54results about How to "Change the circulation area" patented technology

The invention discloses a multistage parallel hydrocyclone capable of regulating flow velocity. The multistage parallel hydrocyclone comprises a rack body and a cyclone cylinder, wherein the inner cavity of the cylinder is divided into a solid-liquid separation cavity provided with a liquid inlet and a solid outlet cavity by virtue of a transverse separator; an upper end cover and a conical joint are respectively arranged at the upper and lower ends of the cyclone cylinder; the hydrocyclone also comprises multiple cyclones consisting of at least one cyclone cylinder provided with a longitudinal cutting seam, an overflow pipe and a packing bushing provided with multiple radial threaded holes; the upper end of the cyclone cylinder is fixedly inserted into the upper end cover, and the lower end of the cyclone cylinder penetrates through the transverse separator; the overflow pipe is inserted into the cyclone cylinder, an annular cavity is formed between the overflow pipe and the cyclone cylinder, a flange plate which is fixedly connected with the upper end cover in a detachable manner is fixedly arranged on the overflow pipe, and a positioning hole is formed in the outer side surface of the flange plate; the packing bushing is arranged in the annular cavity and is fixedly connected with the overflow pipe by virtue of a screw; the hydrocyclone further comprises a manifold structure consisting of a total joint and multiple pipelines. According to the hydrocyclone, different liquid production capacity conditions are met by virtue of the number of the started cyclones, and the flow velocity of the oil-gas mixed solution entering the cyclone cylinder is changed by changing the vertical position of the packing bushing, so that a good solid-liquid separation effect is achieved.

The invention discloses a piezoelectric self-sensing based adjustable damper. The piezoelectric self-sensing based adjustable damper comprises an upper lifting lug, a dustproof cover, a piston rod, a guide seat assembly, a working cylinder barrel, a working piston assembly, a seal ring, a floating piston, a closed air chamber and a lower lifting lug, wherein the working piston assembly comprises a compression block, a limiting block, a limiting rod, a piezoelectric valve plate, a piston, a flow valve, a piston packing ring, a rebound valve, a preset normal open hole and a compression nut; the piezoelectric valve plate is formed by connecting a plurality of piezoelectric displacement units in series; each piezoelectric displacement unit is composed of a piezoelectric material stack layer and a displacement enlargement mechanism. The piezoelectric valve plate generates induced charge under the action of oil pressure, extracts induced voltage and exerts control voltage via a bridge circuit to change the size of the valve plate so that the size of a throttling area changes and a damping coefficient is adjustable. Based on the piezoelectric self-sensing effect, a sensor and an actuator are integrated on the same valve plate, the piezoelectric self-sensing based adjustable damper is simplified in structure, stable to control and high in dynamic response speed, and the capacity coupling is avoided.

The invention provides a pilot-operated safety valve with modulation characteristic, which comprises a main valve and a modulation type guide valve, wherein a valve seat of the modulation type guide valve is fixed in the lower part of a cavity of a guide valve body; a guide valve piston is arranged above the cavity in the guide valve body and the valve seat of the guide valve; the middle upper part of a guide valve shaft is installed in the guide valve piston, and the lower part thereof is arranged in the valve seat of the guide valve; the connecting part between the upper part of the guide valve shaft and the guide valve piston is provided with an inlet sealing ring; and the connecting part between the lower part of the guide valve shaft and the valve seat of the guide valve is provided with an outlet sealing ring. The pilot-operated safety valve can be used for effectively controlling the pressure of an air chamber of the main valve, leads the pressure of the air chamber to be slowly reduced along with the augment of overpressure value, and ensures the opening height of the main valve to be gradually changed along with the overpressure value, thus guaranteeing the circulation area to be changed along with the demand of release quantity; and the discharge capacity can be adjusted according to the actual demand of the system for overpressure protection.

The invention provides a heat exchanger, which comprises a collecting pipe and a distributor, wherein the distributor is arranged in the collecting pipe; and a clearance is formed between an edge in a longitudinal direction of the distributor and an inner wall of the collecting pipe. According to the distributor of the heat exchanger, refrigerating fluid can be distributed uniformly, and the process is simple.

The invention provides a reverse osmosis water purifier with a concentrated water regulating controller and belongs to the technical field of water production. The reverse osmosis water purifier is used for solving the problems of water resource waste and the like because the water producing speed of the existing reverse osmosis water purifier is gradually reduced. The reverse osmosis water purifier with the concentrated water regulating controller comprises a reverse osmosis membrane filter and a water storage pressure barrel; the regulating controller comprises a main body; the main body is provided with a concentrated water inlet, a concentrated water outlet and a purified water inlet, which are communicated with each other; a tapered water feeding hole is formed between the concentrated water inlet and the concentrated water outlet; a movable slider is arranged in the purified water inlet; an ejector pin is arranged at one end of the slider; an adjusting cap is fixedly connected to the end portion of the purified water inlet in a threaded sealing manner; a spring sleeves the slider; one end of the spring props against the main body, while the other end of the spring props against the slider; when the slider moves away from the adjusting cap, the ejector pin gradually goes deep into the water feeding hole to reduce the flow area of the water feeding hole. The reverse osmosis water purifier has the advantages of high water producing speed and reduction of water resource waste.

The invention discloses a guide, a method used for adjusting the circulation area of the throat and a turbine engine. The tail on the pressure surface of a guide vane of the guide is provided with a pore; the distance from the pore to the tail of the guide vane is equal to 4% to12% of the linear distance between the tail of the guide vane and the head of the guide vane. The circulation area of the throat is changed by spraying the air into the rear of the throat of the guide through the pore. The total pressure of the jet can be continuously changed in order to implement continuous adjustment of the throat area of the guide, avoid the loss of the leakage flow of a vane tip and reduce the separation of a suction surface. The invention has the advantages of simple structure and high efficiency, and is especially suitable for a variable cycle turbine engine, etc.

The invention discloses an ejector capable of automatically regulating an area ratio along with generating temperature and a jet type refrigerating machine with the same. The ejector capable of automatically regulating the area ratio along with the generating temperature comprises an ejector cavity and a thermometer bulb communicated with a drive chamber, wherein the ejector cavity comprises a steam chamber with a working fluid nozzle, and a regulating cone coaxial with the working fluid nozzle is arranged therein; a regulating piece for dividing the steam chamber into the drive chamber and a driven chamber independent from each other is arranged therein; the regulating piece regulates the axial movement of the regulating cone in real time according to pressure signals of the thermometer bulb so as to regulate the fluid nozzle flow area. The ejector capable of automatically regulating the area ratio along with the generating temperature breaks through the restraints of traditional ideas, the working fluid nozzle flow area is changed through the position change of the regulating cone in the axial direction of the working fluid nozzle due to the deformation or move caused by the regulating piece change along the generating temperature, the pressure at a working fluid inlet, the pressure of the thermometer bulb and a spring, and then the ejector area ratio is changed, and the ejector can work under the best size.

The invention discloses an ejector with the area ratio automatically adjusted along with evaporation temperature. The ejector comprises a vapor chamber, an adjustment chamber and a thermal bulb, wherein a working fluid nozzle is arranged on a gas outlet of the vapor chamber, and a coaxially arranged adjusting cone is arranged in the working fluid nozzle; an adjusting piece is arranged in the adjustment chamber; an inner cavity of the thermal bulb is communicated with a driving chamber, and the thermal bulb is used for sensing the temperature of ejected fluid, converting the temperature into a pressure signal and outputting the pressure signal; according to the pressure signal of the thermal bulb, the adjusting cone is adjusted by the adjusting piece in real time to axially move, and thus the flow area of the working fluid nozzle can be adjusted. The invention further discloses a refrigerating machine with the ejector. The ejector breaks through constraints of a traditional thought, through changes of the position of the adjusting cone in the axial direction of the working fluid nozzle caused by deformation of a membrane along the evaporation temperature under the combined action of the pressure of an outlet of an evaporator, the pressure of the thermal bulb and a spring, the flow area of the working fluid nozzle is changed, the area ratio of the ejector is changed, and thus the ejector can work with the optimum size.

The invention discloses a variable flow area suction nozzle applied to a road sweeper. The variable flow area suction nozzle comprises a suction nozzle body and a conveying pipe arranged on the suction nozzle body, as well as a front air baffle plate arranged at the front end of the suction nozzle body and a rear air baffle plate at the back end of the suction nozzle body, wherein air inlet passages are formed between the bottom ends of the front air baffle plate and the rear air baffle plate and road surface when the sweeper works; a suction inner cavity communicated with the conveying pipe is formed among the suction body, the front air baffle plate and the rear air baffle plate; a tongue plate arranged on the suction nozzle body is arranged in the suction nozzle inner cavity; and the tongue plate can swing when the sweeper works so that the cross-sectional flow area of the suction inner cavity is increased or reduced. By optimizing the flow field, the suction nozzle disclosed by the invention can guarantee relatively good adaptability of the road sweeper to dense garbage and light garbage on the ground, so that the adaptability of the road sweeper to the road garbage is enhanced, and the sweeping quality and working efficiency of the road sweeper are improved.

The invention relates to a throttling valve which comprises a valve body, a valve plate and a valve rod. The valve plate and the valve rod are installed on the valve body, the valve body is provided with first throttling holes, and the valve plate is provided with second throttling holes. Worm wheel teeth are arranged on the edge of the valve plate, and worm teeth matched with the worm wheel teeth are arranged on the valve rod. The worm wheel teeth are meshed with the worm teeth, and thus the worm wheel and worm transmission connection is achieved on the valve plate and the valve rod. The second throttling holes in the valve plate can be correspondingly staggered or communicated with the first throttling holes in the valve body under the transmission of the valve rod to the valve plate. According to the throttling valve, the fluid flowing area can be conveniently adjusted, a flange of a pipeline does not need to be demounted or mounted in the adjusting process, and thus the phenomenon of outer leakage of fluid in the prior art can be avoided.

The invention discloses a T-shaped three-way ball valve with a sewage discharge function. The T-shaped three-way ball valve comprises a left valve body, a right valve body, a valve core and a sewage discharge ball valve. The two ends of the valve bodies are open to form an inlet runner. The periphery of the right valve body is provided with a connection end opening, a seal end, a first outlet runner and a second outlet runner. A sewage discharge runner is formed in the bottom of the right valve body. One end of the left valve body is fixedly connected to the connection end opening of the right valve body. The incomplete-spherical valve core is arranged in a valve cavity. A large valve rod used for driving the valve core to rotate is connected to the upper end of the valve core. The sewage discharge runner is located under the valve core and is internally provided with the sewage discharge ball valve. The lower end of the valve core is connected with the sewage discharge ball valve. The three-way ball valve can keep the flowing area of a valve body water inlet channel during flow adjustment and distribution and then can keep the flow of the water inlet channel unchanged, the three-way ball valve can be effectively protected when corrosive liquid is conveyed, corrosion of the corrosive liquid to the three-way ball valve is reduced, and the service life of the three-way ball valve is prolonged.

The invention discloses a flow-adjustable centrifugal fuel nozzle of an engine. The centrifugal fuel nozzle comprises a nozzle shell body, a swirler, a spraying opening and an adjustable screw, wherein the nozzle shell body is of a hollow structure, internal threads are arranged in the nozzle shell body, and external threads are correspondingly arranged on the lower half section of the spraying opening; the spraying opening is connected with the nozzle shell body through the threads, and an inner cavity is formed in the spraying opening; the inner cavity is cylindrical, internal threads are arranged on the lower half section of the inner cavity, and external threads are arranged on the adjustable screw; and the adjustable screw is arranged in the inner cavity in a threaded connection manner, and the swirler is arranged above the adjustable screw. The flow-adjustable centrifugal fuel nozzle of the engine has the advantages that the workload of experiment debugging can be greatly reduced, the production time can be greatly saved for batch production, and meanwhile, the structure of the fuel nozzle can greatly reduce the difficulty of product maintenance.

The invention discloses a self-closed valve for a gas transmission pipeline. The self-closed valve comprises a valve body formed by an air inlet channel, an air outlet channel and a control cavity, and the valve body has a T-shaped structure; the upper part of the control cavity is provided with a valve cover in a sealing way; the lower end of a valve rod which extends into the control cavity from the center of the valve cover is fixedly connected with valve cores arranged in the air inlet channel and the air outlet channel; the upper end of the valve rod arranged outside the valve cover is provided with a control handle; a torsion spring is sheathed on the valve rod arranged in the valve cover; the two ends of the torsion spring are respectively connected with the valve rod and the valve cover; a locating plate is sheathed on the valve rod close to the valve cores in a sliding way; the peripheral surface of the locating plate is connected with the inner wall of the control cavity in a sealing way by an elastic ring film; limiting plates are fixedly arranged on the valve rod above the locating plate at intervals; locating pits and locating bosses arranged at the positions matched with those of the locating pits are respectively arranged on the surfaces where the locating plate is opposite to the limiting plates. The self-closed valve has the advantages of being simple in structure, and being capable of realizing the function of automatically closing after the gas is cut off.

The invention provides a square emulsion preparing device comprising a main stream inflow pipeline, a main stream contraction section, a main stream throat pipeline, a main stream diffusion section, a main stream outflow pipeline and a lateral face lead-in pipe, wherein the main stream inflow pipeline, the main stream contraction section, the main stream throat pipeline, the main stream diffusion section and the main stream outflow pipeline are sequentially communicated; the lateral face lead-in pipe is arranged at the upper end of the main stream throat pipeline and is communicated with the main stream throat pipeline; the main stream inflow pipeline, the main stream throat pipeline and the main stream outflow pipeline are square pipelines; the main stream throat pipeline and the main stream diffusion section are in a quadrangular-pyramid-like structure; channels I and channels II are respectively arranged on the upper lateral wall faces and the lower lateral wall faces of the main stream inflow pipeline, the main stream contraction section, the main stream throat pipeline, the main stream diffusion section and the main stream outflow pipeline; and the mounting positions of the upper wall face and the lower wall face of the emulsion preparing device can be adjusted according to demands in a quick assembly process. According to the square emulsion preparing device provided by the invention, the main stream inflow pipeline, the main stream outflow pipeline and the main stream throat pipeline are designed to be square pipelines, so that the convenience in machining can be realized, and a plurality of methyl alcohol solution lead-in pipelines are arranged on the lateral face of the throat part; and diesel flows through the main stream inflow pipeline, the main stream contraction section, the main stream throat pipeline, the main stream diffusion section and the main stream outflow pipeline, so as to form three-phase methyl alcohol, water and diesel emulsion.

The invention provides an exhaust throttle device for an engine SCR thermal management system. The exhaust throttle device is arranged at an exhaust pipe located at the front end of an SCR after-treatment device. The exhaust throttle device comprises a center shaft, a plurality of fan-blade shafts, a plurality of fan blades and a fan blade opening degree regulating mechanism, wherein the center shaft is supported inside the exhaust pipe, the fan-blade shafts penetrate through the exhaust pipe from the outer side in the radial direction and are inserted in the center shaft in a rotatable mode, each fan blade is fixedly arranged on the corresponding fan-blade shaft, and the fan blade opening degree regulating mechanism is arranged on the outer portion of the exhaust pipe. The fan blade opening degree regulating mechanism and the multiple fan-blade shafts are linked, and rotation of the fan-blade shafts can be controlled according to orders of an engine control unit, so that the opening of each fan blade is regulated. The invention further provides an engine SCR thermal management system with the exhaust throttle device.

The invention discloses a shock absorber and a vehicle, which comprises a cylinder body used for defining a piston chamber for containing an ionic solution, a piston movably arranged in the piston cavity comprising a microporous membrane and an electrode which are arranged in a stacked mode. The electrode is arranged at a position provided with a flow passage through which the ionic solution passes. The shock absorber is configured to adsorb ions when the electrode is energized to adjust the flow area of the microporous membrane. According to the shock absorber disclosed by the invention, theflow area of the microporous membrane can be changed through the adsorption effect of the electrode on ions in the ion solution, so that the damping force of the shock absorber can be adjusted to adapt to the current running state, accordingly the adjusting mode is simple, and the adjusting effect is good.

The invention discloses a slag falling device and a circulating fluidized-bed boiler. The slag-falling device comprises a slag discharging pipe (1), a conveying pipe (2) and a slag feeding pipe (3), wherein an upper end port of the slag discharging pipe (1) is communicated with a slag discharging port of the boiler, and a lower end port of the slag discharging pipe (1) is communicated with an upper end port of the conveying pipe (2); and an upper end port of the slag feeding pipe (3) is communicated with a lower end port of the conveying pipe (2), and a lower end port of the slag feeding pipe (3) is communicated with a slag feeding port of a slag cooler. The slag falling device also comprises an air inducing component which is communicated with the conveying pipe (2) and can form a low-pressure zone above the conveying pipe (2). The air inducing component forms the low-pressure zone above the conveying pipe, so that the gas flow which is carried into the slag cooler by bottom slag when the bottom slag flows downwards is reduced, and a slag running phenomenon caused by lubrication and fluidization effects of gases is avoided; and at the same time, gases entering the low-pressure zone flow in a single phase, so that the wind volume and the wind speed are easy to control.

The invention provides a bipolar plate assembly for an oxyhydrogen fuel cell, the bipolar plate assembly comprises a bipolar plate body, the bipolar plate body is provided with a flow channel, the flow channel is internally provided with a wedge-shaped structure, and the inclined surface of the wedge-shaped structure is inclined upwards along the flow direction of gas in the flow channel; and a plurality of protrusions are arranged on the wedge-shaped structure, and the top ends of the protrusions are lower than the top end of the flow channel. According to the invention, the local flow area of the flow channel is changed while the overall flow area in the flow channel in the airflow direction is reduced, the overall airflow distribution uniformity of the flow channel is improved, the airflow speed near an outlet is improved, the local disturbance of the flow channel is enhanced, the transmission of reaction gas to an electrode is promoted, and the drainage capacity of the bipolar plate is improved.

The invention relates to a fan housing for an engine cooling module and a control method of the fan housing. The fan housing comprises a fan housing main body, a cooling fan ventilating opening formed in the fan housing main body, a grid ventilating opening and a controller; and the grid ventilating opening is internally provided with a plurality of driving grid assemblies electrically connected with the controller correspondingly in parallel, and the controller controls the opening magnitude of the grid ventilating opening through the driving grid assemblies. According to the driving condition of an automobile, the cooling airflow flow required by the cooling module and the actual cooling airflow flow are calculated, the cooling fan rotation speed and the opening of the driving grid assemblies are controlled through the controller, and the requirement for the cooling airflow flow is met. Compared with the prior art, the opening magnitude of the grid ventilating opening in the fan housing is controlled through the driving grid assemblies so as to change the circulation area of the cooling airflow, and real-time control over the cooling airflow flow in the engine cooling module is achieved; and besides, the rotation speed of a cooling fan can be the minimum, energy is saved, consumption is lowered, and the NVH performance of the whole automobile is improved.

The invention discloses an ejector capable of automatically regulating an area ratio along with condensing temperature and a jet type refrigerating machine. The ejector capable of automatically regulating the area ratio along with the condensing temperature comprises a steam chamber and a diffusion chamber, the steam outlet of the steam chamber is provided with a working fluid nozzle, and a regulating cone is arranged in the working fluid nozzle; the outlet of the diffusion chamber is provided with a regulating chamber; regulating membranes are arranged in the regulating chamber; the ejector capable of automatically regulating the area ratio along with the condensing temperature further comprises a cavity and a thermo-bulb communicated with a drive chamber, and the thermo-bulb is used for sensing the temperature of fluid at the fluid outlet after being condensed and converting the temperature into a pressure signal to output; the regulating pieces regulate the axial movement of the regulating cone in real time according to the pressure signal of the thermo-bulb so as to realize the regulation for the working fluid nozzle flow area. The ejector capable of automatically regulating the area ratio along with the condensing temperature breaks through the restraints of traditional ideas, the working fluid nozzle flow area is changed through the position change of the regulating cone in the axial direction of the working fluid nozzle due to the deformation caused by the membrane change along with the condensing temperature, the pressure at the fluid outlet, the thermo-bulb pressure and a spring, and then the ejector area ratio is changed, and the ejector can work under the best size.

The invention belongs to the technical field of aero-engine digital control, in particular to an ignition fuel oil flow control method for circled oil supply of an auxiliary power unit. The duty ratiocontrol mode is adopted, and in other words, the on / off state is achieved quickly through a switch; the auxiliary power unit (APU) is adjusted to start the fuel oil flow at the ignition stage; and the method aims at solving the problems that at the ignition stage of the APU, when a main oil way of a fuel oil distributor is on, due to the fact that the area of a fuel oil flow channel is increasedsuddenly, the fuel oil flow is excessively large, the fuel oil pressure is excessively low, fuel oil atomization is not conducted completely, a fire source formed when oil supply is conducted througha start oil way before the main oil way is on is extinguished by the excessive low pressure, and the flameout failure is caused in the start process. By means of the method, the fuel oil flow can be reduced, and the problems that when start is conducted under the upper air condition, the original constant flow of the APU start oil way is excessively large, and ignition cannot be achieved can be solved.

The invention discloses a microchannel heat exchanger and belongs to the technical field of air conditioner heat exchange. The heat exchanger comprises a left upper end cover, a process adjusting device, a refrigerant inlet pipe, a left liquid collecting pipe, a refrigerant outlet pipe, a left lower end cover, fins, porous flat pipes, a right lower end cover, a right liquid collecting pipe, a right upper end cover and a sleeve; the porous flat pipes are connected with holes in the left liquid collecting pipe and the right liquid collecting pipe, the fins are arranged among the porous flat pipes, the refrigerant inlet pipe and the refrigerant outlet pipe are arranged on the left liquid collecting pipe, the sleeve and the process adjusting device are arranged in the left liquid collecting pipe, and the left liquid collecting pipe, the sleeve and the process adjusting device are coaxial. The microchannel heat exchanger provided by the invention can change the quantity of the porous flat pipes in each process, so as to achieve the purpose of changing the refrigerant flow area in each process, and enabling the heat exchange performance and the pressure loss of the microchannel heat exchanger to reach an optimal state. According to the invention, the operating performance and the safety of a refrigerating system can be improved.

The invention relates to a connecting structure of a small flue and a waste-gas opening and closing device. The connecting structure is characterized in that a partitioning wall is arranged in the small flue and partitions the small flue into two branched flues; the connecting structure comprises a small-flue connecting pipe, a partitioning plate and an inserting plate; one end of the small-flue connecting pipe is connected with the small flue, and the other end of the small-flue connecting pipe is connected with the waste-gas opening and closing device; one side of the small-flue connecting pipe, close to the small flue, is provided with the partitioning plate along the longitudinal direction; one end of the partitioning plate is connected with the partitioning wall in the small flue, andthe small-flue connecting pipe is partitioned into a connecting channel I and a connecting channel II; one side of the small-flue connecting pipe, close to the small flue, is provided with an inserting plate along the horizontal direction; the inserting plate can close the connecting channel I or the connecting channel II partially or wholly. The connecting structure has the beneficial effects that the partitioning plate and the inserting plate are arranged on the small-flue connecting pipe and are matched with the small flue with the partitioning wall for use, so that adjustment of the flue-gas flow area is realized and the production need of a top-mounted tamping integrated coke furnace is met.

The invention discloses an electric heating device for a large-section air channel uniform flow field. The electric heating device comprises an air channel lined mica plate, air channel bearing metal plates, high-temperature-resistant ceramic isolation fasteners, metal triangular wave heating tapes, heating tape connecting assemblies and a connecting assembly insulating glue wood plate, wherein the metal triangular wave heating tapes are connected and positioned in a rhombus form with upper troughs opposite to lower peaks through the high-temperature-resistant ceramic isolation fasteners; on the heating tape connecting assemblies on the left and right sides, the metal triangular wave heating tapes are electrically connected in series and in parallel through connecting assembly adapting and fixing bolts according to a certain design; a control loop is constructed by an electric power regulator, a temperature controller and a temperature sensor in order to control the heating temperature of the air flow field uniformly and accurately. In the electric heating device for the large-section air channel uniform flow field, the widths of the heating metal tapes can be designed according to heating power along the air flow direction, thereby fulfilling the aim of controlling the heat exchange area and obtaining a high-quality and uniform temperature air flow field.

The invention relates to a fuel assembly with a compact structure, a reactor and a mobile carrier, the fuel assembly with the compact structure comprises a nuclear fixing plate, a plurality of fuel rods, a first guide plate, support rings and throttling fins, the throttling fins are fixed on the outer side walls of one ends of the fuel rods, the plurality of fuel rods are respectively sleeved with the support rings, the first guide plate is arranged on the plurality of fuel rods in a penetrating manner and is supported on the supporting ring, and the other ends of the fuel rods are assembled and fixed on the nuclear fixing plate; and the first guide plate and the support ring are respectively made of a reactor core coolant. The first guide plate restrains and limits the middle of the fuel rod, the first guide plate located in the middle of the fuel rod is limited and supported through the supporting ring, and the first guide plate and the supporting ring are made of a reactor core coolant, are in a solid state at normal temperature to achieve a guide function and are melted before operation to avoid influence on flowing of the reactor core coolant; and the influence on the flow of a reactor core coolant is further reduced, and meanwhile, the adverse influence of a structural material on neutron performance is avoided.

The invention discloses a micro flow regulating valve which comprises a valve body, a valve seat, a valve stem, a spool and a bonnet. A valve body center cavity is formed in the valve body; a valve seat gasket is arranged at the lower end of the valve body center cavity; the valve seat is mounted on the valve seat gasket; a micro flow guide valve cage is arranged at the upper end of the valve seat; the lower end of the bonnet is connected with the micro flow guide valve cage. A valve stem mounting hole is formed in the middle of the valve body vertically; the valve stem penetrates the valve stem mounting hole; the spool is arranged at the lower end of the valve stem integrally; the lower end of the spool is detachably provided with a spool seal ring. Besides, the micro flow guide valve cage is provided with an elongated slit, the valve stem drives the spool to move up and down, the spool drives the spool seal ring to move relative to the elongated slit, so that the flow area of the elongated slit is changed and flow change is achieved. According to the technical scheme, the micro flow regulating valve has the advantages of reasonable design, simple structure, good sealing performance, convenience in use, high safety and reliability and long service life; the spool thereof is not easy to damage.

The invention relates to a self-adaptive flow regulation cooling device with upper and lower partitions, and belongs to the technical field of shell-and-tube heat exchangers. The self-adaptive flow regulation cooling device comprises a shell-and-tube heat exchanger and a self-adaptive flow regulation unit, wherein the shell-and-tube heat exchanger is provided with a first fluid inlet for introducing a first fluid and a first fluid outlet for discharging the first fluid; a plurality of cooling chambers with upper and lower partitions are formed between the first fluid inlet and the first fluidoutlet; heat exchange tubes for circulating the first fluid are arranged in the plurality of cooling chambers; the self-adaptive flow regulation unit comprises an airfoil; the airfoil is located in the shell-and-tube heat exchanger; and the airfoil rotates in a self-adaptive mode under the acting force of the first fluid in the shell-and-tube heat exchanger so as to change the circulation area ofthe first fluid introduced into the plurality of cooling chambers. According to the self-adaptive flow regulation cooling device, cooling and temperature control over a plurality of users and a plurality of media can be achieved through the plurality of cooling chambers with upper and lower partitions, and space waste and redundant investment caused by independent arrangement of heat exchangers, pumps, pipeline accessories and the like for all the users are saved.

The invention discloses a shower. The shower comprises a handle, a flow adjusting mechanism and a shower head connected with the handle; the handle is provided with a water inlet; the shower head is provided with a water inflow opening and a connecting part used for being connected with the handle; the flow adjusting mechanism comprises a rotating shaft installed in the connecting part and a shifting ring assembly used for pulling the rotating shaft to move, the connecting part is sleeved with the shifting ring assembly, and the shifting ring assembly is provided with an adjusting rail; the rotating shaft is provided with a linkage piece matched with the adjusting rail, and the linkage piece penetrates through the connecting part and is inserted into the adjusting rail; and a water inflow channel communicated with the water inflow opening is arranged in the rotating shaft, and the rotating shaft is provided with an adjusting hole corresponding to the water inlet. By means of the shower, the flow can be adjusted, and smooth adjustment can be achieved in the using process.

The invention discloses a variable flow area suction nozzle applied to a road sweeper. The variable flow area suction nozzle comprises a suction nozzle body and a conveying pipe arranged on the suction nozzle body, as well as a front air baffle plate arranged at the front end of the suction nozzle body and a rear air baffle plate at the back end of the suction nozzle body, wherein air inlet passages are formed between the bottom ends of the front air baffle plate and the rear air baffle plate and road surface when the sweeper works; a suction inner cavity communicated with the conveying pipe is formed among the suction body, the front air baffle plate and the rear air baffle plate; a tongue plate arranged on the suction nozzle body is arranged in the suction nozzle inner cavity; and the tongue plate can swing when the sweeper works so that the cross-sectional flow area of the suction inner cavity is increased or reduced. By optimizing the flow field, the suction nozzle disclosed by the invention can guarantee relatively good adaptability of the road sweeper to dense garbage and light garbage on the ground, so that the adaptability of the road sweeper to the road garbage is enhanced, and the sweeping quality and working efficiency of the road sweeper are improved.