53results about How to "Little impact on flow" patented technology

The invention brings forward a composite multi-closed-chamber thick-walled box beam and an integral moulding method. The box beam comprises a multi-closed-chamber box framework and an external skin. The multi-closed-chamber box framework adopts a fiber reinforced material/prepreg resin system, and the external skin adopts a fiber reinforced material fabric/liquid molding resin system. The multi-closed-chamber box framework and the external skin are integrally formed. A layer of fibrofelt reinforced resin film is also included between the multi-closed-chamber box framework and the external skin. The fibrofelt reinforced resin film has a consistent resin system with the external skin. By inserting a layer of the fibrofelt reinforced resin film with lower surface density between the internal framework and the external skin, the resin film has good compatibility with the prepreg resin system and the liquid molding resin system in the curing mechanism. In addition, the influence on flow of the liquid molding resin is little, interface connection quality between the internal framework and the external skin is improved, and internal quality and integrity of the product are improved.

The invention discloses an electronic device which comprises a first shell, a heat dissipation assembly and a heating device. The first shell is provided with a first air inlet and a first air outlet.The heat dissipation assembly is detachably installed in the first shell. The heat dissipation assembly comprises a second shell and a gas driving device, the second shell is provided with an inner cavity, the gas driving device is arranged in the inner cavity, the second shell is provided with a second air inlet and a second air outlet, and the second air inlet and the second air outlet are connected with the inner cavity; the heating device is arranged in the first shell, and the heating device is in heat conduction connection with an outer side surface of the second shell; and the first air inlet is connected with the second air inlet, and the first air outlet is connected with the second air outlet. According to the scheme, a problem that the electronic device cannot rapidly dissipateheat in a background art can be solved.

The invention relates to a novel process structure and a method for short-circuit resistance electrodynamic force of transformer winding, in particular to a wire cake binding process method and several binding structures applied to winding manufacturing in the field of transformers. According to the novel structure and the technological method, the percent of pass of the sudden short circuit testof the transformer can reach 100% theoretically, that is to say, under the condition that the pressing nail or the pulling screw of the transformer is out of action, it can be guaranteed that a winding is not damaged. The structure and the method are simple, the effect is outstanding, and the electrical performance and the temperature rise of the transformer are not influenced.

The invention discloses a magnesium alloy thin plate strip blank extruding die which comprises a die body, wherein the die body is internally provided with a material storage cavity and an extruding channel communicated with the material storage cavity, the cross section of the extruding channel is rectangular, the two walls of the extruding channel in the thickness direction and two intersection lines of the material storage cavity are mutually staggered along the extruding direction, when the die is in use, extrusion on the upper part of magnesium alloy entering into the extruding channel is inconsistent with the extrusion on the lower part of the magnesium alloy, speed difference is formed, and a shearing force is produced, thus a basal plane is inclined and the texture of the basal plane is weakened, the follow-up processing of a plate strip blank can be convenient, and the stamping property of a plate can be improved. Besides, smooth transition is formed between the material storage cavity and the extruding channel, no dead angle or raw material retention is formed, raw materials can pass smoothly, and cleaning is easy; and meanwhile, the raw materials smoothly enter into the extruding channel by virtue of a transitional channel, and the influence on the flow of the raw materials is less.

The invention discloses a liquid lead bismuth alloy-inert gas two-phase flow void fraction measuring device and method based on differential pressure method. The liquid lead bismuth alloy-inert gas two-phase flow void fraction measuring device comprises a loop formed by sequentially communicating a gas-liquid two-phase flow ascending section, a horizontal gas-liquid separation section, a single-phase liquid descending section and a single-phase liquid horizontal section; the gas-liquid two-phase flow ascending section is provided with a gas injection port, the gas-liquid two-phase flow ascending section is divided into a plurality of measuring sections, and the pressure difference of each section is measured through a differential pressure gauge; the single-phase liquid descending sectionis provided with an electromagnetic flowmeter; a gas discharge valve is arranged at the upper part of the horizontal gas-liquid separation section; compressed inert gas is stored in a high-pressure gas storage tank, a gas pressure reducing valve at the top of the high-pressure gas storage tank is controlled to adjust the flow of gas injected through a gas injection port, and a gas flowmeter is used for recording the flow amount of the inert gas; the average void fraction of the gas-liquid two-phase flow ascending section is obtained by measuring the pressure difference of the gas-liquid two-phase flow ascending section and then calculating. The liquid lead bismuth alloy-inert gas two-phase flow void fraction measuring device has the advantages of small disturbance on flow amount measurement, high measurement precision, simple overall structure, easy processing and low cost.

The invention discloses an automatic ester-water separator for n-butyl acetate production, which comprises a bottom plate, two groups of supporting plates are fixed on both sides of the top end of the bottom plate, an ester-water separator main body is fixed on the top ends of the supporting plates, a cooling jacket is fixed on the outer peripheral surface of the ester-water separator main body, and the cooling jacket is fixed on the top end of the bottom plate. A plurality of groups of main flow dividing pipes are mounted at the top end of the ester-water separator main body, the main flow dividing pipes are distributed at equal intervals in the horizontal direction of the cooling sleeve, ester phase pipe straight pipes are mounted at the top ends of the main flow dividing pipes, first bent pipes are mounted at the two ends of each ester phase pipe straight pipe, and the bottom ends of the first bent pipes extend into the ester-water separator main body. According to the invention, the flowing influence of the mixed liquid is reduced, the separator is maintained at a relatively low temperature, the influence of the temperature on ester and water is reduced, the ester-water separation quality of the separator is improved, the separator carries out ester-water separation in a full-load state, and the separation efficiency of the separator is improved.

The invention discloses a conductor having a built-in stranded inner core and capable of reducing AC resistance. The conductor comprises an inner conductor, wherein the inner conductor enables itself to have positive charges after being electrified by positive DC electricity, the inner conductor comprises multiple inner cores and a filling material, the multiple inner cores are stranded into a bundle, an outer surface of the stranded multiple-core bundle is externally wrapped in an inner insulation layer, the filling material is filled between the stranded multiple-core bundle and the inner insulation layer, an outer surface of the inner insulation layer is wrapped in an outer conductor used for transmitting AC electricity, the inner conductor, the inner insulation layer and the outer conductor are coaxially arranged, the inner cores, the filling material and the outer conductor are prepared by an excellent conductor material, and the inner insulation layer is prepared by an insulation material. During AC transmission, free conductive electrons flowing in the outer conductor are uniformly distributed generally, so AC resistance of the outer surface of the outer conductor is reduced, electric energy loss is reduced, the outer conductor fully performs the conductor effect, and the conductive performance and the utilization rate of the conductor are greatly improved.

The invention provides high-temperature denitration and dust removal integration equipment. The high-temperature denitration and dust removal integration equipment comprises a body and an ash bucket,wherein the body is of a V-shaped plate-type structure; the body is arranged in a flue or a reactor and is used for carrying out out denitration and dust removal on flowing-through flue gas; and the ash bucket is arranged outside the flue or the reactor, is located under the body and is used for collecting dust removed by the body. According to the high-temperature denitration and dust removal integration equipment provided by the embodiment of the invention, the V-shaped plate-type body is arranged in the flue or the reactor to remove the dust in the flue or the reactor and is used for cooperatively removing nitrogen oxide; the ash bucket for collecting the dust is arranged under the body; the high-temperature denitration and dust removal integration equipment has small pressure loss andsmall influences on the flowing of the flue gas, and can be used for effectively removing the nitrogen oxide in fly ash and the flue gas at high temperature, so that the abrasion to a catalyst and theblocking to subsequent equipment, which are caused by the fly ash in an SCR (Selective Catalytic Reduction) system can be effectively reduced and the total denitration efficiency of an SCR denitration system is improved.

The invention discloses a rectangular-cross-section conductor internally provided with multiple inner cores and capable of reducing AC resistance. The conductor includes an external conductor which is used for transmitting AC and has a rectangular cross section. In the external conductor, the plurality of inner cores are arranged in parallel uniformly in an embedded manner and used for allowing positive AC to pass so as to be electrified with positive charge. The outer surface of each inner core is wrapped with a layer of internal insulating layer. The inner cores and the external conductor are made of a good conductor material. The internal insulating layers which prevent positive charge in the inner cores from entering the external conductor are made of an insulating material. During AC power transmission, the conductor is capable of enabling free conductive electrons flowing in the external conductor to tend to be distributed uniformly so as to reduce the AC resistance on an outer surface layer of the external conductor and reduce electric energy consumption brought to the conductor because of the AC resistance so that the external conductor is enabled to play fully a conductor role and thus the utilization rate of the conductive performance of the conductor in electric power transmission is improved significantly.

The invention relates to a floor drain capable of conveniently filtering hair. The floor drain comprises a casing, a seepage cover and a floor drain core, wherein the floor drain core is detachably arranged in a casing drainage channel; the floor drain core comprises a cylindrical main frame and an openable and closable bottom support; the main frame comprises a liquid collection opening and a drainage opening; the liquid collection opening faces the seepage cover; the bottom support is arranged on the drainage opening; a plurality of hook teeth used for filtering hair are formed in the surface, which faces a liquid coming direction, of the bottom support. Since the plurality of hook teeth are arranged on the surface, which faces the liquid coming direction, of the bottom support, the hookteeth face the liquid coming direction, hair mixed in the discharged liquid is intercepted by the hook teeth, and the hair is wound among the hook teeth. Then, the liquid discharge direction is positioned on the peripheral edge of the bottom support, and the influence of the intercepted hair on flow of the discharged water is very small. Therefore, the floor drain disclosed by the invention has the advantages that the hair in the discharged water can be effectively filtered, the condition that blockage is caused because the intercepted hair blocks outflow of the discharged water is avoided, and the beneficial effect of fast water drainage can be achieved.

The invention discloses a waste heat coil of a heating furnace. A water outlet and a water inlet are formed in the two ends of the waste heat coil. A plurality of vertical bent pipes are arranged in the middle section of the waste heat coil. The bent pipes are parallel to one another. A feeding notch is formed between every two adjacent bent pipes. The length of a top connection section between every two adjacent bent pipes is smaller than that of a bottom connection section. According to the waste heat coil of the heating furnace, by the adoption of the vertical bent pipe structure, the waste heat of smoke is sufficiently utilized, and influences on smoke ventilation are small; in addition, the appearance is attractive, and the waste heat coil can be combined with a flue conveniently; by the adoption of the structure, the length of the waste heat coil is effectively increased, so that heat in the smoke is sufficiently absorbed by the waste heat coil, and the temperature of hot water in the waste heat coil is also increased rapidly.

The invention discloses an eccentric butterfly valve, which comprises a valve body 1. An eccentric butterfly plate 2 with a spherical sealing surface and a valve seat 10 with a corresponding spherical sealing surface are arranged in the valve body 1; the eccentric butterfly plate 2 is arranged on a valve rod 5 through a connecting rod 9; the back of the eccentric butterfly plate 2 is provided with an eccentric adjusting block 3; the eccentric adjusting block 3 is connected with an arc connecting rod 4 through an eccentric adjusting block moving shaft pin 8; and the arc connecting rod 4 is fixedly arranged on the valve rod 5 through a positioning pin 6. The friction between the sealing surfaces is reduced, the purpose of opening and closing a valve through a small valve rod torque is fulfilled and the driving device is simplified by using a medium pressure as a main acting force for sealing the valve and adjusting the contact of the sealing surfaces by adopting the valve plate of a large eccentric connecting rod structure and a triangular eccentric adjusting block.

The invention provides a perfusion system for in-vitro extracellular electroneurophysiological research, belonging to the technical field of apparatus for in-vitro extracellular electroneurophysiological research. The perfusion system provided by the invention overcomes the technical problem of too great errors during quantitative analysis of transmembrane movement of ions confined in and located out of a cell wall in virtue of a perfusion tank. According to a technical scheme in the invention, a perfusate is stored in a perfusate storage device and is communicated with the perfusion system via a perfusate inlet pipe; a peristaltic pump is arranged between the perfusate storage device and the perfusion system; after the perfusate passes through the perfusion system, the perfusate becomes a waste perfusate which is communicated with a waste perfusate collecting device via a waste perfusate discharge pipe; the waste perfusate discharge pipe is provided with a waste-perfusate-discharge control pump; the perfusion system comprises a mounting rack and a perfusion device; and the perfusion device is mounted on the mounting rack. The perfusion system provided by the invention enables the perfusate to enter from the bottom of a perfusion tank, and the flow rate of the perfusate is reduced after obstruction by a screen mesh, so an ion flow rate during efflux of an in-vitro sample is reduced due to influence by flowing of the perfusate; and thus, the quantitative analysis of the transmembrane movement of ions confined in and located out of the cell wall is improved in precision.

The invention discloses an integrated two-stage heating efficient energy-saving heat pipe steam generator. The integrated two-stage heating efficient energy-saving heat pipe steam generator comprisesa flue gas pipe, wherein a gas inlet connecting pipe and a gas outlet connecting pipe are installed at the upper end and the lower end of the flue gas pipe correspondingly, a steam tank is installed on the outer side wall of the flue gas pipe in a surrounding manner, and a water inlet pipe is installed at the lower end of the steam tank; and a first-stage exhaust pipe and a safety pipe are installed above the steam tank, a safety valve is installed on the safety pipe, a partition plate is installed in the steam tank, and a steam cavity and a water storage cavity are formed in the upper layer and the lower layer of the partition plate correspondingly. The integrated two-stage heating efficient energy-saving heat pipe steam generator is ingenious in structure, the heat transfer efficiency isimproved and the utilization rate of high-temperature flue gas waste heat is increased through spiral heat pipes and a two-stage heating heat pipe, the waste heat utilization rate of low-temperatureflue gas is increased through graded heating of multiple steam tanks, water is pumped into the device through a pneumatic liquid pump by means of flue gas kinetic energy, and the equipment energy consumption is reduced.

The invention discloses a method and system for eliminating the impact and rub failure of low-pressure shaft seals of a turbine. The method comprises the step that in the starting process of the turbine, a cooling system of the turbine is started, so that cooling is conducted on steam exhaust cones of a low-pressure cylinder of the turbine. The temperatures of the steam exhaust cones are lowered,the temperatures of the low-pressure shaft seals arranged on the steam exhaust cones are lowered, and thus, deformation of the low-pressure shaft seals is reduced; inclination of the low-pressure shaft seals is restrained; and the reduction amount of a gap in the bottom of each low-pressure shaft seal is reduced, and thus, the problem that in the starting process of the turbine, the impact and rubfailure occurs due to temperature variation of the shaft seals is avoided. The method is simple and easy to implement; the improvement measures are obvious in effect; and after improvement, the flowinfluence of steam inside the turbine is extremely small.

The invention discloses an intelligent adjusting method for air convection in an induction furnace during online-moving heating of a steel plate. Firstly, the steel plate enters the heating induction furnace through a furnace front roller bed and is heated in the induction furnace, and an air flow detecting device of an air flow detecting and adjusting system mounted on the inner surface of an upper inductor is used for detecting air flowing in the induction furnace in real time and sending detection data to an intelligent processing unit; secondly, the intelligent processing unit is used for working out the air flowing direction and strength in the induction furnace according to the detection data and working out the air flow rate and the acting direction needed for counteracting air flowing, and worked-out results are sent to a PLC control system; thirdly, the PLC control system gives out adjusting commands to an air blowing device of the air flow detecting and adjusting system, and the adjusting commands include the air flow rate command and the air flow direction command; and fourthly, the air blowing device carries out real-time air-blowing adjustment, so that air convection in the furnace is lowered to an allowed range.

The invention relates to the technical field of oyster culture, in particular to an offshore original ecological oyster culture method. The offshore original ecological oyster culture method comprisesthe following steps: selecting different water areas for culture at different stages of oysters, performing piling at certain intervals in a culture area, arranging pile connecting lines in a longitudinal and transverse straight line manner, and fixing transverse strips on piles, so that the piles are mutually fixed, wherein the height of the transverse strips is 1m or above greater than the seasurface in a big tide, wood strips or bamboo poles are fixed on the transverse strips in parallel to form a rectangular fixed bent frame, an oyster attachment base is hung on the transverse strips andthe oyster attachment bas is positioned between a high tide line and a low tide line, so that oyster strings are in a submerged state in a rising tide and are in a dry and exposed state in a fallingtide; and the oysters are in a primary state similar to an intertidal zone. According to the offshore original ecological oyster culture method, the survival rate of oyster breeding is increased, andthe oyster breeding space is expanded.