32results about How to "Reduce diameter size" patented technology

The present invention relates to a method for forming metal-silicide catalyst nanoparticles with controllable diameter. The method according to embodiments of the invention leads to the formation of ‘active’ metal-suicide catalyst nanoparticles, with which is meant that they are suitable to be used as a catalyst in carbon nanotube growth. The nano-particles are formed on the surface of a substrate or in case the substrate is a porous substrate within the surface of the inner pores of a substrate. The metal-silicide nanoparticles can be Co-silicide, Ni-silicide or Fe-silicide particles. The present invention relates also to a method to form carbon nanotubes (CNT) on metal-silicide nanoparticles, the metal-silicide containing particles hereby acting as catalyst during the growth process, e.g. during the chemical vapour deposition (CVD) process. Starting from very defined metal-containing nanoparticles as catalysts, the diameter of grown CNT can be well controlled and a homogeneous set of CNT will be obtained.

To provide an outer rotor type motor configured so that the lead wires of the winding coils for the stators are routed simply. An outer rotor type motor is provided with stators arranged in the axial direction, a rotor supported so as to rotate around the stators, a drive shaft provided integrally with the rotor, winding coils respectively wound on the stators, and magnets affixed to the rotor so as to respectively correspond to the stators. The outer rotor type motor is configured so that the rotor and the drive shaft are rotated by the magnetic action between the winding coils and the magnets. A penetration portion extending in the axial direction is provided in at least one of the stators, and the lead wires of the winding coils are inserted through the penetration portion and led to the outside.

The invention discloses a mineral insulated metal sheath fireproof cable and a preparation method thereof. The cable comprises a cable core, a mineral matter oxygen barrier layer, an inner flame retardation layer, a mineral matter fireproof expansion layer, a metal reinforcing layer, an outer flame retardation layer and an oversheath; the cable core comprises insulating cores, and each insulating core is wrapped in an aluminum metal sheathe and an anticorrosion plastic layers successively; a mineral matter insulation layer services as an external layer of each insulating core, and internally provided with metal conductors; and the cable core is wrapped in the mineral matter oxygen barrier layer, the inner flame retardation layer, the mineral matter fireproof expansion layer, the metal reinforcing layer, the outer flame retardation layer and the oversheath successively. The cable of the invention can reach the CWZ grade of BS6387 standard, and satisfy 2h of fireproof bump test prescribed by the BS8491 standard, the production speed is high, the whole cable can be produced in a continuous and long manner, onsite installation technology is simple, and the cable can be applied to power distribution, illumination, control and alarm systems requiring for circuit completeness.

A device making it possible considerably and remotely to reduce the diameter of the rotor of a wind generator (1) includes a connecting piece (5) connecting the blade (6) to the hub (4) of the wind generator (1), the central axes (B1-B2) of the respective ends (5.1-5.2) of which components form a certain angle (α), the end (5.1) is able to rotate about its central axis (B1) causing the blade (6) to pivot and once the blade has pivoted it is inclined toward the nacelle (3). When the blade (6) is inclined in this way, the connecting piece (5) and the rotor are immobilized, forming the position in which the wind generator (1) is protected. The device is intended to allow optimum and safe operation of the wind generators in regions subjected to violent winds.

A technology for manufacture automobile modular wiring harness include such steps as removing six wires and six terminal, crimping one end of each wire to that terminal, and pulling out force of the terminal to 150N, removing the six wires and the six terminals from the automobile modular wiring harness, removing the six wires and the six terminals from the automobile modular wiring harness. Passing one end of the unpressed terminal of the conductor through the sheath and placing the terminal in the sheath; Push the sealing ring down to the bottom after the clamping groove of the straightenercorresponds to the protective sleeve; Install the raised part of the locking cover inward into the sheath; Straightener is flush with the sheath plane before welding, and then the locking cover is welded on the sheath; The O-type snare is interposed on the connecting part of the engine cylinder at the lower end of the protective sleeve; Straighten out the six wires and clamp the pair of wires against the strander. The strand pitch is 25-35mm; The conductor is pierced through a high-temperature-resistant heat-shrinkable pipe, the heat-shrinkable pipe is blown, and one end of the conductor unpressed terminal is crimped to the terminal; Heat sealing at a distance of 5mm from the terminal head of the heat shrinkable tube; Bend the terminal by 80 DEG, leveling the wire harness, and inspect thewire harness using the inspection original.

The invention relates to a tubular workpiece electroplating rack. The tubular workpiece electroplating rack comprises a bracket, a horizontal rod mounted on the bracket and a plurality of groups of limiting parts which are fixedly arranged on the horizontal rod in an axially spaced mode, wherein each group of limiting parts comprise a plurality of limiting parts which are arranged in a spaced modein the peripheral direction; each limiting part comprises a spring, a circular-arc-shaped plate fixed with the spring, a through hole is formed in the circular-arc-shaped plate; and a plurality of cross rods separately pass through the through holes on the same axis. Through the springs, the circular-arc-shaped plates abut against the inner walls of the tubular workpieces, and the springs enableforce to achieve balance, so that rotation of the tubular workpieces is avoided, electroplating is uniform, electroplating quality of the tubular workpieces is improved; the cross rods are arranged for integrally connecting the limiting parts with the cross rods, so that operation on the limiting parts is performed while operation is performed on the cross rods, and therefore, convenience and quickness of operation are improved, and working efficiency is improved.

An artificial Christmas tree connection structure includes a branch connection base and branch shaft units, the branch connection base coupled at a tubular main trunk body, the branch shaft units being selectively adjusted the orientations thereof to hang at the branch connection base. The branch connection base, having a tubular configuration, has a plurality of first limitation indentions and a plurality of connection slots. The branch shaft unit has a metal shaft, wherein a connecting end portion of the shaft is bent to form a hook connector, wherein tree leaves are provided at the shaft. The hook connector passes through the first limitation indentions, the second limitation indentions, and the connection slots to hang the branch shaft unit at the branch connection base. The connection structure provides an ease of assembling, high production efficiency, low manufacturing cost, reliable connection, detaching prevention, and adjustment of the orientation of the branch.

The invention discloses a folding wing which comprises at least two wing panels. The wing panels are connected with one another, every two adjacent wing panels are connected with each other by a hinge seat, and the wing panels which are positioned on the innermost side of the folding wing are connected with a fuselage by hinge seats; an unfolding mechanism is arranged between every two adjacent wing panels and is used for unfolding the wing panels towards the directions far away from the fuselage, and unfolding mechanisms for unfolding the wing panels towards the directions far away from the fuselage are arranged between the fuselage and the wing panels which are positioned on the innermost side of the folding wing; through holes are formed in butted joints of each hinge seat and the lower end of the corresponding wing panel, and locking mechanisms are arranged in the through holes; limiting mechanisms are arranged on the lower surface of a hinge joint of every two adjacent wing panels and can prevent the wing panels from rotating to reach positions below horizontal planes. The folding wing has the advantages that the diameters of model airplanes can be reduced to the greatest extent during launching and transporting, and the folding wing is easy to control.

The invention belongs to the field of an endoscope and provides a submillimeter-diameter ultrafine endoscope based on high-illumination lighting fibers. The submillimeter-diameter ultrafine endoscopecomprises two lighting fibers, a front-end fixation clamp, an external plastic protection cover, an image transmission assembly, a cold light source and a display terminal. The front-end fixation clamp is arranged in the external plastic protection cover and is located at the front end thereof; the front ends of the two lighting fibers and the front end of the image transmission assembly are fixedly arranged in the front-end fixation clamp through epoxy resin glue; the back ends of the lighting fibers pass through the external plastic protection cover and is connected with the cold light source; the cold light source provides light for the endoscope through the lighting fibers; and images collected by the image transmission assembly are displayed through the display terminal. The submillimeter-diameter ultrafine endoscope can meet an illumination condition of 2000 illumination of the endoscope by using only two high-illumination lighting fibers, thereby reducing overall size of the endoscope and realizing submillimeter-diameter superfine fiber / electronic endoscope.

The invention discloses a melt-blowing device with double-electrode high-voltage electrostatic spinning. The melt-blowing device mainly comprises a melt-blowing mold head supporting frame, a melt-blowing upper mold head, a melt-blowing lower mold head, a shuttle-type electrode plate, an electrode plate conductor sheet, a supporting frame adjusting net, a bellows adjusting nut, a suction air box and a porous electrode plate, wherein the melt-blowing mold head supporting frame is used for supporting and fixing the melt-blowing upper mold head, the melt-blowing lower mold head and the shuttle-type electrode plate; and the high-voltage electrostatic field force is applied between the melt-blowing upper mold head and the shuttle-type electrode plate, the high-voltage electrostatic field force is applied between the shuttle-type electrode plate and the porous electrode plate, the two times of high-voltage electrostatic field force are used as auxiliary action force to draw and refine fibers,and the diameter size and distribution of polymer fibers are advantageously reduced. Before the fibers are cured, a double-electrode high-voltage electrostatic field polarizes the fibers, electric charges can be remained in a fiber layer for a long time, and the dipolarity aging of the fibers is long; and the application of double electrodes simultaneously solves the problems of large fiber diameter, wide diameter distribution range, high energy consumption and short dipolarity aging.

The invention discloses a long-shaft molten salt pump which comprises a motor frame, a bearing box, a bearing box bracket, a water outlet seat, a mounting bottom plate, a connecting pipe, a pump section and a water inlet and is characterized in that the pump section is divided into a first-stage pump section and a second-stage pump section; the first-stage pump section is arranged at the lower endof the pump shaft; the lower part of the first-stage pump section is connected with the water inlet; the secondary pump section is arranged below the mounting bottom plate; the first-stage pump section is internally provided with a group of impellers and guide blades; and the secondary pump section is internally provided with four groups of impellers and guide blades. With the structure, the existing structural form that the pump section is arranged at the lower end of the pump shaft is improved into a structural form that the secondary pump section is arranged below the mounting bottom plate, and mass distribution of the pump and a stress point of an unbalanced force are changed, so that reasonable mass distribution and unbalanced stress point are realized, and improvement on operation stability of the long-shaft molten salt pump is realized.

The invention discloses an electromagnetic field system for a magnetic refrigerator. The system comprises an electromagnetic coil, an L-shaped iron core, a column iron core, a power supply and a mounting rack, wherein the electromagnetic coil, the L-shaped iron core and the column iron core are mounted on the mounting rack; the L-shaped iron core and the column iron core are matched to form a C-shaped iron core, the electromagnetic coil winds one side of the C-shaped iron core, the electromagnetic coil is electrified to generate a magnetic field, and the magnetic field magnetizes the C-shapediron core; the power supply is connected to a wiring terminal of the electromagnetic coil to output a direct voltage; and an air gap is formed between the L-shaped iron core and the column iron core,the width of the air gap can be adjusted, and an active magnetic heat regenerator in the magnetic refrigerator is mounted in the air gap. The system disclosed by the invention can provide the periodically stable magnetic field to a magnetic working medium and the magnetic response characteristic can be adjusted conveniently.

The invention discloses a mineral insulated metal sheathed fire-resistant cable, a manufacturing method and application thereof. The cable includes a plurality of insulated wire cores arranged inside, an aluminum metal sheath coating the wire cores, an anticorrosive plastic layer, a mineral oxygen insulation layer, a first flame-retardant layer, a mineral fire-resistant expansion layer, a metal reinforcing layer, a second flame-retardant layer and a low-smoke halogen-free flame-retardant outer sheath, wherein the anticorrosive plastic layer, the mineral oxygen insulation layer, the first flame-retardant layer, the mineral fire-resistant expansion layer, the metal reinforcing layer, the second flame-retardant layer and the low-smoke halogen-free flame-retardant outer sheath sequentially coat the outer layer of the aluminum metal sheath, and the insulated wire cores are metal conductor coated with mineral insulated layers. The method includes the following steps that: metal conductors are wrapped with a mineral insulated material, so that insulated wire cores can be obtained; the insulated wire cores are stranded to form a cable core; the cable core is wrapped with aluminum metal continuously through extrusion; an obtained aluminum metal sheath is wrapped with anticorrosive plastics and a mineral oxygen insulation material sequentially through extrusion; an obtained mineral oxygen insulation layer is wrapped with a flame-retardant material; an obtained flame-retardant layer is wrapped with a mineral fire-resistant expansion material through extrusion; metal wires are woven on an obtained mineral fire-resistant expansion layer; an obtained metal reinforcing layer is wrapped with a flame-retardant material; and an obtained flame-retardant layer is wrapped with a low-smoke halogen-free flame-retardant material. The mineral insulated metal sheathed fire-resistant cable of the invention has the advantages of fast production speed, long length and excellent waterproof, fire-resistant, flame-retardant and anti-collision performance.

The invention provides an azimuthal rolling track grinding device for a magnetic hanging steel ball, and relates to machining equipment, in particular to special equipment for rolling track grinding processing of an azimuthal steel ball. The device comprises a connecting body of which the tail end is provided with a connecting hole, and is characterized in that: the side wall at the working end of the connecting body is provided with a magnetic hanging device, of which the inside is provided with permanent magnets; steel balls are matched with the permanent magnets in number and magnetically hung on the permanent magnets; and a compression spring is arranged between the magnetic hanging device and a convex surface on the tail part of the connecting body. In the device, the permanent magnets are used for separating the steel balls and avoiding the falling-off of the steel balls, and the friction force is used for driving the steel balls to roll to grind a rolling track. The device has the advantages that: 1, wearing parts are not adopted, so that the mechanism is not easily damaged; 2, the requirements on the diameter of the steel balls and the working section of the rolling track are not high, and the minimum diameter of the steel balls can be less than 1 mm, so that the device has a wide application range; 3, the steel balls can be conveniently replaced; and 4, the axiality is high in the double-sided grinding operation.

The invention discloses a piston type flow regulating valve. The piston type flow regulating valve comprises a valve body, a valve cavity is formed in the valve body, an inlet pipe is arranged at theleft end of the valve body, an outlet pipe is arranged at the right end of the valve body, a valve block is fixedly arranged in the outlet pipe, a valve hole is formed in the valve block, a convex block is arranged on the inner side wall of the valve cavity in an extending mode, a valve groove is formed in the convex block, a convex shaft is arranged in the valve groove, a shaft hole is formed inthe convex shaft, a valve rod is arranged in the shaft hole, a spiral groove is formed in the outer side of the valve rod, a first convex column is arranged on the side wall of the shaft hole, a valveclack is arranged at the right end of the valve rod, a first valve cylinder is arranged in the valve cavity, a second valve cylinder is connected in the first valve cylinder in a rotating mode, a blind plate is arranged at the left end of a second valve cylinder, the valve rod is provided with a rotary drum, the outer side of the rotary drum is sleeved with a sleeve, a convex ring is arranged onthe left side of the blind plate in an extending mode, a driving assembly is arranged on the valve body, and a transmission assembly is arranged among the rotary drum, the sleeve and the convex ring.The piston type flow regulating valve has the advantages of being reliable in sealing and compact in size.

The invention discloses a disposable single-channel reducing percutaneous kidney guiding suite, and relates to the technical field of percutaneous nephroscope puncture channel sheaths, the disposable single-channel reducing percutaneous kidney guiding suite comprises a guiding sheath, and is characterized in that the middle section of the guiding sheath is a reducing section, the diameter of the rear section of the guiding sheath is larger than that of the front section of the guiding sheath, and the diameter of the rear section of the guiding sheath is larger than that of the front section of the guiding sheath. A water outlet is formed in the end of the rear section of the guide sheath, the single J ureteral catheter comprises a variable-diameter catheter and a J-shaped catheter, the short-diameter end of the variable-diameter catheter is communicated with the J-shaped catheter, and a water inlet connector is arranged at the long-diameter end of the variable-diameter catheter in a communicated mode. According to the percutaneous nephroscope system, the percutaneous nephroscope operation with a smaller channel is met, meanwhile, low-pressure continuous water circulation of the renal pelvis in the operation is achieved, and therefore the problems that in the prior art, the diameter of the renal channel in the percutaneous nephroscope operation is large, and water cannot flow in and out continuously and circularly are solved.

The invention relates to a pilot-operated hydraulic control cut-off valve, which is characterized in that it comprises a valve body, on which a third oil port and a fourth oil port are opened; a valve seat, on which a first oil port, a second oil port port; the first bushing, the second bushing and the spool, the spool divides the inner chamber of the second bushing into the oil chamber and the control chamber, the left and right sliding of the spool can open and close the first oil port, and the second oil port in the spool A flow hole, the first spring is provided in the oil return chamber; the first bush is in the shape of a stepped shaft, and a balance chamber is formed at the right end of the thin shaft part of the first bush; a second flow hole is opened on the first bush , the third flow hole, the left and right sliding of the valve core can open and close the first oil port; the side wall of the second bushing has a first damping hole and a second damping hole; The pilot valve assembly, whether the pilot valve assembly is opened or not determines whether the third oil port communicates with the second flow hole. The invention has the advantages of simple and reasonable structure, low manufacturing cost, reliable cut-off, compact volume and small impact.

The invention discloses a railway vehicle welding intelligent control system and method. The railway vehicle welding intelligent control system comprises an input unit, a parameter acquisition unit, a parameter output unit and a control unit, wherein the input unit, the parameter acquisition unit and the parameter output unit are respectively connected with the control unit; the control unit comprises a welding rod type diameter determination module, a welding current determination module, an arc voltage determination module, a welding speed determination module and a real-time correction module, by optimizing and correcting the current, the arc voltage and the welding speed, the influence of subjective factors of welding workers is avoided, and the reliability of the welding quality is improved.

A compact axial turbine configured to operate with high density working fluid is described. The turbine comprises an axial majority cantilevered turbomachinery shaft. Rotor assemblies and nozzle spacers communicate torque through turbine shaft splines, allowing them to be slid off the shaft for quick replacement in the field. The compact axial turbine houses turbomachinery within a separable inner casing encircled by a cartridge sleeve, thereby forming a cartridge which can itself be removed as a single component.