged on the first horizontal rod and a lower spray gun arranged on the second horizontal rod. The first horizontal rod and / or the second horizontal rod can rotate around the axis thereof. The liquid inlet of the liquid supply pump is connected with the liquid preparation tank through a first pipeline. The liquid outlet is connected with a flow divider through a second pipeline. A backflow pipe connected with the second pipeline is connected with the liquid preparation tank and is provided with a backflow valve. The non-woven fabric spraying system can better realize high-precision and low-flow spraying operation.