199results about How to "Increase spacing" patented technology

The utility model discloses a permanent and temporary combined assembly type underground structure plate wall connecting node which comprises an assembly type underground diaphragm wall, a full-length steel plate is installed on the side wall of the assembly type underground diaphragm wall, and a prefabricated structure plate is hoisted on the full-length steel plate. The gap between the prefabricated structural slab and the fabricated underground diaphragm wall is filled with ultra-high-performance concrete, and a steel bar structure is arranged in the ultra-high-performance concrete. According to the utility model, the rigid connection between the two prefabricated parts is realized, the integrity of the structure is improved, and the safety and durability of the underground structure are fully ensured; an underground diaphragm wall which is usually used as a temporary structure is changed into a permanent structure, so that the construction period is shortened, and the investment is saved; the ultra-high performance concrete poured in the joint can greatly shorten the anchoring length of the steel bars, enlarge the arrangement distance of the steel bars, obviously reduce the using amount of the steel bars on site and the binding workload, is convenient to install and simple in process, obviously improves the construction efficiency, and has high popularization and application value.

The utility model discloses an efficient refrigeration compressor wire tube condenser, which comprises a condenser body, an air inlet, an air outlet, an air inlet, an air outlet, an air inlet, an air outlet, an air outlet, an air inlet and an air outlet and is characterized in that the condenser body is provided with an inlet end and an outlet end, and a plurality of parallel condensing pipeline parts are arranged between the inlet end and the outlet end; the heat dissipation wires are wound on the condensation pipeline part, and the condensation pipeline part is provided with a plurality of heat dissipation wires which are arranged at equal intervals in the width direction of the condensation pipeline part; the bracket is used for supporting the condenser body; and the intervals of the heat dissipation wires on the condensing pipeline parts which are sequentially arranged from the inlet end to the outlet end are gradually increased. Compared with the prior art, the wire tube condenser solves the problem of low heat dissipation efficiency caused by consistent distribution density of heat dissipation wires on multiple layers of condensation pipelines in an existing wire tube condenser.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The utility model discloses a ceramic tube shell and a packaging structure. The ceramic tube shell comprises a ceramic base body and a working assembly. The ceramic base body comprises a base and an enclosure part, the enclosure part is installed on one side of the base, an installation space is defined by the enclosure part and the base, the installation space is used for containing a chip, and the base is provided with a step located in the installation space; the working assembly comprises a power supply layer, a bonding layer, a signal layer and a back PAD layer, the power supply layer is arranged in the enclosure part, the bonding layer is arranged on the surface of the step, the signal layer is arranged in the base and located on the side, away from the power supply layer, of the bonding layer, and the back PAD layer is located on the side, away from the enclosure part, of the base. According to the scheme, the adverse effect of electromagnetic interference of the power supply layer on signal transmission can be effectively reduced, and the small size of the ceramic tube shell can be conveniently realized.

The utility model discloses a vehicle wire harness placing moving trolley which comprises a moving base and supporting plates installed at the two ends of the outer wall of the top of the moving base, and further comprises a supporting assembly movably inserted into the outer wall of the top of the moving base, and connecting plates are arranged on the outer walls of the opposite sides of the two supporting plates; an expansion assembly is movably inserted into the outer wall of the bottom of the connecting plate. According to the moving trolley for placing the vehicle wire harness, the wire harness can be hung on the first hanging rod and the second hanging rod, the threaded rod can be rotated, the distance between the supporting assembly and the expanding assembly is enlarged through the adjusting assembly, the supporting assembly descends to be pressed on the ground, the trolley is supported, the trolley is more stable when the wire harness is taken, and the wire harness can be conveniently taken. The distance between the two mounting plates can be expanded by rising the expansion assembly, so that the first hanging rods and the second hanging rods are distributed in a long-short staggered mode, every two adjacent wire harnesses are staggered, the hanging number of the wire harnesses is ensured, and the problem that the bottoms of the wire harnesses are wound is solved.

The invention relates to the technical field of sunshade equipment, in particular to a flexible double-property film flexible outer sunshade component which comprises a building outer wall, an electric reel structure and a guide rail module. An on-wall suspended supporting frame is installed on one side of the building outer wall, the other end of the on-wall suspended supporting frame is fixedly connected with a guide rail module, an electric reel structure is installed in the guide rail module, and a flexible film is installed below the electric reel structure. When not in use, the flexible thin film can be wound through the electric reel structure, when in use, the flexible thin film can naturally overhang through the electric reel structure, the electric reel structure can be driven to move in cooperation with the guide rail module, at the moment, the flexible thin film is driven to be subjected to position adjustment, the flexible thin film can swing along with wind, and surrounding air is promoted to flow. The heat dissipation effect is achieved; sunlight is sprayed through the yarn curtain, and the sun-shading effect is achieved.

The application relates to the technical field of display hanging mechanism, in particular to a quick mounting structure of a falling-prevention LCD display module, which comprises a display main body, a back plate is arranged on one side surface of the display main body, a wall hanging part is arranged on the side of the back plate away from the display main body, the back plate is fixed on a wall body through the wall hanging part, a hanging rack for placing the back plate is arranged between the wall hanging part and the back plate, the back plate is hung in a groove on the hanging rack, and a locking mechanism is arranged on the hanging rack and close to the groove of the hanging rack. The locking mechanism is arranged, no additional tool is needed, the mounting process is greatly simplified, the problem that a traditional hanging rack is only fixed by relying on the friction force of a clamping groove and is easy to slip off is solved, unlocking operation is convenient, a pulling rope on the outer side of the hanging rack is pulled and hung on a hook, the locking state can be released, one person can complete the dismounting operation, when the pulling rope is hung on the hook, the unlocking state can be kept, an operator can conveniently align and install, and the tedious operation of repeated unlocking is avoided.

This utility model discloses a freeze dryer that facilitates loading and unloading of materials, belonging to the field of freeze dryer technology. It includes a freeze drying chamber with a loading mechanism at the lower inner side. A freeze drying plate is provided on one side of the loading mechanism, with a through hole at the top. A glass door is provided on one side of the freeze drying chamber, and a placement mechanism is provided at the bottom of the chamber. The loading mechanism allows the bottom plate to slide within two slide rails. By aligning the connecting posts of the two freeze drying plates vertically and inserting the insert block at the bottom of the upper connecting post into the second insert hole of the lower connecting post, the two freeze drying plates can be stacked and connected. The bottom freeze drying plate is then inserted into the first insert hole of the bottom plate in the same way, allowing multiple freeze drying plates to be stacked on the bottom plate. The bottom plate is then inserted into the slide rails and secured with a pin. When items need to be removed from the freeze drying plates, simply pull out the pin and pull out the bottom plate. By connecting multiple freeze drying plates and then pulling out the bottom plate, loading and unloading materials is convenient.

The application relates to a puncture end device and a surgical robot. The puncture end device comprises a base connected with a mechanical arm, a sliding table group comprising a first sliding table and a second sliding table, the first sliding table being slidingly matched with the base along a first direction, and the second sliding table being slidingly matched with the first sliding table along the first direction; a telescopic module connected with the sliding table group, the telescopic module being used for driving the first sliding table to slide relative to the base and driving the second sliding table to slide relative to the first sliding table; and a clamping release module comprising a first clamping mechanism and a second clamping mechanism which are arranged at intervals along the first direction, the first clamping mechanism being connected with the base, the second clamping mechanism being connected with the second sliding table, and the first clamping mechanism and the second clamping mechanism being respectively used for clamping different regions of a puncture needle along the first direction, the first direction being the length direction of the puncture needle. The puncture end device can have a larger puncture stroke, and the probability of collision when the puncture end device exits a CT device scanning cavity is reduced, so that the device is not prone to damage.

This utility model relates to the field of tile auxiliary technology, and in particular to a tile laying and leveling device, comprising an open frame, a base plate rotatably connected to the open end of the open frame, a horizontal plate fixedly connected to the open frame, a round block fixedly connected to the horizontal plate, a threaded hole on the round block, a threaded rod connected to the threaded hole, a handle fixedly connected to the upper end of the threaded rod, and a pressing block rotatably connected to the lower end of the threaded rod. A pressure plate is provided below the open frame, and the horizontal plate and the pressure plate are arranged parallel to each other. This utility model uses the pressure plate to press two tiles together. After the pressure plate cooperates with the base plate, it presses the two tiles together, making the two tiles level. When fixing the tiles, the pressure plate is subjected to vertical pressure, preventing it from pushing the open frame horizontally, thus preventing the gap between the two tiles from increasing and improving the tile installation effect.

The invention provides a silicon-carbon composite material based on graphite tailings and porous silicon as well as a preparation method and application of the silicon-carbon composite material. The preparation method comprises the following steps: carrying out plasma ball milling treatment on a mixed material containing graphite tailings, porous silicon and a carbon coating agent to obtain a composite precursor material; and carrying out heat treatment on the composite precursor material to obtain the silicon-carbon composite material based on the graphite tailings and the porous silicon. According to the invention, non-spherical graphite tailings are used as a main conductive substrate and a buffer skeleton, and based on dense surface defects, developed pores, increased crystal face interlayer spacing and moderate structure disorder, porous silicon is accurately embedded into the interlayer and surface defects of the graphite tailings through plasma ball milling, so that the conductivity of the graphite tailings is improved; according to the preparation method, the mechanical binding force and the volume expansion stress buffering capability of an interface are enhanced, a continuous lithium ion transmission channel is constructed, the intercalation / deintercalation of lithium ions is accelerated, and additional lithium storage active sites can be provided by virtue of the synergistic effect of all component structures.

The invention provides a back door assembly and a vehicle, and relates to the field of vehicle engineering.The back door assembly comprises a back door outer plate and a back door inner plate, and the back door inner plate is connected with the back door outer plate; the back door inner plate is provided with an upper area, a lower area and a boundary beam arranged around the back door inner plate. The section of the upper area protrudes towards the direction close to the back door outer plate; the cross section of the lower area protrudes in the direction away from the back door outer plate, and at least the cross section of the transversely-arranged edge beam is in a step shape. Thus, the section of the upper area protrudes towards the direction close to the back door outer plate, the width of a window frame opening can be shortened on the premise that the view field is guaranteed, and the rigidity of the area is guaranteed; the section of the lower area protrudes in the direction away from the back door outer plate, so that the distance between the back door inner plate and the back door outer plate is increased, and a large storage space is formed in the back door. Meanwhile, the cross section of at least the transversely-arranged edge beam is in a step shape, and the torsional rigidity and the collision impact resistance of the back door assembly are further improved.

The utility model discloses a kind of self-adaptive whetting structure, comprising: rotating seat, it is rotated along the setting of axis A;Sharpening component, it is set on rotating seat, at least has one sharpening surface, cutting into side surface and sharpening surface along the direction of axis A with blade edge, in initial position state, the direction of the path of the inclined sharpening surface to blade edge, with the spacing b between blade edge is formed, and spacing b is along the path direction of blade edge by big to small, or by small to big change setting;Blade edge exerts force to sharpening surface, drive rotating seat to rotate, to make with rotating seat coaxial rotation that sharpening surface accompanies occurs, and then change spacing b, to adaptively fit blade edge;The utility model relates to the technical field of whetting device.

The utility model relates to the technical field of fixing devices, in particular to an adjustable facility agriculture windproof net fixing device which comprises a device body, the device body comprises a mounting frame, and a clamping plate is arranged on one side of the mounting frame; an adjusting mechanism is arranged on the back of the clamping plate and comprises a supporting plate, and a fixing screw is inserted into the supporting plate. After the guide rod is rotationally connected into the threaded hole formed in the supporting frame, the sliding block is pressed to enable the supporting spring to contract, so that one end of the guide rod is inserted into the movable groove formed in the supporting plate, then the sliding block is released, and then the nut is rotationally connected to the outer surface of one end of the fixing screw rod; the supporting plate is clamped and fixed through cooperation of the nuts and the mounting frame, so that the effect of adjusting the distance between the mounting frame and the clamping plate is achieved, and the problem that if the windproof net is too thin, the fixing device cannot stably clamp and fix the windproof net is solved.

The application discloses a method and device for eliminating white smoke in wet desulfurization flue gas, which mixes hot air with reheated flue gas to eliminate white smoke in the flue gas, collects various temperature and humidity data, and finally calculates the critical heating temperature T of the hot air required for eliminating white smoke in the flue gas HCT , and then adjusts the amount of heat medium of the air heater in real time until the temperature T of the hot air is equal to the critical heating temperature T ah of the hot air HCT , and then the flue gas is discharged. The application can heat the flue gas after wet desulfurization by the intermediate wall heating, mix the flue gas with hot air, determine the critical heating temperature of the hot air for eliminating white smoke in the flue gas in real time, adjust the amount of heat medium in real time to control the temperature of the hot air, automatically control the amount of heat medium for mixed heating and eliminating white smoke, and thus eliminate white smoke and avoid unnecessary energy consumption of the device caused by the lack of theoretical basis for adjusting the temperature of the discharged flue gas by the operator.

The utility model discloses a film expanding device, and belongs to the technical field of semiconductors. The film expanding device comprises a workbench and a film expanding assembly, the workbench comprises a first plate, the film expanding assembly comprises a lifting driving module, a lifting frame, a pressing ring and a blocking ring, the blocking ring and the lifting driving module are both arranged on the first plate, and the lifting frame is in transmission connection with the lifting driving module; the projection of the lifting frame in the vertical direction is located on the peripheral side of the projection of the blocking ring, the lifting driving module is used for driving the lifting frame to move in the vertical direction, the pressing ring is fixedly arranged on the lifting frame, and the outer contour projection of the blocking ring in the vertical direction is located in the inner contour projection of the pressing ring. The side, facing the first plate, of the pressing ring is used for installing an adhesive film bonded with a chip. According to the utility model, the stretching efficiency of the adhesive film is improved, the uniform stress of the adhesive film is ensured, and the subsequent chip can be conveniently and quickly taken.

The application relates to a kind of annular bracket stiff concrete beam column node construction device and construction method, including beam column construction mechanism and construction driving mechanism;Beam column construction mechanism includes multiple construction frames, multiple construction frames are arranged side by side between. First gear and second gear are driven to transmit by motor, so that second gear drives rotating rod and connecting column to rotate, connecting column drives another second gear to rotate by sleeve, so that two second gears and two gear ring assemblies are driven, two gear ring assemblies can drive steel beam column to rotate by locking assembly, the surface of steel beam column can be conveniently laid on steel beam column by workman in multiple faces, avoid subsequent still need to carry out steel beam column hoisting to adjust angle and continue construction, lead to the problem of tedious, so as to improve construction efficiency;Extension assembly is connected by slider and sliding sleeve and construction frame, so that construction frame can be unfolded by extension assembly, so as to extend the support length of steel beam column.

The invention relates to the technical field of air conditioning agents, and discloses a novel air conditioning agent and a preparation process thereof, the novel air conditioning agent is prepared from the following raw materials by mass: 10.0-20.0% of light calcium carbonate; 25.0% to 32.5% of D-sodium erythorbate; 5.0%-15.0% of an odor absorbing agent; 0.5%-2.0% of ferrous acetate; 1.0%-3.0% of sodium carbonate; 0.5%-1.5% of citric acid; 15.0% to 20.0% of sodium-based montmorillonite; 5.0% to 10.0% of silicon dioxide; 1.5% to 4.5% of an anti-flocculation synergist; and the balance of water. The device realizes stable air pressure in a reaction period and low-temperature quick effect, effectively absorbs and removes peculiar smell, solves the hardening problem in water-containing material production, and is suitable for industrial continuous production.

This application discloses a hot air drying oven for metal mesh, belonging to the field of hot air drying technology. It mainly includes a box body; the box body includes a hot air box and a conveying assembly; the conveying assembly includes several conveying rollers for conveying the metal mesh. The key feature is that each of the several conveying rollers is equipped with a guide wheel assembly, which includes a first guide wheel and a second guide wheel; both the first and second guide wheels are provided with a bearing portion and a limiting portion, and the diameter of the bearing portion is larger than the diameter of the conveying roller, while the diameter of the bearing portion is smaller than the diameter of the limiting portion; the bearing portions on the first and second guide wheels are close to each other; by providing the guide wheel assembly, the metal frame in the metal mesh can be placed on the guide wheels, thereby increasing the distance between the metal mesh and the conveying rollers, thus reducing the obstruction and interference of the conveying rollers on the hot air flowing down the metal mesh, thereby improving the uniformity of drying on both sides of the metal mesh.

This invention belongs to the field of lidar technology and discloses a lidar transceiver optical system, a lidar using the same, and a method for operating the same. The lidar transceiver optical system includes at least one transceiver module for transmitting laser signals to or receiving reflected laser signals from an optical fiber coupling module; an optical fiber coupling module for transmitting received transmitted laser signals to a conjugate system module or transmitting reflected laser signals received from the conjugate system module to the transceiver module for processing; a scanning module; a conjugate system module for focusing transmitted laser signals from the optical fiber coupling module onto the scanning module or coupling reflected laser signals received from the scanning module into the optical fiber coupling module, wherein the distance between the focal point of the focusing system and the scanning module is adjustable; and a beam expanding module for expanding and collimating the transmitted light signal from the scanning module and then directing it towards the area to be measured or for converging the reflected light signal from the area to be measured onto the scanning module.

The utility model relates to the technical field of scales, in particular to foldable portable garbage weighing and recycling equipment, which comprises slides forming a weighing equipment body, a bracket and sensing modules arranged below four end parts of the bracket, a control module and a battery module are arranged below the slides, the slides are divided into a left slide and a right slide, and the left slide and the right slide are connected with the bracket. The lower ends of the positions, close to each other, of the left support and the right support are hinged through an elastic piece, and abutting strips are arranged on the upper sections of the left support and the right support. When the left support and the right support are unfolded, the elastic piece contracts, the two abutting strips make contact, the left support and the right support are folded, the elastic piece is unfolded, and the two abutting strips are separated and arranged in parallel. Existing weighing equipment is divided, the supports are hinged through the elastic pieces, so that the two sides of the weighing equipment can be folded and unfolded, the abutting strips guarantee the structural stability after the weighing equipment is unfolded, and the situation that the precision of weighing data is affected due to the fact that the connecting positions of slides are concave inwards in the weighing process is avoided.

The application discloses an intrinsically safe isolated copper sheath fireproof cable, which comprises a copper sheath and a plurality of conductors, the plurality of conductors are uniformly distributed in the copper sheath, the copper sheath has high melting point and thermal stability, an air bag is arranged between two adjacent conductors, the air bag is filled with expansion material, the expansion material expands under heat, a heat insulation layer is arranged between the copper sheath and the conductors, the heat insulation layer is made of silicone rubber base material, the silicone rubber base material has high elasticity and thermal stability, a plurality of grooves are formed on the surface of the copper sheath, the grooves correspond to the conductors one by one, the plurality of conductors form a cavity, and a pushing piece is arranged in the cavity and used for pushing the conductors to move. The application has the effect of fireproof cable flame retardation.

The utility model discloses a platform elevator safety anti -pinch device, including center cylinder, buffer structure and limiting structure, and center cylinder has center cylinder through -hole, and limiting structure is along the circumferential direction of the inner surface of center cylinder distribution, and buffer structure includes a plurality of " " shape layer, and a plurality of " " shape layer respectively along the circumferential direction of the outer surface of center cylinder distribution, and the " " shape layer between adjacent two has interval, the utility model discloses a platform elevator safety anti -pinch device, its beneficial effect lies in, buffer structure sets up a plurality of " " shape layer, and the diameter of vertical rod is small far big, effectively increases the interval at the contact point of barrier, prevents barrier to be in and to be wound to center cylinder, reduces the possibility that barrier is accidentally clamped.

The present application belongs to the field of direct current transmission, and particularly relates to a support insulator, an insulating support structure and a direct current GIL. In order to solve the technical problem that the electric field lines pass through the support insulator in the prior art, resulting in that the normal field intensity of the side surface of the support insulator is too large, the present application provides a support insulator, which comprises a high-potential support surface for supporting a conductive rod, a low-potential support surface for supporting an insulating cylinder and a side surface, the high-potential support surface and the low-potential support surface are both arc surfaces, the axis of the high-potential support surface and the low-potential support surface corresponds to the axis of the matched conductive rod, and the extension line of the projection of the side surface of the support insulator in the direction of the axis of the corresponding conductive rod intersects with the axis of the conductive rod. The present application further provides an insulating support structure and a direct current GIL using the support insulator. By making the electric field lines parallel to the side surface of the support insulator, the normal field intensity of the side surface of the support insulator can be reduced, and the surface flashover voltage and the insulating strength of the support insulator can be improved.

This utility model relates to a grain processing and drying equipment. The structure includes: a dryer body, a processing cylinder, a rotary dispersing structure, and a sliding opening and closing mechanism. The top of the feed inlet of the dryer body is connected to the processing cylinder. Inside the processing cylinder, a rotary dispersing structure for dispersing materials is rotatably installed. A sliding opening and closing mechanism for controlling the material discharge is installed on the surface of the processing cylinder. By installing the rotary dispersing structure and using the sliding opening and closing mechanism to close the feed inlet of the processing cylinder, the grain is poured into the processing cylinder. A servo motor is then started, and the output shaft bevel gear of the servo motor contacts the bevel gear on the dispersing component, driving the upper and lower dispersing components to rotate in opposite directions, thus dispersing the grain and preventing clumps of grain from entering the dryer body and reducing drying efficiency.

The utility model provides a multichannel mixing and stirring tool for a microcalorimeter, which comprises a heat sink plug, a fixing rod is fixedly connected in the heat sink plug, and the top end of the fixing rod is fixed in a fixing cylinder; a plurality of injectors are clamped in the heat sink plug, and the interiors of the injectors are slidably connected with push rods; the interior of the fixed cylinder is slidably connected with a sliding cylinder, the bottom end of the sliding cylinder is fixedly connected with a heat insulation plug, the interior of the heat insulation plug is slidably connected with a compression rod and the push rod, and the top end of the push rod is clamped in the compression rod; a plurality of sliding grooves are formed in the side wall of the sliding cylinder, and protruding blocks are slidably connected into the sliding grooves. The protruding block is fixedly connected with the top end of the compression rod, and the compression rod is slidably connected with the interior of the sliding barrel. The multichannel mixing and stirring tool for the microcalorimeter provided by the utility model has the advantage that the injector is convenient to install.

The utility model discloses grass cutting and kneading equipment for livestock breeding, and relates to the technical field of livestock trough processing. Comprising a mounting bracket, the mounting bracket is provided with a processing mechanism for animal husbandry edible weeds, and the processing mechanism is characterized in that a hay cutter is inserted into a clamping groove in the outer side of a first mounting block through a clamping block, then a second bolt is rotated to mount and dismount the hay cutter, and when the hay cutter is abraded or damaged, the hay cutter can be mounted and dismounted. The second mounting block is arranged on one side of the first mounting block, a plurality of groups of hay cutting knives can be mounted, the distance between hay cutting grooves can be controlled, a plurality of groups of hay cutting knives can be mounted, and the distance between the hay cutting knives can be accurately controlled by adjusting the clamping positions of the hay cutting knives on the clamping grooves; the distance is increased when thick and hard forage is processed, the distance is reduced when thin and soft forage is processed, it is ensured that the best forage cutting effect is achieved, and the adaptability of the equipment to different kinds of forage is improved.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The utility model relates to brass solder production technical field especially a kind of stretching device for brass solder production, including machine body, fixed seat is connected in machine body bottom, winding assembly is set in the both sides of fixed seat top, the middle of machine body inside is provided with stretching die assembly, the both sides of machine body top are connected with connecting seat, the guide roller is rotatably arranged on two connecting seats, fixed beam is connected on the machine body of the both sides of stretching die assembly, the first guide wheel is connected in the bottom of two fixed beams, the bottom outside of two first guide wheels is guided as stretching die assembly, and one of fixed beam is provided with anti-deviation mechanism. The device passes through anti-deviation mechanism and guides to the first guide wheel of another side, guide roller in proper order, finally reaches another winding assembly, makes solder wire not easy to produce non-perpendicular angle of inclusion with the die mouth of stretching die assembly, to greatly improve the stability of stretching process.

A method for preparing coal tar pitch-based hard carbon anode material belongs to the field of anode materials. This method uses coal tar pitch as a raw material, leveraging its advantages of wide availability and high carbon content (rich in aromatic compounds). A precursor is obtained by adding a crosslinking agent and a modifier, followed by high-temperature sintering to obtain hard carbon. This invention improves the interlayer spacing of the material through the modifier, resulting in hard carbon with high specific capacity and initial coulombic efficiency, with an initial discharge specific capacity exceeding 300 mA hg. ‑1 .