216results about How to "Large displacement" patented technology

The invention relates to the technical field of mechanical transmission, and provides a connecting rod transmission mechanism and a mirror image engine. The connecting rod transmission mechanism comprises a power sliding block, a power connecting rod and two power pistons, the power connecting rod comprises a connecting rod base body and two linear rod parts, the linear rod parts extend in the first direction, the front end of each linear rod part is connected with one power piston, and the rear end of each linear rod part is fixedly connected with the connecting rod base body; the two linear rod parts are located on the two opposite sides of the connecting rod base body in the first direction, and the power sliding block is installed on the connecting rod base body in a sliding mode in the second direction. The linear rod part does not need to contain a bearing, rotation motion does not exist, the overall cross section is uniform or roughly uniform, standard sinusoidal motion / cosine motion is met, the size reduction design of the linear rod part and the air cylinder is facilitated, the compression ratio in the air cylinder is increased, the combustion efficiency is improved, the overall structure of the engine is more compact, and the needed engine cabin space is reduced. And the power-to-weight ratio and the acceleration performance of the vehicle can be improved.

The invention discloses a pyrenyl Schiff base fluorescent derivative, a fluorescent probe, a preparation method of the pyrenyl Schiff base fluorescent derivative and application of the pyrenyl Schiff base fluorescent probe in biological imaging, and belongs to the technical field of fluorescent probes. The pyrenyl Schiff base fluorescent probe capable of specifically detecting the zinc ions is prepared through two-step chemical reaction of Suzuki coupling reaction and aldehyde amine condensation reaction, and the pyrenyl Schiff base fluorescent probe has good recoverability and low cytotoxicity, is high in practicability and low in cost, and can be applied to detection of the zinc ions. In addition, the sensor has excellent ion selectivity to zinc ions, extremely high sensitivity, good Stokes displacement and visual sensing performance, and detection of exogenous zinc ions and endogenous zinc ions in cells and tissues is realized through biological imaging. The problems of difficult synthesis process, slow response speed, high detection cost, non-ideal biological imaging effect and the like of the conventional fluorescent derivative are solved.

The invention discloses a self-adaptive railway tunnel pulverized coal cleaning filter screen replacement device, which relates to the technical field of filter screen replacement, and comprises a cleaning box, an automatic replacement mechanism, a filter screen replacement mechanism and a control system, the device is used for self-adaptively triggering the replacement process in the pulverized coal cleaning process and automatically overturning and replacing a screen plate, through arrangement of an automatic replacement mechanism and mutual cooperation of a special-shaped groove and an S-shaped rotating plate, a new filter screen body and an old filter screen body are replaced, accurate positioning is achieved through a mother magnet ring and a son magnet ring, and the replacement efficiency is improved. A U-shaped groove in the special-shaped groove extrudes a convex block of a convex block rotating disc, the convex block rotating disc and a rotating rod can be driven to rotate by a half circle, so that an S-shaped rotating plate rotates by a half circle, a servo motor is turned off in the rotating process, the convex block rotating disc is prevented from generating displacement due to rotation inertia, and the replacement accuracy can be further improved; therefore, the replacement accuracy and speed are ensured while the cost is reduced.

According to the air cylinder, an air cylinder body is provided with an installation channel and an air supplementing hole, the two ends of the installation channel are communicated with a compression cavity and the outer portion of the air cylinder body respectively, one end of the air supplementing hole is communicated with the compression cavity, the air supplementing hole is further communicated with the installation channel, and an enthalpy increasing pin is arranged in the installation channel. The enthalpy-increasing pin can enable the air supplementing hole to be communicated with a part of the mounting channel on the side, back to the compression cavity, of the enthalpy-increasing pin under the pressure difference effect of the two ends of the enthalpy-increasing pin. According to the air conditioner, when the high-pressure pipeline in the air conditioner is connected into the mounting channel of the air cylinder body, if the pressure of a refrigerant in the high-pressure pipeline is larger than that of a refrigerant in the compression cavity of the air cylinder body, the enthalpy increasing pin is located at the conducting position under the pressure difference effect, the refrigerant in the high-pressure pipeline can be supplemented into the compression cavity, and the amount of the refrigerant in the compression cavity is increased; and therefore, efficient enthalpy increase and stable operation of the compressor under the extreme working conditions of low-temperature heating or high-temperature refrigeration are achieved.

The invention discloses a TLP tension tendon supporting device and a tension leg platform, the TLP tension tendon supporting device comprises an assembly locking mechanism, a split structure and a mooring anchoring mechanism which are sequentially connected from top to bottom, the split structure comprises a top deck, an outer bulkhead, a first bulkhead, a bottom deck and a central pipe, and the top deck, the bottom deck and the outer bulkhead define a shell; the center pipe is arranged in the middle of the split structure in the middle, and the multiple first bulkheads are distributed between the outer bulkhead and the center pipe in the radial direction of the center pipe. The mooring anchoring mechanism comprises a top universal joint shackle, a top anchor chain section, a mooring rope, a bottom anchor chain section, a bottom shackle and a seabed anchor pile which are sequentially connected from top to bottom. The tension tendon system can be prevented from being directly installed on the floating body foundation, the design and construction of the fan floating body are not affected by the tension tendon, the displacement of the floating body can be increased, the size of the floating body can be reduced, on one hand, the heaving damping of the floating body is increased, the heaving motion response is reduced, and on the other hand, the construction, installation, operation and maintenance cost of the floating body is reduced.

The pump body structure comprises a flange assembly, an air cylinder, a crankshaft and a plurality of sliding pieces, the flange assembly is provided with two or more air suction ports and two or more air exhaust ports, the air cylinder is provided with a hollow cavity, the hollow cavity is communicated with the air suction ports and the air exhaust ports through air paths, and the hollow cavity is in an oval shape; the crankshaft is rotationally mounted in the hollow cavity and provided with a plurality of sliding grooves, and the sliding grooves are spirally distributed along the axis of the crankshaft; the multiple sliding pieces are movably arranged in the sliding grooves respectively, and the hollow cavity is divided into multiple independent sealed cavities through the multiple sliding pieces. Every time the crankshaft finishes one cycle of operation, each sealing cavity independently performs at least two times of air suction, compression and exhaust actions during operation, the operation efficiency of the compressor is remarkably improved, the hollow cavity of the air cylinder is oval, the displacement of the compressor is larger under the condition of the same rotor outer diameter, and due to the fact that the eccentric design is omitted, the service life of the compressor is prolonged. The influence of eccentric force on a shaft system is reduced, and the service life of the compressor is prolonged.

The invention discloses an anti-blocking flood prevention emergency drainage device, and relates to the technical field of emergency drainage. The device comprises a partition plate, the partition plate is fixedly connected with the inner side face of a box body, communicating grooves are symmetrically formed in the surface of the partition plate, the surface of a coarse screening assembly is fixedly connected with the inner side face of a cover plate, and a smashing assembly is fixedly connected with the inner side face of the box body and arranged on the side, away from the coarse screening assembly, of the partition plate; the coarse screening assembly can screen out large-size impurities, large-size hard impurities such as stones and branches are prevented from entering the box body, the situation that the crushing assembly is damaged by the hard large-size impurities is avoided, a partition plate with a communicating groove is arranged, the situation that the impurities are rushed into the device to cause blockage in rainstorm is avoided, the partition plate divides an inner cavity of the box body, and the inner cavity of the box body is blocked. The drainage system can prevent firm impurities from being flushed into the drainage system by rainstorm during rainstorm, so that the drainage system is prevented from being blocked, and the drainage system is ensured not to collapse during emergency drainage.

The utility model discloses a copper plate buckle connection structure of an integrated busbar of a new energy battery pack, which comprises a busbar framework, the busbar framework is provided with at least two wire harness arrangement grooves, and a plurality of copper plates are arranged on the side parts of the wire harness arrangement grooves side by side. A buckle connecting unit is arranged at the position, corresponding to the copper plate, of the side portion of the wire harness arrangement groove, the buckle connecting unit comprises a buckle base plate and limiting plates arranged on the two sides of the upper portion of the buckle base plate, and the copper plate is transversely clamped into a gap between the buckle base plate and the limiting plates. The clamping holes in the copper plate are connected with the buckle base plates in a clamping mode, and a supporting base plate located on the lower side of the copper plate is arranged on the side portion of the wire harness arrangement groove. According to the utility model, various problems of the existing integrated busbar and copper plate matching and fixing structure can be solved.

The invention discloses an AIE fluorescence immunochromatography test strip for detecting a toxoplasma gondii antibody as well as a preparation method and application of the AIE fluorescence immunochromatography test strip, and belongs to the technical field of production of veterinary biological diagnosis products. The test strip provided by the invention comprises a bottom plate, a sample pad, a combination pad, a nitrocellulose membrane and a water absorption pad, wherein the sample pad, the combination pad, the nitrocellulose membrane and the water absorption pad are bonded on the bottom plate in an end-to-end connection manner; the combination pad is coated with AIE microsphere labeled protein; the nitrocellulose membrane contains a detection line T and a quality control line C; the test strip prepared by adopting a double-antigen sandwich antibody detection method can be used for detecting serum antibodies in animal bodies such as pigs, cats and the like. Compared with a colloidal gold test strip on the market, the colloidal gold test strip has the advantages that the sensitivity is improved by 32 times, the batch-to-batch difference is less than 5%, the test performed by adopting 40 parts of pig serum and 30 parts of cat serum shows that the specificity, the stability and the accuracy are excellent, the operation is simple, the cost is low, and an accurate result can be obtained only in 10 minutes; and a rapid and effective detection method is provided for epidemiological investigation and disease diagnosis.

The invention discloses an inertial rotary piezoelectric motor based on a piezoelectric driving unit and a control method, and belongs to the technical field of piezoelectric driving. The piezoelectric driving unit and a rotary unit are rotatably arranged on a fixed base, a friction plate is arranged at the front end of the piezoelectric driving unit, and a pre-tightening force structure is fixed on the fixed base; the two piezoelectric driving units are arranged on the two sides of the rotating unit respectively, the two sets of identical piezoelectric driving units are adopted, alternate and coordinated movement of the two sets of piezoelectric driving units is controlled by regulating and controlling excitation voltage applied to the piezoelectric driving units, and then the rotating unit is pushed to move. Due to the alternate coordinated movement of the two groups of piezoelectric driving units, the output speed and the loading capacity of the piezoelectric motor are greatly improved, and the displacement hysteresis of single-step stepping of the inertial piezoelectric motor is greatly reduced. Therefore, the output performance of the rotor is improved, the load of the rotor is greatly improved compared with that of a single-path driving motor, and the consistency of forward and reverse movement of the rotor is also improved due to the symmetrical design.

The invention relates to the field of municipal engineering construction, in particular to gas pipeline construction equipment for municipal engineering. Comprising a conveying mechanism, a supporting and fixing mechanism and a groove cutting mechanism, the supporting and fixing mechanism and the groove cutting mechanism are sequentially arranged in the conveying direction of the conveying mechanism, the groove cutting mechanism comprises a fixed ring, a rotating ring and cutters, the rotating ring is coaxially and rotatably arranged on the fixed ring, and the cutters are evenly distributed on the rotating ring in the circumferential direction of the rotating ring. Each cutter can move in the radial direction of the cutter, the extrusion ring can move in the axis direction of the extrusion ring, a plurality of supporting pieces capable of moving in the radial direction are evenly distributed on the inner side of the extrusion ring in the circumferential direction of the extrusion ring, and an inner supporting driver is arranged on the extrusion ring. The rubber layer on the extrusion ring is elastically attached to the end face of the gas pipeline removal end, a uniform limiting contact face is formed, the stability of axial limiting is improved, the gas pipeline is internally supported through cooperation with the multiple supporting rollers, and the stability of radial limiting is improved.

The utility model discloses a nursing tray for medical nursing, which comprises a main tray body, an isolation ring is fixedly arranged in the middle of the main tray body, isolation plates are uniformly distributed between the main tray body and the isolation ring, a plurality of placing areas are formed among the isolation plates, a first sealing plate is movably arranged on the outer wall of the isolation ring, and a second sealing plate is arranged on the outer wall of the first sealing plate. According to the medical nursing device, the isolation plates are arranged, nursing materials and medical instruments which need to be used for nursing can be placed in a distinguished mode through the placing areas between the isolation plates, and the first sealing plate can conduct dustproof protection and sealing protection on part of the placing areas; the multifunctional nursing bed can be used for placing nursing materials and medical instruments with high protection requirements, and has the characteristics of strong practicability and good safety.

The utility model belongs to the field of electric reactors, and relates to an electric reactor iron core column limiting device which comprises an insulating plate and a matched fastening piece, the insulating plate is semicircular, a semicircular arc-shaped groove is formed in the circle center position of the insulating plate, and the insulating plate covers a lower clamping piece limb plate through hole in a lower clamping piece limb plate. The inner diameter of the semi-arc-shaped groove of the insulating plate is matched with the outer diameter of the iron core column, the two sides of the semi-arc-shaped groove are chamfered, a screw hole is formed in the position, corresponding to the through hole of the limb plate of the lower clamping piece, of the insulating plate, and the matched fastening piece comprises a bolt, a first nut, a second nut and a third nut. The bolt penetrates through a lower clamping piece limb plate through hole in the lower clamping piece limb plate and a screw hole in the insulating plate, the first nut and the second nut are arranged on the bolt in a sleeving mode and located on the two sides of the insulating plate, and the third nut is arranged on the bolt in a sleeving mode and located above the lower clamping piece limb plate. According to the utility model, overlarge displacement during installation of the iron core column can be prevented, and the problem of eccentricity caused by slipping after contact between the iron core column and the adhesive is solved.

The utility model discloses a lighter fuel adding device which comprises a base, a lifting component fixedly connected to the top of the base and a gas tank installed on the surface of the lifting component, a lighter body is arranged at the top of the base, and positioning structures located on the two sides of the lighter body are arranged at the top of the base. The transmission structure extrudes the swing rod, the swing rod swings with the pin shaft in the connecting block as the axis, when the positioning frame at the top end of the swing rod is arranged on the surface of the lighter body in a sleeving mode, the effect of extruding and positioning the lighter body is achieved, the lifting component drives the gas tank to descend, and inflation operation is conducted when the gas tank is communicated with the lighter body. The lighter body is extruded and fixed through the two structures with the fixed moving distance, the phenomenon that the lighter body slightly displaces when affected by vibration can be prevented, the lighter can be connected with the thin gas tank exhaust end in an aligned mode in the gas filling process, and the gas filling effect is guaranteed.

This invention provides a carbon dioxide recovery cascade refrigeration system, including a circulation loop and a first heat exchanger, a compressor, a condenser, and a first oil drain pipe disposed on the circulation loop. The circulation loop is used for the flow of carbon dioxide heat exchange medium. The first heat exchanger has independent first and second heat exchange channels. The first heat exchange channel has a first inlet and a first outlet. The second heat exchange channel has a second inlet and a second outlet respectively connected to the circulation loop. The carbon dioxide heat exchange medium in the second heat exchange channel is used to reduce the temperature of the medium in the first heat exchange channel. An oil drain port is provided at the bottom of the first heat exchange channel. The gas inlet of the compressor is connected to the second outlet of the first heat exchanger. The condenser is located downstream of the compressor and is used to condense the carbon dioxide heat exchange medium after compression by the compressor. The oil drain port is connected to the inlet of the compressor through the first oil drain pipe. This system uses carbon dioxide as the heat exchange medium, resulting in low cost.

This invention discloses a method for preparing and detecting a fluorescent probe for detecting changes in mitochondrial viscosity in organisms, belonging to the field of chemical analysis and detection technology. Triphenylbromoethylene and a five-membered heteroaromatic compound containing aldehyde and boric acid groups are dissolved and reacted with a catalyst; isopropanol is removed by cooling and vacuum evaporation, followed by water extraction, solvent removal, and column chromatography to obtain ND-SF-1; ND-SF-1 is mixed with 4-pyridineacetonitrile, anhydrous ethanol is added, piperidine is added dropwise, the mixture is heated, cooled, and refluxed, then cooled to room temperature, and the precipitated solid is washed to obtain ND-SF-2; ND-SF-2, 3-bromopropyltrimethylammonium bromide, and potassium iodide are mixed and added with acetonitrile, heated, and then cooled to room temperature, and the precipitated solid is collected and washed to obtain ND-SF-3; ND-SF-3 and potassium hexafluorophosphate are mixed and added with acetonitrile, heated, and then cooled to room temperature, and the solid is collected and washed to obtain the fluorescent probe. The fluorescent probe provided by this invention is simple to prepare, low in cost, highly sensitive, selective, and biocompatible; it can sensitively detect changes in mitochondrial viscosity in organisms.

The invention provides an MEMS gyroscope, the MEMS gyroscope comprises a substrate, a device layer, a driving structure, a driving electrode structure, a detection structure, a detection beam and a detection electrode unit, the device layer is fixed on the substrate and comprises a plurality of structure units which are mutually connected and arranged in an array; the driving structure is located in the structure unit and comprises a mass body, a driving frame, an elastic beam, a first folding beam, a first combination beam, a second combination beam and a third combination beam. The driving electrode structure is located in the structural unit and comprises a first capacitor, a second capacitor and a third capacitor; the detection structure is located in the structural unit and comprises a detection frame and a movable electrode frame; the detection beam is located in the structural unit and connected with the movable electrode frame, and the cross endpoint is connected with the mass body; the plurality of detection electrode units are located in the internal area of the detection frame and comprise a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor which are arranged in an array. According to the MEMS gyroscope disclosed by the invention, the mechanical sensitivity is improved.

The utility model relates to an umbrella technical field provides an umbrella rod structure and umbrella, umbrella rod structure includes a plurality of umbrella tubes that suit connection in proper order, sets up the top on the most outside umbrella tube's upper nest, the lower nest of sliding setting on the most outside umbrella tube and the umbrella handle of setting on the most inside umbrella tube bottom, the inside setting of umbrella handle has the rope winder, and the rope winder is provided with the umbrella collecting pull cord between the lower nest, the push rod is provided with on the intermediate umbrella tube, at least one fixed pulley is provided with on the pipe plug of the most inside umbrella tube, and one end of push rod pull cord is coiled in the rope winder, and the other end is connected to push rod after passing through fixed pulley, the pipe plug of intermediate umbrella tube is provided with first middle pipe pulley, and one end of outer tube pull cord is connected the most inside umbrella tube, and the other end is connected to the most outside umbrella tube after passing through first middle pipe pulley, the first upper nest pulley is provided with on the upper nest, and one end of umbrella opening pull cord is connected the most inside umbrella tube, and the other end is connected to the lower nest after passing through first upper nest pulley. Can make the extension and contraction of umbrella tube with the umbrella surface synchronous, improves the convenience.

The utility model provides a well lid for municipal road drainage. The well lid for municipal road drainage comprises a well lid body, a plurality of drainage holes evenly distributed around the axis are formed in the surface of the well lid body, vertical pipes are arranged in the drainage holes, the tops and the bottoms of the vertical pipes are each of an opening structure, and a plurality of drainage openings are formed in the surface of the side wall of each vertical pipe; a vertical strip is fixedly connected to the surface of the side wall of the vertical pipe, a groove is formed in the side wall of the drainage hole, the vertical strip is in sliding connection with the groove, a check block is welded to the surface of the side wall of the vertical pipe located on the lower side of the vertical strip, the size of the check block is larger than that of the groove, and a base is arranged on the lower side of the well lid. The well lid for municipal road drainage has the advantages that the well lid is durable in structure, the drainage amount of the well lid can be conveniently adjusted, and meanwhile warning can be given when the well lid is disengaged.

The utility model provides a layering oil well pump which comprises a first oil pumping unit, and the first oil pumping unit comprises a first pump cylinder and a second pump cylinder which are spaced, a first oil pumping mechanism arranged between the first pump cylinder and the second pump cylinder and used for being connected with an upper oil layer, and a first plunger concentrically arranged in the first pump cylinder. The second oil pumping unit comprises a third pump cylinder arranged on the downstream of the second pump cylinder, a second plunger concentrically arranged in the third pump cylinder and connected with the sucker rod, and a third pump cylinder arranged on the downstream of the second pump cylinder and connected with the second plunger. And the second oil pumping mechanism is arranged in the third pump cylinder and is used for being connected with a lower oil layer.

The invention provides a vibration measuring device with electricity waste estimation and quantitative emission reduction functions and a method for measuring vibration to estimate electricity waste and quantitative emission reduction. The device comprises a microprocessor and a vibration meter. The vibration meter measures vibration of a motor device to obtain a vibration value and transmits the vibration value to the microprocessor; the microprocessor calculates a plurality of vibration values to obtain a vibration root-mean-square value and calculates the vibration values to obtain a frequency domain distribution value; the microprocessor obtains a health index by using the vibration root-mean-square value; the microprocessor obtains an electricity waste percentage value by using the frequency domain distribution value and the health index; the microprocessor obtains an increased carbon emission value by using a power value of the motor device, the power waste percentage value and a power carbon emission coefficient.

The utility model provides a bridge drainage line structure belongs to bridge drainage technical field. Including bridge body, the surface one side of bridge body is equipped with the water outlet, and the inboard and below of water outlet are installed with drainage stability mechanism, the drainage stability mechanism includes the water collector pipe end and the pipe clamp frame, and the upper end inboard of water collector pipe end is fixed with the embedded block. The utility model discloses through setting up drainage stability mechanism, and the both ends of water collector pipe end form integral fixed connection between water outlet and first drain pipe respectively, and the three are a whole, when water is discharged from the highest point to the downward, just can not infiltrate to the structural layer of bridge itself, and under the fixed flow guide condition of having first drain pipe, can not appear the phenomenon of leakage and splashing in the drainage process, wherein the first drain pipe and second drain pipe junction install sealing assembly and installation assembly, and the first sealing pad is embedded in the inside of the blocking frame of its connection and is installed in the middle part of the carrying frame, and the second sealing pad is fixed in the end of first drain pipe.

The utility model belongs to the technical field of BIPV (building integrated photovoltaics), and provides a BIPV waterproof system convenient to install, which comprises a plurality of support rods arranged on a roof at equal intervals. The multiple main water tanks are fixedly connected to the multiple supporting rods at equal intervals, the tops of the two opposite side walls of the multiple main water tanks are outwards and fixedly connected with supporting faces respectively, and U-shaped connecting grooves are detachably connected to the main water tanks; the plurality of photovoltaic modules are respectively arranged between two adjacent main water tanks, long frames of the photovoltaic modules are fixedly connected between the U-shaped connecting grooves and the supporting surfaces, buckle plates are arranged at the tops of rear short frames of the photovoltaic modules, and the buckle plate on one photovoltaic module is connected with the front short frame on the adjacent photovoltaic module. The drainage device is convenient and fast to install, large in drainage amount, capable of preventing rainwater from overflowing and suitable for areas with large drainage amount.

The utility model discloses an arc-shaped scraping and exhausting structure of an attached curved surface full-glue tempered film, which comprises a limiting shell, a top cover is arranged on the upper side of the limiting shell, an exhausting unit is arranged on the right side of the top cover, the exhausting unit comprises a fixed shell, the fixed shell is arranged on the right side of the top cover, and the fixed shell is arranged on the right side of the top cover. A first clamping groove and a second clamping groove are formed in the lower side of the fixing shell, a pushing piece is arranged on the inner side of the second clamping groove and comprises a middle arc-shaped pushing block and side blocks, the side blocks are fixedly connected to the left side and the right side of the middle arc-shaped pushing block, and sliding grooves are formed in the lower sides of the left end and the right end of the fixing shell. By arranging the fixing shell, the second clamping groove, the pushing piece, the middle arc-shaped pushing block and the side blocks, people can conveniently hold the fixing shell by hand to push the arc-shaped pushing piece, gas on the two sides of the full-glue tempered film gathers towards the middle, the gas displacement is increased, the impact force is high, and the situation that when the curved-surface full-glue tempered film is attached, gas exhausting is not smooth, many residual bubbles exist, and the film attaching effect is reduced is avoided.

The utility model discloses a quick cooling sintering furnace, which relates to the technical field of powder metallurgy, and comprises a sintering furnace body and a blast assembly, a heating bin is arranged in the sintering furnace body, a support table is arranged on the inner wall of the bottom of the sintering furnace body, and the blast assembly for blast is arranged on the outer wall of the bottom of the sintering furnace body. Ventilation pipes are connected to the outer walls of the two sides of the air blower, and an air spraying opening is formed in the outer wall of the top of the annular pipeline. According to the rapid cooling sintering furnace, after machining is completed, an air blower sucks external air, the external air passes through a ventilation pipe and then is sprayed into the heating bin through an annular pipeline and an air spraying opening, and hot air is exhausted through an air outlet, so that the cooling speed of the interior of the heating bin is increased, and the sintering furnace body is cooled through a first cooling pipe; and the second cooling pipe is used for cooling the first cooling pipe, so that the situation that the cooling effect of the cooling liquid on the upper layer of the first cooling pipe from bottom to top is poor is prevented.

The invention discloses an urban bumpy road surface waterlogging prevention drainage device, and belongs to the technical field of drainage equipment.The urban bumpy road surface waterlogging prevention drainage device comprises an installation surrounding piece, first grating filter plates are installed at the two ends of the interior of the installation surrounding piece, first installation grooves are formed in the two sides of the bottom of each first grating filter plate, and movable blocks are arranged in the first installation grooves; a first spring is connected between the movable block and the first grid filter plate, and a blocking floating plate is mounted at the bottom of the movable block. In an initial state, only a gap is reserved between a blocking floating plate and a first grating filter plate to serve as a conventional drainage hole, and a movable block is connected with the first grating filter plate through a first spring, so that in a conventional state, outward diffusion of peculiar smell can be greatly reduced, and meanwhile, when the drainage pressure is large, the drainage effect is greatly improved. And the pressure of water can drive the gap between the blocking floating plate and the first grid filter plate to be increased, so that a smooth drainage task is realized.

The invention discloses an indium phosphide quantum dot with a large Stokes shift and a preparation method thereof, and relates to the technical field of quantum dot materials. The preparation method comprises: isolating an indium precursor from oxygen and water at a first temperature, fully dissolving it, adding a phosphorus precursor and then raising the temperature to a second temperature to react, obtaining an indium phosphide core, then adding a shell precursor, raising the temperature to a third temperature, obtaining a quantum dot of a core-shell structure, and then sequentially adding anion and cation precursors at the third temperature to obtain a quantum dot with an emission peak adjustable between 465 and 650 nm, high quantum efficiency and a large Stokes shift. The quantum dot mainly has a large Stokes shift to suppress self-absorption and non-radiative resonant energy transfer, a wide bandgap shell can effectively passivate surface defects, achieve a high fluorescence quantum efficiency, and the position of the fluorescence emission peak can be adjusted in the visible light range by changing the activity of the precursor, does not contain heavy metal elements such as cadmium and lead, and is relatively friendly to the environment.

The utility model discloses an underground rapid drainage device which comprises a well lid, the well lid is installed at a sewer opening, a gutter channel is formed in the well lid, a drainage cylinder is installed in a sewer below the well lid, a connecting cylinder is arranged at the bottom end of the drainage cylinder, and the drainage cylinder of an integrated structure is installed at the bottom end of the connecting cylinder. A drainage device is installed in the drainage cylinder, and a supporting skirt edge is arranged in the center of the interior of the drainage cylinder. According to the underground drainage device, the detachable filter screen is arranged in the drainage cylinder, some sundries can be filtered through the filter screen, after the sundries are filtered, the filter screen can be taken out, and the sundries can be cleaned, so that the situation that the sundries affect the underground drainage efficiency is avoided, the drainage cylinder is arranged at the bottom end of the drainage cylinder, and a drainage device is arranged in the drainage cylinder; the motor drives the rotating shaft to rotate, and the drainage paddles on the rotating shaft can drain water, so that the drainage efficiency is improved, the drainage amount is increased, and the function of rapid drainage is realized.

The utility model provides an underground garage anti-flooding structure which comprises a ramp, a drainage groove is formed in the high position of the ramp, a water permeable plate covers the drainage groove, a plurality of water permeable holes are evenly formed in the water permeable plate, and a water baffle is integrally connected to the side, close to the low position end of the ramp, of the bottom end of the water permeable plate. A base connected with the water baffle in a sliding mode is embedded in the ramp, a first elastic piece is connected between the water baffle and the base, the first elastic piece enables the water baffle to keep the trend of moving upwards, a locking assembly and a triggering assembly are arranged on the base, the locking assembly can limit the water baffle in the base, and the triggering assembly can trigger the water baffle to move upwards. And the triggering assembly can enable the locking assembly to relieve the limitation on the water baffle. The utility model not only has quick response, but also is more convenient to operate.

The utility model discloses a pre-compression safety spring pneumatic actuator, belongs to the technical field of pneumatic actuators, and solves the problems that rigid collision is easy to occur in an internal structure propped against a piston rod in the pneumatic actuator, then the internal structure is damaged, and the displacement of the piston rod needs to be damped in the process. Comprising an upper end cover, a lower end cover, a cylinder body fixedly connected between the upper end cover and the lower end cover, a movable piston connected in the cylinder body in a sliding mode and a piston rod fixedly connected to the movable piston and penetrating through the lower end cover, a spring base is connected to the side, away from the piston rod, of the movable piston in a sealed mode, and a spring cover is fixedly connected to the side, facing the lower end cover, of the upper end cover. The spring cover is fixedly connected with a limiting column penetrating into the spring base. The spring base is pulled through the spring module, air is exhausted from the through hole of the upper end cover, the limiting column is connected with the base in a sealed mode, compressed air provides damping, air is further sucked, the displacement of the piston is increased till abutting, damping is increased, and large impact is avoided.