370results about How to "Novel structure" patented technology

The utility model relates to a carburetor capable of improving starting effect, which comprises a carburetor body, a diaphragm pump is arranged on the outer side portion of the carburetor body, an upper oil port is arranged on the diaphragm pump, an oil inlet hole channel communicated with the upper oil port is arranged on the carburetor body, and the oil inlet hole channel is communicated with an oil cavity in the diaphragm pump. A manual oil recharging pump is arranged on the outer side portion of the carburetor body, an oil inlet of the manual oil recharging pump is communicated with the oil inlet hole channel, and an oil outlet of the manual oil recharging pump is communicated with an oil cavity in the diaphragm pump. The carburetor with the improved starting effect is novel in structure and reasonable in design, on the basis of an original diaphragm pump, the manual oil supplementing pump is connected in parallel, when an engine is started, the oiling speed can be increased by rapidly pressing the manual oil supplementing pump, the starting speed of the engine is greatly increased, and the starting effect is good.

The application relates to a thioether-containing pleuromutilin derivative, a preparation method and application thereof; the structural formula is shown in formula H; through antibacterial activity test on the thioether-containing pleuromutilin derivative, it is proved that the thioether-containing pleuromutilin derivative has good antibacterial activity on rice bacterial leaf blight, rice bacterial disease and citrus canker bacteria. The thioether-containing pleuromutilin derivative can be applied to preparation of a rice bacterial disease prevention and control agent, and the preparation method is simple, and the production cost is low.

The invention belongs to the technical field of synthesis of 2, 3-dipicolinic acid, and relates to a catalyst for synthesizing 2, 3-dipicolinic acid as well as a preparation method and application thereof, the catalyst is prepared from a carrier, and active components and auxiliaries loaded on the carrier; the carrier is boron nitride modified aluminum oxide, the active component is palladium-cobalt bimetal, and the auxiliary agent is magnesium; the catalyst comprises the following components in percentage by mass: 0.2 wt%-3wt% of palladium, 0.5 wt%-4wt% of cobalt, 0.05 wt%-0.3 wt% of magnesium, 5wt%-15wt% of boron nitride and the balance of an aluminum oxide carrier. The catalyst is prepared by adopting an ultrasonic-assisted sol-gel method, so that high dispersion and strong interaction of active components are realized. The catalyst shows high catalytic activity, high selectivity and excellent stability in a dichloropyridine carbonylation reaction, carbon monoxide is used as a carbonyl source, the atom economy is high, and the green chemical requirement is met.

The application discloses a wall body concrete pouring construction device and a construction method, which comprise a supporting base, a steel bar frame, a formwork splicing assembly, a lifting assembly and a sliding grouting assembly, two supporting bases are fixedly arranged on a horizontal ground at intervals, the steel bar frame is arranged between the two supporting bases, two formwork splicing assemblies are symmetrically arranged on the two sides of the steel bar frame, each formwork splicing assembly comprises a formwork storage box and a transfer assembly arranged in the formwork storage box, the transfer assembly is used for sequentially transferring the formwork to the opening of the formwork storage box and splicing the formwork on the side of the steel bar frame, the lifting assembly is used for driving the formwork storage box to lift, and the sliding grouting assembly comprises sliding rail assemblies arranged at the top of the two formwork storage boxes respectively, a sliding plate slidingly connected between the two sliding rail assemblies and a fixing piece arranged on the sliding plate. In general, the application has the advantages of novel structure, simple construction, stability, high efficiency and the like.

The utility model discloses a kind of cutting device of rubber cutting piece, including device ontology, device ontology includes machine case and cutting assembly, machine case top is equipped with cutting platform, the front side of cutting platform is equipped with ball screw, the rear side of cutting platform is equipped with opening, opening is built-in with rotary table, first infrared positioning sensor is equipped on rotary table, cutting assembly is equipped with cutting seat, second infrared positioning sensor is equipped on the rear side of cutting seat, second infrared positioning sensor and first infrared positioning sensor dynamic docking.The utility model is by setting ball screw on cutting platform, pneumatic fixed clamp is equipped on ball screw, it is conveyed by ball screw, compared with the conveying mode of conveying belt, it is accurate and stable to convey, can avoid displacement;The rear side of cutting platform is provided with rotary table, the correction of rubber cutting piece center coordinate and offset angle can be realized by first infrared positioning sensor and second infrared positioning sensor, realize the function of rectification, guarantee the accuracy of cutting.

This utility model discloses a fascia gun with a heating function, including a shell, a middle frame, a telescopic head, a main control board, a frame, and a power cable. The shell includes a first hollow cylinder and a second hollow cylinder vertically connected. The middle frame is located inside the shell and has a first through hole with a first cable-fixing sleeve at the through hole. The telescopic head includes a telescopic component and a massage head connected together. The telescopic component is slidably mounted on the second end of the first hollow cylinder and has a second through hole with a second cable-fixing sleeve at the through hole. The massage head contains a heating element. The frame is located inside the shell and has a cable-passing hole connecting its opposite sides, located below the motor. The power cable passes through the cable-passing hole, the first cable-fixing sleeve, and the second cable-fixing sleeve in sequence before connecting to the heating element. This fascia gun has a novel structure. The cable-passing hole, the first cable-fixing sleeve, and the second cable-fixing sleeve effectively restrict the power cable, thereby preventing unexpected deviation of the power cable within the shell.

This invention belongs to the field of mineral flotation technology, and discloses a flotation collector for non-ferrous metal sulfide ores, its preparation method, and its application. The collector uses O,O-dialkyldithiophosphate as a starting material, and reacts sequentially with a halocarboxylic acid ester, hydrazine hydrate, potassium hydroxide, and carbon disulfide in anhydrous ethanol in a three-step reaction to obtain the target product, O,O-dialkyldithiophosphate hydrazide-N′-dithiocarbamate potassium. Its molecular structure simultaneously contains three active groups: a dithiophosphate group, an hydrazide group, and a dithiocarbamate group. This invention achieves efficient process connection and smooth transition by optimizing the material ratio, temperature, and time of each reaction step, and has advantages such as mild reaction conditions, simple operation, few side reactions, high yield, and stable product. The prepared collector exhibits excellent collecting performance and good selectivity for non-ferrous metal sulfide ores such as chalcopyrite, and is suitable for widespread application in sulfide ore flotation processes.

The utility model discloses a through netlike inhaul cable large-span arch bridge design and construction device which comprises a bridge floor, arch ribs and air cylinders, the arch ribs are arranged on the bridge floor in a bilateral symmetry mode, straining beams are correspondingly arranged on the left side and the right side of the bridge floor, a plurality of inhaul cables are arranged between the straining beams and the arch ribs, the inhaul cables are crossed to form a netlike structure, and the air cylinders are detachably arranged on the tops of the straining beams. The driving end of the air cylinder is connected with the bottom of the inhaul cable which is telescopic through the air cylinder. A plurality of air cylinders are installed at the top end of the straining beam, the air cylinders are connected with the tail ends of the inhaul cables to stretch out and draw back the inhaul cables, the inhaul cables stretch out and draw back to adjust pulling force between the arch rib and the straining beam, a better stable structure is achieved, and installation is convenient and fast. The fixed seat of the cylinder is detachably combined, so that the maintenance, assembly and disassembly are convenient, and daily maintenance is convenient; end cross beams are arranged at the front end and the rear end of the bridge floor, cross-shaped cross beams and longitudinal beams are arranged in the middle, and orthogonal special-shaped plates are poured, so that the bridge floor is stable and does not need to be supported by bridge piers; the device is novel in structure, high in practicability and suitable for popularization.

The utility model discloses a sounding unit, including basin stand, magnetic circuit system, conducting centering disk and a plurality of voice coil, magnetic circuit system is connected basin stand, magnetic circuit system includes yoke, and the central magnetic subassembly and first side magnetic structure that are respectively provided on yoke, central magnetic subassembly is located between at least one group of two oppositely arranged first side magnetic structure, the central magnetic assembly comprises a plurality of central magnetic structures which are arranged side by side, the yoke is provided with a window, two opposite side edges of the window are respectively connected with flanges, and the flanges are provided with openings; the voice coils and the central magnetic structures are arranged in a one-to-one correspondence manner, and partial areas of the voice coils are located between the central magnetic structures and the flanges; the conduction centering disk comprises an inner mounting part, a cantilever part and an outer mounting part which are connected in sequence, a partial area of the cantilever part corresponds to the window and is located between the two flanges, one end of the inner mounting part penetrates through the opening and is fixedly connected with the voice coil, and the outer mounting part is connected with the basin stand. The sound production unit has high performance.

The utility model discloses an SIM card tray detection device which comprises a workbench, two supporting plates are fixedly connected to the top of the workbench, two rotating rollers are rotationally connected between the two supporting plates, a conveying belt is arranged on the outer sides of the two rotating rollers, and a plurality of fixing seats are fixedly connected to the outer side of the conveying belt at equal intervals. The beneficial effects of the utility model are that: it is novel in structure, simple to operate, easy to master, not only compact in structure, but also stronger in practicality, and more convenient to use. Compared with a traditional device, by arranging the fixing base, the rotating shaft, the electromagnet, the magnet, the connecting rod, the clamping base, a first spring, a touch switch, a gear ring, a touch rod and a rack, the electromagnet can be controlled to be powered on by triggering the touch switch after the fixing base moves to the clamping position, then the touch switch generates repulsive force on the magnet, and the clamping effect is achieved. In this way, the first spring is compressed and the clamping seat is driven to clamp the SIM card support.

A quick connector for automatic oiling equipment, through the cooperation of metal sealing surface and axial needle valve core, automatically removes impurities and realizes rapid sealing during butt joint process; at the same time, the linkage locking structure of rotating steel ball and elastic sleeve is used to reduce the centering accuracy requirement and improve the adaptability and reliability of unmanned oiling system. The quick connector nozzle body and the quick connector valve body are included; the valve core, spring, valve seat and needle are installed in the quick connector nozzle body to form a valve core assembly and are installed in the center channel of the connector nozzle body. There is a sealing ring between the connector nozzle body and the valve core; the connector nozzle body is sleeved by the sleeve and is provided with a sealing ring and a spring; the mechanical connecting rod device is arranged outside the quick connector nozzle body and is composed of a connecting rod and a connecting pin; the tail end of the connector nozzle body is fixedly connected with the external oil pipe. The application has the advantages of novel structure, convenient operation, safety and reliability, significantly improves the efficiency and stability of ground unmanned oiling operation, and has good practical application and popularization value.

The utility model relates to a feeding and discharging mechanical hand for winding machine belongs to mechanical technical field. The horizontal side plate is provided with feeding and discharging mechanical hand, and feeding and discharging mechanical hand is located the above of wire reel mounting structure, and feeding and discharging mechanical hand includes the cylinder support of installation in horizontal side plate, and is provided with lifting cylinder on cylinder support, be provided with lifting support plate on the cylinder axle of lifting cylinder, be provided with rotating structure on lifting support plate, be provided with sucking disc connecting structure on rotating structure. The utility model has the advantages that: when using, according to the need of actual situation, install multiple sucking disc, and adjust the distance between sucking disc, drive the lifting of sucking disc through lifting cylinder, drive sucking disc rotation through rotating motor, realize the adsorption of wire reel with sucking disc through the above -mentioned method, thereby realize the automatic feeding and discharging of wire reel, solve the problem of low production efficiency caused by manual feeding and discharging in prior art, the utility model novel structure, convenient operation.

The application discloses a kind of safety automatic control flow's casting equipment, including melt pool, aluminium water inlet pool and pump chamber, melt pool is connected to aluminium water inlet pool by aluminium water channel in furnace, pump chamber is connected with aluminium water inlet pool by bottom inlet channel, impeller is provided in pump chamber, aluminium water outlet channel is connected with aluminium water steady flow pool above pump chamber, aluminium water steady flow pool bottom is provided with steady flow pool flow eye, steady flow pool flow eye is connected with outlet flow groove, steady flow pool flow eye outer end is provided by the plug head for plugging steady flow pool flow eye;Method, S1: melt raw material in melt pool, obtain aluminium water;S2: aluminium water flows into to pump chamber, then flows into to aluminium water steady flow pool;S3: aluminium water in aluminium water steady flow pool, flow into to outlet flow groove;S4: aluminium water in outlet flow groove flows into to corresponding aluminium piece casting tray, corresponding need to be manufactured aluminium piece can be obtained;Effect: method structure is novel, steady flow pool flow eye and melt pool are not directly communicated, increase insurance for aluminium casting safety, guarantee safety.

The invention belongs to the technical field of organic compounds, and particularly discloses an indolinone compound and a synthesis method thereof. The molecular structural formula of the indolinone compound is shown as a formula (A), and the synthesis method of the indolinone compound comprises the following steps: S1, carrying out an amide condensation reaction on a compound shown as a formula (1) to generate a compound shown as a formula (2); s2, performing aminolysis reaction on the compound as shown in the formula (2) to generate a hydrazide compound as shown in a formula (3); s3, carrying out nucleophilic substitution reaction on the compound as shown in the formula (4) to generate a compound as shown in a formula (5); and S4, carrying out condensation reaction on the compound as shown in the formula (3) and a compound as shown in a formula (5) to generate the indolinone compound as shown in a formula (A). The indolinone compound provided by the invention is novel in structure, mild and simple in synthesis method and high in yield, and the indolinone compound is also found to be effective in antibiosis.

A space cam type multi-stage quasi-zero stiffness ultra-low frequency vibration isolator capable of capturing high-entropy energy belongs to the technical field of vibration isolation and vibration energy capture. The problem that traditional quasi-zero stiffness vibration isolation devices are difficult to adapt to multi-stage vibration isolation load due to structural limitations is solved, and sensor self-power supply and intelligent detection are realized. The bottom of the positive stiffness spring and guide beam assembly is connected to the base through a bolt and nut, the sliding end is connected to the load platform through a bolt and nut, four groups of negative stiffness piezoelectric beam assemblies are installed on the support in clockwise order, the vertical guide rail of each negative stiffness piezoelectric beam assembly is connected to the load platform through a bolt and nut, four moving cam sliding grooves are connected to the load platform through a bolt and nut in clockwise order, and the deep groove ball bearing in the negative stiffness piezoelectric beam assembly slides into the corresponding cam sliding groove to form a cam pair. The present application can realize multi-stage load quality vibration isolation and sensor self-power supply, and has the advantages of novel structure, low frequency vibration isolation, wide frequency energy capture and flexible design.

The ratchet wheel type lifting device comprises a fixing frame, a rotating shaft, a handle, a transmission disc, a gear shifting assembly, a reversing assembly, a power gear and a rack, and the rotating shaft is rotatably arranged on the fixing frame; the handle is fixedly connected with the rotating shaft; the transmission disc is rotatably arranged on the rotating shaft in a sleeving manner, and a transmission shaft is rotatably arranged on the transmission disc in a penetrating manner; the gear shifting assembly is located on one side of the transmission disc and comprises a transmission wheel, an operation block, a reset piece and two clamping jaws, the transmission wheel is fixedly arranged on the rotating shaft, the clamping jaws are rotatably arranged on the transmission disc and used for locking the transmission wheel, and the reset piece is connected with the clamping jaws to drive the clamping jaws to rotate in the direction close to the transmission wheel. The operation block is fixedly arranged at one end of the transmission shaft and located between the two clamping jaws. The operation block is used for driving the two clamping jaws to be away from each other so as to unlock the transmission wheel. The reversing assembly is located on the other side of the transmission disc. According to the ratchet wheel type lifting device, a user can conveniently and safely lift heavy-load parts in fitness equipment in a labor-saving manner.

The utility model discloses a sounding unit, which comprises a yoke, a plurality of voice coils and at least four central magnetic structures, the yoke is provided with a plurality of longitudinal windows and a plurality of transverse windows, the longitudinal windows are communicated with the transverse windows, two opposite sides of the longitudinal windows are respectively provided with longitudinal flanges, and two opposite sides of the transverse windows are respectively provided with transverse flanges; the central magnetic structures are arranged on the yoke, the at least four central magnetic structures are arranged in an N * M rectangular array, N is an even number greater than or equal to 2, and M is an even number greater than or equal to 2; longitudinal windows are correspondingly arranged between every two adjacent columns of center magnetic structures, and transverse windows are correspondingly arranged between every two adjacent rows of center magnetic structures. The magnetic poles of the two adjacent central magnetic structures face opposite directions; the voice coils and the center magnetic structures are arranged in a one-to-one correspondence mode, and when the voice coils are powered on, the current flow directions of the adjacent edges of every two adjacent voice coils are the same. The sound production unit overcomes the problem of vibration sound production of a sound production unit with a multi-voice-coil structure in a non-starting state.

The invention discloses a TADF type compound as well as a preparation method and application thereof. The compound has a structural formula as shown in a formula I; the invention provides a series of TADF type compounds with novel structures, and the compounds can effectively improve the X-ray absorption capacity, can be used for preparing organic scintillator materials with low cost and low detection limit, and can be applied to X-ray imaging.

The application discloses a machine tool center bracket and a using method, which comprises a ring-shaped frame and a plurality of supporting components arranged on the ring-shaped frame, the supporting components are used for supporting workpieces located on the inner side of the ring-shaped frame, each supporting component comprises a sleeve, a main supporting claw and two auxiliary supporting claws; the sleeve is integrally arranged on the ring-shaped frame, and the sleeve is provided with a first adjusting component; the main supporting claw is movably sleeved in the sleeve, the first adjusting component is used for adjusting the position of the main supporting claw in the sleeve, the inner end of the main supporting claw towards the center of the ring-shaped frame is provided with an expansion piece, the distal end of the expansion piece is movably provided with a first roller, and the inner portion of the main supporting claw is provided with a second adjusting component; the two auxiliary supporting claws are movably and symmetrically arranged on the two sides of the main supporting claw, the second adjusting component is used for synchronously adjusting the included angle between the two auxiliary supporting claws and the main supporting claw, and the distal ends of the two auxiliary supporting claws are respectively movably provided with second rollers. In general, the application has the advantages of novel structure, convenient use, safety and stability and the like.

The utility model relates to a kind of natural gas hydrogen-oxygen gas negative pressure mixer structure, including fixed seat, ignition device, gas pipe, hydrogen-oxygen gas pipe and combustion air duct, the gas pipe and hydrogen-oxygen gas pipe are located in combustion air duct inside, combustion air duct front end is provided flame outlet, hydrogen-oxygen gas pipe front end is connected with gas pipeline middle section by jet mixer, gas pipe front end is closed and has gas hole around, gas pipe front end stretches to flame outlet place.The utility model natural gas hydrogen-oxygen gas negative pressure mixer structure structure is novel, reasonable in design, using internal mixing structure, hydrogen-oxygen gas and gas are mixed in burner, avoid the security risk that hydrogen-oxygen gas exists in external premixing, improve safety, and mixed by jet mixer, utilize venturi effect, by the negative pressure formed active suction hydrogen-oxygen gas generated, ensure that mixing is uniform, improve combustion efficiency, reduce energy loss.

The present application relates to ANXA3 protein targeted degradation chimera and its preparation method and application. Specifically, the present application relates to ANXA3 protein targeted degradation chimera, or its pharmaceutically acceptable salt, or its stereoisomer, or a pharmaceutical composition composed of a medically acceptable carrier, and the use in preparing ANXA3 protein targeted degradation chimera and the use in preparing drugs for preventing and / or treating breast cancer. The present application utilizes the PROTAC technology to provide a kind of ANXA3 protein targeted degradation chimera, which can combine ANXA3 protein, selectively degrade ANXA3 protein, inhibit the proliferation of breast cancer cells in vitro, and play the role of anti-breast cancer. Breast cancer refers to breast cancer molecular subtypes such as triple negative, Luminal A type, Luminal B type, Her2+ type.

The application discloses acetoacetamide modified polyvinyl alcohol and a preparation method thereof, and the preparation method comprises the following steps: reacting p-ester and an acetoacetamide reagent at 20-80 DEG C for 1-3h in a polar solvent to generate N-acetoacetyl p-ester; then, the N-acetoacetyl p-ester is mixed with an alkaline catalyst and polyvinyl alcohol, and is added into a double-screw reaction extruder to generate N-acetoacetyl p-ester modified polyvinyl alcohol crude product; finally, the crude product is powdered, washed with methanol for three times to remove the catalyst and reaction inorganic salt, and is filtered and dried to obtain the N-acetoacetyl p-ester modified polyvinyl alcohol. The AAE-PVA prepared by the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, has better water resistance than common polyvinyl alcohol, and the water resistance, tensile strength and stability of the prepared emulsion adhesive are obviously improved. The synthesis steps of the application are simple, the safety risk is low, and the reaction yield is high.

The utility model relates to a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stubble cleaning and crushing monomer belongs to agricultural machinery, and the utility model discloses a height and angle adjustable three-dimensional horizontal stub

The invention provides a directional diagram reconfigurable liquid transparent antenna applied to ocean communication. The antenna is composed of a hexagonal star-shaped radiation cavity, an inverted L-shaped feed probe and a liquid ground. Through design and processing, besides a feed structure, the whole antenna realizes full transparency, has a good optical stealth effect, and has more application scenes. By utilizing the liquidity of liquid, distilled water is injected into different cavities, and the electric field distribution of the radiation cavity is changed, so that different patterns are generated. The antenna can realize a reconfigurable function of a directional diagram at 2.22-2.63 GHz, has five states of directional diagram switching modes, namely + / -15 degrees, + / -35 degrees and 0 degree, has better impedance matching and radiation directivity, and has a good optical stealth effect due to the transparent appearance.

The utility model discloses a double-end stud feeding machine which comprises a machine frame, a feeding device and a distributing device, the feeding device and the distributing device are respectively arranged on the machine frame, the feeding device is provided with a feeding track, the distributing device comprises a base and a pushing mechanism arranged on the base, the base comprises a shell with an inner cavity, the inner cavity is communicated with the top face of the shell, and the pushing mechanism is arranged on the base. The shell is provided with an inner cavity, the inner cavity is provided with a feeding position, a first discharging position and a second discharging position, an industrial camera is arranged above the feeding position, the side wall of the shell is provided with a feeding port, a first discharging port, a second discharging port, a first blowing port and a second blowing port, the feeding port is communicated with the feeding position, the first discharging position and the first blowing port are arranged corresponding to the two ends of the first discharging position respectively, and the second blowing port is communicated with the first discharging position. The second discharging position and the second air blowing port are arranged corresponding to the two ends of the second discharging position respectively; the pushing mechanism is used for conveying the double-end studs located at the feeding position to the first discharging position or the second discharging position. The double-end stud feeding machine is novel in structure, and quick and orderly feeding of double-end studs can be achieved.

The utility model discloses a kind of double-section delay output module in fire-fighting equipment, including voltage stabilizing module, single-chip microcomputer chip and two switch output modules, voltage stabilizing module is used to convert external power supply into working voltage and power supply to single-chip microcomputer chip, single-chip microcomputer chip has two control signal output ends, and two control signal output ends can be according to the time sequence interval output control signal set inside single-chip microcomputer chip;The signal input end of two switch output modules is respectively connected with two control signal output ends, to realize the output end interval of two switch output modules and carry out output.The circuit structure of the double-section delay output module is simple, novel, reasonable, can realize interval output two-way switch quantity signal, very good meet the control requirement of complex control loop, improve the flexibility of electrical circuit design.

The utility model discloses a sound production unit, which comprises a diaphragm assembly, a voice coil, a spacer, two basins and two magnetic circuit assemblies, and at least one of the basins is provided with a sound outlet. The magnetic circuit assemblies are connected with the basins in a one-to-one correspondence manner, and each magnetic circuit assembly is provided with a magnetic gap; the two sides of the vibrating diaphragm assembly are respectively connected with the basin stand, and the center of the vibrating diaphragm assembly is provided with a hollow window. The voice coil is located at the hollow window and is connected with the diaphragm assembly, and the top end and the bottom end of the voice coil respectively extend into the two magnetic gaps; the spacer is arranged in the hollow area of the voice coil, and the edge of the spacer is connected with the inner peripheral wall of the voice coil. The sound production unit is novel in structure, adopts a double-magnetic-circuit design, can fully utilize the front and rear cavity spaces of the sound production unit, increases the total volume of the magnetic steel, and improves the performance of the sound production unit; the structure of the single voice coil enables the sounding unit to be simpler in structure, facilitates the production of the sounding unit, and facilitates the control of the manufacturing cost of the sounding unit.

The invention discloses a cerium-based photosensitizer, a preparation method and application of the cerium-based photosensitizer in photocatalytic reaction, and relates to the technical field of coordination chemistry and photocatalysis. The general formula of the cerium-based photosensitizer is Ce (L1) 3 (L2) m, and L1 comprises a strong field anion ligand of at least one strong electron withdrawing group or a strong field anion ligand of a rigid structure; l2 is a neutral nitrogen-containing heterocyclic ligand, and m is 0 or 1. According to the invention, strong visible light absorption and long excited state life can be achieved by introducing L1, and the Ce < + > / Ce < 4 + > oxidation potential can be reduced to a mild range, so that the Ce < 4 + > intermediate can be efficiently reduced by a mild reducing agent generated in the reaction, and simple catalytic circulation without an external reinforced reducing agent is realized. When being applied to boronation reaction of various alkenyl / aryl / heteroaryl halides and various organic boron reagents, the photosensitizer shows high catalytic activity (the yield is as high as 91%), the performance is superior to that of a noble metal photosensitizer, but the cost is remarkably reduced, and the photosensitizer is environment-friendly.