107results about How to "Good shunt effect" patented technology

The invention discloses a preparation method of a rectangular multicore composite superconductive strip. The preparation method comprises the following steps of step one. preparing mixed slurry by using amorphous boron powder, magnesium powder and a malic acid ethanol solution; step two. preparing tubing precursor powder; step three. tubing, carrying out rotary swaging, and drawing, thus obtaining a Cu-Nb-MgB2 single-core rod; step four. placing the Cu-Nb-MgB2 single-core rod and a Cu-NbTi single-core rod in a Cu-Ni alloy tube for secondary packaging, thus obtaining a secondary complex; five. processing the secondary complex into a wire rod, then carrying out rotary swaging and drawing so as to obtain a rectangular multicore composite strip; step six. winding a high-silica glass fiber to form a disk, and clamping the two ends of the disk to be flat; and step seven. carrying out thermal treatment so as to obtain the rectangular multicore composite superconductive strip. Compared with a single MgB2 and NbTi superconducting material, the composite superconductive strip prepared by the method is relatively wide in temperature using range and has relatively high using magnetic field.

The present invention is directed toward a via fill material for use in solar applications that exhibits low series resistance and high shunt resistance. The via fill material according to the invention includes silver powder, a glass frit and a vehicle.

The invention relates to an onboard anti-thunder antenna cover, and aims to an anti-thunder antenna cover which is high in wave transmittance, high in strength and good in appearance consistency, is light and can be used for shunting a lightning induction load. The onboard anti-thunder antenna cover is implemented according to the following technical scheme that a cover wall is fabricated to be astream-lined antenna cover shell and is fixedly connected to a metal overlapped piece on an edge of an inner side of the antenna cover shell, the antenna cover shell is divided into an intermediate wave transmitting region encircling a surrounding external installation region, the intermediate wave transmitting region is of a multi-layer composite material dielectric sandwiched structure, a layeror more layers of metal patterns are arranged in the sandwiched structure, the remaining is a non-metal fiber layer, the metal pattern layers are frequency selection patterns having array characteristic at the wave transmitting region, the metal pattern layers are continuous metal patterns at the external installation region, metal powder is permeated into each laying layer of the surrounding external installation region so that the surrounding external installation region is converted to a conductive material, and the metal overlapped piece is pasted with an inner surface of the surrounding external installation region of the antenna cover shell 2 by conductive glue so as to achieve electrical conduction.

The invention relates to a centrifugal blower volute of a range hood. A molded line of the volute (1) consists of a first curve AB, a second curve BC, a log spiral CD and a straight line DE which are in smooth transition connection with each other, and the first curve AB and the second curve BC which form a volute tongue are front edge parts of a wing profile molded line, wherein the first curve AB is the front edge part of a wing profile upper airfoil molded line BAF, the second curve BC is the front edge part of a wing profile lower airfoil molded line BCF, and the upper airfoil molded line BAF and the lower airfoil molded line BCF form the wing profile molded line. The centrifugal blower volute uses the wing profile front edge parts with good streamline forms as the molded lines of the centrifugal blower volute tongue. The volute adopting the wing profile volute tongue can greatly reduce the probability of generating flow separations and back flows at the volute tongue and reduce impact losses, and is favorable for improving the wind quantity, the wind pressure and the efficiency of a centrifugal blower and reducing aerodynamic noises.

The present invention disclosed a kind of biomass gasified gas range burner. It includes a burner body, a flow-splitting ring and a flow-splitting cap. Said burner body contains a head portion for mounting flow-splitting ring and a handle portion for intaking gas and decontamination.

The invention relates to a low-permeability reservoir natural gas hydrate exploitation fracturing and sand prevention combined operation process method. The process method comprises the steps of hydraulic sand blasting perforation and fracturing string tripping-in, forward washing, lower-layer hydraulic sand blasting perforation primary fracturing, lower-layer sand prevention medium main fracturing, sand prevention medium filling operation, upper-layer hydraulic sand blasting perforation, fracturing, sand washing operation and the like. According to the process method, a hydraulic jetting toolis used, one or more jetting hole channels are formed in a reservoir through the water hammer effect, micro-cracks are generated in a near-wellbore zone, then the micro-cracks are pressed open and extend through the end sand removal fracturing technology, meanwhile, a sand prevention medium is used for filling the micro-cracks, end sand removal is achieved, and a plurality of short and wide high-flow-conductivity fracture zones are formed in a low-permeability reservoir; and effective transformation yield increase and sand prevention of the lower layer are guaranteed, multi-section dragging fracturing of a horizontal well of the argillaceous low-permeability reservoir can be implemented, reservoir transformation with high heterogeneity and large physical property difference is achieved, seepage conditions are improved, and the purpose of combining yield increase and sand control is achieved.

The invention discloses a through type rapid cut-off valve for emergently cutting off a pipeline, which comprises a valve body, a valve core and a valve rod, wherein a liquid inlet and a liquid outlet are formed at the two ends of the valve body respectively; the valve rod is fixed on the valve body; the liquid inlet end of a valve cavity is provided with a valve seat; the front end of the valve core is provided with a conical surface matched with the valve seat; a piston is fixed at the rear end of the valve core; a cylinder body matched with the piston of the valve core is arranged in the valve cavity and is fixed on the valve body through a connecting rod; the symmetric center of the cylinder body is coincided with the symmetric center of a flow passage of the valve cavity; the valve rod is fixed at the rear end of the cylinder body; a swing arm is fixed on the valve rod; and the other end of the swing arm is hinged with the piston of the valve core through a connecting rod. A valve core opening and closing mechanism has a piston structure, so that the pipeline can be extremely quickly cut off; and the conical surface at the front end of the valve core has a good flow distribution effect and low flow resistance, so that the valve can be stably operated and turbulence and vibration are avoided in the medium circulation process.

A transplanter boat deck assembly comprises a boat deck body and a tie ridger body on the bottom of the boat deck body, and is characterized in that the boat deck body and the tie ridger body are cavities provided with a lightweight water resisting material filler. The invention can effectively prevent adhesion of mud on the boat deck assembly during marching and turning and bury of inserted seedlings at two sides of the boat deck by the mud, in order to increase a survival rate of seedling and enhance transplanting quality. The transplanter boat deck assembly has a small friction surface with the paddy field and small resistance during working, so as to increase marching speed and transplanting efficiency; besides the transplanter boat deck assembly is wear resistant, corrosion resistant and with high strength, even the boat deck body and the tie ridger body are worn through, the foaming material can prevent the mud from entering the cavity to prolong a service life; and post assembling time and labor force are reduced; therefore the invention has substantial advantage.

An indoor temperature adjusting system comprises a heating or refrigerating system and indoor heat exchange pipes. The heating or refrigerating system comprises a tank (4) containing anti-freezing liquid, a heating or refrigerating main machine and a heat exchanger (5) used for heating or refrigerating the anti-freezing liquid in the tank (4). The heat exchanger (5) is located in the tank (4) and connected with the heating or refrigerating main machine. A water pump is arranged on a connecting pipe of the tank (4) and the heat exchange pipes. The indoor heat exchange pipes comprise a liquid inflow pipe (1.1), a liquid outflow pipe (1.2) and multiple flow division pipes (1.3) which are arranged between the liquid inflow pipe (1.1) and the liquid outflow pipe (1.2) in parallel. The diameter of each flow division pipe (1.3) ranges from 3 mm to 6 mm. The distance between every two adjacent flow division pipes (1.3) ranges from 3 cm to 5 cm. The two ends of each flow division pipe (1.3) are communicated with the liquid inflow pipe (1.1) and the liquid outflow pipe (1.2). The tank (4) is communicated with the liquid inflow pipe (1.1) and the liquid outflow pipe (1.2).

The invention provides a design method of low-specific speed centrifugal pump impeller splitter blades. The design method of the low-specific speed centrifugal pump impeller splitter blades comprisesthe steps that on an impeller plane projection drawing, an inlet and outlet polarization method is adopted to obtain a splitter blade inlet and outlet end point in an arc of a flow channel between adjacent long blades; the circle center is determined according to the impeller center and the splitter blade inlet and outlet end point, and used as an arc to connect the splitter blade inlet and outletend point to obtain a splitter blade pressure surface shaped line; the pressure surface shaped line is thickened through a dotting method to obtain a splitter blade suction surface shaped line, and the two shaped lines are closed to obtain a splitter blade preliminary model; and tip relief is carried out on the splitter blade inlet and outlet pressure surface. According to the design method of the low-specific speed centrifugal pump impeller splitter blades, the internal flow stability of an impeller can be effectively improved, impeller outlet flow field distribution under a non-design working condition is obviously improved, flow losses in the impeller are reduced, meanwhile, pressure pulsation caused by rotor-stator interaction between the impeller and a volute is reduced, and the working performance of a low-specific speed centrifugal pump is improved under the condition of not improving the cost.

The invention discloses a same-direction linear three-screw full-automatic production line for sealant, and relates to the field of chemical machine-sealant automatic production. The full-automatic production line comprises three screws, a speed change gear box, a side feeder, a vacuum buffer tank and a static mixer. The right end of the speed change gear box is provided with the side feeder, theside feeder is connected with a plurality of metering tanks at the upper end, the right end of the lower portion of the three screws is provided with the connected vacuum buffer tank, the right end ofthe three screws is sequentially provided with a condenser, a middle storage tank and the static mixer, and the condenser, the middle storage tank and the static mixer are sequentially connected through pipes, so that the three screws are sequentially divided into a feeding conveying zone, a kneading zone, a vacuuming zone, a vacuum kneading zone, a lowering zone, a splitting feeding zone and a dispersing conveying zone; and the same-direction linear three-screw full-automatic production line has the better diversion effect and more shearing time numbers, and therefore better distribution mixing and dispersion mixing are achieved.

Disclosed are an efficient-type corn niblet powder-making and caking-making system and a corn cake preparing method. The efficient-type corn niblet powder-making and caking-making system comprises a winnowing machine, a magnetic separator, a crushing and skinning machine, a crushing mechanism and a milling mechanism which are arranged in a treatment workshop, further comprises a batching tank anda puffing machine which are arranged in a puffing workshop, and further comprises a feeding channel and a finished product temporary storage tank. The feeding channel is formed in a downward-inclinedmode from the position, located on the outer side of the treatment workshop, of the ground, extends into the treatment workshop, and is connected with the bottom end of a first elevator in the treatment workshop. The refining effect is achieved through multi-link screening and then conveying and a multi-stage grinding and screening mechanism, so that feeding, powder-making, puffing and dischargingare conducted in different workshops, feeding and discharging are convenient to operate, the situation that operators are in the treatment workshop with loud noise is avoided, mutual interference ofpowder-making and puffing processes is avoided, noise reduction treatment is further conducted on key equipment, air pipes and an elevator channel, and the structure of the connecting position of theair pipes is improved to solve the situation of outage retention.

The invention discloses wheel disc type flow splitting equipment and an object flow splitting method and belongs to the technical field of logistics sorting. The equipment comprises a conveying device, a horizontal roller turnplate, a left oblique roller set and a right oblique roller set, wherein the conveying device is used for conveying objects; the horizontal roller turnplate is used for receiving the objects conveyed by the conveying device and comprises a first roller set, the first roller set comprises a plurality of parallel first rollers which are arranged in the turnplate and rotatesynchronously around self axes correspondingly, the objects are deviated after the turnplate rotates by an angle, and preliminary flow splitting is achieved; and the left oblique roller set and the right oblique roller set are used for receiving the objects conveyed by the roller turnplate, the left oblique roller set comprises a plurality of parallel left oblique rollers rotating synchronously around self axes correspondingly, the right oblique roller set comprises a plurality of parallel right oblique rollers rotating synchronously around self axes correspondingly, an obtuse angle is formedbetween the arranging directions of the multiple left oblique rollers and the multiple right oblique rollers and the conveying direction of the conveying device, the objects can be continuously conveyed outwards, and flow splitting is better achieved. The equipment and method can be used for achieving multi-path flow splitting, and flow splitting and sorting can be performed on special-shaped objects.

The invention discloses an air conditioner and a distributor thereof. The distributor used for the air conditioner comprises a distribution head with a distribution cavity defined, a liquid inlet pipe, and a plurality of distribution pipes, wherein the liquid inlet pipe is inserted into the distribution cavity from the bottom end of the distribution head, a plurality of throttling holes are formed in the peripheral wall of the liquid inlet pipe, and the top end of the liquid inlet pipe is sealed; the distribution pipes are inserted into the distribution cavity from the top end of the distribution head, and the distributor is arranged to make refrigerants in the liquid inlet pipe enter the distribution cavity after being throttled by the throttling holes and then be evenly distributed into the distribution pipes. The distributor can achieve the better even refrigerant distribution effect.

The invention belongs to the technical field of conveying devices, and particularly relates to a conveyor. The conveyor comprises a frame. A driving roller and a driven roller are arranged on the frame. The driving roller is connected with a motor. A conveying belt is arranged on the driving roller and the driven roller. Protecting plates are arranged on the frame and on two sides of the conveying belt. A plurality of notches are arranged on each protecting plate. A plurality of flow distribution grooves are connected to the notches respectively. A flow distribution plate is hinged to each notch and can block the corresponding notch. The length of each flow distribution plate is larger than the width of the conveying belt. By the conveyor, parts and finished products are enabled to be conveyed conveniently and rapidly, good flow distribution effect can be achieved, conveying quantity is large, and various different articles can be conveyed simultaneously.

The invention relates to a water jetting air pumping device. The water jetting air pumping device comprises an upper connecting pipe, an upper absorption chamber, a middle throat pipe and a lower diffusion chamber which are coaxially arranged up and down and communicated with one another; the upper and lower ends of the upper connecting pipe are provided with an upper flange A and a lower flange A, and the upper end of the upper connecting pipe is provided with a water inlet; the upper absorption chamber comprises an outer cylinder body and an annular-shaped shunting sieve, wherein the annular-shaped shunting sieve coaxially sleeves the interior of the outer cylinder body, and the side wall of the outer cylinder body is provided with an air inlet; a plurality of shunting small holes are evenly distributed on the side wall of the annular-shaped shunting sieve, and a pair of shunting big holes which are arranged symmetrically are formed in the side wall of the annular-shaped shunting sieve. The water jetting air pumping device has the advantages that the structure of the water jetting air pumping device is simple, compared with the traditional water jetting air pumping device, the water jetting air pumping device is characterized in that a shunting type absorption camber structure is adopted, a shunting sieve is arranged in the upper absorption chamber, when the air is pumped, the air is evenly absorbed after shunting, the pumping efficiency is improved, and the air pumping is more stable.