25results about How to "Increase ascent speed" patented technology

The invention discloses a control circuit of an electronic load, the electronic load and a power supply test system. The circuit comprises an MCU; the signal output end of the MCU is connected with the input end of the DAC module; the closed-loop control circuit comprises a first error amplifier, a mutual inductor, an MOS (Metal Oxide Semiconductor) tube, a current sampling resistor and a power supply end VBUS; a mutual inductor is arranged between a first error amplifier and an MOS tube of the closed-loop control circuit, a power supply end VBUS is connected with a drain electrode of the MOS tube through a primary side of the mutual inductor, a first secondary side of the mutual inductor feeds back an input signal of the first error amplifier, and a second secondary side of the mutual inductor feeds back a driving signal of the first error amplifier to the MOS tube. According to the invention, the dynamic response speed when the electronic load pulls the high-frequency current can be improved, and the test requirements of high precision and high dynamic response are met.

The invention provides a quick pilot response structure of a balance valve, belongs to the technical field of balance valves, and solves the problem of low response speed in the prior art. The variable damping valve comprises a main valve body and a pilot valve body, a pilot cavity is formed in the main valve body, a first step cavity is formed in the pilot valve body, a variable damping valve element is movably arranged in the first step cavity, an annular conical face is arranged on the variable damping valve element, a throttling groove is formed in the annular conical face, and the variable damping valve element is connected with a reset mechanism. The small-diameter end of the first step cavity is connected with a liquid inlet channel, the large-diameter end of the first step cavity is communicated with the pilot cavity through a hole channel, and a first damper is arranged in the variable damping valve element. After the pressure of the liquid inlet channel is larger than the pressure of the pilot cavity by a certain value, oil pushes the variable damping valve element to move, the oil enters the large-diameter end of the first step cavity through the throttling groove and then flows into the pilot cavity, the rising speed of the pressure of the pilot cavity in the opening stage of the balance valve can be increased, and the response speed of the balance valve is increased.

The utility model relates to a large typhoon-resistant deep sea aquaculture net cage which comprises a net cage floating body structure located under the water surface, and the net cage floating body structure is provided with at least one annular submerging and floating pipe. The upper-layer low-resistance net hanging structure is located above the net cage floating body structure, the upper-layer low-resistance net hanging structure is provided with a plurality of vertical rods which are integrally and annularly distributed at intervals, each vertical rod is provided with an upper end and a lower end, and the lower ends of the vertical rods are connected to the net cage floating body structure; the netting is integrally arranged in an internal space formed by the upper-layer net hanging structure and the net cage floating body structure, and the upper part of the netting is connected to the upper ends of the vertical rods of the upper-layer net hanging structure. According to the net cage floating body structure, at least one submerging and floating pipe forms a bearing structure to serve as a main body structure, the main body structure has the net cage submerging and floating functions at the same time, the main body structure is located at the bottom of the periphery of the net cage, and a plurality of vertical rods with enough strength are upwards used for hanging nettings. The impact pressure of stormy waves on the whole net cage is reduced, and seawater inside and outside the net cage efficiently exchanges.

The invention belongs to wastewater treatment equipment, and particularly relates to a multi-stage treatment device for industrial wastewater, which comprises a treatment pond, a rotating motor connected to a bracket at the upper end of the treatment pond, a rotating shaft at the lower end of the rotating motor extending to the lower end of the treatment pond, stirring blades arranged on the rotating shaft, a drain pipe arranged on one side of the treatment pond, and a vertical pipe arranged at the lower end of the treatment pond, a switch valve is arranged on the vertical pipe, a straight ladder is arranged on one side of the treatment tank, and the rotating shaft is sequentially provided with a stirring blade, a bubble type aerating assembly, a rotating blade assembly, a feeding mechanism, a drawing type aerating mechanism and a foam scraping assembly from bottom to top; according to the device, the stirring effect is improved, activated sludge is added through the feeding mechanism to be better combined with internal wastewater for reaction, the arranged bubble type air-entrapping assembly, a drawing type aeration mechanism and stirring blades are matched with an external air pump for aeration treatment, and a plurality of oxygen-entrapping devices are arranged, so that the wastewater is better contacted with oxygen, the wastewater treatment effect is improved, and the reaction time is shortened.

The invention discloses a casting device for a mine car balance suspension shaft shell, and belongs to the field of metal casting. Comprising a base, an X-axis moving part connected to one side of the base, a Z-axis moving part fixedly connected to one side of the moving end of the X-axis moving part, a tilting part fixedly connected to one side of the moving end of the Z-axis moving part, and a supporting frame fixedly connected to one side of the rotating end of the tilting part. The mounting plate is connected to one side of the base and is used for fixing a mold; the mold splitting and closing part is used for realizing mold closing and mold splitting; the first Venturi mixing part can mix inert gas and a degassing agent discharged from the first discharging pipe, the inert gas and the degassing agent are fed into the first porous spray head through a hollow pipeline, and the mixture is sprayed out of the first porous spray head at the bottom of a steel ladle so that the degassing agent can chemically react with gas (especially hydrogen) in molten metal. And dissolved gases such as hydrogen and nitrogen in molten metal are effectively removed, the metal quality is improved, the solubility of the gases is reduced, and the gases are separated out and discharged.

The utility model discloses a device for preventing temperature and humidity leakage of an incubator, which relates to the technical field of incubator accessory equipment and comprises a case, a fixed plate is fixedly arranged on one side in the case, a heater is fixedly arranged on one side in the fixed plate, the other side of the fixed plate is symmetrically communicated with air inlet pipes, and fans are rotatably arranged in the air inlet pipes; one end of the air inlet pipe communicates with the fixing frame, and a drawer is slidably arranged in the fixing frame. A flitch is hinged to the upper end face of the fixing frame, locking pieces are symmetrically and rotationally connected to the front of the flitch, embedded blocks are fixedly connected to the tail ends of the locking pieces, and embedded holes are formed in the positions, corresponding to the embedded blocks, of the lower end face of the fixing frame. A gasket is mounted at the joint of the air inlet pipe and the fixed frame; the air inlet pipes symmetrically communicate with the sides, away from the heaters, of the fixing plates. The flitch is hinged to the upper end face of the fixing frame and close to the drawer. The problems that an existing partial device used for improving the air tightness of the incubator is complex in structure and inconvenient to operate are solved.

This invention discloses a method for controlling the nitrogen content of molten steel in a converter with low iron consumption mode, belonging to the field of steel manufacturing technology. The method includes the following steps: controlling the molten iron inlet temperature to 1310-1330℃, controlling the silicon content in the molten iron to 0.30%-0.50%, controlling the molten iron charging ratio to 65-70%, and the scrap steel charging ratio to 30-35%; controlling the converter iron-to-steel ratio to 720-750 kg / t; after adding scrap steel into the furnace, shaking the furnace back and forth until the furnace mouth flame is normal, and baking the scrap steel; adding 50% of the slag in the first 4 minutes of the converter blowing process, and then adding the remaining slag in small amounts multiple times over 4-8 minutes, controlling the furnace temperature, and stirring the molten pool back and forth from high to low with an oxygen lance before the end point; using nitrogen-argon switching bottom blowing during the converter blowing process; adding ladle slag modifier before tapping, and then adding deoxidizer for alloying, while simultaneously performing ladle bottom blowing with argon. The control method of the present invention can control the nitrogen content of converter steel to within 40 ppm under the condition that the iron-to-steel ratio in the converter is as low as 720-750 kg / t.

The invention discloses a coastal facies soft soil stratum subway station precipitation excavation and deformation control construction method which comprises the following steps: carrying out three-shaft stirring pile reinforcement construction on two sides of a diaphragm wall construction position, and then constructing a diaphragm wall; a plurality of drainage deep wells are constructed in a soil layer of a foundation pit construction area, each drainage deep well is provided with a water pumping device and an air supply device, when dewatering construction is conducted on the tops of the drainage deep wells, the water pumping devices and the air supply devices work synchronously, the air supply devices supply air into drainage pipes, and the water pumping devices suck water in the drainage deep wells; the foundation pit excavation construction is carried out, a plurality of concrete supporting structures and a plurality of steel supporting structures are arranged on the inner wall of the foundation pit from top to bottom, and a servo system is arranged between the steel supporting structures and the inner wall of the diaphragm wall and used for monitoring the deformation condition of the inner wall of the foundation pit in real time and compensating and adjusting the axial force of the steel supporting structures in time according to the deformation condition. And deformation of the foundation pit is controlled. The rainfall effect and the foundation pit deformation control effect can be improved.

The invention relates to the technical field of tea processing equipment, and discloses efficient drying equipment for tea processing, which comprises a drying bin body, an air heater, a moisture exhaust machine, a drying frame, a drying disc and a sealing bin door, drying mechanisms are symmetrically arranged in the drying bin body, and each drying mechanism comprises an air supply hose; and the end, away from the hot-air blower, of the air supply hose fixedly communicates with a vertical air supply main pipe, horizontal air supply branch pipes uniformly and fixedly communicate with the exterior of the vertical air supply main pipe, air supply nozzles are uniformly arranged outside the horizontal air supply branch pipes, and overturning mechanisms are uniformly and symmetrically arranged in the drying bin body. According to the tea leaf drying device, the speed reduction motor is started to enable the vertical air supply main pipe to drive the air supply spray head to move in a reciprocating mode to evenly dry tea leaves laid in the drying disc, meanwhile, the turning rake A and the turning rake B can alternately and flexibly turn over the tea leaves, the tea leaves can be evenly and fully dried, and meanwhile broken tea can be reduced.

The utility model relates to a vibration evaporation concentration kettle which is a two-section type vibration stirring kettle with an evaporation chamber and a heating chamber separated. A main body comprises a kettle cover, an evaporation chamber barrel body, a connecting seal head, a heating chamber, a stirring blade, a stirring sealing piece, a vibration coupling, a vibration power motor and the like, wherein the diameter of the heating chamber is smaller than that of the evaporation chamber barrel body, and the heating chamber is provided with a jacket. And a basin-type paddle with vent holes distributed on the basin bottom is arranged in the heating chamber and is sealed by a fluoroplastic flooding plug sealing element. The device is suitable for evaporation and concentration of special materials sensitive to wall adhesion and rotation.

The present application discloses a method for constructing a super-high main tower of a cable-stayed bridge, which comprises the following steps: forming a tower column starting section by casting; then assembling climbing formwork structures on the outer peripheries of the two tower column starting sections respectively, the climbing formwork structures forming a casting cavity at the top of the tower column, setting a truss on the top of the two climbing formwork structures, forming a new lower tower column section by casting in the casting cavity, then lifting the truss, and the truss drives the two climbing formwork structures to move up to the construction position of the next section of the tower column, and then performing casting construction, and repeating the steps until the construction of the lower tower column is completed; then building a construction platform between the two lower tower columns, and completing the casting construction of the lower crossbeam on the tops of the two lower tower columns; repeating the above operations to complete the climbing formwork casting construction of the middle tower column and the casting construction of the middle crossbeam, and finally completing the climbing formwork casting construction of the upper tower column. The present application has the effect of reducing the adverse effects on the tower body during the construction process.

The invention discloses a fume hood with a waste gas treatment mechanism, and relates to the technical field of manufacturing of equipment special for atmospheric pollution and environmental protection, the fume hood comprises a fume hood body, an air outlet is formed in the top of the fume hood body, and the waste gas treatment mechanism is arranged in the air outlet. The multi-layer purification effect on the air is completed, and each layer of connecting pipe is provided with different liquids, so that when the waste gas passes through the different liquids, various different hydrophilic and oleophylic impurities in the waste gas can be naturally adsorbed by the different liquids, and the automatic separation effect on harmful substances in the waste gas is completed; meanwhile, the waste gas is discharged into the liquid more uniformly, the situation that the filtering and separating efficiency of impurities in the waste gas is unstable after the waste gas enters due to different saturations of all positions of the liquid in the connecting pipe is avoided, and all positions of the liquid are effectively utilized as much as possible to achieve the stable and efficient impurity separating effect.

The present invention relates to the technical field of book retrieval, and specifically discloses a campus book retrieval method based on Internet big data, wherein the method comprises the following steps: S1: calculating date difference and screening out new books; S2: setting time nodes at preset time intervals T within a time interval, obtaining interactive data of new books, and calculating the heat value of new books at each time node; S3: generating coordinate points, obtaining fitting curves, calculating average heat values, and marking new books whose average heat values ​​are greater than or equal to the average heat threshold as target books; S4: calculating the heat value variation coefficient of the target book, and calculating the target PR value through a formula. The present invention stipulates the screening criteria for the target book, and also has anti-interference ability, and realizes the amplification of the target PR value of the target book through the two factors of heat value and date difference, thereby solving the problem of slow increase of the target PR value.

This invention discloses a fluid flow drag-reducing electrolyzer, comprising an electrolyzer frame and two electrodes, two guide plates, and a diaphragm installed and tightly fitted together within the frame. The electrolyzer frame has an inlet at its bottom and an outlet at its top. The two electrodes are symmetrically distributed on both sides of the diaphragm; each electrode is flattened by rolling. The two guide plates are symmetrically distributed on both sides of the diaphragm and located outside the corresponding electrodes. Each guide plate has multiple guide grooves arranged radially along its diagonal and parallel lines near the corresponding electrode. By optimizing the electrode thickness and its internal fluid channel design, this invention reduces the flow resistance of the electrolyte in the electrode region, improves electrolyte renewal efficiency, and enhances the overall operating performance of the electrolyzer.

The utility model relates to an activated bauxite ore flotation device in the technical field of ore separation equipment, which comprises a flotation machine tank body, a stirring assembly and a scraper assembly, the stirring assembly comprises a stirring impeller, a stirring rotating shaft, a hollow air pipe, a stirring motor, a motor support and a motor fan cover, and the stirring impeller is arranged at the lower end of the stirring rotating shaft; an impeller protective cover covers the periphery of the stirring impeller, an air inlet is formed in the side wall of the motor support, an air inlet is formed in the top of the motor fan cover, the stirring rotating shaft is sleeved with the hollow air pipe, and an air outlet is formed in the side wall of the impeller protective cover; the scraper blade assembly comprises a scraper blade rotating shaft, a rotating scraper blade and a scraper blade motor; a concave notch is formed in the outer side edge of each rectangular blade of the stirring impeller; a plurality of layers of damping screen plates are laid in the flotation machine tank body; and a plurality of vertical guide vanes are annularly distributed on the periphery of the impeller shield. According to the flotation device, through the structural design of the stirring impeller, the rotating load of the stirring motor is reduced; the damping net plate reduces the rising speed of the bubbles, and the formed bubbles are finer and more uniform.

The present invention relates to the technical field of plate heat exchangers, and specifically to a symmetrical plate heat exchanger and a heat exchange method thereof, comprising: a plate heat exchanger body, on which a fluid inlet is arranged; a sleeve pipe connected to the plate heat exchanger body and coaxial with the sleeve pipe; a switching plate, sealingly and slidingly arranged between the sleeve pipe and the fluid inlet, on which two groups of filter plates are detachably mounted; a switching assembly connected to the switching plate, the switching assembly being capable of making one of the filter plates coaxial with the fluid inlet; a pneumatic drive assembly communicated with the sleeve pipe, on which an engaging wheel is rotatably mounted; a driving plate connected to the switching assembly, on which a guide groove is formed, the guide groove cooperates with the engaging wheel to drive the switching assembly to actuate when the pressure in the sleeve pipe increases, thereby preventing the fluid channel from being blocked.

The utility model relates to a bridge wet joint construction template hoisting tool, which belongs to the technical field of bridge construction tools and comprises a first wheel carrier, a second wheel carrier, a first rope winding machine, a second rope winding machine, a first hoisting rope and a second hoisting rope, the first hoisting rope and the second hoisting rope are arranged in parallel, and the first rope winding machine and the second rope winding machine are respectively fixed on the first wheel carrier and the second wheel carrier. One end of the first lifting rope is detachably connected to the first wheel carrier; one end of the second lifting rope is detachably connected to the second wheel frame, and the other end of the second lifting rope is fixed to the winding part of the first rope winding machine. And the wet joint template is arranged on the first lifting rope and the second lifting rope. The first wheel frame and the second wheel frame stretch across the two adjacent beam plates, then the other end of the first lifting rope is fixed to the winding part of the second rope winding machine, the other end of the second lifting rope is fixed to the winding part of the first rope winding machine, manpower can be reduced, the wet joint formwork can be stably lifted, the lifting speed of the wet joint formwork is increased, and the working efficiency is improved. The construction period is shortened, and the hoisting construction effect of the wet joint formwork is improved.

The utility model relates to the technical field of geological exploration, and provides a geological exploration terrestrial heat measuring device which comprises a main machine and a rear shell, and measuring structures used for detecting terrestrial heat are arranged on the main machine and the rear shell. The device is convenient to carry and use, the servo motor rotates reversely to drive the braided wire to descend, the measuring cylinder is put into a drilled temperature measuring hole, the camera at the lower end of the measuring cylinder shoots an image in the temperature measuring hole and transmits the image to the display screen of the host, and the acceleration switch provided with the Hall element can control the rotating speed of the servo motor. Temperature information can be observed on a display screen of the main machine when the measuring cylinder sinks into underground water, inertia generated when the servo motor drives the wire stranding wheel to rotate after shutdown can be counteracted by arranging bidirectional rotation damping, the main machine and the lifting driving assembly are powered by the first battery pack, and the measuring assembly is powered by the second battery pack. The second battery pack may be charged by the first battery pack.

This invention provides a method for one-time pouring of the dam overflow surface. The dam or overflow section is divided into a modified concrete zone, a first roller-compacted concrete zone, a second roller-compacted concrete zone, and an erosion-resistant and wear-resistant concrete zone, based on the upstream to downstream cross-section. Construction is carried out in the modified concrete zone, the first roller-compacted concrete zone, and the second roller-compacted concrete zone. After the second roller-compacted concrete is constructed, its right end slopes downwards to form a step on the surface overflow surface. Then, the erosion-resistant and wear-resistant concrete zone is poured in one go. The construction process of the erosion-resistant and wear-resistant concrete zone includes the following steps: S1, foundation treatment; S2, rebar tying; S3, formwork installation; S4, concrete pouring; S5, formwork removal; S6, concrete finishing; S7, concrete curing. This method for one-time pouring of the dam overflow surface improves the construction quality of the dam overflow surface by pouring the erosion-resistant and wear-resistant concrete in one go after the roller-compacted concrete construction is completed.

The utility model discloses a tensile testing technical field's thermoplastic material tensile detection device, including, shell, clamping component, temperature control assembly, motor and screw rod, be provided with baffle in the shell, divide the shell into upper chamber and lower chamber, clamping component sets up in the upper chamber for clamping thermoplastic material sample, motor sets up in the lower chamber for driving the rotation of screw rod, drives the movement of a part in clamping component, temperature control assembly is used for adjusting and maintaining the constant temperature inside the upper chamber, the utility model discloses adopt upper and lower clamping main body cooperation trapezoidal groove structure, and combine the linkage clamping mechanism of rotatable connecting plate and clamping block, through telescopic link control clamping block along the sliding of inclined plane, realize the adaptive clamping of sample, make clamping block have the same clamping force, through the replacement into the clamping block of same size with sample size, can effectively prevent the sample clamping slip or clamping break problem caused by uneven clamping force, improved the reliability and test repeatability of clamping.

The utility model discloses an intelligent temperature control cotton slipper. The intelligent temperature control cotton slipper comprises a sole and a vamp arranged on the upper surface of the sole. The sole comprises an upper layer, a middle layer and a lower layer; the upper layer is provided with a polar fleece insole, the lower layer is provided with an outsole with friction lines, and a heating device, a control module and a communication module are arranged in the middle layer; the communication module is electrically connected with the control module, and the control module is electrically connected with the heating device. According to the intelligent temperature control cotton slipper, the heating device is arranged on the sole, the heating device heats the foot, the rising speed of the temperature of the foot is increased, the risk that the foot sweats is reduced, meanwhile, the foot is heated and kept warm, and the warm keeping effect of the intelligent temperature control cotton slipper is improved.

The application provides a switch frequency determination method and device for an LCC resonant converter, the method comprising: obtaining an input voltage and an output voltage of the LCC resonant converter; determining a starting mode in which the LCC resonant converter is currently located by using the output voltage; determining a calculation program corresponding to the starting mode by using the starting mode in which the LCC resonant converter is currently located, wherein the calculation program is an operation logic program designed for the starting mode by using a field programmable logic gate array; inputting the input voltage and the output voltage into the field programmable logic gate array, and calculating the switch frequency of the LCC resonant converter by using the calculation program, so that the switch frequency determination method improves the adjustment rate of the switch frequency of the LCC resonant converter, the rising speed of the output voltage, and further improves the dynamic response speed of an existing power supply.

The utility model relates to wind power demonstration device technical field, concretely relates to a kind of range hood wind power demonstration device, including ground cabinet, stove installed on ground cabinet, smoke generating device for simulating oil fume installed on stove, vertical installation surface located at the back of ground cabinet, range hood installed on vertical installation surface;Smoke generating device includes: container assembly, including detachably installed on stove solution tray and the sealing cover covering its top;By integrated piezoelectric ceramic atomizing sheet and accurate metering liquid supply system, controllable smoke is stably generated, combined with venturi exhaust pipe group with tapering throat and 12 ° diffusion angle and fan, the directivity and rising speed of smoke are significantly improved;Twelve spouts of inner and outer double-ring distribution cooperate with adjustable air deflector, can high-fidelity simulate multi-source real oil fume diffusion form, intuitively and dynamically show the trapping efficiency and wind power distribution effect of range hood to different position oil fume.

The annular anchor comprises an annular cylinder and a lifting lug, the lifting lug is connected to the radial outer side of the annular cylinder and suitable for providing a connecting point for an anchor chain, the detaching and placing device comprises a suction cylinder, a suction cavity with an opening is defined in the suction cylinder, and the inner diameter of the suction cavity is larger than the outer diameter of the annular cylinder. An avoiding hole extending in the axial direction of the suction barrel is formed in the side wall of the suction barrel, the avoiding hole penetrates through the surface of one axial end of the suction barrel, and the lifting lug is suitable for being arranged in the avoiding hole in a penetrating mode; a through hole communicated with the suction cavity is formed in the top of the suction cylinder. According to the detaching and placing device, the sealing effect of the suction cavity can be improved, the change speed of the pressure intensity in the suction barrel is high, the lifting speed of the suction barrel is improved, the suction barrel can rapidly place the annular anchor into a seabed and rapidly pull the annular anchor out of the seabed, and the detaching and placing efficiency of the detaching and placing device is improved; and the reliability of the dismounting device is improved.

The utility model provides a cyclohexane dehydrogenation product crude benzene rectification separation device which comprises a bottom plate, a rectification tower is fixed on the bottom plate through a plurality of supporting legs, the bottom of the rectification tower is communicated with a liquid outlet pipe, the top of the rectification tower is communicated with a steam guide pipe, one side of the rectification tower is communicated with a liquid inlet pipe, and the liquid inlet pipe is communicated with a steam outlet pipe. A supporting ring seat is fixed in the rectifying tower, a separation cover is fixed on the supporting ring seat, the top of the separation cover is communicated with an air outlet pipe, a mounting frame is fixed at the bottom of the supporting ring seat, a rotating shaft is movably arranged on the mounting frame through a bearing, and a plurality of exhaust blades are fixed at the top of the rotating shaft in the circumferential direction; the utility model solves the problems that when the existing fractionating tower is used, the fractionating efficiency is influenced on one hand, the pressure in the tower is easily increased on the other hand, and the fractionating tower is not convenient to use because steam cannot be quickly discharged in the fractionating tower.