34results about How to "There is no problem of shedding" patented technology

The invention relates to a composite material core used for an enhanced cable, a preparation process and the enhanced cable. The composite material core comprises an inner core and an outer layer, wherein the inner core is composed of fiber and thermosetting resin; the outer layer comprises a fiber woven pipe and thermosetting resin which are composited to form the outer layer; and the fiber woven pipe of the outer layer is a network structure which is woven by interlacing a plurality of fiber bundles. The transversal strength of the composite material core is greatly improved by the interlaced network structure, the fatigue resistance of the composite material core is greatly improved, and the service life of the composite material core and a power transmission cable is prolonged; and the problem that the composite material core is broken when the composite material core is stranded, wound and extruded by a conductor in the manufacturing process of the cable is completely avoided. As the fiber woven pipe is adopted by the outer layer, the flexibility of the outer layer is greatly increased by the interlaced and woven structure, thereby meeting the requirement of manufacturing composite material core with major diameter.

The invention discloses a hexavalent chromium-wastewater treatment method integrating 'reduction, adsorption and magnetic removal'. The method comprises the following steps: anchoring a small-molecular phenolic acid compound to the surface, with a primary amine group, of a magnetic nano particle, to prepare a magnetic nano adsorbent; then controlling the ionization degree of a phenolic hydroxyl group on the surface of the adsorbent to realize automatic reduction, adsorption and magnetic removal of hexavalent chromium in the wastewater. The magnetic nano adsorbent realizes 'detoxification' of hexavalent chromium when separating the hexavalent chromium from the wastewater, and secondary pollution in the hexavalent chromium treatment process is avoided.

A manufacturing method of a semiconductor device according to the present invention includes the steps of (a) preparing an insulating or conductive substrate; (b) arranging a bonding material having sinterability in at least one bonding region of a principal surface of the substrate (i.e., insulating substrate); and (c) sintering the bonding material while a bonding surface to be subjected to bonding of at least one semiconductor element is brought into pressurized contact with the bonding material, and bonding the substrate (i.e., insulating substrate) and the semiconductor element together through the bonding material. The bonding region in the step (b) is inwardly positioned from the bonding surface (i.e., region) of the semiconductor element in plan view, and the bonding material is not protruded outwardly from the bonding surface of the semiconductor element in plan view even after the step (c).

The invention discloses a method for restraining membrane pollution of a carbon fiber paper-polyether sulfone compound conductive separation membrane in a cross-flow system by utilizing an auxiliary electric field. The method comprises the following steps: guiding a feeding liquor to flow in from one side above a cross-flow filtering mold; guiding one part to flow out from the other side above themold along a horizontal direction and using as effluent; guiding the other part to pass by the carbon fiber paper-polyether sulfone compound conductive separation membrane along a vertical direction,and then guiding leachate to flow out from the lower side of the mold. A separation membrane is placed in the middle of the mold; silica gel gaskets on the two sides are used for separating the mold;a polyether sulfone surface of the membrane is upward; one side of carbon fiber paper of the membrane is used as a cathode; a titanium sheet embedded under the mold is used as an anode; the two electrodes are separated by a silica gel gasket and are connected with a direct current power supply by wires; the range of applied direct current voltage is 0-3V; the membrane pollution caused by variouscharge pollutants can be effectively relieved under a combined action of electrostatic repulsion of electric field and shear force of water flow.

The invention discloses an in-situ preparation method for cadmium telluride/polyvinyl alcohol fluorescent fiber and relates to a preparation method for fluorescent fiber. The invention aims to solve the problems that in the prior method, the quantum dots of cadmium telluride reunite easily in a polymer solution, the fluorescence of the fiber is led to be non-uniform, so that the fluorescent effect is poor. The in-situ preparation method comprises the following steps: firstly, sodium borohydride, tellurium powder and deionized water are mixed and reacted to obtain sodium hydrogen telluride solution under the condition of ice-water bath; secondly, polyvinyl alcohol solution is added to a three-necked flask, nitrogen is introduced to the three-necked flask while the solution in the flask is stirred, then CdCl.2.5 H2O and mercaptoacetic acid are added to the flask, sodium hydroxide solution is dropwise added to the flask while the solution in the flask is stirred, then sodium hydrogen telluride solution is added to the flask, and the solution in the flask is subjected to heating and reflux, so that telluride/polyvinyl alcohol spinning solution is obtained; and thirdly, the spinning solution is subjected to static spinning, so that the fluorescent fiber is obtained. With the in-situ preparation method, the quantum dots of cadmium telluride can be uniformly scattered in polymer, and the prepared fluorescent fiber has good fluorescent effect. The in-situ preparation method is used for preparing the fluorescent fiber.

The invention relates to a heating element and a preparation method thereof, the heating element is formed by stacking a plurality of conductive layers and a plurality of insulating layers at intervals and integrally sintering, and the conductive layer is arranged on the outermost layer. The heating body provided by the embodiment of the invention is formed by compounding the plurality of conductive layers and the plurality of insulating layers, so that the heating temperature of the heating body is ensured to be uniformly distributed during heating, and the heating body has the characteristics of quick temperature rise, high heat efficiency, high heat conductivity and the like; the bending strength, fracture toughness and other properties of the whole heating body can be adjusted by adjusting the thickness of the ceramic insulating layer during preparation according to actual conditions, so that the heating body is not easy to break in actual application, and the service life is ensured; due to the fact that the conducting layers and the insulating layers are stacked at intervals and form a whole after high-temperature co-firing, the problem that the conducting tracks fall off in the using process does not exist, and the problem that the conducting tracks printed on an existing base body fall off after being used for a long time is solved.

A method for carving trademarker on sea cucumber includes such steps as choosing dried sea cucumber and laser carving.

The invention discloses an insulated wire coded by entity color bars and a preparation method thereof. The preparation method is characterized in that an outermost layer rubber jacket is set as fan-shaped entity zones with different colors in a zoning mode on the cross section of a wire; and the fan-shaped entity zones with the different colors are helical in the axial direction of the wire so as to form helical color bars at the periphery of the wire. The color bars of the invention can not drop and has exact color code and large coding capacity; and the preparation method of the invention is simple and reliable and has high production efficiency.

The invention belongs to the technical field of high-voltage electric power facility pole tower fasteners and particularly relates to a self-fastening type bolt. The self-fastening type bolt comprisesa bolt rod, a nut A, a nut B and a nut C, wherein the nut A, the nut B and the nut C are sequentially connected to the bolt rod. The nut A is fixedly connected to the top end of the bolt rod. The nutB and the nut C are in thread connection with the bolt rod. Matched large teeth are arranged on the contact faces of the nut B and the nut C correspondingly. Each large tooth on the nut B has a vertical edge and a bevel edge, wherein the inclination direction of the bevel edge is the same as that of a thread on the bolt rod, and the degree a of the included angle formed between the bevel edge ofeach large tooth of the nut B and the horizontal plane is larger than the degree b of the included angle formed between the thread on the bolt rod and the horizontal plane. The self-fastening type bolt is simple in construction and convenient to use, the self-fastening and falling-preventing effects are obvious, and the bolt can serve as a conventional connecting bolt for an electric transmissionline pole tower.

The invention discloses a portable single-person tea-leaf picker which comprises a tea-leaf picker body, a collecting box is arranged in the tea-leaf picker body, a conveying pipe cavity is fixedly connected to the upper side of the left end of the collecting box, a picking box is fixedly connected to the left end of the collecting box, and two moving blocks are arranged in the picking box in a bilateral symmetry manner; and rotating clamping plates are hinged to the left ends of the moving blocks, and two baffles are fixedly arranged on the left end face of each rotating clamping plate in a front-back symmetrical manner. According to the portable single-person tea-leaf picker, a pinch-off head of an existing single-person type tea-leaf picker is improved, no baffle is arranged on the front portion and the rear portion of an existing tea-leaf picking clamp, tender shoots of tea leaves fall off in the clamping process, and therefore resource waste is caused; and according to the portable single-person tea-leaf picker, in the picking process, the baffles are arranged on the front portion and the rear portion, springs are arranged between clamping plates, tea tender shoots can be restrained in the shearing process, the problem that the tea tender shoots fall off does not exist, resource waste is avoided while the tea quality is guaranteed, and economical influences on tea growersare avoided.

The invention relates to the technical field of engineering construction, in particular to a construction method of a gypsum cast-in-place wall. The construction method mainly comprises the following steps that according to the thickness of a wall to be built, light steel keels are selected and installed into a keel frame; gypsum boards are selected as wall panels, and the gypsum boards are laid on the two sides of the keel frame; preparing gypsum paste, and filling the gap between the two adjacent gypsum boards with the gypsum paste; and gypsum slurry is prepared and poured into the cavity mold box located between the gypsum boards on the two sides of the keel frame, and after the gypsum slurry is solidified, construction of the cast-in-place wall is completed. The construction technology is simple in step, convenient to operate and control and low in comprehensive wall building cost, industrial byproduct gypsum waste such as ardealite can be fully utilized, and waste recycling is achieved.

The invention discloses mechanical cleaning equipment, which comprises a cleaning equipment body composed of a cleaning device and a rod body, the cleaning device comprises a shell, side plates are fixedly connected to the two sides of the shell respectively, a conveying mechanism is arranged in the cleaning device, and a cleaning brush is arranged on the left side of the conveying mechanism. Thetop of the cleaning brush is fixedly connected with the interior of the shell, a dust sliding plate and a rolling mechanism are sequentially arranged at the bottom of the left side of the cleaning brush, the top of the dust sliding plate is fixedly connected with the interior of the shell, a dust sliding hole is formed in the middle of the dust sliding plate, a cleaning device is fixedly connectedwith the bottom of the inner wall of the shell, and the conveying mechanism comprises a conveying belt. The invention relates to the technical field of cleaning. According to the mechanical cleaningequipment, the problems that self-cleaning cannot be achieved, hair is prone to falling off, recycling cannot be achieved, garbage cannot be collected, and the ground cannot be sterilized and disinfected while the ground is cleaned are solved.

The invention relates to an optical glass element with a light absorption layer and a preparation method of the optical glass element, wherein the preparation method comprises the steps: pretreating optical glass to form a nano-scale or micron-scale gas diffusion channel on the surface of the optical glass; carrying out reduction treatment on the pretreated optical glass in a reducing atmosphere;and carrying out post-treatment on the optical glass subjected to reduction treatment to obtain the optical glass element with the light absorption layer. The optical glass element comprises an optical glass substrate and the light absorption layer, the light absorption layer is located on the periphery of the optical glass substrate, and the interface reflectivity between the light absorption layer and the optical glass substrate is smaller than 1%. The light absorption layer is a self-substrate light absorption layer, and the light absorption rate of the light absorption layer is greater than 99%. According to the preparation method, the problem that the light absorption layer is difficult to prepare in the optical glass with a compact structure is solved, and the problem that the lightabsorption layer falls off after being heated or subjected to external acting force does not exist.

The invention discloses an electrode plate preparation method applied to an all-vanadium redox flow battery, which comprises the following steps: S01, a first powder raw material and a mixing auxiliary agent are mixed to obtain a premixed raw material, wherein the first powder raw material comprises carbon black powder, graphite powder and carbon nanotube powder, and the mixing auxiliary agent isa powder silane coupling agent; S02, the premixed raw material and the second power raw material are mixed to obtain a composite material, wherein the second powder raw material comprises HDPE powder,PP powder and SEBS powder; S03, the composite material is imported into a blanking device, the composite material is mixed in the screw mixing section of an extruder at a mixing temperature of 200 DEG C to 225 DEG C; and S04, the extruded and mixed composite material is calendered to form a 0.6 mm electrode plate. The invention also discloses an electrode plate and a preparation device for the electrode plate.

The present invention provides an installation fixing method of a lithium battery pack protection plate and a device thereof, and belongs to the field of lithium ion batteries. The invention solves the existing problems such as high cost in fixing a protection plate and a battery pack bracket with screws and glue. The installation fixing method of the lithium battery pack protection plate comprises the following steps: S01, the protection plate is put on the battery pack bracket; S02, the protection plate is pressed and pushed and a fixture block of the protection plate slides into a slot of the battery pack bracket so that the fixture block and the slot are engaged. The invention has the advantages such low cost and firm fixation.