216results about How to "Has an effect" patented technology

The invention discloses a solar-air-geothermal multisource dual-machine heat pump heat supply and air conditioning composite system, relates to a heat supply, air conditioning and refrigerating composite system which takes solar energy, air and a ground source heat pump of a buried tube as cold and heat sources, and belongs to the technical field of building environment, equipment engineering and refrigeration engineering. The system comprises a solar thermal collector (1), the buried tube (3), a heat storage water tank (13), a heat storage / exchanger water tank (17), a control system, an end user (16) and the like. The invention provides a multisource dual-compressor heat pump system which takes the solar energy, geothermal energy and air as the cold and heat sources; and the system can supply heat in winter, refrigerate in summer and supply hot water for daily life all year round. Moreover, the overheat of the solar thermal collector in summer is avoided, so that the heat of the solar energy is stored in soil for use in the winter; and the system particularly has higher applicability in the area in which heat load in the winter is greater than cold load in summer.

The invention provides a multifunctional sanitation vehicle which can wash floor and do sweeping operation, pure dry-sucked operation and sprinkling operation. A spray pipe nozzle is arranged on a chassis, water in a water tank at the rear part is sprayed out from the nozzle by a water pump so as to clean the floor, sewage can be sucked back to the water tank by negative pressure provided by a fan and then used for cleaning the floor after depositing and being filtered, and disc brushes can be also arranged at two sides of the vehicle so as to sweep the floor; a dust suction disc can be arranged at the lower part of the chassis so as to suck rubbishes into a dust box through an suction port, fine powder then enters a fan impeller, dust and air are separated through the centrifugal force generated by the rotation of a fan impeller, separated air returns back to the dust suction disc through a pipeline and is then blown out from a blowing nozzle, and the duct then reenters the dust box and deposits under inertia effect. The multifunctional sanitation vehicle is provided with a front water spray nozzle, a rear water spray nozzle and other spray nozzles and can be used as a sparkler.

The invention discloses a phase detector based on a micro-mechanical silicon-based cantilever beam and a detection method. The phase detector comprises a silicon substrate (1), a source (2) and a drain (3), wherein the source (2) and the drain (3) grow on the surface of the silicon substrate (1) and are used for outputting saturation current; the source (2) is opposite to the drain (3); a cantilever beam anchor area (6) is arranged outside the source (2) or the drain (3); a gate oxide layer (4) is bridged between the source (2) and the drain (3); and a gate (5) is arranged on the surface of the gate oxide layer (4). The method comprises the following steps of: when direct current offset is loaded to a pull-down electrode (8) and a cantilever beam (7) is pulled down and contacted with the gate (5), simultaneously loading two microwave signals with the same frequency and certain phase difference to the gate (5); and filtering a high-frequency signal from the saturation current of the drain (3) through a blocking capacitor and a low-pass filter, and thus obtaining a current signal with phase difference information. The invention has the advantages of simple structure and convenience for measurement.

The invention relates to a preparation method of a hydroxyapatite / polylactic acid composite coating on the surface of medical magnesium alloy, which comprises the following steps of polishing a magnesium alloy basal body to remove an oxidation layer on the surface; carrying out acid etching pretreatment and neutralizing treatment on the magnesium alloy basal body; preparing transfer solution from sodium dihydrogen phosphate dihydrate and calcium nitrate terahydrate; preparing a biomimetic calcium-phosphate coating; dissolving polylactic acid in a chloroform solvent to prepare polylactic acid solution; immersing the prepared magnesium alloy / hydroxyapatite composite material in the polylactic acid solution, and coating the polylactic acid coating on the surface of the magnesium alloy / hydroxyapatite composite material by adopting the solution dip-coating method; and putting the magnesium alloy material for 2-3 days till chloroform in the polylactic acid solution is completely volatilized, thereby obtaining the composite material of which the surface of magnesium alloy is wrapped with the hydroxyapatite / polylactic acid composite coating. Compared with the prior art, the preparation method of the hydroxyapatite / polylactic acid composite coating on the surface of medical magnesium alloy overcomes the disadvantages of the single coating, and therefore, the corrosion resistance and the biocompatibility of magnesium alloy are obviously increased.

The invention relates to an unmanned aerial vehicle with an umbrella. The unmanned aerial vehicle comprises an unmanned aerial vehicle body and the umbrella, wherein the unmanned aerial vehicle body comprises a fuselage; four wings and four feet are arranged on the fuselage; a propeller and a driving motor are arranged on each wing, and each driving motor drives the corresponding propeller to rotate so as to realize ascending, descending and turning of the unmanned aerial vehicle; a connecting block is arranged on the fuselage in an outwardly raised manner relative to the fuselage; the umbrella comprises an umbrella cover and a bracket for supporting the umbrella cover; through a connecting part, the umbrella is mounted on the connecting block of the fuselage. Through the umbrella, the balance of the unmanned aerial vehicle during flying is ensured, and a crash condition caused by out of control of the unmanned aerial vehicle is avoided; meanwhile, the unmanned aerial vehicle is suitable for being used in a rainy environment; in addition, characteristics of the unmanned aerial vehicle body are fully utilized, the umbrella plays the common umbrella function in air, and the unmanned aerial vehicle body and the umbrella cooperate with each other, so that use requirements of people can be met.

The invention discloses a two-component sealant sewing agent. The two-component sealant sewing agent comprises a component A and a component B. The component A comprises, by weight, 30-100 parts of E-51 epoxy resin, 0.1-20 parts of E-44 epoxy resin, 1-50 parts of 133L epoxy resin, 1-20 parts of reactive diluents, 1-15 parts of thixotropic agents, 0.01-1 part of defoaming agents, 0-10 parts of coupling agents, 0.05-3 parts of ultraviolet absorbents, 0.001-1 part of purple blue-phase toner and 0.05-1 part of antioxidants; the component B comprises, by weight, 50-100 parts of curing agents, 0.1-20 parts of accelerators, 1-15 parts of thixotropic agents, 1-15 parts of body pigment and 3-20 parts of coupling agents. The two-component sealant sewing agent has the advantages that the prepared two-component sealant sewing agent is free of water absorption, blackening and mildew, is easy to clean and high in strength and brightness and is scrub-resistant, and oil pollution can be prevented by the two-component sealant sewing agent; the toughness of materials can be greatly enhanced, and the two-component sealant sewing agent is an environment-friendly edge sealing material with enhanced adhesive effects and the enhanced adhesive performance.

The invention discloses a polishing device for machining of a stainless steel pipe. The polishing device comprises a hydraulic telescopic cylinder, a motor, a fixed installing sleeve and a pipe body.The bottom of the hydraulic telescopic cylinder is fixed to an extending bottom plate. One end of the extending bottom plate is connected in a support seat. A side edge ball is fixed to the outer sideof an installing disc. The fixed installing sleeve is fixed to the left side face of the installing disc. The pipe body and the outer sides of first polishing rollers are attached to each other. A fixed table is fixedly welded to the top of the hydraulic telescopic cylinder. An extending table is connected to the right side of the fixed table. A second threaded rod penetrates through the fixed table to be connected with a bearing. The left side face of the installing disc is provided with a sliding groove. Side edge blocks are welded to the outer side of a movable installing sleeve symmetrically. According to the polishing device for machining of the stainless steel pipe, three parallel polishing rollers are arranged, the first polishing rollers are symmetrically installed at the upper and lower ends of the second polishing roller, and thus the inner and outer sides of the pipe body can be polished simultaneously.

The invention relates to the field of lithium ion batteries, and discloses a doped positive electrode material precursor and a preparation method and application thereof, and a doped positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing nickel salt, cobalt salt and manganese salt into a mixed salt solution; and respectively preparing a precipitant, a complexing agent and a doping element into solutions; (2) in an inert atmosphere, adding the mixed salt solution, the precipitant solution and the complexing agent solution into a reaction kettle for reaction; and (3) at different stages of the reaction, adding the doped element solution into the reaction kettle for n times for reaction to obtain a doped nickel-cobalt-manganese hydroxide, and washing and drying to obtain the doped positive electrode material precursor. Specific doping elements are added in different stages of wet synthesis, and the growth path and the internal structure of a precursor are directionally controlled; and sintering reaction is carried out on the precursor with the reinforced structure type and lithium salt to obtain a lithium ion battery positive electrode material finished product with relatively high particle strength.

Disclosed a method for one time extension forming the semiconductor laser and mode spot switch comprises following steps: (1), on the N type indium phosphide substrate, extending growing the N type indium phosphide breaker, a lower waveguide layer, a 2.4 ª–m indium phosphide space layer, a lower light-limited layer of active region, a compression strain quanta active region, a upper light-limited layer, a P type indium phosphide envelope, and a high doping P type indium gallium arsenide ohmic electrode contract layer; (2), utilizing the wet corrosion process to etch the upper carinate shape of laser and mode spot switch; (3) utilizing the auto-alignment process to etch the lower carinate shape; (4), growing the SiO2 insulating layer and opening a electrode window; (5) decreasing the substrate of extended plate to 100 ª–m, and manufacturing P / N electrodes to be scribed into the tube core of 250í‡600ª–m.

The invention relates to a plate-type vacuum membrane distillation evaporator and application thereof. The evaporator comprises a steam inlet side end plate on the left side and a steam outlet side end plate on the right side, wherein modules composed of a secondary steam channel sealing ring, a plate-type membrane frame, a feed liquid channel sealing ring, a heat exchange plate frame, a heater steam channel sealing ring, a heat exchange plate frame, a feed liquid channel sealing ring and a plate-type membrane frame are sequentially arranged and mounted between the steam inlet side end plate and the steam outlet side end plate from the left to right; and the multiple modules are sequentially connected to form a membrane stack by the secondary steam channel sealing ring. According to the application, multiple evaporators are combined into a high-efficiency and compact multiple-effect plate-type membrane distillation sea water desalination system. According to the plate-type vacuum membrane distillation evaporator and application thereof disclosed by the invention, gradient utilization ratio and thermal efficiency of membrane distillation vaporization latent heat are greatly improved, and the device has the advantages of compactness, high efficiency, high thermal efficiency, great water producing ratio and the like.

The invention relates to a direct current breaker. The direct current breaker comprises a main current-passing branch, an assistant electronic switch branch and a lightning arrester branch. A mechanical switch and a current conversion unit are connected to the main current-passing branch in series, and a current cutoff unit is connected to the assistant electronic switch branch. The direct current breaker is characterized in that the current conversion unit and the current cutoff unit are each composed of a full-bridge submodule, wherein two or more full-control type power switching devices are connected to each bridge arm of the full-bridge submodule in series, and the numbers of the full-control type power switching devices connected to the bridge arms of the full-bridge submodule are equal. The invention further provides two other direct current breakers. In one other direct current breaker, only a current conversion unit is composed of a full-bridge submodule; in the other direct current breaker, only a current cutoff unit is composed of a full-bridge submodule. According to the direct current breaker, the design structure is greatly simplified, busbar resources are saved, manufacturing cost is reduced, and demounting and mounting are convenient.

Disclosed a method for utilizing the dual-waveguide technology to manufacture the semiconductor laser and mode spot switch comprises following steps: on the N type indium phosphide substrate, sequentially extending growing the N type indium phosphide breaker, a lower waveguide layer, a space layer, a active region, and a thinner indium phosphide intrinsic layer, wherein, the indium phosphide intrinsic layer can prevent the oxidation of active region; removing the highest indium phosphide intrinsic layer, partly covering the laser with SiO2, and utilizing the wet corrosion process to etch the upper carinate shape of mode spot switch; utilizing the auto-alignment process to etch the lower carinate shape which comprises a lower waveguide layer, a space layer, a second growth P type indium phosphide coating layer, and a high doping P type indium gallium arsenide ohmic electrode contract layer; utilizing the SiO2 to partly cover the mode spot switch and etching the upper and lower carnate shapes again while the upper carinate shape comprises a active region, a P type indium phosphide coating layer and a high doping P type indium gallium arsenide ohmic electrode contract layer; and decreasing the substrate of extended plate to 100 ª–m, and manufacturing P / N electrodes to be scribed into the tube core of 250í‡500ª–m.

The invention relates to a solar hot air heating refrigeration hot water multipurpose device comprising a heat collecting module and a vacuum heat collecting pipe, wherein the outer layer of the heat collecting module is an insulating layer, a liner is arranged in the insulating layer, an inner core is arranged in the liner, the inner core is connected with a heat absorber through inner core holes symmetrically arranged at both sides of the inner core, the liner is hermetically connected with the vacuum heat collecting pipe through liner holes at both sides of the liner, the lower end of the inner core is closed, and the upper end of the inner core is connected with an induced air joint; the upper end of the liner is semi-closed, and the lower end of the liner is connected with a supply air joint; the induced air joint is connected with a draft fan, the draft fan is connected with a cold air outlet arranged in a room through an induced air pipeline, the supply air joint is connected with a blower, and the blower is connected with a hot air inlet arranged in the room through a supply air pipeline. The draft fan and the blower are used for circulating the air in the room, a heater arranged at a roof and the vacuum heat collecting pipe are used for heating the air, and the heated air heats up the room, thereby the device can perform a function of a radiator; meanwhile, the water in a hot water tank is also heated by a U-shaped circulating pipe, thereby the device can perform a function of a water heater.

The invention discloses a dough mixer good in dough mixing effects. The dough mixer comprises a first machine body, wherein a feed opening is formed in one end of the top of the first machine body, an auger device is fixedly connected to an inner cavity of the first machine body, a water tank is fixedly connected to the top end of the outside of the first machine body, a water inlet of a water pump is fixedly connected to the top end of the water tank, one end of a water pipe is fixedly connected to a water outlet of the water pump, and a spray head located at the top of the inner cavity of the first machine body is fixedly connected to the other end of the water pipe; a first fixing table is fixedly connected to one side of the outside of the first machine body, a first motor is fixedly connected to the upper surface of the first fixing table, and a first encloser located on the upper surface of the first fixing table is fixedly connected to the outside of the first motor; and an output shaft, penetrating through and extending to the inner cavity of the first machine body, of the first motor, is fixedly connected to one end of the auger device. According to the dough mixer disclosed by the invention, the spray head is arranged and used for sprinkling water in the water tank onto flour, so that the effect of enlarging the contact area of the flour and the water is achieved, and a uniform dough mixing effect is achieved.

The invention relates to electro-deposition gold nanoparticles, a preparation method and application thereof to the field of electrochemical sensors, which is used for increasing the reaction surface area of an electrode and quickening the rate of electronic transfer, and the method of in-situ electrochemical deposition of the gold nanoparticles can be used for rapidly and simply constructing a nano platform of the electrochemical sensors.

Information acquisition set is embedded into handset to constitute a terminal device. relevant information of anti false label is collected through the termnal and network, and address information of anti false server at remote side is displayed on screen. Anti false data through handset communication network are transferred to remote anti false server. The said server validates anti false data, and the validate result through handset communication network are returned back to terminal expressed in voice or text mode. New generaed anti false data are written into anti false label instead of anti false data just queried. Features are: low cost, easy of operation, high safety, suitable to many areas.

The invention relates to an integration method of electric adsorption modulation laser and mode speckle converter, which comprises: growing n-type indium phosphate buffer layer on the substrate; corroding the upper 1.1Q layer on the chip, to grow buffer layer; growing silica dioxide protective layer on the whole chip, and corroding the silica dioxide protective layer at two ends of mode speckle converter; pouring low-energy phosphate ion; growing the silica dioxide protective layer again; heating, keeping warm, anneal on the chip; corroding silica dioxide protective layer; using relative light etching plate to mask the laser and modulator, to form the upper ridge and lower ridge on the converter; growing p-type indium phosphate and indium gallium arsenic phosphate etching stop layer; etching ridge pilot structure; depositing medlin at two sides of laser and modulator; opening the electrode windows of laser and modulator; etching the electrode images on the laser and modulator to splash the P electrode and remove the P electrode; extending the substrate, and splashing n electrode; slicing the sample to form tubular chip.

The present invention relates to composite flocculant for water treatment and its preparation process. Technologically, the composite flocculant is prepared with titanium salt and industrial water glass as main material and sulfuric acid and sodium hydroxide as reaction assistants. The preparation process includes the following steps: diluting industrial water glass to SiO2 concentration of 2.5-4 wt %; adding 2-5 mol / L concentration NaOH solution to regulate pH value first to 7.0-9.0, stirring at normal temperature for 0.5-1 hr, regulating pH then to 11.0-12.0 to obtain basic polysilicic acid; dissolving titanium salt in water to obtain 0.5-2 wt % concentration solution, adding 15-25 wt % concentration sulfuric acid solution to regulate pH to 1.0-2.0 of the titanium salt solution; mixing the titanium salt solution and the basic polysilicic acid in the Ti / Si molar ratio of 1 / 3-1 / 0.3 at normal temperature; and reaction for 0.5-2 hr.

The invention provides a gradient pore diameter filtering membrane and a preparation method and application thereof. The gradient pore diameter filtering membrane is formed by electrostatic spinning of a high-molecular polymer material. The gradient pore diameter filtering membrane comprises a three-layer structure in close attachment. The outer-side two-layer structure has a pore diameter of 5-10 [mu]m and a thickness of 0.1-0.4 mm; the middle layer structure has a pore diameter of 0.5-5 [mu]m and a thickness of 0.3-0.6 mm, a hollow columnar liquid stopping filter membrane groove is installed between the lower end of a medicine liquid container and a transfusion hose, the inner diameter of the liquid stopping filter membrane groove is larger than that of the transfusion hose, the gradient pore diameter filtering membrane is installed in the liquid stopping filter membrane groove, and the cross section of the liquid stopping filter membrane groove is sealed completely. Flow of medicine liquid in an infusion apparatus is not affected, the medicine liquid can be timely terminated after the transfusion is over, and use safety and convenience of the automatic liquid stopping infusion apparatus are improved, so the whole transfusion process is safer and more convenient.

The invention provides a fruit protection bag which can be covered on fruits such as grapes, pears, apples and the like to protect the fruits from being damaged by birds or sunburn. The fruit protection bag comprises a bag main body made from a transparent or semitransparent thermoplastic resin film and a light scattering part made from thermoplastic resin, wherein at least two side edges of the bag main body except for an opening part are melted and covered; the whole surface is provided with a plurality of venting pores; and the light scattering part is folded on either side or two sides of the back surface of the bag main body and is melted and covered on two side edges close to the opening part in a stripping mode. The fruit protection bag further comprises a tightening installation part, and the tightening installation part consists of one of a raised tightening rope, a tightening installation piece or a tightening metal wire, wherein the tightening rope is melted and covered close to the opening part of the bag main body, is used for tightening the bag main body on a support branch part, is provided with a clamp bulge and is made from thermoplastic resin; the tightening installation sheet is made from the thermoplastic resin; and the tightening metal wire is covered by the thermoplastic resin. The light scattering part is formed by mixing the thermoplastic resin with one of white colorant, pearl colored colorant or metallic powder or printing or coating on a film.

The present invention provides an inspection seal structure. It includes corrugated pipe, said corrugated pipe includes working corrugated pipe and seal corrugated pipe, two ends of said working corrugated pipe and seal corrugated pipe are respectively connected on the supporting flange and moving flange, on the moving flange a sealing ring is mounted, said supporting flange is mounted on the bearing support abutment, and on the supporting flange a gas transmission channel is set, said gas transmission channel is communicated with seal cavity between the working corrugated pipe and seal corrugated pipe. The invented inspection seal structure utilizes two internally-externally cover-mounted metal corrugated pipes to form seal cavity, only on the supporting flange two symmetrical gas transmission channels are set, the air admission can be implemented.

The invention provides a method, device and equipment for circularly issuing coupons based on a block chain and a storage medium, and the method comprises the steps: obtaining login request information of a user, the login request information comprising a user identifier; Obtaining user historical transaction information from the block chain according to the user identifier; Generating and sendingcoupon information according to the historical transaction information of the user; If payment request information of the user in one merchant in the alliance chain formed by the merchants is obtained, the payment request information comprises an initial payment amount and commodity information; If the commodity information satisfies the discount coupon information, re-calculating the initial payment amount according to the discount coupon information to obtain a payment amount; And according to the payment amount, sending the general point to the user identifier according to a preset mode. The method has the effects of improving the pertinence of issuing discount coupons by merchants and improving the utilization rate of the discount coupons; And when the user pays successfully each time, the general points are issued to the user, and the effect of promoting user consumption is achieved.

The invention discloses a method for controlling the ratio of calcium to aluminum of auto sheet ladle top slag to be 1.2-1.8. The method comprises the following steps that terminal oxide activity of a convertor is controlled, and end slag basicity of the convertor is controlled; the steel tapping slag quantity of the convertor is controlled, and the ladle slag adhesion quantity of an auto sheet is controlled; the material type, the adding quantity and the mode of a modification agent of auto sheet ladle top slag are controlled, and the bottom blowing flow and gas closing time of auto sheet ladle are controlled; and finish of RH slag sampling operation is controlled, and the ratio of the calcium to aluminum of the auto sheet ladle top slag to be 1.2-1.8 is controlled. According to the embodiment, through the method for controlling the ratio of the calcium to aluminum of the auto sheet ladle top slag to be 1.2-1.8, the technical problem that in the prior art, the ratio of the calcium to aluminum of top slag cannot reach 1.2-1.8 is solved, the quantity of top slag TFe is lowered, and the qualification rate of finished products is improved.

The invention relates to a receiving element (4) for mounting pouch cells, has a base body. The receiving element comprises a base body (5). With respect to an object of receiving the pouch cells securely and cost-effectively in a frame or housing, the receiving element is characterized in that the base body (5) is formed as a profile having a contact surface (5a) for contact against a sealing seam (2) of a pouch cell.

The invention discloses a drain valve which comprises a motor, a cam, a connecting rod and a water valve. The cam is arranged on an output shaft of the motor, and a connecting rod shaft is arranged on the cam; one end of the connecting rod is arranged on the connecting rod shaft, and the other end of the connecting shaft is arranged on a piston of the water valve; a spring arranged on the connecting rod in a sleeved mode is arranged between the piston of the water valve and an end cover; the drain valve further comprises an accelerating mechanism which is arranged in the motor and is capable of accelerating the process that the cam pushes the piston of the water valve to be closed. According to the drain valve, through the fact that the accelerating mechanism is arranged in the motor to accelerate the closing of the piston, the piston is made to be closed more tightly, and the occurrence of the phenomenon of leakage is avoided effectively.

The invention relates to an intelligent photovoltaic power generation system, which comprises a composite photovoltaic power generation blade (1), a hollow transparent plate (2), a blade rotating device (4), an electric energy output device (5), a mobile terminal and a miniature control unit (6), wherein the composite photovoltaic power generation blade (1) is arranged in the hollow transparent plate (2) and are connected with the blade rotating device (4) and an electric energy output device (5) respectively; the miniature control unit (6) is connected with the blade rotating device (4), the electric energy output device (5) and the mobile terminal respectively; and a generated energy calculation module and a generated power calculation module are arranged in the miniature control unit (6). Compared with the prior art, the intelligent photovoltaic power generation system integrates power generation, shading and heat insulation, achieves intelligent control, is stable in structure and easy to maintain, has great significance to social production and lives of people under the condition of national support for photovoltaic industry, and has practical economic benefits.

The invention relates to a quantum dot fluorescent screen. The quantum dot fluorescent screen comprises a frame, a liquid crystal module and a backlight module, wherein the liquid crystal module and the backlight module are fixedly mounted in the frame; the backlight module is mounted on the back surface of the liquid crystal module and comprises a micro-nano-structured diffusion film, an upper brightness enhancement film, a lower brightness enhancement film, a quantum dot composite diffusion film, a light guiding plate and a total reflection film which are successively arranged from top to bottom; the light guiding plate is in the shape of a frustum; a blue-violet LED bulb strip is arranged on a large side surface of the light guiding plate; and a reflecting plate is arranged on the outer side of the blue-violet LED bulb strip. The quantum dot fluorescent screen has the advantages that while having a quantum dot screen color gamut, the final quantum dot fluorescent screen further has diffusion and brightness enhancement optical functions, namely, a whole display panel has wide color gamut, the color expressive force is good, and the display property of a liquid crystal display panel is improved.

The invention relates to brazing fluxes used for welding, in particular to a brazing flux used for melt-brazing of aluminum alloy / stainless steel. The brazing flux is characterized in that the brazing flux is prepared by mixing and grinding powder of potassium tetrafluoroaluminate+potassium hexafluoroaluminate (KAlF4+K3AlF6) eutectic, potassium fluorosilicate, potassium fluoroborate, aluminum, zinc, tin and copper; the brazing flux comprises, by weight, 40%-60% of potassium tetrafluoroaluminate+potassium hexafluoroaluminate (KAlF4+K3AlF6) eutectic, 0-10% of potassium fluorosilicate (K2SiF6), 0-10% of potassium fluoroborate (KBF4), 10%-30% of aluminum (Al), 0-10% of zinc (Zn), 0-10% of tin (Sn), and 0-10% of copper (Cu); the sum of the weight percents of all the raw materials is 100%. According to the brazing flux, the good wetting spreading property of an existing brazing flux is maintained, and meanwhile, the texture of a connector is improved, and forming of brittle intermetallic compounds is reduced, so that the mechanical property of the connector of melt-brazing is improved, and finally dissimilar metal of the aluminum alloy and the stainless steel is connected reliably with high quality. The brazing flux further has the advantages that the melt-brazing process is relatively simple; the energy consumption and the cost of the raw materials are low; the residual quantity of the brazing flux is small after welding; and residues are easy to clean up.

An internal cooling composite beamer with a hard alloy blade welded on the blade teeth, radial water inlet hole at the fore front of the knife handle at the bottom of each blade teeth slot, water through hole of the core connecting with the water inlet and outlet holes, screw plug installed at the front of the water through hole, with the beamer made by the front thick and rear finer beamers, front of the blade and axle line of the beamer forming a included angle of 3-5 degrees, cutting blade of the finer beamer crossing with the radial cross section blade of the rectification margin through the beamer axle. Due to the ladder progress of the thick and finer beamers, it plays the role of two beamers. The cutting fluid can reach to the teeth of the blade with lubrication and lowering down of temperature. 3-5 degree blade tilt angle of the beamer stabilizes the cutting. It can machine high quality thin and long hole.

The invention discloses a circumcision stitching instrument. The circumcision stitching instrument comprises a handle, a cutting bin, a driver, a glans penis cover, a nail push disc, a cutting knife, a nail bin, a nail abutting seat, a knife cushion, a push rod and a safety catch, and further comprises a resetting device used for contracting the cutting knife to be reset into the cutting bin. Due to the fact that the resetting device is arranged, it can be guaranteed that after the surgical cutting operation is completed, the cutting knife can be withdrawn into the cutting bin in time and is not exposed out, the circumcision stitching instrument has the advantage of being good in safety, and is more reliable for an medical worker to use, the medical worker does not need to give some attention to considering the safety problem, and the beneficial effect of improving surgical efficiency is achieved.