201results about How to "Reduce opening" patented technology

The invention discloses a natural gas supply device for an industrial furnace, which relates to the technical field of gas supply systems for industrial furnaces, and comprises an annular guide rail which is arranged at the side end of a gas inlet flow regulation and control valve pipe in a sleeving manner and is used for driving an adjusting shaft and an ultrasonic generator to be positioned at the side end of a gas inlet pipeline to carry out ultrasonic frequency emission regulation and control, under the cooperation of the oxygen-containing regulation and control assembly, the oxygen content proportion in the natural gas in the oxygen-containing conveying pipe is rapidly corrected, the precise oxygen content needed by combustion of the industrial furnace is guaranteed, super-uniform mixing of natural gas and oxygen is integrally achieved, the incomplete combustion phenomenon caused by fluctuation of the oxygen content is reduced, and the heating effect and the product quality are improved; and under the cooperation of the ultrasonic adjusting assembly, more complex pipeline impurity conditions can be treated, so that emission parameters and reflection angles of self-adaptive automatic adjustment ultrasonic waves are formed, natural gas conveying is smoother, and therefore the combustion stability and heat efficiency of the industrial furnace are improved.

The invention relates to the technical field of seawater desalination, and particularly provides an effect body evaporator, a low-temperature multi-effect distillation seawater desalination system and a low-temperature multi-effect distillation seawater desalination method. When the steam extraction circulating unit extracts steam, the opening degree of a flexible communicating hole in the double-flow-channel heat exchange pipe is gradually increased, so that most of steam entering the heat exchange pipe flows to an intermediate-effect evaporator through a main flow channel; and under the condition that the flow of the steam received by the first-effect evaporator is reduced, the flexible communication hole is gradually reduced, so that most of the steam entering the heat exchange pipe is subjected to heat exchange through the auxiliary flow channel under the action of the steam extraction pressure difference, and therefore, efficient utilization and heat energy recovery of the steam in the low-temperature multi-effect distillation seawater desalination system are realized, and the energy consumption is reduced. And meanwhile, scaling of the outer wall of the heat exchange tube of the first-effect evaporator due to the fact that the heat exchange tube bears the relatively unstable steam change condition can be effectively prevented, and scaling and cleaning difficulty of the first-effect heat exchange tube bundle are greatly reduced.

The invention provides a heating module, a drying module and clothes treating equipment, the heating module comprises a shell and a heating assembly, the shell is enclosed to form a containing space with an open end, the shell is provided with a protruding part, the protruding part is arranged on the surface of the shell in a protruding mode, and the protruding part is used for being assembled with an external element in an abutting mode; the heating assembly comprises a heater, and the heater is arranged in the containing space; and the structure and assembly of the whole heating module are simplified.

The utility model relates to a coating buffer tank which comprises a tank body and a feed liquid buffer structure, and the tank body is provided with a feed port and a feed liquid stirring cavity arranged in the tank body; the feed liquid temporary storage structure is arranged in the tank body, a feed liquid temporary storage space and at least one communicating hole used for keeping static pressure balance in the cavity are formed in the feed liquid temporary storage structure, the feed liquid temporary storage space is communicated with the feed inlet, and the at least one communicating hole is communicated with the feed liquid temporary storage space and the feed liquid stirring cavity; and the feed liquid which enters the feed liquid buffer space from the feed port is supplemented into the feed liquid stirring cavity. During feeding, feed liquid enters the feed liquid buffer space from the feed inlet, the feed liquid in the feed liquid buffer space is supplemented to the feed liquid stirring cavity through the communication hole at the time of stopping feeding, and the liquid level in the feed liquid buffer space is reduced slowly, so that the stability of the liquid level and the stability of static pressure in the feed liquid stirring cavity are ensured; meanwhile, the opening and closing frequency of the feeding electromagnetic valve and the feeding screw pump is reduced, and the stability of the feeding system is guaranteed.

The invention discloses an air pressure adjusting system and a substrate processing apparatus. The air pressure adjusting system is used for adjusting air pressure in different process cavities in the substrate processing device, and comprises an exhaust pipeline connected with the process cavities; the air exhaust regulating valve is arranged on the air exhaust pipeline; the barometer is arranged on the exhaust pipeline and is positioned between the process cavity and the exhaust regulating valve; and the control part is in communication connection with the air exhaust adjusting valve and the barometer and is configured to control the opening degree of the air exhaust adjusting valve so as to adjust the air exhaust rate of the air exhaust pipeline, so that the air pressure detection value of the barometer is equal to a first air pressure preset value, and the air pressure in the process cavity is equal to a second air pressure preset value. By means of the scheme, the problem that in existing substrate processing equipment, due to air pressure fluctuation of the main exhaust pipeline, the air pressure in the process cavity is unstable is solved.

The rear bumper with the rear reflex reflector comprises a decorative cover and the rear reflex reflector, the decorative cover is of a closed annular structure to form a decorative structure of an exhaust pipe, and the rear reflex reflector is preassembled in the annular interior of the decorative cover and connected with the decorative cover into an integrated structure. A single mounting hole is formed in a non-parting area on the rear bumper, and the periphery of the decorative cover is assembled and connected into the mounting hole. The rear reflex reflector and the decorative cover are integrally arranged, so that the number of parts needing to be arranged on the rear bumper is reduced, a vehicle tail is prevented from being disordered in appearance, meanwhile, the rear reflex reflector and the decorative cover can be mounted only by forming a single mounting hole in a non-parting area on the rear bumper, and the mounting efficiency is improved. And meanwhile, the rear reflex reflector and the decorative cover can be pre-assembled offline, so that the assembly efficiency of whole vehicle assembly on a production line is improved.

The invention belongs to the technical field of comprehensive utilization of geothermal energy and solar energy, and particularly discloses a medium-deep layer geothermal energy coupling solar heat supply regulation and control system which comprises a heat energy output assembly, a heat pump assembly and a heat pump assembly. The coupling heat storage assembly is used for coupling geothermal energy and solar energy, the user side is connected with the coupling heat storage assembly, and heat flowing into the client side meets the requirements of the user side by controlling the coupling heat storage assembly through a control device. Heat sources of geothermal well heat exchange equipment and solar heat collection equipment are coupled through the coupling heat storage assembly, the heat load of a user side is simulated through the control device, and the heat production amount, the coupling strategy and the pipeline selection strategy are regulated and controlled based on the total heat load amount, the heat use temperature and the regulation and control strategy of the heat use equipment of the user side. And the excessive production capacity is avoided to the greatest extent while the supply of the user side is ensured.

The invention relates to the technical field of rocket power tests, and discloses a liquid oxygen supply system and a liquid oxygen supply method.The liquid oxygen supply system is characterized in that a liquid oxygen storage tank is provided with an extrusion gas inlet and a liquid oxygen inlet and outlet; the gas extrusion subsystem extrudes liquid oxygen in the liquid oxygen storage tank; the liquid oxygen filling subsystem is used for filling liquid oxygen into a liquid oxygen storage tank; the main regulating valve is connected with the liquid oxygen inlet and outlet; the input ends of the plurality of parallel branches are connected with the main regulating valve, and the output ends of the plurality of branches provide liquid oxygen for test pieces at different stations respectively; a branch regulating valve is arranged on each branch; the flow and pressure of each branch are adjusted by adjusting the opening degree of the main adjusting valve and adjusting the opening degree of the branch adjusting valves. The flow of each branch is adjusted by adjusting the opening degree of the adjusting valve of each branch, so that the resistance of each branch is as close as possible, and the high-precision control of the flow and pressure of test pieces at different stations is achieved; and multi-path equal-pressure equal-flow liquid oxygen distribution is realized. And the main regulating valve is combined to regulate the total flow.

The invention discloses a cyanate ester synthesis catalytic reaction device and method, and belongs to the field of catalytic devices. The device comprises a reaction kettle and a weighing ring, a convex ring is arranged on the side wall of the reaction kettle, and the weighing ring is connected with the convex ring; a support is placed on the side portion of the reaction kettle, a metering cylinder and a first motor are connected to the support, an extraction pipe and a discharge pipe are connected to the metering cylinder, the discharge pipe is communicated with the reaction kettle, the extraction pipe is communicated with a catalyst supply position, a first sliding contact is arranged on a first sliding switch, and a limiting pressing rod is connected to the lower surface of a piston plate. A hole matched with the limiting pressing rod is formed in the support, and when the piston plate moves downwards, the limiting pressing rod moves downwards and pushes the first sliding contact to slide downwards to the first sliding switch, so that the rotating speed of the first motor is reduced; according to the device, when the weight of reactants is high, the rotating speed of the first motor is slowed down, so that the adding speed of a catalyst is reduced, and the situation that the reaction is too violent can be avoided.

In order to solve the problem that nitrogen trichloride is accumulated in the chlorine buffer tank, the chlorine buffer tank capable of preventing nitrogen trichloride from being accumulated comprises a buffer tank body, the upper end of the buffer tank body is connected with an air inlet pipe, an exhaust pipe and a pressure gauge, and the lower portion of the buffer tank body is connected with a blow-off pipe; the inner extending pipe is located on one side of the interior of the buffer tank body and is distributed in the vertical direction, and the upper end of the inner extending pipe is connected with the exhaust pipe; the inclined pipe and the inner extending pipe are arranged in an inclined mode, one end of the inclined pipe is connected with the inner extending pipe, and the other end of the inclined pipe is located over an inlet of the blow-off pipe; the liquid level meter is used for detecting the liquid level height in the buffer tank, chlorine is introduced to the position above the lowest point of the bottom of the chlorine buffer tank body through the inner extending pipe and the inclined pipe, the disturbance effect of the chlorine on liquid chlorine at the bottom of the buffer tank body is further improved through inclined arrangement of the inclined pipe, and therefore residual accumulation of the liquid chlorine is reduced; and the safety risk of nitrogen trichloride is reduced.

The present disclosure provides a side opening device for a vehicle, the side opening device being disposed on a functional component within the vehicle and comprising: a base adapted to be attached to the functional component; a cover attached to the base; the locking assembly is attached to the cover body and can be switched between a first position and a second position, in the first position, the locking assembly and the base are in a locking state, in the second position, the locking assembly and the base are in an unlocking state, and in response to the unlocking state of the locking assembly, the cover body pivots relative to the base and is in an opening state, the locking assembly is configured to move from the first position through a preset additional stroke to the second position. According to the side opening device, by providing the additional stroke for the locking assembly to move between the first position and the second position, scraping between the locking assembly and the base can be prevented in the opening and closing process of the cover body, the acting force for opening and closing the cover body is reduced, good appearance quality is provided, meanwhile, stability in the using process is guaranteed, and the service life of the side opening device is prolonged. And the use comfort is improved.

The present invention relates to the technical field of drilling impactors, and in particular to a pneumatic down-the-hole impactor, comprising a cylinder body, an impact piston and a drill body, and also comprising a spline sleeve attached to the end of the cylinder body, the drill body being matched with the spline sleeve in a manner of passing through the inside of the spline sleeve and forming a spline connection; the pneumatic down-the-hole impactor comprises a bottom-hole slag removal and purge air path, which comprises an internal drill air passage arranged on the drill body, and a transition air passage is formed by means of a spline gap at a spline connection between the drill body and the spline sleeve, so that there is no need or reduction in opening holes on the piston and / or cylinder body, thereby extremely ensuring the structural strength of the piston and / or cylinder body and improving the service life of the impactor as a whole. Moreover, since the transition air passage is formed by means of an existing structure, this also virtually reduces the processing difficulty and manufacturing cost.

The application provides a swept-back three-beam thin wing composite wing structure, which comprises a wing main body and an aileron installed in a wing main body mounting groove, the wing main body comprises a wing skeleton and a wing outer skin structure outside the wing skeleton; the wing skeleton comprises a longitudinal member unit and a transverse member unit, the longitudinal member unit comprises a front beam, a middle beam and a rear beam, the front beam and the middle beam and the middle beam and the rear beam are arranged at acute angles, the transverse member unit comprises a plurality of wing ribs arranged between the front beam and the middle beam, between the middle beam and the rear beam and on one side of the front beam towards the front of the fuselage; the front beam, the middle beam and the rear beam are all provided with a spar connecting head for connecting with the fuselage. The wing provided by the application adopts a three-beam structure, each wing beam has a mouth-shaped cross section, so that each wing beam forms a multi-wall form, can bear the bending moment and the torque brought by a large wing effective load, and the wing structure is light in weight, high in strength and good in integrity.

The utility model discloses a water swelling air pressure adjusting mechanism of a vacuum cup, which relates to the technical field of vacuum bottles and comprises a bottle body, a handle arranged on the outer wall of the left side of the bottle body, a bottle cap arranged on the bottle body, an opening, a mounting plate, a through hole, a sliding rod and a convex ball arranged in the bottle cap through a cavity, and a dustproof net arranged at an air outlet of the cavity. A fixing block and a clamping block are arranged on the outer wall of the right side of the bottle body, and a sliding plate and an insertion rod are arranged on the side wall of the bottle cap through the installation block. Under the action of the sliding rod and the convex ball, the convex ball cannot be driven by power equipment, and the convex ball is driven to move only by air pressure in the bottle body, so that the function of adjusting the air pressure in the bottle body is realized, the situation that a bottle cap cannot be opened due to inconsistent air pressure inside and outside the bottle body is reduced, and the use efficiency of the vacuum bottle is ensured; under the action of the clamping block and the inserting rod, the connecting quality of the bottle cap and the bottle body is guaranteed.

The application provides a control method and system of a throttling well killing manifold, the throttling well killing manifold is connected with a wellhead device, and comprises a rapid blowout channel and a common blowout channel which are arranged in parallel, and a throttle valve is installed on the common blowout channel; the control method comprises the following steps: real-time monitoring of wellhead casing pressure P a and standpipe pressure P1, and determining the pressure difference between the wellhead casing pressure and the standpipe pressure; when P a -P l <P z , the drilling operation is normal, and the throttling well killing manifold is not opened; when P z ≤P a -P1<aP z , the throttling well killing manifold is opened, and the opening degree of the throttle valve is dynamically adjusted according to a throttle valve opening degree processing model; when P a -P1≥aP z , or there is no drilling fluid to be recovered in the separator and the well is full of gas, the rapid blowout channel is opened, and blowout operation is implemented. In the process of implementing the blowout operation, the application adopts multi-channel control, and ensures the timeliness and safety of the blowout.

The present invention relates to an integral high-pressure and ultra-large flow hydraulic distributing valve, comprising a valve body, wherein a stepped groove is provided in the valve body, which is located at the same hole center and has a decreasing aperture from top to bottom, the bottom of the stepped groove is connected to the liquid inlet through hole, and the suction valve seat, suction valve core, extrusion valve seat, extrusion valve core and extrusion valve stopper that contact and cooperate with each other are arranged in sequence upward along the bottom of the stepped groove, and the extrusion valve stopper is connected to the liquid discharge through hole. The present invention has a compact and reasonable structure and is easy to operate. By adopting a flat valve structure, the lower part of the suction valve core has a parabolic structure, which is conducive to reducing valve port cavitation. The suction valve and the extrusion valve are both designed with a low-friction anti-rotation structure, which solves the problem of the valve core rotating when impacted by high-speed uneven fluid; the extrusion valve seat is provided with an oblique counter-impact structure, and the impact energy of the fluid is dissipated through the oblique counter-impact structure, thereby reducing the impact of the fluid on the valve core and enhancing the operating stability of the distributing valve.

The utility model discloses a microcentrifuge tube for a vacuum concentrator, which belongs to the technical field of microcentrifuge tubes and comprises a centrifuge tube body and a tube cover body sleeved at the top of the outer side wall of the centrifuge tube body, and a through hole penetrating through the tube cover body is arranged at the axis of the tube cover body. A through hole is formed in the pipe cover body, a plurality of limiting blocks and a plurality of limiting check blocks are arranged at the bottom of the pipe cover body, the limiting blocks and the limiting check blocks are distributed in an annular array mode and are all close to the through hole, and an on-off assembly is arranged between the limiting blocks and the limiting check blocks in a sliding mode and comprises a sliding block; the diameter of the sliding block is matched with the size of the through hole, and the position of the sliding block is restrained by the limiting block and the limiting check block. When the microcentrifuge tube for the vacuum concentrator is used, the sliding block can be positioned at different positions according to different stages of an experiment, and substances obtained after vacuum concentration can be isolated, so that the deterioration probability of the substances is reduced.

The utility model relates to the technical field of electromagnetic valves, and discloses an electromagnetic valve structure with a good water attack resisting effect, which comprises an electromagnetic valve component, a diaphragm component and an elastic hole pressing component. The diaphragm assembly is mounted on the electromagnetic valve assembly; a water inlet hole is formed in the membrane assembly; the elastic hole pressing assembly is arranged on the water inlet hole; the upper end of the elastic hole pressing assembly is connected with the electromagnetic valve assembly; the lower end of the elastic hole pressing assembly is pressed on the water inlet hole and can move up and down relative to the water inlet hole. When the electromagnetic valve structure with the good water attack resisting effect is opened, two forces are formed by the elastic hole pressing assembly and water inlet pressure to resist opposite impact, opening of the water inlet hole is slowed down, the opening degree of the water inlet hole is reduced to the minimum, and therefore the water inlet amount of the water inlet hole is small, and when the valve is closed, the water attack resisting effect is good. The elastic hole pressing assembly effectively relieves the water inlet pressure when the electromagnetic valve assembly is adjusted and controlled to close the valve, the instant impact of the water inlet pressure is better resisted, the effect of gentle and buffering valve closing is achieved, and then the phenomenon of water hammer (water hammer) is reduced.

The invention discloses fresh air heating equipment which comprises a box body, a cover plate, an air duct assembly and a control adjusting assembly. According to the fresh air heating equipment, the cover plate covers the air channel assembly in the box body, the air channel assembly is internally provided with the air flow channel, the air channel assembly divides the box body into the first air cavity and the second air cavity, and the first air cavity and the second air cavity intersect at one end of the air flow channel; the exhaust outlet and the ventilation opening communicate with the other end of the air flow channel, and the first air cavity communicates with the ventilation opening so that it can be guaranteed that fresh air is introduced. By controlling the adjusting assembly, the air flow channel is controlled to be selectively communicated with one of the ventilation opening and the exhaust opening, so that switching among a fresh air heating mode, an indoor air heating mode and an air exchange mode is achieved. According to the fresh air heating equipment, multiple working modes are provided, fresh air heating is achieved by introducing fresh air to be mixed with indoor air, and energy consumption is reduced while the air inlet amount is increased; the air exchange mode is adopted, the oxygen content concentration in the bathroom is improved, and then the comfort degree is improved.

A forward osmosis water-fertilizer integrated freshwater aquaculture wastewater treatment system and treatment method, belonging to the technical field of aquaculture wastewater treatment. This forward osmosis water-fertilizer integrated freshwater aquaculture wastewater treatment system includes a filtration unit, a compound fertilizer forward osmosis unit, a single fertilizer forward osmosis unit, a struvite crystallization separation unit and a regulating control unit. The system and treatment method use a forward osmosis process driven by a secondary fertilizer extraction liquid to treat freshwater aquaculture wastewater, eliminating the energy consumption of forward osmosis extraction liquid regeneration, and are suitable for the characteristics of large water volume and low pollutant concentration of freshwater aquaculture wastewater and the current situation of no heat source at freshwater aquaculture sites. Through the adjustable two-stage fertilizer extraction liquid forward osmosis process, the actual needs of both the clean water recovery rate of aquaculture wastewater and the water quality of the treated aquaculture wastewater meeting the standards are taken into account.

The invention discloses a crop irrigation short-term prediction method and system based on fuzzy control, and relates to the technical field of intelligent agriculture and irrigation control, and the method comprises the steps: collecting weather, multi-depth soil moisture content and field time sequence data of a crop growth stage, and obtaining irrigation feedback; processing the data, and inputting a time sequence prediction model to output water demand prediction values of one to three days and confidence obtained by mapping historical verification errors; fuzzifying the water demand predicted value, the real-time root zone moisture content and the growth stage index, performing weighted deduction and fuzzification based on a fuzzy rule base with a rule dynamic weight, and outputting planned irrigation duration or irrigation amount; and calculating the actual water consumption and updating the dynamic weight of the rule in the post-irrigation evaluation time window according to the water balance and the root zone soil moisture reserve variation. Through confidence risk suppression and post-irrigation closed-loop self-tuning, the stability of short-term prediction driving irrigation decision is improved, the over-irrigation and over-seepage risks are reduced, and the utilization efficiency of irrigation water is improved.

The invention discloses a perfume bottle cap and a manufacturing process thereof, and relates to the technical field of bottle caps, the perfume bottle cap comprises a cap body, a plugging piece is fixedly arranged on the inner side of the cap body, a guide groove is formed in the outer portion of the cap body, the outer wall of the cap body is movably sleeved with a movable ring, and the movable ring is in sliding fit with the inner wall of the guide groove; a limiting piece used for limiting the cover body is movably arranged on the outer wall of the cover body, and the limiting piece abuts against the inner wall of the movable ring. When an operator directly rotates the movable ring, the movable ring continuously rotates along the inner wall of the guide groove, so that the possibility that the cover body is opened due to the fact that the movable ring drives the cover body to rotate is reduced, and the possibility that the cover body is mistakenly opened by a child and perfume is wasted is reduced; when an operator loosens the movable ring, the movable ring is promoted to move downwards, and at the moment, the movable ring abuts against the limiting piece and pushes the limiting piece to move to abut against the perfume bottle, so that the possibility that the cover body is loosened is reduced, and the stability is better when the cover body is connected with the perfume bottle.

The invention relates to the technical field of petroleum and natural gas development, and in particular to a carbon dioxide fracturing sand mixing device for oil fields, which is connected to a wellhead device and then introduced with prepared fracturing fluid, and comprises a carbon dioxide storage tank, a proppant storage tank, and a plurality of mixing agitators arranged in parallel, wherein the input end of each group of mixing agitators is respectively connected with the carbon dioxide storage tank, the additive storage tank and the proppant storage tank; the mixing agitator comprises a shell; an infusion component is arranged on the upper part of the shell, and a stirring component is arranged on the lower part; the infusion component is connected with the carbon dioxide storage tank or a liquid output pipeline through an inlet pipe, the shell is connected with the output end of the proppant storage tank through a plurality of input ports arranged on the upper end, and the passage between the input port and the proppant storage tank is connected with a solid output pipeline; the invention can adjust the injection rate of liquid carbon dioxide and the mixing ratio of liquid carbon dioxide and proppant, and can also continuously prepare fracturing fluid, thereby improving the efficiency of fracturing operation.

The utility model relates to a cooling tower technical field especially is a kind of windbreak adjusting structure for cooling tower of thermal power plant, including windbreak mechanism and for, windbreak mechanism includes: main component, including the frame of being set in cooling tower air inlet;Execution component, including the vane component of being set in the inside of frame, vane component one end is provided with support rod, and the side of frame is provided with connecting rod, and connecting rod and support rod are hinged;Driving assembly, set in the side of frame and for controlling vane component rotation;The vane component includes the equal interval distribution of several louvers that are rotatably installed in the inside of frame, and the recess is set in the bottom of front end and the top of rear end of louvers, and sealing strip is fixed in recess;Through hand wheel drive worm gear mechanism linkage control louvers synchronous opening and closing, realize air intake accurate regulation, improve cooling efficiency and prevent icing;When closing, sealing strip and fender form double seal, ensure excellent air tightness, adapt to different working condition demand.

The utility model discloses a hot air circulation air cooler for a CCUS supercritical carbon dioxide compressor. The device comprises a framework, and a pipe bundle and a fan are arranged on the framework; a hot air circulation channel is arranged from the air outlet side of the tube bundle to the air inlet side of the fan; an electric air outlet device is arranged on the air outlet side of the tube bundle; an electric air inlet device is arranged on the air inlet side of the fan; an electric air return device is arranged at an air return inlet of the hot air circulation channel; a temperature sensor is arranged on the air inlet side of the tube bundle; a control device is further included. According to the hot air circulation air cooler for the CCUS supercritical carbon dioxide compressor, the temperature of supercritical carbon dioxide can be accurately controlled to be above the critical temperature, the carbon dioxide exists in a supercritical gas phase mode, the situation that equipment is corroded due to the fact that the supercritical carbon dioxide exists in a supercritical liquid phase state can be avoided, and the service life of the equipment is prolonged. And meanwhile, the influence of pulsation characteristic fluctuation on stable operation of the compressor is avoided, and the compressor can operate safely and stably.

The invention discloses a control method, device and equipment of a rod mill feeding system and a medium, and belongs to the technical field of metallurgy. The feeding system of the rod mill comprises a fan-shaped valve, the fan-shaped valve is used for adjusting the feeding amount of the rod mill, and the method comprises the steps that the actual feeding amount and the target feeding amount of the rod mill are obtained; if the difference value obtained by subtracting the target feeding amount from the actual feeding amount is larger than a preset first difference value threshold value, the fan-shaped valve is controlled to execute the closing action of a preset first duration; if the difference value is smaller than a preset second difference value threshold value, the fan-shaped valve is controlled to execute the opening action of a preset second duration; wherein the first difference threshold value is larger than 0, and the second difference threshold value is smaller than 0. According to the method, the opening degree of the fan-shaped valve can be finely adjusted every time, the precision of adjustment every time is guaranteed, then the final deviation is small or even zero, and the rod mill can be kept in an efficient working state.

The utility model relates to the technical field of fuel gas adjustment, in particular to an electrical fuel gas adjusting mechanism. According to the technical scheme, a valve body is included, an air inlet pipe is welded to the position, close to the lower surface, of one side of the outer surface of the valve body, a flowmeter is fixedly connected to the tail end of the air inlet pipe, and an air outlet pipe is welded to the position, close to the upper surface, of the side, away from the air inlet pipe, of the outer surface of the valve body; a through hole is formed in the axis position of the upper surface of the cover plate, a valve rod is movably inserted into the through hole, the two ends of the valve rod are fixedly connected with a rack and a conical valve element respectively, and a housing is fixedly installed on the upper surface of the cover plate. According to the utility model, the flow rate of the used gas can be automatically adjusted according to the instantaneous flow rate of the supplied gas in the gas pipeline, the fluctuation of the used gas flow rate caused by the fluctuation of the gas pressure in the gas pipeline is avoided, the stable supply of the used gas flow rate is ensured, and the energy consumption is saved.

The application discloses a control method of an electronic expansion valve of an air conditioner, and the control method comprises the following steps: obtaining the indoor environment temperature of the air conditioner during the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating process; and reducing the opening degree of the electronic expansion valve of the outdoor unit of the air conditioner according to the difference between the user-set temperature and the indoor environment temperature. The application further discloses a control device of the electronic expansion valve of the air conditioner, an air conditioner and a computer storage medium. According to the difference between the user-set temperature and the indoor environment temperature, the opening degree of the electronic expansion valve of the outdoor unit is reduced when the air conditioner is in the low-temperature heating process, so that the evaporation temperature of the outdoor unit is reduced, the heating capacity of the indoor unit is improved, the indoor temperature is raised faster, and the indoor heating effect is improved.

This invention discloses a high-mobility spin field-effect transistor (SFET), comprising a source electrode, a drain electrode, a gate electrode, a semiconductor channel, and a substrate. Compared to existing SFETs based on a single semiconductor channel, this semiconductor channel structure offers advantages such as tunable band structure, high mobility, tunable carrier concentration and type, and long spin diffusion length. Compared to traditional substrate-based SFETs, this invention introduces a substrate with piezoelectric properties, allowing for the modulation of carrier spin transport within the semiconductor channel through the surface polarization electric field of the substrate. This effectively reduces the turn-on or turn-off voltage and improves gate control. Compared to existing SFET fabrication processes, this invention optimizes the crystal quality of the spin tunneling layer, increases carrier spin polarization, thereby improving the device's on / off ratio and reducing operating current.