1312 results about "Tinning" patented technology

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The invention relates to the technical field of silica gel cables, and discloses a silica gel cable with high reliability and high flexibility and a process thereof, and the silica gel cable comprises a conductor layer which is formed by hierarchically twisting a plurality of tinned copper wires with the diameter of 0.05-0.10 mm, and the twisting helical angle gradually changes from 25 degrees in the inner layer to 55 degrees in the outer layer; the insulating layer coats the conductor layer and comprises a silica gel material, a hydrogen-containing silicone oil cross-linking agent and a plasticizer, microcapsules with the particle size of 20-50 microns are dispersed in the silica gel material, a shell layer of each microcapsule is polyurethane, and a core layer of each microcapsule is a siloxane repairing agent containing a platinum catalyst; and a sheath layer. A hydrogen-containing silicone oil cross-linking agent in the insulating layer enables molecular chains to be cross-linked to form a net structure, the physical and chemical stability is enhanced, microcapsules are matched to endow a self-repairing function, a repairing agent is released when the cable is damaged, the self-repairing performance of the insulating layer is further guaranteed, damage is filled through a cross-linking reaction, insulation is recovered, the reliability of the cable is remarkably improved, and the service life of the cable is remarkably prolonged.

The invention discloses a multi-layer protection cable resistant to an extreme environment, and belongs to the technical field of cables. The cable is of a seven-layer composite structure design and sequentially comprises a conductor, an insulating layer, a shielding layer, a buffer layer, a waterproof layer, a heat insulation layer and a protective outer layer from inside to outside, and the conductor is made of high-purity oxygen-free copper; the insulating layer is made of a polyimide material and has high temperature resistance, low temperature resistance and excellent insulating property; the shielding layer is composed of a tinned copper wire woven mesh and a high-permeability permalloy foil, and electromagnetic interference is effectively shielded; the buffer layer is made of an elastic rubber material to relieve mechanical stress; the waterproof layer adopts a nanoscale fluorosilicone resin coating and has excellent waterproof performance; the heat insulation layer is made of ceramic fibers and aerogel, and efficient heat insulation is provided; and the protective outer layer is made of a high-strength and corrosion-resistant polyether-ether-ketone (PEEK) material. The cable has excellent high temperature resistance, low temperature resistance, corrosion resistance and electromagnetic interference resistance, is suitable for extreme environments, and ensures stable transmission of electric power and signals under extreme conditions.

The invention discloses a circuit board tin pick-up device and a tin pick-up method, and belongs to the technical field of circuit board processing. A circuit board to be subjected to tin pick-up is inserted into a loading frame body, and the loading frame body drives the circuit board to rotate by 60 degrees, so that the circuit board directly faces the upper part of a tin liquid box; a circuit board in a loading frame is pushed by a pushing assembly to make contact with tin liquid in a tin liquid box to complete tin dipping work, then a connecting block drives a shifting rod to slide into a sliding hole outside a driving disc again and drives the driving disc and a supporting shaft to rotate, in the same way, a supporting plate drives a downward pressing assembly and the loading frame to rotate, and tin dipping work is completed. The circuit board to be tinned is located above the tin liquid box, so that the circuit board in the loading frame body is intermittently and automatically fed, the tinning work of the circuit board can be continuously carried out, and the traditional mode that the circuit board is loaded on a single clamp and then the tinning work is carried out in a frequent disassembly and assembly mode is abandoned; therefore, the efficiency of tinning work of batch circuit boards is improved, and the continuity of the tinning work of the circuit boards is ensured.

The utility model belongs to the technical field of copper wire processing, and particularly relates to a linear guide rail take-up structure of an annealing and tinning machine, which comprises a workbench, the workbench is fixedly connected with an annealing and tinning machine main body, a fixed seat is fixedly arranged on the workbench, a take-up shaft is rotatably connected onto the fixed seat, and the take-up shaft is fixedly connected onto the workbench. A fixed seat is arranged on the workbench, a take-up shaft is arranged on the fixed seat, a driving mechanism for driving the take-up shaft to rotate is arranged on the fixed seat, a take-up barrel is arranged on the take-up shaft, a horizontal linear guide rail mechanism is arranged on the front side of the workbench, and in the process that the take-up barrel rotates to take up a copper wire, the copper wire is guided through left-right movement of a guide limiting mechanism; and the overall diameter of the take-up barrel after the copper wire is wound is detected through the distance sensor, the rotating speed of the take-up barrel is conveniently controlled, the take-up speed is kept within a stable interval or constant, and the situation that the diameter of the copper wire is increased after the copper wire is wound, consequently, the linear speed is increased, and the amplitude change of the pulling force borne by the copper wire is large is avoided.

The invention discloses a novel tin-plated copper-clad aluminum alloy wire coating process and a preparation method, and the novel tin-plated copper-clad aluminum alloy wire coating process comprises the following steps: rolling an aluminum alloy material into an aluminum alloy rod through a continuous casting and rolling process in a smelting process; removing an oxide layer on the surface of the aluminum alloy rod; the surface of the aluminum alloy rod with the surface oxide layer removed is coated with a copper strip; drawing and exhausting after coating the copper strip to form a copper-coated aluminum alloy wire blank; the copper-clad aluminum alloy wire blank is subjected to drawing, medium wire drawing, fine wire drawing and annealing treatment to form a copper-clad aluminum alloy wire; and the copper-clad aluminum alloy wire enters a tinning machine and is coated with a tinning layer on the surface to form the tinned copper-clad aluminum alloy wire. The core wire of the tin-plated copper-clad aluminum alloy wire is the copper-clad aluminum alloy wire, the outer layer of the copper-clad aluminum alloy wire is copper, the interior of the copper-clad aluminum alloy wire is made of a high-strength and high-conductivity aluminum alloy material, and the mechanical property and the electrical property of the tin-plated copper-clad aluminum alloy wire are superior to those of a copper-clad aluminum wire, a copper-clad aluminum alloy wire and an aluminum-magnesium wire which are used at present.

The invention relates to a composite cable, and relates to the technical field of cables, the composite cable comprises a conductor layer, a composite insulating layer, a waterproof layer, a weather-proof sheath layer and an armor layer from inside to outside in sequence, the conductor layer comprises at least six tinned copper conductors, the tinned copper conductors are symmetrically arranged in a regular hexagon shape, dielectric elastomers are filled among the conductors, and the dielectric elastomers are arranged between the tinned copper conductors. The composite insulating layer comprises an inner shielding layer, a main insulating layer and an outer shielding layer from inside to outside, the waterproof layer is a fluororubber extruded layer, the weather-proof sheath layer comprises a bonding transition layer and a weather-proof functional layer, and the armor layer is of a stainless steel band spiral wrapping structure. The composite cable can meet the requirement for high performance in a harsh environment and can show excellent performance under the extreme conditions of low voltage, large day and night temperature difference, strong ultraviolet rays, sand and dust abrasion, acid rain corrosion and the like.

The utility model relates to the technical field of signal transmission cables, and discloses a novel insulation co-extrusion double-coaxial high-speed data transmission cable, which comprises conductors, an insulation layer, a shielding layer and a sheath layer, and is characterized in that the two conductors are parallel to each other and are arranged at an interval; the insulating layer is uniformly and tightly wrapped on the outer sides of the two conductors, is a polytetrafluoroethylene insulating layer, and is simultaneously extruded at one time, so that the insulating layer is pushed and wrapped on the outer sides of the two conductors; the shielding layer comprises a first shielding layer and a second shielding layer, the first shielding layer wraps the outer ring of the insulating layer, and the second shielding layer wraps the outer ring of the first shielding layer; the sheath layer wraps the outer ring of the second shielding layer and is used for fixing and shielding protection. The two conductors are stranded bare copper, tinned copper wires or silver-plated copper wires. The cable has more reliable mechanical and physical stability, is more beneficial to coupling of an electromagnetic field, can reduce capacitance impedance, has lower time delay difference, and improves signal transmission speed and quality.

The invention discloses an anti-deviation circuit board chip welding device and method, and relates to the field of chip welding, the anti-deviation circuit board chip welding device comprises a welding workbench, a welding robot is installed on the welding workbench, a welding positioning groove is formed in the welding workbench, a hot melting mechanism is arranged on the welding workbench, and the hot melting mechanism comprises a horizontal sliding seat, a vertical plate and a hot melting plate; the horizontal sliding seat is arranged on the welding workbench in a sliding mode, the sliding direction of the horizontal sliding seat is parallel to the welding positioning groove, the vertical plate is fixed to the horizontal sliding seat, the hot melting plate is arranged on the vertical plate in a sliding mode, a rectangular groove is formed in the middle of the hot melting plate in a penetrating mode, and a plurality of hot fuses are arranged on the two opposite inner walls of the rectangular groove at equal intervals in the horizontal direction; in the welding process, tin is plated on the chip welding holes of the circuit board through the welding robot, the thermal fuse is located between every two adjacent welding holes and used for enabling tin to be in a hot melting state, it is guaranteed that the chip cannot move in the welding process, the welding reject ratio is greatly reduced, and the welding quality is improved.

The invention relates to the technical field of power transmission and cable monitoring cables, in particular to an anti-interference optical fiber monitoring cross-linked cable and a forming and manufacturing method, and the cable sequentially comprises a cable core layer, a monitoring function layer, an electromagnetic shielding layer, an insulation protection layer and an outer protection layer from inside to outside; the monitoring function layer is tightly wound on the outer surface of the cable core layer in a spiral shape, the electromagnetic shielding layer is located between the monitoring function layer and the insulation protection layer, the electromagnetic shielding layer is of a multi-layer structure, the inner layer of the electromagnetic shielding layer is a permalloy belt, and the outer layer of the electromagnetic shielding layer is a tinned copper woven mesh. And a plurality of rat-proof and ant-proof composite layers are arranged on the outer side wall of the outer protective layer at intervals along the length direction of the outer protective layer. The monitoring function layer is spirally and tightly wound on the outer surface of the cable core layer, the design enables the optical fiber and the cable core layer to be tightly attached, it is ensured that the temperature change and mechanical deformation of the cable core layer can be rapidly transmitted to the optical fiber, and the problem of monitoring lag caused by gaps in a traditional loose tube structure is solved.

The utility model relates to an automatic tinning device for a motor stator, and belongs to the technical field of motor manufacturing equipment. Comprising a working table, a water storage disc, a lifting rotating mechanism and a tin furnace assembly, a bracket is arranged on the working table through the lifting rotating mechanism, the water storage disc is arranged on the working table on one side of the bracket, the tin furnace assembly is arranged on the working table on the other side of the bracket, the tin furnace assembly comprises a tin furnace body and a tin scraping piece, and the tin furnace body is clamped on the working table through a limiting block; and a tin scraping piece is arranged on the working table on one side of the tin furnace body. According to the automatic tin coating device for the motor stator, the manual labor amount is effectively reduced, the tin coating working efficiency is improved, meanwhile, it is guaranteed that the tin coating quality consistency is good, and the problems of uneven tin coating and insufficient soldering are avoided.

The invention belongs to the technical field of cables, and particularly relates to a bending-resistant tow chain cable for a robot, which comprises a conductor core layer, an insulating layer, an inner sheath layer, a braid layer, a non-woven fabric layer and an outer sheath layer, the insulating layer wraps the conductor core layer, the inner sheath layer is positioned outside the insulating layer, the braid layer covers the inner sheath layer, the non-woven fabric layer is positioned outside the inner sheath layer, and the non-woven fabric layer is positioned outside the outer sheath layer. The non-woven fabric layer is wound on the braid layer, the outer sheath layer wraps the non-woven fabric layer, the conductor core layer is formed by twisting a plurality of flexible tinned copper wires and aramid fibers, and the surfaces of the flexible tinned copper wires are coated with carbon nanotube coatings; according to the invention, the thickness of the carbon nanotube coating is controlled to be 3-5 [mu] m, and the carbon nanotube coating is prepared by adopting a coating process, has excellent conductivity and mechanical strength, can effectively reduce the contact resistance change of the flexible tinned copper wire in the repeated winding process, and enhances the wear resistance and corrosion resistance of the surface of the copper wire, thereby prolonging the service life of the conductor core layer.

The utility model provides a DC-link film capacitor with high temperature resistance and high ripple current in the new energy field and a method, the DC-link film capacitor comprises a flame-retardant plastic shell, an insulating epoxy resin adhesive layer, a capacitor roll core and a metal connecting layer arranged at the corresponding position of the winding side wall surface of the capacitor roll core, and two tinned outgoing lines are connected to the corresponding positions of the two side wall surfaces of the metal connecting layer. By effectively improving the heat conductivity coefficient and the heat dissipation capability of the capacitor, heat in the inner core of the capacitor can be quickly and effectively dissipated, heat balance in a capacitor product is achieved, the capacitor has high temperature resistance, the charging time can be greatly shortened, and the service life of the capacitor is prolonged. The high-temperature-resistant high-ripple-current capacity requirement of capacitors in the new energy field such as the new energy field is met, the preparation process is simple, and the cost is low.

The utility model discloses a wire arranging device for full-automatic continuous welding, which belongs to the technical field of automation and comprises a bottom plate, a wire harness feeding transmission device for feeding wire harnesses is mounted on the upper end face of the bottom plate, and a continuous wire arranging component for arranging the wire harnesses is mounted on the upper end face of the bottom plate; the wire harness transferring and pushing assembly is used for transferring wire harnesses on the wire harness feeding transmission device to the continuous wire arranging assembly, and the wire harness transferring and pushing assembly is further used for pushing the wire harnesses arranged on the continuous wire arranging assembly to the tinning station and the welding station; the continuous wire arranging assembly comprises a plurality of wire arranging assemblies and a second conveying belt assembly, the wire arranging assemblies are installed on the outer wall of a conveying belt of the second conveying belt assembly at equal intervals, a main body support of the second conveying belt assembly is fixedly connected with the upper end face of the bottom plate, and a motor is fixedly installed on the main body support of the second conveying belt assembly; by means of the mode, continuous feeding and discharging of the wire harnesses are achieved.

The invention discloses a high-performance anti-interference low-voltage cable, which relates to the technical field of power transmission equipment, and is technically characterized by comprising a conductor core, an insulating layer, a shielding layer, a buffer layer and an outer sheath which are sequentially and coaxially arranged from inside to outside, the conductor core is made of a plurality of strands of tinned copper wires through a double stranding process of bunch stranding and compound stranding; the insulating layer coats the outer side of the conductor core; the shielding layer is of a double-layer structure and comprises an inner-layer aluminum-plastic composite belt and an outer-layer tinned copper wire braid layer, and an aluminum layer of the aluminum-plastic composite belt faces the inner side and is in equipotential connection with the conductor core. A layer of conductive carbon fiber cloth is wrapped on the outer side of the braid layer; the buffer layer is filled between the shielding layer and the outer sheath, and a plurality of aramid fiber reinforcing ribs are uniformly embedded in the buffer layer along the axial direction of the cable; the thickness of the outer sheath is made of a weather-resistant polyvinyl chloride material added with an ultraviolet light absorber and an anti-aging agent, and the inner surface of the outer sheath is provided with an anti-skid groove. And a nano montmorillonite filler is uniformly dispersed in the outer sheath.

The invention discloses a preparation method of a tinned copper core fluorinated ethylene propylene insulated cable for aerospace, and relates to the technical field of aerospace cable preparation methods. The preparation method comprises the following steps: S1, preparing a nickel-plated copper core; s2, preparing a heat insulation layer; s3, a composite insulating layer is prepared, the composite insulating layer is composed of a first insulating layer, a second insulating layer and a third insulating layer from inside to outside, the first insulating layer is a fluorinated ethylene propylene layer, the second insulating layer is a polyimide / fluorinated ethylene propylene composite layer, and the third insulating layer is a polyether-ether-ketone layer; s4, preparing a shielding layer; and S5, preparing a protective layer. The invention provides the preparation method of the tinned copper core fluorinated ethylene propylene insulated cable for aerospace, the insulated cable prepared by the preparation method has high performance and high reliability in an extreme aerospace environment, and all key requirements of electrical performance, radiation resistance, mechanical strength and wear resistance are comprehensively met.

The invention relates to the technical field of cables, and provides a low-voltage power cable which sequentially comprises a conductor, an insulating layer, a lining layer, an armor layer and a sheath layer from inside to outside. The armor layer is formed by winding two layers of parallel steel belts outside the cable lining layer in a spiral or longitudinal wrapping manner; the conductor is formed by twisting tinned copper wires; the sheath layer is a polyvinyl chloride resin sheath layer.

The utility model relates to the technical field of series printing, and discloses a solder paste series printing device which comprises a first printing machine, a first solder paste brushing table is arranged in the first printing machine, a second printing machine is arranged on the right side of the first printing machine, and a second solder paste brushing table is arranged in the second printing machine. And tinning mechanisms are arranged in the first solder paste brushing table and the second solder paste brushing table. According to the tin paste series printing device, through the arranged tinning mechanism, after a first printing machine completes tinning treatment on an A-face jointed board, a second printing machine completes tinning treatment on a B-face jointed board through a three-dimensional steel mesh, a shielding cover and a stepped scraper; the second printing machine does not affect solder paste on the top of the A-side jointed board when tinning treatment is conducted on the B-side jointed board, the first printing machine and the second printing machine are used in series, the solder paste printing quality can be guaranteed, and the production efficiency is improved.

The invention relates to the technical field of cables, and discloses a long-life photovoltaic cable which comprises a conductor, an insulating layer arranged outside the conductor and a sheath layer arranged outside the insulating layer, the conductor is formed by stranded tinned copper wires, the surface of each copper wire is covered with a layer of tin, and the sheath layer is arranged outside the insulating layer. Both the insulating layer and the sheath layer adopt a flame-retardant halogen-free polyolefin material with at least temperature resistance as a base material, the content of carbon black in the sheath layer is greater than%, and the materials of the insulating layer and the sheath layer are subjected to an irradiation crosslinking processing procedure. The invention aims to provide the long-life photovoltaic cable which is temperature-resistant, aging-resistant, acid and alkali-resistant, flame-retardant and excellent in ultraviolet-proof performance.

The invention relates to the technical field of cables, and provides a flexible cable for a robot, which comprises a cable core and a sheath layer wrapping the cable core, the cable core comprises signal lines and power lines. Each signal line sequentially comprises a conductor, a belting layer and a shielding layer from inside to outside; the shielding layer sequentially comprises a first shielding layer and a second shielding layer from inside to outside; the first shielding layer is a bare copper wire mesh layer; the second shielding layer is a tinned copper wire mesh layer; the belting layer is a glass fiber tape layer; the sheath layer comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride resin, 20-30 parts of a plasticizer, 2-4 parts of an anti-aging agent, 2-4 parts of a calcium-zinc stabilizer, 1-4 parts of a lubricant and 6-16 parts of a flame retardant; the plasticizer is prepared from dioctyl phthalate, polyethylene glycol adipate and p-methoxyacetophenone. According to the technical scheme, the problem of low elongation at break of the flexible cable for the robot in the prior art is solved.

The invention discloses a cable resistant to high temperature and acid corrosion, and the cable comprises a conductor layer which is formed by concentrically twisting a plurality of nickel-coated copper wires; the inner insulating layer coats the conductor layer and is used for improving the thermal conductivity of the cable; the outer insulating layer is sleeved on the inner insulating layer; the anti-bending buffer layer is coated outside the outer insulating layer; the electromagnetic shielding layer wraps the anti-bending buffer layer and is used for forming a shielding layer; the electromagnetic shielding layer is coated with the anti-corrosion functional layer, the anti-corrosion functional layer is a fluororubber belt, and benzotriazole corrosion inhibition microcapsules are embedded in a rubber layer of the fluororubber belt; and the mechanical strengthening layer is arranged outside the anti-corrosion functional layer in a sleeving manner. According to the invention, the conductor layer adopts the nickel-coated copper wire to improve the high-temperature-resistant conductivity, the corrosion inhibition microcapsules are embedded in the corrosion-resistant functional layer to realize long-acting corrosion resistance, the electromagnetic shielding layer is combined with graphene and the tinned copper strip to enhance the broadband shielding effectiveness, and the cable has long-acting corrosion resistance, mechanical property stability in a high-temperature environment and broadband electromagnetic shielding effectiveness.

The utility model discloses a double-layer insulating high-safety environment-friendly power cable, which relates to the technical field of environment-friendly power cables and comprises tinned copper wire conductors, a filling layer and an insulating layer body, the insulating layer body is arranged outside the tinned copper wire conductors, and the filling layer is filled in the insulating layer body. According to the double-layer insulation high-safety environment-friendly power cable, the insulation sleeve can separate the inner core and effectively support the inner core, good supporting and anti-pulling effects are achieved while insulation is achieved, a reserved groove is formed in the outer side of the insulation sleeve, space is provided for deformation of the insulation sleeve when the insulation sleeve is inserted, and the protection layer and the insulation sleeve are used in cooperation, so that the protection effect is good. According to the double-layer insulation high-safety environment-friendly power cable, the durability and the anti-deformation effect of the power cable are enhanced, so that the problems that the anti-extrusion effect is poor and the good insulation effect cannot be achieved due to the fact that the insulating layer on the outer side of the cable mostly adopts a direct sleeving mode to protect the internal wires are solved.

The invention discloses a high-voltage cable buffer water-blocking tape for preventing electric ablation, and relates to the field of high-voltage cable structures. The water-blocking fabric comprises a first fluffy cotton layer, a first filter cotton layer, a non-woven fabric layer, a water-blocking powder layer, a second non-woven fabric layer, a second filter cotton layer and a second fluffy cotton layer which are sequentially arranged from top to bottom, the first fluffy cotton layer and the second fluffy cotton layer are the same in structure, and copper films and tin-plated aluminum films are arranged on the inner sides and the outer sides of the first fluffy cotton layer and the second fluffy cotton layer. According to the invention, better water-blocking performance can be ensured, and electric ablation can be obviously prevented at the same time.

The utility model discloses an automatic bending and tin dipping device based on electromagnetic coil pins, which comprises a loading turntable structure provided with a controllable rotary turntable surface and a plurality of groups of electromagnetic coil stations; the loading and unloading carrying structure is arranged corresponding to the loading turntable structure; the pin bending structure is used for outputting stamping kinetic energy to bend electromagnetic coil pins; the soldering-aid dipping structure comprises a soldering-aid shifting and transposition assembly and a soldering flux lifting assembly, the soldering-aid shifting and transposition assembly is provided with a transposition kinetic energy output end, and the soldering flux lifting assembly is provided with a soldering flux lifting end; the pin tin immersion structure comprises a tin immersion transfer assembly and a tin melting liquid storage assembly. And the impedance detection structure comprises an upper and lower limit alarm resistance meter and a test probe, and can be arranged corresponding to the plurality of groups of electromagnetic coil stations in a switchable manner. The problems that in the prior art, bending and tin immersion processes of electromagnetic coil pins generally depend on manual operation, so that the overall automation degree, the operation efficiency and the qualified rate are low, and the labor cost is high are solved.

The utility model relates to the field of fuse production, in particular to a packaging device for tin-plated alloy fuse production. The technical problems that according to a traditional mode, the two sides of a protective tube are not convenient to package at the same time, the packaging efficiency is low, the protective tube is not convenient to clamp during packaging, and the packaging precision is low are solved. A packaging device for tin-plated alloy fuse production comprises a bottom frame, a containing frame is fixedly connected to the bottom frame, a containing groove is formed in the containing frame, and two bearing frames are fixedly connected to the bottom frame. The lowest fuse is in contact with the heating frames, the two heating frames can heat one ends of the two fuses and the two ends of the protective tube, after heating is conducted for a period of time, the lowest fuse continues to move in the direction close to the protective tube to make contact with the protective tube, and the two sides of the protective tube can be packaged at the same time; and the packaging efficiency is improved.

The invention discloses a welding machine for a tin-plated welding strip of a photovoltaic cell. The welding machine comprises a conveying rack, a welding bracket is fixedly mounted on the left side of the top surface of the conveying rack; the feeding mechanism is arranged at the right end of the conveying rack and comprises feeding supports, the feeding supports are fixedly installed on the front side and the rear side of the right end of the conveying rack, and feeding rotary discs are rotationally arranged in the feeding supports on the front side and the rear side. A dust removal mechanism is arranged on the right side of the top face of the conveying rack and comprises a dust removal support, and the dust removal support is fixedly installed on the right side of the top face of the conveying rack. According to the photovoltaic cell tin-plated solder strip welding machine, the intermittently rotating feeding mechanism drives a cell to be fed and discharged, the dust removal mechanism performs cleaning and dust removal on the cell and an electrode, and meanwhile the normalizing mechanism performing reciprocating motion corrects the cell before welding; and the conditions of pseudo soldering, even welding failure and the like caused by dislocation in the battery moving process are prevented.

The invention discloses a-52 DEG C cold-resistant environment-friendly cable, relates to the technical field of cables, and solves the problem that a cold-resistant environment-friendly cable in the prior art is easy to crack and crack in a low-temperature environment. Comprising a wire core structure, the nylon sheath wire core structure comprises a plurality of conductors distributed in an array, an insulating layer wrapping each conductor and a metal shielding layer wrapping each insulating layer, and each nylon sheath conductor is a tinned copper conductor; the nylon sheath metal shielding layer comprises an inner metal layer and an outer metal layer, the nylon sheath inner metal layer is arranged outside the insulating layer, and the nylon sheath outer metal layer is arranged outside the inner metal layer; the cable also comprises an outer sheath which wraps the cable core structure, and the nylon sheath is made of a thermoplastic elastomer. According to the cable scheme, on one hand, the flexibility, the mechanical strength and the environmental protection performance of the cable can be improved while a low-temperature environment is considered, and on the other hand, the influence of low temperature on data transmission of the cable can be effectively avoided.

The utility model discloses a relay which is provided with pin terminals used for bearing current inflow or outflow respectively, the end portion, used for being connected to the outside, of each pin terminal is provided with at least two connecting portions arranged at intervals in the width direction of the pin terminal, and the sectional area of the end portion of each connecting portion is gradually reduced towards the tail end of the connecting portion to form a tip shape. When the pin terminal is pulled out of a tin furnace, liquid is separated more easily, so that the undesirable phenomenon of the tin tip is reduced, product management and control are facilitated, subsequent processing procedures caused by the undesirable tin tip are avoided, the contact area of the tin liquid and the joint part can be reduced through the tip shape, the tail end of the joint part can enter the tin liquid and pierce the surface of the tin liquid, and the product quality is improved. And copper exposure caused by incomplete tinning is avoided, so that firm welding between the relay and the PCB is ensured when the relay is applied to the PCB.

The utility model discloses a full-shielding grounding type armored field bus cable, which comprises two single-pair shielding twisted wire cores and two external fan-shaped polyethylene resin filling core frames, wherein the two single-pair shielding twisted wire cores and the two external fan-shaped polyethylene resin filling core frames are arranged in a cross shape to form a cable core; each shielding twisted-pair wire core comprises a wire core body which is formed by back-twisting and twisting two insulating wire cores and arranging the two insulating wire cores and two inner-layer fan-shaped polyethylene resin filling core frames in a cross shape, and the wire core body is sequentially wrapped by an aluminum-plastic composite belt longitudinal wrapping waterproof sub-shielding layer, a tinned copper wire inner grounding wire and a semi-conductive nylon water-blocking wrapping layer. The cable core is sequentially coated with an aluminum-plastic composite tape longitudinally-wrapped waterproof total shielding layer, a tinned copper wire outer grounding wire, a copper wire woven total shielding layer, an irradiation crosslinking linear low-density polyethylene inner sheath layer, a galvanized steel wire armor layer and an irradiation crosslinking linear low-density polyethylene outer sheath layer. The cable is balanced and stable in structure, the twisted wire cores are not easy to loosen, the anti-interference capability is enhanced, the cable is suitable for working in a humid environment for a long time, and the durability is better.

The invention belongs to the technical field of tin plating materials, and relates to a tin plating plate with high sulfur resistance and a preparation method and application thereof. The tin-plated plate with high sulfur resistance comprises a first passivation layer, a first tin-plated layer, a first multi-component alloy layer, a tin-plated substrate layer, a second multi-component alloy layer, a second tin-plated layer and a second passivation layer which are arranged in sequence, the surface, away from the first tin plating layer, of the first passivation layer is an inner coating surface; the surface, away from the second tin plating layer, of the second passivation layer is an outer coating surface; the arithmetic mean roughness of the inner coating surface is 0.4-0.5 [mu] m, the profile skewness is 0-0.3, and the profile kurtosis is 2.5-3; the arithmetic mean roughness of the outer coating surface is 0.6-0.7 [mu] m, the profile skewness is 0-0.3, and the profile kurtosis is 2.5-3; the first multi-component alloy layer and the second multi-component alloy layer respectively and independently comprise gallium; according to the tin plate with the high sulfur resistance, the binding force between the film layers is high, and the deformation resistance and the sulfur resistance of the film layers are excellent.