43 results about "Jet injection" patented technology

The invention relates to the technical field of automatic control, and discloses a pressure closed-loop self-calibration method for an ultrahigh-speed jet injection process, and the method comprises the steps: initializing a system, and building a pressure and temperature combined compensation model; a high-precision sensor is used for collecting real-time pressure and temperature data; by calculating a pressure deviation intelligent switching control strategy, PID is combined with feed-forward compensation in a steady state, and a deep reinforcement learning algorithm is switched to realize quick response in a transient state; automatically triggering closed-loop self-calibration according to operation time or a deviation threshold value, executing zero point and full scale calibration and updating compensation parameters; and carrying out residual analysis by using a digital twinborn model to realize fault diagnosis and early warning. According to the invention, the problems of low control precision and poor long-term stability of an ultra-high-speed jet flow process under nonlinear and large-lag working conditions are solved, and high-precision stable control and system self-adaptive calibration under a wide speed range are realized.

The invention discloses a rocket-based rotary detonation engine combustion chamber structure and application thereof, and belongs to the technical field of rocket engine research. The combustion chamber structure comprises an isolation section, an equal-direction oil injection section and an expansion-concave cavity section which are connected in sequence. A central rocket is arranged in the isolation section and the equal direct oil injection section; and four groups of first ring-jet injection points are arranged on the equal straight oil injection section, two groups of second ring-jet injection points are arranged on the central rocket, and two groups of third ring-jet injection points are arranged on the expansion-concave cavity section. Oil is injected into the expansion-concave cavity section firstly, a pre-detonation pipe is adopted for igniting an oil-gas mixture, rotating detonation waves are formed, the built-in center rocket can provide thrust for the aircraft at the ground zero speed and form an injection effect for air suction, extra thrust is provided when the cruising thrust of the aircraft is insufficient, and when the rotating detonation combustion flameout boundary exists, the detonation effect is achieved. A flame stabilizing mechanism is provided for rotary detonation combustion, and stable work of wide-speed-range and wide-height-range rotary detonation combustion is achieved.

The invention relates to the technical field of metallurgical furnace charge conveying and control, and discloses a top-blown furnace multi-channel supersonic jet type feeding control method and system.The method comprises the steps that flow distribution in a nozzle is achieved through a piezoelectric ceramic high-speed valve installed at a pipeline inlet, and a nozzle servo motor is controlled at the top of a spray gun to adjust the spray angle of the spray gun; the feeding speed, pressure and temperature are monitored in real time through a pressure sensor and a flow sensor arranged in an inlet area of the pipeline and an infrared thermometer mounted at the top of the furnace; the carrier gas flow, the nozzle opening degree and the spraying angle are dynamically adjusted through control of the PLC executing mechanism, and collaborative optimization of the material flow vector, the flow field in the hearth and the heat and mass transfer process is achieved. The system comprises a spray gun, a piezoelectric ceramic high-speed valve, a flow sensor, an infrared thermometer, a nozzle control servo motor, a temperature measurement control small servo motor and a control room. The comprehensive operation efficiency of energy density distribution optimization, reaction efficiency improvement and energy consumption index reduction of the molten pool reactor is finally realized.

The invention belongs to the technical field of household gas stoves, and provides a household infrared stove with high heat intensity and a design method.The stove comprises a valve body and an infrared burner which are sequentially arranged in the airflow direction; according to the valve body, the two independent channels of the main fuel gas channel and the auxiliary fuel gas channel are matched with the main nozzle and the auxiliary nozzle to form a two-strand collision jet flow injection technology, an infrared injection pipe of the infrared burner and the main nozzle are coaxially arranged, and the infrared injection pipe and the auxiliary nozzle are of a non-coaxial structure, so that the injection capacity of the main nozzle is guaranteed, and the service life of the main nozzle is prolonged. The fuel gas injected by the auxiliary nozzle directly rushes to the inner wall of a shrinkage pipe in the infrared injection pipe, and the two jets are injected together; compared with a traditional single-nozzle ejection structure, the amount of ejected air is larger, gas and air are mixed more evenly, the ejection speed of the gas through fire holes of the infrared burner is higher, and the combustion stability is further enhanced in cooperation with the design of the infrared burner and the infrared radiation combustion plate.

The invention relates to a dehydration-free low-calorie konjac composite noodle and a preparation method thereof, and belongs to the technical field of konjac noodle processing, the composite noodle is composed of 40%-60% of konjac powder, 20%-40% of vital gluten, 0.2%-0.9% of trehalose, 0.05%-0.15% of edible calcium salt and less than or equal to 65% of water, and the dry weight ratio of the konjac powder to the vital gluten is 1: (0.5-1.5). The trehalose accounts for 0.5%-1.5% of the dry weight of the konjac powder. The preparation method comprises the following steps: in the premixing process, the konjac powder is sieved and then is mixed with the vital gluten in a negative pressure environment at different speeds; the hydration process adopts three-stage gradient water injection synchronous jet flow to inject a trehalose solution; in the mixing process, a network is constructed through three-section temperature control of a double-screw extruder; in the shaping process, the dough blank is soaked in 0.1%-0.3% calcium salt solidification liquid, treated for 8-12 minutes in a turbulent flow environment at the temperature of 25-35 DEG C and periodically turned over; and finally rinsing and draining to obtain a finished product.

The utility model discloses a biomass briquetting machine oil mist lubrication system which comprises an oil mist generator, a reduction gearbox and a briquetting machine forming chamber, the oil mist generator is connected with a gas source pipeline, an oil mist pipeline, a first oil pump and a second oil pump, and one end of the oil mist pipeline is connected with a jet flow injection distribution valve. An oil suction pipeline and an oil way pipeline are connected to the jet injection distribution valve, a rotating connector is installed at one end of the oil way pipeline, a motor is installed at the input end of the reduction gearbox, a pressing wheel assembly is rotationally arranged in the briquetting machine forming chamber, a pressing wheel bearing is installed between the pressing wheel assembly and the briquetting machine forming chamber, and the motor is connected with the motor. The utility model relates to the technical field of oil mist lubrication, the oil mist lubrication system generates micron-sized oil mist particles through external compressed air and a secondary ultrasonic atomization process, oil mist flow composed of the oil mist particles is conveyed to a part needing to be lubricated through a pipeline, oil liquid is reasonably used, and waste is avoided.

The utility model discloses a linear obstacle laying tool for an underwater obstacle breaking device, which comprises a laying sleeve and a shell, the laying sleeve is provided with internal threads, the shell is provided with external threads, the laying sleeve is provided with a mounting groove, and the shell is inserted into the laying sleeve and is in threaded fit with the laying sleeve. The fixing device has the advantages of being convenient and fast to fix, simple in structure and low in cost; fixation is reliable, and jet injection is not affected.

This invention provides a high-pressure jet injection lawn loosening machine, including a frame, wheel assembly, working unit, and control unit. The working unit includes an injection assembly, a water circuit assembly, and an air circuit drive assembly. The injection assembly includes an injection cylinder, a movable circular pressure plate sleeved on the lower end of the injection cylinder, and an injection tube fixed to the lower end of the injection cylinder and passing through the movable circular pressure plate. An elastic element is provided between the movable circular pressure plate and the cylinder seat of the injection cylinder. The water circuit assembly includes a water tank, a high-pressure pump, a high-pressure storage tank, and a switch valve. The outlet of the water tank is connected to the inlet of the high-pressure pump, and the outlet of the high-pressure pump is connected to the inlet of the high-pressure storage tank. The outlet of the high-pressure storage tank is connected to the injection tube via the switch valve. The air circuit drive assembly includes an air compressor, which is connected to the injection cylinder and used to drive the injection cylinder to move the injection tube in a reciprocating injection motion. This invention allows the site to be used immediately after operation without a recovery period and can be operated by a single person.

The present invention relates to the technical field of jet burners, and particularly relates to a jet unit structure and a dual-component injector. The jet unit structure includes: a fuel nozzle having at least one radial hole provided on its side wall; an oxidizer nozzle, at least a part of which is sleeved inside the fuel nozzle; the interior of the oxidizer nozzle is penetrated and is in communication with the radial hole and a jet port together. In the jet unit structure provided by the present invention, the fuel nozzle and the oxidizer nozzle are arranged in a nested structure, so that the first end of the oxidizer nozzle and the radial hole provided on the side wall of the fuel nozzle jointly form a jet port with the second end of the fuel nozzle.

The invention discloses a central water injection type water ramjet engine which comprises a front end socket, a combustion chamber, a rear end socket, an afterburning chamber and a spray pipe which are connected in sequence. The front explosive blocking ring is arranged at the position of the front sealing head, the rear explosive blocking ring is assembled on a boss of the rear sealing head, the combustion chamber is filled with the propellant grain, the jetting assembly is arranged on the central axis in the combustion chamber, and the ignition assembly is arranged at the position of an ignition connector of the rear sealing head. The engine is integrally assembled in the underwater navigation body to serve as a propelling system. The central injection assembly is adopted, the structure is simple, installation is easy, and the manufacturing cost is reduced; water is directly injected into the center of the combustion chamber through central water injection, so that the water and fuel can be rapidly mixed, the reaction is more sufficient, and the combustion efficiency can be greatly improved.

The utility model relates to the technical field of denitration equipment, and discloses a spray head for a flue gas SNCR denitration jet spray gun, which comprises a contraction section, a throat part, an expansion section and a spray plate which are communicated in sequence, a nozzle is arranged on the spray plate, the spray plate is fixedly connected with the expansion section, the diameter of the contraction section and the diameter of the expansion section are both larger than the diameter of the throat part, and the expansion section is fixedly connected with the expansion section. The connecting positions of the contraction section, the throat portion and the expansion section are in arc transition connection, a plurality of nozzles are formed in the spraying plate and evenly distributed on the spraying plate, the spraying plate is located on the inner side of the expansion section, and the diameter of the spraying plate is matched with the diameter of the expansion section. According to the scheme, atomized liquid drops are refined, dispersed and atomized through the nozzles, and the contact effect of a denitration agent and flue gas is improved; the particle size of fog drops is reduced while the flow rate of the denitration agent is guaranteed, the particle size distribution of the fog drops is uniform, and the flue gas denitration effect is better controlled; multi-angle spraying can be formed through the spraying plate and the spraying head, and the requirement for uniform dripping and spraying of a complex hearth structure is met.

Method for electrically contacting a component (1), wherein the component (1) is arranged on a circuit carrier (10) having a first connection area (11), wherein the first connection area (11) is connected to a second connection area (3) of the component (1) by means of an electrically conductive layer (21), wherein the electrically conductive layer (21) is applied by jet injection, and wherein the component (1) is fixed to the circuit carrier (10) by means of a curable fixing layer (16) in the form of an electrically non-conductive adhesive, characterized in that the adhesive is applied to the circuit carrier (10) such that the height of the adhesive is greatest in the middle of the oppositely arranged first connection areas (11) and decreases towards the first connection areas (11) and is at its lowest height there.and that after the component (1) is placed on the adhesive, the adhesive extends to a top surface (2) of the component (1) at its lateral edge areas and a continuous, non-stepped transition area (19) is created between the connection areas (3, 11).

The present invention belongs to the field of engine combustion chambers and combustion heater devices, and discloses a jet injection design method and nozzle with coaxial bubbles and a pintle. The jet injection design method with coaxial bubbles and a pintle includes determining the technical solution; determining the technical functions of each module; determining the flow rate requirements of each module; and determining the processing method of the coaxial nozzle for bubbles and a pintle. The coaxial nozzle for bubbles and a pintle includes a bubble nozzle and a pintle nozzle with the same central axis. The pintle nozzle is sleeved outside the bubble nozzle, and the outlet of the bubble nozzle is located in the inner cavity of the pintle nozzle. The jet injection design method with coaxial bubbles and a pintle of the present invention adopts a compact layout and partitioned four-cavity design. The obtained coaxial nozzle for bubbles and a pintle has a simple and reliable structure, is light in weight, and has engineering practical value.

To realize the tracking of a gliding stage in a missile which repeats jetting intermittently.SOLUTION: When a monitoring satellite 307 having a plurality of monitoring devices detects a significant high-temperature object, the monitoring satellite 307 transmits flying object information to a satellite integrated command center 810 via a satellite information transmission system 403 having a plurality of communication satellites 308. The flying object information includes detected time information, a monitoring satellite ID, a monitoring device ID, and monitoring data. The satellite integrated command center 810 transmits the flying object information to a countermeasure system 405 including a countermeasure asset 801 and a countermeasure ground center 802. The trajectory prediction device 803 derives the position information and the traveling direction of the monitoring satellite having the ID at the detection time in the flying object information, and the line-of-sight direction of the monitoring device having the ID. Then, the trajectory prediction device 803 extracts the high-temperature object luminance from the monitoring data and derives a line-of-sight vector directed to the high-temperature object.SELECTED DRAWING: Figure 9

The utility model belongs to the technical field of cleaning equipment, and particularly relates to a handheld cleaning device which comprises a cleaning disc assembly and a handheld frame fixedly connected with the cleaning disc assembly, a rotating joint is fixedly arranged in the middle of the cleaning disc assembly in a penetrating mode, and one end of the rotating joint is connected with a high-pressure hose in a penetrating mode. One end of the cleaning disc assembly is connected with a high-pressure hose, the other end of the cleaning disc assembly is connected with a cavitation jet injection pipe in a rotating mode, the cavitation jet injection pipe is communicated with the high-pressure hose through a rotating connector, the cavitation jet injection pipe is transversely distributed in the cleaning disc assembly, and cavitation jet cleaning nozzles are obliquely installed at the two ends of the cavitation jet injection pipe.

The present invention discloses a high-efficiency jet injection tool for marine carbon dioxide storage, which relates to the technical field of carbon dioxide hydrate storage tools. The tool is mainly composed of a continuous pipe quick connector, an open-hole anchoring mechanism, a sliding core locking mechanism, and a jet injection head. The open-hole anchoring mechanism adopts a deep-tooth slip, a long rubber cylinder, an upper one-way valve plate, and a lower one-way valve plate, which enhances the reliability and stability of the tool during carbon dioxide jet injection operations. The sliding core locking mechanism is equipped with a sliding core barrel I, a sliding core barrel II, a locking connection, a bevel guide ring, and a return spring I, which realizes the automatic control of the opening and closing of the jet injection function. The device has a simple structural design and can achieve anchoring and sealing in the case of open-hole drilling, and can also achieve carbon dioxide jet injection without lifting and lowering the pipe string or running other tools. The tool not only ensures the continuity and efficiency of the operation, but also greatly reduces the operating cost and environmental risks.

The invention provides a method for controlling the propagation direction of detonation waves in a non-annular rotating detonation combustion chamber. A combustion chamber head, a combustion chamber outer ring, a rotatable combustion chamber inner column, a driving device and a spark plug are included. Wherein the combustion chamber head comprises an injection structure, an annular radial positioning boss, an annular axial positioning boss, a self-lubricating shaft sleeve and a high-temperature-resistant sealing ring; the rotatable combustion chamber inner column comprises a top end rotating shaft, an outer side axial positioning boss and a center body. The spark plugs are symmetrically arranged, and the number of the spark plugs is two. When the method is implemented, before ignition of the spark plug, the driving device drives the rotatable combustion chamber inner column to rotate by a certain angle, rotary detonation waves propagating in the target direction are induced to be formed after ignition, and then the driving device drives the rotatable combustion chamber inner column to reversely rotate and reset, so that the non-annular rotary detonation combustion chamber is in the optimal working state; and the detonation wave propagation direction is controllable. The method can be used in the fields of detonation propulsion and the like.

The present application relates to a kind of large-scale ramjet fuel injection design method based on boundary layer similarity, comprising: the basic configuration of ramjet is constructed, and by the scale variation of ramjet and the actual working condition and flow variation faced, the variation of boundary layer relative thickness in ramjet is qualitatively analyzed, and qualitative analysis result is obtained;Obtain flow field related information, capture characteristic quantity, and obtain characteristic scale information according to the basic configuration of ramjet;Boundary layer displacement thickness is calculated and corrected using scale effect phenomenon;According to general jet penetration depth formula, the corrected boundary layer displacement thickness and the jet penetration depth required for design are brought in, and fuel jet dynamic pressure ratio and jet orifice size are solved;The fuel jet dynamic pressure ratio and jet orifice size obtained are applied to the fuel injection design of ramjet, and the transverse jet injection correction scheme for the variation of boundary layer relative thickness is formed.

The utility model provides a cluster type jet mixer which comprises a mixing cavity pipe body, a water inlet pipe body and a water outlet pipe body, a first blind flange and a second blind flange are arranged on the two sides of the mixing cavity pipe body respectively, a first through hole and a second through hole are oppositely formed in the first blind flange and the second blind flange, and a nozzle is arranged in the first through hole. A first annular boss is arranged at the inlet end of the nozzle, a first threaded counter bore is formed in the first annular boss, a throat pipe is arranged in the second through hole, a second annular boss is arranged in the middle of the throat pipe, a second threaded counter bore is formed in the second annular boss, and a third blind flange is arranged at one end of the water inlet pipe body. A third through hole matched with a nozzle inlet is formed in the third blind flange, a first annular groove is formed in the outer side of the third through hole, a fourth blind flange is arranged on one side of the water outlet pipe body, a fourth through hole matched with the outer diameter of a throat pipe is formed in the fourth blind flange, and a second annular groove is formed in the outer side of the fourth through hole; the utility model has the advantages of large jet injection specific surface area, high injection efficiency and the like.

The present invention relates to the technical field of injection-production engineering in oil and gas field development, and particularly relates to a jet injection-production device in the same well and a usage method thereof. The technical solution is as follows: A jet pump is connected to the surface wellhead through an oil pipe and a small-diameter oil pipe. A retrievable pump core is installed in the jet pump. The lower part is connected to a jet injection pump through an oil-blocking and water-filtering device. The outlet pipe of the mixed liquid is located in the water injection layer below the packer. A part of the high-pressure power liquid injected from the ground enters the jet pump and entrains and sucks the low-water-cut crude oil to the ground. The remaining high-pressure power liquid passes through the retrievable pump core in the jet pump and enters the jet injection pump, entrains and sucks the formation water that has been deoiled and filtered by the oil-blocking and water-filtering device and injects it into the water injection layer. The beneficial effects are as follows: The structure is simple, the failure rate is low, the operation is reliable, the pump inspection period is long, it is convenient for well washing and pump inspection, the investment and operation costs are saved, and it is more suitable for large-angle wells, infill wells in the middle and late stages of exploitation, multi-layer separate injection-production development in the high-water-cut period, and meets the essential requirements of energy conservation and consumption reduction.

The application provides a jet ignition combustion chamber control method and device, a jet ignition combustion chamber, an electronic device and a storage medium. The combustion chamber comprises a pre-chamber and a main combustion chamber. A spark plug is arranged in the pre-chamber. A jet injection hole is arranged at the bottom of the pre-chamber. The pre-chamber and the main combustion chamber are communicated through the jet injection hole. The method comprises the following steps: obtaining the excess air coefficient of the pre-chamber; if the excess air coefficient reaches a preset threshold value, controlling the spark plug to ignite, so that the high-temperature jet generated by the pre-chamber enters the main combustion chamber through the jet injection hole, and the main combustion chamber is caused to occur multi-point spontaneous combustion. The technical scheme of the embodiment of the application can improve the thermal efficiency of the engine and reduce harmful gas emission.

The present invention discloses a jet injector with a heating or cooling element that controls the temperature of the fluid or drug, as it flows through the body or out the outlet of the jet injector. In one example a jet injector is disclosed comprising a body, to house a fluid or drug a mechanism in which to develop a pressure in the fluid or drug an outlet that the fluid or drug is ejected out of due to the pressure developed, where in use, the fluid or drug is injected into a patient a heating or cooling element configured to control the temperature of the fluid or drug, as it flows through any one or more of: the body or the outlet.

The present application relates to a kind of oxygen-removing device low-temperature reheat steam source pressure regulating system, including entity equipment and control hub in the technical field of thermal power plant cogeneration and boiler bypass heat supply stable pressure regulation and control, entity equipment includes feedforward perception matrix, acoustic muffling flash device, residual waveform sensing node, pneumatic damping valve array and porous jet pipe network.System acquires parameters through feedforward perception matrix, utilizes evolution prediction module to output the space coordinates and pressure wave frequency band of unvaporized water droplet induced flash expansion.Stable pressure intervention module adjusts the physical volume of acoustic muffling flash device according to prediction result and activates microwave phase change excitation field, eliminates pressure pulsation and promotes water droplet instantaneous phase change.At the same time, calculate the antiphase compensation waveform to drive pneumatic damping valve array to implement fluid interference cancellation, smooth steam passes through porous jet pipe network self-excitation oscillation jet injection, eliminate vacuum negative pressure area, prevent oxygen-removing device internal transient water hammer.

An internal combustion engine control device includes a correlation index estimation unit configured to estimate a piston temperature correlation index correlated with a temperature of a piston based on an internal combustion engine operating condition parameter and an oil jet parameter for injecting oil to a back surface of the piston; and a hydraulic pressure setting unit configured to set a hydraulic pressure of an oil jet based on the piston temperature correlation index and an evaporation parameter of fuel attached to the piston, wherein when the piston temperature correlation index is less than a first predetermined value determined based on a temperature corresponding to a fuel evaporable condition as the evaporation parameter, the hydraulic pressure setting unit sets the hydraulic pressure of the oil jet to a hydraulic pressure at which oil jet injection can be stopped.

The application discloses a kind of chaotic injection bath smelting multi-physics field coupling optimization methods based on machine learning, comprising: based on the distribution of two-mode adaptive chaotic switching mechanism regulation injection gas flow, according to the bubble number density fluctuation rate of real-time monitoring electrical resistance tomography adaptive selection chaotic mode;ERT is used to monitor the bath, and the distribution of multi-physics field is reconstructed by Tikhonov regularization, and key parameters such as flow field uniformity coefficient, bubble number density, bubble average equivalent diameter and slag layer thickness are extracted;Physical information constrained deep generative adversarial network is constructed, and fluid mechanics conservation equation is embedded into generator loss function for adversarial training;According to the deviation of model prediction result and preset threshold, PID control law adjusted by particle swarm optimization is used to dynamically adjust injection parameters.The application realizes the intelligent matching of chaotic injection strategy and actual state of bath, breaks through the working condition adaptability limitation of single chaotic mapping, and significantly improves smelting efficiency and furnace condition stability.

This invention discloses a novel method for balanced infiltration of ion-adsorption rare earth minerals using radially grooved jet injection. The method includes constructing a central hole within the ore body, constructing horizontal grooves, and numerically controlled pressure regulation. The central hole comprises multiple injection holes of varying heights penetrating the ion-adsorption rare earth ore body. The horizontal grooves are constructed using a jet-grooving structure for creating horizontal grooves and discharging slurry. The jet-grooving structure includes a radial jet nozzle, a high-pressure pump, a high-pressure hose, a slag discharge hose, and a valve. Two sets of high-pressure pumps are provided. The numerically controlled pressure regulation includes a valve, an injection hose, and a connecting pipe. This invention uses a longitudinal injection master hole as the central hole and employs small-sized radial jet nozzles to construct a multi-layered, three-dimensional, horizontally circular grooved, three-dimensional injection guiding structure within the ore-bearing layer. This forms a large-scale, balanced, three-dimensional leaching space, significantly reducing the amount of injection holes required in the topsoil layer and lowering the risk of topsoil pollution and landslides induced by the large-scale intrusion of leaching solution into the topsoil layer during injection.

The invention discloses a preparation process of functional warm-keeping cloth flocculus, and belongs to the technical field of fabrics, a plurality of Taylor cones are formed under a high-voltage electric field, and multi-jet injection is formed by electrostatic spinning to prepare fibers with a skin-core structure and fibers with an aerogel nano-pore structure, so that the functional warm-keeping cloth flocculus is prepared. Then, double diffusion is formed through a high-volatility solvent in electrostatic spinning jet flow and water molecules in a high-humidity environment, under the action of a high-voltage electric field, the stability of the charged jet flow is reduced, bending instability is generated, a curled structure is formed after jet flow irregular phase separation and solidification are induced, and after the residual solvent is volatilized through a polymer skeleton and hot air heating, the electrostatic spinning jet flow is formed. Partial shrinkage and entanglement hot melting solidification are formed among the fibers through heating and micro dehydration, so that the fibers of the functional warm-keeping fabric flocculus are of a surface groove-shaped wrinkle structure, more static air molecules are accumulated and stored, and the forming stability of the functional warm-keeping fabric flocculus is guaranteed.

The present invention discloses an APF active power filter with high heat dissipation function, which belongs to the technical field of APF active power filters, and includes a box body, a reciprocating jet assembly and a driving assembly installed on the top of the box body, and an air intake assembly installed on the side of the box body; the driving assembly drives the reciprocating jet assembly to rotate to realize reciprocating jet injection; the driving assembly simultaneously drives the air intake structure of the air intake assembly to intake air, and at the same time, the driving assembly drives the dust removal structure of the air intake assembly to remove dust. Through the above-mentioned method, the present invention can realize that the gas enters the box body after being filtered, and avoids dust from entering the chassis and affecting the normal use of the APF active power filter; at the same time, the dust removal structure scrapes off the dust accumulated at the filter hole, which can avoid dust clogging the filter hole and affecting the intake air flow rate; the present invention can realize reciprocating jet injection by driving the reciprocating jet assembly through the driving assembly, thereby realizing cooling and heat dissipation of the components in the chassis, and avoiding the APF active power filter malfunctioning due to excessive component temperature.

The utility model discloses a multilayer pump for coal bed gas drainage, which comprises a working barrel, one end of the working barrel is provided with a sealing seat, the top end of the sealing seat is provided with a tail end main body, a flow suction cavity is arranged between the sealing seat and the tail end main body, and the top end of the tail end main body is connected with a first series main body; according to the multi-layer pump for discharging and adopting the coal bed gas, the multi-layer pump adopts multi-stage jet injection, consists of a multi-stage nozzle, a suction chamber, a mixing chamber, a diffusion part and the like, and is free of moving parts and shaft seals, so that the multi-layer pump is more convenient to repair and maintain, the operation cost is reduced, the multi-layer pump can smoothly pass through inflection points, and the service life of the multi-layer pump is prolonged. The device has the advantages that the device can carry pulverized coal and tiny particles well, pump clamping is avoided, eccentric wear is avoided, the pump inspection period is long, maintenance is simple, stability is good, the pump inspection and well repair period and production and recovery benefits can be improved, multiple sections of serially-connected main bodies can be added according to working condition requirements, and the working efficiency is optimal.

A jet injection system (10) comprising (i) a microfluidic device (100) for jet ejection and (ii) a laser-based heating system (200), wherein: —the microfluidic device (100) comprises a hosting chamber (110) defined by a chamber wall (120), the hosting chamber (110) having a chamber height he selected from the range of 5-400 μm, a chamber width we selected from the range of 2hc-10hc, and a chamber length lc defined by a first chamber end (111) and a second chamber end (112), wherein the second chamber end (112) comprises a first chamber opening (131) for jet ejection from the hosting chamber (110), and wherein the hosting chamber (110) is configured to host a liquid (50); —the laser-based heating system (200) is configured to provide laser radiation (201) to one or more of the chamber wall (120) and a liquid (50) in the hosting chamber (110).