898results about How to "Easy to bend" patented technology

The invention discloses an impact-resistant and distortion-resistant outdoor polyethylene power cable, and relates to the technical field of cables, the impact-resistant and distortion-resistant outdoor polyethylene power cable comprises a cable core, four annularly distributed wire cores are arranged in the cable core, each wire core is composed of an inner-layer conductor, an outer-layer conductor, a heat conduction enhancement layer, an inner enhancement layer and an inner insulation layer, a shielding combination layer is arranged outside a wrapping layer, and a shielding layer is arranged outside the wrapping layer. The shielding combination layer is composed of a high-conductivity metal thin film layer, a nanometer shielding layer and a protective coating, the anti-impact combination layer is arranged outside the shielding combination layer, the anti-impact combination layer is composed of an impact dispersion layer and an energy absorption layer, the anti-distortion combination layer is arranged outside the anti-impact combination layer, and the anti-distortion combination layer is composed of an impact dispersion layer and an energy absorption layer. The anti-distortion combination layer is composed of a core layer and an elastic buffer layer, an outer sheath is arranged outside the anti-distortion combination layer, and the outer sheath is composed of a reinforcing layer, a blocking layer and an outer protective layer, so that the problems that the power cable is poor in impact resistance and distortion resistance and inconvenient to maintain are solved.

The invention provides a method for testing the dynamic strain of the surface of a rotating body in an electromagnetic environment. The method comprises the following steps: constructing a bridge by using strain gauges and acquiring dynamic characteristic data of the rotating part under actual constraint conditions; performing simulation calculation according to the dynamic characteristic data, and determining the optimal pasting position of the strain gauge; pasting a strain gauge and formulating a wiring scheme of a strain gauge wire; the strain gauge is connected with a voltage signal amplifier, the amplified signal is connected with a data acquisition system through a conductive slip ring, and the amplified strain signal is recorded and processed; acquiring strain signals in real time and taking the strain signals as test data, and performing whole-course test in a full-rotating-speed range to complete dynamic strain test on the surface of the rotating body. The system has high sensitivity, the sensitivity and the measurement precision of the system are improved through full-bridge configuration, larger output signals are provided, the full bridge can achieve temperature compensation through symmetrical circuit design, and the system has good linear output characteristics and facilitates signal processing and analysis within the strain range.

The invention discloses a wear-resistant tensile power cable and a preparation method thereof, and relates to the technical field of power cables, the wear-resistant tensile power cable comprises a wire core, the interior of the wire core is a stranded wire structure formed by stranding a plurality of copper wires, the exterior of the wire core is coated with a crosslinked polyethylene insulating tube, and a centering assembly is fixedly installed on the outer surface of the wire core. According to the wear-resistant tensile power cable and the preparation method thereof, the hemp rope is filled in the special-shaped pipe for centering and stabilizing the whole structure, the silica gel coating is filled in the special-shaped pipe, an inner layer centering structure is formed after the coating is shaped, and the cable particles easy to flow are filled between the inner side surface of the special-shaped pipe and the special-shaped pipe. The cable particles improve the overall stability of the cable, and at the same time, when the outer layer protection structure is broken by tensile force, the inner layer centering structure is not damaged by tensile force, thereby solving the problem that the tight fixed connection between the outer layer protection structure and the inner layer centering structure of the cable easily causes the overall cable to be broken by tensile force and causes serious accidents.

The invention provides a display screen and electronic equipment. The display screen comprises a display module and a display module, wherein the display module comprises a cambered surface section and a plane section; the supporting plate comprises a first supporting section, a second supporting section and a third supporting section, the second supporting section is located between the first supporting section and the third supporting section, the first supporting section is attached to the plane section, the second supporting section, the third supporting section and a connecting gap between the second supporting section and the third supporting section form a bent section, and the bent section is attached to the cambered surface section; the surface of the second supporting section is provided with a concave area, the hardness of the second supporting section is smaller than that of the first supporting section, and the hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section. The second supporting section is provided with a concave area, so that the hardness of the second supporting section is smaller than that of the first supporting section, and bending of the second supporting section is facilitated. The hardness of the third supporting section is smaller than that of the first supporting section or the second supporting section, bending of the third supporting section is facilitated, attaching of the bent section and the cambered surface section is facilitated, and the problem that the supporting plate and the display module are prone to falling off is solved.

The invention discloses a preparation method of a high-temperature-resistant, high-strength, high-electric-conductivity and high-heat-conductivity copper-niobium heterogeneous nano composite fine filament, which comprises the following steps of: 1, winding a copper strip and a niobium strip, placing the wound copper strip and niobium strip in a copper sheath, carrying out homogeneous heating and isothermal hot extrusion deformation, and then carrying out multi-pass straight drawing, intermediate annealing and disc drawing to obtain a copper-niobium composite wire; 2, bundling and assembling the copper-niobium composite wires, placing the copper-niobium composite wires in a copper sheath, carrying out homogeneous heating and isothermal hot extrusion deformation, and then carrying out multi-pass straight drawing, intermediate annealing and disc drawing to obtain a copper-niobium multi-core composite round wire; and 3, performing multi-pass drawing and vacuum annealing on the copper-niobium multi-core composite round wire in sequence. The ultra-plastic deformation process combining copper and niobium winding combination with cluster drawing is adopted, the fine wire with high tensile strength, good bending and tensile plasticity, excellent high-temperature thermal stability and high-temperature stress relaxation resistance, excellent radiation resistance and excellent strong current matching is obtained, the process is simple, control is easy, and the method is suitable for industrial production. The industrial batch production is easy to realize.

The invention provides a grass seed spray-seeding device for landscaping, and belongs to the technical field of seeding equipment.The grass seed spray-seeding device comprises a rack used for being fixedly installed on a carrying vehicle body; the snake bone pipe is movably arranged on the rack and extends out of the rack, the snake bone pipe comprises a plurality of joints which are arranged in a mutually hinged mode, and the joints jointly form a hollow tubular structure; the feeding hose is arranged in the multiple joints in a penetrating mode, a plurality of discharging spray heads are arranged on the feeding hose, and the multiple discharging spray heads penetrate out of the joints and right face the ground; the first feeding assembly is used for storing and conveying grass seeds to the feeding hose; the driving assembly is used for driving the snake bone pipe to be bent in the vertical direction and fixed to the bent position. The grass seed sowing device can effectively solve the problem of adaptation of existing sowing equipment in a downwards-bent or upwards-protruding terrain, efficient and uniform grass seed sowing is achieved, and the greening effect is improved.

The utility model provides a washing machine shell pre-bending device which comprises a base plate, a clamping mechanism used for clamping a piece to be bent is arranged on one side of the base plate, a bending mechanism is arranged on the other side of the base plate, the bending mechanism comprises a vertical plate arranged on the base plate, and a lifting moving platform is arranged on the vertical plate. A fixing plate is arranged on the lifting moving platform, a bending groove used for supporting a part to be bent is formed in the fixing plate, a bending roller is arranged on the upper portion of the fixing plate in a sliding mode, and a correction roller is rotationally arranged on the inner side wall of the side, close to the clamping mechanism, of the bending groove. According to the utility model, the clamping mechanism can be used for clamping and fixing a piece to be bent, and then the lifting moving platform is used for conveniently and quickly adjusting the height and the position of the bending mechanism, so that the bending operation of products with various diameters and radians is facilitated, the defective rate of the products is greatly reduced, and the production efficiency is improved. And the product quality and the bending efficiency are improved.

The utility model relates to a contact distribution force information detection system for an automobile crash dummy model. The system comprises a dummy model, and flexible touch sensors arranged at the head, neck, chest, upper limbs, hip, lower limbs and / or feet of the dummy model. The flexible touch sensor comprises an upper electrode layer, a lower electrode layer, an anti-tear flexible plastic packaging layer and an ion fiber layer placed between the upper electrode layer and the lower electrode layer. And the tear-resistant flexible plastic package layer wraps and packages the upper and lower electrode layers and the ion fiber layer. The whole body of the crash test model dummy is full of the flexible touch sensors, contact distribution force information of the crash test model dummy can be directly obtained, the defect that the current crash dummy lacks the contact distribution force information is overcome, and the crash test model dummy is low in cost and easy to operate.

The invention relates to the technical field of pipe machining, and discloses an automatic numerical control multi-section pipe bending device which comprises a machine tool, a numerical control case arranged on the machine tool, a pipe bending transmission mechanism arranged on the machine tool, a pipe bending adjusting mechanism arranged on the machine tool and a pipe bending mechanism arranged on the pipe bending adjusting mechanism. The pipe bending mechanism comprises a pipe bending base, a driving assembly is arranged in the pipe bending base, and a pipe bending assembly is rotationally installed on the pipe bending base. According to the automatic numerical control multi-section bending device for the pipes, through cooperation between the pipe bending transmission mechanism and the pipe bending mechanism, the pipes can be bent to a preset angle, and meanwhile, through arrangement of the angle adjuster, angle adjustment can be conducted on the pipe clamping device and the pipes according to machining requirements; through the arrangement, after one-time bending operation of the pipe is completed, the orientation of the pipe can be changed by adjusting the angle adjuster, and therefore multi-section bending and diversified bending machining of the pipe are achieved.

The invention relates to the technical field of aviation optical cables, in particular to a high-temperature optical cable for aviation and a preparation method of the high-temperature optical cable for aviation, and the high-temperature optical cable for aviation comprises a high-temperature optical fiber, a stainless steel loose sleeve protection tube, a fiber-woven reinforcement piece and a high-temperature-resistant polymer sheath, the stainless steel loose tube protection tube is sleeved with the fiber woven reinforcing piece, and the fiber woven reinforcing piece is sleeved with the high-temperature-resistant polymer sheath; according to the technical scheme, the temperature resistance grade of the aviation optical cable can be improved to 300 DEG C, and the product is small in structural size and light in weight and has good use characteristics of tensile strength, compression resistance, bending resistance and the like.

The utility model relates to electronic equipment which comprises a shell, a screen, a heating device, a heat conduction assembly and a heat conduction connecting piece, the shell comprises a middle frame and a rear cover, the screen is installed in the middle frame, the rear cover and the screen are distributed on the two sides of the middle frame in the thickness direction of the electronic equipment, and the heating device is located in a containing cavity of the electronic equipment. The heat conduction assembly is connected with the heating device and connected with the screen and / or the rear cover. The heat conduction connecting piece is connected with at least part of the heat conduction assembly, so that the heat dissipation channels formed by the heat conduction assembly are connected in parallel, heat of the heating device can be uniformly conducted to each heat dissipation surface of the electronic equipment, the temperature uniformity of each heat dissipation surface of the electronic equipment is improved, the risk of local high temperature of the electronic equipment is reduced, and the service life of the electronic equipment is prolonged. And the holding experience of the user is improved. Meanwhile, thermal resistance can be reduced, heat dissipation efficiency is improved, and the service life of the heating device and the electronic equipment is prolonged.

The invention provides a design method of a variable-size variable-density lattice structure wing with optimized heat dissipation load, and relates to the technical field of aerospace engineering, and the design method comprises the following steps: S10: carrying out variable cross-section design on a D-type unit to obtain a variable cross-section D-type unit, taking the variable cross-section D-type unit as a lattice unit configuration, and filling the wing to form a skin lattice structure; the skin lattice structure of the wing comprises a skin and a lattice filling area; s20, cell element variable-size design is adopted for the dot matrix units, and variable-size dot matrix units are constructed; s30, according to the stress field of the wing, cell element variable-density design is adopted for the variable-size dot matrix units, and variable-size variable-density dot matrix units are constructed; and S40, establishing a wing configuration. The variable-cross-section D-type unit is used as a dot matrix unit configuration, deep coupling of integrated design of heat dissipation and bearing performance is achieved through variable-size and variable-density design, application scenes are flexibly adjusted, and complex working condition requirements are met.

The invention relates to the field of medical instruments, in particular to an artificial valve prosthesis replacement system which comprises a valve support and a conveying system used for conveying the valve support, and a valve leaflet clamping mechanism and an anchoring ring connected with the valve leaflet clamping mechanism are arranged on the valve support. The conveying system comprises an outer sheath tube, an inner core tube, a control wire and a connecting mechanism, the connecting mechanism comprises a connecting piece and a protection piece arranged at the far end of the connecting piece, the far end of the inner core tube is fixedly connected with the connecting piece, and the valve leaflet clamping mechanism is detachably connected with the connecting mechanism through the control wire; according to the scheme, the connecting mechanism is matched with the control wire, so that the conveying instrument and the valve support are of a stable and controllable detachable structure, opening and closing of the clamping arms can be controlled, the loading pipe diameter can be reduced, recycling is achieved, intracardiac adjustment is facilitated, and good clinical significance is achieved.

The utility model discloses a high-efficiency steel bar bender, and relates to the technical field of steel bar machining. The high-efficiency steel bar bending machine comprises a bending mechanism, a feeding mechanism and a positioning assembly, a guide rail is arranged at the side end of the bending mechanism, a lead screw is movably installed in the guide rail, one end of the lead screw is fixedly connected with a second motor, the feeding mechanism is in threaded connection with the lead screw, and the positioning assembly is fixedly connected with the feeding mechanism. Sliding rods are symmetrically arranged at the left end and the right end of the lead screw, and the feeding mechanism is in sliding connection with the sliding rods. In order to overcome the defect that the bending machine cannot stably clamp a plurality of steel bars, the tail ends and the bent ends of the steel bars can be clamped through the two positioning assemblies, so that the steel bars can be kept horizontal, the clamping stability is improved, the steel bars can be driven to move front and back through the feeding mechanism, and the clamping stability is improved. And the to-be-bent part of the reinforcing steel bar can be finely adjusted conveniently, manual calibration is avoided, and the working efficiency is improved.

The utility model discloses a two-wire-harness integrated fixing structure which comprises a plastic plug and a rubber sleeve, the plastic plug comprises a limiting lantern ring and two guide arms which coaxially extend, the limiting lantern ring is provided with a first opening, the two guide arms are connected to the same side of the limiting lantern ring in a symmetrical distribution mode, and the rubber sleeve is provided with a second opening. The two guide arms are matched to form two limiting channels which communicate with each other and are symmetrically distributed in a circular shape, second openings are formed in the other ends, communicating with each other, of the two limiting channels, and the second openings and the positions, communicating with each other, of the two limiting channels all directly face the first opening. A communicating gap between the two limiting channels is far smaller than the maximum inner diameter of the limiting channels, the rubber sleeve is arranged on the surface of the guide arm in a sleeving mode, and a limiting structure is arranged on the outer surface of the rubber sleeve. The integrated fixing structure for the two wire harnesses can effectively fix the two wire harnesses, and is low in cost and good in fixing effect.

The utility model discloses a pipe fitting bending machine bending die assembly which comprises a base, the upper end of the base is rotationally connected with a bending wheel through a rotating shaft, a fixing block is installed at the upper end of the bending wheel, a telescopic handle is installed at one end of the fixing block, a clamping wheel is movably installed at the other end of the fixing block, and a movable plate is movably installed on the base on one side of the bending wheel. The upper end of the moving plate is rotatably connected with a limiting wheel through a rotating shaft, a measuring assembly is installed at the upper end of the base between the limiting wheel and the bending wheel, angle scales are distributed at the upper end of the base below the bending wheel, an L-shaped plate is installed at the bottom end of the bending wheel, and a limiting block is movably installed outside the angle scales. By arranging the measuring assembly, when the pipe fitting is placed, one end of the pipe fitting is used for pushing the push plate in the measuring assembly, the push plate drives the measuring rod to move, and the length scales on the measuring rod are checked, so that the specified length position of the pipe fitting can be conveniently bent, and a plurality of bent pipe fittings can be conveniently kept consistent.

The utility model relates to a conveying catheter and a conveying system. The conveying catheter comprises a deformation pipe, a first connecting pipe and a second connecting pipe, the shape memory component is arranged in the deformation tube and extends to the far end of the deformation tube, and the shape memory component can be bent and deformed; and the induction part is arranged in the shape memory part, and the induction part can activate the shape memory function of the shape memory part under the control of an induction device of the conveying system, so that the shape memory part drives the deformation pipe to bend. In this way, the induction part can control the shape memory part to have the shape memory function after being activated under control. When the far end of the catheter to be conveyed reaches the bifurcated blood vessel or the angulated blood vessel, the sensing part is controlled by the sensing device in vitro to activate the shape memory function of the shape memory part, so that the far end of the conveying catheter can be bent, the conveying catheter can conveniently pass through the angulated blood vessel or the bifurcated blood vessel, the supporting performance on a guide wire is further enhanced, and surgical operation is facilitated; the operation success rate is improved.

The utility model provides a stator assembly and a motor, and relates to the technical field of high-voltage motors. The stator assembly comprises a stator core and a winding wire; the stator core is provided with a plurality of stator slots, the stator slots are arranged on the outer side wall and the inner side wall of the stator core in pairs and are distributed along the circumferential direction of the stator core, a plurality of turns of winding wires are arranged in each stator slot in a penetrating manner, and each turn of winding wire is coated with a turn-to-turn insulating layer. In the stator assembly, a plurality of turns of winding wires are arranged in each stator slot in a penetrating manner to form a back winding type scattered wire winding. And meanwhile, each turn of winding wire is coated with the turn-to-turn insulating layer, so that high voltage can be withstood, and the insulation requirement of the high-voltage motor can be met. In the winding process, the winding wire has better flexibility and is easier to bend, so that the sizes of the windings at the two ends of the stator iron core are smaller than those of the formed windings, the occupied space is reduced, the length of the high-voltage motor can be shortened, and the high-voltage motor can achieve higher power and rotating speed.

The invention discloses a preparation method and application of bionic intelligent hydrophilic and hydrophobic fresh water collection fibers, and belongs to the technical field of chemical bionics. The preparation device comprises a fibril fixing frame, a symmetrical hole channel square liquid tank, a camera obscura ultraviolet analyzer and a fiber receiver. The method comprises the following steps: firstly, fixing fibrils on a fibril fixing frame, enabling a prepared polymer mixed solution with the mass fraction of 9%-15% and the fibrils to pass through a symmetrical pore channel square liquid tank, pouring the polymer solution into the square liquid tank, pulling the fibrils at a constant speed to sequentially pass through the square liquid tank, and curing generated bead string fibers through an ultraviolet curing box, finally, fixing the bead string fiber on a fiber receiver, and freeze-drying the received bead string fiber to obtain the bionic intelligent fresh water collection fiber with the micro-nano pore channel structure. The preparation device is simple, the preparation method is simple, and the cost is extremely low; the surface of the fresh water collecting fiber is provided with a nano-scale interpenetrating network pore channel structure, so that the fresh water collecting fiber is easy to weave and has excellent stability, and rapid capture and collection of liquid drops are realized.

The invention discloses an auxiliary device for an arthroscopic surgery in the orthopedics department, and relates to the technical field of medical instruments. The device comprises a bottom plate, a supporting structure is fixedly connected to the middle of the upper end face of the bottom plate, a back supporting structure is rotatably connected to the left end face of the supporting structure, a driving structure is fixedly connected to the lower end face of the supporting structure, and a limiting structure is arranged at the lower end of the driving structure and fixedly connected to the left side of the upper end face of the bottom plate. In use, a driving structure is mounted and placed through a placement plate, then limiting is conducted through a sliding rod, so that the driving structure moves left and right, the driving structure can push a back supporting structure, and through a driving structure on the upper end face of a limiting structure, a telescopic structure is driven in use; and forward and reverse rotation of the worm gear is adjusted through the driving motor, so that the effect of facilitating lying of the personnel in use is achieved, the comfort of the personnel in an operation is improved, and the effect of facilitating the personnel to improve the work efficiency in use is achieved.

The embodiment of the invention provides an iron tower pipe fitting automatic bending device, and relates to the technical field of iron tower pipe fitting bending machining, the iron tower pipe fitting automatic bending device comprises a bending table, a longitudinal displacement mechanism is fixedly installed in the middle of the bending table, and transverse displacement mechanisms are fixedly installed on the two sides of the bending table; the adjustable bending guide wheel is more convenient to use through an adjusting assembly, a transmission assembly and a limiting assembly, an operation handrail is held by hand and squeezed, the limiting arm is driven to move outwards to pull a limiting spring and enable a limiting pin rod to be separated from a limiting hole, and the operation handrail is twisted to drive a connecting rod to rotate to drive a second lead screw; and after adjustment is completed, the operation handrail is loosened, the limiting spring resets and fixes the connecting rod and the lead screw, the limiting guide ring is made to be stable, the distance adjustable design is matched with the iron tower pipe fittings of different thicknesses to the maximum extent, the overall production and machining adaptation performance of the device is improved, and the production efficiency is improved. And higher flexibility and stability are brought to iron tower pipe fitting machining.

The utility model discloses a bending device for aluminum alloy plate production, which belongs to the technical field of aluminum alloy plate production and comprises a support frame, a cross frame is fixedly mounted above the support frame, and a bending mechanism capable of adjusting bending positions as required is arranged above the support frame. Two bends can be machined at a time through the bending mechanism, machining efficiency is high, an aluminum alloy plate is limited through the two positioning plates, the bending position can be automatically adjusted through cooperation of the lead screw sliding rail A and the lead screw sliding rail B, use is more convenient, the aluminum alloy plate is clamped by the conveying roller A and the conveying roller B together to move slowly, and the machining efficiency is high. And the balls roll at the same time, so that the friction force between the aluminum alloy plate and the positioning plate is reduced, the aluminum alloy plate continuously moves, the purpose of automatically discharging the bent aluminum alloy plate is achieved, and the labor intensity of workers is reduced.

The utility model discloses a pipe bending machine with a cutting function, and relates to the technical field of pipe bending machines. The cutting unit is arranged on the upper surface of the workbench and used for cutting; the cutting unit is arranged on the upper surface of the workbench, the pipe bending unit is arranged on the upper surface of the workbench and used for bending pipes, the cutting unit comprises a supporting assembly arranged on the upper surface of the workbench and a cutting assembly arranged on the upper surface of the workbench, and the pipe bending unit comprises a bending assembly arranged on the upper surface of the workbench and an adjusting assembly arranged on the upper surface of the workbench. According to the pipe bending device, the supporting frame, the rolling rollers, the limiting elastic pieces, the supporting plate, the first hydraulic cylinder, the telescopic limiting rod, the lifting block, the cutting machine, the fixing plate, the pneumatic air cylinder and the clamping block are matched with one another, so that a pipe body needing to be bent can be conveniently cut; and a first transmission wheel, a second transmission wheel, a driving box, a driving roller, a limiting groove body, a second hydraulic cylinder and a limiting sliding rod are matched with one another, so that the pipe body can be conveniently bent.

The utility model belongs to the technical field of teaching aids, and particularly relates to a puncture instrument for venous transfusion nursing teaching, which comprises a hollow flexible outer tube with two open ends and a hollow simulation blood vessel with two open ends, an inner column is movably inserted into the flexible outer tube, and adjusting rods penetrate through two ends of the inner column. The adjusting rod is movably connected with the inner column, a plurality of first fixing pieces are arranged on the adjusting rod, a plurality of concave grooves used for the first fixing pieces to move are formed in the outer wall of the inner column, one end of each first fixing piece extends to the outside of the corresponding concave groove, and the other end of each first fixing piece extends to the outside of the corresponding concave groove. By fixing the simulated blood vessel on the first fixing piece and the second fixing piece, when the curve and straight direction of the simulated blood vessel needs to be adjusted along with the depth of teaching, the adjusting rod is rotated to drive the first fixing piece to move, so that the simulated blood vessel is in a bent state, the difficulty of venous transfusion paracentesis is increased, and the teaching efficiency is improved. And the level of intravenous infusion paracentesis of students is improved.

The invention discloses an all-plastic combined atomizing pump which comprises a bottle locking cap capable of being fixed to a liquid containing bottle, a pump body is installed on the bottle locking cap, the lower end of the pump body is connected with a suction pipe through a communication opening, and a liquid storage cavity communicated with the suction pipe and capable of allowing liquid to flow in and a pumping assembly capable of sliding up and down relative to the pump body are arranged in the pump body. A plastic one-way valve capable of controlling the communicating opening to be opened to enable liquid to flow into the liquid storage cavity from the bottle body is arranged in the liquid storage cavity, a pressing head capable of driving the pumping assembly to move downwards to enable air pressure to be generated in the liquid storage cavity to extrude the liquid in the liquid storage cavity to flow out is arranged at the upper end of the pumping assembly, and a spray nozzle for spraying the liquid is arranged on the pressing head. A plastic elastic piece which can elastically press the pressing head to drive the pumping assembly to move upwards to generate negative pressure in the liquid storage cavity to open the plastic one-way valve to suck liquid into the liquid storage cavity is arranged between the bottle locking cap and the pressing head, the upper end of the plastic elastic piece abuts against the lower end of the pressing head, and the lower end of the plastic elastic piece abuts against the bottle locking cap; and the plastic elastic piece is provided with an elastic wall which is extruded to deform when being pressed down.

The invention discloses a preparation method and application of a high-speed perovskite photoelectric detector, and relates to the technical field of detector devices, in particular to the preparation method and application of the high-speed perovskite photoelectric detector. The problems that an existing perovskite-based photoelectric detector is large in dark current, mismatched in energy level, high in series resistance and not beneficial to interface carrier extraction are solved. The method comprises the following steps: providing a substrate and pre-treating the substrate to obtain a pre-treated substrate; spin-coating a NiOx solution on the pretreated substrate, and annealing to obtain a pretreated film layer; the surface of the pretreated film layer is rotationally coated with a 2Br-POOH solution, annealing is conducted, and a first treated piece is obtained; dropping the perovskite precursor solution onto the first processing piece, and performing spin coating and annealing to obtain a perovskite thin film; and thermally evaporating the electrode on the substrate to obtain the photoelectric detector. According to the method, longitudinal growth of perovskite crystals is promoted, collection and transmission of carriers are facilitated, and the device is high in stability and response.

The utility model relates to the technical field of solar cells, in particular to a passivation contact structure, a solar cell and a photovoltaic module. The passivation contact structure comprises a dielectric layer which is a silicon oxynitride layer, and the thickness of the dielectric layer is 1.2 nm to 3 nm; the doping layer is arranged on the dielectric layer, and the thickness of the doping layer ranges from 30 nm to 80 nm; wherein the doped layer comprises a first doped polycrystalline silicon layer, a silicon oxide layer and a second doped polycrystalline silicon layer, the first doped polycrystalline silicon layer, the silicon oxide layer and the second doped polycrystalline silicon layer are sequentially arranged in the direction away from the dielectric layer, the first doped polycrystalline silicon layer and the second doped polycrystalline silicon layer are doped polycrystalline silicon layers doped with doping elements, and the thickness of the silicon oxide layer ranges from 1.5 nm to 3 nm. The passivation contact structure can improve the short-circuit current, optimize the passivation performance and improve the photoelectric conversion efficiency of the solar cell.

The invention relates to an anti-counterfeit label, in particular to an uncovering type anti-transfer anti-counterfeit label and a preparation method thereof. The invention relates to an uncovering type anti-transfer anti-counterfeit label. Comprising a first thermal shrinkage film layer, a first pressure-sensitive adhesive layer, a first printing layer, a second thermal shrinkage film layer, a second pressure-sensitive adhesive layer, an aluminum washing film layer, a third glue layer, a laser hiding layer, a local release coating, a second printing layer, a fourth glue layer, a transfer holographic rainbow aluminum plating layer, a fifth glue layer, a base material layer, a third pressure-sensitive adhesive layer and a release paper layer which are sequentially arranged from top to bottom. The uncovering type anti-transfer anti-counterfeit label is high in anti-transfer performance, easy to open during use, high in anti-counterfeit grade, easy to identify and not prone to upwarp when being pasted; the preparation method of the label is scientific, reasonable, simple and easy to implement.

The utility model discloses a PE pipe fitting quick connecting device which comprises an auxiliary pipe, conical connectors are arranged at the two ends of the auxiliary pipe, a fixing plate is arranged on the peripheral surface of the auxiliary pipe in a matched mode, holes are symmetrically formed in the two sides of the fixing plate, connecting rods are arranged in the holes in a matched mode, a limiting ring is welded to one end of each connecting rod, and a threaded rod is welded to the other end of each connecting rod. The threaded rod is in threaded connection with a nut, the threaded rod movably penetrates through a limiting block, a clamping plate is welded to one side of the limiting block, fixing blocks are symmetrically connected to the outer sides of the two ends of the clamping plate, holes are formed in the two fixing blocks, the two clamping plates are connected to the outer side of the main pipe in a sleeving mode, the fixing blocks are fixed through bolts, and therefore the clamping plates are fixed to the main pipe; then the two ends of the main pipe are sleeved with the conical connectors at the two ends of the auxiliary pipe, then the connecting rod and the threaded rod penetrate through the holes in the limiting blocks and the fixing plates, the conical connectors are driven to abut against the main pipe by rotating the nuts, and therefore the effect of directly connecting the pipes is achieved.

The utility model discloses a steel structure bending device convenient to adjust the angle, and relates to the technical field of steel structure bending, the technical scheme is that the steel structure bending device convenient to adjust the angle comprises a workbench, and a bending assembly is arranged on the surface of the workbench. The number of rotation turns of the lead screw is accurately controlled, the translation distance of the moving plates is controlled, the two moving plates drive the first block and the second block fixed to the moving rods to horizontally move towards the two sides of the lead screw at the same time, the first rod and the second rod move, the rotation angle of the disc can be accurately and conveniently controlled, and the steel structure bending angle of the bending assembly is convenient to adjust. The technical effect that the device can accurately and conveniently adjust the bending angle of the steel structure is achieved, and therefore the problems that in the prior art, in order to accurately control the bending angle, a bending structure in an adjusting device needs to be manually corrected point by point, operation convenience is low, and efficiency is low are solved.