1601results about How to "Stable working condition" patented technology

The invention discloses an unmanned perception based unmanned aerial vehicle route planning method for rapidly planning the vehicle driving route. According to the invention, based on the unmanned flight perception system, road video images around a target vehicle are photographed by utilizing an unmanned flight to be sent to a ground station; the ground station receives the video images and processes the video images so as to obtain the vehicle and road messages, route planning is carried out according to the vehicle position, and the route is transmitted to the unmanned aerial vehicle; and a computer module of the ground station calculates a flight control signal to control the unmanned aerial vehicle to follow the vehicle to proceed, and corrects the route in real time. According to the invention, based on an unmanned flight platform, the operation state is stable; and the road environment around the vehicle is photographed from a great height, the coverage area is wide, and the observed road traffic information is distinct and clear, so that the road distribution condition and the traffic condition around the target vehicle can be obtained rapidly, the reasonable route planning can be obtained, the route is more precise, and the road condition analysis is more timely and accurate.

The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.

The invention provides a deep learning-based emotion recognition method and system. The system includes a face image acquisition module, a deep learning-based facial expression recognition module and a facial expression early warning module. The facial images of employees are acquired when the employees punch in every time; the emotions of the employees are analyzed through adopting a deep learning algorithm-based facial expression analysis algorithm, and the emotions are compared with historical emotions; and when the emotions are abnormal, the system sends alarm information to relevant personnel. According to the deep learning-based emotion recognition method and system of the present invention, the deep learning algorithm is adopted to perform emotional analysis on the employees, and therefore, deep-level humanistic care can be provided for the employees.

The invention provides a process and device for carrying out stage dry distillation on oil shale under the state of full recycle, with the gas as the heat carrier. The oil shale is divided into three different sizes (such as 0-6mm, 6-20mm and 20-50mm) through crushing and screening, and the oil shale is firstly dried and heated to the temperature between 50 DEG C and 150 DEG C by the waste smoke exhausted from gas heating furnaces and then enters into the different sizes of furnaces for dry distillation to undergo dry distillation. After being treated by water spraying and an indirect cooling tower, a rotary trapper and an electric trapper for oil collection, the dry distillation oil and gas undergo oil-gas-water separation, and after separation, the oil enters into a storage tank, the water enters into a circulating water tank and the first part of gases serves as the heat carrier and is recycled, the second part of gases is used as the fuels for the heating furnaces and the third part of gases is used as the fuel gases for power generation.

The invention discloses a shift register unit, a grid driving circuit and a driving method thereof, relates to the technical field of display, and solves the problems that great charging of pixels cannot be guaranteed due to long reset time of a grid driving signal. According to the shift register unit, an input module is used for pulling up voltage of a pull-up node under the effect of an input signal in the input phase; an output module is used for outputting the grid driving signal under the effect of a clock signal and further pushing up voltage of the pull-up node in the output phase; the output module is used for pulling down voltage of the output end of the output module to reference voltage under the effect of the clock signal in the reset phase; and a first pull-down control module is used for regulating voltage of the output end of the output module to grid turn-off voltage from reference voltage under the effect of a first pull-down control signal. The shift register unit is used for providing the grid driving signal.

The invention relates to a full-automatic intelligent cleaning device of photovoltaic power station modules, in particular to a high-efficiency dust-cleaning device for various long or short square photovoltaic modules of a large-scale photovoltaic power station. The full-automatic intelligent cleaning device of the photovoltaic power station modules comprises a cleaning car, an electromechanical braking system and an intelligent control system. The electromechanical braking system comprises a power supply unit, a support arm unit and a cleaning unit. The electromechanical braking system has the functions of cleaning and dust-cleaning with a plurality of degrees of freedom according to the surfaces of the photovoltaic modules. The intelligent control system comprises a perception unit, a processing unit and a remote control unit and can achieve full-automatic, real-time and remote controlled high-accuracy control of the cleaning car and a cleaning mechanism. The full-automatic intelligent cleaning device of the photovoltaic power station modules enables the cleaning device to be intelligentized, can carry out one-time high-accuracy dust-cleaning to the various long or short square under different road conditions, is safe, stable, reliable and full-automatic, and effectively solves the technical problems that cleaning is excessively dependent on manpower to supervise and the cleaning efficiency of the large-scale photovoltaic power station is low in the prior art.

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

The invention relates to an intelligent video image diagnosis system, which comprises a video data access interface used for accessing real-time video images transmitted by monitoring points, an intelligent image analysis unit used for intelligent analysis of the real-time video images in a polling mode, an abnormal phenomenon standard comparison unit used for comparing with standard units for abnormal phenomena of various video images to judge the quality of the video images, and a fault alarm unit used for generating video image fault alarm information and informing a system administrator when the video images are determined to have problems. The invention also relates to an intelligent video image diagnosis method. Intelligent image analysis is fused in the video image monitoring process of the monitoring points, the low-efficiency manual mode is changed into an efficient intelligent video image diagnosis mode, the fault alarm information is timely generated and the system administrator is informed of the fault alarm information, so that the monitoring points can work stably and normally and the social and personnel safety is ensured.

The invention discloses a hub-motor-driven automobile electromechanical fluid redundant braking system and a control method. The control method of the braking system comprises the steps that is a hubmotor is utilized preferentially to conduct regenerative braking, an electro-mechanical-type braking system is used for traveling braking compensation and parking braking, a hydraulic braking system is used for failure compensation, and the three sets of braking systems are synergetic; and current automobile condition information and driver operation are obtained through an automobile controller,the driving intention is recognized, the automobile stability state is monitored, the road surface condition and the power battery state are synthesized, the braking mode is judged, the total brakingtorque demand is solved, braking torques of four wheels are reasonably distributed, and a hub motor controller, an electro-mechanical-type braking system controller and an electric mechanical brakingbooster are synergetic to conduct braking control to reach the braking target jointly and guarantee traveling stability. The hub-motor-driven automobile electromechanical fluid redundant braking system and the control method can achieve efficient braking energy recovery and four-wheel active-distribution-type braking, and have the advantages of being high in braking capacity, high in sensitivity,quick in response, high in safety, high in reliability and the like.

The invention discloses a hydraulic power pulse oil displacement experimental facility and an experimental method thereof. The experimental facility comprises a core clamping device, an annular pressure supply device, a hydraulic power pulse wave generating device, a water storage tank and an oil storage tank which are connected with the liquid inlet of the core clamping device by virtue of a water pipeline and an oil pipeline as well as a liquid container which is connected with the liquid outlet of the core clamping device; wherein the water pipeline and the oil pipeline are all provided with an intermediate container, a pumping device used for generating high pressure liquid flow and an energy storage tank. The experimental method includes the following steps: firstly, oil displacementexperiment is carried out under the condition that no hydraulic power pulse is added; secondly, oil displacement experiment is carried out while frequency and amplitude hydraulic power pulse wave of core are replaced, and meanwhile hydraulic power pulse auxiliary chemical oil displacement experiment is completed; thirdly, data processing is carried out. The invention has reasonable design, mounting convenience, simple operation and good simulation effect, can improve efficiency of oil displacement by water and crude oil recovery ratio, and experiment of hydraulic pulse wave oil displacement and hydraulic pulse wave auxiliary reservoir core oil displacement by water can be realized.

The invention relates to a vehicle environment sensing system and method based on an unmanned plane, and the system and method are used for quickly acquiring the road environment information around a vehicle. The sensing system comprises the unmanned plane and an earth station, the unmanned plane id connected with the vehicle through a mooring rope, the road surface is shot by the unmanned plane, and a video image is transmitted to the earth station; the earth station is arranged in the target vehicle, the earth station can process the video image to obtain the vehicle environment information, and the earth station also can calculate the flight control parameter and send the parameter to the unmanned plane to make the unmanned plane and the vehicle move together. The sensing method is based on the sensing system, the unmanned plane takes off and hovers above the vehicle, the unmanned plane establishes a communication for sensing the environment and transmits the video image to the earth station, the earth station processes the video image, calculates the vehicle environment information and transmits the information to the vehicle, and the earth station calculates the flight control parameter and transmits the parameter to the unmanned plane. According to the invention, the system can perform the wide area observation in the direction vertical to the vehicle plane direction, the coverage is wide, the road environment information around the target vehicle can be easily sensed, and the distance between the objects in the image can be precisely calculated.

A filter-type gas separating-cleaning apparatus with quickly moving filter layer features that its filter cylinder rotating at high speed is composed of external filter net, supporting posts, internal filter net, shaft sleeve, shaft disk and supporting rings, and the gas containing solid particles and / or liquid drops is filtered by said filter cylinder. Its advantage is use of big-mesh filter material to remove fine solid particles and / or liquid drops, resulting in high filter speed, and easy cleaning.

A fresh air unit, including a chassis and a heat pump device, wherein the chassis is composed of mutually independent fresh air passages and exhaust air passages, the fresh air passage includes a fresh air inlet and a fresh air outlet, and the exhaust air passage includes an exhaust air inlet and an exhaust air outlet; A heat pump device is composed of a first compressor, a first four-way valve, a first heat pump first heat exchanger, a first throttling device, and a first heat pump second heat exchanger sequentially connected through a refrigerant pipeline; the fresh air unit It also includes a heat recovery device. The heat recovery device is a separate gravity heat pipe, a separate liquid pump circulation heat recovery device, an integral heat pipe, etc. The first heat exchanger of the heat recovery device is located at the fresh air inlet of the fresh air channel and the first heat pump first. Between the heat exchangers, the second heat exchanger of the heat recovery device is located between the exhaust inlet of the exhaust channel and the second heat exchanger of the first heat pump. The invention has the characteristics of efficient recovery of exhaust air heat, stable operating conditions, precise control of fresh air outlet parameters, energy saving and the like.

The invention discloses a consecutive reaction apparatus for moisture sludge through anhydration and pyrolysis under microwave irradiation as well as a method thereof. The condensation comprises a sludge warehouse, a stirrer, a hopper feeder, a sludge-shaped controller, a belt sender, a power control microwave irradiation device, a microwave pyrolysis reaction chamber, a pressure sensing controller, a blower fan, a condensation heat exchanger, a scraper plate separator, an oil-water separating device, a liquid dredging groove, a coke storage tank, a product oil tank, a product gas tank, a nitrogen generator, a coke crusher, a sludge water pot and a gas shunting plate. According to the invention, microwave material internal heating characteristic can be fully used for reducing heat radiation loss, moisture sludge is directly performed with anhydration and pyrolysis to obtain the cracking oil, combustible gas and solid coke; heat recovery of the product gas and auxiliary microwave heating characteristic of the products residue are fully used for reducing the operation cost, and sludge pyrolysis efficiency and products quality can be increased. The apparatus has the advantages of simple structure, small volume, reasonable design and convenient market popularization, and is suitable for industrial application of microwave sludge continuous pyrolysis.

The invention discloses a nickel-and-molybdenum based bimetallic carbide loaded on nickel foam and a preparation method and application thereof. Nickel nitrate and ammonium molybdate are adopted as a nickel source and a molybdenum source correspondingly, glucose is adopted as a carbon source, and the bimetallic carbide Mo6Ni6C is grown on the surface of the nickel foam in situ through a hydrothermal and high-temperature carburizing method. The method is easy and convenient to implement, the raw materials are easy to obtain, the preparation cost is low, the reaction period is short, and repeatability is high. The material has the excellent hydrogen evolution performance in the field of electrocatalytic decomposition of water. When the overpotential of hydrogen evolution is -51 mV in an acid electrolyte solution, the electric current density can reach 8-12 mA / cm<2> and is not decreased obviously under the stable work for more than 200 hours; and at the same time, when the overpotential of hydrogen evolution is -34 mV in an alkali electrolyte solution, the electric current density can also reach 8-12 mA / cm<2> and is not decreased obviously under the stable work for more than 300 hours. The nickel-and-molybdenum based bimetallic carbide loaded on the nickel foam not only can be directly used as a working electrode of electrocatalytic hydrogen evolution, but also can be used in the fields of the chlor-alkali industry, the water electrolysis process, solar energy water electrolysis and hydrogen manufacturing and the like.

The invention provides a planar antenna capable of switching wave beams for omnidirectional scanning within a horizontal range. The antenna comprises an insulated substrate with a feed input port, a metallic grounding plate which is arranged on the lower surface of the substrate, emitters which are arranged on the upper surface of the substrate, control circuits of the emitters and a feed patch. By taking the feed patch as a center, the insulated substrate is equally divided into six areas; a control circuit is arranged in each area; one end of each control circuit is connected with the feed patch in the center through a blocking condense,r and the other end of each control circuit is connected with one emitter through a feeder; therefore, a relatively independent unit antenna is formed in each area. By switching the wave beams to cover the plane of the entire antenna, the whole coverage on the plane of the antenna is realized; since parameters except the radiation direction of each wave beam in the working state are consistent, the working state of the antenna provided by the invention is stable.

The invention belongs to the field of pen manufacturing and in particular relates to a plugging device of a pen head and a pen holder. The plugging device comprises a clamping mechanism for fixing the pen head and a pen holder pushing mechanism for pushing the pen holder; the pen head and the pen holder are horizontally arranged in the pushing direction of the pen holder pushing mechanism when being assembled. By using the plugging device, the assembling quality and the production yield rate can be guaranteed while the plugging assembling efficiency of the pen head and the pen holder is improved; and the apparatus can run stably and reliably.

The invention discloses a method for pyrolyzing municipal sludge and preparing biological oil and active carbon simultaneously, which can obtain high-quality biological oil and active carbon simultaneously and solves the problem that the conventional sludge pyrolysis method only can obtain a single recycled product. In the method, sludge (A) enters a pyrolysis reactor (1) through a vane feeder (1-1); fluidized wind (B) enters the pyrolysis reactor (1) through a wind chamber (1-2) and a wind distribution plate (1-3); a cyclone separator (2) catches and collects fallen pyrolytic carbon (C) and returns the pyrolytic carbon (C) to the pyrolysis reactor (1) for circulation through a blank pipe (3), a material feedback device (4) and a material returning pipe (5); the pyrolytic carbon (C) becomes active carbon (D) after repeated circulation; and then, the active carbon (D), together with pyrolytic gas (E), enters a ceramic filter (8) and is caught and collected by the ceramic filter (8); the pyrolytic gas (E) discharged by the ceramic filter (8) enters a condenser (9); and the lower part of the condenser recovers biologic oil (H) and discharges noncondensing gas (I).

The invention discloses a sea bottom natural gas hydrate gas lift mining method and a sea bottom natural gas hydrate gas lift mining device. Gas is injected into a gas injection pipeline from a sea surface, so that resultant force of force applied to a diaphragm by the injected gas and force applied to a valve ball by liquid in a gas recovery pipeline is greater than elastic force of a spring, a valve rod drives the valve ball to leave a valve seat, the injected gas is injected into the gas recovery pipeline, and the density of the liquid in the gas recovery pipeline is reduced; and the gas recovery pipeline forms sucked water flow at the inlet of the gas recovery pipeline by using a difference of pressure outside and inside the pipeline, and natural gas hydrate particles in a sea bottom natural gas hydrate and silt mixed layer are sucked and flow into a separation and storage system on a sea surface gas recovery platform or a ship, so that sea bottom natural gas hydrates are continuously mined, the required quantity of the injected gas is small, operating cost is low, the method and the device are suitable for mining low-abundance natural gas hydrates dispersed on a sea bed, and the environment is not influenced. The device has a simple structure and a stable working state.

The invention discloses a dualistic superposed wave reinforced oil displacing experiment device and an experiment method. The dualistic superposed wave reinforced oil displacing experiment device comprises an artificial resonance wave test table, a rock core holder, a ring-pressure supplying device, a hydraulic impulse wave generator, a high-pressure water tank, a high-pressure oil tank and a liquid container, wherein the hydraulic impulse wave generator is arranged between a liquid outlet of the high-pressure water tank and the rock core holder, the high-pressure water tank and the high-pressure oil tank are connected with a liquid inlet of the rock core holder through a water pipeline and an oil pipeline, the liquid container is connected with the liquid outlet of the rock core holder, middle transition containers are respectively arranged on the water pipeline and the oil pipeline. The experiment method comprises the following steps of: firstly, under the condition of no dualistic superposed waves, carrying out a reinforced oil displacing experiment; secondly, replacing a rock core and carrying out the reinforced oil displacing experiment on a plurality of rock cores under two wave field conditions of artificial resonance waves and hydraulic impulse waves which have different frequencies and amplitudes; and thirdly, processing data. The method has the advantages of rationaldesign, convenient distribution, complete functions, simple and convenient operation and good simulation effect and can test the final recovery ratio and the residual oil saturation of different rockcores under the conditions of two wave fields.

The invention discloses a law enforcement and case handling system based on the wireless video transmission technology. The law enforcement and case handling system based on the wireless video transmission technology comprises a plurality of mobile control terminals, a wireless access unit, a network switching unit, a central control unit, a decoding unit, an image mosaic processing unit and a display unit. The mobile control terminals are connected with the network switching unit through the wireless access unit to achieve the pairing setting of users on the input-output channels of various types of video signals and the display control operation of the users on image mosaic schemes in a network; the network switching unit is used for receiving the various types of video signals in the network and converting the video signals through the decoding unit into digital high-definition video signals identifiable to the image mosaic processing unit; the display unit is connected with the image mosaic processing unit and used for displaying the image display effects selected by the users in real time. The law enforcement and case handling system based on the wireless video transmission technology can achieve display of multi-channel videos on a large-size high-definition mosaic display screen in various combination modes, improve the screening efficiency and further greatly improve the working efficiency of law enforcement and case handling.

The invention provides a particle--reinforced AlSiTi (aluminum-silicon-titanium) alloy cylinder sleeve which is composed of aluminum alloy and a certain content of Ti and Si. In the process of tubular casting solidification, the AlSiTi particles and partial Si particles dissolved from the aluminum melting solution can move outwards under the action of centrifugal force and finally generate a segregation layer of which a great quantity of primary AlSiTi particles and Si particles segregate on the outer layer in the tubular casting, particle primary crystal Si particles can move inwards and segregate in the inner layer, and the middle part is a substrate layer without particles. After the turning process is carried out on the inner layer and the outer layer of the tubular casting semifinished piece, an outer layer containing AlSiTi and Si particles with a high volume fraction can be left, thus the particle-reinforced aluminum alloy cylinder sleeve can be obtained. The aluminum cylinder sleeve and the aluminum cylinder body are combined and molded by pressure casting and then machined and assembled to obtain an all-aluminum internal combustion engine. The particle-reinforced AlSiTi alloy cylinder sleeve prepared by the method provided by the invention has light weight, high percentage composition in the particle volume, excellent wear-resisting property and high temperature resistant property and can improve the working efficiency of the engine.

The invention discloses an artificially resonant wave strengthened oil displacement dynamic simulation experimental device and an experimental method. The experimental device comprises an artificially resonant wave test bed, core grippers fixed on the artificially resonant wave test bed, thermotanks distributed outside the core grippers, an intermediate transitional water-delivery container, an intermediate transitional oil delivery container, a water storage tank, an oil storage tank, and liquid containers connected with liquid outlets of the core grippers. The experimental device comprises the following steps of: 1, performing an unartificially resonant wave dynamic simulation experiment; 2, replacing cores and performing an artificially resonant wave dynamic simulation experiment on the plurality of cores under the artificially resonant wave vibration conditions of different frequency and identical vibration acceleration; and 3, performing data processing. The device and the methodensure rational design, convenience of distribution, use and operation, perfect functions and good simulation effect; and the single-phase and two-phase seepage characteristics of the cores, the saturation of residual oil and the final oil recovery factor can be tested under the conditions of artificially resonance waves and different displacing mediums.

An embodiment of the invention provides an apparatus and a method for inhibiting intensity noise in an optical signal. The method comprises the following steps of: carrying out sampling on an optical signal output by an intensity modulator to obtain a voltage signal; demodulating the voltage signal; and generating a control signal according to a demodulation result. The control signal includes a power control signal for adjusting power of the optical signal and a modulating square wave signal for adjusting a working point of the intensity modulator. The intensity modulator modulates the powerof the received optical signal according to the received power control signal in the control signal, and adjusts the working point of the intensity modulator according to the received modulating square wave signal in the control signal, so as to maintain the working point of the intensity modulator stable. The embodiment of the invention can realize effective inhibition of the intensity noise in the optical signal while ensuring the working point of the intensity modulator stable.

The invention discloses an SOI LDMOS device with an extending gate structure, and belongs to the technical field of semiconductor power devices. According to the SOI LDMOS device, the extending gate structure extending from a polysilicon gate to a drain electrode is introduced into the surface of a drift region of a conventional SOI LDMOS device. A PN junction which is reversely biased when the device is in the on state is introduced into the extending gate structure to reduce a leakage current. The extending gate structure is characterized in that on one hand, when the device is in the on state, a majority carrier accumulation layer is sensed on the portion, close to extending gate media, of the surface of the drift region, an ultralow resistance channel is provided for the on-state current, the specific on resistance of the device is accordingly and remarkably reduced, and the specific on resistance does not depend on the doping concentration of the drift region; on the other hand, when the device is in the off state, distribution of an electric field in the drift region is adjusted through the extending gate structure, and the voltage resistance of the device is accordingly improved. In addition, the vast majority of the on-state current flows through the low-resistance channel of the charge accumulation layer, temperature distribution of the SOI LDMOS device is accordingly even, and the SOI LDMOS device is stable.

The invention provides an air conditioner air supplying control method and a computer storage medium. The air conditioner air supplying control method comprises the steps that an air supplying commandof a user is obtained, and the swing directions of transverse swing blades and vertical swing blades are determined; a micropore slide plate is controlled to open, and the transverse swing blades andthe vertical swing blades act in the determined swing directions; the environment temperature of the space where an air conditioner is located is detected, the operation frequency of a compressor ofthe air conditioner is determined, and the compressor is driven to operate for the first preset time according to the determined operation frequency; and the operation frequency of the compressor is controlled to reduce, and after the operation frequency of the compressor is reduced for the second preset time, the micropore slide plate is controlled to close so that the air conditioner can supplyair through a plurality of micropores. According to the scheme, the situation that condensed water and even the frosting phenomenon occur due to too much cold energy generated inside can be avoided, the air supplying control method is more reasonable, the effect that supplied air is cool instead of being cold and is hot rather than being dry can be achieved in the micropore air supplying mode, andthe comfort degree of the user is greatly improved.

The invention relates to a full-hydraulic reamer applied to the fields of drilling and reaming operation for oil and gas exploration and development. A stepped cylinder is arranged on the outer wall of a mandrel piston, the lower end of the mandrel piston is in threaded connection with a mandrel nipple, an annular sealed limit ring is arranged in an annular space between the mandrel nipple and the shell, a mandrel cap is sleeved on an outer wall at the lower end of the mandrel nipple, a main nozzle and a main nozzle gland are fixed in a stepped central hole in the mandrel cap, a bypass hole is arranged on the wall of the mandrel cap, a lower joint is fixed at the lower end of the shell, a mandrel seat is fixed at the upper end of the lower joint, three rectangular windows are uniformly distributed on the shell wall along the circumferential direction, rectangular reaming cutter wings are arranged in each rectangular window through a cylindrical pin, and an incomplete gear is arranged at the inner end of each reaming cutter wing and engaged with a rack on a normal triangular prism in the middle of the mandrel piston. After a drill string is rotated to increase the pump displacementand open the cutter wings, reaming can be started, after the reaming is finished, the reaming cutter wings are withdrawn after a ball is placed, and drilling is normally continued after the reaming is finished, therefore drilling time is saved.

The invention provides a method for decreasing laser welding pores, and relates to the technical field of laser welding. The method for decreasing the laser welding pores comprises the steps of (1) placing two metal to-be-welded parts in a horizontal butt joint manner to form a to-be-welded workpiece; (2) clamping and fixing the two ends of the metal to-be-welded workpiece; (3) preheating the metal to-be-welded workpiece through laser beams; and (4) starting a control switch, introducing a protective gas, igniting electric arcs for 1 s to 2 s, emitting laser, combining laser emitted by a laser A and a laser B into one laser beam, and moving a high pressure air rifle which injects acetone together with the laser A and the laser B. According to the method, a device utilized in the method comprises the two lasers, firstly, the material surface is subjected to preheating treatment, an oxide film generated on the surface is scrubbed through acetone, and then, the two lasers emit the two laser beams to melt the material for welding, so that metal weld joint porosity is obviously decreased, and porosity of 8% to 10% during laser welding is decreased to zero.

The invention relates to an induction welding method for an aluminum water-cooling base plate and a stainless joint, which mainly comprises the following steps: processing the stainless joint and thewater-cooling base plate by sodium hydroxide and sulfuric acid solution and drying; bending a zinc-aluminum alloy flux-cored welding wire with a melting point of 420-480 DEG C into a circle and placing the zinc-aluminum alloy flux-cored welding wire to the root part of the stainless joint exposing out of the end surface of the water-cooling base plate and the chamfering position of a screw hole ofthe end surface of the water-cooling base plate; connecting an induction coil of the water-cooling base plate with one induction heating power supply and placing the water-cooling base plate into theinduction coil; connecting an induction coil of the stainless joint with the other high frequency induction heating power supply and placing the stainless joint into the induction coil. The temperature in the welding position of the water-cooling base plate rises to 450-480 DEG C and the temperature in the welding position of the stainless joint rises to 500-550 DEG C during welding. The invention more ideally solves the problem of welding two different material components of aluminum and stainless steel; welded brazing filler metal has full and even appearance and completely fills a seam andcan lead the welding position to be sealed permanently; and the stable working state of an IGBT power module is ensured.

The present invention discloses a method for implementing the middle connection tensioning of cables and a device thereof. Tool cables are arranged at the sides of the middle sections of the cables. The tool cables and cables are connected into a whole at both ends of each tool cable through opening flat anchors and corresponding anchor fixing devices. One end or two ends of each toot cable are tensioned, and connectors are used for connecting (only rope force is measured without connection) after the tensioning is in place. After the tensioning force of the tool cables is unloaded, the cables suffer tensioning force to realize the connection tensioning of the cables. A butting joint tensioning device avoids tensioning anchor fixing problem of two-end tensioning, provides a new thinking path for the middle tensioning of the cables, and solves a technical problem that the middles of traditional cables are only connected, and can not be tensioned. The butting joint tensioning device can be used for the fields of the solution of the tensioning filament breakage of the cables, exact single cable testing equipment, external inherent stress reinforcement, assistant tensioning reinforcement, the realizing of super-long external rope connection tensioning, failure external rope complementarity reinforcement, connection tensioning for cutting off cable rope bodies and the like. The application fields of reinforcement cables are largely expended.