74results about How to "Reduce energy dissipation" patented technology

The invention subject of this application pertains to a method and apparatus for measuring the subterranean lithology using electromagnetic energy. The invention is applicable to the measurement from within uncased boreholes, i.e., and open-holes. The present invention transmits and receives electromagnetic energy deep into a geologic formation from a borehole, while also providing high resolution for distant measurements and the ability to control the direction in which the measurements are taken. The invention does not require a receiver to be located at the ground surface or in another borehole. In simple terms, the apparatus of this invention is able to "look around" into the surrounding geologic formation from a stationary position.

The invention discloses a high-altitude propeller and a propeller tip winglet capable of improving efficiency of the high-altitude propeller. The propeller tip winglet is of an upswept winglet form and comprises a winglet straight plate section and a winglet transition section, wherein the height of the propeller tip winglet is 3%-4% of the length of half propeller diameter of a base propeller; the height of the winglet straight plate section is 2%-3% of the half propeller diameter of the base propeller; the length of an end side stance wing-shaped chord of the propeller tip winglet is 60%-65% of the length of a propeller tip stance wing-shaped chord of the base propeller; the length of an intersection stance wing-shaped chord is 73%-78% of the length of a propeller tip stance wing-shaped chord of the base propeller; a torsion angle of the winglet straight plate section is 3-5 degrees smaller than a propeller tip stance wing-shaped torsion angle of the base propeller; a front edge sweepback angle of the propeller tip winglet is 10-15 degrees smaller than that of the propeller tip of the base propeller; an inclination angle of the propeller tip winglet is 35-45 degrees. The propeller tip winglet is capable of effectively reducing the strength of the inductive vortex of the propeller tip, reducing the energy dissipation of a screw propeller and finally effectively improving the working efficiency of a high-altitude propeller propelling system.

The invention subject of this application pertains to a method and apparatus for measuring the subterranean lithology using electromagnetic energy. The invention is applicable to the measurement from within uncased boreholes, i.e., and open-holes. The present invention transmits and receives electromagnetic energy deep into a geologic formation from a borehole, while also providing high resolution for distant measurements and the ability to control the direction in which the measurements are taken. The invention does not require a receiver to be located at the ground surface or in another borehole. In simple terms, the apparatus of this invention is able to “look around” into the surrounding geologic formation from a stationary position.

Tunable, bio-functionalized, nanoelectromechanical systems (Bio-NEMS), micromechanical resonators (MRs), nanomechanical resonators (NRs), surface acoustic wave resonators, and bulk acoustic wave resonators having superhydrophobic surfaces for use in aqueous biochemical solutions. The MRs, NRs or Bio-NEMS include a system resonator that can vibrate or oscillate at a relatively high frequency and to which an analyte molecule(s) contained in the solution ○ can attach or upon which small molecular-scale forces can act; a device for adjusting a relaxation time of the solution, to increase the quality (Q-factor) of the resonator inside the solution, to reduce energy dissipation into the solution; and a device for detecting a frequency shift in the resonator due to the analyte molecule(s) or applied molecular-scale forces. The resonator can include roughness elements that provide superhydrophobicity and, more particularly, gaps between adjacent asperities for repelling the aqueous solution from the surface of the device.

The invention provides a multilayer film for a low load working condition of a micro electro mechanical system and a preparation method thereof. The multilayer film comprises a coupling agent layer, an elastomer layer and a hard film layer sequentially from bottom to top, wherein, the coupling agent layer and the elastomer layer are combined by chemical reaction, and the hard film layer is deposited on the surface of the elastomer layer. The preparation method comprises the following steps: cleaning an Si chip to remove organic impurities and surface oxide; carrying out hydroxylation on the cleaned silicon chip; allowing a commercially available silane coupling agent containing ethoxy to react with the hydroxylated silicon surface by a self-assembly technique so as to link the coupling agent with the silicon surface through chemical bonds; then allowing maleic anhydride on thermoelastic plastics to react with amido on the coupling agent by the self-assembly technique again to complete the chemical bond linkage of the coupling agent and the elastomer; and depositing an DLC film on the surface of the elastomer. The film prepared by the invention can improve the friction and wear resistance of silicon devices, reduce energy dissipation generated in the friction process of materials, and improve the tribological performance of the materials.

The invention discloses an independent tuning microwave electron gun with external cathode which is composed of an external negative pole, namely, dipolar gun, a microwave cavity, a tuning mechanism, a first cavity input waveguide, a second cavity input waveguide and a cooling water pipe; the external negative pole and the microwave cavity are connected by Kovar flange argon-arc welding, the tuning mechanism and the microwave cavity are connected by braze welding in a hydrogen furnace, the first cavity input waveguide and the second cavity input waveguide are connected with the microwave cavity by braze welding, but the first cavity input waveguide and the second cavity input waveguide are connected at different longitudinal positions of the microwave cavity with the angles being mutually perpendicular, and then connected with a waveguide transmission line fed with microwave power respectively. The invention is designed to solve manufacture technique, so that the electron gun has simple structure and electron beam is excellent in performance, thus providing a novel electron beam source device for compact type free electron laser and electron linear accelerator.

The invention relates to the field of power electronics, and aims to provide an LC buffer current-limiting circuit-based hybrid DC circuit breaker. The circuit breaker comprises two parts comprising an auxiliary branch and a main branch in parallel, wherein an auxiliary DC switch and a main DC switch are respectively arranged, the auxiliary DC switch comprises a rapid isolation switch and an IGBT valve group which are connected in series, the main DC switch comprises an IGBT valve group and a metal oxide lightning arrester which are connected in parallel, an LC buffer current-limiting circuit is arranged in series in the main branch, and in the structure of the LC buffer current-limiting circuit, a buffer capacitor is connected in parallel with the metal oxide lightning arrester, is connected in series with a thyristor reversely connected in parallel and is finally connected in parallel with a current-limiting inductor to form the LC buffer current-limiting circuit. The LC buffer current-limiting loop is employed, fault current rising can be effectively limited, the open-circuit circuit is reduced, the MOA energy consumption is reduced, and the fault circuit removal speed is accelerated; and by employing a half-control device thyristor, the numbers of full-control device IGBTs are reduced, so that the control difficulty and the system cost are reduced, and the circuit breaker is reasonable in design, low in cost and high in reliability.

The invention belongs to the technical field of radio frequency communication and microelectromechanical systems (MEMS), and provides an MEMS piezoelectric resonator with a novel supporting structure in order to overcome the defect that the Q value of the existing MEMS resonator is low. A circular outer frame and an inner supporting beam are additionally arranged in the structure of the MEMS piezoelectric resonator, a connection mode of silicon vibrating block-inner supporting beam-circular outer frame-outer supporting beam-substrate is adopted, the connection position of the circular outer frame and the outer supporting beam is selected at a standing wave node when mechanical waves are transmitted in the circular outer frame, therefore the two strands of mechanical waves transmitted by the inner supporting beam are inverted at the node so as to be mutually counteracted, thereby greatly reducing the energy consumption resulting from that a resonance body is transmitted to the substrate by the supporting beam and reducing the loss of anchor points, and accordingly, the quality factor Q of the resonator is improved.

The invention relates to a laser target used for producing ion acceleration. The laser target used for producing the ion acceleration comprises a target body and a target-rear ion source region, wherein the target body is provided with a target front surface and a target rear surface, the target-rear ion source region comprises a middle region and an edge inclined plane region, the rear surface of the middle region is perpendicular to the central axis of the target body, and an inclined included angle is formed between the rear surface of the edge inclined plane region and the central axis of the target body. The laser target used for producing the ion acceleration is based on the acceleration principle that intense lasers and a solid target act on the back of the target to form a sheath layer electrostatic field to accelerate ions or protons in a sheath layer field, the structure of the target front surface and the structure of the target rear surface are optimized, accelerating performance of the laser target is further improved, a peta-watt level intense laser pulse and the action of the peta-watt level intense laser pulse are used, and therefore a high quality ion beam or proton beam applicable to medical treatment application is obtained.

The invention discloses a core-layer foamed composite tubular product and a preparation process thereof. The core-layer foamed composite tubular product consists of an inner-layer material, a core-layer foamed layer and an outer-layer material coaxially in sequence, wherein raw materials for preparing the inner-layer material include medium-density polyethylene, low-density polyethylene, a flame retardant, calcium carbonate and an antistatic agent, raw materials for preparing the core-layer foamed layer include an ethylene-maleic anhydride grafted copolymer, butadiene styrene rubber, a foaming agent and a stabilizer, raw materials for preparing the outer-layer material include polyvinyl chloride and MBS resin, and the preparation process comprises the steps of extruding the inner-layer material, extruding the core-layer foamed layer and extruding the outer-layer material to obtain the three-layer composite tubular product. The overall performance of the core-layer foamed composite tubular product prepared by adopting the preparation process is fully improved.

The invention provides a method of laser ion acceleration, belonging to the technical field of ion acceleration. The method of laser ion acceleration includes: adopting circularly polarized lasers to bombard a monolayer target which is a film containing ions to be accelerated; or adopting circularly polarized lasers to bombard high-density gas containing ions to be accelerated which is ejected out through a nozzle. The invention can greatly improve the accelerating gradient and accelerating length of irons, and meanwhile the quality of beam obtained by the acceleration can compare to common radio frequency accelerators.

The invention discloses a split axial plunger pump flow distribution plate with a rotatable outer sealing belt. The flow distribution plate is divided into an inner fixed plate and the outer rotatable sealing belt surrounding the circumferential face of the inner fixed plate, and the inner fixed plate and the outer rotatable sealing belt are connected movably through a sliding bearing. A low-pressure arc through groove and a high-pressure arc through groove are formed in the two sides of the end face of the inner fixed plate respectively, and an upper blind hole and a lower blind hole which are not symmetric are formed in the ring faces between the low-pressure arc through groove and the high-pressure arc through groove. An annular boss is arranged on the inner ring of the outer rotatable sealing belt, and a plurality of dynamic pressure supporting grooves are formed in a half of the end face of the annular boss. The peripheral face of the outer ring of the outer rotatable sealing belt is of a worm gear structure, and a worm gear is meshed with a worm outside the outer rotatable sealing belt to drive the outer rotatable sealing belt to rotate. According to the split axial plunger pump flow distribution plate, the position of the dynamic pressure sealing belt can be adjusted according to the changes of displacement, the rotating speed and the pressure of a plunger pump, so that the overturning degree of a cylinder body of the plunger pump is the minimum, direct metal contact between the cylinder body and the flow distribution plate is effectively avoided, and energy consumption at the auxiliary flow distribution position is reduced especially when the plunger pump runs in the state with the high pressure and a high rotating speed.

The invention relates to the technical fields of petroleum and natural gas, mine engineering, geothermal wells, building foundation engineering construction, geology and hydrological drilling, in particular to a diamond drill bit with a high-efficiency water hole structure. According to the diamond drill bit, a rear water spray hole seat extending to a drill bit body or connected to the drill bitbody is arranged in front of at least one of cutter wings, the rear water spray hole seat is provided with a rear water spray hole communicating with a flow channel in the drill bit, and the rear water spray hole can directly spray water onto cutting teeth on the cutter wings or rocks in front of the cutting teeth. According to the diamond drill bit with the high-efficiency water hole structure, the cutting teeth are fully cooled and cuttings are transported in time in high temperature well drilling, and the drilling performance of the drill bit is greatly improved.

The invention relates to an electron source device for an ultrafast electron diffraction and ultrafast electron microscope. The electron source device comprises a low-power microwave signal source, a phase shifter, a solid amplifier, a klystron, an attenuator and a current circulator, wherein the first phase shifter, the solid amplifier and the klystron are sequentially arranged in the direction along microwave signals output by the low-power microwave signal source, the output end of the klystron is connected with the input end of the power distributor, megawatt level microwave signals output by the klystron are divided into two paths by the power distributor, the first path of microwave signals are input into a cavity 1.5 arranged at the front part of an electron gun sequentially through the first attenuator and the current circulator, and the second path of microwave signals are input into a single cavity arranged at the back part of the electron gun sequentially through the second attenuator and the second phase shifter. The electron source device has the advantages that the beam current divergence degree is inhibited from 10<-3> to a value below 10<-5>, and the space resolution of the ultrafast electron diffraction is improved.

The present invention discloses an electric valve and a refrigerating system comprising the same, wherein an inlet (411), a pressure relief port (412) and a plurality of outlets (413) are set on a valve seat (41) of the electric valve; a valve cap (43) is covered above the valve seat (41); an electric motor (42) is fixedly set on the valve cap (43), a stator (421) of the electric motor (42) is set on the outer surface of the valve cap (43), and a rotor (422) is set in the intracavity of the valve cap (43); the lower end of a mandrel (4221) is fixedly provided with a valve core (44) that is opened with a pressure-relief diversion slot (441) and a through slot (442), wherein the pressure-relief diversion slot (441) is opened on the lower surface of the valve core (44), and the through slot (442) penetrates through the valve core (44) along the thickness direction of the valve core (44). A single-cycle refrigerating system, a dual-cycle refrigerating system and a triple-cycle refrigerating system all comprise such an electric valve, and the functions of the refrigerating system, for example, refrigerant bifurcation, cutoff and pressure relief, etc., may be realized by rotating the valve core (44) of the electric valve to different positions.

The invention provides a low-energy coastal beach restoration design method. The method comprises the steps of constructing an outwards- protruding beach berm outer edge line, determining the transverse-to-longitudinal ratio of the beach berm outer edge line, determining the beach surface gradient, supplementing sand, determining a dredging area and dredging depth, and building a sand blocking dam. According to the method, the characteristic that waves gather on the headland in an auxiliary manner is utilized, the outwards-protruding headland-shaped beach berm outer edge line is constructed through a manual means, the needed beach face range and gradient are determined according to the outwards-protruding beach berm outer edge line, and sand supplementing is performed; when the beach is repaired, desilting is performed on the periphery of the beach face, the outwards-protruding near-shore terrain is constructed while a muddy material source is reduced and the near-shore water depth isincreased, the wave energy of the repaired position is effectively improved, and the situation of beach argillization of the low-energy coast is improved.

The invention discloses an MVR (Mechanical Vapor Recompression) evaporative combination device for percolate and a treating method thereof. The device comprises an energy recovery device which is successively connected with a hot well, a circulating pump, a heat exchanger and a water inlet, wherein the water inlet is connected with a sprayer in the device; a heat exchange pipeline is arranged under the sprayer; the upper end of the heat exchange pipeline is connected with a steam collecting device; a steam compressor is arranged on the middle part of the heat exchange pipeline; a water generating tank is connected with an outlet end of the heat exchange pipeline and an air vent is also formed at the outlet end; the water generating tank is connected with a water generating tank through a water generating pump and the energy recovery device; the circulating pump is connected with a concentrated liquor water inlet pipe of the energy recovery device through a pipeline; the energy recovery device is connected with a concentrated water tank; the heat exchange pipeline of the heat exchanger is connected with the hot well through a pipeline; a steam generator is connected between the hot well and the steam collecting device; a pressure gauge is mounted on the heat exchanger; a control device is respectively in electric connection with the pressure gauge, the water feeding pump, the water generating pump, the concentrated water pump and the steam compressor. The device is used for converting the percolate membrane concentrated solution into the reuse water capable of being directly reused through multi-level heat exchange evaporation.

The invention relates to an electron source device for an ultrafast electron diffraction and ultrafast electron microscope. The electron source device comprises a low-power microwave signal source, a phase shifter, a solid amplifier, a klystron, an attenuator and a current circulator, wherein the first phase shifter, the solid amplifier and the klystron are sequentially arranged in the direction along microwave signals output by the low-power microwave signal source, the output end of the klystron is connected with the input end of the power distributor, megawatt level microwave signals output by the klystron are divided into two paths by the power distributor, the first path of microwave signals are input into a cavity 1.5 arranged at the front part of an electron gun sequentially through the first attenuator and the current circulator, and the second path of microwave signals are input into a single cavity arranged at the back part of the electron gun sequentially through the second attenuator and the second phase shifter. The electron source device has the advantages that the beam current divergence degree is inhibited from 10<-3> to a value below 10<-5>, and the space resolution of the ultrafast electron diffraction is improved.

The invention discloses a sectional type bicrystal piezoelectric electromagnetic composite energy harvester, belongs to the technical field of vibration energy harvesting, and aims to solve a problemthat when a cantilever beam of a traditional piezoelectric electromagnetic energy harvester is subjected to second-order bending vibration, charges of a piezoelectric plate on one side of the cantilever beam are counteracted; and a suspended magnet adopts a linear bearing to limit a motion trail, so that the output of the piezoelectric electromagnetic energy harvester is more stable and efficient.One end of a horizontal piezoelectric cantilever beam is connected with a left stand column of a fixed supporting base through a connecting plate, the upper surface and the lower surface of the otherend of the horizontal piezoelectric cantilever beam are connected with magnets respectively, and the lower surface of an upper cross beam and the upper surface of a lower cross beam of a right standcolumn of the fixed supporting base are connected with a magnet and a coil assembly respectively. And a magnet is suspended in each of the two coil assemblies. The sectional type bicrystal piezoelectric electromagnetic composite energy harvester has the advantages that the structure is novel, the design is flexible, a method for attaching piezoelectric patches to second-order bending vibration nodes on the upper surface and the lower surface of the horizontal piezoelectric cantilever beam in a sectional mode is provided, and the energy harvesting efficiency and performance are improved.

The embodiment of the invention provides a surface plasmon-induced electron emission source, which is characterized in that a pumping source emits light to interact with a metal bull eye optical grating to generate a surface plasmon near field, the light reaches a photocathode material layer through a central small hole and interacts with a photocathode material to generate electrons, an electroncollector collects the electrons, the period of the metal bull eye optical grating and the wave vector of the surface plasmon meet the condition that the cross product of the period of the metal bulleye optical grating and the wave vector of the surface plasmon is an integral multiple of 2pi, and the photocathode material layer is a preset special material, so that the surface plasmon near fieldirradiates the photocathode material to generate a photoinduced electron emission phenomenon. According to the embodiment of the invention, based on a high-resolution electron source combining a photoinduced electron emission principle and surface plasmon polaritons, the energy dissipation of electron beams is reduced, and the brightness is improved.

The invention provides an electrolysis bath electrode, which comprises a positive electrode and a negative electrode, wherein the positive electrode and the negative electrode have same shapes and structures, and both the positive electrode and the negative electrode comprise an electrode contact, a conductor column and conductor cones; the conductor column is a section of cylindrical conductor, the conductor cones are uniformly distributed on the surface of the conductor column; the conductor cones are cone conductors; the electrode contact is arranged above the conductor column and is connected with an external direct current power supply; and the positive electrode and the positive electrode are arranged in electrolytic solution in an electrolysis bath at a certain distance from each other. The electrolysis bath electrode not only can effectively electrolyze solution to prepare required industrial materials, but also optimize the electric field distribution in the electrolysis bath, reduces the energy dissipation of the electrolysis bath, and improves the electrolytic efficiency of the electrolysis bath.

The invention discloses a stilling pool with a continuous incident angle. The stilling pool with the continuous incident angleconsists of an inflow section, a stilling pool, and a tail sill, wherein the inflow section, the stilling pool, and the tail sill are sequentially arrangedin the water flow direction, diffuser sills are arranged on a bottom slope of the tail end of the inflow section, and the two diffuser sills are symmetrically arranged on the left and right sides of the inflow section; the upper surface of each of the diffuser sills is a circular arc surface in the direction of the water flow, the upper surface of each of the diffuser sills is in smooth engagement and transition with the bottom slope, and the height from the corresponding bottom slopeincreases gradually in the water flow direction; the lower surface of each of the diffuser sills is fixedly connected with the corresponding bottom slope, one side wall of each of the diffuser sills is fixedly connected with the side wall of the corresponding inflow section, the width of each of the diffuser sills in the direction of the water flow graduallydecreasesin a linear mode until decreases to zero at the tail end of the inflow section, thus a flared groove is formed in the middle of the tail end of the inflow section. According to the stilling pool with the continuous incident angle, the mixing effect of water body in the stilling pool and the energy dissipation efficiency of the stilling poolcan be greatly improved.

The invention discloses a rare earth doped tungsten bronze structural ceramic material with high energy storage property, the structural formula of the rare earth doped tungsten bronze structural ceramic material is (Sr < 0.53-0.15 x > Ba < 0.47 > Gdx) < 1-y > REyNb2O6, the value of x is 0-0.1, and the value of y is 0.01-0.08. The preparation method comprises the following steps: mixing BaCO3, SrCO3, Gd2O3, RE2O3 and Nb2O5, carrying out ball milling, drying and pre-sintering, and carrying out granulation, tabletting, glue discharging and sintering on the pre-sintered powder. Abnormal growth of non-equiaxed grains of the tungsten bronze structure ceramic is inhibited through an A-site rare earth doped ceramic system, a compact ferroelectric energy storage material is formed, the relaxation characteristic is increased, energy dissipation under an electric field is reduced, in addition, elements such as Bi, Na and K which are easy to volatilize in the high-temperature sintering process are not involved in the ceramic composition, integration of devices is easy, and the application range is wide. And the requirements on equipment, manpower and sites are low.

The invention provides a fish-spear type electrolytic bath electrode. The electrode comprises a positive electrode and a negative electrode, wherein the positive electrode and the negative electrode have the same outline structure and are fish-spear-shaped; either the positive electrode or the negative electrode consists of an electrode contact, forked needles and a conductor circular plate; the forked needles are distributed on the electrode contact in the form of fish spears; each forked needle is provided with one conductor circular plate; each conductor circular plate on each forked needle is vertical to the forked needle; all conductor circular plates are coplanar; and the positive and negative electrodes are arranged in an electrolytic bath oppositely. The electrode has the advantages of effectively electrolyzing solution, preparing needed industrial substances, optimizing electric field distribution in the electrolytic bath, needing lower electrolytic voltage, reducing the energy consumption of the electrolytic bath and improving the electrolytic efficiency of the electrolytic bath.

The invention discloses a suction mechanism for laser welding. The suction mechanism comprises a suction mounting seat and a suction nozzle arranged on the suction mounting seat; the suction mountingseat comprises a vertical mounting plate, a sliding mounting plate and a suction nozzle mounting seat; the vertical mounting plate extends in the vertical direction; the sliding mounting plate is connected with the side surface of the vertical plate mounting in a sliding manner, and the sliding mounting plate can slide back and forth, relative to the vertical mounting plate, in the vertical direction so as to be changed between a natural state and a buffer state; the suction nozzle mounting seat is fixedly arranged on the sliding mounting plate; and a suction nozzle mounting cantilever is fixedly connected to the side face of the suction nozzle mounting seat, the suction nozzle mounting cantilever horizontally extends outwards from the side face of the suction nozzle mounting seat, and thesuction nozzle is detachably arranged on the suction nozzle mounting cantilever. According to the suction mechanism, related parts are few, and the structure is compact, so that the mounting space, in the radial direction and the longitudinal direction, of the whole structure is kept small enough, and the accuracy of sucking a workpiece to be welded is favorably improved.

The invention relates to a plasma cleaning machine, and belongs to the technical field of plasma cleaning. The plasma cleaning machine comprises a box body and a box door, wherein the interior of thebox body is divided into a plurality of cleaning cavities by insulation isolation devices, a storage frame is arranged in each cleaning cavity, each storage frame is made of a conductive material andcomprises a positive electrode conductive half part and a negative electrode conductive half part, and the negative electrode conductive half parts are electrically connected with the box body; and the positive electrode conductive half parts are electrically connected with a positive electrode of a power supply outside the box body and do not make contact with the negative electrode half parts, the storage frames are divided into a plurality of storage cavities by the positive electrode conductive half parts and the negative electrode conductive half parts, the box body and the box door are provided with gas guide devices, and the gas guide devices can supply gas to and exhaust the gas from each storage cavity. The plasma cleaning machine is simple and reasonable in structure, high in space utilization rate, convenient to use and maintain, uniform in gas distribution and good in gas ionization and cleaning effect.

The invention relates to the field of voice signal processing and intelligent control, in particular to a voice control intelligent toy car system based on TMS320VC5509A. The difference is as follows:the system comprises a voice recognition module which is an LD3320 chip, template keywords are preset in the LD3320 chip, the voice recognition module performs spectral analysis on input voice signals through an ARS voice recognition technology to extract parameters representing voice features in the input voice signals, then the parameters are compared with the template keywords, and the keywordwith the highest matching degree is found out to serve as a voice recognition signal to be output; the system also comprises a DSP processor, which is a DSP chip of TMS320VC5509A, the input end of the DSP processor is connected to the voice recognition module, and the DSP processor is used for converting the voice recognition signal output by the voice recognition module into a control signal andsending the control signal to a control object of a toy car so as to execute a corresponding action command. The system overcomes the defects of a man-machine interaction plate of an existing toy car, achieves voice control, and is high in performance and low in power consumption.

The invention discloses a heat recovery heat supply oxygen making unit for a high and cold anoxic environment. The oxygen making unit comprises an oxygen making module and a heat supply module. The oxygen making module comprises an air compressor, a multi-stage high pressure filter, a three-phase heat exchanger, a surge tank, two adsorption towers, an oxygen storage tank and a humidification bottle. The multi-stage high pressure filter, the three-phase heat exchanger and the surge tank are sequentially connected behind the air compressor. A stop valve and an electromagnetic valve are sequentially arranged between the surge tank and the adsorption towers connected in parallel. A pressure equalizing valve and two throttling valves are sequentially connected in parallel between the two adsorption towers and the oxygen storage tank. A one-way valve is arranged between each throttle valve and the oxygen storage tank, and a pressure limiting valve and a flow meter are arranged between the oxygen storage tank and the humidification bottle. The heat supply module is connected with the oxygen making module. A oxygen making system and a heat pump system are fully combined, oxygen supply, humidification and heating can be achieved at the same time, adverse reactions caused by low-pressure oxygen deficit, cold drying and the like in high-altitude areas can be reduced, energy dissipation is reduced, heat recovery and utilization are achieved, and the actual requirements of high-altitude areas are met.

The invention discloses a laser welding suction nozzle and a laser welding gun. The laser welding suction nozzle comprises an installation section, a suspension section and an extension section, wherein one end, at the installation section, of the suspension section integrally joins the installation section and extends downward from the installation section; the extension section is mounted to thebottom of the suspension section; the outer periphery of the extension section at least partially protrudes out of the outer side of the suspension section to form an outer convex part; a light-transmitting hole penetrating through the upper surface and the lower surface of the outer convex part is formed in the outer convex part; and the light-transmitting hole is open at the outer side of the outer convex part to separate the outer convex part into a suction block and a pressing block. According to the laser welding suction nozzle and the laser welding gun, the light-transmitting hole is arranged on the suction nozzle without additionally reserving a laser avoiding station on the side of the suction nozzle, so that a transverse installation space of the suction nozzle is kept small enough, a laser beam is injected over a workpiece via the light-transmitting hole, the energy dissipation of the laser beam caused by deliberately prolonging a laser light path is reduced, and the weldingefficiency and the welding quality are improved.

The invention discloses an energy-saving gas stove support with arc-shaped ribs. The energy-saving gas stove support comprises an annular body with support legs, the arc-shaped radiation ribs which are radially arranged on the annular inner edge of the body and are depressed to the bottom end of the body and an energy-gathering net cover connected at the other ends of the radiation ribs. The invention aims at reducing the energy consumption of a gas stove and reducing the using cost. Through the energy-saving gas stove support with the arc-shaped ribs disclosed by the invention, by adopting the energy-gathering net cover arranged in the support and utilizing the heat-gathering performance of the metal net cover, the heat radiation of the gas stove in the using process is effectively prevented, the heat efficiency of the gas stove is improved, the using cost of the gas stove is further effectively reduced, the energy consumption in daily life is reduced and the living cost is reduced.