41results about How to "Restrict flow" patented technology

The invention discloses a tunnel wind power generation device. With the adoption of the device, utilization of wind power in a tunnel and electric generation and energy supply functions can be realized. A framework is defined by a left side plate, a right side plate, an upper protecting plate and a lower protecting plate; two wind power receiving covers are fixed at front and back parts of the framework; electric generators on the outer sides of the protecting plates and wind power rotators on the inner sides of the protecting plate penetrate through the protecting plates to be connected; flowdeflectors are fixed between the two wind power rotators; two piezoelectric patches are arranged above each wind power rotator and embedded into the side plates on the two sides respectively; a vibrational thin plate is fixedly connected with the four piezoelectric patches; a storage battery and a rectifier are located in a casing outside the lower protecting plate; electric power generated by the electric generators and the piezoelectric patches is transmitted to the storage battery through the rectifier. The device adopts the tunnel wind power for power generation, has the characteristics of small size, high power generation and the like and is particularly suitable for being used in the railway tunnel.

The invention relates to a LDMOS (Lateral Double-diffuse MOS) device and a making method thereof. The LDMOS device comprises a substrate, a drift region located on the substrate and a trench surrounding the drift region, wherein the drift region comprises a source region and a drain region; and the depth of the trench is larger than that of the drift region. As the trench surrounds the drift region, hole current in an electron hole pair generated in the case of high temperature work by the LDMOS device can be limited from flowing to the substrate, the LDMOS device and the peripheral logic circuit can be effectively isolated, and happening of crosstalk is avoided. Besides, the invention also provides an LDMOS device making method.

The invention discloses a flue gas baffle device inside a horizontal waste heat boiler, and aims to solve a 'flue gas corridor' problem caused by short circuit of flue gas of the horizontal waste heat boiler. The flue gas baffle device inside the horizontal waste heat boiler comprises multiple rows of heated surface tube bundles arranged inside a flue, wherein the two ends of each row of the heated surface tube bundle are connected with corresponding headers; a plurality of inter-tube baffles are arranged inside the flue; each inter-tube baffle is parallel to the extending direction of the flue; a plurality of tube holes are formed in each inter-tube baffle; each heated surface tube bundle vertically penetrates through the corresponding tube holes and is fixed with the inter-tube baffles through sleeves; and side wing baffles are arranged between the heated surface tube bundles and the inner wall of the flue. The flue gas baffle device inside the horizontal waste heat boiler achieves uniform distribution of the flue gas in the flue and sufficient scouring of the flue gas to the heated surface tube bundles, so that the heat exchange efficiency of the boiler is improved, and the safe and stable running of the boiler is ensured.

The invention discloses an automobile central channel drawing stamping die, a shaping die and a process surface modeling method. The drawing stamping die comprises an upper die seat, a lower die seat,a female die, an upper blank holder, a male die and a lower blank holder; the lower blank holder is located on two sides of the male die; a die profile of the male die is used for modeling a protruding main body part of an automobile central channel; a drawing parting line of the male die and the female die is located at the bottom of the side wall of the main body part; the lower blank holder isprovided with U-shaped grooves corresponding to grooves in the two sides of the automobile central channel; and the U-shaped grooves are used for forming prototype grooves of the grooves in the two sides of the automobile central channel in a drawing mode, and meanwhile the U-shaped grooves are used for forming drawing ribs of the die on a material pressing face. In design of a supplementary surface of a drawing process of the die, an additional supplementary surface in a traditional drawing process is omitted, so that the material utilization rate is improved, and the drawing difficulty of aproduct is reduced.

A partition member (42) is installed between a frame (21) and the stator (33) of an electric motor (24). The partition member (42) establishes communication between a connection passage (26) and a gap (39a) and between a gas passage (40) and a delivery space (16). The refrigerant gas delivered from a compression mechanism (22) entirely flows into the gap (39a) and passes through a communication space (15) and then flows through the gas passage (40) so as to be delivered from a delivery pipe (18).

The invention discloses a sputtering target cooling device based on IBAD nano-coating equipment. The sputtering target cooling device comprises a body integrally formed, wherein a water inlet, a wateroutlet and a guiding groove for limiting cooling liquid are formed in the body; the water inlet and the water outlet are formed in the two ends of the guiding groove separately; and the envelope lineof the guiding groove is rectangular. The sputtering target cooling device can improve the cooling effect while ensuring the leakproofness.

The invention discloses a high-sunlight-reflectivity ceramic glaze which comprises the following raw material components in parts by weight: 8-21 parts of an aluminate, 15-36 parts of mica, 7-15 partsof scheelite, 8-16 parts of rutile, 5-15 parts of lithium aluminum silicate, 3-5 parts of quartz, 0.3-1.5 parts of a modifier and 0.5-2 parts of a dispersing agent. The glaze has excellent high sunlight reflectivity, thermal shock resistance and heat insulation performance, and is especially suitable for surface glaze of cold tiles. The invention discloses a building energy-saving porcelain glazed tile. The defects that an existing common porcelain glazed tile cannot effectively reflect sunlight and does not have the building energy-saving effect are overcome. The porcelain glazed tile not only can selectively absorb and reflect sunlight in different wavelength ranges to reduce energy absorbed by the surface of a building, but also is helpful for limiting heat from flowing to the internalenvironment, so that the heat can be effectively blocked under solar radiation, a lower tile surface temperature is kept, and the porcelain glazed tile can be used as a cold ceramic tile on the surface of the building.

The invention discloses a dual-power fast switching device which comprises a first inlet wire unit having one end connected to a main power source, a second inlet wire unit having one end connected toa backup power source; a first isolation unit connected to the other end of the first inlet wire unit; a second isolation unit connected to the other end of the second inlet wire unit; a switching unit connected to the first isolation unit and the second isolation unit and further connected to a load; wherein the first isolation unit and the second isolation unit are configured to isolate the electrical connection between internal and external grids, and the switching unit is configured to switch the load to the main power source or the backup power source. The dual-power fast switching device provides a reliable protection mechanism by adding the inlet wire units and the isolation units. The isolation units can stop the internal short-circuit current from flowing to the grid. The inlet wire units provide a complete protection strategy, and can restrict the line faults to internal grid in cooperation with a switching interlock mechanism.

The invention provides a safety protection device for a photovoltaic power station inverter. The safety protection device comprises an outer shell, a base, an inner shell, a side damping seat, a folded plate, a telescopic rod and a wire passing pipe. The right side of the outer shell is hinged to a right side cover, and the front side of the right side cover is connected with the front of the right side of the outer shell through a lock catch; the base is fixedly connected with the upper portion of the outer shell; the four parts of the folded plate are fixedly connected with the upper surfaceand the lower surface of the interior of the outer shell; one end of the telescopic rod is fixedly connected with the upper surface and the lower surface of the interior of the outer shell, and the other end of the telescopic rod is fixedly connected with the two ends of the corresponding side supporting plate; the side support plates are movably connected to the inner sides of the folded plate;the inner shell is slidably connected into the middle openings of the side supporting plates on the two sides; the anti-vibration performance of the inverter protection shell is improved, the probability that the inverter core assembly is damaged by vibration generated in the carrying process is reduced, the effect of limiting the air flow direction can be achieved through an air drainage cover, heat dissipation is more concentrated, and the heat dissipation effect is further improved.

The invention discloses an electro-deposition preparation method and device for a super-hydrophobic structure on the inner wall of a pipeline, and relates to the field of non-traditional machining. According to the method, a hollow tubular anode is placed in the center of the interior of a to-be-machined pipeline, and a certain gap is kept; a deposition solution is slowly introduced into a tubular anode, liquid drops attached to an opening in the upper end of the hollow tubular anode are adsorbed to the inner wall of a workpiece pipeline according to the electrostatic adsorption principle, a micro-channel is formed between the tubular anode and the inner wall of the workpiece pipeline, an electro-deposition channel is formed, and therefore the super-hydrophobic micro-nano structure is obtained. After the micro-nano structure is oxidized for a period of time or is coated with a low-surface-energy substance, a super-hydrophobic surface can be obtained on the inner wall of a workpiece pipeline. The operation process is simple, the micro-nano structure is easy to control, the hydrophobicity of the inner wall of the pipeline is enhanced, and the obtained super-hydrophobic structure pipeline can achieve the effect of accelerating the flow speed in the pipeline.

The invention discloses a centrifugal impeller for a blood pump and the blood pump. The centrifugal impeller for the blood pump comprises a round bottom plate, and a through hole is formed in the middle of the bottom plate to form a secondary flow channel; the centrifugal blades are arranged on the upper surface of the bottom plate, each centrifugal blade is a banana-shaped blade with a thick middle part and two thin ends, the wrap angle of each centrifugal blade is greater than or equal to 90 degrees, and the centrifugal blades radially extend from the outer edge of the through hole to the periphery of the bottom plate. The supporting structure comprises a supporting shaft and a supporting blade, the supporting shaft is arranged in the center of the through hole, one end of the supporting blade is connected with the supporting shaft, and the other end of the supporting blade is connected with the bottom plate. According to the banana-shaped blade structure with the wrap angle larger than or equal to 90 degrees, blood damage and thrombus in the impeller can be reduced. The supporting structure is arranged in the through hole of the bottom plate and can support the centrifugal impeller to rotate at a high speed, the overall structural strength and stability are improved, the flow speed of blood in the secondary flow channel can be increased by arranging the supporting blades, thrombus is avoided, and the dynamic balance of the rotor is improved.

A grounding system suitable for urban rail transit is disclosed. The working grounding device is configured in that symmetrical working grounding points are arranged on the left side and the right side of a vehicle body, and each working grounding point is electrically connected with a switch, a carbon brush and a wheel set in sequence. The protective grounding device is configured in that symmetrical protective grounding points are arranged on the left side and the right side of a vehicle body, and each protective grounding point is electrically connected with a control switch, a power diode,a grounding carbon brush and a wheel set in sequence; and an automatic control system is used for regulating and controlling the currents of the two grounding devices, so that the currents on the twosteel rails are approximately equal. Power diodes are adopted for protection grounding, current is limited to only flow into the steel rails from a train body, damage of train rail backflow to train-mounted weak point equipment is avoided, the currents on the two steel rails are equal through an automatic control system, and the safety of a train is improved.

The invention discloses a dry-type transformer with improved heat dissipation, and relates to the technical field of dry-type transformers, and the dry-type transformer is characterized in that the dry-type transformer comprises a vertical iron core, the top and the bottom of the vertical iron core are fixedly connected with a transverse iron core, and the two ends of the transverse iron core are fixedly connected with a fixing frame and a second fixing frame respectively; a supporting column is fixedly connected to the bottom of the second fixing frame, fans are fixedly connected to the positions, located at the two ends of the high-voltage coil, of the top of the supporting column, wind direction adjusting devices are fixedly connected to the tops of the fans, and the vertical iron core is sequentially sleeved with a low-voltage coil, an insulating sleeve and the high-voltage coil. A heat dissipation gap exists between the high-voltage coil and the insulating sleeve, and the top of the second fixing frame is fixedly connected with supporting partition plates which are distributed on the outer side of the vertical iron core in an array mode. The dry-type transformer has the advantages that heat in the dry-type transformer can be transferred to the outer wall to facilitate heat dissipation, and the wind direction of the fan can be adjusted to enable wind blown by the fan to more effectively dissipate heat of the dry-type transformer.

The invention discloses a leakage-preventing structure and relates to the technical field of valves. The leakage-preventing structure comprises valve bodies. A water inlet and a water outlet are formed in the valve bodies respectively, valve seats and rubber mats are fixed to the inner walls of the valve bodies, valve plates are arranged in the valve bodies, do reciprocating motion in the water flow direction under the effect of the water pressure and the effect of resetting devices and are sealed in the radial direction when making contact with the valve seats, and sealing space is formed among the rubber mats, the valve seats and the valve plates when the valve plates make contact with the valve seats and the rubber mats at the same time. According to the invention, when water leaks, the pressure difference of the sealing space formed among the rubber mats, the valve seats and the valve plates is damaged, water flow larger than starting flow of a water meter is formed instantly so as to drive the water meter to measure the water flow, and therefore the phenomenon that the water meter cannot measure the water flow because the water flow is small is prevented, loss of water suppliers is avoided, backflow of fluid is prevented, and the flow direction of the fluid is limited.

The invention discloses a plugging device for an unclosed hole of a patent ductus arteriosus. The perforated plugging device for the unclosed hole of the patent ductus arteriosus comprises a front disk for plugging a gap, a cylindrical barrier part for blocking an unclosed ductus, and a through hole penetrating through the front disk and the cylindrical barrier part; one end of the cylindrical barrier part is connected with the front disk; the other end of the cylindrical barrier part is a closed end; the diameter of the front disk is greater than that of the cylindrical barrier part; the front disk, the cylindrical barrier part and the through hole are all formed by weaving a plurality of memory alloy wires; the memory alloy wires penetrate through the through hole to form the hole wall of the through hole and are wound to form the front disk and the cylindrical barrier part; the two ends of the memory alloy wires are fixed to the same fixing clamp for restricting the memory alloy wires; the memory alloy wires are interwoven to form an elastic mesh; a sealing film is arranged in the elastic mesh. According to the perforated plugging device for the patent ductus arteriosus, the shunt of aorta-pulmonary artery is limited, and the blood flow of the aorta of a high-pressure chamber is also prevented from flowing to the pulmonary artery; the volume overload and the pressure transfer of pulmonary vessels are lightened; serious consequences caused by sudden rise of the pulmonary artery pressure can also be prevented, so that the high pressure of a right heart system has release space.

The invention discloses a premixed water-cooled combustion corner tube steam boiler. The premixed water-cooled combustion corner tube steam boiler comprises a combustor, a boiler body, a condenser anda chimney. The combustor comprises a premixer, a diverging distributor and a water-cooled combustion head. The boiler body comprises a frame structure composed of a boiler barrel, four-corner descending pipes and collecting boxes, a front wall water-cooled wall in butt joint with the combustor, a convection tube panel, a left membrane type water-cooled wall, a right membrane type water-cooled wall, a heat insulation material and a shell. The condenser is arranged at the tail of the boiler body. Gas and air are mixed through the premixer and fed into the diverging distributor composed of a shell plate and flow guide cones and enter the water-cooled combustion head composed of a pore plate, a light pipe and a light pipe portion of the front wall water-cooled wall to be ignited, water-cooledcombustion reduces the combustion temperature and NOx emission, then high-temperature flue gas scours a convection tube bank to the depth of the condenser to reduce the flue gas temperature, and theheat efficiency of the boiler is improved. The water-cooled combustion head has the effects of preventing backfire and fire disengaging, the combustion safety is guaranteed, the whole boiler is supported by corner tubes, a steel frame is not needed, the structure and manufacturing are simple, and the boiler is of a module structure and is rapid to assemble on site.

The invention aims to provide a bleed air purging system of a dual-fuel gas turbine. The bleed air purging system comprises a dual-fuel nozzle, a fuel oil purging pipeline and a fuel gas purging pipeline; a throttling assembly and a first-stage fuel oil purging pipeline stop valve are sequentially installed on the fuel oil purging pipeline; an outlet of the first-stage fuel oil purging path stop valve is connected with a first fuel oil branch pipeline and a second fuel oil branch pipeline; the first fuel oil branch pipeline is sequentially provided with a second-stage fuel oil purging path stop valve and a first check valve; the rear portion of the first check valve is connected with the dual-fuel nozzle, and the fuel gas purging pipeline is provided with a first-stage fuel gas purging path stop valve; an outlet of the first-stage fuel gas purging path stop valve is connected with a first fuel gas branch pipeline and a second fuel gas branch pipeline; the first fuel gas branch pipelineis sequentially provided with a second-stage fuel gas purging path stop valve and a second check valve; and the rear portion of the second check valve is connected with the dual-fuel nozzle. According to the bleed air purging system, online switching can be realized, the requirements of different purging air sources are met, and continuous and stable operation can be realized.